JP5426322B2 - Air conditioning system and air conditioning method - Google Patents

Description

  The present invention relates to an air conditioning system and an air conditioning method.

  In general, large-scale buildings such as office buildings employ a variable air volume single-duct air conditioning system in order to keep the temperature (room temperature) of the air-conditioning target space constant. The reason for this is that, compared with the single duct system with constant airflow, which is often used in the past, the room temperature follow-up performance is high, and the amount of air flow is restricted by the heat load of the air-conditioned space. It is.

  The basic temperature control concept of the air conditioning system of variable air volume single duct system is as follows. An air conditioning unit (Air Handling Unit: AHU) that handles a space to be air-conditioned that has a plurality of air-conditioning zones that do not necessarily have the same thermal load generation status is a main duct that has its air supply route directly out of the air-conditioner The air supply duct is used as a swing, through a plurality of branch ducts that are divided in the air conditioning zone by branching in the middle, and finally to a number of outlets in the ceiling of the space to be air-conditioned. The air conditioner is in charge of multiple air conditioning target spaces, but in principle, the temperature-controlled air sent to the air supply path is supplied without changing the air temperature, and the air supply air volume from the air outlets corresponding to each air conditioning target space Is changed according to the heat load of the air-conditioning target space, and the indoor load and the building load are processed.

  Therefore, air volume adjustment to each air-conditioning target space (individual part of air-conditioning target space: in some cases, air-conditioning zone) may be sent to the air-conditioning target space from the ceiling outlet because the set room temperature and thermal load may differ. It is necessary to adjust the air volume of cold and hot air.

  Therefore, a device in which an air volume variable device (Variable Air Volume: VAV) having a damper as an air flow restricting means is installed in front of the air outlet of the air supply path from the air conditioner to the air conditioning target space is generally used. . And in the intermediate period when the heat load of each air-conditioning zone in the air-conditioning target space is low, the air volume variable device is narrowed down and the temperature-controlled air pushed into the air supply path by the air conditioner as a whole often becomes excessive. Become. Therefore, a pressure sensor that measures static pressure is installed in a supply chamber that is arranged in the supply duct that is the main duct or a bent portion of the supply duct, and the pressure difference is measured from the atmospheric pressure. Accordingly, the rotational energy of the blower fan provided in the air conditioner is controlled to prevent the amount of temperature-controlled air from flowing excessively, thereby reducing the conveyance energy. (See Patent Document 1).

  However, in the air conditioning system of the variable air volume single duct system shown in Patent Document 1, the air flow supplied to the air conditioning target space is reduced by restricting the air supplied from the blower fan to the air supply duct with a damper built in the air volume variable device. Since the air pressure is adjusted, the air supply is supplied so that the pressure value of the air supply duct becomes, for example, 200 to 300 Pa, and most of the pressure value 200 to 300 Pa acts as a damper resistance. There is a problem that the power consumption of the blower fan increases due to its large size. Furthermore, since the pressure in the air supply duct between the blower fan and the damper with the air volume variable device is as large as the pressure value of 200 to 300 Pa, and the static pressure due to opening / closing of the damper also fluctuates greatly, the air supply duct There is a need for a structure having high strength that does not deform due to fluctuations, and therefore, there is a problem that equipment costs increase.

  In order to cope with such a problem, the present applicant has determined that the rotation speed at which the supply air is supplied to the air-conditioning target space between the branch duct and the outlet of the air supply path that supplies the air supply from the air-conditioning apparatus to the air-conditioning target space. The temperature of the small fan handling area that is divided into the air-conditioning target space by adjusting the rotation speed of the small blower based on the detection temperature of the temperature sensor provided in each air-conditioning zone with an adjustable small fan Have applied for an air volume variable device and an air conditioning system that can control the airflow independently (see Patent Document 2).

  In Patent Document 2, the static pressure in the supply chamber that is arranged in the supply duct that is the main duct supplied from the blower fan of the air conditioner, the bent portion of the supply duct, or the like is slightly positive (for example, 0 to 0). The air supply is supplied by controlling the rotational speed of the blower fan so as to be maintained at 5 Pa), and the small blower adjusts the rotational speed based on the temperature detected by the temperature sensor provided in the air-conditioning target space. The amount of air supplied to the target space is controlled independently by the small air blower, which is equivalent to the amount of air supplied from the static pressure measurement point to the air outlet. Since the static pressure rise in the duct can be greatly reduced, the selection of the air passage material is expanded, and the air passage resistance for adjusting the air volume is basically eliminated as compared with the air conditioning method by the damper. Since pressure loss is significantly reduced, It is possible to effectively reduce the conveying power of the air conditioner.

JP 2002-357356 A JP 2008-051466 A

  However, in the above-mentioned Patent Document 2, two air blowers, that is, a blower fan of an air conditioner and a small blower of an air volume variable device are arranged in series in the air supply path, and each air blower is an air supply duct which is a main duct. The rotation speed of the blower fan is controlled by the controller so that the pressure detected by the pressure sensor provided in the supply chamber placed in the bent part of the air supply duct is maintained at a constant value. Since the number of rotations is controlled independently based on the temperature detected by the temperature sensor provided in each air conditioning zone, the rotation speed control of the blower fan and the rotation speed control of the small fan follow up, and the control is unstable. In addition, since the efficiency is remarkably reduced at partial load rotation where the rotational speed of the small blower is low, even if each small blower is controlled with an expensive inverter, Min control effect can not issue obtained even had. For the above-mentioned problem that the control becomes unstable, the static pressure of the blower fan is slightly increased to further slow down the response of the control, so that the follow-up of the control does not occur. In the problem of reduced load efficiency, there is a case where the minimum rotational speed is specified to be high, and in that case, the ideal conveyance power cannot be reduced and the power increases. .

  In addition, the control of the number of rotations of equipment with motors called small blowers based on the temperature detected by the temperature sensor provided in each air conditioning zone is compared with the air conditioning system of the air volume variable device with a built-in damper. There is a case where the operating device becomes expensive, and there is a problem that the equipment cost of the control device is not necessarily reduced.

  The present invention has been made in view of the above-described circumstances, and it is possible to reduce the operating cost of the air conditioner by reducing the overall blower conveyance power including the blower fan of the air conditioner and the small fan of the air volume variable device. And it aims at providing the air-conditioning system and the air-conditioning method which enabled it to reduce the installation cost of a control apparatus by simple apparatus structure.

An air conditioning system according to a first aspect of the present invention divides an air conditioning target space into a plurality of air conditioning zones, arranges at least one small blower for each air conditioning zone, and has an air conditioner having a temperature controller and a blower fan. Is connected to the branch chamber by an air supply duct, and the branch chamber is connected to a small blower arranged for each of the air conditioning zones by a zone duct, and the temperature is transferred from the small blower to a plurality of outlets arranged on the ceiling of each air conditioning zone. In a configuration connected to send conditioned air supply,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and the return air temperature sensor responds based on the return air upper limit allowable temperature and return air lower limit allowable temperature and zone onset stop calculating unit to indicate the start and stop of a small blower of the air conditioning zone,
Even one of the return air detection temperatures from the return air temperature sensor for each of the plurality of air-conditioning zones from the zone start / stop calculation unit is higher than the return air upper limit allowable temperature or lower than the return air lower limit allowable temperature. A state signal is input, and a time measurement calculation unit that measures and calculates an excess time of the return air upper limit allowable temperature and / or an excess time of the return air lower limit allowable temperature;
Based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the excess allowable time of the return air upper limit allowable temperature and the return air lower limit allowable temperature of each preset air conditioning zone are set. A supply air temperature variable calculation unit that changes the set temperature in the temperature controller by comparison with the allowable excess time,
In the supply air temperature variable calculation unit,
If there are only air-conditioning zones that are too hot, that is, only air-conditioning zones that exceed the maximum allowable return air temperature, change the set temperature of the supply air temperature to a temperature lower than the current set value,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, if there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, or an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature is set. Keep the temperature at the current setpoint,
If there are only air-conditioning zones that are too cold, that is, only air-conditioning zones that exceed the allowable upper limit of return air lower limit temperature, change the set temperature of the supply air temperature to a temperature higher than the current set value,
If there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, if there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the upper limit of the return air lower limit temperature, the supply air temperature is set to the current setting value. Perform each calculation to change to a lower temperature
It outputs to the said temperature controller, It is characterized by the above-mentioned .

The air conditioning system according to claim 2 of the present invention divides the air conditioning target space into a plurality of air conditioning zones, arranges at least one small blower for each air conditioning zone, and has an air conditioner having a temperature controller and a blower fan. Is connected to the branch chamber by an air supply duct, and the branch chamber is connected to a small blower arranged for each of the air conditioning zones by a zone duct, and the temperature is transferred from the small blower to a plurality of outlets arranged on the ceiling of each air conditioning zone. In a configuration connected to send conditioned air supply,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and the return air temperature sensor responds based on the return air upper limit allowable temperature and return air lower limit allowable temperature A zone start / stop calculation unit for instructing start / stop of a small blower in an air-conditioning zone
Even one of the return air detection temperatures from the return air temperature sensor for each of the plurality of air-conditioning zones from the zone start / stop calculation unit is higher than the return air upper limit allowable temperature or lower than the return air lower limit allowable temperature. A state signal is input, and a time measurement calculation unit that measures and calculates an excess time of the return air upper limit allowable temperature and / or an excess time of the return air lower limit allowable temperature;
Based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the excess allowable time of the return air upper limit allowable temperature and the return air lower limit allowable temperature of each preset air conditioning zone are set. A supply air temperature variable calculation unit that changes the set temperature in the temperature controller by comparison with the allowable excess time,
In the supply air temperature variable calculation unit,
If there are only air-conditioning zones that are too hot, that is, only air-conditioning zones that exceed the maximum allowable return air temperature, change the set temperature of the supply air temperature to a temperature lower than the current set value,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, if there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, or an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature is set. Keep the temperature at the current setpoint,
If there are only air-conditioning zones that are too cold, that is, only air-conditioning zones that exceed the allowable upper limit of return air lower limit temperature, change the set temperature of the supply air temperature to a temperature higher than the current set value,
If there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, if there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the upper limit of the return air lower limit temperature, the supply air temperature is set to the current setting value. Perform each calculation to change to a higher temperature
It outputs to the said temperature controller, It is characterized by the above-mentioned .

An air conditioning system according to a third aspect of the present invention is an air conditioner having a temperature controller and a blower fan, wherein an air-conditioning target space is divided into a plurality of air conditioning zones, and at least one small blower is arranged for each air conditioning zone. Is connected to the branch chamber by an air supply duct, and the branch chamber is connected to a small blower arranged for each of the air conditioning zones by a zone duct, and the temperature is transferred from the small blower to a plurality of outlets arranged on the ceiling of each air conditioning zone. In a configuration connected to send conditioned air supply,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature ;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and set the return air upper limit allowable temperature, return air lower limit allowable temperature set for each air conditioning zone, And a schedule start / stop calculation unit for instructing start / stop by a schedule rotation of the small blower in each air conditioning zone corresponding to the return air temperature sensor based on the start start time and the stop start time;
One of the return air detection temperatures from the return air temperature sensor for each of the plurality of air conditioning zones from the schedule start / stop calculation unit is higher than the return air upper limit allowable temperature or lower than the return air lower limit allowable temperature. A state signal is input, and a time measurement calculation unit that measures and calculates an excess time of the return air upper limit allowable temperature and / or an excess time of the return air lower limit allowable temperature;
Based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the excess allowable time of the return air upper limit allowable temperature and the return air lower limit allowable temperature of each preset air conditioning zone are set. A supply air temperature variable calculation unit that changes the set temperature in the temperature controller by comparison with the allowable excess time,
In the supply air temperature variable calculation unit,
If there are only air-conditioning zones that are too hot, that is, only air-conditioning zones that exceed the maximum allowable return air temperature, change the set temperature of the supply air temperature to a temperature lower than the current set value,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, if there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, or an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature is set. Keep the temperature at the current setpoint,
If there are only air-conditioning zones that are too cold, that is, only air-conditioning zones that exceed the allowable upper limit of return air lower limit temperature, change the set temperature of the supply air temperature to a temperature higher than the current set value,
If there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, if there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the upper limit of the return air lower limit temperature, the supply air temperature is set to the current setting value. Perform each calculation to change to a lower temperature
It outputs to the said temperature controller, It is characterized by the above-mentioned .

An air conditioning system according to a fourth aspect of the present invention is an air conditioner having a temperature controller and a blower fan, wherein an air-conditioning target space is divided into a plurality of air conditioning zones, and at least one small blower is disposed in each air conditioning zone. Is connected to the branch chamber by an air supply duct, and the branch chamber is connected to a small blower arranged for each of the air conditioning zones by a zone duct, and the temperature is transferred from the small blower to a plurality of outlets arranged on the ceiling of each air conditioning zone. In a configuration connected to send conditioned air supply,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and set the return air upper limit allowable temperature, return air lower limit allowable temperature set for each air conditioning zone, And a schedule start / stop calculation unit for instructing start / stop by a schedule rotation of the small blower in each air conditioning zone corresponding to the return air temperature sensor based on the start start time and the stop start time;
One of the return air detection temperatures from the return air temperature sensor for each of the plurality of air conditioning zones from the schedule start / stop calculation unit is higher than the return air upper limit allowable temperature or lower than the return air lower limit allowable temperature. A state signal is input, and a time measurement calculation unit that measures and calculates an excess time of the return air upper limit allowable temperature and / or an excess time of the return air lower limit allowable temperature;
Based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the excess allowable time of the return air upper limit allowable temperature and the return air lower limit allowable temperature of each preset air conditioning zone are set. A supply air temperature variable calculation unit that changes the set temperature in the temperature controller by comparison with the allowable excess time,
In the supply air temperature variable calculation unit,
If there are only air-conditioning zones that are too hot, that is, only air-conditioning zones that exceed the maximum allowable return air temperature, change the set temperature of the supply air temperature to a temperature lower than the current set value,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, if there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, or an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature is set. Keep the temperature at the current setpoint,
If there are only air-conditioning zones that are too cold, that is, only air-conditioning zones that exceed the allowable upper limit of return air lower limit temperature, change the set temperature of the supply air temperature to a temperature higher than the current set value,
If there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, if there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the upper limit of the return air lower limit temperature, the supply air temperature is set to the current setting value. Perform each calculation to change to a higher temperature
It outputs to the said temperature controller, It is characterized by the above-mentioned.

  The air conditioning system according to claim 5 of the present invention, in addition to the air conditioning system according to any one of claims 1 to 4, is configured so that the control device instructs start / stop from the zone start / stop calculation unit or the schedule start / stop calculation unit. Is provided with a simultaneous start / stop prevention calculation unit for preventing simultaneous start / stop of the small blower provided for each air conditioning zone even if the air conditioners are output substantially simultaneously in a plurality of air conditioning zones.

  An air conditioning system according to a sixth aspect of the present invention, in addition to the air conditioning system according to any one of the first to fifth aspects, provides return air to the air conditioning target space for returning return air from the air conditioning target space to the air conditioner. A ceiling room is provided as a route, and the branch chamber, the zone duct, the small blower, and a return air temperature sensor for each of a plurality of air-conditioning zones are provided in the ceiling room.

  An air conditioning system according to a seventh aspect of the present invention is provided with an indoor temperature sensor for detecting a room temperature in a part of the air conditioning zones in addition to the air conditioning system according to any one of the first to sixth aspects. Then, instead of the control device, it has a single controller for controlling the rotational speed of the small blowers in the part of the air conditioning zones based on the indoor temperature detected from the indoor temperature sensor.

According to an air conditioning method of an eighth aspect of the present invention, an air conditioning apparatus having a temperature controller and a blower fan, wherein the air-conditioning target space is divided into a plurality of air conditioning zones, and at least one small blower is disposed in each air conditioning zone. Is connected to the branch chamber by an air supply duct, and the branch chamber is connected to a small blower arranged for each of the air conditioning zones by a zone duct, and the temperature is transferred from the small blower to a plurality of outlets arranged on the ceiling of each air conditioning zone. In a configuration connected to send conditioned air supply,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and the return air temperature sensor responds based on the return air upper limit allowable temperature and return air lower limit allowable temperature A zone start / stop calculation unit for instructing start / stop of a small blower in an air-conditioning zone
Input each return air detection temperature from the return air temperature sensor for each of the plurality of air conditioning zones, and based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the temperature A variable supply air temperature calculation unit for changing the set temperature in the controller;
An air conditioning method for cooling using an air conditioning system having
In each air conditioning zone, the excess allowable time of the return air upper limit allowable temperature and the excess allowable time of the return air lower limit allowable temperature are set in the control device in advance,
When there is only an air-conditioning zone that is too hot, that is, only an air-conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, the supply air temperature variable calculation unit sets the supply air temperature to a temperature lower than the current set value. change,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, when there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, and an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature variable calculation To maintain the set temperature of the supply air temperature at the current set value,
When there are only air-conditioning zones that are too cold, that is, there are only air-conditioning zones that exceed the allowable upper limit of the return air lower limit temperature, the supply air temperature can be set higher than the current set value by the variable air supply temperature calculator. change,
When there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the lower limit of the return air, the supply air temperature variable calculation unit The set temperature is changed to a temperature lower than the current set value.

The air conditioning method according to claim 9 of the present invention is an air conditioner having a temperature controller and a blower fan, wherein an air-conditioning target space is divided into a plurality of air conditioning zones, and at least one small blower is arranged for each air conditioning zone. Is connected to the branch chamber by an air supply duct, and the branch chamber is connected to a small blower arranged for each of the air conditioning zones by a zone duct, and the temperature is transferred from the small blower to a plurality of outlets arranged on the ceiling of each air conditioning zone. In a configuration connected to send conditioned air supply,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and set the return air upper limit allowable temperature, return air lower limit allowable temperature set for each air conditioning zone, And a schedule start / stop calculation unit for instructing start / stop by a schedule rotation of the small blower in each air conditioning zone corresponding to the return air temperature sensor based on the start start time and the stop start time;
Input each return air detection temperature from the return air temperature sensor for each of the plurality of air conditioning zones, and based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the temperature A variable supply air temperature calculation unit for changing the set temperature in the controller;
An air conditioning method for cooling using an air conditioning system having
In each air conditioning zone, the excess allowable time of the return air upper limit allowable temperature and the excess allowable time of the return air lower limit allowable temperature are set in the control device in advance,
When there is only an air-conditioning zone that is too hot, that is, only an air-conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, the supply air temperature variable calculation unit sets the supply air temperature to a temperature lower than the current set value. change,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, when there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, and an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature variable calculation To maintain the set temperature of the supply air temperature at the current set value,
When there are only air-conditioning zones that are too cold, that is, there are only air-conditioning zones that exceed the allowable upper limit of the return air lower limit temperature, the supply air temperature can be set higher than the current set value by the variable air supply temperature calculator. change,
When there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the lower limit of the return air, the supply air temperature variable calculation unit The set temperature is changed to a temperature lower than the current set value.

The air conditioning method according to claim 10 of the present invention is an air conditioner having a temperature controller and a blower fan, wherein the air-conditioning target space is divided into a plurality of air conditioning zones, and at least one small blower is arranged for each air conditioning zone. Is connected to the branch chamber by an air supply duct, and the branch chamber is connected to a small blower arranged for each of the air conditioning zones by a zone duct, and the temperature is transferred from the small blower to a plurality of outlets arranged on the ceiling of each air conditioning zone. In a configuration connected to send conditioned air supply,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and the return air temperature sensor responds based on the return air upper limit allowable temperature and return air lower limit allowable temperature A zone start / stop calculation unit for instructing start / stop of a small blower in an air-conditioning zone
Input each return air detection temperature from the return air temperature sensor for each of the plurality of air conditioning zones, and based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the temperature A variable supply air temperature calculation unit for changing the set temperature in the controller;
An air conditioning method for cooling using an air conditioning system having
In each air conditioning zone, the excess allowable time of the return air upper limit allowable temperature and the excess allowable time of the return air lower limit allowable temperature are set in the control device in advance,
When there is only an air-conditioning zone that is too hot, that is, only an air-conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, the supply air temperature variable calculation unit sets the supply air temperature to a temperature lower than the current set value. change,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, when there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, and an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature variable calculation To maintain the set temperature of the supply air temperature at the current set value,
When there are only air-conditioning zones that are too cold, that is, there are only air-conditioning zones that exceed the allowable upper limit of the return air lower limit temperature, the supply air temperature can be set higher than the current set value by the variable air supply temperature calculator. change,
When there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the lower limit of the return air, the supply air temperature variable calculation unit The set temperature is changed to a temperature higher than the current set value.

According to an air conditioning method of an eleventh aspect of the present invention, an air conditioning apparatus having a temperature controller and a blower fan, wherein an air-conditioning target space is divided into a plurality of air conditioning zones, and at least one small blower is disposed for each air conditioning zone. Is connected to the branch chamber by an air supply duct, and the branch chamber is connected to a small blower arranged for each of the air conditioning zones by a zone duct, and the temperature is transferred from the small blower to a plurality of outlets arranged on the ceiling of each air conditioning zone. In a configuration connected to send conditioned air supply,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and set the return air upper limit allowable temperature, return air lower limit allowable temperature set for each air conditioning zone, And a schedule start / stop calculation unit for instructing start / stop by a schedule rotation of the small blower in each air conditioning zone corresponding to the return air temperature sensor based on the start start time and the stop start time;
Input each return air detection temperature from the return air temperature sensor for each of the plurality of air conditioning zones, and based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the temperature A variable supply air temperature calculation unit for changing the set temperature in the controller;
An air conditioning method for cooling using an air conditioning system having
In each air conditioning zone, the excess allowable time of the return air upper limit allowable temperature and the excess allowable time of the return air lower limit allowable temperature are set in the control device in advance,
When there is only an air-conditioning zone that is too hot, that is, only an air-conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, the supply air temperature variable calculation unit sets the supply air temperature to a temperature lower than the current set value. change,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, when there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, and an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature variable calculation To maintain the set temperature of the supply air temperature at the current set value,
When there are only air-conditioning zones that are too cold, that is, there are only air-conditioning zones that exceed the allowable upper limit of the return air lower limit temperature, the supply air temperature can be set higher than the current set value by the variable air supply temperature calculator. change,
When there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the lower limit of the return air, the supply air temperature variable calculation unit The set temperature is changed to a temperature higher than the current set value.

An air conditioning method according to claim 12 of the present invention is an air conditioning method for performing air conditioning by using the air conditioning system according to claim 5, wherein simultaneous start and stop of the small blowers provided for each air conditioning zone are not overlapped. A start delay signal or stop delay signal is issued to all air-conditioning zones by a start signal or stop signal previously issued by the stop prevention calculation unit so that the start signal or stop signal is not output to the small blower unless a predetermined time has elapsed. By calculating, the start / stop of the small blower provided for each air conditioning zone is shifted and controlled.

An air conditioning method according to claim 13 of the present invention is an air conditioning method that performs air conditioning using the air conditioning system according to claim 7, and includes a single controller that inputs the room temperature of room temperature sensors provided in some air conditioning zones. It is characterized by controlling the room temperature of a part of the air-conditioning zones to be constant by controlling the rotational speed of the small blower.

  According to the air conditioning system and the air conditioning method of the present invention, the following excellent effects can be obtained.

  (1) The rotational speed of the blower fan is controlled so that the pressure in the branch chamber is maintained at a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all the small blowers are stopped, and each air-conditioner Based on the return air temperature for each zone, start / stop the small blower for each air conditioning zone corresponding to each return air temperature sensor, or start and stop the start time of each air conditioning zone, Since the small air blowers in each air conditioning zone are started and stopped by scheduled rotation based on the return air upper limit allowable temperature and return air lower limit allowable temperature, control is facilitated by a simple device configuration. Equipment costs can be reduced.

(2) The temperature / humidity of the air-conditioned space is determined by the brain using the physiological sensors of humans who live (mainly feeling the actual temperature and the temperature of the body affected by the wind) The comfortable environmental condition to be made is replaced with, for example, the temperature and humidity of air that fills the air-conditioning target space. This human physiological sensor may feel the change with a delay if the change is moderate with respect to the temperature and humidity change of the air. Because the physiological sensor has a response delay due to the thermal sensation felt by humans and the comfort sensation based on it, the indoor air supply has a comfortable feeling in an environment where air is constantly supplied, and a predetermined schedule. The feeling of comfort in an environment where air supply / air supply is stopped is almost the same and may not be impaired.
By using this reproducible phenomenon, it is scheduled to start air supply before the time until it is felt that the comfort is impaired even if the air temperature in the air conditioning zone rises and the air temperature in the air conditioning zone rises. Air supply that does not depend on the heat load of the air-conditioning target space by performing the operation of sequentially starting or stopping the small fans in each air-conditioning zone by schedule rotation with the start-up time and stop-start time set in advance by the stop calculation unit Control can be performed, and the conveyance energy of supply air can be significantly reduced.
In addition, when there is a hot air conditioning zone, that is, an air conditioning zone that exceeds the maximum allowable return air temperature, the schedule start / stop calculation unit forcibly activates the small blower in that air conditioning zone, and the air conditioning temperature that is below the cold air conditioning zone, that is, the minimum return air allowable temperature When there is a zone, the small blower in the air-conditioning zone is forcibly stopped by the schedule start / stop calculation unit, so that it is possible to prevent the comfortable temperature condition of the air-conditioning target space from being greatly collapsed.

  (3) Because the variable supply air temperature calculation unit changes the set temperature in the temperature controller based on the allowable return time of the return air upper limit allowable temperature or the allowable upper limit of the return air lower limit temperature of each air conditioning zone. In addition to being able to accurately control load reset with a single air duct system with variable air flow, the temperature difference between the inlet and outlet air by the temperature regulator of the air conditioner can be further expanded, increasing the amount of heat that can be carried with the minimum outdoor air volume. The number of operations and the operation time of the start / stop of the small blower in the zone are reduced, and thus the conveyance power of the small blower can be reduced.

  (4) Since the simultaneous start / stop prevention calculation unit prevents the simultaneous start / stop of the small blowers provided in each air-conditioning zone, fluctuations in pressure in the branch chamber or the zone duct can be suppressed.

  (5) Compared with the rotational speed control, the small blower can always be operated at a point where the energy ratio of the electric power input to the motor to the carry energy of the supply air volume is high in efficiency, thereby reducing the carry power of the small blower. .

It is a composition conceptual diagram showing one example of an air-conditioning system of the present invention. It is a top view which shows an example of the air conditioning zone of the air conditioning system of FIG. It is a top view which shows the other example of FIG. It is a diagram for demonstrating the control method of the pressure controller with which this invention is equipped. It is a diagram for demonstrating the control method of the temperature controller with which this invention is equipped. It is a block diagram which shows an example of the control apparatus with which this invention is equipped. It is a control flowchart at the time of controlling one air-conditioning zone by a zone start / stop calculating part. It is a diagram which shows the control operation | movement of starting and a stop of a small air blower by a zone start / stop calculating part. It is a diagram which shows the driving | operation operation | movement of starting and stopping of a small air blower by a zone start / stop calculation part. It is a flowchart which shows an example of the supply air temperature variable calculating part with which a control apparatus is equipped. It is a flowchart which shows an example of the simultaneous start / stop prevention calculating part with which a control apparatus is equipped. It is a block diagram which shows the other example of the control apparatus shown in FIG. It is a control flowchart at the time of controlling one air-conditioning zone by a schedule start / stop calculating part. It is a diagram which shows the control operation | movement of a start / stop of a small air blower by a schedule start / stop calculating part. It is a diagram which shows the driving | operation operation | movement of starting and stopping of a small air blower by a schedule start / stop calculation part. It is a composition conceptual diagram showing other examples of an air-conditioning system of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an embodiment of the air conditioning system of the present invention. A machine room B is provided adjacent to a room which is an air-conditioning target space A of a building, and an air conditioner 1 is provided in the machine room B. ing. The air conditioner 1 includes a temperature regulator 2 such as a cold / hot water coil or a direct expansion coil and a blower fan 3, and generally returns to the ceiling from a ceiling slit 5 provided in the ceiling 4 of the air-conditioning target space A. The return air RA guided to the ceiling chamber C called a chamber is caused by the suction force of the blower fan 3 to the air conditioner 1 by the return air duct 6 that has an open end to the ceiling chamber C from the ceiling inner wall of the machine room B. In addition, the outside air OA is supplied to the air conditioner 1 by an outside air blower (not shown) through the outside air duct 7 or introduced by the suction force of the blowing fan 3. Then, after the return air RA and the outside air OA are mixed in the air conditioner 1, the temperature of the mixed air is adjusted by the temperature controller 2, and then supplied as air supply SA by the blower fan 3 in the main duct. The air is supplied to a branch chamber 9 provided in the ceiling room C through a certain air supply duct 8. That is, in the prior art, depending on the case, an air supply duct is connected to the air conditioner and only the branch duct is directly branched. However, in the present invention, the branch chamber 9 connected to the air conditioner 1 via the air supply duct. It has. Further, an exhaust fan 10 is provided between the ceiling chamber C and the outside of the building, and an open end at the end is communicated by an exhaust duct 11, and the air conditioner 1 is connected by the outside air duct 7. Exhaust air EA of substantially the same amount as the outside air OA supplied to the air is exhausted from the part of the return air RA to the outside of the building by the exhaust fan 10. Such an air-conditioning ventilation system for the air-conditioning target space A is called a ceiling return system using a ceiling return air chamber, and has been increasingly used with the spread of system ceilings.

  When the air conditioning target space A is cooled, the temperature controller 2 is provided with a cooling coil, and when the air conditioning target space A is heated, the temperature controller 2 is provided with a hot water coil. The hot water coil and the hot water coil may be provided individually or may be a cold / hot water coil that can realize the function by switching the supply of the heat medium, and the case where the air-conditioning target space A is cooled will be described below.

  FIG. 2 shows a plan view of the air conditioning system of FIG. 1. In FIG. 2, an air conditioning target space A having a shape surrounding the machine room B in a U-shape is divided into three air conditioning zones (zone 1, zone 2). , Zone 3), and three small fans 12a, 12b, 12c corresponding to each of the air-conditioning zones are arranged in the ceiling chamber C, and each small fan 12a, 12b, 12c is connected to the several blower outlet 13 arrange | positioned on the ceiling for every air-conditioning zone. And the small air blowers 12a, 12b, and 12c arranged for each air conditioning zone are connected to the branch chamber 9 via the zone duct 14. FIG. 2 shows a case where three small fans arranged for each air-conditioning zone are collectively connected to the branch chamber 9 by one zone duct 14, but as shown in FIG. Each small air blower 12 a, 12 b, 12 c may be connected to the branch chamber 9 by a unique zone duct 14. As shown in FIGS. 2 and 3, the return air duct 6 sucks the return air RA into the air conditioner 1 through three inlets 15 which are open ends at the ends corresponding to the respective air conditioning zones. I try to return it.

  In FIG. 1, 16 is a pressure controller, and this pressure controller 16 has a pressure detection signal from a pressure sensor 17 for detecting the pressure in the branch chamber 9 or in the zone duct 14 in the vicinity of the branch chamber by the atmospheric pressure differential pressure. , And the pressure controller 16 receives the minimum outside air volume legally determined for each air-conditioning zone when all the small fans 12a, 12b, and 12c are stopped (for example, exhalation of indoor personnel in the living room). In order to prevent the increase in carbon dioxide concentration due to airflow, it refers to the constant air pressure (the air duct resistance and the set air flow) at which the air per unit of floor area is multiplied by 20m3 / h of outside air per person. For example, in general offices, as the minimum outside air volume, the air supply volume determined from the heat load of the air-conditioning space and the temperature difference between the inlet and outlet of the temperature controller that processes it, and the minimum outside air volume to be introduced Inverter 18 of blower fan 3 so as to maintain the same ratio as the air volume: approximately 30% of the rated air volume, and a constant pressure (for example, 12 Pa) that can ensure about 30% of the rated air volume is maintained. To control the rotation speed of the blower fan 3. As shown in FIG. 4, the pressure controller 16 is based on a deviation between a pressure value (discharge pressure) measured by the pressure sensor 17 and a constant pressure set value (discharge pressure setting) to which the minimum outside air volume is supplied. By outputting the inverter output command obtained by the linear curve of the proportional band set as the relationship between the discharge pressure and the output command defined in FIG. 4 to the inverter 18 of the blower fan 3 which is an operating device, The rotation speed of the blower fan 3 is controlled.

  In FIG. 1, 19 is a temperature controller, and a temperature detection signal from a temperature sensor 20 that detects the temperature of the supply air SA flowing in the supply air duct 8 is input to the temperature controller 19. The temperature controller 19 commands the opening degree of the two-way valve 21 that adjusts the flow rate of the temperature adjusting fluid that is a heat medium supplied to the temperature adjuster 2, and the temperature of the supply air SA is held at a predetermined set temperature. To control. As shown in FIG. 5, the temperature controller 19 determines the supply air temperature and the two directions specified in FIG. 5 based on the deviation between the supply air SA temperature value measured by the temperature sensor 20 and the set temperature of the supply air. By opening a two-way valve opening command obtained from a linear curve in a proportional band set as a relationship with the valve opening command to the two-way valve 21 which is an actuator, the opening of the two-way valve 21 To control.

  In FIG. 1, 22 is a control device, and this control device 22 is arranged at or near the open end of the inlet 15 for sucking the return air RA of each air conditioning zone shown in FIGS. The return air detection temperature from the return air temperature sensors 23a, 23b, and 23c for detecting the temperature of the RA is input, and the control device 22 performs the small blower 12a based on the preset upper limit allowable temperature and lower limit allowable temperature. , 12b, 12c is calculated for each air conditioning zone, and the small blower 12a, A plurality of air conditioners from the zone start / stop calculation unit 24 shown in the control block diagram of FIG. 6 and the return air temperature sensors 23a, 23b, 23c, which output an opening / closing instruction for starting / stopping 12b, 12c. Supply air temperature for changing the set temperature in the temperature controller 19 based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature by inputting each return air detection temperature for each zone A variable calculation unit 25 is provided.

  Further, the control device 22 includes a simultaneous start / stop prevention calculation unit 26 for preventing simultaneous start / stop of the small fans 12a, 12b, 12c in each air conditioning zone.

  FIG. 6 is a block diagram showing an example of the control device 22. The zone start / stop calculation unit 24 provided in the control device 22 includes a plurality of air conditioners from the air conditioner start signal and return air temperature sensors 23a, 23b, and 23c. Each return air detection temperature for each zone, and the set value of the return air upper limit allowable temperature and the return air lower limit allowable temperature of each air conditioning zone are entered, and further, business hours and stoppages during the day and night If the start-up mode is set for each air-conditioning zone in order to quickly start a comfortable environment at the start of business hours in the morning, the start-up mode is entered. .

Then, as shown in the control flowchart for controlling one air-conditioning zone by the zone start / stop calculation unit 24 in FIG. 7, when the air-conditioning is started, when the start-up mode is present, the start-up mode is set for a predetermined time. After the control is performed to rapidly change the temperature of the air-conditioning zone to the set temperature, as shown in the control operation of FIG. 8 and the operation operation of FIG. If it is determined that the temperature is higher than the allowable temperature, that is, θ _{Ri (PV)} > θ _{Hi (SP)} , the small blower corresponding to the air conditioning zone is activated, and the return air detection temperature is set at the lower limit of the return air in step S2. If it is lower than the temperature, that is, θ _{Ri (PV)} <θ _{Li (SP)} is determined, control is performed to stop the small blower corresponding to the air conditioning zone. In decision step S3 Ri to maintain now start or stop state, performs control for outputting a signal having the same start or stop the state of small blower. And it returns to step S1 for every predetermined time, and continues and performs the same calculation again, and controls. Therefore, in the case of cooling operation, the zone start / stop calculation unit 24 activates a small blower in the air-conditioning zone when there is a hot air-conditioning zone based on the return air detection temperature of each air-conditioning zone, and has a cold air-conditioning zone. In some cases, control is performed to stop the small blower in the air conditioning zone.

  Further, in the zone start / stop calculation unit 24 of FIG. 6, one of the return air detection temperatures for each air-conditioning zone is higher than the return air upper limit allowable temperature or lower than the return air lower limit allowable temperature. Is calculated, a state signal indicating that the return air upper limit allowable temperature has been exceeded or a state signal falling below the return air lower limit allowable temperature is input to the time measurement calculation unit 27. Then, the time measurement calculation unit 27 calculates the excess time of the return air upper limit allowable temperature and the return air lower limit allowable temperature of each air conditioning zone, and exceeds the calculated upper limit allowable temperature of the return air temperature of each air conditioning zone. The time and the excess time of the lower limit allowable temperature are input to the supply air temperature variable calculation unit 25.

  Further, in the supply air temperature variable calculation unit 25, preset set values for the allowable excess time of the return air upper limit allowable temperature and the allowable excess time of the return air lower limit allowable temperature of each air conditioning zone are input. Whether the excess time of the allowable temperature exceeds the set value of the allowable excess time of the return air upper limit allowable temperature, and whether the excess time of the return air lower limit allowable temperature exceeds the set value of the allowable excess time of the return air lower limit allowable temperature And a signal for changing the set value of the supply air temperature is output to the temperature controller 19 (FIG. 1) according to the combination of the calculation results. The supply air temperature variable calculation unit 25 stores the current supply air temperature setting value.

  In the variable air volume single duct system, the supply air volume is controlled by the air volume variable device based on the measured value of the indoor temperature sensor, but the thermal load in the air-conditioned room such as in the intermediate period is reduced, and the air volume variable device is controlled by the indoor temperature sensor. If the damper is squeezed, it will fall below the minimum outside air volume required for ventilation. However, even if there is no heat load, for example, in cooling, if the supply air cooled by the temperature controller of the air conditioner is supplied, it is too cold. Then, in order to secure the minimum outside air volume, if the air volume variable device is throttled to the minimum outside air volume in some air conditioning zone, the set value of the supply air temperature is raised (this is called reset). Reflected in the control of the temperature controller. This is generally called load reset control. The supply air temperature variable calculation unit 25 has this load reset control function.

FIG. 10 is a flowchart showing an example of the supply air temperature variable calculation unit 25. The supply air temperature variable calculation unit 25 performs the following control.
1) There is an air-conditioning zone in which the return air upper limit allowable temperature excess time exceeds the return air upper limit allowable temperature excess allowable time in step S1, and in step S2, the return air lower limit allowable temperature excess time exceeds the return air lower limit allowable temperature excess allowable time. When it is determined that there is no air-conditioning zone that exceeds the temperature, that is, when it is determined that there is only an air-conditioning zone that is too hot, the supply air temperature is changed to a setting value that is a predetermined difference α lower than the current setting temperature. .
2) There is an air-conditioning zone in which the return upper limit allowable temperature excess time exceeds the return upper limit allowable temperature excess allowable time in step S1, and the return lower limit allowable temperature excess time exceeds the return lower limit allowable temperature in step S2. When it is determined that there is an air-conditioning zone that exceeds the allowable time, that is, when it is determined that there are both an air-conditioning zone that is too hot and an air-conditioning zone that is too cold, the supply air temperature is not changed and the current set value is not changed. To maintain.
3) In step S1, there is no air conditioning zone in which the return air upper limit allowable temperature excess time exceeds the return upper limit allowable temperature excess allowable time, and in step S3, the return lower limit allowable temperature excess time exceeds the return lower limit allowable temperature allowable time. When it is determined that there is an air-conditioning zone that exceeds the temperature, that is, when it is determined that there is only an air-conditioning zone that is too cold, the supply air temperature is changed to a set value that is higher by a predetermined difference α than the current set temperature. .
4) In step S1, there is no air conditioning zone in which the return air upper limit allowable temperature excess time exceeds the return upper limit allowable temperature excess allowable time, and in step S3, the return lower limit allowable temperature excess time exceeds the return lower limit allowable temperature. If it is determined that there is no air-conditioning zone that exceeds, that is, if it is determined that there is no air-conditioning zone that is too hot and air-conditioning that is too cold, the supply air temperature is set to a predetermined difference α from the current set temperature. Change to a lower setting.

  As shown in 4) above, when it is determined that there is neither an air conditioning zone that is too hot nor an air conditioning zone that is too cold, the supply air temperature is changed to a setting value lower than the current setting temperature. Since the temperature difference between the inlet and outlet air by the temperature regulator of the air conditioner can be further increased and the amount of heat that can be carried with the minimum outside air volume increases, the operation time of the small fans 12a, 12b, 12c is shortened, and The conveyance power is reduced.

  Further, the command from the zone start / stop calculation unit 24 shown in FIG. 6 is output to the simultaneous start / stop prevention calculation unit 26, and in the simultaneous start / stop prevention calculation unit 26, a start signal or a stop signal previously issued. Thus, a start delay signal or a stop delay signal is issued to all the air-conditioning zones, and a small blower provided for each air-conditioning zone is calculated so that the start signal or stop signal is not output to the small blower unless a predetermined time has elapsed. 12a, 12b, and 12c are started and stopped in order so that the small fans 12a, 12b, and 12c for each air-conditioning zone are not started or stopped at the same time.

  FIG. 11 is a flowchart showing an example of the simultaneous start / stop prevention calculation unit 26. Each state calculation of the state of zone 1 shown in step S1a, the state of zone 2 shown in step S2a, and the state of zone 3 shown in step S3a. In this case, a signal is generated every predetermined time, the state is calculated each time, and the process proceeds downstream. If the state of zone 1 shown in step S1a is startup, and no stop signal is input to step S1b shown on the left side of FIG. 11 and there is no zone 1 stop signal, control returns to step S1a and the startup is maintained. The From this state, when a stop signal is input to zone 1 in step S1b and there is a stop signal, the process proceeds to step S1c, but since there is no stop delay signal at this time, the process further proceeds to step S1d. A count of 30 seconds indicating a stop delay signal (the length of this stop delay signal can be arbitrarily set) is started to be sent to steps S1c, S2c, S3c, and a stop command is sent to the switch 30 in FIG. Then, the small fan 12a in the zone 1 is stopped.

  When the small blower 12a in the zone 1 is stopped, the state of the zone 1 in the step S1a is stopped. Therefore, as shown on the right side of FIG. 11, there is no activation signal in the zone 1 in the step S1b ′. Returns to step S1a and the stop is maintained.

  When the stop signal is input to the zone 2 of step S2b following the zone 1 from the start state of the zone 2 shown in step S2a and there is a stop signal, the process proceeds to step S2c, but in step S2c Since the stop delay signal from step S1d is given, there is a stop delay signal until 30 seconds elapse from the stop of zone 1, and the control returns to step S2a to maintain the start.

  When 30 seconds elapse, the stop delay signal in step S2c disappears, so the process proceeds to step S2d without a delay signal. For example, the count of starting to output the stop delay signal for 30 seconds to steps S1c, S2c, and S3c is started. The stop command is sent to the first switch 30 and the small blower 12b in the zone 2 is stopped. In this way, the stop of zone 3 is performed after at least 30 seconds from the stop of zone 2. Also, as shown on the right side of FIG. 11, even when each zone is activated from a stopped state, the control is performed in the same manner as when the above-described activated state is performed.

  Therefore, according to the simultaneous start / stop prevention calculation unit 26 of FIG. 11, the small blowers 12a, 12b, and 12c provided for each air conditioning zone are started or stopped in order by shifting by 30 seconds at the shortest.

  According to the simultaneous start / stop prevention calculation unit 26 described above, the small blowers 12a, 12b, and 12c are started and stopped by shifting the time for each air conditioning zone so that the start and stop are not performed simultaneously. Fluctuations in the pressure of the supply air SA due to the start / stop of the blowers 12a, 12b, and 12c are suppressed, so that the pressure can be stabilized also in the branch chamber 9 or the zone duct 14 having a small capacity.

FIG. 12 shows another example of the control device 22 shown in FIG. 6, and includes a schedule start / stop calculation unit 28 instead of the zone start / stop calculation unit 24 shown in FIG. Similarly to the zone start / stop calculation unit 24, the schedule start / stop calculation unit 28 includes an air conditioner activation signal, a return air detection temperature for each air conditioning zone, a return air upper limit allowable temperature and a return air lower limit allowable temperature for each air conditioning zone, In addition to the start-up mode being input, as shown in FIGS. 14 and 15, the start start times TR ₁ , TR ₂ ... Of each air conditioning zone are set, and the stop start times TS of each air conditioning zone are set. ₁ and TS ₂ ... Are set, and the current time is input.

Then, as shown in the control flow chart when one air conditioning zone is controlled by the schedule start / stop calculation unit 28 in FIG. 13, when the air conditioning is started, when there is a rising mode, the rising mode is set for a predetermined time. After performing the control to rapidly change the temperature of the air-conditioning zone to the set temperature, as shown in FIGS. 14 and 15, whether or not the return air detection temperature is equal to the return air upper limit allowable temperature in step S1. Is lower, that is, θ _{Ri (PV)} ≦ θ _{Hi (SP)} , and the return air detection temperature is equal to or higher than the lower limit allowable return air temperature in step S2, that is, θ _{Ri (PV)} ≧ If it is determined that θ _{Li (SP)} , the current time has passed the start start time TR _i in step S3, and if the stop start time TS _i has not been reached, the small blowers 12a and 12b are used. , 12c Are operated by a control to output the same activation signal as the current state, the time the current time is set by stopping a small blower 12a, 12b, and 12c at stop signal when it exceeds the stop starting time TS _i The start and operation of the small blowers 12a, 12b, and 12c are repeated. And it returns to step S1 for every predetermined time, and continues and performs the same calculation again, and controls.

  When the return air detection temperature becomes higher than the return air upper limit allowable temperature in step S1, the small blowers 12a, 12b, 12c corresponding to the air conditioning zone are forcibly started, and in step S2, the return air is returned. When the detected temperature falls below the return air lower limit allowable temperature, the small fans 12a, 12b, 12c corresponding to the air conditioning zone are forcibly stopped.

  According to the above-described air conditioning system of the present invention, the pressure in the branch chamber 9 or the zone duct 14 is constant so that the minimum outside air volume is supplied to each air conditioning zone when all the small fans 12a, 12b, 12c are stopped. The rotational speed of the blower fan 3 is controlled so as to maintain the pressure, and the small blowers 12a, 12b, 12c in each air conditioning zone are started and stopped based on the return air temperature of each air conditioning zone, or each air conditioning Start and stop small blowers 12a, 12b, and 12c in each air-conditioning zone by schedule rotation based on the zone start start time and stop start time, and secondarily based on the return air upper limit allowable temperature and return air lower limit allowable temperature Since each small blower 12a, 12b, 12c does not have an inverter, a temperature detection sensor, a controller, etc., it becomes a simple device configuration. Control is facilitated Te, can be reduced equipment cost of the control device.

  Furthermore, since the set temperature in the temperature controller 19 is changed on the basis of the return air temperature of each air conditioning zone by the supply air temperature variable calculation unit 25, the activation / deactivation of the small fans 12a, 12b, 12c in each air conditioning zone is performed. The number of stop operations and the operation time are reduced, so that the conveyance power of the small fans 12a, 12b, and 12c can be reduced.

  In addition, since simultaneous start / stop of the small fans 12a, 12b, 12c provided in each air-conditioning zone is prevented by the simultaneous start / stop prevention calculation unit, fluctuations in pressure in the branch chamber 9 or the zone duct 14 are suppressed. be able to.

  In addition, a pressure sensor is provided in the branch chamber or in the zone duct near the branch chamber to measure a pressure that is a standard for a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small fans are stopped. Therefore, in addition to the case where a pressure sensor can be provided by cutting the opening in the branch chamber in the case of a new installation, even when the work up to the branch chamber is classified as an existing construction range during renovation work, it is almost as large as the branch chamber. Since it can be measured and controlled in a zone duct in the vicinity of the branch chamber where the atmospheric pressure reference static pressure is equivalent, it can be applied to the anchor without taking time and effort.

  FIG. 16 shows another embodiment of the air conditioning system of the present invention. The ceiling chamber C corresponding to a part of the air conditioning zone is connected to the branch chamber 9 via the zone duct 14 and includes an inverter 31. The small air blower 32 is installed, the air outlet 13 communicating with the small air blower 32 is provided in the ceiling 4, and the detected indoor temperature of the indoor temperature sensor 33 provided in the air-conditioning target space A so as to correspond to the small air blower 32. A single controller 34 is provided that controls the rotational speed of the small blower 32 by adjusting the inverter 31 based on the above. As described above, the small blower 32 in which the temperature is controlled by independently controlling the rotation by the single controller 34 in a part of the air-conditioning zones is applied to a place where the room temperature of the air-conditioning target space A is particularly desired to be kept constant. Furthermore, this small blower 32 can be used in combination with the embodiment shown in FIGS.

  Moreover, in the said Example, although the case where the air-conditioning object space A was cooled was demonstrated, also when heating the air-conditioning object space A, a small air blower is stopped when it is hot, and a small air blower is started when it is cold, and it is too hot. When there is neither an air-conditioning zone nor an air-conditioning zone that is too cold, control is performed in the same manner as in the previous embodiment, except that the supply air temperature variable calculation unit sets the set temperature of the supply air temperature to a temperature higher than the current set value. be able to.

  The air conditioning system and the air conditioning method of the present invention are not limited to the above-described embodiments, and the case where the air conditioning target space is divided into three air conditioning zones has been described, but the number of air conditioning zones is not limited. Of course, other modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus 2 Temperature controller 3 Blower fan 8 Air supply duct 9 Branch chamber 12 Small blower 12a, 12b, 12c Small blower 14 Zone duct 16 Pressure controller 19 Temperature controller 22 Control apparatus 23 Return air temperature sensor 23a, 23b , 23c Return air temperature sensor 24 Zone start / stop calculator 25 Supply air temperature variable calculator 26 Simultaneous start / stop prevention calculator
27- hour measurement calculation unit 28 Schedule start / stop calculation unit 31 Inverter 32 Small blower 33 Indoor temperature sensor 34 Single controller A Air-conditioning target space

Claims (13)

The air-conditioning target space is divided into a plurality of air-conditioning zones, at least one small blower is arranged for each air-conditioning zone, an air conditioner having a temperature controller and a blower fan is connected to the branch chamber by an air supply duct, In the configuration in which the branch chamber and a small blower arranged for each air-conditioning zone are connected by a zone duct and connected to send temperature-controlled air supply from the small blower to a plurality of outlets arranged on the ceiling of each air-conditioning zone ,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and the return air temperature sensor responds based on the return air upper limit allowable temperature and return air lower limit allowable temperature and zone onset stop calculating unit to indicate the start and stop of a small blower of the air conditioning zone,
Even one of the return air detection temperatures from the return air temperature sensor for each of the plurality of air-conditioning zones from the zone start / stop calculation unit is higher than the return air upper limit allowable temperature or lower than the return air lower limit allowable temperature. A state signal is input, and a time measurement calculation unit that measures and calculates an excess time of the return air upper limit allowable temperature and / or an excess time of the return air lower limit allowable temperature;
Based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the excess allowable time of the return air upper limit allowable temperature and the return air lower limit allowable temperature of each preset air conditioning zone are set. A supply air temperature variable calculation unit that changes the set temperature in the temperature controller by comparison with the allowable excess time,
In the supply air temperature variable calculation unit,
If there are only air-conditioning zones that are too hot, that is, only air-conditioning zones that exceed the maximum allowable return air temperature, change the set temperature of the supply air temperature to a temperature lower than the current set value,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, if there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, or an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature is set. Keep the temperature at the current setpoint,
If there are only air-conditioning zones that are too cold, that is, only air-conditioning zones that exceed the allowable upper limit of return air lower limit temperature, change the set temperature of the supply air temperature to a temperature higher than the current set value,
If there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, if there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the upper limit of the return air lower limit temperature, the supply air temperature is set to the current setting value. Perform each calculation to change to a lower temperature
An air conditioning system that outputs to the temperature controller . The air-conditioning target space is divided into a plurality of air-conditioning zones, at least one small blower is arranged for each air-conditioning zone, an air conditioner having a temperature controller and a blower fan is connected to the branch chamber by an air supply duct, In the configuration in which the branch chamber and a small blower arranged for each air-conditioning zone are connected by a zone duct and connected to send temperature-controlled air supply from the small blower to a plurality of outlets arranged on the ceiling of each air-conditioning zone ,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and the return air temperature sensor responds based on the return air upper limit allowable temperature and return air lower limit allowable temperature A zone start / stop calculation unit for instructing start / stop of a small blower in an air-conditioning zone
Even one of the return air detection temperatures from the return air temperature sensor for each of the plurality of air-conditioning zones from the zone start / stop calculation unit is higher than the return air upper limit allowable temperature or lower than the return air lower limit allowable temperature. A state signal is input, and a time measurement calculation unit that measures and calculates an excess time of the return air upper limit allowable temperature and / or an excess time of the return air lower limit allowable temperature;
Based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the excess allowable time of the return air upper limit allowable temperature and the return air lower limit allowable temperature of each preset air conditioning zone are set. A supply air temperature variable calculation unit that changes the set temperature in the temperature controller by comparison with the allowable excess time,
In the supply air temperature variable calculation unit,
If there are only air-conditioning zones that are too hot, that is, only air-conditioning zones that exceed the maximum allowable return air temperature, change the set temperature of the supply air temperature to a temperature lower than the current set value,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, if there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, or an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature is set. Keep the temperature at the current setpoint,
If there are only air-conditioning zones that are too cold, that is, only air-conditioning zones that exceed the allowable upper limit of return air lower limit temperature, change the set temperature of the supply air temperature to a temperature higher than the current set value,
If there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, if there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the upper limit of the return air lower limit temperature, the supply air temperature is set to the current setting value. Perform each calculation to change to a higher temperature
An air conditioning system that outputs to the temperature controller. The air-conditioning target space is divided into a plurality of air-conditioning zones, at least one small blower is arranged for each air-conditioning zone, an air conditioner having a temperature controller and a blower fan is connected to the branch chamber by an air supply duct, In the configuration in which the branch chamber and a small blower arranged for each air-conditioning zone are connected by a zone duct and connected to send temperature-controlled air supply from the small blower to a plurality of outlets arranged on the ceiling of each air-conditioning zone ,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature ;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and set the return air upper limit allowable temperature, return air lower limit allowable temperature set for each air conditioning zone, And a schedule start / stop calculation unit for instructing start / stop by a schedule rotation of the small blower in each air conditioning zone corresponding to the return air temperature sensor based on the start start time and the stop start time;
One of the return air detection temperatures from the return air temperature sensor for each of the plurality of air conditioning zones from the schedule start / stop calculation unit is higher than the return air upper limit allowable temperature or lower than the return air lower limit allowable temperature. A state signal is input, and a time measurement calculation unit that measures and calculates an excess time of the return air upper limit allowable temperature and / or an excess time of the return air lower limit allowable temperature;
Based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the excess allowable time of the return air upper limit allowable temperature and the return air lower limit allowable temperature of each preset air conditioning zone are set. A supply air temperature variable calculation unit that changes the set temperature in the temperature controller by comparison with the allowable excess time,
In the supply air temperature variable calculation unit,
If there are only air-conditioning zones that are too hot, that is, only air-conditioning zones that exceed the maximum allowable return air temperature, change the set temperature of the supply air temperature to a temperature lower than the current set value,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, if there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, or an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature is set. Keep the temperature at the current setpoint,
If there are only air-conditioning zones that are too cold, that is, only air-conditioning zones that exceed the allowable upper limit of return air lower limit temperature, change the set temperature of the supply air temperature to a temperature higher than the current set value,
If there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, if there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the upper limit of the return air lower limit temperature, the supply air temperature is set to the current setting value. Perform each calculation to change to a lower temperature
An air conditioning system that outputs to the temperature controller . The air-conditioning target space is divided into a plurality of air-conditioning zones, at least one small blower is arranged for each air-conditioning zone, an air conditioner having a temperature controller and a blower fan is connected to the branch chamber by an air supply duct, In the configuration in which the branch chamber and a small blower arranged for each air-conditioning zone are connected by a zone duct and connected to send temperature-controlled air supply from the small blower to a plurality of outlets arranged on the ceiling of each air-conditioning zone ,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and set the return air upper limit allowable temperature, return air lower limit allowable temperature set for each air conditioning zone, And a schedule start / stop calculation unit for instructing start / stop by a schedule rotation of the small blower in each air conditioning zone corresponding to the return air temperature sensor based on the start start time and the stop start time;
One of the return air detection temperatures from the return air temperature sensor for each of the plurality of air conditioning zones from the schedule start / stop calculation unit is higher than the return air upper limit allowable temperature or lower than the return air lower limit allowable temperature. A state signal is input, and a time measurement calculation unit that measures and calculates an excess time of the return air upper limit allowable temperature and / or an excess time of the return air lower limit allowable temperature;
Based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the excess allowable time of the return air upper limit allowable temperature and the return air lower limit allowable temperature of each preset air conditioning zone are set. A supply air temperature variable calculation unit that changes the set temperature in the temperature controller by comparison with the allowable excess time,
In the supply air temperature variable calculation unit,
If there are only air-conditioning zones that are too hot, that is, only air-conditioning zones that exceed the maximum allowable return air temperature, change the set temperature of the supply air temperature to a temperature lower than the current set value,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, if there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, or an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature is set. Keep the temperature at the current setpoint,
If there are only air-conditioning zones that are too cold, that is, only air-conditioning zones that exceed the allowable upper limit of return air lower limit temperature, change the set temperature of the supply air temperature to a temperature higher than the current set value,
  If there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, if there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the upper limit of the return air lower limit temperature, the supply air temperature is set to the current setting value. Perform each calculation to change to a higher temperature
An air conditioning system that outputs to the temperature controller.   Even if the control device outputs a start / stop instruction from the zone start / stop operation unit or the schedule start / stop operation unit substantially simultaneously in a plurality of air conditioning zones, simultaneous start / stop of the small fans provided for each air conditioning zone 5. The air conditioning system according to claim 1, further comprising: a simultaneous start / stop prevention calculation unit that prevents a failure.   In the air conditioning target space, a ceiling chamber is provided as a return air path for returning the return air from the air conditioning target space to the air conditioner, and the branch chamber, the zone duct, the small blower, and a plurality of air conditioners are provided in the ceiling chamber The air conditioning system according to any one of claims 1 to 5, further comprising a return air temperature sensor for each zone.   A room temperature sensor for detecting a room temperature is provided in a part of the air-conditioning zone, and the part of the air-conditioning zone has a small size based on a room detected temperature from the room temperature sensor instead of the control device. The air conditioning system according to any one of claims 1 to 6, further comprising a single controller that controls the rotational speed of the blower. The air-conditioning target space is divided into a plurality of air-conditioning zones, at least one small blower is arranged for each air-conditioning zone, an air conditioner having a temperature controller and a blower fan is connected to the branch chamber by an air supply duct, In the configuration in which the branch chamber and a small blower arranged for each air-conditioning zone are connected by a zone duct and connected to send temperature-controlled air supply from the small blower to a plurality of outlets arranged on the ceiling of each air-conditioning zone ,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and the return air temperature sensor responds based on the return air upper limit allowable temperature and return air lower limit allowable temperature A zone start / stop calculation unit for instructing start / stop of a small blower in an air-conditioning zone
Input each return air detection temperature from the return air temperature sensor for each of the plurality of air conditioning zones, and based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the temperature A variable supply air temperature calculation unit for changing the set temperature in the controller;
An air conditioning method for cooling using an air conditioning system having
In each air conditioning zone, the excess allowable time of the return air upper limit allowable temperature and the excess allowable time of the return air lower limit allowable temperature are set in the control device in advance,
When there is only an air-conditioning zone that is too hot, that is, only an air-conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, the supply air temperature variable calculation unit sets the supply air temperature to a temperature lower than the current set value. change,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, when there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, and an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature variable calculation To maintain the set temperature of the supply air temperature at the current set value,
When there are only air-conditioning zones that are too cold, that is, there are only air-conditioning zones that exceed the allowable upper limit of the return air lower limit temperature, the supply air temperature can be set higher than the current set value by the variable air supply temperature calculator. change,
When there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the lower limit of the return air, the supply air temperature variable calculation unit An air conditioning method characterized in that the set temperature is changed to a temperature lower than the current set value. The air-conditioning target space is divided into a plurality of air-conditioning zones, at least one small blower is arranged for each air-conditioning zone, an air conditioner having a temperature controller and a blower fan is connected to the branch chamber by an air supply duct, In the configuration in which the branch chamber and a small blower arranged for each air-conditioning zone are connected by a zone duct and connected to send temperature-controlled air supply from the small blower to a plurality of outlets arranged on the ceiling of each air-conditioning zone ,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and set the return air upper limit allowable temperature, return air lower limit allowable temperature set for each air conditioning zone, And a schedule start / stop calculation unit for instructing start / stop by a schedule rotation of the small blower in each air conditioning zone corresponding to the return air temperature sensor based on the start start time and the stop start time;
Input each return air detection temperature from the return air temperature sensor for each of the plurality of air conditioning zones, and based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the temperature A variable supply air temperature calculation unit for changing the set temperature in the controller;
An air conditioning method for cooling using an air conditioning system having
In each air conditioning zone, the excess allowable time of the return air upper limit allowable temperature and the excess allowable time of the return air lower limit allowable temperature are set in the control device in advance,
When there is only an air-conditioning zone that is too hot, that is, only an air-conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, the supply air temperature variable calculation unit sets the supply air temperature to a temperature lower than the current set value. change,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, when there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, and an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature variable calculation To maintain the set temperature of the supply air temperature at the current set value,
When there are only air-conditioning zones that are too cold, that is, there are only air-conditioning zones that exceed the allowable upper limit of the return air lower limit temperature, the supply air temperature can be set higher than the current set value by the variable air supply temperature calculator. change,
When there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the lower limit of the return air, the supply air temperature variable calculation unit An air conditioning method characterized in that the set temperature is changed to a temperature lower than the current set value. The air-conditioning target space is divided into a plurality of air-conditioning zones, at least one small blower is arranged for each air-conditioning zone, an air conditioner having a temperature controller and a blower fan is connected to the branch chamber by an air supply duct, In the configuration in which the branch chamber and a small blower arranged for each air-conditioning zone are connected by a zone duct and connected to send temperature-controlled air supply from the small blower to a plurality of outlets arranged on the ceiling of each air-conditioning zone ,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and the return air temperature sensor responds based on the return air upper limit allowable temperature and return air lower limit allowable temperature A zone start / stop calculation unit for instructing start / stop of a small blower in an air-conditioning zone
Input each return air detection temperature from the return air temperature sensor for each of the plurality of air conditioning zones, and based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the temperature A variable supply air temperature calculation unit for changing the set temperature in the controller;
An air conditioning method for cooling using an air conditioning system having
In each air conditioning zone, the excess allowable time of the return air upper limit allowable temperature and the excess allowable time of the return air lower limit allowable temperature are set in the control device in advance,
When there is only an air-conditioning zone that is too hot, that is, only an air-conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, the supply air temperature variable calculation unit sets the supply air temperature to a temperature lower than the current set value. change,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, when there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, and an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature variable calculation To maintain the set temperature of the supply air temperature at the current set value,
When there are only air-conditioning zones that are too cold, that is, there are only air-conditioning zones that exceed the allowable upper limit of the return air lower limit temperature, the supply air temperature can be set higher than the current set value by the variable air supply temperature calculator. change,
When there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the lower limit of the return air, the supply air temperature variable calculation unit An air conditioning method characterized in that the set temperature is changed to a temperature higher than the current set value. The air-conditioning target space is divided into a plurality of air-conditioning zones, at least one small blower is arranged for each air-conditioning zone, an air conditioner having a temperature controller and a blower fan is connected to the branch chamber by an air supply duct, In the configuration in which the branch chamber and a small blower arranged for each air-conditioning zone are connected by a zone duct and connected to send temperature-controlled air supply from the small blower to a plurality of outlets arranged on the ceiling of each air-conditioning zone ,
The rotation speed of the blower fan is controlled so that the pressure in the branch duct or in the zone duct in the vicinity of the branch chamber maintains a constant pressure at which the minimum outside air volume is supplied to each air-conditioning zone when all small blowers are stopped. A pressure controller to
A temperature controller for controlling the temperature regulator so that the supply air temperature in the supply duct is maintained at a set temperature;
A control device,
The controller is
Input the return air detection temperature from the return air temperature sensor for each air conditioning zone that detects the return air temperature of each air conditioning zone, and set the return air upper limit allowable temperature, return air lower limit allowable temperature set for each air conditioning zone, And a schedule start / stop calculation unit for instructing start / stop by a schedule rotation of the small blower in each air conditioning zone corresponding to the return air temperature sensor based on the start start time and the stop start time;
Input each return air detection temperature from the return air temperature sensor for each of the plurality of air conditioning zones, and based on the excess time of the return air upper limit allowable temperature and / or the excess time of the return air lower limit allowable temperature, the temperature A variable supply air temperature calculation unit for changing the set temperature in the controller;
An air conditioning method for cooling using an air conditioning system having
In each air conditioning zone, the excess allowable time of the return air upper limit allowable temperature and the excess allowable time of the return air lower limit allowable temperature are set in the control device in advance,
When there is only an air-conditioning zone that is too hot, that is, only an air-conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, the supply air temperature variable calculation unit sets the supply air temperature to a temperature lower than the current set value. change,
When there is an air conditioning zone that is too hot and an air conditioning zone that is too cold, that is, when there is an air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature, and an air conditioning zone that exceeds the allowable upper limit of the return air lower limit temperature, the supply air temperature variable calculation To maintain the set temperature of the supply air temperature at the current set value,
When there are only air-conditioning zones that are too cold, that is, there are only air-conditioning zones that exceed the allowable upper limit of the return air lower limit temperature, the supply air temperature can be set higher than the current set value by the variable air supply temperature calculator. change,
When there is neither an air conditioning zone that is too hot or an air conditioning zone that is too cold, that is, there is no air conditioning zone that exceeds the allowable upper limit of the return air upper limit temperature or the lower limit of the return air, the supply air temperature variable calculation unit An air conditioning method characterized in that the set temperature is changed to a temperature higher than the current set value.   6. An air conditioning method for performing air conditioning using the air conditioning system according to claim 5, wherein the simultaneous start / stop prevention computing unit starts up in advance so that the start / stop of the small blowers provided for each air conditioning zone does not overlap. A start delay signal or stop delay signal is issued to each air conditioning zone by a signal or stop signal, and is calculated so that the start signal or stop signal is not output to a small blower unless a predetermined time has elapsed. An air conditioning method characterized by controlling the start and stop of a small blower provided.   An air conditioning method for performing air conditioning using the air conditioning system according to claim 7, wherein the number of revolutions of the small blower is controlled by a single controller that inputs the room temperature of room temperature sensors provided in some air conditioning zones. The air-conditioning method of controlling so that the indoor temperature of the air-conditioning zone of a part may be kept constant.

Images