JPS6023262B2 - Indoor pressure control method for air conditioning - Google Patents

Description

Detailed Description of the Invention The present invention relates to a method for controlling the internal pressure of a room to be air conditioned in an air conditioning method that actively takes in outside air. In rooms where yarn is subjected to post-processing such as twisting, stretching, heating, and crimping, the temperature and humidity conditions are subject to constant changes, and changes in temperature and humidity conditions greatly affect the quality of the products obtained. This invention relates to a method for controlling the air pressure in a room where a considerable amount of air is actively supplied and returned, and where it is essential to introduce fresh air.

Generally, the air conditions for such a room are severe, and in order to prevent unconditioned air from entering through the opening and closing of the door installed at the entrance, it is necessary to maintain the indoor air pressure at a positive temperature. If the pressure is too large, the flow velocity of the passing air when opening and closing the door will become excessive due to the pressure difference between the indoor and outdoor areas, causing various problems, so it is necessary to maintain the pressure at a slightly positive pressure.

However, in the above-mentioned textile processing room, it is necessary to forcibly exhaust a portion of the indoor air in order to apply oil to the threads, remove generated dust, etc. It is necessary to introduce fresh air into the air conditioner. Conventionally, the method of controlling the indoor pressure in the room described above has been the simplest method of unconditionally taking in extra outside air. When exhausting air using an exhaust fan and an exhaust damper provided in the machine, the indoor pressure is controlled by adjusting the degree of the exhaust damper.

However, in this method, even when the enthalpy of the outside air is larger than the enthalpy of the indoor air, that is, when performing air conditioning without taking in outside air as much as possible will save the thermal power required for air conditioning, the surplus outside air cannot be removed. This results in an increase in the cooling load,
It has the disadvantage of being uneconomical. For example, when the enthalpy of the outside air is larger than the enthalpy of the air in the room, as in the summer, it is economical to intake the outside air to a minimum of 4. There is no need to exhaust air from the air conditioner. In addition, if the enthalpy of the outside air is 4.0 times higher than the enthalpy of the air in the room, it is economical to actively introduce outside air, but in this case, the most economical amount of outside air introduced is When the amount required is less than the amount forcedly exhausted from the room (for example, during severe cold season)
In this case, there is no need to exhaust air from an air conditioner, as it is only necessary to take in the amount of outside air that is required for indoor pressure control.
The conventional method of introducing a large amount of excess outside air for ease of operation has a major problem in this respect. The present invention solves the above problems and provides a new method for controlling the air pressure in a room subject to air conditioning by effectively introducing the necessary minimum amount of outside air into the temperature/humidity control supervisor. This system actively takes in outside air using an air conditioner equipped with an outside air damper that introduces outside air, a return air damper that accepts return air from the controlled room, and an exhaust damper that releases the lighting directly to the outside.
In the air conditioning method, the return air is adjusted while adjusting the opening degrees of the three dampers, and the returned air is sent to the target room again.
A detector for detecting the pressure in the target room and a drive mechanism for the three dampers are each connected to a computer, and when exhaust is exhausted from the air conditioner, the function of the exhaust damper is adjusted according to the detected pressure of the air detector. The gist is to control the indoor pressure in the target room to a preset pressure by adjusting the eel point or by preferentially adjusting the outside air damper when the air conditioner does not exhaust air. be.

The method of the present invention will be specifically explained below using examples.

First, the configuration of an apparatus for carrying out the method of the present invention will be explained. In the figure, M indicates an air conditioner, and the air conditioner M includes an air washer 1, a cooling coil 2, a heating coil 3, Humidifiers 4 are arranged, and an air supply duct S that communicates with a room 10 is installed beyond the humidifiers 4.

In the introduction part 17 located at the end of the air conditioner M, there is an outside air damper 5 which passes through the atmosphere and introduces outside air, and between the introduction part 17 and the return air duct R there is a return air damper 6. An exhaust damper 7 is installed on the side wall of the end portion of the air duct R.
Drive motors 14, 1 that open and close each of these dampers
5 and 16 are connected to a computer 13, which is a central control mechanism, through a known electric circuit. A local exhaust row 2 for forcibly exhausting a part of the indoor air is installed at an appropriate position in the room, and a local exhaust fan 11 is installed at the closed end of the opening 12.
is installed. In the composition, 9 is an exhaust fan that forcibly sucks indoor air and moves it to the inlet 17 side of the air conditioner;
8 is an air supply fan of air conditioner M; 18 is an indoor pressure detector whose measurement terminal is located indoors; this detector 18 is connected to the computer 13 through a known electric circuit to notify the detected pressure. It's useful. The air conditioning method of taking in outside air in the device of the embodiment configured as described above is to mix the return air and outside air, then adjust the temperature and humidity using the chair washer, the cooling coil 2, the heating coil 3, and the humidifier 4, and then send the air. Air is supplied to the chamber 10 by an air fan 8.

A portion of the air supplied to the chamber 10 is forcibly exhausted from the local exhaust row 2, but most of it passes through the chamber 10.
The air is exhausted out of the room 10 by the exhaust fan 9, and part of the air is returned to the atmosphere via the exhaust damper 7, while the other air is circulated again as return air. In the air conditioning method for taking in outside air as described above, the method of the present invention for controlling the indoor pressure of the room 10 is carried out as follows.

That is, the computer 13 equipped with the input/output device as described above has room 1.
The indoor pressure detected by the indoor pressure detector 18 installed in 01 is always inputted, and the computer 13 is used to drive the outside air damper 5, the return air damper 6, and the exhaust damper 7. Motor (e.g. Yamatake Honeywell,
It is designed so that operation signals can be output to geomotor models C-8006) 14, 15, and 16. First of all, air conditioner M
A method of controlling indoor pressure in a case where exhaust gas is not exhausted will be explained. A fully closing operation signal is outputted from the computer 13 to the exhaust damper drive motor 16, and the exhaust damper 7 is fully closed.

On the other hand, the indoor pressure of the room 10 input to the computer 13 is compared with a predetermined desired target indoor pressure, and if the indoor pressure is higher than the target indoor pressure, the amount of outside air intake is reduced, and vice versa. If the indoor pressure is low, an operation signal is output to the outside air damper driving motor 14 and the return air damper driving motor 15 to increase the outside air intake, thereby driving the outside air damper 5 and the return air damper 6. control. That is, the entire amount of air sent into the air conditioner M by the exhaust fan 9 is used as return air, and the necessary minimum amount of outside air is taken in, which is approximately equivalent to the amount that is forcibly exhausted from the local exhaust port 12 of the room 10. This is to control the indoor pressure. Following the process in which it is advantageous for air conditioning to increase the amount of outside air introduced from the above-mentioned situation, the amount of outside air introduced finally becomes superior to the forced exhaust amount, and it becomes necessary to exhaust air from air conditioner M to adjust the indoor pressure. Become.

In this case, the method of the present invention controls the indoor pressure as follows. Room 1 input from room pressure detector 14 by computer 13
'0 indoor pressure and a preset indoor pressure are compared, and an operation signal is output to the exhaust damper drive motor 16 to adjust the exhaust damper 7 so that the indoor pressure of the chamber 10 becomes the target indoor pressure. Controls indoor pressure.

That is, when the indoor pressure of the chamber 10 is higher than the target indoor pressure, it is necessary to increase the exhaust volume, and the exhaust damper driving motor 16 is controlled by the computer 1 so as to further open the exhaust damper 7.
3 outputs an operation signal. Conversely, when the indoor pressure of the chamber 10 is lower than the standard indoor pressure, it is necessary to reduce the exhaust volume, and the computer 13 outputs an operation signal to the exhaust damper drive motor 6 to close the exhaust damper 7. The method of the present invention is carried out as described above, and in an air conditioner that actively takes in outside air, it is possible to accurately control the indoor pressure even if the room being air-conditioned by the air conditioner is forcibly evacuated. can.

Naturally, the method of the present invention can also be applied to rooms that are not forced to be exhausted; in this case, the indoor pressure can be controlled simply by adjusting the exhaust damper, similar to the condition in which exhaust is exhausted from the air conditioner M described above. . As described above, according to the method of the present invention, even if the room 10 that is the subject of air conditioning control in an air conditioner that actively takes in outside air is forcibly evacuated by equipment other than the air conditioner M, the room When the enthalpy of outside air is greater than the air enthalpy of room 10, such as in the summer, the indoor pressure is controlled by taking in the minimum amount of outside air, and the enthalpy of outside air is If the air enthalpy is smaller than 10 and the optimal amount of outside air intake at that time is less than the amount that is forcibly exhausted from room 10, take in more outside air than the most economical amount of outside air intake in terms of indoor pressure control. However, even in that case, there is an effect that the indoor pressure of the room 10 can be controlled economically by introducing the minimum amount of outside air necessary for indoor pressure control.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of an apparatus for carrying out the method of the present invention. 1...airwasher, 2...cooling coil,
3... Heating coil, 4... Humidifier, 5...
...Outside air damper, 6...Far air damper, 7...
Exhaust damper, 8... Air supply fan, 9...
・Exhaust fan, 10... Room, 11... Local exhaust fan, 12... Local exhaust port, 13...
・Computer, 14-16... Drive motor for damper opening/closing, 17... Introduction section, 18... Detector, M... Air conditioner, S ... Air supply duct, R ... Return air duct. Math 1 figure

Claims (1)

[Claims] 1. An air conditioner equipped with an outside air damper that introduces outside air, a return air damper that accepts return air from the controlled room, and an exhaust damper that releases the return air directly to the outside, actively takes in outside air, and In the air conditioning method, a detector for detecting the pressure in the target chamber and a drive mechanism for the three dampers are connected to a computer, respectively, in an air conditioning method in which return air is adjusted while adjusting the opening degree of the chamber, and is sent to the target chamber again. When exhausting air from the air conditioner, the opening degree of the exhaust damper is adjusted preferentially according to the pressure detected by the detector, and when the air conditioner is not exhausting air, the opening degree of the outside air damper is adjusted preferentially. An indoor pressure control method for air conditioning, characterized in that the indoor pressure of the target room is controlled to a preset pressure.