JPH0633898B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention arranges a large number of heat sources such as office automation equipment such as office automation buildings and intelligent buildings that are office automation. Therefore, the present invention relates to an air conditioner suitable for a building in which the amount of heat generated from them is large and the state of the heat source at each location changes frequently.
By operating the air conditioning motors such as the air supply fan motors, the exhaust fan motors, the pump motors for circulating cold / hot water according to the state of the heat source at each location, the environment in the air conditioning target space can be kept constant. The present invention relates to an air conditioner that is maintained in a good environment.

(Prior Art) As a conventional air conditioner, air-supply dampers whose opening degree is automatically changed according to the temperature of the air-conditioning space are provided at a plurality of locations in an air-conditioned space, and each air-supply damper is connected via an air duct. Common 1
It is known to connect to individual air conditioners to cool and heat the space to be air-conditioned.

(Problems to be Solved by the Invention) However, the above-mentioned conventional one controls the opening degree of each air supply damper to obtain a desired amount of heat from each air supply port toward a heat source at each location corresponding thereto. Cooling air was supplied to maintain a good environment with a substantially uniform temperature throughout the air-conditioned space.However, since the rotation speed of the air supply fan of the main air conditioner is constant, the power cost exceeds the air conditioning load. It was a thing.

(Means for Solving the Problems) According to the present invention, when the opening degree of each air supply damper automatically changes according to the temperature of the location, the rotation speed of the air conditioning motor can be immediately controlled accordingly. In addition to eliminating the inconvenience of the above conventional apparatus, it is possible to provide an air conditioner capable of ensuring the balance of air returning from the perimeter zone to the air conditioner side. Each air supply damper is equipped with an air supply damper whose opening automatically changes according to the detected temperature sensor signal, and each air supply damper is connected to a common air conditioner via an air duct to create an air-conditioned space. An auxiliary air conditioner is provided for cooling and heating, and an upper air outlet is provided in the perimeter zone of the space to be air conditioned, and return air from the auxiliary air conditioner is provided with a suction port facing the air outlet of the auxiliary air conditioner. And blast The air supply from the main air conditioner to the mixing chamber via an air duct having an air conditioner and a bypass valve and a mixing valve, and the air supply mixed in the mixing chamber is supplied to the perimeter. In the air conditioner adapted to return to the zone, each air supply damper is provided with an opening sensor that detects the opening thereof, and the air conditioning motor of the air conditioner is operated in accordance with the outputs from the temperature sensors and the total opening sensor. A control means for controlling the rotation speed and the opening degree of the bypass valve and the mixing valve is provided.

(Operation) The present invention is based on the above-mentioned configuration. According to this, the state of the heat source at each location changes, the temperature at each location changes accordingly, and the opening degree of each air supply damper automatically changes. When there is a change, the opening state of each air supply damper is immediately detected by each opening sensor, and the rotation speed of the air conditioning motor is controlled without a time lag in accordance with the output from all the opening sensors. The desired amount of cold air is supplied toward the heat source at each location corresponding to the above condition, and the entire air-conditioned space is maintained in a good environment with a substantially uniform temperature. In the perimeter zone, depending on the amount of cold air supplied from the main air conditioner to the mixing chamber, a part of the return air returning to the mixing chamber can be released by a bypass valve, and the total amount of air flowing into the mixing chamber The amount of air discharged from the mixing chamber can be balanced, and the amount of return air from the fan unit, which is an auxiliary air conditioner, and the amount of air collected in the duct can be balanced.

(Embodiment) Next, an embodiment in which the present invention is applied to a building for office automation which has been made into office automation will be described with reference to the drawings.

Figure 1 is a cross-sectional view of one floor, which is the space to be air-conditioned, viewed from the north or south side. (1) is an air supply damper installed in the ceiling of the interior zone where heat sources such as OA equipment are concentrated. 2) shows the air supply dampers installed on the ceiling of the perimeter zone, and all of these air supply dampers are temperature sensors.
(3) is provided, and the opening degree is automatically controlled according to the magnitude of the output from the temperature sensor (3).

An upper air conditioner fan coil unit as an auxiliary air conditioner is installed under the east window and under the west window in the perimeter zone, respectively.
(4) is provided.

All of the above air supply dampers are air ducts as shown in Fig. 2.
It is connected to one external common air conditioner (6) via (5), but the air supply damper (2) in the perimeter zone is connected to the main air conditioner 6
A mixing chamber (8) equipped with a mixing valve (7) is installed in the air duct connected to the mixing chamber (8).
The blow-out port (13) of the fan coil unit (4) is opposed to the suction port (12) of the mixing air duct (11) extending from the blower (9) and the bypass valve (10). .

When doing so, the cool air from the main air conditioner (6) is directly supplied to the interior zone air supply damper (1) via the air duct (5b).
It is sent to a heat source such as OA equipment through the cooling system to cool it and from the mixing chamber (8) that mixes the cool air from the main air conditioner (6) with the return air from the fan coil unit (4). The cool air is sent to the perimeter zone via the air duct (5a), the skin load is removed, and the inside of the floor is maintained in a good environment with a substantially uniform temperature.

However, despite the sudden change in heat generation due to the simultaneous use of all OA equipment on one floor and the extreme decrease in the number of people on one floor due to the end of working hours, the main air conditioner
Mainly in (6), when the rotation speed of the air supply fan (17) motor is kept constant, the change in the amount of heat generated by each temperature sensor (3) is detected and all air supply dampers are automatically operated. The desired opening corresponding to the new calorific value is achieved, but the main air conditioner (6)
The air supply fan is operated unnecessarily due to the pulsation and compression of the air in the duct, and the desired amount of cool air cannot be obtained from each air supply damper, and the inside of the floor does not reach a uniform temperature and the set temperature. Is not preferable.

Therefore, in the present invention, each air supply damper is provided with an opening sensor (14) such as a resolver and a rotary potentiometer, and the air conditioning of the air conditioner is performed according to the outputs of these opening sensors (14) (14). By controlling the motor for the motor, the floor temperature is maintained at the set temperature, and energy-saving operation of the air supply fan of the main air conditioner (6) can be performed.To further explain, the opening sensor (14) ( 14) ... and the output of the temperature sensor (3) (3) ... via the local controller (15) (15) for relaying the temperature sensor (3) and the full opening sensor ( According to the output from 4), the control microcomputer (16) as a control means for controlling the rotation speed of the air conditioning motor of the air conditioner and the opening degree of the bypass valve (10) and the mixing valve (7). Then, when the amount of heat generated is changed by the control microcomputer (16), the air conditioner of the main air conditioner (6), for example, the air supply flow By changing the rotational speed of the motor of Anne (17) and changing the opening of the mixing valve (7) and the bypass valve (10), even if there is no time lag due to the change in the amount of heat generation, each A desired amount of cool air can be obtained from the air supply damper (1) so that the inside of the floor can always be maintained at a substantially uniform temperature and a good environment of the set temperature.In the perimeter zone, the mixing chamber (6) from the main air conditioner (6) can be maintained. Depending on the amount of cold air supplied to the mixing chamber (12), part of the return air returning to the mixing chamber (12) can be released by the bypass valve (1),
It is possible to balance the total amount of air that flows into (12) and the amount of air that exits from the mixing chamber (12), and the amount of return air from the fan unit (4) that is an auxiliary air conditioner and the amount of air collected in the duct (12). The amount of air can be balanced.

In FIG. 2, (18) is an exhaust damper provided in the exhaust duct (19), (20) is an anemometer, and (21) is an outside air intake duct (22).
The outside air damper installed in the air conditioner, (23) the cooling coil in the main air conditioner (6), (24) the cold water valve connected to the cold water pipe (25) connected to the cooling coil (23), and (26) the main Heating coil in air conditioner (6), (27)
Is a hot water valve installed in the hot water pipe (28) connected to the heating coil (26), and (29) is a transistor inverter that changes the rotation speed of the air supply fan (17) motor. ), Outside air damper (21), cold water valve (24) and hot water valve (27)
And the frequency of the transistor inverter (29) are controlled by the control microcomputer (16) or the central monitoring computer (30) connected thereto.

In the above embodiment, the case of cooling is described, but it is applicable to the case of heating.

(Effect of the invention) As described above, according to the present invention, the opening of the air supply damper whose opening automatically changes according to the temperature is constantly detected by the quick-responsive opening sensor, and the opening sensor is used to detect the opening. The air-conditioning motor of the air-conditioner is controlled according to the output of the air-conditioning system, so no matter how the amount of heat generated in the air-conditioned space changes, the time lag is longer than that of the conventional one in which the rotation speed of the air-conditioning motor is constant. It is possible to save power by operating the air supply fan of the main air conditioner to supply only the amount of air required momentarily while maintaining a good environment with a substantially uniform temperature and set temperature in the space. Moreover, in the perimeter zone, the openings of the bypass valve and the mixing valve are controlled according to the outputs from the temperature sensors and the total opening sensors, so that it is possible to adjust the opening degree of the cool air supplied from the main air conditioner to the mixing chamber. The mixing A part of the return air returning to the chamber can be released by the bypass valve, the total amount of air flowing into the mixing chamber and the amount of air exiting the mixing chamber can be balanced, and the amount of return air from the fan coil unit can be balanced. The effect is that the amount of air collected in the duct can be balanced.

[Brief description of drawings]

FIG. 1 is an explanatory view of one floor showing an example of an embodiment in which the present invention is applied to an office automation building for office automation, and FIG. 2 includes a control system of the embodiment of FIG. FIG. (1) (2) …… Air supply damper, (3) …… Temperature sensor (5) (5a) (5b) …… Air duct (6) …… Main air conditioner (Air conditioner) (14) …… Open Degree sensor (16) ... Microcomputer for control

Claims (1)

[Claims] 1. An air supply damper whose opening degree is automatically changed in response to a signal from each temperature sensor for detecting the temperature at a plurality of ceiling portions in an air-conditioned space, and each air supply damper is provided. Is connected to one common air conditioner via an air duct to cool and heat the air-conditioned space, and an upper air-conditioning auxiliary air-conditioner is provided in the perimeter zone of the air-conditioned space. The return air from the machine is guided to the mixing chamber via an air duct having a suction port facing the outlet of the auxiliary air conditioner and having a blower and a bypass valve interposed, and from the main air conditioner via a mixing valve. In the air conditioner configured to guide the supply air to the mixing chamber and return the supply air mixed in the mixing chamber to the perimeter zone, each supply damper is provided with an opening sensor for detecting the opening. An air conditioner comprising control means for controlling the number of revolutions of the air conditioning motor of the air conditioner and the openings of the bypass valve and the mixing valve according to the outputs from the temperature sensors and the total opening sensor. apparatus.