JPH0217367A - air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner for both hot water heating and cooling using refrigerant circulation, and particularly relates to comfortable dehumidification-based operation.

[Conventional technology]

Some conventional dehumidification-based operations control a refrigerant circulation type refrigeration cycle without using a hot water heat exchanger.

In other words, the refrigerant compressor is repeatedly operated and stopped at predetermined intervals of, for example, 3 to 4 minutes, and at the same time, the indoor blower is also rotated at a lower speed than during normal cooling operation to reduce the cooling capacity, thereby reducing the temperature of the cooling heat exchanger. There is a configuration in which dehumidification is the main function by lowering the air conditioner and increasing the cooling proficiency.

In addition, related to this type of technology is the
There is No. 152575.

[Problem to be solved by the invention]

In dehumidification-based operation with this configuration, the air that has been cooled and dehumidified by the cooling heat exchanger is discharged from the indoor unit without being reheated, so the discharge air temperature is as low as that during normal cooling, resulting in a cold feeling. There was a problem that it was not comfortable.

Furthermore, since the compressor repeatedly starts and stops, there is a problem in that the heat absorption capacity of the cooling heat exchanger is smaller than in normal cooling operation, that is, the amount of dehumidification is small. Furthermore, the operation of the compressor,
There is a problem in that the reliability of the compressor itself and the reliability of the switching electric circuit for turning on and off the compressor motor deteriorate due to repeated stops. Furthermore, there is a problem in that it is not possible to control the temperature of the discharged air to be lower or higher than that of the intake air.

The object of the present invention is to solve these problems, ensure the same amount of dehumidification as during normal cooling operation, and provide comfortable dehumidification-based operation without the feeling of cold air. Another object of the present invention is to obtain dehumidification-based operation with a configuration that does not reduce the reliability of the compressor and switching electric circuit.

[Means to solve the problem]

The above object is achieved by flowing hot water into a heat exchanger for hot water heating during dehumidification-based operation and using it as a reheater.

[Effect]

In other words, during dehumidification-based operation, the compressor does not repeatedly start and stop at predetermined intervals, but instead operates almost continuously as in normal cooling, while at the same time supplying hot water to the hot water heating heat exchanger. As a result, the air that has been cooled and dehumidified after passing through the cooling heat exchanger is reheated by the hot water heating heat exchanger, so the temperature of the discharged air from the indoor unit does not feel cold, and the amount of dehumidification is the same as normal cooling. as many as, and compressors.

Deterioration in reliability of switching electrical circuits can also be eliminated. In addition, since the hot water cycle and refrigeration cycle, which are separate cycles, are used simultaneously, the amount of cooling heat or reheating of the air can be easily controlled. Dehumidification-based operation is also easily possible while reducing humidity.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1, 2, 3, and 4.
This will be explained using figures.

Reference numerals 1 and 11 are an indoor unit and an outdoor unit of an air conditioner according to an embodiment of the present invention, 2 is a refrigerant circulation indoor heat exchanger for cooling, 3 is a hot water heating heat exchanger, and 4 is hot water piping. , 5 is a hot water flow rate control valve, 6 is an indoor unit blower, 6-1 is a blower electric motor, 8 is an electrical component for operation control, 9
is a room temperature sensor, 10 is a dew pan, 12 is a refrigerant compressor,
13 is an outdoor heat exchanger for cooling, and 14 is an expansion valve for reducing the pressure of the refrigerant.

15 is a blower of the outdoor unit, and 16 is a heat source device for hot water. In addition, in Fig. 4, 5-1 is the hot water flow control valve 5.
22 is an operation switch, 23 is a room temperature controller, 24 is a fan relay that controls the blower motor 6-1, 25 is a power relay 15-1 is a blower motor for the blower 15, 121 is a compression +@ 12 compression electric motors.

To perform dehumidification-based operation with such a configuration, operate switch 2.
2, the blower electric motor 6-1.15-1 and the compression electric motor 12-1 are energized, and the blower 6.15 and the compressor 12 are operated, forming a well-known refrigerant circulation type refrigeration cycle. At the same time as the refrigerant absorbs heat and evaporates in the heat exchanger 2, the valve driving electric motor 5-1 is energized and hot water flows into the heat exchanger 3 via the hot water flow control valve 5. Indoor air is endothermically cooled and dehumidified by the blower 6 in the heat exchanger 2, then reheated in the heat exchanger 3, and then discharged indoors to perform an operation mainly for dehumidification. In such dehumidification-based operation, the room temperature controller 23
If the difference (A-B) between the set temperature A and the room temperature B sensed by the room temperature sensor 9 is greater than a predetermined value, the valve driving electric motor 5-1
is driven to increase the opening degree of the hot water flow control valve 5 to increase the flow of hot water to the heat exchanger 3, and to increase the amount of air reheating than the amount of cooling heat by the heat exchanger 2. It is possible to gradually raise the room temperature by slightly increasing the temperature of the air discharged into the room. Conversely, if the room temperature rises too much, the set temperature
When the difference (A-B) between the temperature and the room temperature B becomes less than a predetermined value, the valve driving electric motor 415-1 reduces the valve opening degree of the hot water volume control valve 5 to reduce the amount of air reheating. It is also possible to gradually lower the room temperature by slightly lowering the temperature of the air discharged into the room.

Alternatively, in such dehumidification-based operation, the room temperature regulator 23
If the difference (A-B) between the set temperature A and the room temperature B detected by the room temperature sensor 9 is greater than a predetermined value, the compression motor 12-1
The rotational speed of the engine is made low, the amount of refrigerant circulator is made small, the amount of cooling heat of the air by the heat exchanger 2 is made smaller than the amount of reheating by the heat exchanger 3, and the temperature of the air discharged into the room is made a little higher. It is possible to gradually raise the room temperature, or conversely, if the room temperature rises too much, the difference between the set temperature A and room temperature B (A
-B) becomes less than a predetermined value, the compression motor 12-
It is also possible to gradually lower the room temperature by increasing the number of revolutions of the engine 1, increasing the amount of refrigerant circulation, increasing the amount of cooling heat by the heat exchanger 2, and slightly lowering the temperature of the air discharged into the room. With this configuration, the air that has been cooled and dehumidified by the heat exchanger 2 during dehumidification-based operation is reheated by the heat exchanger 3 and discharged into the room, so there is no feeling of cold air and the room is comfortable. The compressor 12 does not repeatedly start and stop at predetermined intervals, but instead operates almost continuously as in normal cooling operation, which has the effect that the amount of cooling and dehumidification of the heat exchanger 2 does not become small. . Furthermore, by controlling the hot water flow rate using the hot water flow rate control valve 5 during dehumidification-based operation, the amount of reheating of the heat exchanger 3 can be easily controlled. It is also possible to control the temperature of the discharged air to be raised or lowered by increasing or decreasing the amount of reheating, which has the effect of allowing dehumidification-based operation while gradually raising or lowering the room temperature. be. In addition, by controlling the rotational speed of the compression motor 12-1 during dehumidification-based operation, the amount of cooling heat of the heat exchanger 2 can be easily controlled. It is also possible to control the temperature of the discharged air to be lowered or raised by increasing or decreasing the cooling heat amount of the device 2, and it is possible to perform dehumidification-based operation while gradually decreasing or increasing the room temperature. effective.

Furthermore, since the compressor 12 is not repeatedly operated and stopped at predetermined intervals, the reliability of the compressor itself and the compression motor 1 are reduced.
This has the effect that the reliability of the switching electric circuit that turns 2-1 ON-OFF is high.

In addition, heat exchangers 2 and 3° compressors 12. The hot water control valve 5, etc. is originally provided for cooling operation and heating operation, and is not specially provided for dehumidification-based operation, but is a special expense to obtain the above-mentioned comfortable dehumidification-based operation. This has the effect of being an unnecessary and economical configuration.

〔Effect of the invention〕

According to the present invention, during dehumidification-based operation, the air that has been cooled and dehumidified by the air-conditioning heat exchanger is reheated by the hot water heating heat exchanger and discharged into the room, resulting in comfortable dehumidification-based operation without the feeling of cold air. It has the great effect of being able to. In addition, since the hot water cycle and refrigeration cycle, which are separate cycles, are used at the same time, it is easy to control the flow rate of hot water to the hot water heating heat exchanger and the amount of refrigerant circulation, and the amount of air reheating or cooling heat can be controlled. Therefore, the temperature of the discharged air can be controlled to be low or high, and the dehumidification-based operation can be performed while gradually increasing or decreasing the room temperature, which is a great effect.

In addition, since the compressor does not repeatedly start and stop at predetermined intervals, the cooling and dehumidifying amount of the cooling heat exchanger does not decrease, and the reliability of the switching electric circuit of the compressor and compression motor is improved. It has the effect of being expensive. Furthermore, since the cooling heat exchanger and compressor originally provided for cooling operation and the heating heat exchanger and hot water control valve originally provided for hot water heating are used for dehumidification-based operation, the above-mentioned comfortable No special equipment is required for dehumidification-based operation, and it is also economically effective. In one embodiment of the present invention, a hot water flow control valve that controls the hot water flow rate by controlling the opening degree of the valve using an electric signal is used as the hot water control valve, but a control valve that simply opens and closes the valve using an electric signal is used. It goes without saying that similar effects can be obtained by controlling the current flow.

In addition, in the example, the hot water entrance control or the amount of refrigerant circulation is controlled using an electric signal corresponding to the difference between the set temperature of the room temperature regulator and the room temperature, but it is also possible to control the comparison value between the set temperature and the room temperature other than the difference. The same effect can be obtained even if the control is performed using the electrical signal.

[Brief explanation of the drawing]

FIG. 1 is a cycle configuration diagram of an embodiment of the present invention, FIG.
FIG. 3 is a front view and a side view of an indoor unit according to an embodiment of the present invention. FIG. 4 is an electrical circuit diagram for operation control according to an embodiment of the present invention. ■... Indoor unit, 2... Indoor heat exchanger for cooling, 3... Heat exchanger for hot water heating.

Claims (1)

[Claims] 1. In an air conditioner consisting of a refrigerant circulation heat exchanger for cooling, a heat exchanger for hot water heating, a hot water control valve, a refrigerant compressor, a blower, and electrical components, cooling passes through the heat exchanger for cooling. An air conditioner characterized by passing dehumidified air through a heat exchanger for hot water heating to reheat it.