JPS596349Y2 - air conditioner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air conditioner capable of dehumidifying operation in addition to cooling, and in particular provides an air conditioner that can control room temperature even during dehumidifying operation.

Conventionally, air conditioners capable of dehumidifying operation cannot control the temperature of the indoor air blown out during dehumidification operation, and in particular, the blown air temperature also changes depending on the outside air temperature, so the room temperature may drop or become warm. It was difficult to maintain the required temperature.

The present invention is intended to improve this, and to explain the present invention with reference to an embodiment shown in the figure below, a parallel circuit of a first capillary 3 and a first solenoid valve 4 is connected from a compressor 1 through an outdoor heat exchanger 2. A parallel circuit of a second capillary 6 and a second solenoid valve 7 is provided from the same circuit through a reheat/cooler 5 on the indoor side, and from the same circuit through another cooler 8 on the indoor side to the compressor 1. Shape the refrigerant flow path.

On the other hand, a changeover switch 12 for the indoor fan motor 11 is provided on one of the connection lines connected to the power supply connection terminal.
The common terminal of the room temperature controller 31 is connected to one side of 2, and the first cooling side contact D of the cooling/dehumidifying switch 32 is connected in parallel to the contact A that closes below the set temperature of the room temperature controller 31. In addition, the first dehumidifying side contact C of the changeover switch 32 is connected in parallel to the contact B which closes when the temperature is higher than the set temperature.

Also, the second dehumidifying side contact E of the cooling/dehumidifying switch 32 connected to the other connection line of the power supply and the first dehumidifying side contact C
The coil 41 of the first solenoid valve 4 is connected between them, and the coil 71 of the second solenoid valve 7 is similarly connected between the second cooling side contact F and the first cooling side contact D.

In addition, a relay 9 is provided that connects the outdoor fan motor 21 connected to the contact B of the room temperature controller 31 and the contact A side, and connects the terminal on the strong wind operation side of the outdoor fan motor 21 to the contact F side of the cooling dehumidification switch 32. Similarly, the terminal on the breeze operation side is connected to the contact E side of the switch 32 via the normally closed contact G of the relay 9.

The operation of the above structure will be explained next. First, in the case of cooling operation, when the cooling/dehumidifying switch 32 is switched to the cooling side, the second solenoid valve 7 is energized through the contacts D and F. Ru.

Therefore, when the temperature is higher than the set temperature of the room temperature controller 31,
The compressor 1 is operated through the contact B, and the outdoor fan motor 21 is operated with strong wind through the contact F.

From this compressor 1 to the outdoor heat exchanger 2 and the first capillary 3
, the cooling operation is performed through the refrigerant flow path that passes through the reheat/cooler 5, the second solenoid valve 7, and the cooler 8 and reaches the compressor 1. As a result, the room temperature decreases, and when the room temperature falls below the set temperature, the room temperature controller 3
1 switches to contact A side, compressor 1 and outdoor fan motor 2
1 stops.

Next, in the case of dehumidifying operation, when the cooling/dehumidifying switch 32 is switched to the dehumidifying side, the first electromagnetic valve 4 is energized through the contacts C and E.

Thus, the contact B side of the room temperature regulator 31 is short-circuited through the contact C, and the compressor 1 is operated regardless of the room temperature.

Further, when the temperature is higher than the set temperature of the room temperature controller 31, the contact B side is closed, so the relay 9 is deenergized, and the outdoor fan motor 21 is operated on the breeze side through the normally closed contact G.

As a result, when the room temperature falls below the set temperature, the room temperature regulator 31 switches to the contact A side, and the relay 9 is energized.
The contact G is opened, the outdoor fan 21 is stopped, and the indoor air blowing temperature becomes high and is controlled to the required indoor temperature.

Furthermore, when the room temperature becomes higher than the set temperature again during this dehumidification operation, the room temperature controller 31 switches to the contact B side, the relay 9 is deenergized, and the outdoor fan motor 21 is switched to the breeze side again through the contact G of the relay. The dehumidifying operation is performed at the required indoor air outlet temperature.

As explained above, during dehumidification operation, the outdoor fan motor 2
1 can be controlled via the relay 9 controlled by the room temperature controller 31 to adjust the blowing temperature. Therefore, the required room temperature can be adjusted based on the settings of the room temperature controller 31. It is possible to eliminate the disadvantages of being too cold or too hot during dehumidification operation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a wiring diagram of a control circuit of an air conditioner, and Fig. 2 is a piping diagram of the main parts of a refrigerant flow path. In the figure, 1 is a compressor, 2 is an outdoor heat exchanger, 3 is a first capillary, 4 is a first solenoid valve, 5 is a reheat/cooler, 6 is a second capillary, and 7 is a second solenoid valve. , 8 is a cooler, 31 is a room temperature controller, 32 is a cooling/dehumidifying switch, 9 is a relay,
21 is the outdoor fan mode.

Claims (1)

[Scope of utility model registration request] Parallel circuits with capillaries and solenoid valves are installed between the outdoor heat exchanger connected to the compressor and the plurality of indoor heat exchangers, respectively, and cooling operation and dehumidification operation can be performed by selectively switching the solenoid valves. In an air conditioner that performs
The first cooling side contact D of the dehumidification changeover switch is connected to the contact B which also closes at a temperature higher than the set temperature, and the first dehumidification side contact C of the changeover switch is connected to the cooling side connected to the other connection line of the power supply. A dehumidification solenoid valve is connected between the second dehumidification side contact E and the first dehumidification side contact C of the dehumidification changeover switch.
Cooling solenoid valves are connected between the cooling side contact F and the first cooling side contact D, respectively, while the temperature controller contact B
Connect the outdoor fan motor to contact A, connect the relay to contact A, connect the strong wind side terminal of the outdoor fan motor to contact F of the cooling/dehumidification switch, and connect the breeze side terminal to contact G of the relay. and a contact point E of the changeover switch, respectively.