JP2001280668A - Method for controlling air-conditioning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for controlling air-conditioning by which the temperature of reheated dry air blown out of an indoor heat exchanger is raised by reducing the heat exchange by means of an outdoor heat exchanger during the reheating and drying operation of the outdoor heat exchanger. SOLUTION: In this method, the temperature of the reheated dry air is raised by increasing the quantity of a refrigerant sent to the indoor heat exchanger 20 by minimizing the heat exchange by means of the outdoor heat exchanger 14 at the time of cooling an inverter device 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning control method, and more particularly to a method of cooling an air conditioner, reducing the heat exchange of an outdoor heat exchanger, and reducing the heat exchange of an outdoor heat exchanger. The present invention relates to an air conditioning control method for increasing the temperature of dry air blown into a room.

[0002]

2. Description of the Related Art Generally, in order to perform a cooling operation of an air conditioner 10, a compressor 12 is variably driven by an inverter device 11 as shown in FIG. This compressed refrigerant is sent to the outdoor heat exchanger 14 via the four-way valve 13 and condenses it.

The condensed refrigerant is sent via an electronic expansion valve 15 and a drier 16 to an indoor heat exchanger 20 comprising a first indoor heat exchanger 17, a bleed port valve 18 and a second indoor heat exchanger 19. This is evaporated and cooled.

[0004] The evaporative refrigerant is returned to the compressor 11 via the four-way valve 13, compressed again, and repeatedly sent to the outdoor heat exchanger 14 and the like to perform a refrigeration cycle operation.

[0005] An outdoor fan 21 is provided near the outdoor heat exchanger 14 of the air conditioner 10 and the inverter device 11, and is connected to the inverter device 11 via the outdoor heat exchanger 14.
It is designed to cool down.

An indoor fan 22 is provided near the indoor heat exchanger 20 to exchange heat between air and the indoor heat exchanger 21 to blow cool air into the room.

In order to perform the reheat dry operation of the air conditioner 10, the electronic expansion valve 15 and the bleed port valve 18 are operated by a microcomputer (not shown), and the electronic expansion valve 1 is operated.
The actuator 5 (not shown) is opened, and the actuator of the preped port valve 18 is throttled.

By this operation, the refrigerant compressed by the compressor 12 is supplied to the four-way valve 13, the outdoor heat exchanger 14, and the expansion valve 1.
5. It is sent to the first indoor heat exchanger 17 via the dryer 16 and heats it. Also, the second indoor heat exchanger 1
The refrigerant throttled by the pleed port valve 19 is sent to 9 to cool it.

The reheat dry operation for removing moisture in the air is performed by the heated first indoor heat exchanger 17 and the cooled second indoor heat exchanger 19. This reheat dry operation is designed to reduce the heat exchange of the outdoor heat exchanger in order to keep the temperature of the air blown into the room at an appropriate temperature.

The heat exchange of the outdoor heat exchanger is reduced by operating the outdoor fan at a low speed. However, the outdoor fan simultaneously reduces the rotation speed of the outdoor fan excessively for cooling the inverter device. Can not do.

[0011] Therefore, there is a problem that heat exchange in the outdoor heat exchanger is increased and a sufficient amount of heat radiation from the indoor heat exchanger cannot be secured.

Therefore, the present invention minimizes the heat exchange of the outdoor heat exchanger and raises the temperature blown out from the indoor heat exchanger to a high temperature even when the inverter is cooled by the outdoor fan when the air conditioner is reheat-dried. It is an object of the present invention to provide an air-conditioning control method that performs the above-described steps.

[0013]

According to the present invention, there is provided a refrigeration cycle and an inverter device including a compressor, an outdoor heat exchanger, an indoor heat exchanger, a bypass valve, a bleed port valve and the like, an outdoor fan, an indoor fan, and the like. In the reheat dry operation of an air conditioner equipped with electric components, when cooling the inverter device, minimize the heat exchange in the outdoor heat exchanger, increase the amount of refrigerant sent to the indoor heat exchanger, and increase the temperature of the reheat dry air. Is raised.

According to a second aspect of the present invention, the compressed refrigerant flows into the outdoor heat exchanger and the bypass valve in parallel, and the inverter device and the outdoor heat exchanger are cooled by controlling the outdoor fan to stop and sent to the indoor heat exchanger. The amount of the refrigerant is increased to increase the temperature of the reheated dry air.

Further, according to the third aspect of the present invention, when the refrigerant stagnates in the outdoor heat exchanger, the bypass valve is closed, the condensed refrigerant flows in the outdoor heat exchanger, the stagnation refrigerant is suppressed, and the reheat dry operation is stably operated. It is something to do.

Further, in the inventions according to claims 4 and 5, the compressor or the indoor fan is controlled to be stopped or rotated at a low speed when the inverter device is being cooled to reduce the power consumption of the air conditioner.

Further, the invention according to claim 6 is a compressor,
In the reheating dry operation of an air conditioner equipped with an electric device such as an outdoor heat exchanger, an indoor heat exchanger, a bypass valve, a bleed port valve, and a refrigeration cycle and an inverter device, an outdoor fan and an indoor fan, the inverter device is used. And the outdoor heat exchanger is separated and cooled to minimize the heat exchange of the outdoor heat exchanger, increase the amount of refrigerant sent to the indoor heat exchanger, and raise the temperature of the reheat dry air.

The invention according to claim 7 is a compressor,
In the reheating and dry operation of an air conditioner equipped with an electric component such as an outdoor heat exchanger, an indoor heat exchanger, a bypass valve, a bleed port valve and the like, an inverter device, an outdoor fan, an indoor fan, etc. The refrigerant flowing through the exchanger is short-circuited by a valve, the amount of refrigerant sent to the indoor heat exchanger is increased, and the temperature of the reheat dry air is increased.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the air-conditioning control method according to the present invention will be described below with reference to FIGS.

The air conditioning control method of the air conditioner 30 applied to the present invention is basically the same as the air conditioning control method of the conventional air conditioner 10, so that the air conditioner 30 of the present invention is different from the conventional air conditioner. The same parts as in FIG.

The air conditioner 30 applied to the present invention is provided with a bypass circuit 32 having a bypass valve 31 between the compressor 12, the expansion valve 15 and the dryer 16 as shown in FIG.

When the air conditioner 30 is operated for reheating and dry operation, the electronic expansion valve 15, the bleed port valve 18 and the bypass valve 31 are operated by the microcomputer.
The actuator (not shown) of the electronic expansion valve 15 is opened, and the valve body (not shown) of the bypass valve 31 is opened as shown in FIG.

By this operation, the refrigerant compressed by the compressor 12 is sent to the indoor heat exchanger 20 via the bypass circuit 32 and, to a small extent, the indoor heat exchange is performed via the outdoor heat exchanger 14, the electronic expansion valve 15, and the dryer 16. Vessel 20
To run concurrently.

At this time, if the inverter device 11 is not at a high temperature, the operation of the outdoor fan 22 is stopped. When the temperature of the inverter device 11 is about 80 ° C. or the operation time of the inverter device 11 detected in advance, for example, when the time t1 has elapsed, the operation of the outdoor fan 21 is operated at about 700 rpm, and the outdoor heat exchanger 14 exchanges heat with the refrigerant. At the same time, the inverter device 11 is cooled.

In this manner, a large amount of the refrigerant compressed by the compressor 12 is sent to the indoor heat exchanger 20, and the heating of the indoor heat exchanger 20, that is, the first indoor heat exchanger 17 is increased, and the second indoor heat exchanger 17 is heated. The temperature of the air cooled by the exchanger 19 can be increased, and the temperature of the reheated dry air blown into the room can be increased.

At this time, since the outdoor heat exchanger 14 is connected in parallel with the bypass circuit 32, the amount of refrigerant in the outdoor heat exchanger 14 decreases, and the high-temperature refrigerant sent to the indoor heat exchanger 20 even when the outdoor fan 21 is operating. The amount can be increased.

Further, since the inverter device 11 is cooled by the outdoor fan 21 while monitoring its temperature, the semiconductor device used for the inverter device 11 can be protected from an excessively high temperature.

Further, when the inverter device 11 is cooled by the outdoor fan 21, the refrigerant stagnates in the outdoor heat exchanger 14,
That is, a liquid reservoir is generated. To prevent this stagnation, as shown in FIG. 2, the outdoor fan 21 is operated for about 3 minutes, the bypass valve 31 is closed for about 1 minute (t2 to t3), the compressed refrigerant is sent to the outdoor heat exchanger 14, and the refrigerant stagnation is eliminated. Can be done.

By such control, the flow of the refrigerant flowing in the bypass circuit 32 and the outdoor heat exchanger 14 together can be stabilized.

Although the compressor 12 is in a normal operation state, the power consumption of the air conditioner 30 is reduced by stopping the operation of the compressor 12 or rotating it at a low speed as shown in FIG. May be suppressed.

Similarly, the compressor 12 is in the normal operation state, but the power consumption of the air conditioner 30 can be suppressed by stopping or rotating the indoor fan 22 at a low speed while the outdoor fan 21 of the inverter device 11 is cooling. .

Further, in these controls, as shown in FIG. 3, the operation time (t22) of the outdoor fan 21 and the opening time (t22) of the bypass valve 31 are slightly advanced (t11) so that each operation can be relaxed. Is also good.

Next, a second embodiment of the air conditioning control method of the present invention will be described with reference to FIG.

FIG. 4 is basically similar to FIG. 1 except that the outdoor heat exchanger 14 is provided with an outdoor fan 21 to cool only the outdoor heat exchanger 14.

The inverter device 11 for variably driving the compressor 12 is provided with an inverter fan 41 or another cooler to cool only the inverter device 11.

As described above, the cooling of the outdoor heat exchanger 14 and the cooling of the inverter device 11 can be mechanically separated from each other, the heat exchange of the outdoor heat exchanger 14 is reduced, and the indoor heat exchanger 2 is cooled.
0, in particular, the amount of reheat of the first indoor heat exchanger 17 can be increased.

Next, a third embodiment of the air conditioning control method according to the present invention will be described with reference to FIG.

FIG. 5 is basically the same as FIG. 1 except that the four-way valve 31 is provided with a second four-way valve 51 to connect the outdoor heat exchanger 14 and the indoor heat exchanger 20 and The heat exchanger 14 is short-circuited.

In order to cool the air conditioner 50, the compressed refrigerant of the compressor 12 is supplied to the four-way valve 13, the second four-way valve 51, the outdoor heat exchanger 14, the second four-way valve 51, and the electronic expansion valve 15. , Dryer 16, first outdoor heat exchanger 1
7, Preed port valve 18, second indoor heat exchanger 19,
A refrigeration cycle for returning to the compressor 12 via the four-way valve 13 is configured, the outdoor heat exchanger 14 condenses the refrigerant, and the first indoor heat exchanger 17 and the second indoor heat exchanger 20 evaporate and cool the refrigerant. It has become.

At this time, the outdoor fan 21 is rotated at a low speed or stopped. By this refrigeration operation, the outdoor heat exchanger 1
4. Dry the inside of 4.

After the above operation, the second four-way valve 51 is inverted to short-circuit the outdoor heat exchanger 14 as shown in FIG. 5, and the refrigerant compressed by the compressor 12 is passed through the second four-way valve 51. Electronic expansion valve 15, dryer 16,
The first indoor heat exchanger 17, the preed port valve 18, the second
To the indoor heat exchanger 19 and the like.

The inversion of the second four-way valve 51 adjusts the actuator of the pleed port valve 18, heats the first indoor heat exchanger 17, cools the second indoor heat exchanger 19, and cools the air conditioner 50. Reheat dry operation.

When the air conditioner 50 is reheated and dried in this manner, the refrigerant does not flow through the outdoor heat exchanger 14, so that the heat exchange is minimized, the reheat amount of the indoor heat exchanger 20 is increased, and the blowout temperature is increased. Can be.

[0044]

The invention of each claim includes a refrigeration cycle and an inverter device including a compressor, an outdoor heat exchanger, an indoor heat exchanger, a bypass valve, a bleed port valve and the like, and electric components such as an outdoor fan and an indoor fan. In the reheat dry operation of the air conditioner, when cooling the inverter unit, minimize the heat exchange in the outdoor heat exchanger, increase the amount of refrigerant sent to the indoor heat exchanger, and raise the temperature of the reheat dry air. It was done.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an outline of an air conditioner applied to an air conditioning control method of the present invention.

FIG. 2 is an explanatory diagram showing an operation example of an outdoor fan, a bypass valve, and the like in FIG. 1;

FIG. 3 is an explanatory view showing another operation example of the outdoor fan, the bypass valve, and the like in FIG. 1;

FIG. 4 is an explanatory diagram showing an outline of another air conditioner applied to the air conditioning control method of the present invention.

FIG. 5 is an explanatory diagram showing an outline of still another air conditioner applied to the air conditioning control method of the present invention.

FIG. 6 is an explanatory diagram showing an outline of a conventional air conditioning control method for an air conditioner.

[Explanation of symbols]

 10, 30, 40, 50 Air conditioner 11 Inverter device 12 Compressor 13 Four-way valve 14 Outdoor heat exchanger 17 First indoor heat exchanger 18 Preed port valve 19 Second indoor heat exchanger 20 Indoor heat exchanger 21 Indoor Fan 22 Indoor fan 31 Bypass valve 41 Inverter fan 51 Second four-way valve

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[Procedure amendment]

[Submission date] April 11, 2000 (2004.1.
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004] The evaporative refrigerant is returned to the compressor 12 via the four-way valve 13, compressed again, and repeatedly sent to the indoor heat exchanger 14 and the like to perform a refrigeration cycle operation.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction contents]

Since the basic configuration of the air conditioning control method for the air conditioner 30 of the present invention is the same as the basic configuration of the air conditioning control method for the conventional air conditioner 10, the conventional air conditioner 10 in the air conditioner 30 of the present invention is used. The same parts as those described above are denoted by the same reference numerals and described.

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 5

FIG. 6

Claims (7)

[Claims] 1. A refrigerating cycle comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, a bypass valve, a bleed port valve and the like, and an air conditioner equipped with electric components such as an outdoor fan and an indoor fan. An air conditioning control method characterized in that when cooling an inverter device in heat dry operation, heat exchange in an outdoor heat exchanger is minimized and the amount of refrigerant sent to the indoor heat exchanger is increased. 2. The method according to claim 1, wherein the compressed refrigerant flows into the outdoor heat exchanger and the bypass valve in parallel, and the inverter device and the outdoor heat exchanger are cooled by operation control of the outdoor fan to increase the amount of refrigerant sent to the indoor heat exchanger. 2. The air conditioning control method according to claim 1, wherein: 3. The refrigerant according to claim 1, wherein when the refrigerant stagnates in the outdoor heat exchanger, the bypass valve is closed and the compressed refrigerant flows through the outdoor heat exchanger to suppress the stagnation refrigerant. Air conditioning control method. 4. The air conditioning control method according to claim 1, wherein the compressor is stopped or rotated at a low speed when the inverter device is being cooled. 5. The air conditioning control method according to claim 1, wherein the indoor fan is stopped or rotated at a low speed when the inverter device is being cooled. 6. A refrigerating cycle comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, a bypass valve, a bleed port valve and the like, and an air conditioner equipped with an electric device such as an inverter device, an outdoor fan and an indoor fan. In the heat dry operation, the inverter device and the outdoor heat exchanger are separated and cooled, the heat exchange of the outdoor heat exchanger is minimized, and the amount of refrigerant sent to the indoor heat exchanger is increased. Air conditioning control method. 7. A refrigerating cycle comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, a bypass valve, a bleed port valve and the like, and an air conditioner equipped with electric parts such as an outdoor fan and an indoor fan. An air-conditioning control method characterized in that in the thermal dry operation, the outdoor heat exchanger is short-circuit-controlled to increase the amount of refrigerant sent to the indoor heat exchanger.