JP3062038B2 - Converter for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner using a refrigeration cycle, which is capable of preventing a decrease in cooling capacity which occurs when a refrigerant used is changed from a single refrigerant to a non-azeotropic mixed refrigerant. The present invention relates to a mechanical converter.

[0002]

2. Description of the Related Art In recent years, air conditioners have been required to use a refrigerant that does not destroy the ozone layer. Therefore, it is necessary to use a non-azeotropic mixed refrigerant as one of the refrigerants.

Conventionally, an air conditioner using a non-azeotropic refrigerant of this type, as shown in FIG. 8, the outdoor unit 101
Inside, a compressor 102, an outdoor heat exchanger 103, a blower 104 for outdoor heat exchange of the outdoor heat exchanger 103, and a four-way valve 105 are provided. Inside the indoor unit 106, an expansion valve 107, The indoor heat exchanger 108 and the indoor heat exchanger 10
8 is provided with the indoor heat exchange blower 109, and the outdoor unit 101 and the indoor unit 106
10 and a gas pipe 111.

In the above configuration, during the cooling operation, the four-way valve 105 in the outdoor unit 101 is switched to a circuit shown by a solid line, so that the refrigerant discharged from the compressor 102 passes through the four-way valve 105 and passes through the outdoor heat exchanger 103. to go into. The refrigerant that has entered the outdoor heat exchanger 103 is a blower 1 for outdoor heat exchange.
It is condensed and liquefied by the action of 04. The condensed refrigerant passes through the liquid pipe 110, and the expansion valve 107 in the indoor unit 106
Is depressurized. The depressurized refrigerant is sent to the indoor heat exchanger 108, evaporates by the function of the indoor heat exchange blower 109, passes through the gas pipe 111, and returns to the outdoor unit 101. This work will be described with reference to FIG. FIG. 9 is a Ph diagram showing the state value of the refrigerant with the pressure on the vertical axis and the enthalpy on the horizontal axis. The compressor 102 sucks the refrigerant in the state at the point 112 and compresses the refrigerant into the state at the point 113. The compressed refrigerant gas enters the outdoor heat exchanger 103 and is condensed and liquefied at a constant pressure to a state at a point 114. The liquefied refrigerant is decompressed in the expansion valve 107 to be in a state at a point 115. The depressurized refrigerant is sent to the indoor heat exchanger 108 and evaporates at a constant pressure. At this time, the temperature of the refrigerant increases as the refrigerant absorbs heat in the indoor heat exchanger 108, and the refrigerant enters the state at the point 112. At this time, the air blown from the indoor heat exchange blower 109 is cooled by the indoor heat exchanger 108, so that the cooling operation can be performed.

During the heating operation, the outdoor unit 10
1 is switched to the circuit shown by the dotted line, so that the refrigerant discharged from the compressor 102 is supplied to the four-way valve 10.
5. The gas is sent to the indoor heat exchanger 108 through the gas pipe 111, and is condensed by the function of the indoor heat exchange blower 109. The condensed refrigerant is supplied to the expansion valve 10 in the outdoor unit 101.
7, and is passed through the liquid pipe 110 so that the outdoor heat exchanger 1
03 is sent. The refrigerant that has entered the outdoor heat exchanger 103 evaporates due to the action of the outdoor heat exchange blower 104, and the four-way valve 1
Return to the compressor through 05. At this time, the air blown from the indoor heat exchange blower 109 is heated by the indoor heat exchanger 108, so that a heating operation is performed.

[0006]

In the above prior art,
When performing a cooling operation of an air conditioner using a non-azeotropic mixed refrigerant,
In the indoor heat exchanger, the temperature of the refrigerant rises as the heat exchange progresses, so the temperature difference with the air becomes smaller and the heat exchange becomes difficult to perform. There was a problem of lowering.

A first object of the present invention is to improve the heat exchange capacity of an indoor heat exchanger by mounting a simple device between an indoor unit and an outdoor unit, and not to operate the heat exchanger when unnecessary. It was done.

A second object of the present invention is to improve the heat exchange capacity of the indoor heat exchanger by mounting a simple device between the indoor unit and the outdoor unit, and to prevent the automatic operation during the heating operation. It was done.

[0009] A third object of the present invention is to provide a structure in which the heat exchange capacity of the indoor heat exchanger is variably improved by mounting a simple device between the indoor unit and the outdoor unit.

A fourth object of the present invention is to improve the heat exchange capacity of the indoor heat exchanger by installing a simple device between the indoor unit and the outdoor unit, and to collect the liquid refrigerant when the circuit is unnecessary. It is configured not to be inserted.

A fifth object of the present invention is to improve the heat exchange capacity of the indoor heat exchanger by installing a simple device between the indoor unit and the outdoor unit, and to collect the liquid refrigerant when the circuit is unnecessary. In this case, when the pressure of the enclosed refrigerant becomes high and it is dangerous, the refrigerant is opened.

[0012]

The first means for achieving the first object of the present invention comprises two passages through which a refrigerant passes, means for exchanging heat between the two passages, A connection port is provided at both ends of each of the two passages, a bypass passage is provided in one of the passages, and a valve is provided in the bypass passage.

Further, a second means for achieving the second object is obtained by the structure according to claim 1 wherein comprising providing a check valve in the bypass passage.

Further, a third means for achieving the third object, claims the bypass passage formed by providing a flow control valve
1 is described.

The fourth means for attaining the fourth object has a structure according to claim 1, 2 or 3 , wherein valves are provided at both ends of a passage which can be bypassed by a bypass passage. It is.

Further, a fifth means for achieving the fifth object of the claims 1, 2, 3 also a passage which can be bypassed by a bypass passage formed by providing a pressure operation valve
Is a configuration described in 4 .

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a refrigerant flowing in an indoor heat exchanger is exchanged with a refrigerant having completed heat exchange from an indoor heat exchanger during cooling to flow in a room. Allows to lower the temperature of the heat exchange
Exchange capacity can be improved , and during heating operation
By opening the valve and opening the bypass passage, the indoor heat exchanger
The flowing hot gas refrigerant flows from the indoor heat exchanger
It can prevent the temperature from being lowered by the refrigerant.
You.

[0018] Also, the configuration of the second means, that at the time of cooling lower the temperature of the refrigerant flowing through the finished refrigerant heat exchanger flowing from the refrigerant and the indoor heat exchanger flows into the indoor heat exchanger into the room to heat exchange In the heating operation, the check valve operates to automatically open the bypass passage and lower the temperature of the high-temperature gas refrigerant flowing through the indoor heat exchanger by the low-temperature refrigerant flowing from the indoor heat exchanger. Can be prevented.

Further, according to the configuration of the third means, the amount of heat exchange between the refrigerant flowing through the indoor heat exchanger and the refrigerant having finished heat exchange flowing from the indoor heat exchanger during cooling can be adjusted. This makes it possible to adjust the temperature of the refrigerant flowing through the heat exchanger, and to prevent the temperature of the refrigerant from being lowered by the low-temperature refrigerant flowing from the indoor heat exchanger.

Further, by the configuration of the fourth means, it is possible to lower the temperature of the refrigerant flowing into the room by performing heat exchange between the refrigerant flowing through the indoor heat exchanger and the refrigerant having completed the heat exchange flowing from the indoor heat exchanger during cooling. During the heating operation, the valve can be opened and the bypass gas can be passed through the indoor heat exchanger to prevent the high-temperature gas refrigerant flowing through the indoor heat exchanger from lowering due to the low-temperature refrigerant flowing from the indoor heat exchanger. When the circuit is unnecessary, the liquid refrigerant does not accumulate.

Further, by the configuration of the fifth means, it is possible to lower the temperature of the refrigerant flowing in the room by performing heat exchange between the refrigerant flowing in the indoor heat exchanger and the refrigerant having finished heat exchange flowing from the indoor heat exchanger during cooling. During the heating operation, the valve can be opened and the bypass gas can be passed through the indoor heat exchanger to prevent the high-temperature gas refrigerant flowing through the indoor heat exchanger from lowering due to the low-temperature refrigerant flowing from the indoor heat exchanger. When the circuit is unnecessary, the liquid refrigerant does not accumulate, and can be opened when the pressure of the enclosed refrigerant becomes high and it is dangerous.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS .
2. Description will be given with reference to FIG . The same components as those in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.
FIG. 3 shows the refrigeration cycle. In FIG. 1 , adapter 1
There are a liquid pipe 2 and a gas pipe 3 inside the
There is a bypass pipe 4 that bypasses the pipe 3,
The liquid pipe 2 has connection ports 2a and 2b for flare connection, and the gas pipe 3 has connection ports 3a and 3b for flare connection at both ends. As shown in FIG. 2, the side surfaces of the liquid pipe 2 and the gas pipe 3 are joined to each other, and the connection ports 2b and 3b of the adapter 1 and the indoor unit 10 are connected.
6 is connected, and the liquid pipe 110 and the gas pipe 111 are connected to the connection ports 2 a and 3 a of the adapter 1. The indoor unit 106, the liquid pipe 110, and the gas pipe 111
The connection with the wire may be made by any method as long as there is no leakage such as brazing.

In the above configuration, during the cooling operation, the four-way valve 105 in the outdoor unit 101 is switched to the circuit shown by the solid line, so that the refrigerant discharged from the compressor 102 passes through the four-way valve 105 and passes through the outdoor heat exchanger 103. to go into. The refrigerant that has entered the outdoor heat exchanger 103 is a blower 1 for outdoor heat exchange.
It is condensed and liquefied by the action of 04. The condensed refrigerant passes through the liquid pipe 2, passes through the liquid pipe 2 in the adapter 1, and is cooled by the refrigerant passing through the gas pipe 3. The cooled liquid refrigerant is decompressed by an expansion valve 107 in the indoor unit 106. The depressurized refrigerant is sent to the indoor heat exchanger 108 and evaporated by the function of the indoor heat exchange blower 109. By closing the stop valve 7, the evaporated refrigerant is heated by the refrigerant passing through the gas pipe 3 in the adapter 1 and passing through the liquid pipe 2. The heated refrigerant returns to the outdoor unit 101 via the gas pipe 111. As described above, when the refrigerant passes through the adapter, heat is transferred from the liquid pipe 2 to the gas pipe 3. During heating
By opening the stop valve 7, the high-temperature gas refrigerant is
Through the gas pipe 3 so as not to pass through the gas pipe 3.
Therefore, there is no heat loss when the gas refrigerant passes through the adapter 1.
No.

This operation will be described with reference to FIG. 3 for a cooling operation cycle. The refrigerant in the state of the point 112 is
Are inhaled and compressed to the state of point 113. The compressed refrigerant gas enters the outdoor heat exchanger 103 and condenses at a constant pressure.
It is liquefied to the state at point 114. When the liquefied refrigerant further passes through the liquid pipe 2 in the adapter 1, heat moves to the gas pipe 3, so that the refrigerant is in a state of a point 5 a. Next, the refrigerant is supplied to the expansion valve 10.
At 7 the pressure is reduced to point 5b . The depressurized refrigerant is sent to the indoor heat exchanger 108 and exchanges heat to be in a state at a point 6. Further, the refrigerant absorbs heat when passing through the inside of the adapter 1 and is in a state at a point 112. Heat exchange between air and refrigerant in the indoor heat exchanger 108, although when there is no adapter 1 is the state of point 115, the refrigerant of point 5 b in the state of lower temperature when the adapter 1 is mounted an indoor After entering the exchanger 108, the temperature difference between the air and the refrigerant increases, and heat exchange becomes easier, so that the heat exchange capacity of the indoor heat exchanger 108 improves.

As described above, according to the air conditioner of the first embodiment of the present invention, the temperature of the refrigerant flowing to the indoor heat exchanger can be reduced by the refrigerant having completed the heat exchange flowing from the indoor heat exchanger. The heat exchange capacity of the heat exchanger can be improved , and heat loss during heating can be prevented .

[0026] One second embodiment of the technique of the present invention, FIG. 4
This will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 4 shows the refrigeration cycle. In the figure, a check valve 8 is provided in the middle of the bypass pipe 4 in the adapter 1.

In the above configuration, during the cooling operation, the condensed refrigerant cannot pass through the check valve 8 in the adapter 1, so that the refrigerant passing through the gas pipe 3 and passing through the liquid pipe 2 is cooled. At the time of heating, since the refrigerant can pass through the check valve 8, the high-temperature gas refrigerant does not pass through the gas pipe 3 by passing through the bypass pipe 4. Has no heat loss.

As described above, according to the air conditioner of the second embodiment of the present invention, the heat exchange capacity of the indoor heat exchanger can be improved, and heat loss during heating can be automatically prevented. be able to.

[0029] Next, a third embodiment of the present invention, FIG. 5
This will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The refrigeration cycle shown in Figure 5. In the figure, a flow control valve 9 is provided in the middle of the bypass pipe 4 in the adapter 1.

In the above configuration, during the cooling operation, the amount of the refrigerant passing through the gas pipe 3 can be adjusted by the flow control valve 9 so that the amount of the refrigerant passing through the gas pipe 3 in the adapter 1 is adjusted. Since the amount of heat exchange with the heat exchanger can be adjusted, the improvement of the heat exchanger capacity can be adjusted, so that the improvement of the heat exchanger capacity can be adjusted. At the time of heating, since the refrigerant can pass by fully opening the flow control valve 9, the high-temperature gas refrigerant does not pass through the gas pipe 3 by passing through the bypass pipe 4. No heat loss when passing through 1.

As described above, according to the air conditioner of the third embodiment of the present invention, the heat exchange capacity of the indoor heat exchanger can be variably improved, and heat loss during heating can be prevented. be able to.

[0032] Next, a fourth embodiment of the present invention, FIG. 6
This will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 7 shows the refrigeration cycle. In the figure, valves 10a and 10b are provided at both ends of a gas pipe 3 in an adapter 1.

In the above configuration, during cooling operation, the condensed refrigerant passes through the liquid pipe 2 in the adapter 1 by closing the stop valve 7 and opening the valves 10a and 10b. At that time, it is cooled by the evaporated refrigerant passing through the gas pipe 3. At the time of heating, by opening the stop valve 7 and closing the valves 10a to 10b ,
Since the high-temperature gas refrigerant passes through the bypass pipe 4, the gas pipe 3
Never pass through. Therefore, there is no heat loss when the gas refrigerant passes through the adapter 1, and a closed circuit is formed between the valves 10a and 10b of the gas pipe 3, so that the refrigerant does not accumulate.

As described above, according to the air conditioner of the fourth embodiment of the present invention, the heat exchange capacity of the indoor heat exchanger can be improved, and heat loss during heating can be prevented. Thus, accumulation of the refrigerant in the adapter 1 can be prevented.

[0035] Next, a fifth embodiment of the present invention, FIG. 7
This will be described with reference to FIG. The same components as those in the fourth embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 6 shows the refrigeration cycle. In the figure, a pressure regulating valve 11 is provided in parallel with a valve 10a in an adapter 1.

In the above configuration, during heating, the valves 10a to 10a
When the pressure in the closed circuit between the valve 10a and the valve 10b of the gas pipe 3 becomes dangerously high due to the closing of the pressure control valve 11b, the pressure regulating valve 11
Opens to reduce the pressure of the gas pipe 3 between the valve 10a and the valve 10b.

As described above, according to the air conditioner of the fifth embodiment of the present invention, the heat exchange capacity of the indoor heat exchanger can be improved, and heat loss during heating can be prevented. In addition, accumulation of the refrigerant in the adapter 1 can be prevented, and furthermore, when the inside of the closed circuit becomes dangerously high, the pressure can be automatically reduced.

[0038]

As is apparent from the above embodiments, according to the present invention, since the temperature of the refrigerant flowing through the heat exchanger can be reduced by using the air conditioner using a non-azeotropic mixed refrigerant, Ability can be improved. Also,
When it is not necessary or during the heating operation, it can not be automatically activated, and the capacity can be variably improved. In addition, it is possible to provide an air conditioner converter in which liquid refrigerant does not accumulate when the circuit is unnecessary, and can be opened when the pressure of the enclosed refrigerant becomes high and dangerous.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an air conditioner converter according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a joining part of a liquid pipe and a gas pipe of the air conditioner converter.

FIG. 3 is a state diagram of a refrigeration cycle of the air conditioner converter.

FIG. 4 is a configuration diagram of an air conditioner converter according to the second embodiment.

FIG. 5 is a configuration diagram of an air conditioner converter according to the third embodiment.

FIG. 6 is a configuration diagram of an air conditioner converter according to a fourth embodiment.

FIG. 7 is a configuration diagram of an air conditioner converter according to a fifth embodiment.

FIG. 8 is a configuration diagram of a conventional air conditioner.

FIG. 9 is a state diagram of a refrigeration cycle of the air conditioner converter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Adapter 2 Liquid pipe 3 Gas pipe 4 Bypass pipe 7 Stop valve 8 Check valve 9 Flow control valve 10a valve 10b valve 11 Pressure control valve

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F25B 13/00 331 F25B 7/00 F25B 1/00 331 F25B 40/00

Claims (5)

(57) [Claims] A first passage through which a refrigerant passes;
Means for performing heat exchange, and means for performing heat exchange between the two paths.
Comprising a connection port to both ends of the road, the bypass passage to one of the passages, air-conditioning machine converter ing provided a valve in the bypass passage. 2. A formed by providing a check valve in the bypass passage claim 1 Symbol mounting air conditioner for transducers. Wherein the bypass passage formed by providing a flow control valve according to claim 1 Symbol mounting air conditioner for transducers. 4. A formed by providing a valve at both ends of the passage which can be bypassed by the bypass passage according to claim 1, 2 or <br/> transducers for the 3 wherein the air conditioner. 5. A pressure-operated valve is provided in a passage which can be bypassed by a bypass passage.
3 or 4 air conditioner for converter according.