JPS62284160A - 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 3. Detailed Description of the Invention Industrial Application of Heat The present invention relates to an air-conditioning and heating apparatus that operates using a vapor compression method during cooling and a non-powered heat transfer method during heating.

BACKGROUND OF THE INVENTION Conventional heat pump air conditioning systems have the disadvantage that during heating operation, the evaporation temperature of the refrigerant decreases as the outside air temperature decreases, and as a result, the refrigerant circulation to the condenser decreases, resulting in a decrease in heating capacity. In order to supplement the heating capacity when the outside air temperature decreases, a method is known in which the refrigerant is heated by combustion heat instead of the refrigerant absorbing heat from atmospheric heat during heating to prevent the heating capacity from decreasing. This method is shown in FIG. 1 is a compressor, 2
is a four-way valve, a is an outdoor heat exchanger, 4 is a back pressure valve, 5 is a pressure reducing device, 6 is an indoor heat exchanger, and has a cycle configuration in which a refrigerant heater 7 is provided in parallel with the outdoor heat exchanger 3. During cooling, the refrigerant flows in the direction of the solid arrow, and during heating, the refrigerant flows in the direction of the dashed arrow. Note that 8.9 is a solenoid valve. According to the above configuration, a refrigerant heater is required in addition to the conventional outdoor heat exchanger, and the refrigerant is further transported by a compressor, which poses a problem in terms of initial cost and running cost. Furthermore, in order to compensate for the decrease in heating capacity at low outside temperatures, a heating device as shown in Fig. 3 has been proposed.
(No. 9627) This system sends the liquefied refrigerant in the heating main circulation circuit, which consists of a compressor 10, a condenser 11, a pressure reducer 12, and an evaporator 13, to a liquid receiver 14 via a first check valve 15, and then a control opening/closing valve 16. , that is, when the control on-off valve 16 is open, the liquid refrigerant accumulated in the liquid receiver 14 is transferred to the second inverse ratio valve 1.
7 to the heater 18, and at this time, since the pressure of the receiver 14 and the heater 1 are equalized, the first
The check valve 15 prevents liquid refrigerant from flowing into the liquid receiver 14 from the heating main circulation circuit, and when the liquid refrigerant in the liquid receiver 14 runs out, the control valve 16 is closed and the liquid refrigerant flows into the liquid receiver 14 from the heating main circulation circuit. The liquid refrigerant is caused to flow through the first check valve 15 (at this time, the pressure of the heater 18 is higher than the pressure of the liquid receiver 14, so the liquid refrigerant
The inflow liquid refrigerant of 4-\ is supplied to the heater 18 by the second check valve 17.
It does not flow into. ) When the liquid refrigerant accumulates in the liquid receiver 14, the control valve 16 is opened again to supply the liquid refrigerant to the heater 18. That is, liquid refrigerant is intermittently supplied to the heater 18 from the liquid receiver 14, and the refrigerant gas that has absorbed heat and evaporated in the heater 18 is sent to the condenser 11 together with the discharge gas of the compressor 10 to improve the condensation capacity at low outside temperatures. Efforts are being made to prevent the decline.

Problems to be Solved by the Invention However, in the configuration shown in FIG. 3, it is necessary to operate the compressor during heating operation as in the configuration shown in FIG. If the circuit is operated in such a state that the gas generated in the heater 18 is sent under pressure to the condenser 11 and receiver 14, refrigerant flows into the compressor 10 or the evaporator 4 (%B'), which is a problem.

The present invention solves the problems of the conventional technology by operating a non-powered heat medium transfer system during heating, thereby reducing the running cost of heating operation, and reducing refrigerant accumulation in the idle compressor and idle heat exchanger during heating. The purpose of this system is to reduce the size of the conventional outdoor heat exchanger by preventing condensation and by using the refrigerant heater as a condenser during cooling operation, making the outdoor unit smaller and more compact, and reducing initial costs. It is.

Means for Solving the Problems In order to solve the above problems, the air conditioning system of the present invention includes a compressor, a first heat exchanger serving as a condenser during cooling, a first check valve,
A second heat exchanger that serves as a condenser during cooling and a heater during heating;
The refrigeration cycle includes a solenoid valve, a pressure reducing device, an indoor heat exchanger, a second solenoid valve, and an accumulator. A second check valve, a liquid receiver, and a third check valve are connected, and a second check valve is connected between the second solenoid valve and the indoor heat exchanger, and between the first check valve and the second heat exchanger. A heating pipe line including three solenoid valves is provided, and the third solenoid valve and the second solenoid valve are connected to each other.
The circuit has a circuit configuration in which a pressure equalizing valve 8 for closing an on-off valve is disposed between the heating pipe connecting the heat exchanger and the liquid receiver.

Effect The present invention is configured such that the second heat exchanger functions as a condenser during cooling and a heater during heating due to the above-described configuration. The heat exchanger) is made smaller and more compact, which reduces the initial cost (this also solves the problem of refrigerant accumulating in the compressor and the first heat exchanger during heating operation. The heating cycle is completely separated from the compressor and the first heat exchanger by the stop valve and the second electromagnetic valve, and the refrigerant gasified in the second heat exchanger that acts as a refrigerant heater is sent under pressure to the indoor heat exchanger. A non-powered heat transfer operation is possible in which the heat is returned to the liquid receiver and is again supplied to the second heat exchanger, resulting in lower running costs during heating operation.

EXAMPLES Hereinafter, examples of the present invention will be explained based on illustrated diagrams with silkworms.

In FIG. 1, 19 is a compressor, 20 is a first heat exchanger which becomes a condenser during cooling operation, 21 is a first check valve, 22 is a condenser during cooling operation, and a first heat exchanger which becomes a refrigerant heater during heating operation. 2 heat exchangers, 23 a first solenoid valve, 24 a pressure reducing device, 25 an indoor heat exchanger, 26 a second solenoid valve, and 27 an accumulator, forming a refrigeration cycle. 28 is a second check valve which is in contact with the liquid receiver 29 located at a higher position than the second heat exchanger 22 in the forward direction from the refrigeration cycle, and which is omitted;
A third check valve 30 is connected in the forward direction from the liquid receiver 29 to the refrigeration cycle, and is arranged in parallel with the first electromagnetic valve 23 and the pressure reducing device 24. Reference numeral 31 denotes a heating pipe line 3 that connects between the first check valve 21 and the second heat exchanger and between the indoor heat exchanger 25 and the second electromagnetic valve 26.
2 is a third solenoid valve, and 33 is the third solenoid valve 3.
2 and the second heat exchanger 22 and the liquid receiver 29
This is an on-off valve disposed in the pressure equalizing pipe 34 connecting the two.

In the above configuration, during cooling operation, the first solenoid valve 23 and the second solenoid valve 26 are open, the on-off valve 3a and the 3'4E solenoid valve 31 are closed, and the refrigerant that has become high temperature and high pressure in the compressor 19 is It is condensed and liquefied in the first heat exchanger 20 and the second heat exchanger 22, expanded under reduced pressure in the depressurizer 24, gasified in the indoor heat exchanger 25, and passed through the accumulator 27 to the compressor 19. At this time, receiver 2
The liquid refrigerant does not flow into the refrigerant 9 due to the second check valve 30. On the other hand, during heating operation, the first solenoid valve 23 and the second solenoid valve 26 are closed.
The third electric dispensing valve a1 is in an open state, and the on-off valve 33 repeats the opening and closing operation. During heating operation, the refrigerant evaporated and gasified in the second heat exchanger 22, which serves as a refrigerant heater, passes through the heating pipe line 32, is sent under pressure to the indoor heat exchanger 25, and is condensed and liquefied. At this time, the on-off valve 33
is in a closed state, and the condensed liquefied refrigerant flows through the second check valve 2.
The liquid passes through the day and accumulates in the liquid receiver 29. At this time, the liquid refrigerant flowing into the liquid receiver 29 is prevented from flowing into the second heat exchanger 22 by the first check valve 21 because the pressure of the second heat exchanger 22 serving as a refrigerant heater is high. Next, when the liquid refrigerant finishes collecting in the liquid receiver 29, the on-off valve 33 is opened, and the second heat exchanger 22 and the liquid receiver 29 are balanced at R:34, and the second heat exchanger is started. Vessel 2
The liquid refrigerant in the liquid receiver 29 installed at a higher position than the second heat exchanger 22 is supplied by its own weight to the second heat exchanger 22. At this time, the second check valve 28 prevents the condensed refrigerant from the indoor heat exchanger 25 from flowing into the receiver 29 . When the supply of the liquid refrigerant from the liquid receiver 29 to the second heat exchanger 22 is finished, the on-off valve is closed again, and the refrigerant evaporated and gasified in the second heat exchanger is sent under pressure to the indoor heat exchanger 25 and the same cycle is repeated. . As described above, the system of this embodiment operates using the vapor compression method during cooling, and operates using the non-powered heat transfer method during heating. Since it is configured to act as a condenser during operation, the first heat exchanger, which is the condenser during cooling operation, can be made smaller and more compact, which has the effect of reducing running costs during heating operation and the initial cost of the system. .

Also, during heating operation, the second solenoid valve 26 is closed, and together with the first check valve 21, the compressor 19 and the first heat exchanger 20 are closed.
This has the effect of preventing refrigerant from accumulating in the system and improving system reliability.

Effects of the Invention As described above, according to the air conditioning system of the present invention, it is possible to operate using the vapor compression method during cooling operation and the non-powered heat medium transfer method during heating operation. Since the heat exchanger is configured to act as a condenser during cooling operation, the first heat exchanger, which is the condenser during cooling operation, can be made smaller and more compact, reducing running costs during heating operation and the initial cost of the system. There is an effect that can be achieved. Furthermore, the first check valve and the second solenoid valve prevent refrigerant from accumulating in the compressor and first heat exchanger during heating operation, thereby improving the reliability of the system.

In addition, since this system provides stable heating capacity without being affected by outside air temperature during heating, it can be used as an air conditioning system for cold regions with a small cooling load, making it possible to downsize the pressure and JJ and reduce the cost of the system. It's also effective.

[Brief explanation of drawings]

Figure g1 is a circuit configuration diagram of an air conditioning system according to an embodiment of the present invention, FIG. 2 is a circuit configuration diagram of a conventional air conditioning system, and FIG. 3 is a circuit configuration diagram of a conventional heating system. 19... Compressor, 20... First heat exchanger, 21... First check valve, 22... Second heat exchanger, 23...First solenoid valve, 24...
... Pressure reduction device, 25 ... Indoor heat exchanger, 26
...Second solenoid valve, 28...Second check valve, 29...Liquid receiver, 30...Third check valve, 31. ...Third solenoid valve, 32...Heating pipe line, 33...Opening/closing valve, 34...Pressure equalization pipe.

Claims (3)

[Claims] (1) Compressor, first heat exchanger that serves as a condenser during cooling, first
It has a refrigeration cycle consisting of a check valve, a condenser during cooling, a second heat exchanger serving as a refrigerant heater during heating, a first solenoid valve, a pressure reducing device, an indoor heat exchanger, a second solenoid valve, and an accumulator,
A second check valve, a liquid receiver, and a third check valve are connected in parallel with the first solenoid valve and the pressure reducing device from between the pressure reducing device and the indoor heat exchanger, and a second check valve, a liquid receiver, and a third check valve are connected between the second solenoid valve and the indoor heat exchanger. A heating pipeline having a third solenoid valve is disposed between the heat exchanger and between the first check valve and the second heat exchanger, and the third solenoid valve and the second heat exchanger An air-conditioning and heating system comprising a pressure equalizing pipe having an on-off valve arranged between the heating pipe line connecting the liquid receiver and the liquid receiver. (2) The first check valve controls the discharge direction of the compressor, the second check valve controls the direction from the refrigeration cycle to the liquid receiver, and the third check valve controls the direction from the liquid receiver to the refrigeration cycle. The heating and cooling device according to claim 1, wherein the heating and cooling device is arranged so that the directions thereof are in the forward direction. (3) The air-conditioning device according to claim 1, wherein the liquid receiver is arranged at a higher position than the second heat exchanger.