JPH01306776A - Coolant heating type cooling and heating device - Google Patents

Abstract

PURPOSE:To attain a heating operation with low running and maintenance costs, by circulating coolant by the pressure of coolant that evaporates in a coolant heater without operation of a compressor during heating operation, and to maintain the cooling capacity and to guarantee the reliability, by storing excess coolant in a heat-driven type heat transfer block during cooling operation. CONSTITUTION:During heating operation, coolant is heated in a coolant heater 20 by burning of a burner 27, and the coolant in gas-liquid mixed state enters into a gas-liquid separator 17. The gas coolant discharged from a gas outlet 24 enters a room heat exchanger 14 through a four-way valve 25, and enters a receiver part 12 through a coolant pipe 15 after condensed into liquid coolant. After that, when a pressure introducing valve 11 is opened, the evaporation pressure generated by a coolant heater 20 is applied to the receiver part 12 to fall the liquid coolant down into the gas-liquid separator 17 through No.2 check valve 16, and the liquid coolant is sent to the coolant heater 20 through a coolant pipe 19, so that the heating cycle is repeated. As the excess coolant during cooling operation is stored in a heat-driven type heat transfer block 22, another storage part is not provided.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an apparatus for heating and cooling an indoor and outdoor unit by connecting refrigerant piping, and particularly to a heating and cooling apparatus that heats a refrigerant with a burner or the like to heat an indoor unit. It is related to.

BACKGROUND OF THE INVENTION Heat pump air conditioners, which have been put into practical use, are the mainstream devices for heating and cooling by connecting indoor and outdoor units with refrigerant piping. However, in the case of heat pump air conditioners, heating is the most necessary.

There are issues with heating operation, such as a decrease in capacity at low outside temperatures and the need to temporarily stop heating and remove the box to remove frost from the outdoor heat exchanger. is left behind. In order to solve the heating problems of heat pump air conditioners as described above, a method has been proposed in which a gas or oil burner heats a refrigerant and a compressor transports the heat to an indoor unit for heating. This method is shown in FIG. 1 is a compressor, 2 is a four-way valve, 3 is an outdoor heat exchanger, 4 is a check valve, 5 is a pressure reducing device, 6 is an indoor heat exchanger, and an on-off valve 7 and a burner 8 are installed in parallel with the outdoor heat exchanger. The refrigerant heater 9 is provided with a refrigerant heater 9, and the refrigerant flows in the direction of the solid line arrow during heating and in the direction of the broken line arrow during cooling.

In the above configuration, during heating operation, the gas refrigerant heated and evaporated by the combustion heat of the burner 8 in the refrigerant heater 9 is sent to the indoor heat exchanger 6 by the operation of the compressor 1 to radiate heat,
The condensed and liquefied refrigerant is returned to the refrigerant heater 9. Also,
During cooling operation, the high-temperature, high-pressure gas refrigerant discharged from the compressor 1 is passed through the outdoor heat exchanger 3 to radiate heat and liquefy the refrigerant.The refrigerant pressure is reduced by the pressure reducing device 5, and the refrigerant is sent to the indoor heat exchanger 6 for cooling. The gas refrigerant that has absorbed heat and evaporated is sucked into the compressor 1 and circulated.

Problems to be Solved by the Invention However, in the above configuration, during heating operation, fuel such as oil or city gas is burned in the burner 8 and the refrigerant is heated in the refrigerant heater 9, and the refrigerant is also transported. The operating cost of the compressor 1 for this purpose is high, and the heating operation and maintenance costs are high.

The present invention solves the above-mentioned conventional problems. During heating operation, the compressor is not operated, but the refrigerant is thermally driven by the pressure of the refrigerant evaporated by the refrigerant heater, and the refrigerant is circulated to transfer heat. The purpose of this system is to provide low-maintenance heating and highly reliable cooling.

Means for Solving the Problems In order to solve the above problems, the refrigerant heating heating/cooling machine of the present invention includes a first check valve, a receiver with a pressure introduction valve, a second check valve, a liquid separator, and a refrigerant heater. A heating circuit is formed by connecting a heat-driven heat transfer block and an indoor heat exchanger with refrigerant piping, and a refrigerant pipe is connected between the outdoor heat exchanger and a pressure reduction device to form a heating circuit. The air conditioner, the outdoor heat exchanger, the heat-driven heat transfer block, the pressure reducing device, and the indoor heat exchanger are sequentially connected to refrigerant piping to form a cooling circuit.

According to the above-described configuration, the present invention uses the increase in evaporation pressure generated by heating and evaporating the refrigerant with the combustion heat of the burner in the refrigerant heater during heating operation to transfer the gas refrigerant to the indoor heat exchanger through the gas-liquid separator. The liquid refrigerant, which flows into the indoor heat exchanger and liquefies heat radiation, is sent to a receiver equipped with a pressure introduction valve through a first check valve. Here, the pressure introduction valve is opened to allow the evaporation pressure generated in the refrigerant heater to act on the receiver section to send liquid refrigerant to the refrigerant heater, and the pressure introduction valve is closed to apply the evaporation pressure generated in the refrigerant heater to the indoor heat exchanger. Introduce liquid refrigerant from

In this way, during heating, a heat-driven type of heat transfer that heats and pressurizes the refrigerant using the combustion heat of the burner and pumps the refrigerant indoors is performed without a pump, making it unnecessary to operate the compressor.

During cooling, the cooling is based on a refrigeration cycle with the same compressor operation as before, but a heat-driven heat transfer block for heating is located on the outlet side of the outdoor heat exchanger, and excess refrigerant during cooling is transferred to a heat-driven heat transfer block. It is stored in blocks to ensure the ability and reliability of cooling operation.

Example Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, 10 indicates a pressure introduction valve 11 and a receiver section 1.
2, 1a is a refrigerant pipe 1 that connects the indoor heat exchanger 14 and the receiver 10 with a pressure introduction valve;
5 is the first check valve provided, and 16 is the receiver 1 with a pressure introduction valve.
19 is a refrigerant pipe that connects the gas-liquid separator 17 and the inlet side of the refrigerant heater 20, and the outlet of the refrigerant heater 20. side, pressure introduction valve 11 and gas-liquid separator 1
7 through a refrigerant pipe 21.

22 is a heat-driven heat transfer block having a first check valve 13, a receiver 10 with a pressure introduction valve, a second check valve 16, a gas-liquid separator 17, and a refrigerant heater 20; A third check valve is provided on the refrigerant pipe 26 that connects the indoor heat exchanger 14 via the gas outlet pipe 24 and the four-way valve 25, 27 is the burner provided on the refrigerant heater 20, and 2nd is the indoor heat exchanger 14. This is a blower installed in the 29 is the compressor 30
and a fourth check valve provided in the refrigerant pipe 31 that connects the part connecting the third check valve 23 and the four-way valve 25 of the refrigerant pipe 26, and 32 is the artificial side of the four-way valve 25 and the outdoor heat exchanger a3. The first on-off valve 35 is provided on the refrigerant pipe 34 that connects the outlet side of the outdoor heat exchanger 33 and the heat drive ire! ! This is a second opening/closing valve provided on a refrigerant pipe 36 that connects the type heat transfer block 22, and one end of the refrigerant pipe 36 is connected to the refrigerant pipe 21 of the heat driven type heat transfer block 22.

37 is a refrigerant pipe that connects the inlet side of the refrigerant heater 20 with the refrigerant pipe 15 that connects the first check valve 13 and the indoor heat exchanger 14, and has a third on-off valve 38 and a pressure reducing device 39. . 40 connects the four-way valve 25 and compressor 30 to the Akinimulator 4
This is a refrigerant pipe connected via 1. 42 is a blower provided in the outdoor heat exchanger 33.

In this configuration, the operation during heating operation will be described first.

Gas-liquid two-phase refrigerant heated in the refrigerant heater 20 by combustion in the burner 27 enters the gas-liquid separator 17, and the gas refrigerant passes through the gas outlet pipe 24 through the refrigerant pipe 26 to the third check valve and the four-way valve 25. and flows into the indoor heat exchanger 14. Here, the heat is radiated and liquefied by the operation of the blower 2B, and the liquid refrigerant becomes a supercooled liquid refrigerant that passes through the refrigerant pipe 15 and passes through the first check valve 13. When the pressure introduction valve 11 is closed, the receiver part 12
The gaseous refrigerant contained in the refrigerant is condensed into supercooled liquid refrigerant and then flows into the refrigerant. Thereafter, when the pressure introduction valve 11 is opened, the liquid refrigerant is heated and evaporated in the refrigerant heater 20, and the generated evaporation pressure is applied to the receiver section 12 through the refrigerant pipe 21, and the liquid refrigerant that has been flowing is removed from the second check valve. 16 to the gas-liquid separator 17, and the liquid refrigerant is sent to the refrigerant heater 20 through the refrigerant pipe 19, thereby repeating the heating cycle. In this way, the heating operation is a pump-less method that sends heat indoors without operating the compressor 30 by repeatedly opening and closing the pressure introduction valve 11 and by increasing the pressure when the refrigerant evaporates due to the combustion heat of the burner 27. Drive-type heat transfer is performed.

Next, the cooling operation will be explained.

During cooling operation, the gas refrigerant discharged at high temperature and high pressure by the operation of the compressor 30 is guided to the outdoor heat exchanger 33 through the refrigerant pipes 31 and 34, through the fourth check valve, the four-way valve 25, and the first on-off valve 32. By operating the blower 42, the heat is radiated and liquefied, and the refrigerant passes through the refrigerant pipe 36 and is guided to the heat-driven heat transfer block 22 via the second on-off valve 35. The liquefied refrigerant is transferred to the receiver i12. The refrigerant enters the gas-liquid separator 17 or the refrigerant heater 20, passes through the third on-off valve 38 of the refrigerant pipe 37, becomes a low-pressure refrigerant by the pressure reducing device 39, and enters the indoor heat exchanger 14. Here, the refrigerant collected by operating the blower 28 to perform a cooling action and evaporated into gas passes through the four-way valve 25 and returns to the compressor 30 from the accumulator 41 . In this way, air conditioning performs a refrigeration cycle by operating a compressor, and in order to guarantee this heat-driven heat transfer, the degree of supercooling of the liquid refrigerant that is condensed and liquefied in the indoor heat exchanger 14 is important. The degree of cooling needs to be greater than the refrigerant heating by conventional heat pump air conditioners or compressor operation, and therefore a large amount of refrigerant in the heating circuit is required for heating operation.

The amount of refrigerant during heating is larger than the amount of refrigerant required for cooling operation, and it is important to prevent a decrease in cooling capacity due to excess refrigerant during cooling operation, and furthermore, to prevent damage to equipment due to liquid compression. In the refrigerant heating heating/cooling machine of the present invention, the excess refrigerant during cooling is removed from the heat-driven heat transfer block 2 which is a part of the heating circuit.
By making 2 a liquid refrigerant storage part, it is possible to cope with this problem without particularly providing a new liquid refrigerant storage part 7, and the performance and reliability of the cooling operation are guaranteed.

Furthermore, during cooling operation, a large amount of refrigerant is kept in the heating circuit during heating, so even when switching from cooling to heating operation, there is a large amount of refrigerant in the heating circuit, so the refrigerant accumulated in the cooling circuit is exchanged with outdoor heat. Since only the refrigerant is stored in the container, the pump-down operation to pump this refrigerant into the heating circuit is easy and can be performed in a short time, so it has the effect of being able to go from pump-down to starting heating operation in a very short time.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a refrigerant heating/cooling device according to an embodiment of the present invention, and FIG. 2 is a diagram of a conventional heating/cooling device. 10...Heat-driven heat transfer block, 1o...
...Receiver with pressure introduction valve, 13...First check valve, 14...Indoor heat exchanger, 16...
・Second check valve, 17... Gas-liquid separator, 20
... Refrigerant heater, 30 ... Compressor, 3
3... Outdoor heat exchanger, 39... Pressure reduction device. Name of agent: Patent attorney Toshi Nakao (1 person)
・-Shishioki Trap 9S Shi Deaf Seyaku Bunryo Fukub Fuku 13-゛No. 11
i stop cell 16-name Z note stop cell 17...Ki ye yaha 0 regu y-Reijo Kasoufu 30- Koto machine

Claims (1)

[Claims] A heating circuit is formed by connecting a heat-driven heat transfer block having a first check valve, a receiver with a pressure introduction valve, a second check valve, a gas-liquid separator, a refrigerant heater, and an indoor heat exchanger with refrigerant piping. In addition, the heat-driven heat transfer block has a refrigerant pipe connected between the outdoor heat exchanger and the pressure reducing device, and connects the compressor, the outdoor heat exchanger, the heat-driven heat transfer block, the pressure reduction device, and the indoor heat exchanger. A refrigerant-heating heating/cooling machine in which a cooling circuit is formed by sequentially connecting refrigerant piping.