JPH0760026B2 - Refrigerant heating warmer / cooler - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cooling and heating by connecting indoor and outdoor units with refrigerant pipes, and particularly to a heating and cooling apparatus for heating a refrigerant with a burner or the like to heat the indoor unit. It is about.

2. Description of the Related Art A heat pump air conditioner that is generally put into practical use is the mainstream as a device for heating and cooling by connecting indoor and outdoor units with a refrigerant pipe. However, in the case of a heat pump air conditioner, the capacity decreases at the low outdoor temperature when heating is the most necessary, and heating is temporarily stopped to defrost the outdoor heat exchanger, requiring defrosting operation. However, there are problems in heating operation. In order to solve the above heating pump air conditioner heating problems, gas,
A method has been proposed in which a refrigerant is heated by an oil burner and heat is transferred to an indoor unit by a compressor. 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,
A refrigerant heater 9 having an on-off valve 7 and a burner 8 is provided in parallel with the outdoor heat exchanger.
During cooling, the refrigerant flows in the direction of the dashed arrow.

In the above configuration, during the 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 the cooling operation, the high-temperature high-pressure gas refrigerant discharged from the compressor 1 is passed through the outdoor heat exchanger 3 to radiate and radiate the refrigerant, and the refrigerant pressure is reduced by the decompression device 5 to be sent to the indoor heat exchanger 6 for cooling. The gas refrigerant that has absorbed heat and evaporated has been sucked into the compressor 1 and circulated.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the configuration described above, not only the fuel such as oil or city gas is burned by the burner 8 to heat the refrigerant by the refrigerant heater 9 but also the refrigerant is conveyed during the heating operation. Therefore, there is a problem that the operating cost of the compressor 1 is increased and the heating operation maintenance cost is increased.

The present invention solves the conventional problems as described above, and operates by performing heat driving by circulating the refrigerant by heat-driving with the refrigerant pressure evaporated in the refrigerant heater without operating the compressor during heating operation. The purpose is to perform heating with low maintenance costs and to configure cooling with high reliability.

Means for Solving the Problems In order to solve the above problems, the refrigerant heating / cooling machine of the present invention has a refrigerant heater and a gas-liquid separator arranged above the same connected in an annular pipe, and above the gas-liquid separator. To the second
A receiver with a pressure introducing valve having a pressure introducing valve is arranged via a check valve, a first check valve is connected to an outlet side of the pressure introducing valve, and an inlet side of the pressure introducing valve communicates with a refrigerant heater. With the heat-driven heat transfer block, the gas-liquid separator, the four-way valve, the indoor heat exchanger, and the first check valve of the heat-driven heat transfer block are connected by piping to form a heating circuit, Compressor, the four-way valve, the first on-off valve, the outdoor heat exchanger,
A second on-off valve, the heat-driven transfer block, a third on-off valve,
A decompressor, the indoor heat exchanger, and the four-way valve are connected to the four-way valve in an annular pipe connection to additionally connect a cooling circuit, and the heat-driven heat transfer block connects the refrigerant heater outlet side to the outdoor heat exchanger, The refrigerant heater inlet side is connected to the pressure reducing device.

Effect The present invention has the above-described configuration, and uses the evaporation pressure increase generated by heating and evaporating the refrigerant by the combustion heat of the burner in the refrigerant heater during the heating operation, and the gas refrigerant to the indoor heat exchanger through the gas-liquid separator. The liquid refrigerant that is pressure-fed and further flows into the indoor heat exchanger to radiate heat and is liquefied is fed to the receiver with a pressure introduction valve through the first check valve. Here, the pressure introduction valve is opened to cause the evaporation pressure generated in the refrigerant heater to act on the receiver part to send the liquid refrigerant to the refrigerant heater, and the pressure introduction valve is closed to form an indoor heat exchanger in the receiver part. The liquid refrigerant from is introduced.

In this way, heat-driven heat transfer for heating and boosting the refrigerant by the combustion heat of the burner and pumping the refrigerant to the indoor side is performed without a pump during heating, and the operation of the compressor is unnecessary.

When cooling, the cooling is based on the refrigeration cycle by operating the compressor as in the conventional system, but a heat-driven heat transfer block for heating is placed on the outlet side of the outdoor heat exchanger to transfer excess refrigerant to the heat-driven heat transfer during cooling. The blocks are stored to ensure the cooling operation capacity and maintain reliability.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 10 is a receiver with a pressure introducing valve consisting of a pressure introducing valve 11 and a receiver section 12, 13 is a first refrigerant provided in a refrigerant pipe 15 connecting the indoor heat exchanger 14 and the receiver with a pressure introducing valve 10.
Check valve, 16 is receiver 10 with pressure introducing valve and gas-liquid separator
A second check valve provided in the refrigerant pipe 18 connecting the 17 and 19 is a refrigerant pipe connecting the gas-liquid separator 17 and the inlet side of the refrigerant heater 20, and the outlet side of the refrigerant heater 20 and the pressure introducing valve. Refrigerant pipe 21 connects 11 and gas-liquid separator 17.
Reference numeral 22 is a pressure introduction valve having a refrigerant heater 20 and a gas-liquid separator 17 arranged above the same connected in an annular pipe, and having a pressure introduction valve 11 above the gas-liquid separator 17 via a second check valve 16. The receiver 10 is provided, the first check valve 13 is connected to the outlet side of the pressure introducing valve 11, and the inlet side of the pressure introducing valve 11 is a heat-driven heat transfer block in communication with the refrigerant heater 20. Yes, 23
Is a third check valve provided in the refrigerant pipe 26 connecting the indoor heat exchanger 14 via the gas outlet pipe 24 of the gas-liquid separator 17 and the four-way valve 25, and the gas-liquid separator of the heat-driven heat transfer block 22.
17, the four-way valve 25, the indoor heat exchanger 14, and the first check valve 13 of the heat-driven heat transfer block 22 are sequentially connected by piping to form a heating circuit. Reference numeral 27 is a burner provided in the refrigerant heater 20, and 28 is a blower provided in the indoor heat exchanger 14. 29 is a compressor 30,
A fourth check valve provided in the refrigerant pipe 31 that connects the portion of the refrigerant pipe 26 that connects the third check valve 23 and the four-way valve 25, and 32 is the inlet side of the four-way valve 25 and the outdoor heat exchanger 33. Refrigerant piping 34 to connect
Is a second opening / closing valve provided in the refrigerant pipe 36 connecting the outlet side of the outdoor heat exchanger 33 and the heat-driven heat transfer block 22. One end of the refrigerant pipe 36 is thermally driven. It is connected to the refrigerant pipe 21 of the mold heat transfer block 22.

37 is a refrigerant pipe connecting the first check valve 13 and the indoor heat exchanger 14.
It is a refrigerant pipe that connects 15 and the inlet side of the refrigerant heater 20, and has a third opening / closing valve 38 and a pressure reducing device 39. Reference numeral 40 is a refrigerant pipe that connects the four-way valve 25 and the compressor 30 via an accumulator 41. Thus, the compressor 30, the four-way valve 25, the outdoor heat exchanger 33, the heat-driven heat transfer block 22, the pressure reducing device 39,
The indoor heat exchanger 14, the four-way valve 25, the accumulator 41, and the compressor 30 are sequentially connected in an annular pipe to additionally connect a cooling circuit, and the heat-driven heat transfer block 22 of the refrigerant heater 20 with respect to the cooling circuit. The outlet side is connected to the outdoor heat exchanger 33, and the refrigerant heater inlet side is connected to the pressure reducing device 39. 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 2 heated by refrigerant heater 20 due to combustion of burner 27
The refrigerant in the phase state enters the gas-liquid separator 17, and the gas outlet pipe 24
More gas refrigerant through the refrigerant pipe 26 third check valve 23, four-way valve
It flows into the indoor heat exchanger 14 through 25. Blower here 28
When the pressure introduction valve 11 is closed via the first check valve 13 through the refrigerant pipe 15, it becomes a liquid refrigerant in the supercooled state by the operation of The refrigerant is condensed by the supercooled liquid refrigerant and flows in. After that, when the pressure introduction valve 11 is opened, the evaporation pressure generated by heating and evaporating the liquid refrigerant in the refrigerant heater 20 is applied to the receiver section 12 via the refrigerant pipe 21, and the liquid refrigerant flowing in the second check valve.
The heating cycle is repeated by dropping the liquid refrigerant through 16 into the gas-liquid separator 17 and sending the liquid refrigerant to the refrigerant heater 20 through the refrigerant pipe 19. In this way, the heating operation sends heat to the indoor side without a pump by repeating the opening / closing operation of the pressure introduction valve 11 without operating the compressor 30 and the pressure increase when the refrigerant evaporates due to the combustion heat of the burner 27. Driven heat transfer is performed.

Next, the cooling operation will be described.

During the cooling operation, the gas refrigerant discharged at high temperature and high pressure by the operation of the compressor 30 is connected to the fourth check valve 29 through the refrigerant pipes 31 and 34.
It guides to the outdoor heat exchanger 33 through the four-way valve 25 and the first on-off valve 32, and radiates heat to be liquefied by the operation of the blower 42,
It is led to the heat-driven heat transfer block 22 through the refrigerant pipe 36 and the second opening / closing valve 35. The liquefied refrigerant here is the receiver unit 12,
After entering the gas-liquid separator 17 or the refrigerant heater 20, the refrigerant enters the indoor heat exchanger 14 through the third opening / closing valve 38 of the refrigerant pipe 37 to become a low-pressure refrigerant by the pressure reducing device 39. Here, the refrigerant that has collected heat by the operation of the blower 28 to perform a cooling action and has been vaporized and gasified passes through the four-way valve 25 and the compressor 30 from the accumulator 41.
Return to. In this way, the cooling performs a refrigeration cycle by operating the compressor.

Effects of the Invention In the refrigerant heating / cooling machine of the present invention, the degree of subcooling of the liquid refrigerant condensed and liquefied in the indoor heat exchanger 14 is important in order to ensure this heat-driven heat transfer during heating operation. The degree of cooling needs to be higher than the heating of the refrigerant by the operation of the conventional heat pump air conditioner or the compressor, and therefore a large amount of the refrigerant in the heating circuit is required for the heating operation.

Since the amount of refrigerant during heating becomes larger than the amount of refrigerant required for cooling operation, it is important to reduce cooling capacity due to excess refrigerant during cooling operation and to prevent equipment damage due to liquid compression. In the refrigerant heating / cooling machine of the present invention, the excess refrigerant at the time of cooling is controlled by the heat-driven heat transfer block 22 which is a part of the heating circuit.
By adopting as the liquid refrigerant containing portion, it is possible to cope with the liquid refrigerant containing portion without providing a new liquid refrigerant containing portion, and the performance and reliability of the cooling operation are guaranteed.

Furthermore, since a large amount of refrigerant is kept in the heating circuit during heating during cooling operation, there is a large amount of refrigerant in the heating circuit even when switching from cooling to heating operation. Since there is only the refrigerant accumulated in the container, the pump down operation of pumping this refrigerant into the heating circuit is easy and can be performed in a short time. Therefore, there is an effect that the pump down to the heating operation can be started in a very short time.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a refrigerant heating / cooling machine according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of a conventional heating / cooling machine. 22 …… Heat-driven heat transfer block, 10 …… 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, 33 …… Outdoor heat exchanger, 39 …… Decompressor.

Claims (1)

[Claims] 1. A receiver with a pressure introducing valve having a refrigerant heater and a gas-liquid separator arranged above the same connected in an annular pipe, and having a pressure introducing valve above the gas-liquid separator via a second check valve. Is disposed on the outlet side of the pressure introducing valve.
A check valve is connected, and the inlet side of the pressure introduction valve is a heat-driven heat transfer block in communication with a refrigerant heater, the gas-liquid separator of this heat-driven heat transfer block, a four-way valve, and an indoor heat exchanger. A pipe is connected to the first check valve to form a heating circuit, and a compressor, the four-way valve, a first opening / closing valve, an outdoor heat exchanger, a second opening / closing valve, the heat-driven heat transfer block, 3 An on-off valve, a pressure reducing device, the indoor heat exchanger, and the four-way valve are sequentially connected in an annular pipe to additionally connect a cooling circuit, and the heat-driven heat transfer block has an outdoor heat exchanger on the refrigerant heater outlet side. And a refrigerant heating / cooling machine in which the inlet side of the refrigerant heater is connected to the pressure reducing device.