JPH086976B2 - Heating and cooling machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heating / cooling device in which a compressor, a pressure reducing mechanism, an outdoor unit, an indoor unit, etc. are annularly piped with a refrigerant, and in particular, an outdoor unit is provided with a refrigerant heater with a burner. It relates to a heating / cooling machine that is designed to be heated.

2. Description of the Related Art The conventional heat pump heating / cooling system has a drawback that the evaporation temperature of the refrigerant decreases as the outside air temperature decreases during heating operation, and as a result, the refrigerant circulation amount to the condenser decreases and the heating capacity decreases. It was In order to supplement the heating capacity when the outside air temperature decreases, a method is known in which during heating, the refrigerant is heated by combustion heat instead of heat absorption of the refrigerant from atmospheric heat to prevent the heating capacity from decreasing. This method is shown in FIG. 1 is a compressor, 2 is a four-way valve, 3 is an outdoor heat exchanger with a fan, 4 is a check valve, 5 is a pressure reducing device, 6 is an indoor heat exchanger, and a refrigerant is provided in parallel with the outdoor heat exchanger with a fan 3. The heater 7 is provided in a cycle configuration, and the refrigerant flows in the direction of a solid arrow during heating and in the direction of a broken arrow during cooling. In addition, 8 and 9 are solenoid valves.

In the above-described configuration, during heating operation, the refrigerant gas heated and evaporated in the refrigerant heater 7 operates the compressor 1 to be sent to the indoor heat exchanger 6, and the condensed and liquefied refrigerant is returned to the refrigerant heater. Further, during the cooling operation, the refrigerant gas discharged from the compressor 1 is passed through the fan-equipped outdoor heat exchanger 3 to be condensed and liquefied, and the refrigerant liquid is sent to the indoor heat exchanger 6 via the pressure reducing device 5 for cooling and evaporation. The refrigerant gas was sucked by the compressor 1.

Problems to be Solved by the Invention However, in the above-described configuration, during heating operation,
Since the refrigerant heater 7 heats the refrigerant by the burner, in addition to fuel such as oil or gas, an electric bill is required to operate the compressor 1, which causes a problem of high operation and maintenance costs.

Further, during the cooling operation, the refrigerant is not used in the refrigerant heater 7 and is used as a condenser by flowing the refrigerant only to the fan-equipped outdoor heat exchanger 3, so that the refrigerant is condensed and liquefied only by the fan-equipped outdoor heat exchanger 3. Therefore, the outdoor heat exchanger with fan 3 having such a large capacity cannot be miniaturized, and there is a problem in reducing the size, weight and cost of the outdoor heat exchanger with fan. Was there.

The present invention solves the above-mentioned conventional problems. In heating operation, the compressor is not operated and only the fuel cost of the burner for heating the refrigerant is used to provide low-cost heating for operation and maintenance costs. By using a heater to obtain a function as a pre-condenser, the outdoor heat exchanger with a fan can be reduced in size and weight, and an inexpensive heating / cooling machine can be configured.

Means for Solving the Problems In order to solve the above problems, a heating / cooling machine of the present invention is a compressor, a refrigerant heater with a burner, an outdoor heat exchanger with a fan having an outdoor fan, and a liquid receiver with a built-in float valve. , An outdoor unit consisting of a decompressor and an indoor unit with an indoor fan-equipped indoor heat exchanger are connected to form a heating and cooling circuit by annularly connecting refrigerant pipes, and during heating operation, a refrigerant heater with burner and a fan-equipped room In order of heat exchanger, receiver with built-in float valve, during cooling operation, compressor, burner-equipped refrigerant heater, fan-equipped outdoor heat exchanger, decompression device, fan-equipped indoor heat exchanger In this configuration, the burner combustion fan and the outdoor fan of the burner-equipped refrigerant heater are operated during cooling operation, and the burner combustion fan of the burner-equipped refrigerant heater is operated during heating operation.

Effect The present invention has the above-described configuration, and during heating operation, the evaporation pressure of the refrigerant is increased by heating and evaporating the refrigerant by the refrigerant heater with a burner. Therefore, the evaporation gas of the refrigerant is utilized to the indoor heat exchanger with a fan. By pumping, it becomes unnecessary to operate the compressor as in the past. The liquid refrigerant that has flowed into the indoor heat exchanger with a fan and has released heat flows into the receiver with a built-in float valve, the float valve operates, and the evaporating power of the refrigerant heater with a burner acts on the inside of the float valve receiver to receive it. A refrigerant circulation path is configured to return the refrigerant liquid in the liquid container to the refrigerant heater with a burner.

Also, during cooling operation, the refrigerant gas discharged from the compressor flows from the refrigerant heater with burner to the outdoor heat exchanger with fan, so the cooling operation of the burner of the refrigerant heater with burner should be stopped and the burner combustion fan should be operated. As a result, the refrigerant heater with a burner performs a heat radiation action and acts as a pre-condenser. That is, when the high-temperature discharge refrigerant gas from the compressor flows through the burner-equipped refrigerant heater, heat is dissipated, the refrigerant is cooled, and a part of the refrigerant condenses. It is only necessary to flow the partially condensed refrigerant to the fan-equipped outdoor heat exchanger to completely condense and liquefy it. Since the number can be reduced, the outdoor heat exchanger with a fan can be made smaller and lighter and cheaper.

EXAMPLES Examples of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 10 is an outdoor unit, 11 is an indoor unit, and 12 and 13 are refrigerant pipes. In the outdoor unit 10, 14 is a compressor, 15 is a refrigerant heater with a burner, 1 is an outdoor heat exchanger with a fan, 17 is a liquid receiver with a built-in float valve, and 18 is a decompression device. Further, 19 is a first check valve provided in the discharge pipe of the compressor 14, 20 is a first solenoid valve provided in the suction pipe of the compressor 14, 21 is an accumulator, 22 is a discharge pipe and a suction pipe of the compressor 5. Second solenoid valve provided on the pipe connecting 23, 23 is a third solenoid valve provided between the refrigerant heater 15 with burner and the outdoor heat exchanger 16 with fan, and 24 is the outdoor heat exchanger 16 with fan and built-in float valve A second check valve provided between the receiver 17 and the liquid receiver 17, a third check valve 25 provided between the receiver 17 with a built-in float valve and the refrigerant heater 15 with a burner, and 26 a fourth check valve. A valve, 27 is a burner combustion fan, 28 is an outdoor fan, and 29 is a control device for controlling the burner fan.
Further, in the indoor unit 12, 30 is an indoor heat exchanger with a fan, and 31 is an indoor fan.

In the above-mentioned configuration, the refrigerant circulation system path for heating is shown by a solid line, and the refrigerant circulation system path for cooling is shown by a broken line.

First, during the heating operation, when the burner of the burner-equipped refrigerant heater 15 and the burner combustion fan 27 are operated, the refrigerant is heated and evaporated, and the evaporation pressure rises. Therefore, refrigerant heater with burner
The second solenoid valve 22 in which the refrigerant gas in 15 is pumped and opened.
Through the refrigerant pipe 12 into the fan-equipped indoor heat exchanger 30. The refrigerant is condensed and liquefied by heating by the operation of the indoor fan 31, and then accumulated in the float valve built-in receiver 17 from the refrigerant pipe 13 through the fourth check valve 26. When the liquid level in the receiver with built-in float valve 17 rises, the float valve operates and the evaporation pressure of the refrigerant heater with burner 15 acts inside the receiver with built-in float valve 17, so that the refrigerant liquid is the third reverse support valve 25. From refrigerant heater with burner
It is pushed into 15 and returns. At this time, the first solenoid valve 20 and the third solenoid valve 23 are closed. As shown in the heating refrigerant circulation system above, the compressor 14 is in the operation stop state, the operating electricity cost of the compressor 14 is unnecessary, and inexpensive heating can be obtained only by the burner fuel cost of the refrigerant heater with burner 15. .

On the other hand, during the cooling operation, the high-temperature and high-pressure discharged refrigerant gas passes through the first check valve 19 by the operation of the compressor 14, passes from the refrigerant heater with burner 15 to the third electromagnetic valve 23, and the outdoor heat exchanger with fan 16
Flow into. At this time, the burner of the refrigerant heater with burner 15 is stopped and the burner combustion fan 27 is operating, so that the refrigerant heater with burner 15 also radiates heat so that the discharged refrigerant gas is partially condensed by the refrigerant. The refrigerant heater with a burner 15 will function as a pre-condenser. The outdoor heat exchanger 16 with a fan is made smaller and lighter because the refrigerant heater with a burner 15 acts as a pre-condenser. Outdoor heat exchanger with fan by operating the outdoor fan 28
The refrigerant liquid completely condensed and liquefied in 16 flows from the second check valve 24, the pressure reducing device 18, and the refrigerant pipe 13 into the fan-equipped indoor heat exchanger 30. The refrigerant is evaporated by cooling by the operation of the indoor fan 31, and then the refrigerant is sucked into the compressor 14 via the refrigerant pipe 12, the first electromagnetic valve 20, and the accumulator 21 and returns. At this time, the second solenoid valve 22 is closed.

As described above, during the cooling operation, the hot discharge gas from the compressor 14 is caused to flow to the burner-equipped refrigerant heater 15 which is operating the burner combustion fan 27, thereby acting as a pre-condenser. Even if the size and size are reduced, sufficient cooling operation can be performed.

Effects of the Invention According to the heating / cooling machine of the present invention as described above, the following effects can be obtained.

(1) Compressor, refrigerant heater with burner, outdoor heat exchanger with fan, receiver with built-in float valve, decompressor outdoor unit and indoor unit with fan heat exchanger Refrigerant circulation system line that returns the refrigerant liquid to the burner-equipped refrigerant heater via the receiver with built-in float valve after the refrigerant gas heated and evaporated by the burner-equipped refrigerant heater is pumped to the fan-equipped indoor heat exchanger and condensed and liquefied. As a result, the heating does not require the operation of the conventional compressor during heating operation, and heating can be obtained at low operation and maintenance costs without electricity costs.

(2) During cooling operation, the high-temperature refrigerant gas discharged from the compressor flows from the refrigerant heater with burner operating the fan for burner combustion to the outdoor heat exchanger with fan operating the outdoor fan, and complete condensation is achieved. The liquefied refrigerant is passed through a decompression device,
Since the indoor heat exchanger with fan and the refrigerant circulation path that returns to the compressor are configured, the refrigerant heater with burner acts as a pre-condenser, reducing the size and weight of the outdoor heat exchanger with fan and lowering the cost. Is possible.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a heating / cooling machine according to an embodiment of the present invention, and FIG. 2 is an overall configuration diagram of a conventional heating / cooling machine. 10 …… outdoor unit, 11 …… indoor unit, 14 …… compressor, 15 …… refrigerant heater with burner, 16 …… outdoor heat exchanger with fan, 17 …… receiver with built-in float valve, 18 …… Pressure reducing device, 27 ... Burner combustion fan, 29 ... Control device, 30 ...
… Indoor heat exchanger with fan.

Claims (1)

[Claims] 1. An outdoor unit comprising a compressor, a refrigerant heater with a burner, an outdoor heat exchanger with a fan having an outdoor fan, a liquid receiver with a built-in float valve, and a pressure reducing device, and an indoor heat exchanger with a fan having an indoor fan. In the heating operation, the heating / cooling circuit is formed by annularly connecting the indoor unit with the refrigerant piping to the refrigerant heater with a burner, the indoor heat exchanger with a fan, and the receiver with a built-in float valve during cooling operation. Is a compressor, a burner-equipped refrigerant heater, a fan-equipped outdoor heat exchanger, a decompression device, and a fan-equipped indoor heat exchanger, forming a refrigerant circuit in which the refrigerant flows in this order.
A heating / cooling machine that drives the burner combustion fan and the outdoor fan of the burner-equipped refrigerant heater during operation of cooling, and operates the burner combustion fan of the burner-equipped refrigerant heater during heating operation.