JPH0540763U - Heat pump air conditioner - Google Patents

Abstract

(57) [Abstract] [Purpose] When the outside air temperature is low, frost formation on the outdoor heat exchanger 3 is prevented, and reduction of the heat absorption amount of the outdoor heat exchanger 3 is prevented. [Structure] A heat storage tank 9 is interposed in a discharge pipe 12 of a compressor 1, and heat accumulated in the heat storage tank 9 is transferred by a heat pipe 10 to be radiated into the outside air flowing into an outdoor heat exchanger.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat pump type air conditioner.

[0002]

[Prior Art]

 An example of a refrigerant circuit of a conventional heat pump type air conditioner is shown in FIG. During cooling operation of the air conditioner, the four-way switching valve 2 is switched as shown by the broken line. Then, the refrigerant gas discharged from the compressor 1 passes through the four-way switching valve 2 and enters the outdoor heat exchanger 3 as shown by a dashed arrow, and radiates heat to the outside air sent by the outdoor fan 4 here. Condensate and liquefy. The liquefied refrigerant is adiabatically expanded by being throttled by a throttle mechanism 5 such as an expansion valve or a capillary tube, and then flows into an indoor heat exchanger 6, where it exchanges heat with the indoor air sent by an indoor fan 7 and exchanges it. As it cools, it evaporates and becomes a refrigerant gas. Then, it is sucked into the compressor 1 through the four-way switching valve 2 and the accumulator 8 and compressed again.

During heating operation, the four-way switching valve 2 is switched as shown by the solid line. Then, the refrigerant gas discharged from the compressor 1 flows into the indoor heat exchanger 6 through the four-way switching valve 2 as shown by the solid arrow, and heats the indoor air sent by the indoor fan 7 here. Will condense and liquefy by itself. The liquefied refrigerant is adiabatically expanded by the expansion mechanism 5 and then enters the outdoor heat exchanger 3, where it absorbs heat from the outside air sent by the outdoor fan 4 and evaporates. This refrigerant gas enters the compressor 1 through the four-way switching valve 2 and the accumulator 8 and is compressed again.

[0004]

[Problems to be solved by the device]

 In the conventional heat pump type air conditioner, when the outside air temperature decreases during heating operation, the moisture in the outside air freezes and adheres to the outdoor heat exchanger 3 as frost, resulting in a decrease in heating capacity. There was a problem.

[0005]

[Means for Solving the Problems]

 The present invention has been proposed to solve the above problems, and the gist thereof is that the refrigerant during heating operation circulates through the compressor, the indoor heat exchanger, the throttling mechanism, and the outdoor heat exchanger in this order. In a heat pump type air conditioner, a heat storage tank is installed in the discharge pipe of the compressor, and the heat stored in the heat storage tank is transferred to the outside air flowing into the outdoor heat exchanger for radiating heat. The heat pump type air conditioner is characterized by having a heat pipe.

[0006]

[Action]

 In the present invention, because of the above configuration, part of the heat of the refrigerant gas discharged from the compressor during the heating operation is stored in the heat storage tank, and this heat is transferred by the heat pipe and is transferred to the outdoor heat exchanger. Heat is dissipated into the outside air flowing into the.

[0007]

【Example】

 1 and 2 show one embodiment of the present invention. FIG. 1 is a refrigerant circuit diagram of an air conditioner, and FIG. 2 is a configuration diagram of a heat storage tank. As shown in FIG. 1, a heat storage tank 9 is interposed in a discharge pipe 12 connecting the compressor 1 and the four-way switching valve 2, and an opening / closing valve 14 is arranged on the inlet side of the heat storage tank 9. A bypass circuit 13 is connected in parallel to the heat storage tank 9 and the opening / closing valve 14, and an opening / closing valve 15 is interposed in the bypass circuit 13. One end of a large number of heat pipes 10 is embedded in the heat storage material 16 filled in the heat storage tank 9, and the other ends of these heat pipes 10 are connected to the outdoor heat exchanger 4 in the flow path 17 of the outside air to supply the outdoor heat. It is arranged on the upstream side of the exchanger 3. Then, a heat radiation fin 11 is attached to the other end.

When the temperature of the outside air is low and the humidity is high, the on-off valve 15 is closed and the on-off valve 14 is opened to perform the heating operation. Then, the refrigerant discharged from the compressor 1 is discharged by the discharge pipe 12, the on-off valve 14, the heat storage tank 9, the four-way switching valve 2, the indoor heat exchanger 6, the throttling mechanism 5, and the outdoor heat exchange, as indicated by solid line arrows. Return to the compressor 1 through the device 3, the four-way switching valve 2 and the accumulator 8. Part of the heat of the high temperature refrigerant gas discharged from the compressor 1 is stored in the heat storage material 16 when the refrigerant gas flows through the heat storage tank 9. The heat stored in the heat storage tank 9 is transferred by the heat pipe 10 and radiated to the outside air flowing into the outdoor heat exchanger 3 via the heat radiation fin 11. As a result, the temperature of the outside air flowing into the outdoor heat exchanger 3 rises, so that frost formation on the outdoor heat exchanger 3 can be prevented. Further, since the amount of heat absorbed by the refrigerant flowing through the outdoor heat exchanger 3 increases, the decrease in heating capacity can be reduced. During cooling operation or when there is no risk of frost formation, the on-off valve 14 is closed and the on-off valve 15 is opened to allow the refrigerant gas to flow through the bypass circuit 13, so that the refrigerant circulates as in the conventional case.

[0009]

[Effect of the device]

 In the present invention, the temperature of the outside air flowing into the outdoor heat exchanger can be raised by utilizing the heat of the high-temperature refrigerant gas discharged from the compressor during the heating operation. Thus, the heat absorption amount of the outdoor heat exchanger can be increased and the decrease in heat exchange efficiency due to frost formation on the outdoor heat exchanger can be prevented, so that the decrease in heating capacity can be reduced.

[Brief description of drawings]

FIG. 1 is a refrigerant circuit diagram of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a heat storage tank in the above embodiment.

FIG. 3 is a refrigerant circuit diagram of a conventional air conditioner.

[Explanation of symbols]

 1 Compressor 12 Discharge pipe 2 Four-way switching valve 3 Outdoor heat exchanger 5 Throttling mechanism 6 Indoor heat exchanger 9 Heat storage tank 10 Heat pipe 11 Radiating fins

Claims (1)

[Scope of utility model registration request] 1. A heat pump type air conditioner in which a refrigerant during heating operation circulates through a compressor, an indoor heat exchanger, a throttling mechanism and an outdoor heat exchanger in this order, wherein a heat storage tank is provided in a discharge pipe of the compressor. A heat pump type air conditioner is also provided with a heat pipe for transporting the heat stored in the heat storage tank into the outside air flowing into the outdoor heat exchanger to radiate the heat.