JP2001336839A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a pressure balance by a refrigerating cycle enclosing non-azeotrope refrigerant and using a temperature expansion valve as a pressure-reducing device. SOLUTION: An air conditioner successively provides communication among a compressor 1, an outdoor heat exchanger 3, a temperature expansion valves 4, 5 and an indoor heat exchanger 6, and has a refrigerating cycle enclosing non-azeotrope refrigerant for refrigerant. Heating devices 8, 9 are fitted to the temperature-sensing tubes 4a, 5a of the temperature expansion valves 4, 5, and the heating devices 8, 9 are energized at a predetermined capacity for the appropriate time at the same time with the stop of the compressor 1. Thereby, the temperature expansion valves 4, 5 are brought into their open conditions, so that the pressure balance between high pressure and low pressure is performed. Then, the compressor 1 is easily restarted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control of a temperature expansion valve of an air conditioner having a temperature expansion valve as a pressure reducing device in a refrigeration cycle using a non-azeotropic mixed refrigerant.

[0002]

2. Description of the Related Art In a refrigeration cycle using a non-azeotropic mixed refrigerant, it is well known to use an electric expansion valve or a temperature expansion valve as a pressure reducing device in order to cope with a decrease in the flow rate of the refrigerant due to the generation of sludge.

[0003] As for the usage of a temperature expansion valve of a conventional air conditioner, a closed type refrigerator described in the literature (July 30, 1981).
Some are shown on pages P228 to P235.

Hereinafter, a conventional air conditioner of a temperature expansion valve which is generally used will be described with reference to the drawings.

FIG. 7 is a refrigeration cycle diagram of a conventional air conditioner. In the figure, 13 is a compressor, 14 is a four-way valve, 1
5 is an outdoor heat exchanger, 16 is an outdoor temperature expansion valve, 17 is an indoor temperature expansion valve, 18 is an indoor heat exchanger, and 19 is an accumulator, which are sequentially connected.

The outdoor temperature expansion valve 16 has a temperature-sensitive cylinder 16a,
An external pressure equalizing tube 16b is provided, and the outdoor heat exchanger 15
Is mounted at a position to be an evaporator outlet.

The indoor temperature expansion valve 17 has a temperature-sensitive cylinder 17a,
An external pressure equalizing pipe 17b is provided, and the indoor heat exchanger 18 is provided.
Is mounted at a position to be an evaporator outlet.

The operation of the refrigeration cycle of the air conditioner configured as described above will be described below.

First, the cooling cycle will be described. The refrigerant discharged from the compressor 13 passes through the four-way valve 14, is condensed in the outdoor heat exchanger 15, passes through the outdoor temperature expansion valve 16, and
The pressure is reduced by the indoor temperature expansion valve 17, evaporated by the indoor heat exchanger 18, passed through the four-way valve 14 and the accumulator 18, and returned to the compressor 1.

In the heating cycle, the flow is the reverse of the cooling cycle, and the refrigerant discharged from the compressor 1 by switching the four-way valve 14 is condensed in the indoor heat exchanger 18, passes through the indoor temperature expansion valve 17, and passes through the outdoor use. The pressure is reduced by the temperature expansion valve 16, evaporated by the outdoor heat exchanger 16, passed through the four-way valve 14 and the accumulator 18, and returned to the compressor.

During the cooling operation, the indoor temperature expansion valve 17 is, as is well known, a low pressure of the external pressure equalizing pipe 17b connected to the outlet of the indoor heat exchanger 18 serving as an evaporator and a pressure due to the temperature of the thermosensitive cylinder 17a. The degree of opening of the valve is automatically determined by the balance.

As is well known, the outdoor temperature expansion valve 16 at the time of the heating operation is connected to the low pressure of the external pressure equalizing pipe 16b connected to the outlet of the outdoor heat exchanger 15 serving as an evaporator and the temperature-sensitive cylinder 16a.
The opening degree of the valve is automatically determined by the balance of the pressure according to the temperature.

[0013]

However, in the above-described conventional configuration, the pressure of the evaporator starts to rise at the same time as the operation of the compressor 13 is stopped, but the temperature-sensitive cylinders 16a and 17a have a heat capacity and thus are not operated during operation. , The superheat is recognized to be low, and the valves of the temperature expansion valves 16 and 17 are fully closed, so that the high-pressure and low-pressure pressures are not balanced, and the compressor 13 cannot be restarted. There were drawbacks.

Since the temperature expansion valves 16 and 17 do not detect a change in discharge pressure or a change in discharge temperature due to a load change or a change in pipe length, the temperature expansion valves 16 and 17 are not detected.
There is a disadvantage that the opening of the compressor 13 cannot be changed and the load on the compressor 13 cannot be reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems, and is an air conditioner using a non-azeotropic mixed refrigerant and capable of preventing a restart failure of a compressor in a refrigerant cycle equipped with a temperature expansion valve. Machine.

Further, the present invention provides an air conditioner in which a temperature expansion valve surely responds to a change in discharge pressure and a change in discharge temperature due to a load change or a change in pipe length, thereby reducing the load on the compressor. .

[0017]

To achieve this object, the present invention provides a compressor, an outdoor heat exchanger, a temperature expansion valve,
It has a refrigeration cycle in which an indoor heat exchanger is sequentially communicated, and a non-azeotropic mixed refrigerant is sealed in the refrigerant, a heating device is mounted on the temperature-sensitive cylinder of the temperature expansion valve, and heating control is performed simultaneously with stopping the compressor. Is what you do.

The compressor further comprises a temperature detecting means or a pressure detecting means for detecting a discharge temperature or a discharge pressure of the compressor and a control means for controlling a superheater mounted on the thermosensitive cylinder.

Thus, the load on the compressor can be reduced by accurately controlling the temperature expansion valve with the conventional non-azeotropic refrigerant mixture, and a highly reliable refrigeration cycle air conditioner can be provided.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a compressor, an outdoor heat exchanger, a temperature expansion valve, and an indoor heat exchanger are sequentially communicated, and the refrigerant is non-azeotropic. It has a refrigeration cycle in which a mixed refrigerant is sealed, and a heating device is mounted on the temperature-sensitive cylinder of the temperature expansion valve, and the heating device is energized for a predetermined time at a predetermined capacity at the same time as the compressor stops. Is opened to balance the high pressure and the low pressure, and the compressor can be easily restarted.

According to a second aspect of the present invention, there is provided a refrigeration cycle in which a compressor, an outdoor heat exchanger, a temperature expansion valve, and an indoor heat exchanger are sequentially communicated, and a non-azeotropic mixed refrigerant is sealed in the refrigerant. And a control means for mounting a heating device to the temperature-sensitive cylinder of the temperature expansion valve, and controlling the current-carrying capacity of the heating device in accordance with the temperature detected by the temperature detection means for detecting the discharge temperature of the compressor. By doing so, it is possible to suppress an increase in the discharge temperature due to a load change or a change in the pipe length, thereby reducing the load on the compressor and providing a highly reliable refrigeration cycle air conditioner.

According to a third aspect of the present invention, there is provided a refrigeration cycle in which a compressor, an outdoor heat exchanger, a temperature expansion valve, and an indoor heat exchanger are sequentially communicated, and a non-azeotropic mixed refrigerant is sealed in the refrigerant. And a control means for mounting a heating device to the temperature-sensitive cylinder of the temperature expansion valve, and controlling a current-carrying capacity of the heating device in accordance with a detection pressure of a pressure detection means for detecting a discharge pressure of the compressor. As a result, it is possible to suppress an increase in the discharge pressure due to a load change or a change in the pipe length, thereby reducing the load on the compressor and providing a highly reliable refrigeration cycle air conditioner.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioner according to the present invention will be described below with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description is omitted.

(Embodiment 1) FIG. 1 is a schematic configuration diagram of an air conditioner according to Embodiment 1 of the present invention. FIG. 2 is a timing chart showing the operation of the embodiment.

In FIG. 1, 1 is a compressor, 2 is a four-way valve,
3 is an outdoor heat exchanger, 4 is an outdoor temperature expansion valve, 5 is an indoor temperature expansion valve, 6 is an indoor heat exchanger, and 7 is an accumulator, which are sequentially connected.

The outdoor temperature expansion valve 4 is provided with a temperature-sensitive cylinder 4a and an external pressure equalizing tube 4b, and the outdoor heat exchanger 3 is mounted at a position which becomes an evaporator outlet during a heating operation. Reference numeral 8 denotes a heating device mounted on the temperature-sensitive cylinder 4a.

The indoor temperature expansion valve 5 is provided with a temperature sensing tube 5a and an external pressure equalizing tube 5b, and the indoor heat exchanger 6 is mounted at a position which becomes an evaporator outlet during a cooling operation. 9 is a heating device mounted on the temperature-sensitive cylinder 4a.

Embodiment 1 of the present invention configured as described above
The operation of the air conditioner according to the above will be described below.

First, the cooling cycle will be described. The refrigerant discharged from the compressor 1 passes through the four-way valve 2, is condensed in the outdoor heat exchanger 3, passes through the outdoor temperature expansion valve 4, is depressurized by the indoor temperature expansion valve 5, and evaporates in the indoor heat exchanger 6.

The cycle in which the evaporated refrigerant passes through the four-way valve 2 and the accumulator 7 and returns to the compressor 1 is performed.

In the heating cycle, the flow is the reverse of the cooling cycle, and the refrigerant discharged from the compressor 1 by the switching of the four-way valve 2 is condensed in the indoor heat exchanger 6, passes through the indoor temperature expansion valve 5, and passes through the outdoor use. The pressure is reduced by the temperature expansion valve 4 and evaporated by the outdoor heat exchanger 6, and the opening degree of the valve is automatically controlled.
Further, the cycle returns to the compressor 1 through the four-way valve 2 and the accumulator 7.

At the time of cooling operation, the indoor temperature expansion valve 5 sets the degree of heating based on the evaporating pressure of the external pressure equalizing pipe 5b connected to the evaporator outlet of the indoor heat exchanger 6 and the detected temperature of the thermosensitive cylinder 5a. The opening of the valve is automatically controlled.

During the heating operation, the outdoor temperature expansion valve 4 sets the degree of heating based on the evaporating pressure of the external pressure equalizing pipe 4b connected to the evaporator outlet of the outdoor heat exchanger 3 and the detected temperature of the temperature sensing tube 4a. , The opening of the valve is automatically controlled.

In FIG. 2, at the time of cooling at the same time when the operation of the compressor 1 is stopped, a heating device 9 mounted on the temperature-sensitive cylinder 5a of the indoor temperature expansion valve 5 is supplied with electricity for a predetermined amount of time at a predetermined time. The heating device 8 mounted on the temperature-sensitive cylinder 4a of the outdoor temperature expansion valve 4 is energized at a predetermined capacity for an appropriate time t.

At the same time when the compressor 1 is stopped, the heating device 8 is turned on during heating or the heating device 9 is turned on during cooling, so that the temperature-sensitive cylinder 4a (5a) is heated, and the internal pressure of the temperature-sensitive tube 4a (5a) is increased. Rises, and the indoor temperature expansion valve 4 or the outdoor temperature expansion valve 5 is fully opened.

Therefore, at the same time as the compressor 1 is stopped, a high pressure and a low pressure are balanced through the indoor temperature expansion valve 4 or the outdoor temperature expansion valve 5, so that the operation of the compressor 1 at the time of restart is easy. Will be performed.

As described above, the air conditioner of this embodiment is
At the same time as the operation of the compressor 1 is stopped, the heating device 9 mounted on the temperature-sensitive cylinder 5a of the indoor temperature expansion valve 5 is appropriately energized with a predetermined capacity for a time t at the time of cooling, and the outdoor temperature expansion valve 4 at the time of heating. The heating device 8 mounted on the temperature-sensitive cylinder 4a is configured to be energized at a predetermined capacity for an appropriate period of time t. At the same time as the compressor 1 stops, the temperature-sensitive cylinder 4a (5a) is heated, and the temperature-sensitive cylinder 4a ( 5
The internal pressure of a) rises, and the indoor temperature expansion valve 5 or the outdoor temperature expansion valve 4 is opened. During cooling, the indoor temperature expansion valve 5 is used. Thus, the high pressure and the low pressure are balanced, and the operation at the time of restarting the compressor 1 is easily performed.

Embodiment 2 FIG. 3 is a schematic cycle diagram of an air conditioner according to Embodiment 2 of the present invention. FIG. 4 is a timing chart showing the operation of the embodiment.

In FIG. 3, 1 is a compressor, 2 is a four-way valve, 3 is an outdoor heat exchanger, 4 is an outdoor temperature expansion valve, 5 is an indoor temperature expansion valve, 6 is an indoor heat exchanger, and 7 is an accumulator. And are sequentially connected.

The outdoor temperature expansion valve 4 is provided with a temperature-sensitive cylinder 4a and an external pressure equalizing tube 4b, and the outdoor heat exchanger 3 is mounted at a position to be an evaporator outlet. Reference numeral 8 denotes a heating device mounted on the temperature-sensitive cylinder 4a.

The indoor temperature expansion valve 5 is provided with a temperature sensing tube 5a and an external pressure equalizing tube 5b, and the indoor heat exchanger 6 is mounted at a position to be an evaporator outlet. 9 is a heating device mounted on the temperature-sensitive cylinder 4a.

Reference numeral 10 denotes temperature detecting means for detecting the discharge temperature of the compressor 1, and reference numeral 11 denotes control means for controlling the heating capacity of the heating devices 8, 9.

Embodiment 2 of the present invention configured as described above
The operation of the air conditioner according to the above will be described below.

Referring to the cooling cycle in FIG. 3, the refrigerant discharged from the compressor 1 passes through the four-way valve 2 and passes through the outdoor heat exchanger 3.
, Passes through the outdoor temperature expansion valve 4, passes through the indoor temperature expansion valve 5, is decompressed and evaporates in the indoor heat exchanger 6, and the evaporated refrigerant is returned to the compressor 1 through the four-way valve 2 and the accumulator 7. Cycle.

During the cooling operation, the indoor temperature expansion valve 5 sets the degree of heating based on the evaporation pressure of the external pressure equalizing pipe 5b connected to the evaporator outlet of the indoor heat exchanger 6 and the temperature of the temperature sensing cylinder 5a. Is automatically controlled.

During the heating operation, the outdoor temperature expansion valve 4 sets the degree of heating according to the evaporation pressure of the external pressure equalizing tube 4b connected to the evaporator outlet of the outdoor heat exchanger 3 and the temperature of the thermosensitive tube 4a. Is automatically controlled.

In FIG. 4, the discharge temperature of the compressor 1 rises due to a load change or a change in the pipe length, and becomes higher than an appropriate discharge temperature.
When the discharge temperature reaches a predetermined value t1, the temperature is detected by the temperature detecting means 10 and is output to the heating device 8 (9) with a capacity preset in the control means 11.

The output from the control means 11 is the discharge temperature t1,
The output of a plurality of steps is set by t2 or the like, and is output stepwise.

Therefore, the temperature-sensitive cylinders 4a and 5a of the outdoor temperature expansion valve 4 or the indoor temperature expansion valve 5 are appropriately heated by the heating devices 8 and 9, so that the internal pressure of the temperature-sensitive cylinders 4a and 5a increases. The opening degree of the valve is appropriately opened from the original automatic setting, the refrigerant circulation amount increases, and the discharge temperature decreases.

As described above, the air conditioner of this embodiment is
The discharge temperature of the compressor 1 is detected by the heating device 9 attached to the temperature-sensitive cylinder 4a of the outdoor temperature expansion valve 4 or the heating device 8 attached to the temperature-sensitive cylinder 5a of the indoor temperature expansion valve 5. The temperature is detected by the temperature detecting means 10 and the control means 11 is controlled to output a predetermined capacity when the temperature reaches a predetermined value t1.

During operation of the compressor 1, if the discharge temperature becomes higher than an appropriate discharge temperature due to a load change or a change in the pipe length, when the discharge temperature reaches a predetermined value t 1, it is detected by the temperature detecting means 10, and the control means 11. The preset volume is output to the heating device 8 (9), and the temperature-sensitive cylinder 4a (5a) of the outdoor temperature expansion valve 4 or the indoor temperature expansion valve 5 is connected to the heating device 8 (9).
By being heated by (9), the temperature-sensitive cylinder 4a (5
The internal pressure of a) rises, the opening of the valve is opened as appropriate from the original automatic setting, the refrigerant circulation amount increases, the discharge temperature decreases, the load on the compressor 1 is reduced, and the highly reliable air A harmonizer will be provided.

(Embodiment 3) FIG. 5 is a schematic diagram of an air conditioner according to Embodiment 3 of the present invention. FIG. 6 is a timing chart showing the operation of the embodiment.

In FIG. 5, 1 is a compressor, 2 is a four-way valve, 3 is an outdoor heat exchanger, 4 is an outdoor temperature expansion valve, 5 is an indoor temperature expansion valve, 6 is an indoor heat exchanger, and 7 is an accumulator. And are sequentially connected.

The outdoor temperature expansion valve 4 is provided with a temperature-sensitive cylinder 4a and an external pressure equalizing pipe 4b, which are disposed at the evaporator outlet of the outdoor heat exchanger 3, and a heating device 8 is mounted on the temperature-sensitive cylinder 4a. Have been.

The indoor temperature expansion valve 5 is provided with a temperature sensing tube 5a and an external pressure equalizing tube 5b, which are arranged at the outlet of the evaporator of the indoor heat exchanger 6, and the heating device 9 is mounted on the temperature sensing tube 5a. Have been.

Reference numeral 12 denotes a pressure detecting means for detecting the discharge pressure of the compressor 1, and reference numeral 11 denotes a control means for controlling the heating capacity of the heating devices 8, 9.

Embodiment 3 of the present invention configured as described above
The operation of the air conditioner according to the above will be described below.

Referring to the cooling cycle in FIG. 5, the refrigerant discharged from the compressor 1 passes through the four-way valve 2 and passes through the outdoor heat exchanger 3.
, Passes through the outdoor temperature expansion valve 4, passes through the indoor temperature expansion valve 5, is decompressed and evaporates in the indoor heat exchanger 6, and the evaporated refrigerant is returned to the compressor 1 through the four-way valve 2 and the accumulator 7. Cycle.

During the cooling operation, the indoor temperature expansion valve 5 sets the degree of heating according to the evaporation pressure of the external pressure equalizing pipe 5b connected to the outlet of the evaporator of the indoor heat exchanger 6 and the temperature of the temperature sensing tube 5a. Is automatically controlled.

During the heating operation, the outdoor temperature expansion valve 4 sets the degree of heating based on the evaporation pressure of the external pressure equalizing pipe 4b connected to the evaporator outlet of the outdoor heat exchanger 3 and the temperature of the thermosensitive cylinder 4a. Is automatically controlled.

In FIG. 6, when the compressor 1 is operated, the discharge pressure rises due to a load change or a change in the pipe length, becomes higher than an appropriate discharge pressure, and when the discharge pressure reaches a predetermined value P1, the pressure detecting means 1
2, a signal is input to the control means 11, and the control means 11 stores the preset volume in the heating device 8
Output to (9), the temperature-sensitive cylinder 4a (5a) is heated.

The output from the control means 11 is the discharge pressure P1,
The output of a plurality of steps is set by P2 and is output stepwise.

Accordingly, when the temperature-sensitive cylinders 4a, 5a of the outdoor temperature expansion valve 4 or the indoor temperature expansion valve 5 are heated by the heating devices 8, 9, the internal pressure of the temperature-sensitive cylinders 4a, 5a increases. The opening of the valve is opened as appropriate from the original automatic setting, so that the refrigerant circulation amount increases and the discharge pressure decreases.

As described above, the air conditioner of this embodiment is
Pressure detection for detecting the discharge pressure of the compressor 1 by using the heating device 9 mounted on the temperature-sensitive cylinder 4a of the outdoor temperature expansion valve 4 or the heating device 8 mounted on the temperature-sensitive cylinder 5a of the indoor temperature expansion valve 5. The control means 11 detects that the predetermined value P1 has been reached by the means 12, and outputs a predetermined capacity to the heating device 8 or 9 by the control means 11.

During operation of the compressor 1, when the discharge pressure becomes higher than an appropriate discharge pressure due to a load fluctuation or a change in the pipe length, and when the discharge pressure reaches a predetermined value P1, the pressure detection means 12 detects the discharge pressure.
A predetermined capacity is output from the control means 11 to the heating devices 8 and 9, and the indoor or outdoor temperature expansion valve 4 is provided.
When the temperature-sensitive cylinders 4a and 5a are heated by the heating devices 8 and 9, the internal pressure of the temperature-sensitive cylinders 4a and 5a increases, and the opening of the valve is appropriately opened from the original automatic setting. The circulation amount increases, the discharge pressure decreases, the load on the compressor 1 is reduced, and a highly reliable air conditioner is provided.

[0066]

As described above, the first aspect of the present invention provides a compressor, an outdoor heat exchanger, an outdoor temperature expansion valve,
The indoor temperature expansion valve and the indoor heat exchanger are sequentially communicated,
Having a refrigeration cycle in which a non-azeotropic mixed refrigerant is sealed in the refrigerant,
A heating device is attached to the temperature-sensitive cylinder of the outdoor temperature expansion valve or the indoor temperature expansion valve, and the heating device is energized for a predetermined time at a predetermined capacity at the same time as the stop of the compressor. When the compressor is opened, the high pressure and the low pressure are balanced, and the compressor can be easily restarted.

The invention according to a second aspect of the present invention relates to a compressor, an outdoor heat exchanger, an outdoor temperature expansion valve, an indoor temperature expansion valve, and an indoor heat exchanger which are sequentially communicated with each other to form a refrigerant. A refrigeration cycle filled with a non-azeotropic mixed refrigerant, a heating device mounted on a temperature-sensitive cylinder of the outdoor temperature expansion valve or the indoor temperature expansion valve, and temperature detection means for detecting a discharge temperature of the compressor. Equipped with control means for controlling the current-carrying capacity of the heating device according to the detected temperature, it is possible to control the rise in discharge temperature due to load fluctuations, pipe length changes, etc., thereby reducing the load on the compressor and improving reliability. A high refrigeration cycle can be supplied.

According to a third aspect of the present invention, there is provided a compressor, an outdoor heat exchanger, an outdoor temperature expansion valve, an indoor temperature expansion valve,
It has a refrigeration cycle in which an indoor heat exchanger is sequentially communicated, and a non-azeotropic mixed refrigerant is sealed in the refrigerant. A heating device is mounted on the temperature-sensitive cylinder of the temperature expansion valve, and the discharge pressure of the compressor is detected. Control means for controlling the current-carrying capacity of the heating device in accordance with the pressure detected by the pressure detection means to control the rise in discharge temperature due to load fluctuations, pipe length changes, etc. This makes it possible to supply a refrigeration cycle with reduced reliability.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a timing chart of Embodiment 1 of the air conditioner according to the present invention.

FIG. 3 is a schematic configuration diagram of Embodiment 2 of the air conditioner according to the present invention.

FIG. 4 is a timing chart of Embodiment 2 of the air conditioner according to the present invention.

FIG. 5 is a schematic configuration diagram of Embodiment 3 of the air conditioner according to the present invention.

FIG. 6 is a timing chart of Embodiment 3 of the air conditioner according to the present invention.

FIG. 7 is a schematic cycle diagram of a conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 3 Outdoor heat exchanger 4 Outdoor temperature expansion valve 4a Temperature sensing cylinder of outdoor temperature expansion valve 4b External pressure equalizing pipe of outdoor temperature expansion valve 5 Indoor temperature expansion valve 5a Temperature sensing cylinder of indoor temperature expansion valve 5b External pressure equalizing pipe of indoor temperature expansion valve 8, 9 Heating device 10 Temperature detecting means 11 Control means 12 Pressure detecting means

Claims (3)

[Claims] A refrigeration cycle in which a compressor, an outdoor heat exchanger, a temperature expansion valve, and an indoor heat exchanger are sequentially communicated with each other, and a non-azeotropic mixed refrigerant is filled in the refrigerant; An air conditioner wherein a heating device is mounted on a temperature-sensitive cylinder of a valve, and the heating device is energized for a predetermined time at a predetermined capacity at the same time when the compressor is stopped. 2. A refrigeration cycle in which a compressor, an outdoor heat exchanger, a temperature expansion valve, and an indoor heat exchanger are sequentially communicated, and a refrigeration cycle in which a non-azeotropic mixed refrigerant is filled in the refrigerant. A heating device mounted on the temperature-sensitive cylinder of the valve, and air having a control means for controlling a current-carrying capacity of the heating device in accordance with a temperature detected by a temperature detection means for detecting a discharge temperature of the compressor. Harmony machine. 3. A refrigeration cycle in which a compressor, an outdoor heat exchanger, a temperature expansion valve, and an indoor heat exchanger are sequentially communicated, and a refrigeration cycle in which a non-azeotropic mixed refrigerant is filled in the refrigerant, A heating device mounted on the temperature-sensitive cylinder of the valve, and a control unit for controlling a current-carrying capacity of the heating device in accordance with a detection pressure of a pressure detection unit for detecting a discharge pressure of the compressor. Harmony machine.