JP2020169782A - Refrigeration cycle equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the reliability of a refrigeration cycle apparatus using a working medium containing HFO1123. SOLUTION: It has a compressor 4 containing a compression mechanism unit, an electric motor unit 42, and lubricating oil, a condenser, an expansion means, and an evaporator, and has a double bond of 1,1,2-trifluoroethylene or the like. A refrigeration cycle device in which an operating medium containing an ethylene-based fluorinated hydrocarbon is enclosed, and is a leakage current detection unit 19 that detects a leakage current in the electric motor portion of the dense compressor, and a leakage current detection unit 19 that detects the leakage current. It is a refrigeration cycle device provided with a leakage current suppression control unit 20 that suppresses an increase in the current value. As a result, the leakage current suppression control unit 20 suppresses the leakage current of the motor unit, so that layer short-circuiting due to the melting of the insulation coating of the stator winding caused by the increase in leakage current is prevented, and the disproportionation reaction occurs. It can be prevented to improve safety and reliability. [Selection diagram] Fig. 3

Description

The present invention relates to a refrigeration cycle apparatus using an operating medium containing an ethylene-based fluorinated hydrocarbon having a double bond.

In general, a refrigeration cycle device is formed by connecting a compressor, a four-way valve, a radiator (or condenser), an expansion means such as a capillary tube or an expansion valve, an evaporator, etc., if necessary, to form a refrigeration cycle. A cooling or heating action is performed by circulating a refrigerating cycle working medium (refrigerant or heat medium) inside.

As the working medium for the refrigeration cycle in these refrigeration cycle devices, fluorocarbons (fluorocarbons are described as R ○○ or R ○○○ are specified by the US ASHRAE34 standard. Hereinafter, R ○○ or R ○ Halogenated hydrocarbons derived from methane or ethane called (shown as XX) are known.

R410A is often used as the working medium for the refrigeration cycle as described above, but the global warming potential (GWP) of the R410A refrigerant is as large as 2090, which is problematic from the viewpoint of preventing global warming.

Therefore, from the viewpoint of preventing global warming, for example, HFO1123 (1,1,2-trifluoroethylene) and HFO1132 (1,2-difluoroethylene) are attracting attention as a small operating medium for GWP (for example). , Patent Document 1 or Patent Document 2).

Japanese Patent No. 6192806 International Publication No. 2012/157765

However, a working medium containing an ethylene-based fluorocarbon having a double bond such as HFO1123 (1,1,2-trifluoroethylene) or HFO1132 (1,2-difluoroethylene) is a conventional working medium such as R410A. The stability is lower than that of the medium, and due to this, a self-decomposition reaction called a disproportionation reaction and a polymerization reaction following the self-decomposition reaction (hereinafter, referred to as a disproportionation reaction) are likely to occur. The disproportionation reaction is only an autolysis reaction in a narrow sense, and is a self-decomposition reaction and a polymerization reaction following the autolysis reaction in a broad sense.

Since the disproportionation reaction increases the pressure with a large heat release, it may reduce the reliability of the compressor and the refrigeration cycle device. Therefore, when HFO1123 or HFO1132 is used in a compressor or a refrigeration cycle device, it is necessary to suppress this disproportionation reaction.

Such a disproportionation reaction occurs from this point when high energy is applied in the compressor.

The above-mentioned high energy includes a layer short that occurs between the conductors of the stator windings that make up the stator of the electric motor in the compressor. This layer short is despite the fact that the electric motor has a lock abnormality for some reason. If the power supply is continued, the power supply to the motor becomes excessive and the insulating coating of the stator winding is melted. Therefore, the applicant has proposed some techniques for suppressing the disproportionation reaction in layer shorts caused by such oversupply of electric power.

However, as the present inventors continue to study the suppression of the disproportionation reaction, it has been found that a layer short may occur and the disproportionation reaction may be caused in the following cases as well. .. That is, the working medium such as HFO1123 (1,1,2-trifluoroethylene) or HFO1132 (1,2-difluoroethylene) is a lubricating oil provided in the compressor as compared with the conventional working medium such as R410A. Easy to melt. Therefore, the working medium accumulated in the compressor dissolves in the lubricating oil, and the amount of the mixed liquid of the working medium and the lubricating oil tends to increase. When this mixed liquid increases, a part of the stator windings becomes the working medium and the lubricating oil. Will be immersed in the mixed solution of. When a part of the stator winding is immersed in the mixed solution of the working medium and the lubricating oil, the mixed solution has a higher dielectric constant than the gasified mixed gas of the working medium and the lubricating oil, so that the leakage current flowing through the motor is large. As a result, the insulation coating of the stator winding melts. For example, the coating thickness of a small scratch on the insulating coating, that is, a very small scratch portion existing in a size such that a layer short does not occur, becomes thinner due to melting. Then, as the melting of the insulating coating progresses, a layer short occurs between the conductors of the stator winding, which causes a disproportionation reaction. Further, when a part of the stator winding is immersed in the mixed liquid and the leakage current flowing through the motor is extremely large exceeding the design value, a layer short occurs and an abnormality occurs between the layers of the stator winding. Heat generation occurs, and this heat generation causes a disproportionation reaction.

The present invention has been made based on such findings, and an object of the present invention is to suppress the occurrence of disproportionation reaction due to leakage current and to improve the reliability of the refrigeration cycle apparatus.

In order to achieve the above object, the present invention includes a compressor, a condenser, an expansion means, and an evaporator in which a compression mechanism unit, an electric motor unit, and a lubricating oil are housed, and includes 1,1,2-trifluoroethylene and the like. A refrigeration cycle device in which an operating medium containing an ethylene-based fluorinated hydrocarbon having a double bond is enclosed, and is detected by a leakage current detection unit that detects a leakage current in the electric motor portion of the compressor and a leakage current detection unit. It has a refrigeration cycle configuration provided with a leakage current suppression control unit that suppresses an increase in the leakage current value.

As a result, the leakage current suppression control unit suppresses the leakage current of the motor unit, preventing layer shorts due to melting of the insulation coating of the stator winding caused by the increase in leakage current and preventing the occurrence of disproportionation reaction. can do.

According to the above configuration, the present invention suppresses the occurrence of a disproportionation reaction caused by an increase in leakage current, and is safe and highly reliable using a working medium containing an ethylene-based fluorinated hydrocarbon having a double bond. Refrigeration cycle equipment can be provided.

Schematic configuration diagram showing an air conditioner as a refrigeration cycle device according to the first embodiment of the present invention. Sectional drawing which shows the compressor used for the air conditioner which concerns on Embodiment 1. The control block diagram of the compressor drive control unit of the air conditioner according to the first embodiment. The control block diagram of the compressor drive control part of the air conditioner which concerns on Embodiment 2 of this invention.

The first invention includes a compressor, a condenser, an expansion means, and an evaporator that house a compressor unit, an electric motor unit, and a lubricating oil, and has a double bond such as 1,1,2-trifluoroethylene. A refrigeration cycle device in which an operating medium containing an ethylene-based fluorinated hydrocarbon is enclosed, and the leakage current detection unit that detects the leakage current of the electric motor unit of the compressor and the leakage current value detected by the leakage current detection unit are It has a refrigeration cycle configuration provided with a leakage current suppression control unit that suppresses the increase.

As a result, the leakage current suppression control unit suppresses the leakage current of the motor unit, preventing layer shorts due to melting of the insulation coating of the stator winding caused by the increase in leakage current and preventing the occurrence of disproportionation reaction. can do.

In the second invention, in the first invention, the leakage current suppression control unit is configured to increase the rotation speed of the compressor.

Due to the increase in the number of revolutions of the compressor, the amount of the working medium and lubricating oil discharged from the compressor during the refrigeration cycle is increased to reduce the amount of the working medium and lubricating oil collected in the compressor, and the stator windings are in the mixed liquid. Leakage current can be reduced by preventing immersion in the oil. As a result, it is possible to suppress melting of the insulating coating of the stator winding due to the increase in leakage current, prevent layer shorts, and prevent the occurrence of disproportionation reaction due to the layer shorts.

In the third invention, in the first invention, the leakage current suppression control unit has a configuration in which the expansion means is narrowed down.

By narrowing down the expansion means, it is possible to increase the amount of the working medium and the lubricating oil discharged from the compressor during the refrigeration cycle and reduce the amount of the mixed liquid of the working medium and the lubricating oil accumulated in the compressor. As a result, the stator winding can be prevented from being immersed in the mixed liquid to reduce the leakage current, and the insulation coating melting of the stator winding due to the large leakage current can be suppressed to prevent layer shorts. It is possible to prevent the occurrence of disproportionation reaction due to the layer short.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking as an example the case where the embodiment is applied to an air conditioner. The present invention is not limited to this embodiment.

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

The air conditioner 1 of the present embodiment includes an outdoor unit 2, an indoor unit 3, and a connection pipe 9 for connecting them. The outdoor unit 2 includes a compressor 4 and an outdoor heat exchanger 5 (condenser or evaporation). The indoor unit 3 is provided with an indoor heat exchanger 7 (evaporator or condenser).

The outdoor heat exchanger 5 of the outdoor unit 2 and the indoor heat exchanger 7 of the indoor unit 3 are connected in an annular shape by a connecting pipe 9, whereby a refrigeration cycle is formed. Specifically, the compressor 4, the indoor heat exchanger 7 of the indoor unit 3, the expansion means 6, and the outdoor heat exchanger 5 of the outdoor unit 2 are connected in an annular shape by the connecting pipe 9 to form a refrigeration cycle. There is. Further, a four-way valve 8 for switching heating and cooling is provided in the connection pipe 9 connecting the compressor 4, the outdoor heat exchanger 5, and the indoor heat exchanger 7.

The outdoor unit 2 includes a blower 12, an accumulator (not shown), a temperature sensor, and the like. Further, the indoor unit 3 includes a blower fan 11, a temperature sensor (not shown), an operation unit, and the like.

The indoor heat exchanger 7 included in the indoor unit 3 is between the indoor air sucked into the indoor unit 3 by the blower fan 11 and the operating medium (hereinafter referred to as a refrigerant) flowing inside the indoor heat exchanger 7. Heat exchange is performed at. The indoor unit 3 blows air warmed by heat exchange into the room during heating, and blows air cooled by heat exchange into the room during cooling. The outdoor heat exchanger 5 included in the outdoor unit 2 exchanges heat between the outside air sucked into the outdoor unit 2 by the blower 12 and the refrigerant flowing inside the outdoor heat exchanger 5.

Refrigerant containing an ethylene-based fluorohydrocarbon having a double bond such as HFO1123 (1,1,2-trifluoroethylene) or HFO1132 (1,2-difluoroethylene) during the refrigeration cycle, in this example 1, A refrigerant containing 1,2-trifluoroethylene (HFO1123) is sealed, and the compressor 4 compresses the refrigerant and circulates it in the refrigeration cycle. Lubricating oil is sealed inside the compressor 4.

The specific configuration of the indoor unit 3 and the outdoor unit 2, or the indoor heat exchanger 7 or the outdoor heat exchanger 5, the compressor 4, the expansion means 6, the four-way valve 8, the blower fan 11, the blower 12, not shown. The specific configuration of the temperature sensor, operating unit, accumulator, other valve device, strainer, etc. is not particularly limited, and known configurations can be preferably used.

FIG. 2 shows a compressor 4 used in the air conditioner. In the present embodiment, the compressor 4 is composed of a closed rotary compressor, and an electric motor unit 42 is inside the closed container 41. The compression mechanism unit 43 is housed, the inside is filled with a high-temperature and high-pressure refrigerant and a lubricating oil, and the bottom portion is an oil storage unit 44 for storing a mixed liquid of the lubricating oil and the refrigerant.

The electric motor unit 42 is a so-called brushless motor, and includes a rotor 46 fixed to the crankshaft 45 of the compression mechanism unit 43 and a stator 47 provided around the rotor 46.

The rotor 46 is configured by mounting a permanent magnet on the rotor core and integrating it. Further, the stator 47 is configured by centrally or dispersedly winding the stator windings 50 on the stator core via an insulating paper 49.

The stator winding 50 is covered with an insulating member, and the insulating coating member is composed of, for example, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), aramid polymer, polyphenylene sulfide (PPS), or the like. ..

A lead wire 51 is pulled out from the stator winding 50, and the other end of the lead wire 51 is connected to the power supply terminal 52. The power supply terminal 52 includes three terminals, and each terminal is connected to an inverter type compressor drive control unit 15 (see FIG. 3), which will be described later.

The compression mechanism unit 43 has a cylinder 54 forming the compression chamber 53 and a rolling piston 55 arranged in the compression chamber 53 in the cylinder 54. The rolling piston 55 rotates in the compression chamber while abutting against a vane (not shown) due to the rotation of the crankshaft 45, and sucks and compresses the refrigerant from the suction pipe 56.

The compressed refrigerant is discharged from the discharge muffler 57 into the discharge medium space 58 in the closed container 41, and is discharged from the discharge pipe 59 to the outside of the compression mechanism unit 43.

The compression mechanism unit 43 has two upper and lower cylinders 54, but this may have only one cylinder 54.

Further, in the compressor 4, an accumulator 60 is provided in the suction pipe 56 in order to prevent liquid compression in the compression chamber 53. The accumulator 60 separates the refrigerant into gas and liquid, and guides only the refrigerant gas to the suction pipe 56.

FIG. 3 shows a compressor drive control unit 15, which supplies power from an external power source 16 to the inverter 18 via a converter 17 and fixes the rotor 46 so that a rotating magnetic field is generated. A current is passed through the child winding 50. The rotating magnetic field is variably controlled by the inverter 18, and is variably controlled based on the difference between the room temperature and the set temperature, and can be operated at high speed immediately after the start of operation of the compressor 4 and at low speed during stable operation. It has become. Further, the compressor drive control unit 15 controls the leakage current detection unit 19 for detecting the leakage current of the electric motor unit 42 and the inverter 18 when the current value detected by the leakage current detection unit 19 exceeds a predetermined value. It is provided with a leakage current suppression control unit 20 that increases the rotation speed of the electric motor unit 42, that is, the rotation speed of the compressor 4. The leakage current detection unit 19 is composed of a zero-phase current transformer 191 and a voltmeter 192, but the present invention is not limited to this, and a well-known one may be used.

Next, the effects of the air conditioner configured as described above will be described below.

First, the basic operation of the air conditioner will be briefly explained.

In the heating operation, the compressor 4 compresses and discharges the gas refrigerant, whereby the gas refrigerant is sent to the indoor heat exchanger 7 of the indoor unit 3 via the four-way valve 8. In the indoor heat exchanger 7, the gas refrigerant is condensed and liquefied by heat exchange with the indoor air. The liquefied liquid refrigerant is decompressed by the expansion means 6 to become a gas-liquid two-phase refrigerant, and is sent to the outdoor heat exchanger 5 of the outdoor unit 2. Since the outdoor heat exchanger 5 exchanges heat between the outside air and the gas-liquid two-phase refrigerant, the gas-liquid two-phase refrigerant evaporates to become a gas refrigerant and returns to the compressor 4. The compressor 4 compresses the gas refrigerant and discharges it to the indoor heat exchanger 7 of the indoor unit 3 again via the four-way valve 8.

In the cooling operation or the dehumidifying operation, the compressor 4 of the outdoor unit 2 compresses and discharges the gas refrigerant, whereby the gas refrigerant is sent to the outdoor heat exchanger 5 of the outdoor unit 2 via the four-way valve 8. Since the outdoor heat exchanger 5 exchanges heat between the outside air and the gas refrigerant, the gas refrigerant condenses and liquefies. The liquefied liquid refrigerant is decompressed by the expansion means 6 and sent to the indoor heat exchanger 7 of the indoor unit 3. In the indoor heat exchanger 7, the liquid refrigerant evaporates to become a gas refrigerant by heat exchange with the indoor air. This gas refrigerant returns to the compressor 4 of the outdoor unit 2 via the four-way valve 8 and the suction pipe 10. The compressor 4 compresses the gas refrigerant and discharges it to the outdoor heat exchanger 5 again via the four-way valve 8.

Next, the operation and effect of preventing the occurrence of the disproportionation reaction will be described.

When the compressor 4 is driven, the refrigerant in the compressor is compressed to the outdoor heat exchanger 5 (condenser or evaporator) and the indoor heat exchanger 7 (evaporator or condenser) during the refrigeration cycle as described above. The refrigerant is discharged and circulated, heated or cooled, and the refrigerant is sucked into the compressor 4 again and compressed.

At this time, when the amount of the refrigerant discharged from the compressor 4 is small, the amount of the mixed liquid of the refrigerant and the lubricating oil accumulated in the compressor 4 becomes large, and the lower part of the stator winding 50 of the motor portion 42 is immersed in the mixed liquid. Will be.

Then, when the stator winding 50 of the electric motor unit 42 is immersed in the mixed liquid, a leakage current flows through the stator winding 50 through the mixed liquid as described above, and the current value of the leakage current is increased. It starts to grow big.

Here, in the refrigeration cycle apparatus of the present embodiment, the leakage current is constantly detected by the leakage current detection unit 19 and output to the leakage current suppression control unit 20.

Then, when the leakage current suppression control unit 20 increases the current value detected by the leakage current detection unit 19, that is, the current value of the leakage current becomes larger than a predetermined value, the rotation speed of the compressor 4 is increased via the inverter 18.

As a result, the amount of the refrigerant and the lubricating oil discharged from the compressor 4 to the refrigeration cycle is increased, and the mixed solution of the refrigerant and the lubricating oil accumulated in the compressor 4 is reduced to the mixed solution of the stator winding 50. The immersion is released.

As a result, the leakage current flowing between the stator windings 17 via the mixed liquid is reduced, and the insulation coating melting of the stator winding 50 due to the leakage current can be suppressed.

Therefore, it is possible to suppress the melting of the insulating coating of the stator winding 50 even if it is used for a long time, prevent the occurrence of layer shorts due to the melting of the insulating coating of the stator winding 50, and prevent the occurrence of the disproportionation reaction. Can be done.
(Embodiment 2)
FIG. 4 is a block diagram showing a compressor drive control unit of the refrigeration cycle apparatus according to the second embodiment.

In the present embodiment, the leakage current suppression control unit 20 is configured to throttle the expansion valve 6 during the refrigeration cycle when the current value detected by the leakage current detection unit 19 exceeds a predetermined value.

By narrowing the expansion valve 6, the amount of refrigerant and lubricating oil discharged from the compressor 4 during the refrigeration cycle increases, and the amount of the mixture of the refrigerant and the lubricating oil accumulated in the compressor 4 decreases.

As a result, the stator winding 50 can be prevented from being immersed in the mixed liquid to reduce the leakage current, and the insulation coating melting of the stator winding 50 due to the increase in the leakage current is suppressed to cause a layer short. It is possible to prevent the occurrence of disproportionation reaction due to the layer short.

(Embodiment 3)
In the present embodiment, the refrigerant of the compressor 4 is provided with a disproportionation inhibitor that suppresses the disproportionation reaction so that the occurrence of the disproportionation reaction can be prevented more reliably.

That is, as a result of diligent studies by the present inventors, the active radicals that induce the disproportionation reaction of 1,1,2-trifluoroethylene used as the refrigerant are mainly fluorine radicals (F radicals) and trifluoro. It was clarified that it is a radical such as a methyl radical (CF ₃ radical) and a difluoromethylene radical (CF ₂ radical).

Therefore, in the present embodiment, a substance (disproportionation inhibitor) capable of efficiently capturing F radicals, CF ₃ radicals, CF ₂ radicals, and the like is added to the refrigerant.

For example, the disproportionation inhibitor is haloethane having a structure represented by the following formula (1) (except when X is only F).

C ₂ H _m X _n ... (1)
(However, X in the formula (1) is a halogen atom selected from the group consisting of F, Cl, Br, and I, m is an integer of 0 or more, n is an integer of 1 or more, and further. The sum of m and n is 6, and when n is 2 or more, X is the same or different kind of halogen atom.)
As shown in the present embodiment, by adding the above-mentioned disproportionation inhibitor to the refrigerant component containing 1,1,2-trifluoroethylene, the haloethane represented by the above formula (1) undergoes a disproportionation reaction. It satisfactorily captures radicals such as fluorine radicals, fluoromethyl radicals, and fluoromethylene radicals that cause the chain branching reaction of.

Therefore, the disproportionation reaction of 1,1,2-trifluoroethylene can be effectively suppressed, and the rapid progress of the disproportionation reaction can be alleviated. As a result, the reliability of the refrigerant and the refrigeration cycle apparatus using the refrigerant can be improved more reliably.

That is, the occurrence of the disproportionation reaction can be more reliably prevented by the multiple suppression action of the leakage current suppression control unit 20 and the disproportionation inhibitor, and the safety and reliability can be improved.

Further, examples of the disproportionation inhibitor that suppresses the disproportionation reaction include the following.

That is, it is composed of a saturated hydrocarbon having 2 to 5 carbon atoms and a haloalkane having 1 or 2 carbon atoms and excluding the case where all halogen atoms are fluorine.

According to the disproportionation inhibitor, saturated hydrocarbons and haloalkanes favor radicals such as fluorine radicals, fluoromethyl radicals, and fluoromethylene radicals generated in the disproportionation reaction of 1,1,2-trifluoroethylene. Can be captured.

Therefore, the disproportionation reaction of 1,1,2-trifluoroethylene can be effectively suppressed, and the rapid progress of the disproportionation reaction can be alleviated. Moreover, it is possible to suppress the disproportionation reaction or relax the progress with a smaller amount than when saturated hydrocarbon alone or haloalkane alone is added as a disproportionation inhibitor. As a result, the reliability of the refrigerant and the refrigeration cycle apparatus using the refrigerant can be improved.

Although the refrigeration cycle apparatus according to the present invention has been described above using the above-described embodiment, the present invention is not limited thereto.

For example, in each of the above embodiments, the rotary compressor is presented as the compressor 4, but this may be a positive displacement compressor such as a scroll compressor or a reciprocating compressor, or a centrifugal compressor or the like. It may be a compressor of. Further, the target compressor may be either a fixed capacity type or a variable capacity type.

Further, in the present embodiment, an operating medium containing HFO1123 as an operating medium has been described as an example, but the operating medium may be any medium as long as it contains an ethylene-based fluorinated hydrocarbon containing a double bond. The effect of is obtained. Another example of an ethylene-based fluorinated hydrocarbon containing this double bond is HFO1132.

Further, in the present embodiment, the case where the refrigerating cycle device is used as an air conditioner has been described as an example, but in this case, components such as a compressor, a condenser, an expansion means, and an evaporator are connected by piping. Specific application examples are not particularly limited as long as it is a refrigerating cycle device, and for example, a refrigerator (household or commercial use), a dehumidifier, a showcase, an ice maker, a heat pump type water heater, a heat pump type washer / dryer, etc. It may be a vending machine or the like.

That is, it should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive, and the scope of the present invention is indicated by the claims and is equivalent to the claims. It includes all changes in meaning and scope.

As described above, the present invention prevents a layer short due to melting of the insulating coating of the stator winding caused by an increase in leakage current, and improves the reliability of the refrigeration cycle apparatus using an operating medium containing HFO1123 and the like. be able to. Therefore, it can be widely applied to various applications such as various air conditioners for residential and commercial use, car air conditioners, water heaters, refrigerators / freezers, showcases, and dehumidifiers.

1 Air conditioner 2 Outdoor unit 3 Indoor unit 4 Compressor 5 Outdoor heat exchanger (condenser or evaporator)
6 Expansion means (expansion valve)
7 Indoor heat exchanger (evaporator or condenser)
8 Four-way valve 9 Connection piping 10 Suction piping 11 Blower fan 12 Blower 15 Compressor drive control unit 16 External power supply 17 Converter 18 Inverter 19 Leakage current detection unit 20 Leakage current suppression control unit 41 Sealed container 42 Electric motor unit 43 Compression mechanism unit 44 Oil storage Part 45 Crank shaft 46 Rotor 47 Stator 49 Stator 49 Insulation paper 50 Stator winding 51 Lead wire 52 Power supply terminal 53 Compression chamber 54 Cylinder 55 Rolling piston 56 Suction pipe 57 Discharge muffler 58 Discharge medium space 59 Discharge pipe 60 Accumulator

Claims (3)

An ethylene-based fluorinated hydrocarbon having a compressor, a condenser, an expansion means, and an evaporator that house a compressor, an electric motor, and a lubricating oil, and having a double bond such as 1,1,2-trifluoroethylene. A refrigeration cycle device in which an operating medium containing the above is enclosed, and the leakage current detection unit that detects the leakage current of the electric motor unit of the compressor and the leakage current value detected by the leakage current detection unit are suppressed from becoming large. Refrigeration cycle device equipped with a leakage current suppression control unit. The refrigeration cycle device according to claim 1, wherein the leakage current suppression control unit is configured to increase the rotation speed of the compressor. The refrigeration cycle apparatus according to claim 1, wherein the leakage current suppression control unit is configured to narrow down the expansion means.

Images