JP6960570B2 - Refrigeration cycle equipment - Google Patents

Description

The present invention relates to a refrigeration cycle apparatus using a working medium containing HFO1123.

Generally, in a refrigerating cycle device such as an air conditioner, a compressor, a four-way valve, a radiator (or a condenser), a decompressor such as a capillary tube or an expansion valve, an evaporator, etc. are connected by piping to refrigerate. A cooling or heating action is performed by forming a cycle and circulating an operating medium (refrigerant) inside the cycle.

As the operating medium in these refrigeration cycle devices, fluorocarbons (fluorocarbons are described as R ○○ or R ○○○ are specified by the US ASHRAE34 standard. Hereinafter, they are referred to as R ○○ or R ○○○. A halogenated hydrocarbon derived from methane or ethane called (shown) is known.

R410A is often used as the operating medium for the refrigeration cycle device 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) have been proposed as a small operating medium for GWP (for example). , Patent Document 1 or Patent Document 2).

International Publication No. 2012/157964 International Publication No. 2012/157765

However, HFO1123 (1,1,2-trifluoroethylene) and HFO1132 (1,2-difluoroethylene) are less stable than conventional working media such as R410A, and are disproportionated when radicals are generated. It may change to another compound due to the conversion reaction. 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.

In particular, when such a disproportionation reaction occurs, the compressor is damaged and the working medium becomes soot. The working medium that has become soot is blown into the atmosphere through the gap between the top plate and front plate of the outdoor unit body that houses the compressor. Since this soot increases the anxiety of the user and the like, the reliability of the user is greatly reduced. In particular, the working medium that has become soot unexpectedly blows out from various gaps in the outdoor unit. Therefore, the user does not understand why the soot is blown out and feels uneasy.

The present invention has been made in view of these points, and an object of the present invention is to improve the reliability of an air conditioner using an operating medium containing HFO1123 when an disproportionation reaction occurs.

In order to achieve the above object, the present invention has a compressor, an outdoor heat exchanger, an expansion means, and an indoor heat exchanger, and uses a working medium containing 1,1,2-trifluoroethylene as a refrigerant in a refrigeration cycle. The compressor, the outdoor heat exchanger, and the outdoor unit including the expansion means are provided, and a space for accommodating the compressor and a space outside the outdoor unit are provided on the surface of the outdoor unit. It is characterized by providing a communication section for communication.

As a result, a disproportionation reaction occurs in the compressor, the compressor is damaged, and the operating medium becomes soot, which is discharged and diffused into the compressor storage space. It is discharged to the outside. Therefore, soot does not blow out vigorously from the gap between the outdoor unit and the gap between the top plate and the front plate of the outdoor unit. Since the discomfort that the user receives due to the vigorous blowing of soot can be reduced, the anxiety of the user can be reduced. In addition, since the location of soot discharge can be specified in the communication part, the anxiety felt by the user can be further reduced by notifying that there is a possibility of soot discharge, and the user can use the soot discharge. You can prevent harm.

According to the above configuration, the present invention reduces the momentum of soot blowing when a disproportionation reaction occurs. Therefore, it is possible to reduce the anxiety that the user receives due to the blowing out of soot and prevent the user from being harmed. Thereby, the reliability of the air conditioner using the working medium including HFO1123 can be improved.

Schematic configuration of an air conditioner as a refrigeration cycle device according to the first embodiment of the present invention. Sectional drawing which shows the compressor of the air conditioner which concerns on Embodiment 1. Front view showing the outdoor unit of the air conditioner according to the first embodiment. An exploded perspective view showing an outdoor unit of the air conditioner according to the first embodiment. The plan view which shows the outdoor unit of the air conditioner which concerns on Embodiment 1. Schematic cross-sectional view illustrating the operation of the air conditioner according to the second embodiment in the outdoor unit portion. Schematic plan view for explaining the operation of the air conditioner according to the second embodiment in the outdoor unit portion. Explanatory drawing of pressure relief mechanism provided in compressor of air conditioner which concerns on Embodiment 2.

The disproportionation reaction of HFO1123 and HFO1132 occurs as a starting point when high energy is applied in an atmosphere of excessively high temperature and high pressure.

For example, the discharge pressure (high pressure side of the refrigeration cycle) rises excessively due to a state under normal operating conditions, that is, a stop of the blower fan on the condenser side, a blockage of the refrigeration cycle circuit, or the like.

Under the above conditions, the lock function of the compressor becomes abnormal. If the power supply to the compressor is continued under this abnormality, the power is excessively supplied to the motor of the compressor, and the motor generates heat abnormally. As a result, the insulation of the stator windings constituting the stator of the motor is melted and broken, and the electric flow paths called layer shorts occur between the conductors, which becomes a high energy source. This high energy source induces the disproportionation reaction of HFO1123 and HFO1132.

Then, when the disproportionation reaction occurs, the compressor is damaged and the working medium becomes soot. The working medium that has become soot is blown into the atmosphere through the gap between the outdoor unit that houses the compressor and the gap between the top plate and front plate of the outdoor unit. This increases the anxiety of the user and greatly reduces the reliability.

The present invention has been made in view of these points.

The first invention is a refrigeration cycle using a working medium having a compressor, an outdoor heat exchanger, an expansion means, and an indoor heat exchanger and containing 1,1,2-trifluoroethylene as a refrigerant. A communication unit having an outdoor unit including the compressor, the outdoor unit, and the expansion means, and communicating the space for accommodating the compressor and the space outside the outdoor unit on the surface of the outdoor unit. It is configured to provide.

As a result, even if a disproportionation reaction occurs in the compressor and the compressor is damaged and the operating medium becomes soot, when the soot is discharged and diffused into the compressor storage space, the soot is discharged from the communication part provided in the outdoor unit to the outside. It is discharged to the outside of the machine. Therefore, it is possible to reduce the anxiety felt by the user due to the vigorous blowing of soot from the gap between the outdoor unit and the gap between the top plate and the front plate of the outdoor unit. In addition, since the location of soot discharge can be specified in the communication part, it is possible to reduce the anxiety that the user receives by notifying that there is a possibility of soot discharge, and the soot discharge causes harm to the user. Can be prevented from receiving.

A second invention is configured in the first invention, wherein the outdoor unit includes a partition plate that separates the compressor from the outdoor heat exchanger.

As a result, the soot discharged from the compressor is blown out into the space containing the heat exchanger. Therefore, it is possible to prevent the outdoor heat exchanger from being contaminated with soot, and the outdoor heat exchanger can be reused.

According to the third invention, in the first or second invention, the communication portion has an area larger than the total area of the gaps formed by the members constituting the compressor storage space facing each other.

As a result, the soot discharged from the compressor into the compressor storage space is blown out from the communication portion to the outside of the outdoor unit. Therefore, the gap formed by the members constituting the compressor storage space facing each other, that is, the outdoor unit of the outdoor unit. It is possible to prevent soot from blowing out vigorously from the gap between the main body and the top plate or front plate. As a result, the anxiety felt by the user can be eliminated.

A fourth invention is a configuration in which the communication portion is provided above the lowermost portion of the compressor in the first to third inventions.

As a result, it is possible to prevent the problem that the communication portion is blocked by the drain water or the like collected on the bottom surface of the outdoor unit. Then, it is possible to ensure the discharge of soot from the communication portion.

A fifth invention is a configuration in which the communication portion is provided on the back surface of the outdoor unit in the first to fourth inventions.

As a result, the soot can be discharged toward the wall surface of the house behind the outdoor unit. Therefore, it is possible to surely reduce the possibility of soot being sprayed around the outdoor unit, particularly to the user in front or side.

A sixth aspect of the present invention is the first to fifth aspect of the present invention, wherein the compressor is provided with a pressure relief portion for releasing an excessive pressure at which a disproportionation reaction occurs to the outside.

As a result, extreme damage to the compressor itself can be prevented, safety can be improved, and the rapid progress of the disproportionation reaction can be suppressed to generate soot, that is, from the communication part to the outside of the outdoor unit. The amount of soot discharged can be suppressed, and the anxiety of the user can be further reduced.

The seventh invention is the configuration in which the disproportionation inhibitor is added to the working medium in the first to sixth inventions.

As a result, the disproportionation reaction can be suppressed to prevent damage to the compressor itself and the safety can be further improved, and the rapid progress of the disproportionation reaction can be prevented, so that the amount of soot generated, that is, , The amount of soot discharged from the communication part to the outside of the outdoor unit can be reduced, and the user's anxiety can be further reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of a refrigeration cycle device 10 according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of a compressor used in the refrigeration cycle device 10.

The refrigeration cycle device 10 of the present embodiment is used as an air conditioner, and as shown in FIG. 1, includes an indoor unit 11, an outdoor unit 12, and a pipe 13 connecting them, and the indoor unit 11 evaporates. An indoor heat exchanger 14 used as a vessel or a condenser is provided, and an outdoor unit 12 is provided with an outdoor heat exchanger 15, a compressor 16, an expansion means 17, and a controller 18 used as a condenser or an evaporator. There is.

Then, the controller 18 is connected to the external power source 20, receives electric power from the external power source 20, and drives the refrigeration cycle device 10.

The indoor heat exchanger 14 of the indoor unit 11 and the outdoor heat exchanger 15 of the outdoor unit 12 are connected in an annular shape by a pipe 13, whereby a refrigeration cycle is formed. Specifically, the indoor heat exchanger 14 of the indoor unit 11, the compressor 16, the outdoor heat exchanger 15 of the outdoor unit 12, and the expansion means 17 are connected in an annular shape by the pipe 13 in this order. Further, a four-way valve 19 for switching air conditioning is provided in the pipe 13 connecting the indoor heat exchanger 14, the compressor 16, and the outdoor heat exchanger 15. The indoor unit 11 is provided with a blower fan, a temperature sensor, an operation unit and the like (not shown), and the outdoor unit 12 is provided with a blower, an accumulator and the like (not shown). Further, the pipe 13 is provided with various valve devices (including a four-way valve 19), a strainer, and the like (not shown).

The indoor heat exchanger 14 included in the indoor unit 11 exchanges heat between the indoor air sucked into the indoor unit 11 by the blower fan and the operating medium flowing inside the indoor heat exchanger 14. The indoor unit 11 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 15 included in the outdoor unit 12 exchanges heat between the outside air sucked into the outdoor unit 12 by the blower and the operating medium flowing inside the outdoor heat exchanger 15.

FIG. 2 shows a compressor 16 used in the refrigeration cycle circuit. In the present embodiment, the compressor 16 is composed of a closed rotary compressor, and the electric motor unit 162 is inside the closed container 161. The compression mechanism unit 163 is housed, the inside is filled with a high-temperature and high-pressure working medium and lubricating oil, and the bottom is an oil storage unit 164 for storing lubricating oil.

The compressor 16 is not limited to the rotary compressor.

The motor unit 162 is a brushless motor, and includes a rotor 166 connected to the crankshaft 165 of the compression mechanism unit 163 and a stator 167 provided around the rotor 166.

The rotor 166 is configured by mounting a permanent magnet on the rotor core and integrating it. Further, the stator 167 is configured by centrally winding a stator winding 170 around a stator core via an insulating paper 169. A lead wire 171 is discharged from the stator winding 170, and the other end of the lead wire 171 is connected to the power supply terminal 172. The power supply terminal 172 includes three terminals, and each terminal is connected to an inverter type controller 18 (see FIG. 1). The stator winding 170 may be a distributed winding.

The controller 18 receives a power supply from an external power supply 20 (see FIG. 1) and causes a switching element to pass a current through the stator winding 170 so that a rotating magnetic field is generated in the rotor 166. The rotating magnetic field is variable by the inverter, and can be operated at high speed immediately after the start of operation of the compressor 16 and at low speed during stable operation.

The compression mechanism unit 163 has a cylinder 174 forming the compression chamber 173 and a rolling piston 175 arranged in the compression chamber 173 in the cylinder 174. The rolling piston 175 rotates in the compression chamber while abutting against a vane (not shown) due to the rotation of the crankshaft 165, and sucks and compresses the working medium from the suction pipe 179.

The compressed working medium is discharged from the discharge muffler 176 into the discharge working medium space 177 in the closed container 161 and discharged from the discharge pipe 178 to the outside of the compression mechanism unit 163. Further, in order to prevent liquid compression in the compression chamber 173, an accumulator 180 is provided in the suction pipe 179. FIG. 3 is a front view of the outdoor unit 12 in the air conditioner having the above configuration, FIG. 4 is an exploded perspective view of the outdoor unit 12, and FIG. 5 is a plan view of the outdoor unit 12 as viewed from the top plate 125 side.

As shown in FIG. 3, the outdoor unit 12 has an outdoor unit main body 121. The top plate 125 covers the upper surface of the outdoor unit main body 121, and the front plate 126 covers the front side thereof. On the side surface of the pipe 13 having the connecting portion, the side wall cover 127 covers the side wall 128. The side wall cover 127 is provided with a communication portion 129, which connects the inside and the outside of the outdoor unit main body 121. When viewed from the front, a partition plate 122 is provided at a position indicated by a broken line to partition a space for accommodating the compressor 16 and a space for not accommodating the compressor 16.

As shown in FIG. 4, the partition plate 122 is provided so as to separate the blower 21 and the compressor 16. The communication portion 129 is provided on both the side wall 128 and the side wall cover 127, and connects the space in which the compressor 16 is housed with the outside. The outdoor heat exchanger 15 and the blower 21 are installed next to the compressor storage space 123, which is the space where the compressor is stored, and the front surface thereof is mounted on the front surface of the outdoor unit main body 121 together with the front surface of the compressor storage space 123. It is covered with a front plate 126. Further, a side wall cover 127 is detachably attached to the side surface of the outdoor unit main body 121 forming the compressor storage space 123.

FIG. 5 is a view of the outdoor unit 12 as viewed from the top plate 125 side. The soot ejected from the compressor 16 is discharged from the communication portion 129 to the outside air. The direction in which soot is released is indicated by the dashed arrow.

Needless to say, the above description relates to an example shown as a representative of the present embodiment, and is not limited to this.

The air conditioner configured as described above has a working medium (refrigerant) sealed in the refrigeration cycle circuit. The working medium of this embodiment contains at least 1,1,2-trifluoroethylene (HFO1123) as a refrigerant component. 1,1,2-trifluoroethylene has the structure of the following formula (1), and two hydrogen atoms (H) bonded to the carbon atom (C) at the 1-position of ethylene are replaced with fluorine (F). At the same time, one of the two hydrogen atoms bonded to the carbon atom at the 2-position is replaced with fluorine.

1,1,2-trifluoroethylene contains a carbon-carbon double bond. Ozone in the atmosphere generates hydroxyl radicals (OH radicals) by a photochemical reaction, and these hydroxyl radicals easily break down double bonds. Therefore, 1,1,2-trifluoroethylene has little effect on ozone depletion and global temperature.

However, 1,1,2-trifluoroethylene causes a rapid disproportionation reaction when high energy such as layer short is applied under high temperature and high pressure conditions as described above due to this good degradability. In this disproportionation reaction, a self-decomposition reaction in which molecules of 1,1,2-trifluoroethylene are decomposed occurs, and following this self-decomposition reaction, carbon generated by the decomposition is polymerized to form soot. Reactions and the like occur. Therefore, the blower fan on the condenser side is stopped, the refrigeration cycle circuit is blocked, etc., and the compressor 16 is in a high temperature and high pressure state. This also causes dielectric breakdown and layer shorts. Then, an active radical is generated, and this active radical reacts with 1,1,2-trifluoroethylene to generate the above-mentioned disproportionation reaction.

Since the disproportionation reaction is accompanied by heat generation, active radicals are generated by this heat generation, and further, the disproportionation reaction is induced by the active radicals. In this way, the generation of active radicals and the generation of disproportionation reaction are linked, so that the disproportionation reaction proceeds rapidly, and the pressure in the compressor 16 rises sharply in about 0.2 sec. Eventually, the compressor 16 is damaged.

When the compressor 16 is damaged, the working medium that has caused the disproportionation reaction in the compressor 16 becomes soot and is discharged and diffused into the outdoor unit 12 that houses the compressor 16. As described above, the operating medium that has become soot is shaped to be blown out from the gap of the compressor storage space 123 of the outdoor unit 12, for example, between the outdoor unit main body 121 and the top plate 125 or the front plate 126. At this time, the user vigorously blows out soot from the gap of the outdoor unit 12, and as a result, the user feels great anxiety. In addition, soot is randomly blown out from the gap of the outdoor unit 12, which further increases the discomfort of the user. Further, since soot adheres to the portion of the outdoor unit main body 121, the top plate 125, and the front plate 126 from which soot is blown out and its vicinity, the outdoor unit main body 121, the top plate 125, and the front plate 126 are used during maintenance such as compressor replacement. The housing itself will have to be replaced.

However, in the air conditioner of the present embodiment, the compressor storage space 123 is provided with a portion that communicates with the outside of the outdoor unit 12, that is, the atmosphere. Specifically, as shown in FIG. 4, a communication portion 129 for discharging soot as a communication portion is provided on the side wall 128 and the side wall cover 127 of the outdoor unit main body 121 constituting the compressor storage space 123.

As a result, when a disproportionation reaction occurs in the compressor 16 and the compressor 16 is damaged and the soot of the operating medium is discharged and diffused into the compressor storage space 123, the soot is discharged and diffused in the side portion of the outdoor unit main body 121, that is, It is discharged to the outside of the outdoor unit 12 from the communication portion 129 provided on the side wall 128 and the side wall cover 127. Therefore, it is possible to prevent the outdoor unit 12 from blowing out from the gap between the outdoor unit main body 121 and the top plate 125 or the front plate 126.

Therefore, it is possible to reduce the anxiety of the user due to the vigorous blowing of soot from the gap between the outdoor unit 12 and the gap between the top plate 125 and the front plate 126 of the outdoor unit main body 121.

In addition, by writing a note to the effect of soot release in the vicinity of the communication section 129, for example, a note saying "soot may be released in an abnormal situation", soot can be discharged from the communication section 129. Even if there is, it is possible to alleviate the anxiety of the user and prevent the user from being harmed by the discharge of soot.

Furthermore, it is possible to prevent soot stains near the gaps between the outdoor unit main body 121, the top plate 125, and the front plate 126, which occur when blowing out from the gap between the outdoor unit main body 121 and the top plate 125 or the front plate 126. It is not necessary to replace the housing itself including the outdoor unit main body 121, the top plate 125, and the front plate 126 at the time of maintenance such as compressor replacement, and the cost burden of parts replacement can be reduced.

The communication portion 129 is formed so that the hole area is larger than the total area of the gaps formed between the top plate 125 and the front plate 126 covering the compressor storage space 123 and the outdoor unit main body 121. Is desirable. That is, the area of the communication portion 129 is set larger than the total area of the gaps formed by the members (outdoor unit main body 121, top plate 125, front plate 126, etc.) that divide the peripheral space of the compressor 16 facing each other. It is preferable to keep it.

As a result, the soot diffused in the compressor storage space 123 can be smoothly discharged to the outside of the outdoor unit 12 from the communication portion 129 having a large opening area, and the outdoor unit main body 121, the top plate 125, and the front plate 126 It is possible to surely prevent blowing out from the gap between the spaces, improve the effect of eliminating anxiety, and surely prevent soot stains on the housing.

Further, although the communication portion 129 is provided on the side portion of the outdoor unit 12 in the present embodiment, it may be provided on the back surface, and a net is provided to prevent the invasion of pests or a large number of small holes. It is preferable to set it as.

If the communication unit 129 is provided on the back surface of the outdoor unit main body 121, soot discharge can be specified behind the outdoor unit, and even if there are users or the like around the front surface and the side surface of the outdoor unit 12. It is possible to reliably prevent the risk of soot being sprayed on the user or the like. That is, by providing the communication unit 129 on the wall surface side of the house behind the outdoor unit where the user or the like cannot be present, soot harm to the user can be reliably prevented.

Further, it is preferable that the communication portion 129 is provided above the lowermost portion of the compressor 16. As a result, there is a concern that the compressor 16 is provided below the bottom, for example, on the bottom surface of the outdoor unit 12, that is, the communication portion 129 is blocked due to submersion in drain water or the like collected on the bottom surface of the outdoor unit. It can be prevented in advance, and the discharge of soot from the communication portion 129 can be ensured.

(Embodiment 2)
FIG. 6 is a schematic configuration diagram showing the outdoor unit 12 of the air conditioner according to the second embodiment, FIG. 7 is a schematic plan view of the outdoor unit 12, and FIG. 8 is an explanatory diagram of a pressure release mechanism provided in the compressor 16.

In the second embodiment, the description of the portion described in the first embodiment may be omitted.

As shown in FIGS. 6 to 8, in the present embodiment, the compressor 16 is provided with a pressure relief mechanism 181 that releases the pressure that suddenly rises due to the disproportionation reaction of the working medium. The pressure relief mechanism 181 is configured by, for example, weakening the strength of the welded portion 182 of the power feeding terminal 172 as shown in FIG.

As a result, when the pressure rises in the compressor 16 and an disproportionate reaction occurs, the welded portion of the power supply terminal 172 that serves as the pressure relief mechanism 181 is disengaged by the pressure, and the pressure is released from the unwelded portion of the power supply terminal 172. As a result, the pressure of the working medium in the compressor 16 drops instantly. Therefore, it is possible to prevent extreme damage to the closed container itself of the compressor 16 and enhance safety. Further, it is possible to suppress the rapid progress of the disproportionation reaction and reduce the amount of soot generated, that is, the amount of soot discharged from the communication portion 129, further reducing the anxiety of the user. Can be done.

FIG. 6 is a schematic view of the outdoor unit 12 as viewed from the front except for the front plate 126. The compressor storage space 123 in which the compressor 16 is housed is partitioned from the space in which the blower 21 is housed by a partition plate 122. A control storage chamber 124 is provided above the compressor 16, and the controller 18 is housed in the control storage chamber 124. A communication portion 129 is provided on the side wall 128 and the side wall cover 127 at a height between the control storage chamber 124 and the compressor 16. It suffices that the side wall 128 and the side wall cover 127 can communicate with the compressor storage space 123 and the outside air. For example, when it is provided only on the side wall 128, the communication portion 129 may be provided on the side wall 128.

In FIG. 6, a guide member 183 is provided inside the compressor storage space 123 to connect the pressure relief mechanism 181 above the compressor 16 to the communication portion 129. Further, on the outside of the outdoor unit main body 121, a soot discharge guide extending horizontally from above the communication portion 129 and extending downward, that is, substantially vertically downward is provided. The guide member 183 guides the soot blowing direction in the compressor storage space 123. That is, the soot blown out is surely guided to the communication portion 129. The soot discharge guide 184 guides the soot blown out from the communication portion 129 so as to be blown downward from the outdoor unit 12. As a result, the soot discharged from the pressure relief mechanism 181 of the compressor 16 can be guided to the communication portion 129 and smoothly discharged to the outside of the outdoor unit 12. Then, it is possible to reduce the vigorous blowing of soot from the gap between the outdoor unit 12 and the gap between the top plate 125 and the front plate 126 of the outdoor unit main body 121.

Further, by providing the soot discharge guide 184 on the outside of the communication portion 129, it is possible to prevent the soot from blowing out toward the user, and it is possible to surely prevent the harm caused by the soot.

The pressure relief mechanism 181 is not limited to the above configuration, and may have a configuration in which the strength of the welded portion of the discharge pipe 178 is weakened. Further, it may be configured by providing a pressure adjusting valve separately.

(Embodiment 3)
Next, the third embodiment will be described. In the third embodiment, the description of the portion described in the first embodiment or the second embodiment may be omitted.

In the third embodiment, 1,1,2-trifluoroethylene (HFO1123) is contained in a working medium containing 1,1,2-trifluoroethylene (HFO1123) enclosed in a refrigeration cycle circuit. An disproportionation inhibitor that suppresses the disproportionation reaction of ethylene is added.

For example, the disproportionation inhibitor is represented by the following formula (2).

(However, X in the formula (2) 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 a halogen atom of the same or different type), which is a haloethane having the structure shown in (except when X is F only).

As described above, by adding the above-mentioned disproportionation inhibitor to the refrigerant component containing 1,1,2-trifluoroethylene, the haloethane represented by the above formula (2) is chain-branched in the disproportionation reaction. It satisfactorily captures radicals such as fluorine radicals, fluoromethyl radicals, and fluoromethylene radicals that cause reactions.

Therefore, the disproportionation reaction of 1,1,2-trifluoroethylene can be effectively suppressed, and the rapid progress of the disproportionation reaction can be alleviated.

Therefore, the compressor itself can be prevented from being damaged to further improve safety, and the rapid progress of the disproportionation reaction can be suppressed. Therefore, the amount of soot generated, that is, the soot is discharged from the communication portion 129. The amount of soot discharged can be significantly suppressed, and the anxiety of the user can be further reduced.

Further, the disproportionation inhibitor that suppresses this disproportionation reaction may be further as follows.

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 working medium and the refrigerating cycle device using the working medium can be improved.

(Embodiment 4)
Subsequently, another embodiment will be described. In the fourth embodiment, the description of the parts described in the first to third embodiments may be omitted.

In this embodiment, in addition to the configuration of each of the above-described embodiments, for example, a detection means for detecting the discharge of soot by the working medium, for example, a temperature sensor because the soot is hot, is provided in the compressor storage space 123. When the temperature in the compressor storage space 123 exceeds a predetermined temperature, this is displayed on the indoor unit side.

By doing so, when the air conditioner stops abnormally, it is possible to notify the user that the cause of the abnormal stop is due to the disproportionation reaction. Therefore, not only the feeling of anxiety due to the disproportionation reaction can be reduced, but also the cause can be clarified to give the user a sense of security.

The present invention has been described above by taking the case where the refrigeration cycle device is used as an air conditioner as an example. In this case, components such as a compressor, a condenser, an expansion means, and an evaporator are connected by piping, and the present invention is described. As long as it is a refrigeration cycle device having an outdoor unit, specific application examples are not particularly limited, and for example, a heat pump type water heater or the like may be used.

Further, in the present embodiment, the rotary compressor has been described as an example of the compressor, but this is described by using another compression type, for example, a positive displacement compressor such as a scroll type or a reciprocal type, or a centrifugal type compressor. Any compressor such as a machine may be used.

As described above, the present invention uses an operating medium containing HFO1123, which can alleviate the anxiety received by the user due to the blowing of soot when the disproportionation reaction occurs and can prevent the user from being harmed. It is possible to improve the reliability of the refrigeration cycle device that has been used. Therefore, it can be widely applied to residential and commercial air conditioners, heat pump type water heaters, and the like.

10 Refrigeration cycle device 11 Indoor unit 12 Outdoor unit 13 Piping 14 Indoor heat exchanger 15 Outdoor heat exchanger 16 Compressor 17 Expansion means 18 Controller 19 Four-way valve 20 External power supply 21 Blower 121 Outdoor unit body 122 Partition plate 123 Compressor storage Space 124 Control storage room 125 Top plate 126 Front plate 127 Side wall cover 128 Side wall 129 Communication part 161 Sealed container 162 Motor part 163 Compressor mechanism part 164 Oil storage part 165 Crankshaft 166 Rotor 167 Stator 169 Insulation paper 170 Stator winding 171 Lead wire 172 Power supply terminal 173 Compressor chamber 174 Crank 175 Rolling piston 176 Discharge muffler 177 Discharge operating medium space 178 Discharge pipe 179 Suction pipe 180 Accumulator 181 Pressure relief mechanism 182 Welding part 183 Guide member 184 Soot discharge guide

Claims (5)

A refrigeration cycle comprising a compressor, an outdoor heat exchanger, an expansion means, and an indoor heat exchanger, and using an operating medium containing 1,1,2-trifluoroethylene as a refrigerant. The outdoor unit has an outdoor unit including the compressor and the expansion means, the outdoor unit is provided with a partition plate for separating the compressor and the outdoor heat exchanger, and the surface of the outdoor unit is covered with the outdoor unit. A communication portion for communicating the space for accommodating the compressor and the space outside the outdoor unit is provided, and a guide member for connecting from above the compressor to the communication portion is provided in the space for accommodating the compressor, and the communication is provided. The refrigerating cycle apparatus is characterized in that the unit has an area larger than the total area of the gaps formed on the surrounding wall surface forming the space for accommodating the compressor. The refrigeration cycle device according to claim 1, wherein the communication portion is provided above the lowermost part of the compressor. The refrigeration cycle device according to claim 1 or 2, wherein the communication portion is provided on the back surface of the outdoor unit. The refrigeration cycle apparatus according to any one of claims 1 to 3, wherein the compressor is provided with a pressure relief portion for releasing an excessive pressure at which a disproportionation reaction occurs to the outside. The refrigeration cycle apparatus according to any one of claims 1 to 4, wherein a disproportionation inhibitor is added to the working medium.

Images