JP6565277B2 - Refrigeration equipment - Google Patents

Description

  The present invention relates to a refrigeration apparatus.

  Some refrigerants used in refrigeration equipment have properties such as toxicity, flammability, and ozone depletion. Therefore, the refrigeration apparatus needs to be able to quickly detect that the refrigerant has leaked from the refrigeration apparatus for some reason.

  A building multi-air conditioning system that is an example of a refrigeration apparatus has a heat source unit for promoting heat exchange between a refrigerant and outside air as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2013-76478). .

  Inside the components of such a refrigeration apparatus, a mechanism for generating vibration such as a compressor, a refrigerant pipe for circulating a high-pressure refrigerant, and the like are installed. If these parts that continue to be exposed to harsh conditions deteriorate over time, refrigerant leakage may occur.

  The subject of this invention is detecting the refrigerant | coolant leakage inside a freezing apparatus rapidly.

  A refrigeration apparatus according to a first aspect of the present invention includes a compressor, a surrounding member, a refrigerant leakage sensor, a heat exchanger, a valve, a refrigerant pipe group, and a casing. The compressor has a pressure vessel, a suction part, and a discharge part. The suction part allows the refrigerant to flow into the inside of the pressure vessel. The discharge part causes the refrigerant to flow out from the inside of the pressure vessel. The surrounding member surrounds the compressor in order to suppress the diffusion of the refrigerant. The refrigerant leakage sensor is provided inside the surrounding member. The refrigerant pipe group has a plurality of pipes. Each of the plurality of pipes communicates with at least a part of the compressor, the heat exchanger, and the valve. The casing accommodates a compressor, a surrounding member, a refrigerant leak sensor, a heat exchanger, a valve, and a refrigerant pipe group.

  According to this configuration, the compressor and the refrigerant leakage sensor are surrounded by the surrounding member. Therefore, when refrigerant leakage due to the compressor occurs, the leaked refrigerant gathers in a narrow space surrounded by the surrounding member, and is thus easily detected quickly by the refrigerant leakage sensor.

  The refrigeration apparatus according to the second aspect of the present invention is the refrigeration apparatus according to the first aspect, further comprising a terminal. The terminal is located above the refrigerant leakage sensor. The terminal is for energizing the compressor.

  According to this configuration, the terminal is disposed higher than the refrigerant leakage sensor. Therefore, when a refrigerant having a higher specific gravity than air is used, the leaked refrigerant accumulates in a low place, so that the refrigerant is detected by the refrigerant leak sensor before the refrigerant reaches the terminal that can be an ignition source.

  In the refrigeration apparatus according to the third aspect of the present invention, in the refrigeration apparatus according to the first aspect or the second aspect, both the suction joint portion and the discharge joint portion are provided inside the surrounding member. Here, the suction joint portion connects the suction portion and the refrigerant pipe group. The discharge joint portion connects the discharge portion and the refrigerant pipe group.

  According to this configuration, the suction joint portion and the discharge joint portion are surrounded by the surrounding member. Therefore, it is possible to quickly detect refrigerant leakage from the suction joint portion or the discharge joint portion.

  A refrigeration apparatus according to a fourth aspect of the present invention is the refrigeration apparatus according to any one of the first to third aspects, wherein at least some of the plurality of pipes included in the refrigerant pipe group have a curved portion. . The curved portion is provided inside the surrounding member.

  According to this configuration, the bending portion is surrounded by the surrounding member. Therefore, refrigerant leakage from the curved portion can be detected quickly.

  A refrigeration apparatus according to a fifth aspect of the present invention is the refrigeration apparatus according to any one of the first to fourth aspects, further comprising a suction injection pipe communicating with the suction portion. A suction injection joint for connecting the suction injection pipe and the suction portion is provided inside the surrounding member.

  According to this configuration, the suction injection joint is surrounded by the surrounding member. Therefore, it is possible to quickly detect refrigerant leakage from a location related to the suction injection pipe.

  The refrigeration apparatus according to a sixth aspect of the present invention is the refrigeration apparatus according to any one of the first to fifth aspects, further comprising an intermediate injection pipe communicating with the inside of the pressure vessel. An intermediate injection joint for connecting the intermediate injection pipe and the pressure vessel is provided inside the surrounding member.

  According to this configuration, the intermediate injection joint is surrounded by the surrounding member. Therefore, it is possible to quickly detect refrigerant leakage from a location related to the intermediate injection pipe.

  A refrigeration apparatus according to a seventh aspect of the present invention is the refrigeration apparatus according to any one of the first to sixth aspects, wherein the surrounding member is made of metal.

  According to this configuration, the surrounding member is made of metal. Therefore, the surrounding member has a certain strength.

  The refrigeration apparatus according to the eighth aspect of the present invention is the refrigeration apparatus according to any one of the first to seventh aspects, wherein the heat exchanger and the valve are provided outside the surrounding member.

  According to this configuration, the heat exchanger and the valve are both disposed outside the surrounding member. Therefore, the volume of the space inside the surrounding member can be reduced in order to detect refrigerant leakage more quickly.

  The refrigeration apparatus according to the ninth aspect of the present invention is the refrigeration apparatus according to any one of the first to eighth aspects, further comprising a fan. The fan causes air to pass through the heat exchanger. An upper opening and a lower opening are formed in the surrounding member. The upper opening is located above the refrigerant leakage sensor. The lower opening is located below the refrigerant leakage sensor. The fan generates an air flow inside the surrounding member. The surrounding member internal airflow is directed from one of the upper opening and the lower opening to the other. The refrigerant leakage sensor is arranged in the air flow inside the surrounding member.

  According to this configuration, the refrigerant leakage sensor is exposed to the air flow inside the surrounding member. Therefore, when a refrigerant leak occurs inside the refrigeration apparatus, the leaked refrigerant reaches the refrigerant leak sensor by the air flow inside the surrounding member, so that the refrigerant leak can be detected more quickly.

  A refrigeration apparatus according to a tenth aspect of the present invention is the refrigeration apparatus according to any one of the first to ninth aspects, wherein the heat exchanger is a heat source side heat exchanger. The heat source side heat exchanger functions as a condenser when providing cold energy to the user, or functions as an evaporator when providing warm temperature to the user.

  According to this configuration, the refrigeration apparatus is a heat source unit having a heat source side heat exchanger. Therefore, it is possible to quickly detect refrigerant leakage that has occurred in the heat source unit.

  A refrigeration apparatus according to an eleventh aspect of the present invention is the refrigeration apparatus according to any one of the first to ninth aspects, wherein the heat exchanger is a use side heat exchanger. The use side heat exchanger functions as an evaporator when providing cold heat to the user, or functions as a condenser when providing hot heat to the user.

  According to this configuration, the refrigeration apparatus is a utilization unit having a utilization side heat exchanger. Therefore, it is possible to quickly detect refrigerant leakage that has occurred in the utilization unit.

  The refrigeration apparatus according to the sixth aspect, the eighth aspect, and the ninth aspect of the present invention can quickly detect the leakage of the refrigerant.

  In the refrigeration apparatus according to the seventh aspect of the present invention, the surrounding member has strength.

  The refrigeration apparatus according to the tenth aspect of the present invention can quickly detect refrigerant leakage in the heat source unit.

  The refrigeration apparatus according to the eleventh aspect of the present invention can quickly detect refrigerant leakage in the utilization unit.

1 is a schematic diagram showing a refrigeration system in which a refrigeration apparatus according to a first embodiment of the present invention is used. It is a perspective view which shows the external appearance of the freezing apparatus which concerns on 1st Embodiment of this invention. It is a perspective view which shows the internal structure of the freezing apparatus which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows the internal structure of the freezing apparatus which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows a part of internal structure of the freezing apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing which shows a compressor. It is a schematic diagram which shows the freezing apparatus which concerns on 2nd Embodiment of this invention.

<First Embodiment>
(1) Overall Configuration FIG. 1 shows a refrigeration system 100 equipped with a refrigeration apparatus 30A according to the first embodiment of the present invention. The refrigeration system 100 includes a refrigeration apparatus 30A that functions as a heat source unit, a plurality of utilization units 10, and a refrigerant communication pipe group 20 that connects these units.

  The refrigerant communication pipe group 20 includes a gas refrigerant pipe 21 and a liquid refrigerant pipe 22.

  Each usage unit 10 includes a gas port 11 connected to the gas refrigerant pipe 21, a liquid port 12 connected to the liquid refrigerant pipe 22, a usage-side heat exchanger 13 that provides hot or cold heat to the user, and A use side expansion valve 14 is provided.

(2) Detailed configuration The refrigeration apparatus 30A according to the first embodiment of the present invention functions as a heat source unit as described above.

(2-1) Refrigerant Circuit Element As shown in FIG. 1, the refrigeration apparatus 30A includes a gas port 31, a liquid port 32, a heat source side heat exchanger 33A, a heat source side expansion valve 34, a fan 35, a four-way switching valve 36, and an accumulator. 37, a compressor 38, and an oil separator 39.

(2-1-1) Gas port 31
The gas port 31 is a part that exchanges gas refrigerant with the gas refrigerant pipe 21.

(2-1-2) Liquid port 32
The liquid port 32 is a part that exchanges liquid refrigerant with the liquid refrigerant pipe 22.

(2-1-3) Heat source side heat exchanger 33A
The heat source side heat exchanger 33A functions as a condenser when providing cold heat to the user, and functions as an evaporator when providing hot heat to the user.

(2-1-4) Heat source side expansion valve 34
The heat source side expansion valve 34 is a valve whose opening degree can be adjusted, and is used for decompressing the refrigerant as necessary.

(2-1-5) Fan 35
The fan 35 is for acting on air to pass through the heat source side heat exchanger 33A in order to promote heat exchange of the heat source side heat exchanger 33A.

(2-1-6) Four-way selector valve 36
The four-way switching valve 36 changes the connection of the refrigerant circuit. The four-way switching valve 36 makes a connection drawn with a solid line when providing cold heat to the user, and makes a connection drawn with a broken line when providing heat to the user.

(2-1-7) Accumulator 37
The accumulator 37 performs gas-liquid separation of the circulating refrigerant and sends only the gas refrigerant to the compressor 38.

(2-1-8) Compressor 38
The compressor 38 is for performing a compression operation necessary for the refrigeration cycle.

  As shown in FIG. 6, the compressor 38 has a pressure vessel 38a. The pressure vessel 38a accommodates a motor 38e, a fluid compression mechanism 38g, and a shaft 38f for transmitting the power of the motor 38e to the fluid compression mechanism 38g. In the pressure vessel 38a, a suction portion 38b for sucking refrigerant, a discharge portion 38c for discharging refrigerant, a connection portion 38k for connecting an intermediate injection pipe 64 described later, and these are respectively fixed to the main body of the compression vessel 38a. Container joint portions 38h, 38i, and 38j are provided. The container joints 38h, 38i, 38j are any connection means including welding, brazing, screw engagement mechanisms, and bolted flanges. Further, the pressure vessel 38a is provided with a terminal 38d for supplying electric power to the motor 38e.

(2-1-9) Oil separator 39
Returning to FIG. 1, the oil separator 39 is for removing the lubricating oil mixed in the high-pressure gas refrigerant discharged from the compressor 38.

(2-2) Casing 40
FIG. 2 shows the appearance of the refrigeration apparatus 30A. The refrigeration apparatus 30 </ b> A includes a casing 40. The casing 40 includes a top plate 41, a bottom plate 42, a side plate 43, and a column 44. A top plate ventilation hole 41a is formed in the top plate 41, and a top plate net 41b is fitted therein. The heat source side heat exchanger 33A is exposed between the columns 44 on the side surface.

  FIG. 3 shows a state in which the top plate 41 and the side plate 43 are removed. As understood from this figure, the casing 40 has an intermediate plate 45. A fan 35 is installed on the middle plate 45.

(2-3) Safety Element As shown in FIG. 5, the refrigeration apparatus 30 </ b> A includes a surrounding member 50 and a refrigerant leakage sensor 70.

(2-3-1) Enclosing member 50
As shown in FIG. 4, the surrounding member 50 surrounds the compressor 38 to prevent the refrigerant leaked from the compressor 38 or its vicinity from diffusing. As shown in FIG. 5, a lower opening 51 and an upper opening 52 are formed in the surrounding member 50. Due to the action of the fan 35 (FIG. 2), an air flow F inside the enclosure member from the lower opening 51 toward the upper opening 52 is generated inside the enclosure member 50.

  The container joint portions 38h, 38i, and 38j are disposed inside the surrounding member 50.

(2-3-2) Refrigerant leakage sensor 70
As shown in FIG. 5, the refrigerant leakage sensor 70 is installed in a place where the surrounding member internal airflow F passes inside the surrounding member 50. The height at which the terminal 38d of the compressor 38 is installed is higher than the height at which the refrigerant leakage sensor 70 is installed.

(2-4) Refrigerant Piping Group As shown in FIG. 1, the refrigeration apparatus 30 </ b> A includes a refrigerant piping group 60. The refrigerant pipe group 60 includes a plurality of pipes communicating with at least a part of the compressor 38, the heat source side heat exchanger 33A, and the heat source side expansion valve 34.

  FIG. 6 shows a suction pipe 61, a discharge pipe 62, a suction injection pipe 63, and an intermediate injection pipe 64 included in the refrigerant pipe group 60. The suction pipe 61 is connected to the suction part 38b by a suction joint part 61a. The discharge pipe 62 is connected to the discharge part 38c by the discharge joint part 62a. The suction injection pipe 63 is connected to the suction pipe 61 by a suction injection joint 63a. The intermediate injection pipe 64 is connected to the connection part 38k by the intermediate injection joint part 64a.

  The suction joint portion 61a, the discharge joint portion 62a, the suction injection joint portion 63a, and the intermediate injection joint portion 64a are each of any connection means including welding, brazing, a screw engagement mechanism, and a bolted flange. is there.

As shown in FIG. 5, the suction joint portion 61 a, the discharge joint portion 62 a, the suction injection joint portion 63 a, and the intermediate injection joint portion 64 a are disposed inside the surrounding member 50. Further, the curved portion B of the refrigerant pipe group 60 is disposed inside the surrounding member 50. The pipe having the curved portion B is, for example, the suction pipe 61 and the discharge pipe 62. The suction injection pipe 63 or the intermediate injection pipe 64 may have a curved portion B.
(3) Operation (3-1) Providing Cold Heat When the refrigeration system 100 shown in FIG. 1 provides cold heat to the user, the four-way switching valve 36 of the refrigeration apparatus 30A is connected as indicated by a solid line. The high-pressure gas refrigerant discharged from the compressor 38 is condensed by releasing heat in the heat source side heat exchanger 33A functioning as a condenser, and becomes high-pressure liquid refrigerant. The high-pressure liquid refrigerant is sent to the utilization unit 10 via the liquid refrigerant pipe 22 and is decompressed by the utilization-side expansion valve 14 to become a low-pressure gas-liquid two-phase refrigerant. The low-pressure gas-liquid two-phase refrigerant absorbs heat by the use-side heat exchanger 13 functioning as an evaporator to provide cold energy to the user, and evaporates to become a low-pressure gas refrigerant. The low-pressure gas refrigerant is sucked into the compressor 38 via the gas refrigerant pipe 21 and compressed.

(3-2) Heat Supply When the refrigeration system 100 provides heat to the user, the four-way switching valve 36 of the refrigeration apparatus 30A is connected as indicated by a broken line. The high-pressure gas refrigerant discharged from the compressor 38 is sent to the usage unit 10 via the gas refrigerant pipe 21. Thereafter, the high-pressure gas refrigerant releases heat at the use-side heat exchanger 13 functioning as a condenser to provide warm heat to the user, and condenses into a high-pressure liquid refrigerant. The high-pressure liquid refrigerant is sent to the heat source unit 30 via the liquid refrigerant pipe 22 and is decompressed by the heat source side expansion valve 34 to become a low-pressure gas-liquid two-phase refrigerant. The low-pressure gas-liquid two-phase refrigerant absorbs heat by the heat source side heat exchanger 33A functioning as an evaporator and evaporates to become a low-pressure gas refrigerant. The low-pressure gas refrigerant is sucked into the compressor 38 and compressed.

(4) Features (4-1)
The compressor 38 and the refrigerant leakage sensor 70 are surrounded by the surrounding member 50. Therefore, when a refrigerant leak due to the compressor 38 occurs, the leaked refrigerant gathers in a narrow space surrounded by the surrounding member 50, and thus is easily detected quickly by the refrigerant leak sensor 70.

  Among the refrigerants used in the refrigeration apparatus, there are flammable refrigerants having the property of burning, and the degree of flammability varies from slightly flammable to strongly flammable. Examples of the flammable refrigerant include R32 (CH2F2: difluoromethane), HFO-1234yf (CF3CF = CH2; tetrafluoropropane), HFO-1234ze (CF3CF = CHF), R290 (C3H8: propane), ammonia (NH3), Alternatively, a mixture thereof can be used. When a flammable refrigerant leaks, it must be detected particularly quickly. The refrigeration apparatus 30A according to the present invention can also reduce the danger associated with handling of such combustible refrigerants.

(4-2)
The terminal 38d is disposed higher than the refrigerant leakage sensor 70. Therefore, when a refrigerant having a specific gravity higher than that of air is used, the leaked refrigerant accumulates in a low place, so that the refrigerant is detected by the refrigerant leak sensor 70 before the refrigerant reaches the terminal 38d that can be an ignition source.

(4-3)
The suction joint portion 61a and the discharge joint portion 62a are surrounded by the surrounding member 50. Therefore, it is possible to quickly detect refrigerant leakage from the suction joint portion 61a or the discharge joint portion 62a.

  When the refrigeration apparatus 30A is transported to the installation location, or when the compressor 38 is operated when the refrigeration apparatus 30A is used, joint portions such as the suction joint portion 61a and the discharge joint portion 62a are exposed to vibration. The refrigeration apparatus 30 </ b> A according to the present invention can reduce the risk associated with breakage of the joint portion caused by such vibration.

(4-4)
The curved portion B is surrounded by the surrounding member 50. Therefore, the refrigerant leakage from the curved part B can be detected quickly.

  The curved portion B is also exposed to the aforementioned vibration. The refrigeration apparatus 30A according to the present invention can reduce the risk associated with the deterioration of the bending portion B caused by such vibration.

(4-5)
The suction injection joint 63a is surrounded by the surrounding member 50. Therefore, it is possible to quickly detect refrigerant leakage from a location related to the suction injection pipe 63.

(4-6)
The intermediate injection joint 64 a is surrounded by the surrounding member 50. Therefore, it is possible to quickly detect refrigerant leakage from a location related to the intermediate injection pipe 64.

(4-7)
The surrounding member 50 is made of metal. Therefore, the surrounding member 50 has a certain strength.

(4-8)
The heat source side heat exchanger 33 </ b> A and the heat source side expansion valve 34 are both disposed outside the surrounding member 50. Therefore, the volume of the space inside the surrounding member 50 can be reduced in order to detect refrigerant leakage more quickly.

(4-9)
The refrigerant leak sensor 70 is exposed to the surrounding member internal airflow F. Therefore, when a refrigerant leak occurs inside the refrigeration apparatus 30A, the leaked refrigerant reaches the refrigerant leak sensor 70 by the surrounding member internal airflow F, so that the refrigerant leak can be detected more quickly.

(4-10)
The refrigeration apparatus 30A is a heat source unit having a heat source side heat exchanger 33A. Therefore, it is possible to quickly detect refrigerant leakage that has occurred in the heat source unit.

Second Embodiment
(1) Overall Configuration FIG. 7 shows a refrigeration apparatus 30B that functions as a utilization unit according to the second embodiment of the present invention. The refrigeration apparatus 30B is an indoor unit of an air conditioner and communicates with the outdoor unit via a refrigerant communication pipe group (not shown).

(2) Detailed Configuration (2-1) Refrigerant Circuit Element The refrigeration apparatus 30B includes a use side heat exchanger 33B, a fan 35, and a compressor 38.

(2-1-1) User side heat exchanger 33B
The use-side heat exchanger 33B functions as an evaporator when providing cold energy to the user, and functions as a condenser when providing warm temperature to the user.

(2-1-2) Fan 35
The fan 35 is for moving air to pass through the use side heat exchanger 33B in order to promote heat exchange of the use side heat exchanger 33B.

(2-1-3) Compressor 38
The compressor 38 is for performing a compression operation necessary for the refrigeration cycle. The configuration of the compressor 38 is the same as that of the first embodiment.

(2-1-4) Others Other elements constituting the refrigerant circuit are the same as those in the first embodiment.

(2-2) Casing 40
The refrigeration apparatus 30 </ b> B includes a casing 40. The casing 40 is provided with an intake port 81 for inhaling air in a room in which the refrigeration apparatus 30B is installed, and a duct 82 for discharging cold or warm air.

(2-3) Safety element (2-3-1) Enclosing member 50
By surrounding the compressor 38, the surrounding member 50 suppresses the diffusion of the refrigerant leaked from the compressor 38 or its vicinity. A lower opening 51 and an upper opening 52 are formed in the surrounding member 50. Due to the action of the fan 35, an air flow F inside the enclosure member from the lower opening 51 toward the upper opening 52 is generated inside the enclosure member 50.

(2-3-2) Refrigerant leakage sensor 70
The refrigerant leakage sensor 70 is installed in the surrounding member 50 at a place where the surrounding member internal airflow F passes. The height at which the terminal 38d of the compressor 38 is installed is higher than the height at which the refrigerant leakage sensor 70 is installed.

(2-4) Refrigerant piping group The refrigeration apparatus 30B has the same refrigerant piping group as in the first embodiment.

(3) Features The refrigeration apparatus 30B is a utilization unit having a utilization side heat exchanger 33B. Therefore, it is possible to quickly detect refrigerant leakage that has occurred in the utilization unit.

  The present invention is applicable to all refrigeration apparatuses such as an air conditioner and a heat pump water heater.

B Curved portion F Enclosure member internal air flow 10 Utilization unit 20 Refrigerant communication piping group 30A Refrigeration equipment (heat source unit)
30B Refrigeration equipment (use unit)
33A Heat source side heat exchanger 33B User side heat exchanger 34 Heat source side expansion valve 35 Fan 38 Compressor 38a Pressure vessel 38b Suction part 38c Discharge part 38d Terminal 40 Casing 50 Enclosure member 51 Lower opening 52 Upper opening 60 Refrigerant piping group 61 Suction Pipe 61a Suction joint part 62 Discharge pipe 62a Discharge joint part 63 Suction injection pipe 63a Suction injection joint part 64 Intermediate injection pipe 64a Intermediate injection joint part 70 Refrigerant leak sensor 100 Refrigeration system

JP2013-76478A

Claims (11)

A compressor (38) having a pressure vessel (38a), a suction portion (38b) for allowing the refrigerant to flow into the inside of the pressure vessel, and a discharge portion (38c) for allowing the refrigerant to flow out from the inside of the pressure vessel;
An enclosing member (50) surrounding the compressor to suppress the diffusion of the refrigerant;
A refrigerant leakage sensor (70) provided inside the enclosing member;
Heat exchangers (33A, 33B);
A valve (34);
A refrigerant pipe group (60) having a plurality of pipes respectively communicating with at least a part of the compressor, the heat exchanger, and the valve;
A casing (40) for housing the compressor, the surrounding member, the refrigerant leakage sensor, the heat exchanger, the valve, and the refrigerant pipe group;
A fan (35) for allowing air to pass through the heat exchanger;
Equipped with a,
Two openings (51, 52) are formed in the surrounding member,
The fan generates an air flow (F) inside the surrounding member from one of the two openings to the other,
The refrigerant leakage sensor is disposed in the air flow inside the surrounding member.
Refrigeration equipment (30A, 30B). A terminal (38d) for supplying power to the compressor located above the refrigerant leakage sensor;
Further comprising
The refrigeration apparatus according to claim 1. A suction joint (61a) connecting the suction part and the refrigerant pipe group;
A discharge joint portion (62a) connecting the discharge portion and the refrigerant pipe group;
Are provided inside the surrounding member,
The refrigeration apparatus according to claim 1 or 2. At least a part of the plurality of pipes included in the refrigerant pipe group has a curved portion (B),
The curved portion is provided inside the surrounding member,
The refrigeration apparatus according to any one of claims 1 to 3. A suction injection pipe (63) communicating with the suction part;
Further comprising
A suction injection joint (63a) connecting the suction injection pipe and the suction part is provided inside the surrounding member;
The refrigeration apparatus according to any one of claims 1 to 4. An intermediate injection pipe (64) communicating with the inside of the pressure vessel;
Further comprising
An intermediate injection joint (64a) connecting the intermediate injection pipe and the pressure vessel is provided inside the surrounding member,
The refrigeration apparatus according to any one of claims 1 to 5. The surrounding member is made of metal.
The refrigeration apparatus according to any one of claims 1 to 6. The heat exchanger and the valve are provided outside the surrounding member,
The refrigeration apparatus according to any one of claims 1 to 7. The two openings are
An upper opening (52) located above the refrigerant leakage sensor;
A lower opening (51) located below the refrigerant leakage sensor;
including,
The refrigeration apparatus according to any one of claims 1 to 8. The heat exchanger (33A) is a heat source side heat exchanger that functions as a condenser when providing cold energy to a user, or functions as an evaporator when providing warm temperature to a user.
The refrigeration apparatus (30A) according to any one of claims 1 to 9. The heat exchanger (33B) is a utilization side heat exchanger that functions as an evaporator when providing cold heat to the user or functions as a condenser when providing hot heat to the user.
The refrigeration apparatus (30B) according to any one of claims 1 to 9.

Images