JP2024002711A - Compressor, and refrigerant cycle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that a coat covering an outer surface of an accumulator is peeled off to easily cause rust on the whole outer surface because the outer surface of the accumulator is easily subjected to stress due to a temperature change and freezing and melting of a water content in the air by repetitively starting and stopping of a compressor.

SOLUTION: A compressor 19 includes a compressor body 12, an accumulator 17, and a fixing member 27, the compressor body 12 having a first casing 12f storing a compression mechanism 12d, the accumulator 17 being arranged outside the first casing 12f, the accumulator 17 having a second casing 17f connected to the compression mechanism 12d via a connection pipe 17h, the first casing 12f having a first outer surface 12s, the second casing 17f having a second outer surface 17s. At least a part of the first outer surface 12s is covered with a resin coat layer. At least a part of the second outer surface 17s is covered with a sprayed metal layer.

SELECTED DRAWING: Figure 5

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a compressor and a refrigerant cycle device.

Conventionally, as described in Patent Document 1 (Japanese Unexamined Patent Publication No. 2007-46572), a compressor body and an accumulator fixed to the compressor body are provided, and the outer surfaces of the compressor body and the accumulator are coated with resin. Compressors that are equipped with this technology are known.

As the compressor is repeatedly started and stopped, the outer surface of the accumulator is susceptible to stress due to temperature changes and freezing and thawing of moisture in the air. This causes a problem in that the resin coating covering the outer surface of the accumulator peels off, and rust is likely to occur on the entire outer surface of the accumulator.

The compressor of the first aspect includes a compressor main body, an accumulator, and a first member. The compressor main body has a first casing that houses the compression mechanism. The accumulator is arranged outside the first casing. The accumulator has a second casing connected to the compression mechanism via piping. The first member is a member for fixing the second casing to the first casing. The first casing has a first outer surface. The second casing has a second outer surface. At least a portion of the first outer surface is covered with a resin coating layer. At least a portion of the second outer surface is covered with a metal spray layer.

In the compressor of the first aspect, metal spraying is applied to at least a portion of the outer surface of the accumulator. Therefore, the paint on the outer surface of the accumulator is prevented from peeling off due to temperature changes and the freezing and thawing of moisture in the air, which occurs on the outer surface of the accumulator, thereby suppressing the occurrence of rust.

The compressor of the second aspect is the compressor of the first aspect, in which at least a portion of the outer surface of the piping is covered with a metal spray layer.

In the compressor of the second aspect, metal spraying is applied to at least a portion of the outer surface of the refrigerant pipe that connects the outlet side of the accumulator and the inlet side of the compressor main body. Therefore, the paint on the outer surface of the refrigerant pipe is prevented from peeling off and rust is generated due to temperature changes and freezing and thawing of moisture in the air that occur on the outer surface of the refrigerant pipe.

The compressor of the third aspect is the compressor of the first aspect or the second aspect, and the metal sprayed layer is an aluminum sprayed layer.

The compressor of the fourth aspect is the compressor of any one of the first to third aspects, and further includes a second member disposed around the first casing and the second casing. The second member is at least partially made of an elastic member.

In the compressor according to the fourth aspect, noise generated when vibrations generated during operation of the compressor body are transmitted to the outside of the compressor is suppressed.

The compressor according to the fifth aspect is the compressor according to the fourth aspect, and the second member includes a first layer, a second layer disposed inside the first layer, and a second layer disposed inside the second layer. and a third layer. The first layer is made of an elastic member. The second layer consists of a heat insulating member. The third layer is made of metal. The third layer contacts the first outer surface and does not contact the second outer surface.

In the compressor according to the fifth aspect, a metal film is pasted on the inside of the heat insulating member that covers the outer surface of the compressor body, so moisture adhering to the outer surface of the accumulator is transmitted through the heat insulating member to the outer surface of the compressor body. is suppressed from reaching .

The compressor of the sixth aspect is the compressor of the fourth aspect, and the second member has a first layer and a second layer disposed inside the first layer. The first layer is made of an elastic member. The second layer consists of a heat insulating member. The second layer has a first partial layer in contact with the first outer surface and a second partial layer in contact with the second outer surface. The second partial layer is not connected to the first partial layer.

In the compressor according to the sixth aspect, the heat insulating member covering the compressor body and the heat insulating member covering the accumulator are separated, so that moisture adhering to the outer surface of the accumulator is transmitted through the heat insulating member to the outer surface of the compressor main body. is suppressed from reaching .

The compressor of the seventh aspect is the compressor of the fourth aspect, and the second member has a first layer and a second layer disposed inside the first layer. The first layer is made of an elastic member. The second layer consists of a heat insulating member. The second layer contacts the first outer surface and does not contact the second outer surface.

In the compressor of the seventh aspect, since the accumulator is not covered with the heat insulating member, moisture adhering to the outer surface of the accumulator is suppressed from reaching the outer surface of the compressor main body through the heat insulating member.

The compressor of the eighth aspect is the compressor of any one of the first to seventh aspects, and the first member includes a nonmetallic member. The non-metallic member does not contact the first outer surface and contacts the second outer surface.

In the compressor of the eighth aspect, vibrations generated during operation of the compressor main body are suppressed from being transmitted to the accumulator.

A refrigerant cycle device according to a ninth aspect includes the compressor according to any one of the first to eighth aspects.

In the refrigerant cycle device of the ninth aspect, occurrence of problems such as leakage of refrigerant from the refrigerant piping due to rust generated on the outer surface of the refrigerant piping can be suppressed.

1 is a diagram showing a refrigerant circuit of an air conditioner 10. FIG. FIG. 7 is a plan view of the outdoor unit 11 with the top plate 71 removed. FIG. 3 is a perspective view of the outdoor unit 11 with a right front plate 76 and a right side plate 74 removed. 2 is a schematic configuration diagram of a compressor 19. FIG. 2 is a schematic configuration diagram of a compressor 19. FIG. FIG. 3 is a diagram showing a portion covered with a resin coating layer or a metal spray layer in the first embodiment. 5 is a schematic perspective view of the compressor 19 covered with a soundproof cover 50. FIG. FIG. 3 is a schematic cross-sectional view of the soundproof cover 50 taken along a horizontal plane near the vertical center of the compressor 19. FIG. 5 is a cross-sectional view of a first example of a soundproof cover 50 that covers the compressor 19. FIG. 5 is a sectional view of a second example of a soundproof cover 50 that covers the compressor 19. FIG. FIG. 6 is a cross-sectional view of a third example of a soundproof cover 50 that covers the compressor 19. 2 is a schematic configuration diagram of a compressor 19. FIG. FIG. 7 is a diagram showing a portion covered with a resin coating layer or a metal spray layer in Modifications A to C.

<First embodiment>
(1) Overall configuration The compressor 19 of this embodiment is included in a refrigerant cycle device. A refrigerant cycle device has a refrigerant circuit in which refrigerant circulates. In a refrigerant cycle device, a refrigeration cycle is repeated in which refrigerant in a refrigerant circuit is compressed, condensed (radiating heat), decompressed, evaporated (absorbing heat), and then compressed again. The compressor 19 compresses the gas refrigerant flowing through the refrigerant circuit.

In this embodiment, the refrigerant cycle device is an air conditioner 10 that performs heating and cooling in a building. As shown in FIG. 1, in the air conditioner 10, an outdoor unit 11 and an indoor unit 20 are connected via a liquid refrigerant communication pipe 2 and a gas refrigerant communication pipe 3. The outdoor unit 11 is a heat source side unit. The indoor unit 20 is a user-side unit.

The air conditioner 10 includes a refrigerant circuit in which a compressor 19, a four-way switching valve 15, an outdoor heat exchanger 13, an outdoor expansion valve 14, an indoor expansion valve 39, and an indoor heat exchanger 32 are connected by refrigerant piping. have A refrigerant is sealed in the refrigerant circuit. Examples of the refrigerant include R410A, R32, R407C, R22, R134a, and carbon dioxide.

(2) Detailed configuration of air conditioner 10 (2-1) Indoor unit 20
The indoor unit 20 is installed indoors in a building such as a building. The indoor unit 20 is installed on an indoor wall by being hung on a wall, or is installed by being embedded in or suspended from a ceiling in an indoor room. The indoor unit 20 includes an indoor expansion valve 39, an indoor heat exchanger 32, and an indoor fan 30.

(2-1-1) Indoor heat exchanger 32
The indoor heat exchanger 32 is, for example, a cross-fin type fin-and-tube type heat exchanger composed of heat exchanger tubes and a large number of fins. The indoor heat exchanger 32 functions as a refrigerant heat absorber (evaporator) during cooling operation to cool indoor air. The indoor heat exchanger 32 functions as a refrigerant radiator (condenser) during heating operation to heat indoor air.

(2-1-2) Indoor fan 30
The indoor fan 30 supplies indoor heat exchanger 32 with indoor air that undergoes heat exchange with the refrigerant flowing through indoor heat exchanger 32 .

The indoor fan 30 has an indoor fan motor 30a that is a driving source. The air conditioner 10 can change the amount of air supplied to the indoor heat exchanger 32 by changing the rotation speed of the indoor fan motor 30a.

(2-1-3) Indoor expansion valve 39
The indoor expansion valve 39 is a mechanism for reducing the pressure of the refrigerant flowing through the refrigerant circuit during cooling operation. The indoor expansion valve 39 is an electrically operated valve whose opening degree can be adjusted. The indoor expansion valve 39 adjusts the refrigerant pressure and refrigerant flow rate.

(2-2) Outdoor unit 11
The outdoor unit 11 is installed outside a building such as a building. The outdoor unit 11 is connected to the indoor unit 20 via a liquid refrigerant communication pipe 2 and a gas refrigerant communication pipe 3.

(2-2-1) Casing 70
The outdoor unit 11 has a casing 70 having a substantially rectangular parallelepiped shape. As shown in FIG. 2, the internal space of the casing 70 is divided into a blower room R1 and a machine room R2 by a partition plate 78 extending in the vertical direction. An outdoor heat exchanger 13 and an outdoor fan 16 are installed in the blower room R1. A compressor 19, a four-way switching valve 15, and an outdoor expansion valve 14 are installed in the machine room R2.

As shown in FIGS. 2 and 3, the casing 70 includes a top plate 71, a bottom plate 72, a left side plate 73 which is a side plate of the blower room R1, a right side plate 74 which is a side plate of the machine room R2, and a blower room. It has a left front plate 75, which is the front plate of R1, and a right front plate 76, which is the front plate of machine room R2. A liquid shutoff valve 4 and a gas shutoff valve 5 are arranged below the right side plate 74. The liquid shutoff valve 4 is connected to the end of the liquid refrigerant communication pipe 2. The gas shutoff valve 5 is connected to the end of the gas refrigerant communication pipe 3.

(2-2-2) Compressor 19
As shown in FIG. 4, the compressor 19 mainly includes a compressor main body 12 and an accumulator 17. The accumulator 17 separates the gas-liquid two-phase low-pressure refrigerant flowing through the refrigerant circuit into gas refrigerant and liquid refrigerant, and supplies only the low-pressure gas refrigerant to the compressor main body 12 . The compressor main body 12 compresses the low pressure gas refrigerant supplied from the accumulator 17 and discharges the high pressure gas refrigerant.

The compressor main body 12 is a hermetic compressor having a compression mechanism 12d driven by a compressor motor 12a. The compression mechanism 12d compresses the gas refrigerant. The compression mechanism 12d is, for example, a rotary compression mechanism or a scroll compression mechanism. The compression mechanism 12d can change the capacity of the gas refrigerant to be compressed by inverter control. The compressor main body 12 has a first casing 12f. The first casing 12f is a metal container that houses the compressor motor 12a, the compression mechanism 12d, and the like. A discharge pipe 12g extending upward is attached to the upper surface of the first casing 12f. The discharge pipe 12g is, for example, a copper pipe.

The accumulator 17 is arranged outside the first casing 12f of the compressor main body 12. The accumulator 17 has a second casing 17f. The second casing 17f is a metal container in which a gas-liquid two-phase refrigerant is separated into a gas refrigerant and a liquid refrigerant. A suction pipe 17g extending upward is attached to the upper surface of the second casing 17f. The suction pipe 17g is, for example, a copper pipe. Two connecting pipes 17h extending downward are attached to the lower surface of the second casing 17f. The connection pipe 17h has an L-shape bent so as to extend in the horizontal direction below the second casing 17f. The end of the horizontally extending portion of the connecting pipe 17h passes through the side surface of the first casing 12f and is connected to the compression mechanism 12d. The connection pipe 17h is, for example, a copper pipe. The connection pipe 17h extends in the internal space of the second casing 17f to a position above the vertical center of the second casing 17f. Only one connection pipe 17h may be attached to the lower surface of the second casing 17f.

The gas-liquid two-phase refrigerant flowing through the refrigerant circuit flows through the suction pipe 17g and is supplied into the second casing 17f of the accumulator 17. Inside the second casing 17f, the gas-liquid two-phase refrigerant is separated into a gas refrigerant and a liquid refrigerant. The separated liquid refrigerant is stored in the second casing 17f. The separated low-pressure gas refrigerant flows through the connection pipe 17h and is supplied to the compression mechanism 12d within the first casing 12f of the compressor main body 12. The compression mechanism 12d compresses a low pressure gas refrigerant to generate a high pressure gas refrigerant. The high-pressure gas refrigerant is discharged from the compression mechanism 12d into the internal space of the first casing 12f, flows through the discharge pipe 12g, and is supplied to the refrigerant circuit.

The compressor main body 12 and the accumulator 17 are arranged such that the first casing 12f and the second casing 17f are separated from each other. The compressor main body 12 and the accumulator 17 are connected to each other by a fixing member 27. The fixing member 27 is a member for fixing the second casing 17f to the first casing 12f. The fixing member 27 is, for example, a metal member that clamps the first casing 12f and the second casing 17f. The material of the fixing member 27 is, for example, stainless steel.

(2-2-3) Outdoor heat exchanger 13
The outdoor heat exchanger 13 is, for example, a cross-fin type fin-and-tube type heat exchanger composed of heat exchanger tubes and a large number of fins. The outdoor heat exchanger 13 functions as a refrigerant radiator (condenser) during cooling operation. The outdoor heat exchanger 13 functions as a refrigerant heat absorber (evaporator) during heating operation. One end of the outdoor heat exchanger 13 is connected to a four-way switching valve 15 . The other end of the outdoor heat exchanger 13 is connected to an outdoor expansion valve 14 .

(2-2-4) Outdoor expansion valve 14
The outdoor expansion valve 14 is a mechanism for reducing the pressure of the refrigerant flowing through the refrigerant circuit during heating operation. The outdoor expansion valve 14 is an electrically operated valve whose opening degree can be adjusted. The outdoor expansion valve 14 adjusts refrigerant pressure and refrigerant flow rate.

(2-2-5) Four-way switching valve 15
The four-way switching valve 15 has four ports. The first port P1 is connected to the discharge side of the compressor 19 (discharge pipe 12g). The second port P2 is connected to the suction side of the compressor 19 (suction pipe 17g). The third port P3 is connected to the gas side of the outdoor heat exchanger. The fourth port P4 is connected to the gas shutoff valve 5.

The four-way switching valve 15 can be switched between a first state (the state shown by the solid line in FIG. 1) and a second state (the state shown by the broken line in FIG. 1). In the four-way switching valve 15 in the first state, the first port P1 and the third port P3 communicate with each other, and the second port P2 and the fourth port P4 communicate with each other. In the four-way switching valve 15 in the second state, the first port P1 and the fourth port P4 communicate with each other, and the second port P2 and the third port P3 communicate with each other.

(2-2-6) Outdoor fan 16
The outdoor fan 16 is arranged to face the outdoor heat exchanger 13 in the blower room R1. The outdoor fan 16 supplies the outdoor heat exchanger 13 with outdoor air that undergoes heat exchange with the refrigerant flowing through the outdoor heat exchanger 13 . The outdoor fan 16 guides outdoor air into the blower room R1 and blows out the heat-exchanged outdoor air to the outside of the casing 70.

The outdoor fan 16 has an outdoor fan motor 16a that is a driving source. The air conditioner 10 can change the amount of air supplied to the outdoor heat exchanger 13 by changing the rotation speed of the outdoor fan motor 16a.

(3) Operation of the air conditioner 10 The air conditioner 10 performs cooling operation and heating operation. When the cooling operation and the heating operation start, the compression mechanism 12d, the indoor fan 30, and the outdoor fan 16 transition from a stopped state to an operating state.

(3-1) Cooling operation In the cooling operation, the four-way switching valve 15 is in the state shown by the solid line in FIG. 1. Thereby, in the refrigerant circuit, a refrigeration cycle is performed in which the outdoor heat exchanger 13 serves as a condenser and the indoor heat exchanger 32 serves as an evaporator.

Specifically, the refrigerant compressed by the compressor main body 12 passes through the outdoor heat exchanger 13 and exchanges heat with outdoor air. In the outdoor heat exchanger 13, the refrigerant radiates heat to the outdoor air and condenses. The refrigerant that has radiated heat in the outdoor heat exchanger 13 is sent to the indoor unit 20.

In the indoor unit 20 , the refrigerant is depressurized by the indoor expansion valve 39 , passes through the indoor heat exchanger 32 , and exchanges heat with indoor air supplied from the indoor fan 30 . In the indoor heat exchanger 32, the refrigerant absorbs heat from the indoor air and evaporates, and the indoor air is cooled by the refrigerant.

The air cooled by the indoor heat exchanger 32 is supplied to the indoor space. The refrigerant evaporated in the indoor heat exchanger 32 is sent to the outdoor unit 11, sucked into the compressor main body 12, and compressed again.

(3-2) Heating operation In the heating operation, the four-way switching valve 15 is in the state shown by the broken line in FIG. Thereby, in the refrigerant circuit, a refrigeration cycle is performed in which the indoor heat exchanger 32 serves as a condenser and the outdoor heat exchanger 13 serves as an evaporator.

Specifically, the refrigerant compressed by the compressor main body 12 passes through the indoor heat exchanger 32 of the indoor unit 20 and exchanges heat with indoor air supplied from the indoor fan 30. In the indoor heat exchanger 32, the refrigerant radiates heat to indoor air and condenses, and the indoor air is heated by the refrigerant.

The air heated by the indoor heat exchanger 32 is supplied to the indoor space. The refrigerant that has radiated heat in the indoor heat exchanger 32 is sent to the outdoor unit 11, is depressurized in the outdoor expansion valve 14, and then passes through the outdoor heat exchanger 13 to exchange heat with outdoor air. In the outdoor heat exchanger 13, the refrigerant absorbs heat from the outdoor air and evaporates. The refrigerant evaporated in the outdoor heat exchanger 13 is sucked into the compressor main body 12 and compressed again.

(4) Description of the first casing 12f and the second casing 17f The first casing 12f of the compressor main body 12 has a first outer surface 12s that is an outer surface. The second casing 17f of the accumulator 17 has a second outer surface 17s that is an outer surface.

The first outer surface 12s is coated with resin. Thereby, at least a portion of the first outer surface 12s is covered with the resin coating layer. The thickness of the resin coating layer is 10 μm to 1000 μm. The thickness of the resin coating layer is preferably 10 μm to 100 μm.

Metal spraying is applied to the second outer surface 17s. Thereby, at least a portion of the second outer surface 17s is covered with the metal sprayed layer. The thickness of the metal spray layer is 100 μm to 3000 μm. The thickness of the metal spray layer is preferably 300 μm to 1000 μm.

The metal used for metal spraying on the second outer surface 17s preferably has a greater tendency to ionize than the metal that is the material of the second casing 17f. For example, when the material of the second casing 17f is iron, the metal used for metal spraying on the second outer surface 17s is aluminum. In this embodiment, at least a portion of the second outer surface 17s is covered with an aluminum sprayed layer by spraying aluminum. Instead of aluminum, an aluminum alloy may be used for metal spraying on the second outer surface 17s.

In this embodiment, the entire first outer surface 12s is covered with a resin coating layer. In this embodiment, the entire second outer surface 17s is covered with a metal sprayed layer. In FIG. 5, the first outer surface 12s covered with the resin coating layer is shown as a region hatched with a broken line, and the range of the second outer surface 17s covered with the metal spray layer is shown hatched with a solid line. The area shown is as follows:

(5) Features (5-1)
While the air conditioner 10 is operating (cooling operation or heating operation), low-temperature, low-pressure refrigerant before being compressed by the compressor main body 12 flows into the second casing 17f of the accumulator 17 from the suction pipe 17g. Inflow. Therefore, when the air conditioner 10 starts operating, the temperature of the second outer surface 17s of the accumulator 17 decreases. When the temperature of the second outer surface 17s falls below freezing, the moisture in the air around the accumulator 17 freezes, and ice adheres to the second outer surface 17s. When the operation of the air conditioner 10 is stopped in this state, the temperature of the second outer surface 17s increases, and the ice adhering to the second outer surface 17s melts. As described above, by repeatedly starting and stopping the operation of the air conditioner 10, the second outer surface 17s of the accumulator 17 is susceptible to cold stress due to temperature changes and freezing and thawing of moisture in the air. Even if a resin coating is applied to the second outer surface 17s for the purpose of suppressing the occurrence of rust on the second outer surface 17s, the resin is susceptible to cold and heat stress, and the resin coating layer easily peels off from the second outer surface 17s. There is.

In the compressor 19 of this embodiment, the first outer surface 12s of the compressor main body 12 is coated with resin, and the second outer surface 17s of the accumulator 17 is coated with metal spraying. The metal spray layer covering the second outer surface 17s is more resistant to thermal stress than the resin coating layer. Therefore, the metal spray layer is difficult to peel off from the second outer surface 17s of the accumulator 17 due to repeated start and stop of operation of the air conditioner 10.

Therefore, in the compressor 19 of this embodiment, the occurrence of rust on the second outer surface 17s of the accumulator 17 is suppressed. Moreover, the occurrence of defects such as holes being formed in the second outer surface 17s due to rust on the second outer surface 17s and leakage of refrigerant from the internal space of the second casing 17f is suppressed.

(5-2)
When the compressor 19 of this embodiment is used in a refrigerator installed in a refrigerated truck or the like, the temperature of the refrigerant flowing into the second casing 17f from the suction pipe 17g is very low, for example, −15° C. or lower. It may become. In that case, the second outer surface 17s of the accumulator 17 is likely to receive strong cold stress due to repeated start and stop of operation of the air conditioner 10. Therefore, by applying metal spraying to the second outer surface 17s of the accumulator 17, peeling off of the metal spray layer from the second outer surface 17s is suppressed.

Therefore, the compressor 19 of this embodiment is effective in suppressing the occurrence of a malfunction in the refrigerant cycle device in which the temperature of the refrigerant before being compressed by the compressor main body 12 becomes extremely low.

(5-3)
In the compressor 19 of this embodiment, the first outer surface 12s of the compressor main body 12 is coated with resin. Only the gas refrigerant separated within the second casing 17f of the accumulator 17 is supplied into the first casing 12f of the compressor main body 12. The temperature of the gas refrigerant separated within the accumulator 17 and supplied into the first casing 12f is higher than the temperature of the refrigerant before being separated within the accumulator 17. Therefore, the cold stress that the first outer surface 12s of the compressor body 12 receives is smaller than the cold stress that the second outer surface 17s of the accumulator 17 receives.

Therefore, the resin coating layer covering the first outer surface 12s of the compressor body 12 is unlikely to peel off due to cold stress caused by repeated start and stop of operation of the air conditioner 10. Metal spraying is more expensive than resin coating, so by applying resin coating to the first outer surface 12s of the compressor body 12, costs can be reduced compared to applying metal coating to the first outer surface 12s. can. Further, by applying a resin coating to the first outer surface 12s, generation of rust on the first outer surface 12s can be suppressed.

(5-4)
In the compressor 19 of this embodiment, at least a portion of the second outer surface 17s is covered with an aluminum spray layer. Thermal spraying using aluminum is less expensive and has higher adhesion to the second outer surface 17s than thermal spraying using other metals such as zinc.

For example, when the material of the second casing 17f is iron, the metal sprayed layer exhibits a sacrificial anticorrosion effect by spraying aluminum, which has a greater ionization tendency than iron, on the second outer surface 17s. Therefore, even if the metal spray layer peels off and a part of the second outer surface 17s is exposed to the outside air, the surrounding metal spray layer is likely to be eluted earlier than the exposed area, so rust on the second casing 17f The occurrence of is suppressed.

<Second embodiment>
The compressor 19 and air conditioner 10 of this embodiment have the same basic configuration and operation as the compressor 19 and air conditioner 10 of the first embodiment. Hereinafter, differences from the first embodiment will be mainly explained.

(1) Overall configuration of soundproof cover 50 The compressor 19 of this embodiment is covered with a soundproof cover 50. Specifically, in FIG. 3, a soundproof cover 50 that covers the compressor 19 is disposed on the back side of a shutoff valve mounting plate 90 to which the liquid shutoff valve 4 and the gas shutoff valve 5 are attached. This suppresses noise generated when vibrations of the compressor main body 12 are transmitted to the outside of the compressor 19.

As shown in FIG. 6, a discharge pipe 12g and a suction pipe 17g protrude from the upper part of the soundproof cover 50. In this embodiment, as shown in FIG. 7, the soundproof cover 50 is arranged so as to be wrapped around the compressor main body 12 and the accumulator 17. In this case, the soundproof cover 50 is composed of, for example, one sheet that covers the compressor main body 12, the accumulator 17, the connecting pipe 17h, a part of the discharge pipe 12g, and a part of the suction pipe 17g.

The soundproof cover 50 may be composed of a plurality of members. For example, the soundproof cover 50 may be configured by bonding together a member that covers the compressor 19 from a first direction and a member that covers the compressor 19 from a second direction different from the first direction.

It is preferable that the soundproof cover 50 is arranged so that an air layer is formed between the first casing 12f of the compressor main body 12 and the second casing 17f of the accumulator 17. Thereby, the portion where the soundproof cover 50 contacts the compressor main body 12 can be made small, so vibrations of the compressor main body 12 are less likely to be transmitted to the soundproof cover 50, and noise during operation of the air conditioner 10 is suppressed.

At least a portion of the soundproof cover 50 is made of an elastic member. The elastic member is, for example, a polymer such as rubber or resin. As a result, part of the vibration of the compressor main body 12 is absorbed by the soundproof cover 50, so that noise during operation of the air conditioner 10 is suppressed.

(2) Specific example of the soundproof cover 50 Next, a specific example of the structure of the soundproof cover 50 will be described with reference to FIGS. 8 to 11. 8 to 11 are cross-sectional views similar to FIG. 7.

In the following three examples of the soundproof cover 50, at least a portion of the soundproof cover 50 has a layered structure in which multiple types of materials are laminated. In this case, the soundproof cover 50 is, for example, a sheet-like member obtained by laminating predetermined materials and molded into a predetermined shape by applying pressure in a high-temperature mold.

(2-1) First example of soundproof cover 50 As shown in FIG. 8, a first example of soundproof cover 50 includes a first layer 51a, a second layer 51b, and a third layer 51c. The second layer 51b is arranged inside the first layer 51a. The third layer 51c is arranged inside the second layer 51b. The first layer 51a is made of an elastic member. The first layer 51a is the outermost layer of the soundproof cover 50 and is arranged around the entire circumference of the compressor 19. The second layer 51b is made of a heat insulating member. The heat insulating member is, for example, felt and glass wool. The second layer 51b is arranged around the entire circumference of the compressor 19. The third layer 51c is made of metal, for example, an aluminum film. The third layer 51c is arranged around a part of the compressor 19.

The second layer 51b is in contact with the entire inner surface of the first layer 51a. The third layer 51c is in contact with a part of the inner surface of the second layer 51b. The third layer 51c contacts the first outer surface 12s of the compressor main body 12 and does not contact the second outer surface 17s of the accumulator 17. Therefore, the first outer surface 12s is in contact with the third layer 51c, and the second outer surface 17s is in contact with the second layer 51b.

In the first example of the soundproof cover 50, a metal film (second layer 51b) is pasted on the inside of a heat insulating member (second layer 51b) that covers the first outer surface 12s of the compressor main body 12. Therefore, even if moisture adhering to the second outer surface 17s of the accumulator 17 is absorbed by the heat insulating member and transmitted from the accumulator 17 side to the compressor main body 12 side, the water in the heat insulating member is transferred to the first outer surface 17s of the compressor main body 12. Adhesion to the outer surface 12s is suppressed by the metal film. Therefore, the occurrence of rust on the first outer surface 12s due to moisture adhering to the first outer surface 12s of the compressor main body 12 is suppressed.

Note that, as described above, the soundproof cover 50 is arranged such that an air layer is formed between the first outer surface 12s and the third layer 51c and between the second outer surface 17s and the second layer 51b. It is preferable that the

(2-2) Second example of soundproof cover 50 As shown in FIG. 9, a second example of soundproof cover 50 has a first layer 52a and a second layer 52b. The second layer 52b is arranged inside the first layer 52a. The first layer 52a is made of an elastic member. The first layer 52a is the outermost layer of the soundproof cover 50 and is arranged around the entire circumference of the compressor 19. The second layer 52b is made of a heat insulating member. The heat insulating member is, for example, felt and glass wool. The second layer 52b is arranged around a part of the compressor 19.

The second layer 52b is in contact with a portion of the inner surface of the first layer 52a. Specifically, the second layer 52b includes a first partial layer 52b1 and a second partial layer 52b2. The first partial layer 52b1 is not connected to the second partial layer 52b2. In other words, a gap is formed between the first partial layer 52b1 and the second partial layer 52b2 in which no heat insulating member exists.

The first partial layer 52b1 is in contact with the first outer surface 12s of the compressor main body 12, and the second partial layer 52b2 is in contact with the second outer surface 17s of the accumulator 17. Therefore, the first outer surface 12s and the second outer surface 17s are in contact with the second layer 52b.

In the second example of the soundproof cover 50, a heat insulating member (first partial layer 52b1) that covers the compressor body 12 and a heat insulating member (second partial layer 52b2) that covers the accumulator 17 are separated. Therefore, even if the moisture adhering to the second outer surface 17s of the accumulator 17 is absorbed by the heat insulating member, the moisture in the heat insulating member is suppressed from being transmitted from the accumulator 17 side to the compressor main body 12 side. Adhesion of moisture to the first outer surface 12s of the main body 12 is suppressed. Therefore, the occurrence of rust on the first outer surface 12s due to moisture adhering to the first outer surface 12s of the compressor main body 12 is suppressed.

Note that, as described above, the soundproof cover is arranged such that an air layer is formed between the first outer surface 12s and the first partial layer 52b1 and between the second outer surface 17s and the second partial layer 52b2. 50 are preferably arranged.

(2-3) Third example of soundproof cover 50 As shown in FIG. 10, a third example of soundproof cover 50 has a first layer 53a and a second layer 53b. The second layer 53b is arranged inside the first layer 53a. The first layer 53a is made of an elastic member. The first layer 53a is the outermost layer of the soundproof cover 50 and is arranged around the entire circumference of the compressor 19. The second layer 53b is made of a heat insulating member. The heat insulating member is, for example, felt and glass wool. The second layer 53b is arranged around a part of the compressor 19.

The second layer 53b is in contact with a part of the inner surface of the first layer 53a. The second layer 53b contacts the first outer surface 12s of the compressor main body 12 and does not contact the second outer surface 17s of the accumulator 17. Therefore, the first outer surface 12s is in contact with the second layer 53b, and the second outer surface 17s is in contact with the first layer 53a.

In the third example of the soundproof cover 50, the accumulator 17 is not covered with a heat insulating member (second layer 53b). Therefore, the moisture adhering to the second outer surface 17s of the accumulator 17 is not absorbed by the heat insulating member, so the moisture in the heat insulating member is transferred from the accumulator 17 side to the compressor main body 12 side, and the first outer surface of the compressor main body 12 Adhesion of moisture to 12s is suppressed. Therefore, the occurrence of rust on the first outer surface 12s due to moisture adhering to the first outer surface 12s of the compressor main body 12 is suppressed.

Note that, as described above, the soundproof cover 50 is arranged such that an air layer is formed between the first outer surface 12s and the second layer 53b and between the second outer surface 17s and the first layer 53a. It is preferable that the

<Modified example>
In FIG. 11 related to Modifications A to C below, a first outer surface 12s covered with a resin coating layer is shown as a region hatched with a broken line, and a second outer surface 17s covered with a metal spray layer. The range is shown as a solid hatched area.

(1) Modification A
The suction pipe 17g attached to the accumulator 17 may be subjected to metal spraying. In this case, as shown in FIG. 11, a part of the outer surface of the suction pipe 17g is covered with a metal spray layer. The metal sprayed layer is, for example, an aluminum sprayed layer. The portion covered with the metal spray layer is a predetermined range including the connection portion between the second casing 17f of the accumulator 17 and the suction pipe 17g.

The suction pipe 17g is susceptible to cold stress because a low-temperature, low-pressure refrigerant flows therein. Therefore, by applying metal spraying to the outer surface of the suction pipe 17g, the occurrence of rust on the outer surface of the suction pipe 17g can be suppressed. This suppresses the occurrence of problems such as leakage of refrigerant from the suction pipe 17g.

(2) Modification B
The outer surface of the connecting pipe 17h attached to the accumulator 17 may be subjected to metal spraying. In this case, as shown in FIG. 11, a part of the outer surface of the connecting pipe 17h is covered with a metal spray layer. The metal sprayed layer is, for example, an aluminum sprayed layer. The portion covered with the metal spray layer is a predetermined range including the connection portion between the second casing 17f of the accumulator 17 and the connection pipe 17h.

Since a low-temperature, low-pressure refrigerant flows through the connecting pipe 17h, it is susceptible to cold stress. Therefore, by applying metal spraying to the outer surface of the connecting pipe 17h, the occurrence of rust on the outer surface of the connecting pipe 17h can be suppressed. This suppresses the occurrence of problems such as leakage of refrigerant from the connection pipe 17h.

Further, resin coating may be further applied to the outer surface of the connecting pipe 17h. In this case, as shown in FIG. 11, a part of the outer surface of the connecting pipe 17h is covered with a resin coating layer. The portion covered with the resin coating layer is a predetermined range including the connection portion between the first casing 12f of the compressor main body 12 and the connection pipe 17h. The resin coating layer is formed in a range away from the metal spray layer.

(3) Modification C
The outer surface of the discharge pipe 12g attached to the compressor main body 12 may be further coated with a resin coating. In this case, as shown in FIG. 11, a part of the outer surface of the discharge pipe 12g is covered with a resin coating layer. The portion covered with the resin coating layer is a predetermined range including the connection portion between the first casing 12f of the compressor main body 12 and the discharge pipe 12g.

(4) Modification D
In the embodiment, the second outer surface 17s of the second casing 17f of the accumulator 17 is covered with a metal spray layer. In this case, metal spraying may be applied to the second outer surface 17s so that the thickness of the metal spray layer varies depending on the position on the second outer surface 17s.

For example, metal spraying may be applied to the second outer surface 17s so that the thickness of the metal spray layer changes along the vertical direction. Since the liquid refrigerant is stored in the lower part of the internal space of the second casing 17f, during operation of the air conditioner 10, the temperature at the lower part of the second outer surface 17s is lower than the temperature at the upper part of the second outer surface 17s. It shows a tendency to become lower. Therefore, even if the second outer surface 17s is sprayed with metal so that the thickness of the metal spray layer on the lower part of the second outer surface 17s is larger than the thickness of the metal spray layer on the upper part of the second outer surface 17s, good. The lower portion of the second outer surface 17s is, for example, a portion below the vertical center of the second casing 17f. The upper part of the second outer surface 17s is, for example, a portion above the vertical center of the second casing 17f.

Furthermore, the second outer surface 17s may be sprayed with metal such that the thickness of the metal sprayed layer increases gradually as it goes downward, or increases stepwise as it goes downward.

The greater the thickness of the metal sprayed layer covering the second outer surface 17s, the more difficult it is for the metal sprayed layer to peel off from the second outer surface 17s due to cold stress. The cold stress that the second outer surface 17s of the second casing 17f receives tends to become stronger as it goes downward in the vertical direction. Therefore, by applying metal spraying to the second outer surface 17s so that the thickness of the metal spray layer changes along the vertical direction, the occurrence of rust on the second outer surface 17s of the accumulator 17 can be suppressed.

(5) Modification E
When the fixing member 27 is a metal member that clamps the first casing 12f and the second casing 17f, a non-metallic member may be arranged between the fixing member 27 and the first casing 12f. The non-metallic member is, for example, an elastic member such as rubber. This suppresses vibrations of the compressor main body 12 from being transmitted to the accumulator 17 via the fixing member 27 while the air conditioner 10 is in operation. Therefore, the noise generated when the vibrations of the compressor main body 12 are transmitted to the outside of the compressor 19 is suppressed.

Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure as described in the claims. .

10: Air conditioner (refrigerant cycle device)
12: Compressor body 12d: Compression mechanism 12f: First casing 12s: First outer surface 17: Accumulator 17f: Second casing 17h: Connection piping (piping)
17s: Second outer surface 19: Compressor 27: Fixed member (first member)
50: Soundproof cover (second member)
51a, 52a, 53a: First layer 51b, 52b, 53b: Second layer 51c: Third layer 52b1: First partial layer 52b2: Second partial layer

Japanese Patent Application Publication No. 2007-46572

Claims (9)

a compressor main body (12) having a first casing (12f) that houses a compression mechanism (12d);
an accumulator (17) having a second casing (17f) arranged outside the first casing and connected to the compression mechanism via piping (17h);
a first member (27) for fixing the second casing to the first casing;
Equipped with
The first casing has a first outer surface (12s),
The second casing has a second outer surface (17s),
At least a portion of the first outer surface is covered with a resin coating layer,
at least a portion of the second outer surface is covered with a metal spray layer;
Compressor (19). At least a portion of the outer surface of the pipe is covered with a metal spray layer.
A compressor according to claim 1. the metal sprayed layer is an aluminum sprayed layer,
The compressor according to claim 1 or 2. further comprising a second member (50) disposed around the first casing and the second casing, at least a portion of which is made of an elastic member;
The compressor according to claim 1 or 2. The second member is
a first layer (51a) made of the elastic member;
a second layer (51b) disposed inside the first layer and made of a heat insulating member;
a third layer (51c) disposed inside the second layer and made of metal;
has
the third layer contacts the first outer surface and does not contact the second outer surface;
The compressor according to claim 4. The second member is
a first layer (52a) made of the elastic member;
a second layer (52b) disposed inside the first layer and made of a heat insulating member;
has
The second layer is
a first partial layer (52b1) in contact with the first outer surface;
a second partial layer (52b2) in contact with the second outer surface and not connected to the first partial layer;
has,
The compressor according to claim 4. The second member is
a first layer (53a) made of the elastic member;
a second layer (53b) disposed inside the first layer and made of a heat insulating member;
has
the second layer contacts the first outer surface and does not contact the second outer surface;
The compressor according to claim 4. The first member includes a non-metallic member,
The non-metallic member does not contact the first outer surface and contacts the second outer surface.
The compressor according to claim 1 or 2. The compressor according to claim 1 or 2 is provided.
Refrigerant cycle device (10).

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