阅读说明：本技术 空调装置 (Air conditioner ) 是由 三浦贤 中原信二 栗山卓也 于 2018-10-16 设计创作，主要内容包括：本发明的空调装置(1)包括：储集器(12)；具有用于压缩制冷剂的压缩部(24)的压缩机(13)；将制冷剂从储集器(12)引导至压缩机(13)的吸入管(18)；将冷冻机油从储集器(12)的底部引导至吸入管(18)的回油管(19)；设置于回油管(19)的电磁阀(20)；以及设置在压缩部(24)的上游侧并且具有比储集于吸入管(18)的液体状制冷剂的最大容积要大的特定容积的储液部(30)。(An air conditioning device (1) according to the present invention comprises: a reservoir (12); a compressor (13) having a compression unit (24) for compressing a refrigerant; a suction pipe (18) that guides the refrigerant from the reservoir (12) to the compressor (13); an oil return pipe (19) for guiding the refrigerating machine oil from the bottom of the reservoir (12) to the suction pipe (18); an electromagnetic valve (20) provided in the oil return pipe (19); and a liquid reservoir (30) which is provided on the upstream side of the compression section (24) and has a specific volume larger than the maximum volume of the liquid refrigerant pooled in the suction pipe (18).)

1. An air conditioning apparatus, comprising:

a reservoir;

a compressor having a compression portion for compressing a refrigerant;

a suction pipe that guides at least refrigerant from the accumulator to the compressor;

a return pipe that guides at least the refrigerator oil from a bottom of the reservoir to the suction pipe;

the electromagnetic valve is arranged on the oil return pipe; and

a liquid reservoir portion provided on an upstream side of the compression portion and having a specific volume larger than a maximum volume of the liquid-like refrigerant pooled in the suction pipe.

2. The air conditioner according to claim 1,

the specific volume is greater than that portion of the suction tube below the liquid level of the maximum reservoir volume of the reservoir.

3. An air conditioning apparatus as set forth in claim 1, comprising:

a motor for operating the compression unit;

a compressor housing that houses the compression unit and the motor; and

and the liquid storage tank is arranged outside the shell of the compressor and is provided with the liquid storage part.

4. An air conditioning apparatus as set forth in claim 1, comprising:

a motor for operating the compression unit; and

a compressor housing that houses the compression portion and the motor and has the liquid storage portion.

Technical Field

Embodiments of the present invention relate to an air conditioner.

Background

In the air conditioner, when the liquid refrigerant that is not completely evaporated by the heat exchanger is sucked into the compressor, the compressor may malfunction. Therefore, before the refrigerant enters the compressor, a reservoir that accumulates the liquid-like refrigerant is provided. The accumulator is connected to an oil return pipe for returning the refrigerating machine oil contained in the refrigerant to a suction pipe connected to a suction port of the compressor. The electromagnetic valve arranged on the oil return pipe is opened when the compressor runs and is closed when the compressor stops.

Disclosure of Invention

Technical problem to be solved by the invention

In the air conditioner, when a failure occurs in a state in which a solenoid valve of a return pipe connected from a reservoir to a suction pipe is opened, liquid refrigerant flows out from the reservoir through the return pipe and is stored in the suction pipe when the air conditioner is stopped. When the air conditioner is started in this state, the liquid refrigerant accumulated in the suction pipe may flow into the compressor at a burst, and the compressor may malfunction.

An embodiment of the present invention has been made in view of the above circumstances, and an object thereof is to provide an air conditioner capable of preventing a failure of a compressor even when a failure occurs in an electromagnetic valve of an oil return pipe and a liquid refrigerant is accumulated in a suction pipe.

Technical scheme for solving technical problem

An air conditioning apparatus according to an embodiment of the present invention includes: a reservoir; a compressor having a compression portion for compressing a refrigerant; a suction pipe that guides at least refrigerant from the accumulator to the compressor; a return pipe that guides at least the refrigerator oil from a bottom of the reservoir to the suction pipe; the electromagnetic valve is arranged on the oil return pipe; and a liquid reservoir portion provided on an upstream side of the compression portion and having a specific volume larger than a maximum volume of the liquid refrigerant pooled in the suction pipe.

In the air conditioning apparatus according to the embodiment of the present invention, the specific volume is larger than a portion of the volume of the suction pipe below a liquid level of the maximum amount of the liquid stored in the reservoir.

An air conditioning apparatus according to an embodiment of the present invention includes: a motor for operating the compression unit; a compressor housing that houses the compression unit and the motor; and a liquid storage tank which is arranged outside the compressor shell and is provided with the liquid storage part.

An air conditioning apparatus according to an embodiment of the present invention includes: a motor for operating the compression unit; and a compressor housing that houses the compression portion and the motor and has the liquid reservoir portion.

Drawings

Fig. 1 is a configuration diagram illustrating a refrigeration cycle of an air conditioner according to embodiment 1.

Fig. 2 is a sectional view showing the compressor and the reservoir of embodiment 1.

Fig. 3 is a configuration diagram showing a refrigeration cycle of the air conditioner according to embodiment 2.

Fig. 4 is a sectional view showing the compressor and the reservoir of embodiment 2.

Detailed Description

(embodiment mode 1)

The present embodiment will be described below with reference to the drawings. First, an air conditioner according to embodiment 1 will be described with reference to fig. 1 to 2. Reference numeral 1 in fig. 1 denotes an air conditioner. The air conditioner 1 includes an outdoor unit 2 installed outdoors and an indoor unit 3 installed indoors.

The outdoor unit 2 and the indoor unit 3 are connected by a liquid-side pipe 4 for mainly guiding a liquid refrigerant and a gas-side pipe 5 for mainly guiding a gas refrigerant. A refrigeration cycle is configured by circulating a refrigerant between the outdoor unit 2 and the indoor unit 3.

The indoor unit 3 includes: an indoor heat exchanger 6 that exchanges heat between the refrigerant and the indoor air, an indoor fan 7 that blows air from the indoor heat exchanger 6 and blows the air to the room to be air-conditioned, and an electric expansion valve 8 that expands the refrigerant. A liquid-side pipe 4 is connected to one end of the indoor heat exchanger 6 via an electric expansion valve 8, and a gas-side pipe 5 is connected to the other end of the indoor heat exchanger 6.

The outdoor unit 2 includes an outdoor heat exchanger 9 that performs heat exchange between refrigerant and outdoor air, an outdoor fan 10 that sends air to the outdoor heat exchanger 9, a four-way valve 11 that switches the flow direction of the refrigerant between a cooling operation and a heating operation, a reservoir 12 that accumulates liquid refrigerant, a compressor 13 that compresses gaseous refrigerant, and a receiver 14 that is provided on the refrigerant suction side of the compressor 13.

The outdoor unit 2 includes a 1 st refrigerant pipe 15 that connects the outdoor heat exchanger 9 and the four-way valve 11, a 2 nd refrigerant pipe 16 that connects the four-way valve 11 and the reservoir 12, and a 3 rd refrigerant pipe 17 that connects the compressor 13 and the four-way valve 11. The liquid-side pipe 4 is connected to one end of the outdoor heat exchanger 9, and the 1 st refrigerant pipe 15 is connected to the other end of the outdoor heat exchanger 9.

The outdoor unit 2 includes an intake pipe 18 for guiding the gaseous refrigerant from the upper portion of the reservoir 12 to the compressor 13, an oil return pipe 19 for guiding the refrigerating machine oil used for lubricating the compressor 13 from the bottom portion of the reservoir 12 to the intake pipe 18, an electromagnetic valve 20 provided in the oil return pipe 19, and a connection pipe 21 for connecting the reservoir 14 and the compressor 13.

In fig. 1, solid arrows indicate the flow of refrigerant in the outdoor unit 2 during the cooling operation and the heating operation. The dotted arrows indicate the flow of the refrigerant during the cooling operation. The arrows of the chain line indicate the flow of the refrigerant during the heating operation. The four-way valve 11 is used to switch the flow of refrigerant corresponding to the operating state.

The refrigerant flowing from the four-way valve 11 to the compressor 13 through the accumulator 12 always flows in the same direction regardless of the operation state. For example, the refrigerant having passed through the four-way valve 11 is guided to the reservoir 12 by the 2 nd refrigerant pipe 16. The refrigerant after passing through the reservoir 12 is guided to the receiver tank 14 by the suction pipe 18. The refrigerant having passed through the receiver tank 14 is guided to the compressor 13 by the connection pipe 21. The refrigerant having passed through the compressor 13 is guided to the four-way valve 11 by the 3 rd refrigerant pipe 17.

During the cooling operation, the refrigerant is discharged from the compressor 13 of the outdoor unit 2 in a high-temperature high-pressure gas state and flows into the outdoor heat exchanger 9. The refrigerant exchanges heat with outdoor air in the outdoor heat exchanger 9, condenses, turns into a liquid state, and flows into the liquid-side pipe 4 a. In the indoor unit 3, the liquid refrigerant flows from the liquid-side pipe 4 into the indoor heat exchanger 6 via the motor-operated expansion valve 8. The liquid refrigerant is evaporated and gasified by heat exchange with air in the room to be air-conditioned in the indoor heat exchanger 6.

Further, the gas-like refrigerant discharged from the indoor heat exchanger 6 of the indoor unit 3 flows into the gas-side pipe 5. The low-temperature low-pressure gas refrigerant is compressed by the compressor 13 of the outdoor unit 2 to become a high-temperature high-pressure gas, and is discharged from the compressor 13 again.

During the heating operation, the refrigerant is discharged from the compressor 13 of the outdoor unit 2 in a high-temperature high-pressure gas state and flows into the gas-side pipe 5. In the indoor unit 3, the gaseous refrigerant flows into the indoor heat exchanger 6. The gaseous refrigerant is condensed and liquefied by heat exchange with air in the room to be air-conditioned in the indoor heat exchanger 6.

The liquid refrigerant discharged from the indoor heat exchanger 6 of the indoor unit 3 flows into the liquid-side pipe 4 via the motor-operated expansion valve 8. In the outdoor unit 2, the liquid refrigerant flows into the outdoor heat exchanger 9 from the liquid-side pipe 4. The liquid refrigerant is evaporated and gasified by heat exchange with outdoor air in the outdoor heat exchanger 9. The low-temperature low-pressure gas refrigerant is compressed by the compressor 13 to become a high-temperature high-pressure gas, and is discharged from the compressor 13 again.

The liquid-like refrigerant is accumulated in the accumulator 12. For example, in the indoor heat exchanger 6 or the outdoor heat exchanger 9 functioning as an evaporator, the liquid refrigerant may not be completely evaporated. In this case, a refrigerant in a mixed state of a gaseous refrigerant and a liquid refrigerant may circulate. If a large amount of liquid refrigerant is sucked into the compressor 13, the compressor 13 may malfunction. Therefore, before the refrigerant is sucked into the compressor 13, the gas refrigerant and the liquid refrigerant are separated by the accumulator 12, and the liquid refrigerant is accumulated.

As shown in fig. 2, the reservoir 12 is a cylindrical box body having a central axis extending in the vertical direction. The reservoir 12 is installed in a state of being erected from the reference surface 23 using the leg portion 22. A 2 nd refrigerant pipe 16 and a suction pipe 18 are connected to an upper portion of the reservoir 12. When the refrigerant flows into the internal space of the reservoir 12 through the 2 nd refrigerant pipe 16, the gaseous refrigerant flows out through the suction pipe 18. On the other hand, the liquid-like refrigerant freely falls due to gravity, and is thus collected in the lower portion of the reservoir 12.

A prescribed amount of liquid-like refrigerant is accumulated in the accumulator 12. In designing the reservoir 12, the liquid level H1 for the maximum amount of reservoir is set. This maximum storage amount is provided with a margin, so that the liquid-like refrigerant is less likely to be stored to the liquid level H1 of the maximum storage amount of the reservoir 12 in operation.

The compressor 13 includes a compression unit 24 that compresses a gaseous refrigerant, a motor 25 that operates the compression unit 24, and a compressor housing 26 that houses the compression unit 24 and the motor 25. The compressor housing 26 is a cylindrical container having a central axis extending in the vertical direction. The compressor housing 26 is provided in a state of standing from the reference surface 23 by using the leg portions 27.