WO2018088127A1 - Accumulator - Google Patents

Abstract

Provided is an accumulator that suppresses bumping of a liquid stored in a liquid storage chamber, said accumulator comprising: an accumulator body 1 that has formed, in an interior thereof, a liquid storage chamber S for storing a liquid refrigerant L1 after separating the same from a refrigerant T that flows through a flow path 22 of an air conditioning device; an inflow opening 2 that is formed in the accumulator body 1, is connected to the flow path 22, and allows the refrigerant T flowing through the flow path 22 to flow into the accumulator body 1; a discharge opening 3 that is formed in the accumulator body 1, is connected to the flow path 22 on a downstream side of the inflow opening 2, and discharges the refrigerant T, from which the liquid refrigerant L1 has been separated, from within the accumulator body 1 to the flow path 22; and a release pipe 13 that has a pipe shape extending from the intake opening 2 to the vicinity of a lower section of the liquid storage chamber S, and releases at least a portion of the refrigerant T flowing in from the inflow opening 2 into a liquid L stored in the liquid storage chamber S.

Description

accumulator

The present invention relates to an accumulator, and more particularly to an accumulator in which a liquid reservoir chamber for separating and storing a liquid refrigerant from a refrigerant flowing through an air conditioner is formed.

Generally, in an air conditioner mounted on a vehicle or the like, an accumulator is disposed on the upstream side of the compressor with respect to the refrigerant flow direction. This accumulator separates the liquid refrigerant from the refrigerant flowing through the air conditioner, and can prevent the compressor from malfunctioning by suppressing the refrigerant containing the liquid refrigerant from flowing into the compressor. . Here, the accumulator is formed with a liquid storage chamber for storing the liquid refrigerant separated from the refrigerant, but sudden noise may be generated due to the liquid stored in the liquid storage chamber. There is a demand for suppressing the occurrence of this sudden sound.
Therefore, as a technique for suppressing the sudden generation of noise, for example, Patent Document 1 discloses a refrigerator for solving the generation of noise such as bubble noise and burst sound due to the backflow of refrigerant through the recovery hole when the compressor is stopped. An accumulator is disclosed. In this refrigerator accumulator, the lubricating oil is sprayed directly into the outflow pipe, so that the recovery efficiency of the lubricating oil is excellent, the refrigerant does not flow back to the inflow pipe when the compressor is stopped, and sudden noise such as bubble noise and burst sound. Generation of sound can be suppressed.

JP-A-8-29022

However, in the refrigerator accumulator of Patent Document 1, when the pressure in the liquid storage chamber is suddenly reduced, the liquid stored in the liquid storage chamber may suddenly boil and generate a loud sound. In particular, immediately after the air conditioner is activated, the liquid stored in the liquid storage chamber is in a state in which it is difficult for the liquid to flow, so that large bumping is likely to occur, and the volume of bumping is large.
The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an accumulator that suppresses bumping of liquid stored in a liquid storage chamber.

An accumulator according to the present invention includes an accumulator body in which a liquid reservoir chamber for separating and storing a liquid refrigerant from a refrigerant flowing through a flow path of an air conditioner is formed, and an accumulator body formed in the flow path. An inflow opening for connecting the refrigerant flowing through the flow passage into the accumulator body, and a refrigerant formed in the accumulator body and connected to the downstream side of the inflow opening in the flow path and separated from the liquid refrigerant A discharge opening for discharging the liquid from the accumulator body to the flow passage, and a tube shape extending from the inflow opening to the vicinity of the lower portion of the liquid reservoir, and at least part of the refrigerant flowing from the inflow opening is liquid. And a discharge pipe for discharging the liquid stored in the storage chamber.
Here, the discharge pipe can be formed with a discharge port at the tip portion for discharging the refrigerant flowing from the inflow opening with respect to the liquid stored in the liquid storage chamber.
In addition, the discharge pipe can be formed with a plurality of discharge holes in the peripheral wall portion near the tip portion for discharging the refrigerant flowing in from the inflow opening with respect to the liquid stored in the liquid storage chamber.
Further, the discharge tube is formed so as to extend in the vertical direction, and the tip portion can be directed downward.
In addition, the discharge tube can be bent in the vicinity of the tip so that the tip extends in the vertical direction and the tip is directed sideways.
The discharge tube can be bent in the vicinity of the tip so that the tip extends in the vertical direction and the tip is directed upward.
Further, the inflow opening and the discharge opening are disposed above the liquid reservoir, and the lubricating oil flows into the accumulator body together with the refrigerant from the inflow opening, and is formed to extend in the vertical direction. The upper end is connected to the discharge opening and the lower end is disposed in the liquid storage chamber. The lubricating oil is extracted from the liquid stored in the liquid storage chamber, and the liquid refrigerant is separated and discharged from the discharge opening. It is preferable to further have a discharge pipe.

According to the present invention, the discharge pipe having a tubular shape extending from the inflow opening to the vicinity of the lower portion of the liquid reservoir chamber has at least a part of the refrigerant flowing in from the inflow opening with respect to the liquid stored in the liquid reservoir chamber. Therefore, it is possible to provide an accumulator that suppresses bumping of the liquid stored in the liquid storage chamber.

It is sectional drawing which shows the structure of the accumulator which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the air conditioning apparatus for vehicles provided with the accumulator. It is sectional drawing which shows a mode that a refrigerant | coolant distribute | circulates the inside of an accumulator main body. FIG. 6 is a cross-sectional view showing a configuration of an accumulator according to a second embodiment. FIG. 6 is a diagram showing a discharge tube of a third embodiment. FIG. 10 is a view showing a discharge tube according to a modification of the third embodiment. It is a figure which shows the discharge tube of Embodiment 4. FIG. It is a figure which shows the discharge tube of Embodiment 5. FIG. It is sectional drawing which shows the structure of the accumulator which concerns on Embodiment 6. FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1
FIG. 1 shows the configuration of an accumulator according to Embodiment 1 of the present invention. This accumulator has an accumulator body 1, and an inflow opening 2 and a discharge opening 3 are formed in the upper part of the accumulator body 1. An inflow pipe 4 is connected to the inflow opening 2 and a discharge pipe 5 is connected to the discharge opening 3. Further, a collision plate 6 is disposed in the vicinity of the upper portion of the accumulator main body 1, and a discharge pipe 13 is disposed below the inflow opening 2.
The accumulator body 1 has a cylindrical shape that extends in the vertical direction and is sealed at the top and bottom, and separates the liquid L from the refrigerant flowing through the flow passage 22 of the air conditioner, specifically, the liquid refrigerant L1 and lubrication A liquid storage chamber S for separating and storing the oil L2 is formed inside.
The inflow opening 2 is formed in the upper portion of the accumulator body 1 and is connected to the flow passage 22 of the air conditioner. The refrigerant that flows through the flow passage 22 by connecting the flow passage 22 to the accumulator body 1 is used as lubricating oil. It is for making it flow in the accumulator main body 1 with L2.
The discharge opening 3 is formed in the upper part of the accumulator body 1 and connected to the downstream side of the inflow opening 2 in the flow passage 22, and communicates with the liquid passage L 22 in the accumulator body 1 through the flow passage 22. The discharged refrigerant is discharged together with the lubricating oil L2 from the accumulator body 1 to the flow passage 22.
The inflow pipe 4 has a circular pipe shape, and an upper end portion is connected to the inflow opening 2 and a lower end portion is disposed in the vicinity of the collision plate 6 with a gap.
The discharge pipe 5 is formed so as to extend in the vertical direction, and the upper end is connected to the discharge opening 3 and the lower end is disposed in the liquid reservoir S. Specifically, the discharge pipe 5 has a double pipe structure, and includes an outer pipe 7 and an inner pipe 8 arranged inside the outer pipe 7.
The outer tube 7 is formed so as to extend from the vicinity of the lower surface of the collision plate 6 to the vicinity of the bottom surface 9 of the accumulator body 1. The lower end portion of the outer tube 7 is sealed and the lubricating oil extraction portion 10 is disposed. The lubricating oil extraction unit 10 extracts the lubricating oil L2 from the liquid L stored in the liquid storage chamber S to the inside of the outer tube 7.
The inner tube 8 is formed such that the upper end is connected to the discharge opening 3 and the lower end extends through the collision plate 6 to the vicinity of the lower end of the outer tube 7. As a result, the gaseous refrigerant flowing into the inside from the upper end portion of the outer pipe 7 is discharged from the discharge opening 3 through the inner pipe 8 together with the lubricating oil L2 extracted by the lubricating oil extraction section 10.
The liquid storage chamber S indicates a space in which the liquid L is stored in the accumulator body 1, and specifically, a space formed between the bottom surface 9 in the accumulator body 1 and the upper end portion of the outer tube 7. Show.
The collision plate 6 is formed so as to spread in the horizontal direction so that the edge portion is positioned in the vicinity of the inner surface 11 of the accumulator body 1. A gap is formed between the edge of the collision plate 6 and the inner surface 11 of the accumulator main body 1 through which the refrigerant passes along with the liquid L. A recess 12 is formed in the lower part of the collision plate 6, and the upper end of the outer tube 7 is disposed in the recess 12.
The discharge pipe 13 has a tube shape extending linearly from the inflow opening 2 to the vicinity of the lower part of the liquid reservoir S, and a part of the refrigerant flowing from the inflow opening 2 is stored in the liquid reservoir S. The liquid L is discharged. For this reason, an inflow port 13a through which a part of the refrigerant flows into the discharge pipe 13 from the inflow opening 2 is formed at the base end portion of the discharge pipe 13, and a discharge port for discharging the refrigerant is formed at the distal end of the discharge pipe 13. An outlet 13b is formed. The discharge tube 13 is formed so as to extend in the vertical direction, and the tip end portion is directed directly downward, and the discharge port 13b is opened downward according to this.
The discharge pipe 13 is located in the inflow pipe 4 whose base end is connected to the inflow opening 2, and the distal end is located near the bottom surface 9 of the accumulator body 1 that forms the lower part of the liquid reservoir S. Are arranged as follows. For example, the distal end portion of the discharge tube 13 can be disposed so as to be separated from the bottom surface 9 of the accumulator body 1 by about 20 mm. The discharge pipe 13 is formed with a smaller diameter than the inflow opening 2 and the inflow pipe 4 so that a part of the refrigerant flowing from the inflow opening 2 flows into the discharge pipe 13.
Next, an example of a vehicle air conditioner equipped with an accumulator will be described.
As shown in FIG. 2, the vehicle air conditioner performs air conditioning in the passenger compartment of the electric vehicle, and includes a compressor 14, a radiator 15, an outdoor expansion valve 16, an outdoor heat exchanger 17, An indoor expansion valve 18, a heat absorber 19, an evaporation pressure adjusting valve 20, and an accumulator 21 are sequentially connected through a flow passage 22. Here, the outdoor heat exchanger 17 is connected to the indoor expansion valve 18 via the internal heat exchanger 23, and the heat absorber 19 is connected to the evaporation pressure adjusting valve 20 via the internal heat exchanger 23. Further, the flow path 22 is branched between the radiator 15 and the outdoor expansion valve 16, and the radiator 15 is also connected to the electromagnetic valve 24, and the electromagnetic valve 24 is connected to the indoor expansion valve via the internal heat exchanger 23. 18 is connected. Further, the vehicle air conditioner has a heat medium circulation circuit 25.
The compressor 14 compresses the refrigerant.
The radiator 15 is provided in an air flow path P of an HVAC (Heating, Ventilation and Air Conditioning) unit N through which air in the vehicle compartment flows, and dissipates heat from the refrigerant flowing through the inside to the air flowing through the air flow path P. Is.
The outdoor expansion valve 16 is composed of an electronic expansion valve that decompresses and expands the refrigerant during heating.
The outdoor heat exchanger 17 exchanges heat between the refrigerant and the air outside the passenger compartment so that it functions as a radiator during cooling and as an evaporator during heating. The outdoor heat exchanger 17 includes a receiver dryer unit 26 and a supercooling unit 27. The outdoor heat exchanger 17 is sequentially connected to the receiver dryer unit 26 and the supercooling unit 27 via the electromagnetic valve 28 during cooling, and the supercooling unit 27 passes through the check valve 29 and the internal heat exchanger 23. To the indoor expansion valve 18. The outdoor heat exchanger 17 is connected to the accumulator 21 via the electromagnetic valve 30 during heating.
The indoor expansion valve 18 is an electronic expansion valve that decompresses and expands the refrigerant.
The heat absorber 19 is provided in the air flow path P of the HVAC unit N and absorbs heat from the air flowing through the air flow path P during cooling and dehumidification.
The evaporation pressure adjusting valve 20 adjusts the evaporation pressure in the heat absorber 19.
As shown in FIG. 1, the accumulator 21 separates the liquid refrigerant L1 from the refrigerant flowing through the flow passage 22 and supplies the refrigerant to the compressor 14.
The internal heat exchanger 23 exchanges heat between the refrigerant flowing from the outdoor heat exchanger 17 toward the indoor expansion valve 18 and the refrigerant flowing from the heat absorber 19 toward the evaporation pressure adjusting valve 20. .
The electromagnetic valve 24 is opened at the time of dehumidification, and the radiator 15 is connected to the indoor expansion valve 18 via the internal heat exchanger 23 by opening the electromagnetic valve 24.
The heat medium circulation circuit 25 is formed by sequentially connecting a circulation pump 31, a heat medium heating electric heater 32, and a heat medium-air heat exchanger 33 in an annular shape. The circulation pump 31 circulates the heat medium. The heat medium heating electric heater 32 heats the heat medium. The heat medium-air heat exchanger 33 is provided in the air flow path P of the HVAC unit N on the upstream side in the air flow direction of the radiator 15 and radiates heat from the heat medium to the air flowing through the air flow path P. It is.
Next, the operation of the vehicle air conditioner will be described.
First, since the refrigerant does not flow into the accumulator when the vehicle air conditioner is stopped, as shown in FIG. 1, the liquid L stored in the liquid storage chamber S in the accumulator body 1 does not flow and is static. It has been placed. For this reason, the liquid L is separated into the liquid refrigerant L1 and the lubricating oil L2 with a difference in specific gravity, and the lubricating oil L2 is positioned in the upper layer of the liquid refrigerant L1.
Subsequently, the vehicle air conditioner shown in FIG. 2 is activated to drive the components such as the compressor 14. Here, as the compressor 14 starts driving, the pressure on the side of sucking the refrigerant in the compressor 14 rapidly decreases, and the pressure in the accumulator 21 connected to the suction side of the compressor 14 also rapidly increases. To drop.
At this time, since the liquid L stored in the liquid storage chamber S of the accumulator body 1 is not flowing, there is a risk that the liquid L in the liquid storage chamber S may bump due to a sudden drop in pressure in the accumulator body 1. . In particular, in the state where the lubricating oil L2 is located in the upper layer of the liquid refrigerant L1, the flow of the liquid refrigerant L1 is greatly suppressed by the lubricating oil L2, and thus the liquid refrigerant L1 may be largely bumped.
Therefore, in the present invention, the discharge pipe 13 extending from the inflow opening 2 to the vicinity of the lower portion of the liquid reservoir S is disposed. In response to the activation of the vehicle air conditioner, the refrigerant flows into the accumulator main body 1 from the inflow passage 22 through the inflow opening 2, and a part of this refrigerant also enters the discharge pipe 13 through the inflow port 13 a. Inflow. The refrigerant flowing into the discharge pipe 13 flows downward through the discharge pipe 13 and is discharged from the discharge port 13b into the liquid L stored in the liquid storage chamber S of the accumulator body 1. Thus, since the liquid L stored in the liquid storage chamber S flows when the refrigerant is discharged from the discharge port 13b, bumping of the liquid L can be suppressed.
Here, since the discharge pipe 13 is arranged so that the tip end portion is located in the vicinity of the bottom surface 9 of the accumulator main body 1, the liquid L stored in the liquid storage chamber S by the refrigerant discharged from the discharge port 13b is surely obtained. It can be made to flow, and the bumping of the liquid L can be suppressed reliably.
Further, the discharge tube 13 is arranged so that the discharge port 13b faces downward. For this reason, the liquid L stored in the liquid storage chamber S can be caused to flow from the lower side by the refrigerant discharged from the discharge port 13b, and the bumping of the liquid L can be reliably suppressed.
The discharge pipe 13 is formed with a smaller diameter than the inflow opening 2 and the inflow pipe 4, and allows a part of the refrigerant flowing in from the inflow opening 2 to flow into the discharge pipe 13. Thereby, the discharge amount of the refrigerant discharged from the discharge port 13b of the discharge pipe 13 is adjusted, and it is possible to suppress the liquid L in the liquid storage chamber S from being greatly scattered upward due to the discharge of the refrigerant. The discharge tube 13 can be formed with a diameter of about 6 mm, for example.
The accumulator 21 has an inflow opening 2 and a discharge opening 3 disposed at the top of the accumulator body 1. For this reason, it is difficult for the refrigerant flowing in from the inflow opening 2 to reach the liquid L stored in the liquid storage chamber S, and it is difficult to cause the liquid L in the liquid storage chamber S to flow immediately after the vehicle air conditioner is activated. However, when the refrigerant is discharged from the discharge pipe 13, the liquid L in the liquid storage chamber S flows greatly, and the bumping of the liquid L can be reliably suppressed.
Further, since the lubricating oil L2 sequentially flows into the accumulator body 1 together with the refrigerant from the inflow opening 2, the lubricating oil L2 is placed in the upper layer of the liquid refrigerant L1 in the liquid reservoir S immediately after the vehicle air conditioner is started. It exists and tends to suppress the flow of the liquid refrigerant L1, but by arranging the discharge pipe 13, the bumping of the liquid refrigerant L1 can be reliably suppressed.
In this manner, the vehicle air conditioner is started in a state where the bumping of the liquid L in the accumulator 21 is suppressed. For example, when the heating operation of the vehicle air conditioner is started by the operator, the electromagnetic valve 30 is opened and the electromagnetic valve 24 is closed, and a high-temperature and high-pressure refrigerant is discharged from the compressor 14 in a gaseous state. The The refrigerant discharged from the compressor 14 flows into the radiator 15 and radiates heat to the air flowing through the air flow passage P of the HVAC unit N in the radiator 15. Thereby, the refrigerant is deprived of heat, cooled and liquefied, flows from the radiator 15 to the outdoor expansion valve 16, is decompressed by the outdoor expansion valve 16, and then flows into the outdoor heat exchanger 17. The refrigerant flowing into the outdoor heat exchanger 17 absorbs heat from the outside air flowing toward the outdoor heat exchanger 17 and flows into the accumulator 21 through the electromagnetic valve 30.
In the accumulator 21, as shown in FIG. 3, the refrigerant T flows together with the liquid L containing the liquid refrigerant L1 and the lubricating oil L2 from the inflow opening 2 formed in the upper part of the accumulator body 1. A part of the refrigerant T flowing in from the inflow opening 2 flows into the discharge pipe 13 and is discharged into the liquid L stored in the liquid storage chamber S. On the other hand, the refrigerant T that has flowed down through the inflow pipe 4 without flowing into the discharge pipe 13 collides with the collision plate 6 disposed just below the inflow pipe 4 and moves sideways along the surface of the collision plate 6. After moving, it flows downward through a gap formed between the collision plate 6 and the inner surface 11 of the accumulator body 1. And the gaseous refrigerant | coolant T is guide | induced to the upper end part of the outer tube | pipe 7 arrange | positioned in the vicinity of the collision board 6, and the liquid L containing the liquid refrigerant | coolant L1 and the lubricating oil L2 is along the inner surface 11 of the accumulator main body 1. FIG. It flows downward and is supplied to the liquid storage chamber S. In this way, the liquid refrigerant L1 can be easily separated from the refrigerant T.
At this time, the refrigerant T is discharged from the discharge pipe 13 into the liquid L stored in the liquid storage chamber S, and the liquid L is sequentially supplied to the liquid storage chamber S from above, so that the liquid L is stored in the liquid storage chamber S. The liquid L flows and the liquid refrigerant L1 and the lubricating oil L2 separated into two layers when the vehicle air conditioner is started are mixed with each other. In this way, the liquid L flows so that the liquid refrigerant L1 and the lubricating oil L2 are mixed with each other, so that the bumping of the liquid L stored in the liquid storage chamber S can be reliably suppressed. Then, the lubricating oil L <b> 2 that has moved to the vicinity of the bottom surface 9 of the accumulator body 1 flows into the outer pipe 7 through the lubricating oil extraction unit 10.
On the other hand, the gaseous refrigerant T guided to the upper end portion of the outer tube 7 flows into the outer tube 7 from the opening formed at the upper end portion, and flows downward in the outer tube 7. And the gaseous refrigerant | coolant T distribute | circulates the inside of the inner pipe | tube 8 upward with the lubricating oil L2 which flowed in in the outer pipe | tube 7, and is discharged | emitted from the discharge opening part 3 to the flow path 22. FIG.
Thereby, since the refrigerant T separated from the liquid refrigerant L1 in the accumulator 21 sequentially flows into the compressor 14, the compression efficiency of the refrigerant T in the compressor 14 can be improved. Furthermore, since the lubricating oil L2 discharged together with the refrigerant T is supplied to the compressor 14 and the like, the compressor 14 and the like can be driven to lubricate.
In this way, the refrigerant T circulates through the vehicle air conditioner, whereby the air flowing through the air flow path P of the HVAC unit N is heated in the radiator 15 and the heat medium-air heat exchanger 33, and the heating is performed. The heated air is blown out into the vehicle interior, thereby heating the vehicle interior.
According to the present embodiment, the discharge pipe 13 having a tubular shape extending from the inflow opening 2 to the vicinity of the lower portion of the liquid reservoir S stores a part of the refrigerant flowing in from the inflow opening 2 in the liquid reservoir S. Since the liquid L is discharged, the bumping of the liquid L stored in the liquid storage chamber S can be suppressed.
In particular, after heating, a large amount of liquid L tends to be stored in the liquid storage chamber S of the accumulator body 1, and the liquid L tends to boil easily. Can be greatly suppressed.
Embodiment 2
In the first embodiment, the discharge pipe 13 is formed with a smaller diameter than the inflow opening 2 and the inflow pipe 4 so that a part of the refrigerant T flowing in from the inflow opening 2 flows into the inside. All of the refrigerant T flowing in from the opening 2 for use can also flow into the inside.
For example, as shown in FIG. 4, in the first embodiment, the discharge pipe 34 can be disposed in place of the discharge pipe 13 and the collision plate 6 can be removed. The discharge pipe 34 has a tube shape that linearly extends from the inflow opening 2 to the liquid reservoir S, and has an inflow port 34a at the base end and a discharge port 34b at the tip.
Here, the discharge pipe 34 is formed with substantially the same diameter as the inflow opening 2 and the inflow pipe 4 so that the outer peripheral surface is in close contact with the inner peripheral surface of the inflow pipe 4. As a result, the discharge pipe 34 causes all of the refrigerant T flowing in from the inflow opening 2 to flow into the inside from the inflow port 34a, and discharges the liquid L stored in the liquid storage chamber S from the discharge port 34b. be able to.
According to the present embodiment, since the discharge pipe 34 discharges all of the refrigerant T flowing in from the inflow opening 2 to the liquid L stored in the liquid storage chamber S, the liquid L in the liquid storage chamber S is discharged. By promptly flowing, the bumping of the liquid L can be reliably suppressed.
Embodiment 3
In the first and second embodiments, the discharge pipe is formed so as to extend in the vertical direction, and the tip portion is directed downward, but is formed so as to extend from the inflow opening 2 to the vicinity of the lower portion of the liquid reservoir S. The shape is not limited to the shape.
For example, instead of the discharge tube 13 of the first embodiment, a discharge tube 35 shown in FIG. 5 can be arranged. The discharge pipe 35 has an inflow port 35a at the base end and a discharge port 35b at the tip. Here, the discharge pipe 35 extends in the vertical direction, and the vicinity of the distal end portion is bent sideways so that the distal end portion faces the horizontal direction. For this reason, the discharge port 35b formed at the tip is opened in the horizontal direction. The discharge pipe 35 can cause the liquid L stored in the liquid storage chamber S to flow over a wide range by discharging the refrigerant T from the discharge opening 35b opened in the horizontal direction, and reliably suppress the bumping of the liquid L. can do.
Moreover, it can replace with the discharge pipe 13 of Embodiment 1, and the discharge pipe 36 shown to Fig.6 (a) can also be arrange | positioned. The discharge pipe 36 has an inlet 36a at the base end and a discharge port 36b at the tip. Here, the discharge tube 36 is bent upward in the vicinity of the tip so that the tip extends in the vertical direction and the tip is directed obliquely upward. For this reason, the discharge port 36b formed at the tip is opened obliquely upward.
Moreover, it can replace with the discharge tube 13 of Embodiment 1, and the discharge tube 37 shown in FIG.6 (b) can also be arrange | positioned. The discharge pipe 37 has an inflow port 37a at the base end and a discharge port 37b at the tip. Here, the discharge tube 37 extends in the vertical direction and is curved upward in the vicinity of the distal end portion so that the distal end portion faces directly upward. For this reason, the discharge port 37b formed at the tip is opened directly above.
As described above, the discharge pipes 36 and 37 allow the liquid L stored in the liquid storage chamber S to flow upward from the lower side by discharging the refrigerant T from the discharge ports 35b and 36b opened upward. And the bumping of the liquid L can be reliably suppressed.
According to the present embodiment, the direction of the refrigerant discharged from the discharge pipe can be changed according to the shape of the liquid reservoir chamber S of the accumulator body 1 and the liquid L stored in the liquid reservoir chamber S can be efficiently used. The bumps of the liquid L can be reliably suppressed.
Embodiment 4
In the first to third embodiments, the discharge pipe discharges the refrigerant to the liquid L stored in the liquid storage chamber S from the discharge port formed at the tip, but the liquid L stored in the liquid storage chamber S. However, the present invention is not limited to the one that releases the refrigerant from the discharge port.
For example, instead of the discharge tube 13 of the first embodiment, a discharge tube 38 shown in FIG. 7A can be arranged. The discharge pipe 38 has an inflow port 38a formed at the base end portion and a tip end portion sealed, and a plurality of discharge holes 38b formed in a peripheral wall portion near the tip end portion. The plurality of discharge holes 38b can be formed with a diameter of about 1 mm, for example. Further, for example, about ten release holes 38b can be formed in a range of about 30 mm from the distal end portion of the discharge tube 38 toward the base end portion. Thereby, the discharge pipe 38 can discharge the refrigerant T flowing in from the inflow port 38a to the liquid L stored in the liquid storage chamber S from the plurality of discharge holes 38b.
Moreover, the discharge tube 39 shown in FIG. 7B can be arranged. The discharge tube 39 extends in the vertical direction and is bent sideways in the vicinity of the tip so that the tip is oriented in the horizontal direction. In addition, the discharge pipe 39 has an inlet 39a formed at the base end portion and a distal end portion sealed, and a plurality of discharge holes 39b formed in a peripheral wall portion near the distal end portion.
According to this embodiment, since the refrigerant T is discharged in various directions from a plurality of discharge holes formed in the vicinity of the tip of the discharge pipe, the liquid L stored in the liquid storage chamber S is caused to flow as a whole. And boiling of the liquid L can be reliably suppressed.
The discharge pipes 38 and 39 can further form a discharge port without sealing the tip.
Embodiment 5
In Embodiments 1 to 4, the discharge tube may be formed so as to have a plurality of distal ends with respect to one base end.
For example, as shown in FIG. 8, the discharge tube 40 can be formed to branch into a plurality of distal end portions with respect to one base end portion. The distal ends of the discharge pipes 40 are arranged at equal intervals in the circumferential direction and are formed to expand radially in the horizontal direction. In addition, the discharge pipe 40 has an inflow port 40a at the base end portion and a discharge port 40b at each of a plurality of tip ends. For this reason, the plurality of discharge ports 40b are respectively opened in the horizontal direction.
According to the present embodiment, since the refrigerant T is discharged in various directions from the plurality of discharge ports 40b of the discharge pipe 40, the liquid L stored in the liquid storage chamber S can be entirely flowed, and the liquid L boiling can be reliably suppressed.
Embodiment 6
In the first to fifth embodiments, the refrigerant L is discharged from the discharge pipe, so that the liquid L stored in the liquid storage chamber S is scattered upward, and the liquid L is discharged from the upper end of the outer pipe 7 into the outer pipe 7. In order to prevent inflow, it is preferable to arrange an inflow prevention plate that prevents the inflow of the liquid L below the outer tube 7.
For example, as shown in FIG. 9, the inflow prevention plate 41 can be disposed at a position below the upper end portion of the outer tube 7 in the second embodiment. The inflow prevention plate 41 is formed so as to spread in the horizontal direction so that the edge portion is positioned in the vicinity of the inner surface 11 of the accumulator body 1.
According to the present embodiment, even when the liquid L stored in the liquid storage chamber S greatly rises due to the discharge of the refrigerant T from the discharge pipe 34, the inflow prevention plate 41 extends from the upper end of the outer pipe 7 to the outer pipe 7. Since the liquid L is prevented from flowing into the liquid L, the liquid L can be prevented from being discharged from the discharge opening 3.

1 accumulator body, 2 inflow opening, 3 discharge opening, 4 inflow pipe, 5 discharge pipe, 6 collision plate, 7 outer pipe, 8 inner pipe, 9 bottom surface of accumulator body, 10 lubricant oil extraction section, 11 accumulator Inner surface of main body, 12 recess, 13, 34, 35, 36, 37, 38, 39, 40 discharge pipe, 13a, 34a, 35a, 36a, 37a, 38a, 39a, 40a inlet, 13b, 34b, 35b, 36b, 37b, 40b outlet, 38b, 39b outlet, 14 compressor, 15 radiator, 16 outdoor expansion valve, 17 outdoor heat exchanger, 18 indoor expansion valve, 19 heat absorber, 20 evaporating pressure adjustment valve, 21 accumulator , 22 flow path, 23 internal heat exchanger, 24 solenoid valve, 25 heat medium circulation circuit, 26 receiver dryer section, 27 Cooling unit, 28 solenoid valve, 29 check valve, 30 solenoid valve, 31 circulation pump, 32 heat medium heating electric heater, 33 heat medium-air heat exchanger, 41 inflow prevention plate, S liquid reservoir S, L liquid, L1 liquid refrigerant, L2 lubricating oil, N HVAC unit, P air flow passage, T refrigerant.

Claims (7)

An accumulator body in which a liquid storage chamber for separating and storing the liquid refrigerant from the refrigerant flowing through the flow path of the air conditioner is formed;
An inflow opening that is formed in the accumulator body and is connected to the flow path and allows the refrigerant flowing through the flow path to flow into the accumulator body;
A discharge opening formed in the accumulator body and connected to a downstream side of the inflow opening in the flow path, and discharges the refrigerant separated from the liquid refrigerant from the accumulator body to the flow path;
It has a tube shape extending from the inflow opening to the vicinity of the lower part of the liquid reservoir, and discharges at least a part of the refrigerant flowing in from the inflow opening to the liquid stored in the liquid reservoir. An accumulator comprising a discharge tube. 2. The accumulator according to claim 1, wherein the discharge pipe has a discharge port formed at a distal end portion for discharging a refrigerant flowing from the inflow opening with respect to the liquid stored in the liquid storage chamber. 3. The discharge pipe has a plurality of discharge holes formed in a peripheral wall portion in the vicinity of a tip portion for discharging a refrigerant flowing from the inflow opening to the liquid stored in the liquid storage chamber. The accumulator described in. The accumulator according to any one of claims 1 to 3, wherein the discharge tube is formed so as to extend in a vertical direction, and a tip end portion thereof is directed downward. The accumulator according to any one of claims 1 to 3, wherein the discharge tube extends in the vertical direction and is bent in the vicinity of the tip so that the tip is directed to the side. The accumulator according to any one of claims 1 to 3, wherein the discharge tube extends in the vertical direction and is bent near the tip so that the tip is directed upward. The inflow opening and the discharge opening are disposed above the liquid reservoir, and lubricating oil flows into the accumulator body together with the refrigerant from the inflow opening,
The lubricating oil is formed so as to extend in the vertical direction, the upper end is connected to the discharge opening and the lower end is disposed in the liquid storage chamber, and the lubricating oil is extracted from the liquid stored in the liquid storage chamber. 7. The accumulator according to claim 1, further comprising a discharge pipe that discharges the lubricating oil from the discharge opening together with the refrigerant separated from the liquid refrigerant.

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