KR20230017284A - liquid storage device - Google Patents

Abstract

This application relates to the field of refrigeration technology, and more particularly to liquid storage devices. The liquid storage device provided in the present application includes a housing assembly, an air inlet pipe and an air outlet pipe. The housing assembly has an internal cavity. One ends of the air inlet pipe and the air outlet pipe are respectively located within the inner cavity, and the other ends respectively extend out of the housing assembly. The liquid storage device further includes a protective cover. A protective cover is installed to cover the first exit point and/or the second entry point. A through hole is opened in a side surface of the protective cover to communicate the inner cavity with an air inlet pipe and/or an air outlet pipe. An oil return hole is opened in the air discharge pipe, and a filter member is installed at a hole opening point of the oil return hole. Compared with the prior art, the advantages of the present application are as follows. That is, by installing the protective cover at the first outlet and/or the second inlet to cover the problem that liquid droplets in the refrigerant flow into the compressor and cause liquid strike damage. In addition, the oil return hole and the filter member installed in the air discharge pipe prevent impurities from entering the compressor and jamming the compressor.

Description

liquid storage device

This application claims priority to a patent application filed with the State Intellectual Property Office of China on June 30, 2020, the application number of which is 202021244993.4 and the title of the invention is "liquid storage device".

This application relates to the field of refrigeration technology, and more particularly to liquid storage devices.

A liquid storage device is one of the important components of a refrigeration system and is usually installed between an evaporator and a compressor. It functions as refrigerant storage, gas-liquid separation, and filtering of impurities.

In the conventional liquid storage device, the gas-liquid mixed refrigerant flows into the air discharge pipe immediately after the gas-liquid mixed refrigerant flows into the air inlet pipe. Therefore, liquid droplets of some liquid refrigerant flow into the compressor from the air discharge pipe, causing liquid impact damage to the compressor.

In view of this point and in order to solve the above technical problem, the present application provides a liquid storage device. The technical solution to this is as follows.

The liquid storage device provided in the present application includes a housing assembly, an air inlet pipe and an air outlet pipe. The housing assembly has an inner cavity. One ends of the air inlet pipe and the air outlet pipe are respectively located within the inner cavity, and the other ends extend to the outside of the housing assembly, respectively. The air inlet has a first inlet located outside the housing assembly and a first outlet located inside the housing assembly. The liquid storage device further includes a protective cover. The protective cover is installed to cover the first outlet point and/or the second inlet point. A through hole is opened on a side surface of the protective cover to communicate the inner cavity and the air inlet pipe and/or the air outlet pipe. An oil return hole is opened in the air discharge pipe. A filter member is installed at a hole opening point of the oil return hole.

Through this installation, when the gas-liquid mixed refrigerant flows into the air inlet pipe, it is possible to prevent it from falling directly into the air outlet pipe, and to prevent liquid droplets in the refrigerant from flowing into the compressor, thereby preventing the compressor from being damaged by liquid strike. there is. The filter member is used to filter impurities in the refrigerant, preventing the impurities from flowing into the compressor from the oil return hole and causing jamming problems in the compressor.

In one embodiment, the protective cover is installed to cover the first exit point. The inner bottom wall of the protective cover is arcuate.

Through this installation, the arc-shaped bottom wall can guide the flow of the refrigerant. After the gas-liquid mixed refrigerant strikes the bottom wall of the air inlet pipe, the pressure loss of the refrigerant is reduced, thereby improving the air inflow effect.

In one embodiment, the protective cover is installed to cover the first exit point. The cross section of the through hole is elliptical.

Through this installation, it is possible to increase the air inlet flow rate by increasing the cross-sectional area of the through hole.

In one embodiment, the protective cover is installed to cover the first exit point. An included angle α of an axial line of the through hole and an axial line of a portion of the air discharge pipe located in the inner cavity is 90° or more.

Through this installation, the hole opening of the through hole is located away from the air discharge pipe, thereby reducing the possibility of liquid refrigerant flowing into the air discharge pipe.

In one embodiment, a flow area of the through hole is greater than a flow area of the first outlet and/or the second inlet.

Through this installation, the performance of the product can be improved by strengthening the air intake efficiency and reducing noise. In addition, since the distribution area is too small, the dynamic pressure of the refrigerant flowing into the air discharge pipe increases and the flow rate of the refrigerant increases, preventing the refrigerant from colliding with the inner wall of the air discharge pipe and generating noise.

In one embodiment, the protective cover is installed to cover the second inlet point, and along an axial direction of the through hole, in a direction away from the air discharge pipe, a cross-sectional area of the through hole gradually increases.

Through this installation, it is possible to prevent the liquid refrigerant from falling directly into the air discharge pipe when it flows in from the air inlet pipe, and to prevent liquid impact damage to the compressor due to liquid droplets in the refrigerant flowing into the compressor. In addition, the cross-sectional area of the through hole gradually increases to make the inner wall of the through hole tapered or arcuate. This acts to guide the flow of the refrigerant, reducing the pressure loss of the refrigerant.

In one embodiment, the protective cover is installed to cover the second entry point. An included angle β of the axis of the through hole and the axis of the air inlet pipe is 90° or less.

Through this installation, the hole opening of the through hole is set away from the air inlet pipe. When the refrigerant flows out of the protective cover, the possibility of liquid refrigerant flowing into the air discharge pipe is reduced.

In one embodiment, the through hole is plural. The plurality of through holes are uniformly distributed around the circumference of the protective cover.

In one embodiment, the distance range between the cross section of the first outlet and the cross section of the second inlet ranges from 6 mm to 10 mm.

Through this installation, the possibility of liquid refrigerant flowing into the air discharge pipe can be further reduced. If the distance is too short, the flow of gaseous refrigerant into the air discharge pipe may be affected, and if the distance is too far, the possibility of liquid refrigerant flowing into the air discharge pipe increases.

In one embodiment, the air exhaust pipe includes a straight pipe and a bend pipe connected to each other. A straight pipe is located in the inner cavity. The end of the bend pipe extending from the straight pipe to the outside of the housing assembly. The second inlet is opened at one end far from the bend of the straight pipe.

Compared with the related art, the liquid storage device provided in the present application installs the protective cover at the first outlet point and/or the second inlet point, and opens a through hole in the side of the protective cover. Through this, when the gas-liquid mixed refrigerant is introduced from the air inlet pipe, it is prevented from directly falling into the air discharge pipe, and liquid droplets in the refrigerant are prevented from flowing into the compressor and causing liquid strike damage to the compressor. In addition, an oil return hole is opened at a point close to the second outlet of the air discharge pipe, and a filter member is installed at a hole opening point of the oil return hole. Through this, impurities are prevented from flowing into the compressor from the oil return hole, thereby preventing a jamming problem in the compressor.

1 is a structural diagram of a liquid storage device according to Embodiment 1 of the present application.
FIG. 2 is a partially enlarged structural view of point A in FIG. 1 .
FIG. 3 is a partially enlarged structural view of point B in FIG. 1 .
4 is a structural diagram of a liquid storage device according to Example 2 of the present application.
5 is a partially enlarged structural view of point C in FIG. 4 .
6 is a structural diagram of a liquid storage device according to Example 3 of the present application.
The meaning of each symbol in the drawing is as follows.
Reference numeral 100 is a liquid storage device, 10 is a housing assembly, 11 is a first cover body, 12 is a second cylinder body, 13 is a third cover body, 20 is an inner cavity, 30 is an air inlet pipe, 31 is a first inlet, 32 is a first outlet, 40 is an air discharge pipe, 401 is a straight pipe, 402 is a bend pipe, 41 is a second inlet, 42 is a second outlet, 50 is a protective cover, 51 is a through hole, 60 is an oil return hole, 61 is a filter member. .

The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. The described embodiments are only some rather than all embodiments of the present invention. All other embodiments obtained by a person skilled in the art without creative work on the basis of the embodiments of the present invention shall fall within the protection scope of the present invention.

Note that when a component is described as being “mounted” on another component, it may be directly mounted on the other component or there may be an intervening component. When a component is described as being “installed” on another component, it may be directly installed on the other component or intervening components may exist simultaneously. When one component is described as being "fixed" to another component, it may be directly fixed to the other component or intervening components may exist simultaneously.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms used herein in the specification of the present application are for describing specific embodiments, and are not intended to limit the present invention. As used herein, the term “or/and” includes any and all combinations of one or more of the related listed items.

1 to 6 , in the liquid storage device 100 provided by the present application, the liquid storage device 100 is mainly used in a refrigeration system. It is usually installed between the air conditioning evaporator and the compressor. When the load of the refrigeration system is relatively small, the refrigerant may return to the liquid storage device 100 to stabilize the circulating amount of the refrigerant in the system so that the refrigeration system is in a normal operating state. When a breakdown occurs in a specific part of the refrigeration system and requires disassembly and repair, the refrigerant in the refrigeration system is collected in the liquid storage device 100 through a certain operation to prevent a large amount of refrigerant from flowing to the outside and being wasted.

As shown in FIGS. 1 to 3 , the liquid storage device 100 includes a housing assembly 10 , an air inlet pipe 30 and an air outlet pipe 40 . One ends of the air inlet pipe 30 and the air outlet pipe 40 are respectively located within the inner cavity 20, and the other ends extend to the outside of the housing assembly 10, respectively. The air inlet pipe 30 has a first inlet 31 located outside the housing assembly 10 and a first outlet 32 located inside the housing assembly 10 . The air discharge pipe 40 has a second inlet 41 located in the inner cavity 20 and a second outlet 42 located outside the housing assembly 10 .

The housing assembly 10 includes a first cover body 11 , a second cylinder body 12 and a third cover body 13 . Both ends of the second cylinder body 12 connect the first cover body 11 and the third cover body 13, respectively. The second cylinder body 12 is a hollow cylinder body. The second cylinder body 12 forms an inner cavity 20 with the first cover body 11 and the third cover body 13 . The first cover body 11 is fixedly connected to the air inlet pipe 30 . The air discharge pipe 40 is fixedly connected to the third cover body 13 .

In this embodiment, the air inlet pipe 30 and the air outlet pipe 40 are made of copper so that users can easily weld them to other pipelines in the refrigeration system. In other embodiments, the air inlet pipe 30 and the air outlet pipe 40 may be made of stainless steel or other materials.

The air discharge pipe 40 includes a straight pipe 401 and a bend pipe 402 connected to each other. A straight pipe 401 is located in the inner cavity 20 . One end of the bend pipe 402 is connected to the straight pipe 401, and the other end extends to the outside of the housing assembly 10. The second outlet 42 is opened on the bend pipe 402, and the second inlet 41 is opened at one end far from the bend pipe 402 of the straight pipe 401. The bend pipe 402 and the third cover body 13 are connected to each other at a point close to the second outlet 42 .

Preferably, the air inlet pipe 30 and the first cover body 11, the air discharge pipe 40 and the third cover body 13, and the third cover body 13 and the bend pipe 402 are welded together. can be fixed This improves the overall joint sealability and makes the performance reliable. The outer surface of the housing assembly 10 is coated with a special powder to pass the severe level of neutral salt spray test.

[Example 1]

Referring to FIGS. 1 and 3 , the liquid storage device 100 includes a protective cover 50 . A protective cover 50 is installed to cover the first outlet 32 point. The bottom of the protective cover 50 is sealed. That is, the bottom of the protective cover 50 is not opened. A through hole 51 is opened on the side of the protective cover 50 to communicate the inner cavity 20 and the air inlet pipe 30 . An oil return hole 60 is opened on the straight pipe 401. The oil return hole 60 is installed close to the bend pipe 402. That is, it is installed close to the bottom of the liquid storage device 100. A filter member 61 is installed at the hole opening point of the oil return hole 60 . The filter member 61 is used to filter impurities in the lubricating oil to prevent the impurities from entering the compressor through the oil return hole 60 and causing jamming problems in the compressor.

Through this installation, when the gas-liquid mixed refrigerant flows in from the air inlet pipe 30, it is prevented from falling directly into the air discharge pipe 40, and liquids in the refrigerant flow into the compressor to prevent the compressor from being damaged by liquid strike. I can understand. In addition, due to long-term operation of the compressor, certain lube base oil may be discharged together with the vaporized refrigerant therein, and introduced into the internal cavity 20 of the liquid storage device 100 through a pipeline. In the oil return hole 60 installed close to the second outlet 42 of the straight pipe 401, the lubricating oil precipitated at the bottom of the liquid storage device 100 is returned to the air of the liquid storage device 100 through the suction force of the compressor. After returning to the discharge pipe 40 and mixing with the refrigerant, it is made to flow into the compressor again. Thus, it represents the action of lubrication protection for the compressor. The filter member 61 is installed at the oil return hole 60 to reduce the risk of impurities in the lubricating oil blocking the oil return hole 60 and the impact of impurities entering the compressor on the performance and service life of the compressor.

Specifically, in this embodiment, four through holes 51 are opened. Of course, in another embodiment, the number of through holes 51 may be 5, 6, 7 or more. Here, the number of through holes 51 is not limited.

The range of the distance between the end face of the first outlet 32 and the end face of the second inlet 41 is 6 mm to 10 mm. Through this, the possibility of liquid refrigerant flowing into the air discharge pipe 40 can be further reduced. If the distance is too close, the flow of the gaseous refrigerant into the air discharge pipe 40 may be affected. Since liquid refrigerant may exist at the bottom of the liquid storage device 100 , if the distance is too far, the possibility of liquid refrigerant flowing into the air discharge pipe 40 may increase.

The inner bottom wall of the protective cover 50 has an arc shape. The arcuate wall surface acts as a flow guide for the refrigerant, so that pressure damage after the gas-liquid mixed refrigerant hits the bottom wall of the air inlet pipe 30 can be reduced and the air inflow effect can be improved.

In addition, both ends of the circular arc of the inner bottom wall of the protective cover 50 extend from the bottom of the protective cover 50 to the hole openings of the through holes 51 on both sides of the protective cover 50, further reducing the pressure loss during the refrigerant flow process. let it

The surface of the through hole 51 is arcuate. This increases the cross-sectional area of the through hole 51 to improve the air inlet flow rate.

Preferably, an included angle a of the axis of the through hole 51 and the axis of the straight pipe 401 is 90° or more. That is, the through hole 51 is installed obliquely to the axis of the straight pipe 401, making the hole opening of the through hole 51 move away from the straight pipe 401. Accordingly, the possibility of liquid refrigerant flowing into the air discharge pipe 40 may be reduced.

A plurality of through holes 51 are opened on the side of the protective cover 50 . The plurality of through holes 51 are uniformly distributed around the protective cover 50 . Also, the circulation area of the through hole 51 is larger than that of the first outlet 32 . Such installation can enhance the performance of the product by enhancing the air intake efficiency and reducing the noise. In addition, since the circulation area is too small, the dynamic pressure of the refrigerant increases and the flow rate of the refrigerant increases, so that the refrigerant collides with the inner wall of the air discharge pipe 40 and noise is prevented.

Further, along the axial direction away from the air inlet pipe 30 of the through hole 51, the cross-sectional area of the through hole 51 gradually increases. Through this, it is possible to prevent the liquid refrigerant from falling directly into the air discharge pipe when introduced from the air inlet pipe, and to prevent liquid impact damage to the compressor due to liquid droplets in the refrigerant flowing into the compressor. In addition, the cross-sectional area of the through hole 51 gradually increases to make the inner wall of the through hole 51 tapered or arcuate. This acts to guide the flow of the refrigerant, reducing the pressure loss of the refrigerant.

In this embodiment, the filter element 61 is a filter cloth. The filter cloth has a simple structure and low cost. The filter member 61 may be fixed to an inner wall or an outer wall of the air discharge pipe 40 . In other embodiments, the filter element 61 may be another filter element having filtering properties, such as a filter mesh sheet.

[Example 2]

As shown in Figs. 4 and 5, the structure of Embodiment 2 is basically the same as that of Embodiment 1. The same part thereof may refer to the description of Embodiment 1 and is not described herein again. The difference is:

In this embodiment, the protective cover 50 is installed to cover the second inlet 41 point. The top of the protective cover 50 is sealed. That is, the top of the protective cover 50 is not opened. A through hole 51 is opened on the side of the protective cover 50 to communicate the internal cavity 20 and the air discharge pipe 40 .

Preferably, an included angle β of the axis of the through hole 51 and the axis of the air inlet pipe 30 is 90° or less. Therefore, the possibility that the liquid refrigerant flows into the air discharge pipe 40 is reduced.

[Example 3]

As shown in Fig. 6, the structure of Embodiment 3 is basically the same as that of Embodiments 1 and 2. The same part thereof can refer to the descriptions of Embodiment 1 and Embodiment 2, and will not be described herein again. The difference is:

In this embodiment, the protective cover 50 is installed to cover the first outlet 32 point. In addition, the protective cover 50 is installed to cover the second inlet 41 point. The first outlet 32 and the second inlet 41 are simultaneously installed in the protective cover 50 to communicate the inner cavity 20 with the air inlet pipe 30 and the air outlet pipe 40 . In this embodiment, the structure of the protective cover 50 installed at the point of the first outlet 32 is the same as that of Embodiment 1, and the structure of the protective cover 50 installed at the point of the second inlet 41 is the same as that of Embodiment 2. is the same as

Through this arrangement, it is possible to further prevent liquid droplets in the gas-liquid mixed refrigerant from flowing into the air discharge pipe and damaging the compressor due to liquid strike.

In the assembly process, the filter element 61 is welded onto the air outlet pipe 40 . The air discharge pipe 40 is press-fitted with the third cover body 13 . Inside the 1st cover body 11, the welding wire is covered. The second cylinder body 12 is press-fitted with the third cover body 13 . The outside of the second cylinder body 12 is covered with a welding wire, and then in-furnace brazing is performed. The air inlet pipe 30 and the air outlet pipe 40 are welded by spark soldering and then subjected to underwater inspection and packaging. This simplifies the process, reduces manufacturing costs, and simplifies the process.

During the operation, the gas-liquid mixed refrigerant flows in from the air inlet pipe 30 and flows out from the through hole 51 on the side of the protective cover 50 installed at the first outlet 32. Through the action of gravity, the gas-liquid refrigerant is separated from the liquid refrigerant. The gaseous refrigerant floats, and the liquid refrigerant is stored at the bottom of the liquid storage device 100 . The gaseous refrigerant flows into the air discharge pipe 40 from the through hole 51 of the protective cover 50 installed at the second inlet 41 through the intake action of the compressor. The lubricating oil stored at the bottom of the liquid storage device 100 together with the liquid refrigerant flows into the air discharge pipe 40 from the oil return hole 60, and is mixed with the liquid refrigerant before flowing into the compressor.

The liquid storage device 100 provided in the present application mainly covers the first outlet 32 of the air inlet pipe 30 and/or the second inlet 41 of the air outlet pipe 40 with the protective cover 50. install A through hole 51 is opened on the side of the protective cover 50 . When the refrigerant flows into the internal cavity 20 of the liquid storage device 100 from the air inlet pipe 30, the bottom and/or end of the protective cover 50 is sealed, so the bottom and/or end are impacted. After adding, it flows backward and flows out from the side through holes 51. Therefore, the problem that liquid droplets in the refrigerant flow into the compressor and are damaged due to liquid strike is solved. The oil return hole 60 and the filter member 61 installed in the air discharge pipe 40 can filter impurities flowing into the compressor from the oil return hole 60, so the impurities flow into the compressor and cause problems with the compressor. solve what

The technical features of the foregoing embodiments may be arbitrarily combined. For concise description, all possible combinations of technical features according to the foregoing embodiments have not been described, but as long as there is no contradiction in the combinations of technical features, they should all be considered within the scope described in the present invention.

The foregoing embodiments represent various embodiments of the present invention, and the description is relatively specific and detailed, but should not be construed as limiting the scope of the present invention patent. It should be noted that modifications and improvements may be made by those skilled in the art without departing from the spirit of the present invention, all of which fall within the protection scope of the present invention. Accordingly, the protection scope of the patent for the present invention is based on the appended claims.

Claims (10)

In the liquid storage device,
It includes a housing assembly 10, an air inlet pipe 30 and an air outlet pipe 40, the housing assembly 10 having an inner cavity 20, the air inlet pipe 30 and the air outlet pipe ( 40) has one end located within the inner cavity 20 and the other end extending to the outside of the housing assembly 10, respectively, and the air inlet pipe 30 is a first inlet located outside the housing assembly 10 ( 31) and a first outlet 32 located inside the housing assembly 10, the air discharge pipe 40 having a second inlet 41 located inside the inner cavity 20,
Here, the liquid storage device further includes a protective cover 50, the protective cover 50 is installed to cover at least one of the first outlet 32 point and the second inlet 41 point, A through hole 51 is opened on a side surface of the protective cover 50 to communicate the internal cavity 20 with at least one of the air inlet pipe 30 and the air outlet pipe 40, and the air outlet pipe 40 ), an oil return hole 60 is opened, and a filter member 61 is installed at a hole opening point of the oil return hole 60. According to claim 1,
The protective cover (50) is installed to cover the first outlet (32), and the inner bottom wall of the protective cover (50) has an arc shape. According to claim 1,
The protective cover (50) is installed to cover the first outlet (32), and the through hole (51) has an oval cross section. According to claim 1,
The protective cover 50 is installed to cover the first outlet 32, and the axis of the through hole 51 is an included angle with the axis of the portion of the air discharge pipe 40 located in the inner cavity 20. A liquid storage device with α greater than or equal to 90°. According to claim 1,
A flow area of the through hole (51) is greater than a flow area of at least one of the first outlet (32) and the second inlet (41). According to claim 1,
The protective cover 50 is installed to cover the point of the second inlet 41, and along the axial direction of the through hole 51, in a direction away from the air discharge pipe 40, the cross section of the through hole 51 A liquid storage device with a gradually increasing area. According to claim 1,
The protective cover 50 is installed to cover the point of the second inlet 41, and the axis of the through hole 51 has an included angle β with the axis of the air inlet pipe 30 of 90° or less. According to claim 1,
The through-holes (51) are plural, and the plurality of through-holes (51) surround the circumferential direction of the protective cover (50) and are uniformly distributed. According to claim 1,
A liquid storage device in which a distance range between an end surface of the first outlet (32) and an end surface of the second inlet (41) is 6 mm to 10 mm. According to claim 1,
The air discharge pipe 40 includes a straight pipe 401 and a bend pipe 402 connected to each other, the straight pipe 401 is located in the inner cavity 20, and the bend pipe 402 is far from the straight pipe 401. One end extends to the outside of the housing assembly 10, and the second inlet 41 is opened at an end far from the bend pipe 402 of the straight pipe 401.

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