JP2023529549A - accumulator - Google Patents

Abstract

TECHNICAL FIELD This application relates to the technical field of cooling, and in particular to accumulators. The accumulator provided in the present application includes a housing assembly having a chamber, an intake pipe, and an exhaust pipe, one end of the intake pipe and the exhaust pipe are each located within the chamber, and the other ends each extend outside the housing assembly. The accumulator further includes a protective cover, the protective cover is placed over the first outlet and/or the second inlet, and a side surface of the protective cover is arranged so that the chamber communicates with the intake pipe and/or the exhaust pipe. A through hole is formed in the exhaust pipe, an oil return hole is formed in the exhaust pipe, and a filter member is provided at the opening of the oil return hole. Compared with related technologies, the advantages of the present application are as follows. A protective cover is provided at the first outlet and/or the second inlet to solve the problem of droplets in the refrigerant entering the compressor and causing damage due to droplet impact, and an oil return hole and a filtering member provided in the exhaust pipe are provided. solves the problem of impurities and foreign matter entering the compressor and causing the compressor to stop. [Selection diagram] Figure 1

Description

This application claims priority to a patent application entitled "Accumulator" with application number 202021244993.4 filed with the State Intellectual Property Office of China on June 30, 2020.

The present application relates to the technical field of cooling, and in particular to accumulators.

An accumulator is one of the important components in a cooling system, and is usually installed between an evaporator and a compressor, and has roles such as refrigerant storage, gas-liquid separation, and impurity filtration.

In a conventional accumulator, the gas-liquid mixed refrigerant enters the exhaust pipe directly after entering the intake pipe, and some liquid refrigerant droplets enter the compressor from the exhaust pipe and cause damage due to droplet impact on the compressor. cause.

In view of this, the present application provides an accumulator with the following technical aspects for the above technical problems.

An accumulator provided in the present application includes a housing assembly having a chamber, an intake pipe having a first inlet located outside the housing assembly and a first outlet located within the housing assembly, an exhaust pipe, the intake pipe and The exhaust pipes each have one end located within the chamber and the other ends each extending out of the housing assembly, the accumulator further comprising a protective cover, the protective cover overlying the first outlet and/or the second inlet, and A through hole is drilled in the side surface of the protective cover so that the intake pipe and / or the exhaust pipe are communicated with, the exhaust pipe is drilled with an oil return hole, and the hole of the oil return hole A filtering member is provided in the mouth.

With this design, when the gas-liquid mixed refrigerant flows from the intake pipe, it avoids falling directly into the exhaust pipe, and prevents the droplets in the refrigerant from entering the compressor, causing the droplets to impact the compressor. By using the filtering member to filter the impurities in the refrigerant, it is possible to avoid the impurities from entering the compressor through the oil return hole and causing the compressor to stop. can.

In one embodiment, a protective cover is provided over the first outlet, and the inner bottom wall of the protective cover is arc-shaped.

With this design, the arc-shaped bottom wall plays the role of a guide for the refrigerant flow, reducing the pressure damage after the gas-liquid mixed refrigerant collides with the bottom wall of the intake pipe, thereby improving the intake effect. can increase

In one embodiment, the protective cover covers the first outlet, and the through hole has an elliptical cross-section.

By designing in this way, the cross-sectional area of the through-hole can be increased to increase the intake flow rate.

In one embodiment, the protective cover covers the first outlet, and the included angle α between the axis of the through hole and the axis located in the chamber portion of the exhaust pipe is greater than or equal to 90°.

This design ensures that the mouth of the through hole is located away from the exhaust pipe to reduce the possibility of liquid refrigerant flowing into the exhaust pipe.

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

By designing in this way, the performance of the product is improved by enhancing the intake efficiency and reducing noise. It is possible to avoid the occurrence of noise due to collision with the inner wall of the.

In one embodiment, the protective cover covers the second inlet, and the cross-sectional area of the through-hole gradually increases along the axial direction of the through-hole and away from the exhaust pipe.

This design avoids the liquid refrigerant from falling directly into the exhaust pipe when flowing from the intake pipe, and prevents the droplets in the refrigerant from entering the compressor and causing damage to the compressor due to droplet impact. At the same time, the cross-sectional area of the through-hole gradually increases so that the inner wall of the through-hole has a tapered or arcuate shape, thereby acting as a guide for the flow of the coolant, thereby reducing the pressure loss of the coolant. .

In one embodiment, the protective cover covers the second inlet, and the included angle β between the axis of the through hole and the axis of the intake pipe is 90° or less.

This design ensures that the mouth of the through hole is located away from the intake pipe to reduce the possibility of liquid refrigerant flowing into the exhaust pipe when the refrigerant flows out of the protective cover.

In one embodiment, there are a plurality of through holes, and the plurality of through holes are evenly distributed along the circumferential direction of the protective cover.

In one embodiment, the distance range between the end face of the first outlet and the end face of the second inlet is 6 mm to 10 mm.

This design further reduces the possibility of liquid refrigerant entering the exhaust pipe, but if the distance is too close, it will affect the gaseous refrigerant flowing into the exhaust pipe, and if the distance is too far, the liquid refrigerant will flow into the exhaust pipe. more likely to flow into

In one embodiment, the exhaust pipe includes a straight pipe and a curved pipe connected to each other, the straight pipe located in the chamber, the curved pipe having one end remote from the straight pipe extending to the outside of the housing assembly, a second Two inlets are drilled at one end of the straight pipe remote from the curved pipe.

Compared with the related art, the accumulator provided in the present application is provided with a protective cover on the first outlet and/or the second inlet, and a through hole is drilled in the side surface of the protective cover, so that the gas-liquid mixed refrigerant To prevent refrigerant from falling directly into the exhaust pipe when flowing from the intake pipe, prevent droplets in the refrigerant from entering the compressor, and avoid damage to the compressor due to droplet impact. By drilling an oil return hole at a position close to the second outlet of the exhaust pipe and providing a filter member at the opening of the oil return hole, impurities enter the compressor through the oil return hole and stop the compressor. avoid that.

1 is a structural schematic diagram of an accumulator of Example 1 provided in the present application; FIG. FIG. 2 is a partially enlarged structural schematic diagram of A in FIG. 1 ; FIG. 2 is a partially enlarged structural schematic diagram of B in FIG. 1 ; Fig. 2 is a structural schematic diagram of an accumulator of Example 2 provided in the present application; FIG. 5 is a partially enlarged structural schematic diagram of C in FIG. 4 ; Fig. 3 is a structural schematic diagram of an accumulator of Example 3 provided in the present application;

In the drawings, each symbol has the following meaning.
100 accumulator, 10 housing assembly, 11 first lid, 12 second cylinder, 13 third lid, 20 chamber, 30 intake pipe, 31 first inlet, 32 first outlet, 40 exhaust pipe, 401 straight pipe, 402 curved pipe, 41 second inlet, 42 second outlet, 50 protective cover, 51 through hole, 60 oil return hole, 61 filtering member.

Hereinafter, the technical aspects of the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention. Clearly not all. Any embodiment obtained by a person skilled in the art without creative work based on the embodiments in the present invention shall fall within the protection scope of the present invention.

It should be noted that when an assembly is said to be "attached" to another assembly, it may be attached directly to the other assembly or there may be intervening assemblies. When an assembly is considered to be "provided" in another assembly, it may be provided directly in the other assembly or there may be intervening assemblies at the same time. When an assembly is considered to be "fixed" to another assembly, it may be fixed directly to the other assembly or there may be intervening assemblies at the same time.

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. The terminology used in the specification of the present invention herein is for the purpose of describing specific embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any/and all combinations of one or more of the associated listed items.

Referring to Figures 1 to 6, the accumulator 100 provided in the present application is mainly used in refrigeration systems and is usually installed between the evaporator and compressor of air conditioning. When the refrigeration system is relatively lightly loaded, refrigerant can be returned to the accumulator 100 to stabilize the circulation of refrigerant in the system and ensure that the refrigeration system is in normal operating condition. When a part of the cooling system fails and needs maintenance, a certain operation is performed to collect the refrigerant in the cooling system into the accumulator 100 to avoid a large amount of refrigerant flowing out and being wasted. be able to.

As shown in FIGS. 1-3, the accumulator 100 includes a housing assembly 10 having a chamber 20 and an intake air having a first inlet 31 located outside the housing assembly 10 and a first outlet 32 located within the housing assembly 10 . a tube 30 and an exhaust tube 40 having a second inlet 41 located in the chamber 20 and a second outlet 42 located outside the housing assembly 10, one end of each of the intake tube 30 and the exhaust tube 40 being located within the chamber 20; , and the other ends each extend outside the housing assembly 10 .

The housing assembly 10 includes a first lid 11, a second cylinder 12 and a third lid 13. Both ends of the second cylinder 12 are connected to the first lid 11 and the third lid 13, respectively. The second cylinder 12 is a hollow cylinder, and a chamber 20 is formed by the second cylinder 12 , the first lid 11 and the third lid 13 . The first cover 11 is fixedly connected to the intake pipe 30 and the exhaust pipe 40 is fixedly connected to the third cover 13 .

In this embodiment, the intake pipe 30 and the exhaust pipe 40 are made of copper so that the user can easily weld them with other pipelines in the cooling system. Other materials may be used for production.

The exhaust pipe 40 includes a straight pipe 401 and a curved pipe 402 connected to each other, the straight pipe 401 is located in the chamber 20 , one end of the curved pipe 402 is connected to the straight pipe 401 and the other end is connected to the housing assembly 10 . Extending to the outside, the second outlet 42 is drilled into the curved pipe 402, the second inlet 41 is drilled into one end of the straight pipe 401 remote from the curved pipe 402, and the curved pipe 402 and the third The lid body 13 is connected to each other at a position close to the second outlet 42 .

Preferably, the connection between the intake pipe 30 and the first cover 11, between the exhaust pipe 40 and the third cover 13, and between the third cover 13 and the curved pipe 402 is welded and fixed, and the whole connection is achieved. The sealing performance and reliability can be improved, and the outer surface of the housing assembly 10 adopts a professional powder coating layer, which can be applied to severe level neutral salt spray test.

Example 1
1 to 3, the accumulator 100 includes a protective cover 50 overlying the first outlet 32, the bottom of the protective cover 50 being sealed, i.e. the bottom of the protective cover 50 having an opening. A through hole 51 is formed in the side surface of the protective cover 50 so that the chamber 20 and the intake pipe 30 are communicated with each other. An oil return hole 60 is formed in the straight pipe 401, and the oil return hole 60 is provided close to the curved pipe 402, that is, close to the bottom of the accumulator 100. is provided with a filtering member 61, which is used to filter impurities in the lubricating oil to avoid the impurities from entering the compressor through the oil return hole 60 and stopping the compressor.

With this design, when the gas-liquid mixed refrigerant flows from the intake pipe 30, it can be avoided to fall directly into the exhaust pipe 40, and droplets in the refrigerant can be prevented from entering the compressor, thereby preventing the refrigerant from entering the compressor. It can be seen to avoid drop impact damage from occurring. As the compressor runs for a long period of time, some of the lubricating oil inside is discharged with the gasified refrigerant, and the oil returns to the second outlet 42 of the straight pipe 401 in the chamber 20 of the accumulator 100 through the pipeline. By entering the hole 60, the lubricating oil that has precipitated at the bottom of the accumulator 100 returns to the exhaust pipe 40 of the accumulator 100 due to the suction force of the compressor and is mixed with the refrigerant. to lubricate and protect. By providing the filter member 61 in the oil return hole 60, the risk of the oil return hole 60 being clogged by impurities in the lubricating oil and the impurities entering the compressor and affecting the performance and service life of the compressor are reduced. .

Specifically, in this embodiment, four through holes 51 are formed. Of course, in another embodiment, the number of through-holes 51 may be five, six, seven or more, where the number of through-holes 51 is not limited.

The distance between the end face of the first outlet 32 and the end face of the second inlet 41 is in the range of 6 mm to 10 mm, which further reduces the possibility of liquid refrigerant entering the exhaust pipe 40. It affects the flow of refrigerant into the exhaust pipe 40 . Since the liquid refrigerant is stored at the bottom of the accumulator 100, the possibility of the liquid refrigerant flowing into the exhaust pipe 40 increases if the distance is too great.

The inner bottom wall of the protective cover 50 is arc-shaped, and the arc-shaped wall serves as a guide for the flow of the refrigerant, so that the gas-liquid mixed refrigerant collides with the bottom wall of the intake pipe 30 and is not pressure damaged. can be reduced and the intake effect can be enhanced.

In addition, both ends of the arc of the inner bottom wall of the protective cover 50 extend from the bottom of the protective cover 50 to the openings of the through holes 51 on both sides of the protective cover 50 in order to further reduce the pressure loss during the flow of the refrigerant. .

The cross-section of the through-hole 51 is elliptical so as to increase the cross-sectional area of the through-hole 51 and increase the intake flow rate.

Preferably, the included angle a between the axis of the through hole 51 and the axis of the straight pipe 401 is 90° or more. is provided apart from the straight pipe 401 , the possibility of the liquid refrigerant flowing into the exhaust pipe 40 can be reduced.

A plurality of through-holes 51 are formed in the side surface of the protective cover 50. The plurality of through-holes 51 are uniformly distributed along the circumferential direction of the protective cover 50, and the flow area of the through-holes 51 is The design of the larger flow area of the first outlet 32 improves the performance of the product by enhancing the air intake efficiency and reducing noise. collision against the inner wall of the exhaust pipe 40 to generate noise.

Furthermore, the cross-sectional area of the through-hole 51 gradually increases along the axial direction away from the intake pipe 30 of the through-hole 51, thereby avoiding the liquid refrigerant from falling directly into the exhaust pipe when flowing from the intake pipe. In addition, the through hole 51 is cut so that the inner wall of the through hole 51 has a tapered shape or an arc shape while preventing the compressor from being damaged by the droplet impact caused by the droplets in the refrigerant entering the compressor. The area gradually increases to act as a guide for the refrigerant flow, thereby reducing the pressure loss of the refrigerant.

In this embodiment, the filtering member 61 is a fabric filter with a simple structure and low cost. The filtering member 61 may be fixed to the inner wall or outer wall of the exhaust pipe 40 . In another embodiment, the filtering member 61 may be another filtering member having filtering properties, such as a sheet filter.

Example 2
As shown in FIGS. 4 and 5, the structure of Example 2 is basically the same as the structure of Example 1, and the common points can be referred to the description in Example 1, so here The differences are as follows.

In this embodiment, the protective cover 50 covers the second inlet 41 , the top of the protective cover 50 is sealed, i.e. there is no opening at the top of the protective cover 50 , and the chamber 20 and the exhaust pipe 40 are separated from each other. A through-hole 51 is formed in the side surface of the protective cover 50 so that it communicates with the .

Preferably, the included angle β between the axis of the through hole 51 and the axis of the intake pipe 30 is 90° or less, thereby reducing the possibility of the liquid refrigerant flowing into the exhaust pipe 40 .

Example 3
As shown in FIG. 6, the structure of Example 3 is basically the same as the structure of Examples 1 and 2, and the common points can be referred to the description in Examples 1 and 2. Since it can be done, it is omitted here, and the difference is as follows.

In this embodiment, the protective cover 50 covers the first outlet 32 and the protective cover 50 covers the second inlet 41, i.e. the first outlet 32 and the second inlet 41 are both A protective cover 50 is provided to provide communication between the chamber 20 and the intake pipe 30 and the exhaust pipe 40 . In this embodiment, the structure of the protective cover 50 provided at the first outlet 32 is the same as that of the first embodiment, and the structure of the protective cover 50 provided at the second inlet 41 is the same as that of the second embodiment. are the same.

With this design, it is possible to further prevent the compressor from being damaged by the droplet impact caused by the droplets in the refrigerant with the gas-liquid mixture preventing from entering the exhaust pipe.

In the assembly process, the filter member 61 is welded to the exhaust pipe 40, the exhaust pipe 40 and the third lid body 13 are interference-fitted, a welding wire is fitted inside the first lid body 11, and the second cylindrical body 12 and the third lid body are fitted. 3 The lid body 13 is interference fit, a welding wire is fitted around the second cylindrical body 12, furnace welding is performed, the intake pipe 30 and the exhaust pipe 40 are flame welded, and then an underwater inspection is performed before packing. Therefore, the process steps are simple, the manufacturing cost is reduced, and the process flow is simplified.

During the operation, the gas-liquid mixed refrigerant enters from the intake pipe 30 and flows out from the side through hole 51 of the protective cover 50 provided at the first outlet 32, and the gas-liquid refrigerant and the liquid refrigerant are separated by the action of gravity. , the gaseous refrigerant floats, the liquid refrigerant is stored at the bottom of the accumulator 100, and the gaseous refrigerant flows into the exhaust pipe 40 through the through hole 51 of the protective cover 50 provided at the second inlet 41 by the suction action of the compressor. The lubricating oil stored in the bottom of the accumulator 100 along with the liquid refrigerant enters the exhaust pipe 40 through the oil return hole 60 and is mixed with the liquid refrigerant before entering the compressor.

The accumulator 100 provided in the present application mainly covers the first outlet 32 of the intake pipe 30 and/or the second inlet 41 of the exhaust pipe 40 with a protective cover 50 , and the side of the protective cover 50 has a through hole 51 . so that when the refrigerant enters the chamber 20 of the accumulator 100 from the intake pipe 30, the bottom and/or end openings of the protective cover 50 are sealed, so that the refrigerant flows backward after impacting the bottom and/or end. flow out from the side through-hole 51 to solve the problem that droplets in the refrigerant enter the compressor and cause damage due to droplet impact. Since the oil return hole 60 and the filter member 61 provided in the exhaust pipe 40 can filter impurities entering the compressor through the oil return hole 60, there is a problem that impurities and foreign substances enter the compressor and stop the compressor. to solve.

Each technical feature of the above embodiments may be combined arbitrarily, and for the sake of brevity, all possible combinations of each technical feature in the above embodiments are not described, but the combination of these technical features Unless contradicted, both should be considered ranges as described herein.

Although the above examples are merely indicative of some embodiments of the invention, and the description is specific and detailed, they should not be taken as limiting the scope of the invention. It should be pointed out that a person skilled in the art can make further modifications and improvements without departing from the spirit of the present application, which all fall within the protection scope of the present application. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims (10)

A housing assembly (10) having a chamber (20) and an intake pipe having a first inlet (31) located outside said housing assembly (10) and a first outlet (32) located within said housing assembly (10). (30) and an exhaust pipe (40) having a second inlet (41) located in said chamber (20), one end of said intake pipe (30) and said exhaust pipe (40) respectively being connected to said chamber ( 20) with the other ends each extending out of said housing assembly (10),
Said accumulator further comprises a protective cover (50), said protective cover (50) covering said first outlet (32) and/or said second inlet (41), said chamber (20) and said intake pipe A through hole (51) is formed in the side surface of the protective cover (50) so as to communicate with (30) and/or the exhaust pipe (40). An accumulator having an oil return hole (60) drilled therein and a filter member (61) provided at the opening of said oil return hole (60). The accumulator according to claim 1, wherein the protective cover (50) covers the first outlet (32), and the inner bottom wall of the protective cover (50) has an arc shape. The accumulator according to claim 1, wherein the protective cover (50) covers the first outlet (32), and the through hole (51) has an oval cross section. The protective cover (50) covers the first outlet (32), and includes an included angle between the axis of the through hole (51) and the axis of the exhaust pipe (40) located in the chamber (20) portion. 2. The accumulator of claim 1, wherein [alpha] is greater than or equal to 90[deg.]. An accumulator according to claim 1, wherein the flow area of said through hole (51) is greater than the flow area of said first outlet (32) and/or said second inlet (41). The protective cover (50) covers the second inlet (41), and extends along the axial direction of the through hole (51) and away from the exhaust pipe (40). ) gradually increases in cross-sectional area. The protective cover (50) covers the second inlet (41), and an included angle β between the axis of the through hole (51) and the axis of the intake pipe (30) is 90° or less. Item 1. The accumulator according to item 1. The accumulator according to claim 1, wherein the through holes (51) are plural, and the plural through holes (51) are uniformly distributed along the circumferential direction of the protective cover (50). Accumulator according to claim 1, wherein the distance range between the end face of the first outlet (32) and the end face of the second inlet (41) is between 6 mm and 10 mm. Said exhaust pipe (40) comprises a straight pipe (401) and a curved pipe (402) connected to each other, said straight pipe (401) located in said chamber (20), said curved pipe (402) One end remote from the straight pipe (401) extends to the outside of the housing assembly (10), and the second inlet (41) is drilled at one end of the straight pipe (401) remote from the curved pipe (402). 2. The accumulator of claim 1, wherein:

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