Liquid accumulator and compressor

Abstract

The liquid accumulator comprises a barrel and a filter screen assembly, the inner wall of the barrel comprises a top wall and a side wall, the filter screen assembly comprises a filter screen support, the filter screen support comprises a top face support, a connecting frame and a side face support, one end of the connecting frame is connected with the top face support, and the other end of the connecting frame is connected with the side face support. The other end of the connecting frame is connected with one end of the side face support, the other end of the side face support is connected with the side wall of the barrel body, and the shortest distance between a first point on the upper surface of the top face support and the top wall of the barrel body is H, the shortest distance between any point, except the first point, on the upper surface of the top face support and the top wall of the barrel is h, and h / H = 0.8-1. According to the technical scheme, vortexes between the liquid storage device barrel and the filter screen support can be reduced, and the pressure loss of the liquid storage device is reduced.

Description

Technical Field

[0001] The present invention relates to the field of compressors, and more specifically, to a liquid receiver and a compressor. Background Art

[0002] A rotary compressor is a positive-displacement rotary compressor. The change in the working volume of the cylinder is achieved by the rolling of a cylindrical rotor with an eccentric device inside the cylinder. This type of compressor is widely used in household appliances and has the advantages of simple structure, small size, light weight, few components, high reliability, small vibration, and stable operation.

[0003] The liquid receiver is a multi-functional component in the compressor, which has functions such as filtering impurities, separating gas and liquid, storing liquid refrigerant, and silencing. The liquid receiver is composed of an inlet pipe, a filter screen assembly, a cylinder body, a reinforcing plate, an inner pipe, and an outlet pipe.

[0004] As Figures 1-3 shown in, the existing filter screen assembly is formed by 8-point welding of a filter screen support, a filter screen, and a pressing ring. The filter screen support is a combination of a convex sphere 1 and a flat surface, and there are 8 circular through-flow holes 2 on the flat surface. Through the calculation of the pressure loss of the liquid receiver, it is found that such a structure will have a large eddy current in the space between the filter screen support and the upper part of the cylinder body. The eddy current will cause energy dissipation, resulting in an increase in the pressure loss when the refrigerant flows through the liquid receiver. Summary of the Invention

[0005] Aiming at the problems in the prior art, the purpose of the present invention is to provide a liquid receiver and a compressor that can reduce eddy currents.

[0006] According to one aspect of the present invention, there is provided a liquid receiver, including a cylinder body and a filter screen assembly. The inner wall of the cylinder body includes a top wall and a side wall. The filter screen assembly includes a filter screen support, and the filter screen support includes a top surface support, a connecting frame, and a side surface support. One end of the top surface support is connected to one end of the connecting frame, the other end of the connecting frame is connected to one end of the side surface support, and the other end of the side surface support is connected to the side wall of the cylinder body. The shortest distance between the first point on the upper surface of the top surface support and the top wall of the cylinder body is H, and the shortest distance between any point other than the first point on the upper surface of the top surface support and the top wall of the cylinder body is h, and h / H = 0.8 - 1.

[0007] Preferably: 4mm < H < 15mm.

[0008] Preferably: the first point on the upper surface of the top surface support is the vertex of the top surface support, and H is the height difference between the top surface support and the top wall.

[0009] Preferably: the shape of the top wall of the cylinder body is an arc surface, and the shape of the top surface support is an arc surface and is the same as the shape of the top wall of the cylinder body.

[0010] Preferably, at least one through hole is further provided on the connecting frame.

[0011] Preferably, the through hole is located on the side of the connecting frame close to the top surface support.

[0012] Preferably, the through hole is an oval hole.

[0013] Preferably, the width of the through hole is L, and 4mm < L < 8mm.

[0014] Preferably, the number of the through holes is 4, and the 4 through holes are evenly distributed on the connecting frame.

[0015] Preferably, the shapes of the connecting frame and the side support are both annular.

[0016] According to another aspect of the present invention, a compressor is provided, which includes the liquid receiver according to the above.

[0017] The liquid receiver and the compressor of the present invention optimize the structure of the filter screen support, reduce the eddy current between the liquid receiver cylinder and the filter screen support, decrease the pressure loss of the liquid receiver, and reduce the overall height of the liquid receiver while keeping the effective volume of the liquid receiver unchanged, so as to facilitate installation and reduce costs. Description of the Drawings

[0018] Other features, objects, and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0019] Figure 1 is a schematic structural diagram of a prior art liquid receiver;

[0020] Figure 2 is a schematic cross-sectional structure diagram of a prior art filter screen support;

[0021] Figure 3 is a schematic top view structure diagram of a prior art filter screen support;

[0022] Figure 4 is a schematic structural diagram of the liquid receiver of the embodiment of the present invention;

[0023] Figure 5 is a schematic cross-sectional structure diagram of the filter screen support of the embodiment of the present invention;

[0024] Figure 6 is a schematic top view structure diagram of the filter screen support of the embodiment of the present invention.

[0025] Reference Signs

[0026] 1 Convex spherical filter screen support of the prior art

[0027] 2 Flow holes of the filter screen support in the prior art

[0028] 3 Top wall

[0029] 4 Side wall

[0030] 5 Top surface support

[0031] 6 Connecting frame

[0032] 7 Side surface support

[0033] 8 Bump

[0034] 9 Through hole Detailed implementation manners

[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures and thus their repetitive description will be omitted.

[0036] As Figure 4 shown in

[0037] In an embodiment of the present invention, a liquid reservoir and a compressor including the same are provided. The compressor is preferably a refrigeration compressor, and more preferably a rolling piston compressor, and is applicable to refrigeration fields such as air conditioners and refrigerators.

[0038] The liquid reservoir includes a cylinder body and a filter screen assembly.

[0039] The inner wall of the cylinder body includes a top wall 3 and a side wall 4. The top wall 3 is the upper arc-shaped part of the inner wall of the cylinder body. The side wall 4 is the side part of the inner wall of the cylinder body.

[0040] The top wall 3 generally has a smooth surface. Preferably, the shape of the top wall 3 is an arc surface. Of course, the shape of the top wall 3 is not limited to a single arc surface, and it can also be a combination of arc surfaces, or a combination of a flat surface and an arc surface, and no limitation is made here.

[0041] And in combination with what is shown in Figure 5 the filter screen assembly includes a filter screen support, and the filter screen support includes a top surface support 5, a connecting frame 6 and a side surface support 7.

[0042] The shortest distance between the first point on the upper surface of the top surface support 5 and the top wall 3 of the cylinder body is H, and the shortest distance between any point other than the first point on the upper surface of the top surface support 5 and the top wall 3 of the cylinder body is h, and h / H = 0.8 - 1.

[0043] The shortest distance between each point on the upper surface of the top bracket 5 in the embodiment of the present invention and the top wall 3 of the cylinder is the same or approximately the same, that is, the shape of the top bracket 5 is the same as or not much different from the shape of the top wall 3 of the cylinder. The shape of the top bracket 5 is formed by translating the shape of the top wall 3 of the cylinder. And preferably h / H = 0.9 - 1, more preferably h / H = 0.95 - 1, that is, there can be a difference of 0.1 - 0.05 in the details of the shape between the top bracket 5 and the top wall 3 of the cylinder. In this way, the fluid channel between the top bracket 5 and the top wall 3 of the cylinder can be a generally parallel and smooth channel, compared with Figure 1 and 2 the arc-shaped and convex cavity flow channels formed by the existing filter screen bracket and the inner wall of the cylinder shown in, the fluid flow is smoother and more stable, greatly reducing the eddy current and reducing a large amount of energy dissipation, and thus the pressure loss when the refrigerant flows through the liquid receiver can be reduced.

[0044] Another example is Figure 4 shown in, one end of the connecting frame 6 is connected to the top bracket 5. Preferably, the shape of the connecting frame 6 is annular, with the inner side as one end and the outer side as the other end.

[0045] The other end of the connecting frame 6 is connected to one end of the side bracket 7. The other end of the side bracket 7 is connected to the side wall 4 of the cylinder. Preferably, the shape of the side bracket 7 is annular, that is, it is approximately the same as the shape of the side wall 4 of the cylinder, making the connection between the filter screen bracket and the inner wall of the cylinder more firm.

[0046] In the embodiment of the present invention, by optimizing the shape of the top bracket that is approximately the same as the upper part of the inner wall of the cylinder, the eddy current can be reduced, and the pressure loss of the liquid receiver can be decreased.

[0047] In addition, as Figure 4 shown in, in the embodiment of the present invention, preferably, the first point on the upper surface of the top bracket 5 is the vertex of the top bracket 5, H is the height difference between the top bracket 5 and the top wall 3, and preferably 4 mm < H < 15 mm. More preferably 6 mm < H < 10 mm. In this way, the fluid channel between the top bracket 5 and the top wall 3 of the cylinder can be narrowed, the fluid flow space can be reduced, the eddy current between the top bracket 5 and the top wall 3 of the cylinder can be further reduced, the pressure loss can be decreased, and at the same time, the height of the liquid receiver can be reduced. When the effective volume of the liquid receiver remains unchanged, the reduction of the overall height of the liquid receiver is convenient for installation and can also reduce costs.

[0048] Such as Figure 4 and Figure 6 shown in, in the embodiment of the present invention, preferably, the filter screen assembly includes a filter screen, and the connecting frame 6 is also provided with bump points 8 connected to the edge of the filter screen. And preferably, the filter screen is connected to the bump points 8 through a compression ring. The bump points 8 and the compression ring can conveniently and firmly fix and install the filter screen to the connecting frame 6.

[0049] As shown in Figure 6 In the embodiment of the present invention, it is preferable that at least one through hole 9 is further provided in the area of the connecting frame 6 between the bump 8 and one end of the connecting frame 6 connected to the top surface bracket 5, that is, the through hole 9 is located between the bump 8 and the top surface bracket 5. And preferably, the through hole 9 is located on the side of the connecting frame 6 close to the top surface bracket 5 and is arranged around the top surface bracket 5. Further preferably, the through hole 9 is an oval hole, that is, a hole with a curved elongated shape. Of course, it can also be a rectangular hole, an irregular hole, etc. The design that the through hole 9 is an oval hole and is located on one side of the connecting frame 6 can greatly reduce the space occupied by the through hole 9 in the radial direction, and the formation of the through hole 9 is more convenient compared to the original bending and punching.

[0050] And as shown in Figure 5 and 6 In the embodiment of the present invention, it is preferable that the width of the through hole 9 is L, where 4 mm < L < 8 mm. At the same time, it is preferable that the diameter of the top surface bracket 5 in the filter screen bracket is Φd, the inner diameter of the bump 8 is ΦD, and Φk = ΦD - Φd, where 8 mm < ΦD - Φd < 16 mm, that is, it is preferable that the width of the through hole 9 is half of Φk. In this way, the space of the connecting frame 6 can be fully utilized, which is convenient for the connecting frame 6 to fix the filter screen through the bump 8 and can ensure the area of the through hole 9 as much as possible without occupying the radial space.

[0051] As shown in Figure 6 In the embodiment of the present invention, it is preferable that the number of bumps 8 is 8, and the 8 bumps 8 are evenly distributed on the connecting frame. It is preferable that the number of oval through holes 9 is 4, and the 4 oval through holes 9 are evenly distributed on the connecting frame. Of course, it can also be 2 or 3, or 5 or 6. The embodiment of the present invention does not limit the number of through holes.

[0052] Through experimental verification, compared with the existing Figure 1 and Figure 2 liquid storage structure, by using the optimized liquid storage structure in the embodiment of the present invention, the pressure loss of the liquid storage can be reduced by 5.04%.

[0053] In summary, the technical solution of the embodiment of the present invention optimizes the structure of the filter screen bracket, reduces the eddy current between the liquid storage cylinder body and the filter screen bracket, reduces the pressure loss of the liquid storage, and reduces the overall height of the liquid storage under the condition that the effective volume of the liquid storage remains unchanged, so as to be convenient for installation and reduce costs.

[0054] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A liquid reservoir, characterized in that: it includes a cylinder body and a filter screen assembly. The inner wall of the cylinder body includes a top wall and a side wall. The filter screen assembly includes a filter screen support. The filter screen support includes a top surface support, a connecting frame and a side surface support. One end of the top surface support is connected to one end of the connecting frame. The other end of the connecting frame is connected to one end of the side surface support. The other end of the side surface support is connected to the side wall of the cylinder body. The shortest distance between a first point on the upper surface of the top surface support and the top wall of the cylinder body is H. The shortest distance between any point other than the first point on the upper surface of the top surface support and the top wall of the cylinder body is h, and h / H = 0.8 to 1.

2. The liquid reservoir according to claim 1, characterized in that: 4mm < H < 15mm.

3. The liquid reservoir according to claim 1, characterized in that: the first point on the upper surface of the top surface support is the vertex of the top surface support, and the H is the height difference between the top surface support and the top wall.

4. The liquid reservoir according to claim 1, characterized in that: the shape of the top wall of the cylinder body is an arc surface, and the shape of the top surface support is an arc surface and is the same as the shape of the top wall of the cylinder body.

5. The liquid reservoir according to claim 1, characterized in that: at least one through hole is further provided on the connecting frame.

6. The liquid reservoir according to claim 5, characterized in that: the through hole is located on the side of the connecting frame close to the top surface support.

7. The liquid reservoir according to claim 6, characterized in that: the through hole is an oblong hole.

8. The liquid reservoir according to claim 6, characterized in that: the width of the through hole is L, 4mm < L < 8mm.

9. The liquid reservoir according to claim 1, characterized in that: the shapes of the connecting frame and the side surface support are both annular.

10. A compressor, characterized in that: it includes the liquid reservoir according to any one of claims 1 to 9.

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