Pump body components and fluid machinery

Abstract

This invention provides a pump body assembly and a fluid machine. The pump body assembly includes a liquid inlet section, which includes: a cylinder liner having a liquid inlet channel; a liquid inlet pipe, the first end of which extends into the liquid inlet channel and connects to the cylinder liner; and a filter element, at least a portion of which is disposed within the liquid inlet channel for filtering refrigerant entering the cylinder liner through the liquid inlet pipe. This invention solves the problem of poor applicability of fluid machines in the prior art.

Description

[0001] This application is a divisional application of the invention patent filed on October 28, 2024, with application number 202411513668.6 and invention title "Pump Body Assembly and Fluid Machinery". Technical Field

[0002] This invention relates to the field of heat exchange equipment technology, and more specifically, to a pump assembly and fluid machinery. Background Technology

[0003] With the development of society, the power consumption of data centers is increasing year by year, resulting in huge power consumption. Data center air conditioning is an important component of data centers, accounting for 40% of the power consumption of data centers, and the application of its energy-saving technology is of great significance.

[0004] Data center air conditioning systems are devices used to cool the electrical components of data centers. They need to provide continuous cooling year-round to ensure the indoor temperature remains within a certain range. Most existing data center air conditioning systems use compression refrigeration technology, relying on this system for cooling in both summer and winter. When the ambient temperature is high, existing compression refrigeration technology can meet performance and energy efficiency requirements; however, when the outdoor ambient temperature is significantly lower than the indoor temperature, the most economical and energy-efficient cooling method is to use the low outdoor temperature to cool the indoor temperature. In this case, a liquid pump is used instead of a compressor to drive the refrigerant in the system. This method is more energy efficient than conventional air conditioning systems. In the industry, this system that uses a pump to drive the refrigerant is called a refrigerant pump system; the pump that drives the refrigerant is called a refrigerant pump.

[0005] Fluorine pumps generate various impurities during operation, requiring filtration. Existing fluorine pumps typically have a filter installed at the inlet, and the filter and pump are sold together. Since fluorine pumps with filters are much larger than those without filters, more space needs to be reserved for installation, making it impossible to install them in confined or compact spaces. At the same time, the packaging size of fluorine pumps with external filters is also relatively large, increasing packaging costs.

[0006] As can be seen from the above, the existing technology has the problem of poor applicability to fluid machinery. Summary of the Invention

[0007] The main objective of this invention is to provide a pump assembly and fluid machinery to solve the problem of poor applicability of fluid machinery in the prior art.

[0008] To achieve the above objectives, according to one aspect of the present invention, a pump body assembly is provided, including a liquid inlet portion, the liquid inlet portion comprising: a cylinder liner having a liquid inlet channel; a liquid inlet pipe having a first end extending into the liquid inlet channel and connected to the cylinder liner; and a filter element having at least a portion disposed within the liquid inlet channel for filtering refrigerant entering the cylinder liner from the liquid inlet pipe.

[0009] Furthermore, the liquid inlet channel includes a first channel and a second channel connected sequentially from the outside to the inside. The inner diameter of the second channel is smaller than that of the first channel to form a limiting step. The periphery of the filter element abuts against the limiting step and stops. The first end of the liquid inlet pipe is located inside the first channel.

[0010] Furthermore, the liquid inlet section also includes a seal, which is disposed inside the liquid inlet pipe and located at the first end of the liquid inlet pipe, for sealing the liquid inlet pipe and the filter element.

[0011] Furthermore, the filter element includes a circular frame and a mesh, the circular frame abutting against the limiting step, and at least a portion of the mesh is located within the second channel.

[0012] Furthermore, the outer diameter D1 of the circular ring skeleton, the maximum outer diameter D2 of the mesh, the inner diameter DQ1 of the first channel, and the inner diameter DQ2 of the second channel satisfy: D1≤DQ1; and / or D1>DQ2; and / or D2≤DQ2.

[0013] Furthermore, the outer diameter D1 of the circular ring skeleton and the inner diameter DQ2 of the second channel satisfy: D1>DQ2+2mm.

[0014] Furthermore, the cylinder liner also has a liquid inlet buffer groove, which is connected to the second channel, and at least a portion of the mesh is located in the liquid inlet buffer groove.

[0015] Furthermore, the axial length L1 of the mesh body and the overall axial length LQ of the second channel and the inlet buffer tank satisfy: L1 <LQ。

[0016] Furthermore, the axial length L1 of the mesh body, and the overall axial length LQ of the second channel and the inlet buffer tank satisfy: L1 + 5mm <LQ。

[0017] Furthermore, the liquid inlet channel includes a first channel and a second channel connected sequentially from the outside to the inside. The inner diameter of the second channel is smaller than that of the first channel to form a limiting step. The liquid inlet part also includes a sealing element, which is disposed at the first end of the liquid inlet pipe and at least a portion of it is located inside the liquid inlet pipe. The filter element is connected to the sealing element. The first end of the liquid inlet pipe and the sealing element abut against the limiting step. At least a portion of the filter element is located inside the second channel.

[0018] Furthermore, the sealing element includes a first section, a first reduced diameter section and a second section connected in sequence. The first section is located inside the liquid inlet pipe, the first reduced diameter section abuts against and is limited by the limiting step, and the second section is located inside the second channel and is connected to the filter element.

[0019] Furthermore, the outer diameter D3 of the second segment and the inner diameter DQ2 of the second channel satisfy: D3 <DQ2-0.1mm。

[0020] Furthermore, the cylinder liner also has an inlet buffer groove, which is connected to the second channel. At least a portion of the filter element is located within the inlet buffer groove. The overall axial length L2 of the second section and the filter element, and the overall axial length LQ of the second channel and the inlet buffer groove satisfy: L2 <LQ。

[0021] Furthermore, the overall axial length L2 of the second section and the filter element, and the overall axial length LQ of the second channel and the inlet buffer tank satisfy: L2 + 5mm <LQ。

[0022] Furthermore, the liquid inlet channel includes a first channel and a second channel connected sequentially from the outside to the inside. The inner diameter of the second channel is smaller than that of the first channel to form a limiting step. The filter element is connected to the first end of the liquid inlet pipe, and the first end of the liquid inlet pipe abuts against the limiting step. At least a portion of the filter element is located in the second channel.

[0023] Furthermore, the first end of the liquid inlet pipe includes a third section, a second reduced diameter section, and a fourth section connected in sequence. The third section is located in the first channel, the second reduced diameter section abuts against and is limited by the limiting step, and the fourth section is located in the second channel and is connected to the filter element.

[0024] Furthermore, the liquid inlet section also includes a seal, which is located in the third section and is used to seal the liquid inlet pipe and the filter.

[0025] Furthermore, the outer diameter D4 of the fourth segment and the inner diameter DQ2 of the second channel satisfy: D4 <DQ2-0.1mm。

[0026] Furthermore, the cylinder liner also has an inlet buffer groove, which is connected to the second channel. At least a portion of the filter element is located within the inlet buffer groove. The overall axial length L3 of the fourth section and the filter element, and the overall axial length LQ of the second channel and the inlet buffer groove satisfy: L3 <LQ。

[0027] Furthermore, the overall axial length L3 of the fourth section and the filter element, and the overall axial length LQ of the second channel and the inlet buffer tank satisfy: L3 + 5mm <LQ。

[0028] According to another aspect of the invention, a fluid machine is also provided, comprising the pump body assembly described above.

[0029] Furthermore, the fluid machinery is a fluorine pump.

[0030] Applying the technical solution of this invention, the pump body assembly includes a liquid inlet section, which comprises a cylinder liner, a liquid inlet pipe, and a filter element. The cylinder liner has a liquid inlet channel, and the first end of the liquid inlet pipe extends into the liquid inlet channel and connects to the cylinder liner. At least a portion of the filter element is disposed within the liquid inlet channel for filtering the refrigerant entering the cylinder liner through the liquid inlet pipe. By rationally designing the internal structure of the pump body assembly, the filter element is internally mounted, which not only better filters impurities but also makes the pump body assembly more compact. This allows the fluid machinery with the pump body assembly to be installed in confined and compact spaces, greatly improving the applicability of the fluid machinery and solving the problem of poor applicability in existing fluid machinery. Furthermore, the above design also allows for a smaller outer packaging box for the fluid machinery, reducing packaging costs. Attached Figure Description

[0031] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0032] Figure 1 A schematic diagram of the pump body assembly in Embodiment 1 of the present invention is shown;

[0033] Figure 2 A cross-sectional view of the pump body assembly in Embodiment 1 of the present invention is shown;

[0034] Figure 3 An exploded view of the pump body assembly in Embodiment 1 of the present invention is shown;

[0035] Figure 4 A schematic diagram of the filter element in Embodiment 1 of the present invention is shown;

[0036] Figure 5 A schematic diagram showing the dimensional parameters of the pump body assembly in Embodiment 1 of the present invention is shown;

[0037] Figure 6 A cross-sectional view of the pump body assembly in Embodiment 2 of the present invention is shown;

[0038] Figure 7 A schematic diagram of the filter element and sealing element in Embodiment 2 of the present invention is shown;

[0039] Figure 8 A schematic diagram showing the dimensional parameters of the pump body assembly in Embodiment 2 of the present invention is shown;

[0040] Figure 9 A cross-sectional view of the pump body assembly in Embodiment 3 of the present invention is shown;

[0041] Figure 10 A schematic diagram of the filter element and inlet pipe in Embodiment 3 of the present invention is shown;

[0042] Figure 11 A schematic diagram showing the dimensional parameters of the pump body assembly in Embodiment 3 of the present invention is shown;

[0043] Figure 12 A schematic diagram of the structure of a fluid machine according to a specific embodiment of the present invention is shown;

[0044] Figure 13 It shows Figure 12 Cross-sectional view at point AA.

[0045] The above figures include the following reference numerals:

[0046] 10. Cylinder liner; 11. Liquid inlet channel; 111. First channel; 112. Second channel; 113. Limiting step; 12. Liquid inlet buffer tank; 13. Liquid inlet tank; 14. Liquid outlet channel; 20. Liquid inlet pipe; 21. Third section; 22. Second diameter reduction section; 23. Fourth section; 30. Filter element; 31. Circular skeleton; 32. Mesh body; 33. Spiral skeleton; 40. Seal; 41. First section; 42. First diameter reduction section; 43. Second section; 50. Flange; 60. Crankshaft; 70. Piston assembly; 80. Housing; 81. Liquid inlet; 82. Liquid outlet; 90. Motor assembly. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0048] To address the poor applicability of existing fluid machinery, this invention provides a pump assembly and a fluid machine. The fluid machine includes the pump assembly described below.

[0049] Example 1

[0050] like Figures 1 to 5 ,as well as Figure 13As shown, the pump assembly includes an inlet section, an outlet section, a crankshaft 60, a piston assembly 70, and two flanges 50. The inlet section includes a cylinder liner 10, an inlet pipe 20, and a filter element 30. Refrigerant enters the variable-volume chamber formed by the piston assembly 70 and the cylinder liner 10 through the inlet pipe 20, is compressed under the drive of the crankshaft 60, and is discharged through the outlet section. The cylinder liner 10 has an inlet channel 11. A first end of the inlet pipe 20 extends into the inlet channel 11 and connects to the cylinder liner 10. At least a portion of the filter element 30 is disposed within the inlet channel 11 for filtering the refrigerant entering the cylinder liner 10 through the inlet pipe 20. It is understood that the first end of the inlet pipe 20 is the end closest to the cylinder liner 10.

[0051] By configuring the pump body assembly to include a liquid inlet section, which comprises a cylinder liner 10, a liquid inlet pipe 20, and a filter element 30, the cylinder liner 10 has a liquid inlet channel 11. The first end of the liquid inlet pipe 20 extends into the liquid inlet channel 11 and connects to the cylinder liner 10. At least a portion of the filter element 30 is disposed within the liquid inlet channel 11 to filter the refrigerant entering the cylinder liner 10 through the liquid inlet pipe 20. This rational design of the pump body assembly's internal structure allows for the built-in installation of the filter element 30, resulting in better impurity filtration and a more compact pump body assembly structure. This allows the fluid machinery with the pump body assembly to be installed in confined spaces, significantly improving its applicability. Furthermore, this design also allows for a smaller outer packaging box for the fluid machinery, reducing packaging costs.

[0052] like Figure 3 and Figure 5 As shown, the liquid inlet channel 11 includes a first channel 111 and a second channel 112 connected sequentially from the outside to the inside. The inner diameter of the second channel 112 is smaller than the inner diameter of the first channel 111 to form a limiting step 113. The first channel 111 and the second channel 112 are coaxially arranged. The periphery of the filter element 30 abuts against the limiting step 113, and the first end of the liquid inlet pipe 20 is located inside the first channel 111.

[0053] like Figures 1 to 3 As shown, the liquid inlet section also includes a seal 40. The seal 40 is disposed inside the liquid inlet pipe 20 and located at the first end of the liquid inlet pipe 20, and is used to seal the liquid inlet pipe 20 and the filter element 30.

[0054] In this embodiment, the sealing element 40 is an annular sealing ring with an inwardly folded periphery at one end. The end with the folded periphery abuts against the filter element 30. The sealing ring can be made of rubber.

[0055] like Figure 4 As shown, the filter element 30 includes an annular frame 31 and a mesh 32. The annular frame 31 abuts against the limiting step 113, and at least a portion of the mesh 32 is located within the second channel 112.

[0056] Furthermore, such as Figure 4 As shown, the filter element 30 also includes a spiral skeleton 33, which is disposed on the mesh body 32 and one end is connected and fixed to the circular skeleton 31, thereby improving the overall structural strength of the filter element 30 and assisting the mesh body 32 in withstanding the impact force of the fluid.

[0057] Specifically, during assembly, the filter element 30 is first placed into the liquid inlet channel 11 of the cylinder liner 10, with the annular skeleton 31 of the filter element 30 fitting against the limiting step 113 of the liquid inlet channel 11. Then, the liquid inlet pipe 20 is installed, and finally, the sealing element 40 is hammered into the liquid inlet pipe 20. The liquid inlet pipe 20 and the liquid inlet channel 11 are radially interference-fitted, and the sealing element 40 tightly presses the liquid inlet pipe 20 and the liquid inlet channel 11 together radially to achieve a sealing effect. As the seal 40 is squeezed into the inlet channel 11 along the axial direction, the seal 40 not only seals but also compresses the annular skeleton 31 of the filter element 30 along the axial direction of the inlet channel 11, making the annular skeleton 31 and the limiting step 113 of the inlet channel 11 tightly connected. This makes the annular skeleton 31 of the filter element 30 firm and prevents it from shaking. At the same time, the annular skeleton 31 and the limiting step 113 are closely fitted, so that the fluid can only flow through the mesh 32, preventing impurities in the fluid from leaking into the pump body assembly from the annular skeleton 31.

[0058] like Figure 5 As shown, the outer diameter D1 of the annular skeleton 31, the maximum outer diameter D2 of the mesh 32, the inner diameter DQ1 of the first channel 111, and the inner diameter DQ2 of the second channel 112 satisfy: D1≤DQ1; and / or D1>DQ2; and / or D2≤DQ2. It can be understood that in this embodiment, the mesh 32 gradually narrows from the direction away from the annular skeleton 31; therefore, the maximum outer diameter D2 of the mesh 32 is the outer diameter at one end closest to the annular skeleton 31.

[0059] More preferably, the outer diameter D1 of the ring skeleton 31 and the inner diameter DQ2 of the second channel 112 satisfy: D1>DQ2+2mm.

[0060] like Figures 1 to 3 , Figure 5 As shown, the cylinder liner 10 also has a liquid inlet buffer groove 12, which is connected to the second channel 112, and at least a portion of the mesh 32 is located within the liquid inlet buffer groove 12. Furthermore, the cylinder liner 10 also has two liquid inlet grooves 13, each connected to the liquid inlet buffer groove 12. It can be understood that, on the liquid inlet side, the liquid inlet channel 11, the liquid inlet buffer groove 12, and the liquid inlet groove 13 sequentially penetrate the inner and outer walls of the cylinder liner 10.

[0061] like Figures 1 to 3 , Figure 5As shown, the cylinder liner 10 also has a liquid discharge channel 14 which penetrates the inner and outer wall surfaces of the cylinder liner 10. Corresponding to the two liquid inlet grooves 13, there are also two liquid discharge channels 14.

[0062] As Figure 5 shown, the axial length L1 of the mesh body 32, the overall axial length LQ of the second channel 112 and the liquid inlet buffer groove 12 satisfy: L1 < LQ. That is to say, a part of the mesh body 32 can extend from the second channel 112 into the liquid inlet buffer groove 12 to increase the filtration area, but it cannot contact the inner side wall of the liquid inlet buffer groove 12 to prevent damage to the filter element 30.

[0063] Further preferably, the axial length L1 of the mesh body 32, the overall axial length LQ of the second channel 112 and the liquid inlet buffer groove 12 satisfy: L1 + 5mm < LQ.

[0064] As Figures 12 to 13 shown, the present application also provides a fluid machine, including the above-mentioned pump body assembly. Further, the fluid machine also includes a housing 80 and a motor assembly 90. The pump body assembly and the motor assembly 90 are accommodated in the housing 80. The housing 80 has a liquid inlet 81 and a liquid discharge 82, which are respectively connected to the liquid inlet channel 11 and the liquid discharge channel 14. The motor assembly 90 is drivingly connected to the crankshaft 60 for driving the crankshaft 60 to rotate.

[0065] Specifically, the piston assembly 70 in this embodiment is a cross-slider mechanism, including a piston sleeve and a piston. The piston sleeve is rotatably arranged in the cylinder liner 10. The piston sleeve has two limiting channels, and the two limiting channels are sequentially arranged along the axial direction of the crankshaft 60. The extending direction of the limiting channels is perpendicular to the axial direction of the crankshaft 60; the piston has through holes, there are two pistons, the crankshaft 60 includes two eccentric parts, and the two eccentric parts correspondingly extend into the two through holes of the two pistons. The two pistons are correspondingly slidably arranged in the two limiting channels and respectively form two variable volume chambers. The two variable volume chambers are respectively located in the sliding directions of the two pistons. When the crankshaft 60 rotates to drive the piston to reciprocate in the limiting channel, it interacts with the piston sleeve to make the piston sleeve and the piston rotate in the cylinder liner 10.

[0066] In this embodiment, the fluid machine is a fluorine pump.

[0067] Embodiment 2

[0068] The difference between this embodiment and Embodiment 1 is that the setting form of the filter element is different.

[0069] In this embodiment, as Figures 6 to 8As shown, the seal 40 is disposed at the first end of the inlet pipe 20 and at least a portion of it is located inside the inlet pipe 20. The filter element 30 is connected to the seal 40, the first end of the inlet pipe 20 and the seal 40 abut against the limiting step 113, and at least a portion of the filter element 30 is located inside the second channel 112.

[0070] In other words, the filter element 30 in this embodiment is not set separately, but is integrated with the sealing element 40.

[0071] like Figure 7 As shown, the sealing element 40 includes a first section 41, a first reduced diameter section 42, and a second section 43 connected in sequence. The first section 41 is located inside the liquid inlet pipe 20, the first reduced diameter section 42 abuts against and is limited by the limiting step 113, and the second section 43 is located inside the second channel 112 and is connected to the filter element 30.

[0072] Specifically, during assembly, first insert the inlet pipe 20 into the inlet channel 11, and then snap the seal 40 with the filter element 30 into the installation position. Since the seal 40, the inlet pipe 20, and the inlet channel 11 are interference fit, the seal 40 needs to be tapped and squeezed into the inlet channel 11. The filter element 30 is fixed in the inlet channel 11 together with the seal 40.

[0073] In this embodiment, the inner circumferential surface of one end of the sealing member 40 has an annular groove, and one end of the filter member 30 has a matching retaining ring. The retaining ring extends into the sealing member 40 and engages with the annular groove, thereby achieving the connection and fixation between the sealing member 40 and the filter member 30.

[0074] like Figure 8 As shown, the outer diameter D3 of the second segment 43 and the inner diameter DQ2 of the second channel 112 satisfy: D3 <DQ2-0.1mm。

[0075] like Figure 8 As shown, the overall axial length L2 of the second section 43 and the filter element 30, and the overall axial length LQ of the second channel 112 and the liquid inlet buffer tank 12 satisfy: L2 <LQ。

[0076] More preferably, the overall axial length L2 of the second section 43 and the filter element 30, and the overall axial length LQ of the second channel 112 and the liquid inlet buffer tank 12 satisfy: L2 + 5mm <LQ。

[0077] Example 3

[0078] The difference between this embodiment and Embodiment 1 is that the filter element is arranged differently.

[0079] In this embodiment, as Figures 9 to 11As shown, the filter element 30 is connected to the first end of the liquid inlet pipe 20, the first end of the liquid inlet pipe 20 abuts against the limiting step 113, and at least a portion of the filter element 30 is located in the second channel 112.

[0080] In other words, the filter element 30 in this embodiment is not set separately, but is integrated with the liquid inlet pipe 20.

[0081] like Figure 10 As shown, the first end of the inlet pipe 20 includes a third section 21, a second reduced-diameter section 22, and a fourth section 23 connected in sequence. The third section 21 is located within the first channel 111, the second reduced-diameter section 22 abuts against and is limited by the limiting step 113, and the fourth section 23 is located within the second channel 112 and connected to the filter element 30. Furthermore, a sealing element 40 is disposed within the third section 21 to seal the inlet pipe 20 and the filter element 30.

[0082] Specifically, during assembly, the inlet pipe 20 with the filter element 30 is first inserted into the inlet channel 11. Then, the sealing element 40 is forced into the inlet pipe 20 by tapping or other means. Due to the interference fit, after the sealing element 40 is forced in, it tightly presses the inlet pipe 20 against the inner wall of the inlet channel 11. At the same time, the sealing element 40 pushes the second reduced diameter section 22 of the inlet pipe 20 towards the limiting step 113 of the inlet channel 11, ensuring tight contact. The filter element 30 is fixed in the inlet channel 11 along with the inlet pipe 20.

[0083] like Figure 11 As shown, the outer diameter D4 of the fourth segment 23 and the inner diameter DQ2 of the second channel 112 satisfy: D4 <DQ2-0.1mm。

[0084] like Figure 11 As shown, the overall axial length L3 of the fourth segment 23 and the filter element 30, and the overall axial length LQ of the second channel 112 and the liquid inlet buffer tank 12 satisfy: L3 <LQ。

[0085] More preferably, the overall axial length L3 of the fourth section 23 and the filter element 30, and the overall axial length LQ of the second channel 112 and the liquid inlet buffer tank 12 satisfy: L3 + 5mm <LQ。

[0086] From the above description, it can be seen that the embodiments of the present invention achieve the following technical effects: By setting the pump body assembly to include a liquid inlet section, the liquid inlet section including a cylinder liner 10, a liquid inlet pipe 20, and a filter element 30, the cylinder liner 10 has a liquid inlet channel 11, the first end of the liquid inlet pipe 20 extends into the liquid inlet channel 11 and connects to the cylinder liner 10, and at least a portion of the filter element 30 is disposed in the liquid inlet channel 11 for filtering the refrigerant entering the cylinder liner 10 through the liquid inlet pipe 20, the internal structure of the pump body assembly is reasonably set so that the filter element 30 is internally disposed, which can better filter impurities while making the structure of the pump body assembly more compact. This allows the fluid machinery with the pump body assembly to be installed in confined and compact spaces, greatly improving the applicability of the fluid machinery. Furthermore, the above arrangement also allows for a smaller outer packaging box for the fluid machinery, reducing packaging costs.

[0087] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0088] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0089] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0090] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0091] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0092] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0093] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0094] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pump body assembly, characterized in that, Includes a liquid inlet section, the liquid inlet section comprising: Cylinder liner (10), the cylinder liner (10) having a liquid inlet channel (11); The liquid inlet pipe (20) has its first end inserted into the liquid inlet channel (11) and connected to the cylinder liner (10). A filter element (30), at least a portion of which is disposed in the liquid inlet channel (11) for filtering the refrigerant entering the cylinder liner (10) from the liquid inlet pipe (20); The liquid inlet channel (11) includes a first channel (111) and a second channel (112) connected sequentially from the outside to the inside. The inner diameter of the second channel (112) is smaller than the inner diameter of the first channel (111) to form a limiting step (113). The periphery of the filter element (30) abuts against the limiting step (113) and the first end of the liquid inlet pipe (20) is located in the first channel (111).

2. The pump body assembly according to claim 1, characterized in that, The liquid inlet section also includes a sealing element (40), which is disposed inside the liquid inlet pipe (20) and located at the first end of the liquid inlet pipe (20) for sealing the liquid inlet pipe (20) and the filter element (30).

3. The pump body assembly according to claim 1, characterized in that, The filter element (30) includes a circular frame (31) and a mesh (32), the circular frame (31) abutting against the limiting step (113), and at least a portion of the mesh (32) is located in the second channel (112).

4. The pump body assembly according to claim 3, characterized in that, The outer diameter D1 of the circular skeleton (31), the maximum outer diameter D2 of the mesh (32), the inner diameter DQ1 of the first channel (111), and the inner diameter DQ2 of the second channel (112) satisfy the following: D1≤DQ1; and / or D1>DQ2; and / or D2≤DQ2.

5. The pump body assembly according to claim 4, characterized in that, The outer diameter D1 of the circular skeleton (31) and the inner diameter DQ2 of the second channel (112) satisfy: D1>DQ2+2mm.

6. The pump body assembly according to claim 3, characterized in that, The cylinder liner (10) also has a liquid inlet buffer groove (12), which is connected to the second channel (112), and at least a portion of the mesh (32) is located in the liquid inlet buffer groove (12).

7. The pump body assembly according to claim 6, characterized in that, The axial length L1 of the mesh (32), the overall axial length LQ of the second channel (112) and the liquid inlet buffer tank (12) satisfy: L1 <LQ。 8. The pump body assembly according to claim 7, characterized in that, The axial length L1 of the mesh (32), the overall axial length LQ of the second channel (112) and the liquid inlet buffer tank (12) satisfy: L1 + 5mm <LQ。 9. A fluid machine, characterized in that, The pump body assembly includes any one of claims 1 to 8.

10. The fluid machinery according to claim 9, characterized in that, The fluid machinery is a fluorine pump.

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