Pump body assembly and fluid machine

Abstract

The invention provides a pump body assembly and a fluid machine. The pump body assembly comprises a liquid inlet part, and the liquid inlet part comprises a cylinder sleeve provided with a liquid inlet channel; the first end of the liquid inlet pipe extends into the liquid inlet channel and is connected with the cylinder sleeve; and at least one part of the filtering part is arranged in the liquid inlet channel, and the filtering part is used for filtering the refrigerant entering the cylinder sleeve from the liquid inlet pipe. The problem that in the prior art, a fluid machine is poor in applicability is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment, and in particular to a pump body component and a fluid machinery. Background Art

[0002] With the development of society, the power consumption of data centers is increasing year by year, resulting in huge power consumption. Computer room air conditioning is an important part of the data center, accounting for 40% of the power consumption of the data center. The application of its energy-saving technology is of great significance.

[0003] Computer room air conditioners are devices used to cool the electrical components of data centers. They need to cool continuously all year round to ensure that the indoor temperature can be maintained within a certain range. Most of the existing computer room air conditioners use compression refrigeration technology, and rely on compression refrigeration systems for cooling in both summer and winter. When the ambient temperature is high, the existing compression refrigeration technology can meet the performance and energy efficiency requirements; when the outdoor ambient temperature is significantly lower than the indoor temperature, the most economical and energy-saving refrigeration method is to use the low temperature outdoors to cool the indoor temperature. At this time, a liquid pump is used instead of a compressor to drive the refrigerant to run in the system, which has higher energy efficiency than conventional air conditioning systems. The industry calls this system that uses a pump to drive the refrigerant a fluorine pump system; the pump that drives the refrigerant is called a fluorine pump.

[0004] During the operation of the fluorine pump, various impurities will be generated and need to be filtered. The existing fluorine pumps are generally installed with a filter at the import, and the filter and the fluorine pump are sold together. Since the size of the fluorine pump with a filter is much larger than that of the fluorine pump without a filter, a larger space needs to be reserved for the installation of the fluorine pump, which makes it impossible to install the fluorine pump in a small and compact place. At the same time, the packaging size of the fluorine pump with an external filter is also relatively large, which increases the packaging cost.

[0005] It can be seen from the above that the prior art has the problem of poor applicability of fluid machinery. Summary of the invention

[0006] The main purpose of the present invention is to provide a pump body assembly and a fluid machine to solve the problem of poor applicability of the fluid machine in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a pump body assembly is provided, including a liquid inlet part, the liquid inlet part including: a cylinder sleeve, the cylinder sleeve having a liquid inlet channel; a liquid inlet pipe, the first end of the liquid inlet pipe extends into the liquid inlet channel and is connected to the cylinder sleeve; a filter element, at least a part of the filter element is arranged in the liquid inlet channel, and is used to filter the refrigerant entering the cylinder sleeve through the liquid inlet pipe.

[0008] Furthermore, the liquid inlet channel includes a first channel and a second channel connected in sequence from outside to inside, the inner diameter of the second channel is smaller than the inner diameter of the first channel to form a limit step, the periphery of the filter element abuts against the limit step, and the first end of the liquid inlet pipe is located in the first channel.

[0009] Furthermore, the liquid inlet portion further comprises a sealing element, which is arranged in the liquid inlet pipe and located at the first end of the liquid inlet pipe, and is used for sealing the liquid inlet pipe and the filter element.

[0010] Furthermore, the filter element includes a circular ring frame and a mesh body, the circular ring frame abuts against the limiting step to stop, and at least a portion of the mesh body is located in the second channel.

[0011] Furthermore, the outer diameter D1 of the annular skeleton, the maximum outer diameter D2 of the mesh body, 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.

[0012] Furthermore, the outer diameter D1 of the annular skeleton and the inner diameter DQ2 of the second channel satisfy: D1>DQ2+2mm.

[0013] Furthermore, the cylinder sleeve also has a liquid inlet buffer groove, which is communicated with the second channel, and at least a part of the mesh body is located in the liquid inlet buffer groove.

[0014] Furthermore, the axial length L1 of the mesh body, the overall axial length LQ of the second channel and the liquid inlet buffer tank satisfy: L1 <LQ。

[0015] Furthermore, the axial length L1 of the mesh body, the overall axial length LQ of the second channel and the liquid inlet buffer tank satisfy: L1+5mm <LQ。

[0016] 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 the inner diameter of the first channel to form a limit step, the liquid inlet part also includes a sealing member, the sealing member is arranged at the first end of the liquid inlet pipe and at least a portion of the sealing member is located in the liquid inlet pipe, the filter element is connected to the sealing member, the first end of the liquid inlet pipe and the sealing member abut against the limit step, and at least a portion of the filter element is located in the second channel.

[0017] Furthermore, the sealing element comprises a first section, a first reduced diameter section and a second section connected in sequence, the first section is located in the liquid inlet pipe, the first reduced diameter section abuts against the limiting step to limit the position, and the second section is located in the second channel and connected to the filter element.

[0018] Furthermore, the outer diameter D3 of the second section and the inner diameter DQ2 of the second channel satisfy: D3 <DQ2-0.1mm。

[0019] Furthermore, the cylinder sleeve also has a liquid inlet buffer groove, which is connected to the second channel, at least a portion of the filter is located in the liquid inlet buffer groove, and the overall axial length L2 of the second section and the filter, and the overall axial length LQ of the second channel and the liquid inlet buffer groove satisfy: L2 <LQ。

[0020] 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 liquid inlet buffer tank satisfy: L2+5mm <LQ。

[0021] 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 the inner diameter of the first channel to form a limit step, the filter element is connected to the first end of the liquid inlet pipe, the first end of the liquid inlet pipe abuts against the limit step to form a stopper, and at least a portion of the filter element is located in the second channel.

[0022] 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 the limiting step to limit the position, and the fourth section is located in the second channel and connected to the filter element.

[0023] Furthermore, the liquid inlet portion also includes a sealing member, which is arranged in the third section and is used to seal the liquid inlet pipe and the filter element.

[0024] Furthermore, the outer diameter D4 of the fourth section and the inner diameter DQ2 of the second channel satisfy: D4 <DQ2-0.1mm。

[0025] Furthermore, the cylinder sleeve further comprises a liquid inlet buffer groove, the liquid inlet buffer groove is communicated with the second channel, at least a portion of the filter element is located in the liquid inlet buffer groove, and 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 liquid inlet buffer groove satisfy: L3 <LQ。

[0026] 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 liquid inlet buffer tank satisfy: L3+5mm <LQ。

[0027] According to another aspect of the present invention, a fluid machine is provided, comprising the above-mentioned pump body assembly.

[0028] Furthermore, the fluid machinery is a fluorine pump.

[0029] According to the technical solution of the present invention, the pump body assembly includes a liquid inlet part, which includes a cylinder sleeve, a liquid inlet pipe and a filter element. The cylinder sleeve has a liquid inlet channel, and the first end of the liquid inlet pipe extends into the liquid inlet channel and is connected to the cylinder sleeve. At least a part of the filter element is arranged in the liquid inlet channel for filtering the refrigerant entering the cylinder sleeve through the liquid inlet pipe. In this way, by reasonably setting the internal structure of the pump body assembly, the filter element is set inside, which can better filter impurities and make the structure of the pump body assembly more compact, so that the fluid machinery with the pump body assembly can be installed in small and compact places, which greatly improves the applicability of the fluid machinery and solves the problem of poor applicability of the fluid machinery in the prior art. In addition, through the above-mentioned setting, the volume of the outer packaging box of the fluid machinery can be made smaller, reducing the packaging cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 A schematic structural diagram of a pump assembly in Embodiment 1 of the present invention is shown;

[0032] Figure 2 A cross-sectional view of a pump assembly in Embodiment 1 of the present invention is shown;

[0033] Figure 3 An exploded view of a pump assembly in Embodiment 1 of the present invention is shown;

[0034] Figure 4 A schematic diagram showing the structure of the filter element in the first embodiment of the present invention is shown;

[0035] Figure 5 A schematic diagram showing the size parameters of the pump body assembly in the first embodiment of the present invention is shown;

[0036] Figure 6 A cross-sectional view of a pump assembly in a second embodiment of the present invention is shown;

[0037] Figure 7 A schematic diagram showing the structure of the filter element and the sealing element in the second embodiment of the present invention is shown;

[0038] Figure 8 A schematic diagram showing the size parameters of a pump assembly in a second embodiment of the present invention is shown;

[0039] Fig. 9 A cross-sectional view of a pump assembly in Embodiment 3 of the present invention is shown;

[0040] Fig.10 A schematic diagram showing the structure of the filter element and the liquid inlet pipe in the third embodiment of the present invention is shown;

[0041] Fig.11 A schematic diagram showing the size parameters of a pump assembly in Embodiment 3 of the present invention is shown;

[0042] Fig.12 A schematic diagram of the structure of a fluid machine in a specific embodiment of the present invention is shown;

[0043] Fig.13 Shows Fig.12 Cross-sectional view at AA in the middle.

[0044] The above drawings include the following reference numerals:

[0045] 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 discharge channel; 20. Liquid inlet pipe; 21. Third section; 22. Second reduced diameter section; 23. Fourth section; 30. Filter element; 31. Ring skeleton; 32. Mesh body; 33. Spiral skeleton; 40. Seal element; 41. First section; 42. First reduced diameter section; 43. Second section; 50. Flange; 60. Crankshaft; 70. Piston assembly; 80. Housing; 81. Liquid inlet; 82. Liquid discharge; 90. Motor assembly. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In order to solve the problem of poor applicability of fluid machinery in the prior art, the present invention provides a pump body assembly and a fluid machinery, wherein the fluid machinery described below includes the pump body assembly described below.

[0048] Embodiment 1

[0049] like Figures 1 to 5 ,as well as Fig.13As shown, the pump body assembly includes a liquid inlet portion, a liquid outlet portion, a crankshaft 60, a piston assembly 70 and two flanges 50. The liquid inlet portion includes a cylinder sleeve 10, a liquid inlet pipe 20 and a filter element 30. The refrigerant enters the variable volume chamber formed by the piston assembly 70 and the cylinder sleeve 10 through the liquid inlet pipe 20, is compressed under the drive of the crankshaft 60, and is discharged from the liquid outlet portion. The cylinder sleeve 10 has a liquid inlet channel 11. The first end of the liquid inlet pipe 20 extends into the liquid inlet channel 11 and is connected to the cylinder sleeve 10. At least a portion of the filter element 30 is arranged in the liquid inlet channel 11, and is used to filter the refrigerant entering the cylinder sleeve 10 from the liquid inlet pipe 20. It can be understood that the first end of the liquid inlet pipe 20 is an end close to the cylinder sleeve 10.

[0050] By setting the pump body assembly including a liquid inlet part, the liquid inlet part includes a cylinder sleeve 10, a liquid inlet pipe 20 and a filter 30, the cylinder sleeve 10 has a liquid inlet channel 11, the first end of the liquid inlet pipe 20 extends into the liquid inlet channel 11 and is connected to the cylinder sleeve 10, and at least a part of the filter 30 is arranged in the liquid inlet channel 11, which is used to filter the refrigerant entering the cylinder sleeve 10 from the liquid inlet pipe 20. In this way, by reasonably setting the internal structure of the pump body assembly, the filter 30 is set inside, which can better filter impurities and make the structure of the pump body assembly more compact, so that the fluid machinery with the pump body assembly can be installed in a small and compact space, which greatly improves the applicability of the fluid machinery. In addition, through the above-mentioned setting, the volume of the outer packaging box of the fluid machinery can be made smaller, reducing the packaging cost.

[0051] like Figure 3 and Figure 5 As shown, the liquid inlet channel 11 includes a first channel 111 and a second channel 112 which are connected in sequence from outside to inside, and 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 in the first channel 111.

[0052] like Figures 1 to 3 As shown, the liquid inlet portion further includes a sealing member 40. The sealing member 40 is disposed in 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 member 30.

[0053] In this embodiment, the sealing member 40 is an annular sealing ring with a peripheral edge folded inward at one end. The end with the folded peripheral edge abuts against the filter element 30. The sealing ring can be made of rubber.

[0054] like Figure 4 As shown, the filter element 30 includes a circular ring frame 31 and a mesh body 32. The circular ring frame 31 abuts against the limiting step 113 to stop, and at least a portion of the mesh body 32 is located in the second channel 112.

[0055] Further, such as Figure 4 As shown, the filter element 30 further includes a spiral skeleton 33, which is disposed on the mesh body 32 and one end of which 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.

[0056] Specifically, during assembly, the filter 30 is first placed into the liquid inlet channel 11 of the cylinder sleeve 10, the annular frame 31 of the filter 30 is fitted with the limiting step 113 of the liquid inlet channel 11, and then the liquid inlet pipe 20 is installed, and finally the seal 40 is knocked into the liquid inlet pipe 20. The liquid inlet pipe 20 and the liquid inlet channel 11 are interference fit in the radial direction, and the seal 40 squeezes the liquid inlet pipe 20 and the liquid inlet channel 11 tightly together in the radial direction to achieve a sealing effect. When the seal 40 is squeezed into the liquid inlet channel 11 along the axial direction of the liquid inlet channel 11, the seal 40 not only achieves sealing but also squeezes the circular skeleton 31 of the filter element 30 along the axial direction of the liquid inlet channel 11, so that the circular skeleton 31 and the limiting step 113 of the liquid inlet channel 11 are tightly combined together, so that the circular skeleton 31 of the filter element 30 can be firm and will not shake. At the same time, the circular skeleton 31 fits closely with the limiting step 113, so that the fluid can only flow through the mesh body 32, preventing impurities in the fluid from leaking from the circular skeleton 31 into the interior of the pump body assembly.

[0057] like Figure 5 As shown, 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: D1≤DQ1; and / or D1>DQ2; and / or D2≤DQ2. It can be understood that the mesh 32 in this embodiment gradually decreases in diameter from the direction away from the circular skeleton 31, so the maximum outer diameter D2 of the mesh 32 is the outer diameter at one end close to the circular skeleton 31.

[0058] Further preferably, the outer diameter D1 of the annular skeleton 31 and the inner diameter DQ2 of the second channel 112 satisfy: D1>DQ2+2mm.

[0059] 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 body 32 is located in the liquid inlet buffer groove 12. Further, the cylinder liner 10 also has a liquid inlet groove 13, and there are two liquid inlet grooves 13, and the two liquid inlet grooves 13 are respectively 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 wall surfaces of the cylinder liner 10.

[0060] like Figures 1 to 3 , Figure 5As shown, the cylinder liner 10 further has a liquid discharge channel 14 which penetrates through 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.

[0061] 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 filtering area, but it cannot contact the inner side wall of the liquid inlet buffer groove 12 to prevent damage to the filter element 30.

[0062] 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.

[0063] As Figure 12 to Figure 13 shown, the present application also provides a fluid machine, including the above-mentioned pump body assembly. Further, the fluid machine further 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 communicated with 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.

[0064] 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 which are sequentially arranged along the axial direction of the crankshaft 60, and 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, the two eccentric parts correspondingly extend into the two through holes of the two pistons, and 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 pistons to reciprocate in the limiting channels, it interacts with the piston sleeve to make the piston sleeve and the piston rotate in the cylinder liner 10.

[0065] In this embodiment, the fluid machine is a fluorine pump.

[0066] Embodiment Two

[0067] The difference between this embodiment and Embodiment One is that the setting form of the filter element is different.

[0068] In this embodiment, as Figures 6 to 8As shown, the sealing member 40 is disposed at the first end of the liquid inlet pipe 20 and at least a portion thereof is located in the liquid inlet pipe 20. The filter 30 is connected to the sealing member 40, the first end of the liquid inlet pipe 20 and the sealing member 40 abut against the limit step 113, and at least a portion of the filter 30 is located in the second channel 112.

[0069] That is to say, the filter element 30 in this embodiment is not provided separately, but is provided integrally with the sealing element 40 .

[0070] like Figure 7 As shown, the sealing member 40 includes a first section 41, a first diameter reduction section 42 and a second section 43 connected in sequence. The first section 41 is located in the liquid inlet pipe 20, the first diameter reduction section 42 abuts against the limiting step 113 to limit the position, and the second section 43 is located in the second channel 112 and connected to the filter 30.

[0071] Specifically, during assembly, the liquid inlet pipe 20 is first inserted into the liquid inlet channel 11, and then the seal 40 with the filter element 30 is clamped in the installation position. Since the seal 40, the liquid inlet pipe 20 and the liquid inlet channel 11 are interference fit, the seal 40 needs to be knocked and squeezed to be installed in the liquid inlet channel 11, and the filter element 30 is fixed in the liquid inlet channel 11 together with the seal 40.

[0072] In this embodiment, the inner circumferential surface of one end of the seal 40 has an annular groove, and one end of the filter 30 has a matching clamping ring, which extends into the seal 40 and engages with the annular groove, thereby achieving the connection and fixation between the seal 40 and the filter 30.

[0073] like Figure 8 As shown, the outer diameter D3 of the second section 43 and the inner diameter DQ2 of the second channel 112 satisfy: D3 <DQ2-0.1mm。

[0074] 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。

[0075] Further 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。

[0076] Embodiment 3

[0077] The difference between this embodiment and the first embodiment is that the filter element is arranged in a different manner.

[0078] In this embodiment, if 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 limit step 113 , and at least a portion of the filter element 30 is located in the second channel 112 .

[0079] That is to say, the filter element 30 in this embodiment is not provided separately, but is provided integrally with the liquid inlet pipe 20 .

[0080] like Fig.10 As shown, the first end of the liquid 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 in the first channel 111, the second reduced diameter section 22 is abutted against the limiting step 113 for limiting, and the fourth section 23 is located in the second channel 112 and connected to the filter element 30. Further, the sealing member 40 is disposed in the third section 21 for sealing the liquid inlet pipe 20 and the filter element 30.

[0081] Specifically, during assembly, the liquid inlet pipe 20 with the filter 30 is first inserted into the liquid inlet channel 11, and then the seal 40 is squeezed into the liquid inlet pipe 20 by knocking or the like. Due to the interference fit, after the seal 40 is squeezed in, the liquid inlet pipe 20 is tightly pressed against the inner wall surface of the liquid inlet channel 11. At the same time, the seal 40 squeezes the second reduced diameter section 22 of the liquid inlet pipe 20 toward the limiting step 113 of the liquid inlet channel 11, making it in close contact. The filter 30 is fixed in the liquid inlet channel 11 together with the liquid inlet pipe 20.

[0082] like Fig.11 As shown, the outer diameter D4 of the fourth section 23 and the inner diameter DQ2 of the second channel 112 satisfy: D4 <DQ2-0.1mm。

[0083] like Fig.11 As shown, 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 <LQ。

[0084] Further 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。

[0085] From the above description, it can be seen that the above embodiment of the present invention achieves the following technical effects: by setting the pump body assembly including the liquid inlet part, the liquid inlet part includes the cylinder sleeve 10, the liquid inlet pipe 20 and the filter 30, the cylinder sleeve 10 has a liquid inlet channel 11, the first end of the liquid inlet pipe 20 extends into the liquid inlet channel 11 and is connected to the cylinder sleeve 10, at least a part of the filter 30 is arranged in the liquid inlet channel 11, and is used to filter the refrigerant entering the cylinder sleeve 10 from the liquid inlet pipe 20, so that by reasonably setting the internal structure of the pump body assembly, the filter 30 is set inside, and while being able to better filter impurities, the structure of the pump body assembly is made more compact, so that the fluid machinery with the pump body assembly can be installed in a small and compact space, which greatly improves the applicability of the fluid machinery. In addition, through the above setting, the volume of the outer packaging box of the fluid machinery can also be made smaller, reducing the packaging cost.

[0086] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0087] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0088] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0089] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0090] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0091] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0092] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0093] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pump assembly, characterized in that: The invention comprises a liquid inlet portion, wherein the liquid inlet portion comprises: A cylinder liner (10), wherein the cylinder liner (10) has a liquid inlet channel (11); a liquid inlet pipe (20), wherein a first end of the liquid inlet pipe (20) extends into the liquid inlet channel (11) and is connected to the cylinder sleeve (10); A filter element (30), at least a portion of which is disposed in the liquid inlet channel (11) and is used to filter the refrigerant entering the cylinder sleeve (10) from the liquid inlet pipe (20).

2. The pump assembly according to claim 1, characterized in that: The liquid inlet channel (11) comprises a first channel (111) and a second channel (112) which are connected in sequence from outside to 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) to form a stop, and the first end of the liquid inlet pipe (20) is located in the first channel (111).

3. The pump assembly according to claim 2, characterized in that: The liquid inlet portion further comprises a sealing element (40), which is arranged in 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).

4. The pump assembly according to claim 2, characterized in that: The filter element (30) comprises a circular ring frame (31) and a mesh body (32); the circular ring frame (31) abuts against the limiting step (113) to form a stop; and at least a portion of the mesh body (32) is located in the second channel (112).

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

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

7. The pump assembly according to claim 4, characterized in that: The cylinder sleeve (10) further comprises a liquid inlet buffer groove (12), the liquid inlet buffer groove (12) being in communication with the second channel (112), and at least a portion of the mesh body (32) is located in the liquid inlet buffer groove (12).

8. The pump assembly according to claim 7, characterized in that: The axial length L1 of the mesh body (32), the second channel (112) and the overall axial length LQ of the liquid inlet buffer tank (12) satisfy: L1 <LQ。 9. The pump assembly according to claim 8, characterized in that: The axial length L1 of the mesh body (32), the overall axial length LQ of the second channel (112) and the liquid inlet buffer tank (12) satisfy: L1+5mm <LQ。 10. The pump assembly according to claim 1, characterized in that: The liquid inlet channel (11) comprises a first channel (111) and a second channel (112) which are connected in sequence 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 liquid inlet portion further comprises a sealing member (40), the sealing member (40) is arranged at the first end of the liquid inlet pipe (20) and at least a part of it is located in the liquid inlet pipe (20), the filter element (30) is connected to the sealing member (40), the first end of the liquid inlet pipe (20) and the sealing member (40) are in contact with the limiting step (113) to form a stopper, and at least a part of the filter element (30) is located in the second channel (112).

11. The pump assembly according to claim 10, characterized in that: The sealing element (40) comprises a first section (41), a first reduced diameter section (42) and a second section (43) which are connected in sequence, wherein the first section (41) is located in the liquid inlet pipe (20), the first reduced diameter section (42) abuts against the limiting step (113) for limiting position, and the second section (43) is located in the second channel (112) and connected to the filter element (30).

12. The pump assembly according to claim 11, characterized in that The outer diameter D3 of the second section (43) and the inner diameter DQ2 of the second channel (112) satisfy: D3 <DQ2-0.1mm。 13. The pump assembly according to claim 11, characterized in that The cylinder sleeve (10) further comprises a liquid inlet buffer groove (12), the liquid inlet buffer groove (12) being in communication with the second channel (112), at least a portion of the filter element (30) being located in the liquid inlet buffer groove (12), and an overall axial length L2 of the second section (43) and the filter element (30), and an overall axial length LQ of the second channel (112) and the liquid inlet buffer groove (12) satisfying: L2 <LQ。 14. The pump assembly according to claim 13, characterized in that: 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。 15. The pump assembly according to claim 1, characterized in that The liquid inlet channel (11) comprises a first channel (111) and a second channel (112) which are connected in sequence from outside to 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 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) to form a stop, and at least a portion of the filter element (30) is located in the second channel (112).

16. The pump assembly according to claim 15, characterized in that The first end of the liquid inlet pipe (20) comprises a third section (21), a second reduced diameter section (22) and a fourth section (23) which are connected in sequence; the third section (21) is located in the first channel (111); the second reduced diameter section (22) abuts against the limiting step (113) for limiting position; and the fourth section (23) is located in the second channel (112) and is connected to the filter element (30).

17. The pump assembly according to claim 16, characterized in that The liquid inlet portion further comprises a sealing element (40), wherein the sealing element (40) is arranged in the third section (21) and is used for sealing the liquid inlet pipe (20) and the filter element (30).

18. The pump assembly according to claim 16, characterized in that The outer diameter D4 of the fourth section (23) and the inner diameter DQ2 of the second channel (112) satisfy: D4 <DQ2-0.1mm。 19. The pump assembly according to claim 16, characterized in that The cylinder sleeve (10) further comprises a liquid inlet buffer groove (12). The liquid inlet buffer groove (12) is in communication with the second channel (112), at least a portion of the filter element (30) is located in the liquid inlet buffer groove (12), and an overall axial length L3 of the fourth section (23) and the filter element (30), and an overall axial length LQ of the second channel (112) and the liquid inlet buffer groove (12) satisfy: L3 <LQ。 20. The pump assembly according to claim 19, characterized in that 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 groove (12) satisfy: L3+5mm <LQ。 21. A fluid machine, characterized in that: A pump body assembly comprising any one of claims 1 to 20.

22. The fluid machine according to claim 21, characterized in that: The fluid machinery is a fluorine pump.

Images