Pump body assembly, rotary cylinder pump and heat exchange equipment

Abstract

The utility model provides a pump body assembly, a rotary cylinder pump and heat exchange equipment, the pump body assembly comprises a rotating shaft, a cylinder sleeve, a piston assembly and two flanges, the rotating shaft and the cylinder sleeve are eccentrically arranged, and the eccentric distance is fixed; the piston assembly is provided with a variable volume cavity and is rotatably arranged in the cylinder sleeve, and the rotating shaft and the piston assembly are in driving connection with the variable volume cavity; a liquid suction port and a liquid discharge port are formed in the cylinder sleeve; the two flanges are arranged at the two axial ends of the cylinder sleeve correspondingly. The number of the liquid outlets is two, and the two liquid outlets are arranged in the axial direction of the cylinder sleeve in a spaced mode. Wherein at least one of the two liquid discharging ports penetrates through the axial end face of the cylinder sleeve, a liquid discharging channel is formed in the flange at least located on the side, penetrating through the axial end face of the cylinder sleeve, of the liquid discharging port, and the liquid discharging channel is used for being communicated with the liquid discharging port on the same side. The fluorine pump solves the problem that in the prior art, the discharge resistance of fluid in a cylinder sleeve of a fluorine pump is large, and the efficiency of the fluorine pump is not improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange systems, in particular to a pump body component, a rotary cylinder pump and a heat exchange device. Background Art

[0002] In data centers, computer room air conditioning and other fields, liquid pumps are usually used instead of compressors to drive the refrigerant in the air-conditioning system, and the energy efficiency is higher than that of conventional air-conditioning systems. The industry calls this system that uses a pump to drive the refrigerant a fluorine pump system, and the pump that drives the refrigerant is called a fluorine pump.

[0003] However, the resistance to discharge of the fluid in the cylinder sleeve of the existing fluorine pump is relatively large, which is not conducive to improving the efficiency of the fluorine pump. Utility Model Content

[0004] The main purpose of the utility model is to provide a pump body assembly, a rotary cylinder pump and a heat exchange device to solve the problem that the discharge resistance of the fluid in the cylinder sleeve of the fluorine pump in the prior art is relatively large, which is not conducive to improving the efficiency of the fluorine pump.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a pump body assembly is provided, including a rotating shaft, a cylinder sleeve, a piston assembly and two flanges, wherein the rotating shaft and the cylinder sleeve are eccentrically arranged and the eccentric distance is fixed; the piston assembly has a variable volume chamber, the piston assembly is rotatably arranged in the cylinder sleeve, and the rotating shaft is drivingly connected to the piston assembly to change the volume of the variable volume chamber; a suction port and a discharge port are arranged on the cylinder sleeve, the suction port is connected with the variable volume chamber and conveys refrigerant into the variable volume chamber, and the discharge port is connected with the variable volume chamber and discharges the refrigerant in the variable volume chamber from the discharge port; the two flanges are respectively arranged at the axial ends of the cylinder sleeve; there are two discharge ports, and the two discharge ports are arranged at intervals along the axial direction of the cylinder sleeve; wherein at least one of the two discharge ports passes through the axial end face of the cylinder sleeve, and a discharge channel is provided on at least one flange located on one side of the axial end face of the discharge port passing through the cylinder sleeve, and the discharge channel is used to communicate with the discharge port on the same side.

[0006] Further, the drainage channel extends along the axial direction of the flange.

[0007] Further, at least one of the two drain ports passes through the outer peripheral surface of the cylinder liner; or, at least one of the two drain ports does not pass through the outer peripheral surface of the cylinder liner.

[0008] Furthermore, a projection of the contour line of the drainage channel in the axial direction of the flange is one of a circle, a rectangle, an arc, and a special shape.

[0009] Furthermore, the projection of the contour line of the drainage channel in the axial direction of the flange is circular, and the channel diameter D1 of the drainage channel and the width W1 of the drainage port satisfy: D1≤W1.

[0010] Further, a projection of a contour line of the drain channel in the axial direction of the flange is located outside the inner circle of the cylinder liner; or, a portion of a projection of a contour line of the drain channel in the axial direction of the flange is located inside the inner circle of the cylinder liner, and another portion of a projection of a contour line of the drain channel in the axial direction of the flange is located outside the inner circle of the cylinder liner; or, a projection of a contour line of the drain channel in the axial direction of the flange is located inside the inner circle of the cylinder liner.

[0011] Further, when part of the projection of the contour line of the drain channel in the axial direction of the flange is located within the inner circle of the cylinder liner, or when the projection of the contour line of the drain channel in the axial direction of the flange is located within the inner circle of the cylinder liner, the projection of the contour line of the drain channel in the axial direction of the flange is located outside the contour line of the variable volume chamber.

[0012] Further, when a portion of the projection of the contour line of the drain channel in the axial direction of the flange is located within the inner circle of the cylinder liner, or when the projection of the contour line of the drain channel in the axial direction of the flange is located within the inner circle of the cylinder liner, the projection of the contour line of the drain channel in the axial direction of the flange is located outside the contour line of the axial hole on the flange, and there is a first preset distance L between the drain channel and the edge of the axial hole.

[0013] Further, a ratio of the first preset distance L to the hole diameter D2 of the shaft hole is L / D2>0.3.

[0014] Furthermore, the ratio of the height H2 of the connection between the two drain ports in the axial direction of the cylinder sleeve to the height H1 of the cylinder sleeve in the axial direction thereof is in the range of 0.1 to 0.5.

[0015] Furthermore, the ratio of the depth H3 of the upper drain port in the axial direction of the cylinder sleeve to the height H1 of the cylinder sleeve in the axial direction thereof is in the range of 0.1 to 0.4.

[0016] Furthermore, the ratio of the depth H4 of the lower drain port in the axial direction of the cylinder sleeve to the height H1 of the cylinder sleeve in the axial direction thereof is in the range of 0.1 to 0.4.

[0017] Furthermore, the rotating shaft is provided with two eccentric parts along its axial direction, and the piston assembly includes a piston sleeve and a piston, wherein the piston sleeve is rotatably arranged in the cylinder sleeve, and the piston sleeve has two limiting channels, and the two limiting channels are arranged in sequence along the axial direction of the rotating shaft, and the extension direction of the limiting channels is perpendicular to the axial direction of the rotating shaft; the piston has a through hole, and there are two pistons, and the two eccentric parts extend into the two through holes of the two pistons correspondingly, and the two pistons are correspondingly slidably arranged in the two limiting channels to form a variable volume chamber, and the variable volume chamber is located in the sliding direction of the piston, and the rotating shaft rotates to drive the piston to slide back and forth in the limiting channel while interacting with the piston sleeve, so that the piston sleeve and the piston rotate in the cylinder sleeve.

[0018] Furthermore, the height H2 of the connection between the two discharge ports in the axial direction of the cylinder sleeve is equal to the height H2 of the connection between the two limiting channels in the axial direction of the piston sleeve. q2 The ratio ranges from 0.9 to 3.

[0019] Furthermore, the height H2 of the connection between the two discharge ports in the axial direction of the cylinder sleeve is equal to the height H2 of the connection between the two limiting channels in the axial direction of the piston sleeve. q2 The ratio ranges from 1.1 to 1.2.

[0020] Furthermore, the width W1 of the discharge port and the length L of the channel wall of the limiting channel qc Satisfy between: W1≤L qc .

[0021] Furthermore, the width W1 of the discharge port and the length L of the channel wall of the limiting channel qc Between: L qc -The value range of W1 is 2 to 6 mm.

[0022] Furthermore, there is a phase difference of a first angle A between the two eccentric portions, the eccentricities of the two eccentric portions are equal, and there is a phase difference of a second angle B between the extension directions of the two limiting channels, wherein the first angle A is twice the second angle B.

[0023] Furthermore, the two eccentric portions are arranged opposite to each other at an angle of 180°.

[0024] According to another aspect of the utility model, a rotary cylinder pump is provided, comprising a pump body assembly, and the pump body assembly is the above-mentioned pump body assembly.

[0025] According to another aspect of the utility model, a heat exchange device is provided, including a rotary cylinder pump, and the rotary cylinder pump is the rotary cylinder pump mentioned above.

[0026] By applying the technical solution of the utility model, at least one of the two drain ports is passed through the axial end face of the cylinder liner, and at the same time, a drain channel is opened on at least one flange located on one side of the axial end face of the cylinder liner through which the drain port passes, and the drain channel is used to communicate with the drain port on the same side. In this way, the drain channel on the flange can assist in the discharge of the fluid, thereby helping to reduce the resistance in the fluid discharge process, and further helping to improve the efficiency of the rotary cylinder pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting 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 on the present invention. In the drawings:

[0028] Figure 1A schematic structural diagram of a pump assembly according to an optional embodiment of the utility model is shown;

[0029] Figure 2 Shows Figure 1 A schematic cross-sectional view of the pump assembly;

[0030] Figure 3 Shows Figure 1 The schematic diagram of the structure of the pump body assembly omitting the upper flange;

[0031] Figure 4 Shows Figure 3 A schematic diagram of the structure of the cylinder sleeve of the pump body assembly;

[0032] Figure 5 Shows Figure 1 A schematic diagram of the structure of the pump body assembly from a top view, in which it is shown that the outlines of the discharge passages are all located outside the inner circle of the cylinder sleeve;

[0033] Figure 6 Shows Figure 1 A schematic diagram of the structure of the pump body assembly from a top view, in which the outline of the discharge channel is shown to be located within the inner circle of the cylinder sleeve;

[0034] Figure 7 Shows Figure 1 A schematic diagram of the structure of the pump body assembly from a top view, in which it is shown that the outlines of the discharge passages are all located within the inner circle of the cylinder sleeve;

[0035] Figure 8 Shows Figure 6 , Figure 7 A schematic diagram of the positional relationship between the contour line of the discharge channel partially or entirely located within the inner circle of the cylinder sleeve, the contour line V of the variable volume chamber, and the flange shaft hole T;

[0036] Fig. 9 A schematic structural diagram of an upper flange of a pump assembly according to Embodiment 1 of the present utility model is shown;

[0037] Fig.10 A schematic structural diagram of an upper flange of a pump assembly according to a second embodiment of the present utility model is shown;

[0038] Fig.11 A schematic structural diagram of an upper flange of a pump body assembly according to Embodiment 3 of the present utility model is shown;

[0039] Fig.12 A schematic structural diagram of an upper flange of a pump body assembly according to a fourth embodiment of the present utility model is shown;

[0040] Fig.13A schematic structural diagram of a lower flange of a pump assembly according to Embodiment 1 of the present utility model is shown;

[0041] Fig.14 A schematic structural diagram of a lower flange of a pump assembly according to a second embodiment of the present utility model is shown;

[0042] Fig.15 A schematic structural diagram of a lower flange of a pump body assembly according to Embodiment 3 of the present utility model is shown;

[0043] Fig.16 A schematic structural diagram of a lower flange of a pump body assembly according to a fourth embodiment of the present utility model is shown;

[0044] Fig.17 A schematic structural diagram of a pump assembly according to a second embodiment of the present utility model is shown;

[0045] Fig.18 Shows Fig.17 A schematic cross-sectional view of the pump assembly;

[0046] Fig.19 Shows Fig.17 A schematic diagram of the structure of the cylinder sleeve of the pump body assembly;

[0047] Fig. 20 Shows Fig.19 A schematic diagram of the structure of the liquid suction port side of the cylinder sleeve;

[0048] Fig.21 Shows Fig. 20 A schematic diagram of the structure of the cylinder sleeve from a top view;

[0049] Fig. 22 Shows Fig.21 A schematic diagram of the structure from the Y perspective;

[0050] Fig.23 A schematic structural diagram of a piston sleeve of a pump body assembly according to an optional embodiment of the utility model is shown;

[0051] Fig.24 Shows Fig.23 A schematic cross-sectional structure diagram of the piston sleeve at a ZZ perspective;

[0052] Fig.25 Shows Fig.23 A schematic structural diagram of the piston sleeve from a top view.

[0053] The above drawings include the following reference numerals:

[0054] 10. Rotating shaft; 11. Eccentric part;

[0055] 20. Cylinder sleeve; 21. Liquid suction port; 22. Liquid discharge port; 23. Buffer tank; 24. Liquid suction tank;

[0056] 30. Piston assembly; 31. Piston sleeve; 311. Position limiting channel; 3111. Variable volume chamber; 32. Piston;

[0057] 40. Flange; 42. Upper flange; 43. Lower flange; 41. Drain channel; 411. Upper drain channel; 412. Lower drain channel. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0059] In order to solve the problem in the prior art that the resistance to the discharge of the fluid in the cylinder sleeve of the fluorine pump is large, which is not conducive to improving the efficiency of the fluorine pump, the utility model provides a pump body assembly, a rotary cylinder pump and a heat exchange device, wherein the rotary cylinder pump includes a pump body assembly, the pump body assembly is the above-mentioned and below-mentioned pump body assemblies, and the heat exchange device includes a rotary cylinder pump, and the rotary cylinder pump is the above-mentioned rotary cylinder pump.

[0060] Embodiment 1

[0061] like Figures 1 to 16 As shown, the pump body assembly includes a rotating shaft 10, a cylinder sleeve 20, a piston assembly 30 and two flanges 40, wherein the rotating shaft 10 and the cylinder sleeve 20 are eccentrically arranged and the eccentric distance is fixed; the piston assembly 30 has a variable volume chamber 3111, the piston assembly 30 is rotatably arranged in the cylinder sleeve 20, and the rotating shaft 10 is drivingly connected with the piston assembly 30 to change the volume of the variable volume chamber 3111; the cylinder sleeve 20 is provided with a suction port 21 and a discharge port 22, the suction port 21 is connected to the variable volume chamber 3111 and transports refrigerant into the variable volume chamber 3111, and the discharge port 22 The liquid port 22 is connected with the variable volume chamber 3111 and discharges the refrigerant in the variable volume chamber 3111 from the drain port 22; two flanges 40 are respectively arranged at the axial ends of the cylinder liner 20; there are two drain ports 22, and the two drain ports 22 are arranged at intervals along the axial direction of the cylinder liner 20; wherein, at least one of the two drain ports 22 passes through the axial end face of the cylinder liner 20, and a drain channel 41 is provided on at least the flange 40 located on one side of the axial end face where the drain port 22 passes through the cylinder liner 20, and the drain channel 41 is used to communicate with the drain port 22 on the same side.

[0062] At least one of the two drain ports 22 is passed through the axial end surface of the cylinder liner 20. At the same time, a drain channel 41 is opened on at least one side of the flange 40 located at the axial end surface where the drain port 22 passes through the cylinder liner 20. The drain channel 41 is used to communicate with the drain port 22 on the same side. In this way, the drain channel 41 on the flange 40 can assist in the discharge of the fluid, thereby helping to reduce the resistance in the fluid discharge process, and further helping to improve the efficiency of the rotary cylinder pump.

[0063] It should be noted that, in this embodiment, the drainage channel 41 extends along the axial direction of the flange 40 .

[0064] like Figure 4 As shown, a liquid suction groove 24 is provided on the inner wall surface of the cylinder sleeve 20 , and the cylinder sleeve 20 further has a buffer groove 23 , and the liquid suction groove 24 is connected with the liquid suction port 21 through the buffer groove 23 .

[0065] Optionally, at least one of the two drain ports 22 passes through the outer circumferential surface of the cylinder sleeve 20 .

[0066] Optionally, at least one of the two drain ports 22 does not penetrate the outer circumferential surface of the cylinder liner 20 .

[0067] It should be noted that, in the present embodiment, the two drain ports 22 both pass through the outer peripheral surface of the cylinder sleeve 20 .

[0068] It should be noted that, in the present embodiment, the projection of the contour line of the drainage channel 41 in the axial direction of the flange 40 is one of circular, rectangular, arc-shaped, and irregular.

[0069] It should be noted that, in this embodiment, the flange 40 includes an upper flange 42 and a lower flange 43, and the drainage channel 41 includes an upper drainage channel 411 and a lower drainage channel 412, wherein the upper flange 42 is provided with an upper drainage channel 411, and the lower flange 43 is provided with a lower drainage channel 412.

[0070] like Figure 7 As shown, letter Q represents the geometric center of the cylinder sleeve 20 , letter M represents the geometric center of the shaft body of the rotating shaft 10 , and letter U represents the geometric center of the eccentric portion 11 .

[0071] like Figures 9 to 12 As shown, the projection of the contour line of the upper liquid discharge channel 411 in the axial direction of the upper flange 42 is one of circular, rectangular, arc-shaped, and irregular.

[0072] like Figures 13 to 16 As shown, the projection of the contour line of the lower drainage channel 412 in the axial direction of the lower flange 43 is one of circular, rectangular, arc-shaped, and irregular.

[0073] Optionally, the projection of the outline of the drainage channel 41 in the axial direction of the flange 40 is circular, and the channel diameter D1 of the drainage channel 41 and the width W1 of the drainage port 22 satisfy: D1≤W1 (see Fig.21 shown).

[0074] like Figure 5 As shown, a projection of the contour line of the drain channel 41 in the axial direction of the flange 40 is located outside the inner circle of the cylinder liner 20 .

[0075] like Figure 6 As shown, part of the contour line projection of the drain channel 41 in the axial direction of the flange 40 is located within the inner circle of the cylinder liner 20 , and another part of the contour line projection of the drain channel 41 in the axial direction of the flange 40 is located outside the inner circle of the cylinder liner 20 .

[0076] like Figure 7 As shown, the contour line projection of the drain channel 41 in the axial direction of the flange 40 is located within the inner circle of the cylinder liner 20 .

[0077] like Figure 8 As shown, when the portion of the contour line projection of the drain channel 41 in the axial direction of the flange 40 is located within the inner circle of the cylinder liner 20, or, when the contour line projection of the drain channel 41 in the axial direction of the flange 40 is located within the inner circle of the cylinder liner 20, the contour line projection of the drain channel 41 in the axial direction of the flange 40 is located outside the contour line of the variable volume chamber 3111.

[0078] like Figure 8 As shown, when the portion of the contour line projection of the drain channel 41 in the axial direction of the flange 40 is located within the inner circle of the cylinder liner 20, or when the contour line projection of the drain channel 41 in the axial direction of the flange 40 is located within the inner circle of the cylinder liner 20, the contour line projection of the drain channel 41 in the axial direction of the flange 40 is located outside the contour line of the axial hole on the flange 40, and there is a first preset distance L between the drain channel 41 and the edge of the axial hole.

[0079] It should be noted that, in this embodiment, the ratio of the first preset distance L to the hole diameter D2 of the shaft hole is L / D2>0.3.

[0080] like Fig. 22 As shown, the ratio of the height H2 of the connection between the two drain ports 22 in the axial direction of the cylinder sleeve 20 to the height H1 of the cylinder sleeve 20 in the axial direction thereof is in the range of 0.1 to 0.5.

[0081] like Fig. 22 As shown, the ratio of the depth H3 of the upper drain port 22 in the axial direction of the cylinder sleeve 20 to the height H1 of the cylinder sleeve 20 in the axial direction thereof is in the range of 0.1 to 0.4.

[0082] like Fig. 22 As shown, the ratio of the depth H4 of the lower drain port 22 in the axial direction of the cylinder sleeve 20 to the height H1 of the cylinder sleeve 20 in the axial direction thereof is in the range of 0.1 to 0.4.

[0083] like Figure 23 to Figure 25 As shown, the rotating shaft 10 is provided with two eccentric parts 11 along its axial direction, and the piston assembly 30 includes a piston sleeve 31 and a piston 32, wherein the piston sleeve 31 is rotatably arranged in the cylinder sleeve 20, and the piston sleeve 31 has two limiting channels 311, and the two limiting channels 311 are sequentially arranged along the axial direction of the rotating shaft 10, and the extension direction of the limiting channels 311 is perpendicular to the axial direction of the rotating shaft 10; the piston 32 has a through hole, and there are two pistons 32. The two eccentric parts 11 extend into the two through holes of the two pistons 32 respectively, and the two pistons 32 are correspondingly slidably arranged in the two limiting channels 311 and form a variable volume chamber 3111, and the variable volume chamber 3111 is located in the sliding direction of the piston 32. The rotating shaft 10 rotates to drive the piston 32 to slide back and forth in the limiting channel 311 while interacting with the piston sleeve 31, so that the piston sleeve 31 and the piston 32 rotate in the cylinder sleeve 20.

[0084] like Fig. 22 and Fig.24 As shown, the height H2 of the connection between the two discharge ports 22 in the axial direction of the cylinder sleeve 20 is greater than the height H2 of the connection between the two limiting channels 311 in the axial direction of the piston sleeve 31. q2 The ratio ranges from 0.9 to 3.

[0085] like Fig. 22 and Fig.25 As shown, the height H2 of the connection between the two discharge ports 22 in the axial direction of the cylinder sleeve 20 is greater than the height H2 of the connection between the two limiting channels 311 in the axial direction of the piston sleeve 31. q2 The ratio ranges from 1.1 to 1.2.

[0086] like Fig.21 and Fig.25 As shown, the width W1 of the discharge port 22 and the length L of the channel wall of the limiting channel 311 are qc Satisfy between: W1≤L qc .

[0087] Preferably, the width W1 of the drain port 22 and the length L of the channel wall of the limiting channel 311 are qc Between: L qc -The value range of W1 is 2 to 6 mm.

[0088] It should be noted that in the present application, there is a phase difference of a first angle A between the two eccentric portions 11, the eccentricity of the two eccentric portions 11 is equal, and there is a phase difference of a second angle B between the extension directions of the two limiting channels 311, wherein the first angle A is twice the second angle B.

[0089] Preferably, the two eccentric portions 11 are arranged opposite to each other at an angle of 180°.

[0090] Embodiment 2

[0091] It should be noted that the difference between this embodiment and the first embodiment is that Figures 17 to 22 As shown, the two drain ports 22 do not penetrate the outer circumferential surface of the cylinder liner 20 .

[0092] 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.

[0093] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. 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 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 one drawing, it does not need to be further discussed in subsequent drawings.

[0094] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here 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" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0095] 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.

[0096] 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.

[0097] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pump assembly, characterized in that: include: A rotating shaft (10); The cylinder sleeve (20), the rotating shaft (10) and the cylinder sleeve (20) are eccentrically arranged with a fixed eccentric distance; A piston assembly (30), the piston assembly (30) having a variable volume chamber (3111), the piston assembly (30) being rotatably disposed in the cylinder sleeve (20), and the rotating shaft (10) being drivingly connected to the piston assembly (30) to change the volume of the variable volume chamber (3111); The cylinder sleeve (20) is provided with a liquid suction port (21) and a liquid discharge port (22); the liquid suction port (21) is in communication with the variable volume chamber (3111) and delivers refrigerant into the variable volume chamber (3111); the liquid discharge port (22) is in communication with the variable volume chamber (3111) and discharges the refrigerant in the variable volume chamber (3111) through the liquid discharge port (22); Two flanges (40), the two flanges (40) being respectively arranged at two axial ends of the cylinder sleeve (20); There are two drainage ports (22), and the two drainage ports (22) are spaced apart along the axial direction of the cylinder sleeve (20); At least one of the two drainage ports (22) passes through the axial end surface of the cylinder liner (20), and a drainage channel (41) is provided on at least one side of the flange (40) located at the side where the drainage port (22) passes through the axial end surface of the cylinder liner (20), and the drainage channel (41) is used to communicate with the drainage port (22) on the same side.

2. The pump assembly according to claim 1, characterized in that: The drainage channel (41) extends along the axial direction of the flange (40).

3. The pump assembly according to claim 1, characterized in that: At least one of the two drainage ports (22) passes through the outer peripheral surface of the cylinder sleeve (20); or, At least one of the two drainage ports (22) does not penetrate the outer peripheral surface of the cylinder sleeve (20).

4. The pump assembly according to claim 1, characterized in that: The projection of the contour line of the drainage channel (41) in the axial direction of the flange (40) is one of a circle, a rectangle, an arc, and a special shape.

5. The pump assembly according to claim 1, characterized in that: The projection of the contour line of the drainage channel (41) in the axial direction of the flange (40) is circular, and the channel diameter D1 of the drainage channel (41) and the width W1 of the drainage port (22) satisfy the following relationship: D1≤W1.

6. The pump assembly according to claim 1, characterized in that: The projection of the contour line of the drainage channel (41) in the axial direction of the flange (40) is located outside the inner circle of the cylinder sleeve (20); or, A portion of a projection of a contour line of the drainage channel (41) in the axial direction of the flange (40) is located within the inner circle of the cylinder liner (20), and another portion of a projection of a contour line of the drainage channel (41) in the axial direction of the flange (40) is located outside the inner circle of the cylinder liner (20); or, The projection of the contour line of the drainage channel (41) in the axial direction of the flange (40) is located within the inner circle of the cylinder sleeve (20).

7. The pump assembly according to claim 1, characterized in that: When the portion of the projection of the contour line of the drainage channel (41) on the axial direction of the flange (40) is located within the inner circle of the cylinder liner (20), or when the projection of the contour line of the drainage channel (41) on the axial direction of the flange (40) is located within the inner circle of the cylinder liner (20), the projection of the contour line of the drainage channel (41) on the axial direction of the flange (40) is located outside the contour line of the variable volume chamber (3111).

8. The pump assembly according to claim 1, characterized in that: When a portion of a projection of the contour line of the drainage channel (41) in the axial direction of the flange (40) is located within the inner circle of the cylinder liner (20), or when a projection of the contour line of the drainage channel (41) in the axial direction of the flange (40) is located within the inner circle of the cylinder liner (20), a projection of the contour line of the drainage channel (41) in the axial direction of the flange (40) is located outside the contour line of the axial hole on the flange (40), and a first preset distance L is present between the drainage channel (41) and the edge of the axial hole.

9. The pump assembly according to claim 8, characterized in that: A ratio of the first preset distance L to a hole diameter D2 of the axial hole is L / D2>0.

3.

10. The pump assembly according to claim 1, characterized in that: The ratio of the height H2 of the connection between the two drainage ports (22) in the axial direction of the cylinder sleeve (20) to the height H1 of the cylinder sleeve (20) in the axial direction thereof is in the range of 0.1 to 0.

5.

11. The pump assembly according to claim 1, characterized in that: The ratio of the depth H3 of the upper discharge port (22) in the axial direction of the cylinder sleeve (20) to the height H1 of the cylinder sleeve (20) in the axial direction thereof is in the range of 0.1 to 0.

4.

12. The pump assembly according to claim 1, characterized in that: The ratio of the depth H4 of the drainage port (22) located at the bottom in the axial direction of the cylinder sleeve (20) to the height H1 of the cylinder sleeve (20) in the axial direction thereof is in the range of 0.1 to 0.

4.

13. The pump assembly according to any one of claims 1 to 12, characterized in that: The rotating shaft (10) is provided with two eccentric parts (11) along its axial direction, and the piston assembly (30) comprises: A piston sleeve (31), the piston sleeve (31) being rotatably disposed in the cylinder sleeve (20), the piston sleeve (31) having two limiting channels (311), the two limiting channels (311) being sequentially disposed along the axial direction of the rotating shaft (10), and the extending direction of the limiting channels (311) being perpendicular to the axial direction of the rotating shaft (10); A piston (32), wherein the piston (32) has a through hole, and there are two pistons (32). The two eccentric parts (11) extend into the two through holes of the two pistons (32) respectively. The two pistons (32) are slidably arranged in the two limiting channels (311) and form the variable volume chamber (3111). The variable volume chamber (3111) is located in the sliding direction of the piston (32). The rotating shaft (10) rotates to drive the piston (32) to slide back and forth in the limiting channel (311) and interacts with the piston sleeve (31) so that the piston sleeve (31) and the piston (32) rotate in the cylinder sleeve (20).

14. The pump assembly according to claim 13, characterized in that: The height H2 of the connection between the two drainage ports (22) in the axial direction of the cylinder sleeve (20) and the height H2 of the connection between the two limiting channels (311) in the axial direction of the piston sleeve (31) are equal to the height H q2 The ratio ranges from 0.9 to 3.

15. The pump assembly according to claim 14, characterized in that The height H2 of the connection between the two drainage ports (22) in the axial direction of the cylinder sleeve (20) and the height H2 of the connection between the two limiting channels (311) in the axial direction of the piston sleeve (31) are equal to the height H q2 The ratio ranges from 1.1 to 1.

2.

16. The pump assembly according to claim 13, characterized in that The width W1 of the liquid discharge port (22) and the length L of the channel wall of the limiting channel (311) qc Satisfy between: W1≤L qc .

17. The pump assembly according to claim 13, characterized in that The width W1 of the liquid discharge port (22) and the length L of the channel wall of the limiting channel (311) qc Between: L qc -The value range of W1 is 2 to 6 mm.

18. The pump assembly according to claim 13, characterized in that There is a phase difference of a first angle A between the two eccentric portions (11), the eccentricity of the two eccentric portions (11) is equal, and there is a phase difference of a second angle B between the extension directions of the two limiting channels (311), wherein the first angle A is twice the second angle B.

19. The pump assembly according to claim 18, characterized in that The two eccentric parts (11) are arranged opposite to each other at an angle of 180 degrees.

20. A rotary cylinder pump, characterized in that: It comprises a pump body assembly, and the pump body assembly is the pump body assembly according to any one of claims 1 to 19.

21. A heat exchange device, characterized in that: It comprises a rotary cylinder pump, wherein the rotary cylinder pump is the rotary cylinder pump according to claim 20.

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