Pump body structure, fluid machine and heat exchange equipment

Abstract

The invention provides a pump body structure, fluid machinery and heat exchange equipment, the pump body structure comprises a first air cylinder, a first roller and a second air cylinder, the first air cylinder is provided with a first cavity, the first roller is movably arranged in the first cavity, the second air cylinder abuts against the end face of the first air cylinder, and the second air cylinder is provided with a second cavity; the end face, facing the second air cylinder, of the first roller is in sealed connection with the outer edge of the second cavity. According to the pump body structure, the fluid machine and the heat exchange equipment, the problem that in the prior art, a double-cylinder pump body structure is complex, and consequently the assembling efficiency is low can be solved.

Description

Technical Field

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

[0002] The existing rolling rotor compressor has low energy efficiency, especially in low temperature conditions, its heating capacity will be greatly reduced and cannot meet the heating needs of users. Therefore, a variety of refrigeration cycle forms that improve energy efficiency have appeared on the market, such as independent compression, two-stage air supply, etc., and these cycles currently use double-cylinder rolling rotor compressors.

[0003] Although the performance of the above-mentioned twin-cylinder compressor is greatly improved, changing from a single cylinder to a twin cylinder requires at least one set of compression parts, namely, a cylinder, a vane, a roller, and a middle partition. The number of parts increases significantly, the assembly process becomes complicated, and the cost also increases.

[0004] As can be seen from the above, the double-cylinder pump body structure in the prior art has the problem of low assembly efficiency due to its complex structure. Summary of the invention

[0005] The main purpose of the present invention is to provide a pump body structure, a fluid machine and a heat exchange device to solve the problem of low assembly efficiency due to the complex structure of the double-cylinder pump body structure in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a pump body structure is provided, which includes a first cylinder, the first cylinder having a first cavity; a first roller, the first roller is movably arranged inside the first cavity; a second cylinder, the second cylinder abuts against the end face of the first cylinder, the second cylinder has a second cavity, the second cavity is smaller than the first cavity, and the first roller is sealed and connected to the outer edge of the second cavity toward the end face of the second cylinder.

[0007] Further, the first cavity and the second cavity are coaxial; and / or the second cavity is located inside the area where the first cavity is formed.

[0008] Further, along the height direction of the first cylinder, the first cylinder is located above the second cylinder or the first cylinder is located below the second cylinder.

[0009] Furthermore, the pump body structure also includes a crankshaft, which passes through the first cavity and the second cavity, and has a first eccentric portion accommodated inside the first cavity and a second eccentric portion accommodated inside the second cavity, and the first roller is sleeved on the first eccentric portion; the second roller is movably arranged inside the second cavity, and the second roller is sleeved on the second eccentric portion, and the end face of the first roller facing the second cylinder is sealed and connected to the end face of the second roller.

[0010] Further, the first eccentric portion and the second eccentric portion are eccentric in the same direction; or the first eccentric portion and the second eccentric portion are eccentric in opposite directions; or the first eccentric portion and the second eccentric portion are eccentric at an angle.

[0011] Further, the eccentric diameter of the first eccentric portion is greater than the eccentric diameter of the second eccentric portion.

[0012] Furthermore, the crankshaft has a first shaft section and a second shaft section which are coaxially arranged, the diameter of the second shaft section is smaller than the diameter of the first shaft section, the first shaft section has a first eccentric portion, and the second shaft section has a second eccentric portion.

[0013] Further, the rotation center of the first roller does not coincide with the rotation center of the second roller.

[0014] Furthermore, the eccentricity of the first eccentric portion is e1, and the thickness of the first roller is b1, satisfying b1≥2e1+3.

[0015] Furthermore, a minimum distance δ1 between the outer wall surface of the first roller and the inner wall surface of the second cavity is greater than or equal to 2 mm; and / or a minimum distance δ2 between the inner wall surface of the first roller and the inner wall surface of the second cavity is greater than or equal to 1 mm.

[0016] Furthermore, the radius R2 of the inner wall surface of the second cylinder has a value range of: R1-b1+1≤R2≤R1-2e1-2, wherein R1 is the radius of the inner wall surface of the first cylinder, b1 is the thickness of the first roller, and e1 is the eccentricity of the first eccentric portion.

[0017] Furthermore, the eccentricity of the second eccentric portion is e2, and the value range of e2 is: 0.08≤e2≤0.5, wherein R1 is the radius of the inner wall surface of the first cylinder, b1 is the thickness of the first roller, and e1 is the eccentricity of the first eccentric portion.

[0018] Furthermore, the axial height of the second cavity is h2, and the value range of h2 is: 0.25≤h2≤R1-b1+1, wherein R1 is the radius of the inner wall surface of the first cylinder, b1 is the thickness of the first roller, and e1 is the eccentricity of the first eccentric portion.

[0019] Further, the first flange is arranged on the end face of the first cylinder away from the second cylinder, and the first flange has a first flange hole connected to the first cavity; the second flange is arranged at one end of the second cylinder away from the first cylinder, and the second flange has a second flange hole connected to the second cavity.

[0020] Furthermore, a first compression chamber is formed between the outer wall surface of the first roller, the inner wall surface of the first cavity, the first flange and the second cylinder; a second compression chamber is formed between the outer wall surface of the second roller of the pump body structure, the inner wall surface of the second cavity, the first roller and the second flange, and the first compression chamber and the second compression chamber are connected or not connected.

[0021] Further, when the first compression chamber and the second compression chamber are not connected, the first cylinder has a first air inlet channel and a first air outlet channel connected to the first compression chamber; the second cylinder has a second air inlet channel and a second air outlet channel connected to the second compression chamber.

[0022] Further, when the first compression chamber and the second compression chamber are connected, a mixing chamber is arranged on the first cylinder and / or the first flange and / or the second flange and / or the second cylinder, and the first cylinder has a first air inlet channel and a first air outlet channel connected to the first compression chamber, and the first air outlet channel is connected to the mixing chamber; the second cylinder has a second air inlet channel and a second air outlet channel connected to the second compression chamber, and the second air inlet channel is connected to the mixing chamber.

[0023] According to another aspect of the present invention, a fluid machine is provided, the fluid machine comprising the above-mentioned pump body structure.

[0024] According to another aspect of the present invention, a heat exchange device is provided, and the heat exchange device includes the above-mentioned fluid machinery.

[0025] Applying the technical solution of the present invention, the pump body structure includes a first cylinder, a first roller and a second cylinder, the first cylinder has a first cavity, the first roller is movably arranged inside the first cavity, the second cylinder abuts against the end face of the first cylinder, the second cylinder has a second cavity, the second cavity is smaller than the first cavity, and the first roller is sealed and connected to the outer edge of the second cavity toward the end face of the second cylinder.

[0026] As can be seen from the above, the pump body structure of the present application adopts the sealing between the cavities of different volumes through the first roller and the end face of the second cylinder of small volume, thereby realizing the operation of the double cylinder structure, eliminating the setting of the partition, and reasonably using the end face of the first roller for sealing assembly, simplifying the number of parts and assembly process, reducing assembly difficulty, and improving assembly efficiency. At the same time, using the end face of the roller itself for sealing is conducive to strengthening the sealing between the first roller and the second cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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:

[0028] Figure 1A schematic diagram of the installation structure of the pump body structure of the present invention is shown;

[0029] Figure 2 A cross-sectional view showing the pump structure of the present invention;

[0030] Figure 3 A schematic diagram showing a first position of the operating state of the pump structure of the present invention;

[0031] Figure 4 A schematic diagram showing a second position of the operating state of the pump structure of the present invention;

[0032] Figure 5 A schematic diagram showing a third position of the operating state of the pump structure of the present invention;

[0033] Figure 6 A schematic diagram showing a fourth position of the operating state of the pump structure of the present invention;

[0034] Figure 7 A schematic diagram of the installation structure of the pump body structure of the present invention is shown;

[0035] Figure 8 A schematic diagram showing the installation structure of the pump body structure of the first embodiment of the present invention is shown;

[0036] Fig. 9 A schematic diagram showing the installation structure of the pump body structure of the second embodiment of the present invention is shown;

[0037] Fig.10 A schematic diagram showing the installation structure of the pump body structure of the third embodiment of the present invention is shown;

[0038] Fig.11 A schematic diagram showing the installation structure of the pump body structure of the fourth embodiment of the present invention is shown;

[0039] Fig.12 A schematic diagram showing the installation structure of the pump body structure of the fifth embodiment of the present invention is shown;

[0040] Fig.13 A schematic diagram of the installation structure of the pump body structure of the sixth embodiment of the present invention is shown.

[0041] The above drawings include the following reference numerals:

[0042] 10. First cylinder; 110. First cavity; 120. First air inlet passage; 130. First air outlet passage; 140. Valve group; 150. Air supply passage; 160. Mixing chamber; 20. Second cylinder; 210. Second cavity; 220. Second air inlet passage; 30. First roller; 40. Second roller; 50. Crankshaft; 60. First slide vane; 70. Second slide vane; 80. Second flange; 90. First flange. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0045] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0046] Embodiment 1

[0047] In order to solve the problem of low assembly efficiency due to the complex structure of the double-cylinder pump body structure in the prior art, the present invention provides a pump body structure.

[0048] like Figures 1 to 8 As shown, the pump body structure includes a first cylinder 10, a first roller 30 and a second cylinder 20. The first cylinder 10 has a first cavity 110. The first roller 30 is movably arranged inside the first cavity 110. The second cylinder 20 abuts against the end face of the first cylinder 10. The second cylinder 20 has a second cavity 210. The second cavity 210 is smaller than the first cavity 110. The first roller 30 is sealed and connected to the outer edge of the second cavity 210 toward the end face of the second cylinder 20.

[0049] Specifically, the pump body structure of the present application adopts the sealing between the cavities of different volumes through the first roller 30 and the end face of the second cylinder 20 of small volume, thereby realizing the operation of the dual cylinder structure, eliminating the setting of the partition, and reasonably using the end face of the first roller 30 for sealing assembly, simplifying the number of parts and assembly process, reducing assembly difficulty, and improving assembly efficiency. At the same time, using the end face of the roller itself for sealing is conducive to strengthening the sealing between the first roller 30 and the second cylinder 20.

[0050] Furthermore, the first cavity 110 and the second cavity 210 are coaxial.

[0051] Furthermore, the second cavity 210 is smaller than the first cavity 110 and is located inside the area formed by the first cavity 110 so that the first roller 30 inside the first cylinder 10 can be sealed and abutted against the end surface of the second cylinder 20 facing the first cylinder 10 .

[0052] Further, along the height direction of the first cylinder 10 , the first cylinder 10 is located above the second cylinder 20 .

[0053] Furthermore, the pump body structure also includes a first slide 60 and a second slide 70. The first slide 60 cooperates with the first roller 30, and the first slide 60 follows the movement of the first roller 30 to realize piston movement inside the first cavity 110; similarly, the second slide 70 cooperates with the second roller 40, and the second slide 70 follows the second roller 40 to perform piston movement inside the second cavity 210.

[0054] Of course, it is not limited to that the first cylinder 10 is located above the second cylinder 20 along the height direction of the first cylinder 10 , but it can also be that the first cylinder 10 is located below the second cylinder 20 along the height direction of the first cylinder 10 .

[0055] In the present embodiment, the first cylinder 10 and the second cylinder 20 along the height direction portion of the first cylinder 10 form a dual cylinder structure.

[0056] like Figures 1 to 8 As shown, the pump body structure also includes a crankshaft 50 and a second roller 40. The crankshaft 50 passes through the first cavity 110 and the second cavity 210. The crankshaft 50 has a first eccentric portion accommodated inside the first cavity 110 and a second eccentric portion accommodated inside the second cavity 210. The first roller 30 is sleeved on the first eccentric portion, and the second roller 40 is movably arranged inside the second cavity 210. The second roller 40 is sleeved on the second eccentric portion. The end face of the first roller 30 facing the second cylinder 20 is sealed and connected to the end face of the second roller 40.

[0057] Specifically, the crankshaft 50 has a first eccentric portion and a second eccentric portion that cooperate with the first cylinder 10 and the second cylinder 20 .

[0058] Furthermore, the first eccentric portion and the second eccentric portion are eccentric in the same direction. Of course, it is not limited to that the first eccentric portion and the second eccentric portion are eccentric in the same direction. The first eccentric portion and the second eccentric portion may also be eccentric in opposite directions, that is, the defense direction of the first eccentric portion and the eccentric direction of the second eccentric portion are arranged at an interval of 180° along the circumference of the crankshaft 50; the first eccentric portion and the second eccentric portion may also be angularly eccentric. Specifically, the eccentricity of the first eccentric portion and the second eccentric portion may be adaptively arranged as required.

[0059] In this embodiment, the eccentric diameter of the first eccentric portion is larger than the eccentric diameter of the second eccentric portion. This is because the first cylinder 10 is larger than the second cylinder 20. In order to achieve end face abutment between the first roller 30 and the second cylinder 20, the first eccentric portion is set larger than the second eccentric portion so that the end face of the first roller 30 can be sealed and abutted with the end face of the second cylinder 20.

[0060] like Figures 1 to 8 As shown, the crankshaft 50 has a first shaft section and a second shaft section arranged coaxially, the diameter of the second shaft section is smaller than the diameter of the first shaft section, the first shaft section has a first eccentric portion, and the second shaft section has a second eccentric portion.

[0061] Specifically, the first eccentric portion is formed on the first shaft segment, and the second eccentric portion is formed on the second shaft segment, so that the first eccentric portion and the second eccentric portion rotate synchronously.

[0062] Furthermore, the shaft diameter of the first shaft segment is larger than the shaft diameter of the second shaft segment, so that shaft segments with different shaft diameters are respectively installed inside the first cavity 110 and the second cavity 210 of different sizes, so as to increase the internal volume of the first cavity 110 and the second cavity 210, thereby improving the compression efficiency.

[0063] Furthermore, the rotation center of the first roller 30 does not coincide with the rotation center of the second roller 40 .

[0064] Furthermore, the eccentricity of the first eccentric portion is e1, and the thickness of the first roller 30 is b1, which satisfies b1≥2e1+3. Only when the thickness of the first roller 30 is b1, which satisfies b1≥2e1+3, can the first roller 30 maintain a seal with the second cylinder 20 at any rotation angle.

[0065] Furthermore, the minimum distance δ1 between the outer wall surface of the first roller 30 and the inner wall surface of the second cavity 210 is greater than or equal to 2 mm to ensure sealing between the end surface of the first roller 30 and the end surface of the second cylinder 20 .

[0066] Furthermore, a minimum distance δ2 between the inner wall surface of the first roller 30 and the inner wall surface of the second cavity 210 is greater than or equal to 1 mm to ensure sealing between the end surface of the first roller 30 and the end surface of the second cylinder 20 .

[0067] In this embodiment, the radius R2 of the inner wall surface of the second cylinder 20 has a value range of: R1-b1+1≤R2≤R1-2e1-2, where R1 is the radius of the inner wall surface of the first cylinder 10, b1 is the thickness of the first roller 30, and e1 is the eccentricity of the first eccentric portion.

[0068] In this embodiment, the eccentricity of the second eccentric portion is e2, and the value range of e2 is: 0.08≤e2≤0.5, where R1 is the radius of the inner wall surface of the first cylinder 10, b1 is the thickness of the first roller 30, and e1 is the eccentricity of the first eccentric portion.

[0069] In this embodiment, the axial height of the second cavity 210 is h2, and the value range of h2 is: 0.25≤h2≤R1-b1+1, where R1 is the radius of the inner wall surface of the first cylinder 10, b1 is the thickness of the first roller 30, and e1 is the eccentricity of the first eccentric portion.

[0070] like Figures 1 to 8 As shown, the pump body structure also includes a first flange 90 and a second flange 80. The first flange 90 is arranged on the end surface of the first cylinder 10 away from the second cylinder 20, and the first flange 90 has a first flange hole connected to the first cavity 110. The second flange 80 is arranged at an end of the second cylinder 20 away from the first cylinder 10, and the second flange 80 has a second flange hole connected to the second cavity 210.

[0071] Specifically, the first flange 90 and the second flange 80 are used to position the first cylinder 10 and the second cylinder 20 , and the first flange hole and the second flange hole are used to provide an installation space for the crankshaft 50 .

[0072] Furthermore, a first compression chamber is formed between the outer wall surface of the first roller 30, the inner wall surface of the first cavity 110, the first flange 90 and the second cylinder 20. The first roller 30 and the second cylinder 20 are sealed, and the first roller 30 and the first flange 90 are sealed and slidably matched with the end surface of the second flange 80, thereby realizing that the first compression chamber is a sealed cavity.

[0073] Furthermore, a second compression chamber is formed between the outer wall surface of the second roller 40 of the pump body structure, the inner wall surface of the second cavity 210, the first roller 30 and the second flange 80. The second roller 40 is sealed with the first roller 30, the first roller 30 is sealed with the second cylinder 20, and the second roller 40 is sealed and slidably matched with the end surface of the second flange 80 toward the first flange 90, thereby realizing that the second compression chamber is a sealed cavity.

[0074] In this embodiment, the first compression chamber and the second compression chamber are not connected.

[0075] Embodiment 2

[0076] Different from the first embodiment, Fig. 9 As shown, in this embodiment, the second roller 40 is not disposed inside the second cavity 210 .

[0077] Specifically, when the internal volume of the second cavity 210 is smaller than a preset value, the second roller 40 can be removed, and the second eccentric portion can be used to compress the second compression cavity.

[0078] Embodiment 3

[0079] like Fig.10As shown, when the first compression chamber and the second compression chamber are not connected, the first cylinder 10 has a first air inlet channel 120 and a first air outlet channel 130 connected to the first compression chamber, and the second cylinder 20 has a second air inlet channel 220 and a second air outlet channel connected to the second compression chamber.

[0080] Specifically, the first cavity 110 and the second cavity 210 are independently arranged, and the first cylinder 10 and the second cylinder 20 each have independent air inlet and outlet passages, thereby realizing independent compression and exhaust of the first cylinder 10 and the second cylinder 20, thereby achieving a dual-cylinder exhaust effect.

[0081] In this embodiment, the second intake passage 220 is disposed on the second flange 80 , and the first intake passage 120 is disposed on the first cylinder 10 .

[0082] Embodiment 4

[0083] Different from the first embodiment, in this embodiment, Fig.11 As shown, the first compression chamber is communicated with the second compression chamber.

[0084] Specifically, a mixing chamber 160 is provided on the second flange 80, the first cylinder 10 has a first air intake channel 120 and a first air outlet channel 130 which are connected to the first compression chamber, and the first air outlet channel 130 is connected to the mixing chamber 160, and the second cylinder 20 has a second air intake channel 220 and a second air outlet channel which are connected to the second compression chamber, and the second air intake channel 220 is connected to the mixing chamber 160.

[0085] Furthermore, by setting up a mixing chamber 160, the gas inside the first compression chamber and the second compression chamber can be connected at the mixing chamber 160, so that the first air outlet channel 130 exhausts air into the interior of the mixing chamber 160 and then flows to the second air inlet channel 220 for secondary compression, thereby improving the compression efficiency.

[0086] Furthermore, a valve group 140 is disposed inside the mixing chamber 160 to control the gas flow inside the mixing chamber 160 .

[0087] It should be noted that the mixing chamber 160 is not limited to being arranged on the first cylinder 10, but the mixing chamber 160 may also be arranged on the second cylinder 20, and the specific setting position may be adaptively adjusted according to needs.

[0088] In this embodiment, a gas supplement channel 150 is further provided on the side wall of the mixing chamber 160 so as to supplement gas into the interior of the mixing chamber 160 through the gas supplement channel 150 . The gas supplement channel 150 can be used as a gas supply channel.

[0089] Embodiment 5

[0090] Different from the third embodiment, Fig.12 As shown, when the first compression chamber and the second compression chamber are not connected, the first cylinder 10 has a first air inlet channel 120 and a first air outlet channel 130 connected to the first compression chamber, and the second cylinder 20 has a second air inlet channel 220 and a second air outlet channel connected to the second compression chamber.

[0091] Specifically, the first cavity 110 and the second cavity 210 are independently arranged, and the first cylinder 10 and the second cylinder 20 each have independent air inlet and outlet passages, thereby realizing independent compression and exhaust of the first cylinder 10 and the second cylinder 20, thereby achieving a dual-cylinder exhaust effect.

[0092] In this embodiment, the second intake passage 220 is disposed on the first flange 90 , and the first intake passage 120 is disposed on the first cylinder 10 .

[0093] Embodiment 6

[0094] Different from the fourth embodiment, Fig.13 As shown, the first compression chamber is communicated with the second compression chamber.

[0095] Specifically, a mixing chamber 160 is provided on the first flange 90, the first cylinder 10 has a first air intake channel 120 and a first air outlet channel 130 which are connected to the first compression chamber, and the first air outlet channel 130 is connected to the mixing chamber 160, and the second cylinder 20 has a second air intake channel 220 and a second air outlet channel which are connected to the second compression chamber, and the second air intake channel 220 is connected to the mixing chamber 160.

[0096] Specifically, a mixing chamber 160 is provided to enable the gas inside the first compression chamber and the second compression chamber to be connected at the mixing chamber 160, so that the first air outlet channel 130 exhausts air into the mixing chamber 160 and then flows to the second air inlet channel 220 for secondary compression, thereby improving the compression efficiency.

[0097] Furthermore, a valve group 140 is disposed inside the mixing chamber 160 to control the gas flow inside the mixing chamber 160 .

[0098] In this embodiment, a gas supplement channel 150 is further provided on the side wall of the mixing chamber 160 so as to supplement gas into the interior of the mixing chamber 160 through the gas supplement channel 150 . The gas supplement channel 150 can be used as a gas supply channel.

[0099] Embodiment 7

[0100] The present invention provides a fluid machinery, the fluid machinery comprising the pump body structure of any one of embodiments 1 to 6.

[0101] Embodiment 8

[0102] The present invention provides a heat exchange device, which includes the fluid machinery in Embodiment 7.

[0103] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0104] 1. The pump body structure of the present application adopts a seal between cavities of different volumes through the first roller 30 and the end face of the small-volume second cylinder 20, thereby realizing the operation of the dual-cylinder structure, eliminating the setting of the partition, and rationally utilizing the end face of the first roller 30 for sealing assembly, simplifying the number of parts and assembly process, reducing assembly difficulty, and improving assembly efficiency.

[0105] 2. The present application utilizes the end face of the roller itself for sealing, which is beneficial to enhancing the sealing between the first roller 30 and the second cylinder 20 .

[0106] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0107] 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.

[0108] 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.

[0109] The above description is only a preferred embodiment of the present invention and is 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 body structure, characterized in that: include: A first cylinder (10), the first cylinder (10) having a first cavity (110); a first roller (30), the first roller (30) being movably disposed inside the first cavity (110); A second cylinder (20), wherein the second cylinder (20) abuts against an end surface of the first cylinder (10), the second cylinder (20) has a second cavity (210), the second cavity (210) is smaller than the first cavity (110), and the first roller (30) is sealedly connected to an outer edge of the second cavity (210) toward the end surface of the second cylinder (20).

2. The pump body structure according to claim 1, characterized in that: The first cavity (110) and the second cavity (210) are coaxial; and / or The second cavity (210) is located inside the area where the first cavity (110) is formed.

3. The pump structure according to claim 1, characterized in that: Along the height direction of the first cylinder (10), the first cylinder (10) is located above the second cylinder (20) or the first cylinder (10) is located below the second cylinder (20).

4. The pump structure according to claim 1, characterized in that: The pump body structure also includes: a crankshaft (50), the crankshaft (50) passing through the first cavity (110) and the second cavity (210), the crankshaft (50) comprising a first eccentric portion accommodated in the first cavity (110) and a second eccentric portion accommodated in the second cavity (210), the first roller (30) being sleeved on the first eccentric portion; A second roller (40), the second roller (40) is movably arranged inside the second cavity (210), the second roller (40) is sleeved on the second eccentric portion, and the end surface of the first roller (30) facing the second cylinder (20) is sealed and connected to the end surface of the second roller (40).

5. The pump structure according to claim 4, characterized in that: The first eccentric portion and the second eccentric portion are eccentric in the same direction; or The first eccentric portion and the second eccentric portion are eccentric to each other; or The first eccentric portion and the second eccentric portion are angularly eccentric.

6. The pump structure according to claim 4, characterized in that: An eccentric diameter of the first eccentric portion is greater than an eccentric diameter of the second eccentric portion.

7. The pump structure according to claim 4, characterized in that: The crankshaft (50) comprises a first shaft section and a second shaft section which are coaxially arranged, the diameter of the second shaft section is smaller than the diameter of the first shaft section, the first shaft section comprises a first eccentric portion, and the second shaft section comprises a second eccentric portion.

8. The pump structure according to claim 4, characterized in that: The rotation center of the first roller (30) does not coincide with the rotation center of the second roller (40).

9. The pump structure according to claim 4, characterized in that: The eccentricity of the first eccentric portion is e1, and the thickness of the first roller (30) is b1, satisfying b1≥2e1+3.

10. The pump structure according to claim 1, characterized in that: The minimum distance δ1 between the outer wall surface of the first roller (30) and the inner wall surface of the second cavity (210) is greater than or equal to 2 mm; and / or A minimum distance δ2 between an inner wall surface of the first roller (30) and an inner wall surface of the second cavity (210) is greater than or equal to 1 mm.

11. The pump structure according to claim 4, characterized in that: The radius R2 of the inner wall surface of the second cylinder (20) has a value range of: R1-b1+1≤R2≤R1-2e1-2, where R1 is the radius of the inner wall surface of the first cylinder (10), b1 is the thickness of the first roller (30), and e1 is the eccentricity of the first eccentric portion.

12. The pump structure according to claim 4, characterized in that: The eccentricity of the second eccentric portion is e2, and the value range of e2 is: 0.08(R1-2e1-2)≤e2≤0.5(R1-b1+1), wherein R1 is the radius of the inner wall surface of the first cylinder (10), b1 is the thickness of the first roller (30), and e1 is the eccentricity of the first eccentric portion.

13. The pump structure according to claim 4, characterized in that: The axial height of the second cavity (210) is h2, and the value range of h2 is: 0.25(R1-2e1-2)≤h2≤R1-b1+1, wherein R1 is the radius of the inner wall surface of the first cylinder (10), b1 is the thickness of the first roller (30), and e1 is the eccentricity of the first eccentric portion.

14. The pump structure according to claim 1, characterized in that: The pump body structure also includes: a first flange (90), the first flange (90) being arranged on an end surface of the first cylinder (10) away from the second cylinder (20), the first flange (90) having a first flange hole communicating with the first cavity (110); A second flange (80), wherein the second flange (80) is arranged at an end of the second cylinder (20) away from the first cylinder (10), and the second flange (80) has a second flange hole connected to the second cavity (210).

15. The pump structure according to claim 14, characterized in that: A first compression chamber is formed between the outer wall surface of the first roller (30), the inner wall surface of the first cavity (110), the first flange (90) and the second cylinder (20); A second compression chamber is formed between the outer wall surface of the second roller (40) of the pump body structure, the inner wall surface of the second cavity (210), the first roller (30) and the second flange (80), and the first compression chamber and the second compression chamber are connected or not connected.

16. The pump structure according to claim 15, characterized in that: When the first compression chamber and the second compression chamber are not connected, The first cylinder (10) has a first air inlet passage (120) and a first air outlet passage (130) which are connected to the first compression chamber; The second cylinder (20) has a second air inlet passage (220) and a second air outlet passage which are connected to the second compression chamber.

17. The pump structure according to claim 15, characterized in that: When the first compression chamber and the second compression chamber are connected, a mixing chamber (160) is provided on the first cylinder (10) and / or the first flange (90) and / or the second flange (80) and / or the second cylinder (20). The first cylinder (10) has a first air inlet passage (120) and a first air outlet passage (130) which are connected to the first compression chamber, and the first air outlet passage (130) is connected to the mixing chamber (160); The second cylinder (20) has a second air inlet passage (220) and a second air outlet passage which are connected to the second compression chamber, and the second air inlet passage (220) is connected to the mixing chamber (160).

18. A fluid machine, characterized in that: The fluid machinery includes the pump body structure according to any one of claims 1 to 17.

19. A heat exchange device, characterized in that: The heat exchange equipment includes the fluid machinery according to claim 18.

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