Compressor pump body structure, compressor and electric appliance

Abstract

The invention discloses a compressor pump body structure, a compressor and an electric appliance, and relates to the technical field of compressors. According to the compressor pump body structure provided by the invention, during air suction, the piston is embedded in the cylinder hole, and the boss is embedded in the connecting through hole, so that the end face of the boss and the end face of the piston are matched according to the connecting through hole to form a second air suction containing cavity, and on the basis of not increasing the overall dimension of a compressor, the overall dimension of the compressor is not increased. And the suction capacity of the compressor is improved. During exhausting, the piston is flush with the end face of the cylinder hole, and the boss extends out of the connecting through hole. The end face of the boss protrudes out of the end face of the piston, the exhaust clearance volume in the cylinder hole can be reduced, and therefore the exhaust amount of the compressor is improved on the basis that the overall dimension of the compressor is not increased. Therefore, the compressor can be miniaturized while the air displacement and the air suction amount of the compressor are increased.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor pump body structure, a compressor and an electrical appliance. Background Art

[0002] In the refrigeration compressor industry, one of the development trends of compressors is to achieve miniaturization of compressors and increase the displacement of compressors. For example, small refrigeration systems often require small compressors. Small compressors usually have small exhaust volume due to the limitation of the size of the whole machine, which limits the application of small compressors.

[0003] When increasing the exhaust volume of a conventional compressor, it is usually necessary to increase the inner diameter and wall thickness of the cylinder bore, increase the overall dimensions and weight of the cylinder seat, and then increase the overall dimensions of the compressor. This makes it difficult to miniaturize the compressor while ensuring the exhaust volume. Summary of the invention

[0004] In view of the difficulty in miniaturizing the structure of a compressor while increasing the exhaust volume, the present invention is proposed to provide a compressor pump body structure, a compressor and an electrical appliance that overcome the above problem or at least partially solve the above problem.

[0005] Based on the first aspect of the present invention, a compressor pump body structure is provided, the compressor pump body structure comprising:

[0006] A cylinder seat, wherein a receiving cavity is provided in the cylinder seat and a cylinder hole communicating with the receiving cavity is opened;

[0007] A crankshaft assembly, wherein the crankshaft assembly is installed in the accommodating cavity;

[0008] a first connecting rod assembly, the first connecting rod assembly being disposed on the crankshaft assembly and offset from the center of the crankshaft assembly;

[0009] A piston, the piston is located in the cylinder hole and is movably connected to the first connecting rod assembly so as to make reciprocating linear motion along the cylinder hole driven by the first connecting rod assembly, wherein a connecting through hole is penetrated in the piston;

[0010] a second connecting rod assembly, the second connecting rod assembly being disposed on the first connecting rod assembly;

[0011] A boss, the boss is located in the connecting through hole and is movably connected to the second connecting rod assembly so as to make reciprocating linear motion along the connecting through hole under the drive of the second connecting rod assembly;

[0012] When inhaling, the piston is embedded in the cylinder hole, and the boss is embedded in the connecting through hole. When exhausting, the piston is flush with the end surface of the cylinder hole, and the boss extends out of the connecting through hole.

[0013] In an optional invention, the second connecting rod assembly includes:

[0014] a second eccentric crankshaft, wherein the second eccentric crankshaft is disposed on the first connecting rod assembly;

[0015] A second eccentric connecting rod, one end of the second eccentric connecting rod is rotatably connected to the second eccentric crankshaft, and the other end of the second eccentric connecting rod is hinged to the boss, wherein when the second eccentric crankshaft performs eccentric rotational motion under the rotational drive of the crankshaft assembly, the second eccentric connecting rod drives the boss to perform reciprocating linear motion along the connecting through hole.

[0016] An optional invention content, the boss is provided with a hinge groove on the end surface close to the second eccentric connecting rod, the second eccentric connecting rod comprises a second ring portion, a second connecting rod body and a second hinged joint, the second ring portion and the second hinged joint are respectively located at two ends of the second connecting rod body; wherein,

[0017] The second ring portion is sleeved on the second eccentric crankshaft and is clearance-matched with the second eccentric crankshaft. The second hinged head is matched with the hinged groove in shape to form a hinge.

[0018] An optional invention content is that the second ring portion, the second connecting rod body and the second hinged joint are an integrated structure.

[0019] In an optional invention, the first connecting rod assembly includes:

[0020] a first eccentric crankshaft, wherein the first eccentric crankshaft is fixed to the crankshaft assembly;

[0021] A first eccentric connecting rod, one end of the first eccentric connecting rod is rotatably connected to the first eccentric crankshaft, and the other end of the first eccentric connecting rod is rotatably connected to the piston, wherein when the first eccentric crankshaft is driven by the crankshaft assembly to perform eccentric rotational motion, the first eccentric connecting rod drives the piston to perform reciprocating linear motion along the cylinder bore.

[0022] An optional invention content, the piston is provided with an installation cavity opening toward the first eccentric connecting rod, and the piston is also provided with a pin shaft portion, and the central axis of the pin shaft portion is arranged parallel to the central axis of the first eccentric crankshaft, wherein the pin shaft portion is rotationally connected to the first eccentric connecting rod.

[0023] An optional invention content, the first eccentric connecting rod comprises a first ring portion, a first connecting rod body and a first connecting portion, the first ring portion and the first connecting portion are respectively located at two ends of the first connecting rod body; wherein,

[0024] The first ring portion is sleeved on the first eccentric crankshaft and is loosely matched with the first eccentric crankshaft. The first connecting portion is sleeved on the pin shaft portion and is loosely matched with the pin shaft portion.

[0025] An optional invention content, the first ring portion, the first connecting rod body and the first connecting portion are an integrated structure.

[0026] An optional invention content, the crankshaft assembly includes a crankshaft and a main shaft coaxially arranged with the crankshaft, the crankshaft is located in the accommodating cavity and is rotatably connected to the cylinder seat, the main shaft drives the crankshaft to rotate under the action of external force, wherein the first connecting rod assembly is arranged deviating from the center of the crankshaft.

[0027] An optional invention content is that the cross-sectional shape of the boss along the axial direction of the crankshaft assembly includes one of the following: circular, elliptical and rectangular.

[0028] Based on the second aspect of the present invention, a compressor is also provided, comprising a compressor pump body structure as described in any one of the above invention contents.

[0029] Based on the third aspect of the present invention, an electrical appliance is also provided, the electrical appliance comprising the compressor described in the above invention.

[0030] Compared with the prior art, the present invention includes a cylinder seat, a crankshaft assembly, a first connecting rod assembly, a piston, a second connecting rod assembly and a boss. An accommodating cavity is provided in the cylinder seat, and a cylinder hole communicating with the accommodating cavity is provided. The crankshaft assembly is installed in the accommodating cavity, and the first connecting rod assembly is arranged on the crankshaft assembly and is arranged offset from the center of the crankshaft assembly. The piston is located in the cylinder hole and is movably connected to the first connecting rod assembly so as to make reciprocating linear motion along the cylinder hole driven by the first connecting rod assembly, wherein a connecting through hole is penetrated in the piston. The second connecting rod assembly is arranged on the first connecting rod assembly. The boss is located in the connecting through hole and is movably connected to the second connecting rod assembly so as to make reciprocating linear motion along the connecting through hole driven by the second connecting rod assembly. During air intake, the piston is embedded in the cylinder hole, and the boss is embedded in the connecting through hole, so that the end face of the boss and the end face of the piston cooperate with the connecting through hole to form a second air intake cavity, thereby increasing the air intake volume of the compressor without increasing the overall dimensions of the compressor. During air exhaust, the piston is flush with the end face of the cylinder hole, and the boss extends out of the connecting through hole. The end face of the boss protrudes outward from the end face of the piston, which can reduce the exhaust clearance volume in the cylinder hole, thereby increasing the exhaust volume of the compressor without increasing the overall dimensions of the compressor. In this way, the compressor can be miniaturized while increasing the exhaust volume and intake volume of the compressor.

[0031] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0033] In the attached picture:

[0034] Figure 1 It is a three-dimensional structural schematic diagram of a compressor pump body structure provided by an embodiment of the present invention;

[0035] Figure 2 is a schematic diagram of a three-dimensional structure of a cylinder seat provided by an embodiment of the present invention;

[0036] Figure 3 is an exploded schematic diagram of a compressor pump body structure provided by an embodiment of the present invention;

[0037] Figure 4 It is a schematic diagram of the cross-sectional structure of a compressor pump body structure provided by an embodiment of the present invention during air intake;

[0038] Figure 5 yes Figure 4 A schematic diagram of the structure enlargement at point A;

[0039] Figure 6 It is a schematic diagram of the cross-sectional structure of a compressor pump body structure during exhaust provided by an embodiment of the present invention;

[0040] Figure 7 is a schematic diagram of a three-dimensional structure of a second eccentric connecting rod provided by an embodiment of the present invention;

[0041] Figure 8 is a schematic diagram of a first three-dimensional structure of a boss provided by an embodiment of the present invention;

[0042] Fig. 9 is a second three-dimensional structural schematic diagram of a boss provided by an embodiment of the present invention;

[0043] Fig.10 is a schematic diagram of a three-dimensional structure of a first eccentric connecting rod provided by an embodiment of the present invention;

[0044] Fig.11 is a first three-dimensional structural schematic diagram of a piston provided by an embodiment of the present invention;

[0045] Fig.12 is a second three-dimensional structural schematic diagram of a piston provided by an embodiment of the present invention;

[0046] Fig.13 is a schematic diagram of the three-dimensional structure of a crankshaft assembly provided by an embodiment of the present invention;

[0047] Figure numerals: 1. cylinder seat; 101. accommodating cavity; 102. cylinder hole; 103. shaft hole; 2. crankshaft assembly; 21. crankshaft; 22. main shaft; 3. first connecting rod assembly; 31. first eccentric crankshaft; 32. first eccentric connecting rod; 321. first ring portion; 322. first connecting rod body; 323. first connecting portion; 4. piston; 401. connecting through hole; 402. mounting cavity; 5. second connecting rod assembly; 51. second eccentric crankshaft; 52. second eccentric connecting rod; 521. second ring portion; 522. second connecting rod body; 523. second hinged head; 6. boss; 601. hinged groove; 602. second suction cavity; 7. pin shaft portion; 8. raft; 801. vent; 802. first suction cavity. DETAILED DESCRIPTION

[0048] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0049] In the refrigeration compressor industry, one of the development trends of compressors is to achieve miniaturization of compressors and increase the displacement of compressors. For example, small refrigeration systems often require small compressors. Small compressors usually have small exhaust volume due to the limitation of the size of the whole machine, which limits the application of small compressors.

[0050] When increasing the exhaust volume of a conventional compressor, it is usually necessary to increase the inner diameter and wall thickness of the cylinder bore, increase the overall dimensions and weight of the cylinder seat, and then increase the overall dimensions of the compressor. This makes it difficult to miniaturize the compressor while ensuring the exhaust volume.

[0051] Based on the above technical problems, an embodiment of the present invention is proposed. The embodiment of the present invention may include a cylinder block 1, a crankshaft assembly 2, a first connecting rod assembly 3, a piston 4, a second connecting rod assembly 5 and a boss 6. The cylinder block 1 is provided with a receiving cavity 101 and a cylinder hole 102 communicating with the receiving cavity 101. The crankshaft assembly 2 is installed in the receiving cavity 101, and the first connecting rod assembly 3 is arranged on the crankshaft assembly 2 and deviates from the center of the crankshaft assembly 2. The piston 4 is located in the cylinder hole 102 and is movably connected with the first connecting rod assembly 3 so as to make reciprocating linear motion along the cylinder hole 102 under the drive of the first connecting rod assembly 3, wherein a connecting through hole 401 is penetrated in the piston 4. The second connecting rod assembly 5 is arranged on the first connecting rod assembly 3. The boss 6 is located in the connecting through hole 401 and is movably connected with the second connecting rod assembly 5 so as to make reciprocating linear motion along the connecting through hole 401 under the drive of the second connecting rod assembly 5. During air intake, the piston 4 is embedded in the cylinder hole 102, and the boss 6 is embedded in the connecting through hole 401, so that the end surface of the boss 6 and the end surface of the piston 4 cooperate with the connecting through hole 401 to form a second air intake cavity, which increases the air intake volume of the compressor without increasing the overall dimensions of the compressor. During air exhaust, the piston 4 is flush with the end surface of the cylinder hole 102, and the boss 6 extends outward from the connecting through hole 401. The end surface of the boss 6 protrudes outward from the end surface of the piston 4, which can reduce the exhaust clearance volume in the cylinder hole 102, thereby increasing the exhaust volume of the compressor without increasing the overall dimensions of the compressor. In this way, the compressor can be miniaturized while increasing the exhaust volume and intake volume of the compressor.

[0052] Reference Figure 1-13 The embodiment of the present invention provides a compressor pump body structure, which may include a cylinder block 1, a crankshaft assembly 2, a first connecting rod assembly 3, a piston 4, a second connecting rod assembly 5 and a boss 6, wherein:

[0053] The cylinder seat 1 is provided with a receiving cavity 101, and a cylinder hole 102 communicating with the receiving cavity 101 is provided. The crankshaft assembly 2 is installed in the receiving cavity 101, and the first connecting rod assembly 3 is provided on the crankshaft assembly 2 and is arranged away from the center of the crankshaft assembly 2. The piston 4 is located in the cylinder hole 102 and is movably connected with the first connecting rod assembly 3 so as to make reciprocating linear motion along the cylinder hole 102 driven by the first connecting rod assembly 3, wherein a connecting through hole 401 is provided through the piston 4. The second connecting rod assembly 5 is provided on the first connecting rod assembly 3. The boss 6 is located in the connecting through hole 401 and is movably connected with the second connecting rod assembly 5 so as to make reciprocating linear motion along the connecting through hole 401 driven by the second connecting rod assembly 5.

[0054] In the embodiment of the present invention, the accommodating chamber 101 is used to provide an assembly space for the crankshaft assembly 2, the first connecting rod assembly 3, the second connecting rod assembly 5 and other components. The cylinder hole 102 is in communication with the accommodating chamber 101, so as to facilitate the assembly of the piston 4 and the first connecting rod assembly 3. The crankshaft assembly 2 is installed in the accommodating chamber 101 and is used to provide the first connecting rod assembly 3 and the second connecting rod assembly 5 with a driving force for eccentric rotational motion.

[0055] The first connecting rod assembly 3 is arranged on the crankshaft assembly 2 and is arranged offset from the center of the crankshaft assembly 2. Therefore, when the crankshaft assembly 2 is driven by an external force to rotate, the first connecting rod assembly 3 performs eccentric rotational motion on the crankshaft assembly 2 (relative to the crankshaft assembly 2). The second connecting rod assembly 5 is located on the first connecting rod assembly 3, and the second connecting rod assembly 5 moves synchronously with the first connecting rod assembly 3.

[0056] The piston 4 is located in the cylinder bore 102 and is connected to the first connecting rod assembly 3, so that during the eccentric rotation of the first connecting rod assembly 3, the first connecting rod assembly 3 is close to the end of the piston 4. In one rotation cycle, the piston 4 moves from being away from the cylinder bore 102 to being close to the cylinder bore 102, and then from being close to the cylinder bore 102 to being away from the cylinder bore 102, thereby being able to drive the piston 4 to make reciprocating linear motion along the cylinder bore 102 to inhale or exhaust air. For example, the process in which the piston 4 makes a linear motion along the cylinder bore 102 close to the crankshaft assembly 2 is called an intake process. The process in which the piston 4 makes a linear motion along the cylinder bore 102 away from the crankshaft assembly 2 is called an exhaust process.

[0057] The piston 4 is provided with a connecting through hole 401, wherein the connecting through hole 401 is completely provided from the end face of the piston 4 away from the crankshaft assembly 2 to the end face of the piston 4 close to the crankshaft assembly 2. The connecting through hole 401 is used to accommodate the boss 6. The boss 6 is located in the connecting through hole 401 and is movably connected to the second connecting rod assembly 5. While the piston 4 is performing reciprocating linear motion along the cylinder hole 102, the second connecting rod assembly 5 synchronously drives the boss 6 to perform reciprocating linear motion along the connecting through hole 401. Since the second connecting rod assembly 5 is located on the first connecting rod assembly 3, the piston 4 will reach the two end points of the reciprocating linear motion at the same time.

[0058] During the intake process, the piston 4 is embedded in the cylinder hole 102 and moves linearly toward the direction close to the crankshaft assembly 2. Figure 4 and Figure 5As shown, the piston 4, the raft plate 8 of the pump body structure, and the hole wall of the cylinder hole 102 cooperate (can also be called enclosure) to form a first suction cavity 802, and the raft plate 8 is also provided with a vent hole 801 for gas to pass through, and the boss 6 is embedded in the connecting through hole 401 and moves linearly toward the direction close to the crankshaft assembly 2. At this time, the end face of the piston 4 close to the first suction cavity 802, the end face of the boss 6 close to the first suction cavity 802, and the hole wall of the connecting through hole 401 cooperate (can also be called enclosure) to form a second suction cavity 602. Thus, without increasing the overall size of the compressor, the suction volume of the compressor is increased. For example, the suction volume is increased from the amount of gas that can be stored in the original first suction cavity 802 to the cumulative amount of gas stored in the first suction cavity 802 and the second suction cavity 602, and the suction efficiency of the compressor is further improved.

[0059] During the exhaust process, the piston 4 is embedded in the cylinder hole 102 and moves linearly in a direction away from the crankshaft assembly 2 until the piston 4 moves to the end surface of the cylinder hole 102 close to the raft plate 8 and is flush. Figure 6 As shown, the boss 6 moves linearly in a direction away from the crankshaft assembly 2 until the boss 6 extends out of the connecting through hole 401, that is, the end surface of the boss 6 close to the raft plate 8 is flush with the end surface of the raft plate 8 away from the first air intake cavity 802. In other words, during the exhaust process, the boss 6 can finally fill the vent 801 completely. Thus, the exhaust clearance volume in the cylinder bore 102 can be reduced. Among them, the exhaust clearance volume can be understood as the overall size of the remaining gas remaining in the vent 801 after the compressor exhausts. Thus, the exhaust volume of the compressor is increased without increasing the overall size of the compressor. For example, the exhaust volume is the amount of gas that can be stored in the original first air intake cavity 802 minus the amount of gas remaining in the exhaust hole. The increase is the cumulative amount of gas stored in the first air intake cavity 802 and the second air intake cavity 602. Thus, the compressor can be miniaturized while increasing the exhaust volume, exhaust efficiency, air intake volume and air intake efficiency of the compressor.

[0060] An optional embodiment of the invention, referring to Figure 1 , Figure 6 as well as Figure 7As shown, the second connecting rod assembly 5 may include a second eccentric crankshaft 51 and a second eccentric connecting rod 52, and the second eccentric crankshaft 51 is arranged on the first connecting rod assembly 3. One end of the second eccentric connecting rod 52 is rotatably connected to the second eccentric crankshaft 51, and the other end of the second eccentric connecting rod 52 is hinged to the boss 6, wherein, when the second eccentric crankshaft 51 is driven by the crankshaft assembly 2 to rotate and perform eccentric rotational motion, the second eccentric connecting rod 52 drives the boss 6 to perform reciprocating linear motion along the connecting through hole 401.

[0061] In the embodiment of the present invention, the second connecting rod assembly 5 may include a second eccentric crankshaft 51 and a second eccentric connecting rod 52, and the second eccentric crankshaft 51 is installed on the first connecting rod assembly 3. The second eccentric crankshaft 51 and the boss 6 are movably connected to the two ends of the second eccentric connecting rod 52 respectively. For example, the second eccentric connecting rod 52 is rotatably connected to the second eccentric crankshaft 51, and the boss 6 is hinged to the second eccentric connecting rod 52. Therefore, when one end of the second eccentric connecting rod 52 is displaced as the second eccentric crankshaft 51 rotates, the other end of the second eccentric connecting rod 52 can be rotated around the boss 6, and the boss 6 can be driven to perform reciprocating linear motion along the connecting through hole 401. Therefore, when the piston 4 moves, the suction and exhaust volume of the pump structure can be increased through the synchronous movement of the boss 6.

[0062] An optional embodiment of the invention, referring to Figure 7 , Figure 8 as well as Fig. 9 As shown, the end surface of the boss 6 close to the second eccentric connecting rod 52 is provided with a hinge groove 601, and the second eccentric connecting rod 52 includes a second ring portion 521, a second connecting rod body 522 and a second hinge joint 523, and the second ring portion 521 and the second hinge joint 523 are respectively located at two ends of the second connecting rod body 522. The second ring portion 521 is sleeved on the second eccentric crankshaft 51 and is clearance-matched with the second eccentric crankshaft 51, and the second hinge joint 523 is shaped in conjunction with the hinge groove 601 to form a hinge connection.

[0063] In the embodiment of the present invention, the end surface of the boss 6 close to the second eccentric connecting rod 52 is provided with a hinge groove 601, for example, the cross-sectional shape of the hinge groove 601 along the radial direction of the crankshaft assembly 2 can be more than half a circle. The central axis of the hinge groove 601 is arranged parallel to the central axis of the crankshaft assembly 2, so that when the second eccentric connecting rod 52 and the hinge groove 601 form an articulated fit, the rotation angle required for the rotational movement of the second eccentric connecting rod 52 around the central axis of the crankshaft assembly 2 can be adapted.

[0064] In some optional embodiments, the second eccentric connecting rod 52 may include a second ring portion 521, a second connecting rod body 522 and a second hinged joint 523. The second ring portion 521 is sleeved on the second eccentric crankshaft 51 and is clearance-matched with the second eccentric crankshaft 51, thereby forming a rotational connection between the second ring portion 521 and the second eccentric crankshaft 51. The second connecting rod body 522 is located between the second ring portion 521 and the second hinged joint 523. As some preferred embodiments, the second ring portion 521, the second connecting rod body 522 and the second hinged joint 523 may be an integrated structure, thereby simplifying the production process of the second eccentric connecting rod 52 and reducing the production cost of the second eccentric connecting rod 52.

[0065] In other embodiments, if the second ring portion 521, the second connecting rod body 522 and the second hinge joint 523 are all made of metal materials, the second ring portion 521 and the second connecting rod body 522 can be fixed by welding, and the second hinge joint 523 and the second connecting rod body 522 can be fixed by welding. The second hinge joint 523 and the hinge groove 601 are matched in shape to form a clearance fit, so that the hinge between the second hinge joint 523 and the boss 6 can be realized. The second hinge joint 523 can be a cylindrical structure, and the central axis of the second hinge joint 523 is arranged parallel to the central axis of the second ring portion 521. Therefore, when assembling the second eccentric connecting rod 52 and the boss 6, the second hinge joint 523 can be assembled into the hinge groove 601 along the axial direction of the hinge groove 601, and then the boss 6 is placed in the connecting through hole 401. Then the second ring portion 521 is sleeved on the second eccentric crankshaft 51. The connecting through hole 401 , the second eccentric crankshaft 51 and the first connecting rod assembly 3 cooperate to form an axial limit for the second eccentric connecting rod 52 along the crankshaft assembly 2 .

[0066] In some embodiments, the cylinder seat 1 can adopt a split structural design, so that the second ring portion 521 can be sleeved on the second eccentric crankshaft 51, and by finally assembling a part of the cylinder seat 1 and pressing it against the second eccentric crankshaft 51, a limit is formed on the second ring portion 521 to prevent the second ring portion 521 from falling out of the second eccentric crankshaft 51.

[0067] An optional embodiment of the invention, referring to Figure 1 , Figure 3 , Figure 4 as well as Figure 6As shown, the first connecting rod assembly 3 may include a first eccentric crankshaft 31 and a first eccentric connecting rod 32, wherein the first eccentric crankshaft 31 is fixed to the crankshaft assembly 2. One end of the first eccentric connecting rod 32 is rotatably connected to the first eccentric crankshaft 31, and the other end of the first eccentric connecting rod 32 is rotatably connected to the piston 4, wherein when the first eccentric crankshaft 31 is driven by the crankshaft assembly 2 to perform eccentric rotational motion, the first eccentric connecting rod 32 drives the piston 4 to perform reciprocating linear motion along the cylinder bore 102.

[0068] In the embodiment of the present invention, the first connecting rod assembly 3 may include a first eccentric crankshaft 31 and a first eccentric connecting rod 32. The first eccentric crankshaft 31 is mounted on the crankshaft assembly 2 and is arranged away from the central axis of the crankshaft assembly 2, so that when the crankshaft assembly 2 is driven by an external force to rotate, the first eccentric crankshaft 31 rotates eccentrically with the crankshaft assembly 2. One end of the first eccentric connecting rod 32 is rotationally connected to the first eccentric crankshaft 31, and the other end is rotationally connected to the piston 4. Therefore, when the first eccentric crankshaft 31 rotates eccentrically, the first eccentric connecting rod 32 drives the piston 4 to perform reciprocating linear motion along the cylinder bore 102, thereby realizing the suction and exhaust of the compressor.

[0069] During the intake process, the piston 4 is embedded in the cylinder hole 102 and moves linearly toward the direction close to the crankshaft assembly 2. Figure 4 and Figure 5 As shown, the piston 4, the raft plate 8 of the pump body structure, and the hole wall of the cylinder hole 102 cooperate (can also be called enclosure) to form a first suction cavity 802, and the raft plate 8 is also provided with a vent hole 801 for gas to pass through, and the boss 6 is embedded in the connecting through hole 401 and moves linearly toward the direction close to the crankshaft assembly 2. At this time, the end face of the piston 4 close to the first suction cavity 802, the end face of the boss 6 close to the first suction cavity 802, and the hole wall of the connecting through hole 401 cooperate (can also be called enclosure) to form a second suction cavity 602. Thus, without increasing the overall size of the compressor, the suction volume of the compressor is increased. For example, the suction volume is increased from the amount of gas that can be stored in the original first suction cavity 802 to the cumulative amount of gas stored in the first suction cavity 802 and the second suction cavity 602, and the suction efficiency of the compressor is further improved.

[0070] During the exhaust process, the piston 4 is embedded in the cylinder hole 102 and moves linearly in a direction away from the crankshaft assembly 2 until the piston 4 moves to the end surface of the cylinder hole 102 close to the raft plate 8 and is flush. Figure 6As shown, the boss 6 moves linearly in a direction away from the crankshaft assembly 2 until the boss 6 extends out of the connecting through hole 401, that is, the end surface of the boss 6 close to the raft plate 8 is flush with the end surface of the raft plate 8 away from the first air intake cavity 802. In other words, during the exhaust process, the boss 6 can finally fill the vent 801 completely. Thus, the exhaust clearance volume in the cylinder bore 102 can be reduced. Among them, the exhaust clearance volume can be understood as the overall size of the remaining gas remaining in the vent 801 after the compressor exhausts. Thus, the exhaust volume of the compressor is increased without increasing the overall size of the compressor. For example, the exhaust volume is the amount of gas that can be stored in the original first air intake cavity 802 minus the amount of gas remaining in the exhaust hole. The increase is the cumulative amount of gas stored in the first air intake cavity 802 and the second air intake cavity 602. Thus, the compressor can be miniaturized while increasing the exhaust volume, exhaust efficiency, air intake volume and air intake efficiency of the compressor.

[0071] An optional embodiment of the invention, referring to Fig.11 and Fig.12 As shown, the piston 4 is provided with a mounting cavity 402 opening toward the first eccentric connecting rod 32, and the piston 4 is also provided with a pin shaft portion 7, and the central axis of the pin shaft portion 7 is arranged parallel to the central axis of the first eccentric crankshaft 31, wherein the pin shaft portion 7 is rotationally connected to the first eccentric connecting rod 32.

[0072] In the embodiment of the present invention, a mounting cavity 402 is provided in the piston 4, which is opened toward the first eccentric connecting rod 32. For example, it can also be understood that the piston 4 is a hollow structure with one end open, and the end surface of the piston 4 away from the crankshaft assembly 2 is provided with the connecting through hole 401, and the connecting through hole 401 is connected with the mounting cavity 402. A pin shaft portion 7 is also provided in the mounting cavity 402. The pin shaft portion 7 is used for rotational connection with the first eccentric connecting rod 32. Therefore, when the first eccentric crankshaft 31 performs eccentric rotational motion, the piston 4 can perform straight reciprocating linear motion along the connecting through hole 401 through the rotation between the pin shaft portion 7 and the first eccentric connecting rod 32. Among them, the connection part between the pin shaft part 7 and the first eccentric connecting rod 32 can be a cylindrical structure, and the central axis of the pin shaft part 7 is set parallel to the central axis of the first eccentric crankshaft 31, so as to ensure that the rotation axis between the first eccentric connecting rod 32 and the piston 4, and the rotation axis between the first eccentric connecting rod 32 and the first eccentric crankshaft 31 are parallel.

[0073] In some embodiments, the pin shaft portion 7 and the piston 4 may be an integrated structure, thereby reducing the difficulty of assembling the piston 4 and the pin shaft portion 7, and reducing the production cost of the pump body structure. The pin shaft portion 7 and the crankshaft assembly 2 are combined to limit the first eccentric connecting rod 32. In addition, the second eccentric connecting rod 52 is located above the first eccentric connecting rod 32, so that the first eccentric connecting rod 32 can be prevented from being dislocated from the first eccentric crankshaft 31 under the limiting effect of the second eccentric connecting rod 52.

[0074] An optional embodiment of the invention, referring to Fig.10 As shown, the first eccentric connecting rod 32 includes a first ring portion 321, a first connecting rod body 322 and a first connecting portion 323, wherein the first ring portion 321 and the first connecting portion 323 are respectively located at two ends of the first connecting rod body 322. The first ring portion 321 is sleeved on the first eccentric crankshaft 31 and is loosely matched with the first eccentric crankshaft 31, and the first connecting portion 323 is sleeved on the pin shaft portion 7 and is loosely matched with the pin shaft portion 7.

[0075] In the embodiment of the present invention, the first eccentric connecting rod 32 may include a first ring portion 321, a first connecting rod body 322 and a first connecting portion 323. The first ring portion 321 and the first connecting portion 323 are respectively located at two ends of the first connecting rod body 322. The first ring portion 321 and the first connecting portion 323 may both be annular structures, wherein the first ring portion 321 is sleeved on the first eccentric crankshaft 31 and is clearance-matched with the first eccentric crankshaft 31, thereby forming a rotational connection between the first eccentric crankshaft 31 and the first eccentric connecting rod 32. The central axis of the first ring portion 321 is arranged to coincide with the central axis of the first eccentric crankshaft 31. The first connecting portion 323 is sleeved on the pin shaft portion 7 and is clearance-matched with the pin shaft portion 7, thereby forming a rotational connection between the first eccentric connecting rod 32 and the first eccentric crankshaft 31.

[0076] In some preferred embodiments, the first ring portion 321, the first connecting rod body 322 and the first connecting portion 323 are an integrated structure, thereby simplifying the production process of the first eccentric connecting rod 32 and reducing the production cost of the first eccentric connecting rod 32.

[0077] In other embodiments, if the first ring portion 321, the first connecting rod body 322 and the first connecting portion 323 are all made of metal materials, the first ring portion 321 and the first connecting rod body 322 can be fixed by welding, and the first connecting portion 323 and the first connecting rod body 322 can also be fixed by welding. Therefore, when assembling the piston 4 and the first eccentric connecting rod 32, the piston 4 can be placed in the cylinder hole 102 first, and then the first connecting portion 323 can be sleeved on the pin shaft portion 7, and then the first ring portion 321 can be sleeved on the first eccentric crankshaft 31.

[0078] When the crankshaft assembly 2 performs a rotational motion, the first eccentric crankshaft 31 performs an eccentric rotational motion driven by the crankshaft assembly 2 , and drives the piston 4 to perform a reciprocating linear motion along the cylinder bore 102 .

[0079] In some embodiments, the inner diameter of the first ring portion 321 is larger than the inner diameter of the first connecting portion 323. The diameter of the first eccentric crankshaft 31 is larger than the diameter of the second eccentric crankshaft 51, so that when the second eccentric connecting rod 52 is assembled, the first eccentric crankshaft 31 can form a bottom limit for the second eccentric connecting rod 52. In other words, when the second eccentric connecting rod 52 is sleeved on the second eccentric crankshaft 51, it forms a surface contact with the second eccentric crankshaft 51.

[0080] In some other embodiments, the crankshaft assembly 2, the first eccentric crankshaft 31 and the second eccentric crankshaft 51 may also be an integrated structure, which is not limited herein.

[0081] An optional embodiment of the invention, referring to Figure 3 , Figure 4 , Figure 6 as well as Fig.13 As shown, the crankshaft assembly 2 may include a crankshaft 21 and a main shaft 22 coaxially arranged with the crankshaft 21, the crankshaft 21 is located in the accommodating cavity 101, and is rotatably connected to the cylinder seat 1, and the main shaft 22 drives the crankshaft 21 to rotate under the action of external force, wherein the first connecting rod assembly 3 is arranged offset from the center of the crankshaft 21.

[0082] In the embodiment of the present invention, the crankshaft assembly 2 may include a crankshaft 21 and a main shaft 22, wherein both the crankshaft 21 and the main shaft 22 may be located in the accommodating cavity 101. Figure 2The cylinder seat 1 is also provided with an axial hole 103 for the main shaft 22 to pass through, and the axial hole 103 is in clearance with the main shaft 22. The coaxial arrangement of the crankshaft 21 and the main shaft 22 can be understood as the central axis of the crankshaft 21 coincides with the central axis of the main shaft 22, and the crankshaft 21 is rotationally connected to the cylinder seat 1. For example, the rotational connection can adopt a bearing seat and other structures, which are not limited here. The crankshaft 21 is fixedly connected to the main shaft 22. The main shaft 22 can rotate under the drive of an external force and drive the crankshaft 21 to rotate, so that the first connecting rod assembly 3 deviating from the center of the crankshaft 21 performs eccentric rotation.

[0083] In some embodiments, the cross-sectional shape of the crankshaft 21 in the radial direction may be circular or irregularly circular, and in order to ensure that the center of gravity of the crankshaft 21 is located on the central axis of the crankshaft 21, a counterweight may be fixed at a position of the crankshaft 21 away from the first eccentric crankshaft 31. The counterweight may be fixed to the crankshaft 21 by threaded connection, welding, or the like.

[0084] In an optional embodiment of the invention, the cross-sectional shape of the boss 6 along the axial direction of the crankshaft assembly 2 includes one of the following: circular, elliptical and rectangular.

[0085] In the embodiment of the present invention, the cross-sectional shape of the boss 6 along the axis direction of the crankshaft assembly 2 may be circular. In other embodiments, the cross-sectional shape of the boss 6 along the axis direction of the crankshaft assembly 2 may be elliptical, and in still other embodiments, the cross-sectional shape of the boss 6 along the axis direction of the crankshaft assembly 2 may be rectangular. Those skilled in the art may select the cross-sectional shape of the boss 6 according to the actual processing convenience, and no further limitation is made here.

[0086] In summary, the embodiment of the present invention discloses a compressor pump body structure, which may include a cylinder seat 1, a crankshaft assembly 2, a first connecting rod assembly 3, a piston 4, a second connecting rod assembly 5 and a boss 6. The cylinder seat 1 is provided with a receiving chamber 101, and is provided with a cylinder hole 102 communicating with the receiving chamber 101. The crankshaft assembly 2 is installed in the receiving chamber 101, and the first connecting rod assembly 3 is arranged on the crankshaft assembly 2 and is arranged away from the center of the crankshaft assembly 2. The piston 4 is located in the cylinder hole 102 and is movably connected with the first connecting rod assembly 3 so as to make reciprocating linear motion along the cylinder hole 102 under the drive of the first connecting rod assembly 3, wherein a connecting through hole 401 is penetrated in the piston 4. The second connecting rod assembly 5 is arranged on the first connecting rod assembly 3. The boss 6 is located in the connecting through hole 401 and is movably connected with the second connecting rod assembly 5 so as to make reciprocating linear motion along the connecting through hole 401 under the drive of the second connecting rod assembly 5. During air intake, the piston 4 is embedded in the cylinder hole 102, and the boss 6 is embedded in the connecting through hole 401, so that the end surface of the boss 6 and the end surface of the piston 4 cooperate with the connecting through hole 401 to form a second air intake cavity, which increases the air intake volume of the compressor without increasing the overall dimensions of the compressor. During air exhaust, the piston 4 is flush with the end surface of the cylinder hole 102, and the boss 6 extends outward from the connecting through hole 401. The end surface of the boss 6 protrudes outward from the end surface of the piston 4, which can reduce the exhaust clearance volume in the cylinder hole 102, thereby increasing the exhaust volume of the compressor without increasing the overall dimensions of the compressor. In this way, the compressor can be miniaturized while increasing the exhaust volume and intake volume of the compressor.

[0087] An embodiment of the present invention further discloses a compressor, which includes a compressor pump body structure as described in any one of the above-mentioned embodiments of the invention.

[0088] In the embodiment of the present invention, the compressor refers to a piston 4 compressor, which may include the compressor pump body structure described in any one of the above-mentioned invention embodiments. When the compressor is inhaling air, the piston 4 is embedded in the cylinder hole 102 and moves linearly in the direction close to the crankshaft assembly 2. The piston 4, the raft plate 8 of the pump body structure, and the hole wall of the cylinder hole 102 cooperate (also referred to as enclosure) to form a first suction cavity 802. The raft plate 8 is also provided with a vent hole 801 for gas to pass through. The boss 6 is embedded in the connecting through hole 401 and moves linearly in the direction close to the crankshaft assembly 2. At this time, the end face of the piston 4 close to the first suction cavity 802, the end face of the boss 6 close to the first suction cavity 802, and the hole wall of the connecting through hole 401 cooperate (also referred to as enclosure) to form a second suction cavity 602. As a result, the suction volume of the compressor is increased without increasing the overall size of the compressor. For example, the suction volume is increased from the original gas volume that can be stored in the first suction cavity 802 to the cumulative gas volume stored in the first suction cavity 802 and the second suction cavity 602, and the suction efficiency of the compressor is further improved.

[0089] During the exhaust process of the compressor, the piston 4 is embedded in the cylinder bore 102 and moves linearly in the direction away from the crankshaft assembly 2 until the piston 4 moves to the end face of the cylinder bore 102 close to the raft plate 8 and is flush. The boss 6 moves linearly in the direction away from the crankshaft assembly 2 until the boss 6 extends out of the connecting through hole 401, that is, the end face of the boss 6 close to the raft plate 8 is flush with the end face of the raft plate 8 away from the first suction cavity 802. In other words, during the exhaust process, the boss 6 can completely fill the vent 801. Thus, the exhaust clearance volume in the cylinder bore 102 can be reduced. Among them, the exhaust clearance volume can be understood as the overall size of the remaining gas remaining in the vent 801 after the compressor exhausts. Thus, the exhaust volume of the compressor is increased without increasing the overall size of the compressor. For example, the exhaust volume is the amount of gas that can be stored in the original first suction cavity 802 minus the amount of gas remaining in the exhaust hole. The accumulated gas volume stored in the first suction cavity 802 and the second suction cavity 602 is increased. Thus, the compressor can be miniaturized while increasing the exhaust volume, exhaust efficiency, suction volume and suction efficiency of the compressor. Moreover, the refrigeration capacity of the compressor can be well improved, so that the compressor can be miniaturized to achieve large refrigeration capacity.

[0090] The embodiment of the present invention further discloses an electrical appliance, which includes the compressor described in the above embodiment of the invention.

[0091] In the embodiment of the present invention, the electrical appliance may include related electrical appliances including a compressor, for example, the electrical appliance may include but is not limited to refrigerators, air conditioners and other electrical appliances.

[0092] In summary, the embodiment of the present invention discloses a compressor pump body structure, a compressor and an electrical appliance. The embodiment of the present invention may include a cylinder seat 1, a crankshaft assembly 2, a first connecting rod assembly 3, a piston 4, a second connecting rod assembly 5 and a boss 6. The cylinder seat 1 is provided with a receiving chamber 101 and a cylinder hole 102 communicating with the receiving chamber 101 is provided. The crankshaft assembly 2 is installed in the receiving chamber 101, and the first connecting rod assembly 3 is arranged on the crankshaft assembly 2 and is arranged away from the center of the crankshaft assembly 2. The piston 4 is located in the cylinder hole 102 and is movably connected with the first connecting rod assembly 3 so as to make reciprocating linear motion along the cylinder hole 102 under the drive of the first connecting rod assembly 3, wherein a connecting through hole 401 is penetrated in the piston 4. The second connecting rod assembly 5 is arranged on the first connecting rod assembly 3. The boss 6 is located in the connecting through hole 401 and is movably connected with the second connecting rod assembly 5 so as to make reciprocating linear motion along the connecting through hole 401 under the drive of the second connecting rod assembly 5. During air intake, the piston 4 is embedded in the cylinder hole 102, and the boss 6 is embedded in the connecting through hole 401, so that the end surface of the boss 6 and the end surface of the piston 4 cooperate with the connecting through hole 401 to form a second air intake cavity, which increases the air intake volume of the compressor without increasing the overall dimensions of the compressor. During air exhaust, the piston 4 is flush with the end surface of the cylinder hole 102, and the boss 6 extends outward from the connecting through hole 401. The end surface of the boss 6 protrudes outward from the end surface of the piston 4, which can reduce the exhaust clearance volume in the cylinder hole 102, thereby increasing the exhaust volume of the compressor without increasing the overall dimensions of the compressor. In this way, the compressor can be miniaturized while increasing the exhaust volume and intake volume of the compressor.

[0093] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0094] It is easy for a person skilled in the art to think that any combination of the above embodiments is feasible, so any combination of the above embodiments is an implementation scheme of the present invention. However, due to space limitations, this specification will not describe them in detail here.

[0095] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0096] Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof.

[0097] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

Claims

1. A compressor pump body structure, characterized in that: The compressor pump body structure comprises: A cylinder seat (1), wherein a receiving cavity (101) is provided in the cylinder seat (1), and a cylinder hole (102) communicating with the receiving cavity (101) is provided; A crankshaft assembly (2), wherein the crankshaft assembly (2) is installed in the accommodating cavity (101); A first connecting rod assembly (3), wherein the first connecting rod assembly (3) is arranged on the crankshaft assembly (2) and is arranged offset from the center of the crankshaft assembly (2); A piston (4), the piston (4) being located in the cylinder hole (102) and being movably connected to the first connecting rod assembly (3) so as to perform reciprocating linear motion along the cylinder hole (102) driven by the first connecting rod assembly (3), wherein a connecting through hole (401) is provided through the piston (4); A second connecting rod assembly (5), wherein the second connecting rod assembly (5) is arranged on the first connecting rod assembly (3); a boss (6), wherein the boss (6) is located in the connecting through hole (401) and is movably connected to the second connecting rod assembly (5) so as to perform reciprocating linear motion along the connecting through hole (401) under the drive of the second connecting rod assembly (5); When inhaling, the piston (4) is embedded in the cylinder hole (102), and the boss (6) is embedded in the connecting through hole (401); when exhausting, the piston (4) is flush with the end surface of the cylinder hole (102), and the boss (6) extends out of the connecting through hole (401).

2. The compressor pump body structure according to claim 1, characterized in that: The second connecting rod assembly (5) comprises: a second eccentric crankshaft (51), wherein the second eccentric crankshaft (51) is arranged on the first connecting rod assembly (3); A second eccentric connecting rod (52), one end of the second eccentric connecting rod (52) is rotatably connected to the second eccentric crankshaft (51), and the other end of the second eccentric connecting rod (52) is hinged to the boss (6), wherein when the second eccentric crankshaft (51) is driven by the crankshaft assembly (2) to perform eccentric rotational motion, the second eccentric connecting rod (52) drives the boss (6) to perform reciprocating linear motion along the connecting through hole (401).

3. The compressor pump body structure according to claim 2, characterized in that: The boss (6) is provided with a hinge groove (601) on an end surface close to the second eccentric connecting rod (52); the second eccentric connecting rod (52) comprises a second ring portion (521), a second connecting rod body (522) and a second hinge joint (523); the second ring portion (521) and the second hinge joint (523) are respectively located at two ends of the second connecting rod body (522); The second ring portion (521) is sleeved on the second eccentric crankshaft (51) and is clearance-matched with the second eccentric crankshaft (51); the second hinged head (523) is shape-matched with the hinged groove (601) to form a hinge.

4. The compressor pump body structure according to claim 3, characterized in that: The second ring portion (521), the second connecting rod body (522) and the second hinged joint (523) are an integrated structure.

5. The compressor pump body structure according to claim 1, characterized in that: The first connecting rod assembly (3) comprises: A first eccentric crankshaft (31), wherein the first eccentric crankshaft (31) is fixed to the crankshaft assembly (2); A first eccentric connecting rod (32), one end of the first eccentric connecting rod (32) is rotatably connected to the first eccentric crankshaft (31), and the other end of the first eccentric connecting rod (32) is rotatably connected to the piston (4), wherein when the first eccentric crankshaft (31) is driven by the crankshaft assembly (2) to perform eccentric rotational motion, the first eccentric connecting rod (32) drives the piston (4) to perform reciprocating linear motion along the cylinder bore (102).

6. The compressor pump body structure according to claim 5, characterized in that: The piston (4) is provided with a mounting cavity (402) opening toward the first eccentric connecting rod (32), and the piston (4) is also provided with a pin shaft portion (7), the central axis of the pin shaft portion (7) is arranged parallel to the central axis of the first eccentric crankshaft (31), wherein the pin shaft portion (7) is rotationally connected to the first eccentric connecting rod (32).

7. The compressor pump body structure according to claim 6, characterized in that: The first eccentric connecting rod (32) comprises a first ring portion (321), a first connecting rod body (322) and a first connecting portion (323), wherein the first ring portion (321) and the first connecting portion (323) are respectively located at two ends of the first connecting rod body (322); wherein, The first ring portion (321) is sleeved on the first eccentric crankshaft (31) and is loosely matched with the first eccentric crankshaft (31); the first connecting portion (323) is sleeved on the pin shaft portion (7) and is loosely matched with the pin shaft portion (7).

8. The compressor pump body structure according to claim 7, characterized in that: The first ring portion (321), the first connecting rod body (322) and the first connecting portion (323) are an integrated structure.

9. The compressor pump body structure according to claim 1, characterized in that: The crankshaft assembly (2) includes a crank wheel (21) and a main shaft (22) coaxially arranged with the crank wheel (21); the crank wheel (21) is located in the accommodating cavity (101) and is rotatably connected to the cylinder seat (1); the main shaft (22) drives the crank wheel (21) to rotate under the action of an external force, wherein the first connecting rod assembly (3) is arranged offset from the center of the crank wheel (21).

10. The compressor pump body structure according to claim 1, characterized in that: The cross-sectional shape of the boss (6) along the axial direction of the crankshaft assembly (2) includes one of the following: circular, elliptical and rectangular.

11. A compressor, characterized in that: The compressor comprises a compressor pump body structure as described in any one of claims 1-10.

12. An electrical appliance, characterized in that: The electrical appliance comprises the compressor as claimed in claim 11.

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