Compressor and refrigeration equipment

Abstract

The invention discloses a compressor and refrigeration equipment, and relates to the technical field of refrigeration equipment, and the compressor comprises a shell, a crankcase, an air cylinder, a motor, a crankshaft and a shaft sleeve. The crankcase is provided with a mounting shaft hole which is vertically through, the motor is provided with a via hole which penetrates through the upper end and the lower end of the motor, the crankshaft is located in the shell and is in running fit with the mounting shaft hole, and the lower end of the crankshaft extends out of the lower end of the motor from the via hole; the shaft sleeve hole is in interference fit with the lower end of the crankshaft, the supporting plate is arranged on the outer side of the sleeve body, the supporting plate is located at the lower end of the motor and connected with the rotor component, the sleeve body is provided with a lower sleeving section downwards exceeding the supporting plate, and the lower sleeving section downwards extends to utilize the space between the lower portion of the motor and the bottom of the shell. On the premise that the lower sleeving section does not occupy the extra height size of the compressor, the contact area between the sleeve body and the crankshaft is increased, and then the overall height of the compressor can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a compressor and a refrigeration equipment. Background Art

[0002] As the living standards of residents improve, people's demand for refrigerator volume is increasing. However, the appearance size of refrigerators is usually fixed, which puts higher requirements on the overall height of refrigerator compressors. Reducing the overall height of the compressor will inevitably lead to a reduction in the axial size of internal components. When reducing the axial size of the motor component, the length of the matching section between the rotor component and the crankshaft will inevitably be shortened. The reduction in the matching area will aggravate the wear of the crankshaft, thereby affecting the reliability of the compressor operation. The motor component is the core component of the compressor, and its height accounts for a large part of the entire compressor height. When considering reducing the height of the compressor by reducing the height of the motor component, due to wear problems, the height of the motor component will not be reduced to the corresponding efficiency limit point, which greatly affects the development of low-height compressors, and then affects the economic benefits of the refrigerator industry. Summary of the invention

[0003] The main purpose of the present invention is to provide a compressor and a refrigeration device, aiming to meet the reliability of compressor operation while reducing the overall height of the compressor.

[0004] To achieve the above object, the present invention provides a compressor, comprising:

[0005] case;

[0006] A crankcase, arranged on the housing, wherein the crankcase is provided with a mounting shaft hole extending vertically therethrough;

[0007] a cylinder located in the housing and disposed on an upper side of the crankcase;

[0008] A motor, located in the housing and arranged at the lower side of the crankcase, the motor comprising a stator component and a rotor component, and the motor is provided with through holes arranged through the upper and lower ends thereof;

[0009] A crankshaft is located in the housing and rotatably cooperates with the mounting shaft hole, an eccentric portion connected to the connecting rod of the cylinder is provided at the upper end of the crankshaft, and a lower end of the crankshaft extends from the lower end of the motor through the through hole; and

[0010] The sleeve comprises a sleeve body and a support plate, the sleeve body is provided with a sleeve hole penetrating through the upper and lower ends thereof, the sleeve hole is interference fit with the lower end of the crankshaft, the support plate is arranged on the outer side of the sleeve body, the support plate is located at the lower end of the motor and is connected to the rotor component, the lower end of the sleeve body is arranged beyond the lower side of the support plate to form a lower sleeve section exceeding the lower side of the support plate, and the lower end of the lower sleeve section is spaced apart from the bottom of the shell.

[0011] In one embodiment, the upper end of the sleeve body is disposed beyond the upper side of the support plate to form an upper sleeve section that exceeds the upper side of the support plate, and the upper sleeve section extends into the through hole.

[0012] In one embodiment, the length of the lower sleeve section is greater than or equal to the length of the upper sleeve section.

[0013] In one embodiment, the crankshaft includes a first matching section and a second matching section distributed in the up-down direction, the first matching section is clearance-matched with the mounting shaft hole, and the second matching section is interference-fitted with the shaft sleeve;

[0014] Wherein, the outer diameter of the second fitting segment is greater than the outer diameter of the first fitting segment, and the outer diameter of the second fitting segment is smaller than the inner diameter of the mounting shaft hole.

[0015] In one embodiment, an extension portion is extended from the lower end of the crankcase into the through hole, and the mounting shaft hole is provided through the extension portion.

[0016] In one embodiment, a crankshaft blade protruding laterally is formed at the upper end of the crankshaft, the crankshaft blade is located on the upper side of the crankcase, the eccentric portion is arranged on the upper side of the crankshaft blade, and a rolling support structure is arranged between the crankshaft blade and the crankcase.

[0017] In one embodiment, the rolling support structure includes two annular support sheets arranged in the up-down direction and a retaining frame rollingly arranged between the two annular support sheets;

[0018] The inner diameter of the two annular support plates is greater than the outer diameter of the lower end of the crankshaft.

[0019] In one embodiment, the stator component is arranged in a ring shape, and the rotor component is arranged inside the stator component;

[0020] The support plate is connected to the lower end of the rotor component.

[0021] In one embodiment, the support plate is made of a magnetically isolating material; and / or,

[0022] The material of the shaft sleeve is a magnetic isolation material; and / or,

[0023] A magnetic isolation member is arranged between the rotor component and the support plate.

[0024] In one embodiment, the thickness of the sleeve is greater than or equal to 13.5 mm; and / or,

[0025] The thickness of the support plate is greater than or equal to 1.5 mm; and / or,

[0026] The crankcase is spaced apart from the upper end of the motor, and an electrical gap is reserved at least in a region corresponding to the upper end of the stator component, and the electrical gap is greater than or equal to 3 mm.

[0027] The present invention further provides a refrigeration device, comprising a compressor, wherein the compressor comprises:

[0028] case;

[0029] A crankcase, arranged on the housing, wherein the crankcase is provided with a mounting shaft hole extending vertically therethrough;

[0030] a cylinder located in the housing and disposed on an upper side of the crankcase;

[0031] A motor, located in the housing and arranged at the lower side of the crankcase, the motor comprising a stator component and a rotor component, and the motor is provided with through holes arranged through the upper and lower ends thereof;

[0032] A crankshaft is located in the housing and rotatably cooperates with the mounting shaft hole, an eccentric portion connected to the connecting rod of the cylinder is provided at the upper end of the crankshaft, and a lower end of the crankshaft extends from the lower end of the motor through the through hole; and

[0033] The sleeve comprises a sleeve body and a support plate, the sleeve body is provided with a sleeve hole penetrating through the upper and lower ends thereof, the sleeve hole is interference fit with the lower end of the crankshaft, the support plate is arranged on the outer side of the sleeve body, the support plate is located at the lower end of the motor and is connected to the rotor component, the lower end of the sleeve body is arranged beyond the lower side of the support plate to form a lower sleeve section exceeding the lower side of the support plate, and the lower end of the lower sleeve section is spaced apart from the bottom of the shell.

[0034] In one embodiment, the upper end of the sleeve body is disposed beyond the upper side of the support plate to form an upper sleeve section that exceeds the upper side of the support plate, and the upper sleeve section extends into the through hole.

[0035] In the technical solution of the present invention, the upper side of the support plate is connected to the rotor part of the motor so that the support plate can rotate together with the rotor part to transmit power, and the sleeve connected to the support plate can rotate together and transmit power. The lower sleeve section extending beyond the first side of the support plate is connected to the crankshaft, and the power received by the sleeve can be transmitted to the crankshaft in one step. In this process, since the lower sleeve section can be set to a sufficient length to increase the contact area with the crankshaft, the holding force at the contact point between the two can be increased, the wear on the crankshaft can be reduced, and the reliability of the compressor operation can be improved.

[0036] The sleeve body of the shaft sleeve has a lower sleeve section that extends downward beyond the support plate. The lower sleeve section can extend downward to utilize the space between the bottom of the motor and the bottom of the shell 1. To this end, the lower sleeve section increases the contact area between the sleeve body and the crankshaft without occupying additional height dimensions of the compressor. The setting height of the rotor component is no longer limited by the length of the matching section with the crankshaft, thereby being able to reduce the height of the rotor component while meeting the reliability of the compressor operation, ultimately reducing the overall height of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0038] Figure 1 A cross-sectional schematic diagram of an embodiment of a compressor provided by the present invention;

[0039] Figure 2 for Figure 1 A three-dimensional schematic diagram of a partial structure of a compressor;

[0040] Figure 3 for Figure 2 A top view of

[0041] Figure 4 for Figure 2 Schematic diagram of the three-dimensional decomposition of

[0042] Figure 5 for Figure 2 Schematic cross-sectional view of ;

[0043] Figure 6 for Figure 1 A schematic structural diagram of an embodiment of a middle shaft sleeve;

[0044] Figure 7 for Figure 6 Side view of the middle bushing;

[0045] Figure 8 for Figure 6 A top view of the middle bushing;

[0046] Fig. 9 for Figure 1 A schematic structural diagram of an embodiment of a middle crankshaft;

[0047] Fig.10 for Figure 1 A schematic structural diagram of an embodiment of a crankcase.

[0048] Description of Figure Numbers:

[0049] 100. Compressor;

[0050] 1. Shell;

[0051] 2. crankcase; 21. mounting shaft hole; 22. extension part;

[0052] 3. Cylinder;

[0053] 4. Motor; 41. Stator component; 42. Rotor component; 43. Via hole;

[0054] 5. crankshaft; 51. first matching section; 52. second matching section; 53. crankshaft blade; 54. main shaft oil hole; 55. first oil groove; 56. eccentric part; 57. second oil groove; 58. exhaust passage;

[0055] 6. shaft sleeve; 61. sleeve body; 611. shaft sleeve hole; 612. lower sleeve connecting section; 613. upper sleeve connecting section;

[0056] 62. Support plate; 621. Mounting hole;

[0057] 7. rolling support structure; 71. annular support sheet; 72. retaining frame;

[0058] 8. Electrical clearance.

[0059] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0062] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0063] As the living standards of residents improve, people's demand for refrigerator volume is increasing. However, the appearance size of refrigerators is usually fixed, which puts higher requirements on the overall height of refrigerator compressors. Reducing the overall height of the compressor will inevitably lead to a reduction in the axial size of internal components. When reducing the axial size of the motor component, the length of the matching section between the rotor component and the crankshaft will inevitably be shortened. The reduction in the matching area will aggravate the wear of the crankshaft, thereby affecting the reliability of the compressor operation. The motor component is the core component of the compressor, and its height accounts for a large part of the entire compressor height. When considering reducing the height of the compressor by reducing the height of the motor component, due to wear problems, the height of the motor component will not be reduced to the corresponding efficiency limit point, which greatly affects the development of low-height compressors, and then affects the economic benefits of the refrigerator industry.

[0064] In order to solve the above technical problems, Figures 1 to 5As shown, the present invention proposes a compressor 100, which includes a housing 1, a crankcase 2, a cylinder 3, a motor 4, a crankshaft 5 and a sleeve 6; the crankcase 2 is arranged in the housing 1, and the crankcase 2 is provided with a mounting shaft hole 21 that is arranged through from top to bottom; the cylinder 3 is located in the housing 1 and is arranged on the upper side of the crankcase 2; the motor 4 is located in the housing 1 and is arranged on the lower side of the crankcase 2, the motor 4 includes a stator component 41 and a rotor component 42, and the motor 4 is provided with a through hole 43 that is arranged through the upper and lower ends thereof; the crankshaft 5 is located in the housing 1 and is rotatably matched with the mounting shaft hole 21, and the upper end of the crankshaft 5 is provided with a through hole 43 that is arranged through the upper and lower ends thereof The eccentric portion 56 of the connecting rod of the cylinder 3 is connected, and the lower end of the crankshaft 5 extends out of the lower end of the motor 4 from the through hole 43; the sleeve 6 includes a sleeve body 61 and a support plate 62, and the sleeve body 61 is provided with a sleeve hole running through its upper and lower ends, and the sleeve hole is interference fit with the lower end of the crankshaft 5, and the support plate 62 is arranged on the outer side of the sleeve body 61, and the support plate 62 is located at the lower end of the motor 4 and connected to the rotor component 42, and the lower end of the sleeve body 61 is arranged beyond the lower side of the support plate 62 to form a lower sleeve section 612 that exceeds the lower side of the support plate 62, and the lower end of the lower sleeve section 612 is spaced from the bottom of the shell 1.

[0065] like Figure 6 As shown, in the technical solution of the present invention, the support plate 62 is connected to the rotor part 42 of the motor 4 so that the support plate 62 can rotate together with the rotor part 42 to transmit power, and the sleeve body 61 connected to the support plate 62 can rotate together and transmit power. The lower sleeve section 612 extending beyond the lower side of the support plate 62 is connected to the crankshaft 5, and the power received by the sleeve body 61 can be transmitted to the crankshaft 5 in one step. When the crankshaft 5 rotates, the eccentric part 56 is driven to rotate together, so that the eccentric part 56 rotates and drives the connecting rod connected thereto to work in the cylinder 3. In this process, since the lower sleeve section 612 can be set to a sufficient length to increase the contact area with the crankshaft 5, the holding force at the contact point between the two can be increased, the wear on the crankshaft 5 can be reduced, and the reliability of the operation of the compressor 100 can be improved.

[0066] The sleeve body 61 of the shaft sleeve 6 has a lower sleeve section 612 that extends downwardly beyond the support plate 62. The lower sleeve section 612 can extend downward to utilize the space between the bottom of the motor 4 and the bottom of the casing 1. To this end, the lower sleeve section 612 increases the contact area between the sleeve body 61 and the crankshaft 5 without occupying additional height dimensions of the compressor 100. The setting height of the rotor component 42 is no longer limited by the length of the matching section with the crankshaft 5, thereby being able to reduce the height of the rotor component 42 while satisfying the reliability of the operation of the compressor 100, thereby ultimately reducing the overall height of the compressor 100.

[0067] It is understandable that in order to increase the connection strength between the support plate 62 and the sleeve 61, in one embodiment, the support plate 62 is integrally arranged with the sleeve 61. Such an arrangement can increase the firmness of the connection between the support plate 62 and the sleeve 61, thereby enabling the sleeve 6 to withstand greater external forces and improve the overall strength. In addition, it is worth mentioning that the integrated arrangement can simplify the manufacturing process, reduce assembly steps, improve production efficiency, and reduce costs. For example, the support plate 62 and the sleeve 61 can be formed in one go through a casting process to ensure the integrity and consistency of the structure; or the support plate 62 and the sleeve 61 can be directly processed on a piece of raw material through mechanical processing (such as turning, milling, etc.) to ensure the precise fit between the two.

[0068] Further, such as Figure 8 As shown, in one embodiment, the support plate 62 is provided with a mounting hole 621, and the mounting hole 621 is used to connect with one end of the rotor component 42 of the motor 4. In this way, by providing a fixing member in the mounting hole 621 and connecting it to the rotor component 42 of the motor 4, the support plate 62 and the rotor component 42 are fixed together, simplifying the installation process and improving work efficiency. For example, the fixing member can be selected as a rivet, and by directly driving the rivet into the mounting hole 621, the connection strength between the support plate 62 and the rotor component 42 can be improved, so that the support plate 62 will not be loosened from the rotor component 42 during high-speed rotation.

[0069] It is understandable that the sleeve hole is used for transmission connection with the crankshaft 5, and the shape of the sleeve hole can be adapted according to different rotation requirements of the crankshaft 5, such as cylindrical hole, conical hole, spline hole, elliptical, square, polygonal and special-shaped hole, which are not particularly limited here. The support plate 62 is connected between the sleeve body 61 and the rotor component 42 for transmitting power. The support plate 62 is adapted to the shape of the rotor component 42 to increase the contact area. The support plate 62 can better disperse the force and reduce local stress concentration, thereby reducing wear and extending the service life.

[0070] like Figure 7 As shown, in one embodiment, the upper end of the sleeve body 61 is arranged beyond the upper side of the support plate 62 to form an upper sleeve section 613 that exceeds the upper side of the support plate 62, and the upper sleeve section 613 extends into the through hole 43. In this way, through the transmission arrangement of the upper sleeve section 613 and the crankshaft 5, when the length of the matching section of the sleeve body 61 and the crankshaft 5 is kept constant, the length of the lower sleeve section 612 can be reduced by increasing the length of the upper sleeve section 613, thereby improving the flexibility of the sleeve 6. By extending the upper sleeve section 613 into the through hole 43, the inner space of the rotor component 42 can be further utilized, thereby reducing the length of the lower sleeve section 612, or when the length of the lower sleeve section 612 remains unchanged, the contact area between the sleeve 6 and the crankshaft 5 is further improved, and the holding force is further increased.

[0071] It can be understood that the outer side of the upper sleeve section 613 extending into the through hole 43 can be clearance-fitted or interference-fitted with the through hole 43 of the rotor component 42; when it is clearance-fitted, it is convenient to install the shaft sleeve 6 and the rotor component 42; when it is interference-fitted, the power of the rotor component 42 can be further transmitted to the crankshaft 5 through the upper sleeve section 613. In addition, it can further reduce the burden of the support plate 62 directly transmitting power, thereby reducing the wear and fatigue damage of the support plate 62 and extending its service life. In addition, it is worth mentioning that the lower sleeve section 612 and the upper sleeve section 613 are provided on both sides of the support plate 62. Since the lower sleeve section 612 and the upper sleeve section 613 are arranged relative to each other, a more stable transmission can be provided, reducing vibration and deformation under high load or high speed. Improve the reliability of the shaft sleeve 6 when in use.

[0072] Furthermore, in one embodiment, the length of the lower sleeve section 612 is greater than or equal to the length of the upper sleeve section 613. In this way, the position interference of the connection between the upper sleeve section 613 and the rotor component 42 can be reduced by the length of the lower sleeve section 612 being greater than the length of the upper sleeve section 613, thereby facilitating the reduction of the height of the rotor component 42.

[0073] In one embodiment, the crankshaft 5 includes a first mating section 51 and a second mating section 52 distributed in the up-down direction, the first mating section 51 is clearance-fitted with the mounting shaft hole 21, and the second mating section 52 is interference-fitted with the shaft sleeve 6; wherein the outer diameter of the second mating section 52 is larger than the outer diameter of the first mating section 51, and the outer diameter of the second mating section 52 is smaller than the inner diameter of the mounting shaft hole 21. Such a configuration enables the second mating section 52 to pass through the mounting shaft hole 21 and to have an interference fit with the shaft sleeve 6, thereby fixing the two together and transmitting the power of the rotor component 42. The second mating section 52 is to be matched with the shaft sleeve 6, so that, compared with the case where the outer diameters of the two are the same, the contact area between the second mating section 52 and the sleeve body 61 can be increased, thereby further increasing the connection stability between the two, and the first mating section 51 is clearance-fitted with the mounting shaft hole 21, so that lubricating oil can enter the rotation connection position of the two, thereby reducing the wear between the two caused by rotation.

[0074] In one embodiment, an extension portion 22 is extended from the lower end of the crankcase 2 into the through hole 43, and the mounting shaft hole 21 is set through the extension portion 22. In this way, the extension portion 22 can be used to support the rotation of the crankshaft 5, so that it can run more smoothly. It can be understood that since the extension portion 22 does not rotate, the length of the extension portion 22 can be flexibly set so as not to contact the shaft sleeve 6.

[0075] like Figure 5 and Fig.10 As shown, in one embodiment, the upper end of the crankshaft 5 is formed with a crankshaft blade 53 that protrudes laterally, the crankshaft blade 53 is located on the upper side of the crankcase 2, the eccentric portion 56 is arranged on the upper side of the crankshaft blade 53, and a rolling support structure 7 is arranged between the crankshaft blade 53 and the crankcase 2. With such an arrangement, the rolling support structure 7 makes the crankshaft blade 53 smoother and more stable when rotating. It can be understood that the crankshaft blade 53 can be partially or completely in contact with the rolling support structure 7. In addition, the rolling support structure 7 can be a retainer 72 bearing, a cylindrical roller bearing, a tapered roller bearing or an angular contact ball bearing, which can be selected according to actual needs and is not particularly limited here. Figure 4 and Figure 5As shown, further, in one embodiment, the rolling support structure 7 includes two annular support sheets 71 arranged in the up-down direction and a retainer 72 rollingly arranged between the two annular support sheets 71; the inner diameter of the two annular support sheets 71 is larger than the outer diameter of the lower end of the crankshaft 5. In this way, the retainer 72 rolls between the two annular support sheets 71, converting sliding friction into rolling friction, reducing friction, improving the efficiency of power transmission, and making the motor 4 run more efficiently. In addition, the inner diameter of the two annular support sheets 71 is larger than the outer diameter of the lower end of the crankshaft 5, so that the lower end of the crankshaft 5 can be installed through the annular support sheet 71, thereby improving production efficiency.

[0076] In one embodiment, the stator component 41 is arranged in a ring shape, and the rotor component 42 is arranged inside the stator component 41; the support plate 62 is connected to the lower end of the rotor component 42. In this way, the stator component 41 drives the rotor component 42 to rotate by generating a magnetic field. The through hole 43 provided in the rotor component 42 is used for the crankshaft 5 to pass through. The support plate 62 is connected to the lower end of the rotor component 42 for easy installation. The specific connection form can be bolt connection or welding, preferably riveting, and the riveting method can effectively improve the connection strength between the two.

[0077] like Figure 6 As shown, in order to reduce the leakage of the magnetic field at the rotor component 42 and improve the energy conversion efficiency, in some embodiments, the material of the support plate 62 can be made of a magnetic-insulating material; or the material of the sleeve 6 can be made of a magnetic-insulating material; or a magnetic-insulating member can be provided between the rotor component 42 and the support plate 62 to reduce the leakage of the magnetic field. The above-mentioned embodiments can be provided separately or in combination, and are not particularly limited here. In addition, it is worth mentioning that when the support plate 62 or the sleeve 6 is provided with a magnetic-insulating material, the energy loss caused by the eddy current phenomenon can be reduced. The eddy current is a current caused by a changing magnetic field in a conductive material, which can cause energy loss and heat generation.

[0078] In order to reduce the wear on the crankshaft 5, in one embodiment, the thickness of the sleeve 6 is greater than or equal to 13.5 mm; in this way, by making the thickness of the sleeve 6 greater than or equal to 13.5 mm, there can be a sufficient matching distance between the sleeve and the crankshaft 5, so that there is a sufficient contact area between the two, thereby increasing the holding force at the contact point between the two, reducing the wear on the crankshaft 5, and improving the reliability of the operation of the compressor 100. The specific length can be set to 13.5 mm, 15 mm, 17 mm, 18 mm or 19 mm.

[0079] In order to improve the connection strength between the support plate 62 and the rotor component 42, in one embodiment, the thickness of the support plate 62 is greater than or equal to 1.5 mm; in this way, by making the thickness of the support plate 62 greater than or equal to 1.5 mm, sufficient thickness support can be provided to improve the connection strength, so that in the process of transmitting the power of the rotor component 42 to the crankshaft 5, the stress can be better dispersed, the risk of local stress concentration can be reduced, and the overall durability and reliability can be improved. The specific length can be set to 1.5 mm, 2.5 mm, 3 mm or 4 mm.

[0080] In order to improve the insulation performance between the stator component 41 and the crankcase 2. In one embodiment, the crankcase 2 is spaced from the upper end of the motor 4, and an electrical gap 8 is reserved at least in the area corresponding to the upper end of the stator component 41, and the electrical gap 8 is greater than or equal to 3mm. In this way, by setting the electrical gap 8 to be greater than or equal to 3mm, the electrical gap 8 between the crankcase 2 and the stator component 41 can be guaranteed to reserve a sufficient insulation distance to prevent breakdown caused by voltage difference, that is, to avoid the current flowing through the air or other media, causing safety hazards of short circuit or arc discharge, and improve the insulation performance between the stator component 41 and the crankcase 2. The electrical gap 8 can be set to 3mm, 5mm and 6mm, and the specific value is not particularly limited here, subject to the design requirements of actual use.

[0081] like Figure 5 and Fig. 9 As shown, in one embodiment, a main shaft oil hole 54 is provided inside the lower part of the crankshaft 5, and a first oil groove 55 arranged in a spiral is provided on the outer side of the first mating section 51 of the crankshaft 5. With such an arrangement, when the crankshaft 5 rotates, the lubricating oil in the main shaft oil hole 54 can be transported along the first oil groove 55 to the rotation connection between the crankshaft 5 and the crankcase 2, thereby reducing the wear between the two and improving the service life. In addition, in one embodiment, the eccentric portion 56 of the crankshaft 5 is provided with a second oil groove 57, and the first oil groove 55 is connected to the second oil groove 57, so as to lubricate the rotation connection between the eccentric portion 56 and the connecting rod.

[0082] Since some gas is mixed in the lubricating oil, the lubrication effect of the spindle oil hole 54 will be reduced when the lubricating oil is sucked in. Therefore, in one embodiment, an exhaust channel 58 connected to the spindle oil hole 54 is also opened inside the upper end of the crankshaft 5. The exhaust channel 58 can discharge the gas in the spindle oil hole 54 to improve the purity of the lubricating oil and provide guarantee for the lubrication effect of subsequent work.

[0083] Specifically, in one embodiment, the exhaust passage 58 is arranged gradually away from the axis of the crankshaft 5. In this way, the gas in the main shaft oil hole 54 can be quickly thrown out of the exhaust passage 58 under the action of the rotation force, which is beneficial to improve the purity of the lubricating oil.

[0084] The present invention also proposes a refrigeration device, which includes a compressor 100. The specific structure of the compressor 100 refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0085] It is understandable that the refrigeration equipment may be in various forms such as refrigerators, air conditioners, cold storages, refrigerated trucks, and refrigerated cabinets. These devices all utilize the refrigeration principle and meet different refrigeration needs through different structures and designs, and will not be described in detail here.

[0086] In an embodiment of the present invention, the refrigeration device is a refrigerator. In actual application, the internal structure of the refrigerator can be optimized when the refrigeration capacity is determined, so that the volume can be reduced without reducing the refrigeration capacity. The volume ratio of the refrigerator can also be increased on the basis of a fixed external size of the refrigerator, so as to ensure a sufficiently large working volume (also used for the space of the refrigeration and freezing compartments), thereby bringing better economic value.

[0087] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention and the drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A compressor, characterized in that: include: case; A crankcase, arranged on the housing, wherein the crankcase is provided with a mounting shaft hole extending vertically therethrough; a cylinder located in the housing and disposed on an upper side of the crankcase; A motor, located in the housing and arranged at the lower side of the crankcase, the motor comprising a stator component and a rotor component, and the motor is provided with through holes arranged through the upper and lower ends thereof; A crankshaft is located in the housing and rotatably cooperates with the mounting shaft hole, an eccentric portion connected to the connecting rod of the cylinder is provided at the upper end of the crankshaft, and a lower end of the crankshaft extends from the lower end of the motor through the through hole; and The sleeve comprises a sleeve body and a support plate, the sleeve body is provided with a sleeve hole penetrating through the upper and lower ends thereof, the sleeve hole is interference fit with the lower end of the crankshaft, the support plate is arranged on the outer side of the sleeve body, the support plate is located at the lower end of the motor and is connected to the rotor component, the lower end of the sleeve body is arranged beyond the lower side of the support plate to form a lower sleeve section exceeding the lower side of the support plate, and the lower end of the lower sleeve section is spaced apart from the bottom of the shell.

2. The compressor according to claim 1, characterized in that The upper end of the sleeve body is arranged beyond the upper side of the support plate to form an upper sleeve section beyond the upper side of the support plate, and the upper sleeve section extends into the through hole.

3. The compressor according to claim 2, characterized in that The length of the lower sleeve section is greater than or equal to the length of the upper sleeve section.

4. The compressor according to claim 1, characterized in that The crankshaft comprises a first matching section and a second matching section distributed in the up-down direction, the first matching section is clearance-matched with the mounting shaft hole, and the second matching section is interference-matched with the shaft sleeve; Wherein, the outer diameter of the second fitting segment is greater than the outer diameter of the first fitting segment, and the outer diameter of the second fitting segment is smaller than the inner diameter of the mounting shaft hole.

5. The compressor according to claim 1 or 4, characterized in that: An extension portion is extended from the lower end of the crankcase into the through hole, and the mounting shaft hole is arranged through the extension portion.

6. The compressor according to claim 5, characterized in that The upper end of the crankshaft is formed with a crankshaft blade protruding laterally, the crankshaft blade is located on the upper side of the crankcase, the eccentric portion is arranged on the upper side of the crankshaft blade, and a rolling support structure is arranged between the crankshaft blade and the crankcase.

7. The compressor according to claim 6, characterized in that The rolling support structure comprises two annular support sheets arranged in the up-down direction and a retaining frame rollingly arranged between the two annular support sheets; The inner diameter of the two annular support plates is greater than the outer diameter of the lower end of the crankshaft.

8. The compressor according to claim 1, characterized in that The stator component is arranged in a ring shape, and the rotor component is arranged inside the stator component; The support plate is connected to the lower end of the rotor component.

9. The compressor according to claim 1, characterized in that The support plate is made of a magnetically isolating material; and / or, The material of the shaft sleeve is a magnetic isolation material; and / or, A magnetic isolation member is arranged between the rotor component and the support plate.

10. The compressor according to claim 1, characterized in that The thickness of the sleeve is greater than or equal to 13.5 mm; and / or, The thickness of the support plate is greater than or equal to 1.5 mm; and / or, The crankcase is spaced apart from the upper end of the motor, and an electrical gap is reserved at least in a region corresponding to the upper end of the stator component, and the electrical gap is greater than or equal to 3 mm.

11. A refrigeration device, characterized in that: Comprising a compressor as claimed in any one of claims 1 to 10.

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