Refrigerator compressor and refrigeration device

Abstract

The application discloses a refrigerator compressor and refrigeration equipment, and relates to the technical field of refrigeration equipment, wherein the refrigerator compressor comprises a shell, a crankcase, a motor, a crankshaft and a connecting rod; the crankcase comprises a crankshaft support and a cylinder support; the crankshaft support is connected to the shell; an axle hole is arranged on the crankshaft support; a piston hole is arranged on the cylinder support; the crankshaft is in transmission connection with the motor; the crankshaft is connected to the axle hole; the connecting rod comprises a crankshaft end and a piston end; the crankshaft end is in transmission connection with the crankshaft; the piston end is used for connecting a piston and driving the piston to reciprocate in the piston hole; the motor and the cylinder support are arranged in parallel in the axial direction of the piston hole; and the technical scheme provided by the application reduces the overall height of the refrigerator compressor.

Description

Technical Field

[0001] This invention relates to the technical field of refrigeration equipment, and particularly to a refrigerator compressor and refrigeration equipment. Background Technology

[0002] Reference Figure 1 Compressor miniaturization is a market trend, and the height of existing compressors is generally above 123mm. The height of the compressor restricts the utilization of refrigerator volume. Existing compressors are all reciprocating structures, that is, the piston and motor of the compressor are arranged vertically. The upper part is the crankcase head for housing the piston structure, and the lower part is the crankshaft mounting part for housing the motor crankshaft. The highest point inside the compressor is the crankcase cylinder head, which greatly restricts the overall height of the compressor. Summary of the Invention

[0003] The main objective of this invention is to provide a refrigerator compressor and refrigeration equipment that aims to reduce the overall height of the refrigerator compressor.

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

[0005] case;

[0006] A crankcase, comprising a crankshaft bracket and a cylinder bracket, wherein the crankshaft bracket is connected to the housing, the crankshaft bracket has a shaft hole, and the cylinder bracket has a piston hole;

[0007] The system includes a motor, a crankshaft, and a connecting rod. The crankshaft is drivenly connected to the motor and is connected to the shaft hole. The connecting rod includes a crankshaft end and a piston end. The crankshaft end is drivenly connected to the crankshaft, and the piston end is used to connect to the piston and drive the piston to reciprocate within the piston hole. The motor and the cylinder bracket are arranged side by side along the axial direction of the piston hole.

[0008] In one embodiment, the shortest distance between the end of the cylinder bracket facing the crankshaft bracket and the outer peripheral surface of the motor is s, where s ≥ 1 mm.

[0009] In one embodiment, the shortest distance between the center plane of the stator of the motor in the horizontal direction and the axis of the piston hole is H1, where 1mm ≤ H1 < 20mm.

[0010] In one embodiment, the shortest distance between the axis of the crankshaft end and the axis of the piston bore is H2, where 5mm ≤ H2 < 19mm.

[0011] In one embodiment, the perpendicularity between the crankshaft bracket and the cylinder bracket is 0.1 mm.

[0012] In one embodiment, the housing has a mounting cavity, in which the crankcase, the motor, the crankshaft, and the connecting rod are all located. The maximum height of the housing is H3, and 80mm≤H3≤95mm.

[0013] In one embodiment, the housing includes an upper housing and a lower housing connected to each other. The upper housing and the lower housing enclose the mounting cavity. The lower housing is provided with a mounting part for connecting to the outside. The shortest distance between the highest point of the upper housing and the mounting part is H4, where 70mm≤H4≤95mm.

[0014] In one embodiment, the refrigerator compressor further includes a planar bearing, and the crankshaft bracket is provided with a mounting groove, the mounting groove being disposed around the outer periphery of the shaft hole. The crankshaft bracket is rotatably connected to the crankshaft through the planar bearing, and the planar bearing is located within the mounting groove.

[0015] In one embodiment, the crankshaft support is provided with a clearance hole, and the piston end extends through the clearance hole into the piston bore.

[0016] The present invention also proposes a refrigeration device, including a refrigerator compressor as described above.

[0017] The refrigerator compressor in this invention includes a housing, a crankcase, a motor, a crankshaft, and a connecting rod. The crankcase includes a crankshaft bracket and a cylinder bracket. The crankshaft bracket is connected to the housing and has a shaft hole. The cylinder bracket has a piston hole. The crankshaft is driven by the motor and connected to the shaft hole. The connecting rod includes a crankshaft end and a piston end. The crankshaft end is driven by the crankshaft, and the piston end is used to connect to the piston and drive the piston to reciprocate within the piston hole, thereby compressing the refrigerant and discharging it from the cylinder. Furthermore, the motor and cylinder bracket are arranged side-by-side along the axial direction of the piston hole, i.e., horizontally. Compared to the prior art where the motor and cylinder are stacked vertically, this invention arranges the motor and cylinder horizontally, thereby reducing the overall height of the refrigerator compressor, lowering its center of gravity, reducing vibration amplitude, and consequently reducing noise during operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of a refrigerator compressor in the prior art;

[0020] Figure 2 A cross-sectional view of the refrigerator compressor provided by the present invention;

[0021] Figure 3 for Figure 2 A schematic diagram of the structure of the crankcase.

[0022] Explanation of icon numbers:

[0023] 11. Upper housing; 12. Lower housing; 20. Crankcase; 21. Crankshaft bracket; 211. Shaft hole; 212. Mounting groove; 214. Clearance hole; 22. Cylinder bracket; 221. Piston hole; 31. Motor; 311. Stator; 32. Crankshaft; 33. Connecting rod; 331. Crankshaft end; 332. Piston end.

[0024] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] 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 positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0027] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0028] Reference Figure 1 Currently, the height of existing compressors is generally above 123mm. The height of the compressor restricts the utilization of the refrigerator's volume. Existing compressors are all reciprocating structures, meaning that the compressor's piston and motor are arranged vertically. The upper part is the crankcase head for housing the piston structure, and the lower part is the crankshaft mounting part for mounting the motor crankshaft. The highest point inside the compressor is the crankcase cylinder head, which significantly restricts the overall height of the compressor.

[0029] Reference Figure 2 and Figure 3 To solve the above-mentioned technical problems, the present invention proposes a refrigerator compressor, comprising:

[0030] case;

[0031] A crankcase 20, comprising a crankshaft bracket 21 and a cylinder bracket 22, wherein the crankshaft bracket 21 is connected to the housing, the crankshaft bracket 21 is provided with a shaft hole 211, and the cylinder bracket 22 is provided with a piston hole 221;

[0032] The system includes a motor 31, a crankshaft 32, and a connecting rod 33. The crankshaft 32 is drivenly connected to the motor 31 and is connected to the shaft hole 211. The connecting rod 33 includes a crankshaft end 331 and a piston end 332. The crankshaft end 331 is drivenly connected to the crankshaft 32, and the piston end 332 is used to connect to the piston and drive the piston to reciprocate within the piston hole 221. The motor 31 and the cylinder bracket 22 are arranged side by side along the axial direction of the piston hole 221.

[0033] The refrigerator compressor in the technical solution of the present invention includes a housing, a crankcase 20, a motor 31, a crankshaft 32, and a connecting rod 33. The crankcase 20 includes a crankshaft bracket 21 and a cylinder bracket 22. The crankshaft bracket 21 is connected to the housing and has a shaft hole 211. The cylinder bracket 22 has a piston hole 221. The crankshaft 32 is drivenly connected to the motor 31 and is connected to the shaft hole 211. The connecting rod 33 includes a crankshaft end 331 and a piston end 332. The crankshaft end 331 is drivenly connected to the crankshaft 32. The piston end 332 is used to connect to the piston and drive the piston to reciprocate within the piston hole 221, thereby compressing the refrigerant and discharging it from the cylinder. Furthermore, the motor 31 and the cylinder bracket 22 are arranged side by side in the axial direction of the piston hole 221, that is, the motor 31 and the cylinder bracket 22 are arranged side by side in the horizontal direction. Compared with the prior art solution in which the motor 31 and the cylinder are stacked vertically, the technical solution of this application arranges the motor 31 and the cylinder side by side in the horizontal direction, thereby reducing the overall height of the refrigerator compressor, thereby lowering the center of gravity of the refrigerator compressor, thereby reducing the vibration amplitude of the refrigerator compressor, and thus reducing the noise generated by the refrigerator compressor during operation.

[0034] It should be noted that the motor 31 and the cylinder bracket 22 are arranged side by side in the axial direction of the piston hole 221. This means that the projections of the motor 31 and the cylinder bracket 22 on the plane perpendicular to the horizontal plane at least partially overlap. That is, the motor 31 and the cylinder bracket 22 can be arranged side by side in the axial direction of the piston hole 221, or one of the motor 31 and the cylinder bracket 22 can completely contain the other in the side by side.

[0035] Specifically, the shortest distance between the end of the cylinder bracket 22 facing the crankshaft bracket 21 and the outer peripheral surface of the motor 31 is s, where s≥1mm. Understandably, the two ends of the connecting rod 33 are the crankshaft end 331 and the piston end 332, respectively. The crankshaft end 331 is connected to the crankshaft 32, and the piston end 332 is used to connect to the piston. The piston end 332 is slidably connected to the piston hole 221 through the piston. Since the cylinder bracket 22 and the motor 31 are arranged side by side in the horizontal direction, and the piston hole 221 and the motor 31 are at least partially arranged side by side in the horizontal direction, there is a height difference between the piston hole 221 and the crankshaft end 331. Therefore, the connecting rod 33 is not straight. If s < 1mm, it will cause the distance between the motor 31 and the piston hole 221 to be too close. The connecting rod 33 reciprocates along the axis of the piston hole 221 within the piston hole 221. Therefore, the connecting rod 33 will have room for movement along the axis of the piston hole 221. If s < 1mm, on the one hand, it will cause the motor 31 to have a large interference with the movement of the connecting rod 33, and on the other hand, it will cause the movement space of the connecting rod 33 to be too small, thereby reducing the displacement of the refrigerator compressor. The connecting rod 33 can be composed of multiple straight segments, multiple arc segments, or a combination of some straight segments and some arc segments. In short, there is a height difference between the crankshaft end and the piston section of the connecting rod.

[0036] Preferably, the shortest distance between the center plane of the stator 311 of the motor 31 in the horizontal direction and the axis of the piston hole 221 is H1, where 1mm ≤ H1 < 20mm. Understandably, if H1 ≥ 20mm, it means that the projections of the motor 31 and the cylinder bracket 22 in the direction perpendicular to the horizontal plane overlap less. That is, although the motor 31 and the cylinder bracket 22 are still arranged side-by-side in the axial direction of the piston hole 221, the side-by-side portion of the motor 31 and the cylinder bracket 22 is smaller, thus still resulting in a relatively high overall height of the compressor, which is not conducive to reducing the overall height of the refrigerator compressor. If H1 < 1mm, it will cause the cylinder bracket 22 to be too close to the center plane of the stator 311 of the motor 31, resulting in the cylinder bracket 22 being set too low. This will cause the lower end face of the cylinder bracket 22 to protrude beyond the lower end face of the motor 31, which will still result in a relatively high overall height of the refrigerator compressor, thus not conducive to reducing the overall height of the refrigerator compressor. Therefore, by setting 1mm≤H1<20mm, the shortest distance between the center plane of the stator 311 of the motor 31 and the axis of the piston hole 221 is reasonably set, thereby reducing the overall height of the refrigerator compressor, lowering the center of gravity of the refrigerator compressor, reducing the vibration amplitude of the refrigerator compressor, and thus reducing the noise generated by the refrigerator compressor during operation.

[0037] Preferably, the shortest distance between the axis of the crankshaft end 331 and the axis of the piston hole 221 is H2, where 5mm ≤ H2 < 19mm. Understandably, if H2 ≥ 19mm, it indicates that the projections of the motor 31 and the cylinder bracket 22 in the direction perpendicular to the horizontal plane overlap less. That is, although the motor 31 and the cylinder bracket 22 are still arranged side-by-side in the axial direction of the piston hole 221, the side-by-side portion of the motor 31 and the cylinder bracket 22 is less, thus still resulting in a relatively high overall height of the compressor, which is not conducive to reducing the overall height of the refrigerator compressor. If H2 < 5mm, it indicates that the cylinder bracket 22 is too high, resulting in the axis of the piston hole 221 being too close to the axis of the crankshaft end 331. This would cause the upper surface of the cylinder bracket 22 to be higher than the upper surface of the crankshaft end 331, which would still result in a relatively high overall height of the refrigerator compressor, thus not conducive to reducing the overall height of the refrigerator compressor. Therefore, by setting 5mm≤H2<19mm, the overall height of the refrigerator compressor is reduced by reasonably setting the shortest distance between the axis of the crankshaft end 331 and the axis of the piston hole 221, thereby lowering the center of gravity of the refrigerator compressor, reducing the vibration amplitude of the refrigerator compressor, and thus reducing the noise generated by the refrigerator compressor during operation.

[0038] Understandably, the crankshaft end of the connecting rod rotates under the drive of the crankshaft, and the piston end of the connecting rod reciprocates within the piston bore. If the angle between the crankshaft support and the cylinder support deviates too much from 90°, the connecting rod may easily jam within the piston bore, thus affecting the normal operation of the connecting rod and the refrigerator compressor. Therefore, in one embodiment of this application, the perpendicularity between the crankshaft support 21 and the cylinder support 22 is 0.1mm. Understandably, during the design phase, the crankshaft support 21 and the cylinder support 22 are set perfectly perpendicular. However, certain errors are inevitable during actual manufacturing. Therefore, the crankshaft support 21 and the cylinder support 22 will not be perfectly perpendicular. Hence, the perpendicularity between the crankshaft support 21 and the cylinder support 22 is set to 0.1mm. Here, 0.1mm perpendicularity means that the tilt of the crankshaft support 21 relative to the cylinder support 22 at its maximum must not exceed 0.1mm. Understandably, by machining the perpendicularity of the crankshaft support 21 and cylinder support 22 to 0.1mm, the sliding of the connecting rod 33 within the piston bore 221 becomes smoother, reducing friction and wear caused by the non-perpendicularity of the cylinder support 22 and crankshaft support 21. This improves the operating accuracy of the connecting rod 33, thereby extending the service life of the refrigerator compressor, reducing energy loss due to friction and wear, and ultimately improving the energy efficiency of the entire mechanical system. Conversely, if the crankshaft support 21 and cylinder support 22 are not perpendicular, additional stress and deformation will occur between the connecting rod 33 and cylinder support 22 during the operation of the piston end 332 of the connecting rod 33 within the piston bore 221, affecting the normal operation of the machinery. Alternatively, in another embodiment, the included angle between the crankshaft support and cylinder support can be limited, such as between 89.5° and 90.5°, or between 89° and 91°.

[0039] Specifically, the housing has an installation cavity, within which the crankcase 20, motor 31, crankshaft 32, and connecting rod 33 are all located. The maximum height of the housing is H3, where 80mm ≤ H3 ≤ 95mm. This maximum height is also the maximum height of the entire refrigerator compressor. By arranging the motor 31 and cylinder bracket 22 side-by-side in the horizontal direction (i.e., arranging the motor 31 and piston structure side-by-side in the horizontal direction), compared to existing technologies where the motor 31 and piston are arranged vertically, resulting in a compressor height of 123mm or more, the refrigerator compressor in this application has a height between 80mm and 95mm. This significantly reduces the overall height of the refrigerator compressor, thereby lowering its center of gravity, reducing vibration amplitude, and ultimately reducing noise during operation. It should be noted that the maximum height of the housing is the shortest distance between the cross-section of the highest point of the upper housing 11 and the cross-section of the lowest point of the lower housing 12.

[0040] Specifically, the housing includes an upper housing 11 and a lower housing 12 connected to each other. The upper housing 11 and the lower housing 12 enclose the mounting cavity. The lower housing 12 is provided with a mounting part for connection to the outside. The shortest distance between the highest point of the upper housing 11 and the mounting part is H4, where 70mm≤H4≤95mm. Understandably, the upper housing 11 and the lower housing 12 are arc-shaped. The lower housing 12 is also provided with a mounting part for mounting the refrigerator compressor. The mounting part can be used to connect external devices or mounting bases, etc. Therefore, the shortest distance between the highest point of the upper housing 11 and the mounting part is actually the installation height of the refrigerator compressor, that is, the actual height space occupied by the refrigerator compressor after installation. Because the dimensions of the mounting base and external devices used for connection to the mounting part do not change significantly in the design process of different refrigerator compressors, this further reduces the overall height of the refrigerator compressor, making the installed refrigerator compressor even lower. This further lowers the center of gravity of the refrigerator compressor, thereby reducing the vibration amplitude of the refrigerator compressor and the noise generated during operation.

[0041] In one embodiment, the refrigerator compressor further includes a planar bearing, and the crankshaft bracket 21 is provided with a mounting groove 212. The mounting groove 212 is arranged around the outer periphery of the shaft hole 211. The crankshaft bracket 21 is rotatably connected to the crankshaft 32 through the planar bearing, and the planar bearing is located in the mounting groove 212.

[0042] The planar bearing ensures a stable connection between the crankshaft 32 and the bearing bracket, while allowing the crankshaft 32 to move axially within a certain range. This improves the stability of the connecting rod 33 during operation and reduces the problem of piston end 332 of the connecting rod 33 jamming due to vertical errors between the crankshaft bracket 21 and the cylinder. This, in turn, enhances the stability of the connecting rod 33 during operation, thereby improving the stability and reliability of the refrigerator compressor. Furthermore, compared to the prior art where the planar bearing is placed on the upper surface of the crankshaft bracket, the present application's solution places the planar bearing within the mounting groove 212. This reduces the axial space occupied by the planar bearing, thereby reducing the overall height of the refrigerator compressor. The resulting lower height further lowers the center of gravity of the refrigerator compressor, reducing its vibration amplitude and consequently reducing the noise generated during operation.

[0043] In one embodiment, the crankshaft bracket 21 is provided with a clearance hole 214, and the piston end 332 extends through the clearance hole 214 into the piston hole 221. Understandably, since the cylinder bracket 22 and the motor 31 are arranged side-by-side, at least part of the piston hole 221 is located below the upper surface of the crankshaft bracket 21. The crankshaft end 331 of the connecting rod 33 rotates under the drive of the crankshaft 32, and the piston end 332 of the connecting rod 33 reciprocates along the axial direction of the piston hole 221. Therefore, the crankshaft end 331 is located above the crankshaft bracket 21, and the piston end 332 is at least partially located below the crankshaft bracket 21. Thus, the clearance hole 214 is necessary to increase the movement space of the connecting rod 33, thereby reducing interference with the connecting rod 33 and improving the stability of the refrigerator compressor operation.

[0044] This invention also proposes a refrigeration device, which includes a refrigerator compressor. The specific structure of the refrigerator compressor is as described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here. The refrigeration device can be configured as a refrigerator, freezer, or other similar equipment.

[0045] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A refrigerator compressor, characterized in that, include: case; A crankcase, comprising a crankshaft bracket and a cylinder bracket, wherein the crankshaft bracket is connected to the housing, the crankshaft bracket has a shaft hole, and the cylinder bracket has a piston hole; The system includes a motor, a crankshaft, and a connecting rod. The crankshaft is drivenly connected to the motor and is connected to the shaft hole. The connecting rod includes a crankshaft end and a piston end. The crankshaft end is drivenly connected to the crankshaft, and the piston end is used to connect to the piston and drive the piston to reciprocate within the piston hole. The motor and the cylinder bracket are arranged side by side along the axial direction of the piston hole.

2. The refrigerator compressor as described in claim 1, characterized in that, The shortest distance between the end of the cylinder bracket facing the crankshaft bracket and the outer peripheral surface of the motor is s, where s ≥ 1 mm.

3. The refrigerator compressor as described in claim 1, characterized in that, The shortest distance between the center plane of the stator of the motor in the horizontal direction and the axis of the piston hole is H1, where 1mm≤H1<20mm.

4. The refrigerator compressor as described in claim 1, characterized in that, The shortest distance between the axis of the crankshaft end and the axis of the piston bore is H2, where 5mm ≤ H2 < 19mm.

5. The refrigerator compressor as described in claim 1, characterized in that, The perpendicularity between the crankshaft bracket and the cylinder bracket is 0.1 mm.

6. The refrigerator compressor as described in claim 1, characterized in that, The housing has an installation cavity, in which the crankcase, the motor, the crankshaft, and the connecting rod are all located. The maximum height of the housing is H3, and 80mm≤H3≤95mm.

7. The refrigerator compressor as described in claim 6, characterized in that, The housing includes an upper housing and a lower housing connected to each other. The upper housing and the lower housing enclose the mounting cavity. The lower housing is provided with a mounting part for connecting to the outside. The shortest distance between the highest point of the upper housing and the mounting part is H4, where 70mm≤H4≤95mm.

8. The refrigerator compressor as described in claim 1, characterized in that, The refrigerator compressor also includes a planar bearing. The crankshaft bracket is provided with a mounting groove, which is arranged around the outer periphery of the shaft hole. The crankshaft bracket is rotatably connected to the crankshaft through the planar bearing, and the planar bearing is located in the mounting groove.

9. The refrigerator compressor as described in claim 1, characterized in that, The crankshaft bracket is provided with a clearance hole, and the piston end extends through the clearance hole into the piston bore.

10. A refrigeration device, characterized in that, Includes a refrigerator compressor as described in any one of claims 1 to 9.

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