Rolling rotor type compressor
By setting specific hole balance imbalance measurements on the cylinders of the rolling rotor compressor, combined with the new layout of the motor and pump body, the existing rolling rotor compressor requires a high balance block and axial height, and the optimization of vibration and noise and height reduction are achieved.
Patent Information
- Application Number
- CN202510376022.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2025-07-25
AI Technical Summary
Existing rolling rotor compressors require balancing blocks and a high axial height, which is difficult to meet the requirements of portable refrigeration equipment for the height, weight, performance and vibration noise of the compressor.
By providing the first hole to balance the imbalance caused by the spring hole and the blade groove on the cylinder, the second hole and the third hole to balance the imbalance caused by the exhaust valve seat, the rotating assembly composed of the rotor and the pump body achieves static balance and dynamic balance, without additional balance blocks, and the motor sleeve is placed outside the pump body, changing the traditional up and down arrangement method.
Optimizes vibration and noise during compressor operation, reduces the axial height of the compressor, simplifies assembly procedures and improves the performance of the entire machine.
Smart Images
Figure CN120367813A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of compressors, and particularly relates to a rolling piston compressor. Background Art
[0002] In fields such as portable refrigeration, such as air-conditioning clothing, mobile refrigerators, etc., there are high requirements for the height, weight, performance, vibration and noise of compressors. It is desired that the compressor has a short height, light weight, high performance, and low vibration and noise.
[0003] The existing rolling piston single-cylinder compressor includes a motor, a pump body, a housing, and upper and lower housing covers; the motor includes a stator assembly and a rotor assembly (the rotor assembly is mainly composed of a rotor core, a magnet, and a balance weight); the pump body mainly includes an upper cylinder head, a cylinder, a lower cylinder head, a crankshaft, a piston, and a vane; the pump body is located below the motor, and the operation of the motor drives the pump body to work to compress the refrigerant. Due to the existence of the eccentric part of the crankshaft, the balance weights installed on the rotor usually include an upper balance weight and a lower balance weight, and the balance weights can make the rotating assembly composed of the rotor assembly and the crankshaft achieve static balance (static balance means that the center of gravity of the rotating assembly is located on the axis of the crankshaft when the rotating assembly is stationary) and dynamic balance (dynamic balance means that the rotating assembly can achieve a torque balance state when the rotating assembly is rotating).
[0004] For the above-mentioned existing rolling piston single-cylinder compressor, the vibration has no advantage compared with the reciprocating piston compressor. It is necessary to develop a double-cylinder compressor to meet the vibration requirements. However, the double-cylinder structure will inevitably cause an increase in the height of the pump body, an increase in the overall height of the compressor, and an increase in weight. Summary of the Invention
[0005] The present invention provides a rolling piston compressor to solve the technical problems that the existing rolling piston compressor needs to be equipped with balance weights and has a relatively high axial height.
[0006] To solve the above technical problems, the present invention provides a rolling piston compressor, including a housing, a pump body, and a motor. The housing has a cavity, the pump body and the motor are both arranged in the cavity, the motor is sleeved outside the pump body, the pump body includes an upper cylinder head, a cylinder, a lower cylinder head, a crankshaft, and an exhaust valve seat. The two ends of the crankshaft are respectively fixedly connected to the housing. The cylinder is provided with a spring hole and a vane groove that communicate with each other. The cylinder is provided with a first hole. In the circumferential direction of the cylinder, the first hole is arranged on the opposite side of the spring hole; second holes and third holes are respectively arranged on the two end faces of the cylinder. In the circumferential direction of the cylinder, the second hole is arranged on the opposite side of the exhaust valve seat.
[0007] Preferably, the first hole penetrates through the two end faces of the cylinder along the axial direction parallel to the crankshaft, or
[0008] The first holes are respectively arranged at the same axial positions on both end faces of the cylinder, and the first holes on both sides are not communicated with each other.
[0009] Preferably, an exhaust valve seat is arranged on the upper cylinder head or the lower cylinder head;
[0010] In the circumferential direction of the cylinder, the third hole is arranged on the same side of the exhaust valve seat;
[0011] And in the axial direction of the cylinder, the second hole is arranged on the end face of the cylinder close to the exhaust valve seat, and the third hole is arranged on the end face of the cylinder away from the exhaust valve seat.
[0012] Preferably, exhaust valve seats are arranged on both the upper cylinder head and the lower cylinder head;
[0013] In the circumferential direction of the cylinder, the third hole is arranged on the opposite side of the exhaust valve seat.
[0014] Preferably, the number of the first holes is multiple.
[0015] Preferably, some of the first holes among the multiple first holes are communicated with each other.
[0016] Preferably, the numbers of the second hole and the third hole are both multiple.
[0017] Preferably, some of the multiple second holes are communicated with each other, and / or
[0018] Some of the multiple third holes are communicated with each other.
[0019] Preferably, in a plane perpendicular to the crankshaft, the projection of the pump body is entirely located inside the projection of the motor.
[0020] Preferably, the motor includes a stator assembly and a rotor, and the axial magnetic center of the rotor is lower than the axial magnetic center of the stator assembly.
[0021] A rolling rotor type compressor provided by the present invention balances the unbalance amount caused by the spring hole and the vane slot through the first hole, and balances the unbalance amount caused by the exhaust valve seat through the second hole and the third hole, so that the rotating assembly composed of the rotor and the pump body (excluding the crankshaft) can achieve static balance and dynamic balance, and the vibration and noise during the operation of the compressor can be optimized without additionally adding balance blocks. The motor is sleeved outside the pump body, and the motor and the pump body are no longer arranged up and down as in the prior art, so that the axial height of the rolling rotor type compressor can be significantly reduced. Description of the Drawings
[0022] Figure 1 It is a schematic structural diagram of a rolling piston compressor provided by an embodiment of the present invention.
[0023] Figure 2 It is a schematic structural diagram of a single-exhaust cylinder provided by an embodiment of the present invention.
[0024] Figure 3 is Figure 2 the A-A cross-sectional view of
[0025] Figure 4 It is a schematic structural diagram of a double-exhaust cylinder provided by an embodiment of the present invention.
[0026] Figure 5 is Figure 4 the A-A cross-sectional view of
[0027] The reference numerals are as follows:
[0028] Shell - 1, pump body - 2, motor - 3, exhaust pipe - 4, lower muffler - 5;
[0029] Upper cylinder head - 21, cylinder - 22, lower cylinder head - 23, crankshaft - 24, exhaust valve seat - 25;
[0030] First hole - 221, second hole - 222, third hole - 223, spring hole - 224, vane slot - 225, upper end face of the cylinder - 226, lower end face of the cylinder - 227, first exhaust port - 228, second exhaust port - 229;
[0031] Suction passage - 241, upper thrust surface - 242, lower thrust surface - 243;
[0032] Stator assembly - 31, rotor - 32;
[0033] Axial magnetic center of the stator assembly - 311, axial magnetic center of the rotor - 321. Detailed implementation manners
[0034] To make the objectives, advantages and features of the present invention clearer, the following further describes in detail a rolling piston compressor proposed by the present invention with reference to the accompanying drawings. It should be noted that the accompanying drawings are all in very simplified forms and use non-precise scales, only for conveniently and clearly assisting in explaining the objectives of the embodiments of the present invention.
[0035] In the description of the present invention, the qualifier terms such as "first", "second", etc. are added for convenient description and reference, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with the qualifier terms such as "first", "second", etc. may explicitly or implicitly include one or more of such features.
[0036] As shown Figures 1 to 3 in the figure, this embodiment provides a rolling rotor compressor, which includes a housing 1, a pump body 2 and a motor 3. The housing 1 has a cavity, and both the pump body 2 and the motor 3 are arranged in the cavity. The motor 3 is sleeved outside the pump body 2. The pump body 2 includes an upper cylinder head 21, a cylinder 22, a lower cylinder head 23, a crankshaft 24 and an exhaust valve seat 25. Both ends of the crankshaft 24 are fixedly connected to the housing 1. The cylinder 22 is provided with a spring hole 224 and a vane slot 225 that communicate with each other. The cylinder 22 is provided with a first hole 221. In the circumferential direction of the cylinder 22, the first hole 221 is arranged on the opposite side of the spring hole 224. Second holes 222 and third holes 223 are respectively arranged on both end faces of the cylinder 22. In the circumferential direction of the cylinder 22, the second holes 222 are arranged on the opposite side of the exhaust valve seat 25. Among them, an intake passage 241 may be arranged on the crankshaft 24; an exhaust pipe 4 may be arranged on the housing 1; a lower muffler 5 may be arranged below the lower cylinder head 23, and the lower muffler 5 may be fixed on the lower end face of the lower cylinder head 23; the motor 3 includes a stator assembly 31 and a rotor 32, and the rotor 32 may be referred to as an annular magnet.
[0037] For the rolling rotor compressor provided in this embodiment, the imbalance caused by the spring hole 224 and the vane slot 225 is balanced through the first hole 221, and the imbalance caused by the exhaust valve seat 25 is balanced through the second holes 222 and the third holes 223. In this way, the rotating assembly composed of the rotor 32 and the pump body 2 (excluding the crankshaft 24) can achieve static balance and dynamic balance, and the vibration and noise during the operation of the compressor can be optimized without additionally increasing balance weights. The motor 3 is sleeved outside the pump body 2, and the motor 3 and the pump body 2 are no longer arranged vertically as in the prior art, which can significantly reduce the axial height of the rolling rotor compressor.
[0038] Preferably, as Figures 1 to 3 shown in the figure, the first hole 221 penetrates through both end faces of the cylinder 22 along the axial direction parallel to the crankshaft 24, or first holes 221 are respectively arranged at the same axial position on both end faces of the cylinder 22, and the two first holes 221 on both sides do not communicate with each other. The first hole 221 preferably penetrates through both end faces of the cylinder 22. The two end faces of the cylinder 22 refer to the upper end face 226 and the lower end face 227 of the cylinder 22. If the first hole 221 does not penetrate through both end faces of the cylinder 22, first holes 221 need to be respectively arranged at the same axial position on both end faces of the cylinder 22, so that the first hole 221 can balance the imbalance caused by the spring hole 224 and the vane slot 225 in terms of both weight and moment.
[0039] Preferably, as Figures 1 to 3As shown, an exhaust valve seat 25 is provided on the upper cylinder head 21 or the lower cylinder head 23; in the circumferential direction of the cylinder 22, the third hole 223 is provided on the same side of the exhaust valve seat 25; and in the axial direction of the cylinder 22, the second hole 222 is provided on the end face of the cylinder 22 close to the exhaust valve seat 25, and the third hole 223 is provided on the end face of the cylinder 22 facing away from the exhaust valve seat 25. The rolling rotor compressor provided in this embodiment is a single-exhaust compressor. If the exhaust valve seat 25 is provided on the upper cylinder head 21, the exhaust valve seat 25 is located above the first exhaust port 228; refer to Figure 5 As shown, if the exhaust valve seat 25 is provided on the lower cylinder head 23, the exhaust valve seat 25 is located below the second exhaust port 229. The second hole 222 and the third hole 223 can balance the unbalance caused by the exhaust valve seat 25 in terms of both weight and torque.
[0040] Preferably, as Figure 1 , Figure 4 and Figure 5 As shown, exhaust valve seats 25 are provided on both the upper cylinder head 21 and the lower cylinder head 23; in the circumferential direction of the cylinder 22, the third hole 223 is provided on the opposite side of the exhaust valve seat 25. The rolling rotor compressor provided in this embodiment is a double-exhaust compressor. The exhaust valve seat 25 on the upper cylinder head 21 is located above the first exhaust port 228, and the exhaust valve seat 25 on the lower cylinder head 23 is located below the second exhaust port 229. The second hole 222 and the third hole 223 can balance the unbalance caused by the two exhaust valve seats 25 in terms of both weight and torque.
[0041] Preferably, refer to Figure 2 As shown, the number of the first holes 221 is multiple. A plurality of first holes 221 are provided at intervals on the side wall of the cylinder 22, which can improve the strength of the side wall of the cylinder 22.
[0042] Preferably, refer to Figure 2 As shown, some of the first holes 221 among the multiple first holes 221 communicate with each other. The multiple first holes 221 may not communicate with each other, or partially communicate. When all the first holes 221 communicate with each other, it is equivalent to having only one first hole 221. Setting one first hole 221 can simplify the design and manufacturing of the first hole 221.
[0043] Preferably, refer to Figure 2 As shown, the number of both the second holes 222 and the third holes 223 is multiple. A plurality of second holes 222 and third holes 223 are provided at intervals on the side wall of the cylinder 22, which can improve the strength of the side wall of the cylinder 22.
[0044] Preferably, refer to Figure 2As shown, some of the plurality of second holes 222 communicate with each other, and / or some of the plurality of third holes 223 communicate with each other. The plurality of second holes 222 may not communicate with each other, or may partially communicate. When all the second holes 222 communicate with each other, it is equivalent to having only one second hole 222. Setting one second hole 222 can simplify the design and manufacturing of the second hole 222. Similarly, the plurality of third holes 223 may not communicate with each other, or may partially communicate. When all the third holes 223 communicate with each other, it is equivalent to having only one third hole 223. Setting one third hole 223 can simplify the design and manufacturing of the third hole 223.
[0045] Preferably, as Figure 1 shown, in a plane perpendicular to the crankshaft 24, the projection of the pump body 2 is entirely located inside the projection of the motor 3. In the solution provided in this embodiment, the rotor 32 included in the motor 3 is fixedly surrounded on the outer wall of the cylinder 22, and the stator assembly 31 included in the motor 3 is disposed around the rotor 32. The rotor 32 does not need to be fixed between the upper cylinder head 21 and the lower cylinder head 23. In this way, it can be ensured that the entire pump body 2 is located inside the rotor 32, and the components of the rotor 32 and the pump body 2 will not interfere with each other. Therefore, the sealing performance of both end faces of the cylinder 22 will not be affected during assembly. Thus, it is not necessary to assemble the rotor 32 while assembling the pump body 2, but the rotor 32 can be assembled after the pump body 2 is assembled, reducing the requirements for the processing technology and simplifying the assembly procedure.
[0046] Preferably, as Figure 1 shown, the motor 3 includes a stator assembly 31 and a rotor 32. The axial magnetic center 321 of the rotor 32 ( Figure 1 the position of the black dot indicated by 321) is lower than the axial magnetic center 311 of the stator assembly 31 ( Figure 1 the position of the black dot indicated by 311). When the axial magnetic center 321 of the rotor 32 is lower than the axial magnetic center 311 of the stator assembly 31, the distance from the upper end face of the rotor 32 to the upper end face of the stator assembly 31 is greater than the distance from the lower end face of the rotor 32 to the lower end face of the stator assembly 31. In this way, the rotor 32 can be subjected to an axially upward magnetic force FΦ from the stator assembly 31, thereby reducing the pressure exerted by the rotating assembly on the upper thrust surface 242 provided on the eccentric portion of the crankshaft 24 and the noise caused by friction, and reducing wear.
[0047] Preferably, as Figure 1As shown, a lower thrust surface 243 for fitting with the upper end surface of the lower cylinder head 23 is provided on the lower end surface of the eccentric portion of the crankshaft 24. The provision of the lower thrust surface 243 can improve the stability of the rotating assembly and prevent the upward movement of the rotating assembly. Since the rotating assembly can move up and down relative to the upper thrust surface 242 and the lower thrust surface 243 of the crankshaft 24, at the same moment, at most only one of the upper thrust surface 242 and the lower thrust surface 243 of the crankshaft 24 is under pressure.
[0048] In summary, for a rolling piston compressor provided by the present invention, the imbalance caused by the balance spring hole 224 and the vane groove 225 is balanced by the first hole 221, and the imbalance caused by the exhaust valve seat 25 is balanced by the second hole 222 and the third hole 223. In this way, the rotating assembly composed of the rotor 32 and the pump body 2 (excluding the crankshaft 24) can achieve static balance and dynamic balance, and the vibration and noise during the operation of the compressor can be optimized without adding additional balance weights. The motor 3 is sleeved outside the pump body 2, and the motor 3 and the pump body 2 are no longer arranged vertically as in the prior art, which can significantly reduce the axial height of the rolling piston compressor.
[0049] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art according to the above disclosure shall fall within the protection scope of the present invention.
Claims
1. A rolling rotor compressor, comprising a housing, a pump body and a motor. The housing has a cavity, the pump body and the motor are both arranged in the cavity, the motor is sleeved outside the pump body, the pump body includes an upper cylinder head, a cylinder, a lower cylinder head, a crankshaft and an exhaust valve seat. Two ends of the crankshaft are respectively fixedly connected to the housing. The cylinder is provided with a spring hole and a vane groove which are communicated with each other. It is characterized in that, The cylinder is provided with a first hole, and in the circumferential direction of the cylinder, the first hole is arranged on the opposite side of the spring hole; second holes and third holes are respectively arranged on both end faces of the cylinder, and in the circumferential direction of the cylinder, the second hole is arranged on the opposite side of the exhaust valve seat.
2. The rolling rotor type compressor according to claim 1, characterized in that, The first hole penetrates through both end faces of the cylinder along the axial direction parallel to the crankshaft, or The first holes are respectively arranged at the same axial position of both end faces of the cylinder, and the first holes on both sides are not communicated with each other.
3. The rolling rotor type compressor according to claim 1, characterized in that, An exhaust valve seat is arranged on the upper cylinder head or the lower cylinder head; In the circumferential direction of the cylinder, the third hole is arranged on the same side of the exhaust valve seat; And in the axial direction of the cylinder, the second hole is arranged on the end face of the cylinder close to the exhaust valve seat, and the third hole is arranged on the end face of the cylinder away from the exhaust valve seat.
4. A rolling rotor type compressor according to claim 1, characterized in that, Exhaust valve seats are arranged on both the upper cylinder head and the lower cylinder head; In the circumferential direction of the cylinder, the third hole is arranged on the opposite side of the exhaust valve seat.
5. A rolling rotor type compressor according to claim 1, characterized in that, The number of the first holes is multiple.
6. A rolling rotor type compressor according to claim 5, characterized in that, Some of the multiple first holes are communicated with each other.
7. A rolling rotor type compressor according to claim 1, characterized in that, The numbers of the second holes and the third holes are both multiple.
8. A rolling rotor type compressor according to claim 7, characterized in that, Some of the multiple second holes are communicated with each other, and / or Some of the multiple third holes are communicated with each other.
9. A rolling rotor type compressor according to claim 1, wherein, In a plane perpendicular to the crankshaft, the projection of the pump body is entirely located inside the projection of the motor.
10. A rolling rotor type compressor according to claim 1, characterized in that, The motor includes a stator assembly and a rotor, and the axial magnetic center of the rotor is lower than the axial magnetic center of the stator assembly.