Rolling rotor type compressor
By setting specific holes on the cylinder of the rolling rotor compressor to balance the imbalance, combined with a new layout of the motor and pump body, the vibration and noise problems of the rolling rotor single-cylinder compressor are solved, and the compressor is made lightweight and low-noise.
Patent Information
- Application Number
- CN202520558869.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-27
AI Technical Summary
Existing single-cylinder rolling rotor compressors require a balance block and have a relatively high axial height, making it difficult to meet the requirements of portable refrigeration equipment in terms of height, weight, vibration, and noise.
By setting the first hole on the cylinder to balance the imbalance caused by the spring hole and the vane groove, and combining the second and third holes to balance the imbalance of the exhaust valve seat, the rotating assembly composed of the rotor and the pump body can achieve static and dynamic balance, eliminating the need for additional balance blocks, and installing the motor outside the pump body to improve the relative position of the pump body and the motor.
It optimizes compressor vibration and noise without the need for additional counterweights, reduces the axial height of the rolling rotor compressor, and meets the lightweight and low-noise requirements of portable refrigeration equipment.
Smart Images
Figure CN223868175U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compressor technology, and in particular to a rolling rotor compressor. Background Technology
[0002] In portable refrigeration and other fields, such as air-conditioned clothing and mobile refrigerators, there are high requirements for the height, weight, performance, vibration and noise of the compressor. It is desirable for the compressor to be short, lightweight, high-performance and low-vibration and noise.
[0003] Existing single-cylinder rotary compressors include a motor, pump body, housing, and upper and lower housing covers. The motor includes a stator assembly and a rotor assembly (the rotor assembly mainly consists of a rotor core, magnets, and counterweights). The pump body mainly includes an upper cylinder head, cylinder and lower cylinder head, crankshaft, piston, and vanes. The pump body is located below the motor, and the motor's operation drives the pump body to compress the refrigerant. Due to the eccentricity of the crankshaft, the counterweights installed on the rotor typically include upper and lower counterweights. These counterweights enable the rotating assembly, composed of the rotor assembly and crankshaft, to achieve both static balance (static balance means that the center of gravity of the rotating assembly is located on the crankshaft axis when the rotating assembly is stationary) and dynamic balance (dynamic balance means that the rotating assembly achieves torque balance when it rotates).
[0004] The existing single-cylinder rolling rotor compressors mentioned above do not have an advantage in vibration compared to reciprocating piston compressors. A double-cylinder compressor must be developed to meet the vibration requirements. However, the double-cylinder structure will inevitably increase the height of the pump body, the overall height of the compressor, and the weight. Utility Model Content
[0005] This invention provides a rolling rotor compressor to solve the technical problems of existing rolling rotor compressors requiring a balance block and a high axial height.
[0006] To solve the above-mentioned technical problems, this utility model provides a rolling rotor compressor, which includes a housing, a pump body, and a motor. The housing has a cavity, and the pump body and the motor are both disposed within 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. Both ends of the crankshaft are fixedly connected to the housing. The cylinder is provided with interconnected spring holes and blade grooves. The cylinder is provided with a first hole, which is located on the opposite side of the spring hole in the circumferential direction of the cylinder. A second hole and a third hole are respectively provided on the two end faces of the cylinder, which are located on the opposite side of the exhaust valve seat in the circumferential direction of the cylinder.
[0007] Preferably, the first hole extends through both end faces of the cylinder in an axial direction parallel to the crankshaft, or
[0008] The first holes are respectively provided at the same axial position on both end faces of the cylinder, and the first holes on both sides are not connected to each other.
[0009] Preferably, an exhaust valve seat is provided on the upper cylinder head or the lower cylinder head;
[0010] In the circumferential direction of the cylinder, the third hole is located on the same side of the exhaust valve seat;
[0011] Furthermore, in the axial direction of the cylinder, the second hole is disposed on the end face of the cylinder near the exhaust valve seat, and the third hole is disposed on the end face of the cylinder away from the exhaust valve seat.
[0012] Preferably, both the upper cylinder head and the lower cylinder head are provided with exhaust valve seats;
[0013] In the circumferential direction of the cylinder, the third hole is located 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 are interconnected.
[0016] Preferably, there are multiple second holes and multiple third holes.
[0017] Preferably, some of the second holes are interconnected, and / or
[0018] Some of the third holes are interconnected.
[0019] Preferably, on 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, wherein the axial magnetic center of the rotor is lower than the axial magnetic center of the stator assembly.
[0021] This utility model provides a rolling rotor compressor that balances the imbalance caused by the spring hole and blade slot through a first hole, and balances the imbalance caused by the exhaust valve seat through a second and third hole. This allows the rotating assembly consisting of the rotor and pump body (excluding the crankshaft) to achieve both static and dynamic balance, optimizing compressor vibration and noise without the need for additional balancing weights. The motor is mounted outside the pump body, eliminating the vertical separation between the motor and pump body as in existing technologies, thus significantly reducing the axial height of the rolling rotor compressor. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of a rolling rotor compressor provided in one embodiment of the present invention.
[0023] Figure 2 This is a schematic diagram of the structure of a single-exhaust cylinder provided in one embodiment of the present invention.
[0024] Figure 3 yes Figure 2 AA sectional view.
[0025] Figure 4 This is a schematic diagram of the structure of a dual-exhaust cylinder provided in one embodiment of the present invention.
[0026] Figure 5 yes Figure 4 AA sectional view.
[0027] The attached figures are labeled as follows:
[0028] Casing-1, Pump body-2, Motor-3, Exhaust pipe-4, Lower silencer-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 groove-225, upper end face of cylinder-226, lower end face of cylinder-227, first exhaust port-228, second exhaust port-229;
[0031] Intake channel-241, upper thrust surface-242, lower thrust surface-243;
[0032] Stator assembly-31, rotor-32;
[0033] Axial magnetic center of stator assembly -311, axial magnetic center of rotor -321. Detailed Implementation
[0034] To make the objectives, advantages, and features of this utility model clearer, the following detailed description of a rolling rotor compressor proposed by this utility model is provided in conjunction with the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the explanation of the embodiments of this utility model.
[0035] In the description of this utility model, the terms "first," "second," and other qualifiers are added for convenience of description and reference, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with qualifiers such as "first" and "second" may explicitly or implicitly include one or more of that feature.
[0036] like Figures 1-3 As shown, this embodiment provides a rolling rotor compressor, including a housing 1, a pump body 2, and a motor 3. The housing 1 has a cavity, and the pump body 2 and the motor 3 are both disposed within 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 groove 225 that are interconnected. The cylinder 22 is provided with a first hole 221, which is located on the opposite side of the spring hole 224 in the circumferential direction of the cylinder 22. A second hole 222 and a third hole 223 are provided on the two end faces of the cylinder 22, respectively. In the circumferential direction of the cylinder 22, the second hole 222 is located on the opposite side of the exhaust valve seat 25. The crankshaft 24 can be provided with an intake passage 241; the housing 1 can be provided with an exhaust pipe 4; the lower cylinder head 23 can be provided with a lower muffler 5, which can 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, which can be referred to as a ring magnet.
[0037] This embodiment provides a rolling rotor compressor that balances the imbalance caused by the spring hole 224 and blade groove 225 through the first hole 221, and balances the imbalance caused by the exhaust valve seat 25 through the second hole 222 and the third hole 223. This allows the rotating assembly consisting of the rotor 32 and the pump body 2 (excluding the crankshaft 24) to achieve static and dynamic balance, optimizing vibration and noise during compressor operation without the need for additional balancing weights. The motor 3 is mounted outside the pump body 2, and unlike in the prior art, the motor 3 and pump body 2 are no longer arranged vertically, significantly reducing the axial height of the rolling rotor compressor.
[0038] Preferred, such as Figures 1-3As shown, the first hole 221 penetrates both end faces of the cylinder 22 along an axial direction parallel to the crankshaft 24, or the first hole 221 is respectively provided at the same axial position on both end faces of the cylinder 22, and the first holes 221 on both sides are not connected to each other. The first hole 221 preferably penetrates both end faces of the cylinder 22, which refers to the upper end face 226 and the lower end face 227 of the cylinder 22. If the first hole 221 does not penetrate both end faces of the cylinder 22, the first hole 221 needs to be provided at the same axial position on both end faces of the cylinder 22. This way, the first hole 221 can balance the imbalance caused by the spring hole 224 and the blade groove 225 in terms of both weight and torque.
[0039] Preferred, such as Figures 1-3 As 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, a third hole 223 is provided on the same side as the exhaust valve seat 25; and in the axial direction of the cylinder 22, a second hole 222 is provided on the end face of the cylinder 22 near the exhaust valve seat 25, and a third hole 223 is provided on the end face of the cylinder 22 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; see reference. Figure 5 As shown, if the exhaust valve seat 25 is located 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 imbalance caused by the exhaust valve seat 25 in terms of both weight and torque.
[0040] Preferred, such as Figure 1 , Figure 4 and Figure 5 As shown, both the upper cylinder head 21 and the lower cylinder head 23 are provided with exhaust valve seats 25; in the circumferential direction of the cylinder 22, a third hole 223 is located on the opposite side of the exhaust valve seat 25. The rolling rotor compressor provided in this embodiment is a dual-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 imbalance caused by the two exhaust valve seats 25 in terms of both weight and torque.
[0041] Preferred, Reference Figure 2 As shown, there are multiple first holes 221. The multiple spaced first holes 221 on the side wall of the cylinder 22 can improve the strength of the side wall of the cylinder 22.
[0042] Preferred, Reference Figure 2As shown, some of the multiple first holes 221 are interconnected. The multiple first holes 221 may not be interconnected, or may be partially interconnected. When all the first holes 221 are interconnected, it is equivalent to having only one first hole 221. Setting up a single first hole 221 can simplify the design and manufacturing of the first hole 221.
[0043] Preferred, Reference Figure 2 As shown, there are multiple second holes 222 and multiple third holes 223. The multiple spaced second holes 222 and multiple spaced third holes 223 on the side wall of the cylinder 22 can improve the strength of the side wall of the cylinder 22.
[0044] Preferred, Reference Figure 2 As shown, some of the multiple second holes 222 are interconnected, and / or some of the multiple third holes 223 are interconnected. The multiple second holes 222 may not be interconnected, or may be partially interconnected. When all the second holes 222 are interconnected, it is equivalent to having only one second hole 222. Setting up a single second hole 222 simplifies its design and manufacturing. Similarly, the multiple third holes 223 may not be interconnected, or may be partially interconnected. When all the third holes 223 are interconnected, it is equivalent to having only one third hole 223. Setting up a single third hole 223 simplifies its design and manufacturing.
[0045] Preferred, such as Figure 1 As shown, on 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 of the motor 3 is fixed around the outer wall of the cylinder 22, and the stator assembly 31 of the motor 3 is arranged around the outside of the rotor 32. The rotor 32 does not need to be fixed between the upper cylinder head 21 and the lower cylinder head 23. This ensures that the entire pump body 2 is located inside the rotor 32, and the rotor 32 and the components of the pump body 2 will not interfere with each other. Therefore, the sealing performance of both ends of the cylinder 22 will not be affected during assembly. Thus, it is not necessary to assemble the rotor 32 at the same time as assembling the pump body 2, but rather to assemble it with the rotor 32 after the pump body 2 is assembled. This reduces the requirements for the processing technology and simplifies the assembly procedure.
[0046] Preferred, such as Figure 1 As shown, the motor 3 includes a stator assembly 31 and a rotor 32, with 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 location indicated by the black dot in 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. This allows the rotor 32 to be subjected to an axially upward magnetic force FΦ from the stator assembly 31, thereby reducing the pressure applied by the rotating assembly to the upper thrust surface 242 provided on the eccentric part of the crankshaft 24 and the noise caused by friction, and reducing wear.
[0047] Preferred, such as Figure 1 As shown, the lower end face of the eccentric portion of the crankshaft 24 is provided with a lower thrust surface 243 for engaging with the upper end face of the lower cylinder head 23. The lower thrust surface 243 improves the stability of the rotating assembly and prevents it from moving upwards. Since the rotating assembly can move up and down relative to the upper thrust surface 242 and lower thrust surface 243 of the crankshaft 24, at any given time, only one thrust surface of the crankshaft 24 can be under pressure.
[0048] In summary, the rolling rotor compressor provided by this utility model balances the imbalance caused by the spring hole 224 and the blade groove 225 through the first hole 221, and balances the imbalance caused by the exhaust valve seat 25 through the second hole 222 and the third hole 223. This allows the rotating assembly consisting of the rotor 32 and the pump body 2 (excluding the crankshaft 24) to achieve both static and dynamic balance, optimizing the vibration and noise during compressor operation without the need for additional balancing weights. The motor 3 is mounted outside the pump body 2, and unlike in the prior art, the motor 3 and pump body 2 are no longer arranged vertically, thus significantly reducing the axial height of the rolling rotor compressor.
[0049] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the present utility model.
Claims
1. A rolling rotor compressor, comprising a housing, a pump body, and a motor, wherein the housing has a cavity, the pump body and the motor are both disposed within 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, both ends of the crankshaft are fixedly connected to the housing, and the cylinder is provided with interconnected spring holes and vane slots, characterized in that, The cylinder is provided with a first hole, which is located on the opposite side of the spring hole in the circumferential direction of the cylinder; a second hole and a third hole are respectively provided on the two end faces of the cylinder, which are located on the opposite side of the exhaust valve seat in the circumferential direction of the cylinder.
2. A rolling rotor compressor as described in claim 1, characterized in that, The first hole penetrates both end faces of the cylinder along an axial direction parallel to the crankshaft, or The first holes are respectively provided at the same axial position on both end faces of the cylinder, and the first holes on both sides are not connected to each other.
3. A rolling rotor compressor as described in claim 1, characterized in that, An exhaust valve seat is provided on the upper cylinder head or the lower cylinder head; In the circumferential direction of the cylinder, the third hole is located on the same side of the exhaust valve seat; Furthermore, in the axial direction of the cylinder, the second hole is disposed on the end face of the cylinder near the exhaust valve seat, and the third hole is disposed on the end face of the cylinder away from the exhaust valve seat.
4. A rolling rotor compressor as described in claim 1, characterized in that, Both the upper cylinder head and the lower cylinder head are provided with exhaust valve seats; In the circumferential direction of the cylinder, the third hole is located on the opposite side of the exhaust valve seat.
5. A rolling rotor compressor as described in claim 1, characterized in that, There are multiple first holes.
6. A rolling rotor compressor as described in claim 5, characterized in that, Some of the first holes are interconnected.
7. A rolling rotor compressor as described in claim 1, characterized in that, There are multiple second holes and multiple third holes.
8. A rolling rotor compressor as described in claim 7, characterized in that, Some of the second holes are interconnected, and / or Some of the third holes are interconnected.
9. A rolling rotor compressor as described in claim 1, characterized in that, On 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 compressor as described in claim 1, characterized in that, The motor includes a stator assembly and a rotor, wherein the axial magnetic center of the rotor is lower than the axial magnetic center of the stator assembly.