Rotary compressor
By introducing an elastic element to connect the rotating parts in the rotary compressor, the motor torque is dynamically adjusted to match the gas resistance torque, thus solving the low-frequency vibration problem of the single-cylinder compressor and achieving energy matching and adaptive capability improvement without electronic control compensation.
Patent Information
- Application Number
- CN202423261464.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-27
AI Technical Summary
When a single-cylinder compressor operates at low frequency, the mismatch between the motor torque and the gas resistance torque leads to vibration problems. Existing electronic torque compensation methods increase power consumption and have limited effectiveness.
Design a rotary compressor including a motor, a crankshaft, a first rotating component, a second rotating component, and an elastic component. The first and second rotating components are connected by the elastic component. The deformation of the elastic component absorbs and releases energy, and the motor torque is dynamically adjusted to match the gas resistance torque.
It can achieve matching between motor torque and gas resistance torque without electronic control intervention, reducing compressor vibration, improving adaptability, and reducing power consumption.
Smart Images
Figure CN223523963U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of compressors, in particular to a rotary compressor. BACKGROUND
[0002] Compared with a double-cylinder compressor, a single-cylinder compressor exhibits greater fluctuation in gas resistance torque, especially in the scenario of low-frequency operation, because it is difficult to achieve an ideal matching state between the torque provided by the motor and the gas resistance torque, which often leads to a more obvious vibration problem of the compressor in the low-frequency band, and with the continuous increase of the displacement of the compressor, this problem becomes more and more significant.
[0003] At present, in order to solve the above-mentioned problem, when the single-cylinder compressor is operated at low frequency, an electric control means is usually used for intervention to implement a torque compensation strategy, however, this compensation measure can alleviate the problem to a certain extent, but it needs to input additional current, thereby inevitably increasing the power consumption of the compressor, and more importantly, for a larger displacement model, the effect of this compensation method is relatively limited. CONTENT OF THE UTILITY MODEL
[0004] The purpose of the present application includes, for example, providing a rotary compressor which can solve the vibration problem caused by the mismatch between the motor torque and the gas resistance torque.
[0005] Embodiments of the present application can be implemented as follows:
[0006] The embodiments of the present application provide a rotary compressor, which comprises a motor, a crankshaft, a first rotating part, a second rotating part and an elastic part, the motor comprises a stator and a rotor matched with the stator, the first rotating part is fixedly connected with the rotor, the second rotating part is fixedly connected with the crankshaft, the first rotating part and the second rotating part are in rotary cooperation, and the elastic part is connected between the first rotating part and the second rotating part.
[0007] Optionally, a first through hole is formed in the first rotating part, the second rotating part is arranged in the first through hole, and the elastic part is connected between the second rotating part and the inner wall of the first through hole.
[0008] Optionally, the first through hole comprises a center hole and a side hole arranged on one side of the center hole, the second rotating part comprises a rotating body and an extension arranged on one side of the rotating body, the rotating body is arranged in the center hole, the extension extends into the side hole, and the elastic part is connected between the extension and the inner wall of the side hole.
[0009] Optionally, the central hole is a circular hole, and the rotating body is a cylinder, and an outer diameter of the rotating body matches a hole diameter of the central hole.
[0010] Optionally, in a cross section parallel to an end surface of the rotating body, a cross-sectional shape of the central hole is a circle, a cross-sectional shape of the side hole is a sector, and a center of the cross section of the central hole and a center of the cross section of the side hole coincide.
[0011] Optionally, the number of the side holes is multiple, and the multiple side holes are arranged along a circumferential direction of the central hole.
[0012] The number of the extensions and the number of the elastic members match the number of the side holes, the multiple extensions correspond to the multiple side holes one by one, and each elastic member is connected between a corresponding extension and an inner wall of the side hole.
[0013] Optionally, the extension is a cuboid, and the elastic member is connected to a middle part of the extension.
[0014] Optionally, one of the first rotating member and the rotor is provided with a flange, and the other of the first rotating member and the rotor extends into an inner side of the flange and is in interference fit with the flange.
[0015] Optionally, the second rotating member is provided with a second through hole, the crankshaft is arranged in the second through hole and is in interference fit with the second through hole.
[0016] Optionally, the elastic member is a spiral spring or a torsion spring.
[0017] The rotating compressor provided by the embodiment has the following beneficial effects, for example: in order to solve the vibration problem caused by the mismatch between the motor torque and the gas resistance torque, a rotating compressor is designed, which comprises a motor, a crankshaft, a first rotating member, a second rotating member and an elastic member. The motor comprises a stator and a rotor matched with the stator. The first rotating member is fixedly connected with the rotor. The second rotating member is fixedly connected with the crankshaft. The first rotating member is in rotational fit with the second rotating member. The elastic member is connected between the first rotating member and the second rotating member. In the process of motor operation, the rotor drives the first rotating member to rotate. In this process, the elastic member deforms to generate elastic force. The second rotating member rotates with the first rotating member under the action of the elastic force. The second rotating member drives the crankshaft to rotate. When the gas resistance torque in the compressor is larger than the motor torque, the elastic member deforms to absorb the excess energy. When the gas resistance torque in the compressor is smaller, the elastic member gradually returns to the state before deformation to release the energy stored in the deformation process, thereby better solving the vibration problem caused by the mismatch between the motor torque and the gas resistance torque. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0019] Figure 1 The figure is a schematic diagram of the cooperation of the first rotating member and the second rotating member in the first view angle in the embodiments of the present application.
[0020] Figure 2 The figure is a schematic diagram of the cooperation of the first rotating member and the second rotating member in the second view angle in the embodiments of the present application.
[0021] Figure 3 The figure is a schematic diagram of the first rotating member in the first view angle in the embodiments of the present application.
[0022] Figure 4 The figure is a schematic diagram of the first rotating member in the second view angle in the embodiments of the present application.
[0023] Figure 5 The figure is a schematic diagram of the second rotating member in the first view angle in the embodiments of the present application.
[0024] Figure 6 The figure is a schematic diagram of the second rotating member in the second view angle in the embodiments of the present application.
[0025] Figure: 100-first rotating member; 110-first through hole; 111-center hole; 112-side hole; 200-second rotating member; 210-rotating body; 220-extension; 230-second through hole; 240-elastic member. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0027] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0029] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0030] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0031] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.
[0032] As disclosed in the background section, compared to twin-cylinder compressors, the mismatch between the motor torque and the gas resistance torque in a single-cylinder compressor causes more noticeable vibrations in the low-frequency range. Currently, to address this issue, electronic control intervention is typically used to implement torque compensation strategies during low-frequency operation of a single-cylinder compressor. However, while this compensation measure can alleviate the problem to some extent, it requires additional input current, inevitably increasing the compressor's power consumption. More importantly, for models with larger displacements, the effectiveness of this compensation method is relatively limited. Embodiments of this application provide a rotary compressor, at least to solve the aforementioned technical problems.
[0033] Please refer to Figure 1 , Figure 2 The rotary compressor provided in the embodiments of this application includes a motor (not shown), a crankshaft (not shown), a first rotating member 100, a second rotating member 200, and an elastic member 240. The motor includes a stator and a rotor that cooperates with the stator. The first rotating member 100 is fixedly connected to the rotor, and the second rotating member 200 is fixedly connected to the crankshaft. The first rotating member 100 and the second rotating member 200 are rotatably engaged. The elastic member 240 is connected between the first rotating member 100 and the second rotating member 200.
[0034] The rotary compressor also includes a compressor housing (not shown in the figure), and the motor, crankshaft, first rotating component 100, second rotating component 200 and elastic component 240 are all disposed inside the compressor housing. The stator of the motor is fixed to the compressor housing. The rotation axes of the rotor, first rotating component 100 and second rotating component 200 coincide.
[0035] During the operation of the motor, the rotor drives the first rotating member 100 to rotate, the first rotating member 100 applies force to the second rotating member 200 through the deformation of the elastic member 240, and then the second rotating member 200 is driven to rotate and drive the crankshaft to rotate.
[0036] When the gas resistance torque in the compressor is large, if the motor torque is relatively small relative to the gas resistance torque, the elastic member 240 deforms to absorb excess energy, and when the gas resistance torque decreases, the elastic member 240 gradually recovers to the state before deformation to release the energy stored in the deformation process. Through the energy storage characteristics of the elastic member 240, the motor torque is dynamically adjusted to match the motor torque and the gas resistance torque, thereby reducing the vibration of the compressor, and thus the vibration problem caused by the mismatch between the motor torque and the gas resistance torque is better solved.
[0037] Please refer to Figures 3-6 In the embodiment, a first through hole 110 is formed in the first rotating member 100, the second rotating member 200 is arranged in the first through hole 110, and the elastic member 240 is connected between the second rotating member 200 and the inner wall of the first through hole 110.
[0038] The first through hole 110 is formed along the rotation axis of the first rotating member 100, and the center axis of the first through hole 110 coincides with the rotation axis of the first rotating member 100; the second rotating member 200 can rotate relative to the first rotating member 100 within the first through hole 110 about the center axis of the first through hole 110. During the relative rotation of the first rotating member 100 and the second rotating member 200, the elastic member 240 can absorb excess energy and release stored energy, without the need for electric control means to compensate for the motor torque, thereby improving the adaptive ability of the compressor.
[0039] In the embodiment, the first through hole 110 includes a center hole 111 and a side hole 112 connected to one side of the center hole 111, the second rotating member 200 includes a rotating body 210 and an extension 220 arranged on one side of the rotating body 210, the rotating body 210 is arranged in the center hole 111, the extension 220 extends into the side hole 112, and the elastic member 240 is connected between the extension 220 and the inner wall of the side hole 112.
[0040] The center hole 111 and the side hole 112 are both formed along the rotation axis of the first rotating member 100, the center axis of the center hole 111 coincides with the rotation axis of the first rotating member 100, the side hole 112 is connected to the center hole 111 and located on one side of the center hole 111; the rotating body 210 and the extension 220 can be integrally formed, and the rotating body 210 can rotate within the center hole 111.
[0041] Further, the central hole 111 is a circular hole, and the rotating body 210 is a cylinder, and the outer diameter of the rotating body 210 matches the hole diameter of the central hole 111.
[0042] When the outer diameter of the rotating body 210 matches the hole diameter of the central hole 111, the rotation axis of the rotating body 210 coincides with the central axis of the central hole 111, so that the rotating body 210 is more stable during rotation.
[0043] Further, in the cross section parallel to the end surface of the rotating body 210, the cross-sectional shape of the central hole 111 is circular, the cross-sectional shape of the side hole 112 is fan-shaped, and the center of the cross section of the central hole 111 and the center of the cross section of the side hole 112 coincide.
[0044] The side hole 112 includes an arc surface coinciding with the central axis of the central hole 111 and a side surface connected to both sides of the arc surface, and the elastic member 240 is connected between the extension 220 and one of the side surfaces of the side hole 112.
[0045] In this embodiment, the number of side holes 112 is multiple, and the multiple side holes 112 are arranged along the circumference of the central hole 111; the number of extensions 220 and elastic members 240 matches the number of side holes 112, and the multiple extensions 220 correspondingly extend into the multiple side holes 112; and each elastic member 240 is connected between the corresponding extension 220 and the inner wall of the side hole 112.
[0046] For example, the number of side holes 112, extensions 220 and elastic members 240 is four, the included angle between two adjacent extensions 220 is 90°, the four extensions 220 correspondingly extend into the four side holes 112, and each side hole 112 is provided with one elastic member 240, and the elastic member 240 is connected between one of the side surfaces of the side hole 112 and the surface of the extension 220 opposite to the side surface.
[0047] It can be understood that the number of side holes 112, extensions 220 and elastic members 240 can be determined according to actual working conditions, for example, the number of side holes 112, extensions 220 and elastic members 240 can also be less than three or more than five, which is not limited.
[0048] In this embodiment, the extension 220 is a cuboid, and the elastic member 240 is connected to the middle part of the extension 220.
[0049] As described above, the elastic member 240 is connected between one of the side surfaces of the side hole 112 and the surface of the extension 220 opposite to the side surface, the length direction of the extension 220 coincides with the central axis direction of the central hole 111, and the width direction of the extension 220 coincides with the radial direction of the central hole 111.
[0050] In the case where one elastic member 240 is arranged corresponding to one extension 220, the elastic member 240 is connected to the middle part of the surface opposite to the side surface, so that the elastic member 240 can absorb and release energy at the optimal position; of course, it can be understood that in the case where a plurality of elastic members 240 are arranged corresponding to one extension 220, the plurality of elastic members 240 can be connected to the extension 220 uniformly along the length direction of the extension 220.
[0051] In other embodiments, the extension 220 can also be in the shape of a fold line or an arc, which is not limited.
[0052] In the embodiment, one of the first rotating member 100 and the rotor is provided with a flange, and the other of the first rotating member 100 and the rotor extends into the inside of the flange and is in interference fit with the flange.
[0053] The flange can be provided on the end surface of one of the first rotating member 100 and the rotor, and in the case where the other of the first rotating member 100 and the rotor extends into the inside of the flange and is in interference fit with the flange, the first rotating member 100 is fixedly connected with the rotor, and at this time the rotor can drive the first rotating member 100 to rotate.
[0054] For example, the flange is provided on the end surface of the first rotating member 100 facing the rotor, and the rotor extends into the inside of the flange and is in interference fit with the flange, and at this time the rotation of the rotor can drive the first rotating member 100 to rotate.
[0055] In other embodiments, the fixed connection manner of the first rotating member 100 and the rotor is not limited to the above interference fit manner, for example, the fixed connection manner of the first rotating member 100 and the rotor can also be adhesive fit or clamping fit, as long as the first rotating member 100 and the rotor can be relatively fixed.
[0056] In the embodiment, the second rotating member 200 is provided with a second through hole 230, and the crankshaft is arranged in the second through hole 230 and is in interference fit with the second through hole 230.
[0057] The second through hole 230 is arranged on the rotating body 210, and in the case where the crankshaft is arranged in the second through hole 230 and is in interference fit with the second through hole 230, the second rotating member 200 is fixedly connected with the crankshaft, and at this time the second rotating member 200 can drive the crankshaft to rotate.
[0058] The second rotating member 200 and the crankshaft can be in interference fit through the processes of cold pressing or hot setting, and in other embodiments, the fixed connection manner of the second rotating member 200 and the crankshaft is not limited to the above interference fit manner, for example, the fixed connection manner of the second rotating member 200 and the crankshaft can also be adhesive fit or clamping fit, as long as the second rotating member 200 and the crankshaft can be relatively fixed.
[0059] In this embodiment, the elastic member 240 is a coil spring or a torsion spring, at least one end of the elastic member 240 is fixed to the first rotating member 100 or the second rotating member 200, for example, one end of the elastic member 240 is fixed to one side of the extension 220, and the other end is in abutment with one side of the side hole 112; of course, in some other embodiments, the two ends of the elastic member 240 can be fixedly connected with one side of the extension 220 and one side of the side hole 112 respectively.
[0060] In the process of operation of the motor, with the change of the gas force in the compressor housing, when the gas resistance torque is large, if the motor torque is relatively small compared with the gas resistance torque, the coil spring or the torsion spring will be moderately compressed to absorb the excess energy; and when the gas resistance torque decreases, the coil spring or the torsion spring will gradually expand to release the energy stored in the compression process, which significantly reduces the difficulty of motor torque compensation and improves the self-adaptive ability of the compressor.
[0061] In some other embodiments, the elastic member 240 can also be other elastic members 240 except coil springs and torsion springs, as long as it can absorb and release energy.
[0062] The working principle of the rotary compressor provided by the embodiment of the application is as follows: in the process of operation of the motor, the rotor drives the first rotating member 100 to rotate, the first rotating member 100 applies force to the second rotating member 200 through the deformation of the coil spring or the torsion spring, and then the second rotating member 200 rotates and drives the crankshaft to rotate. When the gas resistance torque in the compressor is large, if the motor torque is relatively small compared with the gas resistance torque, the coil spring or the torsion spring deforms to absorb the excess energy, and when the gas resistance torque decreases, the coil spring or the torsion spring gradually recovers to the state before deformation to release the energy stored in the deformation process, and the energy storage characteristics of the coil spring or the torsion spring dynamically adjust the motor torque.
[0063] The rotary compressor in the embodiment of the application is a single-cylinder compressor, which is more economical in cost and can dynamically adjust the motor torque, and can be applied to three-match air conditioners or other large refrigeration equipment with more severe gas resistance torque fluctuation.
[0064] In summary, the embodiment of the application provides a rotary compressor, by arranging the first rotating member 100 fixedly connected with the rotor, the second rotating member 200 fixedly connected with the crankshaft, and the elastic member 240 connected between the first rotating member 100 and the second rotating member 200 in the compressor housing, and by the energy storage characteristics of the elastic member 240, the motor torque is dynamically adjusted to match the change of the gas resistance torque, thereby reducing the vibration of the compressor.
[0065] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A rotary compressor characterized by comprising: The motor comprises a stator and a rotor matched with the stator, the first rotating part (100) is fixedly connected with the rotor, the second rotating part (200) is fixedly connected with the crankshaft, the first rotating part (100) is rotationally matched with the second rotating part (200), and the elastic part (240) is connected between the first rotating part (100) and the second rotating part (200).
2. The rotary compressor of claim 1, wherein A first through hole (110) is formed in the first rotating part (100), the second rotating part (200) is arranged in the first through hole (110), and the elastic part (240) is connected between the second rotating part (200) and the inner wall of the first through hole (110).
3. The rotary compressor of claim 2, wherein, The first through hole (110) comprises a center hole (111) and a side hole (112) arranged on one side of the center hole (111), the second rotating part (200) comprises a rotating body (210) and an extension (220) arranged on one side of the rotating body (210), the rotating body (210) is arranged in the center hole (111), the extension (220) extends into the side hole (112), and the elastic part (240) is connected between the extension (220) and the inner wall of the side hole (112).
4. The rotary compressor of claim 3, wherein The center hole (111) is a circular hole, and the rotating body (210) is in a cylindrical shape, wherein the outer diameter of the rotating body (210) matches the hole diameter of the center hole (111).
5. The rotary compressor of claim 4, wherein, In a cross section parallel to the end surface of the rotating body (210), the cross-sectional shape of the center hole (111) is circular, the cross-sectional shape of the side hole (112) is sector-shaped, and the center of the cross section of the center hole (111) and the center of the cross section of the side hole (112) coincide.
6. The rotary compressor of claim 3, wherein The number of the side holes (112) is multiple, and the multiple side holes (112) are arranged along the circumference of the center hole (111). The number of the extensions (220) and the number of the elastic parts (240) match the number of the side holes (112), the multiple extensions (220) extend into the multiple side holes (112) one by one in a one-to-one correspondence, and each elastic part (240) is connected between the corresponding extension (220) and the inner wall of the side hole (112).
7. The rotary compressor of claim 3, wherein The extension (220) is in a cuboid shape, and the elastic part (240) is connected to the middle part of the extension (220).
8. The rotary compressor of claim 1, wherein One of the first rotating part (100) and the rotor is provided with a flange, and the other of the first rotating part (100) and the rotor extends into the inside of the flange and is in interference fit with the flange.
9. The rotary compressor of claim 1, wherein A second through hole (230) is formed in the second rotating part (200), the crankshaft is arranged in the second through hole (230) and is in interference fit with the second through hole (230).
10. The rotary compressor according to any one of claims 1 to 9, characterized in that, The elastic part (240) is a spiral spring or a torsion spring.