Rubber pad and variable-frequency refrigeration compressor

Abstract

The utility model provides a rubber pad and a variable-frequency refrigeration compressor. The rubber pad is used for the variable-frequency refrigeration compressor. The rubber pad comprises a pad body. The pad body comprises an abutting part and a stabilizing part, and the abutting part is arranged at one end of the stabilizing part. The stabilizing part is cylindrical and comprises an arc surface, the arc surface is arranged on the face, away from the axis, of the stabilizing part, and the arc surface is concavely arranged in the direction close to the axis of the stabilizing part. According to the rubber pad provided by the utility model, the overall deformation quantity of the stabilizing part is smaller, namely the overall deformation quantity of the rubber pad is smaller; after the rubber pad deforms, the length of the whole rubber pad in the axis direction cannot be shortened. Therefore, the rubber pad provided by the utility model is wide in application range, and can be applied to a fixed-frequency compressor and a variable-frequency refrigeration compressor.

Description

Technical Field

[0001] The utility model relates to the field of compressors, in particular to a rubber pad and a variable frequency refrigeration compressor. Background Art

[0002] The rubber pad connects the compressor and the refrigerator body, and is mainly used to absorb and reduce the vibration and noise of the compressor. With the continuous improvement of the quality of life in the current society, users' requirements for the vibration and noise of refrigerators are also constantly increasing.

[0003] Refrigerators include fixed-frequency refrigerators and variable-frequency refrigerators. Among them, the compressor of the variable-frequency refrigerator has an unfixed speed. When the temperature is high, it rotates faster to achieve the purpose of cooling as quickly as possible. When the temperature is low, it runs at the lowest speed to maintain the temperature. The operating frequency range of the compressor used in the variable-frequency refrigerator usually varies between 1500 and 4500 rpm. The speed is automatically adjusted according to the refrigeration needs of the refrigerator, thereby achieving energy efficiency optimization and temperature control accuracy. The compressor of the fixed-frequency refrigerator has a fixed speed, generally between 2950-3000 rpm. When the temperature inside the refrigerator reaches the set temperature, the compressor will stop running. When the temperature rises, the compressor will restart again, and the temperature control is achieved by stopping and starting the compressor.

[0004] In the related art, although there are many specifications of rubber pads used in compressors, they are usually only suitable for fixed-frequency compressors, and their vibration reduction range is narrow, and they cannot be used for variable-frequency refrigeration compressors. In particular, when the speed of the variable-frequency refrigeration compressor exceeds the vibration reduction range of the rubber pad, the vibration reduction effect is very poor. Utility Model Content

[0005] In order to overcome the defects existing in the related art, the utility model provides a rubber pad and a variable frequency refrigeration compressor.

[0006] The embodiment of the utility model is achieved as follows:

[0007] A rubber pad is used for a variable frequency refrigeration compressor. The rubber pad includes a pad body. The pad body includes an abutment portion and a stabilization portion, and the abutment portion is arranged at one end of the stabilization portion. The stabilization portion is arranged in a cylindrical shape, and the stabilization portion includes an arc surface, which is arranged on a side of the stabilization portion away from an axis, and the arc surface is arranged concavely in a direction close to the axis of the stabilization portion.

[0008] In some embodiments, a horizontal plane where the midpoint of the axis of the stabilizing portion is located is set as a symmetry plane, and the stabilizing portion is symmetrically arranged along the symmetry plane.

[0009] In some embodiments, a through groove is formed on the pad body, and the through groove passes through the abutment portion and the stabilization portion in sequence, and an axis of the through groove coincides with an axis of the stabilization portion.

[0010] In some embodiments, the stabilizing portion further includes a blind hole, which is vertically opened on the stabilizing portion and is disposed between the arc surface and the through groove.

[0011] In some embodiments, one end of the blind hole extends to the outside of the pad body, and the connecting portion is arranged on a side of the stabilizing portion away from the abutting portion.

[0012] In some embodiments, a plurality of the blind holes are evenly distributed circumferentially on the stabilizing portion.

[0013] In some embodiments, the diameter of the stabilizing portion is set to φ1, satisfying: 10mm≤φ1≤50mm. The diameter of the blind hole is set to φ2, satisfying: 3mm≤φ2≤5mm. The diameter of the stabilizing portion is positively correlated with the diameter of the blind hole.

[0014] In some embodiments, the number of the blind holes is set to A, satisfying: 3≤A≤6.

[0015] In some embodiments, the abutting portion includes an end head and a connecting member, the stabilizing portion is disposed at one end of the connecting member, and the end head is disposed at an end of the connecting member away from the stabilizing portion.

[0016] The utility model also provides a variable frequency refrigeration compressor, wherein the variable frequency refrigeration compressor is equipped with the rubber pad described in any one of the above embodiments.

[0017] The beneficial effects of the embodiments of the utility model are:

[0018] The rubber pad provided by the utility model can be directly installed at a suitable position where vibration reduction or buffering is required when in use. The stabilizing portion of the rubber pad is provided with an arc that is recessed in the direction close to the axis of the stabilizing portion, so that during the operation of the rubber pad, as the rotation speed of the rubber pad increases, the degree to which the arc is recessed in the direction close to the axis of the stabilizing portion gradually decreases. On the one hand, after the arc is provided on the stabilizing portion, the overall deformation of the stabilizing portion is smaller, that is, the overall deformation of the rubber pad is smaller; on the other hand, after the rubber pad is deformed, the overall length in the axial direction will not be shortened. It is ensured that the overall vibration reduction and buffering capacity of the rubber pad will not be affected, so that the rubber pad of the utility model has a wide range of applications and can be applied to fixed-frequency compressors and variable-frequency refrigeration compressors. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a first state of a rubber pad of the first embodiment of the utility model from a viewing angle;

[0021] Figure 2 It is a structural schematic diagram of the second state of the rubber pad of the first embodiment of the utility model from one viewing angle;

[0022] Figure 3 It is a structural schematic diagram of a rubber pad in a first state from a perspective of a second embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of a second state of a rubber pad of a second embodiment of the utility model from one viewing angle;

[0024] Figure 5 It is a structural schematic diagram of a rubber pad in a first state from a perspective of a third embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of a rubber pad in a second state from one viewing angle of the third embodiment of the utility model;

[0026] Figure 7 It is a structural schematic diagram of a first state of a rubber pad of a fourth embodiment of the utility model from a viewing angle;

[0027] Figure 8 It is a structural schematic diagram of a rubber pad in a second state from one viewing angle of a fourth embodiment of the utility model;

[0028] Fig. 9 It is a structural schematic diagram of a rubber pad in a first state from a perspective of a fifth embodiment of the utility model;

[0029] Fig.10 It is a structural schematic diagram of a rubber pad in a second state from a perspective of the fifth embodiment of the utility model.

[0030] icon:

[0031] 100 - pad body; 110 - abutment portion; 111 - end; 112 - connector; 120 - stabilizing portion; 121 - arc surface; 122 - symmetric surface; 130 - through groove; 200 - blind hole; 300 - deformation hole. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The present application provides a rubber pad, which is used to solve the problem in the related art that the rubber pad has a small application range and is not suitable for variable frequency refrigeration compressors.

[0039] See also Figure 1 , Figure 2 A rubber pad is used for a variable frequency refrigeration compressor. The rubber pad includes a pad body 100. The pad body 100 includes an abutment portion 110 and a stabilization portion 120, and the abutment portion 110 is arranged at one end of the stabilization portion 120. The stabilization portion 120 is arranged in a cylindrical shape, and the stabilization portion 120 includes an arc surface 121, and the arc surface 121 is arranged on a side of the stabilization portion 120 away from the axis, and the arc surface 121 is concavely arranged in a direction close to the axis of the stabilization portion 120.

[0040] Specifically, the rubber pad of this embodiment can be directly inserted into the position where vibration reduction and buffering are required, such as the transmission rod, etc. The stabilizing portion 120 of the rubber pad is provided with an arc surface 121, and the arc surface 121 is recessed in the direction close to the axis of the stabilizing portion 120. In this way, when the rubber pad rotates, the centrifugal force will cause the stabilizing portion 120 to move away from the axis, and the direction of the centrifugal force is opposite to the recessed direction of the arc surface 121. In other words, the arc surface 121 can effectively reduce the deformation of the stabilizing portion 120 during the rotation process.

[0041] During the rotation of the rubber pad, the deformation of the arc surface 121 is small, that is, the deformation of the rubber pad as a whole is small, which ensures that the rubber pad can maintain good vibration reduction ability during the rotation. In addition, when the stabilizing portion 120 is deformed, the arc surface 121 tends to deform in a direction away from the axis of the stabilizing portion 120, that is, the curvature of the arc surface 121 will gradually slow down, and the length of the stabilizing portion 120 in the axial direction will gradually increase, further ensuring that the rubber pad can still have good vibration reduction ability during the rotation.

[0042] In some embodiments, for example, Figure 1 , Figure 2 As shown, the horizontal plane where the midpoint of the axis of the stabilizing portion 120 is located is set as the symmetry plane 122, and the stabilizing portion 120 is symmetrically arranged along the symmetry plane 122. The stabilizing portion 120 is symmetrically arranged, that is, the arc surface 121 is also symmetrically arranged, so that when the arc surface 121 is deformed due to centrifugal force, it can be deformed evenly, thereby improving the overall stability. By symmetrically arranging the stabilizing portion 120 along the symmetry plane 122, it can be ensured that during the operation of the compressor, the force exerted on the stabilizing portion 120 of the rubber pad is evenly distributed in all directions, reducing the displacement or vibration caused by asymmetric force, and reducing the possibility of excessive local force, thereby improving the rationality of the structure of this embodiment. Reduce the displacement or vibration caused by asymmetric force.

[0043] In some embodiments, for example, Figure 1 , Figure 2 As shown, a through slot 130 is provided on the pad body 100, and the through slot 130 sequentially penetrates the abutment portion 110 and the stabilizing portion 120, and the axis of the through slot 130 coincides with the axis of the stabilizing portion 120. The through slot 130 makes the rubber pad of this embodiment easier to use. When in use, the rod body, shaft body and other parts that need vibration reduction or buffering can be directly inserted into the through slot 130.

[0044] It should be noted that the specific diameter and length of the through groove 130 can be adjusted according to the specific requirements of the variable frequency refrigeration compressor to meet the vibration reduction requirements of variable frequency refrigeration compressors of different models and sizes.

[0045] In some embodiments, for example, Figure 3 , Figure 4 As shown, the stabilizing portion 120 also includes a blind hole 200, which is vertically opened on the stabilizing portion 120, and the blind hole 200 is arranged between the arc surface 121 and the through groove 130. The blind hole 200 can increase the flexibility of the pad body 100, so that it can better absorb the vibration generated during the operation of the compressor and improve the vibration reduction effect. In addition, the blind hole 200 can change the vibration frequency response characteristics of the rubber pad, which helps to reduce the resonance amplitude at a specific frequency, avoid resonance between the pad body 100 and the compressor, and improve the vibration reduction effect. Furthermore, the blind hole 200 also helps to improve the heat dissipation effect of the pad body 100 during operation and reduce the performance degradation caused by high temperature.

[0046] In some embodiments, for example, Figure 3 , Figure 4 As shown, one end of the blind hole 200 extends to the outside of the pad body 100, and the connection point is set on the side of the stabilizing portion 120 away from the abutting portion 110. The blind hole 200 is connected to the outside of the pad body 100, which can ensure the heat dissipation effect of the blind hole 200 and prevent the pad body 100 from being affected by the internal heat accumulation. It can also reduce the difficulty of processing, so that the blind hole 200 of this embodiment can be directly opened on the side of the stabilizing portion 120 away from the abutting portion 110 during the production process, which is easy to manufacture and maintain, simplifies the design and production process, and reduces the difficulty of later inspection.

[0047] In some embodiments, for example, Figure 3 , Figure 4As shown, a plurality of blind holes 200 are evenly distributed circumferentially on the stabilizing portion 120. A plurality of blind holes 200 evenly distributed circumferentially can ensure that the rubber pad is evenly stressed in all directions, reduce the possibility of excessive local stress, and improve the balance of the vibration reduction effect. The plurality of blind holes 200 can also cooperate with the concavely arranged arc surface 121 to further reduce the deformation caused by centrifugal force during the use of the variable frequency refrigeration compressor of this embodiment, thereby ensuring that the vibration reduction support of this embodiment is reliable and stable. The provision of a plurality of blind holes 200 can also increase the flexibility of the rubber pad, so that it can better absorb the vibration generated during the operation of the variable frequency refrigeration compressor and improve the vibration reduction effect.

[0048] In some embodiments, for example, Figures 1 to 4 As shown, the diameter of the stabilizing portion 120 is set to φ1, satisfying: 10mm≤φ1≤50mm. The diameter of the blind hole 200 is set to φ2, satisfying: 3mm≤φ2≤5mm. The diameter of the stabilizing portion 120 is set in a positive correlation with the diameter of the blind hole 200. According to the actual situation of the variable frequency refrigeration compressor and the working scene of this embodiment when in use, the diameter of the stabilizing portion 120 can be set to 10mm to 50mm according to the above factors, so that this embodiment can be applied to a variety of different models and specifications of variable frequency refrigeration compressors, and ensure the reliable vibration reduction ability, thereby improving the applicability of this embodiment. The diameter of the blind hole 200 is set according to the diameter of the stabilizing portion 120. The larger the diameter of the stabilizing portion 120, the larger the diameter of the corresponding blind hole 200, so as to ensure that the blind hole 200 cooperates with the arc surface 121, has sufficient anti-deformation ability, and the blind hole 200 has vibration reduction, heat dissipation and other effects.

[0049] In some embodiments, illustratively, the number of the blind holes 200 is set to A, satisfying: 3≤A≤6. The number of the blind holes 200 is limited to avoid too many blind holes 200, which may affect the overall strength, support capacity and other properties of the stabilizing portion 120, and to avoid too few blind holes 200, which may affect the anti-deformation ability of the stabilizing portion 120, as well as the vibration reduction, heat dissipation and other effects brought by the blind holes 200.

[0050] In some embodiments, for example, Figure 5 , Figure 6As shown, this embodiment is a traditional type of rubber pad, named rubber pad A, which does not have any grooves or holes, etc., and is only suitable for fixed-frequency compressors with a stable rotation speed. The rotation speed of fixed-frequency compressors is fixed and generally between 2950-3000 rpm, that is, maintained at about 3000 rpm. If applied to variable-frequency refrigeration compressors, since the rotation speed of variable-frequency refrigeration compressors is generally between 1500-4500 rpm, when the rotation speed of the variable-frequency refrigeration compressor exceeds 3000 rpm, the outer edge of the rubber pad A will bulge outward under the action of centrifugal force, thereby shortening the length of the rubber pad A in the axial direction, thereby affecting the overall vibration reduction ability.

[0051] In some embodiments, for example, Figure 7 , Figure 8 As shown, this embodiment is another traditional type of rubber pad, named rubber pad B. This type of rubber pad has a deformation hole 300 extending in the circumferential direction in the pad body. In this way, when the rubber pad B is applied to a variable frequency refrigeration compressor and the rotation speed is relatively high, the groove extending in the horizontal direction cannot prevent the rubber pad from bulging outward as a whole, that is, the overall length of the rubber pad B in the axial direction will become shorter, thereby affecting the overall vibration reduction ability.

[0052] In some embodiments, for example, Fig. 9 , Fig.10 As shown, this embodiment is another type of traditional rubber pad, named rubber pad C, in which a special-shaped deformation hole 300 is opened in the pad body. Exemplarily, the deformation hole 300 is set as an L-shaped groove, but the deformation hole 300 is longer in the horizontal circumferential length and shorter in the axial direction. When applied to a variable frequency refrigeration compressor and the speed is high, the groove in the axial direction cannot effectively resist the deformation of the pad body, that is, the outside of the pad body will also bulge outward, thereby shortening the length of the C rubber pad in the axial direction, affecting the vibration reduction ability.

[0053] The vibration reduction ability of rubber pads is mainly reflected in two aspects: stiffness and vibration isolation efficiency. Stiffness refers to the ability of rubber pads to resist deformation, that is, the degree to which rubber pads resist deformation when subjected to centrifugal forces of different magnitudes at different speeds. Isolation efficiency refers to the performance index of rubber pads in isolating vibration transmission, that is, the ability of rubber pads to reduce vibration transmission to another object or system.

[0054] When the rubber pad of this embodiment, as well as the rubber pad A, rubber pad B and rubber pad C in the related art are applied to the variable frequency refrigeration compressor, the stiffness and vibration isolation efficiency of each rubber pad at different speeds of the variable frequency refrigeration compressor are shown in the following table:

[0055]

[0056]

[0057] It can be clearly seen from the above table that although the rubber pad of this embodiment has a relatively low stiffness, the deformation is small and after deformation, it will not affect the vibration reduction ability of the pad body 100, so the overall vibration isolation ability is excellent, especially in the variable frequency refrigeration compressor, when the speed is increased to 4500 rpm, compared with many other rubber pads, the pad body 100 of this embodiment has good vibration isolation efficiency and still has good vibration reduction ability. When the blind hole 200 is not provided in the pad body 100, the vibration isolation efficiency of this embodiment can be made to exceed that of the traditional rubber pad A, rubber pad B and rubber pad C by the concave arc surface 121. After the blind hole 200 is provided in the pad body 100, the vibration isolation efficiency of this embodiment is further improved by the cooperation between the blind hole 200 and the arc surface 121.

[0058] In some embodiments, for example, Figures 1 to 4 As shown, the abutment portion 110 includes an end 111 and a connector 112, the stabilizing portion 120 is disposed at one end of the connector 112, and the end 111 is disposed at an end of the connector 112 away from the stabilizing portion 120. When in use, the end 111, the connector 112 and the stabilizing portion 120 cooperate to ensure the vibration reduction capability of the cushion body 100 of this embodiment. The specific shape and size of the end 111 and the length of the connector 112 can be arbitrarily set according to actual use conditions.

[0059] It should be noted that the thickness of the connecting portion is relatively small, and the overall weight is also relatively small. When in use, the centrifugal force on the connecting portion is also relatively small, that is, the connecting portion will not be severely deformed, affecting the normal operation of this embodiment. Correspondingly, the thickness of the end head 111 is relatively large, but the length of the end head 111 in the axial direction is relatively short, so the deformation resistance of the end head 111 is also relatively strong. When this embodiment is in use, the stabilizing portion 120 mainly deforms according to the rotation speed of the variable frequency refrigeration compressor, and cooperates with the connecting portion and the end head 111, so that the overall embodiment of this embodiment provides suitable vibration reduction capacity.

[0060] The utility model also provides a variable frequency refrigeration compressor, which is equipped with the rubber pad in any one of the above embodiments.

[0061] Since the variable frequency refrigeration compressor of this embodiment includes the rubber pad described in any one of the above embodiments, it also has all the beneficial effects of the above rubber pad, which will not be described in detail here.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rubber pad for a variable frequency refrigeration compressor, characterized in that: include: A cushion body (100), the cushion body (100) comprising an abutment portion (110) and a stabilization portion (120), the abutment portion (110) being arranged at one end of the stabilization portion (120); The stabilizing portion (120) is arranged in a cylindrical shape, and the stabilizing portion (120) comprises a curved surface (121), wherein the curved surface (121) is arranged on a side of the stabilizing portion (120) away from the axis, and the curved surface (121) is arranged concavely in a direction close to the axis of the stabilizing portion (120).

2. The rubber pad according to claim 1, characterized in that: The horizontal plane where the midpoint of the axis of the stabilizing portion (120) is located is set as a symmetry plane (122), and the stabilizing portion (120) is symmetrically arranged along the symmetry plane (122).

3. The rubber pad according to claim 1, characterized in that: The pad body (100) is provided with a through groove (130), the through groove (130) sequentially passes through the abutment portion (110) and the stabilizing portion (120), and the axis of the through groove (130) coincides with the axis of the stabilizing portion (120).

4. The rubber pad according to claim 3, characterized in that: The stabilizing portion (120) further comprises a blind hole (200), wherein the blind hole (200) is vertically opened on the stabilizing portion (120), and the blind hole (200) is arranged between the arc surface (121) and the through groove (130).

5. The rubber pad according to claim 4, characterized in that: One end of the blind hole (200) extends to the outside of the pad body (100), and the connecting point is arranged on a side of the stabilizing portion (120) away from the abutting portion (110).

6. The rubber pad according to claim 4, characterized in that: A plurality of blind holes (200) are evenly distributed circumferentially on the stabilizing portion (120).

7. The rubber pad according to claim 4, characterized in that: The diameter of the stabilizing portion (120) is set to φ1, satisfying: 10 mm ≤ φ1 ≤ 50 mm; The diameter of the blind hole (200) is set to φ2, satisfying: 3mm≤φ2≤5mm; The diameter of the stabilizing portion (120) is arranged in a positive correlation with the diameter of the blind hole (200).

8. The rubber pad according to claim 6, characterized in that: The number of the blind holes (200) is set to A, satisfying: 3≤A≤6.

9. The rubber pad according to claim 1, characterized in that: The abutting portion (110) comprises an end head (111) and a connecting member (112); the stabilizing portion (120) is arranged at one end of the connecting member (112); and the end head (111) is arranged at an end of the connecting member (112) away from the stabilizing portion (120).

10. A variable frequency refrigeration compressor, characterized in that: The variable frequency refrigeration compressor is equipped with the rubber pad described in any one of claims 1 to 9.

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