Variable capacity compressor and air conditioner

Abstract

This invention provides a variable-capacity compressor and an air conditioner. The variable-capacity compressor includes a cylinder, rollers, vanes, and a pin. The cylinder has a cylinder cavity, in which the rollers are disposed. A vane cavity is also provided on the cylinder, in which the vanes are disposed and can move. When the vanes move to contact the rollers, the rollers are normally compressed; when the vanes move to not contact the rollers, the rollers do not participate in compression. The pin includes a pin head and a pin tail. The pin head is closer to the vane cavity than the pin tail and can act on the vanes to lock them. The pin tail is a columnar structure with a first central axis, and the pin head is also a columnar structure with a second central axis. The first and second central axes are not coincident and are eccentrically set with an eccentricity of E1. The second central axis is closer to the central axis of the cylinder than the first central axis. This invention solves the technical problem of vanes colliding with the pin head in existing variable-capacity compressors.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, specifically relating to a variable capacity compressor and an air conditioner. Background Technology

[0002] In existing rotary compressor technology for air conditioning, variable displacement compressors have gained widespread attention due to their ability to adjust output capacity according to load changes, driven by increasing demands for energy saving and space optimization. The common variable displacement mechanism in existing rotary compressors consists of a pin, vanes, a variable displacement physical device (such as a spring or magnet), and pressure chambers at the head and tail of the pin. The vanes, variable displacement cylinder, and baffles and flanges covering both ends of the cylinder form a sealed cavity at the tail of the vanes. This sealed cavity can selectively allow high-pressure or low-pressure gas to pass through. A pin locking and unlocking device is located on the bottom surface of the vanes. This device consists of a pin hole, a pin, and the variable displacement physical device. The head of the pin communicates with the sealed cavity, while the tail of the pin is connected to the low-pressure area via a flow channel. The variable displacement physical device provides a pre-acting force that propels the pin towards the vanes. With this pre-acting force and the combined flow of high and low pressure into the sealed cavity, the pin locking and unlocking process is completed, thereby facilitating the operation and unloading of the variable displacement cylinder.

[0003] However, in existing variable displacement mechanisms, the head and tail of the pin are coaxially integrated. During the movement of the vane in the vane cavity, the pin head may not be fully retracted into the pin hole, leading to collisions between the vane and the pin head, resulting in operating noise. Furthermore, this design fails to meet the requirements for a compact compressor structure. The pin head requires high wear resistance, while the tail requires good low-friction properties to increase lubrication within the pin hole. Therefore, how to achieve further compactness and efficiency in the compressor structure while ensuring the stability of the variable displacement function has become a pressing technical challenge.

[0004] Because existing variable capacity compressors suffer from the problem of vanes colliding with pin heads, leading to technical issues such as operating noise, this invention researches and designs a variable capacity compressor and an air conditioner. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art of variable capacity compressors where the vanes collide with the pin head, resulting in operating noise, thereby providing a variable capacity compressor and an air conditioner.

[0006] To address the above problems, the present invention provides a variable displacement compressor, comprising:

[0007] The cylinder comprises a cylinder cavity, a roller, a slide vane, and a pin. The cylinder has a cylinder cavity, in which the roller is disposed. The cylinder also has a slide vane cavity, in which the slide vane is disposed and can move. When the slide vane moves to contact the roller, the roller is normally compressed; when the slide vane moves to a position where it is not in contact with the roller, the roller does not participate in compression. The pin includes a pin head and a pin tail. The pin head is closer to the slide vane cavity than the pin tail, and the pin head can act on the slide vane to lock it. The pin tail is a columnar structure with a first central axis, and the pin head is also a columnar structure with a second central axis. The first and second central axes are not coincident and are eccentrically positioned with an eccentricity of E1. In the longitudinal section, the second central axis is closer to the central axis of the cylinder than the first central axis.

[0008] In some implementations...

[0009] The pin head and the pin tail are separate structures. The pin tail includes a pin tail base and a pin tail guide post. The pin tail base is a columnar structure with its axis being the first central axis. The pin tail guide post is a structure that protrudes from the end face of the pin tail base toward the sliding cavity and toward the sliding cavity. The pin tail guide post is also a columnar structure with its axis being the second central axis. The pin head is a columnar sleeve structure that is sleeved on the outer periphery of the pin tail guide post, and the central axis of the pin head of the columnar sleeve structure is also the second central axis.

[0010] In some implementations...

[0011] The head of the pin is a cylindrical sleeve with an axial length of F1, an outer diameter of D1, and an inner diameter of D11. The diameter of the guide post at the tail of the pin is D12, and the axial length is F11. F11 < F1, and D11 and D12 satisfy D11-D12 < 0.05mm.

[0012] In some implementations...

[0013] The head and tail of the pin are integrally formed; and / or, the axial end of the tail of the pin away from the head of the pin is provided with a receiving hole, and an elastic element is provided in the receiving hole to provide an elastic preload force to the pin.

[0014] In some implementations...

[0015] The head of the pin is made of ceramic alloy, and the tail of the pin is made of cast iron doped with graphite.

[0016] In some implementations...

[0017] It further includes a flange, which is connected to the end face on one axial side of the cylinder. A pin hole is provided on the flange, at least part of the structure of the pin is arranged in the pin hole, and an eccentric step is further provided on the inner wall of the pin hole, and the eccentric step can block part of the structure of the pin hole;

[0018] The eccentric step is a structure protruding from the inner peripheral wall on one side of the pin hole towards the inner peripheral wall on the other side, and there is a distance greater than 0 between the protruding free end of the eccentric step and the inner peripheral wall on the other side of the pin hole, forming a notch. The notch can accommodate the pin head to pass through and act on the sliding piece. In the longitudinal section, the notch is closer to the central axis of the cylinder relative to the eccentric step.

[0019] In some embodiments,

[0020] The eccentric step is arranged at the axial end of the pin hole connected to the cylinder, and the eccentric step is flush with the opposite axial end face of the cylinder and the axial end face where the flange is connected to the cylinder.

[0021] In some embodiments,

[0022] The diameter of the pin hole is D. In the longitudinal section, the width of the notch along the direction perpendicular to the axial direction of the flange is D2. The central axis of the pin hole is the third central axis, and the central axis of the notch is the fourth central axis. The third central axis and the fourth central axis do not coincide, and they are eccentrically arranged with an eccentricity of E2, and satisfy , where D1 < D2, and D1 is the outer diameter of the pin head.

[0023] In some embodiments,

[0024] The length of the eccentric step along the axial direction of the flange is F2, the axial length of the flange is H2, and in the locked state of the sliding piece: the upper end face of the pin tail does not exceed the lower end face of the eccentric step, and the distance between the upper end face of the pin tail and the lower end face of the eccentric step is h1 > 0, (H2 - F2) - (S + H1 - F1) > 0, where S is the designed stroke of the pin, H1 is the total axial length of the pin, and F1 is the axial length of the pin head.

[0025] In some embodiments,

[0026] It also includes a cover plate, which is disposed on the axial side end face of the flange away from the cylinder. When the end face of the pin tail contacts the cover plate in the free state of the sliding plate, the upper end face of the pin head extends beyond the lower end face of the eccentric step. The distance between the upper end face of the pin head and the lower end face of the eccentric step is h2>0, H1-(H2-F2)>0, where H1 is the total axial length of the pin, F2 is the length of the eccentric step along the axial direction of the flange, and H2 is the axial length of the flange.

[0027] In some implementations...

[0028] The length of the sliding vane along the radial direction of the cylinder is l, the thickness of the roller along the radial direction is c, the inner diameter of the roller is d, e is the crankshaft eccentricity of the compressor, the distance between the first central axis of the pin tail and the central axis of the flange inner hole is m, and the following conditions are met: l+c+d / 2-(e+m-E1)>0.

[0029] The present invention also provides an air conditioner comprising the aforementioned variable capacity compressor.

[0030] The variable capacity compressor and air conditioner provided by this invention have the following beneficial effects:

[0031] This invention addresses the issue of pin head and pin tail being eccentrically positioned, with the second central axis of the pin head being closer to the cylinder's central axis than the first central axis of the pin tail. This allows the pin head to be closer to the radially inner side of the cylinder than the pin tail, ensuring that the vane can stably press the pin during movement, especially when moving towards the cylinder cavity to its limit position. This prevents the pin from springing into the vane cavity, effectively avoiding the pin head entering the vane cavity and affecting the vane's movement, thus preventing impact. This invention effectively solves the technical problem of vane and pin head impact in existing variable displacement compressors. Attached Figure Description

[0032] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0033] Figure 1 This is a longitudinal sectional view of the variable capacity compressor of the present invention;

[0034] Figure 2 yes Figure 1 Exploded view of the pin section;

[0035] Figure 3 yes Figure 1 Assembly structure diagram of the pin part;

[0036] Figure 4 yes Figure 1 Dimensional structure diagram of the flange section;

[0037] Figure 5 yes Figure 1 A partial structural diagram of the cylinder pin portion in the sliding vane locked state;

[0038] Figure 6 yes Figure 1 A partial structural diagram of the cylinder pin portion in the free state of the sliding vane;

[0039] Figure 7 This is a partial structural diagram of the cylinder pin part in the prior art when the sliding vane is located at the rightmost end;

[0040] Figure 8 yes Figure 7 A magnified view of part B;

[0041] Figure 9 This is a partial structural diagram of the cylinder pin portion of the present invention when the sliding vane is located at the rightmost end;

[0042] Figure 10 yes Figure 9 A magnified view of part C;

[0043] Figure 11 This is a diagram of the pin structure of an alternative embodiment of the present invention;

[0044] Figure 12 This is a schematic diagram of the variable displacement cylinder of the present invention.

[0045] The attached figures are labeled as follows:

[0046] 1. Cylinder; 2. Roller; 3. Slider; 4. Pin; 41. Pin head; 42. Pin tail; 43. Pin tail base; 44. Pin tail guide post; 45. Receiving hole; 5. Slider cavity; 6. Flange; 7. Pin hole; 8. Eccentric step; 9. Notch; 10. Cover plate; 11. Elastic element. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0049] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0050] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0051] See also Figure 1-12 As shown, according to an embodiment of the present invention, a variable displacement compressor (a variable displacement rotary compressor having an eccentric combined pin structure) is provided, comprising:

[0052] The cylinder 1 comprises a cylinder cavity, a roller 2, a slide 3, and a pin 4. The cylinder 1 has a cylinder cavity, and the roller 2 is disposed in the cylinder cavity. The cylinder 1 also has a slide cavity 5, and the slide 3 is disposed in the slide cavity 5 and can move within the slide cavity 5. When the slide 3 moves to contact the roller 2, the roller 2 is normally compressed. When the slide 3 moves to not contact the roller 2, the roller 2 does not participate in compression. The pin 4 includes a pin head 41 and a pin tail 42. The pin head 41 is closer to the slide cavity 5 than the pin tail 42, and the pin head 41 can act on the slide 3 to lock the slide 3. The pin tail 42 is a columnar structure with a first central axis, and the pin head 41 is also a columnar structure with a second central axis. The first central axis and the second central axis do not coincide and are eccentrically set with an eccentricity of E1.

[0053] In the longitudinal section, the second central axis is closer to the central axis of the cylinder 1 than the first central axis (that is, the pin head 41 is closer to the central axis of the cylinder 1 than the pin tail 42).

[0054] This invention, through the aforementioned eccentric design of the pin head and tail, particularly with the second central axis of the pin head being closer to the cylinder's central axis than the first central axis of the pin tail, allows the pin head to be closer to the radially inner side of the cylinder than the pin tail. This ensures that the vane can stably press the pin during movement, especially when moving towards its limit position inside the cylinder cavity, preventing the pin from springing into the vane cavity. This effectively avoids the pin head entering the vane cavity and affecting the vane's movement, thus preventing impact. It effectively solves the technical problem of vane-pin head impact in existing variable displacement compressors. Furthermore, the eccentric design of the pin head and tail also facilitates optimized internal space layout of the compressor, effectively supporting the overall miniaturization of the compressor and improving its reliability.

[0055] This invention solves the technical problems of large variable displacement pin size and poor operational stability in existing air conditioning rotary compressors. By optimizing the structural fit between the variable displacement pin and the lower flange, the compactness and reliability of the compressor are improved.

[0056] Example 1, such as Figure 2-3 In some implementation methods,

[0057] The pin head 41 and the pin tail 42 are of a split structure. The pin tail 42 includes a pin tail base 43. The pin 4 further includes a pin tail guide post 44. The pin tail base 43 is of a columnar structure, and its central axis is the first central axis. The pin tail guide post 44 is a structure protruding towards the sliding piece cavity 5 on the end face of the pin tail base 43 facing the sliding piece cavity 5. The pin tail guide post 44 is also of a columnar structure, and its central axis is the second central axis. The pin head 41 is of a columnar sleeve structure, which is sleeved on the outer periphery of the pin tail guide post 44, and the central axis of the columnar sleeve structure of the pin head 41 is also the second central axis.

[0058] This is the preferred structural form of the pin head and the pin tail of the present invention, that is, it is set as a split structure. In particular, the pin further includes a pin tail guide post protruding towards the sliding piece cavity on the pin tail base. At the same time, the pin head is set as a sleeve structure, which can use the guide post to socket the pin head, so as to complete the connection between the pin head and the pin tail, ensure that the pin head and the pin tail can move integrally without separation, and the pin head can be close to the inner side of the cylinder, ensure that the pin can still be stably pressed in the pin hole during the process of the sliding piece moving towards the radial inner side (especially when moving to the limit position), ensure that the pin will not pop out into the sliding piece cavity, thereby effectively preventing the situation of the sliding piece hitting the pin and improving the operation stability of the cylinder.

[0059] In some embodiments,

[0060] The pin head 41 is a cylindrical sleeve, its axial length is F1, the outer diameter is D1, the inner diameter is D11, the diameter of the pin tail guide post 44 is D12, the axial length is F11, and there is F11 < F1, and D11 and D12 satisfy D11 - D12 < 0.05 mm.

[0061] Through the above preferred dimensional relationships of the present invention, that is, the height F1 of the pin head and the height F11 of the tail guide post satisfy F11 < F1, and the inner diameter D11 of the pin head and the diameter D12 of the tail guide post satisfy D11 - D12 < 0.05 mm, it can make the pin head exceed the guide post and contact the sliding piece, the guide post will not extend out of the pin head, and a clearance fit is formed between the pin head and the guide post, which can make the pin head rotate around the tail guide post automatically, and automatically adjust the position of the pin head during the process of being inserted and mated with the pin hole of the sliding piece, effectively reducing power consumption.

[0062] Embodiment 2, as Figure 11 , in some embodiments,

[0063] The pin head 41 and the pin tail 42 are integrally formed; and / or, the axial end of the pin tail 42 away from the pin head 41 is provided with a receiving hole 45, and an elastic element 11 is provided in the receiving hole to provide an elastic preload force to the pin 4.

[0064] This is a preferred structural form of the alternative embodiment of the pin of the present invention. The pin head and pin tail are integrally formed, which can ensure that the head and tail can move together without separation. Furthermore, the pin head can be close to the inner side of the cylinder, ensuring that the pin is stably pressed in the pin hole during the radial inward movement of the slide (especially when it moves to the limit position), and that the pin will not pop out into the slide cavity. This effectively prevents the slide and the pin from colliding, and improves the operating stability of the cylinder.

[0065] Preferably, the pin structure of the present invention also has a receiving hole at the end of the pin tail away from the head, which can accommodate an elastic element, thereby providing a preload force toward the slide cavity to the pin structure, ensuring that the pin can lock or unlock the slide as needed, and realize the unloading or loading process of the roller.

[0066] In some implementations...

[0067] The head 41 of the pin is made of ceramic alloy (the head is made of wear-resistant material to improve wear resistance), and the tail 42 of the pin is made of cast iron doped with graphite material.

[0068] The present invention also preferably adopts a design in which the head and tail of the pin are made of different materials, which can ensure both the wear resistance of the head and the lubrication of the tail, effectively reducing the power consumption of the switching mechanism of the variable capacity compressor and improving the mechanical efficiency and reliability of the variable capacity compressor.

[0069] In some implementations...

[0070] It also includes a flange 6, which is connected to one axial end face of the cylinder 1. The flange 6 is provided with a pin hole 7, and at least a part of the structure of the pin 4 is provided in the pin hole 7. An eccentric step 8 is also provided on the inner wall of the pin hole 7, and the eccentric step 8 can cover part of the structure of the pin hole 7.

[0071] The eccentric step 8 is a structure that protrudes from one side of the inner peripheral wall of the pin hole 7 toward the other side of the inner peripheral wall, and the free end of the protrusion of the eccentric step 8 is spaced apart from the other side of the inner peripheral wall of the pin hole 7 by a distance greater than 0, forming a notch 9. The notch 9 can accommodate the pin head 41 to pass through and act on the slide plate 3. In the longitudinal section, the notch 9 is closer to the central axis of the cylinder 1 than the eccentric step 8.

[0072] This is the preferred structural form of the pin hole on the flange of the present invention. By providing an eccentric step on the outer side of the pin hole in the radial direction and forming a notch at a position relatively closer to the inner side in the radial direction, a structure that can accommodate the pin head to pass through can be formed. Moreover, since the notch is limited to a position relatively closer to the inner side in the radial direction of the pin hole, the pin head can move to the inner side in the radial direction. Thus, when the sliding piece moves to the innermost limit position in particular in the radial direction, the pin head can still be stably pressed inside the pin hole, ensuring that the pin head does not protrude into the sliding piece cavity and cause a collision with the sliding piece, thereby improving the stability of the cylinder operation.

[0073] In some embodiments,

[0074] The eccentric step 8 is provided at an axial end of the pin hole 7 that is in contact with the cylinder 1, and the axial end face of the eccentric step 8 opposite to the cylinder 1 is flush with the axial end face where the flange 6 is in contact with the cylinder 1.

[0075] This is a further preferred structural form of the eccentric step of the present invention, that is, its axial end face facing the cylinder is flush with the axial end face of the flange facing the cylinder, which can enable effective fitting with the cylinder and reduce the generated gaps, ensuring the sealing performance inside the cylinder.

[0076] In some embodiments,

[0077] The diameter of the pin hole 7 is D. In the longitudinal section, the width of the notch 9 along the direction perpendicular to the axial direction of the flange 6 is D2. The central axis of the pin hole 7 is the third central axis, and the central axis of the notch 9 is the fourth central axis. The third central axis and the fourth central axis do not coincide, and they are eccentrically arranged with an eccentricity of E2, and satisfy , where D1 < D2, and D1 is the outer diameter of the pin head 41.

[0078] Through the associated limitation of the above parameters in the present invention, that is , where D1 < D2, it can ensure that the pin runs without interference in the pin hole. In particular, the pin head can also run without interference in the notch, reducing the vibration and noise caused by interference and also reducing energy consumption.

[0079] In some embodiments,

[0080] The eccentric step 8 has a length of F2 along the axial direction of the flange 6, and the axial length of the flange 6 is H2. In the locked state of the slide plate 3, the upper end face of the pin tail 42 does not exceed the lower end face of the eccentric step 8, and the distance between the upper end face of the pin tail 42 and the lower end face of the eccentric step 8 is h1>0, (H2-F2)-(S+H1-F1)>0, where S is the design stroke of the pin, H1 is the total axial length of the pin 4, and F1 is the axial length of the pin head 41.

[0081] By limiting the pin parameters in the slider locking state as described above, i.e., h1>0, (H2-F2)-(S+H1-F1)>0, the present invention can prevent the upper end of the pin tail from hitting the lower end face of the eccentric step, so that there is no interference during operation, reducing vibration and noise caused by interference, and also reducing energy consumption.

[0082] In some implementations...

[0083] It also includes a cover plate 10, which is disposed on the axial side end face of the flange 6 away from the cylinder 1. When the end face of the pin tail 42 contacts the cover plate 10 in the free state of the sliding plate 3, the upper end face of the pin head 41 extends beyond the lower end face of the eccentric step 8. The distance between the upper end face of the pin head 41 and the lower end face of the eccentric step 8 is h2>0, H1-(H2-F2)>0, where H1 is the total axial length of the pin 4, F2 is the length of the eccentric step 8 along the axial direction of the flange 6, and H2 is the axial length of the flange 6.

[0084] By restricting the pin parameters in the free state of the slide plate, i.e., h2>0, H1-(H2-F2)>0, the present invention can prevent the pin head from colliding with the flange step due to the pin rotating in the flange pin hole, thereby further avoiding interference, reducing vibration and noise caused by interference, and reducing energy consumption.

[0085] In some implementations...

[0086] The length of the sliding vane 3 along the radial direction of the cylinder 1 is l, the thickness of the roller 2 along the radial direction is c, the inner diameter of the roller 2 is d, e is the crankshaft eccentricity of the compressor, the distance between the first central axis of the pin tail 42 and the central axis of the inner hole of the flange 6 is m, and the condition l+c+d / 2-(e+m-E1)>0 is satisfied.

[0087] like Figure 7-8 This diagram shows the positional relationship between the pin structure and the slider structure in the prior art. At this point, the slider is located at the innermost radial side. Figure 7-8On the far right, at this time l+c+d / 2-(e+m)<0, the outermost radial end of the slider does not cover the second central axis of the pin head. At this time, the pin will pop up into the slider cavity, thereby hindering the movement of the slider, causing an impact, and generating the impact noise problem that this invention aims to solve.

[0088] And such Figure 9-10 When the slider of this invention is located on the far right (innermost radial direction), it satisfies l+c+d / 2-(e+m-E1)>0, which allows the outermost radial end of the slider to cover the second central axis of the pin head or even further to the left. At this time, it can effectively press the pin in the pin hole and prevent it from popping upward into the slider cavity, effectively avoiding the pin from hindering the movement of the slider and avoiding impact. It can effectively solve the problem of impact noise that easily occurs between the pin and the slider during operation.

[0089] The above structural design enables the variable displacement pin to remain stable under the miniaturized design of the compressor. By rationally selecting materials and geometric parameters, the operating efficiency of the compressor and the reliability of the variable displacement mechanism are improved.

[0090] The present invention also provides an air conditioner comprising the aforementioned variable capacity compressor.

[0091] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features and embodiments of the above-described methods can be freely combined and superimposed.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A variable displacement compressor, characterized in that: include: The cylinder (1), roller (2), slide (3), and pin (4) are provided. The cylinder (1) has a cylinder cavity inside, and the roller (2) is disposed in the cylinder cavity. The cylinder (1) also has a slide cavity (5). The slide (3) is disposed in the slide cavity (5) and can move in the slide cavity (5). When the slide (3) moves to contact with the roller (2), the roller (2) is normally compressed. When the slide (3) moves to not contact with the roller (2), the roller (2) does not participate in compression. The pin (4) includes a pin head (41) and a pin tail (42). The pin head (41) is closer to the slide cavity (5) than the pin tail (42), and the pin head (41) can act on the slide (3) to lock the slide (3). The pin tail (42) is a columnar structure with a first central axis, and the pin head (41) is also a columnar structure with a second central axis. The first central axis and the second central axis do not coincide and are eccentrically set with an eccentricity of E1. In the longitudinal section, the second central axis is closer to the central axis of the cylinder (1) than the first central axis.

2. The variable displacement compressor according to claim 1, characterized in that: The pin head (41) and the pin tail (42) are separate structures. The pin tail (42) includes a pin tail base (43). The pin (4) also includes a pin tail guide post (44). The pin tail base (43) is a columnar structure with its axis being the first central axis. The pin tail guide post (44) is a structure that protrudes towards the slide cavity (5) on the end face of the pin tail base (43) facing the slide cavity (5). The pin tail guide post (44) is also a columnar structure with its axis being the second central axis. The pin head (41) is a columnar sleeve structure that is sleeved on the outer periphery of the pin tail guide post (44). The central axis of the pin head (41) of the columnar sleeve structure is also the second central axis.

3. The variable displacement compressor according to claim 2, characterized in that: The head of the pin (41) is a cylindrical sleeve with an axial length of F1, an outer diameter of D1, and an inner diameter of D11. The diameter of the guide post (44) at the tail of the pin is D12, and the axial length is F11. F11 < F1, and D11 and D12 satisfy D11-D12 < 0.05mm.

4. The variable displacement compressor according to claim 1, characterized in that: The pin head (41) and the pin tail (42) are integrally formed; and / or, the pin tail (42) is provided with a receiving hole (45) at the axial end away from the pin head (41), and an elastic element (11) is provided in the receiving hole to provide an elastic preload to the pin (4).

5. The variable displacement compressor according to claim 1, characterized in that: The head (41) of the pin is made of ceramic alloy, and the tail (42) of the pin is made of cast iron doped with graphite.

6. The variable displacement compressor according to claim 1, characterized in that: It also includes a flange (6), which is connected to one side of the axial end face of the cylinder (1). The flange (6) is provided with a pin hole (7), at least part of the structure of the pin (4) is provided in the pin hole (7), and an eccentric step (8) is also provided on the inner wall of the pin hole (7). The eccentric step (8) can cover part of the structure of the pin hole (7). The eccentric step (8) is a structure that protrudes from one side of the inner peripheral wall of the pin hole (7) toward the other side of the inner peripheral wall. The free end of the eccentric step (8) is spaced at a distance greater than 0 from the other side of the inner peripheral wall of the pin hole (7), forming a notch (9). The notch (9) can accommodate the pin head (41) to pass through and act on the slide (3). In the longitudinal section, the notch (9) is closer to the central axis of the cylinder (1) than the eccentric step (8).

7. The variable displacement compressor according to claim 6, characterized in that: The eccentric step (8) is located at the axial end of the pin hole (7) that is connected to the cylinder (1), and the axial end face of the eccentric step (8) opposite to the cylinder (1) is flush with the axial end face of the flange (6) that is connected to the cylinder (1).

8. The variable displacement compressor according to claim 6, characterized in that: The diameter of the pin hole (7) is D. In the longitudinal section, the width of the notch (9) along the direction perpendicular to the axial direction of the flange (6) is D2. The central axis of the pin hole (7) is the third central axis, and the central axis of the notch (9) is the fourth central axis. The third central axis does not coincide with the fourth central axis, and they are eccentrically arranged with an eccentricity of E2, and satisfy , where D1 < D2, and D1 is the outer diameter of the pin head (41).

9. The variable displacement compressor according to claim 6, characterized in that: The length of the eccentric step (8) along the axial direction of the flange (6) is F2, the axial length of the flange (6) is H2, and in the locked state of the slide (3): the upper end face of the pin tail (42) does not exceed the lower end face of the eccentric step (8), the distance between the upper end face of the pin tail (42) and the lower end face of the eccentric step (8) is h1>0, (H2-F2)-(S+H1-F1)>0, where S is the design stroke of the pin, H1 is the total axial length of the pin (4), and F1 is the axial length of the pin head (41).

10. The variable displacement compressor according to claim 6, characterized in that: It also includes a cover plate (10), which is disposed on the axial side end face of the flange (6) away from the cylinder (1). When the end face of the pin tail (42) contacts the cover plate (10) in the free state of the slide plate (3), the upper end face of the pin head (41) extends beyond the lower end face of the eccentric step (8). The distance between the upper end face of the pin head (41) and the lower end face of the eccentric step (8) is h2>0, H1-(H2-F2)>0, where H1 is the total axial length of the pin (4), F2 is the length of the eccentric step (8) along the axial direction of the flange (6), and H2 is the axial length of the flange (6).

11. The variable displacement compressor according to claim 6, characterized in that: The length of the sliding vane (3) along the radial direction of the cylinder (1) is l, the thickness of the roller (2) along the radial direction is c, the inner diameter of the roller (2) is d, e is the crankshaft eccentricity of the compressor, the distance between the first central axis of the pin tail (42) and the central axis of the inner hole of the flange (6) is m, and satisfies l+c+d / 2-(e+m-E1)>0.

12. An air conditioner, characterized in that, The variable displacement compressor includes any one of claims 1-11.

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