A cylinder assembly, a pump body structure and a compressor

Abstract

The utility model relates to a cylinder assembly, pump body structure and compressor, cylinder assembly includes cylinder body, sliding block, the middle part of cylinder body is passed through its axial both ends and is provided with compression cavity, the inside wall of compression cavity is recessed and is formed with the sliding slot along the radial direction, the side of sliding slot away from compression cavity is spaced and is provided with the first cooperation part and the second cooperation part with the distance not equal with the center line of compression cavity along the axial direction, sliding block is slidably arranged in the sliding slot, the side surface of sliding block close to compression cavity is eccentric circular surface, the side of sliding block away from compression cavity is spaced and is provided with the first abutment of abutting with the first cooperation part and the second abutment of abutting with the second cooperation part along the axial direction, the utility model promotes the back pressure of sliding block through reducing the pressure of the end of sliding block and piston contact, and through the design of the first abutment and the second abutment of unequal length, prevent the adverse condition of reverse installation of sliding block, effectively solve the adverse phenomenon of "KATA" noise.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a cylinder assembly, pump body structure and compressor. Background Technology

[0002] A rotary compressor works by using a slider to divide the cylinder into intake and exhaust chambers. When the motor is energized, the stator coil generates an electromagnetic field, and the rotor cuts magnetic lines of force to drive the crankshaft of the pump body to rotate, causing the piston to rotate within the cylinder and compress the refrigerant. Under the action of the crankshaft, the volume of the intake and exhaust chambers is continuously changed, drawing in low-temperature, low-pressure gaseous refrigerant and compressing it into high-temperature, high-pressure gaseous refrigerant before expelling it from the pump body, thus completing the cycle.

[0003] During compressor operation, the front end of the slider, under the action of the spring and gas, contacts the outer surface of the piston in the compression chamber of the cylinder, thus forming the intake chamber and the compression chamber. However, in the frequency range of 12Hz-26Hz, due to the small pressure difference between intake and exhaust, the pressure difference between the front and rear ends of the slider is insufficient. This results in the gas force generated by the pressure difference and the elastic force generated by the spring being insufficient to counteract the reciprocating inertial force of the slider and the friction between the slider and the groove. At a certain rotation angle, the front end of the slider is prone to detach from the outer surface of the piston. When they come into contact again, a collision occurs, producing a "KATA" noise. Utility Model Content

[0004] Based on this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a cylinder assembly, pump body structure and compressor. By reducing the pressure at the end of the slider that contacts the piston, the back pressure of the slider is increased. And by designing the first and second abutting parts of different lengths, the reverse installation of the slider is prevented, effectively solving the problem of "KATA" noise.

[0005] To achieve the above objectives, a first aspect of this utility model provides a cylinder assembly, including a cylinder body and a slider. A compression chamber is provided through the middle of the cylinder body and extending to both axial ends. A groove is formed radially recessed on the inner sidewall of the compression chamber, extending through both axial ends of the cylinder body. On the side of the groove away from the compression chamber, a first mating portion and a second mating portion, unequal in distance from the center line of the compression chamber, are provided axially. The slider is slidably disposed in the groove. The side of the slider near the compression chamber is an eccentric arc surface. On the side of the slider away from the compression chamber, a first abutting portion abutting against the first mating portion and a second abutting portion abutting against the second mating portion are provided axially.

[0006] Therefore, the cylinder assembly according to this utility model embodiment, by designing the side of the slider near the compression chamber as an eccentric arc surface, reduces the pressure at the end where the piston contacts the slider, thereby increasing the back pressure at the end of the slider away from the compression chamber. This prevents the piston and slider from separating due to excessive pressure difference, effectively solving the problem of "KATA" noise between the slider and the piston. Furthermore, the cylinder assembly according to this utility model embodiment, by designing a first abutting part and a second abutting part of different lengths on the side of the slider away from the compression chamber, combined with the eccentric arc surface on the side of the slider near the compression chamber, makes the slider directional during installation, effectively preventing reverse installation of the slider and avoiding a drop in back pressure caused by reverse installation, effectively ensuring correct contact between the eccentric arc surface of the slider and the piston.

[0007] In one embodiment, the slider has a first groove between the first abutting portion and the second abutting portion, and the first groove is used to install a spring.

[0008] In one embodiment, the distance difference between the projections of the first abutting portion and the second abutting portion in the axial direction is equal to the distance difference between the projections of the first mating portion and the second mating portion in the axial direction.

[0009] In one embodiment, a piston is provided in the compression chamber, and the outer peripheral surface of the piston abuts against the eccentric arc surface and the inner peripheral wall of the compression chamber, respectively.

[0010] In one embodiment, the cross-sectional profile of the eccentric arc surface in the radial direction is arc-shaped, and the center of the eccentric arc surface is offset from the line connecting the center line of the slider and the compression cavity.

[0011] In one embodiment, the first groove is a trapezoidal groove structure.

[0012] In one embodiment, the slide groove has a second groove formed between the first mating part and the second mating part.

[0013] In one embodiment, the groove has an oil storage tank formed by a recess on one or both sides in the circumferential direction.

[0014] A second aspect of this utility model provides a pump body structure, which includes the cylinder assembly described in any of the preceding embodiments. According to the pump body structure of this utility model embodiment, the back pressure of the slider is increased by reducing the pressure at the end of the slider that contacts the piston, and the design of the first and second abutment portions of different lengths prevents the slider from being installed in reverse, effectively solving the problem of "KATA" noise.

[0015] A third aspect of this utility model provides a compressor comprising the pump body structure described in any of the preceding embodiments. According to this utility model, the compressor increases the back pressure of the slider by reducing the pressure at the end of the slider that contacts the piston, and prevents the slider from being installed in reverse by using a design with first and second abutting portions of different lengths, effectively solving the problem of "KATA" noise.

[0016] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of the cylinder assembly according to an embodiment of the present utility model;

[0018] Figure 2 This is a second schematic diagram of the cylinder assembly according to an embodiment of the present utility model;

[0019] Figure 3 This is the third schematic diagram of the cylinder assembly according to an embodiment of the present utility model;

[0020] Figure 4 for Figure 3 A schematic cross-sectional view along direction AA is shown.

[0021] Figure 5 This is an exploded view of the cylinder assembly according to an embodiment of the present utility model;

[0022] Figure 6 This is one of the structural schematic diagrams of the cylinder block according to an embodiment of the present utility model;

[0023] Figure 7 This is a second schematic diagram of the cylinder body according to an embodiment of the present utility model;

[0024] Figure 8 for Figure 7 A schematic cross-sectional view along the BB direction is shown.

[0025] Figure 9 This is one of the structural schematic diagrams of the slider in an embodiment of this utility model;

[0026] Figure 10 This is a second schematic diagram of the slider structure according to an embodiment of the present utility model;

[0027] Figure 11 This is the fourth schematic diagram of the cylinder assembly according to an embodiment of the present utility model;

[0028] Figure 12 for Figure 11 The diagram shows a cross-sectional view along the CC direction.

[0029] Explanation of reference numerals in the attached drawings: 10, cylinder body; 11, compression chamber; 12, slide groove; 13, first mating part; 14, second mating part; 15, oil reservoir; 16, second groove; 20, slider; 21, eccentric arc surface; 22, first abutting part; 23, second abutting part; 24, first groove. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some embodiments of the present invention, and not all embodiments. 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.

[0031] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0032] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In related technologies, during compressor operation, the front end of the slider, under the action of a spring and gas, contacts the outer surface of the piston in the compression chamber of the cylinder, thus forming an intake chamber and a compression chamber. However, in the frequency range of 12Hz-26Hz, due to the small pressure difference between intake and exhaust, the pressure difference between the front and rear ends of the slider is insufficient. This results in the gas force generated by the pressure difference and the elastic force generated by the spring being insufficient to counteract the reciprocating inertial force of the slider and the friction between the slider and the groove. At a certain rotation angle, the front end of the slider is prone to detach from the outer surface of the piston, and a collision occurs upon re-contact, producing a "KATA" noise.

[0034] In view of this, the present invention provides a cylinder assembly, a pump body structure, and a compressor. According to the cylinder assembly, pump body structure, and compressor of the present invention, the back pressure of the slider 20 is increased by reducing the pressure at the end of the slider 20 that contacts the piston. Furthermore, the design of the first abutment portion 22 and the second abutment portion 23 of different lengths prevents the slider 20 from being installed in reverse, effectively solving the problem of "KATA" noise.

[0035] Please see Figures 1 to 12 The first aspect of this utility model provides a cylinder assembly, including a cylinder body 10 and a slider 20. A compression chamber 11 is provided through the middle of the cylinder body 10 and through both axial ends. A groove 12 is formed radially recessed on the inner sidewall of the compression chamber 11. The groove 12 extends through both axial ends of the cylinder body 10. On the side of the groove 12 away from the compression chamber 11, a first mating part 13 and a second mating part 14 with unequal distances from the center line of the compression chamber 11 are provided axially. The slider 20 is slidably disposed in the groove 12. The side of the slider 20 near the compression chamber 11 is an eccentric arc surface 21. On the side of the slider 20 away from the compression chamber 11, a first abutting part 22 that abuts against the first mating part 13 and a second abutting part 23 that abuts against the second mating part 14 are provided axially.

[0036] The distance difference between the projections of the first abutting portion 22 and the second abutting portion 23 in the axial direction is equal to the distance difference between the projections of the first mating portion 13 and the second mating portion 14 in the axial direction. In other words, the distance difference between the first abutting portion 22 and the second abutting portion 23 in the radial direction is equal to the distance difference between the first mating portion 13 and the second mating portion 14 in the radial direction, so that the first abutting portion 22 and the second abutting portion 23 can simultaneously abut against the first mating portion 13 and the second mating portion 14, respectively.

[0037] Therefore, according to the cylinder assembly of this utility model embodiment, by designing the side of the slider 20 near the compression chamber 11 as an eccentric arc surface 21, the pressure at the end of the piston that contacts the slider 20 is reduced, thereby increasing the back pressure at the end of the slider 20 away from the compression chamber 11. This prevents the piston and slider 20 from separating due to excessive pressure difference, effectively solving the problem of "KATA" noise between the slider 20 and the piston. Furthermore, according to the cylinder assembly of this utility model embodiment, by designing a first abutting part 22 and abutting part 23 of different lengths on the side of the slider 20 away from the compression chamber 11, in conjunction with the eccentric arc surface 21 on the side of the slider 20 near the compression chamber 11, the slider 20 is directional during installation, effectively preventing the slider 20 from being installed in reverse and avoiding a drop in the back pressure of the slider 20 caused by reverse installation. This effectively ensures the correct contact between the eccentric arc surface 21 of the slider 20 and the piston.

[0038] If the slider 20 is installed in reverse, the slider 20 cannot be fully inserted into the slide groove 12 due to the different lengths of the first abutment part 22 and the second abutment part 23. As a result, the assembly personnel can immediately find that the installation direction of the slider 20 is incorrect, effectively avoiding the malfunction of the pump body structure due to the reverse installation of the slider 20.

[0039] Specifically, in this embodiment of the present invention, a piston is provided in the compression cavity 11, and the outer peripheral surface of the piston abuts against the eccentric arc surface and the inner peripheral wall of the compression cavity 11, respectively. The cross-sectional profile of the eccentric arc surface 21 in the radial direction is arc-shaped, and the center of the eccentric arc surface 21 is offset from the line connecting the slider 20 and the center line of the compression cavity 11.

[0040] In order to ensure proper contact between the piston and the eccentric arc surface 21 of the slider 20, the position where the distance from the eccentric arc surface 21 to the center line of the compression chamber 11 is shortest in this embodiment of the invention first contacts the outer circumferential surface of the piston. That is, during the rotation of the piston, when the piston passes through the slide groove 12, the piston first contacts the position where the distance from the eccentric arc surface 21 to the center line of the compression chamber 11 is shortest, and then contacts other positions of the eccentric arc surface 21 in the direction of rotation.

[0041] Furthermore, in this embodiment of the invention, a first groove 24 is provided between the first abutting portion 22 and the second abutting portion 23 of the slider 20, and the first groove 24 is used to install the spring; correspondingly, a second groove 16 is formed between the first mating portion 13 and the second mating portion 14 of the slide groove 12. In this way, the two ends of the spring are respectively abutted in the first groove 24 and the second groove 16.

[0042] Optionally, in some embodiments of this utility model, the first groove 24 is a trapezoidal groove structure.

[0043] Optionally, in some embodiments of the present invention, the groove 12 is recessed on one or both sides in the circumferential direction to form an oil storage groove 15.

[0044] The following is combined Figures 1 to 10 The following is a detailed description of a specific embodiment of the cylinder assembly according to the present invention. It is worth understanding that the following is merely an illustrative description and should not be construed as limiting the present invention.

[0045] This embodiment provides a cylinder assembly, including a cylinder body 10 and a slider 20. A compression chamber 11 is provided through the middle of the cylinder body 10 and through both axial ends. A groove 12 is formed radially recessed on the inner sidewall of the compression chamber 11. The groove 12 passes through both axial ends of the cylinder body 10. On the side of the groove 12 away from the compression chamber 11, a first mating part 13 and a second mating part 14 with unequal distances from the center line of the compression chamber 11 are provided axially. The slider 20 is slidably disposed in the groove 12. The side of the slider 20 near the compression chamber 11 is an eccentric arc surface 21. On the side of the slider 20 away from the compression chamber 11, a first abutting part 22 that abuts against the first mating part 13 and a second abutting part 23 that abuts against the second mating part 14 are provided axially.

[0046] In this embodiment, the distance from the first abutment portion 22 to the center line of the compression cavity 11 is less than the distance from the second abutment portion 23 to the center line of the compression cavity 11. The difference in the axial distance between the projections of the first abutment portion 22 and the second abutment portion 23 is equal to the difference in the axial distance between the projections of the first mating portion 13 and the second mating portion 14. That is, the difference in the radial distance between the first abutment portion 22 and the second abutment portion 23 is equal to the difference in the radial distance between the first mating portion 13 and the second mating portion 14, so that the first abutment portion 22 and the second abutment portion 23 can simultaneously abut against the first mating portion 13 and the second mating portion 14, respectively.

[0047] Specifically, in this embodiment, a piston is disposed in the compression chamber 11, and the outer peripheral surface of the piston abuts against the eccentric arc surface and the inner peripheral wall of the compression chamber 11. The eccentric arc surface 21 has a radially curved cross-sectional profile, and its center is offset from the line connecting the slider 20 and the center line of the compression chamber 11. This can be understood as follows: in this embodiment, the position where the distance from the eccentric arc surface 21 to the center line of the compression chamber 11 is shortest first contacts the outer peripheral surface of the piston. That is, during piston rotation, when the piston passes the slide groove 12, the piston first contacts the position where the distance from the eccentric arc surface 21 to the center line of the compression chamber 11 is shortest, and then contacts other positions on the eccentric arc surface 21 in the direction of rotation.

[0048] Furthermore, in this embodiment, the slider 20 is provided with a first groove 24 between the first abutting part 22 and the second abutting part 23. The first groove 24 is a trapezoidal groove structure and is used to install the spring. Correspondingly, the slide groove 12 is formed with a second groove 16 between the first mating part 13 and the second mating part 14. The two ends of the spring are respectively abutted in the first groove 24 and the second groove 16.

[0049] The following is combined Figure 1 , Figure 2 , Figure 5 , Figure 6, Figure 11 , Figure 12 The following is a detailed description of a specific embodiment of the cylinder assembly according to the present invention. It is worth understanding that the following is merely an illustrative description and should not be construed as limiting the present invention.

[0050] This embodiment provides a cylinder assembly, including a cylinder body 10 and a slider 20. A compression chamber 11 is provided through the middle of the cylinder body 10 and through both axial ends. A groove 12 is formed radially recessed on the inner sidewall of the compression chamber 11. The groove 12 passes through both axial ends of the cylinder body 10. On the side of the groove 12 away from the compression chamber 11, a first mating part 13 and a second mating part 14 with unequal distances from the center line of the compression chamber 11 are provided axially. The slider 20 is slidably disposed in the groove 12. The side of the slider 20 near the compression chamber 11 is an eccentric arc surface 21. On the side of the slider 20 away from the compression chamber 11, a first abutting part 22 that abuts against the first mating part 13 and a second abutting part 23 that abuts against the second mating part 14 are provided axially.

[0051] In this embodiment, the distance from the first abutting portion 22 to the center line of the compression cavity 11 is greater than the distance from the second abutting portion 23 to the center line of the compression cavity 11. The difference in the axial distance between the projections of the first abutting portion 22 and the second abutting portion 23 is equal to the difference in the axial distance between the projections of the first mating portion 13 and the second mating portion 14. That is, the difference in the radial distance between the first abutting portion 22 and the second abutting portion 23 is equal to the difference in the radial distance between the first mating portion 13 and the second mating portion 14, so that the first abutting portion 22 and the second abutting portion 23 can simultaneously abut against the first mating portion 13 and the second mating portion 14, respectively.

[0052] Specifically, in this embodiment, a piston is disposed in the compression chamber 11, and the outer peripheral surface of the piston abuts against the eccentric arc surface and the inner peripheral wall of the compression chamber 11. The eccentric arc surface 21 has a radially curved cross-sectional profile, and its center is offset from the line connecting the slider 20 and the center line of the compression chamber 11. This can be understood as follows: in this embodiment, the position where the distance from the eccentric arc surface 21 to the center line of the compression chamber 11 is shortest first contacts the outer peripheral surface of the piston. That is, during piston rotation, when the piston passes the slide groove 12, the piston first contacts the position where the distance from the eccentric arc surface 21 to the center line of the compression chamber 11 is shortest, and then contacts other positions on the eccentric arc surface 21 in the direction of rotation.

[0053] Furthermore, in this embodiment, the slider 20 is provided with a first groove 24 between the first abutting part 22 and the second abutting part 23. The first groove 24 is a trapezoidal groove structure and is used to install the spring. Correspondingly, the slide groove 12 is formed with a second groove 16 between the first mating part 13 and the second mating part 14. The two ends of the spring are respectively abutted in the first groove 24 and the second groove 16.

[0054] In addition, in this embodiment, the groove 12 is recessed on one or both sides in the circumferential direction to form an oil storage groove 15.

[0055] A second aspect of this utility model provides a pump body structure, which includes the cylinder assembly of any of the above. According to the pump body structure of this utility model embodiment, the back pressure of the slider 20 is increased by reducing the pressure at the end of the slider 20 that contacts the piston, and the design of the first abutment portion 22 and the second abutment portion 23 of different lengths prevents the slider 20 from being installed in reverse, effectively solving the problem of "KATA" noise.

[0056] A third aspect of this utility model provides a compressor that includes the pump body structure described above. According to this utility model, the compressor increases the back pressure of the slider 20 by reducing the pressure at the end of the slider 20 that contacts the piston, and prevents the slider 20 from being installed in reverse by using a design of a first abutment portion 22 and a second abutment portion 23 of different lengths, effectively solving the problem of "KATA" noise.

[0057] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the cylinder assembly, pump body structure, and compressor of this utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A cylinder assembly, characterized in that: The device includes a cylinder body and a slider. A compression chamber is provided through the middle of the cylinder body and extending to both ends of its axial direction. A groove is formed by a radial indentation on the inner sidewall of the compression chamber. The groove extends through both ends of the cylinder body. On the side of the groove away from the compression chamber, a first mating part and a second mating part with unequal distances from the center line of the compression chamber are provided axially. The slider is slidably disposed in the groove. The side of the slider near the compression chamber is an eccentric arc surface. On the side of the slider away from the compression chamber, a first abutting part abutting against the first mating part and a second abutting part abutting against the second mating part are provided axially.

2. The cylinder assembly according to claim 1, characterized in that: The slider has a first groove between the first abutting part and the second abutting part, and the first groove is used to install a spring.

3. The cylinder assembly according to claim 1, characterized in that: The distance difference between the projections of the first abutting part and the second abutting part in the axial direction is equal to the distance difference between the projections of the first mating part and the second mating part in the axial direction.

4. The cylinder assembly according to claim 1, characterized in that: A piston is provided in the compression chamber, and the outer peripheral surface of the piston abuts against the eccentric arc surface and the inner peripheral wall of the compression chamber, respectively.

5. The cylinder assembly according to claim 4, characterized in that: The cross-sectional profile of the eccentric arc surface in the radial direction is arc-shaped, and the center of the eccentric arc surface is offset from the line connecting the center line of the slider and the center line of the compression cavity.

6. The cylinder assembly according to claim 2, characterized in that: The first groove is a trapezoidal groove structure.

7. The cylinder assembly according to claim 2, characterized in that: The groove has a second groove formed between the first mating part and the second mating part.

8. The cylinder assembly according to claim 1, characterized in that: The groove has an oil storage tank formed by a recess on one or both sides in the circumferential direction.

9. A pump body structure, characterized in that: Includes the cylinder assembly according to any one of claims 1 to 8.

10. A compressor, characterized in that: Includes the pump body structure according to claim 9.

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