Exhaust valve plate, pump body assembly, compressor and air conditioner

Abstract

This invention provides an exhaust valve plate, a pump assembly, a compressor, and an air conditioner. The exhaust valve plate includes a fixing part (71), a connecting part (72), and a head (73). The fixing part (71) is provided with a mounting hole (74) and is configured to assemble and fix the exhaust valve plate. The connecting part (72) connects the fixing part (71) and the head (73). The head (73) is configured to cover the flange exhaust port (11). The connecting part (72) and the head (73) together form a free bending section (82). The first-order structural modal frequency of the exhaust valve plate is f1, the second-order structural modal frequency is f2, and the maximum operating frequency of the compressor is f. The parameters f1, f2, and f satisfy: f1 > 2f, f2 > 10f. According to the exhaust valve plate of this invention, the valve plate structural modal shape can be optimized, reducing the risk of modal resonance caused by the excitation of the valve plate's order modal frequencies, and reducing the high-frequency vibration noise caused by this.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically, to an exhaust valve plate, a pump assembly, a compressor, and an air conditioner. Background Technology

[0002] The rotary compressor pump body assembly includes major components such as cylinders, rollers, crankshaft, vanes, and upper and lower flanges. These components work together to form a sealed intake and exhaust chamber. Driven by the rotation of the crankshaft, the volume of the compressor's intake and exhaust chambers changes, thus realizing the compressor's periodic intake, compression, and exhaust processes. The valve plate, mounted on the flange exhaust port, is one of the core components of the rotary compressor pump body assembly. It opens and closes periodically with the compressor's intake and exhaust processes. When the gas pressure in the exhaust chamber reaches a certain critical value, the exhaust valve plate opens until the pressure inside the exhaust chamber is lower than the external pressure of the pump body, at which point the valve plate closes, completing one exhaust cycle of the compressor.

[0003] The exhaust valve disc mainly consists of three parts: a fixing part, a connecting part, and a head. The fixing part has mounting holes for assembling and fixing the exhaust valve disc onto the flange. Traditional exhaust valve discs have a uniform thickness structure, characterized by a parallel section design for the fixing part, and a connecting part that connects the fixing part and the head, which is a narrower, uniform width design than the fixing part. A valve disc limiter with a certain bending stroke is mounted on the back of the valve disc. When the valve disc opens, the connecting part and the head of the valve disc gradually wrap around the curved surface of the limiter, thus providing a certain limiting constraint on the opening of the valve disc.

[0004] With the rapid miniaturization of compressors, the operating frequency of compressors is gradually increasing. For high-frequency compressors, the high-frequency opening and closing of the exhaust valve plate leads to high-frequency vibration noise and valve plate reliability issues, which are bottleneck problems that urgently need to be solved in the development of high-speed compressors. Summary of the Invention

[0005] The main objective of this invention is to provide an exhaust valve plate, a pump assembly, a compressor, and an air conditioner that can optimize the valve plate structure mode shape, reduce the risk of modal resonance caused by the excitation of the valve plate order mode frequency, and reduce the high-frequency vibration noise resulting therefrom.

[0006] To achieve the above objectives, according to one aspect of the present invention, an exhaust valve plate is provided, comprising a fixing part, a connecting part, and a head. The fixing part is provided with a mounting hole and is configured to assemble and fix the exhaust valve plate. The connecting part connects the fixing part and the head, and the head is configured to cover the exhaust port of the flange. The connecting part and the head together form a free bending section. The first-order structural modal frequency of the exhaust valve plate is f1, the second-order structural modal frequency is f2, the maximum operating frequency of the compressor is f, and the parameters f1, f2, and f satisfy: f1 > 2f, f2 > 10f.

[0007] Furthermore, the first-order structural modal frequency of the exhaust valve plate is f1∈[240,900], and the second-order structural modal frequency is f2∈[1200,2500].

[0008] Furthermore, the first-order structural modal frequency of the exhaust valve plate is f1∈[280,650], and the second-order structural modal frequency is f2∈[1400,2100].

[0009] Furthermore, the maximum operating frequency of the compressor is f≥120Hz.

[0010] Furthermore, 120Hz≤f≤200Hz.

[0011] Furthermore, 140Hz≤f≤180Hz.

[0012] Furthermore, the width of the connecting part increases along the direction from the fixing part to the head.

[0013] Furthermore, the sidewall of the connecting part is tangent to the sidewall of the head at the connection position.

[0014] Furthermore, the connecting part is provided with a perforated hole, which extends from the fixing part toward the head.

[0015] Furthermore, taking the plane passing through the center line of the mounting hole and the center line of the head as the first plane, the perforated holes are in at least two rows, with at least two rows of perforated holes distributed on both sides of the first plane.

[0016] Furthermore, at least two rows of perforated holes are symmetrical about the first plane; and / or, along the direction from the fixing part to the head, the spacing between at least two rows of perforated holes on both sides of the first plane increases.

[0017] Furthermore, each column of perforated holes includes one elongated perforated hole; or, each column of perforated holes includes at least two elongated perforated holes, and the arrangement direction of the perforated holes in the same column is consistent with the length extension direction of the perforated holes.

[0018] According to another aspect of the invention, a pump body assembly is provided, including an exhaust valve plate, which is the exhaust valve plate described above.

[0019] According to another aspect of the present invention, a compressor is provided, comprising the above-described exhaust valve plate or the above-described pump body assembly.

[0020] According to another aspect of the present invention, an air conditioner is provided, including a compressor, which is the compressor described above.

[0021] According to the technical solution of this invention, the exhaust valve plate includes a fixing part, a connecting part, and a head. The fixing part is provided with a mounting hole and is configured to assemble and fix the exhaust valve plate. The connecting part connects the fixing part and the head, and the head is configured to cover the exhaust port of the flange. The connecting part and the head together form a free bending section. The first-order structural modal frequency of the exhaust valve plate is f1, the second-order structural modal frequency is f2, and the maximum operating frequency of the compressor is f. The parameters f1, f2, and f satisfy: f1 > 2f, f2 > 10f. By optimizing the valve plate structural modal vibration mode, the risk of modal resonance caused by the excitation of its order modes during high-frequency opening and closing operation and impact limiter of the valve plate can be reduced, effectively reducing the high-frequency vibration noise caused by this. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 A schematic diagram of the structure of an exhaust valve plate according to an embodiment of the present invention is shown;

[0024] Figure 2 A schematic diagram of the structure of an exhaust valve plate according to an embodiment of the present invention is shown;

[0025] Figure 3 A schematic diagram of the structure of an exhaust valve plate according to an embodiment of the present invention is shown;

[0026] Figure 4 A schematic diagram of the cooperation structure between the exhaust valve plate and the limiter according to an embodiment of the present invention is shown;

[0027] Figure 5 A schematic diagram of the pump body assembly according to an embodiment of the present invention is shown;

[0028] Figure 6 It shows Figure 5 A magnified structural diagram at point k;

[0029] Figure 7 A schematic diagram of the cylinder structure of the pump body assembly according to an embodiment of the present invention is shown;

[0030] Figure 8 A stress distribution cloud diagram of an exhaust valve plate according to an embodiment of the present invention is shown;

[0031] Figure 9 A stress distribution cloud diagram of an exhaust valve plate according to an embodiment of the present invention is shown;

[0032] Figure 10 This is a comparison diagram of the noise and vibration spectra of the valve plate structure in this invention and the valve plate structure in related technologies; and

[0033] Figure 11 This is a comparison diagram of the vibration acceleration spectrum of the valve plate structure in this embodiment of the invention and the valve plate structure in related technologies.

[0034] The above figures include the following reference numerals:

[0035] 1. Upper flange; 11. Flange exhaust port; 2. Cylinder; 21. Intake chamber; 22. Exhaust chamber; 3. Crankshaft; 4. Roller; 5. Lower flange; 6. Sliding vane; 7. Exhaust valve plate; 71. Fixing part; 72. Connecting part; 721. Hole; 73. Head; 74. Mounting hole; 8. Limiter; 81. Straight section; 82. Bending section; 9. Rivet. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] See Figures 5 to 7 As shown, the pump body assembly of the rotary compressor includes main components such as upper flange 1, cylinder 2, crankshaft 3, roller 4, lower flange 5, sliding vane 6, exhaust assembly exhaust valve plate 7, and limiter 8. These components cooperate to form a sealed intake chamber 21 and exhaust chamber 22. Under the rotational drive of the crankshaft 3, the volume of the compressor intake chamber 21 and exhaust chamber 22 changes, thereby realizing the periodic intake, compression, and exhaust process of the compressor.

[0038] The flange has a flange vent 11, and an exhaust valve 7 is mounted on and covers the flange vent 11, opening and closing periodically as the compressor draws in and discharges gas. When the gas pressure in the exhaust chamber reaches a certain critical value, the exhaust valve 7 opens until the pressure in the exhaust chamber 22 is lower than the external pressure of the pump body, at which point the exhaust valve 7 closes, completing one exhaust process of the compressor.

[0039] The exhaust valve plate 7 consists of three parts: a fixing part 71, a connecting part 72, and a head 73. The fixing part 71 is provided with a mounting hole 74 for assembling and fixing the exhaust valve plate 7 onto the upper flange 1. A valve plate limiter 8 with a certain bending stroke is mounted on the back of the exhaust valve plate 7. The limiter 8 includes a straight section 81 and a curved section 82. The straight section 81 cooperates with the fixing part 71 of the exhaust valve plate 7 for fixation. When the exhaust valve plate 7 is opened, the valve plate connecting part 72 and the head 73 gradually wrap around and adhere to the curved surface of the curved section 82 of the limiter 8, thereby providing a certain limiting constraint on the opening of the exhaust valve plate 7.

[0040] With the rapid miniaturization of compressors, the operating frequency of compressors is gradually increasing. For high-frequency compressors, the high-frequency opening and closing of the exhaust valve plate leads to high-frequency vibration noise and valve plate reliability issues, which are bottleneck problems that urgently need to be solved in the development of high-speed compressors.

[0041] Based on the above analysis, in order to solve the problems that occur when the compressor operates at high frequency, see [reference needed]. Figures 1 to 6 As shown, according to an embodiment of the present invention, an exhaust valve plate is characterized by comprising a fixing part 71, a connecting part 72, and a head 73. The fixing part 71 is provided with a mounting hole 74 and is configured to assemble and fix the exhaust valve plate. The connecting part 72 connects the fixing part 71 and the head 73. The head 73 is configured to cover the exhaust port 11 of the flange. The connecting part 72 and the head 73 together form a free bending section 82. The first-order structural modal frequency of the exhaust valve plate is f1, the second-order structural modal frequency is f2, the maximum operating frequency of the compressor is f, and the parameters f1, f2, and f satisfy: f1 > 2f, f2 > 10f.

[0042] By optimizing the valve plate structure mode shape, the risk of modal resonance caused by the excitation of its order modes during the high-frequency opening and closing operation of the valve plate and the impact limiter 8 can be reduced, which can effectively reduce the high-frequency vibration noise caused by this and improve the reliability of the valve plate.

[0043] In one embodiment, the first-order structural modal frequency of the exhaust valve plate is f1∈[240,900], and the second-order structural modal frequency is f2∈[1200,2500].

[0044] In one embodiment, the first-order structural modal frequency of the exhaust valve plate is f1∈[280,650], and the second-order structural modal frequency is f2∈[1400,2100].

[0045] Compared to valve plate structures in related technologies, the valve plate structure of this invention can optimize noise and vibration to a certain extent. See [link to relevant documentation]. Figure 10 and Figure 11 The figure shows a comparison of the noise and vibration spectrum of the valve plate structure of the present invention and the valve plate structure of related technologies at a mechanical operating frequency of 150Hz, as well as a comparison of the vibration acceleration spectrum. It can be seen from the figure that after adopting the valve plate structure of the present invention, the noise peak and vibration octave peak of the compressor are significantly reduced.

[0046] In one embodiment, the maximum operating frequency of the compressor is f ≥ 120 Hz.

[0047] In one embodiment, 120Hz ≤ f ≤ 200Hz.

[0048] In one embodiment, 140Hz ≤ f ≤ 180Hz.

[0049] When the compressor operates within the aforementioned frequency range, the exhaust valve plate of this embodiment of the invention can exhibit more significant advantages in noise reduction, vibration damping, and reliability.

[0050] In one embodiment, the width of the connecting portion 72 increases along the direction from the fixing portion 71 to the head 73.

[0051] In one embodiment, the sidewall of the connecting portion 72 is tangent to the sidewall of the head 73 at the connecting position.

[0052] Specifically, when projecting along the central axis of the head 73, the two sides of the connecting part 72 are straight edges, and the two sides are tangent to the outer circle of the head 73 at the position where they connect with the head 73.

[0053] The above structure can improve the valve plate stiffness of the free bending section of the exhaust valve plate during the process of gradually opening and wrapping around the bending section 82 of the limiter 8, which is beneficial to the low-frequency opening and high-frequency rebound of the exhaust valve plate, thereby improving the compressor energy efficiency.

[0054] In one embodiment, the stress distribution of the exhaust valve plate is as follows: Figure 8 As shown.

[0055] In one embodiment, the connecting part 72 is provided with a hollow hole 721, which extends from the fixing part 71 toward the head 73.

[0056] In this embodiment, by providing a perforated hole 721 extending from the fixing part 71 towards the head 73 on the connecting part 72, the stress distribution of the exhaust valve plate can be further optimized, and the reliability of the exhaust valve plate can be improved. The stress distribution of the exhaust valve plate in this embodiment is as follows: Figure 9 As shown.

[0057] In one embodiment, a plane passing through the center line of the mounting hole 74 and the center line of the head 73 is designated as the first plane. At least two rows of perforated holes 721 are provided, distributed on both sides of the first plane. By providing perforated holes 721 on both sides of the first plane, the structure of the connecting portions 72 on both sides of the first plane can be adjusted simultaneously, optimizing the force on the exhaust valve plate throughout the connecting portion 72, thereby making the design of the exhaust valve plate more in line with expectations.

[0058] In one embodiment, at least two rows of perforated holes 721 are symmetrical about the first plane, which makes the structure of the connecting part 72 on both sides of the first plane symmetrical about the first plane, thereby making the structural adjustment of the connecting part 72 for the exhaust valve plate more balanced and the stress distribution of the exhaust valve plate more optimized.

[0059] In one embodiment, along the direction from the fixing part 71 to the head 73, the spacing between at least two rows of perforated holes 721 located on both sides of the first plane increases.

[0060] In one embodiment, the extending direction of the perforated hole 721 is the same as the side extending direction of the connecting portion 72 on the side where the perforated hole 721 is located. This allows the structural design of the perforated hole 721 to be adapted to the structure of the connecting portion 72, thereby optimizing the structure of the connecting portion 72 and improving the stress distribution of the exhaust valve plate.

[0061] In one embodiment, each row of perforated holes 721 includes an elongated perforated hole 721, which simplifies the structure and allows for effective adjustment of the structure of the connecting part 72, thereby improving the stress distribution of the exhaust valve plate.

[0062] In one embodiment, each column of perforated holes 721 includes at least two elongated perforated holes 721, and the arrangement direction of the perforated holes 721 in the same column is consistent with the length extension direction of the perforated holes 721. In this embodiment, each column of perforated holes 721 includes at least two elongated perforated holes 721, and adjacent perforated holes 721 are arranged at intervals. This can improve the stress distribution of the exhaust valve plate while ensuring the structural strength of the connecting part 72, so that the structural strength and stress distribution of the exhaust valve plate can both achieve the expected results, effectively optimizing the structure of the exhaust valve plate.

[0063] In one embodiment, the thickness of the fixing part 71, the connecting part 72, and the head 73 of the exhaust valve plate are all the same.

[0064] In one embodiment, the width of the fixing part 71 and the diameter of the head 73 are both greater than the width of the connecting part 72.

[0065] According to an embodiment of the present invention, the pump body assembly includes an exhaust valve plate 7, which is the exhaust valve plate described above.

[0066] The pump body assembly also includes an upper flange 1, a cylinder 2, a crankshaft 3, a roller 4, a lower flange 5, and a sliding vane 6. The components work together to form a sealed intake chamber 21 and an exhaust chamber 22. Under the rotational drive of the crankshaft 3, the volume of the compressor's intake chamber 21 and exhaust chamber 22 changes, thereby realizing the compressor's periodic intake, compression, and exhaust process.

[0067] The flange vent 11 is opened on the upper flange 1. The vent valve plate 7 and the limiter 8 are both provided with mounting holes. Rivets 9 are provided in the mounting holes. The rivets 9 fix the vent valve plate 7 and the limiter 8 together to the upper flange 1.

[0068] According to an embodiment of the present invention, the compressor includes the exhaust valve plate described above or the pump body assembly described above. The compressor is a single-cylinder compressor or a multi-cylinder compressor.

[0069] According to an embodiment of the present invention, the air conditioner includes a compressor, which is the compressor described above.

[0070] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An exhaust valve plate, characterized in that, The compressor includes a fixing part (71), a connecting part (72), and a head (73). The fixing part (71) is provided with a mounting hole (74). The fixing part (71) is configured to assemble and fix the exhaust valve plate. The connecting part (72) connects the fixing part (71) and the head (73). The head (73) is configured to cover the flange exhaust port (11). The flange exhaust port (11) is opened on the upper flange (1) of the pump body assembly of the compressor. The connecting part (72) The first-order structural modal frequency of the exhaust valve plate is f1, the second-order structural modal frequency is f2, the maximum operating frequency of the compressor is f, and the parameters f1, f2, and f satisfy: f1 > 2f, f2 > 10f; the maximum operating frequency of the compressor is f ≥ 120Hz; the first-order structural modal frequency of the exhaust valve plate is f1 ∈ [240, 900], and the second-order structural modal frequency is f2 ∈ [1200, 2500].

2. The exhaust valve plate according to claim 1, characterized in that, The first-order structural modal frequency of the exhaust valve plate is f1∈[280,650], and the second-order structural modal frequency is f2∈[1400,2100].

3. The exhaust valve plate according to claim 1, characterized in that, 120Hz≤f≤200Hz.

4. The exhaust valve plate according to claim 3, characterized in that, 140Hz≤f≤180Hz.

5. The exhaust valve plate according to any one of claims 1 to 2, characterized in that, The width of the connecting portion (72) increases along the direction from the fixing portion (71) to the head (73).

6. The exhaust valve plate according to any one of claims 1 to 2, characterized in that, The sidewall of the connecting part (72) is tangent to the sidewall of the head (73) at the connection position.

7. The exhaust valve plate according to any one of claims 1 to 2, characterized in that, The connecting part (72) is provided with a hollow hole (721), which extends from the fixing part (71) toward the head (73).

8. The exhaust valve plate according to claim 7, characterized in that, The first plane is a plane passing through the center line of the mounting hole (74) and the center line of the head (73). The hollow holes (721) are at least two rows, and at least two rows of hollow holes (721) are distributed on both sides of the first plane.

9. The exhaust valve plate according to claim 8, characterized in that, At least two columns of the perforated holes (721) are symmetrical about the first plane; and / or, along the direction from the fixing part (71) to the head (73), the spacing between at least two columns of the perforated holes (721) located on both sides of the first plane increases.

10. The exhaust valve plate according to claim 8, characterized in that, Each column of the perforated holes (721) includes one elongated perforated hole (721); or, each column of the perforated holes (721) includes at least two elongated perforated holes (721), and the arrangement direction of the perforated holes (721) in the same column is consistent with the length extension direction of the perforated holes (721).

11. A pump body assembly, including an exhaust valve plate (7), characterized in that, The exhaust valve plate (7) is the exhaust valve plate according to any one of claims 1 to 10.

12. A compressor, characterized in that, Includes the exhaust valve plate according to any one of claims 1 to 10 or the pump body assembly according to claim 11.

13. An air conditioner, comprising a compressor, characterized in that, The compressor is the compressor described in claim 12.

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