Exhaust structure, compressor and refrigeration equipment

Abstract

The invention discloses an exhaust structure, a compressor and refrigeration equipment. The exhaust structure comprises a valve seat, a first valve plate, a lift limiter and a second valve plate. One end of the first valve plate is fixedly connected with the valve seat, and the other end can move close to or away from the valve seat to close or open the exhaust port; the lift limiter is installed on the valve seat and located on the side, away from the exhaust port, of the first valve block. The second valve plate is arranged between the first valve plate and the lift limiter, one end of the second valve plate is fixed, and the other end of the second valve plate freely extends and can move towards the lift limiter under the action of the first valve plate; and when the first valve plate seals the exhaust port, the free end of the second valve plate is separately arranged with the first valve plate and the lift limiter at intervals. According to the technical scheme, the noise of the exhaust valve plate during high-frequency operation and low-frequency operation of the compressor can be effectively reduced at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to an exhaust structure, a compression component and a refrigeration device. Background Art

[0002] In the related art, an exhaust valve plate is provided at the exhaust port of the compressor, one end of the exhaust valve plate is fixed to the exhaust valve seat, and the other end can move relative to the exhaust valve seat to open or close the exhaust port. A lift limiter is provided on the side of the exhaust valve plate away from the exhaust valve seat to limit the opening range of the exhaust valve plate and prevent the exhaust valve plate from being excessively deformed and damaged.

[0003] However, when the compressor operates at high frequency, the exhaust valve plate is prone to collide with the lift limiter to produce noise. In order to improve the noise during high-frequency operation, the stiffness of the exhaust valve plate is usually increased. However, after the stiffness of the exhaust valve plate is increased, it is easy to cause the noise between the exhaust valve plate and the exhaust valve seat to deteriorate when the compressor operates at low frequency. Summary of the invention

[0004] The main purpose of the present invention is to provide an exhaust structure, which is intended to improve the exhaust valve noise when the compressor is running at both high frequency and low frequency.

[0005] To achieve the above object, the exhaust structure proposed by the present invention includes:

[0006] A valve seat, wherein the valve seat is provided with an exhaust port;

[0007] A first valve plate, one end of which is fixedly connected to the valve seat, and the other end of which can move toward or away from the valve seat to close or open the exhaust port;

[0008] a lift limiter, mounted on the valve seat and located on a side of the first valve plate away from the exhaust port; and

[0009] The second valve plate is arranged between the first valve plate and the lift limiter, one end of the second valve plate is fixed, and the other end of the second valve plate extends freely and can move toward the lift limiter under the action of the first valve plate; when the first valve plate closes the exhaust port, the free end of the second valve plate is spaced apart from the first valve plate and the lift limiter respectively.

[0010] In one embodiment, the fixed end of the second valve plate is fixedly connected to the lift limiter.

[0011] In one embodiment, the lift limiter comprises a connecting section and an upwardly tilted section, wherein the connecting section is fixedly connected to the valve seat, the upwardly tilted section tilts away from the valve seat, and the upwardly tilted section is spaced apart from the first valve plate;

[0012] The fixed end of the second valve sheet is connected to the connecting section and / or the upwardly curved section, and the free end of the second valve sheet is located between the upwardly curved section and the first valve sheet.

[0013] In one embodiment, the fixed end of the second valve sheet is fixedly connected to the position of the upward section close to the connecting section, and the free end of the second valve sheet extends in a direction away from the connecting section;

[0014] It is defined that when the first valve sheet closes the exhaust port, the minimum distance between the free end of the second valve sheet and the first valve sheet is D1, which satisfies 0.2 mm ≤ D1 ≤ 1 mm.

[0015] In one embodiment, when the first valve sheet closes the exhaust port, the free end of the second valve sheet is arranged parallel to the first valve sheet.

[0016] In one embodiment, the fixed end of the second valve sheet is fixedly connected to a position of the upward section away from the connecting section, and the free end of the second valve sheet extends toward a direction close to the connecting section;

[0017] It is defined that when the first valve sheet closes the exhaust port, a minimum distance D1' between the free end of the second valve sheet and the first valve sheet satisfies 0.05 mm ≤ D1' ≤ 0.5 mm.

[0018] In one embodiment, when the first valve sheet closes the exhaust port, the free end of the second valve sheet extends obliquely toward the first valve sheet.

[0019] In one embodiment, the stiffness of the first valve plate is defined as K1, and the stiffness of the second valve plate is defined as K2, satisfying 0.5K1 <K2<4K1。

[0020] In one embodiment, a mounting groove is provided on a side of the lift limiter facing the first valve plate, and a fixed end of the second valve plate is mounted in the mounting groove;

[0021] When the first valve piece is opened to the maximum position, the second valve piece is accommodated in the installation groove.

[0022] In one embodiment, the thickness dimension of the second valve plate is defined as H2, and the depth of the mounting groove in the thickness direction of the lift limiter is defined as H1, which satisfies -0.1 mm. <H2-H1<0.1mm;

[0023] And / or, define the length dimension of the second valve plate as L2, the length dimension of the installation groove as L1, and satisfy -2mm <L2-L1<2mm。

[0024] In one embodiment, the mounting groove is provided on the upward section of the lift limiter, the upward section extends in an arc shape, and the mounting groove is an arc-shaped groove and is extended along the length direction of the upward section.

[0025] In one embodiment, the area where the lift limiter is connected to the fixed end of the second valve plate is defined as the first area, and the length dimension of the first area is L3, which satisfies 3 mm. <L3<8mm。

[0026] In one embodiment, the second valve plate is a flat plate structure or an arc-shaped plate structure.

[0027] To achieve the above object, the present invention further provides a compressor, comprising the above exhaust structure. The exhaust structure comprises:

[0028] A valve seat, wherein the valve seat is provided with an exhaust port;

[0029] A first valve plate, one end of which is fixedly connected to the valve seat, and the other end of which can move toward or away from the valve seat to close or open the exhaust port;

[0030] a lift limiter, mounted on the valve seat and located on a side of the first valve plate away from the exhaust port; and

[0031] The second valve plate is arranged between the first valve plate and the lift limiter, one end of the second valve plate is fixed, and the other end of the second valve plate extends freely and can move toward the lift limiter under the action of the first valve plate; when the first valve plate closes the exhaust port, the free end of the second valve plate is spaced apart from the first valve plate and the lift limiter respectively.

[0032] To achieve the above object, the present invention also provides a refrigeration device, including the above compressor.

[0033] In the exhaust structure of the technical solution of the present invention, one end of the first valve plate is fixedly connected to the valve seat, and the other end can be close to or away from the valve seat to close or open the exhaust port, thereby realizing the exhaust function of the compressor. A lift limiter is provided on the side of the first valve plate away from the exhaust port to limit the opening of the first valve plate. By arranging a second valve plate between the first valve plate and the lift limiter, one end of the second valve plate is fixed, and the other end is freely extended and can move toward the lift limiter under the action of the first valve plate. When the first valve plate closes the exhaust port, the free end of the second valve plate is spaced from the first valve plate and the lift limiter, respectively, so that the first valve plate will not contact the second valve plate at the initial opening, which can effectively improve the opening and closing noise between the first valve plate and the valve seat when the compressor is running at a low frequency; when the first valve plate is opened to a certain opening, it contacts the second valve plate, which increases the overall rigidity of the exhaust valve plate, and can effectively improve the impact noise between the exhaust valve plate and the lift limiter when the compressor is running at a high frequency. In this way, the exhaust structure of this embodiment can effectively improve the exhaust valve plate noise during high-frequency operation and low-frequency operation of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0035] Figure 1 It is a structural schematic diagram of an embodiment of an exhaust structure of the present invention;

[0036] Figure 2 for Figure 1 A partial enlarged view of the M in the middle;

[0037] Figure 3 for Figure 1 A schematic structural diagram of a lift limiter in an embodiment;

[0038] Figure 4 for Figure 3 A flattened view of the lift limiter in the embodiment;

[0039] Figure 5 It is a structural schematic diagram of an embodiment of a second valve plate in the present invention;

[0040] Figure 6 It is a structural schematic diagram of another embodiment of the exhaust structure of the present invention;

[0041] Figure 7 for Figure 6 A local enlarged view of the N position in the middle;

[0042] Figure 8This is a comparison chart of noise improvement / deterioration between a compressor having the exhaust structure of this embodiment and a conventional compressor having only one exhaust valve plate under an operating frequency of 160 Hz.

[0043] Description of Figure Numbers:

[0044] Label name Label name 100 Valve Seat 320 Upward segment 101 Exhaust port 301 Mounting slot 200 First valve plate 400 Second valve plate 300 Lift limiter 410 Fixed end 310 Connection segment 420 Free end 300a First Area

[0045] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0049] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0050] The present invention proposes an exhaust structure which is applied to a compressor and aims to improve the exhaust valve noise when the compressor is running at both high frequency and low frequency.

[0051] In the embodiment of the present invention, Figure 1 and Figure 2 as well as Figure 6 and Figure 7 As shown, the exhaust structure includes a valve seat 100, a first valve plate 200, a lift limiter 300 and a second valve plate 400;

[0052] The valve seat 100 is provided with an exhaust port 101;

[0053] One end of the first valve plate 200 is fixedly connected to the valve seat 100, and the other end can move closer to or away from the valve seat 100 to close or open the exhaust port 101;

[0054] The lift limiter 300 is mounted on the valve seat 100 and is located on a side of the first valve plate 200 away from the exhaust port 101;

[0055] The second valve plate 400 is arranged between the first valve plate 200 and the lift limiter 300. One end of the second valve plate 400 is fixed, and the other end extends freely and can move toward the lift limiter 300 under the action of the first valve plate 200; when the first valve plate 200 closes the exhaust port 101, the free end of the second valve plate 400 is spaced apart from the first valve plate 200 and the lift limiter 300 respectively.

[0056] The exhaust structure in this embodiment is applied in a compressor, the valve seat 100 is provided with an exhaust port 101, and a first valve plate 200 is provided on the valve seat 100, one end of the first valve plate 200 is fixedly connected to the valve seat 100, and the other end can move relative to the valve seat 100 to open or close the exhaust port 101. During the operation of the compressor, the compressed high-temperature and high-pressure gas can flush the first valve plate 200 that closes the exhaust port 101 to achieve the exhaust function. When the compressor exhaust ends, the first valve plate 200 moves toward the valve seat 100 to close the exhaust port 101 to prevent external air from entering the compression cylinder and ensure the sealing effect. A lift limiter 300 is provided on the side of the first valve plate 200 away from the exhaust port 101, and the lift limiter 300 is used to limit the opening range of the first valve plate 200 to prevent the first valve plate 200 from being deformed too much due to the impact of gas. In actual application, the compressor can be operated at high frequency or low frequency according to actual needs. In order to effectively reduce the impact noise between the first valve plate 200 and the lift limiter 300 under the high-frequency operation condition of the compressor, the stiffness of the first valve plate 200 is increased (such as increasing the thickness of the first valve plate 200). However, after increasing the stiffness of the first valve plate 200, the exhaust gas will not easily break through the first valve plate 200 when the compressor is under the low-frequency operation condition, causing the opening and closing noise between the first valve plate 200 and the valve seat 100 to worsen. Based on this, in this embodiment, a second valve plate 400 is arranged between the first valve plate 200 and the lift limiter 300, and one end of the second valve plate 400 is fixed, and the other end is freely extended and can move toward the lift limiter 300 under the action of the first valve plate 200, and when the first valve plate 200 closes the exhaust port 1 01, the free end 420 of the second valve disc 400 is spaced apart from the first valve disc 200 and the lift limiter 300, respectively, so that the first valve disc 200 will not contact the second valve disc 400 at the initial opening stage, that is, it will not be affected by the second valve disc 400. Therefore, when the compressor is running at a low frequency, the first valve disc 200 is easily flushed open by the exhaust gas, thereby effectively improving the noise between the first valve disc 200 and the valve seat 100; when the first valve disc 200 moves to a certain opening, it will contact the second valve disc 400. At this time, the stiffness of the exhaust valve disc is the sum of the stiffness of the first valve disc 200 and the stiffness of the second valve disc 400. Therefore, when the compressor is running at a high frequency, the first valve disc 200 and the second valve disc 400 will not be so easily flushed to collide with the lift limiter 300 and generate noise, that is, the noise of the exhaust valve disc when the compressor is running at a high frequency can be effectively improved.

[0057] Therefore, the exhaust structure in this embodiment can effectively reduce the noise between the exhaust valve plate and the lift limiter 300 in the high-frequency operation of the compressor, and can also improve the noise between the exhaust valve plate and the valve seat 100 in the low-frequency operation of the compressor without changing the rigidity of the first valve plate 200 itself:

[0058] When the compressor operates at a low frequency, since the second valve plate 400 does not contact the first valve plate 200 , the exhaust gas can easily push open the first valve plate 200 , thereby effectively improving the opening and closing noise between the first valve plate 200 and the valve seat 100 .

[0059] When the compressor runs at high frequency, the first valve plate 200 is pushed open by the exhaust gas until it contacts the second valve plate 400. At this time, the second valve plate 400 acts as a buffer for the first valve plate 200, which can reduce the impact strength of the first valve plate 200 on the lift limiter 300, thereby effectively improving the impact noise between the exhaust valve plate and the lift limiter 300.

[0060] In actual application, one end of the second valve disc 400 is fixed, and the other end is freely extended. It can be understood that when the first valve disc 200 is opened by the exhaust to contact the second valve disc 400, the first valve disc 200 can push the free end of the second valve disc 400 to move toward the lift limiter 300. At this time, the second valve disc 400 plays a role in enhancing the rigidity of the first valve disc 200, which is equivalent to buffering the movement of the first valve disc 200 toward the lift limiter 300, reducing the impact strength of the first valve disc 200 on the lift limiter 300, and achieving the effect of noise reduction. In order to ensure that the second valve disc 400 has a good buffering effect on the first valve disc 200, the second valve disc 400 can adopt a spring structure, and its free end can swing under the action of the first valve disc 200, and at the same time, the free end of the second valve disc 400 can return to its original position after the exhaust is completed.

[0061] The fixed end 410 of the second valve disc 400 can be fixedly connected according to actual conditions, such as being fixedly connected to the lift limiter 300, or being fixedly connected to the valve seat 100, or being fixedly connected to the fixed part of the first valve disc 200. The specific fixing method is not limited here, such as being welded, bonded or clamped, etc. The free end 420 of the second valve disc 400 extends from the fixed end 410 to between the first valve disc 200 and the lift limiter 300. It can be understood that the free end 420 of the second valve disc 400 is suspended between the first valve disc 200 and the lift limiter 300, so that when the first valve disc 200 is in the closed exhaust port 101, the second valve disc 400 is spaced from the first valve disc 200 and the lift limiter 300. Then, the second valve disc 400 will only contact and act with the first valve disc 200 when the first valve disc 200 is opened to a certain degree.

[0062] In practical applications, the shape and structure of the second valve plate 400 may be determined according to actual conditions, such as a flat plate structure, an arc plate structure, or a structure composed of multiple arc plates / straight plates, etc. The specific structure is not limited here.

[0063] In actual application, please refer to Figure 8Through the noise improvement / deterioration comparison diagram of the compressor with the exhaust structure of this embodiment and the conventional compressor with only one exhaust valve plate under the operating frequency of 160Hz under the same conditions (such as the same compressor specifications, the same compression frequency and the same motor power), it can be seen that the exhaust structure of this embodiment can effectively improve the exhaust valve plate noise.

[0064] In the exhaust structure of the technical solution of the present invention, one end of the first valve plate 200 is fixedly connected to the valve seat 100, and the other end can be close to or away from the valve seat 100 to close or open the exhaust port 101, thereby realizing the exhaust function of the compressor. A lift limiter 300 is provided on the side of the first valve disc 200 away from the exhaust port 101 to limit the opening of the first valve disc 200. A second valve disc 400 is provided between the first valve disc 200 and the lift limiter 300. One end of the second valve disc 400 is fixed, and the other end is freely extended and can move toward the lift limiter 300 under the action of the first valve disc 200. When the first valve disc 200 closes the exhaust port 101, the free end 420 of the second valve disc 400 is spaced from the first valve disc 200 and the lift limiter 300, respectively, so that the first valve disc 200 will not contact the second valve disc 400 at the initial opening stage, which can effectively improve the opening and closing noise between the first valve disc 200 and the valve seat 100 when the compressor is running at a low frequency; when the first valve disc 200 is opened to a certain opening, it contacts the second valve disc 400, which increases the overall rigidity of the exhaust valve disc, and can effectively improve the impact noise between the exhaust valve disc and the lift limiter 300 when the compressor is running at a high frequency. In this way, the exhaust structure of this embodiment can effectively improve the exhaust valve noise when the compressor is running at both high frequency and low frequency.

[0065] In one embodiment of the present invention, please refer to Figure 1 and Figure 6 The fixed end 410 of the second valve plate 400 is fixedly connected to the lift limiter 300 .

[0066] It can be understood that the second valve disc 400 is located between the first valve disc 200 and the lift limiter 300. In this embodiment, by fixing the fixed end 410 of the second valve disc 400 to the lift limiter 300, compared with the method of fixing the second valve disc 400 to the valve seat 100, the structural layout can be simplified without the need to additionally design the structure of the second valve disc 400 to extend from the valve seat 100 to the position between the first valve disc 200 and the lift limiter 300; compared with the method of fixing the second valve disc 200, the second valve disc 400 will not affect the stiffness of the first valve disc 200 at the initial opening stage.

[0067] As an example, the second valve plate 400 and the lift limiter 300 may be fixedly connected by welding or bonding.

[0068] In one embodiment of the present invention, please refer to Figure 1and Figure 6 The lift limiter 300 includes a connecting section 310 and an upturned section 320. The connecting section 310 is fixedly connected to the valve seat 100, and the upturned section 320 is upturned in a direction away from the valve seat 100. The upturned section 320 is spaced apart from the first valve plate 200. The fixed end 410 of the second valve plate 400 is connected to the connecting section 310 and / or the upturned section 320, and the free end 420 of the second valve plate 400 is located between the upturned section 320 and the first valve plate 200.

[0069] In this embodiment, the lift limiter 300 is a plate-like structure, including a connecting section 310 and an upward section 320, wherein the connecting section 310 plays a fixing role, and the upward section 320 plays a role in limiting the opening of the first valve disc 200. The connecting section 310 is fixedly connected to the valve seat 100 by rivets, and at this time, one end of the first valve disc 200 is clamped and fixed by the connecting section 310 and the valve seat 100, thereby ensuring the connection reliability of the lift limiter 300, the first valve disc 200 and the valve seat 100. The upward section 320 is tilted in a direction away from the valve seat 100, and the upward section 320 is spaced apart from the first valve disc 200, so that sufficient space is formed between the upward section 320 and the valve seat 100 for the first valve disc 200 and the second valve disc 400 to move. It can be understood that in the height direction of the exhaust structure, the upturned portion 320 extends upward in an arc shape, so that the surface of the lift limiter 300 facing the first valve plate 200 is an arc surface, so that it can be more adapted to the shape of the first valve plate 200 after being deformed by the compressed gas, thereby reducing the impact wear between the two, and at the same time allowing the airflow that hits the first valve plate 200 to be discharged along the wall of the first valve plate 200, reducing the generation of vortices.

[0070] The fixed end 410 of the second valve disc 400 may be fixedly connected to the connecting section 310 and / or the upturned section 320. It can be understood that the fixed end 410 of the second valve disc 400 may be fixedly connected only to the connecting section 310, or may be fixedly connected only to the upturned section 320, or may be fixedly connected to both the connecting section 310 and the upturned section 320. The specific connection position of the fixed end 410 may be determined according to actual conditions and is not limited here, as long as the fixed end 410 can be reliably fixed.

[0071] Based on the fact that the upward section 320 mentioned above serves to limit the opening of the first valve disc 200, the area of ​​the first valve disc 200 that covers the exhaust port 101 actually interacts with the upward section 320. Therefore, the free end 420 of the second valve disc 400 is arranged between the upward section 320 and the first valve disc 200, so that the first valve disc 200 can smoothly contact the free end 420 of the second valve disc 400 during the process of being opened by the compressed gas, so that the first valve disc 200 can be effectively buffered by the second valve disc 400, thereby reducing the impact strength on the upward section 320.

[0072] It should be noted that the free end 420 of the second valve disc 400 can be understood as the area other than the fixed end 410 of the second valve disc 400, and the free end 420 thereof is equivalent to the cantilever member between the first valve disc 200 and the upward section 320, as long as it can be ensured that the first valve disc 200 can contact the free end 420 of the second valve disc 400 on the path where the first valve disc 200 is driven by the compressed gas to move toward the upward section 320. In practical applications, along the length direction of the first valve disc 200, the free end 420 of the second valve disc 400 can partially or completely overlap with the area of ​​the first valve disc 200 covering the exhaust port 101. As an example, the free end 420 of the second valve plate 400 completely covers the area of ​​the first valve plate 200 covering the exhaust port 101, so that the contact area between the first valve plate 200 and the second valve plate 400 is larger during the upward movement, thereby making the resistance force of the second valve plate 400 on the first valve plate 200 more balanced, preventing the second valve plate 200 from breaking or deforming due to instantaneous pressure imbalance.

[0073] As an example, in the height direction of the exhaust structure, the lower surface shape of the second valve plate 400 is adapted to the upper surface shape of the first valve plate 200, so that when the first valve plate 200 is impacted by the compressed gas and moves toward the upward section 320, the upper surface of the first valve plate 200 can fit with the lower surface of the second valve plate 400, and the second valve plate 400 can offset a part of the impact force exerted on the first valve plate 200, thereby making the movement process of the first valve plate 200 more stable and reliable.

[0074] In one embodiment of the present invention, please refer to Figures 1 to 5 The fixed end 410 of the second valve plate 400 is fixedly connected to the upward section 320 near the connecting section 310, and the free end 420 of the second valve plate 400 extends in a direction away from the connecting section 310; when the first valve plate 200 closes the exhaust port 101, the minimum distance between the free end 420 of the second valve plate 400 and the first valve plate 200 is defined as D1, satisfying 0.2mm≤D1≤1mm.

[0075] In this embodiment, the fixed end 410 of the second valve plate 400 is fixedly connected to the upward section 320 near the connecting section 310. At this time, the free end 420 of the second valve plate 400 is extended in a direction away from the connecting section 310, so that the free end 420 is between the first valve plate 200 and the upward section 320, that is, the free end 420 extends in the direction of the opening formed by the first valve plate 200 and the lift limiter 300.

[0076] In actual application, when the first valve disc 200 closes the exhaust port 101, the minimum distance D1 between the free end 420 of the second valve disc 400 and the first valve disc 200 cannot be too small or too large. When D1 is too small, the first valve disc 200 may contact the second valve disc 400 and be subjected to the force of the second valve disc 400 at the initial opening stage. At this time, the overall stiffness of the exhaust valve disc increases, resulting in the compressed gas not being easy to open the first valve disc 200 when the compressor is running at a low frequency, which may cause the first valve disc 200 and the valve seat 100 to generate an opening and closing noise; when D1 is too large, the first valve disc 200 contacts the second valve disc 400 when it is about to contact the lift limiter 300, and may not be subjected to sufficient reverse force from the second valve disc 400, and the first valve disc 200 drives the second valve disc 400 to collide with the lift limiter 300, causing impact noise. Based on this, this embodiment can improve the noise between the first valve plate 200 and the valve seat 100, and reduce the noise between the first valve plate 200 and the lift limiter 300 by setting D1 to satisfy 0.2mm≤D1≤1mm, thereby achieving the goal of reducing the exhaust valve plate noise during low-frequency operation and high-frequency operation of the compressor.

[0077] As an example, the minimum distance D1 between the free end 420 of the second valve sheet 400 and the first valve sheet 200 can be determined according to actual conditions, such as 0.2mm, 0.23mm, 0.25mm, 0.27mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.48mm, 0.5mm, 0.55mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm, etc.

[0078] Optionally, based on the embodiment in which the fixed end 410 of the second valve disc 400 and the upward section 320 are fixed at positions close to the connecting section 310, when the first valve disc 200 closes the exhaust port 101, the free end 420 of the second valve disc 400 is arranged parallel to the first valve disc 200. In this arrangement, when the first valve disc 200 moves toward the upward section 320, it contacts the free end 420 of the second valve disc 400, and then pushes the free end 420 of the second valve disc 400 to gradually bend to the same bending shape as the first valve disc 200. In this process, the holding force of the second valve disc 400 on the first valve disc 200 gradually increases, which can further enhance the buffering effect of the second valve disc 400 on the first valve disc 200.

[0079] In one embodiment of the present invention, please refer to Figure 6 to Figure 7The fixed end 410 of the second valve plate 400 is fixedly connected to the upward section 320 at a position away from the connecting section 310, and the free end of the second valve plate 400 extends in a direction close to the connecting section 310; when the first valve plate 200 closes the exhaust port 101, the minimum distance D1' between the free end 420 of the second valve plate 400 and the first valve plate 200 satisfies 0.05mm≤D1'≤0.5mm.

[0080] In this embodiment, the fixed end 410 of the second valve plate 400 is fixedly connected to the upward section 320 at a position away from the connecting section 310. At this time, the free end 420 of the second valve plate 400 is extended in the direction of the connecting section 310, so that the free end 420 is between the first valve plate 200 and the upward section 320, that is, the free end 420 extends in the direction where the first valve plate 200 is connected to the lift limiter 300.

[0081] In actual application, when the first valve disc 200 closes the exhaust port 101, the minimum distance D1' between the free end 420 of the second valve disc 400 and the first valve disc 200 cannot be too small or too large. When D1' is too small, the first valve disc 200 may contact the second valve disc 400 and be subjected to the force of the second valve disc 400 at the initial opening stage. At this time, the overall stiffness of the exhaust valve disc increases, resulting in the compressed gas not being easy to open the first valve disc 200 when the compressor is running at a low frequency, which may cause the first valve disc 200 and the valve seat 100 to generate an opening and closing noise; when D1' is too large, the first valve disc 200 contacts the second valve disc 400 when it is about to contact the lift limiter 300, and may not be subjected to sufficient reverse force from the second valve disc 400, and the first valve disc 200 drives the second valve disc 400 to collide with the lift limiter 300, causing impact noise. Based on this, this embodiment can improve the noise between the first valve plate 200 and the valve seat 100, and reduce the noise between the first valve plate 200 and the lift limiter 300 by setting D1' to satisfy 0.05mm≤D1'≤0.5mm, thereby achieving the goal of reducing the exhaust valve plate noise during low-frequency operation and high-frequency operation of the compressor.

[0082] As an example, the minimum distance D1' between the free end 420 of the second valve plate 400 and the first valve plate 200 can be determined according to actual conditions, such as 0.05mm, 0.07mm, 0.08mm, 0.1mm, 0.13mm, 0.15mm, 0.2mm, 0.25mm, 0.28mm, 0.3mm, 0.33mm, 0.35mm, 0.38mm, 0.4mm, 0.45mm or 0.5mm, etc.

[0083] Optionally, on the basis of the embodiment in which the fixed end 410 of the second valve plate 400 is fixed to the position where the upturned section 320 is far from the connecting section 310, when the first valve plate 200 closes the exhaust port 101, the free end 420 of the second valve plate 400 extends obliquely towards the first valve plate 200. With such a setting, when the first valve plate 200 moves towards the upturned section 320, the part of the first valve plate 200 far from its own free end first contacts the free end 420 of the second valve plate 400, and then pushes the free end 420 of the second valve plate 400 to be gradually bent until it is consistent with the bending shape of the first valve plate 200. During this process, the holding force of the second valve plate 400 on the first valve plate 200 gradually increases, which can further improve the buffering effect of the second valve plate 400 on the first valve plate 200.

[0084] In an embodiment of the present invention, please refer to Figures 1 to 7 , define the stiffness of the first valve plate 200 as K1, and the stiffness of the second valve plate 400 as K2, satisfying 0.5K1 < K2 < 4K1.

[0085] In practical applications, the stiffness K2 of the second valve plate 400 cannot be too small or too large. When the stiffness K2 of the second valve plate 400 is too small, during the process of the first valve plate 200 being driven by compressed gas to move towards the lift limiter 300, the second valve plate 400 cannot play a buffering role on the first valve plate 200, and the second valve plate 400 is easily pushed by the first valve plate 200 to hit the lift limiter 300, resulting in impact noise; when the stiffness K2 of the second valve plate 400 is too large, when the first valve plate 200 is driven by compressed gas to move into contact with the second valve plate 400, the second valve plate 400 will generate too large a holding force on the first valve plate 200 and cannot further open the first valve plate 200, thus affecting the exhaust efficiency of the compressor. Based on this, in this embodiment, the stiffness K2 of the second valve plate 400 is set to be 0.5 times to 4 times the stiffness K1 of the first valve plate 200, that is, satisfying 0.5K1 < K2 < 4K1. With such a setting, the second valve plate 400 can not only play a buffering role on the first valve plate 200, but also be pushed by the first valve plate 200 to the lift limiter 300 to ensure the exhaust efficiency.

[0086] It can be understood that stiffness refers to the ability of a structure to resist elastic deformation (bending, stretching, compression, etc.) when受力. The calculation formula of stiffness K is K = F / X, where F is the force acting on the structure and X is the deformation generated under the action of the F force. The unit of stiffness K is Newton per meter (N / m).

[0087] Taking the first valve plate 200 and the second valve plate 400 in this application as examples, the same acting force F can be applied to the first valve plate 200 and the second valve plate 400, and the stiffness relationship between the first valve plate 200 and the second valve plate 400 can be characterized by the deformation amounts generated by the first valve plate 200 and the second valve plate 400. In this embodiment, 0.5K1 < K2 < 4K1, which can be understood as that when the first valve plate 200 and the second valve plate 400 are subjected to the same acting force F, the deformation amount of the first valve plate 200 is 0.5 times to 4 times that of the second valve plate 400; or when the first valve plate 200 and the second valve plate 400 are deformed by the same amount under force, the force received by the second valve plate 400 is 0.5 times to 4 times that of the first valve plate 200.

[0088] Exemplarily, the structure of the second valve plate 400 can be the same as that of the first valve plate 200, which can simplify the manufacturing and forming process and at the same time ensure the stiffness range of the second valve plate 400 and the first valve plate 200.

[0089] In an embodiment of the present invention, please refer to Figures 1 to 7 , an installation groove 301 is provided on one side of the lift limiter 300 facing the first valve plate 200, and the fixed end 410 of the second valve plate 400 is installed in the installation groove 301; when the first valve plate 200 is opened to the maximum position, the second valve plate 400 is accommodated in the installation groove 301.

[0090] This embodiment exemplifies the connection structure between the second valve plate 400 and the lift limiter 300. An installation groove 301 is provided on one side of the lift limiter 300 facing the first valve plate 200. The second valve plate 400 can be accommodated in the installation groove 301 when the first valve plate 200 is opened to the maximum position, so that the first valve plate 200 is in contact with the upwardly curved section 320 of the lift limiter 300, reducing the impact wear between the two.

[0091] Exemplarily, the installation groove 301 is an arc-shaped groove. The installation groove 301 is provided on the upwardly curved section 320 of the lift limiter 300. The upwardly curved section 320 is arc-shaped, and the radian of the bottom wall of the arc-shaped groove is the same as that of the upwardly curved section 320.

[0092] It can be understood that the fixed end 410 of the second valve plate 400 is fixed to one end of the installation groove 301, and the free end 420 extends from the installation groove 301 to the position between the lift limiter 300 and the first valve plate 200. Then, when the first valve plate 200 moves towards the upward deflection section 320, it will push the second valve plate 400 to deform and move towards the installation groove 301. At this time, the free end 420 of the second valve plate 400 deforms into an arc structure and is accommodated in the installation groove 301, and is consistent with the radian of the upward deflection section 320, so as to reduce the impact strength between the second valve plate 400 and the upward deflection section 320 and avoid the impact noise between the second valve plate 400 and the lift limiter 300. In addition, by accommodating the second valve plate 400 through the arc groove structure, the connection structure between the second valve plate 400 and the lift limiter 300 is made more reliable.

[0093] In an embodiment of the present invention, the thickness dimension of the second valve plate 400 is defined as H2, and the groove depth of the installation groove 301 in the thickness direction of the lift limiter 300 is H1, satisfying -0.1 mm < H2 - H1 < 0.1 mm.

[0094] In this embodiment, by limiting the relationship between the groove depth H1 of the installation groove 301 and the thickness dimension H2 of the second valve plate 400, when the first valve plate 200 is opened to the maximum position, the second valve plate 400 can be completely accommodated in the installation groove 301, and the first valve plate 200 can be attached to the upward deflection section 320 of the lift limiter 300. As an example, the groove depth H1 of the installation groove 301 and the thickness dimension H2 of the second valve plate 400 satisfy -0.1 mm < H2 - H1 < 0.1 mm, so that when the first valve plate 200 is opened to the maximum position, the first valve plate 200, the second valve plate 400, and the upward deflection section 320 can all be attached and arranged, further improving the noise reduction effect. Optionally, the groove depth H1 of the installation groove 301 is equal to the thickness dimension H2 of the second valve plate 400.

[0095] In an embodiment of the present invention, the length dimension of the second valve plate 400 is defined as L2, and the length dimension of the installation groove 301 is L1, satisfying -2 mm < L2 - L1 < 2 mm.

[0096] In this embodiment, by defining the relationship between the length dimension L1 of the installation groove 301 and the length dimension L2 of the second valve plate 400, the length dimension of the second valve plate 400 is made to be comparable to the length dimension of the installation groove 301. Thus, when the first valve plate 200 is opened to the maximum position, the second valve plate 400 can be completely accommodated in the installation groove 301, preventing the free end 420 of the second valve plate 400 from being unable to enter the installation groove 301 and being clamped between the first valve plate 200 and the upturned section 320, which would affect the cooperation between the first valve plate 200 and the upturned section 320, as well as the guiding effect of the first valve plate 200 on the compressed gas, resulting in an increase in eddy current and exhaust resistance and affecting the exhaust efficiency. Exemplarily, the length dimension L1 of the installation groove 301 and the length dimension L2 of the second valve plate 400 satisfy -2mm < L2 - L1 < 2mm. Thus, when the first valve plate 200 is opened to the maximum position, the first valve plate 200, the second valve plate 400, and the upturned section 320 can all cooperate better, ensuring the exhaust efficiency. Optionally, the length dimension L1 of the installation groove 301 is equal to the length dimension L2 of the second valve plate 400.

[0097] In an embodiment of the present invention, please refer to Figures 1 to 7 , and define the area where the lift limiter 300 is connected to the fixed end 410 of the second valve plate 400 as the first area 300a. The length dimension of the first area 300a is L3, satisfying 3mm < L3 < 8mm.

[0098] In this embodiment, by setting the length L3 of the area where the fixed end 410 of the second valve plate 400 is connected to the lift limiter 300 to satisfy 3mm < L3 < 8mm, the connection length between the second valve plate 400 and the lift limiter 300 is ensured, thereby ensuring the reliability of the connection structure between the second valve plate 400 and the lift limiter 300. Exemplarily, the fixed end 410 of the second valve plate 400 is a plane, and the first area 300a is also a plane. Through the cooperation of plane and plane, while simplifying the connection structure, the connection reliability can be further improved. Optionally, the fixed end 410 of the second valve plate 400 and the first area 300a are fixed by welding or bonding.

[0099] The present invention also proposes a compressor. The compressor includes an exhaust structure, and the specific structure of the exhaust structure refers to the above embodiment. Since this compressor adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the compressor can be a rotary compressor or a scroll compressor, etc.

[0100] The present invention further proposes a refrigeration device, which includes a compressor. The specific structure of the compressor refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. The refrigeration device can be an air conditioner, a refrigerator, or a cold chain vehicle.

[0101] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An exhaust structure, characterized in that: include: A valve seat, wherein the valve seat is provided with an exhaust port; A first valve plate, one end of which is fixedly connected to the valve seat, and the other end of which can move toward or away from the valve seat to close or open the exhaust port; A lift limiter is installed on the valve seat and is located on a side of the first valve plate away from the exhaust port; as well as The second valve plate is arranged between the first valve plate and the lift limiter, one end of the second valve plate is fixed, and the other end of the second valve plate extends freely and can move toward the lift limiter under the action of the first valve plate; when the first valve plate closes the exhaust port, the free end of the second valve plate is spaced apart from the first valve plate and the lift limiter respectively.

2. The exhaust structure according to claim 1, characterized in that: The fixed end of the second valve plate is fixedly connected to the lift limiter.

3. The exhaust structure according to claim 2, characterized in that: The lift limiter comprises a connecting section and an upward section, wherein the connecting section is fixedly connected to the valve seat, the upward section is tilted in a direction away from the valve seat, and the upward section is spaced apart from the first valve plate; The fixed end of the second valve sheet is connected to the connecting section and / or the upwardly curved section, and the free end of the second valve sheet is located between the upwardly curved section and the first valve sheet.

4. The exhaust structure according to claim 3, characterized in that: The fixed end of the second valve sheet is fixedly connected to the position of the upward section close to the connecting section, and the free end of the second valve sheet extends in a direction away from the connecting section; It is defined that when the first valve sheet closes the exhaust port, the minimum distance between the free end of the second valve sheet and the first valve sheet is D1, which satisfies 0.2 mm ≤ D1 ≤ 1 mm.

5. The exhaust structure according to claim 4, characterized in that: When the first valve sheet closes the exhaust port, the free end of the second valve sheet is arranged parallel to the first valve sheet.

6. The exhaust structure according to claim 3, characterized in that: The fixed end of the second valve sheet is fixedly connected to a position of the upward section away from the connecting section, and the free end of the second valve sheet extends toward a direction close to the connecting section; It is defined that when the first valve sheet closes the exhaust port, a minimum distance D1' between the free end of the second valve sheet and the first valve sheet satisfies 0.05 mm ≤ D1' ≤ 0.5 mm.

7. The exhaust structure according to claim 6, characterized in that: When the first valve sheet closes the exhaust port, the free end of the second valve sheet extends obliquely toward the first valve sheet.

8. The exhaust structure according to any one of claims 1 to 7, characterized in that: Define the stiffness of the first valve plate as K1, the stiffness of the second valve plate as K2, and satisfy 0.5K1 <K2<4K1。 9. The exhaust structure according to any one of claims 2 to 7, characterized in that: A mounting groove is provided on a side of the lift limiter facing the first valve plate, and a fixed end of the second valve plate is mounted in the mounting groove; When the first valve piece is opened to the maximum position, the second valve piece is accommodated in the installation groove.

10. The exhaust structure according to claim 9, characterized in that: Define the thickness dimension of the second valve plate as H2, define the depth of the mounting groove in the thickness direction of the lift limiter as H1, and satisfy -0.1mm <H2-H1<0.1mm; And / or, define the length dimension of the second valve plate as L2, the length dimension of the installation groove as L1, and satisfy -2mm <L2-L1<2mm。 11. The exhaust structure according to claim 9, characterized in that: The mounting groove is arranged on the upward section of the lift limiter, the upward section extends in an arc shape, and the mounting groove is an arc groove and is extended along the length direction of the upward section.

12. The exhaust structure according to any one of claims 2 to 7, characterized in that: The area where the lift limiter is connected to the fixed end of the second valve plate is defined as the first area, and the length dimension of the first area is L3, which satisfies 3 mm. <L3<8mm。 13. A compressor, characterized in that: Comprising the exhaust structure according to any one of claims 1 to 12.

14. A refrigeration device, characterized in that: Comprising the compressor of claim 13.

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