Exhaust check valve and compressor with same

Abstract

The exhaust check valve comprises a valve seat, a valve plate and a first force application component, an air inlet is formed in the first end of the valve seat, an air outlet is formed in the side face of the valve seat, the valve plate can be movably arranged in the valve seat, and the first force application component is arranged on the valve plate. The valve plate is provided with a conduction position enabling the air inlet and the air outlet to be communicated and a cut-off position enabling the air inlet and the air outlet not to be communicated, and in the process that the valve plate moves from the conduction position to the cut-off position, the first force application component is configured to apply force in the direction from the cut-off position to the conduction position to the valve plate. According to the exhaust check valve, after the exhaust check valve is installed at the air outlet of the static scroll plate and exhaust is finished, due to the fact that the first force application component is configured to apply the force opposite to the force in the return stroke process when the valve plate moves to the cut-off position from the connection position, the valve plate can be prevented from slapping a valve seat or a limiting stopper, and slapping noise is eliminated.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and particularly relates to an exhaust check valve and a compressor having the same. Background Art

[0002] A variable-frequency scroll compressor is composed of components such as a rotating crankshaft, a moving scroll plate, a stationary scroll plate, a support structure, a housing, and an electric motor. When the scroll compressor operates, the moving scroll plate orbits and translates around the center of the base circle of the stationary scroll plate profile. During this process, the multiple closed working volumes formed between the moving and stationary scroll plates gradually decrease. When the gas pressure in the central compression chamber reaches the exhaust threshold, the high-pressure refrigerant gas is discharged from the exhaust port of the stationary scroll plate. Generally, in order to avoid the reliability problems caused by the reverse flow of the mixture of refrigerant and oil in the housing cavity from the exhaust port to the compression chamber formed by the moving and stationary plates due to shutdown, resulting in compressor reverse rotation, an exhaust check valve needs to be provided at the exhaust port of the stationary scroll plate. For a scroll compressor with a large displacement and high rotational speed under variable working conditions, its gas flow pulsation is greater. Setting a conventional check valve assembly will bring new problems. For example, the valve plate slapping the valve seat or the limiter generates slapping noise, which will seriously affect the service life of the valve plate and reduce the product reliability. Another example is the flutter of the valve plate caused by gas pressure pulsation, forming a new noise source. Summary of the Invention

[0003] Therefore, the present invention provides an exhaust check valve, which can solve the technical problem of vibration noise caused by the exhaust valve plate slapping the valve seat or the limiter during the operation of the compressor.

[0004] To solve the above problems, the present invention provides an exhaust check valve, including a valve seat, a valve plate, and a first biasing member. An air inlet is formed at a first end of the valve seat, and an exhaust port is formed on a side surface of the valve seat. The valve plate is movably disposed in the valve seat. The valve plate has a conducting position for communicating the air inlet and the exhaust port and a cutoff position for disconnecting the air inlet and the exhaust port. During the process of the valve plate moving from the conducting position to the cutoff position, the first biasing member is configured to apply a force to the valve plate in the direction from the cutoff position to the conducting position.

[0005] In some embodiments, the valve plate has magnetism, the first biasing member includes a first annular magnetic member, the first annular magnetic member is fixed in the valve seat, and the first annular magnetic member is located between the air inlet and the exhaust port. The valve plate is located between the first annular magnetic member and a second end of the valve seat. The polarity of the side of the valve plate facing the first annular magnetic member is the same as the polarity of the side of the first annular magnetic member facing the valve plate.

[0006] In some embodiments, the first force-applying member includes a first elastic member, and one end of the first elastic member extends into the valve seat from the side where the air inlet is located and is connected to the valve plate.

[0007] In some embodiments, a vent is provided at the second end of the valve seat; and / or, two exhaust ports are provided on the side surface of the valve seat, and the two exhaust ports are oppositely arranged on the valve seat.

[0008] In some embodiments, a second force-applying member is further provided in the valve seat. The second force-applying member is located between the valve plate and the second end of the valve seat. During the process of the valve plate moving from the cut-off position to the conducting position, the second force-applying member is configured to apply a force to the valve plate in the direction from the conducting position to the cut-off position.

[0009] In some embodiments, the valve plate has magnetism, and the second force-applying member includes a second annular magnetic member. The second annular magnetic member is fixed in the valve seat, and the second annular magnetic member is located between the exhaust port and the second end of the valve seat. The polarity of the side of the valve plate facing the second annular magnetic member is the same as the polarity of the side of the second annular magnetic member facing the valve plate.

[0010] In some embodiments, the second force-applying member includes a second elastic member. One end of the second elastic member is connected to the second end of the valve seat, and the other end of the second elastic member is connected to the valve plate.

[0011] In some embodiments, a silencing member is assembled on the valve seat. The silencing member has an air flow channel and a silencing cavity. One end of the air flow channel is communicated with the exhaust port, the other end of the air flow channel leads to the outside of the silencing member, and the silencing cavity is communicated with the air flow channel.

[0012] In some embodiments, the number of the silencing cavities is multiple, each silencing cavity is communicated with the air flow channel, and the silencing frequencies of the silencing cavities are different.

[0013] The present invention further provides a compressor, which includes the aforementioned exhaust check valve and a pump body structure. The exhaust check valve is installed on the pump body structure, and the pump body structure has an air outlet, and the position of the air outlet corresponds to the position of the air inlet.

[0014] An exhaust check valve and a compressor having the same provided by the present invention have the following beneficial effects: When the exhaust check valve of the present application is installed at the air outlet of the stationary scroll plate and after the exhaust is completed, during the return process of the valve plate moving from the conducting position to the cut-off position, the first biasing member is configured to apply a force to the valve plate in the direction from the cut-off position to the conducting position, that is, the first biasing member is configured to apply a force to the valve plate opposite to the return direction. Therefore, the valve plate can be prevented from slapping the valve seat or the stopper, and the slapping noise can be eliminated. Description of the Drawings

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0016] Figure 1 A cross-sectional view of the exhaust check valve according to an embodiment of the present invention assembled on the stationary scroll plate with the valve plate in the cut-off position; Figure 2 A cross-sectional view of the exhaust check valve according to an embodiment of the present invention assembled on the stationary scroll plate with the valve plate in the communicating position; Figure 3 A schematic structural view of the exhaust check valve according to an embodiment of the present invention assembled on the stationary scroll plate; Figure 4 A top view of the exhaust check valve according to an embodiment of the present invention assembled on the stationary scroll plate; Figure 5 A cross-sectional view of the exhaust check valve according to an embodiment of the present invention; Figure 6 A side view of the exhaust check valve according to an embodiment of the present invention; Figure 7 A top view of the exhaust check valve according to an embodiment of the present invention; Figure 8 A cross-sectional view of the valve plate of the exhaust check valve according to an embodiment of the present invention.

[0017] The reference numerals are shown as: 1, valve seat; 2, valve plate; 3, air inlet; 4, air outlet; 5, first annular magnetic member; 6, vent; 7, second annular magnetic member; 8, silencing member; 9, air flow channel; 10, silencing cavity; 11, stationary scroll plate. Detailed Embodiments

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the scope of protection of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0020] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the spatial relative descriptions used here.

[0021] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, these words have no special meanings. Therefore, it cannot be understood as a limitation on the scope of protection of the present invention.

[0022] See in conjunction with Figures 1 to 8As shown, according to an embodiment of the present invention, an exhaust check valve is provided, which includes a valve seat 1, a valve plate 2 and a first biasing member. An air inlet 3 is formed at the first end of the valve seat 1, and an exhaust port 4 is formed on the side surface of the valve seat 1. The valve plate 2 is movably disposed within the valve seat 1. The valve plate 2 has a conducting position where the air inlet 3 and the exhaust port 4 are in communication, and a cutoff position where the air inlet 3 and the exhaust port 4 are not in communication. During the process of the valve plate 2 moving from the conducting position to the cutoff position, the first biasing member is configured to apply a force to the valve plate 2 in the direction from the cutoff position to the conducting position.

[0023] In this technical solution, when the exhaust check valve of the present application is installed at the air outlet of the stationary scroll disk 11 and the exhaust is completed, since during the return process of the valve plate 2 moving from the conducting position to the cutoff position, the first biasing member is configured to apply a force to the valve plate 2 in the direction from the cutoff position to the conducting position, that is, the first biasing member is configured to apply a force to the valve plate 2 opposite to the return direction. Therefore, it is possible to prevent the valve plate 2 from slapping against the valve seat or the limiter, and eliminate the slapping noise. At the same time, it can also alleviate the noise caused by the flutter of the valve plate 2. Wherein, the first end of the valve seat 1 is the bottom end of the valve seat 1.

[0024] Refer to in combination Figure 1 、 Figure 2 and Figure 5 As shown, the valve plate 2 has magnetism. The first biasing member includes a first annular magnetic member 5. The first annular magnetic member 5 is fixed within the valve seat 1, and the first annular magnetic member 5 is located between the air inlet 3 and the exhaust port 4. The valve plate 2 is located between the first annular magnetic member 5 and the second end of the valve seat 1. The polarity of the side of the valve plate 2 facing the first annular magnetic member 5 is the same as the polarity of the side of the first annular magnetic member 5 facing the valve plate 2.

[0025] In this embodiment, since the polarity of the side of the valve plate 2 facing the first annular magnetic member 5 is the same as the polarity of the side of the first annular magnetic member 5 facing the valve plate 2, during the return process of the valve plate 2 moving from the conducting position to the cutoff position, the valve plate 2 will be subjected to a repulsive force opposite to the return direction. Then, while the valve plate 2 disconnects the communication between the air inlet 3 and the exhaust port 4, it can also ensure that the valve plate 2 does not contact the first annular magnetic member 5, thereby preventing the valve plate 2 from slapping against the valve seat or the limiter, and further eliminating the slapping noise. Moreover, it can also alleviate the noise caused by the flutter of the valve plate 2. It can be understood that using an annular magnetic member as the first biasing member facilitates the passage of the refrigerant during exhaust. It should be noted that the valve plate 2 having magnetism can be directly made of a magnetic material, or the valve plate 2 can be formed by arranging magnets on both sides of a sheet (such as Figure 8 shown). The valve plate 2 is coaxial and parallel with the first annular magnetic member 5. The calculation formula for the axial force between the two is: , where is the axial force, with the unit ; is the permeability of free space, with a value of ; is the magnetization intensity, a constant; is the radius of the magnet, , that is, half of the sum of the inner and outer diameters of the annular magnetic part, with the unit ; is the thickness of the magnet, with the unit ; is the axial distance between the magnetic rings, with the unit .

[0026] As another implementation manner, the first force - applying component includes a first elastic member (not shown in the figure). One end of the first elastic member extends into the valve seat 1 from the side where the air inlet 3 is located and is connected to the valve plate 2.

[0027] In this technical solution, since one end of the first elastic member extends into the valve seat 1 from the side where the air inlet 3 is located and is connected to the valve plate 2, during the return process of the valve plate 2 moving from the conducting position to the cutoff position, the valve plate 2 will be subjected to an elastic force opposite to the return direction. In this way, it can also be ensured that the valve plate 2 does not strike the valve seat or the limiter, achieving the elimination of the slapping noise. At the same time, it can also alleviate the noise caused by the flutter of the valve plate 2.

[0028] Refer to Figures 1 to 3 as shown, an air vent 6 is provided at the second end of the valve seat 1.

[0029] In this embodiment, the second end of the valve seat 1 is the top end of the valve seat 1. When the air vent 6 is provided at the top end of the valve seat 1, the valve seat 1 will be connected to the high - pressure area inside the compressor from the top. Then, the high - pressure refrigerant inside the compressor will enter from the top of the valve seat 1 and exert a pressure on the valve plate 2, which helps the valve plate 2 to quickly fall back from the conducting position to the cutoff position after the exhaust is completed. That is, the valve plate 2 realizes the quick fall under the combined action of its own gravity and gas pressure.

[0030] As a specific implementation manner, a second force - applying component is further provided inside the valve seat 1. The second force - applying component is located between the valve plate 2 and the second end of the valve seat 1. During the process of the valve plate 2 moving from the cutoff position to the conducting position, the second force - applying component is configured to apply a force to the valve plate 2 in the direction from the conducting position to the cutoff position.

[0031] In this technical solution, when the air outlet of the stationary scroll disk 11 discharges air, it will generate a large impact force on the valve plate 2, which will increase the risk of collision between the valve plate 2 and the second end of the valve seat 1 during the exhaust process. By arranging a second force-applying component between the valve plate 2 and the second end of the valve seat 1, and during the process of the valve plate 2 moving from the cut-off position to the conducting position, the second force-applying component is configured to apply a force to the valve plate 2 in the direction from the conducting position to the cut-off position, that is, the second force-applying component applies a force to the valve plate 2 that is opposite to the exhaust impact force, so as to prevent collision between the valve plate 2 and the second end of the valve seat 1 during the entire exhaust process.

[0032] Referring to Figure 1 and Figure 2 As shown, the valve plate 2 has magnetism, the second force-applying component includes a second annular magnetic member 7, the second annular magnetic member 7 is fixed inside the valve seat 1, and the second annular magnetic member 7 is located between the air outlet 4 and the second end of the valve seat 1. The polarity of the side of the valve plate 2 facing the second annular magnetic member 7 is the same as the polarity of the side of the second annular magnetic member 7 facing the valve plate 2.

[0033] In this embodiment, since the polarity of the side of the valve plate 2 facing the second annular magnetic member 7 is the same as the polarity of the side of the second annular magnetic member 7 facing the valve plate 2, during the process of the valve plate 2 moving from the cut-off position to the conducting position, the valve plate 2 will also be subjected to a repulsive force opposite to the exhaust impact force, so as to ensure that no collision occurs between the valve plate 2 and the second end of the valve seat 1 during the entire exhaust process. It can be understood that using an annular magnetic member as the second force-applying component facilitates the high-pressure refrigerant in the compressor to enter from the air vent 6 of the valve seat 1 and press on the valve plate 2.

[0034] As another implementation manner, the second force-applying component includes a second elastic member (not shown in the figure). One end of the second elastic member is connected to the second end of the valve seat 1, and the other end of the second elastic member is connected to the valve plate 2.

[0035] In this technical solution, since one end of the second elastic member is connected to the second end of the valve seat 1 and the other end of the second elastic member is connected to the valve plate 2, during the process of the valve plate 2 moving from the cut-off position to the conducting position, the valve plate 2 will also be subjected to an elastic force opposite to the exhaust impact force, so as to ensure that no collision occurs between the valve plate 2 and the second end of the valve seat 1 during the entire exhaust process.

[0036] It can be understood that the arrangement of the first force-applying component and the second force-applying component enables the valve plate 2 to float inside the valve seat 1. During exhaust, the valve plate 2 will not hit the top of the valve seat 1. After the exhaust ends, although the valve plate 2 will also fall appropriately, no slapping noise will be generated. After the valve plate 2 falls below the air outlet 4, the air inlet 3 and the air outlet 4 can be made non-communicating.

[0037] Referring to Figure 3 、Figure 4 and Figure 6 As shown, two exhaust ports 4 are formed on the side surface of the valve seat 1, and the two exhaust ports 4 are oppositely arranged on the valve seat 1.

[0038] In this embodiment, the opposite arrangement of the two exhaust ports 4 on the valve seat 1 enables a larger exhaust volume per unit time and smoother exhaust, which can reduce the energy consumption of gas resistance.

[0039] Referring to Figure 3 and Figure 4 As shown, a silencing member 8 is assembled on the valve seat 1. The silencing member 8 has an air flow channel 9 and a silencing cavity 10. One end of the air flow channel 9 communicates with the exhaust port 4, the other end of the air flow channel 9 leads to the outside of the silencing member 8, and the silencing cavity 10 communicates with the air flow channel 9.

[0040] In this technical solution, by assembling the silencing member 8 on the valve seat 1, the exhaust check valve can also have a silencing effect, so that there is no need to separately install a silencer in the compressor, making the combination of related components more compact and saving space. At the same time, due to the presence of the silencing member 8, the acoustic cavity mode of the compression cavity, the acoustic cavity resonance noise at the moment when the exhaust valve plate opens, and the exhaust noise during the exhaust process can be solved to a certain extent. It can be understood that when there are two exhaust ports 4, the number of silencing members 8 is also two.

[0041] Referring to Figure 4 As shown, the number of silencing cavities 10 is multiple, and each silencing cavity 10 communicates with the air flow channel 9. The silencing frequencies of each silencing cavity 10 are different, so that the exhaust noise of different frequencies can be silenced. Specifically, the number of silencing cavities 10 on each silencing member 8 is four. Each silencing cavity has selectivity for the noise frequency, and the silencing cavity frequency corresponds to the acoustic cavity mode of the exhaust cavity or the acoustic cavity resonance frequency to eliminate the exhaust noise generated therefrom.

[0042] The present invention also provides a compressor, including the aforementioned exhaust check valve and a pump body structure. The exhaust check valve is installed on the pump body structure. The pump body structure has an air outlet, and the position of the air outlet corresponds to the position of the air inlet 3. The exhaust check valve is installed on the pump body structure by two screws. It should be noted that the pump body structure can be either the pump body structure of a scroll compressor or the pump body structure of a roller compressor, that is, the exhaust check valve of the present application can be applied to both a scroll compressor and a roller compressor.

[0043] It is easily understood by those skilled in the art that, on the premise of no conflict, the advantageous technical features of the above-mentioned various methods can be freely combined and superimposed.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and variations can be made, and these improvements and variations should also be regarded as within the protection scope of the present invention.

Claims

1. An exhaust check valve, characterized in that: The invention comprises a valve seat (1), a valve plate (2) and a first force-applying component, wherein an air inlet (3) is formed at a first end of the valve seat (1), an air outlet (4) is provided on a side of the valve seat (1), the valve plate (2) can be movably arranged in the valve seat (1), the valve plate (2) has a conducting position for connecting the air inlet (3) and the air outlet (4) and a cut-off position for disconnecting the air inlet (3) and the air outlet (4), and during the process of the valve plate (2) moving from the conducting position to the cut-off position, the first force-applying component is configured to apply a force in a direction from the cut-off position to the conducting position to the valve plate (2); The valve plate (2) has magnetism, the first force-applying component comprises a first annular magnetic component (5), the first annular magnetic component (5) is fixed in the valve seat (1), and the first annular magnetic component (5) is located between the air inlet (3) and the air outlet (4), the valve plate (2) is located between the first annular magnetic component (5) and the second end of the valve seat (1), and the polarity of the side of the valve plate (2) facing the first annular magnetic component (5) is the same as the polarity of the side of the first annular magnetic component (5) facing the valve plate (2); Alternatively, the first force-applying component comprises a first elastic member, one end of the first elastic member extending from the side where the air inlet (3) is located into the valve seat (1) and connected to the valve plate (2).

2. The exhaust check valve according to claim 1, characterized in that: The second end of the valve seat (1) is provided with a vent (6); and / or the side surface of the valve seat (1) is provided with two exhaust ports (4), and the two exhaust ports (4) are arranged opposite to each other on the valve seat (1).

3. The exhaust check valve according to claim 1 or 2, characterized in that: A second force-applying component is also provided in the valve seat (1), and the second force-applying component is located between the valve plate (2) and the second end of the valve seat (1). When the valve plate (2) moves from the cut-off position to the conduction position, the second force-applying component is configured to apply a force in the direction from the conduction position to the cut-off position to the valve plate (2).

4. The exhaust check valve according to claim 3, characterized in that: The valve plate (2) is magnetic, the second force-applying component comprises a second annular magnetic component (7), the second annular magnetic component (7) is fixed in the valve seat (1), and the second annular magnetic component (7) is located between the exhaust port (4) and the second end of the valve seat (1), and the polarity of the side of the valve plate (2) facing the second annular magnetic component (7) is the same as the polarity of the side of the second annular magnetic component (7) facing the valve plate (2).

5. The exhaust check valve according to claim 3, characterized in that: The second force-applying component comprises a second elastic member, one end of the second elastic member is connected to the second end of the valve seat (1), and the other end of the second elastic member is connected to the valve plate (2).

6. The exhaust check valve according to claim 1, characterized in that: A silencer (8) is assembled on the valve seat (1), and the silencer (8) has an air flow channel (9) and a silencer chamber (10), one end of the air flow channel (9) is connected to the exhaust port (4), the other end of the air flow channel (9) leads to the outside of the silencer (8), and the silencer chamber (10) is connected to the air flow channel (9).

7. The exhaust check valve according to claim 6, characterized in that: There are a plurality of the silencing cavities (10), each of the silencing cavities (10) is in communication with the air flow channel (9), and each of the silencing cavities (10) has a different silencing frequency.

8. A compressor, characterized in that: It comprises the exhaust check valve and pump body structure according to any one of claims 1 to 7, wherein the exhaust check valve is mounted on the pump body structure, and the pump body structure has an air outlet, and the position of the air outlet corresponds to the position of the air inlet (3).

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