Air supplementing structure and compressor

Abstract

The application relates to the technical field of double-cylinder rotary compressors, in particular to a gas supplementing structure and a compressor. In the gas supplementing structure, when the first exhaust hole is dislocated with the first gas supplementing hole and the second exhaust hole is dislocated with the second gas supplementing hole during the rotation of the crankshaft, the first gas supplementing hole and the second gas supplementing hole are not communicated with the gas supplementing channel; when the first exhaust hole is communicated with the first gas supplementing hole and the second exhaust hole is dislocated with the second gas supplementing hole, only the first cylinder is supplemented with gas, and the second cylinder is not supplemented with gas; when the first exhaust hole is dislocated with the first gas supplementing hole and the second exhaust hole is communicated with the second gas supplementing hole, only the second cylinder is supplemented with gas, and the first cylinder is not supplemented with gas. In cooperation with the elastic element, the valve body can reciprocate during the rotation of the crankshaft, indirect gas supplementing between the first cylinder and the second cylinder is realized, the first cylinder and the second cylinder are always not communicated, the gas cross between the first cylinder and the second cylinder can be avoided, the abnormal increase of input power can be prevented, and the performance and energy efficiency of the compressor can be ensured.

Description

Technical Field

[0001] This invention relates to the field of twin-cylinder rotary compressor technology, and more particularly to a gas replenishment structure and compressor. Background Technology

[0002] Jet enthalpy enhancement technology is a key method to improve the low-temperature heating performance of rotary compressors. Its core is to inject medium-pressure refrigerant into the cylinder during the compression process. Currently, one of the mainstream gas injection methods is to open a gas injection hole in the intermediate plate between the upper and lower cylinders to achieve gas injection into the upper and lower cylinders.

[0003] However, in a twin-cylinder rotary compressor, due to the crankshaft's phase relationship, the pistons or rollers are typically symmetrically distributed at 180°. When the intermediate plate uses vertical through-holes as the air supply channel, there exists a specific crankshaft angle range that causes the air supply holes on the upper and lower ends of the intermediate plate to be open simultaneously. At this time, the refrigerant in the high-pressure side cylinder flows directly through the intermediate plate's air supply channel to the low-pressure side cylinder, causing blow-by and resulting in an abnormally high input power, reducing the compressor's performance and energy efficiency.

[0004] Therefore, there is an urgent need for a gas supply structure and compressor to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to propose a gas replenishment structure and compressor that can prevent gas leakage, prevent abnormal increase in input power, and ensure the performance and energy efficiency of the compressor.

[0006] To achieve this objective, the present invention adopts the following technical solution: An air-injection structure includes: a valve body and an elastic element; an intermediate plate is provided with an air-injection channel; a portion of the valve body is slidably disposed within the air-injection channel; the remaining portion of the valve body is exposed at one end of the air-injection channel near the crankshaft; both ends of the valve body abut against the elastic element and the crankshaft respectively; and the air-injection channel communicates with the valve body; the valve body has a first exhaust port and a second exhaust port; the intermediate plate has a first air-injection port on the side facing the first cylinder and a second air-injection port on the side facing the second cylinder; the first exhaust port can communicate with the first air-injection port, and the second exhaust port can communicate with the second air-injection port; the radial distance between the first air-injection port and the second air-injection port is different from the radial distance between the first exhaust port and the second exhaust port; the crankshaft is provided with a first eccentric portion, which abuts against the valve body exposed in the air-injection channel; the crankshaft rotates to move the valve body in the air-injection channel, thereby causing the first exhaust port to be misaligned with the first air-injection port and / or the second exhaust port to be misaligned with the second air-injection port.

[0007] As a preferred technical solution of the above-mentioned air replenishment structure and compressor, the center lines of the first air replenishment hole and the second air replenishment hole are coaxial, and the center lines of the first exhaust hole and the second exhaust hole are misaligned.

[0008] As a preferred technical solution of the above-mentioned air replenishment structure and compressor, the center lines of the first air replenishment hole and the second air replenishment hole are misaligned.

[0009] As a preferred technical solution of the above-mentioned air replenishment structure and compressor, the valve body is U-shaped, and the opening end of the valve body is far away from the crankshaft.

[0010] As a preferred technical solution of the above-mentioned air replenishment structure and compressor, the air replenishment structure further includes an air replenishment pipe, which is inserted through the end of the air replenishment channel away from the crankshaft, and the elastic element is connected between the air replenishment pipe and the valve body.

[0011] As a preferred technical solution of the above-mentioned air replenishment structure and compressor, the area of ​​the first exhaust port is larger than the area of ​​the first air replenishment port, and the area of ​​the second exhaust port is larger than the area of ​​the second air replenishment port.

[0012] As a preferred technical solution of the above-mentioned air replenishment structure and compressor, the inner wall of the air replenishment channel near the crankshaft is provided with an annular limiting part, which can abut against the end face of the valve body. The end face of the valve body near the crankshaft is provided with a protrusion, and part of the protrusion can pass through the annular limiting part and abut against the first eccentric part.

[0013] As a preferred technical solution of the above-mentioned air injection structure and compressor, the crankshaft is provided with a second eccentric part and a third eccentric part, the first eccentric part is located between the second eccentric part and the third eccentric part, and the second eccentric part is located in the first cylinder, and the third eccentric part is located in the second cylinder.

[0014] As a preferred technical solution for the aforementioned gas replenishment structure and compressor, the elastic element is a spring.

[0015] A compressor includes a first cylinder, an intermediate plate, a second cylinder, a crankshaft, and a gas replenishment reservoir. The compressor further includes a gas replenishment structure as described in the preferred embodiment above. The intermediate plate is connected between the first cylinder and the second cylinder. The crankshaft rotatably passes through the first cylinder and the second cylinder. The gas replenishment reservoir is connected to the gas replenishment channel.

[0016] Beneficial effects of this invention: This invention provides a gas-injection structure and a compressor. The gas-injection structure includes a valve body and an elastic element. A gas-injection channel is provided in the intermediate plate. Part of the valve body is slidably disposed in the gas-injection channel, and the remaining part of the valve body is exposed at one end of the gas-injection channel near the crankshaft. Both ends of the valve body abut against the elastic element and the crankshaft, respectively, and the gas-injection channel is connected to the valve body. The valve body has a first exhaust port and a second exhaust port. A first gas-injection port is provided on the side of the intermediate plate facing the first cylinder, and a second gas-injection port is provided on the side of the intermediate plate facing the second cylinder. The first exhaust port can communicate with the first gas-injection port, and the second exhaust port can communicate with the second gas-injection port. The radial distance between the first gas-injection port and the second gas-injection port is different from the radial distance between the first exhaust port and the second exhaust port. The crankshaft is provided with a first eccentric part, which can abut against the valve body exposed in the gas-injection channel. The crankshaft rotates to move the valve body in the gas-injection channel, thereby causing the first exhaust port to be misaligned with the first gas-injection port and / or the second exhaust port to be misaligned with the second gas-injection port.

[0017] Compared to existing technologies, this air-injection structure, by setting the radial distance between the first and second air-injection holes to be different from the radial distance between the first and second exhaust holes, ensures that during crankshaft rotation, when the first exhaust hole and the first air-injection hole are misaligned, and the second exhaust hole and the second air-injection hole are misaligned, neither the first nor the second air-injection hole is connected to the air-injection channel. When the first exhaust hole and the first air-injection hole are connected, and the second exhaust hole and the second air-injection hole are misaligned, the air-injection structure only injects air into the first cylinder, and does not inject air into the second cylinder. When the first exhaust hole and the first air-injection hole are misaligned, and the second exhaust hole and the second air-injection hole are connected, the air-injection structure only injects air into the second cylinder, and does not inject air into the first cylinder. Combined with the elastic element, the valve body can reciprocate during crankshaft rotation, achieving indirect air injection between the first and second cylinders. This ensures that the first and second cylinders are never connected, preventing cross-contamination between the first and second cylinders, preventing abnormal increases in input power, and guaranteeing the compressor's performance and energy efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the initial position of the gas replenishment structure provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the first gas replenishment position of the gas replenishment structure provided in an embodiment of the present invention; Figure 3This is a schematic diagram of the second gas replenishment position of the gas replenishment structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the valve body provided in an embodiment of the present invention.

[0020] In the picture: 1. First cylinder; 2. Intermediate plate; 21. Air supply passage; 3. Second cylinder; 4. Crankshaft; 41. First eccentric part; 42. Second eccentric part; 43. Third eccentric part; 5. Valve body; 51. First exhaust port; 52. Second exhaust port; 6. Elastic element; 7. Air supply pipe. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0022] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0025] like Figures 1 to 4 As shown, the present invention provides an air replenishment structure and a compressor. The air replenishment structure includes a valve body 5 and an elastic element 6.

[0026] Specifically, the intermediate plate 2 is provided with an air supply channel 21. Part of the valve body 5 is slidably disposed within the air supply channel 21, while the remaining part of the valve body 5 is exposed at one end of the air supply channel 21 near the crankshaft 4. Both ends of the valve body 5 abut against the elastic element 6 and the crankshaft 4, respectively, and the air supply channel 21 is connected to the valve body 5. The valve body 5 has a first exhaust port 51 and a second exhaust port 52. The intermediate plate 2 has a first air supply port on the side facing the first cylinder 1 and a second air supply port on the side facing the second cylinder 3. 1 can communicate with the first air inlet, and the second exhaust port 52 can communicate with the second air inlet. The radial distance between the first air inlet and the second air inlet is different from the radial distance between the first exhaust port 51 and the second exhaust port 52. The crankshaft 4 is provided with a first eccentric part 41. The first eccentric part 41 can abut against the valve body 5 exposed in the air inlet channel 21. The crankshaft 4 rotates to make the valve body 5 move in the air inlet channel 21, thereby causing the first exhaust port 51 to be misaligned with the first air inlet and / or the second exhaust port 52 to be misaligned with the second air inlet.

[0027] Compared to existing technologies, this air-injection structure, by setting the radial distance between the first and second air-injection holes to be different from the radial distance between the first exhaust hole 51 and the second exhaust hole 52, ensures that during crankshaft 4 rotation, when the first exhaust hole 51 is misaligned with the first air-injection hole, and the second exhaust hole 52 is misaligned with the second air-injection hole, neither the first nor the second air-injection hole is connected to the air-injection channel 21; when the first exhaust hole 51 is connected to the first air-injection hole, and the second exhaust hole 52 is misaligned with the second air-injection hole, this air-injection structure only injects air into the first cylinder 1. No air is supplied to the second cylinder 3. When the first exhaust port 51 is misaligned with the first air supply port and the second exhaust port 52 is connected to the second air supply port, the air supply structure only supplies air to the second cylinder 3, and no air is supplied to the first cylinder 1. With the help of the elastic element 6, the valve body 5 can reciprocate during the rotation of the crankshaft 4, realizing indirect air supply between the first cylinder 1 and the second cylinder 3, so that the first cylinder 1 and the second cylinder 3 are never connected, which can prevent the first cylinder 1 and the second cylinder 3 from cross-flowing air, prevent abnormal increase in input power, and ensure the performance and energy efficiency of the compressor.

[0028] This embodiment provides the following exemplary solution: When the first eccentric part 41 is not in contact with the valve body 5, the air supply structure is in its initial position, the first exhaust port 51 is misaligned with the first air supply port, and the second exhaust port 52 is misaligned with the second air supply port. At this time, neither the first air supply port nor the second air supply port is connected to the air supply channel 21. During the rotation of the crankshaft 4, the first eccentric part 41 presses the valve body 5 to overcome the elastic force of the elastic element 6 and moves. When the first exhaust port 51 is connected to the first air supply port, the second exhaust port 52 is misaligned with the first air supply port. When the first exhaust port 51 is misaligned with the second air inlet, the air inlet structure is in the first air inlet position, only supplying air to the first cylinder 1, and not supplying air to the second cylinder 3; as the crankshaft 4 continues to rotate, the first eccentric part 41 continues to squeeze the valve body 5 to overcome the elastic force of the elastic element 6 and move. When the first exhaust port 51 is misaligned with the first air inlet and the second exhaust port 52 is connected to the second air inlet, the air inlet structure is in the second air inlet position, only supplying air to the second cylinder 3, and not supplying air to the first cylinder 1.

[0029] Of course, in some other embodiments, air replenishment can be performed when the first eccentric part 41 is disengaged from the valve body 5. For example, when the first eccentric part 41 is not in contact with the valve body 5, the air replenishment structure is in the first air replenishment position. At this time, the first exhaust port 51 is connected to the first air replenishment port, and the second exhaust port 52 is misaligned with the second air replenishment port, so only air is replenished into the first cylinder 1, and no air is replenished into the second cylinder 3. During the rotation of the crankshaft 4, the first eccentric part 41 squeezes the valve body 5 to overcome the elastic force of the elastic element 6 and moves. When the first exhaust port 51 is disengaged from the valve body 5, the first eccentric part 41 can be connected to the first air replenishment port. When the first exhaust port 51 is misaligned with the first exhaust port 52 and the second exhaust port 52 is connected to the second exhaust port 21, the air supply structure is in the second air supply position, supplying air only to the second cylinder 3, and not to the first cylinder 1. As the crankshaft 4 continues to rotate, the first eccentric part 41 compresses the valve body 5, overcoming the elastic force of the elastic element 6. When the first exhaust port 51 is misaligned with the first exhaust port 51 and the second exhaust port 52 is misaligned with the second exhaust port 52, the air supply structure is in the initial position, and neither the first nor the second exhaust port is connected to the air supply channel 21. The order of the initial position, the first air supply position, and the second air supply position is determined according to the actual situation and is not further limited here.

[0030] Optionally, the centerlines of the first and second air supply ports are coaxial, while the centerlines of the first exhaust port 51 and the second exhaust port 52 are misaligned. With this configuration, when the crankshaft 4 rotates, causing the first eccentric portion 41 to push the valve body 5 to slide within the air supply channel 21, the misalignment of the first and second exhaust ports 51 and 52 allows the valve body 5 to individually supply air to the first cylinder 1 and the second cylinder 3 at different displacements. For example, when the valve body 5 is pushed to the first air supply position, the first exhaust port 51 is aligned and connected to the first air supply port, while the second exhaust port 52, due to the misalignment of its centerlines, remains misaligned and closed with the second air supply port. When the crankshaft 4 continues to rotate and the valve body 5 is pushed to the second air supply position, the second exhaust port 52 connects to the second air supply port, while the first exhaust port 51 remains misaligned and closed with the first air supply port. This air-injection structure retains the ease of machining the coaxial air-injection holes while utilizing the staggered layout of the exhaust holes on the valve body 5. Combined with the drive of the first eccentric part 41 of the crankshaft 4 and the reset of the elastic element 6, it achieves independent, time-sharing air injection for the first cylinder 1 and the second cylinder 3. Throughout the entire operation, the first cylinder 1 and the second cylinder 3 will never be connected simultaneously, fundamentally avoiding cross-contamination and ensuring stable compressor compression ratio, normal input power, and overall machine efficiency.

[0031] Optionally, the center lines of the first air inlet and the second air inlet are misaligned. Specifically, the distance between the first air inlet and the second air inlet is D1, and the distance between the first exhaust port 51 and the second exhaust port 52 is D2. The offset between the first air inlet and the second air inlet increases the physical isolation between them, and, combined with the distance between the first exhaust port 51 and the second exhaust port 52, reduces the risk of cross-contamination. When the crankshaft 4 rotates, driving the first eccentric part 41 to push the valve body 5 to slide within the air supply channel 21, the first exhaust port and the second exhaust port 52 on the valve body 5 move synchronously with the valve body 5. When the valve body 5 is at a certain displacement, the first exhaust port 51 is aligned and connected with the first air supply port. However, since D1 and D2 are not equal, there must be a positional deviation between the second exhaust port 52 and the second air supply port, and they cannot be aligned at the same time, thus maintaining a closed state and achieving air supply only to the first cylinder 1. When the crankshaft 4 continues to rotate, the first eccentric part 41 pushes the valve body 5 to another displacement, and the second exhaust port 52 is aligned and connected with the second air supply port. However, the first exhaust port 51 and the first air supply port are misaligned and closed due to the mismatch in distance, achieving air supply only to the second cylinder 3. In the initial position, the first exhaust port and the second exhaust port 52 are both misaligned with the first air supply port and the second air supply port, and neither the first cylinder 1 nor the second cylinder 3 receives air.

[0032] Optionally, the valve body 5 is U-shaped, with its open end away from the crankshaft 4. With this configuration, the closed end of the valve body 5 faces the crankshaft 4, and the open end faces away from the crankshaft 4. The two side walls of the U-shaped valve body 5 can form surface contact with the inner wall of the air supply channel 21, providing good guidance during the reciprocating sliding of the valve body 5 and preventing deflection or jamming during movement. The closed end facing the crankshaft 4 allows the first eccentric part 41 of the crankshaft 4 to directly abut against the outer wall of the closed end of the valve body 5 during rotation, concentrating the thrust and ensuring uniform force distribution, which is beneficial for the smooth movement of the valve body 5.

[0033] Optionally, the air replenishment structure also includes an air replenishment pipe 7, which passes through the end of the air replenishment channel 21 away from the crankshaft 4. An elastic element 6 connects the air replenishment pipe 7 to the valve body 5. Specifically, one end of the air replenishment pipe 7 is inserted into the inlet of the air replenishment channel 21, and the other end is connected to the air replenishment reservoir. The air replenishment pipe 7 serves as the inlet pipe for the refrigerant to enter the air replenishment channel 21. Its installation method must ensure a tight seal between it and the inner wall of the air replenishment channel 21 to prevent refrigerant leakage. Simultaneously, the air replenishment pipe 7 is fixed in position and not easily displaced. Connecting one end of the elastic element 6 to the air replenishment pipe 7 provides a stable and reliable fixed base for the elastic element 6, avoiding the risk of displacement or detachment of the elastic element 6 during long-term reciprocating compression.

[0034] Optionally, the area of ​​the first exhaust port 51 is larger than the area of ​​the first air inlet port, and the area of ​​the second exhaust port 52 is larger than the area of ​​the second air inlet port. This configuration, with the exhaust port area larger than the air inlet port area, reduces the flow velocity and pressure loss of the refrigerant as it flows through the exhaust port, allowing it to enter the first and second air inlet ports at higher pressure. This reduces pressure drop during the air inlet process, improves air inlet efficiency, and enhances the overall performance of the compressor.

[0035] Optionally, the inner wall of the air supply channel 21 near the crankshaft 4 is provided with an annular limiting part, which can abut against the end face of the valve body 5. The end face of the valve body 5 near the crankshaft 4 is provided with a protrusion, and part of the protrusion can pass through the annular limiting part and abut against the first eccentric part 41. With this configuration, when the valve body 5 slides in the air supply channel 21 towards the crankshaft 4, the end face of the valve body 5 will eventually abut against the annular limiting part, thereby limiting the maximum displacement of the valve body 5 and preventing the valve body 5 from coming out of the air supply channel 21.

[0036] Optionally, the crankshaft 4 is provided with a second eccentric part 42 and a third eccentric part 43. The first eccentric part 41 is located between the second eccentric part 42 and the third eccentric part 43, and the second eccentric part 42 is located in the first cylinder 1, while the third eccentric part 43 is located in the second cylinder 3. Specifically, the first eccentric part 41 is located between the second eccentric part 42 and the third eccentric part 43, that is, at the axial position corresponding to the intermediate plate 2. The first eccentric part 41 is not directly connected to the piston in any cylinder. Its only function is to abut against the protrusion on the end face of the valve body 5 during the rotation of the crankshaft 4, driving the valve body 5 to reciprocate within the air supply channel 21, so that the driving of the valve body 5 and the driving of the cylinder piston are independent of each other and do not interfere with each other.

[0037] Furthermore, the elastic element 6 is a spring.

[0038] The present invention also provides a compressor, including a first cylinder 1, an intermediate plate 2, a second cylinder 3, a crankshaft 4, and a gas replenishment reservoir. The compressor also includes the gas replenishment structure in the above embodiment. The intermediate plate 2 is connected between the first cylinder 1 and the second cylinder 3. The crankshaft 4 is rotatably inserted through the first cylinder 1 and the second cylinder 3. The gas replenishment reservoir is connected to the gas replenishment channel 21. The compressor also includes other essential components that constitute a compressor in the prior art.

[0039] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A gas-replenishing structure, characterized in that, include: The valve body (5) and the elastic element (6) are provided with an air supply channel (21) on the intermediate plate (2). Part of the valve body (5) is slidably disposed in the air supply channel (21), and the remaining part of the valve body (5) is exposed at one end of the air supply channel (21) near the crankshaft (4). The two ends of the valve body (5) abut against the elastic element (6) and the crankshaft (4) respectively, and the air supply channel (21) is connected to the valve body (5). The valve body (5) is provided with a first exhaust port (51) and a second exhaust port (52). The intermediate plate (2) is provided with a first air supply port on the side facing the first cylinder (1) and a second air supply port on the side facing the second cylinder (3). The exhaust port (51) can communicate with the first air supply port, and the second exhaust port (52) can communicate with the second air supply port. The radial distance between the first air supply port and the second air supply port is different from the radial distance between the first exhaust port (51) and the second exhaust port (52). The crankshaft (4) is provided with a first eccentric part (41). The first eccentric part (41) can abut against the valve body (5) exposed in the air supply channel (21). The crankshaft (4) rotates to move the valve body (5) in the air supply channel (21), thereby causing the first exhaust port (51) to be misaligned with the first air supply port and / or the second exhaust port (52) to be misaligned with the second air supply port.

2. The gas-replenishing structure according to claim 1, characterized in that, The center lines of the first air inlet and the second air inlet are coaxial, and the center lines of the first exhaust hole (51) and the second exhaust hole (52) are misaligned.

3. The gas-replenishing structure according to claim 1, characterized in that, The center lines of the first air inlet and the second air inlet are misaligned.

4. The gas-replenishing structure according to claim 1, characterized in that, The valve body (5) is U-shaped, and the open end of the valve body (5) is far away from the crankshaft (4).

5. The gas-replenishing structure according to claim 1, characterized in that, The air supply structure also includes an air supply pipe (7), which is inserted at the end of the air supply channel (21) away from the crankshaft (4), and the elastic element (6) is connected between the air supply pipe (7) and the valve body (5).

6. The gas-replenishing structure according to claim 1, characterized in that, The area of ​​the first exhaust hole (51) is larger than the area of ​​the first air inlet hole, and the area of ​​the second exhaust hole (52) is larger than the area of ​​the second air inlet hole.

7. The gas-replenishing structure according to claim 1, characterized in that, The inner wall of the air supply channel (21) near the crankshaft (4) is provided with an annular limiting part, which can abut against the end face of the valve body (5). The end face of the valve body (5) near the crankshaft (4) is provided with a protrusion, and part of the protrusion can pass through the annular limiting part and abut against the first eccentric part (41).

8. The gas-replenishing structure according to claim 1, characterized in that, The crankshaft (4) is provided with a second eccentric part (42) and a third eccentric part (43). The first eccentric part (41) is located between the second eccentric part (42) and the third eccentric part (43). The second eccentric part (42) is located in the first cylinder (1), and the third eccentric part (43) is located in the second cylinder (3).

9. The gas-replenishing structure according to claim 1, characterized in that, The elastic element (6) is a spring.

10. A compressor comprising a first cylinder (1), an intermediate plate (2), a second cylinder (3), a crankshaft (4), and a replenishing liquid reservoir, characterized in that, The compressor further includes a gas replenishment structure as described in any one of claims 1-9, wherein the intermediate plate (2) is connected between the first cylinder (1) and the second cylinder (3), the crankshaft (4) is rotatably disposed between the first cylinder (1) and the second cylinder (3), and the gas replenishment reservoir is connected to the gas replenishment channel (21).

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