Air suction structure and compressor with same

Abstract

The air suction structure can be arranged in an air suction channel of the compressor, the air suction structure comprises an air cylinder valve seat, an air suction port is formed in the air cylinder valve seat, and an air suction valve plate is arranged at the end, close to an air cylinder, of the air cylinder valve seat; wherein the air suction valve plate has elasticity; under the condition that the air cylinder sucks air, the air suction valve plate can open the air suction port; and when the air pressure at one end of the cylinder valve seat is greater than or equal to that at the other end, the air suction valve plate can close the air suction port. In the air inlet stage of the compressor, airflow can normally pass through the air suction structure, and the air suction efficiency is guaranteed; when air pressure of the upper portion of the air inlet channel is larger than or equal to that of the lower portion of the air inlet channel, the air suction valve plate can cover the air suction port, and therefore air flow of the upper portion of the air inlet channel is prevented from flowing back. According to the air suction structure, the problem of air backflow of the air cylinder is solved, so that the air suction efficiency of the compressor is improved, and the volume efficiency of the compressor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotor compressors, and in particular relates to an air suction structure and a compressor having the same. Background Art

[0002] Rotary compressor is a commonly used compressor. Rotary compressor is widely used because of its advantages of few parts, few wearing parts, high reliability, stable and safe operation. Rotary compressor is driven by the crankshaft to rotate the roller inside the cylinder to compress and discharge the gas entering the cylinder. During operation, the cylinder is divided into an intake chamber and an exhaust chamber by the roller. The roller and the inner wall of the cylinder are matched with a gap. When the gap on the intake side is larger than the gap on the exhaust side, there may be reflux at the intake port during the compression process. For example, the reflux and expansion of the gaseous refrigerant will affect the intake volume per unit time, resulting in a decrease in the intake efficiency, thereby reducing the volumetric efficiency of the compressor.

[0003] As an improvement, the prior art enhances the unidirectionality of the intake flow by improving the shape of the intake hole of the cylinder, making it easier for the gas flowing from the intake port to the cylinder to enter than to exit, thereby reducing the reflux of the gas. However, such a design has limited ability to prevent the reflux of the gas. Therefore, the rotary compressor of the prior art may still have the problem of gas reflux at the position of the intake channel. Utility Model Content

[0004] In view of this, the utility model provides an air intake structure and a compressor having the same, which can solve the problem of gas backflow in the air intake passage of the current rotor compressor.

[0005] In order to solve the above problems, the utility model mainly provides the following technical solutions:

[0006] On the one hand, the utility model provides an air intake structure, which can be arranged in the air intake channel of the compressor, and the air intake structure includes a cylinder valve seat, the cylinder valve seat is provided with an air intake port, and the cylinder valve seat is provided with an air intake valve sheet at one end close to the cylinder; wherein:

[0007] The air intake valve plate is elastic; when the cylinder is inhaling air, the air intake valve plate can open the air intake port; when the air pressure at one end of the cylinder valve seat is greater than or equal to the air pressure at the other end, the air intake valve plate can close the air intake port.

[0008] In some embodiments, a limiter is further included, which is located at one end of the intake valve plate away from the cylinder valve seat; when the cylinder is inhaling air, the intake valve plate can fit to the limiter to allow the gas to be introduced into the cylinder.

[0009] In some embodiments, the limiting member includes a first fixing plate and a first lateral plate surrounding the first fixing plate, and the first lateral plate is inclined outwardly in a direction of the cylinder.

[0010] In some embodiments, the first side plate is provided with an air passage groove.

[0011] In some embodiments, the intake valve plate includes a second fixed plate and a second lateral plate surrounding it; correspondingly, the cylinder valve seat includes a third fixed plate and a third lateral plate surrounding it; the second lateral plate and the third lateral plate are both inclined outward along the direction of the cylinder.

[0012] In some embodiments, an inclination angle of the first side plate along the cylinder direction is greater than inclination angles of the second side plate and the third side plate along the cylinder direction.

[0013] In some embodiments, the intake valve plate and the limit member are both installed on the cylinder intake channel, the diameter of the upper end of the cylinder intake channel is D1, the diameter of the lower end of the cylinder intake channel is D2, the maximum lateral distance of the intake valve plate in the cylinder intake channel is d1, and the maximum lateral distance of the limit member in the cylinder intake channel is d2; wherein, D2<d1<D1, d1-D2>2mm; 0<d1-d2<1.5mm.

[0014] In some embodiments, the cylinder valve seat is provided with at least two air inlets, and the air inlet valve sheet is provided with an air inlet valve flap corresponding to each air inlet.

[0015] In some embodiments, a fixing member is further included, and a through hole is opened in the middle position of the cylinder valve seat and the intake valve plate. The fixing member passes through the cylinder valve seat and the intake valve plate in sequence along the through hole, so as to fix the intake valve plate to the cylinder valve seat along the axial direction of the intake passage.

[0016] In some embodiments, the fixing member and the suction valve plate are both detachably disposed on the suction valve seat.

[0017] On the other hand, the utility model also provides a compressor, which includes the above-mentioned air intake structure.

[0018] Compared with the prior art, the air intake structure and the compressor having the same provided by the utility model have at least the following beneficial effects:

[0019] In the technical solution provided by the utility model, the utility model provides an air intake structure, which can be arranged in the air intake channel of the compressor, and the air intake structure includes a cylinder valve seat, the cylinder valve seat is provided with an air intake port, and the cylinder valve seat is provided with an air intake valve plate at one end close to the cylinder; wherein: the air intake valve plate is elastic; when the cylinder is inhaling air, the air intake valve plate can open the air intake port; when the air pressure at one end of the cylinder valve seat is greater than or equal to the air pressure at the other end thereof, the air intake valve plate can close the air intake port. Based on this, the utility model designs the intake structure at the position of the intake channel. When the cylinder inhales air, the airflow drives the intake valve plate to bounce toward the direction of the cylinder, and the intake valve plate can open the intake port to ensure that the gas enters the cylinder; when the intake side gap in the cylinder is greater than or equal to the exhaust side gap, that is, when the air pressure of the intake valve plate close to the cylinder is greater than or equal to the air pressure at the bottom of the cylinder valve seat, the intake valve plate can cover the intake port according to its own elasticity or rebound to the intake port part; if the air pressure close to the cylinder is greater than the air pressure at the bottom of the intake channel, the air pressure will also act on the intake valve plate to make the intake valve plate further fit the intake port, thereby closing the intake port, thereby reducing the gas reflux in this state. To sum up, when the air pressure in the upper part of the intake passage is greater than or equal to the air pressure in the lower part of the intake passage, the intake valve sheet of the utility model will cover the intake port to block the air flow backflow in the upper part of the intake passage. In this way, by setting the intake structure of the utility model, the backflow of gas in the cylinder is reduced, thereby improving the intake efficiency of the compressor and the volumetric efficiency of the compressor.

[0020] In some embodiments, a limiter is also included, and the limiter is located at one end of the air intake valve plate away from the cylinder valve seat; when the cylinder is inhaling, the air intake valve plate can fit to the limiter so as to allow gas to be introduced into the cylinder. The utility model installs a limiter on the upper part of the air intake valve plate. During the air intake stage of the cylinder, the air intake valve plate is attached to the limiter after it bounces up. When the air intake port is opened, the limiter limits the maximum bounce distance. In this way, the damage to the air intake valve plate caused by the excessive bounce amplitude of the air intake valve plate driven by the airflow during the air intake stage can be avoided, thereby improving the service life of the air intake valve plate.

[0021] In some embodiments, the limiting member includes a first fixed plate and a first lateral plate surrounding the first fixed plate, and the first lateral plate is inclined outwardly in the direction of the cylinder. The limiting member of the utility model is fixed to the air intake valve plate in the middle position, and forms an inclined surface in the direction of the cylinder on the side, so that the air intake valve plate will bounce onto the inclined surface during the air intake stage, thereby ensuring that the air intake channel is open and limiting the air intake valve plate for protection. As a preferred embodiment, the first lateral plate is provided with an air passing groove. The gas flow area of ​​the air intake channel can be increased by grooving while limiting the protection of the air intake valve plate, thereby improving the air intake efficiency of the cylinder during the air intake stage.

[0022] In some embodiments, the intake valve plate includes a second fixed plate and a second lateral plate surrounding it; correspondingly, the cylinder valve seat includes a third fixed plate and a third lateral plate surrounding it; the second lateral plate and the third lateral plate are both inclined outwardly in the direction of the cylinder. The intake valve seat and the intake valve plate of the utility model also include a fixed portion in the middle and an inclined portion on the side, and the inclination direction is also inclined toward the cylinder direction. The intake valve seat is mainly designed to be inclined for the inclined structure of the intake valve plate, and the inclination direction and angle of the two are consistent. The main purpose of designing the inclined side of the intake valve plate is to reduce the bending degree of the intake valve plate during operation, thereby improving the service life of the intake valve plate. On this basis, the inclination angle of the first lateral plate of the limiter 5 is greater than the inclination angle of the second lateral plate of the intake valve plate, so as to ensure the smoothness of the intake channel during the intake stage and improve the efficiency of the intake.

[0023] In some embodiments, the cylinder valve seat is provided with at least two air inlets, and the air inlet valve plate is provided with an air inlet valve flap corresponding to each air inlet. The utility model forms at least two air inlet valve flaps on the side of the air inlet valve plate, and of course, the cylinder valve seat is provided with a corresponding air inlet corresponding to each air inlet valve flap. When designing at least two air inlet valve flaps, the connection area between the air inlet valve seat and the cylinder channel is increased, the pressure under the same pressure is reduced, and the structure is more stable. At the same time, the greater the pressure on the air inlet valve flap under the same pressure, the higher the response speed of the air inlet valve plate can be.

[0024] In some embodiments, the utility model further includes a fixing part, and a through hole is provided in the middle of the cylinder valve seat and the intake valve plate, and the fixing part passes through the cylinder valve seat and the intake valve plate in sequence along the through hole, so as to fix the intake valve plate to the cylinder valve seat along the axial direction of the intake passage. The utility model improves the stability and tightness of the intake structure by setting a fixing part that passes through the cylinder valve seat, the intake valve plate, and the limiter, thereby further improving the intake efficiency of the intake structure and the ability to avoid backflow. Moreover, the fixing part and the intake valve plate are both detachably arranged on the intake valve seat, so that the disassembly and assembly of the intake structure of the utility model is more flexible and convenient, thereby effectively improving the practicality of the intake structure.

[0025] On the other hand, the utility model also provides a compressor, which includes the above-mentioned intake structure. By adopting the compressor with the intake structure of the utility model, it is possible to reduce the reflux of gas during cylinder operation to a certain extent while ensuring the intake function, thereby improving the intake efficiency of the compressor and further improving the volumetric efficiency of the compressor.

[0026] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0028] Figure 1 This is a structural schematic diagram of the installation state of the air intake structure of one embodiment of the utility model;

[0029] Figure 2 It is a structural schematic diagram of an air intake structure in an anti-backflow state according to an embodiment of the utility model;

[0030] Figure 3 It is a structural schematic diagram of an air intake structure in an air intake state according to another embodiment of the utility model;

[0031] Figure 4 This is a schematic structural diagram of an air intake valve sheet according to an embodiment of the utility model;

[0032] Figure 5 This is a schematic diagram of the structure of a cylinder valve seat in one embodiment of the utility model;

[0033] Figure 6 This is a schematic diagram of the structure of a position limiting member in one embodiment of the utility model;

[0034] Figure 7 It is a structural schematic diagram of a fixing member of an embodiment of the utility model;

[0035] Figure 8 This is a top view of the assembly of the air intake structure of one embodiment of the utility model;

[0036] Fig. 9 It is an assembly top view of an air intake structure of another embodiment of the utility model.

[0037] Reference numerals:

[0038] 1. cylinder, 2. cylinder air intake passage, 21. upper end of cylinder air intake passage, 22. lower end of cylinder air intake passage;

[0039] 3. Cylinder valve seat; 31. Valve seat through hole, 32. Third fixing plate, 33. Third side plate, 331. Air intake port;

[0040] 4. Intake valve plate, 41. Valve plate through hole, 42. Second lateral plate, 421. Intake valve flap, 422. Spacer groove, 43. Second fixing plate;

[0041] 5. Limiting member, 51. Baffle through hole, 52. First fixing plate, 53. First lateral plate, 531. Limiting plate, 532. Air passage; 6. Fixing member. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), 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.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, 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 utility model.

[0045] like Figure 1 , Figure 2 and Figure 5 As shown, the utility model provides an air intake structure and a compressor having the same. The air intake structure can be arranged in the air intake channel of the compressor. The air intake structure includes a cylinder valve seat 3. The cylinder valve seat 3 is provided with an air intake port 331. The cylinder valve seat 3 is provided with an air intake valve plate 4 at one end close to the cylinder 1; wherein: the air intake valve plate 4 is elastic; when the cylinder 1 is inhaling air, the air intake valve plate 4 can open the air intake port 331; when the air pressure at one end of the cylinder valve seat 3 is greater than or equal to the air pressure at the other end, the air intake valve plate 4 can close the air intake port 331. The utility model can reduce the backflow of gas in the cylinder 1 and thereby improve the efficiency of the compressor by designing the air intake structure at the position of the air intake channel. Figure 3As shown, when the cylinder 1 is in the suction state, the cylinder 1 inhales air, and the kinetic energy of the airflow drives the edge of the suction valve plate 4 to bounce toward the direction of the cylinder 1, so that the suction valve plate 4 can make the suction port 331 of the cylinder valve seat 3 in an open state, so that the gas enters the cylinder 1; in the state of the cylinder 1 working, there is a gap on the suction side that is greater than or equal to the gap on the exhaust side, and at this stage, there will be a pressure in the upper part of the cylinder suction channel 2 that is greater than or equal to the pressure in the lower part of the cylinder suction channel 2. When the air pressure in the upper and lower parts of the suction channel 2 is the same, the suction valve plate 4 can cover the suction port 331 according to its own elasticity, thereby reducing the gas in the upper part of the cylinder suction channel 2 from flowing back to the lower part of the cylinder suction channel 2. When the air pressure in the upper part of the suction channel 2 is greater than the air pressure in the lower part, the force of the air pressure will further act on the suction valve plate 4 so that the suction valve plate 4 further fits and covers the suction port 331, so that the suction port is closed more thoroughly, and the gas reflux in this state can be further reduced. In summary, by providing the air intake structure of the present invention, the problem of gas reflux in the cylinder during operation can be improved to a certain extent, thereby improving the volumetric efficiency of the compressor.

[0046] In some embodiments, the utility model further includes a stopper 5, which is located at one end of the air intake valve plate 4 away from the cylinder valve seat 3; when the cylinder 1 is inhaling air, the air intake valve plate 4 can be attached to the stopper to guide the gas into the cylinder 1. Figure 1-Figure 3 As shown, in the embodiment, the utility model also installs a limiter 5 at the upper end of the air intake valve plate 4. The limiter 5 can sometimes also be called an air intake baffle. The middle position of the limiter 5 and the air intake valve plate 4 are fixed on the cylinder valve seat 3, and the cylinder valve seat is fixed on the inner wall of the cylinder air intake channel 2. Of course, there is a gas passage reserved between the limiter 5 and the air intake valve plate 4 (in actual operation, it can be reasonably selected so that this part can allow airflow to pass through, such as the middle of the limiter 5 is fixed, and the edge part is designed such as steps, curved structures, etc.), so as to ensure the passage of gas. In this way, during the cylinder air intake stage, the limiter 5 can limit the amplitude of the air intake valve plate 4 after it bounces up, so as to protect the air intake valve plate 4 from transitional bending driven by airflow. Through the installation and design of the limiter 5, the utility model prevents the air intake valve plate 4 from transitional bending during the air intake stage, thereby improving the service life of the air intake valve plate.

[0047] like Figure 6As shown, in some embodiments, the utility model is based on the fact that an air passage is reserved between the stopper 5 and the air intake valve plate 4. The stopper includes a first fixing plate 52 and a first lateral plate 53 surrounding it. The first lateral plate 53 is tilted outwardly in the direction of the cylinder 1, and the side portion of the stopper 5 can be folded at a certain angle toward the air intake direction of the cylinder air intake channel 2. In this way, the middle position of the stopper 5 and the air intake valve plate 4 can be fitted and fixed, and after the air intake valve plate 4 bounces up driven by the air flow, the air flow passes through the first lateral plate 53 of the stopper 5.

[0048] like Figure 6 As shown, as a preferred embodiment, on the basis of the above, the utility model opens an air passage groove 532 on the first lateral plate 53 of the limiting member 5. Of course, the remaining positions of the first lateral plate 53 form a limiting plate 531, which is used to block the inhalation valve plate 4 to limit the inhalation valve plate 4 during the inhalation stage. On the basis of the airflow passing through the side of the first lateral plate 53 of the limiting member 5 during the inhalation stage, the airflow can also pass through the air passage groove 532 at the same time. Through the above design, the utility model increases the ventilation area during the inhalation stage, thereby improving the inhalation efficiency.

[0049] like Figure 4 and Figure 5 As shown, in some embodiments, the air intake valve plate 4 of the utility model includes a second fixing plate 43 and a second lateral plate 42 surrounding the second fixing plate 43; correspondingly, the cylinder valve seat 3 includes a third fixing plate 32 and a third lateral plate 33 surrounding the third fixing plate 32; the second lateral plate 42 and the third lateral plate 33 are both inclined outwardly in the direction of the cylinder 1. The utility model designs the second lateral plate 42 of the air intake valve plate 4 as an inclined structure inclined in the direction of the cylinder 1, and of course, the third lateral plate 33 of the cylinder valve seat 3 is also inclined in the same manner as the second lateral plate 42. The third lateral plate 33 adopts this design to cooperate with the structure of the second lateral plate 42, so that the air intake valve plate 4 can fit with the cylinder valve seat 3 in a natural state to form a relatively sealed structure. The purpose of the inclined design of the second side plate 42 of the utility model is to reduce the bending degree of the intake valve plate 4 during the intake stage, so that the intake valve plate 4 can bend within a small range to achieve the intake operation. In this way, the intake valve plate is not bent to a high degree during operation, which prolongs the time of its failure or breakage, and can further increase the life of the intake valve plate 4, thereby increasing the overall service life of the intake structure of the utility model.

[0050] On the basis of the above, if Figure 1 and Figure 2As shown, the inclination angle of the first side plate 53 of the utility model along the direction of the cylinder 1 is greater than the inclination angles of the second side plate 42 and the third side plate 33 along the direction of the cylinder 1. By increasing the inclination angle of the first side plate 53, a larger air passage is formed with the second side plate 42, thereby further increasing the ventilation area of ​​the air intake, thereby ensuring the smoothness of the air intake channel during the air intake stage and improving the air intake efficiency.

[0051] In some embodiments, the cylinder valve seat 3 of the utility model is provided with at least two air inlets 331, and the air inlet valve plate 4 is formed with an air inlet valve flap 421 corresponding to each air inlet 331. Figure 4 and Figure 5 As shown, as a specific embodiment, the second side plate 42 of the air intake valve plate 4 is processed with three air intake valve flaps 421, and a spacing groove 422 is formed between the three air intake valve flaps 421. Correspondingly, the cylinder valve seat 3 is processed with three air intake ports 331. The three air intake ports 331 correspond to the three air intake valve flaps 421 one by one. In the air intake stage, the air flow drives the three air intake valve flaps 421 to bounce toward the direction of the cylinder 1, so that the three air intake ports 331 are opened, and then the air intake passage is opened, so that the air flow smoothly enters the cylinder 1. Since the pressure of the cylinder air intake channel 2 is zero after the roller rotates one circle and returns to the starting point, the residual gas that has not been exhausted is easy to flow back and expand, and may flow back along the cylinder air intake channel 2, causing air intake loss. Through the above-mentioned design, the utility model can make the three suction valve flaps 421 elastically reset and fit each corresponding suction port 331 of the suction valve seat, so that the backflow amount of residual gas along the cylinder suction channel 2 is greatly reduced, and it is even possible to avoid backflow, thereby reducing the loss caused by gas backflow and improving the operating efficiency of the compressor.

[0052] like Figure 7 As shown, in some embodiments, in order to improve the overall stability of the air intake structure of the utility model, the air intake structure of the utility model further includes a fixing member 6, a valve seat through hole 31 is provided in the middle position of the cylinder valve seat 3, a valve plate through hole 41 is provided in the middle position of the air intake valve plate 4, and a baffle through hole 51 is provided in the middle position of the stopper 5, so that the fixing member 6 passes through the three so that the air intake valve plate 4 and the stopper 5 are fixed to the cylinder valve seat 3. As a specific embodiment, the cylinder valve seat 3 can be fixedly set on the side wall of the cylinder air intake channel 2. The fixing member 6 is a structure formed by three sections of cylinders, the diameter of the cylinders at the two ends is larger than that of the middle cylinder, and the diameter of the middle cylinder is smaller than the air intake valve plate 4 and the stopper 5 and the through hole in the middle of the cylinder valve seat 3. After the middle cylinder passes through the through hole, the cylinder at one end is detachable, such as by threading, riveting, etc. After the other components are installed, the fixing part 6 is fastened by the cylinder at one end, so that each component is stable and finally a stable air intake structure is formed.

[0053] In a specific embodiment, the cylinder valve seat 3 and the stopper 5 of the utility model are provided with mounting holes, the air intake valve plate 4 and the stopper 5 are placed in sequence, the rivet is installed from the lower end of the cylinder valve seat 3, and the mounting hole of the stopper 5 is passed through, and the impact force is applied to the side of the stopper 5. This assembly method has sufficient rivet deformation, firm connection, and compact structure, so that the processed air intake structure is stable.

[0054] like Figure 8 As shown, in some embodiments, the intake valve plate 4 of the utility model may not be limited to the design of selecting three intake valve flaps 421, and may be designed to be multiple according to actual needs. Of course, the intake port 331 may also be designed to be multiple. The more flaps there are, the larger the connection area between the intake valve seat and the cylinder intake passage 2, the smaller the pressure under the same pressure, and the more stable the structure. The more flaps there are, the smaller the force-bearing area of ​​the intake valve plate 4, and the greater the pressure under the same pressure. The specific design needs to comprehensively select the number of flaps based on the structural strength and the intake efficiency, so as to meet the actual working conditions and design needs.

[0055] like Fig. 9 As shown, in some embodiments, the air inlet 331 of the suction valve seat of the utility model can be designed as a scimitar shape as shown in the figure. At the same time, the design of other parts is also reasonably adjusted to the shape. The utility model adopts the design of this shape to further increase the gas flow area, thereby improving the suction efficiency of the compressor.

[0056] like Figure 2 As shown, in actual working conditions, the diameter of the upper end 21 of the cylinder intake channel of the utility model is D1, the diameter of the lower end 22 of the cylinder intake channel is D2, the intake valve plate 4 and the limit member 5 are both installed on the cylinder intake channel 2, and the maximum lateral distances in the cylinder intake channel 2 under natural conditions are d1 and d2 respectively.

[0057] The design requirements of the parts must meet the following conditions: D2<d1<D1, d1-D2>2mm; 0<d1-d2<1.5mm. This ensures the airflow during the inhalation stage and the purpose of the inhalation valve plate 4 blocking the backflow of the airflow.

[0058] It should be noted that in actual working conditions, the corners of the intake valve seat, the intake valve plate 4, and the limit member 5 need to be processed into arc transitions to avoid installation problems caused by corners and possible inconvenience to the intake structure and installers.

[0059] The utility model also provides a compressor, which includes the above-mentioned intake structure of the utility model. By adopting the compressor with the intake structure of the utility model, the problem of gas reflux can be improved to a certain extent, thereby improving the intake efficiency of the compressor, thereby improving the volumetric efficiency of the compressor, and improving the performance of the compressor.

[0060] The above is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An air intake structure, characterized in that: The air intake structure can be arranged in an air intake passage of a compressor, the air intake structure comprises a cylinder valve seat (3), the cylinder valve seat (3) is provided with an air intake port (331), and the cylinder valve seat (3) is provided with an air intake valve plate (4) at one end close to the cylinder (1); wherein: The air intake valve plate (4) is elastic; when the cylinder (1) is inhaling air, the air intake valve plate (4) can open the air intake port (331); when the air pressure at one end of the cylinder valve seat (3) is greater than or equal to the air pressure at the other end thereof, the air intake valve plate (4) can close the air intake port (331).

2. An air intake structure according to claim 1, characterized in that: It also includes a limiting member (5), which is located at one end of the air intake valve plate (4) away from the cylinder valve seat (3); when the cylinder (1) is inhaling air, the air intake valve plate (4) can be attached to the limiting member (5) so that the gas can be introduced into the cylinder (1).

3. An air intake structure according to claim 2, characterized in that: The limiting member (5) comprises a first fixing plate (52) and a first lateral plate (53) surrounding the first fixing plate, wherein the first lateral plate (53) is inclined outwardly in the direction of the cylinder (1).

4. An air intake structure according to claim 3, characterized in that: The first side plate (53) is provided with an air passage groove (532).

5. The air intake structure according to claim 3, characterized in that: The air intake valve plate (4) comprises a second fixing plate (43) and a second lateral plate (42) surrounding the second fixing plate; correspondingly, the cylinder valve seat (3) comprises a third fixing plate (32) and a third lateral plate (33) surrounding the second fixing plate; the second lateral plate (42) and the third lateral plate (33) are both inclined outwardly in the direction of the cylinder (1).

6. An air intake structure according to claim 5, characterized in that: The inclination angle of the first side plate (53) along the direction of the cylinder (1) is greater than the inclination angles of the second side plate (42) and the third side plate (33) along the direction of the cylinder (1).

7. An air getter structure according to any one of claims 2 to 6, characterized in that: The air intake valve plate (4) and the limiting member (5) are both mounted on the cylinder air intake passage (2); the diameter of the upper end (21) of the cylinder air intake passage is D1, the diameter of the lower end (22) of the cylinder air intake passage is D2, the maximum transverse distance of the air intake valve plate (4) in the cylinder air intake passage (2) is d1, and the maximum transverse distance of the limiting member (5) in the cylinder air intake passage (2) is d2; wherein, D2<d1<D1, d1-D2>2mm; 0<d1-d2<1.5mm.

8. An air getter structure according to any one of claims 1 to 6, characterized in that: The cylinder valve seat (3) is provided with at least two air inlets (331), and the air inlet valve plate (4) is formed with an air inlet valve flap (421) corresponding to each air inlet (331).

9. An air getter structure according to any one of claims 1 to 6, characterized in that: The invention also comprises a fixing member (6), wherein a through hole is provided at the middle position of the cylinder valve seat (3) and the intake valve plate (4), and the fixing member (6) passes through the cylinder valve seat (3) and the intake valve plate (4) in sequence along the through hole, so as to fix the intake valve plate (4) to the cylinder valve seat (3) along the axial direction of the intake passage.

10. An air intake structure according to claim 9, characterized in that: The fixing member (6) and the air intake valve plate (4) are both detachably arranged on the air intake valve seat.

11. A compressor, characterized in that: The compressor comprises the air intake structure according to any one of claims 1-10.

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