Air cylinder for compressor and compressor

Abstract

The invention relates to the technical field of compressors, and discloses an air cylinder for a compressor. The air cylinder comprises a cylinder body, a first air storage channel and a switch device, an air suction cavity is defined by the cylinder body, and an air suction port is formed and used for communicating the air suction cavity with an air supply system. The first air storage channel is arranged on the cylinder body and provided with an air inlet and an air outlet, the air inlet is communicated with the air supply system, and the air outlet is communicated with the air suction cavity; the switch device is arranged on the first gas storage channel and used for opening or closing the first gas storage channel; when the airflow pressure of the air supply system is larger than the air pressure of the air suction cavity, the switching device opens the first air storage channel, and airflow enters the air suction cavity through the first air storage channel. When airflow pressure of the air supply system is smaller than air pressure of the air suction cavity, the switching device closes the first air storage channel, and airflow enters the air suction cavity through the air suction port. The air pressure of the suction cavity can be kept at a peak value, the compressor capacity is improved, and the suction airflow pulsation stability can be improved. The invention further discloses the compressor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a cylinder for a compressor and the compressor. BACKGROUND

[0002] At present, the cylinder suction port of a rotary compressor is communicated with a liquid accumulator, and the volume of the cylinder suction chamber changes regularly with the rotation angle, so that the refrigerant in the suction pipe presents a regular non-steady flow, forming suction flow pulsation. Due to the influence of suction flow pulsation, the compressor will produce a large noise, and will also affect the compressor capacity.

[0003] The related technology provides a cylinder for a compressor, the cylinder body has a compression chamber, a suction port penetrates the cylinder wall of the cylinder body in the radial direction, a suction sound attenuation structure includes a groove arranged on the axial end surface of the cylinder body, and a connecting pipe communicated between the groove and the suction port. The groove on the axial end surface of the cylinder body and the upper flange jointly form a resonance cavity, the connecting pipe connects the resonance cavity and the suction port, the gas entering from the suction port will enter the resonance cavity through the connecting pipe, the pressure pulsation in the suction process can be reduced, and the performance of the compressor can be improved under high load conditions.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] In the related technology, when the pressure in the resonance cavity rises, the gas will be pressed back to the suction port through the connecting pipe, causing the gas flow flowing back from the resonance cavity to impact the gas flow flowing out of the liquid accumulator at the suction port, affecting the stability of the suction flow pulsation.

[0006] It should be noted that the information disclosed in the above background art section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine the key / important elements or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0008] The embodiments of the present disclosure provide a cylinder for a compressor and the compressor to improve the stability of the suction flow pulsation.

[0009] According to a first aspect of the present invention, a cylinder for a compressor is provided. The cylinder includes: a cylinder body defining a suction chamber and having a suction port for communicating the suction chamber with a gas supply system; a first gas storage channel disposed in the cylinder body, the first gas storage channel having an inlet and an outlet, the inlet communicating with the gas supply system and the outlet communicating with the suction chamber; and a switching device disposed in the first gas storage channel for opening or closing the first gas storage channel; wherein, when the airflow pressure of the gas supply system is greater than the air pressure of the suction chamber, the switching device opens the first gas storage channel, and airflow enters the suction chamber through the first gas storage channel; when the airflow pressure of the gas supply system is less than the air pressure of the suction chamber, the switching device closes the first gas storage channel, and airflow enters the suction chamber through the suction port.

[0010] Optionally, the switching device includes: an intake valve, disposed at the intake port, for opening or closing the intake port to control the airflow to enter the first gas storage channel from the gas supply system through the intake port; wherein, when the airflow pressure of the gas supply system is greater than the gas pressure of the first gas storage channel, the intake valve opens and the airflow enters the first gas storage channel; when the airflow pressure is less than the gas pressure of the first gas storage channel, the intake valve closes.

[0011] Optionally, the switching device further includes: an air outlet valve, located at the air outlet, used to open or close the air outlet to control the airflow to enter the intake chamber through the first air storage channel via the air outlet; wherein, when the air pressure in the first air storage channel is greater than the air pressure in the intake chamber, the air outlet valve opens, and the airflow in the first air storage channel enters the intake chamber; when the air pressure in the first air storage channel is less than the air pressure in the intake chamber, the air outlet valve closes.

[0012] Optionally, the cylinder for the compressor further includes: a first limiting device located at the inlet, wherein the inlet valve includes a first valve plate, which opens or closes the inlet, and the first limiting device cooperates with the first valve plate to limit the opening degree of the first valve plate; and / or, a second limiting device located at the outlet, wherein the outlet valve includes a second valve plate, which opens or closes the outlet, and the second limiting device cooperates with the second valve plate to limit the opening degree of the second valve plate.

[0013] Optionally, the air inlet is located on the end face of the cylinder block along the axial direction; and / or, the air outlet is located on the end face of the cylinder block along the axial direction; and / or, the first air storage passage is located on the end face of the cylinder block along the axial direction.

[0014] Optionally, the cylinder block includes a first end face and a second end face along the axial direction, with the air inlet located on the first end face and the air outlet located on the second end face.

[0015] Optionally, the air outlet is located on the second end face, which is the lower end face of the cylinder block along the axial direction.

[0016] Optionally, the first gas storage passage extends circumferentially along the cylinder block.

[0017] Optionally, the cylinder further includes: a connecting channel disposed in the cylinder body, a first end of the connecting channel communicating with the air outlet, and a second end of the connecting channel extending radially toward the intake chamber of the cylinder body to communicate with the air outlet and the intake chamber; and / or, a second air storage channel disposed in the cylinder body, the second air storage channel communicating with the air outlet, and the air outlet communicating with the intake chamber through the second air storage channel.

[0018] Optionally, the air inlet is located on the side wall of the air intake.

[0019] Optionally, the intake port extends radially through the cylinder wall of the cylinder block.

[0020] Optionally, the inner diameter of the air inlet is less than or equal to the inner diameter of the air outlet; and / or, the end of the air inlet facing the air intake chamber is provided with an air inlet chamfer, and the air inlet is opened at the air inlet chamfer.

[0021] Optionally, the angle between the air outlet and the air intake along the circumference of the cylinder body ranges from 30° to 195°.

[0022] Optionally, the angle between the air outlet and the air intake along the circumference of the cylinder is 85°.

[0023] According to a second aspect of the present invention, a compressor is provided, comprising a cylinder for the compressor as described in any of the above embodiments.

[0024] The cylinder and compressor for a compressor provided in this disclosure can achieve the following technical effects:

[0025] Through dynamic control of the switching device, the cylinder can automatically adjust the airflow entry path based on the pressure difference between the airflow in the supply system and the suction chamber. When the airflow pressure in the supply system is greater than the suction chamber pressure, the switching device opens the first air storage channel to replenish the suction chamber. This replenishment of the suction chamber by the supply system's airflow through the first air storage channel reduces pressure fluctuations in the suction chamber, enabling the compressor to operate stably under different working conditions. This allows the variable frequency compressor to automatically adjust the suction pressure within the suction chamber at various frequencies, maintaining the suction pressure at its peak to meet the requirements for improved performance across the entire frequency range, thereby improving compressor capacity. It also reduces compressor vibration and noise caused by pressure fluctuations. When the airflow pressure in the supply system is less than the suction chamber pressure, the switching device closes the first air storage channel, achieving unidirectional control of the first air storage channel. This prevents backflow of airflow from the suction chamber through the first air storage channel, avoiding sudden changes in suction pulsation and improving the stability of suction airflow pulsation, thus increasing suction efficiency.

[0026] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0027] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0028] Figure 1 This is a schematic diagram of the structure of a cylinder for a compressor provided in an embodiment of this disclosure;

[0029] Figure 2 This is a schematic diagram of another cylinder for a compressor provided in an embodiment of this disclosure;

[0030] Figure 3 yes Figure 2 A schematic cross-sectional view along direction AA is shown.

[0031] Figure 4 This is a schematic diagram of another cylinder for a compressor provided in an embodiment of this disclosure;

[0032] Figure 5 yes Figure 4 An enlarged schematic diagram of part B is shown below;

[0033] Figure 6 This is a schematic diagram of the structure of another cylinder for a compressor provided in an embodiment of this disclosure;

[0034] Figure 7 This is an exploded schematic diagram of a cylinder for a compressor provided in an embodiment of this disclosure;

[0035] Figure 8 This is an exploded view of a pump assembly provided in an embodiment of this disclosure.

[0036] Figure label:

[0037] 10: Cylinder; 11: Cylinder body; 111: End face; 112: First end face; 113: Second end face; 114: Cylinder wall; 12: Intake chamber; 13: Intake port; 131: Side wall; 132: Intake port chamfer;

[0038] 20: First gas storage channel; 21: Air inlet; 22: Air outlet; 23: First section; 24: Second section; 25: First groove;

[0039] 30: Switching device; 31: Inlet valve; 311: First valve plate; 32: Outlet valve; 321: Second valve plate;

[0040] 40: First limiting device; 41: Second limiting device;

[0041] 50: Connection channel;

[0042] 60: Second gas storage channel; 61: Second groove;

[0043] 70: Screw;

[0044] 80: Pump body assembly; 81: Roller; 82: Main bearing; 83: Secondary bearing; 84: Crankshaft; 85: Silencing chamber. Detailed Implementation

[0045] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0046] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0047] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0048] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0049] Unless otherwise stated, the term "multiple" means two or more.

[0050] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0051] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0052] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0053] Combination Figures 1-7 As shown, this embodiment of the present disclosure provides a cylinder 10 for a compressor, the cylinder 10 including a cylinder body 11, a first air storage passage 20 and a switching device 30.

[0054] The cylinder body 11 defines an intake chamber 12 and has an intake port 13 for connecting the intake chamber 12 to the air supply system. A first air storage channel 20 is provided in the cylinder body 11, and the first air storage channel 20 has an inlet 21 and an outlet 22. The inlet 21 is connected to the air supply system, and the outlet 22 is connected to the intake chamber 12. A switching device 30 is provided in the first air storage channel 20 for opening or closing the first air storage channel 20. When the air pressure of the air supply system is greater than the air pressure of the intake chamber 12, the switching device 30 opens the first air storage channel 20, and the airflow enters the intake chamber 12 through the first air storage channel 20. When the air pressure of the air supply system is less than the air pressure of the intake chamber 12, the switching device 30 closes the first air storage channel 20, and the airflow enters the intake chamber 12 through the intake port 13.

[0055] Figures 1-2 and Figure 4 This is a structural schematic diagram with partial perspective of the cylinder 10 used in the compressor.

[0056] This embodiment provides two parallel airflow paths from the air supply system into the intake chamber 12. The airflow from the air supply system can directly enter the intake chamber 12 through the intake port 13 to complete the intake. Alternatively, the airflow from the air supply system can first enter the first air storage channel 20 through the air inlet 21 to achieve noise reduction and air storage functions, and then enter the intake chamber 12 through the air outlet 22 of the first air storage channel 20 to complete the air replenishment.

[0057] When the air pressure in the air supply system is greater than the air pressure in the air intake chamber 12, the switch device 30 opens the first air storage channel 20, allowing airflow to enter the air intake chamber 12 through the first air storage channel 20.

[0058] The operation of a compressor includes the intake phase, which will be explained using a rotary compressor as an example.

[0059] During the intake process, the intake port 13 is in the open state. When the air pressure of the air supply system is greater than the air pressure of the intake chamber 12, the switch device 30 opens the first air storage channel 20. At this time, part of the airflow enters the intake chamber 12 directly through the intake port 13, and part of the airflow enters the first air storage channel 20 through the air inlet 21. The airflow can enter the intake chamber 12 through the first air storage channel 20 to replenish the air.

[0060] At the moment the intake process ends, the compressor rollers close the intake port 13, forming a closed space in the intake chamber 12, and the airflow in the intake port 13 is blocked by the rollers. When the airflow pressure in the air supply system is greater than the air pressure in the intake chamber 12, the switching device 30 opens the first air storage channel 20. The airflow enters the first air storage channel 20 through the intake port 21, and then enters the intake chamber 12 from the first air storage channel 20, which can keep the air pressure in the intake chamber 12 at its peak and improve the stability of the intake pressure pulsation. Because the intake pressure pulsation during the compressor's intake process is improved, the compressor tends to be more stable during the intake process, reducing the vibration of the compressor during the intake process, thereby improving the noise of the compressor.

[0061] Based on the operating characteristics of the rotary compressor, the suction pressure pulsation can reach its peak at the moment suction ends. Therefore, at the moment suction ends, the airflow pressure of the air supply system is high enough to enable the switching device 30 to open the first air storage channel 20, thereby allowing airflow to flow into the first air storage channel 20 through the air inlet 21.

[0062] In this embodiment, the cylinder 10, with its intake port 13 and inlet port 21, is located on the cylinder body 11 and is connected to the air supply system, meaning that the air source for replenishment and intake is the same. This design simplifies the connection between the first air storage channel 20 and the air supply system, reducing the need for external pipes and connectors. Furthermore, the centralized layout of the intake port 13 and inlet port 21 helps enhance the stability of the compressor during operation.

[0063] The cylinder can draw air from the liquid receiver or directly from the compressor system. When the compressor is a rotary compressor, the air supply system includes a liquid receiver, and both the suction port 13 and the inlet port 21 are connected to the liquid receiver.

[0064] For example, the switching device 30 can be a lift check valve, a ball check valve, a one-way pneumatic control valve, or other one-way control device, which only allows the airflow to flow in one direction toward the first gas storage channel 20.

[0065] Using the cylinder 10 for the compressor provided in this embodiment, the cylinder 10 can automatically adjust the airflow entry path according to the pressure difference between the airflow pressure of the air supply system and the air pressure of the suction chamber 12 through the dynamic control of the switching device 30. When the airflow pressure of the air supply system is greater than the air pressure of the suction chamber 12, the switching device 30 opens the first air storage channel 20 to replenish the suction chamber 12. The airflow of the air supply system replenishes the suction chamber 12 through the first air storage channel 20, which can reduce the air pressure fluctuation of the suction chamber 12, enabling the compressor to operate stably under different working conditions. This allows the variable frequency compressor to automatically adjust the suction pressure in the suction chamber 12 at each frequency, keeping the air pressure in the suction chamber 12 at its peak, meeting the requirements for improving the full-frequency capability of the variable frequency compressor, thereby improving the compressor's capability. At the same time, it can also reduce compressor vibration and noise caused by pressure fluctuations. When the air pressure in the air supply system is less than the air pressure in the air intake chamber 12, the switch device 30 closes the first air storage channel 20, thereby realizing the one-way control of the first air storage channel 20 by the switch device 30. This can prevent the airflow in the air intake chamber 12 from flowing back through the first air storage channel 20 and causing sudden changes in the air intake pulsation, thereby improving the stability of the air intake pulsation and increasing the air intake efficiency.

[0066] Optionally, combined Figure 2 and Figure 4 As shown, the intake port 13 penetrates the cylinder wall 114 of the cylinder block 11 radially.

[0067] The intake port 13 is radially disposed through the cylinder wall 114 of the cylinder body 11, allowing direct intake of gas from the air supply system. This reduces the distance and direction of gas flow, thereby reducing pressure loss. The radial intake port 13 allows the airflow to enter the intake chamber 12 more smoothly, reducing pressure pulsations during intake. It also allows for more efficient use of the space in the cylinder 10.

[0068] Optionally, combined Figure 6 As shown, the air inlet 21 is located on the side wall 131 of the air intake 13.

[0069] The air inlet 21 is located on the side wall 131 of the intake port 13. At the moment the roller closes the intake port 13 at the end of the intake process, the airflow blocked within the side wall 131 of the intake port 13 can more quickly enter the first air storage channel 20 along the air inlet 21, preventing airflow backflow from the intake port 13 and improving the stability of the intake airflow pulsation. Simultaneously, it also avoids noise caused by airflow backflow.

[0070] Optionally, combined Figure 7As shown, the switching device 30 includes an air inlet valve 31, which is located at the air inlet 21 and is used to open or close the air inlet 21 to control the airflow to enter the first air storage channel 20 from the air supply system through the air inlet 21. When the airflow pressure of the air supply system is greater than the air pressure of the first air storage channel 20, the air inlet valve 31 is opened and the airflow enters the first air storage channel 20. When the airflow pressure is less than the air pressure of the first air storage channel 20, the air inlet valve 31 is closed.

[0071] The air inlet 21 marks the beginning of the first air storage channel 20. An air inlet valve 31 is installed at the air inlet 21, enabling opening and closing control at the beginning of the first air storage channel 20 and improving the response speed of the air inlet valve 31 to the opening or closing of the first air storage channel 20. Airflow is only allowed into the first air storage channel 20 when the pressure of the air supply system is greater than the pressure of the first air storage channel 20, allowing for precise control of airflow into the first air storage channel 20 and thus avoiding energy loss.

[0072] Meanwhile, an intake valve 31 is installed at the intake port 21, which can control the unidirectional flow of air at the beginning of the first air storage channel 20, better prevent the airflow from flowing back through the first air storage channel 20, thereby improving the stability of the intake airflow pulsation.

[0073] When the airflow enters the first gas storage channel 20, the gas can be temporarily stored in the first gas storage channel 20 after the intake valve 31 closes the intake port 21, which can balance the pressure and flow requirements of the compressor at different working stages.

[0074] Optionally, combined Figure 7 As shown, the switching device 30 also includes an air outlet valve 32, which is located at the air outlet 22 and is used to open or close the air outlet 22 to control the airflow to enter the intake chamber 12 through the first air storage channel 20 via the air outlet 22. When the air pressure in the first air storage channel 20 is greater than the air pressure in the intake chamber 12, the air outlet valve 32 is opened, and the airflow in the first air storage channel 20 enters the intake chamber 12. When the air pressure in the first air storage channel 20 is less than the air pressure in the intake chamber 12, the air outlet valve 32 is closed.

[0075] The exhaust valve 32 enhances the gas storage efficiency of the first gas storage channel 20. By installing an intake valve 31 and an exhaust valve 32 at the intake port 21 and exhaust port 22 of the first gas storage channel 20, airflow can be stored more effectively within the channel. When replenishment is needed in the intake chamber 12, the airflow stored in the first gas storage channel 20 can promptly enter the chamber, replenishing the pressure and maintaining it at its peak. Before exhaust, when the pressure in the intake chamber 12 is low, the gas stored in the first gas storage channel 20 can replenish it. Utilizing the pressure fluctuations of the intake pressure pulsation, the intake valve 31 and exhaust valve 32 automatically open and close, achieving adjustable intake airflow pulsation and stabilizing the pressure in the intake chamber 12.

[0076] When the air pressure in the first air storage channel 20 is greater than the air pressure in the intake chamber 12, the outlet valve 32 opens, allowing airflow from the first air storage channel 20 to enter the intake chamber 12 and replenish it with air. When the air pressure in the first air storage channel 20 is less than the air pressure in the intake chamber 12, the outlet valve 32 closes, preventing airflow from flowing back from the intake chamber 12 into the first air storage channel 20.

[0077] For example, when the airflow pressure of the air supply system is less than the air pressure in the intake chamber 12, the intake valve 31 is closed. When the airflow pressure of the air supply system is greater than the air pressure in the intake chamber 12, the intake valve 31 is opened, and the high-pressure airflow enters the first air storage channel 20 through the intake port 21, where it is stored between the intake valve 31 and the outlet valve. When the air pressure in the intake chamber 12 is lower than the air pressure in the first air storage channel 20, the outlet valve 32 is opened, and the high-pressure airflow stored in the first air storage channel 20 enters the intake chamber 12 through the outlet port 22. This increases the airflow pressure in the intake chamber 12, maintaining it at its peak value. When the air pressure in the intake chamber 12 is greater than the air pressure in the first air storage channel 20, the outlet valve 32 is closed. By employing the above methods, the pressure fluctuation within the suction chamber 12 can be reduced, causing the suction pulsation during the suction process to shift from an unsteady state to a steady state. This ensures that the pressure within the suction chamber 12 remains at its maximum at the end of the suction process, achieving optimal compressor performance at all frequencies. Because the suction pulsation during the compressor's suction process is improved, the compressor becomes more stable during suction, reducing vibration and thus improving compressor noise.

[0078] By controlling the opening degree of the inlet valve 31 and the outlet valve 32, the gas flow rate entering and exiting the first gas storage channel 20 can be precisely controlled to meet the needs of the compressor's working cycle.

[0079] Optionally, combined Figures 7-8As shown, the cylinder 10 for the compressor also includes a first limiting device 40, which is located at the air inlet 21. The air inlet valve 31 includes a first valve plate 311, which opens or closes the air inlet 21. The first limiting device 40 cooperates with the first valve plate 311 to limit the opening degree of the first valve plate 311.

[0080] The first limiting device 40 can limit the opening degree of the first valve plate 311, that is, limit the maximum stroke of the first valve plate 311 from the first closed position of the closed air inlet 21 to the first open position of the open air inlet 21.

[0081] By setting the first limiting device 40, the first valve plate 311 is opened to a certain height, which can prevent excessive air intake into the first air storage channel 20 due to the first valve plate 311 opening too large, and also prevent insufficient air intake into the first air storage channel 20 due to the first valve plate 311 opening too small. By limiting the opening degree of the first valve plate 311 by the first limiting device 40, the airflow impact caused by the first valve plate 311 opening too large can also be reduced, thus reducing pressure fluctuations and noise. At the same time, it can also prevent the first valve plate 311 from being damaged due to excessive movement, extending the service life of the intake valve 31.

[0082] Optionally, the first limiting device 40 is a first lift limiter.

[0083] The first lift limiter can precisely limit the lift of the first valve plate 311, improving the repeatability of the first valve plate 311. The first valve plate 311 and the first lift limiter can be fastened together with screws 70.

[0084] Optionally, combined Figures 7-8 As shown, the cylinder 10 for the compressor also includes a second limiting device 41, which is located at the outlet 22. The outlet valve 32 includes a second valve plate 321, which opens or closes the outlet 22. The second limiting device 41 cooperates with the second valve plate 321 to limit the opening degree of the second valve plate 321.

[0085] The second limiting device 41 can limit the opening degree of the second valve plate 321, that is, limit the maximum stroke of the second valve plate 321 from the second closed position of closing the air outlet 22 to the second open position of opening the air inlet 21.

[0086] By setting the second limiting device 41, the second valve plate 321 is opened to a certain height, which can prevent excessive air intake into the intake chamber 12 due to the second valve plate 321 opening too large, and also prevent insufficient air intake into the intake chamber 12 due to the second valve plate 321 opening too small. By limiting the opening degree of the second valve plate 321 by the second limiting device 41, the airflow impact caused by the second valve plate 321 opening too large can also be reduced, thus reducing pressure fluctuations and noise. At the same time, it can also prevent the second valve plate 321 from being damaged due to excessive movement, thus extending the service life of the exhaust valve 32.

[0087] Optionally, the second limiting device 41 is a second lift limiter.

[0088] The second lift limiter can precisely limit the lift of the second valve plate 321, improving the repeatability of the second valve plate 321. The second valve plate 321 and the second lift limiter can be fastened with screws 70.

[0089] Optionally, combined Figures 1-2 and Figure 7 As shown, the air intake 21 is located on the axial end face 111 of the cylinder block 11; and / or, in combination with Figures 4-5 As shown, the air outlet 22 is located on the axial end face 111 of the cylinder block 11; and / or, combined with Figures 1-2 and Figures 6-7 As shown, the first air storage channel 20 is located on the end face 111 of the cylinder body 11 along the axial direction.

[0090] The air inlet 21, air outlet 22, or first air storage channel 20 are located on the axial end face 111 of the cylinder block 11, which facilitates processing and reduces manufacturing difficulty.

[0091] When the air inlet 21 is located on the end face 111 along the axial direction of the cylinder 11, the end face 111 is also provided with a first clearance groove to make way for the air inlet valve 31 and the first limiting device 40. When the air outlet 22 is located on the end face 111 along the axial direction of the cylinder 11, the end face 111 is also provided with a second clearance groove to make way for the air outlet valve 32 and the second limiting device 41.

[0092] Optionally, combined Figures 1-4 As shown, the cylinder block 11 includes a first end face 112 and a second end face 113 along the axial direction, with an air inlet 21 located on the first end face 112 and an air outlet 22 located on the second end face 113.

[0093] The air inlet 21 and air outlet 22 of the first air storage channel 20 are respectively located on the first end face 112 and the second end face 113 of the cylinder body 11 along the axial direction, which enables the first air storage channel 20 to effectively store gas.

[0094] With the air inlet 21 located on the first end face 112 and the air outlet 22 located on the second end face 113, the first air storage channel 20 includes a first section 23 and a second section 24. The first section 23 is located on the first end face 112, the air inlet 21 is located at one end of the first section 23, the other end of the first section 23 is connected to one end of the second section 24, the second section 24 passes through the cylinder body 11 along the axial direction of the cylinder body 11, and the air outlet 22 is located at the other end of the second section 24.

[0095] The first end face 112 can be the upper end face and the second end face 113 can be the lower end face. Alternatively, the first end face 112 can be the lower end face and the second end face 113 can be the upper end face. This application takes the first end face 112 as the upper end face and the second end face 113 as the lower end face as an example.

[0096] Optionally, the air outlet 22 is located on the second end face 113, which is the lower end face of the cylinder block 11 along the axial direction.

[0097] During the operation of the compressor, gas is compressed in the compression chamber of cylinder 11, resulting in uneven pressure distribution along the axial direction of cylinder 11. The pressure at the lower end of cylinder 11 is relatively low, while the pressure at the upper end of cylinder 11 is relatively high due to gas compression. By placing the outlet 22 on the lower end face of cylinder 11 along the axial direction, the airflow in the first gas storage channel 20 flows into the intake chamber 12 from the lower end face of cylinder 11. Because the pressure at the lower end face is lower, this increases the gas output, allowing more gas to enter the intake chamber 12, thereby improving the gas replenishment effect.

[0098] When the first air storage passage 20 is located on the axial end face 111 of the cylinder body 11, the first air storage passage 20 includes a first groove 25 recessed into the end face 111. After the cylinder 10 is assembled with the bearing, a seal is formed between the axial end face 111 of the cylinder body 11 and the bearing, allowing airflow to be stored in the first groove 25. The first air storage passage 20 can extend circumferentially along the cylinder body 11.

[0099] The first gas storage channel 20 can be located on the upper or lower end face. When the first gas storage channel 20 is located on the upper end face, since the upper end face usually has an exhaust chamfer, the opening of the first gas storage channel 20 needs to make way for the exhaust chamfer.

[0100] This application uses an example where the air inlet 21 is located on the upper end face of the cylinder 11 along the axial direction, and the air outlet 22 is located on the lower end face of the cylinder 11 along the axial direction. The first air storage channel 20 includes a first section 23 and a second section 24. The first section 23 is located on the upper end face, with its first end extending circumferentially along the cylinder 11. The air inlet 21 is located at one end of the first section 23, and the other end of the first section 23 is connected to one end of the second section 24. The second section 24 extends through the cylinder 11 along the axial direction, and the air outlet 22 is located at the other end of the second section 24. The first section 23 and the second section 24 of the first air storage channel 20 ensure the continuity of airflow. The air inlet 21 is located on the upper end face of the cylinder 11 along the axial direction, and the air outlet 22 is located on the lower end face of the cylinder 11 along the axial direction. This utilizes the pressure gradient from top to bottom of the cylinder 11 to promote the flow of gas from the high-pressure area to the low-pressure area, increasing the output volume, extending the replenishment time, and thus improving the compressor capacity.

[0101] Optionally, combined Figure 5 As shown, the cylinder 10 also includes a connecting channel 50, which is located in the cylinder body 11. The first end of the connecting channel 50 is connected to the air outlet 22, and the second end of the connecting channel 50 extends radially toward the air intake chamber 12 along the cylinder body 11 to connect the air outlet 22 and the air intake chamber 12.

[0102] A connecting channel 50 is provided between the air outlet 22 and the intake chamber 12 to better guide airflow into the intake chamber 12. When the air outlet 22 is located on the axial end face 111 of the cylinder body 11, the connecting channel 50 is also located on the same axial end face 111 of the cylinder body 11. The first end of the connecting channel 50 connects to the air outlet 22, and the second end of the connecting channel 50 extends radially towards the intake chamber 12 along the cylinder body 11, simplifying the airflow path and reducing flow resistance.

[0103] Optionally, combined Figures 4-5 As shown, the cylinder 10 also includes a second air storage channel 60, which is located in the cylinder body 11. The second air storage channel 60 is connected to the air outlet 22, and the air outlet 22 is connected to the air intake chamber 12 through the second air storage channel 60.

[0104] A second gas storage channel 60 is provided at the gas outlet 22, providing additional gas storage space to temporarily store the gas after it flows out of the first gas storage channel 20. The second gas storage channel 60 can also act as a buffer, absorbing some of the pressure shock when the gas flows out of the first gas storage channel 20, thus reducing airflow pressure fluctuations.

[0105] When the air outlet 22 is located on the axial end face 111 of the cylinder body 11, the second air storage channel 60 is also located on the axial end face 111 of the cylinder body 11. The second air storage channel 60 includes a second groove 61 recessed into the end face 111. After the cylinder 10 is assembled with the bearing, a seal is formed between the axial end face 111 of the cylinder body 11 and the bearing, allowing airflow to be stored in the second groove 61. The second air storage channel 60 can extend circumferentially along the cylinder body 11.

[0106] Optionally, the inner diameter of the air inlet 21 is less than or equal to the inner diameter of the air outlet 22.

[0107] The inner diameter of the air inlet 21 is less than or equal to the inner diameter of the air outlet 22, so that the pressure at the air inlet 21 end of the first air storage channel 20 is greater than the pressure at the air outlet 22 end. This reduces the flow resistance of the airflow, allowing the airflow in the first air storage channel 20 to flow more smoothly out of the air outlet 22, thus improving the flow efficiency of the airflow. At the same time, it also prevents the airflow from flowing back.

[0108] Optionally, combined Figure 6 As shown, the end of the air inlet 13 facing the air inlet 12 is provided with a chamfer, and the air inlet 21 is opened at the chamfer of the air inlet 13.

[0109] The chamfered design of the intake port 13 creates a smooth transition, reducing intake resistance, minimizing direct airflow impact on the inner wall of the cylinder block 11, and reducing turbulence and eddies. The intake port 21, located at the chamfer of the intake port 13, allows for smoother airflow into the first air storage channel 20, improving intake efficiency and gas filling speed. It also reduces pressure loss when airflow enters the first air storage channel 20.

[0110] Optionally, the angle between the air outlet 22 and the air intake 13 along the circumference of the cylinder body 11 ranges from 30° to 195°.

[0111] The angle between the exhaust port 22 and the intake port 13 along the circumference of the cylinder block 11 is as follows: Figure 2 As shown in α.

[0112] The cylinder body 11 defines the inner cavity of the cylinder 10. During different working stages of the compressor, the inner cavity of the cylinder 10 is divided into the intake chamber 12, the compression chamber, and the exhaust chamber.

[0113] When the angle between the air outlet 22 and the air intake 13 along the circumference of the cylinder body 11 is greater than or equal to 30°, the air outlet 22 is located within the effective range of the air intake chamber 12. This prevents the rollers from passing the air outlet 22 before the air replenishment is completed, allowing the airflow to smoothly enter the air intake chamber 12 after exiting the air outlet 22. It also prevents the airflow exiting the air outlet 22 from directly impacting the air intake 13, reducing airflow interference and turbulence, and improving the airflow stability in the air intake chamber 12.

[0114] When the angle between the exhaust port 22 and the intake port 13 along the circumference of the cylinder block 11 is less than or equal to 195°, the exhaust port 22 is within the effective range of the intake chamber 12. The exhaust port 22 and the intake chamber 12 are continuously connected to prevent the position of the exhaust port 22 from exceeding the range of the intake chamber 12 and to prevent the airflow from flowing out of the exhaust port 22 and directly entering the exhaust process.

[0115] In this embodiment, the angle between the air outlet 22 and the air intake 13 along the circumference of the cylinder body 11 is limited to greater than or equal to 30° and less than or equal to 195°. This ensures that the air outlet 22 is within the effective range of the air intake chamber 12 and also improves the airflow stability in the air intake chamber 12, enabling the first air storage channel 20 to better achieve the air replenishment effect.

[0116] It is understandable that the angle between the air outlet 22 and the air intake 13 along the circumference of the cylinder body 11 can be 30°, 55°, 85°, 110°, 135°, 160°, 195°, etc.

[0117] Optionally, the angle between the air outlet 22 and the air intake 13 along the circumference of the cylinder 11 is 85°.

[0118] When the angle between the air outlet 22 and the air intake 13 along the circumference of the cylinder body 11 is 85°, the airflow of the first air storage channel 20 can flow more directly and smoothly from the air outlet 22 into the air intake chamber 12, which can improve the air supply efficiency and the airflow stability in the air intake chamber 12, thereby improving the air supply effect.

[0119] This disclosure provides a compressor, including a cylinder 10 for the compressor as described in any of the above embodiments.

[0120] The compressor provided in this embodiment includes the cylinder 10 for compressor as described in any of the above-described embodiments, and therefore has all the beneficial effects of the cylinder 10 for compressor as described in any of the above-described embodiments. This satisfies the requirement for improved performance across the entire frequency band of variable frequency compression, reduces compressor vibration and noise caused by pressure fluctuations, and also improves the stability of intake airflow pulsation and increases intake efficiency.

[0121] Optionally, the compressor also includes a main bearing 82, and the first air storage channel 20 includes a first groove 25. The first groove 25 is located on the upper end face of the cylinder 11 along the axial direction, and the main bearing 82 is in contact with the upper end face so that a sealed first air storage space is formed between the first groove 25 and the ground surface of the main bearing.

[0122] A first, sealed gas storage space is constructed by providing a first groove 25 along the axial upper end face of the cylinder 11, which fits into the main bearing. This enables the first gas storage channel 20 to function as a gas storage channel, improving gas storage efficiency. Simultaneously, this design optimizes the space utilization of the cylinder 10 and facilitates manufacturing.

[0123] Optionally, the compressor also includes a secondary bearing 83, and the second air storage channel 60 includes a second groove 61. The second groove 61 is located on the lower end face of the cylinder 11 along the axial direction, and the secondary bearing 83 is in contact with the lower end face so that a sealed second air storage space is formed between the second groove 61 and the surface of the secondary bearing.

[0124] A second, sealed gas storage space is constructed by providing a second groove 61 along the lower end face of the cylinder 11 along the axial direction, which fits into the auxiliary bearing. This enables the second gas storage channel 60 to function as a gas storage channel, improving gas storage efficiency. Simultaneously, this design optimizes the space utilization of the cylinder 10 and facilitates manufacturing.

[0125] like Figure 8 As shown, the compressor includes a pump body assembly 80, which includes a cylinder 10 for the compressor as described in any of the above embodiments, and further includes rollers 81, a main bearing 82, a secondary bearing 83, a crankshaft 84, and a muffler 85. The rollers 81 are disposed within the cylinder body 11 of the cylinder 10. The crankshaft 84 passes through the muffler 85, the main bearing 82, the cylinder 10, the rollers 81, and the secondary bearing 83 sequentially from top to bottom along the axial direction. The muffler 85 is connected to the main bearing 82 and the cylinder 10 by screws 70. The auxiliary bearing 83 is fixed to the cylinder 10 by screws 70; wherein, the first end face 112 of the cylinder body 11 is in contact with the main bearing 82, and the second end face 112 of the cylinder body 11 is in contact with the auxiliary bearing 83; the first air storage channel 20 includes a first groove 25 extending circumferentially along the cylinder body 11, the first groove 25 is provided on the first end face 112; the air inlet 21 is provided on the first end face 112 of the cylinder body 11 along the axial direction; the air outlet 22 is provided on the second end face 113 of the cylinder body 11 along the axial direction.

[0126] The first end face 112 of the cylinder body 11 is in contact with the main bearing 82, forming a seal between the first groove 25 and the main bearing 82, allowing airflow to be stored in the first groove 25. This satisfies the requirements for improved performance across the entire frequency band of variable frequency compression, reduces compressor vibration and noise caused by pressure fluctuations, and also improves the stability of intake airflow pulsation and increases intake efficiency.

[0127] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A cylinder for a compressor, characterized by, The cylinder comprises: a cylinder body defining an air suction chamber and provided with an air suction port for connecting the air suction chamber with a gas supply system; a first gas storage passage provided in the cylinder body and provided with an air inlet port and an air outlet port, the air inlet port being connected with the gas supply system and the air outlet port being connected with the air suction chamber; a switching device provided in the first gas storage passage and used for opening or closing the first gas storage passage; wherein when the gas flow pressure of the gas supply system is greater than the air pressure of the air suction chamber, the switching device opens the first gas storage passage, and the gas flow enters the air suction chamber through the first gas storage passage; and when the gas flow pressure of the gas supply system is less than the air pressure of the air suction chamber, the switching device closes the first gas storage passage, and the gas flow enters the air suction chamber through the air suction port.

2. The cylinder for a compressor according to claim 1, characterized in that, The switching device comprises: an air inlet valve provided in the air inlet port and used for opening or closing the air inlet port to control the gas flow entering the first gas storage passage from the gas supply system through the air inlet port; wherein when the gas flow pressure of the gas supply system is greater than the air pressure of the first gas storage passage, the air inlet valve is opened, and the gas flow enters the first gas storage passage; and when the gas flow pressure is less than the air pressure of the first gas storage passage, the air inlet valve is closed.

3. The cylinder for a compressor according to claim 2, characterized in that, The switching device further comprises: an air outlet valve provided in the air outlet port and used for opening or closing the air outlet port to control the gas flow entering the air suction chamber from the first gas storage passage through the air outlet port; wherein when the air pressure of the first gas storage passage is greater than the air pressure of the air suction chamber, the air outlet valve is opened, and the gas flow in the first gas storage passage enters the air suction chamber; and when the air pressure of the first gas storage passage is less than the air pressure of the air suction chamber, the air outlet valve is closed.

4. The cylinder for a compressor according to claim 3, characterized in that, Further comprising: a first limiting device provided in the air inlet port, the air inlet valve comprising a first valve plate for opening or closing the air inlet port, and the first limiting device cooperating with the first valve plate to limit the opening degree of the first valve plate; and / or a second limiting device provided in the air outlet port, the air outlet valve comprising a second valve plate for opening or closing the air outlet port, and the second limiting device cooperating with the second valve plate to limit the opening degree of the second valve plate.

5. The cylinder for a compressor according to claim 1, wherein: the air inlet port is provided on an axial end surface of the cylinder body; and / or the air outlet port is provided on an axial end surface of the cylinder body; and / or the first gas storage passage is provided on an axial end surface of the cylinder body.

6. The cylinder for a compressor according to any one of claims 1 to 5, characterized in that, The cylinder further comprises: a connecting passage provided in the cylinder body, a first end of the connecting passage being connected with the air outlet port, and a second end of the connecting passage extending towards the air suction chamber along a radial direction of the cylinder body to connect the air outlet port with the air suction chamber; and / or a second gas storage passage provided in the cylinder body, the second gas storage passage being connected with the air outlet port, and the air outlet port being connected with the air suction chamber through the second gas storage passage.

7. The cylinder for a compressor according to any one of claims 1 to 5, wherein: an inner diameter of the air inlet port is less than or equal to an inner diameter of the air outlet port; and / or an end of the air suction port facing the air suction chamber is provided with an air suction port chamfer, and the air inlet port is provided in the air suction port chamfer.

8. The cylinder for a compressor according to any one of claims 1 to 5, wherein: an angle range between the air outlet port and the air suction port along a circumferential direction of the cylinder body is 30° to 195°.

9. The cylinder for a compressor according to claim 8, wherein: the angle between the air outlet port and the air suction port along the circumferential direction of the cylinder body is 85°.

10. A compressor characterized by, A cylinder for a compressor comprising any one of claims 1 to 9.

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