Exhaust valve of rolling rotor compressor

Abstract

In the rolling rotor compressor exhaust valve, an exhaust valve shell is fixedly installed on a compressor end cover, an exhaust piston is arranged in a cylinder body cavity in a sliding mode, one end of the exhaust piston doing reciprocating rectilinear motion in the axial direction is provided with a sealing face used for sealing an air inlet of the exhaust valve, and the other end of the exhaust piston is a driven end face. The elastic reset element is arranged in the cylinder body cavity and applies bias force towards the closing position to the exhaust piston. The active driving component is rotatably supported in the exhaust valve shell, the rotation axis of the active driving component is parallel to or coaxial with the compressor spindle, the active driving component is connected with the compressor spindle through a transmission structure, and the active driving component is provided with a cam profile which is in contact with the driven end face of the exhaust piston. The elastic reset element is used for pushing the exhaust piston to overcome the bias force of the elastic reset element and the gas pressure to open the exhaust valve air inlet when the compressor operates to the exhaust phase, and is separated from the contact when the compressor is in the non-exhaust phase, so that the exhaust piston is reset to close the exhaust valve air inlet under the action of the elastic reset element.

Description

Technical Field

[0001] This invention relates to the field of rolling rotor compressor technology, and in particular to a rolling rotor compressor exhaust valve. Background Technology

[0002] A rotary compressor is a machine that uses an internal eccentric shaft to drive a rotor to achieve a periodic intake, compression, and exhaust process. With the development of precision machining technology, it has become increasingly sophisticated and is widely used in room air conditioning and small commercial refrigeration equipment, serving as the heart of the system to provide power for the working fluid circulation. Among the components of a rotary compressor, the exhaust valve plays a crucial role in exhausting air. Currently used rotary compressor exhaust valves mostly employ a valve plate structure. This structure achieves the exhaust process by the valve plate repeatedly bending and rebounding as the rotary compressor runs. However, high-speed operation can cause the valve plate to break easily, resulting in poor reliability and high noise levels, adversely affecting the overall performance of the rotary compressor. The inherent technical defects of traditional pneumatic exhaust valves (such as reed valves) in existing rolling rotor compressors are as follows: Specifically, the opening and closing of such pneumatic valves relies entirely on the instantaneous pressure difference between the compression and exhaust chambers. Under high speeds, variable operating conditions (especially variable frequency operation), or drastic system pressure fluctuations, a series of problems easily arise: First, the valve's opening and closing response is delayed, leading to untimely opening, increased compression power consumption, and incomplete closing, causing high-pressure gas backflow, severely reducing the compressor's volumetric efficiency and energy efficiency. Second, the valve plate generates additional noise and accelerates material fatigue under high-frequency airflow excitation, ultimately leading to valve plate breakage and complete compressor failure. Therefore, this invention aims to provide a forced-drive exhaust mechanism with precise opening and closing timing, stable and reliable operation, and fundamentally eliminates dependence on gas pressure difference.

[0003] The information disclosed in the background section is only intended to enhance the understanding of the background of the present invention, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] To address the shortcomings or defects of the existing technology, a rolling rotor compressor exhaust valve is provided, which constructs a cam-piston mechanism that is strictly synchronized with the rotation phase of the compressor main shaft. The opening and closing actions of the exhaust valve are directly and forcibly controlled by the profile of the cam, thereby achieving precise matching between the exhaust process and the compressor working cycle.

[0005] The objective of this invention is achieved through the following technical solutions.

[0006] A rolling rotor compressor exhaust valve includes,

[0007] An exhaust valve housing is fixedly installed on the compressor end cover. The exhaust valve housing has a cylinder chamber and an exhaust valve inlet that communicates with the high-pressure exhaust passage of the compressor cylinder.

[0008] An exhaust piston is slidably disposed in the cylinder chamber and reciprocates linearly along the axial direction. One end of the exhaust piston is provided with a sealing surface for sealing the air inlet of the exhaust valve, and the other end is a driven end face.

[0009] An elastic reset element, disposed in the cylinder chamber, applies a biasing force toward the closed position to the exhaust piston;

[0010] An active drive component is rotatably supported within the exhaust valve housing. Its rotation axis is parallel or coaxial with the compressor main shaft and connected to the compressor main shaft via a transmission structure. The active drive component has a cam profile that maintains contact with the driven end face of the exhaust piston. It is used to push the exhaust piston to overcome the biasing force of the elastic reset element and the gas pressure to open the exhaust valve inlet when the compressor is running to the exhaust phase, and to disengage from the contact when not in the exhaust phase, so that the exhaust piston is reset and closes the exhaust valve inlet under the action of the elastic reset element.

[0011] In the aforementioned rolling rotor compressor exhaust valve, the exhaust valve housing is provided with multiple mounting holes. The position, number, and diameter of the mounting holes match the threaded through holes on the compressor end cover. The exhaust valve housing is installed on the compressor end cover using fasteners.

[0012] In the aforementioned rolling rotor compressor exhaust valve, the cylinder chamber includes a guide hole for providing axial guidance and limiting of the reciprocating motion of the exhaust piston.

[0013] In the aforementioned rolling rotor compressor exhaust valve, the elastic reset element is a tension spring, one end of which is fixed to the inner wall of the exhaust valve housing, and the other end is connected to the exhaust piston.

[0014] In the aforementioned rolling rotor compressor exhaust valve, the active drive component includes a camshaft, the cam profile of which includes a base circle portion and a protruding portion; when the base circle portion of the camshaft contacts the exhaust piston, the exhaust piston is in a closed state; when the protruding portion rotates to contact the exhaust piston, it pushes the exhaust piston to open the exhaust valve inlet.

[0015] In the aforementioned rolling rotor compressor exhaust valve, the cam profile of the camshaft is designed according to the working phase of the compressor main shaft, so that the exhaust opening time is synchronized with the time when the compression chamber reaches the exhaust pressure.

[0016] In the aforementioned rolling rotor compressor exhaust valve, the sealing surface of the exhaust piston and the valve seat formed around the air inlet of the exhaust valve constitute a metal-metal or metal-elastomer sealing pair to ensure airtightness in the closed state.

[0017] In the aforementioned rolling rotor compressor exhaust valve, the exhaust valve housing is detachably connected to the compressor end cover.

[0018] In the aforementioned rolling rotor compressor exhaust valve, the rolling rotor compressor exhaust valve is integrated into the end cover of the rolling rotor compressor.

[0019] In the aforementioned rotary compressor exhaust valve, the exhaust valve housing is a cylindrical structure.

[0020] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention, through the rigid synchronous drive of the camshaft and the compressor main shaft, ensures that the opening and closing actions of the exhaust valve strictly correspond to the working phase of the compressor. This fundamentally eliminates the opening and closing delays or advances caused by back pressure fluctuations in traditional pneumatic valves, ensuring optimal exhaust timing and achieving precise forced timing control. Replacing the easily fatigued and fractured flexible spring with a rigidly driven piston valve core completely avoids problems such as valve plate chatter and slapping under high-frequency excitation, resulting in a more robust structure, especially suitable for the operating requirements of high-speed and variable-frequency compressors, significantly improving reliability and durability under high-speed conditions. The forced and rapid opening and closing action ensures the rapid opening and tight closure of the exhaust passage, effectively reducing leakage losses of high-pressure gas and re-expansion losses of clearance volume, thereby helping to improve the volumetric efficiency and overall energy efficiency of the compressor, and improving the compressor's performance indicators. The entire mechanism is designed as an independent module, which can be directly installed and fixed through the existing through holes on the compressor end cover. The structure is compact and does not require large-scale modifications to the compressor body. It facilitates production assembly, maintenance and replacement, as well as performance upgrades of existing products, providing a convenient modular integration solution.

[0021] The description provided is merely an overview of the technical solution of this invention. In order to make the technical means of this invention clearer and more understandable, so that those skilled in the art can implement it according to the contents of the specification, and to make the described and other objects, features and advantages of this invention more obvious and understandable, specific embodiments of this invention are described below. Attached Figure Description

[0022] Various other advantages and benefits of the present invention will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0023] In the attached diagram:

[0024] Fig. 1 This is a schematic diagram of the bottom structure of the exhaust valve of a rolling rotor compressor according to the present invention;

[0025] Fig. 2 This is a schematic diagram of the top structure of the exhaust valve of a rolling rotor compressor according to the present invention;

[0026] Fig. 3 This is a top view of the exhaust valve of a rolling rotor compressor according to the present invention, showing the state before exhaust.

[0027] Fig. 4 This is a top view of the exhaust valve of a rolling rotor compressor according to the present invention, and a schematic diagram of the exhaust state.

[0028] The present invention will be further explained below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0029] Specific embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While specific embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0030] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that different terms may be used to refer to the same component. This specification and claims do not distinguish components based on differences in terminology, but rather on differences in function. The terms "comprising" or "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising but not limited to." The following descriptions are preferred embodiments for carrying out the invention; however, these descriptions are for the purpose of understanding the general principles of the specification and are not intended to limit the scope of the invention. The scope of protection of this invention is determined by the appended claims.

[0031] To facilitate understanding of the embodiments of the present invention, the following will provide further explanation and description with reference to the accompanying drawings and several specific embodiments, and the accompanying drawings do not constitute a limitation on the embodiments of the present invention.

[0032] To better understand, such as Figs. 1 to 4 As shown, a rolling rotor compressor exhaust valve includes,

[0033] The exhaust valve housing 1 is fixedly installed on the compressor end cover 2. The exhaust valve housing 1 has a cylinder chamber and an exhaust valve inlet 5 that is connected to the high-pressure exhaust channel of the compressor cylinder.

[0034] The exhaust piston 6 is slidably disposed in the cylinder chamber and reciprocates linearly along the axial direction. One end of the exhaust piston 6 is provided with a sealing surface for sealing the exhaust valve inlet 5, and the other end is a driven end face.

[0035] The elastic reset element 7 is disposed in the cylinder chamber and applies a biasing force toward the closed position to the exhaust piston 6;

[0036] An active drive component 4 is rotatably supported within the exhaust valve housing 1. Its rotation axis is parallel or coaxial with the compressor main shaft and is connected to the compressor main shaft via a transmission structure. The active drive component 4 has a cam profile that maintains contact with the driven end face of the exhaust piston 6. When the compressor is running to the exhaust phase, the cam profile pushes the exhaust piston 6 to overcome the biasing force of the elastic reset element 7 and the gas pressure to open the exhaust valve inlet 5. When the compressor is not in the exhaust phase, the cam profile disengages from the contact, allowing the exhaust piston 6 to reset and close the exhaust valve inlet 5 under the action of the elastic reset element 7.

[0037] In a preferred embodiment of the exhaust valve of the rolling rotor compressor, the exhaust valve housing 1 is provided with a plurality of mounting holes, the position, number and diameter of which match the threaded through holes 3 on the compressor end cover 2, and the exhaust valve housing 1 is installed on the compressor end cover 2 by fasteners.

[0038] In a preferred embodiment of the exhaust valve of the rolling rotor compressor, the cylinder chamber includes a guide hole for providing axial guidance and limiting of the reciprocating motion of the exhaust piston 6.

[0039] In a preferred embodiment of the discharge valve of the rolling rotor compressor, the elastic reset element 7 is a tension spring, one end of which is fixed to the inner wall of the discharge valve housing 1, and the other end is connected to the discharge piston 6.

[0040] In a preferred embodiment of the exhaust valve of the rolling rotor compressor, the active drive component 4 includes a camshaft, the cam profile of which includes a base circle portion and a protruding portion; when the base circle portion of the camshaft 4 contacts the exhaust piston 6, the exhaust piston 6 is in a closed state; when the protruding portion rotates to contact the exhaust piston 6, it pushes the exhaust piston 6 to open the exhaust valve inlet 5.

[0041] In a preferred embodiment of the discharge valve of the rolling rotor compressor, the cam profile of the camshaft 4 is designed according to the working phase of the compressor main shaft, so that the discharge opening time is synchronized with the time when the compression chamber reaches the discharge pressure.

[0042] In a preferred embodiment of the discharge valve of the rolling rotor compressor, the sealing surface of the discharge piston 6 and the valve seat formed around the air inlet 5 of the discharge valve constitute a metal-metal or metal-elastomer sealing pair to ensure airtightness in the closed state.

[0043] In a preferred embodiment of the discharge valve of the rolling rotor compressor, the discharge valve housing 1 is detachably connected to the compressor end cover 2.

[0044] In a preferred embodiment of the rotary compressor exhaust valve, the rotary compressor exhaust valve is integrated into the end cover of the rotary compressor.

[0045] In a preferred embodiment of the exhaust valve of the rolling rotor compressor, the exhaust valve housing 1 is a cylindrical structure.

[0046] In one embodiment, an exhaust valve applicable to high-speed rolling rotor compressors includes an exhaust valve housing, an exhaust piston, a resilient reset element, and an active drive component. The exhaust valve housing is securely mounted to the end cover of the rolling rotor compressor via bolts. The exhaust valve housing contains a piston guide hole that connects to the high-pressure exhaust channel of the compressor cylinder via the exhaust valve inlet. The exhaust piston and the resilient reset element are installed inside the piston guide hole. The active drive component is mounted in a pre-set bearing seat within the exhaust valve housing and is parallel or coaxial with the compressor's main shaft. The design provided by this invention effectively solves the technical problems of poor reliability, easy breakage, and poor durability of exhaust valve plates in high-speed rolling compressors.

[0047] In one embodiment, a high-speed rolling rotor compressor exhaust valve includes an exhaust valve housing 1, an exhaust piston 6, an elastic reset element 7, and an active drive component 4. The exhaust valve housing 1 is provided with mounting holes and is securely installed on the compressor end cover 2 through threaded through holes 3. A cylinder chamber is provided inside the exhaust valve housing 1, and the exhaust piston 6 is installed inside it, connecting to the exhaust valve inlet 5. The elastic reset element 7 is installed inside the cylinder chamber. The active drive component 4 is installed inside the exhaust valve housing 1 and is parallel or coaxial with the compressor main shaft. The exhaust valve housing 1 constitutes the fixed base and main chamber of this mechanism. The exhaust valve housing 1 is provided with mounting holes to install the exhaust valve housing 1 onto the compressor. The exhaust valve housing 1 is provided with multiple mounting holes, the position, number, and diameter of which match the threaded through holes on the compressor end cover 2. The exhaust valve housing 1 is provided with a cylinder chamber or guide hole to provide precise guidance for the exhaust piston 6. One end of the exhaust valve inlet 5 is connected to the cylinder chamber, and the other end is connected to the high-pressure exhaust channel of the compressor cylinder. The exhaust piston 6 is disposed within the cylinder chamber and performs reciprocating linear motion; the exhaust piston 6 serves as a cover for sealing the exhaust valve inlet 5. The elastic reset element 7 is a spring, and springs 7 are installed inside the exhaust valve housing 1, respectively engaging with the inner wall of the exhaust valve housing 1 and the surface of the exhaust piston 6. The active drive component 4 is a camshaft, which has a cam profile including a base circle portion and a protruding portion.

[0048] In one embodiment, the exhaust valve housing, serving as both a fixed base and the main structure, is precisely aligned with the existing bolt holes on the compressor end cover via pre-set mounting holes, and is securely integrated using standard fasteners (such as bolts). A high-precision guide chamber is machined inside the exhaust valve housing to provide precise axial guidance and limiting for the reciprocating motion of the valve core. One or more exhaust valve inlets are provided on the side wall or end of the housing, which, after installation, achieve seamless fluid communication with the high-pressure exhaust passage inside the compressor. The exhaust piston, serving as the core moving valve core, is mounted in the guide chamber in a reciprocating linear motion manner. Its end facing the air inlet is machined or has a dedicated sealing surface to form a reliable airtight connection with the valve seat in the closed state. A spring, acting as an elastic return element, is housed within the chamber and applies a biasing force to the exhaust piston, causing it to close the exhaust valve inlet. A camshaft serves as the drive source. This camshaft is rotatably supported within the exhaust valve housing by bearings, and its axis of rotation is designed to be parallel to or preferably coaxial with the axis of the compressor main shaft. The proximal end (power input end) of the camshaft is rigidly driven to the extension of the compressor main shaft via a coupling, spline, or keyway. The camshaft integrates a precisely calculated and designed cam profile, which includes at least a base circle and a convex (lift) portion. This cam profile maintains continuous, operable mechanical contact with the driven end face (which can be flat or equipped with rollers) of the exhaust piston. The cam profile of the camshaft is designed according to the compressor main shaft phase, such that when the compressor is in the compression or intake phase, the base circle of the camshaft contacts the exhaust piston, and the exhaust piston seals the exhaust valve inlet under the action of a spring; when the compressor operates to the predetermined exhaust phase, the convex portion of the camshaft pushes the exhaust piston against the spring force and gas pressure, causing it to move linearly and open the exhaust valve inlet.

[0049] In one embodiment, the exhaust mechanism is designed as an independently assembleable module, mainly comprising: an exhaust valve housing 1, an exhaust piston 6, an elastic return element 7 (specifically a spring in this embodiment), and an active drive component 4 (specifically a camshaft in this embodiment). The exhaust valve housing 1 constitutes the fixed base and main chamber of this mechanism. The exhaust valve housing 1 is designed to be installed (cover and fix) at a specific position on the compressor end cover 2 of the rolling rotor compressor (not shown). To achieve precise and secure installation, the exhaust valve housing 1 is provided with multiple mounting holes, the position, number, and diameter of which correspond to and match the existing bolt through holes 3 on the compressor end cover 2. During assembly, bolts (not shown) can be passed sequentially through the mounting holes of the exhaust valve housing 1 and the bolt through holes 3 of the end cover 2 to securely integrate this exhaust mechanism onto the compressor. Specifically, inside the exhaust valve housing 1, a cylinder chamber or guide hole for guiding the exhaust piston 6 is machined or provided. The chamber provides precise guidance for the exhaust piston 6, ensuring it can only reciprocate linearly along a predetermined axis. Specifically, at least one exhaust valve inlet 5 is provided on the exhaust valve housing 1. This inlet 5 penetrates the wall thickness of the exhaust valve housing 1, with one end connected to the chamber housing the exhaust piston 6, and the other end, after assembly, fluidly communicating with the high-pressure exhaust passage of the compressor cylinder (not shown). Specifically, the exhaust piston 6, as a reciprocating valve core component, is slidably disposed within the guide chamber of the exhaust valve housing 1. The exhaust piston 6 has a sealing surface for closing the exhaust valve inlet 5. Specifically, the spring, as an elastic return element, is specifically a tension spring in this embodiment. The spring is housed within the chamber, with one end fitting against the inner wall (or stepped surface) of the exhaust valve housing 1, and the other end fitting against a surface of the exhaust piston 6 (e.g., a flange face or end face). When the spring is in a pre-tensioned state, it applies a continuous elastic bias force to the exhaust piston 6, which is opposite to the exhaust valve inlet 5.

[0050] Specifically, the camshaft, as the active actuator of this mechanism, is rotatably mounted on a pre-set bearing seat within the exhaust valve housing 1. Its axis of rotation is designed to be parallel to or coaxial with the compressor's main shaft (not shown). To achieve power transmission, the proximal end of the camshaft is configured to be driven by an extension of the compressor's main shaft via a coupling. This connection ensures strict mechanical synchronization between the camshaft's rotational motion and the compressor's main shaft's rotational motion. The camshaft has a precisely designed cam profile, comprising a base circle and a raised portion. This cam profile maintains operative contact with the driven end face of the exhaust piston 6.

[0051] When the main shaft of the rolling rotor compressor rotates, driving its internal rolling rotor (not shown) to perform the intake or compression phase, the camshaft, which rotates synchronously with the main shaft, also rotates to the corresponding angle. Within this angle range, the base circle of the camshaft (i.e., the non-lift portion) contacts the driven end face of the exhaust piston 6. At this time, the exhaust piston 6 is not subjected to thrust from the camshaft. Therefore, under the sole action of the continuous elastic bias force (preload) of the spring, the exhaust piston 6 is forcefully pushed to its closed position. In this position, the sealing surface of the exhaust piston 6 tightly blocks or seals the exhaust valve inlet 5 and forms a reliable seal with the valve seat around the exhaust valve inlet 5. The sealing effect of this "non-exhaust state" is crucial, as it ensures that the gas pressure in the cylinder can be effectively built up during the compression phase, preventing premature leakage of high-pressure gas into the exhaust pipe; at the same time, it can also immediately close the exhaust port at the moment the compressor stops, effectively preventing the gas in the high-pressure chamber from flowing back into the compression chamber, thereby avoiding the occurrence of compressor reversal. Furthermore, when the volume of the compression chamber within the compressor is reduced to its minimum and the pressure reaches the exhaust pressure, i.e., when the predetermined exhaust phase is entered, the compressor main shaft drives the camshaft to rotate synchronously to its exhaust lift angle. At this angle, the cam cam protrusion on the camshaft begins to rotate and contacts the driven end face of the exhaust piston 6. As the cam continues to rotate, its convex face with an increasing radius applies an active, forced axial thrust to the exhaust piston 6. The magnitude of this mechanical thrust is designed to overcome the elastic resistance of the spring and the gas pressure at the exhaust valve inlet 5. The exhaust piston 6 is forced to displace axially along the guide chamber, disengaging from its valve seat, as shown in the "Exhaust State" view. This displacement causes the exhaust valve inlet 5 to be fully opened, forming a smooth exhaust flow path. The high-temperature, high-pressure gas compressed in the cylinder is then rapidly and stably discharged through the exhaust valve inlet 5 at a precise moment.

[0052] Furthermore, as the exhaust phase ends and the compressor main shaft is about to enter the next intake cycle, the camshaft also rotates through its exhaust lift angle. Its cam lobe moves away from the driven end face of the exhaust piston 6, and the contact point returns to the base circle of the cam. At this instant, the active thrust from the camshaft is instantly removed. The elastic potential energy stored in the spring 7, previously stretched during the exhaust phase, is immediately released. This restoring force rapidly pushes the exhaust piston 6 in the opposite direction, causing it to reset at high speed and tightly block the exhaust valve intake port 5 again. Thus, a complete working cycle ends, and the exhaust mechanism is ready to enter the "non-exhaust state" of the next cycle.

[0053] This invention provides an exhaust mechanism for a high-speed rolling rotor compressor, the core of which lies in the use of an exhaust piston structure driven by a camshaft and mechanically synchronized with the compressor main shaft. This design replaces the passive exhaust valve (such as a reed valve or tongue valve) that relies on gas pressure difference in traditional compressors with an active, forced timing control method. Existing reed valves are prone to valve oscillation, delayed opening, untimely closing, and even fatigue fracture under high-speed (e.g., high speed, high frequency) conditions. This invention, through rigid cam-piston drive, forcibly "opens" the valve at precise phase moments and forcibly "closes" the valve by spring force at the end of the phase. Its opening and closing actions are entirely predetermined by the mechanical structure and are unaffected by instantaneous airflow fluctuations. This fundamentally solves the response lag and reliability problems of reed valves under high-frequency operation, perfectly adapting to the operating requirements of high-speed compressors, thereby significantly improving the compressor's exhaust efficiency, reducing exhaust resistance, reducing re-expansion losses in clearance volume, and greatly enhancing the overall stability and durability of the compressor operation. At the same time, its modular design also facilitates the performance improvement and modification of existing compressors.

[0054] Furthermore, the camshaft of this invention is rigidly connected to the compressor main shaft through a transmission structure such as a coupling, spline, or keyway, ensuring that its rotational phase is completely consistent with the working cycle of the compression chamber. This design eliminates the dependence of exhaust action on instantaneous pressure difference, instead relying on precise mechanical phase presets. This fundamentally eliminates the opening delay or closing lag caused by back pressure fluctuations in traditional reed valves, achieving precise control of exhaust timing and significantly improving volumetric efficiency and energy efficiency. During the exhaust phase, the lift profile on the camshaft actively pushes the exhaust piston 6 to overcome spring force and gas back pressure, quickly opening the exhaust passage; after the phase ends, the cam returns to the base circle, and the thrust disappears. This rigid forced opening mechanism avoids the chattering, slapping, and stress concentration of flexible valve plates at high frequencies, significantly reducing the risk of fatigue fracture, and is particularly suitable for high-speed applications such as above 6000 rpm and variable frequency operation.

[0055] A tension spring applies a continuous bias force to the exhaust piston, ensuring a rapid and tight seal of the exhaust valve inlet 5 during non-exhaust phases and at the moment of shutdown. This active shut-off mechanism effectively prevents high-pressure gas backflow, avoids compressor reversal, and reduces re-expansion losses within the clearance volume, further improving system stability and energy efficiency.

[0056] The exhaust piston 6 performs opening and closing actions with an integral rigid structure, without repeated bending deformation. The material stress distribution is uniform, and its durability is far superior to that of thin sheet springs. At the same time, its sealing surface can be designed as a flat surface or a structure with a sealing ring, forming a stable sealing pair with the valve seat, maintaining good airtightness even under high temperature and high pressure environments.

[0057] The entire exhaust valve is integrated into the exhaust valve housing 1 and can be installed using the existing bolt holes on the matching end cap, without requiring any modification to the compressor's main structure. This plug-and-play modular solution not only simplifies the assembly process but also provides a low-cost, highly compatible technical path for upgrading the performance of existing compressor products.

[0058] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0059] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A rolling piston compressor exhaust valve characterized by, It comprises, An exhaust valve housing (1) is fixedly installed on a compressor end cover (2), and a cylinder chamber and an exhaust valve inlet (5) communicated with a high-pressure exhaust passage of a compressor cylinder are arranged in the exhaust valve housing (1); An exhaust piston (6) is slidably arranged in the cylinder chamber, and one end of the exhaust piston (6) is provided with a sealing surface for closing the exhaust valve inlet (5), and the other end is a driven end surface; An elastic return element (7) is arranged in the cylinder chamber, and a biasing force towards a closed position is applied to the exhaust piston (6); A driving component (4) is rotatably supported in the exhaust valve housing (1), and the rotation axis is parallel or coaxial with a main shaft of the compressor, and the driving component (4) is connected to the main shaft through a transmission structure, the driving component (4) has a cam profile, the cam profile is in contact with the driven end surface of the exhaust piston (6), and the cam profile is used for pushing the exhaust piston (6) to open the exhaust valve inlet (5) when the compressor operates to an exhaust phase, and the cam profile is separated from the exhaust piston (6) when the compressor operates to a non-exhaust phase, so that the exhaust piston (6) is reset to close the exhaust valve inlet (5) under the action of the elastic return element (7).

2. The rolling piston compressor discharge valve of claim 1 wherein, Preferably, a plurality of mounting holes are arranged on the exhaust valve housing (1), the positions, numbers and diameters of the mounting holes are matched with threaded through holes (3) on the compressor end cover (2), and the exhaust valve housing (1) is installed on the compressor end cover (2) through fasteners.

3. The rolling piston compressor discharge valve of claim 1 wherein, The cylinder chamber comprises a guide hole for providing axial guidance and limiting for the reciprocating motion of the exhaust piston (6).

4. The rolling piston compressor discharge valve of claim 1 wherein, The elastic return element (7) is a tension spring, one end of which is fixed to the inner wall of the exhaust valve housing (1), and the other end of which is connected to the exhaust piston (6).

5. The rolling piston compressor discharge valve of claim 1 wherein, The driving component (4) comprises a cam shaft, the cam profile of the cam shaft comprises a base circle part and a convex part, when the base circle part of the cam shaft (4) is in contact with the exhaust piston (6), the exhaust piston (6) is in a closed state, and when the convex part is rotated to be in contact with the exhaust piston (6), the exhaust piston (6) is pushed to open the exhaust valve inlet (5).

6. The rolling piston compressor discharge valve of claim 5 wherein, The cam profile of the cam shaft (4) is designed according to the working phase of the main shaft of the compressor, so that the exhaust opening time is synchronized with the time when the compression chamber reaches the exhaust pressure.

7. The rolling piston compressor discharge valve of claim 1 wherein, The sealing surface of the exhaust piston (6) and the valve seat formed around the exhaust valve inlet (5) constitute a metal-metal or metal-elastic sealing pair, which ensures the air tightness in the closed state.

8. The rolling piston compressor exhaust valve of claim 1 wherein, The exhaust valve housing (1) is detachably connected to the compressor end cover (2).

9. The rolling piston compressor discharge valve of claim 1 wherein, The exhaust valve of the rolling piston compressor is integrated on the end cover of the rolling piston compressor.

10. The rolling piston compressor discharge valve of claim 1 wherein, The exhaust valve housing (1) is a cylindrical structure.

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