Zero-inner-leakage electric four-way reversing valve suitable for refrigerating medium

Abstract

The invention relates to the field of aviation refrigeration cycle structure design, in particular to a zero-inner-leakage electric four-way reversing valve suitable for a refrigerating medium. Comprising a shell, a connector, a vulcanization valve, a ball valve assembly, a driving shaft, a fastener, a gasket, an electric mechanism, a connecting plate, a baffle, a third sealing ring, a fourth sealing ring, a waveform gasket, a first sealing ring, a second sealing ring and a bearing. The structure is used in an aviation refrigeration cycle structure system to replace an original four-electromagnetic direct-acting valve structure, the problems that a refrigerant reversing valve leaks inwards and cannot feed back signals are solved, and the design integration degree of a refrigeration cycle system is improved. The design of a refrigerant reversing pipeline of a refrigeration cycle system is simplified, and the lightweight design of the whole system is achieved.

Description

Technical Field

[0001] The invention relates to the field of aviation refrigeration cycle structure design, and relates to a zero internal leakage electric four-way reversing valve suitable for refrigeration medium. Background Art

[0002] In all areas of life, refrigeration cycle is indispensable, such as automobile air conditioning circulation system, household air conditioning system, aviation cabin air conditioning adjustment system, etc. In the structural design of the refrigeration cycle system, with the switching of cold and hot states, the direction of the refrigerant in the pipeline also changes accordingly. The reversal of the refrigerant is closely related to the reversing valve of the entire system structure design. The structure and form of the reversing valve thus affect the arrangement of the entire system pipeline and the overall design layout of the system. At present, the control valve structure for the refrigerant flow conversion is mostly electronic expansion valve, electromagnetic two-position four-way reversing valve, and electromagnetic direct-acting valve. These existing structures cannot simultaneously meet the problems of zero internal leakage and feedback of the in-place signal after being in place in the actual refrigeration cycle system. Among them, the electronic expansion valve has a large amount of internal leakage and cannot feedback the in-place signal. The electromagnetic two-position four-way reversing valve has a complex structure, high processing accuracy requirements, a certain amount of internal leakage, and a large electromagnetic force requirement for the high-pressure refrigeration cycle system, and the overall structural design is relatively large. The electromagnetic direct-acting valve has a simple structure, but when the system is used, multiple electromagnetic valves must be arranged at the same time to realize the conversion of the refrigerant medium in the four pipelines. The product integration is low, the control logic is complex, and the in-place signal cannot be fed back. Therefore, designing a reversing valve with zero internal leakage and feedback signal for refrigerant medium conversion is of great significance to the development of refrigeration cycle system. Summary of the invention

[0003] Purpose of the Invention

[0004] An electric four-way reversing valve design structure suitable for refrigerant medium, with zero internal leakage, feedback signal, good precision control and high integration is proposed.

[0005] Technical Solution

[0006] A zero internal leakage electric four-way reversing valve suitable for refrigeration medium, comprising a shell, an interface, a vulcanized valve, a ball valve assembly, a driving shaft, a fastener, a gasket, an electric mechanism, a connecting plate, a baffle, a third sealing ring, a fourth sealing ring, a corrugated gasket, a first sealing ring, a second sealing ring, and a bearing; the ball valve assembly is installed in the shell, and a guide groove is provided at the bottom contact part of the center line position of the ball valve assembly on the shell, and a bearing is installed on the guide groove, and the bearing is used to support the ball valve assembly to prevent the ball valve assembly from lateral shaking; the ball valve assembly is a spherical structure, and two channels are opened on the spherical structure, and the four inlets and outlets on the two channels are evenly distributed on the spherical structure. The four inlets and outlets are respectively aligned with the centers of the four mounting holes on the shell, the vulcanized rubber surface of the vulcanized valve contacts the spherical surface of the ball valve assembly, the corrugated gasket provides sealing elasticity for the vulcanized valve, a dynamic sealing groove is provided on the vulcanized valve, the first sealing ring is installed in the dynamic sealing groove, the vulcanized valve and the interface are sealed by the first sealing ring, a sealing groove is provided on the interface, a sealing groove for installing the first sealing ring is provided on the interface, and the shell and the interface are sealed by the first sealing ring; the center hole of the connecting plate is aligned with the mounting hole on the ball valve assembly, and the connecting plate The third sealing ring is used to seal the driving shaft and the housing. The driving shaft is inserted into the connecting plate and extends into the bushing. The bushing is arranged between the driving shaft and the ball valve assembly. The bushing is fixed to the ball valve assembly by rivets, so that when the driving shaft rotates, the bushing can drive the bushing to rotate, and the bushing drives the ball valve assembly to follow; the driving shaft and the connecting plate are sealed by the fourth sealing ring; the baffle is arranged between the driving shaft and the housing, and is used to limit the axial position of the driving shaft. The electric mechanism is fixed to the connecting plate by fasteners, and the output shaft of the electric mechanism and the driving shaft are matched by gear splines to realize the control of the driving shaft.

[0007] Furthermore, it also includes a gasket, which is arranged between the electric mechanism and the fastener to protect the contact surface of the connecting plate.

[0008] Furthermore, the vulcanized rubber surface on the vulcanized valve is made of rubber material, and the remaining material is made of metal material. The contact portion between the vulcanized rubber and the ball valve assembly is an arc surface.

[0009] Furthermore, the channels are arranged at an angle of ° to each other.

[0010] Furthermore, the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all made of rubber material.

[0011] Furthermore, the bearing is specifically a sliding bearing, a rolling bearing or a bushing with a self-lubricating function. The outer diameter of the bearing should be a clearance fit with the inner hole of the housing, and the inner diameter should be a clearance fit with the boss at the lower end of the ball valve assembly.

[0012] Furthermore, the diameter of the ball valve assembly should be times greater than the diameter of the channel on the ball valve assembly.

[0013] Furthermore, the flow area of ​​the interface should be larger than the flow area of ​​the channel on the ball valve assembly.

[0014] Furthermore, the flow area of ​​the interface is smaller than the aperture of the corrugated gasket. The medium flow of the structure is ensured, the corrugated gasket of the product is prevented from being subjected to the pressure of the product medium, and its elastic compensation force is ensured. The beneficial effects of the present application are:

[0015] The use of this structure in the aviation refrigeration cycle structure system replaces the original four electromagnetic direct-acting valve structures, solves the problem of refrigerant reversing valve internal leakage and inability to feedback signals, and improves the integration of the refrigeration cycle system design. It simplifies the piping design of the refrigerant reversal in the refrigeration cycle system and realizes lightweight design for the entire system.

[0016] The invention points of the present invention:

[0017] The invention discloses a zero internal leakage four-way reversing valve structure for refrigerant medium, which solves the problem that the existing refrigerant reversing mechanism products of the refrigeration cycle system have large internal leakage and cannot feedback the position signal after being in place, and also improves the situation that the existing products have reduced refrigeration efficiency due to the cross-cavity of the refrigerant medium. The invention has a compact structure, zero internal leakage, zero external leakage, and feedbacks the position signal through the electric mechanism, with high product integration and small volume. The product interface is arranged at 90°, and the interface connection form is adjustable and diverse. The structure can also replace the electric mechanism with different conversion time according to the demand of using the conversion time to meet different use environments. The structure can also replace the electric mechanism with different output signals according to the demand of using different types of feedback signals to meet the demand of feedback signals. After the flow direction between the channels of the structure is determined, there will be no cross-cavity phenomenon between the channels. The structure is designed with an elastic compensation structure inside, which can still ensure reliable sealing after long-term and multiple uses.

[0018] This type of product can be used in related expansion areas such as fuel systems for fuel media in aviation, ships, and heavy machinery, and liquid cooling systems for coolant media by replacing rubber and other contact component materials that are compatible with the media, thereby solving the problems of complex liquid medium switching structures and lack of in-place feedback signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the implementation of the structural principle of the present invention;

[0020] The product mainly consists of two parts: the electric mechanism part and the valve part;

[0021] Figure 2 It is a specific structural diagram of the present invention;

[0022] Among them, the housing 1, the interface 2, the vulcanized valve 3, the ball valve assembly 4, the driving shaft 5, the fastener 6, the gasket 7, the electric mechanism 8, the connecting plate 9, the baffle 10, the third sealing ring 11, the fourth sealing ring 12, the corrugated gasket 13, the first sealing ring 14, the second sealing ring 15, and the bearing 16;

[0023] Figure 3 It is a partial view of the present invention;

[0024] Figure 4 It is a schematic diagram of the driving shaft;

[0025] Figure 5 Schematic diagram of the valve. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail in combination with the embodiment of the present invention. In the example, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below by reference are exemplary and intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention. The following is a detailed description in combination with the embodiments of the present invention.

[0027] A zero internal leakage electric four-way reversing valve suitable for refrigeration medium comprises a housing 1, an interface 2, a vulcanized valve 3, a ball valve assembly 4, a driving shaft 5, a fastener 6, a gasket 7, an electric mechanism 8, a connecting plate 9, a baffle 10, a third sealing ring 11, a fourth sealing ring 12, a corrugated gasket 13, a first sealing ring 14, a second sealing ring 15, and a bearing 16; the ball valve assembly 4 is installed in the housing 1, and a guide groove is provided at the bottom contact part of the center line position of the ball valve assembly 4 on the housing 1, and a bearing is installed on the guide groove, and the bearing is used to support the ball valve assembly 4 to prevent the ball valve assembly 4 from shaking laterally; the ball valve assembly 4 is a spherical structure, and two channels are opened on the spherical structure, and the four inlets and outlets on the two channels are evenly distributed on the spherical structure. The four inlets and outlets are respectively aligned with the centers of the four mounting holes on the shell 1, the vulcanized rubber surface of the vulcanized valve 3 contacts the spherical surface of the ball valve assembly 4, the corrugated gasket 13 provides sealing elasticity for the vulcanized valve 3, a dynamic sealing groove is provided on the vulcanized valve 3, a first sealing ring 14 is installed in the dynamic sealing groove, the vulcanized valve 3 and the interface 2 are sealed through the first sealing ring 14, a sealing groove is provided on the interface 2, a sealing groove for installing a first sealing ring 15 is provided on the interface 2, and the shell 1 and the interface 2 are sealed through the first sealing ring 15; the center hole of the connecting plate 9 is aligned with the mounting hole on the ball valve assembly 4, the connecting plate 9 The housing 1 is sealed by a third sealing ring 11, the driving shaft 5 is inserted into the connecting plate 9 and extends into the bushing, the bushing is arranged between the driving shaft 5 and the ball valve assembly 4, and the bushing is fixed to the ball valve assembly 4 by rivets, so that when the driving shaft 5 rotates, the bushing can drive the bushing to rotate, and the bushing drives the ball valve assembly 4 to follow; the driving shaft 5 and the connecting plate 9 are connected by the fourth sealing ring 12; the baffle 10 is arranged between the driving shaft 5 and the housing 1, and is used to limit the axial position of the driving shaft 5, the electric mechanism 8 is fixed to the connecting plate 9 by fasteners, and the output shaft of the electric mechanism 8 and the driving shaft 5 are matched by gear splines to realize the control of the driving shaft 5.

[0028] In a certain implementation case of the present invention, a gasket 7 is further included, and the gasket 7 is arranged between the electric mechanism 8 and the fastener 6 to protect the contact surface of the connecting plate 9. The electric mechanism 8 is fixed to the connecting plate 9 by the fastener 6 to ensure reliable connection. The fastener 6 can be a cylindrical head screw, a hexagon head screw, a hexagon socket screw, etc., and the gasket 7 protects the connecting plate 9 during the tightening process, effectively avoiding the surface damage of the connecting plate 9 during the tightening process of the fastener 6. (Add explanations at the end of each implementation case of the present invention)

[0029] In a certain embodiment of the present invention, the vulcanized rubber surface on the vulcanized valve is made of rubber material, and the remaining material is made of metal material. The contact portion between the vulcanized rubber and the ball valve assembly 4 is preferably an arc surface. The rubber of the vulcanized valve should be compatible with the refrigerant, and the material is hydrogenated nitrile rubber or other rubber. The rubber raised portion is an arc surface, which can ensure reliable contact between the spherical surface and the valve assembly. The diameter of the convex arc section should not be greater than the width of the vulcanized rubber groove, thereby effectively preventing the vulcanized rubber from falling off due to rotation.

[0030] In a certain embodiment of the present invention, the channels are arranged at 90° between each other. The 90° arrangement of the channels can make greater use of the effective area of ​​the ball valve assembly and reduce the overall volume of the design structure. The cross section of the center of the ball valve channel should be larger than the rubber surface of the vulcanized valve except for the channel. The inlet and outlet of the channel should be rounded to prevent the sharp edge from damaging the rubber surface of the vulcanized valve during rotation.

[0031] In a certain embodiment of the present invention, the first sealing ring 14, the second sealing ring 15, the third sealing ring 11, and the fourth sealing ring 12 are all made of rubber material. The design of the sealing ring is mainly used to prevent the leakage of the medium. The first sealing ring 14 and the fourth sealing ring 12 are dynamic sealing designs, and the other two are static sealing designs. The rubber must be compatible with the refrigerant, and the material is hydrogenated nitrile rubber or other rubber.

[0032] In a certain embodiment of the present invention, the bearing 16 is specifically a sliding bearing, a rolling bearing or a bushing with a self-lubricating function. The outer diameter of the bearing 16 should be a clearance fit with the inner hole of the housing 1, and the inner diameter should be a clearance fit with the boss at the lower end of the ball valve assembly 4. The bearing 16 is used to support the ball valve assembly 4.

[0033] In a certain embodiment of the present invention, the diameter of the ball valve assembly 4 should be 2.5 times larger than the diameter of the channel on the ball valve assembly 4. The ball valve diameter being 2.5 times larger than the channel can effectively ensure that the remaining area and the effective area of ​​the ball valve assembly are more utilized.

[0034] In a certain implementation case of the present invention, the flow area of ​​the interface 2 should be larger than the flow area of ​​the channel on the ball valve assembly 4. This is to ensure the medium flow of the ball valve and reduce the flow resistance of the product.

[0035] In a certain embodiment of the present invention, the flow area of ​​the interface 2 is smaller than the aperture of the corrugated gasket 13. This is to ensure the medium flow of the structure, prevent the product corrugated gasket from being subjected to the product medium pressure, and ensure its elastic compensation force.

[0036] refer to Figure 1-Figure 5 Design product structure.

[0037] The structure mainly comprises a housing 1, an interface 2, a vulcanized valve 3, a ball valve assembly 4, a driving shaft 5, a fastener 6, a gasket 7, an electric mechanism 8, a connecting plate 9, a baffle 10, a third sealing ring 11, a fourth sealing ring 12, a corrugated gasket 13, a first sealing ring 14, a second sealing ring 15, and a bearing 16.

[0038] The vulcanized valve and the spherical valve body are sealed between the internal channels through extrusion contact. The product corrugated gasket serves as an elastic compensation element to provide sealing force between the vulcanized valve and the spherical valve body. The product shell and the four interfaces are fixedly connected by screws, and sealing rings are used between the interfaces and the shell to ensure the leakage of the product, thus realizing the product leakage design.

[0039] The connecting plate and the shell are fixed by screws, and an external seal is achieved between the two by a sealing ring. The electric mechanism is used to be fixed to the shell through the connecting plate, provide a rotational torque, and transmit it to the ball valve assembly through the rotating shaft for rotation of the ball valve assembly, thereby realizing conversion between channels.

[0040] The electric mechanism is provided with an in-position feedback signal inside, and the in-position signal is fed back through the electrical interface after it is in position; different electric mechanisms can also be replaced by different conversion times; the interface types can be diverse and can be changed as needed according to different interface types.

[0041] Inventions and creations of product devices:

[0042] Core invention point: The reversing valve structure is designed with four interfaces a, b, c, and d; it is divided into two working states: one state is when interfaces a and c are connected and interfaces b and d are connected; after conversion, interfaces a and d are connected and interfaces b and c are connected in another state. The internal structure sealing design of the reversing valve adopts contact sealing between the vulcanized rubber valve and the valve body. Before and after the flow direction conversion, there is no internal leakage between the two channels, and no cross-cavity occurs between the channels.

[0043] Secondary invention point 1: The valve body structure of the reversing valve is similar to that of a ball valve, and the channel design is realized by drilling holes in each 90° vertical direction. The hole end face is rounded to ensure a smooth transition during the conversion process with the vulcanized sealing surface.

[0044] Secondary invention point 2: The contact seal between the vulcanized rubber valve and the valve body provides the elastic force required for sealing through the elastic compensation element, ensuring the continuous provision of sealing force after the rubber sealing surface is worn, ensuring the sealing pressure ratio, and improving the sealing reliability.

[0045] Secondary invention point 3: The vulcanized rubber valve is designed with a convex chamfer design, which ensures that the valve and the ball valve are in contact with each other to avoid hard metal contact, and reduces the internal volume of the product to optimize the product weight.

[0046] Secondary invention point 4: The overall structure of the reversing valve adopts a structure similar to a "magic cube", with four interfaces arranged around it, which improves the integration of the product and saves design space.

[0047] Minor invention point 5: By adding a position feedback signal to the electric mechanism of the reversing valve, it is possible to detect and feedback the arrival signal after the product is in place.

[0048] Secondary invention point 6: The reversing valve can adjust the switching time of the refrigerant channel flow direction by replacing the electric mechanism with different switching times.

[0049] Minor invention point 7: The interface of the reversing valve can be changed into different interface modes according to actual needs, and has interface diversity.

[0050] It is understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and unless defined as here, will not be interpreted with idealized or overly formal meanings. The specific implementation methods described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Within the spirit and principle of the present invention, any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment of equivalent changes for application in other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc., made according to the technical essence of the present invention, should be included in the protection scope of the present invention.

Claims

1. A zero internal leakage electric four-way reversing valve suitable for refrigeration medium, characterized in that: It includes a shell, an interface, a vulcanized valve, a ball valve assembly, a driving shaft, a fastener, a gasket, an electric mechanism, a connecting plate, a baffle, a third sealing ring, a fourth sealing ring, a corrugated gasket, a first sealing ring, a second sealing ring, and a bearing; the ball valve assembly is installed in the shell, and a guide groove is provided at the bottom contact part of the center line position of the ball valve assembly on the shell, and a bearing is installed on the guide groove, and the bearing is used to support the ball valve assembly to prevent the ball valve assembly from shaking laterally; the ball valve assembly is a spherical structure, and two channels are opened on the spherical structure, and the four inlets and outlets on the two channels are evenly distributed on the spherical structure; the four inlets and outlets are respectively aligned with the centers of the four mounting holes on the shell, the vulcanized rubber surface of the vulcanized valve contacts the spherical surface of the ball valve assembly, the corrugated gasket provides sealing elasticity for the vulcanized valve, the vulcanized valve is provided with a dynamic sealing groove, the first sealing ring is installed in the dynamic sealing groove, the vulcanized valve is provided with a dynamic sealing groove, the first sealing ring is installed in the dynamic sealing groove, The valve and the interface are sealed by a first sealing ring, and a sealing groove is provided on the interface. The interface is provided with a sealing groove for installing the first sealing ring. The shell and the interface are sealed by the first sealing ring; the center hole of the connecting plate is aligned with the mounting hole on the ball valve assembly, and the connecting plate and the shell are sealed by a third sealing ring. The driving shaft is inserted into the connecting plate and extends into the bushing. The bushing is arranged between the driving shaft and the ball valve assembly. The bushing is fixed to the ball valve assembly by rivets, so that when the driving shaft rotates, the bushing can drive the bushing to rotate, and the bushing drives the ball valve assembly to follow; the driving shaft and the connecting plate are through the fourth sealing ring; the baffle is arranged between the driving shaft and the shell, which is used to limit the axial position of the driving shaft. The electric mechanism is fixed to the connecting plate by fasteners, and the output shaft of the electric mechanism and the driving shaft are matched by gear splines to realize the control of the driving shaft.

2. The reversing valve according to claim 1, characterized in that: A gasket is also included, which is arranged between the electric mechanism and the fastener and is used to protect the contact surface of the connecting plate.

3. The reversing valve according to claim 2, characterized in that: The vulcanized rubber surface on the vulcanized valve is made of rubber material, and the remaining materials are made of metal materials. The contact portion between the vulcanized rubber and the ball valve assembly is an arc surface.

4. The reversing valve according to claim 3, characterized in that: The channels are arranged in an angle of ° with each other.

5. The reversing valve according to claim 4, characterized in that: The first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are all made of rubber material.

6. The reversing valve according to claim 5, characterized in that: The bearing is specifically a sliding bearing, a rolling bearing or a bushing with a self-lubricating function; the outer diameter of the bearing and the inner hole of the housing should be a clearance fit, and the inner diameter and the boss at the lower end of the ball valve assembly should be a clearance fit.

7. The reversing valve according to claim 6, characterized in that: The diameter of the ball valve assembly should be times larger than the diameter of the channel on the ball valve assembly.

8. The reversing valve according to claim 7, characterized in that: The flow area of ​​the interface should be larger than the flow area of ​​the channel on the ball valve assembly.

9. The reversing valve according to claim 8, characterized in that: The flow area of ​​the interface is smaller than the aperture of the corrugated gasket, thereby ensuring the medium flow of the structure, preventing the product corrugated gasket from being subjected to the product medium pressure, and ensuring its elastic compensation force.

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