Stop valve, air conditioning system, and manufacturing method for stop valve

Abstract

A stop valve, an air conditioning system, and a manufacturing method for a stop valve. The stop valve comprises a valve body (10), a first valve core (21) and a second valve core (22), wherein a first fluid channel (11) and a second fluid channel (12) are provided in the valve body (10), the second fluid channel (12) being spaced apart and not in communication with the first fluid channel (11); the first fluid channel (11) has at least two first feed ports (111) spaced apart from each other; the second fluid channel (12) has at least two second feed ports (121) spaced apart from each other; the first valve core (21) can be movably mounted to the first fluid channel (11); and the second valve core (22) can be movably mounted to the second fluid channel (12).

Description

Stop valve, air conditioning system and method for manufacturing stop valve

[0001] Related applications

[0002] This application claims priority to Chinese patent applications numbered 202310913540.8, filed on July 24, 2023, entitled “Stop valve, air conditioning system and method for manufacturing stop valve”, and numbered 202321958974.1, filed on July 24, 2023, entitled “Stop valve and air conditioning system”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of stop valves, and in particular to a stop valve, an air conditioning system, and a method for manufacturing the stop valve. Background Art

[0004] Shutoff valves are used to control the flow of refrigerant in air conditioning systems. They are categorized as high-pressure and low-pressure shutoff valves based on the refrigerant's pressure. High-pressure shutoff valves primarily control the flow of liquid refrigerant, while low-pressure shutoff valves primarily control the flow of gaseous refrigerant. In practice, high-pressure and low-pressure shutoff valves must be manufactured separately and installed separately at the outdoor unit, resulting in high manufacturing and installation costs.

[0005] Summary of the Invention

[0006] The present application provides a stop valve, an air conditioning system, and a method for manufacturing a stop valve. A stop valve includes a valve body, a first valve core, and a second valve core. The valve body is constructed with a first fluid channel and a second fluid channel, and the second fluid channel is arranged at intervals from the first fluid channel and is not connected to each other. The first fluid channel has at least two first feed ports arranged at intervals. The second fluid channel has at least two second feed ports arranged at intervals. The first valve core can be movably mounted on the first fluid channel to adjust the flow between the first feed ports. The second valve core can be movably mounted on the second fluid channel to adjust the flow between the second feed ports.

[0007] In one embodiment, the valve body is provided with a mounting section at the first feed port and / or the second feed port, and the mounting section is formed by protruding outward or recessing inward from the surface of the valve body; each of the mounting sections is constructed with a through hole, and each of the through holes can be connected to the corresponding first fluid channel or the second fluid channel.

[0008] In one embodiment, the stop valve further includes a plurality of connectors, each of the connectors corresponds to one of the mounting sections, a sealing cap is provided between the connector and the mounting section, the connector is threadedly connected to the mounting section, the sealing cap is pressed between the connector and the mounting section, and the sealing cap blocks the through hole.

[0009] In one embodiment, at least one end of the first fluid channel along the first direction passes through the valve body, wherein one end is defined as a first assembly end; the first valve core is installed into the first fluid channel from the first assembly end, and a first sealing member is squeezed between the first valve core and the valve body; the stop valve also includes a first valve cover, which is installed at the first assembly end; and / or, at least one end of the second fluid channel along the first direction passes through the valve body, wherein one end is defined as a second assembly end; the second valve core is installed into the second fluid channel from the second assembly end, and a second sealing member is squeezed between the first valve core and the valve body; the stop valve also includes a second valve cover, which is installed at the second assembly end.

[0010] In one embodiment, within the first fluid channel, the valve body is configured with a first limiting end surface, against which the first valve cover is pressed to form a line seal; and / or within the second fluid channel, the valve body is configured with a second limiting end surface, against which the second valve cover is pressed to form a line seal, thereby further enhancing sealing performance.

[0011] In one embodiment, the first fluid channel is used for circulating low-pressure fluid, the second fluid channel is used for circulating high-pressure fluid, and the inner diameter of the first fluid channel is larger than the inner diameter of the second fluid channel.

[0012] In one embodiment, the first fluid channel has at least three first feed ports, wherein at least two of the first feed ports are used to communicate with the heat exchange circuit to transport refrigerant, and at least one of the first feed ports is installed with a filling assembly, which is used to inject refrigerant into the first fluid channel.

[0013] The present application also provides an air conditioning system including the aforementioned stop valve. The present application also provides a method for manufacturing the stop valve, comprising the following steps: obtaining a rod; cutting the rod to obtain a blank; extruding and cutting the blank to form a cylindrical valve body block; machining the valve body block to form a first fluid channel and a second fluid channel; and installing the first valve core and the second valve core into the first fluid channel and the second fluid channel, respectively, to form the stop valve.

[0014] In one embodiment, machining the valve body block to form the first fluid channel and the second fluid channel includes: performing a primary hole opening process on the valve body block along a first direction to form two deep holes arranged at intervals in the valve body block; performing a secondary hole opening process on the valve body block along a second direction to form at least two first short holes arranged at intervals in the valve body block, at least one of the first short holes is connected to one of the deep holes, and at least another first short hole is connected to another of the deep holes.

[0015] In one embodiment, the first side wall of the valve body block is cut to reduce its thickness so that the valve body block has protruding first mounting sections on both sides along the second direction; wherein the first short holes pass through the first mounting sections respectively corresponding to the first holes; the second side wall of the valve body block is cut to reduce its thickness so that the valve body block has protruding second mounting sections on one side along the first direction; wherein the first fluid channel and the second fluid channel respectively pass through the second mounting sections respectively corresponding to the second fluid channel, and the second side wall is set at an angle to the first side wall.

[0016] In one embodiment, machining the valve body block to form the first and second fluid channels includes: performing three drilling operations on the valve body block along a third direction to form at least one second short hole in the valve body block, the second short hole communicating with one of the deep holes; and performing a thickness reduction cutting on a third sidewall of the valve body block to form a protruding third mounting section on at least one side of the valve body block along the third direction; wherein the second short hole extends through the third mounting section.

[0017] In one embodiment, before cutting the rod to obtain the blank, the manufacturing method further includes the following steps: melting aluminum alloy material to obtain liquid aluminum alloy; obtaining a casting mold; injecting the liquid aluminum alloy into the casting mold and waiting for solidification to obtain a columnar solid aluminum alloy; and performing homogenization annealing on the columnar solid aluminum alloy to obtain the rod.

[0018] In one embodiment, the valve body block is machined to form a first fluid channel and a second fluid channel; before that, the manufacturing method also includes heat treating the valve body block: heating the valve body block once, wherein the valve body block is heated to 530°C within 2 hours and kept warm for 2 hours; cooling the valve body block once, wherein the valve body block is water-cooled to room temperature within 20 seconds; heating the valve body block twice, wherein the valve body block is heated to 180°C within 12 hours and kept warm for 2 hours; heating the valve body block three times, wherein the valve body block is heated to 220°C within 10 minutes and kept warm for 2 hours; and air cooling the valve body block.

[0019] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] FIG1 is a schematic structural diagram of a stop valve provided in this application.

[0022] FIG2 is a cross-sectional view of the stop valve provided in this application from one perspective.

[0023] FIG3 is a cross-sectional view of the stop valve provided in this application from another perspective.

[0024] Reference numerals: 100, stop valve; 10, valve body; 101, mounting section; 10101, through hole; 1011, first mounting section; 1012, second mounting section; 1013, third mounting section; 1021, first assembly end; 1022, second assembly end; 103, deep hole; 104, first short hole; 105, second short hole; 11, first fluid channel; 12, second fluid channel; 13, first side wall ; 14. Second side wall; 15. Third side wall; 16. Limiting platform; 17. First limiting end face; 18. Second limiting end face; 111. First feeding port; 121. Second feeding port; 21. First valve core; 22. Second valve core; 30. Connecting head; 41. First valve cover; 42. Second valve cover; 50. Filling assembly; 60. Limiting ring; 71. First sealing member; 72. Second sealing member; 80. Sealing cap. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0028] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0030] Please refer to Figures 1 to 3. The present application provides a stop valve 100, which includes a valve body 10, a first valve core 21 and a second valve core 22. The valve body 10 is constructed with a first fluid channel 11 and a second fluid channel 12, and the second fluid channel 12 is spaced apart from the first fluid channel 11 and is not connected to each other. The first fluid channel 11 has at least two first feed ports 111 spaced apart. The second fluid channel 12 has at least two second feed ports 121 spaced apart. The first valve core 21 can be movably mounted on the first fluid channel 11, and the first valve core 21 can move in the first fluid channel 11 to control the on / off of the first feed port 111. The second valve core 22 can be movably mounted on the second fluid channel 12, and the second valve core 22 can move in the second fluid channel 12 to adjust the on / off between each second feed port 121.

[0031] The first valve core 21 can be movably installed in the first fluid channel 11 . The first valve core 21 can move in the first fluid channel 11 to cooperate with the first valve port to control the opening and closing of the first feeding port 111 .

[0032] The second valve core 22 can be movably installed in the second fluid channel 12 . The second valve core 22 can move in the second fluid channel 12 to cooperate with the second valve port to adjust the on / off between the second feeding ports 121 .

[0033] In this way, a first fluid channel 11 and a second fluid channel 12 are simultaneously provided in a valve body 10 so that the valve body 10 can be connected to two different pipelines, and these two different pipelines respectively control the flow of fluid in their respective pipes through separate first fluid channels 11 and second fluid channels 12.

[0034] Specifically, a first fluid channel 11 and a second fluid channel 12 are provided in a valve body 10 so that the valve body 10 can be connected to two different pipelines. The two different pipelines respectively control the flow of fluid in their respective pipelines through separate first valve cores 21 and second valve cores 22.

[0035] Specifically, the first fluid channel 11 is movably equipped with a first valve core 21, and the movement of the first valve core 21 switches the on-off state between each first feed port 111. Similarly, the second fluid channel 12 is movably equipped with a second valve core 22, and the movement of the second valve core 22 switches the on-off state between each second feed port 121. When the shut-off valve 100 is applied to an air-conditioning system, it can replace the high-pressure shut-off valve 100 and the low-pressure shut-off valve 100 in the heat exchange circuit of the air-conditioning system. For example, the pipeline where the low-pressure shut-off valve 100 is located is connected to the first fluid channel 11, and the movement of the first valve core 21 creates a hard seal with the valve body 10, thereby controlling the flow of fluid in the pipeline. The pipeline where the high-pressure shut-off valve 100 is located is connected to the second fluid channel 12, and the movement of the second valve core 22 creates a hard seal with the valve body 10, thereby controlling the flow of fluid in the pipeline. When installing the air conditioner, the stop valve 100 only needs to be installed once to realize the functions of the traditional high and low pressure valves, reducing the secondary installation steps, and there is no need to consider structural avoidance with other stop valves 100. The installation is more convenient and quick, which helps to improve assembly efficiency.

[0036] As shown in Figures 1 to 3, for the sake of convenience, the second direction is set as the x-axis, the third direction is set as the y-axis, and the first direction is set as the z-axis. At the same time, the valve body 10 is a rectangular structure as an example for explanation. The walls of the valve body 10 on both sides along the x-axis direction are set as the first side wall 13, the walls of the valve body 10 on both sides along the z-axis direction are set as the second side wall 14, and the walls of the valve body 10 on both sides along the y-axis direction are set as the third side wall 15.

[0037] As shown in Figure 2, in an optional embodiment, a first fluid channel 11 is used to circulate low-pressure fluid, and a second fluid channel 12 is used to circulate high-pressure fluid. To ensure the CV value of the circulation channel, the inner diameter of the first fluid channel 11 is d1, and the inner diameter of the second fluid channel is d2, and d1>d2. Thus, within the same valve body, the first fluid channel 11 has a larger inner diameter to increase the circulation space and ensure the flow rate of the low-pressure fluid, while the second fluid channel 12 has a smaller inner diameter to increase the flow rate of the high-pressure fluid, thereby reducing pressure loss and also reducing material usage when opening the hole.

[0038] As shown in Figures 1 to 3, in an optional embodiment, the valve body 10 is provided with a mounting section 101 protruding from the first feed port 111 and / or the second feed port 121. Each mounting section 101 is constructed with a through hole 10101 extending along its own extension direction, and each through hole 10101 is connected to the corresponding first fluid channel 11 or second fluid channel 12. In this way, the mounting section 101 can be used to connect to an external pipeline. The mounting section 101 is protruding from the valve body 10, which can reserve space for installation and connection. It also helps to increase the connection area between the valve body 10 and the external pipeline, making the connection more reliable. The external pipeline can be connected to the first fluid channel 11 or the second fluid channel 12 through the mounting section 101. In other embodiments, the mounting section 101 can also be configured to be recessed inward from the surface of the valve body 10. The external pipeline or pipeline connector is inserted into the mounting section 101 and sealed to achieve communication between the external pipeline and the first fluid channel 11 or the second fluid channel 12.

[0039] Furthermore, according to the different positions of the first feeding port 111 and / or the second feeding port 121, the corresponding position of the installation section 101 is also different, and is divided into a first installation section 1011, a second installation section 1012 and a third installation section 1013. The first installation section 1011 is located on the first side wall 13, the second installation section 1012 is located on the second side wall 14, and the third installation section 1013 is located on the third side wall 15.

[0040] The plurality of mounting sections 101 are arranged on the same side or on opposite sides.

[0041] As shown in Figures 1 to 3, in a further embodiment, the stop valve 100 further includes a plurality of connectors 30, each connector 30 corresponds to a mounting section 101, and each connector 30 is detachably connected to the corresponding mounting section 101. In this arrangement, the connector 30 is simultaneously connected to the mounting section 101 and the external pipeline to achieve assembly of the mounting section 101 and the external pipeline, which is beneficial to protecting the structure of the mounting section 101. At the same time, the detachable connection method makes it easy to replace the connecting pipeline at any time. Exemplarily, the connector 30 is constructed with an internal thread, and the mounting section 101 and the external pipeline are respectively constructed with external threads, and the connection between the mounting section 101 and the external pipeline and the connector 30 is achieved through threaded matching.

[0042] Furthermore, a sealing cap 80 is provided between the connector 30 and the mounting section 101. The connector 30 and the mounting section 101 are threadedly connected. The sealing cap 80 is pressed between the connector 30 and the mounting section 101. The sealing cap 80 blocks the through hole 10101 so as to seal before the mounting section 101 is connected to the external pipeline, and protect the internal structure of the valve body 10 when the pipeline is not connected. When the mounting section 101 is connected to the external pipeline, the sealing cap 80 needs to be disassembled and removed.

[0043] In an optional embodiment, the mounting section 101 is integrally formed with the valve body 10. In this way, the mounting section 101 is formed while the valve body 10 is being processed, which can reduce the number of processing steps and improve processing efficiency.

[0044] In another optional embodiment, the mounting section 101 is formed to protrude outward from the surface of the valve body 10, and the mounting section 101 is formed separately from the valve body 10. This facilitates replacement of the mounting section 101 if it becomes damaged, eliminating the need to replace the entire valve body 10 due to damage to the mounting section 101, thereby reducing costs. Exemplarily, the mounting section 101 is welded, bonded, or detachably connected to the valve body 10.

[0045] As shown in Figures 1 to 3, in an optional embodiment, at least one end of the first fluid channel 11 along the first direction passes through the valve body 10, one end of which is defined as a first assembly end 1021. The first valve core 21 is installed in the first fluid channel 11 from the first assembly end 1021, and a first sealing member 71 is squeezed between the valve body 10. The stop valve 100 also includes a first valve cover 41, which is installed on the first assembly end 1021. In this way, the provision of the first assembly end 1021 facilitates the installation of the first valve core 21 in the first fluid channel 11, and the port on the side where the first valve core 21 is located is blocked by the first valve cover 41, thereby ensuring the sealing of the port and preventing fluid leakage.

[0046] Similarly, as shown in Figures 1 to 3, the second fluid passage 12 extends through the valve body 10 at least at one end along the first direction, one end of which is defined as a second assembly end 1022. The second valve core 22 is installed into the second fluid passage 12 at the second assembly end 1022, with a second sealing member 72 squeezed between the valve body 10. The shut-off valve 100 also includes a second valve cover 42, which is mounted on the second assembly end 1022. The configuration of the second fluid passage 12 can be referred to as that of the first fluid passage 11 and will not be further described here.

[0047] Furthermore, a mounting hole is constructed on one side of the valve body along the z-axis direction away from the first assembly end 1021 and the second assembly end 1022. In the air-conditioning system, the stop valve 100 can be installed on the air-conditioning panel through the mounting hole, and bolts, screws, etc. can be used to pass through the air-conditioning panel and extend into the inner thread of the mounting hole to achieve connection between the two.

[0048] As shown in FIG3 , in a more specific embodiment, the stop valve 100 further includes a retaining ring 60. The inner walls of the first and second fluid channels 11 and 12 are configured with retaining grooves for receiving the retaining ring 60. Within the first fluid channel 11, the retaining ring 60 is positioned between the first valve cover 41 and the first valve core 21 to limit the movement of the first valve core 21 and prevent it from dislodging from the first fluid channel 11. Within the second fluid channel 12, the retaining ring 60 is positioned between the second valve cover 42 and the second valve core 22 to limit the movement of the second valve core 22 and prevent it from dislodging from the second fluid channel 12.

[0049] In a further embodiment, in the first fluid channel 11, the valve body 10 is constructed with a first limiting end surface 17, and the first valve cover 41 is pressed against the first limiting end surface 17 to form a line seal. Within the second fluid channel 12, the valve body 10 is constructed with a second limiting end surface 18, and the second valve cover 42 is pressed against the second limiting end surface 18 to form a line seal. Thus, taking the first limiting end surface 17 as an example, the line seal provides a good sealing effect, and can achieve an even better sealing effect than the first seal 71. Even if fluid leaks from the first seal 71 to the space between the first valve cover 41 and the first valve core 21, the first valve cover 41 can form a line seal with the first limiting end surface 17, thereby blocking the fluid leakage path. Specifically, the valve body 10 can achieve a line seal by forming a conical first limiting end surface 17, which is pressed against the right-angled edge of the first valve cover 41. The second limiting end surface 18 and the second valve cover 42 also have a similar effect, which will not be described in detail here.

[0050] As shown in Figure 3, in a further embodiment, the valve body 10 is configured with a limit plate 16 within the first fluid channel 11, and the first valve core 21 has a first position. In this first position, the shut-off valve 100 disconnects the fluid connection, and the first valve core 21 is pressed against the limit plate 16, forming a hard seal. Thus, the limit plate 16 limits the movement of the first valve core 21, and the first valve core 21 can abut against the limit plate 16, forming a hard seal with the limit plate 16, thereby blocking the flow of fluid and achieving a shut-off effect.

[0051] Similarly, a corresponding limiting platform 16 may be provided in the second fluid channel 12 to limit and seal the second valve core 22 . For details, please refer to the setting of the limiting platform 16 in the first fluid channel 11 , which will not be described in detail here.

[0052] Furthermore, taking the first fluid channel 11 as an example, the first fluid channel 11 includes a deep hole 103 and a short hole. The short hole is connected to the deep hole 103 and is arranged at an angle. The first valve core 21 is inserted into the deep hole 103 and can move axially along the deep hole 103. The first valve core 21 and the hole wall of the deep hole 103 are sealed to prevent fluid leakage. The end of the short hole facing away from the deep hole 103 serves as a first feed port 111. In some embodiments, there are two short holes and they are spaced apart along the axial direction of the deep hole 103. The axes of the short holes are parallel to each other and correspond to a first feed port 111 respectively. Each first feed port 111 is located on the first side wall 13 of the valve body 10 along the x-axis. In an alternative embodiment, there is only one short hole. At least one end of the deep hole 103 along its axial direction (i.e., the z-axis) extends through the second sidewall 14 of the valve body 10. In this case, the end of the short hole facing away from the deep hole 103 and the end of the deep hole 103 along its axial direction each correspond to a first feed port 111. The structural arrangement of the second fluid channel 12 can also refer to that of the first fluid channel 11 and will not be further described here. Specifically, the short hole located on the first sidewall 13 is the first short hole 104, and the short hole located on the third sidewall 15 is the second short hole 105.

[0053] As shown in Figures 2 and 3, in a further embodiment, the first fluid channel 11 has at least three first feed ports 111, of which at least two first feed ports 111 are used to communicate with the heat exchange circuit to deliver refrigerant. At least one of the first feed ports 111 is installed with a charging assembly 50, which is used to inject refrigerant into the first fluid channel 11. In this way, in addition to the at least two first feed ports 111 communicating with the pipelines in the heat exchange circuit, at least one first feed port 111 is added to facilitate the formation of an assembly space for installing the charging assembly 50. Since gaseous fluids are prone to leakage, the charging assembly 50 facilitates replenishment when the gaseous fluid flow is insufficient.

[0054] In an optional embodiment, the valve body 10 can be processed and formed in one step, and then the first fluid channel 11 and the second fluid channel 12 can be formed by machining. In another optional embodiment, the valve body 10 can also be processed in parts and then assembled and connected. Exemplarily, the valve body 10 includes a first part and a second part, one of which is configured with one first feed port 111 and one second feed port 121, and the other is configured with another first feed port 111 and another second feed port 121. The first part and the second part are assembled accordingly to form a complete first fluid channel 11 and a second fluid channel 12. The arrangement of the parts makes processing easier and facilitates replacement of the corresponding first part or second part when the valve body 10 is damaged.

[0055] The present application also provides an air conditioning system including the aforementioned stop valve 100. Thus, the air conditioning system can simultaneously control the on / off of two different pipelines using a single stop valve 100. Furthermore, during actual assembly, only one stop valve 100 needs to be installed, reducing the number of installation steps and improving assembly efficiency.

[0056] In a specific embodiment, the air conditioning system further includes a compressor, a first heat exchanger, and a second heat exchanger. The two first feed ports 111 of the shut-off valve 100 are connected between the compressor and the second heat exchanger, and the two second feed ports 121 of the shut-off valve 100 are connected between the second heat exchanger and the first heat exchanger, thereby defining a heat exchange circuit.

[0057] Generally, an air conditioning system has a cooling mode and a heating mode. In the cooling mode, the compressor outputs a high-temperature, high-pressure gaseous refrigerant, which is input into the first heat exchanger. After heat exchange in the first heat exchanger, it is cooled and becomes a medium-temperature liquid refrigerant. Then, the medium-temperature liquid refrigerant is throttled and depressurized and input into the second heat exchanger to exchange heat with the external air. After absorbing heat, the refrigerant evaporates into a gaseous state and is sucked back into the liquid reservoir to continue the refrigeration cycle. In the heating mode, the compressor outputs a high-temperature gaseous refrigerant, which is input into the second heat exchanger to exchange heat with the external air. The gaseous refrigerant releases heat and becomes a medium-temperature liquid refrigerant. Then, the medium-temperature liquid refrigerant is throttled and depressurized and becomes a low-temperature, low-pressure liquid refrigerant that flows into the first heat exchanger. After absorbing heat and evaporating into a gaseous state in the first heat exchanger, it returns to the liquid reservoir to continue the heating cycle.

[0058] Therefore, the two first feed ports 111 in the stop valve 100 are connected between the four-way valve and the second heat exchanger to facilitate the control of the on-off flow of the gaseous refrigerant between the compressor and the second heat exchanger. The two second feed ports 121 in the stop valve 100 are connected between the second heat exchanger and the first heat exchanger to facilitate the control of the on-off flow of the liquid refrigerant between the second heat exchanger and the first heat exchanger. More specifically, the air-conditioning system has a throttling element, which is connected between the first heat exchanger and the second heat exchanger to throttle and reduce the pressure of the refrigerant. Exemplarily, the throttling element is configured as an expansion valve, a capillary tube, etc., and the specific second feed port 121 is connected between the throttling element and the second heat exchanger.

[0059] The present application also provides a method for manufacturing a stop valve 100, which is used to manufacture the above-mentioned stop valve 100. The manufacturing method includes the following steps: obtaining a rod; cutting the rod to obtain a blank; extruding and cutting the blank to form a valve body block; machining the valve body block to form a first fluid channel 11 and a second fluid channel 12; and respectively installing the first valve core 21 and the second valve core 22 into the first fluid channel 11 and the second fluid channel 12 to form the stop valve 100.

[0060] It should be noted that the stop valve 100 in the present application is made of aluminum alloy. Aluminum alloy is a light metal material, which can make the overall weight of the stop valve 100 lighter. In addition, the price of aluminum alloy is low, which helps to reduce production costs. Therefore, the rod material is mainly a rod formed by aluminum alloy. By cutting the rod material, multiple blanks are obtained. The individual blanks are then extruded to form profiles, and then cut to form multiple columnar valve body blocks. Then, the valve body blocks are machined, such as by drilling holes and cutting, to form the first circulation channel and the second circulation channel. Finally, the first valve core 21 and the second valve core 22 are respectively installed in the first fluid channel 11 and the second fluid channel 12, and the corresponding first valve cover 41, the second valve cover 42 and the connector 30 are connected to form a complete stop valve 100. Among them, the aluminum alloy can be directly extruded after the blank is obtained. The steps are simple and no additional molding process is required, which helps to improve production efficiency.

[0061] In an optional embodiment, before cutting the rod to obtain the blank, the manufacturing method further comprises the following steps: melting an aluminum alloy material to obtain a liquid aluminum alloy; obtaining a casting mold; pouring the liquid aluminum alloy into the casting mold and allowing it to solidify to obtain a columnar solid aluminum alloy; and homogenizing the columnar solid aluminum alloy to obtain the rod. In this manner, the casting mold facilitates the solidification and shaping of the liquid aluminum alloy, forming a solid aluminum alloy of a specific shape. Homogenizing the solid aluminum alloy can eliminate or reduce intragranular segregation, thereby improving the properties of the solid aluminum alloy and homogenizing the microstructure within the solid aluminum alloy. In a specific embodiment, homogenizing the columnar solid aluminum alloy includes: using 6061 aluminum alloy as the columnar solid aluminum alloy; holding the columnar solid aluminum alloy at 520°C-540°C for 12 hours; furnace cooling to 300°C; and air cooling to room temperature.

[0062] In a further embodiment, in the step of cutting the rod to obtain a blank, the blank is a special-shaped structure, that is, a blank of a certain shape is obtained, so that the blank can be further processed later to form a columnar valve body block.

[0063] In an optional embodiment, extruding the blank includes: obtaining an extrusion die; placing the blank into the extrusion die; heating the blank to 450°C-550°C and extruding the blank using a pressure of not less than 2000T; wherein the temperature of the extrusion die is between 400°C-500°C. In this way, the high temperature can soften the microstructure of the blank to a certain extent, and under the action of a high extrusion pressure, it can be formed into a specific shape through the extrusion die. For example, a solid aluminum bar can be formed to facilitate subsequent cutting into multiple valve body blocks to form the preliminary contour shape of the valve body 10. In specific embodiments, the blank can be heated to 450°C, 500°C, or 550°C; and the blank can be extruded using a pressure of 2000T, 3000T, or 5000T.

[0064] In an optional embodiment, after forming the columnar valve body block, the manufacturing method further includes: heat treating the valve body block. In this way, the structure of the valve body block can be improved by heat treating the valve body block, which is conducive to obtaining a valve body 10 with excellent performance.

[0065] In one specific embodiment, the heat treatment of the valve body block includes: heating the valve body block once, raising the temperature to 530°C within 2 hours and maintaining it at that temperature for 2 hours; cooling the valve body block once, water-cooling the valve body block to room temperature within 20 seconds; heating the valve body block twice, raising the temperature to 180°C within 12 hours and maintaining it at that temperature for 2 hours; heating the valve body block three times, raising the temperature to 220°C within 10 minutes and maintaining it at that temperature for 2 hours; and air cooling the valve body block. This configuration, through continuous heating and cooling of the valve body block, effectively reduces residual stress, minimizes surface deformation and cracking, and facilitates subsequent machining operations such as drilling and cutting.

[0066] In an optional embodiment, machining the valve body block to form the first fluid channel 11 and the second fluid channel 12 includes: performing a primary drilling process on the valve body block along a first direction to form two deep holes 103 in the valve body block; performing a secondary drilling process on the valve body block along a second direction to form at least two first short holes 104 spaced apart in the valve body block, at least one first short hole 104 being connected to one of the deep holes 103, and at least another first short hole 104 being connected to another of the deep holes 103. Thus, taking the first fluid channel 11 as an example, the deep hole 103 is machined along the first direction, one end of the deep hole 103 can form a first discharge port, and the other end of the deep hole 103 is used to mount the first valve core 21 and can be sealed by the first valve cover 41; and the first short hole 104 is machined along the second direction on the valve body 10 to form another first discharge port in communication with the deep hole 103. The communication between the deep hole 103 and the first short hole 104 facilitates the formation of the first fluid channel 11. The processing of the second fluid channel 12 can refer to the first fluid channel 11 and will not be described in detail here.

[0067] In other embodiments, the valve body block may be drilled once in the first direction to form two deep holes 103 spaced apart, with only one end of each deep hole 103 penetrating the valve body block. One deep hole 103 is used to mount the first valve core 21, and the other deep hole 103 is used to mount the second valve core 22. The valve body block is drilled a second time in the second direction to form at least four first short holes 104 spaced apart. At least two of the first short holes 104 are connected to one of the deep holes 103 and are arranged at an angle to form a first fluid channel 11, and one end of each first short hole 104 axially away from the deep hole 103 is defined as a first discharge port. At least two other first short holes 104 are connected to another of the deep holes 103 and are arranged at an angle to form a second fluid channel 12, and one end of each first short hole 104 axially away from the corresponding deep hole 103 is defined as a second discharge port.

[0068] In a further embodiment, machining the valve body block to form the first fluid channel 11 and the second fluid channel 12 includes: performing three hole drilling operations on the valve body block along the third direction to form at least one second short hole 105 in the valve body block, and the second short hole 105 is connected to one of the deep holes 103. In this way, by machining the second short hole 105, it is convenient to add at least one first feed port 111 for installing the filling assembly 50. The second short hole 105 is connected to the deep hole 103, which facilitates the filling assembly 50 to fill the deep hole 103 with refrigerant. In more embodiments, a plurality of spaced second short holes 105 are machined on the valve body block, and the plurality of second short holes 105 extend along the third direction, and a plurality of spaced first feed ports 111 are correspondingly formed on the third side wall 15 to install a plurality of filling assemblies 50.

[0069] As shown in Figures 1 and 2, in an optional embodiment, machining the valve body block to form the first fluid channel 11 and the second fluid channel 12 further includes: thinning the first sidewall 13 of the valve body block to form protruding first mounting sections 1011 on both sides of the valve body block along the second direction. The first short holes 104 extend through the corresponding first mounting sections 1011. Thus, both sidewalls of the valve body block along the x-axis are first sidewalls 13. Since the first short holes 104 are respectively formed in the two first sidewalls 13, when cutting the first sidewalls 13, the first short holes 104 are cut and retained to form the first mounting sections 1011 protruding outward from the first sidewall 13. This protects the structure of the first short holes 104, ensures the extended length of the first short holes 104, and facilitates the connection of external pipelines to the first short holes 104 through the first mounting sections 1011. In addition, by cutting the first side wall 13 to reduce its thickness, the installation section 101 on the first side wall 13 is integrally formed with the valve body 10 , thereby reducing the number of installation and connection steps.

[0070] As shown in Figures 1 and 2, in an optional embodiment, the axial direction of one of the first feed ports 111 is the same as the first direction, and the axial direction of one of the second feed ports 121 is the same as the first direction. That is, along the first direction, two deep holes 103 are machined through the valve body block, and one end of the two deep holes 103 along their own axial direction is respectively defined as one of the first feed ports 111 and one of the second feed ports 121. Based on this, machining the valve body block to form the first fluid channel 11 and the second fluid channel 12 also includes: cutting the second side wall 14 of the valve body block to reduce the thickness, so that a protruding second mounting section 1012 is formed on one side of the valve body block along the axial direction of the first fluid channel 11 and / or the second fluid channel 12. The first fluid channel 11 and the second fluid channel 12 respectively penetrate their respective corresponding second mounting sections 1012, and the second side wall 14 is set at an angle to the first side wall 13. Thus, the sidewalls on both sides of the valve body block along the z-axis are both second sidewalls 14. Since deep hole 103 is defined in second sidewall 14, a portion is cut and retained at deep hole 103 during cutting to form a second mounting segment 1012 projecting outward from second sidewall 14. This protects the structure of deep hole 103, ensures the extended length of deep hole 103, and facilitates connection of external piping to deep hole 103 through second mounting segment 1012. Furthermore, by reducing the thickness of second sidewall 14, second mounting segment 1012 on second sidewall 14 is integrally formed with valve body 10, reducing the number of installation and connection steps.

[0071] As shown in Figures 1 and 3, in an optional embodiment, machining the valve body block to form the first and second fluid channels 11 and 12 further includes: thinning the third sidewall 15 of the valve body block to form a protruding mounting section 101 on at least one side of the valve body block along the third direction. Thus, the sidewalls of the valve body block along the y-axis serve as the second sidewalls 14. Because the third sidewall 15 defines a second short hole 105, when thinning the third sidewall 15, a portion of the second short hole 105 is cut to form a third mounting section 1013 protruding outward from the third sidewall 15. This protects the structure of the second short hole 105 and ensures the extended length of the third short hole, creating sufficient space for installing the filling assembly 50. Furthermore, thinning the third sidewall 15 allows the third mounting section 1013 on the third sidewall 15 to be integrally formed with the valve body 10, reducing the number of installation and connection steps.

[0072] In summary, after cutting and forming each mounting segment 101 on the valve body block, a threaded structure can be turned on the outer wall of the corresponding mounting segment 101 to connect with the corresponding connector 30. Alternatively, the mounting segment 101 can be specifically turned to facilitate matching with the corresponding connector 30. Furthermore, when machining each deep hole 103, a retaining groove for mounting the retaining ring 60 can be turned on the wall of each deep hole 103. In this way, after the valve core corresponding to each deep hole 103 is installed, the corresponding retaining ring 60 and valve cover are installed, thereby forming a stop valve 100 for an air conditioning system.

[0073] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above merely represent several implementation methods of the present application. While the descriptions of the embodiments are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the concept of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of patent protection of the present application shall be based on the appended claims.

Claims

1. A stop valve, characterized in that: include: The valve body is constructed with a first fluid channel and a second fluid channel, wherein the second fluid channel is arranged at intervals from the first fluid channel and is not connected to each other; the first fluid channel has at least two first feed ports arranged at intervals; The second fluid channel has at least two second feed ports spaced apart from each other; A first valve core, which can be movably installed in the first fluid channel to adjust the opening and closing between the first feeding ports; The second valve core can be movably installed in the second fluid channel to adjust the connection and disconnection between each second feeding port.

2. The stop valve according to claim 1, wherein: The valve body is provided with a mounting section at the first feeding port and / or the second feeding port, and the mounting section is formed by convexly protruding outward or concavely protruding inward from the surface of the valve body; Each of the mounting sections is configured with a through hole, and each of the through holes can be communicated with the corresponding first fluid channel or the second fluid channel.

3. The stop valve according to claim 2, wherein: The stop valve also includes a plurality of connectors, each of which corresponds to an installation section, a sealing cap is provided between the connector and the installation section, the connector is threadedly connected to the installation section, the sealing cap is pressed between the connector and the installation section, and the sealing cap blocks the through hole.

4. The stop valve according to claim 1, wherein: At least one end of the first fluid channel along the first direction penetrates the valve body, wherein one end is defined as a first assembly end; the first valve core is installed into the first fluid channel from the first assembly end, and a first sealing member is squeezed between the first valve core and the valve body; the stop valve further includes a first valve cover, which is installed on the first assembly end; And / or, at least one end of the second fluid channel along the first direction passes through the valve body, and one end is defined as a second assembly end; the second valve core is installed into the second fluid channel from the second assembly end, and a second sealing member is squeezed between the second valve core and the valve body; the stop valve also includes a second valve cover, and the second valve cover is installed on the second assembly end.

5. The stop valve according to claim 4, wherein: In the first fluid channel, the valve body is configured with a first limiting end surface, and the first valve cover is pressed against the first limiting end surface to form a line seal; and / or, In the second fluid passage, the valve body is configured with a second limiting end surface, and the second valve cover is pressed against the second limiting end surface to form a line seal.

6. The stop valve according to claim 5, wherein: The stop valve also includes a limit ring; The inner wall of the first fluid channel is configured with a limiting groove for installing the limiting ring, and the limiting ring is located between the first valve cover and the first valve core to limit the movement of the first valve core; and / or, The inner wall of the second fluid channel is configured with a limiting groove for installing the limiting ring, and the limiting ring is located between the second valve cover and the second valve core to limit the movement of the second valve core.

7. The stop valve according to claim 1, wherein: The first fluid channel is used for circulating low-pressure fluid, and the second fluid channel is used for circulating high-pressure fluid. The inner diameter of the first fluid channel is greater than the inner diameter of the second fluid channel.

8. The stop valve according to claim 1, wherein: The first fluid channel has at least three first feed ports, wherein at least two of the first feed ports are used to communicate with the heat exchange circuit to transport refrigerant, and at least one of the first feed ports is installed with a filling component, which is used to inject refrigerant into the first fluid channel.

9. An air conditioning system, characterized in that: A stop valve comprising the stop valve according to any one of claims 1 to 8.

10. A method for manufacturing a stop valve, characterized in that: For manufacturing the stop valve according to any one of claims 1 to 8, the manufacturing method comprises the following steps: Get the rods; cutting the rod to obtain a blank; Extruding and cutting the blank to form a columnar valve body block; machining the valve body block to form a first fluid channel and a second fluid channel; The first valve core and the second valve core are respectively installed in the first fluid channel and the second fluid channel to form the stop valve.

11. The manufacturing method according to claim 10, wherein: The machining of the valve body block to form the first fluid channel and the second fluid channel comprises: Performing a hole-opening process on the valve body block along a first direction so that the valve body block is formed with two deep holes arranged at intervals; The valve body block is subjected to secondary hole opening processing along the second direction so that the valve body block is formed with at least two first short holes arranged at intervals, at least one of the first short holes is connected to one of the deep holes, and at least another first short hole is connected to another of the deep holes.

12. The manufacturing method according to claim 11, wherein: The machining the valve body block to form the first fluid channel and the second fluid channel also includes: The first side wall of the valve body block is cut to reduce thickness, so that the valve body block is provided with protruding first mounting sections on both sides along the second direction; wherein the first short holes penetrate the first mounting sections respectively corresponding to the first short holes; The second side wall of the valve body block is cut to reduce thickness so that a protruding second mounting section is formed on one side of the valve body block along the first direction; wherein the first fluid channel and the second fluid channel respectively penetrate through their respective corresponding second mounting sections, and the second side wall is arranged at an angle to the first side wall.

13. The manufacturing method according to claim 11, wherein: The machining of the valve body block to form the first fluid channel and the second fluid channel comprises: performing three hole-opening operations on the valve body block along the third direction, so that the valve body block forms at least one second short hole, the second short hole being connected to one of the deep holes; The third side wall of the valve body block is cut to reduce thickness, so that a protruding third installation section is formed on at least one side of the valve body block along the third direction; wherein the second short hole passes through the third installation section.

14. The manufacturing method according to claim 10, wherein: Before cutting the bar to obtain the blank, the manufacturing method further comprises the following steps: Melting aluminum alloy materials to obtain liquid aluminum alloy; Obtain a casting mold; Injecting liquid aluminum alloy into the casting mold and waiting for solidification to obtain columnar solid aluminum alloy; The columnar solid aluminum alloy is subjected to homogenization annealing to obtain the rod.

15. The manufacturing method according to claim 10, wherein: The valve body block is machined to form a first fluid channel and a second fluid channel; before that, the manufacturing method further includes heat treating the valve body block: Heating the valve body block once, wherein the valve body block is heated to 530° C. within 2 hours and kept at this temperature for 2 hours; Cooling the valve body block once, wherein the valve body block is water-cooled to room temperature within 20 seconds; Secondarily heating the valve body block, wherein the valve body block is heated to 180° C. within 12 hours and kept at this temperature for 2 hours; Heating the valve body block three times, wherein the valve body block is heated to 220° C. within 10 minutes and kept at this temperature for 2 hours; The valve body block is cooled by air.

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