Valve, air conditioner indoor unit and air conditioner

Abstract

The embodiment of the invention discloses a valve, an air conditioner indoor unit and an air conditioner, and belongs to the field of fluid switches. The valve comprises a valve body, a valve cavity is formed in the valve body, the valve body is provided with a first channel, a second channel and a first pipeline, the first channel and the second channel are communicated with the valve cavity, the first pipeline is connected with the first channel, and a first flow channel is formed in the first pipeline; the second pipeline is connected with the second channel, and a second flow channel is formed in the second pipeline; a valve needle is arranged in the valve cavity; and the flow choking piece is used for changing the flowing state of the liquid. According to the embodiment of the invention, the flow blocking piece can change the flowing state of the liquid, so that the liquid cannot make contact with the valve needle or the collision force between the liquid and the valve needle is reduced, and the technical effect of reducing vibration noise is achieved.

Description

Technical Field

[0001] The present application relates to the field of fluid switches, and in particular, to a valve, an air conditioner indoor unit and an air conditioner. Background Art

[0002] Currently, an electronic expansion valve is installed on the inner side of the air conditioner. When the air conditioner is cooling, the electronic expansion valve is used to control the dual-temperature evaporation temperature difference and the refrigerant flow distribution. However, since the refrigerant is in a two-phase state when entering the electronic expansion valve, a two-phase flow noise problem is generated. Summary of the invention

[0003] The embodiments of the present application provide a valve, an air conditioner indoor unit and an air conditioner, so as to at least solve the technical problem of high valve noise.

[0004] According to a first aspect of an embodiment of the present application, a valve is provided for controlling the flow of a flow path, the valve comprising:

[0005] A valve body, wherein a valve cavity is formed inside the valve body, and a first channel and a second channel communicating with the valve cavity are opened on the valve body,

[0006] A valve body, wherein a valve cavity and a first channel and a second channel communicating with the valve cavity are formed inside the valve body, wherein an inlet end of the second channel communicating with the valve cavity forms a valve port;

[0007] a first pipeline, connected to the first channel, for introducing fluid into the valve chamber;

[0008] a second pipe, connected to the second channel, for leading the fluid out of the valve chamber;

[0009] a valve needle, disposed in the valve cavity and cooperating with the valve port to control the flow rate of the fluid flowing out of the second channel;

[0010] The fluid outlet side of the first pipeline close to the valve needle and / or the first channel of the valve body and / or the fluid inlet side of the second pipeline close to the valve needle and / or the second channel of the valve body below the valve needle are provided with a flow blocker, and the flow blocker is used to change the flow state of the liquid to reduce noise.

[0011] With this embodiment, the baffle can change the flow state of the liquid and is located between the first pipe and the valve needle and / or the second pipe and the valve needle, so that when the liquid flows toward the valve needle, the baffle can change the flow state of the liquid, thereby preventing the liquid from contacting the valve needle or reducing the collision force between the liquid and the valve needle, thereby reducing vibration noise.

[0012] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the flow blocking member is a baffle or a filter.

[0013] With this implementation, the baffle can block the liquid, thereby changing the flow path of the liquid, and the filter can filter the liquid, thereby changing the distribution state of gas and liquid in the liquid, so that the flow blocking member can reduce vibration noise.

[0014] In combination with the first aspect, in an optional implementation of the embodiment of the present application, when the blocking member is the baffle, the baffle is used to change the flow direction of at least part of the liquid flowing toward the valve needle, wherein the flow state includes the flow direction.

[0015] In this implementation, the flow-blocking component is set as a baffle. Since the baffle is set inside the valve, it can effectively block the liquid flowing toward the valve needle, causing the flow direction of the liquid flowing toward the valve needle to change, making it less likely to hit the valve needle and generate noise, thereby reducing valve noise.

[0016] In combination with the first aspect, in an optional implementation of the embodiment of the present application, when the baffle is the baffle, the baffle includes a first plate and a second plate, the first plate is connected to the second plate and the connection is an arc surface, and an angle is formed between the first plate and the second plate.

[0017] With this implementation, the arcuate surface helps to ensure the smoothness of the liquid flow, and the formed angle helps to change the flow direction of the liquid, so that the liquid is not likely to directly collide with the valve needle.

[0018] In combination with the first aspect, in an optional implementation of the embodiment of the present application, when the flow blocking member is the filter screen, the filter screen is used to change the gas-liquid distribution state of at least part of the liquid flowing to the valve needle, wherein the flow state includes the gas-liquid distribution state.

[0019] By adopting this implementation method, the filter can improve the distribution uniformity of the gas-liquid two-phase in the liquid, so that the gas-liquid distribution state tends to be uniformly distributed, which helps the liquid to form a bubble flow structure and effectively reduce the liquid flow noise.

[0020] In combination with the first aspect, in an optional implementation of the embodiment of the present application, there are multiple filter screens, and the multiple filter screens are stacked.

[0021] The implementation method is helpful to improve the uniformity of the gas-liquid distribution state, thereby reducing the liquid flow noise.

[0022] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the flow blocking member includes a baffle and a filter, the first pipe is provided with a baffle and a filter on the fluid outlet side of the valve needle and / or the first channel of the valve body, and the second pipe is provided with a baffle and a filter on the fluid inlet side of the valve needle and / or the second channel of the valve body below the valve needle.

[0023] In combination with the first aspect, in an optional implementation of the embodiment of the present application, baffle walls are provided on both sides of the second channel, and the baffle walls have a shape that gradually expands as the distance from the second channel increases.

[0024] By adopting this implementation, the noise caused by the sudden expansion and contraction when the liquid flows through the second channel can be reduced, thereby reducing the noise of the valve.

[0025] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the flow blocking member on the side of the valve needle close to the second pipeline is located on the side of the second channel away from the valve needle.

[0026] The implementation method is adopted to help stabilize the liquid flowing into the second channel, so that the noise generated when the liquid passes through the second channel is reduced.

[0027] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the aspect ratio of the valve needle is between 0.8 and 1.5.

[0028] By adopting this implementation method, the length-to-diameter ratio of the valve needle is limited, so that the valve needle has an overall short and thick structure, which is beneficial to improving the stability of the valve needle under the impact of high-speed two-phase flow, thereby reducing the vibration noise generated by the valve needle, extending the life of the valve needle, and improving the control accuracy of the valve.

[0029] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the tip of the valve needle includes at least one conical end body.

[0030] The implementation method makes the valve needle processing simple and facilitates production.

[0031] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the tip of the valve needle includes a plurality of conical end bodies connected in sequence, and the cone angles of the plurality of conical end bodies are different.

[0032] By adopting this implementation, different numbers of conical end bodies enable the valve needle to be suitable for use in different flow conditions, thereby improving the stability of the valve needle and reducing the vibration noise of the valve needle.

[0033] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the valve includes at least one of an electric expansion valve and an electronic expansion valve.

[0034] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the liquid outflow direction of the first pipeline is perpendicular to the valve needle and / or the liquid outflow direction of the second pipeline is parallel to the movement direction of the valve needle and the tip of the valve needle can block the second channel.

[0035] According to a second aspect of an embodiment of the present application, an air-conditioning indoor unit is provided, comprising the valve described above, wherein the valve is arranged on a flow path of the refrigerant for throttling and reducing pressure.

[0036] By adopting this embodiment, the noise of the valve is small, so that the noise of the air conditioner indoor unit is reduced, which is beneficial to improving the user experience of the air conditioner indoor unit.

[0037] According to a third aspect of an embodiment of the present application, an air conditioner is provided, comprising the air conditioning refrigeration system described above.

[0038] In combination with the third aspect, in an optional implementation of the embodiment of the present application, the air-conditioning refrigeration system is a three-pipe dual-temperature parallel compression system.

[0039] According to a fourth aspect of an embodiment of the present application, a method for controlling an air conditioner is provided, the method comprising:

[0040] Obtain the target opening of the valve;

[0041] Controlling the fans of the indoor and outdoor units of the air conditioner to turn on and the valves to operate to the target opening;

[0042] The air conditioner's compressor starts after a preset target time.

[0043] The technical effects obtained by the above-mentioned third to fourth aspects are similar to the technical effects obtained by the corresponding technical means in the first and second aspects, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the overall structure of a valve provided in an embodiment of the present application;

[0045] Figure 2 It is a partial structural schematic diagram of a valve provided in an embodiment of the present application;

[0046] Figure 3 is a cross-sectional view of a valve needle of a valve provided in an embodiment of the present application;

[0047] Figure 4 is another cross-sectional view of a valve needle of a valve provided in an embodiment of the present application;

[0048] Figure 5 A schematic diagram of the structure of an air conditioner indoor unit provided in an embodiment of the present application;

[0049] Figure 6 A flowchart of a method for controlling an air conditioner provided in an embodiment of the present application;

[0050] Figure 7 It is a valve needle two-fold air flow diagram provided in an embodiment of the present application;

[0051] Figure 8 This is a valve needle non-turning air flow diagram provided in an embodiment of the present application.

[0052] Marking description: 1. first pipeline; 2. second pipeline; 3. valve body; 31. second channel; 4. valve needle; 5. flow blocking member; 51. first plate; 52. second plate; 6. flow blocking wall;

[0053] 100. Indoor heat exchanger; 110. Valve; 120. First four-way valve; 130. Gas-liquid separator; 140. Compressor; 150. Second four-way valve; 160. Outdoor heat exchanger. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0055] It should be understood that the "plurality" mentioned in this article refers to two or more. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; the "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and so on are used to distinguish between the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first", "second" and so on do not limit the quantity and execution order, and the words "first", "second" and so on do not limit certain different

[0056] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0057] The current goals of carbon peak and carbon neutrality have put forward higher requirements on the energy saving of heat pump air-conditioning systems. In order to further improve the refrigeration efficiency of variable frequency air-conditioning and reduce the high-temperature refrigeration exhaust temperature, the three-pipe dual-temperature parallel compression system came into being.

[0058] The system uses an electronic expansion valve on the machine side to control the dual-temperature evaporation temperature difference and refrigerant flow distribution. Since the refrigerant before the valve is in a two-phase state, a two-phase flow noise problem is generated, which will have a certain impact on user comfort.

[0059] Based on this, in order to solve the problem of flow noise of the electronic expansion valve on the machine side of the three-pipe dual-temperature parallel compression system and similar multi-electronic expansion valve system, the embodiment of the present application provides a valve, an air conditioner indoor unit and an air conditioner, which can reduce the flow noise of the electronic expansion valve and improve indoor comfort while taking into account the energy efficiency. Specifically, the embodiment proposes to add a noise reduction filter structure on the inlet and outlet sides, so that the system can break up the two-phase refrigerant fluid passing through the electronic expansion valve into a uniform and stable state in both cooling and heating modes, and can ensure that the refrigerant flow noise can be reduced in different modes.

[0060] This embodiment proposes a type of adding a baffle to the inlet of the electronic expansion valve, which can effectively prevent the vibration noise caused by the high-speed two-phase flow refrigerant directly impacting the valve needle, while extending the service life of the electronic expansion valve and improving the control accuracy.

[0061] This embodiment proposes a type of adding a baffle to the inlet of the electronic expansion valve. The baffle can adopt a filter structure, which can break up the two-phase flow refrigerant with uneven gas-liquid distribution into a bubble flow structure with relatively uniform and stable gas-liquid distribution, effectively reducing the refrigerant flow noise.

[0062] This embodiment proposes that the valve needle of the electronic expansion valve has a short and thick structure, which can improve the stability of the valve needle under the impact of high-speed two-phase flow, reduce the vibration noise generated by the valve needle, and at the same time extend the service life of the electronic expansion valve and improve the control accuracy.

[0063] This embodiment proposes a control method. When the system is started and stopped, the electronic expansion valve has a larger opening / flow area, which can reduce the noise generated by the high flow rate. At the same time, after starting up, the electronic expansion valve can be quickly adjusted to near the target opening, thereby accelerating the system stabilization speed and improving the system energy efficiency.

[0064] The technical solution provided in this embodiment includes at least the following features:

[0065] A method is proposed in which a baffle is added between the inlet pipe and the valve needle of the electronic expansion valve to reduce the vibration noise caused by the impact of the valve needle.

[0066] A method is proposed to add a filter between the inlet pipe and the valve needle of the electronic expansion valve to reduce the refrigerant flow noise.

[0067] A method is proposed to add filters near the valve core in the inlet and outlet pipes of the electronic expansion valve to ensure that the refrigerant flow noise can be reduced in different modes.

[0068] A method is proposed in which a short and thick structure of the valve needle of an electronic expansion valve is used to reduce the vibration noise caused by the impact of the valve needle.

[0069] A target opening calculation method and control method based on system parameters are proposed, which can reduce the noise generated by high flow rate during start-stop, while speeding up the system adjustment speed and improving the system energy efficiency.

[0070] Next, the valve is further described. Figure 1-4 The valve structure shown in the figure is related to the schematic diagram, the valve includes:

[0071] A valve body 3, wherein a valve cavity is formed inside the valve body 3, and a first channel and a second channel 31 communicating with the valve cavity are opened on the valve body 3, wherein an inlet end of the second channel communicating with the valve cavity forms a valve port;

[0072] A first pipeline 1, connected to the first channel, for introducing fluid into the valve chamber;

[0073] A second pipe 2, connected to the second channel 31, for leading the fluid out of the valve chamber;

[0074] A valve needle 4, disposed in the valve cavity and cooperating with the valve port to control the flow rate of the fluid flowing out of the second channel 31;

[0075] The fluid outlet side of the first pipe 1 close to the valve needle 4 and / or the first channel of the valve body 3 and / or the fluid inlet side of the second pipe 2 close to the valve needle 4 and / or the second channel 31 of the valve body 3 below the valve needle 4 is provided with a baffle 5, and the baffle 5 is used to change the flow state of the liquid to reduce noise.

[0076] The first pipe 1 and the valve body 3 can be produced separately and then fixedly connected, and the second pipe 2 and the valve body 3 can be produced separately and then fixedly connected, and the fixed connection method is, for example, welding, which is not specifically limited in this embodiment. In addition, at least one of the first pipe 1 and the second pipe 2 can also be integrally formed with the valve body 3.

[0077] The baffle 5 is intended to change the flow state of the liquid, so the present embodiment does not limit the specific structure and shape of the baffle 5. Specifically, the flow state of the liquid is, for example, the flow direction or the distribution state of the gas-liquid two-phase in the liquid. For ease of understanding, the baffle 5 is such as a plate structure or a filter structure. The liquid can be water, gas or refrigerant, which is not specifically limited in the present embodiment.

[0078] In this embodiment, the baffle 5 can change the flow state of the liquid and is located between the first pipe 1 and the valve needle 4 and / or the second pipe 2 and the valve needle 4, so that when the liquid flows to the valve needle 4, the baffle 5 can change the flow state of the liquid, thereby preventing the liquid from contacting the valve needle 4 or reducing the collision force between the liquid and the valve needle 4, thereby reducing vibration noise.

[0079] In a possible embodiment of the present application, the flow blocking member 5 is a baffle or a filter.

[0080] With this implementation, the baffle can block the liquid, thereby changing the flow path of the liquid, and the filter can filter the liquid, thereby changing the distribution state of gas and liquid in the liquid, so that the flow blocking member 5 can reduce vibration noise.

[0081] Optionally, in an implementation of this embodiment, when the flow blocking member 5 is the baffle, the baffle is used to change the flow direction of at least a portion of the liquid flowing toward the valve needle, wherein the flow state includes the flow direction.

[0082] That is, the baffle is arranged on the side of the valve needle 4 impacted by the liquid, so as to block the liquid and prevent the liquid from directly contacting the valve needle 4 .

[0083] In this implementation, the flow blocking member 5 is set as a baffle. Since the baffle is set inside the valve, it can effectively block the liquid flowing toward the valve needle 4, so that the flow direction of the liquid flowing toward the valve needle 4 changes, making it less likely to hit the valve needle 4 and generate noise, thereby reducing the valve noise.

[0084] Optionally, in an implementation of the present embodiment, when the baffle 5 is the baffle, the baffle includes a first plate 51 and a second plate 52, the first plate 51 is connected to the second plate 52 and the connection is an arc surface, and an angle is formed between the first plate 51 and the second plate 52.

[0085] In one embodiment, the first plate 51 and the second plate 52 form a V-like shape.

[0086] With this implementation, the arc surface helps to ensure the smoothness of the liquid flow, and the formed angle helps to change the flow direction of the liquid, so that the liquid is not likely to directly collide with the valve needle 4.

[0087] Optionally, in an implementation of the present embodiment, when the flow blocking member 5 is the filter screen, the filter screen is used to change the gas-liquid distribution state of at least a portion of the liquid flowing toward the valve needle 4, wherein the flow state includes the gas-liquid distribution state.

[0088] In one embodiment, the filter screen may have a certain thickness and the filter holes are interconnected, so that after the liquid containing gas enters the filter screen, it can shuttle between the filter holes inside the filter screen to achieve uniform distribution of gas and liquid.

[0089] By adopting this implementation method, the filter can improve the distribution uniformity of the gas-liquid two-phase in the liquid, so that the gas-liquid distribution state tends to be uniformly distributed, which helps the liquid to form a bubble flow structure and effectively reduce the liquid flow noise.

[0090] Optionally, in an implementation of this embodiment, there are multiple filter screens, and the multiple filter screens are stacked.

[0091] The implementation method is helpful to improve the uniformity of the gas-liquid distribution state, thereby reducing the liquid flow noise.

[0092] Optionally, in an implementation of the present embodiment, the flow blocking member 5 includes a baffle and a filter, the first pipe 1 is provided with a baffle and a filter on the fluid outlet side close to the valve needle 4 and / or the first channel of the valve body 3, and the second pipe 2 is provided with a baffle and a filter on the fluid inlet side close to the valve needle 4 and / or the second channel 31 of the valve body 3 below the valve needle 4.

[0093] Optionally, in an implementation of this embodiment, baffle walls 6 are provided on both sides of the second channel 31 , and the baffle walls 6 have a shape that gradually expands as the distance from the second channel 31 increases.

[0094] In one embodiment, the baffle wall 6 causes the liquid flow passages on both sides of the second channel 31 for liquid flow to gradually expand.

[0095] In one embodiment, the baffle wall 6 and the valve body 3 are formed integrally.

[0096] By adopting this implementation, the noise caused by the sudden expansion and contraction when the liquid flows through the second channel 31 can be reduced, thereby reducing the noise of the valve.

[0097] Optionally, in an implementation of this embodiment, the flow blocking member 5 on the side of the valve needle 4 close to the second pipeline 2 is located on the side of the second channel 31 away from the valve needle 4 .

[0098] Specifically, the second pipeline 2 may be provided at a pipe opening close to one side of the valve body 3 .

[0099] The implementation method is adopted to help stabilize the liquid flowing into the second channel 31 , so that the noise generated when the liquid passes through the second channel 31 is reduced.

[0100] Optionally, in an implementation of this embodiment, the aspect ratio of the valve needle 4 is between 0.8 and 1.5.

[0101] Preferably, the aspect ratio is between 1 and 1.2.

[0102] By adopting this implementation method, the aspect ratio of the valve needle 4 is limited, so that the valve needle 4 has an overall short and thick structure, which is beneficial to improving the stability of the valve needle 4 under the impact of high-speed two-phase flow, thereby reducing the vibration noise generated by the valve needle 4, extending the life of the valve needle 4, and improving the control accuracy of the valve.

[0103] Optionally, in an implementation of this embodiment, the tip of the valve needle 4 includes at least one conical end body.

[0104] The implementation method makes the valve needle 4 simple to process and facilitates production.

[0105] Optionally, in an implementation of this embodiment, the tip of the valve needle 4 includes a plurality of conical end bodies connected in sequence, and the cone angles of the plurality of conical end bodies are different.

[0106] By adopting this implementation, different numbers of conical end bodies enable the valve needle 4 to be suitable for use in different flow conditions, thereby improving the stability of the valve needle 4 and reducing the vibration noise of the valve needle 4.

[0107] Optionally, in an implementation of this embodiment, the valve includes at least one of an electric expansion valve and an electronic expansion valve.

[0108] Optionally, in an implementation of this embodiment, the liquid outflow direction of the first pipe 1 is perpendicular to the valve needle 4 and / or the liquid outflow direction of the second pipe 2 is parallel to the movement direction of the valve needle 4 and the tip of the valve needle 4 can block the second channel 31.

[0109] The present application also provides an air conditioner indoor unit, such as Figure 5 As shown, it includes the valve 110 mentioned above, and the valve 110 is arranged on the flow path of the refrigerant for throttling and reducing the pressure.

[0110] Preferably, in one embodiment, the air conditioner indoor unit includes an indoor heat exchanger 100, and the valve 110 is arranged on the refrigerant pipeline of the indoor heat exchanger 100. The two sides of the air conditioner indoor unit are also connected to the first four-way valve 120 and the gas-liquid separator 130, respectively. The first four-way valve 120 is connected to the compressor 140, and the compressor 140 is also connected to the second four-way valve 150. The second four-way valve 150 is connected to the outdoor heat exchanger 160, and the outdoor heat exchanger 160 is connected to the gas-liquid separator 130.

[0111] By adopting this embodiment, the noise of the valve is small, so that the noise of the air conditioner indoor unit is reduced, which is beneficial to improving the user experience of the air conditioner indoor unit.

[0112] An embodiment of the present application also provides an air conditioner, comprising the air conditioning refrigeration system described above.

[0113] Optionally, in an implementation of this embodiment, the air-conditioning refrigeration system is a three-pipe dual-temperature parallel compression system.

[0114] The present application also provides a control method for an air conditioner using the above valve. Figure 6 As shown, the method includes:

[0115] S100: Obtain the target opening of the valve.

[0116] The target opening refers to the angle at which the valve needs to be opened. In one embodiment, the target opening can be obtained by user input, or can be determined based on the indoor ambient temperature, the outdoor ambient temperature, the set temperature, the set indoor windshield, and the preset electronic expansion valve control algorithm. The specific calculation process is not limited in this embodiment.

[0117] S102, controlling the fans of the indoor unit and the outdoor unit of the air conditioner to turn on and the valves to operate to the target opening.

[0118] S104: Start the compressor 140 of the air conditioner after the preset target time.

[0119] In one embodiment, after the valve is adjusted to the target opening, the compressor 140 is controlled to start after the target time T1. Preferably, T1 is between 10-120s, preferably 30s.

[0120] In the above-mentioned embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The steps shown in the relevant flow chart can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flow chart, in some cases, the steps shown or described can be executed in an order different from that here. In other words, the order of steps described in the foregoing embodiments is only an example, and it is also within the scope of protection of the embodiments of the present application to reasonably adjust the order of steps based on the content of the embodiments of the present application.

[0121] In a specific implementation of the embodiment of the present application, the valve includes the following structure:

[0122] like Figure 1-4 As shown in 7-8, the valve is an electronic expansion valve as an example for explanation. Under normal circumstances, the horizontal pipe is the inlet pipe and the vertical pipe is the outlet pipe. In the cooling mode of the system, the refrigerant enters horizontally and exits vertically, and in the heating mode, the refrigerant enters vertically and exits horizontally.

[0123] like Figure 1-2 The invention proposes to add a baffle between the inlet pipe of the electronic expansion valve and the valve needle 4, which can effectively prevent the vibration noise generated by the high-speed two-phase flow refrigerant directly impacting the valve needle 4, while extending the service life of the electronic expansion valve and improving the control accuracy.

[0124] The baffle is located at any position in the valve cavity, between the inlet pipe and the valve needle 4, with the standard of not affecting the movement of the valve needle 4.

[0125] The baffle can be a single-sided plate or two folded plates, and the folded plates are connected by rounded corners, which can ensure the smoothness of the refrigerant flow to a certain extent.

[0126] The baffle can also adopt a filter or a multi-layer filter structure, which can break up the two-phase flow refrigerant with uneven gas-liquid distribution into a bubble flow structure with relatively uniform and stable gas-liquid distribution, effectively reducing the refrigerant flow noise.

[0127] like Figure 1 The invention proposes adding filters or multi-layer filter structures on the inlet and outlet sides, so that the system can break up the two-phase refrigerant fluid passing through the electronic expansion valve into a uniform and stable state in both cooling and heating modes, thereby ensuring that the refrigerant flow noise can be reduced in different modes.

[0128] The valve port through hole is arranged in a trumpet-shaped gradually expanding and contracting structure at the front and back, which can reduce the noise caused by sudden expansion and contraction when the refrigerant passes through the valve port. Bell mouths are arranged at the front and back, so that the system can reduce the impact of sudden expansion and contraction on noise under different refrigerant flow conditions in different modes such as cooling and heating.

[0129] like Figure 3 The electronic expansion valve needle 4 of the present invention has a short and thick structure, which can improve the stability of the valve needle 4 under the impact of high-speed two-phase flow, reduce the vibration noise generated by the valve needle 4, and prolong the service life of the electronic expansion valve and improve the control accuracy. Among them, the aspect ratio (lift / valve port diameter) ranges from 0.8 to 1.5, preferably 1 to 1.2.

[0130] The valve needle 4 may be composed of a section of cone, or may be composed of a plurality of sections of cones with different cone angles. Figure 7 , 8 It is a schematic diagram of a valve needle 4 without a turning point and an air flow curve. This structure and processing are simpler. Figure 6 The schematic diagram of the valve needle 4 and the air flow curve is designed in the form of a two-fold structure, wherein the structure before the turning point is suitable for precise control of small flows, and the structure after the turning point is suitable for large flows.

[0131] The sequence of serial numbers or introduction of the embodiments of the present application is for description only and does not represent the superiority or inferiority of the embodiments.

[0132] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0133] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0134] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0135] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access, or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital versatile disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)). It is worth noting that the computer-readable storage medium mentioned in the embodiment of the present application may be a non-volatile storage medium, in other words, a non-transient storage medium.

[0136] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals involved in the embodiments of this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions. For example, the scene data of the current frame in the three-dimensional virtual scene, the device information of the client, and the scene interaction information involved in the embodiments of this application are all obtained with full authorization.

[0137] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A valve for controlling the flow of a flow path, characterized in that: The valve comprises: A valve body, wherein a valve cavity and a first channel and a second channel communicating with the valve cavity are formed inside the valve body, wherein an inlet end of the second channel communicating with the valve cavity forms a valve port; a first pipeline, connected to the first channel, for introducing fluid into the valve chamber; a second pipe, connected to the second channel, for leading the fluid out of the valve chamber; a valve needle, disposed in the valve cavity and cooperating with the valve port to control the flow rate of the fluid flowing out of the second channel; The fluid outlet side of the first pipeline close to the valve needle and / or the first channel of the valve body and / or the fluid inlet side of the second pipeline close to the valve needle and / or the second channel of the valve body below the valve needle are provided with a flow blocker, and the flow blocker is used to change the flow state of the liquid to reduce noise.

2. The valve according to claim 1, characterized in that: The flow blocking element is a baffle or a filter.

3. The valve according to claim 2, characterized in that: When the flow blocking member is the baffle, the baffle is used to change the flow direction of at least a portion of the liquid flowing toward the valve needle, wherein the flow state includes the flow direction.

4. The valve according to claim 3, characterized in that: When the flow blocking member is the baffle, the baffle includes a first plate and a second plate, the first plate is connected to the second plate and the connection is an arc surface, and an angle is formed between the first plate and the second plate.

5. The valve according to claim 2, characterized in that: When the flow blocking member is the filter screen, the filter screen is used to change the gas-liquid distribution state of at least a portion of the liquid flowing toward the valve needle, wherein the flow state includes the gas-liquid distribution state.

6. The valve according to claim 5, characterized in that There are multiple filter screens, and the multiple filter screens are stacked.

7. The valve according to claim 1, characterized in that The flow blocking member includes a baffle and a filter. The first pipe is provided with a baffle and a filter at the fluid outlet side of the valve needle and / or the first channel of the valve body. The second pipe is provided with a baffle and a filter at the fluid inlet side of the valve needle and / or the second channel of the valve body below the valve needle.

8. The valve according to claim 1, characterized in that Flow blocking walls are arranged on both sides of the second channel, and the flow blocking walls have a shape that gradually expands as the distance from the second channel increases.

9. The valve according to claim 8, characterized in that The flow blocking member on the side of the valve needle close to the second pipeline is located on the side of the second channel away from the valve needle.

10. The valve according to claim 1, characterized in that The aspect ratio of the valve needle is 0.8-1.

5.

11. The valve according to claim 1, characterized in that The tip of the valve needle includes at least one conical end body.

12. The valve according to claim 11, characterized in that The tip of the valve needle comprises a plurality of conical end bodies connected in sequence, and the conical angles of the plurality of conical end bodies are different.

13. The valve according to any one of claims 1 to 12, characterized in that: The valve includes at least one of an electric expansion valve and an electronic expansion valve.

14. The valve according to any one of claims 1 to 12, characterized in that: The liquid outflow direction of the first pipeline is perpendicular to the valve needle and / or the liquid outflow direction of the second pipeline is parallel to the moving direction of the valve needle, and the tip of the valve needle can block the second channel.

15. An air conditioning refrigeration system, characterized in that: The invention comprises the valve according to any one of claims 1 to 14, wherein the valve is arranged on the flow path of the refrigerant for throttling and reducing the pressure.

16. An air conditioner, characterized in that: Including the air conditioning and refrigeration system as described in claim 15.

17. The air conditioner according to claim 16, characterized in that: The air conditioning refrigeration system is a three-pipe dual-temperature parallel compression system.

18. A method for controlling an air conditioner using the valve according to any one of claims 1 to 14, characterized in that: The method comprises: Obtain the target opening of the valve; Controlling the fans of the indoor and outdoor units of the air conditioner to turn on and the valves to operate to the target opening; The air conditioner's compressor starts after a preset target time.

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