Two-way throttle valve, first air conditioning system and second air conditioning system

Abstract

A bidirectional throttle valve (100) and an air conditioning system (200) having the same. The bidirectional throttle valve (100) includes a valve pipe (10), a first valve core (22) and an inner wall of a first valve port (211) cooperate to form a first flow passage, a second valve core (32) and an inner wall of a second valve port (311) cooperate to form a second flow passage, and when the first valve port (211) and the second valve port (311) are opened, the flow area of ​​the first flow passage is larger than the flow area of ​​the second flow passage, and the second valve core (32) and the second valve port (311) cooperate to realize throttling. The present application further provides an air conditioning system (200) including the above bidirectional throttle valve (100).

Description

[Technical Field]

[0001] Related Applications This application claims priority to a Chinese patent application filed on November 5, 2021, bearing application number 202111307151.8 and entitled "Bidirectional Throttle Valve, First Air Conditioning System and Second Air Conditioning System," and a Chinese patent application filed on November 5, 2021, bearing application number 202122707906.5 and entitled "Bidirectional Throttle Valve, First Air Conditioning System and Second Air Conditioning System," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of valves, and in particular to a two-way throttle valve, a first air conditioning system, and a second air conditioning system. [Background technology]

[0003] The throttle valve is mainly used in the cooling system of air conditioning and is an important component of the cooling system. The bidirectional throttle valve is mainly used in the cooling and heating air conditioning system, where two throttle valve assemblies are installed in parallel or in series to achieve bidirectional flow function.

[0004] The related one-way throttle valves and two-way throttle valves both have limitations in their functions. One-way throttle valves can only achieve one-way flow, while two-way throttle valves have a small flow rate when two-way flow is achieved, so they cannot meet the requirements for two-way flow and one-way throttle of some models, or the requirements for low pressure and large flow rate on the defrosting side under defrosting operating conditions. Summary of the Invention

[0005] According to various embodiments of the present application, a bidirectional throttle valve is provided.

[0006] This application includes a valve pipe, and a first valve core assembly and a second valve core assembly are respectively provided at both ends in the valve pipe. The first valve core assembly includes a first valve core, and there is a first valve port in the first valve core assembly. The first valve core is movably provided in the valve pipe and can open and close the first valve port. The first valve core and the inner wall of the first valve port cooperate to form a first flow passage. The second valve core assembly includes a second valve core, and there is a second valve port in the second valve core assembly. The second valve core is movably provided in the valve pipe and can open and close the second valve port. The second valve core and the inner wall of the second valve port cooperate to form a second flow passage. When the first valve port and the second valve port are opened, the flow area of the first flow passage is larger than that of the second flow passage, and a two-way throttle valve is provided in which the second valve core and the second valve port cooperate to achieve throttling.

[0007] In one embodiment, the valve pipe is connected to the pipeline of the air conditioning system, and a communication member is further provided in the valve pipe. The first valve core assembly is attached to one end of the communication member. A first passage is provided in the communication member, and the first passage communicates with the first valve port. If the diameter of the first valve port is D1, the diameter of the first passage is D2, and the diameter of the pipeline of the air conditioning system is D3, then D1, D2, and D3 satisfy the relational expression D2≧D1≧D3.

[0008] In one embodiment, the valve pipe is connected to the pipeline of the air conditioning system, and a communication member is further provided in the valve pipe. The first valve core assembly is attached to one end of the communication member. If the diameter of the first valve port is D1 and the diameter of the pipeline of the air conditioning system is D3, then D1 and D3 satisfy the relational expression D1<D3.

[0009] In one embodiment, if the diameter of the second valve port is D4, then D1 and D4 satisfy the relational expression D4>D1>(1 / 3)D4.

[0010] In one embodiment, the first valve core assembly includes a first valve seat. The first valve core is movably provided in the first valve seat, the first valve port is drilled in the first valve seat, and the flow area S1 of the gap between the side wall of the first valve core and the inner wall of the first valve seat is larger than the flow area S2 of the first valve port.

[0011] In one embodiment, the second valve core assembly includes a second valve seat, the second valve core is movably disposed within the second valve seat, a second valve port is drilled in the second valve seat, and the flow area of ​​the gap between the side wall of the second valve core and the inner wall of the second valve seat is smaller than the flow area of ​​the second valve port.

[0012] In one embodiment, the first valve core assembly includes a first valve seat, the first valve core is movably disposed within the first valve seat, and a first sealing head is disposed at one end of the first valve seat away from the second valve core assembly so as to cover that end.

[0013] In one embodiment, the second valve core assembly includes a second valve seat, the second valve core is movably disposed within the second valve seat, and a second sealing head and an elastic member are further disposed within the second valve seat, the second sealing head is disposed at one end of the second valve seat away from the first valve core assembly, and both ends of the elastic member abut against the second valve core and the second sealing head respectively, so that the second valve core tends to reduce the flow area of ​​the second flow passage.

[0014] In one embodiment, the first passage is provided as a linear passage inclined with respect to the axial direction of the communication member.

[0015] The present application further provides a first air conditioning system including a compressor, a first heat exchanger, a second heat exchanger, a four-way valve, and at least two bidirectional throttle valves, the bidirectional throttle valves including a first bidirectional throttle valve and a second bidirectional throttle valve, the first heat exchanger is connected between a C port of the four-way valve and an end of the first bidirectional throttle valve close to a second valve core assembly, the second heat exchanger is connected between an E port of the four-way valve and an end of the second bidirectional throttle valve close to the second valve core assembly, the end of the first bidirectional throttle valve close to the first valve core assembly and the end of the second bidirectional throttle valve close to the first valve core assembly are connected to each other, and the compressor is connected between a D port of the four-way valve and an S port of the four-way valve.

[0016] In one embodiment, there are at least two second heat exchangers and at least two second two-way throttle valves, each second heat exchanger is connected between the E port of the four-way valve and one end of each second two-way throttle valve close to the second valve core assembly, and one end of each second two-way throttle valve close to the first valve core assembly is connected to each other.

[0017] The present application further provides a second air conditioning system including a compressor, a first heat exchanger, a second heat exchanger, a four-way valve, and at least one bidirectional throttle valve, wherein the first heat exchanger is connected between a C port of the four-way valve and one end of the bidirectional throttle valve close to a first valve core assembly, the second heat exchanger is connected between an E port of the four-way valve and one end of the bidirectional throttle valve close to a second valve core assembly, and the compressor is connected between a D port of the four-way valve and an S port of the four-way valve.

[0018] The details of one or more embodiments of the application are set forth in the drawings and description below. Other features, objects, and advantages of the application will become apparent from the description, drawings, and claims. [Brief explanation of the drawings]

[0019] To better describe and explain the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more drawings. Any additional details or examples used to illustrate the drawings should not be considered as limiting the scope of any of the disclosed inventions, the embodiments and / or examples described herein, and the best mode of these inventions as understood herein.

[0020] [Figure 1] 1 is a schematic diagram of a two-way throttle valve provided by the present application; [Figure 2] 1 is a schematic diagram of the bidirectional flow direction of a bidirectional throttle valve provided by the present application. FIG. [Figure 3] 1 is a schematic diagram showing the internal structure of a valve pipe of a two-way throttle valve provided by the present application; FIG. [Figure 4] 1 is a schematic diagram illustrating the configuration of a communication member provided by the present application. [Figure 5] 1 is a schematic diagram of a first valve seat provided by the present application; [Figure 6] FIG. 2 is a schematic diagram of the configuration of a second valve seat provided by the present application. [Figure 7] FIG. 2 is a schematic diagram of a cross section taken along line AA in FIG. [Figure 8] FIG. 2 is a schematic diagram of a cross section of BB in FIG. [Figure 9] 1 is a schematic diagram of a first air conditioning system provided by the present application. [Figure 10] FIG. 10 is an enlarged schematic view of a portion X in FIG. 9. [Figure 11] FIG. 10 is a partially enlarged schematic view of Y in FIG. [Figure 12] FIG. 2 is a schematic diagram of a second air conditioning system provided by the present application.

[0021] The meanings of the symbols in the drawings are as follows: 100 two-way throttle valve, 10 valve pipe, 11 first valve chamber, 12 second valve chamber, 20 first valve core assembly, 21 first valve seat, 211 first valve port, 212 first valve seat chamber, 22 first valve core, 23 first sealing head, 30 second valve core assembly, 31 second valve seat, 311 second valve port, 312 second valve seat chamber, 32 second valve core, 33 second sealing head, 34 elastic member, 40 connecting member, 41 first passage, 42 second passage, 43 first chamber, 44 second chamber, 200 air conditioning system, 201 first air conditioning system, 202 second air conditioning system, 50 compressor, 60 first heat exchanger, 61 second heat exchanger, 70 four-way valve, 80 first two-way throttle valve, 81 second two-way throttle valve, 90 pipeline of air conditioning system. DETAILED DESCRIPTION OF THE INVENTION

[0022] In order to make the objectives, technical aspects and advantages of the present application clearer, the present application will be described in more detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for interpreting the present application and do not limit the protection scope of the present application.

[0023] It should be understood that when an assembly is referred to as being "attached" to another assembly, it may be directly attached to the other assembly, or there may be an intervening assembly. When an assembly is referred to as being "mounted" to another assembly, it may be directly mounted to the other assembly, or there may also be an intervening assembly. When an assembly is referred to as being "secured" to another assembly, it may be directly secured to the other assembly, or there may also be an intervening assembly. The terms "vertical," "horizontal," "left," "right," and similar terms used herein are for descriptive purposes only and do not represent the only embodiments.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. Herein, the terms used in the specification of this application are merely for the purpose of describing specific embodiments and are not intended to limit the scope of this application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0025] 1 to 12, a bidirectional throttle valve 100 provided by an embodiment of the present application is applied to an air conditioning system 200, mainly for heating and cooling type air conditioning systems 200, and two throttle valve assemblies are provided in parallel or in series to achieve bidirectional flow function.

[0026] The related one-way throttle valves and two-way throttle valves both have limitations in their functions. One-way throttle valves can only achieve one-way flow, while two-way throttle valves have a small flow rate when two-way flow is achieved, so they cannot meet the requirements for two-way flow and one-way throttle of some models, or the requirements for low pressure and large flow rate on the defrosting side under defrosting operating conditions.

[0027] In order to solve the problems existing in related bidirectional throttle valves, one embodiment of the present application includes a valve pipe 10, and a first valve core assembly 20 and a second valve core assembly 30 are respectively provided at both ends of the valve pipe 10. The first valve core assembly 20 includes a first valve core 22, and a first valve port 211 is provided in the first valve core assembly 20. The first valve core 22 is movably provided in the valve pipe 10 to open and close the first valve port 211. The first valve core 22 and the inner wall of the first valve port 211 cooperate to form a first flow passage, and a second valve The core assembly 30 includes a second valve core 32, and the second valve core assembly 30 includes a second valve port 311. The second valve core 32 is movably mounted within the valve pipe 10 and can open and close the second valve port 311. The second valve core 32 and the inner wall of the second valve port 311 cooperate to form a second flow passage. When the first valve port 211 and the second valve port 311 are opened, the flow area of ​​the first flow passage is larger than the flow area of ​​the second flow passage. The second valve core 32 and the second valve port 311 cooperate to provide a two-way throttle valve 100 that achieves throttling.

[0028] In the present application, when the first valve port 211 and the second valve port 311 are opened, the flow area of ​​the first flow passage is made larger than the flow area of ​​the second flow passage, thereby increasing the flow rate and realizing the two-way flow and one-way throttling functions of the bidirectional throttle valve 100. Even when the bidirectional throttle valve 100 is in a defrosting operating condition, the low pressure and large flow rate requirements can be met.

[0029] As shown in FIGS. 1 and 4 , a communicating member 40 is further provided within the valve pipe 10. The communicating member 40 is provided within the valve pipe 10 and divides the interior of the valve pipe 10 into a first valve chamber 11 and a second valve chamber 12. The communicating member 40 is provided with a first chamber 43, a second chamber 44, a first passage 41, and a second passage 42. The first chamber 43 is provided at one end of the communicating member 40 closer to the first valve chamber 11, and the second chamber 44 is provided at one end of the communicating member 40 closer to the second valve chamber 12. The first passage 41 connects the first chamber 43 to the second valve chamber 12, and the second passage 42 connects the second chamber 44 to the first valve chamber 11. The first valve core assembly 20 is attached to the first chamber 43 and is used to automatically adjust the amount of flow between the first passage 41 and the first valve chamber 11. The second valve core assembly 30 is attached to the second chamber 44 and is used to adjust the amount of fluid flow between the second passage 42 and the second valve chamber 12 .

[0030] 2, when the bidirectional throttle valve 100 is operated, fluid can flow from the first valve chamber 11 to the second passage 42, then into the second chamber 44, then into the second valve core assembly 30, and finally into the second valve chamber 12. Fluid can also flow from the second valve chamber 12 to the first passage 41, then into the first chamber 43, then into the first valve core assembly 20, and finally into the first valve chamber 11. In this way, the bidirectional throttle valve 100 can achieve the role of bidirectional flow by using the valve pipe 10, the connecting member 40, the first valve core assembly 20, and the second valve core assembly 30, with few parts and a very simple structure. During installation, the assembly of the bidirectional throttle valve 100 can be completed simply by installing the connecting member 40 inside the valve pipe 10 and then installing the first valve core assembly 20 and the second valve core assembly 30 on either end of the connecting member 40. The installation process is very simple, reducing the chance of defects occurring during the assembly process and favoring improved product consistency, thereby significantly reducing the production cost of the bidirectional throttle valve 100. "Product consistency" refers to the basic consistency between different products during mass production.

[0031] 3 and 4, the first passage 41 is provided as a straight passage inclined with respect to the axial direction of the communicating member 40. This reduces flow resistance when the fluid flows through the first passage 41, improving the stability of the bidirectional throttle valve 100. Correspondingly, the second passage 42 is also provided as a straight passage inclined with respect to the axial direction of the communicating member 40. Similarly, this reduces flow resistance when the fluid flows through the second passage 42, improving the stability of the bidirectional throttle valve 100.

[0032] In this embodiment, the communicating member 40, the first valve core assembly 20, and the second valve core assembly 30 are arranged coaxially. This arrangement reduces the overall space occupied by the communicating member 40, the first valve core assembly 20, and the second valve core assembly 30, which is advantageous for the miniaturization of the valve pipe 10 and significantly reduces the space occupied by the bidirectional throttle valve 100.

[0033] 3 and 5, the first valve core assembly 20 includes a first valve seat 21. The first valve seat 21 contains a first valve seat chamber 212, the first valve core 22 is movably disposed within the first valve seat chamber 212, and a first valve port 211 is formed in the first valve seat 21. A first sealing head 23 is disposed at one end of the first valve seat 21 remote from the second valve core assembly 30 to cover the end, and a gap is left between the first sealing head 23 and the first valve seat 21, connecting the first valve seat chamber 212 and the first valve chamber 11 so that a fluid can pass through. When the flow area of ​​the first valve port 211 decreases to zero, the first valve port 211 is closed. When the pressure of the fluid in the first passage 41 is greater than the weight of the first valve core 22, the fluid moves the first valve core 22 to open the first valve port 211 or increase the flow area of ​​the first valve port 211, and flows from the first passage 41 through the first valve port 211 and the first valve seat chamber 212, and finally into the first valve chamber 11. When the pressure of the fluid in the first passage 41 is less than the weight of the first valve core 22, the first valve core 22 moves in the opposite direction to decrease the flow area of ​​the first valve port 211 and then close it.

[0034] 6, the second valve core assembly 30 includes a second valve seat 31. A second valve seat chamber 312 is provided within the second valve seat 31, and the second valve core 32 is movably disposed within the second valve seat chamber 312. A second valve port 311 is formed in the second valve seat 31. A second sealing head 33 is provided to cover one end of the second valve seat 31 remote from the first valve core assembly 20, and a gap is left between the second sealing head 33 and the second valve seat 31, allowing fluid to pass through between the second valve seat chamber 312 and the second valve chamber 12.

[0035] Furthermore, an elastic member 34 is further provided within the second valve seat 31. Both ends of the elastic member 34 abut against the second valve core 32 and the second sealing head 33, respectively, so that the second valve core 32 tends to reduce the flow area of ​​the second flow passage. When the flow area of ​​the second valve port 311 becomes zero, the second valve port 311 is closed; when the flow area of ​​the second valve port 311 is greater than zero, the second valve port 311 is open. Adjusting the flow area of ​​the second valve port 311 includes not only adjusting the flow area when the second valve port 311 is open, but also switching the second valve port 311 between the open and closed states. When the flow area of ​​the second valve port 311 decreases to zero, the second valve port 311 is closed. When the pressure of the fluid in the second passage 42 is greater than the elastic force of the elastic member 34, the fluid moves the second valve core 32, compressing the elastic member 34 and opening the second valve port 311 or increasing the flow area of ​​the second valve port 311. The greater the pressure of the fluid in the second passage 42, the larger the flow area of ​​the second valve port 311. Therefore, the fluid flows from the second passage 42 through the second valve port 311 and the second valve seat chamber 312, and finally enters the second valve chamber 12. When the pressure of the fluid in the second passage 42 is less than the elastic force of the elastic member 34, the elastic restoring force of the elastic member 34 causes the second valve core 32 to move in the opposite direction, reducing the flow area of ​​the second valve port 311 and closing it.

[0036] The associated two-way throttle valve usually has a two-way flow and two-way throttle structure, so the fluid flow rate is usually small. Under the defrosting operation conditions of the air conditioning system 200, usually enough fluid is required to defrost the condensate in the air conditioning system 200. If the two-way throttle valve 100 performs two-way throttling, it will not be able to meet the requirement for a large flow rate under the defrosting operation conditions.

[0037] Of the two valve core assemblies in the bidirectional throttle valve 100, one valve core assembly is of a full-flow or orifice throttle structure, and the other valve core assembly is of a throttle structure. It should be noted that the flow rate of the full-flow structure or the orifice throttle structure is larger than that of the throttle structure. This allows the bidirectional throttle valve 100 to not only accommodate throttle, but also accommodate a large flow rate under defrosting conditions.

[0038] In this embodiment, the first valve core assembly 20 has a full flow or orifice restriction structure. In other embodiments, the second valve core assembly 30 may have a full flow or orifice restriction structure, and this is not limited thereto.

[0039] When the first valve core assembly 20 achieves full flow, D1 represents the diameter of the first valve port 211, D2 represents the diameter of the first passage 41, and D3 represents the diameter of the air conditioning system pipeline 90. D1, D2, and D3 satisfy the relationship D2 ≥ D1 ≥ D3 when designing the diameters of the first valve port 211 and the first passage 41. By ensuring that D1, D2, and D3 satisfy the relationship D2 ≥ D1 ≥ D3 when designing the diameters of the first valve port 211 and the first passage 41, when the first valve port 211 is opened, the first valve core assembly 20 will not throttle and will achieve full flow.

[0040] When the fluid flows from the air conditioning system pipeline 90 into the second valve chamber 12, the fluid flows into the first passage 41 through the gap between the second valve seat 31 and the valve pipe 10, and since the diameter of the first passage 41 is larger than the diameter of the air conditioning system pipeline 90, in this case the flow area is larger and full flow is realized.

[0041] When the first valve core assembly 20 realizes an orifice throttle, if the diameter of the first valve port 211 is D1 and the diameter of the pipeline 90 of the air-conditioning system is D3, then D1 and D3 satisfy the relational expression D1 < D3. When designing the diameter of the first valve port 211, by making D1 and D3 satisfy the relational expression D1 < D3, when the first valve port 211 is opened, the first valve core assembly 20 can partially throttle and realize an orifice throttle.

[0042] When the fluid flows from the pipeline 90 of the air-conditioning system into the second valve chamber 12, the fluid flows into the first valve port 211 from the gap between the second valve seat 31 and the valve pipe 10. Since the diameter of the first valve port 211 is smaller than the diameter of the pipeline 90 of the air-conditioning system, in this case, the flow area becomes smaller and an orifice throttle is realized.

[0043] Furthermore, in order for the first valve core assembly 20 to better realize an orifice throttle, if the diameter of the second valve port 311 is D4, then D1 and D4 satisfy the relational expression D4 > D1 > (1 / 3)D4. When designing the diameters of the first valve port 211 and the second valve port 311, by making D1 and D4 satisfy the relational expression D4 > D1 > (1 / 3)D4, when the first valve port 211 is opened, further orifice throttle can be realized at the first valve port 211.

[0044] When the fluid flows from the pipeline 90 of the air-conditioning system into the first valve chamber 11 for the second valve core assembly 30 with a throttle structure, the fluid flows into the second valve port 311 from the gap between the first valve seat 21 and the valve pipe 10. Since the diameter of the second valve port 311 is also smaller than the diameter of the pipeline 90 of the air-conditioning system, in this case too, the flow area becomes smaller and a throttle is realized. The reason why the flow rate of the second valve core assembly 30 is smaller than the flow rate of the first valve core assembly 20 when the flow rate of the second valve core assembly 30 is still designed as an orifice throttle is mainly due to the following structural differences between the first valve core assembly 20 and the second valve core assembly 30.

[0045] 7 and 8, first, the difference in flow area is explained. The flow area S1 of the gap between the side wall of the first valve core 22 and the inner wall of the first valve seat 21 is larger than the flow area S2 of the first valve orifice 211. The flow area of ​​the gap between the side wall of the second valve core 32 and the inner wall of the second valve seat 31 is smaller than the flow area of ​​the second valve orifice 311. Based on this, it can be seen that, due to the pressure difference, the process of fluid pushing open the first valve core 22 is significantly easier than the process of fluid pushing open the second valve core 32. Therefore, the open passage area of ​​the first valve orifice 211 must be larger than the open passage area of ​​the second valve orifice 311, and therefore the flow rate of the first valve core assembly 20 must be larger than the flow rate of the second valve core assembly 30.

[0046] Next, regarding the difference in elastic structure, only the first valve core 22 is provided within the first valve seat chamber 212, which is movable within the first valve seat chamber 212. In other words, when the fluid pushes the first valve core 22 open through the first valve port 211, it only needs to overcome the gravity of the first valve core 22 itself, and since the first valve core 22 is not connected to any other components, after the fluid pushes open the first valve core 22, the impact force of the fluid gradually becomes smaller than the gravity of the first valve core 22, and the first valve core 22 will not move toward the first valve port 211, and in this case, a high-flow passage is realized at the first valve port 211. In addition to the second valve core 32, the second valve seat chamber 312 is provided with an elastic member 34 whose ends are connected to the second sealing head 33 and the second valve core 32, respectively. In other words, when the fluid pushes the second valve core 32 open through the second valve port 311, in addition to overcoming the gravity of the second valve core 32 itself, it also needs to overcome the elastic force of the elastic member 34. After the fluid pushes open the second valve core 32, the second valve core 32 will also tend to move toward the second valve port 311 due to the elastic restoring force of the elastic member 34, which also causes the flow rate at the second valve port 311 to gradually decrease.

[0047] In summary, since the first valve core assembly 20 and the second valve core assembly 30 have different flow areas and elastic structures, even if the first valve port 211 is designed as an orifice restriction structure, the flow rate at the first valve port 211 is still greater than the flow rate at the second valve port 311.

[0048] Optionally, the elastic member 34 is a spring, but in other embodiments, the elastic member 34 may have other elastic structures, and is not limited thereto.

[0049] As shown in FIGS. 9 to 11 , the present application includes a compressor 50, a first heat exchanger 60, a second heat exchanger 61, a four-way valve 70, and a bidirectional throttle valve 100. The bidirectional throttle valve 100 includes a first bidirectional throttle valve 80 and a second bidirectional throttle valve 81. The first heat exchanger 60 is connected between a C port of the four-way valve 70 and one end of the first bidirectional throttle valve 80 that is close to the second valve core assembly 30. The second heat exchanger 61 is connected between an E port of the four-way valve 70 and one end of the first bidirectional throttle valve 80 that is close to the second valve core assembly 30. The compressor 50 further provides a first air conditioning system 201 connected between the D port of the four-way valve 70 and the S port of the four-way valve 70. The first two-way throttle valve 80 is connected between an end of the first two-way throttle valve 80 that is close to the second valve core assembly 30 of the second two-way throttle valve 81, and an end of the first two-way throttle valve 80 that is close to the first valve core assembly 20 of the first two-way throttle valve 80 and an end of the second two-way throttle valve 81 that is close to the first valve core assembly 20 of the second two-way throttle valve 81 are connected to each other.

[0050] The first air conditioning system 201 is mainly a system with many components and a long air conditioning system pipeline 90, and the bidirectional throttle valve 100 applied in this case is a bidirectional throttle valve 100 with one end being throttled and the other end being full flow. When the first air conditioning system 201 performs cooling, low-temperature, low-pressure gas is compressed by the compressor 50 to form high-temperature, high-pressure gas. The high-temperature, high-pressure gas passes through the four-way valve 70 and enters the first heat exchanger 60, where it is condensed into a medium-temperature, high-pressure liquid. The medium-temperature, high-pressure liquid enters the second valve chamber 12 of the first two-way throttle valve 80, passes through the gap between the second valve seat 31 and the valve pipe 10, enters the first passage 41, and then enters the first valve port 211. At this time, the medium-temperature, high-pressure liquid pushes open the first valve core 22, enters the first valve seat chamber 212, and then enters the first valve chamber 11. Since the fluid is in full flow at the first valve port 211, the flow of the medium-temperature, high-pressure liquid through the first two-way throttle valve 80 is equivalent to flowing through the air conditioning system pipeline 90, and no throttling action occurs. The medium-temperature, high-pressure liquid flows from the first valve chamber 11 of the first two-way throttle valve 80 into the first valve chamber 11 of the second two-way throttle valve 81, passes through the gap between the first valve seat 21 and the valve pipe 10, enters the second passage 42, and then flows into the second valve port 311, opens the second valve core 32, flows into the second valve seat chamber 312, and finally enters the second valve chamber 12. The medium-temperature, high-pressure liquid is throttled to a low-temperature, low-pressure liquid at the second valve port 311 and enters the second heat exchanger 61, where it is evaporated to form a low-temperature, low-pressure gas, which finally enters the compressor 50 via the four-way valve 70, completing the refrigeration cycle.

[0051] When the first air conditioning system 201 performs heating, low-temperature, low-pressure gas is compressed by the compressor 50 to form high-temperature, high-pressure gas. The high-temperature, high-pressure gas passes through the four-way valve 70 and enters the second heat exchanger 61, where it dissipates heat into a medium-temperature, high-pressure liquid. The medium-temperature, high-pressure liquid enters the second valve chamber 12 of the second two-way throttle valve 81, passes through the gap between the second valve seat 31 and the valve pipe 10, enters the first passage 41, and then enters the first valve port 211. At this time, the medium-temperature, high-pressure liquid pushes open the first valve core 22, enters the first valve seat chamber 212, and then enters the first valve chamber 11. Because the fluid is in full flow at the first valve port 211, the flow of the medium-temperature, high-pressure liquid through the second two-way throttle valve 81 is equivalent to flowing through the air conditioning system pipeline 90, and no throttling action occurs. The medium-temperature, high-pressure gas flows from the first valve chamber 11 of the second two-way throttle valve 81, into the first valve chamber 11 of the first two-way throttle valve 80, passes through the gap between the first valve seat 21 and the valve pipe 10, enters the second passage 42, and then flows into the second valve port 311, pushing open the second valve core 32, and then flows into the second valve seat chamber 312, and finally into the second valve chamber 12. The medium-temperature, high-pressure liquid is throttled at the second valve port 311 into a low-temperature, low-pressure liquid or gas-liquid two-phase medium, enters the first heat exchanger 60, and is evaporated by the first heat exchanger 60 to form a low-temperature, low-pressure gas, which finally enters the compressor 50 via the four-way valve 70, completing the heating cycle.

[0052] A pipeline in which the second heat exchanger 61 and the second bidirectional throttle valve 81 are connected in series may also be connected in parallel, with the specific number being determined according to the specific circumstances of the air conditioning system 200. That is, the first air conditioning system 201 includes at least two second heat exchangers 61 and at least two second bidirectional throttle valves 81, each second heat exchanger 61 being connected between the E port of the four-way valve 70 and one end of each second bidirectional throttle valve 81 that is closer to the second valve core assembly 30, and one end of each second bidirectional throttle valve 81 that is closer to the first valve core assembly 20 is connected to each other.

[0053] The two-way throttle valve 100, in which the first valve core assembly 20 is full flow and the second valve core assembly 30 is throttle, is applied to the first air conditioning system 201, mainly in multi-purpose cases. This solves the problem that when the pipeline 90 of the air conditioning system is long and the heating and cooling circulations share one two-way throttle valve 100, a significant loss of cooling capacity occurs along the way.

[0054] As shown in FIG. 12 , the present application further provides a second air conditioning system 202, which includes a compressor 50, a first heat exchanger 60, a second heat exchanger 61, a four-way valve 70, and one bidirectional throttle valve 100, wherein the first heat exchanger 60 is connected between a C port of the four-way valve 70 and one end of the bidirectional throttle valve 100 that is closer to the first valve core assembly 20 of the bidirectional throttle valve 100, the second heat exchanger 61 is connected between an E port of the four-way valve 70 and one end of the bidirectional throttle valve 100 that is closer to the second valve core assembly 30 of the bidirectional throttle valve 100, and the compressor 50 is connected between a D port of the four-way valve 70 and an S port of the four-way valve 70.

[0055] The second air conditioning system 202 is mainly a system with fewer components and a shorter air conditioning system pipeline 90, and the bidirectional throttle valve 100 applied in this case is a bidirectional throttle valve 100 with one end being a throttle and the other end being an orifice throttle. When the second air conditioning system 202 performs cooling, low-temperature, low-pressure gas is compressed by the compressor 50 to form high-temperature, high-pressure gas. The high-temperature, high-pressure gas enters the first heat exchanger 60 through the four-way valve 70 and is condensed into medium-temperature, high-pressure liquid by the first heat exchanger 60. The medium-temperature, high-pressure liquid enters the first valve chamber 11 of the bidirectional throttle valve 100, passes through the gap between the first valve seat 21 and the valve pipe 10, flows into the second passage 42, and then enters the second valve port 311. At this time, the medium-temperature, high-pressure liquid pushes open the second valve core 32 to , enters the second valve seat chamber 312, and then enters the second valve chamber 12. The fluid is throttled at the second valve port 311, so that the medium-temperature, high-pressure liquid flows through the two-way throttle valve 100 and is throttled into a low-temperature, low-pressure liquid or a low-temperature, low-pressure gas-liquid two-phase state. The medium-temperature, high-pressure liquid then flows out of the second valve chamber 12 of the two-way throttle valve 100 and into the second heat exchanger 61, where it is evaporated to form low-temperature, low-pressure vapor. Finally, the medium-temperature, high-pressure liquid flows through the four-way valve 70 and enters the compressor 50, completing the refrigeration cycle.

[0056] When the second air conditioning system 202 performs defrosting, the low-temperature, low-pressure gas is compressed by the compressor 50 to form high-temperature, high-pressure gas. The high-temperature, high-pressure gas passes through the four-way valve 70 and enters the second heat exchanger 61, where it is condensed into a medium-temperature, high-pressure liquid. The medium-temperature, high-pressure liquid enters the second valve chamber 12 of the two-way throttle valve 100, passes through the gap between the second valve seat 31 and the valve pipe 10, flows into the first passage 41, and then enters the first valve port 211. At this time, the medium-temperature, high-pressure liquid pushes open the first valve core 22 and flows into the first valve seat chamber 212. After entering the chamber 212, the fluid enters the first valve chamber 11. At the first valve port 211, the fluid is throttled by the orifice to become a low-temperature, low-pressure liquid or gas-liquid two-phase medium. At this time, the flow area increases, and the fluid volume increases accordingly. The low-temperature, low-pressure liquid or gas-liquid two-phase medium flows out of the first valve chamber 11 of the two-way throttle valve 100 and into the first heat exchanger 60. It is evaporated by the first heat exchanger 60 to form a low-temperature, low-pressure gas, and finally enters the compressor 50 through the four-way valve 70, completing the defrosting circulation.

[0057] The two-way throttle valve 100, in which the first valve core assembly 20 is an orifice throttle and the second valve core assembly 30 is a throttle, is applied to the second air conditioning system 202, mainly in the case of refrigeration and freezing, thereby solving the problem of needing to significantly increase the refrigerant flow rate when defrosting the air conditioning system 200 in a long-term cooling environment.

[0058] It should be noted that the above air conditioning system 200 may be a first air conditioning system 201 or a second air conditioning system 202.

[0059] The bidirectional throttle valve 100 provided by the present application not only achieves the bidirectional flow and one-way throttling function of the bidirectional throttle valve 100 by making the flow area of ​​the first flow passage larger than the flow area of ​​the second flow passage when the first valve port 211 and the second valve port 311 are open, but also meets the requirements for low pressure and large flow rate under defrosting operating conditions.

[0060] The technical features of the above-described embodiments can be combined in any desired manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, any combination should be considered within the scope described in this specification.

[0061] The above examples merely illustrate some embodiments of the present application, and although the descriptions are relatively specific and detailed, they should not be understood as limiting the scope of the claims of the present application. It should be noted that those skilled in the art may make some modifications and improvements without departing from the spirit of the present application, and all of them will fall within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be determined according to the scope of the attached claims.

Claims

1. a valve pipe, a first valve core assembly and a second valve core assembly are respectively provided at both ends of the valve pipe, the first valve core assembly includes a first valve core, a first valve port is provided within the first valve core assembly, the first valve core is movably provided within the valve pipe to open and close the first valve port, and the first valve core and an inner wall of the first valve port cooperate to form a first flow passage; The second valve core assembly includes a second valve core, and a second valve port is located within the second valve core assembly. The second valve core is movably disposed within the valve pipe to open and close the second valve port, and the second valve core and an inner wall of the second valve port cooperate to form a second flow passage. When the first valve port and the second valve port are opened, the flow area of ​​the first flow passage is larger than the flow area of ​​the second flow passage, and the second valve core and the second valve port cooperate to achieve throttling; The valve pipe is connected to a pipeline of an air conditioning system, and a connecting member is further provided within the valve pipe, and the first valve core assembly is attached to one end of the connecting member; a first passage provided in the communication member, the first passage communicating with the first valve port; A bidirectional throttle valve, wherein D1, D2, and D3 satisfy the relational expression D2≧D1≧D3, where D1 is the diameter of the first valve port, D2 is the diameter of the first passage, and D3 is the diameter of the pipeline of the air conditioning system.

2. The first valve core assembly includes a first valve seat, the first valve core is movably disposed within the first valve seat, and the first valve port is drilled in the first valve seat; 2. The two-way throttle valve according to claim 1, wherein a flow area of ​​a gap between a side wall of the first valve core and an inner wall of the first valve seat is larger than a flow area of ​​the first valve port.

3. The second valve core assembly includes a second valve seat, the second valve core is movably disposed within the second valve seat, and the second valve port is drilled in the second valve seat; 2. The two-way throttle valve according to claim 1, wherein a flow area of ​​a gap between the side wall of the second valve core and the inner wall of the second valve seat is smaller than a flow area of ​​the second valve port.

4. the first valve core assembly includes a first valve seat, and the first valve core is movably disposed within the first valve seat; 2. The two-way throttle valve according to claim 1, wherein a first sealing head is provided on one end of the first valve seat away from the second valve core assembly so as to cover the one end.

5. the second valve core assembly includes a second valve seat, and the second valve core is movably disposed within the second valve seat; 2. The bidirectional throttle valve according to claim 1, wherein a second sealing head and an elastic member are provided within the second valve seat, the second sealing head is provided at one end of the second valve seat away from the first valve core assembly, and both ends of the elastic member abut against the second valve core and the second sealing head, respectively.

6. 2. The two-way throttle valve according to claim 1, wherein the first passage is provided as a linear passage inclined with respect to the axial direction of the communication member.

7. 10. A first air conditioning system comprising: a compressor, a first heat exchanger, a second heat exchanger, a four-way valve, and at least two bidirectional throttle valves according to claim 1, wherein the bidirectional throttle valves include a first bidirectional throttle valve and a second bidirectional throttle valve, the first heat exchanger is connected between a C port of the four-way valve and an end of the first bidirectional throttle valve close to the second valve core assembly, the second heat exchanger is connected between an E port of the four-way valve and an end of the second bidirectional throttle valve close to the second valve core assembly, the end of the first bidirectional throttle valve close to the first valve core assembly and the end of the second bidirectional throttle valve close to the first valve core assembly are connected to each other, and the compressor is connected between a D port of the four-way valve and an S port of the four-way valve.

8. 8. The first air conditioning system according to claim 7, wherein there are at least two second heat exchangers and at least two second two-way throttle valves, each of the second heat exchangers is connected between an E port of the four-way valve and one end of each of the second two-way throttle valves that is close to the second valve core assembly, and one end of each of the second two-way throttle valves that is close to the first valve core assembly is connected to each other.

9. 7. A second air conditioning system comprising: a compressor, a first heat exchanger, a second heat exchanger, a four-way valve, and at least one bidirectional throttle valve according to any one of claims 1 to 6, wherein the first heat exchanger is connected between a C port of the four-way valve and an end of the bidirectional throttle valve that is close to the first valve core assembly, the second heat exchanger is connected between an E port of the four-way valve and an end of the bidirectional throttle valve that is close to the second valve core assembly, and the compressor is connected between a D port of the four-way valve and an S port of the four-way valve.

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