Bidirectional throttle valve and air conditioning system

Abstract

The utility model provides a two-way throttle valve and an air conditioning system, comprising a valve body provided with a first opening, a mounting cavity and a second opening which are communicated in sequence; the throttling assembly is arranged in the mounting cavity, the throttling assembly is provided with a first circulation channel and a throttling channel, and when fluid flows from the first opening to the second opening, the first circulation channel is closed, and the throttling channel is opened; when fluid flows from the second opening to the first opening, the first flowing channel is opened, and the throttling channel is closed; the two ends of the auxiliary pipe communicate with the first opening and the second opening correspondingly, and the auxiliary pipe is provided with a valve cavity; the one-way valve is arranged in the valve cavity and controls the flow direction of fluid in the auxiliary pipe, and when the fluid flows to the first opening from the second opening, the one-way valve is opened. By means of the scheme, the problems that in the prior art, a throttling channel in a two-way throttling valve cannot be made large, so that in the heating process, flow is insufficient, heat transfer is affected, and then the heating effect is affected can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and in particular, to a two-way throttle valve and an air conditioning system. Background Art

[0002] A two-way throttle valve is a valve that can automatically adjust the refrigerant flow according to the requirements of the refrigeration and heating modes. The two-way throttle valve allows the refrigerant to flow in two directions to meet different heat exchange requirements.

[0003] For the existing two-way throttle valve, to ensure the compactness of the internal structure of the two-way throttle valve, the throttle passage cannot be made large, resulting in insufficient flow during the heating process, affecting heat transfer, and further affecting the heating effect. Summary of the Utility Model

[0004] The utility model provides a two-way throttle valve and an air conditioning system to solve the problem that the throttle passage inside the existing two-way throttle valve cannot be made large, resulting in insufficient flow during the heating process, affecting heat transfer, and further affecting the heating effect.

[0005] According to one aspect of the utility model, a two-way throttle valve is provided, which includes: a valve body having a first opening, an installation cavity, and a second opening that are sequentially communicated; a throttle assembly disposed in the installation cavity, the throttle assembly having a first flow passage and a throttle passage, when the fluid flows from the first opening to the second opening, the first flow passage is closed and the throttle passage is opened; when the fluid flows from the second opening to the first opening, the first flow passage is opened and the throttle passage is closed; an auxiliary pipe, both ends of the auxiliary pipe are respectively communicated with the first opening and the second opening, the auxiliary pipe has a valve cavity; a check valve disposed in the valve cavity, the check valve controls the flow direction of the fluid in the auxiliary pipe, when the fluid flows from the second opening to the first opening, the check valve is opened.

[0006] Further, the check valve includes: a valve seat disposed in the valve cavity, the valve seat is provided with a valve port, the valve port penetrates the valve seat along the axial direction; a valve core movably disposed in the auxiliary pipe and located on the side of the valve seat close to the first opening, the valve core is used to control the flow rate of the valve port; an elastic part disposed in the auxiliary pipe, the elastic part is used to provide a force to the valve core toward away from the valve seat.

[0007] Further, the elastic part is configured such that when the valve core blocks the valve port, the elastic force of the elastic part on the valve core is less than a first preset value and greater than a second preset value; when the fluid flows from the first opening to the second opening, when the pressure difference between the first opening and the second opening is greater than the first preset value, the valve core overcomes the elastic force of the elastic part and blocks the valve port; when the pressure difference between the first opening and the second opening is less than the second preset value, the elastic part drives the valve core to open the valve port.

[0008] Further, a limiting structure is provided between the auxiliary pipe and the valve core to limit the distance that the valve core moves away from the valve seat.

[0009] Further, the limiting structure includes: a limiting protrusion provided inside the auxiliary pipe and located at the end of the valve core away from the valve seat, and the limiting protrusion is in limiting cooperation with the valve core.

[0010] Further, the auxiliary pipe contracts inward to form the limiting protrusion.

[0011] Further, a second flow passage is formed between the side wall of the valve core and the auxiliary pipe. When the valve core opens the valve port, the spaces at both ends of the valve core are communicated through the second flow passage.

[0012] Further, a flow groove is provided on the side wall of the valve core, and the second flow passage is formed between the flow groove and the side wall of the auxiliary pipe.

[0013] Further, the valve core includes a first section and a second section sequentially arranged along the axial direction. The first section is a conical section for blocking or opening the valve port, and the cross-sectional area of the second section is larger than that of the first section. The flow groove penetrates through the second section along the axial direction of the valve core.

[0014] Further, the first section includes a guiding section and a transition section that are connected in a stepped manner along the axial direction. The transition section is connected to the first section. The cross-sectional area of the guiding section is larger than that of the transition section, and the guiding section is in guiding cooperation with the auxiliary pipe.

[0015] Further, a stepped surface is formed between the guiding section and the transition section. The elastic part is sleeved on the transition section. One end of the elastic part abuts against the stepped surface, and the other end abuts against the valve seat.

[0016] Further, the two-way throttle valve further includes: a positioning structure provided between the auxiliary pipe and the valve seat, and the positioning structure is used to fix the position of the valve seat on the auxiliary pipe.

[0017] Further, the positioning structure includes: a positioning groove annularly arranged along the circumference of the valve seat on the side wall of the valve seat; a positioning protrusion formed by the inward contraction of the auxiliary pipe, and the positioning protrusion is in snap-fit with the positioning groove.

[0018] Further, the auxiliary pipe includes: a straight pipe section, and the one-way valve is arranged inside the straight pipe section; a first bent pipe section, which is separately provided from the straight pipe section. One end of the first bent pipe section is communicated with the first end of the straight pipe section, and the other end is communicated with the first opening; a second bent pipe section, which is separately provided from the straight pipe section. One end of the second bent pipe section is communicated with the second end of the straight pipe section, and the other end is communicated with the second opening.

[0019] According to another aspect of the present utility model, an air conditioning system is provided, which includes: a circulation pipeline, a compressor, an indoor heat exchanger and an outdoor heat exchanger provided on the circulation pipeline; the above-mentioned two-way throttle valve, the first opening of the two-way throttle valve is communicated with the opening at the end of the outdoor heat exchanger away from the compressor, and the second opening of the two-way throttle valve is communicated with the opening at the end of the indoor heat exchanger away from the compressor.

[0020] Further, the air conditioning system has: a refrigeration state. When the air conditioning system is in the refrigeration state, the refrigerant flows back into the compressor after passing through the compressor, the outdoor heat exchanger, the two-way throttle valve, and the indoor heat exchanger. Among them, the check valve of the two-way throttle valve is closed, and the refrigerant flows from the first opening of the two-way throttle valve and the throttling channel of the two-way throttle valve to the second opening of the two-way throttle valve. The pressure difference between the first opening and the second opening is greater than a first preset value; a heating state. When the air conditioning system is in the heating state, the refrigerant flows back into the compressor after passing through the compressor, the indoor heat exchanger, the two-way throttle valve, and the outdoor heat exchanger. Among them, the check valve is opened, and for the refrigerant flowing through the two-way throttle valve, part of the refrigerant flows from the second opening and the first flow channel to the first opening, and part of the refrigerant flows from the second opening and the check valve to the first opening; a defrosting state. When the air conditioning system is in the defrosting state, the refrigerant flows back into the compressor after passing through the compressor, the outdoor heat exchanger, the two-way throttle valve, and the indoor heat exchanger. Among them, the pressure difference between the second opening and the second opening otaku is less than a second preset value, the check valve is opened, and for the refrigerant flowing through the two-way throttle valve, part of the refrigerant flows from the first opening and the throttling channel to the second opening, and part of the refrigerant flows from the first opening and the check valve to the second opening.

[0021] Applying the technical solution of the present utility model, the two-way throttle valve is applied in the air conditioning system. When the air conditioning system is in the heating state, the refrigerant flows in the direction from the second opening to the first opening. During the heating process, the refrigerant has two flow paths. Part of the refrigerant flows through the first flow channel to the first opening, and the other part of the refrigerant flows through the auxiliary pipe to the first opening. Specifically, when in the heating state, the check valve is in an open state, and the refrigerant can flow through the auxiliary pipe to the first opening. In the prior art, in order to ensure the compactness of the internal structure of the valve body, the channel for the fluid to flow through the two-way throttle valve cannot be made large, resulting in a situation where the flow rate of the fluid may be insufficient after the refrigerant passes through the two-way throttle valve during the heating process, affecting the heating effect. Compared with the traditional technical solution, this solution can ensure that the check valve is in an open state in the heating state by setting an additional auxiliary pipe and a check valve, and part of the refrigerant flows through the auxiliary pipe to the first opening, improving the flow rate of the refrigerant at the first opening and the heat exchange effect. Description of the Drawings

[0022] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0023] Figure 1 Shows a schematic structural diagram of the two-way throttle valve provided by an embodiment of the present utility model when in the heating state;

[0024] Figure 2 Shows a schematic structural diagram of the cooperation between the auxiliary pipe and the one-way valve provided by an embodiment of the present utility model;

[0025] Figure 3 Shows a schematic structural diagram of the mechanism of the two-way throttle valve provided by an embodiment of the present utility model when in the cooling state;

[0026] Figure 4 Shows a schematic structural diagram of the two-way throttle valve provided by an embodiment of the present utility model when in the defrosting state;

[0027] Figure 5 Shows a schematic structural diagram of the cooperation between the straight pipe section and the one-way valve provided by an embodiment of the present utility model;

[0028] Figure 6 Shows a schematic structural diagram of the valve core provided by an embodiment of the present utility model.

[0029] Figure 7 Shows a schematic structural diagram of the air conditioning system provided by an embodiment of the present utility model when in the heating state;

[0030] Figure 8 Shows a schematic structural diagram of the air conditioning system provided by an embodiment of the present utility model when in the cooling state;

[0031] Figure 9 Shows a schematic structural diagram of the air conditioning system provided by an embodiment of the present utility model when in the defrosting state;

[0032] Figure 10 Shows a schematic structural diagram of the cooperation between the valve body and the throttling assembly when the flow passage is opened provided by an embodiment of the present utility model;

[0033] Figure 11 Shows a schematic structural diagram of the cooperation between the valve body and the throttling assembly when the throttling passage is opened provided by an embodiment of the present utility model.

[0034] Among them, the above-mentioned drawings include the following reference numerals:

[0035] 10. Valve body; 101. First opening; 102. Second opening; 1031. First chamber; 1032. Second chamber;

[0036] 20. Throttle component; 201. First flow passage; 202. Throttle passage;

[0037] 21. First spool valve assembly; 2101. First valve port; 211. First spool valve; 212. First valve seat;

[0038] 22. Second spool valve assembly; 2201. Second valve port; 221. Second spool valve; 222. Second valve seat; 223. Elastic member;

[0039] 23. Connecting seat; 231. First flow channel; 232. Second flow channel;

[0040] 30. Auxiliary pipe; 301. Limiting structure;

[0041] 31. Straight pipe section; 32. First bent pipe section; 33. Second bent pipe section;

[0042] 40. Check valve;

[0043] 41. Valve seat; 411. Valve port;

[0044] 42. Spool valve; 4201. Flow groove; 421. First section; 422. Second section; 4221. Guide section; 4222. Transition section;

[0045] 43. Elastic part;

[0046] 50. Positioning structure; 51. Positioning groove; 52. Positioning protrusion;

[0047] 01. Compressor; 02. Indoor heat exchanger; 03. Outdoor heat exchanger;

[0048] 011. First gap; 012. Second gap; 013. Third gap; 014. Fourth gap. Detailed implementation manners

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually illustrative only and in no way limits the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0050] As Figure 1 . Figure 10 And Figure 11As shown in the figure, an embodiment of the present utility model provides a two-way throttle valve, which includes a valve body 10, a throttle assembly 20, an auxiliary pipe 30 and a check valve 40. Among them, the valve body 10 has a first opening 101, an installation cavity and a second opening 102 that are connected in sequence. The throttle assembly 20 is arranged in the installation cavity. The throttle assembly 20 has a first flow channel 201 and a throttle channel 202. When the fluid flows from the first opening 101 to the second opening 102, the first flow channel 201 is closed and the throttle channel 202 is opened; when the fluid flows from the second opening 102 to the first opening 101, the first flow channel 201 is opened and the throttle channel 202 is closed. Both ends of the auxiliary pipe 30 are respectively connected to the first opening 101 and the second opening 102, and the auxiliary pipe 30 has a valve cavity; the check valve 40 is arranged in the valve cavity, and the check valve 40 controls the flow direction of the fluid in the auxiliary pipe 30. When the fluid flows from the second opening 102 to the first opening 101, the check valve 40 is opened. Among them, Figure 1 , Figure 9 and Figure 10 the arrow directions in are the flow directions of the refrigerant.

[0051] Applying the technical solution of the present utility model, the two-way throttle valve is applied in an air-conditioning system. When the air-conditioning system is in the heating state, the refrigerant flows from the second opening 102 to the first opening 101. During the heating process, the refrigerant has two flow paths. Part of the refrigerant flows through the first flow channel 201 to the first opening 101, and the other part of the refrigerant flows through the auxiliary pipe 30 to the first opening 101. Specifically, when in the heating state, the check valve 40 is in an open state, and the refrigerant can flow through the auxiliary pipe 30 to the first opening 101. In the prior art, to ensure the compactness of the internal structure of the valve body, the channels for the fluid to flow through the two-way throttle valve cannot be made large. As a result, during the heating process, after the refrigerant passes through the two-way throttle valve, there may be a situation of insufficient fluid flow, affecting the heating effect. Compared with the traditional technical solution, this solution can ensure that the check valve 40 is in an open state in the heating state by providing an additional auxiliary pipe 30 and a check valve 40. Part of the refrigerant flows through the auxiliary pipe 30 to the first opening 101, improving the flow rate of the refrigerant at the first opening 101 and enhancing the heat exchange effect.

[0052] It can be understood that in this solution, the flow area of the first flow channel 201 is larger than the flow area of the throttle channel 202. With such a setting, the fluid passing through the valve body 10 can achieve two-way flow and one-way throttling effect.

[0053] This solution does not limit the specific form of the throttle assembly 20.

[0054] For example Figure 10 and Figure 11As shown, in this embodiment, the throttling component 20 includes a first valve core component 21, a second valve core component 22, and a connection seat 23. The connection seat 23 is located between the first valve core component 21 and the second valve core component 22.

[0055] Among them, the connection seat 23 is arranged in the installation cavity, and the circumferential surface of the middle part of the connection seat 23 is hermetically connected to the inner side wall of the valve body 10. The connection seat 23 divides the installation cavity into independent first chamber 1031 and second chamber 1032. The first valve core component 21 is arranged in the first chamber 1031, and the second valve core component 22 is arranged in the second chamber 1032. The connection seat 23 is provided with independent first flow channel 231 and second flow channel 232, and the first flow channel 231 and the second flow channel 232 penetrate through the connection seat 23 respectively.

[0056] Among them, the first valve core component 21 includes a first valve core 211 and a first valve seat 212. The first valve seat 212 is provided with a first valve cavity and a first valve port 2101 that communicate with each other. The first valve port 2101 is arranged on the end surface of one end of the first valve core 211 close to the second valve core component 22, and one end of the first valve cavity far from the first valve port 2101 extends to the end surface of the end of the first valve core 211 far from the first valve port 2101; the first valve seat 212 is located in the first chamber 1031, and a first gap 011 is formed between the circumferential surface of the first valve seat 212 and the first chamber 1031; the first valve seat 212 is fixedly arranged on the connection seat 23, and the first valve port 2101 communicates with one end of the first flow channel 231, and the other end of the first flow channel 231 communicates with the second chamber 1032; the first valve core 211 is movably arranged in the first valve cavity and can open / close the first valve port 2101. A third gap 013 is formed between the first valve core 211 and the inner side wall of the first valve seat 212. When the first valve core 211 opens the first valve port 2101, the third gap 013 communicates with the first valve port 2101 and the first chamber 1031 respectively.

[0057] The second spool assembly 22 includes a second spool 221, a second valve seat 222, and an elastic member 223. The second valve seat 222 is provided with a second valve cavity and a second valve port 2201 that communicate with each other. The second valve port 2201 is disposed on the end face of the end of the second spool 221 close to the first spool assembly 21. One end of the second valve cavity away from the second valve port 2201 extends to the end face of the end of the second spool 221 away from the second valve port 2201. The second valve seat 222 is located in the second chamber 1032, and a second gap 012 is formed between the circumferential surface of the second valve seat 222 and the second chamber 1032. The second valve seat 222 is fixedly disposed on the connecting seat 23, and the second valve port 2201 communicates with one end of the second flow channel 232, and the other end of the second flow channel 232 communicates with the first chamber 1031. The second spool 221 is movably disposed in the second valve cavity and can open / close the second valve port 2201. The elastic member 223 is disposed in the second valve cavity, and the elastic member 223 is used to apply a force to the second spool 221 to block the second valve port 2201.

[0058] Specifically, the flow area of the second valve port 2201 is smaller than the flow area of the first valve port 2101. The first gap 011 communicates with the second flow channel 232. The second gap 012 communicates with the first flow channel 231.

[0059] Wherein, when the second spool 221 closes the second valve port 2201 and the first spool 211 opens the first valve port 2101, the fluid enters the second chamber 1032 from the second opening 102, and flows into the first opening 101 after passing through the second gap 012, the first flow channel 231, the first valve port 2101, the third gap 013, and the first chamber 1031. Among them, the second gap 012, the first flow channel 231, the first valve port 2101, the first spool 211, and the third gap 013 that are sequentially connected form a first flow channel 201.

[0060] When the first spool 211 closes the first valve port 2101 and the second spool opens the second valve port 2201, the fluid enters the first chamber 1031 from the first opening 101, and flows into the second opening 102 after passing through the first gap 011, the second flow channel 232, the second valve port 2201, the fourth gap 014, and the second chamber 1032. Among them, the first gap 011, the second flow channel 232, the second valve port 2201, and the fourth gap 014 that are sequentially connected form a throttling channel 202.

[0061] Such as Figure 1 and Figure 2As shown in the figure, in the embodiment of the present solution, the one-way valve 40 includes a valve seat 41, a valve core 42, and an elastic part 43. The valve seat 41 is arranged in the valve cavity. The valve seat 41 is provided with a valve port 411, and the valve port 411 penetrates through the valve seat 41 along the axial direction. The valve core 42 is movably arranged in the auxiliary pipe 30 and is located on the side of the valve seat 41 close to the first opening 101. The valve core 42 is used to control the flow rate of the valve port 411. The elastic part 43 is arranged in the auxiliary pipe 30, and the elastic part 43 is used to provide a force to the valve core 42 in the direction away from the valve seat 41. Specifically, in the heating state, when the fluid enters the auxiliary pipe 30 from the second opening 102, the fluid passes through the valve port 411. Under the action of the fluid and the elastic part 43, the valve core 42 opens the valve port 411, and the fluid flows to the first opening after passing through the valve port 411. With such a setting, its structure is simple, and by driving the movement of the valve core 42 through the fluid and the elastic part 43, the function of automatically adjusting the fluid flow direction is realized, without an additional control mechanism.

[0062] It should be noted that the valve core 42 controlling the flow rate of the valve port 411 includes the valve core 42 blocking or opening the valve port 411 and the valve core 42 adjusting the magnitude of the flow rate of the valve port 411.

[0063] As Figure 2 and Figure 3 shown, the elastic part 43 is configured such that when the valve core 42 blocks the valve port 411, the elastic force of the elastic part 43 on the valve core 42 is less than the first preset value and greater than the second preset value; when the fluid flows from the first opening 101 to the second opening 102, when the pressure difference between the first opening 101 and the second opening 102 is greater than the first preset value, the valve core 42 overcomes the elastic force of the elastic part 43 and blocks the valve port 411; when the pressure difference between the first opening 101 and the second opening 102 is less than the second preset value, the elastic part 43 drives the valve core 42 to open the valve port 411. With such a setting, in the refrigeration state, the refrigerant flows from the first opening 101 to the second opening 102. At this time, the pressure difference between the first opening 101 and the second opening 102 is greater than the first preset value, and this pressure difference can overcome the elastic force of the elastic part 43 on the valve core 42, so that the valve core 42 blocks the valve port 411, and the refrigerant only flows to the second opening 102 through the throttling channel 202 to ensure the refrigeration operation. The specific values of the first preset value and the second preset value in this solution are not limited. Figure 3 The arrow direction in the figure is the flow direction of the refrigerant.

[0064] In the refrigeration state, usually, the pressure difference between the first opening 101 and the second opening 102 is not less than 1 MPa. In the embodiment of the present solution, the first preset value is set to 0.9 MPa. Through the design of the elastic force of the elastic part 43, the valve core 42 closes the valve port 411 when the pressure difference between the first opening 101 and the second opening 102 is greater than 0.9 MPa.

[0065] AsFigure 4 As shown, further, when the fluid flows from the first opening 101 to the second opening 102, when the pressure difference between the first opening 101 and the second opening 102 is less than the second preset value, the elastic part 43 drives the valve core 42 to open the valve port 411, and the first preset value is greater than the second preset value.

[0066] As Figure 2 and Figure 4 shown, in the defrosting state, the flow direction of the refrigerant is the same as that in the refrigeration state. At this time, after the refrigerant passes through the throttling channel 202, the flow rate is small, which contradicts the high flow rate required during the defrosting process. When defrosting treatment is required, the pressure difference between the first opening 101 and the second opening 102 is less than the second preset value. At this time, this pressure difference cannot overcome the elastic force of the elastic part 43 on the valve core 42, causing the valve core 42 to open the valve port 411. Part of the refrigerant flows through the throttling channel 202 to the second opening 102, and part of the refrigerant flows through the auxiliary pipe 30 to the second opening 102. With this setting, it is possible to ensure the flow rate of the refrigerant at the second opening 102 during the defrosting process and ensure the defrosting effect. Figure 4 The arrow direction in

[0067] is the flow direction of the refrigerant. In the defrosting state, generally, the pressure difference between the first opening 101 and the second opening 102 is not higher than 0.7 MPa. In the embodiment of this solution, the second preset value is set to 0.7 MPa. Through the design of the elastic force of the elastic part 43, the valve core 42 opens the valve port 411 when the pressure difference between the first opening 101 and the second opening 102 is less than 0.7 MPa. At this time, part of the refrigerant flows through the auxiliary pipe 30 to the second opening 102, increasing the flow rate of the refrigerant during the defrosting process and improving the defrosting effect.

[0068] As Figure 2 and Figure 5 shown, further, a limiting structure 301 is provided between the auxiliary pipe 30 and the valve core 42 to limit the distance that the valve core 42 moves away from the valve seat 41. The limiting structure can prevent the valve core 42 from moving excessively due to excessive fluid pressure or other reasons, and can ensure that the valve core 42 does not exceed the predetermined range during movement, which helps to accurately control the opening and closing of the valve port 411 and improve the reliability of the one-way valve 40.

[0069] In the embodiment of this solution, the limiting structure 301 includes a limiting protrusion. The limiting protrusion is provided in the auxiliary pipe 30 and is located at the end of the valve core 42 away from the valve seat 41. The limiting protrusion is in limiting cooperation with the valve core 42. In the embodiment of this solution, the limiting protrusion is annularly arranged along the circumferential direction of the auxiliary pipe 30. With this setting, the contact area between the valve core 42 and the limiting protrusion can be increased, and the stability and reliability of the limitation can be improved.

[0070] This solution does not limit the forming form of the limit protrusion.

[0071] In the embodiment of this solution, the auxiliary pipe 30 contracts inward to form a limit protrusion. With this setting, its structure is simple and it is convenient to implement processing.

[0072] In the embodiment of this solution, a second flow passage is formed between the side wall of the valve core 42 and the auxiliary pipe 30. When the valve core 42 opens the valve port 411, the spaces at both ends of the valve core 42 are communicated through the second flow passage. With this setting, it can be ensured that when the valve port 411 is in the open state, the spaces at both ends of the valve core 42 are interconnected.

[0073] Such as Figure 2 and Figure 6 As shown, specifically, a flow groove 4201 is provided on the side wall of the valve core 42, and a second flow passage is formed between the flow groove 4201 and the side wall of the auxiliary pipe 30. With this setting, its structure is simple and it is convenient to implement processing.

[0074] This solution does not limit the number of the flow grooves 4201.

[0075] In the embodiment of this solution, four flow grooves 4201 are provided at intervals along the circumferential direction of the valve core 42. With this setting, the smoothness of the fluid flow process can be improved.

[0076] Such as Figure 6 As shown, specifically, the valve core 42 includes a first section 421 and a second section 422 arranged in sequence along the axial direction. The first section 421 is a conical section, and the first section 421 is used to block or open the valve port 411. The cross-sectional area of the second section 422 is larger than that of the first section 421, and the flow groove 4201 runs through the second section 422 along the axial direction of the valve core 42.

[0077] Furthermore, the first section 421 includes a guiding section 4221 and a transition section 4222 that are connected in a stepped manner along the axial direction. The transition section 4222 is connected to the first section 421. The cross-sectional area of the guiding section 4221 is larger than that of the transition section 4222, and the guiding section 4221 is in guiding cooperation with the auxiliary pipe 30. The setting of the guiding section 4221 can play a guiding role in the process of the valve core 42 moving and improve the stability of the valve core 42 during the moving process.

[0078] Specifically, a stepped surface is formed between the guiding section 4221 and the transition section 4222. The elastic part 43 is sleeved on the transition section 4222. One end of the elastic part 43 abuts against the stepped surface, and the other end abuts against the valve seat 41. With this setting, it can be ensured that the stepped surface and the valve seat 41 limit the position of the elastic part 43, and furthermore, a receiving space is formed among the stepped surface, the transition section 4222 and the auxiliary pipe. When the valve core 42 blocks the valve port 411, the elastic part 43 is located in the receiving space.

[0079] As Figure 5 shown, in an embodiment of the present solution, the two-way throttle valve further includes a positioning structure 50, and the positioning structure 50 is arranged between the auxiliary pipe 30 and the valve seat 41. The positioning structure 50 is used to fix the position of the valve seat 41 on the auxiliary pipe 30. With this setting, the assembly of the valve seat 41 and the auxiliary pipe 30 can be realized.

[0080] Specifically, the positioning structure 50 includes a positioning groove 51 and a positioning protrusion 52. Among them, the positioning groove 51 is annularly arranged along the circumferential direction on the side wall of the valve seat 41. The auxiliary pipe 30 is inwardly contracted to form the positioning protrusion 52, and the positioning protrusion 52 is engaged with the positioning groove 51. With this setting, its structure is simple and it is convenient to realize processing.

[0081] As Figure 1 and Figure 2 shown, in an embodiment of the present solution, the auxiliary pipe 30 includes a straight pipe section 31, a first bent pipe section 32 and a second bent pipe section 33. Among them, the one-way valve 40 is arranged in the straight pipe section 31. The first bent pipe section 32 is separately arranged from the straight pipe section 31. One end of the first bent pipe section 32 is communicated with the first end of the straight pipe section 31, and the other end is communicated with the first opening 101. The second bent pipe section 33 is separately arranged from the straight pipe section 31. One end of the second bent pipe section 33 is communicated with the second end of the straight pipe section 31, and the other end is communicated with the second opening 102. With this setting, it is convenient to realize the assembly of the one-way valve 40.

[0082] Specifically, a first annular protrusion is provided on the side wall of the valve body 10, and the first annular protrusion is communicated with the first opening 101. One end of the first bent pipe section 32 is inserted and welded with the first annular protrusion, and the other end of the first bent pipe section 32 is inserted and welded with the straight pipe section 31.

[0083] Furthermore, a second annular protrusion is also provided on the side wall of the valve body 10, and the second annular protrusion is communicated with the second opening 102. One end of the second bent pipe section 33 is inserted and welded with the second annular protrusion, and the other end of the second bent pipe section 33 is inserted and welded with the straight pipe section 31.

[0084] As Figure 1 , Figures 7 to 9 shown, an embodiment of the present solution further provides an air-conditioning system, which includes a circulation pipeline and a compressor 01, an indoor heat exchanger 02 and an outdoor heat exchanger 03 arranged on the circulation pipeline. The air-conditioning system further includes the two-way throttle valve implemented above. The first opening 101 of the two-way throttle valve is communicated with the opening at the end of the outdoor heat exchanger 03 far from the compressor 01, and the second opening 102 of the two-way throttle valve is communicated with the opening at the end of the indoor heat exchanger 02 far from the compressor 01. Among them, Figures 7 to 9 the arrow direction in is the refrigerant flow direction. This air-conditioning system has a refrigeration state, a heating state and a defrosting state.

[0085] In actual operation, under the refrigeration state, the pressure difference between the first opening 101 and the second opening 102 is relatively large and will be greater than the first preset value. Under the defrosting state, the pressure difference between the first opening 101 and the second opening 102 is relatively small and will be less than the second preset value.

[0086] Specifically, as Figure 7 shown, when the air-conditioning system is in the heating state, in the entire air-conditioning system, the refrigerant sequentially passes through the compressor 01, the indoor heat exchanger 02, the two-way throttle valve, and the outdoor heat exchanger 03, and then flows back to the compressor 01. The refrigerant flowing through the two-way throttle valve has two flow paths. Part of the refrigerant sequentially passes through the second opening 102 and the first flow channel 201 and then flows to the first opening 101, and the other part of the refrigerant flows to the first opening 101 through the auxiliary pipe 30.

[0087] As Figure 8 shown, when the air-conditioning system is in the refrigeration state, in the entire air-conditioning system, the refrigerant passes through the compressor 01, the outdoor heat exchanger 03, the two-way throttle valve, and the indoor heat exchanger 02, and then flows back to the compressor 01. The refrigerant flowing through the two-way throttle valve has one flow path. The refrigerant sequentially passes through the first opening 101 and the throttle channel 202 and then flows to the second opening 102.

[0088] As Figure 9 described, when the air-conditioning system is in the defrosting state, in the entire air-conditioning system, the refrigerant sequentially passes through the compressor 01, the outdoor heat exchanger 03, the two-way throttle valve, and the indoor heat exchanger 02, and then flows back to the compressor 01. The refrigerant flowing through the two-way throttle valve has two flow paths. Part of the refrigerant sequentially passes through the first opening 101 and the throttle channel 202 and then flows to the second opening 102; the other part of the refrigerant sequentially passes through the first opening 101 and the auxiliary pipe 30 and then flows to the second opening 102.

[0089] The air-conditioning system of this solution can, without affecting the normal operation of the refrigeration state, increase the flow rate of the refrigerant at the first opening 101 of the two-way throttle valve in the heating state, improve the heating effect, and in the defrosting state, increase the flow rate of the refrigerant at the first opening 101 of the two-way throttle valve, improving the defrosting effect.

[0090] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0091] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the description. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0092] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0093] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationships of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0094] In addition, it should be noted that the use of words such as "first", "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above words have no special meanings, and thus should not be construed as limiting the protection scope of the present utility model.

[0095] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A two-way throttle valve, characterized in that, Comprising: A valve body (10) having a first opening (101), an installation cavity, and a second opening (102) that are sequentially connected; A throttling component (20) disposed in the installation cavity. The throttling component (20) has a first flow passage (201) and a throttling passage (202). When fluid flows from the first opening (101) to the second opening (102), the first flow passage (201) is closed and the throttling passage (202) is opened; when fluid flows from the second opening (102) to the first opening (101), the first flow passage (201) is opened and the throttling passage (202) is closed; An auxiliary pipe (30) whose two ends are respectively connected to the first opening (101) and the second opening (102), and the auxiliary pipe (30) has a valve cavity; A one-way valve (40) disposed in the valve cavity. The one-way valve (40) controls the flow direction of the fluid in the auxiliary pipe (30). When fluid flows from the second opening (102) to the first opening (101), the one-way valve (40) is opened.

2. The bi-directional throttle valve according to claim 1, characterized in that, The one-way valve (40) includes: A valve seat (41) disposed in the valve cavity. The valve seat (41) is provided with a valve port (411), and the valve port (411) runs through the valve seat (41) along the axial direction; A valve core (42) movably disposed in the auxiliary pipe (30) and located on the side of the valve seat (41) close to the first opening (101). The valve core (42) is used to control the flow rate of the valve port (411); An elastic part (43) disposed in the auxiliary pipe (30). The elastic part (43) is used to provide a force to the valve core (42) in a direction away from the valve seat (41).

3. The two-way throttling valve according to claim 2, wherein The elastic part (43) is configured such that when the valve core (42) blocks the valve port (411), the elastic force of the elastic part (43) on the valve core (42) is less than a first preset value and greater than a second preset value; When fluid flows from the first opening (101) to the second opening (102), when the pressure difference between the first opening (101) and the second opening (102) is greater than the first preset value, the valve core (42) overcomes the elastic force of the elastic part (43) and blocks the valve port (411); when the pressure difference between the first opening (101) and the second opening (102) is less than the second preset value, the elastic part (43) drives the valve core (42) to open the valve port (411).

4. The bi-directional throttle valve according to claim 2, wherein, A limiting structure (301) is provided between the auxiliary pipe (30) and the valve core (42) to limit the distance that the valve core (42) moves away from the valve seat (41).

5. The bi-directional throttle valve according to claim 4, wherein, The limiting structure (301) includes: A limiting protrusion disposed in the auxiliary pipe (30) and located at the end of the valve core (42) away from the valve seat (41). The limiting protrusion is in limiting cooperation with the valve core (42).

6. The bi-directional throttle valve according to claim 5, wherein, The auxiliary pipe (30) contracts inward to form the limiting protrusion.

7. The bi-directional throttle valve according to claim 2, wherein A second flow passage is formed between the valve core (42) and the side wall of the auxiliary pipe (30). When the valve core (42) opens the valve port (411), the spaces at both ends of the valve core (42) are communicated through the second flow passage.

8. The bi-directional throttle valve according to claim 7, characterized in that, Flow grooves (4201) are arranged on the side wall of the valve core (42), and the second flow passage is formed between the flow grooves (4201) and the side wall of the auxiliary pipe (30).

9. The bi-directional throttle valve according to claim 8, wherein The valve core (42) includes a first section (421) and a second section (422) arranged in sequence along the axial direction. The first section (421) is a conical section, and the first section (421) is used to block or open the valve port (411). The cross-sectional area of the second section (422) is larger than that of the first section (421), and the flow grooves (4201) penetrate through the second section (422) along the axial direction of the valve core (42).

10. The bi-directional throttle valve according to claim 9, characterized in that, The second section (422) includes a guiding section (4221) and a transition section (4222) connected in a stepped manner along the axial direction. The transition section (4222) is connected to the first section (421). The cross-sectional area of the guiding section (4221) is larger than that of the transition section (4222), and the guiding section (4221) is in guiding cooperation with the auxiliary pipe (30).

11. The bi-directional throttle valve according to claim 10, characterized in that, A stepped surface is formed between the guiding section (4221) and the transition section (4222). The elastic part (43) is sleeved on the transition section (4222). One end of the elastic part (43) abuts against the stepped surface, and the other end abuts against the valve seat (41).

12. The bi-directional throttle valve according to claim 2, wherein, The two-way throttle valve further includes: A positioning structure (50) is arranged between the auxiliary pipe (30) and the valve seat (41), and the positioning structure (50) is used to fix the position of the valve seat (41) on the auxiliary pipe (30).

13. The bi-directional throttle valve according to claim 12, characterized in that, The positioning structure (50) includes: A positioning groove (51) is annularly arranged on the side wall of the valve seat (41) along the circumferential direction of the valve seat (41); A positioning protrusion (52), the auxiliary pipe (30) contracts inward to form the positioning protrusion (52), and the positioning protrusion (52) is in snap-fit with the positioning groove (51).

14. The bi-directional throttle valve according to claim 1, characterized in that, The auxiliary pipe (30) includes: A straight pipe section (31), and the one-way valve (40) is arranged in the straight pipe section (31); A first bent pipe section (32) is separately arranged from the straight pipe section (31). One end of the first bent pipe section (32) is communicated with the first end of the straight pipe section (31), and the other end is communicated with the first opening (101); A second bent pipe section (33) is separately arranged from the straight pipe section (31). One end of the second bent pipe section (33) is communicated with the second end of the straight pipe section (31), and the other end is communicated with the second opening (102).

15. An air conditioning system, characterized in that, It includes: A circulation pipeline and a compressor (01), an indoor heat exchanger (02) and an outdoor heat exchanger (03) arranged on the circulation pipeline; The two-way throttle valve according to any one of claims 1 to 14, wherein a first opening (101) of the two-way throttle valve is communicated with an opening at one end of the outdoor heat exchanger (03) away from the compressor (01), and a second opening (102) of the two-way throttle valve is communicated with an opening at one end of the indoor heat exchanger (02) away from the compressor (01).

16. The air conditioning system according to claim 15, characterized in that, The air conditioning system has: A refrigeration state. When the air conditioning system is in the refrigeration state, the refrigerant flows back into the compressor (01) after passing through the compressor (01), the outdoor heat exchanger (03), the two-way throttle valve, and the indoor heat exchanger (02). Wherein, the pressure difference between the first opening (101) and the second opening (102) is greater than a first preset value, the check valve (40) of the two-way throttle valve is closed, and the refrigerant flows from the first opening (101) of the two-way throttle valve and the throttling passage (202) of the two-way throttle valve to the second opening (102) of the two-way throttle valve; A heating state. When the air conditioning system is in the heating state, the refrigerant flows back into the compressor (01) after passing through the compressor (01), the indoor heat exchanger (02), the two-way throttle valve, and the outdoor heat exchanger (03). Wherein, the check valve (40) is opened, and for the refrigerant flowing through the two-way throttle valve, part of the refrigerant flows from the second opening (102) and the first flow passage (201) to the first opening (101), and part of the refrigerant flows from the second opening (102) and the check valve (40) to the first opening (101); A defrosting state. When the air conditioning system is in the defrosting state, the refrigerant flows back into the compressor (01) after passing through the compressor (01), the outdoor heat exchanger (03), the two-way throttle valve, and the indoor heat exchanger (02). Wherein, the pressure difference between the first opening (101) and the second opening (102) is less than a second preset value, the check valve (40) is opened, and for the refrigerant flowing through the two-way throttle valve, part of the refrigerant flows from the first opening (101) and the throttling passage (202) to the second opening (102), and part of the refrigerant flows from the first opening (101) and the check valve (40) to the second opening (102).

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