Throttling device and air conditioner

Abstract

The utility model discloses a throttling device and an air conditioner. Wherein the throttling device comprises two three-way pipes, a first valve group and a second valve group; the first valve group is connected with the first ends of the two three-way pipes and is used for unidirectionally communicating the two three-way pipes along a first direction; the second valve group is connected with the second ends of the two three-way pipes and is used for unidirectionally conducting the two three-way pipes along a second direction, and the second direction is opposite to the first direction; the second valve group is connected with the first valve group in parallel; and at least one of the first valve group and the second valve group is a throttle valve group. According to the technical scheme, different flow adjusting requirements in two directions can be met, meanwhile, the structural design can be simplified, and the manufacturing difficulty can be lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a throttling device and an air conditioner. Background Art

[0002] As people's living standards improve, cooling and heating type air conditioners are becoming more and more popular. Air conditioners mainly include a compressor, a condenser, a throttling device and an evaporator.

[0003] The throttling device in the related technology adopts a two-way throttling valve, but the existing two-way throttling valve usually connects two valve structures in series in a pipeline, which cannot meet the different flow regulation requirements in both directions. In addition, the method of connecting two valve structures in series in a pipeline requires a specially designed valve body structure, which makes the structure complex and difficult to manufacture. Utility Model Content

[0004] The main purpose of the utility model is to provide a throttling device, which is intended to meet different bidirectional flow regulation requirements, while simplifying the structural design and reducing the difficulty of manufacturing.

[0005] In order to achieve the above-mentioned purpose, the throttling device proposed by the utility model comprises:

[0006] Two tees;

[0007] a first valve group, connected to the first ends of the two three-way pipes, for unidirectionally conducting the two three-way pipes in a first direction; and

[0008] a second valve group, connected to the second ends of the two tees, for unidirectionally conducting the two tees in a second direction, the second direction being opposite to the first direction; the second valve group is connected in parallel with the first valve group;

[0009] Wherein, at least one of the first valve group and the second valve group is a throttle valve group.

[0010] In one embodiment of the present application, the first valve group is a one-way valve group, and the second valve group is a throttle valve group.

[0011] In one embodiment of the present application, the first valve group includes:

[0012] A first connecting pipe, connecting the first ends of the two tee pipes; and

[0013] The one-way valve body is arranged in the first connecting pipe and divides the first connecting pipe into a first cavity and a second cavity; the one-way valve body is used for one-way conduction from the first cavity to the second cavity.

[0014] In one embodiment of the present application, the one-way valve body comprises:

[0015] a first valve seat, fixedly disposed in the first connecting pipe, the first valve seat comprising a first valve section and a second valve section connected to each other, the first valve section being provided with a first valve port communicating with the first cavity, the second valve section being provided with a first flow port communicating with the second cavity; and

[0016] The first valve core is movably disposed in the second valve section and is used for blocking or opening the first valve port.

[0017] In one embodiment of the present application, the outer wall of the first valve section is sealedly connected to the inner wall of the first connecting pipe to divide the inner cavity of the first connecting pipe into the first cavity and the second cavity; the second valve section is arranged in the second cavity and is provided with a gap with the inner wall of the first connecting pipe, and the first flow port is arranged on the side wall of the second valve section;

[0018] One end of the second valve section facing away from the first valve section is open.

[0019] In one embodiment of the present application, the first flow port is arranged close to the first valve port.

[0020] In one embodiment of the present application, the second valve group includes:

[0021] A second connecting pipe, connecting the second ends of the two tee pipes; and

[0022] The throttle valve body is arranged in the second connecting pipe and divides the second connecting pipe into a third cavity and a fourth cavity; the throttle valve body is used for unidirectional conduction from the fourth cavity to the third cavity and can adjust the fluid flow from the fourth cavity to the third cavity.

[0023] In one embodiment of the present application, the throttle valve body includes:

[0024] a second valve seat, fixedly disposed in the second connecting pipe, the second valve seat comprising a third valve section and a fourth valve section connected to each other, the third valve section being provided with a second flow port communicating with the third cavity, and the fourth valve section being provided with a second valve port communicating with the fourth cavity;

[0025] a second valve core, movably disposed in the third valve section, for adjusting the opening of the second valve port; and

[0026] An elastic member is disposed in the third valve section and is used for applying pressure to the second valve core toward the second valve port.

[0027] In one embodiment of the present application, the outer wall of the fourth valve section is sealed and connected to the inner wall of the second connecting pipe to separate the inner cavity of the second connecting pipe into the third cavity and the fourth cavity; the third valve section is arranged in the third cavity and has a gap with the inner wall of the second connecting pipe, and the second flow port is arranged on the side wall of the third valve section.

[0028] In one embodiment of the present application, the throttle valve body further comprises a mounting plate movably disposed in the third valve section, and the elastic member is connected between the mounting plate and the second valve core;

[0029] An opening is provided at one end of the third valve section away from the fourth valve section.

[0030] In one embodiment of the present application, the second flow port is arranged close to the second valve port.

[0031] In one embodiment of the present application, filter nets are provided at both ends of the first valve group; and / or, filter nets are provided at both ends of the second valve group.

[0032] In one embodiment of the present application, the first valve group is welded and fixed to the first ends of the two tee pipes;

[0033] And / or, the second valve group is welded and fixed to the second ends of the two three-way pipes.

[0034] To achieve the above-mentioned purpose, the present application also provides an air conditioner, comprising a refrigerant pipe and the above-mentioned throttling device, wherein the throttling device is installed on the refrigerant pipe.

[0035] In the throttling device of the technical solution of the utility model, the first valve group and the second valve group are connected in parallel by using two three-way pipes, and the first valve group unidirectionally conducts the two three-way pipes in a first direction, and the second valve group unidirectionally conducts the two three-way pipes in a second direction opposite to the first direction, so that the directions of the fluids flowing through the first valve group and the second valve group are opposite, and at the same time, the first valve group and the second valve group can work independently, and at least one of the first valve group and the second valve group is a throttling valve group, which can play a throttling role on the fluid flow, so that the function of meeting different regulation requirements of two-way flow can be achieved. In addition, this embodiment realizes parallel connection by directly connecting the first valve group and the second valve group with the two three-way pipes, without the need to specially design the valve body structure, simplifying the structural design and reducing the manufacturing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0037] Figure 1 This is a structural schematic diagram of an embodiment of the throttling device of the utility model;

[0038] Figure 2 It is a structural schematic diagram of the fluid in the throttling device of the utility model flowing along the first direction;

[0039] Figure 3 It is a structural schematic diagram of the fluid in the throttling device of the utility model when it flows along the second direction.

[0040] Description of Figure Numbers:

[0041] Label name Label name 1 First three-way pipe 4 Second valve group 2 Second three-way pipe 41 Second connecting pipe 3 First valve group 41A The third cavity 31 First connecting pipe 41B The fourth cavity 31A First cavity 42 Throttle valve body 31B Second cavity 421 Second valve seat 32 Check valve body 4211 The third valve section 321 First valve seat 4212 Fourth valve section 3211 First valve section 421a Second valve port 3212 Second valve section 421b Second circulation port 321a First valve port 421c Opening 321b First circulation port 422 Second valve core 322 First valve core 423 Elastic parts 5 Filter 424 Mounting Plate

[0042] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0047] The utility model provides a throttling device, which is applied to an air conditioner and aims to connect two valve groups in parallel through two tee pipes to achieve two-way flow regulation requirements for refrigerant fluid, while simplifying the structural design and reducing the difficulty of manufacturing.

[0048] In the embodiment of the present utility model, Figures 1 to 3 As shown, the throttling device includes two tee pipes, a first valve group 3 and a second valve group 4.

[0049] The first valve group 3 connects the first ends of the two three-way pipes to unidirectionally conduct the two three-way pipes in a first direction; the second valve group 4 connects the second ends of the two three-way pipes and is connected in parallel with the first valve group 3; the second valve group 4 is used to unidirectionally conduct the two three-way pipes in a second direction, and the second direction is opposite to the first direction; wherein, at least one of the first valve group 3 and the second valve group 4 is a throttle valve group.

[0050] In this embodiment, taking the two tees as the first tees 1 and the second tees 2 as an example, the first valve group 3 is connected to the first end of the first tees 1 and the first end of the second tees 2, and the second valve group 4 is connected to the second end of the first tees 1 and the second end of the second tees 2. In this way, the first valve group 3 and the second valve group 4 can be directly connected in parallel by connecting the first tees 1 and the second tees 2. At the same time, by setting the unidirectional conduction directions of the first valve group 3 and the second valve group 4 to be opposite, and at least one of the first valve group 3 and the second valve group 4 is a throttle valve group, the function of bidirectional different flow rate regulation of the fluid between the first tees 1 and the second tees 2 can be achieved.

[0051] As an example, the fluid flows from the first three-way pipe 1 to the second three-way pipe 2 as the first direction, and the fluid flows from the second three-way pipe 2 to the first three-way pipe 1 as the second direction:

[0052] like Figure 2When the fluid flows in the first direction, the first valve group 3 is turned on and the second valve group 4 is closed. At this time, the fluid flows from the first three-way pipe 1 to the second three-way pipe 2 through the first valve group 3, realizing the flow of the fluid in the first direction. In this way, the flow regulation of the fluid can be achieved through the first valve group 3.

[0053] like Figure 3 When the fluid flows in the second direction, the first valve group 3 is closed and the second valve group 4 is turned on. At this time, the fluid flows from the second three-way pipe 2 to the first three-way pipe 1 through the second valve group 4, realizing the flow of the fluid in the second direction. In this way, the flow regulation of the fluid can be achieved through the second valve group 4.

[0054] It should be noted that when the throttling device is used in an air conditioner, the conduction direction of the first valve group 3 and the second valve group 4 is not limited to the working conditions in the air conditioner (such as cooling working conditions and heating working conditions, etc.), corresponding to, for example, in cooling working conditions, the fluid may flow in the first direction or the second direction; for example, in heating working conditions, the fluid may flow in the second direction or the first direction. The specific connection method can be determined according to the refrigerant flow direction and flow rate in the actual air conditioner refrigerant pipeline, and is not specifically limited here.

[0055] At least one of the first valve group 3 and the second valve group 4 is a throttle valve group. It can be understood that only the first valve group 3 can be a throttle valve group, or only the second valve group 4 can be a throttle valve group, or both the first valve group 3 and the second valve group 4 can be throttle valve groups. In actual application, the specific valve group types of the first valve group 3 and the second valve group 4 can be determined according to the actual fluid flow demand, so as to meet the requirements of different flow rates under different working conditions.

[0056] Optionally, the first valve group 3 can be connected to the first three-way pipe 1 and the second three-way pipe 2 by welding or threaded connection. Optionally, the second valve group 4 can be connected to the first three-way pipe 1 and the second three-way pipe 2 by welding or threaded connection. In this way, the assembly difficulty of the parallel structure of the first valve group 3 and the second valve group 4 can be simplified, and the assembly efficiency can be improved. At the same time, compared with installing two valve structures in the same pipeline, this embodiment can shorten the length dimension and is more suitable for occasions where the axial installation space of the pipeline is small.

[0057] Optionally, the three-way pipe may be a Y-shaped three-way pipe. The first end and the second end of the three-way pipe are respectively connected to the first valve group 3 and the second valve group 4, and the third end of the three-way pipe may be connected to the air conditioning refrigerant pipeline.

[0058] In summary, in the throttling device of the technical solution of the utility model, the first valve group 3 and the second valve group 4 are connected in parallel by using two three-way pipes, and the first valve group 3 unidirectionally conducts the two three-way pipes in a first direction, and the second valve group 4 unidirectionally conducts the two three-way pipes in a second direction opposite to the first direction, so that the directions of the fluids flowing through the first valve group 3 and the second valve group 4 are opposite, and at least one of the first valve group 3 and the second valve group 4 is a throttling valve group, and the throttling valve group can play a throttling role on the fluid flow, so that the function of meeting different bidirectional flow regulation requirements can be achieved. In addition, this embodiment realizes parallel connection by directly connecting the first valve group 3 and the second valve group 4 with the two three-way pipes, without the need to specially design the valve body structure, simplifying the structural design and reducing the manufacturing difficulty.

[0059] In one embodiment of the present application, the first valve group 3 is a one-way valve group, and the second valve group 4 is a throttle valve group.

[0060] In this embodiment, by setting the first valve group 3 as a one-way valve group and the second valve group 4 as a throttle valve group, the flow rate is fixed without throttling when the fluid flows in the first direction, and the fluid is throttled when it flows in the second direction. In this way, different flow regulation requirements of the fluid under different working conditions can be met.

[0061] It is understandable that the throttling requirements for the refrigerant in the air conditioning refrigeration condition and the heating condition are different. In some embodiments, throttling is required in the air conditioning refrigeration condition, and throttling is not required in the air conditioning heating condition. Then the first direction can be set as the refrigerant flow direction in the heating condition, and the second direction can be set as the refrigerant flow direction in the refrigeration condition. When in the heating condition, the refrigerant flows from the first three-way pipe 1 to the second three-way pipe 2. At this time, the first valve group 3 is turned on and the second valve group 4 is closed, and the throttling device does not throttle; when in the refrigeration condition, the refrigerant flows from the second three-way pipe 2 to the first three-way pipe 1. At this time, the first valve group 3 is closed, the second valve group 4 is turned on and throttling, and the throttling device realizes throttling. In this way, different throttling requirements for the refrigerant in the air conditioning refrigeration condition and the heating condition are realized.

[0062] In one embodiment of the present application, Figures 1 to 3 The first valve group 3 includes a first connecting pipe 31 and a one-way valve body 32. The first connecting pipe 31 connects the first ends of the two three-way pipes; the one-way valve body 32 is arranged in the first connecting pipe 31 and divides the first connecting pipe 31 into a first cavity 31A and a second cavity 31B; the one-way valve body 32 is used for one-way conduction from the first cavity 31A to the second cavity 31B.

[0063] In this embodiment, the two ends of the first connecting pipe 31 are respectively connected to the first end of the first three-way pipe 1 and the first end of the second three-way pipe 2, forming a flow channel connecting the two three-way pipes. Optionally, one end of the first connecting pipe 31 is welded or screwed to the first end of the first three-way pipe 1, and the other end of the first connecting pipe 31 is welded or screwed to the first end of the second three-way pipe 2. A one-way valve body 32 is arranged in the first connecting pipe 31, and the inner cavity of the first connecting pipe 31 is divided into a first cavity 31A and a second cavity 31B, wherein the first cavity 31A is connected to the first three-way pipe 1, and the second cavity 31B is connected to the second three-way pipe 2. The one-way valve body 32 can realize the function of one-way conduction from the first cavity 31A to the second cavity 31B under the pressure difference between the first cavity 31A and the second cavity 31B.

[0064] Optionally, the one-way valve body 32 may be a straight-through one-way valve or a right-angle one-way valve.

[0065] As an example, Figures 1 to 3 The one-way valve body 32 includes a first valve seat 321 and a first valve core 322. The first valve seat 321 is fixedly arranged in the first connecting pipe 31. The first valve seat 321 includes a first valve section 3211 and a second valve section 3212 connected to each other. The first valve section 3211 is provided with a first valve port 321a connected to the first cavity 31A, and the second valve section 3212 is provided with a first flow port 321b connected to the second cavity 31B; the first valve core 322 is movably arranged in the second valve section 3212, for blocking or opening the first valve port 321a.

[0066] This embodiment illustrates the structure of the one-way valve body 32, the first valve section 3211 and the second valve section 3212 are connected to the first cavity 31A and the second cavity 31B respectively, the first valve core 322 is movably arranged in the second valve section 3212, and the two ends of the first valve core 322 will be respectively affected by the fluid pressure in the first cavity 31A and the fluid pressure in the second cavity 31B.

[0067] like Figure 2 When the fluid flows from the first three-way pipe 1 to the second three-way pipe 2, the second valve seat 4 is closed, and the pressure in the first cavity 31A is greater than the pressure in the second cavity 31B. The fluid will push the first valve core 322 to move away from the first valve port 321a to open the first valve port 321a, so that the fluid in the first cavity 31A can flow into the second cavity 31B through the first valve port 321a and the first flow port 321b, that is, the fluid flows from the first three-way pipe 1 to the second three-way pipe 2 through the first valve group 3.

[0068] like Figure 3When the fluid flows from the second three-way pipe 2 to the first three-way pipe 1, the pressure in the first cavity 31A is lower than the pressure in the second cavity 31B, and the fluid pushes the first valve core 322 to move toward the first valve port 321a to block the first valve port 321a, and the second cavity 31B is not connected to the first cavity 31A.

[0069] In this way, the function of one-way conduction of the fluid from the first three-way pipe 1 to the second three-way pipe 2 without throttling is achieved.

[0070] Specifically, the outer wall of the first valve section 3211 is sealed and connected to the inner wall of the first connecting pipe 31 to separate the inner cavity of the first connecting pipe 31 into a first cavity 31A and a second cavity 31B; the second valve section 3212 is arranged in the second cavity 31B, and a first flow channel is formed with a gap between the inner wall of the first connecting pipe 31, and the first flow port 321b is arranged on the side wall of the second valve section 3212, and the first flow port 321b is connected to the second cavity 31B through the first flow channel.

[0071] Optionally, the outer wall of the first valve section 3211 is interference fit with the inner wall of the first connecting pipe 31 .

[0072] In one embodiment, the second valve section 3212 is open at one end away from the first valve section 3211. With this arrangement, when the fluid flows from the second three-way pipe 2 to the first three-way pipe 1, the fluid in the second cavity 31B can directly impact the first valve core 322 through the opening of the second valve section 3212 to move toward the first valve port 321a and block the first valve port 321a, thereby achieving a rapid flow stop effect.

[0073] Furthermore, the first flow port 321b can be arranged close to the first valve port 321a, so that the distance between the first flow port 321b and the first valve port 321a is closer, so that the first valve core 322 can connect the first valve port 321a and the first flow port 321b by moving a smaller distance, so that the conduction effect can be achieved even when the pressure difference on both sides of the first valve core 322 is small.

[0074] In one embodiment of the present application, Figures 1 to 3 The second valve group 4 includes a second connecting pipe 41 and a throttle valve body 42. The second connecting pipe 41 connects the second ends of the two three-way pipes; the throttle valve body 42 is arranged in the second connecting pipe 41, and divides the second connecting pipe 41 into a third cavity 41A and a fourth cavity 41B; the throttle valve body 42 is used for unidirectional conduction from the fourth cavity 41B to the third cavity 41A, and can adjust the fluid flow from the fourth cavity 41B to the third cavity 41A.

[0075] In this embodiment, the two ends of the second connecting pipe 41 are respectively connected to the second end of the first three-way pipe 1 and the second end of the second three-way pipe 2, forming another flow channel connecting the two three-way pipes. Optionally, one end of the second connecting pipe 41 is welded or screwed to the second end of the first three-way pipe 1, and the other end of the second connecting pipe 41 is welded or screwed to the second end of the second three-way pipe 2. A throttle valve body 42 is arranged in the second connecting pipe 41, and the inner cavity of the second connecting pipe 41 is divided into a fourth cavity 41B and a third cavity 41A, wherein the third cavity 41A is connected to the first three-way pipe 1, and the fourth cavity 41B is connected to the second three-way pipe 2. The throttle valve body 42 can realize the function of unidirectional conduction and throttling from the fourth cavity 41B to the third cavity 41A under the pressure difference between the fourth cavity 41B and the third cavity 41A.

[0076] As an example, Figures 1 to 3 The throttle valve body 42 includes a second valve seat 421, a second valve core 422 and an elastic member 423. The second valve seat 421 is fixedly arranged in the second connecting pipe 41. The second valve seat 421 includes a third valve section 4211 and a fourth valve section 4212 connected to each other. The third valve section 4211 is provided with a second flow port 421b communicating with the third cavity 41A, and the fourth valve section 4212 is provided with a second valve port 421a communicating with the fourth cavity 41B; the second valve core 422 is movably arranged in the third valve section 4211 for adjusting the opening of the second valve port 421a; the elastic member 423 is arranged in the third valve section 4211 for applying pressure to the second valve core toward the second valve port 421a.

[0077] This embodiment illustrates the structure of the throttle valve body 42, the third valve section 4211 and the fourth valve section 4212 are connected to the third cavity 41A and the fourth cavity 41B respectively, the second valve core 422 is movably arranged in the third valve section 4211, and an elastic member 423 is provided on the side of the second valve core 422 away from the second valve port 421a, then one end of the second valve core 422 will be subjected to the sum of the fluid pressure in the third cavity 41A and the pressure of the elastic member 423, and the other end of the second valve core 422 will be subjected to the fluid pressure in the fourth cavity 41B.

[0078] like Figure 3When the fluid flows from the second three-way pipe 2 to the first three-way pipe 1, the first valve seat 3 is closed, and the pressure in the fourth cavity 41B is greater than the sum of the fluid pressure and the elastic force in the third cavity 41A. The fluid will push the second valve core 422 to move in the direction away from the second valve port 421a to open the second valve port 421a, so that the fluid in the fourth cavity 41B can flow into the third cavity 41A through the second valve port 421a and the second flow port 421b. In this way, the size of the flow channel opening between the second valve port 421a and the second flow port 421b opened by the second valve core 422 is related to the fluid pressure difference at both ends of the second valve core 422 and the elastic force to be overcome. The throttling effect of the throttle valve body 42 can be adaptively adjusted according to the fluid pressure difference at both ends of the second valve core 422 and the pressure of the elastic member 423. It can be understood that the greater the pressure difference between the two sides of the second valve core 422, the greater the flow rate of the throttle valve body 42. In practical applications, the relationship between the throttling flow rate and the pressure difference at both ends of the second valve core 422 can be changed by adjusting the stiffness of the elastic member 423 , which can be specifically determined according to actual conditions.

[0079] like Figure 2 When the fluid flows from the first three-way pipe 1 to the second three-way pipe 2, the fluid pressure in the third cavity 41A is greater than the fluid pressure in the fourth cavity 41B, and the second valve core 422 is also subjected to the pressure of the elastic member 423, so that the fluid and the elastic member 423 push the second valve core 422 to move toward the second valve port 421a to block the second valve port 421a, and the fourth cavity 41B is not connected to the third cavity 41A.

[0080] In this way, the one-way throttling function of the fluid from the second three-way pipe 2 to the first three-way pipe 1 is achieved.

[0081] Specifically, the outer wall of the fourth valve section 4212 is sealed and connected to the inner wall of the second connecting pipe 41 to divide the inner cavity of the second connecting pipe 41 into a third cavity 41A and a fourth cavity 41B; the third valve section 4211 is arranged in the third cavity 41A, and a second flow channel is formed with a gap between the inner wall of the second connecting pipe 41, and the second flow port 421b is arranged on the side wall of the third valve section 4211, and the second flow port 421b is connected to the third cavity 41A through the second flow channel.

[0082] Optionally, an outer wall of the fourth valve section 4212 is interference fit with an inner wall of the second connecting pipe 41 .

[0083] In one embodiment, the second flow port 421b can be arranged close to the second valve port 421a, so that the distance between the second flow port 421b and the second valve port 421a is closer, so that when the pressure difference on both sides of the second valve core 422 is small, the second valve core 422 can be pushed to move to connect the second valve port 421a and the second flow port 421b.

[0084] In one embodiment, the throttle valve body 42 further includes a mounting plate 424 movably disposed in the third valve section 4211 , and the elastic member 423 is connected between the mounting plate 424 and the second valve core 422 ; an opening 421c is provided at one end of the third valve section 4211 away from the fourth valve section 4212 .

[0085] In this embodiment, a movable mounting plate 424 is provided in the third valve section 4211, one end of the elastic member 423 is connected to the mounting plate 424, and the other end is connected to the second valve core 422, and the third valve section 4211 is also provided with an opening 421c. Then, when the fluid flows from the first three-way pipe 1 to the second three-way pipe 2, the fluid in the third cavity 41A can directly impact the mounting plate 424 through the opening 421c, and drive the mounting plate 424 to move toward the second valve core 422 to compress the elastic member 423, so that the elastic member 423 can have a greater elastic force to act on the second valve core 422, so that the second valve core 422 has a greater sealing force to block the second valve port 421a, thereby ensuring a better flow-stopping effect.

[0086] Optionally, the elastic member 423 is a spring.

[0087] In one embodiment of the present application, Figure 1 , filter screens 5 are provided at both ends of the first valve group 3 .

[0088] By providing filter screens 5 at both ends of the first valve group 3, it is possible to prevent particulate impurities in the fluid from entering the first valve group 3 to cause jamming or wear problems. As an example, two filter screens 5 are fixedly installed on the inner wall of the first connecting pipe 31 and are respectively located on both sides of the one-way valve body 32.

[0089] In one embodiment of the present application, Figure 1 , filter screens 5 are provided at both ends of the second valve group 4.

[0090] By providing filter screens 5 at both ends of the second valve group 4, it is possible to prevent particulate impurities in the fluid from entering the second valve group 4 to cause jamming or wear problems. As an example, two filter screens 5 are fixedly mounted on the inner wall of the second connecting pipe 41 and are respectively located on both sides of the throttle valve body 42.

[0091] The utility model also provides an air conditioner, which includes a refrigerant pipeline and a throttling device. The specific structure of the throttling device refers to the above embodiment. Since the air conditioner adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the throttling device is installed in the refrigerant pipeline.

[0092] It can be understood that the air conditioner includes a compressor, a condenser, a throttling device and an evaporator. The throttling device of this embodiment can be connected between the condenser and the evaporator to meet different throttling requirements under different working conditions of the air conditioner.

[0093] Optionally, the third ends of the two tee pipes are respectively connected to the refrigerant pipeline.

[0094] Taking the heating condition as an example, the refrigerant flows from the first three-way pipe 1 to the second three-way pipe 2. At this time, the first valve seat 3 is turned on and the second valve seat 4 is closed. The flow regulation of the refrigerant can be achieved through the first valve seat 3. For example, when the first valve seat 3 is a throttle valve, the throttling device throttles one-way from the first three-way pipe 1 to the second three-way pipe 2; or, for example, when the first valve seat 3 is a one-way valve, the throttling device throttles one-way from the first three-way pipe 1 to the second three-way pipe 2 without throttling.

[0095] Taking the refrigeration condition as an example, the refrigerant flows from the second three-way pipe 2 to the first three-way pipe 1. At this time, the first valve seat 3 is closed and the second valve seat 4 is connected. The flow regulation of the refrigerant can be achieved through the second valve seat 4. For example, the second valve seat 4 is a throttle valve, and the throttling device performs one-way throttling from the second three-way pipe 2 to the first three-way pipe 1.

[0096] It should be noted that the connection method and flow regulation method of the throttling device are not limited to corresponding to the specific working conditions of the air conditioner. They can be specifically determined according to the refrigerant flow direction and flow rate in the actual air-conditioning refrigerant pipeline, and no limitation is made here.

[0097] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A throttling device, characterized in that: include: Two tees; A first valve group, connected to the first ends of the two three-way pipes, for unidirectionally conducting the two three-way pipes along a first direction; as well as a second valve group, connected to the second ends of the two tees, for unidirectionally conducting the two tees in a second direction, the second direction being opposite to the first direction; the second valve group is connected in parallel with the first valve group; Wherein, at least one of the first valve group and the second valve group is a throttle valve group.

2. The throttling device according to claim 1, characterized in that The first valve group is a one-way valve group, and the second valve group is a throttle valve group.

3. The throttling device according to claim 2, characterized in that The first valve group comprises: A first connecting pipe, connecting the first ends of the two tee pipes; and The one-way valve body is arranged in the first connecting pipe and divides the first connecting pipe into a first cavity and a second cavity; the one-way valve body is used for one-way conduction from the first cavity to the second cavity.

4. The throttling device according to claim 3, characterized in that The one-way valve body comprises: a first valve seat, fixedly disposed in the first connecting pipe, the first valve seat comprising a first valve section and a second valve section connected to each other, the first valve section being provided with a first valve port communicating with the first cavity, the second valve section being provided with a first flow port communicating with the second cavity; and The first valve core is movably disposed in the second valve section and is used for blocking or opening the first valve port.

5. The throttling device according to claim 4, characterized in that The outer wall of the first valve section is sealedly connected to the inner wall of the first connecting pipe to divide the inner cavity of the first connecting pipe into the first cavity and the second cavity; the second valve section is arranged in the second cavity and is provided with a gap between the second valve section and the inner wall of the first connecting pipe, and the first flow port is arranged on the side wall of the second valve section; One end of the second valve section facing away from the first valve section is open.

6. The throttling device according to claim 5, characterized in that The first flow port is arranged close to the first valve port.

7. The throttling device according to claim 2, characterized in that: The second valve group comprises: A second connecting pipe, connecting the second ends of the two tee pipes; and The throttle valve body is arranged in the second connecting pipe and divides the second connecting pipe into a third cavity and a fourth cavity; the throttle valve body is used for unidirectional conduction from the fourth cavity to the third cavity and can adjust the fluid flow from the fourth cavity to the third cavity.

8. The throttling device according to claim 7, characterized in that: The throttle valve body comprises: a second valve seat, fixedly disposed in the second connecting pipe, the second valve seat comprising a third valve section and a fourth valve section connected to each other, the third valve section being provided with a second flow port communicating with the third cavity, and the fourth valve section being provided with a second valve port communicating with the fourth cavity; a second valve core, movably disposed in the third valve section, for adjusting the opening of the second valve port; and An elastic member is disposed in the third valve section and is used for applying pressure to the second valve core toward the second valve port.

9. The throttling device according to claim 8, characterized in that The outer wall of the fourth valve section is sealed and connected to the inner wall of the second connecting pipe to separate the inner cavity of the second connecting pipe into the third cavity and the fourth cavity; the third valve section is arranged in the third cavity and has a gap with the inner wall of the second connecting pipe, and the second flow port is arranged on the side wall of the third valve section.

10. The throttling device according to claim 9, characterized in that The throttle valve body further comprises a mounting plate movably arranged in the third valve section, and the elastic member is connected between the mounting plate and the second valve core; An opening is provided at one end of the third valve section away from the fourth valve section.

11. The throttling device according to claim 9, characterized in that The second flow port is disposed close to the second valve port.

12. The throttling device according to any one of claims 1 to 9, characterized in that Filters are provided at both ends of the first valve group; and / or, filters are provided at both ends of the second valve group.

13. The throttling device according to any one of claims 1 to 9, characterized in that The first valve group is welded and fixed to the first ends of the two tee pipes; And / or, the second valve group is welded and fixed to the second ends of the two three-way pipes.

14. An air conditioner, characterized in that: It comprises a refrigerant pipe and a throttling device as described in any one of claims 1 to 13, wherein the throttling device is installed on the refrigerant pipe.

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