Pipeline joint and vehicle air conditioning system

Abstract

The invention discloses a pipeline joint and a vehicle air conditioning system. The pipeline joint comprises a seat body and two plugging heads, the seat body is provided with a leading-out flow channel and two leading-in flow channels, and the two leading-in flow channels are arranged at intervals and are respectively communicated with the leading-out flow channel; the two plugging heads are movably arranged on the two leading-in flow channels respectively, and each plugging head is provided with a plugging position for plugging the corresponding leading-in flow channel and a conducting position for conducting the corresponding leading-in flow channel in the moving stroke; each plugging head can be driven by fluid, is driven to a plugging position when the fluid flows from the leading-out flow channel to the leading-in flow channel, and is driven to a conducting position when the fluid flows from the leading-in flow channel to the leading-out flow channel. According to the scheme, three elements in the prior art are reduced into one element, the welding limitation with the periphery is greatly reduced, and the welding points of the pipeline are reduced by more than 50%, so that the related risk of welding failure is reduced, the requirement for the surrounding space is reduced, the design and arrangement of the pipeline are facilitated, and the assembly convenience is improved.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle air-conditioning systems, and in particular to a pipe joint and a vehicle air-conditioning system. Background Art

[0002] Currently, commercial vehicles with parking air conditioners commonly used all use two sets of air conditioner compressors, one for use when the engine is running and the other for use when the engine is stopped. The engine is running and the engine is stopped and the electric-driven air conditioner compressor is used. These two compressors are connected in parallel to the vehicle refrigeration system.

[0003] For example, patent CN113479036B discloses a dual-mode parking air conditioning system, which includes a mechanical compressor, an electric compressor and an evaporator. The mechanical compressor is driven by an engine, and the electric compressor is driven by a power supply. The mechanical compressor exhaust port of the mechanical compressor and the electric compressor exhaust port of the electric compressor are respectively connected to the two inlets of the high-pressure pipeline tee through corresponding one-way valves by high-pressure pipelines, and the outlet of the high-pressure pipeline tee is connected to the inlet of the condenser from the compressor to the condenser high-pressure pipeline, thereby realizing the alternating use of the mechanical compressor and the electric compressor.

[0004] However, the dual-mode parking air conditioning system in the prior art requires the use of a three-way pipe joint and two one-way valves, which are connected by welding, with a total of 7 full-welded joints. Each component and pipeline needs to reserve a space of 40 to 60 mm for the full-welded fixing point. When designing the pipeline, there will be too many restrictions, resulting in difficulties such as lengthening the pipeline, and lengthening the pipeline requires adding fixing points. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a pipe joint and a vehicle air-conditioning system to solve the technical problems in the prior art that a three-way pipe joint and two one-way valves are required, there are many installation restrictions and full welding nodes, and it is not convenient to assemble.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a pipe joint, comprising: A seat body having an outlet flow channel and two inlet flow channels, wherein the two inlet flow channels are arranged at intervals and are respectively connected to the outlet flow channels; and Two plugging heads are movably disposed at the two inlet flow channels, respectively. Each of the plugging heads has a blocking position for blocking the inlet flow channel in which it is located, and a conducting position for conducting the inlet flow channel in which it is located, during its movement stroke. Wherein, each of the blocking heads can be driven by fluid, and is driven to the blocking position when the fluid flows from the outlet channel to the inlet channel, and is driven to the conducting position when the fluid flows from the inlet channel to the outlet channel.

[0007] In some embodiments, the inlet flow channel includes a flow guide section and a mounting section connected to each other along a direction close to the outlet flow channel, and the aperture of the mounting section is larger than the aperture of the flow guide section; The plugging head can move in a direction approaching and away from the outlet flow channel, and its outer diameter is smaller than the aperture of the installation section and larger than the outer diameter of the guide section.

[0008] In some embodiments, the side of the plugging head close to the guide section is arranged in an arc-shaped convex surface and is surrounded by a sealing flange, and the sealing flange is pressed against the end of the guide section when the plugging head is in the plugging position.

[0009] In some embodiments, the plugging head is provided with a guide channel along a direction close to the outlet flow channel, and the guide channel is open at one end close to the outlet flow channel; The pipe joint also includes two guide arms, which are respectively installed on the two mounting sections and form a flow guide gap with the side walls of the mounting sections. The two guide arms extend in a direction close to the outlet flow channel and are respectively penetrated through the two guide channels.

[0010] In some embodiments, the pipe joint further comprises two mounting plates, the two mounting plates are respectively mounted on the two mounting sections, and a flow guide port is provided in a direction close to the outlet flow channel; The two guide arms are respectively mounted on the two mounting plates.

[0011] In some embodiments, a plurality of the guide openings are provided, and the plurality of the guide openings are spaced apart along the circumference of the guide arm.

[0012] In some embodiments, a side wall of the mounting section is provided with a pressing groove at one end close to the outlet flow channel, and the mounting plate is placed in the pressing groove; The seat body includes a base, a cover plate and a pressure plate. The base has two inlet flow channels and a connecting cavity connecting the two inlet flow channels. The connecting cavity is open on one side away from the inlet flow channel. The cover plate has the outlet flow channel and is covered on the opening side of the connecting cavity and is detachably connected to the base. The pressure plate is connected to the cover plate and is located on a side of the cover plate close to the connecting cavity and is pressed against the mounting plate.

[0013] In some embodiments, the cover plate is provided with a connection hole in a direction close to the base, and the base is provided with a matching hole corresponding to the connection hole; The seat body also includes a connecting bolt and a connecting nut. The connecting bolt passes through the connecting hole and the matching hole in sequence. The connecting nut is screwed on one end of the connecting bolt that extends out of the matching hole.

[0014] In some embodiments, the pipe connector also includes two elastic return parts, which are respectively installed on the two inlet channels, and each elastic return part connects the inner wall of the inlet channel and the plugging head, so as to reset the plugging head from the conducting position to the blocking position.

[0015] In a second aspect, the present invention further provides a vehicle air conditioning system, comprising a pipe joint as described in any one of the above items.

[0016] Compared with the prior art, when the pipe joint provided by the present invention is applied to the dual-mode parking air conditioning system, the outlet ends of the two compressors are connected to the two inlet flow channels of the seat body respectively, and the outlet flow channel of the seat body is connected to the inlet end of the condenser. When one of the compressors is started, the pressure of the pipeline increases, and the air conditioning refrigerant flows from the inlet flow channel in the loop to the outlet flow channel, which can push the plug in the inlet flow channel to move to the conducting position to conduct the inlet flow channel.

[0017] At this time, when the air-conditioning refrigerant flows from the outlet flow channel to another inlet flow channel, it will drive the blocking head in the other inlet flow channel to move to the blocking position, so that the other inlet flow channel is cut off and is stably in a sealed state under the pressure of the air-conditioning refrigerant to prevent backflow.

[0018] In this way, one component can be used to achieve unidirectional flow of air-conditioning refrigerant in two compressors, and the refrigerant flow direction of the two sets of compressors can be controlled separately, reducing the three components in the prior art to one component, greatly reducing the surrounding welding restrictions, reducing the pipeline welding points by more than 50%, thereby reducing the related risks of welding failure, and reducing the surrounding space requirements, facilitating pipeline design and layout, and improving assembly convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a pipe joint provided in an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the pipe joint in the pipeline being connected to the pipeline; Figure 3 yes Figure 1 A cross-sectional view of the middle pipe joint; Figure 4 yes Figure 1 Half-section view of the middle pipe joint; Figure 5 yes Figure 3 A cross-sectional view of the middle base; Figure 6 yes Figure 3 A cross-sectional view of the middle cover; Figure 7 It is a flow chart of a dual-mode parking air conditioning system in the prior art.

[0020] Description of reference numerals: 1. Seat body; 1a. Outlet flow channel; 1b. Inlet flow channel; 1c. Guide section; 1d. Mounting section; 1e. Pressing groove; 11. Base; 11a. Connecting cavity; 11b. Matching hole; 12. Cover plate; 12a. Connecting hole; 13. Pressing plate; 2. Sealing head; 21. Sealing flange; 2a. Guide channel; 3. Guide arm; 4. Mounting plate; 4a. Guide port; 5. Elastic reset member; 51. Compression spring; 6. Compressor; 7. Evaporator; 8. Condenser; 9. Three-way pipe joint; 10. One-way valve. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] In order to solve the technical problems in the prior art that a three-way pipe joint and two one-way valves are needed, there are many installation restrictions and full welding nodes, and it is not convenient to assemble, the present invention provides a pipe joint, which can realize the one-way flow of air-conditioning refrigerant in two compressors through one component, respectively control the refrigerant flow direction of the two sets of compressors, reduce the three components in the prior art to one component, greatly reduce the surrounding welding restrictions, reduce the pipeline welding points by more than 50%, thereby reducing the related risks of welding failure, and reduce the surrounding space requirements, facilitate pipeline design and layout, and improve assembly convenience.

[0023] It should be noted that the pipe connector described in the present invention is used for but not limited to vehicle air-conditioning systems, etc. For the convenience of explanation, in the present invention, only the application of the pipe connector to the vehicle air-conditioning system is taken as an example for explanation, and the principles of the application of the pipe connector to other types of equipment are essentially the same as those applied to the vehicle air-conditioning system, and are not described in detail here.

[0024] See also Figures 1 to 4 , Figures 1 to 4It is a structural schematic diagram of a pipe joint in an embodiment of the present invention, wherein the pipe joint includes a seat body 1 and two plugging heads 2; the seat body 1 has an outlet flow channel 1a and two inlet flow channels 1b, the two inlet flow channels 1b are arranged at intervals and are respectively connected to the outlet flow channel 1a; the two plugging heads 2 are respectively movably arranged in the two inlet flow channels 1b, and each plugging head 2 has a blocking position for blocking the inlet flow channel 1b in its movable stroke, and has a conducting position for conducting the inlet flow channel 1b in its movable stroke; wherein each plugging head 2 can be driven by a fluid, and is driven to the blocking position when the fluid flows from the outlet flow channel 1a to the inlet flow channel 1b, and is driven to the conducting position when the fluid flows from the inlet flow channel 1b to the outlet flow channel 1a.

[0025] When the pipe joint provided by the present invention is applied to a dual-mode parking air conditioning system, the outlet ends of the two compressors 6 are respectively connected to the two inlet flow channels 1b of the seat body 1, and the outlet flow channel 1a of the seat body 1 is connected to the inlet end of the condenser 8. When one of the compressors 6 is started, the pressure of the pipeline increases, and the air conditioning refrigerant flows from the inlet flow channel 1b in the loop to the outlet flow channel 1a, which can push the plugging head 2 in the inlet flow channel 1b to move to the conducting position to conduct the inlet flow channel 1b.

[0026] At this time, when the air-conditioning refrigerant flows from the outlet flow channel 1a to the other inlet flow channel 1b, it will drive the blocking head 2 in the other inlet flow channel 1b to move to the blocking position, so that the other inlet flow channel 1b is cut off and is stably in a sealed state under the pressure of the air-conditioning refrigerant to prevent backflow.

[0027] Thus, one component can be used to realize one-way flow of air-conditioning refrigerant in the two compressors 6, and the flow direction of refrigerant in the two sets of compressors 6 can be controlled separately, reducing the three components in the prior art to one component, greatly reducing the surrounding welding restrictions, reducing the pipeline welding points by more than 50%, thereby reducing the related risks of welding failure, and reducing the surrounding space requirements, facilitating pipeline design and layout, and improving assembly convenience.

[0028] It should be understood that, in this embodiment, the end of the inlet flow channel 1b away from the outlet flow channel 1a is open for connecting to the compressor 6 , and at the same time, the end of the outlet flow channel 1a away from the inlet flow channel 1b is open for connecting to the condenser 8 .

[0029] It should be noted that, in one embodiment, the plugging head 2 can be rotated to achieve the cutting off and opening of the inlet flow channel 1b; in another embodiment, the plugging head 2 can be expanded to achieve the cutting off and opening of the inlet flow channel 1b.

[0030] In one embodiment, the inlet flow channel 1b includes a connected guide section 1c and a mounting section 1d along a direction approaching the outlet flow channel 1a, and the aperture of the mounting section 1d is larger than the aperture of the guide section 1c; the plugging head 2 can move along a direction approaching and away from the outlet flow channel 1a, and its outer diameter is smaller than the aperture of the mounting section 1d and larger than the outer diameter of the guide section 1c.

[0031] In this embodiment, the outer diameter of the plugging head 2 is between the installation section 1d and the guide section 1c, so that when the fluid flows from the inlet flow channel 1b to the outlet flow channel 1a, the plugging head 2 can be pushed away from the guide section 1c to open the guide section 1c and make the inlet flow channel 1b conductive. When the fluid flows from the outlet flow channel 1a to the inlet flow channel 1b, the plugging head 2 can be pushed close to the guide section 1c, so that the guide section 1c is blocked to cut off the inlet flow channel 1b. The structure is simple and reliable, and the cost is saved.

[0032] In one embodiment, the side of the plugging head 2 close to the guide section 1c is arranged in an arc-shaped convex surface, and a sealing flange 21 is arranged around it. The sealing flange 21 is pressed against the end of the guide section 1c when the plugging head 2 is in the plugging position.

[0033] In this embodiment, the end of the plugging head 2 close to the guide section 1c is set as an arc-shaped convex surface to facilitate insertion into the guide section 1c, and cooperates with the sealing flange 21 to improve the sealing performance of the plugging head 2 to the guide section 1c. In addition, in one embodiment, a sealing ring is also set on one side of the sealing flange 21 close to the guide section 1c to further improve the sealing performance.

[0034] In one embodiment, see Figure 4 The plugging head 2 is provided with a guide channel 2a along a direction close to the outlet flow channel 1a, and the guide channel 2a is open at one end close to the outlet flow channel 1a; the pipe joint also includes two guide arms 3, the two guide arms 3 are respectively installed on the two mounting sections 1d, and a guide gap is formed with the side wall of the mounting section 1d, and extend along a direction close to the outlet flow channel 1a, and are respectively penetrated through the two guide channels 2a.

[0035] In this embodiment, a guide arm 3 is provided corresponding to the plugging head 2 to guide the plugging head 2 to move in a direction approaching and away from the guide flow channel, thereby playing a guiding role and ensuring that the plugging head 2 can stably seal the corresponding guide section 1c.

[0036] In one embodiment, the pipe joint further includes two mounting plates 4 , which are respectively mounted on the two mounting sections 1 d and have flow guide ports 4 a arranged in a direction close to the outlet flow channel 1 a ; and the two guide arms 3 are respectively mounted on the two mounting plates 4 .

[0037] In this embodiment, a guide port 4a is provided on the mounting plate 4 for fluid to pass through, and the guide arm 3 is installed in the middle of the mounting plate 4 to face the guide section 1c. Specifically, in this solution, a plurality of guide ports 4a are provided, and the plurality of guide ports 4a are arranged at intervals along the circumference of the guide arm 3. In this way, while improving the installation stability of the guide arm 3, the fluid can quickly pass through the introduction channel 1b.

[0038] In one embodiment, see Figure 5 and Figure 6 A side wall of the mounting section 1d is provided with a pressing groove 1e at one end close to the outlet flow channel 1a, and the mounting plate 4 is placed in the pressing groove 1e; the seat body 1 includes a base 11, a cover plate 12 and a pressing plate 13, the base 11 has two inlet flow channels 1b, and has a connecting cavity 11a connecting the two inlet flow channels 1b, the connecting cavity 11a is open on one side away from the inlet flow channel 1b, the cover plate 12 has the outlet flow channel 1a, and is covered on the open side of the connecting cavity 11a, and is detachably connected to the base 11, the pressing plate 13 is connected to the cover plate 12, and is located on the side of the cover plate 12 close to the connecting cavity, and is pressed against the mounting plate 4.

[0039] In this embodiment, the seat body 1 is configured in the form of a base 11, a cover plate 12 and a pressing plate 13, and the base 11 and the cover plate 12 are detachably connected, and the installation is pressed in the pressing groove 1e through the pressing plate 13, so that the various components of the joint can be relatively detached, which is convenient for cleaning and maintenance, improves practicality, and has a simple and reliable structure.

[0040] It should be noted that the base 11 and the cover 12 can be detachably connected by snap fastening or by threaded fitting.

[0041] In one embodiment, the cover plate 12 is provided with a connecting hole 12a along a direction close to the base 11, and the base 11 is provided with a matching hole 11b corresponding to the connecting hole 12a; the base body 1 also includes a connecting bolt and a connecting nut, the connecting bolt is passed through the connecting hole 12a and the matching hole 11b in sequence, and the connecting nut is screwed on one end of the connecting bolt extending out of the matching hole 11b.

[0042] In this embodiment, the cover plate 12 and the base 11 are detachably connected by the cooperation of the connecting bolts and the connecting nuts, and the structure is simple and reliable, and the operation is convenient. In order to improve the sealing performance, a sealing ring is provided between the cover plate 12 and the base 11, and the sealing ring is installed between the cover plate 12 and the base 11 to ensure that the refrigerant does not leak and ensure the sealing performance of the joint as a whole. In addition, the pressing plate 13 is connected to the cover plate 12 as a whole.

[0043] In one embodiment, the pipe joint also includes two elastic return members 5, which are respectively installed on the two inlet channels 1b. Each elastic return member 5 connects the inner wall of the inlet channel 1b and the plugging head 2, and is used to reset the plugging head 2 from the conducting position to the blocking position.

[0044] In this embodiment, when the fluid flows from the inlet channel 1b to the outlet channel 1a, and when pushing the plugging head 2 to switch to the conducting position, it needs to overcome the elastic force of the elastic return member 5; and when the fluid stops flowing, or flows from the outlet channel 1a to the inlet channel 1b, the plugging head 2 can automatically switch to the blocking position under the drive of the elastic return member 5 to prevent backflow.

[0045] It should be noted that, in this embodiment, the elastic return member 5 is a compression spring 51, which is installed on the guide arm 3, and one end of the compression spring 51 is connected to the guide arm 3 or the mounting plate 4, and the other end is connected to the plugging head 2 to drive the plugging head 2 to move in a direction away from the outlet flow channel 1a.

[0046] In addition, the present invention also provides a vehicle air conditioning system, which includes a pipe joint as described in any one of the above items. It should be noted that the detailed structure of the pipe joint of the vehicle air conditioning system can refer to the embodiment of the above pipe joint, which will not be repeated here; since the above pipe joint is used in the vehicle air conditioning system of the present invention, the embodiment of the vehicle air conditioning system of the present invention includes all technical solutions of all embodiments of the above pipe joint, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0047] In order to better understand the present invention, the following Figures 1 to 6 The technical solution of the present invention is described in detail: When the pipe joint provided by the present invention is applied to a dual-mode parking air conditioning system, the outlet ends of the two compressors 6 are respectively connected to the two inlet flow channels 1b of the seat body 1, and the outlet flow channel 1a of the seat body 1 is connected to the inlet end of the condenser 8.

[0048] When one of the compressors 6 is started, the pressure in the pipeline increases, and the air-conditioning refrigerant flows from the inlet flow channel 1b in the loop to the outlet flow channel 1a, which can push the plugging head 2 in the inlet flow channel 1b to move, and overcome the elastic force of the compression spring 51, so that the plugging head 2 moves to the conducting position to conduct the inlet flow channel 1b. At this time, when the air-conditioning refrigerant flows from the outlet flow channel 1a to the other inlet flow channel 1b, it will drive the plugging head 2 in the other inlet flow channel 1b to move to the blocking position, and the other compression spring 51 also applies elastic force to press the corresponding plugging head 2 against the blocking position, so that the other inlet flow channel 1b is cut off, and under the pressure of the air-conditioning refrigerant and the action of the compression spring 51, it is stably in a sealed state to prevent backflow.

[0049] Therefore, please refer to Figure 7 Compared with the dual-mode parking air conditioning system in the prior art, which requires a three-way pipe joint 9 and two one-way valves 10 and is connected by welding, with a total of 7 full-welded joints, this solution reduces 3 components to one component, greatly reduces the surrounding welding restrictions, facilitates pipeline design and layout, reduces surrounding space requirements, simplifies assembly structure, improves installation convenience, reduces installation restrictions, reduces welding points, and reduces the risk of welding point leakage.

[0050] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A pipe joint, characterized in that: include: The seat body has an outlet flow channel and two inlet flow channels, wherein the two inlet flow channels are arranged at intervals and are respectively connected to the outlet flow channels; and Two plugging heads are movably disposed at the two inlet flow channels, respectively. Each of the plugging heads has a blocking position for blocking the inlet flow channel in which it is located, and a conducting position for conducting the inlet flow channel in which it is located, during its movement stroke. Wherein, each of the blocking heads can be driven by fluid, and is driven to the blocking position when the fluid flows from the outlet channel to the inlet channel, and is driven to the conducting position when the fluid flows from the inlet channel to the outlet channel.

2. The pipe joint according to claim 1, characterized in that: The inlet flow channel includes a flow guide section and a mounting section connected to each other along a direction close to the outlet flow channel, and the aperture of the mounting section is larger than the aperture of the flow guide section; The plugging head can move in a direction approaching and away from the outlet flow channel, and its outer diameter is smaller than the aperture of the installation section and larger than the outer diameter of the guide section.

3. The pipe joint according to claim 2, characterized in that: The side of the plugging head close to the guide section is arranged in an arc-shaped convex surface and is surrounded by a sealing flange. The sealing flange is pressed against the end of the guide section when the plugging head is in the plugging position.

4. The pipe joint according to claim 2, characterized in that: The plugging head is provided with a guide channel along a direction close to the outlet flow channel, and the guide channel is open at one end close to the outlet flow channel; The pipe joint also includes two guide arms, which are respectively installed on the two mounting sections and form a flow guide gap with the side walls of the mounting sections. The two guide arms extend in a direction close to the outlet flow channel and are respectively penetrated through the two guide channels.

5. The pipe joint according to claim 4, characterized in that: The pipe joint further comprises two mounting plates, which are respectively mounted on the two mounting sections and are provided with flow guide ports in a direction close to the outlet flow channel; The two guide arms are respectively mounted on the two mounting plates.

6. The pipe joint according to claim 5, characterized in that: There are multiple guide ports, and the multiple guide ports are arranged at intervals along the circumference of the guide arm.

7. The pipe joint according to claim 5, characterized in that: A pressing groove is concavely formed on one end of the side wall of the installation section close to the outlet flow channel, and the installation plate is placed in the pressing groove; The seat body includes a base, a cover plate and a pressure plate. The base has two inlet flow channels and a connecting cavity connecting the two inlet flow channels. The connecting cavity is open on one side away from the inlet flow channel. The cover plate has the outlet flow channel and is covered on the opening side of the connecting cavity and is detachably connected to the base. The pressure plate is connected to the cover plate and is located on a side of the cover plate close to the connecting cavity and is pressed against the mounting plate.

8. The pipe joint according to claim 7, characterized in that: The cover plate is provided with a connection hole along a direction close to the base, and the base is provided with a matching hole corresponding to the connection hole; The seat body also includes a connecting bolt and a connecting nut. The connecting bolt passes through the connecting hole and the matching hole in sequence. The connecting nut is screwed on one end of the connecting bolt that extends out of the matching hole.

9. The pipe joint according to claim 1, characterized in that: The pipe joint also includes two elastic return parts, which are respectively installed on the two inlet channels. Each elastic return part connects the inner wall of the inlet channel and the plugging head, and is used to reset the plugging head from the conducting position to the blocking position.

10. A vehicle air conditioning system, characterized in that: Comprising a pipe joint as described in any one of claims 1 to 9.

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