Refrigerant guide mechanism and indoor condenser

Abstract

The embodiment of the utility model provides a refrigerant guide mechanism and an indoor condenser, and relates to the technical field of vehicle-mounted air conditioners, and the refrigerant guide mechanism comprises a collecting pipe, an assembly pipe and a guide pipe. The assembling pipe is inserted into one end of the collecting pipe; the guide pipe comprises a first pipe section and a second pipe section which are connected, and a plurality of exhaust holes communicated with a pipe cavity of the first pipe section are formed in the pipe wall of the first pipe section. The pipe cavity of the second pipe section is gradually reduced in the direction from one end close to the first pipe section to the other end; the guide pipe is simultaneously arranged in the assembly pipe and the collecting pipe in a penetrating manner; the first pipe section is matched with the collecting pipe to define an exhaust cavity, and the exhaust holes communicate with the exhaust cavity; the end, with the smaller hole diameter, of the second pipe section extends into the collecting pipe. According to the design of the refrigerant guide mechanism, the temperature difference of the air outlet surface can be reduced by improving the flow distribution uniformity, and therefore the air outlet temperature uniformity is improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle air conditioning technology, specifically to a refrigerant guiding mechanism and an indoor condenser. Background Technology

[0002] The indoor condenser is a crucial component in heat pump air conditioning systems for new energy vehicles, especially during winter driving in pure electric vehicles. Since the onboard HVAC system lacks hot water as a heating source, using a PTC heater would consume a significant amount of electricity. Using the indoor condenser in the heat pump system as the heat source reduces electricity consumption and increases driving range. The basic working principle of the indoor condenser is as follows: the inlet connects to the compressor exhaust port of the air conditioning heat pump system. The inlet refrigerant is a high-temperature, high-pressure superheated gas. After entering the indoor condenser, heat is transferred through flat tubes to the outer wall of the tubes and the fins, where it exchanges heat with the air entering the fins. The heated air is then delivered to the vehicle interior to meet the heating needs. To ensure a relatively uniform temperature rise in different areas of the vehicle interior, the average temperature difference between the air outlet areas of the indoor condenser should be as small as possible. Therefore, depending on the temperature uniformity requirements of the air outlet surface under different operating conditions, a 4-flow or 2-flow indoor condenser is selected.

[0003] The inventors discovered in their research that existing indoor condensers have at least the following drawbacks:

[0004] In actual tests, some indoor condensers have poor flow distribution uniformity when the flow rate is low, which leads to a significant temperature difference between different areas of the air outlet surface.

[0005] The inventors discovered in their research that existing refrigerant guiding mechanisms have at least the following drawbacks: Utility Model Content

[0006] The purpose of this invention includes, for example, providing a refrigerant guiding mechanism and an indoor condenser that can reduce the temperature difference of the air outlet surface by improving the uniformity of airflow distribution, thereby improving the temperature uniformity of the air outlet.

[0007] The embodiments of this utility model can be implemented as follows:

[0008] In a first aspect, this utility model provides a refrigerant guiding mechanism, comprising:

[0009] The system comprises a manifold, an assembly pipe, and a guide pipe; the assembly pipe is inserted into one end of the manifold; the guide pipe includes a first pipe section and a second pipe section connected together, the first pipe section having multiple vent holes communicating with its cavity on its wall; the cavity of the second pipe section gradually decreases in size from one end near the first pipe section to the other end; the guide pipe passes through both the assembly pipe and the manifold; the first pipe section and the manifold cooperate to define an vent cavity, and the multiple vent holes communicate with the vent cavity; the smaller diameter end of the second pipe section extends into the manifold.

[0010] In an optional embodiment, the exhaust chamber is configured as an annular cavity surrounding the first pipe segment.

[0011] In an optional embodiment, at least two of the plurality of vent holes are spaced apart circumferentially in the first pipe section, or / and at least two of the plurality of vent holes are spaced apart axially in the first pipe section.

[0012] In an optional embodiment, the diameter of the outer wall of the second pipe segment gradually decreases in the direction from the end where the second pipe segment is connected to the first pipe segment to the other end of the second pipe segment; the second pipe segment and the manifold are spaced apart.

[0013] In an optional embodiment, the refrigerant guiding mechanism further includes a support plate with a positioning through hole; the support plate is fixed inside the manifold, and the second pipe section passes through the positioning through hole.

[0014] In an optional embodiment, a limiting protrusion is provided on the outer wall of the guide tube. The limiting protrusion is located on the first or second tube segment and abuts against the side of the support plate near the assembly tube to limit the insertion depth of the guide tube.

[0015] In an optional embodiment, the support plate is provided with an air supply hole that is independent of the positioning through hole, and the air supply hole is connected to the exhaust chamber.

[0016] In an optional embodiment, the assembly tube includes a plate, a first pipe connector, and a second pipe connector; the plate has a connecting through hole, the first pipe connector and the second pipe connector are both located on the plate and distributed on both sides of the plate, and the first pipe connector and the second pipe connector are both connected to the connecting through hole; the first pipe connector is inserted into the manifold, and the plate abuts against the port of the manifold; the guide tube passes through both the first pipe connector and the second pipe connector.

[0017] In an optional embodiment, the first pipe fitting is riveted to the manifold.

[0018] Secondly, this utility model provides an indoor condenser, the indoor condenser comprising:

[0019] The refrigerant guiding mechanism as described in any of the foregoing embodiments.

[0020] The beneficial effects of this utility model embodiment include, for example:

[0021] In summary, the refrigerant guiding mechanism provided in this embodiment, by adding a guide tube inside the manifold, can adjust the distribution of refrigerant entering the manifold, thereby improving the uniformity of refrigerant flow, heat exchange, and outlet air temperature. Specifically, the guide tube has a first pipe section and a second pipe section connected together, and the guide tube passes through both the assembly pipe and the manifold. The pipe wall of the first pipe section cooperates with the manifold to form an exhaust chamber, and the first pipe section is provided with multiple exhaust holes communicating with the exhaust chamber. Furthermore, the second pipe section is configured as a reducing pipe, with the smaller diameter port of the second pipe section being open and communicating with the manifold. The refrigerant enters the guide pipe from the inlet pipe that matches the manifold. Under the guidance of the first pipe section, some of the refrigerant directly enters the exhaust chamber from the exhaust hole and enters the flat pipe connected to the manifold. Some of the refrigerant can enter the second pipe section along the first pipe section and is accelerated by the action of the second pipe section, so that the refrigerant can quickly reach the area of ​​the manifold far away from the refrigerant inlet, making the refrigerant distribution more uniform, the heat exchange efficiency higher, the heat exchange effect better, and the temperature uniformity of the outlet air higher. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of an indoor condenser according to an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the support plate according to an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the guide tube according to an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the assembly tube according to an embodiment of this application.

[0027] icon:

[0028] 001-Inlet pipe; 100-Manifold pipe; 110-Support plate; 111-Positioning through hole; 112-Gas delivery hole; 200-Assembly pipe; 210-Plate body; 211-Connecting through hole; 220-First pipe joint; 230-Second pipe joint; 300-Guide pipe; 310-First pipe section; 311-Exhaust hole; 312-Exhaust chamber; 320-Second pipe section; 330-Limiting protrusion. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0034] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0035] Please refer to Figures 1-4This embodiment provides a refrigerant guiding mechanism, including a manifold 100, an assembly pipe 200, and a guide pipe 300. The assembly pipe 200 is inserted into one end of the manifold 100; the guide pipe 300 includes a first pipe section 310 and a second pipe section 320 connected together. The first pipe section 310 has a plurality of vent holes 311 communicating with its cavity on its pipe wall; the cavity of the second pipe section 320 gradually decreases in size from one end near the first pipe section 310 to the other end; the guide pipe 300 passes through both the assembly pipe 200 and the manifold 100; the first pipe section 310 cooperates with the manifold 100 to define an vent cavity 312, and the plurality of vent holes 311 communicate with the vent cavity 312; the smaller diameter end of the second pipe section 320 extends into the manifold 100.

[0036] As described above, the refrigerant guiding mechanism provided in this embodiment works as follows:

[0037] In use, the inlet pipe 001 is inserted into the assembly pipe 200, and the inlet pipe 001 is connected to the port of the first pipe section 310 of the guide pipe 300. The refrigerant enters the guide pipe 300 from the inlet pipe 001 and then enters the manifold 100. The guide pipe 300 has a connected first pipe section 310 and a second pipe section 320. The guide pipe 300 passes through both the assembly pipe 200 and the manifold 100. The pipe wall of the first pipe section 310 cooperates with the manifold 100 to form an exhaust chamber 312. The first pipe section 310 is provided with multiple exhaust holes 311 that communicate with the exhaust chamber 312. Furthermore, the second pipe section 320 is a reducing pipe, and the smaller diameter port of the second pipe section 320 is open and communicates with the manifold 100. The refrigerant enters the guide pipe 300 from the inlet pipe 001 that matches the manifold 100. Under the guidance of the first pipe section 310, some of the refrigerant directly enters the exhaust chamber 312 from the exhaust port 311 and enters the flat pipe connected to the manifold 100. Some of the refrigerant can enter the second pipe section 320 along the first pipe section 310. As the lumen of the second pipe section 320 gradually decreases, the refrigerant is accelerated when it flows through the second pipe section 320. The refrigerant can quickly reach the area of ​​the manifold 100 far from the refrigerant inlet, making the refrigerant distribution more uniform, the heat exchange efficiency higher, the heat exchange effect better, and the temperature uniformity of the outlet air higher.

[0038] The following embodiments illustrate the details of the refrigerant guiding mechanism of this application by way of example.

[0039] Please refer to Figure 1In this embodiment, optionally, the refrigerant guiding mechanism includes a manifold 100, an assembly pipe 200, and a guide pipe 300. The guide pipe 300 is installed inside the manifold 100 via the assembly pipe 200. Simultaneously, the assembly pipe 200 can also position the inlet pipe 001, the end of which is connected to the guide pipe 300. The refrigerant enters the guide pipe 300 from the inlet pipe 001 and then enters the manifold 100 from the guide pipe 300.

[0040] Due to the design of the guide tube 300, the refrigerant entering the manifold 100 from the inlet pipe 001 can be accelerated. After being accelerated by the guide tube 300, the refrigerant can move to a position in the manifold 100 that is far from the inlet pipe 001. The flow distribution of the refrigerant in the manifold 100 is uniform, and the temperature uniformity of the outlet air is high.

[0041] In this embodiment, optionally, the manifold 100 can be a round tube, a rectangular tube, or a "D"-shaped tube, etc., and the manifold 100 can be provided with flat holes for insertion and mating with flat tubes. The number of flat holes can be multiple, the same as the number of flat tubes, and the multiple flat holes can be evenly spaced along the axial direction of the manifold 100. The port of the manifold 100 can be sealed by a sealing plate.

[0042] Furthermore, the number of manifolds 100 can be set as needed, depending on the flow design of the indoor condenser. For example, when there is one flow, there can be two manifolds 100, which are distributed at both ends of the flat tube. When there are two or four flow processes, there can be four manifolds 100, with two manifolds 100 forming a group and distributed on the same side, and the two manifolds 100 in the same group arranged side by side.

[0043] Please refer to Figures 1-2 Optionally, a support plate 110 is installed inside the manifold 100. The support plate 110 has a positioning through hole 111 and an air inlet 112. Both the positioning through hole 111 and the air inlet 112 can be circular holes. The positioning through hole 111 is approximately located in the middle of the support plate 110. There can be multiple air inlets 112, which can be evenly spaced around the axis of the positioning through hole 111. The support plate 110 can be welded inside the manifold 100 and is coaxial with the manifold 100.

[0044] In this embodiment, optionally, the assembly tube 200 includes a plate 210, a first pipe connector 220, and a second pipe connector 230. The plate 210 has a connecting through hole 211. The first pipe connector 220 and the second pipe connector 230 are both located on the plate 210 and distributed on both sides of the plate 210, and both communicate with the connecting through hole 211. The first pipe connector 220 is inserted into the manifold 100, and the plate 210 abuts against the port of the manifold 100, thereby limiting the depth of insertion of the assembly tube 200 into the manifold 100 for ease of installation. A guide tube 300 passes through both the first pipe connector 220 and the second pipe connector 230.

[0045] It should be understood that the plate 210 can be a rectangular plate, and the plate 210, the first pipe joint 220, and the second pipe joint 230 can be set as an integral structure, which has high structural strength and is not easily deformed or damaged. It is also suitable for mass production and has low production costs. The connecting through hole 211 on the plate 210 can be set as a circular hole, and both the first pipe joint 220 and the second pipe joint 230 can be set as circular pipes. The first pipe joint 220, the connecting through hole 211, and the second pipe joint 230 are coaxially arranged.

[0046] Furthermore, in some embodiments, the number of first pipe connectors 220 and second pipe connectors 230 can also be multiple. For example, when there are four manifolds 100, with two manifolds 100 located side-by-side on the same side, the number of first pipe connectors 220 and second pipe connectors 230 can be two, and each first pipe connector 220 is connected to the second pipe connector 230 through a corresponding connecting through hole 211. The two first pipe connectors 220 are respectively inserted into the two manifolds 100, with one second pipe connector 230 corresponding to the inlet pipe 001 and the other second pipe connector 230 corresponding to the outlet pipe.

[0047] In this way, the structural shape of the assembly pipe 200 can be set as needed according to the distribution of the manifold 100, making the processing flexible and the application range wide.

[0048] Optionally, after the first pipe connector 220 is inserted into the manifold 100, the two can be fixedly connected by riveting. Obviously, in other embodiments, the first pipe connector 220 and the manifold 100 can also be fixedly connected by bonding, welding or interference fit.

[0049] Please refer to Figure 1 and Figure 4In this embodiment, optionally, the guide pipe 300 includes an integral first pipe section 310 and a second pipe section 320. The first pipe section 310 can be a cylindrical pipe, and its wall is provided with a plurality of vent holes 311 communicating with its cavity. Each vent hole 311 can be a circular hole, and the number of vent holes 311 is set as needed, and is not specifically limited in this embodiment. Furthermore, at least two of the plurality of vent holes 311 are arranged at intervals in the circumferential direction of the first pipe section 310, or / and at least two of the plurality of vent holes 311 are arranged at intervals in the axial direction of the first pipe section 310. The wide distribution range of the vent holes 311 enables better delivery of refrigerant. Meanwhile, the lumen of the second pipe section 320 gradually decreases in size from one end of the second pipe section 320 near the first pipe section 310 to the other end of the second pipe section 320, and the cross-sectional profile of the second pipe section 320 can be circular. Thus, the diameter of the outer circumference of the second pipe section 320 is also set to be gradually decreasing. When the guide pipe 300 is inserted into the manifold 100 using the second pipe section 320, the second pipe section 320 is less likely to interfere with other components, and the assembly is convenient.

[0050] Optionally, a limiting protrusion 330 is provided on the outer wall of the first pipe section 310 or the second pipe section 320. The limiting protrusion 330 is used to contact the support plate 110 to limit the insertion depth of the guide pipe 300 and reduce the assembly difficulty of the guide pipe 300 and the manifold 100. It should be understood that the limiting protrusion 330 can be configured as an annular structure around the first pipe section 310 or the second pipe section 320. The limiting protrusion 330 has a large contact area with the support plate 110, is not easy to slip off, and has a good limiting effect.

[0051] In this embodiment, the refrigerant guiding mechanism is assembled in the following ways, for example:

[0052] First, the first pipe connector 220 of the assembly pipe 200 is inserted into one port of the manifold 100. The plate 210 of the assembly pipe 200 contacts the end face of the manifold 100, limiting the insertion depth of the assembly pipe 200. Then, with the end of the second pipe segment 320 furthest from the first pipe segment 310 as the front end, the guide pipe 300 is inserted into the second pipe connector 230. The guide pipe 300 passes through the second pipe connector 230 and the first pipe connector 220 before extending into the manifold 100. The second pipe segment 320 passes through the positioning through hole 111 of the support plate 110 until the limiting protrusion 330 contacts the plate surface of the support plate 110. At this time, either the first pipe segment 310 or the second pipe segment 320 contacts the support plate 110, and there is an annular gap between the outer wall of the second pipe segment 320 and the inner wall of the manifold 100. Since the outer diameter of the first pipe section 310 is smaller than the inner diameter of the manifold 100, and the guide pipe 300, assembly pipe 200 and manifold 100 are coaxially arranged, the part of the first pipe section 310 extending out of the first pipe joint 220 cooperates with the inner wall of the manifold 100 to define an annular exhaust chamber 312, and all exhaust holes 311 are connected to the exhaust chamber 312.

[0053] During operation, refrigerant enters the guide pipe 300 from the inlet pipe 001. Part of the refrigerant enters the exhaust chamber 312 from the exhaust port 311, and then enters the flat pipe from the exhaust chamber 312. During this process, due to the annular gap between the second pipe section 320 and the manifold 100, when the refrigerant volume is large, some refrigerant can also directly enter the manifold 100 through the air outlet 112 on the support plate 110. Part of the refrigerant is accelerated after passing through the second pipe section 320 and then enters the manifold 100 from the port of the second pipe section 320. In this way, the refrigerant distribution is uniform, the heat exchange is uniform, and the outlet air temperature is uniform.

[0054] This embodiment also provides an indoor condenser, which includes an inlet pipe 001 and the refrigerant guiding mechanism mentioned in the above embodiment. The inlet pipe 001 is inserted into the assembly pipe 200 and connected to the first section 310 of the guide pipe 300. When the indoor condenser is running, the refrigerant is evenly distributed and the temperature uniformity of the outlet air is high.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A refrigerant guiding mechanism, characterized in that, include: The manifold (100), assembly pipe (200), and guide pipe (300) are provided. The assembly pipe (200) is inserted into one end of the manifold (100). The guide pipe (300) includes a first pipe section (310) and a second pipe section (320) connected together. The first pipe section (310) has a plurality of vent holes (311) on its wall that communicate with its cavity. The cavity of the second pipe section (320) gradually decreases in size from one end near the first pipe section (310) to the other end. The guide pipe (300) passes through both the assembly pipe (200) and the manifold (100). The first pipe section (310) and the manifold (100) cooperate to define an vent cavity (312), and the plurality of vent holes (311) communicate with the vent cavity (312). The end of the second pipe section (320) with the smaller diameter extends into the manifold (100).

2. The refrigerant guiding mechanism according to claim 1, characterized in that: The exhaust chamber (312) is configured as an annular cavity surrounding the first pipe segment (310).

3. The refrigerant guiding mechanism according to claim 1, characterized in that: At least two of the plurality of vent holes (311) are spaced apart in the circumferential direction of the first pipe section (310), or / and at least two of the plurality of vent holes are spaced apart in the axial direction of the first pipe section (310).

4. The refrigerant guiding mechanism according to claim 1, characterized in that: The diameter of the outer wall of the second pipe section (320) gradually decreases from the end where the second pipe section (320) is connected to the first pipe section (310) to the other end of the second pipe section (320); the second pipe section (320) has a gap with the manifold (100).

5. The refrigerant guiding mechanism according to claim 4, characterized in that: The refrigerant guiding mechanism also includes a support plate (110), on which a positioning through hole (111) is provided; the support plate (110) is fixed inside the manifold (100), and the second pipe section (320) passes through the positioning through hole (111).

6. The refrigerant guiding mechanism according to claim 5, characterized in that: The guide tube (300) has a limiting protrusion (330) on its outer wall. The limiting protrusion (330) is located on the first pipe section (310) or the second pipe section (320). The limiting protrusion (330) abuts against the side of the support plate (110) near the assembly tube (200) to limit the insertion depth of the guide tube (300).

7. The refrigerant guiding mechanism according to claim 5, characterized in that: The support plate (110) is provided with an air supply hole (112) that is independent of the positioning through hole (111), and the air supply hole (112) is connected to the exhaust chamber (312).

8. The refrigerant guiding mechanism according to claim 1, characterized in that: The assembly tube (200) includes a plate (210), a first pipe connector (220), and a second pipe connector (230); the plate (210) is provided with a connecting through hole (211), the first pipe connector (220) and the second pipe connector (230) are both provided on the plate (210) and distributed on both sides of the plate (210), and the first pipe connector (220) and the second pipe connector (230) are both connected to the connecting through hole (211); the first pipe connector (220) is inserted into the manifold (100), and the plate (210) abuts against the port of the manifold (100); the guide tube (300) passes through both the first pipe connector (220) and the second pipe connector (230).

9. The refrigerant guiding mechanism according to claim 8, characterized in that: The first pipe joint (220) is riveted to the manifold (100).

10. An indoor condenser, characterized in that, The indoor condenser includes: The refrigerant guiding mechanism according to any one of claims 1-9.

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