Efficient heater with flow equalizing holes

Abstract

The efficient heater comprises a shell and a heating film, an inlet and an outlet are formed in the shell, a medium cavity is formed in the shell, a flow channel is formed in the bottom of the medium cavity, and an inlet water chamber and an outlet water chamber are arranged on the two sides, located below the medium cavity, in the shell respectively. The inlet water chamber and the outlet water chamber are respectively communicated with the inlet and the outlet, flow equalizing holes are formed in the top surfaces of the inlet water chamber and the outlet water chamber, the inlet water chamber and the outlet water chamber are respectively communicated with the medium cavity through the flow equalizing holes, the bottom surface of the medium cavity is an inclined surface, and one side, close to the inlet water chamber, of the bottom surface of the medium cavity is lower than one side, close to the outlet water chamber, of the bottom surface of the medium cavity. A very good flow equalizing effect on liquid in the medium cavity can be achieved through the flow equalizing holes, and the technical problems that an existing heater flow channel is low in heat exchange efficiency, poor in flow equalizing effect and prone to forming vortex points can be solved by combining the gradually-increased flow channel structure and the advantage that the heat exchange efficiency of the medium liquid is high.

Description

Technical Field

[0001] This invention relates to a high-efficiency heater with flow equalization orifices, belonging to the field of electric vehicle heater technology. Background Technology

[0002] In the electric vehicle field, heaters are typically used to heat the cabin and battery pack to improve user comfort and battery performance. These heaters are usually small, lightweight membrane heaters. Existing membrane heaters consist of a heating membrane and a housing with flow channels. The housing has an inlet and an outlet for the heating medium. The heating medium is introduced into the housing through the inlet, flows through the flow channels within the housing, exchanges heat with the heating membrane, and then exits through the outlet. This existing heater technology, with the heating medium directly introduced and discharged through the inlet and outlet, results in uneven distribution of the heating medium within the housing, poor flow uniformity, and a tendency to form eddy points, leading to insufficient heat exchange and low heat exchange efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a high-efficiency heater with flow equalization holes to improve the uniformity of the heating medium distribution within the shell and to improve heat exchange efficiency.

[0004] The present invention adopts the following technical solution: a high-efficiency heater with flow equalization holes, comprising a shell and a heating film, the shell having an inlet and an outlet, the shell having a medium cavity inside, the bottom of the medium cavity having a flow channel, the shell having an inlet water chamber and an outlet water chamber on the two sides below the medium cavity respectively, the inlet water chamber and the outlet water chamber being connected to the inlet and outlet respectively, the top surface of the inlet water chamber and the outlet water chamber having flow equalization holes, the inlet water chamber and the outlet water chamber being connected to the medium cavity through the flow equalization holes, the bottom surface of the medium cavity being an inclined surface, the side of the bottom surface of the medium cavity near the inlet water chamber being lower than the side near the outlet water chamber.

[0005] Both the inlet water chamber and the outlet water chamber have vent holes on their top surfaces.

[0006] The vent holes are located at the lowest point on the top surface of the inlet water chamber and the outlet water chamber.

[0007] Both the inlet and outlet water chambers are cylindrical in shape. The flow equalization holes are evenly distributed along the axis of the inlet and outlet water chambers. The vent holes are located at both ends of the top surface of the inlet and outlet water chambers.

[0008] The inlet water chamber and the outlet water chamber are symmetrically arranged on both sides of the shell, and the top surface of both the inlet water chamber and the outlet water chamber is a sloping surface that slopes downward from the inside of the shell to the outside.

[0009] The inclination angle of the bottom surface of the medium cavity is 1°-60°.

[0010] The flow channel on the bottom surface of the medium cavity is a baffle wall extending from the inlet water chamber to the outlet water chamber.

[0011] The retaining wall adopts a planar structure perpendicular to the bottom surface of the medium cavity, and the top of the retaining wall is serrated, straight, or arc-shaped.

[0012] The retaining wall adopts a structure of continuously arranged rectangular, circular, or polygonal columns.

[0013] The inlet water chamber and outlet water chamber are integrally cast with the shell; or the inlet water chamber and outlet water chamber are separately set from the shell, and the inlet water chamber and outlet water chamber are fixedly connected to the shell by bolts or welding.

[0014] The beneficial effects of this invention are as follows: The invention provides flow equalization holes on the top surfaces of the inlet and outlet water chambers. The flow equalization holes in the inlet water chamber can evenly distribute the liquid to the inlet of the flow channel, and simultaneously solve the problem of uneven flow velocity inside the flow channel caused by uneven pressure at the inlet. The flow equalization holes in the outlet water chamber ensure that the liquid at the outlet of the flow channel enters the outlet water chamber evenly, thereby achieving the best flow equalization effect. The heating medium liquid flows evenly out through the flow equalization holes to the inlet of the medium cavity. The liquid exchanges heat with the heating film on the outside of the shell. Under the action of the flow channel, the liquid forms turbulence and rapid flow within the medium cavity. Because the bottom surface of the medium cavity in this invention has a steep slope structure, as the liquid flows from the inlet side to the outlet side, the cross-section of the medium cavity gradually narrows, and the liquid velocity gradually increases, thus improving the heat exchange efficiency. This invention achieves excellent flow uniformity for the liquid inside the medium cavity through the flow uniform orifice. Combined with the advantages of the gradually increasing flow channel structure and the high heat exchange efficiency of the medium liquid, it can solve the technical problems of low heat exchange efficiency, poor flow uniformity, and easy formation of vortex points in existing heaters.

[0015] As a preferred solution, vents are provided on both sides of the top surface of the inlet and outlet water chambers to solve the problem of poor venting in the flow channel. The function of the vents is to quickly and completely discharge residual gas in the water chamber or air bubbles generated during the operation of the heater. The size, shape, and position of the vents are all adjustable. After the gas in the water chamber is completely discharged, the vents can also act as flow equalization holes, achieving flow equalization in the slower-flowing areas on both sides of the superimposed flow channel, thereby achieving a multi-directional and all-round flow equalization effect.

[0016] As a preferred option, the top surfaces of both the inlet and outlet water chambers are inclined downwards from the inside of the shell. This structure allows the water inlet and outlet to converge at the lowest point on both the inlet and outlet sides, which is more conducive to the uniform entry and exit of liquid.

[0017] As a preferred solution, the baffle wall guides and equalizes the flow of liquid within the medium cavity, making it easier for the liquid to form turbulent flow within the medium cavity, which is more conducive to heat transfer. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a high-efficiency heater with flow equalization holes according to an embodiment of the present invention (the heating film is omitted in the figure). Figure 2 yes Figure 1 A cross-sectional view; Figure 3 yes Figure 1 In another cross-sectional view; Figure 4 yes Figure 1 Cross-sectional view at the inlet water chamber; Figure 5 yes Figure 1 A three-dimensional view of a high-efficiency heater with flow equalization orifices; Figure 6 yes Figure 1 A perspective view of a high-efficiency heater with flow equalization orifices in another direction; In the diagram: 1. Inlet, 2. Outlet, 3. Flow equalization hole, 4. Vent hole, 5. Flow channel, 6. Shell, 7. Inlet water chamber, 8. Outlet water chamber. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1 to 5 As shown, an embodiment of the present invention discloses a high-efficiency heater with flow equalization holes, comprising a housing 6 and a heating film (not shown in the figures). The housing 6 has an inlet 1 and an outlet 2, and the housing 6 has a medium cavity inside. The heating film is disposed on the outside of the housing 6 and transfers heat to the liquid in the medium cavity. A flow channel 5 is provided at the bottom of the medium cavity. An inlet water chamber 7 and an outlet water chamber 8 are respectively provided on both sides below the medium cavity inside the housing 6, and the inlet water chamber 7 and the outlet water chamber 8 are respectively connected to the inlet 1 and the outlet water chamber 2. Flow equalization holes 3 are opened on the top surface of the inlet water chamber 7 and the outlet water chamber 8 are respectively connected to the medium cavity through the flow equalization holes 3. The bottom surface of the medium cavity is inclined, and the side of the bottom surface of the medium cavity near the inlet water chamber 7 is lower than the side near the outlet water chamber 8. The inclination angle of the bottom surface of the medium cavity is 1°-60°. Preferably, in this embodiment, the inclination angle of the bottom surface of the medium cavity is 1°.

[0021] Both the inlet water chamber 7 and the outlet water chamber 8 have vent holes 4 on their top surfaces. The vent holes 4 are located at the lowest points of the top surfaces of the inlet water chamber 7 and the outlet water chamber 8. The inlet water chamber 7 and the outlet water chamber 8 are symmetrically arranged on both sides of the shell 6, and the top surfaces of both the inlet water chamber 7 and the outlet water chamber 8 are inclined surfaces sloping downwards from the inside to the outside of the shell 6. Both the inlet water chamber 7 and the outlet water chamber 8 have cylindrical structures, and the flow equalization holes 3 are evenly distributed along the axis of the inlet water chamber 7 and the outlet water chamber 8. The vent holes 4 are located at both ends of the top surfaces of the inlet water chamber 7 and the outlet water chamber 8.

[0022] The flow channel 5 on the bottom surface of the medium cavity is a baffle extending from the inlet water chamber 7 to the outlet water chamber 8. In this embodiment, the baffle adopts a continuously arranged conical structure.

[0023] In this embodiment, the inlet water chamber 7 and the outlet water chamber 8 are integrally cast with the shell 6. In other embodiments, the inlet water chamber 7 and the outlet water chamber 8 can be separate structures from the shell 6, and are fixedly connected to the shell 6 by bolts or welding. That is to say, the inlet water chamber 7 and the outlet water chamber are not limited to fully enclosed or semi-enclosed states; moreover, the flow equalization holes 3 can be arbitrarily arranged, and their size and shape can be adjusted to ensure that the liquid flows evenly to the flow channel side, thereby ensuring the flow equalization effect.

[0024] In other embodiments, the retaining wall may also be a continuous arrangement of rectangular columns, cylindrical columns, polygonal columns, or conical structures; the retaining wall may also be a planar structure perpendicular to the bottom surface of the medium cavity, and the top of the retaining wall may be serrated, straight, or arc-shaped.

[0025] The heating medium liquid first enters the inlet water chamber through the inlet, then flows out evenly through the flow equalization orifice to the inlet of the medium cavity. The liquid exchanges heat with the heating film on the outside of the shell. Under the action of the flow channel, the liquid forms turbulent flow within the medium cavity, improving the heat transfer effect. The liquid at the end of the flow channel enters the outlet water chamber evenly through the flow equalization orifice, and then exits through the outlet. This invention provides flow equalization orifices in the inlet water chamber to ensure uniform distribution of the liquid entering the flow channel, and in the outlet water chamber to ensure uniform entry of the liquid from the flow channel outlet into the outlet water chamber, thereby achieving optimal flow equalization. Figure 4 It can be seen that after the liquid flows out of the flow equalization orifice, it flows evenly into the flow channel. Because the bottom surface of the medium cavity in this invention has a steep, sloping structure, [the flow is as follows]... Figures 2 to 3 It can be seen that as the liquid flows from the inlet side to the outlet side, the cross-section of the medium cavity gradually narrows, and the liquid velocity gradually increases, thus improving the heat exchange efficiency. Figures 2 to 3 The steep slope gradient shown is 1°, but the specific angle is not limited and can be 2°, 5°, 20°, 60°, etc., which can be adjusted according to the actual use environment of the product.

[0026] Flow equalization holes are distributed on the top surfaces of the inlet and outlet water chambers, ensuring even liquid distribution at the flow channel inlet. This also addresses issues such as uneven pressure at the inlet leading to uneven flow velocity within the flow channel. Additionally, vent holes are located on both sides of the top surfaces of the inlet and outlet water chambers to prevent poor venting. The vent holes effectively remove residual gas or air bubbles generated during heater operation. The size, shape, and position of the vent holes are adjustable. After the gas in the water chamber is completely removed, the vent holes can also function as flow equalization holes, achieving uniform flow in the slower-moving areas on both sides of the superimposed flow channel, thus achieving a multi-directional and all-around flow equalization effect. The flow equalization holes on the inlet and outlet sides can be arbitrarily arranged, and their size and shape can be adjusted to ensure even liquid entry into the outlet side water chamber, achieving optimal flow equalization. The shape and arrangement of the flow equalization holes are not limited to circular, oval, triangular, quadrilateral, pentagonal, hexagonal, or polygonal shapes, and their size and arrangement are unrestricted. The heater of the present invention can quickly disperse liquid, quickly separate and expel bubbles, and has the characteristics of high heat exchange efficiency, large heat dissipation area, high heat conversion rate and high safety performance.

[0027] The inlet and outlet are separate components, connected to the shell by welding. The inlet and outlet water chambers can be made into two independent structures. The top surface where the flow equalization hole is located can be made into a separate cover plate structure and assembled with the shell, or it can be integrally formed by casting or injection molding. The flow equalization hole can be directly cast or machined.

[0028] The flow channel on the bottom surface of the medium cavity and the shell can be integrally formed through processes such as casting or injection molding. The flow channel can also be made separately and assembled with the shell. All components in the heater can be made of aluminum alloy, and other metal materials can also be used, such as cast aluminum, cast iron, titanium alloy, aluminum profiles, iron, copper, titanium, stainless steel, etc.; the materials of the inlet, outlet and flow channel are not limited to metal, and can also be non-metallic materials such as plastic.

[0029] In summary, this invention fully utilizes the advantages of flexible size, shape, and layout of the flow equalization orifices to achieve excellent flow equalization for the liquid inside the medium cavity. Combined with the gradually increasing flow channel structure and the high heat exchange efficiency of the medium liquid, it solves the technical problems of existing heaters, such as low heat exchange efficiency, high cost, poor flow equalization, easy formation of vortex points, and insufficient product reliability. The heater flow channel structure of this invention has advantages such as high heat exchange efficiency, light weight, low cost, and simple assembly process.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. The present invention is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this invention should be considered within the scope of protection of this invention.

Claims

1. A high-efficiency heater with a flow equalization orifice, comprising a shell and a heating film, the shell having an inlet and an outlet, the shell having a medium cavity inside, and a flow channel at the bottom of the medium cavity, characterized in that: The housing has an inlet water chamber and an outlet water chamber located on both sides below the medium cavity. The inlet water chamber and the outlet water chamber are connected to the inlet and outlet, respectively. A flow equalization hole is opened on the top surface of the inlet water chamber and the outlet water chamber. The inlet water chamber and the outlet water chamber are connected to the medium cavity through the flow equalization hole. The bottom surface of the medium cavity is a slope, and the side of the bottom surface of the medium cavity near the inlet water chamber is lower than the side near the outlet water chamber.

2. The high-efficiency heater with flow equalization orifice according to claim 1, characterized in that: Both the inlet water chamber and the outlet water chamber have vent holes on their top surfaces.

3. The high-efficiency heater with flow equalization orifice according to claim 2, characterized in that: The vent holes are located at the lowest point on the top surface of the inlet water chamber and the outlet water chamber.

4. The high-efficiency heater with flow equalization orifice according to claim 2, characterized in that: Both the inlet and outlet water chambers are cylindrical in shape. The flow equalization holes are evenly distributed along the axis of the inlet and outlet water chambers. The vent holes are located at both ends of the top surface of the inlet and outlet water chambers.

5. The high-efficiency heater with flow equalization orifice according to claim 1, characterized in that: The inlet water chamber and the outlet water chamber are symmetrically arranged on both sides of the shell, and the top surface of both the inlet water chamber and the outlet water chamber is a sloping surface that slopes downward from the inside of the shell to the outside.

6. The high-efficiency heater with flow equalization orifice according to claim 1, characterized in that: The inclination angle of the bottom surface of the medium cavity is 1°-60°.

7. The high-efficiency heater with flow equalization orifice according to claim 1, characterized in that: The flow channel on the bottom surface of the medium cavity is a baffle wall extending from the inlet water chamber to the outlet water chamber.

8. The high-efficiency heater with flow equalization orifice according to claim 6, characterized in that: The retaining wall adopts a planar structure perpendicular to the bottom surface of the medium cavity, and the top of the retaining wall is serrated, straight, or arc-shaped.

9. The high-efficiency heater with flow equalization orifice according to claim 6, characterized in that: The retaining wall adopts a structure of continuously arranged rectangular, circular, or polygonal columns.

10. The high-efficiency heater with flow equalization orifice according to claim 6, characterized in that: The inlet water chamber and outlet water chamber are integrally cast with the shell; or the inlet water chamber and outlet water chamber are separately set from the shell, and the inlet water chamber and outlet water chamber are fixedly connected to the shell by bolts or welding.

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