A thick film on-board heater

Abstract

The utility model relates to a kind of thick film type vehicle-mounted heater, it includes shell, the shell is provided with the slot of through;Heating pipe, the heating pipe is installed in the slot, the heating pipe inside has first flow channel, the first flow channel is provided with radiating fin, the heating pipe and the inner wall of the slot form the second flow channel of being arranged around the heating pipe, the first flow channel, the second flow channel share same water inlet pipe and water outlet pipe installed in the shell outside;Thick film, the thick film is attached on the heating pipe, the thick film has oppositely arranged first face and second face, the first face of the thick film is used to heat the first flow channel, the second face of the thick film is used to heat the second flow channel.The utility model can be attached on the heater with double-layer flow channel by thick film, it simultaneously heats first flow channel and second flow channel, and heat loss is small.

Description

Technical Field

[0001] This utility model relates to a heater, and more particularly to a thick-film vehicle-mounted heater. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] In a vehicle's thermal management system, a heater is typically installed. It works in conjunction with the refrigerant in the thermal management system to control the temperature of the fluid, thereby managing the temperature of the vehicle's air conditioning system, battery cooling system, motor cooling system, and so on.

[0004] There is a type of thick-film heater that can directly heat a large area of ​​the tubes, plate structures, etc. to which the film is attached, and then indirectly heat the fluid inside the tubes, plate structures, etc.

[0005] In existing structures, thick films are mostly heated on one side. However, thick films actually radiate equal amounts of heat energy on both sides, resulting in a significant waste of heat energy in existing thick film heating processes. This also causes unnecessary temperature increases in nearby structures such as compressors and controllers, leading to overheating and even damage.

[0006] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0007] The purpose of this invention is to provide a thick-film vehicle heater that can heat both the first and second channels simultaneously by attaching a thick film to a heater with a double-layer flow channel, resulting in minimal heat loss.

[0008] To achieve the above objectives, this utility model discloses a thick-film vehicle-mounted heater, which includes:

[0009] A housing having a through slot;

[0010] A heating element is installed in the slot. The heating element has a first flow channel inside and heat dissipation fins are provided in the first flow channel. A second flow channel is formed between the heating element and the inner wall of the slot, surrounding the heating element. The first flow channel and the second flow channel share the same water inlet pipe and water outlet pipe installed outside the housing.

[0011] A thick film is attached to the heating tube. The thick film has a first side and a second side that are disposed opposite to each other. The first side of the thick film is used to heat the first flow channel, and the second side of the thick film is used to heat the second flow channel.

[0012] As a further description of the above technical solution, the thick film is attached to the outer wall of the heating tube.

[0013] As a further description of the above technical solution, the cross-sectional area of ​​the first flow channel is larger than that of the second flow channel, and the heat dissipation fins are installed in the cavity of the heating tube from the first end to the second end of the heating tube, so that the temperature difference of the water flowing from the first end to the second end of the heating tube is the same as the temperature difference of the water flowing from the first end to the second end of the second flow channel.

[0014] As a further description of the above technical solution, the ratio of the cross-sectional area of ​​the first flow channel to the cross-sectional area of ​​the second flow channel is 2.5 to 1.

[0015] As a further description of the above technical solution, a transition block is fixed to one end face of the shell. The transition block has an inlet and an outlet. The inlet conduit is installed at the inlet position of the transition block and connected to the first end of the heating tube. The outlet conduit is installed at the outlet position of the transition block and connected to the second end of the heating tube.

[0016] As a further description of the above technical solution, a first sealing ring is installed between the water inlet conduit and the transition block, and a second sealing ring is installed between the water outlet conduit and the transition block.

[0017] As a further description of the above technical solution, the diversion port is configured as a plurality of ports spaced at equal angles around the extension direction of the heating tube, and the second end of the heating tube is provided with a return port connected to the second flow channel, and the return port is configured as a plurality of ports spaced at equal angles around the extension direction of the heating tube.

[0018] As a further description of the above technical solution, a third sealing ring and a fourth sealing ring are respectively installed between the heating tube and the inner wall of the groove. The third sealing ring is located between the diversion port and the water inlet pipe, and the fourth sealing ring is located between the return port and the water outlet pipe.

[0019] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0020] This invention relates to a thick-film vehicle-mounted heater, which heats both the first and second flow channels simultaneously by attaching a thick film to the heater, resulting in minimal heat loss. Specifically, the heating tube has a first flow channel inside and a second flow channel outside. By attaching the thick film to the heating tube, the first side of the film can be used to heat the first flow channel, and the second side can be used to heat the second flow channel, thus avoiding energy waste.

[0021] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded schematic diagram of a thick-film vehicle-mounted heater provided in the embodiments of this specification;

[0024] Figure 2 This is a cross-sectional schematic diagram of a thick-film vehicle-mounted heater provided in the embodiments of this specification;

[0025] Figure 3 This is a schematic diagram of the overall installation of a thick-film vehicle-mounted heater provided in the embodiments of this specification;

[0026] Figure 4 This is a three-dimensional schematic diagram of a thick-film vehicle-mounted heater provided in the embodiments of this specification;

[0027] Figure 5 This is a three-dimensional cross-sectional view of a thick-film vehicle-mounted heater provided in the embodiments of this specification;

[0028] In the picture:

[0029] 100. Compressor;

[0030] 1. Housing; 11. Groove; 111. Second flow channel; 12. Third sealing ring; 13. Fourth sealing ring;

[0031] 2. Heating element; 21. Flow branch port; 22. Return port; 23. Heat dissipation fins; 24. First flow channel;

[0032] 3. Water inlet pipe; 31. First sealing ring;

[0033] 4. Water outlet pipe; 41. Second sealing ring;

[0034] 5. Transition block; 51. Inlet; 52. Outlet;

[0035] 6. Thick film. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0037] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0038] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0039] Please see Figure 1-5 This embodiment provides a thick-film vehicle-mounted heater, wherein the thick-film vehicle-mounted heater includes:

[0040] The housing 1 has a through slot 11.

[0041] Heating tube 2 is installed in the slot 11. The heating tube 2 has a first flow channel 24 inside. Heat dissipation fins 23 are provided in the first flow channel 24. A second flow channel 111 is formed between the heating tube 2 and the inner wall of the slot 11, which surrounds the heating tube 2. The first flow channel 24 and the second flow channel 111 share the same water inlet pipe 3 and water outlet pipe 4 installed outside the housing 1.

[0042] A thick film 6 is attached to the heating tube 2. The thick film 6 has a first side and a second side that are arranged opposite to each other. The first side of the thick film 6 is used to heat the first flow channel 24, and the second side of the thick film 6 is used to heat the second flow channel 111.

[0043] The slot 11 and the heating pipe 2 are configured as U-shaped with a bend in the middle section, and the water inlet pipe 3 and the water outlet pipe 4 are installed on the same plane.

[0044] Based on the above structure, a thick film 6 can be attached to a heater with a double-layer flow channel, simultaneously heating the first flow channel 24 and the second flow channel 24 with minimal heat loss. Specifically, the heating tube 2 has a first flow channel 24 inside and a second flow channel 111 outside. By attaching the thick film 6 to the heating tube 2, the first side of the thick film 6 can be used to heat the first flow channel 24, and the second side of the thick film 6 can be used to heat the second flow channel 111, thus avoiding the waste of heat energy.

[0045] Based on the above structure, during use, cold water can be introduced from one side of the water inlet pipe 3. Then, the cold water enters the first end of the heating tube installed in the slot 11 of the housing 1 through the water inlet pipe 3. First, a portion of the cold water flows directly from the cavity of the heating tube 2 into the first flow channel 24 and flows downstream. During the flow, under the high temperature heating of the heating tube 2 wall, heat is absorbed from the inner wall of the heating tube 2, and the temperature of the cold water fluid in the cavity of the heating tube 2 is raised until it flows to the second end of the heating tube 2 and reaches the preset temperature, thus completing the heating of the first flow channel 24.

[0046] Simultaneously, when the cold water fluid enters the first end of the heating pipe 2, another part of the fluid flows from the branch port 21 of the heating pipe 2 into the second flow channel 111 between the heating pipe 2 and the slot 11, and flows from the first end to the second end of the second flow channel 111. During the flow, under the high temperature heating of the heating pipe 2 wall, heat is absorbed from the outer wall of the heating pipe 2, and the temperature of the cold water fluid in the second flow channel 111 is raised until it flows back to the heating pipe from the return port 22 at the second end of the heating pipe 2 to complete the heating.

[0047] Finally, the heated hot water fluid in the cavity of the heating pipe 2 and the heated hot water fluid in the second flow channel 111 converge at the second end of the heating pipe 2, are discharged from the outlet pipe 4, and are delivered to the designated components of the vehicle system for heating.

[0048] The aforementioned thick film 6 is attached to the outer wall of the heating tube 2, wherein the first side of the thick film 6 faces the heating tube 2, and the second side of the thick film 6 faces away from the heating tube 2.

[0049] In the above structure, the slot 11 and the heating tube 2 are configured as a U-shape with a bend in the middle section, and the inlet pipe 3 and the outlet pipe 4 are installed on the same plane. A transition block 5 is fixed to one end face of the shell 1. The transition block 5 has an inlet 51 and an outlet 52. The inlet pipe 3 is installed at the inlet 51 of the transition block 5 and is connected to the first end of the heating tube 2. The outlet pipe 4 is installed at the outlet 52 of the transition block 5 and is connected to the second end of the heating tube 2. Based on the U-shaped structure, the shell 1 can be configured as a semi-annular structure with an opening of the slot 11 on one side, and the side with the slot 11 is sealed by the transition block 5, which facilitates the installation of the inlet pipe 3 and the outlet pipe 4. Specifically, the shell 1 can be made of aluminum-silicon-magnesium alloy, and the transition block 5 can be made of SU444 stainless steel. The combination between the two can achieve a stable structural connection through brazing. The heating tube 2 has heat dissipation fins 23 installed from the first end to the second end of the heating tube in the tube cavity. The heat dissipation fins 23 can be scale-shaped to increase the contact surface with the water flow, so that the heating tube 2 heats the water flow more evenly.

[0050] In the above structure, heating efficiency can be improved by setting two layers of flow channels inside and outside the heating tube 2, and the inlet pipe 3 and outlet pipe 4 are set on the same side by means of a U-shaped structure. At the same time, heat dissipation fins 23 are set inside the first flow channel 24 to increase the heating area of ​​the water flow. The volume can be made smaller while meeting the heating power requirements. Specifically, the heating tube 2 in this application forms a first flow channel 24 inside and a second flow channel 111 outside the heating tube 2. By heating the heating tube 2, both the inside and outside of the heating tube 2 are heated at the same time, which can significantly improve the heating efficiency. At the same time, by setting the heating tube 2 to be bent in the middle section to form a U-shaped structure with parallel ends, the inlet pipe 3 and outlet pipe 4 can be installed on the same plane of the shell 1, which lengthens the heating tube 2 while reducing the overall volume.

[0051] Existing heaters that use heating tube 2 can generally only heat the fluid inside the heating tube 2 in one direction.

[0052] In this embodiment, to ensure stable heat output of the hot water, the cross-sectional area of ​​the first flow channel 24 is larger than that of the second flow channel 111, so that the temperature difference between the water flowing from the first end to the second end of the heating pipe 2 is the same as the temperature difference between the water flowing from the first end to the second end of the second flow channel 111. That is, in this embodiment, the flow rate inside the heating pipe 2 is greater than the flow rate in the outer second flow channel 111. However, by installing heat dissipation fins 23 inside the heating pipe 2 for turbulence and auxiliary heating, the flow velocity in the heat dissipation fins 23 can be indirectly reduced, so that the same mass of fluid absorbs the same amount of heat from the wall of the heating pipe 2 under the influence of the heat dissipation fins 23 as it does in the second flow channel 111. Specifically, in this embodiment, a thick film is attached to the outer wall of the heating pipe 2 for easy connection to external power supply and easy installation, allowing the heating pipe 2 as a whole to function as a complete heat source to heat the water flowing between the inner and outer walls. Specifically, in this embodiment, the heat dissipation fins 23 can be configured as a combination of metal sheets with multiple bends in cross section. The ratio of the cross-sectional area of ​​the first flow channel 24 to the cross-sectional area of ​​the second flow channel 111 is 2.5 to 1, which makes it easy to achieve a consistent heating effect.

[0053] Further, please see Figure 2 A first sealing ring 31 is installed between the water inlet pipe 3 and the transition block 5 to prevent fluid leakage between the water inlet pipe 3 and the transition block 5. Similarly, a second sealing ring 41 is installed between the water outlet pipe 4 and the transition block 5, and its principle is the same as that of the first sealing ring 31 mentioned above.

[0054] In another embodiment, the second end of the heating tube 2 has a return port 22 connected to the second flow channel 111. The diversion ports 21 are configured as multiple ports spaced at equal angles around the extension direction of the heating tube 2, specifically four ports at equal angles, each spaced 90 degrees apart. This allows fluid to enter from four directions, and the four sets of openings can meet the flow requirements, while also simplifying the manufacturing process. Similarly, the return ports 22 are configured as multiple ports spaced at equal angles around the extension direction of the heating tube 2, with the number consistent with the number of diversion ports 21.

[0055] Please see Figure 2 A third sealing ring 12 and a fourth sealing ring 13 are respectively installed between the heating tube 2 and the inner wall of the slot 11. The third sealing ring 12 is located between the diversion port 21 and the water inlet pipe 3. The third sealing ring 12 can be locked in the protruding limiting groove on the slot 11 to prevent the displacement of the third sealing ring 12. The third sealing ring 12 is used to limit the leakage of water flow in the second flow channel 111 towards the transition block 5. Similarly, the fourth sealing ring 13 is located between the return port 22 and the water outlet pipe 4, and its principle is the same as that of the third sealing ring 12.

[0056] In another embodiment, such as Figure 3 As shown, the transition block 5 can fix the inlet pipe 3 and the outlet pipe 4 by means of threaded connection.

[0057] Please see Figure 4 The thick film vehicle heater can be installed on one side of the compressor 100. Specifically, the housing 1 can be fixed and stably installed by the contoured surface formed by the controller box and other structures set on one side of the compressor 100, which has a high degree of integration.

[0058] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

[0059] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0060] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A thick-film vehicle-mounted heater, characterized in that, The thick-film vehicle-mounted heater includes: A housing having a through slot; A heating element is installed in the slot. The heating element has a first flow channel inside and heat dissipation fins are provided in the first flow channel. A second flow channel is formed between the heating element and the inner wall of the slot, surrounding the heating element. The first flow channel and the second flow channel share the same water inlet pipe and water outlet pipe installed outside the housing. A thick film is attached to the heating tube. The thick film has a first side and a second side that are disposed opposite to each other. The first side of the thick film is used to heat the first flow channel, and the second side of the thick film is used to heat the second flow channel.

2. The thick-film vehicle-mounted heater according to claim 1, characterized in that: The thick film is attached to the outer wall of the heating tube.

3. The thick-film vehicle-mounted heater according to claim 1, characterized in that: The cross-sectional area of ​​the first flow channel is larger than that of the second flow channel. The heat dissipation fins are installed in the cavity of the heating tube from the first end to the second end of the heating tube, so that the temperature difference between the water flowing from the first end to the second end of the heating tube is the same as the temperature difference between the water flowing from the first end to the second end of the second flow channel.

4. The thick-film vehicle-mounted heater according to claim 3, characterized in that: The ratio of the cross-sectional area of ​​the first flow channel to the cross-sectional area of ​​the second flow channel is 2.5 to 1.

5. The thick-film vehicle-mounted heater according to claim 1, characterized in that: A transition block is fixed to one end face of the housing. The transition block has an inlet and an outlet. The inlet conduit is installed at the inlet position of the transition block and connected to the first end of the heating tube. The outlet conduit is installed at the outlet position of the transition block and connected to the second end of the heating tube.

6. The thick-film vehicle-mounted heater according to claim 5, characterized in that: A first sealing ring is installed between the water inlet pipe and the transition block, and a second sealing ring is installed between the water outlet pipe and the transition block.

7. The thick-film vehicle-mounted heater according to claim 1, characterized in that: The heating tube is provided with a flow divider, which is a plurality of flow dividers arranged at equal angular intervals around the extension direction of the heating tube. The second end of the heating tube is provided with a return port connected to the second flow channel, which is a plurality of return ports arranged at equal angular intervals around the extension direction of the heating tube.

8. The thick-film vehicle-mounted heater according to claim 7, characterized in that: A third sealing ring and a fourth sealing ring are respectively installed between the heating tube and the inner wall of the slot. The third sealing ring is located between the diversion port and the water inlet pipe, and the fourth sealing ring is located between the return port and the water outlet pipe.

9. The thick-film vehicle-mounted heater according to claim 1, characterized in that: The slot and the heating pipe are configured as a U-shape with a bend in the middle section, and the water inlet pipe and the water outlet pipe are installed on the same plane.

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