Thick film heater

Abstract

The utility model relates to the technical field of heating devices, in particular to a thick film heater which comprises a hollow shell, a first cavity and a second cavity which are isolated from each other are arranged in an inner cavity of the shell, a base plate is arranged in the first cavity, and a U-shaped flow channel is arranged on the inner side wall of the first cavity. A plurality of sets of heat dissipation tooth-shaped structures which are sequentially and closely arranged in the first direction are arranged on the side face, close to the U-shaped flow channel, of the base plate, the multiple sets of heat dissipation tooth-shaped structures are distributed corresponding to the area of the U-shaped flow channel, and teeth in any two adjacent sets of heat dissipation tooth-shaped structures are sequentially arranged in a staggered mode in the second direction. Due to the design of the tooth-shaped staggered structure, cooling liquid in the first cavity does not directly flow through the cavity but is continuously disturbed by the tooth-shaped staggered structure, the cooling liquid is scattered, and bubbles are not generated in the flowing process of the cooling liquid; and the tooth-shaped staggered structure can increase the contact area between the cooling liquid and the substrate, more heat is taken away, the heat transfer effect is improved, the service life of the product can be prolonged, and the stability of the product can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heating devices, in particular to a thick film heater. Background Art

[0002] As the climate becomes increasingly warmer, the country's requirements for carbon emissions are further deepened, the new energy vehicle market is booming, and more and more car manufacturers are investing funds and technologies in the research and development of new energy vehicles. The heater used to provide heat sources for battery packs and passenger compartments has also become an indispensable part of new energy vehicles. The high-voltage liquid heater is located in the coolant circuit and is mainly used to heat ethylene glycol coolant, and convert heat to the battery pack and passenger compartment through the coolant. At present, the high-voltage liquid heaters on the market mainly include PTC type, thick film type and electric heating wire, among which PTC type and thick film type will become the mainstream in the future.

[0003] At present, most of the traditional thick film heaters have no turbulent structure designed in the cavity for turbulence. The coolant flows out directly from the cavity. The area of ​​the thick film heating plate that the coolant contacts is small. The heat conduction efficiency between the thick film heating plate and the coolant is poor, resulting in poor heating effect. Bubbles are also prone to appear during the flow of coolant, resulting in local high temperature of the thick film heating plate and damage to the product. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a thick film heater which can continuously generate turbulence, so that the cooling liquid in the cavity is dispersed and no bubbles are generated during the flow process.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A thick film heater, comprising a hollow shell, wherein the inner cavity of the shell is provided with a first chamber and a second chamber isolated from each other, a substrate is provided in the first chamber, a U-shaped flow channel is provided on the inner side wall of the first chamber, a screen printing layer is provided on a side surface of the substrate away from the U-shaped flow channel, a side surface of the substrate close to the U-shaped flow channel is provided with a plurality of groups of heat dissipation tooth-shaped structures arranged closely in sequence along a first direction, the plurality of groups of heat dissipation tooth-shaped structures are distributed in regions corresponding to the U-shaped flow channel, the teeth in any two adjacent groups of the heat dissipation tooth-shaped structures are arranged alternately in sequence along a second direction, and the first direction and the second direction are two mutually perpendicular directions;

[0007] A PCBA board is provided in the second chamber, a heating assembly is provided on the PCBA board, the heating assembly is electrically connected to the PCBA board, a liquid inlet pipe and a liquid outlet pipe are provided on the outer side wall of the shell, and the liquid inlet pipe and the liquid outlet pipe are both connected to the first chamber.

[0008] Furthermore, the heat dissipation tooth-shaped structure includes a plurality of tooth-shaped parts connected in sequence, wherein the tooth-shaped parts include an inverted U-shaped tooth and a U-shaped tooth, the inverted U-shaped tooth and the U-shaped tooth are connected to form a complete tooth-shaped part, and a plurality of the tooth-shaped parts are connected to form a wavy heat dissipation tooth-shaped structure, and the inverted U-shaped teeth and U-shaped teeth in each group of the heat dissipation tooth-shaped structures are staggered one by one with the corresponding inverted U-shaped teeth and U-shaped teeth in the adjacent heat dissipation tooth-shaped structures.

[0009] Furthermore, the inverted U-shaped teeth in each group of the heat dissipation tooth-shaped structures and the corresponding inverted U-shaped teeth in the adjacent heat dissipation tooth-shaped structures are arranged in a manner of staggered half U-shaped teeth, and the U-shaped teeth in each group of the heat dissipation tooth-shaped structures and the corresponding U-shaped teeth in the adjacent heat dissipation tooth-shaped structures are arranged in a manner of staggered half U-shaped teeth.

[0010] Furthermore, the shell includes an upper cover, a middle shell and a lower cover, the inner cavity of the middle shell is provided with a partition, the partition divides the middle shell into a first chamber and a second chamber, the lower cover is arranged at the opening of the first chamber, and the upper cover is arranged at the opening of the second chamber.

[0011] Furthermore, the edges of the two openings of the middle shell are provided with grooves, the grooves are coated with adhesive, and the upper cover and the lower cover are connected and fixed to the middle shell by the adhesive.

[0012] The beneficial effects of the utility model are:

[0013] In this solution, a plurality of groups of heat dissipation tooth-shaped structures are arranged closely in sequence along a first direction on a side surface of the substrate close to the U-shaped flow channel. The plurality of groups of heat dissipation tooth-shaped structures correspond to the regional distribution of the U-shaped flow channel, and the teeth in any two adjacent groups of heat dissipation tooth-shaped structures are arranged alternately in sequence along the second direction. The design of the tooth-shaped staggered structure ensures that the coolant in the first cavity does not flow directly through the cavity, but is continuously disturbed by the tooth-shaped staggered structure, and the coolant is broken up, so that no bubbles are generated during its flow; and the tooth-shaped staggered structure can also increase the contact area between the coolant and the substrate, take away more heat, increase the heat transfer effect, and thereby improve the service life and stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 An exploded view of the thick film heater of the utility model;

[0015] Figure 2 It is a schematic structural diagram of a thick film heating plate of a thick film heater of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the middle shell of the thick film heater of the utility model;

[0017] Figure 4It is a schematic structural diagram of a thick film heating plate of a thick film heater of the utility model;

[0018] Figure 5 The thick film heater of the utility model Figure 4 A side view structural schematic diagram of;

[0019] Figure 6 The thick film heater of the utility model Figure 5 The enlarged view of point A in the middle;

[0020] Description of labels:

[0021] 1. Shell; 11. Upper cover; 12. Middle shell; 121. Groove; 13. Lower cover; 2. First chamber; 21. Base plate; 22. Heat dissipation tooth-shaped structure; 221. Inverted U-shaped tooth; 222. U-shaped tooth; 23. Silk screen printing layer; 3. Second chamber; 31. PCBA board; 4. Liquid inlet pipe; 5. Liquid outlet pipe. DETAILED DESCRIPTION

[0022] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0023] Please refer to Figure 1 , the technical solution adopted by the utility model is:

[0024] A thick film heater, comprising a hollow shell, wherein the inner cavity of the shell is provided with a first chamber and a second chamber isolated from each other, a substrate is provided in the first chamber, a U-shaped flow channel is provided on the inner side wall of the first chamber, a screen printing layer is provided on a side surface of the substrate away from the U-shaped flow channel, a side surface of the substrate close to the U-shaped flow channel is provided with a plurality of groups of heat dissipation tooth-shaped structures arranged closely in sequence along a first direction, the plurality of groups of heat dissipation tooth-shaped structures are distributed in regions corresponding to the U-shaped flow channel, the teeth in any two adjacent groups of the heat dissipation tooth-shaped structures are arranged alternately in sequence along a second direction, and the first direction and the second direction are two mutually perpendicular directions;

[0025] A PCBA board is provided in the second chamber, a heating assembly is provided on the PCBA board, the heating assembly is electrically connected to the PCBA board, a liquid inlet pipe and a liquid outlet pipe are provided on the outer side wall of the shell, and the liquid inlet pipe and the liquid outlet pipe are both connected to the first chamber.

[0026] From the above description, it can be seen that the beneficial effects of the utility model are:

[0027] In this solution, a plurality of groups of heat dissipation tooth-shaped structures are arranged closely in sequence along a first direction on a side surface of the substrate close to the U-shaped flow channel. The plurality of groups of heat dissipation tooth-shaped structures correspond to the regional distribution of the U-shaped flow channel, and the teeth in any two adjacent groups of heat dissipation tooth-shaped structures are arranged alternately in sequence along the second direction. The design of the tooth-shaped staggered structure ensures that the coolant in the first cavity does not flow directly through the cavity, but is continuously disturbed by the tooth-shaped staggered structure, and the coolant is broken up, so that no bubbles are generated during its flow; and the tooth-shaped staggered structure can also increase the contact area between the coolant and the substrate, take away more heat, increase the heat transfer effect, and thereby improve the service life and stability of the product.

[0028] Furthermore, the heat dissipation tooth-shaped structure includes a plurality of tooth-shaped parts connected in sequence, wherein the tooth-shaped parts include an inverted U-shaped tooth and a U-shaped tooth, the inverted U-shaped tooth and the U-shaped tooth are connected to form a complete tooth-shaped part, and a plurality of the tooth-shaped parts are connected to form a wavy heat dissipation tooth-shaped structure, and the inverted U-shaped teeth and U-shaped teeth in each group of the heat dissipation tooth-shaped structures are staggered one by one with the corresponding inverted U-shaped teeth and U-shaped teeth in the adjacent heat dissipation tooth-shaped structures.

[0029] It can be seen from the above description that by providing the above structure, the turbulence effect and the heat transfer effect can be further improved, thereby further improving the service life and stability of the product.

[0030] Furthermore, the inverted U-shaped teeth in each group of the heat dissipation tooth-shaped structures and the corresponding inverted U-shaped teeth in the adjacent heat dissipation tooth-shaped structures are arranged in a manner of staggered half U-shaped teeth, and the U-shaped teeth in each group of the heat dissipation tooth-shaped structures and the corresponding U-shaped teeth in the adjacent heat dissipation tooth-shaped structures are arranged in a manner of staggered half U-shaped teeth.

[0031] From the above description, it can be seen that the inverted U-shaped teeth in the heat dissipation tooth structure and the corresponding inverted U-shaped teeth in the adjacent heat dissipation tooth structure, and the U-shaped teeth in the heat dissipation tooth structure and the corresponding U-shaped teeth in the adjacent heat dissipation tooth structure are arranged in a staggered half U-shaped tooth manner, which can optimize the turbulence effect and heat transfer effect, thereby further improving the service life and stability of the product.

[0032] Furthermore, the shell includes an upper cover, a middle shell and a lower cover, the inner cavity of the middle shell is provided with a partition, the partition divides the middle shell into a first chamber and a second chamber, the lower cover is arranged at the opening of the first chamber, and the upper cover is arranged at the opening of the second chamber.

[0033] Furthermore, the edges of the two openings of the middle shell are provided with grooves, the grooves are coated with adhesive, and the upper cover and the lower cover are connected and fixed to the middle shell by the adhesive.

[0034] Please refer to Figures 1 to 6 As shown, the first embodiment of the utility model is:

[0035] Please refer to Figure 1 To Figure Figure 3 A thick film heater comprises a hollow shell 1, wherein the inner cavity of the shell 1 is provided with a first chamber 2 and a second chamber 3 which are isolated from each other, wherein a substrate 21 is provided in the first chamber 2, and a U-shaped flow channel is provided on the inner side wall of the first chamber 2, and a screen printing layer 23 is provided on a side surface of the substrate 21 away from the U-shaped flow channel, and a side surface of the substrate 21 close to the U-shaped flow channel is provided with a plurality of groups of heat dissipation tooth-shaped structures 22 which are arranged closely in sequence along a first direction, wherein the plurality of groups of the heat dissipation tooth-shaped structures 22 are distributed in regions corresponding to the U-shaped flow channel, and the teeth in any two adjacent groups of the heat dissipation tooth-shaped structures 22 are arranged alternately in sequence along a second direction, and the first direction and the second direction are two directions perpendicular to each other;

[0036] The substrate 21 , the screen-printed layer 23 and the heat dissipation tooth-shaped structure 22 constitute a thick film heating plate.

[0037] Please refer to Figure 1 A PCBA board 31 is provided in the second chamber 3, a heating component is provided on the PCBA board 31, and the heating component is electrically connected to the PCBA board 31. A liquid inlet pipe 4 and a liquid outlet pipe 5 are provided on the outer wall of the shell 1, and the liquid inlet pipe 4 and the liquid outlet pipe 5 are both connected to the first chamber 2.

[0038] Please refer to Figure 2 The heat dissipation tooth-shaped structure 22 includes a plurality of tooth-shaped parts connected in sequence, wherein the tooth-shaped parts include an inverted U-shaped tooth 221 and a U-shaped tooth 222, wherein the inverted U-shaped tooth 221 and the U-shaped tooth 222 are connected to form a complete tooth-shaped part, and a plurality of the tooth-shaped parts are connected to form a wavy heat dissipation tooth-shaped structure 22, and the inverted U-shaped teeth 221 and the U-shaped teeth 222 in each group of the heat dissipation tooth-shaped structures 22 are staggered one by one with the corresponding inverted U-shaped teeth 221 and the U-shaped teeth 222 in the adjacent heat dissipation tooth-shaped structures 22.

[0039] Please refer to Figure 5 and Figure 6 The inverted U-shaped teeth 221 in each group of the heat dissipation tooth-shaped structures 22 and the corresponding inverted U-shaped teeth 221 in the adjacent heat dissipation tooth-shaped structures 22 are arranged in a manner of staggered half U-shaped teeth 222, and the U-shaped teeth 222 in each group of the heat dissipation tooth-shaped structures 22 and the corresponding U-shaped teeth 222 in the adjacent heat dissipation tooth-shaped structures 22 are arranged in a manner of staggered half U-shaped teeth 222.

[0040] Please refer to Figure 6 The inverted U-shaped teeth 221 and the U-shaped teeth 222 have the same structure and size, and are both metal sheets bent into a U shape.

[0041] The inverted U-shaped teeth 221 and the U-shaped teeth 222 are both made of aluminum alloy.

[0042] Please refer to Figure 1 and Figure 3 The shell 1 includes an upper cover 11, a middle shell 12 and a lower cover 13. The inner cavity of the middle shell 12 is provided with a partition, and the partition divides the middle shell 12 into a first chamber 2 and a second chamber 3. The lower cover 13 is covered at the opening of the first chamber 2, and the upper cover 11 is covered at the opening of the second chamber 3.

[0043] Please refer to Figure 3 The edges of the two openings of the middle shell 12 are both provided with grooves 121, and the grooves 121 are coated with adhesive. The upper cover 11 and the lower cover 13 are connected and fixed to the middle shell 12 by adhesive.

[0044] To sum up, the utility model provides a thick film heater, which is provided with a plurality of groups of heat dissipation tooth-shaped structures arranged closely in sequence along a first direction on a side surface of a substrate close to the U-shaped flow channel, the plurality of groups of heat dissipation tooth-shaped structures correspond to the regional distribution of the U-shaped flow channel, and the teeth in any two adjacent groups of heat dissipation tooth-shaped structures are staggered in sequence along the second direction. The design of the tooth-shaped staggered structure makes it possible for the coolant in the first cavity to not flow directly through the cavity, but to be continuously disturbed by the tooth-shaped staggered structure, so that the coolant is broken up and no bubbles are generated during its flow; and the tooth-shaped staggered structure can also increase the contact area between the coolant and the substrate, take away more heat, increase the heat transfer effect, and thereby improve the service life and stability of the product.

[0045] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A thick film heater, characterized in that: A shell having a hollow interior is provided, wherein the inner cavity of the shell is provided with a first chamber and a second chamber isolated from each other, a substrate is provided in the first chamber, a U-shaped flow channel is provided on the inner side wall of the first chamber, a screen printing layer is provided on a side surface of the substrate away from the U-shaped flow channel, a side surface of the substrate close to the U-shaped flow channel is provided with a plurality of groups of heat dissipation tooth-shaped structures arranged closely in sequence along a first direction, the plurality of groups of heat dissipation tooth-shaped structures are distributed in regions corresponding to the U-shaped flow channel, the teeth in any two adjacent groups of the heat dissipation tooth-shaped structures are arranged alternately in sequence along a second direction, and the first direction and the second direction are two mutually perpendicular directions; A PCBA board is provided in the second chamber, a heating assembly is provided on the PCBA board, the heating assembly is electrically connected to the PCBA board, a liquid inlet pipe and a liquid outlet pipe are provided on the outer side wall of the shell, and the liquid inlet pipe and the liquid outlet pipe are both connected to the first chamber.

2. The thick film heater according to claim 1, characterized in that The heat dissipation tooth-shaped structure includes a plurality of tooth-shaped parts connected in sequence, wherein the tooth-shaped parts include an inverted U-shaped tooth and a U-shaped tooth, wherein the inverted U-shaped tooth and the U-shaped tooth are connected to form a complete tooth-shaped part, and a plurality of the tooth-shaped parts are connected to form a wavy heat dissipation tooth-shaped structure, and the inverted U-shaped teeth and U-shaped teeth in each group of the heat dissipation tooth-shaped structures are staggered one by one with the corresponding inverted U-shaped teeth and U-shaped teeth in the adjacent heat dissipation tooth-shaped structures.

3. The thick film heater according to claim 2, characterized in that The inverted U-shaped teeth in each group of the heat dissipation tooth-shaped structures and the corresponding inverted U-shaped teeth in the adjacent heat dissipation tooth-shaped structures are arranged in a manner of staggered half U-shaped teeth, and the U-shaped teeth in each group of the heat dissipation tooth-shaped structures and the corresponding U-shaped teeth in the adjacent heat dissipation tooth-shaped structures are arranged in a manner of staggered half U-shaped teeth.

4. The thick film heater according to claim 1, characterized in that The shell comprises an upper cover, a middle shell and a lower cover. The inner cavity of the middle shell is provided with a partition, and the partition divides the middle shell into a first chamber and a second chamber. The lower cover is arranged at the opening of the first chamber, and the upper cover is arranged at the opening of the second chamber.

5. The thick film heater according to claim 4, characterized in that The edges of the two openings of the middle shell are both provided with grooves, and adhesive is coated in the grooves. The upper cover and the lower cover are connected and fixed to the middle shell by adhesive.

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