An integrated automotive liquid heater

Abstract

This utility model discloses an integrated automotive liquid heater, including a liquid heating tube and a terminal block. The liquid heating tube includes two heating elements, each with a heating element on its outer wall and a power terminal. The heating elements are interconnected via a connecting channel. A terminal block is provided between the heating elements, comprising a detachably fixed upper housing and a lower housing. The upper housing has upper contact surfaces on both sides that abut against the outer circumference of the heating elements, and the lower housing has lower contact surfaces on both sides that abut against the outer circumference of the heating elements. After the upper and lower housings are fixed together, the terminal block is clamped and fixed between the heating elements via the upper and lower contact surfaces. The terminal block also has a power terminal for connecting the power terminals of the heating elements. This utility model has advantages such as simple structure, low processing cost, small space occupation, convenient wiring, and high assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of liquid heater technology, specifically an integrated automotive liquid heater. Background Technology

[0002] Automotive liquid heaters heat the antifreeze circulating medium in automotive engines, directly transferring heat to the radiator and defrost system inside the vehicle, providing a heat source for engine start-up in low temperatures and heating the vehicle interior. As the heating efficiency requirements for automotive liquid heaters increase, the heating element is being replaced with a thick-film heater to improve heating efficiency. Patent publication number CN218033698U discloses an automotive liquid heater, specifically including a heating box, a top cover, and a bottom cover. The heating box has a flow channel at its top interior, and a heating plate is fixedly connected to the top surface inside the heating box. A thick-film heating layer is printed on the upper surface of the heating plate. However, this design suffers from problems such as complex structure, large size, high processing cost, and low assembly efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide an integrated automotive liquid heater with simple structure, low processing cost, small size and small space occupation; convenient wiring and high assembly efficiency; and high degree of integration, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an integrated automotive liquid heater, comprising a liquid heating tube and a terminal block. The liquid heating tube includes two parallel heating elements, each with a heating element on its outer wall and a power terminal on its heating element. The heating elements are interconnected on one side via a connecting channel. A gap is left between the heating elements, and a terminal block is fixedly mounted thereon. The terminal block includes a detachably fixed upper housing and a lower housing. Both sides of the upper housing have upper contact surfaces that abut against the outer circumference of the heating elements, and both sides of the lower housing have lower contact surfaces that abut against the outer circumference of the heating elements. After the upper and lower housings are fixed together, the terminal block is clamped and fixed between the heating elements by the upper and lower contact surfaces. The terminal block also has a power terminal for connecting the power terminal of the heating elements.

[0005] Furthermore, the heating element provided on the heating tube is a thick-film heating element, and the liquid heating tube has a U-shaped tube structure.

[0006] Furthermore, both the upper and lower contact surfaces are concave arc surface structures.

[0007] Furthermore, the upper housing is threaded with a connecting screw, and the connecting screw is a self-tapping screw, and the upper housing is threadedly connected to the lower housing through the connecting screw.

[0008] Furthermore, the power terminal is fixedly mounted on the lower housing. The power terminal includes a vertically arranged power terminal piece. The top end of the power terminal piece penetrates through the lower housing and the upper housing. The end of the power terminal piece is provided with a horizontally arranged transition conductive piece. Both sides of the transition conductive piece are provided with abutment springs. The abutment springs are used to abut against and adhere to the power terminal on the corresponding heating tube.

[0009] Furthermore, each heating element is equipped with a temperature sensing element, and the terminal block is equipped with a temperature sensing element terminal for connecting the temperature sensing element terminals of the heating elements.

[0010] Furthermore, the temperature sensing element terminal includes two temperature sensing element terminals 1 and one temperature sensing element terminal 2, both of which are fixedly mounted on the lower housing. The temperature sensing element terminal 2 has the same structure as the power supply terminal, and its two abutting springs 1 are used to abut against and fit against the positive terminal of the temperature sensing element on the corresponding heating element. The temperature sensing element terminal 1 has an L-shaped structure, with its top end penetrating through the lower and upper housings, and its bottom end is provided with abutting springs 2, which are used to abut against and fit against the negative terminal of the temperature sensing element on the corresponding heating element.

[0011] Furthermore, it also includes a mounting base, which is a plate-shaped structure with two connection holes that are adapted to the outer diameter of the heating tube. The mounting base is fixedly sleeved on the heating tube of the liquid heating tube through the connection holes, and the mounting base is also provided with mounting holes.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This integrated automotive liquid heater consists of two heating tubes and a connecting channel, forming a liquid heating tube for heating liquid. It provides good liquid heating effect. The liquid heating tube has a U-shaped tube structure, and the mounting base is installed on the liquid heating tube. The structure is simple, the processing cost is low, and it occupies little space. The terminal block is fixed to the liquid heating tube by a snap-fit ​​method. The power terminal is abutted against the corresponding power terminal on the heating tube via abutting spring one. The temperature sensing element terminal block one is abutted against the negative terminal of the temperature sensing element on the corresponding heating tube via abutting spring two, and the temperature sensing element terminal block two is abutted against the positive terminal of the temperature sensing element on the corresponding heating tube via abutting spring one. The wiring between each terminal and the heating tube can be completed during the fixing and assembly of the terminal block, making wiring convenient and assembly efficient. It also has a high degree of integration. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the terminal block structure of this utility model; Figure 4 This is an exploded view of the terminal block of this utility model; Figure 5 This is a schematic diagram showing the clamping fit between the terminal block and the liquid heating tube of this utility model; Figure 6 This is a schematic diagram of the power supply terminal structure of this utility model; Figure 7 This is a schematic diagram of the wiring terminal structure of the temperature sensing element of this utility model.

[0014] In the diagram: 1. Liquid heating tube; 11. Heating fitting; 12. Connecting channel; 2. Mounting base; 21. Connecting hole; 22. Mounting hole; 3. Terminal block; 31. Upper housing; 311. Connecting screw; 312. Clearance hole; 313. Upper abutment surface; 32. Lower housing; 321. Lower abutment surface; 33. Power terminal; 331. Power connection piece; 332. Transition conductive piece; 333. Abutment spring piece one; 34. Temperature sensing element terminal; 341. Temperature sensing element connection piece one; 3411. Abutment spring piece two; 342. Temperature sensing element connection piece two. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0016] Please see Figure 1-3 This utility model provides a technical solution: an integrated automotive liquid heater, including a liquid heating tube 1 and a terminal block 3. The liquid heating tube 1 includes two parallel heating tubes 11, each with a heating element on its outer wall and a power terminal on the heating element. The ends of the heating tubes 11 are connected to each other through a connecting channel 12. In this embodiment, the heating element on the heating tube 11 is a thick-film heating element, and the liquid heating tube 1 has a U-shaped tube structure. A gap is left between the heating tubes 11, and the terminal block 3 is fixedly installed therein. The system also includes a mounting base 2, which is a plate-shaped structure with two connecting holes 21 that are adapted to the outer diameter of the heating tubes 11. The mounting base 2 is fixedly sleeved on the heating tubes 11 of the liquid heating tube 1 through the connecting holes 21, and the mounting base 2 also has mounting holes 22. In this embodiment, the mounting base 2 is welded and fixed to the liquid heating tube 1. Please refer to the following: Figure 4-5The terminal block 3 includes a detachably fixed upper housing 31 and a lower housing 32. The upper housing 31 has upper abutment surfaces 313 on both sides that abut against the outer circumference of the heating tube 11. The lower housing 32 has lower abutment surfaces 321 on both sides that abut against the outer circumference of the heating tube 11. Both the upper abutment surfaces 313 and the lower abutment surfaces 321 are concave arc surface structures. After the upper housing 31 and the lower housing 32 are fixed to each other, the terminal block 3 is clamped and fixed between the heating tube 11 through the upper abutment surfaces 313 and the lower abutment surfaces 321. In this embodiment, the upper housing 31 is threaded with a connecting screw 311, and the connecting screw 311 is a self-tapping screw. The upper housing 31 is threaded to the lower housing 32 through the connecting screw 311. Please refer to the following: Figure 4-7 The terminal block 3 is also provided with a power terminal 33 for connecting the power terminal of the heating tube 11; the power terminal 33 is fixedly installed on the lower housing 32, and the power terminal 33 includes a vertically arranged power terminal piece 331. The top end of the power terminal piece 331 passes through the lower housing 32 and the upper housing 31. The end of the power terminal piece 331 is provided with a horizontally arranged transition conductive piece 332, and both sides of the transition conductive piece 332 are provided with abutment springs 333. The abutment springs 333 are used to abut against and fit the power terminal on the corresponding heating tube 11. Each heating element 11 is equipped with a temperature sensing element, and the terminal block 3 is equipped with a temperature sensing element terminal 34 for connecting the terminals of the temperature sensing elements on the heating element 11. The temperature sensing element terminal 34 includes two temperature sensing element connecting pieces 341 and one temperature sensing element connecting piece 342, both of which are fixedly mounted on the lower housing 32. The temperature sensing element connecting piece 342 has the same structure as the power terminal 33, and its two abutting springs 333 are used to abut against and fit against the positive terminal of the temperature sensing element on the corresponding heating element 11. The temperature sensing element connection piece 341 has an L-shaped structure. The top end of the temperature sensing element connection piece 341 penetrates through the lower housing 32 and the upper housing 31. The bottom end of the temperature sensing element connection piece 341 is provided with a second abutment spring 3411, which is used to abut against and fit the negative terminal of the temperature sensing element on the corresponding heating tube 11. The upper housing 31 is provided with clearance holes 312 at the positions of the corresponding power supply connection piece 331, temperature sensing element connection piece 341, and temperature sensing element connection piece 342. In this embodiment, the power supply terminal 33 and the temperature sensing element terminal 34 are both injection molded and fixed in the lower housing 32.

[0017] In use: Place the lower housing 32 facing upwards below the open end of the liquid heating tube 1, so that the lower abutment surface 321 of the lower housing 32 abuts against the outer circumference of the heating tube 11, and make the abutment spring 333 of the power terminal 33 abut against the corresponding power terminal on the heating tube 11, make the abutment spring 3411 of the temperature sensing element connector 341 abut against the corresponding negative terminal of the temperature sensing element on the heating tube 11, and make the abutment spring 333 of the temperature sensing element connector 342 abut against the corresponding positive terminal of the temperature sensing element on the heating tube 11; place the upper housing 31 on the liquid heating tube On the upper side of the opening end, the upper abutment surface 313 of the upper housing 31 abuts against the outer circumference of the heating tube 11. The top ends of the power supply terminal 331, the first temperature sensing element terminal 341, and the second temperature sensing element terminal 342 all pass through the corresponding clearance holes 312, and the upper housing 31 and the lower housing 32 are fixed to each other by connecting screws 311. Then, the mounting base 2 is fixedly connected to the heating tube 11 of the liquid heating tube 1. The liquid heater is fixed in the car through the mounting hole 22 provided on the mounting base 2. The two ends of the liquid heating tube 1 are respectively used as the liquid inlet and the liquid outlet, and the liquid is heated by the heating tube 11. The integrated automotive liquid heater disclosed in this embodiment consists of two heating tubes 11 and a connecting channel 12, forming a liquid heating tube 1 for heating liquid. It has good liquid heating effect. The liquid heating tube 1 has a U-shaped tube structure. The mounting base 2 is installed on the liquid heating tube 1. The structure is simple, the processing cost is low, and the space occupied is small. The terminal block 3 is fixed to the liquid heating tube 1 by snap-fit. The power terminal 33 is abutted and attached to the power terminal on the corresponding heating tube 11 through the abutting spring 333. The temperature sensing element terminal 341 is abutted and attached to the negative terminal of the temperature sensing element on the corresponding heating tube 11 through the abutting spring 3411. The temperature sensing element terminal 342 is abutted and attached to the positive terminal of the temperature sensing element on the corresponding heating tube 11 through the abutting spring 333. The wiring of each terminal and the heating tube 11 can be completed during the fixed assembly of the terminal block 3. The wiring is convenient and the assembly efficiency is high.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated automotive liquid heater, comprising a liquid heating pipe and a terminal block, characterized in that: The liquid heating tube includes two parallel heating tubes. Heating elements are provided on the outer walls of the heating tubes, and each heating element has a power terminal. The heating tubes are interconnected on one side via a connecting channel. A gap is left between the heating tubes, and a terminal block is fixedly installed there. The terminal block includes a detachably fixed upper shell and a lower shell. Both sides of the upper shell have upper contact surfaces that abut against the outer circumference of the heating tubes, and both sides of the lower shell have lower contact surfaces that abut against the outer circumference of the heating tubes. After the upper and lower shells are fixed together, the terminal block is clamped and fixed between the heating tubes by the upper and lower contact surfaces. The terminal block also has a power terminal for connecting the power terminals of the heating tubes.

2. An integrated automotive liquid heater according to claim 1, characterized in that: The heating element provided on the heating tube is a thick film heating element, and the liquid heating tube has a U-shaped tube structure.

3. An integrated automotive liquid heater according to claim 1, characterized in that: Both the upper and lower contact surfaces are concave arc-shaped structures.

4. An integrated automotive liquid heater according to claim 1, characterized in that: The upper housing is threaded with a connecting screw, which is a self-tapping screw, and the upper housing is threadedly connected to the lower housing through the connecting screw.

5. An integrated automotive liquid heater according to claim 1, characterized in that: The power terminal is fixedly installed on the lower housing. The power terminal includes a vertically arranged power terminal piece. The top of the power terminal piece penetrates through the lower housing and the upper housing. The end of the power terminal piece is provided with a horizontally arranged transition conductive piece. Both sides of the transition conductive piece are provided with abutment springs. The abutment springs are used to abut against and fit the power terminal on the corresponding heating tube.

6. An integrated automotive liquid heater according to claim 5, characterized in that: Each heating element is equipped with a temperature sensing element, and the terminal block is equipped with a temperature sensing element terminal for connecting the temperature sensing element terminals of the heating elements.

7. An integrated automotive liquid heater according to claim 6, characterized in that: The temperature sensing element terminal block includes two temperature sensing element terminal blocks 1 and one temperature sensing element terminal block 2, both of which are fixedly mounted on the lower housing. The temperature sensing element terminal block 2 has the same structure as the power supply terminal block, and its two abutting springs 1 are used to abut against and fit against the positive terminal of the temperature sensing element on the corresponding heating element. The temperature sensing element terminal block 1 has an L-shaped structure, with its top end penetrating through the lower and upper housings, and its bottom end is provided with abutting springs 2, which are used to abut against and fit against the negative terminal of the temperature sensing element on the corresponding heating element.

8. An integrated automotive liquid heater according to claim 1, characterized in that: It also includes a mounting base, which is a plate-shaped structure with two connection holes that are adapted to the outer diameter of the heating tube. The mounting base is fixedly sleeved on the heating tube of the liquid heating tube through the connection holes, and the mounting base is also provided with mounting holes.

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