High-voltage high-power multilayer heating device and electric heater

Abstract

The utility model relates to an electric heating device, in particular to a high-voltage high-power multilayer heating device and an electric heater. A high-voltage high-power multilayer heating device comprises a first electric heating plate; the second electric heating plate is arranged opposite to the first electric heating plate; and the middle guide plate is arranged between the first electric heating plate and the second electric heating plate, and a middle circuitous runner is arranged on the middle guide plate. According to the high-voltage and high-power multilayer heating device provided by the utility model, the electric heating plates are stacked in multiple layers to realize high-power heating, the voltage of a power supply can be directly used, a voltage reduction and stabilization module is not needed, rapid heating can be realized, and meanwhile, the volume is smaller, the structure is compact, and the cost is lower.

Description

Technical Field

[0001] This utility model relates to an electric heating device, and more particularly to a high-pressure, high-power, multi-layer heating device and electric heater. Background Technology

[0002] Existing automotive air conditioning heaters mostly use PTC heating, with a power typically ranging from 3-7kW and a voltage usually not exceeding 400V. However, with the improvement in electric vehicle performance, the voltage of electric vehicles has reached 500-800V. This means that the voltage of existing electric vehicles cannot be directly used with PTC heaters, requiring step-down and voltage regulation modules, increasing system complexity and cost. Direct high voltage requires ceramic substrates and high-voltage-resistant encapsulation materials, making the process even more complex and costly. Furthermore, to improve heating performance and achieve rapid heating, the heater power needs to be increased. However, due to the inherent limitations of PTC technology, high-power PTC heaters result in larger size and increased weight, making them unsuitable for electric vehicles. Utility Model Content

[0003] To solve the above problems, this utility model provides a high-pressure, high-power, multi-layer heating device, the specific technical solution of which is as follows:

[0004] A high-pressure, high-power, multi-layer heating device includes: a first electric heating plate; a second electric heating plate disposed opposite to the first electric heating plate; and an intermediate guide plate disposed between the first electric heating plate and the second electric heating plate, wherein the intermediate guide plate is provided with an intermediate meandering flow channel.

[0005] Preferably, the intermediate guide plate includes: a guide frame with an inlet confluence channel and an outlet confluence channel at both ends respectively communicating with the intermediate meandering flow channel; a guide liner disposed inside the guide frame; and a guide connecting rod disposed inside the guide frame and connected to the guide liner, so that the interior of the guide frame forms an intermediate meandering flow channel.

[0006] Preferably, the intermediate guide plate is further provided with a plurality of first connecting posts, and the first connecting posts are provided with first connecting holes.

[0007] Furthermore, the two ends of the first connecting column extend beyond the intermediate guide plate.

[0008] Preferably, the first electric heating plate and the second electric heating plate have the same structure, both including an electric heating substrate and an electric heating layer disposed on the electric heating substrate. The electric heating layer includes an encapsulation insulation layer, a heating resistance layer and a bottom insulation layer disposed sequentially from top to bottom, and a conductor layer disposed between the encapsulation insulation layer and the bottom insulation layer and connected to the heating resistance layer. The bottom insulation layer is disposed on the electric heating substrate.

[0009] A high-pressure, high-power electric heater includes: a high-pressure, high-power, multi-layer heating device; a heating base having a first heating cavity, a first meandering flow channel disposed within the first heating cavity, and an inlet and an outlet communicating with the first heating cavity and the first meandering flow channel, wherein the high-pressure, high-power, multi-layer heating device is disposed within the first heating cavity, and the first electric heating plate rests against the first meandering flow channel; a heating bottom plate disposed at the bottom of the first heating cavity, and having a second meandering flow channel, the second meandering flow channel resting against the second electric heating plate; a control plate disposed on the first heating base; and a cover plate disposed on the heating base and located above the control plate; wherein the intermediate meandering flow channel and the second meandering flow channel are both communicating with the inlet and the outlet.

[0010] Preferably, the intermediate detour channel is mirrored with the first detour channel and the second detour channel, respectively.

[0011] Preferably, it further includes: a temperature sensor disposed in the first heating cavity, and located in the middle and at both ends of the first heating cavity.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model provides a high-voltage, high-power, multi-layer heating device that uses multiple stacked electric heating plates to achieve high-power heating. It can directly use the voltage of the power supply without the need for voltage reduction and stabilization modules, and can achieve rapid heating. At the same time, it is small in size, compact in structure, and low in cost. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a high-power multi-layer heating device;

[0015] Figure 2 This is a side view of a high-power multi-layer heating device;

[0016] Figure 3 yes Figure 2 A magnified view of a section at point I;

[0017] Figure 4 It is a top view of a high-power multi-layer heating device, with the first electric heating plate hidden;

[0018] Figure 5 This is a top view of the center deflector;

[0019] Figure 6 This is a schematic diagram of the structure of the intermediate guide plate;

[0020] Figure 7 This is a schematic diagram of the structure of the first electric heating plate;

[0021] Figure 8 This is a schematic diagram of the structure of the second electric heating plate;

[0022] Figure 9 This is a schematic diagram of the structure of a high-voltage, high-power electric heater;

[0023] Figure 10 It is a three-dimensional cross-sectional view of a high-voltage, high-power electric heater;

[0024] Figure 11 This is a cross-sectional view of a high-voltage, high-power electric heater;

[0025] Figure 12 This is a three-dimensional view of the heating base from the first perspective;

[0026] Figure 13 This is a top view of the heating base;

[0027] Figure 14 This is a two-dimensional view of the heating base from a second perspective;

[0028] Figure 15 This is a 3D view of the heating base plate;

[0029] Figure 16 This is a top view of the heating base plate. Detailed Implementation

[0030] The present invention will now be further described with reference to the accompanying drawings.

[0031] like Figures 1 to 8 As shown, a high-power multi-layer heating device includes a first electric heating plate 5, a second electric heating plate 7 and an intermediate guide plate 6 arranged sequentially from top to bottom, with an intermediate meandering flow channel 61 provided on the intermediate guide plate 6.

[0032] The first electric heating plate 5 and the second electric heating plate 7 have the same structure, both including an electric heating substrate 55 and an electric heating layer disposed on the electric heating substrate 55. The electric heating layer includes an encapsulation insulation layer 51, a heating resistance layer 52 and a bottom insulation layer 54 disposed sequentially from top to bottom, and a conductor layer 53 disposed between the encapsulation insulation layer 51 and the bottom insulation layer 54 and connected to the heating resistance layer 52. The bottom insulation layer 54 is disposed on the electric heating substrate 55.

[0033] The encapsulating insulation layer 51 can be made of ceramic material and sintered at high temperature to protect the conductive circuit from scratches and impacts from foreign objects.

[0034] The heating resistance layer 52 is made of precious metal ruthenium and its oxides, sintered at high temperature, and is used for heating when electricity is applied. The heating resistance layer 52 can achieve high-power heating.

[0035] The conductor layer 53 is made of precious metals such as silver, palladium and platinum sintered at high temperature. It has low resistivity and does not generate heat. It is used to connect the heating resistor to provide external input solder joints.

[0036] The bottom insulating layer 54 is made of ceramic material sintered at high temperature, and is used as an insulating medium between the heating resistor and the electric heating substrate 55 to ensure basic insulation.

[0037] The electric heating substrate 55 is made of stainless steel plates such as SUS430, SUS444, and SUS445 and is used to carry thick film circuits.

[0038] The first electric heating plate 5 and the second electric heating plate 7 operate at a voltage range of 450-850V and have a power capacity of up to 20KW.

[0039] The performance of the first electric heating plate 5 is as follows:

[0040]

[0041] The performance of the second electric heating plate 7 is as follows:

[0042]

[0043] The heating resistance layer 52 does not require voltage reduction and stabilization, and its heating power changes synchronously with the voltage. Because it is a film structure, the overall size of the electric heater is small and the structure is compact.

[0044] The intermediate guide plate 6 includes a guide frame 62, a guide liner 63, and a guide connecting rod 64. The guide frame 62 has an inlet confluence channel 66 and an outlet confluence channel 67 at both ends, respectively, communicating with the intermediate meandering flow channel 61. Multiple guide liners 63 are located inside the guide frame 62 and are arranged in parallel, extending along the length of the intermediate guide plate 6. The guide connecting rod 64 is located inside the guide frame 62 and connected to the guide liner 63, forming the intermediate meandering flow channel 61 inside the guide frame 62. The thickness of the guide connecting rod 64 is less than the thickness of the guide frame 62 and the guide liner 63, allowing the internal liquid to flow normally.

[0045] To facilitate the fixing of the intermediate guide plate 6, the intermediate guide plate 6 is also provided with a number of first connecting posts 65. The first connecting posts 65 are provided with first connecting holes 66. Screws pass through the first electric heating plate 5, the first connecting holes 66 and the second electric heating plate 7 to fix the first electric heating plate 5, the second electric heating plate 7 and the intermediate guide plate 6.

[0046] The intermediate guide plate 6 is located between the first electric heating substrate of the first electric heating plate 5 and the second electric heating layer of the second electric heating plate 7. In order to improve the heat exchange efficiency and avoid the temperature between the first electric heating substrate and the second electric heating plate 7 from being too high, the two ends of the first connecting post 65 are higher than the intermediate guide plate 6. The first connecting post 65 makes the intermediate guide plate 6 form a gap between the first electric heating plate 5 and the second electric heating plate 7, so that the liquid can pass through quickly and quickly remove the heat between the first electric heating plate 5 and the second electric heating plate 7, avoiding heat focusing and causing the temperature to be too high, and improving the uniformity of the outlet water temperature.

[0047] like Figures 9 to 16 As shown, a high-pressure, high-power electric heater includes a high-power multi-layer heating device, a heating base 1, a heating bottom plate 2, a control plate 4, and a cover plate 3. The heating base 1 has a first heating cavity 10 at its bottom, with a first meandering flow channel 11 at the bottom. The heating base 1 has an inlet 12 and an outlet 13 at both ends, both communicating with the first heating cavity 10 and the first meandering flow channel 11. The heating bottom plate 2 has a second meandering flow channel 22, which is sealed and fixed to the top of the first heating cavity 10. The high-power multi-layer heating device is located inside the first heating cavity 10. A first electric heating plate 5 rests against the first meandering flow channel 11, and a second electric heating plate 7 rests against the second meandering flow channel 22. The control plate 4 is installed in a control groove 15 at the top of the heating base 1. The cover plate 3 is sealed and fixed to the heating base 1 and located on top of the control groove 15. The first electric heating plate 5 closes the top of the first detour channel 11, allowing liquid to flow within the first detour channel 11, and heats the liquid within the first detour channel 11. The second electric heating plate 7 closes the top of the second detour channel 22, allowing liquid to flow within the second detour channel 22, and heats the liquid within the second detour channel 22.

[0048] When the liquid enters from the inlet 12, the liquid is divided into three paths. The first path enters the first detour channel 11, the second path enters the middle detour channel 61 of the middle guide plate 6, and the third path enters the second detour channel 22. Liquid flows over both sides of the first electric heating plate 5 and the second electric heating plate 7, which can quickly remove heat.

[0049] To improve heat exchange efficiency and ensure uniform temperature, the intermediate detour channel 61 is mirrored with the first detour channel 11 and the second detour channel 22, meaning that the three detour channels have the same structure and the same path and direction of liquid flow inside.

[0050] To improve the accuracy of temperature control, a temperature sensor is also included. Three temperature sensors are installed inside the first heating chamber 10 and are located in the middle and at both ends of the first heating chamber 10, respectively. When the temperature sensors are located at both ends, they are located at the liquid inlet 12 and the liquid outlet 13, respectively.

[0051] The overall weight is less than 3KG, which is less than the existing 3.6KG weight of PTC-based devices.

[0052] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. A high-pressure, high-power, multi-layer heating device, characterized in that, include: First electric heating plate (5); The second electric heating plate (7) is disposed opposite to the first electric heating plate (5); as well as An intermediate guide plate (6) is disposed between the first electric heating plate (5) and the second electric heating plate (7), and an intermediate meandering flow channel (61) is provided on the intermediate guide plate (6).

2. The high-pressure, high-power, multi-layer heating device according to claim 1, characterized in that, The intermediate guide plate (6) includes: The guide frame (62) has an inlet confluence channel (66) and an outlet confluence channel (67) at both ends that are connected to the intermediate meandering channel (61); A flow guide liner (63) is disposed inside the flow guide frame (62); and A flow guide rod (64) is disposed inside the flow guide frame (62) and connected to the flow guide liner (63) so that an intermediate meandering flow channel (61) is formed inside the flow guide frame (62).

3. The high-pressure, high-power, multi-layer heating device according to claim 2, characterized in that, The intermediate guide plate (6) is also provided with a plurality of first connecting posts (65), and the first connecting posts (65) are provided with first connecting holes (66).

4. The high-pressure, high-power, multi-layer heating device according to claim 3, characterized in that, The two ends of the first connecting column (65) extend above the intermediate guide plate (6).

5. The high-pressure, high-power, multi-layer heating device according to claim 1, characterized in that, The first electric heating plate (5) and the second electric heating plate (7) have the same structure, both including an electric heating substrate (55) and an electric heating layer disposed on the electric heating substrate (55). The electric heating layer includes an encapsulation insulation layer (51), a heating resistance layer (52) and a bottom insulation layer (54) disposed sequentially from top to bottom, and a conductor layer (53) disposed between the encapsulation insulation layer (51) and the bottom insulation layer (54) and connected to the heating resistance layer (52). The bottom insulation layer (54) is disposed on the electric heating substrate (55).

6. A high-voltage, high-power electric heater, characterized in that, include: A high-pressure, high-power, multi-layer heating device as described in claim 1; The heating base (1) is provided with a first heating cavity (10), a first detour flow channel (11) provided in the first heating cavity (10), an inlet (12) and an outlet (13) communicating with the first heating cavity (10) and the first detour flow channel (11). The high-pressure, high-power multilayer heating device is provided in the first heating cavity (10), and the first electric heating plate (5) abuts against the first detour flow channel (11). A heating base plate (2) is provided at the bottom of the first heating cavity (10) and is provided with a second meandering flow channel (22), which abuts against the second electric heating plate (7); A control panel (4) is disposed on the first heating base (1); and The cover plate (3) is disposed on the heating base (1) and located above the control plate (4); The intermediate detour channel (61) and the second detour channel (22) are both connected to the inlet (12) and the outlet (13).

7. A high-voltage, high-power electric heater according to claim 6, characterized in that, The intermediate detour channel (61) is mirrored with the first detour channel (11) and the second detour channel (22).

8. A high-voltage, high-power electric heater according to claim 6, characterized in that, Also includes: Temperature sensors are located inside the first heating cavity (10), and are respectively located in the middle and at both ends of the first heating cavity (10).

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