Disc heater

Abstract

The utility model discloses a disc type heater which comprises a bottom plate, a side panel and an upper cover are fixedly arranged on the upper end face of the bottom plate, the side panel is used for heat exchange, the upper cover is fixedly arranged on the upper end face of the side panel, and an inlet used for liquid feeding is fixedly formed in the center of the upper end face of the upper cover. A plurality of reinforcing ribs are arranged, the reinforcing ribs are annularly and fixedly arranged on the upper end face of the bottom plate, and the reinforcing ribs arranged on the upper portion of the bottom plate have the effects of guiding flow and strengthening the structure. The fluid direction of the inlet section of the heat exchange cavity is consistent with the temperature gradient direction of the heating wall surface, the field synergy theory is met, the heat exchange of the part can be effectively enhanced, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle equipment, in particular to a disc heater. Background Art

[0002] The heater is an important component of the thermal management system of pure electric vehicles. Its function is to convert electrical energy into thermal energy and transfer it to the fluid medium. In winter, when the temperature inside the vehicle, such as the passenger compartment and battery pack, is low and affects the comfort and vehicle performance, the heater needs to be turned on to provide heat. Existing automotive heaters mostly use heating film technologies such as PTC or thick film. The heating film is attached to the outside of the metal container for heating. The fluid flows through the inside of the metal container and transfers heat through the metal wall, transferring the heat of the heating element to the fluid medium.

[0003] In existing vehicle heaters, the fluid generally flows along the wall surface, and the flow velocity direction is consistent with the tangent direction of the wall surface for heat transfer. This structure is not conducive to heat exchange, and generally requires fins, spoiler structures, etc. to enhance heat exchange. For example, the invention patent disclosed in the publication number: CN111194099A discloses a thick film heater with fins, which includes a substrate and a screen printing layer. The screen printing layer is arranged on one side of the substrate, and the other side of the substrate is provided with fins. Such a setting can quickly transfer the generated heat after the substrate is heated, and can effectively transfer the generated heat quickly and reduce the temperature of the thick film heater. The cross-section of the fin is wavy, which increases the contact area between the fin and the air and improves the heat dissipation efficiency; at the same time, the fin material is aluminum alloy, the substrate is stainless steel, and a solder composite layer is arranged between the fin and the substrate, so that the fin and the substrate can be welded together. At the same time, a welding process used by a thick film heater with fins is also disclosed, which can weld the fin and the substrate together to ensure that their connection relationship is firm.

[0004] Although the fins and spoiler structures in the above-mentioned equipment can enhance the heat exchange function, the direction of the fluid in the heat exchanger cavity is nearly perpendicular to the direction of the wall temperature gradient, which is contrary to the theory of field synergy that is conducive to heat exchange and is not the optimal structure for heat transfer. Secondly, in the prior art, the inlet and outlet directions are parallel and the choice is single, which may not be convenient for the arrangement of vehicle parts. Therefore, a disc heater is urgently needed to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to provide a disc heater to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a disc heater comprises a bottom plate, the upper end surface of which is fixedly provided with a side panel for heat exchange.

[0007] An upper cover, the upper cover is fixedly arranged on the upper end surface of the side panel, and an inlet for liquid inlet is fixedly arranged at the center of the upper end surface of the upper cover;

[0008] A plurality of reinforcing ribs are provided, and the reinforcing ribs are fixedly arranged on the upper end surface of the bottom plate in an annular shape. The reinforcing ribs arranged on the upper part of the bottom plate have the functions of guiding flow and strengthening the structure;

[0009] A heating unit, the heating unit is fixedly attached to the bottom end surface of the bottom plate, the disc heater has a structure, the heating unit is on the bottom plate, the inlet fluid flows vertically into the bottom plate and impacts the first heating film, which can improve the heat exchange efficiency;

[0010] An outlet is opened on a side of the side panel.

[0011] Preferably, the heating unit includes a first heating film, a second heating film is arranged on the side of the first heating film, and a third heating film is arranged on the side of the second heating film, a fourth heating film is arranged on the side of the third heating film, and a fifth heating film is arranged on the side of the fourth heating film. The heating unit is a membrane structure, and the material of the heating unit can be one of thick film, PI film, and PTC film.

[0012] Preferably, the inlet, upper cover, side panel, bottom plate and reinforcing ribs are all made of metal, and the above components can also be made of stainless steel or other common metals.

[0013] Preferably, the heating power density of the first heating film, the second heating film, the third heating film, the fourth heating film and the fifth heating film increases from the inside to the outside, and the heating unit is divided into 1-5 layers from the center of the circle to the outside of the circle, and the heating power density of each layer is different. For example, if the total power is 5000W, the heating power density of layers 1-5 is calculated according to the simulation to be 1.12W / mm2, 0.78W / mm2, 0.63W / mm2, 0.53W / mm2, and 0.38W / mm2, respectively. The closer to the center of the bottom plate, the greater the convection heat transfer coefficient, and the more heat that can be taken away.

[0014] Preferably, a guide groove is provided on the side end surface of the fifth heating film, and the outlet is arranged in the opposite direction to the guide groove. Since the fluid will converge toward the outlet on the bottom plate, there is less fluid away from the outlet side, and the heat exchange capacity is weak. Therefore, the arrangement of the heating unit away from the outlet side is also adjusted accordingly, so that the power density of this area is less than that of the area close to the outlet side.

[0015] Preferably, the inlet is coaxially opposite to the first heating film, which can improve heat exchange efficiency.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. The fluid direction of the inlet section of the heat exchange cavity of the utility model is consistent with the temperature gradient direction of the heating wall, which conforms to the field synergy theory, can effectively enhance the heat exchange of this part and improve the heat exchange efficiency.

[0018] 2. The directions of the inlet and outlet of the utility model are perpendicular to each other, which can provide more options for vehicle layout and improve the adaptability of subsequent vehicle layout.

[0019] 3. In the present invention, the kinetic energy of the inlet fluid directly acts on the first heating film, thereby enhancing heat exchange and improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a disassembled diagram of the main body of the utility model;

[0021] Figure 2 It is an assembly drawing of the main body of the utility model;

[0022] Figure 3 It is a front view of the main body of the utility model;

[0023] Figure 4 It is a cross-sectional view along the front view AA of the main body of the utility model;

[0024] Figure 5 This is a disassembled diagram of the heating unit of the utility model;

[0025] Figure 6 It is a schematic structural diagram of the heating unit of the utility model.

[0026] In the figure: 1-inlet, 2-upper cover, 3-side panel, 4-bottom plate, 5-heating unit, 6-reinforcement rib, 7-outlet, 51-first heating film, 52-second heating film, 53-third heating film, 54-fourth heating film, 55-fifth heating film. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-6 The utility model provides an embodiment: a disk heater comprises a bottom plate 4, and a side panel 3 for heat exchange is fixedly arranged on the upper end surface of the bottom plate 4.

[0029] An upper cover 2, which is fixedly arranged on the upper end surface of the side panel 3, and an inlet 1 for liquid inlet is fixedly arranged at the center of the upper end surface of the upper cover 2;

[0030] The reinforcing ribs 6 are provided with a plurality of reinforcing ribs 6, and the reinforcing ribs 6 are fixedly arranged on the upper end surface of the bottom plate 4 in an annular shape. The reinforcing ribs 6 arranged on the upper part of the bottom plate 4 have the functions of guiding flow and strengthening the structure;

[0031] The heating unit 5 is fixedly attached to the bottom end surface of the bottom plate 4, and has a disc heater structure. The heating unit 5 is on the bottom plate 4, and the inlet fluid flows vertically into the bottom plate 4 and impacts the first heating film 51, which can improve the heat exchange efficiency;

[0032] The outlet 7 is opened on the side of the side panel 3 .

[0033] like Figure 5 and Figure 6 As shown, the heating unit 5 includes a first heating film 51, a second heating film 52 is arranged on the side of the first heating film 51, and a third heating film 53 is arranged on the side of the second heating film 52, a fourth heating film 54 is arranged on the side of the third heating film 53, and a fifth heating film 55 is arranged on the side of the fourth heating film 54. The heating unit 5 is a membrane structure, and the material of the heating unit 5 can be one of thick film, PI film, and PTC film.

[0034] The inlet 1, the upper cover 2, the side panel 3, the bottom plate 4 and the reinforcing ribs 6 are all made of metal. The above components can also be made of stainless steel or other common metals.

[0035] The heating power densities of the first heating film 51, the second heating film 52, the third heating film 53, the fourth heating film 54 and the fifth heating film 55 increase from the inside to the outside. The heating unit 5 is divided into 1-5 layers from the center to the outside of the circle, and the heating power density of each layer is different. For example, if the total power is 5000W, the heating power densities of the 1-5 layers are calculated according to the simulation to be 1.12W / mm2, 0.78W / mm2, 0.63W / mm2, 0.53W / mm2, and 0.38W / mm2 respectively. The closer to the center of the bottom plate, the greater the convection heat transfer coefficient, and the more heat that can be taken away.

[0036] A guide groove is provided on the side end face of the fifth heating film 55, and the outlet 7 is arranged in the opposite direction to the guide groove. Since the fluid will converge toward the outlet 7 on the bottom plate 4, the fluid is less away from the outlet 7 and the heat exchange capacity is weak, the layout of the heating unit 5 away from the outlet 7 is also adjusted accordingly so that the power density of this area is smaller than that of the area close to the outlet 7.

[0037] The inlet 1 is coaxially opposite to the first heating film 51, which can improve the heat exchange efficiency.

[0038] Working principle: During operation, the fluid flows in from the inlet 1, vertically hits the first heating film 51 in the center of the heating unit 5, and spreads circumferentially. The reinforcing ribs 6 of the bottom plate 4 not only strengthen the deformation resistance of the bottom plate 4, but also act as a guide structure to guide the jet at the inlet 1 to spread evenly.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A disk heater, comprising a bottom plate (4), the upper end surface of the bottom plate (4) being fixedly provided with a side panel (3) for heat exchange, characterized in that: An upper cover (2), the upper cover (2) being fixedly arranged on the upper end surface of the side panel (3), and an inlet (1) for liquid inlet being fixedly arranged at the center of the upper end surface of the upper cover (2); Reinforcing ribs (6), a plurality of the reinforcing ribs (6) are provided, and the reinforcing ribs (6) are annularly fixedly provided on the upper end surface of the bottom plate (4); A heating unit (5), the heating unit (5) being fixedly attached to the bottom end surface of the bottom plate (4); An outlet (7), wherein the outlet (7) is opened on a side portion of the side panel (3).

2. The disk heater according to claim 1, characterized in that: The heating unit (5) comprises a first heating film (51), a second heating film (52) is arranged on the side of the first heating film (51), a third heating film (53) is arranged on the side of the second heating film (52), a fourth heating film (54) is arranged on the side of the third heating film (53), and a fifth heating film (55) is arranged on the side of the fourth heating film (54).

3. The disk heater according to claim 2, characterized in that: The inlet (1), upper cover (2), side panel (3), bottom plate (4) and reinforcing ribs (6) are all made of metal.

4. The disk heater according to claim 2, characterized in that: The heating power densities of the first heating film (51), the second heating film (52), the third heating film (53), the fourth heating film (54) and the fifth heating film (55) increase sequentially from the inside to the outside.

5. The disk heater according to claim 2, characterized in that: A guide groove is provided on the side end surface of the fifth heating film (55), and the outlet (7) is arranged in the opposite direction to the guide groove.

6. The disk heater according to claim 2, characterized in that: The inlet (1) is coaxially opposite to the first heating film (51).

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