Vehicle heating device

Abstract

The utility model provides a heating device for a vehicle, which comprises a shell provided with a heating cavity; the vehicle heating device further comprises a thick film heating plate, at least part of the thick film heating plate is arranged in the heating cavity, and the thick film heating plate is provided with a first heat contact face and a second heat contact face which are opposite. The first thermal contact surface and the second thermal contact surface are used for being in thermal contact with fluid flowing through the two sides of the thick film heating plate; the thick film heating plate comprises: a substrate having a first surface; the first resistive film is arranged on the first surface of the substrate and is insulated from the substrate; the first insulating heat-conducting layer is arranged on one side, far away from the substrate, of the first resistive film; the projection of the first resistive film on the substrate is a first projection, and the projection of the first insulating heat-conducting layer on the substrate is a second projection; the first projection falls on the second projection and deviates from the edge of the second projection. And the first thermal contact surface and the second thermal contact surface can be in contact with fluid, so that the heat dissipation efficiency of the thick film heating plate can be improved, and the increasing heat demand of the new energy automobile is increased.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicles, and specifically to a vehicle heating device. Background Art

[0002] Currently, existing heating systems for new energy vehicles typically utilize thick-film heating plates. These plates generate heat by applying electricity to a thin resistor film printed on a substrate. However, these traditional thick-film heating plates have low heating efficiency and are unable to meet the increasing heat demands of new energy vehicles. Summary of the Invention

[0003] Various embodiments in this specification provide a vehicle heating device that can improve heating efficiency.

[0004] A vehicle heating device comprises a housing having a heating chamber;

[0005] The vehicle heating device further includes:

[0006] a thick film heating plate, at least partially disposed within the heating chamber, the thick film heating plate having a first thermal contact surface and a second thermal contact surface opposite to each other; the first thermal contact surface and the second thermal contact surface being configured to be in thermal contact with a fluid flowing through both sides of the thick film heating plate;

[0007] Wherein, the thick film heating plate comprises:

[0008] a substrate having a first surface;

[0009] A first resistance film is provided on the first surface of the substrate and is insulated from the substrate; and

[0010] A first insulating thermally conductive layer is provided on a side of the first resistive film away from the substrate; a projection of the first resistive film on the substrate is a first projection, and a projection of the first insulating thermally conductive layer on the substrate is a second projection; the first projection falls on the second projection and deviates from an edge of the second projection.

[0011] In some feasible embodiments, the thick film heating plate divides the heating chamber into a first heating chamber and a second heating chamber;

[0012] The first heating chamber and the second heating chamber are both provided with a partitioning drainage plate; the first heating chamber is divided into a plurality of first drainage channels connected in series by the partitioning drainage plate; the second heating chamber is divided into a plurality of second drainage channels connected in series by the partitioning drainage plate.

[0013] In some feasible embodiments, the heating chamber has an inlet and an outlet; the inlet, the plurality of first drainage channels, the plurality of second drainage channels and the outlet are sequentially connected in series.

[0014] In some feasible embodiments, the heating chamber has an inlet and an outlet; the thick film heating plate divides the heating chamber into a first heating chamber and a second heating chamber; the first heating chamber and the second heating chamber are both connected to the inlet and the outlet, and the fluid entering from the inlet is diverted to the first heating chamber and the second heating chamber through the thick film heating plate, and is discharged at the outlet.

[0015] In some feasible embodiments, each of the first drainage channels is communicated with at least one of the second drainage channels; and each of the second drainage channels is communicated with at least one of the first drainage channels.

[0016] In some feasible embodiments, the housing includes:

[0017] a main body having a main body cavity with one end open;

[0018] A sealing assembly is used to seal the opening of the main body cavity; the sealing assembly and the main body enclose the heating cavity.

[0019] In some feasible embodiments, the sealing assembly includes:

[0020] A bracket is sealed and connected to the side wall of the opening of the main cavity; the bracket is provided with a perforation; the thick film heating plate includes a heating area and a lead area provided at one end of the heating area; the shape of the perforation matches the thick film heating plate so that the end of the lead area close to the heating area is placed in the perforation and sealed and connected to the side wall of the perforation.

[0021] In some feasible embodiments, a sealing groove is provided on a surface of the bracket away from the heating chamber, and the through hole is provided on a bottom wall of the sealing groove;

[0022] The sealing assembly further comprises:

[0023] a sealing ring disposed between the bracket and a side wall of the opening of the main cavity; and

[0024] A sealing filler is used to achieve a sealed connection between the side wall of the perforation and the thick film heating plate; the sealing filler includes a sealant; the sealant is at least partially disposed in the sealing groove and covers the gap between the perforation and the thick film heating plate.

[0025] In some feasible embodiments, the inner side wall of the heating chamber is provided with a slot matching the side wall edge of the thick film heating plate.

[0026] In some feasible embodiments, the substrate has a second surface disposed opposite to the first surface; and the thick film heating plate further comprises:

[0027] a second resistance film, disposed on the second surface of the substrate and insulated from the substrate;

[0028] The second insulating thermally conductive layer is arranged on a side of the second resistive film away from the substrate; the projection of the second resistive film on the substrate is a third projection, and the projection of the second insulating thermally conductive layer on the substrate is a fourth projection; the third projection falls on the fourth projection and deviates from the edge of the fourth projection.

[0029] In various embodiments provided herein, the provision of a first insulating thermally conductive layer allows the side of the thick-film heating plate provided with the first resistive film to contact the fluid for heat dissipation. Consequently, both the first thermal contact surface and the second thermal contact surface can be in contact with the fluid. Therefore, without increasing the size of the resistive film, or even the size of the thick-film heating plate, the heat dissipation efficiency of the thick-film heating plate can be improved, thereby meeting the increasing heat demands of new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the exploded structure of a vehicle heating device provided in one embodiment of this specification.

[0031] Figure 2 for Figure 1 A side view of the vehicle heating device is shown.

[0032] Figure 3 for Figure 2 Cross-sectional view of the vehicle heating device along the AA direction.

[0033] Figure 4 for Figure 2 Cross-sectional view of the heating device for the vehicle along the BB direction.

[0034] Figure 5 for Figure 2 Heating device for medium and small vehicles Figure 4 Cross-sectional view in CC direction is shown.

[0035] Figure 6 for Figure 2 Heating device for medium-speed train Figure 4 The cross-sectional view in the DD direction is shown.

[0036] Figure 7 for Figure 1 Schematic diagram of the structure of the main body.

[0037] Figure 8 for Figure 1 Schematic diagram of the structure of the main body

[0038] Figure 9 for Figure 1 Schematic diagram of the exploded structure of a medium-thick film heating plate.

[0039] Figure 10 A cross-sectional view of a housing provided in accordance with another embodiment of the present application.

[0040] Figure 11 for Figure 10 A cross-sectional view of another cross-sectional position of the housing is shown.

[0041] Description of Reference Numerals

[0042] 100, vehicle heating device; 110, housing; 111, heating chamber; 111a, first heating chamber; 111b, second heating chamber; 111c, inlet; 111d, outlet; 111e, slot; 112, partitioning plate; 113, first drainage channel; 114, second drainage channel; 115, main body; 115a, main body cavity; 116, sealing assembly; 116a, bracket; 116b, perforation; 116c, sealing assembly Sealing ring; 116d, sealing filler; 116e, sealing groove; 116f, annular groove; 120, thick film heating plate; 121, first thermal contact surface; 122, second thermal contact surface; 123, substrate; 123a, first surface; 124, first resistive film; 125, first insulating thermally conductive layer; 126, heating area; 127, lead area; 128, first insulating thermally conductive film; 128a, electrode; 129, second insulating thermally conductive film. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0044] In the present application description, the drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features.

[0045] Unless otherwise indicated, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the technical field of this specification. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the scope of this specification. The term "and / or" used in this specification includes any and all combinations of one or more related listed items. The singular forms "a", "above", and "the" used in the embodiments of this specification and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0046] In the description of this application specification, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of simplified description of the present application, and do not indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation to the present application.

[0048] Throughout this specification, unless otherwise expressly defined, the terms "installed," "connected," "connect," "fixed," and "disposed" should be interpreted broadly. For example, "connection" can refer to fixed or removable connections, or integration; it can refer to mechanical or electrical connections; it can refer to direct connections or indirect connections through an intermediary; it can also refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this specification based on the specific circumstances.

[0049] In the description of this application, unless otherwise explicitly defined, a first feature being “on,” “above,” “above,” “above,” “below,” “below,” or “below” a second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Moreover, a first feature being “on,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0050] See also Figures 1 to 9 An embodiment of the present application provides a vehicle heating device 100, comprising a housing 110 and a thick film heating plate 120. The housing 110 has a heating chamber 111. The thick film heating plate 120 is partially disposed within the heating chamber 111 and has a first thermal contact surface 121 and a second thermal contact surface 122 opposite to each other. The first thermal contact surface 121 and the second thermal contact surface 122 are configured to thermally contact a fluid flowing through both sides of the thick film heating plate 120.

[0051] Specifically, the thick film heating plate 120 includes a substrate 123 , a first resistive film 124 and a first insulating heat-conducting layer 125 .

[0052] The substrate 123 has a first surface 123a. A first resistive film 124 is disposed on the first surface 123a of the substrate 123 and is insulated from the substrate 123. A first insulating and thermally conductive layer 125 is disposed on a side of the first resistive film 124 away from the substrate 123, that is, the first resistive film 124 is disposed between the first insulating and thermally conductive layer 125 and the substrate 123. The projection of the first resistive film 124 on the substrate 123 is a first projection, and the projection of the first insulating and thermally conductive layer 125 on the substrate 123 is a second projection. The first projection falls on the second projection and deviates from the edge of the second projection. Thus, the first insulating and thermally conductive layer 125 effectively isolates the first resistive film 124 from the external environment, protecting the first resistive film 124 from damage by external factors.

[0053] The vehicle heating device 100, through the provision of the first insulating thermally conductive layer 125, allows the side of the thick-film heating plate 120, where the first resistive film 124 is located, to contact the fluid, dissipating heat. Consequently, both the first thermal contact surface 121 and the second thermal contact surface 122 can contact the fluid. Therefore, without increasing the size of the resistive film, or in other words, without increasing the size of the thick-film heating plate 120, the heat dissipation efficiency of the thick-film heating plate 120 can be improved, thereby meeting the increasing heat demands of new energy vehicles.

[0054] In addition, it can be understood that when the same heat dissipation efficiency is required, the thick film heating plate 120 in the vehicle heating device 100 is smaller in size than the traditional vehicle heating device 100, so that the heating device is smaller in size and lighter in weight, meeting the miniaturization and lightweight requirements of the vehicle heating device 100.

[0055] Furthermore, both sides of the thick film heating plate 120, namely the first thermal contact surface 121 and the second thermal contact surface 122, can be in thermal contact with the fluid. Therefore, the heat emitted by the first thermal contact surface 121 and the second thermal contact surface 122 can be transferred to the fluid, avoiding heat waste.

[0056] Furthermore, the first insulating and thermally conductive layer 125 can effectively isolate the first resistive film 124 from the external environment, protecting the first resistive film 124 from damage by external factors. This improves the service life of the thick-film heating plate 120. Based on this, when setting up the mounting structure for the thick-film heating plate 120 on the housing 110, there is no need to seal and isolate the space on both sides of the thick-film heating plate 120, reducing the requirements for the fixed installation of the thick-film heating plate 120. This makes the thick-film heating plate 120 easy to disassemble and replace, thereby simplifying the maintenance process and reducing maintenance costs.

[0057] In this embodiment, the thick film heating plate 120 divides the heating chamber 111 into a first heating chamber 111a and a second heating chamber 111b. The first heating chamber 111a and the second heating chamber 111b are both provided with a partitioning and draining plate 112. The first heating chamber 111a is divided into a plurality of first drainage channels 113 connected in series by the partitioning and draining plate 112; the second heating chamber 111b is divided into a plurality of second drainage channels 114 connected in series by the partitioning and draining plate 112. Therefore, the fluid flowing into the first heating chamber 111a flows through the plurality of first drainage channels 113 in sequence, see Figure 3 The fluid flowing into the second heating chamber 111b flows sequentially through a plurality of second drainage channels 114, see Figure 4 ; Thus, the flow path of the fluid in the heating chamber 111 is lengthened, so that the fluid is in full thermal contact with the thick film heating plate 120, thereby improving the heating effect of the fluid. It should be noted that, Figure 3and Figure 4 The direction indicated by the arrow is the flow direction of the fluid.

[0058] Furthermore, the partitioning and guiding plates 112 also have a guiding function. Under the guiding function of the partitioning and guiding plates 112 , the fluid can flow substantially along a preset direction, thereby avoiding the phenomenon of fluid flow disorder in the heating chamber 111 .

[0059] In this embodiment, the heating chamber 111 has an inlet 111c and an outlet 111d; the inlet 111c, the plurality of first drainage channels 113, the plurality of second drainage channels 114, and the outlet 111d are sequentially connected in series. Therefore, the fluid flowing into the heating chamber 111 from the inlet 111c first flows through the plurality of first drainage channels 113 connected in series, then flows through the plurality of second drainage channels 114 connected in series, and finally flows out from the outlet 111d. Figure 3 and Figure 4 Therefore, the flow path of the fluid in the heating chamber 111 is further lengthened, further improving the heating effect of the fluid.

[0060] In this embodiment, the housing 110 includes a main body 115 and a sealing assembly 116. The main body 115 has a main cavity 115a with an open end; the sealing assembly 116 is used to seal the opening of the main cavity 115a; the sealing assembly 116 and the main body 115 enclose the heating cavity 111.

[0061] Specifically, in this embodiment, the sealing assembly 116 includes a bracket 116a. The bracket 116a is sealed to the side wall of the opening of the main body cavity 115a; a perforation 116b is provided on the bracket 116a, and the thick film heating plate 120 includes a heating area 126 and a lead area 127 provided at one end of the heating area 126; the shape of the perforation 116b matches the thick film heating plate 120, so that the end of the lead area 127 close to the heating area 126 is placed in the perforation 116b and is sealed to the side wall of the perforation 116b. It can be understood that the heating area 126 of the thick film heating plate 120 is located in the heating cavity 111 surrounded by the sealing assembly 116 and the main body 115. The end of the lead area 127 away from the heating area 126 is located outside the heating cavity 111, so that the leads on the lead area 127 can be connected to a power source.

[0062] More specifically, in this embodiment, the through-hole 116b allows the heating area 126 of the thick-film heating plate 120 to pass through, and the end of the lead area 127 that is closest to the heating area 126 can be placed within the through-hole 116b. It is understood that in this case, the process of partially passing the thick-film heating plate 120 through the through-hole 116b can be performed before the sealing assembly 116 is sealed and connected to the side wall of the opening of the main cavity 115a, or after the sealing assembly 116 is sealed and connected to the side wall of the opening of the main cavity 115a.

[0063] It is understood that in other feasible embodiments, the method of placing the end of the lead area near the heating area within the perforation is not limited to this. For example, the bracket includes two bracket halves, and the two bracket halves surround the perforation; thus, the two bracket halves can be placed on either side of the thick film heating plate and then sealed together, so that the end of the lead area near the heating area is placed within the perforation. For another example, the perforation can allow the lead area of ​​the thick film heating plate to pass through, and the end of the lead area near the heating area can be placed within the perforation.

[0064] In this embodiment, the sealing assembly 116 further includes a sealing ring 116c, which is disposed between the bracket 116a and the sidewall of the opening of the main cavity 115a to achieve a sealed connection between the bracket 116a and the sidewall of the opening of the main cavity 115a. Specifically, in this embodiment, the bracket 116a is provided with an annular groove 116f, which matches the sidewall of the opening of the main cavity 115a so that the sidewall of the opening of the main cavity 115a can be inserted into the annular groove 116f. The sealing ring 116c is disposed between the end of the sidewall of the opening of the main cavity 115a and the bottom wall of the annular groove 116f.

[0065] In this embodiment, a sealing groove 116e is provided on the surface of the bracket 116a away from the heating chamber 111, and the perforation 116b is provided on the bottom wall of the sealing groove 116e. The sealing assembly 116 also includes a sealing filler 116d. The sealing filler 116d is used to achieve a sealed connection between the side wall of the perforation 116b and the thick film heating plate 120. Specifically, the sealing filler 116d includes a sealant; the sealant is at least partially provided in the sealing groove 116e and covers the gap between the perforation 116b and the thick film heating plate 120, thereby blocking the gap between the perforation 116b and the thick film heating plate 120, and achieving a sealed connection between the end of the lead area 127 close to the heating area 126 and the side wall of the perforation 116b.

[0066] In this embodiment, the inner sidewall of the heating chamber 111 is provided with a slot 111e that matches the sidewall edge of the thick film heating plate 120. Therefore, when the thick film heating plate 120 is fixed in the heating chamber 111, the sidewall of the thick film heating plate 120 can be inserted into the slot 111e.

[0067] Specifically, in this embodiment, two slots 111e are provided on the inner wall of the heating chamber 111, which respectively match the side wall edges on both sides of the thick film heating plate 120, so that the thick film heating plate 120 can be more stably fixed in the heating chamber 111.

[0068] Furthermore, the thick film heating plate 120 is fixed by the slot 111e without changing the structure of the thick film heating plate 120. Furthermore, the thick film heating plate 120 is fixed by the slot 111e, which has a simple structure and is easy to operate.

[0069] It is understandable that, in other feasible embodiments, the thick film heating plate is not limited to being fixed by a slot, but may also be fixedly connected by a snap connection, a pin connection, or the like.

[0070] It is understood that in other feasible embodiments, the method of forming the heating chamber is not limited to this. For example, in one feasible embodiment, the housing includes two half-shells, each of which has a recessed area. The two half-shells are butted together, and the recessed areas of the two half-shells are butted together to form the heating chamber.

[0071] Specifically, in this embodiment, in the thick-film heating plate 120, the substrate 123 is a metal plate, and a first insulating thermally conductive film 128 is disposed between the substrate 123 and the first resistive film 124. This prevents short circuits in the first resistive film 124. It will be appreciated that the first insulating thermally conductive film 128 also has a thermal conductivity effect, thereby better transferring heat emitted by the first resistive film 124 to the substrate 123.

[0072] In addition, in this embodiment, the thick film heating plate 120 further includes an electrode 128 a disposed between the first insulating thermally conductive film 128 and the first resistive film 124 , for achieving electrical connection between the first resistive film 124 and a power source.

[0073] In addition, in this embodiment, the thick film heating plate 120 further includes a second insulating thermally conductive film 129 disposed between the first insulating thermally conductive layer 125 and the first resistive film 124. The second insulating thermally conductive film 129 covers the first resistive film 124, thereby further preventing the risk of short circuiting of the first resistive film 124.

[0074] Optionally, the first insulating and heat-conducting layer 125 is a polymer layer, a ceramic layer or a glass layer. Further optionally, the first insulating and heat-conducting layer 125 is formed by coating.

[0075] It is understandable that in other feasible embodiments, the structure of the thick film heating plate is not limited to this. For example, in another feasible embodiment, the substrate has a second surface arranged opposite to the first surface; the thick film heating plate also includes a second resistance film and a second insulating heat-conducting layer. The second resistance film is arranged on the second surface of the substrate and is insulated from the substrate; the second insulating heat-conducting layer is arranged on the side of the second resistance film away from the substrate, that is, the second resistance film is arranged between the second insulating heat-conducting layer and the substrate; the projection of the second resistance film on the substrate is the third projection, and the projection of the second insulating heat-conducting layer on the substrate is the fourth projection; the third projection falls on the fourth projection and deviates from the edge of the fourth projection. Thus, the first thermal contact surface and the second thermal contact surface on both sides of the thick film heating plate can generate heat, thereby improving the heating efficiency of the thick film heating plate, and then improving the heat dissipation efficiency of the thick film heating plate, and increasing the demand for increasing heat in new energy vehicles.

[0076] Furthermore, under the condition that the heat demand is the same, a resistive film is provided on both the first surface and the second surface of the substrate, which can reduce the size of the resistive film on each thermal contact surface, so that the thick film heating plate can have a smaller volume and lighter weight, meeting the miniaturization and lightweight requirements of the vehicle heating device.

[0077] Furthermore, a resistive film is provided on both the first thermal contact surface and the second thermal contact surface, which can improve the consistency of the heat dissipation effect on both sides of the thick film heating plate corresponding to the first thermal contact surface and the second thermal contact surface, thereby improving the consistency of the temperature of the fluid after being heated on both sides of the thick film heating plate.

[0078] See also Figure 10 and Figure 11 The housing 110 of a vehicle heating device provided in another embodiment of this application specification differs from the housing 110 of the vehicle heating device 100 in that the heating chamber 111 has an inlet 111c and an outlet 111d; the thick-film heating plate 120 divides the heating chamber 111 into a first heating chamber 111a and a second heating chamber 111b; the first heating chamber 111a and the second heating chamber 111b are both connected to the inlet 111c and the outlet 111d. Fluid entering through the inlet 111c is divided into the first heating chamber 111a and the second heating chamber 111b by the thick-film heating plate 120 and then converges and is discharged at the outlet 111d. In other words, the first heating chamber 111a and the second heating chamber 111b are arranged in parallel, thereby reducing the path through which the fluid flows within the heating chamber 111 and increasing the fluid flow rate.

[0079] In this embodiment, each of the first drainage channels 113 is connected to at least one of the second drainage channels 114, and each of the second drainage channels 114 is connected to at least one of the first drainage channels 113. Thus, at the location where the first and second drainage channels 113 and 114 are connected, the fluids flowing therefrom, respectively, come into contact and exchange heat, thereby bringing the temperatures of the fluids flowing through the first and second drainage channels 113 and 114 closer together.

[0080] Furthermore, each of the first drainage channels 113 is connected to at least one of the second drainage channels 114; each of the second drainage channels 114 is connected to at least one of the first drainage channels 113, so that the pressure of the fluid in the first drainage channel 113 and the second drainage channel 114 can be basically consistent, so that the flow speed can also be basically consistent, and thus the heating effect of the fluid in the first drainage channel 113 and the second drainage channel 114 can be basically consistent.

[0081] It is understandable that Figure 10 and Figure 11 In the figure, the direction indicated by the arrow is the flow direction of the fluid. Figure 10 In FIG, the dotted line represents the direction of fluid flow in the second heating chamber 111 b.

[0082] It can be understood that in the various embodiments in this specification, the size of the serial number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this specification.

[0083] It can be understood that the various embodiments described in this specification can be implemented individually or in combination, and the embodiments of this specification are not limited to this.

[0084] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0085] The above description is merely a specific embodiment of this specification, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this specification should be included within the scope of protection of this specification. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A vehicle heating device, comprising a housing having a heating chamber; It is characterized by: The vehicle heating device further includes: a thick film heating plate, at least partially disposed within the heating chamber, the thick film heating plate having a first thermal contact surface and a second thermal contact surface opposite to each other; the first thermal contact surface and the second thermal contact surface being configured to be in thermal contact with a fluid flowing through both sides of the thick film heating plate; Wherein, the thick film heating plate comprises: a substrate having a first surface; A first resistance film is provided on the first surface of the substrate and is insulated from the substrate; and A first insulating thermally conductive layer is provided on a side of the first resistive film away from the substrate; a projection of the first resistive film on the substrate is a first projection, and a projection of the first insulating thermally conductive layer on the substrate is a second projection; the first projection falls on the second projection and deviates from an edge of the second projection.

2. The vehicle heating device according to claim 1, characterized in that: The thick film heating plate divides the heating chamber into a first heating chamber and a second heating chamber; The first heating chamber and the second heating chamber are both provided with a partitioning drainage plate; the first heating chamber is divided into a plurality of first drainage channels connected in series by the partitioning drainage plate; the second heating chamber is divided into a plurality of second drainage channels connected in series by the partitioning drainage plate.

3. The vehicle heating device according to claim 2, characterized in that: The heating chamber has an inlet and an outlet; the inlet, the plurality of first drainage channels, the plurality of second drainage channels and the outlet are sequentially connected in series.

4. The vehicle heating device according to claim 2, characterized in that: The heating chamber has an inlet and an outlet; the thick film heating plate divides the heating chamber into a first heating chamber and a second heating chamber; the first heating chamber and the second heating chamber are both connected to the inlet and the outlet, and the fluid entering from the inlet is divided into the first heating chamber and the second heating chamber through the thick film heating plate and converges and is discharged at the outlet.

5. The vehicle heating device according to claim 4, characterized in that: Each of the first drainage channels is communicated with at least one of the second drainage channels; and each of the second drainage channels is communicated with at least one of the first drainage channels.

6. The vehicle heating device according to any one of claims 1 to 5, characterized in that: The housing comprises: a main body having a main body cavity with one end open; and A sealing assembly is used to seal the opening of the main body cavity; the sealing assembly and the main body enclose the heating cavity.

7. The vehicle heating device according to claim 6, characterized in that: The sealing assembly comprises: A bracket, the bracket being sealed to the side wall of the opening of the main body cavity; the bracket being provided with a perforation; The thick film heating plate includes a heating area and a lead area provided at one end of the heating area; the shape of the through hole matches the thick film heating plate so that the end of the lead area close to the heating area is placed in the through hole and sealed with the side wall of the through hole.

8. The vehicle heating device according to claim 7, characterized in that: A sealing groove is provided on the surface of the bracket away from the heating chamber, and the through hole is provided on the bottom wall of the sealing groove; The sealing assembly further comprises: a sealing ring disposed between the bracket and a side wall of the opening of the main cavity; and A sealing filler is used to achieve a sealed connection between the side wall of the perforation and the thick film heating plate; the sealing filler includes a sealant; the sealant is at least partially disposed in the sealing groove and covers the gap between the perforation and the thick film heating plate.

9. The vehicle heating device according to any one of claims 1 to 5, characterized in that: The inner side wall of the heating chamber is provided with a slot matching the side wall edge of the thick film heating plate.

10. The vehicle heating device according to any one of claims 1 to 5, characterized in that: The substrate has a second surface disposed opposite to the first surface; the thick film heating plate further comprises: a second resistance film, disposed on the second surface of the substrate and insulated from the substrate; The second insulating thermally conductive layer is arranged on a side of the second resistive film away from the substrate; the projection of the second resistive film on the substrate is a third projection, and the projection of the second insulating thermally conductive layer on the substrate is a fourth projection; the third projection falls on the fourth projection and deviates from the edge of the fourth projection.

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