PTC heating assembly and electric heating device

Abstract

The invention discloses a PTC heating assembly, and the assembly comprises a plurality of PTC heating elements, a first electric connection part of each PTC heating element faces a first side direction which is perpendicular to the extension direction of a flat plate, and a second electric connection part of each PTC heating element faces a second side direction which is perpendicular to the extension direction of the flat plate. The first electrode plate is electrically connected with the first electric connecting part of each PTC heating element in the first side direction and leads out a first pin, the second electrode plate is electrically connected with the second electric connecting part of each PTC heating element in the second side direction and leads out a second pin, and the plurality of PTC heating elements are connected in series or in parallel through the first electrode plate and the second electrode plate; and the first covering part and the second covering part respectively cover the PTC heating element, the first electrode plate and the second electrode plate in the first side direction and the second side direction and perform insulation protection. According to the technical scheme, the two sides of the PTC heating assembly have the good heat dissipation effect, and the situation of continuous high temperature caused by heat accumulation is avoided.

Description

Technical Field

[0001] The present application relates to the field of PTC heating, and more specifically, to a PTC heating component and an electric heating device including the PTC heating component. Background Art

[0002] PTC (Positive Temperature Coefficient) thermistors have been widely used in various working conditions that require heating, but traditional PTC heating devices have many problems such as easy local overheating, low heat transfer efficiency, difficult assembly or low assembly efficiency.

[0003] Therefore, how to propose a new PTC heating solution that can solve at least one or more technical defects to at least a certain extent has become a technical problem that needs to be solved in the field. Summary of the invention

[0004] In view of this, the present application proposes a new PTC heating solution.

[0005] In a first aspect, according to the present application, a PTC heating component is provided, wherein the PTC heating component is in the shape of a plate having a first side and a second side facing away from the first side, and comprises:

[0006] A plurality of PTC heating elements, the plurality of PTC heating elements are arranged adjacent to each other in the extension direction of the plate, a first electrical connection portion of each PTC heating element faces a first side direction perpendicular to the extension direction of the plate, and a second electrical connection portion of each PTC heating element faces a second side direction perpendicular to the extension direction of the plate;

[0007] a first electrode sheet and a second electrode sheet, the first electrode sheet being electrically connected to the first electrical connection portion of each of the PTC heating elements in the first side direction and having a first lead extending therefrom, the second electrode sheet being electrically connected to the second electrical connection portion of each of the PTC heating elements in the second side direction and having a second lead extending therefrom, the plurality of PTC heating elements being connected in series or in parallel with each other through the first electrode sheet and the second electrode sheet; and

[0008] A first cover and a second cover respectively cover and insulate the PTC heating element and the first electrode sheet and the second electrode sheet in the first lateral direction and the second lateral direction.

[0009] Preferably,

[0010] Each PTC heating element has the same shape and size; and / or

[0011] Each PTC heating element is in the shape of a cuboid, a cube or a cylinder; and / or

[0012] There is or is no gap between adjacent PTC heating elements; and / or

[0013] There is no connection between the multiple PTC heating elements; and / or

[0014] The plurality of PTC heating elements are connected to each other; and / or

[0015] The multiple PTC heating elements are all positioned and arranged in the same frame.

[0016] Preferably, the electrical connection between the first electrode sheet and the first electrical connection portion of each of the PTC heating elements, and / or the electrical connection between the second electrode sheet and the second electrical connection portion of each of the PTC heating elements is achieved by at least one of the following methods:

[0017] This is achieved by direct contact using the pressing force between each other;

[0018] This is achieved by welding;

[0019] This is achieved by bonding contact through a conductive medium.

[0020] Preferably, the first electrode sheet and / or the second electrode sheet is a single conductive element or an assembly consisting of multiple conductive elements.

[0021] Preferably,

[0022] The first electrode sheet is integrally arranged on the inner side of the first cover member facing the PTC heating element; and / or

[0023] The second electrode sheet is integrally arranged on the inner side of the second cover member facing the PTC heating element.

[0024] Preferably, the material of the first electrode sheet and / or the second electrode sheet is tin, copper, silver, gold or alloys thereof.

[0025] Preferably, a gap or an insulating spacing structure is provided between the first electrode sheet and the second electrode sheet, and the insulating spacing structure is a separate insulating member or is integrated on the surface of the first electrode sheet and / or the second electrode sheet facing each other.

[0026] Further preferably, the integrated setting method includes one of spraying, laser cladding, deposition, 3D printing or sintering.

[0027] Preferably, the first pin and the second pin point in the same direction or in opposite directions;

[0028] The first pin and the second pin include at least one conductive track.

[0029] In a second aspect, according to the present application, an electric heating device is also proposed, the electric heating device comprising:

[0030] a first heat exchanger comprising a first heat exchange chamber having a first inlet and a first outlet; and

[0031] a second heat exchanger comprising a second heat exchange chamber having a second inlet and a second outlet; and

[0032] At least one flat-plate-shaped PTC heating component is clamped between the first heat exchange cavity of the first heat exchanger and the second heat exchange cavity of the second heat exchanger, and the PTC heating component is the PTC heating component according to any one of claims 1-9.

[0033] Preferably, if the electric heating device includes a plurality of the PTC heating components, then:

[0034] Each of the PTC heating components shares a first cover and each of the PTC heating components includes a second cover that is independent of the other; or

[0035] The PTC heating components share a second cover and the PTC heating components include their own independent first cover; or

[0036] The PTC heating components share a first cover and a second cover; or

[0037] Each of the PTC heating components comprises a first independent cover and a second independent cover.

[0038] In a third aspect, according to the present application, a second electric heating device is also proposed, the electric heating device comprising:

[0039] a first heat exchanger comprising a first heat exchange chamber having an inlet; and

[0040] a second heat exchanger, the second heat exchanger comprising a second heat exchange chamber having an outlet, the second heat exchange chamber being in fluid communication with the first heat exchange chamber such that the inlet is in fluid communication with the outlet; and

[0041] At least one flat-plate-shaped PTC heating component is clamped between the first heat exchange cavity of the first heat exchanger and the second heat exchange cavity of the second heat exchanger, and the PTC heating component is the PTC heating component according to any one of claims 1-9.

[0042] Preferably,

[0043] The first heat exchange chamber has a first shell facing the PTC heating component, and the first shell includes the first cover; and / or

[0044] The second heat exchange chamber has a second shell facing the PTC heating component, and the second shell includes the second covering member.

[0045] More preferably,

[0046] The first shell is made of metal material and has a first mounting surface facing the PTC heating component, the first mounting surface is provided with a first cover for achieving electrical insulation between the PTC heating component and the first shell, and the first cover is integrated with the first electrode sheet for electrical connection with the PTC heating element; and / or

[0047] The second shell is made of metal material and has a second mounting surface facing the PTC heating component. The second mounting surface is provided with a second cover for achieving electrical insulation between the PTC heating component and the second shell. The second cover is integrated with the second electrode sheet for electrical connection with the PTC heating element.

[0048] Further preferably, the first covering member is integrated on the first mounting surface by deposition or sintering; and / or the second covering member is integrated on the second mounting surface by deposition or sintering.

[0049] Further preferably, the material of the first covering member and / or the second covering member is aluminum oxide ceramic or a polymer containing ceramic particles.

[0050] Preferably, if the electric heating device includes a plurality of the PTC heating components, then:

[0051] Each of the PTC heating components shares a first cover and each of the PTC heating components includes a second cover that is independent of the other; or

[0052] The PTC heating components share a second cover and the PTC heating components include their own independent first cover; or

[0053] The PTC heating components share a first cover and a second cover; or

[0054] Each of the PTC heating components comprises a first independent cover and a second independent cover.

[0055] According to the technical solution of the present application, the PTC heating component is in the shape of a flat plate having a first side and a second side facing away from the first side. With multiple PTC heating elements as the center, the first electrode sheet and the first cover are arranged in the first side, and the second electrode sheet and the second cover are arranged in the second side, so that the PTC heating component as a whole constitutes a flat "sandwich" structure with insulating layers and conductive layers on both sides "sandwiching" the heating layer from the outside to the inside. While not affecting the electrical connection between the conductive layer and the heating layer, the insulation of the conductive layer and other external components is achieved, the interface thermal resistance is reduced, and the two sides of the heating layer have a good heat dissipation effect, avoiding the situation where the heating layer is continuously high temperature due to heat accumulation. And by using the PTC heating component with good heat dissipation effect on both sides, two heat exchangers are arranged on both sides to "sandwich" the PTC heating component in the middle, so that both sides of the electric heating device can also have a heat dissipation effect.

[0056] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present application, and the schematic implementation modes and descriptions of the present application are used to explain the present application. In the accompanying drawings:

[0058] Figure 1 It is a three-dimensional assembly schematic diagram of a PTC heating component according to a preferred embodiment of the present application;

[0059] Figure 2 It is a schematic diagram of the overall structure of a second electric heating device according to a preferred embodiment of the present application;

[0060] Figure 3 It is a schematic diagram of the three-dimensional assembly of a second electric heating device according to a preferred embodiment of the present application;

[0061] Figure 4 This is a schematic diagram of the internal structure of the first heat exchanger according to a preferred embodiment of the present application;

[0062] Figure 5 It is a schematic diagram of the internal structure of the second heat exchanger according to the preferred embodiment of the present application.

[0063] Figure Number:

[0064] 10-PTC heating element; 11-first electrode sheet; 12-second electrode sheet; 13-first pin; 14-second pin; 15-first cover; 16-second cover; 17-first insulating spacer structure; 18-second insulating spacer structure;

[0065] 100 - first heat exchanger; 101 - inlet; 102 - first heat exchange cavity; 103 - first shell; 104 - first mounting surface; 105 - first inlet cavity; 106 - first medium channel; 107 - first outlet cavity; 108 - flow channel through hole;

[0066] 200 - second heat exchanger; 201 - outlet; 202 - second heat exchange chamber; 203 - second shell; 204 - second mounting surface; 205 - second inlet chamber; 206 - second medium channel; 207 - second outlet chamber;

[0067] 300-PTC heating component;

[0068] 400-Composite gasket. DETAILED DESCRIPTION

[0069] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with the implementation modes.

[0070] First, this application proposes a PTC heating component. Figure 1 This is a three-dimensional assembly diagram of the PTC heating component. Figure 1 As shown, the PTC heating component is in the shape of a flat plate having a first side direction X1 and a second side direction X2 facing away from the first side direction. The direction of the first side direction X1 and the direction of the second side direction X2 can also be understood as two opposite directions, that is, the PTC heating component in this application is a flat plate-shaped component, with its own plate-shaped component as the center, and has opposite sides at the same time.

[0071] The PTC heating assembly in the present application includes: a plurality of PTC heating elements 10, a first electrode sheet 11, a second electrode sheet 12, a first cover 15 and a second cover 16. With the plurality of PTC heating elements 10 as the center, the first electrode sheet 11 and the first cover 15 are arranged in the first lateral direction X1, and the second electrode sheet 13 and the second cover 15 are arranged in the second lateral direction X2. The two electrode sheets are the two poles of the electrode, respectively, and supply power to the plurality of PTC heating elements 10 to make the plurality of PTC heating elements 10 heat up. The two covers serve as insulating components to provide insulation protection for the entire PTC heating assembly, so that the PTC heating assembly can be used in combination with other components.

[0072] Specifically, a plurality of PTC heating elements 10 are arranged adjacent to each other in the extension direction of the flat plate, and each PTC heating element has a first electrical connection portion (not shown in the figure) for connecting the first electrode sheet 11 and a second electrical connection portion (not shown in the figure) for connecting the second electrode sheet 12. Specifically, the first electrical connection portion of each PTC heating element faces a first lateral direction X1 perpendicular to the extension direction of the flat plate, and the second electrical connection portion of each PTC heating element faces a second lateral direction X2 perpendicular to the extension direction of the flat plate.

[0073] Furthermore, the insides of the multiple PTC heating elements 10 also need to be connected in series or in parallel to achieve their respective heating. Specifically, the first electrode sheet 11 is electrically connected to the first electrical connection portion of each PTC heating element in the first lateral direction X1 and leads to a first pin 13, so that the first electrode sheet 11 uses the first pin 13 to collectively connect each PTC heating element 10 that needs to be heated; and the second electrode sheet 12 is electrically connected to the second electrical connection portion of each PTC heating element in the second lateral direction X2 and leads to a second pin 14, so that the second electrode sheet 12 uses the second pin 14 to collectively connect each PTC heating element 10 that needs to be heated, thereby connecting multiple PTC heating elements in series or in parallel with each other through the first electrode sheet 11 and the second electrode sheet 12. Among them, the pin can be specifically expressed as a bus, which can be specifically set to be composed of a metal insert wrapped in plastic, with metal sheets left at both ends, wherein the metal sheet at one end is connected to the electrode sheet, and the connection can be made by soldering or silver glue bonding, and the other end is connected to the external control circuit board, and the connection can be made by soldering or elastic plugging.

[0074] It can be understood that, firstly, such a structure can realize the electrical connection between the two electrode sheets and each PTC heating element, avoiding a large number of spring clip connections or soldering, and improving the reliability of the product. Secondly, this can also flexibly realize the series or parallel connection between the PTC heating elements, making it easy to group the PTC heating elements to realize the power grading control of the heating, thereby simplifying the control strategy and reducing the control cost. Finally, the electrode sheet is used to lead out the pins at the electrical connection part and electrically connect them, avoiding the structure of connecting multiple electrode sheets with a traditional bus, reducing the component cost and increasing the reliability of the connection.

[0075] At the same time, the first cover 15 and the second cover 16 respectively cover and insulate the PTC heating element 10 and the first electrode sheet 11 and the second electrode sheet 12 in the first lateral direction X1 and the second lateral direction X2 .

[0076] At this point, the PTC heating component provided in the present application can be understood as a flat component with a "sandwich" structure, and its two sides from the outermost layer to the middle layer are sequentially expressed as an insulating layer, a conductive layer and a heating layer, wherein the insulating layer and the conductive layer are on both sides of the heating layer, "sandwiching" the heating layer. Such a "sandwich-type" heating structure can first realize the electrical connection between the conductive layer and other peripheral components while realizing the insulation of the conductive layer and other peripheral components, thereby reducing the interface thermal resistance. Secondly, by arranging the conductive layer and the insulating layer on both sides of the first lateral direction X1 and the second lateral direction X2 of the heating layer at the same time, both sides of the heating layer can be connected to other components to form a heating device, so that both sides of the heating layer have a better heat dissipation effect, avoiding the situation where the heating layer is continuously high in temperature due to heat accumulation, thereby providing more options for the selection of the heating layer, such as selecting ceramics with a low Curie temperature (Tc), thereby reducing the lead content.

[0077] Further specifically, the structure of the PTC heating element includes but is not limited to one or more of the following structures: each PTC heating element has the same shape and size; each PTC heating element is in the shape of a cuboid, a cube or a cylinder; there is a gap or no gap between adjacent PTC heating elements; there is no connection relationship between multiple PTC heating elements; there is a connection relationship between multiple PTC heating elements; multiple PTC heating elements are all positioned in the same frame. Among them, the structure of no connection relationship between multiple PTC heating elements and a connection relationship between multiple PTC heating elements can be understood as: there is no connection relationship between some of the PTC heating elements, and there is a connection relationship between the other part of the PTC heating elements. The structure of no connection relationship between multiple PTC heating elements or a connection relationship between multiple PTC heating elements can be understood as: there is no connection relationship between all PTC heating elements, or there is a connection relationship between all PTC heating elements. Multiple PTC heating elements are all positioned in the same frame to be understood as: all PTC heating elements are integrated in one frame and appear as a detachable whole.

[0078] The electrical connection between the first electrode sheet 11 and the first electrical connection portion of each PTC heating element, and / or the electrical connection between the second electrode sheet 12 and the second electrical connection portion of each PTC heating element, is achieved by at least one of the following methods: by direct contact using the pressing force between them; by welding; by bonding contact using a conductive medium. Among them, by direct contact using the pressing force between them, it can be understood that the first electrode sheet 12 and the second electrode sheet 13 clamp the upper and lower surfaces of the PTC heating element 10 from the first side direction X1 and the second side direction X2 inward, that is, in the direction of the PTC heating element 10, to achieve electrical connection. If the above-mentioned pressing contact effect is not good, welding or coating of a conductive medium between the electrode sheet and the PTC heating element for bonding contact can also be performed to achieve electrical connection.

[0079] Regarding the configuration of the two electrode sheets, the first electrode sheet 11 and / or the second electrode sheet 12 is a single conductive element or an assembly consisting of a plurality of conductive elements.

[0080] Regarding the configuration of two electrode sheets and two covers, the first electrode sheet 11 is integrated on the inner side of the first cover 15 facing the PTC heating element, and / or the second electrode sheet 12 is integrated on the inner side of the second cover 16 facing the PTC heating element, that is, the electrode sheet is prepared on the cover, so that the electrode sheet and the cover form a whole, so that the electrode sheet is insulated from the outside, and the interface thermal resistance is reduced. It is understandable that the electrode sheet will not be unable to be energized because it is prepared on an insulating cover, because both electrode sheets have corresponding pins at the electrical connection portion.

[0081] The material of the first electrode sheet 11 and / or the second electrode sheet 12 includes, but is not limited to: tin, copper, silver, gold or alloys thereof.

[0082] In order to solve the problem of electrical gap and insulation between the two electrode sheets, a gap or insulating spacer structure can be set between the first electrode sheet 11 and the second electrode sheet 12 and in the non-contact area with the PTC heating element 10. The insulating spacer structure is a separate insulating member or is integrated on the surface of the first electrode sheet 11 and / or the second electrode sheet 12 facing each other. Specifically, it can be: by integrating the corresponding first insulating spacer structure 17 and the second insulating spacer structure 18 on the first electrode sheet 11 and the second electrode sheet 12, the shape topology of the first insulating spacer structure 17 and the first electrode sheet 11 are complementary, and the shape topology of the second insulating spacer structure 18 and the second electrode sheet 12 are complementary, so as to achieve electrical insulation. Alternatively, the insulating spacer structure can also be directly set as a plastic or rubber filler to achieve electrical insulation.

[0083] The integrated arrangement of the electrode sheet and the cover, and the integrated arrangement of the insulating spacing structure between the two electrode sheets, include but are not limited to one or more of spraying, laser cladding, deposition, 3D printing or sintering.

[0084] Regarding the connection direction between the pin and the external control circuit board, the first pin 13 and the second pin 14 point in the same direction or in opposite directions, and the first pin 13 and the second pin 14 include at least one conductive track to adapt to different external structures and realize conductivity between the electrode sheet and the external control circuit board.

[0085] The PTC heating component provided in the present application is in the shape of a flat plate having a first side and a second side facing away from the first side. With multiple PTC heating elements as the center, a first electrode sheet and a first cover are arranged in the first side, and a second electrode sheet and a second cover are arranged in the second side, so that the PTC heating component as a whole constitutes a flat "sandwich" structure with insulating layers and conductive layers on both sides that "sandwich" the heating layer from the outside to the inside. Without affecting the electrical connection between the conductive layer and the heating layer, the insulation of the conductive layer and other external components is achieved, the interface thermal resistance is reduced, and the two sides of the heating layer have a better heat dissipation effect, thereby avoiding the situation where the heating layer is continuously at high temperature due to heat accumulation.

[0086] In a second aspect, the present application further provides an electric heating device, which includes: a first heat exchanger, a second heat exchanger and at least one PTC heating component. The first heat exchanger includes a first heat exchange cavity having a first inlet and a first outlet. The second heat exchanger includes a second heat exchange cavity having a second inlet and a second outlet. The PTC heating component is in the shape of a flat plate, clamped between the first heat exchange cavity of the first heat exchanger and the second heat exchange cavity of the second heat exchanger, and the PTC heating component is the above-mentioned PTC heating component.

[0087] Furthermore, if the electric heating device includes a plurality of PTC heating components, then: each PTC heating component may share a first cover 15 or a second cover 16, and correspondingly, each PTC heating component may also include a first cover 15 or a second cover 16 that is independent of each other. Specifically, if the electric heating device includes a plurality of PTC heating components, each PTC heating component may only share a first cover 15 and include a second cover 16 that is independent of each other, or each PTC heating component only shares a second cover 16 and includes a first cover 15 that is independent of each other, or each PTC heating component shares a first cover 15 and a second cover 16, or each PTC heating component includes a first cover 15 that is independent of each other and a second cover 16 that is independent of each other.

[0088] In this embodiment, a PTC heating component with good heat dissipation effect on both sides is used, and two heat exchangers with independent medium flow channels are arranged on both sides of the PTC heating component, and the PTC heating component is "sandwiched" in the middle, so that both sides of the electric heating device also have a heat dissipation effect, thereby making its overall use effect better. In addition, other preferred embodiments of this embodiment, the technical problems that can be solved and the technical effects that can be achieved are the same as those of the above-mentioned PTC heating component, and will not be repeated here.

[0089] In a third aspect, the present application also provides a second electric heating device, Figure 1-3 As shown, the electric heating device includes: a first heat exchanger 100, a second heat exchanger 200 and at least one PTC heating component 300. The first heat exchanger 100 includes a first heat exchange cavity 102 having an inlet 101. The second heat exchanger 200 includes a second heat exchange cavity 202 having an outlet 201, and the second heat exchange cavity 202 is in fluid communication with the first heat exchange cavity 102, so that the inlet 101 is in fluid communication with the outlet 201. The PTC heating component 300 is in the shape of a flat plate, and is clamped between the first heat exchange cavity 102 of the first heat exchanger and the second heat exchange cavity 202 of the second heat exchanger, and the PTC heating component is a PTC heating component that can dissipate heat on both sides.

[0090] Similarly, in this embodiment, if the electric heating device includes multiple PTC heating components 300, the arrangement of the common cover or the independent cover is the same as that of the previous embodiment of the electric heating device, which will not be repeated here.

[0091] Compared with the previous embodiment of the electric heating device, the first heat exchanger 100 and the second heat exchanger 200 in this embodiment are not independent mechanisms. The fluid medium flows in from the inlet 101 of the first heat exchanger 100, passes through the first heat exchange cavity 102 of the first heat exchanger 100 and the second heat exchange cavity 202 of the second heat exchanger 200, and then flows out from the outlet 201 of the second heat exchanger 200. When the medium flows through the first heat exchange cavity 102 of the first heat exchanger 100, the PTC heating component 300 with good heat dissipation effect on both sides is also used to exchange heat with the medium in the first heat exchange cavity 102 and the second heat exchange cavity 202 sandwiched therebetween, so that both sides of the electric heating device have heat dissipation effect, the overall use effect is better, and the required medium circulation structure is simpler.

[0092] Specifically, with respect to the construction of the heat exchange chamber and the PTC heating component, the first heat exchange chamber 102 of the first heat exchanger 100 has a first shell 103 facing the PTC heating component 300, and the first shell includes a first cover 15; and / or the second heat exchange chamber 202 of the second heat exchanger 200 has a second shell 203 facing the PTC heating component 300, and the second shell 203 includes a second cover 16.

[0093] Among them, the first cover 15 and the second cover 16 are the same as described above, and are respectively used to provide insulation protection for the PTC heating component 300 at the connection surface with the first heat exchange cavity 102 and the second heat exchange cavity 202. The first shell 103 includes the first cover 15 and / or the second shell 203 includes the second cover 16, and it can be understood that the shell including the cover has the function of isolating and protecting the corresponding heat exchange cavity, and insulating the corresponding heat exchange cavity and the PTC heating component. Specifically, it can be: the shell is connected to the corresponding heat exchanger by mechanical bite or other means, and the shell itself can be used as a cover with insulation function, and an inseparable whole is formed on the corresponding heat exchanger by plasma deposition or thick film sintering.

[0094] In order to make the shell have both heat conduction and insulation functions, the specific structure of the shell can be specifically as follows: the first shell 103 is made of metal material so that the shell has good thermal conductivity. The shell also has a first mounting surface 104 facing the PTC heating component 300, the first mounting surface 104 also needs to have good thermal conductivity, and is provided with a first cover 15 for achieving electrical insulation between the PTC heating component and the first shell 103, the first cover 15 is integrated with a first electrode sheet 13 for electrical connection with the PTC heating element, so that the shell has good insulation to the PTC heating element and the electrode sheet; and / or the second shell 203 is the same as the first shell 103, made of metal material and has a second mounting surface 204 facing the PTC heating component 300, the second mounting surface 204 is provided with a second cover 16 for achieving electrical insulation between the PTC heating component and the second shell, the second cover 16 is integrated with a second electrode sheet 14 for electrical connection with the PTC heating element.

[0095] The structure of the above-mentioned insulating layer and the mounting surface can be specifically as follows: the first cover 15 is integrated on the first mounting surface 104 by deposition or sintering; and / or the second cover 16 is integrated on the second mounting surface 204 by deposition or sintering. This integration method can reduce the interface thermal resistance.

[0096] Regarding the structure of the above-mentioned insulating layer itself, it can be specifically as follows: the material of the first cover member 15 and / or the second cover member 16 is alumina ceramic or a polymer containing ceramic particles.

[0097] like Figure 4 , 5 As shown, with respect to the flow direction of the medium in the second heat exchange cavity 202 and the first heat exchange cavity 102, the first heat exchanger 100 with the inlet 101 can be set as the lower heat exchanger, and the second heat exchanger 200 with the outlet 201 can be set as the upper heat exchanger, and the medium enters from the first heat exchanger 100 at the bottom in the gravity direction, and flows out from the second heat exchanger 200 at the top in the gravity direction. Specifically, the medium enters the first inlet cavity 105 of the first heat exchanger 100 from the inlet 101, passes through the first medium channel 106 inside the first heat exchange cavity 102 to reach the first outlet cavity 107 of the first heat exchanger 100, and then enters the second inlet cavity 205 of the second heat exchanger 200 through the flow channel through hole 108 connecting the first outlet cavity 107 and the second inlet cavity 205, and flows out from the second outlet cavity 207 and the outlet 201 of the second heat exchanger 200 through the second medium channel 206 parallel to each other in the second heat exchange cavity 202.

[0098] Among them, in view of the design of the internal flow channels of the first heat exchange chamber 102 and the second heat exchange chamber 202, the volumes of the inlet chamber 105, the second inlet chamber 205, the first outlet chamber 107 and the second outlet chamber 207 of the first heat exchange chamber 102 and the second heat exchange chamber 202 are gradually increased in the direction of the flow channel hole and the water nozzle, so as to achieve the effect of increasing the back pressure of the water flow to adjust the flow rate. In addition, the cross-sectional areas of each channel in the internal medium channel 106 of the first heat exchange chamber 102 are different, and the cross-sectional areas of the medium channels closer to the water nozzle inlet 101 and the flow channel hole are smaller, so as to adjust the pressure of the inlet chamber of the first heat exchange chamber 102. In addition, the first medium channel 106 and the second medium channel 206 in the first heat exchange chamber 102 and the second heat exchange chamber 202 are both designed with parallel channels, which can also avoid large temperature differences between each PTC heating element and provide product reliability.

[0099] For the fluid sealing structure between the heat exchangers, a composite sealing gasket 400 can be set around the PTC heating component 300 and in the connection area between the first heat exchanger 100 and the second heat exchanger 200 to achieve the sealing of the electrical compartment. The composite sealing gasket 400 is a centrally hollowed structure, which is used to set the PTC heating component 300 in the central area, and isolate the first heat exchanger 100 and the second heat exchanger 200 in the area in contact with the first heat exchanger 100 and the second heat exchanger 200 to achieve a medium fluid sealed connection between the two. The composite sealing gasket 400 can be specifically composed of a metal core plate and a coating attached to the metal core plate, while ensuring that the PTC heating component 300 is not crushed during the assembly process.

[0100] The second electric heating device provided by the present application also utilizes a PTC heating component with good heat dissipation effect on both sides, and two heat exchangers with medium flow channels connected on both sides are arranged to "sandwich" the PTC heating component in the middle, so that both sides of the electric heating device also have heat dissipation effect. In addition, the structure of the second electric heating device is simpler and the overall use effect is better. Other preferred embodiments of this embodiment, the technical problems that can be solved and the technical effects that can be achieved are the same as those of the above-mentioned PTC heating component, and will not be repeated here.

[0101] The preferred embodiments of the present application are described in detail above; however, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0102] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0103] In addition, the various implementation modes of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A PTC heating component, the PTC heating component being in the shape of a plate having a first side (X1) and a second side (X2) facing away from the first side, comprising: A plurality of PTC heating elements (10), the plurality of PTC heating elements (10) being arranged adjacent to each other in the extension direction of the flat plate, the first electrical connection portion of each PTC heating element being oriented toward a first lateral direction (X1) perpendicular to the extension direction of the flat plate, and the second electrical connection portion of each PTC heating element being oriented toward a second lateral direction (X2) perpendicular to the extension direction of the flat plate; a first electrode sheet (11) and a second electrode sheet (12), the first electrode sheet (11) being electrically connected to the first electrical connection portion of each of the PTC heating elements in the first lateral direction (X1) and having a first lead (13) extending therefrom, and the second electrode sheet (12) being electrically connected to the second electrical connection portion of each of the PTC heating elements in the second lateral direction (X2) and having a second lead (14) extending therefrom, wherein the plurality of PTC heating elements are connected in series or in parallel with each other via the first electrode sheet (11) and the second electrode sheet (12); and A first cover (15) and a second cover (16), the first cover (15) and the second cover (16) respectively cover and insulate the PTC heating element and the first electrode sheet (11) and the second electrode sheet (12) in the first lateral direction (X1) and the second lateral direction (X2).

2. The PTC heating component according to claim 1, wherein: Each PTC heating element has the same shape and size; and / or Each PTC heating element is in the shape of a cuboid, a cube or a cylinder; and / or There is or is no gap between adjacent PTC heating elements; and / or There is no connection between the multiple PTC heating elements; and / or The plurality of PTC heating elements are connected to each other; and / or The multiple PTC heating elements are all positioned and arranged in the same frame.

3. The PTC heating component according to claim 1, wherein: The electrical connection between the first electrode sheet (11) and the first electrical connection portion of each of the PTC heating elements, and / or the electrical connection between the second electrode sheet (12) and the second electrical connection portion of each of the PTC heating elements is achieved by at least one of the following methods: This is achieved by direct contact using the pressing force between each other; This is achieved by welding; This is achieved by bonding contact through a conductive medium.

4. The PTC heating component according to claim 1, wherein: The first electrode sheet (11) and / or the second electrode sheet (12) is a single conductive element or an assembly consisting of multiple conductive elements.

5. The PTC heating component according to claim 1, wherein: The first electrode sheet (11) is integrally arranged on the inner side of the first cover (15) facing the PTC heating element; and / or The second electrode sheet (12) is integrally arranged on the inner side surface of the second cover (16) facing the PTC heating element.

6. The PTC heating component according to claim 1, wherein: The material of the first electrode sheet (11) and / or the second electrode sheet (12) is tin, copper, silver, gold or an alloy thereof.

7. The PTC heating component according to claim 1, wherein: A gap or an insulating spacer structure is provided between the first electrode sheet (11) and the second electrode sheet (12); the insulating spacer structure is a separate insulating member or is integrated and arranged on the surface of the first electrode sheet (11) and / or the second electrode sheet (12) facing each other.

8. The PTC heating component according to claim 5 or 7, wherein: The integrated setting method includes one of spraying, laser cladding, deposition, 3D printing or sintering.

9. The PTC heating component according to claim 1, wherein: The first pin (13) and the second pin (14) point in the same direction or in opposite directions; Furthermore, the first pin (13) and the second pin (14) include at least one conductive track.

10. An electric heating device, comprising: A first heat exchanger, the first heat exchanger comprising a first heat exchange chamber having a first inlet and a first outlet; and a second heat exchanger comprising a second heat exchange chamber having a second inlet and a second outlet; as well as At least one flat-plate-shaped PTC heating component is clamped between the first heat exchange cavity of the first heat exchanger and the second heat exchange cavity of the second heat exchanger, and the PTC heating component is the PTC heating component according to any one of claims 1-9.

11. The electric heating device according to claim 10, wherein: If the electric heating device includes a plurality of PTC heating components, then: Each of the PTC heating components shares a first cover (15) and each of the PTC heating components includes a second cover (16) that is independent of the other; or Each of the PTC heating components shares a second cover (16), and each of the PTC heating components includes a first cover (15) that is independent of the other; or Each of the PTC heating components shares a first cover (15) and a second cover (16); or Each of the PTC heating components comprises a first independent cover (15) and a second independent cover (16).

12. An electric heating device, comprising: A first heat exchanger (100), the first heat exchanger (100) comprising a first heat exchange chamber (102) having an inlet (101); and A second heat exchanger (200), the second heat exchanger (200) comprising a second heat exchange chamber (202) having an outlet (201), the second heat exchange chamber (202) being in fluid communication with the first heat exchange chamber (102), so that the inlet (101) is in fluid communication with the outlet (201); and At least one flat-plate-shaped PTC heating component (300) is clamped between the first heat exchange chamber (102) of the first heat exchanger and the second heat exchange chamber (202) of the second heat exchanger, and the PTC heating component is the PTC heating component described in any one of claims 1 to 9.

13. The electric heating device according to claim 12, wherein: The first heat exchange chamber (102) has a first shell (103) facing the PTC heating component (300), and the first shell (103) includes the first cover (15); and / or The second heat exchange chamber (202) has a second shell (203) facing the PTC heating component (300), and the second shell (203) includes the second cover (16).

14. The electric heating device according to claim 13, wherein: The first housing (103) is made of a metal material and has a first mounting surface (104) facing the PTC heating component (300), the first mounting surface (104) being provided with a first cover (15) for achieving electrical insulation between the PTC heating component and the first housing (103), the first cover (15) being integrated with the first electrode sheet (13) for being electrically connected to the PTC heating element; and / or The second shell (203) is made of a metal material and has a second mounting surface (204) facing the PTC heating component (300), the second mounting surface (204) is provided with a second cover (16) for achieving electrical insulation between the PTC heating component and the second shell, and the second electrode sheet (14) for electrically connecting to the PTC heating element is integrated on the second cover (16).

15. The electric heating device according to claim 14, wherein: The first covering member (15) is integrated on the first mounting surface (104) by means of deposition or sintering; and / or the second covering member (16) is integrated on the second mounting surface (204) by means of deposition or sintering.

16. The electric heating device according to claim 15, wherein: The material of the first cover member (15) and / or the second cover member (16) is aluminum oxide ceramic or a polymer containing ceramic particles.

17. The electric heating device according to any one of claims 12 to 16, wherein: If the electric heating device includes a plurality of PTC heating components, then: Each of the PTC heating components shares a first cover (15) and each of the PTC heating components includes a second cover (16) that is independent of the other; or Each of the PTC heating components shares a second cover (16), and each of the PTC heating components includes a first cover (15) that is independent of the other; or Each of the PTC heating components shares a first cover (15) and a second cover (16); or Each of the PTC heating components comprises a first independent cover (15) and a second independent cover (16).

Images