Heat exchange device for PTC heater
By introducing a spoiler group into the PTC heater, changing the liquid flow state to turbulence, the problem of low heating efficiency in the prior art is solved, and more efficient heat transfer and heating effects are achieved.
Patent Information
- Application Number
- CN202421688232.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-17
AI Technical Summary
In the heating assembly of the existing PTC heater, the liquid flows through two parallel heating pipes in a laminar state, resulting in poor heating effect and low efficiency.
A spoiler group is introduced into the PTC heater, including the spoiler main plate and the elastic limiting member, forming a curved projection, so that the liquid flow changes from laminar flow to turbulent flow, increasing the impact of liquid on the heating pipe fittings, and fixing it in the liquid flow channel through the elastic limiting member.
Through the design of the spoiler group, the heat transfer power of the liquid to the surface of the heating pipe fitting is improved, the overall power of the PTC heater is increased, and the heating effect and efficiency are improved.
Smart Images
Figure CN223064074U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heating, in particular to a heat exchange device for a PTC heater. Background Art
[0002] A PTC heater is an electrothermal device with high safety and good energy-saving effect, and is widely used in new energy vehicles and household appliances. The PTC heater adopts a ceramic heating element with a positive temperature coefficient. Under the condition of constant voltage, as the temperature rises, the resistance value of the PTC material will also increase. When reaching a certain temperature, the energy consumed will decrease, so as to automatically maintain a relatively constant temperature.
[0003] At present, the heating component of the PTC heater welds the heating tube on the integrated board by laser welding, and welds the bottom cover at the bottom of the heating tube to realize the sealing of the heating tube. The liquid to be heated flows through the middle of two parallel heating tubes, and the liquid continuously contacts the heating tubes to realize the heating of the liquid. This heating component realizes the light weight of the heating body.
[0004] However, the fluid state of the liquid flowing through the two parallel heating tubes is laminar flow, so the heating effect of the liquid between the two parallel heating tubes is not good and the heating efficiency is low. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a heat exchange device for a PTC heater, which has good heating effect and high heating efficiency.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] There is provided a heat exchange device for a PTC heater. The heat exchange device includes a housing and a plurality of heating pipe fittings spaced apart in the housing, and a liquid flow channel is formed between every two adjacent heating pipe fittings. The heat exchange device for a PTC heater includes:
[0008] A spoiler plate group, the spoiler plate group includes a spoiler main board and a plurality of elastic limit members. The projection of the spoiler main board along the first direction is a curve, and it is arranged in the liquid flow channel. The plurality of elastic limit members are connected to the spoiler main board and abut against the heating pipe fittings on both sides of the spoiler main board along the second direction, so as to fix the spoiler main board in the liquid flow channel.
[0009] Optionally, the spoiler main board includes a plurality of connecting straight plates and a plurality of arc plates. A plurality of arc plates arranged side by side at intervals are provided between two adjacent connecting straight plates, and the elastic limit members are connected to the connecting straight plates.
[0010] Optionally, the radian directions of the arc plates connected to both sides of the connecting straight plate along the third direction are opposite.
[0011] Optionally, a flow-through long hole is formed between two adjacent arc-shaped plates along the first direction, and the elastic limiting member connected to the connecting straight plate passes through the flow-through long hole and abuts against the heating pipe member.
[0012] Optionally, the elastic limiting member includes a plurality of first elastic pieces and a plurality of second elastic pieces. One first elastic piece and one second elastic piece arranged at intervals along the first direction on the spoiler main board are set as a set of fixing units, and multiple sets of the fixing units are arranged on the spoiler main board along the third direction;
[0013] The bending directions of the first elastic pieces and the second elastic pieces in two adjacent sets of the fixing units are the same, and the bending directions of the first elastic piece and the second elastic piece in the same set of the fixing units are opposite.
[0014] Optionally, the elastic limiting member includes a plurality of first elastic pieces and a plurality of second elastic pieces. One first elastic piece and one second elastic piece arranged at intervals along the first direction on the spoiler main board are set as a set of fixing units, and multiple sets of the fixing units are arranged on the spoiler main board along the third direction;
[0015] The bending directions of the first elastic pieces and the second elastic pieces in two adjacent sets of the fixing units are opposite, and the bending directions of the first elastic piece and the second elastic piece in the same set of the fixing units are the same.
[0016] Optionally, the elastic limiting member includes a plurality of first elastic pieces and a plurality of second elastic pieces. One first elastic piece and one second elastic piece arranged at intervals along the first direction on the spoiler main board are set as a set of fixing units, and multiple sets of the fixing units are arranged on the spoiler main board along the third direction;
[0017] The bending directions of the first elastic pieces and the second elastic pieces in two adjacent sets of the fixing units are opposite, and the bending directions of the first elastic piece and the second elastic piece in the same set of the fixing units are opposite.
[0018] Optionally, the elastic limiting member includes a plurality of first elastic pieces and a plurality of second elastic pieces. The plurality of first elastic pieces and the plurality of second elastic pieces are alternately connected to the spoiler main board along the third direction, and the bending directions of two adjacent first elastic pieces and second elastic pieces are opposite.
[0019] Optionally, the heat exchange device for the PTC heater further includes a plurality of heat dissipation fins. The plurality of heat dissipation fins are arranged on both sides of the heating pipe member along the second direction, and both the first elastic piece and the second elastic piece are pressed against the heat dissipation fins in the corresponding directions.
[0020] Optionally, the width of the first elastic sheet along the first direction is different from the width of the second elastic sheet along the first direction, and the number of heat dissipation fins pressed by the first elastic sheet is different from the number of heat dissipation fins pressed by the second elastic sheet.
[0021] Advantages of the present utility model:
[0022] The present utility model provides a heat exchange device for a PTC heater. By abutting a plurality of elastic limit members against the heating pipe fittings on both sides of the turbulator main board along the second direction, the turbulator main board whose projection along the first direction is a curve is fixedly connected in the liquid flow channel between two adjacent heating pipe fittings, so that the liquid flowing in the liquid flow channel is changed from laminar flow to turbulent flow under the action of the turbulator main board whose projection is a curve, increasing the impact of the liquid on the heating pipe fittings. And under the turbulator effect of the turbulator plate group, the liquid per unit volume flowing through the surface of the heating pipe fittings can take away more heat, increasing the heat transfer power on the surface of the heating pipe fittings, thereby increasing the overall power of the PTC heater, improving the heating effect, and enhancing the heating efficiency. Description of the Drawings
[0023] Figure 1 is the three-dimensional assembly drawing of the heat exchange device for a PTC heater provided by the present utility model;
[0024] Figure 2 is the plan assembly drawing of the heat exchange device for a PTC heater provided by the present utility model;
[0025] Figure 3 is the structural state diagram of the heat exchange device for a PTC heater provided by the present utility model when the turbulator plate group is not assembled;
[0026] Figure 4 is the structural display drawing of the turbulator plate group in the heat exchange device for a PTC heater provided by the present utility model.
[0027] In the figure:
[0028] 1. Heating pipe fitting;
[0029] 2. Turbulator plate group; 21. Turbulator main board; 211. Connecting straight plate; 212. Arc plate; 213. Long through hole; 22. Elastic limit member; 221. First elastic sheet; 222. Second elastic sheet;
[0030] 3. Heat dissipation fin;
[0031] 4. Partition member. Detailed Embodiment
[0032] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present utility model and not for limiting the present utility model. In addition, it should be noted that for the sake of description, only the parts related to the present utility model are shown in the drawings rather than all the structures.
[0033] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.
[0035] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.
[0036] A PTC heater is an electrothermal device with high safety and good energy-saving effect, and is widely used in new energy vehicles and household appliances. Among them, the PTC heater uses a ceramic heating element with a positive temperature coefficient. Under the condition of constant voltage, as the temperature rises, the resistance value of the PTC material will also increase. When a certain temperature is reached, the energy consumed by it will decrease, thereby automatically maintaining a relatively constant temperature.
[0037] At present, the heating component of the PTC heater welds the heating tube on the integrated board through laser welding, and welds the bottom cover at the bottom of the heating tube to achieve the sealing of the heating tube. The liquid to be heated flows through the middle of two parallel heating tubes, and the liquid continuously contacts the heating tube to achieve the heating of the liquid. This heating component realizes the lightweight of the heating body.
[0038] However, the fluid state of the liquid flowing through the two parallel heating tubes is laminar flow, so the heating effect of the liquid between the two parallel heating tubes is not good, and the heating efficiency is low.
[0039] Therefore, in order to improve the heating effect and heating efficiency, this embodiment provides a heat exchange device for a PTC heater. The heat exchange device includes a housing and a plurality of heating pipe fittings spaced apart in the housing, and a liquid flow channel is formed between every two adjacent heating pipe fittings.
[0040] As Figures 1 to 4 shown, the heat exchange device for the PTC heater further includes a spoiler plate group 2 composed of a spoiler main board 21 and a plurality of elastic limit members 22. The projection of the spoiler main board 21 along the first direction is a curve, and it is arranged in the liquid flow channel. The plurality of elastic limit members 22 are connected to the spoiler main board 21 and abut against the heating pipe fittings 1 on both sides of the spoiler main board 21 along the second direction, so as to fix the spoiler main board 21 in the liquid flow channel.
[0041] By abutting the plurality of elastic limit members 22 against the heating pipe fittings 1 on both sides of the spoiler main board 21 along the second direction, the spoiler main board 21 whose projection along the first direction is a curve is fixedly connected in the liquid flow channel between two adjacent heating pipe fittings 1, so that the liquid flowing in the liquid flow channel is changed from laminar flow to turbulent flow under the action of the spoiler main board 21 whose projection is a curve, increasing the impact of the liquid on the heating pipe fittings 1. Under the spoiler effect of the spoiler plate group 2, the liquid flowing through the surface of the heating pipe fitting 1 per unit volume can take away more heat, increasing the heat transfer power on the surface of the heating pipe fitting 1, thereby increasing the overall power of the PTC heater, improving the heating effect, and improving the heating efficiency.
[0042] In this embodiment, when assembling the spoiler plate group 2, the thickness of the spoiler plate group 2 can be reduced by pressing the elastic limit member 22 towards the direction close to the spoiler main board 21, so as to facilitate putting the spoiler plate group 2 into the liquid flow channel between the two heating pipe fittings 1. Then, release the elastic limit member 22, so that it resumes its original state under the action of its own elastic force, and finally presses against the adjacent heating pipe fitting 1, finally realizing the fixation of the spoiler main board 21. Since the elastic limit member 22 can be pressed to separate it from the corresponding heating pipe fitting 1, it is convenient to disassemble and replace the spoiler plate group 2.
[0043] Optionally, as Figure 4As shown in the figure, the spoiler main board 21 includes a plurality of connecting straight plates 211 and a plurality of arc plates 212. A plurality of arc plates 212 arranged side by side at intervals are provided between two adjacent connecting straight plates 211, and the elastic limiting member 22 is connected to the connecting straight plate 211. By arranging a plurality of arc plates 212 between two adjacent connecting straight plates 211, the liquid flowing through the spoiler main board 21 forms a turbulent flow under the action of the arc plates 212, and by arranging the connecting straight plates 211, a connecting position is provided for the connection of the elastic limiting member 22, facilitating the connection between the elastic limiting member 22 and the spoiler main board 21.
[0044] The number of arc plates 212 located between two adjacent connecting straight plates 211 can be set according to requirements. In this embodiment, three arc plates 212 are provided between two adjacent connecting straight plates 211.
[0045] Optionally, as Figure 4 shown, the arc directions of the arc plates 212 connected to both sides of the connecting straight plate 211 along the third direction are opposite. By making the arc directions of the arc plates 212 connected to both sides of the connecting straight plate 211 along the third direction opposite, the spoiler main board 21 is in a wavy shape, thereby increasing the degree of turbulent flow.
[0046] In this embodiment, on the premise of ensuring that the arc directions of the arc plates 212 on both sides of the connecting straight plate 211 along the third direction are opposite, the arc directions of the arc plates 212 between the same group of two adjacent connecting straight plates 211 can be the same or opposite, thereby further increasing the degree of turbulent flow of the flowing liquid.
[0047] Optionally, as Figure 4 shown, a long through-hole 213 is formed between two adjacent arc plates 212 along the first direction, and the elastic limiting member 22 connected to the connecting straight plate 211 passes through the long through-hole 213 and abuts against the heating pipe fitting 1. Since two adjacent arc plates 212 arranged along the first direction are spaced apart, a long through-hole 213 is formed between the two adjacent arc plates 212. On the one hand, more space can be left as much as possible to make the liquid heat exchange path longer, thereby improving the heating efficiency and heating effect. On the other hand, it can also provide space for the bending of the elastic limiting member 22, facilitating the elastic limiting member 22 to pass through the long through-hole 213 and abut against the heating pipe fitting 1.
[0048] In this embodiment, since there are three arc plates 212 between two adjacent connecting straight plates 211, two long through-holes 213 are formed between two adjacent connecting straight plates 211. An elastic limiting member 22 can be provided at each long through-hole 213, or an elastic limiting member 22 can be selectively provided at some of the long through-holes 213, and the specific layout method can be freely adjusted according to actual requirements.
[0049] Optionally, the elastic limiting member 22 includes a plurality of first elastic pieces 221 and a plurality of second elastic pieces 222. One first elastic piece 221 and one second elastic piece 222 that are arranged at intervals in the first direction on the spoiler main board 21 are set as a set of fixing units, and multiple sets of fixing units are arranged on the spoiler main board 21 in the third direction;
[0050] The bending directions of the first elastic pieces 221 and the second elastic pieces 222 in two adjacent sets of fixing units are the same, and the bending directions of the first elastic piece 221 and the second elastic piece 222 in the same set of fixing units are opposite.
[0051] By using the first elastic piece 221 and the second elastic piece 222 to form the elastic limiting member 22, setting one first elastic piece 221 and one second elastic piece 222 that are arranged at intervals in the first direction on the spoiler main board 21 as a set of fixing units, and arranging multiple sets of fixing units on the spoiler main board 21 in the third direction. In addition, the bending directions of the first elastic pieces 221 and the second elastic pieces 222 in two adjacent sets of fixing units are the same, and the bending directions of the first elastic piece 221 and the second elastic piece 222 in the same set of fixing units are opposite. Thereby increasing the structural complexity of the spoiler group 2, so that the turbulence degree of the liquid flowing through the spoiler group 2 is higher, further extending its flow path and the heating time, thereby improving the heating efficiency and heating effect.
[0052] Optionally, the elastic limiting member 22 includes a plurality of first elastic pieces 221 and a plurality of second elastic pieces 222. One first elastic piece 221 and one second elastic piece 222 that are arranged at intervals in the first direction on the spoiler main board 21 are set as a set of fixing units, and multiple sets of fixing units are arranged on the spoiler main board 21 in the third direction;
[0053] The bending directions of the first elastic pieces 221 and the second elastic pieces 222 in two adjacent sets of fixing units are opposite, and the bending directions of the first elastic piece 221 and the second elastic piece 222 in the same set of fixing units are the same.
[0054] By using the first elastic piece 221 and the second elastic piece 222 to form the elastic limiting member 22, setting one first elastic piece 221 and one second elastic piece 222 that are arranged at intervals in the first direction on the spoiler main board 21 as a set of fixing units, and arranging multiple sets of fixing units on the spoiler main board 21 in the third direction. In addition, the bending directions of the first elastic pieces 221 and the second elastic pieces 222 in two adjacent sets of fixing units are opposite, and the bending directions of the first elastic piece 221 and the second elastic piece 222 in the same set of fixing units are the same. Thereby increasing the structural complexity of the spoiler group 2, so that the turbulence degree of the liquid flowing through the spoiler group 2 is higher, further extending its flow path and the heating time, thereby improving the heating efficiency and heating effect.
[0055] Optionally, the elastic limiting member 22 includes a plurality of first elastic pieces 221 and a plurality of second elastic pieces 222. One first elastic piece 221 and one second elastic piece 222 that are arranged at intervals in the first direction on the spoiler main board 21 are set as a set of fixing units, and multiple sets of fixing units are arranged on the spoiler main board 21 in the third direction;
[0056] The bending directions of the first elastic pieces 221 and the second elastic pieces 222 in adjacent two sets of fixing units are opposite, and the bending directions of the first elastic piece 221 and the second elastic piece 222 in the same set of fixing units are opposite.
[0057] By using the first elastic piece 221 and the second elastic piece 222 to form the elastic limiting member 22, setting one first elastic piece 221 and one second elastic piece 222 that are arranged at intervals in the first direction on the spoiler main board 21 as a set of fixing units, and arranging multiple sets of fixing units on the spoiler main board 21 in the third direction. In addition, the bending directions of the first elastic pieces 221 and the second elastic pieces 222 in adjacent two sets of fixing units are opposite, and the bending directions of the first elastic piece 221 and the second elastic piece 222 in the same set of fixing units are opposite. Thereby increasing the structural complexity of the spoiler group 2, so that the turbulence degree of the liquid flowing through the spoiler group 2 is higher, further extending its flow path and the heating time, thereby improving the heating efficiency and heating effect.
[0058] Optionally, the elastic limiting member 22 includes a plurality of first elastic pieces 221 and a plurality of second elastic pieces 222. The plurality of first elastic pieces 221 and the plurality of second elastic pieces 222 are alternately connected to the spoiler main board 21 in the third direction, and the bending directions of adjacent two first elastic pieces 221 and second elastic pieces 222 are opposite. By alternately arranging the first elastic piece 221 and the second elastic piece 222 on the spoiler main board 21, the structural complexity of the spoiler group 2 is increased, so that the turbulence degree of the liquid flowing through the spoiler group 2 is higher, further extending its flow path and the heating time, thereby improving the heating efficiency and heating effect.
[0059] In this embodiment, the alternating arrangement manner of the first elastic piece 221 and the second elastic piece 222 can adopt a continuous alternating arrangement manner or an intermittent alternating manner. The specific arrangement manner can be selected according to actual requirements.
[0060] Optionally, as Figure 1 shown, the heat exchange device for the PTC heater further includes a plurality of heat dissipation fins 3. The plurality of heat dissipation fins 3 are arranged on both sides of the heating pipe member 1 in the second direction, and both the first elastic piece 221 and the second elastic piece 222 are pressed against the heat dissipation fins 3 in the corresponding direction.
[0061] By providing a plurality of heat dissipation fins 3, the heating area of the liquid is further increased, so that the liquid flowing through the surface of the heating pipe member 1 per unit volume can take away more heat, increasing the heat transfer power on the surface of the heating pipe member 1, thereby increasing the overall power of the PTC heater, improving the heating effect and enhancing the heating efficiency.
[0062] Furthermore, as Figure 2 shown, the width of the first elastic piece 221 in the first direction is different from the width of the second elastic piece 222 in the first direction, and the number of heat dissipation fins 3 pressed by the first elastic piece 221 is different from the number of heat dissipation fins 3 pressed by the second elastic piece 222. By providing heat dissipation fins 3 with a quantity adapted to the widths of the first elastic piece 221 and the second elastic piece 222, the contact area between the first elastic piece 221 and the second elastic piece 222 and the heat dissipation fins 3 is ensured, guaranteeing the fixing strength.
[0063] In this embodiment, three heat dissipation fins 3 correspond to the first elastic piece 221, and two heat dissipation fins 3 correspond to the second elastic piece 222.
[0064] Optionally, as Figure 2 shown, partition members 4 are connected to both sides of each heating pipe member 1 in the second direction, and adjacent partition members 4 on two adjacent heating pipe members 1 are in contact with each other to form two independent liquid flow channels between the two adjacent heating pipe members 1, and the heat dissipation fins 3 are evenly distributed on both sides of the partition members 4 in the first direction. By evenly distributing the heat dissipation fins 3 on both sides of the partition members 4 in the first direction, the heating efficiency of the two independent liquid flow channels between two adjacent heating pipe members 1 is ensured to be the same.
[0065] Optionally, as Figure 2 shown, the height of the partition member 4 in the second direction is greater than the height of the heat dissipation fin 3 in the second direction. By making the height of the partition member 4 in the second direction greater than the height of the heat dissipation fin 3 in the second direction, a gap for placing the turbulent flow main board 21 is reserved between two adjacent heat dissipation fins 3 belonging to different heating pipe members 1.
[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.
Claims
1. A heat exchange device for a PTC heater, the heat exchange device comprising a housing and a plurality of heating pipe elements (1) spaced apart within the housing, and a liquid flow channel being formed between every two adjacent heating pipe elements (1), characterized in that, The heat exchange device for the PTC heater further includes: A spoiler group (2), the spoiler group (2) includes a spoiler main board (21) and a plurality of elastic limit members (22), the projection of the spoiler main board (21) along the first direction is a curve, and it is arranged in the liquid flow channel. A plurality of the elastic limit members (22) are connected to the spoiler main board (21) and abut against the heating elements (1) on both sides of the spoiler main board (21) along the second direction, so as to fix the spoiler main board (21) in the liquid flow channel.
2. The heat exchange device for a PTC heater according to claim 1, wherein, The spoiler main board (21) includes a plurality of connecting straight plates (211) and a plurality of arc plates (212). A plurality of the arc plates (212) arranged side by side at intervals are provided between two adjacent connecting straight plates (211), and the elastic limit members (22) are connected to the connecting straight plates (211).
3. The heat exchange device for a PTC heater according to claim 2, characterized in that, The radian directions of the arc plates (212) connected to both sides of the connecting straight plate (211) along the third direction are opposite.
4. The heat exchange device for a PTC heater according to claim 2, wherein A long flow-through hole (213) is formed between two adjacent arc plates (212) along the first direction. The elastic limit member (22) connected to the connecting straight plate (211) passes through the long flow-through hole (213) and abuts against the heating element (1).
5. The heat exchange device for a PTC heater according to claim 1, characterized in that, The elastic limit member (22) includes a plurality of first elastic pieces (221) and a plurality of second elastic pieces (222). One first elastic piece (221) and one second elastic piece (222) arranged at intervals along the first direction on the spoiler main board (21) are set as a group of fixing units, and multiple groups of the fixing units are arranged on the spoiler main board (21) along the third direction; The bending directions of the first elastic pieces (221) and the second elastic pieces (222) in two adjacent groups of the fixing units are the same, and the bending directions of the first elastic piece (221) and the second elastic piece (222) in the same group of the fixing units are opposite.
6. The heat exchange device for a PTC heater according to claim 1, characterized in that, The elastic limit member (22) includes a plurality of first elastic pieces (221) and a plurality of second elastic pieces (222). One first elastic piece (221) and one second elastic piece (222) arranged at intervals along the first direction on the spoiler main board (21) are set as a group of fixing units, and multiple groups of the fixing units are arranged on the spoiler main board (21) along the third direction; The bending directions of the first elastic pieces (221) and the second elastic pieces (222) in two adjacent groups of the fixing units are opposite, and the bending directions of the first elastic piece (221) and the second elastic piece (222) in the same group of the fixing units are the same.
7. The heat exchange device for a PTC heater according to claim 1, characterized in that, The elastic limit member (22) includes a plurality of first elastic pieces (221) and a plurality of second elastic pieces (222). One first elastic piece (221) and one second elastic piece (222) arranged at intervals along the first direction on the spoiler main board (21) are set as a group of fixing units, and multiple groups of the fixing units are arranged on the spoiler main board (21) along the third direction; The bending directions of the first elastic piece (221) and the second elastic piece (222) in two adjacent groups of the fixing units are opposite, and the bending directions of the first elastic piece (221) and the second elastic piece (222) in the same group of the fixing units are opposite.
8. The heat exchange device for a PTC heater according to claim 1, characterized in that, The elastic limiting member (22) includes a plurality of first elastic pieces (221) and a plurality of second elastic pieces (222). The plurality of first elastic pieces (221) and the plurality of second elastic pieces (222) are alternately connected to the spoiler main board (21) along the third direction, and the bending directions of two adjacent first elastic pieces (221) and second elastic pieces (222) are opposite.
9. The heat exchange device for a PTC heater according to any one of claims 5-8, characterized in that, The heat exchange device for the PTC heater further includes a plurality of heat dissipation fins (3). The plurality of heat dissipation fins (3) are arranged on both sides of the heating pipe fitting (1) along the second direction, and both the first elastic piece (221) and the second elastic piece (222) are pressed against the heat dissipation fins (3) in the corresponding directions.
10. The heat exchange device for a PTC heater according to claim 9, characterized in that, The width of the first elastic piece (221) along the first direction is different from the width of the second elastic piece (222) along the first direction, and the number of the heat dissipation fins (3) pressed by the first elastic piece (221) is different from the number of the heat dissipation fins (3) pressed by the second elastic piece (222).