PTC (Positive Temperature Coefficient) heating device, air supply device and air treatment equipment

Abstract

The utility model discloses a PTC heating device, an air supply device and air treatment equipment, and belongs to the technical field of electric appliances, in the PTC heating device, a plurality of heating units are arranged in a zigzag mode along a fold line track, so that the PTC heating device can be matched with an arc-shaped or curve-shaped air outlet duct, and the PTC heating device can be applied to the air supply device with the curve-shaped air outlet duct. Because each heating unit is arranged on one line segment of the fold line, the heating piece and the heat dissipation piece of each heating unit can roughly extend in the same direction, the curvature difference between the heating piece and the heat dissipation piece is reduced, the problem that a gap is generated between the heating piece and the heat dissipation piece is solved, the attaching degree of the heating piece and the heat dissipation piece is improved, and the service life of the heating piece and the heat dissipation piece is prolonged. The contact area of the heating piece and the heat dissipation piece is increased, and the heating uniformity is improved. Moreover, the plurality of heating units are mutually connected through the connecting assemblies, on one hand, the structural integrity of the heating device is guaranteed, and on the other hand, the overall heating uniformity of the heating device can be improved.

Description

Technical Field

[0001] This application belongs to the field of electrical technology, specifically relating to a PTC heating device, an air supply device, and an air handling equipment. Background Technology

[0002] PTC (Positive Temperature Coefficient) heating elements heat the air flowing near them and are therefore commonly used in air supply devices such as hot air fans and air conditioners to provide hot air. Typically, the shape of the air outlet duct of the air supply device and the PTC heating element are matched, both being manufactured in a straight line to ensure that the PTC heating element can adequately heat the air flowing through the outlet duct. However, some current air supply devices have arc-shaped or other curved outlet duct designs, requiring the PTC heating element to also be curved. This design results in the heat dissipation and heat generation components of the PTC heating element not fitting completely together, leading to uneven heating and affecting the user experience. Utility Model Content

[0003] The purpose of this utility model is to provide a PTC heating device to overcome the technical problem that the heat dissipation component and the heat generation component of the current PTC heating device cannot be completely attached, resulting in uneven heating; another purpose of this application is to provide an air supply device; and a third purpose of this application is to provide an air handling equipment.

[0004] Technical solution: A PTC heating device according to an embodiment of this application includes:

[0005] Multiple heating units are arranged along a zigzag line, with each heating unit corresponding to a segment of the zigzag line. Each heating unit includes a heating element and a heat dissipation element. The heating element extends along the corresponding segment, and the heating elements of two adjacent heating units are spaced apart from each other. The heat dissipation elements are distributed on both sides of the heating element and are in contact with the heating element.

[0006] A connection component is provided, through which multiple heating units are interconnected;

[0007] The broken line is generally arc-shaped or curved.

[0008] In some embodiments, the heat sink includes:

[0009] The first heat sink extends along a direction parallel to the line segment and is attached to the heating element;

[0010] The second heat sink is disposed on the side of the first heat sink away from the heating element. The second heat sink includes a plurality of heat dissipation parts arranged in a direction parallel to the line segment, and the end of each heat dissipation part near the first heat sink is connected to the first heat sink.

[0011] In some embodiments, among the first heat sinks on both sides of the heating element of two adjacent heating units, the first heat sinks located on at least one side are spaced apart from each other.

[0012] In some embodiments, the fold line has opposing convex and concave sides, the number of the first heat sinks located on the convex side corresponds to the number of the heating element, and the first heat sinks located on the convex side are spaced apart from each other.

[0013] In some embodiments, the second heat sink extends and bends along a direction parallel to the line segment to form a plurality of heat dissipation portions, and adjacent heat dissipation portions are connected to each other.

[0014] In some embodiments, the heat sink further includes:

[0015] The third heat sink is disposed on the side of the second heat sink away from the first heat sink, and the end of each heat sink away from the first heat sink is connected to the third heat sink.

[0016] In some embodiments, the heat dissipation element is provided on both sides of the heating element;

[0017] The connection assembly includes a first connector and a second connector, and a plurality of heating units are disposed between the first connector and the second connector. In each heating unit, the heat dissipation component located on one side of the heating element is connected to the first connector, and the heat dissipation component located on the other side of the heating element is connected to the second connector.

[0018] In some embodiments, the first connector includes a plurality of first connecting portions, each of which is attached to one of the heating units; the second connector includes a plurality of second connecting portions, each of which is attached to one of the heating units;

[0019] The distance between two adjacent first connecting parts is L1, and the distance between two adjacent second connecting parts is L2, satisfying: L1 > L2.

[0020] In some embodiments, the PTC heating device further includes a temperature control device;

[0021] The first connecting portion extends in a direction parallel to the line segment, and the temperature control is attached to the side of the first connecting portion away from the heating unit; or, the second connecting portion extends in a direction parallel to the line segment, and the temperature control is attached to the side of the second connecting portion away from the heating unit.

[0022] In some embodiments, the connection assembly further includes a first electrode terminal and a second electrode terminal, wherein the first electrode terminal is connected to the first connector and the second electrode terminal is connected to the second connector;

[0023] In the heat dissipation components on both sides of the heating element of two adjacent heating units, the heat dissipation components located on at least one side are connected to each other;

[0024] The heating element is electrically connected to the first connector and the second connector respectively through the heat dissipation element.

[0025] In some embodiments, the plurality of heating units are arranged in an arc shape.

[0026] Accordingly, the air supply device described in this application embodiment includes:

[0027] The air supply unit is equipped with an air outlet duct;

[0028] And, as described above, the PTC heating device is disposed within the air outlet duct.

[0029] Accordingly, the air handling equipment described in this application includes the air supply device as described above.

[0030] Beneficial Effects: The PTC heating device in this embodiment includes: multiple heating units arranged along a zigzag line, each heating unit corresponding to a segment of the zigzag line; each heating unit includes a heating element and a heat dissipation element, the heating element extending along the corresponding segment, with the heating elements of adjacent heating units spaced apart, and the heat dissipation elements distributed on both sides of the heating element and in contact with it; a connecting assembly, through which the multiple heating units are interconnected; the zigzag line is generally arc-shaped or curved. In this embodiment, the multiple heating units of the PTC heating device are arranged zigzagly along the trajectory of the zigzag line, and the zigzag line is generally arc-shaped or curved, thereby matching arc-shaped or curved air outlet ducts and being applicable to air supply devices with arc-shaped or curved air outlet ducts. Because each heating unit is positioned on a segment of the zigzag line, the heating element and heat sink of each unit can extend approximately in the same direction. This reduces the curvature difference between the heating and heat sinks, mitigating gaps and improving their fit and contact area, thus enhancing heating uniformity. Furthermore, connecting multiple heating units with connecting components ensures the structural integrity of the PTC heating device and improves overall heating uniformity.

[0031] The air supply device of this application embodiment includes an air supply component and the aforementioned PTC heating device, wherein the PTC heating device is disposed within the air outlet duct of the air supply component. This air supply device can include all the technical features and beneficial effects of the aforementioned PTC heating device; in particular, the PTC heating device can improve the uniformity of the air supply temperature of the air supply device.

[0032] The air handling equipment of this application includes all the technical features and beneficial effects of the above-described air supply device, which will not be repeated here. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the main structure of a PTC heating device provided in some embodiments of this application;

[0035] Figure 2 for Figure 1 A magnified schematic diagram of a portion of region A in the middle;

[0036] Figure 3A three-dimensional structural schematic diagram of a PTC heating device provided in some embodiments of this application;

[0037] Figure 4 for Figure 3 A magnified schematic diagram of a portion of region B in the middle;

[0038] Figure 5 A three-dimensional structural schematic diagram of a PTC heating device provided in some embodiments of this application from another perspective;

[0039] Figure 6 A partial structural schematic diagram of a PTC heating device provided in other embodiments of this application;

[0040] Figure 7 A partial structural schematic diagram of a PTC heating device provided in other embodiments of this application;

[0041] Figure 8 This is a partial structural schematic diagram of an air supply device provided in some embodiments of this application;

[0042] Reference numerals: 10-Air supply device; 100-PTC heating element; 101-Protruding side; 102-Recessed side; 110-Heating unit; 111-Heating element; 112-Heat dissipation element; 1121-First heat sink; 1122-Second heat sink; 1123-Third heat sink; 1124-Heat dissipation section; 120-Connecting assembly; 121-First connector; 1211-First connecting section; 1212-Third connecting section; 122-Second connector; 1221-Second connecting section; 123-First electrode terminal; 124-Second electrode terminal; 130-Temperature control device; 200-Air supply assembly; 210-Air outlet duct; Z-Bent line; Z'-Line segment. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. "A plurality of" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium; they can be the internal communication of two devices or the interaction relationship between two devices, unless otherwise explicitly specified. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0045] As a preface to this application, we first introduce PTC heating devices in related technologies: PTC is an abbreviation for Positive Temperature Coefficient. PTC heating devices are typically made of PTC material, which has special resistance-temperature characteristics, meaning that within a certain temperature range, its resistance increases with increasing temperature. When a PTC heating device is energized, current flows through the PTC material, causing heating within the material. As the temperature rises, the resistance of the PTC material also increases, leading to a decrease in current and thus limiting the rate of temperature rise of the PTC heating device. This characteristic gives PTC heating devices a self-stabilizing feature, enabling them to automatically adjust the heating power within a certain temperature range. Typically, PTC heating devices consist of a ceramic plate (the PTC heating material) and a heat dissipation component. The heating surface of the ceramic plate is flat, and the heat dissipation component is generally made into a straight structure to fully fit the ceramic plate and ensure temperature uniformity. For some air supply devices with curved air outlet ducts, in order to ensure that the air flowing through the air outlet duct is heated uniformly, the shape of the PTC heating device needs to match the air outlet duct, meaning the heat dissipation component is also curved. This design results in gaps between the heat dissipation components and the ceramic plate, preventing them from fitting together properly. Consequently, the heat generated by the ceramic plate cannot be evenly conducted to the heat dissipation components, leading to uneven heating.

[0046] In view of this, please refer to the following: Figures 1 to 8This application provides a PTC heating device 100, which can be applied to an air supply device 10 having a curved air outlet duct 210 and has good heating temperature uniformity. It is understood that the PTC heating device 100 in this application embodiment can be a heating device made of PTC material.

[0047] Please see Figure 1 and Figure 2 The PTC heating device 100 in this application embodiment includes a plurality of heating units 110 and a connecting component 120.

[0048] Multiple heating units 110 are arranged along the zigzag line Z, with each heating unit 110 correspondingly disposed on a line segment Z' of the zigzag line Z. The heating unit 110 includes a heating element 111 and a heat dissipation element 112. The heating element 111 extends along the corresponding line segment Z', and the heating elements 111 of two adjacent heating units 110 are spaced apart from each other. The heat dissipation element 112 is distributed on both sides of the heating element 111 and is in contact with the heating element 111.

[0049] In this context, the broken line Z refers to a zigzag line composed of multiple line segments Z' connected end-to-end sequentially. In the PTC heating device 100 of this application embodiment, the broken line Z and its line segments Z' are not directly observable physical structures, but rather virtual curves fitted based on the arrangement of multiple heating units 110 in the PTC heating device 100. Specifically, the broken line Z, composed of multiple virtual line segments Z' connected end-to-end sequentially, can be fitted along the arrangement trajectory of the multiple heating units 110 and the extension direction of the heating element 111 of each heating unit 110. Figure 1 and Figure 2 In the diagram, dashed lines Z and Z' represent the broken line Z and its segment Z', respectively.

[0050] It should be noted that the polygonal line Z in this embodiment is generally arc-shaped or curved. An arc is a shape composed of a segment of an arc, which is a portion of a circle. A curved shape differs from an arc; it is composed of multiple curve segments, which can be arcs, Bézier curves, or other types of curves, and the curvature of these segments may differ at different locations. The arc and curved shapes do not need to be standard and smooth; they only need to roughly resemble an arc or curve.

[0051] In some embodiments, the heating element 111 may include a ceramic plate made of PTC material, which can generate heat when energized. The heat sink 112 is in contact with the heating element 111 and can dissipate the heat generated by the heating element 111. The heat sink 112 may be a heat dissipation corrugated sheet or other heat dissipation structure, and may be made of materials with good thermal conductivity such as aluminum or copper.

[0052] The connecting component 120 is used to connect multiple heating units 110 in series. The multiple heating units 110 are interconnected through the connecting component 120 to form an overall structure.

[0053] In other words, the multiple heating units 110 of the PTC heating device 100 in this embodiment are arranged in a zigzag pattern along the Z-shaped curve, so that their shape can match the curved air outlet duct 210. The air delivered through the air outlet duct 210 can flow through the PTC heating device 100 and be heated by it. Therefore, the PTC heating device 100 can be applied to an air supply device 10 with a curved air outlet duct 210. Because each heating unit 110 is disposed on a line segment Z' of the Z-shaped curve, the heating element 111 and the heat dissipation element 112 of each heating unit 110 can extend approximately in the same direction, that is, both can extend in a direction parallel to the line segment Z', and can both be made into a generally straight structure. This helps to reduce the curvature difference between the heating element 111 and the heat sink 112, alleviate the problem of gaps between them, improve the fit between them, increase their contact area, promote heat conduction, and enhance the uniformity of heating. Furthermore, by connecting multiple heating units 110 together via the connecting component 120, the structural integrity and stability of the PTC heating device 100 are ensured. Additionally, the heat conduction between the multiple heating units 110 via the connecting component 120 improves the overall heating uniformity of the PTC heating device 100.

[0054] Each heating unit 110 can be configured as follows: Figure 1 The outline shown is roughly rectangular, with multiple heating units 110 arranged along the Z-line and connected together by a connecting component 120. By changing the number of heating units 110 and the length of each heating unit 110 in the direction of the corresponding line segment Z', the degree of matching between the overall shape of the PTC heating device 100 and the shape of the air outlet duct 210 can be changed. The more heating units 110 there are, the smaller the length of each heating unit 110, and the smoother the transition of the Z-line of the arrangement of multiple heating units 110, the better the shape of the air outlet duct 210 can be matched.

[0055] Please refer to the following: Figure 3 and Figure 4In some embodiments, the heat sink 112 includes a first heat sink 1121 and a second heat sink 1122. The first heat sink 1121 extends along a direction parallel to line segment Z' and is attached to the heating element 111. The second heat sink 1122 is disposed on the side of the first heat sink 1121 away from the heating element 111. The second heat sink 1122 includes a plurality of heat dissipation portions 1124 arranged in a direction parallel to line segment Z'. The end of each heat dissipation portion 1124 near the first heat sink 1121 is connected to the first heat sink 1121.

[0056] By including a first heat sink 1121 in the structure of the heat sink 112, and setting the first heat sink 1121 to extend along a direction parallel to line segment Z', the first heat sink 1121 is approximately parallel to the heating element 111. This allows the first heat sink 1121 to fit more tightly against the side of the heating element 111, and the heat generated by the heating element 111 can be more evenly conducted to the first heat sink 1121 through its side. Connecting the heat dissipation portion 1124 of the second heat sink 1122 near the first heat sink 1121 to the first heat sink 1121 allows a portion of the heat received by the first heat sink 1121 to be directly conducted to the heat dissipation portion 1124, increasing the outward diffusion area. Furthermore, by arranging the multiple heat dissipation parts 1124 of the second heat sink 1122 along a direction parallel to line segment Z', on the one hand, the multiple heat dissipation parts 1124 can be more evenly distributed on the first heat sink 1121, improving the uniformity of heat conduction; on the other hand, it can increase the contact area between the second heat sink 1122 and the air, allowing the flowing air to come into more full contact with the heat dissipation structure, increasing the uniformity and efficiency of heating; in addition, the arrangement of the multiple heat dissipation parts 1124 allows airflow channels to be formed between adjacent heat dissipation parts 1124, so that the airflow of the air outlet duct 210 can flow smoothly through the airflow channels, improving the air temperature while effectively reducing the air supply resistance and improving the air supply efficiency.

[0057] It should be noted that in the description of this application, "parallel" can refer to complete parallelism or near-complete parallelism. For example, a range of ±10° within which they are completely parallel is considered "parallel" as described in this application. The direction parallel to line segment Z' means that the extension direction or arrangement direction does not intersect with line segment Z'. The first heat sink 1121 extending along a direction parallel to line segment Z' means that the first heat sink 1121 is at least parallel to line segment Z' on the side facing the heating element 111. Here, line segment Z' refers to the line segment corresponding to the heating unit 110, and each heating unit 110 has a corresponding line segment Z'. Each heating unit 110 is disposed on its corresponding line segment Z', and the heating element 111 of the heating unit 110 extends along line segment Z'.

[0058] Optionally, the plurality of heat dissipation portions 1124 of the second heat sink 1122 can be arranged in a parallel manner, or the opposite sides of any two heat dissipation portions 1124 can be at an angle.

[0059] In some embodiments, among the first heat sinks 1121 on both sides of the heating element 111 of two adjacent heating units 110, the first heat sinks 1121 located on at least one side are spaced apart from each other. This reduces the extension length of the first heat sink 1121, allowing it to roughly correspond to the heating element 111, and making it easier to make them roughly parallel, thus improving the fit between the first heat sink 1121 and the heating element 111.

[0060] Optionally, please refer to Figure 2 The zigzag line Z has a convex side 101 and a concave side 102. The zigzag line Z is convex on its convex side 101 and concave on its concave side 102. The number of first heat sinks 1121 located on the convex side 101 corresponds to the number of heating elements 111, and the first heat sinks 1121 located on the convex side 101 are spaced apart from each other. In this way, the first heat sinks 1121 on the convex side 101 can be made shorter, which makes it easier to keep the first heat sinks 1121 and the heating elements 111 approximately parallel, further improving the fit between the first heat sinks 1121 and the heating elements 111.

[0061] Optionally, the number of first heat sinks 1121 located on the recessed side 102 corresponds to the number of heating elements 111, and the first heat sinks 1121 located on the recessed side 102 are spaced apart from each other, which further improves the fit between the first heat sinks 1121 on both sides and the heating elements 111.

[0062] Please refer to them again. Figures 1 to 4 In some embodiments, the second heat sink 1122 extends and bends along a direction parallel to line segment Z' to form multiple heat dissipation sections 1124, with adjacent heat dissipation sections 1124 interconnected. That is, the second heat sink 1122 is a single-piece structure, bent to form multiple heat dissipation sections 1124 connected end-to-end, with each heat dissipation section 1124 connected to the first heat sink 1121 at its end closest to the first heat sink 1121. The multiple heat dissipation sections 1124 form a single-piece second heat sink 1122, allowing heat to be conducted between the multiple heat dissipation sections 1124, improving temperature uniformity. Furthermore, by bending the second heat sink 1122 into multiple heat dissipation sections 1124 connected end-to-end, the number of heat dissipation sections 1124 can be increased within a unit volume space, increasing the contact area with air and improving heating efficiency.

[0063] Please refer to them again. Figure 3 and Figure 4In some embodiments, the heat sink 112 further includes a third heat sink 1123, disposed on the side of the second heat sink 1122 away from the first heat sink 1121, and the end of each heat dissipation part 1124 away from the first heat sink 1121 is connected to the third heat sink 1123. By providing the third heat sink 1123, on the one hand, the contact area between the heat sink 112 and the air can be further increased, improving the heat conduction efficiency and the heating effect; on the other hand, the third heat sink 1123 and the first heat sink 1121 can be fixed on both sides of the second heat sink 1122 respectively, improving the structural strength of the heat sink 112 and ensuring the overall structural stability.

[0064] Please refer to the following: Figures 1 to 5 In some embodiments, heat sinks 112 are provided on both sides of the heating element 111. By providing heat sinks 112 on both sides of the heating element 111, the heat dissipation area is further increased, thereby improving the heating efficiency of the PTC heating device. The heat sinks 112 can adopt the structure of any of the above embodiments, which will not be described in detail here.

[0065] In the above embodiment, the connecting component 120 includes a first connector 121 and a second connector 122. Multiple heating units 110 are disposed between the first connector 121 and the second connector 122. That is, the first connector 121 and the second connector 122 are respectively disposed on both sides of the multiple heating units 110 and are respectively connected to the multiple heating units 110. Specifically, in each heating unit 110, the heat sink 112 located on one side of the heating element 111 is connected to the first connector 121, and the heat sink 112 located on the other side of the heating element 111 is connected to the second connector 122. By respectively providing the first connector 121 and the second connector 122 on both sides of the multiple heating units 110, the heat sinks 112 of the multiple heating units 110 located on the same side of their respective heating elements 111 can be connected together using the first connector 121, and the heat sinks 112 of the multiple heating units 110 located on the other side of their respective heating elements 111 can be connected together using the second connector 122, thereby improving the overall structural strength of the PTC heating device. Furthermore, the first connector 121 and the second connector 122 can be used to conduct heat between multiple heating units 110, thereby improving the heat uniformity among the multiple heating units 110. In addition, the first connector 121 and the second connector 122 can further increase the heat diffusion area and improve the heating efficiency.

[0066] In some embodiments, the first connector 121 and the second connector 122 can also serve as conductive components for transmitting current. The heating element 111 is electrically connected to the first connector 121 and the second connector 122 respectively through the heat sink 112. The connection assembly 120 also includes a first electrode terminal 123 and a second electrode terminal 124. The first electrode terminal 123 is connected to the first connector 121, and the second electrode terminal 124 is connected to the second connector 122. The first electrode terminal 123 and the second electrode terminal 124 can be connected to a circuit. When the circuit is turned on, current is introduced into the heating element 111 through the first electrode terminal 123, the second electrode terminal 124, the first connector 121, the second connector 122, and the heat sinks 112 on both sides of the heating element 111, causing the heating element 111 to generate heat. Among the heat sinks 112 on both sides of the heating element 111 of two adjacent heating units 110, the heat sinks 112 located on at least one side are interconnected, so that current can be transmitted between adjacent heating units 110 through the interconnected heat sinks 112. Optionally, the second heat sinks 1122 of at least one side of the heat sink 112 are interconnected to facilitate current transfer between adjacent heat-generating units 110.

[0067] Please refer to the following: Figure 4 and Figure 5 In some embodiments, the first connector 121 includes a plurality of first connecting portions 1211, each first connecting portion 1211 being attached to a heating unit 110; the second connector 122 includes a plurality of second connecting portions 1221, each second connecting portion 1221 being attached to a heating unit 110; the distance between two adjacent first connecting portions 1211 is L1, and the distance between two adjacent second connecting portions 1221 is L2, satisfying: L1 > L2. That is, the spacing on one side of two adjacent heating units 110 is wider than the spacing on the other side, so that they respectively correspond to different line segments Z' of the broken line Z. For multiple heating units 110, the arranged broken line Z forms multiple connected sides of a polygon, which can better adapt to the shape of the air outlet duct 210.

[0068] The portion of the first connector 121 that is in close contact with the heating unit 110 is defined as the first connecting part 1211, and the portion of the second connector 122 that is in close contact with the heating unit 110 is defined as the second connecting part 1221. The distance L1 between adjacent first connecting parts 1211 and the distance L2 between adjacent second connecting parts 1221 can be measured by conventional measuring tools such as rulers, vernier calipers, and micrometers, or by directly observing and comparing their sizes.

[0069] Optionally, two adjacent first connecting portions 1211 are connected by a third connecting portion 1212, where L1 can be the length of the third connecting portion 1212. Correspondingly, two adjacent second connecting portions 1221 are connected by a fourth connecting portion, where L2 can be the length of the fourth connecting portion. Alternatively, in some embodiments, two adjacent second connecting portions 1221 are directly connected, and L2 can be equal to 0.

[0070] Please refer to the following: Figure 6 and Figure 7 In some embodiments, the PTC heating device 100 further includes a temperature control 130 for controlling the temperature of the heating unit 110. The first connecting portion 1211 extends along a direction parallel to line segment Z', and the temperature control 130 is attached to the side of the first connecting portion 1211 away from the heating unit 110; or, the second connecting portion 1221 extends along a direction parallel to line segment Z', and the temperature control 130 is attached to the side of the second connecting portion 1221 away from the heating unit 110. Because the first connecting portion 1211 or the second connecting portion 1221 extends along a direction parallel to line segment Z', i.e., the first connecting portion 1211 or the second connecting portion 1221 has a relatively flat surface, the temperature control 130 can be directly mounted on one of the flat surfaces and maintain assembly stability. Compared to the assembly structure that requires additional temperature control on curved surfaces, this embodiment installs the temperature control 130 on a relatively flat surface without the need for additional assembly structure, reducing the number of parts, decreasing the overall size, and improving the assembly efficiency and temperature control accuracy of the temperature control 130 to a certain extent.

[0071] Accordingly, this application also provides an air supply device 10, which can be an air supply structure for electrical appliances such as fans, air conditioners, and air purifiers. Figure 8 As shown, the air supply device 10 includes an air supply assembly 200 and a PTC heating element 100 from any of the above embodiments. The air supply assembly 200 is provided with an air outlet duct 210, and the PTC heating element 100 is disposed within the air outlet duct 210. The air outlet duct 210 can be an arc shape, a circle, or other curved shape. The PTC heating element 100 of this embodiment can adapt to the shape of the air outlet duct 210, thereby improving the uniformity of the air supply temperature and the heating efficiency.

[0072] Accordingly, this application also provides an air handling device that can be used to purify air and includes the aforementioned air supply device 10, thereby also providing a fan function for the user. This air handling device includes all the technical features and beneficial effects of the aforementioned air supply device, which will not be repeated here.

[0073] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0074] The PTC heating device 100, air supply device 10, and air handling equipment provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A PTC heating device, characterized in that, include: Multiple heating units are arranged along a zigzag line, with each heating unit corresponding to a segment of the zigzag line. Each heating unit includes a heating element and a heat dissipation element. The heating element extends along the corresponding segment, and the heating elements of two adjacent heating units are spaced apart from each other. The heat dissipation elements are distributed on both sides of the heating element and are in contact with the heating element. A connection component is provided, through which multiple heating units are interconnected; The broken line is generally arc-shaped or curved.

2. The PTC heating device according to claim 1, characterized in that, The heat sink includes: The first heat sink extends along a direction parallel to the line segment and is attached to the heating element; The second heat sink is disposed on the side of the first heat sink away from the heating element. The second heat sink includes a plurality of heat dissipation parts arranged in a direction parallel to the line segment, and the end of each heat dissipation part near the first heat sink is connected to the first heat sink.

3. The PTC heating device according to claim 2, characterized in that, In the first heat sinks on both sides of the heating element of two adjacent heating units, the first heat sinks located on at least one side are spaced apart from each other.

4. The PTC heating device according to claim 3, characterized in that, The fold line has opposing convex and concave sides, the number of the first heat sinks on the convex side corresponds to the number of the heating element, and the first heat sinks on the convex side are spaced apart from each other.

5. The PTC heating device according to claim 2, characterized in that, The second heat sink extends and bends along a direction parallel to the line segment to form a plurality of heat dissipation sections, and adjacent heat dissipation sections are connected to each other.

6. The PTC heating device according to claim 2, characterized in that, The heat sink also includes: The third heat sink is disposed on the side of the second heat sink away from the first heat sink, and the end of each heat sink away from the first heat sink is connected to the third heat sink.

7. The PTC heating device according to any one of claims 1 to 6, characterized in that, The heat dissipation element is provided on both sides of the heating element; The connection assembly includes a first connector and a second connector, and a plurality of heating units are disposed between the first connector and the second connector. In each heating unit, the heat dissipation component located on one side of the heating element is connected to the first connector, and the heat dissipation component located on the other side of the heating element is connected to the second connector.

8. The PTC heating device according to claim 7, characterized in that, The first connector includes a plurality of first connecting portions, each of which is attached to one of the heating units; the second connector includes a plurality of second connecting portions, each of which is attached to one of the heating units. The distance between two adjacent first connecting parts is L1, and the distance between two adjacent second connecting parts is L2, satisfying: L1 > L2.

9. The PTC heating device according to claim 8, characterized in that, The PTC heating device also includes a temperature control device; The first connecting portion extends in a direction parallel to the line segment, and the temperature control is attached to the side of the first connecting portion away from the heating unit; or, the second connecting portion extends in a direction parallel to the line segment, and the temperature control is attached to the side of the second connecting portion away from the heating unit.

10. The PTC heating device according to claim 7, characterized in that, The connection assembly further includes a first electrode terminal and a second electrode terminal, wherein the first electrode terminal is connected to the first connector and the second electrode terminal is connected to the second connector; In the heat dissipation components on both sides of the heating element of two adjacent heating units, the heat dissipation components located on at least one side are connected to each other; The heating element is electrically connected to the first connector and the second connector respectively through the heat dissipation element.

11. An air supply device, characterized in that, include: The air supply unit is equipped with an air outlet duct; And, as described in any one of claims 1 to 10, the PTC heating device is disposed within the air outlet duct.

12. An air handling device, characterized in that, Includes the air supply device as described in claim 11.

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