PTC heating sheet and warmer

Abstract

The utility model discloses a kind of PTC heating sheet and warmer, PTC heating sheet includes: electrode assembly and at least one PTC element, electrode assembly includes first electrode sheet and second electrode sheet, first electrode sheet and second electrode sheet are spaced apart in first direction, first electrode sheet and second electrode sheet cooperate to define at least one convex part, in first direction, the thickness of convex part is greater than the thickness of the rest of electrode assembly, each PTC element is located between first electrode sheet and second electrode sheet, PTC element is located in convex part. By making first electrode sheet and second electrode sheet cooperate to define the convex part for installing PTC element, it is favorable to reduce the thickness of the part of PTC heating sheet except convex part, to reduce the thickness size of PTC heating sheet, it is favorable to reduce the wind resistance generated by PTC heating sheet, reduce the noise generated when airflow flows through PTC heating sheet.

Description

Technical Field

[0001] This utility model relates to the field of PTC heating element technology, and in particular to a PTC heating element and a heater. Background Technology

[0002] In related technologies, the size of PTC (Positive Temperature Coefficient) heating elements is too large, resulting in a large space required for installation and affecting the ease of assembly. At the same time, it causes the PTC heating elements to generate large air resistance when air flows through them, affecting the heat exchange efficiency and generating significant noise. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a PTC heating element with a small thickness, which helps to reduce its resistance to airflow.

[0004] A PTC heating element according to an embodiment of the present invention includes: an electrode assembly comprising a first electrode sheet and a second electrode sheet, the first electrode sheet and the second electrode sheet being insulated from each other and spaced apart in a first direction, the first electrode sheet and the second electrode sheet cooperating to define at least one protrusion, wherein in the first direction, at least a portion of the thickness of the protrusion is greater than the thickness of the electrode assembly at a position adjacent to the protrusion; at least one PTC element, each PTC element being disposed between the first electrode sheet and the second electrode sheet, each PTC element being electrically connected to the first electrode sheet and the second electrode sheet respectively, and at least one PTC element being disposed within the protrusion.

[0005] According to the embodiments of the present invention, the PTC heating element, by having the first electrode plate and the second electrode plate cooperate to define the protrusion for mounting the PTC element, is advantageous in reducing the thickness of the portion of the PTC heating element other than the protrusion, thereby reducing the thickness of the PTC heating element, reducing the space required to arrange the PTC heating element, and also reducing the wind resistance generated by the PTC heating element, improving the heat exchange efficiency between the airflow and the PTC heating element, and reducing the noise generated when the airflow passes through the PTC heating element. In addition, by insulating the first electrode plate and the second electrode plate, the risk of short circuit in the electrode assembly is reduced.

[0006] According to some embodiments of the present invention, the electrode assembly has a plurality of protrusions, the plurality of protrusions are spaced apart in a second direction, and each protrusion is provided with at least one PTC element, wherein the first direction and the second direction intersect.

[0007] According to some embodiments of the present invention, a plurality of the protrusions are evenly spaced in the second direction.

[0008] According to some embodiments of the present invention, the PTC heating element further includes an insulating member extending along the second direction. The insulating member is disposed between the first electrode sheet and the second electrode sheet, and the insulating member is provided with a plurality of clearance through holes. The plurality of clearance through holes are provided in a one-to-one correspondence with the plurality of protrusions, and the PTC element is disposed in each clearance through hole.

[0009] According to some embodiments of the present invention, each of the protrusions is located in the middle of the electrode assembly in a third direction, and the third direction is respectively perpendicular to the first direction and the second direction.

[0010] According to some embodiments of the present invention, a portion of each of the first electrode sheet and the second electrode sheet protrudes outward to define a protrusion groove, and the protrusion portion is defined by the protrusion groove disposed opposite to each other in the first direction.

[0011] According to some embodiments of the present invention, the thickness C1 of the first electrode sheet ranges from 0.5 mm to 1 mm, and the thickness C1 of the second electrode sheet ranges from 0.5 mm to 1 mm.

[0012] According to some embodiments of the present invention, in the first direction, the thickness B of the protrusion ranges from 1.8 mm to 3.5 mm.

[0013] According to some embodiments of the present invention, in the first direction, the minimum distance between the first electrode sheet and the second electrode sheet is A, where B > A ≥ 1 mm.

[0014] The second objective of this invention is to provide a heater.

[0015] The heater according to an embodiment of the present invention includes a PTC heating element, wherein the PTC heating element is the aforementioned PTC heating element.

[0016] The heater described above has the same advantages as the PTC heating element, which will not be repeated here.

[0017] According to some embodiments of the present invention, the heater includes: a housing, the housing having an air inlet and an air outlet; a fan assembly, the fan assembly being disposed inside the housing and located between the air inlet and the air outlet; and a plurality of PTC heating elements, the plurality of PTC heating elements being spaced apart in the first direction to define a heating assembly, the heating assembly being disposed inside the housing and adjacent to the air outlet.

[0018] According to some embodiments of the present invention, in the first direction, an airflow channel is defined between adjacent PTC heating elements, the airflow channel extending in the direction from the impeller assembly to the air outlet.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of the PCT heating element described in an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Sectional view at PP;

[0023] Figure 3 for Figure 1 Enlarged view of point Q;

[0024] Figure 4 This is an exploded view of the PCT heating element described in an embodiment of this utility model;

[0025] Figure 5 This is a cross-sectional view of the heater described in an embodiment of the present invention.

[0026] Figure label:

[0027] PTC heating element 100

[0028] Electrode assembly 10, first electrode sheet 11, first terminal 111

[0029] Second electrode plate 12, second terminal 121

[0030] Protrusion 13, Protrusion groove 14

[0031] PTC component 20

[0032] Insulating component 30, clearance through hole 31

[0033] Heater 200

[0034] Housing 210, air inlet 211, air outlet 213, air outlet grille 214

[0035] Wind turbine assembly 220

[0036] Air duct assembly 230, air duct 231. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the terms "width," "thickness," "upper," "lower," "inner," "outer," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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 utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] The following is for reference. Figures 1-4 A PTC heating element 100 according to an embodiment of the present invention is described.

[0041] Combination Figures 1 to 4According to an embodiment of the present invention, a PTC heating element 100 includes an electrode assembly 10 and at least one PTC element 20. The electrode assembly 10 includes a first electrode sheet 11 and a second electrode sheet 12, which are insulated from each other and are spaced apart in a first direction. The first electrode sheet 11 and the second electrode sheet 12 cooperate to define at least one protrusion 13. In the first direction, at least a portion of the thickness of the protrusion 13 is greater than the thickness of the electrode assembly 10 at a position adjacent to the protrusion 13. Each PTC element 20 is disposed between the first electrode sheet 11 and the second electrode sheet 12, and each PTC element 20 is electrically connected to the first electrode sheet 11 and the second electrode sheet 12 respectively. At least one PTC element 20 is disposed within the protrusion 13.

[0042] It should be noted that "first direction" can be understood as the thickness direction of the PTC heating element 100. A specific direction diagram can be found in [reference needed]. Figures 2 to 4 As shown.

[0043] For example, the protrusion 13 may be a cavity defined by the cooperation of the first electrode plate 11 and the second electrode plate 12, which protrudes in a direction away from each other. For instance, a portion of the first electrode plate 11 may protrude in a direction away from the second electrode plate 12 and cooperate with the second electrode plate 12 to define the protrusion 13; or a portion of the second electrode plate 12 may protrude in a direction away from the first electrode plate 11 and cooperate with the first electrode plate 11 to define the protrusion 13. The protrusion 13 is used for positioning and mounting the PTC element 20. At least one PTC element 20 is disposed in the protrusion 13, which helps to improve the convenience of positioning and mounting the PTC element 20.

[0044] In the first direction, at least a portion of the protrusion 13 has a thickness greater than the thickness of the electrode assembly 10 at a location adjacent to the protrusion 13. For example, the thickness of one of the protrusions 13 may be greater than the thickness of the electrode assembly 10 at a location adjacent to the protrusion 13, or the thickness of each of the protrusions 13 may be greater than the thickness of the portion of the electrode assembly 10 excluding the portion forming the protrusion 13, so that at least a portion of the thickness of the electrode assembly 10 is smaller than the thickness of the protrusion 13. This improves the ease of installation of the PTC element 20 while reducing the thickness of the electrode assembly 10, thereby reducing the thickness of the PTC heating element 100.

[0045] Each PTC element 20 is electrically connected to the first electrode plate 11 and the second electrode plate 12 respectively. The first electrode plate 11 and the second electrode plate 12 can be used as conductive media to be electrically connected to an external power source. When the external power source is turned on, current can flow into the PTC element 20. The PTC element 20 can generate heat after being energized, thereby realizing the heating function of the PTC heating element 100. In addition, the first electrode plate 11 and the second electrode plate 12 can also play a role in transferring the heat generated by the PTC element 20, which is beneficial to increasing the heating area of ​​the PTC heating element 100, thereby improving the heating efficiency and heating uniformity of the PTC heating element 100.

[0046] In order to prevent the electrode assembly 10 from short-circuiting due to contact between the first electrode sheet 11 and the second electrode sheet 12, a component for insulating the first electrode sheet 11 and the second electrode sheet 12 can be provided between them. Alternatively, other methods can be used to achieve insulation between the first electrode sheet 11 and the second electrode sheet 12, such as increasing the distance between the first electrode sheet 11 and the second electrode sheet 12.

[0047] It is understandable that the specific method of achieving insulation between the first electrode plate 11 and the second electrode plate 12 can be determined according to actual production requirements, and no specific limitation is made here.

[0048] In related technologies, the excessive thickness of PTC heating elements results in a large space required for installation, affecting the ease of assembly. Furthermore, the excessive thickness of the PTC heating elements leads to high airflow resistance, impacting heat exchange efficiency and generating significant noise.

[0049] This application defines a protrusion 13 for mounting the PTC element 20 by having the first electrode plate 11 and the second electrode plate 12 cooperate. This helps to reduce the thickness of the portion of the PTC heating element 100 other than the protrusion 13, reduce the space required to arrange the PTC heating element 100, reduce the wind resistance generated by the PTC heating element 100, improve the heat exchange efficiency between the airflow and the PTC heating element 100, and reduce the noise generated when the airflow passes through the PTC heating element 100. In addition, by insulating the first electrode plate 11 and the second electrode plate 12, the risk of short circuit in the electrode assembly 10 is reduced.

[0050] In some examples, the PTC element 20 is constructed of ceramic material, and the PTC heating element 100 can achieve self-temperature control, which helps to improve the reliability of the PTC heating element 100.

[0051] Combination Figures 1 to 4In some embodiments of the present invention, the electrode assembly 10 has a plurality of protrusions 13, which are spaced apart in a second direction. Each protrusion 13 is provided with at least one PTC element 20, and the first and second directions intersect.

[0052] It should be noted that "second direction" can be understood as the height direction of the PTC heating element 100. A specific direction diagram can be found in [reference needed]. Figures 1 to 4 As shown.

[0053] By arranging multiple protrusions 13 at intervals in the second direction, and each protrusion 13 having at least one PTC element 20, it is beneficial to reduce the size of the portion of the PTC heating element 100 other than the portion with protrusions 13 and PTC element 20 in the first direction. This reduces the space required to arrange the PTC heating element 100, reduces the resistance of the PTC heating element 100 to airflow, improves the heat exchange effect between the airflow and the PTC heating element 100, and reduces the noise generated when the airflow passes through the PTC heating element 100.

[0054] In some examples, each protrusion 13 is provided with a corresponding PTC element 20, that is, each protrusion 13 is provided with a PTC element 20, so as to facilitate the positioning and installation of the PTC element 20 and to facilitate the rapid monitoring of the working status of each PTC element 20; in other examples, each protrusion 13 may be provided with two PTC elements 20, and the two PTC elements 20 may be arranged in the first direction, which helps to reduce the number of protrusions 13 processed on the electrode assembly 10, thereby simplifying the processing steps of the electrode assembly 10 and improving the production efficiency of the electrode assembly 10.

[0055] It is understandable that the number of protrusions 13 provided on the electrode assembly 10, and the number of PTC elements 20 provided for each protrusion 13, can be determined according to actual production requirements, and no specific limitation is made here.

[0056] Combination Figures 1 to 4 In some embodiments of this utility model, a plurality of protrusions 13 are evenly spaced in the second direction.

[0057] By arranging multiple protrusions 13 at intervals in the second direction, it is beneficial to improve the structural stability and structural strength of the electrode assembly 10. Furthermore, since PTC elements 20 are disposed within the protrusions 13, by arranging the protrusions 13 at uniform intervals in the second direction, it is possible to achieve uniform intervals of PTC elements 20 in the second direction. This is beneficial to improve the uniformity of heat diffusion along the second direction on the electrode assembly 10 generated by the PTC elements 20, thereby improving the heating uniformity of the PTC heating element 100.

[0058] Combination Figure 2 and Figure 4 As shown, in some embodiments of the present invention, the PTC heating element 100 further includes an insulating member 30 extending along the second direction. The insulating member 30 is disposed between the first electrode sheet 11 and the second electrode sheet 12, and the insulating member 30 is provided with a plurality of clearance through holes 31. The plurality of clearance through holes 31 are provided in a one-to-one correspondence with a plurality of protrusions 13, and a PTC element 20 is provided in each clearance through hole 31.

[0059] For example, the first electrode plate 11 and the second electrode plate 12 both extend along the second direction, and the first electrode plate 11 and the second electrode plate 12 cooperate to define a plurality of protrusions 13 spaced apart along the second direction. The insulating member 30 is disposed between the first electrode plate 11 and the second electrode plate 12 and extends along the second direction. The insulating member 30 is provided with a plurality of clearance through holes 31 that penetrate the insulating member 30 along the first direction, and the plurality of clearance through holes 31 are corresponding one-to-one with the plurality of protrusions 13. The PTC element 20 can be embedded in the clearance through holes 31 to realize the positioning and installation of the PTC element 20 on the protrusion 13. At the same time, the insulating member 30 can be arranged around the PTC element 20 along the circumferential direction of the PTC element 20, which helps to improve the sealing performance inside the protrusion 13 and prevent the PTC heating element 100 from short-circuiting or affecting the heat dissipation of the PTC heating element 100 due to the entry of dust or water and other debris into the PTC heating element 100.

[0060] In some embodiments of this utility model, the PTC element 20 and the insulating element 30 are fixedly connected to the first electrode plate 11 and the second electrode plate 12, respectively.

[0061] In some examples, the insulating element 30 is constructed as a ceramic sheet. Ceramic materials have good insulation, high temperature resistance, and thermal conductivity, thereby improving the performance of the insulating element 30 and enhancing its support effect on the PTC element 20. The ceramic sheet is provided with a clearance through hole 31, in which the PTC element 20 is embedded and fixedly connected to the insulating element 30 with insulating adhesive, thereby improving the reliability of the fit between the PTC element 20 and the insulating element 30. The PTC element 20 and the insulating element 30 are fixedly connected to the first electrode sheet 11 and the second electrode sheet 12 respectively with high-temperature adhesive, thereby improving the connection reliability between the PTC element 20, the insulating element 30, the first electrode sheet 11, and the second electrode sheet 12. Furthermore, the protrusion 13 can be formed into a sealed cavity, reducing the risk of dust or rainwater and other debris entering the PTC heating element 100, improving the service life and safety of the PTC heating element 100, and enhancing the structural strength of the PTC heating element 100.

[0062] In other examples, the insulating element 30 is constructed as insulating adhesive. The PTC element 20 is bonded to the first electrode sheet 11 and the second electrode sheet 12 respectively. The insulating adhesive fills the space between the first electrode sheet 11, the second electrode sheet 12 and the PTC element 20 to form the insulating element 30. Since the insulating adhesive has a certain cohesive force and adhesion after curing, it is not necessary to fix the PTC element 20 to the first electrode sheet 11 and the second electrode sheet 12 with additional glue. This simplifies the production and processing steps of the PTC heating element 100, reduces the production cost of the PTC heating element 100 and improves the production efficiency of the PTC heating element 100.

[0063] Combination Figure 1 and Figure 4 In some embodiments of this utility model, each protrusion 13 is located in the middle of the electrode assembly 10 in a third direction, and the third direction is respectively perpendicular to the first direction and the second direction.

[0064] It should be noted that "third direction" can be understood as the width direction of the PTC heating element 100. A specific direction diagram can be found in [reference needed]. Figure 1 and Figure 4 As shown.

[0065] By positioning each protrusion 13 at the center of the electrode assembly 10 in the third direction, it is beneficial to improve the structural stability and strength of the electrode assembly 10. Furthermore, since a PTC element 20 is disposed within each protrusion 13, positioning each protrusion 13 at the center of the electrode assembly 10 in the third direction allows the PTC element 20 to also be positioned at the center of the electrode assembly 10 in the third direction. This improves the uniformity of heat diffusion along the third direction on the electrode assembly 10 generated by the PTC element 20, thereby enhancing the heating uniformity of the PTC heating element 100.

[0066] Combination Figures 1 to 4 In some embodiments of the present invention, a portion of each of the first electrode sheet 11 and the second electrode sheet 12 protrudes outward to define a protrusion groove 14, and a protrusion portion 13 is defined by the protrusion groove 14 disposed in a first direction.

[0067] For example, a portion of the first electrode sheet 11 protrudes in a direction away from the second electrode sheet 12 along a first direction to define a protrusion groove 14. Multiple protrusion grooves 14 are formed on the first electrode sheet 11, and the multiple protrusion grooves 14 are evenly spaced on the first electrode sheet 11 along a second direction. Correspondingly, a portion of the second electrode sheet 12 protrudes in a direction away from the first electrode sheet 11 along the first direction to define a protrusion groove 14. Multiple protrusion grooves 14 are formed on the second electrode sheet 12, and the multiple protrusion grooves 14 are evenly spaced on the second electrode sheet 12 along the second direction. The multiple protrusion grooves 14 on the first electrode sheet 11 and the multiple protrusion grooves 14 on the second electrode sheet 12 are aligned one-to-one in the first direction and define multiple protrusions 13. The PTC element 20 can be positioned and installed in the protrusions 13 and electrically connected to the first electrode sheet 11 and the second electrode sheet 12 respectively.

[0068] Therefore, by making a portion of each of the first electrode sheet 11 and the second electrode sheet 12 protrude outward to define the protrusion groove 14, and defining the protrusion portion 13 by the protrusion groove 14 that is directly opposite each other in the first direction, it is beneficial to avoid the first electrode sheet 11 and the second electrode sheet 12 becoming too thin due to the processing of grooves on the first electrode sheet 11 and the second electrode sheet 12. This helps to prevent the structural strength difference between the first electrode sheet 11 and the second electrode sheet 12, and ensures the supporting effect of the first electrode sheet 11 and the second electrode sheet 12 on the PTC element 20 and the insulating member 30.

[0069] In some other embodiments of the present invention, a portion of one of the first electrode sheet 11 and the second electrode sheet 12 protrudes outward to define a protrusion groove 14, and the first electrode sheet 11 and the second electrode sheet 12 cooperate to define a protrusion 13.

[0070] For example, a portion of the first electrode sheet 11 protrudes in a direction away from the second electrode sheet 12 along a first direction to define a protrusion groove 14, and the second electrode sheet 12 cooperates with the first electrode sheet 11 to define a protrusion 13; or a portion of the second electrode sheet 12 protrudes in a direction away from the first electrode sheet 11 along a first direction to define a protrusion groove 14, and the first electrode sheet 11 cooperates with the second electrode sheet 12 to define a protrusion 13.

[0071] By making a portion of one of the first electrode sheet 11 and the second electrode sheet 12 protrude outward to define the protrusion groove 14, it is beneficial to simplify the manufacturing process of the electrode assembly 10, reduce the manufacturing difficulty of the electrode assembly 10, and improve the manufacturing efficiency of the electrode assembly 10.

[0072] It is understood that the protrusion groove 14 can be formed on the first electrode plate 11, the second electrode plate 12, or the first electrode plate 11 and the second electrode plate 12. The specific location of the protrusion groove 14 can be determined according to the actual production requirements, and no specific limitation is made here, as long as the first electrode plate 11 and the second electrode plate 12 cooperate to define the protrusion 13.

[0073] like Figure 3 As shown, in some embodiments of this utility model, the thickness C1 of the first electrode sheet 11 ranges from 0.5mm to 1mm, and the thickness C1 of the second electrode sheet 12 ranges from 0.5mm to 1mm.

[0074] It should be noted that "thickness" can be understood as the dimension in the first direction.

[0075] Considering the supporting effect of the electrode assembly 10 on the insulating component 30 and the PTC element 20, as well as the resistance of the PTC heating element 100 to the airflow, the thickness C1 of the first electrode sheet 11 and the thickness C1 of the second electrode sheet 12 are designed to ensure the structural strength of the first electrode sheet 11 and the second electrode sheet 12. This helps to ensure the supporting effect of the electrode assembly 10 on the insulating component 30 and the PTC element 20, while also reducing the resistance of the PTC heating element 100 to the airflow, improving the smoothness of the airflow when passing through the PTC heating element 100, reducing the noise generated when the airflow passes through the PTC heating element 100, and improving the heat exchange effect between the airflow and the PTC heating element 100.

[0076] Specifically, the thickness C1 of the first electrode sheet 11 is in the range of 0.5mm to 1mm to ensure that the thickness of the first electrode sheet 11 is within a reasonable range, which helps to ensure the structural strength of the first electrode sheet 11 and prevents the PTC heating element 100 from being too thick due to the first electrode sheet 11 being too thick, thereby helping to reduce the resistance of the PTC heating element 100 to the airflow.

[0077] When the thickness C1 of the first electrode sheet 11 is less than 0.5 mm, the first electrode sheet 11 is too thin, resulting in poor structural strength. This leads to poor support for the insulation component 30 and the PTC element 20. When the thickness C1 of the first electrode sheet 11 is greater than 1 mm, the first electrode sheet 11 is too thick. Although it has high structural strength, it increases the thickness of the PTC heating element 100. This results in greater resistance to airflow from the PTC heating element 100, affecting the smoothness of airflow through the PTC heating element 100 and increasing noise. It also easily affects the heat exchange effect between the airflow and the PTC heating element 100.

[0078] The thickness C1 of the second electrode sheet 12 is in the range of 0.5mm to 1mm to ensure that the thickness of the second electrode sheet 12 is within a reasonable range. This helps to ensure the structural strength of the second electrode sheet 12 and prevents the PTC heating element 100 from becoming too thick due to the second electrode sheet 12 being too thick, thereby reducing the resistance of the PTC heating element 100 to the airflow.

[0079] When the thickness C1 of the second electrode plate 12 is less than 0.5 mm, the second electrode plate 12 is too thin, resulting in poor structural strength. This leads to poor support for the insulation component 30 and the PTC element 20. When the thickness C1 of the second electrode plate 12 is greater than 1 mm, the second electrode plate 12 is too thick. Although it has high structural strength, it increases the thickness of the PTC heating element 100. This results in greater resistance to airflow from the PTC heating element 100, affecting the smoothness of airflow through the PTC heating element 100 and increasing noise. It also easily affects the heat exchange effect between the airflow and the PTC heating element 100.

[0080] Reference Figure 3 In some embodiments of this utility model, in the first direction, the thickness B of the protrusion 13 ranges from 1.8 mm to 3.5 mm.

[0081] For example, the protrusion 13 is formed by the cooperation of the protrusion groove 14 defined by the first electrode plate 11 and the second electrode plate 12. That is, the protrusion 13 can be understood as a cavity defined by the first electrode plate 11 and the second electrode plate 12. Then the thickness of the protrusion 13 can be understood as the dimension of the cavity in the first direction. The protrusion 13 is used to install the PTC element 20. The two sides of the PTC element 20 in the first direction can fit against the inner wall of the protrusion 13. The thickness B of the protrusion 13 is the thickness of the PTC element 20.

[0082] By setting the thickness B of the protrusion 13 to a range of 1.8 mm to 3.5 mm, the thickness of the PTC element 20 can also be set to a range of 1.8 mm to 3.5 mm. This ensures that the PTC element 20 has good pressure resistance while also having suitable stable power, thereby helping to ensure the working performance of the PTC heating element 100.

[0083] Specifically, when the thickness B of the protrusion 13 is less than 1.8 mm, the thickness of the PTC element 20 needs to be less than 1.8 mm, which leads to a decrease in the withstand voltage performance of the PTC element 20. This makes the PTC element 20 more susceptible to breakdown, resulting in a short circuit or thermal runaway, affecting the service life and safety of the PTC heating element 100. When the thickness B of the protrusion 13 is greater than 3.5 mm, the thickness of the PTC element 20 needs to be greater than 3.5 mm to fit against the inner wall of the protrusion 13 and ensure the support effect of the first electrode plate 11 and the second electrode plate 12 on the PTC element 20. However, if the thickness of the PTC element 20 is too large, its stable power will be low, resulting in a slow heating speed of the PTC element 20 and affecting the working performance of the PTC heating element 100.

[0084] like Figure 3 As shown, in the first direction, the minimum distance between the first electrode plate 11 and the second electrode plate 12 is A, where B > A ≥ 1 mm.

[0085] For example, a portion of each of the first electrode sheet 11 and the second electrode sheet 12 protrudes outward to define a protrusion groove 14, and the protrusion groove 14, which is disposed opposite each other in a first direction, defines a protrusion 13. Then, the minimum distance A between the first electrode sheet 11 and the second electrode sheet 12 is the distance between the portions of the first electrode sheet 11 and the second electrode sheet 12 that are disposed opposite each other in the first direction and do not define the protrusion groove 14.

[0086] By designing the spacing between the first electrode plate 11 and the second electrode plate 12 in relation to the thickness B of the protrusion 13, the risk of short circuit in the PTC heating element 100 is reduced. At the same time, it is beneficial to reduce the thickness of the PTC heating element 100, thereby reducing the resistance of the PTC heating element 100 to airflow and improving the smoothness of airflow when passing through the PTC heating element 100.

[0087] Specifically, one of the first electrode plate 11 and the second electrode plate 12 is configured as a positive electrode plate and the other as a negative electrode plate. By ensuring that the minimum distance A between the first electrode plate 11 and the second electrode plate 12 is ≥1mm, the risk of short circuit of the PTC heating element 100 due to the minimum distance A between the first electrode plate 11 and the second electrode plate 12 being too small is reduced. At the same time, A < B, that is, the thickness A of the PTC heating element 100 at the point where the protrusion 13 is not formed is less than the thickness B of the protrusion 13, which helps to reduce the thickness of the PTC heating element 100, thereby helping to reduce the resistance of the PTC heating element 100 to airflow.

[0088] Combination Figure 1 and Figure 4In some embodiments of this utility model, a first terminal 111 is provided on the first electrode plate 11, and a second terminal 121 is provided on the second electrode plate 12. The first terminal 111 and the second terminal 121 can be connected to the positive and negative terminals of the power supply to form a current path, so that the PTC element 20 can be powered on and heated.

[0089] It is understandable that when the first electrode plate 11 is configured as a positive electrode plate, the first terminal 111 is configured as a positive terminal and connected to the positive terminal of the power supply. Correspondingly, the second electrode plate 12 is configured as a negative electrode plate, and the second terminal 121 is configured as a negative terminal and connected to the negative terminal of the power supply. When the second electrode plate 12 is configured as a positive electrode plate, the second terminal 121 is configured as a positive terminal and connected to the positive terminal of the power supply. Correspondingly, the first electrode plate 11 is configured as a negative electrode plate, and the first terminal 111 is configured as a positive terminal and connected to the negative terminal of the power supply.

[0090] like Figure 5 As shown, the heater 200 according to an embodiment of the present invention includes a PTC heating element 100, which is the heating element described above.

[0091] Because the heater 200 is equipped with the aforementioned heating element, by having the first electrode plate 11 and the second electrode plate 12 cooperate to define the protrusion 13 for mounting the PTC element 20, it is beneficial to reduce the thickness of the portion of the PTC heating element 100 other than the protrusion 13. This helps to reduce the thickness of the PTC heating element 100, reduce the space required to arrange the PTC heating element 100, and also helps to reduce the wind resistance generated by the PTC heating element 100, improve the heat exchange efficiency between the airflow and the PTC heating element 100, and reduce the airflow resistance through the PTC heating element 20. The noise generated by the heating element 100 is reduced, which helps to improve the working performance of the heater 200. In addition, by setting an insulating part 30 on the outer periphery of the PTC element 20 between the first electrode 11 and the second electrode 12, the risk of short circuit in the electrode assembly 10 is reduced. At the same time, it helps to improve the sealing of the protrusion 13, preventing the PTC heating element 100 from short-circuiting or affecting the heat dissipation of the PTC heating element 100 due to the entry of dust or water and other debris into the PTC heating element 100. This helps to improve the service life and safety of the heater 200.

[0092] like Figure 5 As shown, the heater 200 includes: a housing 210, a fan assembly 220, and a plurality of PTC heating elements 100. The housing 210 is provided with an air inlet 211 and an air outlet 213. The fan assembly 220 is disposed inside the housing 210 and located between the air inlet 211 and the air outlet 213. The plurality of PTC heating elements 100 are spaced apart in a first direction to define a heating component. The heating component is disposed inside the housing 210 and adjacent to the air outlet 213.

[0093] For example, when the heater 200 is working, the operation of the impeller assembly 220 creates a negative pressure inside the housing 210. Air is drawn into the housing 210 through the air inlet 211 and flows towards the air outlet 213 under the drive of the impeller assembly 220. Multiple PTC heating elements 100 are spaced apart in the first direction. As the airflow flows towards the air outlet 213, it can pass through multiple PTC heating elements 100 and exchange heat with them. The multiple PTC heating elements 100 can effectively improve the heat exchange efficiency of the airflow. The temperature of the airflow increases after heat exchange and is discharged to the outside environment through the air outlet 213, thereby raising the temperature of the outside environment and realizing the function of the heater 200 in heating the outside environment.

[0094] It should be noted that "external environment" refers to the environment outside the casing 210 of the heater 200, which can be the indoor environment.

[0095] Reference Figure 5 In some embodiments of this utility model, an air outlet grille 214 is provided at the air outlet 213 and an air inlet grille is provided at the air inlet 211. The air inlet grille and the air outlet grille 214 help reduce the risk of dust or water and other debris entering the housing 210, thereby improving the cleanliness of the housing 210 and reducing the risk of components installed in the housing 210 (such as the impeller assembly 220 and the PTC heating element 100) malfunctioning due to water or dust ingress, thus ensuring the service life and safety of the heater 200.

[0096] like Figure 5 As shown, in some embodiments of this utility model, a duct assembly 230 is provided inside the housing 210. A duct 231 is formed inside the duct assembly 230, connecting the air inlet 211 and the air outlet 213. A fan assembly 220 is disposed inside the duct 231. Multiple PTC heating elements 100 are disposed in the duct 231 near the air outlet 213. When the fan assembly 220 is running, airflow flows into the duct 231 through the air inlet 211. The duct 231 can guide the airflow, which helps to improve the efficiency of the airflow to the air outlet 213, thereby improving the efficiency of the heater 200 in heating the external environment.

[0097] Reference Figure 5 In some embodiments of the present invention, in a first direction, an airflow channel is defined between adjacent PTC heating elements 100, and the airflow channel extends in the direction from the impeller assembly 230 to the air outlet 213.

[0098] For example, multiple PTC heating elements 100 are spaced apart in a first direction so that an airflow channel for airflow can be defined between adjacent PTC heating elements 100, and the airflow channel extends from the impeller assembly 230 toward the air outlet 213 so that when the impeller assembly 230 drives the airflow, the airflow can flow through the airflow channel. After the airflow enters the airflow channel, the airflow can exchange heat with the adjacent PTC heating elements 100 respectively, thereby increasing the contact area between the heating element and the airflow, which is beneficial to improving the heating effect of the heating element on the airflow, and thus beneficial to improving the heating effect of the heater 200 on the external environment.

[0099] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0100] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A PTC heating element, characterized in that, include: An electrode assembly includes a first electrode sheet and a second electrode sheet, the first electrode sheet and the second electrode sheet being insulated from each other and spaced apart in a first direction, the first electrode sheet and the second electrode sheet cooperating to define at least one protrusion, and in the first direction, at least a portion of the thickness of the protrusion is greater than the thickness of the electrode assembly at a position adjacent to the protrusion. At least one PTC element, each PTC element is disposed between the first electrode plate and the second electrode plate, each PTC element is electrically connected to the first electrode plate and the second electrode plate respectively, and at least one PTC element is disposed within the protrusion.

2. The PTC heating element according to claim 1, characterized in that, The electrode assembly has a plurality of protrusions, which are spaced apart in a second direction. Each protrusion is provided with at least one PTC element, and the first direction and the second direction intersect.

3. The PTC heating element according to claim 2, characterized in that, The plurality of protrusions are evenly spaced in the second direction.

4. The PTC heating element according to claim 2, characterized in that, It also includes an insulating member extending along the second direction, the insulating member being disposed between the first electrode sheet and the second electrode sheet, and the insulating member having a plurality of clearance through holes, the plurality of clearance through holes being disposed in a one-to-one correspondence with the plurality of protrusions, and the PTC element being disposed in each of the clearance through holes.

5. The PTC heating element according to claim 2, characterized in that, Each of the protrusions is located in the middle of the electrode assembly in a third direction, which is perpendicular to the first direction and the second direction, respectively.

6. The PTC heating element according to claim 1, characterized in that, A portion of each of the first electrode sheet and the second electrode sheet protrudes outward to define a protrusion groove, and the protrusion portion is defined by the protrusion groove which is disposed opposite to the first direction.

7. The PTC heating element according to claim 1, characterized in that, The thickness C1 of the first electrode sheet ranges from 0.5 mm to 1 mm, and the thickness C1 of the second electrode sheet ranges from 0.5 mm to 1 mm.

8. The PTC heating element according to any one of claims 1-7, characterized in that, In the first direction, the thickness B of the protrusion ranges from 1.8 mm to 3.5 mm.

9. The PTC heating element according to claim 8, characterized in that, In the first direction, the minimum distance between the first electrode sheet and the second electrode sheet is A, where B > A ≥ 1 mm.

10. A heater, characterized in that, Includes a PTC heating element, wherein the PTC heating element is the PTC heating element according to any one of claims 1-9.

11. The heater according to claim 10, characterized in that, include: The housing is provided with an air inlet and an air outlet; A wind turbine assembly, wherein the wind turbine assembly is disposed within the housing and located between the air inlet and the air outlet; There are multiple PTC heating elements, which are spaced apart in the first direction to define a heating assembly. The heating assembly is located inside the housing and adjacent to the air outlet.

12. The heater according to claim 11, characterized in that, In the first direction, an airflow channel is defined between adjacent PTC heating elements, the airflow channel extending in the direction from the impeller assembly to the air outlet.

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