Heating unit, heating assembly and cross-flow heater

Abstract

The utility model discloses a kind of heating unit, heating assembly and through-flow fan heater, heating unit includes the heating plate of plane extension arrangement, radiator is set on the heating plate, heat conduction sheet is set between radiator and heating plate, the side of heating plate away from radiator is covered with heat insulation sheet, heating assembly includes two above-mentioned heating unit, and two heating units are mutually connected and set at included angle α, through-flow fan heater includes above-mentioned heating assembly, and heating assembly is located in the through-flow air duct of through-flow fan heater.

Description

Technical Field

[0001] This utility model relates to the field of electrical manufacturing technology, and in particular to a heating unit, heating component and cross-flow warm air blower. Background Technology

[0002] The heating unit of a cross-flow heater is its core component and plays a crucial role in enabling the heater to dissipate heat. Existing cross-flow heaters have a cross-flow duct, and the heating unit is located inside the cross-flow duct. The heat generated by the heating unit is transported to the air outlet by a fan wheel set on the path inside the cross-flow duct.

[0003] Existing heating units typically use a heating plate with a radiator mounted on one side. The heat emitted by the heating plate is quickly diffused into the cross-flow duct through the radiator, and then transported to the air outlet by the fan. However, the side of the existing heating unit away from the radiator is prone to dust and impurities, resulting in poor heat dissipation. Furthermore, since the radiator is directly mounted on the heating plate, it generates noise when working, which greatly affects the consumer experience. Utility Model Content

[0004] The purpose of this invention is to provide a heating unit, heating component, and cross-flow heater that can not only prevent dust from adhering to the surface of the heating plate and affecting the heating effect, but also prevent noise generated when the heating plate and radiator are working.

[0005] This utility model provides a heating unit, including a heating plate extending from a plane and a heat sink disposed on the heating plate. A heat-conducting sheet is disposed between the heat sink and the heating plate. A heat-insulating sheet is covered on the side of the heating plate away from the heat sink. The heating plate is a thick-film heating plate. The heat-insulating sheet is located on the side of the thick-film heating plate with printed resistive circuits. The heat sink is located on the side of the thick-film heating plate away from the resistive circuits.

[0006] Furthermore, the heat-conducting sheet is a graphite sheet.

[0007] Furthermore, the heat insulation sheet is a mica sheet.

[0008] This utility model provides a heating component, including two heating units as described above, and the two heating units are connected to each other at an included angle α.

[0009] Furthermore, 100°≤α≤180°.

[0010] Furthermore, the heating component includes a first heating plate and a second heating plate connected to each other and arranged at an angle α. A first radiator is installed on the first heating plate, and a second radiator is installed on the second heating plate. The first radiator installed on the first heating plate has a first inclined surface on the side near the second heating plate, and the first inclined surface is arranged at an angle β with the first heating plate. The second radiator installed on the second heating plate has a second inclined surface on the side near the first heating plate, and the second inclined surface is arranged at an angle γ with the second heating plate. The included angle α is equal to the sum of included angle β and included angle γ.

[0011] Furthermore, the included angle β is equal to the included angle γ.

[0012] This utility model provides a cross-flow heater, including the above-mentioned heating component, wherein the heating component is located in the cross-flow duct of the cross-flow heater.

[0013] Furthermore, the heating element divides the cross-flow duct into a main duct and a secondary duct.

[0014] Furthermore, the cross-flow warm air blower includes two side plates arranged in parallel, a back plate and a tongue plate installed at opposite ends of the two side plates, the back plate and the tongue plate being spaced apart, and the two side plates, the back plate and the tongue plate together forming the cross-flow air duct, the two ends of the heating element located in the cross-flow air duct being installed on the side plates, and the heating element being spaced apart from the back plate and the tongue plate, and the main air duct being located between the heating element and the tongue plate, and the secondary air duct being located between the heating element and the back plate.

[0015] The heating unit, heating component, and cross-flow fan heater provided by this utility model, by setting a radiator on the heating plate, with a heat-conducting fin between the radiator and the heating plate, and covering the side of the heating plate away from the radiator with a heat-insulating sheet, not only prevents dust from adhering to the surface of the heating plate and affecting the heating effect, but also prevents noise generated by the heating plate and the radiator during operation. Furthermore, the heat-insulating sheet covering the side of the heating plate away from the radiator ensures that the heat generated by the heating plate is concentrated and transferred towards the radiator, and then diffused by the radiator into the cross-flow air duct of the cross-flow fan heater, and discharged from the air outlet of the cross-flow air duct for effective use by the consumer. Attached Figure Description

[0016] Figure 1 This is a perspective view of a cross-flow warm air heater according to the present invention.

[0017] Figure 2 for Figure 1 The image shows a front view of a cross-flow warm air heater.

[0018] Figure 3 for Figure 2 The cross-flow warm air blower shown is a cross-sectional view along plane AA.

[0019] Figure 4 for Figure 3 The enlarged view of part B of the cross-flow warm air heater shown.

[0020] Figure 5 for Figure 1 The image shows a three-dimensional view of the cross-flow heater from another angle.

[0021] Figure 6 This is a perspective view of part of the structure of the cross-flow warm air blower of this utility model.

[0022] Figure 7 for Figure 6 The diagram shown is an exploded 3D view of a cross-flow warm air heater.

[0023] Figure 8 This is a perspective view of the back panel of the cross-flow warm air blower of this utility model.

[0024] Figure 9 This is a perspective view of the tongue plate of the cross-flow warm air blower of this utility model.

[0025] Figure 10 This is a perspective view of the guide plate of the cross-flow warm air blower of this utility model.

[0026] Figure 11 This is a perspective view of the heating component of this utility model.

[0027] Figure 12 for Figure 11 A magnified view of part C of the heating element shown.

[0028] Figure 13 for Figure 11 An exploded three-dimensional view of a portion of the structure of the heating element shown.

[0029] Figure 14 This is a perspective view of the heating component of this utility model from another angle.

[0030] Figure 15 for Figure 14 The diagram shown is a 3D view of the heating component without the power supply crimping module.

[0031] Figure 16 This is a perspective view of the heating unit of this utility model.

[0032] Figure 17 for Figure 16 A three-dimensional view of the heating unit from another angle.

[0033] Figure 18 for Figure 16 The diagram shown is an exploded view of the heating unit and the power supply crimping module.

[0034] Figure 19 This is a perspective view of the power supply crimping module of this utility model.

[0035] Figure 20 for Figure 19 An exploded perspective view of the power crimping module shown.

[0036] Figure 21 for Figure 19 A three-dimensional view of the power crimping module from another angle.

[0037] Figure 22 for Figure 21 An exploded perspective view of the power crimping module shown.

[0038] Figure 23 This is a schematic diagram of the crimping of the power supply crimping module and the heating unit of this utility model. Detailed Implementation

[0039] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0040] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0041] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.

[0042] Please see Figures 1-23This utility model discloses a cross-flow warm air heater, including a cross-flow duct 50 having an air inlet end 53 and an air outlet end 54, and an airflow conveying device 80 disposed on the path of the cross-flow duct 50. The airflow conveying device 80 is used to generate airflow within the cross-flow duct 50 that enters from the air inlet end 53 and exits from the air outlet end 54. A heating element 60 is disposed within the cross-flow duct 50 and extends along its path direction. The heating element 60 divides the cross-flow duct 50 into a main air duct 51 and a secondary air duct 52. Heat is generated on both sides of the heating element 60, and the heat generated on both sides of the heating element 60 is respectively conveyed through the main air duct 51 and the secondary air duct 52 by the airflow conveying device 80 towards the air outlet end 54 of the cross-flow duct 50.

[0043] In this embodiment, the airflow conveying device 80 is located at the air inlet 53 of the cross-flow duct 50 and blows air into the cross-flow duct 50 to transport the heat generated by the heating element 60 to the air outlet 54. In another embodiment, the airflow conveying device 80 may also be located at the air outlet 54 of the cross-flow duct 50 and draws air out of the air outlet 54 to deliver the heat generated by the heating element 60. Alternatively, in other embodiments, the airflow conveying device 80 may be located within the cross-flow duct 50, and may also be provided in both the main air duct 51 and the secondary air duct 52, to achieve the purpose of conveying the heat generated by the heating element 60 to the air outlet 54. No particular limitation is made here.

[0044] Please see Figure 1 , Figure 2 , Figures 5-7Specifically, the cross-flow warm air heater includes two relatively parallel side plates 10, a back plate 20 and a tongue plate 30 installed at opposite ends of the two side plates 10. The back plate 20 and the tongue plate 30 are spaced apart and located at the front and rear ends of the two side plates 10, and the two side plates 10, the back plate 20 and the tongue plate 30 together form the cross-flow air duct 50. The two ends of the heating element 60 located in the cross-flow air duct 50 are installed on the side plates 10, and the heating element 60 is spaced apart from the back plate 20 and the tongue plate 30. The main air duct 51 is located between the heating element 60 and the tongue plate 30, and the secondary air duct 52 is located between the heating element 60 and the back plate 20. In this embodiment, the distance between the heating element 60 and the tongue plate 30 is greater than the distance between the heating element 60 and the back plate 20, so that the heat generated by the heating element 60 mainly flows to the main air duct 51 and is transported from the main air duct 51 to the air outlet 54. More specifically, in this embodiment, the two side plates 10, the heating element 60, and the tongue plate 30 together form the main air duct 51; the two side plates 10, the heating element 60, and the back plate 20 together form the secondary air duct 52.

[0045] In this embodiment, the back plate 20 is provided with a protrusion. The protrusion mainly serves to strengthen the overall strength of the back plate 20 to prevent the back plate 20 from deforming during use, thereby reducing the thickness of the back plate 20. It also ensures that the back plate 20 is lightweight while reducing material usage costs.

[0046] Please see Figures 1-3 , Figure 6 and Figure 7 In this embodiment, the airflow conveying device 80 is a cross-flow fan, which is rotatably mounted between the two side plates 10. Furthermore, the cross-flow heater also includes a drive motor 90 for driving the cross-flow fan to rotate. The drive motor 90 is mounted on one side plate 10, and its drive shaft is fixedly connected to the cross-flow fan, enabling it to drive the fan to rotate around the axis of the drive shaft to generate driving force to transport the airflow within the cross-flow duct 50 to the outlet 54. Simultaneously, it can also transport the airflow from the inlet 53 into the cross-flow duct 50, thus forming a cross-flow airflow transport operation.

[0047] Please see Figure 3 and Figure 10The cross-flow heater also includes a guide plate 40 installed at one end of the back plate 20. The guide plate 40 is installed on the edge of the back plate 20 near the air inlet 53, and extends in an arc shape around the cross-flow fan. More specifically, the guide plate 40 includes a connecting end 41 connected to the back plate 20, and a guide end 42 extending in an arc shape away from the connecting end 41 towards the air inlet 53. The guide plate 40 is used to guide airflow into the air inlet 53. In this embodiment, the connecting end 41 of the guide plate 40 is fixedly connected to the back plate 20 by welding. In other embodiments, the guide plate 40 can also be formed by bending the end of the back plate 20 to guide air into the cross-flow duct 50, which is not particularly limited here.

[0048] Furthermore, in this embodiment, the cross-flow impeller can be located between the guide plate 40 and the tongue plate 30, and at the air inlet end 53 of the cross-flow duct 50; the cross-flow impeller can also be located between the back plate 20 and the tongue plate 30, and at the air outlet end 54 of the cross-flow duct 50.

[0049] Please see Figures 11-16 In this embodiment, the heating component 60 includes two heating units. Each heating unit includes a heating plate 61 extending in a plane and at least one heat sink 62 disposed on each heating plate 61. A heat-conducting unit 63 is disposed between the heat sink 62 and the heating plate 61. In this embodiment, the heat-conducting unit 63 is a heat-conducting sheet. A heat-insulating unit 64 is covered on the side of the heating plate 61 facing away from the heat sink 62. In this embodiment, the heat-insulating unit 64 is a heat-insulating sheet. In this embodiment, the heating plate 61 is a thick-film heating plate. The thick-film heating plate includes a substrate 616, an insulating layer 615 covering one side of the substrate 616, and a resistor circuit 613 printed on the insulating layer 615. Fasteners 614 are welded to the other side of the substrate 616. The thick-film heating plate is connected to the heat sink 62 through the fasteners 614. In this embodiment, the fastener 614 can be a screw with external threads or a nut with internal threads, depending on whether it is threadedly engaged with a locking component to achieve connection. No particular limitation is made here.

[0050] Please see Figures 15-17The substrate 616 has a pad 6131 on one side of the resistor circuit 613. The pad 6131 is located at the end of the resistor circuit 613 and is used for electrical connection with the power supply crimping module 70. The fastener 614 is also soldered to the side of the substrate 616 adjacent to the pad 6131. ​​The fastener 614 is soldered to the surface of the substrate 616. In this embodiment, the fastener 614 is soldered to the surface of the substrate 616, which differs from the prior art method of fixing the fastener 614 by through-hole. The advantages are: first, it does not affect the reduction of the heating area of ​​the resistor circuit 613 of the heating plate 61; second, it does not affect the layout design of the resistor circuit 613 of the heating plate 61. Furthermore, the insulating layer 615 is recessed with a relief groove 6151 corresponding to the fastener 614 on the side of the substrate 616 located on the resistor circuit 613. The fastener 614 on the side of the substrate 616 located on the resistor circuit 613 is accommodated in the relief groove 6151 and is spaced apart from the edge of the insulating layer 615.

[0051] The fastener 614 includes a welding portion 6141 and a threaded portion 6142. The top surface of the welding portion 6141 is welded to the surface of the substrate 616. The threaded portion 6142 extends from the welding portion 6141 in a direction away from the substrate 616. In this embodiment, the threaded portion 6142 has an internal thread and engages with the external thread of the locking member through the internal thread. In another embodiment, the threaded portion 6142 has an external thread and engages with the internal thread of the locking member through the external thread. More specifically, the heat sink 62 is mounted on the side of the substrate 616 opposite to the resistor circuit 613. The heat sink 62 has a mounting hole corresponding to the fastener 614. When the heat sink 62 is mounted on the other side of the substrate 616, the fastener 614 passes through the mounting hole and is fixed to the other side of the substrate 616 by the locking member that engages with the fastener 614.

[0052] In some embodiments, a cover layer is provided on one side of the substrate 616 located on the resistor circuit 613, and the cover layer covers at least the resistor circuit 613. Typically, the cover layer covers the entire surface of the substrate 616 located on the resistor circuit 613 to prevent impurities, dust, etc. from adhering to the resistor circuit 613. In particular, large particles of impurities may cause the resistor circuit 613 to short-circuit. Furthermore, dust, impurities, etc. may be conductive, which may reduce the insulation performance of the substrate 616.

[0053] Please see Figures 11-13A heat-conducting sheet is installed between the radiator 62 and the other side of the substrate 616. In this embodiment, the heat-conducting sheet is a graphite sheet. The graphite sheet is placed between the substrate 616 and the radiator 62. Based on the good thermal conductivity and soft texture of the graphite sheet, the advantages are: first, it can ensure that the radiator 62 and the other side of the substrate 616 are in close contact; second, it prevents the vibration generated by the radiator 62 during the operation of the cross-flow heater from colliding and rubbing against the substrate 616, which would produce a harsh sound and affect the service life of the cross-flow heater. Furthermore, the heat insulation sheet is mounted on one side of the substrate 616, and the heat insulation sheet is located on the side of the substrate 616 on which the resistor circuit 613 is printed. The heat sink 62 is located on the side of the thick film heating plate opposite to the resistor circuit 613. The heat insulation sheet is a mica sheet, wherein the mica sheet covers at least the resistor circuit 613. In this embodiment, the advantages of using the mica sheet are: first, it can effectively prevent impurities, dust, etc. from adhering to the resistor circuit 613, and even large particles of impurities can cause the resistor circuit 613 to short-circuit; second, the mica sheet can be used to transfer the heat generated by the resistor circuit 613 to the side of the substrate 616 on which the heat sink 62 is mounted, so that the heat generated by the heating component 60 is mainly supplied to the main air duct 51.

[0054] Please see Figures 13-14 The heating component 60 also includes a retaining spring 65, which is used to fix the heat insulation sheet on the substrate 616. The retaining spring 65 has a U-shaped structure with two clamping arms. When the retaining spring 65 is engaged on the substrate 616, the two clamping arms clamp the heat sink 62 and the heat insulation sheet respectively to fix the heat insulation sheet.

[0055] Please see Figure 8 The backplate 20 further includes a first extension 21 and a second extension 22 connected to each other, the first extension 21 and the second extension 22 being arranged at an included angle α, and 100°≤α≤180°. The connecting end 41 of the guide plate 40 is fixed to the end of the first extension 21.

[0056] In a preferred embodiment, the included angle α can be set to 100°, 120°, 135°, 150°, 160°, or 180°. The closer the included angle α is to 135°, the lower the heat loss rate. Therefore, in this embodiment, an included angle of 135° is preferred. This allows the heat generated by the heating element 60 to generate a certain air pressure in the direction from the first extension section 21 to the second extension section 22. This ensures a more rapid airflow from the second extension section 22 to the air outlet 54, guaranteeing that the heat generated by the heating element 60 can be quickly transferred to the air outlet 54 for consumer use. In other words, the heat loss rate of the heat generated by the heating element 60 within the cross-flow duct 50 is low, thus achieving optimal heat transfer efficiency. In another embodiment, the included angle α can also be 100°, which also ensures a low heat loss rate within the cross-flow duct 50, but its heat transfer efficiency is not as good as the optimal effect achieved with an included angle of 135°. In another embodiment, the included angle α is also 180°. In this case, the first extension segment 21 and the second extension segment 22 are arranged to extend in the same plane. The heat loss rate of the heat generated by the heating component 60 in the cross-flow duct 50 is also low, which can also improve the heat transfer efficiency.

[0057] However, when the included angle α < 100°, a heat vortex will exist at the connection between the first extension segment 21 and the second extension segment 22, resulting in heat accumulation. As a result, the heat generated by the heating component 60 cannot be well delivered to the air outlet 54, and the heat delivered by the air outlet 54 is far from ideal, greatly reducing the heat transfer efficiency.

[0058] Please see Figures 3-4In this embodiment, the two heating units are interconnected to cooperate with the first extension 21 and the second extension 22 of the back plate 20, which are also arranged at an angle α, and 100°≤α≤180°. More specifically, the heating assembly 60 includes a first heating plate 611 and a second heating plate 612 that are interconnected and arranged at an angle α. The first heating plate 611 is arranged parallel to the first extension 21, and the second heating plate 612 is arranged parallel to the second extension 22. A first radiator 621 is mounted on the first heating plate 611, and a second radiator 622 is mounted on the second heating plate 612. The first radiator 621 mounted on the first heating plate 611 has a first inclined surface 6211 on the side near the second heating plate 612, and the first inclined surface 6211 is set at an angle β with the first heating plate 611. The second radiator 622 mounted on the second heating plate 612 has a second inclined surface 6221 on the side near the first heating plate 611, and the second inclined surface 6221 is set at an angle γ with the second heating plate 612, and the included angle α is equal to the sum of included angle β and included angle γ. Furthermore, in this embodiment, the included angles β and γ are equal. The purpose of this is that the first radiator 621 and the second radiator 622 can be manufactured with uniform dimensions, reducing the design and production costs of different molds required for different models of radiators. Moreover, it is beneficial to prepare only one type of material during production preparation, which can effectively prevent the use of the wrong material during production assembly.

[0059] Please see Figure 3 , Figure 4 and Figure 9 The tongue plate 30 further includes a first extension section 31 and a second extension section 32 connected to each other. The first extension section 31 is arranged parallel to the first extension section 21, and the second extension section 32 is arranged parallel to the second extension section 22. Furthermore, the tongue plate 30 also includes a guide extension section 33 connected to the first extension section 31. The tail end of the guide extension section 33 expands outward at the air inlet end 53 to facilitate airflow into the cross-flow duct 50 from the air inlet end 53.

[0060] Please see Figure 1 , Figure 5 , Figures 18-23 The cross-flow heater also includes a power crimping module 70 electrically connected to the heating element 60. An external power source supplies power to the thick film heating plate through the power crimping module 70. The power crimping module 70 also has the function of detecting the temperature of the thick film heating plate and protecting it when the temperature of the thick film heating plate is too high.

[0061] The power crimping module 70 includes a high-temperature resistant mounting bracket 71 made of insulating material mounted on the thick-film heating plate, and a first electronic device 73 elastically mounted between the heating plate 61 and the mounting bracket 71 and electrically connected to the pad 6131 of the thick-film heating plate / the resistor circuit 613. The mounting bracket 71 has a first through hole 712 corresponding to the first electronic device 73. The first electronic device 73 is installed in the first through hole 712. At least one pair of extension arms 713 extend from the hole wall of the first through hole 712. The at least one pair of extension arms 713 are crimped onto the upper surface of the first electronic device 73 to maintain the electrical connection between the first electronic device 73 and the pad 6131 / the resistor circuit 613. In this embodiment, the first electronic device 73 is a temperature controller used to protect the thick-film heating plate when it exceeds the set maximum temperature. The first electronic device 73 may also have a manual reset function. More specifically, in this embodiment, the lower surface of the extension arm 713 is provided with a protrusion 714, which abuts against the first electronic device 73 to maintain the electrical connection between the first electronic device 73 and the pad 6131 / resistor circuit 613. In another embodiment, the extension arm 713 is inclined downward from the connection end to the free end, and the end of the extension arm 713 abuts against the first electronic device 73 to maintain the electrical connection between the first electronic device 73 and the pad 6131 / resistor circuit 613. In other embodiments, the purpose of providing the extension arm 713 is to achieve the function of maintaining the electrical connection between the first electronic device 73 and the pad 6131 / resistor circuit 613, and no particular limitation is made here.

[0062] The power crimping module 70 includes at least one of the first electronic devices 73. Specifically, in one embodiment, the power crimping module 70 includes one first electronic device 73, which is an automatic temperature controller. When the heating temperature of the resistor circuit 613 of the thick film heating plate exceeds a preset temperature, the automatic temperature controller automatically disconnects to provide protection. In another embodiment, the power crimping module 70 also includes two first electronic devices 73, one of which is an automatic temperature controller and the other is a manual temperature controller. When the heating temperature of the resistor circuit 613 of the thick film heating plate exceeds a preset temperature, the automatic temperature controller automatically disconnects to provide protection. The user can also manually operate the manual temperature controller to disconnect for protection based on the real-time temperature. Furthermore, the manual temperature controller can be manually operated when the automatic temperature controller fails to further enhance the protection.

[0063] The power crimping module 70 further includes a second electronic device 72. The mounting bracket 71 has a second through hole 711 corresponding to the second electronic device 72. The second electronic device 72 is installed within the second through hole 711 and is elastically mounted between the mounting bracket 71 and the thick-film heating plate. The second electronic device 72 is electrically connected to the pad 6131 / resistive circuit 613 of the thick-film heating plate. More specifically, an elastic element 721 is provided between the second electronic device 72 and the mounting bracket 71. The two ends of the elastic element 721 abut against the upper surface of the second electronic device 72 and the lower surface of the mounting bracket 71, respectively, to maintain the electrical connection between the second electronic device 72 and the pad 6131 / resistive circuit 613. More specifically, the elastic element 721 is a spring, which is sleeved around the second electronic device 72 and has its two ends abut against the upper surface of the second electronic device 72 and the lower surface of the mounting bracket 71, respectively. In this embodiment, the second electronic device 72 is a temperature sensor, used to detect the temperature of the resistive circuit 613 of the thick film heating plate in real time, and transmit the detected real-time temperature data to the temperature controller.

[0064] The power crimping module 70 further includes a power terminal 74, which is fixed to the mounting bracket 71. One end of the power terminal 74 extends upward from the mounting bracket 71 and is electrically connected to an external power source. The other end is located between the mounting bracket 71 and the pad 6131 of the thick-film heating plate, and its tail end is arc-shaped and elastically abuts against the pad 6131 to maintain the electrical connection between the power terminal 74 and the pad 6131. ​​More specifically, in this embodiment, the power crimping module 70 includes at least two power terminals 74, and the two power terminals 74 are spaced apart to connect to the positive and negative terminals of the external power source.

[0065] In this embodiment, the mounting bracket 71 has a third through hole 715 corresponding to the power terminal 74, and the power terminal 74 is fixedly installed in the third through hole 715. In other embodiments, the power terminal 74 can also be injection molded onto the mounting bracket 71 by in-mold injection molding, so that the power terminal 74 is fixed onto the mounting bracket 71, and the power terminal 74 can maintain electrical connection to the solder pad 6131 when the mounting bracket 71 is installed on the thick film heating plate. No particular limitation is made here.

[0066] In this embodiment, the first electronic device 73, the second electronic device 72, and the power terminal 74 are covered on the thick film heating plate using the mounting bracket 71. This not only facilitates assembly but also saves a lot of space. Furthermore, the mounting bracket 71 is made of high-temperature resistant insulating material and can withstand the high temperature of 400~500℃ of the thick film heating plate without melting due to excessive temperature, which greatly improves the safety and stability of the crimping.

[0067] The heating unit, heating component 60, and cross-flow heater provided by this utility model, by setting a radiator 62 on the heating plate 61, and providing a heat-conducting fin between the radiator 62 and the heating plate 61, and covering the side of the heating plate 61 away from the radiator 62 with a heat-insulating sheet, not only can dust be prevented from adhering to the surface of the heating plate 61 and affecting the heating effect, but also noise generated by the heating plate 61 and the radiator 62 during operation can be prevented. Furthermore, the heat-insulating sheet covering the side of the heating plate 61 away from the radiator 62 ensures that the heat generated by the heating plate 61 is concentrated and transferred towards the radiator 62, and then diffused by the radiator 62 into the cross-flow air duct 50 of the cross-flow heater, and discharged from the air outlet 54 of the cross-flow air duct 50 for effective use by the consumer.

[0068] The cross-flow heater provided by the present invention divides the cross-flow duct 50 into the main duct 51 and the secondary duct 52 through the heating element 60, so that the heat generated by the heating element 60 flows to the air outlet 54 through the main duct 51 and the secondary duct 52, thereby reducing heat loss. Furthermore, the first extension 21 and the second extension 22 of the back plate 20 are set at an angle, which reduces the heat loss rate of the heat generated by the heating element 60 in the cross-flow duct 50. With the help of the airflow conveying device 80 set on the path of the cross-flow duct 50, the heat generated on both sides of the heating element 60 can be quickly conveyed to the air outlet 54, which greatly improves the heat delivery efficiency of the cross-flow heater.

[0069] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A heating unit, characterized in that: The device includes a heating plate extending from a plane, a heat sink disposed on the heating plate, a heat-conducting sheet disposed between the heat sink and the heating plate, a heat insulation sheet covering the side of the heating plate facing away from the heat sink, the heating plate being a thick-film heating plate, the heat insulation sheet being located on the side of the thick-film heating plate printed with a resistive circuit, and the heat sink being located on the side of the thick-film heating plate facing away from the resistive circuit.

2. The heating unit as described in claim 1, characterized in that: The heat-conducting sheet is a graphite sheet.

3. The heating unit as described in claim 1, characterized in that: The heat insulation sheet is a mica sheet.

4. A heating element, characterized in that: It includes two heating units as described in any one of claims 1-3, and the two heating units are connected to each other at an included angle α.

5. The heating component as described in claim 4, characterized in that: 100°≤α≤180°。 6. The heating component as described in claim 4, characterized in that: The heating assembly includes a first heating plate and a second heating plate connected to each other and arranged at an angle α. A first radiator is installed on the first heating plate, and a second radiator is installed on the second heating plate. The first radiator installed on the first heating plate has a first inclined surface on the side near the second heating plate, and the first inclined surface is arranged at an angle β with the first heating plate. The second radiator installed on the second heating plate has a second inclined surface on the side near the first heating plate, and the second inclined surface is arranged at an angle γ with the second heating plate. The included angle α is equal to the sum of included angle β and included angle γ.

7. The heating component as described in claim 6, characterized in that: The included angle β is equal to the included angle γ.

8. A cross-flow heater, comprising the heating element as described in any one of claims 4-7, characterized in that: The heating element is located inside the cross-flow duct of the cross-flow heater.

9. The warm air blower as described in claim 8, characterized in that: The heating element divides the cross-flow duct into a main duct and a secondary duct.

10. The warm air blower as described in claim 9, characterized in that: The cross-flow heater includes two side plates arranged in parallel, a back plate and a tongue plate installed at opposite ends of the two side plates, the back plate and the tongue plate being spaced apart, and the two side plates, the back plate and the tongue plate together forming the cross-flow air duct. The two ends of the heating element located in the cross-flow air duct are installed on the side plates, and the heating element is spaced apart from the back plate and the tongue plate. The main air duct is located between the heating element and the tongue plate, and the secondary air duct is located between the heating element and the back plate.

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