Heating device and hand dryer including the thereof

Abstract

This invention discloses a heating device and a hand dryer including the same. The heating device includes at least two heating elements spaced apart, each heating element including a support plate and a heating assembly connected to the support plate. An airflow passage is formed at the location of the heating elements, communicating with the spaced area between the at least two heating elements. The hand dryer includes: a housing; at least two air outlet duct assemblies communicating with the housing, each air outlet assembly having an air outlet, the at least two air outlet duct assemblies being spaced apart; and a heating device, the heating elements being positioned adjacent to corresponding air outlet duct assemblies, the heating elements and air outlets being at least partially offset, the spaced area between the at least two heating elements at least partially overlapping the spaced area between the at least two air outlet duct assemblies. The airflow passage connects the housing and the air outlets. The airflow reaches the air outlets through the overlapping or partially overlapping spaced areas, and the arrangement of the heating assemblies does not substantially obstruct the airflow, thus not affecting the airflow effect of the hand dryer.

Description

[Technical Field]

[0001] This invention relates to the field of hand dryers, and more particularly to a heating device and a hand dryer including the same. [Background Technology]

[0002] Hand dryers generally fall into two main categories: heating type and high-speed air drying type. Heating-based hand dryers typically have a high heating power, exceeding 1000W, while the motor power is very low, less than 200W. The typical characteristic of this type of hand dryer is its high air temperature, relying on the high-temperature airflow to remove moisture from the hands. This method dries hands relatively slowly, generally taking more than 30 seconds. High-speed air dryers are characterized by extremely high air speeds, reaching over 130 meters per second, drying hands in about 10 seconds. Their heating power is also relatively low, only a few hundred watts. The heating function is primarily for maintaining comfort and does not significantly affect the drying speed. However, the high air speed generates more noise.

[0003] Hand dryers are currently widely used, generally in office buildings and public places, and are installed in either wall-mounted or sink-mounted configurations.

[0004] In existing technologies, high-speed air-drying hand dryers typically have few heating devices. Hand dryers that do include heating devices, such as the wall-mounted type disclosed in Chinese patent application CN203354447U, have a single heating wire winding, which is relatively large and can only heat a specific area, making them unsuitable for smaller hand dryers that require heating multiple areas.

[0005] Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. [Summary of the Invention]

[0006] The purpose of this invention is to provide a heating device and a hand dryer including the same.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] A heating device includes at least two heating elements spaced apart, each of the heating elements including a support plate and a heating assembly connected to the support plate;

[0009] The location of the heating element can form an airflow passage that communicates with the spaced area between at least two of the heating elements.

[0010] In this design, the heating device includes at least two heating elements spaced apart, enabling heating of multiple areas. This makes it suitable for structures with a small overall size that require heating of multiple areas (such as hand dryers). Furthermore, the presence of an airflow path facilitates gas circulation, thereby reducing flow resistance and minimizing the impact on the airflow performance of the hand dryer. For example, when the heating device is applied to a hand dryer, it allows for heating with minimal disruption to airflow.

[0011] Preferably, the heating components of at least two of the heating elements are connected in series in the circuit.

[0012] In this solution, the above-mentioned structure is adopted, and the heating components of at least two heating parts are connected in series and then connected to the circuit. Compared with each heating component being connected to the circuit separately, this structure simplifies the circuit structure, makes the wiring simpler, and also reduces the overall space occupied by the heating device.

[0013] Preferably, the heating component is wound around the support plate, and a gap is formed between the inner side of the heating component and at least one side of the support plate to form the airflow passage.

[0014] In this design, the airflow passage can be formed between the support plate and the heating element on only one side, or between the support plate and the heating element on both sides. The latter method is more conducive to gas flow, thus ensuring the effective airflow of the hand dryer containing the heating device.

[0015] Preferably, a gap is formed between the inner side of the heating component and the two sides of the support plate to form the airflow passage.

[0016] Preferably, the heating component is wound around the outside of the support plate along its length, so that the airflow passage extends parallel to the length of the support plate.

[0017] In this solution, the above-mentioned structural configuration makes the structure of the heating component relatively simple and facilitates gas flow, thereby helping to ensure the air output effect of the hand dryer containing the heating device.

[0018] Preferably, the heating component further includes a mounting plate, the first ends of the mounting plates of adjacent heating components are connected, and the support plate is disposed on the mounting plate and located at the second end of the mounting plate.

[0019] In this solution, on the one hand, the mounting plate can support the heating components and the support plate, which helps to improve the overall strength of the heating device. In addition, it can also provide a mounting carrier for other accessories, such as the protective elements and temperature sensors described below. On the other hand, the mounting plates of adjacent heating components are connected, which helps to connect these heating components into one unit and facilitates installation.

[0020] Preferably, the heating component further includes a heat insulation element, and the heat insulation element is provided on the outer cover of each heating component.

[0021] In this solution, the heat insulation element can prevent the heat generated by the heating component from spreading to the outside, which can not only prevent energy waste and improve the heating effect, but also reduce or even prevent damage to the external structure.

[0022] Preferably, the support plate and the mounting plate are interlocked, such that the support plate extends from one side of the mounting plate to the other side of the mounting plate;

[0023] The heat insulation element is a sleeve structure, and the heat insulation element is sleeved on the second end of the mounting plate. The heating component and the support plate are located inside the heat insulation element.

[0024] In this design, the support plate and mounting plate are interlocked, a simple connection method that provides ample space for mounting the connecting components. Furthermore, the thermal insulation element is designed as a sleeve structure, facilitating both connection to the mounting plate and connection to external structures. Additionally, placing the thermal insulation element on the end of the mounting plate with the heating components helps reduce the weight of the heating device and lower material consumption.

[0025] Preferably, a gap is formed between one end of the heating assembly near the inner wall of the heat insulation element and the inner wall of the heat insulation element.

[0026] In this design, a gap is formed between the heating element and the insulation element, which can prevent the heating element from being damaged by friction between the heating element and the insulation element, and also helps to increase the airflow passage, thereby reducing airflow resistance.

[0027] Preferably, the heat insulation element is made of mica.

[0028] In this design, mica exhibits good thermal insulation, electrical insulation, and chemical stability, which helps ensure the overall stability and reliability of the heating device.

[0029] Preferably, the heating component further includes a protective device disposed on the mounting plate, the protective device including a temperature sensor, a control element, and a protective element;

[0030] The temperature sensor is used to detect temperature, and when the detected temperature exceeds a threshold, it generates a temperature signal and transmits the temperature signal to the control element. The control element acts on the protection element to switch the heating component from an active state to an inactive state.

[0031] In this solution, the protection device can switch the heating component to an inactive state when a high temperature is detected, thereby controlling the temperature within a preset range. This helps ensure the overall safety of the hand dryer, including the heating device, and also helps to extend the service life of the hand dryer.

[0032] Preferably, the protective element is a temperature control switch or a fuse.

[0033] In this solution, the fuse is smaller and requires less space, but it needs to be replaced after it blows. The temperature control switch can be reused, but it is larger than the fuse and requires more space.

[0034] Preferably, the protective element is located on the mounting plate;

[0035] Alternatively, the mounting plate may have a receiving groove, and the bottom of the support plate may have a clearance groove at a position corresponding to the receiving groove. At least a portion of the protective element may be disposed in the receiving groove, and the protective element may be located within the space enclosed by the receiving groove and the clearance groove.

[0036] In this design, depending on the actual setup requirements, the protective element can be directly mounted on the mounting plate or placed within a receiving slot on the mounting plate. The combination of the clearance slot and the receiving slot reduces the required mounting plate thickness and improves space utilization.

[0037] The present invention also provides a heating device, comprising:

[0038] Mounting plate, wherein the mounting plate is provided with a connecting structure;

[0039] At least two support plates, with the at least two support plates spaced apart on the mounting plate;

[0040] At least two heating components are wound one-to-one around at least two support plates.

[0041] In this design, the connection structure on the mounting plate facilitates the connection between the heating device and the external structure, thereby securing the heating device. At least two heating components are mounted on at least two spaced-apart support plates, enabling heating of multiple areas. This design is suitable for structures with a relatively small overall size that require multi-area heating (such as hand dryers).

[0042] The present invention also provides a hand dryer, comprising:

[0043] case;

[0044] At least two air outlet duct assemblies, the air outlet duct assemblies being in communication with the housing, the air outlet duct assemblies having air outlets, and the at least two air outlet duct assemblies being spaced apart; and

[0045] In the above-mentioned heating device, the heating element is disposed adjacent to the corresponding air outlet duct assembly, and the heating element and the air outlet are at least partially offset, and the interval area between at least two heating elements and the interval area between at least two air outlet duct assemblies at least partially overlap;

[0046] The airflow passage connects the housing and the air outlet.

[0047] In this design, airflow from inside the casing enters the air outlet duct assembly and heating assembly through overlapping or partially overlapping intervals. Under the influence of the airflow pathway, it reaches the air outlet, reducing resistance during gas flow. The heating assembly's placement essentially does not obstruct airflow and does not affect the hand dryer's airflow performance. As mentioned earlier, the heating device is suitable for hand dryers with a small overall size that require heating in multiple areas. Therefore, a hand dryer incorporating this heating device can achieve heating in multiple areas, and the hand dryer can be designed to be relatively small in overall size.

[0048] Preferably, the housing includes a main housing and a steering housing, the steering housing is connected to the top sidewall of the main housing, and an air outlet is formed at the end of the steering housing away from the main housing; at least two air outlet duct assemblies are respectively connected to the air outlet, the heating component is at least partially offset from the air outlet, the airflow passage connects the air outlet and the air outlet; the heating component is located inside the air outlet duct assembly.

[0049] In this design, the heating element and the air outlet are at least partially offset, meaning the heating element has minimal or no obstruction of the airflow from the main housing. This allows for heating while maintaining the hand dryer's airflow performance. Furthermore, placing the heating element within the air outlet duct assembly rather than the main housing facilitates a more compact design.

[0050] Preferably, the heating element is completely offset from the air outlet.

[0051] In this design, the heating element and the air outlet are completely offset, meaning that the heating element does not restrict the airflow at all, which helps to further ensure the airflow effect of the hand dryer.

[0052] Preferably, the hand dryer further includes a connector that connects and communicates between the air outlet duct assembly and the air outlet opening, and the heating element is located within a receiving cavity inside the connector.

[0053] In this solution, the connector supports the heating component, which facilitates the staggered arrangement of the heating component with the air outlet and air opening. In addition, the connector also strengthens the heating component.

[0054] Preferably, there is a gap between the top of the heating element and the wall of the accommodating cavity.

[0055] In this solution, the above-mentioned structural design can reduce or avoid friction between the heating element and the connector, which is beneficial to protecting the heating element. On the other hand, the gap is also conducive to airflow, which helps to ensure the air outlet effect and facilitates the control of the temperature inside the hand dryer.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] In this invention, the heating device includes at least two heating elements spaced apart, enabling heating of multiple areas and making it suitable for structures with a small overall volume that require heating of multiple areas (such as hand dryers). Furthermore, the presence of an airflow passage between the heating element and the support plate facilitates gas flow, thereby reducing flow resistance and minimizing its impact on the hand dryer's airflow performance. Furthermore, placing the heating element within the air outlet duct assembly rather than within the main housing of the hand dryer facilitates miniaturization of the hand dryer design.

[0058] In this invention, airflow from inside the housing enters the air outlet duct assembly and heating assembly through overlapping or partially overlapping intervals. Under the influence of the airflow pathway, it reaches the air outlet, reducing resistance during gas flow. The heating assembly essentially does not obstruct airflow and does not affect the hand dryer's airflow performance. Furthermore, the hand dryer incorporating the aforementioned heating device can achieve heating in multiple areas, and the hand dryer can be configured to have a relatively small overall size. [Attached Image Description]

[0059] Figure 1 This is a schematic diagram of the heating device according to Embodiment 1 of the present invention.

[0060] Figure 2 This is another structural schematic diagram of the heating device of Embodiment 1 of the present invention.

[0061] Figure 3 This is another structural schematic diagram of the heating device of Embodiment 1 of the present invention.

[0062] Figure 4 This is a partial structural schematic diagram of the heating device according to Embodiment 1 of the present invention.

[0063] Figure 5 This is a schematic diagram of the hand dryer according to Embodiment 1 of the present invention.

[0064] Figure 6 yes Figure 5 A magnified structural diagram of part A in the middle.

[0065] Figure 7 This is another structural diagram of a hand dryer, showing the airflow path.

[0066] Explanation of reference numerals in the attached figures:

[0067] 10 Heating devices

[0068] 101 heating element

[0069] 102 support plate

[0070] 1021 First Mounting Slot

[0071] 103 mounting plate

[0072] 1031 First End

[0073] 1032 second end

[0074] 1033 Second Mounting Slot

[0075] 104 thermal insulation element

[0076] 105 Temperature Sensor

[0077] 106 protection components

[0078] 107 accommodating slot

[0079] 108 clearance slots

[0080] 20 main shell

[0081] 30 Steering Housing

[0082] 40 air outlet duct assembly

[0083] 50 connectors

[0084] 60 fixed plate

[0085] 601 card slot

[0086] 70 Internal air source

[0087] 80 Fastening Plate

Detailed Implementation Methods

[0088] Example 1

[0089] like Figure 1-4 As shown, this embodiment discloses a heating device 10, which includes at least two heating components spaced apart. Each heating component includes a support plate 102 and a heating assembly 101 connected to the support plate 102. An airflow passage communicating with the spaced area between the heating components can be formed at the location of the heating components.

[0090] In this embodiment, the heating device 10 includes at least two heating elements spaced apart, enabling heating of multiple areas and making it suitable for structures with a small overall volume that require heating of multiple areas (such as hand dryers). Furthermore, the presence of an airflow passage facilitates gas flow, thereby reducing flow resistance and minimizing the impact on the airflow performance of the hand dryer. For example, when the heating device 10 is applied to a hand dryer, it facilitates heating with minimal impact on airflow. An airflow passage refers to a path through which airflow can flow from one side of the heating element to the other. This path can be formed either by the gap between the heating element 101 and other components, such as the support plate 102, or by gaps inherent in the structure of the heating element itself. Because the heating elements are spaced apart, airflow can flow through these gaps to the heating elements, meaning that when the heating device is placed in the hand dryer, an airflow path can be formed from the gaps between the heating elements to the heating elements.

[0091] It should be noted that, Figure 1-4 The diagram shows two heating elements. In practice, depending on the actual design requirements, the number of heating elements can be set to three or more.

[0092] In a preferred embodiment, heating components 101 of at least two heating elements are connected in series to the circuit.

[0093] In this configuration, the heating components 101 in at least two heating elements are connected in series and then connected to the circuit. Compared to each heating component 101 being connected to the circuit individually, this configuration simplifies the circuit structure, makes the wiring simpler, and also reduces the overall space occupied by the heating device 10.

[0094] In another preferred embodiment, such as Figure 1-4 As shown, the heating element 101 is wound around the support plate 102, and a gap is formed between the inner side of the heating element 101 and at least one side of the support plate 102 to form an airflow passage. In addition, when the heating device 10 is placed in the hand dryer, an airflow passage may also be formed between the heating element and the housing of the hand dryer.

[0095] The airflow passage can be formed between the support plate 102 and the heating component on only one side, or it can be formed between the support plate 102 and the heating component on both sides. Compared to the former, the latter is more conducive to the flow of gas, thereby helping to ensure the airflow effect of the hand dryer containing the heating device 10.

[0096] In another preferred embodiment, a gap is formed between the inner side of the heating component 101 and the two sides of the support plate 102 to form an airflow passage.

[0097] In another preferred embodiment, the heating component 101 is wound around the outside of the support plate 102 along the length direction of the support plate 102, so that the airflow passage extends parallel to the length direction of the support plate 102.

[0098] With the above-mentioned structural design, the heating component has a relatively simple structure and facilitates gas flow, which in turn helps to ensure the air output effect of the hand dryer containing the heating device 10.

[0099] In another preferred embodiment, the heating component further includes a mounting plate 103, with the first ends 1031 of the mounting plates 103 of adjacent heating components connected, and a support plate 102 disposed on the mounting plate 103 and located at the second end 1032 of the mounting plate 103. Specifically, refer to... Figure 1-4 As shown, the mounting plates 103 of each heating component can be assembled into a single plate structure.

[0100] On the one hand, the mounting plate 103 can support the heating component 101 and the support plate 102, which helps to improve the overall strength of the heating device 10. In addition, it can also provide a mounting carrier for other accessories, such as the protective element 106 and the temperature sensor 105 described below. On the other hand, the mounting plates 103 of adjacent heating components are connected, which helps to connect these heating components into one unit and facilitates installation.

[0101] In another preferred embodiment, the heating component further includes a heat insulation element 104, and the outer cover of each heating component 101 is provided with a heat insulation element 104.

[0102] The heat insulation element 104 can prevent the heat generated by the heating component 101 from spreading to the outside, which can not only prevent energy waste and improve the heating effect, but also reduce or even prevent damage to the external structure.

[0103] It should be noted that the thermal insulation element 104 can be made of any suitable thermal insulation material.

[0104] In another preferred embodiment, such as Figure 1-4As shown, the support plate 102 and the mounting plate 103 are interlocked, so that the support plate 102 extends from one side of the mounting plate 103 to the other side of the mounting plate 103; the support plate 102 and the mounting plate 103 form an X-shaped mounting frame, which forms an airflow passage consisting of four basically spaced spaces. The heating component 101 can specifically be an electric heating wire, and both the support plate 102 and the mounting plate 103 can be provided with mounting grooves (such as...). Figure 4 As shown, the mounting groove on the support plate 102 is schematically designated as the first mounting groove 1021, and the mounting groove on the mounting plate 103 is schematically designated as the second mounting groove 1033, for winding an electric heating wire. Half of the structure after the electric heating wire is wound also has gaps, which can form part of the fluid passage. The heating component 101 can also be a PTC heating element, an electric heating tube, or other structures. The heating device can also include multiple support plates 102, in which case the cross-sectional shape of the mounting frame formed by the support plates 102 and the mounting plates 103 will also change accordingly.

[0105] The heat insulation element 104 is a sleeve structure, and the heat insulation element 104 is sleeved on the second end of the mounting plate 103. The heating component 101 and the support plate 102 are located inside the heat insulation element 104.

[0106] The support plate 102 and the mounting plate 103 are interlocked, a simple connection method that provides ample space for mounting the connecting components. Furthermore, the heat insulation element 104 is designed as a sleeve structure, facilitating both connection to the mounting plate 103 and connection to external structures. Positioning the heat insulation element 104 at the end of the mounting plate 103 with the heating component 101 also helps reduce the weight of the heating device 10 and lower material consumption.

[0107] It should be noted that in other alternative embodiments, the heat insulation element 104 can be configured with other structures. In addition, the heat insulation element 104 can also be disposed within the entire extension range of the mounting plate 103.

[0108] In optional embodiments, such as Figure 2-3 As shown, the heat insulation element 204 can be configured as an integral structure with the support plate 102 and the mounting plate 103.

[0109] In another preferred embodiment, a gap is formed between one end of the heating assembly 101 near the inner wall of the heat insulation element 104 and the inner wall of the heat insulation element 104.

[0110] The gap between the heating component 101 and the heat insulation element 104 can prevent friction between the heating component 101 and the heat insulation element 104 from damaging the heating component 101, and can also increase the airflow passage, thereby reducing airflow resistance.

[0111] In another preferred embodiment, the heat insulation element 104 is made of mica.

[0112] Among them, mica has good thermal insulation, electrical insulation and chemical stability, which helps to ensure the overall stability and reliability of heating device 10.

[0113] In another preferred embodiment, the heating component further includes a protective device disposed on the mounting plate 103, the protective device including a temperature sensor 105, a control element and a protective element 106;

[0114] The temperature sensor 105 is used to detect temperature and generate a temperature signal when the detected temperature exceeds a threshold. The temperature signal is then transmitted to the control element, which acts on the protection element 106 to switch the heating assembly 101 from an active state to an inactive state.

[0115] The protection device can switch the heating component 101 to an inactive state when a high temperature is detected, thereby controlling the temperature within a preset range. This helps ensure the overall safety of the hand dryer, including the heating device 10, and also helps to improve the service life of the hand dryer.

[0116] In another preferred embodiment, the protection element 106 is a temperature control switch or a fuse.

[0117] Among them, fuses are smaller in size and require less space, but they need to be replaced after they blow. Temperature control switches can be reused, but they are larger in size than fuses and require relatively more space.

[0118] In another preferred embodiment, the mounting plate 103 is provided with a receiving groove 107, and the bottom of the support plate 102 is provided with a relief groove 108 at a position corresponding to the receiving groove 107. At least a portion of the protective element 106 is provided in the receiving groove 107, and the protective element 106 is located in the space enclosed by the receiving groove 107 and the relief groove 108.

[0119] The combination of the clearance groove 108 and the receiving groove 107 can reduce the thickness requirement of the mounting plate 103 and improve the space utilization rate.

[0120] It should be noted that, in other alternative embodiments, the protective element 106 may also be directly mounted on the mounting plate 103.

[0121] like Figure 2 and Figure 3 As shown, a temperature sensor is provided on the mounting plate 103 of one heating component, and a protective element 106 (a fuse is schematically shown in the figure) is provided in the receiving groove 107 of the mounting plate 103 of the other heating component.

[0122] like Figure 5-7 As shown, the present invention also provides a hand dryer, which includes a housing, at least two air outlet duct assemblies 40, and the aforementioned heating device 10. The air outlet duct assembly 40 is connected to the housing, and an air outlet (not shown) is provided on the air outlet duct assembly 40. At least two air outlet duct assemblies 40 are spaced apart. Heating components are disposed adjacent to corresponding air outlet duct assemblies 40, and the heating components and air outlets are at least partially offset. The spacing between the at least two heating components at least partially overlaps with the spacing between the at least two air outlet duct assemblies 40. An airflow passage connects the housing and the air outlet.

[0123] Figure 5 Two air outlet duct assemblies 40 are schematically shown. It should be understood that in other alternative embodiments, three or more may be provided, depending on actual design requirements.

[0124] The airflow originating from inside the casing enters the air outlet duct assembly 40 and the heating assembly 101 through overlapping or partially overlapping intervals. Under the influence of the airflow pathway, it reaches the air outlet, reducing resistance during gas flow. The heating assembly 101 essentially does not obstruct airflow and does not affect the airflow performance of the hand dryer. As mentioned above, the heating device 10 is suitable for hand dryers with a small overall size that require heating in multiple areas. Therefore, a hand dryer including this heating device 10 can achieve heating in multiple areas, and the hand dryer can be configured to be a small-sized hand dryer.

[0125] In another preferred embodiment, such as Figure 5-7 As shown, the housing includes a main housing 20 and a steering housing 30. The steering housing 30 is connected to the top side wall of the main housing 20. An air outlet opening is formed at the end of the steering housing 30 away from the main housing 20 (not shown in the figure). At least two air outlet duct assemblies 40 are respectively connected to the air outlet opening. The heating component is at least partially offset from the air outlet opening. The airflow passage connects the air outlet and the air outlet opening. The heating component 101 is located inside the air outlet duct assembly 40.

[0126] The heating element and the air outlet are at least partially offset, meaning that the heating element has little or no obstruction effect on the airflow from the main housing 20. This allows the heating function to be achieved while ensuring the airflow effect of the hand dryer. In addition, placing the heating element 101 inside the air outlet duct assembly 40 rather than inside the main housing 20 of the hand dryer facilitates the miniaturization design of the hand dryer.

[0127] Figure 7The diagram schematically illustrates the airflow path within the hand dryer. Specifically, in this embodiment, an air inlet is located at the bottom of the main housing. An internal air source 70 within the main housing 20 generates airflow. The airflow enters the flow channel within the main housing through the air inlet, then flows into the flow channel of the deflector housing 30, and finally exits through the airflow passage to the air outlet. The internal air source 70 primarily provides airflow and can be an existing airflow-generating device such as a fan or air pump. The internal air source 70 is fixed inside the main housing 20 and can be driven by an external power supply or a built-in power supply. The dashed lines with arrows schematically indicate the direction of airflow ejection.

[0128] In another preferred embodiment, the heating element is completely offset from the air outlet.

[0129] The heating element and the air outlet are completely offset, which means that the heating element will not restrict the airflow at all, thus helping to further ensure the airflow effect of the hand dryer.

[0130] In another preferred embodiment, the hand dryer further includes a connector 50 that connects and communicates between the air outlet duct assembly 40 and the air outlet opening, with the heating element located within a receiving cavity inside the connector 50.

[0131] The connector 50 carries the heating component, which facilitates the staggered arrangement of the heating component with the air outlet and air opening. In addition, the connector 50 can also strengthen the heating component.

[0132] It should be noted that the heating device 10 is connected to the connector 50. In fact, the heating device 10 can be fastened to the receiving cavity of the connector by any applicable connection method (preferably by a detachable connection method). Figure 6 The diagram schematically illustrates a connection method using a fastening plate 80. The mounting plate 103 has a fastening plate 80 with fastening holes 801. Fasteners pass through the fastening holes 801 and the connection holes on the connector 50 to connect the heating device 10 to the connector 50. Additionally, the hand dryer includes a fixing plate 60, which primarily serves to assemble the connector 50's own structure, such as... Figure 6 As shown, the two ends of the fixing plate 60 are supported between the inner walls of the two sides of the connector 50 along the radial direction of the connector 50. The fixing plate 60 is provided with a slot 601, and the mounting plate 103 of the heating device 10 is locked in the slot 601. Therefore, the fixing plate 60 can also improve the reliability of the connection between the heating device 10 and the connector 50.

[0133] In another preferred embodiment, there is a gap between the top of the heating element and the wall of the receiving cavity.

[0134] The above-mentioned structural design reduces or avoids friction between the heating element and the connector, which helps protect the heating element. On the other hand, the gap also facilitates airflow, which helps ensure the air output effect and makes it easier to control the temperature inside the hand dryer.

[0135] In this invention, the heating device 10 includes at least two heating elements spaced apart, enabling heating of multiple areas and making it suitable for structures with a small overall volume that require heating of multiple areas (such as hand dryers). Furthermore, the presence of an airflow passage between the heating element 101 and the support plate 102 facilitates gas flow, thereby reducing flow resistance and minimizing the impact on the hand dryer's airflow performance. Additionally, in this invention, airflow from inside the housing enters the air outlet duct assembly 40 and the heating element 101 through overlapping or partially overlapping intervals. Under the influence of the airflow passage, it reaches the air outlet, reducing resistance during gas flow. The heating element 101 essentially does not obstruct airflow and does not affect the hand dryer's airflow performance. Moreover, the hand dryer including the heating device 10 can achieve heating of multiple areas, and the hand dryer can be configured to have a small overall volume.

[0136] Example 2

[0137] This embodiment discloses a heating device, such as Figure 1-4 As shown, the heating device 10 includes a mounting plate 103, at least two support plates 102, and at least two heating components. The mounting plate 103 has a connecting structure. The at least two support plates 102 are spaced apart on the mounting plate 103. The at least two heating components are wound one-to-one around the at least two support plates 102. Figure 1-4 Only two support plates 102 and two heating components are schematically shown in the diagram.

[0138] In this embodiment, the connection structure on the mounting plate 102 facilitates the connection between the heating device and an external structure (such as the connector in Embodiment 1 above) to fix the heating device. At least two heating components are disposed on at least two spaced-apart support plates, thus enabling heating of multiple areas. This design is suitable for structures with a small overall volume that require heating of multiple areas (such as hand dryers).

[0139] It should be noted that all structural features of the heating device 10 disclosed in Example 1 are applicable here.

[0140] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A hand dryer, characterized in that, It comprises: a shell; at least two air outlet pipe assemblies which are in communication with the shell, and are provided with air outlets, and are spaced apart; a heating device which comprises at least two heating components which are spaced apart, each of the heating components comprises a support plate and a heating assembly connected to the support plate, and the heating components are located at positions which can form an air flow passage in communication with the spacing areas of the at least two heating components; the heating components are arranged adjacent to the corresponding air outlet pipe assemblies, and the heating components are at least partially staggered with the air outlets, and the spacing areas of the at least two heating components at least partially coincide with the spacing areas of the at least two air outlet pipe assemblies; wherein the air flow passage is in communication between the shell and the air outlets; the shell comprises a main shell and a turning shell, the turning shell is connected to the top side wall of the main shell, and the end of the turning shell away from the main shell forms an air outlet opening; the at least two air outlet pipe assemblies are respectively in communication with the air outlet opening, the heating components are at least partially staggered with the air outlet opening, and the air flow passage is in communication between the air outlets and the air outlet opening; the hand dryer further comprises a connecting piece which is connected and in communication between the air outlet pipe assemblies and the air outlet opening, and the heating components are located in the accommodating cavity inside the connecting piece.

2. The hand dryer of claim 1, wherein: The heating assemblies of the at least two heating components are connected in series in the circuit.

3. The hand dryer of claim 1, wherein: The heating assembly is wound on the support plate, and the inner side of the heating assembly and at least one side of the support plate form a gap to form the air flow passage.

4. The hand dryer of claim 3, wherein: The inner side of the heating assembly and both sides of the support plate form a gap to form the air flow passage.

5. The hand dryer of claim 3, wherein: The heating assembly is wound on the outside of the support plate along the length direction of the support plate, so that the extension direction of the air flow passage is parallel to the length direction of the support plate.

6. The hand dryer of claim 1, wherein, The heating component further comprises a mounting plate, the first ends of the mounting plates of adjacent heating components are connected, the support plate is arranged on the mounting plate and located at the second end of the mounting plate.

7. The hand dryer of claim 6, wherein: The heating component further comprises a heat insulation element, and the outside of each heating assembly is covered with the heat insulation element.

8. The hand dryer of claim 7, wherein: The support plate and the mounting plate are inserted to extend the support plate from one side of the mounting plate to the other side of the mounting plate; The heat insulation element is in a sleeve structure, the heat insulation element is sleeved on the second end of the mounting plate, and the heating assembly and the support plate are located inside the heat insulation element.

9. The hand dryer of claim 8, wherein: The end of the heating assembly close to the inner wall of the heat insulation element and the inner wall of the heat insulation element form a gap.

10. The hand dryer of claim 7, wherein: The heat insulation element is made of mica.

11. A hand dryer as claimed in any one of claims 6 to 10 wherein: The heating component further comprises a protection device arranged on the mounting plate, and the protection device comprises a temperature sensor, a control element and a protection element. The temperature sensor is configured to detect temperature and generate a temperature signal when the detected temperature exceeds a threshold value, and the control element is configured to act on the protection element to switch the heating assembly from an active state to an inactive state.

12. The hand dryer of claim 11, wherein: The protection element is a temperature control switch or a fuse.

13. The hand dryer of claim 11, wherein: The protection element is arranged on the mounting plate. Alternatively, the mounting plate is provided with a receiving groove, the bottom of the support plate is provided with an avoiding groove at a position corresponding to the receiving groove, at least a part of the protection element is arranged in the receiving groove, and the protection element is located in a space surrounded by the receiving groove and the avoiding groove.

14. The hand dryer of claim 1, wherein: The heating assembly is completely staggered with the air outlet.

15. The hand dryer of claim 1, wherein: The top of the heating component has a gap with the wall surface of the receiving cavity.

16. A hand dryer, characterized in that It comprises: a housing; at least two air outlet duct assemblies, which are in communication with the housing, and are provided with air outlets, and are arranged at intervals; and a heating device, which comprises a mounting plate provided with a connecting structure, at least two support plates arranged at intervals on the mounting plate, and at least two heating assemblies corresponding to the support plates; The heating device is arranged adjacent to the corresponding air outlet duct assembly, and the heating device is at least partially staggered with the air outlet, and the interval region of the heating assembly at least partially coincides with the interval region of the air outlet duct assembly; The airflow passage is communicated between the housing and the air outlet. The housing comprises a main housing and a turning housing, the turning housing is connected to the top side wall of the main housing, and the end of the turning housing away from the main housing forms an air outlet opening; at least two air outlet duct assemblies are respectively communicated with the air outlet opening, the heating device is at least partially staggered with the air outlet opening, and the airflow passage is communicated between the air outlet and the air outlet opening. The dryer further comprises a connecting piece connected and communicated between the air outlet duct assembly and the air outlet opening, and the heating device is located in the receiving cavity inside the connecting piece.

17. The hand dryer of claim 16, wherein: The heating assembly is located in the air outlet duct assembly.

18. The hand dryer of claim 16, wherein: The heating assembly is completely staggered with the air outlet.

19. The hand dryer of claim 16, wherein: The top of the heating device has a gap with the wall surface of the receiving cavity.

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