CN216317305U - Heating device and hand dryer comprising same - Google Patents

Abstract

The utility model discloses a heating device and a hand dryer comprising the same. The heating device comprises at least two heating parts arranged at intervals, and each heating part comprises a supporting plate and a heating assembly connected to the supporting plate. The heating parts are positioned to form an air flow passage communicated with the interval area of at least two heating parts. The hand dryer includes: a housing; the air outlet pipeline components are communicated with the shell and provided with air outlets, and the air outlet pipeline components are arranged at intervals; heating device, the heater block is close to the air-out pipeline subassembly setting that corresponds, and heater block and air outlet at least part stagger the setting, and the interval region of two at least heater blocks and at least partial coincidence in interval region of two at least air-out pipeline subassemblies. The airflow passage is communicated between the shell and the air outlet. The air current reaches the air outlet through the interval region of coincidence or partial coincidence, and the setting of heating element can not block the flow of air current basically, can not influence the air-out effect of hand dryer.

Description

Heating device and hand dryer comprising same

[ technical field ] A method for producing a semiconductor device

The utility model relates to the field of hand dryers, in particular to a heating device and a hand dryer comprising the same.

[ background of the utility model ]

Hand dryers generally mainly include a heating type and a high-speed air drying type. The hand dryer mainly heated usually has a relatively high heating power of over 1000W and a very low motor power of less than 200W, and the hand dryer is typically characterized in that the air temperature is very high, water on the hands is taken away by means of relatively high-temperature air, and the hand dryer is relatively slow in hand drying and generally has a time of over 30 seconds. The high-speed air type hand dryer is characterized in that the air speed is very high and can reach more than 130 m/s, the hand drying speed is about 10 s, the heating power is low and is only hundreds of watts, the heating function is only to keep the comfort level, and the hand drying speed is not influenced basically. However, the noise generated by the high wind speed is relatively large.

The hand dryer is widely used at present, is generally applied to office buildings and public places, and is mounted in a wall-mounted or water tank type.

Among them, in the prior art, the high-speed air drying type hand dryer is generally rarely provided with a heating device. However, the hand dryer including a heating device, such as the hand dryer disclosed in the chinese patent application with publication number CN203354447U, has a wall-hanging structure, and the heating wire structure thereof is a heating wire winding, which has a large volume, and can only heat a certain whole area, and is not suitable for a hand dryer with a small whole volume and requiring multi-area heating.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

[ Utility model ] content

The utility model aims to provide a heating device and a hand dryer comprising the same.

The purpose of the utility model is realized by the following technical scheme:

a heating device comprises at least two heating parts arranged at intervals, wherein each heating part comprises a supporting plate and a heating assembly connected to the supporting plate;

the heating parts are positioned to form an air flow passage communicated with the interval area of at least two heating parts.

In this scheme, heating device includes two at least heater block that the interval set up to can realize the heating to a plurality of regions, can be applicable to in the structure (like hand dryer) that whole volume is less and need multizone heating. In addition, the air flow passage is convenient for realizing the circulation of air, thereby being beneficial to reducing the flow resistance and reducing the influence on the air outlet effect of the hand dryer. For example, when the heating device is applied to a hand dryer, it is advantageous to achieve heating with less influence on the flow of the air stream.

Preferably, the heating assemblies of at least two of the heating members are connected in series into an electrical circuit.

In this scheme, adopt above-mentioned structural setting, the heating element in two at least heater blocks establishes ties earlier then inserts the circuit, compares in each heating element access circuit alone, and this structure is favorable to simplifying circuit structure, walks that the line is comparatively simple, also is favorable to reducing the whole space that occupies of heating device.

Preferably, the heating assembly is wound around the support plate, and an inner side of the heating assembly is formed with a gap from at least one side of the support plate to form the air flow path.

In this case, the air flow path may be formed between only one side of the support plate and the heating unit, or between both sides of the support plate and the heating unit. Wherein, compare in the former, the latter is more favorable to realizing gaseous circulation, and then is favorable to guaranteeing the air-out effect that contains this heating device's hand dryer.

Preferably, gaps are formed between the inner side of the heating assembly and both sides of the support plate to form the air flow path.

Preferably, the heating assembly is wound outside the support plate in a length direction of the support plate such that the air flow passage extending direction is parallel to the length direction of the support plate.

In this scheme, adopt above-mentioned structure setting, the structure of heater block is comparatively simple, also is convenient for realize gaseous circulation, and then is favorable to guaranteeing the air-out effect that contains this heating device's hand dryer.

Preferably, the heating member further comprises a mounting plate, a first end of the mounting plate of the adjacent heating member is connected, and the supporting plate is arranged on the mounting plate and located at a second end of the mounting plate.

In the scheme, on one hand, the mounting plate can support the heating assembly and the support plate, which is beneficial to improving the overall strength of the heating device, and in addition, mounting carriers can also be provided for other accessories, such as a protection element, a temperature sensor and the like which are described below; on the other hand, the mounting plates of the adjacent heating parts are connected, so that the heating parts are connected into a whole, and the mounting is facilitated.

Preferably, the heating member further comprises a heat insulating member, the heat insulating member being provided to an outer cover of each of the heating units.

In this scheme, thermal-insulated component can prevent that the heat that heating element produced from diffusing to the outside, can enough prevent the waste of the energy, improves the heating effect, can also reduce or even prevent the damage to external structure.

Preferably, the support plate and the mounting plate are spliced, so that the support plate extends from one side of the mounting plate to the other side of the mounting plate;

the heat insulating element is of a sleeve structure, the heat insulating element is sleeved at the second end of the mounting plate, and the heating assembly and the supporting plate are located inside the heat insulating element.

In this scheme, backup pad and mounting panel are pegged graft mutually, and both connected mode is simple, and both connect the back and can provide more accommodation space and set up coupling assembling. In addition, the heat insulation element is arranged in a sleeve structure, so that connection with the mounting plate and connection with an external structure are facilitated. Simultaneously, with the one end that has heating element of thermal-insulated component setting at the mounting panel, also be favorable to alleviateing heating device's weight, reduce the consumptive material.

Preferably, a gap is formed between an end of the heating assembly proximate the inner wall of the insulating element and the inner wall of the insulating element.

In this scheme, be formed with the clearance between heating element and the thermal-insulated component, can enough prevent to produce the friction and damage heating element between heating element and the thermal-insulated component, be favorable to increasing the air current route again, and then be favorable to reducing the air current resistance.

Preferably, the insulating element is made of mica.

In this scheme, mica's heat-proof quality, insulating properties and chemical stability are all better, are favorable to guaranteeing heating device's overall stability and reliability.

Preferably, the heating component further comprises a protection device arranged on the mounting plate, wherein the protection device comprises a temperature sensor, a control element and a protection element;

wherein the temperature sensor is configured to detect a temperature and to generate a temperature signal and to transmit the temperature signal to the control element when the detected temperature exceeds a threshold value, the control element being configured to act on the protection element to switch the heating assembly from an active state to an inactive state.

In this scheme, protection device can make heating element switch to the non-activated state when detecting that the temperature is higher to can be in predetermineeing the within range with temperature control, be favorable to guaranteeing the whole security including heating device's hand dryer, also be favorable to improving the life of hand dryer.

Preferably, the protection element is a temperature-controlled switch or a fusible link.

In the scheme, the fuse wire is small in size and small in space requirement, but the fuse wire needs to be replaced after being fused. The temperature control switch can be used repeatedly, but has a larger size and a relatively larger space requirement compared with a fuse wire.

Preferably, the protection element is positioned on the mounting plate;

or, the mounting plate is provided with a containing groove, the bottom of the supporting plate is provided with an avoiding groove at a position corresponding to the containing groove, at least one part of the protection element is arranged in the containing groove, and the protection element is positioned in a space surrounded by the containing groove and the avoiding groove.

In this scheme, according to the actual demand that sets up, the protection component can directly set up on the mounting panel, also can be with in the storage tank of protection component setting on the mounting panel. Wherein, dodge the cooperation of groove and storage tank, can enough reduce the demand of mounting panel thickness, can improve space utilization again.

The present invention also provides a heating device, comprising:

the mounting plate is provided with a connecting structure;

the at least two support plates are arranged on the mounting plate at intervals;

the heating device comprises at least two heating assemblies, wherein the at least two heating assemblies are wound on the at least two supporting plates in a one-to-one correspondence mode.

In this scheme, the connection structure on the mounting panel is convenient for realize heating device and exterior structure's connection to realize heating device's fixed. At least two heating element set up in two at least backup pads that the interval set up to two at least heating element intervals set up, can realize the heating to a plurality of regions, can be applicable to in the less and structure (like hand dryer) that need multizone heating of whole volume.

The present invention also provides a hand dryer comprising:

a housing;

the air outlet pipeline assemblies are communicated with the shell, air outlets are formed in the air outlet pipeline assemblies, and the air outlet pipeline assemblies are arranged at intervals; and

in the heating device, the heating parts are arranged adjacent to the corresponding air outlet pipeline assemblies, the heating parts and the air outlets are at least partially staggered, and the spacing areas of at least two heating parts are at least partially overlapped with the spacing areas of at least two air outlet pipeline assemblies;

wherein the airflow passage is communicated between the housing and the air outlet.

In this scheme, the air current that derives from the inside of casing gets into air-out pipeline subassembly and heating element through the interval region of coincidence or partial coincidence, under the effect of airflow channel, reachs the air outlet, can reduce the resistance of gas flow in-process, and the setting of heating element can not block the flow of air current basically, can not influence the air-out effect of hand dryer. As mentioned above, the heating device can be adapted to a hand dryer which has a small overall volume and requires multi-zone heating, and therefore, a hand dryer comprising the heating device can achieve multi-zone heating, and the hand dryer can be set to a hand dryer having a small overall volume.

Preferably, the housing comprises a main housing and a steering housing, the steering housing is connected to the top side wall of the main housing, and an air outlet opening is formed at one end of the steering housing away from the main housing; the at least two air outlet pipeline assemblies are respectively communicated with the air outlet opening, the heating component and the air outlet opening are at least partially arranged in a staggered mode, and the airflow passage is communicated between the air outlet and the air outlet opening; the heating assembly is positioned in the air outlet pipeline assembly.

In this scheme, the heater block sets up with the air-out opening is at least partially stagger, that is to say the heater block to the effect of blockking from the air current of the main casing body less, perhaps can not block the air current that comes from the main casing body at all, is favorable to realizing the heating function on the basis of guaranteeing hand dryer air-out effect. In addition, set up heating element in the air-out pipeline subassembly rather than in the hand dryer main casing, be favorable to the miniaturized design of hand dryer.

Preferably, the heating element and the air outlet are completely staggered.

In this scheme, the heater block staggers completely with the air outlet, means that the heater block can not restrict the air-out completely to, be favorable to further guaranteeing the air-out effect of hand dryer.

Preferably, the hand dryer further comprises a connecting piece, the connecting piece is connected and communicated with the air outlet pipeline assembly and the air outlet opening, and the heating component is located in the accommodating cavity inside the connecting piece.

In this scheme, the heater block is born to the connecting piece, is convenient for realize heater block and air outlet, the setting of staggering of air-out opening, and in addition, the connecting piece also can play the additional strengthening to the heater block.

Preferably, a gap is formed between the top of the heating component and the wall surface of the accommodating cavity.

In the scheme, the structure arrangement is adopted, so that on one hand, the friction between the heating part and the connecting piece can be reduced or avoided, and the heating part is protected; on the other hand, this clearance also is favorable to the circulation of air current, and then is favorable to guaranteeing the air-out effect, is convenient for control the inside temperature of hand dryer.

Compared with the prior art, the utility model has the following beneficial effects:

in the utility model, the heating device comprises at least two heating parts which are arranged at intervals, so that the heating of a plurality of areas can be realized, and the heating device can be suitable for a structure (such as a hand dryer) which has a small integral volume and needs multi-area heating. In addition, the existence of the airflow channel between the heating component and the supporting plate in the heating component is convenient for realizing the circulation of air, thereby being beneficial to reducing the flow resistance and reducing the influence on the air outlet effect of the hand dryer; set up heating element in the air-out pipeline subassembly rather than in the hand dryer owner casing, be favorable to the miniaturized design of hand dryer.

In the utility model, the airflow from the inside of the shell enters the air outlet pipeline assembly and the heating assembly through the overlapped or partially overlapped interval area and reaches the air outlet under the action of the airflow channel, so that the resistance in the air flowing process can be reduced, the heating assembly basically cannot block the flow of the airflow, and the air outlet effect of the hand dryer cannot be influenced. In addition, the hand dryer comprising the heating device can realize the heating of a plurality of areas, and the hand dryer can be set as a hand dryer with smaller overall volume.

[ description of the drawings ]

Fig. 1 is a schematic structural view of a heating apparatus according to embodiment 1 of the present invention.

Fig. 2 is another schematic structural view of the heating apparatus according to embodiment 1 of the present invention.

Fig. 3 is a schematic view of still another structure of the heating apparatus according to embodiment 1 of the present invention.

Fig. 4 is a partial structural schematic view of a heating apparatus according to embodiment 1 of the present invention.

Fig. 5 is a schematic view of the structure of the hand dryer of embodiment 1 of the present invention.

Fig. 6 is an enlarged schematic view of a portion a of fig. 5.

Figure 7 is a schematic view of another construction of the hand dryer showing the airflow flow path.

Description of reference numerals:

10 heating device

101 heating assembly

102 support plate

1021 first mounting groove

103 mounting plate

1031 first end

1032 second end

1033 second mounting groove

104 insulating element

105 temperature sensor

106 protective element

107 container

108 avoidance groove

20 main casing

30 steering housing

40 air outlet pipeline assembly

50 connecting piece

60 fixed plate

601 card slot

70 internal gas source

80 fastening plate

[ detailed description ] embodiments

Example 1

As shown in fig. 1-4, the present embodiment discloses a heating device 10, which includes at least two heating components disposed at intervals, each heating component includes a supporting plate 102 and a heating assembly 101 connected to the supporting plate 102. The heating parts are positioned to form an air flow passage communicated with the interval area of at least two heating parts.

In the present embodiment, the heating device 10 includes at least two heating components disposed at intervals, so as to heat a plurality of regions, and can be applied to a structure (such as a hand dryer) which has a small overall volume and needs multi-region heating. In addition, the air flow passage is convenient for realizing the circulation of air, thereby being beneficial to reducing the flow resistance and reducing the influence on the air outlet effect of the hand dryer. For example, when the heating apparatus 10 is applied to a hand dryer, it is advantageous to achieve heating with less influence on the flow of the air stream. An air flow path, which means that an air flow can flow from one side of the heating member to the other, can be formed by a gap between the heating assembly 101 and other members, such as the support plate 102; or may be formed by a gap provided in the structure of the heating member itself. Due to the spaced arrangement of the heating members, the airflow may flow towards the heating members via the spaced area, i.e. after the heating device is placed in the hand dryer, an airflow path may be formed from the spaced area of the heating members to the heating members.

It should be noted that the number of the heating members shown in fig. 1 to 4 is two. In fact, the number of the heating members may be set to three or more according to actual design requirements.

In a preferred embodiment, the heating elements 101 of at least two heating elements are connected in series in an electrical circuit.

Wherein, adopt above-mentioned structure setting, the heating element 101 among the at least two heater blocks is established ties earlier and then is inserted the circuit, compares in each heating element 101 and inserts the circuit alone, and this structure is favorable to simplifying circuit structure, and it is comparatively simple to walk the line, also is favorable to reducing the whole space that occupies of heating device 10.

In another preferred embodiment, as shown in fig. 1-4, the heating assembly 101 is wound around the support plate 102, and the inside of the heating assembly 101 is formed with a gap from at least one side of the support plate 102 to form an air flow path. Additionally, when the heating apparatus 10 is placed in a hand dryer, an airflow path may also be formed between the heating assembly and the housing of the hand dryer.

Here, the air flow path may be formed between only one side of the support plate 102 and the heating assembly, or between both sides of the support plate 102 and the heating assembly. Wherein, compare in the former, the latter is more favorable to realizing gaseous circulation, and then is favorable to guaranteeing the air-out effect of the hand dryer that contains this heating device 10.

In another preferred embodiment, the inner side of the heating assembly 101 is formed with a gap with both sides of the support plate 102 to form an air flow path.

In another preferred embodiment, the heating assembly 101 is wound outside the support plate 102 along the length direction of the support plate 102 such that the air flow path extending direction is parallel to the length direction of the support plate 102.

Wherein, adopt above-mentioned structure setting, the structure of heater block is comparatively simple, is convenient for also realize gaseous circulation, and then is favorable to guaranteeing the air-out effect that contains this heating device 10's hand dryer.

In another preferred embodiment, the heating component further comprises a mounting plate 103, the mounting plate 103 of an adjacent heating component is connected at a first end 1031 thereof, and the support plate 102 is disposed on the mounting plate 103 and at a second end 1032 of the mounting plate 103. Specifically, as shown in fig. 1 to 4, the mounting plates 103 of the respective heating members may be split into an integrated plate-shaped structure.

On one hand, the mounting plate 103 can support the heating assembly 101 and the support plate 102, which is beneficial to improve the overall strength of the heating device 10, and can also provide a mounting carrier for other accessories, such as the protection element 106 and the temperature sensor 105 described below; on the other hand, the mounting plates 103 of the adjacent heating components are connected, so that the heating components are connected into a whole, and the installation is convenient.

In another preferred embodiment, the heating means further comprise insulating elements 104, the outer cover of each heating assembly 101 being provided with an insulating element 104.

The heat insulation element 104 can prevent heat generated by the heating assembly 101 from being diffused to the outside, thereby preventing energy waste, improving heating effect, and reducing or even preventing damage to external structures.

It should be noted that the insulating element 104 may be made of any material suitable for insulating.

In another preferred embodiment, as shown in fig. 1-4, support plate 102 is mated with mounting plate 103 such that support plate 102 extends from one side of mounting plate 103 to the other side of mounting plate 103; the support plate 102 and the mounting plate 103 form a mounting frame with an X-shaped cross section, the mounting frame of the X-shaped cross section forms an airflow path consisting of four basically separated spaces, the heating assembly 101 may specifically select an electric heating wire, mounting grooves may be respectively arranged on the support plate 102 and the mounting plate 103 (as shown in fig. 4, the mounting groove on the support plate 102 is shown as a first mounting groove 1021, and the mounting groove on the mounting plate 103 is shown as a second mounting groove 1033) to wind the electric heating wire, and a half of the wound structure of the electric heating wire also has a gap and can form a part of the fluid path; the heating element 101 may also be a PTC heating element, an electric heating tube, or the like. The heating device may also comprise a plurality of support plates 102, and the cross-sectional shape of the support plate 102 and the mounting plate 103 constituting the mounting frame may be changed correspondingly.

The insulating element 104 is a sleeve structure, the insulating element 104 is sleeved on the second end of the mounting plate 103, and the heating assembly 101 and the support plate 102 are positioned inside the insulating element 104.

Wherein, backup pad 102 and mounting panel 103 peg graft mutually, and both connection mode is simple, and both connect the back and can provide more accommodation space and set up coupling assembling. In addition, the insulating element 104 is provided as a sleeve structure that facilitates connection to both the mounting plate 103 and external structures. Meanwhile, the heat insulation element 104 is arranged at one end of the mounting plate 103 where the heating assembly 101 is arranged, so that the weight of the heating device 10 is reduced, and consumables are reduced.

It should be noted that in alternative embodiments, the insulating element 104 may be provided in other configurations, and in addition, the insulating element 104 may be provided over the entire extent of the mounting plate 103.

In an alternative embodiment, as shown in FIGS. 2-3, the insulating element 204 may be provided as a unitary structure with the support plate 102 and the mounting plate 103.

In another preferred embodiment, a gap is formed between an end of the heating assembly 101 proximate to the inner wall of the insulating element 104 and the inner wall of the insulating element 104.

A gap is formed between the heating assembly 101 and the heat insulation element 104, so that the heating assembly 101 is prevented from being damaged due to friction between the heating assembly 101 and the heat insulation element 104, an airflow passage is increased, and airflow resistance is reduced.

In another preferred embodiment, the insulating element 104 is made of mica.

Mica has good heat-insulating property, insulating property and chemical stability, and is favorable for ensuring the overall stability and reliability of the heating device 10.

In another preferred embodiment, the heating means further comprises a protection device provided on the mounting board 103, the protection device comprising a temperature sensor 105, a control element and a protection element 106;

wherein the temperature sensor 105 is adapted to detect a temperature and to generate a temperature signal and to transmit the temperature signal to the control element when the detected temperature exceeds a threshold value, the control element being adapted to act on the protection element 106 to switch the heating assembly 101 from the active state to the inactive state.

Wherein, protection device can make heating element 101 switch to the non-activated state when detecting that the temperature is higher to can be in presetting the within range with temperature control, be favorable to guaranteeing the whole security including heating device 10's hand dryer, also be favorable to improving the life of hand dryer.

In another preferred embodiment, the protection element 106 is a temperature-dependent switch or a fuse.

The fuse wire is small in size and small in space requirement, and needs to be replaced after being fused. The temperature control switch can be used repeatedly, but has a larger size and a relatively larger space requirement compared with a fuse wire.

In another preferred embodiment, the mounting plate 103 is provided with a receiving groove 107, an avoiding groove 108 is provided at a position corresponding to the receiving groove 107 at the bottom of the supporting plate 102, at least a portion of the protecting element 106 is provided in the receiving groove 107, and the protecting element 106 is located in a space enclosed by the receiving groove 107 and the avoiding groove 108.

The avoidance groove 108 and the accommodating groove 107 are matched, so that the requirement for the thickness of the mounting plate 103 can be reduced, and the space utilization rate can be improved.

It should be noted that in other alternative embodiments, the protection element 106 may also be provided directly on the mounting plate 103.

As shown in fig. 2 and 3, the mounting plate 103 of one of the heating members is provided with a temperature sensor, and the mounting plate 103 of the other heating member is provided with a protective member 106 (a fuse is schematically shown) in a receiving groove 107.

As shown in fig. 5-7, the present invention also provides a hand dryer comprising a housing, at least two air outlet duct assemblies 40 and the heating device 10 described above. The air outlet pipeline assembly 40 is communicated with the shell, an air outlet (not marked in the figure) is formed in the air outlet pipeline assembly 40, and at least two air outlet pipeline assemblies 40 are arranged at intervals. The heating parts are arranged adjacent to the corresponding air outlet pipeline assemblies 40, the heating parts and the air outlets are at least partially staggered, and the interval areas of the at least two heating parts and the interval areas of the at least two air outlet pipeline assemblies 40 are at least partially overlapped. The airflow passage is communicated between the shell and the air outlet.

Two air outlet duct assemblies 40 are shown schematically in figure 5. It should be understood that in other alternative embodiments, three or more than three may be provided according to actual design requirements.

Wherein, the air current that derives from the inside of casing gets into air-out pipeline subassembly 40 and heating element 101 through the interval region of coincidence or partial coincidence, under the effect of airflow channel, reaches the air outlet, can reduce the resistance of gas flow in-process, and the setting of heating element 101 can not block the flow of air current basically, can not influence the air-out effect of hand dryer. As mentioned above, the heating device 10 can be applied to a hand dryer which has a small overall volume and requires multi-zone heating, and therefore, the hand dryer including the heating device 10 can realize multi-zone heating, and the hand dryer can be set as a hand dryer having a small overall volume.

In another preferred embodiment, as shown in fig. 5-7, the housing includes a main housing 20 and a turning housing 30, the turning housing 30 is connected to the top side wall of the main housing 20, and an air outlet opening (not shown) is formed at an end of the turning housing 30 away from the main housing 20; the at least two air outlet pipeline assemblies 40 are respectively communicated with the air outlet openings, the heating components and the air outlet openings are at least partially arranged in a staggered manner, and the airflow passages are communicated between the air outlets and the air outlet openings; the heating assembly 101 is located within the outlet duct assembly 40.

Wherein, the heater block staggers the setting with the air-out opening at least partially, that is to say that the heater block the effect less to the air current that comes from main casing body 20, perhaps can not block the air current that comes from main casing body 20 at all, is favorable to realizing the heating function on the basis of guaranteeing hand dryer air-out effect. In addition, the provision of the heating assembly 101 within the outlet duct assembly 40 rather than within the main housing 20 of the hand dryer facilitates a compact design of the hand dryer.

Figure 7 schematically illustrates the airflow flow path within the hand dryer. Specifically, in this embodiment, the bottom of the main housing is provided with an air inlet, and the internal air source 70 in the main housing 20 generates a flowing air flow, which enters the flow channel in the main housing through the air inlet, enters the flow channel of the turn housing 30, and reaches the air outlet through the air flow channel to be discharged. The internal air source 70 is mainly used to provide air flow, and may be a fan, an air pump, or other existing devices for generating air flow. The internal air supply 70 is secured within the main housing 20 and may be powered by an external power source or an internal power source. Wherein the dotted lines with arrows schematically show the ejection direction of the air flow.

In a further preferred embodiment, the heating element is arranged completely offset from the air outlet.

Wherein, heater block staggers completely with the air outlet, means that the heater block can not restrict the air-out completely to, be favorable to further guaranteeing the air-out effect of hand dryer.

In another preferred embodiment, the hand dryer further comprises a connector 50, the connector 50 is connected and communicated between the air outlet duct assembly 40 and the air outlet opening, and the heating component is located in the accommodating cavity inside the connector 50.

Wherein, connecting piece 50 bears the heater block, is convenient for realize heater block and air outlet, air-out open-ended setting of staggering, and in addition, connecting piece 50 also can play the additional strengthening to the heater block.

It should be noted that the heating device 10 is connected to the connector 50, and in fact, the heating device 10 can be fastened (preferably by a detachable connection) to the receiving cavity of the connector by any connection suitable for this purpose. Fig. 6 schematically illustrates one way of connection by means of a fastening plate 80. The mounting plate 103 is provided with a fastening plate 80, the fastening plate 80 is provided with a fastening hole 801, and the heating apparatus 10 can be connected to the connection member 50 by passing a fastening member through the fastening hole 801 and the connection hole of the connection member 50. In addition, the hand dryer further comprises a fixing plate 60, the fixing plate 60 is mainly used for realizing the structural combination of the connecting piece 50, as shown in fig. 6, two ends of the fixing plate 60 are supported between the inner walls of two sides of the connecting piece 50 along the radial direction of the connecting piece 50, a clamping groove 601 is arranged on the fixing plate 60, and the mounting plate 103 of the heating device 10 is clamped in the clamping groove 601, so that the fixing plate 60 can also improve the reliability of the connection between the heating device 10 and the connecting piece 50.

In another preferred embodiment, a gap is formed between the top of the heating member and the wall of the accommodating chamber.

By adopting the structure, on one hand, the friction between the heating part and the connecting piece can be reduced or avoided, and the heating part is protected; on the other hand, this clearance also is favorable to the circulation of air current, and then is favorable to guaranteeing the air-out effect, is convenient for control the inside temperature of hand dryer.

In the present invention, the heating device 10 includes at least two heating components arranged at intervals, so that heating of multiple zones can be realized, and the heating device can be applied to a structure (such as a hand dryer) which has a small overall volume and needs multi-zone heating. In addition, the existence of the airflow channel between the heating component 101 and the support plate 102 in the heating component facilitates the circulation of air, thereby being beneficial to reducing the flow resistance and reducing the influence on the air outlet effect of the hand dryer. In addition, in the utility model, the airflow from the inside of the shell enters the air outlet pipeline assembly 40 and the heating assembly 101 through the overlapped or partially overlapped interval area and reaches the air outlet under the action of the airflow channel, so that the resistance in the flowing process of the air can be reduced, the flow of the airflow cannot be basically blocked by the arrangement of the heating assembly 101, and the air outlet effect of the hand dryer cannot be influenced. In addition, the hand dryer incorporating the heating device 10 described above is capable of achieving heating of multiple zones, and the hand dryer may be provided as a hand dryer having a small overall volume.

Example 2

The present embodiment discloses a heating device, as shown in fig. 1-4, the heating device 10 includes a mounting plate 103, at least two support plates 102, and at least two heating elements. Wherein, the mounting plate 103 is provided with a connecting structure. At least two support plates 102 are spaced apart on the mounting plate 103. At least two heating assemblies are wound on the at least two support plates 102 in a one-to-one correspondence. Of which only two support plates 102 and two heating assemblies are schematically shown in fig. 1-4.

In this embodiment, the attachment structure on the mounting plate 102 facilitates attachment of the heating device to an external structure (such as the attachment member described above in embodiment 1) to facilitate securement of the heating device. At least two heating element set up in two at least backup pads that the interval set up to two at least heating element intervals set up, can realize the heating to a plurality of regions, can be applicable to in the less and structure (like hand dryer) that need multizone heating of whole volume.

It should be noted that all the structural features disclosed in embodiment 1 with respect to the heating apparatus 10 are applicable thereto.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.

Claims (19)

1. The heating device is characterized by comprising at least two heating parts which are arranged at intervals, wherein each heating part comprises a supporting plate and a heating assembly connected to the supporting plate;

the heating parts are positioned to form an air flow passage communicated with the interval area of at least two heating parts.

2. The heating device of claim 1, wherein: the heating components of at least two heating components are connected in series into a circuit.

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

4. A heating device as claimed in claim 3, wherein: gaps are formed between the inner side of the heating assembly and the two sides of the support plate to form the air flow passage.

5. A heating device as claimed in claim 3, wherein: the heating assembly is wound outside the support plate along the length direction of the support plate, so that the extending direction of the airflow passage is parallel to the length direction of the support plate.

6. The heating device of claim 1, wherein the heating element further comprises a mounting plate, a first end of the mounting plate being attached adjacent the heating element, and the support plate being disposed on the mounting plate at a second end of the mounting plate.

7. The heating device of claim 6, wherein: the heating member further comprises heat insulating elements, and the outer cover of each heating assembly is provided with the heat insulating elements.

8. The heating device of claim 7, wherein: the supporting plate and the mounting plate are spliced so that the supporting plate extends from one side of the mounting plate to the other side of the mounting plate;

the heat insulating element is of a sleeve structure, the heat insulating element is sleeved at the second end of the mounting plate, and the heating assembly and the supporting plate are located inside the heat insulating element.

9. The heating device of claim 8, wherein: a gap is formed between one end of the heating assembly close to the inner wall of the heat insulation element and the inner wall of the heat insulation element.

10. The heating device of claim 7, wherein: the insulating element is made of mica.

11. The heating device according to any one of claims 6 to 10, wherein: the heating part also comprises a protection device arranged on the mounting plate, and the protection device comprises a temperature sensor, a control element and a protection element;

wherein the temperature sensor is configured to detect a temperature and to generate a temperature signal and to transmit the temperature signal to the control element when the detected temperature exceeds a threshold value, the control element being configured to act on the protection element to switch the heating assembly from an active state to an inactive state.

12. The heating device of claim 11, wherein: the protection element is a temperature control switch or a fuse.

13. The heating device of claim 11, wherein: the protection element is arranged on the mounting plate;

or, the mounting plate is provided with a containing groove, the bottom of the supporting plate is provided with an avoiding groove at a position corresponding to the containing groove, at least one part of the protection element is arranged in the containing groove, and the protection element is positioned in a space surrounded by the containing groove and the avoiding groove.

14. The heating device of claim 1, wherein: the heating component also comprises an installation plate, and a connecting structure is arranged on the installation plate;

at least two support plates are arranged on the mounting plate at intervals;

the heating assembly is wound on the support plate.

15. A hand dryer, characterized in that it comprises:

a housing;

the air outlet pipeline assemblies are communicated with the shell, air outlets are formed in the air outlet pipeline assemblies, and the air outlet pipeline assemblies are arranged at intervals; and

the heating device of any one of claims 1-14, wherein the heating members are disposed adjacent to the corresponding outlet duct assemblies, and the heating members are at least partially offset from the outlet vents, and the spacing regions of at least two of the heating members at least partially coincide with the spacing regions of at least two of the outlet duct assemblies;

wherein the airflow passage is communicated between the housing and the air outlet.

16. A hand dryer as claimed in claim 15, wherein: the shell comprises a main shell and a steering shell, the steering shell is connected to the side wall of the top of the main shell, and an air outlet opening is formed in one end, far away from the main shell, of the steering shell; the at least two air outlet pipeline assemblies are respectively communicated with the air outlet opening, the heating component and the air outlet opening are at least partially arranged in a staggered mode, and the airflow passage is communicated between the air outlet and the air outlet opening; the heating assembly is positioned in the air outlet pipeline assembly.

17. A hand dryer as claimed in claim 15, wherein: the heating component and the air outlet are arranged in a staggered mode completely.

18. A hand dryer as claimed in claim 16, wherein: the hand dryer further comprises a connecting piece, the connecting piece is connected and communicated with the air outlet pipeline assembly and the air outlet opening, and the heating component is located in the accommodating cavity inside the connecting piece.

19. A hand dryer as claimed in claim 18, wherein: a gap is formed between the top of the heating component and the wall surface of the accommodating cavity.

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