CN220338552U - Electric heater - Google Patents

Abstract

The application relates to an electric heater, wherein a shell assembly is provided with a first air inlet and a mounting cavity which are communicated in sequence; the volute structure is positioned in the mounting cavity, a volute air channel is formed in the volute structure, a second air inlet and a first air outlet are formed in the volute air channel, and the volute air channel is communicated with the mounting cavity through the second air inlet; the power component is positioned in the volute air channel and is used for forming air flow in the volute air channel; the air outlet shell is in sealing connection with the volute structure, an air outlet channel is formed in the air outlet shell, the air outlet channel is communicated with the volute channel, and a second air outlet is formed in the air outlet channel; the heating element is arranged at the air inlet of the air outlet shell, is positioned in the air outlet air duct and is opposite to the first air outlet. Through the cooperation of casing subassembly, spiral case structure, heating element and air-out casing, effectively improve the intake in spiral case wind channel to and the direction that changes the air current through spiral case wind channel makes air current and heating element heat transfer efficiency higher, and noise abatement, promote the user and enjoy experience.

Description

Electric heater

Technical Field

The application relates to the technical field of electric heaters, in particular to an electric heater.

Background

The electric heater is a device for converting electric energy into heat energy to heat, and the current electric heater heats the inside of the machine body and then discharges heat through a through hole on the machine body, so that the space is heated, and the heating effect is achieved. But the wind power generated by the fan of the conventional electric heater in the market is sent out after irregular collision and friction in the shell, so that the wind speed is low, the air supply distance is short, and the heating effect is reduced.

Disclosure of Invention

Based on this, it is necessary to provide an electric heater to solve the problems of the conventional electric heater that the air speed is small, the air supply distance is short, and the heating effect is poor.

An electric heater, comprising: the shell assembly is internally provided with an installation cavity, and is provided with a first air inlet which is communicated with the installation cavity; the volute structure is arranged on the shell assembly, the volute structure is positioned in the installation cavity, a volute air channel is formed in the volute structure, a second air inlet and a first air outlet are formed in the volute air channel, and the volute air channel is communicated with the installation cavity through the second air inlet; the power assembly is positioned in the volute air duct and is used for forming air flow in the volute air duct; the air outlet shell is arranged on the shell assembly and is in sealing connection with the volute structure, an air outlet channel is formed in the air outlet shell and is communicated with the volute channel, and a second air outlet is formed in the air outlet channel; the heating element is arranged at the air inlet of the air outlet shell, is positioned in the air outlet air duct and is opposite to the first air outlet.

According to the electric heater disclosed by the application, the power component is used for obtaining negative pressure in the volute air channel, external air enters the installation cavity from the first air inlet of the housing component, then enters the volute air channel through the second air inlet on the volute structure and forms whirling and vortex, so that the wind power is improved, and the longer air supply distance and the faster air supply speed are achieved; the heating element is arranged in the air outlet channel and is opposite to the air outlet direction of the first air outlet of the volute structure, and air flow discharged from the first air outlet directly flows to the heating element and is subjected to heat transfer, and heated air flow is discharged through the second air outlet of the air outlet channel; through the cooperation of casing subassembly, spiral case structure, heating element and air-out casing, can effectively improve the intake in spiral case wind channel to and the direction that changes the air current through spiral case wind channel makes air current and heating element heat transfer efficiency higher, but also can the noise abatement, promotes the user and enjoys and experience.

In one embodiment, the volute structure comprises a drainage part, a circumference part and a volute tongue part which are sequentially connected, the drainage part and the volute tongue part are enclosed to form the first air outlet, the first air outlet is communicated with the air outlet air duct, and the caliber of the first air outlet is gradually increased along the direction that the volute tongue part is far away from the drainage part.

The electric heater in the embodiment further limits that the drainage part and the volute tongue are enclosed to form the first air outlet, and the caliber of the first air outlet is gradually increased along the direction that the volute tongue is far away from the drainage part, so that the air outlet range of the first air outlet is increased, the phenomenon that the air flow contacted by the heating element in unit time is too small, and heat generated by the heating element does not participate in heat transfer in time to cause heat waste is avoided.

In one embodiment, the air inlet of the air outlet shell is provided with a plurality of limiting pieces, the plurality of limiting pieces are distributed on the air outlet shell at intervals, the limiting pieces are provided with grooves, the grooves are matched with the heating element, two adjacent limiting pieces, the heating element and the air outlet shell form an air inlet gap, and the air inlet gap is communicated with the air outlet duct.

The electric heater in the embodiment further defines that the air outlet shell is provided with a plurality of limiting pieces, grooves matched with the heating elements are formed in the limiting pieces, the heating elements are overhead placed at the air inlet of the air outlet shell through the limiting pieces, and air flow exhausted through the volute air channel and the heating elements are subjected to heat transfer and then enter the air outlet air channel through the air inlet gap.

In one embodiment, the limiting member is integrally formed with the air outlet housing.

In one embodiment, the heating element is a block-shaped PTC heater; the heating element adopts the block PTC heating element, so that the contact area between the air flow discharged through the first air outlet of the volute structure and the heating element can be increased, and the heat exchange efficiency is improved.

In one embodiment, the housing assembly includes a front cover and a rear housing, the front cover and the rear housing enclose to form the installation cavity, the first air inlets are provided on two sides of the rear housing, the front cover is provided with an opening, the opening is communicated with the second air outlet, the volute structure is arranged on the rear housing, and the second air inlets are provided on one side of the volute structure facing the front cover.

The electric heater in the above embodiment further defines that the shell assembly is composed of a front cover and a rear shell, wherein the two sides of the rear shell are provided with first air inlets, one side of the volute structure, which faces the front cover, is provided with second air inlets, external air enters the installation cavity through the first air inlets at the two sides of the rear shell, then enters the volute air channel through the second air inlets, and the air inlet quantity is further improved.

In one embodiment, the number of the first air inlets is plural, and the plural first air inlets are distributed at intervals on two sides of the rear shell

In one embodiment, the air outlet duct is J-shaped.

The electric heater in the above embodiment further defines that the whole air outlet duct is J-shaped, through the above structure, the air flow discharged from the spiral case duct and the heating element enter the air outlet duct after heat transfer, and the air flow is smoothly discharged along the arc of the air outlet duct due to the J-shaped air outlet duct, so that noise or heat loss caused by collision of the air flow and the air outlet duct is avoided.

In one embodiment, the second air outlet is horn-shaped.

The electric heater in the above embodiment further defines that the second air outlet of the air outlet duct is horn-shaped, and through the above structure, the air outlet quantity of the second air outlet can be improved.

In one embodiment, an air outlet grille is arranged in the air outlet duct, and the air outlet grille is detachably arranged on the air outlet shell.

The electric heater in the above embodiment further defines that the air outlet grille is arranged in the air outlet duct, and as the second air outlet of the air outlet duct is positioned at the bottom of the electric heater, small animals easily enter the volute duct or the installation cavity through the air outlet duct, damage is caused to internal equipment, and objects with a certain volume can be effectively prevented from entering the volute duct through the air outlet grille by arranging the air outlet grille.

In one embodiment, the air outlet grille is detachably connected with the air outlet shell.

In one embodiment, the air outlet device further comprises a filter screen assembly arranged on the air outlet shell, and the filter screen assembly is located between the heating element and the air outlet grating.

The electric heater in the above embodiment is further defined that the electric heater further comprises a filter screen assembly, wherein the filter screen assembly is arranged between the heating element and the air outlet grating, so that heated air flow can be effectively purified after being filtered by the filter screen assembly, and then is discharged through the second air outlet.

In one embodiment, the end part of the volute structure, which is close to the second air outlet, is bent to form two clamping grooves, the two clamping grooves are oppositely arranged, the air outlet shell is folded outwards, which is close to the air inlet, to form a first flanging and/or a second flanging, the number of the first flanging is consistent with that of the clamping grooves, the first flanging is matched with the clamping grooves, and the second flanging is abutted to the volute structure.

The electric heater in the above embodiment further defines that the end part of the volute structure close to the second air outlet is bent to form two clamping grooves, the air outlet shell is bent outwards close to the air inlet to form two first flanges and one second flange, wherein the first flanges are matched with the clamping grooves, the air outlet shell is connected with the volute structure through the first flanges and the clamping grooves in a clamping mode, and the second flanges are abutted with the volute structure to shield a gap at the connection position of the air outlet shell and the volute structure.

In one embodiment, the electric heater further comprises a control device, the control device is respectively and electrically connected with the power assembly and the heating element, the control device, the volute structure and the air outlet shell are sequentially distributed in the direction from the top to the bottom of the shell assembly, and the control device is used for receiving a user instruction to drive the power assembly and the heating element to work.

The electric heater in the embodiment further comprises a control device, wherein the control device can set an instruction to drive the heating element and the power assembly to work according to the instruction of a user; meanwhile, the control device, the volute structure and the air outlet shell are sequentially distributed along the direction from the top to the bottom of the shell assembly, so that the situation that the control device is too close to the heating area of the heating element or the second air outlet is too close to the control device to cause that components of the control device are affected by high temperature to accelerate equipment aging can be avoided.

In one embodiment, the electric heater further comprises a human body induction module, the human body induction module is arranged on the shell assembly, the human body induction module is electrically connected with the control device, and the human body induction module is used for human body induction.

The electric heater in the above embodiment is further limited to be provided with a human body induction module, and human body induction can be performed in real time by arranging the human body induction module on the front cover, and when the human body induction module induces that no user exists in the current use area of the electric heater, a feedback signal is output to the control device, so that the heating element and the power assembly are regulated to stop working or reduce power operation.

In one embodiment, the power assembly comprises an impeller assembly and a fan, the fan is arranged on the volute structure, the impeller assembly is coaxially connected with the fan, and the fan is electrically connected with the control device.

Drawings

Fig. 1 is a first directional perspective view of an electric heater in one embodiment;

FIG. 2 is an exploded view of an electric heater in one embodiment;

fig. 3 is a first directional cross-sectional view of an electric heater in one embodiment;

fig. 4 is a second directional cross-sectional view of an electric heater according to an embodiment;

FIG. 5 is a cross-sectional view of a volute structure in one embodiment;

FIG. 6 is a cross-sectional view of an air-out housing in one embodiment.

Reference numerals:

10 shell components, 11 front covers, 12 rear shells, 101 first air inlets and 102 mounting cavities;

the spiral case structure 20, the drainage part 21, the circumference part 22, the 23 spiral case tongue part 201, the spiral case air duct 202, the second air inlet 203, the first air outlet 203 and the clamping groove 204;

30 air outlet shells, 31 limiting pieces, 32 first flanging, 33 second flanging, 34 air outlet grids, 301 air outlet channels, 302 second air outlets, 303 grooves and 304 air inlet gaps;

40 power components, 41 impellers and 42 fans;

a heating element 50;

60 control means;

70 human body sensing module.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein.

As shown in fig. 1 to 5, the present embodiment provides an electric heater, including: the shell assembly 10, wherein a mounting cavity 102 is formed in the shell assembly 10, the shell assembly 10 is provided with a first air inlet 101, and the first air inlet 101 is communicated with the mounting cavity 102; the volute structure 20 is arranged on the housing assembly 10, the volute structure 20 is positioned in the mounting cavity 102, a volute air channel 201 is formed in the volute structure 20, a second air inlet 202 and a first air outlet 203 are formed in the volute air channel 201, and the volute air channel 201 is communicated with the mounting cavity 102 through the second air inlet 202; the power assembly 40, the power assembly 40 is located in the volute air duct 201, and the power assembly 40 is used for forming air flow in the volute air duct 201; the air outlet shell 30 is arranged on the shell assembly 10, the air outlet shell 30 is in sealing connection with the volute structure 20, the air outlet air duct 301 is communicated with the volute air duct 201, and the air outlet air duct 301 is provided with a second air outlet 302; the heating element 50, the heating element 50 is disposed at the air inlet of the air outlet housing 30, and the heating element 50 is disposed in the air outlet duct 301 and opposite to the first air outlet 203.

According to the electric heater disclosed by the application, negative pressure is formed in the volute air channel 201 by power supply of the power assembly 40, external air enters the installation cavity 102 from the first air inlet 101 of the shell assembly 10, then enters the volute air channel 201 through the second air inlet 202 on the volute structure 20 and forms whirl and vortex, so that wind power is improved, and a longer air supply distance and a faster air supply speed are achieved; the heating element 50 is arranged in the air outlet channel 301 and is opposite to the air outlet direction of the first air outlet 203 of the volute structure 20, and the air flow discharged from the first air outlet 203 directly flows to the heating element 50 and is subjected to heat transfer, and the heated air flow is discharged through the second air outlet 302 of the air outlet channel 301; through the cooperation of casing subassembly 10, spiral case structure 20, heating element 50 and air-out casing 30, can effectively improve the intake of spiral case wind channel 201 to and the direction that changes the air current through spiral case wind channel 201 makes air current and heating element 50 heat transfer efficiency higher, but also can noise abatement, promotes the user and enjoys the experience.

As shown in fig. 5, this embodiment further defines, in addition to the features of the above-described embodiment: the volute structure 20 comprises a drainage part 21, a circumference part 22 and a volute tongue part 23 which are sequentially connected, wherein the drainage part 21 and the volute tongue part 23 are enclosed to form a first air outlet 203, and the caliber of the first air outlet 203 is gradually increased along the direction that the volute tongue part 23 is far away from the drainage part 21.

The electric heater further defines that the drainage portion 21 and the volute tongue portion 23 are enclosed to form the first air outlet 203, and the caliber of the first air outlet 203 is gradually increased along the direction that the volute tongue portion 23 is far away from the drainage portion 21, so that the air outlet range of the first air outlet 203 is increased, and the phenomenon that the air flow contacted by the heating element 50 in unit time is too small, and heat generated by the heating element 50 does not participate in heat transfer in time to cause heat waste is avoided.

As shown in fig. 3 to 6, this embodiment further defines, in addition to the features of the above-described embodiment: the air inlet department of air-out casing 30 has offered locating part 31, and the quantity of locating part 31 is a plurality of, and a plurality of locating parts 31 interval distribution is on air-out casing 30, and locating part 31 has offered recess 303, recess 303 and heating element 50 looks adaptation, and adjacent two locating parts 31 and heating element 50, air-out casing 30 form air inlet gap 304, and air inlet gap 304 communicates with air-out wind channel 301.

The electric heater further defines that the air outlet housing 30 is provided with a plurality of limiting members 31, grooves 303 matched with the heating elements 50 are formed in the limiting members 31, the heating elements 50 are overhead placed at the air inlet of the air outlet housing 30 through the plurality of limiting members 31, and air flow discharged through the volute air duct 201 and the heating elements 50 are subjected to heat transfer and then enter the air outlet air duct 301 through the air inlet gap 304.

Preferably, the limiting member 31 is integrally formed with the air outlet housing 30.

Preferably, the heating element 50 is a block-shaped PTC heater; by adopting the block-shaped PTC heater for the heating element 50, the contact area between the air flow discharged through the first air outlet 203 of the volute structure 20 and the heating element 50 can be increased, and the heat exchange efficiency can be improved.

As shown in fig. 1 to 2, this embodiment further defines, in addition to the features of the above-described embodiment: the housing assembly 10 comprises a front cover 11 and a rear shell 12, wherein the front cover 11 and the rear shell 12 enclose to form a mounting cavity 102, the two sides of the rear shell 12 are provided with a first air inlet 101, the front cover 11 is provided with an opening, the opening is communicated with a second air outlet 302, the volute structure 20 is arranged on the rear shell 12, and the side of the volute structure 20, facing the front cover 11, is provided with a second air inlet 202.

The electric heater further defines that the shell assembly 10 is composed of a front cover 11 and a rear shell 12, the two sides of the rear shell 12 are provided with first air inlets 101, one side of the volute structure 20, which faces the front cover 11, is provided with second air inlets 202, and through the structure, external air enters the installation cavity 102 through the first air inlets 101 at the two sides of the rear shell 12 and then enters the volute air channel 201 through the second air inlets 202, so that the air intake is improved.

As shown in fig. 6, this embodiment further defines, in addition to the features of the above-described embodiment: the number of the first air inlets 101 is multiple, and the first air inlets 101 are distributed at two sides of the rear shell 12 at intervals.

As shown in fig. 3 and 6, this embodiment further defines, in addition to the features of the above-described embodiment: the air outlet duct 301 is J-shaped.

The electric heater further defines that the air outlet duct 301 is integrally J-shaped, and through the structure, air flow discharged from the volute air duct 201 and the heating element 50 are subjected to heat transfer and then enter the air outlet duct 301, and the air flow is smoothly discharged along the arc shape of the air outlet duct 301 due to the fact that the air outlet duct 301 is J-shaped, so that noise or heat loss caused by collision between the air flow and the air outlet duct 301 is avoided.

As shown in fig. 3 and 6, this embodiment further defines, in addition to the features of the above-described embodiment: the second air outlet 302 has a horn shape.

The above embodiment further defines that the second air outlet 302 has a horn shape, and by adopting the above structure, the air output of the second air outlet 302 can be improved.

As shown in fig. 1, this embodiment further defines, in addition to the features of the above-described embodiment: an air outlet grating 34 is arranged in the air outlet duct 301, and the air outlet grating 34 is detachably arranged on the air outlet shell 30.

The embodiment further defines that the air outlet grille 34 is disposed in the air outlet duct 301, and since the second air outlet 302 is located at the bottom of the electric heater, small animals easily enter the volute air duct 201 or the installation cavity 102 through the air outlet duct 301, damage to internal devices is caused, and objects with a certain volume can be effectively prevented from entering the volute air duct 201 through the air outlet grille 34 by disposing the air outlet grille 34.

Preferably, the air outlet grille 34 is detachably connected to the air outlet housing 30.

As shown in fig. 4 and 6, this embodiment further defines, in addition to the features of the above-described embodiment: the electric heater also includes a screen assembly disposed on the air outlet housing 30 between the heating element 50 and the air outlet grill 34.

The above-described embodiments further define that the electric heater further includes a filter screen assembly disposed between the heating element 50 and the outlet grill 34 such that the heated air flow is filtered through the filter screen assembly to effectively clean the air before being exhausted through the second air outlet 302.

As shown in fig. 5 to 6, this embodiment further defines, in addition to the features of the above-described embodiment: the end of the volute structure 20, which is close to the second air outlet 302, is bent to form two clamping grooves 204, the two clamping grooves 204 are oppositely arranged, the air outlet shell 30, which is close to the air inlet, is outwards folded to form a first flanging 32 and/or a second flanging 33, the number of the first flanging 32 is consistent with that of the clamping grooves 204, the first flanging 32 is matched with the clamping grooves 204, and the second flanging 33 is abutted to the volute structure 20.

The above embodiment further defines that the end of the volute structure 20 near the second air outlet 302 is bent to form two clamping grooves 204, the air outlet housing 30 near the air inlet is turned outwards to form two first flanges 32 and one second flange 33, wherein the first flanges 32 are matched with the clamping grooves 204, the air outlet housing 30 is connected with the volute structure 20 through the clamping of the first flanges 32 and the clamping grooves 204, and the second flanges 33 are abutted with the volute structure 20 to shield the gap at the connection position of the air outlet housing 30 and the volute structure 20.

As shown in fig. 3 to 4, this embodiment further defines, in addition to the features of the above-described embodiment: the electric heater further comprises a control device 60, the control device 60 is electrically connected with the power assembly 40 and the heating element 50 respectively, the control device 60, the volute structure 20 and the air outlet casing 30 are sequentially distributed from the top to the bottom of the casing assembly 10, and the control device 60 is used for receiving a user instruction to drive the power assembly 40 and the heating element 50 to work.

The above embodiment further defines that the electric heater further comprises a control device 60, and the control device 60 can set the instruction to drive the heating element 50 and the power assembly 40 to work according to the instruction of the user; meanwhile, the control device 60, the volute structure 20 and the air outlet housing 30 are sequentially distributed along the top-to-bottom direction of the housing assembly 10, so that the situation that the control device 60 is too close to the heating area of the heating element 50 or the second air outlet 302 is too close to the control device 60 to cause that components of the control device 60 are affected by high temperature to accelerate equipment aging can be avoided.

As shown in fig. 1 to 3, this embodiment further defines, in addition to the features of the above-described embodiment: the electric heater further comprises a human body induction module 70, the human body induction module 70 is arranged on the shell assembly 10, the human body induction module 70 is electrically connected with the control device 60, and the human body induction module 70 is used for human body induction.

The above embodiment further defines that the electric heater further includes a human body sensing module 70, and the human body sensing module 70 may be disposed on the front cover 11, so that human body sensing can be performed in real time, and when the human body sensing module 70 senses that no user exists in the current use area of the electric heater, a feedback signal is output to the control device 60, so as to adjust the heating element 50 and the power assembly 40 to stop working or reduce power operation.

Alternatively, the power assembly 40 includes an impeller 41 assembly and a blower 42, the blower 42 being disposed on the volute structure 20, the impeller 41 assembly being coaxially connected to the blower 42, the blower 42 being electrically connected to the control device 60.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. An electric heater, comprising:

the device comprises a shell assembly (10), wherein an installation cavity (102) is formed in the shell assembly (10), a first air inlet (101) is formed in the shell assembly (10), and the first air inlet (101) is communicated with the installation cavity (102);

the spiral case structure (20), spiral case structure (20) is arranged on the casing assembly (10), the spiral case structure (20) is located in the installation cavity (102), a spiral case air channel (201) is formed in the spiral case structure (20), a second air inlet (202) and a first air outlet (203) are formed in the spiral case air channel (201), and the spiral case air channel (201) is communicated with the installation cavity (102) through the second air inlet (202);

the air outlet shell (30), the air outlet shell (30) is arranged on the shell assembly (10), the air outlet shell (30) is in sealing connection with the volute structure (20), an air outlet air channel (301) is formed in the air outlet shell (30), the air outlet air channel (301) is communicated with the volute air channel (201), and the air outlet air channel (301) is provided with a second air outlet (302);

a power assembly (40), the power assembly (40) being located within the volute air duct (201), the power assembly (40) being configured to form an air flow within the volute air duct (201);

the heating element (50) is arranged at the air inlet position of the air outlet shell (30), and at least part of the heating element (50) is positioned in the air outlet air duct (301) and is opposite to the first air outlet (203).

2. The electric heater according to claim 1, characterized in that the volute structure (20) comprises a drainage part (21), a circumference part (22) and a volute tongue part (23) which are sequentially connected, the drainage part (21) and the volute tongue part (23) enclose to form the first air outlet (203), and the caliber of the first air outlet (203) gradually increases along the direction of the volute tongue part (23) away from the drainage part (21).

3. The electric heater according to claim 1, wherein air inlet positions of the air outlet shell (30) are provided with a plurality of limiting pieces (31), the plurality of limiting pieces (31) are distributed on the air outlet shell (30) at intervals, the limiting pieces (31) are provided with grooves (303), the grooves (303) are matched with the heating element (50), two adjacent limiting pieces (31) and the heating element (50) form an air inlet gap (304), and the air inlet gap (304) is communicated with the air outlet duct (301).

4. The electric heater according to claim 1, characterized in that the housing assembly (10) comprises a front cover (11) and a rear shell (12), the front cover (11) and the rear shell (12) enclose to form the installation cavity (102), the first air inlets (101) are formed in two sides of the rear shell (12), the front cover (11) is provided with openings, the openings are communicated with the second air outlets (302), the volute structure (20) is arranged on the rear shell (12), and the second air inlets (202) are formed in one side, facing the front cover (11), of the volute structure (20).

5. The electric heater according to claim 1, characterized in that the air outlet duct (301) is J-shaped; and/or

The second air outlet is in a horn shape.

6. The electric heater according to claim 1, characterized in that an air outlet grille (34) is arranged in the air outlet duct (301), and the air outlet grille (34) is detachably arranged on the air outlet shell (30).

7. The electric heater of claim 6, further comprising a screen assembly disposed on the air outlet housing (30), the screen assembly being located between the heating element (50) and the air outlet grill (34), the screen assembly being for purifying air.

8. The electric heater according to claim 1, wherein the end portion of the volute structure (20) close to the second air outlet (302) is bent to form two clamping grooves (204), the two clamping grooves (204) are oppositely arranged, the air outlet shell (30) is folded outwards close to the air inlet to form first flanges (32) and/or second flanges (33), the number of the first flanges (32) is consistent with that of the clamping grooves (204), the first flanges (32) are matched with the clamping grooves (204), and the second flanges (33) are abutted against the volute structure (20).

9. The electric heater according to claim 1, further comprising a control device (60), wherein the control device (60) is electrically connected with the power assembly (40) and the heating element (50) respectively, the control device (60), the volute structure (20) and the air outlet casing (30) are sequentially distributed from top to bottom of the casing assembly (10), and the control device (60) is used for receiving a user command to drive the power assembly (40) and the heating element (50) to work.

10. The electric heater according to claim 9, further comprising a body sensing module (70), the body sensing module (70) being provided on the housing assembly (10), the body sensing module (70) being electrically connected to the control device (60), the body sensing module (70) being for body sensing.