CN104654429A - Electric heater - Google Patents

Electric heater Download PDF

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Publication number
CN104654429A
CN104654429A CN201510119328.XA CN201510119328A CN104654429A CN 104654429 A CN104654429 A CN 104654429A CN 201510119328 A CN201510119328 A CN 201510119328A CN 104654429 A CN104654429 A CN 104654429A
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CN
China
Prior art keywords
heat
generating units
electric heater
sidewall
housing
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Granted
Application number
CN201510119328.XA
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Chinese (zh)
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CN104654429B (en
Inventor
王祺志
刘凯
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Midea Group Co Ltd
GD Midea Environment Appliances Manufacturing Co Ltd
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Midea Group Co Ltd
GD Midea Environment Appliances Manufacturing Co Ltd
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Priority to CN201510119328.XA priority Critical patent/CN104654429B/en
Publication of CN104654429A publication Critical patent/CN104654429A/en
Application granted granted Critical
Publication of CN104654429B publication Critical patent/CN104654429B/en
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Abstract

The invention discloses an electric heater. The electric heater comprises a base, a shell and a heating unit, wherein the shell is arranged on the base; the bottom wall, the sidewall and the top wall of the shell are provided with through holes respectively; the heating unit is arranged inside the shell; the outer surface of the sidewall of the heating unit is provided with a far infrared radiation coating and has a preset distance from the inner surface of the sidewall of the shell; a hollow passage penetrating the heating unit along the vertical direction is arranged inside the heating unit; an upper opening of the hollow passage is opposite to the top wall of the shell; the lower opening of the hollow passage is opposite to the bottom wall of the shell. According to the electric heater of the embodiment of the invention, the outer surface of the sidewall of the heating unit is provided with the far infrared radiation coating so that some warm air can be transmitted outwards in a radiation manner by passing through the sidewall of the shell; some warm air is transmitted in a convection manner by passing through the top wall of the shell through the hollow passage; the radiation area is wide and uniform radiation is realized.

Description

Electric heater
Technical field
The present invention relates to household electrical appliance technical field, particularly relate to a kind of electric heater.
Background technology
Electric heater on current domestic and international market, mainly contains following several: 1, convection-type electric heater; 2, visible radiation formula electric heater, as Farinfrared electric heating, Sunny; 3, PTC warm-air drier; 4, electric heating installation using oil as medium.
Above 1st ~ 3 kinds of electric heaters all can only dispel the heat by single or double, cannot meet heating demand when many people sit around.Wherein the general top of convection-type electric heater is provided with gas outlet, below is air inlet, hot-air flows out from gas outlet, and cold air around enters supplementary from air inlet, iterative cycles like this, thus realize room air free convection heating, but the gas outlet area arranged due to top is generally less, therefore has the shortcoming that hotness is not strong.And when Farinfrared electric heating and Sunny work, namely after heater energising, give off heat with light or far infrared form, and diffuse to outside by reflector reflection, shortcoming has visible ray, forms light pollution, and be directed heating, heats area less.PTC warm-air drier utilizes blower fan blow air to flow through the heat radiation of PTC heating forced-air convection, mainly contains following shortcoming: have noise, have wind sense when work runs, easily dry, heat radiation scope is less.
The heating principle of electric heating installation using oil as medium is, in the metallic cavity of its body, fill conduction oil, heating immerses in conduction oil, when after heating heating power, conduction oil local temperature raises, then conduction oil flows in housing, is conducted to the inwall of housing by conduction oil, is conducted by heat distribute to surrounding by housing, the mode of heat trnasfer is mainly heat transfer, have following shortcoming: during heating conduction oil, preheating time is longer, the starting that heats up is comparatively slow, the bad possibility also having leakage of oil of processing technology.
The Chinese invention patent of Chinese patent CN200420094295.5 discloses a kind of two-sided or multi-face radiating electric warmer, comprise support, electrothermal tube, reflector, reflector is two or more, reflector is for arrange dorsad, electrothermal tube is arranged on support, the front portion of reflector, corresponding electrothermal tube is also two groups or more, forms the reflecting surface in two or more direction, in the hope of reaching two-sided or the effect of multiple directions heat radiation.Heat-generating pipe described in this electric heater is carbon fiber far infrared electro-thermal tube or quartzy B alloy wire electrothermal tube or halogen electrothermal tube, and these three kinds of electrothermal tubes all belong to the electrothermal tube of visible ray, can produce light pollution.Further, just tow sides have electrothermal tube, can only calculate two-side radiation strictly speaking, can not calculate multiaspect heat radiation.Electrothermal tube is tubular type, and by reflector reflecting heat, can cause heat-generating pipe facing portion position localized heat, and the effect that all the other regions are not hot, dispel the heat even not.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.
For this reason, one object of the present invention is that proposition one can multiaspect be dispelled the heat, heat dissipation region is wide, dispel the heat uniform electric heater.
According to the electric heater of the embodiment of the present invention, comprising: base; Housing, described housing to be located on described base and the diapire of described housing, sidewall and roof is equipped with through hole; Heat-generating units, described heat-generating units to be located in described housing and the spaced apart at least preset distance of inner surface of the outer surface of the sidewall of described heat-generating units and the sidewall of described housing, have the hollow channel of through along the vertical direction described heat-generating units in described heat-generating units, the upper shed of described hollow channel is relative with the roof of described housing and the under shed of described hollow channel and described housing diapire is relative.
According to the electric heater of the embodiment of the present invention, the spaced apart at least preset distance of inner surface of the outer surface of the sidewall of described heat-generating units and the sidewall of described housing, part warm braw can be made through the outside conduct radiation of sidewall of housing, there is in described heat-generating units the hollow channel of through along the vertical direction described heat-generating units, part warm braw can be made to carry out convect h by hollow channel through the roof of housing, can wide, the heat radiation of multiaspect heat radiation, heat dissipation region evenly.
In addition, electric heater according to the above embodiment of the present invention can also have following additional technical characteristic:
According to an example of the present invention, the outer surface of the sidewall of described heat-generating units has far infrared radiation coating.
According to an example of the present invention, described housing is the circumferential frame body being formed with multiple hole.
According to an example of the present invention, at least one that be projected as in rectangle, polygon, ellipse, annular of described circumferential frame body in the plane perpendicular to described above-below direction.
According to an example of the present invention, the heating element that described heat-generating units comprises by forming loop configuration is formed, and being formed with described hollow channel, wherein said heat-generating units is arranged in described circumferential frame body and with the inner side of described circumferential frame body distinguishes spaced apart at least described preset distance.
According to an example of the present invention, described heating element is formed as the tube structure with annular cross section.
According to an example of the present invention, described heating element formed by circumferentially juxtaposed multiple fever tablet.
According to an example of the present invention, the described outer surface of the described sidewall of described heat-generating units and the isolated described preset distance of the described inner surface of the described sidewall of described housing are identical along the circumference of described heat-generating units.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of electric heater according to an embodiment of the invention.
Fig. 2 is the decomposing schematic representation of electric heater according to an embodiment of the invention.
Fig. 3 is the decomposing schematic representation of the heat-generating units of electric heater according to an embodiment of the invention.
Fig. 4 is the sectional view of electric heater according to an embodiment of the invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Below with reference to the accompanying drawings the electric heater according to the embodiment of the present invention is described in detail.
As shown in Figures 1 to 4, according to the electric heater of the embodiment of the present invention, comprising: base 10, housing 20 and heat-generating units 30.
Specifically, housing 20 to be located on base 10 and the diapire of housing 20, sidewall and roof is equipped with through hole.
Heat-generating units 30 is located in housing 20.The spaced apart at least preset distance of inner surface of the outer surface of the sidewall of heat-generating units 30 and the sidewall of housing 20.There is in heat-generating units 30 the hollow channel (not shown) of vertically (direction that namely arrow as shown in Figure 1 is indicated up and down) through heat-generating units 30 in direction.The upper shed of described hollow channel is relative with the roof of housing 20 and the under shed of described hollow channel and housing 20 diapire is relative.
According to the electric heater of the embodiment of the present invention, the spaced apart at least preset distance of inner surface of the outer surface of the sidewall of described heat-generating units and the sidewall of described housing, part warm braw can be made through the outside conduct radiation of sidewall of housing, there is in described heat-generating units the hollow channel of through along the vertical direction described heat-generating units, part warm braw can be made to carry out convect h by hollow channel through the roof of housing, can wide, the heat radiation of multiaspect heat radiation, heat dissipation region evenly.
Advantageously, the outer surface of the sidewall of heat-generating units 30 has far infrared radiation coating (not shown), and this far infrared radiation coating is known to those skilled in the art, such as can from Japanese Shang company, Harbison company of the U.S., the cloud China sunrise paint company of China obtains.Thus, the outer surface of the sidewall of described heat-generating units has far infrared radiation coating, and described heat-generating units can be made operationally not produce visible ray
More specifically, according to the electric heater of the embodiment of the present invention, comprising: base 10, housing 20 and heat-generating units 30.Housing 20 to be located on base 10 and the diapire of housing 20, sidewall and roof is equipped with through hole.
According to an example of the present invention, housing 20 can for being formed with the circumferential frame body in multiple hole.Advantageously, described circumferential frame body is perpendicular at least one be projected as in rectangle, polygon, ellipse, annular in the plane of above-below direction.
Fig. 2 shows a specific embodiment of described circumferential frame body.
As shown in Figure 2, housing 20 comprise the base plate 201 with end through hole, the header board 202 with front through hole, have rear through hole rear plate 203, have left through hole left plate 204, there is the right plate 205 of right through hole and there is the top cover 206 of top through hole (mark).
According to one embodiment of present invention, base plate 201 is located on base 10.
Header board 202 times (namely indicated under arrow as shown in Figure 2 direction) edges are connected with (namely indicated before arrow as shown in Figure 2 direction) edge before base plate 201.
The lower edge of rear plate 203 is connected with rear (namely indicated after arrow as shown in Figure 2 direction) edge of base plate 201.
The lower edge of left plate 204 is connected with a left side (direction namely indicated by an arrow left side as shown in Figure 2) edge of base plate 201.The front of left plate 204 is along being connected with the left margin of header board 202.The back edge of left plate 204 is connected with the left margin of rear plate 203.
The lower edge of right plate 205 is connected with the right side (direction namely indicated by the arrow right as shown in Figure 2) edge of base plate 201.The front of right plate 205 is connected along with the edge, the right of header board 202.The back edge of right plate 205 and the right of rear plate 203 are along being connected.
Advantageously, left plate 204 is provided with left attacker 2041, and right plate 205 has been provided with attacker 2051, is convenient to user and carries the mobile electric heater according to the embodiment of the present invention.
The front lower edge of top cover 206 is connected with upper (namely indicated on arrow as shown in Figure 2 direction) edge of header board 202.The rear lower edge of top cover 206 is connected with the upper edge of rear plate 203.The left lower side of top cover 206 is along being connected with the upper edge of left plate 204.The edge, bottom right of top cover 206 is connected with the upper edge of right plate 205.
That is, housing 20 is configured to cuboid substantially.It is perpendicular to being projected as rectangle in the plane of above-below direction.
By foregoing description, it will be understood by those skilled in the art that housing 20 is can also for polygon, ellipse, annular etc. perpendicular to the projection in the plane of above-below direction.
According to an example of the present invention, the heating element that heat-generating units 30 comprises by forming loop configuration is formed, and is formed with described hollow channel (not shown).Wherein heat-generating units 30 is arranged in described circumferential frame body and with the inner side of described circumferential frame body and distinguishes spaced apart at least described preset distance.
Such as, heat-generating units 30 is located in housing 20.The spaced apart at least preset distance of inner surface of the sidewall of heat-generating units 30 and the sidewall of housing 20.There is in heat-generating units 30 the hollow channel (not shown) of vertically (direction that namely arrow as shown in Figure 1 is indicated up and down) through heat-generating units 30 in direction.The upper shed of described hollow channel is relative with the roof of housing 20 and the under shed of described hollow channel and housing 20 diapire is relative.Advantageously, the outer surface of the sidewall of heat-generating units 30 has far infrared radiation coating (not shown).
According to a specific embodiment of the present invention, described heating element is formed as the tube structure with annular cross section.Described heating element formed by circumferentially juxtaposed multiple fever tablet.
As shown in Figure 3, the left fever tablet 303 that heat-generating units 30 comprises front surface has the front fever tablet 301 of far infrared radiation coating (not shown), rear surface has far infrared radiation coating (not shown) rear fever tablet 302, left surface has far infrared radiation coating (not shown) and right surface have the right fever tablet 304 of far infrared radiation coating (not shown).
As shown in Figures 2 and 3, front fever tablet 301 is arranged at (namely indicated before and after arrow as shown in Figure 2 direction) interval in housing 20 and before and after header board 202.
Rear fever tablet 302 is arranged with rear plate 203 time interval in housing 20.
That is, outer surface and the isolated preset distance of the inner surface of the sidewall of housing 20 of the sidewall of heat-generating units 30 can be identical along the circumference of heat-generating units 30.
Left fever tablet 303 in housing 20 and left plate about 204 (namely indicated about arrow as shown in Figure 2 direction) interval arrange.The edge, front of left fever tablet 204 is connected with the left margin of front fever tablet 301 and the back edge of left fever tablet 303 is connected with the left margin of rear fever tablet 302.
Right fever tablet 304 in housing 20 with right plate 205 between left and right every layout.The edge, front of right fever tablet 304 is connected with the edge, the right of front fever tablet 301 and the back edge of right fever tablet 304 is connected with the edge, the right of rear fever tablet 302.
That is, front fever tablet 301, rear fever tablet 302, left fever tablet 303 and right fever tablet 304 surround four block form, form described hollow channel, can form stack effect and dispel the heat in four square frames, and heating rapidly.
Any one of front fever tablet 301, rear fever tablet 302, left fever tablet 303 and right fever tablet 304 can be all aluminium alloy fever tablet.
In addition, the electrical connection of front fever tablet 301, rear fever tablet 302, left fever tablet 303 and right fever tablet 304 can be in parallel.In other words, user can be combined rear heating to front fever tablet 301, rear fever tablet 302, left fever tablet 303 and right fever tablet 304.Thus, meet user warm oneself demand prerequisite under, can energy consumption be reduced.
When working according to the electric heater of the embodiment of the present invention, cold wind enters in housing by the end through hole of base plate 201, is heated into warm braw by front fever tablet 301, rear fever tablet 302, left fever tablet 303 and right fever tablet 304.Be in warm braw in described hollow channel upwards carries out above-below direction heat transfer through the top through hole of top cover 206.And the warm braw be between heat-generating units 30 and housing 20, a part carries out the heat transfer of above-below direction, and another part is had far infrared radiation coating and carried out the heat radiation of general horizontal direction by the through hole on the sidewall of housing 20 due to the outer surface of the sidewall of heat-generating units 30.Heat dissipation region is wide, heat radiation is even, can realize multiaspect heat radiation.
As shown in Figure 3, according to an example of the present invention, heat-generating units 30 also comprises fixed support 305 and lower fixed support 306.
The front of upper fixed support 305 is along being connected with the upper edge of front fever tablet 301.The back edge of upper fixed support 305 is connected with the upper edge of rear fever tablet 302.The left margin of upper fixed support 305 is connected with the upper edge of left fever tablet 303.The right of upper fixed support 305 is along being connected with the upper edge of right fever tablet 304.
The front of lower fixed support 306 is along being connected with the lower edge of front fever tablet 301.The back edge of lower fixed support 306 is connected with the lower edge of rear fever tablet 302.The left margin of lower fixed support 306 is connected with the lower edge of left fever tablet 303.The right of lower fixed support 306 is along being connected with the lower edge of right fever tablet 304.
Advantageously, the front of upper fixed support 305 is along having front upper installing hole 3051.The back edge of upper fixed support 305 has rear upper installing hole 3052.The left margin of upper fixed support 305 has upper left installing hole 3053.The right of upper fixed support 305 is along having upper right installing hole 3054.
The front of lower fixed support 306 is along having front lower installing hole 3061.The back edge of lower fixed support 306 has rear lower installing hole 3062.The left margin of lower fixed support 306 has lower-left installing hole 3063.The right of lower fixed support 306 is along having bottom right installing hole 3064.
The upper edge of front fever tablet 301 has with front upper installing hole 3051 adaptation before the upper stud 3011 and lower edge of front fever tablet 301 has the front lower stud 3012 with front lower installing hole 3061 adaptation.The upper edge of rear fever tablet 302 has with the rear upper stud 3021 of rear upper installing hole 3052 adaptation and the lower edge of rear fever tablet 302 has the rear lower stud 3022 with rear lower installing hole 3062 adaptation.The upper edge of left fever tablet 303 have with the upper left stud 3031 of upper left installing hole 3053 adaptation and the lower edge of left fever tablet 303 have the lower-left stud 3032 with lower-left installing hole 3063 adaptation.The upper edge of right fever tablet 304 has with the upper right stud 3041 of upper right installing hole 3054 adaptation and the lower edge of rear fever tablet 304 has the bottom right stud 3042 with bottom right installing hole 3064 adaptation.
That is, the stud of fever tablet is through the installing hole on fixed support, then fever tablet is connected with fixed support with nut, easy for installation.
According to an example of the present invention, the inner peripheral of upper fixed support 305 has the go forward backstop 3055 suitable with the upper end of front fever tablet 301, the upper rear backstop 3056 suitable with the upper end of rear fever tablet 302, the upper left backstop 3057 suitable with the upper end of left fever tablet 303, the upper right backstop 3058 suitable with the upper end of right fever tablet 304.The inner peripheral of lower fixed support 306 has the lower front backstop 3065 suitable with the lower end of front fever tablet 301, the lower rear backstop 3066 suitable with the lower end of rear fever tablet 302, the bottom left backstop 3067 suitable with the lower end of left fever tablet 303, the bottom right backstop 3068 suitable with the lower end of right fever tablet 304.Thus, accurate positioning, is convenient to install.
As shown in Figure 3, according to an example of the present invention, heat-generating units 30 also comprises upper connector 307 and lower connector 308.One end of upper connector 307 is connected with upper fixed support 305 and the other end of upper connector 307 is connected with housing 20.One end of lower connector 308 is connected with lower fixed support 306 and the other end of lower connector 308 is connected with housing 20.Advantageously, upper connector 307 and lower connector 308 are insulated connecting piece.Further, upper connector 307 and lower connector 308 are plastic fastening or ceramic connecting piece.Thus, once heat-generating units 30 leaks electricity, leak conductance can be prevented on housing 20, eliminate the potential safety hazard of electric heater electric leakage, ensure user security.
According to an example of the present invention, described electric heater also comprises post rod type dumping switch 40, and post rod type dumping switch 40 is located on base plate 201.Thus, once according to the electric heater of the embodiment of the present invention, post rod type dumping switch 40 can cut off circuit, and work on after preventing from toppling over generation potential safety hazard.
According to the electric heater of the embodiment of the present invention, described heat-generating units is located in described housing, the outer surface of the sidewall of described heat-generating units there is far infrared radiation coating and with the inner surface of the sidewall of described housing spaced a predetermined distance, there is in described heat-generating units the hollow channel of through along the vertical direction described heat-generating units, make to have thermal convection current and thermal-radiating heating effect concurrently according to the electric heater of the embodiment of the present invention, can multiaspect heat radiation, heat dissipation region wide, heat radiation is evenly.Further, the outer surface of the sidewall of described heat-generating units has far infrared radiation coating, and described heat-generating units can be made operationally not produce visible ray.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.

Claims (8)

1. an electric heater, is characterized in that, comprising:
Base;
Housing, described housing to be located on described base and the diapire of described housing, sidewall and roof is equipped with through hole;
Heat-generating units, described heat-generating units to be located in described housing and the spaced apart at least preset distance of inner surface of the outer surface of the sidewall of described heat-generating units and the sidewall of described housing, have the hollow channel of through along the vertical direction described heat-generating units in described heat-generating units, the upper shed of described hollow channel is relative with the roof of described housing and the under shed of described hollow channel and described housing diapire is relative.
2. electric heater according to claim 1, is characterized in that, the outer surface of the sidewall of described heat-generating units has far infrared radiation coating.
3. electric heater according to claim 2, is characterized in that, described housing is the circumferential frame body being formed with multiple hole.
4. electric heater according to claim 3, is characterized in that, at least one that be projected as in rectangle, polygon, ellipse, annular of described circumferential frame body in the plane perpendicular to described above-below direction.
5. electric heater according to claim 4, is characterized in that, the heating element that described heat-generating units comprises by forming loop configuration is formed, and is formed with described hollow channel, wherein
Described heat-generating units is arranged in described circumferential frame body and with the inner side of described circumferential frame body distinguishes spaced apart at least described preset distance.
6. electric heater according to claim 5, is characterized in that, described heating element is formed as the tube structure with annular cross section.
7. electric heater according to claim 5, is characterized in that, described heating element formed by circumferentially juxtaposed multiple fever tablet.
8. electric heater according to claim 1, is characterized in that, the described outer surface of the described sidewall of described heat-generating units and the isolated described preset distance of the described inner surface of the described sidewall of described housing are identical along the circumference of described heat-generating units.
CN201510119328.XA 2015-03-18 2015-03-18 Electric heater Active CN104654429B (en)

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CN112728626A (en) * 2021-01-05 2021-04-30 北京旭碳新材料科技有限公司 Heating system
WO2022037124A1 (en) * 2020-08-20 2022-02-24 珠海格力电器股份有限公司 Electric heater

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JPH01142341A (en) * 1987-11-28 1989-06-05 Rinnai Corp Radiation panel for heater device
CN2463726Y (en) * 2001-01-18 2001-12-05 周秀芳 Electric radiator with far-infrared
JP2004020047A (en) * 2002-06-17 2004-01-22 Matsushita Electric Ind Co Ltd Air conditioner
CN2739511Y (en) * 2004-10-26 2005-11-09 李家俊 Two-face or multi-face radiating electric warmer
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Publication number Priority date Publication date Assignee Title
WO2022037124A1 (en) * 2020-08-20 2022-02-24 珠海格力电器股份有限公司 Electric heater
CN112728626A (en) * 2021-01-05 2021-04-30 北京旭碳新材料科技有限公司 Heating system

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