CN107339738B - Wall-mounted electric heater - Google Patents
Wall-mounted electric heater Download PDFInfo
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- CN107339738B CN107339738B CN201710050106.6A CN201710050106A CN107339738B CN 107339738 B CN107339738 B CN 107339738B CN 201710050106 A CN201710050106 A CN 201710050106A CN 107339738 B CN107339738 B CN 107339738B
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- heat
- wall
- front panel
- electric heater
- conversion plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
- F24D13/02—Electric heating systems solely using resistance heating, e.g. underfloor heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/06—Casings, cover lids or ornamental panels, for radiators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1096—Arrangement or mounting of control or safety devices for electric heating systems
Abstract
The invention discloses a wall-mounted electric heater, which comprises an electric heating conversion plate, a front panel and a back panel, wherein the electric heating conversion plate is positioned between the front panel and the back panel; a heat radiation enhancing coating is provided on a first surface of the electrothermal conversion plate opposite to the front panel, and correspondingly, a heat radiation absorbing coating is provided on a first surface of the front panel opposite to the electrothermal conversion plate. The invention can improve the heat radiation conduction capability of the wall-mounted electric heater and the ratio of the heat radiation conduction capability to the total heat dissipation power, and can realize higher heating power per unit area.
Description
Technical Field
The invention relates to a wall-mounted electric heater.
Background
In most areas of China, indoor heating in winter is a practical problem, particularly in middle and south areas without central heating, and in order to improve living environment, residents need to use household self-service heating devices. Common heating modes comprise a self-contained gas boiler, an electric oil heater, a single-family ground source heat pump, an air conditioner and the like. The self-contained gas boiler and the single-family ground source heat pump relate to large projects, are inconvenient and have higher one-time investment cost. At present, an air conditioner and an electric oil heater are main modes of self-service heating, wherein the electric oil heater is higher in use ratio. The electric oil heater has the advantages of convenient movement and lower cost; the disadvantage is that the heating response is slow, the heat conduction oil inside needs to be heated to a higher temperature to obtain the required surface temperature, and the danger of scalding caused by the leakage of the high-temperature heat conduction oil inside also exists.
Chinese patent CN201320660203 discloses a carbon fiber superconducting electric heating wall picture, the copper plate picture is as the radiator, the copper plate picture is tightly attached to the carbon fiber heat conducting plate, in operation, to carbon fiber heat conducting plate power-on heating, the heat goes out through copper picture board radiation heat, this carbon fiber superconducting electric heating wall picture has still designed hollow frame, is filled with superconducting liquid in order to promote the radiating effect. Compared with an electric oil heater, the electric oil heater has the advantages that the temperature of the internal heat conducting liquid is slightly low, the safety is better, the structure is more complex, and the cost is not low.
In addition, the carbon crystal electric heating picture on the market is mostly wall-mounted at present, the appearance of the picture is similar to a wall picture, and the attached figure 1 shows a typical carbon crystal electric heating picture in a schematic structure.
As shown in figure 1, the carbon crystal electric heating picture comprises a front heat conducting plate 11, an electric heating plate 12, a rear heat conducting plate 13, a heat insulating plate 15 and a rear cover plate 16 along the thickness direction, and the parts are fixed together by a frame 14. The structure of the electric heating plate 12 is a multi-layer composite structure, and most commonly, a layer of electric heating film containing carbon crystal particles is clamped between two layers of epoxy glass fiber thin plates. The electrothermal film is manufactured by the following method: firstly, conducting paste containing carbon crystal particles is subjected to screen printing and high-temperature baking to form a planar conducting film with a certain resistance characteristic, and then conducting silver paste with high conductivity is adopted on the planar conducting film to form an interdigital electrode lead through the screen printing and high-temperature baking (or a copper foil strip is adopted to prepare the electrode lead). When the carbon crystal resistance film is in work, a power supply is connected into the interdigital electrode through the lead, current is formed in the carbon crystal resistance film, and heat is generated.
After the power is switched on, the heat generated by the carbon crystal electric heating film is conducted to the front surface and the rear surface of the electric heating plate 12 from inside to outside: preceding heat-conducting plate 11 and back heat-conducting plate 13, when the whole certain temperature that reaches of electric hot plate 12, the infrared radiation of leading heat-conducting plate 11 of perpendicular to is produced to outside to form the heat convection on the surface along back heat-conducting plate 13, thereby dissipate the heat to indoor, realize the promotion to indoor ambient temperature. The heat insulation plate 15 can be tightly attached to the rear heat conduction plate 13, a certain gap can also be reserved, and the heat insulation plate 15 is mainly used for reducing the conduction of heat to a wall.
The epoxy glass fiber sheet is formed by pressing epoxy resin and glass fiber, belongs to a non-metallic material, and has poor heat transfer and heat dissipation capabilities. In addition, because the electric heating plate 12 is tightly attached to the front heat-conducting plate 11, and the front heat-conducting plate 11 directly faces outwards, the carbon crystal electric heating picture is easy to touch by a user when being hung on a wall for use, and in order to prevent the user from touching and scalding, the surface temperature of the electric heating plate 12 of the electric heating picture must be controlled to be below 80 ℃ in a design mode. The lower radiation temperature and the poorer heat conduction capability result in lower heating power per unit area of the carbon crystal electric heating picture. To obtain satisfactory heating effect, correspond certain indoor area, the brilliant electric heating of carbon that the assembly area is bigger is drawn, occupies more wall on the one hand, also leads to use cost higher simultaneously.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a wall-mounted electric heater which can ensure that a user is not easily scalded while improving the electric-heat conversion power per unit area.
A wall-mounted electric heater comprises an electric heating conversion plate, a front panel and a back panel, wherein the electric heating conversion plate is positioned between the front panel and the back panel, a first heat convection channel is arranged between the front panel and the electric heating conversion plate, a second heat convection channel is arranged between the electric heating conversion plate and the back panel, air flow inlets of the first heat convection channel and the second heat convection channel are positioned below the wall-mounted electric heater, and air flow outlets of the first heat convection channel and the second heat convection channel are positioned above the wall-mounted electric heater; a heat radiation enhancing coating is provided on a first surface of the electrothermal conversion plate opposite to the front panel, and correspondingly, a heat radiation absorbing coating is provided on a first surface of the front panel opposite to the electrothermal conversion plate.
In one embodiment, the electrothermal conversion plate includes a heat-dissipating substrate, an insulating film, and a plurality of strip-shaped resistive films for generating heat, the insulating film and the resistive films being sequentially disposed on the heat-dissipating substrate, the resistive films being located on a side close to the front panel.
In one embodiment, the plurality of strip-shaped resistive films are distributed on the electrothermal conversion plate at intervals, and the intervals gradually increase from bottom to top along the height direction of the wall-mounted electric heater.
In one embodiment, the thermal radiation absorption coating disposed on the front panel locally covers the first surface of the front panel opposite to the electrothermal conversion plate in a distributed manner, and the spaced blank areas without the thermal radiation absorption coating are gradually increased from bottom to top along the height direction of the wall-mounted electric heater.
In one embodiment, the thermal radiation enhancement coating disposed on the electrothermal conversion plate locally covers a first surface of the electrothermal conversion plate opposite to the front panel in a distributed manner, and the spaced blank areas without the thermal radiation enhancement coating are gradually increased from bottom to top along the height direction of the wall-mounted electric heater.
In one embodiment, the front panel is a metal plate.
In one embodiment, the heat exchanger further comprises four peripheral frames, namely an upper frame, a lower frame, a left frame and a right frame, wherein the front panel, the electric heating conversion plate and the back panel are positioned through clamping grooves in the frames and are fixedly connected together through four corner pieces to form a complete structure; the upper frame is provided with the airflow outlet, and the lower frame is provided with the airflow inlet.
In one embodiment, an inner surface of the rear back plate opposite to the electrothermal conversion plate is provided with a thermal radiation reflective coating; a second surface of the electric heating conversion plate opposite to the rear back plate is provided with a second heat radiation enhancement coating; the outer surface of the second thermal radiation enhancement coating is frosted.
In one embodiment, the backplate is a non-metallic insulating material.
In one embodiment, an outer surface of the thermal radiation enhancement coating and/or the thermal radiation absorbing coating is frosted.
The invention has the beneficial effects that: the invention can greatly improve the working temperature of the electric heating conversion plate, improves the heat dissipation capability of the electric heating conversion plate by enhancing the infrared radiation heat conduction, obviously improves the electric heating conversion power of the wall-mounted electric heater in unit area, is not easy to be touched by users because the electric heating conversion plate is positioned in the middle of the wall-mounted electric heater, improves the safety performance, and can obtain better cost performance and use effect comprehensively.
Drawings
Fig. 1 is a schematic view of a wall-mounted electric heater in the prior art;
fig. 2 is a schematic diagram of a wall-mounted electric heater according to an embodiment of the present invention;
fig. 3 is a schematic distribution diagram of a plurality of strip-shaped resistive films on an electrothermal conversion plate of a wall-mounted electric heater according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating the distribution of a thermal radiation absorbing coating on a front panel of a wall-mounted electric heater according to an embodiment of the present invention;
fig. 5 is an exploded view of four side frames of a wall-mounted electric heater according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the invention are described in further detail below.
As shown in fig. 2, an embodiment of the wall-mounted electric heater includes a front panel 2, an electric heat conversion plate 3 and a back panel 4, when the wall-mounted electric heater is hung on a wall, the back plate 4 is positioned at one side close to the wall, the electric heating conversion plate 3 is positioned between the front panel 2 and the back plate 4, a first heat convection channel 5 is arranged between the front panel 2 and the electric heating conversion plate 3, a second heat convection channel 6 is arranged between the electric heating conversion plate 3 and the back plate 4, an airflow inlet of the first heat convection channel 5 and an airflow inlet of the second heat convection channel 6 are both positioned below the wall-mounted electric heater, an airflow outlet of the first heat convection channel 5 and an airflow outlet of the second heat convection channel 6 are both positioned above the wall-mounted electric heater, a thermal radiation enhancing coating is provided on a first surface of the electrothermal conversion plate opposite to the front panel, and correspondingly, a thermal radiation absorbing coating is provided on a first surface of the front panel opposite to the electrothermal conversion plate. The wall-mounted electric heater designed in this way adopts two modes of infrared radiation and natural convection to exchange heat with the indoor space. First thermal convection passageway 5 and second thermal convection passageway 6 are the front and back and keep apart independently, the air current in first thermal convection passageway 5 and the second thermal convection passageway 6 absorbs the heat from the electric heat transfer board 3 that is in high temperature state after the circular telegram and then expands and rise, flow from top air outlet, indoor cold air flows in the replenishment from below air inlet, realize circulation convection heat exchange, thermal radiation reinforcing coating and corresponding thermal radiation absorbing coating can improve infrared radiation absorption capacity, promote the thermal radiation heat-conduction ability of wall-hanging electric heater and the proportion in whole heat dissipation power, and then promote the unit area's of wall-hanging electric heater heating power.
In a preferred embodiment, the electrothermal converting plate as a core component of the wall-mounted electric heater has a multilayer composite structure, and includes a heat-dissipating substrate 32, an insulating film, and a plurality of strip-shaped resistive films 31 for generating heat, the insulating film and the resistive films being sequentially disposed on the heat-dissipating substrate, and the resistive films being located on a side close to the front panel. The heat dissipating substrate 32 may be a metal thin plate with good thermal conductivity, and the material may be aluminum, copper or steel, preferably an aluminum plate, because the aluminum foil has the advantages of good thermal conductivity, light weight, and being not easy to oxidize. One surface of the heat dissipation substrate 32 is coated with an insulating film in a bonding and hot-pressing manner, the thickness of the insulating film is as thin as possible to reduce thermal resistance on the premise of meeting the insulation requirement, and the resistive film 31 is prepared on the insulating film by means of pasting or screen printing. And then preparing the conductive silver paste interdigital electrode lead with high conductivity by screen printing, wherein the related parameters of the conductive silver paste interdigital electrode lead can be designed according to parameters such as power, current and voltage. When the electrothermal converting plate 3 works, a voltage forms a current in the resistive film 31 after passing through the interdigital electrode lead, and the required heat is generated.
Because the process that cold air entered into from the top outflow from the below can constantly absorb the heat, follow supreme temperature and constantly rise down, when electric heat conversion element of electric heat conversion board power distribution was even about, the upper and lower air convection leads to whole electric heat conversion board's the upper and lower difference in temperature to be showing, under the prerequisite that the control highest temperature does not exceed control limit, the lower half body temperature can appear lower, the average temperature of electric heat conversion board is far away from control temperature, the area of electric heat board can not effectively be utilized, this gradient difference increases along with the increase of height. Therefore, through optimization design, the electric heating conversion plate is designed to have non-uniform power density, and the power distribution density which is in gradient reduction along the height direction of the electric heating conversion plate from bottom to top, so that the heat generation capacity of the unit area is gradually reduced from bottom to top after electrification, the temperature gradient design is combined with the convection heat exchange effect from bottom to top, and the upper and lower temperature uniformity degree of the whole electric heating conversion plate can be improved. Therefore, in a further preferable scheme, the plurality of strip-shaped resistive films are distributed on the electrothermal conversion plate at intervals, the intervals are in gradient distribution which gradually increases from bottom to top along the height direction of the wall-mounted electric heater, that is, the areas of the resistive films in the unit area of the electrothermal conversion plate are in gradient distribution which gradually decreases from bottom to top, the unit area is the sum of the area of the locally arranged resistive films and the area of the blank area, under a certain voltage, the electrothermal conversion power per unit area is in direct proportion to the area of the resistive films in the area, obviously, by adopting the scheme of gradient spacing distribution of the resistive films, the electrothermal conversion power density is gradually reduced along the height direction, the upper and lower temperature gradients of the electrothermal conversion plate can be reduced, and the aim of improving. As shown in fig. 3, which is a schematic diagram of an example of the gradient distribution of the resistive film, in the figure, the electrothermal conversion is performed by the equal length resistive film arranged transversely in the figure, the bus bar 8 and the bus bar 9 are connected to serve as one power input end, the bus bar 10 serves as the other power input end, and when the power voltage V is switched on, a current is formed in the resistive film to generate heat in the gradient distribution.
Similarly, since the front panel is influenced by air convection, when the upper and lower temperatures of the electrothermal conversion plate are close to uniform, the front panel can obtain uniform heat, but the upper and lower convection dissipates, so that there is a gradient in the upper and lower temperatures of the front panel. By designing the upper and lower distribution areas of the infrared radiation absorbing coating on the front panel, the ability gradient of the front panel to obtain heat from top to bottom can be adjusted to be adapted to the convection dissipation gradient, so as to realize the temperature uniformity of the front panel, and the effect of improving the heat exchange capacity of the front panel can also be achieved by improving the temperature uniformity and increasing the average temperature of the body on the premise of limiting the maximum temperature of the front panel, therefore, in a preferred embodiment, as shown in fig. 4, the heat radiation absorbing coating arranged on the front panel locally covers the first surface of the front panel opposite to the electrothermal conversion plate in a distributed manner, and the blank areas without the heat radiation absorbing coating in the interval distribution are gradually increased from bottom to top along the height direction of the wall-mounted electric heater, and the heat radiation absorbing coating in the example shown in fig. 4 is distributed on the front panel in a strip-shaped interval manner, in other embodiments, the thermal radiation absorbing coating may also partially cover the first surface of the front panel in other geometrical shapes, continuous or discontinuous.
More preferably, the thermal radiation enhancement coating disposed on the electrothermal conversion plate also locally covers the first surface of the electrothermal conversion plate opposite to the front panel in a distributed manner, and the spaced blank areas without the thermal radiation absorption coating are gradually increased from bottom to top along the height direction of the wall-mounted electric heater.
In one embodiment, the front panel 2 is a metal plate, which may serve a decorative purpose, for example the appearance of the front panel 2 may be a painting.
In one embodiment, the wall-mounted electric heater may include four peripheral frames 7, an upper frame, a lower frame, a left frame, a right frame, a front panel 2, an electric heat conversion plate 3, and a back panel 4, which are positioned by the slots on the frames 7, and are fixedly connected together by four corner pieces to form an integral structure, and after the connection, a first thermal convection channel 5 and a second thermal convection channel 6 are formed, which are separated from each other in the front and back directions, and an air outlet 71 is formed on the upper frame, and an air inlet. As shown in fig. 5, which is an exploded schematic view of four frames in an example, a left frame and a right frame are closed, an upper frame and a lower frame are mesh-shaped, a mesh is used as an air inlet or an air outlet, the area of the mesh is as large as possible under the condition of ensuring safety (such as ensuring that a user's finger cannot penetrate into the mesh, ensuring the strength of the frames, etc.), and a front panel, an electric-to-heat conversion plate, and a back panel are connected with the four frames to form a first heat convection channel and a second heat convection channel which are isolated from each other. The electric heat conversion plate 3 generates heat after being electrified, and can heat the air flows of the first thermal convection channel 5 and the second thermal convection channel 6, so that upward thermal convection is formed in the first thermal convection channel 5 and the second thermal convection channel 6 respectively, as shown by upward arrows in fig. 2, hot air flows out from the upper air flow outlet 71, and indoor cold air flows in and is supplemented from the lower air flow inlet, so that circulating convection heat exchange is realized. Part of heat of the electric heating conversion plate 3 can be taken away by heat convection in time, and easily flows out from the airflow outlet, and cold air also easily flows in from the airflow inlet below; another part of the heat is dissipated through infrared heat radiation, after the inner surface (the surface opposite to the electrothermal conversion plate 3) of the front panel 2 absorbs the heat radiation of the electrothermal conversion plate 3, the heat is conducted to the outer surface (the surface opposite to the electrothermal conversion plate 3) of the front panel 2, and the heat is radiated out from the outer surface of the front panel 2 again, so as to heat the indoor space, as shown by the left transverse arrow direction in fig. 2.
Because the electric heat conversion plate 3 is located in the middle of the structure of the wall-mounted electric heater, it cannot be touched by the user, and in contrast, the electric heat conversion plate of the prior art is located on the front surface of the structure of the wall-mounted electric heater, and is easily touched by the user. Therefore, the surface temperature of the electrothermal conversion plate 3 is not limited by the safety of the user touching the scald, and therefore, the surface temperature of the electrothermal conversion plate 3, that is, the electrothermal conversion power of the electrothermal conversion plate 3, can be increased.
In order to make the wall-mounted electric heater safer to use, the surface temperature of the electric heat conversion plate 3 may be limited according to the temperature tolerance limit of the connected frame 7 and the temperature limit of the air flow discharged by convection after heating. For example, limiting the temperature of the exiting convective hot gas flow to no more than 100 degrees may be a limiting indicator.
By the above measures, the surface temperature of the electrothermal conversion plate can be raised to 120 degrees or more, thereby greatly increasing the electrothermal conversion power of the electrothermal conversion plate 3.
In a more preferred embodiment, the infrared radiation enhancement coating may be disposed on the strip-shaped resistive film to improve the ability of the resistive film 31 to emit infrared radiation forward (i.e., outward), and increase the contact area of the electrothermal conversion plate 3 with the airflow, the coating may be an insulating coating, has good electrical insulating ability, and improves safety, and may be made by sand blasting, anodic oxidation, or a coating process, and the coating material may be an infrared radiation enhancement coating that is conventional in the art, such as aluminum oxide and silicon dioxide powder that are compositely coated and dried in a ratio that is conventional in the art. The outer surface of the coating can be a frosted dark color surface, so that the outward infrared radiation capability can be greatly improved; and the frosted outer surface has microcosmic concave-convex, so that the specific surface area is increased, the heat exchange area of the electric heating conversion plate 3 contacting with the airflow is increased, and the heat exchange capacity is improved. In a preferred embodiment, a second thermal radiation enhancement coating may be provided on the side of the heat dissipation substrate 32 (i.e. the side opposite to the backplate 4) facing the backplate (i.e. the second surface of the electrothermal conversion plate opposite to the backplate), and the second thermal radiation enhancement coating may be frosted and have a micro-convex-concave structure, which may be achieved by increasing the surface roughness through sand blasting or coating process, and the increased surface area of the plate surface makes the same body temperature, so that more convective heat exchange capability can be obtained.
In a more preferred embodiment, the front panel 2 comprises a base body 21 and a thermal radiation absorbing coating 22, the thermal radiation absorbing coating 22 being located on a first surface of the front panel 2 on a side close to the electrothermal conversion plate 3 (opposite to the electrothermal conversion plate 3). The substrate 21 can be a metal plate with good heat conduction, preferably an aluminum alloy plate, and the substrate 21 can rapidly guide the heat of the inner surface of the front panel 2 to the outer surface; the thermal radiation absorbing coating 22 can improve the absorption capacity of thermal radiation (mainly infrared radiation) of the electrothermal conversion plate 3 as much as possible, the temperature of the inner surface is improved, then the thermal radiation and the surface air current convection are quickly conducted to the outer surface through the substrate 21 with high heat conductivity, and finally the thermal radiation and the surface air current convection on the outer surface are quickly dissipated indoors. In this embodiment, the thermal radiation absorbing coating 22 is an infrared radiation absorbing coating which is beneficial to improving the infrared radiation conduction capability, and can better absorb the heat radiated from the electrothermal conversion plate after being matched with the infrared radiation enhancing coating arranged on the electrothermal conversion plate, so that the front panel 2 reaches a higher temperature. After the design, the front panel 2 dissipates heat indoors through the convection of indoor airflow and airflow of the first thermal convection channel, and also becomes an infrared radiation source with strong infrared radiation capability because the infrared radiation absorbing the electric-to-heat conversion plate has higher body temperature, and dissipates heat indoors through the infrared radiation. The coating can be an insulating coating, has good electrical insulating capability and improved safety, can be manufactured by sand blasting, anodic oxidation or coating processes and the like, and can be an infrared radiation absorbing coating which is conventional in the field, such as an aluminum oxide and silicon dioxide powder which are prepared by compositely coating and drying according to a conventional proportion in the field. The outer surface of the coating can be a frosted dark color surface, so that the outward infrared radiation capability can be greatly improved; and the frosted outer surface has microcosmic concave-convex, thus improving the specific surface area, increasing the heat exchange area of the front panel 2 contacting with the airflow and improving the heat exchange capacity.
In one embodiment, the backplate 4 is made of a non-metallic insulating material, such as a thin sheet of epoxy fiberglass board, to reduce the conduction of heat to the wall. In a preferred embodiment, a heat radiation reflection film 41 is applied to the inner surface of the backboard 4 to effectively reflect the heat radiation (mainly infrared radiation) of the electrothermal conversion plate 3 in the direction of the backboard 4, thereby further reducing the ineffective loss of energy, and the outer surface 42 of the backboard 4 is against the wall.
According to the implementation mode of the invention, by optimally designing each component in the wall-mounted electric heater, the potentials of two heat exchange modes of infrared radiation and natural convection are fully exerted, the heat exchange capacity per unit area (volume) is improved, the power density ratio or the power area ratio of a product is improved, and the cost performance of the product is further improved.
The electric control system of the wall-mounted electric heater, provided by the invention, relates to the aspects of power on-off control under the limit control temperature, data instruction input and display of working mode setting and the like, and the electric control system comprises a microcontroller control circuit, a switch, a surface temperature and airflow temperature monitoring sensor and the like, which are conventional technologies in the field and are not described again.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. To those skilled in the art to which the invention relates, numerous changes, substitutions and alterations can be made without departing from the spirit of the invention, and these changes are deemed to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a wall-hanging electric heater, characterized by: the wall-mounted electric heater comprises an electric heating conversion plate, a front panel and a back panel, wherein the electric heating conversion plate is positioned between the front panel and the back panel, a first heat convection channel is arranged between the front panel and the electric heating conversion plate, a second heat convection channel is arranged between the electric heating conversion plate and the back panel, airflow inlets of the first heat convection channel and the second heat convection channel are positioned below the wall-mounted electric heater, airflow outlets of the first heat convection channel and the second heat convection channel are positioned above the wall-mounted electric heater, and the first heat convection channel and the second heat convection channel are isolated and independent from each other; electrothermal conversion board with the relative first surface of front panel is equipped with thermal radiation reinforcing coating, correspondingly front panel with the relative first surface of electrothermal conversion board is equipped with thermal radiation absorbed coating, the front panel is the metal sheet set up on the front panel thermal radiation absorbed coating distributing type local cover the front panel with the relative first surface of electrothermal conversion board, and interval distribution does not have thermal radiation absorbed coating's blank area is followed the direction of height from the bottom up of wall-hanging electric heater is crescent.
2. The wall-mounted electric heater according to claim 1, wherein the electrothermal converting plate includes a heat-dissipating substrate, an insulating film, and a plurality of strip-shaped resistive films for generating heat, the insulating film and the resistive films being sequentially disposed on the heat-dissipating substrate, the resistive films being located at a side near the front panel.
3. The wall-mounted electric heater according to claim 2, wherein the plurality of strip-shaped resistive films are spaced apart from each other on the electrothermal converting plate, and the spacing gradually increases from bottom to top along the height direction of the wall-mounted electric heater.
4. A wall-mounted electric heater as claimed in any of claims 1-3, wherein the thermal radiation enhancement coating disposed on the electrothermal conversion plate is distributed to partially cover a first surface of the electrothermal conversion plate opposite to the front panel, and the spaced empty areas without the thermal radiation enhancement coating are gradually increased from bottom to top along the height direction of the wall-mounted electric heater.
5. A wall-mounted electric heater as claimed in any of claims 1-3, further comprising four peripheral frames, an upper frame, a lower frame, a left frame, a right frame, a front panel, an electric-to-heat conversion plate, and a back panel, wherein the four frames are positioned by the slots on the frames and are fixedly connected together by four corner pieces to form an integral structure, and the first thermal convection channel and the second thermal convection channel which are isolated from each other in the front-to-back direction are formed between the electric-to-heat conversion plate and the front panel and between the electric-to-heat conversion plate and the back panel after being connected; the upper frame is provided with the airflow outlet, and the lower frame is provided with the airflow inlet.
6. A wall electric heater as claimed in any of claims 1 to 3, wherein the inner surface of the rear panel opposite the electrothermal conversion plate is provided with a thermal radiation reflective coating; a second surface of the electric heating conversion plate opposite to the rear back plate is provided with a second heat radiation enhancement coating; the outer surface of the second thermal radiation enhancement coating is frosted.
7. A wall electric heater as claimed in any of claims 1 to 3, wherein the backplate is of non-metallic insulating material.
8. A wall electric heater as claimed in any of claims 1 to 3, wherein the outer surface of the thermal radiation enhancement coating and/or the thermal radiation absorption coating is frosted.
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| CN201710050106.6A CN107339738B (en) | 2017-01-20 | 2017-01-20 | Wall-mounted electric heater |
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| CN201710050106.6A CN107339738B (en) | 2017-01-20 | 2017-01-20 | Wall-mounted electric heater |
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| CN107339738A CN107339738A (en) | 2017-11-10 |
| CN107339738B true CN107339738B (en) | 2020-05-08 |
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| CN202675431U (en) * | 2012-06-18 | 2013-01-16 | 吴继忠 | Aluminium alloy electric heating film radiator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| ES1042460Y (en) * | 1999-02-24 | 2000-05-16 | Heating Elements I Z S L | PERFECTED ELECTRIC RADIATOR. |
| CN203533684U (en) * | 2013-10-18 | 2014-04-09 | 宁波图兰多电器有限公司 | Plate type wall-mounted electric warmer |
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2017
- 2017-01-20 CN CN201710050106.6A patent/CN107339738B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2285111Y (en) * | 1996-12-13 | 1998-07-01 | 汕头市粤锴精密模具有限公司 | Energy saving oven for toasting |
| CN201779753U (en) * | 2010-02-08 | 2011-03-30 | 北京桑普电器有限公司 | Carbon gold silicon compound electric heater |
| CN202675431U (en) * | 2012-06-18 | 2013-01-16 | 吴继忠 | Aluminium alloy electric heating film radiator |
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| CN107339738A (en) | 2017-11-10 |
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