CN106839407B - Multi-section heating type electric heater - Google Patents
Multi-section heating type electric heater Download PDFInfo
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- CN106839407B CN106839407B CN201611242528.5A CN201611242528A CN106839407B CN 106839407 B CN106839407 B CN 106839407B CN 201611242528 A CN201611242528 A CN 201611242528A CN 106839407 B CN106839407 B CN 106839407B
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- heating element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
- Cookers (AREA)
Abstract
The invention provides a multi-section heating type electric heater, which comprises an explosion-proof junction box, an explosion-proof cover, a container body and a container cover, wherein the heater of the container body is divided into a first chamber, a second chamber and a third chamber by arranging a first partition plate and a second partition plate, a first heating element, a second heating element, a third heating element and a fourth heating element are arranged in the heating chamber, the lengths of the first heating element, the second heating element, the third heating element and the fourth heating element are sequentially increased, the first heating element is arranged in the first chamber, one end of the second heating element penetrates through the first partition plate and extends into the second chamber, and one ends of the third heating element and the fourth heating element respectively penetrate through the first partition plate and extend into the third chamber. The invention prolongs the retention time of the fluid in the container body, so that the fluid is fully contacted with the heating element, the fluid can be fully heated, the heating effect is good, and the working efficiency is high; and the fluid is heated by adopting a multi-section heating mode, so that the heating effect is improved.
Description
Technical Field
The invention relates to the technical field of electric heaters, in particular to a multi-section heating type electric heater.
Background
The explosion-proof electric heater comprises a container shell, an explosion-proof chamber, a plurality of electric heating pipes and a plurality of transition sleeves, wherein the container shell is provided with an inlet and an outlet; the container shell of the existing explosion-proof electric heater is mostly a straight cylindrical pipe body, and the electric heating pipe is arranged in the container shell, so that the stroke of fluid in the container shell is short, the fluid can not be heated sufficiently, and the heating effect is not ideal.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a multi-section heating type electric heater.
The invention provides a multi-section heating type electric heater, which comprises an explosion-proof junction box, an explosion-proof cover, a container body and a container cover, wherein:
the explosion-proof junction box is of a cylinder structure with an opening at one end, an explosion-proof cavity is arranged in the explosion-proof junction box, and a plurality of power interfaces are arranged on the outer side of the explosion-proof junction box; the explosion-proof cover is matched with the opening end of the explosion-proof junction box to seal the explosion-proof cavity;
the container body is of a cylinder structure with an opening at one end, a heating cavity is arranged in the container body, the container cover is matched with the opening end of the container body to seal the heating cavity, a cooling cavity is arranged in the container cover, and a circulating cooling medium is injected into the cooling cavity; the heating cavity is divided into a first cavity, a second cavity and a third cavity by the first partition plate and the second partition plate at intervals along the length direction of the container body, the first partition plate is provided with a plurality of first through holes for communicating the first cavity with the second cavity, the second partition plate is provided with a plurality of second through holes for communicating the second cavity with the third cavity, and the side wall of the container body is provided with a fluid inlet communicated with the first cavity and a fluid outlet communicated with the third cavity; a plurality of first heating elements, a plurality of second heating elements, a plurality of third heating elements and a plurality of fourth heating elements are arranged in the heating cavity, and the lengths of the first heating elements, the second heating elements, the third heating elements and the fourth heating elements are sequentially increased; the first heating element is arranged in the first cavity, and one end of the first heating element sequentially penetrates through the cooling cavity and the container cover to extend into the explosion-proof cavity and is connected with the power supply interface through a lead; one end of the second heating element penetrates through the first partition plate and extends into the second cavity, and the other end of the second heating element sequentially penetrates through the cooling cavity and the container cover and extends into the explosion-proof cavity and is connected with the power supply interface through a lead; one ends of the third heating element and the fourth heating element penetrate through the first partition plate and the second partition plate and extend into the third cavity, and the other ends of the third heating element and the fourth heating element sequentially penetrate through the cooling cavity and the container cover and extend into the explosion-proof cavity and are connected with the power supply interface through wires respectively.
Preferably, a first sleeve is sleeved outside a section of the first heating element between the explosion-proof junction box and the container body, one end of the first sleeve is hermetically connected with the explosion-proof junction box, and the other end of the first sleeve penetrates through the cooling cavity to be hermetically connected with the container cover.
Preferably, a second sleeve is sleeved outside one end of the second heating element between the explosion-proof junction box and the container body, one end of the second sleeve is hermetically connected with the explosion-proof junction box, and the other end of the second sleeve penetrates through the cooling cavity to be hermetically connected with the container cover.
Preferably, a third sleeve is sleeved outside one end of the third heating element between the explosion-proof junction box and the container body, one end of the third sleeve is hermetically connected with the explosion-proof junction box, and the other end of the third sleeve penetrates through the cooling cavity to be hermetically connected with the container cover.
Preferably, first heating element sets up in container body central point, and a plurality of second heating element, a plurality of third heating element, a plurality of fourth heating element all use first heating element to be the circumference distribution as the center, and the diameter of second heating element, third heating element, fourth heating element place circumference increases in proper order.
Preferably, the first heating element includes a first inner tube, a first outer tube disposed outside the first inner tube, and a first heating wire sealed between the first inner tube and the first outer tube.
Preferably, the second heating element includes a second inner pipe body, a second outer pipe body disposed outside the second inner pipe body, and a second heating wire sealed between the second inner pipe body and the second outer pipe body.
Preferably, the third heating element includes a third inner tube, a third outer tube disposed outside the third inner tube, and a third heating wire sealed between the third inner tube and the third outer tube.
Preferably, the fourth heating element includes a fourth inner tube, a fourth outer tube disposed outside the fourth inner tube, and a fourth heating wire sealed between the fourth inner tube and the fourth outer tube.
Preferably, the outer side of the container body is wrapped with an insulating layer made of glass fiber or asbestos material.
According to the invention, the heater of the container body is divided into a first chamber, a second chamber and a third chamber by arranging a first partition plate and a second partition plate, a first heating element, a second heating element, a third heating element and a fourth heating element are arranged in the heating chamber, the lengths of the first heating element, the second heating element, the third heating element and the fourth heating element are sequentially increased, the first heating element is arranged in the first chamber, one end of the second heating element penetrates through the first partition plate and extends into the second chamber, and one ends of the third heating element and the fourth heating element respectively penetrate through the first partition plate and the second partition plate and extend into the third chamber. When the heating device works, fluid to be heated is led into the heating cavity from the fluid inlet, the fluid firstly enters the first cavity, enters the second cavity after being heated by the first heating element, the second heating element, the third heating element and the fourth heating element in the first cavity, enters the third cavity after being heated by the second heating element, the third heating element and the fourth heating element in the second cavity, and is discharged from the fluid outlet after being heated by the third heating element and the fourth heating element in the third cavity. Through the electric heater, the retention time of the fluid in the container body is prolonged, the fluid is fully contacted with the heating element, the fluid can be fully heated, the heating effect is good, and the working efficiency is high; the fluid is heated in a multi-section heating mode, so that the heating effect is improved; through set up the cooling chamber in the container lid, the cooling intracavity is annotated and is had the circulation cooling medium, avoids heat transfer to explosion-proof intracavity, causes the accident. Furthermore, first heating element sets up in container body central point and puts, a plurality of second heating element, a plurality of third heating element, a plurality of fourth heating element all uses first heating element to be the circumference distribution as the center, and the second heating element, third heating element, the diameter of fourth heating element place circumference increases in proper order for first heating element, second heating element, third heating element, fourth heating element is big with fluid area of contact, the heat dissipation is even, heating effect is good, the high just heating temperature of rate of heating.
Drawings
Fig. 1 is a schematic structural view of a multi-stage heating type electric heater according to the present invention;
FIG. 2 is a schematic structural diagram of a first heating element of the multi-stage heating type electric heater according to the present invention;
FIG. 3 is a schematic structural view of a second heating element of the multi-stage heating type electric heater according to the present invention;
FIG. 4 is a schematic structural view of a third heating element of the multi-stage heating type electric heater according to the present invention;
fig. 5 is a schematic structural diagram of a fourth heating element in the multi-stage heating electric heater according to the present invention.
Detailed Description
Referring to fig. 1, the present invention provides a multi-stage heating type electric heater, comprising an explosion-proof junction box 1, an explosion-proof cover 2, a container body 3, and a container cover 4, wherein:
referring to fig. 1, an explosion-proof junction box 1 is a cylinder structure with an opening at one end, an explosion-proof cavity 5 is arranged in the explosion-proof junction box 1, and a plurality of power interfaces 6 are arranged outside the explosion-proof junction box 1; the explosion-proof cover 2 is matched with the opening end of the explosion-proof junction box 1 to seal the explosion-proof cavity 5.
Referring to fig. 1, container body 3 is one end open-ended tubular structure, is equipped with the heating chamber in the container body 3, and container lid 4 cooperatees with the 3 open ends of the container body and seals the heating chamber, is equipped with cooling chamber 7 in the container lid 4, and the interior recirculated cooling medium that has annotated of cooling chamber 7. First baffle 8, second baffle 9, first baffle 8, second baffle 9 separates into first cavity 10 with the heating chamber along container body 3 length direction interval arrangement in the heating chamber, second cavity 11, third cavity 12, be equipped with the first through-hole 13 of a plurality of first cavities 10 of intercommunication and second cavity 11 on the first baffle 8, be equipped with the second through-hole 14 of a plurality of second cavities 11 of intercommunication and third cavity 12 on the second baffle 9, be equipped with the fluid inlet 15 that communicates with first cavity 10 and the fluid outlet 16 that communicates with third cavity 12 on the container body 3 lateral wall. A plurality of first heating elements 17, a plurality of second heating elements 18, a plurality of third heating elements 19 and a plurality of fourth heating elements 20 are arranged in the heating cavity, and the lengths of the first heating elements 17, the second heating elements 18, the third heating elements 19 and the fourth heating elements 20 are increased in sequence. The first heating element 17 is arranged in the first chamber 10, and one end of the first heating element penetrates through the cooling cavity 7 and the container cover 4 in sequence to extend into the explosion-proof cavity 5 and is connected with the power interface 6 through a lead; one end of a second heating element 18 penetrates through the first partition plate 8 and extends into the second chamber 11, and the other end of the second heating element 18 sequentially penetrates through the cooling cavity 7 and the container cover 4 and extends into the explosion-proof cavity 5 and is connected with the power supply interface 6 through a lead; one ends of the third heating element 19 and the fourth heating element 20 penetrate through the first partition plate 8 and the second partition plate 9 and extend into the third chamber 12, and the other ends of the third heating element 19 and the fourth heating element 20 penetrate through the cooling chamber 7 and the container cover 4 in sequence and extend into the explosion-proof chamber 5 and are connected with the power supply interface 6 through conducting wires respectively.
Referring to fig. 1, in the present embodiment, the first heating element 17 is disposed at a central position of the container body 3, the plurality of second heating elements 18, the plurality of third heating elements 19, and the plurality of fourth heating elements 20 are circumferentially distributed around the first heating element 17, and diameters of circumferences where the second heating elements 18, the third heating elements 19, and the fourth heating elements 20 are located are sequentially increased. The contact area of the first heating element 17, the second heating element 18, the third heating element 19 and the fourth heating element 20 with the fluid is large, the heat dissipation is uniform, the heating effect is good, the heating speed is high, and the temperature is heated.
Referring to fig. 1 and 2, in the embodiment, a first sleeve 21 is sleeved on the outer portion of the first heating element 17 between the explosion-proof junction box 1 and the container body 3, one end of the first sleeve 21 is hermetically connected with the explosion-proof junction box 1, and the other end of the first sleeve 21 penetrates through the cooling cavity 7 to be hermetically connected with the container cover 4. The first heating element 17 includes a first inner tube 1701, a first outer tube 1702 disposed outside the first inner tube 1701, and a first heating wire 1703 sealed between the first inner tube 1701 and the first outer tube 1702.
Referring to fig. 1 and 3, in the embodiment, a second sleeve 22 is sleeved outside one end of the second heating element 18 between the explosion-proof junction box 1 and the container body 3, one end of the second sleeve 22 is hermetically connected with the explosion-proof junction box 1, and the other end of the second sleeve 22 penetrates through the cooling cavity 7 to be hermetically connected with the container cover 4. The second heating element 18 includes a second inner tube body 1801, a second outer tube body 1802 disposed outside the second inner tube body 1801, and a second heating wire 1803 sealed between the second inner tube body 1801 and the second outer tube body 1802.
Referring to fig. 1 and 4, in the embodiment, a third sleeve 23 is sleeved outside one end of the third heating element 19 between the explosion-proof junction box 1 and the container body 3, one end of the third sleeve 23 is hermetically connected with the explosion-proof junction box 1, and the other end of the third sleeve 23 penetrates through the cooling cavity 7 to be hermetically connected with the container cover 4. The third heating element 19 includes a third inner tube 1901, a third outer tube 1902 disposed outside the third inner tube 1901, and a third heating wire 1903 sealed between the third inner tube 1901 and the third outer tube 1902.
Referring to fig. 1 and 5, in the embodiment, a fourth sleeve 24 is sleeved outside one end of the fourth heating element 20 between the explosion-proof junction box 1 and the container body 3, one end of the fourth sleeve 24 is hermetically connected with the explosion-proof junction box 1, and the other end of the fourth sleeve 24 penetrates through the cooling cavity 7 to be hermetically connected with the container cover 4. The fourth heating element 20 includes a fourth inner tube 2001, a fourth outer tube body 2002 disposed outside the fourth inner tube 2001, and a fourth heating wire 2003 sealed between the fourth inner tube 2001 and the fourth outer tube body 2002.
When the multi-section heating type electric heater works, fluid to be heated is led into a heating cavity from a fluid inlet 15, the fluid firstly enters a first cavity 10, enters a second cavity 11 after being heated by a first heating element 17, a second heating element 18, a third heating element 19 and a fourth heating element 20 in the first cavity 10, enters a third cavity 12 after being heated by the second heating element 18, the third heating element 19 and the fourth heating element 20 in the second cavity 11, and is discharged from a fluid outlet 16 after being heated by the third heating element 19 and the fourth heating element 20 in the third cavity 12. Through the electric heater, the retention time of the fluid in the container body 1 is prolonged, the fluid is fully contacted with the heating element, the fluid can be fully heated, the heating effect is good, and the working efficiency is high; the fluid is heated in a multi-section heating mode, so that the heating effect is improved; through set up cooling chamber 7 in container lid 4, be annotated with the recirculated cooling medium in cooling chamber 7, avoid heat transfer to explosion-proof cavity 5 in, cause the accident.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The utility model provides a multistage heating type electric heater which characterized in that, includes explosion-proof terminal box (1), explosion-proof lid (2), container body (3), container lid (4), wherein:
the explosion-proof junction box (1) is of a cylinder structure with an opening at one end, an explosion-proof cavity (5) is arranged in the explosion-proof junction box (1), and a plurality of power interfaces (6) are arranged on the outer side of the explosion-proof junction box (1); the explosion-proof cover (2) is matched with the opening end of the explosion-proof junction box (1) to seal the explosion-proof cavity (5);
the container body (3) is of a cylinder structure with an opening at one end, a heating cavity is arranged in the container body (3), the container cover (4) is matched with the opening end of the container body (3) to seal the heating cavity, a cooling cavity (7) is arranged in the container cover (4), and a circulating cooling medium is injected into the cooling cavity (7); first partition plates (8) and second partition plates (9) are arranged in the heating cavity at intervals along the length direction of the container body (3), the heating cavity is divided into a first cavity (10), a second cavity (11) and a third cavity (12) by the first partition plates (8) and the second partition plates (9), a plurality of first through holes (13) which are communicated with the first cavity (10) and the second cavity (11) are formed in the first partition plates (8), a plurality of second through holes (14) which are communicated with the second cavity (11) and the third cavity (12) are formed in the second partition plates (9), and a fluid inlet (15) communicated with the first cavity (10) and a fluid outlet (16) communicated with the third cavity (12) are formed in the side wall of the container body (3); a plurality of first heating elements (17), a plurality of second heating elements (18), a plurality of third heating elements (19) and a plurality of fourth heating elements (20) are arranged in the heating cavity, and the lengths of the first heating elements (17), the second heating elements (18), the third heating elements (19) and the fourth heating elements (20) are sequentially increased; the first heating element (17) is arranged in the first chamber (10), and one end of the first heating element sequentially penetrates through the cooling cavity (7) and the container cover (4) to extend into the explosion-proof cavity (5) and is connected with the power interface (6) through a lead; one end of a second heating element (18) penetrates through the first partition plate (8) and extends into the second chamber (11), and the other end of the second heating element (18) penetrates through the cooling cavity (7) and the container cover (4) in sequence and extends into the explosion-proof cavity (5) and is connected with the power interface (6) through a lead; one ends of a third heating element (19) and a fourth heating element (20) penetrate through the first partition plate (8) and the second partition plate (9) and extend into the third cavity (12), and the other ends of the third heating element (19) and the fourth heating element (20) penetrate through the cooling cavity (7) and the container cover (4) in sequence and extend into the explosion-proof cavity (5) and are connected with the power supply interface (6) through leads respectively;
the first heating element (17) sets up in container body (3) central point and puts, and a plurality of second heating element (18), a plurality of third heating element (19), a plurality of fourth heating element (20) all use first heating element (17) to be the circumference distribution as the center, and the diameter of second heating element (18), third heating element (19), fourth heating element (20) place circumference increases in proper order.
2. The multi-sectional heating type electric heater according to claim 1, wherein the first heating element (17) is provided between the explosion-proof junction box (1) and the container body (3) and is externally sleeved with a first sleeve (21), one end of the first sleeve (21) is hermetically connected with the explosion-proof junction box (1) and the other end thereof passes through the cooling chamber (7) to be hermetically connected with the container cover (4).
3. The multi-sectional heating type electric heater according to claim 1, wherein the second heating element (18) is externally sleeved with a second sleeve (22) at one end between the explosion-proof junction box (1) and the container body (3), one end of the second sleeve (22) is hermetically connected with the explosion-proof junction box (1) and the other end thereof passes through the cooling chamber (7) to be hermetically connected with the container cover (4).
4. A multi-sectional heating type electric heater according to any one of claims 1 to 3, wherein the third heating element (19) is externally sleeved with a third sleeve (23) at one end between the explosion-proof junction box (1) and the container body (3), one end of the third sleeve (23) is hermetically connected with the explosion-proof junction box (1) and the other end thereof passes through the cooling chamber (7) to be hermetically connected with the container cover (4).
5. A multi-sectional heating type electric heater according to any one of claims 1 to 3, wherein the fourth heating element (20) is externally sleeved with a fourth sleeve (24) at one end between the explosion-proof junction box (1) and the container body (3), one end of the fourth sleeve (24) is hermetically connected with the explosion-proof junction box (1) and the other end thereof passes through the cooling chamber (7) to be hermetically connected with the container cover (4).
6. The multi-section heatable electric heater according to any of claims 1-3, characterized in that the first heating element (17) comprises a first inner tube (1701), a first outer tube (1702) arranged outside the first inner tube (1701), and a first heating wire (1703) sealed between the first inner tube (1701) and the first outer tube (1702).
7. A multi-section heatable electric heater according to any one of claims 1-3, characterized in that the second heating element (18) comprises a second inner tube body (1801), a second outer tube body (1802) arranged outside the second inner tube body (1801), and a second heating wire (1803) sealed between the second inner tube body (1801) and the second outer tube body (1802).
8. The multi-section heatable electric heater according to any of claims 1-3, wherein the third heating element (19) comprises a third inner tube (1901), a third outer tube (1902) disposed outside the third inner tube (1901), and a third heating wire (1903) sealed between the third inner tube (1901) and the third outer tube (1902).
9. The multi-sectional heating type electric heater according to any one of claims 1 to 3, wherein the fourth heating element (20) includes a fourth inner tube (2001), a fourth outer tube (2002) disposed outside the fourth inner tube (2001), and a fourth heating wire (2003) sealed between the fourth inner tube (2001) and the fourth outer tube (2002).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611242528.5A CN106839407B (en) | 2016-12-29 | 2016-12-29 | Multi-section heating type electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611242528.5A CN106839407B (en) | 2016-12-29 | 2016-12-29 | Multi-section heating type electric heater |
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| Publication Number | Publication Date |
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| CN106839407A CN106839407A (en) | 2017-06-13 |
| CN106839407B true CN106839407B (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611242528.5A Active CN106839407B (en) | 2016-12-29 | 2016-12-29 | Multi-section heating type electric heater |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108012355B (en) * | 2017-12-29 | 2023-11-10 | 安徽省宁国市天成电机有限公司 | Hanging type heating pipe for water heating |
| CN108024398B (en) * | 2017-12-29 | 2023-12-15 | 安徽省宁国市天成电机有限公司 | High-efficiency anti-slip adjustable hanging type heating pipe for water heating |
| CN112616206B (en) * | 2020-12-30 | 2023-04-21 | 江苏亚电科技有限公司 | Online heater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008121940A (en) * | 2006-11-09 | 2008-05-29 | Toto Ltd | Hot water storage type electric water heater |
| CN202229170U (en) * | 2011-08-25 | 2012-05-23 | 深圳市大益节能科技有限公司 | High-temperature steam generating device |
| CN203824047U (en) * | 2014-04-28 | 2014-09-10 | 大庆昌圣工程技术有限公司 | Electric heater for tube power transmission |
| CN104214937A (en) * | 2014-09-11 | 2014-12-17 | 苏州巨浪热水器有限公司 | Separately-controlled type rapid water heater |
-
2016
- 2016-12-29 CN CN201611242528.5A patent/CN106839407B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008121940A (en) * | 2006-11-09 | 2008-05-29 | Toto Ltd | Hot water storage type electric water heater |
| CN202229170U (en) * | 2011-08-25 | 2012-05-23 | 深圳市大益节能科技有限公司 | High-temperature steam generating device |
| CN203824047U (en) * | 2014-04-28 | 2014-09-10 | 大庆昌圣工程技术有限公司 | Electric heater for tube power transmission |
| CN104214937A (en) * | 2014-09-11 | 2014-12-17 | 苏州巨浪热水器有限公司 | Separately-controlled type rapid water heater |
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| CN106839407A (en) | 2017-06-13 |
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