CN204100594U - Anti-dry burning device and electric heater - Google Patents
Anti-dry burning device and electric heater Download PDFInfo
- Publication number
- CN204100594U CN204100594U CN201420019774.4U CN201420019774U CN204100594U CN 204100594 U CN204100594 U CN 204100594U CN 201420019774 U CN201420019774 U CN 201420019774U CN 204100594 U CN204100594 U CN 204100594U
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- China
- Prior art keywords
- electric heater
- ptc heating
- heater
- heating tube
- dry
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000010438 heat treatment Methods 0.000 claims abstract description 81
- 239000002184 metal Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 27
- 238000009841 combustion method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 230000001012 protector Effects 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Resistance Heating (AREA)
Abstract
The utility model discloses a kind of anti-dry burning device, be applicable to the anti-dry protection of electric heater, this anti-dry burning device comprises PTC heating tube, and the current supply circuit of described PTC heating tube is connected with the current supply circuit of described electric heater.The invention also discloses a kind of electric heater.As can be seen here, anti-dry burning device of the present utility model does not need testing circuit and control circuit, and not only structure is simple, and can carry out anti-dry protection timely and accurately, guarantees that Electrical Safety is reliable.
Description
Technical field
The utility model relates to electric heater technical field, especially relates to a kind of anti-dry burning device and electric heater.
Background technology
Along with the raising of people's living standard, electric heater is widely used in average family, meanwhile, the use safety problem of electric heater also causes everybody attention gradually, and wherein the anti-dry performance of electric heater becomes the important indicator that consumers in general select electric heater.In the prior art, conventional preventing dry burning of electric water heater control mode is temperature control type and water level detecting type.
For the anti-dry control mode of temperature control type; inner bag is provided with the outside of the end of heater or flange arranged outside thermal protector (temperature controller) of heater; when thermal protector senses that the flange of liner holder or heater reaches preset temperature, thermal protector action also cuts off heating installation power supply circuit.Because the flange of liner holder and heater is away from effective bringing-up section of heater; the temperature that thermal protector detects effective bringing-up section of heater has certain hysteresis quality; before the non-regular event of thermal protector; the phenomenon that heater damages because of long-time dry combustion method, anti-dry poor effect may be there is.
For the anti-dry control mode of water level detecting type, the Heater flange of electric heater arranges two insulating mounting and the anti-dry heating electrode stretched in inner bag, when the water level in inner bag rises and crosses two anti-dry heating electrodes, two anti-dry heating electrode conductings, the current supply circuit of controller circuitry conducting heater; When the water level in inner bag is lower than one of them anti-dry heating electrode, the electrical connection between two anti-dry heating electrodes disconnects, and control circuit disconnects the current supply circuit of heater, forms anti-dry protection.Whether this anti-dry burning device forms loop judge water heater whether no-water dry combustion by detecting two anti-dry heating electrodes, there is following shortcoming in it: one, anti-dry heating electrode and Heater flange insulating mounting, this can make the mounting structure of heater complicated, and increases the risk occurring because of poorly sealed leaking; Two, anti-dry heating electrode shell is metal material, long period of soaking in the hot water time, its surface can generate incrustation scale, when incrustation scale reaches certain thickness, two anti-dry heating electrodes can be hindered to form loop by water body, thus affects water heater and normally work.
Foregoing only understands the technical solution of the utility model for auxiliary, does not represent and admits that foregoing is prior art.
Utility model content
Main purpose of the present utility model is to provide a kind of anti-dry burning device and electric heater, is intended to carry out anti-dry protection timely and accurately, guarantees that Electrical Safety is reliable.
For achieving the above object, the utility model provides a kind of anti-dry burning device, and be applicable to the anti-dry protection of electric heater, this anti-dry burning device comprises PTC heating tube, and the current supply circuit of described PTC heating tube is connected with the current supply circuit of described electric heater.
Preferably, described PTC heating tube comprises metal outer pipe, the insulated end cover, first closed one end and draws rod, second and draw rod, PTC heating element heater and insulated heat-conducting medium; Described insulated heat-conducting medium is filled in described metal outer pipe, described PTC heating element heater is embedded in described insulated heat-conducting medium, the openend of described insulated end cover and described metal outer pipe is tightly connected, described first draws rod and second draws rod through described insulated end cover and part stretches in described metal outer pipe, and described first draws rod draws excellent electrical connection via described PTC heating element heater and described second.
Preferably, described PTC heating element heater is bar-shaped PTC pottery, and described PTC pottery is clipped in described first and draws rod and described second to draw between rod.
Preferably, described first draws rod, second draws rod and PTC pottery be arranged in parallel between two, and extends to the terminal position near described metal outer pipe.
The utility model provides a kind of electric heater further, it comprises inner bag and electric heater, described electric heater is arranged on described inner bag by flange, in addition, this electric heater also comprises the anti-dry burning device of above-mentioned any embodiment, described anti-dry burning device comprises PTC heating tube, and the current supply circuit of described PTC heating tube is connected with the current supply circuit of described electric heater.
Preferably, described PTC heating tube is arranged on described flange, and is positioned at the top of described electric heater.
Preferably, this electric heater also comprises temperature tube, and described temperature tube is arranged on described flange, and between described PTC heating tube and described electric heater.
Preferably, this electric heater also comprises electric-controlled plate and alarm module, and described alarm module is electrically connected with described electric-controlled plate.
A kind of anti-dry burning device provided by the utility model and electric heater, by adopting, there is the positive temperature coefficient of PTC() the PTC heating tube of characteristic is as the dry combustion method detecting element of electric heater, when PTC heating tube is immersed in water, PTC heating tube normal heating, its resistance is less, the electric current of the current supply circuit of electric heater can not be affected, now electric heater normal heating; When water level decreasing is to position lower than PTC heating tube place; the dry combustion method of PTC heating tube; its temperature constantly raises; according to ptc characteristics; after the temperature of PTC heating tube crosses curie point, its resistance sharply increases, and makes the electric current of the current supply circuit of PTC heating tube be decreased to close to zero; thus cut off the current supply circuit of electric heater, realize anti-dry protection.As can be seen here, anti-dry burning device of the present utility model does not need testing circuit and control circuit, and not only structure is simple, and can carry out anti-dry protection timely and accurately, guarantees that Electrical Safety is reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model electric heater preferred embodiment;
Fig. 2 is the structural representation of the utility model anti-dry burning device preferred embodiment;
Fig. 3 is the structural representation of the PTC heating tube shown in Fig. 2;
Fig. 4 is the control principle drawing of the utility model anti-dry burning device;
Fig. 5 is PTC pottery temperature and resistance characteristic figure.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of electric heater, see Fig. 1, in one embodiment, this electric heater comprises inner bag 11, electric heater 13 and electric-controlled plate 12, and inner bag 11 is provided with water inlet 111, delivery port 112 and sewage draining exit 113, and inner bag 11 is in cylindrical structure extending longitudinally, and be horizontal layout, electric heater 13 by flange 16(see Fig. 2) be arranged on the axial end portion of inner bag 11, electric heater 13 is electrically connected with electric-controlled plate 12, under the control of electric-controlled plate 12, realize electrified regulation.In addition, this electric heater also comprises the shell 10 for accommodating inner bag 11, is arranged between shell 10 and inner bag 11, for the heat-insulation layer (not shown) of heat-insulation and heat-preservation.It should be noted that, this electric heater also comprises other associated components known by those skilled in the art, thus forms an electric heater that is complete, that can normally use, and therefore not to repeat here.
In order to improve the safety in utilization of electric heater, avoid the water level due to inner bag 11 too low and occur the phenomenon of electric heater 13 dry combustion method, the electric heater of the present embodiment also comprises an anti-dry burning device.See Fig. 2 and Fig. 4, particularly, this anti-dry burning device comprises PTC heating tube 15, and the current supply circuit of this PTC heating tube 15 is connected with the current supply circuit of electric heater 13.In the present embodiment, PTC heating tube 15 is for having the positive temperature coefficient of PTC() heating element heater of characteristic, in better embodiment, PTC heating tube 15 is arranged on flange 16, and be positioned at the top of electric heater 13, in the process that electric heater normally works, PTC heating tube 15 can water body in electrical auxiliary heater 13 heating inner liner 11, simultaneously as the dry combustion method detecting element of electric heater 13, electric heater 13 is avoided to occur the phenomenon of dry combustion method.The operation principle of anti-dry burning device is specially:
When PTC heating tube 15 is immersed in water, PTC heating tube 15 normal heating, power is more constant, and its resistance is less, therefore can not affect the operating current of electric heater 13, electric heater 13 normal heating; When using the hot water of electric heater; water level in inner bag 11 can decline gradually; when water level decreasing is to position lower than PTC heating tube 15 place; PTC heating tube 15 surfaces; PTC heating tube 15 dry combustion method; its temperature sharply rises; according to ptc characteristics (see Fig. 5; when exceeding uniform temperature, resistance value is the increase of step evolution with the rising of temperature), the resistance of PTC heating tube 15 also sharply increases; therefore the electric current of the current supply circuit of PTC heating tube 15 sharply reduces; until close to zero, electric heater 13 stops heating, thus realizes anti-dry protection.As can be seen here, anti-dry burning device of the present utility model does not need testing circuit and control circuit, and not only structure is simple, and can carry out anti-dry protection timely and accurately, guarantees that Electrical Safety is reliable.
Further, this electric heater also comprises temperature tube 14, this temperature tube 14 is for detecting the hot water temperature in inner bag 11, and temperature information is fed back to electric-controlled plate 12, when the hot water temperature in inner bag 11 reaches preset value, electric-controlled plate 12 cuts off the current supply circuit of electric heater 13, and electric heater 13 stops heating; When the hot water temperature in inner bag 11 is lower than preset value, electric-controlled plate 12 connects the current supply circuit of electric heater 13, and electric heater 13 starts heating.Particularly, temperature tube 15 is arranged on flange 16, and between PTC heating tube 15 and electric heater 13, namely vertically electric heater 13, temperature tube 14 and PTC heating tube 15 is arranged successively from bottom to top, therefore can monitor water temperature better, cut off the current supply circuit of electric heater 13 when the abnormal rising of water temperature in time, prevent electric heater 13 from occurring the phenomenon of dry combustion method further.
In addition, this electric heater also comprises alarm module (not shown), and this alarm module is electrically connected with electric-controlled plate 12.In the present embodiment, alarm module can be voice module, also can be indicating lamp module, for warning the heated condition of user's electric heater.When the operating current of the current supply circuit at electric heater 13 place sharply reduces, electric-controlled plate 12 sends corresponding information warning to alarm module, such as voice module sounds the alarm when receiving information warning, flashing when indicating lamp module receives information warning, thus remind the water level of user's electric heater too low, likely there is the danger of dry combustion method in electric heater 13, further increases the safety in utilization of electric heater.
Below the specific constructive form of the PTC heating tube 15 of anti-dry burning device of the present utility model is elaborated:
Particularly, comprise see Fig. 3, PTC heating tube 15 metal outer pipe 151, the insulated end cover 152, first closed one end to draw rod 154, second and draw rod 155, PTC heating element heater 156 and insulated heat-conducting medium 153.Wherein, insulated heat-conducting medium 153 is dusty material, there is good insulating capacity and the capacity of heat transmission, insulated heat-conducting medium 153 is filled in metal outer pipe 151, thus make metal outer pipe 151 form solid, be conducive to the water body passed to by the heat in PTC heating tube 15 in inner bag 11, in better embodiment, insulated heat-conducting medium 153 is magnesia powder, can also be other any suitable insulating heat-conduction materials certainly; PTC heating element heater 156 adopts the material with ptc characteristics to make, and PTC heating element heater 156 is embedded in insulated heat-conducting medium 153, and arranges along the length direction of metal outer pipe 151; Insulated end cover 152 adopts the high temperature resistant and material with good insulating performance to make, insulated end cover 152 is tightly connected with the openend of metal outer pipe 151, in better embodiment, insulated end cover 152 is provided with external screw thread, metal outer pipe 151 is provided with the suitable internal thread of joining of external thread rotary of insulated end cover 152, insulated end cover 152 and metal outer pipe 151 are threaded connection to seal and fix, certainly, in other embodiments of the present utility model, can also be fixed by welded seal between insulated end cover 152 and metal outer pipe 151; First draws rod 154 and second draws rod 155 and adopts electric conductivity good material to make, such as copper material, first draw rod 154 and second draw rod 155 through insulated end cover 152 and part stretch in metal outer pipe 151, PTC heating element heater 156 draw with first respectively rod 154 and second draw rod 155 be arranged in metal outer pipe 151 parts be electrically connected, first draws rod 154 and second draws rod 155 parts be positioned at outside metal outer pipe 151 and is connected with the current supply circuit of PTC heating tube 15, and namely first draws rod 154 and draw excellent 155 via PTC heating element heater 156 and second and be electrically connected.
Again see Fig. 3, in one embodiment, PTC heating element heater 156 be bar-shaped PTC pottery, this PTC pottery be clipped in first draw rod 154 and second draw rod 155 between.It should be noted that, in order to make PTC pottery fully conductive exothermal, on the length direction of PTC pottery, PTC pottery draws rod 154 and second respectively and draws rod 155 abundant electrical contacts with first.See Fig. 5; from temperature and the resistance characteristic figure of PTC pottery; along with the rising of PTC pottery temperature; especially after temperature crosses curie point; its resistance is the increase of step evolution; it can thus be appreciated that; when water level decreasing is to position lower than PTC heating tube 15 place, PTC heating tube 15 dry combustion method, its temperature sharply rises; according to ptc characteristics; the resistance of PTC heating tube 15 also sharply increases, and therefore the electric current of the current supply circuit of PTC heating tube 15 sharply reduces, until close to zero; electric heater 13 stops heating, thus realizes anti-dry protection.Therefore, anti-dry burning device of the present utility model not only structure is simple, and can carry out anti-dry protection timely and accurately, guarantees that Electrical Safety is reliable.
Further, first draws rod 154, second draws rod 155 and PTC pottery be arranged in parallel between two, and extends to the terminal position near metal outer pipe 151.The PTC heating tube 15 of this version has better heating effect, is conducive to saving electric energy, ensures that PTC heating tube 15 reliably works simultaneously, avoids electric heater 13 to occur the phenomenon of dry combustion method.
Should be understood that; these are only preferred embodiment of the present utility model; can not therefore limit the scope of the claims of the present utility model; every utilize the utility model description and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (7)
1. an anti-dry burning device, be applicable to the anti-dry protection of electric heater, it is characterized in that, this anti-dry burning device comprises PTC heating tube, and the current supply circuit of described PTC heating tube is connected with the current supply circuit of described electric heater; Described PTC heating tube comprises metal outer pipe, insulated end cover, the PTC heating element heater, first closed one end and draws rod, second and draw rod and insulated heat-conducting medium, described insulated heat-conducting medium is filled in described metal outer pipe, described PTC heating element heater is embedded in described insulated heat-conducting medium, the openend of described insulated end cover and described metal outer pipe is tightly connected, described first draws rod and second draws rod through described insulated end cover and part stretches in described metal outer pipe, and described first draws rod draws excellent electrical connection via described PTC heating element heater and described second.
2. anti-dry burning device as claimed in claim 1, is characterized in that, described PTC heating element heater is bar-shaped PTC pottery, and described PTC pottery is clipped in described first and draws rod and described second and draw between rod.
3. anti-dry burning device as claimed in claim 1, is characterized in that, described first draws rod, second draws rod and PTC pottery be arranged in parallel between two, and extends to the terminal position near described metal outer pipe.
4. an electric heater, comprises inner bag and electric heater, and described electric heater is arranged on described inner bag by flange, it is characterized in that, this electric heater also comprises the anti-dry burning device according to any one of claims 1 to 3.
5. electric heater as claimed in claim 4, it is characterized in that, described PTC heating tube is arranged on described flange, and is positioned at the top of described electric heater.
6. electric heater as claimed in claim 4, it is characterized in that, this electric heater also comprises temperature tube, and described temperature tube is arranged on described flange, and between described PTC heating tube and described electric heater.
7. the electric heater according to any one of claim 4 to 6, is characterized in that, this electric heater also comprises electric-controlled plate and alarm module, and described alarm module is electrically connected with described electric-controlled plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420019774.4U CN204100594U (en) | 2014-01-13 | 2014-01-13 | Anti-dry burning device and electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420019774.4U CN204100594U (en) | 2014-01-13 | 2014-01-13 | Anti-dry burning device and electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204100594U true CN204100594U (en) | 2015-01-14 |
Family
ID=52269014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420019774.4U Expired - Lifetime CN204100594U (en) | 2014-01-13 | 2014-01-13 | Anti-dry burning device and electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204100594U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642720A (en) * | 2016-11-17 | 2017-05-10 | 佛山市云米电器科技有限公司 | Pre-induction type anti-dry burning structure of rapid water heating device |
| CN106949634A (en) * | 2017-04-06 | 2017-07-14 | 上海毓领温控技术有限公司 | A kind of condensation generator |
| CN112353253A (en) * | 2020-11-30 | 2021-02-12 | 苏州华爱电子有限公司 | Internal heating water dispenser hot cylinder with dry-heating preventing device |
-
2014
- 2014-01-13 CN CN201420019774.4U patent/CN204100594U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642720A (en) * | 2016-11-17 | 2017-05-10 | 佛山市云米电器科技有限公司 | Pre-induction type anti-dry burning structure of rapid water heating device |
| CN106949634A (en) * | 2017-04-06 | 2017-07-14 | 上海毓领温控技术有限公司 | A kind of condensation generator |
| CN112353253A (en) * | 2020-11-30 | 2021-02-12 | 苏州华爱电子有限公司 | Internal heating water dispenser hot cylinder with dry-heating preventing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221101 Address after: 241000 west side of 3 / F, No.5 office building, new energy and new materials gathering area, Fuzhou Road, Jiangbei District, Wuhu City, Anhui Province Patentee after: Wuhu Midea intelligent kitchen electricity Manufacturing Co.,Ltd. Address before: 241009 Wan Chun East Road, East Wuhu economic and Technological Development Zone, Wuhu, Anhui Patentee before: WUHU MIDEA KITCHEN AND BATH APPLIANCES MFG. Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150114 |