CN203734858U - Protective device of ceramic electric heater for water tank - Google Patents
Protective device of ceramic electric heater for water tank Download PDFInfo
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- CN203734858U CN203734858U CN201420128105.0U CN201420128105U CN203734858U CN 203734858 U CN203734858 U CN 203734858U CN 201420128105 U CN201420128105 U CN 201420128105U CN 203734858 U CN203734858 U CN 203734858U
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- protective device
- electric heater
- water tank
- ceramic electric
- take
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Abstract
The utility model provides a protective device of a ceramic electric heater for a water tank. The problem that a present electric heater has poor safety performance is solved. The ceramic electric heater for the water tank comprises a take-up shell. An electric heating element is inserted on the take-up shell. The electric heating element is a ceramic thermal conductor. An insertion end of the electric heating element has two contacts which are both provided with a conductor wire. The conductor wires extend out of the above take-up shell. The protective device contains temperature switches and thermal fuses. The temperature switches are connected in series on one of the conductor wires. The thermal fuses are connected in series on the other conductor wire. The protective device provided by the utility model has high safety performance, long service life and the like.
Description
Technical field
The utility model electric equipment field of mechanical technique, relates to a kind of protective device, particularly the protective device of ceramic electric heater for a kind of water tank.
Background technology
On market, widely used water tank is mainly tubular metal electric heater with electric heater now.Tubular metal electric heater is filled heat conductive insulating powder between conductor wire and metal shell, and owing to there is space between powder, its heat conductivility is limited, so the heat load that can tolerate is lower, electrothermal tube size is very large, and metal surface appearance corrosion-vulnerable, when serious, can cause Danger Electric shock risk.On market, also some electric heater plates antirust coat at metal tube surface; can stop to a certain extent corrosion, protection electrothermal tube, but because electrothermal tube is operated in the environment colding and heat succeed each other; long-term expanding with heat and contract with cold can cause coating shedding, threatens safe hidden danger therefore still exist.
Summary of the invention
The purpose of this utility model is to have the problems referred to above for existing technology, has proposed the protective device of a kind of water tank ceramic electric heater, and this protective device has the advantages that security performance is high.
The purpose of this utility model can realize by following technical proposal: the protective device of ceramic electric heater for water tank, water tank comprises take-up housing with ceramic electric heater, on described take-up housing, insert and stretch electrical heating elements, described electrical heating elements is ceramic heat conductor, in the insertion end of described electrical heating elements, there are two contacts, on described two contacts, all connect and establish conductor wire, the described conductor wire above-mentioned take-up housing that stretches through out, it is characterized in that, described protective device comprises temperature switch and Thermal Cutoffs, described temperature switch is serially connected in wherein on a conductor wire, described Thermal Cutoffs is serially connected on another one conductor wire.
The combined effect of temperature switch and Thermal Cutoffs forms overtemperature protection device, wherein when temperature switch normal temperature in conducting state, and Thermal Cutoffs is attached on the inwall of take-up housing.Ceramic heat conductor specifically adopts silicon nitride material, and its heating power is 400W～10KW.Using the quantity of the electrical heating elements of silicon nitride ceramics to be generally 1, can be also 2～4 parallel connections.The nominal escape temperature of temperature switch is 60～95 DEG C.The nominal fusing-off temperature of Thermal Cutoffs is 90～200 DEG C.Between electrical heating elements and take-up housing, by sealing ring and refractory seals glue sealing and fixing, also can only use wherein a kind of mode seal and fix, wherein sealing ring is compressed by stator.
In described take-up housing, also lay a conductor wire, one end of this conductor wire is positioned on the inwall of take-up housing, the other end take-up housing that stretches through out.
Described electrical heating elements is slice shape, and the thickness of slice shape is 2.5 to 5.5mm.
Described electrical heating elements is cylindrical shape, and the diameter of cylindrical shape is less than or equal to 10mm.
Described electrical heating elements is oval column, and the major axis of oval column is less than or equal to 10mm.
Described take-up housing comprises the enclosed seat and the bonnet that are interlocked, and the top of described enclosed seat is offered to insert and stretched mouth, and line outlet is offered in the bottom of described bonnet.The material of making enclosed seat is the combination that one or more materials in following material are made parts: the metals such as copper, stainless steel, aluminium, titanium and the alloy that contains these metals, nylon, pottery and other resistant to elevated temperatures materials.The slotting mouth of stretching at enclosed seat top is for installing and fixing electrical heating elements.The line outlet of bonnet bottom is for passing through conductor wire boundling.
On the line outlet of described bonnet bottom, install sealing cap, sealing ring and/or refractory seals glue are established in filling out in interior week of described sealing cap.Compressed by stator for the sealing ring sealing.Sealing cap can be realized the effect of fastening conductor wire boundling simultaneously.
On the inwall of described enclosed seat, be arranged with holding tank, described temperature switch is embedded in holding tank, and fills heat-conducting glue or thermal grease conduction between temperature switch and holding tank.Temperature switch is close to the inner surface of enclosed seat, carries out space filling by heat-conducting glue or thermal grease conduction, and temperature switch can have auxiliary stator to fix.The end face of enclosed seat can arrange through hole, and it is for the blind pipe of laying temperature switch is installed, and temperature switch is specifically placed in the blind pipe stretching in heated liquid, and Thermal Cutoffs is also placed in the blind pipe stretching in heated liquid.
The interface of described enclosed seat arranges snap ring, and the interface of described bonnet arranges draw-in groove, and described snap ring forms buckle with draw-in groove and is connected.This kind of snap-fitted belongs to plug type enclosed seat, and the profile of plug type enclosed seat is divided into plug portion and standing part.Wherein plug portion is filled in water tank, and the degree of depth that standing part control stopper is filled in.The external diameter of plug portion is generally 47mm or 58mm, but is not limited to this two kinds of sizes.The length of plug portion, also can be according to the size customization of sealing ring and water tank conventionally between 10mm～30mm, if can be firm fixing.The outer wall of plug portion can be smooth surface, can be also rough surface, or has the project organization of certain groove or fin, makes thus to install more firm.
On the interface outer wall of described enclosed seat, merit is established external screw thread, and on the interface inwall of described bonnet, merit is established internal thread, and enclosed seat forms and is threaded with bonnet.This kind of Screw assembly belongs to flange-type enclosed seat, and with the flange-type enclosed seat of gas thread, its gas thread specification comprises 3/4 cun, and 1 cun, 1.5 cun and 2 cun can be also made in U.S.A, made in Germany or other specification screw threads.
Compared with prior art, this water tank adopts the ceramic electrothermal element of silicon nitride as heater block with ceramic electric heater, in conjunction with temperature switch and Thermal Cutoffs, improves security performance, be encapsulated in easy-to-install stopper or the flange with gas thread, can facilitate and firmly be arranged on water tank.And the silicon nitride heat shock resistance of high compact high-strength degree is functional, and during for heating water, the power density of electric heating element can reach 70W/cm
2.Therefore adopt the electric heater of silicon-nitride electric heating element to have safe and reliable, the heat efficiency is high, even water temperature, the feature such as volume is little, corrosion-resistant, and the life-span is long.
Brief description of the drawings
Fig. 1 is the cross-sectional view of embodiment mono-of the present utility model.
Fig. 2 is the cross-sectional view of embodiment bis-of the present utility model.
In figure, 1, electrical heating elements; 2, temperature switch; 3, Thermal Cutoffs; 4, enclosed seat; 5, bonnet; 6, sealing cap.
Embodiment
Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
Embodiment mono-
As shown in Figure 1, this water tank comprises take-up housing with ceramic electric heater, on take-up housing, inserts and stretches electrical heating elements 1, and this electrical heating elements 1 is ceramic heat conductor, and ceramic heat conductor specifically adopts silicon nitride material, and its heating power is 1000W～10KW.Using the quantity of the electrical heating elements 1 of silicon nitride ceramics to be generally 1, can be also 2～4 parallel connections.
The electrical heating elements 1 of the silicon nitride ceramics adopting is that conductor wire is encapsulated in fine and close silicon nitride ceramics, and silicon nitride ceramics is as heat-conducting layer, also as insulating barrier.Because insulation property and the heat conductivility of silicon nitride ceramics are good, and self can resist the corrosion of acid-base solution.
Electrical heating elements 1 specifically can adopt three kinds of forms, and first electrical heating elements 1 is slice shape, and the thickness of slice shape is 2.5 to 5.5mm; It two is that electrical heating elements 1 is cylindrical shape, and the diameter of cylindrical shape is less than or equal to 10mm; It three is that electrical heating elements 1 is oval column, and the major axis of oval column is less than or equal to 10mm.
Take-up housing comprises the enclosed seat 4 and bonnet 5 that are interlocked, the material of making enclosed seat 4 is the combination that one or more materials in following material are made parts: the metals such as copper, stainless steel, aluminium, titanium and the alloy that contains these metals, nylon, pottery and other resistant to elevated temperatures materials.
The top of enclosed seat 4 is offered to insert and is stretched mouth, and this is inserted and stretches mouth for installing and fixing electrical heating elements 1.Electrical heating elements 1 and enclosed seat 4 slotting stretches between mouth by sealing ring and refractory seals glue sealing and fixing, also can only use wherein a kind of mode seal and fix, and wherein sealing ring is compressed by stator.In the insertion end of electrical heating elements 1, there are two contacts, on each contact, connect and establish conductor wire, and be connected in series temperature switch 2 on a conductor wire, on another root conductor wire, be connected in series Thermal Cutoffs 3.In take-up housing, also lay a conductor wire, one end of this conductor wire is positioned on the inwall of take-up housing, the other end take-up housing that stretches through out.Line outlet is offered in the bottom of bonnet 5, and it is for passing through conductor wire boundling.On the line outlet of bonnet 5 bottoms, install sealing cap 6, sealing ring and/or refractory seals glue are established in filling out in interior week of sealing cap 6.Compressed by stator for the sealing ring sealing.Sealing cap 6 can be realized the effect of fastening conductor wire boundling simultaneously.
On the inwall of enclosed seat 4, be arranged with holding tank, temperature switch 2 is embedded in holding tank, and fills heat-conducting glue or thermal grease conduction between temperature switch 2 and holding tank.Temperature switch 2 is close to the inner surface of enclosed seat 4, carries out space filling by heat-conducting glue or thermal grease conduction, and temperature switch 2 can have auxiliary stator to fix.The end face of enclosed seat 4 can arrange through hole, and it is for the blind pipe of laying temperature switch 2 is installed, and temperature switch 2 is specifically placed in the blind pipe stretching in heated liquid, and Thermal Cutoffs 3 is also placed in the blind pipe stretching in heated liquid.
Temperature switch 2 forms overtemperature protection device with the combined effect of Thermal Cutoffs 3, wherein when temperature switch 2 normal temperature in conducting state, and Thermal Cutoffs 3 is attached on the inwall of take-up housing.The nominal escape temperature of temperature switch 2 is 60～95 DEG C.The nominal fusing-off temperature of Thermal Cutoffs 3 is 90～200 DEG C.Temperature switch 2 and Thermal Cutoffs 3 are all to adopt the existing product that can buy on market, and its structure is not described in detail.
The interface of enclosed seat 4 arranges snap ring, and the interface of bonnet 5 arranges draw-in groove, and snap ring is connected with draw-in groove formation buckle.This kind of snap-fitted belongs to plug type enclosed seat 4, and the profile of plug type enclosed seat 4 is divided into plug portion and standing part.Wherein plug portion is filled in water tank, and the degree of depth that standing part control stopper is filled in.The external diameter of plug portion is generally 47mm or 58mm, but is not limited to this two kinds of sizes.The length of plug portion, also can be according to the size customization of sealing ring and water tank conventionally between 10mm～30mm, if can be firm fixing.The outer wall of plug portion can be smooth surface, can be also rough surface, or has the project organization of certain groove or fin, makes thus to install more firm.
Embodiment bis-
As shown in Figure 2, the present embodiment is basic identical with structure and the principle of embodiment mono-, and different place is:
On the interface outer wall of enclosed seat 4, merit is established external screw thread, and on the interface inwall of bonnet 5, merit is established internal thread, and enclosed seat 4 forms and is threaded with bonnet 5.This kind of Screw assembly belongs to flange-type enclosed seat 4, and with the flange-type enclosed seat 4 of gas thread, its gas thread specification comprises 3/4 cun, and 1 cun, 1.5 cun and 2 cun can be also other made in U.S.A, made in Germany or other specification screw threads.
This water tank adopts the ceramic electrothermal element of silicon nitride as heater block with ceramic electric heater, in conjunction with overtemperature protection device, is encapsulated in easy-to-install stopper or the flange with gas thread, can facilitate and firmly be arranged on water tank.And the silicon nitride heat shock resistance of high compact high-strength degree is functional, and during for heating water, the power density of electric heating element can reach 70W/cm
2.Therefore adopt the electric heater of silicon-nitride electric heating element to have safe and reliable, the heat efficiency is high, even water temperature, and the feature such as volume is little, corrosion-resistant, and the life-span is long, is the preferred heating source of safety and energy-saving hot water solution of new generation.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendments or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although more used electrical heating elements 1 herein; Temperature switch 2; Thermal Cutoffs 3; Enclosed seat 4; Bonnet 5; Sealing cap 6 terms such as grade, but do not get rid of the possibility that uses other term.Use these terms to be only used to describe more easily and explain essence of the present utility model; They are construed to any additional restriction is all contrary with the utility model spirit.
Claims (10)
1. the protective device of ceramic electric heater for water tank, water tank comprises take-up housing with the protective device of ceramic electric heater, on described take-up housing, insert and stretch electrical heating elements, described electrical heating elements is ceramic heat conductor, in the insertion end of described electrical heating elements, there are two contacts, on described two contacts, all connect and establish conductor wire, the described conductor wire above-mentioned take-up housing that stretches through out, it is characterized in that, described protective device comprises temperature switch and Thermal Cutoffs, described temperature switch is serially connected in wherein on a conductor wire, described Thermal Cutoffs is serially connected on another one conductor wire.
2. the protective device of ceramic electric heater for water tank according to claim 1, is characterized in that, in described take-up housing, also lay a conductor wire, one end of this conductor wire is positioned on the inwall of take-up housing, the other end take-up housing that stretches through out.
3. the protective device of ceramic electric heater for water tank according to claim 1, is characterized in that, described electrical heating elements is slice shape, and the thickness of slice shape is 2.5 to 5.5mm.
4. the protective device of ceramic electric heater for water tank according to claim 1, is characterized in that, described electrical heating elements is cylindrical shape, and the diameter of cylindrical shape is less than or equal to 10mm.
5. the protective device of ceramic electric heater for water tank according to claim 1, is characterized in that, described electrical heating elements is oval column, and the major axis of oval column is less than or equal to 10mm.
6. the protective device with ceramic electric heater according to the water tank described in any one in claim 1 to 5; it is characterized in that; described take-up housing comprises the enclosed seat and the bonnet that are interlocked, and the top of described enclosed seat is offered to insert and stretched mouth, and line outlet is offered in the bottom of described bonnet.
7. the protective device of ceramic electric heater for water tank according to claim 6, is characterized in that, on the line outlet of described bonnet bottom, installs sealing cap, and sealing ring and/or refractory seals glue are established in filling out in interior week of described sealing cap.
8. the protective device of ceramic electric heater for water tank according to claim 6; it is characterized in that; on the inwall of described enclosed seat, be arranged with holding tank, described temperature switch is embedded in holding tank, and fills heat-conducting glue or thermal grease conduction between temperature switch and holding tank.
9. the protective device of ceramic electric heater for water tank according to claim 6, is characterized in that, the interface of described enclosed seat arranges snap ring, and the interface of described bonnet arranges draw-in groove, and described snap ring forms buckle with draw-in groove and is connected.
10. the protective device with ceramic electric heater according to the water tank described in any one in claim 6; it is characterized in that; on the interface outer wall of described enclosed seat, merit is established external screw thread, and on the interface inwall of described bonnet, merit is established internal thread, and enclosed seat forms and is threaded with bonnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128105.0U CN203734858U (en) | 2014-03-20 | 2014-03-20 | Protective device of ceramic electric heater for water tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128105.0U CN203734858U (en) | 2014-03-20 | 2014-03-20 | Protective device of ceramic electric heater for water tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203734858U true CN203734858U (en) | 2014-07-23 |
Family
ID=51204896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420128105.0U Expired - Fee Related CN203734858U (en) | 2014-03-20 | 2014-03-20 | Protective device of ceramic electric heater for water tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203734858U (en) |
-
2014
- 2014-03-20 CN CN201420128105.0U patent/CN203734858U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20160320 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |