CN2829268Y - Automatic power-off thermal insulation device or electric heater of themos bottle - Google Patents
Automatic power-off thermal insulation device or electric heater of themos bottle Download PDFInfo
- Publication number
- CN2829268Y CN2829268Y CN 200520014133 CN200520014133U CN2829268Y CN 2829268 Y CN2829268 Y CN 2829268Y CN 200520014133 CN200520014133 CN 200520014133 CN 200520014133 U CN200520014133 U CN 200520014133U CN 2829268 Y CN2829268 Y CN 2829268Y
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- CN
- China
- Prior art keywords
- bottle
- electric heater
- switch
- vent hole
- sheet
- Prior art date
- 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 - Fee Related
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Abstract
The utility model relates to an automatic power-off thermal insulation device for a vacuum bottle electric heater, which comprises a bottle cork and a heating element fixed in the bottle cork, wherein a first vent hole and a second vent hole are formed on the bottle cork, wherein an air pressure valve ball is arranged in the second vent hole. A part of the wall of the second vent hole is a copper sheet with good heat conductivity, and a bimetallic sheet is arranged outside the copper sheet. One end of a push rod which can move up and down is opposite to the bimetallic sheet, and the other end is opposite to the movable contact sheet of a power switch. When the bimetallic sheet is heated to deform and push the push rod to move upward, the switch can act. The utility model has the advantages of flexible action and high safety and reliability, and can prevent various dangers caused by switch failure.
Description
Technical field
The utility model relates to a kind of parts of electric calorifie installation, especially is exclusively used in the recloser of firing equipment.
Background technology
The thermos electric heater is commonly called as immersion heater, is subjected to user's welcome owing to it is easy to use.Simultaneously safer, convenient in order to make it to use, people to its structure also among updating.Disclosed a kind of " heater automatically cuts off the power supply " as Chinese patent 932270131, it forms integrative-structure by bottle stopper, electric heating tube and control circuit.Be characterized in the bottle stopper inner chamber air bag being arranged, finish automatic power-off protection by air bag controlled deduction formula power knob switch.When water was boiled, air bag expanded, and promoted to move on the power knob switch.This moment, circuit was off state, and promptly water is opened automatic outage.Promote the structure of power knob switch owing to adopt air bag to expand, therefore air bag is fragile, aging on the one hand, thereby causes malfunctioning switch to influence safety, and is moving with the push rod contact site if air bag has expansion on the other hand, when perhaps the push rod resistance increases, also can cause malfunctioning switch to influence safety.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of improved thermos electric heater automatic power-off protection device at above-mentioned prior art present situation, and it can prevent the malfunctioning switch phenomenon effectively.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this device comprises bottle stopper, is fixed on the heater element in the bottle stopper, and on bottle stopper, have first steam vent and second steam vent, the air pressure valve ball wherein is installed in second steam vent, the part of the second exhaust hole wall is the good copper sheet of heat conduction, the copper sheet outside is equipped with bimetal leaf, push rod one end moving up and down is relative with bimetal leaf, and the other end is relative with the mains switch movable contact spring.Thereby bimetal leaf is subjected to thermal deformation to promote to move on the push rod and makes switch motion.
Compared with prior art, advantage of the present utility model is: owing to adopt two steam vents and air pressure valve ball and bimetal leaf structure, so switch motion is very sensitive, and whole device is safe and reliable, has stopped the dangerous situation that causes owing to malfunctioning switch substantially.Even just in case switch does not move, a large amount of steams also can be discharged by two steam vents, can not blast.Simultaneously, because the time-lag action that the air pressure valve ball is played also can seethe with excitement the water of thermos bottom.And after the bimetallic cooling, mains switch connects once more, thereby reaches heat insulation effect.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, this device comprises bottle stopper 3 and is fixed on heating element 10 on the bottle stopper, has first steam vent 8 and second steam vent 7 on the bottle stopper.When heater element is heated to uniform temperature with the water in the bottle, just has steam and produce.And the existence of first steam vent can be discharged the part steam, thereby makes the unlikely very fast rising of pressure of the inside of a bottle play safe effect.Air pressure valve ball 9 is housed in second steam vent, and the part of hole wall is the good copper sheet of heat conduction 12.The most handy sealing ring 5 sealings in copper sheet and hole wall contact site are in case vapour leakage is to electric component.The copper sheet outside is equipped with bimetal leaf 6.Push rod 4 is installed on the bottle stopper by push rod support 11, and can move up and down.Simultaneously, push rod one end is relative with bimetal leaf, and the other end is relative with mains switch movable contact spring 2.The bottle inner vapor is not before reaching certain air pressure, because the resistance that the air pressure valve ball arranged is when not entering second steam vent.When producing a large amount of steams in the bottle, air pressure raises, the first steam vent discharge capacity deficiency, and the air pressure valve ball will be backed down.The heat steam that reaches 100 ℃ just enters second steam vent, and rushes at copper sheet.With the heat transferred bimetal leaf, make it temperature distortion by copper sheet, switch is disconnected thereby promote push rod.
Bimetal leaf is preferably butterfly, and its operating temperature is 88 ℃～92 ℃, and recovery temperature is 65 ℃ ± 5 ℃.In the serial connection loop that heating element, switch and power supply constitute, preferably connect an indicator light 1 simultaneously.Promote push rod when the bimetal leaf expanded by heating, when movable contact spring in the switch is separated with static contact, dump, indicator light goes out.The butterfly bimetal leaf restores to the original state when the water in bottle temperature drop is low, switch connection then, and indicator light is bright.Heating element is switched on once more to heating and is played insulation effect.
Claims (2)
1, a kind of thermos electric heater attemperator that cuts off the power supply automatically comprises bottle stopper (3), is fixed on the heater element (10) in the bottle stopper, it is characterized in that: have first steam vent (8) and second steam vent (7) on the bottle stopper (3); Air pressure valve ball (9) is installed in second steam vent, the part of its hole wall is heat conduction copper sheet (12), the copper sheet outside is equipped with bimetal leaf (6), and the push rod same bimetal leafs of (4) one ends moving up and down (6) are relative, and the other end is relative with switch movable contact spring (2).
2, the thermos electric heater as claimed in claim 1 attemperator that cuts off the power supply automatically is characterized in that bimetal leaf (6) is butterfly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520014133 CN2829268Y (en) | 2005-08-17 | 2005-08-17 | Automatic power-off thermal insulation device or electric heater of themos bottle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520014133 CN2829268Y (en) | 2005-08-17 | 2005-08-17 | Automatic power-off thermal insulation device or electric heater of themos bottle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2829268Y true CN2829268Y (en) | 2006-10-18 |
Family
ID=37080818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520014133 Expired - Fee Related CN2829268Y (en) | 2005-08-17 | 2005-08-17 | Automatic power-off thermal insulation device or electric heater of themos bottle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2829268Y (en) |
-
2005
- 2005-08-17 CN CN 200520014133 patent/CN2829268Y/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061018 Termination date: 20130817 |