CN202619961U - Hand-warming device with double anti-explosion protection switches - Google Patents
Hand-warming device with double anti-explosion protection switches Download PDFInfo
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- CN202619961U CN202619961U CN 201220145211 CN201220145211U CN202619961U CN 202619961 U CN202619961 U CN 202619961U CN 201220145211 CN201220145211 CN 201220145211 CN 201220145211 U CN201220145211 U CN 201220145211U CN 202619961 U CN202619961 U CN 202619961U
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Abstract
The utility model discloses a hand-warming device with double anti-explosion protection switches. The hand-warming device with the double anti-explosion protection switches comprises a bag body and an electric heating device which is installed inside the bag body. The hand-warming device with the double anti-explosion protection switches is characterized in that a pressure anti-explosion switch and a magnetic control anti-explosion switch are further arranged inside the bag body and are connected in series; the pressure anti-explosion switch and the magnetic control anti-explosion switch are in electric connection with the electric heating device. Due to the fact that the pressure anti-explosion switch and the magnetic control anti-explosion switch are both installed inside the bag body, the double anti-explosion protection function can be achieved so that though one anti-explosion switch is broken or does not work, the other anti-explosion switch can still play the role of anti-explosion protection, and therefore safety and overall service life of the hand-warming device can be improved and prolonged. The hand-warming device is simple and reasonable in structure.
Description
Technical field
This utility model relates to the hand warmer technical field, especially a kind of safety hand warmer with dual explosive-proof protector switch.
Background technology
Hand warmer claims again " electric warming bag " that its structure comprises bag, is provided with electric heater unit in the bag, and electric heater unit is electrically connected with outside alternating current power supply (big electric current); Yet, for preventing electric warming bag in heating process, blasting phenomena takes place, generally a pressure flame-proof switch can be installed in electric warming bag; See Chinese utility model patent number: 200520121073.2, name is called: explosion-proof electric warming bag; This electric warming bag through on the intravital side surface of bag, having cavity, is provided with pressure switch in the cavity, pressure switch is made up of contact switch and elastic shell thereof, and contact switch and electric heater unit are connected in series; During the bag heating,, make the elastic shell distortion and promote contact switch, thereby cut off the electric heater unit power supply, realize explosion-proof effect along with (air pressure) pressure in the bag constantly increases.
But, above-mentioned hot-water bag with a flame-proof switch, they all are direct and electric heater unit is connected in series, and electrically connect with external ac power source (forceful electric power); Yet still there is following weak point in the hot-water bag of said structure: (1) only is provided with single flame-proof switch in view of this hot-water bag; If flame-proof switch runs into damage, or, cause the flame-proof switch akinesia to break off because of special circumstances; Cause explosion easily, therefore, have bigger potential safety hazard; And hand warmer only is provided with single flame-proof switch, and damaged by flame-proof switch influences, and causes the service life of hand warmer shorter.
The utility model content
The purpose of this utility model is to overcome the deficiency of above-mentioned prior art existence, and provides a kind of simple and reasonable for structure, through dual explosive-proof protector switch is set, has both improved the safety that product uses, and prolongs the product hand warmer in service life again.
The purpose of this utility model is to realize like this.
Hand warmer with dual explosive-proof protector switch; Comprise bag and electric heater unit; Electric heater unit is arranged in the bag; It is characterized in that, also be provided with pressure flame-proof switch and magnetic control flame-proof switch on the said bag, pressure flame-proof switch and magnetic control flame-proof switch are cascaded each other and electrically connect with electric heater unit; This kind of hand warmer; Through pressure flame-proof switch and magnetic control flame-proof switch are set in bag simultaneously; Realize the effect of the dual explosive-proof protector of hand warmer, even one of them flame-proof switch damages or akinesia, another flame-proof switch still can play the effect of explosive-proof protector; This had both improved the safety in utilization of product, had prolonged the whole service life of product again; And it is simple and reasonable for structure.
This utility model can also adopt following technical measures to solve.
As better scheme, said pressure flame-proof switch is the electric switch that is connected alternating current with the magnetic control flame-proof switch.
The pressure flame-proof switch of above-mentioned connection alternating current and magnetic control flame-proof switch; Can cooperate controllable silicon to use; Controllable silicon is provided with two anodes and the control utmost point; Electric heater unit connects one of them anode, and another anode is in series with pressure flame-proof switch and magnetic control flame-proof switch as power connector end between the control utmost point and one of them anode; During work, the SCR control utmost point is applied certain control voltage (little electric current), (that is: two anode between) will conducting and through big electric current (more than the 5A) between two anodes of silicon controlled, the principle of Here it is the big electric current of little Current Control; After the controllable silicon conducting, electric heater unit work heating; When any one pressure flame-proof switch or magnetic control flame-proof switch in the SCR control utmost point loop are opened a way; The SCR control utmost point is not controlled voltage because of the open circuit of pressure flame-proof switch or magnetic control flame-proof switch; Just can conducting between two anodes of controllable silicon, electric heater unit just can not worked.
Said pressure flame-proof switch also can be to be connected galvanic electric switch with the magnetic control flame-proof switch.
Galvanic pressure flame-proof switch of above-mentioned connection and magnetic control flame-proof switch; Can cooperate IGBT (that is: insulated gate bipolar transistor) to use; IGBT is provided with colelctor electrode, emitter stage and the control utmost point; Electric heater unit connects colelctor electrode, and emitter stage is in series with pressure flame-proof switch and magnetic control flame-proof switch as power connector end between the control utmost point and the colelctor electrode; When the IGBT control utmost point applies certain control voltage (little electric current), will conducting between the collector and emitter of IGBT and through big electric current (more than the 5A), the principle of Here it is the big electric current of little Current Control; After the IGBT conducting, electric heater unit work heating; When any one pressure flame-proof switch or magnetic control flame-proof switch are opened a way in the IGBT control utmost point loop; The IGBT control utmost point is not controlled voltage because of the open circuit of pressure flame-proof switch or magnetic control flame-proof switch; Just can conducting between the emitter and collector of IGBT, electric heater unit just can not worked.
During above-mentioned use IGBT, can set up rectification circuit, the power input of rectification circuit is connected with alternating current, and its power output end is divided into direct-flow positive pole and direct current negative pole, and direct-flow positive pole connects electric heater unit, and the direct current negative pole connects emitter stage; Like this, electric heater unit, pressure flame-proof switch, magnetic control flame-proof switch and IGBT all can use and be fit to the components and parts that unidirectional current uses, and therefore, are selecting on the components and parts, and its cost is lower, and the life-span, relative (interchange components and parts) were longer.
As more perfect scheme, it also includes dry burning resistance switch, and dry burning resistance switch and electric heater unit are connected in series; When electric heater unit was in dry combustion method, dry burning resistance switch felt to answer temperature to reach setting value, can break off the electric heater unit power supply, realized the effect of anti-dry.
Said pressure flame-proof switch is made up of contact switch and elastic shell thereof, has through hole on the side surface of bag, is connected with elastic shell on the through hole, and contact switch places the elastic shell outer surface, and contact switch and electric heater unit are connected in series.
Said magnetic control flame-proof switch is made up of magnetic switch and magnetic; Magnetic switch is arranged on bag one side and is electrically connected with electric heater unit; Magnetic is arranged on the bag inner chamber, and links to each other with the bag inwall through coupling assembling, so that magnetic switch receives the magnetic effect and realizes being communicated with or cut-out during the bag expanded by heating.
The beneficial effect of this utility model is.
(1) hand warmer of this utility model; Through pressure flame-proof switch and magnetic control flame-proof switch are set in bag simultaneously; Realize the effect of the dual explosive-proof protector of hand warmer, even one of them flame-proof switch damages or akinesia, another flame-proof switch still can play the effect of explosive-proof protector; This had both improved the safety in utilization of product, had prolonged the whole service life of product again; And it is simple and reasonable for structure.
(2) have again, in view of pressure flame-proof switch and magnetic control flame-proof switch can adopt alternating current, also can adopt the corresponding components and parts of powered by direct current; Such as: when using alternating current, can adopt existing traditional pressure switch and flame-proof switch (big current elements device), directly connect the electrical heating assembling device, be electrically connected use with the city; Or being used controllable silicon, pressure switch and flame-proof switch are selected little current elements device for use, utilize the silicon controlled control utmost point, realize the principle of the big electric current of little Current Control; Again such as, when using unidirectional current, be used IGBT, pressure switch and flame-proof switch are selected little current elements device for use, utilize the control utmost point of IGBT, realize the principle of the big electric current of little Current Control; Therefore; The hand warmer of this dual explosive-proof protector; Selecting for use of pressure flame-proof switch and magnetic control flame-proof switch; More extensive, especially be fit to the location of different manufacturers in response to product, select for use suitable big current elements device or little current elements device as pressure flame-proof switch and magnetic control flame-proof switch
.
Description of drawings
Fig. 1 is the hand warmer sketch map of the dual explosive-proof protector switch of this utility model band.
Fig. 2 is the hand warmer circuit theory diagrams of Fig. 1.
Fig. 3 is another embodiment circuit theory diagrams of hand warmer of Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing utility model is done further to detail.
As depicted in figs. 1 and 2; A kind of hand warmer with dual explosive-proof protector switch; Comprise bag 1 and electric heater unit 2, electric heater unit 2 is arranged in the bag 1, it is characterized in that; Also be provided with pressure flame-proof switch 3 and magnetic control flame-proof switch 4 on the said bag 1, pressure flame-proof switch 3 is cascaded each other with magnetic control flame-proof switch 4 and electrically connects with electric heater unit 2.
Above-mentioned pressure flame-proof switch 3 is the electric switches that are connected alternating current with magnetic control flame-proof switch 4; Below illustrate.
The pressure flame-proof switch 3 and the magnetic control flame-proof switch 4 of above-mentioned connection alternating current; Can cooperate controllable silicon T to use; Controllable silicon T is provided with two anode T1, T2 and control utmost point G; Electric heater unit 2 connects one of them anode T1, and another anode T2 is in series with pressure flame-proof switch 3 and magnetic control flame-proof switch 4 as power connector end between control utmost point G and one of them the anode T1.For preventing electric heater unit 2 dry combustion methods, it also includes dry burning resistance switch 5, and dry burning resistance switch 5 is connected in series with electric heater unit 2.Selecting for use of this pressure flame-proof switch 3 and magnetic control flame-proof switch 4, being equivalent to is the switch of little current elements device.
Operation principle: hot-water bag is connected external power source; Silicon controlled control utmost point G applies certain control voltage (little electric current); Make between two anode T1, the T2 conducting and through big electric current (more than the 5A), the principle of Here it is the big electric current of little Current Control is after the controllable silicon conducting; Will apply 220V voltage at electric heater unit 2 two ends, electric heater unit 2 work heatings; When any one pressure flame-proof switch 3 in the SCR control utmost point loop or magnetic control flame-proof switch 4 open circuits; SCR control utmost point G does not control voltage because of pressure flame-proof switch 3 or magnetic control flame-proof switch 4 open circuits; Two anode T1 of controllable silicon, T2 just can conductings, and electric heater unit 2 just can not worked.
In addition; The pressure flame-proof switch 3 and the magnetic control flame-proof switch 4 of above-mentioned little electric current can be replaced by traditional big electric current pressure switch and big electric current magnetic switch, promptly; Be equivalent to background technology; Which kind of high-current switch of mentioning, they directly connect the electrical heating assembling device, are electrically connected use with the city, no longer launch here to detail.
Certainly, said pressure flame-proof switch 3 also can be to be connected galvanic electric switch with magnetic control flame-proof switch 4; Concrete scheme is following.
As shown in Figure 3; Galvanic pressure flame-proof switch 3 of above-mentioned connection and magnetic control flame-proof switch 4; Can cooperate IGBT to use, IGBT is provided with colelctor electrode, emitter stage T1, T2 and control utmost point G, and electric heater unit 2 connects colelctor electrode T1; Emitter stage T2 is in series with pressure flame-proof switch 3 and magnetic control flame-proof switch 4 as power connector end between control utmost point G and the colelctor electrode T1.
It also comprises rectification circuit D4, D5, D6, D7, and the power input of rectification circuit D4, D5, D6, D7 is connected with alternating current, and its power output end is divided into direct-flow positive pole and direct current negative pole, and direct-flow positive pole connects electric heater unit 2, and the direct current negative pole connects emitter stage T2.
This operation principle, close with above-mentioned silicon controlled, no longer detail here.
In the above-mentioned embodiment; Said pressure flame-proof switch 3 is made up of contact switch 31 and elastic shell 32 thereof, has through hole on the side surface of bag 1, is connected with elastic shell 32 on the through hole; Contact switch 31 places elastic shell 32 outer surfaces, and contact switch 31 is connected in series with electric heater unit 2.
Said magnetic control flame-proof switch 4 is made up of magnetic switch 41 and magnetic 42; Magnetic switch 41 is arranged on bag 1 one sides and is electrically connected with electric heater unit 2; Magnetic 42 is arranged on bag 1 inner chamber, and links to each other with bag 1 inwall through coupling assembling, so that magnetic switch 41 receives magnetic 42 effects and realizes being communicated with or cut-out during bag 1 expanded by heating.
LED is a light emitting diode among said Fig. 2 and Fig. 3, and F1 is a fuse, and R1 and R2 are resistance.
Claims (9)
1. with the hand warmer of dual explosive-proof protector switch; Comprise bag (1) and electric heater unit (2); Electric heater unit (2) is arranged in the bag (1); It is characterized in that, also be provided with pressure flame-proof switch (3) and magnetic control flame-proof switch (4) on the said bag (1), pressure flame-proof switch (3) and magnetic control flame-proof switch (4) are cascaded each other and electrically connect with electric heater unit (2).
2. according to the said hand warmer of claim 1, it is characterized in that said pressure flame-proof switch (3) is the electric switch that is connected alternating current with magnetic control flame-proof switch (4) with dual explosive-proof protector switch.
3. according to the said hand warmer of claim 2 with dual explosive-proof protector switch; It is characterized in that; Also include controllable silicon (T), controllable silicon (T) is provided with two anodes (T1, T2) and the control utmost point (G), and electric heater unit (2) connects one of them anode (T1); Another anode (T2) is in series with pressure flame-proof switch (3) and magnetic control flame-proof switch (4) as power connector end between the control utmost point (G) and one of them anode (T1).
4. according to the said hand warmer of claim 1, it is characterized in that said pressure flame-proof switch (3) is to be connected galvanic electric switch with magnetic control flame-proof switch (4) with dual explosive-proof protector switch.
5. according to the said hand warmer of claim 1 with dual explosive-proof protector switch; It is characterized in that; Also include IGBT (T), IGBT (T) is provided with colelctor electrode, emitter stage (T1, T2) and the control utmost point (G), and electric heater unit (2) connects colelctor electrode (T1); Emitter stage (T2) is in series with pressure flame-proof switch (3) and magnetic control flame-proof switch (4) as power connector end between the control utmost point (G) and the colelctor electrode (T1).
6. according to the said hand warmer of claim 5 with dual explosive-proof protector switch; It is characterized in that; Also comprise rectification circuit (D4, D5, D6, D7), the power input of rectification circuit (D4, D5, D6, D7) is connected with alternating current, and its power output end is divided into direct-flow positive pole and direct current negative pole; Direct-flow positive pole connects electric heater unit (2), and the direct current negative pole connects emitter stage (T2).
7. according to claim 3 or 5 said hand warmers with dual explosive-proof protector switch, it is characterized in that, also include dry burning resistance switch (5), dry burning resistance switch (5) is connected in series with electric heater unit (2).
8. according to claim 2 or 5 said hand warmers with dual explosive-proof protector switch; It is characterized in that; Said pressure flame-proof switch (3) is made up of contact switch (1) and elastic shell (32) thereof, has through hole on the side surface of bag (1), is connected with elastic shell (32) on the through hole; Contact switch (31) places elastic shell (32) outer surface, and contact switch (31) is connected in series with electric heater unit (2).
9. according to claim 3 or 5 said hand warmers with dual explosive-proof protector switch; It is characterized in that; Said magnetic control flame-proof switch (4) is made up of magnetic switch (41) and magnetic (42); Magnetic switch (41) is arranged on bag (1) one side and is electrically connected with electric heater unit (2); Magnetic (42) is arranged on bag (1) inner chamber, and links to each other with bag (1) inwall through coupling assembling, so that magnetic switch (41) receives magnetic (42) effect and realizes connection or cut-out during bag (1) expanded by heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220145211 CN202619961U (en) | 2012-04-09 | 2012-04-09 | Hand-warming device with double anti-explosion protection switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220145211 CN202619961U (en) | 2012-04-09 | 2012-04-09 | Hand-warming device with double anti-explosion protection switches |
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| Publication Number | Publication Date |
|---|---|
| CN202619961U true CN202619961U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220145211 Expired - Fee Related CN202619961U (en) | 2012-04-09 | 2012-04-09 | Hand-warming device with double anti-explosion protection switches |
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| CN (1) | CN202619961U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191996A (en) * | 2017-06-21 | 2017-09-22 | 佛山市顺德区米创智能科技有限公司 | A kind of new type of safe warmer |
-
2012
- 2012-04-09 CN CN 201220145211 patent/CN202619961U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191996A (en) * | 2017-06-21 | 2017-09-22 | 佛山市顺德区米创智能科技有限公司 | A kind of new type of safe warmer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 528300 Guangdong Province, Shunde District Leliu Jiang Village Industrial Avenue, West Road, three Patentee after: Guangdong U.S. Megtron new appliance Co., Ltd Address before: 528300 Guangdong Province, Shunde District Leliu Jiang Village Industrial Avenue, West Road, three Patentee before: Foshan Shunde District Meimei Innovation Electrical Appliance Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20180409 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |