CN201670991U - Thermal protection control circuit of dry electric iron - Google Patents
Thermal protection control circuit of dry electric iron Download PDFInfo
- Publication number
- CN201670991U CN201670991U CN2010202181386U CN201020218138U CN201670991U CN 201670991 U CN201670991 U CN 201670991U CN 2010202181386 U CN2010202181386 U CN 2010202181386U CN 201020218138 U CN201020218138 U CN 201020218138U CN 201670991 U CN201670991 U CN 201670991U
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- electric iron
- base plate
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Abstract
The utility model discloses a thermal protection control circuit of a dry electric iron. The thermal protection control circuit comprises an internal temperature control switch and a motherboard heating resistance, which are connected in series and form a motherboard heating circuit. The power supply of the motherboard heating circuit is supplied by an outer power supply. The thermal protection control circuit further comprises a protection circuit which is connected with the motherboard heating circuit in parallel. The protection circuit comprises a manual switch and a protection resistance, which are connected in series. The manual switch is a normally closed switch. The motherboard heating circuit is connected with an external temperature control switch in series, which is used for detecting the temperature of the protection resistance. The external temperature control switch is a contact switch which disconnects when the heating temperature of the protection resistance is higher than the temperature control valve thereof. Because the motherboard heating circuit is connected with the protection circuit in parallel, after a user places the electric iron on clothes and walks away for a while, the motherboard heating circuit is cut off, thus scorch and fire are avoided when the electric iron is placed horizontally and is heated continuously and the user walks away. The circuit is simple, safe and reliable.
Description
Technical field
The utility model relates to a kind of control circuit of electric iron, particularly a kind of thermal protection control circuit of dry type electric iron.
Background technology
Along with people's living standard promotes day by day, people also attach great importance in dress, and are quite high to clean and tidy, the very straight requirement of clothing especially, thereby make electric iron become one of important household electrical appliances commodity.Yet the security in the process of using of most electric iron is not high, as the temperature height, presses bad clothing easily, even makes other inflammable object cause fire alarm or the like.Though; existing electric iron has automatic power-off protection function when reaching rated temperature; but be only to cut off the power supply when placing vertically at once; and the termination heating function that do not cut off the power supply during static keeping flat lies against on the clothing and the user leaves when electric iron like this, and this clothes just still might occur burning; very the person produces fire incident; for this reason, there is above-mentioned hidden danger in existing electric iron, affects applying of product to a certain extent.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of simple in structure, and does not use and remain static and keep flat the thermal protection control circuit that promptly stops base plate heating, safe and reliable dry type electric iron behind the certain hour.
Goal of the invention of the present utility model is achieved in that a kind of thermal protection control circuit of dry type electric iron; comprise the inside temperature detect switch (TDS) and the base plate heating resistor that are connected in series; inside temperature detect switch (TDS) after being connected in series and base plate heating resistor constitute the base plate heater circuit; the base plate heater circuit is powered by external power; it is characterized in that: described thermal protection control circuit also comprises the holding circuit that is connected in parallel with the base plate heater circuit; described holding circuit comprises hand switch and the protective resistance that is connected in series; hand switch is normally closed switch under free state; be in series with the outside temperature detect switch (TDS) that is used to detect the protective resistance temperature on the base plate heater circuit, the contact-making switch that outside temperature detect switch (TDS) disconnects when surpassing its temperature control threshold values for the heating temp when protective resistance.By the setting of base plate heater circuit and holding circuit, effectively guaranteed electric iron to be kept flat and when not working, the base plate of electric iron stops heating as the user.
Further improvement for technique scheme; the utility model is provided with gravity switch on described holding circuit; described gravity switch is is the normally closed switch of closure state when the electric iron horizontal positioned; guaranteed electric iron under vertical placement situation, the base plate of electric iron still can continue heated at constant temperature.
In addition, be in series with fuse on the described base plate heater circuit.
Above-mentioned fuse is a fuse.
The utility model improves the dry type electric iron heater circuit of prior art, and it has the following advantages:
The utility model is arranged in parallel holding circuit on conventional electric iron base plate heater circuit; when the user lies in electric iron on the clothing and leaves; hand switch is replied own state and closure immediately; protective resistance heating this moment; when the heating temp of heating resistor surpasses the rated temperature of outside temperature detect switch (TDS); temperature detect switch (TDS) disconnects immediately; cut off the base plate heater circuit; be that base plate no longer is heated, keep situation about heating after effectively having prevented electric iron the people leaving under flat condition for a long time, avoid occurring burning the situation of clothing; also stopped the generation of fire incident; circuit structure is simple, and product safety coefficient height is beneficial to promoting the use of of product greatly.Simultaneously, gravity switch is set on holding circuit, has guaranteed electric iron under vertical placement situation, the base plate of electric iron still can continue heated at constant temperature.
Description of drawings
Accompanying drawing 1 keeps flat the circuit state figure of operator when operating launder for being among the utility model embodiment;
Accompanying drawing 2 is for being in the circuit state figure that keeps flat when unattended among the utility model embodiment;
Accompanying drawing 3 is in the circuit state figure of vertical laying state for the utility model embodiment.
The specific embodiment
The utility model will be further described below in conjunction with accompanying drawing.
With reference to the accompanying drawings shown in 1; the thermal protection control circuit of dry type electric iron described in the utility model; comprise the inside temperature detect switch (TDS) 1 and the base plate heating resistor 2 that are connected in series; inside temperature detect switch (TDS) 1 after being connected in series and base plate heating resistor 2 constitute the base plate heater circuit, and the base plate heater circuit is powered by external power.Described this heating resistor is installed in the base plate of electric iron, temperature detect switch (TDS) is a normally closed switch, and it is used to detect the heating temp of heating resistor, when the heating temp of heating resistor too high and when surpassing the temperature control threshold values of inner temperature detect switch (TDS) 1, the base plate heater circuit is cut off in the temperature detect switch (TDS) short circuit.Thermal protection control circuit described in the utility model also comprises the holding circuit that is connected in parallel with the base plate heater circuit; this holding circuit comprises hand switch 3 and the protective resistance 4 that is connected in series; hand switch 3 is normally closed switch under free state; these hand switch 3 operated by rotary motion are in the lever position of electric iron; when the operator does not hold lever; hand switch 3 closures; it is the holding circuit conducting; and when the user holds the lever of electric iron and depresses hand switch 3; hand switch 3 disconnects, the electric current base plate heater circuit of only flowing through.Be in series with the outside temperature detect switch (TDS) 5 that is used to detect protective resistance 4 temperature on the base plate heater circuit, the contact-making switch that outside temperature detect switch (TDS) 5 disconnects when surpassing its temperature control threshold values for the heating temp when protective resistance 4.By the setting of base plate heater circuit and holding circuit, effectively guaranteed electric iron to be kept flat and behind the certain hour of not working as the user, the base plate of electric iron stops heating.In addition, be in series with fuse 7 on the described base plate heater circuit, this fuse 7 is a fuse.
In the utility model, when electric iron be in keep flat and the operator in operation during launder, the operator holds lever, depress hand switch 3, electric current only to 2 heating of base plate heating resistor, makes the base plate of electric iron have enough temperature to carry out launder work, as shown in Figure 1, at this moment, inner temperature detect switch (TDS) 1 also detects the temperature of base plate heating resistor 2 simultaneously, also avoids base plate the too high phenomenon of temperature to occur.
And electric iron is in when keeping flat unattended launder; owing to there is not operator's lever of holding with a firm grip; hand switch 3 on the lever keeps free state---closure; at this moment; electric current is except heating the base plate heater circuit; also holding circuit is heated simultaneously; protective resistance 4 temperature rise of being heated; behind the process certain hour (being traditionally arranged to be 2-3 minute); when the temperature rise of protective resistance 4 surpassed the temperature control threshold values of outside temperature detect switch (TDS) 5, outside temperature detect switch (TDS) 5 opened circuit, and has cut off the base plate heater circuit; make base plate heating resistor 2 no longer be heated, shown in 2.
Simultaneously, the utility model is provided with gravity switch 6 on described holding circuit, and described gravity switch 6 is to be the normally closed switch of closure state when the electric iron horizontal positioned.When electric iron under vertical placement situation; gravity switch 6 disconnects; the holding circuit outage; and the base plate heater circuit still has electric current to pass through; the base plate of electric iron still can continue heated at constant temperature; make to be heated to operating temperature so as not to waiting as long for base plate when electric iron reenters launder work, as shown in Figure 3.
At this; the utility model is owing to be arranged in parallel holding circuit on the base plate heater circuit; when the user lies in electric iron on the clothing and leaves; hand switch 3 is replied own state and closure immediately; protective resistance 4 heatings this moment; when the heating temp of heating resistor surpasses the rated temperature of outside temperature detect switch (TDS) 5; temperature detect switch (TDS) disconnects immediately, cuts off the base plate heater circuit, and base plate no longer is heated; keep situation about heating after effectively having prevented electric iron the people leaving under flat condition for a long time; avoid occurring burning the situation of clothing, also stopped the generation of fire incident, circuit structure is simple; product safety coefficient height is beneficial to promoting the use of of product greatly.
Claims (4)
1. the thermal protection control circuit of a dry type electric iron; comprise the inside temperature detect switch (TDS) (1) and the base plate heating resistor (2) that are connected in series; inside temperature detect switch (TDS) (1) after being connected in series and base plate heating resistor (2) constitute the base plate heater circuit; the base plate heater circuit is powered by external power; it is characterized in that: described thermal protection control circuit also comprises the holding circuit that is connected in parallel with the base plate heater circuit; described holding circuit comprises hand switch (3) and the protective resistance (4) that is connected in series; hand switch (3) is normally closed switch under free state; be in series with the outside temperature detect switch (TDS) (5) that is used to detect protective resistance (4) temperature on the base plate heater circuit, the contact-making switch that outside temperature detect switch (TDS) (5) disconnects when surpassing its temperature control threshold values for the heating temp when protective resistance (4).
2. according to the thermal protection control circuit of the described dry type electric iron of claim 1, it is characterized in that: described holding circuit is provided with gravity switch (6), and described gravity switch (6) is is the normally closed switch of closure state when the electric iron horizontal positioned.
3. according to the thermal protection control circuit of the described dry type electric iron of claim 1, it is characterized in that: be in series with fuse (7) on the described base plate heater circuit.
4. according to the thermal protection control circuit of the described dry type electric iron of claim 3, it is characterized in that: described fuse (7) is a fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202181386U CN201670991U (en) | 2010-06-04 | 2010-06-04 | Thermal protection control circuit of dry electric iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202181386U CN201670991U (en) | 2010-06-04 | 2010-06-04 | Thermal protection control circuit of dry electric iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201670991U true CN201670991U (en) | 2010-12-15 |
Family
ID=43328403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202181386U Expired - Fee Related CN201670991U (en) | 2010-06-04 | 2010-06-04 | Thermal protection control circuit of dry electric iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201670991U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881980A (en) * | 2010-06-04 | 2010-11-10 | 佛山市顺德区佳玛电器有限公司 | Thermal protection control circuit of electric iron |
-
2010
- 2010-06-04 CN CN2010202181386U patent/CN201670991U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881980A (en) * | 2010-06-04 | 2010-11-10 | 佛山市顺德区佳玛电器有限公司 | Thermal protection control circuit of electric iron |
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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: 20101215 Termination date: 20120604 |