CN105828461A - Shutdown-delay and cooling control circuit for electric heating equipment and cooling protection method - Google Patents
Shutdown-delay and cooling control circuit for electric heating equipment and cooling protection method Download PDFInfo
- Publication number
- CN105828461A CN105828461A CN201610320578.4A CN201610320578A CN105828461A CN 105828461 A CN105828461 A CN 105828461A CN 201610320578 A CN201610320578 A CN 201610320578A CN 105828461 A CN105828461 A CN 105828461A
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- Prior art keywords
- delay
- electric heating
- heating equipment
- relay
- fan
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1096—Arrangement or mounting of control or safety devices for electric heating systems
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/0252—Domestic applications
- H05B1/0275—Heating of spaces, e.g. rooms, wardrobes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
Abstract
The invention discloses a shutdown-delay and cooling control circuit for electric heating equipment and a cooling protection method. The circuit comprises a power source, an electric heater, a fan, a delay circuit and a delay control circuit, wherein when the electric heating equipment is switched on, the power source is connected to the electric heater and the fan and powers the electric heater and the fan; and when the electric heating equipment is shut down, the power source is disconnected from the electric heater, the power source is connected to the delay circuit, the delay circuit is connected to the delay control circuit, and the delay control circuit controls the power source to be disconnected from the fan when time of the delay circuit reaches preset time. The method comprises the steps that the electric heating equipment is shut down; the electric heater stops work; and the fan stops work after being delayed for the present time. The shutdown-delay and cooling control circuit for the electric heating equipment and the cooling protection method disclosed by the invention have the advantages that the fan is shut down after working for the delayed time after the equipment is shut down, so that all the power sources can be automatically disconnected after the temperature in the equipment is reduced, and a fire disaster caused by ultrahigh heat inside can be avoided.
Description
Technical field
The present invention relates to electric heating equipment technical field, particularly to a kind of electric heating equipment shutdown time delay cooling control circuit and temperature-reduction protective.
Background technology
At present, market having substantial amounts of heating system, in housed device, warm-air drier and hair drier owning amount are huge.If but the most improper meeting of these equipment causes fire incident, is primarily due to its internal heat too high, the most after shut down, equipment also leaves higher dangerous temperature and can ignite the combustible of surrounding, cause fire.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art; a kind of electric heating equipment shutdown time delay cooling control circuit and temperature-reduction protective are proposed; after shut down; power-off again after fan delay working a period of time; the all working power supply of automatic cutting equipment again after temperature in equipment can being reduced, it is to avoid internal heat is too high and causes fire.
For solving above-mentioned technical problem, the present invention is achieved through the following technical solutions:
The present invention provides a kind of electric heating equipment shutdown time delay cooling control circuit, comprising: power supply, electric heater, fan, delay circuit and delay control circuit, wherein,
When electric heating equipment is started shooting, described power supply is connected with described electric heater and described fan, powers for described electric heater and described fan；
When described electric heating equipment shuts down, described power supply disconnects with described electric heater, described power supply is connected with described delay circuit, described delay circuit is connected with described delay control circuit, when the time of described delay circuit reaches Preset Time, described delay control circuit controls described power supply and disconnects with described fan.
It is preferred that described delay control circuit includes: the first relay, the second relay, the first relay normally open switch A, the first relay normally open switch B and the second relay normally closed switch, wherein,
Described first relay is connected with described second relay normally closed switch, and described first relay and described second relay normally closed switch are in parallel with described fan；
Described second relay is the load of described delay circuit；
Described first relay normally open switch A is connected between described power supply and described fan；
Described first relay normally open switch B is connected between described power supply and described delay circuit；
When described electric heating equipment is started shooting, described first relay is in adhesive immediately hold mode, and described second relay is in release conditions；
When described electric heating equipment shuts down, and when the time of described delay circuit is not up to described Preset Time, described first relay is in attracting state, and described second relay is in release conditions；
When described electric heating equipment shuts down, and when the time of described delay circuit reaches described Preset Time, described second relay is in attracting state, and described first relay is in release conditions.
It is preferred that electric heating equipment shutdown time delay cooling control circuit also includes: power supply indicator, in parallel with described fan；When described fan is opened, described power supply indicator is bright, and when described fan disconnects, described power supply indicator goes out.
It is preferred that be additionally provided with mains transformer between described power supply and described delay circuit,
It is preferred that be additionally provided with commutator between described mains transformer and described delay circuit.
It is preferred that be additionally provided with manostat between described commutator and described delay circuit.
It is preferred that the Preset Time of described delay circuit is adjustable.
The present invention also provides for a kind of electric heating equipment shutdown time delay temperature-reduction protective, and it comprises the following steps:
S11: electric heating equipment shuts down, and electric heater quits work, and fan works on；
S12: after postponing to reach Preset Time, fan quits work.
It is preferred that described step S12 also includes: when described fan quits work, power supply indicator goes out.
Compared to prior art, the invention have the advantages that
(1) the electric heating equipment shutdown time delay cooling control circuit and temperature-reduction protective that the present invention provides; after shut down; simply by electric heater power-off immediately; power-off again after fan delay working a period of time; the all working power supply of automatic cutting equipment again after temperature in equipment can being reduced, it is to avoid internal heat is too high and causes fire；
(2) delay control circuit of the present invention utilizes two relays to automatically control the power-off of fan according to the Preset Time of delay circuit, it is achieved that full-automatic.
Certainly, the arbitrary product implementing the present invention it is not absolutely required to reach all the above advantage simultaneously.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings embodiments of the present invention are described further:
Fig. 1 a is the schematic diagram one of the electric heating equipment shutdown time delay cooling control circuit of embodiments of the invention；
Fig. 1 b is the schematic diagram two of the electric heating equipment shutdown time delay cooling control circuit of embodiments of the invention；
Fig. 2 is the starting procedure figure of the electric heating equipment of embodiments of the invention；
Fig. 3 is the shutdown process figure of the electric heating equipment of embodiments of the invention.
Detailed description of the invention
Elaborating embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, gives detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1:
The electric heating equipment shutdown time delay cooling control circuit of the present invention is described in detail by the present embodiment, comprising: power supply, electric heater RJ, fan F, delay circuit U2 and delay control circuit, wherein, when electric heating equipment is started shooting, power supply is connected with electric heater and fan, powers for electric heater and fan；When electric heating equipment shuts down, power supply disconnects with electric heater, and power supply is connected with delay circuit, and delay circuit is connected with delay control circuit, and when the time of delay circuit reaches Preset Time, delay control circuit controls power supply and disconnects with fan.
It is described below in conjunction with instantiation, in the present embodiment, delay control circuit includes: the first relay K A1, the second relay K A2, the first relay normally open switch AKA1-1, the first relay normally open switch BKA1-2 and the second relay normally closed switch KA2-1, wherein, first relay K A1 and the second relay normally closed switch KA2-1 series connection, the first relay K A1 and the second relay normally closed switch KA2-1 are in parallel with fan；Second relay K A2 is the load of delay circuit U2；First relay normally open switch AKA1-1 is connected between power supply and fan F；First relay normally open switch BKA1-2 is connected between power supply and delay circuit U2；When electric heating equipment is started shooting, first relay K A1 is in on-state immediately, first relay normally open switch AKA1-1 and the first relay normally open switch BKA1-2 is in closure state immediately, and the second relay K A2 is in release conditions, and the second relay normally closed switch KA2-1 is in normally off；When electric heating equipment shuts down, and the time of delay circuit U2 is when being not up to Preset Time, first relay K A1 is in attracting state, first relay normally open switch AKA1-1 and the first relay normally open switch BKA1-2 is in attracting state, second relay K A2 is in release conditions, second relay normally closed switch KA2-1 is in normally off, and fan F works on；When electric heating equipment shuts down, and the time of delay circuit is when reaching Preset Time, second relay K A2 is in attracting state, second relay normally closed switch KA2-1 is off, first relay K A1 is in release conditions, first relay switch AKA1-1 and the first relay normally open switch BKA1-2 is in normally open, and fan F quits work.Its circuit theory diagrams are made up of Fig. 1 a and 1b, and power supply is 220V alternating current, and the on and off switch S1 of power supply is double-point double-throw switch, including S1-1 and S1-2, during start, S1-1 and S1-2, all in open state, powers for electric heater RJ and fan F, during shutdown, S1-1 and S1-2 is all in off status, and now S1-1 connects delay circuit U2 and fan F, and fan F works on, S1-2 disconnects the power supply of electric heater RJ, and electric heater RJ quits work；nullDelay circuit U2 is provided with a Preset Time，This time can adjust as required，When not up to Preset Time，Do not output signal to the second relay K A2，Fan F is still within "on" position，Work on，Waste heat in equipment is distributed，When reaching Preset Time，Delay circuit U2 outputs signal to the second relay K A2，Second relay K A2 adhesive，The second corresponding relay normally closed switch KA2-1 disconnects，The coil of the first relay K A1 of series connection with it is at release conditions，The first relay normally open switch AKA1-1 corresponding with the first relay and the first relay normally open switch BKA1-2 is in normally open，Namely it is disconnected fan F and the power supply of delay circuit U2，Fan F quits work，The most all of equipment all quits work，I.e. achieve shutdown truly.
In the present embodiment, the two ends of fan F are also parallel with power supply indicator D1, and for indicating the duty of fan F, during fan F work, power supply indicator D1 is bright, and when fan F quits work, power supply indicator D1 goes out.
In the present embodiment, between power supply and delay circuit U2, it is also associated with mains transformer T1, for 220V alternating current is reduced to low AC voltage, between mains transformer T1 and delay circuit U2, is also associated with commutator Q, for alternating current is converted to unidirectional current；Further, between commutator Q and delay circuit U2, it is also associated with manostat U1, to ensure the voltage stabilization of delay circuit U2；Delay circuit U2 uses NE555 herein.
In different embodiments, according to the difference of the voltage needed for the voltage of power supply and delay circuit U2, it is possible to be not provided with mains transformer T1, commutator Q and manostat U1, these it is not necessary to element.
Embodiment 2:
The electric heating equipment shutdown time delay temperature-reduction protective of the present invention is described in detail by the present embodiment; it is the time delay temperature-reduction protective using the time delay cooling control circuit of embodiment 1 to realize; the start process of electric heating equipment is as shown in Figure 2; during start; the S1-1 of on and off switch opens; fan F starts working, and the first relay K A1 is in attracting state, and power supply indicator D1 is bright；S1-2 opens simultaneously, and electric heater RJ begins to warm up.When the shutdown process of electric heater is as it is shown on figure 3, shut down, S1-2 closes, and electric heater RJ stops work heating；S1-1 closes simultaneously, power supply passes through KA1-2 switch connection, delay circuit U2 starts timing (Preset Time is set to 50S herein, in different embodiments, can be configured as required), not up to during 50S, KA1-1 starts shooting connection, and fan F works on, KA1 adhesive, power supply indicator D1 is bright, when reaching 50S, KA2 adhesive, corresponding KA2-1 disconnects, the releasing winding of KA1, corresponding KA1-1 disconnects, and fan F quits work, and power supply indicator D1 goes out, KA1-2 also disconnects, delay circuit power-off.
Disclosed herein is only the preferred embodiments of the present invention, and these embodiments are chosen and specifically described to this specification, is to preferably explain the principle of the present invention and actual application, is not limitation of the invention.The modifications and variations that any those skilled in the art are done in the range of description, all should fall in the range of the present invention is protected.
Claims (9)
1. an electric heating equipment shutdown time delay cooling control circuit, it is characterised in that including: power supply, electric heater, fan, delay circuit and delay control circuit, wherein,
When electric heating equipment is started shooting, described power supply is connected with described electric heater and described fan, powers for described electric heater and described fan；
When described electric heating equipment shuts down, described power supply disconnects with described electric heater, described power supply is connected with described delay circuit, described delay circuit is connected with described delay control circuit, when the time of described delay circuit reaches Preset Time, described delay control circuit controls described power supply and disconnects with described fan.
Electric heating equipment the most according to claim 1 shutdown time delay cooling control circuit, it is characterized in that, described delay control circuit includes: the first relay, the second relay, the first relay normally open switch A, the first relay normally open switch B and the second relay normally closed switch, wherein
Described first relay is connected with described second relay normally closed switch, and described first relay and described second relay normally closed switch are in parallel with described fan；
Described second relay is the load of described delay circuit；
Described first relay normally open switch A is connected between described power supply and described fan；
Described first relay normally open switch B is connected between described power supply and described delay circuit；
When described electric heating equipment is started shooting, described first relay is in adhesive immediately hold mode, and described second relay is in release conditions；
When described electric heating equipment shuts down, and when the time of described delay circuit is not up to described Preset Time, described first relay is in attracting state, and described second relay is in release conditions；
When described electric heating equipment shuts down, and when the time of described delay circuit reaches described Preset Time, described second relay is in attracting state, and described first relay is in release conditions.
Electric heating equipment the most according to claim 1 shutdown time delay cooling control circuit, it is characterised in that also include: power supply indicator, in parallel with described fan；When described fan is opened, described power supply indicator is bright, and when described fan disconnects, described power supply indicator goes out.
Electric heating equipment the most according to claim 3 shutdown time delay cooling control circuit, it is characterised in that be additionally provided with mains transformer between described power supply and described delay circuit.
Electric heating equipment the most according to claim 4 shutdown time delay cooling control circuit, it is characterised in that be additionally provided with commutator between described mains transformer and described delay circuit.
Electric heating equipment the most according to claim 1 shutdown time delay cooling control circuit, it is characterised in that be additionally provided with manostat between described commutator and described delay circuit.
7. according to the electric heating equipment shutdown time delay cooling control circuit described in any one of claim 1 to 6, it is characterised in that the Preset Time of described delay circuit is adjustable.
8. an electric heating equipment shutdown time delay temperature-reduction protective, it is characterised in that comprise the following steps:
S11: electric heating equipment shuts down, and electric heater quits work, and fan works on；
S12: after postponing to reach Preset Time, fan quits work.
Electric heating equipment the most according to claim 8 shutdown time delay temperature-reduction protective, it is characterised in that described step S12 also includes: when described fan quits work, power supply indicator goes out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610320578.4A CN105828461B (en) | 2016-05-16 | 2016-05-16 | Shutdown delay cooling control circuit and cooling protection method for electric heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610320578.4A CN105828461B (en) | 2016-05-16 | 2016-05-16 | Shutdown delay cooling control circuit and cooling protection method for electric heating equipment |
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| Publication Number | Publication Date |
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| CN105828461A true CN105828461A (en) | 2016-08-03 |
| CN105828461B CN105828461B (en) | 2022-04-26 |
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| CN201610320578.4A Active CN105828461B (en) | 2016-05-16 | 2016-05-16 | Shutdown delay cooling control circuit and cooling protection method for electric heating equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113079602A (en) * | 2021-04-15 | 2021-07-06 | 深圳市赛舸电子科技有限公司 | Variable voltage power supply for high-power digital variable frequency induction cooker |
| CN115289599A (en) * | 2022-07-18 | 2022-11-04 | 珠海格力电器股份有限公司 | Auxiliary electric heating control method and system and air conditioner |
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| Publication number | Publication date |
|---|---|
| CN105828461B (en) | 2022-04-26 |
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