CN105890043A - Automatic on-off bath heater control system based on overcurrent protection circuit - Google Patents
Automatic on-off bath heater control system based on overcurrent protection circuit Download PDFInfo
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- CN105890043A CN105890043A CN201610399148.6A CN201610399148A CN105890043A CN 105890043 A CN105890043 A CN 105890043A CN 201610399148 A CN201610399148 A CN 201610399148A CN 105890043 A CN105890043 A CN 105890043A
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- pole
- resistance
- audion
- polar capacitor
- control chip
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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
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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)
- Amplifiers (AREA)
Abstract
The invention discloses an automatic on-off bath heater control system based on an overcurrent protection circuit. The automatic on-off bath heater control system is characterized by being mainly composed of a control chip U, a temperature controller, an audion VT2, a polar capacitor C5, a polar capacitor C4, a voltage stabilizing diode D3, a transistor switch buffering circuit connected between the temperature controller and the control chip U in series, a base electrode driving circuit connected with the control chip U and the overcurrent protection circuit connected between the base electrode driving circuit and an ORV pin of the control chip U in series. Temperature of a heating lamp of a bath heater can be controlled, namely connection and disconnection of working currents of the bath heater can be controlled, and therefore the temperature of the bath heater can be controlled by the control system. Meanwhile, instant large currents of the input currents can be inhibited, the currents are kept stable, stable driving currents can be output, and therefore stability of bath heater heating temperature is ensured.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of based on current foldback circuit from open-close type bath
Despot's control system.
Background technology
Super bath is fast with its heating, environmental protection, the feature such as easy to use, extensively received by people and use.
But, the temperature of super bath can not be controlled by the control system of the super bath that current people use, and causes bathroom
Interior temperature is the most too high, thus causes people using super bath the situation of anoxia because of high temperature often occur.With
Time, the control system of existing super bath there is also the problem that output driving current is unstable, causes the warm of super bath
The heating-up temperature of lamp is unstable, thus have impact on the service life of the warm lamp of super bath.
The temperature of super bath can be controlled therefore it provides a kind of, can ensure that again the driving stream that output is stable
Super bath control system be the task of top priority.
Summary of the invention
The temperature of super bath can not be entered by the control system that it is an object of the invention to overcome super bath of the prior art
Row controls, and there is the defect that output driving current is unstable simultaneously, it is provided that one based on current foldback circuit
From open-close type super bath control system.
The present invention is achieved through the following technical solutions: a kind of based on current foldback circuit from open-close type super bath
By control system, mainly by control chip U, temperature controller, audion VT2, negative pole after resistance R9 with three
The colelctor electrode of pole pipe VT2 is connected, positive pole COV pin with control chip U after resistance R6 is connected
Polar capacitor C5, positive pole RC pin with control chip U after resistance R5 is connected, negative pole and control
The VDD pin phase of polar capacitor C4, the N pole that the FB pin of coremaking sheet U is connected and control chip U
The Zener diode D3 that connection, P pole are connected with the RC pin of control chip U after resistance R8, string
The transistor switch buffer circuit being connected between temperature controller and control chip U, is connected with control chip U
Base drive circuit, and the stream excessively being serially connected between the ORV pin of base drive circuit and control chip U
Protection circuit forms；The VDD pin of described control chip U is connected with the base stage of audion VT2, its
GND pin ground connection；The emitter stage of described audion VT2 is connected with base drive circuit；Described base stage is driven
Galvanic electricity road is connected with transistor switch buffer circuit.
Described current foldback circuit is by amplifier P, audion VT5, audion VT6, N pole and amplifier
The diode that the positive pole of P is connected, P pole is connected with the ORV pin of control chip U after resistance R16
D6, positive pole negative pole with amplifier P after resistance R18 is connected, the polar capacitor C10 of minus earth,
Negative pole base stage with audion VT5 after resistance R22 is connected, positive pole is connected with the outfan of amplifier P
The polar capacitor C11 connect, one end is connected with the colelctor electrode of audion VT6, the resistance R25 of other end ground connection,
After positive electrode resistance R23, the emitter stage with audion VT5 is connected, negative pole is connected with the base stage of audion VT6
The polar capacitor C13 connect, positive pole is connected with the colelctor electrode of audion VT5, negative pole after resistance R24 with
Polar capacitor C12, the N pole that the emitter stage of audion VT6 is connected is connected with the negative pole of polar capacitor C11
Connect, P pole is sequentially connected through adjustable resistance R20 negative pole with polar capacitor C12 after resistance R21 two
Pole pipe D7, and after positive electrode resistance R17, P pole with diode D6 is connected, negative pole is after resistance R19
The polar capacitor C9 composition being connected with the adjustable end of adjustable resistance R20；Described polar capacitor C12's is negative
Pole as the outfan of current foldback circuit and is connected with base drive circuit.
Described transistor switch buffer circuit is by field effect transistor MOS1, field effect transistor MOS2, audion
VT1, one end is connected with the grid of field effect transistor MOS1, the resistance R1 of other end ground connection, negative pole and three
The polar capacitor C1 that the base stage of pole pipe VT1 is connected, positive pole is connected with the source electrode of field effect transistor MOS1,
One end is connected with the emitter stage of audion VT1, the other end is connected with the source electrode of field effect transistor MOS1
The drain electrode with field effect transistor MOS2 after resistance R3 of resistance R2, N pole is connected, P pole and audion VT1
The diode D1 that is connected of colelctor electrode, positive pole is connected with the N pole of diode D1, negative pole and field effect
Polar capacitor C2, the P pole that the drain electrode of pipe MOS2 is connected is connected with the source electrode with field effect transistor MOS2,
The diode D2 that N pole is connected with the drain electrode of field effect transistor MOS2, and positive pole after resistance R4 with field
The source electrode of effect pipe MOS2 is connected, negative pole SS pin with control chip U after resistance R7 is connected
Polar capacitor C3 composition；The grounded drain of described field effect transistor MOS1；Described field effect transistor MOS2
Grid be connected with the N pole of diode D1, its drain electrode respectively with FB pin and the base of control chip U
Pole drive circuit is connected；The grid of described field effect transistor MOS1 is connected with temperature controller；Described audion
The emitter stage of VT1 is connected with the RC pin of control chip U；The emitter stage conduct of described audion VT1
The input of transistor switch buffer circuit.
Described base drive circuit by audion VT3, audion VT4, N pole after resistance R12 with three poles
The diode D4 that the base stage of pipe VT3 is connected, P pole is connected with the ISNS pin of control chip U, just
Pole emitter stage with audion VT3 after resistance R13 is connected, the emitter stage phase of negative pole and audion VT4
The polar capacitor C6 connected, one end is connected with the base stage of audion VT4, the other end and polar capacitor C12
The resistance R10 that is connected of negative pole, positive pole colelctor electrode with audion VT4 after resistance R14 is connected,
The polar capacitor C7 of minus earth, one end is connected with the negative pole of polar capacitor C7, the other end and audion
Resistance R11, the P pole that the emitter stage of VT2 is connected is connected with the emitter stage of audion VT3, N pole warp
The diode D5 that after resistance R15, negative pole with polar capacitor C7 is connected, and positive pole after inductance L with
The colelctor electrode of audion VT4 is connected, negative pole is collectively forming base drive electricity with the negative pole of polar capacitor C7
The polar capacitor C8 composition of the outfan on road；The colelctor electrode of described audion VT3 and the VDD of control chip U
Pin is connected；The negative pole of described polar capacitor C7 is connected with the FB pin of control chip U.
For the practical effect of the present invention, described control chip U the most preferentially uses TPS402000 collection
Chip is become to realize.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) temperature of the warm lamp of super bath can be controlled by the present invention, i.e. the present invention can be to super bath operating current
Break-make be controlled, make super bath can set at a temperature of realize automatically turn on and close, ensure that
The temperature of super bath can be controlled by the present invention, is effectively prevented the situation of people's anoxia because of high temperature；With
Time, the instantaneous high current of input current can be suppressed, make electric current held stationary, make invention energy by the present invention
Export stable driving electric current, ensure that the stability of super bath heating-up temperature.
(2) overcurrent of main circuit and overvoltage can all be protected by the present invention, make power frequency keep steady
Fixed, it is effectively prevented too drastic damage of electric current and loads, thus improve the stability of the output electric current of the present invention.
(3) the control chip U of the present invention the most preferentially uses the integrated chip of TPS402000 to realize, this core
Sheet combines with peripheral circuit and effectively can be adjusted output electric current, enables the invention to export stable driving
Streaming current, ensures that the present invention can provide stable operating current for super bath, makes the warm lamp of super bath heat
Temperature keeps stable.
(4) present invention can export stable electric current, thus the present invention can effectively extend the making of warm lamp of super bath
Use the life-span.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the current foldback circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail, but the enforcement of the present invention
Mode is not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U, temperature controller, audion VT2, resistance R5,
Resistance R6, resistance R8, resistance R9, polar capacitor C4, polar capacitor C5, Zener diode D3, mistake
Stream protection circuit, transistor switch buffer circuit, and base drive circuit composition.
During enforcement, the negative pole of polar capacitor C5 colelctor electrode with audion VT2 after resistance R9 is connected,
Its positive pole COV pin with control chip U after resistance R6 is connected.The positive pole warp of polar capacitor C4
After resistance R5 the RC pin with control chip U be connected, the FB pin phase of its negative pole and control chip U
Connect.The N pole of Zener diode D3 is connected with the VDD pin of control chip U, its P pole is through resistance
After R8, the RC pin with control chip U is connected.Current foldback circuit is serially connected in base drive circuit and control
Between the ORV pin of coremaking sheet U.Transistor switch buffer circuit be serially connected in temperature controller and control chip U
Between.Base drive circuit is connected with control chip U.
The VDD pin of described control chip U is connected with the base stage of audion VT2, its GND pin
Ground connection；The emitter stage of described audion VT2 is connected with base drive circuit；Described base drive circuit with
Transistor switch buffer circuit is connected.
Further, described transistor switch buffer circuit by field effect transistor MOS1, field effect transistor MOS2,
Audion VT1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R7, polar capacitor C1,
Polar capacitor C2, polar capacitor C3, diode D1, and diode D2 form.
During connection, one end of resistance R1 is connected with the grid of field effect transistor MOS1, its other end ground connection.
The negative pole of polar capacitor C1 is connected with the base stage of audion VT1, its positive pole and field effect transistor MOS1
Source electrode is connected.One end of resistance R2 is connected with the emitter stage of audion VT1, its other end is imitated with field
Should the source electrode of pipe MOS1 be connected.The N pole of diode D1 after resistance R3 with field effect transistor MOS2
Drain electrode be connected, its P pole is connected with the colelctor electrode of audion VT1.
Meanwhile, the positive pole of polar capacitor C2 be connected with the N pole of diode D1, its negative pole and field effect
The drain electrode of pipe MOS2 is connected.The P pole of diode D2 is connected with the source electrode with field effect transistor MOS2,
Its N pole is connected with the drain electrode of field effect transistor MOS2.The positive pole of polar capacitor C3 after resistance R4 with field
The source electrode of effect pipe MOS2 is connected, its negative pole SS pin with control chip U after resistance R7 is connected
Connect.
The grounded drain of described field effect transistor MOS1；The grid of described field effect transistor MOS2 and diode
The N pole of D1 is connected, its drain electrode is connected with FB pin and the base drive circuit of control chip U respectively
Connect；The grid of described field effect transistor MOS1 is connected with temperature controller；The emitter stage of described audion VT1 with
The RC pin of control chip U is connected；The emitter stage of described audion VT1 buffers as transistor switch
The input of circuit is all connected with external power source with temperature controller.
Further, described base drive circuit by audion VT3, audion VT4, resistance R10,
Adjustable resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, inductance L, polar capacitor
C6, polar capacitor C7, polar capacitor C8, diode D4, and diode D5 form.
During connection, the N pole of diode D4 base stage with audion VT3 after resistance R12 is connected,
Its P pole is connected with the ISNS pin of control chip U.Positive pole after resistance R13 with audion VT3's
The polar capacitor C6, resistance R10 that emitter stage is connected, negative pole is connected with the emitter stage of audion VT4
One end be connected with the base stage of audion VT4, its other end is connected with the negative pole of polar capacitor C12.
Meanwhile, the positive pole of polar capacitor C7 colelctor electrode with audion VT4 after resistance R14 be connected,
Its minus earth.One end of resistance R11 is connected with the negative pole of polar capacitor C7, its other end and audion
The emitter stage of VT2 is connected.The P pole of diode D5 is connected with the emitter stage of audion VT3, its N
Pole negative pole with polar capacitor C7 after resistance R15 is connected.The positive pole of polar capacitor C8 is after inductance L
Be connected with the colelctor electrode of audion VT4, the negative pole of its negative pole and polar capacitor C7 is collectively forming base stage and drives
The outfan on galvanic electricity road is also connected with warm lamp group.
The colelctor electrode of described audion VT3 is connected with the VDD pin of control chip U；Described polarity electricity
The negative pole holding C7 is connected with the FB pin of control chip U.
As in figure 2 it is shown, described current foldback circuit is by amplifier P, audion VT5, audion VT6,
Resistance R16, resistance R17, resistance R18, resistance R19, adjustable resistance R20, resistance R21, resistance
R22, resistance R23, resistance R24, resistance R25, polar capacitor C9, polar capacitor C10, polar capacitor
C11, polar capacitor C12, polar capacitor C13, diode D6, and diode D7 form.
During connection, the N pole of diode D6 is connected with the positive pole of amplifier P, its P pole is through resistance R16
It is connected with the ORV pin of control chip U afterwards.The positive pole of polar capacitor C10 after resistance R18 with put
The negative pole of big device P is connected, its minus earth.The negative pole of polar capacitor C11 after resistance R22 with three poles
The base stage of pipe VT5 is connected, its positive pole is connected with the outfan of amplifier P.
Wherein, one end of resistance R25 be connected with the colelctor electrode of audion VT6, its other end ground connection.
After positive electrode resistance R23 of polar capacitor C13 the emitter stage with audion VT5 be connected, its negative pole and three poles
The base stage of pipe VT6 is connected.The positive pole of polar capacitor C12 is connected with the colelctor electrode of audion VT5, it
Negative pole emitter stage with audion VT6 after resistance R24 is connected.
Meanwhile, the N pole of diode D7 is connected with the negative pole of polar capacitor C11, sequentially warp can in its P pole
It is connected with the negative pole of polar capacitor C12 after adjusting resistance R20 and resistance R21.The positive pole of polar capacitor C9
After resistance R17 the P pole with diode D6 be connected, its negative pole after resistance R19 with adjustable resistance R20
Adjustable end be connected.The negative pole of described polar capacitor C12 as current foldback circuit outfan and and base
Pole drive circuit is connected.
During operation, the temperature controller of the present invention the most preferentially have employed KDS020-B temperature controller, the temperature of this temperature controller
Degree is set as 38 DEG C, and when the temperature in bathroom is less than 38 DEG C, this temperature controller is closure state, and the present invention is energized,
Meanwhile, the instantaneous high current of input current can be suppressed by the present invention, makes electric current held stationary, makes invention
Stable driving electric current can be exported, ensure that super bath energy heating-up temperature temperature is stable.When the temperature of super bath reaches
When setting to temperature controller is stablized, temperature controller will disconnect, dead electricity the most of the present invention, stops warming up for super bath
The warm lamp of lamp output electric current, i.e. super bath stops heating, until the temperature in super bath is steady less than the setting of temperature controller
After fixed, temperature controller closes the most automatically, the present invention the most again export stable drive electric current to the warm lamp of super bath, i.e.
The warm lamp of super bath then continues heating.
Meanwhile, the overcurrent of main circuit and overvoltage can all be protected by the present invention, make power frequency keep
Stable, it is effectively prevented too drastic damage of electric current and loads, thus improve stablizing of the output electric current of the present invention
Property.For the practical effect of the present invention, described control chip U the most preferentially uses TPS402000 integrated
Chip realizes, and this chip combines with peripheral circuit and effectively can be adjusted output electric current, makes this
Bright can the stable driving electric current of output, ensure that the present invention can provide stable operating current for super bath,
The warm lamp heating-up temperature making super bath keeps stable, is effectively prevented people simultaneously and occurs because of high temperature in bathroom
Spend and the situation of anoxia.
According to above-described embodiment, can well realize the present invention.
Claims (5)
1. one kind based on current foldback circuit from open-close type super bath control system, it is characterised in that main
Will be by control chip U, temperature controller, audion VT2, negative pole after resistance R9 with the collection of audion VT2
The polar capacitor C5 that electrode is connected, positive pole is connected with the COV pin of control chip U after resistance R6,
Positive pole RC pin with control chip U after resistance R5 is connected, the FB pipe of negative pole and control chip U
Polar capacitor C4, the N pole that foot is connected is connected with the VDD pin of control chip U, P pole is through resistance
The Zener diode D3 being connected with the RC pin of control chip U after R8, is serially connected in temperature controller and control
Transistor switch buffer circuit between chip U, the base drive circuit being connected with control chip U, with
And the current foldback circuit composition being serially connected between the ORV pin of base drive circuit and control chip U；Institute
The base stage of the VDD pin and audion VT2 of stating control chip U is connected, its GND pin ground connection；Institute
The emitter stage stating audion VT2 is connected with base drive circuit；Described base drive circuit is opened with transistor
Pass buffer circuit is connected.
The most according to claim 1 a kind of based on current foldback circuit from the control of open-close type super bath
System, it is characterised in that described current foldback circuit by amplifier P, audion VT5, audion VT6,
N pole is connected with the positive pole of amplifier P, P pole after resistance R16 with the ORV pin phase of control chip U
The diode D6 connected, positive pole negative pole with amplifier P after resistance R18 is connected, the pole of minus earth
Property electric capacity C10, negative pole base stage with audion VT5 after resistance R22 is connected, positive pole and amplifier P
The polar capacitor C11 that is connected of outfan, one end is connected with the colelctor electrode of audion VT6, the other end
The resistance R25 of ground connection, after positive electrode resistance R23 the emitter stage with audion VT5 be connected, negative pole and three poles
The polar capacitor C13 that the base stage of pipe VT6 is connected, positive pole is connected with the colelctor electrode of audion VT5, bears
Polar capacitor C12, the N pole that pole emitter stage with audion VT6 after resistance R24 is connected and polarity electricity
Hold C11 negative pole be connected, P pole sequentially after adjustable resistance R20 and resistance R21 with polar capacitor C12
The diode D7 that is connected of negative pole, and after positive electrode resistance R17 P pole with diode D6 be connected,
The polar capacitor C9 composition that negative pole is connected with the adjustable end of adjustable resistance R20 after resistance R19；Described
The negative pole of polar capacitor C12 as the outfan of current foldback circuit and is connected with base drive circuit.
The most according to claim 2 a kind of based on current foldback circuit from the control of open-close type super bath
System, it is characterised in that described transistor switch buffer circuit is by field effect transistor MOS1, field effect transistor
MOS2, audion VT1, one end is connected with the grid of field effect transistor MOS1, the resistance of other end ground connection
R1, negative pole is connected with the base stage of audion VT1, positive pole is connected with the source electrode of field effect transistor MOS1
Polar capacitor C1, one end is connected with the emitter stage of audion VT1, the other end and field effect transistor MOS1
The drain electrode with field effect transistor MOS2 after resistance R3 of resistance R2, the N pole that is connected of source electrode be connected, P
The diode D1 that pole is connected with the colelctor electrode of audion VT1, positive pole is connected with the N pole of diode D1,
Polar capacitor C2, the P pole that negative pole is connected with the drain electrode of field effect transistor MOS2 with field effect transistor MOS2
The diode D2 that source electrode is connected, N pole is connected with the drain electrode of field effect transistor MOS2, and positive pole warp
After resistance R4 the source electrode with field effect transistor MOS2 be connected, negative pole after resistance R7 with control chip U's
The polar capacitor C3 composition that SS pin is connected；The grounded drain of described field effect transistor MOS1；Described field
The grid of effect pipe MOS2 is connected with the N pole of diode D1, it drains respectively with control chip U's
FB pin is connected with base drive circuit；The grid of described field effect transistor MOS1 is connected with temperature controller
Connect；The emitter stage of described audion VT1 is connected with the RC pin of control chip U；Described audion VT1
Emitter stage as the input of transistor switch buffer circuit.
The most according to claim 3 a kind of based on current foldback circuit from the control of open-close type super bath
System, it is characterised in that described base drive circuit is by audion VT3, and audion VT4, N pole is through electricity
Be connected with the base stage of audion VT3 after resistance R12, P pole is connected with the ISNS pin of control chip U
Diode D4, positive pole emitter stage with audion VT3 after resistance R13 is connected, negative pole and three poles
The polar capacitor C6 that the emitter stage of pipe VT4 is connected, one end is connected with the base stage of audion VT4, separately
The resistance R10 that one end is connected with the negative pole of polar capacitor C12, positive pole after resistance R14 with audion VT4
Colelctor electrode be connected, the polar capacitor C7 of minus earth, one end is connected with the negative pole of polar capacitor C7,
Resistance R11, the P pole that the other end is connected with the emitter stage of audion VT2 and the emitter stage of audion VT3
Be connected, diode D5, Yi Jizheng that N pole negative pole with polar capacitor C7 after resistance R15 is connected
Pole is connected with the colelctor electrode of audion VT4 after inductance L, negative pole is common with the negative pole of polar capacitor C7
Form the polar capacitor C8 composition of the outfan of base drive circuit；The colelctor electrode of described audion VT3 with
The VDD pin of control chip U is connected；The negative pole of described polar capacitor C7 and the FB of control chip U
Pin is connected.
The most according to claim 4 a kind of based on current foldback circuit from the control of open-close type super bath
System, it is characterised in that described control chip U is the integrated chip of TPS402000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610399148.6A CN105890043A (en) | 2016-06-07 | 2016-06-07 | Automatic on-off bath heater control system based on overcurrent protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610399148.6A CN105890043A (en) | 2016-06-07 | 2016-06-07 | Automatic on-off bath heater control system based on overcurrent protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105890043A true CN105890043A (en) | 2016-08-24 |
Family
ID=56710901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610399148.6A Pending CN105890043A (en) | 2016-06-07 | 2016-06-07 | Automatic on-off bath heater control system based on overcurrent protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105890043A (en) |
-
2016
- 2016-06-07 CN CN201610399148.6A patent/CN105890043A/en active Pending
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Application publication date: 20160824 |