CN211959175U - Control device and electrical apparatus - Google Patents
Control device and electrical apparatus Download PDFInfo
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- CN211959175U CN211959175U CN202020371989.8U CN202020371989U CN211959175U CN 211959175 U CN211959175 U CN 211959175U CN 202020371989 U CN202020371989 U CN 202020371989U CN 211959175 U CN211959175 U CN 211959175U
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Abstract
The utility model is suitable for the technical field of electric appliance control, and provides a control device and an electric appliance device, wherein the control device comprises a main control unit, a direct current prevention unit, an energy storage unit, a control unit, a switch unit and a thermoelectric unit; the direct current prevention unit is respectively connected with the main control unit and the energy storage unit and is used for transmitting electric energy to the energy storage unit when receiving the square wave signal transmitted by the main control unit; the energy storage unit is also connected with the control unit and is used for transmitting a conducting signal to the control unit when the stored electric energy reaches a preset voltage; the control unit is also connected with the switch unit and is used for controlling the switch unit to be closed after receiving the conducting signal; the thermoelectric unit is also connected with the switching unit for forming and transmitting current to the external solenoid valve when external heat is sensed and the switching unit is closed. The electromagnetic valve is controlled by accurate and stable driving signals and a safe and effective control mode so as to realize the safe control of the electric appliance.
Description
Technical Field
The utility model belongs to the technical field of electrical apparatus control, especially, relate to a controlling means and electrical apparatus.
Background
In the existing electric appliances (such as an integrated cooker), there are generally the following two control modes of solenoid valves:
(1) the control mode of capacitor discharge is as follows: as shown in fig. 1, the thermocouple is connected with the electromagnetic valve, the electromagnetic valve is connected with the electrolytic capacitor, when the thermocouple senses heat, current is generated, and the coil passes through the current, so that the electromagnetic valve is opened to maintain a pull-in state; when the electromagnetic valve needs to be closed, the electrolytic capacitor releases very large reverse interference current to the coil, and the thermocouple is disconnected (the negative pole of the thermocouple is controlled by a normally closed signal relay), so that the electromagnetic valve is closed when the thermocouple fails to open the electromagnetic valve. However, because the electrolytic capacitor is filled with electrolyte, the life of the electrolytic capacitor is naturally reduced, and the electrolytic capacitor is used for a long time and even has explosion risk, so that the capacitor discharge control mode is adopted, and great potential safety hazard exists.
(2) High-low level control mode: as shown in fig. 2, at a high level, the relay is energized to turn on the switch, and the thermocouple controls the solenoid valve to open, and at a low level, the relay is de-energized to turn off the switch, so that the thermocouple cannot form a loop, and the solenoid valve is closed. However, if the control signal is a continuous high level or a continuous low level, effective control of the solenoid valve cannot be realized, and if a high level or a low level signal is generated due to misjudgment, the solenoid valve is controlled by mistake, and further an electrical appliance is controlled by mistake, so that a potential safety hazard is caused, and the reliability is very low.
Therefore, the electromagnetic valve is controlled by an accurate and stable driving signal and a safe and effective control mode to realize the safe control of the electric appliance, which is a problem to be solved urgently in the field.
SUMMERY OF THE UTILITY MODEL
The utility model provides a controlling means and electrical apparatus aims at solving through accurate stable drive signal and safe effective control mode control solenoid valve to the realization is to the safety control's of electrical apparatus problem.
The utility model is realized in such a way that a control device comprises a main control unit, a direct current prevention unit, an energy storage unit, a control unit, a switch unit and a thermoelectric unit;
the direct current prevention unit is respectively connected with the main control unit and the energy storage unit and is used for transmitting electric energy to the energy storage unit when receiving square wave signals transmitted by the main control unit;
the energy storage unit is also mutually connected with the control unit and used for transmitting a conducting signal to the control unit when the stored electric energy reaches a preset voltage;
the control unit is also connected with the switch unit and used for controlling the switch unit to be closed after the conduction signal is received;
the thermoelectric unit is also connected with the switch unit and is used for forming and transmitting current to an external electromagnetic valve when external heat is sensed and the switch unit is closed.
Still further, the switch unit includes a switch connected to the thermoelectric unit, a relay disposed adjacent to the relay, the relay connected to the control unit, and a first diode connected to the relay.
Furthermore, the energy storage unit is a first capacitor, and the first capacitor is respectively connected with the direct current prevention unit and the control unit.
Furthermore, the direct current prevention unit is a second capacitor, one end of the second capacitor is connected with the main control unit, and the other end of the second capacitor is respectively connected with the first capacitor and the control unit.
Furthermore, the control device further comprises a protection unit connected with the first capacitor for clamping the first capacitor.
Furthermore, the protection unit is a second diode, an anode of the second diode is connected to one end of the first capacitor and the second capacitor, respectively, and a cathode of the second diode is connected to the other end of the first capacitor.
Furthermore, the control unit comprises a triode, a first resistor and a second resistor, wherein the base of the triode is connected with one end of the first resistor, the emitter of the triode is respectively connected with one end of the second resistor, the first capacitor and the grounding end, the collector of the triode is connected with the relay, and the other end of the first resistor is respectively connected with the other end of the second resistor, the first capacitor and the second capacitor.
Further, the thermoelectric unit is a thermocouple, and the thermocouple is connected with the switch.
The utility model also provides an electrical apparatus, including the load unit and controlling means, the load unit is equipped with the solenoid valve, thermoelectric unit with the switch unit all connects the solenoid valve.
Still further, the load unit is an integrated cooker.
The utility model provides a controlling means and electrical apparatus adopt square wave signal to charge for the energy storage unit as drive signal, through the break-make of the indirect control outside solenoid valve of control switch unit, in case controlling means circuit or drive signal are unusual, can control the disconnection of outside solenoid valve immediately, and then with the disconnection of controlled electrical apparatus, guaranteed electrical apparatus safety from this, through accurate stable drive signal and safe effective control mode control solenoid valve, realized the safety control to electrical apparatus.
Drawings
FIG. 1 is a schematic diagram of capacitive discharge control employed by an integrated cooker in the prior art;
FIG. 2 is a schematic diagram of high and low level control used in an integrated cooker in the prior art;
fig. 3 is a block diagram of a control device according to a first embodiment of the present invention;
fig. 4 is a circuit diagram of a control device according to second to eighth embodiments of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the utility model provides a controlling means and electrical apparatus, the main control unit produces regular square wave signal, when receiving the square wave signal that the main control unit transmitted, prevents that direct current unit from transmitting the electric energy to the energy storage unit; when the stored electric energy of the energy storage unit reaches a preset voltage, the control unit controls the switch unit to be closed; when the thermoelectric unit senses external heat and the switching unit is closed, a current is formed and transmitted to the external solenoid valve, and the external solenoid valve is opened. The square wave signal is used as a driving signal to charge the energy storage unit, the on-off of the external electromagnetic valve is indirectly controlled by the control switch unit, once the circuit of the control device or the driving signal is abnormal, the external electromagnetic valve can be immediately controlled to be switched off, and then the controlled electric appliance is switched off, so that the safety of the electric appliance is ensured, the electromagnetic valve is controlled by the accurate and stable driving signal and a safe and effective control mode, and the safety control of the electric appliance is realized.
Example one
As shown in fig. 3, the present embodiment provides a control device, which includes a main control unit 1, a direct current prevention unit 2, an energy storage unit 3, a control unit 4, a switch unit 5, and a thermoelectric unit 6;
the direct current prevention unit 2 is respectively connected with the main control unit 1 and the energy storage unit 3 and is used for transmitting electric energy to the energy storage unit 3 when receiving the square wave signal transmitted by the main control unit 1;
the energy storage unit 3 is also connected with the control unit 4 and is used for transmitting a conducting signal to the control unit 4 when the stored electric energy reaches a preset voltage;
the control unit 4 is also connected with the switch unit 5 and is used for controlling the switch unit 5 to be closed after receiving the conducting signal;
the thermoelectric unit 6 is also connected to the switching unit 5 for forming and transmitting a current to the external solenoid valve when external heat is sensed and the switching unit 5 is closed.
The working principle of the control device is as follows:
the main control unit generates regular square wave signals, and when the square wave signals transmitted by the main control unit are received, the direct current prevention unit transmits electric energy to the energy storage unit; when the stored electric energy of the energy storage unit reaches a preset voltage, transmitting a conduction signal to the control unit; when the control unit receives the conducting signal, the switch unit is controlled to be closed; when the thermoelectric unit senses external heat and the switching unit is closed, a current is formed and transmitted to the external solenoid valve, and the external solenoid valve is opened.
For example, the main control unit 1 may be a single chip, and the preset voltage may be 0.7V.
It is to be understood that the control device of the present embodiment can be applied to both timing control and manual control. When the timing control circuit is applied to timing control, the main control unit generates a square wave signal within a set time period (such as one hour), the direct current prevention unit receives the square wave signal transmitted by the main control unit and transmits electric energy to the energy storage unit, when the electric energy stored by the energy storage unit reaches a preset voltage, a conduction signal is transmitted to the control unit, the control unit controls the switch unit to be closed, when the thermoelectric unit senses external heat, current flowing from a negative electrode to a positive electrode is generated, the switch unit is closed at the moment, the current is formed and transmitted to the external electromagnetic valve, the external electromagnetic valve is opened, when the single chip microcomputer does not generate the square wave signal, the switch unit is opened, the electromagnetic valve is closed accordingly, when the electric appliance needs to be closed at regular time, the electromagnetic valve can be directly disconnected in a timing. When the electromagnetic valve is applied to manual control, the electromagnetic valve is in an open state based on the principle, a user manually presses the switch unit, the switch unit is directly disconnected, the external electromagnetic valve is also disconnected, when the electric appliance needs to be temporarily closed, the electromagnetic valve can be directly disconnected in a manual control mode, safety and reliability are realized, and misoperation is avoided.
In the embodiment, the square wave signal is used as the driving signal to charge the energy storage unit, the on-off of the external electromagnetic valve is indirectly controlled by the control switch unit, once the circuit of the control device or the driving signal is abnormal, the external electromagnetic valve can be immediately controlled to be switched off, and then the controlled electric appliance is switched off, so that the safety of the electric appliance is ensured, the electromagnetic valve is controlled by the accurate and stable driving signal and a safe and effective control mode, and the safety control of the electric appliance is realized.
Example two
The present embodiment provides a control device, as shown in fig. 4, based on the first embodiment, wherein the switch unit 5 includes a switch K1, a relay and a first diode D2, the switch K1 is connected to the thermoelectric unit 6, the relay is disposed adjacent to the relay, the relay is connected to the control unit 4, and the first diode D2 is connected to the relay.
In this embodiment, the first diode D2 is a freewheeling diode connected in parallel to both ends of the relay coil, and when current passes through the coil, induced electromotive force is generated at both ends thereof, when the current disappears, the induced electromotive force will generate reverse voltage to the elements in the circuit, and when the reverse voltage is higher than the reverse breakdown voltage of the elements, the elements will be damaged.
EXAMPLE III
In the present embodiment, on the basis of the second embodiment, the energy storage unit 3 is a first capacitor C2, and the first capacitor C2 is connected to the dc preventing unit 2 and the control unit 4, respectively.
In this embodiment, the first capacitor C2 is an energy storage capacitor, and when receiving the square wave signal transmitted by the main control unit, the dc unit is prevented from transmitting the electric energy to the first capacitor C2, the first capacitor C2 starts to store energy, and when the electric energy stored in the first capacitor C2 reaches a preset voltage (e.g., 0.7V), the control unit controls the switch unit to be closed; when the thermoelectric unit senses external heat and the switching unit is closed, a current is formed and transmitted to the external solenoid valve, and the external solenoid valve is opened.
Example four
In the third embodiment, the dc preventing unit 2 is a second capacitor C1, one end of the second capacitor C1 is connected to the main control unit 1, and the other end of the second capacitor C1 is connected to the first capacitor C2 and the control unit 4, respectively.
In this embodiment, since the capacitor has a characteristic of blocking direct current from passing through alternating current, the second capacitor C1 is used as a direct current prevention unit in this embodiment to prevent direct current from passing through, but only allow regular square wave signals to pass through, so as to remove direct current components.
EXAMPLE five
The present embodiment provides a control apparatus, which further includes a protection unit 7 on the basis of the fourth embodiment, wherein the protection unit 7 is connected to the first capacitor C2 for clamping the first capacitor C2.
In this embodiment, the protection unit 7 is additionally provided, and the potential is clamped by using the characteristic that the voltage at two ends of the capacitor cannot change suddenly, so that the potential at the point can be effectively prevented from changing suddenly.
EXAMPLE six
In the fifth embodiment, the protection unit 7 is a second diode D1, an anode of the second diode D1 is connected to one end of the first capacitor C2 and the second capacitor C1, and a cathode of the second diode D1 is connected to the other end of the first capacitor C2.
In this embodiment, when the instantaneous peak value of the voltage output by the main control unit 1 is very large, the second diode D1 is turned on to direct the voltage to the ground terminal, so as to prevent the first capacitor C2 from being burned out, and in addition, when the voltage output by the main control unit 1 exceeds the preset voltage, the second diode D1 can also direct the part of the voltage exceeding the preset voltage to the ground terminal, so as to maintain the voltage stability of the circuit, thereby playing a role of protection.
EXAMPLE seven
In the fifth or sixth embodiment, the control unit 4 includes a transistor Q1, a first resistor R3, and a second resistor R2, a base of the transistor Q1 is connected to one end of the first resistor R3, an emitter of the transistor Q1 is connected to one end of the second resistor R2, the first capacitor C2, and a ground terminal, a collector of the transistor Q1 is connected to the relay, and another end of the first resistor R3 is connected to another end of the second resistor R2, the first capacitor C2, and the second capacitor C1.
In this embodiment, the first resistor R3 is a current limiting resistor for limiting a current in the circuit to prevent the transistor Q1 from being burned out due to an excessive current, and the second resistor R2 is a protection resistor for dividing a voltage in the circuit. When receiving the square wave signal transmitted by the main control unit 1, the direct current prevention unit 2 transmits the electric energy to the first capacitor C2; when the stored electric energy of the first capacitor C2 reaches a preset voltage, the triode Q1 is conducted, the relay is electrified, and the switch K1 is closed; when the thermoelectric unit 6 senses external heat and the switch K1 is closed, current is established and transmitted to the external solenoid valve, which is opened. When the main control unit 1 does not generate the square wave signal any more, the transistor Q1 is turned off, the switch K1 is turned off, and the solenoid valve is also turned off.
Example eight
The present embodiment provides a control device, in addition to the seventh embodiment, the thermoelectric unit 6 is a thermocouple, and the thermocouple is connected to the switch K1.
Wherein, the probe of the thermocouple is arranged at the ignition position of the integrated cooker.
In this embodiment, adopt the thermocouple as thermoelectric unit 6, can direct measurement temperature, need not external power supply, it is very convenient to use, and anti-seismic performance is good, and thermal response time is fast, long service life.
Example nine
The utility model also provides an electrical apparatus, including the controlling means of one to eight arbitrary embodiments of load unit and embodiment, the load unit is equipped with the solenoid valve, and the solenoid valve is all connected to thermoelectric unit 6 and switch unit 5.
This embodiment kind, to the load unit that is equipped with the solenoid valve, be connected with its solenoid valve through thermoelectric unit 6 and switch element 5, the realization is to the effective control of solenoid valve, adopt square wave signal to charge for the energy storage unit as drive signal, the break-make of the solenoid valve of load unit is indirectly controlled through control switch element 5, in case controlling means circuit or drive signal are unusual, then the solenoid valve break-make can't be controlled, electrical apparatus safety has been guaranteed from this, control solenoid valve through accurate stable drive signal and safe effective control mode, the safety control to the load unit that is equipped with the solenoid valve has been realized.
Example ten
The present embodiment provides an electrical apparatus, and on the basis of the ninth embodiment, the load unit is an integrated cooker.
This embodiment kind adopts square wave signal as drive signal to charge for the energy storage unit, through the break-make of the solenoid valve of control switch unit 5 indirect control integrated kitchen, has realized the safety control to integrated kitchen.
To sum up, the embodiment of the utility model provides an among the control device, adopt square wave signal to charge for the energy storage unit as drive signal, through the break-make of the indirect control outside solenoid valve of control switch unit, in case controlling means circuit or drive signal are unusual, can control the disconnection of outside solenoid valve immediately, and then with the disconnection of controlled electrical apparatus, guaranteed electrical apparatus safety from this, through accurate stable drive signal and safe effective control mode control solenoid valve, realized the safety control to electrical apparatus. Furthermore, the two ends of the coil of the relay are connected with the freewheeling diode in parallel, so that the back electromotive force of the relay can be effectively prevented, and the safety of other elements in the circuit is protected. Further, a second capacitor is adopted as a direct current prevention unit to remove a direct current component. Furthermore, the potential of the point is effectively prevented from generating sudden change by adding the protection unit. Furthermore, the thermocouple is used as a thermoelectric unit, so that the temperature can be directly measured, an external power supply is not needed, the use is very convenient, the anti-seismic performance is good, the thermal response time is short, and the service life is long. The embodiment of the utility model provides an electrical apparatus is still provided, adopts square wave signal to charge for the energy storage unit as drive signal, through the break-make of the solenoid valve of the integrated kitchen of the indirect control of control switch unit, has realized the safety control to integrated kitchen.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A control device is characterized by comprising a main control unit, a direct current prevention unit, an energy storage unit, a control unit, a switch unit and a thermoelectric unit;
the direct current prevention unit is respectively connected with the main control unit and the energy storage unit and is used for transmitting electric energy to the energy storage unit when receiving square wave signals transmitted by the main control unit;
the energy storage unit is also mutually connected with the control unit and used for transmitting a conducting signal to the control unit when the stored electric energy reaches a preset voltage;
the control unit is also connected with the switch unit and used for controlling the switch unit to be closed after the conduction signal is received;
the thermoelectric unit is also connected with the switch unit and is used for forming and transmitting current to an external electromagnetic valve when external heat is sensed and the switch unit is closed.
2. The control device of claim 1, wherein the switching unit includes a switch connected to the thermoelectric unit, a relay disposed adjacent to the relay, the relay connected to the control unit, and a first diode connected to the relay.
3. The control device according to claim 2, wherein the energy storage unit is a first capacitor, and the first capacitor is respectively connected with the dc preventing unit and the control unit.
4. The control device according to claim 3, wherein the dc preventing unit is a second capacitor, one end of the second capacitor is connected to the main control unit, and the other end of the second capacitor is connected to the first capacitor and the control unit, respectively.
5. The control device of claim 4, further comprising a protection unit connected to the first capacitor for clamping the first capacitor.
6. The control device according to claim 5, wherein the protection unit is a second diode, an anode of the second diode is connected to one end of the first capacitor and the second capacitor, respectively, and a cathode of the second diode is connected to the other end of the first capacitor.
7. The control device according to claim 5 or 6, wherein the control unit comprises a triode, a first resistor and a second resistor, wherein a base of the triode is connected with one end of the first resistor, an emitter of the triode is respectively connected with one end of the second resistor, the first capacitor and a ground terminal, a collector of the triode is connected with the relay, and the other end of the first resistor is respectively connected with the other end of the second resistor, the first capacitor and the second capacitor.
8. The control device of claim 7, wherein the thermoelectric unit is a thermocouple, the thermocouple being connected to the switch.
9. An electrical appliance apparatus, comprising a load unit and a control apparatus according to any one of claims 1 to 8, the load unit being provided with a solenoid valve, the thermoelectric unit and the switching unit being connected to the solenoid valve.
10. The electrical apparatus of claim 9, wherein the load unit is an integrated cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020371989.8U CN211959175U (en) | 2020-03-23 | 2020-03-23 | Control device and electrical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020371989.8U CN211959175U (en) | 2020-03-23 | 2020-03-23 | Control device and electrical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211959175U true CN211959175U (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020371989.8U Active CN211959175U (en) | 2020-03-23 | 2020-03-23 | Control device and electrical apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211959175U (en) |
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2020
- 2020-03-23 CN CN202020371989.8U patent/CN211959175U/en active Active
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