CN204374713U - Water heater electric voltage protection circuit and water heater - Google Patents
Water heater electric voltage protection circuit and water heater Download PDFInfo
- Publication number
- CN204374713U CN204374713U CN201520053486.5U CN201520053486U CN204374713U CN 204374713 U CN204374713 U CN 204374713U CN 201520053486 U CN201520053486 U CN 201520053486U CN 204374713 U CN204374713 U CN 204374713U
- Authority
- CN
- China
- Prior art keywords
- voltage
- water heater
- module
- capacitor
- protection circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims description 50
- 238000001514 detection method Methods 0.000 claims description 35
- 238000004804 winding Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000005070 sampling Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
Landscapes
- Cookers (AREA)
Abstract
The utility model discloses a kind of Water heater electric voltage protection circuit, Water heater electric voltage protection circuit comprise for control water heater heating power control module, for control power control module work control chip, for detecting the voltage detecting circuit of power supply voltage; Wherein, the output terminal of described voltage detecting circuit is connected with described control chip, described control chip controls to output control signals to described power control module according to the voltage swing that described voltage detecting circuit detects, and controls the power of described water heater heating for described power control module.The invention also discloses a kind of water heater.The utility model improves the stability of water heater working, extends the serviceable life of water heater.
Description
Technical Field
The utility model relates to a heating control technical field especially relates to water heater voltage protection circuit and water heater.
Background
As is known, the water heater in the prior art is not usually provided with voltage protection, and in a region with unstable partial voltage, the water heater is easily damaged by voltage fluctuation, for example, when the voltage is too high, P is V/R according to ampere definition, while the resistance R of a heating device in the water heater is fixed, when the voltage V is too high, the power is greatly increased, which results in too high power, and live parts flowing through large current, especially some connectors, are easily heated too high to cause fire. The other is that when the voltage is too low, for some water heaters which control the heating device through a relay, the voltage at the control end of the relay is also reduced, so that the relay cannot be effectively attracted due to too small electromagnetic force, and the phenomena of frequent attraction and flicking of electric shock easily occur, thereby influencing the service life of the relay and further causing arcing and fire hazard. Therefore, a water heater operating in an unstable voltage condition is easily damaged.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a water heater voltage protection circuit and water heater aims at improving the stability of water heater work, prolongs the life of water heater.
In order to achieve the above object, the present invention provides a water heater voltage protection circuit, which comprises a power control module for controlling heating of a water heater, a control chip for controlling operation of the power control module, and a voltage detection circuit for detecting voltage of a power supply; wherein,
the output end of the voltage detection circuit is connected with the control chip, and the control chip controls and outputs a control signal to the power control module according to the voltage detected by the voltage detection circuit so as to control the heating power of the water heater by the power control module.
Preferably, the voltage detection circuit includes a rectification module for rectifying the power supply and a voltage detection module for sampling a voltage output by the rectification module.
Preferably, the water heater voltage protection circuit further comprises a voltage conversion module, and the voltage conversion module is configured to convert the voltage of the power supply into a preset voltage, so that the control chip and the power control module provide a working voltage.
Preferably, the voltage protection circuit of the water heater further comprises a transformer, a primary winding of the transformer is connected with an input end of the power supply, and a secondary winding of the transformer is connected with the voltage conversion module so as to reduce the voltage of the power supply and output the reduced voltage to the voltage conversion module for voltage conversion.
Preferably, the input end of the rectification module is connected with the input end of the power supply; the voltage detection module comprises a first capacitor, a second capacitor, a first resistor and a second resistor; the positive electrode of the first capacitor is connected with the output end of the rectifying module, and the negative electrode of the first capacitor is connected with the ground end; the second capacitor is connected with the first capacitor in parallel; one end of the first resistor is connected with the anode of the first capacitor, and the other end of the first resistor is connected with the grounding end through the second resistor.
Preferably, the input end of the rectifying module is connected with the output end of the secondary winding; the voltage detection module comprises a first capacitor, a second capacitor, a first resistor and a second resistor; the positive electrode of the first capacitor is connected with the output end of the rectifying module, and the negative electrode of the first capacitor is connected with the ground end; the second capacitor is connected with the first capacitor in parallel; one end of the first resistor is connected with the anode of the first capacitor, and the other end of the first resistor is connected with the grounding end through the second resistor.
Preferably, the rectifying module comprises a first diode, an anode of the first diode is connected with the first output end of the secondary winding, and a cathode of the first diode is connected with the anode of the first capacitor.
Preferably, the rectifier module further includes a second diode, an anode of the second diode is connected to the second output end of the secondary winding, and a cathode of the second diode is connected to the anode of the first capacitor.
Preferably, the water heater voltage protection circuit further comprises a display module, and when the control chip detects that the power supply voltage does not belong to a preset interval according to the voltage detection circuit, the control chip outputs a control signal to the display module so that the display module can display corresponding prompt information.
In addition, in order to achieve the above object, the present invention further provides a water heater, which comprises a water heater voltage protection circuit, wherein the water heater voltage protection circuit comprises a power control module for controlling heating of the water heater, a control chip for controlling the power control module to work, and a voltage detection circuit for detecting voltage of a power supply; wherein,
the output end of the voltage detection circuit is connected with the control chip, and the control chip controls and outputs a control signal to the power control module according to the voltage detected by the voltage detection circuit so as to control the heating power of the water heater by the power control module.
The utility model provides a water heater voltage protection circuit and water heater are through setting up the size that voltage detection circuit detected power supply voltage to according to this power supply voltage's big or small output control signal to heating module, with the power of control heating module work, thereby improved the stability of water heater work, prevent because the long-term work of water heater causes the water heater to damage under the unstable state of power supply voltage, consequently prolonged the life of water heater.
Drawings
Fig. 1 is a schematic circuit structure diagram of a first embodiment of the water heater voltage protection circuit of the present invention;
fig. 2 is a schematic circuit structure diagram of a second embodiment of the water heater voltage protection circuit of the present invention;
fig. 3 is a schematic circuit structure diagram of a third embodiment of the water heater voltage protection circuit of the present invention;
fig. 4 is a schematic circuit diagram of a fourth embodiment of the water heater voltage protection circuit of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
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 utility model provides a water heater voltage protection circuit, refer to fig. 1, in the first embodiment, this water heater voltage protection circuit includes power control module 10 used for controlling the water heater heating, control chip 20 used for controlling the work of power control module 10, voltage detection circuit 30 used for detecting the power supply voltage; wherein,
the output end of the voltage detection circuit 30 is connected to the control chip 20, and the control chip 20 controls to output a control signal to the power control module 10 according to the voltage detected by the voltage detection circuit 30, so that the power control module 10 controls the heating power of the water heater.
The voltage protection circuit of the water heater is mainly applied to heating control of the water heater, the electric water heater of the water heater is provided with a heating module, and the power control module 10 is used for controlling the working power of the heating module; the power supply is commercial power (namely 220V alternating current).
The embodiment of the utility model provides an in, when normal work, through control chip 20 output control signal to power control module 10, work according to the heating power that presets by power control module 10 control heating module. At this time, the voltage of the power supply is detected in real time by the voltage detection circuit 30, when the power supply voltage is abnormal (for example, when the voltage is too high or too low, specifically, it can be determined whether the voltage is too high or too low by setting a preset value), the control chip 20 outputs a control signal value to the power control module 10, and the operating voltage of the heating module is adjusted by the power control module 10, for example, the heating module can be directly controlled to stop working, that is, to operate at zero power.
The embodiment of the utility model provides a, detect power supply voltage's size through setting up voltage detection circuit 30 to according to this power supply voltage's big or small output control signal to heating module, with the power of control heating module work, thereby improved the stability of water heater work, prevent because the water heater works for a long time under the unstable state of power supply voltage, cause the water heater to damage, consequently prolonged the life of water heater.
Specifically, the structure of the voltage detection circuit 30 can be set according to actual needs. In the second embodiment, the voltage detection circuit 30 includes a rectifying module 31 for rectifying the power supply and a voltage detection module 32 for sampling the voltage output by the rectifying module 31.
In this embodiment, the power supply is an ac power supply, and the rectification module 31 may be half-wave rectification or full-wave rectification. The structure of the voltage sampling circuit may be set according to actual needs, and is not further limited herein.
It should be noted that the power control module 10 and the control chip 20 may be powered by an external power source, or by voltage conversion of the power supply. Based on the second embodiment, in the third embodiment, preferably, the water heater voltage protection circuit further includes a voltage conversion module 40, where the voltage conversion module 40 is configured to convert the voltage of the power supply into a preset voltage, so as to provide an operating voltage for the control chip 20 and the power control module 30.
In this embodiment, the preset voltage is a dc voltage.
Specifically, the voltage protection circuit for the water heater further includes a transformer 50, a primary winding of the transformer 50 is connected to an input end of the power supply, and a secondary winding of the transformer 50 is connected to the voltage conversion module 40, so as to reduce the voltage of the power supply and output the reduced voltage to the voltage conversion module 40 for voltage conversion.
It should be noted that the voltage detection circuit 30 is used to detect the magnitude of the power supply voltage, the specific detection position can be set according to actual needs, and the following two embodiments are described in detail by different detection positions.
As shown in fig. 2, based on the third embodiment, the detection of the power supply voltage can be realized by detecting the voltage across the primary winding of the transformer 50 in the fourth embodiment. Specifically, in this embodiment, the input end of the rectifying module 31 is connected to the input end of the power supply; the voltage detection module 32 comprises a first capacitor C1, a second capacitor C2, a first resistor R1 and a second resistor R2; the positive electrode of the first capacitor C1 is connected with the output end of the rectifier module 31, and the negative electrode is connected with the ground end; a second capacitor C2 is connected in parallel with the first capacitor C1; one end of the first resistor R1 is connected to the positive electrode of the first capacitor C1, and the other end is connected to the ground terminal through the second resistor R2.
As shown in fig. 3 and 4, based on the above-described third embodiment, the detection of the power supply voltage can be realized by detecting the voltage across the secondary winding of the transformer 50 in the fifth embodiment. Specifically, in this embodiment, the input end of the rectifying module 31 is connected to the output end of the secondary winding; the voltage detection module 32 comprises a first capacitor C1, a second capacitor C2, a first resistor R1 and a second resistor R2; the positive electrode of the first capacitor C1 is connected with the output end of the rectifier module 31, and the negative electrode is connected with the ground end; a second capacitor C2 is connected in parallel with the first capacitor C1; one end of the first resistor R1 is connected to the positive electrode of the first capacitor C1, and the other end is connected to the ground terminal through the second resistor R2.
The first capacitor C1 is a polar capacitor for storing energy and smoothing the output voltage; the second capacitor C2 is a non-polar capacitor for filtering. The first resistor R1 and the second resistor R2 may be one resistor, or may be a combined resistor formed by connecting a plurality of resistors.
Further, referring to fig. 3, based on the fifth embodiment, in the sixth embodiment, the rectifying module 31 includes a first diode, an anode of the first diode is connected to the first output terminal of the secondary winding, and a cathode of the first diode is connected to the anode of the first capacitor C1.
In this embodiment, a diode is adopted to realize half-wave rectification, the voltage on the secondary winding of the transformer 50 is output to the two ends of the first resistor R1 and the second resistor R2 for voltage division after the half-wave rectification, so that the voltage of the power supply is determined according to the voltage at the two ends of the second resistor R2, and the voltage of the secondary winding of the transformer 50 is rectified and then sampled by the rectification module 31, thereby effectively reducing the withstand voltage requirement on components in the rectification module 31, and further reducing the difficulty and cost of circuit design.
It is understood that in other embodiments, the rectification of the alternating current may be achieved by full-wave rectification. Referring to fig. 4, specifically, based on the sixth embodiment, in the seventh embodiment, the rectifier module 31 further includes a second diode, an anode of the second diode is connected to the second output terminal of the secondary winding, and a cathode of the second diode is connected to the anode of the first capacitor C1.
In this embodiment, the first end and the second end are two ends of the same secondary winding.
Further, based on any of the above embodiments, in this embodiment, the water heater voltage protection circuit further includes a display module 60, and when the control chip 20 detects that the power supply voltage does not belong to the preset interval according to the voltage detection circuit 30, the control chip outputs a control signal to the display module 60, so that the display module 60 displays corresponding prompt information.
In this embodiment, the display module 60 may be a display screen and a corresponding display circuit, or may be a display. The size of the preset interval can be set according to actual needs, and is not further limited herein.
The utility model also provides a water heater, this water heater include water heater voltage protection circuit, and above-mentioned embodiment can be referred to this water heater voltage protection circuit's structure, no longer gives unnecessary details here. It should be understood that, because the water heater of this embodiment adopts the technical scheme of the above-mentioned water heater voltage protection circuit, this water heater has all beneficial effects of above-mentioned water heater voltage protection circuit.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A voltage protection circuit of a water heater is characterized by comprising a power control module for controlling heating of the water heater, a control chip for controlling the power control module to work and a voltage detection circuit for detecting the voltage of a power supply; wherein,
the output end of the voltage detection circuit is connected with the control chip, and the control chip controls and outputs a control signal to the power control module according to the voltage detected by the voltage detection circuit so as to control the heating power of the water heater by the power control module.
2. The water heater voltage protection circuit as claimed in claim 1, wherein said voltage detection circuit comprises a rectification module for rectifying said power supply and a voltage detection module for voltage sampling of a voltage output by said rectification module.
3. The water heater voltage protection circuit as claimed in claim 2, further comprising a voltage conversion module for converting the voltage of the power supply into a preset voltage for providing an operating voltage for the control chip and the power control module.
4. The water heater voltage protection circuit of claim 3, further comprising a transformer, wherein a primary winding of the transformer is connected to the input terminal of the power supply, and a secondary winding of the transformer is connected to the voltage conversion module, so as to step down the voltage of the power supply and output the voltage to the voltage conversion module for voltage conversion.
5. The water heater voltage protection circuit according to any one of claims 3 or 4, wherein an input terminal of the rectifying module is connected to an input terminal of the power supply; the voltage detection module comprises a first capacitor, a second capacitor, a first resistor and a second resistor; the positive electrode of the first capacitor is connected with the output end of the rectifying module, and the negative electrode of the first capacitor is connected with the ground end; the second capacitor is connected with the first capacitor in parallel; one end of the first resistor is connected with the anode of the first capacitor, and the other end of the first resistor is connected with the grounding end through the second resistor.
6. The water heater voltage protection circuit of claim 4, wherein an input of said rectifier module is connected to an output of said secondary winding; the voltage detection module comprises a first capacitor, a second capacitor, a first resistor and a second resistor; the positive electrode of the first capacitor is connected with the output end of the rectifying module, and the negative electrode of the first capacitor is connected with the ground end; the second capacitor is connected with the first capacitor in parallel; one end of the first resistor is connected with the anode of the first capacitor, and the other end of the first resistor is connected with the grounding end through the second resistor.
7. The water heater voltage protection circuit of claim 6, wherein said rectifier module includes a first diode having an anode connected to said first output terminal of said secondary winding and a cathode connected to said positive terminal of said first capacitor.
8. The water heater voltage protection circuit as claimed in claim 7, wherein said rectifying module further comprises a second diode, an anode of said second diode being connected to said second output terminal of said secondary winding, and a cathode of said second diode being connected to an anode of said first capacitor.
9. The voltage protection circuit of claim 1, further comprising a display module, and when the control chip detects that the power supply voltage does not belong to the preset interval according to the voltage detection circuit, the control chip outputs a control signal to the display module to allow the display module to display corresponding prompt information.
10. A water heater comprising a water heater voltage protection circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520053486.5U CN204374713U (en) | 2015-01-26 | 2015-01-26 | Water heater electric voltage protection circuit and water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520053486.5U CN204374713U (en) | 2015-01-26 | 2015-01-26 | Water heater electric voltage protection circuit and water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204374713U true CN204374713U (en) | 2015-06-03 |
Family
ID=53330917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520053486.5U Active CN204374713U (en) | 2015-01-26 | 2015-01-26 | Water heater electric voltage protection circuit and water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204374713U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570900A (en) * | 2015-01-26 | 2015-04-29 | 芜湖美的厨卫电器制造有限公司 | Voltage protection circuit for water heater and water heater |
-
2015
- 2015-01-26 CN CN201520053486.5U patent/CN204374713U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570900A (en) * | 2015-01-26 | 2015-04-29 | 芜湖美的厨卫电器制造有限公司 | Voltage protection circuit for water heater and water heater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104914293B (en) | Power-fail detection circuit and device | |
| WO2020224303A1 (en) | Air conditioner overvoltage detection circuit, air conditioner electronic control apparatus and air conditioner | |
| CA2947837C (en) | A non-isolated switching mode power supply for a high-voltage light strip | |
| CN205544520U (en) | Automatic energy -conserving charging circuit of pressure regulating | |
| CN201219155Y (en) | Multi-functional power supply socket | |
| CN205453116U (en) | Survival voltage bleeder circuit and electric rice cooker | |
| CN204374713U (en) | Water heater electric voltage protection circuit and water heater | |
| CN104570900B (en) | Water heater electric voltage protection circuit and water heater | |
| CN105471233A (en) | AC power supply transient interruption triggering device | |
| CN203788178U (en) | Power supply circuit for coal mine with super-wide voltage input and output | |
| CN202503439U (en) | Capacitance-resistance voltage reduction circuit of low power supply | |
| CN201118195Y (en) | Live wire and zero line reverse connection automatic correcting device | |
| CN109586397B (en) | Power supply control circuit and electronic equipment | |
| CN107425741B (en) | AC-DC conversion circuit with low-voltage protection | |
| CN202488366U (en) | Energy-saving ultra-small switch power supply for plug and socket with electronic circuit | |
| CN109511187B (en) | Electromagnetic heating device and control circuit and method for reducing standby power consumption of electromagnetic heating device | |
| CN204906187U (en) | Wide region voltage input's power supply circuit | |
| CN205406872U (en) | Overvoltage protection power receptacle | |
| CN204595641U (en) | A kind of high-precision temperature regulating circuit | |
| CN203840223U (en) | Inverter power supply and welding equipment | |
| CN208818776U (en) | Crawler belt detection device | |
| CN203747676U (en) | Switching power supply | |
| CN204633621U (en) | A kind of Switching Power Supply underloading turns off the circuit of synchronous rectification | |
| CN201766341U (en) | Overvoltage protection air switch | |
| CN212210966U (en) | Electronic switch circuit and electronic device applying same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221031 Address after: 241000 west side of 3 / F, No.5 office building, new energy and new materials gathering area, Fuzhou Road, Jiangbei District, Wuhu City, Anhui Province Patentee after: Wuhu Midea intelligent kitchen electricity Manufacturing Co.,Ltd. Address before: 241009 Wan Chun East Road, East Wuhu economic and Technological Development Zone, Wuhu, Anhui Patentee before: WUHU MIDEA KITCHEN AND BATH APPLIANCES MFG. Co.,Ltd. |
|
| TR01 | Transfer of patent right |