CN216203697U - Electric heating stove - Google Patents
Electric heating stove Download PDFInfo
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- CN216203697U CN216203697U CN202122882075.5U CN202122882075U CN216203697U CN 216203697 U CN216203697 U CN 216203697U CN 202122882075 U CN202122882075 U CN 202122882075U CN 216203697 U CN216203697 U CN 216203697U
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Abstract
The utility model discloses an electric heating stove which comprises a stove body, wherein a power supply module, a main control unit, a temperature detection unit, a heating pipe control unit and a dry burning protection unit are arranged in the stove body, the dry burning protection unit, the temperature detection unit and the heating pipe control unit are all electrically connected with the main control unit, an electric leakage protection unit is arranged in the power supply module, and the main control unit, the temperature detection unit, the heating pipe control unit and the dry burning protection unit are all electrically connected with the power supply module through the electric leakage protection unit, so that hardware support is provided for constant temperature work of the electric heating stove, and the safety of the electric heating stove is improved.
Description
Technical Field
The utility model belongs to the technical field of electric heating stove control, and particularly relates to an electric heating stove.
Background
The common heating mode is natural gas and electric heating, and the laying degree of difficulty of natural gas pipe network is great and the cost is higher, and the natural gas energy of china concentrates on the western and western, north China and northeast area more, and relative shortage, but china's electric wire netting system is very ripe, as long as purchase electric heating equipment just can direct practicality, and current electric heating stove lacks corresponding protection architecture, has the potential safety hazard.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an electric heating stove
The specific scheme is as follows:
the utility model provides an electric heating stove, includes the furnace body, be provided with power module, main control unit, temperature detecting element, heating pipe the control unit and dry combustion method protection unit in the furnace body, wherein, dry combustion method protection unit, temperature detecting element and heating pipe the control unit all with the main control unit electricity is connected, be provided with the earth leakage protection unit in the power module, main control unit, temperature detecting element, heating pipe the control unit and dry combustion method protection unit all through the earth leakage protection unit with the power module electricity is connected.
The dry burning protection unit comprises a water level sensor and an alarm, and the water level sensor and the alarm are both electrically connected with the main control unit.
The temperature detection unit comprises a temperature sensor, the temperature sensor is electrically connected with the main control unit, the heating pipe control unit comprises a heating pipe and a relay control circuit, and the heating pipe is electrically connected with the main control unit through the relay control circuit.
The relay control circuit comprises a driving element, a protection diode, a switching indicator lamp, a current-limiting resistor and a relay, wherein the relay comprises a relay coil, a relay normally-open contact and a relay switching end, one end of a heating pipe is electrically connected with the relay normally-open contact, the other end of the heating pipe is electrically connected with the relay switching end, the two ends of the relay coil are connected in parallel with the protection diode, the two ends of the protection diode are connected in parallel with the switching indicator lamp and the current-limiting resistor, the switching indicator lamp is connected with the current-limiting resistor in series, the relay coil is further electrically connected with the main control unit through the driving element, and the driving element is a driving triode or ULN 2003A.
The furnace body is also provided with a display screen and a key module, the display screen and the key module are both electrically connected with the main control unit, the display screen is a liquid crystal display screen, and the key module comprises at least four key switches.
The master control unit comprises a controller and a clock circuit, the clock circuit is electrically connected with the controller, the clock circuit comprises a clock chip, a crystal oscillator and a pull-down resistor, the crystal oscillator is electrically connected with the clock chip, the clock chip is electrically connected with the controller through the pull-down resistor, and the controller is a single chip microcomputer.
The power module comprises a power module, a power leakage protection unit, a first voltage conversion unit and a second voltage conversion unit, wherein the power leakage protection unit is a power leakage protector, the power leakage protector is electrically connected with the first voltage conversion unit, the first voltage conversion unit is electrically connected with the second voltage conversion unit, the first voltage conversion unit comprises a bridge rectifier circuit and a switching power supply conversion circuit, and the bridge rectifier circuit is electrically connected with the switching power supply conversion circuit.
The switching power supply conversion circuit comprises a PWM control circuit, a voltage feedback circuit, a switching tube, a transformer and an output rectification circuit, wherein the PWM control circuit is electrically connected with the transformer through the switching tube, the transformer is electrically connected with the output rectification circuit, and the output rectification circuit is electrically connected with the PWM control circuit through the voltage feedback circuit.
The PWM control circuit is a TL control circuit, the voltage feedback circuit is a photoelectric coupler feedback circuit, and the output rectifying circuit is a diode rectifying circuit.
The second voltage conversion unit is a voltage conversion chip of DC 24-DC3.3V.
The utility model discloses an electric heating stove which comprises a temperature detection unit, a heating pipe control unit, an electric leakage protection unit and a dry combustion protection unit, wherein the temperature detection unit and the heating pipe control unit provide hardware support for the electric heating stove to work at constant temperature, the electric leakage protection unit can perform power-off protection when the input current of a power supply module is abnormal, the safety of the electric heating stove is improved, the dry combustion protection unit can detect the water level in the electric heating stove, the hardware support is improved for the warning and reminding of the electric heating stove when the water level is abnormal, and the power supply module adopts a switch power supply to supply power, so that the electric heating stove has the advantages of high conversion efficiency and low power consumption.
Drawings
Fig. 1 is a schematic view of the general structure of the present invention.
Fig. 2 is a schematic diagram of a relay control circuit.
Fig. 3 is a schematic diagram of the structure of the master controller.
Fig. 4 is a schematic diagram of a clock circuit.
Fig. 5 is a schematic structural diagram of the switching power supply circuit.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is obvious that the described embodiments are only a part of the implementations of the present invention, and not all implementations, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any inventive work are within the scope of the present invention.
As shown in fig. 1, an electric heating stove, includes the furnace body, be provided with power module 8, main control unit 12, temperature detecting element 4, heating pipe the control unit 5 and dry combustion method protecting unit 1 in the furnace body, wherein, dry combustion method protecting unit 1, temperature detecting element 4 and heating pipe the control unit 5 all with main control unit 12 electricity is connected, be provided with earth leakage protecting unit 9 in the power module 8, main control unit 12, temperature detecting element 4, heating pipe the control unit 5 and dry combustion method protecting unit 1 all through earth leakage protecting unit 9 with power module 8 electricity is connected.
The dry combustion protection unit 1 comprises a water level sensor 2 and an alarm 3, wherein the water level sensor 2 and the alarm 3 are both electrically connected with a main control unit 12. The water level sensor 2 can convert the water level into a corresponding electric quantity signal in real time. The alarm 3 is preferably an audible and visual alarm, in this embodiment, when the water level sensor 2 detects that the water level in the electric heating furnace is lower than a normal value, an electric signal is sent to the main control unit 12, and after the main control unit 12 receives the electric signal, the main control unit 12 drives the alarm 3 to alarm and drives the heating pipe control unit 5 to act, so that the heating pipe stops heating.
Temperature detecting element 4 includes temperature sensor, temperature sensor with the main control unit 12 electricity is connected, heating pipe control unit includes heating pipe 7 and relay control circuit 6, heating pipe 7 pass through relay control circuit 6 with the main control unit 12 electricity is connected, temperature sensor's model is DS18B20, can gather the temperature in real time.
As shown in fig. 2, the relay control circuit 6 includes a driving element 17, a protection diode 18, a switching indicator lamp 19, a current limiting resistor 20 and a relay 21, the relay 21 includes a relay coil 22, a relay normally open contact 23 and a relay switching terminal 24, one end of the heater tube 7 is electrically connected to the relay normally open contact 23, the other end of the heater tube 7 is electrically connected to the relay switching terminal 24, the protection diode 18 is connected in parallel to two ends of the relay coil 22, the switching indicator lamp 19 and the current limiting resistor 20 are connected in parallel to two ends of the protection diode 18, the switching indicator lamp 19 and the current limiting resistor 20 are connected in series, the relay coil 22 is further electrically connected to the main control unit 12 through the driving element 17, and the driving element 17 is a driving triode or an ULN 2003A.
In the embodiment, the on-state voltage of the relay 21 is 24V, and the type of the relay 21 is preferably HF46/24-HS 1. After the relay coil 22 is electrically conducted, the normally open contact 23 of the relay is in contact conduction with the relay switching end 24, and at the moment, the heating pipe 7 starts to heat. The relay coil 22 is electrically connected after receiving the low level signal transmitted by the driving element 17, and the switching indicator lamp 19 is turned on to indicate that the relay coil 22 is electrically connected at the same time when the driving element 17 transmits the low level signal, and the heating pipe 7 is in a heating state at this time.
In this embodiment, the main control unit 12 stores a temperature threshold, and when the temperature value acquired by the temperature sensor is lower than the normal threshold, the main control unit 12 transmits a low level signal to the relay coil 22 through the driving element 17, so that the relay coil 22 is powered on and conducted, and the electric heating tube 7 starts to heat and raise the temperature;
when the temperature value collected by the temperature sensor is higher than the normal threshold value, the main control unit 12 transmits a high level signal to the relay coil 22 through the driving element 17, so that the relay coil 22 is powered off, at the moment, the normally open contact 23 of the relay is disconnected with the relay switching end 24, and the electric heating pipe 7 stops heating. The temperature sensor and the heating pipe control unit 5 provide hardware support for keeping the temperature of the electric heating furnace constant.
The main control unit 12 includes a controller 15, the controller 15 is preferably a single chip microcomputer, for those skilled in the art, the single chip microcomputer includes a CPU, an arithmetic unit, a read only memory ROM and a random access memory RAM, the temperature threshold is stored in the read only memory ROM, and the arithmetic unit includes an arithmetic logic unit, an accumulator and a register. The arithmetic logic unit is used for carrying out arithmetic or logic operation on the transmitted data, and the input sources are two data which are respectively from an accumulator and a data register. The arithmetic logic unit can complete the operations of adding, subtracting, and, or comparing the two data, and finally store the result in the accumulator. In this embodiment, the technology of comparing the temperature value collected by the main control unit 12 with the temperature threshold value is the prior art.
The furnace body is further provided with a display screen 16 and a key module 14, the display screen 16 and the key module 14 are both electrically connected with the main control unit 12, the display screen 16 is a liquid crystal display screen 16, and the key module 14 comprises at least four key switches. The liquid crystal display 16 shows current temperature, heating state, clock and the fault code of electric heating stove, button module 14 includes four key switch, can carry out regularly setting, increase the temperature, subtract temperature operation and clear fault code through key switch.
As shown in fig. 3 to 4, the main control unit 12 includes a controller 15 and a clock circuit 13, the clock circuit 13 is electrically connected to the controller 15, the clock circuit 13 includes a clock chip 26, a crystal oscillator 25 and a pull-down resistor 27, the crystal oscillator 25 is electrically connected to the clock chip 26, the clock chip 26 is electrically connected to the controller 15 through the pull-down resistor 27, and the controller 15 is a single chip microcomputer. The single chip microcomputer is preferably SCT80S16B, the type of the clock chip 26 is preferably HT1381, and the clock chip provides a timing reference for the electric heating stove.
The earth leakage protection unit 9 is an earth leakage protector, the earth leakage protector judges whether the earth leakage exists through the change of the detection current, and if the earth leakage exists, the earth leakage protector acts to cut off the power supply so as to protect the electric heating stove.
The power supply module 8 further includes a first voltage conversion unit 10 and a second voltage conversion unit 11, the earth leakage protector is electrically connected to the first voltage conversion unit 10, the first voltage conversion unit 10 is electrically connected to the second voltage conversion unit 11, wherein the first voltage conversion unit 10 includes a bridge rectifier circuit and a switching power supply conversion circuit, and the bridge rectifier circuit is electrically connected to the switching power supply conversion circuit.
As shown in fig. 5, the switching power supply conversion circuit includes a PWM control circuit 28, a voltage feedback circuit 29, a switching tube 30, a transformer 31, and an output rectification circuit 32, wherein the PWM control circuit 28 is electrically connected to the transformer 31 through the switching tube 30, the transformer 31 is electrically connected to the output rectification circuit 32, and the output rectification circuit 32 is electrically connected to the PWM control circuit 28 through the voltage feedback circuit 29.
The PWM control circuit 28 is a TL3842 control circuit, the voltage feedback circuit 29 is a photocoupler feedback circuit, and the output rectifying circuit 32 is a diode rectifying circuit.
The PWM control circuit 28 outputs PWM waves to control the on-off of the switching tube 30, when the switching tube 30 is switched on, the transformer 31 acquires energy, when the switching tube 30 is switched off, the transformer 31 transmits the acquired energy to the output rectifying circuit 32 through the secondary coil of the transformer 31 for rectification and output, the voltage feedback circuit 29 acquires a voltage value in the output rectifying circuit 32, and when the output voltage does not reach a preset voltage value, the voltage feedback circuit 29 adjusts the frequency of the PWM waves output in the PWM control circuit 28 through a feedback signal so as to adjust the on-off frequency of the switching tube 30.
The second voltage conversion unit 11 is a voltage conversion chip of DC 24-DC3.3V, and in this embodiment, the voltage conversion chip of the second voltage conversion unit 11 is preferably PW 6206.
The utility model discloses an electric heating stove which comprises a temperature detection unit, a heating pipe control unit, an electric leakage protection unit and a dry combustion protection unit, wherein the temperature detection unit and the heating pipe control unit provide hardware support for the electric heating stove to work at constant temperature, the electric leakage protection unit can perform power-off protection when the input current of a power supply module is abnormal, the safety of the electric heating stove is improved, the dry combustion protection unit can detect the water level in the electric heating stove, the hardware support is improved for the warning and reminding of the electric heating stove when the water level is abnormal, and the power supply module adopts a switch power supply to supply power, so that the electric heating stove has the advantages of high conversion efficiency and low power consumption.
The technical means disclosed in the utility model scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (10)
1. An electric heating stove, includes the furnace body, its characterized in that: be provided with power module (8), main control unit (12), temperature detecting element (4), heating pipe the control unit (5) and dry combustion method protection unit (1) in the furnace body, wherein, dry combustion method protection unit (1), temperature detecting element (4) and heating pipe the control unit (5) all with main control unit (12) electricity is connected, be provided with earth leakage protection unit (9) in power module (8), main control unit (12), temperature detecting element (4), heating pipe the control unit (5) and dry combustion method protection unit (1) all through earth leakage protection unit (9) with power module (8) electricity is connected.
2. An electric heating stove according to claim 1, characterized in that: the dry burning protection unit (1) comprises a water level sensor (2) and an alarm (3), wherein the water level sensor (2) and the alarm (3) are electrically connected with a main control unit (12).
3. An electric heating stove according to claim 1, characterized in that: the temperature detection unit (4) comprises a temperature sensor, the temperature sensor is electrically connected with the main control unit (12), the heating pipe control unit comprises a heating pipe (7) and a relay control circuit (6), and the heating pipe (7) is electrically connected with the main control unit (12) through the relay control circuit (6).
4. An electric heating stove according to claim 3, characterized in that: the relay control circuit (6) comprises a driving element (17), a protection diode (18), a switching indicator lamp (19), a current limiting resistor (20) and a relay (21), the relay (21) comprises a relay coil (22), a relay normally-open contact (23) and a relay switching end (24), one end of a heating pipe (7) is electrically connected with the relay normally-open contact (23), the other end of the heating pipe (7) is electrically connected with the relay switching end (24), the two ends of the relay coil (22) are connected with the protection diode (18) in parallel, the two ends of the protection diode (18) are connected with the switching indicator lamp (19) and the current limiting resistor (20) in parallel, the switching indicator lamp (19) is connected with the current limiting resistor (20) in series, and the relay coil (22) is also electrically connected with the main control unit (12) through the driving element (17), the driving element (17) is a driving triode or ULN 2003A.
5. An electric heating stove according to claim 1, characterized in that: still be provided with display screen (16) and button module (14) on the furnace body, display screen (16) and button module (14) all are connected with main control unit (12) electricity, display screen (16) are liquid crystal display (16), button module (14) include four at least key switch.
6. An electric heating stove according to claim 1, characterized in that: the master control unit (12) includes controller (15) and clock circuit (13), clock circuit (13) and controller (15) electricity are connected, clock circuit (13) include clock chip (26), crystal oscillator (25) and pull-down resistance (27), crystal oscillator (25) with clock chip (26) electricity is connected, clock chip (26) through pull-down resistance (27) with controller (15) electricity is connected, controller (15) are the singlechip.
7. An electric heating stove according to claim 1, characterized in that: the leakage protection unit (9) is a leakage protector, the power module (8) further comprises a first voltage conversion unit (10) and a second voltage conversion unit (11), the leakage protector is electrically connected with the first voltage conversion unit (10), the first voltage conversion unit (10) is electrically connected with the second voltage conversion unit (11), the first voltage conversion unit (10) comprises a bridge rectifier circuit and a switching power supply conversion circuit, and the bridge rectifier circuit is electrically connected with the switching power supply conversion circuit.
8. An electric heating stove according to claim 7, characterized in that: the switching power supply conversion circuit comprises a PWM control circuit (28), a voltage feedback circuit (29), a switching tube (30), a transformer (31) and an output rectifying circuit (32), wherein the PWM control circuit (28) is electrically connected with the transformer (31) through the switching tube (30), the transformer (31) is electrically connected with the output rectifying circuit (32), and the output rectifying circuit (32) is electrically connected with the PWM control circuit (28) through the voltage feedback circuit (29).
9. An electric heating stove according to claim 8, characterized in that: the PWM control circuit (28) is a TL3842 control circuit, the voltage feedback circuit (29) is a photoelectric coupler feedback circuit, and the output rectifying circuit (32) is a diode rectifying circuit.
10. An electric heating stove according to claim 7, characterized in that: the second voltage conversion unit (11) is a voltage conversion chip of DC 24-DC3.3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122882075.5U CN216203697U (en) | 2021-11-23 | 2021-11-23 | Electric heating stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122882075.5U CN216203697U (en) | 2021-11-23 | 2021-11-23 | Electric heating stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216203697U true CN216203697U (en) | 2022-04-05 |
Family
ID=80914424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122882075.5U Active CN216203697U (en) | 2021-11-23 | 2021-11-23 | Electric heating stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216203697U (en) |
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2021
- 2021-11-23 CN CN202122882075.5U patent/CN216203697U/en active Active
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Address after: No. 311, Science Avenue, High-tech Zone, Zhengzhou City, Henan Province, 450000 Patentee after: China Shipbuilding Haiwei High tech Co.,Ltd. Address before: 450001 NO.311, science Avenue, high tech Zone, Zhengzhou City, Henan Province Patentee before: HAIWEI ZHENGZHOU HIGH TECHNOLOGY Co.,Ltd. |