CN218446491U - Control circuit of electric hot-water bag - Google Patents
Control circuit of electric hot-water bag Download PDFInfo
- Publication number
- CN218446491U CN218446491U CN202222834855.7U CN202222834855U CN218446491U CN 218446491 U CN218446491 U CN 218446491U CN 202222834855 U CN202222834855 U CN 202222834855U CN 218446491 U CN218446491 U CN 218446491U
- Authority
- CN
- China
- Prior art keywords
- module
- circuit
- switch
- electric hot
- water level
- 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
Images
Landscapes
- Control Of Resistance Heating (AREA)
Abstract
The utility model relates to a control circuit of an electric hot-water bag, which comprises a heating module; the switching circuit is connected in series with the heating module and is connected between the zero line and the live line; the power module is provided with two input ends respectively connected with the zero line and the live line and an output end which is a high level; the method is characterized in that: further comprising: the water level detection module is provided with a touch switch which acts according to the result of detecting the water level in the electric heating bag, and the touch switch is connected with the output end of the power supply module; a control module connected with the water level detection module and the switch circuit and configured to: and controlling the switch circuit to be opened or closed according to the detection result of the water level detection module. The control circuit can effectively prevent the electric hot water bag from being continuously heated due to the fault of the temperature control module, and can also avoid the condition that the electric hot water bag is dried and burned due to heating when the water level of the electric hot water bag is insufficient through the detection of the water level, thereby effectively avoiding the occurrence of safety accidents and ensuring that the electric hot water bag is safer to use.
Description
Technical Field
The utility model relates to a hot-water bottle technical field, in particular to electric hot-water bottle's control circuit.
Background
The electric hot-water bag can be directly used after being heated because a user does not need to inject water, so that the trouble and the insecurity caused by frequent water change of the traditional hot-water bag are avoided, the use is convenient, and the electric hot-water bag is an ideal article for warming hands and feet in winter and is widely applied.
Because the bag body of the electric hot water bag is of a sealed structure, water in the bag body is vaporized in the heating process of the electric hot water bag, so that the pressure in the bag is greatly increased, and if the heating is not turned off in time, the bag body is heated to be over-expanded and is easy to explode. Therefore, the temperature control device is generally arranged in the existing electric hot water bag to control the heating temperature and ensure the heating safety of the electric hot water bag.
Chinese utility model discloses an electric hot-water bag of dual control by temperature change, including the bag body and heating device for patent number ZL200420026827.1 (the grant bulletin number is CN 2704178Y), heating device comprises casing, temperature controller, heating resistor, and the casing divide into interior casing and shell body, and wherein the shell body is as outer power connection, and interior casing setting is in the inner chamber of the bag body, and the inside of casing including two temperature controllers set up, and interior casing is inside to be filled with insulating resin to insulate and fix the temperature controller, and heating resistor settles in the intracavity of the bag body. When the temperature of the electric hot water bag rises to the specified temperature of the temperature controller, the temperature controller is switched off, so that the circuit is switched off, the water temperature does not rise any more, and the use safety is protected; in addition, in order to prevent the influence on the use safety caused by the fault of the temperature controllers, the temperature of the water in the hot water bag can not be increased by arranging the two temperature controllers as long as the two temperature controllers do not simultaneously have faults.
Although the electric hot water bag can be safely heated by the protection of the two temperature controllers, the cost of the electric hot water bag is correspondingly increased by increasing the number of the temperature controllers; in addition, in the actual use process, the possibility that two temperature controllers simultaneously break down still exists, so that the existing electric hot-water bag still has the possibility of continuous heating, and the heating safety of the electric hot-water bag is influenced. Therefore, further improvement on the existing control circuit of the electric hot-water bag is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the first technical problem that to above-mentioned prior art, provide a control circuit that can guarantee electric hot-water bottle heating safety's electric hot-water bottle.
The second technical problem to be solved in the present invention is to provide a control circuit of an electric hot-water bag with simple circuit structure and improved stability.
The utility model provides a technical scheme that above-mentioned first and second technical problem adopted is: a control circuit of an electric hot-water bag comprises
A heating module;
the switching circuit is connected in series with the heating module and is connected between the zero line and the live line;
the power module is provided with two input ends which are respectively connected with a zero line and a live wire and an output end which is a high level;
the method is characterized in that: further comprising:
the water level detection module is provided with a touch switch which acts according to the result of detecting the water level in the electric heating bag, and the touch switch is connected with the output end of the power supply module;
a control module connected with the water level detection module and the switch circuit and configured to: and controlling the switch circuit to be opened or closed according to the detection result of the water level detection module.
There are many ways of controlling the module, wherein the first way of controlling the module is: the control module comprises a controller, and the controller is provided with a first signal acquisition port connected with the water level detection module and a control port connected with the control end of the switch circuit.
In order to make the user clear the temperature in the electric hot water bag, the electric hot water bag further comprises a temperature sensor for detecting the temperature in the electric hot water bag and a display module for displaying the temperature, wherein the temperature sensor and the display module are both connected with the controller.
In order to reduce the cost of the control module, the second mode adopted by the control module is as follows: the control module comprises a first switch device and a voltage division circuit connected with the first switch device, the first switch device and the touch switch are connected between the output end of the power module and the zero line in series, one end of the first switch device is connected with one input end of the voltage division circuit, the other input end of the voltage division circuit is connected with the switch circuit, and the output end of the voltage division circuit is connected with the control end of the switch circuit.
Preferably, the first switching device is a first triode, a base of the first triode is connected with one end of the trigger switch, the other end of the trigger switch is grounded, an emitter of the first triode is connected with the output end of the power supply module, and a collector of the first triode is used as one end of the first switching device connected with one input end of the voltage division circuit.
In order to switch off and on the heating operation of the heating module, the switching circuit preferably includes a thyristor having a first end connected to the live line, a second end connected in series with the heating module, and a third end serving as a control end of the switching circuit.
The third mode adopted by the control module is as follows: the control module comprises a second switch device, the switch circuit comprises a relay with a coil and contacts, the second switch device and the touch switch are connected between the output end of the power supply module and a zero line in series, one end of the second switch device is connected with one end of the coil of the relay, the other end of the coil of the relay is grounded, the contacts of the relay comprise a movable contact, a suspended first fixed contact and a second fixed contact, the movable contact is connected with the heating module in series, the second fixed contact is connected with a live wire, and the contacts of the relay are configured as follows: after the coil of the relay is electrified, the movable contact is communicated with the second fixed contact; and when the coil of the relay is not electrified, the movable contact is communicated with the first fixed contact.
Preferably, the second switching device is a third triode, a base of the third triode is connected with one end of the trigger switch, the other end of the trigger switch is grounded, an emitter of the third triode is connected with the output end of the power supply module, and a collector of the third triode serves as one end of the second switching device connected with one input end of the coil of the relay.
In order to realize the automatic protection of the heating process of the electric hot water bag, the electric hot water bag further comprises a temperature control switch which is connected in series with a branch circuit connected with the switching circuit and the heating module and is configured to: when the temperature in the electric hot water bag does not reach the preset temperature value, the temperature control switch is in a closed state; when the temperature in the electric hot water bag reaches a preset temperature value, the temperature control switch is in an open state.
Preferably, the water level detection module is a water level sensor or a water level sensing probe.
Compared with the prior art, the utility model has the advantages of: the control circuit of the electric hot water bag controls the switch circuit to be switched on or off according to the detection result of the water level detection module, so that the electric hot water bag can be effectively prevented from being continuously heated due to the fault of the temperature control module, safety accidents can be effectively avoided, and the electric hot water bag is safer to use; the water level detection can also avoid the condition that the electric hot water bag is dry-burned due to heating when the water level of the electric hot water bag is insufficient, and can also prevent safety accidents caused by dry burning.
Drawings
FIG. 1 is a circuit diagram of a control circuit of an electric hot-water bag according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a control circuit of the electric hot-water bag according to the second embodiment of the present invention;
fig. 3 is a circuit diagram of a control circuit of the electric hot-water bag in the third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The first embodiment is as follows:
the control circuit of the electric hot-water bag in the embodiment comprises a heating module 1, a switch circuit 2, a power module 3, a water level detection module 4 and a control module 5.
Wherein the heating module 1 is preferably a heating wire RL, as shown in fig. 1; the switching circuit 2 is connected in series with the heating module 1 and is connected between the zero line N and the live line L; the power module 3 has two input ends respectively connected with the zero line N and the live line L and an output end with a high level, and the power module 3 can be commonly used by the existing AC-DC conversion circuit and is used for converting commercial power into 5V direct current; the water level detection module 4 is provided with a touch switch K1 which acts according to the result of detecting the water level in the electric heating bag, and the touch switch K1 is connected with the output end of the power supply module 3; the control module 5 is connected with the water level detection module 4 and the switch circuit 2, and is configured to: and controlling the switch circuit 2 to be opened or closed according to the detection result of the water level detection module 4. In this embodiment, the water level detecting module 4 is a water level sensor or a water level sensing probe.
In this embodiment, the control module 5 includes a controller U1, the controller U1 is an existing single chip microcomputer, and the controller U1 has a first signal collecting port (corresponding to the port 14 in fig. 1) connected to the water level detecting module 4 and a control port (corresponding to the port 13 in fig. 1) connected to the control end of the switch circuit 2.
In addition, P2 in fig. 1 is a plug, wherein the left side (corresponding to the controller U1, the switch circuit 2 and the peripheral circuit thereof) of the plug P2 is a circuit board disposed in the plug P2, and the right side (corresponding to the heating module 1, the water level detection module 4, etc.) of the plug P2 is disposed in an interface in the electric hot water bag, and can be electrically connected through the butt joint of the plug P2, and is also convenient for electrical disconnection.
In this embodiment, switch circuit 2 includes silicon controlled rectifier SCR1 and opto-coupler U2, silicon controlled rectifier SCR1 has the first end of connection on live wire L, the second end of establishing ties mutually with heating module 1 and the third end as switch circuit 2 control end, this silicon controlled rectifier SCR 1's third end is connected with silicon controlled rectifier SCR1, opto-coupler U2's the 1 st end is connected with controller U1, when back-end circuit (heating element, like the heater RL) burns out, opto-coupler U2 can in time break off, thereby prevent that preceding stage circuit U1 from burning out, play the effect of isolation and protect controller U1.
The control circuit of the electric hot water bag also comprises a temperature sensor 6 for detecting the temperature in the electric hot water bag and a display module 7 for displaying the temperature, and the temperature sensor 6 and the display module 7 are both connected with the controller U1. As shown in fig. 1, the temperature sensor 6 in this embodiment is a thermistor, and the display module 7 is the most commonly used led display screen. In addition, the controller U1 is also connected with temperature adjusting buttons S1 and S2 and an alarm indicator light LED1.
In addition, the control circuit of the electric hot-water bag further comprises a temperature control switch 8 connected in series in a branch of the switching circuit 2 and the heating module 1, and is configured to: when the temperature in the electric hot water bag does not reach the preset temperature value, the temperature control switch 8 is in a closed state; when the temperature in the electric hot water bag reaches a preset temperature value, the temperature control switch 8 is in an open state.
The working process of the electric hot-water bag in the embodiment is as follows:
3, the controller U1 sends a signal to the optocoupler U1 to control the silicon controlled rectifier SCR1 to be opened through the optocoupler U1, then the commercial power supplies power to the heating wire RL, the heating wire RL heats, and the temperature in the electric hot water bag is sensed in real time through the temperature control switch 8, when the temperature control switch 8 has no fault, when the temperature in the electric hot water bag reaches a preset temperature value, the temperature control switch 8 is automatically switched off, at the moment, a heating circuit of the heating wire RL is automatically switched off, and then the temperature in the electric hot water bag does not continuously rise any more; on the contrary, when the temperature control switch 8 is failed, when the temperature in the electric hot water bag reaches the preset temperature value, the temperature control switch 8 is still kept in a closed state, at the moment, the heating circuit of the heating wire RL is still continuously heated, the temperature in the electric hot water bag is continuously increased, the water temperature is continuously increased to generate steam, the water level probe is pulled out of the water surface by utilizing the bag body expansion effect of the electric hot water bag, at the moment, the water level probe cannot detect the water level, the controller U1 can send a signal for stopping heating, the controller U1 can be locked after the water level detection program is separated from the water surface for 3 seconds, the heating wire RL is not heated any more, and if the heating is required to be carried out again, the plug needs to be pulled out, and the system heating program can be unlocked by electrifying again.
Therefore, the control circuit of the electric hot water bag controls the switch circuit 2 to be switched on or off according to the detection result of the water level detection module 4, so that the electric hot water bag can be effectively prevented from being continuously heated due to the fault of the temperature control module, safety accidents can be effectively avoided, and the electric hot water bag is safer to use; the water level detection can also avoid the condition that the electric hot water bag is dry-burned due to heating when the water level of the electric hot water bag is insufficient, and can also prevent safety accidents caused by dry burning.
Example two:
as shown in fig. 2, different from the first embodiment, the control module 5 in this embodiment includes a first switch device and a voltage dividing circuit 51 connected to the first switch device, the first switch device and the touch switch K1 are connected in series between the output end of the power module 3 and the zero line N, one end of the first switch device is connected to one input end of the voltage dividing circuit 51, the other input end of the voltage dividing circuit 51 is connected to the switch circuit 2, and the output end of the voltage dividing circuit 51 is connected to the control end of the switch circuit 2.
As shown in fig. 2, the first switching device in this embodiment is a first triode Q1, a base of the first triode Q1 is connected to one end of a trigger switch K1, the other end of the trigger switch K1 is grounded, an emitter of the first triode Q1 is connected to the output end of the power module 3, and a collector of the first triode Q1 is used as one end of the first switching device connected to one input end of the voltage divider circuit 51. Of course, the first switching device may also be another switching device, for example: and (6) silicon controlled rectifier.
The working process of the electric hot-water bag in the embodiment is as follows:
In this embodiment, the first switching device is used to replace the controller U1 in the first embodiment, so that the functions in the first embodiment can be realized.
Example three:
as shown in fig. 3, unlike the first and second embodiments, the control module 5 in the present embodiment includes a second switching device, the switching circuit 2 includes a relay 21 having a coil and a contact, the second switching device is connected in series with the tact switch K1 between the output terminal of the power module 3 and the neutral wire N, one end of the second switching device is connected to one end of the coil RY of the relay 21, the other end of the coil RY of the relay 21 is grounded, and the contact of the relay 21 includes a movable contact K11 connected in series with the heating module 1, a floating first stationary contact K12, and a second stationary contact K13 connected to the live wire L, and is configured to: after the coil RY of the relay 21 is electrified, the movable contact K11 is communicated with the second stationary contact K13; when the coil RY of the relay 21 is not energized, the movable contact K11 communicates with the first stationary contact K12.
As shown in fig. 3, the second switching device is a third triode Q3, a base of the third triode Q3 is connected to one end of the trigger switch K1, the other end of the trigger switch K1 is grounded, an emitter of the third triode Q3 is connected to an output end of the power module 3, and a collector of the third triode Q3 is used as one end of the second switching device connected to one input end of the coil RY of the relay 21.
The working process of the electric hot-water bag in the embodiment is as follows:
step 3, the coil RY of the relay 21 is electrified, namely the movable contact K11 of the relay is communicated with the second fixed contact K13, and the heating wire RL is electrified; the heating wire RL heats, and the temperature in the electric hot water bag is sensed in real time through the temperature control switch 8, when the temperature control switch 8 has no fault, and the temperature in the electric hot water bag reaches a preset temperature value, the temperature control switch 8 is automatically switched off, at the moment, the heating circuit of the heating wire RL is automatically switched off, and the temperature in the electric hot water bag is not increased continuously; on the contrary, when the temperature control switch 8 is out of order, when the temperature in the electric hot water bag reaches the preset temperature value, the temperature control switch 8 is still kept in a closed state, at the moment, the heating circuit of the heating wire RL is still continuously heated, the temperature in the electric hot water bag is continuously raised, as the water temperature is continuously raised to generate steam, the water level probe is pulled out of the water surface by utilizing the bag body expansion effect of the electric hot water bag, at the moment, the touch switch K1 is disconnected, the state of the third triode Q3 is switched from on to off, the coil RY of the relay 21 is de-energized, namely, the heating is interrupted, the heating wire RL is not heated any more, and if the heating is required to be heated again, the plug is required to be pulled out, and the heating program of the system can be unlocked by electrifying again.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A control circuit of an electric hot-water bag comprises
A heating module (1);
the switching circuit (2) is connected in series with the heating module (1) and is connected between the zero line (N) and the live line (L);
the power supply module (3) is provided with two input ends which are respectively connected with a zero line (N) and a live line (L) and an output end which is a high level (+ 5V);
the method is characterized in that: further comprising:
the water level detection module (4) is provided with a touch switch (K1) which acts according to the result of detecting the water level in the electric heating bag, and the touch switch (K1) is connected with the output end of the power supply module (3);
a control module (5) connected with the water level detection module (4) and the switch circuit (2) and configured to: and controlling the switch circuit (2) to be opened or closed according to the detection result of the water level detection module (4).
2. The control circuit of claim 1, wherein: the control module (5) comprises a controller (U1), and the controller (U1) is provided with a first signal acquisition port connected with the water level detection module (4) and a control port connected with the control end of the switch circuit (2).
3. The control circuit of claim 2, wherein: the electric heating water bag is characterized by further comprising a temperature sensor (6) for detecting the temperature in the electric heating water bag and a display module (7) for displaying the temperature, wherein the temperature sensor (6) and the display module (7) are connected with the controller (U1).
4. The control circuit of claim 1, wherein: the control module (5) comprises a first switch device and a voltage division circuit (51) connected with the first switch device, the first switch device and the touch switch (K1) are connected between the output end of the power supply module (3) and a zero line (N) in series, one end of the first switch device is connected with one input end of the voltage division circuit (51), the other input end of the voltage division circuit (51) is connected with the switch circuit (2), and the output end of the voltage division circuit (51) is connected with the control end of the switch circuit (2).
5. The control circuit of claim 4, wherein: the first switching device is a first triode (Q1), the base of the first triode (Q1) is connected with one end of a touch switch (K1), the other end of the touch switch (K1) is grounded, the emitting electrode of the first triode (Q1) is connected with the output end of the power module (3), and the collecting electrode of the first triode (Q1) serves as one end of the first switching device, which is connected with one input end of the voltage division circuit (51).
6. The control circuit according to any one of claims 2 to 5, wherein: the switching circuit (2) comprises a silicon controlled rectifier (SCR 1), and the silicon controlled rectifier (SCR 1) is provided with a first end connected to a live wire (L), a second end connected with the heating module (1) in series and a third end serving as a control end of the switching circuit (2).
7. The control circuit of claim 1, wherein: the control module (5) comprises a second switching device, the switching circuit (2) comprises a relay (21) with a coil and a contact, the second switching device and the trigger switch (K1) are connected in series between the output end of the power supply module (3) and the zero line (N), one end of the second switching device is connected with one end of the coil (RY) of the relay (21), the other end of the coil (RY) of the relay (21) is grounded, the contact of the relay (21) comprises a movable contact (K11) connected with the heating module (1) in series, a suspended first stationary contact (K12) and a second stationary contact (K13) connected with the live wire (L), and the second switching device is configured to: after the coil (RY) of the relay (21) is electrified, the movable contact (K11) is communicated with the second fixed contact (K13); when the coil (RY) of the relay (21) is not electrified, the movable contact (K11) is communicated with the first fixed contact (K12).
8. The control circuit of claim 7, wherein: the second switching device is a third triode (Q3), the base of the third triode (Q3) is connected with one end of the trigger switch (K1), the other end of the trigger switch (K1) is grounded, the emitting electrode of the third triode (Q3) is connected with the output end of the power supply module (3), and the collecting electrode of the third triode (Q3) serves as one end of the second switching device, which is connected with one input end of the coil (RY) of the relay (21).
9. The control circuit of claim 1, wherein: further comprising a temperature-dependent switch (8) connected in series in a branch connecting the switching circuit (2) and the heating module (1) and configured to: when the temperature in the electric hot water bag does not reach the preset temperature value, the temperature control switch (8) is in a closed state; when the temperature in the electric hot water bag reaches a preset temperature value, the temperature control switch (8) is in an open state.
10. The control circuit of claim 1, wherein: the water level detection module (4) is a water level sensor or a water level sensing probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222834855.7U CN218446491U (en) | 2022-10-26 | 2022-10-26 | Control circuit of electric hot-water bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222834855.7U CN218446491U (en) | 2022-10-26 | 2022-10-26 | Control circuit of electric hot-water bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218446491U true CN218446491U (en) | 2023-02-03 |
Family
ID=85071228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222834855.7U Active CN218446491U (en) | 2022-10-26 | 2022-10-26 | Control circuit of electric hot-water bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218446491U (en) |
-
2022
- 2022-10-26 CN CN202222834855.7U patent/CN218446491U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212062879U (en) | Electric connector for vehicle, electric connector assembly and vehicle | |
| CN108933427B (en) | Electric water heater and protection device thereof | |
| CN104202845B (en) | The heating means of a kind of electric hot-water bag heater and this heater | |
| CN218446491U (en) | Control circuit of electric hot-water bag | |
| CN206191939U (en) | Dry combustion method structure is prevented to quick water heating device's premonition formula | |
| CN210469748U (en) | Temperature control and protection device for PTC/NTC heating wire | |
| CN217423651U (en) | Anti-freezing and anti-dry-burning device and water heater | |
| CN202382425U (en) | Auxiliary electric-heating temperature control system of water system | |
| CN212751775U (en) | Intelligent electric kettle control circuit with water level detection function | |
| CN211406294U (en) | Safety protection device of flexible hand warmer | |
| CN204217138U (en) | A kind of electric hot-water bag heater | |
| CN216868648U (en) | Electric heating heater with dry burning prevention function | |
| US20240231299A9 (en) | Control circuit of heating apparatus | |
| CN201001630Y (en) | Full-intelligent electric water kettle | |
| CN101251750B (en) | Electrothermic boiled water pot intelligent control circuit with multiple collecting functions | |
| CN209949441U (en) | Electric heating blanket | |
| CN212323349U (en) | Electric water heater plug and electric water heater | |
| KR20070117282A (en) | Temperature controller and the method using timing signal | |
| CN221200303U (en) | Temperature control circuit | |
| CN211701460U (en) | Leakage protector for water heater | |
| CN218728745U (en) | Mocha pot control circuit | |
| CN213694183U (en) | Temperature control and overheating protection circuit for electric heating device | |
| CN114838506B (en) | Antifreezing and dry-burning preventing device, water heater and control method thereof | |
| CN201409433Y (en) | Soy milk grinder with dry-fire preventing double-protection device | |
| CN215869968U (en) | Leakage protection plug for electric water heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |