CN219735638U - Temperature control device of electric water heater and electric water heater - Google Patents
Temperature control device of electric water heater and electric water heater Download PDFInfo
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- CN219735638U CN219735638U CN202321043745.7U CN202321043745U CN219735638U CN 219735638 U CN219735638 U CN 219735638U CN 202321043745 U CN202321043745 U CN 202321043745U CN 219735638 U CN219735638 U CN 219735638U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 238000010438 heat treatment Methods 0.000 claims abstract description 120
- 239000008236 heating water Substances 0.000 claims abstract description 4
- 230000007935 neutral effect Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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Abstract
The utility model discloses a temperature control device of an electric water heater, which comprises a main control chip; the heating module is used for heating water in the inner container of the electric water heater; the temperature sensor module is connected with the main control chip and is used for acquiring the water temperature in the inner container of the electric water heater so that the main control chip controls the starting and stopping of the heating module according to the water temperature; and the switch module is connected with the main control chip and the heating module, and is controlled by the main control chip to realize on-off according to an electric signal sent by the water temperature so as to control the heating module to start or stop. According to the utility model, two temperature control functions of temperature limiting and temperature control can be integrated into the same temperature sensor module, so that the temperature information of starting heating and stopping heating and the direct control of the heating module are realized, other modules in the device can still normally work when the heating module stops working, and meanwhile, the maintenance of the temperature limiting function after electronization can be uniformly carried out with other elements, thereby effectively reducing the maintenance cost.
Description
Technical Field
The utility model relates to the technical field of household appliances, in particular to a temperature control device of an electric water heater and the electric water heater.
Background
The electric water heater in the prior art generally adopts a scheme of matching a front mechanical temperature limiter with an electronic temperature controller for temperature control, and the electronic temperature controller is generally provided with a temperature sensor for collecting the water temperature in the electric water heater so as to judge when the electric water heater needs to start heating, and the mechanical temperature limiter directly cuts off the power supply of elements related to temperature control when the water temperature in the electric water heater reaches a certain height.
On the basis of the scheme, if the heating upper limit of the water temperature is to be adjusted, the mechanical structure of the mechanical temperature limiter is required to be adjusted, the cost is high, the operation is troublesome, and in addition, if the mechanical temperature limiter is triggered, the power supply of other elements related to the temperature control is disconnected, so that the other elements related to the temperature control cannot continue to work normally.
Disclosure of Invention
The utility model provides a temperature control device of an electric water heater and the electric water heater.
The temperature control device of the electric water heater according to the embodiment of the utility model comprises:
a main control chip;
the heating module is used for heating water in the inner container of the electric water heater;
the temperature sensor module is connected with the main control chip and is used for acquiring the water temperature in the inner container of the electric water heater so that the main control chip controls the starting and stopping of the heating module according to the water temperature; and
the switch module is connected with the main control chip and the heating module, and is controlled by the main control chip to realize on-off according to the electric signal sent by the water temperature so as to control the heating module to start or stop.
Therefore, the utility model can realize the temperature information acquisition and action control of starting and stopping heating in the same temperature control circuit by integrating the temperature limiting and temperature control functions into the same temperature sensor module, so that the on-off of the heating module is directly controlled by the switch module, other modules in the device can still work normally when the heating module stops working, and meanwhile, the maintenance of the temperature limiting function after the temperature limiting function is electronized can be uniformly carried out with other elements for temperature control, thereby effectively reducing the maintenance cost.
In some embodiments, the temperature sensor module includes a Wen Kongzi module and a temperature limiting sub-module, the Wen Kongzi module and the temperature limiting sub-module are electrically connected with the main control chip, the temperature controlling sub-module is configured to provide temperature information for the main control chip to control the start of the heating module, and the temperature limiting sub-module is configured to provide temperature information for the main control chip to control the stop of the heating module.
In this way, the temperature sensor module provided by the utility model can be divided into two parts for achieving the temperature standard for obtaining the start heating and the temperature standard for obtaining the stop heating, so as to improve the reliability of the temperature obtaining process.
In some embodiments, the main control chip includes a temperature threshold adjustment module electrically connected to the temperature sensor module for altering a first temperature threshold for controlling the start of the heating module and altering a second temperature threshold for controlling the stop of the heating module in response to an adjustment operation.
Therefore, the utility model can adjust the water temperature when the heating module is started and the water temperature when the heating module is stopped by adjusting the related parameters on the main control chip.
In some embodiments, the switch module comprises a first switch sub-module, the first switch sub-module comprises a first relay, the main control chip is connected with a control circuit of the first relay, and an input end of a working circuit of the first relay is connected with an external alternating current phase line port, and an output end of the working circuit of the first relay is connected with the heating module.
Therefore, the utility model can control the on-off of the heating module by connecting the main control chip with the relay.
In some embodiments, the first switch sub-module further includes a first switch tube, a second switch tube, and a first gate circuit, the input ends of the first switch tube and the second switch tube are all connected with the main control chip, the output end of the first switch tube is connected with the first input end of the first gate circuit, the output end of the second switch tube is connected with the second input end of the first gate circuit, and the output end of the first gate circuit is connected with the control circuit of the first relay.
Therefore, the utility model can improve the reliability of the control of the relay through the arrangement of the two groups of switch tubes and the gate circuit, and avoid the problem of failure of the whole circuit caused by single-line faults.
In some embodiments, the first gate is an and gate.
Therefore, the utility model can switch on the corresponding relay when the two groups of switch tubes simultaneously meet the conditions of the switch tubes by setting the AND gate.
In some embodiments, the switch module further includes a second switch sub-module, the second switch sub-module includes a second relay, the main control chip is connected to a control circuit of the second relay, an output end of a working circuit of the second relay is connected to an external ac neutral line port, and an input end of the working circuit of the second relay is connected to the heating module.
Therefore, the utility model controls the on-off of the heating module by arranging the main control chip to connect the relay, and can improve the reliability of the control of the heating module by simultaneously arranging two groups of relays.
In some embodiments, the second switch sub-module further includes a third switch tube, a fourth switch tube and a second gate circuit, the input ends of the third switch tube and the fourth switch tube are all connected with the main control chip, the output end of the third switch tube is connected with the first input end of the second gate circuit, the output end of the fourth switch tube is connected with the second input end of the second gate circuit, and the output end of the second gate circuit is connected with the control circuit of the second relay.
Therefore, the utility model can improve the reliability of the control of the relay through the arrangement of the two groups of switch tubes and the gate circuit, and avoid the problem of failure of the whole circuit caused by single-line faults.
In some embodiments, the second gate is an and gate.
Therefore, the utility model can switch on the corresponding relay when the two groups of switch tubes simultaneously meet the conditions of the switch tubes by setting the AND gate.
The utility model also provides an electric water heater, which comprises the electric water heater temperature control device in any embodiment.
Additional aspects and advantages of embodiments of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a temperature control device of an electric water heater according to the present utility model;
fig. 2 is a schematic structural diagram of a temperature control device of an electric water heater according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a temperature control device of an electric water heater according to an embodiment of the present utility model;
wherein: 1. a temperature sensor module; 2. a main control chip; 3. a switch module; 31. a first switch sub-module; 32. a second switch sub-module; 4. and a heating module.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the embodiments of the present utility model and are not to be construed as limiting the embodiments of the present utility model.
As shown in fig. 1, the present utility model provides a temperature control device for an electric water heater, comprising:
a main control chip 2;
the heating module 4 is used for heating water in the inner container of the electric water heater;
the temperature sensor module 1 is connected with the main control chip 2, and is used for acquiring the water temperature in the inner container of the electric water heater so that the main control chip 2 controls the starting and stopping of the heating module 4 according to the water temperature; and
the switch module 3, the switch module 3 is connected with the main control chip 2 and the heating module 4, and the switch module 3 is controlled by the main control chip 2 to realize on-off according to the electric signal sent by the water temperature so as to control the heating module 4 to start or stop.
Specifically, the temperature control device of the electric water heater provided by the utility model does not comprise a mechanical temperature limiter in the related art, but integrates the temperature limiting function on the temperature sensor module 1, the temperature sensor module 1 can acquire the water temperature in the inner container of the electric water heater and convert the water temperature into an electric signal to be sent to the main control chip 2, and the main control chip 2 can analyze and process the electric signal which is received from the temperature sensor module 1 and is used for representing the water temperature, so that whether the working state of the heating module 4 needs to be changed under the current temperature condition or not can be determined. For example, when the current water temperature is lower than or equal to the temperature line required to heat the water in the inner container, the main control chip 2 determines that the heating module 4 is required to be started to heat the water in the inner container under the current temperature condition. For example, when the current water temperature is higher than or equal to the temperature line for stopping heating the water in the inner container, the main control chip 2 determines that the operation of the heating module 4 needs to be stopped under the current temperature condition.
After the main control chip 2 analyzes and processes the electric signal for representing the water temperature sent by the temperature sensor module 1, a control electric signal can be obtained, and then the main control chip 2 sends the control electric signal to the switch module 3, so that the switch module 3 controls the starting and stopping of the heating module 4 according to the control electric signal, specifically, controls the connection and disconnection between the main control chip and the heating module 4 according to the content of the control electric signal to control the starting and stopping of the heating module 4. For example, the control electric signal sent by the main control chip 2 indicates that the heating module 4 needs to be started currently, and then the switch module 3 controls the switch to be connected with the heating module 4, so that the heating module 4 works normally. For example, the control signal sent by the main control chip 2 indicates that the running heating module 4 needs to be stopped at present, and the switch module 3 controls the self to be disconnected from the heating module 4, so that the heating module 4 stops working.
In this way, by integrating the temperature limiting function onto the temperature sensor module 1, the structure of the water temperature control system of the electric water heater is greatly simplified, and meanwhile, the mechanical temperature limiter which is difficult to adjust and maintain is avoided, so that the cost of water temperature line adjustment and routine maintenance and repair of the water temperature control system of the electric water heater is greatly reduced. Meanwhile, under the condition that heating is stopped by temperature limiting control, each component used for water temperature control can be kept in an original power supply working state.
Therefore, the utility model can realize the temperature information acquisition and action control of starting and stopping heating in the same temperature control circuit by integrating the temperature limiting and temperature control functions into the same temperature sensor module 1, so that the on-off of the heating module 4 is directly controlled by the switch module 3, other modules in the device can still work normally when the heating module 4 stops working, and meanwhile, the maintenance of the temperature limiting function after the temperature limiting function is electronized can be uniformly carried out with other elements for temperature control, thereby effectively reducing the maintenance cost.
As shown in fig. 2, in some embodiments, the temperature sensor module 1 includes a Wen Kongzi module and a temperature limiting sub-module, where the Wen Kongzi module and the temperature limiting sub-module are both electrically connected to the main control chip 2, the temperature controlling sub-module is configured to provide temperature information for controlling the start of the heating module 4 to the main control chip 2, and the temperature limiting sub-module is configured to provide temperature information for controlling the stop of the heating module 4 to the main control chip 2.
Specifically, for the temperature sensor module 1, since the temperature sensor module 1 needs to monitor two temperature values at the same time when integrating the temperature control and temperature limiting functions, and the two temperature values are generally different, if the temperature sensor module 1 is set as one sensor in this case, the working environment temperature fluctuates greatly, the service life may be reduced due to the fluctuation of the temperature, and the failure of electronic components may easily occur. If this failure condition affects the function of the temperature limiting stop heating module 4, it may cause the heating module 4 to fail to stop operating normally, thereby causing a dangerous condition.
In this case, the temperature sensor module 1 can be disassembled into two sub-modules, each of which is responsible for starting the temperature detection of the heating module 4 and for stopping the temperature detection of the heating module 4. The advantage of this arrangement is that. For example, in some examples, the temperature sensor module 1 includes a temperature control sensor for monitoring and acquiring the water temperature required for starting the heating module 4, and a temperature limiting sensor for monitoring and acquiring the water temperature required for stopping the heating module 4, which are respectively connected to the main control chip 2. Therefore, the types and the structures of the sensors can be reasonably adjusted according to different working intervals of the two sensors, and the occurrence of failure is avoided.
In this way, the temperature sensor module 1 provided by the utility model can be divided into two parts for achieving the temperature standard for obtaining the start heating and the temperature standard for obtaining the stop heating respectively, so as to improve the reliability of the temperature obtaining process.
In some embodiments, the main control chip 2 includes a temperature threshold adjustment module electrically connected to the temperature sensor module 1 for changing a first temperature threshold for controlling the start of the heating module 4 and changing a second temperature threshold for controlling the stop of the heating module 4 in response to the adjustment operation.
Specifically, for the temperature threshold value for controlling the stop of the heating module 4, the mechanical temperature limiter is adopted in the related art, so that the mechanical structure of the temperature limiter needs to be adjusted or the temperature limiter with other specifications needs to be directly replaced, and the labor cost and the device cost for maintenance or maintenance are relatively high. In the present embodiment, since the temperature limiting and controlling functions are integrated into the temperature sensor module 1, the water temperature threshold value required for the main control chip 2 to send out the control electric signal after acquiring the electric signal representing the water temperature can be directly adjusted in the circuit of the temperature control device.
For example, in some examples, when the temperature of the start heating module 4 is 20 ℃ and the temperature of the stop heating module 4 is 70 ℃, and when the temperature of the start heating module 4 is 25 ℃ and the temperature of the stop heating module 4 is 65 ℃, the electrical signal intensity of the main control chip 2 responding to the temperature of the start heating module 4 is changed from the electrical signal intensity corresponding to 20 ℃ to the electrical signal intensity corresponding to 25 ℃ and the electrical signal intensity of the main control chip 2 responding to the temperature of the stop heating module 4 is changed from the electrical signal intensity corresponding to 70 ℃ to the electrical signal intensity corresponding to 65 ℃ by using the temperature threshold adjustment module set in the main control chip 2 according to the preset relation between the temperature and the electrical signal intensity in the properties of the main control chip 2 and the temperature sensor module 1. The electric signal intensity can be current, voltage and other electric physical quantity, and can be adjusted according to the requirement.
In the above case, after the temperature threshold is changed, when the temperature corresponding to the electrical signal sent by the temperature sensor module 1 for controlling the start of the heating module 4 is higher than 25 ℃, the main control chip 2 does not respond, and when the temperature corresponding to the electrical signal sent by the temperature sensor module 1 for controlling the start of the heating module 4 is equal to or lower than 25 ℃, the main control chip 2 generates a control electrical signal according to the electrical signal to control the start of the heating module 4. Similarly, when the temperature corresponding to the electric signal sent by the temperature sensor module 1 for controlling the heating module 4 to stop is lower than 65 ℃, the main control chip 2 does not respond, and when the temperature corresponding to the electric signal sent by the temperature sensor module 1 for controlling the heating module 4 to stop is higher than or equal to 65 ℃, the main control chip 2 generates a control electric signal according to the electric signal to control the heating module 4 to stop.
Thus, the utility model can adjust the water temperature when the heating module 4 is started and the water temperature when the heating module 4 is stopped by adjusting the related parameters on the main control chip 2.
As shown in fig. 2, in some embodiments, the switch module 3 includes a first switch sub-module 31, the first switch sub-module 31 includes a first relay, the main control chip 2 is connected to a control circuit of the first relay, and an input end of a working circuit of the first relay is connected to an external ac phase line port, and an output end of the working circuit of the first relay is connected to the heating module 4.
Specifically, one or more switch sub-modules can be arranged in the switch module 3, the heating module 4 can be started and stopped most simply by adopting a single switch sub-module to control the heating module 4, the reliability of control can be improved by adopting a plurality of switch sub-modules to control the heating module 4, the situation that a relay is always on due to the damage of a specific element is avoided, and the abnormal starting state of the heating module 4 is blocked in time. Because the normal operation voltage of the heating module 4 is far higher than the voltage of several millivolts to several volts in the electronic circuit due to the fact that the heating module 4 is driven by the external 220V alternating current, in order to safely control the starting and stopping of the heating module 4 according to the control electric signal of the main control chip 2, a relay needs to be arranged in the switch sub-module, the relatively tiny electric signal which can be sent by the main control chip 2 through the relay enters the control circuit, the external alternating current and the working circuit of the heating module 4 are connected through the result driving of the control circuit, and the heating module 4 driven by the external alternating current is further controlled, and meanwhile, the influence of the excessive voltage on the normal operation of the electronic circuit is avoided.
Next, an example will be described in which one first switch sub-module 31 is provided in the switch module 3. In some examples, on the basis of the above-described embodiment, the first switch sub-module 31 is provided with a first relay, the control circuit of the first relay is controlled by the main control chip 2, the working circuit is connected in series with the phase line of the external alternating current, and the heating module 4 is connected between the phase line and the neutral line of the external alternating current. Under the condition that the temperature corresponding to the electric signal sent by the temperature sensor module 1 and used for controlling the starting of the heating module 4 is equal to or lower than 25 ℃, the main control chip 2 generates a control electric signal according to the electric signal and sends the control electric signal to the control circuit of the first relay, the control circuit of the first relay is driven to work, the working circuit of the first relay is enabled to be connected, the heating module 4 is connected with an external alternating current loop, and the heating module 4 is started.
Therefore, the utility model can control the on-off of the heating module 4 by connecting the main control chip 2 with the relay.
As shown in fig. 3, in some embodiments, the first switch sub-module 31 further includes a first switch tube, a second switch tube, and a first gate circuit, the input ends of the first switch tube and the second switch tube are both connected to the main control chip 2, the output end of the first switch tube is connected to the first input end of the first gate circuit, the output end of the second switch tube is connected to the second input end of the first gate circuit, and the output end of the first gate circuit is connected to the control circuit of the first relay.
Specifically, in order to make the reliability of the control of the first relay control circuit by the main control chip 2 higher, a plurality of logic conditions may be added between the main control chip 2 and the control circuit of the first relay, and the logic conditions may be checked by the logic gate circuit, and the circuit may be turned on when the logic conditions are satisfied so that the main control chip 2 can send a control electric signal to the control circuit of the relay.
For example, in some examples, in the first switch submodule 31, after the control electrical signal is led out by the main control chip 2, the control electrical signal is respectively input into the first switch tube and the second switch tube, the same or different logic circuits are respectively arranged inside the first switch tube and the second switch tube, the control electrical signal is output in two groups after passing through the logic circuits inside the two groups of switch tubes, the outputs of the two groups of switch tubes are connected into the first gate circuit, the first gate circuit is a logic gate circuit and is used for performing logic operation on the input electrical signal, and only when the two groups of electrical signals input into the first gate circuit meet preset logic conditions, the electrical signal output by the logic gate circuit is an effective control electrical signal capable of driving the first relay control circuit. If at least one of the first switching tube and the second switching tube is damaged, that is, a signal accessed by at least one input end in the first gate circuit does not meet a preset logic condition, the main control chip 2 cannot control the first relay.
For example, on the basis of the above embodiment, under the condition that the temperature corresponding to the electric signal sent by the temperature sensor module 1 and used for controlling the starting of the heating module 4 is equal to or lower than 25 ℃, the main control chip 2 generates a control electric signal according to the electric signal and sends the control electric signal to the first switching tube and the second switching tube respectively, the first switching tube and the second switching tube process the received control electric signal and then connect the output signal to the first gate circuit, the first gate circuit carries out logic operation on the two electric signals connected to the first gate circuit, and under the condition that the two electric signals connected to the first gate circuit meet the preset logic condition, the control circuit of the first relay receives the effective control electric signal and is controlled to work, so that the working circuit of the first relay is connected, the heating module 4 is connected to the external alternating current loop, and the heating module 4 is started. Under the condition that the first switch tube is damaged, two paths of electric signals connected to the first gate circuit cannot meet preset logic conditions, so that a control circuit of the first relay cannot receive effective control electric signals, the control circuit does not work, the working circuit is kept in an off state, and the heating module 4 cannot be connected.
Therefore, the utility model can improve the reliability of the control of the relay through the arrangement of the two groups of switch tubes and the gate circuit, and avoid the problem of failure of the whole circuit caused by single-line faults.
In some embodiments, the first gate is an and gate, as shown in fig. 3.
Specifically, in order to make the reliability as higher as possible, an and gate is generally selected for the selection of the first gate circuit, which is intended to indicate that the outputs of the first switching tube and the second switching tube must meet the preset condition at the same time. The preset condition is determined by the logic circuit structure of the switching tube. However, the output level of the first gate circuit is not limited, and the component structures of the switching tube, the gate circuit and the relay control circuit may be adjusted according to actual situations.
Therefore, the utility model can enable the corresponding relay control circuit to be effective only when the two groups of switch tubes simultaneously meet the conditions of the switch tubes through the arrangement of the AND gate.
As shown in fig. 2, in some embodiments, the switch module 3 further includes a second switch sub-module 32, the second switch sub-module 32 includes a second relay, the main control chip 2 is connected to a control circuit of the second relay, and an output end of a working circuit of the second relay is connected to an external ac neutral line port, and an input end of the working circuit of the second relay is connected to the heating module 4.
Specifically, in the above embodiments, the scheme of directly controlling the relay control circuit by the main control chip 2 through a switch sub-module has been described, and will not be described herein.
In addition, in order to further improve the reliability of the control of the start and stop of the heating module 4, a second switching sub-module 32 may be further provided in addition to the first switching sub-module 31. In some examples, the second switch sub-module 32 also includes a second relay, and the main control chip 2 is directly connected to the control circuit of the second relay, and the working circuit of the second relay is connected in series with the heating module 4 on the neutral line of the external ac circuit. In this way, the phase line is led in, the first relay working circuit, the heating module 4 and the second relay working circuit are connected in series, and then led out from the neutral line to form a complete loop of the external alternating current together.
In the case where the first switch sub-module 31 and the second switch sub-module 32 are provided together, the main control chip 2 is connected to both the control circuit of the first relay and the control circuit of the second relay. On the basis of the embodiment described above, when the temperature corresponding to the electric signal sent by the temperature sensor module 1 and used for controlling the heating module 4 to stop is higher than or equal to 65 ℃, the main control chip 2 generates a control electric signal according to the electric signal and sends the control electric signal to the control circuit of the first relay and the control circuit of the second relay at the same time, and the working circuit of the first relay and the working circuit of the second relay are controlled to be disconnected, so that the heating module 4 stops. If one of the first relay and the second relay is damaged, so that the working circuit is in a normally-on state, the other relay can still be disconnected to switch off the external alternating current loop, and the heating module 4 is stopped. Therefore, when the single-side relay is damaged and is always communicated, the heating module 4 can still be stopped by turning off the relay at the other side, and dangerous situations caused by long-time heating due to failure are avoided.
Therefore, the utility model controls the on-off of the heating module 4 by arranging the main control chip 2 to connect with the relay, and can improve the reliability of the control of the heating module 4 by simultaneously arranging two groups of relays.
As shown in fig. 3, in some embodiments, the second switch submodule 32 further includes a third switch tube, a fourth switch tube, and a second gate circuit, where input ends of the third switch tube and the fourth switch tube are connected to the main control chip 2, an output end of the third switch tube is connected to a first input end of the second gate circuit, an output end of the fourth switch tube is connected to a second input end of the second gate circuit, and an output end of the second gate circuit is connected to a control circuit of the second relay.
Specifically, for the second switch sub-module 32, in order to make the reliability of the control of the relay control circuit by the main control chip 2 higher, as with the first switch sub-module 31, a plurality of logic conditions may be added between the main control chip 2 and the control circuit of the relay, and the logic conditions may be checked by the logic gate circuit, and the circuit may be turned on in the case where the logic conditions are satisfied so that the main control chip 2 can transmit the control electric signal to the control circuit of the relay. The connection mode and logic action of the third switch tube, the fourth switch tube and the second gate circuit are the same as those of the first switch tube, the second switch tube and the first gate circuit in the first switch sub-module 31, and are not described here again.
In addition, for the case that the first switch sub-module 31 and the second switch sub-module 32 are simultaneously arranged, the first relay in the first switch sub-module 31 and the second relay in the second switch sub-module 32 are necessary elements for directly controlling the on/off of the external ac circuit and the start and stop of the heating module 4, and the first, second, third, fourth switch tubes and the first and second gate circuits are used for improving the reliability of the control of the relay control circuit corresponding to the main control chip 2 in the corresponding switch sub-module, and whether the arrangement is possible to be adjusted according to the actual situation. Fig. 2 and 3 only schematically show the case where neither the first switch sub-module 31 nor the second switch sub-module 32 is provided with a switching tube and gate circuit, and the case where both the switching tube and gate circuits are provided, and other cases may be determined according to practical situations.
Therefore, the utility model can improve the reliability of the control of the relay through the arrangement of the two groups of switch tubes and the gate circuit, and avoid the problem of failure of the whole circuit caused by single-line faults.
In some embodiments, the second gate circuit is an and gate, as shown in fig. 3.
In order to be able to make the reliability as high as possible, an and gate is generally selected for the selection of the second gate circuit, which is intended to indicate that the outputs of the third switching tube and the fourth switching tube must meet preset conditions at the same time. The preset condition is determined by the logic circuit structure of the switching tube. However, the output level of the second gate circuit is not limited, and the component structures of the switching transistor, the gate circuit, and the relay control circuit may be adjusted according to actual conditions.
Therefore, the utility model can enable the corresponding relay control circuit to be effective only when the two groups of switch tubes simultaneously meet the conditions of the switch tubes through the arrangement of the AND gate.
The utility model also provides an electric water heater, which comprises the electric water heater temperature control device according to any one of the above embodiments.
In the description of the present specification, reference to the terms "certain embodiments," "in one example," "illustratively," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present utility model in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present utility model.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (10)
1. A temperature control device for an electric water heater, the device comprising:
a main control chip;
the heating module is used for heating water in the inner container of the electric water heater;
the temperature sensor module is connected with the main control chip and is used for acquiring the water temperature in the inner container of the electric water heater so that the main control chip controls the starting and stopping of the heating module according to the water temperature; and
the switch module is connected with the main control chip and the heating module, and is controlled by the main control chip to realize on-off according to the electric signal sent by the water temperature so as to control the heating module to start or stop.
2. The device of claim 1, wherein the temperature sensor module comprises a Wen Kongzi module and a temperature limiting sub-module, the Wen Kongzi module and the temperature limiting sub-module are electrically connected with the main control chip, the temperature controlling sub-module is used for providing temperature information for controlling the start of the heating module to the main control chip, and the temperature limiting sub-module is used for providing temperature information for controlling the stop of the heating module to the main control chip.
3. The apparatus of claim 1, wherein the master control chip includes a temperature threshold adjustment module electrically coupled to the temperature sensor module for altering a first temperature threshold for controlling the start of the heating module and altering a second temperature threshold for controlling the stop of the heating module in response to an adjustment operation.
4. The device of claim 1, wherein the switch module comprises a first switch sub-module, the first switch sub-module comprises a first relay, the main control chip is connected with a control circuit of the first relay, and an input end of a working circuit of the first relay is connected with an exogenous alternating current phase line port, and an output end of the working circuit of the first relay is connected with the heating module.
5. The device of claim 4, wherein the first switching sub-module further comprises a first switching tube, a second switching tube and a first gate circuit, wherein the input ends of the first switching tube and the second switching tube are connected with the main control chip, the output end of the first switching tube is connected with the first input end of the first gate circuit, the output end of the second switching tube is connected with the second input end of the first gate circuit, and the output end of the first gate circuit is connected with the control circuit of the first relay.
6. The apparatus of claim 5, wherein the first gate is an and gate.
7. The device of claim 1, wherein the switch module further comprises a second switch sub-module, the second switch sub-module comprises a second relay, the main control chip is connected with a control circuit of the second relay, and an output end of a working circuit of the second relay is connected with an external alternating current neutral line port, and an input end of the working circuit of the second relay is connected with the heating module.
8. The device of claim 7, wherein the second switching sub-module further comprises a third switching tube, a fourth switching tube and a second gate circuit, wherein the input ends of the third switching tube and the fourth switching tube are connected with the main control chip, the output end of the third switching tube is connected with the first input end of the second gate circuit, the output end of the fourth switching tube is connected with the second input end of the second gate circuit, and the output end of the second gate circuit is connected with the control circuit of the second relay.
9. The apparatus of claim 8, wherein the second gate circuit is an and gate.
10. An electric water heater, characterized in that it comprises an electric water heater temperature control device according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321043745.7U CN219735638U (en) | 2023-04-28 | 2023-04-28 | Temperature control device of electric water heater and electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321043745.7U CN219735638U (en) | 2023-04-28 | 2023-04-28 | Temperature control device of electric water heater and electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219735638U true CN219735638U (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321043745.7U Active CN219735638U (en) | 2023-04-28 | 2023-04-28 | Temperature control device of electric water heater and electric water heater |
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| Country | Link |
|---|---|
| CN (1) | CN219735638U (en) |
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2023
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