CN102880070B - Electric pressure cooker control device - Google Patents
Electric pressure cooker control device Download PDFInfo
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- CN102880070B CN102880070B CN201210353177.0A CN201210353177A CN102880070B CN 102880070 B CN102880070 B CN 102880070B CN 201210353177 A CN201210353177 A CN 201210353177A CN 102880070 B CN102880070 B CN 102880070B
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- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 230000006698 induction Effects 0.000 claims abstract description 25
- 230000001939 inductive effect Effects 0.000 claims description 8
- 238000009835 boiling Methods 0.000 abstract description 23
- 238000010411 cooking Methods 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 11
- 241000209094 Oryza Species 0.000 description 10
- 235000007164 Oryza sativa Nutrition 0.000 description 10
- 235000009566 rice Nutrition 0.000 description 10
- 235000013305 food Nutrition 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000002791 soaking Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229940126680 traditional chinese medicines Drugs 0.000 description 1
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Abstract
The invention discloses a control device of an electric pressure cooker, which comprises: the heating plate, the control panel and the induction control switch; a relay switch is arranged between an L1 interface and an L2 interface on the control board, and an L2 interface is connected with one end of a power supply; the L1 interface is connected with one end of the heating plate, and the other end of the heating plate is connected with the other end of the power supply; when the pressure of the induction control switch in the cooker is higher than a first pressure value, a first signal is sent to the control panel, and the control panel controls the relay switch to be switched on when receiving the first signal; after the induction control switch sends the first signal, a second signal is sent to the control board when the temperature in the pot is higher than a first temperature value, and a third signal is sent to the control board when the temperature in the pot is lower than the first temperature value; when the control board receives the second signal, the relay switch is controlled to be switched off; and when the third signal is received, the relay switch is controlled to be switched on. The technical scheme provided by the invention can solve the problem that the existing electric pressure cooker can not realize boiling in the cooking process.
Description
Technical Field
The invention relates to the field of small household appliance manufacturing, in particular to a control device of an electric pressure cooker.
Background
The existing electric pressure cooker generally uses a fully-sealed non-boiling mode for cooking. In this mode, the food does not tumble during cooking; the boiled rice turns grey due to the fact that the pot is sealed and cannot reach a boiling state, and the taste of the boiled rice is not fragrant enough.
In summary, the conventional electric pressure cooker can only use the fully-sealed no-boiling mode for cooking, and thus cannot achieve boiling.
Disclosure of Invention
The invention provides a control device of an electric pressure cooker, which aims to solve the problem that the existing electric pressure cooker can only use a full-sealing mode to cook and can not achieve boiling.
The invention discloses a control device of an electric pressure cooker, which comprises: the heating plate, the control panel and the induction control switch; wherein, the control board is provided with an L1 interface and an L2 interface; the L2 interface is connected with one end of a power supply; the L1 interface is connected with one end of the heating plate, and the other end of the heating plate is connected with the other end of the power supply; a relay switch is arranged between the L1 interface and the L2 interface; when the pressure of the induction control switch in the electric pressure cooker is higher than a first pressure value, a first signal is sent to the control board, and when the control board receives the first signal, the relay switch is controlled to be switched on; after the induction control switch sends the first signal, a second signal is sent to the control board when the temperature in the electric pressure cooker is higher than the first temperature value, and a third signal is sent to the control board when the temperature in the electric pressure cooker is lower than the first temperature value; when the control board receives the second signal, the relay switch is controlled to be switched off; and when the control board receives the third signal, the relay switch is controlled to be switched on.
In the device, the induction control switch further sends a first signal to the control board when the temperature in the electric pressure cooker is higher than a second temperature value, the induction control switch further sends a second signal to the control board when the temperature in the electric pressure cooker is higher than a third temperature value, and the induction control switch further sends a third signal to the control board when the temperature in the electric pressure cooker is lower than the third temperature value.
In the above device, the control device of the electric pressure cooker further comprises: a temperature control timer and a pressure maintaining timer; after the control board receives the first signal, starting a temperature control timer; and after the temperature control timer is reset to zero, the control panel starts the pressure maintaining timer, and after the pressure maintaining timer is reset to zero, the control panel controls the relay switch to be switched off.
In the device, the induction control switch sends a fourth signal to the control board when the temperature in the electric pressure cooker is higher than the protection temperature value, and the control board controls the relay switch to be switched off when receiving the fourth signal.
In the above device, the control device of the electric pressure cooker further comprises: a buzzer; and when the control panel receives the fourth signal, the buzzer is controlled to work.
In the above device, the control device of the electric pressure cooker further comprises: a thermal fuse; one end of the thermal fuse link is connected with one end of a power supply, and the other end of the thermal fuse link is connected with an L2 interface; or one end of the thermal fuse link is connected with the other end of the power supply, the other end of the thermal fuse link is connected with one end of the heating disc, and the other end of the heating disc is connected with the L1 interface.
In the above apparatus, the inductive control switch comprises a pressure switch and a temperature sensor; the temperature sensor is a thermistor or a temperature sensing switch, and the pressure switch is a microswitch, a bimetallic strip flash switch or a temperature control switch.
In the device, the first pressure value is 40-60 kpa, the first temperature value is 145-155 ℃, the second temperature value is 130-140 ℃, and the third temperature value is 115-125 ℃.
In the device, the timing duration of the temperature control timer is 2 min-10 min; the timing duration of the pressure maintaining timer is 6-20 min.
In the above device, the control device of the electric pressure cooker further comprises: a display panel; the display panel comprises a plurality of input pins, wherein the pins are respectively connected with the signal output ends of the pressure switch, the temperature sensor, the micro switch, the buzzer or the relay switch.
In summary, the control board in the control device for an electric pressure cooker controls the relay switch between the branch L1 and the branch L2 to be turned on according to the received first signal, controls the relay switch to be turned off according to the received third signal, and controls the relay switch to be turned on according to the received second signal; this repeatedly achieves micro-boiling of the cooking process. The electric pressure cooker control device provided by the invention can realize the micro-boiling cooking function by using fewer components. Intermittent micro-boiling throughout the cooking process; the cooked rice is more uniform and does not turn grey, and the taste of the cooked rice is improved.
Drawings
FIG. 1 is a schematic circuit diagram of a control device for an electric pressure cooker according to the present invention;
FIG. 2 is a circuit schematic of a relay switch of the present invention;
FIG. 3 is a detailed circuit schematic diagram of a control device of an electric pressure cooker in the invention;
FIG. 4 is a schematic circuit diagram of a buzzer in accordance with the present invention;
FIG. 5 is a circuit schematic of a digital circuit power supply of the present invention;
FIG. 6 is a schematic view showing a structure of a display panel according to the present invention;
fig. 7 is a flow chart of the operation of the control device of the electric pressure cooker in the invention.
Detailed Description
The core of the invention is: the L2 interface of the control board is connected with one end of the power supply; the L1 interface is connected with one end of the heating plate, and the other end of the heating plate is connected with the other end of the power supply; a relay switch is arranged between the L1 interface and the L2 interface; the induction control switch sends a first signal to the control board when the pressure in the electric pressure cooker is higher than a first pressure value, sends a second signal to the control board when the temperature in the electric pressure cooker is higher than a first temperature value, and sends a third signal to the control board when the temperature in the electric pressure cooker is lower than the first temperature value; when the control board receives the first signal, the relay switch is controlled to be switched on; after receiving the first signal, when receiving the second signal, controlling the relay switch to be switched off; and when the third signal is received, controlling the relay switch to be switched on until the cooking process is finished. Namely, the on-off of the relay switch is controlled according to different signals to realize continuous micro-boiling state through monitoring different states in the pan.
The main principle of the invention is that the control panel and the inductive control switch are adopted to control the heating disc to heat, when the temperature in the cooker is higher than a first temperature value, and the pressure in the cooker is higher than the threshold value of the pressure limiting valve, the pressure limiting valve exhausts air, the pressure in the cooker is reduced, so that the food in the cooker reaches a micro-boiling state, and meanwhile, the control panel controls the heating disc to stop heating; when the temperature in the pot is lower than the first temperature value, the control panel controls the heating plate to continue heating, so that the temperature and the pressure in the pot are increased. The circulation ensures that the rice is boiled intermittently in the whole stage of the cooking process, so that the cooked rice is not grey and is fragrant.
The electric pressure cooker control device provided by the invention is not limited to be applied to an electric pressure cooker, and can be applied to any household appliance with pressure in a cooking state.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
example one
Fig. 1 is a schematic circuit diagram of a control device of an electric pressure cooker according to the present invention, as shown in fig. 1,
N-L is an external alternating current power supply, R0 is a heating disc, M is a control panel, L1 and L2 represent an L1 interface and an L2 interface which are arranged on the control panel M, wherein the L2 interface is connected with one end of the power supply; the L1 interface is connected with one end of the heating plate, and the other end of the heating plate is connected with the other end of the power supply; a relay switch is arranged between the L1 interface and the L2 interface. Wherein, the inductive control switch includes: a pressure switch K1 and a temperature sensor K2; wherein, the temperature sensor K2 is a thermistor or a temperature sensing switch; the pressure switch K1 is a microswitch, a bimetallic strip flash switch or a temperature control switch.
The P1 and the P2 are interfaces or slots arranged on the control board and are used for inserting components such as an external pressure switch and a temperature sensor.
K1 is a pressure switch which sends a first signal to the control board when the pressure in the electric pressure cooker is higher than a first pressure value.
K2 is a temperature sensor which sends a second signal to the control board when the temperature in the electric pressure cooker is higher than the first temperature value; and sending a third signal to the control board when the temperature in the electric pressure cooker is lower than the first temperature value.
Setting the first pressure value and the first temperature value according to actual conditions; specifically, the first pressure value is 40-60 kpa; the first temperature value is 145-155 ℃.
When the micro-boiling mode is selected, the control panel M controls the relay switch to be switched on when receiving a first signal, and the heating plate continues to work; after receiving the first signal, when the control board M receives the second signal, the relay switch is controlled to be switched off, and the heating plate stops working; when the control board M receives the third signal, the relay switch is controlled to be switched on, and the heating plate continues to work.
Since the temperature is proportional to the pressure in a certain volume, a temperature sensor for detecting the temperature can be used as a sensor for detecting the pressure in the electric pressure cooker. When the temperature reaches the first temperature value, the pressure in the cooker reaches the threshold value of the pressure limiting valve, specifically, the pressure in the cooker reaches 70-100 kpa.
In a specific embodiment of the present invention, the relay switch is a digital relay switch circuit disposed inside the control board M. Fig. 2 is a schematic circuit diagram of a Relay switch according to the present invention, and as shown in fig. 2, the Relay switch is composed of a transistor and a Relay, and when the input terminal R receives an externally supplied digital signal (Relay signal Relay), the Relay is controlled to turn on the branch where the hot plate R0 is located or turn off the branch where the hot plate R0 is located. Wherein, the triode is an S8050 type triode. In other embodiments of the present invention, other relay switch circuits may be used, and are not limited to those provided in the embodiments of the present invention.
Example two
In a specific use process, when too much food is in the pot, the pressure in the pot can not reach the first pressure value, but the food is quickly cooked. In order to realize micro-boiling, the induction control switch further sends a first signal to the control board when the temperature in the electric pressure cooker is higher than a second temperature value, the induction control switch sends a second signal to the control board when the temperature in the electric pressure cooker is higher than a third temperature value, and the induction control switch sends a third signal to the control board when the temperature in the electric pressure cooker is lower than the third temperature value.
In the embodiment, the pressure in the electric pressure cooker does not reach the working threshold of the pressure switch K1, and the sensing temperature of the temperature sensor K2 is used as a reference standard. When the temperature in the electric pressure cooker is higher than the second temperature value, the temperature sensor K2 sends a first signal to the control board; when the temperature in the electric pressure cooker is higher than the third temperature value, the temperature sensor K2 sends a second signal to the control board; when the temperature in the electric pressure cooker is lower than the third temperature value, the temperature sensor K2 sends a third signal to the control board. And the control board correspondingly controls according to the received first signal, the second signal and the third signal. The specific control method is the same as the first embodiment.
In the present embodiment, the second temperature value and the third temperature value are set according to specific situations; wherein the second temperature value is 130-140 ℃; the third temperature value is 115-125 ℃.
EXAMPLE III
With reference to the first and second embodiments, the control device of the electric pressure cooker further includes: a temperature control timer and a pressure maintaining timer; after the control board receives the first signal, starting a temperature control timer; and after the temperature control timer is reset to zero, the control panel starts the pressure maintaining timer, and after the pressure maintaining timer is reset to zero, the control panel controls the relay switch to be switched off.
Namely, after the control board receives the first signal, the temperature control stage is entered. The temperature controlled timer is started. Wherein the timing duration of the temperature control timer is 2 min-10 mim.
In the temperature control stage, the control panel controls the temperature in the pot to be about a designated temperature value according to the second signal and the third signal sent by the induction control switch. Wherein, every time the control panel receives the third signal once, the relay switch is controlled to be switched on, the heating plate heats once, and once boiling is realized in the electric pressure cooker.
After the control board enters the temperature control stage, namely after the control board receives the first signal, the control board receives the second signal and the third signal to play a role. In the second embodiment, the third temperature value is lower than the second temperature value, i.e. after entering the temperature control stage, the heating is stopped and the temperature is reduced, so as to control the temperature in the pan to be about the third temperature value.
And after the temperature control stage is finished, namely the temperature control timer returns to zero, starting the pressure maintaining timer at the same time, and entering the pressure maintaining stage. Wherein the timing duration of the pressure maintaining timer is 6 min-20 mim.
And in the pressure maintaining stage, the control board controls the pressure in the cooker to be above or below the specified pressure value according to the second signal and the third signal sent by the induction control switch. Until the dwell timer is zeroed.
After the pressure-holding timer is reset to zero, the control panel controls the relay switch to be switched off, and the cooking process is finished.
Example four
This embodiment is the same as the third embodiment except for the following features.
Fig. 3 is a detailed circuit schematic diagram of a control device of an electric pressure cooker, wherein the induction control switch sends a fourth signal to the control board when the temperature in the electric pressure cooker is higher than a protection temperature value, and the control board controls the relay switch to be switched off when receiving the fourth signal. Wherein, a protection temperature value is set according to specific conditions, and the protection temperature value is 160-180 ℃.
And when the temperature sensor senses that the temperature at the bottom of the electric pressure cooker is higher than the protection temperature value, a fourth signal is sent to the control board.
In the specific operation process, the condition that the water in the empty pot or the pot is boiled to be dry (dry burning) can occur, and a protection temperature value is set for better protecting the control device of the electric pressure cooker. Under the condition of dry burning, the temperature in the pot can continuously rise, when the temperature rises to a set protection temperature value, the temperature sensor sends a fourth signal to the control board, and the control board controls the electric heating tray to stop heating after receiving the fourth signal.
Referring to fig. 3, the temperature sensor is a thermistor T1 arranged on a P2 slot of the control board M, and the thermistor T1 is specifically arranged at the bottom of the electric pressure cooker. When the water in the pot is about to be dried, the temperature of the pot bottom is increased, and when the temperature is higher than the working temperature of the thermistor T1, the thermistor T1 is conducted, and a fourth signal is sent to the control board M. When the control board M receives the fourth signal, the relay switch is controlled to be switched off, and the heating disc R0 stops heating; when the temperature is lower than the working temperature, the thermistor can also protect the circuit from being burnt out. The working temperature value of the thermistor is a set protection temperature value, specifically 160-180 ℃.
EXAMPLE five
The present embodiment is the same as the fourth embodiment except for the following features, specifically, the control device of the electric pressure cooker further includes: a buzzer; and when receiving the fourth signal, the controller controls the buzzer to work.
The buzzer is not shown in the analogue circuit diagram shown in fig. 3, the corresponding digital circuit diagram being shown in detail. Fig. 4 is a schematic circuit diagram of a buzzer according to the present invention, and the buzzer circuit includes a buzzer and a transistor, as shown in fig. 4. The working principle is that according to a buzzer signal (buzzer) given by the input end B, the buzzer can give out alarm sound so as to remind a user.
In addition, in the specific implementation process, the buzzer can send out prompt tone alarm according to any signal received by the control panel to remind a user. For example, after power is supplied, after cooking work is finished, when an abnormal condition occurs, when a user selects a function, or during display panel operation or the like, the control panel controls the buzzer to emit a prompt sound. Wherein, according to different situations of the electric pressure cooker, the control board controls the buzzer to send out different prompt tones for alarming according to different received signals. Namely, when reminding a user that the electric pressure cooker has abnormal conditions, different alarm sounds can be used for distinguishing different abnormal conditions.
EXAMPLE six
This embodiment is the same as embodiment five except for the following features. Specifically, as shown in fig. 3, an N1 interface is further provided on the control board; and a digital circuit power supply is arranged between the N1 interface and the L2 interface. Because the relay switch circuit, the buzzer and the control panel M need to be powered by direct current to work, if an external direct current power supply is additionally used for supplying power, the composition structure and the attractiveness of the whole electric pressure cooker are influenced, and the normal work of the electric pressure cooker is influenced by the external power supply. Therefore, a digital circuit power supply for converting alternating current into direct current is directly arranged on the N1 interface and the L2 interface on the control board. After the power is turned on, the digital circuit power supply arranged between the N1 interface and the L2 interface works. Fig. 5 is a schematic circuit diagram of a digital circuit power supply according to the present invention, and as shown in fig. 5, when the N1 interface is turned on, the digital circuit power supply operates to provide power input to the control board, the relay switch circuit, the buzzer, and the like.
EXAMPLE seven
This embodiment is the same as embodiment six except for the following features. Specifically, the electric pressure cooker control device further comprises: and (3) thermal fusing body. Referring to fig. 3, a first thermal link FU1 and a second thermal link FU2 are provided in this embodiment. One end of the second thermal link FU2 is connected with one end of the power supply, and the other end of the second thermal link FU2 is connected with the L2 interface.
One end of the first thermal link FU1 is connected with the other end of the power supply, and the other end of the first thermal link FU1 is connected with the N1 interface; wherein, the first thermal fuse link FU1 is connected in series with the heating plate R0. I.e., N1 is interfaced between the first thermal fuse link FU1 and the heat-generating disk R0.
In other embodiments, only the first thermal link FU1 may be provided, or only the second thermal link FU2 may be provided; or a plurality of thermal fuses are connected in series or in parallel and then connected into the circuit.
Example eight
The present embodiment is the same as the seventh embodiment except for the following features, specifically, the control device of the electric pressure cooker further includes: and displaying the panel. As shown in fig. 3, the display panel S1 is connected to the P3 interface of the control panel M, and a micro switch K3 is provided on the P4 interface. Fig. 6 is a schematic diagram of a display panel of the present invention, and referring to fig. 6, the display panel S1 includes a plurality of input pins, wherein each pin is connected to a signal output terminal of a sensor, an inductive control switch, a micro switch, a buzzer or a relay switch; the inductive control switch comprises a temperature sensor and a pressure switch.
One pin is used as an input end and is respectively collinear with the output ends of the thermistor T1, the pressure switch K1, the microswitch K3, the pressure limiting valve K2, the buzzer or the relay switch. As shown in fig. 6, the 1 st pin is connected to a thermistor (NTC), the 2 nd pin is connected to a micro switch (Door), the 3 rd pin is connected to a Pressure switch (Pressure), the 4 th pin is connected to a Buzzer (Buzzer), and the 5 th pin is connected to a relay switch (relay).
The process of micro-boiling rice cooking using the apparatus of the present invention will be described below by way of specific examples.
FIG. 7 is a flow chart of the operation of the control device of the electric pressure cooker in the present invention; as shown in connection with figures 3 and 7,
step 701, selecting a micro-boiling mode.
Step 702, wait 30 seconds. After waiting for 30 seconds, the relay switch between the L1 interface and the L2 interface is turned on, and the heat generating plate starts operating.
Step 703, soaking for 5 minutes. The soaking is preheating, and the temperature is ensured to be between 60 ℃ and 80 ℃.
Step 704, heating is continued. The pressure in the pan slowly rises.
Step 705, the inductive control switch determines the pressure in the cooker. If the pressure in the cooker is higher than the first pressure value, step 707 is performed, and if the current pressure in the cooker does not reach the first pressure value, step 706 is performed.
Step 706, the induction control switch judges the temperature in the pan. If the temperature in the pan is higher than the second temperature value, step 708 is performed, and if the temperature in the pan is lower than the second temperature value, step 704 is performed.
And step 707, entering a temperature control stage and starting a temperature control timer. In step 707, when the pressure in the pan reaches a first pressure value, i.e. 40kpa, the pressure switch trips and a first signal is sent to the control board. The control board controls the relay switch to be continuously switched on according to the received first signal, namely, the relay switch is continuously heated, so that the pressure in the cooker is continuously increased. When the temperature in the electric pressure cooker reaches a first temperature value, namely 150 ℃, a second signal is sent to the control board, and meanwhile, the pressure in the electric pressure cooker reaches the threshold value of the pressure limiting valve, and the pressure limiting valve starts to exhaust. Meanwhile, the control panel controls the relay switch to be switched off according to the received second signal. After the pressure limiting valve exhausts, the pressure in the cooker is reduced, and the food in the cooker begins to boil. And when the temperature in the pot is lower than the first temperature value, the temperature sensor is closed and sends a third signal to the controller, and the controller controls the relay switch to be switched on according to the received third signal, namely, the heating is continued. The steps are repeated until the temperature control timer returns to zero.
Step 708, enter the temperature control phase, start the temperature control timer. In step 708, when the temperature in the pan reaches the second temperature value, i.e. 135 ℃, and sends a first signal to the control board, the control board controls the relay switch to be continuously turned on according to the received first signal. When the temperature in the electric pressure cooker reaches a third temperature value, namely 120 ℃, a second signal is sent to the control board, and meanwhile, the pressure in the electric pressure cooker reaches the threshold value of the pressure limiting valve, and the pressure limiting valve starts to exhaust. And the control board controls the relay switch to be switched off according to the received second signal. After the pressure limiting valve exhausts, the pressure in the cooker is reduced, and the food in the cooker begins to boil. When the temperature in the pot is lower than the third temperature value, the temperature sensor is closed and sends a third signal to the controller, and the controller controls the relay switch to be switched on according to the received third signal, namely, the heating is continued. The steps are repeated until the temperature control timer returns to zero.
Step 709, entering a pressure maintaining stage, and starting a pressure maintaining timer. In step 709, the timing duration of the set pressure maintaining timer is 8min to 12 mm. And in the pressure maintaining stage, the control board controls the pressure in the cooker to be above or below the specified pressure value according to the second signal and the third signal sent by the induction control switch. Until the dwell timer is zeroed.
And step 710, resetting the pressure maintaining timer to zero, and finishing the work.
In steps 701 to 709, the buzzer issues a warning alarm according to control of the control panel. The electric pressure cooker control device provided by the invention ensures intermittent boiling in the whole stage of the cooking process. Namely, the boiling is carried out once before the pressure maintaining, and in addition to carrying out the boiling once before the pressure maintaining, the boiling is realized once every heating in the pressure maintaining process. The cooked rice has no gray color and good taste.
In summary, the present invention provides a control device for an electric pressure cooker, which controls the relay switch between the L1 branch and the L2 branch to be switched on according to the received first signal through a control board; and after receiving the first signal, controlling the relay switch to be switched off according to the received second signal, controlling the relay switch to be switched on according to the received third signal, repeating the steps until the temperature control timer works to zero, and finishing the cooking process. The electric pressure cooker control device provided by the invention can realize the micro-boiling cooking function by using fewer components. Intermittent micro-boiling throughout the cooking process; the cooked rice is more uniform and does not turn grey, and the taste of the rice is improved; besides being used for cooking, the multifunctional electric cooker can also be used for cooking functions which need boiling but are not easy to block, such as other functions of cooking traditional Chinese medicines and the like.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The electric pressure cooker control device is characterized by comprising the following components: the heating plate, the control panel and the induction control switch; wherein,
an L1 interface and an L2 interface are arranged on the control board;
the L2 interface is connected with one end of a power supply; the L1 interface is connected with one end of the heating plate, and the other end of the heating plate is connected with the other end of the power supply;
a relay switch is arranged between the L1 interface and the L2 interface;
when the pressure of the induction control switch in the electric pressure cooker is higher than a first pressure value, a first signal is sent to the control board, and when the control board receives the first signal, the relay switch is controlled to be switched on;
after the induction control switch sends the first signal, a second signal is sent to the control board when the temperature in the electric pressure cooker is higher than the first temperature value, and a third signal is sent to the control board when the temperature in the electric pressure cooker is lower than the first temperature value;
when the control board receives the second signal, the relay switch is controlled to be switched off;
and when the control board receives the third signal, the relay switch is controlled to be switched on.
2. The apparatus of claim 1,
the inductive control switch further sends a first signal to the control board when the temperature in the electric pressure cooker is higher than a second temperature value,
the inductive control switch further sends a second signal to the control board when the temperature in the electric pressure cooker is higher than a third temperature value,
the induction control switch further sends a third signal to the control board when the temperature in the electric pressure cooker is lower than a third temperature value.
3. The control device of the electric pressure cooker according to any one of claims 1-2, characterized in that,
the electric pressure cooker control device further comprises: a temperature control timer and a pressure maintaining timer;
after the control board receives the first signal, starting a temperature control timer;
after the temperature control timer is reset to zero, the control board starts the pressure maintaining timer,
after the pressure-maintaining timer is reset to zero, the control board controls the relay switch to be switched off, and the electric pressure cooker enters a heat-maintaining state.
4. The control device of the electric pressure cooker according to claim 3,
the induction control switch sends a fourth signal to the control board when the temperature in the electric pressure cooker is higher than the protection temperature value,
and when the control board receives the fourth signal, the relay switch is controlled to be switched off.
5. The control device of the electric pressure cooker according to claim 4,
the electric pressure cooker control device further comprises: a buzzer;
and when the control panel receives the fourth signal, the buzzer is controlled to work.
6. The electric pressure cooker control device according to claim 3, further comprising: a thermal fuse;
one end of the thermal fuse link is connected with one end of a power supply, and the other end of the thermal fuse link is connected with an L2 interface;
or,
one end of the thermal fuse link is connected with the other end of the power supply, the other end of the thermal fuse link is connected with one end of the heating plate, and the other end of the heating plate is connected with the L1 interface.
7. The control device of electric pressure cooker as claimed in claim 6, wherein the control device is a control device for electric pressure cooker
The induction control switch comprises a pressure switch and a temperature sensor; the temperature sensor is a thermistor or a temperature sensing switch, and the pressure switch is a microswitch, a bimetallic strip flash switch or a temperature control switch.
8. The control device of the electric pressure cooker according to claim 7,
the first pressure value is 40-60 kpa, the first temperature value is 145-155 ℃, the second temperature value is 130-140 ℃, and the third temperature value is 115-125 ℃.
9. The control device of the electric pressure cooker according to claim 3,
the timing duration of the temperature control timer is 2-10 min;
the timing duration of the pressure maintaining timer is 6-20 min.
10. The electric pressure cooker control device according to claim 9, further comprising: a display panel;
the display panel comprises a plurality of input pins, wherein the pins are respectively connected with the signal output ends of the pressure switch, the temperature sensor, the micro switch, the buzzer or the relay switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210353177.0A CN102880070B (en) | 2012-09-19 | 2012-09-19 | Electric pressure cooker control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN105877478A (en) * | 2015-01-26 | 2016-08-24 | 佛山市顺德区美的电热电器制造有限公司 | Pressure cooking utensil and cooling control method thereof |
| CN105877476A (en) * | 2015-01-26 | 2016-08-24 | 佛山市顺德区美的电热电器制造有限公司 | Pressure cooking utensil and cooling control method thereof |
| CN105877475A (en) * | 2015-01-26 | 2016-08-24 | 佛山市顺德区美的电热电器制造有限公司 | Pressure cooking utensil and cooling control method thereof |
| CN104771066B (en) * | 2015-04-30 | 2016-12-07 | 珠海格力电器股份有限公司 | exhaust control method and device of electric pressure cooker and electric pressure cooker |
| CN105105626B (en) * | 2015-09-07 | 2017-06-09 | 佛山市顺德区美的电热电器制造有限公司 | A kind of electric pressure cooker control method, controller and electric pressure cooking saucepan |
| CN105935244A (en) * | 2016-05-26 | 2016-09-14 | 珠海格力电器股份有限公司 | Method and device for controlling pressure of electric pressure cooker and electric pressure cooker |
| CN107752745A (en) * | 2016-08-19 | 2018-03-06 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker and its cooking methods |
| CN108784322B (en) * | 2017-05-04 | 2020-11-27 | 佛山市顺德区美的电热电器制造有限公司 | Control method and device |
| CN108670151B (en) * | 2018-05-23 | 2022-02-18 | 佛山市顺德区美的洗涤电器制造有限公司 | Air pressure control method and device for drawer type dish washing machine and readable storage medium |
| CN110859507A (en) * | 2018-08-27 | 2020-03-06 | 佛山市顺德区美的电热电器制造有限公司 | Vacuum cooking appliance and method for identifying cooking amount in vacuum cooking appliance |
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| CN201384383Y (en) * | 2008-11-15 | 2010-01-20 | 方展崇 | Voltage-controlled type electric pressure cooker without bottom scorch |
| CN201312729Y (en) * | 2008-12-02 | 2009-09-23 | 何日英 | Intelligent pressure selecting and controlling electric pressure cooker |
| CN201814355U (en) * | 2009-09-30 | 2011-05-04 | 郭卫康 | High-efficiency energy-saving electric heating multi-purpose pot |
| CN101669761A (en) * | 2009-09-30 | 2010-03-17 | 郭卫康 | Efficient energy saving electro heating multipurpose cooker and new method of accurate temperature controlling and healthy cooking |
| CN101810430B (en) * | 2009-10-30 | 2011-11-16 | 美的集团有限公司 | Cooking control method of electric cooker |
| CN102293584B (en) * | 2011-06-14 | 2013-11-27 | 广东洛贝电子科技有限公司 | Electric pressure cooker for finely cooking rice and control method thereof |
| CN202281960U (en) * | 2011-10-24 | 2012-06-20 | 美的集团有限公司 | Cooking pressure selectable circuit of electric pressure cooker |
| CN202891584U (en) * | 2012-09-19 | 2013-04-24 | 格力电器（中山）小家电制造有限公司 | Electric pressure cooker control device |
| CN102920317A (en) * | 2012-11-08 | 2013-02-13 | 浙江绍兴苏泊尔生活电器有限公司 | Cooking method of electric heating appliance |
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