Constant-temperature stove capable of controlling internal environment is composed of temperature controller, temperature sensor and dual-power driving mode

Abstract

At present, in the prior art, a mechanical type cannot accurately control temperature, but a semiconductor type needs to dissipate heat, the service life of a semiconductor power tube is influenced by long-time overheating, and a temperature adjusting mode of an existing electric food warmer is fixed increment and decrement each time, so that contradiction is generated between rapid adjustment and accurate adjustment. According to the electric food warmer, the temperature controller in a mechanical mode and the thermal power execution device are connected in series to play a role in double-insurance overheating protection, meanwhile, semiconductor and relay dual-mode control is added, the maximum current with the maximum power is distributed to the relay, the power burden of a semiconductor power tube is reduced, and the service life of the electric food warmer is prolonged. And the multi-level automatic increment change of the knob and the temperature increase and decrease amount switching of the knob are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of controllable internal environment constant temperature stove. BACKGROUND

[0002] The power mode of the electric cooker in the prior art is divided into mechanical mode and electronic mode. The mechanical version without temperature sensor cannot achieve double over-temperature protection, and the electronic version without temperature sensor cannot achieve double over-temperature protection. The mechanical version cannot accurately control the temperature, but the semiconductor version needs heat dissipation, which affects the service life of the semiconductor power tube for a long time. Moreover, the current electric cooker has a fixed increase or decrease amount for temperature adjustment every time. If the adjustment is one degree every time, it will be very slow. If the adjustment is five or ten degrees every time, it is fast, but sometimes it is necessary to be accurate to one degree, and it cannot be adjusted. Moreover, there is no multi-level time adjustment, and the increase or decrease amount of time cannot be automatically changed on a knob. Because it is necessary to increase or decrease one minute every half an hour, it is not necessary to increase or decrease one or two minutes more than half an hour, which can be five minutes. It is not necessary to increase or decrease five minutes more than one hour, which can be ten minutes. It is fast and accurate. Moreover, the current electric cooker cannot display the ambient temperature. SUMMARY

[0003] Controllable internal environment thermostat type The invention patent (patent number) of the previous application, the patent research and development is completed in preparation for production, at the same time put forward new technical scheme. The mechanical mode temperature controller and thermal power executor device in series play a double insurance overheat protection role, and the semiconductor and relay double mode control are added, the maximum power and the maximum current are divided to the relay, the power burden of the semiconductor power tube is reduced, because the power tube has a certain voltage drop, so the heat dissipation of the power tube and energy saving are reduced, and the service life of the silicon controlled rectifier is prolonged due to the influence of high environmental temperature. Because the rotary encoder has a press key and a rotary key, the two rotary encoders of each time period can set the mode, the temperature size, the power size and the time length through the press rotary, and the rotary encoder for setting the time length has a press key which is not used, which can be used to set the size of the increase of the set temperature each time. Generally, it can be set to 1 or 5, that is, the press key is switched from 1 to 5 or 5 to 1. The increase of the modified temperature is 1 or 5, which can be freely set. Because the part of the multi-level setting has been applied for a patent and the actual production effect is very good, one rotation of the knob can reach several hours, and one rotation back can reach several minutes. Compared with the electric heating pot on the market, the key or the rotary knob without multi-level setting is more convenient. At the same time, the default current temperature display is the internal environment temperature of the internal environment thermostat, that is, the medium temperature of the thermal power executor device heating. When the electric heating pot is not heating, the current environment and the medium temperature are consistent, that is, the room temperature. After heating, the medium temperature is displayed. Now they are put together to constitute the whole technical scheme.The specific scheme is: a controllable internal environment thermostat, which is characterized by a temperature controller, a temperature sensor and a double power driving technology scheme. The internal environment thermostat hot power executor and the temperature controller are connected in series to form a circuit. The controllable internal environment thermostat has a thyristor and a relay driver device. The microcontroller of the controllable internal environment thermostat can control the thyristor driver device to drive the thyristor to turn on and connect the above-mentioned circuit to supply power current to heat the internal environment medium of the controllable internal environment thermostat. The microcontroller can also control the relay driver device to drive the relay to connect the above-mentioned circuit to supply power current to heat the internal environment medium of the controllable internal environment thermostat. The medium is used to heat a pot. Preferably, when the maximum power is executed in each time period power mode of the controllable internal environment thermostat, the microcontroller of the controllable internal environment thermostat controls the driving element of the relay to drive the relay to connect the above-mentioned circuit to supply power current to heat the internal environment medium of the controllable internal environment thermostat. At this time, the microcontroller controls the thyristor to be non-conductive, and the pot is heated by the internal environment medium. The rotation of the rotary encoder of the man-machine interaction device of the controllable internal environment thermostat triggers the increase or decrease of the length value of the current period, which is different according to the length value of the current period. The optimal scheme of the present patent is that only two rotary encoders are needed to set parameters in each time period. The first rotary encoder in each time period is pressed to switch the current period to power mode or temperature mode. At the same time, the microcontroller of the controllable internal environment thermostat controls the indicator light or display device to indicate that the current period is in power or temperature mode. In the power mode, the first rotary encoder is rotated to modify the power size of the current period output and display. In the temperature mode, the first rotary encoder is rotated to modify the expected internal environment temperature value and display. The other rotary encoder in the current period is rotated to modify the length value of the current period. At the same time, the press key of the other rotary encoder is used to switch the size of each incremental or decremental value of the first rotary encoder modifying the expected internal environment temperature value. When the regulation of all time periods of the controllable internal environment thermostat is completed, the internal environment thermostat enters the internal environment automatic thermostat holding stage, and the holding indicator light is lit. The controllable internal environment thermostat includes any heat-conducting medium as the internal environment, and is not limited to using an electric heating plate as the heating medium to heat the pot. The internal environment of the present invention includes but is not limited to the electric heating plate of the electric kettle and various heat-conducting media. The heating plate is not limited to being fixedly installed on a metal tray, and the metal tray is installed on the stove shell of the controllable internal environment thermostat. The temperature controller is not limited to being installed on the tray or together with the temperature sensor on the heating plate, which constitutes the overall technical scheme of the patent.

[0004] Figure 1 The circuit schematic diagram of the present patent.

[0005] Figure 2 For the patent circuit board physical map.

[0006] Figure 3 For the patent temperature sensor and temperature controller installation instructions Embodiment:

[0007] A controllable inner environment thermostat stove is characterized by a temperature controller and a temperature sensor and a double power driving technical solution, wherein the inner environment thermostat stove thermal power execution device and the temperature controller are connected in series to form a circuit, the controllable inner environment thermostat stove has both a silicon controlled rectifier and a driver of the silicon controlled rectifier, a relay and a driver of the relay, the microcontroller of the controllable inner environment thermostat stove can control the driver of the silicon controlled rectifier to drive the silicon controlled rectifier to turn on to connect the above-mentioned circuit to supply power current to heat the inner environment medium of the controllable inner environment thermostat stove, and can also control the driver of the relay to drive the relay to connect the above-mentioned circuit to supply power current to heat the inner environment medium of the controllable inner environment thermostat stove, the medium is used for heating a pot, preferably: when the maximum power is executed in each time period power mode of the controllable inner environment thermostat stove, the microcontroller of the controllable inner environment thermostat stove controls the driving element of the relay to drive the relay to connect the above-mentioned circuit to supply power current to heat the inner environment medium of the controllable inner environment thermostat stove, at this time the microcontroller controls the silicon controlled rectifier not to turn on, and the pot is heated by the inner environment medium; the rotation of the rotary encoder of the man-machine interaction device of the controllable inner environment thermostat stove triggers the increase and decrease of the length value of the current time period, which is different according to the length value of the current time period, the optimal technical solution of the present patent: only two rotary encoders are needed to set parameters in each time period, the first rotary encoder in each time period is pressed to switch the current time period to a power mode or a temperature mode, at the same time the microcontroller of the controllable inner environment thermostat stove controls the indicator light or display device to indicate that the current time period is in the power mode or the temperature mode, in the power mode the first rotary encoder is rotated to modify the power size output by the current time period and display, in the temperature mode the first rotary encoder is rotated to modify the expected inner environment temperature value and display, the other rotary encoder in the current time period is rotated to modify the length value of the current time period, at the same time the press key of the other rotary encoder is used to switch the size of each incremental or decrement of the expected inner environment temperature value modified by the first rotary encoder, at the same time when the regulation of all time periods of the controllable inner environment thermostat stove is completed, the inner environment thermostat stove enters an inner environment automatic thermostat holding stage and the holding indicator light is lit, the controllable inner environment thermostat stove includes any heat-conducting medium as the inner environment and is not limited to using an electric heating plate as the heating medium to heat the pot, the "inner environment" of the present invention includes but is not limited to the electric heating plate of the electric food warmer and various heat-conducting media, and is not limited to fixing the heating plate and the pot together, the heating plate is not limited to being fixedly installed on a metal tray and the metal tray is installed on the stove body shell of the controllable inner environment thermostat stove, the temperature controller is not limited to being installed on the tray or together with the temperature sensor on the heating plate, which constitutes the overall technical solution of the present patent.

[0008] As Figure 1The circuit schematic diagram of the embodiment of the application is shown: the circuit control principle of the temperature controller, the relay and the thyristor is explained, the default algorithm of the circuit is to preferentially execute the first period as long as there is time in the first period, when the single-chip microcomputer sets the maximum power and the time length of the current period is not 0, the maximum power output of the current period, the single-chip microcomputer controls the relay to be turned on to supply power to the circuit of the heat power executor, at the same time (at this time) the microcontroller controls the thyristor to be not turned on, so that the thyristor does not bear the maximum voltage drop of the maximum power, the heat dissipation of the thyristor is reduced, the energy saving effect and the service life are improved, the execution of other power settings or temperature settings is controlled by the microcontroller to control the thyristor to execute the relay open circuit, the relay therein can be connected in parallel with the diode to provide a release channel for the storage capacity of the electromagnetic coil. The thyristor therein can be connected in parallel with the resistance-capacitance to absorb to protect the thyristor. The microcontroller algorithm for constant temperature and temperature preservation described in the specification can adopt the PID temperature control algorithm. The "internal environment" described in the application includes but is not limited to the electric heating disc of the electric heating pot and various heat-conducting media. As shown in FIG. 2: it is a real-time way of the man-machine interaction interface of the application: the temperature increment and decrement, which is written in the program in advance and downloaded to the single-chip microcomputer, when the user presses the rotary encoder for setting the time length of the current period, the single-chip microcomputer detects the button pressing or releasing to switch the temperature increment and decrement, at this time, rotating the temperature adjustment rotary encoder of the current period will change the temperature increment and decrement, for example, the temperature increment and decrement is 5 degrees Celsius before, after switching, the temperature increment and decrement is 1 degree Celsius, of course, it can also be switched back to 5 degree increment and decrement setting, at the same time, after the control of all time periods of the controllable internal environment constant temperature stove is completed, the system enters the automatic constant temperature and temperature preservation stage of the internal environment, and the temperature preservation indicator light is lit, as for the increment and decrement of the rotary encoder triggered each time, the increment and decrement can be determined according to the level of the variable parameter of the time length stored in the microcontroller in each time period through logical control, when the time length is set within 30 minutes, the increment and decrement of the rotary encoder triggered each time is 1, when it exceeds 30 minutes, the increment and decrement of the rotary encoder triggered each time is 5, when it exceeds one hour, the increment and decrement of the rotary encoder triggered each time is 10.For example, the two time periods used in the product: the human-computer interaction device uses two rotary encoders in each time period. Since the prior art single-chip microcomputer connected with the rotary encoder can detect the forward rotation, reverse rotation, and pressing of each rotary encoder, the pressing of the first rotary encoder in each time period selects the power mode or the temperature mode, and the mode state is saved by the microcontroller internal register and the microcontroller controls the temperature mode indicator or the power mode indicator to light up for indicating the current mode of the time period. According to the state, if the current state of the time period is the power mode, the power size is modified by rotating the first rotary encoder. According to the state, if the current state of the time period is the temperature mode, the temperature size is modified by rotating the first rotary encoder. The other rotary encoder in the time period is modified by rotating for the time length of the time period, and the pressing key of the other rotary encoder is used to switch the temperature setting of the time period to increase or decrease by the size of each increment or decrement. At the same time, the human-computer interaction device, the controllable inner environment thermostat, the default current temperature of each time period when starting, the temperature value of the medium, or the medium temperature is multiplied by the value of the temperature setting of each increment or decrement after being divided by the result of the temperature setting of each increment or decrement. Figure 2 For example, the inner environment temperature detected by the temperature sensor is 26 degrees, and the temperature setting of each increment or decrement is 5, so the default and displayed temperature when starting each time period is 26 divided by 5, which is 5, and then multiplied by 5, which is 25. Figure 3 The controllable inner environment thermostat uses an electric heating disc as the inner environment medium, the electric heating disc is installed on a tray, and the tray is installed on the stove shell of the controllable inner environment thermostat. The product currently uses a thermocouple as a temperature sensor, and a patch-type thermocouple is installed on the heating disc by screws. Since the heating disc is installed on the tray, the temperature limiter can be installed on the heating disc or the tray by screws.

Claims

1. A controllable internal environment thermostat stove by temperature controller and temperature sensor and double power drive technical scheme, characterized in that: The internal environment thermostat power executor device and the temperature controller are connected in series to form a circuit, the controllable internal environment thermostat has both a silicon controlled rectifier and a driver device of the silicon controlled rectifier, a relay and a driver device of the relay, the microcontroller of the controllable internal environment thermostat can control the driver device of the silicon controlled rectifier to drive the silicon controlled rectifier to turn on to connect the above-mentioned circuit to supply power current to heat the internal environment medium of the controllable internal environment thermostat, and can also control the driver device of the relay to drive the relay to connect the above-mentioned circuit to supply power current to heat the internal environment medium of the controllable internal environment thermostat, the medium is used for heating a pot, preferably: when the controllable internal environment thermostat executes maximum power in each time period power mode, the microcontroller of the controllable internal environment thermostat controls the driving element of the relay to drive the relay to connect the above-mentioned circuit to supply power current to heat the internal environment medium of the controllable internal environment thermostat, at this time the microcontroller controls the silicon controlled rectifier not to turn on, and the pot is heated by the internal environment medium; the rotation of the rotary encoder of the man-machine interaction device of the controllable internal environment thermostat triggers the increase and decrease of the length value of the current time period, and the amount of increase and decrease is different according to the length value of the current time period, the optimal embodiment of the present application: only two rotary encoders are needed to set parameters in each time period, the first rotary encoder in each time period is pressed to switch the current time period to power mode or temperature mode, and the microcontroller of the controllable internal environment thermostat controls the indicator or display device to indicate that the current time period is in power mode or temperature mode, in the power mode, the first rotary encoder is rotated to modify the power size output by the current time period and display, in the temperature mode, the first rotary encoder is rotated to modify the expected internal environment temperature value and display, the other rotary encoder in the current time period is rotated to modify the length value of the current time period, and the press key of the other rotary encoder is used to switch the size of each incremental or decremental value of the expected internal environment temperature value modified by the first rotary encoder, when the regulation of all time periods of the controllable internal environment thermostat is completed, the internal environment thermostat enters an internal environment automatic thermostat holding stage, and the holding indicator is lit, the possible internal environment thermostat includes any heat-conducting medium as the internal environment, and is not limited to using an electric heating plate as the heating medium to heat the pot, the internal environment of the present application includes but is not limited to the electric heating plate of the electric food warmer and various heat-conducting media, and is not limited to fixing the heating plate and the pot together, the heating plate is not limited to being fixedly installed on a metal tray, and the metal tray is installed on the stove shell of the controllable internal environment thermostat, and the temperature controller is not limited to being installed on the tray or together with the temperature sensor on the heating plate, which constitutes the overall technical solution of the present application.

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