A method and control circuit for enabling and disabling a range hood

Abstract

The application discloses a kind of smoke machine start-stop control methods, comprising the following steps: step one, monitoring environment benchmark temperature: through temperature monitor, the benchmark temperature of stove environment is monitored, and the change of environment benchmark temperature is updated in real time;Step two, range hood starts: by judging the temperature change rate of pot, when the change rate meets the temperature rise requirement, and continuous temperature rise, finally temperature is stable and does not fall, then start the smoke machine;Step three, range hood is closed: by detecting the continuous drop of pot temperature, and meet the object temperature close to ambient temperature, and temperature rise does not occur in a certain time, then close the smoke machine.The smoke machine start-stop control method and control circuit provided by the application have high anti-interference performance, prevent false start: prevent indoor temperature from slowly rising, so as to automatically start the smoke machine;In the off state of the smoke machine, open the cover of the hot soup pot, the smoke machine will not be started by mistake;Prevent automatic smoke machine from shutting down by human factors.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smoke machine start-stop control, and particularly relates to a smoke machine start-stop control method and a control circuit. BACKGROUND

[0002] As an essential electrical appliance in the kitchen, the oil fume machine can quickly and rapidly discharge the oil fume generated in the cooking process to the outdoor, can greatly reduce the inhalation of the oil fume by the cook, and can effectively reduce the occurrence of respiratory diseases.

[0003] At present, most of the oil fume machines on the market are manually controlled to start and stop, cannot automatically control start and stop according to the change of the stove and the regional environment temperature, are not convenient to use, and often are turned on in advance when the oil fume machine is used, and often are forgotten to be turned off after cooking, thereby causing unnecessary loss.

[0004] Therefore, in order to solve the problems, the present application provides a smoke machine start-stop control method and a control circuit. SUMMARY

[0005] The smoke machine start-stop control method and the control circuit provided by the present application solve the problems that most of the oil fume machines on the market are manually controlled to start and stop, cannot automatically control start and stop according to the change of the stove and the regional environment temperature, are not convenient to use, and often are turned on in advance when the oil fume machine is used, and often are forgotten to be turned off after cooking, thereby causing unnecessary loss.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] A smoke machine start-stop control method comprises the following steps:

[0008] Step one, monitoring the environment reference temperature: monitoring the reference temperature of the stove environment through a temperature meter, and updating the change of the environment reference temperature in real time;

[0009] Step two, starting the oil fume machine: judging the temperature change rate of the stove, when the change rate meets the temperature rise requirement, and the continuous temperature rise, finally the temperature is stable and does not fall, recording the current stove temperature and the environment temperature, updating the environment reference temperature, the stove continues to rise to the number of times, then sending the start signal of the smoke machine, starting the smoke machine, performing the exhaust and heat dissipation, recording the current stove temperature and the environment temperature, and feeding back the data to update the environment reference temperature;

[0010] Step three, the range hood is closed: by detecting the continuous decrease of the stove temperature, and meeting the object temperature close to the ambient temperature, and the temperature does not rise in a period of time, the stove temperature is less than the temperature when the range hood is started, the stove temperature is close to the ambient reference temperature, the current stove temperature and the ambient temperature are recorded, the ambient temperature and the stove temperature are monitored, and the cumulative time is 2 minutes, the range hood is closed after 2 minutes, and the minimum ambient temperature and the minimum stove temperature are recorded. The temperature value is fed back to update the ambient reference temperature.

[0011] Preferably, the start and stop of the range hood is determined by the change of the ambient reference temperature and the stove temperature, and the ambient reference temperature and the stove temperature are checked by two circulating lines respectively for multiple times to ensure that the start and stop signal is sent by the single-chip microcomputer in the case that the temperature change trend continues.

[0012] Preferably, a range hood start and stop control circuit comprises a compensation circuit, an amplification circuit, a single-chip microcomputer and a range hood interface, the compensation circuit and the amplification circuit are connected to the single-chip microcomputer to form an electric signal loop, and the single-chip microcomputer is connected to the range hood interface and a main control board to deliver a control signal to the range hood to control the start and stop of the range hood.

[0013] Preferably, the compensation circuit and the amplification circuit are connected to the same controller, and the controller integrates a temperature sensor and a thermocouple sensor, the controller has four pins, three of which are used to connect the amplification circuit to provide the output voltage of the thermocouple, and the other pin of the controller is connected to the single-chip microcomputer through the compensation circuit to provide a temperature compensation voltage.

[0014] Preferably, the output voltage of the thermocouple sensor is amplified by a multiple through an operational amplifier in the amplification circuit before being delivered to the single-chip microcomputer.

[0015] Preferably, the model of the single-chip microcomputer is BF6958A.

[0016] The beneficial effects of the present application are:

[0017] 1. Start condition: by judging the temperature change rate of the stove, when the change rate meets the temperature rise requirement and the continuous temperature rise, and the final temperature is stable and does not fall, the range hood is started; high anti-interference performance and anti-misstart: prevent the indoor temperature from slowly rising to automatically start the range hood; the range hood is in the closed state, and the cover of the hot soup pot is opened, so the range hood will not be misstarted.

[0018] 2. Closing condition: by detecting the continuous decrease of the stove temperature, and meeting the stove temperature close to the ambient temperature, and the temperature does not rise in a period of time, the range hood is closed; prevent automatic closing of the range hood by human factors: during the normal heating process, the pot cover at room temperature is covered, and the range hood will not be automatically closed; during the normal heating process, the normal temperature water is added to the pot, and the range hood will not be automatically closed. Attached Figure Description

[0019] Fig. 1 This is a control flowchart of Embodiment 1 of the present invention.

[0020] Fig. 2 This is a circuit diagram of Embodiment 2 of the present invention. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] Reference Figs. 1-2 The present invention provides the following technical solution:

[0023] Example 1

[0024] Reference Fig. 2 As shown, a method for controlling the start and stop of a range hood includes the following steps:

[0025] Step 1: Monitor the ambient reference temperature: Monitor the reference temperature of the furnace environment using a thermometer and update the changes in the ambient reference temperature in real time;

[0026] Step 2, Range Hood Start-up: By judging the rate of temperature change of the stove, when the rate of change meets the temperature rise requirement and the temperature rises continuously until it stabilizes and does not drop, the current stove temperature and ambient temperature are recorded, and the ambient reference temperature is updated. When the stove temperature rises continuously for a certain number of times, a signal to start the range hood is sent to start the range hood, which performs exhaust and heat dissipation, and records the current stove temperature and ambient temperature, and updates the ambient reference temperature based on the feedback data.

[0027] Step 3: Range Hood Shutdown: The range hood is shut down when the stove temperature continuously decreases, reaches near the ambient temperature, and does not rise for a period of time. The stove temperature is lower than the temperature at which the range hood was started, and is close to the ambient reference temperature. The current stove and ambient temperatures are recorded. The range hood is then monitored for 2 minutes until both temperatures stop rising. After 2 minutes, a signal to shut down the range hood is issued, and the minimum ambient and minimum stove temperatures are recorded. The feedback data is then used to update the ambient reference temperature.

[0028] The start and stop of the range hood are jointly determined by changes in the ambient reference temperature and the stove temperature. The ambient reference temperature and the stove temperature are verified multiple times through two circulation lines to ensure that the microcontroller issues a start and stop signal when the temperature change trend is continuous.

[0029] Example 2

[0030] Reference Fig. 1The application discloses a smoke machine start-stop control circuit, which comprises a compensation circuit, an amplification circuit, a single-chip microcomputer and a smoke machine interface.

[0031] The compensation circuit and the amplification circuit are connected to the same controller, and the controller is integrated with a temperature sensor and a thermoelectric pile sensor.

[0032] The output voltage of the thermoelectric pile sensor is amplified by a plurality of times through an operational amplifier in the amplification circuit and is then transmitted to the single-chip microcomputer.

[0033] The model of the single-chip microcomputer is BF6958A.

[0034] In the application, the control circuit is connected to the smoke machine through the smoke machine interface, and the environment reference temperature and the furnace temperature are initialized.

[0035] During cooking, the furnace temperature is detected to be rapidly increased by the thermoelectric pile sensor, and the environment temperature in the region is detected to be correspondingly increased by the temperature sensor, the environment reference temperature is updated (certain conditions are required to be met), the weak voltage detected by the thermoelectric pile sensor is amplified by the amplification circuit by 100 times and then transmitted to the single-chip microcomputer according to the continuously increasing furnace temperature, the single-chip microcomputer calculates the current temperature increasing rate, judges whether the furnace temperature increasing rate meets the requirement, records the current furnace temperature and the environment temperature, and updates the environment reference temperature again (certain conditions are required to be met), the single-chip microcomputer sends a signal to start the smoke machine after the furnace temperature continuously increases to a certain number of times, the smoke machine is started, and the current furnace temperature and the environment temperature are recorded and fed back to the initial data.

[0036] When the cooking is finished, the furnace temperature is decreased, the furnace temperature is less than the temperature when the smoke machine is started, and the furnace temperature is close to the environment reference temperature, the current furnace temperature and the environment temperature are recorded, whether the environment temperature and the furnace temperature are increased is judged, the increase is accumulated for 2 minutes, a signal to stop the smoke machine is sent after 2 minutes, the smoke machine is stopped, the minimum environment temperature and the minimum furnace temperature are recorded, the environment reference temperature is updated again (certain conditions are required to be met), and the initial data is fed back.

[0037] In summary, the smoke machine is started when the temperature changing rate of the furnace meets the temperature increasing requirement and the temperature continuously increases and finally is stable, the anti-interference performance is high, the smoke machine is prevented from being started by mistake, the smoke machine is prevented from being started by mistake due to the slow increase of the indoor temperature, and the smoke machine is prevented from being started by mistake when the cover of the hot pot is opened in the off state of the smoke machine.

[0038] By detecting the continuous decrease of the stove temperature, and the stove temperature approaches the ambient temperature, and no temperature rise occurs within a certain time, the smoke machine is closed; Preventing artificial factors from automatically closing the smoke machine: normal heating process, cover the normal temperature pot cover, will not automatically close the smoke machine; Normal heating process, add normal temperature water to the pot, will not automatically close the smoke machine.

[0039] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art in the technical range disclosed by the present application, according to the technical scheme and the invention concept of the present application, equivalent replacement or change, should be covered in the protection scope of the present application.

Claims

1. A method for controlling the start and stop of a range hood, characterized in that, Includes the following steps: Step 1: Monitor the ambient reference temperature: Monitor the reference temperature of the furnace environment using a thermometer and update the changes in the ambient reference temperature in real time; Step 2, Range Hood Start-up: By judging the rate of temperature change of the stove, when the rate of change meets the temperature rise requirement and the temperature rises continuously until it stabilizes and does not drop, the current stove temperature and ambient temperature are recorded, and the ambient reference temperature is updated. When the stove temperature rises continuously for a certain number of times, a signal to start the range hood is sent to start the range hood, which performs exhaust and heat dissipation, and records the current stove temperature and ambient temperature, and updates the ambient reference temperature based on the feedback data. Step 3: Range Hood Shutdown: The range hood is shut down when the stove temperature continuously decreases, approaches the ambient temperature, and does not rise for a period of time. The stove temperature is lower than the temperature at which the range hood was started, and is close to the ambient reference temperature. The current stove and ambient temperatures are recorded. The range hood is monitored for 2 minutes until both ambient and stove temperatures stop rising. After 2 minutes, a signal to shut down the range hood is issued, and the minimum ambient and minimum stove temperatures are recorded. The feedback data is then used to update the ambient reference temperature. The start and stop of the range hood are jointly determined by changes in the ambient reference temperature and the stove temperature. The ambient reference temperature and the stove temperature are verified multiple times through two circulation lines to ensure that the microcontroller issues a start and stop signal when the temperature change trend is continuous.

2. A range hood start / stop control circuit, controlled by the range hood start / stop control method of claim 1, characterized in that, It includes a compensation circuit, an amplifier circuit, a microcontroller, and a tobacco hood interface. The compensation circuit and the amplifier circuit are connected to the microcontroller to form an electrical signal loop. The microcontroller is externally connected to the tobacco hood interface and the main control board to send control signals to the tobacco hood and control the start and stop of the tobacco hood.

3. The start / stop control circuit for a range hood according to claim 2, characterized in that, The compensation circuit and the amplification circuit are connected to the same controller, and the controller integrates a temperature sensor and a thermopile sensor. The controller has four pins, three of which are used to connect to the amplification circuit to provide the output voltage of the thermopile. The other pin of the controller is used to connect to the microcontroller through the compensation circuit to provide the temperature compensation voltage.

4. The start / stop control circuit for a range hood according to claim 3, characterized in that, The output voltage of the thermopile sensor is amplified by a factor of several by an operational amplifier in the amplifier circuit before being transmitted to the microcontroller.

5. The start / stop control circuit for a range hood according to claim 2, characterized in that, The microcontroller is model BF6958A.

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