Range hood control system and intelligent range hood

Abstract

The utility model discloses a range hood control system and an intelligent range hood, belongs to the technical field of range hoods, and particularly relates to gas safety. The problem that once a resident cannot receive alarm information in time or deals with the alarm information improperly, gas explosion accidents or gas poisoning and other phenomena are likely to happen when a special gas alarm is adopted to give an alarm for gas leakage is solved. The system comprises a timing control module, a sensor detection module and a microprocessor, and the microprocessor is in signal connection with an exhaust fan of the range hood. The range hood control system is suitable for ventilation of kitchen space.

Description

TECHNICAL FIELD

[0001] The utility model relates to range hood technical field especially relates to gas safety. BACKGROUND

[0002] As the unified fuel energy of the residential area in urban areas, gas can improve environmental protection compared with traditional fuels such as coal and straw, and unified pipelines are convenient to manage and relatively safe. The widespread use of gas is accompanied by gas stoves and range hoods, which have become essential kitchen appliances.

[0003] In daily life, gas leakage is easily caused by aging of gas pipelines or kitchen equipment. Currently, gas leakage alarms in homes mostly use special gas alarms to alarm gas leakage and inform residents of the situation. However, if residents do not receive the alarm information in time or handle it improperly, it may cause gas explosion accidents or coal gas poisoning. Gas explosion accidents can cause great damage to residents in the household and may extend to others and infrastructure. The cause of such accidents is the high concentration of gas in the kitchen caused by gas leakage without the knowledge of people.

[0004] At the same time, the exhaust method of the range hood mostly uses a manual switch to exhaust and exhaust smoke. If the switch is not turned off in time, it may cause a certain degree of waste of electric energy. If the exhaust fan is forgotten to be turned on when the temperature of the range hood in the kitchen is too high or the smoke concentration is too high, it may even cause a fire or other serious accidents. INVENTION CONTENTS

[0005] The utility model provides a range hood control system, which aims to ventilate the air in the kitchen through the range hood (exhaust fan) to avoid high gas concentration in the kitchen caused by gas leakage and prevent gas explosion accidents to improve the safety of gas use.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The range hood control system comprises a timing control module, a sensor detection module, and a microprocessor.

[0008] The timing control module is used to time according to the preset timing start time and timing stop time, obtain a timing control signal, and send the timing control signal to the microprocessor. The timing control signal comprises a timing start signal and a timing stop signal.

[0009] The sensor detection module is used to monitor the environment in the kitchen and send the detected environment monitoring data to the microprocessor. The environment monitoring data comprises gas concentration data.

[0010] The microprocessor is used for signal connection with the exhaust fan of the range hood;

[0011] The microprocessor is used for switching working modes according to the gas concentration data, and the working modes include a sensor working mode and a timing working mode; and

[0012] The microprocessor is further used for sending start-stop signals and rotating speed driving signals to the exhaust fan of the range hood according to the environmental monitoring data in the sensor working mode; and

[0013] The microprocessor is further used for sending start-stop signals to the exhaust fan of the range hood according to the timing control signals in the timing working mode.

[0014] Further, a preferred embodiment is provided, and the system further comprises a user interaction module;

[0015] The user interaction module is in signal connection with the microprocessor;

[0016] An input unit and a display unit are arranged on the user interaction module;

[0017] The input unit is used for presetting or adjusting the timing start time and the timing stop time;

[0018] The display unit is used for displaying the current timing time, the environmental monitoring data and the working state of the exhaust fan of the range hood.

[0019] Further, a preferred embodiment is provided, and the input unit is a button or a touch screen.

[0020] Further, a preferred embodiment is provided, and the sensor detection module comprises a temperature sensor, a humidity sensor, a smoke concentration sensor and a gas concentration sensor;

[0021] The temperature sensor, the humidity sensor, the smoke concentration sensor and the gas concentration sensor are respectively connected with the microprocessor through signal lines.

[0022] Further, a preferred embodiment is provided, and the temperature sensor, the humidity sensor and the smoke concentration sensor are arranged at the air inlet of the exhaust fan of the range hood.

[0023] The gas concentration sensor is arranged at a position convenient for detecting the gas concentration.

[0024] Further, a preferred embodiment is provided, and the system further comprises an alarm module:

[0025] The alarm module is in signal connection with the microprocessor.

[0026] Further, a preferred embodiment is provided, and the system further comprises a wireless communication module:

[0027] The microprocessor communicates with the mobile terminal through a wireless communication module.

[0028] Further, a preferred embodiment is provided, wherein the timing control module is a timer.

[0029] The timer is used for tracking the current time and comparing the current time with preset timing start time and timing stop time to obtain an interrupt signal as the timing control signal.

[0030] The utility model provides a kind of intelligent range hood, including range hood body and the range hood control system of any above described;

[0031] The exhaust fan of the range hood body is connected with the microprocessor signal.

[0032] The utility model has the following beneficial effects:

[0033] 1.The range hood control system of the utility model, under the condition of not affecting the normal use of range hood, increase the automatic start-stop function (i.e.

[0034] 2.The range hood control system of the utility model, the range hood and gas stove are all necessary kitchen utensils for home, and the kitchen space is ventilated by controlling the start-stop of range hood to reduce the influence of gas leakage.

[0035] 3.The range hood control system of the utility model, by the timing start-stop function or according to sensor data control range hood start-stop, on the one hand, the range hood (exhaust fan) can be closed in time, on the other hand, the kitchen space can be ventilated during the idle time of range hood, which avoids high gas concentration caused by gas leakage, effectively expands the use of range hood, realizes one machine with multiple functions, and avoids the waste of electric energy.

[0036] The range hood control system of the utility model is suitable for ventilating the kitchen space. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0038] Figure 1 For an embodiment of the present application, the system structure diagram of the range hood control system. DETAILED DESCRIPTION

[0039] In order to make the technical scheme and advantages of the present application clearer, the specific embodiments of the present application will be further described in detail and completely in combination with the drawings. The various embodiments described below are only some preferred schemes of the present application, rather than all the embodiments. The various embodiments described below are intended to explain the present application, and cannot be understood as a limitation of the present application. The reasonable combination of the technical features defined in the various embodiments of the present application, and all the other embodiments obtained by those skilled in the art based on the embodiments of the present application without any creative effort, all belong to the protection scope of the present application.

[0040] In an embodiment, a range hood control system is provided, which comprises a timing control module, a sensor detection module and a microprocessor;

[0041] The timing control module is configured to time according to a preset timing start time and a timing stop time, obtain a timing control signal, and send the timing control signal to the microprocessor, wherein the timing control signal comprises a timing start signal and a timing stop signal.

[0042] The sensor detection module is configured to monitor the environment in the kitchen and send the detected environment monitoring data to the microprocessor, wherein the environment monitoring data comprises gas concentration data.

[0043] The microprocessor is configured to be signal-connected with an exhaust fan of the range hood.

[0044] The microprocessor is configured to switch the working mode according to the gas concentration data, wherein the working mode comprises a sensor working mode and a timing working mode.

[0045] The microprocessor is further configured to send start-stop signals and rotating speed driving signals to the exhaust fan of the range hood according to the environment monitoring data in the sensor working mode.

[0046] The microprocessor is further configured to send start-stop signals to the exhaust fan of the range hood according to the timing control signal in the timing working mode.

[0047] In the embodiment, the timing control module is a device that can time, such as a timer in a single-chip microcomputer, or an intermittent start-stop control circuit composed of a time relay, an AC contactor, an intermediate relay, a thermal relay, and the like.

[0048] Setting the timing start time and the timing stop time by using the timing control module, and timing to obtain the timing control signal are conventional techniques, and do not belong to improvements on the method.

[0049] In the embodiment, the sensor detection module can be a sensor, such as a photoelectric sensor, a temperature sensor, a humidity sensor, a smoke concentration sensor, a gas concentration sensor, and the like.

[0050] Detecting the environment state in the kitchen by using the sensor detection module is a conventional technique, and does not belong to improvements on the method.

[0051] In the embodiment, the microprocessor is configured to switch the working mode of the exhaust fan of the range hood according to the gas concentration data, and the working mode is:

[0052] If the gas concentration data is greater than a given threshold value, the working mode of the exhaust fan of the range hood is switched to the sensor working mode;

[0053] Otherwise, the working mode of the exhaust fan of the range hood is switched to the timing working mode.

[0054] The microprocessor switches the working mode of the exhaust fan of the range hood by comparing the gas concentration data with the given threshold value, which is a conventional technique, and does not belong to improvements on the method.

[0055] In the embodiment, the start-stop signal and the speed driving signal are sent to the exhaust fan of the range hood according to the environment monitoring data, for example:

[0056] When the gas concentration data is greater than a given threshold value (specifically, a given start threshold value), the start signal is sent, and the exhaust fan of the range hood starts to exhaust;

[0057] When the gas concentration data is less than a given threshold value (specifically, a given stop threshold value), the stop signal is sent, and the exhaust fan of the range hood stops to exhaust;

[0058] When the gas concentration data is in different intervals (specifically, a plurality of ranges can be demarcated by a plurality of threshold values), the speed driving signal is sent, so that the exhaust fan of the range hood works at different speeds.

[0059] Comparing the gas concentration data with different threshold values to control the start-stop and the speed of the exhaust fan is a conventional technique, and does not belong to improvements on the method.

[0060] In this embodiment, the microprocessor adjusts the working mode of the range hood according to the data obtained by the sensor detection module, controls the start-stop and rotation speed (or power, wind speed) of the exhaust fan of the range hood, so as to ensure that the air quality in the kitchen is optimal.

[0061] When the gas leakage in the kitchen is detected (i.e., the gas concentration data is greater than a given threshold), the working state of the exhaust fan of the range hood can be adjusted according to the gas concentration data, and the air in the kitchen is discharged in time to quickly reduce the gas concentration in the kitchen, so as to ensure the safety of persons and property.

[0062] In this embodiment, the structure of the control system of the range hood is improved.

[0063] The range hood control system comprises a timing control module, a sensor detection module, and a microprocessor.

[0064] The timing control module and the sensor detection module are respectively signal-connected with the microprocessor.

[0065] The microprocessor is signal-connected with the exhaust fan of the range hood.

[0066] The timing control module sends a timing control signal to the microprocessor.

[0067] The sensor detection module sends environmental monitoring data (including gas concentration data) to the microprocessor.

[0068] The microprocessor switches the working mode according to the environmental monitoring data, and sends start-stop signals and rotation speed driving signals to the exhaust fan of the range hood according to the timing control signal and the environmental monitoring data.

[0069] Compared with the conventional range hood, the range hood control system can be automatically started and stopped according to the user's preset time through the above-mentioned structure and signal transmission relationship, so that the range hood can automatically maintain the air quality in the kitchen by automatically discharging the air in the kitchen, and avoid the personnel gas poisoning or the indoor air reaching the explosion limit caused by gas leakage. Compared with other devices for avoiding gas leakage, the range hood control system fully utilizes the existing equipment in the kitchen (i.e., the range hood) without the need for additional exhaust equipment, thereby saving cost and being simple and convenient to construct.

[0070] In addition, in an embodiment, the system further comprises a user interaction module.

[0071] The user interaction module is signal-connected with the microprocessor.

[0072] The user interaction module is provided with an input unit and a display unit.

[0073] The input unit is used for presetting or adjusting the timing start time and the timing stop time.

[0074] The display unit is used for displaying current timing time, environment monitoring data and working state of the exhaust fan of the range hood.

[0075] In the embodiment, the input unit is a button or a touch screen.

[0076] In the embodiment, the display unit is a display screen or a touch screen.

[0077] In the embodiment, the user can preset or adjust the timing start time and the timing stop time through the input unit; the user interaction module sends the preset timing start time and the timing stop time to the microprocessor through the signal line; the microprocessor sends the preset timing start time and the timing stop time to the timing control module through the signal line; the timing control module is used for tracking current time and comparing the current time with the preset timing start time and the timing stop time to obtain a timing control signal.

[0078] In the embodiment, the user can view the current timing time, such as the preset timing start time and the timing stop time, through the display unit in real time, and also view how much time is left to reach the timing start time and how much time is left to reach the timing stop time.

[0079] In the embodiment, the user can view the environment monitoring data in the kitchen, such as the gas concentration data, through the display unit in real time, so as to conveniently know the air quality in the kitchen.

[0080] In the embodiment, the user can view the working state of the exhaust fan of the range hood, such as the start-stop state and the wind speed information, through the display unit in real time.

[0081] In addition, in an embodiment, the input unit is also used for setting the rotating speed (or the wind speed or power of the exhaust fan); the microprocessor sends a corresponding rotating speed driving signal to the exhaust fan of the range hood according to the set rotating speed.

[0082] In addition, in an embodiment, the sensor detection module includes a temperature sensor, a humidity sensor, a smoke concentration sensor and a gas concentration sensor.

[0083] The temperature sensor, the humidity sensor, the smoke concentration sensor and the gas concentration sensor are respectively connected to the microprocessor through signal lines.

[0084] In the embodiment, the sensor detection module is used for monitoring the environment (including the air condition) in the kitchen in real time, including the oil fume smoke concentration data, the temperature data, the humidity data and the gas concentration data.

[0085] In the embodiment, the gas concentration sensor can select a corresponding sensor according to the type of gas.

[0086] Further, in an embodiment, the temperature sensor, the humidity sensor and the smoke concentration sensor are all arranged at the air inlet of the exhaust fan of the range hood.

[0087] The gas concentration sensor is arranged at a position convenient for detecting the gas concentration.

[0088] In the embodiment, the temperature sensor can be used to monitor the oil fume temperature; the microprocessor can output different rotation speed driving signals according to the oil fume temperature, so that the exhaust fan of the range hood outputs different air speeds at different oil fume temperatures.

[0089] When the oil fume temperature is high, the exhaust fan of the range hood outputs higher air speed.

[0090] Similarly, different rotation speed driving signals can also be output according to the oil fume smoke concentration data and the humidity data, so as to adjust the air speed of the exhaust fan of the range hood, for example:

[0091] When the oil fume smoke concentration is high or the oil fume humidity is high, the exhaust fan of the range hood outputs higher air speed.

[0092] In addition, in an embodiment, the system further comprises an alarm module.

[0093] The alarm module is in signal connection with the microprocessor.

[0094] In the embodiment, the alarm module is a loudspeaker.

[0095] The loudspeaker is in signal connection with the microprocessor.

[0096] The microprocessor sends an alarm signal (for example, when the gas concentration data is greater than a given threshold value, an alarm signal is sent) according to the gas concentration data, and sends it to the loudspeaker; the loudspeaker emits an alarm sound according to the alarm signal.

[0097] The alarm signal sent according to the gas concentration data and the alarm sound emitted by the loudspeaker according to the alarm signal are both conventional technologies, and do not belong to the improvement of the method.

[0098] In addition, in an embodiment, the system further comprises a wireless communication module.

[0099] The microprocessor communicates wirelessly with the mobile terminal through the wireless communication module.

[0100] In the embodiment, the mobile terminal can be a mobile phone, a tablet computer or the like.

[0101] In the embodiment, the microprocessor can send the current timing time, the environment monitoring data and the working state of the exhaust fan of the range hood to the mobile terminal through wireless communication; and the mobile terminal displays the current timing time, the environment monitoring data and the working state of the exhaust fan of the range hood.

[0102] In the embodiment, the microprocessor can send the alarm signal to the mobile terminal through wireless communication; and the mobile terminal sends an alarm prompt according to the alarm signal.

[0103] In the embodiment, the mobile terminal can send the preset timing start time and timing stop time to the microprocessor through wireless communication.

[0104] In the embodiment, the wireless communication is used to transmit data, which is a conventional technical means and is not an improvement on the method.

[0105] In addition, in an embodiment, the timing control module is a timer.

[0106] The timer is used to track the current time and compare the current time with the preset timing start time and timing stop time to obtain an interrupt signal as the timing control signal.

[0107] In the embodiment, the timer can be built in the microprocessor such as a single-chip microcomputer.

[0108] In addition, in an embodiment, the timer is at least two timers.

[0109] One timer is used to track the current time and compare the current time with the preset timing start time to obtain a start interrupt signal as the timing start signal.

[0110] The other timer is used to track the current time and compare the current time with the preset timing stop time to obtain a stop interrupt signal as the timing stop signal.

[0111] In addition, in an embodiment, if a single-chip microcomputer is used as the microprocessor, the timer, interrupt and GPIO (general-purpose input / output) port hardware resources can be used in combination with a common software program to realize the timing start and stop.

[0112] Hardware resource preparation:

[0113] One timer: used to generate an interrupt signal.

[0114] GPIO port: used to send a start / stop signal. The control signal of the exhaust fan can be connected to a certain GPIO port of the single-chip microcomputer, and the start / stop signal can be sent by controlling the level state of the port to realize the start / stop control of the exhaust fan.

[0115] Common software program:

[0116] Initialize the timer: After the single-chip microcomputer is started, the timer needs to be initialized and set first. The initial value of the timer needs to be calculated and set according to the clock frequency of the single-chip microcomputer and the resolution of the timer, to ensure that the timer can generate an interrupt after the user-pre-set timing start time.

[0117] Interrupt service program: When the timer reaches the set timing start time, an interrupt signal will be generated. The existing common interrupt service program is used to process this interrupt signal. In the interrupt service program, a flag bit or variable can be set to indicate that the timer has reached the set timing start time.

[0118] Main loop program: In the main loop program, the state of the timer interrupt flag bit or variable needs to be checked constantly. When the flag bit or variable is set, it indicates that the timer has reached the set timing start time, at which time the start-stop signal can be sent by controlling the level state of the GPIO port.

[0119] Implement timing off: After starting the exhaust fan, another timer (or the same timer but with a new initial value) can be started to count. When this timer reaches the set timing stop time, an interrupt signal will also be generated. In the interrupt service program, the control signal can be set to low as the stop signal in the start-stop signal.

[0120] Reset the timer: After the exhaust fan stops, the timer is reset to start the next timing period of start-stop.

[0121] In addition, in an embodiment, the timing control module includes 2 time relays and an AC contactor.

[0122] The 2 time relays are used to track the current time and compare it with the pre-set timing start time and timing stop time, to change the opening and closing state of the main contact of the AC contactor as the timing control signal.

[0123] In this embodiment, one time relay is KT1 and the other is KT2. The time relays, AC contactor, intermediate relay, and thermal relay are used to jointly build a motor intermittent start-stop control circuit:

[0124] Required components and their functions:

[0125] Time relays (KT1, KT2): used to set the timing start time and timing stop time. KT1 sets the timing start time, and KT2 sets the timing stop time.

[0126] AC contactor (KM): used to send the start-stop signal to control the power on-off of the exhaust fan, to realize the start and stop of the exhaust fan.

[0127] Intermediate relay (KA): for auxiliary control, to realize self-locking and interlocking function of the circuit;

[0128] Thermal relay (FR): for protecting the circuit from damage of the exhaust fan in case of overload or open-phase overheating;

[0129] Circuit construction and implementation:

[0130] Construction of main circuit: the power supply is introduced by the circuit breaker QF, and the start and stop of the exhaust fan are controlled by the main contact of the AC contactor KM;

[0131] Construction of control circuit: composed of fuse FU, stop button, start button, intermediate relay KA, time relays KT1 and KT2, attracting coil and normally closed contact of the AC contactor KM, and thermal relay normally closed contact;

[0132] When the start button is pressed, the intermediate relay KA coil is powered, the normally open contact KA is closed and self-locked, and the time relay KT1 coil and the AC contactor KM coil are connected, the KM main contact is closed, and the exhaust fan starts to run;

[0133] KT1 starts timing, and when the preset timing stop time is reached, its delay normally open contact is closed and the delay normally closed contact is opened. At this time, the AC contactor coil loses power due to the opening of the KT1 delay normally closed contact, the normally closed contact KM resets, the main contact is opened, and the exhaust fan stops running.

[0134] At the same time, the time relay KT2 coil is powered due to the closure of the KT1 delay normally open contact, and KT2 starts timing. When the preset timing start time is reached, the KT2 delay open contact is opened, cutting off the KT1 coil loop. At this time, the KT1 delay normally open and delay normally closed are reset momentarily, the KM coil is connected again, and the exhaust fan starts to run again; at the same time, the KT2 coil is cut off, the delay normally closed contact resets, and the KT1 coil is powered again to start timing. This cycle is repeated to realize the intermittent start-stop control of the exhaust fan;

[0135] Construction of indication circuit: composed of KM normally closed contact and red indicator light in series. When the exhaust fan stops, the red indicator light is on; when the exhaust fan runs, the green indicator light is on;

[0136] Construction of protection circuit: provided by the thermal relay normally closed contact FR for overload protection; when the exhaust fan current is overloaded, the FR contact is opened, cutting off the control loop and stopping the exhaust fan from running.

[0137] In one embodiment, an intelligent range hood is provided, comprising a range hood body and a range hood control system according to any one of the above embodiments;

[0138] The exhaust fan of the range hood body is connected with the microprocessor signal.

[0139] The above further describes the technical solutions provided by the utility model through several specific embodiments, in order to highlight the advantages and beneficial effects of the technical solutions provided by the utility model, but the above several specific embodiments are not used as the limitation of the utility model, any reasonable change and improvement, reasonable combination and equivalent replacement of the embodiments, etc. based on the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A control system for a range hood, characterized in that The system comprises a timing control module, a sensor detection module and a microprocessor; The timing control module is configured to time according to a preset timing start time and timing stop time, obtain a timing control signal, and send the timing control signal to the microprocessor, wherein the timing control signal comprises a timing start signal and a timing stop signal; The sensor detection module is configured to monitor the environment in the kitchen and send the detected environment monitoring data to the microprocessor, wherein the environment monitoring data comprises gas concentration data; The microprocessor is configured to be signal-connected with an exhaust fan of the range hood; The microprocessor is configured to switch the working mode according to the gas concentration data, wherein the working mode comprises a sensor working mode and a timing working mode; and The microprocessor is further configured to send start-stop signals and rotation speed driving signals to the exhaust fan of the range hood according to the environment monitoring data in the sensor working mode; and The microprocessor is further configured to send start-stop signals to the exhaust fan of the range hood according to the timing control signal in the timing working mode.

2. The hood control system as claimed in claim 1, wherein, The system further comprises a user interaction module; The user interaction module is signal-connected with the microprocessor; The user interaction module is provided with an input unit and a display unit; The input unit is configured to preset or adjust the timing start time and the timing stop time; The display unit is configured to display the current timing time, the environment monitoring data and the working state of the exhaust fan of the range hood.

3. The hood control system as claimed in claim 2, wherein, The input unit is a button or a touch screen.

4. The hood control system as claimed in claim 1, wherein, The sensor detection module comprises a temperature sensor, a humidity sensor, a smoke concentration sensor and a gas concentration sensor; The temperature sensor, the humidity sensor, the smoke concentration sensor and the gas concentration sensor are respectively connected with the microprocessor through signal lines.

5. The hood control system as claimed in claim 4, wherein, The temperature sensor, the humidity sensor and the smoke concentration sensor are arranged at the air inlet of the exhaust fan of the range hood; The gas concentration sensor is arranged at a position convenient for detecting the gas concentration.

6. The hood control system as claimed in claim 1 wherein, The system further comprises an alarm module: The alarm module is signal-connected with the microprocessor.

7. The hood control system as claimed in claim 1, wherein, The system further comprises a wireless communication module: The microprocessor is wirelessly connected with a mobile terminal through the wireless communication module.

8. The hood control system as claimed in claim 1, wherein, The timing control module is a timer; The timer is configured to track the current time and compare the preset timing start time and the timing stop time to obtain an interrupt signal as the timing control signal.

9. An intelligent range hood, comprising a range hood body and a range hood control system according to any one of claims 1 to 8; The exhaust fan of the range hood body is signal-connected with the microprocessor.

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