Central Range Hood Exhaust Gas Control Method, Device and System

Abstract

The present application provides a smoke exhaust control method, device and system for a central range hood. The method is applied to the main control system of the central range hood, and the main control system is respectively connected to an automatic smoke sensing device, a plurality of terminal range hoods and a main engine fan. After at least one terminal range hood is started, a first smoke signal sent by the automatic smoke sensing device is received; the first smoke signal is obtained by the automatic smoke sensing device through real-time detection of the smoke in the common flue; a target smoke exhaust control signal is generated according to the first smoke signal and a preset reference signal; and the operation of the main engine fan is controlled according to the target smoke exhaust control signal. The present application can control the smoke exhaust operation of the main engine fan in real time according to the smoke signal collected by the automatic smoke sensing device. Even when the main control system cannot communicate normally with the terminal range hoods, the smoke can be discharged in time, avoiding the phenomenon that the cooking fumes are blocked in the flue and pour back into the homes of users on each floor.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and particularly to a smoke exhaust control method, device and system for a central range hood. Background Art

[0002] Most of the existing kitchen range hoods adopt the external exhaust type for smoke exhaust, which has a great impact on the environment. With the increasing emphasis on environmental protection, the central range hood has emerged as the times require. The central range hood can uniformly filter and purify and discharge the oil fume in the common flue. In this way, the main unit on the roof needs to be communicatively connected with the range hoods or air valves on each floor, so as to facilitate the product linkage of smoking, smoke exhaust and filtration for each floor of the whole unit of each building.

[0003] Due to the influence of the common flue in the product application scenario, currently basically wireless communication methods are adopted. However, currently, whether it is the wireless communication method using RF radio frequency or the Lora module, there may be great instability in the wireless communication distance due to the narrow flue space, or the influence of co-frequency interference, resulting in poor communication between products. Or when using the cellular network, due to communication interruption, the main unit on the roof cannot be turned on or cannot be turned on in time, causing the oil fume to be blocked in the flue and pouring back into the households on each floor.

[0004] In view of the above problems, in some solutions, a method of using a repeater to achieve an intermediate bridging of wireless signals or pulling another antenna similar to the height of the flue to enhance signal transmission is adopted. However, both of these two methods have high costs, inconvenient construction, and may be affected by environmental wireless clutter interference. The transmission of wireless signals in space is limited, which has a great impact on the stability of wireless signal generation and still cannot ensure effective communication of the products. Summary of the Invention

[0005] The purpose of the present application is to provide a smoke exhaust control method, device and system for a central range hood, which can control the smoke exhaust operation of the main engine fan in real time according to the smoke signals collected by the automatic smoke sensing device. Even when the main control system and the terminal range hood cannot communicate normally, the smoke can be discharged in time, avoiding the phenomenon that the oil fume is blocked in the flue and pouring back into the households on each floor.

[0006] In a first aspect, an embodiment of the present application provides a method for controlling the smoke exhaust of a central range hood. The method is applied to the main control system of the central range hood, and the main control system is respectively connected to an automatic smoke sensor, multiple terminal range hoods, and a main fan; the central range hood is arranged at the top of a common flue; the multiple terminal range hoods are respectively communicated with the common flue; the method includes: after at least one terminal range hood is started, receiving a first smoke signal sent by the automatic smoke sensor; the first smoke signal is obtained by the automatic smoke sensor through real-time detection of the smoke in the common flue; generating a target smoke exhaust control signal according to the first smoke signal and a preset reference signal; and controlling the operation of the main fan according to the target smoke exhaust control signal.

[0007] Further, before the step of receiving the first smoke signal sent by the automatic smoke sensor, the method further includes: powering on and initializing the automatic smoke sensor, and determining a reference signal.

[0008] Further, the step of determining the reference signal includes: obtaining a first specified number of consecutive second smoke signals; the second smoke signal is a smoke signal collected by the automatic smoke sensor every first sampling time; calculating a first average value corresponding to the first specified number of second smoke signals; determining whether the first average value is within a first preset interval; if so, determining the first average value as the reference signal.

[0009] Further, the method further includes: obtaining a second specified number of consecutive third smoke signals; the third smoke signal is a smoke signal collected by the automatic smoke sensor every second sampling time, and the first difference between the third smoke signal and the reference signal is within a second preset interval; calculating a second average value corresponding to the second specified number of third smoke signals; determining whether the second difference between the second average value and the reference signal is within a third preset interval; if so, updating the reference signal with the second average value.

[0010] Further, the step of generating a smoke exhaust control signal according to the first smoke signal and the preset reference signal includes: determining a plurality of consecutive first smoke signals within a specified time; generating a smoke exhaust control signal according to the magnitude relationship and the difference magnitude between the plurality of consecutive first smoke signals and the reference signal.

[0011] Further, the step of generating a target smoke exhaust control signal according to the first smoke signal and the preset reference signal further includes: determining a plurality of consecutive first smoke signals within a specified time; generating a first smoke exhaust control signal according to the magnitude relationship and the difference magnitude between the plurality of consecutive first smoke signals and the reference signal; receiving the start-stop state signals of at least one terminal range hood, and generating a second smoke exhaust control signal according to the start-stop state signals; and determining the target smoke exhaust control signal according to the first smoke exhaust control signal and the second smoke exhaust control signal.

[0012] Furthermore, both the first smoke exhaust control signal and the second smoke exhaust control signal correspond to air volume levels; the step of determining the target smoke exhaust control signal according to the first smoke exhaust control signal and the second smoke exhaust control signal includes: determining the signal with the larger air volume level among the first smoke exhaust control signal and the second smoke exhaust control signal as the target smoke exhaust control signal.

[0013] Furthermore, the steps of determining multiple consecutive first smoke signals within a specified time; generating a smoke exhaust control signal according to the magnitude relationship and difference magnitude between the multiple consecutive first smoke signals and a reference signal; and the smoke exhaust control signal including the target smoke exhaust control signal or the first smoke exhaust control signal include: obtaining the current first smoke signal in real time, determining whether the current first smoke signal is greater than the reference signal, if not, continuing to execute the step of obtaining the current first smoke signal in real time; if so, determining whether the current third difference between the current first smoke signal and the reference signal is greater than a first set threshold, if not, continuing to execute the step of obtaining the current first smoke signal in real time; if so, determining whether multiple consecutive first smoke signals within the specified time are all greater than the reference signal; if not, continuing to execute the step of obtaining the current first smoke signal in real time; if so, determining the air volume level according to the current third difference, and generating a smoke exhaust control signal according to the air volume level.

[0014] Furthermore, the steps of determining multiple consecutive first smoke signals within a specified time; generating a smoke exhaust control signal according to the magnitude relationship and difference magnitude between the multiple consecutive first smoke signals and a reference signal further include: obtaining the current first smoke signal in real time, determining whether the current first smoke signal is less than the reference signal, if not, continuing to execute the step of generating a smoke exhaust control signal according to the air volume level; if so, determining whether the current fourth difference between the current first smoke signal and the reference signal is greater than a second set threshold, if not, continuing to execute the step of obtaining the current first smoke signal in real time; if so, determining whether multiple consecutive first smoke signals within the specified time are all less than the reference signal; if not, continuing to execute the step of obtaining the current first smoke signal in real time; if so, determining the smoke exhaust control signal as a stop smoke exhaust signal.

[0015] In a second aspect, an embodiment of the present application further provides a smoke exhaust control device for a central range hood. The device is applied to the main control system of the central range hood, and the main control system is respectively connected to an automatic smoke sensing device, a plurality of terminal range hoods, and a main machine fan; the central range hood is arranged at the top of a common flue; the plurality of terminal range hoods are respectively communicated with the common flue; the device includes: a smoke signal receiving module, configured to receive a first smoke signal sent by the automatic smoke sensing device after at least one terminal range hood is started; the first smoke signal is obtained by the automatic smoke sensing device through real-time detection of the smoke in the common flue; a control signal generating module, configured to generate a target smoke exhaust control signal according to the first smoke signal and a preset reference signal; a smoke exhaust control module, configured to control the operation of the main machine fan according to the target smoke exhaust control signal.

[0016] In a third aspect, an embodiment of the present application further provides a smoke exhaust control system for a central range hood. The system includes: a central range hood, a plurality of terminal range hoods, and an automatic smoke sensing device; the central range hood is arranged at the top of a common flue; the plurality of terminal range hoods are communicated with the common flue; the central range hood includes: a main control system and a main machine fan; the main control system is respectively connected to the automatic smoke sensing device, the plurality of terminal range hoods, and the main machine fan; the main control system is configured to execute the method described in the first aspect.

[0017] Further, the above automatic smoke sensing device is arranged at one of the following positions: in the central range hood, at the ventilation opening between the central range hood and the common flue, and at a designated position in the common flue.

[0018] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions cause the processor to implement the method described in the first aspect.

[0019] In the smoke exhaust control method, device and system for a central range hood provided by an embodiment of the present application, the method is applied to the main control system of the central range hood. The main control system is respectively connected to an automatic smoke sensing device, multiple terminal range hoods, and a main engine fan; the central range hood is arranged at the top of a common flue; multiple terminal range hoods are respectively communicated with the common flue; the method includes: after at least one terminal range hood is started, receiving a first smoke signal sent by the automatic smoke sensing device; the first smoke signal is obtained by the automatic smoke sensing device through real-time detection of the smoke in the common flue; generating a target smoke exhaust control signal according to the first smoke signal and a preset reference signal; and controlling the operation of the main engine fan according to the target smoke exhaust control signal. The embodiment of the present application can control the smoke exhaust operation of the main engine fan in real time according to the smoke signal collected by the automatic smoke sensing device. Even when the main control system cannot communicate normally with the terminal range hoods, the smoke can be discharged in time, avoiding the phenomenon that the oil fume blocks in the flue and backs up into the homes of users on each floor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0021] Figure 1 It is a schematic diagram of a smoke exhaust control system for a central range hood provided by an embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of another smoke exhaust control system for a central range hood provided by an embodiment of the present application;

[0023] Figure 3 It is a flowchart of a smoke exhaust control method for a central range hood provided by an embodiment of the present application;

[0024] Figure 4 It is a flowchart of smoke sensing and recognition provided by an embodiment of the present application;

[0025] Figure 5 It is a flowchart of reference value calibration provided by an embodiment of the present application;

[0026] Figure 6 It is an overall flowchart of smoke exhaust control for a central range hood provided by an embodiment of the present application;

[0027] Figure 7 It is a structural block diagram of a smoke exhaust control device for a central range hood provided by an embodiment of the present application; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some of the embodiments of the present application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0029] Currently, the communication method of the central range hood is wireless communication, including: Lora communication, cellular network, etc. Using wireless communication, the air valve body corresponding to the terminal range hood can report the on / off state of the range hood in real time, that is, send the start / stop state signal to the host in real time. The host can determine the size of the air volume according to the start / stop quantity of the terminal range hoods. Usually, the more the number of startups, the higher the air volume level. When there are problems with wireless communication, such as the Lora communication having the phenomenon of co-frequency interference, affecting communication, or due to the narrow space of the public flue in the building, the transmission distance of the RF or Lora communication method used is restricted, and most of them cannot directly complete the transmission of a distance of nearly 10 floors, resulting in the communication control instruction sometimes not reaching or directly losing data, which may cause the host on the roof not to start in time; or when using a cellular network, when the communication network is interrupted or the network signal is weak, the signal may be lost, and it cannot be ensured that the product signal reaches stably and communicates with each other, and it is easy to occur that the oil fume is blocked in the flue and backflows into the households on each floor. Based on this, the embodiments of the present application provide a central range hood smoke exhaust control method, device and system, which can effectively solve the above problems. For the convenience of understanding this embodiment, first, a central range hood smoke exhaust control system disclosed in the embodiments of the present application will be introduced in detail.

[0030] The embodiments of the present application also provide a central range hood smoke exhaust control system. Refer to Figure 1 As shown, the system includes: a central range hood 100, a plurality of terminal range hoods 200, and an automatic smoke sensing device 300; the central range hood 100 is arranged at the top of the public flue; the plurality of terminal range hoods 200 are communicated with the public flue; the central range hood 100 includes: a main control system 101 and a host fan 102; the main control system 101 is respectively connected to the automatic smoke sensing device 300, the plurality of terminal range hoods 200, and the host fan 102.

[0031] The above automatic smoke sensing device 300 can be arranged at one of the following positions: in the central range hood, at the ventilation opening of the central range hood and the public flue, or at a designated position in the public flue.

[0032] In this embodiment, after at least one terminal range hood is started, the automatic smoke detection device will detect the smoke in the common flue in real time and send the collected smoke signal to the main control system of the central range hood. The main control system can generate a corresponding target smoke exhaust control signal according to the received smoke signal and the preset reference signal, and control the operation of the main fan according to the target smoke exhaust control signal. For the specific implementation process, refer to the method embodiment below.

[0033] The following lists a preferred system embodiment. Refer to Figure 2 the schematic diagram of a central range hood smoke exhaust control system shown in the figure. This system includes: the central range hood main unit 1 (abbreviated as the main unit, the same as the above central range hood), the automatic smoke detection device 2, the main unit control system main board 3 (the same as the above main control system), the main unit wireless communication system and antenna 4, the air valve wireless communication system and antenna 5, the air valve body 6 (abbreviated as the air valve, representing the air valve bodies on each floor), and the terminal range hood 7 (representing the terminal range hoods on each floor).

[0034] Among them, the automatic smoke detection device 2, the main unit control system main board 3, and the main unit wireless communication system and antenna 4 are installed in the main unit 1 system. The main unit 1 is used for controlling and communicating with the main fan of the main unit. In the embodiment of the present application, the automatic smoke detection device 2 is set at the ventilation opening of the central range hood and the common flue, and is used for monitoring the smoke concentration in the common flue in real time, sensing the amount of smoke in the flue, and timely transmitting the smoke signal to the main unit control system main board 3 to timely control the operation state of the main unit. The main unit control system main board 3 is used for receiving the wireless information sent by the main unit wireless communication system and antenna 4 and the oil fume concentration information sent by the automatic smoke detection device 2 in real time, and performing smoke exhaust control on the main fan of the main unit.

[0035] The main unit wireless communication system and antenna 4 are used for communicating through the wireless network, enabling the main unit to query and receive the information of the air valve body 6, that is, realizing the function of two-way communication between the main unit and the valve bodies on each floor. The air valve wireless communication system and antenna 5 are installed in the air valve body 6 and are used for communicating through the wireless network, reporting the state of the air valve to the main unit, and enabling the main unit to perform smoke exhaust.

[0036] The control system in the air valve body 6 can sense the start-stop current of the terminal range hood 7 in real time to accurately identify the start-stop state of the range hood, and transmit the start-stop state signal to the air valve wireless communication system and antenna 5 for sending out and reporting to the main unit 1. The air valve body 6 simultaneously represents the air valve bodies on each floor, and the functions are the same. The terminal range hood 7 is used to absorb kitchen oil fume and odors and discharge the oil fume and ventilate through the air valve opening of the air valve body 6. The terminal range hood 7 represents the terminal range hoods on each floor, and the functions are the same.

[0037] In this embodiment, after at least one terminal range hood 7 is started, the automatic smoke detection device 2 will detect the smoke in the common flue in real time, and send the collected smoke signal to the main control system motherboard 3 of the central range hood main unit 1. The main control system motherboard 3 can generate a corresponding target exhaust control signal according to the received smoke signal and the preset reference signal, and control the operation of the main unit fan according to the target exhaust control signal. For the specific implementation process, please refer to the method embodiment below.

[0038] The central range hood exhaust control system provided by the embodiment of the present application can, through the cooperation of the central range hood main unit and the automatic smoke detection device, control the exhaust operation of the main unit fan in real time according to the smoke signal collected by the automatic smoke detection device. Even when the main control system and the terminal range hood cannot communicate normally, the smoke can be discharged in time, avoiding the phenomenon that the oil fume blocks in the flue and backs into the homes of users on each floor.

[0039] Based on the above system embodiment, the implementation process of the central range hood exhaust control method provided by the embodiment of the present application will be described in detail below. This method is applied to the main control system of the central range hood. The main control system is respectively connected to the automatic smoke detection device, multiple terminal range hoods, and the main unit fan; the central range hood is arranged at the top of the common flue; multiple terminal range hoods are respectively communicated with the common flue; Figure 3 The following is a flowchart of a central range hood exhaust control method provided by an embodiment of the present application. The method specifically includes:

[0040] Step S302, after at least one terminal range hood is started, receive the first smoke signal sent by the automatic smoke detection device; the first smoke signal is obtained by the automatic smoke detection device detecting the smoke in the common flue in real time.

[0041] In practical applications, after the terminal range hood is started, the smoke in the kitchen often discharges into the common flue through the terminal range hood. At this time, the automatic smoke detection device can collect the smoke concentration or smoke volume signal in the common flue in real time, that is, the above first smoke signal.

[0042] Step S304, generate a target exhaust control signal according to the first smoke signal and the preset reference signal.

[0043] In this step, the reference signal can be pre-set, or it can also be continuously calibrated and generated according to the actual situation. After the first smoke signal is obtained in real time, a smoke exhaust control signal can be further generated based on the first smoke signal and the pre-set reference signal. Specifically, the size of the air volume can be determined according to the size relationship and the difference between the first smoke signal and the reference signal, and then the corresponding smoke exhaust control signal can be generated. In addition, the control signal determined by the start-stop state signal of the terminal range hood in the prior art can also be combined to comprehensively generate the target smoke exhaust control signal.

[0044] Step S306, control the main engine fan to work according to the target smoke exhaust control signal.

[0045] In the smoke exhaust control method of the central range hood provided by the embodiment of the present application, the smoke exhaust operation of the main engine fan can be controlled in real time according to the smoke signal collected by the automatic smoke sensing device. Even when the main control system and the terminal range hood cannot communicate normally, the smoke can be discharged in time, avoiding the phenomenon that the oil fume is blocked in the flue and poured back into the homes of users on each floor.

[0046] The embodiment of the present application also provides another smoke exhaust control method for a central range hood, which is implemented on the basis of the above embodiment; this embodiment focuses on describing the generation process of the smoke exhaust control signal and the generation and calibration process of the reference signal.

[0047] In this embodiment, before the step of receiving the first smoke signal sent by the automatic smoke sensing device, the process of powering on and initializing the automatic smoke sensing device and determining the reference signal can also be included.

[0048] Specifically, obtain a continuous first specified number of second smoke signals; the second smoke signal is a smoke signal collected by the automatic smoke sensing device every first sampling time; calculate the first average value corresponding to the first specified number of second smoke signals; determine whether the first average value is within the first preset interval; if so, determine the first average value as the reference signal.

[0049] Taking the first specified number as 60 as an example for illustration, see Figure 4 As shown, when the automatic smoke sensing device is powered on, it will be initialized, and then preheated for 5 minutes to make the automatic smoke sensing device in a stable working state. At the 4th minute of preheating, the AD (analog-to-digital conversion) value of the automatic smoke sensing device can be read once per second, and a total of 60 AD values need to be continuously taken, and then the 60 AD values are averaged to obtain the average value , and then the average value is identified within the upper and lower limit values, and it is determined whether it is within the upper and lower limit values nx. If not, repeat reading 60 AD values for identification. If it is within the upper and lower limit values nx, the average value Set it as the reference value A (i.e., the reference signal), which is the reference standard judgment value for subsequent identification of the smoke concentration to obtain the reference.

[0050] In the process of adjusting the air volume based on the above reference signal and the smoke signal collected in real time, it is possible that the reference signal may deviate. At this time, it is necessary to correct it. The specific correction method is as follows:

[0051] (1) Obtain a continuous second specified number of third smoke signals; the third smoke signal is a smoke signal collected by the automatic smoke sensor every second sampling time, and the first difference from the reference signal is within the second preset interval.

[0052] For example, as shown in Figure 5 , read the AD value of an automatic smoke sensor every t3 seconds, and at the same time compare it with the reference value to obtain a comparison value. Take out the comparison value B (difference), and determine whether it is within a certain positive and negative fluctuation value n4. When it is within the fluctuation value n4, retain the current AD value and count, and it is necessary to continuously obtain n5 AD values within the fluctuation value n4; when it is greater than the positive and negative fluctuation value n4, clear the previous historical values and re-count until n5 AD values within the fluctuation value n4 are obtained.

[0053] (2) Calculate the second average value corresponding to the second specified number of third smoke signals; when n5 AD values within the fluctuation value n4 are obtained, take their average value .

[0054] (3) Determine whether the second difference between the second average value and the reference signal is within the third preset interval;

[0055] (4) If so, update the reference signal with the second average value.

[0056] Compare the average value with the current reference value A to obtain a comparison difference C. Determine whether the comparison difference C is within a certain positive and negative fluctuation value n6. If it is greater than the positive and negative fluctuation value n6, clear the previous historical values and re-count; if it is less than the positive and negative fluctuation value n6, the current average value can be updated as the reference value A, and the calibration of the reference value for this time is completed.

[0057] The following details the process of generating a smoke exhaust control signal based on the first smoke signal and the preset reference signal, which can include two methods:

[0058] The first method: Determine a plurality of consecutive first smoke signals within a specified time; generate a target smoke exhaust control signal according to the magnitude relationship and difference magnitude between the plurality of consecutive first smoke signals and the reference signal.

[0059] The second type: Determine multiple consecutive first smoke signals within a specified time; generate a first smoke exhaust control signal according to the magnitude relationship and difference magnitude between the multiple consecutive first smoke signals and a reference signal respectively; receive the start / stop status signals of at least one terminal range hood, and generate a second smoke exhaust control signal according to the start / stop status signals; determine a target smoke exhaust control signal according to the first smoke exhaust control signal and the second smoke exhaust control signal.

[0060] Further, both the first smoke exhaust control signal and the second smoke exhaust control signal correspond to air volume levels; the step of determining the target smoke exhaust control signal according to the first smoke exhaust control signal and the second smoke exhaust control signal includes: determining the signal with the larger air volume level among the first smoke exhaust control signal and the second smoke exhaust control signal as the target smoke exhaust control signal.

[0061] For the case where the smoke gradually increases, the specific process of generating the smoke exhaust control signal is as follows: Continuously obtain the current first smoke signal in real time, and determine whether the current first smoke signal is greater than the reference signal. If not, continue to execute the step of continuously obtaining the current first smoke signal in real time; if so, determine whether the current third difference between the current first smoke signal and the reference signal is greater than a first set threshold. If not, continue to execute the step of continuously obtaining the current first smoke signal in real time; if so, determine whether multiple consecutive first smoke signals within the specified time are all greater than the reference signal; if not, continue to execute the step of continuously obtaining the current first smoke signal in real time; if so, determine the air volume level according to the current third difference, and generate the smoke exhaust control signal according to the air volume level.

[0062] For the case where the smoke gradually decreases, the specific process of generating the smoke exhaust control signal is as follows: Continuously obtain the current first smoke signal in real time, and determine whether the current first smoke signal is less than the reference signal. If not, continue to execute the step of generating the smoke exhaust control signal according to the air volume level; if so, determine whether the current fourth difference between the current first smoke signal and the reference signal is greater than a second set threshold. If not, continue to execute the step of continuously obtaining the current first smoke signal in real time; if so, determine whether multiple consecutive first smoke signals within the specified time are all less than the reference signal; if not, continue to execute the step of continuously obtaining the current first smoke signal in real time; if so, determine the smoke exhaust control signal as a stop smoke exhaust signal.

[0063] See Figure 4As shown, the real-time AD value of the automatic smoke sensor is officially read. The AD value read each time is judged against the reference value A. If it is greater than the reference value A, a certain difference value n1 greater than the reference value A is obtained. If it is greater than the reference value A continuously for a certain period of time t1, otherwise, re-judgment is carried out; when the difference value n1 obtained when continuously greater than the reference value A, the fan is started, and the corresponding air volume level is started according to a certain range ratio according to the difference value n1; after the fan is started, the AD value of the automatic smoke sensor is read in real time and then judged against the reference value A. If it is greater than the reference value A, it means the smoke is still there, and the corresponding air volume level is continuously started according to a certain range ratio; if it is less than the reference value A, a certain difference value n2 less than the reference value A is obtained. If it is less than the reference value A continuously for a certain period of time t2, it means the smoke has stopped exhausting and the air has improved, and the fan rotation can be stopped.

[0064] The following lists an example of realizing smoke exhaust based on the communication between the automatic smoke sensor and the damper body at the same time. The process of smoke exhaust by combining the two methods is as follows. See Figure 6 As shown:

[0065] S1, when the terminal range hood on each floor starts to exhaust smoke, the terminal range hood generates a certain power consumption current. Since the power supply of the range hood is obtained through the damper main unit, when the power consumption current of the range hood is greater than that of the damper body, the control current in the damper body will sense the start current of the range hood. As long as there is a certain amount of current value, the damper will recognize the start of the range hood.

[0066] S2, when the damper body recognizes the start of the terminal range hood, it will immediately open the valve of the damper, so that the oil fume can be quickly discharged into the common flue. At the same time, it will timely report the start or stop state signal of the range hood during smoke exhaust to the main unit through wireless communication, so that the main unit can exhaust smoke.

[0067] S3, when there is oil fume in the common flue, the automatic smoke sensor can sense the oil fume concentration in the common flue in real time. The automatic smoke sensor will automatically calculate the amount of oil fume or the oil fume concentration value through an algorithm, and transmit the smoke signal of the oil fume concentration value to the main control board of the host control system in real time.

[0068] S4, when the main control board of the host control system receives the size of the oil fume concentration value transmitted by the automatic smoke sensor, it will automatically adjust the size of the smoke exhaust air volume of the main unit, achieving the effect of self-adjusting the air volume, and at the same time minimizing the power consumption of the main unit and reducing the environmental noise.

[0069] S5, at the same time, the host wireless communication system is listening to the damper wireless communication system in real time. When the host wireless communication system receives the information that the range hood is opened or closed sent by the damper wireless communication system, it will immediately transmit it to the main control board of the host control system, and the main board will start or stop the smoke exhaust state of the host at the same time.

[0070] S6. When the host control system receives the wireless communication system signals indicating that the air valves on each floor are opened and at the same time receives the smoke concentration signals sensed by the motion smoke detectors, the host will, according to the current working conditions, select a larger air volume gear for smoke exhaust operation.

[0071] S7. When the host receives the signals indicating that the smoke concentration sensed by the motion smoke detectors is very low after running for a period of time and the smoke concentration continues to remain very low, the host control system will gradually reduce the rotational speed of the main fan until a default minimum value to maintain an appropriate smoke exhaust volume, achieving a good smoke exhaust volume while also having the beneficial effects of energy conservation and noise reduction.

[0072] S8. When the host is constantly monitoring the wireless communication signals in the wireless communication system and has not received the signal indicating that the valve is opened but has received the smoke concentration signals sensed by the motion smoke detectors, the host control system will also start the smoke exhaust of the smoke machine host to ensure smooth smoke exhaust in the flue and prevent the host from being unable to exhaust smoke due to the inability to receive the signals for opening the valve and the smoke machine, which may cause the oil fume in the common flue to flow back into the households on each floor.

[0073] S9. Similarly, when the host is constantly monitoring the wireless communication signals in the wireless communication system and has not received the wireless signal indicating that the valve is opened but has received the smoke concentration signals sensed by the motion smoke detectors, the host control system will also start the smoke exhaust of the smoke machine host to ensure smooth smoke exhaust in the flue and prevent the host from being unable to exhaust smoke due to the inability to receive the signals for opening the valve and the smoke machine, which may cause the oil fume in the common flue to flow back into the households on each floor. When the smoke concentration signal decreases, the rotational speed of the main fan will be automatically and gradually reduced, achieving the beneficial effects of energy conservation and noise reduction; when the oil fume in the common flue is completely exhausted and there is no smoke concentration signal at all, the smoke exhaust function of the host will be automatically turned off.

[0074] In the smoke exhaust control method of the central range hood provided by the embodiment of the present application, the central range hood senses the change amount of the smoke concentration through the motion smoke detectors assembled at the air inlet, and thus adjusts the air volume according to the self-sensed smoke concentration size, so as to achieve the purpose of adaptive smoke exhaust, achieving multiple effective signal collection and active acquisition. No matter which signal fails, it can ensure that as long as there is smoke, timely smoke exhaust can be achieved, preventing the oil fume in the user's home from flowing back and ensuring that the central range hood accurately and timely starts smoke exhaust.

[0075] On the one hand, when the smoke volume is large, even if the main unit does not receive the wireless power-on signal, it can effectively sense the change in the amount of oil fume and transmit it to the main control system of the main unit, so that it can quickly calculate the corresponding air volume according to the oil fume concentration for smoke exhaust. On the other hand, when no oil fume is detected or the amount of oil fume decreases, even if the main unit does not receive the wireless power-off signal, it can quickly stop the operation of the main unit or appropriately reduce the smoke exhaust air volume of the main unit to reduce power consumption and the noise of the main unit, achieving the purpose of energy conservation and noise reduction.

[0076] Based on the above method embodiments, an embodiment of the present application further provides a smoke exhaust control device for a central range hood. The device is applied to the main control system of the central range hood, and the main control system is respectively connected to an automatic smoke sensor, a plurality of terminal range hoods, and the main unit fan; the central range hood is arranged at the top of the common flue; the plurality of terminal range hoods are respectively communicated with the common flue; see Figure 7 As shown, the device includes:

[0077] A smoke signal receiving module 72, configured to receive a first smoke signal sent by the automatic smoke sensor after at least one terminal range hood is started; the first smoke signal is obtained by the automatic smoke sensor detecting the smoke in the common flue in real time; a control signal generating module 74, configured to generate a target smoke exhaust control signal according to the first smoke signal and a preset reference signal; a smoke exhaust control module 76, configured to control the operation of the main unit fan according to the target smoke exhaust control signal.

[0078] The above device further includes a reference signal determining module for: powering on and initializing the automatic smoke sensor, and determining the reference signal.

[0079] The above reference signal determining module is further configured to: obtain a first specified number of consecutive second smoke signals; the second smoke signal is a smoke signal collected by the automatic smoke sensor every first sampling time; calculate a first average value corresponding to the first specified number of second smoke signals; determine whether the first average value is within a first preset interval; if so, determine the first average value as the reference signal.

[0080] The above device further includes a calibration module for: obtaining a second specified number of consecutive third smoke signals; the third smoke signal is a smoke signal collected by the automatic smoke sensor every second sampling time, and the first difference from the reference signal is within a second preset interval; calculate a second average value corresponding to the second specified number of third smoke signals; determine whether the second difference between the second average value and the reference signal is within a third preset interval; if so, update the reference signal using the second average value.

[0081] The above control signal generating module is further configured to determine a plurality of consecutive first smoke signals within a specified time; generate a target smoke exhaust control signal according to the magnitude relationship and the difference magnitude between the plurality of consecutive first smoke signals and the reference signal.

[0082] The above control signal generation module is further configured to determine a plurality of consecutive first smoke signals within a specified time; generate a first smoke exhaust control signal according to the magnitude relationship and difference magnitude between the plurality of consecutive first smoke signals and a reference signal respectively; receive the start-stop status signals of at least one terminal range hood, and generate a second smoke exhaust control signal according to the start-stop status signals; and determine a target smoke exhaust control signal according to the first smoke exhaust control signal and the second smoke exhaust control signal.

[0083] Both the above first smoke exhaust control signal and the second smoke exhaust control signal correspond to a wind volume level; the control signal generation module is further configured to determine the signal with the larger wind volume level among the first smoke exhaust control signal and the second smoke exhaust control signal as the target smoke exhaust control signal.

[0084] The above control signal generation module is further configured to obtain the current first smoke signal in real time, and determine whether the current first smoke signal is greater than the reference signal. If not, continue to execute the step of obtaining the current first smoke signal in real time; if so, determine whether the current third difference between the current first smoke signal and the reference signal is greater than a first set threshold. If not, continue to execute the step of obtaining the current first smoke signal in real time; if so, determine whether the plurality of consecutive first smoke signals within the specified time are all greater than the reference signal; if not, continue to execute the step of obtaining the current first smoke signal in real time; if so, determine the wind volume level according to the current third difference, and generate a smoke exhaust control signal according to the wind volume level.

[0085] The above control signal generation module is further configured to obtain the current first smoke signal in real time, and determine whether the current first smoke signal is less than the reference signal. If not, continue to execute the step of generating a smoke exhaust control signal according to the wind volume level; if so, determine whether the current fourth difference between the current first smoke signal and the reference signal is greater than a second set threshold. If not, continue to execute the step of obtaining the current first smoke signal in real time; if so, determine whether the plurality of consecutive first smoke signals within the specified time are all less than the reference signal; if not, continue to execute the step of obtaining the current first smoke signal in real time; if so, determine the smoke exhaust control signal as a stop smoke exhaust signal.

[0086] The device provided in the embodiment of the present application has the same implementation principle and the same technical effects as those in the foregoing method embodiment. For the sake of brief description, for the parts not mentioned in the embodiment of the device, reference may be made to the corresponding content in the foregoing method embodiment.

[0087] The embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions cause the processor to implement the above method. For the specific implementation, reference may be made to the foregoing method embodiment, and details are not described herein again.

[0088] The computer program product of the method, apparatus, and electronic device provided by the embodiments of the present application includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method described in the foregoing method embodiments. For specific implementation, reference can be made to the method embodiments and will not be elaborated herein.

[0089] Unless otherwise specifically stated, the relative steps, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0090] If the described function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a non-volatile computer-readable storage medium executable by a processor. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program code.

[0091] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0092] Finally, it should be noted that the above-described embodiments are only specific implementation manners of the present application, used to illustrate the technical solutions of the present application, rather than limiting it. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the technical field familiar with the present application can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for controlling the smoke exhaust of a central range hood, characterized in that, The method is applied to the main control system of a central range hood. The central range hood includes a main control system and a main machine fan. The main control system is respectively connected to an automatic smoke sensor, multiple terminal range hoods, and the main machine fan. The central range hood is arranged at the top of a common flue. Multiple terminal range hoods are respectively communicated with the common flue. The method includes: After at least one of the terminal range hoods is started, receiving a first smoke signal sent by the automatic smoke sensor. The first smoke signal is obtained by the automatic smoke sensor through real-time detection of the smoke in the common flue. Determining multiple consecutive first smoke signals within a specified time. Generating a first smoke exhaust control signal according to the magnitude relationship and difference magnitude between the multiple consecutive first smoke signals and a reference signal. Receiving the start-stop state signals of at least one of the terminal range hoods, and generating a second smoke exhaust control signal according to the start-stop state signals. Both the first smoke exhaust control signal and the second smoke exhaust control signal correspond to air volume levels. Determining the signal with the larger air volume level among the first smoke exhaust control signal and the second smoke exhaust control signal as the target smoke exhaust control signal. Controlling the operation of the main machine fan according to the target smoke exhaust control signal.

2. The method according to claim 1, characterized in that, Before the step of receiving the first smoke signal sent by the automatic smoke sensor, it further includes: Powering on and initializing the automatic smoke sensor, and determining the reference signal.

3. The method according to claim 2, wherein The step of determining the reference signal includes: Obtaining a continuous first specified number of second smoke signals. The second smoke signal is a smoke signal collected by the automatic smoke sensor every first sampling time. Calculating a first average value corresponding to the first specified number of second smoke signals. Judging whether the first average value is within a first preset interval. If so, determining the first average value as the reference signal.

4. The method according to claim 2, wherein The method further includes: Obtaining a continuous second specified number of third smoke signals. The third smoke signal is a smoke signal collected by the automatic smoke sensor every second sampling time, and the first difference between the third smoke signal and the reference signal is within a second preset interval. Calculating a second average value corresponding to the second specified number of third smoke signals. Judging whether the second difference between the second average value and the reference signal is within a third preset interval. If so, updating the reference signal with the second average value.

5. The method according to claim 1, wherein Determining multiple consecutive first smoke signals within a specified time. Generating a smoke exhaust control signal according to the magnitude relationship and difference magnitude between the multiple consecutive first smoke signals and the reference signal. The step that the smoke exhaust control signal includes the target smoke exhaust control signal or the first smoke exhaust control signal includes: Real-time obtaining the current first smoke signal, judging whether the current first smoke signal is greater than the reference signal. If not, continuing to execute the step of real-time obtaining the current first smoke signal. If so, judging whether the current third difference between the current first smoke signal and the reference signal is greater than a first set threshold. If not, continuing to execute the step of real-time obtaining the current first smoke signal. If so, determine whether multiple consecutive first smoke signals within the specified time are all greater than the reference signal; if not, continue to execute the step of obtaining the current first smoke signal in real time; If so, determine the air volume level according to the current third difference, and generate a smoke exhaust control signal according to the air volume level.

6. The method according to claim 5, wherein Determine multiple consecutive first smoke signals within the specified time; The step of generating a smoke exhaust control signal according to the magnitude relationship and difference magnitude between multiple consecutive first smoke signals and the reference signal further includes: Obtain the current first smoke signal in real time, and determine whether the current first smoke signal is less than the reference signal. If not, continue to execute the step of generating a smoke exhaust control signal according to the air volume level; If so, determine whether the current fourth difference between the current first smoke signal and the reference signal is greater than a second set threshold. If not, continue to execute the step of obtaining the current first smoke signal in real time; If so, determine whether multiple consecutive first smoke signals within the specified time are all less than the reference signal; if not, continue to execute the step of obtaining the current first smoke signal in real time; If so, determine the smoke exhaust control signal as a stop smoke exhaust signal.

7. A smoke exhaust control device for a central range hood, characterized in that, The device is applied to the main control system of a central range hood. The central range hood includes a main control system and a main engine fan; the main control system is respectively connected to an automatic smoke sensing device, multiple terminal range hoods, and the main engine fan; the central range hood is arranged at the top of a common flue; Multiple terminal range hoods are respectively communicated with the common flue; the device includes: A smoke signal receiving module, configured to receive a first smoke signal sent by the automatic smoke sensing device after at least one of the terminal range hoods is started; the first smoke signal is obtained by the automatic smoke sensing device through real-time detection of the smoke in the common flue; A control signal generating module, configured to determine multiple consecutive first smoke signals within the specified time; generate a first smoke exhaust control signal according to the magnitude relationship and difference magnitude between multiple consecutive first smoke signals and a reference signal respectively; receive the start-stop state signals of at least one of the terminal range hoods, and generate a second smoke exhaust control signal according to the start-stop state signals; both the first smoke exhaust control signal and the second smoke exhaust control signal correspond to an air volume level; determine the signal with the larger air volume level among the first smoke exhaust control signal and the second smoke exhaust control signal as the target smoke exhaust control signal; A smoke exhaust control module, configured to control the operation of the main engine fan according to the target smoke exhaust control signal.

8. A smoke exhaust control system for a central range hood, characterized in that, The system includes: a central range hood, multiple terminal range hoods, and an automatic smoke sensing device; the central range hood is arranged at the top of a common flue; multiple terminal range hoods are communicated with the common flue; the central range hood includes: a main control system and a main engine fan; the main control system is respectively connected to the automatic smoke sensing device, multiple terminal range hoods, and the main engine fan; The main control system is configured to execute the method according to any one of claims 1-6.

9. The system according to claim 8, wherein The automatic smoke sensing device is disposed at one of the following positions: in the central range hood, at the ventilation opening of the central range hood and the common flue, or at a designated position in the common flue.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions which, when called and executed by a processor, cause the processor to implement the method according to any one of claims 1 to 6.

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