CN111878862B - Control method and system of smoke exhaust ventilator - Google Patents

Control method and system of smoke exhaust ventilator Download PDF

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Publication number
CN111878862B
CN111878862B CN202010589624.7A CN202010589624A CN111878862B CN 111878862 B CN111878862 B CN 111878862B CN 202010589624 A CN202010589624 A CN 202010589624A CN 111878862 B CN111878862 B CN 111878862B
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China
Prior art keywords
channel
temperature value
smoke exhaust
heat exchange
value
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CN202010589624.7A
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Chinese (zh)
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CN111878862A (en
Inventor
夏鹏
李旭
卢大海
何建奇
毛守博
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Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Priority to CN202010589624.7A priority Critical patent/CN111878862B/en
Publication of CN111878862A publication Critical patent/CN111878862A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2021—Arrangement or mounting of control or safety systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/81—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the air supply to heat-exchangers or bypass channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/40—Pressure, e.g. wind pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention belongs to the technical field of air treatment equipment, and particularly relates to a control method and a control system of a smoke exhaust ventilator. The invention aims to solve the problem that when the traditional smoke exhaust ventilator is used, in order to ensure that the air pressure inside and outside the room is kept balanced, the door or window is required to be opened, so that the outdoor cold air is directly introduced into the room, and the comfort level of a user is reduced. For this purpose, according to the control method and system of the range hood of the present invention, when the current indoor air pressure value is judged to be smaller than the initial indoor air pressure value, and when the outdoor temperature value is smaller than the minimum human body proper temperature value, the difference between the indoor temperature value and the outdoor temperature value is compared with the preset temperature difference threshold. Therefore, under the outdoor cold condition, the first heat exchange channel and the second heat exchange channel can be opened, so that the indoor and outdoor air pressure can be kept balanced when the range hood operates, the indoor heat loss can be reduced, and the use experience of a user can be improved.

Description

Control method and system of smoke exhaust ventilator
Technical Field
The invention belongs to the technical field of air treatment equipment, and particularly relates to a control method and a control system of a smoke exhaust ventilator.
Background
The range hood rapidly pumps the waste generated in the combustion of the cooking range and the oil smoke harmful to human bodies and the indoor air outdoors so as to ensure the indoor environmental quality. In the operation process of the range hood, since indoor air is pumped outdoors, a door or a window is generally required to be opened to keep the indoor and outdoor air pressure balanced. However, in the case where the outdoor ambient temperature is low, directly introducing outdoor air into the room reduces the indoor temperature, reducing user comfort.
Accordingly, there is a need in the art for a new range hood control method and system to address the above-mentioned problems.
Disclosure of Invention
In order to solve the problems in the prior art, namely to solve the problem that when the existing smoke exhaust ventilator is used, in order to ensure that the indoor and outdoor air pressures are kept balanced, the door or window needs to be opened, and the outdoor cold air is directly introduced into the room, so that the comfort level of a user is reduced, the invention provides a control method of the smoke exhaust ventilator, wherein a smoke exhaust channel, a fresh air channel, a first heat exchange channel and a second heat exchange channel are arranged in the smoke exhaust ventilator; the smoke exhaust channel is used for directly communicating a smoke exhaust port of the smoke exhaust ventilator body with the outside, the fresh air channel is used for directly communicating an indoor space where the smoke exhaust port of the smoke exhaust ventilator body is located with the outside, the first heat exchange channel is used for communicating the smoke exhaust port of the smoke exhaust ventilator body with the outside after passing through the heat exchanger, the second heat exchange channel is used for communicating the indoor space where the smoke exhaust port of the smoke exhaust ventilator body is located with the outside after passing through the heat exchanger, and the control method comprises the following steps: acquiring an initial indoor air pressure value before starting the range hood and a current indoor air pressure value after the range hood operates for a preset time; judging whether the current indoor air pressure value is smaller than the initial indoor air pressure value or not; when the current indoor air pressure value is smaller than the initial indoor air pressure value, acquiring an indoor temperature value and an outdoor temperature value; judging whether the outdoor temperature value is smaller than a preset minimum human body proper temperature value or not; when the outdoor temperature value is smaller than the minimum human body proper temperature value, comparing the difference value between the indoor temperature value and the outdoor temperature value with a preset temperature difference threshold value; and controlling the opening and closing of the smoke discharging channel, the fresh air channel, the first heat exchange channel and the second heat exchange channel according to the comparison result.
As a preferred technical solution of the above control method provided by the present invention, the step of controlling the opening and closing of the smoke exhaust channel, the fresh air channel, the first heat exchange channel and the second heat exchange channel according to the comparison result includes: when the difference value between the indoor temperature value and the outdoor temperature value is smaller than the temperature difference threshold value, the smoke discharging channel and the fresh air channel are kept open, and the first heat exchange channel and the second heat exchange channel are kept closed; and when the difference value between the indoor temperature value and the outdoor temperature value is larger than the temperature difference threshold value, keeping the smoke discharging channel and the fresh air channel closed, and keeping the first heat exchange channel and the second heat exchange channel open.
As a preferable technical scheme of the control method provided by the invention, after the step of judging whether the outdoor temperature value is smaller than the preset minimum suitable temperature value of the human body, the method further comprises: when the outdoor temperature value is greater than or equal to a preset minimum human body proper temperature value, the smoke discharging channel and the fresh air channel are kept open, and the first heat exchanging channel and the second heat exchanging channel are kept closed.
As a preferable technical solution of the above control method provided by the present invention, after the step of "determining whether the current indoor air pressure value is smaller than the initial indoor air pressure value", the method further includes: and when the current indoor air pressure value is equal to the initial indoor air pressure value, keeping the smoke exhaust channel open, and keeping the fresh air channel, the first heat exchange channel and the second heat exchange channel closed.
As a preferable technical scheme of the control method provided by the invention, after the step of acquiring the indoor temperature value and the outdoor temperature value, the method further comprises the following steps: respectively judging whether the outdoor temperature value and the indoor temperature value are larger than a preset maximum suitable human body temperature value or not; when the outdoor temperature value is larger than the highest human body proper temperature value and the indoor temperature value is smaller than the highest human body proper temperature value, the smoke exhaust channel and the fresh air channel are kept closed, and the first heat exchange channel and the second heat exchange channel are kept open.
In addition, the invention also provides a control system of the smoke exhaust ventilator, wherein the smoke exhaust ventilator is provided with a smoke exhaust channel, a fresh air channel, a first heat exchange channel and a second heat exchange channel; the smoke exhaust channel is used for directly communicating a smoke exhaust port of the smoke exhaust ventilator body with the outside, the fresh air channel is used for directly communicating an indoor space where the smoke exhaust port of the smoke exhaust ventilator body is located with the outside, the first heat exchange channel is used for communicating the smoke exhaust port of the smoke exhaust ventilator body with the outside after passing through the heat exchanger, the second heat exchange channel is used for communicating the indoor space where the smoke exhaust port of the smoke exhaust ventilator body is located with the outside after passing through the heat exchanger, and the control system comprises an acquisition module, a judging module, a comparing module and a control module; the acquisition module is used for acquiring an initial indoor air pressure value before the smoke exhaust ventilator is started and a current indoor air pressure value after the smoke exhaust ventilator runs for a preset time; the judging module is used for judging whether the current indoor air pressure value is smaller than the initial indoor air pressure value or not; when the current indoor air pressure value is smaller than the initial indoor air pressure value, the acquisition module is further used for acquiring an indoor temperature value and an outdoor temperature value; the judging module is also used for judging whether the outdoor temperature value is smaller than a preset minimum human body proper temperature value or not; when the outdoor temperature value is smaller than the minimum human body proper temperature value, the comparison module is further used for comparing the difference value between the indoor temperature value and the outdoor temperature value with a preset temperature difference threshold value; the control module is used for controlling the opening and closing of the smoke discharging channel, the fresh air channel, the first heat exchange channel and the second heat exchange channel according to the comparison result.
As a preferable technical solution of the above control system provided by the present invention, the "the control module is configured to control opening and closing of the smoke exhaust channel, the fresh air channel, the first heat exchange channel, and the second heat exchange channel according to a comparison result" includes: when the difference value between the indoor temperature value and the outdoor temperature value is smaller than the temperature difference threshold value, the control module is used for keeping the smoke discharging channel and the fresh air channel open and keeping the first heat exchanging channel and the second heat exchanging channel closed; when the difference value between the indoor temperature value and the outdoor temperature value is larger than the temperature difference threshold value, the control module is used for keeping the smoke exhaust channel and the fresh air channel closed and keeping the first heat exchange channel and the second heat exchange channel open.
As a preferable technical scheme of the control system provided by the invention, after the judging module is further used for judging whether the outdoor temperature value is smaller than a preset minimum human body proper temperature value, when the outdoor temperature value is larger than or equal to the preset minimum human body proper temperature value, the control module is further used for keeping the smoke exhaust channel and the fresh air channel open and keeping the first heat exchange channel and the second heat exchange channel closed.
As a preferable technical scheme of the control system provided by the invention, after the judging module is used for judging whether the current indoor air pressure value is smaller than the initial indoor air pressure value, when the current indoor air pressure value is equal to the initial indoor air pressure value, the control module is also used for keeping the smoke exhaust channel open and keeping the fresh air channel, the first heat exchange channel and the second heat exchange channel closed.
As a preferable technical scheme of the control system provided by the invention, after the acquiring module is further used for acquiring an indoor temperature value and an outdoor temperature value, the judging module is further used for respectively judging whether the outdoor temperature value and the indoor temperature value are larger than a preset maximum suitable temperature value of a human body; when the outdoor temperature value is larger than the highest human body proper temperature value and the indoor temperature value is smaller than the highest human body proper temperature value, the control module is further used for keeping the smoke exhaust channel and the fresh air channel closed and keeping the first heat exchange channel and the second heat exchange channel open.
According to the control method and the control system of the smoke exhaust ventilator, when the current indoor air pressure value is judged to be smaller than the initial indoor air pressure value, and when the outdoor temperature value is smaller than the lowest proper temperature value of a human body, the difference value between the indoor temperature value and the outdoor temperature value is compared with the preset temperature difference threshold value, and the opening and closing of the smoke exhaust channel, the fresh air channel, the first heat exchange channel and the second heat exchange channel are controlled according to the comparison result. Therefore, under the outdoor cold condition, the first heat exchange channel and the second heat exchange channel can be opened, so that the indoor and outdoor air pressure can be kept balanced when the range hood operates, the indoor heat loss can be reduced, and the use experience of a user can be improved.
In addition, according to the control method and the control system of the smoke exhaust ventilator, when the outdoor temperature value is greater than or equal to the preset minimum proper human temperature value, the smoke exhaust channel and the fresh air channel are kept open, and the first heat exchange channel and the second heat exchange channel are kept closed. Therefore, only outdoor natural wind directly enters the room, so that the indoor and outdoor pressure balance can be ensured, and meanwhile, the indoor air is updated, so that the use experience of a user is improved.
Drawings
The control method and system of the range hood of the present invention will be described with reference to the accompanying drawings.
In the accompanying drawings:
fig. 1 is a schematic structural view of the range hood of the present embodiment in a state where only the smoke exhaust passage is opened;
fig. 2 is a schematic structural diagram of the range hood in the embodiment in a state where the smoke exhaust channel and the fresh air channel are simultaneously opened;
fig. 3 is a schematic structural diagram of the range hood in the present embodiment in a state where the first heat exchange channel and the second heat exchange channel are simultaneously opened;
fig. 4 is a schematic view of the first and second channels of the heat exchanger in the range hood of the present embodiment;
fig. 5 is a flow chart of a control method of the range hood according to the embodiment.
List of reference numerals
1-a smoke exhaust ventilator body; 11-a power switch;
2-heat exchanger; 21-a first channel; 22-a second channel; 23-heat exchange core;
31-a smoke exhaust channel; 32-a fresh air channel;
41-a first heat exchange channel; 42-a second heat exchange channel;
51-an air pressure sensor; 52-a first temperature sensor; 53-a second temperature sensor;
61-a first electrically operated valve; 62-a second electrically operated valve; 63-a fifth valve;
71-a first filtration device; 72-a second filtration device;
8-a fan.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. For example, although the initial indoor air pressure value before the smoke ventilator is started and the current indoor air pressure value after the smoke ventilator is operated for a preset time are obtained in the control method of the smoke ventilator in the drawing, the indoor temperature value and the outdoor temperature value are obtained at different time, and the sequence is not uniform, and one skilled in the art can adjust the sequence as required under the condition of not deviating from the principle of the invention so as to adapt to specific application occasions. For example, the two steps may also be performed simultaneously.
It should be noted that in the description of the present invention, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as limiting the present invention. Furthermore, in the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the existing range hood directly introduces outdoor cold air into the room due to the need of opening a door or a window to maintain the air pressure inside and outside the room in order to maintain the air pressure balance during use, and reduce the comfort of users, the present embodiment provides a range hood, as shown in fig. 1 to 4, which includes a range hood body 1, a heat exchanger 2, a smoke exhaust channel 31 (see fig. 1 and 2) for communicating the smoke exhaust port of the range hood with the outside, and a fresh air channel 32 (see fig. 2) for communicating the room where the smoke exhaust port of the range hood body 1 is located with the outside; the heat exchanger 2 comprises a first channel 21 and a second channel 22 capable of selectively exchanging heat with each other, please refer to three main operation modes of the range hood described below; the air inlet of the first channel 21 is connected to one end of the smoke exhaust channel 31 close to the smoke exhaust ventilator body 1, and the air outlet of the first channel 21 is connected to one end of the smoke exhaust channel 31 close to the outside (see fig. 4); the air inlet of the second channel 22 is connected with one end, close to the outside, of the fresh air channel 32, and the air outlet of the second channel 22 is connected with one end, close to the inside, of the fresh air channel 32 (see fig. 4); the range hood further includes an air pressure sensor 51 disposed in the chamber.
For example, the present heat exchanger 2 is only applied to the total heat fresh air fan 8 or the fresh air conditioner, and the heat exchange cores 23 are disposed in the general heat exchanger 2, and the first channels 21 and the second channels 22 are disposed to exchange heat through the interiors of the heat exchange cores 23. Common heat exchangers 2 include rotary-type total heat exchangers 2 and plate-fin total heat exchangers 2.
The air pressure sensor 51 may be disposed on the outer wall of the smoke exhaust channel 31 or the fresh air channel 32 located on the indoor side, so that the air pressure sensor 51 and the smoke exhaust channel 31 or the fresh air channel 32 form an integral body, and the integral body of the smoke exhaust ventilator is concise, which is beneficial to simplifying the installation of the smoke exhaust ventilator. In addition, the air pressure sensor 51 is preferably disposed at a position distant from the smoke suction port of the hood and the air outlet of the fresh air duct 32 to reliably monitor the indoor air pressure.
It should be noted that, the range hood of this embodiment mainly has the following three working modes:
(1) In the state shown in fig. 1, only the smoke exhaust channel 31 is opened, and the application scenario of the working mode is as follows: the door or window of the kitchen is opened, so that the indoor air pressure and the outdoor air pressure are balanced, and the indoor air temperature and the outdoor air temperature are not greatly different;
(2) In the state shown in fig. 2, the smoke exhaust channel 31 and the fresh air channel 32 are simultaneously opened, and the application scene of the working mode is as follows: when the door and window of the kitchen are closed, the air pressure of the indoor and the outdoor can be kept balanced by opening the fresh air channel 32, and the air temperature of the indoor and the outdoor is not greatly different;
(3) In the state shown in fig. 3, the first heat exchange channel 41 and the second heat exchange channel 42 are opened simultaneously, and the application scenario of the working mode is as follows: when the door and window of the kitchen are closed, the outdoor temperature is not in the proper temperature range of the human body, and the indoor temperature is in the proper temperature range of the human body, for example, the outdoor temperature is severe cold in winter, and the indoor is relatively warm due to heating equipment or heat generated by cooking, at this time, the heat recovery can be carried out through the heat exchanger 2, so that the indoor heat loss is reduced.
It will be appreciated that as can be seen from the figures, the first heat exchange channel 41 is formed by a portion of the first channel 21 and the flue gas channel 31 of the heat exchanger 2, and the second heat exchange channel 42 is formed by a portion of the second channel 22 and the fresh air channel 32 of the heat exchanger 2.
In the range hood provided in this embodiment, under the outdoor cold condition, when the air pressure sensor 51 of the range hood detects that the initial indoor air pressure value before the range hood is started is smaller than the current indoor air pressure value after the range hood operates for a preset time, the smoke discharged from the smoke outlet of the range hood can be discharged to the outdoor through the first channel 21 of the heat exchanger 2 (can also be completely expressed as passing through the first heat exchange channel 41), and meanwhile, the outdoor air can enter the indoor through the second channel 22 of the heat exchanger 2 (can also be completely expressed as passing through the second heat exchange channel 42), so that the indoor and outdoor air pressure can be kept balanced when the range hood operates, the indoor heat loss can be reduced, and the use experience of a user can be improved.
As a preferred implementation manner of the above range hood provided in this embodiment, a first valve (not shown in the figure) is disposed on the first channel 21, and a second valve (not shown in the figure) is disposed on the smoke exhaust channel 31 between the air inlet and the air outlet of the first channel 21; or the range hood comprises a first electric valve 61, the first electric valve 61 comprises a first rotating shaft, a first wind shield and a first stepping motor, the first wind shield is connected with the air inlet of the first channel 21 through the first rotating shaft, and the first wind shield is arranged to selectively seal the smoke exhaust channel 31 or the first channel 21 when the first wind shield rotates around the first rotating shaft under the driving of the first stepping motor. For example, fig. 1 and 2 show a case where the smoke discharge passage 31 is opened and the first passage 21 is closed, and fig. 3 and 4 show a case where the smoke discharge passage 31 is closed and the first passage 21 is opened.
It will be appreciated that when the first valve is closed and the second valve is open, the smoke evacuation channel 31 may be opened; opening the first heat exchanging channel 41 may be achieved when the first valve is opened and the second valve is closed.
As a preferred implementation manner of the above range hood provided in this embodiment, a third valve (not shown in the figure) is disposed on the second channel 22, and a fourth valve (not shown in the figure) is disposed between the air inlet and the air outlet of the second channel 22 on the fresh air channel 32; or the range hood comprises a second electric valve 62, the second electric valve 62 comprises a second rotating shaft, a second wind shield and a second stepping motor, the second wind shield is connected to the air outlet of the second channel 22 through the second rotating shaft, and the second wind shield is arranged to selectively seal the fresh air channel 32 or the second channel 22 when the second wind shield rotates around the second rotating shaft under the driving of the second stepping motor. For example, fig. 2 shows a case where the fresh air passage 32 is opened and the second passage 22 is closed, and fig. 3 and 4 show a case where the fresh air passage 32 is closed and the second passage 22 is opened.
It will be appreciated that when the third valve is closed and the fourth valve is open, the fresh air channel 32 can be opened; opening the second passage 22 may be achieved when the third valve is open and the fourth valve is closed.
As a preferred embodiment of the above range hood provided in this embodiment, the fresh air channel 32 is provided with a fifth valve 63 at one end near the outside or the inside. Wherein the fifth valve 63 serves to control whether outdoor wind enters the room through the fresh air passage 32 or the second heat exchange passage 42.
Illustratively, the first, second, third, fourth and fifth valves 63 may be selected as solenoid valves or electrically operated valves for automatic control of the range hood.
In the range hood provided in this embodiment, the first electric valve 61 is disposed at the air inlet of the first channel 21, so that the purpose that the wind shield selectively opens or closes the smoke exhaust channel 31 or the first channel 21 can be achieved by controlling the first stepping motor to drive the first rotating shaft to rotate, and the required occupied internal space of the range hood is small, and the range hood has the advantages of convenience and low cost. For the advantages of the second electrically operated valve 62, please refer to the first electrically operated valve 61, and the description thereof is omitted. In this way, only the first electric valve 61 and the second electric valve 62 are needed to realize the switching between the smoke exhaust channel 31 and the first heat exchange channel 41, and the switching between the fresh air channel 32 and the second heat exchange channel 42, which has great advantages in terms of switching efficiency and manufacturing cost.
As a preferred implementation of the above range hood provided in this embodiment, the range hood further includes at least one of a first temperature sensor 52 and a second temperature sensor 53; the first temperature sensor 52 is used for monitoring the outdoor temperature and the second temperature sensor 53 is used for monitoring the indoor temperature.
Illustratively, a first temperature sensor 52 may be disposed at an end of the fresh air channel 32 near the outside to enable monitoring of the outside temperature while facilitating integrated placement of the range hood. However, it will be appreciated that the first sensor may also be located directly outside to monitor the temperature outside.
The second temperature sensor 53 may be disposed on the outer wall of the smoke exhaust channel 31 or the fresh air channel 32 located on the indoor side, so as to monitor the indoor temperature, and also to make the range hood realize an integrated design. However, it is understood that the second temperature sensor 53 may be provided at a wall or the like in the room.
In this way, when the range hood is automatically controlled, it can be determined whether the heat exchanger 2 needs to be used for heat exchange according to the comparison between the outdoor temperature monitored by the first temperature sensor 52 and the indoor temperature monitored by the second temperature sensor 53, that is, whether the first heat exchange channel 41 and the second heat exchange channel 42 need to be switched to be opened, so as to reduce the indoor heat loss.
As a preferred embodiment of the above range hood provided in this embodiment, the range hood body 1 is provided with a power switch 11 capable of controlling the simultaneous on or off of itself, the air pressure sensor 51, the first temperature sensor 52 and the second temperature sensor 53. It will be appreciated that when the power switch 11 is turned on, the hood body 1 starts to operate, and the air pressure sensor 51, the first temperature sensor 52 and the second temperature sensor 53 also activate respective monitoring functions.
As a preferred embodiment of the above range hood provided in this embodiment, since the smoke absorbed by the range hood has impurities such as oil, in order to prevent the impurities from entering the first channel 21 and causing the first channel 21 to be blocked, a first filtering device 71 may be disposed in the first channel 21 near the air inlet thereof.
Similarly, in order to prevent impurities such as dust in the outdoor air from entering the fresh air channel 32 and contaminating or blocking the fresh air channel 32 or the second channel 22 of the heat exchanger 2, even directly bringing the impurities into the room to affect the indoor cleaning, a second filter device 72 may be further disposed at one end of the fresh air channel 32 near the outdoor.
It will be appreciated that under the condition of tight closing of the door and window, the indoor air is discharged to the outside by the range hood, the indoor air pressure can be reduced, and when the fresh air channel 32 or the second heat exchange channel 42 is opened, the outdoor air can flow into the room through the fresh air channel 32 or the second heat exchange channel 42 under the action of the indoor and outdoor air pressure difference, but if the indoor and outdoor air flow is driven by the range hood body, the load of the range hood is too large, and the working effect of the range hood is affected. In order to ensure the working effect of the smoke exhaust ventilator and the normal exchange of indoor and outdoor air, a fan 8 can be further arranged at one end of the fresh air channel 32, which is close to the indoor space.
In addition, a fan 8 may be disposed at the air inlet of the second channel 22, so as to introduce outdoor air into the room through the second heat exchange channel 42.
Of course, the alternative embodiments described above, as well as the alternative and preferred embodiments, may also be used in a cross-fit manner, thereby combining new embodiments to suit more specific application scenarios.
In addition, in order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the outdoor cold air is directly introduced into the room due to the need of opening the door or window in order to ensure the balance of the indoor and outdoor air pressures when the existing range hood is used, the present embodiment further provides a control method of the range hood, as shown in fig. 1 to 4, in which a smoke exhaust channel 31, a fresh air channel 32, a first heat exchange channel 41 and a second heat exchange channel 42 are provided; the smoke exhaust channel 31 is used for directly communicating the smoke exhaust port of the smoke exhaust ventilator body 1 with the outside, the fresh air channel 32 is used for directly communicating the room where the smoke exhaust port of the smoke exhaust ventilator body 1 is located with the outside, the first heat exchange channel 41 is used for communicating the smoke exhaust port of the smoke exhaust ventilator body 1 with the outside after passing through the heat exchanger 2, the second heat exchange channel 42 is used for communicating the room where the smoke exhaust port of the smoke exhaust ventilator body 1 is located with the outside after passing through the heat exchanger 2, as shown in fig. 5, the control method comprises the following steps:
S1, acquiring an initial indoor air pressure value before starting up the smoke exhaust ventilator and a current indoor air pressure value after the smoke exhaust ventilator operates for a preset time;
illustratively, the initial indoor air pressure value may be acquired by the air pressure sensor 51 in the above-described embodiments of the range hood within the first 1 second or very short time of the start of the range hood body 11; the preset time may be set to any one of 20 seconds to 60 seconds to be sufficient to cause a significant change in the air pressure in the room in the case where the door or window is closed.
S2, judging whether the current indoor air pressure value is smaller than the initial indoor air pressure value or not;
it will be appreciated that step S2 is to automatically determine whether the kitchen is capable of ventilation through doors, windows, etc. of the outdoor air.
S3, when the current indoor air pressure value is smaller than the initial indoor air pressure value, acquiring an indoor temperature value and an outdoor temperature value;
it will be appreciated that when the current indoor air pressure value is less than the initial indoor air pressure value, it is described that outdoor air needs to be sent into the room through the fresh air channel 32 or the second heat exchange channel 42, but the specific selection of opening the fresh air channel 32 or the second heat exchange channel 42 needs to be judged according to the specific conditions of the indoor temperature and the outdoor temperature.
S4, judging whether the outdoor temperature value is smaller than a preset minimum human body proper temperature value or not;
S5, when the outdoor temperature value is smaller than the minimum proper human temperature value, comparing the difference value between the indoor temperature value and the outdoor temperature value with a preset temperature difference threshold value;
illustratively, the minimum human body temperature value may be set to 17 degrees celsius, indicating that the outdoor environment is severe cold when the outdoor temperature is significantly lower than this value; the preset temperature difference threshold may be set to any value of 1 to 5 degrees celsius, and the indoor temperature is generally higher than the outdoor temperature, and by comparing the difference between the indoor temperature value and the outdoor temperature value with the preset temperature difference threshold, it is known whether the heat in the room needs to be recovered, that is, whether the heat exchanger 2 needs to be turned on, and the first heat exchanging channel 41 and the second heat exchanging channel 42 are opened.
And S6, controlling the opening and closing of the smoke discharging channel 31, the fresh air channel 32, the first heat exchanging channel 41 and the second heat exchanging channel 42 according to the comparison result.
It should be noted that, although the detailed steps of the method of the present invention are described above in detail, those skilled in the art may combine, split and exchange the sequence of the steps without departing from the basic principle of the present invention, and the technical solution modified in this way does not change the basic concept of the present invention, and therefore falls within the scope of protection of the present invention. For example, the step S1 of obtaining the initial indoor air pressure value before the range hood is started and the current indoor air pressure value after the range hood is operated for a preset time, and the step S3 of obtaining the indoor temperature value and the outdoor temperature value may also be performed simultaneously.
According to the control method of the range hood of the present embodiment, when the current indoor air pressure value is determined to be smaller than the initial indoor air pressure value, and when the outdoor temperature value is smaller than the minimum suitable temperature value for human body, the difference between the indoor temperature value and the outdoor temperature value is compared with the preset temperature difference threshold, and the opening and closing of the smoke exhaust channel 31, the fresh air channel 32, the first heat exchange channel 41 and the second heat exchange channel 42 are controlled according to the comparison result. Thus, under the outdoor cold condition, the first heat exchange channel 41 and the second heat exchange channel 42 can be opened, so that when the range hood operates, the indoor and outdoor air pressures can be kept balanced, the indoor heat loss can be reduced, and the use experience of a user can be improved.
As a preferred implementation of the above control method provided in this embodiment, in step S6, the step of "controlling the opening and closing of the smoke exhaust channel 31, the fresh air channel 32, the first heat exchange channel 41 and the second heat exchange channel 42 according to the comparison result" includes: when the difference between the indoor temperature value and the outdoor temperature value is smaller than the temperature difference threshold value, the smoke discharging channel 31 and the fresh air channel 32 are kept open, and the first heat exchanging channel 41 and the second heat exchanging channel 42 are kept closed; when the difference between the indoor temperature value and the outdoor temperature value is greater than the temperature difference threshold, the smoke exhaust channel 31 and the fresh air channel 32 are kept closed, and the first heat exchange channel 41 and the second heat exchange channel 42 are kept open.
It will be appreciated that when the difference between the indoor temperature value and the outdoor temperature value is greater than the temperature difference threshold, it is indicated that the indoor temperature is much higher than the outdoor temperature, and in the case of severe cold outdoor air, the first heat exchange channel 41 and the second heat exchange channel 42 are kept open by opening the heat exchanger 2, so that the outdoor air can recover heat in the flue gas when entering the room, and the heat loss in the room is reduced, so as to improve the use experience of the user.
As a preferred implementation manner of the control method provided in this embodiment, after the step of determining whether the outdoor temperature value is less than the preset minimum human body suitable temperature value in step S4", the method further includes: when the outdoor temperature value is greater than or equal to the preset minimum human body suitable temperature value, the smoke exhaust channel 31 and the fresh air channel 32 are kept open, and the first heat exchange channel 41 and the second heat exchange channel 42 are kept closed. Therefore, only outdoor natural wind directly enters the room, so that the indoor and outdoor pressure balance can be ensured, and meanwhile, the indoor air is updated, so that the use experience of a user is improved.
As a preferred implementation manner of the control method provided in the present embodiment, after the step of determining whether the current indoor air pressure value is smaller than the initial indoor air pressure value in step S2", the method further includes: when the current indoor air pressure value is equal to the initial indoor air pressure value, the smoke exhaust channel 31 is kept open, and the fresh air channel 32, the first heat exchange channel 41 and the second heat exchange channel 42 are kept closed.
It will be appreciated that in this case the kitchen is directly vented to the outside through a window or door or the like without the need to introduce fresh air through the fresh air channel 32 or the second heat exchange channel 42.
As a preferred implementation manner of the control method provided in the present embodiment, after the step of obtaining the indoor temperature value and the outdoor temperature value in step S3", the method further includes: respectively judging whether the outdoor temperature value and the indoor temperature value are larger than a preset maximum human body proper temperature value or not; when the outdoor temperature value is greater than the maximum human body suitable temperature value and the indoor temperature value is less than the maximum human body suitable temperature value, the smoke discharging passage 31 and the fresh air passage 32 are kept closed, and the first heat exchanging passage 41 and the second heat exchanging passage 42 are kept open.
It can be understood that the maximum suitable human body temperature value can be set to 25 ℃, when the outdoor temperature is higher, if the air conditioner in the kitchen is used for refrigerating, the indoor temperature is lower than the outdoor temperature, and the indoor temperature is in the suitable human body temperature value range; at this time, by starting the heat exchanger 2 and keeping the first heat exchange channel 41 and the second heat exchange channel 42 open, the cold energy in the flue gas can be recovered, so that the problems of poor refrigerating effect and electric energy waste of the air conditioner are avoided.
It will be appreciated by those skilled in the art that the control method of the range hood provided in the present embodiment may be stored as a program in a computer readable storage medium. The storage medium includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform some steps of the methods of the various embodiments of the invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In addition, the present embodiment also provides a control system of a range hood, and the control system of the range hood is a product corresponding to the control method, and only a simple description is provided herein, and for the relevant content, please refer to the description of the control method, as shown in fig. 1 to 4, the range hood is provided with a smoke exhaust channel 31, a fresh air channel 32, a first heat exchange channel 41 and a second heat exchange channel 42; the smoke exhaust channel 31 is used for directly communicating a smoke exhaust port of the smoke exhaust ventilator body 1 with the outside, the fresh air channel 32 is used for directly communicating an indoor space where the smoke exhaust port of the smoke exhaust ventilator body 1 is positioned with the outside, the first heat exchange channel 41 is used for communicating the smoke exhaust port of the smoke exhaust ventilator body 1 with the outside after passing through the heat exchanger 2, the second heat exchange channel 42 is used for communicating the indoor space where the smoke exhaust port of the smoke exhaust ventilator body 1 is positioned with the outside after passing through the heat exchanger 2, and the control system comprises an acquisition module, a judging module, a comparing module and a control module; the acquisition module is used for acquiring an initial indoor air pressure value before the smoke exhaust ventilator is started and a current indoor air pressure value after the smoke exhaust ventilator runs for a preset time; the judging module is used for judging whether the current indoor air pressure value is smaller than the initial indoor air pressure value or not; when the current indoor air pressure value is smaller than the initial indoor air pressure value, the acquisition module is also used for acquiring an indoor temperature value and an outdoor temperature value; the judging module is also used for judging whether the outdoor temperature value is smaller than a preset minimum human body proper temperature value or not; when the outdoor temperature value is smaller than the minimum human body proper temperature value, the comparison module is also used for comparing the difference value between the indoor temperature value and the outdoor temperature value with a preset temperature difference threshold value; the control module is used for controlling the opening and closing of the smoke discharging channel 31, the fresh air channel 32, the first heat exchanging channel 41 and the second heat exchanging channel 42 according to the comparison result.
As a preferred implementation of the control system provided in this embodiment, the "control module for controlling opening and closing of the smoke exhaust channel 31, the fresh air channel 32, the first heat exchange channel 41 and the second heat exchange channel 42 according to the comparison result" includes: when the difference between the indoor temperature value and the outdoor temperature value is smaller than the temperature difference threshold, the control module is used for keeping the smoke discharging channel 31 and the fresh air channel 32 open and keeping the first heat exchanging channel 41 and the second heat exchanging channel 42 closed; when the difference between the indoor temperature value and the outdoor temperature value is greater than the temperature difference threshold, the control module is configured to keep the smoke exhaust channel 31 and the fresh air channel 32 closed, and keep the first heat exchange channel 41 and the second heat exchange channel 42 open.
As a preferred implementation manner of the above-mentioned control system provided in this embodiment, after the "determining module is further configured to determine whether the outdoor temperature value is less than the preset minimum human body suitable temperature value", when the outdoor temperature value is greater than or equal to the preset minimum human body suitable temperature value, the control module is further configured to keep the smoke exhaust channel 31 and the fresh air channel 32 open, and keep the first heat exchange channel 41 and the second heat exchange channel 42 closed.
As a preferred implementation manner of the control system provided in this embodiment, after the "determining module is configured to determine whether the current indoor air pressure value is less than the initial indoor air pressure value", when the current indoor air pressure value is equal to the initial indoor air pressure value, the control module is further configured to keep the smoke exhaust channel 31 open, and keep the fresh air channel 32, the first heat exchange channel 41 and the second heat exchange channel 42 closed.
As a preferred implementation manner of the control system provided in this embodiment, after the acquiring module is further configured to acquire an indoor temperature value and an outdoor temperature value, the judging module is further configured to respectively judge whether the outdoor temperature value and the indoor temperature value are greater than a preset maximum suitable temperature value of a human body; when the outdoor temperature value is greater than the maximum human body suitable temperature value and the indoor temperature value is less than the maximum human body suitable temperature value, the control module is further configured to keep the smoke exhaust channel 31 and the fresh air channel 32 closed, and keep the first heat exchange channel 41 and the second heat exchange channel 42 open.
It should be noted that, in the control system of the range hood provided in the foregoing embodiment, only the division of the foregoing functional modules (such as the acquisition module, the judgment module, the comparison module, and the control module) is illustrated, in practical application, the foregoing functional modules may be implemented by different functional modules, that is, the functional modules in the foregoing embodiment of the present invention are further decomposed or combined, for example, the functional modules in the foregoing embodiment may be combined into one functional module, or may be further split into a plurality of sub-modules, so as to implement all or part of the functions described above. The names of the functional modules in the embodiments of the present invention are merely for distinguishing, and are not considered as undue limitations of the present invention.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims of the present invention, any of the claimed embodiments may be used in any combination.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.

Claims (6)

1. A control method of a smoke exhaust ventilator is characterized in that a smoke exhaust channel, a fresh air channel, a first heat exchange channel and a second heat exchange channel are arranged in the smoke exhaust ventilator; the smoke exhaust channel is used for directly communicating a smoke exhaust port of the smoke exhaust ventilator body with the outside, the fresh air channel is used for directly communicating an indoor space where the smoke exhaust port of the smoke exhaust ventilator body is located with the outside, the first heat exchange channel is used for communicating the smoke exhaust port of the smoke exhaust ventilator body with the outside after passing through the heat exchanger, the second heat exchange channel is used for communicating the indoor space where the smoke exhaust port of the smoke exhaust ventilator body is located with the outside after passing through the heat exchanger, and the control method comprises the following steps:
Acquiring an initial indoor air pressure value before starting the range hood and a current indoor air pressure value after the range hood operates for a preset time;
judging whether the current indoor air pressure value is smaller than the initial indoor air pressure value or not;
when the current indoor air pressure value is smaller than the initial indoor air pressure value, acquiring an indoor temperature value and an outdoor temperature value;
judging whether the outdoor temperature value is smaller than a preset minimum human body proper temperature value or not;
when the outdoor temperature value is smaller than the minimum human body proper temperature value, comparing the difference value between the indoor temperature value and the outdoor temperature value with a preset temperature difference threshold value;
controlling the opening and closing of the smoke discharging channel, the fresh air channel, the first heat exchanging channel and the second heat exchanging channel according to the comparison result;
the step of acquiring the indoor temperature value and the outdoor temperature value further comprises the following steps:
respectively judging whether the outdoor temperature value and the indoor temperature value are larger than a preset maximum suitable human body temperature value or not;
when the outdoor temperature value is larger than the highest human body proper temperature value and the indoor temperature value is smaller than the highest human body proper temperature value, the smoke exhaust channel and the fresh air channel are kept closed, and the first heat exchange channel and the second heat exchange channel are kept open;
The step of controlling the opening and closing of the smoke exhaust channel, the fresh air channel, the first heat exchange channel and the second heat exchange channel according to the comparison result comprises the following steps:
when the difference value between the indoor temperature value and the outdoor temperature value is smaller than the temperature difference threshold value, the smoke discharging channel and the fresh air channel are kept open, and the first heat exchange channel and the second heat exchange channel are kept closed;
and when the difference value between the indoor temperature value and the outdoor temperature value is larger than the temperature difference threshold value, keeping the smoke discharging channel and the fresh air channel closed, and keeping the first heat exchange channel and the second heat exchange channel open.
2. The control method according to claim 1, characterized in that after the step of "judging whether the outdoor temperature value is less than a preset minimum human body suitable temperature value", further comprising:
when the outdoor temperature value is greater than or equal to a preset minimum human body proper temperature value, the smoke discharging channel and the fresh air channel are kept open, and the first heat exchanging channel and the second heat exchanging channel are kept closed.
3. The control method according to claim 1, characterized in that after the step of "judging whether the current indoor air pressure value is smaller than the initial indoor air pressure value", further comprising:
And when the current indoor air pressure value is equal to the initial indoor air pressure value, keeping the smoke exhaust channel open, and keeping the fresh air channel, the first heat exchange channel and the second heat exchange channel closed.
4. The control system of the smoke exhaust ventilator is characterized in that a smoke exhaust channel, a fresh air channel, a first heat exchange channel and a second heat exchange channel are arranged in the smoke exhaust ventilator; the smoke exhaust channel is used for directly communicating a smoke exhaust port of the smoke exhaust ventilator body with the outside, the fresh air channel is used for directly communicating an indoor space where the smoke exhaust port of the smoke exhaust ventilator body is located with the outside, the first heat exchange channel is used for communicating the smoke exhaust port of the smoke exhaust ventilator body with the outside after passing through the heat exchanger, the second heat exchange channel is used for communicating the indoor space where the smoke exhaust port of the smoke exhaust ventilator body is located with the outside after passing through the heat exchanger, and the control system comprises an acquisition module, a judging module, a comparing module and a control module;
the acquisition module is used for acquiring an initial indoor air pressure value before the smoke exhaust ventilator is started and a current indoor air pressure value after the smoke exhaust ventilator runs for a preset time;
the judging module is used for judging whether the current indoor air pressure value is smaller than the initial indoor air pressure value or not;
When the current indoor air pressure value is smaller than the initial indoor air pressure value, the acquisition module is further used for acquiring an indoor temperature value and an outdoor temperature value;
the judging module is also used for judging whether the outdoor temperature value is smaller than a preset minimum human body proper temperature value or not;
when the outdoor temperature value is smaller than the minimum human body proper temperature value, the comparison module is further used for comparing the difference value between the indoor temperature value and the outdoor temperature value with a preset temperature difference threshold value;
the control module is used for controlling the opening and closing of the smoke discharging channel, the fresh air channel, the first heat exchange channel and the second heat exchange channel according to the comparison result;
after the acquisition module is further configured to acquire an indoor temperature value and an outdoor temperature value,
the judging module is also used for respectively judging whether the outdoor temperature value and the indoor temperature value are larger than a preset maximum suitable temperature value of a human body or not;
when the outdoor temperature value is larger than the highest human body proper temperature value and the indoor temperature value is smaller than the highest human body proper temperature value, the control module is further used for keeping the smoke exhaust channel and the fresh air channel closed and keeping the first heat exchange channel and the second heat exchange channel open;
The control module is used for controlling the opening and closing of the smoke exhaust channel, the fresh air channel, the first heat exchange channel and the second heat exchange channel according to the comparison result, and comprises the following steps:
when the difference value between the indoor temperature value and the outdoor temperature value is smaller than the temperature difference threshold value, the control module is used for keeping the smoke discharging channel and the fresh air channel open and keeping the first heat exchanging channel and the second heat exchanging channel closed;
when the difference value between the indoor temperature value and the outdoor temperature value is larger than the temperature difference threshold value, the control module is used for keeping the smoke exhaust channel and the fresh air channel closed and keeping the first heat exchange channel and the second heat exchange channel open.
5. The control system of claim 4, wherein after the determining module is further configured to determine whether the outdoor temperature value is less than a preset minimum human body temperature value, when the outdoor temperature value is greater than or equal to the preset minimum human body temperature value, the control module is further configured to keep the smoke exhaust channel and the fresh air channel open and keep the first heat exchange channel and the second heat exchange channel closed.
6. The control system of claim 4, wherein after the determining module determines whether the current indoor air pressure value is less than the initial indoor air pressure value,
when the current indoor air pressure value is equal to the initial indoor air pressure value, the control module is further used for keeping the smoke exhaust channel open and keeping the fresh air channel, the first heat exchange channel and the second heat exchange channel closed.
CN202010589624.7A 2020-06-24 2020-06-24 Control method and system of smoke exhaust ventilator Active CN111878862B (en)

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