CN213019780U - Smoke exhaust ventilator - Google Patents

Abstract

The utility model belongs to the technical field of air treatment equipment, concretely relates to smoke ventilator. The utility model discloses aim at solving current smoke ventilator and need open door or window and the direct outdoor cold air introduction that leads to is indoor in order to guarantee indoor outer atmospheric pressure keep balance when using, reduced the problem of user's comfort level. Mesh for this reason, in the utility model provides a pair of in smoke ventilator, under outdoor chilly condition, the initial indoor air pressure value before smoke ventilator starts is less than under the condition of the current indoor air pressure value after smoke ventilator operation preset time as smoke ventilator's baroceptor, can discharge smoke exhaust port exhaust of smoke ventilator outdoor again through heat exchanger's first passageway, it is indoor to make outdoor air reentrant through heat exchanger's second passageway simultaneously, thereby can not only make indoor outer atmospheric pressure keep balanced when smoke ventilator moves, can also reduce indoor calorific loss, experience with user's use improvement.

Description

Smoke exhaust ventilator

Technical Field

The utility model belongs to the technical field of air treatment equipment, concretely relates to smoke ventilator.

Background

The range hood rapidly pumps waste burned by the stove, oil smoke harmful to human bodies generated in the cooking process and indoor air to the outdoor so as to ensure the indoor environmental quality. In the operation process of the range hood, because indoor air is pumped out of a room, a door or a window is generally required to be opened, and the air pressure inside and outside the room can be kept balanced. However, when the outdoor ambient temperature is low, direct introduction of outdoor air into the room may lower the indoor temperature, reducing the comfort of the user.

Accordingly, there is a need in the art for a new range hood that solves the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, namely to solve the problem that outdoor cold air is directly introduced into a room and the comfort of a user is reduced because a door or a window needs to be opened to ensure the balance of indoor and outdoor air pressure when the existing range hood is used, the utility model provides a range hood, which comprises a range hood body, a heat exchanger, a smoke exhaust channel for communicating a smoke exhaust port of the range hood with the outside and a fresh air channel for communicating the inside of the room where the smoke exhaust port of the range hood body is located with the outside; the heat exchanger comprises a first channel and a second channel which can selectively exchange heat with each other; the air inlet of the first channel is connected to one end, close to the range hood body, of the smoke exhaust channel, and the air outlet of the first channel is connected to one end, close to the outdoor, of the smoke exhaust channel; the air inlet of the second channel is connected with one end, close to the outdoor, of the fresh air channel, and the air outlet of the second channel is connected with one end, close to the indoor, of the fresh air channel; the range hood further comprises an air pressure sensor arranged indoors.

As a preferred technical solution of the above range hood provided by the present invention, a first valve is disposed on the first channel, and a second valve is disposed on the smoke exhaust channel between the air inlet and the air outlet of the first channel; or the range hood comprises a first electric valve, the first electric valve comprises a first rotating shaft, a first wind shield and a first stepping motor, the first wind shield is connected to the air inlet of the first channel through the first rotating shaft, and the first wind shield is arranged to selectively close the smoke exhaust channel or the first channel when driven by the first stepping motor to rotate around the first rotating shaft.

As a preferred technical solution of the above range hood provided by the present invention, the second channel is provided with a third valve, and the fresh air channel is provided with a fourth valve between the air inlet and the air outlet of the second channel; or the range hood comprises a second electric valve, the second electric valve comprises a second rotating shaft, a second air baffle and a second stepping motor, the second air baffle is connected to an air outlet of the second channel through the second rotating shaft, and the second air baffle is arranged to selectively close the fresh air channel or the second channel when rotating around the second rotating shaft under the driving of the second stepping motor.

As the utility model provides an above-mentioned smoke ventilator's an optimal technical scheme, the new trend passageway is being provided with the fifth valve near outdoor or indoor one end.

As a preferable technical solution of the above range hood provided by the present invention, the range hood further includes at least one of a first temperature sensor and a second temperature sensor; the first temperature sensor is used for monitoring outdoor temperature, and the second temperature sensor is used for monitoring indoor temperature.

As a preferable technical solution of the above range hood provided by the present invention, the first temperature sensor is disposed at an end of the fresh air channel close to the outdoor; and/or the second temperature sensor is arranged on the outer wall of the smoke exhaust channel or the fresh air channel positioned at the indoor side; and/or the air pressure sensor is arranged on the outer wall of the smoke exhaust channel or the fresh air channel, which is positioned at the indoor side.

As the utility model provides an above-mentioned smoke ventilator's an optimal technical scheme, be provided with on the smoke ventilator body can control its self baroceptor first temperature sensor with open or the switch who closes in the time of second temperature sensor.

As a preferred technical solution of the above range hood provided by the present invention, a first filtering device is disposed in the first channel near the air inlet; and/or a second filtering device is arranged at one end of the fresh air channel close to the outdoor.

As a preferred technical solution of the above range hood provided by the present invention, a fan is disposed at one end of the fresh air channel close to the room; or a fan is arranged at the air inlet of the second channel.

As the utility model provides an above-mentioned smoke ventilator's an optimal technical scheme, be provided with the heat exchange core among the heat exchanger, first passageway with the second passageway sets up to all passing through the inside of heat exchange core.

The utility model provides a pair of in smoke ventilator, under outdoor chilly condition, initial indoor atmospheric pressure value before smoke ventilator starts is less than under the condition of the current indoor atmospheric pressure value after smoke ventilator operation preset time when smoke ventilator's baroceptor detects, can discharge smoke ventilator's exhaust port exhaust cigarette outdoor again through heat exchanger's first passageway, it is indoor to make outdoor air reentrant through heat exchanger's second passageway simultaneously, thereby can not only make indoor outer atmospheric pressure keep balance when smoke ventilator moves, can also reduce indoor calorific loss, experience with user's use improvement.

Furthermore, the utility model provides a pair of in smoke ventilator, still set up first motorised valve at the air intake of first passageway, so, only need rotate through the first pivot of control first step motor drive can realize the purpose that the deep bead selectively opened smoke exhaust passage or first passageway or closed, the smoke ventilator inner space that needs occupy is little, and still has convenient and low-cost advantage.

Drawings

The range hood of the present invention will be described with reference to the accompanying drawings. In the drawings:

fig. 1 is a schematic structural view of the range hood of the present embodiment in a state where only the smoke evacuation channel is open;

fig. 2 is a schematic structural view of the range hood of the present 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 of the embodiment in a state that the first heat exchange channel and the second heat exchange channel are simultaneously opened;

fig. 4 is a schematic view of a first passage and a second passage of the heat exchanger in the hood of the present embodiment;

fig. 5 is a flowchart illustrating a method for controlling the range hood according to this embodiment.

List of reference numerals

1-a smoke exhaust ventilator body; 11-a power switch;

2-a heat exchanger; 21-a first channel; 22-a second channel; 23-a heat exchange core;

31-smoke exhaust channel; 32-a fresh air channel;

41-a first heat exchange channel; 42-a second heat exchange channel;

51-a barometric pressure sensor; 52-a first temperature sensor; 53-a second temperature sensor;

61-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 will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the air pressure sensor, the second temperature sensor, and the power switch are disposed at positions other than the body of the range hood, such as an indoor wall, the positional relationship is not constant, and those skilled in the art can adjust the air pressure sensor, the second temperature sensor, and the power switch as needed to adapt to specific applications without departing from the principles of the present invention. For example, the second temperature sensor and the air pressure sensor can be arranged on the outer wall of the smoke exhaust channel or the outer wall of the fresh air channel, which is positioned at the indoor side, and the power switch can also be arranged on the range hood body.

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, nor should they be construed as limiting the present invention. Furthermore, in the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected 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 specific situations.

In order to solve the above problems in the prior art, that is, to solve the problem that when the existing range hood is used, in order to keep the air pressure inside and outside the room balanced, the door or window needs to be opened, so that outdoor cold air is directly introduced into the room, and the comfort of the user is reduced, 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 passage 21 and a second passage 22 able to selectively exchange heat with each other, please refer to the three main operating modes of the extractor 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 range hood 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 outdoor (see fig. 4); the air inlet of the second channel 22 is connected to one end of the fresh air channel 32 close to the outdoor, and the air outlet of the second channel 22 is connected to one end of the fresh air channel 32 close to the indoor (see fig. 4); the hood further includes an air pressure sensor 51 disposed indoors.

For example, the heat exchanger 2 is only applied to a full-hot fresh air blower 8 or a fresh air conditioner at present, a heat exchange core 23 is arranged in each general heat exchanger 2, and the first channel 21 and the second channel 22 are arranged to exchange heat through the inside of the heat exchange core 23. The common heat exchangers 2 include a rotary total heat exchanger 2 and a plate-fin total heat exchanger 2.

Wherein, baroceptor 51 can set up on smoke exhaust passage 31 or new trend passageway 32 are located the outer wall of indoor side, makes baroceptor 51 and smoke exhaust passage 31 or new trend passageway 32 form wholly like this, can make the smoke ventilator whole succinctly, is favorable to simplifying smoke ventilator's installation. In addition, the air pressure sensor 51 is preferably disposed at a position far from the smoke suction port of the range 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 operating modes:

(1) in the state of the range hood as shown in fig. 1, only the smoke exhaust channel 31 is opened, and the application scenarios of the working mode are as follows: the air pressure balance between the indoor and the outdoor is kept by opening the door or the window of the kitchen, and the temperature difference between the indoor and the outdoor is not large;

(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 scenarios of the working modes are as follows: when the door and the window of the kitchen are closed, the indoor air pressure and the outdoor air pressure can be kept balanced by opening the fresh air channel 32, and the difference between the indoor air temperature and the outdoor air temperature is not large;

(3) in the state of the range hood as shown in fig. 3, the first heat exchange channel 41 and the second heat exchange channel 42 are simultaneously opened, and the application scenarios of the working modes are as follows: when the door and the window of the kitchen are closed, the outdoor temperature is not in the human body proper temperature range, and the indoor temperature is in the human body proper temperature range, for example, the outdoor temperature is cold in winter, the indoor temperature is relatively warm due to the heat generated by heating equipment or cooking, and the heat can be recovered through the heat exchanger 2 to reduce the indoor heat loss.

It will be appreciated that the first heat exchange channel 41 is formed by a portion of the first channel 21 and the smoke evacuation 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, as can be seen in the figures.

In the range hood provided in this embodiment, under the cold outdoor condition, when the pressure sensor 51 of the range hood detects that the initial indoor air pressure value before the range hood is turned on is less than the current indoor air pressure value after the range hood runs for the preset time, the smoke exhausted from the smoke exhaust port of the range hood can be exhausted to the outdoor through the first channel 21 of the heat exchanger 2 (or can be completely expressed as passing through the first heat exchange channel 41), and meanwhile, the outdoor air can be enabled to reenter the indoor through the second channel 22 of the heat exchanger 2 (or can 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 is operated, the indoor heat loss can be reduced, and the use experience of a user can be improved.

As a preferred embodiment of the 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 to the air inlet of the first passage 21 through the first rotating shaft, and the first wind shield is arranged to selectively seal the smoke exhaust passage 31 or the first passage 21 when being driven by the first stepping motor to rotate around the first rotating shaft. For example, fig. 1 and 2 show a case where the smoke evacuation channel 31 is opened and the first channel 21 is closed, and fig. 3 and 4 show a case where the smoke evacuation channel 31 is closed and the first channel 21 is opened.

It will be appreciated that opening the smoke evacuation channel 31 can be achieved when the first valve is closed and the second valve is open; when the first valve is opened and the second valve is closed, the first heat exchange passage 41 can be opened.

As a preferred embodiment of the 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 on the fresh air channel 32 between the air inlet and the air outlet of the second channel 22; or the range hood comprises a second electric valve 62, the second electric valve 62 comprises a second rotating shaft, a second air baffle and a second stepping motor, the second air baffle is connected to the air outlet of the second channel 22 through the second rotating shaft, and the second air baffle is arranged to selectively close the fresh air channel 32 or the second channel 22 when being driven by the second stepping motor to rotate around the second rotating shaft. For example, fig. 2 shows the fresh air channel 32 open and the second channel 22 closed, and fig. 3 and 4 show the fresh air channel 32 closed and the second channel 22 open.

It will be appreciated that when the third valve is closed and the fourth valve is open, the fresh air channel 32 may be opened; with the third valve open and the fourth valve closed, opening of the second passage 22 may be achieved.

In a preferred embodiment of the range hood provided in this embodiment, the fresh air channel 32 is provided with a fifth valve 63 at an end near the outside or the inside. Wherein, the fifth valve 63 is used for controlling whether the outdoor air enters the room through the fresh air channel 32 or the second heat exchange channel 42.

For example, the first valve, the second valve, the third valve, the fourth valve and the fifth valve 63 may be selected to be solenoid valves or electric valves, so that the range hood can be automatically controlled.

In the range hood provided by the embodiment, the first electric valve 61 is arranged at the air inlet of the first passage 21, so that the purpose that the smoke exhaust passage 31 or the first passage 21 is selectively opened or closed by the wind shield can be realized only by controlling the first stepping motor to drive the first rotating shaft to rotate, the occupied internal space of the range hood is small, and the range hood further has the advantages of convenience and low cost. For the advantages of the second electric valve 62, please refer to the first electric valve 61, which is not described herein. Therefore, only two valves, namely 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, so that the switching efficiency, the manufacturing cost and the like are greatly improved.

As a preferable embodiment of the 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 to monitor the outdoor temperature, and the second temperature sensor 53 is used to monitor the indoor temperature.

Illustratively, the first temperature sensor 52 may be disposed at an end of the fresh air channel 32 near the outdoor to monitor the outdoor temperature, and facilitate the integrated arrangement of the range hood. However, it is understood that the first sensor may be disposed directly outdoors to monitor the outdoor temperature.

The second temperature sensor 53 can be disposed on the outer wall of the smoke exhaust channel 31 or the fresh air channel 32 located at the indoor side to monitor the indoor temperature, and also to make the range hood implement an integrated design. However, it is to be understood that the second temperature sensor 53 may be provided at a wall or the like in a 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, that is, whether the first heat exchange channel 41 and the second heat exchange channel 42 need to be switched on or not, 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, so as to reduce the indoor heat loss.

As a preferred embodiment of the range hood provided in this embodiment, the range hood body 1 is provided with a power switch 11 which can control the simultaneous on/off of the range hood body, the air pressure sensor 51, the first temperature sensor 52, and the second temperature sensor 53. It is understood 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 start their respective monitoring functions.

In a preferred embodiment of the range hood provided in this embodiment, since the range hood absorbs the smoke and the oil and other impurities, 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.

Similarly, in order to prevent impurities such as dust in the outdoor air from entering the fresh air channel 32, contaminating or blocking the fresh air channel 32 or the second channel 22 of the heat exchanger 2, and even directly bringing the impurities into the room, which affects the indoor cleanness, a second filtering device 72 may be disposed at one end of the fresh air channel 32 near the outdoor.

It can be understood that, under the circumstances of door and window closeness, smoke ventilator discharges the room air outdoor, and indoor atmospheric pressure can reduce, and when opening new trend passageway 32 or second heat transfer passageway 42, outdoor air can gush into indoorly through new trend passageway 32 or second heat transfer passageway 42 under the effect of indoor outer atmospheric pressure difference, but if only rely on smoke ventilator body drive indoor outer air flow, can cause smoke ventilator's load too big, influence smoke ventilator's working effect. In order to ensure the working effect of the range hood and the normal exchange of indoor and outdoor air, a fan 8 can be arranged at one end of the fresh air channel 32 close to the indoor space.

In addition, a fan 8 can be arranged at the air inlet of the second channel 22, so that the purpose of introducing outdoor air into the room through the second heat exchange channel 42 is achieved.

Of course, the above alternative embodiments, and the alternative embodiments and the preferred embodiments can also be used in a cross-matching manner, so that a new embodiment is combined to be suitable for a more specific application scenario.

In addition, in order to solve the above problems in the prior art, that is, to solve the problem that the comfort of the user is reduced by directly introducing outdoor cold air into the room due to the fact that a door or a window needs to be opened to ensure that the indoor and outdoor air pressures are kept balanced when the existing range hood is used, the embodiment further provides a control method of the range hood, and 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 the smoke exhaust port of the range hood body 1 with the outdoor, the fresh air channel 32 is used for directly communicating the indoor with the outdoor where the smoke suction port of the range hood body 1 is located, the first heat exchange channel 41 is used for communicating the smoke exhaust port of the range hood body 1 with the outdoor after passing through the heat exchanger 2, and the second heat exchange channel 42 is used for communicating the indoor where the smoke suction port of the range hood body 1 is located with the outdoor 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 the range hood and a current indoor air pressure value after the range hood runs for a preset time;

for example, an initial indoor air pressure value can be obtained by the air pressure sensor 51 in the above-mentioned embodiment of the range hood within the first 1 second or a short time of the start of the range hood body 11; the preset time may be set to any value of 20 seconds to 60 seconds enough to allow 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;

it is understood that the step S2 is to automatically determine whether the kitchen can be circulated through the door and the window equal to 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 can be understood that when the current indoor air pressure value is smaller than the initial indoor air pressure value, it indicates that the 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 also needs to be determined according to the specific conditions of the indoor temperature and the outdoor temperature.

S4, judging whether the outdoor temperature value is smaller than the preset lowest human body proper temperature value or not;

s5, when the outdoor temperature value is smaller than the lowest 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;

illustratively, the lowest human fitness temperature value may be set to 17 degrees celsius, when the outdoor temperature is significantly below this value, indicating that the outdoor environment is cold; the preset temperature difference threshold value can be set to any value of 1 to 5 degrees centigrade, the indoor temperature is generally higher than the outdoor temperature, and by comparing the difference value between the indoor temperature value and the outdoor temperature value with the preset temperature difference threshold value, whether the indoor heat needs to be recovered or not can be known, that is, whether the heat exchanger 2 needs to be started or not, and the first heat exchange channel 41 and the second heat exchange channel 42 are opened or not can be known.

And S6, 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.

It should be noted that, although the detailed steps of the method of the present embodiment are described in detail above, those skilled in the art can combine, split and change the order of the above steps without departing from the basic principle of the present embodiment, and the modified technical solution does not change the basic concept of the present embodiment, and therefore, the method also belongs to the scope of the description of the present embodiment. For example, the step of obtaining the initial indoor air pressure value before the range hood is turned on and the current indoor air pressure value after the range hood operates for the preset time in the step S1 and the step of obtaining the indoor temperature value and the outdoor temperature value in the step S3 may be performed simultaneously.

According to the control method of the range hood of the embodiment, 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 suitable temperature value, 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 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. Like this, under outdoor chilly condition, can open first heat transfer passageway 41 and second heat transfer passageway 42 to can not only make indoor outer atmospheric pressure keep balance when smoke ventilator moves, can also reduce indoor calorific loss, experience with the use that improves the user.

As a preferable implementation of the above control method provided in this embodiment, in step S6, the step of "controlling the opening and closing of the smoke evacuation 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 value between the indoor temperature value and the outdoor temperature value is smaller than the temperature difference threshold 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; when the difference value between the indoor temperature value and the outdoor temperature value is greater than the temperature difference threshold value, 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 opened.

It can be understood that, when the difference between the indoor temperature value and the outdoor temperature value is greater than the temperature difference threshold value, it indicates that the indoor temperature is much higher than the outdoor temperature, and under the severe cold condition of the outdoor air, the heat exchanger 2 is opened to keep the first heat exchange channel 41 and the second heat exchange channel 42 opened, so that the outdoor air can recover the heat in the flue gas when entering the room, thereby reducing the indoor heat loss and improving the user experience.

As a preferred implementation manner of the above control method provided in this embodiment, after the step of determining whether the outdoor temperature value is less than the preset lowest 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. So, only need let outdoor natural wind directly get into indoorly, can guarantee indoor outer pressure balance, play the renewal effect to the room air simultaneously to improve user's use and experience.

As a preferable implementation manner of the foregoing control method provided in this 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 galley is in direct air flow communication with the exterior 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 above control method provided in this embodiment, after the step of "acquiring 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 greater than a preset highest human body proper temperature value; when the outdoor temperature value is greater than the highest human body suitable temperature value and the indoor temperature value is less than the highest human body suitable temperature value, 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 opened.

It can be understood that the highest human body suitable temperature value can be set to be 25 ℃, when the outdoor temperature is higher, if the kitchen is empty to modulate cold, the indoor temperature can be lower than the outdoor temperature, and the indoor temperature is in the human body suitable temperature value range; at this moment, 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, and the problems of poor refrigeration effect of the air conditioner, electric energy waste and the like are avoided.

It should be understood 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) or a processor (processor) to perform some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

In addition, the present embodiment further provides a control system of a range hood, where the control system of the range hood is a product corresponding to the control method, and only briefly described here, the related contents 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 range hood body 1 with the outdoor, the fresh air channel 32 is used for directly communicating the indoor with the outdoor where a smoke suction port of the range hood body 1 is located, the first heat exchange channel 41 is used for communicating the smoke exhaust port of the range hood body 1 with the outdoor after passing through the heat exchanger 2, the second heat exchange channel 42 is used for communicating the indoor where the smoke suction port of the range hood body 1 is located with the outdoor after passing through the heat exchanger 2, and the control system comprises an acquisition module, a judgment module, a comparison module and a control module; the acquisition module is used for acquiring an initial indoor air pressure value before the range hood is started and a current indoor air pressure value after the range hood 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; the acquisition module is also used for acquiring an indoor temperature value and an outdoor temperature value when the current indoor air pressure value is smaller than the initial indoor air pressure value; the judging module is also used for judging whether the outdoor temperature value is smaller than the preset lowest human body proper temperature value or not; when the outdoor temperature value is smaller than the lowest human body proper temperature value, the comparison module is also used for comparing the difference value of 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 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.

As a preferred embodiment of the above-mentioned control system provided in this embodiment, the "control module is configured to control 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 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 exhaust channel 31 and the fresh air channel 32 open and keeping the first heat exchange channel 41 and the second heat exchange channel 42 closed; when the difference between the indoor temperature value and the outdoor temperature value is greater than the temperature difference threshold value, 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 control system provided in this embodiment, after the "determining module is further configured to determine whether the outdoor temperature value is smaller 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 above control system provided in this embodiment, after the "determining module is configured to determine 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 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 "obtaining module is further configured to obtain an indoor temperature value and an outdoor temperature value", the determining module is further configured to respectively determine whether the outdoor temperature value and the indoor temperature value are greater than a preset highest human body suitable temperature value; when the outdoor temperature value is greater than the highest human body suitable temperature value and the indoor temperature value is less than the highest human body suitable temperature value, the control module is further used for keeping the smoke exhaust channel 31 and the fresh air channel 32 closed and keeping the first heat exchange channel 41 and the second heat exchange channel 42 open.

It should be noted that, the control system of the range hood provided in the foregoing embodiment is exemplified by only the division of the above function modules (such as the obtaining module, the judging module, the comparing module, and the control module), and in practical applications, the function modules may be completed by different function modules according to needs, that is, the function modules in this embodiment may be further decomposed or combined, for example, the function modules in the foregoing embodiment may be combined into one function module, or may be further split into multiple sub-modules, so as to complete all or part of the functions described above. The names of the functional modules referred to in the present embodiment are merely for differentiation and are not considered to be inappropriate descriptions of the present embodiment.

Furthermore, those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, 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.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. A range hood is characterized by comprising a range hood body, a heat exchanger, a smoke exhaust channel and a fresh air channel, wherein the smoke exhaust channel is used for communicating a smoke exhaust port of the range hood with the outside, and the fresh air channel is used for communicating the inside of a room where the smoke exhaust port of the range hood body is located with the outside;

the heat exchanger comprises a first channel and a second channel which can selectively exchange heat with each other; the air inlet of the first channel is connected to one end, close to the range hood body, of the smoke exhaust channel, and the air outlet of the first channel is connected to one end, close to the outdoor, of the smoke exhaust channel; the air inlet of the second channel is connected with one end, close to the outdoor, of the fresh air channel, and the air outlet of the second channel is connected with one end, close to the indoor, of the fresh air channel;

the range hood further comprises an air pressure sensor arranged indoors.

2. The range hood of claim 1, wherein the first channel is provided with a first valve, and the smoke exhaust channel is provided with a second valve between an air inlet and an air outlet of the first channel; or

The range hood comprises a first electric valve, the first electric valve comprises a first rotating shaft, a first wind shield and a first stepping motor, the first wind shield is connected to an air inlet of the first channel through the first rotating shaft, and the first wind shield is arranged to selectively close the smoke exhaust channel or the first channel when being driven by the first stepping motor to rotate around the first rotating shaft.

3. The range hood of claim 1, wherein a third valve is disposed on the second channel, and a fourth valve is disposed on the fresh air channel between the air inlet and the air outlet of the second channel; or

The range hood comprises a second electric valve, the second electric valve comprises a second rotating shaft, a second air baffle and a second stepping motor, the second air baffle is connected to an air outlet of the second channel through the second rotating shaft, and the second air baffle is arranged to selectively seal the fresh air channel or the second channel when rotating around the second rotating shaft under the driving of the second stepping motor.

4. The range hood of claim 1, wherein the fresh air channel is provided with a fifth valve at an end near the outside or the inside of the room.

5. The range hood of claim 1, further comprising at least one of a first temperature sensor and a second temperature sensor;

the first temperature sensor is used for monitoring outdoor temperature, and the second temperature sensor is used for monitoring indoor temperature.

6. The range hood of claim 5, wherein the first temperature sensor is disposed at an end of the fresh air channel adjacent to the outside; and/or

The second temperature sensor is arranged on the outer wall of the smoke exhaust channel or the fresh air channel, which is positioned at the indoor side; and/or

The air pressure sensor is arranged on the outer wall of the smoke exhaust channel or the outer wall of the fresh air channel, which is positioned at the indoor side.

7. The range hood of claim 5, wherein the range hood body is provided with a power switch capable of controlling the simultaneous on and off of the range hood body, the air pressure sensor, the first temperature sensor and the second temperature sensor.

8. The range hood of claim 1, wherein a first filter device is disposed in the first passage adjacent the air inlet thereof; and/or

And a second filtering device is arranged at one end, close to the outdoor, in the fresh air channel.

9. The range hood of claim 1, wherein a fan is disposed at an end of the fresh air channel adjacent to the room; or

And a fan is arranged at the air inlet of the second channel.

10. The range hood of claim 1, wherein a heat exchange core is disposed in the heat exchanger, and the first and second passages are both disposed to pass through an interior of the heat exchange core.

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