WO2020133918A1

WO2020133918A1 - Residual water prevention range hood

Info

Publication number: WO2020133918A1
Application number: PCT/CN2019/089877
Authority: WO
Inventors: 吴先锋; 李桂玉
Original assignee: 李桂玉
Priority date: 2018-12-26
Filing date: 2019-06-03
Publication date: 2020-07-02
Also published as: CN109373413B; CN109373413A

Abstract

Disclosed is a residual water prevention range hood, comprising: a housing (1), a fume exhaust duct (2), a fan (3), a blowing duct (5) and a controller (6), wherein during cooking, the controller (6) controls the fan (3) to rotate forwards, such that an air flow is generated in the fume exhaust duct (2) and flows towards the outside, so as to absorb oil fumes generated by a piece of cookware (4); after cleaning the cookware, the controller first controls an electric shutter (23) to close to block a fume exhaust port (21), and then controls the fan (3) to rotate backwards, such that the air flow is generated in the fume exhaust tube (2) and flows towards the room, and air passes through the blowing duct (5) and blows the air flow from the blowing port (51) to the cookware (4) so as to accelerate the evaporation of residual water in the cookware (4). According to the residual water prevention range hood, by means of adding the blowing duct (5) that is connected to the fume exhaust duct (2), and by using the backwards rotation of the fan (3), the range hood can blow the air flow towards the cookware (4) so as to accelerate the evaporation of the residual water in the cookware (4) and keep the cookware (4) dry, thereby preventing the cookware (4) from rusting due to the residual water.

Description

Water-proof residual range hood

This application requires the priority of the Chinese patent application filed on December 26, 2018, with the application number 201811603659.0 and the invention titled "a waterproof residual range hood", the entire contents of which are incorporated by reference in this application.

Technical field

This application relates to the field of smart home technology, in particular to a waterproof residual range hood.

Background technique

In life, it is necessary to rinse and clean the pot after each cooking. After cleaning, water often remains in the pot. If it is not cleaned in time, the pot will easily rust under the action of the residual water. In order to avoid the rust of the cookware, it is necessary to wipe the cookware with a rag after each cleaning, and wipe off the residual water on the cookware. In practice, it can also be heated again, or the pot is placed upright to remove the residual moisture in the pot. It can be seen that the existing method not only causes inconvenience to the user, but also may cause burns to the user due to the residual heat of the pot after each cooking.

In order to avoid the rust of the cookware, it is possible to prevent the pot material from contacting the air and the residual water by providing a coating on the inner surface of the pot, such as PTFE. However, the coating on the surface of the pot is easily damaged during the cooking process, so the user has to use a wooden spatula or a plastic spatula, which is also inconvenient. In addition, if the coating on the cookware is of poor quality, under certain high-temperature and acidic conditions, it will decompose to produce harmful substances, affecting food health.

Summary of the invention

The present application provides a waterproof residual range hood to solve the problem that the traditional pots have residual moisture after cleaning and make the pots easy to rust.

The waterproof residual range hood provided by the present application includes a casing, a smoke exhaust pipe and a fan, the fan is provided on the smoke exhaust pipe to form an air flow in the smoke exhaust pipe, and one end of the smoke exhaust pipe is provided There is a smoking port, and a smoke exhaust port is provided at the other end, the smoking port and the smoke exhaust port are provided on the casing, the smoking port is located above the pot to absorb the oil smoke generated by the pot; the smoking port The location also has an electric shutter that can block the smoking port, and the range hood further includes a blowing duct and a controller;

The blower duct communicates with the smoke exhaust duct above the electric shutter, the blower duct extends from the smoke exhaust duct to a blower outlet, the blower outlet is provided at the bottom of the housing, and is placed near the pot Position; the controller is connected to the fan and the electric shutter, respectively, to control the electric shutter to block the smoking port, and to control the reverse operation of the fan, through the blowing duct to the pot airflow.

In actual application, during normal cooking, the controller controls the fan to rotate forward, so that the air flow from the smoke exhaust pipe to the outdoor is generated, and the oil smoke generated by the pot is absorbed. After cleaning the pot, the controller first controls the electric shutters to close to block the smoking port. Then control the fan to reverse, so that the air flow from the smoke exhaust pipe to the room is generated, the air is passed through the blowing duct, and the air flow is blown from the blowing port to the pot to accelerate the evaporation of the remaining moisture in the pot. The waterproof residual range hood provided by this application, by adding a blower duct connected to the smoke exhaust pipe, and using the fan to reverse, the range hood can blow the airflow to the cookware, quickly evaporate the residual moisture on the cookware, and maintain the cookware Drying to avoid the rusting of pots due to residual moisture, solving the problem of residual water after cleaning in traditional pots and making the pots rust easily.

BRIEF DESCRIPTION

In order to more clearly explain the technical solution of the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, for those of ordinary skill in the art, without paying creative labor, Other drawings can also be obtained from these drawings.

1 is a schematic structural diagram of a waterproof residual range hood of the present application;

Figure 2 is a front cross-sectional structural diagram of the waterproof residual range hood of the present application;

Fig. 3 is a side sectional structural view of the waterproof residual range hood of the present application;

4 is a schematic diagram of the structure of the electric shutter of the application;

FIG. 5 is a three-dimensional schematic diagram of the waterproof residual range hood of the present application.

detailed description

Referring to FIGS. 1 and 2, FIG. 1 is a schematic structural diagram of a waterproof residual range hood of the present application, and FIG. 2 is a front cross-sectional structural diagram of the waterproof residual range hood of the present application. The waterproof residual range hood provided by the present application includes a casing 1, a smoke exhaust pipe 2 and a fan 3.

Among them, the housing 1 is used to install and protect internal components. As shown in FIGS. 1 and 5, the housing 1 in this application may include three parts, namely an upper part, a middle part and a lower part. Among them, the upper part of the housing 1 is used to install the fan 3 and the smoke exhaust duct 2, and can be set to a suitable shape according to the structure of the fan 3 and the smoke exhaust duct 2, for example, the rectangular structure shown in FIG. 1; the middle of the housing 1 , Used to install the controller 6 and the control panel of the range hood, the shape of the middle of the housing 1 can be adapted to the shape of the upper part, and is located at a height that is convenient for the user to operate; the lower part of the housing 1 is used to install the blowing duct 5 and the blowing port 51 and a sensor for detecting when air blowing is required, such as a temperature sensor 11 or a camera. Exemplarily, as shown in FIG. 5, the middle and lower parts of the housing 1 may form a right-angled structure to facilitate the installation of the range hood on the wall.

As shown in FIG. 2 and FIG. 3, the fan 3 is provided on the smoke exhaust duct 2 to form a negative pressure through the operation of the fan 3 to form an air flow in the smoke exhaust duct 2. In this application, the fan 3 may use a fan with adjustable power, rotation speed and rotation direction. In order to obtain a better smoke exhaust effect, the fan 3 may use a turbo fan or a high-power exhaust fan. The smoke exhaust duct 2 may adopt a cylindrical structure. The smoke exhaust duct 2 is provided with a smoking port 21 at one end and a smoke exhaust port 22 at the other end. As shown in FIG. 2, the smoke exhaust duct 2 may be vertically arranged, the smoking port 21 is located at the lower end face of the smoke exhaust duct 2, and the smoke exhaust port 22 is located at the upper end face of the smoke exhaust duct 2. The smoking port 21 and the smoke exhaust port 22 are provided on the housing 1, and the smoke exhaust port 22 is connected to the flue of the building or extends to the outside. The smoking port 21 is located above the pot 4 to absorb the oil smoke generated by the pot 4.

In actual application, during the cooking process, the range hood needs to be used to absorb the fume, that is, the fan 3 is running forward, so that the pressure of the smoke exhaust pipe 2 changes, and the gas in the smoke exhaust pipe 2 faces the outdoor or smoke The flow in the direction of the duct generates negative pressure and air flow at the smoking port 21. The cooking utensils 4 will generate oil fumes during the cooking process. The oil fumes spread upward and around to reach the location near the smoking port 21, and can be discharged outside the room with the air flow in the smoke exhaust duct 2 to achieve the effect of absorbing the oil fumes.

In order to speed up the evaporation of the residual moisture on the cooker 4, the smoke exhaust duct 2 of the range hood provided by the present application is provided with electric shutters 23, which can be arranged at the position of the smoking port 21 of the smoke exhaust duct 2, and the electric shutters 23 can block the smoking port 21, and the range hood further includes a blowing duct 5 and a controller 6. Wherein, the electric shutter 23 may be a plurality of blade-shaped parts provided at the position of the smoking port 21, and the passage of the smoking port 21 may be switched by turning over the structure of each blade in the shutter.

As shown in FIG. 4, the electric louver 23 can be driven by a motor to turn over a plurality of blade-shaped components. Specifically, in some embodiments of the present application, the electric shutter 23 includes a motor 231, a transmission mechanism 232, and blades 233; a plurality of blades 233 are connected to the motor 231 through the transmission mechanism 232, and the motor 231 is connected to the controller 6. Among them, the transmission mode of the transmission mechanism 232 can be a chain transmission, one end of the blade 233 is provided with a sprocket, the transmission mechanism 232 includes a chain, and the output end of the motor 231 is also provided with a sprocket, and the sprocket on the motor 231 is connected to a plurality of through the chain The sprocket on the blade 233 drives the blade 233 to rotate when the motor 231 rotates.

In practical application, when the smoking opening 21 needs to be blocked by the electric shutter 23, a start signal can be sent through the controller 6 to control the motor 231 to rotate by a preset angle or a preset number of turns, and the chain wheel on the motor 231 drives the chain , Driving the sprocket on each blade 233 to rotate, so that the blade 233 is turned over, and a plurality of blades 233 form a blocking barrier to block the smoking port 21. In order to facilitate the control of the rotation of the motor 231, the motor 231 may be a servo motor or a stepper motor. In addition, the transmission mechanism 232 may also be provided with transmission components such as a speed reducer to output a specific transmission ratio to facilitate the control of the motor 231.

As shown in FIG. 3, the blower duct 5 communicates with the smoke exhaust duct 2 above the electric shutter 23, and the blower duct 5 extends from the smoke exhaust duct 2 to the blower opening 51 at the bottom of the housing 1. The air outlet 51 is located at the bottom of the housing 1, close to the placement position of the pot 4, so that the airflow from the air outlet 51 can directly act on the pot 4, increasing the air flow rate acting on the pot 4 and accelerating the residual moisture Evaporation rate. The controller 6 is connected to the fan 3 and the electric shutter 23 respectively to control the electric shutter 23 to block the smoking port 21, and controls the fan 3 to reverse, and sends the airflow to the pot 4 through the blowing duct 5. It should be noted that the controller 6 used in the present application refers to a processor chip that can realize information judgment and automatic control, such as a single-chip computer, a programmable logic controller, and the like. The controller 6 can be installed at a central position of the housing 1, which is the same as the position of the control panel, so as to realize circuit connection and make the overall structure of the range hood more compact.

In practical applications, under normal cooking conditions, the electric shutters 23 are in the open state, the fan 3 is running forward, and the oil smoke generated in the pot 4 is sucked in from the smoking port 21 by the air flow generated in the smoke exhaust pipe 2 and passes through the smoke exhaust pipe 2 to the smoke exhaust port 22, discharged to the outdoor, that is, normal oil fume operation. When the user cleans the pot 4 and needs to remove the residual water in the pot 4, the controller 6 sends a reverse signal to the fan 3 to control the fan 3 to rotate in the reverse direction, so that the Indoor airflow. At the same time, the controller 6 also sends a closing signal to the electric shutter 23 to control the motor 231 in the electric shutter 23 to rotate, so that the blade 233 of the electric shutter 23 is turned over, and the smoking port 21 is closed. At this time, the smoke exhaust duct 2 is only in communication with the blowing duct 5, so the airflow generated in the smoke exhaust duct 2 toward the room will flow from the blow duct 5 to the blow port 51. Finally, it acts on the pot 4 to speed up the air flow in the area where the pot 4 is located, that is, to perform the air-drying operation and accelerate the evaporation of the remaining moisture on the pot 4.

In the technical solution provided by the present application, the time when the fan 3 runs in reverse can be set according to the size and shape of the pot 4. For example, the area of the remaining water on the pan is larger and the evaporation speed is faster, so the time for the fan 3 to run in reverse can be set shorter; while the water in the round pan remains mostly at the bottom of the pan, so the fan 3 is required to run in reverse It takes a long time to completely evaporate the water.

In the technical solution provided by the present application, a blower duct 5 is added to the range hood, and the fan 3 is used to reverse the operation to blow airflow to the cookware 4 to accelerate the evaporation of the remaining moisture in the cookware 4. Therefore, in the technical solution provided by the present application, the solution for preventing the rusting of the pot 4 in the manner of air-drying operation can be applied to any type of pot without changing the user's cooking habits. In addition, during the normal cooking process, the air outlet 51 can also absorb oil fume at the same time as the smoking mouth 21, increasing the absorption efficiency of the oil fume.

In the technical solution provided by the present application, the gas conveyed outward in the blower duct 5 comes from the smoke exhaust duct 2, and in practical applications, the smoke exhaust duct 2 is generally connected to the outdoor or the flue of the building. When the shared flue design is adopted, there are often oil fumes from other rooms in the shared flue. The oil fumes are easily absorbed into the exhaust duct 2 due to the air flow to the room, so that the gas blown by the blower 51 also contains oil fumes, which will It produces odor and affects indoor air quality. In order to prevent the oil fume in the common flue from entering the room, in some embodiments of the present application, the range hood further includes an air intake duct 7, and a first valve 24 that can block the smoke exhaust port 22 is provided at the position of the smoke exhaust port 22. The air intake duct 7 is located between the first valve 24 and the fan 3 and communicates with the smoke exhaust duct 2. The intake pipe 7 is provided with a second valve 71 which can block the intake pipe 7; the first valve 24 and the second valve 71 are connected to the controller 6.

One end of the air intake duct 7 communicates with the smoke exhaust duct 2 and the other end leads to the indoor environment, that is, it is installed on the housing 1. During the normal cooking process, the first valve 24 on the smoke exhaust pipe 2 is in an open state, so that the smoke exhaust pipe 2 can normally discharge oil smoke outward, and the second valve 71 on the intake pipe 7 is closed to avoid smoke exhaust The oil smoke in the pipe 2 enters the indoor environment. When the range hood is required to blow the airflow to the pot 4, the controller 6 sends a closing command to the first valve 24 to close the first valve 24 and block the smoke exhaust pipe 2 and the flue. At the same time, an opening command is sent to the second valve 71 to open the second valve 71, so that the smoke exhaust pipe 2 and the intake pipe 7 communicate. At this time, the fan 3 reverses, and the air flow to the room is generated in the smoke exhaust duct 2. The air flow originates from the air intake duct 7. Since the air intake duct 7 communicates with the indoor environment, the air in the indoor environment is sent to the air intake duct 7, That is to avoid the oil fumes in the flue entering the room.

In this embodiment, the first valve 24 and the second valve 71 may adopt a baffle structure, that is, the passage control of the smoke exhaust pipe 2 is realized by the translation or inversion of the baffle. It should be noted that the control of the first valve 24 and the second valve 71 is reduced, and the control is simplified. In the technical solution provided by the present application, a one-way valve can also be used to replace the first valve 24 and the second valve 71. In practical applications, the first valve 24 may use a one-way valve to prevent the gas in the flue from entering the smoke exhaust pipe 2, that is, the one-way valve opens in the direction of the smoke duct 2 toward the flue, from the flue to the smoke duct 2 The direction is closed; the second valve 71 can use a one-way valve to prevent the gas in the smoke exhaust pipe 2 from entering the intake pipe 7, that is, the one-way valve is opened in the direction of the intake pipe 7 to the smoke exhaust pipe 2, from the smoke exhaust pipe 2 is closed in the direction of the intake duct 7.

In some embodiments of the present application, in order to speed up the evaporation of the residual water on the pot 4, a heater 52 is also provided on the blowing duct 5, and the heater 52 is connected to the controller 6 to start the heater when the fan 3 is reversed 52. Blow hot air for the cookware 4. In practical applications, when it is necessary to use the range hood to remove the water on the pot 4, the controller 6 sends a heating start signal to the heater 52. The heater 52 is activated to heat the gas flowing in the blowing duct 5. In this embodiment, the heater 52 may be a high-power resistance wire, so as to obtain higher heat in a short time and form hot air.

In order to realize automatic control, in some embodiments of the present application, a temperature sensor 11 is provided at the bottom of the housing 1, and the temperature sensor 11 is connected to the controller 6, so that the controller 6 controls the fan 3 according to the temperature detected by the temperature sensor 11 The timing of the reversal. In practical applications, after the cooking is completed, the temperature of the pot 4 gradually decreases. Therefore, the temperature of the pot 4 can be detected by the temperature sensor 11, and when the temperature is lower than the preset value, the controller 6 starts a corresponding air-drying control program, that is, the fan 3 is controlled to reverse. In order to detect the temperature on the pot 4 more accurately, the temperature sensor 11 may be a sensor based on infrared temperature sensing, that is, a non-contact temperature sensor.

In addition, in order to prevent misjudgment, a corresponding judgment program can also be built in the controller 6, and combined with other sensors, such as a camera, a proximity sensor, a human detection sensor, through the cooperation between the various sensors, the judgment program detects what To start air-drying. For example, in a feasible judgment scheme, the time when the pot 4 leaves the cooking position can be detected by the camera. If the leaving time is greater than the preset value, it is judged that the pot 4 is cleaned. When returning to the cooking position again, the The pot 4 implements an air-drying action. It is also possible to determine whether water remains in the pot 4 through image recognition, and when it contains water, perform an air-drying operation.

In some embodiments of the present application, at least two electric baffles 53 are provided at the position of the blower opening 51. The electric baffle 53 is connected to the controller 6 to control the opening and closing angle of the electric baffle 53 through the controller 6. In practical applications, since there may be multiple placement positions of the pots 4 in the cooking area, the range hood also needs to span a wider width. However, there may be only one pot 4 that needs to be air-dried. Therefore, a plurality of electric baffles 53 may be provided to control the air outlet 51 by region, that is, when the pot 4 in the area needs to be air-dried, the electric power of the corresponding area is turned on. Baffle 53. In this embodiment, the electric baffle 53 can reduce the opening area of the air outlet 51 to obtain a larger wind speed. In addition, by providing the electric baffle 53, it is possible to reduce the power requirement when the fan 3 is reversed as much as possible while ensuring the requirements of the dry and wind force, thereby avoiding the need for excessive speed when the fan 3 is reversed, thereby avoiding the fan 3 The oil stains on the fan blades are splashed when reversed.

In some embodiments of the present application, a communication module may also be built in the controller 6, and the controller 6 may establish a communication connection with the user's terminal through the communication module to send the operating state and prompt information of the range hood to The user terminal enables the user to select the corresponding operation strategy according to the operation state. For example, after the cooking is completed, the user does not clean the pot 4, the controller 6 sends a prompt instruction to the user terminal to remind the user to clean the pot, and after the user cleans the pot 4, the air flow is blown to the pot 4 to promote The remaining water on the pan 4 evaporates.

As can be seen from the above technical solutions, the waterproof residual range hood provided in this application, during normal cooking, the controller 6 controls the fan 3 to rotate forward, so that the air flow in the exhaust duct 2 is generated to the outdoor, and the absorption cooker 4 is generated. Fume. After cleaning the pot 4, the controller 6 first controls the electric shutters 23 to close to block the smoking port 21. Then, the fan 3 is controlled to reverse, so that the air in the smoke exhaust duct 2 flows into the room, and the air passes through the air duct 5 to blow the air flow from the air outlet 51 to the pot 4 to accelerate the evaporation of the remaining moisture in the pot 4. The waterproof residual range hood provided by this application, by adding a blower duct 5 connected to the smoke exhaust duct 2 and using the fan 3 to reverse, the range hood can blow the airflow to the pot 4 to make the residual water on the pot 4 fast Evaporate to keep the pots dry, so as to avoid the rusting of the pots 4 due to residual moisture, and solve the problem that the traditional pots have residual moisture after cleaning, making the pots 4 easy to rust.

Claims

A waterproof residual range hood, including a casing, a smoke exhaust pipe and a fan, the fan is provided on the smoke exhaust pipe to form an air flow in the smoke exhaust pipe, and one end of the smoke exhaust pipe is provided with smoking Mouth, the other end is provided with a smoke exhaust port, the smoking port and the smoke exhaust port are provided on the housing, the smoking port is located above the pot to absorb the oil smoke generated by the pot; The position of the smoking port is also provided with an electric shutter that can block the smoking port, and the range hood further includes a blowing duct and a controller;

The blower duct communicates with the smoke exhaust duct above the electric shutter, the blower duct extends from the smoke exhaust duct to a blower outlet, the blower outlet is provided at the bottom of the housing, and is placed near the pot Position; the controller is connected to the fan and the electric shutter, respectively, to control the electric shutter to block the smoking port, and to control the reverse operation of the fan, through the blowing duct to the pot airflow.
The range hood according to claim 1, characterized in that the range hood further includes an air intake duct, and a first valve that can block the smoke exhaust port is provided in the smoke exhaust port, and the inlet The air duct is located between the first valve and the fan, and communicates with the smoke exhaust duct;

A second valve that can block the intake pipe is provided on the intake pipe; the first valve and the second valve are connected to the controller.
The range hood according to claim 1, wherein a heater is further provided on the blowing duct, and the heater is connected to the controller to activate the heater when the fan is reversed , Heating the airflow in the blowing duct.
The range hood according to claim 1, wherein a temperature sensor is provided at the bottom of the casing to detect the temperature of the pot; the temperature sensor is connected to the controller to enable the controller According to the temperature detected by the temperature sensor, the timing of reversing the fan is controlled.
The range hood according to claim 1, wherein the electric shutter includes a motor, a transmission mechanism, and a blade; a plurality of the blades are connected to the motor through the transmission mechanism, and the motor is connected to the controller .
The range hood according to claim 5, characterized in that the transmission mode of the transmission mechanism is a chain transmission, one end of the blade is provided with a sprocket, the transmission mechanism includes a chain, and the output end of the motor is provided There is a sprocket, and the sprocket on the motor is connected to the sprockets on a plurality of blades through a chain to drive the blades to rotate when the motor rotates.
The range hood according to claim 1, characterized in that at least two electric baffles are provided at the position of the blower port, and the electric baffles are connected to the controller to control the electric The opening and closing angle of the baffle.