Range hood and air supply control method thereof

Abstract

The present invention discloses a range hood and an air supply control method thereof, wherein the range hood comprises a first air inlet assembly and a fan system, and the range hood further comprises: a second air inlet assembly, wherein the first air inlet assembly is used to be arranged in a first space indoors, the first space being a kitchen, and the second air inlet assembly is used to be arranged in a second space indoors that is isolated from the first space; the fan system is placed outside the first air inlet assembly and the second air inlet assembly, and the first air inlet assembly and the second air inlet assembly share the fan system as a power source; and an air supply module is capable of delivering the air sucked in by the second air inlet assembly into the first space. Compared with the prior art, the advantages of the present invention are: by arranging range hood assemblies in different spaces, airflow is supplemented during negative pressure suction in the kitchen, and the occurrence of negative pressure vacuuming and the like is reduced; the low temperature of other indoor spaces can be used to deliver coolness to the kitchen, thereby improving the temperature comfort experience.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a range hood and an air supply control method of the range hood. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics. A centrifugal fan installed inside the range hood absorbs and exhausts oil smoke, and uses a filter to filter out some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, negative pressure suction is generated at the center of the fan, sucking the oil smoke under the range hood into the fan. After being accelerated by the fan, it is collected by the volute and guided to be discharged outdoors.

[0003] On the one hand, many users are in the habit of closing the kitchen doors and windows when using the range hood. When the doors and windows are closed, it is easy for the kitchen to be vacuumed, which leads to increased inlet resistance and the indoor unit flow rate cannot reach the target flow rate, making it difficult to open the doors and windows. On the other hand, many users feel hot in the kitchen in summer, while the kitchen air conditioner and ceiling fan generally blow air from the top and circulate internally, which can easily interfere with the flow field and cause poor fume extraction effect and cold back of the head. It is also easy for the kitchen air conditioner and ceiling fan fan blades to be polluted by the circulating fume air. After using for a period of time, they are difficult to clean and have odor, affecting the experience, and thus affecting user experience and reputation. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a range hood in view of the deficiencies of the above-mentioned prior art, which can reduce the negative pressure vacuuming in the kitchen and can also use the low temperature of other indoor spaces to supply cold air to the kitchen, thereby improving the user experience.

[0005] The second technical problem to be solved by the present invention is to provide an air supply control method using the above range hood.

[0006] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a range hood, comprising a first air inlet assembly and a fan system, characterized in that: the range hood further comprises:

[0007] a second air inlet assembly, wherein the first air inlet assembly is used to be arranged in a first space indoors, the first space being a kitchen, and the second air inlet assembly is used to be arranged in a second space indoors that is isolated from the first space; the fan system is placed outside the first air inlet assembly and the second air inlet assembly, and the first air inlet assembly and the second air inlet assembly share the fan system as a power source;

[0008] The air supply module can deliver the air sucked in by the second air inlet assembly into the first space.

[0009] Preferably, in order to reduce noise, the fan system is used to be arranged in the ceiling of the first space, the fan system is connected to the first air inlet assembly through a first pipe and is fluidically connected, the fan system is connected to the second air inlet assembly through a second pipe and is fluidically connected, the air supply module is connected to the second pipe through a third pipe and is fluidically connected, and the position where the second pipe is connected to the third pipe is located between the fan system and the second air inlet assembly.

[0010] In order to avoid odor transfer between different spaces, a first one-way valve is provided in the first pipe, and a second one-way valve is provided in the second pipe, so that the airflow in each pipe flows from the corresponding air inlet assembly to the fan system;

[0011] A third one-way valve is arranged in the third pipeline. On the gas flow path, the second one-way valve is located downstream of the connection between the second pipeline and the third pipeline, thereby enabling the flow direction of the airflow sucked in by the second air inlet assembly to be switched between the fan system and the air supply module.

[0012] Preferably, the air supply module includes a shell and a nozzle, the shell is hollow to form a pressure equalizing chamber, and the pressure equalizing chamber is fluidly connected to the second air inlet assembly; an air supply port is opened on the bottom surface of the shell, and the air supply port is fluidly connected to the first space, and a nozzle is arranged at a position corresponding to the air supply port in the shell, and the nozzle sprays the gas in the pressure equalizing chamber toward the air supply port.

[0013] In order to make the air supply range larger, the nozzle is a Laval nozzle, and a vortex generating member is arranged between the nozzle outlet and the air supply port, and the vortex generating member is a blunt body.

[0014] The technical solution adopted by the present invention to solve the above second technical problem is: an air supply control method using the range hood as described above, wherein a first temperature sensor is provided on the first air inlet assembly of the range hood, and a second temperature sensor is provided on the second air inlet assembly; the feature is that: the range hood further comprises a first door and window sensor provided on the door of the first space and a second door and window sensor provided on the window of the first space; the air supply control method comprises the following steps:

[0015] 1) The first air inlet component is started;

[0016] 2) The first one-way valve is opened, the second one-way valve and the third one-way valve are closed, and the fan system operates at a default gear position;

[0017] 3) Read the information of each sensor, the current reading of the first temperature sensor is T1, the current reading of the second temperature sensor is T2, and determine whether T1>Ta and T1-T2>Tb are established. If yes, proceed to step 4), if not, proceed to step 5); wherein Ta is a preset kitchen reference temperature, and Tb is a preset temperature difference reference value;

[0018] 4) judging the opening and closing status of the corresponding doors or windows according to the first door and window sensor and the second door and window sensor, and performing corresponding operations so that the first component can normally take in air, and then returning to step 2);

[0019] 5) According to the first door and window sensor and the second door and window sensor, the two door and window sensors determine the opening and closing status of the corresponding doors or windows, and perform corresponding operations to make the first component take in air normally, and then return to step 2).

[0020] Preferably, in step 4), the following operations are included:

[0021] 4.1) If both are closed, open the third one-way valve and return to step 2);

[0022] 4.2) If one of the door and window is open, ensure that the window is closed and the door is open, and then return to step 2);

[0023] 4.3) If both the door and window are open, close the window and return to step 2);

[0024] Preferably, in step 5), the following operations are included:

[0025] 5.1) If both are closed, open the window and the third one-way valve, and then return to step 2);

[0026] 5.2) If one of the door and window is open, maintain the current state and return to step 2);

[0027] 5.3) If both the door and window are open, close the door or window and return to step 2).

[0028] Compared with the prior art, the advantages of the present invention are: by arranging range hoods in different spaces, and these range hoods share an external fan system, the channel space of the range hoods can be reduced, and the airflow can be supplemented during negative pressure suction in the kitchen to reduce the occurrence of negative pressure vacuuming and the like; the low temperature of other indoor spaces can be used to cool the kitchen, thereby improving the temperature comfort experience; the fan system can be installed at the height of the ceiling space to reduce noise; by arranging a one-way valve on the connected pipes, the odor can be prevented from flowing into the kitchen, the dining room and other spaces, thereby improving the user experience; by arranging a one-way filter, the odor can be further prevented from flowing into the kitchen, the dining room and other spaces, thereby improving the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A top view of the range hood in the installation state according to an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the connection between a range hood and a public flue according to an embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of an air supply module of a range hood according to an embodiment of the present invention;

[0032] Figure 4 is a cross-sectional view of an air supply module of a range hood according to an embodiment of the present invention;

[0033] Figure 5 for Figure 4 A schematic diagram of the partial enlargement of Ⅰ;

[0034] Figure 6 This is a flow chart of the air supply control method according to an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the flow state simulation when the incoming flow encounters a cylindrical object to form a Karman vortex street. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0038] See also Figure 1 and Figure 2A range hood comprises a first air inlet assembly 11 and a second air inlet assembly 12, which are respectively arranged in different spaces isolated from each other in the room. The first air inlet assembly 11 is arranged in a first space Q1 in the room, and the second air inlet assembly 12 is arranged in a second space Q2 in the room. The first space Q1 is a kitchen. The second air inlet assembly 12 can be one, arranged in a restaurant or other areas where oil fume needs to be extracted or other clean areas, or can be at least two, distributed in the restaurant and other areas where oil fume needs to be extracted, that is, the second space Q2 is a restaurant or other areas where oil fume needs to be extracted or other clean areas.

[0039] Each air inlet assembly can be a common smoke hood or a box with an air inlet, as long as it can capture oil smoke or other air. That is, compared with a conventional range hood, it only lacks a fan system.

[0040] The range hood further includes a fan system 2, which is disposed in the ceiling 100 of the first space Q1. The fan system 2 is connected to the first air inlet assembly 11 through a first pipe 21 and is in fluid communication. A first check valve 22 is disposed in the first pipe 21. The fan system 2 is connected to the second air inlet assembly 12 through a second pipe 24 and is in fluid communication. A second check valve 25 is disposed in the second pipe 24. The fumes exhausted by the fan system 2 flow into the common flue 200.

[0041] Each of them can be a solenoid valve, so that the fan system 2 and each one-way valve can be controlled in a wired or wireless manner in conjunction with the user operation panel. The first one-way valve 22 and the second one-way valve 25 allow the air containing oil smoke to flow from each air inlet component to the fan system in one direction, that is, the air is sucked from each air inlet component into the fan system 2 and then discharged from the public flue 200, but cannot flow back from the public flue 200 into each air inlet component.

[0042] The range hood further includes an air supply module 3, which is also arranged in the ceiling 100, preferably near the corner. The range hood further includes a third duct 26, which is connected between the air supply module 3 and the second duct 24, and the position of the second duct 24 connected to the third duct 26 is located between the fan system 2 and the second air inlet assembly 12, so that the air supply module 3 and the second duct 24 are fluidically connected. A third one-way valve 27 is arranged in the third duct 26. On the gas flow path, the second one-way valve 25 is located downstream of the connection between the second duct 24 and the third duct 26. The second duct 24 can switch the second air inlet assembly 12 to the fan system 2 or the air supply module 3 through the second one-way valve 25 and the third one-way valve 27.

[0043] The first air inlet assembly 11 is provided with a first temperature sensor 41, and the second air inlet assembly 12 is provided with a second temperature sensor 42. When the kitchen is closed or the kitchen is hot in summer, the temperature sensors can be used to judge and switch the one-way valves to supplement the kitchen airflow, reduce the negative pressure vacuuming, etc., and use the low temperature of the restaurant to cool the kitchen, reduce noise and improve the temperature comfort experience.

[0044] The first space Q1 is provided with a door 101 and a window 102 at its periphery, the door 101 is provided with a first door and window sensor A, and the window 102 is provided with a second door and window sensor B. The two door and window sensors may also be linked with the operation panel of the range hood via wired or wireless communication.

[0045] See also Figure 3 to Figure 5 The air supply module 3 includes a shell 31, a nozzle 32 and a vortex generating element 33. The shell 31 is connected to the third pipe 26. The shell 31 is hollow to form a pressure equalizing chamber Q. The pressure equalizing chamber Q is in fluid communication with the third pipe 26. An air supply port 311 is provided on the bottom surface of the shell 31, and the air supply port 311 is in fluid communication with the first space Q1. A nozzle 32 is provided at a position corresponding to the air supply port 311 in the shell 31, and the nozzle 32 sprays the gas in the pressure equalizing chamber Q to the air supply port 311. The nozzle 32 adopts a Laval nozzle, that is, when the gas flows, the cross-section is first small and then large. The above-mentioned vortex generating element 33 is provided between the outlet of the nozzle 32 and the air supply port 311. The vortex generating element 33 is a blunt body, such as a cylinder, a sphere or a bridge pier. In the present embodiment, it is preferably cylindrical. When the incoming flow passes through a cylindrical object, the flow state of the Karman vortex street vortex is generated. See. Figure 7 The vortex generating member 33 extends in the lateral direction (horizontally or nearly horizontally), which is consistent with the length direction of the outlet of the nozzle 32 and the air supply port 311. Thus, through the above-mentioned pressure equalization chamber Q, Laval nozzle and vortex generating member 33, the blown air supply airflow is in a flow state similar to the Karman vortex street, forming a periodic automatic vortex, thereby reducing the impact on the cooking area and delivering the restaurant cold air to a wider range.

[0046] This method of delivering cold air or replenishing air into the kitchen does not require additional holes and does not affect the existing decoration. Only one air inlet of the second air inlet component 12 is exposed in the second space. The first air inlet component 12 can absorb oil smoke through the fan system 2 and also replenish air or cold air to the kitchen.

[0047] See also Figure 6 , the air supply control method of the range hood of the present invention is described by taking the second space Q2 as a restaurant as an example, and includes the following steps:

[0048] 1) The first air inlet assembly 11 is started;

[0049] 2) The first one-way valve 22 is opened, the second one-way valve 25 and the third one-way valve 27 are closed, and the fan system 2 operates at a default gear position; the default gear position here can be the gear position at the last shutdown, or can be the same gear position at each startup;

[0050] 3) Read the information of each sensor, including the first temperature sensor 41, the second temperature sensor 42, the first door and window sensor A, and the second door and window sensor B (when there is more than one door 101 or window 102, the number of door and window sensors increases accordingly); the current temperature of the first temperature sensor 41 is T1, and the current temperature of the second temperature sensor 42 is T2, and determine whether T1>Ta and T1-T2>Tb are established. If yes, proceed to step 4), if not, proceed to step 5); wherein Ta is a preset kitchen reference temperature, such as 26°C. If it exceeds this reference value, it means that the current kitchen is in a hot mode. Tb is a preset temperature difference reference value, such as 5°C. If it is satisfied, it means that the temperature difference between the kitchen and the restaurant is large enough, and it can be judged that the restaurant has turned on the air conditioner. Therefore, when the above two expressions are both true, it means that the kitchen is currently in a hot mode and the restaurant has turned on the air conditioner to cool down. When one or none of the above expressions is satisfied, it means that the kitchen is not hot enough and / or the temperature difference between the kitchen and the restaurant is not enough. After screening based on this judgment condition, the subsequent door and window sensor status judgment can not only more intelligently predict the user's current scene through temperature, improve the accuracy of scene recognition, but also save chip computing power, improve decision-making efficiency, and improve response speed;

[0051] 4) Determine the opening and closing status of the corresponding door 101 or window 102 by using two door and window sensors. The conditional judgment of the door and window sensors in this step can further improve the current user scene coverage and recognition accuracy, and prepare for the next step of performing actions such as air replenishment or lifting and closing doors and windows:

[0052] 4.1) If they are all closed, it can be determined that the kitchen is in a closed environment and there is a possibility of negative pressure. Because the temperature of the restaurant is relatively low at this time, the third one-way valve 27 is opened, and the air from the second air inlet assembly 12 of the restaurant is used to supplement the kitchen air and blow cold air. This can not only replenish air, but also reduce the kitchen temperature, improve user comfort, and avoid the possibility of reduced oxygen content in the kitchen, reduced combustion efficiency of the stove, and even danger. Because the outside temperature may be higher than that of the kitchen, it is not recommended to open the window to replenish air at this time, and then return to step 2);

[0053] 4.2) If one of the door 101 and the window 102 is open, the air intake can be normally supplemented, and it is further determined whether the door 101 is open or the window 102 is open. If the condition that the door 101 is open does not affect the fume extraction and air supplementation, it is only necessary to maintain the current state. If the window 102 is open and the door 101 is not open, it is prompted to close the window 102 and open the door 101, and then return to step 2);

[0054] 4.3) If both the door 101 and the window 102 are open, it is easy for door-window convection to occur, which can interfere with the fume extraction and cause the convection to cause the fume to escape. Therefore, it is necessary to remind the user to close the window 102 to reduce the convection and use the door 101 to directly supply air and cool down, which can reduce the convection and improve the user comfort. Then, go back to step 2);

[0055] 5) At this time, if the kitchen is not hot enough or the temperature difference between the kitchen and the dining room is not enough, the two door and window sensors are used to determine the opening and closing status of the corresponding door 101 or window 102. The conditional judgment of the door and window sensors in this step can further improve the current user scene coverage and recognition accuracy, and prepare for the next step of performing actions such as replenishing air or lifting and closing doors and windows:

[0056] 5.1) If both are closed, it can be determined that the kitchen is a closed environment and there is a possibility of negative pressure. If the prompt to open the window to replenish air and the third one-way valve 27 are not opened, the oil smoke cannot be inhaled and visible cooking smoke will appear after a while. If it continues, the oxygen content in the kitchen may decrease, the combustion efficiency of the stove may decrease, and even danger may occur. Therefore, it is prompted to open the window 102 to replenish air and open the third one-way valve 27 (borrowing air from the restaurant) to avoid the above-mentioned smoke leakage and dangerous situation. Then the window 102 is prompted to replenish air, and then return to step 2);

[0057] 5.2) If one of the door 101 and the window 102 is open, the air intake can be replenished normally. This condition does not affect the fume extraction and air replenishment. It only needs to maintain the current state and then return to step 2);

[0058] 5.3) If both the door 101 and the window 102 are open, convection between the door and the window may easily occur, which may interfere with the suction of oil fumes and cause convection to cause smoke leakage. Therefore, it is necessary to remind the user to close the door 101 or the window 102 to reduce the interference of convection on the first air inlet component 11, and then return to step 2).

[0059] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A range hood, comprising a first air inlet assembly (11) and a fan system (2), characterized in that: The range hood further comprises: a second air inlet assembly (12), wherein the first air inlet assembly (11) is used to be arranged in a first space (Q1) indoors, the first space (Q1) being a kitchen, and the second air inlet assembly (12) is used to be arranged in a second space (Q2) indoors that is isolated from the first space (Q1); the fan system (2) is arranged outside the first air inlet assembly (11) and the second air inlet assembly (12), and the first air inlet assembly (11) and the second air inlet assembly (12) share the fan system (2) as a power source; An air supply module (3) capable of delivering air sucked in by the second air inlet assembly (12) into the first space (Q1); The fan system (2) is used to be arranged in the suspended ceiling (100) of the first space (Q1); the fan system (2) is connected to the first air inlet assembly (11) through a first pipe (21) and is in fluid communication with the first air inlet assembly (11); the fan system (2) is connected to the second air inlet assembly (12) through a second pipe (24) and is in fluid communication with the second air inlet assembly (12); the air supply module (3) is connected to the second pipe (24) through a third pipe (26) and is in fluid communication with the second pipe (24); the position where the second pipe (24) is connected to the third pipe (26) is located between the fan system (2) and the second air inlet assembly (12); A first one-way valve (22) is arranged in the first pipeline (21), and a second one-way valve (25) is arranged in the second pipeline (24), so that the airflow in each pipeline flows from the corresponding air inlet assembly to the fan system (2); A third one-way valve (27) is arranged in the third pipe (26), and on the gas flow path, the second one-way valve (25) is located downstream of the connection between the second pipe (24) and the third pipe (26), thereby enabling the flow direction of the airflow sucked in by the second air inlet assembly (12) to be switched between the fan system (2) and the air supply module (3).

2. The range hood according to claim 1, characterized in that: The air supply module (3) comprises a shell (31) and a nozzle (32); the shell (31) is hollow to form a pressure equalizing chamber (Q); the pressure equalizing chamber (Q) is fluidically connected to the second air inlet assembly (12); an air supply port (311) is provided on the bottom surface of the shell (31); the air supply port (311) is fluidically connected to the first space (Q1); a nozzle (32) is provided at a position in the shell (31) corresponding to the air supply port (311); the nozzle (32) sprays the gas in the pressure equalizing chamber (Q) toward the air supply port (311).

3. The range hood according to claim 2, characterized in that: The nozzle (32) is a Laval nozzle, and a vortex generating member (33) is provided between the outlet of the nozzle (32) and the air supply port (311), and the vortex generating member (33) is a blunt body.

4. A method for controlling air supply of a range hood using the range hood according to claim 1, wherein a first temperature sensor (41) is provided on a first air inlet assembly (11) of the range hood, and a second temperature sensor (42) is provided on a second air inlet assembly (12); characterized in that: The range hood further comprises a first door and window sensor (A) arranged on the door (101) of the first space (Q1) and a second door and window sensor (B) arranged on the window (102) of the first space (Q1); the air supply control method comprises the following steps: 1) The first air inlet component (11) is started; 2) the first one-way valve (22) is opened, the second one-way valve (25) and the third one-way valve (27) are closed, and the fan system (2) operates at a default gear position; 3) reading information from each sensor, the current reading of the first temperature sensor (41) is T1, the current reading of the second temperature sensor (42) is T2, judging whether T1>Ta and T1-T2>Tb are established, if yes, proceeding to step 4), if no, proceeding to step 5); wherein Ta is a preset kitchen reference temperature, and Tb is a preset temperature difference reference value; 4) judging the opening and closing status of the corresponding door (101) or window (102) by the first door and window sensor (A) and the second door and window sensor (B), and performing corresponding operations so that the first air intake assembly (11) can normally intake air, and then returning to step 2); 5) According to the first door and window sensor (A) and the second door and window sensor (B), the two door and window sensors determine the opening and closing status of the corresponding door (101) or window (102), and perform corresponding operations so that the first air intake component (11) can normally intake air, and then return to step 2).

5. The air supply control method according to claim 4, characterized in that: In step 4), the following operations are included: 4.1) If both are closed, open the third one-way valve (27) and return to step 2); 4.2) If one of the door (101) and the window (102) is open, ensure that the window (102) is closed and the door (101) is open, and then return to step 2); 4.3) If both the door (101) and the window (102) are open, close the window (102) and then return to step 2).

6. The air supply control method according to claim 4, characterized in that: In step 5), the following operations are included: 5.1) If both are closed, open the window (102) and the third one-way valve (27), and then return to step 2); 5.2) If one of the door (101) and the window (102) is open, maintain the current state and return to step 2); 5.3) If both the door (101) and the window (102) are open, close the door (101) or the window (102), and then return to step 2).

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