Range hood and control method and device thereof

Abstract

The invention discloses a range hood and a control method and device thereof. A smoke exhaust fan is arranged in a smoke exhaust cavity of the range hood, and a heat exhaust fan is arranged in a heat exhaust cavity of the range hood; the first communication control module is located between the smoke exhaust port and the smoke exhaust pipeline, and the second communication control module is located between the heat exhaust port and the heat exhaust pipeline. The control method of the range hood comprises the following steps: controlling on-off states of a first communication control module and a second communication control module according to current flue resistance and current pipeline resistance; when the first communication control module is in an open state and the second communication control module is in a closed state, the smoke exhaust port and / or the heat exhaust port are / is communicated with the smoke exhaust pipeline; when the first communication control module and the second communication control module are both in an open state, the smoke exhaust port and / or the heat exhaust port communicate with the smoke exhaust pipeline and the heat exhaust pipeline correspondingly. And when the first communication control module is in a closed state and the second communication control module is in an open state, the smoke exhaust port and / or the heat exhaust port are / is communicated with the heat exhaust pipeline.

Description

Technical Field

[0001] The present invention relates to the field of household appliance technology, and in particular to a range hood and its control method and device. Background Technology

[0002] In recent years, as people's demands for kitchen comfort have continued to increase, traditional range hoods have begun to integrate more functional modules. Among these, adding an air conditioning module has become an important development direction for improving the high-temperature environment in the kitchen. This type of integrated equipment can simultaneously extract fumes and cool the space during summer cooking, enhancing the overall cooking experience and gradually becoming an important development trend in smart kitchen appliances.

[0003] In existing technologies, some range hoods with integrated cooling functions typically employ a structure where smoke and heat exhaust share a common duct. In this structure, hot air can be exhausted outdoors through the range hood's smoke exhaust duct, thus simplifying the duct structure and saving installation space. However, because smoke and heat exhaust share a common duct, their exhaust paths cannot be completely independent. When the smoke emission volume is large or the heat exhaust is high, it can easily cause hot air backflow, smoke recirculation, or positive pressure conflict within the duct, leading to a decrease in cooling effect and reduced smoke extraction efficiency. Summary of the Invention

[0004] This invention provides a range hood and its control method and device, which are equipped with separate exhaust pipes and heat exhaust pipes to dynamically adjust the exhaust path and heat exhaust path based on the pipe resistance, thereby improving the exhaust efficiency and cooling performance of the range hood.

[0005] The first aspect of this invention provides a control method for a range hood, the range hood comprising an independent exhaust chamber and a heat exhaust chamber; the exhaust chamber is connected to an exhaust inlet and an exhaust outlet respectively, and an exhaust fan is provided in the exhaust chamber; the heat exhaust chamber is connected to a condenser air inlet and a heat exhaust outlet respectively, and at least a heat exhaust fan is provided in the heat exhaust chamber; the exhaust outlet and the heat exhaust outlet are both connected to an exhaust pipe and a heat exhaust pipe via connecting pipes; a first connection control module and a second connection control module are provided in the connecting pipes, the first connection control module being located between the exhaust outlet and the exhaust pipe, and the second connection control module being located between the heat exhaust outlet and the heat exhaust pipe; the control method for the range hood includes: When the range hood is started and running, the flue resistance of the exhaust pipe and the pipe resistance of the heat exhaust pipe are acquired in real time. Based on the current flue resistance and the current pipeline resistance, control the switching states of the first connection control module and the second connection control module; The first and second connection control modules each have an on / off state. When the first connection control module is on and the second connection control module is off, the exhaust port and / or the heat exhaust port are connected to the exhaust pipe but not to the heat exhaust pipe. When both the first and second connection control modules are on, the exhaust port and / or the heat exhaust port are connected to the exhaust pipe and the heat exhaust pipe, respectively. When the first connection control module is off and the second connection control module is on, the exhaust port and / or the heat exhaust port are connected to the heat exhaust pipe but not to the exhaust pipe.

[0006] A second aspect of the present invention provides a control device for a range hood, the range hood comprising an independent exhaust chamber and a heat exhaust chamber; the exhaust chamber is connected to an exhaust inlet and an exhaust outlet respectively, and an exhaust fan is disposed in the exhaust chamber; the heat exhaust chamber is connected to a condenser air inlet and a heat exhaust outlet respectively, and at least a heat exhaust fan is disposed in the heat exhaust chamber; the exhaust outlet and the heat exhaust outlet are both connected to an exhaust pipe and a heat exhaust pipe via connecting pipes; a first connection control module and a second connection control module are disposed in the connecting pipes, the first connection control module being located between the exhaust outlet and the exhaust pipe, and the second connection control module being located between the heat exhaust outlet and the heat exhaust pipe; the control device for the range hood includes: The resistance acquisition module is used to acquire the flue resistance of the exhaust pipe and the pipe resistance of the heat exhaust pipe in real time when the range hood is started and running. The first state control module is used to control the switching state of the first connection control module and the second connection control module according to the current flue resistance and the current pipe resistance. The first and second connection control modules each have an on / off state. When the first connection control module is on and the second connection control module is off, the exhaust port and / or the heat exhaust port are connected to the exhaust pipe but not to the heat exhaust pipe. When both the first and second connection control modules are on, the exhaust port and / or the heat exhaust port are connected to the exhaust pipe and the heat exhaust pipe, respectively. When the first connection control module is off and the second connection control module is on, the exhaust port and / or the heat exhaust port are connected to the heat exhaust pipe but not to the exhaust pipe.

[0007] A third aspect of the present invention provides a range hood, comprising: an independent smoke exhaust chamber and a heat exhaust chamber; The smoke exhaust chamber is connected to the smoke inlet and the smoke outlet respectively, and a smoke exhaust fan is installed in the smoke exhaust chamber; The heat exhaust chamber is connected to the condenser air inlet and the heat exhaust outlet respectively, and at least one heat exhaust fan is provided in the heat exhaust chamber; Both the flue gas outlet and the heat exhaust outlet are connected to the flue gas pipe and the heat exhaust pipe via connecting pipes; a first connection control module and a second connection control module are provided in the connecting pipes, the first connection control module is located between the flue gas outlet and the flue gas pipe, and the second connection control module is located between the heat exhaust outlet and the heat exhaust pipe; The range hood also includes a controller; the controller is connected to the first communication control module and the second communication control module respectively; the controller is used to execute the control method of the range hood as described above.

[0008] The technical solution of this invention, by setting a first connection control module and a second connection control module in the connecting pipe, and by acquiring the flue resistance of the exhaust pipe and the pipe resistance of the heat exhaust pipe in real time during the operation of the range hood, allows for the control of the on / off states of the first and second connection control modules based on the current flue resistance and pipe resistance, thereby dynamically adjusting the exhaust path and heat exhaust path. By controlling the emission path of fumes or heat, the range hood ensures high emission efficiency of fumes or heat, thus improving the exhaust efficiency and cooling performance of the range hood, and enhancing user comfort and intelligent experience. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural diagram of a range hood provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of a range hood provided in Embodiment 1 of the present invention; Figure 3 This is a structural block diagram of a range hood provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of another range hood provided in Embodiment 1 of the present invention; Figure 5 This is a structural block diagram of another range hood provided in Embodiment 1 of the present invention; Figure 6 This is a structural block diagram of another range hood provided in Embodiment 1 of the present invention; Figure 7 This is a partial three-dimensional structural diagram of a range hood provided in Embodiment 1 of the present invention; Figure 8 This is a partial three-dimensional structural schematic diagram of another range hood provided in Embodiment 1 of the present invention; Figure 9This is a schematic diagram of the cross-sectional structure of another range hood provided in Embodiment 1 of the present invention; Figure 10 This is a flowchart of a control method for a range hood provided in Embodiment 2 of the present invention; Figure 11 This is a flowchart of a control method for a range hood provided in Embodiment 3 of the present invention; Figure 12 This is a flowchart of a control method for a range hood provided in Embodiment 4 of the present invention; Figure 13 This is a schematic diagram of the cross-sectional structure of a range hood provided in Embodiment 4 of the present invention; Figure 14 This is a schematic diagram of the cross-sectional structure of another range hood provided in Embodiment 4 of the present invention; Figure 15 This is a schematic diagram of the cross-sectional structure of another range hood provided in Embodiment 4 of the present invention; Figure 16 This is a schematic diagram of the cross-sectional structure of another range hood provided in Embodiment 4 of the present invention; Figure 17 This is a schematic diagram of the cross-sectional structure of another range hood provided in Embodiment 4 of the present invention; Figure 18 This is a schematic diagram of the cross-sectional structure of another range hood provided in Embodiment 4 of the present invention; Figure 19 This is a flowchart of a control method for a range hood provided in Embodiment 5 of the present invention; Figure 20 This is a flowchart of a control method for a range hood provided in Embodiment Six of the present invention; Figure 21 This is a structural block diagram of a control device for a range hood provided in Embodiment 7 of the present invention. Detailed Implementation

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0011] The terminology used in the embodiments of this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. It should be noted that directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this invention are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this invention. Furthermore, in the context, it should be understood that when referring to an element being formed "on" or "below" another element, it can be formed not only directly on or below the other element, but also indirectly on or below it through intermediate elements. The terms "first," "second," etc., are used for descriptive purposes only and do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0012] The term "comprising" and its variations as used in this invention are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment".

[0013] It should be noted that the concepts of "first" and "second" mentioned in this invention are only used to distinguish the corresponding contents and are not used to limit the order or interdependence.

[0014] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0015] Example 1 Figure 1 This is a three-dimensional structural diagram of a range hood provided in Embodiment 1 of the present invention. Figure 2 This is a cross-sectional structural diagram of a range hood provided in Embodiment 1 of the present invention, for reference. Figure 1 and Figure 2 The range hood provided in this embodiment of the invention includes at least: a smoke exhaust chamber A1 and a heat exhaust chamber A2 arranged in a horizontal direction X and independent of each other; the smoke exhaust chamber A1 is connected to the smoke inlet B1 and the smoke exhaust outlet B2 respectively, and a smoke exhaust fan 10 is provided in the smoke exhaust chamber A1; the heat exhaust chamber A2 is connected to the condenser air inlet B3 and the heat exhaust outlet B4 respectively, and at least a heat exhaust fan 20 is provided in the heat exhaust chamber A2.

[0016] The exhaust chamber A1 is connected to the smoke inlet B1 and the exhaust outlet B2, allowing fumes to enter the exhaust chamber A1 through the smoke inlet B1 and be discharged through the exhaust outlet B2 of the exhaust fan 10 installed in the exhaust chamber A1. The heat exhaust chamber A2 is connected to the condenser air inlet B3 and the heat exhaust outlet B4, allowing air from the environment where the range hood is located to enter the heat exhaust chamber A2 through the condenser air inlet B3 and be discharged through the heat exhaust outlet B4 of the heat exhaust fan 20 installed in the heat exhaust chamber A2. Meanwhile, a condenser 21 can also be installed in the heat exhaust chamber A2. The condenser 21 can exchange heat with the air entering through the condenser air inlet B3, so that the air temperature is raised and the heated air can carry the heat of the environment where the range hood is located. The condenser 21 can be located between the condenser air inlet B3 and the air inlet of the heat exhaust fan 20, so that when the heat exhaust fan 20 is started, it can generate a directional negative pressure airflow, accelerate the air flow speed on the surface of the condenser, quickly exhaust the heat, and achieve rapid cooling.

[0017] Understandably, since the core task of the exhaust fan 10 is to extract and exhaust high-temperature cooking fumes, which are a mixture of oil mist, water vapor, and cooking particles, and are highly viscous and dense, the requirements for the fan's air pressure and air volume are higher. In contrast, the heat exhaust fan 20 is only responsible for exhausting clean hot air emitted from the condenser 21. This airflow is non-viscous, contains fewer impurities, and flows only through the fins of the condenser 21 and the heat exhaust duct, resulting in resistance far less than that of exhaust fumes. Therefore, the exhaust fan 10 needs to have a stronger driving capability, which can be achieved by setting its rated power to be greater than that of the heat exhaust fan 20. Simultaneously, since the driving capability of a fan is related to its motor, fans with greater driving capability typically require larger motors. Therefore, by setting the heat exhaust fan 20 to have a smaller driving capability, a large motor is not required in the heat exhaust fan 20, thus meeting the requirements of high integration and miniaturization while ensuring the normal operation of the range hood.

[0018] In addition, the range hood may also include a cooling chamber A3, which may contain an evaporator 31, a circulating fan 32, and a compressor 33. The cooling chamber A3 is connected to both the return air vent B5 and the supply air vent B6. Gas entering through the return air vent B5 undergoes heat exchange with the refrigerant in the evaporator 31 before entering the circulating fan 32. The circulating fan 32 then delivers the gas to the environment where the range hood is located through the supply air vent B6 to rapidly cool the surrounding environment. The refrigerant outlet of the evaporator 31 can be connected to the refrigerant inlet of the compressor 33, and vice versa. After the evaporator 31 performs heat exchange by vaporizing the refrigerant, the vaporized refrigerant can be sent to the compressor 33. The compressor 33 then performs work to convert the compressed vaporized refrigerant into a high-temperature, high-pressure refrigerant, which condenses into liquid refrigerant and is then returned to the evaporator to achieve refrigerant circulation.

[0019] In other optional embodiments, the range hood may also include an air purification chamber, which may be equipped with a fresh air fan, an air purifier, etc. The air purification chamber may be connected to an air inlet and an air outlet respectively. The fresh air fan in the air purification chamber generates negative pressure when it rotates, so that the air from the outside environment enters the air purification chamber through the air inlet, is filtered and purified by the air purifier in the air purification chamber, and is discharged into the space where the range hood is located through the air outlet, thereby realizing ventilation and air purification in the space.

[0020] Figure 3 This is a structural block diagram of a range hood provided in Embodiment 1 of the present invention, in conjunction with reference to... Figures 1 to 3 Both the smoke exhaust port B2 and the heat exhaust port B4 are connected to the smoke exhaust pipe C2 and the heat exhaust pipe C3 via connecting pipe C1. A first connection control module 41 and a second connection control module 42 are installed in connecting pipe C1. The first connection control module 41 is located between the smoke exhaust port B2 and the smoke exhaust pipe C2, and the second connection control module 42 is located between the heat exhaust port B4 and the heat exhaust pipe C3. The range hood also includes a controller 01; the controller 01 is connected to both the first connection control module 41 and the second connection control module 42; the controller 01 is also used to control the on / off states of the first connection control module 41 and the second connection control module 42.

[0021] The controller 01 is connected to the first communication control module 41 and the second communication control module 42 respectively. The connection method can include, but is not limited to, communication connection and electrical connection by wire. The specific design can be made according to actual needs, and the embodiment of the present invention does not limit it in this way. The controller 01 can obtain the flue resistance of the flue and the pipe resistance of the heat exhaust pipe in real time, so as to control the on / off state of the first communication control module 41 and the second communication control module 42 according to the current flue resistance and the current pipe resistance.

[0022] The exhaust port B2 is connected to the exhaust duct C2 via connecting pipe C1, allowing the fumes or heat discharged by the exhaust fan 10 to be discharged into the exhaust duct C2 through connecting pipe C1. The exhaust port B2 can also be connected to the heat exhaust duct C3 via connecting pipe C1. A second connection control module 42 is installed in connecting pipe C1, allowing the second connection control module 42 to control whether the exhaust port B2 is connected to the heat exhaust duct C3. Simultaneously, the heat exhaust port B4 is connected to the heat exhaust duct C3, allowing the heat discharged by the heat exhaust fan 20 to be discharged outdoors through the heat exhaust duct C3. Thus, by controlling the states of the first connection control module 41 and the second connection control module 42, the path for exhausting fumes and / or heat can be selected, allowing the exhaust path to meet diverse requirements.

[0023] In an exemplary embodiment, both the first communication control module 41 and the second communication control module 42 may include an electric valve, and the path of heat dissipation and oil fume exhaust can be controlled by controlling the opening and closing of the electric valve.

[0024] In an optional embodiment, when the controller 01 determines that the current flue resistance and the current pipe resistance are both outside the preset resistance range, and / or the current flue resistance and the current pipe resistance are equal, the first connection control module 41 and the second connection control module 42 can be controlled to be in the open state. At this time, the exhaust port B2 can be connected to the heat exhaust pipe C3, so that the oil fumes or heat discharged by the exhaust fan 10 can be discharged into the exhaust pipe C2 and the heat exhaust pipe C3 respectively, thereby achieving efficient discharge of oil fumes or heat. The heat exhaust port B4 can be connected to the exhaust pipe C2, so that the heat discharged by the heat exhaust fan 20 can be discharged through the exhaust pipe C2 and the heat exhaust pipe C3 respectively. When the controller 01 determines that at least one of the current flue resistance and the current pipe resistance is within the preset resistance range, if the current pipe resistance is greater than the current flue resistance, it means that the resistance of the heat exhaust pipe C3 is greater than the resistance of the smoke exhaust pipe C2. The first connection control module 41 can be controlled to be in the open state and the second connection control module 42 can be controlled to be in the closed state, so that the smoke exhaust port B2 and the heat exhaust port B4 are isolated from the heat exhaust pipe C3. The oil fumes or heat discharged by the smoke exhaust fan 10 and the heat discharged by the heat exhaust fan 20 can be discharged to the smoke exhaust pipe C2 through the connecting pipe C1. Furthermore, when the controller 01 determines that at least one of the current flue resistance and the current pipe resistance is within the preset resistance range, if the current flue resistance is greater than the current pipe resistance, it means that the resistance of the heat exhaust pipe C3 is less than the resistance of the flue gas exhaust pipe C2. The first connection control module 41 can be controlled to be in the closed state and the second connection control module 42 can be controlled to be in the open state, so that the flue gas outlet B2 and the heat exhaust outlet B4 are isolated from the flue gas exhaust pipe C2. The oil fumes or heat discharged by the flue gas exhaust fan 10 and the heat discharged by the heat exhaust fan 20 can be discharged to the heat exhaust pipe C3 through the connecting pipe C1. Thus, by setting both the smoke exhaust port B2 and the heat exhaust port B4 to be connected to the smoke exhaust pipe C2 and the heat exhaust pipe C3 via the connecting pipe C1, and by setting a first connection control module 41 between the smoke exhaust port B2 and the smoke exhaust pipe C2, and a second connection control module 42 between the heat exhaust port B4 and the heat exhaust pipe C3, the paths for exhausting fumes and heat by the smoke exhaust fan 10 and the heat exhaust fan 20 can be controlled, thereby achieving efficient exhaust of fumes and heat.

[0025] Correspondingly, to prevent backflow of fumes and heat, one-way valves can be installed at the exhaust port B2 and the heat exhaust port B4 respectively, so that the heat or fumes in the exhaust chamber A1 can only be discharged through the exhaust port B2, and the fumes or heat cannot enter the exhaust chamber A1 through the exhaust port B2; similarly, the heat in the heat exhaust chamber A2 can be discharged through the heat exhaust port B4, while the fumes or heat cannot enter the heat exhaust chamber A2 through the heat exhaust port B4.

[0026] It is understood that the exhaust duct can be a public exhaust duct, meaning that the range hood provided in this embodiment can be connected to other range hoods and / or range hoods in the same exhaust duct for the discharge of fumes and / or heat through the same exhaust duct. When the heat exhaust duct is only used for heat discharge, it can be a non-public, independent duct that can be directly connected to the outdoor environment through corresponding through-holes, allowing heat to be directly discharged outdoors. When the heat exhaust duct is used for both fume and heat discharge, it can also be a public heat exhaust duct. The specific details of the exhaust duct and heat exhaust duct can be designed according to actual needs, and this embodiment does not impose specific limitations on them.

[0027] Based on the above embodiments, optionally, Figure 4 This is a cross-sectional structural diagram of another range hood provided in Embodiment 1 of the present invention. Figure 5 This is a structural block diagram of another range hood provided in Embodiment 1 of the present invention, for reference. Figure 4 and Figure 5 A third connection control module 43 is also provided in the connecting pipe C1; the third connection control module 43 is located between the heat exhaust port B2 and the smoke exhaust port B4; the controller 01 is also connected to the third connection control module 43; the controller 01 is also used to control the on / off state of the third connection control module 43 according to the operating status of the smoke exhaust fan 10 and the heat exhaust fan 20.

[0028] The switching states of the first connection control module 41, the second connection control module 42, and the third connection control module 43 can include an on state and an off state. The controller 01 can control the switching states of the first connection control module 41, the second connection control module 42, and the third connection control module 43 independently. That is, the first connection control module 41, the second connection control module 42, and the third connection control module 43 can be turned on individually, or they can be turned on simultaneously. Specifically, the switching states of the first connection control module 41, the second connection control module 42, and the third connection control module 43 can be controlled according to actual needs.

[0029] When the third connection control module 43 is in the open state, the connecting pipe C1 between the first connection control module 41 and the second connection control module 42 is connected to the heat exhaust port B4 and the smoke exhaust port B2 respectively. The fumes or heat discharged by the smoke exhaust fan 10 can be discharged into the smoke exhaust pipe C2 and the heat exhaust pipe C3 respectively, or the heat discharged by the heat exhaust fan 20 can be discharged into the smoke exhaust pipe C2 and the heat exhaust pipe C3 respectively. When the third connection control module 43 is in the closed state, the connecting pipe between the smoke exhaust port B2 and the first connection control module 41 and the third connection control module 43 is connected, and the connecting pipe between the heat exhaust port B4 and the third connection control module 43 and the second connection control module 42 is connected. The fumes or heat discharged by the smoke exhaust fan 10 can be discharged into the smoke exhaust pipe C2, but cannot be discharged into the heat exhaust pipe C3. Similarly, the heat discharged by the heat exhaust fan 20 can only be discharged through the heat exhaust pipe C3. Thus, by setting the first connection control module 41, the second connection control module 42 and the third connection control module 43, the emission channels for oil fumes and heat can be controlled respectively to meet the requirements of efficient oil fume and heat removal.

[0030] In one exemplary embodiment, the third connectivity control module 43 may include an electric valve, which controls the path of heat dissipation and oil fume exhaust by controlling the opening and closing of the electric valve.

[0031] Optional, Figure 6 This is a structural block diagram of another range hood provided in Embodiment 1 of the present invention, for reference. Figure 4 and Figure 6 The range hood also includes: a fourth communication control module 44 disposed on the cavity wall between the smoke exhaust cavity A1 and the heat exhaust cavity A2; the controller 01 is also connected to the fourth communication control module 44; the controller 01 is also used to obtain the amount of oil smoke and the ambient temperature of the environment where the range hood is located in real time; and to control the on / off state of the fourth communication control module 44 according to the current amount of oil smoke and the current ambient temperature.

[0032] The smoke exhaust chamber A1 and the heat exhaust chamber A2 can be arranged horizontally along the X direction and are independent of each other. The smoke exhaust chamber A1 and the heat exhaust chamber A2 are isolated from each other by corresponding chamber walls, which can have openings. The fourth communication control module 44 can be located at these openings. When the fourth communication control module 44 is in the closed state, it covers the openings, preventing the smoke exhaust chamber A1 and the heat exhaust chamber A2 from communicating. When the fourth communication control module 44 is in the open state, the smoke exhaust chamber A1 communicates with the heat exhaust chamber A2 through the openings. Thus, by installing the fourth communication control module 44 on the chamber wall between the smoke exhaust chamber A1 and the heat exhaust chamber A2, the communication state between them can be controlled.

[0033] The controller 01 can acquire the amount of oil fumes and the ambient temperature of the environment where the range hood is located through the configured information acquisition module 02. The information acquisition module 02 may include a temperature sensor, such as an infrared temperature sensor. In this case, the information acquisition module 02 can determine the amount of oil fumes in the environment where the range hood is located by acquiring the ambient temperature. For example, it can determine the amount of oil fumes in the environment where the range hood is located based on the rate of change of the ambient temperature. That is, when the rate of change of the ambient temperature is high, it can be determined that the amount of oil fumes in the environment where the range hood is located is high, and when the rate of change of the ambient temperature is low, it can be determined that the amount of oil fumes in the environment where the range hood is located is low. Thus, the amount of oil fumes and the ambient temperature in the environment where the range hood is located can be determined based on the temperature acquired by the information acquisition module 02.

[0034] In an optional embodiment, when the controller 50 determines, based on the acquired amount of oil fumes and ambient temperature of the environment where the range hood is located, that the current amount of oil fumes in the environment is less than a first preset amount of oil fumes, and the ambient temperature is greater than a first preset temperature, that is, there is no oil fume or the amount of oil fumes in the environment where the range hood is located is small (negligible), the environment where the range hood is located does not need to exhaust oil fumes, but the ambient temperature is high and needs to be cooled quickly to reach a comfortable temperature, the first connection control module 41 can be controlled to open, so that the exhaust chamber A1 is connected to the heat exhaust chamber A2. At the same time, the exhaust fan 10 is controlled to start running, and a negative pressure is formed in the exhaust chamber A1. This causes the air entering the heat exhaust chamber A2 from the hot air inlet to be heated by heat exchange in the condenser 21, and then enters the exhaust chamber A1 through the opened first connection control module 41 and is discharged by the exhaust fan 10. Since the rated power of the exhaust fan 10 is greater than that of the heat exhaust fan 20, the exhaust fan 10 has a greater driving capacity, which allows the air carrying heat from the environment where the range hood is located to be quickly discharged through the exhaust fan 10, so that the temperature of the environment where the range hood is located can be quickly reduced to a suitable temperature. Thus, by replacing the heat exhaust fan with the exhaust fan 10, which has a higher performance, the exhaust fan 10 can achieve the function of removing heat, which is beneficial to improving the cooling effect.

[0035] Optionally, the range hood also includes a baffle plate installed at the smoke inlet B1; when the baffle plate is in the closed state, it covers the smoke inlet B1. Thus, when the current amount of cooking fumes in the environment where the range hood is located is less than a first preset amount, it can be determined that no fumes need to be emitted, and the baffle plate can be kept closed to prevent air entering the exhaust chamber A1 through the smoke inlet B1 from affecting the exhaust efficiency of air entering through the condenser air inlet B3 when the exhaust fan 10 is activated for heat dissipation. Conversely, when the current amount of cooking fumes in the environment where the range hood is located is greater than or equal to the first preset amount, it can be determined that fumes need to be emitted, and the baffle plate can be kept open, allowing the exhaust chamber A1 to connect with the environment where the range hood is located through the smoke inlet B1. Cooking fumes can then enter the exhaust chamber A1 through the smoke inlet B1 and be discharged by the exhaust fan 10, thus meeting the need for fume extraction. In addition, when the range hood is not running, the baffle can be kept closed to prevent backflow of fumes from the common exhaust duct.

[0036] In an optional embodiment, the fourth connection control module 44 can be a one-way valve pointing from the heat exhaust chamber A2 to the smoke exhaust chamber A1. That is, the fourth connection control module 44 has a one-way function. For example, when the gas pressure in the smoke exhaust chamber A1 is greater than that in the heat exhaust chamber A2, the fourth connection control module 44 is in a closed state to prevent gas in the smoke exhaust chamber A2 from flowing back into the heat exhaust chamber A2. Conversely, when the pressure in the smoke exhaust chamber A1 is less than other pressures in the heat exhaust chamber A2, the fourth connection control module 44 can be in an open state to quickly dissipate heat through the smoke exhaust fan 10, achieving rapid cooling. It is understood that, provided the fourth connection control module 44 can achieve one-way flow, the specific structure of the fourth connection control module 44 is not limited in this embodiment of the invention.

[0037] In an alternative embodiment, such as Figure 7 and Figure 8 As shown, when an opening is provided on the cavity wall between the smoke exhaust chamber A1 and the heat exhaust chamber A2, the fourth communication control module 44 may include a fixed base 441, at least one valve plate 442 movably connected to the fixed base 441, and a drive mechanism 443 connected to the valve plate 442; the drive mechanism 443 is fixed on the fixed base 441; the drive mechanism 443 drives the valve plate 442 to move, so as to control the on / off state of the fourth communication control module 44; wherein, when the fourth communication control module 44 is in the closed state, the valve plate 442 covers the opening.

[0038] The fourth communication control module 44 includes at least one valve plate 442, that is, the fourth communication control module 44 may include one, two or more valve plates 442, which can be designed according to actual needs; at the same time, since the valve plate 442 covers the opening when the fourth communication control module 44 is in the closed state, the shape of the valve plate 442 can be consistent with or inconsistent with the shape of the opening, which can also be designed according to actual needs, and the embodiments of the present invention do not make specific limitations in this regard.

[0039] In an optional embodiment, when the fourth communication control module 44 includes a valve plate 442, the valve plate 442 can be slidably or rotatably connected to the opening. The shape of the opening can be the same as the shape of the valve plate 442. For example, when the shape of the opening is circular, the shape of the valve plate 442 can also be circular, and when the shape of the opening is quadrilateral, the shape of the valve plate 442 can also be quadrilateral. The specific shape of the opening can be designed according to actual needs, and the embodiments of the present invention do not specifically limit it.

[0040] In another optional embodiment, when the fourth communication control module 44 includes two valve plates 442, the two valve plates 442 can be located simultaneously on the side of the opening close to the smoke exhaust chamber A1, and the two valve plates 442 can be rotatably or slidably connected to the opposite sides of the opening, so that when the fourth communication control module 44 is in the closed state, the combined shape of the two valve plates 442 can be consistent with the shape of the opening.

[0041] In other optional embodiments, the fourth communication control module 44 may also include three or more valve plates 442. The specific connection relationship and shape can also be designed according to actual needs, and the embodiments of the present invention do not impose specific limitations on this. For ease of description, unless otherwise specified, the embodiments of the present invention all take the first communication control module including two valve plates as an example to illustrate the technical solution of the embodiments of the present invention.

[0042] Continue to refer to Figure 7 and Figure 8 The drive mechanism 443 may include at least one drive motor that is configured to correspond one-to-one with at least one valve plate 442. That is, when the fourth communication control module 44 includes two valve plates 442, the drive mechanism 443 may include two drive motors, each drive motor being connected to each valve plate 442 to drive the valve plate 442 to open or close, thereby realizing the control of opening and closing of the fourth communication control module 44.

[0043] Optional, continue to refer to Figure 7 and Figure 8 The fourth communication control module 44 also includes a sealing structure 444; the sealing structure 444 is located on the side of the valve plate near the heat dissipation chamber A2, and the sealing structure 444 is arranged around the opening.

[0044] The sealing structure may include sealing gaskets such as silicone or rubber to ensure that it has both high-temperature resistance and sealing performance. By setting the sealing structure 444, an interference fit is formed between the valve plate 442 and the sealing structure 444. This prevents the high pressure in the exhaust chamber A1 from generating a large thrust on the valve plate 442 when the fourth communication control module 44 is in the closed state, thus preventing the oil fumes in the exhaust chamber A1 from entering the heat exhaust chamber A2. This also prevents the oil fumes from corroding the heat exhaust fan 20 and condenser 21 in the heat exhaust chamber A2, thereby affecting the heat exchange and cooling effect.

[0045] In an alternative embodiment, reference is made to... Figure 9 As shown, the cross-sectional area of ​​the opening on the cavity wall between the smoke exhaust chamber A1 and the heat exhaust chamber A2 is larger than the cross-sectional area of ​​the air inlet of the smoke exhaust fan 10. This arrangement allows air entering the heat exhaust chamber A2 to quickly enter the smoke exhaust chamber A1 and be quickly discharged by the smoke exhaust fan 10 in the smoke exhaust chamber A1, thereby improving the cooling effect.

[0046] Optionally, further reference can be made to the technology described in the above embodiments. Figure 4 The distance between the center line of the air inlet of the exhaust fan 10 and the condenser air inlet B3 in the vertical direction Y is the first distance d1; the distance between the center line of the air inlet of the exhaust fan 20 and the condenser air inlet B3 in the vertical direction Y is the second distance d2; the first distance d1 is less than the second distance d2; the vertical direction Y intersects the horizontal direction X.

[0047] The exhaust vents of both the exhaust fan 10 and the heat exhaust fan 20 can be connected to the same common connecting pipe C1, allowing the fumes and heat from the environment where the range hood is located to be discharged into the connecting pipe C1. When the fourth connection control module 44 is closed, and the exhaust chamber A1 and the heat exhaust chamber A2 are not connected, if the exhaust fan 10 and the heat exhaust fan 20 operate simultaneously, the exhaust fan 10 can discharge the fumes entering through the smoke inlet B1 into the exhaust pipe, and the heat exhaust fan 20 can discharge the air entering through the condenser inlet B3 after heat exchange and heating into the heat exhaust pipe. At this time, the transmission path of the fumes in the environment where the range hood is located (e.g., Figure 4 The middle path (M1) enters from the smoke inlet B1, passes through the exhaust fan 10, and then enters the exhaust duct C2; while the air transmission path of the environment where the range hood is located (such as...) Figure 4 The path M2 in the image enters through the condenser inlet B3, undergoes heat exchange in the condenser 21, and then enters the exhaust fan 20, from which it is discharged into the exhaust pipe C3. When the fourth connection control module 44 is in the active state, and the exhaust chamber A1 is connected to the exhaust chamber A2, the exhaust fan 10 operates independently to exhaust heat and cool the air. At this time, the air transmission path of the environment around the range hood (such as...) Figure 9The path M3 is from the condenser air inlet B3, after heat exchange in the condenser 21, it enters the exhaust chamber A1 through the opened fourth connection control module 44, and is discharged to the exhaust pipe by the exhaust fan 10 in the exhaust chamber A1.

[0048] Specifically, since the first distance d1 is smaller than the second distance d2, the center line of the air inlet of the exhaust fan 10 is located on the side of the center line of the air inlet of the heat exhaust fan 20 closer to its connection with the connecting pipe C1. The exhaust fan 10 is closer to the condenser 21, which makes the air transmission path shorter when heat is exhausted through the exhaust fan 10. Therefore, when using the exhaust fan 10 to exhaust heat, the air exhaust efficiency carrying the heat of the environment where the range hood is located can be further improved, thereby improving the cooling effect of the range hood.

[0049] It is understood that the controller in the range hood provided in the embodiments of the present invention can execute the control method of the range hood in any embodiment of the present invention. Therefore, the range hood provided in the embodiments of the present invention has the technical features of the control method of the range hood provided in any embodiment of the present invention, and can achieve the beneficial effects of the control method of the range hood provided in any embodiment of the present invention. The specific situation will be described in detail in the following embodiments, and will not be repeated here.

[0050] Example 2 Figure 10 This is a flowchart of a control method for a range hood provided in Embodiment 2 of the present invention. This embodiment is applicable to situations where the exhaust path and heat dissipation path are dynamically adjusted based on pipe resistance. This method can be executed by a control device for the range hood, which can be implemented in hardware and / or software. The control device can be configured in the controller of the range hood provided in this embodiment of the present invention. Figure 10 As shown, the control method for the range hood in this embodiment includes: S101. When the range hood is started and running, the resistance of the exhaust duct and the resistance of the heat exhaust duct are obtained in real time.

[0051] Among them, reference Figures 1 to 3 Both the smoke exhaust port B2 and the heat exhaust port B4 are connected to the smoke exhaust pipe C2 and the heat exhaust pipe C3 via connecting pipe C1. A first connection control module 41 and a second connection control module 42 are installed in the connecting pipe C1. The first connection control module 41 is located between the smoke exhaust port B2 and the smoke exhaust pipe C2, and the second connection control module 42 is located between the heat exhaust port B4 and the heat exhaust pipe C3. By controlling the on / off state of the first connection control module 41 and the second connection control module 42, the paths for exhausting fumes and heat from the smoke exhaust fan 10 and the heat exhaust fan 20 can be controlled.

[0052] It should be noted that, since the flue gas outlet and the heat exhaust outlet are connected to the flue gas pipe and the heat exhaust pipe respectively, when obtaining the pipe resistance of the flue gas pipe, the flue gas outlet can be connected to the flue gas pipe through the connecting pipe, that is, the first connection control module is controlled to be in the open state and the second connection control module is controlled to be in the closed state; when obtaining the pipe resistance of the heat exhaust pipe, the heat exhaust outlet can be connected to the heat exhaust pipe through the connecting pipe, that is, the second connection control module is controlled to be in the open state and the first connection control module is controlled to be in the closed state.

[0053] Since exhaust ducts are usually shared, meaning that multiple range hoods and / or range hoods are connected to the same exhaust duct, when multiple range hoods and / or range hoods are running simultaneously, there will be significant resistance within the exhaust duct. This resistance will create a reverse force from the exhaust duct to the range hood, thus affecting the rate at which fumes or heat are emitted. In this case, the magnitude of this reverse force can be determined by measuring the resistance within the exhaust duct.

[0054] Specifically, under a set operating power, the flue resistance of the exhaust fan is generally negatively correlated with the actual operating speed of the exhaust fan. That is, the higher the flue resistance, the higher the load on the exhaust fan, and the lower its actual operating speed; conversely, the lower the flue resistance, the lower the load on the exhaust fan, and the higher its actual operating speed. Therefore, based on the current operating power and actual operating speed of the exhaust fan, the flue resistance in the exhaust duct can be determined.

[0055] It is understood that the specific method for obtaining the flue resistance can be determined according to actual needs, and this embodiment of the invention does not impose specific limitations on it. In one optional embodiment, it can be obtained by a resistance detection sensor installed in the exhaust duct. In another optional embodiment, the flue resistance can be mapped to the actual speed and operating power of the exhaust fan using a formula or table, and stored in a corresponding memory. When it is necessary to obtain the flue resistance of the exhaust duct, the current operating power and current actual speed of the exhaust fan can be obtained, and the flue resistance of the exhaust duct can be determined by looking up a table or calculating a formula based on the current operating power and current actual speed, according to the mapping relationship.

[0056] In an exemplary embodiment, the mapping relationship between flue resistance and the actual speed and operating power of the exhaust fan can be obtained experimentally. For example, by controlling the exhaust fan to operate at a set operating power and controlling the exhaust duct to have different flue resistances, the actual operating speeds corresponding to different flue resistances are obtained for the same set operating power, thus forming the actual operating speeds corresponding to different flue resistances at the set operating power. Similarly, for the actual operating speeds corresponding to different flue resistances at each set operating power, the mapping relationship between flue resistance and operating power and actual operating speed can be determined. Specifically, different flue resistances can be achieved by controlling the number of range hoods and / or cooking hoods connected to the exhaust duct. For example, when the number of range hoods and / or cooking hoods connected to the exhaust duct is controlled to be 30% of the total number of range hoods and / or cooking hoods connected to the exhaust duct, the flue resistance in the exhaust duct can be the first flue resistance. When the number of range hoods and / or cooking hoods connected to the exhaust duct is controlled to be 50% of the total number of range hoods and / or cooking hoods connected to the exhaust duct, the flue resistance in the exhaust duct can be the second flue resistance, which is greater than the first flue resistance. Thus, the more range hoods and / or cooking hoods connected to the same exhaust duct that are in operation, the greater the flue resistance in the exhaust duct, thereby achieving control over the flue resistance in the exhaust duct.

[0057] Similarly, when the exhaust pipe is typically a shared exhaust pipe, meaning multiple range hoods and / or kitchen exhaust hoods are connected to the same exhaust pipe, the simultaneous operation of these multiple range hoods will result in significant resistance within the exhaust pipe. Alternatively, the exhaust pipe can be a non-shared, independent pipe, connecting to the outdoor environment through corresponding openings in the interior wall. In this case, the outdoor wind speed will affect the resistance within the exhaust pipe; higher outdoor wind speeds result in higher resistance, and lower outdoor wind speeds result in lower resistance. The presence of resistance within the exhaust pipe creates a reverse force from the exhaust pipe to the range hood. The magnitude of this reverse force can be determined by measuring the pipe resistance within the exhaust pipe.

[0058] Specifically, under a set operating power, the pipe resistance of the exhaust fan is generally negatively correlated with the actual operating speed of the exhaust fan. That is, the higher the pipe resistance, the higher the load on the exhaust fan, and the lower its actual operating speed; conversely, the lower the pipe resistance, the lower the load on the exhaust fan, and the higher its actual operating speed. Therefore, based on the current operating power and actual operating speed of the exhaust fan, the pipe resistance in the exhaust pipe can be determined.

[0059] It is understood that the specific method for obtaining the pipe resistance can be determined according to actual needs, and this embodiment of the invention does not impose specific limitations on it. In one optional embodiment, it can be obtained by a resistance detection sensor installed in the heat exhaust pipe. In another optional embodiment, the pipe resistance can be mapped to the actual speed and operating power of the heat exhaust fan using a formula or table, and stored in a corresponding memory. When it is necessary to obtain the pipe resistance of the heat exhaust pipe, the current operating power and current actual speed of the heat exhaust fan can be obtained, and the pipe resistance of the heat exhaust pipe can be determined by looking up a table or calculating a formula based on the current operating power and current actual speed, based on the mapping relationship.

[0060] In an exemplary embodiment, the mapping relationship between pipe resistance and the actual rotational speed of the exhaust fan and the operating power of the flue gas fan can be obtained experimentally. For example, by controlling the exhaust fan to operate at a set operating power and controlling the exhaust pipe to have different flue resistances, the actual operating speeds corresponding to different pipe resistances are obtained for the same set operating power, thus forming the actual operating speeds corresponding to different pipe resistances at the set operating power. Similarly, for the actual operating speeds corresponding to different pipe resistances at each set operating power, the mapping relationship between pipe resistance and operating power and actual operating speed can be determined. Specifically, different pipe resistances can be achieved by controlling the number of range hoods and / or cooking hoods connected to the exhaust pipe. For example, when the number of range hoods and / or cooking hoods connected to the exhaust pipe is controlled to be 30% of the total number of range hoods and / or cooking hoods connected to the exhaust pipe, the pipe resistance in the exhaust pipe can be the first pipe resistance. When the number of range hoods and / or cooking hoods connected to the exhaust pipe is controlled to be 50% of the total number of range hoods and / or cooking hoods connected to the exhaust pipe, the pipe resistance in the exhaust pipe can be the second pipe resistance, which is greater than the first pipe resistance. Alternatively, different pipe resistances can also be achieved by controlling the wind speed in the external environment connected to the exhaust pipe. For example, when the wind speed in the external environment is V1, the pipe resistance in the exhaust pipe can be the first pipe resistance; when the wind speed in the external environment is V2, the pipe resistance in the exhaust pipe can be the second pipe resistance. In this case, when V2 is greater than V1, the second pipe resistance is greater than the first pipe resistance. Thus, the more range hoods and / or range hoods connected to the same exhaust pipe that are in operation, or the greater the wind speed in the external environment connected to the exhaust pipe, the greater the flue resistance in the exhaust pipe, thereby controlling the pipe resistance in the exhaust pipe.

[0061] S102. Based on the current flue resistance and the current pipeline resistance, control the switching state of the first connection control module and the second connection control module.

[0062] The switching states of both the first and second connectivity control modules include an on state and an off state. (Reference) Figures 1 to 3 When both the first connection control module 41 and the second connection control module 42 are in the open state, the exhaust port B2 is connected to the heat exhaust pipe C3, allowing the fumes discharged by the exhaust fan 10 to be discharged into the exhaust pipe C2 and the heat exhaust pipe C3 respectively, achieving efficient exhaust of fumes. The heat exhaust port B4 can be connected to the exhaust pipe C2, allowing the heat discharged by the heat exhaust fan 20 to be discharged through the exhaust pipe C2 and the heat exhaust pipe C3 respectively. When the first connection control module 41 is in the open state and the second connection control module 42 is in the closed state, the exhaust port B2 and the heat exhaust port B4 are isolated from the heat exhaust pipe C3, and the fumes discharged by the exhaust fan 10 and the heat discharged by the heat exhaust fan 20 can be discharged into the exhaust pipe C2 through the connecting pipe C1. When the first connection control module 41 is in the closed state and the second connection control module 42 is in the open state, the smoke exhaust port B2 and the heat exhaust port B4 are isolated from the smoke exhaust pipe C2. The oil fumes discharged by the smoke exhaust fan 10 and the heat discharged by the heat exhaust fan 20 can be discharged to the heat exhaust pipe C3 through the connecting pipe C1.

[0063] Specifically, when the exhaust fan operates at the corresponding speed, it can exhaust cooking fumes. By controlling the switching states of the first and second connection control modules, the channels for exhausting cooking fumes and the channels for exhausting heat from the exhaust fan can be controlled accordingly. Since the resistance of the exhaust duct reflects the reverse force exerted on the exhaust fan from that duct, and the resistance of the exhaust duct reflects the reverse force exerted on the exhaust fan from that exhaust duct; generally, the greater the resistance of the exhaust duct, the greater the reverse force exerted on the exhaust fan from that duct, and the less conducive it is to the exhaust of cooking fumes; similarly, the greater the resistance of the exhaust duct, the greater the reverse force exerted on the exhaust fan from that exhaust duct, and the less conducive it is to the exhaust of cooking fumes or heat. Therefore, by obtaining the flue resistance of the exhaust pipe and the pipe resistance of the heat exhaust pipe respectively, and based on the current flue resistance of the exhaust pipe and the current pipe resistance of the heat exhaust pipe, the on / off states of the first connection control module and the second connection control module are controlled accordingly, so that the oil fumes discharged from the exhaust port and the heat discharged from the heat exhaust port can preferentially select the pipe with the lower resistance for discharge, thereby increasing the rate of oil fume or heat discharge.

[0064] In an optional embodiment, controlling the on / off state of the first connection control module and the second connection control module based on the current flue resistance and the current pipe resistance includes: when neither the current flue resistance nor the current pipe resistance is within a preset resistance range, and / or when the current flue resistance and the current pipe resistance are equal, controlling both the first connection control module and the second connection control module to be in an open state; when at least one of the current flue resistance and the current pipe resistance is within the preset resistance range, if the current pipe resistance is greater than the current flue resistance, controlling the first connection control module to be in an open state and controlling the second connection control module to be in a closed state; when at least one of the current flue resistance and the current pipe resistance is within the preset resistance range, if the current flue resistance is greater than the current pipe resistance, controlling the first connection control module to be in a closed state and controlling the second connection control module to be in an open state.

[0065] The preset resistance range can be designed according to actual needs. In an optional embodiment, the preset resistance range can be obtained through experiments. For example, the lower limit of the preset resistance range can be: the resistance value in the exhaust duct when the number of operating range hoods and / or range hoods connected to the same exhaust duct accounts for 30% of the total number of range hoods and / or range hoods connected to the exhaust duct, and the resistance value in the exhaust duct when the number of operating range hoods and / or range hoods connected to the same heat exhaust duct accounts for 30% of the total number of range hoods and / or range hoods connected to the exhaust duct, or the resistance value in the exhaust duct... The resistance value in the exhaust duct when the wind speed in the external environment connected to the duct is V1; the upper limit of the preset resistance range can be: the resistance value in the exhaust duct when the number of operating range hoods and / or range hoods connected to the same exhaust duct accounts for 50% of the total number of range hoods and / or range hoods connected to the same exhaust duct, and the resistance value in the exhaust duct when the number of operating range hoods and / or range hoods connected to the same exhaust duct accounts for 50% of the total number of range hoods and / or range hoods connected to the same exhaust duct, or the resistance value in the exhaust duct when the wind speed in the external environment connected to the exhaust duct is V2.

[0066] Specifically, when the resistance of both the exhaust duct and the heat exhaust duct is less than the lower limit of the preset resistance range, it can be determined that both the exhaust duct and the heat exhaust duct have relatively low resistance. In this case, by controlling both the first and second connection control modules to be in the open state, the fumes at the exhaust outlet can be discharged by the exhaust duct and the heat exhaust duct respectively, thereby increasing the rate of fumes exhaust. When the resistance of both the exhaust duct and the heat exhaust duct is greater than the upper limit of the preset resistance range, it can be determined that both the exhaust duct and the heat exhaust duct have relatively high resistance. In this case, by controlling both the first and second connection control modules to be in the open state, the exhaust duct and the heat exhaust duct can divert the fumes at the exhaust fan outlet respectively, thereby increasing the rate of fumes exhaust or heat exhaust compared to the exhaust pressure of a single duct. Similarly, when the resistance of both the flue gas duct and the heat exhaust duct is less than the lower limit of the preset resistance range, it can be determined that both the flue gas duct and the heat exhaust duct have relatively low resistance. In this case, by controlling both the first and second connection control modules to be in the open state, the heat discharged by the heat exhaust fan can be discharged through the flue gas duct and the heat exhaust duct respectively, thereby increasing the heat exhaust rate. When the resistance of both the flue gas duct and the heat exhaust duct is greater than the upper limit of the preset resistance range, it can be determined that both the flue gas duct and the heat exhaust duct have relatively high resistance. In this case, by controlling both the first and second connection control modules to be in the open state, the flue gas duct and the heat exhaust duct can divert the heat discharged by the heat exhaust fan, thereby increasing the heat exhaust rate compared to the discharge pressure of a single duct.

[0067] When the resistance of both the flue and the heat exhaust pipe are within the preset resistance range, it can be determined that the resistance of the flue and heat exhaust pipes is moderate. At this time, the pipe with relatively lower resistance can be selected for exhausting fumes. For example, when the resistance of the flue is greater than that of the heat exhaust pipe, the second connection control module can be controlled to be in the open state and the first connection control module can be controlled to be in the closed state. The exhaust port is connected to the heat exhaust pipe through the connecting pipe, so that the fumes at the exhaust port can be discharged outdoors through the heat exhaust pipe with lower resistance, ensuring that the exhaust fan has high efficiency in exhausting fumes. When the resistance of the flue is less than that of the heat exhaust pipe, the second connection control module can be controlled to be in the closed state and the first connection control module can be in the open state. The exhaust port is connected to the exhaust pipe through the connecting pipe, so that the fumes or heat at the exhaust fan outlet can be discharged outdoors through the exhaust pipe with lower resistance, ensuring that the exhaust fan has high efficiency in exhausting fumes. Similarly, when the resistance of both the flue gas exhaust pipe and the heat exhaust pipe is within the preset resistance range, it can be determined that the resistance of the flue gas exhaust pipe and the heat exhaust pipe is moderate. At this time, the pipe with relatively lower resistance can be selected for heat exhaust. For example, when the flue gas exhaust pipe resistance is greater than the heat exhaust pipe resistance, the second connection control module can be controlled to be in the open state and the first connection control module can be controlled to be in the closed state. The heat exhaust port is connected to the heat exhaust pipe through the connecting pipe, so that the heat discharged by the heat exhaust fan can be discharged outdoors through the heat exhaust pipe with lower resistance, ensuring that the heat exhaust fan has a high heat exhaust efficiency. When the flue gas exhaust pipe resistance is less than the heat exhaust pipe resistance, the second connection control module can be controlled to be in the closed state and the first connection control module can be in the open state. The heat exhaust port is connected to the flue gas exhaust pipe through the connecting pipe, so that the heat discharged by the heat exhaust fan can be discharged outdoors through the flue gas exhaust pipe with lower resistance, ensuring that the heat exhaust fan has a high heat exhaust efficiency.

[0068] When the resistance of the flue gas duct and the resistance of the heat exhaust duct are equal, regardless of whether their resistances are within a preset range, the first and second connection control modules can be activated. This allows the flue gas duct and the heat exhaust duct to separately divert the fumes from the exhaust fan outlet, increasing the fume extraction rate. Similarly, when the resistance of the flue gas duct and the resistance of the heat exhaust duct are equal, regardless of whether their resistances are within a preset range, the first and second connection control modules can be activated. This allows the flue gas duct and the heat exhaust duct to separately divert the heat discharged by the heat exhaust fan, increasing the heat extraction rate.

[0069] This embodiment incorporates a first and a second connection control module within the connecting pipes. By acquiring the flue resistance of the exhaust pipe and the pipe resistance of the heat dissipation pipe in real time during range hood startup, the on / off states of the first and second connection control modules can be dynamically adjusted based on the current flue resistance and pipe resistance. This allows for dynamic adjustment of the exhaust and heat dissipation paths. By controlling the emission paths of fumes or heat, the range hood achieves high emission efficiency, thereby improving its ventilation efficiency and cooling performance, and enhancing user comfort and intelligent experience.

[0070] Example 3 Figure 11 This is a flowchart of a control method for a range hood provided in Embodiment 3 of the present invention. Based on the above embodiments, this embodiment describes a control method for controlling the operating status of the exhaust fan and the heat exhaust fan according to the current amount of oil fumes and the current ambient temperature. Figure 11 As shown, the control method for the range hood in this embodiment includes: S201. When the range hood is started and running, the amount of oil fume and the ambient temperature of the environment where the range hood is located are obtained in real time.

[0071] The range hood can be equipped with an information acquisition module that can acquire real-time data on the amount of cooking fumes and the ambient temperature of the environment in which the range hood is located. This module may include an infrared temperature sensor. By collecting real-time data on the temperature of the environment around the range hood, the ambient temperature can be directly determined. Furthermore, the amount of cooking fumes in the environment can be determined based on the rate of temperature change.

[0072] S202. Control the operating status of the exhaust fan and the heat exhaust fan according to the current amount of oil fume and the current ambient temperature.

[0073] Specifically, the operating status of the exhaust fan can be controlled based on the current amount of cooking fumes, and the operating status of the heat exhaust fan can be controlled based on the current ambient temperature. For example, if it is determined that there are no cooking fumes in the environment where the range hood is located based on the current amount of cooking fumes, the exhaust fan can be kept off to reduce the overall power consumption of the range hood; conversely, if it is determined that there are cooking fumes in the environment, the exhaust fan can be started to ensure that the cooking fumes in the environment can be quickly discharged outdoors. Similarly, if it is determined that the temperature of the environment where the range hood is located is low or suitable based on the current ambient temperature, the heat exhaust fan can be kept off to save power; conversely, if it is determined that the temperature of the environment where the range hood is located is high, the heat exhaust fan can be started to expel heat from the environment where the range hood is located, achieving rapid cooling.

[0074] In an optional embodiment, the operating states of the exhaust fan and the heat exhaust fan are controlled according to the current amount of oil fumes and the current ambient temperature, including: when the current amount of oil fumes is greater than or equal to a first preset amount of oil fumes and the current ambient temperature is less than a first preset temperature, controlling the exhaust fan to be in a start-up state and controlling the heat exhaust fan to be in a stop-up state; when the current amount of oil fumes is greater than or equal to the first preset amount of oil fumes and the current ambient temperature is greater than or equal to the first preset temperature, controlling both the exhaust fan and the heat exhaust fan to be in a start-up state; when the current amount of oil fumes is less than the first preset amount of oil fumes and the current ambient temperature is greater than or equal to the first preset temperature, controlling the exhaust fan to be in a stop-up state and controlling the heat exhaust fan to be in a start-up state.

[0075] Specifically, when the current amount of cooking fumes is greater than or equal to a first preset amount and the current ambient temperature is lower than a first preset temperature, there is a significant amount of cooking fumes in the environment where the range hood is located. In this case, it is necessary to exhaust the fumes from the environment where the range hood is located. This can be achieved by starting the exhaust fan to create negative pressure in the exhaust chamber, allowing the cooking fumes from the environment where the range hood is located to enter the exhaust chamber and be discharged outdoors by the exhaust fan. The first preset temperature can be a relatively high temperature, for example, greater than or equal to 28°C. When the current ambient temperature is lower than the first preset temperature, it can be determined that the temperature of the environment where the range hood is located is low or suitable, and there is no need to cool the environment where the range hood is located. In this case, the exhaust fan can be stopped to save power.

[0076] When the current amount of cooking fumes is greater than or equal to a first preset amount, and the current ambient temperature is greater than or equal to a first preset temperature, there is a significant amount of cooking fumes in the environment where the range hood is located. In this case, it is necessary to exhaust the fumes from the environment where the range hood is located. Furthermore, the ambient temperature is high, requiring cooling. At this time, both the exhaust fan and the heat exhaust fan can be kept running to create a negative pressure in the exhaust chamber. The cooking fumes from the environment where the range hood is located can enter the exhaust chamber and be discharged outdoors by the exhaust fan. Simultaneously, a negative pressure is created in the heat exhaust chamber where the heat exhaust fan is located, allowing air from the environment where the range hood is located to enter the heat exhaust chamber. The air then exchanges heat with the condenser in the heat exhaust chamber, raising its temperature so that it carries the heat from the environment where the range hood is located. This heated air is then discharged outdoors by the heat exhaust fan, meeting the heat exchange requirements of the environment where the range hood is located, thereby improving the exhaust efficiency and cooling performance of the range hood.

[0077] When the current amount of cooking fumes is less than the first preset amount, it can be considered negligible. In other words, when the current amount of cooking fumes is less than the first preset amount, it can be determined that there is no cooking fumes in the environment where the range hood is located. At this time, there is no need to exhaust fumes from the environment where the range hood is located, and the exhaust fan can be kept off to save power. When the current ambient temperature is greater than or equal to the first preset temperature, it can be determined that the temperature of the environment where the range hood is located is too high, and cooling of the environment is required. At this time, the exhaust fan can be started, creating a negative pressure in the exhaust chamber where the exhaust fan is located. Air from the environment where the range hood is located can enter the exhaust chamber and exchange heat with the condenser in the exhaust chamber, causing the air to heat up. This heated air carries the heat from the environment where the range hood is located. The heated air is then exhausted outdoors by the exhaust fan, meeting the heat exchange needs of the environment where the range hood is located and allowing the temperature of the environment where the range hood is located to quickly cool down to a suitable temperature.

[0078] S203. When the range hood is started and running, the resistance of the exhaust duct and the resistance of the heat exhaust duct are obtained in real time.

[0079] S204. Based on the current flue resistance and the current pipeline resistance, control the switching state of the first connection control module and the second connection control module.

[0080] The first and second connection control modules each have an on / off state. When the first connection control module is on and the second connection control module is off, the exhaust port and / or heat exhaust port are connected to the exhaust pipe but not to the heat exhaust pipe. When both the first and second connection control modules are on, the exhaust port and / or heat exhaust port are connected to the exhaust pipe and the heat exhaust pipe, respectively. When the first connection control module is off and the second connection control module is on, the exhaust port and / or heat exhaust port are connected to the heat exhaust pipe but not to the exhaust pipe.

[0081] This embodiment acquires the amount of oil fumes and the ambient temperature in real time when the range hood is started, and controls the operation of the exhaust fan and the heat exhaust fan according to the oil fumes and ambient temperature, so as to meet the dual needs of exhausting oil fumes and cooling while saving power.

[0082] Example 4 Figure 12 This is a flowchart of a control method for a range hood provided in Embodiment 4 of the present invention. Based on the above embodiments, this embodiment describes the control methods for controlling the on / off state of the third communication control module according to the operating states of the exhaust fan and the heat exhaust fan, and controlling the operating speed of the exhaust fan and / or the heat exhaust fan when the third communication control module is in the off state. Figure 12 As shown, the control method for the range hood in this embodiment includes: S301. When the range hood is started and running, the amount of oil fume and the ambient temperature of the environment where the range hood is located are obtained in real time.

[0083] S302. Control the operating status of the exhaust fan and the heat exhaust fan according to the current amount of oil fume and the current ambient temperature.

[0084] S303. When the range hood is started and running, the resistance of the exhaust duct and the resistance of the heat exhaust duct are obtained in real time.

[0085] S304. Based on the current flue resistance and the current pipeline resistance, control the switching state of the first connection control module and the second connection control module.

[0086] The first and second connection control modules each have an on / off state. When the first connection control module is on and the second connection control module is off, the exhaust port and / or heat exhaust port are connected to the exhaust pipe but not to the heat exhaust pipe. When both the first and second connection control modules are on, the exhaust port and / or heat exhaust port are connected to the exhaust pipe and the heat exhaust pipe, respectively. When the first connection control module is off and the second connection control module is on, the exhaust port and / or heat exhaust port are connected to the heat exhaust pipe but not to the exhaust pipe.

[0087] S305. Control the on / off state of the third connection control module according to the operating status of the smoke exhaust fan and the heat exhaust fan.

[0088] The third connectivity control module has two states: on and off. (Reference) Figure 4 When the third connection control module 43 is in the open state, the connection status between the heat exhaust port B4 and the smoke exhaust port B2 and the smoke exhaust pipe C2 and the heat exhaust pipe C3 can be controlled by controlling the on / off state of the first connection control module 41 and the second connection control module 42. For example, if both the first connection control module 41 and the second connection control module 42 are in the open state, the fumes discharged by the smoke exhaust fan 10 can be discharged into the smoke exhaust pipe C2 and the heat exhaust pipe C3 respectively, or the heat discharged by the heat exhaust fan 20 can be discharged into the smoke exhaust pipe C2 and the heat exhaust pipe C3 respectively. In section 3; when the third connection control module 43 is in the closed state, the connection status between the heat exhaust port B4 and the smoke exhaust port B2 and the smoke exhaust pipe C2 and the heat exhaust pipe C3 can be controlled by controlling the on / off state of the first connection control module 41 and the second connection control module 42. For example, if both the first connection control module 41 and the second connection control module 42 are in the open state, the oil fumes discharged by the smoke exhaust fan 10 can be discharged into the smoke exhaust pipe C2, but cannot be discharged into the heat exhaust pipe C3, and the heat discharged by the heat exhaust fan 20 can only be discharged through the heat exhaust pipe C3. In this way, by controlling the on / off state of the first connection control module, the second connection control module and the third connection control module respectively, the emission channels of oil fumes and heat can be controlled separately, thereby meeting the requirements of efficient oil fume and heat exhaust.

[0089] In an optional embodiment, controlling the on / off state of the third connection control module according to the operating states of the exhaust fan and the heat exhaust fan includes: controlling the third connection control module to be in a closed state when both the exhaust fan and the heat exhaust fan are in the running state, and controlling both the first connection control module and the second connection control module to be in the open state; when the exhaust fan is in the running state and the heat exhaust fan is in the stopped state, the on / off state of the third connection control module is the same as that of the second connection control module; when the heat exhaust fan is in the running state and the exhaust fan is in the stopped state, the on / off state of the third connection control module is the same as that of the first connection control module.

[0090] Specifically, when the current amount of oily smoke is greater than or equal to the first preset amount of oily smoke, the current ambient temperature is greater than or equal to the first preset temperature, and both the exhaust fan and the heat exhaust fan are running, to avoid airflow interference between the oily smoke or heat discharged by the exhaust fan and the heat discharged by the heat exhaust fan, the third connection control module can be controlled to be in the closed state, and the first connection control module and the second connection control module can be controlled to be in the open state. This ensures that the oily smoke discharged by the exhaust fan can only be discharged through the exhaust duct (e.g., ...). Figure 4 (Middle path M1), the heat discharged by the exhaust fan can only be discharged through the exhaust pipe (e.g., Figure 4 (path M2 in the path).

[0091] When the current amount of oily smoke is greater than or equal to the first preset amount of oily smoke, the current ambient temperature is less than the first preset temperature, the exhaust fan is in the started state, and the heat exhaust fan is in the stopped state, the on / off state of the first and second connection control modules can be controlled firstly based on the current flue resistance and the current pipe resistance. This allows for further control of the on / off state of the third connection control module based on the on / off state of the second connection control module. For example, if the flue resistance of the exhaust duct and the pipe resistance of the heat exhaust duct are both outside the preset resistance range, or if the flue resistance of the exhaust duct and the pipe resistance of the heat exhaust duct are equal, then the first and second connection control modules, as well as the third connection control module, can be turned on, allowing the exhaust duct and heat exhaust duct to divert the oily smoke at the exhaust fan outlet (e.g., ...). Figure 13 (Path M4 in the text); If the flue resistance of the exhaust pipe and the pipe resistance of the heat exhaust pipe are both within the preset resistance range, and the flue resistance of the exhaust pipe is greater than the pipe resistance of the heat exhaust pipe, the second connection control module can be controlled to be in the open state, the first connection control module can be controlled to be in the closed state, and the third connection control module can be controlled to be in the open state, so that the oil fumes at the exhaust port can be discharged outdoors through the heat exhaust pipe with lower resistance (e.g., path M4 in the text). Figure 14(Path M5 in the text); If the flue resistance of the exhaust duct and the pipe resistance of the heat exhaust duct are both within the preset resistance range, and the flue resistance of the exhaust duct is less than the pipe resistance of the heat exhaust duct, the second connection control module can be controlled to be in the closed state, the first connection control module can be controlled to be in the open state, and the third connection control module can be controlled to be in the closed state, so that the oil fumes at the exhaust fan outlet can be discharged outdoors through the exhaust duct with lower resistance (e.g., path M5 in the text). Figure 15 The path M6 in the middle ensures that the exhaust fan has a high efficiency in removing oil fumes or heat.

[0092] When the current amount of oil fume is less than the first preset amount of oil fume and the current ambient temperature is greater than or equal to the first preset temperature, the exhaust fan is in a stopped state, while the heat exhaust fan is in a started state. Firstly, based on the current flue resistance and the current pipe resistance, the on / off states of the first and second connection control modules can be controlled. This allows for further control of the third connection control module's on / off state based on the first connection control module's on / off state. For example, if the flue resistance of the exhaust duct and the pipe resistance of the heat exhaust duct are both outside the preset resistance range, or if the flue resistance of the exhaust duct and the pipe resistance of the heat exhaust duct are equal, then the first and second connection control modules, as well as the third connection control module, can be turned on, allowing the exhaust duct and heat exhaust duct to respectively divert the heat discharged by the heat exhaust fan (e.g., Figure 16 (Path M7 in the text); If the flue resistance of the exhaust duct and the pipe resistance of the heat exhaust duct are both within the preset resistance range, and the flue resistance of the exhaust duct is greater than the pipe resistance of the heat exhaust duct, the second connection control module can be controlled to be in the open state, the first connection control module can be controlled to be in the closed state, and the third connection control module can be controlled to be in the closed state, so that the heat discharged by the heat exhaust fan can be discharged outdoors through the heat exhaust duct with lower resistance (e.g., path M7 in the text). Figure 17 (Path M8 in the text); If the flue resistance of the exhaust duct and the pipe resistance of the heat exhaust duct are both within the preset resistance range, and the flue resistance of the exhaust duct is less than the pipe resistance of the heat exhaust duct, the second connection control module can be controlled to be in the closed state, the first connection control module can be controlled to be in the open state, and the third connection control module can be controlled to be in the open state, so that the heat discharged by the heat exhaust fan can be discharged outdoors through the exhaust duct with lower resistance (e.g., path M8 in the text). Figure 18 The path M9 in the middle ensures that the exhaust fan has a high heat removal efficiency.

[0093] S306. When the third connection control module is in the closed state, control the operating speed of the exhaust fan according to the current amount of oil fumes, and / or control the operating speed of the heat exhaust fan according to the current ambient temperature.

[0094] Specifically, when the third connection control module is in the off state, both the exhaust fan and the heat exhaust fan are in the running state. At this time, the operating speed of the exhaust fan can be controlled according to the current amount of oil fumes, and / or the operating speed of the heat exhaust fan can be controlled according to the current ambient temperature. The current operating speed of the exhaust fan is positively correlated with the current amount of oil fumes; that is, the greater the current amount of oil fumes, the higher the current operating speed of the exhaust fan, and vice versa.

[0095] Specifically, the higher the operating speed of the exhaust fan, the greater the air volume it generates, the larger the negative pressure zone it creates, and the stronger the suction, enabling it to expel fumes more quickly. However, a higher operating speed also requires greater driving power, resulting in higher noise and power consumption. Therefore, when the exhaust fan is in operation and used for exhausting fumes, its operating speed can be adjusted according to the current amount of fumes in the environment to simultaneously meet the requirements of rapid fume extraction, low power consumption, and low noise.

[0096] In one exemplary embodiment, when the current amount of cooking fumes in the environment where the range hood is located is high, it is necessary to control the exhaust fan to have a higher operating speed. In this case, the exhaust fan can be controlled to operate at the high-speed setting to ensure that it can generate a large air volume, creating a negative pressure zone with strong suction, so as to quickly exhaust the cooking fumes from the environment where the range hood is located outdoors and prevent the fumes from spreading. When the current amount of cooking fumes in the environment where the range hood is located is relatively low, the exhaust fan can operate at a relatively low speed to generate enough air volume to quickly exhaust the cooking fumes from the environment where the range hood is located outdoors. In this case, the exhaust fan can be controlled to operate at a higher speed. When the exhaust fan operates at its lowest setting, the negative pressure zone created by its operation provides a weaker suction force, requiring less drive power and resulting in lower power consumption and noise. When the amount of cooking fumes in the environment is between high and low, the exhaust fan's operating speed can be between high and low speeds, allowing the airflow to quickly expel the fumes outdoors. In this case, the exhaust fan can operate at its highest setting, where the negative pressure zone provides a relatively moderate suction force. Thus, by controlling the exhaust fan's operating speed according to the current amount of cooking fumes in the environment, rapid fume removal can be achieved while maintaining low power consumption and low noise.

[0097] In other optional embodiments, when the exhaust fan is in operation, its operating speed can be controlled according to the heat output of the stove in the surrounding environment. For example, when stir-frying, the stove is usually set to a higher heat output, resulting in a higher volume of fumes. In this case, the exhaust fan can be controlled to operate at the stir-fry setting to quickly remove the fumes. When frying, the stove is usually set to a lower heat output, resulting in a lower volume of fumes. In this case, the exhaust fan can be controlled to operate at a higher setting to ensure rapid fume removal. When stewing, the stove is usually set to the lowest heat output, resulting in even lower fume production. In this case, the exhaust fan can be controlled to operate at a lower setting to quickly remove fumes while maintaining low power consumption and reduced noise.

[0098] Meanwhile, the current ambient temperature is related to the stove's heat output. When cooking with the stove, the heat output can be controlled based on different cooking methods. The stove's heat output can include, but is not limited to, high, medium, and low heat output. The methods for obtaining the stove's heat output can include, but are not limited to, connecting the range hood controller to the stove's controller so that the range hood controller receives the heat output information sent by the stove's controller and determines the stove's heat output based on this information.

[0099] This embodiment incorporates a third communication control module between the heat exhaust port and the smoke exhaust port. This module's on / off state is controlled based on the operating status of the smoke exhaust fan and the heat exhaust fan, allowing for separate control of the smoke and heat exhaust channels, thus meeting the requirements for efficient smoke and heat removal. Simultaneously, when the third communication control module is off, the operating speed of the smoke exhaust fan is controlled based on the current smoke volume, and / or the operating speed of the heat exhaust fan is controlled based on the current ambient temperature. This ensures that the current operating speed of the smoke exhaust fan matches the amount of smoke in the environment where the range hood is located, achieving rapid smoke removal while maintaining low power consumption and low noise. Similarly, the current operating speed of the heat exhaust fan matches the rate of temperature rise in the environment where the range hood is located, achieving rapid heat removal while maintaining low power consumption and low noise.

[0100] Example 5 Figure 19 This is a flowchart of a control method for a range hood provided in Embodiment 5 of the present invention. Based on the above embodiments, this embodiment describes the control methods for controlling the operating level of the exhaust fan and / or the operating level of the heat exhaust fan. Figure 19 As shown, the control method for the range hood in this embodiment includes: S401. When the range hood is started and running, the amount of oil fume and the ambient temperature of the environment where the range hood is located are obtained in real time.

[0101] S402. Control the operating status of the exhaust fan and the heat exhaust fan according to the current amount of oil fumes and the current ambient temperature.

[0102] S403. When the range hood is started and running, the resistance of the exhaust duct and the resistance of the heat exhaust duct are obtained in real time.

[0103] S404. Based on the current flue resistance and the current pipeline resistance, control the switching state of the first connection control module and the second connection control module.

[0104] The first and second connection control modules each have an on / off state. When the first connection control module is on and the second connection control module is off, the exhaust port and / or heat exhaust port are connected to the exhaust pipe but not to the heat exhaust pipe. When both the first and second connection control modules are on, the exhaust port and / or heat exhaust port are connected to the exhaust pipe and the heat exhaust pipe, respectively. When the first connection control module is off and the second connection control module is on, the exhaust port and / or heat exhaust port are connected to the heat exhaust pipe but not to the exhaust pipe.

[0105] S405. When the exhaust fan is in the start-up state, control the operating level of the exhaust fan according to the current flue resistance and / or the current pipeline resistance; or, when the heat exhaust fan is in the start-up state, control the operating level of the heat exhaust fan according to the current flue resistance and / or the current pipeline resistance.

[0106] It is understandable that when the exhaust fan is in operation, if the fumes at the exhaust fan outlet are discharged outdoors through the exhaust duct with low resistance, the operating level of the exhaust fan can be controlled according to the current duct resistance; conversely, if the fumes at the exhaust fan outlet are discharged outdoors through the exhaust duct with low resistance, the operating level of the exhaust fan can be controlled according to the current duct resistance. This embodiment uses controlling the operating level of the exhaust fan according to the current duct resistance as an example to illustrate the technical solution of the present invention.

[0107] The current operating speed of the exhaust fan is positively correlated with the current flue resistance; that is, the higher the current flue resistance, the higher the current operating speed of the exhaust fan; conversely, the lower the current flue resistance, the lower the current operating speed of the exhaust fan.

[0108] Understandably, exhaust fans can have multiple operating speeds, each with different power outputs, resulting in different operating speeds. Generally, the operating speed and power output are positively correlated, and vice versa; that is, a higher operating speed results in higher power output and a higher operating speed. Therefore, when it's necessary to increase the operating speed of an exhaust fan, the operating speed can be increased accordingly.

[0109] In an exemplary embodiment, the operating speed of the exhaust fan may include a first operating speed, a second operating speed, and a third operating speed. Under the same flue resistance, the operating speed of the exhaust fan in the first operating speed is lower than its operating speed in the second operating speed, and the operating speed of the exhaust fan in the second operating speed is lower than its operating speed in the third operating speed.

[0110] Specifically, when the exhaust fan starts running, it can be controlled to have a corresponding initial operating power. By obtaining the actual operating speed of the exhaust fan at this initial operating power, the current flue resistance of the exhaust duct can be determined. Based on the current flue resistance, the direction of adjusting the actual operating speed of the exhaust fan can be determined. For example, when the current flue resistance is large, the exhaust fan will have a large load when running at the initial operating power, and its current actual operating speed will be relatively low, which is not conducive to the discharge of fumes or heat. The operating power of the exhaust fan can be increased accordingly, that is, the operating level of the exhaust fan can be increased, so that the actual operating speed of the exhaust fan can be relatively increased, so as to quickly discharge fumes or heat. Conversely, when the current flue resistance is low, operating the exhaust fan at its initial power results in a lower load and a relatively higher actual operating speed. This allows for rapid removal of fumes or heat. However, higher power leads to higher power consumption and noise levels. Therefore, the operating power of the exhaust fan can be appropriately reduced, i.e., the operating speed can be lowered accordingly. This ensures that the actual operating speed meets the requirements for fume removal while maintaining low power consumption and low noise. Thus, by adjusting the exhaust fan's operating speed based on the current flue resistance, the actual operating speed can be matched to the current flue resistance, achieving rapid fume removal while maintaining low power consumption and low noise.

[0111] In an exemplary embodiment, taking the operation levels of the exhaust fan as including a first operation level, a second operation level, and a third operation level as an example, when the current flue resistance is less than or equal to a first resistance threshold, the current operation level of the exhaust fan can be controlled to be the first operation level; when the current flue resistance is greater than the first resistance threshold but less than a second resistance threshold, the current operation level of the exhaust fan can be controlled to be the second operation level; and when the current flue resistance is greater than or equal to the second resistance threshold, the current operation level of the exhaust fan can be controlled to be the third operation level. Thus, the greater the current flue resistance, the higher the current operation level of the exhaust fan, meaning there is a positive correlation between the operation level of the exhaust fan and the flue resistance.

[0112] It is also understood that when the exhaust fan is in operation, if the heat discharged by the exhaust fan is discharged outdoors through the exhaust duct with low resistance, the operating level of the exhaust fan can be controlled according to the current duct resistance; if the heat discharged by the exhaust fan is discharged outdoors through the exhaust duct with low resistance, the operating level of the exhaust fan can be controlled according to the current duct resistance. This embodiment uses controlling the operating level of the exhaust fan according to the current duct resistance as an example to illustrate the technical solution of the present invention.

[0113] The current operating level of the exhaust fan is positively correlated with the current pipe resistance; that is, the higher the current pipe resistance, the higher the current operating level of the exhaust fan; conversely, the lower the current pipe resistance, the lower the current operating level of the exhaust fan.

[0114] Understandably, exhaust fans can have multiple operating speeds, each with different power outputs, resulting in different operating speeds. Generally, the operating speed and power output are positively correlated; that is, the higher the operating speed, the higher the power output, and the higher the operating speed. Therefore, when it's necessary to increase the operating speed of the exhaust fan, the operating speed can be increased accordingly.

[0115] In an exemplary embodiment, the operating speed of the exhaust fan may include a first exhaust speed, a second exhaust speed, and a third exhaust speed. Under the same pipe resistance, the operating speed of the exhaust fan in the first exhaust speed is lower than its operating speed in the second exhaust speed, and the operating speed of the exhaust fan in the second exhaust speed is lower than its operating speed in the third exhaust speed.

[0116] Specifically, when the exhaust fan starts running, it can be controlled to have a corresponding initial operating power. By obtaining the actual operating speed of the exhaust fan at this initial operating power, the current pipe resistance of the exhaust pipe can be determined accordingly. Based on the current pipe resistance, the direction of adjusting the actual operating speed of the exhaust fan can be determined. For example, when the current pipe resistance is large, the exhaust fan will have a large load when running at the initial operating power, and its current actual operating speed will be relatively low, which is not conducive to heat dissipation. The operating power of the exhaust fan can be increased accordingly, that is, the operating level of the exhaust fan can be increased, so that the actual operating speed of the exhaust fan can be relatively increased, so that heat can be dissipated quickly. Conversely, when the current pipe resistance is low, operating the exhaust fan at its initial power results in a lower load and a relatively higher actual operating speed, enabling rapid heat removal. However, this higher power leads to higher power consumption and noise levels in the range hood. Therefore, the exhaust fan's power can be appropriately reduced, i.e., its operating speed can be lowered. This ensures the actual operating speed meets the heat removal requirements while maintaining low power consumption and low noise. Thus, by adjusting the exhaust fan's operating speed according to the current pipe resistance, the actual operating speed can be matched to the pipe resistance, achieving rapid heat removal while maintaining low power consumption and low noise.

[0117] In an exemplary embodiment, taking the operation settings of the exhaust fan as including a first exhaust setting, a second exhaust setting, and a third exhaust setting as an example, when the current pipe resistance is less than or equal to a first pipe resistance threshold, the current operation setting of the exhaust fan can be controlled to the first operation setting; when the current pipe resistance is greater than the first pipe resistance threshold but less than a second pipe resistance threshold, the current operation setting of the exhaust fan can be controlled to the second exhaust setting; and when the current pipe resistance is greater than or equal to the second pipe resistance threshold, the current operation setting of the exhaust fan can be controlled to the third exhaust setting. Thus, the greater the current pipe resistance, the higher the current operation setting of the exhaust fan, meaning there is a positive correlation between the operation setting of the exhaust fan and the pipe resistance.

[0118] It is understood that the first pipe resistance threshold may be the same as or different from the first resistance threshold mentioned in the above embodiments, and the second pipe resistance threshold may be the same as or different from the second resistance threshold mentioned in the above embodiments. The specific design can be tailored to actual needs, and this embodiment of the invention does not impose specific limitations on this. In an optional embodiment, because the rated power of the exhaust fan is greater than the rated power of the heat exhaust fan, the heat exhaust fan has a smaller driving capability. Therefore, the first resistance threshold can be set to be greater than the first pipe resistance threshold, and the second resistance threshold can be set to be greater than the second pipe resistance threshold, to meet the rapid heat dissipation requirements of the heat exhaust fan.

[0119] Furthermore, in another optional embodiment, when using an exhaust fan to remove heat, the operating speed of the exhaust fan can be matched to the number of users in the environment where the range hood is located. The number of users in the environment can be detected using infrared sensors or similar methods to further determine the number of users in the environment where the range hood is located.

[0120] Among them, the current operating speed of the exhaust fan is positively correlated with the current number of users. That is, the more users there are in the environment where the range hood is located, the higher the current operating speed of the exhaust fan; conversely, the fewer users there are in the environment where the range hood is located, the lower the current operating speed of the exhaust fan.

[0121] Specifically, when there are no users in the environment where the range hood is located, there is no need to rapidly cool the surrounding area. The temperature only needs to be lowered to a suitable level when a user enters the area. In this case, the exhaust fan does not need to operate at a high speed. The exhaust fan has low power consumption and can operate with low noise. Because the suction force of the negative pressure zone created by the exhaust fan is weak, the air in the environment flows to the exhaust fan with a small flow rate, and after heat exchange and warming by the condenser of the exhaust fan, it is slowly discharged. The temperature of the environment around the range hood can gradually decrease to a suitable level. However, when there are users in the environment, rapid cooling is required to quickly reach a suitable temperature and improve the user experience. In this case, the exhaust fan can operate at a higher speed. The negative pressure zone of the range hood has strong suction, causing a large airflow to the exhaust fan. The air is then heated by heat exchange in the condenser of the exhaust fan before being quickly discharged, rapidly lowering the temperature of the environment around the range hood to a comfortable level. When there are many users in the environment, the temperature is already high, and the users themselves generate heat. In this case, even faster cooling is needed to reach a suitable temperature. The exhaust fan can operate at a higher speed, creating an even stronger negative pressure zone. This results in a larger airflow to the exhaust fan, where the air is heated by heat exchange in the condenser before being quickly discharged, further lowering the temperature to a comfortable level.

[0122] This embodiment controls the operating speed of the exhaust fan based on the current flue resistance and / or pipe resistance when the exhaust fan is running; similarly, it controls the operating speed of the heat exhaust fan based on the current flue resistance and / or pipe resistance when the heat exhaust fan is running. This ensures that the current operating speed of the exhaust fan matches the flue / pipe resistance, and vice versa, thereby ensuring low power consumption and low noise while meeting the requirements for rapid smoke and heat removal. Furthermore, by further determining the number of users in the environment where the range hood is located, the operating speeds of the exhaust and heat exhaust fans can be matched to the number of users, thus ensuring low power consumption and low noise while meeting the cooling requirements of the environment.

[0123] Example 6 Figure 20 This is a flowchart of a control method for a range hood provided in Embodiment Six of the present invention. Based on the above embodiments, this embodiment describes the control method for controlling the switching state of the fourth interconnection control module according to the current amount of cooking fumes and the current ambient temperature. Figure 20As shown, the control method for the range hood in this embodiment includes: S501. When the range hood is started and running, the resistance of the exhaust duct and the resistance of the heat exhaust duct are obtained in real time.

[0124] S502. Based on the current flue resistance and the current pipeline resistance, control the switching state of the first connection control module and the second connection control module.

[0125] The first and second connection control modules each have an on / off state. When the first connection control module is on and the second connection control module is off, the exhaust port and / or heat exhaust port are connected to the exhaust pipe but not to the heat exhaust pipe. When both the first and second connection control modules are on, the exhaust port and / or heat exhaust port are connected to the exhaust pipe and the heat exhaust pipe, respectively. When the first connection control module is off and the second connection control module is on, the exhaust port and / or heat exhaust port are connected to the heat exhaust pipe but not to the exhaust pipe.

[0126] S503. When the range hood is started and running, the amount of oil fume and the ambient temperature of the environment where the range hood is located are obtained in real time.

[0127] The range hood can be equipped with an information acquisition module that can acquire real-time data on the amount of cooking fumes and the ambient temperature of the environment in which the range hood is located. This module may include an infrared temperature sensor. By collecting real-time data on the temperature of the environment around the range hood, the ambient temperature can be directly determined. Furthermore, the amount of cooking fumes in the environment can be determined based on the rate of temperature change.

[0128] S504. Based on the current amount of oil fume and the current ambient temperature, control the switching state of the fourth connection control module.

[0129] The fourth connection control module has two states: open and closed. When the fourth connection control module is open, the smoke exhaust chamber and the heat exhaust chamber are connected. When the fourth connection control module is closed, the smoke exhaust chamber and the heat exhaust chamber are not connected.

[0130] Specifically, the on / off state of the fourth connection control module can be determined based on the current amount of oil fumes and the current ambient temperature. For example, if the current amount of oil fumes indicates that there are few or no oil fumes, and the current ambient temperature indicates that the temperature of the environment where the range hood is located is high, the fourth connection control module can be controlled to be in the on state. Conversely, if the current amount of oil fumes indicates that there are some oil fumes, and / or the current ambient temperature indicates that the temperature of the environment where the range hood is located is low, the fourth connection control module can be controlled to be in the off state.

[0131] In an optional embodiment, controlling the on / off state of the fourth connectivity control module based on the current amount of cooking fumes and the current ambient temperature includes: when the current amount of cooking fumes and the current ambient temperature meet a first preset condition, controlling the current on / off state of the fourth connectivity control module to be in an on state; wherein the first preset condition includes the current amount of cooking fumes being less than a first preset amount of cooking fumes and the current ambient temperature being greater than or equal to a second preset temperature; when the current amount of cooking fumes and the current ambient temperature meet a second preset condition, controlling the current on / off state of the fourth connectivity control module to be in a off state; wherein the second preset condition includes at least one of the current amount of cooking fumes being greater than or equal to the first preset amount of cooking fumes and the current ambient temperature being less than a second preset temperature.

[0132] Understandably, the first preset smoke volume can be a relatively small amount. When the current smoke volume is less than the first preset smoke volume, it can be determined that there is almost no smoke in the environment where the range hood is located, and no smoke extraction is needed. In this case, the user can be in a non-cooking state and prepare food in the environment where the range hood is located. Conversely, when the current smoke volume is greater than or equal to the first preset smoke volume, it can be determined that there is smoke in the environment where the range hood is located, and the user is in a cooking state, requiring smoke extraction. The second preset temperature can be a relatively high temperature, for example, a temperature greater than or equal to 32°C. When the current ambient temperature is greater than or equal to the second preset temperature, it can be determined that the temperature in the environment where the range hood is located is high, and the user in this environment may feel uncomfortable. In this case, rapid heat extraction is needed to ensure that the temperature is quickly cooled down to a comfortable level. When the current ambient temperature is less than the second preset temperature, it can be determined that the temperature in the environment where the range hood is located is low, and no cooling is needed, or rapid heat extraction is not needed to quickly reach a comfortable temperature. Thus, by judging whether the current amount of oil fume and the current ambient temperature meet the first or second preset conditions, it is determined whether oil fume needs to be discharged and whether rapid heat dissipation is needed, thereby controlling the switching state of the fourth interconnection control module accordingly.

[0133] S505. When the fourth connection control module is in the open state, control the smoke exhaust fan to start running and control the heat exhaust fan to stop running.

[0134] It is understandable that the rated power of the exhaust fan in a range hood is greater than that of the exhaust fan, which makes the driving capacity of the exhaust fan greater than that of the exhaust fan, and thus the gas emission of the exhaust fan is greater than that of the exhaust fan.

[0135] Specifically, when the fourth connection control module is in the active state, the current ambient temperature and the current amount of cooking fumes meet the first preset condition. That is, based on the current ambient temperature, it can be determined that the temperature of the environment where the range hood is located is high, and based on the current amount of cooking fumes, it can be determined that there is no need to exhaust fumes from the environment where the range hood is located. At this time, the exhaust fan can be started, creating a negative pressure in the exhaust chamber where the exhaust fan is located. The air entering the exhaust chamber from the hot air inlet is heated by heat exchange in the condenser, then enters the exhaust chamber through the active fourth connection control module and is exhausted by the exhaust fan in the exhaust chamber. This allows for rapid heat removal compared to using an exhaust fan with a smaller rated power, enabling the temperature of the environment where the range hood is located to quickly drop to a comfortable temperature. Conversely, when the fourth connection control module is in the active state, the exhaust fan can be stopped to prevent airflow turbulence and reduce the overall power consumption of the range hood.

[0136] In an optional embodiment, when the range hood further includes a baffle plate disposed at the smoke inlet, the control method of the range hood may further include: when the fourth communication control module is in the open state, controlling the baffle plate to be in the closed state to cover the smoke inlet.

[0137] Specifically, when the smoke baffle is in the closed state, it can cover the smoke inlet, preventing the exhaust chamber from communicating with the environment where the range hood is located through the smoke inlet; while when the smoke baffle is in the open state, it can expose the smoke inlet, allowing the exhaust chamber to communicate with the environment where the range hood is located through the smoke inlet.

[0138] Specifically, since the fourth connection control module is only activated when there is no need to exhaust fumes from the environment where the range hood is located, it can control the baffle to be closed when the fourth connection control module is activated. This prevents air from the environment where the range hood is located from directly entering the exhaust chamber through the smoke inlet, thus affecting the exhaust efficiency of the air carrying heat after heat exchange and heating in the condenser in the heat dissipation chamber. When the fourth connection control module is closed, the baffle's on / off state can be controlled based on whether there is a need for exhaust fumes in the environment where the range hood is located. For example, when there is a need for exhaust fumes in the environment where the range hood is located, the baffle can be activated to open, allowing fumes to enter the exhaust chamber through the smoke inlet and be discharged outdoors by the exhaust fan; when there is no need for exhaust fumes in the environment where the range hood is located, the baffle can be activated to close, preventing backflow of fumes connected to the range hood.

[0139] In another optional embodiment, when there is no cooking fumes in the environment where the range hood is located, and the temperature of the environment is relatively high, the fourth connection control module can be controlled to be in the "on" state, and the exhaust fan can be started and running. In this case, the exhaust fan can be used for heat removal. When using the exhaust fan for heat removal, the operating level of the exhaust fan can be matched to the number of users in the environment where the range hood is located. The number of users in the environment where the range hood is located can be detected using infrared detection sensors, etc., to further determine the number of users in the environment where the range hood is located.

[0140] In another optional embodiment, the on / off states of the first, second, and third electric control modules can be controlled according to the current number of users in the environment where the range hood is located. When there are many users in the environment where the range hood is located, the heat generated by the users themselves is high and requires rapid heat dissipation. At this time, the first, second, and third electric control modules can be controlled to be in the on state, so that the heat discharged from the exhaust fan outlet can be discharged outdoors through the exhaust pipe and the heat dissipation pipe, respectively. When there are few users in the environment where the range hood is located, the heat generated by the users themselves is relatively low and does not require rapid heat dissipation. At this time, the second and third electric control modules can be controlled to be in the off state, and the first electric control module can be in the on state, so that the heat discharged from the exhaust fan outlet can be discharged outdoors through the exhaust pipe to meet the cooling requirements. Alternatively, when there are few users in the environment where the range hood is located, the first electric control module can be controlled to be in the off state, and the second and third electric control modules can be in the on state, so that the heat discharged from the exhaust fan outlet can be discharged outdoors through the heat dissipation pipe to meet the cooling requirements. Thus, based on the number of users in the environment where the range hood is located, the required heat exhaust rate of the exhaust fan can be determined accordingly, thereby controlling the on / off state of the first, second, and third connection control modules.

[0141] In an optional embodiment, controlling the current on / off state of the first connection control module, the second connection control module, and the third connection control module based on the current number of users may include: when the current number of users is greater than or equal to a first quantity threshold, controlling the current on / off state of the first connection control module, the second connection control module, and the third connection control module to be in an on state; when the current number of users is less than the first quantity threshold, further controlling the current on / off state of the first connection control module, the second connection control module, and the third connection control module to be in a closed state based on the current flue resistance of the flue pipe and the current pipe resistance of the heat exhaust pipe.

[0142] The first quantity threshold can be a value greater than or equal to 2. In an exemplary embodiment, the first quantity threshold can be equal to 2. That is, when the current number of users is greater than or equal to 2, the current switch state of the second and third connection control modules can be controlled to be on, so that the heat discharged from the exhaust fan outlet can be discharged through the exhaust pipe and the heat exhaust pipe. When the current number of users is less than 2, that is, when the current number of users is 1 or 0, if the current flue resistance is less than the current pipe resistance, the second and third connection control modules can be controlled to be off, and the first connection control module can be on, so that the heat discharged from the exhaust fan outlet can be discharged through the exhaust pipe. When the current number of users is less than 2, if the current flue resistance is greater than the current pipe resistance, the second and third connection control modules can be controlled to be on, and the first connection control module can be on, so that the heat discharged from the exhaust fan outlet can be discharged through the exhaust pipe.

[0143] In another optional embodiment, when the current amount of oil fume is greater than the first preset amount of oil fume, the third connection control module can be controlled to be in a closed state.

[0144] When the current amount of cooking fumes exceeds the first preset amount, the exhaust fan needs to be activated to remove the fumes. Typically, the exhaust pipes connect directly to the outside through openings in the exterior wall. Since cooking fumes usually include smoke, oil, and moisture, directly discharging them outdoors through the exhaust pipes would cause environmental pollution. Therefore, when activating the exhaust fan, the second and third connection control modules must be kept closed to prevent fumes from being directly discharged outdoors through the exhaust pipes and causing environmental pollution.

[0145] In another optional embodiment, when using a smoke exhaust fan to remove heat, the current operating speed of the smoke exhaust fan can also be positively correlated with the current firepower of the stove. That is, the higher the current firepower of the stove, the higher the current operating speed of the smoke exhaust fan; conversely, the lower the current firepower of the stove, the lower the current operating speed of the smoke exhaust fan.

[0146] Specifically, the higher the operating speed of the exhaust fan, the greater the air volume it generates, the larger the negative pressure zone it creates, and the stronger the suction, enabling it to expel heat more quickly. However, a higher operating speed also requires greater driving power, resulting in higher noise and power consumption. Therefore, when the exhaust fan is running, the rate of temperature rise in the environment can be determined based on the heat output of the stove in the surrounding area. The current operating speed of the exhaust fan can then be adjusted accordingly to simultaneously meet the requirements of rapid heat removal, low power consumption, and low noise.

[0147] Furthermore, in another optional embodiment, when using an exhaust fan to remove heat, the operating speed of the exhaust fan can be matched with the number of users in the environment where the range hood is located. The number of users in the environment can be detected using infrared sensors or similar methods to further determine the number of users in the environment.

[0148] Among them, the current operating speed of the exhaust fan is positively correlated with the current number of users. That is, the more users there are in the environment where the range hood is located, the higher the current operating speed of the exhaust fan; conversely, the fewer users there are in the environment where the range hood is located, the lower the current operating speed of the exhaust fan.

[0149] This embodiment acquires the amount of cooking fumes and the ambient temperature in real time when the range hood is running. Based on these parameters, it controls the on / off state of the fourth interconnection control module. When the fourth interconnection control module is on, it controls the exhaust fan to start and the heat exhaust fan to stop. This allows the use of a high-power exhaust fan to quickly expel the air, which has been heated by heat exchange and carries the heat from the environment around the range hood, outdoors, achieving rapid cooling and improving the cooling effect of the range hood.

[0150] Example 7 Figure 21 This is a structural block diagram of a control device for a range hood provided in Embodiment 7 of the present invention. This embodiment is applicable to situations where the exhaust path and heat exhaust path are dynamically adjusted based on pipe resistance. The control device for this range hood can be implemented in hardware and / or software, and can be configured in the controller of the range hood provided in this embodiment of the present invention. Figure 21 As shown, the control device for the range hood in this embodiment includes: The resistance acquisition module 601 is used to acquire the flue resistance of the exhaust pipe and the pipe resistance of the heat exhaust pipe in real time when the range hood is started and running.

[0151] The first state control module 602 controls the switching states of the first connection control module and the second connection control module based on the current flue resistance and the current pipe resistance. Both the first and second connection control modules have an on state and a closed state. When the first connection control module is on and the second connection control module is off, the flue gas outlet and / or the heat exhaust outlet are connected to the flue gas pipe but not to the heat exhaust pipe. When both the first and second connection control modules are on, the flue gas outlet and / or the heat exhaust outlet are connected to the flue gas pipe and the heat exhaust pipe, respectively. When the first connection control module is off and the second connection control module is on, the flue gas outlet and / or the heat exhaust outlet are connected to the heat exhaust pipe, but not to the flue gas pipe.

[0152] The control device for the range hood provided in this embodiment can execute the control method of the range hood in any embodiment of the present invention, and has the functional module for executing the control method of the range hood in any embodiment of the present invention. It can achieve the effect of the control method of the range hood in the above embodiment. The similarities can be referred to the above description, and will not be repeated here.

[0153] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A control method for a range hood, characterized in that, The range hood includes an independent smoke exhaust chamber and a heat exhaust chamber; the smoke exhaust chamber is connected to a smoke inlet and a smoke outlet respectively, and a smoke exhaust fan is installed in the smoke exhaust chamber; the heat exhaust chamber is connected to a condenser air inlet and a heat exhaust outlet respectively, and at least a heat exhaust fan is installed in the heat exhaust chamber; the smoke exhaust outlet and the heat exhaust outlet are both connected to a smoke exhaust pipe and a heat exhaust pipe via connecting pipes; a first connection control module and a second connection control module are installed in the connecting pipes, the first connection control module being located between the smoke exhaust outlet and the smoke exhaust pipe, and the second connection control module being located between the heat exhaust outlet and the heat exhaust pipe; the control method of the range hood includes: When the range hood is started and running, the flue resistance of the exhaust pipe and the pipe resistance of the heat exhaust pipe are acquired in real time. Based on the current flue resistance and the current pipeline resistance, control the switching states of the first connection control module and the second connection control module; The first and second connection control modules each have an on / off state. When the first connection control module is on and the second connection control module is off, the exhaust port and / or the heat exhaust port are connected to the exhaust pipe but not to the heat exhaust pipe. When both the first and second connection control modules are on, the exhaust port and / or the heat exhaust port are connected to the exhaust pipe and the heat exhaust pipe, respectively. When the first connection control module is off and the second connection control module is on, the exhaust port and / or the heat exhaust port are connected to the heat exhaust pipe but not to the exhaust pipe.

2. The control method for a range hood according to claim 1, characterized in that, Based on the current flue resistance and the current pipe resistance, the switching states of the first connectivity control module and the second connectivity control module are controlled, including: When the current flue resistance and the current pipe resistance are both outside the preset resistance range, and / or when the current flue resistance and the current pipe resistance are equal, the first connection control module and the second connection control module are both controlled to be in the open state. When at least one of the current flue resistance and the current pipe resistance is within the preset resistance range, if the current pipe resistance is greater than the current flue resistance, then the first connection control module is controlled to be in the open state and the second connection control module is controlled to be in the closed state. When at least one of the current flue resistance and the current pipe resistance is within the preset resistance range, if the current flue resistance is greater than the current pipe resistance, then the first connection control module is controlled to be in the closed state and the second connection control module is controlled to be in the open state.

3. The control method for a range hood according to claim 1, characterized in that, Also includes: When the range hood is started and running, the amount of oil fume and the ambient temperature of the environment in which the range hood is located are acquired in real time. The operating status of the exhaust fan and the heat exhaust fan is controlled based on the current amount of oil fumes and the current ambient temperature.

4. The control method for a range hood according to claim 3, characterized in that, Based on the current amount of oil fume and the current ambient temperature, control the operating status of the exhaust fan and the heat exhaust fan, including: When the current amount of oil fume is greater than or equal to the first preset amount of oil fume, and the current ambient temperature is less than the first preset temperature, the exhaust fan is controlled to start running, and the heat exhaust fan is controlled to stop running. When the current amount of oil fume is greater than or equal to the first preset amount of oil fume, and the current ambient temperature is greater than or equal to the first preset temperature, the exhaust fan and the heat exhaust fan are both controlled to be in the start-up state. When the current amount of oil fume is less than the first preset amount of oil fume, and the current ambient temperature is greater than or equal to the first preset temperature, the exhaust fan is controlled to stop running, and the heat exhaust fan is controlled to start running.

5. The control method for a range hood according to claim 3, characterized in that, A third connection control module is also provided inside the connecting pipe, and the third connection control module is located between the heat exhaust port and the smoke exhaust port; the control method of the range hood further includes: The switching state of the third communication control module is controlled according to the operating status of the exhaust fan and the heat exhaust fan; The third connection control module has two states: an on state and a off state. When the third connection control module is on, the connecting pipe between the first connection control module and the second connection control module is connected to the heat exhaust port and the smoke exhaust port, respectively. When the third connection control module is off, the smoke exhaust port is connected to the connecting pipe between the first connection control module and the third connection control module, and the heat exhaust port is connected to the connecting pipe between the third connection control module and the second connection control module.

6. The control method for a range hood according to claim 5, characterized in that, Based on the operating status of the exhaust fan and the heat exhaust fan, the switching status of the third communication control module is controlled, including: When both the exhaust fan and the heat exhaust fan are in the start-up state, the third connection control module is controlled to be in the closed state, and the first connection control module and the second connection control module are controlled to be in the open state. When the exhaust fan is in the start-up state and the exhaust heat fan is in the stop-operation state, the switch state of the third connection control module is the same as that of the second connection control module. When the exhaust fan is in the start-up state and the smoke exhaust fan is in the stop-operation state, the switch state of the third connection control module is the same as that of the first connection control module.

7. The control method for a range hood according to claim 5, characterized in that, Also includes: When the third connection control module is in the off state, the operating speed of the exhaust fan is controlled according to the current amount of oil fume, and / or the operating speed of the heat exhaust fan is controlled according to the current ambient temperature.

8. The control method for a range hood according to claim 3, characterized in that, Also includes: When the exhaust fan is in the start-up state, the operating speed of the exhaust fan is controlled according to the current flue resistance and / or the current pipeline resistance. or, When the exhaust fan is in the start-up state, the operating level of the exhaust fan is controlled according to the current flue resistance and / or the current pipeline resistance.

9. The control method for a range hood according to claim 1, characterized in that, The range hood also includes a fourth communication control module disposed on the cavity wall between the smoke exhaust cavity and the heat exhaust cavity; The control method for the range hood also includes: When the range hood is started and running, the amount of oil fume and the ambient temperature of the environment in which the range hood is located are acquired in real time. The on / off state of the fourth connection control module is controlled based on the current amount of oil fume and the current ambient temperature; wherein, the on / off state of the fourth connection control module includes an on state and a closed state; when the fourth connection control module is in the on state, the smoke exhaust chamber and the heat exhaust chamber are connected; when the fourth connection control module is in the closed state, the smoke exhaust chamber and the heat exhaust chamber are not connected to each other; When the fourth communication control module is in the open state, it controls the start-up of the exhaust fan and controls the stop-run of the heat exhaust fan.

10. A control device for a range hood, characterized in that, The range hood includes an independent smoke exhaust chamber and a heat exhaust chamber; the smoke exhaust chamber is connected to a smoke inlet and a smoke outlet respectively, and a smoke exhaust fan is installed in the smoke exhaust chamber; the heat exhaust chamber is connected to a condenser air inlet and a heat exhaust outlet respectively, and at least a heat exhaust fan is installed in the heat exhaust chamber; the smoke exhaust outlet and the heat exhaust outlet are both connected to a smoke exhaust pipe and a heat exhaust pipe via connecting pipes; a first connection control module and a second connection control module are installed in the connecting pipes, the first connection control module being located between the smoke exhaust outlet and the smoke exhaust pipe, and the second connection control module being located between the heat exhaust outlet and the heat exhaust pipe; the control device of the range hood includes: The resistance acquisition module is used to acquire the flue resistance of the exhaust pipe and the pipe resistance of the heat exhaust pipe in real time when the range hood is started and running. The first state control module is used to control the switching state of the first connection control module and the second connection control module according to the current flue resistance and the current pipe resistance. The first and second connection control modules each have an on / off state. When the first connection control module is on and the second connection control module is off, the exhaust port and / or the heat exhaust port are connected to the exhaust pipe but not to the heat exhaust pipe. When both the first and second connection control modules are on, the exhaust port and / or the heat exhaust port are connected to the exhaust pipe and the heat exhaust pipe, respectively. When the first connection control module is off and the second connection control module is on, the exhaust port and / or the heat exhaust port are connected to the heat exhaust pipe but not to the exhaust pipe.

11. A range hood, characterized in that, include: Independent smoke exhaust chamber and heat exhaust chamber; The smoke exhaust chamber is connected to the smoke inlet and the smoke outlet respectively, and a smoke exhaust fan is installed in the smoke exhaust chamber; The heat exhaust chamber is connected to the condenser air inlet and the heat exhaust outlet respectively, and at least one heat exhaust fan is provided in the heat exhaust chamber; Both the flue gas outlet and the heat exhaust outlet are connected to the flue gas pipe and the heat exhaust pipe via connecting pipes; a first connection control module and a second connection control module are provided in the connecting pipes, the first connection control module is located between the flue gas outlet and the flue gas pipe, and the second connection control module is located between the heat exhaust outlet and the heat exhaust pipe; The range hood further includes a controller; the controller is connected to the first communication control module and the second communication control module respectively; the controller is used to execute the control method of the range hood according to any one of claims 1-9.

12. The range hood according to claim 11, characterized in that, The connecting pipe is also equipped with a third connection control module; the third connection control module is located between the heat exhaust port and the smoke exhaust port. The controller is also connected to the third communication control module; the controller is also used to control the on / off state of the third communication control module according to the operating status of the exhaust fan and the heat exhaust fan.

13. The range hood according to claim 11, characterized in that, Also includes: A fourth communication control module is disposed on the cavity wall between the smoke exhaust cavity and the heat exhaust cavity; The controller is also connected to the fourth communication control module; the controller is also used to acquire the amount of oil fume and the ambient temperature of the environment where the range hood is located in real time; and to control the on / off state of the fourth communication control module according to the current amount of oil fume and the current ambient temperature.

Images