Range hood and control method thereof

Abstract

The invention relates to a range hood and a control method thereof, a range hood main body comprises an air inlet and an air outlet, and a cold air cavity is communicated between the air inlet and the air outlet. The cold air assembly is arranged in the cold air cavity, the refrigerating unit is connected with the cold air assembly to form a circulating refrigerating loop, and a cooling medium circulates in the circulating refrigerating loop and is used for cooling airflow fed from the air inlet into cold air and blowing the cold air out of the air outlet; and the heat dissipation unit is arranged close to the circulating refrigeration loop and is used for enabling the temperature of the cooling medium in the circulating refrigeration loop to be lower than the set temperature. According to the range hood, the device capable of blowing out cold air is additionally arranged in the internal space of the range hood, the space of a kitchen is not additionally occupied, the added value of an existing range hood is increased, meanwhile, cool air is blown to a user at the proper height where the range hood is located, good cooking experience is provided for the user, and the problem that the cooking temperature of the kitchen is high in summer is solved.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a range hood and a control method thereof. Background Art

[0002] As living standards improve, people have higher requirements for the comfort of their living environment. The kitchen is the main place for people to cook, and the quality of the kitchen air environment directly affects people's cooking experience. The kitchen is hot in summer and cold in winter, and has both cooling and heating needs. Based on this, it is extremely important to cool the kitchen air in summer and provide hot air to the kitchen in winter to improve cooking comfort.

[0003] However, there are currently two ways to cool down the kitchen in summer, one is to install a fan for cooling, and the other is to install an air conditioner for cooling. The fan type generally installs a fan on the range hood, but since the temperature in the kitchen is originally high, the wind blown by the fan cannot achieve a good cooling effect. Most air conditioning equipment is a split type of internal and external units, and the two need to be connected through pipes after opening holes in the wall. Not only is it difficult to install and maintain, but it also takes up a lot of space in the kitchen, which is already limited. Summary of the invention

[0004] Based on this, it is necessary to provide a range hood and a control method thereof to address the technical problem of insufficient comfort caused by high kitchen temperature.

[0005] A range hood, comprising:

[0006] The main body comprises an air inlet and an air outlet, wherein a cold air cavity is connected between the air inlet and the air outlet;

[0007] A cold air component disposed in the cold air chamber, and a refrigeration unit connected to the cold air component to form a circulating refrigeration circuit, wherein a cooling medium flows through the circulating refrigeration circuit and is used to cool the airflow sent from the air inlet into cold air and blow it out from the air outlet;

[0008] The heat dissipation unit arranged near the circulating refrigeration circuit is used to make the temperature of the cooling medium in the circulating refrigeration circuit lower than the set temperature.

[0009] In one embodiment, the cold air component includes a first fan and a sweeping blade, the first fan is arranged close to the air inlet, the sweeping blade is arranged close to the air outlet, and the sweeping blade is connected to the refrigeration unit to form a circulating refrigeration loop.

[0010] In one embodiment, the refrigeration unit includes a liquid storage device, a cooling medium output pipeline and a cooling medium return pipeline, the liquid storage device includes a liquid inlet and a liquid outlet, the liquid inlet is connected to the cooling medium return pipeline, the liquid outlet is connected to the cooling medium output pipeline, the cooling medium output pipeline and the cooling medium return pipeline are also connected to the wind sweeping blades to form the circulating refrigeration circuit.

[0011] In one embodiment, the wind sweeping blade is hollow inside, one end of which is connected to the cooling medium output pipeline, and the other end of which is connected to the cooling medium return pipeline.

[0012] In one of the embodiments, the heat dissipation unit includes a semiconductor refrigeration plate, and the cold end of the semiconductor refrigeration plate is arranged close to the cooling medium return pipeline.

[0013] In one of the embodiments, the heat dissipation unit further includes a second fan, and the second fan is disposed close to the cooling medium return pipeline.

[0014] In one embodiment, the cooling medium return pipeline includes a first return branch and a second return branch, the cold end of the semiconductor refrigeration plate is arranged close to the first return branch, and the second fan is arranged close to the second return branch.

[0015] In one embodiment, the liquid storage device is a liquid storage tank, and a heat-insulating shell is disposed outside the liquid storage tank.

[0016] In one embodiment, a range hood control method is provided, which is applied to the range hood described in any of the above embodiments, and the method includes:

[0017] Obtaining the range hood operating status of the range hood and the temperature of the cooling medium in the circulating refrigeration circuit;

[0018] When it is determined based on the range hood operating state and the cooling medium temperature that the heat dissipation start-up condition is met, the heat dissipation state of the heat dissipation unit is controlled to reduce the cooling medium temperature in the circulating refrigeration circuit.

[0019] In one embodiment, when it is determined based on the working state of the range hood and the temperature of the cooling medium that the start-up heat dissipation condition is met, controlling the heat dissipation state of the heat dissipation unit to reduce the temperature of the cooling medium in the circulating refrigeration circuit includes:

[0020] When the range hood is in the startup state, controlling the heat dissipation state to be in the startup state;

[0021] When the range hood operating state is switched from start-up to stop-operation, the heat dissipation unit is controlled to remain in start-up operation until the temperature of the cooling medium drops below a set temperature, and the heat dissipation state is controlled to switch to stop-operation.

[0022] In one embodiment, when it is determined based on the working state of the range hood and the temperature of the cooling medium that the start-up heat dissipation condition is met, controlling the heat dissipation state of the heat dissipation unit to reduce the temperature of the cooling medium in the circulating refrigeration circuit includes:

[0023] When the range hood is in the stopped state, if the temperature of the cooling medium is higher than the set temperature, the heat dissipation state is controlled to start working, until the temperature of the cooling medium drops below the set temperature, the heat dissipation state is controlled to switch to the stopped state.

[0024] In one embodiment, controlling the heat dissipation state to start operation includes:

[0025] Start the semiconductor cooling plate and the second fan to work together.

[0026] In one embodiment, the method further comprises:

[0027] When the range hood is in the start-up state and the indoor ambient temperature exceeds a preset temperature threshold, the first fan is started.

[0028] The range hood and its control method are as follows: the range hood body includes an air inlet and an air outlet, and a cold air cavity is connected between the air inlet and the air outlet. A cold air component is arranged in the cold air cavity, and a refrigeration unit is connected with the cold air component to form a circulating refrigeration circuit. A cooling medium flows in the circulating refrigeration circuit, which is used to cool the airflow sent into the air inlet into cold air and blow it out from the air outlet; a heat dissipation unit is arranged near the circulating refrigeration circuit, which is used to make the temperature of the cooling medium in the circulating refrigeration circuit lower than the set temperature. By adding a device that can blow out cold air in the internal space of the range hood, no additional kitchen space is occupied, and the added value of the existing range hood is increased. At the same time, cool air is blown to the user at a suitable height where the range hood is located, providing the user with a good cooking experience and solving the problem of high cooking temperature in the kitchen in summer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 is a schematic diagram of a system block diagram of a range hood in one embodiment;

[0031] Figure 2 is a schematic front view of a range hood in one embodiment;

[0032] Figure 3 is a schematic side view of a range hood in one embodiment;

[0033] Figure 4 is a flow chart of a range hood control method in one embodiment;

[0034] Figure 5 is a flow chart of a range hood control method in another embodiment;

[0035] Figure 6 is a flow chart of a range hood control method in yet another embodiment;

[0036] Figure 7 A schematic diagram of a flow chart of a range hood control method in yet another embodiment;

[0037] Figure 8 is a structural block diagram of a range hood control device in one embodiment;

[0038] Fig. 9 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. The embodiments of the present application are given in the accompanying drawings, but the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0040] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0041] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0042] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0043] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0045] In recent years, as people pay more and more attention to the living environment, they have higher requirements for the comfort of the living environment. Among them, the indoor environment has become the focus of people's attention. The kitchen is the main place for people to cook. More and more people are beginning to realize the adverse effects of kitchen smoke on the indoor environment. When cooking, the kitchen is full of hot air, oil smoke and grease, which pollute the kitchen environment. Especially in the hot summer, the kitchen is like a steamer, affecting the mood when cooking. Based on this, it is extremely important to cool the kitchen air in summer and provide hot air to the kitchen in winter to improve cooking comfort.

[0046] However, there are currently two ways to cool down the kitchen in summer, one is to install a fan for cooling, and the other is to install an air conditioner for cooling. The fan type generally installs a fan on the range hood, but since the temperature in the kitchen is originally high, the wind blown by the fan cannot achieve a good cooling effect. Most air conditioning equipment is a split type of internal and external units, and the two need to be connected through pipes after opening holes in the wall. Not only is it difficult to install and maintain, but it also takes up a lot of space in the kitchen, which is already limited.

[0047] Therefore, the present application increases the added value of the existing range hood by adding a device that can blow out cold air in the internal space of the range hood without occupying additional kitchen space. At the same time, cool air is blown to the user at a suitable height of the range hood, providing the user with a good cooking experience and solving the problem of high cooking temperature in the kitchen in summer.

[0048] In an exemplary embodiment, Figure 1As shown, a range hood is provided, comprising: a main body 1, comprising an air inlet 11 and an air outlet 12, wherein a cold air chamber 13 is connected between the air inlet 11 and the air outlet 12; a cold air component 2 arranged in the cold air chamber 13, and a refrigeration unit 3 connected to the cold air component 2 to form a circulating refrigeration circuit, wherein a cooling medium flows in the circulating refrigeration circuit, and is used for cooling the airflow delivered by the air inlet 11 into cold air, and blowing it out from the air outlet 12; a heat dissipation unit 4 arranged close to the circulating refrigeration circuit, and is used for making the temperature of the cooling medium in the circulating refrigeration circuit lower than a set temperature.

[0049] Specifically, the main body 1 can be understood as the outer shell of the range hood, on which an air inlet 11 and an air outlet 12 are provided, and a cold air chamber 13 is connected between the air inlet 11 and the air outlet 12. The air inlet 11 is used to introduce hot air from the environment, and cool the hot air in the cold air chamber 13 to become cold air, and then send the cold air to the environment through the air outlet 12, exchanging the hot air into cold air, so as to achieve cooling of the environment where the range hood is located.

[0050] The positions of the air inlet 11 and the air outlet 12 on the main body 1 of the range hood are not limited and can be determined according to actual technical requirements. For example, in this embodiment, the air outlet 12 can be set at a position facing the user, for example, referring to Figure 2 , can be set near the touch panel on the front side of the range hood to blow cool air to the user most directly. Further, based on the air circulation path of the kitchen space, the air inlet 11 can be set at the top or bottom of the range hood in this embodiment, and the hot air is sent into the cold air chamber 13 from the air inlet 11, and then sent out from the air outlet 12 on the front side after being cooled down to become cold air, so as to form a smooth air circulation path and improve the efficiency of cooling the environment.

[0051] In addition, the number of the air inlet 11 and the air outlet 12 is not limited, and can be one or more than two, or can be as follows: Figure 2 The row of long strip air vents shown can increase the air flow into the cold air chamber 13, and accordingly occupy less internal space of the range hood with the same heat exchange efficiency.

[0052] Furthermore, a cold air component 2 is provided in the cold air chamber 13. The cold air component 2 can first introduce hot air from the environment into the cold air chamber 13 through the air inlet 11. Then, since the cold air component 2 is connected to the refrigeration unit 3 to form a circulating refrigeration circuit, a cooling medium flows in the circulating refrigeration circuit. The cold air component 2 can also cool the airflow delivered from the air inlet 11 into cold air, and then deliver it to the environment through the air outlet 12.

[0053] The cold air assembly 2 includes a power device for introducing airflow into the cold air chamber 13, such as a fan, etc., and also needs to include a device that can be connected to the refrigeration unit 3 to form a circulating refrigeration loop to perform heat exchange on the introduced airflow, such as a heat exchange plate or a heat exchange pipeline, etc. In addition, the cold air assembly 2 may also include a device for sending cold air from the cold air chamber 13 to the environment, for example, a fan may be added, or an airflow guide device may be added.

[0054] The refrigeration unit 3 is a device that can form a circulating refrigeration loop to circulate the cooling medium, which can be connected by pipelines. A power device needs to be set on the pipeline to ensure the smooth circulation of the cooling medium. A container for storing the cooling medium can also be set between the pipelines. When the cold air blowing function of the range hood is not in use, the cooling medium can be stored in the container to save energy and reduce unnecessary energy consumption.

[0055] The specific cooling medium used is not fixed and can be set according to actual technical requirements. For example, the cooling medium can be water, salt water, alkaline water, or oil. It can also be a commonly used refrigerant, such as Freon, ammonia, and carbon dioxide.

[0056] Furthermore, since the refrigeration unit 3 is connected with the cold air component 2 to form a circulating refrigeration loop to perform heat exchange on the introduced airflow, the temperature of the cooling medium in the pipeline side where the exchange is completed must be relatively high. In order to ensure that the circulating refrigeration loop can continuously perform heat exchange on the introduced airflow, the airflow sent in from the air inlet 11 is cooled down into cold air, and a heat dissipation unit 4 is provided near the pipeline side where the exchange is completed in the circulating refrigeration loop, so that the temperature of the cooling medium in the circulating refrigeration loop is always kept lower than the set temperature, so as to achieve a better cold air blowing effect.

[0057] Furthermore, a temperature detection device can be arranged on the side of the pipe where the exchange is completed in the circulating refrigeration loop to detect the temperature of the cooling medium in the circulating refrigeration loop to realize the control of the heat dissipation unit 4. For example, after the range hood is started, it indicates that the user is cooking, and the heat dissipation unit 4 can be controlled to work continuously to reduce the temperature of the cooling medium in the circulating refrigeration loop and achieve a better effect of blowing cold air. When the working state of the range hood is switched from starting to stopping, it indicates that the user has just finished cooking, and the heat dissipation unit 4 can be controlled to continue working for a period of time until the temperature of the cooling medium drops below the set temperature. After the working state of the range hood is stopped, the heat dissipation component 4 needs to be intermittently controlled to start working to ensure that the temperature of the cooling medium is always maintained at the set temperature, so that the user can feel cool air when starting cooking, thereby improving the user experience.

[0058] It can be understood that the present application improves existing range hoods to solve the problem of high kitchen environment temperature, and thus the present application embodiment does not limit the type of range hood. Any range hood, as long as its internal space can be designed and the device part for blowing out cold air provided by the present application is added, can be applied to the present application solution to achieve blowing out cool air to the user.

[0059] It should be noted that since other functional modules of the range hood are not included in the contents of the embodiments of the present application, they will not be described in detail and can be designed according to the known technologies in the art.

[0060] The above-mentioned range hood has a main body including an air inlet and an air outlet, and a cold air cavity is connected between the air inlet and the air outlet. A cold air component is arranged in the cold air cavity, and a refrigeration unit is connected with the cold air component to form a circulating refrigeration circuit. A cooling medium flows in the circulating refrigeration circuit, which is used to cool the airflow sent into the air inlet into cold air and blow it out from the air outlet; a heat dissipation unit is arranged near the circulating refrigeration circuit, which is used to make the temperature of the cooling medium in the circulating refrigeration circuit lower than the set temperature. By adding a device that can blow out cold air in the internal space of the range hood, no additional kitchen space is occupied, and the added value of the existing range hood is increased. At the same time, cool air is blown to the user at a suitable height where the range hood is located, providing the user with a good cooking experience and solving the problem of high cooking temperature in the kitchen in summer.

[0061] In an exemplary embodiment, Figure 3 As shown, the cold air assembly 2 includes a first fan 21 and a sweeping blade 22. The first fan 21 is arranged close to the air inlet 11, and the sweeping blade 22 is arranged close to the air outlet 12. The sweeping blade 22 is connected to the refrigeration unit 3 to form a circulating refrigeration loop.

[0062] Specifically, the first fan 21 is disposed close to the air inlet 11 , and is used to introduce hot air from the surrounding environment into the cold air chamber 13 through the air inlet 11 .

[0063] Exemplarily, the first fan 21 may be implemented as a swirl fan to more efficiently introduce hot air into the environment.

[0064] In addition, an oil adsorption device can be provided at the air inlet 11 to remove oil fume molecules in the hot air of the kitchen environment introduced by the first fan 21. This can avoid the phenomenon that the surface of the first fan 21 and the sweeping blades 22 in the cold air chamber 13 are covered with grease, avoid the problem of poor cold air effect due to corrosion of the device, increase the service life of the components, and reduce the frequency of regular cleaning of the components.

[0065] Furthermore, the sweeping blades 22 are arranged close to the air outlet 12, and are connected to the refrigeration unit 3 to form a circulating refrigeration loop, so that the hot air is cooled in the cold air chamber 13 into cold air, and the cold air is then sent to the environment through the air outlet 12, exchanging the hot air into cold air, thereby achieving cooling of the environment where the range hood is located.

[0066] Among them, the way to connect the sweeping blade 22 with the refrigeration unit 3 to form a circulating refrigeration circuit can be to set a heat exchange plate or a heat exchange pipeline on the sweeping blade 22, or to set the sweeping blade 22 to be hollow inside and then pass a heat exchange pipeline inside it, or to directly use the hollow sweeping blade 22 as a heat exchange pipeline and connect it to the refrigeration unit 3 to form a circulating refrigeration circuit.

[0067] In an exemplary embodiment, Figure 3 As shown, the refrigeration unit 3 includes a liquid storage device 31, a cooling medium output pipeline 32 and a cooling medium return pipeline 33. The liquid storage device 31 includes a liquid inlet and a liquid outlet. The liquid inlet is connected to the cooling medium return pipeline 33, and the liquid outlet is connected to the cooling medium output pipeline 32. The cooling medium output pipeline 32 and the cooling medium return pipeline 33 are also connected to the wind sweeping blades 22 to form a circulating refrigeration circuit.

[0068] Specifically, the liquid storage device 31 is used to store the cooling medium that is not circulated in the pipeline, and includes a liquid inlet and a liquid outlet. The liquid inlet is used to receive the cooling medium that has completed the heat exchange, and the liquid outlet is used to output the cooling medium that is ready for heat exchange.

[0069] Furthermore, the cooling medium output pipeline 32 is connected to the liquid outlet, and is used to output the cooling medium stored in the liquid storage device 31 and ready for heat exchange to the wind sweeping blade 22 for heat exchange with the hot air introduced into the cold air chamber 13. The cooling medium return pipeline 33 is connected to the liquid inlet, and is used to return the cooling medium after heat exchange to the liquid storage device 31.

[0070] The specific form of the liquid storage device 31 is not limited, and it can be a box form, a tank form, or a trough form.

[0071] In an exemplary embodiment, Figure 3 As shown, the liquid storage device 31 is a liquid storage tank, and a heat-insulating shell is arranged outside the liquid storage tank.

[0072] Specifically, this embodiment uses a liquid storage tank to store the cooling medium that is not circulated in the pipeline. The liquid storage tank can be configured as a multi-layer, for example, it may include an inner liner and an outer protective layer, and the inner liner may be made of metal material, which is convenient for connection with the cooling medium output pipeline 32 and the cooling medium return pipeline 33. For example, the liquid storage tank may use an aluminum inner liner, because aluminum materials have low cost, obvious heat transfer effect, and an oxide protective film on the surface, etc., which meets the design and use requirements. At the same time, the liquid storage tank can be provided with an insulating shell on the outside to effectively ensure that the temperature of the cooling medium stored inside is maintained at the set temperature.

[0073] In an exemplary embodiment, Figure 3 As shown, the interior of the wind sweeping blade 22 is hollow, one end of which is connected to the cooling medium output pipeline 32 , and the other end of which is connected to the cooling medium return pipeline 33 .

[0074] Specifically, the interior of the air sweeping blade 22 is hollow, one end of which is connected to the cooling medium output pipeline 32, and the other end of which is connected to the cooling medium return pipeline 33, so as to form a circulating refrigeration loop. The present application adopts the air sweeping blade 22 to directly connect with the pipelines at both ends to form a circulating refrigeration loop, which can ensure the maximum heat exchange with the hot air introduced into the cold air chamber 13, thereby improving the efficiency of cooling the kitchen environment.

[0075] Furthermore, the wind sweeping blades 22 may be made of a material with good heat transfer effect to further ensure the heat exchange efficiency and the temperature of the blown cold air.

[0076] In an exemplary embodiment, Figure 3 As shown, the heat dissipation unit 4 includes a semiconductor refrigeration sheet 41 , and the cold end of the semiconductor refrigeration sheet 41 is arranged close to the cooling medium return pipeline 33 .

[0077] Among them, the semiconductor cooling sheet 41 is composed of N-type semiconductor material and P-type semiconductor material. When these two materials are connected into an electric couple and a direct current is connected in the circuit, energy transfer can be generated. When the current flows from the N-type element to the joint of the P-type element, it absorbs heat to form a cold end; and when the current flows from the P-type element to the joint of the N-type element, it releases heat to form a hot end. Among them, heat is transferred from the cold end to the hot end, thereby achieving a cooling effect. The amount of heat absorption and heat release is determined by the amount of current flowing through it and the number of element pairs of semiconductor materials N and P. In addition, the interior of the semiconductor cooling sheet 41 is composed of hundreds of pairs of thermoelectric piles connected by electric couplings to achieve an enhanced cooling effect.

[0078] Specifically, during the heat exchange process of the circulating refrigeration circuit on the introduced airflow, the temperature of the cooling medium in the cooling medium return pipe 33, which is the side of the pipe where the exchange is completed, must be relatively high. In order to ensure that the circulating refrigeration circuit can continuously perform heat exchange on the introduced airflow and cool the airflow sent in from the air inlet 11 into cold air, a heat dissipation unit 4 needs to be arranged near the cooling medium return pipe 33 so that the temperature of the cooling medium in the circulating refrigeration circuit is always kept lower than the set temperature, so as to achieve a better effect of blowing cold air.

[0079] Furthermore, in this embodiment, the cold end of the semiconductor refrigeration plate 41 can be arranged close to the cooling medium return pipeline 33, so that the temperature of the cooling medium in the circulating refrigeration loop is always kept lower than the set temperature.

[0080] It can be understood that in order to achieve the cold end of the semiconductor refrigeration plate 41 close to the cooling medium return pipe 33, it is necessary to control the flow direction of the current in the semiconductor refrigeration plate 41, that is, it is necessary to set the circuit connection relationship, or control the polarity of the DC current flowing through it, to ensure that the current flows from the N-type element to the joint of the P-type element, so as to ensure a better heat dissipation effect.

[0081] In an exemplary embodiment, Figure 3 As shown, the heat dissipation unit 4 further includes a second fan 42 , and the second fan 42 is disposed close to the cooling medium return pipeline 33 .

[0082] It can be understood that when the temperature difference between the hot and cold ends of the semiconductor cooling plate 41 reaches a certain level, when the amount of forward and reverse heat transfer is equal, a balance point will be reached, and the temperature of the hot and cold ends will not continue to change. In order to achieve a lower temperature, the temperature of the hot end can be reduced by heat dissipation.

[0083] Furthermore, in order to further enhance the heat dissipation effect of the cooling medium return pipeline 33 and ensure that the temperature of the cooling medium in the circulating refrigeration loop is always kept lower than the set temperature, a second fan 42 can be added on the basis of the semiconductor refrigeration plate 41 to dissipate heat.

[0084] The second fan 42 may be implemented by a cross-flow fan or a micro fan.

[0085] In addition, the positional relationship between the semiconductor cooling sheet 41 and the second fan 42 relative to the cooling medium return pipeline 33 is not limited. Both of them can be arranged on the same side of the cooling medium return pipeline 33, and both of them can be arranged near the front and rear pipe sections of the cooling medium return pipeline 33, or both of them can be arranged on opposite sides of the cooling medium return pipeline 33. In other embodiments, the semiconductor cooling sheet 41 can be arranged near the cooling medium return pipeline 33, and the second fan 42 can be arranged near the semiconductor cooling sheet 41, so as to further cool the semiconductor cooling sheet 41.

[0086] In an exemplary embodiment, Figure 3 As shown, the cooling medium return pipeline 33 includes a first return branch 331 and a second return branch 332 , the cold end of the semiconductor cooling plate 41 is arranged close to the first return branch 331 , and the second fan 42 is arranged close to the second return branch 332 .

[0087] Specifically, the cooling medium return pipeline 33 may be divided into two branches, namely a first return branch 331 and a second return branch 332 , and then a semiconductor cooling sheet 41 and a second fan 42 are respectively used to dissipate heat and cool down the cooling medium in the two branches.

[0088] It is understood that the cooling medium return pipe 33 may be made of a metal material with good heat exchange effect to ensure that the returning cooling medium achieves a good cooling effect. The liquid storage tank and the cooling medium output pipe 32 may be made of a material with good thermal insulation effect, or an insulation layer may be added on the outside to reduce heat loss before heat exchange.

[0089] For example, the range hood may further include a controller. The controller may be connected to the first fan, the semiconductor cooling sheet, and the second fan to control the operation of the above components. Of course, the controller may also be connected to other components in the range hood to control the operation status of each component in the range hood.

[0090] It can be understood that the controller is the control center of the range hood, which can be a control chip or control circuit board set in the range hood body, or an external control system based on wireless communication. The external control system can be implemented through devices such as terminals or servers. The terminals can be, but are not limited to, various personal computers, smart phones, tablet computers, Internet of Things devices and portable wearable devices. Internet of Things devices can be smart speakers, smart car devices, etc. Portable wearable devices can be smart watches, smart bracelets, etc. The server can be implemented as an independent server or a server cluster consisting of multiple servers.

[0091] In combination with the above embodiments, in an exemplary embodiment, Figure 4 As shown, a range hood control method is provided, which is used to control the range hood of any of the above embodiments, and can be specifically applied to the controller of the range hood. The method includes steps 202 to 204, wherein:

[0092] Step 202, obtaining the range hood operating state of the range hood and the temperature of the cooling medium in the circulating refrigeration loop.

[0093] Specifically, the range hood operating state indicates whether the range hood is currently in operation, and can also indirectly indicate whether the user is cooking. The range hood operating state can be determined by whether the range hood exhaust fan is working, whether the first fan is working, or whether the user issues an operation instruction.

[0094] Furthermore, the temperature of the cooling medium in the circulating refrigeration loop specifically represents the temperature of the cooling medium in the pipeline side where the heat exchange of the circulating refrigeration loop is completed, and can be obtained by setting a temperature detection device near the pipeline side where the heat exchange is completed in the circulating refrigeration loop.

[0095] Step 204, when it is determined based on the range hood operating state and the cooling medium temperature that the heat dissipation start condition is met, the heat dissipation state of the heat dissipation unit is controlled to reduce the temperature of the cooling medium in the circulating refrigeration loop.

[0096] It can be understood that since the refrigeration unit is connected with the cold air component to form a circulating refrigeration loop to perform heat exchange on the introduced airflow, the temperature of the cooling medium in the pipeline side where the exchange is completed must be high. In order to ensure that the circulating refrigeration loop can continuously perform heat exchange on the introduced airflow and cool the airflow sent into the air inlet into cold air, a heat dissipation unit needs to be set near the pipeline side where the exchange is completed in the circulating refrigeration loop, so that the temperature of the cooling medium in the circulating refrigeration loop is always kept lower than the set temperature, so as to achieve a better cold air blowing effect.

[0097] Specifically, the heat dissipation state of the heat dissipation unit can be controlled based on the working state of the range hood and the temperature of the cooling medium to determine whether the heat dissipation conditions are met, so as to reduce the temperature of the cooling medium in the circulating refrigeration loop. For example, when the working state of the range hood indicates that the range hood is started, it indicates that the user is cooking, and the heat dissipation unit can be controlled to work continuously to reduce the temperature of the cooling medium in the circulating refrigeration loop and achieve a better effect of blowing cold air. When the working state of the range hood is switched from starting to stopping, it indicates that the user has just finished cooking, and the heat dissipation unit can be controlled to continue working for a period of time until the temperature of the cooling medium drops below the set temperature. After the working state of the range hood is stopped, the heat dissipation component must also be intermittently controlled to start working to ensure that the temperature of the cooling medium is always maintained at the set temperature, so that the user can get cool air when he starts cooking, thereby improving the user experience.

[0098] In an exemplary embodiment, Figure 5 As shown, step 204 includes the following steps 302 to 304, wherein:

[0099] Step 302, when the range hood operating state is the start-up state, control the heat dissipation state to the start-up state.

[0100] It can be understood that the range hood is in the starting state, which means that the user has been cooking continuously and the range hood has been absorbing oil fumes. At this time, the kitchen environment temperature should still be relatively high and cold air needs to be continuously blown out to cool down.

[0101] Specifically, in the state of continuously blowing cold air to cool down, in order to ensure that the temperature of the cooling medium in the circulating refrigeration loop meets the heat exchange requirements, the heat dissipation state of the heat dissipation unit needs to be kept continuously in the startup state, and the cooling medium in the cooling medium return pipeline is cooled down, so that the temperature of the cooling medium in the circulating refrigeration loop is always kept lower than the set temperature, so as to achieve a better cold air blowing effect.

[0102] Step 304, when the range hood operating state is switched from start-up to stop-operation, the heat dissipation unit is controlled to remain in start-up operation until the temperature of the cooling medium drops below the set temperature, and the heat dissipation state is controlled to switch to stop-operation.

[0103] It can be understood that the range hood's working state switches from starting to stopping, indicating that the user has just finished cooking, and the cold air blowing may also have just ended at this time.

[0104] Specifically, when the cold air has just been blown, the temperature of the cooling medium in the cooling medium return pipeline may still be relatively high and not below the preset temperature. In this way, after returning to the liquid storage tank, the temperature of the cooling medium in the liquid storage tank may be raised. In this state, the heat dissipation unit needs to be controlled to start working until the temperature of the cooling medium drops below the set temperature, and then the heat dissipation state is switched to stop working. This can also ensure that the temperature of the cooling medium in the circulating refrigeration loop is always kept below the set temperature. The next time the user turns on the first fan, cool cold air can be blown out, which can also improve the user experience.

[0105] In an exemplary embodiment, referring to Figure 5 , step 204 also includes step 306, wherein:

[0106] Step 306, when the range hood is in the stopped state, if the temperature of the cooling medium is higher than the set temperature, the heat dissipation state is controlled to start working, until the temperature of the cooling medium drops below the set temperature, the heat dissipation state is controlled to switch to the stopped state.

[0107] Specifically, the range hood is in the stopped state, that is, the user is not cooking. In this state, the temperature of the cooling medium in the circulating refrigeration loop can be continuously monitored, and when it is higher than the set temperature, the heat dissipation unit is controlled to start working until the cooling medium temperature drops below the set temperature, and then the heat dissipation state is controlled to switch to the stopped state.

[0108] In this embodiment, when the range hood is not working, real-time monitoring is performed to ensure that the temperature of the cooling medium in the circulating refrigeration loop is always kept below the set temperature, so that the user can turn on the range hood to blow out cool air, thereby improving the user experience.

[0109] In other embodiments, in order to reduce energy consumption, the temperature of the cooling medium in the circulating refrigeration circuit can be monitored and cooled intermittently when the range hood is in the stopped state. For example, after the range hood is in the stopped state, the temperature of the cooling medium in the circulating refrigeration circuit can be monitored at intervals of a preset time, and then when the temperature of the cooling medium is higher than the set temperature, the heat dissipation state is controlled to start working, until the temperature of the cooling medium drops below the set temperature, and the heat dissipation state is controlled to switch to stop working. The preset time can be freely set according to user needs.

[0110] In addition, it is also possible to learn and analyze the user's habit of using the range hood, or to obtain the user's common time periods for using the range hood according to the user's own settings, such as regular cooking time periods such as morning, noon and evening, and monitor and cool the temperature of the cooling medium in the circulating refrigeration circuit. For example, after the range hood is in the stopped state, when the preset time point is reached, the cooling medium temperature in the circulating refrigeration circuit is monitored, and then when the cooling medium temperature is higher than the set temperature, the heat dissipation state is controlled to start working until the cooling medium temperature drops below the set temperature, and the heat dissipation state is controlled to switch to stop working. Among them, the preset time point can be a time point that is a preset time ahead of the regular cooking time period, and the preset time length is set to ensure that the cooling medium temperature can be cooled to below the set temperature. For example, if the user's common time period is from 8 to 9 in the morning, and the device needs about half an hour to cool down, the preset time point can be set to 7:30.

[0111] In an exemplary embodiment, controlling the heat dissipation state to start operation includes: starting the semiconductor cooling plate and the second fan to work together. Specifically, when the range hood includes two heat dissipation components, the semiconductor cooling plate and the second fan, both need to be controlled to work simultaneously to ensure the best heat dissipation effect.

[0112] In one of the embodiments, the method further includes: when the range hood is in the start-up state and the indoor ambient temperature exceeds a preset temperature threshold, starting the first fan.

[0113] It can be understood that controlling whether the first fan is started means controlling whether cold air is blown to the user. Specifically, when the range hood is in the started state and the indoor ambient temperature exceeds a preset temperature threshold, the first fan is started to blow cold air to the user.

[0114] In a specific embodiment, a range hood is provided, which is mainly composed of a first fan, a sweeping blade, a second fan, a semiconductor refrigeration sheet and a liquid storage tank. The liquid storage tank stores a cooling medium, which is cooled by the second fan and the semiconductor refrigeration sheet, and the liquid storage tank has a heat preservation effect. In the range hood, a circulating refrigeration circuit is provided between the liquid storage tank and the sweeping blade, which can circulate the cooling medium in the liquid storage tank to the sweeping blade. The wind flow blown out by the wind wheel in the first fan passes through the sweeping blade (the sweeping blade is at a low temperature at this time) to cool the air and blow it toward the user, thereby achieving a cooling effect. The second fan and the semiconductor refrigeration sheet work together to cool the cooling medium, and the semiconductor refrigeration sheet has a better cooling effect, the purpose of which is to reduce the temperature to a lower level. The cooling is faster when both work at the same time.

[0115] like Figure 6 and Figure 7 The figure shows the working principle flow chart of the above-mentioned range hood. Specifically, when the user is not cooking (not operating the range hood), the second fan and the semiconductor refrigeration sheet work together to cool down the cooling medium. When the temperature reaches the user's set temperature, the second fan and the semiconductor refrigeration sheet stop working and circulate back and forth. When the user turns on the first fan, the second fan and the semiconductor refrigeration sheet work at the same time, and the cooling medium in the liquid storage tank circulates to the wind sweeping blades through the circulating refrigeration circuit. When the user turns off the first fan, the second fan and the semiconductor refrigeration sheet continue to work until the cooling medium reaches the preset temperature. When the cooling medium reaches the temperature, the second fan and the semiconductor refrigeration sheet are turned off, and the working process ends here.

[0116] In this embodiment, semiconductor refrigeration and fans are used to cool the cooling medium in advance. When the user turns on the first fan for cooling while cooking, the cooling medium circulates in the circulating refrigeration loop, and the sweeping blades blow the cold air in the cooling medium toward the user, thereby achieving a cooling effect.

[0117] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0118] Based on the same inventive concept, the embodiment of the present application also provides a range hood control device for implementing the range hood control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more range hood control device embodiments provided below can refer to the limitations of the range hood control method above, and will not be repeated here.

[0119] In an exemplary embodiment, Figure 8 As shown, a range hood control device is provided, comprising: an acquisition module 101 and a control module 102, wherein:

[0120] The acquisition module 101 is used to acquire the range hood operating state of the range hood and the temperature of the cooling medium in the circulating refrigeration loop;

[0121] The control module 102 is used to control the heat dissipation state of the heat dissipation unit to reduce the temperature of the cooling medium in the circulating refrigeration loop when it is determined that the heat dissipation start condition is met based on the working state of the range hood and the temperature of the cooling medium.

[0122] In an exemplary embodiment, the control module 102 is also used to control the heat dissipation state to be started when the range hood operating state is started; when the range hood operating state is switched from started to stopped, the heat dissipation unit is controlled to remain started until the temperature of the cooling medium drops below the set temperature, and the heat dissipation state is switched to stopped; when the range hood operating state is stopped but the temperature of the cooling medium is higher than the set temperature, the heat dissipation state is controlled to be started until the temperature of the cooling medium drops below the set temperature, and the heat dissipation state is switched to stopped.

[0123] In an exemplary embodiment, the control module 102 is also used to control the semiconductor refrigeration plate and the second fan to start working together when the working state of the range hood is started; when the working state of the range hood switches from started working to stopped working, the semiconductor refrigeration plate and the second fan are controlled to remain started working until the temperature of the cooling medium drops below the set temperature, and the semiconductor refrigeration plate and the second fan are controlled to switch to stopped working; when the working state of the range hood is stopped working but the temperature of the cooling medium is higher than the set temperature, the semiconductor refrigeration plate and the second fan are controlled to start working together until the temperature of the cooling medium drops below the set temperature, and the semiconductor refrigeration plate and the second fan are controlled to switch to stopped working.

[0124] In an exemplary embodiment, the control module 102 is further configured to start the first fan when the range hood is in the start-up state and the indoor ambient temperature exceeds a preset temperature threshold.

[0125] Each module in the range hood control device can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0126] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Fig. 9 As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a range hood control method is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0127] Those skilled in the art will understand that Fig. 9 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0128] In an exemplary embodiment, a computer device is provided, wherein a computer program is stored in a memory, and the processor implements the steps of the above-mentioned range hood control method when executing the computer program.

[0129] In an exemplary embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned range hood control method are implemented.

[0130] In an exemplary embodiment, a computer program product is provided, including a computer program, which implements the steps of the above range hood control method when executed by a processor.

[0131] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0132] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0133] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A range hood, characterized in that: The range hood comprises: The main body comprises an air inlet and an air outlet, wherein a cold air cavity is connected between the air inlet and the air outlet; A cold air component disposed in the cold air chamber, and a refrigeration unit connected to the cold air component to form a circulating refrigeration circuit, wherein a cooling medium flows through the circulating refrigeration circuit and is used to cool the airflow sent from the air inlet into cold air and blow it out from the air outlet; The heat dissipation unit arranged near the circulating refrigeration circuit is used to make the temperature of the cooling medium in the circulating refrigeration circuit lower than the set temperature.

2. The range hood according to claim 1, characterized in that: The cold air component includes a first fan and a sweeping blade. The first fan is arranged close to the air inlet, and the sweeping blade is arranged close to the air outlet. The sweeping blade is connected to the refrigeration unit to form a circulating refrigeration loop.

3. The range hood according to claim 2, characterized in that: The refrigeration unit includes a liquid storage device, a cooling medium output pipeline and a cooling medium return pipeline. The liquid storage device includes a liquid inlet and a liquid outlet. The liquid inlet is connected to the cooling medium return pipeline, and the liquid outlet is connected to the cooling medium output pipeline. The cooling medium output pipeline and the cooling medium return pipeline are also connected to the wind sweeping blades to form the circulating refrigeration circuit.

4. The range hood according to claim 3, characterized in that: The wind sweeping blade is hollow inside, one end of which is connected to the cooling medium output pipeline, and the other end of which is connected to the cooling medium return pipeline.

5. The range hood according to claim 3, characterized in that: The heat dissipation unit includes a semiconductor refrigeration plate, and the cold end of the semiconductor refrigeration plate is arranged close to the cooling medium return pipeline.

6. The range hood according to claim 5, characterized in that: The heat dissipation unit further includes a second fan, and the second fan is arranged close to the cooling medium return pipeline.

7. The range hood according to claim 6, characterized in that: The cooling medium return pipeline includes a first return branch and a second return branch. The cold end of the semiconductor refrigeration plate is arranged close to the first return branch, and the second fan is arranged close to the second return branch.

8. The range hood according to claim 3, characterized in that: The liquid storage device is a liquid storage tank, and a heat-insulating shell is arranged outside the liquid storage tank.

9. A range hood control method, applied to the range hood according to any one of claims 1 to 8, characterized in that: The method comprises: Obtaining the range hood operating status of the range hood and the temperature of the cooling medium in the circulating refrigeration circuit; When it is determined based on the range hood operating state and the cooling medium temperature that the heat dissipation start-up condition is met, the heat dissipation state of the heat dissipation unit is controlled to reduce the cooling medium temperature in the circulating refrigeration circuit.

10. The range hood control method according to claim 9, characterized in that: When it is determined based on the working state of the range hood and the temperature of the cooling medium that the start-up heat dissipation condition is met, controlling the heat dissipation state of the heat dissipation unit to reduce the temperature of the cooling medium in the circulating refrigeration circuit includes: When the range hood is in the startup state, controlling the heat dissipation state to be in the startup state; When the range hood operating state is switched from start-up to stop-operation, the heat dissipation unit is controlled to remain in start-up operation until the temperature of the cooling medium drops below a set temperature, and the heat dissipation state is controlled to switch to stop-operation.

11. The range hood control method according to claim 9, characterized in that: When it is determined based on the working state of the range hood and the temperature of the cooling medium that the start-up heat dissipation condition is met, controlling the heat dissipation state of the heat dissipation unit to reduce the temperature of the cooling medium in the circulating refrigeration circuit includes: When the range hood is in the stopped state, if the temperature of the cooling medium is higher than the set temperature, the heat dissipation state is controlled to start working, until the temperature of the cooling medium drops below the set temperature, the heat dissipation state is controlled to switch to the stopped state.

12. The range hood control method according to claim 10 or 11, characterized in that: Controlling the heat dissipation state to start working includes: Start the semiconductor cooling plate and the second fan to work together.

13. The range hood control method according to any one of claims 9 to 11, characterized in that: The method further comprises: When the range hood is in the start-up state and the indoor ambient temperature exceeds a preset temperature threshold, the first fan is started.

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