Range hood

Abstract

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, in particular to a range hood. BACKGROUND

[0002] With the improvement of living standards, people have higher requirements for the comfort of living environment. The kitchen is the main place for people to cook, and the air environment of the kitchen directly affects the cooking experience of people. The kitchen is hot in summer and cold in winter, and has the demand of cooling and heating. Therefore, it is extremely important to cool the kitchen air in summer and provide hot air to the kitchen in winter to improve the cooking comfort.

[0003] However, there are two ways to cool the kitchen in summer at present, one is to install a fan for cooling, and the other is to install an air conditioner for cooling. The fan type is generally to install a fan on the range hood, but since the air temperature in the kitchen is already high, the wind blown by the fan cannot achieve good cooling effect. The air conditioner equipment is mostly split type, and the two need to be connected through pipeline after the wall is holed, which not only makes installation and maintenance difficult, but also occupies a large space in the kitchen which is already limited. CONTENT OF THE INVENTION

[0004] Therefore, it is necessary to provide a range hood for the technical problem that the high temperature of the kitchen leads to insufficient comfort.

[0005] A range hood, comprising:

[0006] A main body comprising an air inlet and an air outlet, a cold air cavity being communicated between the air inlet and the air outlet;

[0007] A cold air assembly arranged in the cold air cavity, and a refrigeration unit connected with the cold air assembly to form a circulating refrigeration circuit, a cooling medium being circulated in the circulating refrigeration circuit to cool the air flow entering the air inlet into cold air and blow out from the air outlet;

[0008] A heat dissipation unit arranged close to the circulating refrigeration circuit to make the temperature of the cooling medium in the circulating refrigeration circuit lower than a set temperature.

[0009] In one embodiment, the cold air assembly comprises 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 with the refrigeration unit to form a circulating refrigeration circuit.

[0010] In one of the embodiments, the refrigeration unit comprises a liquid storage device, a cooling medium output pipeline and a cooling medium return pipeline, the liquid storage device comprises a liquid inlet and a liquid outlet, the liquid inlet is communicated with the cooling medium return pipeline, the liquid outlet is communicated with the cooling medium output pipeline, and the cooling medium output pipeline and the cooling medium return pipeline are further communicated with the air sweeping blade to form the circulating refrigeration circuit.

[0011] In one of the embodiments, the air sweeping blade is hollow inside, one end of the air sweeping blade is communicated with the cooling medium output pipeline, and the other end of the air sweeping blade is communicated with the cooling medium return pipeline.

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

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

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

[0015] In one of the embodiments, the liquid storage device is a liquid storage tank, and a heat preservation shell is arranged outside the liquid storage tank.

[0016] In one of the embodiments, the air inlet is arranged at the top or the bottom of the range hood, and the air outlet is arranged at the control panel of the range hood.

[0017] In one of the embodiments, an oil adsorption device is arranged inside the air inlet.

[0018] The range hood described above, the range hood body comprises an air inlet and an air outlet, and a cold air cavity is communicated between the air inlet and the air outlet. A cold air assembly arranged in the cold air cavity, and a refrigeration unit connected with the cold air assembly to form a circulating refrigeration circuit, cooling medium flows in the circulating refrigeration circuit, which is used to cool the air current sent by the air inlet into cold air and blow out from the air outlet; a heat dissipation unit arranged close to the circulating refrigeration circuit is used to make the temperature of the cooling medium in the circulating refrigeration circuit lower than a set temperature. By adding the device that can blow out cold air in the internal space of the range hood, the additional value of the existing range hood is increased without occupying the kitchen space, and at the same time, the user is blown with cool air at a suitable height of the range hood, which provides a good cooking experience for the user and solves the problem of high cooking temperature in the kitchen in summer. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the related art. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 System block diagram of the range hood in an embodiment;

[0021] Figure 2 Front view diagram of the range hood in an embodiment;

[0022] Figure 3 Side view diagram of the range hood in an embodiment;

[0023] Figure 4 Flow diagram of the control method of the range hood in an embodiment;

[0024] Figure 5 Flow diagram of the control method of the range hood in another embodiment. DETAILED DESCRIPTION

[0025] In order to make the purposes, technical solutions and advantages of the present application clearer, the following will further describe the present application in detail with reference to the drawings and embodiments. The embodiments of the present application are shown in the drawings, but the present application can be realized 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 used to limit the present application.

[0026] It can be understood that the terms "first", "second", and the like used herein can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. For example, without departing from the scope of the present application, the first resistor can be referred to as the second resistor, and similarly, the second resistor can be referred to as the first resistor. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0027] It can be understood that "connection" in the following embodiments means that the circuits, modules, units, etc. connected to each other have the transmission of electrical signals or data.

[0028] It can be understood that "at least one" means one or more, and "multiple" means two or more. "At least part of the element" means part or all of the element.

[0029] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", or the like, when used in this specification, specify the presence of stated features, integers, steps, operations, components, parts, or the like, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or the like.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0031] In recent years, as people pay more and more attention to the living environment, there is a higher requirement for the comfort of the living environment. Among them, the indoor environment has become the focus of people's attention, and the kitchen is the main place for people to cook. More and more people begin to realize the adverse effects of kitchen fumes on the indoor environment. When cooking, the kitchen is full of hot air, oil smoke and oil, polluting the kitchen environment, especially in 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 the cooking comfort.

[0032] However, there are two ways to cool the kitchen in summer at present, one is to install a fan for cooling, and the other is to install an air conditioner for cooling. The fan type is generally to install a fan on the range hood, but since the air temperature in the kitchen is already high, the wind blown by the fan cannot achieve good cooling effect. Most air conditioning equipment is of split type, and the two need to be connected through pipeline after the wall surface is holed, which not only makes installation and maintenance difficult, but also occupies a large space in the kitchen which is originally limited in space.

[0033] Therefore, the present application increases the device that can blow out cold air in the internal space of the range hood, does not occupy the kitchen space, increases the additional value of the existing range hood, and blows out cool wind to the user at a suitable height of the range hood, providing a good cooking experience for the user, solving the problem of high temperature in the kitchen in summer.

[0034] In one exemplary embodiment, as Figure 1As shown, an extractor hood is provided, comprising: a main body 1 comprising an air inlet 11 and an air outlet 12, the air inlet 11 and the air outlet 12 being communicated with a cold air cavity 13; a cold air assembly 2 arranged in the cold air cavity 13, and a refrigeration unit 3 connected with the cold air assembly 2 to form a circulating refrigeration circuit, cooling medium flowing in the circulating refrigeration circuit to cool the air flow entering the air inlet 11 into cold air and blow out from the air outlet 12; and a heat dissipation unit 4 arranged close to the circulating refrigeration circuit to make the temperature of the cooling medium in the circulating refrigeration circuit lower than a set temperature.

[0035] Specifically, the main body 1 can be understood as the outer shell of the extractor hood, in which the air inlet 11 and the air outlet 12 are arranged, and the air inlet 11 and the air outlet 12 are communicated with the cold air cavity 13. The air inlet 11 is used to introduce the hot air in the environment, and the hot air is cooled and cooled into cold air in the cold air cavity 13, and then the cold air is sent out to the environment through the air outlet 12, so that the hot air is exchanged into cold air, and the temperature of the environment where the extractor hood is located is lowered.

[0036] The positions of the air inlet 11 and the air outlet 12 arranged on the main body 1 of the extractor hood are not limited, and can be determined according to actual technical requirements. For example, the air outlet 12 of the present embodiment can be arranged at a position facing the user, for example, referring to Figure 2 , it can be arranged near the touch panel on the front side of the extractor hood to directly blow cool air to the user. Further, based on the air circulation path of the kitchen space, the air inlet 11 of the present embodiment can be arranged at the top or bottom of the extractor hood, the hot air entering the cold air cavity 13 from the air inlet 11 is cooled and cooled into cold air and then sent out from the air outlet 12 on the front side to form a smooth air circulation path, thereby improving the efficiency of cooling the environment.

[0037] In addition, the number of air inlets 11 and air outlets 12 is not limited, which can be one or more than two, and can also be a long strip-shaped air inlet as Figure 2 shown, which can increase the air flow into the cold air cavity 13, and correspondingly can occupy less internal space of the extractor hood under the same heat exchange efficiency.

[0038] Further, the cold air assembly 2 is arranged in the cold air cavity 13, which first introduces the hot air in the environment into the cold air cavity 13 through the air inlet 11, and then the cold air assembly 2 is connected with the refrigeration unit 3 to form a circulating refrigeration circuit, cooling medium flows in the circulating refrigeration circuit, and then the cold air assembly 2 further cools the air flow entering the air inlet 11 into cold air and sends it out to the environment through the air outlet 12.

[0039] The cold air assembly 2 comprises a power device such as a fan for introducing air flow into the cold air cavity 13, and a device such as heat exchange fins or heat exchange pipelines for connecting with the refrigeration unit 3 to form a circulating refrigeration circuit to exchange heat with the introduced air flow. In addition, the cold air assembly 2 can further comprise a device such as a fan or an air flow guiding device for sending cold air from the cold air cavity 13 to the environment.

[0040] The refrigeration unit 3 is a device for forming a circulating refrigeration circuit to circulate cooling medium, which can be connected by pipelines, and a power device is arranged on the pipelines to ensure the smooth circulation of the cooling medium. Containers for storing the cooling medium can also be arranged between the pipelines, so that the cooling medium can be stored in the containers when the hood is not used to blow cold air, thereby saving energy and reducing unnecessary energy consumption.

[0041] 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, brine or lye, or oil. It can also be a commonly used refrigerant such as Freon, ammonia and carbon dioxide.

[0042] Further, since the refrigeration unit 3 is connected with the cold air assembly 2 to form a circulating refrigeration circuit to exchange heat with the introduced air flow, the cooling medium in the pipeline side where the exchange is completed must be at a higher temperature. In order to ensure that the circulating refrigeration circuit can continuously exchange heat with the introduced air flow and cool the air flow entering the air inlet 11 into cold air, a heat dissipation unit 4 is arranged near the pipeline side where the exchange in the circulating refrigeration circuit is completed, so that the temperature of the cooling medium in the circulating refrigeration circuit is always kept below a set temperature to achieve a better cold air blowing effect.

[0043] Further, a temperature detection device can be arranged on the pipeline side where the exchange in the circulating refrigeration circuit is completed to detect the temperature of the cooling medium in the circulating refrigeration circuit to control the heat dissipation unit 4. For example, after the hood is started to work, it is indicated 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 circuit to achieve a better cold air blowing effect. In the case where the working state of the hood is switched from starting work to stopping work, it is indicated that the user has just finished cooking, and the heat dissipation unit 4 can be controlled to continue to work for a period of time until the temperature of the cooling medium is reduced to below the set temperature. After the working state of the hood is stopped, the heat dissipation unit 4 also needs to be controlled intermittently to start working to ensure that the temperature of the cooling medium is always maintained at the set temperature, so that the user can blow cool air when starting to cook, thereby improving the user experience.

[0044] It can be understood that the present application is improved on the basis of the existing range hood to solve the problem of high temperature in the kitchen environment, and then the embodiments of the present application do not limit the type of range hood. Any range hood can be applied to the present application scheme as long as the internal space thereof can be designed to increase the device part provided by the present application for blowing out cold air, so as to blow out cool air to the user.

[0045] It should be noted that, since it does not belong to the content involved in the embodiments of the present application, the other functional modules of the range hood are not described in detail, and can be designed according to the prior art.

[0046] The above-mentioned range hood, the 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, and the refrigeration unit connected with the cold air assembly forms a circulating refrigeration circuit, and the cooling medium flows in the circulating refrigeration circuit, which is used to cool the air flow sent by the air inlet into cold air and blow out from the air outlet; the heat dissipation unit arranged close to the circulating refrigeration circuit is used to make the temperature of the cooling medium in the circulating refrigeration circuit lower than the set temperature. By increasing the device part for blowing out cold air in the internal space of the range hood, the kitchen space is not occupied additionally, the additional value of the existing range hood is increased, cool air is blown out to the user at a suitable height of the range hood, a good cooking experience is provided for the user, and the problem of high temperature in the kitchen in summer is solved.

[0047] In an exemplary embodiment, as shown in Figure 3 The cold air assembly 2 comprises 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, and the sweeping blade 22 is connected with the refrigeration unit 3 to form a circulating refrigeration circuit.

[0048] Specifically, the first fan 21 is arranged close to the air inlet 11, and is used to introduce the hot air of the environment through the air inlet 11 into the cold air cavity 13.

[0049] Exemplarily, the first fan 21 can be realized by a cyclone fan to realize more efficient introduction of hot air of the environment.

[0050] In addition, an oil adsorption device can also be arranged at the air inlet 11 to remove oil fume molecules in the hot air of the kitchen environment introduced by the first fan 21, so as to avoid the phenomenon that the first fan 21 and the surface of the sweeping blade 22 in the cold air cavity 13 are full of oil, avoid the problem that the cold air effect is poor due to corrosion of the device, improve the service life of the element, and reduce the frequency of regular cleaning of the element.

[0051] Further, the sweeping blade 22 is arranged close to the air outlet 12, and the sweeping blade 22 is connected with the refrigeration unit 3 to form a circulating refrigeration circuit, so that the hot air is cooled to cold air in the cold air cavity 13, and then the cold air is sent out to the environment through the air outlet 12, so that the hot air is exchanged to cold air, and the temperature of the environment of the range hood is lowered.

[0052] The sweeping blade 22 and the refrigeration unit 3 are connected to form a circulating refrigeration circuit, which can be that heat exchange fins or heat exchange pipelines are arranged on the sweeping blade 22, or the sweeping blade 22 is arranged to be hollow inside, and heat exchange pipelines are arranged inside, or the hollow sweeping blade 22 is directly used as a heat exchange pipeline, and is connected with the refrigeration unit 3 to form a circulating refrigeration circuit.

[0053] In an exemplary embodiment, as shown in Figure 3 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 communicated with the cooling medium return pipeline 33, the liquid outlet is communicated with the cooling medium output pipeline 32, and the cooling medium output pipeline 32 and the cooling medium return pipeline 33 are further communicated with the sweeping blade 22 to form a circulating refrigeration circuit.

[0054] Specifically, the liquid storage device 31 is used to store cooling medium which is not circulated in the pipeline, and includes a liquid inlet and a liquid outlet. The liquid inlet is used to receive cooling medium which has completed heat exchange, and the liquid outlet is used to output cooling medium which is ready for heat exchange.

[0055] Further, the cooling medium output pipeline 32 is connected with the liquid outlet, and is used to output the cooling medium which is ready for heat exchange in the liquid storage device 31 to the sweeping blade 22 to exchange heat with the hot air in the cold air cavity 13. The cooling medium return pipeline 33 is connected with the liquid inlet, and is used to return the cooling medium which has completed heat exchange to the liquid storage device 31.

[0056] The specific form of the liquid storage device 31 is not limited, which can be a box, a tank or a groove.

[0057] In an exemplary embodiment, as shown in Figure 3 The liquid storage device 31 is a liquid storage tank, and a heat preservation shell is arranged outside the liquid storage tank.

[0058] Specifically, the embodiment adopts the form of liquid storage tank to store the cooling medium which is not circulated in the pipeline. The liquid storage tank can be provided as multiple layers, for example, can include an inner container and an outer protective layer, and the inner container can be made of metal material to facilitate connection with the cooling medium output pipeline 32 and the cooling medium return pipeline 33. For example, the liquid storage tank can adopt an aluminum inner container, because aluminum material has low cost, obvious heat transfer effect, surface oxidation protective film and other characteristics, and meets the design use requirements. At the same time, the liquid storage tank can be externally provided with a heat preservation shell to effectively ensure that the temperature of the cooling medium stored inside is maintained at a set temperature.

[0059] In one exemplary embodiment, as shown in Figure 3 the inside of the air sweeping blade 22 is hollow, one end of which is in communication with the cooling medium output pipeline 32, and the other end is in communication with the cooling medium return pipeline 33.

[0060] Specifically, the inside of the air sweeping blade 22 is hollow, one end of which is in communication with the cooling medium output pipeline 32, and the other end is in communication with the cooling medium return pipeline 33, to form a circulating refrigeration circuit. The present application adopts the air sweeping blade 22 to directly butt joint with the pipelines at both ends to form a circulating refrigeration circuit, which can ensure maximum heat exchange with the hot air introduced into the cold air cavity 13, and improve the efficiency of cooling the kitchen environment.

[0061] Further, the air sweeping blade 22 can 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.

[0062] In one exemplary embodiment, as shown in Figure 3 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.

[0063] The semiconductor refrigeration sheet 41 is composed of N-type semiconductor material and P-type semiconductor material. When the two materials are connected into a galvanic 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, heat is absorbed to form a cold end; and when the current flows from the P-type element to the joint of the N-type element, heat is released to form a hot end. The heat is transferred from the cold end to the hot end, thereby achieving the refrigeration effect. The amount of heat absorption and heat release is determined by the size of the current flowing thereon and the number of element pairs of the semiconductor materials N and P. In addition, the semiconductor refrigeration sheet 41 is internally composed of hundreds of thermoelectric couples to achieve the effect of enhancing refrigeration.

[0064] Specifically, in the heat exchange process of the circulating refrigeration circuit to the introduced air flow, the pipeline side of the completed exchange, that is, the cooling medium in the cooling medium return pipeline 33 is necessarily high in temperature. In order to ensure the sustainability of the circulating refrigeration circuit to the introduced air flow, the air flow sent by the air inlet 11 is cooled into cold air, and a heat dissipation unit 4 needs to be arranged near the cooling medium return pipeline 33 to keep the temperature of the cooling medium in the circulating refrigeration circuit always lower than the set temperature, so as to achieve a better cold air blowing effect.

[0065] Furthermore, the cold end of the semiconductor refrigeration sheet 41 can be arranged close to the cooling medium return pipeline 33 to keep the temperature of the cooling medium in the circulating refrigeration circuit always lower than the set temperature.

[0066] It can be understood that, in order to realize that the cold end of the semiconductor refrigeration sheet 41 is close to the cooling medium return pipeline 33, the flow direction of the current in the semiconductor refrigeration sheet 41 needs to be controlled, that is, the circuit connection relationship needs to be arranged, or the polarity of the direct current flowing thereon needs to be controlled 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.

[0067] In an exemplary embodiment, as shown in Figure 3 The heat dissipation unit 4 further includes a second fan 42 arranged close to the cooling medium return pipeline 33.

[0068] It can be understood that, under the condition that the cold end and the hot end of the semiconductor refrigeration sheet 41 reach a certain temperature difference, when the amount of forward heat transfer and reverse heat transfer is equal, a balance point will be reached, and at this time, the temperature of the cold end and the hot end will not continue to change. In order to achieve a lower temperature, the temperature of the hot end can be lowered by heat dissipation.

[0069] Furthermore, in order to further enhance the heat dissipation effect on the cooling medium return pipeline 33 and ensure that the temperature of the cooling medium in the circulating refrigeration circuit is always lower than the set temperature, a second fan 42 can be added on the basis of the semiconductor refrigeration sheet 41 for heat dissipation.

[0070] The second fan 42 can be realized by using a cross-flow fan or a micro fan.

[0071] In addition, the positional relationship of the semiconductor refrigeration sheet 41 and the second fan 42 relative to the cooling medium return pipeline 33 is not limited, that is, both of them can be arranged on the same side of the cooling medium return pipeline 33 and close to the front and rear pipe sections of the cooling medium return pipeline 33, or they can be arranged on opposite sides of the cooling medium return pipeline 33. In other embodiments, the semiconductor refrigeration sheet 41 can be arranged close to the cooling medium return pipeline 33, and the second fan 42 can be arranged close to the semiconductor refrigeration sheet 41 to further cool the semiconductor refrigeration sheet 41.

[0072] In an exemplary embodiment, as shown in Figure 3 The cooling medium return pipeline 33 includes a first return branch 331 and a second return branch 332, the cold end of the semiconductor refrigeration sheet 41 is arranged close to the first return branch 331, and the second fan 42 is arranged close to the second return branch 332.

[0073] Specifically, the cooling medium return pipeline 33 can be divided into two branches, the first return branch 331 and the second return branch 332, and the semiconductor refrigeration sheet 41 and the second fan 42 are used to dissipate heat and cool the cooling medium in the two branches, respectively.

[0074] It can be understood that the cooling medium return pipeline 33 can be made of metal material with good heat exchange effect to ensure that the returned cooling medium achieves good cooling effect. The liquid storage tank and the cooling medium output pipeline 32 can be made of material with good heat preservation effect, or a heat preservation layer can be added on the outside to reduce heat loss before heat exchange.

[0075] Exemplarily, the range hood can further include a controller. The controller can be connected to the first fan, the semiconductor refrigeration sheet, and the second fan to control the operation of the above-mentioned devices. Of course, the controller can also be connected to other devices in the range hood to control the operation of the devices in the range hood.

[0076] It can be understood that the controller is the control center of the range hood, which can be a control chip or a control circuit board arranged in the main body of the range hood, or an external control system based on wireless communication. The external control system can be realized through a terminal or a server, etc. The terminal can be, but is not limited to, various personal computers, smart phones, tablet computers, Internet of Things devices, and portable wearable devices. The Internet of Things device can be a smart speaker, a smart car device, etc. The portable wearable device can be a smart watch, a smart bracelet, etc. The server can be realized by an independent server or a server cluster composed of multiple servers.

[0077] In combination with the above-mentioned embodiments, in an exemplary embodiment, a range hood control method is provided for controlling the range hood of any of the above-mentioned embodiments, which can be applied to the controller of the range hood. The method includes steps 202 to 204, wherein:

[0078] Step 202, obtaining the working state of the range hood and the temperature of the cooling medium in the circulating refrigeration circuit.

[0079] Specifically, the operating status of a range hood indicates whether it is currently in operation, and can also indirectly indicate whether the user is cooking. The operating status can be determined by whether the range hood's suction fan is working, whether the primary fan is working, or whether the user has issued an operation command.

[0080] Furthermore, the temperature of the cooling medium within the circulating refrigeration loop specifically characterizes the temperature of the cooling medium on the pipe side where heat exchange is completed in the circulating refrigeration loop. This temperature can be obtained by installing a temperature detection device near the pipe side where heat exchange is completed in the circulating refrigeration loop.

[0081] Step 204: If the working state of the smoke machine and the temperature of the cooling medium are determined to meet the start-up heat dissipation conditions, control the heat dissipation state of the heat dissipation unit so as to reduce the temperature of the cooling medium in the circulating refrigeration circuit.

[0082] It is understandable that, since the refrigeration unit and the cold air assembly are connected to form a circulating refrigeration loop to exchange heat with the introduced airflow, the cooling medium in the pipe side after the exchange is completed will inevitably have a higher temperature. In order to ensure that the circulating refrigeration loop can continuously exchange heat with the introduced airflow and cool the airflow delivered by the air inlet into cold air, a heat dissipation unit needs to be installed near the pipe side where the exchange is completed in the circulating refrigeration loop. This will keep the temperature of the cooling medium in the circulating refrigeration loop always below the set temperature, so as to achieve a better cooling effect.

[0083] Specifically, the system can determine whether the heat dissipation conditions have been met based on the range hood's operating status and the temperature of the cooling medium, thereby controlling the heat dissipation status of the heat dissipation unit to lower the temperature of the cooling medium in the circulating cooling circuit. For example, when the range hood is in the operating state (indicating it has started working) and the user is cooking, the heat dissipation unit can be controlled to continue operating to lower the temperature of the cooling medium in the circulating cooling circuit, achieving a better cooling effect. When the range hood switches from operating to stopped (indicating the user has just finished cooking), the heat dissipation unit can be controlled to continue operating for a period of time until the cooling medium temperature drops below the set temperature. Even when the range hood is stopped, the heat dissipation components need to be intermittently activated to ensure the cooling medium temperature is always maintained at the set temperature, ensuring that the user receives cool air as soon as they start cooking, improving the user experience.

[0084] In an exemplary embodiment, step 204 includes steps 302 to 304, wherein:

[0085] Step 302: When the range hood is in the "start" working state, control the heat dissipation state to be in the "start" working state.

[0086] It can be understood that the working state of the range hood is starting work, indicating that the user is continuously cooking, and the range hood is continuously sucking oil fume. At this time, the temperature of the kitchen environment should still be high, and cold air needs to be continuously blown out for cooling.

[0087] Specifically, in the state of continuously blowing out cold air for cooling, in order to ensure that the temperature of the cooling medium in the circulating refrigeration circuit meets the heat exchange requirement, the heat dissipation state of the heat dissipation unit needs to be kept as starting work, the cooling medium in the cooling medium return pipeline is cooled, and the temperature of the cooling medium in the circulating refrigeration circuit is kept below the set temperature, so as to achieve a better cold air blowing effect.

[0088] Step 304, in the case that the working state of the range hood is switched from starting work to stopping work, the heat dissipation unit is controlled to keep starting work until the cooling medium temperature is reduced to below the set temperature, and the heat dissipation state is controlled to switch to stopping work.

[0089] It can be understood that the working state of the range hood is switched from starting work to stopping work, indicating that the user has just finished cooking. At this time, the blowing of cold air may also have just ended.

[0090] Specifically, in the state of just ending the blowing of cold air, the temperature of the cooling medium in the cooling medium return pipeline may still be high, which does not meet the preset temperature. Thus, after returning to the liquid storage tank, the temperature of the cooling medium in the liquid storage tank may be raised. Therefore, in this state, the heat dissipation unit needs to be controlled to keep starting work until the cooling medium temperature is reduced to below the set temperature, and then the heat dissipation state is controlled to switch to stopping work. In this way, the temperature of the cooling medium in the circulating refrigeration circuit can be kept below the set temperature, and the next time the first fan is turned on by the user, cool cold air can be blown out, and the user experience can be improved.

[0091] In an exemplary embodiment, step 204 further comprises step 306, wherein:

[0092] Step 306, in the case that the working state of the range hood is stopping work but the cooling medium temperature is higher than the set temperature, the heat dissipation state is controlled to starting work until the cooling medium temperature is reduced to below the set temperature, and then the heat dissipation state is controlled to switch to stopping work.

[0093] Specifically, the working state of the range hood is stopping work, i.e., the user is not cooking. In this state, the temperature of the cooling medium in the circulating refrigeration circuit can be continuously monitored. When the temperature is higher than the set temperature, the heat dissipation unit is controlled to start work until the cooling medium temperature is reduced to below the set temperature, and then the heat dissipation state is controlled to switch to stopping work.

[0094] In the embodiment, the temperature of the cooling medium in the circulating refrigeration circuit is monitored in real time to ensure that the temperature is always lower than the set temperature when the range hood is not working, so that the user can open the range hood to blow cool air, thereby improving the user experience.

[0095] In other embodiments, in order to reduce energy consumption, the temperature of the cooling medium in the circulating refrigeration circuit can be monitored intermittently when the range hood is in a stopped working state. For example, the temperature of the cooling medium in the circulating refrigeration circuit can be monitored at intervals of a preset time period after the range hood is in the stopped working state, and then the cooling state is controlled to be in a started working state when the temperature of the cooling medium is higher than the set temperature, until the temperature of the cooling medium is reduced to below the set temperature, and the cooling state is switched to the stopped working state. The preset time period can be freely set according to user needs.

[0096] In addition, the habits of the user using the range hood can be analyzed, or the common time period of the user using the range hood can be obtained according to the user's self-setting, such as the regular cooking time period in the morning, noon and evening, and the temperature of the cooling medium in the circulating refrigeration circuit is monitored and cooled. For example, the temperature of the cooling medium in the circulating refrigeration circuit can be monitored at a preset time point after the range hood is in the stopped working state, and then the cooling state is controlled to be in a started working state when the temperature of the cooling medium is higher than the set temperature, until the temperature of the cooling medium is reduced to below the set temperature, and the cooling state is switched to the stopped working state. The preset time point can be a time point that is earlier than the regular cooking time period by a preset time period, and the preset time period is set to ensure that the temperature of the cooling medium is reduced to below the set temperature. For example, if the common time period of the user is from 8:00 to 9:00 in the morning, and the device needs about half an hour to cool down, the preset time point can be set to 7:30.

[0097] In one exemplary embodiment, the cooling state is controlled to be in a started working state, including: starting the semiconductor refrigeration piece and the second fan to work together. Specifically, in the case where the range hood includes two cooling devices, i.e., the semiconductor refrigeration piece and the second fan, both of them need to be controlled to work at the same time to ensure the best cooling effect.

[0098] In one of the embodiments, the method further includes: starting the first fan to work when the range hood is in a started working state and the indoor environment temperature exceeds a preset temperature threshold.

[0099] It can be understood that whether the first fan is started to work, i.e., whether to blow cold air to the user, can be controlled, and specifically, the first fan can be started to work to blow cold air to the user when the range hood is in a started working state and the indoor environment temperature exceeds a preset temperature threshold.

[0100] In one specific embodiment, an extractor hood is provided, which mainly consists 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, the cooling medium is cooled by the second fan and the semiconductor refrigeration sheet together, and the liquid storage tank has a heat preservation effect. In the extractor hood, a circulating refrigeration circuit is arranged between the liquid storage tank and the sweeping blade, so that the cooling medium in the liquid storage tank can be circulated into the sweeping blade. The wind blown by the fan in the first fan flows through the sweeping blade (at this time the sweeping blade is low temperature) to cool the air and blow to the user, so as to achieve the cooling effect. The second fan and the semiconductor refrigeration sheet work together to cool the cooling medium, and the semiconductor refrigeration sheet has better cooling effect, and the purpose is to reduce to a lower temperature. When the two work together, the cooling is faster.

[0101] As Figure 4 With Figure 5 As shown in the working principle flow chart of the above-mentioned extractor hood, specifically, when the user does not cook (does not operate the hood), the second fan and the semiconductor refrigeration sheet work together to cool the cooling medium, and when the user sets the 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 is circulated to the sweeping blade through the circulating refrigeration circuit, and 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 is ended.

[0102] In this embodiment, the semiconductor refrigeration and the fan are used to cool the cooling medium in advance, and when the user cooks and turns on the first fan to cool, the cooling medium circulates in the circulating refrigeration circuit, and the sweeping blade blows the cold air in the cooling medium to the user, so as to achieve the cooling effect.

[0103] The technical features of the above-mentioned embodiments can be combined arbitrarily, in order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combination of these technical features does not exist contradictory, it should be considered as the scope of the description.

[0104] The above-mentioned embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of variations and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A range hood, characterized in that, The range hood includes: The main body includes an air inlet and an air outlet, and a cold air chamber is connected between the air inlet and the air outlet; A cold air assembly is disposed in the cold air cavity, and a refrigeration unit is connected to the cold air assembly to form a circulating refrigeration circuit. A cooling medium flows in the circulating refrigeration circuit to cool the airflow sent in by the air inlet into cold air and blow it out from the air outlet. A heat dissipation unit located near the circulating refrigeration circuit is used to keep the temperature of the cooling medium in the circulating refrigeration circuit below a set temperature.

2. The range hood according to claim 1, characterized in that, The cooling air assembly includes a first fan and a sweeping blade. The first fan is positioned near the air inlet, and the sweeping blade is positioned near the air outlet. The sweeping blade is connected to the refrigeration unit to form a circulating refrigeration circuit.

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 an inlet and an outlet. The inlet is connected to the cooling medium return pipeline, and the 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 air sweeping blades to form the circulating refrigeration circuit.

4. The range hood according to claim 3, characterized in that, The air-sweeping blade is hollow inside, with one end connected to the cooling medium output pipe and the other end connected to the cooling medium return pipe.

5. The range hood according to claim 3, characterized in that, The heat dissipation unit includes a semiconductor refrigeration chip, with the cold end of the semiconductor refrigeration chip positioned close to the cooling medium return pipe.

6. The range hood according to claim 5, characterized in that, The heat dissipation unit also includes a second fan, which is located near the cooling medium return pipe.

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 chip is located near the first return branch, and the second fan is located near 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 the liquid storage tank is provided with an insulated shell.

9. The range hood according to any one of claims 1 to 8, characterized in that, The air inlet is located at the top or bottom of the range hood, and the air outlet is located at the control panel of the range hood.

10. The range hood according to claim 9, characterized in that, An oil stain adsorption device is installed on the inner side of the air inlet.

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