Kitchen ventilation device and kitchen integrated equipment
By designing a multi-directional air curtain and heat exchange system in the kitchen ventilation system, the problem of oil fume escape is solved, achieving efficient absorption of oil fumes and improvement of air quality, thereby enhancing user comfort and saving energy.
Patent Information
- Application Number
- CN202520987695.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-15
- Estimated Expiration
- 2035-05-20
AI Technical Summary
Existing kitchen air curtain technology cannot effectively prevent the escape of cooking fumes, resulting in oil fume pollution of the kitchen environment and a high risk of users inhaling the fumes.
Design a kitchen ventilation device, including a housing, a first fan, an air curtain duct assembly, and a heat exchange system, to form a multi-directional air curtain to surround the range hood, utilize the heat exchange system to regulate the air curtain temperature, and combine the structural optimization of the air curtain duct assembly to ensure the strength and comfort of the air curtain.
It effectively prevents cooking fumes from escaping, improves the absorption efficiency of the range hood, improves kitchen air quality, enhances user cooking comfort, and saves energy.
Smart Images
Figure CN224246267U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a kitchen ventilation device and an integrated kitchen equipment, belonging to the technical field of kitchen appliances. Background Technology
[0002] In a kitchen environment, range hoods absorb cooking fumes, but during this process, some fumes escape into the kitchen environment. This is where air curtain technology comes in. Its principle is to blow air at extremely high speeds, creating a strong and stable airflow to block the fumes. However, current air curtain technology has some shortcomings: some air curtains fail to effectively block the fumes from the user, causing the user to inhale the fumes; others are ineffective at blocking fumes from the sides, allowing them to easily escape from the sides of the range hood into the kitchen. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a kitchen ventilation device and integrated kitchen equipment that can surround oil fumes, improve the efficiency of oil fumes absorption by the oil press device, and prevent oil fumes from escaping and polluting the air quality of the kitchen environment.
[0004] This utility model is achieved through the following technical solution.
[0005] A kitchen ventilation device, installed above a range hood, includes:
[0006] The casing and the first fan and air curtain duct assembly installed inside the casing;
[0007] The first fan is used to draw in outside air from the kitchen and output it through the air curtain duct assembly;
[0008] The casing is provided with at least one front air curtain opening on the front side of the range hood device, and at least one side air curtain opening on each side of the range hood device. The air curtain pipe assembly connects the first fan to the front air curtain opening and the side air curtain opening. The front air curtain opening and the side air curtain opening are used to form air curtains on the front and sides of the range hood device.
[0009] As a further improvement of this utility model, the position of the front air curtain opening corresponding to the air curtain tube group is located upstream of the side air curtain opening corresponding to the air curtain tube group.
[0010] As a further improvement of this utility model, the air curtain tube assembly includes:
[0011] The main air curtain duct connects to the first fan;
[0012] The air curtain diversion pipe is connected to the main air curtain pipe in the middle and closed at both ends. The air curtain diversion pipe has a front air hole that connects to the front air curtain opening and a side air hole that connects to the side air curtain opening.
[0013] As a further improvement of this utility model, the air curtain diversion pipe has a front pipe extending in the left-right direction and two side pipes connecting the left and right ends of the front pipe and extending in the front-back direction.
[0014] The front tube is connected to the air curtain main tube in the middle, and the rear ends of the two side tubes are closed. The front tube is positioned inside the housing corresponding to the front panel of the housing, and the two side tubes are positioned inside the housing corresponding to the two side panels of the housing, respectively.
[0015] As a further improvement of this utility model, at least one burner head is provided below the range hood device;
[0016] The casing has a front air curtain vent at least above the corresponding burner head.
[0017] As a further improvement of this utility model, the front air curtain is located at the front of the bottom plate of the housing, and the side air curtain is located at the bottom of the side plate of the housing.
[0018] As a further improvement to this utility model, it also includes:
[0019] The filter structure is used to filter the outside air introduced into the kitchen by the first fan.
[0020] As a further improvement to this utility model, it also includes:
[0021] The second fan is used to introduce air into the kitchen;
[0022] The heat exchange system includes a first heat exchange unit and a second heat exchange unit that form a reversible refrigerant circulation loop. The first heat exchange unit is used to exchange heat with the outdoor air introduced into the kitchen by the first fan, and the second heat exchange unit is used to exchange heat with the indoor air introduced into the kitchen by the second fan.
[0023] As a further improvement to this utility model, it also includes:
[0024] The third heat exchange unit is used for heat exchange of kitchen air that has undergone heat exchange in the second heat exchange unit, and the heat transfer direction of the third heat exchange unit is opposite to that of the second heat exchange unit.
[0025] The casing is equipped with at least one air outlet for discharging kitchen air that has undergone heat exchange in the third heat exchange unit.
[0026] An integrated kitchen appliance, comprising:
[0027] Kitchen ventilation system;
[0028] The range hood unit is installed at the bottom of the kitchen ventilation system.
[0029] The beneficial effects of this utility model are:
[0030] 1. The air curtain at the front of the range hood prevents cooking fumes from escaping towards the user, effectively preventing the user from inhaling the fumes. The air curtains on both sides of the range hood prevent cooking fumes from escaping to the sides. The air curtains formed at these three different locations can effectively surround the cooking fumes, improving the efficiency of the oil press in absorbing cooking fumes and preventing the fumes from escaping and polluting the air quality in the kitchen. In addition, since the air curtains are formed by outside air at a suitable temperature, they can further improve the air quality in the kitchen environment, enhancing the user's comfort and experience while cooking.
[0031] 2. The front air curtain vent is located upstream of the side air curtain vent, which theoretically makes the airflow of the air curtain at the front of the range hood the strongest, thus effectively isolating the fumes from the user and preventing the user from inhaling the fumes while cooking. Attached Figure Description
[0032] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of this utility model, wherein:
[0033] Figure 1 This is a schematic diagram of a heat exchange system;
[0034] Figure 2 This is a connection diagram of a heat exchange system;
[0035] Figure 3 This is a schematic diagram of a heat exchange system operating in a winter scenario.
[0036] Figure 4 This is a schematic diagram of a heat exchange system operating in a summer scenario.
[0037] Figure 5 A schematic diagram of the internal structure of a kitchen ventilation system from one perspective;
[0038] Figure 6 A schematic diagram of the internal structure of a kitchen ventilation system from another perspective;
[0039] Figure 7 This is a schematic diagram showing the arrangement of air curtain openings and air outlets on a kitchen ventilation system.
[0040] Figure 8 This is a schematic diagram of an air curtain duct assembly from one perspective.
[0041] Figure 9 This is a schematic diagram of the air curtain duct assembly from another perspective.
[0042] Figure 10 This is a schematic diagram illustrating the steps of a control method based on a kitchen ventilation device.
[0043] Figure 11 This is a schematic diagram of an integrated kitchen appliance. Detailed Implementation
[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0045] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.
[0046] Implementation Case 1:
[0047] Reference Figures 1-9 A kitchen ventilation device, specifically referring to... Figure 5 and Figure 6 It includes a housing 11, a first fan 121, a second fan 122, and a heat exchange system, all of which are located inside the housing 11.
[0048] In this embodiment, the first fan 121 is used to introduce outside air into the casing 11 and eventually discharge outside air into the kitchen environment. The outside air is usually outdoor air, which is fresher than the air inside the kitchen. The second fan 122 is used to introduce inside air into the casing 11.
[0049] In this implementation case, refer to Figure 1 and Figure 2 The heat exchange system includes a first heat exchange unit 131 and a second heat exchange unit 132, which form a reversible refrigerant circulation loop. The first heat exchange unit 131 exchanges heat with outside air introduced by the first fan 121, and the second heat exchange unit 132 exchanges heat with inside air introduced by the second fan 122. (Refer to...) Figure 7 In this embodiment, the kitchen ventilation device works in conjunction with the range hood device 2. The kitchen ventilation device is located above the range hood device 2. The casing 11 is provided with at least one air curtain opening a. The air curtain opening a is used to discharge the kitchen outside air that has undergone heat exchange in the first heat exchange unit 131 and forms an air curtain. The air curtain can effectively prevent the cooking fumes from escaping during the process of being sucked in by the range hood device 2, thereby improving the fume extraction effect.
[0050] By introducing outside air into the kitchen, an air curtain can be created to prevent cooking fumes from escaping, effectively improving kitchen air quality. However, in summer, the outside air temperature is high, resulting in a high-temperature air curtain in the kitchen environment. In winter, the outside air temperature is low, resulting in a low-temperature air curtain in the kitchen environment. Both of these factors lead to a relatively poor user experience.
[0051] In this implementation case, the heat exchange system exchanges heat with the air outside the kitchen and the air inside the kitchen through the first heat exchange unit 131 and the second heat exchange unit 132, which form a reversible refrigerant circulation loop. This effectively achieves heat exchange between the air outside the kitchen and the air inside the kitchen, making the air curtain temperature discharged into the kitchen environment more suitable and improving the user's comfort.
[0052] In addition, by exchanging heat between the air outside and inside the kitchen through a heat exchange system, the temperature of the air curtain can be improved, which can effectively reduce the energy consumption of the kitchen ventilation device in this embodiment and achieve the effect of saving energy.
[0053] It should be noted that the kitchen ventilation device in this embodiment is used in extreme climates. The heat exchange system alone is used to exchange heat between the air outside the kitchen and the air inside the kitchen. The temperature of the air curtain cannot reach the range of comfort for users. Therefore, the kitchen ventilation device in this embodiment is also equipped with a preheating device and a cooling device (not shown in the figure). In extreme climates, the air outside the kitchen introduced by the first fan 121 can be preheated or cooled before the air outside the kitchen and the air inside the kitchen can be exchanged through the heat exchange system.
[0054] Specifically, in winter, the temperature of the air outside the kitchen is low, while the temperature of the air inside the kitchen is higher. The second heat exchange unit 132 absorbs heat from the air inside the kitchen, and through refrigerant circulation, the first heat exchange unit 131 transfers the heat to the air outside the kitchen, thus heating the air outside the kitchen and increasing the temperature of the air curtain discharged into the kitchen environment. In summer, the temperature of the air outside the kitchen is high, while the temperature of the air inside the kitchen is lower. The first heat exchange unit 131 absorbs heat from the air outside the kitchen, and through refrigerant circulation, the second heat exchange unit 132 transfers the heat to the air inside the kitchen, thus cooling the air outside the kitchen and reducing the temperature of the air discharged into the kitchen environment.
[0055] In winter, the first heat exchange unit 131 functions as a condenser and the second heat exchange unit 132 functions as an evaporator; in summer, the first heat exchange unit 131 functions as an evaporator and the second heat exchange unit 132 functions as a condenser.
[0056] In this implementation case, refer to Figure 1 and Figure 2 The heat exchange system also includes a refrigerant pipe 133 and a power pump 134. The refrigerant pipe 133 connects the first heat exchange unit 131 and the second heat exchange unit 132 and forms a reversible refrigerant circulation loop. The refrigerant flows in the first heat exchange unit 131, the second heat exchange unit 132 and the refrigerant pipe 133. The refrigerant is the refrigerant, usually Freon. The power pump 134 is used to provide the power for the flow of the refrigerant.
[0057] In this embodiment, the first heat exchange unit 131 and the second heat exchange unit 132 have a height difference, which is integral to the whole. The refrigerant, in a liquid state, flows from the higher position to the lower position under the influence of gravity, thus enabling refrigerant circulation in one direction of the heat exchange system through gravity. The refrigerant circulation in the other direction of the heat exchange system is powered by the power pump 134. By setting the first heat exchange unit 131 and the second heat exchange unit 132 at different horizontal heights, gravity can be used to achieve refrigerant circulation in one direction, eliminating the need for additional power and thus saving energy.
[0058] It should be noted that in some implementation cases, the heat exchange system of this implementation case is applied in the kitchen ventilation device. The first heat exchange unit 131 and the second heat exchange unit 132 exchange heat between the air inside the kitchen and the air outside the kitchen. The heat exchanged air outside the kitchen is discharged into the kitchen environment. This is not limited to forming an air curtain through the air curtain outlet a to block the escape of oil fumes, but also includes using the air outside the kitchen as fresher and higher quality fresh air at a suitable temperature to improve the air quality inside the kitchen.
[0059] In this embodiment, the first heat exchange unit 131 is positioned higher than the second heat exchange unit 132 within the casing 11. When the temperature of the air outside the kitchen is lower than the temperature of the air inside the kitchen, the refrigerant in the first heat exchange unit 131 changes from a gaseous state to a liquid state, and the refrigerant in the second heat exchange unit 132 changes from a liquid state to a gaseous state, with the refrigerant circulating due to gravity. When the temperature of the air outside the kitchen is higher than the temperature of the air inside the kitchen, the refrigerant in the first heat exchange unit 131 changes from a liquid state to a gaseous state, and the refrigerant in the second heat exchange unit 132 changes from a gaseous state to a liquid state, with the refrigerant circulating through the power pump 134. (Refer to...) Figure 3 In winter applications, the heat exchange system can exchange heat between the air outside and inside the kitchen without requiring power, thus heating the air outside the kitchen; (Refer to...) Figure 4In summer applications, the heat exchange system needs to start the power pump 134 to exchange heat between the air outside the kitchen and the air inside the kitchen, thereby completing the cooling effect on the air outside the kitchen.
[0060] In this embodiment, the heat exchange system also includes a control valve 135, which is connected in parallel with the power pump 134 on the refrigerant pipeline 133, i.e., the control valve 135 serves as a bypass route. In applications requiring a higher air curtain temperature, such as in winter, the control valve 135 is opened and the power pump 134 is turned off. The refrigerant in the first heat exchange unit 131 changes from a gaseous state to a liquid state and flows through the control valve 135 into the second heat exchange unit 132 for vaporization and circulation. In applications requiring a lower air curtain temperature, such as in summer, the control valve 135 is closed and the power pump 134 is started. The refrigerant in the second heat exchange unit 132 changes from a gaseous state to a liquid state and flows through the power pump 134 into the first heat exchange unit 131 for liquefaction and circulation. In applications where the air curtain temperature does not need to be changed, such as in spring and autumn, both the control valve 135 and the power pump 134 are closed. The control valve 135 can be configured as a solenoid valve, which offers advantages such as fast response, high control accuracy, and high reliability.
[0061] In this embodiment, the heat exchange system also includes a controller (not shown in the figure), which controls the starting and stopping of the power pump 134 and the control valve 135. In applications requiring increased air curtain temperature, the controller opens the control valve 135 and shuts down the power pump 134; in applications requiring decreased air curtain temperature, the controller closes the control valve 135 and starts the power pump 134; in applications where no change in air curtain temperature is required, the controller shuts down both the control valve 135 and the power pump 134.
[0062] In this embodiment, the heat exchange system also includes a temperature sensor (not shown in the figure) for detecting the temperature of the air outside the kitchen. Based on the detection result, it is determined whether the heat exchange system needs to intervene to increase or decrease the temperature of the air curtain. That is, the temperature sensor provides the controller with the judgment conditions for controlling the power pump 134 and the control valve 135.
[0063] In addition, the heat exchange system also includes two other temperature sensors (not shown in the figure). One is used to detect the temperature of the air inside the kitchen, and the other is used to detect the temperature of the air outside the kitchen that is discharged after exchanging heat through the first heat exchange unit 131, which is the temperature of the air curtain. By comparing these two results, the power or speed of the first fan 121 is adjusted to regulate the intensity of the air curtain, or / and the comparison of these two results is used to determine whether the air outside the kitchen needs to be preheated or cooled, so that the intensity and temperature of the air curtain can provide better comfort for the user.
[0064] The kitchen ventilation system in this implementation case refers to... Figure 8 and Figure 9 and combined Figure 5 and Figure 6 It also includes an air curtain duct assembly 14, which connects the first fan 121 and multiple air curtain outlets a. The air outside the kitchen introduced by the first fan 121 flows along the air curtain duct assembly 14 and is finally output from the air curtain outlets a to form a stable air curtain.
[0065] In this implementation case, combined with Figure 7 The air curtain opening a includes a front air curtain opening a1 and a side air curtain opening a2. The housing 11 is provided with at least one front air curtain opening a1 on the front side of the range hood device 2, and at least one side air curtain opening a2 is provided on each side of the range hood device 2. The air curtain pipe assembly 14 connects the first fan 121 and the front air curtain opening a1 and the side air curtain opening a2, so that the front air curtain opening a1 forms an air curtain on the front side of the range hood device 2, and the side air curtain opening a2 forms air curtain openings a on both sides of the range hood device 2. The air curtain at the front of the range hood unit 2 prevents cooking fumes from escaping towards the user, effectively preventing the user from inhaling the fumes. The air curtains on both sides of the range hood unit 2 prevent cooking fumes from escaping to the sides. The air curtains formed at these three different locations can surround the cooking fumes, improving the efficiency of the oil press unit in absorbing cooking fumes and preventing the fumes from escaping and polluting the air quality in the kitchen environment. In addition, since the air curtains are formed by outside air at a suitable temperature, they can further improve the air quality in the kitchen environment, enhancing the user's comfort and experience while cooking.
[0066] In addition, the front air curtain opening a1 and the side air curtain opening a2 are designed to be horizontally narrow and long. On the one hand, this can increase the width of the air curtain to increase the blocking range of oil fumes, and on the other hand, it can increase the wind force, making the blocking effect of the air curtain stronger.
[0067] In this implementation case, the position of the front air curtain opening a1 corresponding to the air curtain pipe group 14 is located upstream of the side air curtain opening a2 corresponding to the air curtain pipe group 14. Therefore, the air force of the air curtain located in front of the range hood device 2 is theoretically the strongest, which can effectively isolate the oil fumes from the user and prevent the user from inhaling oil fumes while cooking.
[0068] In this implementation case, refer to Figure 8 and Figure 9The air curtain pipe assembly 14 includes an air curtain main pipe 141 and an air curtain branch pipe 142. The air curtain main pipe 141 is connected to the first fan 121. The middle part of the air curtain branch pipe 142 is connected to the air curtain main pipe 141, and both ends of the air curtain branch pipe 142 are closed ends. The air curtain branch pipe 142 has a front air hole 14a that connects to the front air curtain opening a1 and a side air hole 14b that connects to the side air curtain opening a2. The outdoor air introduced by the first fan 121 flows along the main air curtain duct 141. When it reaches the middle of the air curtain branch duct 142, it splits into two streams, which flow to opposite ends of the branch duct 142. The outdoor air first flows through the front air vent 14a and is discharged from the front air curtain outlet a1, forming an air curtain located in front of the range hood 2. Then it flows through the side air vent 14b and is discharged from the side air curtain outlet a2, forming an air curtain located on the side of the range hood 2. By configuring the air curtain duct assembly 14 as a combination of the main air curtain duct 141 and the air curtain branch duct 142, the structure of the air curtain duct assembly 14 can be simplified, and the exhaust efficiency of the outdoor air can be improved.
[0069] In this embodiment, the air curtain diversion pipe 142 has a front pipe 1421 extending in the left-right direction and two side pipes 1422 connecting the left and right ends of the front pipe 1421 and extending in the front-back direction. The middle of the front pipe 1421 connects to the main air curtain pipe 141, and the rear ends of the two side pipes 1422 are closed. The front pipe 1421 is positioned within the housing 11 corresponding to the front panel of the housing 11, and the two side pipes 1422 are positioned within the housing 11 corresponding to the two side panels of the housing 11. The front pipe portion of the air curtain diversion pipe 142 corresponds to the front panel of the housing 11, and the side pipe portions correspond to the side panels of the housing 11. This arrangement prevents the air curtain diversion pipe 142 from encroaching on the space within the housing 11, which is beneficial for the layout of other functional components within the housing 11.
[0070] In this embodiment, at least one burner (not shown in the figure) is located below the range hood device 2. The casing 11 has a front air curtain opening a1 at least above the corresponding burner, so that the air curtain formed by the front air curtain opening a1 is located directly in front of the fumes generated by the burner, making the air curtain more effective at blocking the fumes. Typically, household kitchens have two burners, and correspondingly, the casing 11 has a front air curtain opening a1 above each of the two burners.
[0071] The kitchen ventilation device in this embodiment has a width in the left-right direction that is roughly the same as that of the range hood device 2, and a thickness in the front-back direction that is greater than that of the range hood device 2. Therefore, the front air curtain opening a1 is located at the front of the bottom plate of the housing 11, and the side air curtain opening a2 is located at the bottom of the side plate of the housing 11, so that the distance between the air curtain and the fumes at the three positions is kept within an effective and reliable blocking range.
[0072] The kitchen ventilation device in this embodiment also includes a filter structure for filtering the outside air introduced by the first fan 121 to prevent dust and other contaminants from being brought into the kitchen environment. More specifically, the filter structure can be a filter screen, which can be installed on the first fan 121, on the air curtain duct assembly 14, or simultaneously on both the first fan 121 and the air curtain duct assembly 14.
[0073] The kitchen ventilation system in this implementation case refers to... Figure 1 It also includes a third heat exchange unit 151, where the kitchen air that has undergone superheat exchange with the second heat exchange unit 132 exchanges heat again with the third heat exchange unit 151. The heat transfer directions of the third heat exchange unit 151 and the second heat exchange unit 132 are opposite, thereby ensuring that the temperature of the kitchen air introduced by the second fan 122 reaches a suitable level. (Refer to...) Figure 7 The housing 11 is provided with at least one air outlet b for discharging kitchen air that has undergone heat exchange with the third heat exchange unit 151, thereby maintaining a suitable temperature in the kitchen environment. In addition, the air outlet b is located on the front panel of the housing 11 and extends laterally.
[0074] By incorporating a third heat exchange unit 151 and an air outlet b, the kitchen ventilation system in this embodiment can be adapted to various application scenarios. For example, when cooking in an environment that generates fumes, an air curtain can be provided by air curtain outlet a. In summer or winter application scenarios, a temperature-appropriate air curtain can be provided through the heat exchange system. In this application scenario, temperature-appropriate air can also be output through air outlet b. When cooking without generating fumes, and in summer or winter application scenarios, temperature-appropriate air can be output through air outlet b to improve the temperature of the kitchen environment.
[0075] Reference Figure 5 and Figure 6 The casing 11 also contains an exhaust fan 152, a compressor 153, a condenser 154, a connecting pipe 155, etc. The above components and the third heat exchange unit 151 constitute the air conditioning module "indoor unit" and "outdoor unit" integrated in the casing 11. Its working principle is existing technology and will not be described again.
[0076] In this implementation case, refer to Figure 1 The second heat exchange unit 132 and the third heat exchange unit 151 are integrated into a heat exchange assembly 16, which can improve the integration of internal components of the housing 11, reduce costs, and compress the space of the internal layout.
[0077] Implementation Case 2:
[0078] A control method, referring to Figure 10 and combined Figures 1-7Based on the kitchen ventilation device 1 in Implementation Case 1.
[0079] The steps include:
[0080] Step S1: Start the first fan 121 to introduce outside air into the kitchen, and output air from the air curtain outlet a to form an air curtain;
[0081] Step S2: Determine the temperature of the air outside the kitchen, and determine whether the heat exchange system should be put into operation based on the temperature of the air outside the kitchen.
[0082] Step S2 involves determining the temperature of the air outside the kitchen and then determining whether the heat exchange system is operational based on that temperature. This includes the following three scenarios:
[0083] Scenario a: When the temperature of the air outside the kitchen is between the low temperature threshold and the high temperature threshold, the heat exchange system does not enter the working state.
[0084] In scenario a, the temperature of the air outside the kitchen is detected by a temperature sensor. The temperature of the air outside the kitchen is in a suitable state, that is, there is no need to heat or cool the air outside the kitchen through a heat exchange system. In this implementation case, the low temperature threshold is set to 16℃ and the high temperature threshold is set to 30℃.
[0085] Scenario b: When the temperature of the air outside the kitchen is lower than the low temperature threshold, the second fan 122 is activated to introduce air into the kitchen, the heat exchange system enters the working state, and the first heat exchange unit 131 transfers heat to the air outside the kitchen, while the air inside the kitchen transfers heat to the second heat exchange unit 132.
[0086] In scenario b, the temperature sensor detects the air temperature outside the kitchen, which is found to be low, below 16°C.
[0087] Scenario c: When the temperature of the air outside the kitchen is higher than the high temperature threshold, the fan is activated to introduce air into the kitchen, the heat exchange system enters the working state, and the air outside the kitchen transfers heat to the first heat exchange unit 131, and the second heat exchange unit 132 transfers heat to the air inside the kitchen.
[0088] In scenario c, the temperature sensor detects the air temperature outside the kitchen, which is found to be high, i.e., above 30°C.
[0089] The control method in this implementation case, in the case of scenario b or scenario c, also includes the following steps:
[0090] Step S3: In the scenario where the heat exchange system is in operation, determine the temperature difference between the air curtain and the air in the kitchen, and determine the air outlet intensity of the air curtain a based on the temperature difference, and the temperature difference and the air outlet intensity are inversely proportional.
[0091] In step S3, the temperature Tn of the air in the kitchen and the temperature Ts of the air curtain are detected by a temperature sensor to determine the temperature difference ΔT between the air temperature Tn and the air curtain temperature Ts. Then, the power of the first fan 121 is adjusted according to the temperature difference ΔT, thereby adjusting the airflow intensity of the air curtain. The larger the temperature difference ΔT, the worse the comfort level of the air curtain temperature Ts, so the airflow intensity of the air curtain needs to be reduced. Conversely, the smaller the temperature difference ΔT, the better the comfort level of the air curtain temperature Ts, so the airflow intensity of the air curtain needs to be increased.
[0092] In some implementations, the temperature difference ΔT is set with two thresholds, namely 2℃ and 4℃. The power of the first fan 121 is set with two levels: high and low. When the temperature difference ΔT is less than 2℃, the first fan 121 operates at the high level, and when the temperature difference ΔT is less than 4℃, the first fan 121 operates at the low level.
[0093] Of course, the number of speeds of the first fan 121 is not limited to two, and the threshold for the temperature difference ΔT is not limited to two, nor is the threshold limited to 2℃ and 4℃.
[0094] The control method in this implementation case, in the case of scenario b or scenario c, also includes the following steps:
[0095] Step S4: When the heat exchange system is in operation, determine the temperature difference between the air curtain and the air in the kitchen. When the temperature difference is greater than the maximum temperature difference threshold, preheat or precool the air outside the kitchen introduced by the first fan 121.
[0096] In step S4, when the temperature difference ΔT is greater than the maximum temperature difference threshold, it means that the temperature Ts of the air curtain is in a poor state for the user's comfort. Therefore, it is necessary to preheat or cool the air curtain through the preheating device or cooling device installed in the kitchen ventilation device 1 so that the temperature Ts of the air curtain can reach the range of user comfort experience.
[0097] In some implementations, the maximum temperature difference threshold is set to 4°C, but the maximum temperature difference threshold can also be set according to the user's actual application needs.
[0098] Implementation Case 3:
[0099] An integrated kitchen appliance, as described above Figure 11 It includes a kitchen ventilation device 1 and a range hood device 2, wherein the kitchen ventilation device 1 is as shown in Embodiment 1, and the range hood device 2 is installed at the bottom of the kitchen ventilation device 1.
[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A kitchen ventilation device, characterized in that, Located above the range hood unit (2), it includes: The housing (11) and the first fan (121) and the air curtain duct assembly (14) disposed within the housing (11); The first fan (121) is used to draw in outside air from the kitchen and output it through the air curtain duct assembly (14); The housing (11) is provided with at least one front air curtain opening (a1) at the front of the range hood device (2) and at least one side air curtain opening (a2) at each of the two sides of the range hood device (2). The air curtain pipe assembly (14) connects the first fan (121) and the front air curtain opening (a1) and the side air curtain opening (a2). The front air curtain opening (a1) and the side air curtain opening (a2) are used to form air curtains on the front and both sides of the range hood device (2).
2. The kitchen ventilation device according to claim 1, characterized in that, The position of the front air curtain opening (a1) corresponding to the air curtain tube group (14) is located upstream of the position of the side air curtain opening (a2) corresponding to the air curtain tube group (14).
3. The kitchen ventilation device according to claim 2, characterized in that, The air curtain tube assembly (14) includes: The main air curtain duct (141) is connected to the first fan (121); The air curtain diversion pipe (142) is connected to the air curtain main pipe (141) in the middle and closed at both ends. The air curtain diversion pipe (142) has a front air hole (14a) that connects to the front air curtain opening (a1) and a side air hole (14b) that connects to the side air curtain opening (a2).
4. The kitchen ventilation device according to claim 3, characterized in that, The air curtain diversion pipe (142) has a front pipe (1421) extending in the left-right direction and two side pipes (1422) connecting the left and right ends of the front pipe (1421) and extending in the front-back direction. The front tube (1421) is connected to the air curtain main tube (141) in the middle. The rear ends of the two side tubes (1422) are closed. The front tube (1421) is positioned in the housing (11) corresponding to the front plate of the housing (11). The two side tubes (1422) are positioned in the housing (11) corresponding to the two side plates of the housing (11).
5. The kitchen ventilation device according to claim 1, characterized in that, At least one burner head is provided below the range hood device (2); The housing (11) is provided with the front air curtain (a1) at least above the corresponding burner head.
6. The kitchen ventilation device according to claim 1, characterized in that, The front air curtain (a1) is located at the front of the bottom plate of the housing (11), and the side air curtain (a2) is located at the bottom of the side plate of the housing (11).
7. The kitchen ventilation device according to any one of claims 1-6, characterized in that, Also includes: A filter structure is used to filter the kitchen outside air introduced by the first fan (121).
8. The kitchen ventilation device according to any one of claims 1-6, characterized in that, Also includes: The second fan (122) is used to introduce air into the kitchen; The heat exchange system includes a first heat exchange unit and a second heat exchange unit that form a reversible refrigerant circulation loop. The first heat exchange unit is used to exchange heat with the outdoor air introduced by the first fan (121), and the second heat exchange unit is used to exchange heat with the indoor air introduced by the second fan (122).
9. The kitchen ventilation device according to claim 8, characterized in that, Also includes: The third heat exchange unit (151) is used to exchange heat with the kitchen air that has been heat exchanged by the second heat exchange unit (132), and the heat transfer directions of the third heat exchange unit (151) and the second heat exchange unit (132) are opposite. The housing (11) is provided with at least one air outlet (b) for discharging kitchen air that has been heat-exchanged by the third heat exchange unit (151).
10. An integrated kitchen appliance, characterized in that, include: The kitchen ventilation device (1) according to any one of claims 1-9; The range hood device (2) is located at the bottom of the kitchen ventilation device (1).