Kitchen ventilation device, kitchen integrated equipment and control method

Abstract

The kitchen ventilation device comprises a machine shell, a first fan, a second fan and a heat exchange system, wherein the first fan, the second fan and the heat exchange system are arranged in the machine shell; the first fan is used for introducing air outside a kitchen, the second fan is used for introducing air inside the kitchen, the heat exchange system comprises a first heat exchange unit and a second heat exchange unit which form a refrigerant reversible circulation loop, and the first heat exchange unit is used for exchanging heat with the air outside the kitchen introduced by the first fan; the second heat exchange unit is used for carrying out heat exchange with air in the kitchen introduced by the second fan; the machine shell is provided with at least one air curtain opening used for outputting air outside the kitchen subjected to heat exchange through the first heat exchange unit and forming an air curtain. The invention further discloses room integrated equipment based on the kitchen ventilation device and a control method. The air curtain has the beneficial effects that the air outside the kitchen forming the air curtain is heated or cooled, so that the temperature of the air curtain is in a state suitable for a user.

Description

Technical Field

[0001] The present invention relates to a kitchen ventilation device, kitchen integrated equipment and a control method, and belongs to the technical field of kitchen appliances. Background Art

[0002] When range hoods absorb cooking fumes, they can escape, leading to poor kitchen air quality and making it easy for users to inhale cooking fumes. Installing an air curtain can effectively address this problem. The air curtain blows air at extremely high speeds, creating a strong and stable airflow that forms an air curtain. This air curtain acts as an air wall to block the escape route of cooking fumes, preventing users from inhaling them and effectively improving the air quality of the kitchen environment.

[0003] Existing technology introduces outdoor air into the kitchen environment to form an air curtain, effectively isolating cooking fumes and improving air quality due to the fresher air outside. However, when used in summer or winter, the air curtain temperature is unsuitable due to excessively high or low outdoor air temperatures, reducing the user's cooking experience. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a kitchen ventilation device, kitchen integrated equipment and control method, which can heat or cool the air outside the kitchen forming an air curtain so that the temperature of the air curtain is at a state suitable for the user.

[0005] The present invention is achieved through the following technical solutions.

[0006] A kitchen ventilation device, comprising:

[0007] A casing, and a first fan, a second fan, and a heat exchange system arranged in the casing;

[0008] The first fan is used to introduce air from outside the kitchen, and the second fan is used to introduce air from inside the kitchen. The heat exchange system includes a first heat exchange unit and a second heat exchange unit forming a reversible refrigerant circulation loop. The first heat exchange unit is used to perform heat exchange with the air from outside the kitchen introduced by the first fan, and the second heat exchange unit is used to perform heat exchange with the air from inside the kitchen introduced by the second fan.

[0009] The casing is provided with at least one air curtain opening for outputting the air outside the kitchen that has undergone heat exchange through the first heat exchange unit and forming an air curtain.

[0010] As a further improvement of the present invention, the heat exchange system also includes a refrigerant pipeline and a power pump. The refrigerant pipeline connects the first heat exchange unit and the second heat exchange unit to form a refrigerant reversible circulation loop, and the power pump is used to provide power for the flow of the refrigerant medium.

[0011] As a further improvement of the present invention, the first heat exchange unit and the second heat exchange unit have a height difference, and the refrigerant circulation in one direction of the heat exchange system is realized by the gravity formed by the height difference, and the refrigerant circulation in the other direction of the heat exchange system is realized by a power pump.

[0012] As a further improvement of the present invention, it also includes:

[0013] A heater and a cooler, used for compensating heating or compensating cooling of the air outside the kitchen introduced by the first fan;

[0014] The first sensor and the second sensor are used to detect the temperature of the air in the kitchen and the temperature of the air curtain respectively, so as to provide judgment conditions for the control intervention of the heater and the cooler.

[0015] As a further improvement of the present invention, the first fan has multiple power gears, and the first sensor and the second sensor are further used to provide the first fan with judgment conditions for controlling and adjusting the power gear.

[0016] As a further improvement of the present invention, the air curtain opening is provided with a movable adjustment piece for adjusting the air opening size of the air curtain opening, and the first sensor and the second sensor are also used to provide judgment conditions for the movable adjustment of the adjustment piece.

[0017] As a further improvement of the present invention, it also includes:

[0018] a third heat exchange unit for exchanging heat with the air in the kitchen that has been heat exchanged by 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;

[0019] The casing is provided with at least one air outlet for outputting the air in the kitchen that has undergone heat exchange by the third heat exchange unit.

[0020] As a further improvement of the present invention, a range hood is provided below the kitchen ventilation device;

[0021] The air curtain opening includes at least one front air curtain opening corresponding to the front side of the range hood and at least one side air curtain opening corresponding to both sides of the range hood. The front air curtain opening and the side air curtain opening are used to form air curtains on the front side and both sides of the range hood.

[0022] As a further improvement of the present invention, it also includes:

[0023] an air curtain main pipe connected to the first fan;

[0024] The wind curtain shunt pipe has a middle portion connected to the wind curtain main pipe and two closed ends. The wind curtain shunt pipe has a front air hole connected to the front wind curtain opening and a side air hole connected to the side wind curtain opening.

[0025] A kitchen integrated device, comprising:

[0026] kitchen ventilation;

[0027] The range hood device is arranged at the bottom of the kitchen ventilation device.

[0028] A control method, based on a kitchen ventilation device, comprises the following steps:

[0029] Start the first fan to introduce air from outside the kitchen, and the air curtain is output to form an air curtain;

[0030] The temperature of the air outside the kitchen is determined, and based on the temperature of the air outside the kitchen, it is determined whether the heat exchange system enters an operating state.

[0031] As a further improvement of the present invention, the step of determining whether the heat exchange system has entered the working state based on the temperature of the air outside the kitchen includes:

[0032] 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;

[0033] When the temperature of the air outside the kitchen falls below a low temperature threshold, the second fan is started to draw air into the kitchen, and the heat exchange system enters operation. The first heat exchange unit transfers heat to the air outside the kitchen, and the air inside the kitchen transfers heat to the second heat exchange unit.

[0034] When the temperature of the air outside the kitchen is higher than the high temperature threshold, the fan is started to introduce air into the kitchen, and the heat exchange system enters the working state. In addition, the air outside the kitchen transfers heat to the first heat exchange unit, and the second heat exchange unit transfers heat to the air inside the kitchen.

[0035] As a further improvement of the present invention, when the heat exchange system enters the working state, the temperature difference between the air curtain and the air in the kitchen is determined, and the air outlet intensity of the air curtain is determined based on the temperature difference, and the temperature difference and the air outlet intensity are inversely proportional.

[0036] As a further improvement of the present invention, when the heat exchange system enters the working state, the temperature difference between the air curtain and the air in the kitchen is determined. When the temperature difference is greater than the maximum temperature difference threshold, the air outside the kitchen introduced by the first fan is preheated or precooled.

[0037] As a further improvement of the present invention, when the heat exchange system enters operation, it detects the air in the kitchen and the air curtain, and compares the temperature difference between the two with a threshold temperature difference;

[0038] If the temperature difference between the air in the kitchen and the air curtain is less than the threshold temperature difference, no compensatory heating or compensatory cooling is performed on the air outside the kitchen introduced by the first fan;

[0039] If the temperature difference between the air in the kitchen and the air curtain is not less than the threshold temperature difference, the air outside the kitchen introduced by the first fan is subjected to compensatory heating or compensatory cooling.

[0040] As a further improvement of the present invention, if the temperature difference between the air inside the kitchen and the air curtain is still not less than the threshold temperature difference after compensatory heating or compensatory cooling of the air outside the kitchen introduced by the first fan, the power level of the first fan is reduced, and the air outlet size of the air curtain is reduced.

[0041] Beneficial effects of the present invention:

[0042] 1. The heat exchange system forms a reversible refrigerant circulation loop through the first and second heat exchange units, which exchange heat with the air outside the kitchen and the air inside the kitchen respectively. This effectively achieves heat exchange between the air outside the kitchen and the air inside the kitchen, making the air curtain temperature output to the kitchen environment more suitable and improving user comfort.

[0043] 2. The heat exchange system exchanges heat between the air outside the kitchen and the air inside the kitchen, thereby improving the temperature of the air curtain, which can effectively reduce the energy consumption of the kitchen ventilation device in this embodiment and achieve energy saving effects;

[0044] 3. By arranging the first heat exchange unit and the second heat exchange unit at different levels, gravity can be used to realize the circulation of the refrigerant medium in one direction, that is, no power is required, thereby saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the objects and advantages of the present invention, wherein:

[0046] Figure 1 is a schematic diagram of the heat exchange system;

[0047] Figure 2 It is the connection diagram of the heat exchange system;

[0048] Figure 3 This is a working diagram of the heat exchange system in winter;

[0049] Figure 4 This is a schematic diagram of the heat exchange system working in summer;

[0050] Figure 5 Schematic diagram of the air curtain formed by heating or cooling the air introduced from outside the kitchen;

[0051] Figure 6 A schematic diagram of the internal structure of a kitchen ventilation device from one perspective;

[0052] Figure 7 This is a schematic diagram of the internal structure of the kitchen ventilation device from another perspective;

[0053] Figure 8 This is a schematic diagram of the arrangement of air curtains and air outlets on the kitchen ventilation device;

[0054] Figure 9 This is a schematic diagram of the air curtain tube group from one perspective;

[0055] Figure 10 This is a schematic diagram of the air curtain tube group from another perspective;

[0056] Figure 11 A schematic diagram of the steps of a control method based on a kitchen ventilation device;

[0057] Figure 12 This is a schematic diagram of kitchen integrated equipment. DETAILED DESCRIPTION

[0058] The present invention will be further described in detail below with reference to the accompanying drawings and implementation examples.

[0059] In this specification, directional terms such as up, down, left, right, front, back, front, back, top, and bottom, which are mentioned or may be mentioned, are defined relative to the configurations shown in the accompanying drawings. The terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may vary depending on the location and usage of the component. Therefore, these or other directional terms should not be construed as restrictive.

[0060] Implementation Case 1:

[0061] Reference Figures 1-9 , a kitchen ventilation device, specifically referring to Figure 6 and Figure 7 , including a casing 11, a first fan 121, a second fan 122 and a heat exchange system, and the first fan 121, the second fan 122 and the heat exchange system are all arranged in the casing 11.

[0062] In this embodiment, the first fan 121 is used to introduce the air outside the kitchen into the casing 11, and finally the air outside the kitchen is output to the kitchen environment. The air outside the kitchen is usually chosen to be outdoor air, which has a fresher air quality than the air inside the kitchen; the second fan 122 is used to introduce the air inside the kitchen into the casing 11.

[0063] 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 refrigerant reversible circulation loop; wherein the first heat exchange unit 131 is used to perform heat exchange with the air outside the kitchen introduced by the first fan 121, and the second heat exchange unit 132 is used to perform heat exchange with the air inside the kitchen introduced by the second fan 122. Figure 8 The kitchen ventilation device of this embodiment is combined with the range hood device 2. The kitchen ventilation device is arranged above the range hood device 2. The housing 11 is provided with at least one air curtain opening a. The air curtain opening a is used to output the air outside the kitchen that has undergone heat exchange by the first heat exchange unit 131 and form an air curtain. The air curtain can effectively prevent the oil smoke generated by cooking from escaping during the process of being inhaled by the range hood device 2, thereby improving the effect of absorbing oil smoke.

[0064] By introducing air from outside the kitchen, it not only creates an air curtain that blocks the escape of cooking fumes, but also effectively improves the air quality in the kitchen. However, in summer, the temperature of the air outside the kitchen is higher, resulting in a higher air curtain temperature in the kitchen. In winter, the temperature of the air outside the kitchen is lower, resulting in a lower air curtain temperature in the kitchen. This results in a relatively poor user experience.

[0065] In this embodiment, the heat exchange system exchanges heat with the air outside the kitchen and the air inside the kitchen respectively through the first heat exchange unit 131 and the second heat exchange unit 132 that form a reversible circulation loop of the refrigerant, thereby actually realizing heat exchange between the air outside the kitchen and the air inside the kitchen, making the temperature of the air curtain output to the kitchen environment more appropriate, thereby improving the comfort of users.

[0066] In addition, the heat exchange system exchanges heat between the air outside the kitchen and the air inside the kitchen, thereby improving the temperature of the air curtain, which can effectively reduce the energy consumption of the kitchen ventilation device in this embodiment and achieve the effect of saving energy.

[0067] It should be noted that the kitchen ventilation device of this embodiment is used in extreme climates. The heat exchange system 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 comfortable range for the user. Therefore, the kitchen ventilation device of this embodiment is also equipped with a preheating device and a precooling device (not shown in the figure). In the application environment of extreme climates, the air outside the kitchen introduced by the first fan 121 can be preheated or cooled, and then the air outside the kitchen and the air inside the kitchen can be heat exchanged through the heat exchange system.

[0068] Specifically, in the application environment of winter, the temperature of the air outside the kitchen is low, and the temperature of the air inside the kitchen is higher than the temperature of the air outside the kitchen. The second heat exchange unit 132 absorbs the heat of the air inside the kitchen, and through the refrigerant circulation, the first heat exchange unit 131 transfers the heat to the air outside the kitchen, which heats the air outside the kitchen, thereby increasing the temperature of the air curtain output to the kitchen environment; in the application environment of summer, the temperature of the air outside the kitchen is high, and the temperature of the air inside the kitchen is lower than the temperature of the air outside the kitchen. The first heat exchange unit 131 absorbs the heat of the air outside the kitchen, and through the refrigerant circulation, the second heat exchange unit 132 transfers the heat to the air inside the kitchen, thereby cooling the air outside the kitchen, thereby reducing the temperature output to the kitchen environment.

[0069] In the winter application environment, the first heat exchange unit 131 works as a condenser and the second heat exchange unit 132 works as an evaporator; in the summer application environment, the first heat exchange unit 131 works as an evaporator and the second heat exchange unit 132 works as a condenser.

[0070] 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, wherein the refrigerant pipe 133 connects the first heat exchange unit 131 and the second heat exchange unit 132 to form a refrigerant reversible circulation loop, and the refrigerant medium circulates in the first heat exchange unit 131, the second heat exchange unit 132 and the refrigerant pipe 133. The refrigerant medium is a refrigerant, usually Freon, and the power pump 134 is used to provide power for the flow of the refrigerant medium.

[0071] In this embodiment, the first heat exchange unit 131 and the second heat exchange unit 132 have a height difference. This height difference is overall. Therefore, when the refrigerant is in a liquid state, it flows from a higher point to a lower point due to gravity. Thus, refrigerant circulation in one direction of the heat exchange system is achieved by the gravity created by the height difference. Refrigerant circulation in the other direction of the heat exchange system is achieved by power provided by the power pump 134. By arranging the first heat exchange unit 131 and the second heat exchange unit 132 at different heights, gravity can be used to circulate the refrigerant in one direction, eliminating the need for power and thus saving energy.

[0072] It should be noted that in some implementation cases, the heat exchange system of this implementation case is used in a kitchen ventilation device, and heat exchange is performed on the air inside the kitchen and the air outside the kitchen through the first heat exchange unit 131 and the second heat exchange unit 132, and the air outside the kitchen after heat exchange is output to the kitchen environment. It is not limited to the output from the air curtain port a to form an air curtain to prevent the escape of oil smoke, but also includes using the air outside the kitchen as fresher and higher-quality new air to improve the air quality in the kitchen at a suitable temperature.

[0073] In this embodiment, the first heat exchange unit 131 is located in a higher position in the housing 11 than the second heat exchange unit 132. 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 gas to liquid, and the refrigerant in the second heat exchange unit 132 changes from liquid to gas, and the refrigerant circulates through 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 liquid to gas, and the refrigerant in the second heat exchange unit 132 changes from gas to liquid, and the refrigerant circulates through the power pump 134. Figure 3 In winter, the heat exchange system can exchange heat between the air outside the kitchen and the air inside the kitchen without providing power, thereby completing the heating of the air outside the kitchen; Figure 4 In the application environment of summer, the heat exchange system needs to start the power pump 134 to perform heat exchange between the air outside the kitchen and the air inside the kitchen, thereby completing the cooling effect on the air outside the kitchen.

[0074] In this embodiment, the heat exchange system also includes a control valve 135. The control valve 135 and the power pump 134 are arranged in parallel on the refrigerant pipe 133, thus serving as a bypass. In applications where the air curtain temperature needs to be increased, such as in winter, the control valve 135 is opened and the power pump 134 is shut off. The refrigerant in the first heat exchange unit 131 changes from gas to liquid and flows through the control valve 135 into the second heat exchange unit 132 for vaporization and circulation. In applications where the air curtain temperature needs to be lowered, 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 gas to liquid 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, the control valve 135 and the power pump 134 can be shut off. The control valve 135 can be a solenoid valve, which offers the advantages of fast response, excellent control accuracy, and high reliability.

[0075] In this embodiment, the heat exchange system further includes a controller (not shown) for controlling the activation and deactivation of the power pump 134 and the control valve 135. To increase the air curtain temperature, the controller opens the control valve 135 and deactivates the power pump 134. To decrease the air curtain temperature, the controller closes the control valve 135 and activates the power pump 134. Otherwise, the controller deactivates both the control valve 135 and the power pump 134.

[0076] 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, and based on the detection results, determining 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.

[0077] In this implementation case, refer to Figure 5 The kitchen ventilation system also includes a heater C1, a cooler C2, a first temperature sensor, and a second temperature sensor (not shown). Heater C1 and cooler C2 are used to compensate for heating or cooling the air outside the kitchen introduced by the first fan 121. Heater C1 and cooler C2 are primarily used in extreme climates, such as extremely hot or cold weather, when the first heat exchange unit 131 of the heat exchange system alone cannot control the air curtain temperature within a suitable range. In these situations, heater C1 and cooler C2 compensate for heating or cooling the introduced air outside the kitchen, thereby cooperating with the first heat exchange unit 131 to maintain the output air curtain within a suitable temperature range. The first temperature sensor and the second temperature sensor are used to detect the temperature of the kitchen air and the air curtain, respectively. The temperature difference between the two is used to determine whether heater C1 or cooler C2 should be engaged, thereby providing the conditions for determining whether heater C1 or cooler C2 should be engaged.

[0078] The heater c1 and the cooler c2 can be arranged upstream or downstream of the first heat exchange unit 131. The heater c1 can be an electric heating wire or a PTC heating element, and the cooler c2 can be a semiconductor refrigeration plate.

[0079] In this embodiment, the first fan 121 has multiple power levels. If, after compensatory heating or cooling by the heater c1 or cooler c2, the temperature difference between the kitchen air temperature and the air curtain temperature, as detected by the first and second temperature sensors, remains large, i.e., the air curtain temperature cannot be controlled to a desired temperature range, the power level of the first fan 121 is reduced, thereby reducing the flow rate of the outside air introduced by the first fan 121. This allows the introduced outside air to more fully exchange heat with the first heat exchange unit 131, the heater c1, and the cooler c2, thereby enhancing the heating or cooling effect and bringing the air curtain temperature to a desired temperature range. Therefore, the first and second temperature sensors not only provide a judgment condition for the intervention of the heater c1 and cooler c2 control, but also provide a judgment condition for the power level of the first fan 121 control.

[0080] In this embodiment, the air curtain opening a is provided with a movable adjustment plate (not shown in the figure), which is used to control the size of the air curtain opening a. The adjustment plate can be set as a rotatable blade embedded in the air curtain opening a, and the opening and closing angle is driven by a stepper motor. When the first fan 121 is reduced in power to enhance the heating or cooling effect, although the temperature of the air curtain can be controlled within a suitable temperature range, the first fan 121 sacrifices power output, which will reduce the air volume of the air curtain opening a. Therefore, the first temperature sensor and the second temperature sensor also provide a judgment condition for the movable adjustment of the adjustment plate, control the adjustment plate to reduce the size of the air curtain opening a, and increase the air outlet speed of the air curtain opening a by utilizing the Venturi effect, thereby ensuring the coverage of the air curtain to avoid the escape of oil smoke due to the reduction of the air curtain coverage.

[0081] The kitchen ventilation device of this embodiment refers to Figure 9 and Figure 10 Combined with Figure 6 and Figure 7 , and also includes an air curtain tube group 14, which connects the first fan 121 and multiple air curtain ports a. The air outside the kitchen introduced by the first fan 121 flows along the air curtain tube group 14 and is finally output from the air curtain port a to form a stable air curtain.

[0082] In this implementation case, combined with Figure 8The 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 at a position corresponding to the front side of the range hood device 2, and at least one side air curtain opening a2 is respectively provided at positions corresponding to both sides of the range hood device 2. The air curtain pipe group 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 at 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 on the front side of the range hood device 2 can prevent the oil smoke from escaping toward the user, which can effectively prevent the user from inhaling the oil smoke. The air curtains on both sides of the range hood device 2 can prevent the oil smoke from escaping to both sides. The air curtains formed by these three different positions can surround the oil smoke, improve the efficiency of the range hood device in absorbing oil smoke, and prevent the oil smoke from escaping and polluting the air quality of the kitchen environment. In addition, since the air curtain is formed by the air outside the kitchen with a suitable temperature, it can further improve the air quality in the kitchen environment and improve the comfort and experience of the user when cooking.

[0083] In addition, the hole shape of the front air curtain opening a1 and the side air curtain opening a2 is set to a laterally narrow type, which can increase the width of the air curtain to increase the blocking range of oil smoke on the one hand, and on the other hand, it can increase the wind intensity, making the blocking effect of the air curtain stronger.

[0084] In this embodiment, the position of the front air curtain opening a1 corresponding to the air curtain tube group 14 is located upstream of the side air curtain opening a2 corresponding to the air curtain tube group 14. Therefore, the wind force of the air curtain located in front of the range hood device 2 is theoretically the strongest, thereby effectively isolating the oil smoke from the user and preventing the user from inhaling oil smoke when cooking.

[0085] In this implementation case, refer to Figure 9 and Figure 10The air curtain pipe group 14 includes an air curtain main pipe 141 and an air curtain diversion pipe 142, wherein the air curtain main pipe 141 is connected to the first fan 121, the middle part of the air curtain diversion pipe 142 is connected to the air curtain main pipe 141, and both ends of the air curtain diversion pipe 142 are closed ends. The air curtain diversion pipe 142 has a front air hole 14a connected to the front air curtain opening a1 and a side air hole 14b connected to the side air curtain opening a2. The outside air introduced by the first fan 121 initially flows along the air curtain main duct 141. Upon reaching the middle of the air curtain diversion duct 142, it splits into two streams, each flowing toward the opposite ends of the air curtain diversion duct 142. The outside air first flows through the front air holes 14a and is discharged through the front air curtain opening a1, forming an air curtain located in front of the range hood assembly 2. The air then flows through the side air holes 14b and is discharged through the side air curtain opening a2, forming an air curtain located to the side of the range hood assembly 2. The combination of the air curtain main duct 141 and the air curtain diversion duct 142 simplifies the structure of the air curtain duct assembly 14 and improves the efficiency of extracting the outside air from the kitchen.

[0086] In this embodiment, the air curtain diverter duct 142 comprises a front duct 1421 extending in the left-right direction, and two side ducts 1422 connecting the left and right ends of the front duct 1421 and extending in the front-to-back direction. The middle portion of the front duct 1421 is connected to the air curtain main duct 141, and the rear ends of the two side ducts 1422 are closed ends. The front duct 1421 is positioned within the housing 11 corresponding to the front panel of the housing 11, and the two side ducts 1422 are positioned within the housing 11 corresponding to the two side panels of the housing 11. The front duct portion of the air curtain diverter duct 142 corresponds to the front panel of the housing 11, and the side duct portion corresponds to the side panels of the housing 11. This prevents the air curtain diverter duct 142 from encroaching on space within the housing 11, facilitating the layout of other functional components within the housing 11.

[0087] In this embodiment, at least one burner (not shown) is disposed below the range hood device 2, and the housing 11 is provided with a front air curtain opening a1 above at least the corresponding burner. This allows the air curtain formed by the front air curtain opening a1 to be positioned directly in front of the fumes generated by the burner, thereby enhancing the air curtain's effectiveness in blocking the fumes. Typically, a home kitchen has two burners, and accordingly, the housing 11 is provided with a front air curtain opening a1 above each of the two burners.

[0088] The kitchen ventilation device of this embodiment has a width in the left-right direction that is approximately the same as that of the range hood device 2, and a thickness in the front-to-back direction that is greater than that of the range hood device 2. Therefore, the front air curtain opening a1 is set at the front of the bottom plate of the casing 11, and the side air curtain opening a2 is set at the bottom of the side plate of the casing 11, so that the distance between the air curtain and the oil smoke at the three positions is maintained within an effective and reliable blocking range.

[0089] The kitchen ventilation system of this embodiment also includes a filter structure for filtering the air outside the kitchen introduced by the first fan 121 to prevent the introduction of air outside the kitchen, particularly dust and other particles from the outdoor air, into the kitchen environment. More specifically, the filter structure can be a filter screen, which can be mounted on the first fan 121, the air curtain duct assembly 14, or both.

[0090] The kitchen ventilation device of this embodiment refers to Figure 1 , further comprising a third heat exchange unit 151, and the air in the kitchen that has undergone heat exchange with the second heat exchange unit 132 exchanges heat with the third heat exchange unit 151, and the heat transfer directions of the third heat exchange unit 151 and the second heat exchange unit 132 are opposite, so that the temperature of the air in the kitchen introduced by the second fan 122 reaches a suitable state. Figure 8 The housing 11 is provided with at least one air outlet b for outputting the kitchen air that has been heat exchanged by the third heat exchange unit 151, so that the temperature of the kitchen environment remains appropriate. In addition, the air outlet b is provided on the front panel of the housing 11 and extends horizontally.

[0091] By providing the third heat exchange unit 151 and air outlet b, the kitchen ventilation device of this embodiment can be adapted to different application scenarios. For example, when a user is cooking in an environment generating oil smoke, air curtain port a can provide an air curtain. In summer or winter applications, the heat exchange system can provide an air curtain at a suitable temperature. Furthermore, in these applications, air outlet b can output air at a suitable temperature, allowing the user to cook without generating oil smoke. In summer or winter applications, air outlet b can output air at a suitable temperature to improve the temperature of the kitchen environment.

[0092] Reference Figure 6 and Figure 7 The casing 11 is also provided with 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 the existing technology and will not be repeated again.

[0093] 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 level of the internal components of the casing 11, reduce costs and compress the space of the internal layout.

[0094] Implementation Case 2:

[0095] A control method, referring to Figure 11 , and combined with Figures 1-8, kitchen ventilation device 1 based on implementation case 1.

[0096] The steps include:

[0097] Step S1: Start the first fan 121 to introduce air from outside the kitchen, and the air curtain outlet a outputs air to form an air curtain;

[0098] Step S2: determining the temperature of the air outside the kitchen, and determining whether the heat exchange system enters the working state based on the temperature of the air outside the kitchen.

[0099] Step S2: determining the temperature of the air outside the kitchen, and determining whether the heat exchange system is in operation based on the temperature of the air outside the kitchen, specifically includes the following three scenarios:

[0100] 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.

[0101] In scenario a, the temperature of the air outside the kitchen is detected by the temperature sensor and is found to be in a suitable state, that is, there is no need to heat or cool the air outside the kitchen through the heat exchange system. In this embodiment, the low temperature threshold is set to 16°C and the high temperature threshold is set to 30°C.

[0102] Scenario b: When the temperature of the air outside the kitchen is lower than the low temperature threshold, the second fan 122 is started 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, and the air inside the kitchen transfers heat to the second heat exchange unit 132.

[0103] In scenario b, the temperature sensor detects the air temperature outside the kitchen and finds that the air outside the kitchen is in a low temperature state, that is, below 16°C.

[0104] Scenario c: When the temperature of the air outside the kitchen is higher than the high temperature threshold, the fan is started 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.

[0105] In scenario c, the temperature sensor detects the air temperature outside the kitchen and finds that the air outside the kitchen is at a high temperature, that is, above 30°C.

[0106] The control method of this implementation case, when corresponding to scenario b or scenario c, further includes the following steps:

[0107] Step S3: When the heat exchange system enters the working state, the air in the kitchen and the air curtain are detected, and the temperature difference between the two is compared with the threshold temperature difference. If the temperature difference between the air in the kitchen and the air curtain is less than the threshold temperature difference, the air outside the kitchen introduced by the first fan 121 is not compensated for by heating or cooling; if the temperature difference between the air in the kitchen and the air curtain is not less than the threshold temperature difference, the air outside the kitchen introduced by the first fan 121 is compensated for by heating or cooling.

[0108] In step S3, the first temperature sensor and the second temperature sensor are used to detect the temperature Tn of the air in the kitchen and the temperature Ts of the air curtain, and the temperature difference ΔT between the temperature Tn of the air and the temperature Ts of the air curtain is determined. Then, the temperature difference ΔT is compared with the threshold temperature difference to determine whether the heater or cooler needs to intervene to compensate for heating or cooling the air outside the kitchen.

[0109] The control method of this implementation case, when corresponding to scenario b or scenario c, further includes the following steps:

[0110] Step S4: If the temperature difference between the air in the kitchen and the air curtain is still not less than the threshold temperature difference after compensatory heating or compensatory cooling of the air outside the kitchen introduced by the first fan 121, the power level of the first fan 121 is reduced, and the air outlet size of the air curtain opening a is reduced.

[0111] In step S4, after compensatory heating or compensatory cooling, the temperature difference ΔT is still not less than the threshold temperature difference. The power level of the first fan 121 is reduced to reduce the flow rate of the air outside the kitchen, thereby making the heat exchange between the air outside the kitchen and the first heat exchange unit 131 and the heater or cooler more sufficient, that is, the heating or cooling effect is improved. At the same time, the size of the air outlet of the air curtain port a is reduced, and the air outlet speed of the air curtain port a can be increased at the expense of the air volume, so as to ensure that the coverage of the air curtain is still sufficient to block the oil smoke.

[0112] Implementation Case 3:

[0113] A kitchen integrated device, referring to Figure 12 , including 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 arranged at the bottom of the kitchen ventilation device 1.

[0114] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A kitchen ventilation device, characterized in that: include: A casing (11), and a first fan (121), a second fan (122), and a heat exchange system arranged in the casing (11); The first fan (121) is used to introduce air outside the kitchen, and the second fan (122) is used to introduce air inside the kitchen. The heat exchange system comprises a first heat exchange unit (131) and a second heat exchange unit (132) forming a refrigerant reversible circulation loop. The first heat exchange unit (131) is used to perform heat exchange with the air outside the kitchen introduced by the first fan (121), and the second heat exchange unit (132) is used to perform heat exchange with the air inside the kitchen introduced by the second fan (122). The housing (11) is provided with at least one air curtain opening (a) for outputting the air outside the kitchen that has undergone heat exchange through the first heat exchange unit (131) and forming an air curtain.

2. The kitchen ventilation device according to claim 1, characterized in that: The heat exchange system also includes a refrigerant pipe (133) and a power pump (134), wherein the refrigerant pipe (133) connects the first heat exchange unit (131) and the second heat exchange unit (132) to form a refrigerant reversible circulation loop, and the power pump (134) is used to provide power for the flow of the refrigerant medium.

3. The kitchen ventilation device according to claim 2, characterized in that: The first heat exchange unit (131) and the second heat exchange unit (132) have a height difference, and the refrigerant circulation in one direction of the heat exchange system is achieved by the gravity formed by the height difference, and the refrigerant circulation in the other direction of the heat exchange system is achieved by the power pump (134).

4. The kitchen ventilation device according to claim 1, characterized in that: Also includes: The heater (c1) and the cooler (c2) are used to compensate heating or compensating cooling of the air outside the kitchen introduced by the first fan (121); The first sensor and the second sensor are used to detect the temperature of the air in the kitchen and the temperature of the air curtain respectively, and are used to provide judgment conditions for the control intervention of the heater (c1) and the cooler (c2).

5. The kitchen ventilation device according to claim 4, characterized in that: The first fan (121) has a plurality of power gears, and the first sensor and the second sensor are also used to provide the first fan (121) with judgment conditions for controlling and adjusting the power gear.

6. The kitchen ventilation device according to claim 5, characterized in that: The air curtain opening (a) is provided with a movable adjustment piece for adjusting the air opening size of the air curtain opening (a), and the first sensor and the second sensor are also used to provide judgment conditions for the movable adjustment of the adjustment piece.

7. The kitchen ventilation device according to claim 1, characterized in that: Also includes: a third heat exchange unit (151) for performing heat exchange on the air in the kitchen that has been heat exchanged by the second heat exchange unit (132), wherein 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 outputting the air in the kitchen that has undergone heat exchange through the third heat exchange unit (151).

8. The kitchen ventilation device according to any one of claims 1 to 7, characterized in that: A range hood device (2) is provided below the kitchen ventilation device (1); The air curtain opening (a) includes at least one front air curtain opening (a1) corresponding to the front side of the range hood and at least one side air curtain opening (a2) corresponding to both sides of the range hood. The front air curtain opening (a1) and the side air curtain opening (a2) are used to form air curtains on the front side and both sides of the range hood.

9. The kitchen ventilation device according to claim 8, characterized in that: Also includes: An air curtain main pipe (141) connected to the first air blower (121); The wind curtain shunt pipe (142) is connected to the wind curtain main pipe (141) at its middle and has closed ends at both ends. The wind curtain shunt pipe (142) has a front air hole (14a) connected to the front wind curtain opening (a1) and a side air hole (14b) connected to the side wind curtain opening (a2).

10. A kitchen integrated device, characterized in that: include: The kitchen ventilation device (1) according to any one of claims 1 to 9; A range hood device (2) is arranged at the bottom of the kitchen ventilation device (1).

11. A control method, characterized in that: Based on the kitchen ventilation device according to any one of claims 1 to 8, the steps include: Starting the first fan (121) to introduce air from outside the kitchen, and the air curtain port (a) outputs air to form an air curtain; The temperature of the air outside the kitchen is determined, and based on the temperature of the air outside the kitchen, it is determined whether the heat exchange system enters an operating state.

12. The control method according to claim 11, characterized in that: The step of judging whether the heat exchange system is in working state based on the temperature of the air outside the kitchen includes: 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; When the temperature of the air outside the kitchen is lower than a low temperature threshold, the second fan (122) is started to introduce air into the kitchen, the heat exchange system enters a working state, and the first heat exchange unit (131) transfers heat to the air outside the kitchen, and the air inside the kitchen transfers heat to the second heat exchange unit (132); In a scenario where the temperature of the air outside the kitchen is higher than a high temperature threshold, the fan is started to introduce air into the kitchen, the heat exchange system enters a 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.

13. The control method according to claim 12, characterized in that: When the heat exchange system is in operation, the air in the kitchen and the air curtain are detected, and the temperature difference between the two is compared with a threshold temperature difference; If the temperature difference between the air in the kitchen and the air curtain is less than a threshold temperature difference, no compensatory heating or compensatory cooling is performed on the air outside the kitchen introduced by the first fan (121); If the temperature difference between the air in the kitchen and the air curtain is not less than a threshold temperature difference, the air outside the kitchen introduced by the first fan (121) is subjected to compensatory heating or compensatory cooling.

14. The control method according to claim 13, characterized in that: If the temperature difference between the air inside the kitchen and the air curtain is still not less than the threshold temperature difference after the air outside the kitchen introduced by the first fan (121) is compensated for heating or cooling, the power level of the first fan (121) is reduced, and the air outlet size of the air curtain opening (a) is reduced.

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