Refrigerated range and control method thereof

Abstract

This invention relates to the field of household appliance technology and discloses a refrigerated range hood and its control method, comprising: an air conditioning assembly; a range hood assembly; and a baffle plate disposed within a fan housing and located on one side of the range hood fan. The baffle plate is connected to the top and rear of the fan housing, forming a baffle cavity with an opening facing the front of the fan housing. The baffle cavity communicates with the air outlet of a condenser fan, and the opening communicates with the front of the range hood fan. The maximum distance between the front end of the baffle plate and the rear wall of the fan housing and / or the distance between the bottom end of the baffle plate and the top of the fan housing are adjustable. This invention allows the maximum distance between the front end of the baffle plate and the rear wall of the fan housing and / or the distance between the bottom end of the baffle plate and the top of the fan housing to be adjusted according to different modes, enabling the baffle plate to balance the efficiency of hot air exhaust and oil fume absorption in different operating modes.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, specifically to a refrigeration range hood and its control method. Background Technology

[0002] A refrigerated range hood refers to a range hood equipped with an air conditioning unit. It not only functions as a range hood but also regulates the kitchen temperature, ensuring a comfortable cooking environment. The air conditioning unit includes a condenser assembly. The condenser assembly's air outlet is connected to the range hood's fan housing. The hot air, after heat exchange in the condenser assembly, is introduced into the range hood's fan and then exhausted outdoors along with the cooking fumes through the exhaust duct.

[0003] The related technology discloses an air-conditioning range hood, including an air conditioning component, a range hood component, and a flow guide. The air conditioning component has a heat exchange air outlet. The range hood component includes a range hood fan cabinet and an exhaust device installed within the fan cabinet. The fan cabinet has a fume intake end and a fume exhaust outlet. Fumes drawn into the fan cabinet from the intake end are discharged to the exhaust outlet via the exhaust device. The flow guide is installed within the fan cabinet and cooperates with the inner wall of the fan cabinet to form a flow guide cavity. The airflow inlet of the flow guide cavity is connected to the heat exchange air outlet, and the airflow outlet of the flow guide is connected to the exhaust device. The hot air discharged from the airflow outlet is discharged to the fume exhaust outlet via the exhaust device. The flow guide prevents hot air and fumes from colliding, reduces hot air exhaust resistance, and ensures the fume extraction effect of the range hood component. However, the flow guide is fixed, and it cannot simultaneously achieve high efficiency in both hot air exhaust and fume absorption under different operating modes. Summary of the Invention

[0004] In view of this, the present invention provides a refrigerated range hood and its control method to solve the problem that related technologies cannot simultaneously achieve high efficiency in both hot air emission and oil fume absorption under different operating modes.

[0005] In a first aspect, the present invention provides a refrigerated range hood, comprising: Air conditioning components, including condenser fans; A range hood assembly is located below the air conditioning assembly. The range hood assembly includes a fan cabinet and a range hood fan, with the range hood fan located inside the fan cabinet. A flow guide baffle is disposed inside the air handling unit and located on one side of the range hood fan. The flow guide baffle is connected to the top and rear side of the air handling unit to form a flow guide cavity with an opening facing the front side of the air handling unit. The flow guide cavity is connected to the air outlet of the condenser fan, and the opening is connected to the front side of the range hood fan. The maximum distance between the front end of the flow guide baffle and the rear side wall of the air handling unit and / or the distance between the bottom end of the flow guide baffle and the top of the air handling unit are adjustable.

[0006] Beneficial effects: The baffle plate connects to the top and rear of the fan unit, forming a baffle cavity with an opening facing the front of the fan unit. This structural design can directionally guide the hot air discharged from the condenser fan, ensuring that the hot air can be accurately guided to the front of the fan and drawn in by the fan, reducing heat loss. By adjusting the maximum distance between the front end of the baffle plate and the rear wall of the fan unit and / or the distance between the bottom end of the baffle plate and the top of the fan unit, the maximum distance between the front end of the baffle plate and the rear wall of the fan unit and / or the distance between the bottom end of the baffle plate and the top of the fan unit can be adjusted according to different modes, so that the baffle plate can balance the efficiency of hot air exhaust and oil fume absorption in different operating modes.

[0007] In one optional embodiment, the cooling range hood has a single air conditioning mode. In the single air conditioning mode, the maximum distance between the front end of the guide baffle and the rear side wall of the air handling unit is L1, where 0.55L≤L1≤0.75L, and L is the distance between the front and rear side walls of the air handling unit. And / or, the distance between the bottom end of the flow guide baffle and the top of the blower is H1, 0.65H≤H1≤0.95H, where H is the height of the blower.

[0008] In one optional embodiment, the refrigeration range hood has a single range hood mode, in which the maximum distance between the front end of the guide baffle and the rear side wall of the air handling unit is L2, L2≤L, where L is the distance between the front and rear side walls of the air handling unit. And / or, the distance between the bottom end of the flow guide baffle and the top of the blower is H2, 0.5H≤H2≤0.65H, where H is the height of the blower.

[0009] In one optional embodiment, the cooling range hood has a dual-opening mode, wherein in the dual-opening mode, the maximum distance between the front end of the baffle plate and the rear side wall of the air handling unit is L3, 0.55L≤L3≤0.75L, where L is the distance between the front and rear side walls of the air handling unit. And / or, the distance between the bottom end of the flow guide baffle and the top of the blower is H3, 0.5H≤H3≤0.75H, where H is the height of the blower.

[0010] In one optional implementation, the cooling range hood has a single air conditioning mode and a single range hood mode; In the single air conditioning mode, the maximum distance between the front end of the baffle and the rear side wall of the air handling unit is L1, 0.55L≤L1≤0.75L, where L is the distance between the front and rear side walls of the air handling unit; and / or, the distance between the bottom end of the baffle and the top of the air handling unit is H1, 0.65H≤H1≤0.95H, where H is the height of the air handling unit; In the single-smoke hood mode, the maximum distance between the front end of the baffle and the rear side wall of the fan cabinet is L2, L2≤L; and / or, the distance between the bottom end of the baffle and the top of the fan cabinet is H2, 0.5H≤H2≤0.65H.

[0011] In one optional implementation, the cooling range hood has a single air conditioning mode and a dual-operation mode; In the single air conditioning mode, the maximum distance between the front end of the baffle and the rear side wall of the air handling unit is L1, 0.55L≤L1≤0.75L, where L is the distance between the front and rear side walls of the air handling unit; and / or, the distance between the bottom end of the baffle and the top of the air handling unit is H1, 0.65H≤H1≤0.95H, where H is the height of the air handling unit; In the dual-opening mode, the maximum distance between the front end of the flow guide baffle and the rear side wall of the air handling unit is L3, 0.55L≤L3≤0.75L; and / or, the distance between the bottom end of the flow guide baffle and the top of the air handling unit is H3, 0.5H≤H3≤0.75H.

[0012] In one optional implementation, the cooling range hood has a single-range mode and a dual-range mode; In the single-smoke hood mode, the maximum distance between the front end of the baffle and the rear side wall of the fan cabinet is L2, L2≤L, where L is the distance between the front and rear side walls of the fan cabinet; and / or, the distance between the bottom end of the baffle and the top of the fan cabinet is H2, 0.5H≤H2≤0.65H, where H is the height of the fan cabinet; In the dual-opening mode, the maximum distance between the front end of the flow guide baffle and the rear side wall of the air handling unit is L3, 0.55L≤L3≤0.75L; and / or, the distance between the bottom end of the flow guide baffle and the top of the air handling unit is H3, 0.5H≤H3≤0.75H.

[0013] In one optional implementation, the cooling range hood has a single range hood mode, a single air conditioner mode, and a dual-mode. In the single air conditioning mode, the maximum distance between the front end of the baffle and the rear side wall of the air handling unit is L1, 0.55L≤L1≤0.75L, where L is the distance between the front and rear side walls of the air handling unit; and / or, the distance between the bottom end of the baffle and the top of the air handling unit is H1, 0.65H≤H1≤0.95H, where H is the height of the air handling unit; In the single-smoke hood mode, the maximum distance between the front end of the baffle and the rear side wall of the fan cabinet is L2, L2≤L; and / or, the distance between the bottom end of the baffle and the top of the fan cabinet is H2, 0.5H≤H2≤0.65H; In the dual-opening mode, the maximum distance between the front end of the flow guide baffle and the rear side wall of the air handling unit is L3, 0.55L≤L3≤0.75L; and / or, the distance between the bottom end of the flow guide baffle and the top of the air handling unit is H3, 0.5H≤H3≤0.75H.

[0014] Beneficial effects: In single air conditioning mode, the maximum distance L1 between the front end of the baffle and the rear wall of the air handling unit is controlled between 0.55L and 0.75L, and the distance H1 between the bottom end of the baffle and the top of the air handling unit is controlled between 0.65H and 0.95H. At this time, the baffle cavity is fully expanded in the height direction, and its front opening is precisely connected to the auxiliary air inlet of the range hood fan, so that the hot air discharged by the condenser fan can be smoothly introduced into the range hood fan through the baffle cavity, and quickly discharged to the fume exhaust outlet with the help of the exhaust power of the range hood fan. The baffle cavity expanded in the height direction can reduce the flow resistance of hot air, avoid the hot air from stagnating or flowing back in the baffle cavity, and improve the hot air exhaust efficiency. At the same time, the reasonable spacing setting can prevent the hot air from generating severe friction with the inner wall of the air handling unit, reduce wind resistance loss, and reduce the coordinated energy consumption of the air conditioning components and the range hood fan.

[0015] In single-fan mode, the maximum distance L2 between the front end of the baffle and the rear wall of the fan unit is ≤ L. The length of the baffle in the front-to-back direction is equal to or close to the distance between the front and rear walls of the fan unit, thus enclosing the baffle cavity as much as possible. The distance H2 between the bottom end of the baffle and the top of the fan unit is controlled between 0.5H and 0.65H. This parameter setting can compress the space occupied by the baffle cavity in the height direction, reduce the obstruction of the baffle cavity on the oil fume intake channel, ensure that both the main air inlet and the auxiliary air inlet of the fan can efficiently suck up oil fumes, reduce the residence time of oil fumes in the fan unit, improve the oil fume emission speed and absorption rate, and prevent oil fume escape. At the same time, the compact baffle cavity structure can reduce airflow turbulence, reduce the operating noise of the fan, and ensure the core smoke extraction performance in single-fan mode.

[0016] In the dual-mode, the maximum distance L3 between the front end of the baffle plate and the rear side wall of the air handling unit is controlled between 0.55L and 0.75L, and the distance H3 between the bottom end of the baffle plate and the top of the air handling unit is controlled between 0.5H and 0.75H. These parameters take into account both the requirements of hot air exhaust and oil fume absorption: ensuring that the baffle cavity has enough space for smooth flow of hot air and avoiding the collision of hot air and oil fumes in the air handling unit, while not excessively compressing the oil fume intake channel, ensuring that the range hood fan can efficiently absorb oil fumes and achieve synchronous and stable operation of air conditioning cooling and range hood smoke extraction.

[0017] Therefore, compared with existing fixed flow guides, the flow guide baffle of this application can dynamically adjust the size of the flow guide cavity according to the needs of different operating modes, so that the flow field characteristics of the flow guide cavity are precisely matched with the flow requirements of hot air and oil fumes, reducing airflow eddies and local pressure loss, improving the overall airflow efficiency, and reducing vibration and noise during equipment operation, thus extending the service life of the equipment.

[0018] In one alternative implementation, H1 = 0.72H and L1 = 0.64L.

[0019] In one alternative implementation, H2 = 0.63H.

[0020] In one alternative implementation, H3 = 0.63 H and L3 = 0.71 L.

[0021] In one optional embodiment, from top to bottom, the baffle plate includes a first guide plate, a second guide plate, and a third guide plate. The first guide plate is connected to the top plate of the air handling unit and extends downward. The second guide plate is located at the lower end of the first guide plate and is disposed near the volute of the range hood fan. The third guide plate is located at the lower end of the second guide plate and extends toward the side opposite to the range hood fan.

[0022] Beneficial effects: From top to bottom, the baffle plate includes a first guide plate, a second guide plate, and a third guide plate. The condenser fan's outlet exhausts hot air into the air handling unit. By connecting the first guide plate to the top plate of the air handling unit and extending downwards, the distance between the condenser fan's outlet and the second guide plate is increased. This prevents the high-speed airflow area of ​​the condenser fan from being too close to the second guide plate, which would cause excessive airflow impact loss, increased wind resistance, and lower airflow. Ideal cooling effects can be achieved without increasing airflow, avoiding increased noise. Simultaneously, the first guide plate, as the top support section of the baffle plate, enhances the installation stability of the baffle plate through its connection design with the top plate of the air handling unit. This prevents the baffle plate from shaking or deforming due to airflow impact, extending the equipment's service life. It also improves compatibility with adjustable structures, ensuring the sealing of the top of the baffle cavity and smooth airflow when adjusting height parameters such as H1, H2, and H3. The second guide plate, positioned below the first guide plate and close to the volute of the range hood fan, precisely directs the airflow guided by the flow guide cavity to the secondary air inlet, reducing airflow diffusion and loss between the flow guide cavity and the volute, and improving airflow utilization. The third guide plate, positioned below the second guide plate and horizontally positioned, seals the bottom of the flow guide cavity, preventing hot air leakage and ensuring directional airflow. Simultaneously, the third guide plate, extending towards the side opposite to the range hood fan, prevents the lower end of the flow guide baffle from obstructing the airflow path of the range hood fan. Especially in single-range hood mode, the height H2=0.63H, combined with the third guide plate's extension towards the side opposite to the range hood fan, reduces the space occupied by the flow guide cavity while ensuring that fumes smoothly converge upwards from the bottom of the air handling unit, avoiding localized airflow blockage caused by the tilting or protrusion of the lower end of the flow guide baffle, further improving fume absorption efficiency.

[0023] In one alternative embodiment, the height of the second guide plate is adjustable so that the distance between the bottom end of the flow guide baffle and the top of the blower is adjustable. And / or, at least the lengths of the second guide plate and the third guide plate are adjustable so that the distance between the front end of the flow guide baffle and the rear side wall of the air handling unit is adjustable.

[0024] Beneficial Effects: The adjustable height of the second guide plate provides a direct and efficient way to precisely adjust the distance between the bottom of the baffle and the top of the blower unit. Compared to adjusting the entire baffle, adjusting only the height of the second guide plate avoids changes in the connection between the first guide plate and the top plate of the blower unit, ensuring a stable seal between the top of the baffle cavity and the condenser fan outlet, and preventing problems such as hot air leakage and poor airflow caused by overall adjustment. The adjustable lengths of at least the second and third guide plates provide a flexible way to precisely adjust the distance between the front end of the baffle and the rear wall of the blower unit, and are highly compatible with the structural characteristics of the segmented guide plates. The second guide plate is close to the volute of the range hood fan, and the third guide plate is horizontally positioned below the second guide plate. Their lengths directly determine the extension distance of the front end of the baffle. By adjusting their lengths, the position of the front opening of the baffle cavity can be precisely controlled, achieving precise docking with the secondary air inlet of the range hood fan.

[0025] In one optional embodiment, the second guide plate includes a first fixing part and at least one first telescopic plate stacked with the first fixing part. The lower end of the first telescopic plate is connected to the third guide plate. The first telescopic plate is connected to a first driving mechanism, which is used to drive the first telescopic plate to extend or retract in the vertical direction.

[0026] Beneficial effects: The second guide plate includes a first fixed part and at least one first telescopic plate stacked with the first fixed part. The lower end of the first telescopic plate is connected to the third guide plate. The first telescopic plate is connected to a first driving mechanism. Therefore, when the first driving mechanism drives the first telescopic plate to extend or retract in the vertical direction, it will simultaneously drive the third guide plate to extend or retract, thereby adjusting the distance between the bottom end of the guide baffle and the top of the air handling unit.

[0027] In one optional embodiment, the second guide plate further includes at least one second telescopic plate stacked with the first fixing part, the second telescopic plate being connected to a second driving mechanism, the second driving mechanism being used to drive the second telescopic plate to extend or retract in the front-back direction. And / or, the first guide plate includes a second fixing part and at least one third telescopic plate stacked with the second fixing part, the third telescopic plate is connected to a third driving mechanism, the third driving mechanism is used to drive the third telescopic plate to extend or retract in the front-back direction; And / or, the third guide plate includes a third fixing part and at least one fourth telescopic plate stacked with the third fixing part, the fourth telescopic plate being connected to a fourth driving mechanism, the fourth driving mechanism being used to drive the fourth telescopic plate to extend or retract in the front-rear direction.

[0028] Beneficial effects: The second guide plate also includes at least one second telescopic plate stacked with the first fixed part. The second telescopic plate is connected to a second driving mechanism, which drives the second telescopic plate to extend or retract in the front-back direction, thereby adjusting the length of the second guide plate in the front-back direction. The first guide plate includes a second fixed part and at least one third telescopic plate stacked with the second fixed part. The third telescopic plate is connected to a third driving mechanism, which drives the third telescopic plate to extend or retract in the front-back direction, thereby adjusting the length of the first guide plate in the front-back direction. The third guide plate includes a third fixed part and at least one fourth telescopic plate stacked with the third fixed part. The fourth telescopic plate is connected to a fourth driving mechanism, which drives the fourth telescopic plate to extend or retract in the front-back direction, thereby adjusting the length of the third guide plate in the front-back direction.

[0029] In one optional embodiment, the cooling range hood further includes an oil fume concentration sensor, a temperature sensor, and a controller. The oil fume concentration sensor can detect the oil fume concentration, the temperature sensor can detect the kitchen ambient temperature, and the controller is communicatively connected to the oil fume concentration sensor and the temperature sensor.

[0030] Secondly, the present invention also provides a control method for a refrigerated range hood, applied to the aforementioned refrigerated range hood, the control method comprising: Obtain the operating mode, which is one of the following: single air conditioner mode, single range hood mode, and dual-operation mode; If the operating mode is single air conditioning mode, control the baffle to extend and retract in the front-to-back direction so that the maximum distance between the front end of the baffle and the rear side wall of the air handling unit is L1, 0.55L≤L1≤0.75L, and / or control the baffle to extend and retract in the vertical direction so that the distance between the bottom end of the baffle and the top of the air handling unit is H1, 0.65H≤H1≤0.95H; If the operating mode is single-smoke hood mode, control the baffle to extend and retract in the front-to-back direction so that the maximum distance between the front end of the baffle and the rear side wall of the fan cabinet is L2, L2≤L, and / or control the baffle to extend and retract in the vertical direction so that the distance between the bottom end of the baffle and the top of the fan cabinet is H2, 0.5H≤H2≤0.65H; If the operating mode is dual-open mode, control the flow guide baffle to extend and retract in the front-to-back direction so that the maximum distance between the front end of the flow guide baffle and the rear side wall of the air handling unit is L3, 0.55L≤L3≤0.75L, and / or control the flow guide baffle to extend and retract in the vertical direction so that the distance between the bottom end of the flow guide baffle and the top of the air handling unit is H3, 0.5H≤H3≤0.75H.

[0031] In an optional implementation, if the operating mode is a dual-open mode, the control method further includes: Obtain the concentration of cooking fumes; Determine whether the concentration of cooking fumes is greater than or equal to the preset concentration; If the concentration of cooking fumes is greater than or equal to the preset concentration, determine whether the kitchen ambient temperature is less than or equal to the preset temperature. If the kitchen ambient temperature is less than or equal to the preset temperature, the flow guide baffle is controlled to retract in the vertical direction, so that the distance between the bottom end of the flow guide baffle and the top of the blower is reduced, and the flow guide baffle is controlled to extend in the front-back direction, so that the maximum distance between the front end of the flow guide baffle and the rear side wall of the blower is increased. If the kitchen ambient temperature is higher than the preset temperature, the position of the flow guide baffle remains unchanged.

[0032] In an optional implementation, if the operating mode is a dual-open mode, the control method further includes: If the concentration of cooking fumes is less than the preset concentration, determine whether the kitchen ambient temperature is less than or equal to the preset temperature. If the kitchen ambient temperature is higher than the preset temperature, the baffle plate is controlled to extend in the vertical direction to increase the distance between the bottom of the baffle plate and the top of the blower, and the baffle plate is controlled to retract in the front-back direction to reduce the maximum distance between the front of the baffle plate and the rear side wall of the blower. If the kitchen ambient temperature is less than or equal to the preset temperature, the position of the flow guide baffle remains unchanged. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a refrigerated range hood according to an embodiment of the present invention; Figure 2 for Figure 1 The image shows a front sectional view of the refrigerated range hood. Figure 3 for Figure 1 The left sectional view of the refrigerated range hood shown; Figure 4 This is a schematic diagram of the flow guide baffle. Figure 5 This is a left-side sectional view of a range hood operating under single air conditioning mode. Figure 6This is a left-side sectional view of a refrigerated range hood in single-range mode. Figure 7 This is a left-side sectional view of a cooling range hood in double-open mode; Figure 8 This is a flowchart of a control method for a refrigerated range hood according to an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures: 1. Air conditioning components; 101. Condenser fan; 1011. Condenser fan outlet; 102. Evaporator fan; 2. Range hood components; 201. Air handling unit; 202. Range hood fan; 2021. Main air inlet; 2022. Secondary air inlet; 203. Main smoke inlet; 204. Auxiliary smoke inlet; 205. Range hood exhaust duct; 206. Top smoke baffle; 207. Bottom smoke guide plate; 208. Air conditioning outlet; 3. Flow guide baffle; 301. First guide plate; 302. Second guide plate; 3021. First flow guide section; 3022. Second flow guide section; 3023. Third flow guide section; 303. Third guide plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] The related technology discloses an air-conditioning range hood, including an air conditioning component, a range hood component, and a flow guide. The air conditioning component has a heat exchange air outlet, and the range hood component includes a range hood fan cabinet and an exhaust device installed within the fan cabinet. The fan cabinet has a fume intake end and a fume exhaust outlet. Fumes drawn into the fan cabinet from the intake end are discharged to the exhaust outlet via the exhaust device. The flow guide is installed within the fan cabinet and cooperates with the inner wall of the fan cabinet to form a flow guide cavity. The airflow inlet of the flow guide cavity is connected to the heat exchange air outlet, and the airflow outlet of the flow guide is connected to the exhaust device. The hot air discharged from the airflow outlet is discharged to the fume exhaust outlet via the exhaust device. The flow guide prevents hot air and fumes from colliding, reduces hot air exhaust resistance, and ensures the fume extraction effect of the range hood component. However, the flow guide is fixed, and there is a contradiction between fume exhaust and hot air exhaust in terms of fluid dynamics, making it impossible to simultaneously achieve the efficiency of hot air exhaust and fume absorption under different operating modes.

[0041] The following is combined with Figures 1 to 8 The following describes embodiments of the present invention.

[0042] According to an embodiment of the present invention, a refrigerated range hood is provided, including an air conditioning component 1, a range hood component 2, and a flow guide baffle 3.

[0043] The air conditioning component 1 includes a condenser fan 101; the range hood component 2 is located below the air conditioning component 1, and the range hood component 2 includes an air handling unit 201 and a range hood fan 202, with the range hood fan 202 located inside the air handling unit 201; the flow guide baffle 3 is located inside the air handling unit 201 and on one side of the range hood fan 202, and the flow guide baffle 3 is connected to the top and rear side of the air handling unit 201 to form a flow guide cavity with an opening facing the front side of the air handling unit 201. The flow guide cavity is connected to the air outlet 1011 of the condenser fan, and the opening is connected to the front side of the range hood fan 202. The maximum distance between the front end of the flow guide baffle 3 and the rear side wall of the air handling unit 201 and / or the distance between the bottom end of the flow guide baffle 3 and the top of the air handling unit 201 can be adjusted.

[0044] In this embodiment, the baffle 3 is connected to the top and rear of the air handling unit 201, forming a baffle cavity with an opening facing the front of the air handling unit 201. This structural design can directionally guide the hot air discharged from the condenser fan 101, ensuring that the hot air can be accurately guided to the front of the range hood fan 202 and drawn in by the range hood fan 202, reducing hot air loss. By making the maximum distance between the front end of the baffle 3 and the rear wall of the air handling unit 201 and / or the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 adjustable, the maximum distance between the front end of the baffle 3 and the rear wall of the air handling unit 201 and / or the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 can be adjusted according to different modes, so that the baffle can balance the efficiency of hot air discharge and oil fume absorption in different operating modes.

[0045] Specifically, the range hood fan 202 has a main air inlet 2021 located at the rear and a secondary air inlet 2022 located at the front. The opening of the guide cavity is connected to the secondary air inlet 2022. Therefore, hot air is mainly drawn into the range hood fan 202 through the secondary air inlet 2022, while oil fumes are mainly drawn into the range hood fan 202 through the main air inlet 2021.

[0046] It should be noted that, in combination Figure 3 In this embodiment, the front side specifically refers to the side closest to the person when standing next to the stove and facing the range hood, and the rear side specifically refers to the side furthest from the person.

[0047] In one embodiment, the rear and bottom of the flow guide cavity are closed, while the front is open. The closed rear and bottom prevent hot air and fumes from mixing outside the flow guide cavity, avoiding increased exhaust resistance due to airflow turbulence, and further improving the stability and smoothness of airflow.

[0048] In one embodiment, the cooling range hood has a single air conditioning mode. In the single air conditioning mode, the maximum distance between the front end of the baffle 3 and the rear side wall of the air handling unit 201 is L1, 0.55L≤L1≤0.75L, where L is the distance between the front and rear side walls of the air handling unit 201; and / or, the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 is H1, 0.65H≤H1≤0.95H, where H is the height of the air handling unit 201.

[0049] In this embodiment, under single air conditioning mode, the maximum distance L1 between the front end of the baffle 3 and the rear side wall of the air handling unit 201 is controlled between 0.55L and 0.75L, and / or the distance H1 between the bottom end of the baffle 3 and the top of the air handling unit 201 is controlled between 0.65H and 0.95H. At this time, the baffle cavity is fully enlarged in the height direction, and its front opening is precisely connected to the auxiliary air inlet 2022 of the range hood fan 202, so that the hot air discharged by the condenser fan 101 can be smoothly introduced into the range hood fan 202 through the baffle cavity, and quickly discharged to the fume exhaust outlet with the help of the exhaust power of the range hood fan 202. The baffle cavity enlarged in the height direction can reduce the flow resistance of hot air, avoid the hot air from stagnating or flowing back in the baffle cavity, and improve the hot air exhaust efficiency; at the same time, the reasonable spacing setting can prevent the hot air from generating severe friction with the inner wall of the air handling unit 201, reduce wind resistance loss, and reduce the collaborative energy consumption of the air conditioning component 1 and the range hood fan 202.

[0050] In one embodiment, the cooling range hood has a single-range mode. In the single-range mode, the maximum distance between the front end of the baffle 3 and the rear side wall of the air handling unit 201 is L2, where L2≤L, and L is the distance between the front and rear side walls of the air handling unit 201; and / or, the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 is H2, where 0.5H≤H2≤0.65H, and H is the height of the air handling unit 201.

[0051] In this embodiment, in single-fan mode, the maximum distance L2 between the front end of the baffle 3 and the rear side wall of the fan 201 is ≤ L, and the length of the baffle 3 in the front-to-back direction is equal to or close to the distance between the front and rear side walls of the fan 201, thus enclosing the baffle cavity as much as possible. Alternatively, the distance H2 between the bottom end of the baffle 3 and the top of the fan 201 is controlled between 0.5H and 0.65H. This parameter setting can compress the space occupied by the baffle cavity in the height direction, reduce the obstruction of the baffle cavity to the fume intake channel, and ensure that both the main air inlet 2021 and the auxiliary air inlet 2022 of the fan 202 can efficiently absorb fumes, reduce the residence time of fumes in the fan 201, improve the fume emission speed and absorption rate, and prevent fumes from escaping. Simultaneously, the compact baffle cavity structure can reduce airflow turbulence, reduce the operating noise of the fan, and ensure the core fume extraction performance in single-fan mode.

[0052] In one embodiment, the cooling range hood has a double-opening mode. In the double-opening mode, the maximum distance between the front end of the baffle 3 and the rear side wall of the air handling unit 201 is L3, 0.55L≤L3≤0.75L, where L is the distance between the front and rear side walls of the air handling unit 201; and / or, the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 is H3, 0.5H≤H3≤0.75H, where H is the height of the air handling unit 201.

[0053] In this embodiment, in the double-opening mode, the maximum distance L3 between the front end of the guide baffle 3 and the rear side wall of the air handling unit 201 is controlled between 0.55L and 0.75L, and / or the distance H3 between the bottom end of the guide baffle 3 and the top of the air handling unit 201 is controlled between 0.5H and 0.75H. This parameter takes into account both the requirements of hot air exhaust and oil fume absorption: it ensures that the guide cavity has enough space for the smooth flow of hot air, avoiding the collision of hot air and oil fume in the air handling unit 201, and does not excessively compress the oil fume intake channel, ensuring that the range hood fan 202 can efficiently absorb oil fumes, and realize the synchronous and stable operation of air conditioning cooling and range hood smoke extraction.

[0054] It should be noted that the dual-mode specifically refers to the simultaneous operation of the air conditioning component 1 and the range hood component 2.

[0055] Specifically, in the dual-operation mode, hot air and fumes are drawn in by the range hood fan 202 and eventually discharged through the range hood exhaust pipe 205.

[0056] In one embodiment, the cooling range hood has a single air conditioner mode and a single range hood mode. In the single air conditioner mode, the maximum distance between the front end of the baffle 3 and the rear side wall of the air handling unit 201 is L1, 0.55L≤L1≤0.75L, where L is the distance between the front and rear side walls of the air handling unit 201; and / or, the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 is H1, 0.65H≤H1≤0.95H, where H is the height of the air handling unit 201; in the single range hood mode, the maximum distance between the front end of the baffle 3 and the rear side wall of the air handling unit 201 is L2, L2≤L; and / or, the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 is H2, 0.5H≤H2≤0.65H.

[0057] In this embodiment, in single air conditioning mode, 0.55L≤L1≤0.75L, and / or 0.65H≤H1≤0.95H; in single range hood mode, L2≤L, and / or 0.5H≤H2≤0.65H, so that the flow guide baffle 3 can balance the efficiency of hot air emission and oil fume absorption in different operating modes.

[0058] In one embodiment, the cooling range hood has a single air conditioning mode and a double-opening mode; in the single air conditioning mode, the maximum distance between the front end of the baffle 3 and the rear side wall of the air handling unit 201 is L1, 0.55L≤L1≤0.75L, where L is the distance between the front and rear side walls of the air handling unit 201; and / or, the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 is H1, 0.65H≤H1≤0.95H, where H is the height of the air handling unit 201; in the double-opening mode, the maximum distance between the front end of the baffle 3 and the rear side wall of the air handling unit 201 is L3, 0.55L≤L3≤0.75L; and / or, the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 is H3, 0.5H≤H3≤0.75H.

[0059] In this embodiment, in single air conditioning mode, 0.55L≤L1≤0.75L, and / or 0.65H≤H1≤0.95H; in dual-operation mode, 0.55L≤L3≤0.75L, and / or 0.5H≤H3≤0.75H, so that the baffle plate 3 can balance the efficiency of hot air emission and oil fume absorption in different operating modes.

[0060] In one embodiment, the cooling range hood has a single-mode and a double-mode. In the single-mode, the maximum distance between the front end of the baffle 3 and the rear wall of the air handling unit 201 is L2, where L2 ≤ L, and L is the distance between the front and rear walls of the air handling unit 201. And / or, the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 is H2, where 0.5H ≤ H2 ≤ 0.65H, and H is the height of the air handling unit 201. In the double-mode, the maximum distance between the front end of the baffle 3 and the rear wall of the air handling unit 201 is L3, where 0.55L ≤ L3 ≤ 0.75L. And / or, the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 is H3, where 0.5H ≤ H3 ≤ 0.75H.

[0061] In this embodiment, in single-fan mode, L2≤L, and / or 0.5H≤H2≤0.65H; in double-fan mode, 0.55L≤L3≤0.75L, and / or 0.5H≤H3≤0.75H, so that the baffle plate 3 can balance the efficiency of hot air emission and oil fume absorption in different operating modes.

[0062] In one embodiment, the cooling range hood has a single range hood mode, a single air conditioner mode, and a dual-mode operation. In single air conditioner mode, such as... Figure 5As shown, the maximum distance between the front end of the baffle 3 and the rear wall of the air handling unit 201 is L1, 0.55L≤L1≤0.75L, where L is the distance between the front and rear walls of the air handling unit 201; and / or, the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 is H1, 0.65H≤H1≤0.95H, where H is the height of the air handling unit 201; in single-smoke hood mode, as Figure 6 As shown, the maximum distance between the front end of the baffle 3 and the rear side wall of the air handling unit 201 is L2, L2≤L; and / or, the distance between the bottom end of the baffle 3 and the top of the air handling unit 201 is H2, 0.5H≤H2≤0.65H; in double-opening mode, as Figure 7 As shown, the maximum distance between the front end of the flow guide baffle 3 and the rear side wall of the air handling unit 201 is L3, 0.55L≤L3≤0.75L; and / or, the distance between the bottom end of the flow guide baffle 3 and the top of the air handling unit 201 is H3, 0.5H≤H3≤0.75H.

[0063] In this implementation, under single air conditioning mode, the maximum distance L1 between the front end of the baffle 3 and the rear side wall of the air handling unit 201 is controlled between 0.55L and 0.75L, and the distance H1 between the bottom end of the baffle 3 and the top of the air handling unit 201 is controlled between 0.65H and 0.95H. At this time, the baffle cavity is fully enlarged in the height direction, and its front opening is precisely connected to the auxiliary air inlet 2022 of the range hood fan 202, so that the hot air discharged from the condenser fan 101 can be smoothly introduced into the range hood fan 202 through the baffle cavity, and quickly discharged to the fume exhaust outlet with the help of the exhaust power of the range hood fan 202. The baffle cavity enlarged in the height direction can reduce the flow resistance of hot air, avoid the hot air from stagnating or flowing back in the baffle cavity, and improve the hot air exhaust efficiency; at the same time, the reasonable spacing setting can prevent the hot air from generating severe friction with the inner wall of the air handling unit 201, reduce wind resistance loss, and reduce the collaborative energy consumption of the air conditioning component 1 and the range hood fan 202. In single-fan mode, the maximum distance L2 between the front end of the baffle 3 and the rear side wall of the fan 201 is less than or equal to L. The length of the baffle 3 in the front-to-back direction is equal to or close to the distance between the front and rear side walls of the fan 201, thus sealing the baffle cavity as much as possible. The distance H2 between the bottom end of the baffle 3 and the top of the fan 201 is controlled between 0.5H and 0.65H. This parameter setting can compress the space occupied by the baffle cavity in the height direction, reduce the obstruction of the baffle cavity on the oil fume intake channel, and ensure that both the main air inlet 2021 and the auxiliary air inlet 2022 of the fan 202 can efficiently absorb oil fumes, reduce the residence time of oil fumes in the fan 201, improve the oil fume emission speed and absorption rate, and prevent oil fume escape. At the same time, the compact baffle cavity structure can reduce airflow turbulence, reduce the operating noise of the fan, and ensure the core smoke extraction performance in single-fan mode. In the dual-opening mode, the maximum distance L3 between the front end of the baffle 3 and the rear side wall of the air handling unit 201 is controlled between 0.55L and 0.75L, and the distance H3 between the bottom end of the baffle 3 and the top of the air handling unit 201 is controlled between 0.5H and 0.75H. This parameter takes into account the dual requirements of hot air exhaust and oil fume absorption: it ensures that the baffle cavity has enough space for the smooth flow of hot air, avoiding the collision of hot air and oil fume in the air handling unit 201, and does not excessively compress the oil fume intake channel, ensuring that the range hood fan 202 can efficiently absorb oil fume, and realize the synchronous and stable operation of air conditioning cooling and range hood smoke extraction.

[0064] Therefore, compared with existing fixed flow guides, the flow guide baffle 3 of this application can dynamically adjust the size of the flow guide cavity according to the needs of different operating modes, so that the flow field characteristics of the flow guide cavity are precisely matched with the flow requirements of hot air and oil fumes, reducing airflow eddies and local pressure loss, improving the overall airflow efficiency, and at the same time reducing vibration and noise during equipment operation and extending the service life of the equipment.

[0065] In a preferred embodiment, in single-smoke mode, the maximum distance L2=L between the front end of the baffle 3 and the rear side wall of the fan 201, and the length of the baffle 3 in the front-back direction is equal to the distance between the front and rear side walls of the fan 201, thus sealing the baffle cavity.

[0066] In a preferred embodiment, H2 = 0.63H.

[0067] In this embodiment, when H2=0.63H, the smoke output is high and the noise is low in single-smoke machine mode.

[0068] In one specific embodiment, H=400mm and L=308mm, there are six design schemes as shown in Table 1, from d1 to d6, for the maximum distance between the front end of the flow guide baffle 3 and the rear side wall of the air handling unit 201, and the distance between the bottom end of the flow guide baffle 3 and the top of the air handling unit 201.

[0069] Table 1

[0070] Table 2 Single Smoke Hood Mode

[0071] Based on Table 2, in single-smoke hood mode, none of the six schemes d1 to d6 completely seal the hot air exhaust channel of air conditioning component 1, so there will be a hot air exhaust volume. Schemes d2 and d5 have relatively high smoke extraction volume, but scheme d5 has the highest smoke extraction volume and lower noise along the smoke hood than scheme d2, and has a high smoke extraction ratio. Therefore, scheme d5 is the optimal scheme, at which point H2=0.63H and L2=0.71L.

[0072] In a preferred embodiment, H1 = 0.72H and L1 = 0.64L.

[0073] In this embodiment, H1=0.72H and L1=0.64L. In single air conditioning mode, the heat exhaust air volume is high, the total pressure efficiency is high, and the noise is low.

[0074] Table 3 Single Air Conditioner Mode

[0075] In single air conditioning mode, the higher the exhaust heat volume and the higher the total pressure efficiency at the same noise level, the better the performance. According to Table 3, schemes d2, d4, and d6 all have good performance, with scheme d2 showing the best performance. At this time, H1=0.72H and L1=0.64L.

[0076] In a preferred embodiment, H3 = 0.63 H and L3 = 0.71 L.

[0077] In this embodiment, H3=0.63 H and L3=0.71 L. In the dual-mode, the smoke volume is high while heat dissipation is also taken into account, and the noise is relatively low.

[0078] Table 4 Dual-open mode

[0079] In the dual-mode, the main consideration is to have a high smoke volume under the same noise level, while also taking into account heat dissipation. According to Table 4, the better options are d1 and d5, and the optimal option is d1. At this time, H3=0.63 H and L3=0.71L.

[0080] In one embodiment, from top to bottom, the baffle 3 includes a first guide plate 301, a second guide plate 302, and a third guide plate 303. The first guide plate 301 is connected to the top plate of the air handling unit 201 and extends downward. The second guide plate 302 is located at the lower end of the first guide plate 301 and is located near the volute of the range hood fan 202. The third guide plate 303 is located at the lower end of the second guide plate 302 and extends toward the side opposite to the range hood fan 202.

[0081] In this embodiment, from top to bottom, the baffle 3 includes a first guide plate 301, a second guide plate 302, and a third guide plate 303. The air outlet 1011 of the condenser blower discharges hot air into the air handling unit 201. By connecting the first guide plate 301 to the top plate of the air handling unit 201 and extending it downward, the distance between the air outlet 1011 of the condenser blower and the second guide plate 302 can be increased. This avoids the high-speed air outlet area of ​​the condenser blower 101 being too close to the second guide plate 302, which would cause excessive airflow impact loss, increased wind resistance, and lower air volume. The ideal cooling effect can be achieved without increasing the air volume, thus avoiding increased noise. Meanwhile, the first guide plate 301, serving as the top support section of the baffle plate 3, enhances the installation stability of the baffle plate 3 by connecting with the top plate of the air handling unit 201. This prevents the baffle plate 3 from shaking or deforming due to airflow impact, extending the service life of the equipment. It also offers better compatibility with adjustable structures, ensuring the sealing and smooth flow of the top of the baffle cavity when adjusting height parameters such as H1, H2, and H3. The second guide plate 302, located below the first guide plate 301 and close to the volute of the fan 202, precisely directs the airflow guided by the baffle cavity to the secondary air inlet 2022, reducing airflow diffusion and loss between the baffle cavity and the volute, and improving airflow utilization. The third guide plate 303, located below the second guide plate 302 and horizontally positioned, seals the bottom of the baffle cavity, preventing hot air leakage and ensuring directional airflow. Meanwhile, the third guide plate 303 extending towards the side opposite to the range hood fan 202 can prevent the lower end of the guide baffle 3 from obstructing the air intake path of the range hood fan 202. Especially in the single range hood mode, the height of H2=0.63H, combined with the design of the third guide plate 303 extending towards the side opposite to the range hood fan 202, can ensure that the oil fumes can smoothly gather upward from the bottom of the air handling unit 201 while compressing the space occupied by the guide cavity, avoiding local airflow blockage caused by the tilt or protrusion of the lower end of the guide baffle 3, and further improving the oil fume absorption efficiency.

[0082] Specifically in one embodiment, such as Figure 3 and Figure 4 As shown, from top to bottom, the second guide plate 302 includes a first guide section 3021, a second guide section 3022, and a third guide section 3023. The first guide section 3021 and the second guide section 3022 are both inclined, while the third guide section 3023 is vertical. The inclination angle and length of the first guide plate 301 and the second guide plate 302 are such that the first guide plate 301, the second guide plate 302, and the third guide plate 303 are as close as possible to the volute of the smoke fan 202.

[0083] In one specific embodiment, the third guide plate 303 is horizontally positioned.

[0084] In one embodiment, the height of the second guide plate 302 is adjustable so that the distance between the bottom end of the flow guide baffle 3 and the top of the air handling unit 201 is adjustable; and / or, at least the lengths of the second guide plate 302 and the third guide plate 303 are adjustable so that the distance between the front end of the flow guide baffle 3 and the rear sidewall of the air handling unit 201 is adjustable.

[0085] In this embodiment, the height of the second guide plate 302 is adjustable, providing a direct and efficient way to precisely adjust the distance between the bottom of the baffle 3 and the top of the air handling unit 201. Compared to adjusting the baffle 3 as a whole, adjusting only the height of the second guide plate 302 avoids changes in the connection between the first guide plate 301 and the top plate of the air handling unit 201, ensuring that the sealing between the top of the flow guide cavity and the air outlet of the condenser fan 101 remains stable, and avoiding problems such as hot air leakage and poor flow due to overall adjustment. At least the lengths of the second guide plate 302 and the third guide plate 303 are adjustable, providing a flexible way to precisely adjust the distance between the front end of the baffle 3 and the rear side wall of the air handling unit 201, and is highly compatible with the structural characteristics of the segmented guide plate. The second guide plate 302 is close to the volute of the range hood fan 202, and the third guide plate 303 is horizontally set at the lower end of the second guide plate 302. The length of the two directly determines the extension distance of the front end of the guide baffle 3. By adjusting the length of the two, the position of the front opening of the guide cavity can be precisely controlled to achieve precise docking with the auxiliary air inlet 2022 of the range hood fan 202.

[0086] In one specific embodiment, from top to bottom, the second guide plate 302 includes a first guide section 3021, a second guide section 3022, and a third guide section 3023. The first guide section 3021 and the second guide section 3022 are both inclined, while the third guide section 3023 is vertically arranged. The heights of the first guide section 3021 and the second guide section 3022 remain constant, while the height of the third guide section 3023 is adjustable, thereby allowing the distance between the bottom of the guide baffle 3 and the top of the air handling unit 201 to be adjustable.

[0087] In one specific embodiment, the lengths of the second guide plate 302 and the third guide plate 303 can be adjusted, while the length of the first guide plate 301 is fixed. Since the first guide plate 301 is connected to the top wall of the air handling unit 201 and is far from the fume inlet, even if the length of the first guide plate 301 is short, it is not easy to be opposed to the fumes. When the hot air flows from top to bottom, it will be naturally drawn into the range hood fan 202.

[0088] In a preferred embodiment, the lengths of the first guide plate 301, the second guide plate 302, and the third guide plate 303 can all be adjusted, so that the distance between the front end of the flow guide baffle 3 and the rear side wall of the air handling unit 201 can be adjusted.

[0089] It should be noted that, due to the limited internal structural space of the air handling unit 201, the length that the first guide plate 301 can extend may be less than the extension lengths of the second guide plate 302 and the third guide plate 303. The extension lengths of the second guide plate 302 and the third guide plate 303 are equal. The maximum distance between the front end of the baffle plate 3 and the rear side wall of the air handling unit 201 specifically refers to the distance between the front end of the second guide plate 302 or the front end of the third guide plate 303 and the rear side wall of the air handling unit 201.

[0090] In one embodiment, the second guide plate 302 includes a first fixing part and at least one first telescopic plate stacked with the first fixing part. The lower end of the first telescopic plate is connected to the third guide plate 303. The first telescopic plate is connected to a first driving mechanism, which is used to drive the first telescopic plate to extend or retract in the vertical direction.

[0091] In this embodiment, the second guide plate 302 includes a first fixing part and at least one first telescopic plate stacked with the first fixing part. The lower end of the first telescopic plate is connected to the third guide plate 303. The first telescopic plate is connected to a first driving mechanism. Therefore, when the first driving mechanism drives the first telescopic plate to extend or retract in the vertical direction, it will simultaneously drive the third guide plate 303 to extend or retract, thereby adjusting the distance between the bottom end of the flow guide baffle 3 and the top of the air handling unit 201.

[0092] Specifically, the first drive mechanism can be a linear motor, a cylinder, etc.

[0093] More specifically, from top to bottom, the second guide plate 302 includes a first guide section 3021, a second guide section 3022, and a third guide section 3023, wherein the first guide section 3021 and the second guide section 3022 are both inclined, and the third guide section 3023 is vertically arranged. The third guide section 3023 includes a first fixing part and at least one first telescopic plate stacked with the first fixing part. The lower end of the first telescopic plate is connected to the third guide plate 303.

[0094] In an alternative embodiment, the second guide plate 302 may include a folded corrugated plate segment, and the first drive mechanism adjusts the distance between the bottom end of the flow guide baffle 3 and the top of the air handling unit 201 by stretching the second guide plate 302.

[0095] In one embodiment, the second guide plate 302 further includes at least one second telescopic plate stacked with the first fixed portion, the second telescopic plate being connected to a second driving mechanism, the second driving mechanism being used to drive the second telescopic plate to extend or retract in the front-rear direction; and / or, the first guide plate 301 includes a second fixed portion and at least one third telescopic plate stacked with the second fixed portion, the third telescopic plate being connected to a third driving mechanism, the third driving mechanism being used to drive the third telescopic plate to extend or retract in the front-rear direction; and / or, the third guide plate 303 includes a third fixed portion and at least one fourth telescopic plate stacked with the third fixed portion, the fourth telescopic plate being connected to a fourth driving mechanism, the fourth driving mechanism being used to drive the fourth telescopic plate to extend or retract in the front-rear direction.

[0096] In this embodiment, the second guide plate 302 further includes at least one second telescopic plate stacked with the first fixed portion. The second telescopic plate is connected to a second driving mechanism, which drives the second telescopic plate to extend or retract in the front-rear direction, thereby adjusting the length of the second guide plate 302 in the front-rear direction. The first guide plate 301 includes a second fixed portion and at least one third telescopic plate stacked with the second fixed portion. The third telescopic plate is connected to a third driving mechanism, which drives the third telescopic plate to extend or retract in the front-rear direction, thereby adjusting the length of the first guide plate 301 in the front-rear direction. The third guide plate 303 includes a third fixed portion and at least one fourth telescopic plate stacked with the third fixed portion. The fourth telescopic plate is connected to a fourth driving mechanism, which drives the fourth telescopic plate to extend or retract in the front-rear direction, thereby adjusting the length of the third guide plate 303 in the front-rear direction.

[0097] In a preferred embodiment, the second guide plate 302 includes a first fixing part and a second telescopic plate stacked with the first fixing part, the first guide plate 301 includes a second fixing part and a third telescopic plate stacked with the second fixing part, and the third guide plate 303 includes a third fixing part and a fourth telescopic plate stacked with the third fixing part.

[0098] It should be noted that the second telescopic plate itself includes a first fixed part and a first telescopic plate stacked with the first fixed part. When adjusting the overall height of the guide baffle 3, the two first telescopic plates extend and retract simultaneously in the vertical direction to ensure that the height of the extended second telescopic plate is consistent with the height of the first fixed part plus the first telescopic plate when adjusting the length in the front-back direction.

[0099] Specifically, the second, third, and fourth drive mechanisms can be linear motors, cylinders, etc.

[0100] Specifically, the range hood assembly 2 has a main smoke inlet 203 and an auxiliary smoke inlet 204. The fumes generated during cooking are drawn into the range hood fan 202 through the main smoke inlet 203 and the auxiliary smoke inlet 204.

[0101] In one embodiment, the cooling range hood further includes an oil fume concentration sensor, a temperature sensor, and a controller. The oil fume concentration sensor can detect the oil fume concentration, the temperature sensor can detect the kitchen ambient temperature, and the controller is communicatively connected to the oil fume concentration sensor and the temperature sensor.

[0102] In this embodiment, the oil fume concentration sensor can detect the oil fume concentration, the temperature sensor can detect the kitchen ambient temperature, and the controller is communicatively connected to the oil fume concentration sensor and the temperature sensor. It can control the position of the guide baffle 3 in real time according to the oil fume concentration and the kitchen ambient temperature, so as to take into account both oil fume absorption and cooling effects.

[0103] In one specific embodiment, the controller can retract the baffle 3 in the vertical direction when the oil fume concentration is greater than or equal to a preset concentration and the kitchen ambient temperature is less than or equal to a preset temperature, thereby reducing the distance between the bottom of the baffle 3 and the top of the air handling unit 201; and extend the baffle 3 in the front-back direction, thereby increasing the maximum distance between the front end of the baffle 3 and the rear side wall of the air handling unit 201. When the oil fume concentration is greater than or equal to a preset concentration and the kitchen ambient temperature is greater than a preset temperature, the controller can keep the position of the baffle 3 unchanged. When the oil fume concentration is less than a preset concentration and the kitchen ambient temperature is greater than a preset temperature, the controller can extend the baffle 3 in the vertical direction, thereby increasing the distance between the bottom of the baffle 3 and the top of the air handling unit 201; and retract the baffle 3 in the front-back direction, thereby reducing the maximum distance between the front end of the baffle 3 and the rear side wall of the air handling unit 201. When the oil fume concentration is less than a preset concentration and the kitchen ambient temperature is less than or equal to a preset temperature, the controller can keep the position of the baffle 3 unchanged.

[0104] According to an embodiment of the present invention, in a second aspect, a control method for a refrigerated range hood is provided, applied to the refrigerated range hood provided in the above embodiments, such as... Figure 8 As shown, the control methods include: Obtain the operating mode, which can be one of the following: single air conditioner mode, single range hood mode, or dual-operation mode; If the operating mode is single air conditioning mode, control the flow guide baffle 3 to extend and retract in the front-to-back direction so that the maximum distance between the front end of the flow guide baffle 3 and the rear side wall of the air handling unit 201 is L1, 0.55L≤L1≤0.75L, and / or control the flow guide baffle 3 to extend and retract in the vertical direction so that the distance between the bottom end of the flow guide baffle 3 and the top of the air handling unit 201 is H1, 0.65H≤H1≤0.95H; If the operating mode is single smoke hood mode, control the flow guide baffle 3 to extend and retract in the front and rear directions so that the maximum distance between the front end of the flow guide baffle 3 and the rear side wall of the air handling unit 201 is L2, L2≤L, and / or control the flow guide baffle 3 to extend and retract in the vertical direction so that the distance between the bottom end of the flow guide baffle 3 and the top of the air handling unit 201 is H2, 0.5H≤H2≤0.65H; If the operating mode is double-open mode, control the flow guide baffle 3 to extend and retract in the front-to-back direction so that the maximum distance between the front end of the flow guide baffle 3 and the rear side wall of the air handling unit 201 is L3, 0.55L≤L3≤0.75L, and / or control the flow guide baffle 3 to extend and retract in the vertical direction so that the distance between the bottom end of the flow guide baffle 3 and the top of the air handling unit 201 is H3, 0.5H≤H3≤0.75H.

[0105] In this embodiment, if the operating mode is single air conditioning mode, the guide baffle 3 is controlled to extend and retract in the front and rear directions, so that the maximum distance L1 between the front end of the guide baffle 3 and the rear side wall of the air handling unit 201 is controlled between 0.55L and 0.75L, and / or, the guide baffle 3 is controlled to extend and retract in the vertical direction, so that the distance H1 between the bottom end of the guide baffle 3 and the top of the air handling unit 201 is controlled between 0.65H and 0.95H. At this time, the guide cavity is fully expanded in the height direction, and its front opening is precisely connected to the auxiliary air inlet 2022 of the range hood fan 202, so that the hot air discharged by the condenser fan 101 can be smoothly introduced into the range hood fan 202 through the guide cavity, and quickly discharged to the oil fume outlet with the help of the exhaust power of the range hood fan 202. The enlarged flow cavity in the vertical direction can reduce the flow resistance of hot air, prevent hot air from stagnating or flowing back in the flow cavity, and improve the efficiency of hot air discharge. At the same time, the reasonable spacing setting can prevent the hot air from generating severe friction with the inner wall of the air handling unit 201, reduce wind resistance loss, and reduce the coordinated energy consumption of the air conditioning component 1 and the range hood fan 202.

[0106] If the operating mode is single-fan mode, control the expansion and contraction of the guide baffle 3 in the front-to-back direction so that the maximum distance L2 between the front end of the guide baffle 3 and the rear side wall of the air handling unit 201 is less than or equal to L. The length of the guide baffle 3 in the front-to-back direction is equal to or close to the distance between the front and rear side walls of the air handling unit 201, thus sealing the guide cavity as much as possible. And / or, control the expansion and contraction of the guide baffle 3 in the vertical direction so that the distance H2 between the bottom end of the guide baffle 3 and the top of the air handling unit 201 is controlled between 0.5H and 0.65H. This parameter setting can compress the space occupied by the guide cavity in the vertical direction, reduce the obstruction of the guide cavity on the oil fume intake channel, ensure that both the main air inlet 2021 and the auxiliary air inlet 2022 of the fan 202 can efficiently absorb oil fumes, reduce the residence time of oil fumes in the air handling unit 201, improve the oil fume emission speed and absorption rate, and prevent oil fume escape. At the same time, the compact guide cavity structure can reduce airflow turbulence, reduce the operating noise of the fan, and ensure the core smoke extraction performance in single-fan mode.

[0107] If the operating mode is double-open mode, the baffle plate 3 is controlled to extend and retract in the front and rear directions, so that the maximum distance L3 between the front end of the baffle plate 3 and the rear side wall of the air handling unit 201 is controlled between 0.55L and 0.75L, and / or, the baffle plate 3 is controlled to extend and retract in the vertical direction, so that the distance H3 between the bottom end of the baffle plate 3 and the top of the air handling unit 201 is controlled between 0.5H and 0.75H. This parameter takes into account the dual requirements of hot air exhaust and oil fume absorption: it ensures that the baffle cavity has enough space for the smooth flow of hot air, avoiding the collision of hot air and oil fume in the air handling unit 201, and does not excessively compress the oil fume intake channel, ensuring that the range hood fan 202 can efficiently suck in oil fumes, and realize the synchronous and stable operation of air conditioning cooling and range hood smoke extraction.

[0108] Therefore, compared with existing fixed flow guides, this embodiment can dynamically adjust the size of the flow guide cavity according to the needs of different operating modes, so that the flow field characteristics of the flow guide cavity are precisely matched with the flow requirements of hot air and oil fumes, reducing airflow eddies and local pressure loss, improving the overall airflow efficiency, and reducing vibration and noise during equipment operation, thus extending the service life of the equipment.

[0109] In one specific embodiment, controlling the extension and retraction of the flow guide baffle 3 in the front-to-back direction specifically refers to controlling the operation of the second, third, and fourth drive mechanisms in the above embodiment. Controlling the extension and retraction of the flow guide baffle 3 in the vertical direction specifically refers to controlling the operation of the first drive mechanism in the above embodiment.

[0110] Specifically, the refrigerated range hood includes a top smoke baffle 206 and a bottom smoke guide plate 207, and has an air conditioning outlet 208. When operating in single range hood mode, the top smoke baffle 206 and the bottom smoke guide plate 207 are rotated to open the main smoke inlet 203 and the auxiliary smoke inlet 204, and the range hood fan 202 is started.

[0111] When operating in single air conditioning mode, control the top smoke baffle 206 and the bottom smoke guide plate 207 to rotate and close the main smoke inlet 203 and the auxiliary smoke inlet 204, control the air conditioning outlet 208 to open, and control the condenser fan 101, evaporator fan 102 and compressor of air conditioning component 1 to work.

[0112] When operating in dual-mode, the top smoke baffle 206 and the bottom smoke guide plate 207 are rotated to open the main smoke inlet 203 and the auxiliary smoke inlet 204, the smoke fan 202 is started, the air conditioner outlet 208 is opened, and the condenser fan 101, the evaporator fan 102 and the compressor of the air conditioning component 1 are operated.

[0113] In one embodiment, if the operating mode is dual-open mode, the control method further includes: Obtain the concentration of cooking fumes; Determine whether the concentration of cooking fumes is greater than or equal to the preset concentration; If the concentration of cooking fumes is greater than or equal to the preset concentration, determine whether the kitchen ambient temperature is less than or equal to the preset temperature. If the kitchen ambient temperature is less than or equal to the preset temperature, control the flow guide baffle 3 to retract in the vertical direction, so that the distance between the bottom end of the flow guide baffle 3 and the top of the air handling unit 201 is reduced, and control the flow guide baffle 3 to extend in the front and back direction, so that the maximum distance between the front end of the flow guide baffle 3 and the rear side wall of the air handling unit 201 is increased. If the kitchen ambient temperature is higher than the preset temperature, the position of the flow guide baffle 3 remains unchanged.

[0114] In this embodiment, if the oil fume concentration is greater than or equal to a preset concentration and the kitchen ambient temperature is less than or equal to a preset temperature, it indicates that the kitchen temperature is suitable and the user will not feel very hot, but the oil fume concentration is relatively high. Therefore, the baffle 3 is controlled to retract vertically, reducing the distance between the bottom of the baffle 3 and the top of the fan 201. The baffle 3 is also controlled to extend horizontally, increasing the maximum distance between the front end of the baffle 3 and the rear side wall of the fan 201. This compresses the space occupied by the baffle cavity in the vertical direction, reducing the obstruction of the baffle cavity on the oil fume intake channel. This ensures that both the main air inlet 2021 and the auxiliary air inlet 2022 of the range hood fan 202 can efficiently absorb oil fumes, reducing the residence time of oil fumes in the fan 201, improving the oil fume emission speed and absorption rate, and preventing oil fume escape. If the oil fume concentration is greater than or equal to a preset concentration and the kitchen ambient temperature is greater than a preset temperature, cooling and oil fume extraction need to continue. Therefore, the position of the baffle 3 is kept unchanged.

[0115] In one embodiment, if the operating mode is dual-open mode, the control method further includes: If the concentration of cooking fumes is less than the preset concentration, determine whether the kitchen ambient temperature is less than or equal to the preset temperature. If the kitchen ambient temperature is higher than the preset temperature, control the flow guide baffle 3 to extend in the vertical direction, so that the distance between the bottom end of the flow guide baffle 3 and the top of the air handling unit 201 increases, and control the flow guide baffle 3 to retract in the front and back direction, so that the maximum distance between the front end of the flow guide baffle 3 and the rear side wall of the air handling unit 201 decreases. If the kitchen ambient temperature is less than or equal to the preset temperature, the position of the control baffle 3 remains unchanged.

[0116] In this embodiment, if the oil fume concentration is less than the preset concentration and the kitchen ambient temperature is greater than the preset temperature, it indicates that the oil fume concentration is low and the user feels hot. Therefore, the baffle 3 is controlled to extend in the vertical direction, increasing the distance between the bottom of the baffle 3 and the top of the blower 201. The baffle 3 is controlled to retract in the front-back direction, reducing the maximum distance between the front end of the baffle 3 and the rear side wall of the blower 201. The flow cavity is expanded in the height direction, preventing hot air from stagnating or flowing back in the flow cavity, improving the hot air exhaust efficiency, and thus quickly reducing the kitchen ambient temperature.

[0117] Specifically, as long as the dual-opening mode is still running, after the baffle 3 is adjusted, it is necessary to judge again whether the oil fume concentration is greater than or equal to the preset concentration.

[0118] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A refrigerated range hood, characterized in that, include: Air conditioning component (1), including condenser fan (101); A range hood assembly (2) is located below the air conditioning assembly (1). The range hood assembly (2) includes a fan cabinet (201) and a range hood fan (202). The range hood fan (202) is located inside the fan cabinet (201). A flow guide baffle (3) is disposed inside the air handling unit (201) and located on one side of the smoke hood fan (202). The flow guide baffle (3) is connected to the top and rear side of the air handling unit (201) to form a flow guide cavity with an opening facing the front side of the air handling unit (201). The flow guide cavity is connected to the air outlet (1011) of the condenser fan. The opening is connected to the front side of the smoke hood fan (202). The maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) and / or the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) can be adjusted.

2. The refrigerated range hood according to claim 1, characterized in that, The cooling range hood has a single air conditioning mode. In the single air conditioning mode, the maximum distance between the front end of the guide baffle (3) and the rear side wall of the air handling unit (201) is L1, 0.55L≤L1≤0.75L, where L is the distance between the front side wall and the rear side wall of the air handling unit (201). And / or, the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H1, 0.65H≤H1≤0.95H, where H is the height of the air handling unit (201).

3. The refrigerated range hood according to claim 1, characterized in that, The refrigeration range hood has a single range hood mode. In the single range hood mode, the maximum distance between the front end of the guide baffle (3) and the rear side wall of the air handling unit (201) is L2, L2≤L, where L is the distance between the front side wall and the rear side wall of the air handling unit (201). And / or, the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H2, 0.5H≤H2≤0.65H, where H is the height of the air handling unit (201).

4. The refrigerated range hood according to claim 1, characterized in that, The refrigeration range hood has a double-opening mode. In the double-opening mode, the maximum distance between the front end of the guide baffle (3) and the rear side wall of the air handling unit (201) is L3, 0.55L≤L3≤0.75L, where L is the distance between the front side wall and the rear side wall of the air handling unit (201). And / or, the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H3, 0.5H≤H3≤0.75H, where H is the height of the air handling unit (201).

5. The refrigerated range hood according to claim 1, characterized in that, The refrigeration range hood has a single air conditioner mode and a single range hood mode. In the single air conditioning mode, the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is L1, 0.55L≤L1≤0.75L, where L is the distance between the front and rear side walls of the air handling unit (201); and / or, the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H1, 0.65H≤H1≤0.95H, where H is the height of the air handling unit (201); In the single-smoke hood mode, the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is L2, L2≤L; and / or, the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H2, 0.5H≤H2≤0.65H.

6. The refrigerated range hood according to claim 1, characterized in that, The cooling range hood has a single air conditioning mode and a dual-operation mode; In the single air conditioning mode, the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is L1, 0.55L≤L1≤0.75L, where L is the distance between the front and rear side walls of the air handling unit (201); and / or, the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H1, 0.65H≤H1≤0.95H, where H is the height of the air handling unit (201); In the double-opening mode, the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is L3, 0.55L≤L3≤0.75L; and / or, the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H3, 0.5H≤H3≤0.75H.

7. The refrigerated range hood according to claim 1, characterized in that, The cooling range hood has a single-mode and a dual-mode operation. In the single-smoke hood mode, the maximum distance between the front end of the baffle (3) and the rear side wall of the fan cabinet (201) is L2, L2≤L, where L is the distance between the front and rear side walls of the fan cabinet (201); and / or, the distance between the bottom end of the baffle (3) and the top of the fan cabinet (201) is H2, 0.5H≤H2≤0.65H, where H is the height of the fan cabinet (201); In the double-opening mode, the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is L3, 0.55L≤L3≤0.75L; and / or, the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H3, 0.5H≤H3≤0.75H.

8. The refrigerated range hood according to claim 1, characterized in that, The cooling range hood has a single air conditioner mode, a single range hood mode, and a dual-mode mode. In the single air conditioning mode, the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is L1, 0.55L≤L1≤0.75L, where L is the distance between the front and rear side walls of the air handling unit (201); and / or, the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H1, 0.65H≤H1≤0.95H, where H is the height of the air handling unit (201); In the single-smoke hood mode, the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is L2, L2≤L; and / or, the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H2, 0.5H≤H2≤0.65H; In the double-opening mode, the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is L3, 0.55L≤L3≤0.75L; and / or, the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H3, 0.5H≤H3≤0.75H.

9. The refrigerated range hood according to any one of claims 2, 5, 6, and 8, characterized in that, H1=0.72H, L1=0.64L.

10. The refrigerated range hood according to any one of claims 3, 5, 7, and 8, characterized in that, H2 = 0.63H.

11. The refrigerated range hood according to any one of claims 4, 6, 7, and 8, characterized in that, H3=0.63 H, L3=0.71L.

12. The refrigerated range hood according to any one of claims 1 to 8, characterized in that, From top to bottom, the flow guide baffle (3) includes a first guide plate (301), a second guide plate (302) and a third guide plate (303). The first guide plate (301) is connected to the top plate of the air handling unit (201) and extends downward. The second guide plate (302) is located at the lower end of the first guide plate (301) and is located near the volute of the range hood fan (202). The third guide plate (303) is located at the lower end of the second guide plate (302) and extends toward the side away from the range hood fan (202).

13. The refrigerated range hood according to claim 12, characterized in that, The height of the second guide plate (302) is adjustable so that the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is adjustable; And / or, at least the lengths of the second guide plate (302) and the third guide plate (303) are adjustable so that the distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is adjustable.

14. The refrigerated range hood according to claim 13, characterized in that, The second guide plate (302) includes a first fixing part and at least one first telescopic plate stacked with the first fixing part. The lower end of the first telescopic plate is connected to the third guide plate (303). The first telescopic plate is connected to a first driving mechanism, which is used to drive the first telescopic plate to extend or retract in the vertical direction.

15. The refrigerated range hood according to claim 14, characterized in that, The second guide plate (302) further includes at least one second telescopic plate stacked with the first fixing part. The second telescopic plate is connected to a second driving mechanism, which is used to drive the second telescopic plate to extend or retract in the front-back direction. And / or, the first guide plate (301) includes a second fixing part and at least one third telescopic plate stacked with the second fixing part, the third telescopic plate is connected to a third driving mechanism, the third driving mechanism is used to drive the third telescopic plate to extend or retract in the front-back direction; And / or, the third guide plate (303) includes a third fixing part and at least one fourth telescopic plate stacked with the third fixing part, the fourth telescopic plate is connected to a fourth driving mechanism, the fourth driving mechanism is used to drive the fourth telescopic plate to extend or retract in the front-rear direction.

16. The refrigerated range hood according to any one of claims 1 to 8, 13 to 15, characterized in that, The cooling range hood also includes an oil fume concentration sensor, a temperature sensor, and a controller. The oil fume concentration sensor can detect the oil fume concentration, the temperature sensor can detect the kitchen ambient temperature, and the controller is communicatively connected to the oil fume concentration sensor and the temperature sensor.

17. A control method for a refrigerated range hood, characterized in that, The control method, applied to any one of claims 1 to 16, comprises: Obtain the operating mode, which is one of the following: single air conditioner mode, single range hood mode, and dual-operation mode; If the operating mode is single air conditioning mode, control the flow guide baffle (3) to extend and retract in the front-to-back direction so that the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is L1, 0.55L≤L1≤0.75L, and / or control the flow guide baffle (3) to extend and retract in the up-down direction so that the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H1, 0.65H≤H1≤0.95H; If the operating mode is single smoke machine mode, control the flow guide baffle (3) to extend and retract in the front and rear directions so that the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is L2, L2≤L, and / or control the flow guide baffle (3) to extend and retract in the vertical direction so that the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H2, 0.5H≤H2≤0.65H; If the operating mode is double-open mode, control the flow guide baffle (3) to extend and retract in the front-to-back direction so that the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is L3, 0.55L≤L3≤0.75L, and / or control the flow guide baffle (3) to extend and retract in the up-down direction so that the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is H3, 0.5H≤H3≤0.75H.

18. The control method for a refrigerated range hood according to claim 17, characterized in that, If the operating mode is dual-open mode, the control method further includes: Obtain the concentration of cooking fumes; Determine whether the concentration of cooking fumes is greater than or equal to the preset concentration; If the concentration of cooking fumes is greater than or equal to the preset concentration, determine whether the kitchen ambient temperature is less than or equal to the preset temperature. If the kitchen ambient temperature is less than or equal to the preset temperature, control the flow guide baffle (3) to retract in the vertical direction, so that the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) is reduced, and control the flow guide baffle (3) to extend in the front and back direction, so that the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) is increased. If the kitchen ambient temperature is higher than the preset temperature, the position of the flow guide baffle (3) will remain unchanged.

19. The control method for a refrigerated range hood according to claim 18, characterized in that, If the operating mode is dual-open mode, the control method further includes: If the concentration of cooking fumes is less than the preset concentration, determine whether the kitchen ambient temperature is less than or equal to the preset temperature. If the kitchen ambient temperature is greater than the preset temperature, the flow guide baffle (3) is controlled to extend in the vertical direction, so that the distance between the bottom end of the flow guide baffle (3) and the top of the air handling unit (201) increases, and the flow guide baffle (3) is controlled to retract in the front-back direction, so that the maximum distance between the front end of the flow guide baffle (3) and the rear side wall of the air handling unit (201) decreases. If the kitchen ambient temperature is less than or equal to the preset temperature, the position of the flow guide baffle (3) remains unchanged.

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