Air supply device, kitchen air conditioner, and air supply control method

Abstract

The application discloses a kind of air supply device, be configured in the kitchen air conditioner above range hood, it includes the wind shield component corresponding to being arranged at the air outlet of kitchen air conditioner, for driving wind shield component to be driven mechanism by air outlet and retract;Wind shield component is in the position of the working state of extension, so that the cold air output by air outlet is guided to the below of wind shield component and is output respectively by the downlink of wind shield component, to the uplink of wind shield component and is output, and, downlink output cold air forms the wind curtain cold air flow that range hood is extracted to block the smoke escape, uplink output cold air forms the detour cold air flow that kitchen flows around.The application further discloses kitchen air conditioner and air supply control method.The beneficial effect of the application is that, user is prevented straight blow comfort, smoke barrier and kitchen global uniform cooling are considered.

Description

Technical Field

[0001] This invention relates to an air supply device, a kitchen air conditioner, and an air supply control method, belonging to the technical field of kitchen appliances. Background Technology

[0002] As one of the core areas of family life, the kitchen is usually a compact space. During cooking, factors such as gas combustion, pot heating, and food steaming easily generate a large amount of high temperature and fumes. This places far more stringent requirements on the cooling efficiency, temperature uniformity, and coverage of air conditioning in the kitchen compared to ordinary living rooms. However, existing kitchen air conditioning technologies still have significant limitations. Most mainstream products adopt a single-direction airflow mode, such as top airflow, bottom airflow, or simple horizontal swing. Their accompanying air guide plate structure and airflow angle are often relatively fixed, resulting in an extremely singular airflow diffusion path, making it difficult to achieve comprehensive coverage of the kitchen's three-dimensional space. For example, in the technical solution disclosed in publication number CN219913217U, the air guide plate is rotatably connected to the air outlet, supporting only single-direction airflow. Specifically, existing technologies have a narrow range of adjustable airflow angles and weak airflow diffusion capabilities, failing to create a large-scale, uniform airflow field. Cold air tends to concentrate in a localized area below the air outlet, while in the core cooking area of ​​the kitchen, far from the outlet or obstructed, temperature dead zones and heat dissipation blind spots easily appear. This airflow organization defect directly results in slow cooling and significant differences in temperature gradients between the vertical and horizontal directions within the space, severely impacting the user's cooking experience. Summary of the Invention

[0003] The purpose of this invention is to provide an air supply device, a kitchen air conditioner, and an air supply control method to solve the problems of uneven cooling, oil fume dispersion, and poor user experience caused by the single-direction air supply of existing kitchen air conditioners. By splitting the cold air to form an air curtain cold airflow and a detour cold airflow, it takes into account the user's comfort from direct airflow, the blocking of oil fumes, and the uniform cooling of the entire kitchen area.

[0004] The present invention is achieved through the following technical solution.

[0005] An air supply device is configured in a kitchen air conditioner located above a range hood, comprising a wind deflector assembly correspondingly disposed at the air outlet of the kitchen air conditioner and a drive mechanism for driving the wind deflector assembly to extend or retract from the air outlet.

[0006] When the wind deflector is in the extended working state, its position relative to the air inlet causes the cold air output from the air outlet to be guided by the wind deflector. Part of the cold air flows towards the space below the wind deflector to form a downward output, and the other part of the cold air flows towards the space above the wind deflector to form an upward output. Furthermore, the downward output cold air forms an air curtain cold airflow that blocks the oil fumes extracted by the range hood from dissipating, and the upward output cold air forms a meandering cold airflow that flows around the kitchen.

[0007] As a further improvement of the present invention, the wind deflector assembly includes a wind deflector plate and a diffuser disposed on the back of the wind deflector plate. The diffuser plate has a diffuser air passage formed inside. The diffuser air passage has an air inlet on the back of the diffuser plate, a lower air outlet at the bottom, and an upper air outlet at the top, so that the cold air output from the air outlet and the air inlet are respectively output downward from the lower air outlet and output upward from the upper air outlet.

[0008] As a further improvement of the present invention, the split airway includes a main airway, an upward branch airway formed by the branching of the main airway, and a downward branch airway. The air inlet is formed at the end of the main airway, the upward air outlet is formed at the end of the upward branch airway, and the downward air outlet is formed at the end of the downward branch airway.

[0009] As a further improvement of the present invention, the position and vertical width of the air inlet of the distributor relative to the air outlet are adapted to allow the cold air output from the air outlet to enter the distribution channel through the air inlet in the middle part, the cold air in the upper part to be output upward through the guide of the outer wall of the distributor, and the cold air in the lower part to be output downward through the guide of the outer wall of the distributor.

[0010] As a further improvement of the present invention, the direction of the upward output cold air from the outer wall of the distributor and the direction of the upward output cold air from the upper air outlet of the distributor duct are both deflected towards the front of the kitchen air conditioner, and the direction of the downward output cold air from the outer wall of the distributor and the direction of the downward output cold air from the lower air outlet of the distributor duct are both deflected towards the front of the kitchen air conditioner.

[0011] As a further improvement of the present invention, the outer wall of the splitter forms an angle with the direction of the upward output cold air and the direction of the upward output cold air from the upper air outlet of the splitter duct, which is suitable for avoiding collision between the two upward output cold air streams. The outer wall of the splitter forms an angle with the direction of the downward output cold air and the direction of the downward output cold air from the lower air outlet of the splitter duct, which is suitable for avoiding collision between the two downward output cold air streams.

[0012] As a further improvement of the present invention, the wind deflector includes an upright body, an upper folded edge extending from the top edge of the body and bending towards the front of the kitchen air conditioner, and a lower folded edge extending from the bottom edge of the body and bending towards the front of the kitchen air conditioner. The upper folded edge is used to guide the upward flow of cold air from the upper air outlet, and the lower folded edge is used to guide the downward flow of cold air from the lower air outlet.

[0013] As a further improvement of the present invention, slide rails are respectively provided at both ends of the back of the windshield assembly. The slide rails are slidably connected to both sides of the air outlet and are driven by a drive mechanism to move so as to realize the extension and retraction of the windshield assembly.

[0014] A kitchen air conditioner, including an air supply device.

[0015] An air supply control method based on a kitchen air conditioner includes the following steps:

[0016] The windshield assembly is extended to the working state by a drive mechanism;

[0017] Turning on the kitchen air conditioner causes the cold air output from the air outlet to be guided by the air deflector to form both a curtain of cold air and a meandering cold air.

[0018] Monitor the temperature in the kitchen and accordingly control and adjust the cooling temperature and output intensity of the kitchen air conditioner.

[0019] The beneficial effects of this invention are:

[0020] The air deflector splits the cold air into two streams, one upward and one downward, preventing discomfort caused by the cold air blowing directly on the user. The downward-flowing cold air forms an air curtain in front of the range hood's baffle, blocking the overflow of fumes and preventing the user from inhaling harmful substances. It also absorbs the heat emitted by the fumes, thus cooling the area. The upward-flowing cold air forms a meandering airflow from front to back and then back to front in the kitchen. This airflow intersects with the air curtain in the user area, forming a cold air vortex that cools that area. It also evenly cools the entire kitchen environment, eliminating the temperature stratification and dead zones problems of traditional air supply methods. Attached Figure Description

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings to aid in understanding the objectives and advantages of the present invention, wherein:

[0022] Figure 1 This is a side view of the air guide assembly;

[0023] Figure 2 This is a cross-sectional schematic diagram of the air guide assembly;

[0024] Figure 3 This is a side view of the kitchen air conditioner.

[0025] Figure 4 This is a schematic diagram of the air curtain cold airflow and the detour cold airflow formed by the air guide component;

[0026] Figure 5 This is a simulation diagram of the airflow velocity in the kitchen after being guided by the air guide component.

[0027] Figure 6 This is a simulation diagram of the temperature inside the kitchen after the airflow is guided by the air guide component. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0029] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0030] Implementation method 1:

[0031] This embodiment illustrates an air supply device that balances user comfort with efficient cooling throughout the kitchen, referring to... Figures 1-6The device is configured on the kitchen air conditioner 1 located above the range hood 3. It includes a wind deflector 2 correspondingly installed at the air outlet 1a of the kitchen air conditioner 1, and a drive mechanism (not shown in the figure) for driving the wind deflector 2 to extend or retract from the air outlet 1a. The air outlet 1a of the kitchen air conditioner 1 is horizontally oriented, and the wind deflector 2 is movably connected to the edge of the air outlet 1a. Normally, it can be hidden inside the outer shell of the kitchen air conditioner 1 or close to the edge of the air outlet 1a to avoid affecting the overall aesthetics of the kitchen or accumulating grease. When the baffle assembly 2 is in the extended working state, its position relative to the air inlet 2a causes the cold air output from the air outlet 1a to be guided by the baffle assembly 2. Part of the cold air flows downwards towards the space below the baffle assembly 2 to form a downward output, while the other part flows upwards towards the space above the baffle assembly 2 to form an upward output. This diversion setting changes the drawbacks of traditional kitchen air conditioners 1 that cause local overcooling or dead zones in the far end due to unidirectional airflow. Specifically, the downward-output cold air is blown towards the range hood 3 under the guidance of the baffle assembly 2, forming a continuous and relatively thick air curtain cold airflow r1 on the front side of the range hood 3's smoke baffle, i.e., the side facing the user. This air curtain cold airflow r1 can effectively block the oil fume particles that escape from the front side of the smoke baffle due to smoke disturbance or pressure fluctuation during the extraction of oil fumes by the range hood 3, preventing the user from inhaling harmful substances. On the other hand, because the cold air itself is at a low temperature, it reacts with the high-temperature oil fumes. Upon contact, it can quickly absorb a large amount of radiant and convective heat carried by the fumes, which is equivalent to setting up a dynamic cooling zone in the path of the fumes, significantly reducing the temperature of the area. At the same time, the upward-output cold air is guided upward and blown out by the wind deflector 2, first impacting the kitchen ceiling or roof surface, and then flowing away from the range hood 3 along the roof plane. After encountering the opposite wall, it flows down along the wall, forming a large circular and meandering cold airflow r2 in the kitchen space from front to back and then from back to front. This meandering cold airflow r2 will eventually converge with the downward air curtain cold airflow r1 near the user's area, forming a stable cold air vortex zone. This ensures that the user's cooking position is always surrounded by a low-temperature air mass, avoiding the discomfort of cold air blowing directly on the body. In addition, the meandering cold airflow r2 achieves uniform temperature regulation of the entire kitchen environment, eliminating the temperature stratification and dead zone problems of traditional air supply methods.

[0032] Specific reference Figure 5Using fluid dynamics simulation technology, the velocity distribution, velocity gradient changes, and velocity differences in different regions of the annular airflow are visually presented to verify the rationality of the airflow velocity and the cooling effectiveness of the air supply device of this invention. The specific explanation is as follows: This velocity simulation diagram is based on the actual dimensions of the kitchen and the structure of the air supply device of this invention. It clearly divides the high-speed airflow region, the medium-speed airflow region, and the low-speed airflow region. Through velocity gradient markings and airflow velocity numerical labels, the airflow velocity range of different regions is clearly defined. Specifically, the area surrounding the core cooking area is a medium-speed airflow region with a moderate airflow velocity, which can quickly remove the high temperature generated during cooking while avoiding high-speed airflow from blowing away fumes and affecting cooking operations. The area near the annular air outlet is a high-speed airflow region, ensuring that the airflow has sufficient diffusion power to effectively overcome obstacles and achieve large-area coverage. The area around the kitchen boundary is a low-speed airflow region, allowing the airflow to diffuse smoothly and avoiding turbulence caused by airflow impacting walls or cabinets, ensuring a uniform temperature distribution throughout the kitchen space.

[0033] Specific reference Figure 6 Based on the same simulation model as the figure, this simulation uses coupled fluid dynamics and thermodynamics simulation technology to visually present the temperature distribution, temperature gradient changes, and temperature differences in different areas within the kitchen space under the action of the annular enveloping air supply device of this invention. This is used to verify the cooling effect, temperature uniformity, and adaptability of the air supply device to high-temperature kitchen conditions. Specifically, the temperature simulation diagram uses the actual high-temperature conditions of cooking in a kitchen as a simulation scenario, where the core cooking area generates continuous high temperatures. Combined with the air supply parameters of the annular enveloping air supply device of this invention, it clearly delineates a low-temperature comfort zone, a medium-temperature transition zone, and a high-temperature suppression zone. Temperature gradient markers and numerical temperature labels clearly define the temperature range of different areas. The area surrounding the core cooking area is a medium-temperature transition zone, where the temperature is maintained within a comfortable range for the human body, quickly suppressing the high temperatures generated during cooking and preventing the chef from feeling stuffy. The area directly above and close to the core cooking area is a high-temperature suppression zone, where the continuous enveloping air supply of the annular airflow effectively controls the diffusion of high temperatures and prevents the formation of localized heat dead zones. The area around the kitchen boundary and non-cooking areas is a low-temperature comfort zone, where the temperature is uniform and stable, achieving comfortable cooling for the entire kitchen space. The airflow velocity gradient transitions smoothly without obvious velocity abrupt changes, proving that the air supply device of the present invention can form a stable and uniform annular enveloping airflow field, effectively solving the defects of uneven airflow velocity distribution and low cooling efficiency in the core area in the prior art.

[0034] In this embodiment, the wind deflector assembly 2 includes a wind deflector 21 and a diffuser 22 disposed on the back side of the wind deflector 21. The wind deflector 21 is preferably made of a smooth-surfaced plate, and the diffuser 22 is fixed to the back side of the wind deflector 21 by a snap fastener or bolt or integrally formed therein. The diffuser 22 has a diffuser air passage c inside, which has an air inlet 2a on the back side of the diffuser 22, a lower air outlet 2b at the bottom, and an upper air outlet 2c at the top. When the wind deflector 2 extends into position, the air inlet 2a of the diffuser 22 is directly opposite the air outlet 1a of the kitchen air conditioner 1. The air outlet 1a outputs and enters the diffuser duct c, which is then automatically divided into two paths under the guidance of the inner wall of the duct. One path flows out from the lower air outlet 2b and downwards, while the other path flows out from the upper air outlet 2c and upwards. This built-in diffuser structure not only achieves physical isolation and directional delivery of cold air, but also avoids energy loss and flow disorder caused by the mixing of multiple airflows on the outside. It ensures the independence and stability of the downward air curtain and the upward detour flow, laying the structural foundation for the subsequent formation of a stable air curtain cold airflow r1 and a full-area detour cold airflow r2.

[0035] In this embodiment, the diversion air duct c includes a main air duct c1, an upward branch air duct c2 formed by the branch of the main air duct c1, and a downward branch air duct c3. The main air duct c1 serves as a channel for receiving and initially distributing cold air, and its cross-sectional area gradually converges along the airflow direction to ensure flow velocity. The air inlet 2a is formed at the end of the main air duct c1 and matches the shape of the air outlet 1a of the kitchen air conditioner 1. The upward air outlet 1a is formed at the end of the upward branch air duct c2 and faces the roof. The downward air outlet 1a is formed at the end of the downward branch air duct c3 and faces the front of the stove. After the cold air enters the main air duct c1, it naturally separates at the branching node, with one part flowing through the upward branch air duct c2 and the other part flowing through the downward branch air duct c3.

[0036] In this embodiment, the vertical width of the air inlet 2a is narrower than that of the air outlet 1a, and the top edge of the air inlet 2a is lower than the top edge of the air outlet 1a, while the bottom edge of the air inlet 2a is higher than the bottom edge of the air outlet 1a. This arrangement prevents all the cold air output from the air outlet 1a from directly entering the split air duct c. Instead, it is naturally divided into three parts: the cold air in the middle part enters the split air duct c through the air inlet 2a for internal splitting; the cold air in the upper part bypasses the top of the splitter 22 and is output directly upwards through the gap between the outer wall of the splitter 22 and the air outlet 1a; and the cold air in the lower part exits through the gap between the outer wall of the splitter 22 and the air outlet 1a. The airflow bypasses the bottom of the splitter 22 and flows directly downwards. Thus, the entire air supply device actually forms two sets of parallel upward airflows and two sets of parallel downward airflows. That is, the upward airflow inside the splitter duct c and the upward airflow flowing around it together form a compound upward flow, and the downward airflow inside the splitter duct c and the downward airflow flowing around it together form a compound downward flow. This structure of multiple parallel airflows greatly widens the effective coverage width of the airflow, avoids the problem of excessive blowing or insufficient range caused by the energy concentration of a single airflow, and also reduces the turbulence noise generated by the high-speed airflow impacting the wall of the splitter 22, thus improving the user experience.

[0037] In this embodiment, the outer wall of the splitter 22 guides the upward output cold air in direction d1, and the split air duct c guides the upward output cold air from the upper air outlet 2c in direction d2, both of which are inclined towards the front of the kitchen air conditioner 1. Similarly, the outer wall of the splitter 22 guides the downward output cold air in direction d3, and the split air duct c guides the downward output cold air from the lower air outlet 2b in direction d4, both of which are inclined towards the front of the kitchen air conditioner 1. Here, "front" refers to the direction of the kitchen air conditioner 1 towards the user's operating area when it is installed, that is, away from the range hood 3 and closer to the center of the kitchen. Through this unified forward-leaning guidance setting, whether it is the upward or downward airflow, its initial momentum direction is directed towards the main activity area of ​​the kitchen rather than the walls or cabinets. The upward airflow can reach the roof and diffuse to the other side with a shorter path, reducing energy loss along the way. The downward airflow can more directly cover the user's standing position at the front of the stove, enhancing the blocking effect of the air curtain.

[0038] In this embodiment, there is a specific angle between the flow direction d1 of the outer wall of the splitter 22 and the flow direction d2 of the outlet 1a of the splitter airway c. Specifically, the flow direction of the outer wall of the splitter 22 for the upward output cold air is at an angle to the flow direction of the upward output cold air from the upper outlet 2c of the splitter airway c. This angle ensures that the upward cold air flowing around the outside will not collide with the upward cold air output from the inside, thereby avoiding vortices and pressure losses caused by airflow collision and ensuring the overall jet length and diffusion uniformity of the upward airflow. Similarly, the splitter 22... The outer wall also forms an angle with the direction d3 of the downward output cold air and the direction d4 of the downward output cold air from the bottom outlet 2b in the split air channel c. This causes the two downward cold air streams to diverge slightly and move forward and downward, which not only expands the thickness and coverage of the air curtain cold airflow r1, but also avoids airflow collision. This angle design actually introduces a small pre-diffusion angle in the initial stage of airflow, so that the airflow field can achieve full-width coverage in the natural development process without relying on additional swing or diffuser structures, which simplifies the complexity of the device and improves the reliability of long-term operation.

[0039] In this embodiment, the wind deflector 21 specifically includes an upright body 211, an upper folded edge 212 extending from the top edge of the body 211 and bending towards the front of the kitchen air conditioner 1, and a lower folded edge 213 extending from the bottom edge of the body 211 and bending towards the front of the kitchen air conditioner 1. The bending angle of the upper folded edge 212 is consistent with the airflow direction of the upward-flowing cold air from the upper air outlet 2c, and the bending angle of the lower folded edge 213 is consistent with the airflow direction of the downward-flowing cold air from the lower air outlet 2b. In actual operation, the upward-flowing cold air ejected from the upper air outlet 2c of the diversion duct c will directly impact the inner surface of the upper folded edge 212, and... Under its guidance, the flow direction is changed, further strengthening the upward and forward deflection trend. At the same time, the upper folded edge 212 also acts like a rectifier, organizing the potentially turbulent airflow into a parallel jet. The special curved surface of the outer surface of the upper folded edge 212 can guide the upward cold air that flows around the outer wall of the splitter 22 to merge smoothly with it, avoiding airflow separation. Similarly, the lower folded edge 213 guides the cold air from the lower outlet 2b of the splitter duct c inward and guides the downward cold air from the outer wall of the splitter 22 outward, so that the two downward output cold air can be pushed forward and downward in a neat laminar flow state, forming a flat, continuous and uninterrupted air curtain cold airflow r1 in front of the user.

[0040] In this embodiment, slide rails 23 are respectively provided at both ends of the back of the wind deflector 2. The slide rails 23 are slidably connected to both sides of the air outlet 1a and are directly driven by the drive mechanism to realize the extension and retraction of the wind deflector 2. When the user turns on the kitchen air conditioner 1, the drive mechanism first pushes the wind deflector 2 out to the preset working position, and then the air conditioner fan starts to blow air. When the user turns off the air conditioner or switches to non-cooling mode, the drive mechanism retracts the wind deflector 2 to the initial position.

[0041] Implementation Method 2:

[0042] This embodiment illustrates a kitchen air conditioner integrating the air supply device of Embodiment 1, referring to... Figure 3 as well as Figure 4 The overall structure of the kitchen air conditioner 1 is adapted to the limited installation space above the range hood 3. Its outer shell integrates core components such as compressor, condenser, evaporator, throttling element and electronic control system. The air supply device is an important part of its terminal air distribution system and is electrically connected to the air conditioner's refrigeration cycle system and control system. Due to the air supply device, the kitchen air conditioner 1 breaks through the limitation of traditional kitchen air conditioners 1, which can only achieve single-direction air supply or simple swing. In the cooling mode, it can automatically activate the extension and diversion function of the wind deflector component 2, so that the cold air is output in both upward and downward directions in an orderly manner. This creates a composite airflow organization in the kitchen that includes a front air curtain and a full-area meandering flow. It not only solves the problems of oil fume blockage and rapid cooling in the cooking area, but also achieves temperature uniformity in the overall kitchen environment.

[0043] Implementation Method 3:

[0044] This embodiment illustrates an air supply control method based on kitchen air conditioner 1 in Embodiment 2, the steps of which include:

[0045] First, the wind deflector 2 is extended to the working state by the drive mechanism. This step is usually automatically executed by the air conditioner main control chip after the user sets the cooling mode.

[0046] Then the cooling cycle of the kitchen air conditioner 1 is started, so that the cold air output from the air outlet 1a is guided by the wind deflector 2 to form the air curtain cold airflow r1 and the detour cold airflow r2 respectively. At this time, the air conditioner fan runs at the preset initial speed to ensure that the two airflows can quickly establish a stable flow field.

[0047] Next, the system continuously monitors the temperature distribution in the kitchen. It can collect data through an array of temperature sensors distributed at different heights and locations in the kitchen, and correspondingly control and adjust the cooling temperature and output intensity of the kitchen air conditioner 1. For example, when the temperature in the stove area is detected to be high, the compressor frequency can be automatically increased and the output ratio of the downward air curtain can be increased to enhance the blocking and cooling effect. When the overall temperature of the kitchen has dropped to a comfortable range but there is still a temperature difference in the user's area, the upper and lower guide angles of the wind deflector 2 can be adjusted or the fan speed can be appropriately reduced to maintain the stability of the meandering flow.

[0048] This dynamic control strategy based on real-time temperature feedback enables the air supply device to adaptively adjust the airflow organization according to changes in the actual heat load of the kitchen, maximizing energy savings while ensuring cooling efficiency, and truly realizing intelligent and refined kitchen air management.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air supply device, characterized by comprising: The kitchen air conditioner (1) located above the range hood (3) includes a wind deflector (2) correspondingly disposed at the air outlet (1a) of the kitchen air conditioner (1) and a drive mechanism for driving the wind deflector (2) to extend or retract from the air outlet (1a). When the wind deflector (2) is in the extended working state, its position relative to the air inlet (2a) causes the cold air output from the air outlet (1a) to be guided by the wind deflector (2). Part of the cold air flows towards the space below the wind deflector (2) to form a downward output, and another part of the cold air flows towards the space above the wind deflector (2) to form an upward output. Furthermore, the downward output cold air forms a curtain of cold air (r1) that blocks the oil fumes extracted by the range hood (3) from dissipating, and the upward output cold air forms a meandering cold air flow (r2) that flows around the kitchen.

2. The air supply device according to claim 1, wherein The wind deflector assembly (2) includes a wind deflector plate (21) and a diffuser (22) disposed on the back side of the wind deflector plate (21). The diffuser (22) forms a diffuser air passage (c) inside. The diffuser air passage (c) has an air inlet (2a) on the back side of the diffuser (22), a lower air outlet (2b) at the bottom, and an upper air outlet (2c) at the top, so that the cold air output from the air outlet (1a) and entering the air inlet (2a) is output downward from the lower air outlet (2b) and output upward from the upper air outlet (2c).

3. The air supply device according to claim 2, wherein The diversion airway (c) includes a main airway (c1), an upward branch airway (c2) formed by the branching of the main airway (c1), and a downward branch airway (c3). The air inlet (2a) is formed at the end of the main airway (c1), the upward air outlet (1a) is formed at the end of the upward branch airway (c2), and the downward air outlet (1a) is formed at the end of the downward branch airway (c3).

4. The air supply device according to claim 2, wherein The position and vertical width of the air inlet (2a) of the splitter (22) relative to the air outlet (1a) are adapted to allow the cold air output from the air outlet (1a) to be such that the cold air in the middle part enters the split air passage (c) through the air inlet (2a), the cold air in the upper part is output upward through the guide of the outer wall of the splitter (22), and the cold air in the lower part is output downward through the guide of the outer wall of the splitter (22).

5. The air supply device according to claim 4, wherein The outer wall of the splitter (22) is inclined towards the front of the kitchen air conditioner (1) in terms of the direction (d1) of the upward output of cold air and the direction (d2) of the upward output of cold air from the upper air outlet (2c) in terms of the split air duct (c). The outer wall of the splitter (22) is inclined towards the front of the kitchen air conditioner (1) in terms of the direction (d3) of the downward output of cold air and the direction (d4) of the downward output of cold air from the lower air outlet (2b) in terms of the split air duct (c).

6. The air supply device according to claim 5, characterized in that, The outer wall of the splitter (22) forms an angle with the direction (d1) of the upward output cold air and the direction (d2) of the upward output cold air from the upper air outlet (2c) of the split air duct (c), which is suitable for avoiding collision between the two upward output cold air streams. The outer wall of the splitter (22) forms an angle with the direction (d3) of the downward output cold air and the direction (d4) of the downward output cold air from the lower air outlet (2b) of the split air duct (c), which is suitable for avoiding collision between the two downward output cold air streams.

7. The air supply device according to claim 4, wherein The wind deflector (21) includes an upright body (211), an upper folded edge (212) extending from the top edge of the body (211) and bending towards the front of the kitchen air conditioner (1), and a lower folded edge (213) extending from the bottom edge of the body (211) and bending towards the front of the kitchen air conditioner (1). The upper folded edge (212) is used to guide the upward flow of cold air from the upper air outlet (2c), and the lower folded edge (213) is used to guide the downward flow of cold air from the lower air outlet (2b).

8. The air supply device according to any one of claims 1 to 7, characterized in that The wind deflector assembly (2) has slide rails (23) at both ends of its back. The slide rails (23) are slidably connected to both sides of the air outlet (1a) and are driven by the drive mechanism to extend and retract the wind deflector assembly (2).

9. A kitchen air conditioner (1), characterized in that, Includes the air supply device according to any one of claims 1-8.

10. An air supply control method characterized by, Based on the kitchen air conditioner (1) of claim 9, the steps include: The windshield assembly (2) is extended to the working state by the drive mechanism; When the kitchen air conditioner (1) is turned on, the cold air output from the air outlet (1a) is guided by the wind deflector (2) to form the air curtain cold airflow (r1) and the detour cold airflow (r2). The temperature in the kitchen is monitored and the cooling temperature and output intensity of the kitchen air conditioner (1) are adjusted accordingly.

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