Air duct assembly, kitchen air conditioning assembly and control method

Abstract

The present application provides an air duct assembly, a kitchen air conditioning assembly and a control method. The air duct assembly includes a first air inlet channel, a second air inlet channel and a mixing channel that are connected to each other. The first air inlet channel is used to discharge hot air containing moisture; the second air inlet channel is used to discharge cooking fumes containing oil stains and dust particles, and the mixing channel is used to mix the cooking fumes with the hot air and then discharge them. In the air duct assembly provided by the present application, after the hot air containing moisture enters the first air inlet channel, the temperature of the hot air will decrease, so that the hot air forms moist air with a moisture content critically close to 90-100%. The moist air is mixed with the cooking fumes entering from the second air duct. The moist air will adsorb the particles in the cooking fumes, adsorb on the wall surface and flow downward, thereby effectively reducing the dust particles entering the common air duct.

Description

Technical Field

[0001] The present application relates to the technical field of machinery, and more particularly, to an air duct assembly, a kitchen air conditioning assembly, and a control method. Background Art

[0002] The description of the background art in the present application belongs to the related art related to the present application, and is only used to illustrate and facilitate the understanding of the application content of the present application, and should not be construed as the applicant clearly believing or presuming that the applicant believes it is the prior art on the filing date of the present application when the application is first filed.

[0003] When people cook food in the kitchen, a large amount of hot air is often generated, which makes the temperature in the kitchen higher than that in other indoor spaces. Especially in hot summer, the high temperature in the kitchen will make users feel uncomfortable. Therefore, air conditioners are usually installed in existing kitchens. To save installation space, the air conditioner and the range hood share a common exhaust duct. The air conditioner, the range hood, and the exhaust duct are connected through an air duct assembly. However, when the hot air discharged from the air conditioner and the oil fume discharged from the range hood meet in the air duct assembly, problems such as poor exhaust of one of the exhaust air or gas backflow are likely to occur. Summary of the Invention

[0004] An embodiment of the first aspect of the present application provides an air duct assembly, including a first air inlet channel, a second air inlet channel, and a mixing channel that are connected to each other. The first air inlet channel is used to discharge hot air containing moisture; the second air inlet channel is used to discharge oil fume containing oil stains and dust particles, and the mixing channel is used to mix the oil fume and the hot air and then discharge them.

[0005] In some embodiments, the air duct assembly includes a housing and an air duct. The housing has the first air inlet channel, the second air inlet channel, and the mixing channel. A communication hole is formed at the intersection of the first air inlet channel and the second air inlet channel; the air duct is arranged in the first air inlet channel, the fixed end of the air duct is connected to the inner wall of the first air inlet channel, and the free end of the air duct extends in the direction close to the mixing channel; wherein, the overlapping length of the projection of the air duct on the projection plane and the projection of the communication hole on the projection plane is D; in the direction from the fixed end to the free end, the length between the hole walls corresponding to the communication hole is H, and D / H = 1 / 3 to 2 / 3.

[0006] In some embodiments, the included angle between the axis of the first air inlet channel and the axis of the second air inlet channel is 30° to 60°.

[0007] In some embodiments, there is an annular cavity between the air duct and the wall surface of the first air inlet channel.

[0008] In some of these embodiments, a guiding inclined plane is provided on the mixing channel, and the guiding inclined plane is correspondingly arranged with the second air inlet channel.

[0009] In some of these embodiments, a protrusion is provided on the wall surface of the second air inlet channel. The protrusion is arranged adjacent to the communication hole and is located on the side away from the air duct.

[0010] An embodiment of the second aspect of the present application provides a kitchen air conditioning assembly, including: the air duct assembly described in any one of the above, the mixing channel of the air duct assembly is used to communicate with ambient air; a ceiling-mounted air conditioner, the ceiling-mounted air conditioner is communicated with the first air inlet channel of the air duct assembly through an air conditioner exhaust channel; and a range hood, the range hood is communicated with the second air inlet channel of the air duct assembly through an oil fume channel.

[0011] In some of these embodiments, the kitchen air conditioning assembly further includes: a first sensor, the first sensor is arranged in the oil fume channel and is used to detect a first parameter of the gas in the oil fume channel and send a first signal; a second sensor, the second sensor is arranged in the air conditioner exhaust channel and is used to detect a second parameter of the gas in the air conditioner exhaust channel and send a second signal; a heating device, the heating device is arranged in the air conditioner exhaust channel and the oil fume channel; and a controller, the controller is respectively connected to the first sensor, the second sensor and the heating device, and the controller controls the start and stop of the heating device according to the first signal and the second signal.

[0012] In some of these embodiments, the kitchen air conditioning assembly further includes: a wind valve, the wind valve is arranged between the oil fume channel and the air duct assembly and is respectively connected to the oil fume channel and the air duct assembly; wherein, the wind valve includes: a connection channel, the connection channel is arranged between the oil fume channel and the air duct assembly and is respectively connected to the oil fume channel and the air duct assembly; two baffles, the two baffles are arranged in the connection channel and are respectively rotatably connected to the connection channel, and the two baffles are used to open or close the connection channel; and a driving motor, the driving motor is respectively connected to the two baffles and is used to drive the baffles to rotate relative to the connection channel.

[0013] In some of these embodiments, a switching valve is arranged in the mixing channel, and the switching valve is used to control the opening or closing of the mixing channel.

[0014] An embodiment of the third aspect of the present application provides a control method for a kitchen air conditioning assembly, including the following steps: real-time detection of whether the ceiling-mounted air conditioner and the range hood are turned on;

[0015] When the range hood is not turned on and the ceiling-mounted air conditioner is turned on, control the mixing channel to open within a first preset time, and control the fan of the ceiling-mounted air conditioner to reach the maximum speed at a second preset time;

[0016] When both the range hood and the ceiling-mounted air conditioner are turned on, control the second air inlet channel to close for a third preset time and then control the second air inlet channel to open at a preset speed, and control the fan of the ceiling-mounted air conditioner to reach the maximum speed at a second preset time.

[0017] The above technical solution of the present application has the following advantages: After the hot air containing moisture enters the first air inlet channel, the temperature of the hot air will decrease, so that the hot air forms humid air with a moisture content close to 90-100% critically. This humid air is mixed with the oil fume entering from the second air inlet duct. The humid air will adsorb the particles in the oil fume, adsorb on the wall surface and flow downward, thus effectively reducing the dust particles entering the common air duct.

[0018] The additional aspects and advantages of the present application will become apparent in the following description section, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0020] Figure 1 is a schematic structural diagram of the air duct assembly described in the present application;

[0021] Figure 2 is Figure 1 an exploded structural diagram of the air duct assembly shown;

[0022] Figure 3 is Figure 1 a cross-sectional structural diagram of the air duct assembly shown;

[0023] Figure 4 is Figure 3 an enlarged structural diagram of part A in;

[0024] Figure 5 is Figure 3 an enlarged structural diagram of part B in;

[0025] Figure 6 is Figure 2 an enlarged structural diagram of part C in;

[0026] Figure 7 is Figure 1 a cross-sectional structural diagram of the air duct assembly shown in another direction;

[0027] Figure 8 is a schematic diagram of the communication hole and the air duct on the projection plane;

[0028] Figure 9 is Figure 7 Schematic diagram of the enlarged structure of part D in

[0029] Figure 10 is Figure 3 Schematic diagram of the enlarged structure of part E in ;

[0030] Figure 11 Schematic diagram of the structure of the first embodiment of the kitchen air conditioning assembly described in the present application;

[0031] Figure 12 Schematic diagram of the structure of the second embodiment of the kitchen air conditioning assembly described in the present application;

[0032] Figure 13 Schematic diagram of the structure of the first state of the air valve described in the present application;

[0033] Figure 14 is Figure 13 Exploded structure diagram of the air valve shown;

[0034] Figure 15 Schematic diagram of the structure of the second state of the air valve described in the present application.

[0035] Among them, Figures 1 to 15 The corresponding relationship between the reference numerals and the component names in is as follows:

[0036] Housing 10, first air inlet channel 11, second air inlet channel 12, mixing channel 13, communication hole 14, annular cavity 15, first half shell 16, second half shell 17, first connecting member 18, card slot 19, connecting ring 101, screw 102, positioning block 103, connecting flange 104, connecting hole 105, second connecting member 106, air duct 20, air duct assembly 100, ceiling-mounted air conditioner 200, range hood 300, first temperature sensor 400, second temperature sensor 500, heating device 600, controller 700, air valve 800, connecting channel 801, baffle 802, drive motor 803. Detailed implementation manners

[0037] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0038] Many specific details are set forth in the following description in order to fully understand the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0039] The following discussion provides multiple embodiments of the present application. Although each embodiment represents a single combination of the application, different embodiments of the present application can be replaced or combined, so the present application can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment includes A, B, and C, and another embodiment includes a combination of B and D, then the present application should also be considered to include embodiments containing one or more of all other possible combinations of A, B, C, and D, even though such embodiments may not be explicitly described in the following content.

[0040] As Figure 1 shown, an embodiment of the first aspect of the present application provides an air duct assembly 100 including a first air inlet channel 11, a second air inlet channel 12, and a mixing channel 13.

[0041] The first air inlet channel 11 is used to discharge hot air containing moisture.

[0042] The second air inlet channel 12 is used to discharge oil fume containing oil stains and dust particles.

[0043] The mixing channel 13 is used to discharge the mixture of oil fume and hot air.

[0044] For the air duct assembly provided by the present application, after the hot air containing moisture enters the first air inlet channel 11, the temperature of the hot air will decrease, so that the hot air forms humid air with a moisture content critically close to 90 - 100%. This humid air mixes with the oil fume entering from the second air duct. The humid air will adsorb the particles in the oil fume and adsorb on the wall surface and flow downward, thus effectively reducing the dust particles entering the common air duct.

[0045] As Figure 1 shown, in an embodiment of the present application, the air duct assembly 100 includes a housing 10 and an air duct 20.

[0046] The housing 10 includes a first air inlet channel 11, a second air inlet channel 12, and a mixing channel 13 that are interconnected. A communication hole 14 is formed at the intersection of the first air inlet channel 11 and the second air inlet channel 12.

[0047] As Figures 2 to 6 shown, in an embodiment of the present application, the housing 10 includes: a first half shell 16, a second half shell 17, and a first connecting member 18.

[0048] As Figure 3 and Figure 4 shown, a clamping groove 19 is provided on the mounting surface of the first half shell 16.

[0049] As Figure 3 and Figure 4 shown, the mating end of the second half shell 17 is inserted into the clamping groove 19.

[0050] As Figure 3 and Figure 5 shown, the first connecting member 18 passes through the first half shell 16 and is fixedly connected to the second half shell 17. The first connecting member 18 is connected to the first half shell 16, and the air duct 20 is located between the first half shell 16 and the second half shell 17.

[0051] During the assembly of the air duct assembly 100, first insert the mating end of the second half shell 17 into the card slot 19 to connect the second half shell 17 with the first half shell 16. Then, fix the second half shell 17 and the first half shell 16 together through the first connecting member 18. After that, fix the air duct 20 on the housing 10. The structure of the above air duct assembly 100 is simple and convenient to assemble, thus improving the assembly efficiency of the product and reducing the production and manufacturing cost of the product.

[0052] As Figure 7 shown, the included angle α between the axis of the first air inlet passage 11 and the axis of the second air inlet passage 12 is 30° to 60°.

[0053] The air duct 20 is arranged in the first air inlet passage 11. The fixed end of the air duct 20 is connected to the housing 10, and the free end of the air duct 20 extends towards the mixing passage 13.

[0054] As Figure 7 and Figure 8 shown, the overlapping length of the projection of the air duct 20 on the projection plane and the projection of the communication hole 14 on the projection plane is D; in the direction from the fixed end to the free end, the length between the corresponding hole walls of the communication hole 14 is H, and D / H = 1 / 3 to 2 / 3.

[0055] The first air flow entering from the air duct 20 is diverted to the middle and lower reaches of the housing 10. Due to the blocking effect of the air duct 20, a part of the second air flow entering from the second air inlet passage 12 hits the air duct 20 and is disrupted, and the other part of the air flow directly reaches the middle and lower reaches of the housing 10. The setting of the air duct 20 avoids the situation where the static pressure of the air flow increases due to the increase in space after the first air flow and the second air flow pass through the communication hole 14, thereby avoiding the blocking effect on the first air flow or the second air flow due to the increase in air flow static pressure, and further avoiding the situation of reverse flow or poor flow of the first air flow or the second air flow, making the first air flow and the second air flow discharged smoothly; in addition, the disrupted second air flow plays a stirring role on the first air flow and the second air flow, so that the first air flow and the second air flow are fully mixed, further avoiding the mutual interference between the first air flow and the second air flow.

[0056] If the ratio of D / H is less than 1 / 3, the length of the air duct 20 extending into the housing 10 is short. On the one hand, it cannot divert the first air flow to the middle and lower reaches of the housing 10. On the other hand, it cannot hinder the increase in the static pressure of the second air flow. If the ratio of D / H is greater than 2 / 3, the length of the air duct 20 extending into the housing 10 is long, which hinders the second air flow. Therefore, when the ratio of D / H is between 1 / 3 and 2 / 3, the mutual interference between the first air flow and the second air flow can be avoided, thereby preventing the reverse flow or poor flow of the first air flow or the second air flow, and enabling the smooth discharge of the first air flow and the second air flow.

[0057] As Figure 7 shown, in an embodiment of the present application, there is an annular cavity 15 between the air duct 20 and the wall surface of the first air inlet passage 11.

[0058] A part of the second air flow entering from the second air inlet passage 12 hits the air duct 20. This part of the second air flow surrounds the air duct 20 in the annular cavity 15 and then enters the middle and lower reaches of the housing 10 along the air duct 20. Since this part of the second air flow has a suction effect on the first air flow after surrounding the air duct 20, it accelerates the first air flow into the middle and lower reaches of the housing 10. In addition, this part of the second air flow stirs the first air flow and the second air flow, so that the first air flow and the second air flow are fully mixed, further avoiding the mutual interference between the first air flow and the second air flow.

[0059] In an embodiment of the present application, a guiding inclined surface is provided on the mixing passage, and the guiding inclined surface is correspondingly arranged with the second air inlet passage.

[0060] When the first air flow and / or the second air flow carry water vapor and oil fume, the water vapor and oil fume will condense on the inner wall of the housing to form water droplets or oil droplets. The setting of the guiding inclined surface can guide the water droplets or oil droplets out of the housing.

[0061] In an embodiment of the present application, a protrusion is provided on the wall surface of the second air inlet passage. The protrusion is adjacent to the communication hole and is located on the side away from the air duct.

[0062] When the second air flow passes through the protrusion, the second air flow forms a turbulent flow at the protrusion. The turbulent flow can disrupt the second air flow, avoiding the blocking effect of the second air flow on the first air flow after passing through the communication hole, thereby preventing the reverse flow or poor flow of the first air flow or the second air flow, and enabling the smooth discharge of the first air flow and the second air flow.

[0063] As Figure 7 shown, in an embodiment of the present application, in the direction from the fixed end to the free end, the cross-sectional area of the air duct 20 gradually decreases.

[0064] The cross-sectional area of the air duct 20 gradually decreases, which plays a role in accelerating the exclusion of the air flow through the air duct 20. The fast-flowing first-way air flow can suck the second-way air flow, thereby accelerating the entry of the second-way air flow into the middle and lower reaches of the housing 10.

[0065] As Figure 6 shown, in an embodiment of the present application, along the length direction of the card slot 19, the length of the card slot 19 located on the inner wall of the housing 10 is greater than the length of the card slot 19 located on the outer wall of the housing 10.

[0066] The first air inlet channel 11, the second air inlet channel 12, and the mixing channel 13 need to be connected to corresponding pipes, and the pipes will be sleeved on the outer surfaces of the first air inlet channel 11, the second air inlet channel 12, and the mixing channel 13. Therefore, the length of the outer wall of the housing 10 is shorter to avoid the interference of the slot wall on the pipes, so as to ensure the contact area between the pipes and the first air inlet channel 11, the second air inlet channel 12, and the mixing channel 13. And the length of the inner wall of the housing 10 is longer to ensure the contact area between the second half shell 17 and the first half shell 16, thereby ensuring the reliability of the cooperation between the second half shell 17 and the first half shell 16.

[0067] As Figure 7 and Figure 9 shown, in an embodiment of the present application, an annular connection ring 101 is provided on the outer wall surface of the air duct 20, and a fixing groove is formed between the connection ring 101 and the outer wall surface of the air duct 20.

[0068] The air inlet end of the first air inlet channel 11 is inserted into the fixing groove.

[0069] The second connecting member 106 passes through the connection ring 101 and then connects to the housing 10.

[0070] The setting of the connection ring 101 increases the contact area between the air duct 20 and the housing 10, thereby ensuring the reliability of the cooperation between the air duct 20 and the housing 10. After the air inlet end of the first air inlet channel 11 is inserted into the fixing groove, the air duct 20 and the housing 10 are fixed by the second connecting member 106, ensuring the sufficient fixation between the air duct 20 and the housing 10.

[0071] As Figure 7 and Figure 9 shown, in an embodiment of the present application, positioning blocks 103 are provided on the connection ring 101, and the positioning blocks 103 are inserted into the gap between the first air inlet channel 11 and the second air inlet channel 12.

[0072] There is an included angle between the first air inlet passage 11 and the second air inlet passage 12. Therefore, a gap is formed between the first air inlet passage 11 and the second air inlet passage 12. The positioning block 103 can be inserted into the gap, so that the air duct 20 can be quickly installed in place, thus improving the assembly efficiency of the product.

[0073] As Figure 7 and Figure 9 shown, in an embodiment of the present application, a connecting flange 104 is provided at the air inlet end of the first air inlet passage 11, and the second connecting member 106 is connected to the connecting flange 104.

[0074] The setting of the connecting flange 104 increases the contact area between the connecting ring 101 and the first air inlet passage 11, thereby ensuring the uniformity of the force between the first air inlet passage 11 and the connecting ring 101, and further ensuring the reliability of the connection between the first air inlet passage 11 and the connecting ring 101.

[0075] As Figure 3 and Figure 10 shown, in an embodiment of the present application, a connecting hole 105 is provided on the first air inlet passage 11. After the screw 102 passes through the connecting hole 105, it is screwed into the air duct 20, and the screw 102 is connected to the first air inlet passage 11.

[0076] One end of the screw 102 passes through the connecting hole 105 and is screwed into the air duct 20, and the other end of the screw 102 is connected to the first air inlet passage 11 to fixedly connect the first air inlet passage 11 and the air duct 20. The structure of the screw 102 is simple and the connection is reliable.

[0077] In an embodiment of the present application, a seal is provided between the first half shell and the second half shell.

[0078] The setting of the seal ensures the sealing between the first half shell and the second half shell, and avoids the probability of fluid leakage from the first air inlet passage, the second air inlet passage and the mixing passage.

[0079] In an embodiment of the present application, an oil-repellent coating is provided on the inner wall of the outer shell.

[0080] When the first air flow and / or the second air flow carry water vapor and oil fume, the water vapor and oil fume will condense on the inner wall of the outer shell to form water droplets or oil droplets. The oil-repellent coating can cause the water vapor and oil fume to quickly form water droplets or oil droplets, and will not stay on the inner wall of the passage, making the water droplets or oil droplets drain out of the air duct assembly more smoothly, thereby reducing the corrosion of the inner wall of the passage by the oil droplets and extending the service life of the product.

[0081] Both the first connecting member and the second connecting member can be screws.

[0082] As Figure 11As shown in the figure, the kitchen air conditioning component provided by the second aspect of the present application includes: the air duct component 100 of any one of the above, a ceiling-mounted air conditioner 200, and a range hood 300.

[0083] The mixing channel 13 of the air duct component 100 is used to communicate with the ambient air.

[0084] The ceiling-mounted air conditioner 200 is connected to the first air inlet channel 11 of the air duct component 100 through an air conditioner exhaust channel.

[0085] The range hood 300 is connected to the second air inlet channel 12 of the air duct component 100 through an oil fume channel.

[0086] In the kitchen air conditioning component provided by the present application, the hot air entering from the air duct 20 is guided to the middle and lower reaches of the housing 10. Due to the blocking effect of the air duct 20, a part of the air flow of the oil fume entering from the second air inlet channel 12 hits the air duct 20 and is disrupted, and the other part of the air flow directly reaches the middle and lower reaches of the housing 10; the setting of the air duct 20 avoids the situation where the static pressure of the air flow increases due to the increased space after the hot air and the oil fume pass through the communication hole 14, thereby avoiding the blocking effect on the hot air or the oil fume due to the increase in the static pressure of the air flow, and further avoiding the situation of the backflow or poor flow of the hot air or the oil fume, so that the hot air and the oil fume are smoothly discharged; in addition, the disrupted oil fume plays a stirring role on the hot air and the oil fume, so that the hot air and the oil fume are fully mixed, further avoiding the mutual interference between the hot air and the oil fume.

[0087] As Figure 12 shown, in an embodiment of the present application, the kitchen air conditioning component further includes: a first temperature sensor (first sensor) 400, a second temperature sensor (second sensor) 500, a heating device 600, and a controller 700.

[0088] The first temperature sensor 400 is arranged in the oil fume channel and is used to detect the temperature of the gas in the oil fume channel (first parameter) and send a first temperature signal (first signal).

[0089] The second temperature sensor 500 is arranged in the air conditioner exhaust channel and is used to detect the temperature of the gas in the air conditioner exhaust channel (second parameter) and send a second temperature signal (first signal).

[0090] The heating device 600 is arranged in the air conditioner exhaust channel and the oil fume channel.

[0091] The controller 700 is respectively connected to the first temperature sensor 400, the second temperature sensor 500, and the heating device 600. The controller 700 controls the start and stop of the heating device 600 according to the first temperature signal and the second temperature signal.

[0092] The first temperature sensor 400 detects the temperature of the gas in the oil fume passage in real time and sends a first temperature signal; the second temperature sensor 500 detects the temperature of the gas in the air exhaust passage of the air conditioner in real time and sends a second temperature signal. The controller 700 receives the first temperature signal and the second temperature signal. When the controller 700 determines, based on the first temperature signal and the second temperature signal, that the temperature of the gas in the oil fume passage is higher than the temperature of the gas in the air exhaust passage of the air conditioner, the controller 700 controls the heating device 600 in the air exhaust passage of the air conditioner to turn on and heat the gas in the air exhaust passage of the air conditioner, so that the temperature of the air entering the air duct assembly 100 from the air exhaust passage of the air conditioner is not lower than the temperature of the air in the air duct assembly 100 of the oil fume passage, avoiding the condensation of the oil and gas in the gas in the oil fume passage on the inner wall of the air duct assembly 100.

[0093] In a specific embodiment of the present application, the first sensor is an oil fume sensor, and the second sensor is a humidity sensor. When the controller determines, based on the signal fed back by the oil fume sensor, that the concentration of the oil fume is low (when the concentration of the oil fume is low, the temperature of the oil fume decreases relatively quickly), the controller controls the heating device in the oil fume passage to operate and heat the oil fume in the oil fume passage to reduce the probability of the condensation of the oil and gas in the oil fume on the inner wall of the air duct assembly. When the controller determines, based on the signal fed back by the humidity sensor, that the humidity of the air is low (when the concentration of moisture in the air is low, the temperature of the air decreases relatively quickly), the controller controls the heating device in the air exhaust passage of the air conditioner to operate and heat the air in the air exhaust passage of the air conditioner to reduce the probability of the condensation of the water vapor in the air on the inner wall of the air duct assembly.

[0094] As Figure 11 、 13 to Figure 15 shown, in an embodiment of the present application, the kitchen air conditioning assembly further includes: a wind valve 800.

[0095] The wind valve 800 is disposed between the oil fume passage and the air duct assembly 100 and is respectively connected to the oil fume passage and the air duct assembly 100.

[0096] As Figures 13 to 15 shown, the wind valve 800 includes: a connection channel 801, two baffles 802, and a drive motor 803.

[0097] The connection channel 801 is disposed between the oil fume passage and the air duct assembly 100 and is respectively connected to the oil fume passage and the air duct assembly 100.

[0098] The two baffles 802 are disposed in the connection channel 801 and are respectively rotatably connected to the connection channel 801. The two baffles 802 are used to open or close the connection channel 801.

[0099] The driving motor 803 is respectively connected to the two baffles 802, and is used to drive the baffle 802 to rotate relative to the connection channel 801. The driving motor 803 is connected to the baffle 802 through a gear.

[0100] By driving the driving motor 803, the two baffles 802 rotate relative to the connection channel 801, so as to open or close the connection channel 801. The rotation angle of the baffle 802 can also be controlled by the driving motor 803, so as to control the opening degree of the connection channel 801, so as to ensure that the air volume entering the air duct assembly meets the requirements.

[0101] In an embodiment of the present application, check valves are respectively arranged in the oil fume channel and / or the air-conditioning exhaust channel, which avoids the occurrence of air backflow caused by too strong external environmental wind.

[0102] In an embodiment of the present application, a switching valve is arranged in the mixing channel, and the switching valve is used to control the opening or closing of the mixing channel.

[0103] When there is no wind blowing out of the mixing channel, the switching valve closes the mixing channel, thereby avoiding the occurrence of wind backflow from the mixing channel.

[0104] The control method of the kitchen air conditioning assembly provided by the embodiment of the third aspect of the present application includes the following steps:

[0105] Step S10, detect in real time whether the ceiling-mounted air conditioner and the range hood are turned on.

[0106] Step S20, when the range hood is not turned on and the ceiling-mounted air conditioner is turned on, control the mixing channel to open within a first preset time, and control the fan of the ceiling-mounted air conditioner to reach the maximum speed within a second preset time.

[0107] Specifically, when the range hood is not turned on and the ceiling-mounted air conditioner is turned on, control the switching valve to open, and the switching valve opens within 3-10 seconds. Preferably, the switching valve opens within 5 seconds. After the ceiling-mounted air conditioner is turned on, the fan speed of the ceiling-mounted air conditioner reaches the highest speed within 5 seconds, and the fan speed is maintained at the highest speed all the time. Therefore, during the process of turning on the ceiling-mounted air conditioner, the flow area of the air valve is increasing, and at the same time the fan speed is also increasing, that is, the air supply volume is increasing, so that the static pressure of the exhaust air is steadily increased and maintained.

[0108] Step S30, when both the range hood and the ceiling-mounted air conditioner are turned on, control the second air inlet channel to close for a third preset time and then control the second air inlet channel to open at a preset speed, and control the fan of the ceiling-mounted air conditioner to reach the maximum speed within a second preset time.

[0109] Specifically, when both the range hood and the ceiling-mounted air conditioner are turned on, the air valve is controlled to close for 1.5 to 8 seconds. Preferably, the air valve is controlled to close for 3.3 seconds, and then the air valve is opened. The opening speed of the air valve is 0.4 - 1 times the normal opening speed of the air valve. During the process of opening the air valve, the fan speed of the ceiling-mounted air conditioner reaches the maximum speed within 5 seconds, and the fan speed is maintained at the maximum speed all the time, so that a relatively high static pressure has been established in the air duct during the process of opening the air valve. After the air valve is opened, air is exhausted to the outside of the air valve. When the fan speed gradually increases and the air valve is slowly opened, the static pressure difference between the inside of the air duct and the air duct behind the air valve is maintained, so as to ensure that there is a continuous air volume passing through the condensation heat exchanger, thus ensuring heat dissipation and avoiding high-pressure protection. After the air valve is started to open, within 0 - 3.5 seconds, the ceiling-mounted air conditioner starts to operate to cool and supply air as early as possible.

[0110] The control method provided by this application avoids the mutual interference between the cooking fume and the cooling air of the air conditioner, thus avoiding the occurrence of the reverse flow or poor flow of the cooking fume or the cooling air of the air conditioner, and enabling the smooth discharge of the cooking fume and the cooling air of the air conditioner.

[0111] In this application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Terms such as "installed", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0112] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0113] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. An air duct assembly, characterized in that, It includes a first air inlet channel, a second air inlet channel and a mixing channel that are interconnected. The first air inlet channel is used to discharge hot air containing moisture; the second air inlet channel is used to discharge oil fume containing oil stains and dust particles, and the mixing channel is used to mix the oil fume and the hot air and then discharge them. A guiding inclined plane is provided on the mixing channel. It includes a housing and an air duct. The housing has the first air inlet channel, the second air inlet channel and the mixing channel. A communication hole is formed at the intersection of the first air inlet channel and the second air inlet channel; the air duct is arranged in the first air inlet channel. The fixed end of the air duct is connected to the inner wall of the first air inlet channel, and the free end of the air duct extends towards the direction close to the mixing channel. Wherein, the overlapping length of the projection of the air duct on the projection plane and the projection of the communication hole on the projection plane is D; in the direction from the fixed end to the free end, the length between the corresponding hole walls of the communication hole is H, and D / H = 1 / 3 - 2 / 3.

2. The air duct assembly according to claim 1, wherein the included angle between the axis of the first air inlet channel and the axis of the second air inlet channel is 30° - 60°.

3. The air duct assembly according to claim 1, wherein an annular cavity is formed between the air duct and the wall surface of the first air inlet channel.

4. The air duct assembly according to claim 1, wherein protrusions are provided on the wall surface of the second air inlet channel. The protrusions are arranged adjacent to the communication hole and are located on the side away from the air duct.

5. A kitchen air conditioning component, characterized in that, It includes: the air duct assembly according to any one of claims 1 to 4, wherein the mixing channel of the air duct assembly is used to communicate with the ambient air; a ceiling-mounted air conditioner, and the ceiling-mounted air conditioner is connected to the first air inlet channel of the air duct assembly through an air-conditioning exhaust channel; and a range hood, and the range hood is connected to the second air inlet channel of the air duct assembly through an oil fume channel.

6. The kitchen air conditioning assembly according to claim 5, characterized in that, It further includes: a first sensor, which is arranged in the oil fume channel and is used to detect the first parameter of the gas in the oil fume channel and send a first signal; a second sensor, which is arranged in the air-conditioning exhaust channel and is used to detect the second parameter of the gas in the air-conditioning exhaust channel and send a second signal; a heating device, which is respectively arranged in the air-conditioning exhaust channel and the oil fume channel; and a controller, which is respectively connected to the first sensor, the second sensor and the heating device. The controller controls the start and stop of the heating device according to the first signal and the second signal.

7. The kitchen air conditioning assembly according to claim 5, wherein, It further includes: a wind valve, which is arranged between the oil fume channel and the air duct assembly and is respectively connected to the oil fume channel and the air duct assembly; wherein, the wind valve includes: a connection channel, which is arranged between the oil fume channel and the air duct assembly and is respectively connected to the oil fume channel and the air duct assembly. Two baffles, the two baffles are arranged in the connection channel and are respectively rotatably connected to the connection channel, and the two baffles are used to open or close the connection channel; and A driving motor, the driving motor is respectively connected to the two baffles and is used to drive the baffles to rotate relative to the connection channel.

8. The kitchen air conditioning assembly according to claim 5, wherein A switching valve is arranged in the mixing channel, and the switching valve is used to control the opening or closing of the mixing channel.

9. A control method for a kitchen air conditioning assembly according to any one of claims 5 to 8, characterized in that, The method includes the following steps: detecting in real time whether the ceiling-mounted air conditioner and the range hood are turned on; When the range hood is not turned on and the ceiling-mounted air conditioner is turned on, controlling the mixing channel to open within a first preset time, and controlling the fan of the ceiling-mounted air conditioner to reach the maximum speed within a second preset time; When both the range hood and the ceiling-mounted air conditioner are turned on, controlling the second air inlet channel to close for a third preset time and then controlling the second air inlet channel to open at a preset speed, and controlling the fan of the ceiling-mounted air conditioner to reach the maximum speed within a second preset time.

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