Kitchen air conditioning system

Abstract

The utility model relates to a kitchen air conditioning system, which comprises a range hood, a fan system, an air inlet, an air outlet and an air outlet, the first driving device is used for driving a window of a kitchen to move and adjusting the opening degree of the window, the first wind speed sensor is arranged at the window of the kitchen and used for detecting the flowing condition of airflow entering the kitchen through the window, and the machine shell is further provided with a second wind speed sensor used for detecting the flowing condition of smoke. The range hood further comprises a controller in electric signal connection with the first wind speed sensor, the second wind speed sensor and the first driving device, and the controller can control the first driving device to act according to airflow flowing signals transmitted by the first wind speed sensor and the second wind speed sensor so as to adjust the opening degree of the window. The device has the advantages that the opening and closing of the window or the kitchen door can be controlled in time according to the rising process of oil smoke in a kitchen and the influence process of external airflow.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen air conditioning systems, in particular to a kitchen air conditioning system comprising a range hood. Background Art

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It is installed above the kitchen stove and can quickly extract the waste from stove combustion and the oil smoke generated during cooking that is harmful to the human body and discharge it outdoors, reducing pollution, purifying the air, and having anti-toxic and explosion-proof safety protection functions. The range hood works on the principle of fluid dynamics. The centrifugal fan installed inside the range hood absorbs and exhausts the oil smoke, and uses a filter to filter some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, sucking the oil smoke below the range hood into the fan, and after being accelerated by the fan, it is collected by the volute and guided to be discharged outdoors.

[0003] During the operation of traditional range hoods, the motor speed of the fan is fixed, that is, the fan gear is fixed, and the adaptive ability is poor. During the cooking process, if the kitchen space is closed, after the range hood has been working for a long time, the closed kitchen space will be drawn into a negative pressure, which not only affects the normal exhaust of the range hood, but also is very likely to suck up the odor and foreign matter from the sewer. At this time, users generally need to open the window or kitchen door, but if the kitchen door is opened for a long time or the kitchen door is opened too wide, the cooking fume will spread to other areas such as the living room, causing trouble to the user; on the other hand, opening the window can also solve this problem, but in windy weather, the outside wind will interfere with the exhaust airflow of the range hood, making it more likely that the fume will escape and reduce the exhaust effect. In particular, many users only realize that they forgot to open the window and close the kitchen door after they start cooking, which affects the user's cooking experience. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a kitchen air conditioning system which can timely control the opening and closing of windows according to the rising process of kitchen fumes and the influence of external airflow to ensure the smoke extraction effect of the range hood in view of the current status of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: an air conditioning system, comprising:

[0006] A range hood comprises a casing and a fan system, wherein the casing is provided with an air inlet;

[0007] It also includes a first driving device for moving the kitchen window and adjusting its opening size, and a first wind speed sensor arranged at the kitchen window for detecting the flow of airflow entering the kitchen through the window. The casing is also provided with a second wind speed sensor for detecting the flow of smoke. The range hood also includes a controller electrically connected to the above-mentioned first wind speed sensor, the second wind speed sensor and the first driving device. The controller can control the action of the first driving device according to the airflow signal transmitted by the first wind speed sensor and the second wind speed sensor, thereby adjusting the opening of the window.

[0008] Considering that the smoke disturbance caused by external airflow to the effective smoke inlet area is related to the wind speed and wind direction, preferably, the first wind speed sensor and the second wind speed sensor both adopt ultrasonic wind speed and direction sensors that can detect the wind direction and wind speed of the airflow.

[0009] Taking into account that the smell of oil smoke in the kitchen with an open door will spread to other areas, and when the window opening degree reaches the minimum threshold, the problem of oil smoke disturbance caused by the airflow entering the window is still not improved, for this reason, it can be jointly controlled with the opening and closing of the kitchen door, and also includes a second drive device that drives the kitchen door to move and adjusts its opening size. The second drive device is also electrically connected to the controller of the range hood, so as to control the second drive device to open or close the kitchen door according to the airflow flow signal transmitted by the first wind speed sensor and the second wind speed sensor.

[0010] In order to jointly control the air volume level of the range hood and reduce the problem of oil smoke escape, the controller controls the air volume level of the range hood according to the air flow signals transmitted by the first wind speed sensor and the second wind speed sensor.

[0011] As an improvement, the window body is opened and closed by rotation or linear movement relative to the window frame.

[0012] Preferably, the window body is rotatably connected to the window frame via a first pin shaft, and the first driving device includes a first electric push rod and a first hinge rotatably connected to the above-mentioned first pin shaft, one end of the first hinge is connected to the window, and the other end is connected to the end of the telescopic rod of the first electric push rod.

[0013] Preferably, the range hood is a near-suction range hood or a top-suction range hood.

[0014] Preferably, the range hood is a top-suction range hood, and the air inlet is provided at the bottom of the housing.

[0015] Preferably, the housing comprises a fan frame and a smoke collecting hood, the inner cavity of the fan frame is communicated with the inner cavity of the smoke collecting hood, and the air inlet is provided on the smoke collecting hood.

[0016] Preferably, the fan system is arranged in the fan frame. It is conceivable that the fan system can also be arranged outside the casing, such as a ceiling-mounted range hood in which the fan is installed on the ceiling.

[0017] Compared with the prior art, the advantages of the utility model are as follows: a first wind speed sensor and a second wind speed sensor are respectively arranged at the air inlet and the window of the range hood; the above two wind speed sensors and a first driving device for driving the kitchen window to move and adjust its opening size are electrically connected to the controller of the range hood; the controller can control the action of the first driving device and thus adjust the opening of the window according to the airflow flow signal transmitted by the first wind speed sensor and the second wind speed sensor; that is, the rising of oil smoke and the influence of external airflow are comprehensively considered, and the opening and closing of the window is timely controlled in combination with the working condition of the range hood itself; for example, the window can be opened and closed before the external airflow reaches the working area of ​​the range hood, thereby ensuring the advance control, effectively improving the disturbance problem of external airflow, and improving the oil fume extraction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a range hood and a cooking appliance of a kitchen air conditioning system according to an embodiment of the utility model;

[0019] Figure 2 A front view of a range hood and a cooker of a kitchen air conditioning system according to an embodiment of the utility model;

[0020] Figure 3 A bottom view of a range hood of a kitchen air conditioning system according to an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the oil smoke velocity in the effective air inlet area when viewed from above in an embodiment of the utility model;

[0022] Figure 5 A top view of a kitchen air conditioning system according to an embodiment of the utility model with a window in an open state;

[0023] Figure 6 This is a three-dimensional structural schematic diagram of a kitchen air conditioning system according to an embodiment of the utility model, with a kitchen door in an open state. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0026] Figure 1-Figure 6 A preferred embodiment of the kitchen air conditioning system of the utility model is shown. The kitchen air conditioning system includes a range hood, a stove 14, a first drive device for controlling the opening and closing of a kitchen environment window 21, and a second drive device for controlling the opening and closing of a kitchen door 30. The range hood includes a housing 10 and a centrifugal fan arranged in the housing 10. The housing 10 generally includes a fan frame 11 and a fume hood 12 arranged at the bottom of the fan frame 11. The inner cavity of the fan frame 11 is connected to the inner cavity of the fume hood 12. The range hood of this embodiment takes a top suction range hood as an example. An air inlet (not shown) is provided at the bottom of the fume hood 12, and external smoke can enter the fume hood 12 through the air inlet. In order to reduce the escape of oil smoke, a horizontally arranged rectifier plate 121 is provided at the bottom of the fume hood 12 below the air inlet. The centrifugal fan is arranged in the fan frame 11. When the centrifugal fan is in operation, negative pressure is generated, and external oil smoke can be sucked into the fume hood 12 through the air inlet. The stove 14 is provided with a burner 141 , and two burners 141 are arranged at intervals on the left and right.

[0027] The first driving device is used to drive the kitchen window 21 to move and adjust its opening size. Specifically, the main body of the window 21 is rotatably connected to the window frame 21 through the first pin shaft 25. The first driving device includes a first electric push rod 23 and a first hinge 24 rotatably connected to the first pin shaft 25. One end of the first hinge 24 is connected to the window 21, and the other end is connected to the end of the telescopic rod of the first electric push rod 23. The main body of the first electric push rod 23 is fixed to the wall 40 through the first hinge seat 26. More specifically, the first pin shaft 25 is arranged to extend vertically, and the first electric push rod 23 is arranged to extend horizontally. When the telescopic rod of the first electric push rod 23 is extended or retracted, the main body of the window 21 can be opened to different angles.

[0028] The second driving device is used to drive the kitchen door 30 to move and adjust its opening size. Specifically, the door 30 is rotatably connected to the door 30 frame through the second pin shaft 33. The second driving device includes a second electric push rod 31 and a second hinge 32 rotatably connected to the second pin shaft 33. One end of the second hinge 32 is connected to the door 30, and the other end is connected to the end of the telescopic rod of the second electric push rod 31. The main body of the second electric push rod 31 is fixed to the wall 40 through the second hinge seat 34. More specifically, the second pin shaft 33 is arranged to extend vertically, and the second electric push rod 31 is arranged to extend horizontally. When the telescopic rod of the second electric push rod 31 is extended or retracted, the main body of the door 30 can be opened to different angles.

[0029] A first wind speed sensor for detecting the flow of air entering the kitchen through the window 21 is also provided at the kitchen window 21, and a second wind speed sensor for detecting the flow of smoke at the air inlet is also provided on the casing 10. Considering that the smoke disturbance caused by the external airflow to the effective smoke inlet area is related to the wind speed and wind direction, the first wind speed sensor and the second wind speed sensor both use ultrasonic wind speed and direction sensors that can detect the wind direction and wind speed of the airflow.

[0030] The controller of the range hood is connected to the first wind speed sensor, the second wind speed sensor, the first electric push rod 23 of the first drive device, and the second electric push rod 31 of the second drive device by electrical signals, such as by WiFi connection. The controller of the range hood can control the action of the first drive device according to the airflow flow signal transmitted by the first wind speed sensor and the second wind speed sensor, and then adjust the opening of the window 21. Considering that the oil smoke smell in the kitchen with the open door 30 will spread to other areas, and when the opening degree of the window 21 reaches the minimum threshold, the oil smoke disturbance problem caused by the airflow entering the window 21 cannot be improved, the opening adjustment of the window 21 can be combined with the air volume of the range hood and the opening and closing of the kitchen door 30. That is, the controller of the range hood can control the action of the second electric push rod 31 of the second drive device to open or close the kitchen door 30 and control the air volume level of the range hood according to the airflow flow signal transmitted by the first wind speed sensor and the second wind speed sensor.

[0031] The joint control and adjustment of the opening of the window 21, the opening of the door 30 and the air volume level of the range hood are specifically as follows:

[0032] The length and width of the effective air inlet area of ​​the smoke collecting chamber of the range hood 12 are a and b respectively, the distance between the upper edge of the pot and the air inlet of the range hood is c, the minimum normal distance between the outer edge of the pot and the left and right sides of the air inlet of the range hood is d, and the minimum normal distance from the front and rear sides is e.

[0033] Under the premise that there is no external air flow disturbance, the rising speed of oil smoke at a certain working gear is v0. The speed direction of oil smoke is decomposed into three directions of XYZ in the three-axis coordinate system, which are v x , v y and v z , where v is set x is the speed of oil smoke flowing to the left and right sides of the range hood, v z is the speed of oil smoke flowing to the front and rear sides of the range hood, then v y It is the speed at which oil smoke flows vertically into the smoke collecting chamber of the range hood.

[0034] According to the above parameters we can get:

[0035] In the Y direction (vertical direction of the range hood), the time for the oil smoke to be extracted by the range hood is t y =c / v y ;

[0036] In the X direction (the left and right sides of the range hood), the shortest time for the oil smoke to leave the effective air inlet area is t x =d / v x ;

[0037] In the Z direction (the front and rear sides of the range hood), the shortest time for the oil smoke to leave the effective air inlet area is t z =e / v z .

[0038] Generally speaking, when there is no external airflow disturbance or the oil fume concentration matches the range hood gear, t y <t x , t y <t z That is, the time for the oil smoke to be sucked away by the range hood in the vertical direction is shorter than the time for the oil smoke to escape from the effective air inlet area from the left and right sides and the front and back sides, that is, the oil smoke will not escape from the left and right sides and the front and back sides of the range hood.

[0039] When the user opens the window, the external airflow (such as natural wind) may affect the normal operation of the range hood. The first wind speed sensor on the window detects that the speed of the external airflow is v1. At this time, it can be considered that after the external airflow reaches the effective air inlet area, the speed of the oil smoke will become the combined speed v′ of v0 and v1. v′ is decomposed in the XYZ direction into v′ x , v′ y and v′ z .

[0040] Generally speaking, the external airflow has a greater impact on the oil smoke in the X and Z directions. The speed in the Y direction can be considered to remain unchanged due to the existence of the range hood, that is, v′ y =v′y , the time for the smoke to be removed is still t y .

[0041] In the X direction, the shortest time for the smoke to leave the effective air inlet area is t′ x =d / v′ x ;

[0042] In the Z direction, the shortest time for the smoke to leave the effective air inlet area is t′ z =e / v′ z .

[0043] If t y >t′ x , that is, the oil smoke will escape to the left and right sides of the range hood; if t y >t′ z , that is, the oil smoke will escape to the front and rear sides of the range hood; if t y >t′ x And t y >t′ z , that is, the oil smoke will escape to the left and right sides and the front and back sides of the range hood.

[0044] Based on the above analysis, the working method of the kitchen air conditioning system in this embodiment to prevent airflow disturbance from affecting the oil smoke is as follows:

[0045] 1. The user turns on the range hood, and the controller of the range hood sends signals to the first drive device and the second drive device on the window and the door respectively. The first electric push rod 23 of the first drive device drives the window 21 to open the width k or angle θ, k∈[k1, k2], θ∈[θ1, θ2], and the second electric push rod 31 of the second drive device closes the door 30.

[0046] 2. The user turns on the stove and starts cooking. The second wind speed sensor at the air inlet of the range hood starts to detect the speed v0 of the rising oil smoke, and the first wind speed sensor on the window 21 starts to detect the wind speed v1 of the outside wind and sends the collected data to the controller of the range hood.

[0047] 3. The range hood system combines and decomposes the speeds v0 and v1, and calculates and compares the time according to the above formula. If t y >t′ x or y >t′ z , that is, it is determined that the oil smoke has a tendency to escape to the left or right side or the front or back side. At this time, the controller sends a signal to the first drive device on the window 21, and the first electric push rod 23 closes the window by Δk or Δθ.

[0048] 4. After the window is closed for Δk or Δθ, the corresponding wind speed sensors on the window and the range hood detect the wind speed again, obtain new data, and analyze it according to the above method. If t y <t′ x And t y <t′ z If t y >t′ x or y >t′ z , the window 21 continues to close by Δk or Δθ, and the above detection process is repeated.

[0049] 5. When the opening degree of the window 21 reaches the minimum threshold k1 or θ1, t y <t′ x And t y <t′ z Still not established, at this time, determine whether the air volume gear of the range hood is the maximum gear. If not, the range hood is increased by one gear, and the oil smoke speed and the external wind speed are combined and decomposed. The calculation time is calculated and compared. If t y <t′ x And t y <t′ z If t y >t′ x or y >t′ z , then repeat the work of upshifting and testing.

[0050] 6. After the range hood reaches the highest gear and the opening degree of the window 21 reaches the minimum threshold value k1 or θ1, t y <t′ x And t y <t′ z Still not established, at this time, the controller of the range hood sends the signal to the first drive device of the window 21 and the second drive device of the door 30, the first electric push rod 23 on the first drive device closes the window, that is, k = 0 or θ = 0, and the second electric push rod 31 on the second drive device opens the door, and its opening width g < g y Or angle α<α y , where g y and a y These are preset thresholds to prevent excessive fumes from escaping to other areas.

Claims

1. A kitchen air conditioning system, comprising: A range hood comprises a casing (10) and a fan system, wherein the casing (10) is provided with an air inlet; The range hood is characterized in that it also includes a first driving device for driving the kitchen window (21) to move and adjust the opening size thereof, and a first wind speed sensor provided at the kitchen window (21) for detecting the flow of air entering the kitchen through the window (21); the housing (10) is also provided with a second wind speed sensor for detecting the flow of smoke; the range hood also includes a controller electrically connected to the first wind speed sensor, the second wind speed sensor and the first driving device; the controller can control the operation of the first driving device according to the air flow signal transmitted by the first wind speed sensor and the second wind speed sensor, thereby adjusting the opening size of the window (21).

2. The kitchen air conditioning system according to claim 1, characterized in that: The first wind speed sensor and the second wind speed sensor are both ultrasonic wind speed and direction sensors capable of detecting the wind direction and wind speed of airflow.

3. The kitchen air conditioning system according to claim 1, characterized in that: The invention also comprises a second driving device for driving the kitchen door (30) to move and adjust the opening size thereof, and the second driving device is also electrically connected to the controller of the range hood, so as to control the second driving device to open or close the kitchen door (30) according to the airflow flow signal transmitted by the first wind speed sensor and the second wind speed sensor.

4. The kitchen air conditioning system according to claim 1, characterized in that: The controller controls the air volume level of the range hood according to the air flow signals transmitted by the first wind speed sensor and the second wind speed sensor.

5. The kitchen air conditioning system according to any one of claims 1 to 4, characterized in that: The window (21) body is opened and closed relative to the window (21) frame by means of rotation or linear movement.

6. The kitchen air conditioning system according to claim 5, characterized in that: The window (21) body is rotatably connected to the window (21) frame via a first pin shaft (25); the first driving device comprises a first electric push rod (23) and a first hinge (24) rotatably connected to the first pin shaft (25); one end of the first hinge (24) is connected to the window (21), and the other end is connected to the end of the telescopic rod of the first electric push rod (23).

7. The kitchen air conditioning system according to any one of claims 1 to 4, characterized in that: The range hood is a close-suction range hood or a top-suction range hood.

8. The kitchen air conditioning system according to claim 7, characterized in that: The range hood is a top-suction range hood, and the air inlet is arranged at the bottom of the housing (10).

9. The kitchen air conditioning system according to claim 8, characterized in that: The housing (10) comprises a fan frame (11) and a smoke collecting hood (12); the inner cavity of the fan frame (11) is communicated with the inner cavity of the smoke collecting hood (12); and the air inlet is provided on the smoke collecting hood (12).

10. The kitchen air conditioning system according to claim 9, characterized in that: The fan system is arranged in the fan frame (11).

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