A range hood and a method of operating the same

Abstract

The application discloses an oil fume extractor and an operation method thereof. The oil fume extractor comprises a smoke collecting shell, a first smoke collecting cavity is arranged in the smoke collecting shell, and an opening is arranged on the front side of the first smoke collecting cavity. An air inlet cover is arranged in the first smoke collecting cavity, a second smoke collecting cavity is arranged in the air inlet cover and communicated with the first smoke collecting cavity, the first smoke collecting cavity and the second smoke collecting cavity form a smoke collecting cavity body, a main air inlet is arranged on the front side of the air inlet cover and communicated with the second smoke collecting cavity, and an auxiliary air inlet is arranged on the lower side of the air inlet cover and communicated with the second smoke collecting cavity. A flap is hinged to the upper end of the air inlet cover. A linear driving structure is arranged on the smoke collecting shell and transmissionally connected with the air inlet cover, the linear driving structure can drive the air inlet cover to move along the front-back direction between the position of extending out of the opening and the position of retracting into the opening. A rotary driving structure is arranged on the air inlet cover and transmissionally connected with the flap, the rotary driving structure can drive the flap to swing between the position of closing the main air inlet and the position of opening the main air inlet.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a range hood and its operating method. Background Technology

[0002] In recent years, the performance of range hoods has been greatly improved, but in actual use, there is still a phenomenon of excessive airflow. To solve the problem of excessive airflow, the fan speed is generally controlled. That is, when the oil fume concentration is high, the fan is controlled to run at a higher speed, and when the oil fume concentration is low, the fan is controlled to run at a lower speed. Alternatively, the size of the air inlet can be adjusted by adjusting the opening of the flap, thereby adjusting the amount of air intake. However, the adjustment speed is slow and it is difficult to match the sudden surge in oil fume concentration during stir-frying.

[0003] Therefore, there is an urgent need for a range hood to solve the above problems. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a range hood that can better adjust the air volume according to the concentration of oil fumes.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A range hood, comprising:

[0007] A smoke collection shell, which has a first smoke collection chamber inside, and an opening is provided on the front side of the first smoke collection chamber;

[0008] An air inlet hood is installed in the first smoke collection chamber. A second smoke collection chamber communicating with the first smoke collection chamber is opened inside the air inlet hood. The first smoke collection chamber and the second smoke collection chamber constitute a smoke collection cavity. A main air inlet communicating with the second smoke collection chamber is opened on the front side of the air inlet hood. An auxiliary air inlet communicating with the second smoke collection chamber is opened on the lower side of the air inlet hood.

[0009] The flap is hinged at its upper end to the upper end of the air inlet cover.

[0010] A linear drive structure is installed on the smoke collection housing and is connected to the air inlet hood in a driving manner. The linear drive structure can drive the air inlet hood to move in the front-back direction between the position of extending out of the opening and the position of retracting into the opening.

[0011] A rotary drive structure is installed on the air inlet cover and is connected to the flap in a transmission manner. The rotary drive structure can drive the flap to swing between the position of closing the main air inlet and opening the main air inlet.

[0012] An oil fume concentration detector is installed on the outside of the range hood to detect the oil fume concentration N. Both the linear drive structure and the rotary drive structure operate according to the oil fume concentration N.

[0013] Optionally, the auxiliary air inlet is inclined downwards from front to back.

[0014] Optionally, it also includes an oil cup, which is detachably installed at the bottom of the opening, and when the flap closes the main air inlet, the flap covers the front of the oil cup.

[0015] Optionally, the linear drive structure includes:

[0016] A linear drive motor is installed on the inner wall of the smoke collection housing;

[0017] Two sets of gear rack structures are provided at the left and right ends of the air inlet cover. The linear drive motor is connected to the gears in the gear rack structure. The racks of the gear rack structure are installed on the air inlet cover in the front-back direction.

[0018] The transmission rod connects the gears of the two sets of gear rack structures.

[0019] Optionally, the rotary drive structure includes:

[0020] A rotary drive motor is installed in the middle of the air inlet cover;

[0021] The linkage structure has one end hinged to the first end of the rotary drive motor and the other end hinged to the middle of the rear side of the flap.

[0022] Optionally, an oil filter is also provided on the auxiliary air inlet.

[0023] Another aspect of the present invention provides a method for operating a range hood as described above, comprising the following steps:

[0024] S1: Turn on the range hood;

[0025] S2: Open the main air inlet, detect the current oil fume concentration N, and enter the initial mode;

[0026] The initial mode includes the following steps:

[0027] S10: Determine if N < N0. If yes, proceed to S20; otherwise, proceed to S50.

[0028] S20: Open the auxiliary air inlet and start timing t01;

[0029] S30: Determine if t01 = t1. If yes, proceed to S40; otherwise, repeat S30.

[0030] S40: Determine whether N < N0. If yes, close the main air inlet and proceed to S70; otherwise, proceed directly to S70.

[0031] S50: Determine whether N > N1. If yes, open the auxiliary air inlet and start timing t02. If no, proceed to S70.

[0032] S60: Determine if t02 = t1. If yes, proceed to S70. If no, repeat S60.

[0033] S70: Determine if the range hood is turned off. If yes, end the program; otherwise, enter the running mode.

[0034] Wherein, N0 is the minimum preset value of oil fume concentration, N1 is the maximum preset value of oil fume concentration, N0 < N1, and t1 is the running time of the linear drive structure driving the air inlet cover to extend or retract into the opening.

[0035] Optionally, the operating mode includes the following steps:

[0036] S100: Determine whether N < N0. If yes, determine whether I1 = 0 and I2 ≠ 0. If yes, open the auxiliary air inlet and start timing t03, then proceed to S200. If no, proceed to S500.

[0037] S200: Determine if t03 = t1. If yes, proceed to S300. If no, repeat S200.

[0038] S300: Determine if N < N0. If yes, proceed to S400; otherwise, return to S70.

[0039] S400: Close the main air inlet and return to S70;

[0040] S500: Determine if I1≠0 and I2≠0. If yes, proceed to S400; otherwise, return to S70.

[0041] Wherein, I1 is the operating current of the linear drive structure, and I2 is the operating current of the rotary drive structure.

[0042] Optionally, in S100, if N≥N0, then proceed to the following steps:

[0043] S101: Determine if N > N1. If yes, then determine if I1 = 0 and I2 ≠ 0. If yes, then open the auxiliary air inlet and start timing t04, then proceed to S102. If no, proceed to S103.

[0044] S102: Determine whether t04 = t1. If so, return to S70; if not, repeat S102.

[0045] S103: Determine whether I1 ≠ 0 and I2 ≠ 0. If so, return to S70; if not, enter S400.

[0046] Optionally, in S101, if N1 ≤ N ≤ N0, determine whether I1 = 0 and I2 ≠ 0. If so, return to S70; if not, proceed to the following steps:

[0047] S201: Determine whether I1 ≠ 0 and I2 ≠ 0. If so, close the auxiliary air inlet and return to S70; if not, open the main air inlet and start timing t05.

[0048] S202: Determine whether t05 = t2. If so, enter S203; if not, repeat S202.

[0049] S203: Determine whether N < N1. If so, close the auxiliary air inlet and return to S70; if not, directly return to S70.

[0050] Where t2 is the running duration for the rotary drive structure to drive the flap to close or open the main air inlet.

[0051] Compared with the prior art, the present invention has at least the following beneficial effects:

[0052] The range hood provided by the present invention has a main air inlet and an auxiliary air inlet provided on the air inlet hood shell, and a linear drive structure is used to control the opening and closing of the auxiliary air inlet, a rotary drive structure is used to control the opening and closing of the main air inlet, and an oil fume concentration detector is used to detect the oil fume concentration N in the cooking chamber. Thus, the linear drive structure and the rotary drive structure can move according to the oil fume concentration N, and further adjust the opening and closing of the auxiliary air inlet and the main air inlet, thereby realizing the adjustment of the air inlet area of the range hood and further realizing the adjustment of the air inlet volume. Specifically, when N < N0, only the auxiliary air inlet is opened; when N0 < N < N1, only the main air inlet is opened; when N1 < N, both the main air inlet and the auxiliary air inlet are opened, so that the air inlet volume matches the oil fume concentration N, and further achieves the effects of energy saving and high efficiency, and solves the problem of excessive air volume existing in the range hoods in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a three-dimensional structural schematic diagram of the range hood provided by a specific embodiment of the present invention (both the main air inlet and the auxiliary air inlet are closed);

[0054] Figure 2 is a three-dimensional structural schematic diagram of the range hood provided by a specific embodiment of the present invention (both the main air inlet and the auxiliary air inlet are opened);

[0055] Figure 3 yes Figure 2 One of the schematic diagrams of the cross-sectional structure;

[0056] Figure 4 yes Figure 2 The second sectional structural diagram;

[0057] Figure 5 This is a three-dimensional structural diagram of a range hood provided in a specific embodiment of the present invention (main air inlet closed, auxiliary air inlet open);

[0058] Figure 6 This is a three-dimensional structural diagram of a range hood provided in a specific embodiment of the present invention (main air inlet open, auxiliary air inlet closed);

[0059] Figure 7 This is a schematic diagram of the operation steps of a range hood provided in a specific embodiment of the present invention.

[0060] In the picture:

[0061] 1. Smoke collection shell; 10. Opening;

[0062] 2. Air inlet cover;

[0063] 3. Flip-board;

[0064] 4. Housing;

[0065] 5. Fume Concentration Detector;

[0066] 6. Oil cup;

[0067] 7. Linear drive structure; 71. Linear drive motor; 72. Gear and rack structure; 73. Transmission rod;

[0068] 8. Rotary drive structure; 81. Rotary drive motor; 82. Linkage structure;

[0069] 9. Fan;

[0070] 101. Main air inlet; 102. Auxiliary air inlet;

[0071] 201. First smoke collection chamber; 202. Second smoke collection chamber; 200. Smoke collection chamber body. Detailed Implementation

[0072] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific embodiments of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solutions claimed in the present invention.

[0073] Please refer to Figures 1-6 , the present invention provides an oil fume extractor, which includes a smoke collecting outer shell 1, an air inlet hood 2, a flap 3, a linear drive structure 7 and a rotary drive structure 8. A first smoke collecting cavity 201 is arranged inside the smoke collecting outer shell 1, and an opening 10 is arranged on the front side of the first smoke collecting cavity 201. The air inlet hood 2 is installed in the first smoke collecting cavity 201. A second smoke collecting cavity 202 communicating with the first smoke collecting cavity 201 is opened inside the air inlet hood 2. The first smoke collecting cavity 201 and the second smoke collecting cavity 202 form a smoke collecting cavity body 200. A main air inlet 101 communicating with the second smoke collecting cavity 202 is opened on the front side of the air inlet hood 2, and an auxiliary air inlet 102 communicating with the second smoke collecting cavity 202 is opened on the lower side of the air inlet hood 2. The upper end of the flap 3 is hinged to the upper end of the air inlet hood 2. The linear drive structure 7 is installed on the smoke collecting outer shell 1 and is in transmission connection with the air inlet hood 2. The linear drive structure 7 can drive the air inlet hood 2 to move between a position extending out of the opening 10 and a position retracting into the opening 10 in the front-back direction. The rotary drive structure 8 is installed on the air inlet hood 2 and is in transmission connection with the flap 3. The rotary drive structure 8 can drive the flap 3 to swing between a position closing the main air inlet 101 and a position opening the main air inlet 101. An oil fume concentration detector 5 is arranged on the outside of the oil fume extractor for detecting the oil fume concentration N, and both the linear drive structure 7 and the rotary drive structure 8 operate according to the oil fume concentration N.

[0074] The oil fume extractor provided by the present invention sets a main air inlet 101 and an auxiliary air inlet 102 on the air inlet hood 2, controls the opening and closing of the auxiliary air inlet 102 by using the linear drive structure 7, controls the opening and closing of the main air inlet 101 by using the rotary drive structure 8, and uses the oil fume concentration detector 5 to detect the oil fume concentration N in the cooking chamber. Furthermore, the linear drive structure 7 and the rotary drive structure 8 can move according to the oil fume concentration N, and then adjust the opening and closing of the auxiliary air inlet 102 and the main air inlet 101, so as to realize the adjustment of the air inlet area of the oil fume extractor, and further realize the adjustment of the air inlet volume. Specifically, when N < N0, as shown in Figure 5 , only the auxiliary air inlet 102 is opened. When N0 < N < N1, as shown in Figure 6 , only the main air inlet 101 is opened. When N1 < N, as shown in Figure 2 , Figure 3 , Figure 4 , the main air inlet 101 and the auxiliary air inlet 102 are opened simultaneously, and the smoke collecting range is further expanded, which is beneficial to preventing oil fume from escaping, so that the air inlet volume matches the oil fume concentration N, and further achieves the effects of energy saving and high efficiency, and solves the problem of excessive air volume existing in the oil fume extractor in the prior art. Among them, N0 is the lowest preset value of the oil fume concentration, N1 is the highest preset value of the oil fume concentration, and N0 < N1.

[0075] Optionally, the auxiliary air inlet 102 is inclined downward from front to back so that oil stains can flow from front to back along the auxiliary air inlet 102 into the inside of the smoke collection shell 1, preventing oil stains from dripping onto the stove.

[0076] Optionally, it also includes an oil cup 6, which is detachably installed at the bottom of the opening 10. When the flap 3 closes the main air inlet 101, the flap 3 covers the front of the oil cup 6. The oil cup 6 is used to collect oil stains on the air inlet cover 2. Since the flap 3 can be moved to the front of the oil cup 6 when the main air inlet 101 is closed, the oil cup 6 is hidden when the range hood is turned off, which plays an aesthetic role.

[0077] Optionally, the linear drive structure 7 includes a linear drive motor 71, two sets of gear and rack structures 72, and a transmission rod 73. The linear drive motor 71 is mounted on the inner wall of the smoke collection housing 1. A set of gear and rack structures 72 is provided at both the left and right ends of the air inlet hood 2. The linear drive motor 71 is connected to the gears in the gear and rack structures 72, and the racks of the gear and rack structures 72 are mounted on the air inlet hood 2 in the front-to-back direction. The gears of the two sets of gear and rack structures 72 are connected by the transmission rod 73, thereby achieving stable driving of the air inlet hood 2.

[0078] Optionally, the rotary drive structure 8 includes a rotary drive motor 81 and a connecting rod structure 82. The rotary drive motor 81 is mounted in the middle of the air inlet shroud 2. One end of the connecting rod structure 82 is hinged to the first end of the rotary drive motor 81, and the other end is hinged to the middle of the rear side of the flap 3, thereby achieving stable driving of the flap 3.

[0079] It should be noted that the linkage structure 82 is existing technology and will not be described in detail here.

[0080] Optionally, an oil filter is also provided on the auxiliary air inlet 102 to filter oil.

[0081] Optionally, the oil fume concentration detector 5 is a PM2.5 module used to detect PM2.5 data in the air. The more PM2.5 in the air, the higher the oil fume concentration.

[0082] Optionally, it also includes a casing and a fan 9 disposed inside the casing, the casing being installed on the upper side of the smoke collection housing 1 and communicating with the smoke collection chamber 200.

[0083] Optionally, the PM2.5 module is mounted on the lower front side of the chassis.

[0084] Please refer to Figure 7 In another aspect, the present invention provides a method for operating a range hood as described above, comprising the following steps:

[0085] S1: Turn on the range hood;

[0086] S2: Open the main air inlet 101, detect the current oil fume concentration N, and enter the initial mode;

[0087] The initial mode includes the following steps:

[0088] S10: Determine if N < N0. If yes, proceed to S20; otherwise, proceed to S50.

[0089] S20: Open the auxiliary air inlet 102 and start timing t01;

[0090] S30: Determine if t01 = t1. If yes, proceed to S40. Otherwise, repeat S30 to prevent the auxiliary air inlet 102 from closing before it is fully open.

[0091] S40: Determine whether N < N0. If yes, close the main air inlet 101 and proceed to S70; otherwise, keep both the main air inlet 101 and the auxiliary air inlet 102 open and proceed directly to S70 to prevent the auxiliary air inlet 102 from opening and closing frequently.

[0092] S50: Determine whether N > N1. If yes, open the auxiliary air inlet 102 and start timing t02. If no, keep the main air inlet 101 open and proceed directly to S70.

[0093] S60: Determine if t02 = t1. If yes, proceed to S70. If no, repeat S60 to prevent the auxiliary air inlet 102 from closing before it is fully open.

[0094] S70: Determine if the range hood is turned off. If yes, end the program; otherwise, enter the running mode.

[0095] Wherein, t1 is the running time of the linear drive structure 7 driving the air inlet cover 2 to extend or retract into the opening 10.

[0096] Optionally, the operating mode includes the following steps:

[0097] S100: Determine if N < N0. If yes, determine if I1 = 0 and I2 ≠ 0. If yes, open the auxiliary air inlet 102 and start timing t03, then proceed to S200. If no, proceed to S500.

[0098] S200: Determine if t03 = t1. If yes, proceed to S300. If no, repeat S200 to ensure that the auxiliary air inlet 102 is fully open before closing the main air inlet 101, so as to ensure that at least one of the main air inlet 101 and the auxiliary air inlet 102 is open, thereby ensuring the air intake effect.

[0099] S300: Determine if N < N0. If yes, proceed to S400; otherwise, return to S70.

[0100] S400: Close the main air inlet 101 and return to S70;

[0101] S500: Determine whether I1≠0 and I2≠0. If yes, proceed to S400; otherwise, keep the auxiliary air inlet 102 open and return directly to S70.

[0102] Wherein, I1 is the operating current of the linear drive structure 7, and I2 is the operating current of the rotary drive structure 8.

[0103] Optionally, in S100, if N≥N0, then proceed to the following steps:

[0104] S101: Determine if N > N1. If yes, then determine if I1 = 0 and I2 ≠ 0. If yes, then open the auxiliary air inlet 102 and start timing t04, then proceed to S102. If no, proceed to S103.

[0105] S102: Determine if t04 = t1. If yes, return to S70. If no, repeat S102 to prevent the auxiliary air inlet 102 from closing before it is fully open.

[0106] S103: Determine whether I1≠0 and I2≠0. If yes, keep the main air inlet 101 and auxiliary air inlet 102 open at the same time and return to S70. If no, proceed to S400.

[0107] Optionally, in S101, if N1≤N≤N0, then determine whether I1=0 and I2≠0. If yes, then keep the main air inlet 101 open and return to S70. If not, proceed to the following steps:

[0108] S201: Determine whether I1≠0 and I2≠0. If yes, close the auxiliary air inlet 102 and return to S70. If no, open the main air inlet 101 and start timing t05.

[0109] S202: Determine if t05 = t2. If yes, proceed to S203. If no, repeat S202 to prevent the main air inlet 101 from closing before it is fully open.

[0110] S203: Determine whether N < N1. If yes, close the auxiliary air inlet 102 and return to S70 to prevent the main air inlet 101 from frequently opening and closing. If no, keep both the main air inlet 101 and the auxiliary air inlet 102 open and return directly to S70.

[0111] Wherein, t2 is the operating time of the rotary drive structure 8 driving the flap 3 to close or open the main air inlet 101.

[0112] Optionally, in S2, detecting the current oil fume concentration N specifically includes the following steps:

[0113] The PM2.5 module detects the PM2.5 value in the air every second and calculates the average value of PM2.5 detected within 5 seconds to obtain the oil fume concentration N.

[0114] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A method of operating a range hood, characterized in that, The utility model relates to a smoke exhaust hood, and more particularly to a smoke exhaust hood with a variable air inlet. The smoke exhaust hood comprises a smoke exhaust shell (1) provided with a first smoke exhaust cavity (201) therein, an air inlet cover (2) installed in the first smoke exhaust cavity (201), a flap (3) hingedly connected to the upper end of the air inlet cover (2), a linear drive structure (7) installed on the smoke exhaust shell (1) and drivingly connected to the air inlet cover (2), a rotary drive structure (8) installed on the air inlet cover (2) and drivingly connected to the flap (3), and an oil fume concentration detector (5) arranged outside the smoke exhaust hood and used for detecting the oil fume concentration N. The linear drive structure (7) and the rotary drive structure (8) are operated according to the oil fume concentration N. The operation method of the smoke exhaust hood comprises the following steps: S1: turning on the smoke exhaust hood; S2: opening the main air inlet, detecting the current oil fume concentration N, and entering an initial mode; The initial mode comprises the following steps: S10: determining whether N < N0, if yes, entering S20, and if no, entering S50; S20: opening the auxiliary air inlet (102) and starting timing t01; S30: determining whether t01 = t1, if yes, entering S40, and if no, repeatedly executing S30; S40: determining whether N < N0, if yes, closing the main air inlet (101) and entering S70, and if no, directly entering S70; S50: determining whether N > N1, if yes, opening the auxiliary air inlet (102) and starting timing t02, and if no, entering S70; S60: determining whether t02 = t1, if yes, entering S70, and if no, repeatedly executing S60; S70: determining whether the smoke exhaust hood is turned off, if yes, ending the program, and if no, entering an operation mode; Wherein, N0 is the lowest preset value of the oil fume concentration, N1 is the highest preset value of the oil fume concentration, N0 < N1, and t1 is the operation time length of the linear drive structure (7) for driving the air inlet cover (2) to extend out of or retract into the opening (10). The auxiliary air inlet (102) is downwardly inclined from front to back. ​ ​ 2. The method of operating a range hood according to claim 1, wherein, ​ 3. The method of operating a range hood according to claim 1, wherein, Further comprising an oil cup (6) which is detachably installed at the bottom end of the opening (10), and when the flap (3) closes the main air inlet (101), the flap (3) covers the front of the oil cup (6).

4. The method of operating a range hood according to claim 1, wherein, The straight line driving structure (7) comprises: A straight line driving motor (71) is installed on the inner wall of the smoke collecting shell (1); Two sets of gear and rack structures (72) are arranged at the left end and the right end of the air inlet cover shell (2), the gear of one of the gear and rack structures (72) is in transmission connection with the straight line driving motor (71), and the rack of the gear and rack structure (72) is installed on the air inlet cover shell (2) in the front-rear direction; A transmission rod (73) is connected between the gears of the two sets of gear and rack structures (72).

5. The method of operating a range hood according to claim 1, wherein, The rotary driving structure (8) comprises: A rotary driving motor (81) is installed at the middle part of the air inlet cover shell (2); A connecting rod structure (82) is hingedly connected at one end to the first end of the rotary driving motor (81) and at the other end to the middle part of the rear side of the flap (3).

6. The method of operating a range hood according to any one of claims 1-5, wherein, An oil screen is further arranged on the auxiliary air inlet (102).

7. The method of operating a range hood according to any one of claims 1-5, wherein, The operation mode comprises the following steps: S100: Determine whether N S200: Determine whether t03=t1, if yes, enter S300, if no, repeat S200; S300: Determine whether N S400: Close the main air inlet and return to S70; S500: Determine whether I1≠0 and I2≠0, if yes, enter S400; if no, return to S70; Wherein, I1 is the running current of the straight line driving structure (7), and I2 is the running current of the rotary driving structure (8).

8. The method of operating a range hood according to claim 7, wherein, In S100, if N≥N0, the following steps are entered: S101: Determine whether N S102: Determine whether t04=t1, if yes, return to S70, if no, repeat S102; S103: Determine whether I1≠0 and I2≠0, if yes, return to S70, if no, enter S400.

9. The method of operating a range hood according to claim 8, wherein, In S101, if N1≤N≤N0, determine whether I1=0 and I2≠0, if yes, return to S70, if no, the following steps are entered: S201: Determine whether I1≠0 and I2≠0, if yes, close the auxiliary air inlet and return to S70, if no, open the main air inlet and start timing t05; S202: Determine whether t05=t2, if yes, enter S203, if no, repeat S202; S203: judging whether N < N1, if yes, closing the auxiliary air inlet and returning to S70, if not, directly returning to S70; Wherein, t2 is the running time length of the rotating driving structure (8) driving the flap (3) to close or open the main air inlet (101).

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