Range hood

Abstract

The utility model discloses a range hood which comprises a smoke collecting shell, a first smoke collecting cavity is formed in the smoke collecting shell, and an opening is formed in the front side of the first smoke collecting cavity; the air inlet housing is mounted in the first smoke collecting cavity, a second smoke collecting cavity communicated with the first smoke collecting cavity is formed in the air inlet housing, the first smoke collecting cavity and the second smoke collecting cavity form a smoke collecting cavity body, a main air inlet communicated with the second smoke collecting cavity is formed in the front side of the air inlet housing, and an auxiliary air inlet communicated with the second smoke collecting cavity is formed in the lower side of the air inlet housing; the upper end of the turning plate is hinged to the upper end of the air inlet housing; the linear driving structure is mounted on the smoke collecting shell and is in transmission connection with the air inlet housing, and the linear driving structure can drive the air inlet housing to move between the stretching-out opening and the retracting-in opening in the front-back direction; and the rotary driving structure is installed on the air inlet housing and is in transmission connection with the turning plate, and the rotary driving structure can drive the turning plate to swing between the position where the main air inlet is closed and the position where the main air inlet is opened.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen electrical technology field especially, relates to a range hood. BACKGROUND

[0002] In recent years, the performance of the range hood has been greatly improved, but there is a phenomenon of excessive air volume in the actual use process. In order to solve the problem of excessive air volume, the speed of the fan is generally controlled to solve it, that is, when the oil fume concentration is high, the fan is controlled to run at a high speed, when the oil fume concentration is low, the fan is controlled to run at a low speed, or the size of the air inlet is adjusted by cooperating with the opening of the flap, thereby realizing the adjustment of the air inlet size, the speed of adjustment is slow, and it is difficult to match the sudden surge of the oil fume concentration during the sudden frying.

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

[0004] The utility model aims at at least in a certain extent solves one of the problems existing in prior art related, and for this purpose, the utility model provides a range hood, which can realize better adjustment of air volume according to oil fume concentration.

[0005] The above-mentioned purpose is realized by the following technical scheme:

[0006] A range hood, comprising:

[0007] A smoke collecting shell is provided with a first smoke collecting cavity inside, and the front side of the first smoke collecting cavity is provided with an opening;

[0008] An air inlet cover is installed in the first smoke collecting cavity, a second smoke collecting cavity is formed in the air inlet cover and communicated with the first smoke collecting cavity, the first smoke collecting cavity and the second smoke collecting cavity constitute a smoke collecting cavity body, a main air inlet is formed in the front side of the air inlet cover and communicated with the second smoke collecting cavity, and an auxiliary air inlet is formed in the lower side of the air inlet cover and communicated with the second smoke collecting cavity;

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

[0010] A linear drive structure is installed on the smoke collecting shell and drivingly connected with the air inlet cover, and the linear drive structure can drive the air inlet cover to move along the front and back directions between the positions of extending out of the opening and retracting into the opening;

[0011] A rotary drive structure is installed on the air inlet cover and drivingly connected with the flap, and the rotary drive structure can drive the flap to swing between the positions of closing the main air inlet and opening the main air inlet;

[0012] The oil fume concentration detector is arranged outside the range hood and is used for detecting an oil fume concentration N.

[0013] Optionally, the auxiliary air inlet is arranged downwardly from front to back.

[0014] Optionally, the oil cup is detachably mounted at the bottom end of the opening.

[0015] Optionally, the linear driving structure comprises:

[0016] The linear driving motor is mounted on the inner wall of the smoke collecting shell.

[0017] The left end and the right end of the air inlet cover shell are provided with a group of gear and rack structures.

[0018] The gears of the two groups of gear and rack structures are connected through the transmission rod.

[0019] Optionally, the rotary driving structure comprises:

[0020] The rotary driving motor is mounted on the middle part of the air inlet cover shell.

[0021] The connecting rod structure is hingedly connected to the first end of the rotary driving motor at one end and is hingedly connected to the middle part of the rear side of the flap at the other end.

[0022] Optionally, the auxiliary air inlet is further provided with an oil screen.

[0023] Optionally, the machine box and the fan mounted in the machine box are further included.

[0024] Optionally, the oil fume concentration detector is arranged on the lower side of the front part of the machine box.

[0025] Optionally, the oil fume concentration detector is a PM2.5 module.

[0026] Compared with the prior art, the utility model at least has the beneficial effects that:

[0027] The oil fume exhaust fan provided by the utility model has the advantages that the main air inlet and the auxiliary air inlet are arranged on the air inlet cover shell, the opening and closing of the auxiliary air inlet is controlled by the linear driving structure, the opening and closing of the main air inlet is controlled by the rotary driving structure, the oil fume concentration detector is used to detect the oil fume concentration N of the cooking chamber, the linear driving structure and the rotary driving structure can move according to the oil fume concentration N, and the opening and closing of the auxiliary air inlet and the main air inlet can be adjusted, so that the air inlet area of the oil fume exhaust fan is adjusted, the air inlet volume is adjusted, the air inlet volume is matched with the oil fume concentration N, the energy-saving and high-efficiency effect is achieved, and the problem of excessive air volume of the oil fume exhaust fan in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a perspective structural schematic view of the oil fume exhaust fan provided by the utility model embodiment (the main air inlet and the auxiliary air inlet are both closed);

[0029] Figure 2 is a perspective structural schematic view of the oil fume exhaust fan provided by the utility model embodiment (the main air inlet and the auxiliary air inlet are both opened);

[0030] Figure 3 is Figure 2 a sectional view structural schematic view one;

[0031] Figure 4 is Figure 2 a sectional view structural schematic view two;

[0032] Figure 5 is a perspective structural schematic view of the oil fume exhaust fan provided by the utility model embodiment (the main air inlet is closed, and the auxiliary air inlet is opened);

[0033] Figure 6 is a perspective structural schematic view of the oil fume exhaust fan provided by the utility model embodiment (the main air inlet is opened, and the auxiliary air inlet is closed);

[0034] Figure 7 is a running step schematic view of the oil fume exhaust fan provided by the utility model embodiment.

[0035] In the drawing:

[0036] 1, the smoke collecting shell; 10, the opening;

[0037] 2, the air inlet cover shell;

[0038] 3, the flap;

[0039] 4, the machine shell;

[0040] 5. Oil fume concentration detector;

[0041] 6. Oil cup;

[0042] 7. Linear drive structure; 71, linear drive motor; 72, gear rack structure; 73, transmission rod;

[0043] 8. Rotary drive structure; 81, rotary drive motor; 82, connecting rod structure;

[0044] 9. Fan;

[0045] 101, main air inlet; 102, auxiliary air inlet;

[0046] 201, first smoke collecting cavity; 202, second smoke collecting cavity; 200, smoke collecting cavity. DETAILED DESCRIPTION

[0047] The following examples are used to illustrate the present application, but the present application is not limited by these examples. Modifications to the specific embodiments of the present application or equivalent replacements to some technical features are made without departing from the spirit of the present application, and they should be covered in the technical solution range claimed by the present application.

[0048] Please refer to Figures 1-6 The present application provides an oil fume extractor, which comprises a smoke collecting shell 1, an air inlet cover 2, a flap 3, a linear drive structure 7 and a rotary drive structure 8. The smoke collecting shell 1 is provided with a first smoke collecting cavity 201, and the front side of the first smoke collecting cavity 201 is provided with an opening 10. The air inlet cover 2 is installed in the first smoke collecting cavity 201, and the air inlet cover 2 is provided with a second smoke collecting cavity 202 which is in communication with the first smoke collecting cavity 201. The first smoke collecting cavity 201 and the second smoke collecting cavity 202 form a smoke collecting cavity 200, and the front side of the air inlet cover 2 is provided with a main air inlet 101 which is in communication with the second smoke collecting cavity 202. The lower side of the air inlet cover 2 is provided with an auxiliary air inlet 102 which is in communication with the second smoke collecting cavity 202. The upper end of the flap 3 is hinged to the upper end of the air inlet cover 2. The linear drive structure 7 is installed on the smoke collecting shell 1 and is in transmission connection with the air inlet cover 2. The linear drive structure 7 can drive the air inlet cover 2 to move along the front and back directions between the positions of extending out of the opening 10 and retracting into the opening 10. The rotary drive structure 8 is installed on the air inlet cover 2 and is in transmission connection with the flap 3. The rotary drive structure 8 can drive the flap 3 to swing between the positions of closing the main air inlet 101 and opening the main air inlet 101. An oil fume concentration detector 5 is arranged on the outside of the oil fume extractor and is used to detect the oil fume concentration N. The linear drive structure 7 and the rotary drive structure 8 are both operated according to the oil fume concentration N.

[0049] The range hood provided by the utility model sets a main air inlet 101 and an auxiliary air inlet 102 on the air inlet hood 2, and adopts a linear drive structure 7 to control the opening and closing of the auxiliary air inlet 102, and adopts a rotary drive structure 8 to control the opening and closing of the main air inlet 101. A cooking fume concentration detector 5 is used to detect the cooking fume concentration N in the cooking chamber, so that the linear drive structure 7 and the rotary drive structure 8 can move according to the cooking fume concentration N, and then adjust the opening and closing of the auxiliary air inlet 102 and the main air inlet 101, 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, 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 fume collection range is further expanded, which is beneficial to preventing fume escape, so that the air inlet volume matches the cooking 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 hood in the prior art. Among them, N0 is the lowest preset value of the cooking fume concentration, N1 is the highest preset value of the cooking fume concentration, and N0 < N1.

[0050] Optionally, the auxiliary air inlet 102 is inclined downward from front to back, so that the oil stains can flow from front to back along the auxiliary air inlet 102 into the smoke collection outer shell 1, avoiding the oil stains from dripping onto the stove top.

[0051] Optionally, it further includes an oil cup 6. The oil cup 6 is detachably installed at the bottom end 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 receive the oil stains on the air inlet hood 2. Since the flap 3 can cover the front of the oil cup 6 when closing the main air inlet 101, the hidden effect of the oil cup 6 is realized when the range hood is turned off, playing a role in beautification.

[0052] Optionally, the linear drive structure 7 includes a linear drive motor 71, two groups of gear-rack structures 72 and a transmission rod 73. The linear drive motor 71 is installed on the inner wall of the smoke collection outer shell 1. A group of gear-rack structures 72 are arranged at both the left end and the right end of the air inlet hood 2. The linear drive motor 71 is传动连接 with the gear in the gear-rack structure 72, and the rack of the gear-rack structure 72 is installed on the air inlet hood 2 along the front-back direction. The gears of the two groups of gear-rack structures 72 are connected by a transmission rod 73, so as to realize the stable drive of the air inlet hood 2.

[0053] Optionally, the rotating driving structure 8 comprises a rotating driving motor 81 and a connecting rod structure 82. The rotating driving motor 81 is installed in the middle part of the air inlet casing 2. One end of the connecting rod structure 82 is hinged to the first end of the rotating driving motor 81, and the other end is hinged to the middle part of the rear side of the flap 3, so as to realize stable driving of the flap 3.

[0054] It should be noted that the connecting rod structure 82 is a prior art, which will not be described here.

[0055] Optionally, an oil screen is further arranged on the auxiliary air inlet 102, so as to realize filtering of oil stains.

[0056] Optionally, the oil fume concentration detector 5 is a PM2.5 module, which is used for detecting PM2.5 data in the air. The more PM2.5 in the air, the higher the oil fume concentration.

[0057] Optionally, a machine box and a fan 9 arranged in the machine box are further included. The machine box is installed on the upper side of the smoke collecting shell 1 and communicates with the smoke collecting cavity 200.

[0058] Optionally, the PM2.5 module is installed on the lower side of the front part of the machine box.

[0059] Please refer to Figure 7 , the application further provides a running method of the above-mentioned range hood, comprising the following steps:

[0060] S1: turning on the range hood;

[0061] S2: opening the main air inlet 101, detecting the current oil fume concentration N, and entering an initial mode;

[0062] The initial mode comprises the following steps:

[0063] S10: judging whether N < N0, if yes, entering S20, and if no, entering S50;

[0064] S20: opening the auxiliary air inlet 102 and starting timing t01;

[0065] S30: judging whether t01 = t1, if yes, entering S40, and if no, repeatedly executing S30, so as to prevent the auxiliary air inlet 102 from being closed before being completely opened;

[0066] S40: judging whether N < N0, if yes, closing the main air inlet 101 and entering S70; if no, keeping the state that the main air inlet 101 and the auxiliary air inlet 102 are both opened, and directly entering S70, so as to prevent the auxiliary air inlet 102 from being frequently opened and closed;

[0067] S50: judging whether N>N1, if yes, opening the auxiliary air inlet 102 and starting timing t02, if no, keeping the opening state of the main air inlet 101 and directly entering S70;

[0068] S60: judging whether t02=t1, if yes, entering S70, if no, repeatedly executing S60, thereby preventing the auxiliary air inlet 102 from being closed before being completely opened;

[0069] S70: judging whether the range hood is turned off, if yes, ending the program, if no, entering the running mode;

[0070] Wherein, t1 is the running time length of the linear driving structure 7 driving the air inlet cover 2 to extend or retract into the opening 10.

[0071] Optionally, the running mode comprises the following steps:

[0072] S100: judging whether N

[0073] S200: judging whether t03=t1, if yes, entering S300, if no, repeatedly executing S200, to ensure that the main air inlet 101 is closed after the auxiliary air inlet 102 is completely opened, to ensure that at least one of the main air inlet 101 and the auxiliary air inlet 102 is in the opening state, thereby ensuring the air inlet effect;

[0074] S300: judging whether N

[0075] S400: closing the main air inlet 101 and returning to S70;

[0076] S500: judging whether I1≠0 and I2≠0, if yes, entering S400, if no, keeping the opening state of the auxiliary air inlet 102 and directly returning to S70;

[0077] Wherein, I1 is the running current of the linear driving structure 7, and I2 is the running current of the rotary driving structure 8.

[0078] Optionally, in S100, if N≥N0, the following steps are entered:

[0079] S101: judging whether N>N1, if yes, judging whether I1=0 and I2≠0, if yes, opening the auxiliary air inlet 102 and starting timing t04, then entering S102, if no, entering S103;

[0080] S102: determining whether t04=t1, if yes, returning to S70, if no, repeating S102, thereby preventing the auxiliary air inlet 102 from being closed before being fully opened;

[0081] S103: determining whether I1≠0 and I2≠0, if yes, keeping the main air inlet 101 and the auxiliary air inlet 102 in the state of being opened simultaneously and returning to S70, if no, entering S400.

[0082] Optionally, in S101, if N1≤N≤N0, determining whether I1=0 and I2≠0, if yes, keeping the main air inlet 101 in the state of being opened and returning to S70, if no, entering the following steps:

[0083] S201: determining whether I1≠0 and I2≠0, if yes, closing the auxiliary air inlet 102 and returning to S70, if no, opening the main air inlet 101 and starting timing t05;

[0084] S202: determining whether t05=t2, if yes, entering S203, if no, repeating S202, thereby preventing the main air inlet 101 from being closed before being fully opened;

[0085] S203: determining whether N

[0086] Wherein, t2 is the running time length of the rotary driving structure 8 for driving the flap 3 to close or open the main air inlet 101.

[0087] Optionally, in S2, detecting the current oil fume concentration N specifically includes the following steps:

[0088] The PM2.5 module detects the value of PM2.5 in the air every 1 second, calculates the average value of the detected PM2.5 in 5 seconds, thereby obtaining the oil fume concentration N.

[0089] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A range hood characterized by, The utility model relates to a smoke exhaust hood, which comprises: a smoke exhaust shell (1) provided with a first smoke exhaust cavity (201) inside, the front side of the first smoke exhaust cavity (201) being provided with an opening (10); an air inlet cover (2) installed in the first smoke exhaust cavity (201), the air inlet cover (2) being provided with a second smoke exhaust cavity (202) communicating with the first smoke exhaust cavity (201) inside, the first smoke exhaust cavity (201) and the second smoke exhaust cavity (202) forming a smoke exhaust cavity (200), the air inlet cover (2) being provided with a main air inlet (101) communicating with the second smoke exhaust cavity (202) at the front side, and the air inlet cover (2) being provided with an auxiliary air inlet (102) communicating with the second smoke exhaust cavity (202) at the lower side; a flap (3) having an upper end hinged to the upper end of the air inlet cover (2); a linear drive structure (7) installed on the smoke exhaust shell (1) and in transmission connection with the air inlet cover (2), the linear drive structure (7) being capable of driving the air inlet cover (2) to move along the front-rear direction between a position extending out of the opening (10) and a position retracted into the opening (10); a rotary drive structure (8) installed on the air inlet cover (2) and in transmission connection with the flap (3), the rotary drive structure (8) being capable of driving 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) provided outside the smoke exhaust hood for detecting an oil fume concentration N, the linear drive structure (7) and the rotary drive structure (8) both operating according to the oil fume concentration N.

2. The hood according to claim 1, characterized in that, The auxiliary air inlet (102) is inclined downward from front to back.

3. The hood according to claim 1, characterized in that, The utility model further comprises an oil cup (6) detachably installed at the bottom end of the opening (10), the flap (3) covering the front of the oil cup (6) when the flap (3) closes the main air inlet (101).

4. The hood according to claim 1, characterized in that, The linear drive structure (7) comprises: a linear drive motor (71) installed on the inner wall of the smoke exhaust shell (1); two sets of gear and rack structures (72), each end of the air inlet cover (2) being provided with one set of the gear and rack structure (72), the linear drive motor (71) being in transmission connection with the gears in the gear and rack structures (72), the racks of the gear and rack structures (72) being installed on the air inlet cover (2) along the front-rear direction; a transmission rod (73) connecting the gears of the two sets of gear and rack structures (72).

5. The hood according to claim 1, characterized in that, The rotary drive structure (8) comprises: a rotary drive motor (81) installed at the middle of the air inlet cover (2); a connecting rod structure (82) having one end hinged to the first end of the rotary drive motor (81) and the other end hinged to the middle of the rear side of the flap (3).

6. The hood according to any one of claims 1-5, characterized in that, The auxiliary air inlet (102) and / or the main air inlet (101) are further provided with an oil screen.

7. The hood according to any one of claims 1-5, characterized in that, Also included are a cabinet (4) and a fan (9) installed in the cabinet (4), the cabinet (4) being installed at the upper side of the smoke collecting shell (1) and communicating with the smoke collecting cavity (200).

8. The hood according to claim 7, characterized in that The oil fume concentration detector (5) is arranged at the lower side of the front of the cabinet (4).

9. The hood according to claim 8, characterized in that, The oil fume concentration detector (5) is a PM2.5 module.

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