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CN-121977233-A - Variable air intake lampblack absorber

CN121977233ACN 121977233 ACN121977233 ACN 121977233ACN-121977233-A

Abstract

The utility model provides a variable air intake lampblack absorber, its includes the host computer, the air intake has been seted up to the front end of host computer, the back of oil filter screen covers through guiding mechanism installs the air door plant, the air door plant moves with the relative oil filter screen under power unit's drive to change the effective air inlet area of oil filter screen, thereby adjust the wind pressure of air intake. The invention has the beneficial effects that when a user performs quick frying or generates instant big oil smoke, the power mechanism drives the air door plate to move, part of the oil filter screen is properly shielded, and the effective air inlet area is reduced. According to Bernoulli principle, under the condition that the power of the smoking module is unchanged, the reduction of the air inlet cross section area can obviously improve the air flow velocity at the air inlet, so that the negative pressure (wind pressure) at the air inlet is sharply enhanced. The concentrated strong negative pressure area can tightly grasp the oil smoke with extremely strong rising force and prevent the oil smoke from escaping to the periphery.

Inventors

  • Mai haizhan
  • MEI DEJIN
  • ZENG QINGJUN

Assignees

  • 广东合胜电气有限公司

Dates

Publication Date
20260505
Application Date
20251224

Claims (10)

  1. 1. The utility model provides a variable air intake lampblack absorber, its includes host computer (1), air intake (2) have been seted up to the front end of host computer (1), air intake (2) department cover is installed oil filter screen (3), the top of host computer (1) is provided with wind cabinet (4), install the smoking module in wind cabinet (4), the smoking module during operation is inhaled the oil smoke from air intake (2) through host computer (1) to discharge from exhaust port (41) at wind cabinet (4) top, wherein, the back of oil filter screen (3) covers through guiding mechanism installs air door plant (5), air door plant (5) are relative oil filter screen (3) motion under power unit's drive to change the effective air inlet area of oil filter screen (3), thereby adjust the wind pressure of air intake (2).
  2. 2. The variable air inlet range hood according to claim 1, wherein the guide mechanism comprises guide rails (6) arranged on two sides of the oil filter screen (3), a fixed rail (61) of the guide rails (6) is connected with the host machine (1), and a movable rail (62) of the guide rails (6) is fixed with the air door plate (5).
  3. 3. The range hood with the variable air inlet according to claim 2, wherein oil baffle plates (7) are arranged in the host machine (1) at positions corresponding to two sides of the oil filter screen (3), and the fixed rail (61) is fixedly arranged on the oil baffle plates (7).
  4. 4. A variable air inlet range hood according to claim 1 is characterized in that the power mechanism comprises a speed reducer (81) connected with a motor (8), an output shaft (82) of the speed reducer (81) is connected with a driving arm (83), the air door plate (5) is hinged with one end of a connecting rod (84), and the other end of the connecting rod (84) is hinged with the driving arm (83).
  5. 5. A variable intake range hood according to claim 4, characterized in that the back of the damper plate (5) is covered with a reinforcing plate (51), and the connecting rod (84) is hinged to the reinforcing plate (51) so as to be hinged to the damper plate (5).
  6. 6. A variable intake range hood according to claim 4, characterized in that the motor (8) is a stepper motor.
  7. 7. The range hood with the variable air inlet according to claim 4, wherein the motor (8) is a servo motor.
  8. 8. The range hood with the variable air inlet according to claim 1, wherein a panel (9) is arranged on the front surface of the main machine (1), and a smoke guide plate (91) is movably arranged on the panel (9) at a position corresponding to the air inlet (2).
  9. 9. A variable intake range hood according to claim 8, characterized in that the smoke guide plate (91) is mounted on the panel (9) by a flap mechanism.
  10. 10. A range hood with a variable air inlet as claimed in claim 2, wherein the guide rail (6) is installed laterally or horizontally.

Description

Variable air intake lampblack absorber Technical Field The invention relates to the technical field of range hoods, in particular to a range hood with a variable air inlet. Background The range hood is used as an essential cleaning electric appliance for modern home kitchens, and has the main function of sucking oil smoke generated in the cooking process and purifying the kitchen environment. Existing extractor hoods typically include a main unit, a hood, a fan system (smoking module), and an oil screen at the air intake. When the oil smoke exhauster works, the motor drives the impeller to rotate at a high speed, and a negative pressure area is formed at the air inlet, so that the oil smoke is sucked into the oil smoke exhauster and discharged out of the air. However, the structure of the air inlet of the prior art range hood is generally fixed, and the single structure has the following significant disadvantages and shortcomings when facing a complex practical use environment: 1. Firstly, the instant big oil fume under the 'quick-frying' working condition cannot be dealt with. The area of the air inlet of the existing range hood is fixed when the existing range hood leaves a factory. According to the fluid mechanics principle, under the condition of a certain air quantity, the larger the air inlet sectional area is, the lower the average air speed and the negative pressure intensity at the air inlet are relatively. When a user performs Chinese type quick-frying, oil smoke is generated in a large quantity instantaneously and accompanied by strong heat rising force. At this time, although the whole air volume can be increased by increasing the rotation speed of the motor, the area of the air inlet is always maximized and is fixed, the suction force (negative pressure) is still distributed on the larger air inlet area, so that the adsorption force on the unit area is relatively dispersed, a concentrated strong negative pressure area can not be formed to grasp and suck the instantaneously exploded oil smoke before diffusion, and the oil smoke is easy to escape. 2. Secondly, the problem of air volume attenuation caused by 'common flue congestion' cannot be effectively solved. With the popularization of high-rise houses, most households adopt a mode of sharing a common flue for smoke discharge. During peak periods of dining (such as noon or evening), a plurality of households in the whole building cook and start the range hood simultaneously. At this time, the air flow density in the common flue is extremely high, and the pressure (back pressure) in the flue increases sharply. For the existing range hood with a fixed air inlet, when the back pressure of a smoke outlet is obviously increased, the working condition point of a fan can drift, so that the actual effective air exhaust amount is sharply reduced. Under the abominable operating mode of this kind of high backpressure, high resistance, current fixed air inlet structure can't carry out dynamic adjustment according to external environment pressure, leads to the lampblack absorber even full speed operation also can't overcome the flue resistance, causes the suction and exhaust efficiency to drop seriously, appears discharging fume unsmooth, the condition that the oil smoke detained in the kitchen even, can't satisfy the user's in the peak period user demand, consequently it is necessary to do further improvement to it. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides the variable air inlet range hood which has the advantages of simple structure and low manufacturing cost, and can change the area of the air inlet according to the actual working condition so as to adjust the wind pressure distribution and the suction and exhaust characteristics. The invention aims at realizing the mode that the variable air inlet range hood comprises a main machine, wherein the front end of the main machine is provided with an air inlet, an oil filter screen is arranged at the air inlet in a covering way, the top of the main machine is provided with an air cabinet, a smoking module is arranged in the air cabinet, when the smoking module works, oil smoke is sucked from the air inlet through the main machine and is discharged from a smoke outlet at the top of the air cabinet, the back surface of the oil filter screen is provided with an air door plate in a covering way through a guide mechanism, and the air door plate moves relative to the oil filter screen under the driving of a power mechanism so as to change the effective air inlet area of the oil filter screen, thereby adjusting the wind pressure of the air inlet. The guide mechanism comprises guide rails arranged on two sides of the oil filter screen, a fixed rail of each guide rail is connected with the host machine, and a movable rail of each guide rail is fixed with the air door plate. Further, oil baffle plates are arranged in the host corresponding to the two sides of the