CN110274288B

CN110274288B - Liquid level display device and range hood applying same

Info

Publication number: CN110274288B
Application number: CN201910445329.1A
Authority: CN
Inventors: 吴望晨
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-05-27
Filing date: 2019-05-27
Publication date: 2020-07-28
Anticipated expiration: 2039-05-27
Also published as: CN110274288A

Abstract

The invention discloses a liquid level display device, which comprises an infrared laser transmitter, wherein a transmitting head of the infrared laser transmitter faces downwards vertically, and the liquid level display device is characterized in that: still including the support that is used for setting up in the container of splendid attire liquid, with support swing joint's reflection part, the reflection part includes pivot and reflector plate, the reflector plate is located infrared laser emitter below and sets up on the support through the pivot, the reflector plate can be in the liquid level reachs the primary importance before the default and the second place that rises along with the liquid level when the liquid level reachs the default, the reflector plate is the vertical state parallel with the infrared beam of infrared laser emitter transmission when the primary importance, the reflector plate is the state with vertical direction slope when the second place to can reflect the infrared beam of infrared laser emitter transmission. Also discloses a range hood applying the liquid level display device.

Description

Liquid level display device and range hood applying same

Technical Field

The invention relates to an oil fume purification device, in particular to a liquid level display device and a range hood applying the liquid level display device.

Background

The range hood is used as an electrical appliance product for pumping and exhausting oil smoke, the oil smoke also needs to be intercepted, filtered and collected, generally, an oil cup is arranged, most of waste oil intercepted by the range hood can be guided into the oil cup through structural design, and a user needs to pour the waste oil in the oil cup regularly. The oil cup needs to be provided with a liquid level indicator, so that a user can conveniently check whether the waste oil in the oil cup is enough or not and needs to be dumped. Generally, a transparent or semitransparent plastic oil cup is adopted, the lower end of a range hood is generally exposed above flame of a stove, the material needs to meet the flame-retardant requirement in the general safety standard of an electric appliance, and the selectable material is limited.

Or as disclosed in chinese patent application No. 201220658778.8, the visual oil cup of range hood comprises an oil cup shell and a transparent inner oil cup, wherein a visible window is formed on the front surface of the oil cup shell, scale lines are formed on the visible window, two triangular snap springs are arranged inside the oil cup shell, the triangular snap springs fix the transparent inner oil cup so that the fixed transparent inner oil cup is placed in the oil cup shell, and the oil cup shell is made of stainless steel or other materials consistent with the range hood body. The oil cup is made of metal materials, the perspective window made of transparent materials is fixedly connected to the oil cup, a user can conveniently observe the liquid level of waste oil, the metal oil cup and the perspective window are generally fixed by using viscose due to the requirements on appearance and tightness, and faults that the perspective window is broken or falls off and the like due to stress borne by the oil mass perspective window caused by different coefficients of thermal expansion easily occur.

For this reason, some range hoods capable of measuring liquid level have been proposed, such as the oil level detection device disclosed in chinese patent application No. 201720809303.7, which is applied to a range hood and includes an oil cup, the device includes a controller, a distance sensor, a memory, and a communication module, the distance sensor, the memory, and the communication module are all electrically connected to the controller, the distance sensor is configured to detect a distance from an oil surface in the oil cup, the controller is configured to calculate an oil level height in the oil cup according to the distance between the distance sensor and the oil surface, compare the oil level height with an early warning height, and send an alarm message to the communication module if the oil level height is greater than or equal to the early warning height. The detection device for determining the liquid level through the detection distance is mostly adopted in the prior art, but the mode of detecting the liquid level needs to be calculated, and a user is informed in an alarm mode, so that the detection device is complex and not visual enough.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a liquid level display device, which has a simplified structure and is intuitive to display, in view of the problems existing in the prior art.

The second technical problem to be solved by the invention is to provide a range hood with the liquid level display device.

The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides a liquid level display device, includes infrared laser emitter, infrared laser emitter's transmission head is vertical downwards, its characterized in that: still including the support that is used for setting up in the container of splendid attire liquid, with support swing joint's reflection part, the reflection part includes pivot and reflector plate, the reflector plate is located infrared laser emitter below and sets up on the support through the pivot, the reflector plate can be in the liquid level reachs the primary importance before the default and the second place that rises along with the liquid level when the liquid level reachs the default, the reflector plate is the vertical state parallel with the infrared beam of infrared laser emitter transmission when the primary importance, the reflector plate is the state with vertical direction slope when the second place to can reflect the infrared beam of infrared laser emitter transmission.

In order to facilitate the movement of the reflector plate relative to the bracket, the bracket is provided with a mounting hole, and the rotating shaft is inserted into the mounting hole and can lift and rotate relative to the mounting hole.

Preferably, in order to ensure that the reflector plate reflects light in a step form when the liquid level reaches and avoid fuzzy indication of light spots from small to large in the process of rising the liquid level, the mounting hole comprises a first hole and a second hole positioned above the first hole, the first hole is communicated with the second hole, and the second hole is a longitudinally extending semi-elliptical hole and is formed by the fact that the top of the first hole protrudes upwards; the pivot is the ellipse, second hole and pivot adaptation, the minor axis of reflector plate and pivot, major axis all become the angular design to make the reflector plate be the slope when the second place.

In order to facilitate the rotating shaft to enter and leave the second hole, the front side of the joint of the first hole and the second hole is higher than the rear side.

In order to avoid the separation of the rotating shaft and the bracket, the bracket further comprises a blocking piece, and the size of the blocking piece is larger than that of the mounting hole and is positioned on one side of the mounting hole, which is far away from the reflector plate.

In order to facilitate the uneven quality of the reflector plate and enable the reflector plate to be vertical when not subjected to external force, a convex block is arranged on one side of the reflector plate, and the convex block and the rotating shaft are respectively positioned on two adjacent sides of the reflector plate.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the utility model provides an applied liquid level display device's range hood as above, includes collection petticoat pipe, its characterized in that: the liquid container is provided with an oil cup at the bottom of the rear side of the fume collecting hood, and the oil cup comprises a front wall, a bottom wall, a rear wall and left and right side walls, so that the oil cup with an upper opening is formed.

In order to facilitate the change of the liquid level to be displayed on the range hood more intuitively, a smoke collecting cavity which is sunken upwards is formed in the smoke collecting hood, an air inlet is formed in the top of the smoke collecting cavity on the smoke collecting hood, a rectifying plate is arranged in the smoke collecting cavity and below the air inlet, the rectifying plate is positioned on the front side of the oil cup and higher than the oil cup, the rectifying plate comprises a rectifying part and a display part for displaying infrared beams reflected by the emitting part, and the display part is positioned on the rear side of the rectifying part and gradually inclines downwards from front to back.

In order to ensure that the reflector plate can reflect the infrared light beams to the display part, the included angle between the reflector plate and the vertical direction in the second position is α, the included angle between the display part of the rectifying plate and the horizontal direction is β, and the two included angles satisfy the relation that β is less than 2 α -90 degrees.

In order to avoid the reflected infrared light beam being blocked by the front wall of the oil cup, the included angle between the reflector plate and the vertical direction is α when the reflector plate is at the second position, the distance from the vertical line passing through the center of the second hole of the mounting hole of the bracket to the front end of the bottom wall of the oil cup is a, the included angle between the front wall of the oil cup and the horizontal direction is gamma, the distance from the horizontal line passing through the center of the second hole of the mounting hole of the bracket to the bottom wall of the oil cup is H, the distance from the upper edge of the front wall of the oil cup to the bottom wall of the oil cup is H, and the parameters meet the following relation that H < H + (a + H/tan gamma) tan (2 α -90 degrees).

Compared with the prior art, the invention has the advantages that: the reflecting piece which can change between two positions along with the liquid level and can reflect the infrared light beam only at one position to form a light spot is arranged, and the liquid level information corresponding to the light spot can be visually passed through, so that the structure is simple, and a complex algorithm is avoided; through the cooperation with range hood's cowling panel, can conveniently acquire liquid level information.

Drawings

FIG. 1 is a schematic view of a range hood according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a range hood in accordance with an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion I of FIG. 2;

FIG. 4 is a partial schematic view of a fluid level display apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic view of a reflector plate of the liquid level display apparatus according to the embodiment of the present invention;

FIG. 6 is a schematic view of a bracket of the liquid level display apparatus according to the embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

Referring to fig. 1 to 3, a range hood includes a fume collecting hood 1 and a box body 2 disposed above the fume collecting hood 1, wherein the box body 2 is used for disposing a power system, such as a centrifugal fan. An upwards sunken smoke collecting cavity 11 is formed in the smoke collecting cover 1, and an air inlet 12 is formed in the smoke collecting cover 1 at the top of the smoke collecting cavity 11. A rectifying plate 3 is arranged in the smoke collecting cavity 11 and below the air inlet 12, and an oil cup 4 is arranged at the bottom of the rear side of the smoke collecting cover 1. The oil cup 4 includes a front wall 41, a bottom wall 42, a rear wall 43, and left and right side walls 44, thereby constituting the oil cup 4 having an upper opening.

Liquid level display devices are arranged in the smoke collecting hood 1 and the oil cup 4 and comprise an infrared laser emitter 51 arranged at the bottom of the smoke collecting hood 1 and positioned above the oil cup 4, a reflecting piece 52 arranged in the oil cup 4 and a bracket 53. The reflector 52 is located below the infrared laser transmitter 51, and the emission head of the infrared laser transmitter 51 passes vertically downward through the smoke collection hood 1, whereby the infrared beam can be emitted vertically downward. The reflecting piece 52 is movably arranged on the bracket 53, so that the angle of the reflecting piece 52 is limited by the bracket 53, and the bottom of the bracket 53 is fixedly connected with the bottom of the oil cup 4.

The rectifying plate 3 is positioned on the front side of the oil cup 4 and is higher than the oil cup 4. The rectification plate 3 includes a rectification portion 31 and a display portion 32, the display portion 32 is located on the rear side of the rectification portion 31, and the display portion 32 is gradually inclined downward from the front to the rear.

Referring to fig. 4 to 6, the reflector 52 includes a rotating shaft 521 and a reflective sheet 522 connected to the rotating shaft 521. Wherein, the rotating shaft 521 is elliptical, and the reflective sheet 522 is disposed on the bracket 53 through the rotating shaft 521. One side of the reflector sheet 522 is provided with a convex block 523, and the convex block 523 and the rotating shaft 521 are respectively positioned on two adjacent sides of the reflector sheet 522, so that the overall mass of the reflector 52 is unevenly distributed, and the reflector sheet 522 is kept in a vertical state and is parallel to the infrared light beam emitted by the infrared laser emitter 51 when the liquid level does not reach the reflector sheet 522 in the rising process, so that the infrared light beam is not reflected. The emitter 52 further comprises a stop piece 524 positioned on a side of the rotation axis 521 remote from the reflective sheet 522. The minor axis and the major axis of the reflector 522 and the rotating shaft 521 are both designed to be angled.

The bracket 53 extends longitudinally in the oil cup 4, a mounting hole 531 is formed in the bracket, the mounting hole 531 is of an asymmetric structure, and the rotating shaft 521 is inserted into the mounting hole 531 to complete the mounting of the reflecting member 52 and the bracket 53. The blocking piece 524 is larger than the mounting hole 531 and is located on the side of the mounting hole 531 away from the reflective sheet 522 to prevent the reflective sheet 522 from being separated from the bracket 53.

The mounting holes 531 are asymmetric structures, so that the reflector sheet 522 can reflect light in a step form when the liquid level reaches, and fuzzy indication that light spots are from small to large in the liquid level rising process is avoided. In the present embodiment, the mounting holes 531 include a first hole 5311 and a second hole 5312 located above the first hole 5311, the first hole 5311 and the second hole 5312 communicate, and the second hole 5312 is a longitudinally extending semi-elliptical hole formed by the top of the first hole 5311 protruding upward. The second hole 5312 is fitted to the rotary shaft 521. The front side at the junction of the first aperture 5311 and the second aperture 5312 is higher than the back side. When the liquid level in the oil cup 4 does not reach the reflection sheet 522, the reflection sheet 522 can rotate forwards and tilt to be kept in a vertical state, so that the reflection infrared beam is prevented from floating upwards along with the rise of the liquid level when the liquid level rises to be in contact with the reflection sheet 522, the rotating shaft 521 enters the second hole 5312 upwards from the first hole 5311 in a rotating mode and rotates to a preset reflection angle, the liquid level reaches a preset value (the value is related to the height of the installation hole 531 relative to the bottom of the oil cup 4), and the reflection sheet 522 gradually tilts upwards from front to back (in the state, the lug 523 is located on the front side of the reflection sheet 522).

The angle between the reflector plate 522 and the vertical direction is α, the angle between the display part 32 of the rectifying plate 3 and the horizontal direction is β, so that the reflector plate 522 can reflect the infrared light beam onto the display part 32 when the liquid level reaches a preset value, the two requirements satisfy the following relations that β <2 α -90 degrees, the distance from the vertical line passing through the center of the second hole 5312 of the mounting hole 531 of the bracket 53 to the front end of the bottom wall 42 of the oil cup 4 is a, the angle between the front wall 41 of the oil cup 4 and the horizontal direction is gamma, the distance from the horizontal line passing through the center of the second hole 5312 of the mounting hole 531 of the bracket 53 to the bottom wall 42 of the oil cup 4 is H (namely the liquid level preset value indicating the height of the liquid level), the distance from the upper edge of the front wall 41 of the oil cup 4 to the bottom wall 42 of the oil cup 4 is H, and the parameters need to satisfy the following relations that H < H + (a + H/tan (2 α -90 degrees) is required to avoid the infrared light beam being.

In the use process of the range hood, the infrared laser transmitter 51 keeps vertically emitting the infrared beam downwards, and when the liquid level in the oil cup 4 reaches a preset value, the emitting piece 522 is kept in the original position (the first position) without buoyancy, is in a vertical state, and is parallel to the infrared beam at the moment and cannot reflect the infrared beam. When the liquid level in the oil cup 4 rises to a preset value, the reflecting sheet 522 floats to a corresponding height (a second position) to be inclined, and the reflecting sheet 522 reflects the infrared light beam to the display part 32 of the rectifying plate 3, so that a user can observe a red light spot on the display part 32 and prompt the user to pour the waste oil in the oil cup 4.

Claims

1. A liquid level display device comprising an infrared laser transmitter (51), the transmitting head of the infrared laser transmitter (51) facing vertically downwards, characterized in that: the infrared laser emitter is characterized by further comprising a support (53) arranged in a container for containing liquid and a reflecting piece (52) movably connected with the support (53), wherein the reflecting piece (52) comprises a rotating shaft (521) and a reflecting sheet (522), the reflecting sheet (522) is located below the infrared laser emitter (51) and arranged on the support (53) through the rotating shaft (521), the support (53) is provided with a mounting hole (531), and the rotating shaft (521) is inserted into the mounting hole (531) and can lift and rotate relative to the mounting hole (531); the reflector plate (522) can be located at a first position before the liquid level reaches a preset value and at a second position rising along with the liquid level when the liquid level reaches the preset value, the reflector plate (522) is in a vertical state parallel to the infrared beams emitted by the infrared laser emitter (51) when located at the first position, and the reflector plate (522) is in a state inclined to the vertical direction when located at the second position, so that the infrared beams emitted by the infrared laser emitter (51) can be reflected.

2. The fluid level display apparatus of claim 1, wherein: the mounting holes (531) comprise a first hole (5311) and a second hole (5312) positioned above the first hole (5311), the first hole (5311) and the second hole (5312) are communicated, and the second hole (5312) is a semi-elliptical hole extending longitudinally and is formed by the top of the first hole (5311) protruding upwards; the rotating shaft (521) is oval, the second hole (5312) is matched with the rotating shaft (521), and the minor axis and the major axis of the reflector sheet (522) and the rotating shaft (521) are both designed in an angled mode, so that the reflector sheet (522) can be inclined in the second position.

3. The fluid level display apparatus of claim 2, wherein: the front side of the junction of the first aperture (5311) and the second aperture (5312) is higher than the rear side.

4. The fluid level display apparatus of claim 1, wherein: the LED lamp further comprises a blocking piece (524), wherein the size of the blocking piece (524) is larger than that of the mounting hole (531), and the blocking piece is positioned on one side, far away from the reflecting piece (522), of the mounting hole (531).

5. The liquid level display device according to any one of claims 1 to 4, wherein: one side of the reflection sheet (522) is provided with a convex block (523), and the convex block (523) and the rotating shaft (521) are respectively positioned on two adjacent sides of the reflection sheet (522).

6. A range hood applying the liquid level display device as claimed in any one of claims 2-5, comprising a fume collecting hood (1), characterized in that: the liquid container is characterized in that an oil cup (4) is arranged at the bottom of the rear side of the smoke collecting hood (1), and the oil cup (4) comprises a front wall (41), a bottom wall (42), a rear wall (43) and left and right side walls (44), so that the oil cup (4) with an upper opening is formed.

7. The range hood of claim 6, wherein: form in collection petticoat pipe (1) and upwards sunken collection smoke chamber (11), air intake (12) have been seted up at the top that lies in collection smoke chamber (11) on collection petticoat pipe (1), in collection smoke chamber (11), the position that lies in air intake (12) below is provided with cowling panel (3), cowling panel (3) are located oil cup (4) front side and are higher than oil cup (4), cowling panel (3) include display portion (32) of infrared light beam of rectifying part (31), display transmitting part (52) reflection, display portion (32) are located rectifying part (31) rear side and display portion (32) by preceding back downward sloping gradually.

8. The range hood according to claim 7, wherein the angle between the reflective sheet (522) and the vertical direction in the second position is α, the angle between the display part (32) of the current plate (3) and the horizontal direction is β, and the two angles satisfy β <2 α -90 °.

9. The range hood according to claim 7, wherein the angle between the reflective sheet (522) and the vertical direction is α, the distance between the vertical line passing through the center of the second hole (5312) of the mounting hole (531) of the bracket (53) and the front end of the bottom wall (42) of the oil cup (4) is a, the angle between the front wall (41) of the oil cup (4) and the horizontal direction is γ, the distance between the horizontal line passing through the center of the second hole (5312) of the mounting hole (531) of the bracket (53) and the bottom wall (42) of the oil cup (4) is H, the distance between the upper edge of the front wall (41) of the oil cup (4) and the bottom wall (42) of the oil cup (4) is H, and the above parameters satisfy the following relationship of H < H + (a + H/tan γ) tan (2 α -90 °).