CN114575111A - Liquid level detection device and washing machine with same - Google Patents
Liquid level detection device and washing machine with same Download PDFInfo
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- CN114575111A CN114575111A CN202210174827.9A CN202210174827A CN114575111A CN 114575111 A CN114575111 A CN 114575111A CN 202210174827 A CN202210174827 A CN 202210174827A CN 114575111 A CN114575111 A CN 114575111A
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- 239000007788 liquid Substances 0.000 title claims abstract description 137
- 238000001514 detection method Methods 0.000 title claims abstract description 102
- 238000005406 washing Methods 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000009471 action Effects 0.000 claims abstract description 12
- 230000000670 limiting effect Effects 0.000 claims description 22
- 230000008859 change Effects 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 5
- 101150114468 TUB1 gene Proteins 0.000 description 15
- 238000004364 calculation method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000003467 diminishing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/087—Water level measuring or regulating devices
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/18—Washing liquid level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses a liquid level detection device and a washing machine with the same. The air bag is positioned outside the first container and is communicated with the inner cavity of the first container; the first container is filled with liquid in the inner cavity and is communicated with the second container through a pipeline; the inner cavity of the second container is provided with a pressing plate capable of moving along the axial direction of the pressing plate, an air cavity is arranged on one side of the pressing plate, which is contacted with the liquid, and a light beam detection point is arranged on one side of the air cavity, which is far away from the liquid; and the light beam emitter is arranged on the second container and emits light beams into the second container to the light beam detection points after the light beams sequentially pass through the liquid and the air cavity. The air bag is pressed to discharge liquid in the first container and then flow into the second container, and the pressure applied to the air bag is obtained according to the position of the light beam reaching the detection point of the light beam, so that the height of the water level is obtained. Simple structure, simple installation, the liquid level detection device only carries out liquid level detection, does not participate in other actions of washing machine, has reduced the equipment loss.
Description
Technical Field
The invention belongs to the field of washing machines, and particularly relates to a liquid level detection device and a washing machine with the same.
Background
The washing machine needs to detect the water level in the washing bucket during washing, and the existing liquid level detection device has a complex structure and is inconvenient to use.
The application number is 202120258439.X Chinese patent discloses a liquid level detection device and a washing machine with the same, wherein the liquid level detection device is used for detecting liquid level and controlling related actions during water storage and drainage of the washing machine, and the operations except for the liquid level detection function are inevitably required, and the water storage and drainage actions of the washing machine occur for many times in the washing process, so that the operation is inconvenient, and equipment faults are easily caused due to more mechanisms.
The present invention has been made in view of this point.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a liquid level detection device which is simple in equipment structure, convenient and fast to install and reliable in operation.
The invention also aims to provide a washing machine with the liquid level detection device.
In order to solve the technical problems, the invention adopts the technical scheme that:
a liquid level detection device comprises a first container, an air bag, a second container, a light beam emitter and a pressing plate.
The air bag is positioned outside the first container and is communicated with the inner cavity of the first container; the first container is filled with liquid in the inner cavity and is communicated with the second container through a pipeline; the inner cavity of the second container is provided with a pressing plate capable of moving along the axial direction of the pressing plate, an air cavity is arranged on one side of the pressing plate, which is contacted with the liquid, and a light beam detection point is arranged on one side of the air cavity, which is far away from the liquid; and the light beam emitter is arranged on the second container and emits light beams into the second container to the light beam detection points after the light beams sequentially pass through the liquid and the air cavity.
Through setting up the gas pocket that first container outside set up and first container inner chamber intercommunication to be connected with the second container through the pipeline, can change and then make the gas pocket volume by big when diminishing at the pressure that the gas pocket receives, with the first container of liquid discharge in the first container and then flow into the second container through the pipeline, perhaps when the pressure that the gas pocket receives changes and then makes the gas pocket volume by little grow, the liquid that will flow into in the second container passes through the pipeline and flows back to the first container. When the liquid in the first container is discharged into the second container, the thickness of the liquid in the second container along the axial direction thereof is increased,
because the second container is provided with the light beam emitter for emitting light beams into the second container, the light beams sequentially pass through the liquid and the air cavity and then are emitted to the light beam detection point. The light beam emitted by the light beam emitter has different refractive indexes at the boundary of liquid and air according to different thicknesses of the liquid, and finally the positions of light beam detection points reached by the light beam are also different. According to the position of the light beam detection point where the light beam arrives and the pressure intensity applied to the air bag, logic calculation is carried out, digital modeling is utilized to establish the corresponding relation between the light beam detection point and the air bag, and then when the liquid level detection device is applied to water level detection of the washing machine, the relation between the pressure intensity applied to the air bag and the height of the water level in the washing bucket is calculated, namely the corresponding relation between the position of the light beam detection point where the light beam arrives and the height of the water level in the washing bucket can be established, so that the height of the water level in the washing bucket can be obtained according to the position of the light beam detection point where the light beam arrives.
Furthermore, the pressure plate divides the inner cavity of the second container into a first inner cavity and a second inner cavity, the first inner cavity is communicated with the first container, and the second inner cavity is isolated from the first container but communicated with the outside; a spring is arranged between the pressure plate and the second container wall, and the pressure plate can move under the action of liquid and the spring to change the size of the first inner cavity.
When the air bag is pressurized, the liquid in the first container flows into the second container, so that a pressure plate is arranged in the inner cavity of the second container, the pressure plate divides the inner cavity of the second container into a first inner cavity and a second inner cavity, the first inner cavity is communicated with the first container, and the second inner cavity is isolated from the first container but communicated with the outside; thus, when the liquid in the first container flows into the second container, the pressure plate is pushed to move, so that the first inner cavity part is enlarged to contain the liquid; the second inner cavity of the second container is isolated from the first container and communicated with the outside, so that the pressure plate is not subjected to resistance due to air compression when moving.
When the pressure applied to the outside of the air bag is reduced, the liquid flowing into the second container from the first container is pressed back to the first container, so that a power device is required to be arranged in the inner cavity of the second container to provide power to drive the pressing plate to move and compress the volume of the first inner cavity.
Furthermore, a hole is formed in the barrel wall of the second container, which forms the first inner cavity of the second container and is opposite to the pressing plate, and the light beam emitter is installed in the hole.
Because be provided with the light beam transmitter on the second container and to the second container internal beam, the light beam shoots the light beam check point after liquid and air chamber in proper order, and the one side that the clamp plate contacted liquid is provided with the air chamber, the one side that the air chamber deviates from liquid is provided with the light beam check point, therefore will set up the hole on the first inner chamber of formation second container and the second container bucket wall relative with the clamp plate, the light beam transmitter is installed downtheholely, the light beam that the light beam transmitter transmitted can shoot the light beam check point after liquid in the first inner chamber of second container and the air chamber on the clamp plate in proper order like this.
Furthermore, the light beam emitter is installed in an inclined mode, the light beam emitter is installed on one side of the central axis of the second container, and the other side of the central axis of the second container is inclined.
Because the light is refracted after passing through the liquid and the air, in order to enable the light to have enough space to fall on the light beam detection point after being refracted and not to exceed the light beam detection point so that the light beam detection point cannot detect the refracted light, the light beam emitter is installed in an inclined mode, and the light beam emitter is installed on one side of the central axis of the second container and is installed on the other side in the inclined mode.
Further, the light beam detection point and the light beam emitter are respectively arranged on two sides of the central axis of the second container.
As described above, since the light is refracted after passing through the liquid and the air, in order to allow the light to have enough space to fall on the beam detection point after being refracted so as not to exceed the beam detection point and make the beam detection point unable to detect the refracted light, the beam detection point and the beam emitter are respectively disposed on both sides of the central axis of the second container, and the beam emitter is installed in an inclined manner on one side of the central axis of the second container and on the other side, so that the refracted light can be irradiated on the beam detection point.
Furthermore, a spring is arranged in the second inner cavity, and two ends of the spring respectively support against the pressing plate and the wall of the second container barrel opposite to the pressing plate.
In order to facilitate installation and avoid corrosion of the spring, the spring is arranged in the second inner cavity, and two ends of the spring respectively abut against the pressing plate and the second container barrel wall opposite to the pressing plate.
Furthermore, the liquid level detection device further comprises a pressing plate limiting rod, a second inner cavity is formed, a hole is formed in the wall of the second container barrel opposite to the pressing plate, one end of the pressing plate limiting rod is fixedly connected with the pressing plate, the other end of the pressing plate limiting rod penetrates out of the hole, and the spring is sleeved outside the pressing plate limiting rod.
In order to stabilize the pressing plate in the moving process and ensure that the pressing plate does not incline to prevent the liquid in the first inner cavity part from leaking, the liquid level detection device further comprises a pressing plate limiting rod, a hole is formed in the wall of the second container barrel which forms the second inner cavity and is opposite to the pressing plate, one end of the pressing plate limiting rod is fixedly connected with the pressing plate, the other end of the pressing plate limiting rod penetrates out of the hole, and the spring is sleeved outside the pressing plate limiting rod. Through the matching limiting effect of the pressure plate limiting rod and the hole, the pressure plate cannot overturn when moving, so that liquid in the first inner cavity part is prevented from leaking.
Further, the spring is a compression spring.
The spring is a compression spring because it is mounted in the second chamber and the spring is required to generate a force to compress the volume of the first chamber portion.
The invention also relates to a washing machine, which is provided with the liquid level detection device, wherein the liquid level detection device is fixed below the washing barrel, and the air bag can be contacted with water at the bottom of the washing barrel.
The air bag pressure change is adopted to further enable the liquid to flow from the first container to the second container, and the thickness of the liquid in the second container is changed, so that the positions of the light beams reaching the light beam detection points after the light beams are refracted are different, the water level in the washing bucket is further known, and the air bag is required to be in contact with the water at the bottom of the washing bucket to guarantee the most accurate detection. Therefore, the liquid level detection device is fixed below the washing bucket, and the air bag can be contacted with water at the bottom of the washing bucket.
Furthermore, a hole is formed in the bottom of the washing tub, the first container is fixedly connected to the lower portion of the washing tub and seals the bottom of the hole, and the air bag is located in the hole.
Through set up the hole in the pail bottom, place the gas package in the hole and the water contact of pail bottom to make the hydroenergy in the pail act on the gas package, the aperture is greater than the gas package maximum diameter. To prevent leakage, the first container is fixedly coupled to a lower portion of the tub and seals a bottom of the aperture.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
The invention discloses a liquid level detection device and a washing machine with the same. The air bag is positioned outside the first container and is communicated with the inner cavity of the first container; the first container is filled with liquid in the inner cavity and is communicated with the second container through a pipeline; the inner cavity of the second container is provided with a pressing plate capable of moving along the axial direction of the pressing plate, an air cavity is arranged on one side of the pressing plate, which is contacted with the liquid, and a light beam detection point is arranged on one side of the air cavity, which is far away from the liquid; and the light beam emitter is arranged on the second container and emits light beams into the second container to the light beam detection points after the light beams sequentially pass through the liquid and the air cavity. The air bag is pressed to discharge the liquid in the first container and then flow into the second container, the thickness of the liquid in the second container along the axial direction of the second container is increased, and the light beam emitter is arranged on the second container to emit light beams into the second container, and the light beams sequentially pass through the liquid and the air cavity and then are emitted to the light beam detection point. The light beam emitted by the light beam emitter has different refractive indexes at the boundary of liquid and air according to different thicknesses of the liquid, and finally the positions of light beam detection points reached by the light beam are also different. And acquiring the pressure applied to the air bag according to the position of the light beam detection point reached by the light beam.
The invention also provides a washing machine, which is provided with the liquid level detection device, and the height of the water level in the washing bucket is calculated according to the pressure applied to the air bag, so that the corresponding relation between the position of the light beam detection point reached by the light beam and the height of the water level in the washing bucket can be established, and the height of the water level in the washing bucket can be obtained according to the position of the light beam detection point reached by the light beam. The liquid level detection device is simple in structure and convenient to install, only carries out liquid level detection, does not participate in other actions of the washing machine, greatly reduces equipment loss, and avoids equipment failure possibility caused by participation in unnecessary actions.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic view of the installation of the liquid level detection unit of the present invention in a washing machine;
fig. 2 is a partially enlarged schematic view of fig. 1.
FIG. 3 is a schematic view of the installation of the liquid level detecting device in the washing machine according to the second embodiment of the present invention;
fig. 4 is a partially enlarged schematic view of fig. 3.
In the figure: 1. a washing tub; 2. a first container; 3. a second container; 4. air bags; 5. a light beam emitter; 6. an air chamber; 7. detecting a light beam; 8. a spring; 9. pressing a plate; 10. and a second pressure plate.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1 and 2, the liquid level detecting device of the present invention includes a first container 2, an air bag 4, a second container 3, a light beam emitter 5, and a pressure plate 9.
The air bag 4 is positioned outside the first container 2 and is communicated with the inner cavity of the first container 2; the first container 2 is filled with liquid in the inner cavity and is also communicated with the second container 3 through a pipeline; a pressing plate 9 is arranged in the inner cavity of the second container 3 and can move along the axial direction of the second container, an air cavity 6 is arranged on one side of the pressing plate 9, which is in contact with liquid, and a light beam detection point 7 is arranged on one side, which is far away from the liquid, of the air cavity 6; and the light beam emitter 5 is arranged on the second container 3 and emits light beams into the second container 3 to the light beam detection point 7 after sequentially passing through the liquid and the air cavity 6.
Through setting up the gas bag 4 of 2 outside settings of first container and 2 inner chambers of first container to be connected with second container 3 through the pipeline, can change and then make the gas bag 4 volume by big when diminishing at the pressure that gas bag 4 receives, with the first container 2 of liquid discharge in first container 2 and then flow in second container 3 through the pipeline, perhaps when gas bag 4 receives pressure changes and then makes gas bag 4 volume by little grow, the liquid that will flow in second container 3 passes through the pipeline and flows back to first container 2. When the liquid in the first container 2 is discharged into the second container 3, the thickness of the liquid in the second container 3 in the axial direction thereof increases,
because the second container 3 is provided with the light beam emitter 5 to emit light beams into the second container 3, the light beams sequentially pass through the liquid and the air cavity 6 and then are emitted to the light beam detection point 7. The light beam emitted by the light beam emitter 5 has different refractive indexes at the interface of liquid and air according to the thickness of the liquid, and finally the position of the light beam detection point 7 reached by the light beam is also different. According to the position of the light beam detection point 7 reached by the light beam and the pressure applied to the air bag 4, logic calculation is carried out, digital modeling is utilized to establish the corresponding relation between the position and the pressure applied to the air bag 4 and the height of the water level in the washing bucket 1, and then when the liquid level detection device is applied to water level detection of the washing machine, the relation between the position of the light beam detection point 7 reached by the light beam and the height of the water level in the washing bucket 1 can be established, so that the height of the water level in the washing bucket 1 can be obtained according to the position of the light beam detection point 7 reached by the light beam.
The pressure plate 9 divides the inner cavity of the second container 3 into a first inner cavity and a second inner cavity, the first inner cavity is communicated with the first container 2, and the second inner cavity is isolated from the first container 2 but communicated with the outside; a spring 8 is arranged between the pressure plate 9 and the wall of the second container 3, and the pressure plate 9 can move under the action of the liquid and the spring 8 to change the size of the first inner cavity.
When the air bag 4 is pressurized, the volume is increased and the volume is reduced, the liquid in the first container 2 flows into the second container 3, so that a pressure plate 9 is arranged in the inner cavity of the second container 3, the pressure plate 9 divides the inner cavity of the second container 3 into a first inner cavity and a second inner cavity, the first inner cavity is communicated with the first container 2, and the second inner cavity is isolated from the first container 2 and is communicated with the outside; thus, when the liquid in the first container 2 flows into the second container 3, the pressure plate 9 is pushed to move, so that the first inner cavity part is enlarged to contain the liquid; and the second inner cavity of the second container 3 is isolated from the first container 2 but communicated with the outside, so that the pressing plate 9 is not subjected to resistance due to air compression when moving.
Because the liquid flowing into the second container 3 from the first container 2 is required to be pressed back to the first container 2 when the pressure applied to the outside of the air bag 4 is reduced, a power device is required to be arranged in the inner cavity of the second container 3 to provide power to drive the pressure plate 9 to move and compress the volume of the first inner cavity, the spring 8 is arranged between the pressure plate 9 and the wall of the second container 3 in the invention, and the pressure applied to the liquid in the first container 2 is reduced due to the reduction of the pressure applied to the outside of the air bag 4, so that the pressure transmitted to the pressure plate 9 in the second container 3 is reduced, and the pressure plate 9 can move under the action of the spring 8 to reduce the size of the first inner cavity and press the liquid in the second container 3 into the first container 2.
A hole is arranged on the barrel wall of the second container 3 which forms a first inner cavity of the second container 3 and is opposite to the pressing plate 9, and the light beam emitter 5 is arranged in the hole.
Because it is provided with light beam emitter 5 and shoots the light beam in to second container 3 on second container 3, the light beam shoots to light beam detection point 7 behind liquid and air chamber 6 in proper order, and the one side that clamp plate 9 contacted liquid is provided with air chamber 6, and the one side that air chamber 6 deviates from liquid is provided with light beam detection point 7, therefore will form second container 3 first inner chamber and with 3 barrel walls of clamp plate opposite to 9 set up the hole, light beam emitter 5 is installed in the hole, the light beam that light beam emitter 5 launched can shoot to light beam detection point 7 behind the liquid in the second container 3 first inner chamber and the air chamber 6 on clamp plate 9 in proper order like this.
The light beam emitter 5 is installed obliquely, and the light beam emitter 5 is installed on one side of the central axis of the second container 3 and on the other side obliquely.
Because the light is refracted after passing through the liquid and the air, in order to make the light have enough space to fall on the light beam detection point 7 after being refracted and not exceed the light beam detection point 7, so that the light beam detection point 7 cannot detect the refracted light, the light beam emitter 5 is installed obliquely, and the light beam emitter 5 is installed on one side of the central axis of the second container 3 and is installed on the other side obliquely.
The light beam detection point 7 and the light beam emitter 5 are respectively arranged on two sides of the central axis of the second container 3.
As described above, since the light is refracted after passing through the liquid and the air, in order to make the light have enough space to fall on the beam detection point 7 after being refracted and not to exceed the beam detection point 7, so that the beam detection point 7 cannot detect the refracted light, the beam detection point 7 and the beam emitter 5 are respectively disposed at two sides of the central axis of the second container 3, and the beam emitter 5 is installed in an inclined manner, and the beam emitter 5 is installed at one side of the central axis of the second container 3 and at the other side thereof, so that the refracted light can be irradiated on the beam detection point 7.
A spring 8 is arranged in the second inner cavity, and two ends of the spring 8 respectively support against the pressing plate 9 and the barrel wall of the second container 3 opposite to the pressing plate 9.
In order to facilitate installation and avoid corrosion of the spring 8, the spring 8 is arranged in the second inner cavity, and two ends of the spring 8 respectively abut against the pressing plate 9 and the barrel wall of the second container 3 opposite to the pressing plate 9. Since the spring 8 is installed in the second inner cavity, and the spring 8 needs to generate the acting force to compress the volume of the first inner cavity part, the spring 8 is selected as the compression spring 8.
The liquid level detection device further comprises a pressing plate 9 limiting rod, a second inner cavity is formed, a hole is formed in the wall of the second container 3 opposite to the pressing plate 9, one end of the pressing plate 9 limiting rod is fixedly connected with the pressing plate 9, the other end of the pressing plate 9 limiting rod penetrates out of the hole, and the spring 8 is sleeved outside the pressing plate 9 limiting rod.
In order to make clamp plate 9 can be stable at the in-process that removes, guarantee that clamp plate 9 does not incline and prevent that the liquid in the first inner chamber part from taking place to reveal, liquid level detection device still includes the 9 gag lever posts of clamp plate, is forming the second inner chamber and is equipped with the hole on the 3 bucket walls of second container relative with clamp plate 9, and 9 gag lever posts one end fixed connection clamp plate 9 of clamp plate, and the 9 gag lever posts other end of clamp plate is worn out from the hole, and spring 8 cup joints outside 9 gag lever posts of clamp plate. Through the cooperation limiting displacement in 9 gag lever posts of clamp plate and hole, clamp plate 9 can not take place to topple when removing to guaranteed that the liquid in the first inner chamber part does not take place to reveal.
Example two
The difference between this embodiment and the first embodiment is:
referring to fig. 3-4, a second pressing plate 10 is arranged in the inner cavity of the first container 2, the diameter of the second pressing plate 10 is matched with the inner diameter of the first container 2, and a sealing ring is arranged on the periphery of the second pressing plate 10.
The second press plate 10 divides the inner cavity of the first container 2 into two parts, one part of the inner cavity is communicated with the air bag, the inner cavity of the part is filled with air, and the other part of the inner cavity is filled with liquid and is communicated with the second container through a pipeline.
The second pressing plate 10 can move axially along the first container 2, and in order to enable the second pressing plate 10 to move stably, a limiting rod is arranged on one side of the second pressing plate 10 and inserted into a connecting port between the first container 2 and the pipeline.
When the air bag 4 is compressed, air enters the inner cavity of the first container 2, so that the second pressing plate 10 is pushed to move to press liquid in the other part of the inner cavity of the first container 2 to be discharged outwards, and the liquid is discharged to the second container through a pipeline.
The invention also provides a washing machine which is provided with any one of the liquid level detection devices, the liquid level detection device is fixed below the washing tub 1, and the air bag 4 can be contacted with water at the bottom of the washing tub 1.
Because adopt the change of air pocket 4 pressure and then make liquid flow to second container 3 from first container 2, change the interior liquid thickness of second container 3 to make the position that reaches light beam check point 7 after the light refraction different, and then know the water level in the pail 1, so need can guarantee to detect the most accurate with the water contact of air pocket 4 and pail 1 bottom. Therefore, the liquid level detection device is fixed under the washing tub 1, and the air bag 4 can contact with the water in the bottom of the washing tub 1.
A hole is arranged at the bottom of the washing tub 1, the first container 2 is fixedly connected to the lower part of the washing tub 1 and seals the bottom of the hole, and the air bag 4 is positioned in the hole.
By providing holes at the bottom of the washing tub 1, the air bag 4 is placed in the holes to contact with the water at the bottom of the washing tub 1, so that the water in the washing tub 1 can act on the air bag 4, and the hole diameter is larger than the maximum diameter of the air bag 4. To prevent leakage, the first container 2 is fixedly coupled to the lower side of the tub 1 and seals the bottom of the aperture.
In the design stage of the washing machine, water is added into the washing tub 1 and the water level is detected, the air bag 4 of the liquid level detection device is compressed, the liquid in the first container 2 is squeezed to flow into the second container 3, the position of the light beam on the light beam detection point is detected,
logic calculation is carried out according to the detected water level height of the washing tub 1 and the position of the light beam on the light beam detection point, fuzzy algorithm and digital modeling are utilized, the water level height of the washing tub 1 corresponds to the position relation of the light beam on the light beam detection point, and the corresponding result is filed and written into a computer board control device of the washing machine.
When the washing machine is used by a user, water is added into the washing tub 1, the air bag 4 of the liquid level detection device is compressed under the action of pressure increase, liquid in the first container 2 flows to the second container 3, and the computer board control device of the washing machine calculates the corresponding height value of the water level in the washing tub 1 according to the position of the light beam on the light beam detection point through logic calculation and displays and transmits the height value to the user through the display device.
The invention discloses a liquid level detection device and a washing machine with the same. The air bag is positioned outside the first container and is communicated with the inner cavity of the first container; the first container is filled with liquid in the inner cavity and is communicated with the second container through a pipeline; the inner cavity of the second container is provided with a pressing plate capable of moving along the axial direction of the pressing plate, an air cavity is arranged on one side of the pressing plate, which is contacted with the liquid, and a light beam detection point is arranged on one side of the air cavity, which is far away from the liquid; and the light beam emitter is arranged on the second container and emits light beams into the second container to the light beam detection points after the light beams sequentially pass through the liquid and the air cavity. The air bag is pressed to discharge the liquid in the first container and then flow into the second container, the thickness of the liquid in the second container along the axial direction of the second container is increased, and the light beam emitter is arranged on the second container to emit light beams into the second container, and the light beams sequentially pass through the liquid and the air cavity and then are emitted to the light beam detection point. The light beam emitted by the light beam emitter has different refractive indexes at the boundary of liquid and air according to different thicknesses of the liquid, and finally, the positions of light beam detection points reached by the light beam are also different. And acquiring the pressure applied to the air bag according to the position of the light beam detection point reached by the light beam. The invention also provides a washing machine, which is provided with the liquid level detection device, and the water level height in the washing bucket is calculated according to the pressure applied to the air bag, so that the corresponding relation between the position of the light beam detection point reached by the light beam and the water level height in the washing bucket can be established, and the water level height in the washing bucket can be obtained according to the position of the light beam detection point reached by the light beam. The liquid level detection device is simple in structure and convenient to install, only carries out liquid level detection, does not participate in other actions of the washing machine, greatly reduces equipment loss, and avoids equipment failure possibility caused by participation in unnecessary actions.
The above embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention in any way, and although the present invention has been disclosed by the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications to the equivalent embodiments by using the technical contents disclosed above without departing from the technical scope of the present invention, and the embodiments in the above embodiments can be further combined or replaced, but any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (10)
1. A liquid level detection device characterized in that: comprises a first container, an air bag, a second container, a light beam emitter and a pressing plate,
the air bag is positioned outside the first container and is communicated with the inner cavity of the first container;
the first container is filled with liquid in the inner cavity and is communicated with the second container through a pipeline;
a pressing plate is arranged in the inner cavity of the second container and can move along the axial direction of the second container, an air cavity is arranged on one side of the pressing plate contacting with the liquid, a light beam detection point is arranged on one side of the air cavity deviating from the liquid,
and the light beam emitter is arranged on the second container and emits light beams into the second container to the light beam detection points after the light beams sequentially pass through the liquid and the air cavity.
2. The liquid level detecting device according to claim 1, wherein:
the pressure plate divides the inner cavity of the second container into a first inner cavity and a second inner cavity, the first inner cavity is communicated with the first container, and the second inner cavity is isolated from the first container but communicated with the outside;
a spring is arranged between the pressure plate and the second container wall, and the pressure plate can move under the action of liquid and the spring to change the size of the first inner cavity.
3. A liquid level detecting device according to claim 2, wherein: and a hole is formed in the wall of the second container barrel, which forms the first inner cavity of the second container and is opposite to the pressing plate, and the light beam emitter is arranged in the hole.
4. A liquid level detecting device according to claim 3, wherein: the light beam emitter is installed in an inclined mode, the light beam emitter is installed on one side of the central axis of the second container, and the other side of the central axis of the second container is inclined.
5. A liquid level detecting device according to claim 3, wherein: the light beam detection point and the light beam emitter are respectively arranged at two sides of the central axis of the second container.
6. A liquid level detecting device according to claim 2, wherein: the second inner cavity is internally provided with a spring, two ends of the spring respectively support against the pressing plate and the second container barrel wall opposite to the pressing plate, and the spring is a compression spring.
7. The liquid level detecting device according to claim 6, wherein: a hole is arranged on the barrel wall of the second container which forms a second inner cavity and is opposite to the pressure plate,
the pressing plate limiting rod is further included, one end of the pressing plate limiting rod is fixedly connected with the pressing plate, the other end of the pressing plate limiting rod penetrates out of the hole, and the spring is sleeved outside the pressing plate limiting rod.
8. A liquid level detection apparatus according to any one of claims 1 to 7, wherein: the second pressing plate is arranged in the inner cavity of the first container, the diameter of the second pressing plate is matched with the inner diameter of the first container, the inner cavity of the first container is divided into two parts by the second pressing plate, one part of the inner cavity is communicated with the air bag, air is filled in the inner cavity of the part, and the other part of the inner cavity is filled with liquid and is communicated with the second container through a pipeline.
9. A washing machine characterized in that: the liquid level detecting device according to any one of claims 1 to 8, wherein the liquid level detecting device is fixed under a washing tub, and the air bag is in contact with water in the bottom of the washing tub.
10. A washing machine as claimed in claim 9, wherein: the bottom of the washing tub is provided with a hole, the first container is fixedly connected below the washing tub and seals the bottom of the hole, and the air bag is positioned in the hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210174827.9A CN114575111A (en) | 2022-02-24 | 2022-02-24 | Liquid level detection device and washing machine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210174827.9A CN114575111A (en) | 2022-02-24 | 2022-02-24 | Liquid level detection device and washing machine with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114575111A true CN114575111A (en) | 2022-06-03 |
Family
ID=81770179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210174827.9A Pending CN114575111A (en) | 2022-02-24 | 2022-02-24 | Liquid level detection device and washing machine with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114575111A (en) |
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2022
- 2022-02-24 CN CN202210174827.9A patent/CN114575111A/en active Pending
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