CN210321891U - Water tank with water level detection function - Google Patents
Water tank with water level detection function Download PDFInfo
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- CN210321891U CN210321891U CN201921131935.8U CN201921131935U CN210321891U CN 210321891 U CN210321891 U CN 210321891U CN 201921131935 U CN201921131935 U CN 201921131935U CN 210321891 U CN210321891 U CN 210321891U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 408
- 238000001514 detection method Methods 0.000 title claims abstract description 124
- 239000003990 capacitor Substances 0.000 description 4
- 238000010411 cooking Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 238000013507 mapping Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a water tank with water level detection function, which comprises a water tank component, a water level detection circuit board and a controller; the water level detection circuit board is arranged on the outer wall of the water tank assembly, an isolated water level detection IC chip used for detecting the capacitance of the water tank assembly is arranged on the water level detection circuit board, the isolated water level detection IC chip is electrically connected with the controller, and the controller is used for receiving the capacitance value sent by the isolated water level detection IC chip, calculating and judging the water level of the water tank assembly. The utility model discloses a water tank with water level detection function can realize separating the effect of empty detection water level height, and electric capacity testing result is accurate.
Description
Technical Field
The utility model belongs to the technical field of the water level detection of water tank, concretely relates to water tank with water level detection function.
Background
When the existing water tank detects the water level, two modes are generally adopted: one is by magnetic induction proximity switches and the other is by capacitance detection.
When the magnetic induction proximity switch is used for detecting the water level of the water level, a floater wrapped with a magnetic material needs to be placed in the water tank, and bacteria are easy to breed because the floater needs to contact water for a long time; in addition, to being applied to the water tank among the steam cooking equipment, mostly be portable, need frequent taking out to add water, then put back steam cooking equipment's water tank seat in, at the in-process of taking out and putting back, the dislocation takes place easily with magnetic induction proximity switch to lead to the water level to detect the failure.
In a water tank for detecting water level by using a capacitor, a metal sheet is generally arranged on the inner side wall of the water tank and used for detecting the change of the capacitor in the water tank so as to judge the height of the water level in the water tank; and the metal sheet may have scale on the surface thereof with the increase of the use time, thereby affecting the accuracy of water level detection.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that a floater existing in the existing water level detection of a water tank is easy to breed bacteria or inaccurate in detection, the water tank with the water level detection function is provided.
A water tank with a water level detection function comprises a water tank component, a water level detection circuit board and a controller;
the water level detection circuit board is arranged on the outer wall of the water tank assembly, an isolated water level detection IC chip used for detecting the capacitance of the water tank assembly is arranged on the water level detection circuit board, the isolated water level detection IC chip is electrically connected with the controller, and the controller is used for receiving the capacitance value sent by the isolated water level detection IC chip, calculating and judging the water level of the water tank assembly.
Preferably, the water level detection circuit board comprises at least two electrode plates and is arranged at different water level heights of the water tank assembly.
Preferably, each electrode plate is connected with a capacitance induction detection channel of the separated water level detection IC chip.
Preferably, the water tank assembly comprises a water tank seat and a water tank body, and the water tank body is arranged in the water tank seat and movably connected with the water tank seat.
Preferably, the water tank body comprises a water tank shell, a water tank cover and a water outlet pipe; the water tank cover is provided with a water inlet, the water tank cover covers the water tank shell, one end of the water outlet pipe is arranged in the water tank shell, and the other end of the water outlet pipe is arranged outside the water tank shell and is connected with a connecting pipe arranged on the water tank seat.
Preferably, the water tank body further comprises a water baffle, and the water baffle is arranged in the water tank shell and is perpendicular to the water tank cover.
Preferably, the water level detection circuit board is disposed on an outer side wall or an inner side wall of the water tank seat.
Preferably, the water level detection circuit board is arranged on the outer side wall of the water tank body.
Preferably, the water level detection device further comprises a pressing plate for fixing the water level detection circuit board, the pressing plate is arranged on the side wall of the water tank seat or the side wall of the water tank body, and the water level detection circuit board is positioned between the pressing plate and the side wall of the water tank seat or the side wall of the water tank body.
Compared with the prior art, the utility model discloses a water tank with water level detection function adopts above-mentioned scheme's beneficial effect to do:
the water level detection circuit board is arranged on the outer wall of the water tank assembly, the water level detection circuit board is provided with an empty water level detection IC chip for detecting the capacitance of the water tank assembly, the empty water level detection IC chip is electrically connected with the controller, and the controller is used for receiving the capacitance value sent by the empty water level detection IC chip, calculating and judging to obtain the water level of the water tank assembly; that is to say, the utility model discloses an empty water level detection IC chip for detecting water tank set spare electric capacity sets up outside the water tank set spare, can realize the water level of empty detection water tank set spare, and because empty water level detection IC chip does not contact with water again, just avoid incrustation scale to deposit on empty water level detection IC chip, and the inaccurate problem of water level detection appears; furthermore, the utility model discloses a convenient to operate is nimble for water level detection circuit board.
Drawings
Fig. 1 is a perspective view of a water tank with a water level detection function according to an embodiment of the present invention;
fig. 2 is an exploded view of a water tank assembly of a water tank with a water level detection function according to an embodiment of the present invention;
FIG. 3 is an exploded view of FIG. 1;
fig. 4 is a flowchart of a water level detection method for a water tank with a water level detection function according to an embodiment of the present invention;
FIG. 5 is a diagram showing the positional relationship between electrode plates and a water level detection circuit board;
in the figure: 1. a water tank assembly; 2. a water level detection circuit board; 3. pressing a plate; 11. a water tank base; 12. a water tank body; 111. a connecting pipe; 121. a water tank housing; 122. a water tank cover; 123. a water outlet pipe; 124. a water inlet; 125. a water baffle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present embodiment provides a water tank with water level detection function, as shown in fig. 1-3, comprising a water tank assembly 1, a water level detection circuit board 2, and a controller;
the water level detection circuit board 2 is arranged on the outer wall of the water tank assembly 1, an isolated water level detection IC chip for detecting the capacitance of the water tank assembly 1 is arranged on the water level detection circuit board 2, the isolated water level detection IC chip is electrically connected with the controller, and the controller is used for receiving the capacitance value sent by the isolated water level detection IC chip, calculating and judging to obtain the water level of the water tank assembly 1;
because the water level detection circuit board 2 is arranged on the outer wall of the water tank assembly 1, the water level detection circuit board 2 is provided with an isolated water level detection IC chip for detecting the capacitance of the water tank assembly 1, the isolated water level detection IC chip is electrically connected with the controller, and the controller is used for receiving the capacitance value sent by the isolated water level detection IC chip, and calculating and judging to obtain the water level of the water tank assembly 1; that is to say, the empty water level detection IC chip for detecting the capacitance of the water tank assembly 1 of the present embodiment is disposed outside the water tank assembly 1, so that the water level of the water tank assembly 1 can be detected in an empty manner, and the problem of inaccurate water level detection due to the deposition of scale on the empty water level detection IC chip is avoided because the empty water level detection IC chip is not in contact with water; in addition, the water level detection circuit board 2 of the present embodiment is convenient and flexible to mount.
In a specific embodiment, the water level detection circuit board 2 comprises at least two electrode plates and is arranged at different water level heights of the water tank assembly 1; in the embodiment, the electrode plate is also arranged outside the water tank assembly 1, and a capacitor is formed between the electrode plate and the ground and used for detecting the water level of the water tank assembly 1 in an isolated manner;
because only one electrode plate is arranged, whether water exists in the water tank assembly 1 can be detected, and the water level in the water tank assembly 1 cannot be accurately detected;
in the present embodiment, the electrode sheet may be any material capable of conducting electricity, such as copper foil.
In the present embodiment, the water level detection circuit board 2 includes four electrode pads, and is disposed at different heights of the water tank assembly 1;
the water level detection circuit board 2 in this embodiment may be a printed circuit board, such as a PCB; the empty water level detection IC chip in this embodiment may be a dedicated IC with four capacitive sensing detection channels, such as SCW 8916B.
In a specific embodiment, each electrode plate is connected with a capacitance sensing detection channel of the separated water level detection IC chip, so as to detect a capacitance value corresponding to each electrode plate.
In the specific embodiment, the water tank assembly 1 comprises a water tank base 11 and a water tank body 12, wherein the water tank body 12 is arranged in the water tank base 11 and is movably connected with the water tank base 11; the purpose is to facilitate the use of the water tank assembly 1 of the present embodiment in steam cooking equipment, the water tank of the existing steam cooking equipment is usually in the water tank seat, and the purpose is to facilitate the extraction and the addition of water, so the water tank assembly of the present embodiment comprises a water tank seat 11 and a water tank body 12;
for example, in the present embodiment, the tank body 12 can be pulled out from the tank base 11 to be filled with water, and after the water is filled, the tank body 12 can be pushed into the tank base 11 again.
In a specific embodiment, the tank body 12 includes a tank housing 121, a tank cover 122 and an outlet pipe 123; the water tank cover 122 is provided with a water inlet 124, the water tank cover 122 is covered on the water tank shell 121, one end of the water outlet pipe 123 is arranged in the water tank shell 121, and the other end is arranged outside the water tank shell 121 and is connected with the connecting pipe 111 arranged on the water tank base 11;
water is added into the water tank shell 121 from the water inlet 124, and the water in the water tank shell 121 flows out of the water tank shell 121 from the water delivery pipe 123 and flows out of the water tank assembly 1 through the connecting pipe 111; the water tank cover 122 can also be opened to directly add water to the water tank shell 121, and the water adding speed is high.
In an exemplary embodiment, the tank body 12 further includes a water guard 125, the water guard 125 is disposed in the tank case 121 and is disposed perpendicular to the tank cover 122 in order to prevent water in the tank case 121 from splashing on the tank cover 122 when the tank body 12 is drawn out of or pushed into the tank base 11; in addition, when the water tank cover 122 is not covered on the water tank shell 121, the water in the water tank shell 121 is prevented from splashing out of the water tank shell 121, so that the waste of water is avoided; avoiding contamination of the water tank base 11.
In a specific embodiment, the water level detection circuit board 2 may be disposed on an outer sidewall or an inner sidewall of the water tank base 11; the water level detection circuit board 2 can also be arranged on the outer side wall of the water tank body 12, and can realize the detection of the water level in the water tank body 12.
In the specific embodiment, further include the clamp plate 3 that is used for fixed water level detection circuit board 2, clamp plate 3 sets up on the lateral wall of water tank seat 11 or the lateral wall of water tank body 12, and water level detection circuit board 2 is located between clamp plate 3 and the lateral wall of water tank seat 11 or the lateral wall of water tank body 12, clamp plate 3 sets up on water level detection circuit board 2, the purpose is in order to prevent that water level detection circuit board 2 from dropping from the lateral wall of water tank assembly 1, and ensure that the electrode slice is next to the lateral wall of water tank assembly 1, improve the accuracy that electric capacity detected.
In this embodiment, the pressing plate 3 is disposed on the outer side wall of the water tank seat 11, the water level detection circuit board 2 is also disposed on the outer side wall of the water tank seat 11, and the water level detection circuit board 2 is disposed between the pressing plate 3 and the outer side wall of the water tank seat 11, so that the water level detection circuit board 2 is prevented from falling off from the outer side wall of the water tank seat 11, the outer side wall of the electrode plate close to the water tank seat 11 is ensured, and the accuracy of capacitance detection is improved.
The working process is as follows:
the water level detection circuit board 2 is fixedly arranged on the outer side wall of the water tank seat 11, four electrode plates on the water level detection circuit board 2 are arranged at different water level heights of the water tank seat 11, and meanwhile, in order to ensure that the electrode plates are tightly attached to the water tank seat 11, the pressing plate 3 is fixedly arranged on the water level detection circuit board 2; the empty water level detection IC chip is electrically connected with the controller, so that the water level in the water tank body 12 can be detected.
As shown in fig. 4, the water level detection method of this embodiment includes the following steps:
s1, detecting the capacitance value corresponding to each electrode plate by the aid of the separated water level detection IC chip, and sending detection results to the controller;
s2, the controller judges the capacitance C of the electrode plate close to the bottom of the water tank body 121Whether or not: c1＞C0In which C is0Is the capacitance value of the water tank body 12 in the water-free state; if not, the water tank body 12 is in a water-free state; if so, the water tank body 12 is in a water state;
s3, the controller judges whether the capacitance value of each electrode slice is within the capacitance threshold range within the time threshold, if so, the water tank body 12 is in a full water state; if not, recording that the capacitance values are all larger than C0The number of electrode plates is larger than C according to the capacitance value0The number of the electrode plates and the water level height of the water tank body 12 are mapped to obtain the water level height of the water tank body 12.
The empty water level detection IC chip detects the capacitance value corresponding to each electrode plate and sends the detection result to the controller, and the controller judges the capacitance value C of the electrode plate close to the bottom of the water tank body 121Whether or not: c1＞C0To determine whether the tank body 12 is in a water-free state; if not, the water tank body 12 is in a water-free state; if so, the water tank body 12 is in a water state; when the water tank body 12 is in a water-filled state, the controller judges whether the water tank body 12 is in a full water state by judging whether the capacitance value of each electrode plate is in the capacitance threshold range within a time threshold; if so, the water tank body 12 is in a full water state; if not, the water tank body 12 is in a state of water but not full, and the recording capacitance values are all larger than C0The number of electrode plates is larger than C according to the capacitance value0The number of the electrode plates and the water level height of the water tank body 12 are in a mapping relation, and the water level height of the water tank body 12 is obtained; in the whole water level detection process, the capacitor is formed between the electrode plate and the ground, and the electrode plate is connected with the capacitance sensing detection channel of the isolated water level detection IC chip, so that isolated detection of the water level of the water tank assembly can be realized; furthermore, because again the utility model discloses an avoid separating among the detection method water level and detect IC chip and electrode slice direct contact water, so can effectually avoid the incrustation scale to deposit on separating water level and detecting IC chip and electrode slice, improve the accuracy that electric capacity detected.
The time threshold in S3 is a time period pre-stored in the controller, for example, 1S to 3S, so as to avoid erroneous determination; because if the water tank is actually in a state that water is present but the water tank is not full, but because the water tank shakes, the capacitance value of each electrode plate may reach within the capacitance threshold value range at a certain moment, if the controller judges that the water tank at this moment is in a full water state, the judgment is actually a misjudgment, and the time threshold value is specified in the embodiment, the misjudgment can be avoided.
The capacitance threshold range is also a capacitance range pre-stored in the controller, and is an up-and-down floating range of the capacitance value of the electrode plate when the water tank is in a full water state, because even if the water tank is in the full water state, the capacitance value of each electrode plate can have slight difference or change due to the influence of environment and the like, and the water tank is determined to be in the full water state as long as the capacitance value of each electrode plate is in the capacitance threshold range.
In specific embodiments, all according to the capacitance valueGreater than C0The number of electrode pieces and the mapping relation of the water level height of the water tank body 12 include:
the water level height H of the water tank body 12 satisfies: h ═ H1+n×h2+(n-1)h3Wherein h is1Is the distance h between the lower edge of the electrode plate close to the bottom of the water tank body 12 and the bottom of the water tank body 122Height of each electrode sheet, h3Is the distance between two electrode plates, and n is the capacitance value larger than C0The number of the electrode pieces; therefore, the water level height of the water tank body 12 can be accurately judged.
The specific process of the water level detection method of the embodiment is as follows:
the water level detection circuit board 2 comprises 4 electrode plates with the same height, and is arranged at different water level heights of the water tank body 1, as shown in fig. 5, the water level detection circuit board is sequentially recorded as a No. 1 electrode plate, a No. 2 electrode plate, a No. 3 electrode plate, a No. 4 electrode plate from bottom to top, and the height h of each electrode plate25mm, the distance h between two adjacent electrode plates32mm, the distance h between the lower edge of the No. 1 electrode plate and the bottom of the water tank body 121＝1mm；
The isolated water level detection IC chip detects the capacitance value corresponding to each electrode plate, and the capacitance value corresponding to the No. 1 electrode plate is C1And the capacitance value corresponding to the No. 2 electrode plate is C2And the capacitance value corresponding to the No. 3 electrode plate is C3And the capacitance value corresponding to the No. 4 electrode plate is C4And C is1、C2、C3And C4All the data are sent to a controller;
the controller judges the capacitance C of the No. 1 electrode plate1Whether or not: c1＞C0In which C is0Is the capacitance value of the water tank body 12 in the water-free state; if not, the water tank body 12 is in a water-free state; if so, the water tank body 12 is in a water state;
the controller judges the capacitance (C) of each electrode plate within the time threshold value (1 s-3 s)1、C2、C3And C4) Whether the capacitance values are all within the range of the capacitance threshold value, if so, the water tank body 12 is in a full water state; if not, recordingThe capacitance values are all larger than C0The number of electrode plates is larger than C according to the capacitance value0The number of the electrode plates and the water level height of the water tank body 12 are in a mapping relation, and the water level height of the water tank body 12 is obtained; the mapping relation is as follows: the water level height H of the water tank body 12 satisfies: h ═ H1+n×h2+(n-1)h3Wherein h is1Is the distance h between the lower edge of the electrode plate close to the bottom of the water tank body 12 and the bottom of the water tank body 122Height of each electrode sheet, h3Is the distance between two electrode plates, and n is the capacitance value larger than C0The detected water level height H in the water tank body 12 is H1+n×h2+(n-1)×h3Since 1mm +3 × 5mm + (2-1) × 2mm is 18mm, the height of the water level in the tank body 12 is 18 mm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A water tank with a water level detection function is characterized by comprising a water tank component (1), a water level detection circuit board (2) and a controller;
the water level detection circuit board (2) sets up on the outer wall of water tank subassembly (1), be provided with on water level detection circuit board (2) and be used for detecting the empty water level detection IC chip that separates of water tank subassembly (1) electric capacity, separate empty water level detection IC chip with controller electric connection, the controller is used for receiving the capacitance value that separates empty water level detection IC chip and send to calculate and judge and reachs the water level of water tank subassembly (1).
2. The water tank with the water level detection function according to claim 1, wherein the water level detection circuit board (2) comprises at least two electrode pads and is disposed at different water level heights of the water tank assembly (1).
3. The water tank with the water level detection function according to claim 2, wherein each of the electrode pads is connected to a capacitive sensing detection channel of the empty water level detection IC chip.
4. The water tank with the water level detection function as claimed in claim 1, wherein the water tank assembly (1) comprises a water tank base (11) and a water tank body (12), and the water tank body (12) is arranged in the water tank base (11) and movably connected with the water tank base (11).
5. The water tank having a water level detecting function according to claim 4, wherein the water tank body (12) includes a tank case (121), a tank cover (122), and an outlet pipe (123); the water tank is characterized in that a water inlet (124) is formed in the water tank cover (122), the water tank cover (122) covers the water tank shell (121), one end of the water outlet pipe (123) is arranged in the water tank shell (121), and the other end of the water outlet pipe is arranged outside the water tank shell (121) and is connected with a connecting pipe (111) arranged on the water tank seat (11).
6. The water tank having a water level detecting function according to claim 5, wherein the water tank body (12) further comprises a water guard (125), the water guard (125) being provided in the water tank case (121) and being arranged perpendicular to the water tank cover (122).
7. The water tank with water level detection function according to any one of claims 4 to 6, wherein the water level detection circuit board (2) is disposed at an outer sidewall or an inner sidewall of the water tank holder (11).
8. The water tank with water level detection function according to any one of claims 4 to 6, wherein the water level detection circuit board (2) is provided at an outer sidewall of the water tank body (12).
9. The water tank with the water level detection function according to any one of claims 4 to 6, further comprising a pressing plate (3) for fixing the water level detection circuit board (2), wherein the pressing plate (3) is disposed on a side wall of the water tank base (11) or a side wall of the water tank body (12), and the water level detection circuit board (2) is located between the pressing plate (3) and the side wall of the water tank base (11) or the side wall of the water tank body (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921131935.8U CN210321891U (en) | 2019-07-18 | 2019-07-18 | Water tank with water level detection function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921131935.8U CN210321891U (en) | 2019-07-18 | 2019-07-18 | Water tank with water level detection function |
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| CN210321891U true CN210321891U (en) | 2020-04-14 |
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| CN201921131935.8U Active CN210321891U (en) | 2019-07-18 | 2019-07-18 | Water tank with water level detection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332975A (en) * | 2019-07-18 | 2019-10-15 | 华帝股份有限公司 | Water tank with water level detection function and water level detection method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332975A (en) * | 2019-07-18 | 2019-10-15 | 华帝股份有限公司 | Water tank with water level detection function and water level detection method thereof |
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