CN2267759Y - Electronic water-level sensor for dish-washing machine - Google Patents
Electronic water-level sensor for dish-washing machine Download PDFInfo
- Publication number
- CN2267759Y CN2267759Y CN 96242181 CN96242181U CN2267759Y CN 2267759 Y CN2267759 Y CN 2267759Y CN 96242181 CN96242181 CN 96242181 CN 96242181 U CN96242181 U CN 96242181U CN 2267759 Y CN2267759 Y CN 2267759Y
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- CN
- China
- Prior art keywords
- electrode
- water pipe
- dish
- level sensor
- washing machine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an electronic water level sensor for a dishwasher, which is composed of a detecting probe head and a detecting circuit. The utility model is characterized in that the detecting probe head is arranged in a vertical water pipe which is communicated with a detected container; a common electrode and a measuring electrode are arranged, a pair of electrodes are composed of the common electrode and the measuring electrode, and the measuring electrode is arranged according to water level; the electrodes adopts wire electrodes which are isolated on the center of the cross section of the water pipe; the wire electrodes are the front section of an electrode bar, the back section of the electrode bar is sealed in an insulation state by a plastic sleeve and is fixed through penetrating through the lateral wall of the water pipe, and the tail end of the electrode bar is connected with an output conducting wire. The utility model has the advantages of simple structure, reliable performance, and perfect function.
Description
The utility model relates to the level sensor that is used for dish-washing machine.
For level sensor, adopting electrode bar to measure water resistance is a kind of simple water level measurement method, but, because when water level descends, between electrode and the pipe inner wall, the water droplet or the moisture film that form between electrode and the electrode make resistance measurement can not accurately reflect SEA LEVEL VARIATION, and because factor affecting such as the electro-chemical reaction of metal electrode and aqueous medium, water temperature variation, change of water quality, uniformity, stability that water resistance is measured are also relatively poor, therefore, this so far measuring method is not seen in dish-washing machine and is used.
Dish-washing machine of the prior art is then to adopt the vapour-pressure type level sensor.The vapour-pressure type level sensor is applied to that mainly there are the following problems in the dish-washing machine:
1, each sensor all needs to carry out the water level adjustment in the production;
2, variations in temperature will cause that the sensor internal gas pressure changes, thereby causes that the level measuring error is bigger, and this problem is particularly outstanding in the dish-washing machine with heated scrub program;
3, reliability is lower in the use, fault rate is higher.
The purpose of this utility model is to avoid existing weak point in the above-mentioned prior art, and the dish-washing machine electronics level sensor of a kind of simple in structure, dependable performance, perfect in shape and function is provided.
The purpose of this utility model is achieved through the following technical solutions:
The utility model is made of detection probe and testing circuit, its architectural feature is, described detection probe is in the vertical water pipe that is communicated with tested container, formation is set to the public electrode of electrode and the measurement electrode that is provided with according to water level, described each measurement electrode adopts arc to stand on the line electrode of water pipe Section Central, and described line electrode is the electrode bar leading portion, and the electrode bar back segment is by the garment bag insulated envelope, and pass the water pipe sidewall and fix, its tail end is connected with output lead.
The utility model is owing to adopt arc to stand on the line electrode structure of water pipe Section Central, thereby electrode and pipe inner wall separate fully, has avoided electrode and pipe inner wall because of adhering to water droplet or moisture film misleads; The measurement electrode and the public electrode that constitute electrode in the utility model do not adopt positional structure one to one, but the public electrode of each measurement electrode is set independently in water pipe bottom, thereby also avoided between each measurement electrode and the public electrode because of leaning on too closely, adhering to water droplet or moisture film easily causes and misleads, this shows, compared with the prior art, simple in structure, the dependable performance of the utility model.In addition, the utility model can set gradually from top to bottom in water pipe as required and include warning electrode, washing electrode, heating electrode, and the measurement electrode of emptying electrode, makes its perfect in shape and function.
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model testing circuit schematic diagram.
By the following examples, in conjunction with the accompanying drawings, the utility model is further described.
Embodiment:
Referring to Fig. 1, detection probe is in vertical water pipe 1, measurement electrode 2,3,4,5 is set and constitutes public electrode 6 electrode with measurement electrode, wherein, measurement electrode comprises warning electrode 2, washing electrode 3, heating electrode 4, and emptying electrode 5, each electrode sets gradually in water pipe 1 from top to bottom, and public electrode 6 is positioned at water pipe 1 bottom.Water pipe 1 is communicated with tested container.As described in Figure 1, each electrode adopts arc to stand on the line electrode of water pipe 1 Section Central, and line electrode is the electrode bar leading portion, and the electrode bar back segment is by garment bag 7 insulated envelope, and passes the water pipe sidewall and fix, and its tail end is connected with output lead.
As shown in Figure 2, the water level detection circuit circuit adopts the comparison circuit that is made of respectively comparator exclusive disjunction amplifier U1, U2, U3 and U4, and each is connected to corresponding comparator signal input to electrode, and exports as signal with the output of each comparator.In the present embodiment, the direct output alarm water level of comparator U1, comparator U2, U3 and U4 are exported water level, heating water level and emptying water level respectively.As shown in Figure 2, R5, R6 constitute the threshold value of comparator.Can ignore of the influence of the factor such as variable in distance, water temperature variation, electro-chemical reaction of electrode fully to the water resistance measured value by the threshold design of comparison circuit.
Claims (3)
1, a kind of dish-washing machine electronics level sensor, constitute by detection probe and testing circuit, it is characterized in that, described detection probe is in the vertical water pipe (1) that is communicated with tested container, formation is set to the public electrode (6) of electrode and the measurement electrode (2,3,4,5) that is provided with according to water level, described each measurement electrode adopts arc to stand on the line electrode of water pipe (1) Section Central, described line electrode is the electrode bar leading portion, the electrode bar back segment is by garment bag (7) insulated envelope, and pass the water pipe sidewall and fix, its tail end is connected with output lead.
2, dish-washing machine electronics level sensor according to claim 1, it is characterized in that described measurement electrode comprises warning electrode (2), washing electrode (3), heating electrode (4), and emptying electrode (5), each electrode sets gradually in water pipe from top to bottom, and public electrode (6) is positioned at water pipe (1) bottom.
3, dish-washing machine electronics level sensor according to claim 2, it is characterized in that described testing circuit adopts the comparison circuit that is made of respectively comparator exclusive disjunction amplifier U1, U2, U3 and U4, each is connected to corresponding comparator signal input to electrode, and with the output of each comparator as signal output part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96242181 CN2267759Y (en) | 1996-10-12 | 1996-10-12 | Electronic water-level sensor for dish-washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96242181 CN2267759Y (en) | 1996-10-12 | 1996-10-12 | Electronic water-level sensor for dish-washing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2267759Y true CN2267759Y (en) | 1997-11-19 |
Family
ID=33916374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96242181 Expired - Fee Related CN2267759Y (en) | 1996-10-12 | 1996-10-12 | Electronic water-level sensor for dish-washing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2267759Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251379A (en) * | 2011-03-21 | 2011-11-23 | 海尔集团公司 | Water-level measuring device for small/mini buoyancy washing machines and application method thereof |
| CN106073677A (en) * | 2016-07-29 | 2016-11-09 | 芜湖广盈实业有限公司 | A kind of dish-washing machine level control switch for water |
| CN109415868A (en) * | 2016-07-05 | 2019-03-01 | 艺康美国股份有限公司 | Liquid product exhausts alarm system and method |
| CN110806246A (en) * | 2019-11-15 | 2020-02-18 | 深圳朗特智能控制股份有限公司 | Water level monitoring device, water level monitoring method and system thereof, and storage medium |
-
1996
- 1996-10-12 CN CN 96242181 patent/CN2267759Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251379A (en) * | 2011-03-21 | 2011-11-23 | 海尔集团公司 | Water-level measuring device for small/mini buoyancy washing machines and application method thereof |
| CN102251379B (en) * | 2011-03-21 | 2016-06-01 | 海尔集团公司 | The level measurement device of a kind of small/micro buoyancy washing machine and using method |
| CN109415868A (en) * | 2016-07-05 | 2019-03-01 | 艺康美国股份有限公司 | Liquid product exhausts alarm system and method |
| CN109415868B (en) * | 2016-07-05 | 2021-09-24 | 艺康美国股份有限公司 | Liquid product exhaustion alarm system and method |
| CN106073677A (en) * | 2016-07-29 | 2016-11-09 | 芜湖广盈实业有限公司 | A kind of dish-washing machine level control switch for water |
| CN110806246A (en) * | 2019-11-15 | 2020-02-18 | 深圳朗特智能控制股份有限公司 | Water level monitoring device, water level monitoring method and system thereof, and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |