CN100389318C - Turbidity sensor with temperature detection for domestic electric appliances - Google Patents
Turbidity sensor with temperature detection for domestic electric appliances Download PDFInfo
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- CN100389318C CN100389318C CNB03150339XA CN03150339A CN100389318C CN 100389318 C CN100389318 C CN 100389318C CN B03150339X A CNB03150339X A CN B03150339XA CN 03150339 A CN03150339 A CN 03150339A CN 100389318 C CN100389318 C CN 100389318C
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Abstract
The present invention relates to a device for domestic electric appliances, particularly to a sensor for a washing machine and a dish washer. The present invention comprises a casing 2, a first optical element 12 and a second optical element 14, wherein the casing comprises a first casing finger 8 and a second casing finger 10; the first optical element 12 is arranged in the first casing finger 8; the second optical element 14 is arranged in the second casing finger 10; measurement beams transmitted and sent by the optical element 12 and the optical element 14 propagate between the casing finger 8 and the casing 10 outside the casing 2 for the measurement of the turbidity of cleaning media which partially surround the casing 2; the temperature sensor 18 is arranged in the second casing finger 10 for the temperature measurement of the cleansing media, and compared with the second optical element 14, the distance between the temperature sensor 18 and the base 4 is far.
Description
Technical field
The present invention relates generally to the sensor used for the household electrical appliance that use cleansing medium, it is right to be specifically related to be used for, for example, and the sensor that the turbidity of the cleansing medium that uses in washing machine and dish-washing machine and temperature detect.
Background of invention
The efficiency characteristics of a key of washing machine or dish-washing machine is the low consumption of energy and water, and this depends primarily on the dirty degree of the article that will clean.Because the dirty degree of the article that will clean is difficult to directly determine, just can't determine directly at all perhaps, thereby be well known that the so-called turbidity sensor of employing that turbidity by cleansing medium or dirty degree be the dirty degree of definite article that will clean indirectly.
The detection beam that the turbidity sensor general using is propagated in cleansing medium is determined cleansing medium respectively by turbidity sensor, for example cleans the water turbidity and the dirty degree of usefulness.According to the turbidity or the dirty degree of determined cleansing medium, can determine the current dirty degree of the article that will clean, and correspondingly control the operation of washing machine or dish-washing machine, realizing effective cleaning, and make the consumption of energy and water minimum.
And, the efficient of using washing machine or dish-washing machine to clean depends on the temperature of cleansing medium, this is because the temperature of cleansing medium, particularly, the temperature corresponding or determining to remove dirt particle from the article that will clean with the corresponding temperature course of given temperature course (temperature course) with giving fixed temperature.
For this purpose, adopted temperature sensor, these temperature sensors are arranged in the cleaning or cleaning area of each machine, and the temperature of cleansing medium is detected.And temperature sensor should guarantee that the temperature of cleansing medium is no more than the value for the article appointment that will clean, so that for example, can not damage clothing because temperature is too high in cleaning process.
Usually, washing machine or dish-washing machine are equipped with as the turbidity sensor of separate part and temperature sensor, and these turbidity sensors and temperature sensor can be realized measurement separately to cleansing medium at the different parts of household electrical appliance.It is invalid that this can cause operating, and particularly making up to optimize the occasion of machine operation the haze values of being determined by turbidity sensor with by the temperature that temperature sensor is determined.
In addition, be used for determining that the washing machine or the cleansing medium turbidity of dish-washing machine and the sensors known of temperature have bigger size, in machine, occupy some spaces separately.And, the location at these sensor places in machine, because the size of these sensors makes the static state and dynamic situation and actual clean regional different of cleansing medium, thereby these large-sized sensors make the measurement result distortion.
Another problem of this combination sensor is, the parts that are used for temperature detection are often because distortion takes place the temperature that sensor self produces and/or owing to the structure of sensor self makes the temperature variation of cleansing medium definite too slowly.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned existing solution.Particularly, the sensor that the present invention should provide a kind of confession such as washing machine or the such household electrical appliance of dish-washing machine to use, but the turbidity and the temperature of cleansing medium are determined in this sensor fast and reliable ground, have reduced size, and can be installed in the household electrical appliance simply.
Purpose of the present invention is achieved by a kind of sensor, and this sensor comprises housing, and it comprises from extended first and second housings of base portion and referring to; First optical element, it is arranged in first housing refers to; Second optical element, it is arranged in second housing refers to, wherein, propagates between the housing of measurement bundle housing outside that is sent and received by optical element refers to, is used for the turbidity that centers on the cleansing medium of housing is at least in part measured; And temperature sensor, it is arranged in second housing refers to, is used for the temperature of cleansing medium is measured, and compares with second optical element that it is farther apart from base portion.
For turbidity or the dirty degree of measuring cleansing medium, adopt detection beam, this detection beam refers to propagate into another housing by cleansing medium from a housing and refers between optical element.Derive the turbidity or the dirty degree of cleansing medium by detection beam by the reciprocation on the travel path of cleansing medium at it.
In second housing referred to, the temperature sensor that the temperature that is used for cleansing medium is detected was configured to make the distance between temperature sensor and the base portion bigger than the distance between second optical element and the base portion.Like this, what can realize is, compares with the part that comprises second optical element during second housing refers to, the part that has disposed temperature sensor during second housing refers to further extends in the cleansing medium.This can detect the temperature of cleansing medium faster and more reliably, and this is because for example, can be avoided being centered on by the heating part heating of sensor the part or the temperature sensor self of temperature sensor to a great extent.
Housing refers to can be designed so that its longitudinal axis with an angle that wherein, the distance between the free end that housing refers to can be greater than or less than the distance between the housing finger branch that is connected with base portion.In the case, housing refers to adopt the V-arrangement shape to extend from base portion, even for first and second optical elements of positioned opposite, also can obtain bigger measuring route, this positioned opposite can be measured the turbidity or the dirty degree of cleansing medium more accurately.
In order to obtain bigger measuring route, to it is also conceivable that first and second optical elements are staggered with respect to vertical axle box that housing refers to, thereby the diagonal angle between housing refers to of the measuring route between the optical element extend.This extension of measuring route is particularly suitable for first and second housings and refers to the situation of extending from base portion substantially parallelly, and this makes that for example, two housings arranging with V-arrangement refer to compare, between housing refers to apart from substantial constant.
And, can consider first and second optical elements are arranged on the axis with the rectilinear propagation paths merge of detection beam.Perhaps, can make first and second optical elements, so that detection beam is being detected by the special reciprocation on the travel path of cleansing medium (for example scattering effect) with respect to this axis misalignment.
In order to realize the more compact design of sensor, can consider to make first and second housings to refer to have different length, wherein, second housing that comprises temperature sensor refers to refer to than another first housing long.
Be arranged in the end that first housing refers at first optical element, under the situation at base portion position farthest, can realize the design of simplifying during promptly first housing refers to.
Preferably, when using the different housing of length to refer to, temperature sensor is configured to as far as possible that is: to be arranged in the end that second housing refers to away from base portion, and wherein, second optical element is arranged between temperature sensor and the base portion.
The different length that housing refers to helps to make the cleansing medium balance between housing refers in cleaning process, thereby cleansing medium turbidity or dirty kilsyth basalt that optical element is determined show actual turbidity or dirty degree.This can be supported by the design and the suitable installation site of sensor in household electrical appliance of base portion respectively.
Another advantage that the housing that length is different refers to is that temperature sensor can further enter into cleansing medium, and can not increase the size of sensor basically.
Preferably, temperature sensor is centered on by heat-conducting cream or heat-conducting glue, and this heat-conducting cream or heat-conducting glue can be filled the end that second housing comprises temperature sensor in referring to.Heat-conducting cream can make from the cleansing medium of outside by housing, and more precisely the material that refers to of second housing improves to the heat transmission of temperature sensor.And temperature sensor is not a rigidity/cast in housing securely like this, thereby can avoid because housing and the problem that causes around the different temperature coefficients of the material of temperature sensor.And, not hard brittle material around the material of temperature sensor, and compare with the rigidity casting substance, can realize better bonding with housing.
The temperature transfer of utilizing heat-conducting cream to be improved to temperature sensor can realize simpler meter of sensor, because only need inject heat-conducting cream or insert the end that second housing refers to.This can carry out before or after mounting temperature sensor.
And, can adopt the end that separating device refers to second housing and the sensor remainder of housings close to separate.Preferably, separating device can be realized the sealing of the second housing finger ends, is the sealing at heat-conducting cream at least.
According to the application of sensor, for example in washing machine or dish-washing machine, can be designed to prevent that towards, separating device heat-conducting cream from referring to flow out from second housing according to sensor.In addition, separating device also can make second housing refer to that the part that comprises temperature sensor realizes adiabatic or heat insulation with the part that comprises second optical element.
For optical element and temperature sensor are arranged in the housing, can consider to adopt the support member that is connected with these parts, in order to assemble sensor, for example connect by anchor clamps, snapper and/or viscosity, this support member is imported in the housing also install within it.And this support member can be realized optical element and/or temperature sensor location and the orientation in housing respectively.
Advantageously, separating device is provided by support member, and for example, by the planar structure on the support member, this planar structure is equivalent to a lid, has sealed the end that the second long housing refers to.
And, can consider optical element is connected with circuit board with temperature sensor, thereby adopt prefabrication system that the electric component according to sensor of the present invention is arranged within it.
The support member that is used for optical element and temperature sensor can be connected with circuit board, also can be used as an integral body.And, can provide support the function of part by circuit board self.The latter also is applicable to separating device, and for example, this separating device can provide by the surface that is substantially perpendicular to the extension of side circuit plate.
Preferably, circuit board comprises the pin connector that extends out from housing, so that sensor is connected with washing machine or dish-washing machine.
The space sealing that can housing be surrounded by lid is so that for example, prevent that the material of not expecting (that is: the cleansing medium of drift and dirt) from infiltering.And lid can form the pin connector that makes circuit board and extend to the outside by this lid.
And the shape of lid can be surrounded pin connector and be extended to outside part, is equivalent to plug body.Like this, lid can be used for realizing that the form fit with washing machine or dish-washing machine is connected, and wherein, the structure of the each several part of lid can be provided for fit structure that sensor is connected with washing machine or dish-washing machine, and/or snapper or mortise lock connection are provided.
Description of drawings
Following with reference to accompanying drawing, preferred embodiment is elaborated.In the accompanying drawings:
Fig. 1 and Fig. 2 are the constructed profiles according to sensor of the present invention.
Embodiment
Fig. 1 and Fig. 2 show the constructed profile for the sensor of household electrical appliance, particularly washing machine and use in dishwasher, and this sensor is used for the turbidity and the temperature of the cleansing medium of for example water, washing fluid, steam etc. and combination thereof are detected.
This sensor totally represents that with 1 it comprises housing 2, and housing 2 has the opening 4 that is centered on by base portion 6.And housing 2 comprises two ends 8 and 10, and it extends out from base portion, is equivalent to refer to.As can be seen from Figure 2, these two ends 8 and 10 (being designated hereinafter simply as finger) length of housing 2 is different, so that improve temperature detection, below is explained.
In order to detect turbidity, optical element 12 and 14 is arranged in the housing 2, be each positioned to refer in 8 and 10, and opposed mutually.The reciprocation of utilization cleansing medium of (being the outside of housing 2) between the detection beam of propagating between optical element 12 and 14 and finger 8 and 10 is determined the turbidity or the dirty degree of cleansing medium.According to the parameter of the cleansing medium of the turbidity of the expression cleansing medium that will detect, dirty degree etc., for example dirt particle, suspension, fabric residue etc., detection beam 16 can be optics and/or Acoustic detection bundle.For example, for on the one hand according to dirt particle, form turbidity/dirty degree of measuring cleansing medium respectively by foam on the other hand, when applying the optical detection bundle, can change its frequency, preferably alternately change, thereby generate and the effect corresponding parameter that causes different blended turbidity/dirty degree.
In order to generate detection beam 16, optical element 12 and 14 can comprise transmitter and receiver respectively.And, can make one in optical element 12 and 14 to comprise integrated transmitter and receiver, and another optical element comprises and is used to make emitted light beams to turn back to the device of another optical element.For simplicity, below supposition optical element 12 is used as transmitter, and optical element 14 is as receiver.
In the time of in sensor 1 is arranged in washing machine or dish-washing machine, refer to configuration temperature sensor 18 in 10 in the length that extends to further in the cleansing medium.Particularly, temperature sensor 18 is arranged in and refers to 10 outside, promptly relative with base portion 6 end.Owing to refer to that 10 extend in the cleansing medium further, thereby improve the response time of 18 pairs of cleansing medium temperature variation of temperature sensor.And because temperature sensor 18 is arranged to the remaining part away from sensor 1, thereby can carry out more exact temperature measurement, sensor 1 interior heat takes place and/or changes temperature survey is not had influence or influences very little.
And the end that inside is provided with the finger 10 of temperature sensor 18 is filled with heat-conducting cream or heat-conducting glue 20 at least in part, thereby makes temperature sensor, and its any temperature-sensitive components is centered on by heat-conducting cream 20 more specifically.Heat-conducting cream 20 can improve temperature sensor 18 and thermo-contact around the part of the finger 10 of temperature sensor 18, thereby also can improve the thermo-contact of temperature sensor 10 and cleansing medium.In addition, temperature sensor 18 also can refer to be configured to make temperature sensor 18 and any temperature-sensitive components thereof directly to contact with finger 10 respectively in 10.
In order to control, to operate and power, optical element 12 with 14 and temperature sensor 18 be connected with circuit board 22 by the electric wire (not shown).Circuit board 22 has pin connector 24 at it with referring to 8 and 10 relative ends, and this pin connector 24 extends out by opening 4.
For supporting optical component 12 and 14 and temperature sensor 18, the support member 28 that is installed on the circuit board 22 is provided, this support member 28 also can be used for circuit board 22 and optical element 12 and 14 and temperature sensor 18 be arranged in the housing 2.Particularly, support member 26 comprises surface 28, and this surface 28 is substantially perpendicular to circuit board 22 extends, and has sealed the end of the finger 10 at temperature sensor 18 places, is equivalent to a lid.This configuration of the end of finger 10 can make temperature sensor 18 and the remainder, the particularly heat generating components that generally is connected with circuit board 22 of sensor 1 realize the heat isolation.And surface 28 (below be also referred to as lid) can avoid heat-conducting cream 20 (in use) from referring to 10 end outflow.
According to the design of circuit board 22,, then can save support member 26 if the function of support member 26 is provided by circuit board 22.Particularly, in the case, circuit board 22 should comprise a kind of structure or surface, this structure or surface are equivalent to cover 28, (adopting favourable mode aspect heat transfer) separates the end of finger 10 and the remainder of the sensor 1 that is surrounded by housing 2, and when needed, adopt sealing means to make this end sealing.And lid 28 can be by having separately that the electric or electronic unit of shape provides on the circuit board 22.
The openend 4 of housing 2 adopts case lid 30 to seal basically.Case lid 30 can connect by buckle and/or snapper and be connected with housing 2, to realize the simple assembling of sensor 1.Be penetrated into the inside of sensor 1 for fear of cleansing medium, that is: the part that contacts with housing 2 of case lid 30 can adopt the seal element (not shown), particularly in the occasion that is connected the correct sealing that can not guarantee sensor 1 of case lid 30 and housing 2 self.
According to the optical element 12 and 14 that is adopted,, can consider that housing 2 is translucent in the part that disposes optical element 12 and 14 for detection beam 16 at least particularly according to the detection beam 16 that is adopted.Like this, for example, as shown in Figure 2, are occasions of optical detection bundle in detection beam 16, housing 2 can comprise translucent part or fenestra 34 and 36.If housing 2 whole employings are that translucent material is made for measuring bundle 16, for example adopt organic glass to make, then can obtain to simplify.
And, can consider, housing 2 comprises a kind of material at the receiving end of the finger 10 that disposes this temperature sensor 18 at least, and the thermal characteristics of this material makes can be by being arranged on temperature inside sensor 18, and the temperature of the cleansing medium of housing 2 outsides is carried out quick and correct detection.Advantageously, it is translucent for detection beam 16 that housing 2 adopts a kind of, and the heat conducting material that can be optimized to temperature sensor 18 is made.
Claims (34)
1. sensor of using for household electrical appliance, this sensor comprises:
Housing, it comprises from extended first and second housings of base portion and referring to;
First optical element, it is arranged in first housing refers to;
Second optical element, it is arranged in second housing refers to, wherein, propagates between the housing of measurement bundle housing outside that is sent and received by optical element refers to, is used for the turbidity that centers on the cleansing medium of housing is at least in part measured; And
Temperature sensor, it is arranged in second housing refers to, is used for the temperature of cleansing medium is measured, and compares with second optical element that it is farther apart from base portion.
2. sensor according to claim 1, wherein,
First and second housings refer to extend in parallel to each other basically.
3. sensor according to claim 1 and 2, wherein,
First housing refers to refer to than second housing short.
4. sensor according to claim 1, wherein,
First optical element is arranged in the end that first housing refers to.
5. sensor according to claim 1, wherein,
Second optical element be arranged in second housing refer in position between temperature sensor and the base portion, relative with first optical element.
6. sensor according to claim 1, wherein,
Temperature sensor (18) is centered on by heat-conducting cream (20) or heat-conducting glue (20), and this heat-conducting cream (20) or heat-conducting glue (20) have filled up the part that second housing refers to comprise in (10) temperature sensor (18) basically fully.
7. sensor according to claim 1, wherein,
Second housing refers to comprise in (10) part of temperature sensor (18) and separates by separating device (28) and the remainder that is surrounded by housing (2).
8. sensor according to claim 7, wherein,
Separating device (28) adopts sealing means to seal the part that second housing refers to comprise in (10) temperature sensor (18).
9. sensor according to claim 7, wherein,
Optical element (12,14) and temperature sensor (18) are arranged in the housing (2) by support member (26).
10. sensor according to claim 9, wherein,
Separating device (28) is one of support member (26) structure on plane basically.
11. sensor according to claim 9, wherein,
Optical element (12,14) and temperature sensor (18) are electrically connected to the circuit board (22) in the housing (2).
12. sensor according to claim 11, wherein,
Separating device (28) is one and is approximately perpendicular to the planar structure that circuit board (22) extends.
13. sensor according to claim 11, wherein,
Separating device (28) is to be provided by circuit board (22) or the parts on it.
14. sensor according to claim 11, wherein,
Support member (26) is connected with circuit board (22).
15. according to any one described sensor in the claim 11 to 14, wherein,
Circuit board (22) comprises from the extended pin connector of housing (2) (24), is used for being electrically connected with household electrical appliance.
16. sensor according to claim 15, wherein,
Housing (2) comprises with housing and refers to (8,10) relative case lid (30) that wherein, housing (2) and case lid (30) define sensor internal.
17. sensor according to claim 16, wherein,
The pin connector (24) of circuit board (22) extends out from sensor internal by case lid (30).
18. sensor according to claim 1, wherein said household electrical appliance are washing machine or dish-washing machine.
19. the housing of a sensor of using for household electrical appliance, this housing comprises:
Base portion (6);
First housing refers to (8), and it extends from base portion (6), is used to hold first optical element (12); And
Second housing refers to (10), it extends from base portion (6), be used to hold second optical element (14), wherein, first and second optical elements (12,14) be used for by at first and second optical elements (12,14) the measurement bundle of propagating between (16), the turbidity that centers on the cleansing medium of housing is at least in part measured, and be used to hold temperature sensor (18), measure with temperature, wherein cleansing medium, the part that refers to be used in (8) to hold second optical element (14) with second housing is compared, and the part that second housing refers to be used in (8) to hold temperature sensor (18) is positioned at apart from the position of the bigger distance of base portion (6).
20. housing according to claim 19, wherein,
First and second housings refer to (8,10) extension in parallel to each other basically.
21. housing according to claim 19, wherein,
First housing refers to that (8) refer to that than second housing (10) are short.
22. housing according to claim 19, wherein,
The part that is used to place first optical element (12) is positioned at the end that first housing refers to (8).
23. housing according to claim 19, wherein,
The part that second housing refers to be used in (10) to place second optical element (14) is positioned at second housing and refers to that (10) are used for the part of laying temperature sensor (18) and a position between the base portion (6), and the part that refers to place in (8) first optical elements (12) with first housing is relative.
24. housing according to claim 19, wherein,
Separating device (28) is provided, has separated with the remainder that surrounds by housing with the part that second housing is referred to laying temperature sensor (18) in (10).
25. housing according to claim 24, wherein,
Provide the support member (26) that will be arranged in the housing (2), to place optical element (12,14) and/or temperature sensor (18).
26. housing according to claim 25, wherein,
Separating device (28) is one of support member (26) structure on plane basically.
27. housing according to claim 25, wherein,
The circuit board (22) that will be arranged in the housing is provided, has been used to be electrically connected optical element (12,14) and/or temperature sensor (18).
28. housing according to claim 27, wherein,
Separating device (28) is one and is substantially perpendicular to the planar structure that circuit board (22) extends.
29. housing according to claim 27, wherein,
Separating device (28) by circuit board (22) or on it configured parts provide.
30. housing according to claim 27, wherein,
Support member (26) is connected with circuit board (22).
31. according to any one described housing in the claim 27 to 30, wherein,
Circuit board (22) comprises from the extended pin connector of housing (24), is used for being electrically connected with household electrical appliance.
32. housing according to claim 31 comprises:
Case lid (30) is configured to refer to that with housing (8,10) are relative that wherein, housing and case lid (30) define sensor internal.
33. housing according to claim 32, wherein,
The pin connector (24) of circuit board (22) extends out from sensor internal by case lid (30).
34. housing according to claim 19, wherein said household electrical appliance are washing machine or dish-washing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03150339XA CN100389318C (en) | 2003-07-28 | 2003-07-28 | Turbidity sensor with temperature detection for domestic electric appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03150339XA CN100389318C (en) | 2003-07-28 | 2003-07-28 | Turbidity sensor with temperature detection for domestic electric appliances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1576823A CN1576823A (en) | 2005-02-09 |
| CN100389318C true CN100389318C (en) | 2008-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB03150339XA Expired - Fee Related CN100389318C (en) | 2003-07-28 | 2003-07-28 | Turbidity sensor with temperature detection for domestic electric appliances |
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| Country | Link |
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| CN (1) | CN100389318C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007031480B4 (en) * | 2007-07-06 | 2009-05-14 | BSH Bosch und Siemens Hausgeräte GmbH | Sensor device and method for detecting the turbidity of wash liquor |
| KR101054435B1 (en) * | 2008-11-10 | 2011-08-05 | 엘지전자 주식회사 | How to control your dishwasher |
| IT1395641B1 (en) * | 2009-03-06 | 2012-10-16 | Illinois Tool Works | TURBIDITY SENSOR FOR A APPLIANCE |
| US9709505B2 (en) * | 2012-04-23 | 2017-07-18 | Samsung Electronics Co., Ltd. | Turbidity sensor and control method thereof |
| ITTO20120598A1 (en) * | 2012-07-06 | 2014-01-07 | Illinois Tool Works | HEATING DEVICE FOR HOUSEHOLD APPLIANCES WITH OPTICAL LIQUID LEVEL SENSOR |
| CN104729998A (en) * | 2015-02-27 | 2015-06-24 | 浙江省计量科学研究院 | Atmosphere visibility measurement device based on optical cavity ring down spectroscopy technology |
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|---|---|---|---|---|
| US4257708A (en) * | 1978-04-28 | 1981-03-24 | Tokyo Shibaura Denki Kabushiki Kaisha | Apparatus for measuring the degree of rinsing |
| US5446531A (en) * | 1994-05-20 | 1995-08-29 | Honeywell Inc. | Sensor platform for use in machines for washing articles |
| CN1145965A (en) * | 1995-06-12 | 1997-03-26 | 博施-西门子家用器具有限公司 | Method for making temp. compensation for measured value turbidity detector in automatic washing machine or bowl-washing machine |
| CN1298978A (en) * | 1999-12-07 | 2001-06-13 | 东芝株式会社 | Drum like washing machine |
| EP1245713A1 (en) * | 2000-04-29 | 2002-10-02 | Whirlpool Corporation | Sensor to measure the properties of a gaseous or liquid medium |
| US6509558B1 (en) * | 1998-07-15 | 2003-01-21 | Whirlpool Corporation | Optical sensor for measuring opaqueness of washing or rinsing liquid |
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2003
- 2003-07-28 CN CNB03150339XA patent/CN100389318C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4257708A (en) * | 1978-04-28 | 1981-03-24 | Tokyo Shibaura Denki Kabushiki Kaisha | Apparatus for measuring the degree of rinsing |
| US5446531A (en) * | 1994-05-20 | 1995-08-29 | Honeywell Inc. | Sensor platform for use in machines for washing articles |
| CN1145965A (en) * | 1995-06-12 | 1997-03-26 | 博施-西门子家用器具有限公司 | Method for making temp. compensation for measured value turbidity detector in automatic washing machine or bowl-washing machine |
| US6509558B1 (en) * | 1998-07-15 | 2003-01-21 | Whirlpool Corporation | Optical sensor for measuring opaqueness of washing or rinsing liquid |
| CN1298978A (en) * | 1999-12-07 | 2001-06-13 | 东芝株式会社 | Drum like washing machine |
| EP1245713A1 (en) * | 2000-04-29 | 2002-10-02 | Whirlpool Corporation | Sensor to measure the properties of a gaseous or liquid medium |
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| CN1576823A (en) | 2005-02-09 |
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