CN111676647A - Washing machine - Google Patents
Washing machine Download PDFInfo
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- CN111676647A CN111676647A CN201910824570.5A CN201910824570A CN111676647A CN 111676647 A CN111676647 A CN 111676647A CN 201910824570 A CN201910824570 A CN 201910824570A CN 111676647 A CN111676647 A CN 111676647A
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- water
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- heater
- tub
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- 238000005406 washing Methods 0.000 title claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 180
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 239000008236 heating water Substances 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 23
- 239000003599 detergent Substances 0.000 description 22
- 238000001035 drying Methods 0.000 description 13
- 239000012530 fluid Substances 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010981 drying operation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
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- Control Of Washing Machine And Dryer (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
The invention provides a washing machine capable of properly preventing abnormal heating of a water heating part even if water level detection does not operate correctly. The washing machine includes: an outer tub (15) for storing water; a drum (14) rotatably supported in the tub (15) and capable of storing laundry; a water supply unit (10) for supplying water into the outer tub (15); a heater (29) for heating the water supplied to the outer tub (15); a water level sensor (25) for detecting the water level in the outer tub (15); a conductivity sensor (28) that measures the conductivity of the water in the outer tub (15); and a control device (27) that controls the water level sensor (25) and the conductivity sensor (28), the control device (27) controlling the heater (29) to start heating based on a detection result of the water level sensor (25) and a measurement result of the conductivity sensor (28).
Description
Technical Field
The present invention relates to a washing machine for washing laundry and the like.
Background
Patent document 1 describes the following technique: "in the washing machine that sprays warm water into the washing and dewatering barrel in the form of mist, prevent the abnormal heating of the heater when the water supply is stopped from the outside or the water supply is insufficient. "
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2006-51293
Disclosure of Invention
Technical problem to be solved by the invention
However, in patent document 1, when water stored in a certain space is heated by a heater, since it is determined by a water level sensor whether or not water in an amount that the heater does not burn empty exists in the space and it is determined whether or not the amount of water is a cause of abnormal heating of the heater, such determination is no longer appropriate when, for example, the water level sensor has failed or when the water level sensor cannot correctly transmit a water level detection signal (for example, an error in a water level read value due to the presence of foreign matter), the heater is heated in an empty state, and there is a possibility of fire.
Accordingly, an object of the present invention is to provide a washing machine capable of appropriately preventing abnormal heating of a water heating portion even when a water level detection portion is not operated correctly.
Means for solving the problems
In order to solve the above-described problems, for example, a washing machine according to the present invention includes: an outer tub for storing water; an inner tub rotatably supported in the outer tub and capable of receiving laundry; a water supply part for supplying water to the outer barrel; a water heating part heating water supplied into the tub; a water level detecting part for detecting the water level in the outer barrel; a conductivity measuring part for measuring the conductivity of the water in the outer barrel; and a control part controlling the water level detection part and the conductivity measurement part, the control part controlling the heating start of the heating part based on a detection result of the water level detection part and a measurement result of the conductivity measurement part.
Effects of the invention
According to the present invention, it is possible to provide a washing machine capable of appropriately preventing abnormal heating of a water heating portion even when a water level detection portion is not operated properly.
Drawings
Fig. 1 is an external perspective view showing a drum type washing and drying machine according to the present invention.
Fig. 2 is a side view showing an internal structure of a longitudinal section of the drum type washing and drying machine of fig. 1.
Fig. 3 is a diagram showing a structural example of a heater of a drum type washing and drying machine according to the present invention.
Fig. 4 is a perspective view illustrating a structure of the drum type washing and drying machine of fig. 1 near the bottom surface of the outer tub.
Fig. 5 is a flowchart showing a flow of a washing process in the drum type washing and drying machine of fig. 1.
Fig. 6 is a flowchart showing a flow of a control process of the pre-washing process of fig. 5.
Fig. 7 is a flowchart showing a flow of a control process of the main washing step a of fig. 5.
Fig. 8 is a flowchart showing a flow of a control process of the main washing step B of fig. 5.
Detailed Description
Next, a drum type washing and drying machine according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, the overall structure of the drum-type washing and drying machine will be described with reference mainly to fig. 1 and 2. Fig. 1 is an external perspective view showing a drum type washing and drying machine according to the present embodiment. Fig. 2 is a side view schematically showing an internal structure of the drum type washing and drying machine of fig. 1 after a side plate of a casing is removed. The front-rear, top-bottom, left-right directions in the following description are based on the front-rear, top-bottom, left-right directions shown in fig. 1.
The housing 1 constituting the outer contour is mounted on a base 4 and includes left and right side plates 6, a front cover 5, a rear cover 2, and an upper cover 7. The front face mask 5 includes an upper front face mask 5a and a lower front face mask 5 b. The left and right side plates 6 are coupled by an upper reinforcing member, a front reinforcing member, and a rear reinforcing member (all not shown) in the form of コ, and form a box-shaped casing 1 together with the base 4.
The door 3 for closing an inlet for entrance and exit of clothes provided at substantially the center of the front cover 5 is supported openably and closably by a front reinforcement hinge (not shown). By pulling the handle 3a, a lock mechanism (not shown) is unlocked and locked closed by pushing the door 3 toward the front cover 5. The front reinforcing member has a circular opening for allowing the clothes to enter and exit, which is concentric with an opening of the outer tub 15 described later.
The operation panel 8 provided at the center of the upper portion of the casing 1 includes a power switch 8a and an operation button 8b, and is electrically connected to a control device 27 as a control unit provided at the upper portion of the casing 1.
The detergent container 13 provided on the left side of the upper portion in the casing 1 is used when detergents are put in from the upper portion of the casing during washing. When detergent is put in, the detergent cover 9 is opened. Further, a water outlet 13a is provided at a rear left side of the detergent container 13. Therefore, the bottom surface of the detergent container 13 is formed in a mortar shape so that the position of the water outlet 13a is the lowest.
On the rear side of the detergent container 13, water supply-related components such as a water supply solenoid valve 11, a bath water suction pump 12, and a water level sensor 25 are provided. A water supply unit 10 as a water supply unit is provided at an upper opening of the detergent container 13. The upper cover 7 is provided with a water supply hose connection port 11a from a water faucet and a water suction hose connection port 12a for hot water used for bathing.
The drum 14 (inner tub) which is a rotatably supported cylindrical washing and dehydrating tub has a plurality of through holes (not shown) for water and air to pass through and to ventilate on the outer peripheral wall and the bottom wall thereof, and an opening (not shown) for the entry and exit of laundry is provided on the front end surface thereof.
A fluid balance 14b integrated with the drum 14 is provided outside the opening. The fluid balance 14b is formed in a ring shape by synthetic resin or the like, and is configured to enclose a fluid (saline water or the like) having a large specific gravity therein, and when eccentricity occurs due to unbalance of laundry or the like during rotation of the drum 14, the eccentricity is removed by movement of the fluid in the fluid balance 14b, and a function of maintaining balance of rotation is provided. The rotation center axis of drum 14 is horizontal or inclined so that the opening side is high.
A cylindrical tub 15 coaxially encloses the drum 14, has an open front surface, and has a motor 18 mounted at the outer center of the rear end surface. The rotation shaft of the motor 18 penetrates the tub 15 and is coupled to the drum 14. A tub cover 16 capable of storing water in the tub 15 is provided at the opening of the front surface. The lower side of the tub 15 is supported in a vibration-proof manner by a damper (damper)17 fixed to the base 4. The rubber bellows 19 seals the outer tub 15 by closing the door 3.
A water supply port 15a for supplying water or detergent to the inside of the outer tub 15 is provided at the rear side of the outer tub 15. The water supply port 15a and the water outlet port 13a of the detergent container 13 are connected by a bellows hose 20 made of rubber. The concave recess 15b is provided on the inner peripheral surface of the bottom side of the outer tub 15 so as to extend in the axial direction of the outer tub 15. The bottom surface of the recessed portion 15b is an inclined surface that descends from the front side to the rear side, and a drain opening 21 is provided on the rear side of the recessed portion 15 b. A bellows hose 22 is connected to the drain port 21 via a joint 21a, and is connected to a circulation pump 23.
The circulation pump 23 discharges the detergent water stored in the bottom of the outer tub 15 from the shower outlet 23a provided in the upper part of the tub cover 16 through a circulation path (not shown), thereby distributing the high-concentration detergent water over the entire laundry, thereby achieving both cleaning power and water saving.
One end of the drain hose 24 is connected to a drain valve 24a provided at the water outlet of the circulation pump 23, and the other end extends to the outside of the machine.
A water level sensor 25 as a water level detecting part is connected to the bottom of the outer tub 15 by a plastic pipe 26, and detects the water level by measuring the pressure in the outer tub 15.
The control device 27 as a control unit has an electric conductivity measuring unit for controlling the water level detecting unit and the electric conductivity measuring unit. The conductivity measuring unit detects the conductivity (hardness) of the supplied water by a conductivity sensor 28 disposed at the inner bottom of the outer tub 15.
A heater 29 as a water heating part is mounted on the bottom surface of the outer tub, and the washing water in the outer tub 15 is heated, whereby the undissolved part of the detergent in the washing water can be reduced, the activity of enzymes in the detergent dissolved in the washing water can be promoted, and the cleaning performance can be improved. A thermistor 29b, which will be described later, is provided as a temperature detection means in the vicinity of the heating portion 29 a.
In the present invention, the control device 27 as the control section controls the start of heating of the water heating section based on the detection result of the water level detection section and the measurement result of the electrical conductivity measurement section. In this way, for example, the water level can be detected by the conductivity measuring unit even in a state where the water level detecting unit is not operating, and abnormal heating in a state where the water heating unit is not immersed in water, that is, in a state where the water heating unit is empty, can be prevented, that is, a dual idle-burning prevention mechanism can be realized, and the safety of the product can be further improved.
The conductivity sensor 28 is shown in fig. 4, in which 2 electrodes 28a are arranged to face each other, and the electrical conductivity is calculated by measuring the resistance value between these electrodes 28 a. Therefore, the sensor can be used as a member for detecting the hardness of water or the like by measuring the electrical conductivity of water existing between electrodes. Further, the present invention can be used as a means for determining whether or not water is present inside the outer tub 15 by using a difference in resistance between water and air, or as a means for detecting a detergent concentration of the detergent liquid and a stain concentration in the detergent liquid by measuring a change in electrical conductivity of water.
Fig. 3 shows the structure of the heater 29. The heater 29 includes: a heating part 29a for heating water in the tub; a thermistor 29b for detecting the temperature in the tub at the time of temperature control; a rubber packing 29c for water-sealing the outer tub; and a flange 29d for mounting the heater 29 to the outer tub 15, a flange 29e, a bolt 29f, and a nut 29g, the bolt 29f being fixed to the flange 29d by tightening.
When the heater 29 is inserted into a hole (not shown) having a similar shape to the rubber seal 29c and one turn larger provided in the outer tub 15 and the nut 29g is tightened in this state until the flange 29e comes into contact with the outer tub 15, the distance between the flange 29d and the flange 29e is narrowed by the bolt 29f and the nut 29g, and the rubber seal 29c between the flange 29d and the flange 29e is compressed in the longitudinal direction of the heater 29 and entirely swells in a direction perpendicular to the longitudinal direction, thereby applying a pressing force to the hole of the outer tub 15 and fixing the heater 29 with water sealing.
The heating unit 29a is configured to: the electric heating wire 29h wound in a coil shape passes through the inside of the metal tube, and the periphery of the electric heating wire 29h is covered with an insulating powder (not shown), whereby the electric heating wire 29h is fixed and the metal tube and the electric heating wire 29h are insulated. Temperature fuses (not shown) are provided at both ends of the heating wire 29h, and when the temperature of the heater 29 itself rises excessively due to abnormal heating, the fuses are blown to forcibly cut off the power supply.
Fig. 4 shows a structure of a tub bottom. It is constituted as follows: the conductivity sensor 28 is installed at a higher position when viewed from a horizontal height with respect to the heater 29, and when the conductivity sensor 28 determines that water is present, the water is stored up to a height at which the heater 29 is entirely immersed in the water, and a dry-fire state of the heater can be prevented. Further, since the heater cover 30 made of stainless steel is attached to the bottom surface of the outer tub 15, the heater does not spread to peripheral components even when the sensors are not operated and the heater is empty.
Fig. 5 shows a control flow of the washing operation using warm water in the present embodiment.
First, when the washing machine starts to operate, in the detection step of S1, drum 14 is rotated by motor 18 connected to drum 14, the current of motor 18 at this time is measured to measure the amount of laundry put into drum 14, and the amount of water used during operation and the rotation control content of drum 14 are determined.
Then, in the water supply step of S2, the water supply solenoid valve 11 is opened to supply water into the tub 15 via the water supply unit 10 as the water supply unit, and in step S201, the water level of the water stored in the tub 15 is detected by using the water level sensor 25 as the water level detecting unit connected to the tub by a pipe, and if the water level does not reach a certain level within a certain time, the operation is stopped in consideration of an abnormality in the water supply solenoid valve 11 or the drain valve 24a, and an error is indicated by a buzzer or on the operation panel 8 to notify the user of the abnormality. After reaching a certain water level, the water supply solenoid valve 11 is closed to automatically stop the water supply, and the process proceeds to a washing step.
The washing process is classified into a pre-washing process of S3 and a main washing process of S4 and S5, and as shown in fig. 6, in the pre-washing process S3, a high-concentration detergent solution in which a detergent is dissolved in a small amount of water is generated in step S301 (detergent dissolving process), and the high-concentration detergent solution is sprayed to all the laundry in the tub by the circulation pump 23 in step S302 (circulating water spraying process) to permeate the laundry. After water is supplied again in step S303 and water is stored in the tub (water supply step), a squeezing washing step is performed in step S304, and the washing is performed by increasing the rotation speed of the drum to a predetermined value or more and spraying water in a state where the laundry is attached to the inner surface of the drum 14 by centrifugal force.
Then, the process proceeds to main washing step a of S4, as shown in fig. 7, additional water supply is performed in step S401, after the water level sensor 25 determines that the water level is equal to or higher than the reset water level Tr, the value of the conductivity sensor 28 is read in step S402, the process proceeds to the next step (step S403) when the value is equal to or higher than a certain value (predetermined threshold), and when the read value of the conductivity sensor 28 is equal to or lower than the predetermined value at this time, the process of heater control in the subsequent main washing step is skipped, the main washing step a is performed without using the heater 29 for a predetermined time, and the process proceeds to main washing step B of S5.
In step S403, heater 29 is turned ON (ON), and in next step S404, the current value is measured to determine whether or not a current value equal to or larger than a predetermined value flows. At this stage, when the current value is equal to or less than the predetermined value, it is determined that the heater 29 is disconnected, the subsequent step of hot water washing using the heater 29 is skipped, the main washing step a is performed without using the heater 29 for a predetermined time, and the process then proceeds to the main washing step B of S5.
When the current value at the time of turning on the sheath heater (sheath heater) is equal to or greater than the predetermined value in step S404, it is determined that the heater 29 is not disconnected and the connection terminal is not detached but is normally connected, and the process proceeds to next step S405, and after turning OFF (OFF) the heater 29, the current value in the state where the heater 29 is turned OFF is measured in step S406, and it is determined whether or not the current value is lower than the predetermined value. At this time, when the current value is equal to or greater than the predetermined value, it is determined that the control circuit of the heater 29 is short-circuited, and the power supply to the main body is cut off to complete a series of operations for safety.
After that, after the stirring operation in step S407, the value of the water level sensor 25 is read in step S408, and when the water level at this time is lower than the reset water level Tr, the water supply in step S409 is performed. When the water level is higher than the reset water level Tr, the water supply operation in step S409 is skipped, and the operation proceeds to the stirring operation in step S410. After the above steps from step S408 to step S410, it is determined in step S411 whether or not a predetermined time has elapsed, and if the predetermined time has elapsed, the operation returns to the water level determination in step S408, and the operation is repeated until the predetermined time has elapsed, thereby washing the laundry. The above-described process performs cleaning at normal temperature without turning on the heater 29.
After the process shifts to the main washing step B (S5), as shown in fig. 8, first, it is determined whether or not the read value of the water level sensor 25 is equal to or higher than the reset water level Tr in step S501, and when the water level is equal to or higher than the reset water level Tr, the value of the conductivity sensor 28 is measured and determined whether or not the measured value is equal to or higher than the threshold value in the next step S502. When the water level is lower than the reset water level Tr, the flow proceeds to step S503, and water is supplied until the water level in the tub is higher than the reset water level Tr.
When the value of the conductivity sensor 28 is lower than the threshold value in step S502, it is determined that the actual water level has dropped to a level at which the heating portion 29a of the heater 29 is exposed due to a failure of the water level sensor 25 or the like, and the process proceeds to a normal washing process in which the heater 29 is not used. When the read value of the conductivity sensor 28 is equal to or greater than the threshold value, the heater 29 is completely immersed in the water, and therefore it is determined that the heating by the heater 29 is possible in a safe state, and the process proceeds to the next step S504.
That is, when the water level sensor 25 detects that the water level in the drum 14 has been raised to a predetermined level in addition to the water level of the water supplied to the heater 29 completely submerged in the water, the heater 29 controls the water in the drum 14 to start heating. By performing such control, even when the water level sensor 25 has some abnormality and the detected value is erroneous, the measurement result of the conductivity sensor 28 can be seen, and the heater can be suppressed from being burned empty.
In step S504, the temperature of water is read by the thermistor 29b, and when the temperature is equal to or lower than the set temperature TL, the heater 29 is turned on in step S505 to raise the temperature of water. Thereafter, in step S505, the water temperature is measured by the thermistor 29b in the same manner, and when the temperature is equal to or lower than the set temperature TH, the operation proceeds to step S507, the heater is kept on for a predetermined time ta (for example, 3 minutes), and after the predetermined time ta elapses, the operation proceeds to step S508, and it is determined whether or not the operation time of the main washing process is finished, and when the operation time is not finished, the operation returns to step S506, and the water temperature determination by the thermistor 29b is performed again.
When the operation time of the main washing step B has elapsed during the time of step S508, the heater 29 is turned off at step S509, and the process proceeds to the rinsing step S6, which is the next step.
When the temperature detected by the thermistor 29B is higher than the set temperature TH in step S506, the process proceeds to step S510, and after the heater 29 is turned off, the stirring operation is continued for a predetermined time ta in step S511, and then it is determined whether or not the operation time of the main washing step B has ended in step S512. When it is determined that the operation time has ended, the process proceeds directly to the rinsing step S6, and when it is determined that the operation time has not ended, the process returns to step S501, the water level sensor 25 and the conductivity sensor 28 detect the water level again, and the steps are repeated until the operation time of the main washing step B is ended.
When the water temperature detected in step S504 is higher than the set temperature TL, the state in which the heater is off is maintained, and the process proceeds to step S511, and then the operation is performed as described above. At this time, the relation between the set temperatures TL and TH is set so that TL < TH, and the above-described steps from S501 to S512 are repeated, so that the heater 29, such as a sheath heater, is used to heat the water until the water temperature of the water stored in the tub exceeds the set temperature TH, and when the water temperature exceeds the set temperature TH, the heater 29 is turned off, and then when the water temperature of the water in the tub decreases to become lower than the set temperature TL, the heater 29 is turned on and re-heats the water. This operation is repeated until the main washing B operation time is finished, and the laundry is washed with warm water, whereby the washing power of the laundry can be improved.
In the rinsing step S6, the drum 14 is rotated at a high speed as an intermediate spin-drying operation (not shown), and the washing liquid that has penetrated into the laundry is pushed out by the rotational centrifugal force of the tub and discharged from the drain path to the outside of the machine. By repeating the intermediate dehydration and water supply operations a predetermined number of times, detergent components contained in the laundry are scattered together with the water and removed.
Thereafter, the process proceeds to a dehydration step S7, where drum 14 is rotated at a high speed to scatter and remove moisture in the laundry.
When the washing and drying operation is set, the drying process S8 is performed to dry the laundry.
After the operation is completed, the series of operation control is completed.
By performing the above control, in the washing machine of the present embodiment, the water level detection control is performed by the conductivity measuring unit (conductivity sensor 28) in addition to the water level detection control by the water level detecting unit (water level sensor 25), and when the read value of the conductivity sensor 28 is equal to or less than the predetermined value, that is, when the water level is lower than the predetermined value, the main washing process is performed in a state where the heater 29 is turned off, so that abnormal heating in a state where the heater is not operated is prevented, that is, a double idle-burning prevention mechanism is realized, and the safety of the product is further improved.
In the present embodiment, although the drum-type washing and drying machine is used for the description, the present invention can be applied to a so-called vertical (pulsator) washing and drying machine or a washing machine having no drying mechanism by changing the arrangement and control of the sensor and the heater within the scope of the gist of the present invention.
In the present embodiment, the description has been given of the mode in which the conductivity sensor 28 is used as the means for detecting the water level to measure the conductivity of the water in the tub, but a means for detecting the water level by combining a float and a mechanical switch, for example, may be used.
Description of the reference numerals
1 casing
3 door
10 Water supply Unit
14 roller
15 outer barrel
16 outer barrel cover
18 electric machine
25 water level sensor
27 control device
28 conductivity sensor
29 heater
30 heater shield.
Claims (3)
1. A washing machine, characterized by comprising:
an outer tub for storing water;
an inner tub rotatably supported in the outer tub and capable of receiving laundry;
a water supply part for supplying water to the outer barrel;
a water heating part heating water supplied into the tub;
a water level detecting part for detecting the water level in the outer barrel;
a conductivity measuring part for measuring the conductivity of the water in the outer barrel; and
a control part for controlling the water level detection part and the conductivity measurement part,
the control part controls the heating part to start heating based on a detection result of the water level detection part and a measurement result of the conductivity measurement part.
2. A washing machine as claimed in claim 1, wherein:
the conductivity measuring section is provided at a position higher than the water heating section.
3. A washing machine as claimed in claim 2, characterized in that:
the control unit performs the following control:
the water level detecting unit detects the amount of water supplied into the inner tub until the water heating unit is completely submerged in the water, and the conductivity measuring unit detects that the water level has risen to a predetermined level, and then the water heating unit starts heating the water in the inner tub.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-031214 | 2019-02-25 | ||
| JP2019031214A JP6966494B2 (en) | 2019-02-25 | 2019-02-25 | Washing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111676647A true CN111676647A (en) | 2020-09-18 |
Family
ID=72261620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910824570.5A Pending CN111676647A (en) | 2019-02-25 | 2019-09-02 | Washing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6966494B2 (en) |
| CN (1) | CN111676647A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022080943A (en) * | 2020-11-19 | 2022-05-31 | パナソニックＩｐマネジメント株式会社 | Clothing treatment device |
| WO2023002711A1 (en) * | 2021-07-19 | 2023-01-26 | 日立グローバルライフソリューションズ株式会社 | Washing machine |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2488970A1 (en) * | 2003-12-05 | 2005-06-05 | Potter Electric Signal Company | Low water cut-off system |
| CN1924155A (en) * | 2005-09-02 | 2007-03-07 | 松下电器产业株式会社 | Tumble washing machine |
| CN101220551A (en) * | 2006-12-14 | 2008-07-16 | E.G.O.电气设备制造股份有限公司 | Method for controlling a washing machine |
| JP2011237240A (en) * | 2010-05-10 | 2011-11-24 | Nihon Itomic Co Ltd | Scale detection sensor and scale detection method |
| CN102677428A (en) * | 2011-02-23 | 2012-09-19 | 松下电器产业株式会社 | Drum type washing machine |
| CN103674185A (en) * | 2013-11-28 | 2014-03-26 | 成都欧浦特控制阀门有限公司 | System based on detection precision improvement |
| US20170147013A1 (en) * | 2013-11-08 | 2017-05-25 | Flashpoint Technologies, Llc | Automatic pool and spa water leveler on a non-static line |
| CN207331814U (en) * | 2017-09-12 | 2018-05-08 | 湖南主导科技发展有限公司 | Feed water control system and water supply system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3041176B2 (en) * | 1993-11-24 | 2000-05-15 | シャープ株式会社 | Washing machine washing control device |
| JPH09215893A (en) * | 1996-02-15 | 1997-08-19 | Matsushita Electric Ind Co Ltd | Washing machine |
| KR100479084B1 (en) * | 2002-11-28 | 2005-03-28 | 엘지전자 주식회사 | Error Detecting Method for Washing Machine |
| JP5152239B2 (en) * | 2010-03-26 | 2013-02-27 | パナソニック株式会社 | Washing machine |
| JP2017079861A (en) * | 2015-10-23 | 2017-05-18 | 東芝ライフスタイル株式会社 | Washing machine |
-
2019
- 2019-02-25 JP JP2019031214A patent/JP6966494B2/en active Active
- 2019-09-02 CN CN201910824570.5A patent/CN111676647A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2488970A1 (en) * | 2003-12-05 | 2005-06-05 | Potter Electric Signal Company | Low water cut-off system |
| CN1924155A (en) * | 2005-09-02 | 2007-03-07 | 松下电器产业株式会社 | Tumble washing machine |
| CN101220551A (en) * | 2006-12-14 | 2008-07-16 | E.G.O.电气设备制造股份有限公司 | Method for controlling a washing machine |
| JP2011237240A (en) * | 2010-05-10 | 2011-11-24 | Nihon Itomic Co Ltd | Scale detection sensor and scale detection method |
| CN102677428A (en) * | 2011-02-23 | 2012-09-19 | 松下电器产业株式会社 | Drum type washing machine |
| US20170147013A1 (en) * | 2013-11-08 | 2017-05-25 | Flashpoint Technologies, Llc | Automatic pool and spa water leveler on a non-static line |
| CN103674185A (en) * | 2013-11-28 | 2014-03-26 | 成都欧浦特控制阀门有限公司 | System based on detection precision improvement |
| CN207331814U (en) * | 2017-09-12 | 2018-05-08 | 湖南主导科技发展有限公司 | Feed water control system and water supply system |
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| JP2020130844A (en) | 2020-08-31 |
| JP6966494B2 (en) | 2021-11-17 |
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Application publication date: 20200918 |