CN111926523B - Washing machine - Google Patents
Washing machine Download PDFInfo
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- CN111926523B CN111926523B CN202010137865.8A CN202010137865A CN111926523B CN 111926523 B CN111926523 B CN 111926523B CN 202010137865 A CN202010137865 A CN 202010137865A CN 111926523 B CN111926523 B CN 111926523B
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- temperature
- predetermined
- drying
- intensity
- heating unit
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
The invention provides a washing machine capable of reducing shrinkage of clothes and reducing uneven drying. The drying process comprises the following steps: a standard drying step of drying at a predetermined temperature; and a low-temperature drying step of drying at a temperature lower than a predetermined temperature, wherein in the low-temperature drying step, the heating unit is heated at a predetermined first intensity for a predetermined time, and after the time has elapsed or after the detected temperature of the temperature detecting unit has reached the predetermined temperature before the time has elapsed, the heating unit is heated at a second intensity weaker than the first intensity, and after the detected temperature of the temperature detecting unit has reached the predetermined first temperature, the heating unit is turned off when the detected temperature of the temperature detecting unit has reached a second temperature higher than the first temperature and lower than the predetermined temperature, and the heating unit is turned on after the predetermined time has elapsed after the turn-off, and the turn-off and the turn-on are repeated a plurality of times every predetermined time has elapsed after the turn-on.
Description
Technical Field
The present invention relates to a washing machine having a dry running function.
Background
Conventionally, a washing machine is known, which is equipped with a "drying operation program" of a known method of determining a degree of drying of laundry by detecting a temperature inside and outside a washing tub, and controlling a drying operation in accordance with the degree of drying to dry the laundry. (for example, patent document 1). In order to raise the temperature inside the washing tub, wind generated by rotating the fan circulates inside the washing tub via the PTC heater. Regarding the drying degree of the clothes, the principle that when the water content of the clothes is reduced and the evaporation amount is reduced, the temperature difference between the inside and the outside of the drum is observed to judge the drying degree, and if the temperature difference exceeds the threshold value, the PTC heater is switched off, and the drying operation is ended.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 10-043499
Disclosure of Invention
Technical problem to be solved by the invention
In order to reduce shrinkage of laundry, it is very important to reduce the temperature in the tub as much as possible. Therefore, it is important to maintain a low temperature in the tub, which is lower than when the PTC heater is continuously operated, in order to reduce drying unevenness. In addition, as a method of reducing the temperature in the tub, there is a method of reducing the resistance value of the PTC heater, but in view of mass productivity, series development, and cost, a method of not changing the resistance of the PTC heater is preferable.
The invention provides a washing machine which reduces shrinkage of clothes and has less uneven drying.
Means for solving the problems
In order to solve the above problems, a washing machine according to the present invention includes, as an example thereof: a water bucket arranged in the shell; a water supply part for supplying water to the water bucket; a heating section for heating air to obtain dry air; an air supply part for circulating the drying air; a temperature detecting part for detecting the temperature in the tub or the temperature of the laundry; and a control unit having a drying step that includes: a standard drying step of drying at a predetermined temperature; and a low-temperature drying step of drying at a temperature lower than a predetermined temperature, wherein in the low-temperature drying step, the heating unit is heated at a predetermined first intensity for a predetermined time, and after the time passes or after the detected temperature of the temperature detecting unit reaches the predetermined temperature, the heating unit is heated at a second intensity weaker than the first intensity, and after the detected temperature of the temperature detecting unit reaches the predetermined first temperature, the heating unit is turned off when the detected temperature of the temperature detecting unit reaches a second temperature higher than the first temperature and lower than the predetermined temperature, and after the heating unit is turned off, the heating unit is turned on for a predetermined time, and after the heating unit is turned on, the turning off and the turning on are repeated a plurality of times every predetermined time after the turning on.
Effects of the invention
According to the present invention, a washing machine with reduced shrinkage of laundry and less uneven drying can be provided.
Drawings
Fig. 1 is a perspective view showing an external configuration of a washing machine according to the present invention.
Fig. 2 is a sectional view showing the structure of the washing machine of the present invention.
Fig. 3 is a diagram showing a control flow chart of a standard drying process according to the present invention.
Fig. 4 is a diagram showing a control flow chart of the low-temperature drying process according to the present invention.
Fig. 5 is a diagram showing the evolution of the temperature in the tub in the low-temperature drying process according to the present invention.
Description of the reference numerals
1: a washing machine; 2: a housing; 3: an outer tub (tub); 4: a water bucket; 5: an outer tub cover; 6: an inner cover; 7: SUS plate; 8: rotating the leaves; 10: a main motor; 11: a rotation detection device; 12: motor current detecting means; 13: a water supply unit; 14: and a drying unit: the method comprises the steps of carrying out a first treatment on the surface of the 15: a fan; 16: an air supply pipeline; 17: a drying pipe; 18: a blow-out nozzle; 21: an upper mask; 22: an outer cover; 23: a front panel; 24: an operation panel; 25: a trap part; 30: a temperature measurer.
Detailed Description
Hereinafter, embodiments of the present invention (hereinafter referred to as "the present embodiment") will be described in detail with reference to the accompanying drawings. The drawings are only schematic illustrations to the extent that the present invention can be fully understood. Therefore, the present invention is not limited to the examples of the drawings. In the drawings, common components (members) and similar components are denoted by the same reference numerals, and their repetitive description is omitted.
Hereinafter, embodiments of the present invention will be described with reference to fig. 1 to 5.
< external Structure of washing machine >
Hereinafter, an external configuration of the washing machine 1 of the present embodiment will be described with reference to fig. 1 to 2. Fig. 1 is a perspective view showing an external configuration of a washing machine 1 according to the present embodiment. Fig. 2 is a sectional view showing the structure of the washing machine 1.
Here, the washing machine 1 will be described as a washing and drying machine having a drying function for objects to be washed (cloths). Here, the description will be made with reference to the washing machine 1 as a vertical washing machine in which a vertical water tub is disposed inside a casing. However, the washing machine 1 may be a drum type washing machine.
As shown in fig. 1, the washing machine 1 has an upper cover 21 and an outer cover 22 that can be opened and closed freely on the upper surface of a casing 2. In the present embodiment, the washing machine 1 has a detachable front panel 23 on the front surface of the casing 2. The upper mask 21 is disposed on the rear upper surface of the housing 2. The cover 22 is disposed on the center upper surface of the housing 2. An operation panel 24 for operating the washing machine 1 is provided on the upper surface of the outer cover 22.
< internal Structure of washing machine >
Hereinafter, the internal structure of the washing machine 1 will be described with reference to fig. 2. Fig. 2 is a sectional view showing an internal structure of the washing machine 1.
As shown in fig. 2, the washing machine 1 has an outer tub 3 inside a casing 2, and a water tub 4 (washing and dehydrating tub) inside thereof.
The outer tub 3 includes: a tub cover 5 provided on the upper part; a lid member 5a provided in the opening of the tub cover 5 in a sealing manner; an inner cover 6 provided at the tub cover for taking out and putting in laundry; and a lid member 6a provided in the opening of the inner lid in a sealing manner.
The water tub 4 (washing and dehydrating tub) has a bottomed cylindrical shape with an open upper surface. The water tub 4 has: SUS plate 7 constituting a body portion of the cylinder; a rotary blade 8 rotating at the bottom of the water tub 4; a balance ring 9 for maintaining balance of the water tub 4. A plurality of through holes 7a for water and ventilation are formed in the SUS plate 7. The gimbal 9 is a fluid balancer with fluid sealed inside.
The washing machine 1 includes: a driving device 10 for rotationally driving the water tub 4 and the rotary vane 8; a rotation detection device 11 for detecting the operation of the driving device 10; and motor current detecting means 12. The driving device 10 includes: a motor 10a for rotating the water tub 4 and the rotary blade 8; a clutch mechanism 10b for defining the rotation direction and rotation speed of the water tub 4 and the rotary blade 8; a rotation shaft 10c connected to the rotation blade 8. The rotation shaft 10c is arranged at the center of the water tub 4 in a plan view.
In addition, the washing machine 1 includes, at an upper rear portion of the casing 2: a water supply unit 13 which is a water supply part for supplying water to the water tub 4; a drying unit 14 having a heating portion such as a heater for heating air to obtain drying air; a fan 15 for circulating a drying air; an air supply duct 16; and a drying duct 17.
The air duct 16 is disposed between the fan 15 and the air outlet 18, and the drying unit 14 is disposed in a middle portion thereof. The air supply duct 16 is connected to the air outlet 18 via a bellows a 19. The blow nozzle 18 blows the drying air heated by the drying unit 14, which is sent from the fan 15, into the outer tub 3. The drying duct 17 is disposed between the tub 3 and the fan 15. The drying duct 17 is connected to the sinking portion 25 of the outer tub 3 through a bellows B20.
The washing machine 1 further includes a control unit that performs a washing process, a rinsing process, and a drying process, and water is supplied from the water supply unit 20 to the outer tub 3, for example, to soak the water tub 4 (washing and dehydrating tub) with water during the washing process and the rinsing process. In the washing machine 1, for example, in the drying step, the fan 15 is rotated to send air to the air supply duct 16, and the heating portion of the drying unit 14 heats the air to obtain drying air, so that the drying air passes through the inside of the outer tub 3 and the water tub 4. Thereby, the washing machine 1 dries the laundry (cloth) stored in the water tub 4. The washing machine 1 repeats the same operation by feeding air passing through the inside of the outer tub 3 and the water tub 4 from the drying duct 17 to the air supply duct 16 by the fan 15.
In addition, the washing machine 1 includes: a discharge path 26 for discharging water; and a drain valve 27 for opening and closing the drain path 26.
< summary of the embodiment >
The control method of the drying process according to the present embodiment will be described below with reference to fig. 3 to 5.
The drying process includes: a standard drying step (standard drying program) of performing a drying operation at a predetermined temperature (hereinafter, second predetermined temperature); and a low-temperature drying step (low-temperature drying step) of performing a drying operation at a temperature lower than the predetermined temperature (hereinafter, second temperature).
Fig. 3 is a flowchart showing a standard drying process, fig. 4 is a flowchart showing a low-temperature drying process, and fig. 5 is a graph showing time and a tub temperature (or laundry temperature) in the low-temperature drying process. However, the solid line in fig. 5 shows the value of the low-temperature drying process according to the present invention, and the dash-dot line shows the value of the standard drying process.
In the standard drying step, the PTC heater is operated for a predetermined period of time after the start of the drying operation (hereinafter, simply referred to as "strong operation (first intensity)), or the PTC heater is operated for a minimum period of time after the temperature measured by the temperature measuring device 30 as the temperature detecting unit exceeds a predetermined value set in advance (hereinafter, simply referred to as" weak operation (second intensity)). After the temperature in the tub measured by the temperature measurer 30 as a temperature detecting part reaches the first temperature, which is the temperature at which the temperature in the tub is balanced, the PTC heater output is minimized (hereinafter, simply referred to as a weak operation (second intensity)). Then, when the temperature in the tub measured by the temperature measuring device 30 reaches the second predetermined temperature, it is determined that the laundry is dried, and the PTC heater is turned off, so that the operation is ended. The second predetermined temperature is set to a temperature at which the laundry is completely dried. The second strength of the heating portion may be weaker than the first strength.
In the case of the control of the standard drying process, when the drum is operated to the second predetermined temperature, the temperature in the drum becomes high, and the shrinkage of the laundry cannot be suppressed.
In the present invention, the second temperature lower than the second predetermined temperature is set, and the PTC heater as the heating portion is repeatedly turned on and off to keep the temperature in the tub constant, thereby suppressing the drying unevenness. Thereby, the temperature in the tub is lower than the temperature in the tub of the standard drying process of the drying operation. Further, the first temperature is the same in the standard drying process and in the low temperature drying process.
Specifically, the control of the low-temperature drying process according to the present invention will be described with reference to fig. 4.
After the start of drying, the heating unit is operated at the first intensity for a predetermined time or operated until the temperature in the tub measured by the temperature measuring device 30 before the predetermined time is operated exceeds a predetermined value, and then the heating unit is operated at the second intensity. Then, when the temperature in the tub measured by the temperature measuring device 30 as the temperature detecting unit reaches a second temperature (not higher than the first predetermined temperature) (for example, 65 ℃) higher than the first temperature, the PTC heater is turned off even if the laundry is not dried, with the first temperature (predetermined temperature) being the temperature at the time of balancing the temperature in the tub measured by the temperature measuring device 30 as a reference value (for example, 60 ℃). After a predetermined period of Amin has elapsed from the turn-off, the heater is turned on, the heating unit is operated at the second intensity, and after a predetermined period of B min, the heater is turned off. After this routine (cycle) is executed a predetermined number of times (C times), the heater is turned off, and the operation is completed. The values of a and B, C can be changed as appropriate.
Fig. 5 also shows the evolution of the output power of the PTC heater when the control of fig. 4 is performed. The output power shown in fig. 5 is proportional to the evolution of the temperature in the tub, depending on the intensity or the amount of current flowing in the on/off state.
The heater is repeatedly turned on and off in this way, so that the temperature in the tub can be kept low, and uneven drying can be suppressed.
As described above, according to the present invention, a washing machine that suppresses shrinkage of laundry and suppresses uneven drying can be provided.
Claims (1)
1. A washing machine, comprising:
a housing;
a water tub disposed inside the housing;
a water supply part for supplying water to the water bucket;
a heating section for heating air to obtain dry air;
an air supply part for circulating the drying air;
a temperature detecting part for detecting the temperature in the tub or the temperature of the laundry; and
a control part having a drying process for controlling the drying process,
the drying process comprises the following steps: a standard drying step of drying at a predetermined temperature; and a low-temperature drying step of drying at a temperature lower than the predetermined temperature,
in the standard drying step, the heating unit is heated at a predetermined first intensity for a predetermined time, and after the time has elapsed or after the temperature detected by the temperature detecting unit has reached a predetermined temperature, the heating unit is heated at a second intensity weaker than the first intensity, and after the temperature detected by the temperature detecting unit has reached the first temperature, the heating unit is continued to be heated at the second intensity, and then, when the temperature detected by the temperature detecting unit has reached the predetermined temperature, the heating unit is turned off to terminate the operation,
in the low-temperature drying step, the heating unit is heated at a predetermined first intensity for a predetermined time, and after the time has elapsed or after the temperature detected by the temperature detecting unit has reached a predetermined temperature before the time has elapsed, the heating unit is heated at a second intensity weaker than the first intensity, and after the temperature detected by the temperature detecting unit has reached a predetermined first temperature, the heating unit is turned off when a second temperature higher than the first temperature and lower than the predetermined temperature has been reached, and after a predetermined time has elapsed after the turning off, the heating unit is turned on, and after the turning off and the turning on are repeated a predetermined number of times for each predetermined time has elapsed after the turning on,
the first temperature is the same in the standard drying process and the low-temperature drying process.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-090359 | 2019-05-13 | ||
| JP2019090359A JP7132173B2 (en) | 2019-05-13 | 2019-05-13 | washing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111926523A CN111926523A (en) | 2020-11-13 |
| CN111926523B true CN111926523B (en) | 2023-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010137865.8A Active CN111926523B (en) | 2019-05-13 | 2020-03-03 | Washing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7132173B2 (en) |
| CN (1) | CN111926523B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03215300A (en) * | 1990-01-19 | 1991-09-20 | Matsushita Electric Ind Co Ltd | Garment dryer |
| JPH0824497A (en) * | 1994-07-18 | 1996-01-30 | Matsushita Electric Ind Co Ltd | Clothing drier |
| JPH1043499A (en) * | 1996-08-02 | 1998-02-17 | Sanyo Electric Co Ltd | Clothes dryer |
| JP2016052395A (en) * | 2014-09-03 | 2016-04-14 | 株式会社東芝 | Washing and drying machine |
| CN106012411A (en) * | 2016-06-30 | 2016-10-12 | 无锡小天鹅股份有限公司 | Drying control method of washing machine and washing machine |
| CN106811945A (en) * | 2015-11-27 | 2017-06-09 | 无锡小天鹅股份有限公司 | Dryer and its load capacity determination methods |
| CN109695141A (en) * | 2017-10-24 | 2019-04-30 | 林内株式会社 | Clothesdrier |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160093879A (en) * | 2015-01-30 | 2016-08-09 | 삼성전자주식회사 | Clothing dryer and control method thereof |
-
2019
- 2019-05-13 JP JP2019090359A patent/JP7132173B2/en active Active
-
2020
- 2020-03-03 CN CN202010137865.8A patent/CN111926523B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03215300A (en) * | 1990-01-19 | 1991-09-20 | Matsushita Electric Ind Co Ltd | Garment dryer |
| JPH0824497A (en) * | 1994-07-18 | 1996-01-30 | Matsushita Electric Ind Co Ltd | Clothing drier |
| JPH1043499A (en) * | 1996-08-02 | 1998-02-17 | Sanyo Electric Co Ltd | Clothes dryer |
| JP2016052395A (en) * | 2014-09-03 | 2016-04-14 | 株式会社東芝 | Washing and drying machine |
| CN106811945A (en) * | 2015-11-27 | 2017-06-09 | 无锡小天鹅股份有限公司 | Dryer and its load capacity determination methods |
| CN106012411A (en) * | 2016-06-30 | 2016-10-12 | 无锡小天鹅股份有限公司 | Drying control method of washing machine and washing machine |
| CN109695141A (en) * | 2017-10-24 | 2019-04-30 | 林内株式会社 | Clothesdrier |
Non-Patent Citations (1)
| Title |
|---|
| 刘胜利 等.操作须知.《家用洗衣机的工作原理与维修技术》.新时代出版社,1993,第263-264页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020185090A (en) | 2020-11-19 |
| JP7132173B2 (en) | 2022-09-06 |
| CN111926523A (en) | 2020-11-13 |
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