WO2017041712A1 - 干衣机 - Google Patents

干衣机 Download PDF

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Publication number
WO2017041712A1
WO2017041712A1 PCT/CN2016/098310 CN2016098310W WO2017041712A1 WO 2017041712 A1 WO2017041712 A1 WO 2017041712A1 CN 2016098310 W CN2016098310 W CN 2016098310W WO 2017041712 A1 WO2017041712 A1 WO 2017041712A1
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WO
WIPO (PCT)
Prior art keywords
temperature
delay time
drum
time
exhaust gas
Prior art date
Application number
PCT/CN2016/098310
Other languages
English (en)
French (fr)
Inventor
香月淳吾
林田太一
森大树
Original Assignee
青岛海尔洗衣机有限公司
海尔亚洲株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 青岛海尔洗衣机有限公司, 海尔亚洲株式会社 filed Critical 青岛海尔洗衣机有限公司
Priority to KR1020187009688A priority Critical patent/KR102010351B1/ko
Priority to CN201680051486.9A priority patent/CN107923117B/zh
Priority to US15/758,681 priority patent/US10544541B2/en
Priority to EP16843650.9A priority patent/EP3348705B1/en
Publication of WO2017041712A1 publication Critical patent/WO2017041712A1/zh

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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
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/38—Time, e.g. duration
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/28—Electric heating
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/56—Remaining operation time; Remaining operational cycles
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/26—Heating arrangements, e.g. gas heating equipment
    • D06F58/263—Gas heating equipment

Definitions

  • the present invention relates to a clothes dryer which can reduce the temperature of the laundry when the drying is excessive, regardless of the type, quantity, and the like of the laundry, and reduce the damage to the laundry.
  • a dryer has been known in which a drying air heated by a burner is blown into a drum into which laundry to be dried is blown by a fan, and is exhausted from the back side of the main body (for example, Patent Document 1) .
  • FIG. 4 is a flow chart showing a processing procedure of a drying operation in a conventional dryer.
  • the processing shown in FIG. 4 is performed by the control unit as usual, and when the start button is pressed, the operation is started, and the process proceeds to step T1.
  • step T1 the control unit causes the drum and the fan to start rotating. Thereby, the supply and exhaust of the drying air to the drum is started.
  • step T2 the control unit ignites the burner. As a result, the air supply for the drying air of the high temperature is started.
  • step T3 the control unit starts counting the operation time.
  • step T4 the control unit determines whether the operation time has reached the end time, and determines whether or not the operation is to be ended. When it is judged that the operation is to be completed, the process proceeds to step T10. If it is determined that the operation is not completed, the process proceeds to step T5.
  • step T5 the control unit determines whether the exhaust gas temperature has reached the upper limit temperature. When it is judged that the exhaust gas temperature has reached the upper limit temperature, the process proceeds to step T6; and when it is determined that the exhaust gas temperature has not reached the upper limit temperature, the process returns to step T4.
  • step T6 the control unit stops the burner. Thereby, the drying air which is not heated at almost normal temperature is supplied into the drum, and the temperature in the drum is lowered.
  • step T7 the control unit determines whether the operation time has reached the end time, and determines whether or not the operation is to be ended. When it is judged that the operation is to be completed, the process proceeds to step T10. If it is determined that the operation is not completed, the process proceeds to step T8.
  • step T8 the control unit determines whether the exhaust gas temperature has reached the re-ignition temperature. When it is judged that the re-ignition temperature has been reached, the process proceeds to step T9; and if it is determined that the re-ignition temperature has not been reached, the process returns to step T7.
  • step T9 the control unit re-ignites the burner, and proceeds to step T4. Thereby, the drying air which supplies a high temperature to the drum is restored, and the temperature in the drum rises again.
  • step T10 the control unit stops the burner and stops the rotation of the fan and the drum, respectively. This ends the main process.
  • the conventional dryer suppresses the abnormal rise in the temperature in the drum by repeating the following processing, and suppresses the damage of the laundry caused by the overheating: when the temperature of the exhaust gas from the drum reaches a predetermined upper limit temperature, the burner is made (The heat source) is stopped to lower the temperature inside the drum, and then, when the exhaust gas temperature is lowered to a predetermined re-ignition temperature, the burner is re-ignited.
  • Patent Document 1 Japanese Laid-Open Patent Publication No. Hei 9-290095
  • An object of the present invention is to effectively solve such a problem, and an object of the invention is to provide a clothes dryer which can reduce the temperature of the laundry in the second half of the operation regardless of the type and amount of the clothes.
  • the laundry is uniformly dried while the damage of the laundry caused by the overheating is reduced.
  • the clothes dryer of the present invention is characterized in that it includes a drum that can accommodate laundry, an air supply and exhaust unit that supplies air to the exhaust unit, and a heating unit that heats the air supply to the drum. a drying air; an exhaust gas temperature detecting unit that detects a temperature of the drying air discharged from the drum; and a heating control unit that performs a temperature adjustment process when the row detected by the exhaust gas temperature detecting unit When the gas temperature reaches a predetermined upper limit temperature, the heating unit is stopped, and after the time when the exhaust gas temperature is lowered to a predetermined lower limit temperature, the heating unit is operated again, and the heating control unit has a delay time An insertion portion that inserts a delay time from a time point when the exhaust gas temperature is lowered to the lower limit temperature to a time period during which the heating unit is re-operated, and repeats the intermittently one time at a time The temperature adjustment process is gradually extended.
  • an upper limit value is set for the delay time, and when the temperature adjustment process is repeated and the delay time is reached to an upper limit value, the subsequent temperature adjustment process is performed with the delay time.
  • the heating unit is a non-adjustable burner that does not have a heating power adjustment function.
  • the drying air heated by the heating unit is supplied to the drum through the air supply and exhaust unit to dry the laundry, and the exhaust gas temperature detected by the exhaust gas temperature detecting unit reaches the upper limit temperature.
  • the time point is set to the approximate limit of the first half of the drying operation, and the time when the exhaust gas temperature reaches the upper limit temperature is not used as the reference, but the time when the exhaust gas temperature is lowered to the lower limit temperature is used as the reference for the re-operation of the heating unit.
  • the delay time insertion unit inserts a delay time that is gradually extended by intermittently repeating the temperature adjustment process, so that the drying of the clothes can be continued by the unheated drying air. Dry and reduce the temperature inside the drum to a lower temperature than in the previous temperature adjustment process. Therefore, regardless of the type, quantity, and the like of the laundry to be dried, the peak temperature in the drum for each temperature adjustment process can be gradually lowered in the latter half of the drying operation, thereby reducing the laundry in the state of excessive drying. The temperature can uniformly dry the entire laundry while sufficiently reducing the damage of the laundry due to overheating.
  • the delay time is determined by adding the predetermined additional time to the previous delay time, it is possible to easily perform uniform drying while sufficiently reducing the damage of the laundry due to overheating.
  • the above control of the entire clothing in which the delay time is determined by adding the predetermined additional time to the previous delay time, it is possible to easily perform uniform drying while sufficiently reducing the damage of the laundry due to overheating. The above control of the entire clothing.
  • the upper limit value is set for the delay time, it is possible to prevent the temperature of the laundry from being excessively lowered in the latter half of the drying operation, and it is possible to ensure the required baking without falling into an insufficient drying condition. Dry performance.
  • the manufacturing cost can be reduced as compared with the case of using the adjustment burner.
  • Fig. 1 is a view schematically showing a clothes dryer according to an embodiment of the present invention.
  • Fig. 2 is a block diagram showing the structure of the same dryer.
  • Fig. 3 is a flow chart showing the processing procedure of the drying operation in the same dryer.
  • FIG. 4 is a flow chart showing a processing procedure of a drying operation in a conventional dryer.
  • FIG. 1 is a view schematically showing a clothes dryer 1 according to an embodiment of the present invention, wherein Fig. 1(a) is a front view of the clothes dryer 1, and Fig. 1(b) is a side view of the clothes dryer 1.
  • FIG. 2 is a block diagram showing the configuration of the dryer 1.
  • the clothes dryer 1 of the present embodiment includes the apparatus main body 10, the drum 20 and the drum casing 21, the drum motor 23, the burner 30, the air supply and exhaust unit 4, the temperature sensor (thermistor) 31, and the control unit 5 ( Referring to Figure 2), it is particularly suitable for use in laundromats.
  • a combustion chamber 13 is formed at an upper portion thereof
  • a drying chamber 14 is formed at a middle portion thereof
  • a lower portion 14 is formed at a lower portion thereof.
  • the drum 20 is disposed in the cylindrical drum casing 21 in the drying chamber 14, and the axial center is the front-rear direction of the dryer main body 1, and is disposed concentrically with the drum casing 21. Further, the drum 20 is smaller than the diameter of the drum casing 21 and has a plurality of small holes (not shown) on the circumferential surface, and the forward rotation and the reverse rotation for releasing the laundry are repeated. Such a drum 20 can accommodate the laundry L to be dried.
  • An intake port 21a (see FIG. 1(a)) is formed at a position on the left side of the upper portion of the drum casing 21, and the intake port 21a communicates with a combustion chamber 13 to be described later via a short-sized ventilation duct 17.
  • An exhaust port 21b is formed at a position on the right side (see Fig. 1(a)). The front opening of the drum 20 can be opened and closed by the door 22 to be hermetically sealed.
  • the drum motor 23 is attached to the upper portion of the rear surface side of the apparatus main body 10.
  • the drum 20 is rotationally driven by the rotational force of the drum motor 23.
  • the burner 30 as a heating unit is disposed in the combustion chamber 13, and the supply air to the drying air in the drum 20 is heated through the small holes. Further, the burner 30 is a non-adjustable burner that does not have a firepower adjustment function.
  • the burner 30 is supplied/gas cut by the gas valve 30b shown in FIG. Further, an igniter 30a (see FIG. 2) is provided in the vicinity of the burner 30.
  • the air supply unit 4 performs air supply and exhaust of the drying air to the drum 20, and has a supply path 40, an exhaust fan 48a, and a fan motor 48b.
  • the supply passage 40 is composed of a combustion chamber 13, a ventilation duct 17, a drum casing 21, and a vent opening 40b formed in the lower partition plate 12, which faces the exhaust port 21b, a ventilating chamber 15, and a fan motor chamber 16.
  • the ventilating chamber 15 is formed below the lower partition plate 12, and is isolated from the fan motor chamber 16 by a partition 44 that is disposed substantially vertically. Further, an air filter 45 is disposed at a lower end portion of the shield plate 42 fixed to the lower partition plate 12 at the upper end portion and a lower end portion of the partition plate 44, and a vent port is formed at a rightward position of the partition plate 44. 44a (refer to Fig. 1 (a)).
  • the fan motor chamber 16 is provided with an exhaust fan 48a on the front surface side of the fan partition 47, and a fan motor 48b located on the rear surface side of the fan partition 47 and rotating the exhaust fan 48a.
  • An air outlet 47a is formed on the upper left side of the fan partition 47 (see Fig. 1(a)).
  • the temperature sensor 31 as the exhaust gas temperature detecting means detects the temperature (exhaust gas temperature) of the drying air exhausted from the drum 20, and the temperature sensor 31 is provided in the vicinity of the exhaust fan 48a, that is, the exhaust port of the fan partition 47. 47a. Although it is difficult to measure the temperature in the drum 20 in operation in real time, by using the temperature sensor 31, the temperature in the drum 20 can be indirectly measured in real time.
  • the operation of the dryer 1 is controlled by a control unit 5 (refer to FIG. 2) including a microcomputer.
  • the control unit 5 includes a heating control unit 55, a timer 51, a ROM 53, and a RAM 54, and executes a program (for example, temperature adjustment processing to be described later) stored in the ROM 53 by a microcomputer to perform a predetermined operation operation.
  • the RAM 54 temporarily stores data (for example, a re-ignition delay time to be described later) used when the above-described program is executed.
  • the control unit 5 can output a fan motor drive signal to the fan motor 48b, and can output a drum motor drive signal to the drum motor 23.
  • the heating control unit 55 can output an ignition signal to the igniter 30a, and can output a gas supply signal to the gas valve 30b.
  • the heating control unit 55 performs a temperature adjustment process of stopping the burner 30 when the exhaust gas temperature detected by the temperature sensor 31 reaches a predetermined upper limit temperature, and lowering the exhaust gas temperature to a predetermined lower limit temperature, that is, a re-ignition temperature. After the time point, the burner 30 is operated again.
  • the upper limit temperature is set to, for example, about 70 ° C in advance
  • the re-ignition temperature is set to, for example, about 40 to 45 ° C in advance.
  • the heating control unit 55 has a delay time insertion portion 56 that inserts a re-ignition delay time as a delay time from a time point when the exhaust gas temperature is lowered to the re-ignition temperature to a time when the burner 30 is re-operated.
  • the re-ignition time is gradually extended as the temperature adjustment process is repeated intermittently one at a time.
  • the dryer 1 of the present embodiment includes the drum 20 that can accommodate the laundry L, the supply and exhaust unit 4, and the air for the drying of the drum 20; the burner 30 serves as a heating unit to heat the air supply.
  • the delay time insertion unit 56 inserts the re-ignition delay time N as the delay time from the time point when the exhaust gas temperature is lowered to the re-ignition temperature to the time when the burner 30 is re-operated.
  • the temperature adjustment process is repeated intermittently, and the re-ignition time N is gradually extended.
  • the drying air heated by the burner 30 can supply the air to the drum 20 through the air supply and exhaust unit 4 to dry the laundry L, and set the exhaust gas temperature to the upper limit temperature.
  • the approximate limit of the front and rear half of the drying operation is not based on the time point at which the exhaust gas temperature reaches the upper limit temperature, but the time at which the exhaust gas temperature is lowered to the re-ignition temperature is used as a reference for the re-ignition of the burner 30.
  • the temperature adjustment process can be performed by the heating control unit 55 in the second half of the drying operation without strictly estimating the type and weight of the laundry L inserted into the drum 20.
  • the delay time insertion unit 56 is inserted and gradually extended by repeating the temperature adjustment process intermittently.
  • the re-ignition delay time N therefore, the drying of the laundry L can be continued by the unheated drying air, and the temperature in the drum 20 can be lowered to a lower temperature than in the previous temperature adjustment process. Therefore, regardless of the type, the quantity, and the like of the laundry L to be dried, the peak temperature in the drum 20 for each temperature adjustment process can be gradually lowered in the latter half of the drying operation, thereby smoothly reducing the overdrying The temperature of the laundry L in the state. Compared with the conventional method of continuously maintaining high temperature operation, the entire laundry L can be uniformly dried while sufficiently reducing the damage of the laundry L due to overheating.
  • the number of ignition/extinguishing of the burners 30 is reduced as compared with the above method, and therefore, it is also advantageous in terms of durability of the machine.
  • the re-ignition delay time N is inserted in a state where there is a possibility that there is still a portion that has not been dried, so that the temperature inside the drum 20 is lowered.
  • FIG. 3 is a flow chart showing the processing procedure of the drying operation in the clothes dryer 1. Hereinafter, the processing procedure of the drying operation will be specifically described using FIG. 3.
  • the door 22 is opened, and the laundry L to be dried is put into the drum 20, and after the door 22 is closed, a start button (not shown) is pressed to start the main flow.
  • step S1 the control unit 5 outputs a drum motor drive signal to the drum motor 23 to cause the drum 20 to start rotating, and outputs a fan motor drive signal to the fan motor 48b to cause the exhaust fan 48a to start rotating.
  • the air in the fan motor chamber 16 is discharged to the outside of the apparatus, and the air flows from the combustion chamber 13 toward the fan motor chamber 16 to the supply and discharge path 40, and the supply and exhaust of the drying air to the drum 20 is started.
  • step S2 the heating control unit 55 outputs a gas supply signal to the gas valve 30b, turns on the gas valve 30b, and outputs an ignition signal to the igniter 30a to ignite the burner 30. Thereby, the high temperature drying air is supplied to the drum 20.
  • step S3 the control unit 5 sets the re-ignition delay time N to 0 (seconds).
  • step S4 the control unit 5 causes the timer 51 to start counting the operation time.
  • step S5 based on the count value of the timer 51, the control unit 5 determines whether or not the operation time has reached the end time, and determines whether or not the medicine has finished operating.
  • the process proceeds to step S14, and if it is not determined that the operation is not completed, the process proceeds to step S6.
  • step S6 the control unit 5 determines whether or not the exhaust gas temperature detected by the temperature sensor 31 has reached the upper limit temperature.
  • the process proceeds to step S7, and if it is determined that the exhaust gas temperature has not reached the upper limit temperature, the process returns to step S5.
  • the amount of water in the drum 20 is large, even if high-temperature drying air is supplied, heat is used for evaporation of water, and it is difficult to raise the temperature in the drum 20, and the amount of laundry and clothing are contained. The more the amount of water, the longer it takes for the exhaust gas temperature to reach the upper limit temperature.
  • the texture, the number, and the like of the laundry L may differ, in general, even when the exhaust gas temperature reaches the upper limit temperature for the first time, even if the surface of the laundry L is dried, the inside is still wet.
  • step S7 the heating control unit 55 stops the supply of gas to the burner 30 by the gas valve 30b, and stops the burner 30 (extinguishing).
  • step S8 based on the count value of the timer 51, the control unit 5 determines whether or not the operation time has reached the end time, and determines whether or not the operation is to be ended. In the case of judging that the operation is to end, enter the step In step S14, if it is determined that the operation is not to be completed, the process proceeds to step S9.
  • step S9 the control unit 5 determines whether the exhaust gas temperature detected by the temperature sensor 31 has decreased to the re-ignition temperature. When it is judged that the exhaust gas temperature has decreased to the re-ignition temperature, the process proceeds to step S10, and if it is determined that the exhaust gas temperature has not decreased to the re-ignition temperature, the process returns to step S8.
  • step S10 the delay time insertion unit 56 waits for the output of the gas supply signal and the ignition signal to wait for the re-ignition delay time N.
  • step S11 the heating control unit 55 outputs a gas supply signal to the gas valve 30b, and outputs an ignition signal to the igniter 30a to re-ignite the burner 30.
  • step S12 the control unit 5 determines whether or not the re-ignition delay time N is 120 (seconds) or more. When it is determined that the re-ignition delay time N is 120 (second) or more, the process proceeds to step S5, and when it is determined that the re-ignition delay time N is not equal to or greater than 120 (seconds), the process proceeds to step S13.
  • 120 (seconds) is the upper limit value of the re-ignition delay time N.
  • the upper limit value is set for the re-ignition delay time N, when the temperature adjustment process is repeated and the re-ignition delay time N reaches the upper limit value, the subsequent temperature adjustment process is performed by the re-ignition delay time N. It prevents the temperature of the clothes from being excessively lowered, and ensures the required drying performance without being trapped in insufficient drying.
  • the upper limit value of the re-ignition delay time N is not limited to 120 seconds as long as the effect of the present invention can be exerted.
  • step S13 the control unit 5 adds 5 (seconds) as the additional time A to the re-ignition delay time N. Thereby, until the re-ignition delay time N reaches the upper limit value, the additional time is accumulated for the re-ignition delay time N every time the temperature adjustment process is performed, and the re-ignition delay time N is continuously increased.
  • the predetermined additional time A to the previous re-ignition delay time N to determine the re-ignition delay time N it is possible to easily reduce the damage of the laundry L due to overheating. The above control of the entire laundry L is uniformly dried.
  • the additional time A it is possible to reduce the temperature difference between the drying of the laundry L and the appropriate temperature difference of the drying of the unbaked portion in the second half of the operation.
  • the peak temperature within the drum 20 even if the time point at which the exhaust gas temperature reaches the upper limit deviates from the limit of the first half of the actual drying operation, since the accumulation of the re-ignition delay time N is performed step by step, the drum 20 at the time of each temperature adjustment process The peak temperature inside will only gradually decrease, and will not have a large impact on the drying performance.
  • step S14 the heating control unit 55 stops the burner 30, and the control unit 5 stops the rotation of the exhaust fan 48a and the drum 20, respectively, thereby ending the main flow.
  • the dryer 1 of the present embodiment has an operation mode in which the temperature of the laundry is lowered when the laundry L is excessively dried to reduce the damage of the laundry.
  • the upper limit temperature was set to about 70 ° C
  • the re-ignition temperature was set to about 40 to 45 ° C
  • the additional time A was set to 5 seconds.
  • the peak temperature in the drum 20 during the drying operation can be reduced by about 10 °C.
  • This experimental value is obtained by THERMO LABEL (registered trademark) which can measure the highest temperature of arrival in the drum 20.
  • the present invention adjusts the temperature in the drum 20 by inserting the re-ignition delay time N, and the heating unit only needs to control ON/OFF, so that the non-adjustable burner 30 can be utilized as the heating unit, particularly in terms of manufacturing cost of the device. It is beneficial.
  • the burner 30 is used as the heating means, but other means may be used as long as the drying air can be heated.
  • the additional time A is added to the re-ignition delay time N.
  • the re-ignition delay time N in the next temperature adjustment process is determined.
  • the re-ignition delay time N is not limited thereto, and may be determined by adding a predetermined variable to the re-ignition delay time N or by multiplying the re-ignition delay time N by a predetermined variable.
  • the re-ignition delay time N may be determined based on a table in which the number of repetitions of the temperature adjustment process and the re-ignition delay time N are correlated.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

一种干衣机（1），该干衣机不管衣物的种类、数量如何，均能在运转后半程使衣物的温度降低，能充分地减少因过热引起的衣物的损伤。干衣机（1）具备：滚筒（20）；给排气单元（4），对滚筒（20）进行烘干用空气的给排气；烧嘴（30），加热烘干用空气；温度传感器（31），检测排气温度；以及加热控制单元（55），进行在排气温度达到上限温度时使烧嘴（30）停止，并在排气温度降低至再点火温度的时间点使烧嘴（30）再运转的温度调整处理，加热控制单元（55）具有延迟时间插入部（56），该延迟时间插入部（56）在从排气温度降低至所述下限温度的时间点到使烧嘴（30）再运转的期间，插入延迟时间，随着一次次间歇性地反复进行温度调整处理，延迟时间逐渐延长。

Description

干衣机 技术领域
本发明涉及一种干衣机，该干衣机不管衣物的种类、数量等如何，均能在烘干过度时使衣物的温度降低，减少对衣物的损伤。
背景技术
以往，已知一种干衣机，通过风扇向投入有要烘干的衣物的滚筒内吹入用烧嘴加热后的烘干用空气，并从主体的背面侧排气(例如专利文献1)。
图4是表示现有的干衣机中的烘干运转的处理顺序的流程图。在专利文献1公开的干衣机中，照例通过控制单元进行如图4所示的处理，当按下开始按钮时，开始运转，进入步骤T1。
<步骤T1>
在步骤T1中，控制单元使滚筒以及风扇开始旋转。由此，开始对滚筒进行烘干用空气的给排气。
<步骤T2>
在步骤T2中，控制单元使烧嘴点火。由此，开始对滚筒进行高温的烘干用空气的给气。
<步骤T3>
在步骤T3中，控制单元开始进行运转时间的计数。
<步骤T4>
在步骤T4中，控制单元判断运转时间是否达到了结束时间，并判断是否要结束运转。在判断要结束运转的情况下，进入步骤T10；在判断不结束运转的情况下，进入步骤T5。
<步骤T5>
在步骤T5中，控制单元判断排气温度是否达到了上限温度。在判断排气温度达到了上限温度的情况下，进入步骤T6；在判断排气温度未达到上限温度的情况下，返回步骤T4。
<步骤T6>
在步骤T6中，控制单元使烧嘴停止。由此，变成向滚筒内提供未被加热的几近常温的烘干用空气，滚筒内的温度降低。
<步骤T7>
在步骤T7中，控制单元判断运转时间是否达到了结束时间，并判断是否要结束运转。在判断要结束运转的情况下，进入步骤T10；在判断不结束运转的情况下，进入步骤T8。
<步骤T8>
在步骤T8中，控制单元判断排气温度是否达到了再点火温度。在判断达到了再点火温度的情况下，进入步骤T9；在判断未达到再点火温度的情况下，返回步骤T7。
<步骤T9>
在步骤T9中，控制单元使烧嘴再点火，进入步骤T4。由此，恢复对滚筒提供高温的烘干用空气，滚筒内的温度再次上升。
<步骤T10>
在步骤T10中，控制单元使烧嘴停止，并且分别使风扇以及滚筒停止旋转。由此结束主流程。
如此，现有的干衣机通过反复进行如下的处理来抑制滚筒内的温度的异常上升，抑制由过热引起的衣物的损伤：当来自滚筒的排气温度达到规定的上限温度时，使烧嘴(热源)停止以降低滚筒内的温度，之后，当排气温度降低至规定的再点火温度时，使烧嘴再点火。
然而，在上述的烘干运转中，即使排气温度达到上限温度，即衣物中所含的水分减少，至少一部分衣物基本上干燥并达到了烘干过度状态之后，当排气温度降低至再点火温度时，烧嘴也会立刻被再点火，因此，滚筒内保持高温， 衣物的表面温度一直上升。这样的状态会带来衣物的损伤，上述进行现有的烘干运转的干衣机在减少由过热引起的衣物的损伤方面尚有改善的余地。
针对该问题，可以考虑进行如下的控制：在烧嘴反复进行灭火/点火的运转的后半程，降低上限温度，在滚筒内的温度上升过度之前，使烧嘴停止。然而，特别是自助洗衣店喜欢使用的干衣机基于其特性，干衣机无法辨别收容于滚筒内的衣物的种类、重量等，难以确认何时为运转后半程，因此难以采用该控制。
现有技术文献
专利文献
专利文献1：日本特开平9-290095号公报
发明内容
发明所要解决的问题
本发明的目的在于有效地解决这样的问题，其目的在于提供一种干衣机，该干衣机不管衣物的种类、数量等如何，均能在运转后半程降低衣物的温度，能在充分地减少由过热引起的衣物的损伤的同时，均匀地烘干全体衣物。
用于解决问题的方案
本发明是鉴于以上的问题，采用了下述方案的发明。
即，本发明的干衣机的特征在于，具备：滚筒，能收容衣物；给排气单元，对所述滚筒进行烘干用空气的给排气；加热单元，加热给气至所述滚筒的烘干用空气；排气温度检测单元，检测从所述滚筒排出的烘干用空气的温度；以及加热控制单元，进行如下的温度调整处理：当通过所述排气温度检测单元检测到的排气温度达到规定的上限温度时，使所述加热单元停止，并在所述排气温度降低至规定的下限温度的时间点之后，使所述加热单元再运转，所述加热控制单元具有延迟时间插入部，该延迟时间插入部在从所述排气温度降低至所述下限温度的时间点到使所述加热单元再运转的期间，插入延迟时间，随着一次次间歇性地反复进行所述温度调整处理，所述延迟时间逐渐延长。
尤其优选通过将规定的追加时间追加至上一次的所述延迟时间来决定所述 延迟时间。
进一步优选对所述延迟时间设置上限值，当反复进行所述温度调整处理而使所述延迟时间达到上限值时，以该延迟时间来进行之后的所述温度调整处理。
此外，优选所述加热单元是不具有火力调整功能的非调整式烧嘴。
发明效果
根据以上所说明的本发明，由加热单元加热后的烘干用空气通过给排气单元被供给至滚筒将衣物烘干，并且，将通过排气温度检测单元检测到的排气温度达到上限温度的时间点设为烘干运转的前后半程的大致界限，不以排气温度达到上限温度的时间点为基准，而是将排气温度降低至下限温度的时间点作为加热单元再运转的基准，由此，无需严密地推定要烘干的衣物的种类、数量等，就能在烘干运转的后半程，通过加热控制单元进行温度调整处理。在该温度调整处理中，通过延迟时间插入部，插入随着一次次间歇性地反复进行温度调整处理而逐渐延长的延迟时间，因此，能通过未被加热的烘干用空气继续进行衣物的烘干，并且能使滚筒内的温度降低至比上一次温度调整处理时更低的温度。因此，不管要烘干的衣物的种类、数量等如何，都能在烘干运转的后半程使每次温度调整处理的滚筒内的峰值温度逐渐降低，从而降低烘干过度状态下的衣物的温度，能在充分地减少因过热引起的衣物的损伤的同时，均匀地烘干全体衣物。
特别是，根据通过将规定的追加时间追加至上一次的所述延迟时间来决定所述延迟时间的本发明，能轻易地实现能在充分地减少因过热引起的衣物的损伤的同时均匀地烘干全体衣物的上述控制。
进一步地，根据对所述延迟时间设置上限值的本发明，能防止在烘干运转的后半程衣物温度过度降低，能在不陷入烘干不充分的状况的情况下确保所需的烘干性能。
此外，根据所述加热单元为非调整式烧嘴的本发明，与使用调整式烧嘴的情况相比，能降低制造成本。
附图说明
图1是示意地表示本发明的一实施方式的干衣机的图。
图2是表示同一干衣机的结构的框图。
图3是表示同一干衣机中的烘干运转的处理顺序的流程图。
图4是表示现有的干衣机中的烘干运转的处理顺序的流程图。
附图标记说明
1：干衣机；4：给排气单元；20：滚筒；30：烧嘴(加热单元)；31：温度传感器(排气温度检测单元)；55：加热控制单元；56：延迟时间插入部；A：追加时间；L：衣物；N：再点火时延迟时间(延迟时间)。
具体实施方式
以下，参照附图对本发明的一实施方式加以说明。
图1是示意地表示本发明的一实施方式的干衣机1的图，图1(a)是干衣机1的主视图，图1(b)是干衣机1的侧视图。图2是表示干衣机1的结构的框图。
本实施方式的干衣机1包括：装置主体10、滚筒20以及滚筒壳体21、滚筒电机23、烧嘴30、给排气单元4、温度传感器(热敏电阻)31、以及控制单元5(参照图2)，特别适合用于自助洗衣店。
就装置主体10而言，其内部通过上侧隔板11和下侧隔板12而被隔绝，在其上部形成有燃烧室13，在其中间部形成有烘干室14，在其下部形成有通风室15以及风扇电机室16。
滚筒20在烘干室14中设置于圆筒状的滚筒壳体21内，轴心为干衣机主体1的前后方向，并与滚筒壳体21同心配置。此外，滚筒20比滚筒壳体21的直径小一些并且在圆周面具有许多未图示的小孔，反复进行正向旋转和用于松开衣物的逆向旋转。这种滚筒20可收容要烘干的衣物L。
在滚筒壳体21的上部偏左的位置形成有吸气口21a(参照图1(a))，吸气口21a经由短尺寸的通风管道17与后述的燃烧室13连通。在滚筒壳体21的下 部偏右的位置形成有排气口21b(参照图1(a))。滚筒20的前侧开口部能由门22开闭自如地密闭。
滚筒电机23安装于装置主体10的后表面侧上部。滚筒20通过滚筒电机23的旋转力来旋转驱动。
作为加热单元的烧嘴30设置于燃烧室13，经由所述小孔加热给气至滚筒20内的烘干用空气。此外，烧嘴30是不具有火力调整功能的非调整式烧嘴。烧嘴30由图2所示的燃气阀30b给气/断气。此外，在烧嘴30的附近设有点火器30a(参照图2)。
给排气单元4对滚筒20进行烘干用空气的给排气，并具有：给排路40、排风扇48a以及风扇电机48b。
给排路40由燃烧室13、通风管道17、滚筒壳体21、与排气口21b对置地形成于下侧隔板12的通气口40b、通风室15以及风扇电机室16构成。
通风室15形成于下侧隔板12的下方，通过大致垂直配置的隔板44与风扇电机室16隔绝。此外，横跨上端部固定于下侧隔板12的屏蔽板42的下端部和隔板44的下端部，配置有空气过滤器45，并且在隔板44的偏右的位置处形成有通气口44a(参照图1(a))。
在风扇电机室16配置有位于风扇隔板47的前表面侧的排风扇48a和位于风扇隔板47的后表面侧并使排风扇48a旋转的风扇电机48b。在风扇隔板47的偏左侧的上部形成有排风口47a(参照图1(a))。
作为排气温度检测单元的温度传感器31检测从滚筒20排气出来的烘干用空气的温度(排气温度)，所述温度传感器31设置于排风扇48a的附近即风扇隔板47的排气口47a。虽然难以实时测量运转中的滚筒20内的温度，但通过使用温度传感器31，能间接地实时测量滚筒20内的温度。
这种干衣机1的动作由包括微电脑的控制单元5(参照图2)来控制。控制单元5具备：加热控制单元55、计时器51、ROM53以及RAM54，通过由微电脑来执行存储于ROM53的程序(例如后述的温度调整处理)，从而进行预先设定的运转动作。RAM54临时存储有执行上述程序时所使用的数据(例如后述的再点火延迟时间)。
控制单元5能将风扇电机驱动信号输出给风扇电机48b，并且能将滚筒电机驱动信号输出给滚筒电机23。
加热控制单元55能将点火信号输出给点火器30a，并且能将燃气供给信号输出给燃气阀30b。
此外，加热控制单元55进行如下的温度调整处理：当温度传感器31检测到的排气温度达到规定的上限温度时使烧嘴30停止，并在排气温度降低至规定的下限温度即再点火温度的时间点之后使烧嘴30再运转。在本实施方式中，上限温度预先设定为例如70℃左右，再点火温度预先设定为例如40～45℃左右。
进而，加热控制单元55具有延迟时间插入部56，该延迟时间插入部56在从排气温度降低至再点火温度的时间点到烧嘴30再运转的期间，插入作为延迟时间的再点火延迟时间，随着一次次间歇性地反复进行温度调整处理，再点火时间逐渐延长。
如此，本实施方式的干衣机1具备：滚筒20，可收容衣物L；给排气单元4，对滚筒20进行烘干用空气的给排气；烧嘴30，作为加热单元，加热给气至滚筒20的烘干用空气；温度传感器31，作为排气温度检测单元，检测从滚筒20排出的烘干用空气的温度；加热控制单元55，进行如下的温度调整处理：当通过温度传感器31检测到的排气温度达到规定的上限温度时使烧嘴30停止，并在排气温度降低至作为规定的下限温度的再点火温度的时间点之后使烧嘴30再运转，加热控制单元55具有延迟时间插入部56，该延迟时间插入部56在从排气温度降低至再点火温度的时间点到使烧嘴30再运转的期间，插入作为延迟时间的再点火延迟时间N，随着一次次间歇性地反复进行温度调整处理，再点火时间N逐渐延长。
当采用这样的结构时，由烧嘴30加热后的烘干用空气能通过给排气单元4给气至滚筒20内将衣物L烘干，并且，将排气温度达到上限温度的时间点设为烘干运转的前后半程的大致界限，不以排气温度达到上限温度的时间点为基准，而是将排气温度降低至再点火温度的时间点作为烧嘴30再点火的基准，由此，无需严密地推定投入滚筒20内的衣物L的种类、重量，就能在烘干运转的后半程，通过加热控制单元55进行温度调整处理。在该温度调整处理中，通过延迟时间插入部56，插入随着一次次间歇性地反复进行温度调整处理而逐渐延长的 再点火延迟时间N，因此，能通过未被加热的烘干用空气继续进行衣物L的烘干，并且能使滚筒20内的温度降低至比上一次温度调整处理时更低的温度。因此，不管要烘干的衣物L的种类、数量等如何，都能在烘干运转的后半程使每次温度调整处理的滚筒20内的峰值温度逐渐降低，从而能平稳地降低烘干过度状态下的衣物L的温度。与现有的持续保持高温运转的方法相比，能在充分地减少因过热引起的衣物L的损伤的同时，均匀地烘干全体衣物L。
而且，在发挥这种效果时，不需要新的传感器类，可以采用现有的机械结构，不用花费成本。
需要说明的是，以达到上限温度为界限，作为降低衣物温度的其他方法，可以考虑从排气温度达到上限温度的时间点开始，降低该上限温度本身。然而，该方法由于在烧嘴30再点火之后，排气温度再次达到上限温度的时间会提前，因此，在整个运转过程中，烧嘴30点火/灭火的次数增加，在机器的耐久性方面，会起到不利的作用。
在本发明中，与上述方法相比，烧嘴30点火/灭火的次数减少，因此，在机器的耐久性方面也是有利的。
此外，如此，在排气温度初次达到上限温度的时间点，衣物L的表面呈几乎烘干的状态，相比于湿润部分而言，已经烘干的部分更容易受到热损伤，现有技术并未注意到这一点，并且也未提及如下的创意：在很有可能还存在尚未被烘干的部分的状态下插入再点火延迟时间N，使滚筒20内的温度降低。
图3是表示干衣机1中的烘干运转的处理顺序的流程图。以下，使用图3对烘干运转的处理顺序进行具体说明。
打开门22，将要烘干的衣物L投入滚筒20内，并在关闭门22之后，按下未图示的开始按钮，开始主流程。
<步骤S1>
在步骤S1中，控制单元5向滚筒电机23输出滚筒电机驱动信号，使滚筒20开始旋转，并且向风扇电机48b输出风扇电机驱动信号，使排风扇48a开始旋转。由此，将风扇电机室16内的空气向装置外部排出，空气从燃烧室13朝向风扇电机室16流向给排路40，开始对滚筒20进行烘干用空气的给排气。
<步骤S2>
在步骤S2中，加热控制单元55向燃气阀30b输出燃气供给信号，使燃气阀30b打开，并且向点火器30a输出点火信号，使烧嘴30点火。由此，开始向滚筒20提供高温的烘干用空气。
<步骤S3>
在步骤S3中，控制单元5将再点火延迟时间N设定为0(秒)。
<步骤S4>
在步骤S4中，控制单元5使计时器51开始运转时间的计数。
<步骤S5>
在步骤S5中，控制单元5基于计时器51的计数值，判断运转时间是否达到了结束时间，并判断是否药结束运转。在判断要结束运转的情况下，进入步骤S14，在未判断不结束运转的情况下，进入步骤S6。
<步骤S6>
在步骤S6中，控制单元5判断通过温度传感器31检测到的排气温度是否达到了上限温度。在判断排气温度已达到上限温度的情况下，进入步骤S7，在判断排气温度未达到上限温度的情况下，返回步骤S5。需要说明的是，当滚筒20内的水分量较多时，即使提供高温的烘干用空气，热量也会被用于水的蒸发，难以使滚筒20内的温度上升，衣物的量、衣物所含的水分量越多，排气温度达到上限温度所需的时间越长。此外，虽然因衣物L的质地、数量等不同而会有所差异，但通常在排气温度第一次达到上限温度的时间点，即使烘干了衣物L的表面，内部也还是湿润的状态。
<步骤S7>
在步骤S7中，加热控制单元55停止燃气阀30b向烧嘴30的燃气供给，使烧嘴30停止(灭火)。
<步骤S8>
在步骤S8中，控制单元5基于计时器51的计数值，判断运转时间是否达到了结束时间，并判断是否要结束运转。在判断要结束运转的情况下，进入步 骤S14，在判断不结束运转的情况下，进入步骤S9。
<步骤S9>
在步骤S9中，控制单元5判断通过温度传感器31检测到的排气温度是否已降低至再点火温度。在判断排气温度已降低至再点火温度的情况下，进入步骤S10，在判断排气温度未降低至再点火温度的情况下，返回步骤S8。
<步骤S10>
在步骤S10中，延迟时间插入部56使燃气供给信号以及点火信号的输出等待再点火延迟时间N。
<步骤S11>
在步骤S11中，加热控制单元55向燃气阀30b输出燃气供给信号，并且向点火器30a输出点火信号，使烧嘴30再点火。
<步骤S12>
在步骤S12中，控制单元5判断再点火延迟时间N是否为120(秒)以上。在判断再点火延迟时间N为120(秒)以上的情况下，进入步骤S5，在判断再点火延迟时间N不为120(秒)以上的情况下，进入步骤S13。
在此，120(秒)是再点火延迟时间N的上限值。如此，由于对再点火延迟时间N设定了上限值，当反复进行温度调整处理，再点火延迟时间N达到上限值时，以该再点火延迟时间N来进行之后的温度调整处理，因此，防止了衣物温度被过度降低，在不陷入烘干不充分的情况下确保了所需的烘干性能。需要说明的是，再点火延迟时间N的上限值只要能发挥本发明效果，就不限于120秒。
<步骤S13>
在步骤S13中，控制单元5以5(秒)为追加时间A追加至再点火时延迟时间N。由此，直到再点火延迟时间N达到上限值，每当进行温度调整处理，都对再点火延迟时间N累计追加时间，使再点火延迟时间N持续增加。如此，通过将规定的追加时间A追加至上一次的再点火延迟时间N来决定再点火延迟时间N，因此能轻易地实现能在充分地减少因过热引起的衣物L的损伤的同时 均匀地烘干全体衣物L的上述控制。进而，通过将追加时间A设为5秒左右，从而能在运转后半程，以能兼顾衣物L损伤的减少和未烘干部分的烘干的合适的温度差，降低每次温度调整处理时的滚筒20内的峰值温度。此外，即使排气温度达到上限的时间点偏离了实际的烘干运转的前后半程的界限，由于再点火延迟时间N的累计是一步步进行的，因此，每次温度调整处理时的滚筒20内的峰值温度只会逐渐降低，不会对烘干性能造成较大的影响。
<步骤S14>
在步骤S14中，加热控制单元55使烧嘴30停止，并且控制单元5分别使排风扇48a以及滚筒20停止旋转，由此，结束主流程。
如此，本实施方式的干衣机1具有在衣物L被烘干过度时使衣物温度降低从而减少衣物的损伤的运转模式。需要说明的是，在干衣机1中，将上限温度设定为70℃左右、再点火温度设定为40～45℃左右、追加时间A设定为5秒来进行的实验与进行图4所示的现有的烘干运转的情况相比，能使烘干运转中的滚筒20内的峰值温度降低10℃左右。该实验数值通过可测量滚筒20内的最高到达温度的THERMO LABEL(注册商标)来获得。
需要说明的是，作为在烘干过度时使衣物温度降低的其他方法，也可以考虑使用能分多个阶段调整火力的火力调整式烧嘴，通过在排气温度达到上限温度之后，将烧嘴的火力调整变小，从而使衣物温度降低。
在该情况下，随着烧嘴的火力调整，也能使点火/灭火的次数被抑制得较少，在机器的耐久性方面问题少，但使用调整式烧嘴会导致设备的制造成本上升。本发明通过插入再点火延迟时间N来调整滚筒20内的温度，加热单元只需控制ON/OFF即可，因此能利用非调整式烧嘴30来作为加热单元，特别是在设备的制造成本方面是有利的。
以上，对本发明的一实施方式进行说明，但各部分的具体结构并不仅限于上述的实施方式。
例如，在本实施方式中，使用了烧嘴30作为加热单元，但只要能加热烘干用空气，也可以使用除此以外的其他装置。
此外，虽然在本实施方式中通过将追加时间A追加至再点火延迟时间N来 决定下一次的温度调整处理中的再点火延迟时间N，但并不限定于此，也可以通过对再点火延迟时间N追加规定的变量或以规定的变量乘以再点火延迟时间N来决定下一次的再点火延迟时间N。此外，也可以基于将温度调整处理的重复次数和再点火延迟时间N关联起来的表单来决定再点火延迟时间N。
其他结构也可以在不脱离本发明的技术精神的范围内进行各种变形。

Claims (4)

  1. 一种干衣机，其特征在于，具备：
    滚筒，能收容衣物；
    给排气单元，对所述滚筒进行烘干用空气的给排气；
    加热单元，加热供给至所述滚筒的烘干用空气；
    排气温度检测单元，检测从所述滚筒排出的烘干用空气的温度；以及
    加热控制单元，进行如下的温度调整处理：当通过所述排气温度检测单元检测到的排气温度达到规定的上限温度时，使所述加热单元停止，并在所述排气温度降低至规定的下限温度的时间点之后，使所述加热单元再运转，
    所述加热控制单元具有延迟时间插入部，该延迟时间插入部在从所述排气温度降低至所述下限温度的时间点到使所述加热单元再运转的期间，插入延迟时间，随着一次次间歇性地反复进行所述温度调整处理，所述延迟时间逐渐延长。
  2. 根据权利要求1所述的干衣机，其特征在于，通过将规定的追加时间追加至上一次的所述延迟时间来决定所述延迟时间。
  3. 根据权利要求2所述的干衣机，其特征在于，对所述延迟时间设置上限值，当反复进行所述温度调整处理而使所述延迟时间达到上限值时，以该延迟时间来进行之后的所述温度调整处理。
  4. 根据权利要求1～3中任一项所述的干衣机，其特征在于，所述加热单元是不具有火力调整功能的非调整式烧嘴。
PCT/CN2016/098310 2015-09-09 2016-09-07 干衣机 WO2017041712A1 (zh)

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