KR102313642B1 - Clothes Dryer - Google Patents

Abstract

To provide a clothes dryer capable of suppressing the clothes in the drum from being dried at excessively high temperatures and preventing the clothes in the drum from being damaged.
After the start of the drying operation, the control device executes the closing correction processing (S50 to S66), and sets each correction value according to the ejection temperature. Specifically, each correction value is set to a value greater than 0 when the ejection temperature is in the range of 140°C or higher (S52, S56, and S62). Then, when a predetermined period has elapsed from the start of the drying operation, the control device calculates each set value serving as a reference for turning on/off the burner based on each correction value set at the time when the predetermined period has elapsed. Then, thereafter, the drying operation is continued according to each determined set value. That is, when the ejection temperature at the time when the predetermined period has elapsed is 140 DEG C or higher, each set value is lower than the initial value.

Description

Clothes Dryer {Clothes Dryer}

The present invention relates to a clothes dryer.

Patent Document 1 discloses a drum for accommodating clothes, a burner for heating air sent from the outside into the drum, and a blowout temperature sensor for detecting a blowout temperature that is the temperature of the air before being sent into the drum after being heated by the burner; , a clothes dryer having a control device is provided. In this clothes dryer, a lint filter for preventing seams (lint) generated in the drum from being discharged to the outside is provided in an exhaust path through which air is discharged from the inside of the drum to the outside.

In general, when the lint filter is closed by the lint, the amount of air passing through the drum decreases. As a result, the ejection temperature becomes higher than before the lint filter is closed. In the clothes dryer of Patent Document 1, the control device operates the fan and burner to monitor the blowout temperature detected by the blowout temperature sensor after starting the drying operation, determines whether the lint filter is closed, and closes it. Notification operation is performed when it is.

JP 1994-319898 A

In a situation in which the lint filter is closed, the lint filter may not be cleaned promptly and the drying operation may continue as it is. In such a case, the ejection temperature becomes high, and accordingly, the clothes in the drum are dried at an excessively high temperature and there is a risk of being damaged.

Disclosed herein is a clothes dryer capable of suppressing the clothes in the drum from being dried at excessively high temperatures and preventing the clothes in the drum from being damaged.

The clothes dryer disclosed in this specification includes a drum for accommodating clothes, a fan for sending air into the drum from the outside, a burner for heating the air sent into the drum, and air after being heated by the burner before being sent into the drum. A jet temperature sensor for detecting a jet temperature, which is a temperature of After starting the drying operation by operating the burner and the fan, the control device stops the burner when the relational temperature detected by the relational temperature detecting means exceeds a predetermined off threshold, and after stopping the burner , when the relational temperature detected by the relational temperature detecting means is lower than a predetermined on threshold lower than the off threshold, the burner is operated again and a predetermined period has elapsed after starting the drying operation When the temperature detected by the blowout temperature sensor of In the specific case, which is at least one case, the off threshold is lowered.

In the above clothes dryer, after the start of the drying operation, the burner is stopped when the relative temperature exceeds a predetermined off threshold, and when the relative temperature falls below the predetermined on threshold after stopping the burner, the burner By operating again, the relational temperature is maintained at a temperature above the on threshold and below the off threshold, and the relational temperature is suppressed from being maintained at an excessive temperature. In addition, in the above-mentioned clothes dryer, when the blowout temperature detected by the blowout temperature sensor exceeds a predetermined blowout temperature threshold when a predetermined period has elapsed after the start of the drying operation, and when the drying operation is started In the specific case of at least one of the cases in which the amount of rise of the ejection temperature from . For this reason, for example, the ejection temperature is set to exceed a predetermined ejection temperature threshold value (or/and ejection temperature) due to circumstances such as the closing of a lint filter installed in the exhaust path through which air is discharged from the inside of the drum to the outside. In the case where the amount of rise of . For this reason, for example, the ejection temperature exceeds a predetermined ejection temperature threshold due to circumstances such as closing of the lint filter (or/or causing the increase in ejection temperature to exceed the predetermined increase amount threshold) In this case, it is possible to suppress the relative temperature from rising excessively. Therefore, according to the above-mentioned clothes dryer, it is possible to suppress the clothes in the drum from being dried at an excessively high temperature and to prevent the clothes in the drum from being damaged.

To provide a clothes dryer capable of suppressing the clothes in the drum from being dried at excessively high temperatures and preventing the clothes in the drum from being damaged.

After the start of the drying operation, the control device executes the closing correction processing (S50 to S66), and sets each correction value according to the ejection temperature. Specifically, each correction value is set to a value larger than 0 when the ejection temperature is in the range of 140°C or higher (S52, S56, S62). Then, when a predetermined period has elapsed from the start of the drying operation, the control device calculates each set value serving as a reference for on/off of the burner based on the respective correction values set at the time when the predetermined period has elapsed. Then, thereafter, the drying operation is continued according to each determined set value. That is, when the ejection temperature at the time when the predetermined period has elapsed is 140 DEG C or higher, each set value is lower than the initial value.

Fig. 1 is a diagram schematically showing the configuration of a clothes dryer 2;
Fig. 2 is a flowchart showing main processing by the control device 70;
Fig. 3 is a flowchart showing closure correction processing by the control device 70;
Fig. 4 is a flowchart showing a course determination process and a clothing temperature temperature control process by the control device 70;
Fig. 5 is a flowchart showing an exhaust temperature temperature control process by the control device 70;
Fig. 6 is a graph showing the transition of clothes temperature, exhaust temperature, ejection temperature, and electrode detection state when a drying operation is performed by the clothes dryer of a comparative example;
Fig. 7 is a graph showing the transition of the clothes temperature, the exhaust temperature, the ejection temperature, and the electrode detection state in the case where the drying operation is performed by the clothes dryer 2 of the embodiment;

The main features of the embodiments described below are enumerated. In addition, the technical elements described below are independent technical elements, each exhibiting technical usefulness individually or in various combinations, and are not limited to the combinations described in the claims at the time of filing.

(Feature 1) It is preferable to include the case where the relational temperature detected by the relational temperature detecting means exceeds the off threshold before a predetermined period elapses after the start of the drying operation and the specific case.

For example, in the case where drying operation is temporarily stopped according to a user's instruction and drying operation is started again, even if a predetermined period has elapsed after the start of drying operation, the relative temperature exceeds the off threshold. situations can arise. According to the above configuration, even when such a situation occurs, the off boundary value can be made low without elapse of a predetermined period. Accordingly, it is possible to appropriately suppress damage to the clothes in the drum regardless of the condition of the drying operation.

(Feature 2) In a specific case, it is preferable that the control device further lowers the ON threshold.

According to this configuration, the clothes dryer can lower the on threshold as well as the off threshold. Therefore, it is suppressed that the number of repetitions of operation and stop of the burner becomes excessively large, and the temperature in the drum can be appropriately maintained at a temperature suitable for drying clothes.

(Feature 3) It is preferable that the relational temperature includes the exhaust temperature, which is the temperature of the air after it has passed through the drum. The relational temperature detecting means preferably includes an exhaust temperature sensor for detecting the exhaust temperature. The off-limit value preferably includes a predetermined off-exhaust temperature threshold that is a threshold value of the exhaust temperature. The on threshold value preferably includes a predetermined on exhaust temperature threshold value that is a threshold value of an exhaust temperature lower than the off exhaust temperature threshold value.

According to this configuration, the clothes dryer can lower the off-exhaust temperature threshold value in a specific case. Accordingly, it is possible to suppress the clothes in the drum from being curled at an excessively high temperature due to the excessive rise in the exhaust temperature, and it is possible to suppress damage to the clothes in the drum.

(Feature 4) It is preferable that the relational temperature includes the clothing temperature, which is the temperature of the clothes in the drum. The relational temperature detecting means preferably includes a clothes temperature sensor for detecting the clothes temperature. The off boundary value preferably includes a predetermined off clothing temperature boundary value that is a boundary value of the clothing temperature. The on threshold value preferably includes a predetermined on clothing temperature threshold value that is a threshold value of a clothing temperature lower than the off clothing temperature threshold value.

According to this configuration, the clothes dryer can lower the off-clothes temperature threshold value in a specific case. Therefore, by suppressing an excessive increase in the temperature of the clothes, it is possible to suppress the clothes in the drum from being curled at an excessively high temperature, and to suppress damage to the clothes in the drum.

(Example)

(Configuration of clothes dryer 2; Fig. 1)

As shown in Fig. 1, the clothes dryer 2 of this embodiment includes a cylinder 4, a door 6, a drum 10, a fan 14, a burner 30, a control device ( 70) is provided.

The cylinder 4 is the main body of the clothes dryer 2 . Each of the above elements of the clothes dryer (2) is accommodated in a cylinder (4). A display unit and an operation unit (not shown) are provided on the front surface (left side of Fig. 1) of the cylindrical body 4 . The display unit is a display on which various information is displayed. The operation unit includes a plurality of buttons. The user can input various instructions to the clothes dryer 2 through the operation unit. The door 6 is a door provided on the front surface of the cylindrical body 4 .

The drum 10 is a container for accommodating the clothes C to be dried. The drum 10 is rotated by a motor 12 . A front opening 10a is opened on the front side of the drum 10 and is closed by a door 6 . The user of the clothes dryer 2 can open the door 6 and put the clothes C into the drum 10 through the front opening 10a and take out the clothes C from the drum 10 at the same time. have. Further, on the front side of the drum 10, on the side of the front opening 10a, an air outlet 36 for sending the air after being heated by the burner 30 into the drum 10 is also opened.

In the drum (10), an electrode (50) and a clothing temperature thermistor (60) are provided. The electrode 50 detects moisture contained in the clothes C. The clothes temperature thermistor 60 detects the temperature of the clothes C in the drum 10 (hereinafter referred to as "clothes temperature"). According to the operation of the drum 10, the clothes C come into contact with the electrode 50 and the clothes temperature thermistor 60, so that the electrode 50 detects moisture in the clothes C, and the clothes temperature thermistor 60 Clothing temperature can be detected. In addition, in the drum 10, a weight sensor not shown in the figure is also provided. The weight sensor detects the weight of the clothes C in the drum 10 .

Further, a rear opening 10b is opened on the rear side of the drum 10 (right side in Fig. 1). The rear opening 10b is closed by the lint filter 16 . The lint filter 16 is a filter for collecting seams (lint) generated from the clothes C or the like in the drum 10 . The lint filter 16 allows air to pass through, but traps seams contained in the air without passing through it.

The fan 14 is arranged on the rear side of the drum 10 . By operating the fan 14, the air in the drum 10 is sent from the outside of the cylinder 4 into the drum 10 (refer to arrows V1 to W3 in Fig. 1), and the air in the drum 10 is removed from the back side of the cylinder 4 ( It can be discharged toward the exhaust port 20 formed on the upper surface near the right side in Fig. 1 (refer to arrows V4 to V6 in Fig. 1). The exhaust temperature thermistor 22 is installed in the vicinity of the exhaust port 20, and measures the temperature of the air blown out from the inside of the drum 10 toward the exhaust port 20 (hereinafter referred to as "exhaust temperature" in some cases). a thermistor that detects

The burner 30 is disposed below the drum 10 . The burner 30 uses the combustion heat obtained by burning the gas to heat the air sent from the outside through the jet port 36 into the drum 10 (refer to arrow W3). A fuel gas is supplied to the burner 30 through a gas supply pipe 32 . The gas supply pipe 32 is provided with a solenoid valve 34 for opening and closing the gas supply pipe 32 . A jet temperature thermistor 40 is provided between the burner 30 and the jet port 36 . The blowout temperature thermistor 40 is the temperature of the air after being heated by the burner 30 (that is, the air sent into the drum 10 from the jetting port 36 (refer to arrow W3)) (hereinafter referred to as “blowing temperature”). ) is a thermistor that detects

The control device 70 is electrically connected to each component in the cylinder 4 of the clothes dryer 2 described above, and controls the operation of each component.

(Operation of clothes dryer (2))

Next, the operation of the clothes dryer 2 of this embodiment will be described. When the user puts the clothes C into the drum 10 and inputs a predetermined drying start operation through the operation unit (not shown) of the clothes dryer 2, the clothes dryer 2 executes the drying operation. do. While the drying operation is being executed, the control device 70 executes each process shown in Figs.

(Main processing; Fig. 2)

FIG. 2 shows a flowchart of the main processing executed by the control device 70 during the drying operation of the clothes dryer 2 . In the control device 70, when a drying start operation is input from the operation unit, the control device 70 starts the main processing shown in FIG. In S10 , the control device 70 operates the motor 12 and the fan 14 while operating the burner 30 . Thereby, the drying operation is started. In the following, operating the burner 30 (that is, putting it in a combustion state) is called "turning on the burner 30", and stopping the burner 30 (that is, putting it in a extinguished state) is "burner 30" Turn it off.”

Next, the control device 70 sets the on/off duty at this time to the pattern (1). Here, “on/off duty” refers to a period in which the burner 30 is turned on (hereinafter referred to as an “on period”) and a period in which the burner 30 is turned off within a predetermined unit period (60 seconds in the present embodiment). (hereinafter referred to as "off period") is the case of the ratio. As will be described in detail later, after starting the drying operation at S10 and after the exhaust temperature exceeds a predetermined exhaust temperature off-set value, the controller 70 controls the burner 30 according to the on-off duty. Exhaust temperature control control (refer to Fig. 5) to switch on/off is performed. In the on-off duty, there are a plurality of preset patterns (refer to Fig. 5). For example, in the pattern 1, the ON period is 50 seconds and the OFF period is 10 seconds among 60 seconds which are unit periods. The pattern (2) has an on period of 45 seconds and an off period of 15 seconds. The pattern 3 has an on period of 40 seconds and an off period of 20 seconds. In this way, each pattern is set so that the ON period becomes shorter and the OFF period becomes longer each time the numerical value of the pattern advances by one step. In S12, the control device 70 sets the on-off duty to the pattern (1).

Subsequently, at S14, the control device 70 temporarily determines the operation course of the drying operation based on the weight of the clothes C in the drum 10 and the dehydration degree of the clothes C, and whether the result is rated. decide whether or not The weight of the clothes C is detected by a weight sensor (not shown) in the drum 10 . The dehydration degree of the clothes C is calculated based on the frequency at which the electrode 50 detects the moisture in the clothes C. When the weight and dehydration degree of the clothing C are within the predetermined rated range, the control device 70 determines that the result of the provisional determination of the driving course is the rated one. In this case, the control device 70 determines that it is YES in S14, and proceeds to S16. On the other hand, when the weight and dehydration of the clothes (C) are outside the predetermined rated range (for example, when the clothes (C) are too many or too few (excessive, small amounts), the drying of the clothes (C) is already significant In the case of progressing to a certain degree (high dehydration, etc.), the control device 70 determines that the provisional determination result of the driving course is not rated. In this case, the control device 70 determines that it is NO in S14, and proceeds to S18.

In S16 and S18, the control device 70 sets the initial values of the clothes temperature off initial value, the clothes temperature on initial value, the exhaust temperature off initial value, and the exhaust temperature on initial value. Here, the "clothes temperature off initial value" is an initial set value of the clothing temperature, which is a reference for turning off the burner 30 after the start of the drying operation. The “initial value of clothing temperature temperature” is an initial set value of the clothing temperature, which is a reference for turning on the burner 30 again after the burner 30 is turned off. The "exhaust temperature off initial value" is an initial set value of the exhaust temperature serving as a reference for turning off the burner 30 after the start of the drying operation. The “exhaust temperature initial value” is an initial set value of the exhaust temperature serving as a reference for turning on the burner 30 again after the burner 30 is turned off. In the case of S16 and the case of S18, the value of each set initial value is different.

In S16, the clothing temperature off initial value and the clothing temperature on initial value are set to 90°C and 80°C, respectively. Then, the exhaust temperature off initial value and the exhaust temperature on initial value are set to 72°C and 71°C, respectively.

On the other hand, in S18, the clothing temperature off initial value and the clothing temperature on initial value are set to 85°C and 75°C, respectively. Then, the exhaust temperature off initial value and the exhaust temperature on initial value are set to 70°C and 68°C, respectively.

Subsequently, in S20, the control device 70 initially sets each correction value of the clothes temperature off correction value, the clothes temperature on correction value, the exhaust temperature off correction value, and the exhaust temperature temperature correction value. At the time of S20, any correction value is set to zero. Here, the “clothing temperature off correction value” refers to the clothing temperature off setting value, which is a set value of the clothing temperature that is a reference for turning off the burner 30 after the start of the drying operation by correcting the above initial clothing temperature off value. value to be calculated. In addition, the “clothing temperature temperature correction value” refers to the clothing temperature temperature setting value, which is a reference value for turning on the burner 30 again after the burner 30 is turned off by correcting the initial clothing temperature temperature. It is a value for calculating the set value. In addition, the "exhaust temperature off correction value" corrects the exhaust temperature off initial value, and calculates the exhaust temperature off set value, which is a set value of the exhaust temperature as a reference for turning off the burner 30 after the start of the drying operation. value for In addition, the “exhaust temperature temperature correction value” refers to the exhaust temperature temperature, which is a set value of the exhaust temperature, which is a reference for turning the burner 30 back on after the burner 30 is turned off by correcting the exhaust temperature initial value. It is a value to calculate the set value.

Next, in S22, the controller 70 calculates each set value of the clothes temperature off set value, the clothes temperature on set value, the exhaust temperature off set value, and the exhaust temperature on set value. The clothing temperature off set value is a value obtained by reducing the clothing temperature off correction value from the clothing temperature off initial value. The clothing temperature temperature set value is a value obtained by reducing the clothing temperature temperature correction value from the clothing temperature temperature initial value. The exhaust temperature off set value is a value obtained by reducing the exhaust temperature off correction value from the exhaust temperature off initial value. The exhaust temperature temperature set value is a value obtained by reducing the exhaust temperature temperature correction value from the exhaust temperature temperature initial value. In S22 immediately after the start of the drying operation in S10, each correction value is set to 0 (S20), so each set value is the same as each initial value set in S16 or S18.

Next, the control device 70 monitors each of S24, S26, and S28. In S24, the control device 70 determines that the exhaust temperature detected by the exhaust temperature thermistor 22 is the exhaust temperature before a predetermined period (2 minutes and 30 seconds in this embodiment) has elapsed after starting the drying operation at S10. Monitors the off setting value (S22) or more. When the exhaust temperature becomes equal to or higher than the exhaust temperature off-set value before the predetermined period elapses, the control device 70 judges from S24 to YS, and each process of S110 or less in FIG. 5 (hereinafter referred to as “exhaust temperature temperature adjustment processing”). For example, when the air in the drum 10 has already become sufficiently high at the time immediately after the start of the drying operation, such as when the drying operation is re-executed immediately after the previous drying operation is completed, S24 to SES can be judged.

In S26, the control device 70 determines that the clothing temperature detected by the clothing temperature thermistor 60 becomes equal to or greater than the clothing temperature off setting value S22 before a predetermined period elapses after the start of the drying operation in S10. monitor If the clothing temperature becomes equal to or greater than the clothing temperature off set value before the predetermined period elapses, the control device 70 determines that , referred to as "clothing temperature control process"). For example, when the clothes C have already become sufficiently high at the time immediately after the start of the drying operation, such as when the clothes are not taken out immediately after the previous drying operation is completed and the drying operation is restarted, S26 It can be judged as YESS in

In S28, the control device 70 monitors that a predetermined period elapses after starting the drying operation in S10. After the drying operation is started at S10, when the state in which neither S24 nor S26 is judged to be YES and the predetermined period has not elapsed, the control device 70 determines that the Each process of S50 or less (hereinafter referred to as "closed correction process") is executed. On the other hand, if a predetermined period elapses after the start of the drying operation at S10, in a state in which neither S24 nor S26 is judged to be AE, the control device 70 determines that the Each process (hereinafter referred to as "course determination process") of to S86 is executed.

(Closed correction processing; Fig. 3)

With reference to Fig. 3, the contents of the closure correction processing will be described. In S50, the controller 70 determines whether the ejection temperature detected by the ejection temperature thermistor 40 is 140°C or more and less than 160°C. When the ejection temperature at this time is in the range of 140°C or more and less than 160°C, the control device 70 determines that it is YES from S50, and proceeds to S52. When the lint filter 16 is closed by the lint, the amount of air flowing through the ventilation path of the clothes dryer 2 decreases, and the blowing temperature increases accordingly. When the lint filter 16 is hardly closed, the ejection temperature is usually maintained in the range of less than 140°C, but when the lint filter 16 is closed, the ejection temperature rises to 140°C or higher. And, as the degree of closing of the lint filter 16 increases, the ejection temperature also increases. In S52, the control device 70 resets each correction value. In S52, the clothes temperature off correction value is set to 10, the clothes temperature temperature correction value is set to 10, the exhaust temperature off correction value is set to 5, and the exhaust temperature temperature correction value is set to 5, respectively. When S52 is finished, proceed to S54. On the other hand, when the ejection temperature is out of the range of 140°C or more and less than 160°C, the control device 70 determines that it is NO from S50, skips S52 and proceeds to S54.

In S54, the control device 70 determines whether the ejection temperature is 160°C or more and less than 180°C. When the ejection temperature at this time is in the range of 160°C or more and less than 180°C, the control device 70 determines that it is YES from S54, and proceeds to S56. In S56, the control device 70 resets each correction value. In S56, the clothes temperature off correction value is set to 15, the clothes temperature temperature correction value is set to 20, the exhaust temperature off correction value is set to 10, and the exhaust temperature temperature correction value is set to 10, respectively. When S6 is finished, it proceeds to S5 8. On the other hand, when the ejection temperature is out of the range of 160°C or more and less than 180°C, the control device 70 determines that it is NO in S54, skips S56, and proceeds to S58.

In S58, the control device 70 determines whether the ejection temperature is 180°C or more and less than 200°C. When the ejection temperature at this time is in the range of 180°C or more and less than 200°C, the control device 70 determines that it is AEOS from S58, and proceeds to S60. In S60, the control apparatus 70 turns on the notification lamp provided in the display part of the front surface of the cylinder 4 . Thereby, the user who saw the notification lamp can know that the lint filter 16 is currently closed and cleaning is required. Subsequently, in S62, the control device 70 resets each correction value. In S62, the clothes temperature off correction value is set to 20, the clothes temperature temperature correction value is set to 30, the exhaust temperature off correction value is set to 15, and the exhaust temperature temperature correction value is set to 15, respectively. When S62 is finished, proceed to S64. On the other hand, when the ejection temperature is in the range of 180°C or more and less than 200°C, the control device 70 determines that it is NO in S57, skips S60 and S62, and proceeds to S64.

In S64, the control device 70 determines whether the ejection temperature is 200°C or higher. When the ejection temperature at this time is 200° C. or higher, the control device 70 determines that it is from S64 to AES, proceeds to S66, and stops the drying operation in error. In this case, the controller 70 stops the motor 12 and the fan 14 and turns off the burner 30 . When S66 is finished, the control device 70 erroneously ends the drying operation. On the other hand, when the ejection temperature is not 200°C or higher, the control device 70 determines that it is NO in S64, and returns to S22 in FIG. That is, in S22, the control device 70 calculates each set value again using each of the correction values (S20, any one of S52, S56, and S62 in Fig. 3) set at this point in time. Then, according to each set value calculated again, the drying operation is continued.

That is, in the present embodiment, the control device 70 repeatedly executes the closure correction processing (see Fig. 3) until the predetermined period elapses without being judged as YES from S24 and S26, and during that time, Drying operation is continued while changing each setting value from time to time (S22 in Fig. 2) using each set latest correction value.

(Course judgment processing and clothing temperature control processing; Fig. 4)

With reference to Fig. 4, the contents of the course determination processing (S80 to S86) and the clothing temperature control processing (S974 to S97, S8, S970) will be described. In the present embodiment, the course determination processing (S80 to S86) is executed only once when a predetermined period has elapsed without being judged as YES in S24 and S26 in FIG. , S 90, S 9 4 to S 9 8).

In S80, the control device 70 determines the operation course of the drying operation (main judgment) based on the weight of the clothes C in the drum 10 and the dehydration degree of the clothes C, and the result is Determine whether it is rated or not. Since the content of the process of S80 is the same as that of S14 in FIG. 2, detailed description is omitted. When it is determined that the judgment result of the driving course is rated (S80 to YES), the control device 70 proceeds to S82. On the other hand, when it is determined that the judgment result of the driving course is not rated (NS80 to NO), the control device 70 proceeds to S84.

In S82 and S84, the controller 70 resets the initial values of the clothes temperature off initial value, the clothes temperature on initial value, the exhaust temperature off initial value, and the exhaust temperature on initial value. The processing of S82 and S84 is the same as the processing of S16 and S18, respectively.

Next, in S76, the control device 70 calculates each set value in the same manner as in S20. In SHS, the control device 70 is configured to control the control device 70 from the respective initial values set in S82 or S84, at the time when a predetermined period has elapsed (SES at each set time point) without being judged to be SES at S24 and S26 in FIG. 2 . By reducing the correction values (see S20 in Fig. 2, S52, S56, and S62 in Fig. 3), each set value is calculated. In this embodiment, when a predetermined period elapses (S28 to YES), the closure correction process (FIG. 3) is not executed, and each correction value is determined. Then, by executing the course determination processing (FIG. 4), each set value is determined (S76). Thereafter, the drying operation is continued according to each set value determined in S76. When SES is finished, the control device 70 executes the clothes temperature control processing (S87, S90, SPS4 to S978).

The control device 70 monitors S8 and S90. In S8, the control device 70 monitors that the exhaust temperature becomes equal to or greater than the exhaust temperature off-set value. When the exhaust temperature becomes equal to or greater than the exhaust temperature off-set value, the control device 70 determines that S8 to SES, and executes S110 or lower processing in FIG. 5 (that is, exhaust temperature temperature control processing). In this case, the clothing temperature control process is ended. In S90, the control device 70 monitors that the clothing temperature is equal to or greater than the clothing temperature off-set value. When the clothing temperature is equal to or greater than the clothing temperature off set value, the control device 70 determines that S90 to YES, and proceeds to S94.

In S94, the control device 70 turns off the burner 30 . Subsequently, in S6, the control device 70 monitors that the clothing temperature becomes less than the clothing temperature temperature set value. After the burner 30 is turned off, if the clothing temperature drops to less than the clothing temperature set value, the control device 70 determines that the NSV is YES, and proceeds to the SB8. In S98, the control device 70 turns on the burner 30 again. Then, it returns to the monitoring of S88 and S90.

(Exhaust temperature temperature control process; Fig. 5)

With reference to Fig. 5, the contents of the exhaust temperature temperature control process will be described. In S110, the control device 70 turns off the burner 30 and starts an off-timer for counting the off period. Subsequently, in S112, the control device 70 monitors that the off period elapses after starting the off-timer in S110. When the off period has elapsed, the control device 70 determines that S112 is YES, and proceeds to S114.

In S114, the control device 70 monitors that the exhaust temperature becomes less than the exhaust temperature temperature set value. After the burner 30 is turned off, when the exhaust temperature drops to less than the exhaust temperature temperature set value, the control device 70 determines that S114 to YES, and proceeds to S116. In S116, the control device 70 turns on the burner 30 again and starts the on-timer for counting the on period.

Next, the control device 70 monitors each of S118, S120, and S122. In S118, the control device 70 monitors that the on period elapses after starting the on-timer in S1116. When the on period has elapsed, the control device 70 determines that S118 is YES, returns to S110, and turns off the burner 30 again to start the off-timer. In S120, the control device 70 monitors that the clothing temperature becomes equal to or greater than the clothing temperature off-set value before the on period elapses. When the clothing temperature is equal to or greater than the clothing temperature off set value, the control device 70 determines that S120 is YES, and proceeds to S124. Further, in S122, the control device 70 monitors that the exhaust temperature becomes equal to or greater than the exhaust temperature off-set value before the on period elapses. When the exhaust temperature becomes equal to or greater than the exhaust temperature off set value, the control device 70 determines that S122 is YES, and proceeds to S124.

In S124, the control device 70 advances the on/off duty pattern by one step. For example, if the on/off duty pattern is set to pattern (1) (that is, on:off = 50 seconds: 10 seconds), in S124, the control device 70 converts the on/off duty pattern to the pattern ( 2) (ie, on:off = 45 seconds: 15 seconds). When S124 is finished, it returns to S110, and the control device 70 turns off the burner 30 again and starts the off-timer. After this, the control device 70 executes the respective processes of S110 to S124 according to the ON period and OFF period indicated by the on/off duty pattern after being changed in S124.

As described above, each of the above processes (refer to Figs. 2 to 5) is executed during the execution of the drying operation. When a predetermined drying operation time has elapsed, or when a predetermined drying stop operation is inputted to the operation unit, the control device 70 turns off the burner 30 and simultaneously turns off the motor 12 and the fan 14 . Stop and end the drying operation. In that case, the processing of Figs. 2 to 5 also ends.

(Drying operation of comparative example; Fig. 6)

Here, in order to fully explain the effects of the drying operation by the clothes dryer 2 of this embodiment, a comparative example in the case where the drying operation is performed using a conventional clothes dryer is described with reference to FIG. 6 . The conventional clothes dryer also has a configuration similar to that of the clothes dryer 2 shown in FIG. However, in the conventional clothes dryer, the exhaust temperature temperature control process shown in Fig. 5 is not executed. In the conventional clothes dryer, instead of the exhaust temperature temperature control process shown in Fig. 5, the burner is stopped when the exhaust temperature exceeds a predetermined exhaust temperature off-set value, and after stopping the burner, the exhaust temperature is adjusted to the predetermined exhaust temperature. When the temperature is lower than the temperature setting, a process for restarting the burner (hereinafter, sometimes referred to as "conventional temperature control process") is executed. That is, in the conventional temperature control process, the process for turning the burner on and off according to the on-off duty is not executed. Therefore, in the conventional temperature control process, the process for changing the on-off duty pattern is not executed either.

Fig. 6 is a graph showing the transition of the clothes temperature, the exhaust temperature, the ejection temperature, and the electrode detection state when the drying operation is performed by the clothes dryer of the comparative example. In the example of Fig. 6, the weight of the clothes C is 2 g, and the drying operation time is set to 35 minutes. In addition, the clothes temperature off set value and the clothes temperature on set value are set to 90°C and 80°C, respectively, and the exhaust temperature off set value and the exhaust temperature on set value are set to 72°C and 71°C, respectively. CTV, ETV, and BTV in FIG. 6 are graphs showing transitions of clothing temperature, exhaust temperature, and ejection temperature, respectively. DS indicates a detection state of an electrode (corresponding to the electrode 50 in FIG. 1) for detecting moisture in clothes. DS shows a pulse signal output when the electrode detects moisture in clothes.

In the example of Fig. 6, from the start of the drying operation to about 19 minutes, the clothes temperature, the exhaust temperature, and the ejection temperature continue to rise together. In addition, the frequency at which the electrode 50 detects moisture is high until about 15 minutes from the start of the drying operation, and thereafter it is decreasing (that is, drying is in progress). Then, 19 minutes after the start of the drying operation, the clothes temperature reaches the clothes temperature off set value (that is, 90° C.) or more, and the clothes temperature control process is executed. Then, after 23 minutes from the start of the drying operation, the exhaust temperature reaches the exhaust temperature off set value (that is, 72° C.) or more, and thereafter, the conventional temperature control process is executed. As a result, especially at the end of the drying operation (after 20 minutes), the number of times the burner is turned on and off is increased (the total number of times the burner is turned on is 20 times), and accordingly, the temperature in the drum is higher than the temperature suitable for drying. easy to maintain as As a result, in the drying operation by the conventional clothes dryer, the clothes in the drum are dried at an excessively high temperature, and there is a risk of being damaged.

(Drying operation of the embodiment; Fig. 7)

On the other hand, Fig. 7 is a graph showing the transition of the clothes temperature, the exhaust temperature, the ejection temperature, and the electrode detection state in the case where the drying operation is performed by the clothes dryer 2 of the present embodiment. In the example of FIG. 7, similarly to the example of FIG. 6, the weight of the clothes C is 2 g, and the drying operation time is set to 35 minutes. In addition, the clothes temperature off set value and the clothes temperature on set value are set at 90°C and 80°C, respectively, and the exhaust temperature off set value and the exhaust temperature on set value are set at 72°C and 71°C, respectively.

In the example of Fig. 7, from the start of the drying operation to about 15 minutes, the clothing temperature, the exhaust temperature, and the ejection temperature continue to rise together. In addition, the frequency at which the electrode 50 detects moisture is high until about 15 minutes from the start of the drying operation, and thereafter it is decreasing (that is, drying is in progress). Then, after 17 minutes from the start of the drying operation, the exhaust temperature reaches the exhaust temperature off set value (that is, 72 DEG C) or more, and thereafter, the exhaust temperature control process in Fig. 5 is executed. That is, the control device 70 sets the clothing temperature to the clothing temperature off-set value once the burner 30 is turned off (S110 in Fig. 5), and while the burner 30 is turned on again (S116) during the on period again. In the case of reaching an abnormality (S120 to YS), or when the exhaust temperature reaches more than the exhaust temperature off-set value, the on-off duty pattern is performed one step (S124). As a result, the OFF period after the next time becomes longer and the ON period becomes shorter. Thereby, the decrease of the clothes temperature and the exhaust temperature during the off period is promoted, and the increase of the clothes temperature and the exhaust temperature during the on period is suppressed. Therefore, it is suppressed that the number of times of on/off repetition of the burner 30 increases (the total number of times of turning on the burner 15 times). Accordingly, it is possible to suppress that the temperature in the drum 10 is kept higher than a temperature suitable for drying, and it is possible to suppress damage to the clothes C in the drum 10.

In the above, the configuration and operation contents of the clothes dryer 2 of the present embodiment have been described. As described above, after the start of the drying operation (S10 in Fig. 2), the control device 70 executes the closing correction processing shown in Fig. 3, and sets each correction value according to the ejection temperature. Specifically, each correction value is set to a value greater than zero when the ejection temperature is in the range of 140°C or higher. Then, when the predetermined period has elapsed (S28 to YES), the control device 70 sets each correction value set at the time when the predetermined period has elapsed (see S20 in Fig. 2, S52 in Fig. Based on this, each set value is calculated (S76 in Fig. 4). Then, thereafter, the drying operation is continued according to each set value determined in S76. That is, when the ejection temperature at the time when the predetermined period has elapsed is 140 DEG C or higher, each set value is lower than the initial value. For this reason, for example, when the ejection temperature is set to be 140 DEG C or higher due to circumstances such as the lint filter 16 being closed, the burner 30 can be turned off relatively early. Therefore, in the case where the lint filter 16 is closed or the like, it is possible to suppress an excessive increase in the clothing temperature or the exhaust temperature. Therefore, according to the clothes dryer 2 of this embodiment, it is possible to suppress the clothes C in the drum 10 from being dried at an excessively high temperature and to suppress damage to the clothes C in the drum 10. have.

In addition, in this embodiment, the control device 70 uses each correction value set by the closure correction process in FIG. 3 even after a predetermined period has elapsed after the start of the drying operation (S10 in FIG. 2), Each set value is calculated (S22 in Fig. 2), and a drying operation is performed based on the set value. Then, after the start of the drying operation (S10 in Fig. 2), before the predetermined period has elapsed, when the exhaust temperature reaches the exhaust temperature off set value or higher (YES in S24), or when the clothes temperature reaches the clothes temperature off set value When the abnormality is reached (S26 to SES), the course determination process (S80 to S86 in Fig. 4) is skipped, and based on each set value set at that point, the clothing temperature control process (SNS in Fig. 4) is skipped. hereinafter) and exhaust temperature temperature control processing (S110 or less in Fig. 5). That is, according to the clothes dryer 2 of the present embodiment, there is no lapse of a predetermined period even in a situation such as, for example, when the drying operation is executed again immediately after the previous drying operation is finished, and there is no appropriate Drying operation can be performed based on each set value. Therefore, it is possible to appropriately suppress damage to the clothes C in the drum 10 irrespective of the condition of the drying operation.

Further, in the present embodiment, the control device 70 sets not only the clothes temperature off correction value and the exhaust temperature off correction value but also the clothes temperature temperature correction value and the exhaust temperature temperature correction value in the closing correction process of FIG. do. Therefore, according to the clothes dryer 2 of this embodiment, the burner ( 30), the clothes temperature and exhaust temperature (ie, the clothes temperature set value and the exhaust temperature set value), which are the reference when turning on the clothes, can also be corrected. Therefore, it is possible to suppress an excessive increase in the number of on/off repetitions of the burner 30, and to properly maintain the temperature in the drum 10 at a temperature suitable for drying the clothes C.

In addition, in the present embodiment, in the closing correction processing of Fig. 3, when the ejection temperature is 140 °C or more and less than 160 °C (S50 to YES), the clothing temperature off correction value and the clothing temperature temperature correction value are both 10 (S52) ), when the ejection temperature is 160°C or more and less than 180°C (S54 to YES), the clothing temperature correction value (20) is greater than the clothing temperature off correction value (15). And, when the ejection temperature is 180°C or more and less than 200°C (S58 to YES), the clothing temperature temperature correction value (30) is larger than the clothing temperature off correction value (20). That is, according to the clothes dryer 2 of this embodiment, when the degree of closure of the lint filter 16 is relatively high, compared to when the degree of closure is relatively low, the temperature correction value for clothes is larger than the correction value for clothes temperature off (that is, when the degree of closure is relatively low). The temperature difference between the off-set value and the on-set value can be increased). As a result, the average temperature of the clothing temperature can be lowered, and the number of on/off switching of the burner 30 can be reduced.

Further, in this embodiment, when the exhaust temperature reaches the exhaust temperature off set value or more after the start of the drying operation, the control device 70 executes the exhaust temperature temperature control process of Fig. 5 . That is, after the burner 30 is turned off (S110 in FIG. 5), while the burner 30 is turned on again during the on period (S116), the clothing temperature is higher than the clothing temperature off set value. (S120 to YS), or when the exhaust temperature reaches more than the exhaust temperature off-set value, the on-off duty pattern proceeds by one step (S124). As a result, the off period for the next time or less becomes longer and the on period becomes shorter. Thereby, the decrease of the clothes temperature and the exhaust temperature during the off period is promoted, and the increase of the clothes temperature and the exhaust temperature during the on period is suppressed. Therefore, the number of on/off repetitions of the burner 30 can be suppressed. And with it, it is suppressed that the temperature in the drum 10 is kept higher than the temperature suitable for drying, and it can suppress that the clothes C in the drum 10 are damaged.

Correspondence between the description of the present embodiment and the description of the claims will be explained. Clothing temperature and exhaust temperature are examples of "relational temperature". Clothing temperature thermistor and exhaust temperature thermistor are examples of "relational temperature detecting means". The clothing temperature off set value and the exhaust temperature off set value are examples of the "off threshold". The clothes temperature set value and the exhaust temperature set value are examples of the “on threshold value”. A case in which S50 or S54 or S58 in FIG. 3 is YES is an example of a "specific case".

As mentioned above, although an Example was demonstrated in detail, these are only an illustration and do not limit the scope of a claim. The technology described in the claims includes various modifications and changes of the specific examples exemplified above.

(Modification 1) In the above embodiment, in the case of S120 or S122 in Fig. 5, the control device 70 advances the ON/OFF duty pattern by one step (S124). Instead of this, the control device 70 may skip S124 and proceed to S110 (that is, when the clothes temperature reaches the clothes temperature off-set value or more) when S120 to YES (that is, when the clothes temperature reaches or more). It is not necessary to proceed with the pattern step 1). Conversely, when S122 to YS (that is, when the exhaust temperature reaches the exhaust temperature off-set value or more), the control device 70 may skip S124 and proceed to S110 (that is, change the on/off duty pattern) You do not need to proceed to step 1).

(Modification 2) Further, the control device 70, before the on period elapses, when the clothes temperature reaches the clothes temperature off set value or more, and the exhaust temperature reaches the exhaust temperature off set value or more (i.e. , in the case of both S120 and S122 in FIG. 5), the control device 70 may advance the on/off duty pattern by one step.

(Modification 3) In the above embodiment, in S124 of Fig. 5, the control device 70 advances the on-off duty pattern by one step, lengthening the off period and shortening the on period. . Without being limited to this, in S124, the control device 70 may lengthen the off period and not change the on period. In this case, the sum of the off period and the on period may be longer or shorter than a predetermined unit period (for example, 60 seconds).

(Modification 4) In the above embodiment, in S20 in Fig. 2, S52, S56, and S62 in Fig. 3, the control device 70, in addition to the clothing temperature off correction value and the exhaust temperature off correction value, adds the clothing temperature The temperature correction value and the exhaust temperature temperature correction value are further set, and each set value is calculated using these correction values (S22 in Fig. 2, S86 in Fig. 4). Without being limited thereto, in S20 of FIG. 2 and S52, S56, and S62 of FIG. 3 , the control device 70 sets only the clothing temperature off correction value and the exhaust temperature off correction value, and the clothing temperature correction value and The setting of the exhaust temperature temperature correction value may be omitted. In this case, in S22 of FIG. 2 and S76 of FIG. 4 , the controller 70 sets the clothing temperature initial value and the exhaust temperature initial value as the clothing temperature temperature set value and the exhaust temperature temperature set value as they are, respectively. You may specify (that is, it is not necessary to perform the calculation of subtracting a correction value).

(Modification 5) In the above embodiment, after the start of the drying operation (S10 in Fig. 2), the control device 70 executes the closing correction processing in Fig. 3, and sets each correction value according to the ejection temperature. . Specifically, each correction value is set to a value greater than zero when the ejection temperature is in the range of 140°C or higher. Instead of this (or in addition to this), the control device 70 may set each correction value according to the amount of increase in the blowout temperature from the start time of the drying operation. In other words, the control device 70 may set each correction value according to the degree of rise (or the rate of rise) of the blowout temperature from the start time of the drying operation. In addition, each correction value may be set to a value larger than 0 when the amount of rise of the ejection temperature is in the range of a predetermined rise temperature threshold value (for example, 120° C.) or more. Then, when a predetermined period has elapsed, the control device 70 may calculate each set value based on each correction value set at the time when the predetermined period has elapsed. Then, thereafter, the drying operation may be continued according to each set value determined. Even in the case of this modification, the clothes dryer 2 can suppress excessive increases in the clothes temperature or exhaust temperature depending on circumstances such as the lint filter 16 being closed.

The technical elements described in the present specification or drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or drawings can achieve a plurality of purposes at the same time, and achieving one of the objectives has technical usefulness itself.

2: Clothes dryer 4: Cylinder
6：Door 10：Drum
10a: front opening 10b: rear opening
12: Motor 14: Fan
16: Lint filter 20: Exhaust port
22: Exhaust temperature thermistor 30: Burner
32: Gas supply pipe 34: Solenoid valve
36: Blowout port 40: Blowout temperature thermistor
50: Electrode 60: Clothing temperature thermistor
70: Control device C: Clothing

Claims (5)

In the clothes dryer,
a drum for accommodating clothes;
a fan that blows air into the drum from the outside;
a burner that heats the air sent into the drum;
an ejection temperature sensor for detecting ejection temperature, which is the temperature of the air after being heated by the burner and before being sent into the drum;
a clothing temperature sensor that detects a clothing temperature that is the temperature of the clothing in the drum;
have a control device
the control device,
After starting the drying operation by operating the burner and the fan, the burner is stopped and the burner is stopped when the temperature of the clothes detected by the clothes temperature sensor exceeds a predetermined OFF clothes temperature threshold. Afterwards, when the clothing temperature detected by the clothing temperature sensor is lower than a predetermined ON clothing temperature threshold value lower than the off clothing temperature threshold value, the burner is operated again,
When the blowout temperature detected by the blowout temperature sensor at the time when the predetermined period has elapsed after the start of the drying operation exceeds the predetermined blowout temperature threshold, and from the time when the drying operation is started to the time when the predetermined period has elapsed A clothes dryer for lowering the off-clothing temperature threshold in a specific case, which is at least one of the cases in which the rising amount of the ejection temperature of is higher than the predetermined rising amount threshold. According to claim 1,
The specific case includes a case in which the clothes temperature detected by the clothes temperature sensor exceeds an OFF clothes temperature threshold value before a predetermined period has elapsed after starting the drying operation. 3. The method of claim 1 or 2,
The control device, in the specific case, lowers an ON clothing temperature threshold value. delete delete

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