JP3318536B2 - Clothes dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a clothes dryer having a function of recognizing whether or not a filter is closed.

[0002]

2. Description of the Related Art In a clothes dryer for drying clothes by storing clothes in a rotating drum and introducing hot air into the rotating drum, lint, dust, etc. are collected from the clothes in the rotating drum together with moist air. Is also released. If these lint and dust are directly discharged from the rotating drum, the clothes dryer that discharges air through an exhaust pipe has a disadvantage that the exhaust pipe is clogged. Is inconvenient in that the room is contaminated with lint, dust and the like.

[0003] Conventionally, exhaustion from the rotating drum is performed through a filter, and lint and dust discharged from the clothes are collected by the filter, so that lint and dust are discharged from the clothes dryer. Try to prevent that.

[0004] However, if the use period of the clothes dryer is prolonged and the filter is blocked by lint or dust collected in the filter, exhaust from the rotating drum is restricted, and the drying capacity of the clothes dryer is limited. And it will not work properly. Therefore, in the conventional clothes dryer, it is monitored whether or not the filter is closed, and when it is detected that the filter is closed, the user is notified of the fact and is prompted to clean or replace the filter. Was.

[0005] In a clothes dryer that generates hot air to be supplied to a rotating drum using a burner or an electric heater as a heating source, generally, a blockage of a filter is detected by providing a temperature sensor in the rotating drum. I am trying to do it.
When the filter is closed when a burner or an electric heater is used as a heating source, the amount of air blown from the heating source to the rotating drum decreases, and hot air stays in the rotating drum. It rises abnormally. Therefore, by monitoring the temperature detected by the temperature sensor in this way, the blockage of the filter can be detected.

However, the inventors of the present invention have developed a heat exchanger (hereinafter, referred to as a heat exchanger) that heats air by radiating hot water supplied from a water heater.
In a clothes dryer that uses a hot water heat exchanger as a heating source to generate hot air to be supplied to the rotating drum, even if the filter is closed and the total air volume to the rotating drum is reduced, the hot water in the heat exchanger is reduced. Since the temperature is as low as about 80 ° C. and the temperature of the hot air supplied to the rotating drum is lower than that of the clothes dryer using the above-described burner or electric heater as a heating source, the temperature rise in the rotating drum is slight. According to the above-described method, that is, it is difficult to detect the blockage of the filter by providing a temperature sensor in the rotating drum of the heat exchanger that is the heating source and monitoring the temperature detected by the temperature sensor. did.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and has as its object to provide a clothes dryer that can detect a blockage of a filter using a hot water heat exchanger as a heating source. .

[0008]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and has a rotary drum for storing clothes and a heat exchanger for heating air by the amount of heat of hot water supplied from a water heater. Drying the clothes by introducing the air heated by the heat exchanger from the air inlet of the rotary drum and discharging the moist air from the air outlet of the rotary drum through a filter. The present invention relates to improvement of a clothes dryer for driving.

In a clothes dryer using a heat exchanger (hot water heat exchanger) for heating air by the amount of hot water supplied from a water heater, a burner or an electric heater is heated even if the filter is closed. Unlike the source clothes dryer, the temperature in the rotating drum does not rise abnormally. Therefore, like a clothes dryer using a burner or an electric heater as a heating source, a temperature sensor is provided in a rotating drum to monitor an abnormal rise in the temperature detected by the temperature sensor, thereby blocking the filter. I can't recognize.

Therefore, a first embodiment of the present invention comprises a hot water temperature detecting means for detecting a hot water temperature to the heat exchanger, a hot water temperature detecting means for detecting a hot water temperature from the heat exchanger, When the difference between the temperature detected by the hot water temperature detecting means and the temperature detected by the hot water temperature detecting means becomes smaller than or equal to a predetermined value during the execution of the drying operation, the filter is recognized as being blocked by the filter. The apparatus is characterized by comprising recognition means, and drying operation stopping means for stopping the drying operation when the filter is recognized to be closed by the filter closing recognition means.

When the hot water heat exchanger is used as a heating source, the amount of air heated by the heat exchanger decreases when the amount of air blown to the rotary drum decreases due to the blockage of the filter. Therefore, the amount of heat taken from the hot water supplied from the water heater to the heat exchanger is reduced, and the difference between the temperature of the hot water supplied to the heat exchanger and the temperature of the hot water discharged from the heat exchanger is reduced. Becomes smaller. Therefore, the filter blockage recognizing means recognizes that the filter is closed when the difference between the temperature detected by the hot water temperature detecting means and the temperature detected by the hot water temperature detecting means becomes equal to or less than the predetermined value. Can be.

When the filter blockage recognizing means recognizes that the filter is blocked, the drying operation is stopped by the drying operation stopping means, whereby the filter is closed and the drying capacity is reduced. The drying operation is continued in a state in which the drying capacity is reduced, and it is possible to prevent the use of the clothes dryer while the drying capacity is reduced.

[0013] The apparatus further includes room temperature detecting means for detecting the temperature in the room where the clothes dryer is installed, and the filter blockage recognizing means increases the predetermined value as the detected temperature of the room temperature detecting means decreases. Is set.

The hot water in the heat exchanger is cooled by being deprived of heat by the air in the room where the clothes dryer is installed. Therefore, the lower the temperature of the indoor air, the greater the degree of cooling of the hot water in the heat exchanger during the drying operation, and the higher the detected temperature of the hot water temperature detecting means and the detected temperature of the hot water temperature detecting means. The difference becomes large. In consideration of this point, by setting the predetermined value to a larger value as the room temperature detected by the room temperature detecting means is lower, the blockage of the filter can be more accurately recognized.

Further, a second embodiment of the present invention provides a hot water temperature detecting means for detecting a hot water temperature to the heat exchanger,
Tapping temperature detection means for detecting tapping temperature from the heat exchanger; and when a difference between a detection temperature of the tapping temperature detection means and a detection temperature of the tapping temperature detection means is equal to or less than a first predetermined value, A filter blockage recognizing unit for recognizing that the filter is closed, and notifying the user when the filter blockage recognizing unit recognizes that the filter is closed during execution of the drying operation. Notification means for performing the following.

According to the present invention, similarly to the first embodiment, the filter closing recognition means can recognize that the filter is closed. And, when the filter blockage recognizing unit recognizes that the filter is closed, by providing a notifying unit for notifying a user, the user is notified that the filter is closed, and the filter is closed. Cleaning and replacement can be encouraged.

Further, the filter blockage recognizing means includes:
A drying operation stopping means for stopping the drying operation when it is recognized that the filter is closed is provided.

According to the present invention, it is possible to prevent the drying operation from being continued in a state where the drying capacity is reduced due to the blockage of the filter, and to prevent wasteful energy from being consumed.

Also, the filter blockage recognizing means can
A drying operation stopping means for stopping the execution of the drying operation when a predetermined time has elapsed after it is recognized that the filter is closed is provided.

Immediately before the end of the drying operation, if the filter is recognized as being closed by the filter closing recognizing means and the drying operation is immediately stopped by the drying operation stopping means, the user is instructed. It becomes inconvenient to use. That is, in such a case, even if the drying ability of the clothes dryer slightly decreases due to the blockage of the filter, it is better to continue the drying operation until the drying of the clothes is completed, in accordance with the request of the user. It is thought that it conforms.

Therefore, in the present invention, the filter closing recognition means recognizes that the filter is closed, and continues the drying operation even when the drying capacity of the dryer is slightly reduced. Then, the predetermined time elapses after the filter blockage recognition unit recognizes the filter blockage, the filter blockage further progresses, and the drying ability of the clothes dryer further decreases to dry the clothes. When the state where it is assumed that it is not possible to expect, the drying operation is stopped by the drying operation stopping means, thereby preventing the use of the clothes dryer in a state where the drying capacity is lower than usual. can do.

The apparatus further includes a room temperature detecting means for detecting a temperature in a room where the clothes dryer is installed, and the filter blockage recognizing means sets the first predetermined value as the detected temperature of the room temperature detecting means decreases. It is characterized in that it is set to a large value.

According to the present invention, similarly to the first embodiment, the blockage of the filter can be more accurately recognized.

Further, during the execution of the drying operation, a difference between a temperature detected by the hot water temperature detecting means and a temperature detected by the hot water temperature detecting means is set to a second predetermined value smaller than the first predetermined value. A drying operation stopping means for stopping the drying operation when the value becomes equal to or less than the value is provided.

According to the present invention, the filter closing recognition means recognizes that the filter is closed, and continues the drying operation even when the drying ability of the clothes dryer slightly decreases. You. Therefore, even if the filter blockage recognizing means recognizes that the filter is closed immediately before the end of the drying operation, the drying operation is not immediately stopped, and the usability of the user is good.

Then, as the blockage of the filter progresses, the difference between the temperature detected by the hot water temperature detecting means and the temperature detected by the hot water temperature detecting means becomes equal to or less than the second predetermined value, and the drying capacity of the dryer further increases. When the drying operation is stopped by the drying operation stopping means when the drying operation is stopped and the drying operation is stopped, the clothes drying machine is used in a state where the drying ability is reduced. Can be prevented.

[0027] Further, the apparatus further comprises room temperature detecting means for detecting the temperature in the room where the clothes dryer is installed, and the filter blockage recognizing means sets the first predetermined value as the detected temperature of the room temperature detecting means decreases. The drying operation stopping means is set to a larger value, and the drying operation stopping means sets the second temperature as the detected temperature of the room temperature detecting means decreases.
It is characterized in that the predetermined value is set to a large value.

According to the present invention, similarly to the first embodiment, the blockage of the filter can be more accurately recognized, and the timing of stopping the drying operation can be determined more accurately. be able to.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1 is an overall configuration diagram of the clothes dryer of the present invention, FIG. 2 is a control block diagram of the clothes dryer shown in FIG. 1, FIGS. 3 and 4 are operation flowcharts of the clothes dryer shown in FIG. Is a graph for determining a reference value for recognizing blockage of a filter.

Referring to FIG. 1, the overall operation of a clothes dryer 1 of the present embodiment is controlled by a controller 2 comprising a CPU, a ROM, a RAM, and the like, and clothes D to be dried are stored. Rotating drum 3, a hot water heat exchanger 4 for heating air supplied to the rotating drum 3, and suctioning the air heated by the heat exchanger 4 from the suction port 5 to the rotating drum 3, An intake / exhaust fan 7 for exhausting the humid air released from the garment S in the interior 3 through an exhaust port 6, a motor 8 for rotating the intake / exhaust fan 7 and the rotating drum 3, and an open / close state of a door 9 of the rotating drum 3. , A clothing temperature thermistor 11 for detecting the temperature of the clothing S in the rotating drum 3, and an electrode sensor 12 that is turned on / off according to the degree of wetness of the clothing S contacted between the electrodes a and b. , Exhaust port 6 An exhaust temperature thermistor 13 for detecting the temperature of the humid air discharged from the air; a room temperature thermistor 14 for detecting the temperature in the room where the clothes dryer 1 is installed (corresponding to a room temperature detecting means of the present invention); And an operation panel 15 including switches to be operated.

In the clothes dryer 1 of the present embodiment,
The humid air discharged from the exhaust port 6 is discharged outside through an exhaust pipe 19 communicating with a ventilation port 18 provided on a wall 17 such as a veranda through the ceiling. Further, by opening the thermal valve 21 that opens and closes the hot water supply pipe 22, the hot water supply device 2 is opened.
Hot water is circulated between the heat exchanger 4 and the heat exchanger 4 via a hot water supply pipe 22 and a hot water supply return pipe 23.

The hot water supply pipe 22 is provided with a hot water temperature thermistor 24 (corresponding to a hot water temperature detecting means of the present invention) for detecting the temperature of hot water supplied to the heat exchanger 4.
3 is provided with a tapping temperature thermistor 25 (corresponding to tapping temperature detecting means of the present invention) for detecting the temperature of tapping water from the heat exchanger 4.

The filter 26 attached to the exhaust port 6 is for preventing lint and dust generated from the clothes S from being discharged to the exhaust pipe 19. When the clothes drying operation is performed by the clothes dryer 1, lint, dust, and the like gradually adhere to the filter 26. When the amount of lint or dust attached to the filter 26 increases, the load when the humid air is discharged from the exhaust port 6 increases, and a normal drying operation cannot be performed. Therefore, the filter 26 is detachable from the exhaust port 6,
The user can remove the filter 26 from the exhaust port 6 to perform cleaning.

Referring to FIG. 2, the controller 2 includes a door open / close detection signal output from the door switch 10, a clothing temperature thermistor 11, an exhaust temperature thermistor 13, a room temperature thermistor 14, a hot water temperature thermistor 24, and A temperature detection signal output from tap water temperature thermistor 25 and a dryness detection signal output from electrode sensor 12 are input. Based on these detection signals, referring to FIG. 1, the controller 2 determines whether the door 9 is open or closed, the temperature of the clothes S in the rotating drum 3, the temperature of the air discharged from the exhaust port 6, the room temperature, the heat exchanger, 4, the temperature of hot water from the heat exchanger 4 and the degree of drying of the clothes S are recognized.

The electrode sensor 12 detects when the resistance value between the electrodes a and b (increases as the degree of drying of clothes in contact with the electrodes a and b increases) exceeds a predetermined level (about several MΩ). Then, the detection output is turned ON. The controller 2 inputs the detection output of the electrode sensor 12 at predetermined time intervals, and the ratio of the number of times the detection output of the electrode sensor 12 is ON to the number of input times per fixed time (hereinafter, referred to as
When the electrode sensor ON frequency) is 95% or more, it is determined that the clothes are dry.

Referring to FIG. 2, the control signal output from controller 2 controls the rotation operation / stop of motor 8 via motor driver 30 and the opening of thermal valve 21. You. Further, the hot water heater 20 is controlled by a hot water temperature instruction signal output from the controller 2 to the hot water heater 20.
Starts its operation and enters a standby state. And then Figure 1
When the thermal valve 21 is opened, hot water at a predetermined temperature (for example, 80 ° C.) is supplied from the water heater 20 to the heat exchanger 4 via the hot water supply pipe 22.

Referring to FIG. 2, the operation panel 15 includes a power switch 31 for instructing start and stop of power supply to the clothes dryer 1, and a start switch 32 for instructing start and pause of the drying operation. The display unit 33 for displaying the remaining time of the drying operation, the voice unit 34 for notifying the user of the end of the drying operation by voice (corresponding to the notification means of the present invention), and the filter 26 (see FIG. 1) are closed. And a filter lamp 35 (corresponding to a notifying means of the present invention) which is turned on when it is turned on.

Next, the operation control of the clothes dryer 1 by the controller 2 will be described with reference to FIGS. 1 and 2 and the flowcharts shown in FIGS.
In STEP 1 of FIG. 3, when the user turns on the power switch 31 of the operation panel 15 (see FIG. 2), power is supplied to the clothes dryer 1 and the controller 2 starts operating. The controller 2 first waits for the user to operate the start switch 32 of the operation panel 15 in STEP2. When the start switch 32 is operated by the user who puts the clothes S in the rotary drum 3 and finishes the preparation for the drying operation, the process proceeds to STEP 3 and the controller 2
A hot water temperature instruction signal is output to 0. Thereby, as described above, water heater 20 is in a standby state.

In the following STEP 4, the controller 2 responds to the open / close detection signal from the door switch 10 to
Confirm that the door 9 of the user has not been forgotten to close.
And when it is confirmed that the door 9 is in the closed state,
Proceeding to STEP 5, the controller 2 starts the rotation operation of the motor 8 via the motor driver 30, and in conjunction with the rotation of the motor 8, the rotation of the rotary drum 3 and the intake / exhaust fan 7 is also started (see FIG. 1). . And controller 2
Opens the thermal valve 21 in STEP6. This allows
Referring to FIG. 1, hot water discharged at 80 ° C. from hot water supply 20 to heat exchanger 4 via hot water supply pipe 22 is supplied. And the air heated by the heat exchanger 4 is
Hot air is generated by the operation of the intake / exhaust fan 7 and is introduced into the rotary drum 3 from the intake port 5 to start the drying operation.

The controller 2 determines in step 7 the clothing S based on the relationship between the temperature inside the rotating drum 3 detected by the clothing thermistor 11 and the temperature of the air exhausted from the exhaust port 6 detected by the exhaust temperature thermistor 13. Is calculated, and the calculated time is displayed on the display unit 33 of the operation panel 15 as the remaining time until the end of the drying operation.

The following STEP 8 is a process by the filter blockage recognizing means 36 (see FIG. 2) provided in the controller 2. Referring to FIG. 1, filter closing recognizing means 36 detects water heater 20 detected by hot water temperature thermistor 24.
The difference ΔT between the temperature of the hot water supplied from the heat exchanger 4 to the heat exchanger 4 and the temperature of the hot water discharged from the heat exchanger 4 detected by the hot water temperature thermistor 25 (hereinafter, referred to as an incoming and outgoing hot water temperature difference) is the first.
When the value becomes equal to or less than the predetermined value T _B1 , it is recognized that the filter 26 is in a closed state.

If the filter 26 is blocked during the execution of the drying operation, the amount of air taken in from the intake port 5 by the intake / exhaust fan 7 decreases. Therefore, the amount of air heated by the heat exchanger 4 decreases, the amount of heat taken from the hot water in the heat exchanger 4 decreases, and the degree of decrease in the temperature of the hot water in the heat exchanger 4 decreases. Therefore, filter blockage recognizing means 3
No. 6 can recognize that the filter 26 is closed when the hot and cold water temperature difference ΔT becomes equal to or less than the first predetermined value T _B1 .

When the room temperature decreases, the degree of cooling of the hot water in the heat exchanger 4 increases, so that the temperature difference ΔT between the incoming and outgoing hot water increases. Therefore, taking this point into account, the filter blockage recognizing means 36 sets the first predetermined value _TB1 according to the room temperature according to the graph shown in FIG. In the graph shown in FIG. 5, the horizontal axis represents the room temperature detected by the room temperature thermistor 14, and the vertical axis represents the temperature difference ΔT between incoming and outgoing water. The filter blockage recognizing means 36 sets the first predetermined value _TB1 to a larger value as the room temperature is lower, according to the straight line (determined by experiment) shown in the figure. Accordingly, the filter blockage recognition unit 36 can recognize the blockage of the filter 26 with higher accuracy.

At STEP 8, the filter closing recognition means 36
When it is not recognized that the filter 26 is closed, the controller 2 proceeds to STEP9. STEP
9 is a process for determining the end of the drying operation.
Monitors the detected temperature of the clothing S output from the clothing temperature thermistor 11, the detected temperature of the exhaust air output from the exhaust temperature thermistor 13, and the degree to which the electrode sensor 12 is turned on. Then, when the detected temperature of the clothing exceeds 55 ° C., the detected temperature of the exhaust air exceeds 60 ° C., and the above-mentioned electrode sensor ON frequency becomes 95% or more, it is determined that the clothing S has dried. Then, the process proceeds to STEP10.

Then, the controller 2 executes STEP 10
To close the thermal valve 21, stop the motor 8 in STEP 11, and in STEP 12 the audio unit 34 of the operation panel 15.
Then, a sound (for example, “drying operation has been completed”) is output to notify that the drying operation has been completed, and the drying operation is completed.

On the other hand, in STEP8, the hot and cold water temperature difference ΔT becomes equal to or less than the first predetermined value _TB1 , and the filter blockage recognizing means 36
When it is determined that the filter 26 is closed, the controller 2 branches to STEP 20 and
At 20, the filter lamp 35 (see FIG. 2) is turned on, and ST
The filter 2 is given to the user by the audio unit 34 in EP21.
By performing a voice output (for example, “Please clean the filter”) that prompts the user to clean the filter 6, the user is prompted to clean the filter 26.

The following STEP 30 and STEP 35 to ST
The EP 37 is a process by the drying operation stopping means 37 (see FIG. 2) provided in the controller 2. When the filter 26 is closed, the amount of hot air sucked into the rotating drum 3 decreases, and the drying ability of the clothes dryer 1 decreases.
In step 8, when the filter blockage recognizing means 36 recognizes the blockage of the filter 26, the drying operation is immediately stopped to prevent the clothes dryer 1 from being used in a state where the drying capacity is reduced. Is also good.

However, immediately before the end of the drying operation, STEP
When it is recognized in step 8 that the filter 26 is clogged, it is better for the user to continue the drying operation and terminate the drying operation as it is, even if the drying capacity is slightly reduced, rather than immediately stopping the drying operation. It is considered to be easy to use.

[0049] Therefore, the drying operation stop means 37, clogging of the filter 26 is further advanced, at STEP 30, the second to enter the hot water temperature difference ΔT is set to a value lower than the first predetermined value T _B1
The drying operation is not stopped until the value becomes equal to or less than the predetermined value _TB2 . As a result, the controller 2 continues the drying operation,
In P31, the remaining time until the end of the drying operation is displayed in the same manner as in STEP7, and in STEP32, when the end condition of the drying operation (similar to STEP9) is satisfied, STEP10 is performed.
To end the drying operation.

Then, in STEP 30, the temperature difference Δ
When T becomes equal to or less than the second predetermined value T _B2 , the drying operation stopping means 37 determines that the drying ability of the clothes dryer 1 has decreased to such an extent that the effect of drying the clothes cannot be obtained, and ST
The thermal valve 21 is closed in EP35, the operation of the motor 8 is stopped in STEP36, and an audio output (for example, "Drying operation is stopped due to clogging of the filter 26") is performed in STEP37 to perform the drying operation. Abort. This prevents the use of the clothes dryer 1 in a state where the drying ability is extremely reduced.

As with the first predetermined value T _B1 , the second predetermined value T _B2 is set to a larger value as the room temperature is lower, in accordance with the straight line (determined by experiment) shown in FIG. Thus, it is possible to more accurately determine the stop time of the drying operation.

Then, in STEP 38, the user turns off the power switch 31 to release the stop state of the drying operation. After the user cleans the filter 26, the user turns on the power switch 31. Thus, normal drying operation can be performed again.

In the present embodiment, as shown in FIG. 4 (a), the drying operation stopping means 37 determines whether or not the temperature difference ΔT between the hot water and the cold water becomes equal to or less than the second predetermined value in STEP30.
Branching to EP35 to stop the drying operation,
When the drying operation is continued for a predetermined time after the filter 26 is recognized as closed by the filter closing recognition means 36, the closing of the filter 26 proceeds, and the drying ability of the clothes dryer 1 has an effect of drying clothes. It can be determined that it has decreased to an extent that it cannot be performed.

Therefore, as shown in FIG.
In EP40, a timer for setting the predetermined time as a set time may be started, and in STEP41, when the timer expires, the process may branch to STEP45 to stop the drying operation.

Further, in the present embodiment, the water heater 20 started to operate in response to the hot water temperature instruction signal from the clothes dryer 1 is used. A water heater that starts operation by detecting flowing water to the heater may be used.

Further, in the present embodiment, when the filter blockage recognizing means 36 recognizes the blockage of the filter 26, the filter non-lamp 35 and the sound unit 34 (corresponding to the notifying means of the present invention) are used for notification. Although both of the drying operation stopping means 37 and the drying operation stopping means 37 are executed, the effect of the present invention can be obtained by performing only one of the processes.

Further, in the present embodiment, the water heater 20 supplies a constant temperature to the heat exchanger 4 (the outlet temperature of the water heater 20 is 8).
(0 ° C.) is shown, but when the temperature of the hot water supplied from the water heater 20 to the heat exchanger 4 fluctuates, the first hot water is supplied according to the temperature detected by the hot water thermistor 24. The set values of the predetermined value T _B1 and the second predetermined value T _B2 may be changed.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a clothes dryer.

FIG. 2 is a control block diagram of the clothes dryer.

FIG. 3 is an operation flowchart of the clothes dryer.

FIG. 4 is an operation flowchart of the clothes dryer.

FIG. 5 is a setting graph of a reference value for recognizing blockage of a filter.

[Explanation of symbols]

1 ... clothes dryer, 2 ... controller, 3 ... rotating drum,
4 heat exchanger, 5 intake port, 6 exhaust port, 7 intake and exhaust fan, 8 motor, 9 door, 10 door switch, 1
DESCRIPTION OF SYMBOLS 1 ... Clothing temperature thermistor, 12 ... Electrode sensor, 13 ... Exhaust temperature thermistor, 14 ... Room temperature thermistor, 15 ... Operation panel, 17 ... Wall, 18 ... Ventilation port, 19 ... Exhaust pipe, 20 ... Hot water heater, 21 ... Heat operation Valve, 22 hot water supply pipe, 23 hot water return pipe, 24 hot water temperature thermistor, 25 hot water temperature thermistor, 26 filter, 30 motor driver, 36
Filter blockage recognizing means, 37 ... drying operation stopping means

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-7-148395 (JP, A) JP-A-55-160598 (JP, A) JP-A-58-49198 (JP, A) JP-A-6-148 246097 (JP, A) JP-A-6-154492 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 58/28 D06F 58/02

Claims (8)

(57) [Claims] 1. A rotary drum for storing clothes, and a heat exchanger for heating air by the amount of heat of hot water supplied from a water heater, wherein the air heated by the heat exchanger is taken into the rotary drum by suction. In a clothes dryer that performs a drying operation of drying clothes by introducing through a mouth and discharging wet air through a filter from an exhaust port of the rotary drum, a hot water temperature for detecting a hot water temperature to the heat exchanger. Detecting means, tapping temperature detecting means for detecting tapping temperature from the heat exchanger, and a difference between a temperature detected by the tapping temperature detecting means and a temperature detected by the tapping temperature detecting means during execution of the drying operation. A filter blockage recognizing means for recognizing that the filter is closed when the value becomes equal to or less than a predetermined value; and stopping the drying operation when the filter blockage recognizing means recognizes that the filter is closed. You And a drying operation stopping means. 2. A room temperature detecting means for detecting a temperature in a room in which the clothes dryer is installed, wherein the filter blockage recognizing means increases the predetermined value as the detected temperature of the room temperature detecting means decreases. The clothes dryer according to claim 1, wherein the clothes dryer is set to: 3. A rotary drum for accommodating clothes, and a heat exchanger for heating air by the amount of heat of hot water supplied from a water heater, and the air heated by the heat exchanger is taken into the rotary drum by suction. In a clothes dryer that performs a drying operation of drying clothes by introducing through a mouth and discharging wet air through a filter from an exhaust port of the rotary drum, a hot water temperature for detecting a hot water temperature to the heat exchanger. Detecting means, tapping temperature detecting means for detecting tapping temperature from the heat exchanger, and a difference between a temperature detected by the tapping temperature detecting means and a temperature detected by the tapping temperature detecting means during execution of the drying operation. And a filter blockage recognizing means for recognizing that the filter is closed when the value becomes equal to or less than a first predetermined value, wherein the filter is used when the filter blockage recognizing means recognizes that the filter is closed. To the person A clothes dryer comprising a notification means for performing notification. 4. The clothing according to claim 3, further comprising a drying operation stopping means for stopping the drying operation when the filter closing recognition means recognizes that the filter is closed. Dryer. 5. A drying operation stopping means for stopping the execution of the drying operation when a predetermined time has passed since the filter closing recognition means recognized that the filter was closed. The clothes dryer according to claim 3, wherein 6. A room temperature detecting means for detecting a temperature in a room in which the clothes dryer is installed, wherein the filter blockage recognizing means detects the first temperature as the detected temperature of the room temperature detecting means is lower.
4. The method according to claim 3, wherein the predetermined value is set to a large value.
The clothes dryer according to any one of claims 1 to 5. 7. A method according to claim 2, wherein a difference between a temperature detected by said hot water temperature detecting means and a temperature detected by said hot water temperature detecting means is set to a value smaller than said first predetermined value during execution of said drying operation.
4. The clothes dryer according to claim 3, further comprising a drying operation stopping means for stopping the drying operation when the drying operation becomes equal to or less than a predetermined value. 8. A room temperature detecting means for detecting a temperature in a room where the clothes dryer is installed, wherein the filter blockage recognizing means detects the first temperature as the detected temperature of the room temperature detecting means is lower.
The predetermined value is set to a large value, the drying operation stopping means,
The clothes dryer according to claim 7, wherein the second predetermined value is set to a larger value as the detected temperature of the room temperature detecting means is lower.