JPH10328496A - Clothing drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent starting defect when an air-tight holding felt is humidified and frozen and to enlarge a usage condition by executing only a hot blow operation in a state where a drum is stopped when a temp. sensor senses that peripheral temp. is lower than previously set temp. at the time of starting the operation. SOLUTION: When operation starting time peripheral temp. is the low one, the air-tight holding felt 17-2 has a probability to be humidified and frozen. When the temp. sensor 21 mounted in a mainbody senses that temp. is lower than certain fixed temp., a controller 18 controls a motor 4 to be rotated backwards at the time of starting the operation, a one-way clutch 4-3A is in lost motion so as to permit the drum 3 to be in the stop state, only a heat exchange fan 6 is rotated backwards and hot blow is supplied into the drum 3. When the air-tight holding felt 17-1 is fused by hot blow when it is frozen by the humidity so as to enable starting the drum 3 and, after that, the motor 4 is changed-over into a normal rotary direction so as to do normal operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a clothes dryer,
More specifically, the present invention relates to an improvement in a clothes dryer in which even when the felt for keeping the airtightness of the drum bearing portion is moist and frozen at a low ambient temperature, the starting failure is eliminated.

[0002]

2. Description of the Related Art When the felt for maintaining the airtightness of a drum bearing part is exposed to moisture and freezes when the ambient temperature is low, particularly at 0 ° C. or less, the sliding resistance of the bearing part becomes large and the starting failure occurs. And there were times when I could not drive. Also, even if the engine is started, ice or the like may damage the drum bearing.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate poor start-up even when the airtight holding felt of a drum bearing is moist and frozen at a low ambient temperature, and to expand operating conditions. It is an object of the present invention to provide an improved clothes dryer.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a clothes dryer for drying clothes by supplying warm air to a rotating drum in which clothes are stored and in which the ambient temperature at the start of operation is lower than a preset temperature. Is detected by the temperature sensor,
This is achieved by a configuration in which only the hot air operation is performed with the drum stopped.

According to the present invention, when the temperature sensor detects that the ambient temperature is lower than the preset temperature at the start of operation, only the hot air operation is performed with the drum stopped, so Even if the felt for maintaining the airtightness of the drum bearing part is moist and frozen at low temperatures, this freezing is thawed by the warm air, and the sliding resistance of the drum bearing part becomes the normal sliding resistance. The rotation of the drum becomes possible.

As a specific means for stopping the drum when the temperature sensor detects that the ambient temperature is lower than a preset temperature at the start of the operation, a motor for driving a drum belt for transmitting a driving force to the drum is used. A one-way clutch is incorporated in the bearing of the drum drive pulley fixed to the shaft of the motor, and the one-way clutch is rotated by rotating the motor in the opposite direction to normal operation, and an electromagnetic clutch is also incorporated in the bearing of the drum drive pulley Alternatively, a configuration may be adopted in which the electromagnetic clutch is disengaged when the temperature sensor detects that the ambient temperature at the start of operation is lower than the preset temperature. Further, two motors for driving the drum and for driving the fan are separately provided, and the motor for driving the drum is stopped when the temperature sensor detects that the ambient temperature is lower than a preset temperature at the start of operation. You may.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of a clothes dryer according to one embodiment of the present invention.

Inside the outer frame 1, a drum 3 for storing clothes is provided. It is rotatably supported via a drum bearing 3-1 on a drum shaft 9-1 fixed to a drum fan support plate 9 attached to the rear of the body 1.

The drum 3 has a motor base 4-
1 is rotated via a drum driving pulley 4-2 by a motor 4 attached through the drum pulley 13 and a drum belt 15 tensioned by a tension applying pulley 13 to stir the clothes. The drum support 17 and the drum 3
Is airtightly held by the airtight holding felt 17-2 attached to the second member. Inside the drum 3, a baffle 3-3 for efficiently stirring clothes protrudes. A so-called one-way clutch 4-3A, which is fixed and driven in one rotation direction and idles on the other side, is incorporated in the bearing of the drum drive pulley 4-2, and stirs ordinary clothes. It is driven during the operation of, and idles when the rotation is reversed.

Reference numeral 2 denotes a door which is opened and closed when clothes are taken in and out of the drum 3, and is supported by the outer frame front plate 1-1.

A fan casing 8 and a heat exchange fan 6 housed in the fan casing 8 are provided behind the drum exhaust port 3-2 of the drum 3. The fan casing 8 is fixed to a drum fan support plate 9, and the fan 6 is a fan shaft 9-fixed to the drum fan support plate 9.
2 rotatably supported. The fan 6 is rotated by the motor 4 via a fan drive pulley (not shown) attached to the motor 4 and a fan belt 10. The fan 6 divides the fan casing 8 into a circulation side A and a cooling side B on the front and back by a partition plate 7, circulates the air in the drum 3 on the circulation side A, and a rear side of the outer frame body 1 on the cooling side B. This is a so-called heat exchange type of a front and rear double wing type in which a back plate intake port 14-1 and a back plate exhaust port 14-2 provided in a back plate 14 for covering outside air suck and exhaust outside air.

5 is a heating element for supplying hot air,
It is installed below the drum support 17 and immediately before the drum intake port 17-1. Reference numeral 16 denotes a lint collecting device which collects dust such as lint generated from clothes in the drum 3, and is provided immediately before the drum exhaust port 3-2 of the drum 3 and has a collecting net 19-1. It is detachably attached to the filter support base 19.

The casing discharge port 8 of the fan casing 8
-1 and the drum intake port 17-1 are connected while maintaining airtightness by a circulation duct 11 and a circulation duct 12 having a drain port 11-1 on the way. Then, the air in the drum 3 is changed from the drum 3 to the lint collecting device 16 to the drum exhaust port 3-2.
→ fan casing 8 (circulation side A) → casing discharge port 8-1 → circulation duct 11 → circulation duct 12 → heating element 5 →
Drum air inlet 17-1 (warm air outlet) → flows to drum 3 to form a circulation air flow path.

Reference numeral 18 denotes a control device which controls the operation of the motor 4, the heating element 5, and the like, and is attached to the outer frame front plate 1-1 via the panel 18-1.

The portion of the partition plate 7 will be described in detail.
A so-called labyrinth having a configuration in which a comb-shaped rib integrally provided on the outer circumference of the fan 6 and a rib having the same cross-section provided on the partition plate 7 are unevenly engaged with each other in a non-contact state. Adopts a seal configuration.

In the above configuration, when the clothes dryer is operated, the motor 4 and the heating element 5 are energized and the motor 4 is turned on.
Starts rotating, the drum 3 and the fan 6 are respectively rotated, the heating element 5 generates heat, and warm air is supplied into the drum 3.
The clothes stored and agitated in the drum 3 are dried.

The moisture evaporated from the clothes passes through the lint collecting device 16 together with the circulating wind, passes through the drum exhaust port 3-2,
It flows into the circulation side A of the fan casing 8. Also, outside air flows into the cooling side B of the fan casing 8 from the back plate intake port 14-1 of the back plate 14, and is exhausted from the back plate exhaust port 14-2. In the outer peripheral portion of the fan 6, the circulating air and the cooling air are separated by a labyrinth seal portion with the partition plate 7 without entering and exiting. Heat is exchanged between the two, and the moisture contained in the circulating wind is condensed and becomes water, flows into the circulation duct 11 from the casing discharge port 8-1 of the fan casing 8, and is discharged out of the machine through the drain port 11-1. . In this way, a series of drying operations of the clothes dryer are continued. Dust such as lint generated from the clothes in the drum 3 in the series of drying steps is collected by the lint collecting device 16.

Reference numeral 21 denotes a temperature sensor for detecting an ambient temperature at the start of operation.

The above is the drying step in the normal operation. However, when the ambient temperature is low at the start of the operation, particularly at 0 ° C. or lower, the felt 17-2 for keeping the airtightness may be wet and frozen. When the temperature sensor 21 mounted in the main body detects that the temperature is lower than a certain fixed temperature, the controller 18 rotates the motor 4 in the reverse direction at the beginning of the operation. When the one-way clutch 4-3A idles, the drum 3 is stopped, and only the heat exchange fan 6 rotates in the reverse direction to supply warm air into the drum 3. Thereby, even if the moisture of the airtight holding felt 17-1 is frozen, it is melted by the warm air, and the sliding resistance of the drum bearing becomes the normal sliding resistance, so that the drum 3 can be started. If the motor 4 is set in the normal rotation direction, normal operation can be performed.

The temperature at which the drum 3 is stopped when the temperature sensor 21 detects that the ambient temperature is lower than the preset temperature at the start of the operation is not necessarily 0 ° C.
In consideration of the case where the airtight holding felt 17-2 of the drum bearing part is in the middle of thawing and the ambient temperature exceeds 0 ° C,
There is no problem in setting the temperature to 1 ° C. or 2 ° C. with some margin.

As a specific means for stopping the drum 3 when the temperature sensor 21 detects that the ambient temperature at the beginning of the operation is lower than a preset temperature, the one-way clutch 4-3A is used instead of the one-way clutch 4-3A as shown in FIG. 3 or a separately provided drum driving motor 4A and a heat exchange fan driving motor 4B as shown in FIG. 3 so that the ambient temperature at the beginning of operation is lower than a preset temperature. May be stopped when the temperature sensor 21 detects the temperature.

[0023]

According to the present invention, even if the felt for keeping the airtightness of the drum bearing part is moist and frozen at the time of low ambient temperature, the start-up failure is eliminated and the operating conditions are expanded. Clothes dryer can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a clothes dryer according to the present invention.

FIG. 2 is a longitudinal sectional view showing a second embodiment of the dryer of the present invention.

FIG. 3 is a longitudinal sectional view showing a third embodiment of the dryer of the present invention.

[Explanation of symbols]

3 ... Drum, 4 ... Motor, 4A ... Drum drive motor,
4B: motor for driving a heat exchange fan, 4-2: drum drive pulley, 4-3: one-way clutch, 4-3B: electromagnetic clutch, 15: drum belt, 17-2: felt for maintaining airtightness, 21: temperature sensor .

Claims (4)

[Claims] 1. A clothes dryer for drying clothes by supplying warm air to a rotating drum in which clothes are stored and when a temperature sensor detects that an ambient temperature is lower than a preset temperature at the start of operation. A clothes dryer in which only hot air operation is performed with the drum stopped. 2. A one-way clutch according to claim 1, wherein a one-way clutch is incorporated in a bearing portion of a drum drive pulley fixed to a shaft of a motor that drives a drum belt for transmitting a driving force to the drum, and the ambient temperature is set in advance at the start of operation. When the temperature sensor detects that the temperature is lower than the temperature, the motor is rotated in a direction opposite to the normal operation to idle the one-way clutch, and only the fan for supplying hot air is rotated. Clothes dryer. 3. An electromagnetic clutch according to claim 1, wherein an electromagnetic clutch is incorporated in a bearing portion of a drum drive pulley fixed to a shaft of a motor for driving a drum belt for transmitting a driving force to the drum, and the ambient temperature is set in advance at the start of operation. A clothes dryer characterized in that when a temperature sensor detects that the temperature is lower than the temperature, the electromagnetic clutch is disengaged and only a fan for supplying hot air is rotated. 4. The drum driving device according to claim 1, further comprising a drum driving motor and a fan driving motor provided separately, and when the temperature sensor detects that the ambient temperature is lower than a preset temperature at the start of operation. A clothes drying machine characterized by stopping a motor for use and rotating only a fan for supplying warm air.