JPS60241493A - Clothing dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an improvement in a clothes dryer that removes moisture and heat from hot and humid exhaust gas discharged from a rotating drum.

[Prior art]

A conventional clothes dryer is shown in US Pat. No. 3,333,461'+. This clothes dryer has a rotatable drum inside the outer frame, a clothes loading/unloading port on the front side of the 5-rotation drum, and an electric motor installed at the rear of the outer frame so as to face the rear side of the rotary drum. The low-speed rotating part of the electric motor supports the rear part of the rotating drum, and the high-speed rotating part of the electric motor supports a double-sided fan for heat exchange, which is straddled so as to face the rear part of the rotating drum. The fan casing, which surrounds the double-sided fan for heat exchange, is equipped with a fixed partition plate to draw hot air into the fan casing. The side fan casing part and the cold air side fan casing part are separated, and the warm air side fan casing part is composed of one side of a fixed partition plate, the outer surface of the ridge of the rotating drum, and the outer ring part, and the cold air side fan casing part is fixed. It is composed of the other surface of the partition plate, the inner surface of the rear plate of the outer frame, and another outer circumferential ring part, and a heater placed inside the hot air side fan casing part is provided opposite to the inlet of the rotating drum, and the heater is placed at the rear of the outer frame. The plate has an exhaust port near the outer periphery of the cold side fan casing and an intake port near the center.

Clothes dryers with such a configuration have the following problems.

(1) Since the air inlet and outlet are provided at the rear of the rotating drum, it is difficult for the drying air to reach deep inside the rotating drum, making it difficult to dry clothes.

(2) Since the heater is placed near the outer periphery of the fan casing on the warm air side, some of the water condensed during heat exchange comes into contact with the heater and evaporates. (This is caused by the centrifugal force of the hot air fan.) (3) The hot and humid air discharged from the outlet of the rotating drum comes into contact with the high-speed and low-speed rotating parts of the motor.
This is not good as it will actually heat up the motor which needs cooling. Moisture is also bad because it reduces the insulation of the motor.

(4) Since the electric motor is placed at the rear of the rotating drum, the depth of the clothes dryer increases.

(5) In order to exchange more heat, it is necessary to increase the radial length of both the warm and cold fan sections. However, because the double-sided fan for heat exchange is attached to the electric motor, both the warm and cold fan sections are placed outside the outer periphery of the electric motor, which reduces the amount of space available for heat exchange. .

[Purpose of the invention]

The present invention aims to provide a clothes dryer that does not have the above-mentioned problems.

[Summary of the invention]

The present invention includes an air inlet provided on the front side of a rotatable rotating drum, an air outlet provided on the rear side of the rotating drum, and a heater that heats the air flowing into the rotating drum from the air inlet. , consists of a heat exchange fan placed in the outer frame behind the rotating drum, and an electric motor that drives the heat exchange fan.The heat exchange fan separates two fluids, warm air and cold air, and Consists of a double-sided fan that transfers heat between fluids; one side of the double-sided fan is a warm side fan section, the other side is a cold side fan section, and the suction section in the center of the warm side fan section is opposite to the outlet of the rotating drum. A fan belt pulley is provided on the suction section side which is the center of the cold air side fan section, a fan belt pulley is provided on the electric motor, and a belt is stretched between the fan bell 1~boo and the fan belt pulley. be.

According to this configuration, the following actions and effects can be expected.

(1) The air that dries the clothes flows in from the inlet at the front of the rotating drum and exits from the outlet at the rear.
The air is distributed inside the rotating drum and can dry the clothes well.

(2) Since the heater that heats the air flowing into the rotary drum 11 is not placed on the outside of the warm side fan part of the heat exchange fan, it condenses during heat exchange and evaporates when it touches the blown heater. Nothing like that will happen.

(3) The rotation of the electric motor is transmitted to the heat exchange fan via a transmission means consisting of a fan belt pulley provided on the heat exchange fan and a belt stretched across the fan belt pulley provided on the electric motor. Therefore, the electric motor is not adversely affected by the high temperature and humidity that the heat exchange fan is exposed to.

(4) Since the electric motor that drives the heat exchange fan is not placed at the rear of the rotating drum, the depth of the clothes dryer does not become large.

(5) The double-sided fan for heat exchange has a configuration in which the warm side fan section of the heat exchange fan faces the outlet of the rotating drum, and the fan belt pulley is provided on the suction side of the cold side fan section. The radial length of both the hot and cold fan sections can be made larger than that of a fan that is attached to an electric motor.

(6) Since the fan belt pulley is located in a place where it is not exposed to hot and humid airflow, it is not only convenient for the durability of the belt, but also reduces the frictional heat between the fan belt pulley and the belt, which is caused by the air flowing into the cold side fan section. Since the heat is dissipated by the fan belt pulley and the belt, the transmission means including the fan belt pulley and the belt can be kept in good condition.

[Embodiments of the invention] An embodiment of the present invention will be described below based on the drawings.

In the drawings, "" is an outer frame, and 2 is a rotary drum rotatably provided within the outer frame 1. The rotary drum 2 stores clothes 24 to be dried, and is moved by an electric motor 3. The rotational force of the electric motor 3 is transmitted at low speed to the rotating drum 2 via the belt 25. Reference numeral 4 denotes a door provided at the entrance for loading and unloading clothes; 5 indicates an inlet for drying air formed by drilling a large number of small holes in the front wall of the rotating drum 2; 0 A large number of small holes are provided in the rear wall of the rotating drum 2; A stream formed by drilling a C outlet [''6
A filter 7 is provided in front of the outflow 1j 6 to collect cloth waste generated during drying of clothes. 8 is a fan casing of a heat exchange fan 9. The fan casing 8 is placed on the back surface of the rotating drum 2. The fan casing 8 is provided with a hot air inlet 11a and a cold air inlet 11b facing each other.

The warm air side inlet]-1a is opposed to the outlet 6 of the rotating drum 2. The felt drawn outward from the outlet 6 is tightly joined to the rear of the rotating drum 2 and the front of the fan casing 8. This close contact creates a seal.

Reference numeral 21 denotes an intake duct, the intake side of which is provided at the opening of the outer frame 1. An intake filter 22 is provided at the inlet on the intake side. The discharge side of the intake duct 21 is the rotating drum 2
It is provided so as to face the inlet 5 of the inlet.

A felt 10' provided on the outer periphery of the discharge side of the intake duct 21 is tightly bonded to the rear side surface of the rotating tram 2. A seal is created by this close contact.

Reference numeral 23 denotes a heater provided inside the intake duct 21, which heats the air sucked in from outside the outer frame. The heated air becomes high-temperature drying air and flows into the rotating drum 2.

The heat exchange fan 9 described above is configured with a double-sided fan that separates two fluids, hot air and cold air, and performs heat transfer between the two fluids. This double-sided fan has a warm side fan section on one side of the partition wall 17 and a cold side fan section on the other side,
Both fan sections are placed back to back with a partition wall 17 in between. The warm air side fan section is located in the warm air passage 15 of the fan casing 8.
On the side, the cold air side fan sections are respectively placed on the cold air passage 16 side of the fan casing 8.

The partition wall 17 of the double-sided fan has a hot air passage 15 and a cold air passage 16.
This partition wall is used to exchange heat between warm and cold air.

Since the double-sided fan is of a centrifugal type, condensed water generated by heat exchange is splashed toward the outer peripheral inner wall of the fan casing 8 by the centrifugal force of the double-sided fan. Condensed water that collects below the fan casing 8 is collected in a water tray 20 provided below the rotating drum 2 through a drain pipe 19 provided below the fan casing 8 .

The electric motor 3 is placed below the outer frame 1. This electric motor 3
A drum belt pulley 8a is provided on one side of the rotating shaft, and a fan belt pulley 8b is provided on the other side. Belt 2 stretched around drum belt pulley 8 and rotating drum 2
The rotation of the electric motor 3 is transmitted to the rotating drum 2 via the rotary drum 5 .

The rotation of the electric motor 3 is transmitted to the heat exchange fan 9 via a belt 14 stretched between a fan belt pulley 8b of the electric motor 3 and a fan belt pulley 9a provided on the heat exchange fan 9.

The fan belt boo IJ 9a is attached to the rotating shaft 9b of the heat exchange fan 9. The rotating shaft 9b is supported at the center of the heat exchange fan 9, is located in the cold air side fan section, and is located at the cold air side inlet 1. of the fan casing 8. ]
b and extends to the outside of the fan casing 8. The fan belt pulley 9n is attached to the outside of the fan casing 8.

Since the heat exchange fan 9 is of a centrifugal type, the air sucked into the suction section at the center of the hot and cold fan sections of the double-sided fan is discharged toward the outer circumference by centrifugal force.

A suction part 13 for taking in cooling air is formed by making small holes in a back plate 12 provided on the back surface of the outer frame 1.

An exhaust port 18 is provided on the outer periphery of the fan casing 8 to exhaust hot and cold air.

The above has been a description of one embodiment of the present invention, mainly from the perspective of structure. Next, one embodiment of the present invention will be described from the perspective of operation.

First, the clothes 24 are placed in the rotating drum 2, s4 is closed, and the power is turned on. As the electric motor 3 rotates, the heater 23
heats up. The rotating drum 2 has a low speed and a heat exchange fan 9
rotates at high speed. The outside air 26 drawn into the intake duct 21 through the intake filter 22 is warmed by the heater 23 due to the suction force of the warm side fan section of the heat exchange fan 9 . The temperature becomes high and the drying air 27 flows into the interior of the rotary drum 2 from the inlet 5 of the rotary drum 2 . This drying air removes moisture from the clothes and becomes hot and humid air, which passes through the filter 7, the outlet 6, and the warm-air inlet 11a of the fan casing 8. The air then flows through the warm air passage 15 of the fan casing 8 and is exhausted from the exhaust port 18.

On the other hand, the outside air 29 sucked in from the suction part 13 of the back plate 12 by the suction force of the cold air side fan part of the heat exchange fan 9 is
The cold air passes through the cold air inlet 11b of the fan casing 8, flows through the cold air passage 15 of the fan casing 8, and is exhausted from the exhaust port 8.

In the operation of the heat exchange fan 9, hot and humid air and low temperature air flow back to back through the double-sided fan, so that heat is exchanged between the warm side fan section and the cold side fan section of the double-sided fan. . In other words, since the hot and humid air is cooled, condensed water forms in the fan section on the warm air side.

This condensed water.

The water is blown to the outer peripheral inner wall of the fan casing 8 by the centrifugal force of the fan, naturally collects below the fan casing 8, passes through the drain pipe 19, and collects in the water tray 20.

The hot and humid air is dehydrated to become warm air, which is exhausted together with cooling air as dehumidified air 30 from the exhaust port 18. - In this way, by using the double-sided fan 9 for heat exchange, it is possible to dehumidify hot and humid air without providing a separate heat exchanger.

The air for drying flows in through the inlet 5 provided at the front of the rotating drum 2 and exits from the outlet 6 provided at the rear of the rotating drum 2, so that it flows throughout the inside of the rotating drum 2. It turns out. The clothes in the rotating drum 2 can be dried evenly.

The heater 23 is separated from the heat exchange fan 9 by a rotating drum l,
Since the heat exchange fan 9 is provided in front of the heater 9, the condensed water generated at the heat exchange fan 9 will not be blown away by the centrifugal force of the fan and come into contact with the heater 9.

Since this heat exchange fan 9 is of a centrifugal type, condensed water is blown away radially. Since the fan 9 is placed within the fan casing 8, the blown away condensed water is received within the fan casing 8. This water naturally collects at the lower part of the fan casing 8 and is drained from the drain pipe 19, so the inside of the outer frame 1 will not get wet.

The rotational driving force of the rotating drum 2 and the heat exchange fan 9 is
Since it is configured to be taken out using a belt from the electric motor 3 provided on the side of the outer frame, the depth of the outer frame 1 can be reduced compared to a case where the electric motor is disposed at the rear of the rotating drum.

In addition, in a device in which the electric motor is installed at the rear of the rotating drum to directly drive the rotating drum, there is a problem in that the electric motor, which does not like heat, receives heat from the high-temperature exhaust from the rotating drum. By using the belt transmission method and separating the electric motor from the heat exchange fan, this problem can be resolved.

Since the fan belt pulley 9a is located on the cold air side fan section, it has the following advantages over a belt pulley that is provided on the warm air side fan section.

Since the belt 14 is not placed in a hot and humid place, the belt has good durability and the transmission friction between the belt 14 and the fan belt pulley 9a is maintained well. If the fan belt pulley is placed on the warm side fan section, an airtight means must be provided for the part where the belt exits from the fan casing. This becomes unnecessary.

Furthermore, heat is generated due to friction between the fan belt pulley 9a and the belt 14. This heat is cooled by the air flowing into the cold air fan section, so the belt 14 and fan bell 1 - pulley 9
a) It is possible to maintain good transmission friction.

The heat exchange fan 9 has both a fan function and a heat exchanger function. In order to improve its function as a heat exchanger, it is better to increase the radial direction.

If the heat exchange fan is attached directly to the electric motor, the fan part must be placed outside the outer periphery of the electric motor, avoiding the electric motor. For this reason, the length in the radial direction required for heat exchange cannot be increased.

By providing a fan belt pulley 9a on the cold air side fan section of the heat exchange fan 9 and adopting a belt transmission method, the fan section in the radial direction can be increased due to the absence of an electric motor, thereby increasing the heat exchange function. [Effects of the Invention] As described above, according to the present invention, the following effects can be achieved.
You can expect good results.

(1) The air that dries the clothes flows in from the inlet at the front of the rotating drum and exits from the outlet at the rear.
The air is distributed inside the rotating drum and can dry the clothes well.

(2) Since the heater that heats the air flowing into the rotating drum is not placed outside the warm side fan part of the heat exchange fan, water condensed and blown away during heat exchange may come into contact with the heater. There is no evaporation.

(3) The rotation of the electric motor is transmitted to the heat exchange fan via a transmission means consisting of a fan belt pulley provided on the heat exchange fan and a belt stretched across the fan belt pulley provided on the electric motor. Therefore, the electric motor is not adversely affected by the high temperature and humidity that the heat exchange fan is exposed to.

(4) Since the electric motor that drives the heat exchange fan is not placed at the rear of the rotating drum, the depth of the clothes dryer does not become large.

(5) The warm air side fan section of the heat exchange fan faces the outlet of the rotating drum, and the fan belt boob is provided on the suction section side of the cold air side fan section, so both surfaces for heat exchange The radial length of the warm and cold side fan sections can be made larger than when the fan is attached to an electric motor.

(6) Since the fan belt pulley is located in a place where it is not exposed to hot and humid airflow, it is not only convenient for the durability of the belt, but also allows the frictional heat between the fan belt pulley and the belt to flow into the fan section on the cold air side. Since heat is dissipated through the air, the transmission means including the fan belt pulley and belt can be kept in good condition.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view showing the configuration of an embodiment of a clothes dryer according to the present invention. DESCRIPTION OF SYMBOLS 1... Outer frame, 2... Rotating drum, 9... Heat exchange fan, 5... Air inlet, 6... Outlet, 23...
...Heater, 8...Fan casing, 1.1 a.
・・Warm air side inflow L1, ], ], b...Cold air side inlet,
3...Wia machine, 9a...Fan belt pulley, 8
b... Belt pulley for fan.

Claims (1)

[Claims] 1. A rotating drum that is rotatably provided within the outer frame, an air inlet provided on the front side of the rotating drum, an air outlet provided on the rear side of the rotating drum, and an air inlet provided on the rotating drum from the air inlet. It consists of a heater that heats the air flowing into the drum, a heat exchange fan placed behind the rotating drum and inside the outer frame, and an electric motor that drives the heat exchange fan. It is composed of a double-sided fan that separates the two fluids and performs heat transfer between the two fluids. One of the double-sided fans is a warm side fan section and the other is a cold side fan section. A fan belt pulley is provided on the suction part side, which is the center of the cold air fan part, and a fan belt pulley is provided on the electric motor, and the belt is stretched between the fan belt pulley and the fan belt boob. Clothes dryer installed.