JPH01300996A - Drying apparatus - Google Patents

Abstract

PURPOSE:To protect a heater and improve thermal efficiency, by removing moisture from air with moisture obtained from dried objects, with a heat exchanging type fan, to circulate the air, and by heating the air to exchange heat, with a heat exchanger heated by the heater outside a circulating line, on the way of the circulation. CONSTITUTION:From air A with moisture obtained from dried objects in a containing chamber 4a, moisture is removed by a heat exchanging type fan 17, and at the same time, the air A is circulated in a circulating line B. On the way of the circulating line B, a heat exchanger 31 is set, and the air after the moisture is removed is heat-exchanged with air in an exhaust air line 35 heated by a heater 40, and is heated. Accordingly, the heater 40 can be set outside the circulating line B, and can be protected against moisture and water content infiltrated into the circulating line B. Besides, an airport in the exhaust air line 35 is for heated exhaust air heat-exchaned with high-temperature air on the side of the circulating line B, by the heat exchanging type fan, and thermal efficiency is improved by the use of exhaust air heat.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a drying device having a function of drying objects to be dried in a storage chamber by using warm air circulating in the storage chamber.

(Prior art) The structure of this type of hot air circulation type drying device has been widely used in clothes dryers, drum type washer dryers, etc., and the general structure is that A heat exchange type fan device is provided to circulate the air dehumidified while dehumidifying the air, and a heater is provided in the middle of the circulation path of the circulating air, and the heater heats the circulating air to dry the material to be dried. It has become.

(WU problem to be solved by the invention) In the conventional configuration described above, since the heater is located in the circulation path of the circulating air, the moisture in the storage room in which wet clothes etc. are stored passes through the circulation path and charges the heater. There is a risk that the parts will get wet and the insulation will deteriorate. In particular, in drum-type washer/dryers equipped with a washing function, there is a risk that detergent foam may fill the circulation path due to incorrect use of detergent during washing operations, and this may wet the live parts of the heater. This was a major cause of this.

The present invention attempts to solve these problems, and therefore, its purpose is to provide a drying device that can prevent moisture and water inside a storage chamber from coming into contact with the heater and improve insulation. be.

[Structure of the Invention] (Means for Solving the Problems) The drying device of the present invention includes a storage chamber for storing objects to be dried, a circulation path for circulating air in the storage chamber, and air flowing through the circulation path. a heat exchange type fan device that dehumidifies air by exchanging heat with air taken in from outside the machine; an exhaust path for discharging the air that has exchanged heat with the air on the circulation path side;
A heater that heats the air flowing through the exhaust path, and a heat exchanger that heats the air on the circulation path side by exchanging heat between the air heated by the heater and the dehumidified air on the circulation path side. It is equipped with

(Function) During drying operation, the air that has removed moisture from the material to be dried is circulated while being dehumidified by the heat exchange type fan device. During this circulation process, the dehumidified air is passed through a heat exchanger, where it is heated by exchanging heat with the air on the side of the air path heated by the heater.

Therefore, unlike conventional methods, the heater can be located outside the circulation path, preventing moisture from entering the circulation path.
It can protect the heater from moisture. Moreover, the air on the exhaust route side, which serves as a heating medium for the air on the circulation route side, is the exhaust gas that has been heated by exchanging heat with the high temperature air on the circulation route side in a heat exchange type fan device, and this exhaust gas is heated by the heater. Since it exchanges heat with the air on the circulation path side, the heat of the exhaust gas can be used effectively and thermal efficiency can be improved.

(Example) Hereinafter, an example in which the present invention is applied to a drum-type washer/dryer will be described with reference to FIG.

Reference numeral 1 denotes an outer box of a drum-type washer/dryer, and a tub 2 is supported inside the outer box via an elastic support mechanism 3.

A rotating drum 4 constituting a storage chamber 4a is disposed inside the tub 2, and a rotating shaft 5 fixed at the center of both left and right walls of the drum 4 is provided.
, 6 are fixed to both side walls of the tub 2, and bearings 5 a ,
6 supported by a. A small hole 8 is formed in the left side wall and body of the rotating drum 4, which serves as both a hot air flow hole and a dehydration hole. Reference numeral 9 denotes a double-shaft motor fixed to the outer bottom of the tub 2, and is configured such that its speed can be changed by changing the number of poles, for example. The left rotation shaft 9a of the motor 9 is connected to a reduction mechanism 10, and a pulley 11 is fitted to an output shaft 10a of the reduction mechanism 10 that projects leftward, and a pulley 11 is fitted to the left rotation shaft 5 of the rotation drum 4. A belt 13 is passed between the pulley 12 and the attached pulley 12. Further, a fan drive shaft 14 is mounted on a bearing 15 on an extension line of the rotation shaft 9b on the right side of the motor 9.
The shafts 9b and 14 are rotatably supported by a clutch mechanism 16 during drying operation. On the other hand, 17 is a heat exchange type fan device arranged on the right side wall of the tub 2, which includes a casing 18 and a fan that also serves as a heat exchanger and is arranged so as to partition the inside of the casing 18 into two left and right chambers 19 and 20. It consists of 21. A hot air outlet 23 is formed on the right side wall of the rotating drum 4 in correspondence with the intake port 22 of the left chamber 19, and the interior of the rotating drum 4 is supplied to the left chamber 19 through the hot air outlet 23 and the intake air r122. It communicates within. In addition, an intake port 24 is formed in the center of the side wall of the right chamber 20, and this intake port 24
4 faces an intake port 25 formed on the right side of the outer box 1. A pulley 26 provided at the center of the fan 21
A belt 28 is passed between the fan drive shaft 14 and a pulley 27 fitted to the right end of the fan drive shaft 14. On the other hand, 29
is a circulation path for circulating the air inside the rotating drum 4, and this circulation path 29 is connected to the discharge port 19a of the chamber 19 on the left side of the casing 18 through a connecting duct 30, and a heat exchanger in a heat exchanger 31 to be described later. It is constructed by connecting a vibrator 32 and a connecting duct 33 in order, and the connecting duct 33 on the outlet side is connected to the tub 2.
It is connected to a hot air supply port 34 formed at the upper part of the left side wall. Reference numeral 35 denotes an exhaust path that guides air exhausted from the right chamber 20 of the casing 18, and this exhaust path 35 connects to an exhaust duct 36 connected to the right chamber 20, a connecting duct 37, an outer case 38 of the heat exchanger 31, and It is constructed by connecting exhaust pipes 39 in sequence. A heater 40 is disposed at the inlet of the outer case 38 of the heat exchanger 31 in the exhaust path 35 . Thus, the heat exchanger 31 is connected to the outer case 38.
A heat exchange vibrator 32 is passed through the center of the inside, and a fin-shaped heat sink 41 is provided protruding from the outer periphery of the heat exchange vibrator 32 to improve heat exchange efficiency. still,
42 is an exhaust port formed on the upper left side of the outer box 1 corresponding to the exhaust pipe 39; 43 is a hot air outlet 23 of the rotating drum 4;
The lint filter 44 is a drain vibe for discharging dehumidified water from the bottom of the casing 18.

Next, the operation of the above configuration will be explained. When clothes and detergent are put into the rotating drum 4 through the clothes entrance (not shown) at the top of the outer box 1, water is supplied into the tub 2, and the washing operation is started, the motor 9 is started and its rotation is started. The force is a reduction mechanism 10
is decelerated and transmitted to the rotating drum 4. This results in
The rotating drum 4 is rotated to agitate the clothes inside it up and down, and the agitating action washes the clothes with detergent. In this detergent washing process and the rinsing process 2 dehydration process described later, the clutch mechanism 16 is maintained in an open state, the fan drive pulley 14 is not rotated, and therefore the fan 21 is not rotated either. After the detergent washing process is completed, water is drained and water is resupplied, and the clothes are rinsed by rotating only the rotary drum 4 as described above. After the rinsing process is completed, the water is drained, the motor 9 is rotated at high speed, and the rotating drum 4 is rotated at high speed to dehydrate the clothes.

After this dehydration is completed, the drying process begins. In this drying process, the motor 9 is operated in a state in which the heater 40 is energized, the clutch mechanism 16 is connected, and the rotating shaft 9b of the motor 9 and the fan drive shaft 14 are connected. This results in
The rotational force of the motor 9 is transmitted to the fan 2 via the fan drive shaft 14.
1, and the fan 21 is also rotated together with the rotating drum 4. The rotation of the fan 21 causes the air inside the rotating drum 4 to flow into the hot air outlet 23 as shown by arrow A. Inlet port 2
2 into the left chamber 19 of the casing 18,
As shown by the arrow B, the air is discharged into the tub 2 from the fg air supply port 34 through the circulation path 2p, and is discharged into each small hole 8 of the rotating drum 4.
The air inside the rotary drum 4 is circulated by flowing into the rotary drum 4 from the inside.

In parallel with this air circulation, air from outside the aircraft flows into the air intake port 25.
24 into the chamber 20 on the right side of the casing 18 by arrow C.
The air is sucked in as shown in , and here, it exchanges heat with the humid high-temperature air flowing through the left chamber 19 to dehumidify it. Due to this heat exchange (dehumidification), the air in the right-hand chamber 20 flows along the exhaust path 35 as shown by arrows E and F while increasing in temperature and is exhausted. 35, after being heated by the heater 40, it flows into the outer case 38 of the heat exchanger 31 as shown by arrow E, and here, the circulation path 29 flows inside the heat exchange vibe 32.
It exchanges heat with the dehumidified air on the side and heats it. The thus heated air on the side of the circulation path 29 is supplied into the rotating drum 4 in two series to remove moisture from the clothes to be dried and dry them. At the same time, the rotating drum 4 is rotated to turn the clothes upside down, thereby drying the clothes evenly.

According to the above configuration, although the air flowing in the circulation path 29 is heated from outside the circulation path 29 via the heat exchanger 31, unlike the conventional structure, the heater 40 is not connected to the circulation path 29. The heater 4o can be located outside, and even if detergent foam, moisture, or moisture enters the circulation path 29 during a washing operation, the heater 4o can be protected from the infiltration of the bubbles, moisture, or moisture. , can improve insulation properties. Moreover, the air on the exhaust path 35 side, which serves as a heating medium for the air on the circulation path 29 side, is the exhaust that has been heated by exchanging heat with the high temperature air on the circulation path 29 side in the heat exchange type fan device 17. The circulation path 29 is heated by the heater 4o.
Since it exchanges heat with the air on the side, the heat of the exhaust gas can be used effectively, improving thermal efficiency and saving power.

In the above embodiment, a tubular heat exchanger having a heat exchange vibe 32 with a heat sink 41 was used as the heat exchanger 31, but instead of this, for example, a countercurrent heat exchanger with laminated corrugated plates or a A cross-flow heat exchanger, a rotary heat exchanger, or the like may also be used. Alternatively, the rotating drum 4 and the fan 21 may be driven by separate motors.

In addition, the present invention can be similarly applied to a dryer (without a washing function) in addition to the drum-type washer/dryer as in the above embodiment, and various other modifications are possible.

[Effects of the Invention] As is clear from the above description, the present invention has a configuration in which the air flowing in the circulation path is heated from outside the circulation path via a heat exchanger. It can be placed outside the circulation path and protects the heater from moisture and water that enters the circulation path.
Can improve insulation. Moreover, the air on the exhaust route side, which serves as a heating medium for the air on the circulation route side, is the exhaust gas that has been heated by exchanging heat with the high temperature air on the circulation route side in a heat exchange type fan device, and this exhaust gas is heated by the heater. Since the heat exchanger exchanges heat with the air on the circulation path side, the heat of the exhaust gas can be used effectively, improving thermal efficiency and saving power.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention. In the drawing, 2 is a bucket, 4 is a rotating drum, 9 is a motor, 10 is a reduction mechanism, 16 is a clutch mechanism, 17 is a heat exchange type fan device, 21 is a fan, 29 is a circulation path, 31 is a heat exchanger, 32 35 is a heat exchange pipe, 35 is an exhaust path, 40 is a heater, and 41 is a heat sink.

Claims (1)

[Claims] 1. A storage room for storing items to be dried, a circulation path for circulating the air in this storage room, and a heat exchange fan that dehumidifies the air flowing through this circulation path by exchanging heat with the air taken in from outside the machine. a device, an exhaust path for discharging air that has exchanged heat with the air on the side of the circulation path, a heater that heats the air flowing through this exhaust path, and after dehumidifying the air heated by the heater and the side of the circulation path. A drying device comprising a heat exchanger that heats the air on the circulation path side by exchanging heat with the air.