JPH04126196A - Dehumidifying clothes-dryer - Google Patents

Abstract

PURPOSE:To prevent humidity and temperature in a room from being increased by using a water-cooling fan type heat exchanger and completely housing it in a circulation duct so as to eliminate the sealed part of a rotary part. CONSTITUTION:A drum 7 to be a drying chamber is supported by a loop-shaped drum supporting plate 5 and a rear bearing and forms a hot air exit 8 composed of a lot of holes on the back. A circulation path 10 is formed from a vent hole 12 of a fan casing 11 to a hot air entrance 9 formed at the lower part of the drum supporting plate 5. A heater 13 faces to the hot air entrance 9 and is housed in a duct 14 fixed to the drum supporting plate 5. A heat exchange type wavy fan 16 is pivotally supported in the fan casing 11. A water suction valve 20 is provided at an upper part in a machine frame 1, and cooling water is guided to a nozzle 22 by a hose 21. The drum 7 and the wavy fan 16 are rotated by a motor 18 at the upper part in the machine frame 1. Air heated by the heater 13 enters the drum from the hot air entrance, evaporates the moisture of clothes and is sucked from the hot air exit to the wavy fan. The cooling water is poured into the wavy fan, passed through the recessed parts of blades, cools circulating air and is drained by an exhaust port 17 of the circulation path together with condensed water.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dehumidifying clothes dryer, and particularly to a water-cooled fan heat exchanger.

[Prior Art] Currently, the mainstream of dehumidifying clothes dryers is an air-cooled type using a fan-type heat exchanger. The reason for this is that fan-type heat exchangers function as a blower fan and a heat exchanger in one part, so they can be made cheaply and compactly. However, this air-cooled, fan-type heat exchanger also has the following drawbacks. Since the heat exchanger is a rotating body, the rotating part cannot be completely sealed, and the air on the circulating side leaks as steam into the room on the cooling side. This amount of leakage corresponds to about half of the amount of water contained in the material to be dried. In addition, the waste heat after heat exchange is also discharged into the room, so if it is used in a room that is not ventilated, the temperature and relative humidity will increase by as much as 30%, causing discomfort.

Additionally, when the outside temperature is low at night or in winter, there is a temperature difference with the room, which causes dew to form on the walls.

[Problem to be solved by the invention]

Although conventional technology is cheaper and takes up less space, air from the circulation side leaks into the room as steam during drying, making the room moist.
Furthermore, the exhaust heat after heat exchange is discharged into the room, raising the temperature of the room unnecessarily, without considering the effect on each room, and the feeling of comfort is lacking.The purpose of the present invention is to This is an advantage of the prior art because it eliminates the drawbacks of the prior art, such as making the room humid and increasing the temperature unnecessarily. The aim is not only to be inexpensive and take up less space, but also to allow for comfortable drying.

Another object of the present invention is to enable it to be used as a heat exchanger for high heat sources that will increase in size to 200 cm in the future.

[Means to solve the problem]

In order to achieve the above objective, a water-cooled fan-type heat exchanger is used, and by completely storing the fan-type heat exchanger in the circulating air path and eliminating the seal part of the rotating part, the circulating air is almost completely circulated to the outside. It can suppress the leakage of water as steam, eliminating the rise of damp air in the room. In addition, since it is a water-cooled heat exchanger, the waste heat after heat exchange is discharged as water instead of air.
It does not raise the temperature of the room.

To accommodate a 200V high heat source, by using a water-cooled fan type heat exchanger, the amount of cooling water to the heat exchanger can be increased depending on the heat source, and the temperature can be controlled to be low. There is sufficient margin for the discharge amount of tap water. In the case of an air-cooled fan-type heat exchanger, in order to increase the amount of cooling air in the heat exchanger, the number of rotations of the fan must be increased, which causes problems such as increased noise.

[Effect]

The water-cooled fan heat exchanger has almost the same shape as the air-cooled fan heat exchanger, which is currently the mainstream.The difference from the air-cooled fan heat exchanger is that the cooling of the heat exchanger is Instead of cooling with air, the only difference is that water is poured into the center of the fan-type heat exchanger, and the function of the heat exchanger is no different from conventional air-cooled types, and there is no chance of malfunction. Regarding cooling by pouring water, there is no malfunction as the amount of condensed water has simply increased. Also, if water is cut off during drying, the temperature will rise high without cooling. By monitoring and controlling this with both hardware and software, abnormal conditions can be prevented.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. A back cover 2 is fixed to the rear surface of the machine frame 1. A clothing entrance/exit 3 formed on the front of the machine frame 1, a door 4 for opening and closing this entrance/exit 3 located on the front of the machine frame 1, a metal annular drum support plate 5 fixed to the machine frame 1, and the machine frame. A drum 7 serving as a drying chamber is rotatably supported by a rear bearing 6 disposed at the rear of the drum 1. A hot air outlet 8 consisting of a large number of holes is formed on the rear surface of the drum 7. A circulation path 10 is formed which communicates with a hot air intake 9 formed at the lower part of the drum support plate 5 from a vent 12 of a fan casing 11. 25
indicates a fan casing cover. A honeycomb-shaped heater 13 made of a positive temperature coefficient thermistor is provided facing the hot air population 9, and is housed in an L-shaped duct 14 fixed to the drum support plate 5. A heat exchange type wave fan 16 is rotatably supported in the fan casing 11 by a support shaft 17 via metal. A water intake valve 20 is arranged in the upper part of the machine frame 1,
Cooling water 1 is supplied to the cooling water nozzle 22 by the cooling water hose 21.
5 is guided.

A motor 18 is disposed in the upper part of the machine frame 1, and the drum 7 is rotated by a pulley including an idler pulley and a belt 24, and the waveform fan 16 is also rotated by the pulley belt. A filter 19 is installed from the inside so as to cover the hot air outlet 8 of the tram 7.

The operation will be explained below. When operating, first open the door 4, store the dehydrated clothes in the drum 7, and turn on the power (not shown), which heats the motor 18 and heater 13 and generates hot air on the drum support plate 5. The hot air enters the drum 7, evenly hits the rotating clothes, evaporates the water contained in the clothes, becomes high temperature, collects the cloth waste with the filter 19, and then enters the hot air outlet 8 of the drum 7. It is sucked into the corrugated fan 16 inside the lift fan casing 11. Here, the cooling water 15 is supplied to the corrugated fan 1 from the water intake valve 2o through the cooling water hose 21 and from the cooling water nozzle 22.
The cooling water 15 is poured into the inside of the blades of the waveform fan 1 by the centrifugal force caused by the rotation of the waveform fan 16.
The high-temperature, high-humidity circulating air passes through the valleys of the blades 6 and is cooled to below the dew point temperature and condensed, and is then expelled along with the condensed water to the outer periphery of the blades. The repelled condensed water and cooling water 15 pass through the fan casing 11 and enter the circulation path 1.
Water is drained from the drain port 17 of 0.

Therefore, the corrugated fan 16 serves as both a heat exchanger and a blower.
Unlike an air-cooled fan-type heat exchanger, the sealing part of the corrugated fan 16 can be eliminated, and steam, which is the circulating air, can be prevented from leaking out of the machine. Moreover, since the heat after heat exchange is also drained outside the machine as cooling water 15, the temperature of the room does not rise unnecessarily.

FIG. 3 shows an embodiment in which cooling water 15 is poured onto both sides of the wave-shaped fan 16. Since the water poured into the wave fan 16 flows through the valleys of the blades, if the water is poured on one side as shown in FIG. 4, only half of the wave fan 16 will be cooled.

On the other hand, in the case of water injection on both sides, the entire corrugated fan 16 is cooled, as shown in FIG. 5, and the cooling effect is enhanced.

FIG. 6 shows an embodiment in which the circulation side and the cooling side are separated by a partition plate 26. The cooling water 15 is drained from the drain hole 2 of the partition plate.
7 to the circulation path side and is drained from the drain port 17 of the circulation path 10. The same effect can be obtained in this case as well.

〔Effect of the invention〕

According to the present invention, it is possible to eliminate seals between the rotating parts on the circulation side and the cooling side of the heat exchange fan.

It is circulating air. Steam leakage to the outside of the machine can be almost completely eliminated, greatly increasing dehumidification performance.

Furthermore, since the waste heat after heat exchange is discharged as water, the temperature of the room can be prevented from increasing unnecessarily. Furthermore, the noise from the dryer was the main cause. Wind noise from cooling air is also unnecessary in water-cooled systems, reducing noise. Therefore, a dryer that does not require ventilation can be provided. It will also be effective as an exchanger for high heat sources that will be upgraded to 20OV in the future, as the temperature can be kept down sufficiently with just the amount of cooling water.

[Brief explanation of drawings]

Fig. 1 is a sectional side view of a clothes dryer showing an embodiment of the present invention, Fig. 2 is a sectional view of a main part of an embodiment of the invention, and Fig. 3 is a main part of an embodiment of the invention. 4 is a state diagram of the cooling water of the present invention, FIG. 5 is a state diagram of the cooling water of the present invention, and FIG. 6 is a side sectional view showing an embodiment of the present invention. 11...Fan casing, 15...Cooling water, 16
Waveform fan, 20... Water intake valve, 21... Cooling water hose, 22... Cooling water nozzle, 26... Partition plate, 27... Water drain hole.

Claims (1)

[Claims] 1. A drum rotatably supported within an outer frame, a circulating air path passing through the drum via a heater to obtain hot air, a blower device for circulating air in the air path, and condensation. In a dehumidifying clothes dryer, which is equipped with a heat exchanger disposed in the circulating air passage and an electric motor that drives this air blower and the drum, a waveform fan that also functions as an air blower and a heat exchanger is used. A dehumidifying clothes dryer that exchanges heat by flowing cooling water through a fan. 2. A dehumidifying clothes dryer according to claim 1, wherein the cooling water is applied to the inner periphery of the blades of the corrugated fan.