JPH0779907B2 - Clothes dryer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a dehumidifying type clothes dryer.

2. Description of the Related Art Conventionally, this type of clothes dryer is disclosed in, for example, Japanese Patent Laid-Open No. 58-67997.
As shown in the publication, the structure was as shown in FIG. In FIG. 3, reference numeral 1 is an outer frame of the clothes dryer, 2 is a clothes storage, that is, a drum rotatably installed in the outer frame 1, and 3 is a door for putting an object to be dried in the drum 2,
4 is a heat exchange type blower having both functions of air blow and heat exchange,
The heat exchange-type blower has a substantially ring-shaped outer periphery and a V-shaped cross section.
A V-shaped flexible seal member 5 is fixed. 6 is a motor for rotating the heat exchange blower 4, 7 is a back plate that covers the rear surface of the outer frame 1, 8 is a partition wall that forms ventilation passages for the air flow on both sides of the heat exchange blower 4, and heat is generated together with the back plate 7. The exchange-type blower 4 is included to form a casing having a spiral chamber 9. 10 is a circulating wind tunnel that guides hot and humid drying air to the heater 11, 12 is an exhaust port for exhausting the sucked cooling air, and 13 is a drain port for discharging dehumidified water to the outside of the machine. a and b show the flows of the drying air and the cooling air, respectively.

When the motor 6 rotates and the heat exchange type blower 4 rotates in the clothes dryer, air flows a and b are generated, and the hot and humid drying air for drying the clothes is cooled by the blade portion of the heat exchange type blower 4. It is cooled by the use air and dehumidified. The dehumidified drying air is blown into the drum 2 again heated by the heater 11, and thus the clothes are dried.

Problems to be Solved by the Invention With such a conventional configuration, the heat exchange type blower 4 rotates at high speed, and thus requires high mechanical strength and accuracy. Further, in the vicinity of the air blow-out portion on the outer peripheral portion of the impeller of the heat exchange type blower 4, a seal structure for separating two air flows flowing on both sides of the impeller is required, and reliability is deteriorated due to wear of the seal or the like depending on long-term use. In addition to problems, there were problems such as increased sliding resistance.

The present invention realizes a heat exchange structure advantageous in terms of strength and accuracy, and has high seane performance without a special seal structure,
Moreover, it is an object of the present invention to provide a clothes dryer having a high heat exchange capacity and a high dehumidification capacity.

Means for Solving the Problems A clothes dryer according to the present invention is provided with a drum for storing clothes, a drying air passage containing a heater, and a drying air circulating in the drying air passage. A cooling air path, a drying fan that circulates the air in the drying air path, and a cooling fan that blows the cooling air in the cooling air path and is arranged to face the drying fan. A partition plate that divides the two paths and is located between both fans, and a heat exchanger that forms grooves in a substantially radial shape from the vicinity of the outer periphery of each fan on both surfaces of the partition plate,
The cross section between the groove portions of the heat exchanger has a corrugated shape, and a fan outer periphery provided in the air inlet portion of the heat exchanger on at least one side of the drying air side and the cooling air side and a heat exchanger near the outer periphery thereof are provided. It is characterized in that the wall of the connecting path is projected to the partition plate side.

Function According to this configuration, the drying fan and the cooling fan blow the drying air and the cooling air, and the both air are heat-exchanged by the stationary heat exchanger. Also, since the fan case type of the heat exchanger air inlet is projected on the partition plate side with a gap with the partition plate, the air flow flows into the heat exchanger at a high speed and the air flow is By flowing along the protrusion of the fan case, the direction of the flow is bent and flows into the depth of the protrusion of the heat exchanger.

Embodiment One embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The same components as those in the conventional example are designated by the same reference numerals, detailed description thereof will be omitted, and only different points will be described. Reference numerals 14 and 15 denote a drying fan and a cooling fan independently provided on the rotary shaft 16, and a partition plate 17 that separates the fans 14 and 15 from each other. A hole through which the rotary shaft 16 penetrates is provided at the center. . 18 is a heat exchanger provided on the outer peripheral portion of the fan of the partition plate 17,
It has a thin plate wave shape having substantially radial projections 19 protruding on both sides. The heat exchanger 18 may be integrated with the partition plate 17 or may be a separate body. A backing plate 20 is provided outside the cooling fan 15 to guide cooling air smoothly to the heat exchanger 18. A back plate that closes the back plate 20 and the rear part of the outer frame 1.
21 together form a cooling air side fan case that contains the cooling fan 15 and the heat exchanger 18. Reference numeral 22 denotes a drying air side fan case that contains the drying fan 14 and the heat exchanger 18. As shown in detail in FIG. 2, the contact plate 20 projects the cooling air inlet portion 23 of the heat exchanger 18 from the partition plate 17 with a gap h on the partition plate side.

The drying fan 14 supplies the drying air to the drying air path which forms a closed path by the drum 2, the drum facing side of the heat exchanger 18, the heater 11 and the circulation wind tunnel 10. The cooling air path is composed of an intake port 24, a heat exchanger 18 and an exhaust port 25,
Outside air is taken in by the cooling fan 15.

With this configuration, when the power source is turned on and the motor 6 is rotated, and the drying fan 14, the cooling fan 15 and the drum 2 are rotated by this rotational force, the drying air flow a and the cooling air are generated by the respective fans. Flow b occurs. The drying air is heated by the heater 11 and then the clothes in the drum 2 are dried, and then is blown by the drying fan 15 to the drum-facing side of the heat exchanger 18. It passes through the circulation wind tunnel 10 and again faces the heater 11. The cooling air flow b is the air outside the machine that has been taken in through the intake port 24, is blown by the cooling fan 15 toward the outside facing surface of the heat exchanger 18, and is then exhausted outside the machine through the exhaust port 25. Then, both air flows adjacent to each other with one thin plate constituting the heat exchanger 18 sandwiched therebetween, and at this time, heat is transferred from the high-temperature and high-humidity drying air to the low-temperature cooling air,
The drying air is cooled, and the moisture contained therein is condensed into water droplets and drained from the drain port 13. The drying air is dehumidified and returns to the drum 2 to dry the clothes.

In the clothes dryer of this embodiment, since the heat exchanger 18 is stationary, the structure can be greatly simplified.

Since the gap between the partition plate 17, the cooling fan 15 and the drying fan 14 is narrow and long, no special sealing device is required to separate the cooling air and the drying air.

By making the cooling air inlet portion 23 of the heat exchanger 18 of the backing plate 20 that constitutes the cooling air side fan case project toward the partition plate side, the inflow area of the cooling air into the heat exchanger 18 becomes smaller. The cooling air flows into the heat exchanger 18 at a high speed. Further, the cooling air flows along the contact plate 20 to change its flow direction at the inlet 23 of the heat exchanger 18, and the cooling air also flows to the bottom wall 19a of the protrusion 19 of the heat exchanger 18. From these, the heat transfer from the wall surface to the air becomes extremely good, the effective heat transfer area is expanded, the heat exchange capacity is remarkably improved, and as a result, the dehumidification performance can be improved.

In this embodiment, only the contact plate 20 forming the fan case on the cooling air side is projected to the partition plate side, but if a projecting portion is also provided on the air inlet part of the fan case on the drying air side, Highly effective. Further, in this embodiment, the cooling air side fan case is composed of the backing plate and the back plate, and the backing plate is projected to the partition plate side.However, the configuration of the fan case projecting to the partition plate side is not limited to this. The present invention is not limited to this, and the point is that the heat exchanger and the cooling fan are included to form the ventilation passage for the cooling air. Further, the configuration of the heat exchanger 18 is not limited to the thin plate wave shape, and may be, for example, a structure in which projections that are integral with or separate from the flat plate are radially provided on both surfaces.

EFFECTS OF THE INVENTION As described above, the clothes dryer of the present invention is provided with a drying fan and a cooling fan, a partition plate provided between the two fans, and a substantially radial shape provided near the fan outer peripheral portion of the partition plate. A heat exchanger having a protrusion, a drying fan, a cooling fan, and a fan case enclosing the heat exchanger, and a fan of the heat exchanger air inlet portion on at least one side of the drying air side and the cooling air side. Since the case wall is projected to the partition plate side with a gap with the partition plate, air flows along the protruding part of the fan case, the direction of the flow is bent, and flows into the deep part of the protruding part of the heat exchanger, As a result, the effective heat transfer area of the heat exchanger can be increased, and the heat transfer from the wall surface to the air can be made extremely excellent, so that the heat exchange capacity can be remarkably increased and the dehumidification performance can be improved. Further, since the heat exchanger is stationary, the structure is simple and the seal structure is unnecessary.

[Brief description of drawings]

FIG. 1 is a side sectional view of a clothes dryer according to an embodiment of the present invention, FIG. 2 is a detailed sectional view of the same part, and FIG. 3 is a side sectional view of a conventional clothes dryer. 2 ... Drum, 6 ... Motor, 11 ... Heater, 14 ... Drying fan, 15 ... Cooling fan, 17 ... Partition plate, 18 ...
… Heat exchanger, 20 …… Patch plate, 21 …… Back plate, 23 …… Air inlet part of heat exchanger

Claims (1)

[Claims] 1. A drum for accommodating clothes, a drying air passage accommodating a heater, a cooling air passage for cooling drying air circulating in the drying air passage, and a drying air passage. A cooling fan that circulates the air, a cooling fan that blows the cooling air in the cooling air path, and a cooling fan that is arranged to face the drying fan, and that divides the two paths and both fans. And a heat exchanger that forms grooves radially from the vicinity of the outer periphery of each fan on both sides of the partition plate, and the cross section between the groove portions of the heat exchanger is corrugated and dried. Drying of clothes by projecting the wall of the route connecting the outer periphery of the fan provided at the air inlet of the heat exchanger on at least one side of the cooling air side and the cooling air side and the heat exchanger near the outer periphery to the partition plate side Machine.