JPH0380899A - Clothing dryer - Google Patents

Abstract

PURPOSE:To prevent the discoloration, deformation and shrinkage of clothing and to allow drying by forming the dryer into construction of a heat source part to lower hot wind temp. in the case of drying of cloths and the clothing weak to heat. CONSTITUTION:A heater case 15 contg. a semiconductor heater 16 for heating the dry air after a heat exchange is connected to a fan case 17 housing a heat exchange type fan 13 via a duct 18. The air c for drying passes the semiconductor heater 16 in the heater case 15 and is fed as the hot wind into a drum 12. The semiconductor heater 16 is so disposed to the heater case 15 that the section of the semiconductor heater 16 has a diagonal shape with the surface 20a of the hot wind port 20 of the front plate 19 of the drum and, therefore, the heater is uniformly applied with the blast sent into a ceramister element 16a. Since the distance between the surface of the ceramister 16a and the hot wind port 20 is long, the direct influence of the radiation heat of the ceramister heater 16a on the clothing does not arise.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a clothes dryer that uses a semiconductor heater to dry articles to be dried, such as clothes.

2. Description of the Related Art Conventionally, as shown in FIG. 6, a clothes dryer of this kind has a structure in which a drum 2 is rotatably supported within an outer frame 1 of the dryer.
A heat exchange type blower 3 having a heat exchange function and an air blowing function is installed at the rear of the machine. That is, the heat exchange type blower 3 blows drying air a and cooling air, flows both airs on both sides, and exchanges heat between the two airs. 4 is a motor that drives the heat exchange type blower 3 and the drum 2; 5 is a heater case that houses a semiconductor heater that heats the dry air after heat exchange; and a lid 7 that houses the heat exchange type blower 3. It is connected to the engine tube 7 via a duct 8.

During operation, the drying air a passes through the semiconductor heater 6 in the heater case 6 and is sent into the drum 2 as hot air. As shown in FIG. 7, the semiconductor heater 6 is a semiconductor heater having positive resistance-temperature characteristics, and is generally constructed by combining a ceramic element 6a and a radiation fin 8b in multiple stages in one unit. This semiconductor heater 6 has a hot air port 10 provided in a drum front plate 9 that rotatably supports the front wall of the drum 2.
The hot air heated by the semiconductor heater 6 is placed in the heater case 6 parallel to the surface 10a of the semiconductor heater 6.
and is fed into the drum 2. However, this hot air does not reach high temperatures, and if you dry cloth or clothing with low heat resistance, such as blankets, in a dryer, the fibers of the clothing may become discolored or shrink due to the high temperature. In particular, when the drying machine is temporarily stopped just before drying, the radiant heat of the semiconductor heater 6 can cause damage to the clothes, and such drying of clothes has been prohibited.

Problems to be Solved by the Invention In such conventional dryers, cloths and clothing with low heat resistance can cause damage such as discoloration, deformation, and shrinkage of the fibers, so drying of certain items is prohibited.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a heat source structure for a clothes dryer that allows the clothes dryer to dry cloth and clothes with low heat resistance. Furthermore, it is intended to utilize the heat amount of the semiconductor heater in a highly efficient manner.

Means for Solving the Problems In order to achieve the above-mentioned object, a first technical means of the present invention is that the semiconductor heater serving as the heat source is a radiation fin.

This semiconductor heater has a plurality of ceramic elements having positive characteristics sandwiched between terminal plates and formed in a line, and the semiconductor heater is arranged so that the cross section of the semiconductor heater is oblique with respect to the hot air outlet surface, which constitutes the front wall of the rotating drum. This is installed inside the heater case.

The second technical means is to arrange the semiconductor heater by dividing it into two parts, one semiconductor heater has a lower output value than the other semiconductor heater, and the semiconductor heater with the lower output value has a lower output value than the other semiconductor heater. It is arranged at a lower position in the drum than the semiconductor heater, and when drying clothes with a low heat resistance temperature, power is applied only to the semiconductor heater with a low output value.

Effect: In the first technical means described above, hot air is efficiently generated by uniformly passing air to the semiconductor heater.

By reducing the amount of heat per unit area to the hot air outlet of the housing, it is possible to send low temperature hot air into the drum storage and eliminate the influence on the heat of the clothes. It is possible to prevent thermal effects on clothing caused by radiation from the semiconductor heater during periods of sludge and stoppage.

With the second technical means, hot air can be efficiently sent into the drum warehouse, and low-temperature, soft hot air can be applied uniformly to the clothes, and time can be shortened with low output, making it efficient. Semiconductor heater can be used.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. As shown in Figures 1 and 2, the outer frame 11 of the dryer
A heat exchange type blower 13 is installed at the rear of the drum 12 and has a heat exchange function and an air blowing function.
has been established. That is, the heat exchange type blower 13 blows drying air C and cooling air d, and also flows both airs on both sides to exchange heat between the two airs. 14 is a motor that rotationally drives the heat exchange type blower 13 and the drum 12; 15 is a heater case that houses a semiconductor heater 16 that heats the dry air after heat exchange; 9, which houses the heat exchange type blower 13; It is connected to the fan case 17 via a duct 18. During operation, drying air C passes through the semiconductor heater 18 in the heater case 7.16 and is delivered as hot air into the drum 12.

The semiconductor heater 16 has a plurality of ceramistor elements 161 having positive resistance characteristics formed in a row, which are sandwiched from a terminal plate 16c via heat radiation fins 16b made of aluminum on both sides. The semiconductor heater 16 is arranged so that the cross section of the semiconductor heater 16 is oblique (an oblique part of α) with respect to the surface 20a of the hot air outlet 2o of the drum front plate 19 that forms the front wall of the drum 12 and rotationally supports the drum 12. Heater case 1
It is placed in 5. Reference numeral 21 denotes an insulating spacer that insulates and supports the semiconductor heater 16 in a fixed manner. Semiconductor heater 1
By making the cross section of 6 oblique, the ceramic element 1
The air sent to the radiating fins 16b is uniformly given a volume of air, and is efficiently distributed to the ceramic element 16a.
Heat is exchanged with

In addition, since the distance I between the surface of the ceramic metal element 18a and the hot air outlet 20 is long, the radiant heat of the ceramic metal element 16a does not directly affect clothing when the vehicle is stopped at - time.

The semiconductor heater 16 is divided into two units as shown in FIG. 3, and one semiconductor heater 16-1 has a lower output value than the other semiconductor heater 16-2. The heater 16-1 is disposed at a lower position in the drum 12 than the other semiconductor heater 16-2, and power is applied only to the semiconductor heater 16-1, which has a low output value, when drying cloth or clothing that has a low heat resistance temperature. That's what I do.

During operation, the drum 12 rotates in the y direction as shown in Figure 4.
Since the semiconductor heater 16-1 is in the lower position, when the cloth 21 rotates, there is a chance that the hot air will pass through the clothing as indicated by the arrow Z.
9, especially if it is in the lower position when the amount of heat is small,
Creates a uniform temperature distribution within the two drums, improving drying efficiency.

FIG. 5 shows, as an example, the relationship between drying time and temperature using a Meyer blanket of 1 to 9, comparing lower position A and upper position B of the heater applied to the same structure when the heater input is 600 W. It can be seen that the drying time at the lower position A is shorter than that at the upper position B. The lower position A is the position of the semiconductor heater 16-1, and the upper position B
indicates the position of the semiconductor heater 1°6-2.

Effects of the Invention As is clear from the above embodiments, the present invention provides a heat source that lowers the hot air temperature when drying heat-sensitive cloth or clothing such as a blanket or the like. This structure prevents discoloration and deformation of clothes even when they are close to dry.

It becomes possible to dry without shrinkage. In addition, by appropriately arranging the semiconductor heater, it is possible to provide a clothes dryer that exhibits extremely great effects, such as being able to obtain efficient drying performance with low output.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a clothes dryer according to an embodiment of the present invention, FIG. 2 is an external perspective view of the same semiconductor heater, FIG. 3 is an arrangement diagram of the semiconductor heater of the same main part, and FIG. 4 is the same main part. Figure 6 is a diagram showing drying performance characteristics due to differences in heater position, Figure 6 is a vertical cross-sectional view of a conventional clothes dryer, and Figure 7 is a perspective view of a conventional semiconductor heater. be. 11... Outer frame of the dryer, 12... Drum, 13... Heat exchange type blower, 16...
・Heater case, 16...Semiconductor heater, 16
a...Ceraminuta element, 16b...Radiating fin, 16c...Terminal board, 19...
・Drum front plate, 20... songs/hot air outlet.

Claims (2)

[Claims] (1) A rotating drum for a clothes dryer, a semiconductor heater having positive resistance temperature characteristics, a heater case that houses the semiconductor heater, and a fan that ventilates the semiconductor heater and blows hot air into the rotating drum. , the semiconductor heater has a plurality of ceramistor elements having positive temperature characteristics formed in a line and sandwiched between heat dissipation fins and a terminal plate, and the semiconductor heater has a hot air outlet surface constituting the front wall of the rotating drum, A clothes dryer in which the semiconductor heater is installed inside the heater case so that the cross section is oblique. (2) The semiconductor heater is divided into two units, one semiconductor heater has a lower output value than the other semiconductor heater, and the heater with a lower output value is placed in a rotating drum with a lower output value than the other semiconductor heater. 2. The clothes dryer according to claim 1, wherein the clothes dryer is arranged at a lower position and is configured to apply power only to the semiconductor heater having a low output value when drying cloth or clothing having a low heat resistance temperature.