JPS64232Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a clothes dryer, and more particularly to a device for indicating when drying is approximately completed.

[Prior art]

Conventionally, clothes dryers were controlled by detecting the exhaust temperature with a temperature-sensitive variable resistance element, but the equipment was complicated and expensive, and there was a risk of failure after long-term use. One thing I couldn't escape.

[Purpose of invention]

This invention eliminates the conventional drawbacks and provides a display device that has a simple structure and is free from failures.

[Embodiment] Detailed description will be given below with reference to the drawings. In the drawing, 1 is an outer box of a clothes dryer, which has a clothes input port 4 that opens into a drum 5 (described later) on the front side, and supports the clothes dryer at the rear opening. It bridges the plate 17 and covers the rear lid 2.

Reference numeral 5 denotes a clothes storage drum, whose front opening fits into the outer periphery of the clothes input port 4, and whose shaft 6 protruding from the rear side fits into a bearing 7 of a support plate 17 so as to be rotatably supported. The drum 5 also has a large number of hot air inflow holes 8 around the opening on the front surface, and an exhaust hole 9 at the center of the rear surface. A hot air guide plate 10 is fixed to the inner surface of the front wall of the outer box 1 facing the hot air inflow hole 8, and a sealing member 11 such as felt is interposed between the outer periphery of the plate and the drum 5. Reference numeral 12 denotes a hot air duct which includes a heater 13, one end of which communicates with the hot air guide plate 10, and the other end of which is opened to the outside through an outside air intake port 14 on the front surface of the outer box. 15 is a filter that covers the outside air intake port 14, and 16 is a filter guard that holds the filter.

Reference numeral 18 denotes a fan cover fixed to the center of the rear surface of the support plate 17, which cooperates with the support plate 17 to form a fan casing for a fan 19. The fan 19 is rotatably supported by the fan cover 18 via a shaft 20. The support plate 17 has an intake port 17a facing the exhaust hole 9, and a seal member 22 is interposed between the outer periphery of the intake port 17a and the drum 5. The fan cover 18 also has an exhaust port 18a that opens to the outside. Reference numeral 23 denotes a filter that covers the exhaust hole 9 from the inside of the drum, and 24 denotes a filter guard.

Reference numeral 3 denotes a door that opens and closes the clothes slot 4, and is attached to the front surface of the outer box on one side with a hinge. The door 3 consists of an outer peripheral frame part 3a and a transparent window 3b provided inside the outer peripheral frame part 3a. 29 is a thermochromic body; 30 is a plate member made of stainless steel, which has better thermal conductivity than the synthetic resin of the transparent window 3b, and is laminated on the back surface of the drum so as to cover the thermochromic body 29 from the inside of the drum;
Then, it is fitted into a recess 3c formed on the inner surface of the drum of the transparent window 3b and bonded. For example, one method is to fit the plate member 30 to which the thermochromic material 29 is attached or coated into the recess 31c, and to create a gap as shown in FIG. 2 between the thermochromic material 29 and the transparent window 3b. It is glued to make an S.

25 is a motor, and pulley 2 at one end of its output shaft
6 and the outer periphery of the drum 5, the drum 5 is rotated, and the fan 19 is rotated via a belt (not shown) hung between a pulley 28 at the other end of the output shaft and a pulley 21 of the shaft 20. Rotate. Juan 19
As the drum rotates, outside air is taken in through the outside air intake port 14, heated by the heater 13, and then supplied into the drum 5 through the hot air inflow hole 8. Together with the moisture coming out of the clothes to be dried, it is sucked into the fan casing through the filter 23, the exhaust hole 9, and the intake port 17a, and then is sucked into the fan casing through the exhaust port 18.
Released to the outside from a. As shown in FIG. 3, the temperature of the air discharged from the drum 5 rises rapidly at the beginning, and hardly rises while the moisture is being evaporated from the clothes to be dried. Then, just before the drying ends, the temperature rises rapidly, and when it reaches the temperature T, it ends. Therefore, by setting the color change temperature of the thermochromic body 29 to approximately the above temperature T,
The completion of drying can be indicated by a change in color. The thermochromic body 29 returns to its original color when the temperature drops.

During the drying operation, the clothes to be dried come into contact with the plate member 30, but since the plate member is made of stainless steel, there is almost no wear. Further, since the temperature-sensitive color-changing body 29 and the plate member 30 are fitted into the recess 3c, there is no possibility that drying will catch on their ends and cause them to peel off.

[Effect of idea]

As described above, this invention can indicate the end of drying with an extremely simple structure, and in devices that stop operation using a timer, it is possible to easily know from the outside whether the drying is overdrying or underdrying due to excess or deficiency of the set time. It is something that can be done. Moreover, the plate member 30, which has better thermal conductivity than the transparent window, and the thermochromic body 29 are mounted on the inner surface of the drum of the transparent window 3b in an overlapping manner, and between the thermochromic body 29 and the transparent window 3b. Since the gap S is formed, the display is more influenced by the temperature inside the drum through the plate member 30 than by the outside temperature outside the transparent window, and accurate display operation can be performed. Therefore, conventional methods such as JP-A-57-
As shown in Publication No. 139400 or Japanese Unexamined Patent Publication No. 192599/1989, it is possible to simply apply a temperature-sensitive color-changing material to the inner surface of the transparent window, adhere a temperature-sensitive color-changing tape, or furthermore, Compared to a door made of a color-changing material, it is less affected by the outside temperature and can more accurately display the degree of dryness depending only on the temperature inside the drum.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of a clothes dryer in which this invention was implemented, Figure 2 is an enlarged cross-sectional view of the central part of the door, Figure 3 is a rear view of the same part, and Figure 4 is a graph showing temperature changes. be. In the figure, 1 is an outer box, 3 is a door, 3b is a transparent window, 4 is a clothes slot, 5 is a drum, 29 is a thermochromic body, 3
0 is a plate member.

Claims (1)

[Scope of utility model registration request] A clothes storage drum 5 is rotatably provided in an outer box 1, and a clothes inlet 4 opening into the drum 5 is formed on the front surface of the outer box 1, and a door 3 that covers the clothes inlet 4 is provided in an openable/closable manner. A recess 3c is formed on the inner surface of the drum of the transparent window 3b, and a thermochromic body 29 that changes color at a temperature near the end of drying is provided in the recess 3c.
The temperature-sensitive color-changing body 29 is covered from the inside of the drum and a plate member 30 having better thermal conductivity than the transparent window 3b is laminated and bonded, and furthermore, between the temperature-sensitive color-changing body 29 and the transparent window 3b. A clothes dryer characterized in that a gap S is formed in the clothes dryer.