JPS6144040B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to clothes dryers, and more particularly to drum type clothes dryers.

Drum-type clothes dryers are configured to blow hot air into the drum to quickly dry the clothes in the drum. The hot air is normally sent into the drum from around the clothing entrance/exit provided on the front of the main body case, but even under normal conditions, this hot air reaches a temperature of around 80°C, making it difficult for the ventilation path to be filled with clothing, etc. When it is blocked and the amount of ventilation is reduced, the temperature can reach over 100℃. As is clear from this, the clothing entrance/exit gets quite hot, and if your hand touches the clothing entrance/exit when putting in or taking out clothes, you may get burned.

The present invention has been made in view of the above, and its purpose is to provide a safe clothes dryer that prevents temperature rise at the clothes entrance and exit, and prevents burns when loading and unloading clothes. .

The main point of the description of some embodiments of the present invention is that a cooling passage is provided around the outer periphery of the clothing opening and is configured to achieve the above object.

An embodiment of the present invention will be described below based on the drawings. The overall configuration will be explained with reference to Figure 1.
1 is the main body case 1, which is made by bending a steel plate into a square cylinder shape.
A main body frame 2 whose ends are fixed by welding, a front frame 3 fixed to the front surface of the main body frame 2 and having a front opening 3-1, and a rear frame 4 also fixed to the rear surface of the main body frame 2. It is configured. Reference numeral 5 indicates a plurality of legs attached to the main body frame 2, which are used when the drying device is placed in an upright position directly on the floor. Reference numeral 6 denotes an intake port formed in the front frame 3, and 7 a louver detachably attached to the front surface of the intake port 6, which holds an intake filter 8 having an intake net on its surface. Reference numeral 9 denotes a front case made of synthetic resin that is airtightly attached to the back surface of the front frame 3 with an annular packing 10, and forms an entrance 11 for clothing. A door 12 is attached to the front frame 3 by a hinge (not shown) so as to be openable and closable, and is composed of a transparent plate 13 and an outer peripheral frame 14 that supports the transparent plate 13. Also, this door 1
2 is the annular packing 10 described above, which is connected to the entrance 1;
1 and maintains airtightness. 15 is a warm air guide fitted into the outer periphery of the entrance/exit 11. As is clear from FIG. 2, the front case 9 has a heat source mounting window 16 on its upper part, and this heat source mounting window 1.
6, a heat source attachment boss 17 provided on the upper side of the bearing ring portion 1, a heat source hooking member 18, and two supporting bosses 19-1 below the outer periphery of the entrance/exit port 11.
9. A control component mounting portion 20, a door switch mounting portion 21, and a heat-resistant plate mounting hole are provided integrally. That is, all the components required for the drying device can be attached to the front case 9, a sliding support piece that rotatably supports the drum can be attached, and the hot air guide 15 can also be easily installed. It can be attached, and the structure is designed to reduce the number of parts and improve ease of assembly. Further explaining FIG. 2, 22 is a heat source assembly, for example, as shown in FIG. 4, there is a positive resistance temperature characteristic element (hereinafter simply referred to as a heating element) 23 having a large number of honeycomb-shaped passages, and electrode plates that sandwich this. 24, 25, and these electrode plates 24,
25 to the heat source base 26 in common
It further comprises a heating element 23 and a spring member 28 that applies appropriate contact pressure between the two electrode plates. The heating element 23 is made of a material whose resistance increases rapidly when the temperature exceeds a certain level, thereby avoiding the occurrence of a fire due to an abnormal temperature rise. And heat source assembly 2
2 is attached to the mounting window 16 by locking the lower end to the hook part 18 and fixing the upper part to the boss 17 with a screw (not shown). Furthermore, since the heat source assembly 22 is equipped with a mounting window 16 whose upper part is inclined toward the back, the air sucked in from the lateral end of the intake port 6 flows laterally and efficiently as shown in FIG. Space 31 flowing toward the heat source assembly 22 side
is formed. That is, this space 31 is formed between the air intake port 6 and the heat source assembly 22 in a triangular shape when viewed from the side, and all the air sucked from the air intake port 6 is transferred to the heat source assembly through this space 31. This improves the overall drying efficiency. Furthermore, since the heating element 23 is mounted with the upper part inclined backward, a large area heating element 23 can be used without increasing the vertical dimension. You can increase the amount. Reference numeral 32 designates a heat-resistant plate that is fitted into the mounting hole 30 and is integrally formed with two supporting bosses 32-1. The heat-resistant plate 32 is made of a material with higher heat resistance than the front case 9, such as glass fiber-reinforced polypropylene, and has a heat deformation temperature of about 150°C. The front case 9 has a heat distortion temperature of
Generally manufactured from polypropylene at around 90°C.
By providing the heat-resistant plate 32 in a portion of the front case 9 near the heat source assembly 22 in this way, the problem of thermal deformation is eliminated, and the material of the front case 9 can be made cheaper. Further, since deformation of the front case 9 itself can be prevented, the airtightness between the front case and the drum can be maintained at the desired performance. Reference numeral 33 denotes a back cover that covers the heat source assembly 22, and is attached by engaging a hole 35 provided in the back cover 33 with a claw 34 provided at the upper end of the front case 9. The door switch mounting portion 21 is constructed as shown in FIGS. 5 and 6. In other words, the front case 9 has a through hole 3.
6. Holding piece 3 with protruding fulcrum 37 and claw portion 38
9. Opposing piece 4 located opposite the holding piece 39 here
0 and the pressing piece 41 are each integrally formed. Reference numerals 42 and 43 denote a door switch and its operation piece held in the space of the door switch mounting portion 21. When installing the door switch 42 on the front case 9, first place the operating piece 43 on the fulcrum 37 as shown in FIG.
Press 2 downward as shown by the arrow. At this time, claw 38
The pressing piece 41 is pressed by the door switch 42 and deforms outward, but returns to its original position when the pressing of the door switch 42 is completed. At this time, claw 38
Since the pressing piece 41 presses the upper surface of the door switch 42 and restricts movement in the lateral direction, the door switch 42 is securely held within the door switch mounting portion 21. A lower receiving surface 47 receives the lower surface of the door switch 42, and the lower receiving surface 47, the claw portion 38, the pressing piece 41, and the door switch 42 are held together. 44 is a rod that opens and closes the internal contacts of the door switch 42;
Reference numeral 45 indicates a through hole bored in the front frame 3 supporting the front case 9, and reference numeral 46 indicates an operator formed in the outer peripheral frame 14 of the door 12. and door 12
When the operation lever 46 is closed, the operation piece 4 passes through the through hole 45.
3 is pushed up, the door switch 42 is closed,
The drying equipment is ready for operation. Next, when the motor circuit and the heat generating circuit are closed, drying operation is performed. Referring again to FIG. 2, reference numeral 50 denotes a switch base on which mounting portions 51 and 52 are formed. A time switch 53 for controlling the operating time of the electric motor is attached to one attachment portion 51, and a changeover switch (not shown) for switching the amount of heat generated by the heat source assembly 22 is attached to the other attachment portion 52. This switch base 50 is fitted into the control box 20 of the front case 9 and fixed with screws or the like. 54 is a knob of the time switch 53. Referring again to FIG. 1, reference numeral 60 is a drum having a plurality of lifters 61 on its inner peripheral surface, the front end of which is rotatably supported around the bearing ring portion 19 of the front case 9, and the rear end of which is rotatably supported by the bearing ring portion 19 of the front case 9. It is rotatably supported around a fixed shaft 63 fixed to a support frame 62 fixed to the rear end of the main body frame 2. To explain in detail, a cylindrical portion 64 is provided on the front surface of the drum 60,
A bearing piece 65 made of synthetic resin is attached to the supporting boss 19-1 of the bearing ring part 19 at the outer circumference of the cylindrical part 64.
It is configured to be slidably supported.
Although not shown, a bearing piece is similarly attached to the supporting boss 32-1 of the heat-resistant plate 32, and the latter bearing piece is mainly used when the apparatus is used in an upright position. Furthermore, as is clear in FIG.
Make sure to hold 6. That is, with this configuration, compared to simply fixing the airtight felt 66 to the bearing ring portion 19 with adhesive or the like, the airtight felt 66 can be firmly fixed mechanically, thereby preventing peeling due to heat or humidity. It can be prevented. 6
7 is a fixing hole into which the fixing claw 68 of the bearing piece 65 is fitted and fixed. 69 is a sliding piece made of felt or the like stretched on the inner surface of the cylindrical part 64; 70 is a bearing piece 6;
5 and the drum 60, and is a sliding piece made of felt or the like attached to the bearing piece 65. To explain the rear part of the drum 60, the drum 6
A bearing 72 is fixed to the rear plate 71 of 0 by a holder 73. Reference numeral 74 designates a locking hole provided in the rear plate 71 near the outer periphery of this bearing 72, and reference numeral 75 designates a number of exhaust holes provided outward. The inner surface of the drum 60 of these exhaust holes 75 has a net 76
1 is removably attached to the mounting leg 77. 76-2 is the filter 76
This is an annular spring that snaps onto the mounting leg 77. The mounting leg 77 is made of an elastic synthetic resin material, and has a locking claw 79 formed at its tip. After inserting the locking pawl 79 into the locking hole 74 as shown in FIG. Since the movement of the cover 76 is restricted and the cover 76 is prevented from coming off, the cover 76 can be securely fixed even if the mounting legs 77 are made of synthetic resin. 81 is the support frame 6
The fixed shaft 63 is firmly supported by a collar body 83 in the front casing of the exhaust vane 82 which is manufactured integrally with the exhaust vane 2 . 84 is a vent provided in the front casing 81. A rear casing 85 covers the rear surface of the exhaust vane 82 and is connected to the front casing 81, and is provided with an exhaust port 86 opening rearward in a part of its outer periphery. Reference numeral 87 denotes a guide slope portion connected to the exhaust port 86 in order to improve exhaust performance.
Reference numeral 88 denotes an exhaust joint fixed to the exhaust port 86, and the outlet faces an exhaust louver 89 provided on the rear frame 4. The exhaust vane 82 is composed of a synthetic resin or a centrifugal vane made of a full layer, and bearings are provided at both ends of the boss portion of the exhaust vane 82, and the exhaust vane 82 is rotatably supported around the fixed shaft 63. Furthermore, the rear end of the boss portion is made to protrude rearward from the through hole 90 of the rear casing 85,
A belt groove 91 is formed in this protrusion. Furthermore, a belt 92 driven by an electric motor, which will be described later, is hung in this belt groove 91. Reference numeral 93 indicates the air exhaust port 75 of the rear plate 71 and the front casing 81.
A seal tube that maintains airtightness between the vent holes 84 is made of felt material and is attached to the rear plate 71. Details of this installation configuration are shown in Figure 9 and 1.
As shown in Figure 0. To explain these figures, 94 is a seal cylinder frame attached to the rear plate 71 and has an outer peripheral wall 95 and a cut-and-raised inner peripheral piece 96. The outer circumferential wall 95 has locking claws 97 cut and raised inward, and the inner circumferential piece 96 has locking claws 98 on both ends thereof bent slightly outward. Then, by inserting the end portion of the seal cylinder 93 between the outer circumferential wall 95 and the inner circumferential piece 96, and bending the inner circumferential piece 96 outward as shown in FIG. 9, the seal cylinder 93 is held between the two. At this time, the locking claws 97 and 98 are attached to the seal cylinder 9.
3, so even if a considerable external force acts on the seal cylinder 93, the connection between the seal cylinder 93 and the seal cylinder frame 94 will not fail. In addition, FIG. 10 is a state diagram before installation.

Reference numeral 100 is fixed to a mounting leg 101 extruded from the main body frame 2 by an electric motor. 102 is the capacitor, 103 is a motor shaft, and a pulley 104 is attached to one end of the shaft, and a pulley 105 is attached to the other end. A drum drive belt 106 is wound around the outer circumference of the drum 60 between pulleys 104. A support frame 107 is fixed to a motor board 108 and supports a tension pulley 109. Tension pulley 109 is tension spring 1
At 10, a predetermined tension is applied to the drum drive belt 106. 111 is the pulley 10
A motor cooling fan 112 is integrated with the motor cooling fan 5, and a fan belt 112 is wound between the belt groove 91 integrated with the pulley 105 and the exhaust vane 82. FIG. 11 shows the handle part of the door 12, and to explain this drawing, 13 and 1
Reference numeral 4 denotes the transparent plate described above and its outer peripheral frame. The outer peripheral frame 14 is made of synthetic resin, and has handle portions 113 and 114 projecting left and right on the front surface opposite to a door hinge (not shown). The hand grips are provided on the left and right sides in this way because the device is used in an upright or inverted position. In other words, if the handle parts are provided on the left and right sides, the door can be opened and closed with the dominant hand, regardless of which hand is used. 115 is a permanent magnet for fixing the door 12 to the main body case 1, and opposing ribs 116 and 117
It is attached with a pin 118 between them. 119 is a through hole provided in the permanent magnet 115, and the pin 11
8 is inserted, and a conical retaining ring 120 is fitted into the protrusion of the pin 118. Further, if the rib 121 is provided at this time, the pin 118 can be inserted with the permanent magnet 115 placed on the rib, thereby improving work efficiency. Reference numerals 122 and 123 are levs connected to the handles 113 and 114, forming a bag-like space for the handles. Furthermore, according to this shape, it is possible to divide the mold into upper and lower parts in the drawing, making molding very simple, and since the rear of the bag-like space on the side of the handle 114 is shielded by the transparent plate 13, it improves the appearance design.
There are no particular problems in terms of sealing performance.

FIG. 12 shows an improved shape of the hot air guide 15. The hot air guide 15 has a cylinder body, for example, an inner cylinder 124.
A cooling passage 12 is provided between the outer periphery of the entrance and exit port 11.
5 is formed. 126 and 127
are through holes that are bored in the front frame 3 and the front case 9, respectively, and communicate with the cooling passage 125. When the exhaust vane 82 is rotated, external air is sucked in through the holes 126 and 127.
It is sucked into the drum 60 through the cooling passage 125. At this time, since the clothing entrance/exit 11 is cooled by the air passing through the cooling passage 125, there is no danger of getting burned even if your hand touches the clothing entrance/exit 11. Hot air from the heat source assembly 22 is drawn into the drum 60 through the outer periphery of the inner cylinder 124.

Next, the operation will be explained. When the washed and dehydrated laundry is put into the drum 60 and the door 12 is closed, the door switch 4 is activated by the operator 46 of the door 12.
2 is closed. Under this condition, when the time switch 53 is set to a predetermined time, the electric motor 1
Current is supplied to the heating element 23 and the heating element 23. At this time, the amount of heat generated by the heating element 23 is changed over by a changeover switch depending on the amount of laundry. This switching is actually performed by changing the number of heating elements 23. When the electric motor 100 rotates, the pulley 10
4. The drum 60 is rotated at low speed by the belt 106. The rotational speed at this time is usually 50/min, which is such that the clothes are pulled up by the lifter 61 and dropped from above. Also, at the same time, pulley 10
5. The exhaust vane 82 is rotated at high speed by the fan belt 112. By rotating the exhaust vane 82, external air is sucked in through the intake port 6, is heated by the heating element 23, and then passes through the hot air guide 15 and reaches the inside of the drum 60. Clothes are repeatedly pulled up and dropped inside the drum 60, and the hot air removes moisture from the clothes, passes through the filter 76, the exhaust hole 75, and the vent 84, and reaches the inside of the fan casing. Further, the humid air discharged by the exhaust vane 82 is sent to the exhaust port 86, the exhaust joint 88, and the exhaust louver 8.
9 to the outside from the back of the drying device. When the time switch 53 is turned off, the electric motor 10
0, the power supply to the heating element 23 is cut off, and the drying operation is stopped. Next, the door 12 is opened and the clothes are taken out from the drum 60, and the series of operations is completed. At this time, since the door switch 42 is opened, the drum 60 will not rotate unexpectedly, making it safe. Furthermore, even if the door is opened due to a child's mischief, the drum 60 will stop, so it is safe.

As explained above, according to the present invention, since the cooling passage is provided around the clothing entrance/exit, it is possible to provide a highly safe clothes dryer since there is no chance of getting burned by touching the clothing entrance/exit with one's hand. It is.

[Brief explanation of the drawing]

Figures 1 to 11 show one embodiment of the present invention. Figure 1 is a vertical cross-sectional view of the entire device in an inverted state, and Figure 2 is an exploded perspective view of the front case section viewed from the back side. , Fig. 3 is an exploded perspective view when seen from the front, Fig. 4 is a vertical sectional view of the heat source assembly, Fig. 5 is a perspective view of the door switch mounting part, and Fig. 6 is a cross section with the door switch installed. Figure 7 is a vertical cross-sectional view of the airtight felt attachment part, Figure 8
The figure is a longitudinal sectional view of the filter attachment part, Figure 9 is a longitudinal sectional view of the seal tube attachment part, Figure 10 is a perspective view of the same, Figure 11 is a sectional view of the handle part, and Figure 12 shows another embodiment. FIG. 2 is a longitudinal cross-sectional view of a cooling passage section. 1...Main case, 9...Front case, 1
0...Annular packing, 11...Entrance/exit, 12...
...Door, 15...Hot air guide, 16...Heat source mounting window, 19...Bearing ring, 20...Control box, 21...Door switch mounting portion, 22...Heat source assembly, 125...Cooling passage.

Claims (1)

[Scope of Claims] 1. A main body case, a cylindrical clothing entrance provided in front of the main case and equipped with a door that can be freely opened and closed, and a cylindrical clothing entrance provided in the main case and rotated by an electric motor. a drum, an impeller that passes around the cylindrical clothing entrance and exit port to suck in outside air and exhaust the air inside the drum to the outside, and a heat source that heats the air that is sucked into the drum. A cylindrical body forming a cooling passage is provided between the outer periphery of the cylindrical clothing opening and the outer periphery of the cylindrical clothing opening, and external air is directly sent into the drum through the cooling passage. A clothes dryer characterized by comprising: