JPS6334638Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a dryer with improved safety.

[Technical background of the invention]

Conventionally, dryers have generally been configured to open and close the dried material inlet/outlet of the outer box with a door, and hot air is drawn into the drum through an inlet and an outlet (ventilation channel) formed near the dried material inlet/outlet. It allows warm air to flow in and out.

[Problems with background technology]

However, in general, in a dryer, as the drying progresses, the moisture contained in the dried material decreases, so the temperature of the hot air flowing out from the drum increases. Therefore, the temperature of the hot air discharge path rises, and the temperature of the dry matter inlet and outlet also rises due to heat transfer. During this drying process, if you open the door and put your hand in to take out the drying material, if you touch the area near the drying material entrance, you may feel the heat and reflexively withdraw your hand. - There is a risk of injury from hitting your arm or other parts of the body.

[Purpose of the invention] This invention was made in view of the above points.
The purpose is to provide a safe dryer that prevents hands from touching the vicinity of the drying material inlet/outlet when the temperature is high, thereby preventing the occurrence of injury.

[Summary of the idea]

The present invention provides a structure in which a thermally responsive member that deforms when the temperature exceeds a predetermined temperature is provided near the drying material entrance, and the door of the drying material entrance cannot be opened based on the deformation of the thermally responsive member. The feature is that the door is locked when the temperature near the drying material entrance is high.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 to 3, reference numeral 1 denotes an outer box having a rectangular opening 2 formed approximately in the center of its front plate 1a. 3 is a drum placed inside the outer box 1;
This drum 3 has a large diameter circular opening 4 formed on the front surface, and a pivot 5 protruding from the approximate center of the back plate 3a.
is pivotally supported on a support frame 1b fixed to the back of the outer box 1. Reference numeral 6 denotes a substantially annular air guiding body, which has a rectangular inner wall portion 6a and an annular outer wall portion 6 whose diameter is slightly smaller than the inner diameter of the circular opening 4 of the drum 3 on both the inner and outer peripheral edges.
b is bent, and the outer box 1 is assembled with the annular outer wall portion 6b fitted into the circular opening 4 of the drum 3.
It is fixed to the inside of the front plate 1a. and,
A gasket 7 is interposed between the circular opening 4 of the drum 3 and the annular outer wall 6b of the air guiding body 6 to provide a seal, and the drum is closed by bearings (not shown) provided intermittently on the annular outer wall 6b. 3 circular openings 4 are supported. In the installed state of the air guide body 6, the air guide body 6 is located inside the large-diameter circular opening 4 and faces into the drum 3 from its front side, and is located inside the central rectangular inner wall portion 6a. The opening is located within the rectangular opening 2 on the front surface of the outer box 1, and an inlet 8 and an outlet 9 are formed on the left and right sides of the rectangular inner wall 6a of the air guiding body 6, respectively, to communicate with the inside of the drum 3. are doing. 10 is the front plate 1a of the outer box 1
This is an entrance/exit cover attached to the front plate 1a, which covers the inside of the rectangular opening 2 of the front plate 1a and the rectangular inner wall 6a of the air guiding body 6 from the inside to form a drying material entrance/exit 11, and this drying material entrance/exit 11 is connected to the door. 12 so that it can be opened and closed. An inflow channel cover part 13 is integrally formed on the left side of the entrance/exit cover 10, and this inflow channel cover part 13 airtightly covers the rectangular opening 2 and the left open part of the air guiding body 6. A wind inflow path 15 is formed. On the other hand, an opening 16 formed on the right side of the front plate 1a of the outer box 1 is formed on the right side of the entrance cover 10.
A discharge passage cover portion 17 is integrally formed to cover the opening 16, and a hot air discharge passage 19 is formed between the discharge passage cover portion 17 and an exhaust duct 18 disposed inside the opening portion 16. A part of the exhaust duct 18 is extended into the air guide body 6 to form an outlet 9.
A through hole 20 is formed correspondingly to communicate the discharge passage 19 with the inside of the drum 3. 21 is a hot air fan device provided on the upper part of the outer box 1 and includes a casing 22 and a hot air fan 23; 24 is a casing 2 provided in parallel at the front of the hot air fan device 21;
5 and a cold air fan 26, both the fans 23 and 26 are connected to a fan shaft 27.
is attached to. The suction side of the hot air fan device 21 is communicated with the exhaust duct 18 . 28
is a heat exchanger, which is provided with a first passage and a second passage which are orthogonal to each other (not shown), and is configured to exchange heat between the two passages, and this first passage is connected to its inlet. The side is connected to an air discharge duct 29 connected to the discharge side of the hot air fan device 21, and the outlet side is connected to the inside of the drum 3 via the ventilation duct 30 and the inflow path 15 in this order. The inlet side of the second passage of the heat exchanger 28 is connected to the discharge side of the cold air fan device 24, and the outlet side is connected to the outside of the outer box 1 through an exhaust port 31 formed in the back plate portion 1c of the outer box 1. It's communicating. Reference numeral 32 denotes an air intake port formed on the front plate 1a of the outer box 1 and equipped with a filter 32a, which allows outside air to flow into the cold air fan device 24. Reference numeral 33 denotes a motor disposed within the outer box 1, and a belt 35 is stretched between the first drive pulley 34 attached to the rotating shaft 33a and the outer periphery of the drum 3. A pulley 36 is attached to a portion of the fan shaft 27 that protrudes outside the casing 22, and the pulley 36 and the motor 33
A second drive pulley 37 attached to the rotating shaft 33a of
A belt 38 is stretched between the two.

Now, 39 is a thermally responsive member made of, for example, a bimetal, which is fixed to the side wall 17a of the discharge passage cover portion 17 of the entrance/exit cover 10 in the vicinity of the dried material entrance/exit 11 so as to protrude into the discharge passage 19. The end face 39a protrudes outward in an arc shape at normal temperature, and when the temperature exceeds a predetermined temperature, it is reversed and the end face 39a protrudes outward in an arc shape.
a deforms in such a way that it sinks inward (see Figure 4).
40 is an insertion hole formed in the side wall 17a of the discharge passage cover 17, 41 is a locking pin provided through the insertion hole 40, and one end of this is constantly compressed by a spring 42 to connect to the end surface portion 39a of the thermally responsive member 39. It is provided so as to come into contact with. 43 is the side wall 1 of the door 12
This is an engagement hole provided in 2a and corresponding to the locking pin 41. In addition, 44 shown in FIG. 1 is a timer, which energizes the motor 33 and heater 14 during the timekeeping operation, turns off the heater 14 several minutes before the end of the timekeeping operation, and turns off the power to the motor 33 when the timekeeping operation ends. It is something to do.

Next, the operation of the above configuration will be explained. After putting the dry matter into the drum 3 from the dry matter entrance 11, the door 1
2 is closed and the timer 44 is set, the motor 33 and the heater 14 are energized, and the rotation of the motor 33 rotates the drum 3 and pulley 36, as well as the fan shaft 27, via the belts 35 and 38, and the fan shaft 27 is rotated. and both fan devices 21 and 24 for cold air.
Both fans 23 and 26 are rotated. As a result, hot air heated by the heater 14 is supplied into the drum 3 to dry the dry matter inside, and then passed through the exhaust duct 18 to the hot air fan device 2.
After passing through the first passage of the heat exchanger 28, it is heated by the heater 14 and supplied into the drum 3 again. In addition, outside air is sucked in from the intake port 32 by the cold air fan device 24, flows through the second passage of the heat exchanger 28, and is passed through the exhaust port 32.
In this process, the hot air flowing through the first passage is cooled, moisture in the hot air is removed, and moisture contained in the dried material is reduced. Accordingly, the amount of heat consumed to evaporate water within the drum 3 also decreases, so the temperature within the drum 3 and the temperature of the hot air discharged from the drum 3 increases. Accordingly, the temperature of the thermally responsive member 39 attached to the side wall 17a of the discharge passage cover portion 17 increases gradually as the degree of dryness of the dried material increases, and finally exceeds a predetermined temperature, so that the end surface 39a of the thermally responsive member 39 is as shown in FIG. The inner surface presses one end of the locking pin 41, and the other end of the locking pin 41 is ejected from the side wall 17a toward the door 12 against the elastic force of the compression spring 42. It is engaged with the engagement hole 43 of the door 12, thereby engaging with the engagement hole 43, thereby locking the door 12 in the closed state.
Then, several minutes before the completion of drying, the heater 14 is cut off, so that cold air circulates inside the drum 3. As a result, the dried material is cooled and the drying operation is completed.
The thermally responsive member 39 is also cooled down to a low temperature by the passage of this cold air, so its end surface 39a protrudes outward again, and the engagement pin 41 is moved once again to the thermally responsive member 39 by the elastic force of the compression spring 42. The engagement pin 41 and the engagement hole 43 are disengaged, and the door 12 returns to its openable state.

According to the above embodiment, as the drying of the dried material progresses, the temperature of the hot air increases, and therefore the drying material inlet/outlet 1
When the peripheral wall near 1 becomes high temperature, the thermally responsive member 3
9 is deformed to form the locking pin 41 and the engagement hole 4 of the door 12.
3 and locks the door 12 in the closed state, the door 12 cannot be opened when the surrounding wall near the drying material entrance 11 is hot, and as a result, the door 12 is opened and the drying material entrance 11 is locked. Safety can be ensured by preventing hands and arms from inadvertently touching the nearby high-temperature peripheral wall.

Note that the present invention is not limited to the above-mentioned embodiments. For example, a shape memory alloy may be used as the thermally responsive member, and the door 12 may be locked by deforming the shape memory alloy at a predetermined temperature or higher. Good etc.
Various modifications are possible without departing from the gist.

[Effect of idea]

As is clear from the above explanation, the present invention locks the door by providing a heat-responsive member that deforms when the temperature exceeds a predetermined temperature near the drying material entrance. To provide a safe dryer that can prevent people from opening the door and touching it with their hands.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view, FIG. 2 is a cross-sectional view taken along the line - in FIG. 1, FIG. 3 is a cross-sectional view taken along the line - in FIG. 1, and FIG. 3 is a view corresponding to FIG. 3 showing a deformed state of the thermally responsive member. In the figure, 1 is an outer box, 11 is a drying material entrance, 12 is a door, and 39 is a thermally responsive member.

Claims (1)

[Scope of utility model registration request] A heat-responsive member that deforms when the temperature exceeds a predetermined temperature is provided near the dry goods entrance and exit formed in the outer box,
A dryer characterized in that the door of the dried material entrance/exit is locked based on the deformation of the thermally responsive member.