JP2004097831A - Drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drier which has raised drying efficiency and enables dried washing to be easily taken out. <P>SOLUTION: In this drier, air heated by a heater 9 is sucked into a space 8c and flows into an inner shell 1 through gates 4j, 4k as shown by arrow marks D, E. Dried washing in the inner shell 1 is quickly dried to improve heat efficiently because hot air blows from both sides of washing. Exhaust blown from the inner shell 1 into an outer shell 3 advances in an order of an outlet 3b → suction port 12a → fan 12 → exhaust port 12b → arrow mark L and finally is discharged out through an exhaust port 15. A damper 24 is switched to flow back all the volume of air blown from the fan 12 into the gate 4j through a reflux duct 23 to enable dried washing to be easily taken out through a taking-out port 4b by an air flow blown into the inner shell 1 from the gate 4j. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a dryer for towels, clothes, and the like.

Conventionally, the horizontal cylindrical inner body made of a perforated plate is supported to rotate and driven, and the inner body is covered with the outer body with a gap from the inner body except for the air inlet and the air outlet. BACKGROUND ART Dryers provided with an air outlet, provided with a heater in an air passage communicating the air inlet with the atmosphere, and provided with a dehumidifying fan in an air passage communicating the air outlet with the atmosphere are frequently used. In addition, hot air is blown into the inner body using the inlet side of the inner body to be dried as an air inlet, and exhaust gas that has escaped from the inner body to the outer body side is exhausted to the outside by the moisture exhaust fan through the air passage from the air outlet of the outer body. (See Patent Documents 1 to 3).

JP-A-8-240385 (0025-0029, FIG. 1) JP-A-8-240386 (OO36, 0037, FIG. 1) JP-A-9-206500 (0017, FIG. 1)

When the inner body is caused to generate an air flow from the input side of the clothes to the take-out side, the clothes etc. are pushed to the take-out side, and air escaping from the perforated plate of the inner body to the outer body with hot air which is not kept in drying. Many are not efficient. Heated air is supplied from the air inlet of the outer shell, and is supplied and exhausted through the perforated plate over the inside and outside of the inner shell.Then, exhausting from the air outlet of the outer shell has a large air resistance and is effective for drying. The heated air is exhausted without being used.

An object of the present invention is to provide a dryer in which an object to be dried such as clothing is located at an intermediate portion of the inner trunk in the front-rear direction and can be efficiently dried.

The first invention according to the present application is directed to a horizontal cylindrical body made of a perforated plate which is supported by a frame so as to be driven to rotate, and has an inner body having openings at both ends. A frame having an outer body, both ends of which are sealed between the inner body, a heater provided at an air inlet of the frame for heating external air to be taken in, and a heated air passing through the heater and passing the heated air to the inner body. An inlet-side air passage leading to both end openings, an outlet-side air passage guiding air flowing from the outer body to the outside through the perforated plate of the inner body, and the inlet-side air passage, the inner body, the outer body, and the outlet-side air passage And a fan for generating an air flow in the order of: and drying the object to be dried by blowing heated air from both ends of the inner body into the inner body.

The second invention according to the present application is characterized in that the frame has an opening for opening an object to be dried having an opening / closing member that can be opened / closed corresponding to one opening of the inner body, and can be opened / closed corresponding to the other opening of the inner body. An outlet for the object to be dried having an openable and closable member, and a return passage branching from the outlet air passage downstream of the fan with respect to the flow of air flowing through the outlet air passage and reaching the inlet opening of the inner body, An air passage switching means for selecting whether to discharge the air on the discharge side of the fan of the outlet side air passage through the outlet side air passage or to return the air to the input side opening of the inner body through the return passage; The dryer according to the first aspect of the present invention, wherein air is fed into the inlet opening of the inner body through the return passage at the time of removal.

A third invention according to the present application is characterized in that the frame has a charging / discharging outlet for charging / discharging an object to be dried having an opening / closing member that can be opened / closed corresponding to one opening of the inner body. The dryer according to the invention of the above (1).

A fourth invention according to the present application is directed to a cool air intake port provided in a frame for taking in outside air, which communicates with an air passage leading to one opening of an inner body in an inlet side air passage, and one opening of the inner body. Air passage switching means for closing one of the air passage and the cold air intake roller and opening the other, and cools the object to be dried by opening the outside air intake roller in the cooling step of the object to be dried. A dryer according to any one of the first to third inventions.

The fifth invention according to the present application is a heater in which the heater is a heat exchanger using steam as a heat medium, a drain heater as a heat exchanger is provided on the outside air side of the steam heater, and a drain trap is provided in the heater. The dryer according to any one of the first to third inventions, wherein the drain discharged from the steam heater flows into the primary side of the drain heater, and outside air passes through the drain heater and the steam heater in this order.

(1) According to the present invention, since the inlet-side air passage through which the hot air for drying passes is not narrowed and reaches the inside of the inner body, the loss of the supplied hot air is small.
(2) Since the hot air blown from both ends of the inner body is applied to both sides of the object to be dried, the drying is performed efficiently and the drying time is shortened. And further energy savings.
(3) In the case where the inlet for the material to be dried is provided corresponding to one opening of the inner body and the outlet is provided corresponding to the other opening of the inner body, the inner body is connected to the air passage on the discharge side of the fan. If a recirculation passage reaching the input side opening of the fan is provided and a selective air passage opening / closing member is provided at a branch portion of the air passage on the discharge side of the fan and the recirculation passage, air is blown into the inner body only from the inlet side of the inner body. The object to be dried can be easily taken out by applying an air flow to the object to be dried.
(4) The structure of the dryer is simplified according to the configuration in which the discharge outlet is only the front side.
(5) In the above-described configuration, providing a pre-drain overnight saves energy.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1 to 8 show the first embodiment. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a front cross-sectional view, FIG. 4 is a side cross-sectional view, FIG. 5 is a cross-sectional view taken along line AA of FIG. 1, and FIG. is there.

The inner trunk 1 has a horizontal cylindrical inner trunk main body 1a made of a perforated plate, for example, a stainless steel plate, and is provided with inner trunk bars 1b equally spaced in the circumferential direction in the inner peripheral side axial direction. An annular raceway ring 1c having an L-shaped cross section including the center of rotation and being concentric with the inner trunk body 1a is provided on the outer periphery of both ends of the inner trunk 1.

の 下 The lower semicircle side of the bearing ring 1c is supported by four rubber rollers 2. The rubber roller 2 is rotatably supported on the body frame 4 via a bearing. A pair of auxiliary rollers 17 rotatably supported by the frame 4 are in contact with both side surfaces of the brim of the front raceway 1c of the inner body 1 (the auxiliary roller 17 on one side of the brim appears in FIG. 1). An auxiliary roller is also provided at the same position on the other side of the collar), and the collar of the front raceway 1c is sandwiched by the auxiliary roller 17 to stop the axial movement of the inner body 1 (see FIG. 1). At least one coaxial pair of the rubber rollers 2 is connected to a motor 19 of a driving device via a power transmission member such as a chain transmission device 21. The motor 19 is fixed to the main body frame 4. The auxiliary roller 17 is supported by the frame 4 via a bearing (not shown).

Here, the speed of the motor 19 is controlled by, for example, inverter control. In addition, forward / reverse rotation is possible, forward / reverse rotation time can be changed by setting, control for arbitrarily setting forward / reverse rotation time, and rotation angle of forward / reverse rotation as rotation angle of inner body 1 are set. A control device (not shown) controls the inner body 1 to perform a swing motion within 360 degrees.

外 The outer shell 3 is provided with a gap from the outer circumference of the inner shell 1. Both ends of the outer shell 3 are sealed with the inner shell 1. The outer trunk 3 is connected so as to be integral with a main body frame (hereinafter, referred to as a frame) 4. The outer trunk 3 constitutes an outer trunk outlet 3b which is open at a lower portion of the cylindrical outer trunk portion 3a along the inner trunk 1 in the radial direction and serves as an air outlet. A front door device 5 is provided on the front end side of the outer trunk portion 3a as shown in FIGS. 1 and 4, and a rear door device 6 is provided on the rear end side of the outer trunk portion 3a as shown in FIGS. Is provided. The front door device 5 is an opening / closing member that opens and closes an input port 4a for inputting an object to be dried such as clothing. The input port 4a and the opening on the input side at one end of the inner trunk 1 are in corresponding positions. The rear door device 6 is an opening / closing member that opens and closes an outlet 4b for taking out the object to be dried. The take-out port 4b and the take-out opening at the other end of the inner body 1 are in corresponding positions. The inlet 4a and the outlet 4b are provided with the frame 4 opened.

投入 Both the loading and unloading sides of the inner cylinder 1 to be dried are circular. In the outer shape of the inner body 1 having a cross section perpendicular to the axis, a rectangular input port 4a is provided in the axial direction away from the end of the inner body. The slot 4a is provided in the front plate 4c in a direction in which the plate surface in front of the frame 4 is perpendicular. The space between the front side plate 4c and the outer trunk 3a is closed by a peripheral wall. Therefore, the charging roller 4a passes between the outside and the inner body 1. A chute 4t descending from the lower edge of the insertion port 4a toward the inner body 1 is provided.

前 A front door device 5 is provided just outside the input port 4a as an opening / closing member for opening and closing the input port 4a. The front door device 5 is an up / down sliding door.

(1) As shown in FIG. 1, the front door 5a engages with vertical guide rails 5b provided on both edges of the loading slot 4a, and is guided so as to be able to move up and down. The upper end of a hydraulic cylinder 5c having a piston rod fixed to both sides of the front door 5a is attached to the frame 4. The front door 5a closed in FIG. 1 is guided by the guide rail 5b by the extension of the piston rod of the cylinder 5c, moves downward, and opens the loading slot 4a.

後 As shown in FIG. 2, the rear door device 6 has the upper end of the rear door 6a rotatably supported on the frame 4 by a horizontal pivot 6b. That is, the rear door 6a is an outward opening door. The clevis-type cylinder 6d connects the tip of the arm 6c whose root is fixed to the rear door 6a and the upper part of the frame 4. The rear door 6a is opened and closed by the advance and retreat of the piston rod of the clevis type cylinder 6d.

(4) The square tubular portion 4d inside the loading slot 4a shown in FIG. 4 is connected to the outer tubular portion 3a and the front side plate 4c of the frame 4. The cylindrical portion 4e on the side of the outlet 4b and the upper chord plate 4g are connected to the frame 4 at the lower end of the rear end plate 4p.

The upper plate 4f of the square tube portion 4d is substantially horizontal, but the lower plate is the swash plate chute 4t as described above. The outlet 4b is formed by connecting a part of a partially cylindrical portion 4e of a circle concentric with the outer trunk portion 3a and a horizontal chord plate 4g above the portion. Between the upper and lower ends of the upper portion of the outer trunk portion 3a and the upper plate 4f and the chord plate 4g, there are provided vertical gate plates 4h and 4i. The gate plates 4h and 4i are perpendicular to the rotation center line of the inner body 1. Gates 4j and 4k are provided in the gate plates 4h and 4i with openings. The gates 4j and 4k are arc-shaped (almost crescent-shaped).

(3) As shown in FIG. 3, a rectangular air inlet 8a shown in FIG. A heater 9 is provided at the air inlet 8a. The heater 9 is a heat exchanger or the like in which the heat medium is steam. The heater 9 is a means for heating the outside air flowing in from the air inlet 8a to reduce the humidity of the heated outside air into hot air of an airflow dried by the suction force of a fan described later.

上部 The upper part of the frame 4 constitutes the air passage 8 on the inlet side. The air passage 8 includes an upper plate 4f, a lower plate 4u inclined obliquely from the lower end of the rear end plate 4p to the inside, front and rear end plates 4n, 4p, a top plate 4m, a side plate 4q, 4r and a cylinder. The outer body 3a is surrounded by a portion above the upper plate 4f and the lower plate 4u. As shown in FIG. 5, the air passage 8 has an air inlet 8a → a heater 9 → a heated air outlet 8b → a branch space 8c → branch passages 8d, 8e → gates 4j, 4k → the inner body 1.

(4) The side plate 4q is provided with a wind-off projection 4r protruding toward the air inlet 8a so as to smoothly flow the air flow from the branch space 8c to the branch passages 8d and 8e and suppress turbulence. The wind-off projection 4r is provided from the outer trunk portion 3a to the top plate 4m. The presence of the wind-off projections 4r has the effect of equalizing the distribution of the airflow flowing into both sides of the inner body 1 and making the air volume and the wind speed uniform.

As shown in FIG. 3, an exhaust duct 11 is continuously provided at an outer trunk outlet 3b which is an air outlet provided following the outer trunk 3, and an outlet of the exhaust duct 11 is a moisture exhaust fan (hereinafter, referred to as a fan). Twelve suction ports 12a. In the exhaust duct 11, a dust filter 13 for removing cotton dust is provided across the air passage. The dust removing filter 13 is of a draw-out type and can be pulled out toward the near side of the drawing in FIG. 3 to remove cotton dust. Alternatively, an endless mesh belt is wound around two rollers instead of the dust filter 13, and the mesh belt is arranged across the duct 11, and further arranged inside and outside the duct 11 through a slit of the duct 11. The dust on the mesh belt may be collected by a dust collecting device outside the belt 11 (not shown).

As shown in FIGS. 1, 2 and 8, the discharge port 12b of the fan 12 is connected to the inlet 14a of the exhaust duct 14. The outlet of the exhaust duct 14 ends at an exhaust port 15 located at the top of the frame 4.

The inner body 1a is a perforated plate, and the porosity of the inner body 1a acts to dehumidify the material to be dried, so that the air whose humidity has increased and the temperature has fallen out of the inner body 1 to the outer body 3 and It comes out to the space between the inner trunks 1.

As shown in FIG. 8, the outlet side air passage 16 for the exhaust is formed by the outer body outlet 3b → the dust filter 13 → the duct 11 → the suction port 12a of the moisture discharge fan 12 → the fan 12 → the discharge port 12b → the exhaust duct 14 → the discharge port. It is 15.
As shown in FIGS. 5 and 8, the flow of air flowing through the outlet-side air passage 16 is branched from the outlet-side air passage 16 downstream of the fan 12 to reach the recirculation passage 22 reaching the inlet-side opening of the inner body 1. It is provided. A member constituting the return passage 22 is a return duct 23.

開口 As shown in FIG. 6, an opening 14b is provided in the upper part of the exhaust duct 14 on the front side. The other end of the reflux duct 23 having a rectangular cross section having a reflux passage inlet 23a at one end corresponding to the opening 14b covers a reflux inlet 4s provided in the end plate 4n of the frame 4. The inlet 4s and the outlet 23b of the reflux duct 23 coincide with each other. It is desirable that the reflux inlet 4s and the gate 4j are located at positions facing each other. In other words, the return inlet is designed such that the flow from the return inlet 4s toward the gate 4j is smooth, the amount of air blown from the gate 4j into the inner body 1 and the loss of wind pressure are small, and the direction of the wind from the gate 4j to the inner body 1 is appropriate. 4s, the position and shape of the gate 4j are selected. At this time, the position of the return inlet 4s is selected such that the wind direction from the gate 4j to the inside of the inner body 1 is directed obliquely downward, and a guide for regulating the air flow is provided if necessary.

Between the outlet-side air passage 16 and the return passage 22, the air on the discharge side of the fan 12 of the outlet-side air passage 16 is exhausted through the outlet-side air passage 16 or through the return passage 22 to the input side opening of the inner body 1. There is provided an air passage switching means for selecting any one of the reflux and the air is sent to the inlet opening of the inner body 1 through the reflux passage at the time of taking out the material to be dried.

(6) As shown in FIG. 6, the air passage switching means is provided with a damper 24 which is at the edge of the opening 14b and is in contact with the inside of the exhaust duct 14. The damper 24 is rotatable about a fulcrum 24a so that one of the openings 14b or the exhaust valve port 14c is closed and the other is opened. Although the members forming the fulcrum 24a are not shown, an axis passing through the fulcrum 24a and orthogonal to the plane of the drawing is driven by an actuator provided outside the duct 14. The actuator is, for example, a hydraulically driven rotary actuator directly connected to the shaft, or a hydraulic cylinder connected to the shaft via a link mechanism.

作用 The operation of the above configuration will be described. The operation is performed in the order of a material to be dried step, a drying step, a cooling step, and a removal step. In the operating state, the heater 9 is always energized.

(Drying material input process)
With the rear door 6a closed, the piston rod of the cylinder 5c is extended to open the front door 5a, and the laundry or clothes to be dried such as clothes and clothes are thrown into the inner body 1 through the slot 4a. The front door 5a is closed by retracting the piston rod of the cylinder 5c.

(Drying process)
Before starting, the damper 24 closes the opening 14b. A sensor (not shown) detects that there is an object to be dried in the inner body 1, and a signal indicating that the front door 5a is closed is input to the control device or a start switch (not shown) is turned on. Then, the motor 19 and the fan 12 are driven, and the drying process starts. The motor 19 drives the roller 2 via the chain transmission 21.

The inner body 1 is rotated by the rollers 2 while being supported by the rollers 2. As a result, the material to be dried held on the inner peripheral surface of the inner shell 1 that moves upward due to the function of the inner shell 1b is lifted, and the inner shell is biased obliquely upward at the upper part of the inner shell 1. , Fall, and lift again. Here, the movement of the inner trunk 1 is controlled by controlling the motor 19. That is, the inner body 1 is rotated forward or backward. In addition, the normal rotation and the reverse rotation are alternately repeated. The time for normal rotation and reverse rotation can be set arbitrarily. Further, the rotation speed of the inner body 1 is changed. By taking the form of the movement of the inner body 1 such that the normal rotation and the reverse rotation are alternately repeated, it corresponds to the type and the amount of the dried object. At the same time, air flows through the inlet-side air passage 8, the inner shell 1, the outer shell 3, and the outlet-side air passage 16 by driving the fan 12. Since the pressure from the air inlet 8a to the fan 12 is negative due to the suction flow of the fan 12, the hot air does not leak out of the machine.

Next, the air flow will be described in detail. In FIG. 3, outside air is drawn in from the air inlet 8a as shown by the arrow A. Next, as shown by the arrow B, when the air sucked from the air inlet 8a passes through the heater 9, this air is heated and dried and exits to the heated air outlet 8b. The heated air that has flowed out to the heated air outlet 8b travels along the upper outer side of the outer shell 3 as shown by arrow C, and is divided into the front and rear sides of the dryer as shown by arrows 2 and e shown in FIG. go. At this time, the air flow is made equal by arrows d and e by the wind-off projection 4r. In the vicinity of the front and rear ends of the outer trunk 3, the branch passages 8d and 8e between the end plates 4n and 4p of the frame 4 and the gate plates 4h and 4i respectively pass through the gates 4j and 4k to arrows (see FIG. 4). As shown in ()), the gas flows obliquely downward into the inner body 1 mainly in the axial direction.

Since the inflow passage of the heated air to the inner body 1 is from the input side and the take-out side of the material to be dried at both ends of the inner body 1, when the air passes through the perforation as in the conventional example through the perforated plate from the outer body side. As a result, there is no loss from passing from the outside of the inner body to the inside of the inner body due to a reduction in the passage area due to the restriction resistance of the squeezing, the pores being partially blocked by the material to be dried. Further, since heated air is blown from both sides of the object to be dried against the gates 4j and 4k, the area to which the object to be dried is aerated is large. The object to be dried is brought to the center of the inner body 1 in the front-rear direction, so that the heated air does not act on only one side of the object to be dried. Then, hot air is blown mainly in the axial direction only from the input side and the take-out side at both ends of the inner body 1, and the material to be dried is lifted and dropped in the inner body 1 by the inner body 1b. Since the dried material is exposed to hot air, the material to be dried dries efficiently.

Therefore, the object to be dried is not pressed against the rear door and the heated air cannot be effectively applied to the object to be dried, unlike a conventional dryer in which heated air is fed only from the inlet side.

The air whose humidity has risen due to deprivation of moisture from the material to be dried in the inner body 1 has a cylindrical shape between the inner body 1 and the outer body 3 as shown by an arrow in FIG. Out into the space. Exhaust that has flowed downward in the circumferential direction indicated by an arrow in FIG. 3 in this cylindrical space is collected at the outer trunk outlet 3b. Exhaust gas that has progressed from the outer trunk outlet 3b as shown by the arrow nu is removed from the cotton dust when passing through the dust filter 13, and then travels as shown by the arrow, and is sucked into the suction port 12a of the fan 12 to be discharged to the discharge port 12b. Then, as shown in FIG.

(Cooling process)
When the drying of the object to be dried is completed, a cooling step of the object to be dried starts. The cooling step is performed without deenergizing the heater 9 in the state of the drying step. Here, the forward or reverse rotation, forward / reverse rotation, rotation speed, forward / reverse rotation time of the inner body 1 can be set in the same manner as in the drying step. At this time, the front door 5a is opened halfway. Note that, here, the half-open refers to a partial opening. As a result, no air flow is sucked from the air inlet 8a. The outside air is sucked into the inner body 1 from the inlet 4a, enters the inner body 1, and cools the object to be dried by blowing cool air to the object. The air whose temperature has risen as a result of acting on the material to be dried passes between the inner body 1 and the outer body 3 through the perforations of the inner body 1 and then passes through the outer body outlet 3b through the outlet side air passage 16 to the outside of the machine by the fan 12. Is discharged.

(Removal process)
When the cooling process is completed, the process is performed while rotating the inner body 1. Here, the movement of the inner trunk 1 is controlled by controlling the motor 19. That is, the inner body 1 is rotated forward or backward. In addition, the normal rotation and the reverse rotation are alternately repeated. The time for normal rotation and reverse rotation can be set arbitrarily. Further, the rotation speed of the inner body 1 is changed. Corresponds to the type and quantity of the object to be dried by taking the form of the movement of the inner body 1 such as performing a swing such that the rotation angle of the inner body 1 is not more than 360 degrees at the time of forward / reverse rotation. I do. Further, the fan 12 remains rotating.

(6) First, the damper 24 having closed the opening 14b is urged by an actuator (not shown) to rotate counterclockwise around the fulcrum 24a in FIG. 6 to close the exhaust valve port 14c. Then, when the piston rod of the clevis type cylinder 6d is retracted, the rear door 6a is pivotally opened from the solid line position to the position indicated by the two-dot chain line in FIG. The front door 5a is closed by retracting the piston rod of the cylinder 5c.

で は In the first stage of taking out, the front door 5a is kept closed, and after half of the object to be dried is taken out, as the second stage, the front door 5a is fully opened to take out the remaining object to be dried.

作用 The operation in the first stage is as follows. The suction flow to the fan 12 is the same as that in the drying step through the inlet-side air passage 8 that passes through the air inlet 8a to the inner body 1 and the outlet-side air passage 16 that extends from the inner body 1 to the suction port 12a of the fan 12. The flow and the outside air flow into the inner body 1 through the outlet 4b, exit from the inner body 1 between the inner body 1 and the outer body 3a, and flow between the inner body 1 and the outer body 3a to the outer body outlet 3b. The flow passes through the outlet side air flow path 16 and reaches the suction port 12a of the fan 12. However, since the discharge air from the fan 12 described later flows into the gate 4j side, the suction flow from the gate 4j can be ignored. Among these flows, the speed of the air flowing into the inner body 1 from the air inlet 8a for taking in the outside air and the outlet 4b becomes extremely slow. The discharge amount of the fan 12 increases as the suction resistance decreases.

{The discharge air whose pressure has been increased by the fan 12 is accelerated in the duct 14 as shown by an arrow in FIG. 1 and flows from an open opening 14b as shown in FIG. The air flowing in the return passage 22 in the return duct 23 in the direction of the arrow force shown in FIG. 5 flows from the return passage outlet 23b and the return inlet 4s to the gate 4j facing the return inlet 4s as shown by the arrow Y. And is blown into the inner body 1 from the gate 4j as shown by the arrow. The object to be dried is urged toward the outlet 4b by the blown air flow from the gate 4j into the inner body, and is taken out from the outlet 4b. At this time, since the front door 5a is closed, the velocity energy of the air to be blown is converted into pressure between the front door 5a and the material to be dried clogged in the inner body 1, and the material to be dried is pushed out toward the outlet 4b. Strength increases.

後 After about half of the material to be dried is taken out of the inner body 1, the cylinder 5c is extended and the front door 5a is pushed downward. The front door 5a is guided by the guide rail 5b and moves downward, and the slot 4a is fully opened. As a result, the suction passage of the fan 12 is changed to the charging cylinder 4a → the inner shell 1 → between the inner shell 1 and the outer shell 3a → the outer shell outlet 3b → the duct 11 → the fan 12 to further reduce the air resistance of the suction passage of the fan 12. Then, the intake air volume and the discharge air volume of the fan 12 further increase, and the amount of air blown into the inner body 1 from the gate 4j greatly increases, and the wind speed increases. As a result, the remaining material to be dried is discharged from the outlet 4b.

As described above, in the removal process of the embodiment, since the total amount of air discharged from the fan 12 is blown into the inner body 1 from the gate 4j and the direction of the air is directed from the inside of the inner body 1 to the outlet 4b, Objects can be effectively discharged from the outlet 4b. Then, the front door is closed to generate more air pressure until a part of the material to be dried, for example, about half of the material to be dried is taken out. After the part to be dried is taken out, the front door is fully opened, the suction resistance is further reduced, the air volume and the wind speed are increased, and the air to be dried remaining in the inner body is increased in air speed and pressure. Since the object to be dried is taken out by applying a flow, the object to be dried can be efficiently taken out and labor can be saved.

In the above, if the configuration is made with emphasis on the drying of the object to be dried, the reflux passage is not necessary. Therefore, the configuration of the first embodiment is as follows.
(1) An inner body 1 having a horizontal cylindrical shape made of a perforated plate supported on a frame 4 so as to be driven to rotate and having openings at both ends, which are open at a side where a material to be dried is taken in and out, and an outer side of the body 1 A frame 4 having an outer body 3 fixedly mounted at an interval from the inner body 1 and having both ends sealed between the inner body 1 and an air inlet 8a provided in the frame 4 for heating external air to be taken in. A heater 9, an inlet-side air passage 8 that guides heated air passing through the heater 9 to both ends of the inner shell 1, and guides air flowing to the outer shell 3 through the perforated plate of the inner shell 1 from the outer shell 3 to the outside. An outlet-side air passage 16 and a fan 11 for generating an air flow in the order of the inlet-side air passage 8, the inner body 1, the outer body 3, and the outlet-side air passage 16 are provided. The heated air is blown into the inner body of the dryer to dry the object to be dried.

According to this configuration, the hot air guided to the object to be dried reaches the object to be dried through the inlet-side air passage having a small air resistance. Since hot air hits from both sides of the object, the area of the object to be dried hit by the hot air is large. When simply considered, when hot air is applied to the object to be dried from one side of the inner body, the area is twice as large as the area where the hot air hits the dried object. Therefore, the drying is effectively performed in tandem with the airflow that causes a loss of air due to the blowing of hot air from both sides of the inner body. According to the embodiment, the drying time is short both in the case where hot air is blown into the inner body from one side and in the case where hot air is blown into the inner body through the pores of the inner body. Since the hot air heated by the heater is used efficiently and the drying time is short, energy consumption is small and energy is saved.

According to the embodiment of the first embodiment, the drying time of the lightly-dried material is 20 minutes in the conventional example in the dryer in which the throughput of the dried material is 50 kg at one time, but is 13 minutes in the example of the present invention. Was shortened significantly.

Next, in the above configuration (1), a configuration that facilitates drying of the object to be dried and removal from the dryer after the cooling step includes:
(2) In the above (1), the frame 4 has a front door 5a which is an opening / closing member which can be opened and closed corresponding to the input side opening of the inner body, and an input port 4a for a dried object, and a takeout side of the inner body 1. An outlet 4b for the object to be dried having a rear door 6a which is an opening / closing member which can be opened and closed corresponding to the opening, and a flow of air flowing from the air inlet 8a to the outlet 8b of the heater 9 and the outlet side air passage 16 A recirculation passage 22 diverging from the outlet air passage 16 downstream toward the gate 4j opening toward the input side opening of the inner body 1 and an air on the discharge side of the fan 12 in the outlet air passage 16 A damper 24 which is an air passage switching means for selecting whether to exhaust through the side air passage 16 or to return to the inlet side opening of the inner body through the return passage 22. The inner trunk 1 It is configured to feed into the inlet-side opening.

According to this configuration, the dried object after the drying and cooling steps can be easily taken out. In particular, the entire amount of air discharged by the fan is guided to the inlet side opening of the inner body, and the discharge side air volume generated by the fan and the blowing air with a large wind speed are blown onto the object to be dried. it can.

Next, a dryer equipped with a heater with high thermal efficiency will be described. FIG. 7 is a view schematically showing another embodiment of the heater in FIGS. 2 and 3.

In the figure, the heater 9 is provided with a front drain heater 9b using hot water as a heat medium on the outside side (air inlet 8a side) of the steam heater 9a using high-temperature steam as a heat medium. The steam heater 9a is provided with a pipe 9c for discharging drain. The pipe 9 c is connected to the inlet side of the drain trap 18. The pipe 9d connected to the outlet of the drain trap 18 is connected to the inlet of the front drain heater 9b. High-temperature steam sent from a boiler (not shown) is supplied to the steam heater 9a from inlets 9a1 and 9a2. The steam heater 9a heats the outside air when the outside air passes from the air inlet 8a to the outlet 8b, and lowers the temperature and the pressure thereof. Therefore, more moisture than can become saturated vapor at that pressure and temperature accumulates in front of the drain trap 18 as drain.

Here, the drain trap 18 includes a temperature control type, a desk type, a float type, and the like. When the drain trap 18 is opened, the high-temperature drain is sent to the water supply device of the boiler through the pipe 9d and the primary side of the front drain heater 9b. Outside air passing through the drain heater 9b from the air inlet 8a to the outlet 8b is preheated by the front drain heater 9b.

In summary, the heater 9 is a steam heater 9a which is a heat exchanger using steam as a heat medium. A front drain heater 9b which is a heat exchanger is provided on the outside air side of the steam heater 9a. A trap 18 is provided to allow the drain discharged from the drain trap 18 to flow into the primary side of the front drain heater 9b and to allow outside air to pass through the drain heater 9b and the steam heater 9a in this order.

As described above, in the heater of the dryer, the thermal energy previously discharged as the drain is used, so that the thermal efficiency of the heater for heating the drying air is improved.

In the first embodiment, the cooling process is performed with the front door 5a opened halfway, but a cool air inlet may be provided to take in the cool air as in the second embodiment described later.

(Embodiment 2)
In the first embodiment, one opening of the inner body is set to the input side of the object to be dried and the other opening is set to the extraction side. In the second embodiment, one opening of the inner body is used to input and remove the object to be dried. It is an input and output port.

FIGS. 9 to 13 show the second embodiment. FIG. 9 is a front view, and FIG. 10 is a side sectional view. In the description of the second embodiment, the same reference numerals are given to the functional members corresponding to the first embodiment, and the detailed description of the members is referred to the description in the first embodiment.

(4) The lower semicircular side of the race 1c of the inner body 1 is supported by four rubber rollers 2 (see FIG. 12). The rubber roller 2 is rotatably supported by a frame 4 via a bearing. Although not shown, an auxiliary roller pair rotatably supported by the frame 4 is in contact with the outer side surfaces of the raceway 1c before and after the inner barrel 1 to stop the axial movement of the inner barrel 1. At least one coaxial pair of the rubber rollers 2 is connected to a motor 19 of a driving device via a power transmission member such as a chain transmission device 21. The motor 19 is fixed to the frame 4.

Here, the control of the motor 19 is the same as in the first embodiment.

外 An outer shell 3 is provided at a distance from the outer circumference of the inner shell 1. Both ends of the outer shell 3 are sealed with the inner shell 1. The outer shell 3 is connected to be integral with the frame 4. The outer trunk 3 is composed of outer trunk plates 3g and 3h, an upper plate 4f, and a part of the side plate 4y across the front end plate 3c and the rear end plate 3d. The shape of the outer trunk 3 in FIG. 9 is substantially octagonal of abcdcefagha, and both ends are connected to the lines of the front end plate 3c and the rear end plate 3d. It is a closed shape. The corners of the upper outer body plate 3g, the upper plate 4f of the frame, and the side plate 4y are formed in a tunnel shape in the front-rear direction of the dryer, forming a branch passage 8d (described later). The outer trunk plate 3h constitutes an outer trunk outlet 3b which is open and serves as an air outlet. A front door device 5 is provided on the front end side of the frame 4. The front door device 5 is an opening / closing member that opens and closes a loading port 4v for loading and unloading articles to be dried such as clothes. The front door device 5 is an outward opening door. The inlet / outlet 4v and the opening at one end of the inner trunk 1 are at correspondingly corresponding positions. The charging port 4v is provided by opening the frame 4.

投入 The inlet / outlet 4v for the material to be dried with respect to the inner body 1 is circular. The inlet 4v is provided on the front side plate 4c in the direction perpendicular to the plate surface in front of the frame 4. The front side plate 4c is offset at the upper part of the introduction port 4v and protrudes toward the front side to form an end plate 4n. The charging port 4v passes between the outside and the inner body 1.

前 As shown in FIG. 9, the front door 5a is rotatably supported by engaging with a vertical hinge pin 5e provided near the introduction port 4v. Both ends of the hinge pin 5e are fixed to the front side plate 4c of the frame 4. The front door 5 is provided with a handle 5d for opening and closing operation. When the handle 5d is pulled toward the user, the front door 5a rotates about the hinge pin 5e to open the inlet / outlet 4v.

The end plates 3c and 3d are close to the end of the inner body 1 and are sealed by a sealing member (not shown). The end plates 3c and 3d are provided with blowing ports 3e and 3f (see FIGS. 11 and 13). The blowing port 3e is opened at the upper part of the front end plate 3c so as to communicate with the upper part of the inner trunk. The air inlet 3f is provided in the rear end plate 3d and opens slightly below the center of the rear portion of the inner body 1. Therefore, the blowing ports 3e and 3f are located at positions different from the opposing positions. In this example, it is difficult to move up and down, but it is also possible to make a difference in left and right or diagonally. The blowing port 3e is arc-shaped (almost crescent-shaped). The blowing port 3f can have various shapes. In this example, as shown in FIG.

空 気 As shown in FIG. 10, an air inlet 8a is provided on the rear side of the frame 4. A heater 9 is provided at the air inlet 8a. The heater 9 is a heat exchanger or the like in which the heat medium is steam. The heater 9 is supported by the frame 4.

The upper part, the front part, and the back part of the frame 4 constitute an inlet-side air passage 8 with the outer shell 3. The air passage 8 is provided between the upper plate 4f of the frame 4, the side plate 4y and the outer trunk plate 3g (upper left and right in FIG. 9), the rear end plate 4p of the frame 4 and the rear end plate 3d of the outer trunk 3, and the front end of the upper part of the frame 4. It is constituted between the plate 4n and the front end plate 3c of the outer shell 3. The air passage 8 has an air inlet 8a → a heater 9 → a heated air outlet 8b → a branch space 8c → branch passages 8d, 8e → blowers 3e, 3f → the inner body 1. The branch passage 8e is substantially short, and is immediately separated from the branch passage 8d in the branch space 8c.

リ ン As shown in FIG. 10, a lint box 25 is provided at the outer body outlet 3b, which is an air outlet provided following the outer body 3, so that it can be taken in and out from the near side of the dryer. The lint box 25 is provided with a lint bag 26. Exhaust including cotton dust from the outer trunk outlet 3b is removed by the lint bag 26 which is coarser than the dust bag filter. When the lint box 25 is mounted on the frame 4, the rear side thereof is joined to the blow-in port 12 a of the dehumidification fan (hereinafter, referred to as a fan) 12 so as to communicate with the fan 12.

The outlet of the fan 12 is exhausted through an exhaust duct (not shown).

冷 A cold air intake 4x is opened in the front end plate 4n of the frame 4. A cool air damper 27 for opening and closing the cool air intake 4x is provided. The cold air damper 27 is pivotally attached to the front end plate 4n at the upper edge by a horizontal axis hinge 27a at the front end plate 4n. When the cool air damper 27 opens the cool air intake 4x, the lower edge of the cool air damper 27 comes into contact with the front end plate 3c of the outer shell 3, and the cool air intake 4x communicates with the inside of the inner body 1 via the blow opening 3e. ing. At this time, the branch passage 8d is closed by the cold air damper 27. In order to better block the branch passage 8d by the cool air damper 27, for example, a partition wall that surrounds the left and right when viewed from the front of the damper 27 may be provided.

Therefore, the cold air damper 27 serves as an air passage switching means for selectively blowing heated air and outside air to the blowing port 3e. Although not shown, the cool air damper 27 is opened and closed using a fluid pressure cylinder and a link device. It can also be opened and closed manually.

作用 The operation of the above configuration will be described. The operation is performed in the order of the material to be dried step, the drying step, and the cooling step. In the operating state, the heater 9 is always energized.

(Drying material input process)
The front door 5a is opened, and articles to be dried such as cloth and clothes after washing are thrown into the inner trunk 1 from the throw-in port 4v. Close the front door 5a.

(Drying process)
Before starting, the cold air damper 27 closes the cold air intake port 4x. A sensor (not shown) detects that there is an object to be dried in the inner body 1, and a signal indicating that the front door 5a is closed is input to the control device or a start switch (not shown) is turned on. Then, the motor 19 and the fan 12 are driven, and the drying process starts. The motor 19 drives the roller 2 via the chain transmission 21.

The inner body 1 is rotated by the rollers 2 while being supported by the rollers 2. As a result, the material to be dried held on the inner peripheral surface of the inner shell 1 that moves upward due to the function of the inner shell 1b is lifted, and the inner shell is biased obliquely upward at the upper part of the inner shell 1. , Fall, and lift again. Here, the movement of the inner trunk 1 is controlled by controlling the motor 19. That is, the inner body 1 is rotated forward or backward. In addition, the normal rotation and the reverse rotation are alternately repeated. The time for normal rotation and reverse rotation can be set arbitrarily. Further, the rotation speed of the inner body 1 is changed. By taking the form of the movement of the inner body 1 such that the normal rotation and the reverse rotation are alternately repeated, it corresponds to the type and the amount of the dried object. At the same time, air flows through the inlet-side air passage 8, the inner body 1, the outer body 3, and the outlet-side air passage by driving the fan 12. Since the pressure from the air inlet 8a to the fan 12 is negative due to the suction flow of the fan 12, the hot air does not leak out of the machine.

Next, the air flow will be described in detail. In FIG. 10, outside air is drawn in from the air inlet 8a as shown by the arrow A. Next, as shown by the arrow B, when the air sucked from the air inlet 8a passes through the heater 9, this air is heated and dried and exits to the heated air outlet 8b. The heated air that has exited to the heated air outlet 8b enters the branch space 8c. Then, a part of the heated air is split into the branch passage 8e and enters the inner body 1 from the blowing port 3f as shown by the arrow C. The remaining heated air travels in the upper outside of the outer shell 3 through the branch passage 8d as shown by the arrow 2 and wraps around the front side of the dryer, and enters the inner shell 1 from the blowing port 3e as shown by the arrow E.

Since the inflow passage of the heated air to the inner body 1 is an opening at both ends of the inner body 1, the throttle resistance when passing through the perforated hole and the perforated material are the dry matter as in a conventional example in which a perforated plate is passed from the outer body side. The loss of passing from the outside of the inner trunk to the inside of the inner trunk is eliminated due to a decrease in the passage area due to the partial blockage. Further, since heated air is blown from both sides of the object to be dried while being opposed to each other from the blowing ports 3e and 3f, the area to which the object to be dried is aerated is large. The object to be dried is brought to the center of the inner body 1 in the front-rear direction, so that the heated air does not act on only one side of the object to be dried. Hot air is blown from opposite ends of the inner body 1 mainly in the axial direction, and the object to be dried is lifted and dropped in the inner body 1 by the inner body bar 1b. Therefore, the object to be dried is efficiently dried. According to the present embodiment in which the blowing ports 3e and 3f are opposed to each other, the axial center in the direction perpendicular to the sheet of FIG. 10 is generated by the wind force of the heated air blown into the inner body 1 from the blowing ports 3e and 3f. As a result, the material to be dried tends to be rotated, so that hot air hits more surfaces of the material to be dried, and the material is dried efficiently. In the present embodiment, when the blowing port 3f is provided at the same height as the blowing port 3e, the action of the heated air in the inner body 1 on the object to be dried is the same as in the first embodiment.

Therefore, unlike the conventional type of dryer in which heated air is fed only from the inlet / outlet side, the object to be dried is not pressed to the inner side of the inner body so that the heated air cannot be effectively applied to the object to be dried.

The air whose temperature rises due to moisture being deprived of the material to be dried in the inner body 1 through the porosity of the inner body 1a as shown by an arrow in FIG. Get out. The exhaust gas flowing down this space 29 is collected at the outer trunk outlet 3b. Exhaust gas that has proceeded from the outer trunk outlet 3b as shown by the arrow G is removed as lint when passing through the lint bag 26, proceeds as shown by the arrow H, is drawn into the suction port 12a of the fan 12, and is discharged from the discharge port. Emitted outside the machine.

(Cooling process)
The cooling step is performed without deenergizing the heater 9 in the state of the drying step. Here, the forward or reverse rotation, forward / reverse rotation, rotation speed, forward / reverse rotation time of the inner body 1 can be set in the same manner as in the drying step. At this time, the cool air damper 27 is rotated from the solid line position in FIG. 10 to the dotted line position to open the cool air intake 4x. As a result, no airflow is sucked from the branch passage 8d. The outside air advances from the cool air intake port 4x to the blowing port 3e, is sucked into the inner body 1 from the blowing port 3e, enters the inner body 1, and applies the cool air to the material to be dried to cool the material to be dried. The air that has acted on the material to be dried and has risen in temperature passes through the perforations of the inner body 1 and exits between the inner body 1 and the outer body 3, and then is discharged from the outer body outlet 3 b through the air passage on the outlet side to the outside by the fan 12. Is done.

(4) When the cooling process is completed, the motor 19 is stopped to stop the rotation of the inner body 1. Further, the fan 12 is stopped. Open the front door 5a and take out the object to be dried.

The configuration of the second embodiment can be summarized as follows.
The frame 4 has a front opening 5a, which is an opening / closing member that can be opened and closed corresponding to one opening of the inner body 1, and a loading / unloading port 4v for loading and unloading the material to be dried. A supported inner cylinder 1 having a perforated horizontal cylinder and having openings opened at both ends, and an inner cylinder 1 fixedly mounted on the outer peripheral side of the inner cylinder 1 at a distance from the inner cylinder 1, and both ends fixed between the inner cylinder 1 and the inner cylinder 1. A frame 4 having an outer body 3 whose part is sealed; a heater 9 provided at an air inlet 8a of the frame 4 for heating the outside air to be taken in; and heating air passing through the heater 9 to open both ends of the inner body 1 An inlet-side air passage 8 that guides air; an outlet-side air passage that guides air flowing to the outer shell 3 through the perforated plate of the inner shell 1 from the outer shell 3 to the outside; and the inlet-side air passage 8, the inner shell 1, and the outer shell 3. And a fan 12 for generating an air flow in the order of the outlet air passages, Blowing the air heated to the inner cylinder in the openings at both ends of the cylinder 1 a dryer for drying the material to be dried.

According to this configuration, the drying time of the object to be dried and the energy saving are the same as those described in the first embodiment.

In the second embodiment, the front door may be opened halfway in the cooling step without providing the cool air intake.

Each of the drawings shows an embodiment of the present invention. FIGS. 1 to 8 show Embodiment 1 and FIGS. 9 to 13 show Embodiment 2.
It is a front view of a dryer. FIG. 2 is a side view of FIG. 1. It is a front sectional view of a dryer. It is a sectional side view of a dryer. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is sectional drawing which shows the other embodiment of a heater typically. It is a schematic perspective view of a dryer. It is a front view of a dryer. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a front center sectional view of a dryer. It is CC sectional drawing of FIG.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 ... Inner trunk 1a ... Inner trunk main body 1b ... Inner trunk bar 1c ... Track ring 2 ... Rubber roller 3 ... Outer trunk 3a ... Outer trunk part 3b ... Outer trunk outlet 3c ... Front end plate 3d ... Rear end plate 3e, 3f ... Inlet 3g ... outer body plate 4 ... body frame 4a ... input port 4b ... outlet 4c ... front side plate 4d ... square tube portion 4e ... missing cylindrical portion 4f ... upper plate 4g ... chord plate 4h, 4i ... gate plate 4j, 4k ... gate 4n, 4p ... End plate 4m ... Top plate 4q ... Side plate 4r ... Wind-off projection 4s ... Reflux inlet 4t ... Chute 4u ... Lower plate 4v ... Input outlet 4x ... Cold air intake 4y ... Side plate 5 ... Front door device 5a ... Front door 5b … Guide rail 5c… Hydraulic cylinder 5d… Handle 5e… Hinge pin 6… Rear door device 6a… Rear door 6b… Pivot 6c… Arm 6d… Clevis type cylinder 8… Inlet side air passage 8a… Air inlet 8b… Hot air outlet 8c … Branch space 8 , 8e ... branch passage 9 ... heater 9a ... steam heater 9a1, 9a2 ... inlet 9b ... front drain heater 9c ... pipe 9d ... pipe 11 ... exhaust duct 12 ... moisture exhaust fan 12a ... suction port 12b ... discharge port 13 ... dust removal filter 14 ... Exhaust duct 14a ... Inlet 14b ... Opening 14c ... Exhaust valve port 15 ... Exhaust port 16 ... Outlet side air passage 17 ... Auxiliary roller 18 ... Drain trap 19 ... Motor 21 ... Chain transmission 22 ... Reflux passage 23 ... Reflux duct 23a ... Reflux passage entrance 23b Reflux passage exit 24 Damper 24a Support point 25 Lint box 26 Lint bag 27 Cold air damper 27a Hinge 29 Space

Claims (5)

An inner trunk having openings at both ends in a horizontal cylindrical shape made of a perforated plate supported by a frame to be driven to rotate,
A frame having an outer trunk fixedly mounted on the outer peripheral side of the inner trunk with an interval between the inner trunk and both ends sealed between the inner trunk and the inner trunk;
A heater provided at an air inlet of the frame for heating the outside air taken in;
An inlet-side air passage that passes the heater and guides heated air to both ends of the inner body,
An outlet-side air passage that guides air flowing from the outer body to the outside through the perforated plate of the inner body,
A fan that generates an airflow in the order of the inlet-side air passage, the inner body, the outer body, and the outlet-side air passage;
And drying the object to be dried by blowing heated air from both ends of the inner body into the inner body. The frame is provided with an opening for an object to be dried having an opening / closing member that can be opened and closed corresponding to one opening of the inner body, and an object to be dried having an opening / closing member that can be opened and closed corresponding to the other opening of the inner body. An outlet, a recirculation passage branching from the outlet air passage downstream of the fan with respect to the flow of air flowing through the outlet air passage and reaching the input side opening of the inner body, and a discharge side of the fan of the outlet air passage Air passage switching means for selecting whether to discharge the air through the outlet side air passage or to return the air to the input side opening of the inner body through the return passage, and to discharge the air through the return passage when the material to be dried is taken out. The dryer according to claim 1, wherein the dryer is fed to an opening on the loading side. 2. The dryer according to claim 1, wherein the frame has an input port for inputting and extracting an object to be dried having an opening and closing member that can be opened and closed corresponding to one opening of the inner body. 3. A cold air intake port for taking in outside air provided on the frame, which communicates with an air passage leading to one opening of the inner body in the inlet side air passage,
Air passage switching means for closing one of the air passage and the cold air intake opening to one opening of the inner body and opening the other, and opening the outside air intake opening in the cooling step of the drying object to remove the drying object. The dryer according to any one of claims 1 to 3, wherein cooling is performed. The heater is a steam heater which is a heat exchanger using steam as a heat medium.A drain heater which is a heat exchanger is provided on the outside air side of the steam heater, a drain trap is provided in the heater, and the drain discharged from the steam heater is drain heater. The dryer according to any one of claims 1 to 3, wherein the dryer is caused to flow into a primary side of the air dryer, and the outside air is passed through the drain heater and the steam heater in this order.

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