JPH11337260A - Rotary drum type dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary drum type dryer having a good thermal efficiency to dry in a short time. SOLUTION: The rotary drum type dryer 10 heats the air from an inlet 14, brings the heated air into contact with a drying drum 18 having many pores provided at a periphery and rotatably driven to dry a clothing 22 therein and exhausts the treated air from an exhaust port 26. The dryer 10 comprises stopping means 28, 29 of the air flowing through gaps 23, 24 provided between the drum 18 and guide members 19, 20 at radial outside of the drum 18 and provided between guide members 19 and 20 so that the air of a high temperature flows to an exhaust port 26 via the drum 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a drum rotary dryer.

[0002]

2. Description of the Related Art A rotary drum dryer has been used as a commercial dryer. The structure is shown in FIG.
This will be described with reference to FIG. The drum rotary dryer 60 is configured such that the upper heating unit 11 and the central drying unit 62 are connected at the drying unit inlet 17, and the drying unit 62 and the discharge unit 13 are connected at the drying unit outlet 21.

[0003] The heating unit 11 includes an air inlet 14 provided on the upper surface or the rear surface of the drum rotary dryer 60, and a heat exchanger 15 disposed at the center of the heating unit 11 for heating the air.
It consists of The air from the inlet 14 passes through the heated air flow path 16 while being heated by the heat exchanger 15, and is introduced into the drying unit 62 from the drying unit inlet 17. Note that high-temperature steam passes through the heat exchanger 15. The drying unit 62 is provided with a large number of small holes around the center substantially,
The drying drum 18 is rotatably driven with the front-rear direction of the drum rotary dryer 60 as a rotation axis, and guide members 69 and 70 are provided symmetrically with a gap outside the drying drum 18 in the radial direction. ing. The drying drum 18
For example, an arrow a
, But may naturally rotate in the reverse direction. Also, during operation of the drum rotary dryer 60,
Laundry such as clothes 22 is stored inside the drying drum 18.

[0004] The heated high-temperature air introduced from the drying section inlet 17 provided above the drying section 62 hits the side surface of the drying drum 18 and heats the drying drum 18. Then, the air passes through air passages 73 and 74 formed by left and right gaps provided between the drying drum 18 and the guide members 69 and 70, and passes through a drying unit outlet 21 provided at a lower portion of the drying unit 62. 13 is discharged. The garment 22 is dried after being heated by the heated drying drum 18, and after drying, is taken out from an outlet (not shown) provided on the front of the drum rotary dryer 60.

The discharge section 13 is provided with a removable filter 25 and an exhaust port 26, but there are cases where no filter is provided. The processed air sent from the drying section outlet 21 to the exhaust port 26 is filtered by the filter 25 into the clothes 22.
The cotton-like dust 27 such as lint and dust coming out of the inside of the device is removed and discharged from the exhaust port 26. Drum rotary dryer 6
Although a means for blowing air passing through the inside of the exhaust port 26 is not shown, the air is normally sucked by a fan or the like attached to the outside of the exhaust port 26.

[0006]

However, the conventional drum rotary dryer has the following problems. The drying drum has many small holes, but when laundry such as clothes is stored, high-temperature air passes through the air flow path outside the drying drum, and almost all of the inside of the drying drum is removed. Did not pass. For this reason, the drying time was long. Since the high-temperature air used for drying was directly discharged, thermal efficiency was poor. The present invention has been made in view of such circumstances, and has as its object to provide a drum-rotary dryer that can be dried in a short time and has high thermal efficiency.

[0007]

According to the present invention, there is provided a semiconductor device comprising:
The drum rotary dryer described above heats air from the inflow port, hits a drying drum that is provided with a number of small holes around and is driven to rotate, dries the clothes inside, and after processing from the exhaust port, In a drum rotary dryer that discharges air, between the drying drum and a guide member provided with a gap radially outside the drying drum, a means for preventing air flowing through the gap is provided, Hot air was allowed to pass through the drying drum and flow to the exhaust port. According to a second aspect of the present invention, there is provided the drum rotary dryer according to the first aspect, wherein the blocking unit is directed to a downstream side of a gap between the drying drum and the guide member and to an upstream side. It consists of an air jet nozzle arranged.

According to a third aspect of the present invention, there is provided a rotary drum dryer according to the second aspect, wherein the air jet nozzle has an elongated opening parallel to the axial direction of the drying drum. According to a fourth aspect of the present invention, in the rotary drum dryer of the second aspect, the air ejection nozzle has a plurality of air outlets arranged at small intervals in an axial direction of the drying drum. . According to a fifth aspect of the present invention, in the drum rotary dryer, the blocking means is performed by a valve rotatably mounted in a gap between the drying drum and the guide member. The drum rotary dryer according to the sixth aspect is the first aspect of the invention.
5. The drum rotary dryer according to any one of the items 5, further comprising a heat exchanger that exchanges heat between exhaust gas discharged from the exhaust port and air flowing into the inflow port.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. As shown in FIG. 1, the drum rotary dryer 10 according to the first embodiment of the present invention has the same basic structure as a conventional drum rotary dryer 60 (second and third drum dryers). The same applies to the embodiment). Hereinafter, the air blocking means which is a feature of the present invention will be described in detail. An air flow path 23 comprising gaps formed between the drying drum 18 and the left and right guide members 19 and 20;
On the left and right sides of the drying unit outlet 21 (downstream side) 24, air ejection nozzles 28 and 29 which are examples of air blocking means provided in parallel with the axial direction of the drying drum 18 are elongated in parallel with the axial direction. The opening is arranged toward the upstream side. The air ejection nozzles 28 and 29 are connected to the heating air flow path 16 via control valves (not shown), respectively, so that the heating air can be ejected along the air flow paths 23 and 24 toward the drying unit inlet 17. However, without using the heated air from the heated air passage 16, the heated air can be sent from the outside of the drum rotary dryer 10 to the air ejection nozzles 28 and 29 to eject high-pressure air.

The flow of air in the drying section 12 during operation is shown in FIG.
Shown in The heated high-temperature air introduced from the drying unit inlet 17 flows through the air flow paths 23 and 24 toward the drying unit outlet 21 along the arrow b. Then, the air jetted from the air jet nozzles 28 and 29 flows back through the air flow paths 23 and 24 along the arrow c. At the point where each air hits, high pressure is applied to the air, and the air without escape passes through many small holes provided in the drying drum 18,
After passing through the inside of the drying drum 18 as indicated by an arrow d, it is discharged from the drying unit outlet 21. At this time, since the heated air passes through the clothing 22 shown in FIG. 1, the drying time can be reduced. Since the pressure inside the drum rotary dryer 10 varies depending on the air resistance of the clothes 22, the pressure can be adjusted to an optimum value by using the control valves provided on the air ejection nozzles 28 and 29.

A drum rotary dryer 1 according to the present embodiment.
At 0, the shape of the air ejection nozzles 28 and 29 is elongated, but air ejection ports may be provided at small intervals in the axial direction. In this case, since the cross-sectional area of the plane perpendicular to the flow direction of the air outlet can be reduced, the flow rate of air can be easily reduced or the pressure can be increased. Further, the production of the nozzle outlet is also facilitated. In addition, the air ejection nozzles 28, 2
The mounting position of the guide member 9 is not limited to the lower part of the guide members 19 and 20, but may be mounted at any position of the guide members 19 and 20 as long as the position blocks air passing through the air flow paths 23 and 24. it can. Also, the quantity can be set to an arbitrary number of 3 or more.

Next, a rotary drum dryer 30 according to a second embodiment of the present invention will be described with reference to FIG.
A ventilation valve, which is an example of a valve, is provided on the left and right sides of the drying passage outlet 36 of the air passages 34, 35 formed by gaps formed between the drying drum 31 and the left and right guide members 32, 33 as air blocking means. 37 and 38 are arranged.

In the present embodiment, the ventilation valves 37 and 38 are
U-shaped brackets 39, 40 fixed to ends 34a, 35a of the guide members 32, 33, which communicate with the air passages 34, 35 from the air passages 34, 35 to the drying section outlet 36, are rotatably mounted. A fixing means for stopping the ventilation valves 37 and 38 at a predetermined angle can fix the ventilation valves 37 and 38 at an arbitrary opening angle. The rotating means may be, for example, a combination of a motor and a gear mechanism, or a means for manually rotating a ventilation valve by a handle. When the drum rotary dryer 30 is operated, the ventilation valves 37 and 38 are respectively positioned at positions parallel to the radial direction of the drying drum 31 (the air flow paths 34 and 38).
35 (in a direction substantially perpendicular to the flow direction of the air flowing through the tube 35). The air during operation cannot flow through the air flow paths 34 and 35 because of the ventilation valves 37 and 38, and the drying drum 31
, And the clothes 41 are dried and discharged from the drying section outlet 36. At the end of operation, the ventilation valve 37,
Since 38 is fixed down to the position shown by the two-dot chain line, the air flow paths 34 and 35 can be easily cleaned.

In this embodiment, the mounting position of the ventilation valves 37, 38 is below the guide members 32, 33. However, if the position is such that air passing through the air passages 34, 35 is blocked, the guide members It may be mounted at any position of 32 and 33. Also, the number of attachments may be three or more.

Next, a drum rotary dryer 42 according to a third embodiment of the present invention will be described with reference to FIG. The drum rotary dryer 42 is connected to a heat pipe type heat exchanger 47, which is an example of a heat exchanger, via an intake duct 44 attached to an intake port 43 and an exhaust duct 46 attached to an exhaust port 45. I have. By the fans 48 and 49 provided in the heat pipe type heat exchanger 47, the air flowing from the air intake port 50 is heated by heat exchange with air discharged from the exhaust port 45 when passing through the preheating chamber 51, The air passes through the air inlet 43 from the air intake duct 44 and is introduced into the drum rotary dryer 42. Then, the air is further heated by the heat exchanger 52.

After passing through the inside of the drum rotary dryer 42, the air passes through the exhaust port 45 as the exhaust gas, passes through the exhaust duct 46, and passes through the exhaust chamber 53 of the heat pipe type heat exchanger 47. Here, after the temperature is sufficiently lowered by heat exchange, the air is discharged from the air outlet 54 into the atmosphere. The air introduced into the drum rotary dryer 42 is supplied to the preheating chamber 51.
When the heat exchanger 52 is heated by the heat exchanger 52, the time required for heating by the heat exchanger 52 can be reduced. In the present embodiment,
Although the air jet nozzles 55 and 56 are provided in the drum rotary dryer 42 as air blocking means, the valve shown in the second embodiment may be used.

The present invention is not limited to the above embodiment. For example, in the third embodiment, instead of the heat pipe heat exchanger 47, a once-through heat exchanger or a rotary regenerative heat exchanger is used. An exchange can also be used.
The position of the fan for sending air can also be set arbitrarily. For example, the fan can be attached directly above the drying drum to blow air directly to the drying drum.

[0018]

According to the drum rotary dryer of the first to sixth aspects, since the air blocking means is provided, the clothes can be dried in a short time. In particular, in the drum rotary dryer according to the second aspect, since the air blocking means comprises an air ejection nozzle, the drying time can be shortened by adjusting the internal pressure. In the drum rotary dryer according to the third aspect, since the air ejection nozzle has an elongated opening, air can be uniformly blown into the gap between the drying drum and the guide member, and the internal pressure can be stabilized. it can. In the drum rotary dryer according to the fourth aspect, since the air ejection nozzle has a plurality of air ejection ports, the pressure of the air ejected from the air ejection port can be easily increased. Claim 5
In the drum rotary dryer described, since the air blocking means is performed by a valve rotatably mounted in the gap,
The gap can be easily cleaned. In the drum rotary dryer according to claim 6, since a heat exchanger is provided,
Heat efficiency during heating can be improved, high-speed operation can be performed, and fuel costs can be saved.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a drum rotary dryer according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the internal structure.

FIG. 3 is a front sectional view of a drum rotary dryer according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a drum rotary dryer according to a third embodiment of the present invention.

FIG. 5 is a front sectional view of a drum rotary dryer according to a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Drum rotary dryer 11 Heating part 12 Drying part 13 Discharge part 14 Inlet 15 Heat exchanger 16 Heated air flow path 17 Drying part entrance 18 Drying drum 19 Guide member 20 Guide member 21 Drying part outlet 22 Clothing 23 Air flow path ( Gap) 24 Air flow path (gap) 25 Filter 26 Exhaust port 27 Cotton dust 28 Air ejection nozzle 29 Air ejection nozzle 30 Drum rotary dryer 31 Drying drum 32 Guide member 33 Guide member 34 Air flow path (gap) 34a end Unit 35 Air flow path (gap) 35a End 36 Drying unit outlet 37 Ventilation valve 38 Ventilation valve 39 Bracket 40 Bracket 41 Clothing 42 Drum rotary dryer 43 Inlet 44 Inlet duct 45 Exhaust outlet 46 Exhaust duct 47 Heat pipe heat Exchanger (heat exchanger) 48 fan 49 fan 50 air Inlet 51 Preheating chamber 52 Heat exchanger 53 Exhaust chamber 54 Air outlet 55 Air jet nozzle 56 Air jet nozzle

Claims (6)

[Claims] 1. Heating air from an inlet, hits a drying drum which is provided with a number of small holes around and is driven to rotate, dries the clothes inside, and discharges the treated air from an exhaust port. In the drum rotary dryer, a means for preventing air flowing through the gap is provided between the drying drum and a guide member provided with a gap radially outside the drying drum. A drum-type rotary dryer characterized in that it flows through the drying drum to the exhaust port. 2. The drum rotary dryer according to claim 1, wherein said blocking means comprises an air ejection nozzle disposed downstream of the gap between said drying drum and said guide member and facing upstream. 3. The drum rotary dryer according to claim 2, wherein the air ejection nozzle has an elongated opening parallel to an axial direction of the drying drum. 4. The drum rotary dryer according to claim 2, wherein the air ejection nozzle has a plurality of air ejection ports arranged at small intervals in an axial direction of the drying drum. 5. The drum rotary dryer according to claim 1, wherein the blocking means is performed by a valve rotatably mounted in a gap between the drying drum and the guide member. 6. The drum rotation according to claim 1, further comprising a heat exchanger for exchanging heat between exhaust gas discharged from the exhaust port and air flowing into the inflow port. Dryer.