JP2017205585A - Dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dryer capable of suppressing variation in temperature of dry air to be generated, when generating and circulating the dry air after being blown inside an internal trunk together with the outside air.SOLUTION: A dryer 1 includes a dry air supply/exhaust part 6 for supplying dry air heated by taking in the outside air into an external trunk and for exhausting the dry air inside the external trunk 3 to the outside. The dry air supply/exhaust part 6 is formed by: a supply part 52 for taking in the outside air, heating it and generating dry air and supplying it to an internal trunk 4; and an exhaust part 53 for exhausting the drying air after drying an object 10 to be dried inside the internal trunk 4 from the inside of the internal trunk 4. Between the supply part 52 and the exhaust part 53, a waste heat circulation part 94 is provided which introduces at least one part of the dry air after being blown to the object 10 to be dried inside the internal trunk 4 into the supply part 52, and which circulates at least one part of the dry air after being blown to the object 10 to be dried in the internal trunk 4. A circulation ratio of the dry air to be circulated is changed by an opening/closing operation of an intake damper 55 of the supply part 52 and an exhaust damper 69 of the exhaust part 53.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a dryer for drying laundry on which linen products such as sheets, pillowcases, towels, etc., and mops, mats, and the like are washed, and in particular, the laundry is heated with high-temperature dry air while rotating the inner body into which the laundry is placed. The present invention relates to a rotary drum type dryer that is sprayed onto a dryer to dry.

  Patent Document 1 proposes a dryer and a drying method for drying linen products such as sheets, pillow covers, towels, and laundry such as mops and mats. The dryer described in Patent Document 1 includes an outer body provided in a dryer housing, and an inner body (rotary drum) that is rotatably supported in the outer body and into which laundry is put. ing. In addition, a rotation drive mechanism that rotates the inner body inside the outer body, and a dry air supply / discharge that supplies dry air heated by taking in outside air into the outer body and discharges the dry air inside the outer body to the outside. Department.

  Then, the laundry is put into the inner body, and while the inner body is rotated in the outer body, dry air is supplied into the outer body, and mesh holes or a plurality of punches provided on the outer periphery of the inner body are provided. The laundry is dried by removing the moisture of the laundry by introducing dry air into the inside through the holes and spraying it on the laundry. The dry air after sprayed on the laundry in the inner body is discharged to the outside through the exhaust duct or is again introduced into the outer body as dry air by the circulation flow rate adjusting means.

JP 2007-61410 A

  However, when the drying air used again as the drying air by the circulation flow rate adjusting means is heated through the heat exchanger (heater) together with the outside air taken in from the outside air inlet, the outside air has a large flow rate or is circulated. When the flow rate of the drying air is large, the temperature of the drying air generated through the heat exchanger varies.

  That is, the flow rate of the drying air that is used again as the drying air by the circulating flow rate adjusting means is adjusted to a predetermined amount, but the flow rate of the outside air is not adjusted to the predetermined amount. Variation occurs. For this reason, temperature variation occurs in the drying air blown to the laundry in the inner body, and there is a case where the drying air having a predetermined temperature cannot be blown when being blown to the laundry.

  Therefore, the present invention provides a dryer that can suppress variations in the temperature of the drying air that is generated when the drying air that has been blown inside the inner body is circulated again with the outside air. With the goal.

One aspect of the present invention for solving the above problems is an outer trunk provided in a dryer casing, an inner trunk that is rotatably supported in the outer trunk and into which an object to be dried is placed, A rotary drive mechanism that rotates the inner body within the outer body, and a dry air supply / discharge unit that supplies the heated air by taking in outside air into the outer body and discharges the dry air in the outer body to the outside. A drying air supply / discharge unit that takes in outside air and heats it to form drying air and supplies it to the inner body, and to dry the material to be dried in the inner body A discharge section that discharges the subsequent dry air from the inner body, and an external air intake that the supply section is provided in the dryer case, an intake damper that adjusts the amount of air taken in from the external air intake, and an external air intake It is formed with a heater that heats the outside air taken in from, and the discharge part is inside the inner body The exhaust duct that exhausts the dry air, the exhaust blower that sucks the dry air in the inner body and discharges it into the exhaust duct, and the amount of the dry air exhausted into the exhaust duct is adjusted to the outside. The exhaust damper is formed between the supply unit and the discharge unit, and at least a part of the drying air blown to the object to be dried in the inner body is introduced into the supply part, and the object to be dried in the inner body. An exhaust heat circulation unit that circulates at least a part of the dry air after being blown on the exhaust air is provided, and the exhaust heat circulation unit is provided in the exhaust duct and the exhaust duct and the circulation duct that communicates with the outside air intake side. When the intake damper opens the external air intake fully and the exhaust damper opens the exhaust duct, the dry air in the exhaust duct is on the side of the external air intake. There is no circulation to the intake damper When the exhaust damper is in the fully closed state of the exhaust damper, the dry air in the exhaust duct is circulated to the outside air intake side, the opening / closing operation of the outside air intake of the intake damper, and the exhaust duct of the exhaust damper The drying air circulation ratio is set by the opening / closing operation.

  Further, as one aspect of the present invention, when reducing the circulation ratio for introducing and circulating the drying air after being blown to the object to be dried in the inner body, the outside intake port of the intake damper is opened. To increase the opening angle, set the opening angle to open the exhaust duct of the exhaust damper to a large value, and increase the circulation ratio, set the opening angle to open the outside air intake port of the intake damper to a small value. It has the control part which sets small the opening angle which opens the discharge part duct of this.

  Further, as one aspect of the present invention, the opening on the supply portion side of the circulation duct is opened and closed by an intake damper, and the intake damper is fully closed when the outside air intake is fully opened. It is characterized by becoming a state.

  According to the present invention, when the dry air blown in the inner fuselage is generated and circulated again together with the outside air, it is circulated with the air volume of the outside air introduced by the opening / closing operation of the intake damper and the exhaust damper. Since the air volume of the drying air is set, variation in the temperature of the generated drying air can be suppressed.

It is a perspective view which shows the dryer which concerns on embodiment of this invention. It is a front view which shows the dryer which concerns on embodiment of this invention. It is a side view which shows the dryer which concerns on embodiment of this invention. It is the cross-sectional schematic which showed the dryer which concerns on embodiment of this invention, and cut | disconnected along the IV-IV line of FIG. It is the cross-sectional schematic which showed the dryer which concerns on embodiment of this invention, and cut | disconnected along the VV line of FIG. It is the cross-sectional schematic which showed the dryer which concerns on embodiment of this invention, and cut | disconnected along the VI-VI line of FIG. It is a schematic sectional drawing which shows the dryer which concerns on embodiment of this invention, and shows a part cut | disconnected along the VII-VII line of FIG. FIG. 8 is a schematic cross-sectional view showing the dryer according to the embodiment of the present invention and showing another example of the seal structure shown in FIG. 7. FIG. 8 is a schematic cross-sectional view showing the dryer according to the embodiment of the present invention and showing another example of the seal structure shown in FIG. 7. It is a side view which shows the dryer which concerns on embodiment of this invention, and shows a drying wind supply / discharge part. It is a perspective view which shows the structure which cleans automatically the heater of the dryer which concerns on embodiment of this invention. It is a top view which shows the drying wind supply / discharge part of the dryer which concerns on embodiment of this invention. It is a front view which shows the drying wind supply / discharge part of the dryer which concerns on embodiment of this invention. The discharge part in the dryer which concerns on embodiment of this invention is shown, (a) is a front view, (b) is a side view, (c) is a rear view. It is a block diagram which shows the control part in embodiment of the dryer which concerns on this invention, the detection means which inputs a detection result to this control part, and the apparatus controlled by a control part. It is a flowchart which shows the effect | action of the flow regulating valve of the dryer which concerns on embodiment of this invention.

Hereinafter, embodiments of a dryer according to the present invention will be described in detail. The dryer according to the present invention is a so-called commercial dryer that dries linen products such as sheets, pillow covers, towels, and laundry such as mops and mats.
[Overall configuration of dryer and features of embodiment]

  As shown in FIGS. 1 to 3, the dryer 1 according to the present embodiment includes a box-shaped dryer casing 2 and a drying air arranged adjacent to one side of the dryer casing 2. It is comprised with the housing | casing 51 of the supply / discharge part 6. FIG. As shown in FIG. 4, the dryer 1 includes an outer body portion 3 provided in a dryer housing 2, and an inner body in which an object to be dried 10 is rotatably supported inside the outer body portion 3. The body 4, a rotational drive mechanism 5 that rotationally drives the inner body 4 in the outer body 3, and a dry air that is provided in the casing 51 and takes in outside air is supplied into the outer body 3 and the outside A drying air supply / discharge unit 6 for discharging the drying air in the body 3 to the outside;

  As shown in FIG. 4 and FIG. 5, the dryer 1 of the present embodiment includes a supply unit 52 that supplies dry air to the inside body 4 by the drying air supply / discharge unit 6 taking in outside air and heating it to form dry air. A discharge portion 53 that discharges the discharged dry air after drying the object to be dried 10 in the inner body 4 from the inner body 4 is integrally formed in the housing 51.

  As shown in FIG. 5, in the dryer 1 of the present embodiment, the exhausted dry air discharged from the inner body 4 is heated by the heater 56 together with the outside air taken in from the outside air inlet 54, and is supplied again into the inner body 4. An exhaust heat circulation section 94 is formed between the supply section 52 and the discharge section 53 in the casing 51.

  As shown in FIGS. 1, 3, 4, and 5, the dryer 1 according to the present embodiment includes an outside air inlet 54 provided in the casing 51 by the supply unit 52, and the outside air inlet 54. The intake damper 55 adjusts the amount of air taken in, and the heater 56 heats the outside air taken in from the outside air inlet 54. In the discharge part duct 67, a discharge part duct 67 through which the discharge part 53 discharges the dry air in the inner body 4, an exhaust blower 68 that sucks the dry air in the inner body 4 and discharges it into the discharge part duct 67, It is formed with an exhaust damper 69 (see FIG. 14) that adjusts the amount of dry air that has been discharged to the outside.

  Moreover, the dryer 1 of this Embodiment has the control part 12 which controls the drying operation by the dryer 1, and the control part 12 is in the inner trunk | drum 4 at the time of the drying initial operation which started the drying operation. The intake damper 55 is in a fully open state in which the opening area of the outside air intake 54 is maximized until the humidity of the exhausted dry air discharged from the inner body 4 after being sprayed on the object to be dried 10 falls below the first set value. The exhaust damper 69 is in a fully open state in which the opening area of the exhaust duct 67 is maximized.

Further, in the dryer 1 of the present embodiment, the exhaust heat circulation section 94 is provided in the circulation duct 79 that connects the discharge section duct 67 and the outside air inlet 54 side, and the discharge section duct 68, and the circulation duct 79. And a circulation port 78 that opens toward the top.
Then, when the intake damper 55 fully opens the outside air intake 54 and the exhaust damper 69 fully opens the discharge portion duct 67, there is no circulation of the dry air in the discharge portion duct 67 to the outside air intake 54 side. When the damper 55 fully closes the outside air intake 54 and the exhaust damper 69 fully closes the discharge portion duct 67, the dry air in the discharge portion duct 67 is introduced to the outside air intake 54 side, and the inner body 4 The drying air after being blown to the object to be dried 10 is circulated in the interior, and the opening / closing operation of the outside air intake 54 of the intake damper 55 and the opening / closing operation of the discharge duct 67 of the exhaust damper 69 cause the circulation ratio of the drying air to be increased. Is set.
Hereinafter, the detail of the dryer 1 which concerns on embodiment is demonstrated using drawing.
[Dryer casing]

  As shown in FIGS. 1 and 5, the dryer housing 2 is provided with a loading port 14 for loading the material to be dried 10 on the front surface 13 side, and as shown in FIGS. 5 and 6, A discharge port 15 is provided on the side to discharge the dried object to be dried. The loading port 14 is provided with a loading side opening / closing lid 16 that opens and closes the loading port 14 by moving up and down. The input side opening / closing lid 16 is provided with internal viewing windows 17 and 17 through which the inside of the dryer casing 2 can be viewed. Further, as shown in FIG. 6, the discharge port 15 is provided with a discharge-side opening / closing lid 18 that is supported by the dryer casing 2 so that the upper portion can rotate, and that opens and closes the discharge port 15 by rotating. . Further, the outer trunk portion 3 is provided integrally with the dryer casing 2 between the inlet 14 and the outlet 15.

  As shown in FIGS. 4, 5, and 6, the outer trunk portion 3 has a cylindrical shape, and one end wall 19 in the axial direction opens toward the charging port 14 of the dryer housing 2, and The other end wall 20 opens toward the discharge port 15 of the dryer housing 2. Further, the side wall 21 along the circumferential direction of the outer body 3 is provided with a drying air discharge port 22 on the lower side, and a drying air intake port 23 on the upper side of the dryer housing 2 and on the housing 51 side. Is provided. One side of an exhaust duct 24 disposed at the lower part of the outer body 3 is connected to the dry air outlet 22. The other side of the exhaust duct 24 is connected to a drying air supply / discharge unit 6 described later. The drying wind inlet 23 is connected to one side of the drying wind supply duct 25. The other side of the drying air supply duct 25 is connected to a drying air supply / discharge unit 6 described later.

  The drying wind inlet 23 is connected to one side of the drying wind supply duct 25. The other side of the drying air supply duct 25 is connected to a drying air supply / discharge unit 6 described later. The drying air supply duct 25 is provided with a cooling port 11 that opens upward. The cooling port 11 is closed when the dryer 1 is operating, and is opened after the drying operation by the dryer 1 is completed. By opening the cooling port 11, the object to be dried is cooled (cooled down).

  Then, the dry air generated by the dry air supply / discharge unit 6 is supplied into the outer body 3 through the dry air supply duct 25 and the dry air intake 23, and from the inside of the outer body 3, the dry air discharge port 22, the drying air after drying the object to be dried 10 through the exhaust duct 24 is discharged to the drying air supply / discharge unit 6 and exhausted or circulated. The drying air supplied into the outer body 3 is sent into the inner body 4 rotating in the outer body 3, and blown onto the object to be dried 10 put in the inner body 4.

[Inner body 4]
As shown in FIGS. 4, 5, and 6, the inner body 4 has a cylindrical shape, and one end surface 26 in the axial direction has an inner body inlet 27 that opens toward the inlet 14 of the dryer housing 2. The other end face 28 in the axial direction is formed with an inner trunk outlet 29 that opens toward the outlet 15 of the dryer casing 2. A plurality of drying air passage holes 31 are provided on the entire side wall 30 of the inner body 4 along the circumferential direction. The drying air supplied to the outer body portion 3 passes through the drying air passage hole 31, and the drying air is introduced into the inner body 4.

  In addition, six protrusions 32 are provided on the inner side of the side wall 30 of the inner body 4 at equal intervals in the circumferential direction. These protrusions 32 are long in the axial direction of the inner body 4, protrude from the inner surface of the side wall 30 toward the center of the inner body 4, and the tip is formed in an acute angle toward the center. When the inner body 4 rotates in the outer body 3, these protrusions 32 rake up the object to be dried 10 from the lower side to the upper side of the inner body 4, and the upper side of the inner body 4. The object to be dried 10 is dropped toward the lower side. At this time, the drying air that has passed through the drying air passage hole 31 is blown to the object to be dried 10.

[Seal mechanism]
Further, as shown in FIG. 7, annular members 33 and 34 are attached to both ends in the axial direction of the inner body 4 in the entire circumferential direction. The annular member 33 is provided on the inner trunk inlet 27 side of the inner trunk 4, and the annular member 34 is provided on the inner trunk outlet 29 side. The space between the annular member 33 and the end wall 19 of the outer body 3 is sealed by a sealing mechanism 35, and the space between the annular member 34 and the end wall 20 is sealed by a sealing mechanism 36.

  The seal mechanism 35 includes an opening edge 33a on the end wall 19 side of the annular member 33, a peripheral wall 19a that protrudes from the end wall 19 toward the inner side of the outer body 3 and is provided in the entire circumferential direction, and an opening edge. 33a and a sealing member 35a provided between the peripheral wall 19a. The seal mechanism 36 is formed by an outer peripheral surface 34a of the annular member 34, an inner peripheral surface 20a of the end wall 20, and a seal member 36a provided between the outer peripheral surface 34a and the inner peripheral surface 20a.

  By these sealing mechanisms 35, 36, the drying air introduced into the inner body 4 is discharged from between the axial ends of the inner body 4 and the outer body 3 without being sprayed on the object to be dried 10. Can be prevented.

  Moreover, the structure shown in FIG. 8 may be sufficient as the seal mechanism of the axial direction of the inner trunk | drum 4 and the outer trunk | drum 3. FIG. In the structure shown in FIG. 8, annular members 37 and 38 are respectively attached to both ends in the axial direction of the inner body 4 in the entire circumferential direction. The annular member 37 is provided on the inner trunk inlet 27 side of the inner trunk 4, and the annular member 38 is provided on the inner trunk outlet 29 side. The space between the annular member 37 and the end wall 19 of the outer body 3 is sealed by a sealing mechanism 39, and the space between the annular member 38 and the end wall 20 is sealed by a sealing mechanism 40.

  The seal mechanism 39 is formed by an outer peripheral surface 41b of the opening end 41a of the peripheral end wall 41, an inner peripheral surface 19b of the end wall 19, and a seal member 39a sandwiched between the outer peripheral surface 41b and the inner peripheral surface 19b. Yes. The peripheral end wall 41 has a disc shape, is fixed to the annular member 37, and faces the end wall 19 to constitute an end wall of the inner trunk insertion port 27 of the inner trunk 4. Further, the seal member 39 a is disposed at the axial center side of the inner body 4, that is, at a position close to the inner body insertion port 27.

  Further, a corner embedded member 44 that is inclined from the seal member 39 a side of the peripheral end wall 41 toward the inner wall of the inner body 4 is provided at the corner formed by the peripheral end wall 41 and the side wall 30 of the inner body 4. Further, a peripheral wall 42 extending from the inner peripheral surface 19b of the end wall 19 toward the inner trunk discharge port 29 is provided inside the seal member 39a. The peripheral wall 42 is provided on the inner trunk insertion port 27 of the seal member 39a. It is provided to cover the side

  The seal mechanism 40 includes an annular member 38, a peripheral end wall 43 that is fixed to the annular member 38 and faces the end wall 20 and serves as an end wall of the inner trunk discharge port 29 of the inner trunk 4, and an inner peripheral surface 20 a of the end wall 20. The annular member 38, the peripheral end wall 43, and the sealing member 40a disposed inside the inner peripheral surface 20a are formed.

  And the said sealing mechanisms 39 and 40 do not produce a clearance gap between the inner trunk | drum 4 and the outer trunk | drum 3 in the injection | throwing-in side and discharge side of the to-be-dried material 10. As a result, the drying air introduced into the inner body 4 does not flow between the outer body 3 and the inner body 4, and all the drying air introduced into the inner body 4 is blown onto the object to be dried. become. Furthermore, since there is no gap between the inner body 4 and the outer body 3 on the input side and the discharge side of the object to be dried, the object to be dried 10 in the inner body 4 is not caught in the gap.

 In addition, since the seal member 39a is located between the opening end 41a of the peripheral end wall 41 and the inner peripheral surface 19b of the end wall 19, the object to be dried in the inner body 4 and the seal member 39a do not contact each other. The seal member 39a is not damaged. Further, by providing the sealing member 39a on the axial center side of the inner body 4 and providing the corner embedded member 44, the object to be dried 10 is placed at the corner where the annular member 37 and the peripheral end wall 41 of the inner body 4 are continuous. There is no stagnation.

  Moreover, the structure shown in FIG. 9 may be sufficient as the axial direction sealing mechanism of the inner trunk | drum 4 and the outer trunk | drum 3. FIG. In the structure shown in FIG. 9, outer annular members 107 and 111 are respectively attached to both ends in the axial direction of the inner body 4 in the entire circumferential direction. The outer annular member 107 is provided on the inner cylinder insertion port 27 side of the inner body 4, and the outer annular member 111 is provided on the inner cylinder discharge port 29 side. The space between the outer annular member 107 and the end wall 19 of the outer body 3 is sealed by a sealing mechanism 105, and the space between the outer annular member 111 and the end wall 20 is sealed by a sealing mechanism 106.

  The seal mechanism 105 is formed by an outer peripheral surface 109a of the inner annular member 109, an inner peripheral surface 19b of the end wall 19, and a seal member 105a sandwiched between the outer peripheral surface 109a and the inner peripheral surface 19b. The peripheral end wall 108 is formed by stacking two disc-shaped plate materials, and constitutes an end wall of the inner trunk insertion port 27. An inner annular member 109 is fixed to the inner side of the peripheral end wall 108 (on the axial center side of the inner body 4) so as to face the end wall 19. A concave groove 109b is formed on the surface of the inner annular member 109 facing the inner peripheral surface 19b, and the seal member 105a is inserted into the concave groove 109b. Further, the seal member 105 a is disposed at the axial center side of the inner body 4, that is, at a position close to the inner body insertion port 27. A peripheral wall 110 extending from the inner peripheral surface 19b of the end wall 19 toward the inner trunk discharge port 29 is provided inside the seal member 39a. The peripheral wall 110 is provided so as to cover the seal member 105 a and the inner annular member 109.

  The seal mechanism 106 includes a seal member sandwiched between the outer peripheral surface 112a of the inner annular member 112 fixed to the outer annular member 111, the inner peripheral surface 20a of the end wall 20, and the outer peripheral surface 112a and the inner peripheral surface 20a. 106a. Further, the inner cylinder outlet 29 side of the end wall 20 extends toward the inner cylinder inlet 27 to form a peripheral wall portion 20b. The peripheral wall portion 20b is provided so as to cover the seal member 106a and the inner annular member 112. The seal mechanism 105 and the seal mechanism 106 have the same functions and effects as the seal mechanisms 39 and 40 shown in FIG. When the inner body 4 is rotated in one direction by the rotation drive mechanism 5 with respect to the outer body 3, the seal member 105 a always slides on the inner peripheral surface 19 b of the end wall 19.

[Rotation drive mechanism]
As shown in FIGS. 4 and 5, the rotation drive mechanism 5 rotates four drive rollers 50, 50, 50, 50 that rotatably support the inner body 4 in the outer body 3, and the drive rollers. A motor 48 to be driven, two rotating shafts 47 and 47 that transmit driving force to the driving rollers 50, 50, 50, and 50, and a transmission belt 45 that transmits the rotational driving force of the motor 48 to the rotating shafts 47 and 47 It is formed with. Two drive rollers 50, 50, 50, 50 are arranged on both sides of the lower portion of the inner body 4, and support the inner body 4 at the four corners on the lower side. The two driving rollers 50 and 50 on the drying air supply / discharge unit 6 side and the two driving rollers 50 and 50 on the opposite side of the drying air supply / discharge unit 6 are connected to the rotating shaft 47, respectively. The rotary shafts 47 and 47 are connected to the transmission belts 45 and 45.

  Thereby, the rotational driving force of the motor 48 is transmitted to the rotating shafts 47 and 47 via the transmission belt 45, and the driving rollers 50, 50, 50 and 50 are rotationally driven. Each drive roller 50, 50, 50, 50 is rotatably supported on the dryer housing 2 by a bearing (not shown). A pulley (not shown) is provided on one end side of the rotary shafts 47, 47. A transmission belt 45 is wound around the pulley and the drive shaft of the motor 48. The drive rollers 50, 50, 50, 50 are arranged outside the outer body portion 3, and a part of the outer periphery penetrates the side wall 21 of the outer body portion 3 and protrudes into the inner body 4. The inner body 4 is placed on the part.

  Then, the inner body 4 is rotated in the outer body portion 3 by rotating the rotating shafts 47 and 47 with the rotational driving force of the motor 48. In the inner body 4 that rotates in the outer body 3, the dry air generated by the drying air supply / discharge unit 6 is introduced, and the object to be dried put in the inner body 4 is fried in the inner body 4. Then, the drying air from the drying air supply / discharge unit 6 is blown.

[Dry air supply / discharge unit]
As shown in FIGS. 4 to 6, the drying air supply / discharge unit 6 is integrally incorporated in a box-shaped housing 51 disposed on the side of the dryer housing 2 and takes in outside air. A supply unit 52 that heats to form dry air and supplies it into the outer body 3, and a discharge unit 53 that discharges the dry air after drying the object to be dried in the inner body 4 from the inner body 4. Is formed. The supply unit 52 includes an outside air inlet 54, an intake damper 55 that adjusts the amount of air taken in from the outside air inlet 54, and a heater 56 that heats outside air taken in from the outside air inlet 54.

  As shown in FIGS. 4 to 6 and 10, the outside air intake 54 is formed in a rectangular shape on the upper portion of the housing 51 and the side wall 57 of the front surface 13. An intake damper 55 is provided at the outside air inlet 54. The intake damper 55 is formed by four rotating lids 58 (58a, 58b, 58c, 58d) and a drive mechanism 59 that rotates these rotating lids 58. The four rotating lids 58a, 58b, 58c, 58d are rectangular and are arranged at equal intervals between the upper and lower frames 60, 61 of the outside air inlet 54.

  Further, the rotation lids 58a, 58b, 58c, 58d are rotatably supported at both ends in the longitudinal direction by upper and lower frames 60, 61 via support shafts 62 (see FIGS. 12 and 13), respectively. In a state where the four rotating lids 58a, 58b, 58c, and 58d are rotated by approximately 90 degrees, the outside air inlet 54 is fully opened by the four rotating lids 58a, 58b, 58c, and 58d, and is not rotated. Then, the four rotating lids 58a, 58b, 58c, and 58d cover the outside air inlet 54, and the outside air inlet 54 is fully closed.

  Therefore, outside air is introduced into the casing 51 from between the four rotating lids 58a, 58b, 58c, and 58d in a state of being in a direction intersecting the outside air inlet 54, that is, in a rotated state. Every time the four rotating lids 58a, 58b, 58c, and 58d are rotated, the space between the four rotating lids 58a, 58b, 58c, and 58d is increased, and the flow rate of outside air introduced into the housing 51 is increased. . The rotation angle of the rotation lids 58a, 58b, 58c, 58d is controlled by the drive mechanism 59.

  As shown in FIGS. 12 and 13, the drive mechanism 59 includes a parallel link mechanism 63 disposed above the outside air inlet 54 and an air cylinder 64 that drives the parallel link mechanism 63. The parallel link mechanism 63 includes levers 65, 65, 65, 65 each having one end fixed to support shafts 62, 62, 62, 62 rotatably supported by the upper frame 60, and these levers 65, 65. , 65, 65 are formed with a drive link 66 in which the other ends of the 65 and 65 are rotatably connected. The drive link 66 is connected to the drive shaft 64 a of the air cylinder 64.

  When the drive shaft 64a of the air cylinder 64 is in the cylinder, as shown in FIG. 12, the rotating lids 58a, 58b, 58c, 58d are in a state of intersecting the outside air inlet 54, and the outside air As the intake port 54 is fully opened and the drive shaft 64a protrudes from the cylinder, the drive link 66 slides and rotates each lever 65. By rotating each lever 65, the rotation lids 58a, 58b, 58c, 58d are gradually rotated, and the gap between the outside air inlets 54 is reduced. In a state where the drive shaft 64a protrudes from the cylinder to the maximum, the rotation lids 58a, 58b, 58c, 58d are in parallel with the heater 56, and the outside air inlet 54 is fully closed. Thereby, the amount of outside air taken in from the outside air inlet 54 can be controlled. The outside air taken in from the outside air inlet 54 is heated by passing through the heater 56.

  The heater 56 is formed by arranging the erotic fin tubes in multiple stages. The erotic fin tube is a tube in which fins are spirally wound around the outer periphery of a pipe, and heats the air passing between the spiral fins by causing high-temperature steam to flow in the pipe. Further, the erotic fin tube communicates with a steam generator (not shown) and a steam supply pipe 98 (see FIG. 10). A flow rate adjusting valve 97 is provided in the middle of the steam supply pipe 98. The flow rate adjusting valve 97 is opened and closed by the control unit 12 to adjust the flow rate of the steam flowing in the erotic fin tube.

Therefore, the outside air introduced from the outside air inlet 54 is heated by passing between the spiral fins of the multi-staged erotic fin tubes, and dry air is generated. For this reason, since dust contained in the outside air adheres to the helical fin of the erotic fin tube, an automatic cleaning mechanism 100 for cleaning the heater 56 is provided.
[Automatic cleaning mechanism]

  As shown in FIG. 11, the automatic cleaning mechanism 100 includes an injection nozzle 101 that injects a cleaning liquid onto the heater 56, a cleaning liquid supply unit 102 that supplies the cleaning liquid to the injection nozzle 101, and a heater 56 that is injected into the heater 56. The recovery unit 103 collects the cleaning liquid after cleaning and the flow rate adjustment valve 104 that adjusts the flow rate of the cleaning liquid to the cleaning liquid supply unit 102. The four injection nozzles 101 are arranged on the upper portion of the heater 56 and are provided in the casing 51 at equal intervals in the longitudinal direction of the heater 56. These spray nozzles 101 are attached to the tips of four supply pipes 102 a extending from the cleaning liquid supply unit 102 toward the top of the heater 56 so as to spray the cleaning liquid toward the heater 56. Further, a recovery unit 103 is provided on the lower side of the heater 56, and the cleaning liquid that is sprayed on the upper side of the heater 56 and flows to the lower side is recovered.

  When tap water is used as the cleaning liquid, the injection pressure from the injection nozzle 101 can be adjusted by adjusting the flow rate of tap water using the flow rate adjusting valve 104 as described above. When another fluid is used as the cleaning liquid, a pressure feed pump for pumping the cleaning liquid to the cleaning liquid supply unit 102 may be used to apply pressure to the cleaning liquid and adjust the injection pressure from the injection nozzle 101.

  And the washing | cleaning liquid (tap water) by which the flow volume was adjusted with the flow control valve 104 was sprayed from the four injection nozzles 101, 101, 101, 101 to the heater 56, ie, the helical fin of the erotic fin heater, respectively. The dust or the like adhering to the fins and pipes is washed down and is collected by the collection unit 103. Therefore, after the operation of the dryer 1 is stopped, the cleaning liquid can be directly sprayed from the spray nozzle 101 to the heater 56 for automatic cleaning.

  Thereby, it is not necessary to take out the heater 56 from the casing 51, clean the heater 56, and reassemble the heater 56 in the casing 51. In addition, when cleaning the heater 56, the filter can be cleaned together with the heater 56 by changing the angle of the spray nozzle 101 and spraying the cleaning liquid onto the filter on the outside air inlet side of the heater 56. In addition, when the drying air discharged from the inner body 4 is circulated and used, even if dust such as lint from the material to be dried mixed in the drying air adheres to the heater 56, it is automatic. It can be easily cleaned and removed by the cleaning mechanism 100, and the supply unit 52 can generate clean dry air that does not contain dust or the like.

  The generated dry air is supplied from the dry air intake 23 of the outer body 3 through the dry air supply duct 25 into the outer body 3 and introduced into the inner body 4. 22 is discharged to the discharge unit 53.

  As shown in FIGS. 4 to 6 and 14, the discharge portion 53 includes a discharge portion duct 67 having one side communicating with the exhaust duct 24 in the dryer housing 2 and having an exhaust port 74 provided on the other side. An exhaust blower 68 that is provided in the middle of the discharge part duct 67 and sucks out the dry air in the outer body part 3 from the inside of the outer body part 3 through the exhaust duct 24 and discharges it into the discharge part duct 67, and the discharge part duct 67. Is formed with an exhaust damper 69 that exhausts all the dry air (discharged dry air) after being blown against the object to be dried 10 in the inner body 4 or circulates a part of the exhausted dry air. Has been.

  As shown in FIG. 4, the discharge part duct 67 includes a connection duct 70 that communicates with the exhaust duct 24, a blower casing 71 that houses the exhaust blower 68, and an exhaust / circulation duct 72 that extends upward from the blower casing 71. And is formed. The connecting duct 70 communicates with the exhaust duct 24 on the lower side of the dryer casing 2 on the lower side of the casing 51. The blower casing 71 is provided on the lower side of the casing 51, and a blower fan 73 of the exhaust blower 68 is incorporated therein.

  An exhaust / circulation duct 72 extending upward from the blower casing 71 is provided adjacent to the supply section 52 as shown in FIG. As shown in FIGS. 12, 14 (a), 14 (b) and 14 (c), an exhaust port 74 is formed on the upper end side of the exhaust / circulation duct 72, and the side walls 75, 76 adjacent to the supply unit 52 are provided on the side walls 75, 76. The circulation ports 78 are respectively provided at four locations along the vertical direction. These circulation ports 78 communicate with a circulation duct 79. The circulation duct 79 communicates with the outside air intake 54, and the outside air intake 54 side and the circulation port 78 are opened and closed by a rotation lid 58 a provided adjacent to the circulation duct 79 among the four rotation lids 58 of the intake damper 55. The The rotary lid 58a closes the exhaust / circulation duct 72 when the outside air inlet 54 is fully opened (that is, the rotary lid 58 is positioned at a position where the opening area is maximized).

  As shown in FIGS. 13A, 13B, and 13C, the exhaust damper 69 includes two opening / closing lids 80 and 81 rotatably supported by the side wall 77, and a rotation shaft of the opening / closing lid 80. A rotation drive lever 82 fixed to one end of 80a, an air cylinder 83 that rotates the rotation drive lever 82 around the rotation shaft 80a, and the other end of the rotation shaft 80a of the opening / closing lid 80 are fixed. The upper rotation lever 84, the lower rotation lever 85 fixed to the rotation shaft 81a of the opening / closing lid 81 on the same side as the other end of the rotation shaft 80a of the opening / closing lid 80, the upper rotation lever 84 and the lower rotation The connecting lever 86 is connected to the moving lever 85.

  When the drive shaft 83a of the air cylinder 83 moves in and out of the cylinder, the open / close lids 80 and 81 rotate around the rotation shafts 80a and 81a in the discharge portion duct 67 to open and close the discharge portion duct 67. When the drive shaft 83a of the air cylinder 83 protrudes, the open / close lids 80 and 81 are located on the side wall 77 side and the discharge portion duct 67 is fully opened. At this time, in the intake damper 55 of the outside air inlet 54, the rotating lid 58a closes the circulation duct 79. In a state where the drive shaft 83a is drawn into the cylinder, the open / close lids 80 and 81 are separated from the side wall 77 and the discharge portion duct 67 is closed to be fully closed. At this time, in the intake damper 55 of the outside air inlet 54, the rotating lid 58a opens the circulation duct 79. In the discharge part duct 67, the dry air discharged from the inner body 4 is blown by the exhaust blower 68.

The exhaust blower 68 is formed by a blower fan 73 disposed in the blower duct 71 and a blower motor 87 that rotationally drives the blower fan 73. The blower motor 87 is provided so as to protrude outward from the blower duct 71 and rotationally drives the blower fan 73 in the blower duct 71. The blower fan 73 is driven to rotate and sucks in dry air after being blown to the object to be dried from the dry air discharge port 22 of the outer body part 3 through the exhaust duct 24 from the inside of the outer body part 3. Then, the drying air after being blown onto the object to be dried 10 is blown into the discharge duct 67. Further, by sucking dry air after being blown from the outer body portion 3 to the object to be dried 10 from the outer body portion 3, the outside air is supplied from the outside air inlet 54 through the drying air inlet 23 and the drying air supply duct 25. Is sucked.
[Exhaust heat circulation section]

As shown in FIGS. 12 and 13, the exhaust heat circulation section 94 includes circulation ports 78, 78, 78, 78 provided in the discharge section duct 67, a circulation duct 79, a rotating lid 58 a, an opening / closing lid 80, 81. The drying air after being blown by the exhaust blower 68 against the material to be dried blown into the discharge duct 67 is controlled by controlling the rotation angle of the exhaust damper 69 and the intake damper 55, that is, the opening / closing angle. Is sent into the circulation duct 79 through the circulation port 78 and is heated again by the heater 56 from the outside air inlet 54 and circulated. In the circulation of the drying air, the control unit 12 sets the opening / closing angles of the exhaust damper 69 and the intake damper 55 according to the state at the time of drying driving, thereby performing a drying operation with favorable drying conditions and high thermal efficiency. be able to.
[Control unit 12]

  Further, the flow rate adjusting valve 97 for adjusting the flow rate of the high-temperature steam supplied to the heater 56, the intake damper 55, the exhaust damper 69, the motor 48, and the blower motor 87 are connected to the control unit 12 and set by the control unit 12. It is controlled according to the drying conditions and the drying procedure.

  As shown in FIG. 15, the control unit 12 includes an input unit 88, an output unit 89, a first storage unit 90, a second storage unit 91, and a drying condition setting unit 92. A flow rate adjusting valve 97, an intake damper 55, an exhaust damper 69, a motor 48, and an exhaust blower 68 are connected to the output unit 89. An intake temperature sensor 93, an exhaust temperature sensor 95, and an exhaust humidity sensor are connected to the input unit 88. 96 is connected. As shown in FIG. 1, the intake air temperature sensor 93 is disposed inside the dryer housing 2 and at the upper portion of the axially intermediate portion of the outer trunk portion 3. The exhaust temperature sensor 95 is disposed outside the exhaust / circulation duct 72 as shown in FIG. The exhaust humidity sensor 96 is disposed outside the exhaust / circulation duct 72 as shown in FIG.

  The intake air temperature sensor 93 detects the temperature of the outside air introduced into the supply unit 52 from the outside air inlet 54 and inputs the detection result to the control unit 12. The exhaust temperature sensor 95 detects the temperature of the exhausted and dried air blown to the object to be dried 10 in the inner body 4 and discharged from the drying air outlet 22 of the outer body 3, and the result is input to the control unit 12. To do. The exhaust humidity sensor 96 is disposed in the vicinity of the exhaust temperature sensor 95, detects the humidity of the exhaust drying air, and inputs this result to the control unit 12.

  The drying condition setting unit 92 of the control unit 12 controls the intake damper 55, the exhaust damper 69, the exhaust blower 68, and the motor 48 that rotates the inner body 4, and simultaneously controls the flow rate adjustment valve 97. The procedure will be described with reference to the flowchart of the flow rate adjusting valve 97 shown in FIG.

  In step S3 of the flowchart of FIG. 16, after the flow rate adjustment valve 97 is fully opened, in step S4, the drying condition setting unit 92 of the control unit 12 determines that the exhaust temperature of the drying air discharged from the inner body 4 is the first. It is determined whether or not the temperature is higher than 1. If the temperature has not reached the first temperature, the drying condition setting unit 92 of the control unit 12 opens the flow rate adjustment valve 97 in step S3. When the exhaust gas temperature becomes higher than the first predetermined temperature in step S4, the drying condition setting unit 92 of the control unit 12 throttles the flow rate adjustment valve 97 from the fully opened state in step S5, and supplies steam to the heater 56. Reduce. As a result, the temperature of the heater 56 begins to drop.

  Next, the drying condition setting unit 92 of the control unit 12 determines whether or not the temperature of the discharged drying air is lower than the second temperature lower than the first temperature in step S6. If the drying condition setting unit 92 of the control unit 12 determines that the temperature of the discharged dry air is not lower than the second temperature in step S6, that is, if it is higher than the second temperature, step S5 is executed and the flow rate adjusting valve 97 is executed. Is squeezed. When the drying condition setting unit 92 of the control unit 12 determines that the exhaust temperature has become lower than the second temperature in step S6, the flow rate adjustment valve 97 is opened in step S7, and the amount of steam supplied to the heater 56 is increased. Increase the exhaust temperature.

  Next, the drying condition setting unit 92 of the control unit 12 determines whether or not the operation of the dryer 1 is finished in step S8, that is, whether or not the operation of the dryer 1 is finished, and the drying is finished. If not, step S4 and subsequent steps are repeatedly executed. During the operation of the dryer 1, the drying condition setting unit 92 of the control unit 12 determines the amount of steam supplied to the heater 56, and the temperature of the drying air discharged from the inner body 4 is the first temperature and the second temperature. The flow rate adjustment valve 97 is throttled or opened so as to be maintained in between. When the drying condition setting unit 92 of the control unit 12 that has finished the operation of the dryer 1 determines in step S8, the flow rate adjusting valve 97 is fully closed to stop the supply of steam to the heater 56.

  As described above, according to the present embodiment, when the dry air blown in the inner body 4 is again generated and circulated with the outside air, the intake damper and the exhaust damper are opened and closed. Since the air volume of the outside air to be taken in and the air volume of the drying air to be circulated are set, variation in the temperature of the generated drying air can be suppressed.

  Although the embodiments of the present invention have been disclosed as described above, it is obvious that those skilled in the art can make changes without departing from the scope of the present invention. All such modifications and equivalents are intended to be included in the following claims.

  The dryer according to the present invention was washed by a linen product such as a sheet, a pillow cover, a towel, a commercial dryer that dries the laundry washed such as a mop and a mat, and a continuous washing machine that performs continuous washing. It can be used for a dryer for drying laundry.

DESCRIPTION OF SYMBOLS 1 Dryer 2 Dryer housing | casing 3 Outer body part 4 Inner body 5 Rotation drive mechanism 6 Drying air supply / discharge part 12 Control part 52 Supply part 53 Discharge part 54 Outside air intake 55 Intake damper 56 Heater 67 Exhaust part duct 68 Exhaust Blower 69 Exhaust damper 94 Waste heat circulation section

Claims (3)

An outer trunk provided in the dryer case;
An inner body in which an object to be dried is thrown into and supported rotatably inside the outer body part,
A rotational drive mechanism for rotationally driving the inner trunk within the outer trunk;
A drying air supply / discharge unit that supplies dry air that has been taken in outside air and heated into the outer body portion and discharges the drying air in the outer body portion outwardly,
The dry air supply / discharge unit takes in outside air, heats it to generate dry air, supplies it to the inner body, and discharges the dry air after drying the object to be dried in the inner body from the inner body. Formed with a discharge part,
The supply unit is formed of an outside air intake provided in the dryer casing, an intake damper that adjusts an air volume taken in from the outside air intake, and a heater that heats the outside air taken in from the outside air intake,
The discharge unit discharges the dry air in the inner body, a discharge duct that sucks the dry air in the inner body and discharges it into the discharge unit duct, and discharges it into the discharge unit duct It is formed with an exhaust damper that adjusts the amount of dry air discharged to the outside,
Between the supply part and the discharge part, at least a part of the drying air after being blown to the object to be dried in the inner body was introduced into the supply part, and was blown to the object to be dried in the inner body. Provide an exhaust heat circulation part that circulates at least a part of the drying air after,
The exhaust heat circulation part is formed by a circulation duct that communicates the exhaust part duct and the outside air inlet side, and a circulation port that is provided in the exhaust part duct and opens toward the circulation duct,
When the intake damper fully opens the outside air intake and the exhaust damper fully opens the exhaust duct, there is no circulation of the dry air in the exhaust duct to the outside air intake side, and the intake damper When the inlet is in a fully closed state and the exhaust damper is in a fully closed state of the exhaust duct, the dry air in the exhaust duct is introduced to the outside air intake side and blown to the object to be dried in the inner trunk A drying air is circulated, and the drying air circulation ratio is set by the opening / closing operation of the outside intake port of the intake damper and the opening / closing operation of the discharge duct of the exhaust damper. In order to reduce the circulation ratio of circulating the drying air after being blown to the material to be dried in the inner body into the supply unit, the opening angle for opening the outside air intake port of the intake damper is set large. And setting a large opening angle for opening the exhaust duct of the exhaust damper,
In the case of increasing the circulation ratio, a control unit is provided that sets a small opening angle for opening the outside air intake port of the intake damper and sets a small opening angle for opening the exhaust duct of the exhaust damper. The dryer according to claim 1, wherein The opening on the supply part side of the circulation duct is opened and closed by the intake damper, and when the outside air intake port is fully opened, the intake damper opens the supply duct side of the circulation duct in a fully closed state. The dryer according to claim 1 or 2, characterized by the above.

Images