JP2007105373A - Clothes drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clothes drying machine, in which heated air can be smoothly fed into a drum even in a case where bulkiness of clothes is increased as drying proceeds so as to improve clothes drying efficiency, and restrict drying irregularity. <P>SOLUTION: A circular member 45 is provided on a circumferential surface of the drum 4 to partision the inside of a drying chamber to an inlet chamber 3a and an outlet chamber 3b, and vent holes 44 are formed in a recess 42 in a back surface as well as in the circumferential surface of the drum 4. In drying operation, rotation speed of the drum 4 is increased in the second half of a clothes drying process than in the first half. Centrifugal force added to the clothes is thus increased when they are bulkier, and the clothes are biased toward the inside of the circumferential surface of the drum 4, leaving large space around the axis, and facilitating penetration of heated air through the vent holes 44 in the recess 42 into the drum 4. Heated air can thus be sufficiently fed into the drum even after the clothes become bulky, thereby promoting drying. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drum-type clothes dryer, and more particularly to a clothes dryer suitable for use at a cleaning site.

  For business use in a cleaning store or the like, for example, a drum-type clothes dryer configured as described in Patent Document 1 is used. That is, in this type of clothes dryer, air heated by a heat source such as a steam radiator is fed into a drying chamber equipped with a drum that is rotatable about a horizontal axis, and heat exchange with wet clothes is performed in the drum. Remove the humid air from the drying chamber and discharge it through the lint filter. A heated air outlet into the drying chamber is provided above the rear of the drying chamber, and a suction port for wet air from the drying chamber is below the front of the drying chamber, which is separated from the outlet in the axial direction of the drum. Is provided. Thereby, the heated air sent into the drying chamber from the blowout port flows into the drum from the air holes perforated on the drum peripheral surface and easily passes through the drum.

  Furthermore, in the clothes dryer described in Patent Document 1, in order to promote the inflow of heated air into the drum as described above, between the air outlet and the inlet in the axial direction of the drum in the drying chamber, A partition wall is provided so as to narrow the gap between the outer peripheral surface of the drum and the drying chamber, thereby restricting the flow of air passing outside the drum at the front and rear portions of the drying chamber. Heated air easily passes inside.

  However, the conventional clothes dryer has the following problems. In business applications, in order to process a large amount of clothing, an amount of clothing close to the rated capacity is almost always put in the drum. Since the clothes in the drum are in a wet state at the beginning of the drying operation, the bulk is small, and since there is a lot of space in the drum, the clothes move as the drum rotates. Specifically, the clothes are lifted as the drum rotates by the baffles provided in the drum, and the movement is repeated when the clothes are lifted to a certain extent. The clothing is generally gathered on the bottom side of the drum, and the upper space in the drum is vacant. Therefore, the heated air discharged from the blower outlet in the upper part of the drying chamber easily flows into the drum through the vent hole located at the upper side as it rotates.

  However, as drying progresses, each garment in the drum swells and becomes bulky. For this reason, the space in the drum becomes narrow and the clothes are difficult to move, and the upper space in the drum is occupied by the swelled clothes. As a result, the air holes formed in the drum peripheral surface over the entire periphery are closed with clothing, resulting in poor air permeability through the air holes. That is, the flow resistance of air in the drum increases rapidly, and it becomes difficult for heated air to enter the drum. For this reason, poor drying of clothes or uneven drying easily occur. In order to resolve these problems, it is necessary to consider the amount of clothing that is put in first so that sufficient space can be secured in the drum even if the clothing dries out and swells. There is a problem that it ends up.

JP 2002-35491 A (FIG. 1 and stages 0019 to 0021)

  The present invention has been made to solve the above-described problems, and the main object of the present invention is to allow heated air to be smoothly fed into a drum even when drying progresses and the bulk of clothing increases. Accordingly, it is an object of the present invention to provide a clothes dryer capable of improving the drying efficiency of clothes and suppressing uneven drying.

The first invention made to solve the above-mentioned problems is rotatable around a horizontal or inclined axis, and has a substantially cylindrical shape with a garment input opening at one end face and is dry inside. A drum for storing the clothing of interest; a drying chamber in which the drum is installed; an air intake passage for sending air into the drying chamber from an outlet opening toward the drying chamber; and the blowing chamber facing the drying chamber An exhaust passage for exhausting air in the drying chamber from a suction port provided at a position relatively closer to an end surface side where a clothing input opening is formed in the axial direction of the drum than the outlet; and in the intake passage or An air flow generating means for generating an air flow passing through the intake path, the drying chamber and the exhaust path in any one of the exhaust paths, and a heating means for heating the air in the intake path,
In the axial direction of the drum, there is provided air blocking means so that a gap between the outer peripheral surface of the drum and the inner surface of the drying chamber is narrowed between the blower outlet and the suction port. The vent hole is formed in the center side.

The second invention made to solve the above-mentioned problems is rotatable around a horizontal or inclined axis, and has a substantially cylindrical shape with a garment input opening at one end face and is dried inside. A drum for storing the clothing of interest; a drying chamber in which the drum is installed; an air intake passage for sending air into the drying chamber from an outlet opening toward the drying chamber; and the blowing chamber facing the drying chamber An exhaust passage for exhausting air in the drying chamber from a suction port provided at a position relatively closer to an end surface side where a clothing input opening is formed in the axial direction of the drum than the outlet; and in the intake passage or An air flow generating means for generating an air flow passing through the intake path, the drying chamber and the exhaust path in any one of the exhaust paths, and a heating means for heating the air in the intake path,
Ventilation preventing means is provided in the axial direction of the drum so that a gap between the outer peripheral surface of the drum and the inner surface of the drying chamber is narrowed between the blower outlet and the suction opening, and is separated by the ventilation obstruction means. Further, an air passage having an opening facing the drying chamber on the air outlet side and an opening facing the inside of the drum on the suction port side is provided on the inner surface of the drum.

The third invention made to solve the above-mentioned problems is rotatable around a horizontal or inclined axis, and has a substantially cylindrical shape with a garment input opening at one end face and is dry inside. A drum for storing the clothing of interest; a drying chamber in which the drum is installed; an air intake passage for sending air into the drying chamber from an outlet opening toward the drying chamber; and the blowing chamber facing the drying chamber An exhaust passage for exhausting air in the drying chamber from a suction port provided at a position relatively closer to an end surface side where a clothing input opening is formed in the axial direction of the drum than the outlet; and in the intake passage or An air flow generating means for generating an air flow passing through the intake path, the drying chamber and the exhaust path in any one of the exhaust paths, and a heating means for heating the air in the intake path,
Ventilation preventing means is provided in the axial direction of the drum so that a gap between the outer peripheral surface of the drum and the inner surface of the drying chamber is narrowed between the air outlet and the suction port. A vent hole is formed in the entire circumference of the peripheral surface on the outlet side separated by the blocking means, and a vent hole is formed only in a partial range in the circumferential direction of the peripheral surface on the suction port side.

A fourth invention made to solve the above-mentioned problems is rotatable around a horizontal or inclined axis, and has a substantially cylindrical shape with a clothing input opening at one end face and is dry inside. A drum for storing the clothing of interest; a drying chamber in which the drum is installed; an air intake passage for sending air into the drying chamber from an outlet opening toward the drying chamber; and the blowing chamber facing the drying chamber An exhaust passage for exhausting air in the drying chamber from a suction port provided at a position relatively closer to an end surface side where a clothing input opening is formed in the axial direction of the drum than the outlet; and in the intake passage or An air flow generating means for generating an air flow passing through the intake path, the drying chamber and the exhaust path in any one of the exhaust paths, and a heating means for heating the air in the intake path,
The suction port is provided on the bottom side of the drying chamber, and the gap between the outer peripheral surface of the drum and the surface of the drying chamber is narrowed between the air outlet and the suction port in the axial direction of the drum. Ventilation preventing means partially cut off on the bottom side is provided on the inner surface of the drying chamber.

  In the clothes dryer according to the first to fourth aspects of the present invention, the structure of the air circulation path is an exhaust type structure in which both the inlet of the intake passage and the outlet of the exhaust passage are open to the outside, and the inlet and exhaust of the intake passage. Either a circulation type structure in which a dehumidifier is provided in the exhaust path connected to the outlet of the path, or a combination of both may be used.

  In the clothes dryer according to the first aspect of the invention, the vent hole is perforated not only on the peripheral surface of the drum but also on the central side of the closed side end surface of the drum opposite to the end surface provided with the clothing input opening. As the drying of the clothing progresses, the clothing swells and increases in volume as described above, but the centrifugal force associated with the drum rotation acts on the clothing present in the drum, and the centrifugal force is at the center of the drum. The greater the distance from (axis), the greater. Therefore, even when the drum is rotated at a relatively low speed to stir the clothes, a space is easily formed in the vicinity of the drum axis.

  According to the clothes dryer according to the first aspect of the present invention, the air hole on the center side of the drum closing side end surface is not damaged even when the air drying hole on the drum peripheral surface is blocked by the garment that has been dried. Since it is difficult to block, heated air can flow into the drum from the vent hole. Thereby, even if clothing drying progresses and each clothing swells, heated air can be applied to the clothing in the drum, and the clothing can be dried well and the occurrence of uneven drying can be reduced.

  In the clothes dryer according to the first aspect of the present invention, preferably, it is configured to include a control means for controlling the driving source of the drum so as to increase the rotation speed of the drum in the latter half period of the drying operation as compared with the first half period. Good.

  According to this configuration, when the clothes are dried and the bulk thereof is increased, the rotational speed of the drum is increased, and the centrifugal force acting on each piece of clothes in the drum is increased. As a result, each garment tends to be displaced toward the inner peripheral surface of the drum, and the space near the drum shaft is easily vacant. As a result, it becomes easier for heated air to flow into the drum from the air hole on the center side of the drum closing side end surface, and it is possible to further promote good drying of clothes and prevention of uneven drying.

  Further, in the clothes dryer according to the second aspect of the invention, in addition to the air holes provided in the peripheral surface of the drum, the air dryer can be used directly from the outside of the drum (drying chamber) using an air passage disposed on the inner surface of the drum. In the drum, the heated air can be supplied to the side closer to the suction port than the air-permeation means. Heated air supplied from the air outlet into the drying chamber flows into the drum through the vents, but in general, dry heating is applied even to clothing located on the side far from the air outlet, that is, on the side close to the air inlet. Air is hard to reach. On the other hand, according to the clothes dryer according to the second aspect of the invention, the heated air that has not yet exchanged heat with the clothes passes through the ventilation path to the clothes positioned on the far side from the outlet in the drum. Even if the drying of the clothes progresses and each clothing swells, the occurrence of uneven drying can be reduced.

  In the clothes dryer according to the second aspect of the present invention, if the air passage is formed using a baffle protruding in the drum, there is no need to separately provide a member for forming the air passage, The space inside the drum is not narrowed.

  In the clothes dryer according to the third aspect of the invention, the air hole is formed in the entire circumference of the drum circumferential surface on the side closer to the air outlet than the air flow obstructing means, but on the side near the suction port, the circumferential direction of the drum circumferential surface The vent is formed only in a part of the area. Therefore, the outlet of the humid air from the drum moves on the circumference as the drum rotates. As a result, heated air tends to stay in the drum and heat exchange efficiency with wet (wet) clothing can be increased, and a spiral air flow can be generated in the drum to cause clothing in the drum. Heated air can be easily distributed. Therefore, according to the clothes dryer which concerns on 3rd invention, even if clothing drying progresses and each clothing swells, it can dry clothing well and can reduce generation | occurrence | production of drying unevenness.

  In the clothes dryer according to the fourth aspect of the invention, the air flow blocking means does not narrow the gap between the outer periphery of the drum and the inner surface of the drying chamber over the entire periphery of the drum, but instead of the bottom of the drying chamber provided with the suction port. The part is intentionally missing. Therefore, heated air flows from the outlet side to the inlet side through the missing part. Garbage such as lint and dust comes out from the clothes as it dries, but the dust that comes out at the outlet exits smoothly through the airflow passing through the above-mentioned missing part and flows into the inlet side quickly and sucks in quickly. It is discharged from the mouth to the exhaust passage. Note that if a lint filter is provided in the exhaust passage, dust is collected by the lint filter. Therefore, according to the clothes dryer according to the fourth aspect of the present invention, as described above, while improving the drying efficiency of the clothes and reducing the unevenness of drying, it is possible to prevent dust such as lint from the clothes from accumulating in the ventilation obstruction means. can do.

[First embodiment]
An embodiment (first embodiment) of a clothes dryer according to the first invention will be described with reference to FIGS. FIG. 1 is a schematic side sectional view of a clothes dryer according to the present embodiment, FIG. 2 is a schematic front sectional view of the clothes dryer, and FIG. 3 is a diagram for explaining the characteristic operation of the clothes dryer according to the present embodiment. FIG. 4 is an electric system configuration diagram of the main part of the clothes dryer of this embodiment, and FIG. 5 is a diagram for explaining characteristic control of the clothes dryer of this embodiment.

  Inside the substantially cylindrical drying chamber 3 formed substantially at the center of the casing 1 that forms the outer shape of the clothes dryer, a cylindrical cylindrical surface that is cantilevered by a main shaft 5 that extends substantially in the front-rear direction. The drum 4 is arranged. The drum 4 is provided with a large opening as a clothing input port 41 on the front end surface thereof, and the clothing is input into the drum 4 from the clothing input port 41 by opening the door 2 on the front surface of the housing 1. The main shaft 5 is rotatably supported by a bearing 6 provided on the rear wall of the housing 1, and a large pulley 7 is attached to the tip of the main shaft 5 protruding rearward from the bearing 6. The rotational driving force of a drum motor 8 as a driving source installed behind the housing 1 is transmitted to the large pulley 7 via the motor pulley 9 and the timing belt 10, whereby the drum 4 is rotationally driven around the main shaft 5. The Needless to say, it is possible to appropriately change the drive system such as adopting the direct drive system.

  An air outlet 11 is provided on the upper surface of the rear part of the drying chamber 3, and an air intake passage 12 is provided at the upper part of the drying chamber 3, with an air inlet 13 opened rearward and the air outlet 11 as an outlet. Is provided with a heating source 14 as air heating means for heating the air taken in from the intake port 13. In the case of a commercial clothes dryer, the heating source 14 is often a steam radiator through which high-temperature steam is circulated. However, the heating method is not limited to this, and a gas heater using an electric heater, city gas, or LP gas is used. Etc. may be used.

  A suction port 15 is disposed on the lower surface of the front portion of the drying chamber 3 that is located away from the air outlet 11 in the axial direction of the drum 4 (in this example, the front-rear direction). An exhaust passage 16 is formed with an outlet 15 being an outlet and an outlet 17 opened rearward. A lint filter 18 and a blower 19 that is rotationally driven by a blower motor 20 are installed in the exhaust passage 16 to collect lint and the like from clothes. Thus, when the blower 19 is driven to rotate in a predetermined direction by the blower motor 20, the outside air is sucked into the intake passage 12 from the intake port 13, and the intake passage 12 → the outlet 11 → the drying chamber 3 → the intake port 15 → the exhaust. An air flow that passes through the path 16 and is discharged from the exhaust port 17 to the outside is generated. That is, the blower 10 and the blower motor 19 correspond to the air flow generating means in the present invention. If the heating source 14 is operating at that time, the air supplied from the blower outlet 11 to the drying chamber 3 becomes heated air.

  A large number of small ventilation holes 43 a and 43 b are formed in the cylindrical peripheral surface of the drum 4. In FIG. 1, a vent hole facing the inlet chamber 3a described later is denoted by reference numeral 43a, and a vent hole facing the outlet chamber 3b is denoted by numeral 43b. An annular body 45 is attached to the outer peripheral surface of the drum 4 in the vicinity of the center in the axial direction, so that a gap between the inner surface of the drying chamber 3 and the outer peripheral surface of the drum 4 is separated from the inlet chamber 3a on the outlet 11 side. It is partitioned into an outlet chamber 3b on the suction port 15 side. In other words, the annular body 45 is a member for restricting the direct air flow from the inlet chamber 3a to the outlet chamber 3b, and corresponds to the air flow blocking means in the present invention. When the drum 4 is stationary, there is a narrow gap between the outer peripheral edge of the annular body 45 and the inner wall of the drying chamber 3, but when the drum 4 or the drying chamber 3 vibrates, the annular body 45 is placed on the inner wall of the drying chamber 3. There is a risk of contact. Therefore, the annular body 45 may be formed of a material having a certain degree of elasticity and excellent wear resistance. For example, silicone or the like can be used.

  As a characteristic configuration of the clothes dryer, the closed end surface of the drum 4 facing rearward is a concave portion 42 recessed inward of the drum 4 near the center side, that is, near the attachment portion of the main shaft 5. Also, a large number of vent holes 44 are formed. That is, in this clothes dryer, vent holes are formed not only on the peripheral surface of the drum 4 but also on the closed end surface facing the inlet chamber 3a.

  With the above configuration, the air that has flowed into the drying chamber 3 from the outlet 11 as described above flows into the drum 4 through the vent holes 43a that are formed in the peripheral surface of the drum 4 so as to face the inlet chamber 3a. , A part of the drum 4 moves behind the closed end surface of the drum 4 and flows into the drum 4 from the vent hole 44. The inside of the drum 4 proceeds from the rear to the front as a whole, and faces the outlet chamber 3b through the vent hole 43b formed in the peripheral surface of the drum 4, that is, the outer periphery of the drum 4 and the inner surface of the drying chamber 3 And is sent to the exhaust passage 16 through the suction port 15. Due to the restriction of the air flow by the annular body 45, the amount of air that can flow from the inlet chamber 3 a to the outlet chamber 3 b without passing through the drum 4 is small, and the heated air is efficiently supplied to the clothes accommodated in the drum 4. You can guess.

  As shown in FIG. 4, in the clothes dryer of the present embodiment, a control unit 50 including a CPU or the like is installed at the center of control, a key input signal from the operation unit 52, a door 2 opening / closing detection signal by the door switch 54. For example, a temperature detection signal of a temperature sensor 55 that detects the outlet temperature of the drum 4 installed at the inlet of the exhaust passage 16 is input to the controller 50. The control unit 50 includes a storage element such as a ROM in which a control program is stored in advance. The control program is executed by the CPU while receiving each input signal as described above, whereby the drum motor 8 is connected via the load driving unit 51. The blower motor 20 and the heating source 14 are controlled. When the heating source 14 is a steam radiator, the heating capacity can be controlled by adjusting the opening of a valve that supplies high-temperature steam to the radiator. The control unit 50 thus performs a drying operation as described later.

  Next, in the clothes dryer of the present embodiment, a characteristic operation on the operation executed under the control of the control unit 50 will be described.

  For example, the worker puts clothes that have been washed in another washing machine into the drum 4 from the clothes insertion port 41, closes the door 2, and performs a predetermined operation using the operation unit 52. The control unit 50 receives this operation and starts operation after confirming that the door 2 is closed by the door switch 54. As the operation starts, the drum motor 8 and the blower motor 20 are driven, and high-temperature steam is supplied to the steam radiator that is the heating source 14. The blower 19 is rotationally driven by the blower motor 20 and the heating source 14 heats the air, whereby the heating air is supplied to the drying chamber 3 as described above.

  In the first half of the drying operation, the drum motor 8 is driven at a rotational speed such that the centrifugal force acting on the clothes accommodated in the drum 4 is about 0.8G. Thereby, the clothes in the drum 4 are agitated. In the first half of the drying operation, since the clothes housed in the drum 4 suck in water (or solvent), the bulk of each piece of clothes is small. Therefore, as shown in FIG. 3A, a sufficient space for moving clothes is secured in the drum 4, and in particular, the upper space in the drum 4 is vacant. Therefore, the heated air sent from the blower outlet 11 to the drying chamber 3 (inlet chamber 3a) smoothly flows into the drum 4 from the vent hole 43a on the peripheral surface of the drum 4, and this heated air moves backward in the drum 4. Proceeding from the side to the front, the water vapor is evaporated from the clothing by sufficiently exchanging heat with the clothing. Such moist air containing a large amount of water vapor is in the front part of the drying chamber 3 and exits to the outside of the drum 4 through the vent hole 43b and travels from the suction port 15 to the exhaust passage 16. In this way, in the first half of the drying operation, that is, in a state where the clothes are still sufficiently wet, the heated air surely passes through the drum 4 in the drying chamber 3, so that the drying of the clothes proceeds efficiently.

  Until the clothes are dried to some extent, the drum outlet temperature detected by the temperature sensor 55 remains at a slow rise as shown in FIG. This is because the amount of heat of the heated air is almost used to evaporate the water vapor contained in the clothing, so that the temperature of the air itself hardly increases. Then, when the garment is dried to some extent, the amount of heat used for heat exchange with the garment in the drum 4 decreases, so the degree of increase in the drum outlet temperature becomes abrupt. On the other hand, when drying progresses in this way, each garment swells in the drum 4 to increase its bulk, and the empty space in the drum 4 is reduced. Therefore, each garment comes into contact with the inner peripheral surface of the drum 4, and the garment blocks the vent hole 43a, so that the flow of heated air is deteriorated.

  Under such circumstances, when the drum outlet temperature detected by the temperature sensor 55 reaches the preset upper limit temperature T1, the control unit 50 controls the heating source 14 to suppress heating. Specifically, the opening degree of the valve is adjusted so as to reduce the flow rate of high-temperature steam supplied to the steam radiator. Thereafter, the control unit 50 adjusts the heating capability of the heating source 14 so that the drum outlet temperature does not greatly exceed the upper limit temperature T1 and falls within a predetermined temperature range. At the same time, the control unit 50 controls the drum motor 8 to increase the rotational speed of the drum 4 when the drum outlet temperature reaches the upper limit temperature T1. Specifically, the rotational speed is increased so that the centrifugal force acting on the clothes on the drum 4 increases from 0.8G to 1.0G. For example, when the inner diameter of the drum 4 is 650 mm, the rotation speed is increased from about 47 rpm to about 53 rpm.

  As described above, as the garment is dried, each garment swells and the space in the drum 4 is reduced. However, when the rotation speed of the drum 4 is increased, the centrifugal force acting on each garment increases, and FIG. As shown in (b), the clothes in the drum 4 are generally displaced in the direction approaching the inner peripheral surface from the center side of the drum 4. As a result, a space is created on the center side of the drum 4, that is, around the shaft, and the vent hole 43a on the peripheral surface of the drum 4 is blocked by clothing, but the vent hole 44 of the recess 42 on the rear surface is not blocked by clothing. Heated air flows smoothly into the drum 4 through the air holes 44. Therefore, even if the clothing swells in the second half of the drying operation, the heated air can be smoothly fed into the drum 4 to promote the drying of the clothing. For example, when a predetermined operation time has elapsed, the control unit 50 stops the drum motor 8 and the blower motor 20 and ends the operation. Of course, it is natural that a cooling operation for lowering the temperature of the clothes may be performed.

[Second Embodiment]
Next, an embodiment (second embodiment) of a clothes dryer according to the second invention will be described with reference to FIGS. FIG. 6 is a schematic side sectional view of the clothes dryer of the present embodiment, and FIG. 7 is a partially cutaway perspective view of the drum 4 of the clothes dryer. The same components as those of the clothes dryer of the first embodiment already described are denoted by the same reference numerals and description thereof is omitted. This is the same in the following embodiments.

  A baffle 46 for promoting the agitation of clothing is disposed on the inner peripheral surface of the drum 4 with an interval of 120 °. In the clothes dryer of the second embodiment, the baffle 46 removes heated air from the drum 4. Used to guide in. That is, as shown in FIGS. 6 and 7, the inside of the baffle 46 is hollow, and a large opening 47 is formed in the circumferential surface of the drum 4 so as to face the inlet chamber 3 a in the drying chamber 3. A large number of vent holes 48 are formed in the wall surface of the baffle 46 on the 3b side. As a result, the cavity inside the baffle 46 is a ventilation path 49 having the opening 47 as an inlet and the vent 48 as an outlet.

  Since the drum 4 is rotated at a predetermined speed during the drying operation as described above, the opening 47 periodically arrives at a position facing the air outlet 11, and at other times, the vent hole 43 a is located at a position facing the air outlet 11. There is a circumferential surface of the drum 4 in which is drilled. Therefore, although the heated air sent from the blower outlet 11 to the drying chamber 3 (the inlet chamber 3a) flows sideways and rearward along the peripheral surface of the drum 4, the opening 47 arrives at a position facing the blower outlet 11. In this case, most of the heated air flows into the air passage 49 through the opening 47 and is supplied into the drum 4 from the air hole 48. On the other hand, when there is a drum 4 peripheral surface with a vent hole 43a formed at a position facing the air outlet 11, most of the heated air is supplied into the drum 4 through the vent hole 43a.

  That is, as the drum 4 rotates, a period in which heated air is directly supplied to the inside of the drum 4 located on the inlet chamber 3a side, and a period in which the heated air is supplied directly to the inside of the drum 4 located on the outlet chamber 3b side. Occur alternately. If heated air is simply supplied into the drum 4 through the vent hole 43a on the peripheral surface of the drum 4, dry heated air is difficult to hit the clothes inside the drum 4 located on the outlet chamber 3b side. In the example clothes dryer, there is a period in which the heated air is directly supplied to the inside of the drum 4 located on the outlet chamber 3b side as described above, so that the heated air is spread over the entire clothes in the drum 4. This can reduce uneven drying.

[Third embodiment]
Next, an embodiment (third embodiment) of a clothes dryer according to the third invention will be described with reference to FIG. FIG. 8 is a perspective view of a drum in the clothes dryer of this embodiment. The clothes dryer of the third embodiment is obtained by replacing the drum shown in FIG. 7 with the one shown in FIG. 8 in the clothes dryer of the second embodiment.

  The structural feature of the clothes dryer according to the third aspect of the invention is that the air holes 43a are uniformly bored in the entire circumference on the rear side of the annular body 45 on the peripheral surface of the drum 4, The vent hole 43b is formed only in a partial range indicated by the symbol P in the circumferential direction on the front side of the annular body 45. In the inlet chamber 3a, the conditions under which the heated air discharged from the outlet 11 passes through the vent hole 43a are the same regardless of the rotation position of the drum 4. However, in the outlet chamber 3b, the vent hole 43b is formed along with the rotation of the drum 4. Since the existing position rotates, the condition that the air that has passed through the drum 4 passes through the vent hole 43b changes as the drum 4 rotates.

  Specifically, when the vent hole 3b comes to the position facing the suction port 15, that is, the bottom side of the drying chamber 3, the flow resistance of the air passing through the vent hole 3b becomes relatively small and the air passing through the drum 4 The distribution volume of will increase. Therefore, as the drum 4 rotates, the amount of air that flows out from the inside of the drum 4 increases and decreases. Further, since the position where the air exits from the drum 4 rotates as the drum 4 rotates, formation of a spiral air flow in the same direction as the rotation of the drum 4 is promoted in the drum 4.

  In general, if the direction and speed of the heated air flow in the drum 4 are constant, the heated air tends not to be sufficiently applied to some clothing, and dryness and uneven drying are likely to occur. On the other hand, in the clothes dryer of the third embodiment, the direction and speed of the heated air passing through the drum 4 periodically change as described above. As a result, the heated air easily reaches the clothes in the drum 4, and drying unevenness can be reduced. Further, heat exchange is promoted when the heated air stays in the drum 4, and if the flow of the heated air becomes faster thereafter, the water vapor evaporated from the clothes due to the heat exchange is carried away all at once, so that the drying efficiency is generally improved. .

[Fourth embodiment]
Next, an embodiment (fourth embodiment) of a clothes dryer according to the fourth invention will be described with reference to FIGS. FIG. 9 is a schematic side longitudinal sectional view of the clothes dryer of the present embodiment, and FIG. 10 is a schematic front longitudinal sectional view of the clothes dryer. The clothes dryer according to the fourth embodiment has basically the same configuration as the clothes dryer according to the first embodiment, but in the first embodiment, as the airflow obstructing means attached to the peripheral surface of the drum 4. A member corresponding to the annular body 45 is provided on the inner surface of the drying chamber 3 as a partition wall 3c. The partition wall 3 c, like the annular body 45, partitions the inside of the drying chamber 3 into an inlet chamber 3 a and an outlet chamber 3 b, but has a structure in which a lower side thereof, that is, a portion corresponding to the suction port 15 is missing. Yes.

  As described above, since a part of the partition wall 3c is lost, the heated air supplied from the outlet 11 to the inlet chamber 3a generally flows into the drum 4 through the vent holes 43a and 44. Flows directly into the outlet chamber 3b through the missing part of the partition wall 3c. Garbage such as lint and dust comes out of the clothes in the drum 4 during the drying operation. Such garbage often accumulates near the bottom of the drying chamber 3, but in the clothes dryer of the fourth embodiment, as described above, the bottom of the drying chamber 3 faces the outlet chamber 3b from the inlet chamber 3a side to the outlet chamber. Since an air flow is formed in 3b as it goes from the suction port 15 into the exhaust passage 16, dust can be discharged from the drying chamber 3 in this air flow. Thereby, it is possible to prevent dust such as yarn waste from accumulating on the outside of the drum 4 on the inlet chamber 3a side.

  The first to fourth embodiments are merely examples, and it is obvious that modifications, corrections, and additions are appropriately included in the scope of the present application within the scope of the present invention. For example, in the above-described embodiments, both the intake port 13 and the exhaust port 17 are of the exhaust type configuration opened to the outside, but the outlet of the exhaust passage 16 is connected to the inlet of the intake passage 12, and the intake passage 12 → A circulation path such as a drying chamber 3 → exhaust passage 16 → intake passage 12 →... Is circulated, and a dehumidifier for condensing and liquefying water vapor in the humid air is provided in the exhaust passage 16. It is obvious that the present invention can be applied to a clothes dryer having a configuration. Of course, the clothes dryer of the structure which circulates air fundamentally using some outside air may be used.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic side surface longitudinal cross-sectional view of the clothes dryer which is one Example (1st Example) of 1st invention. The schematic front longitudinal cross-sectional view of the clothes dryer of 1st Example. The schematic diagram for demonstrating the characteristic operation | movement in the clothes dryer of 1st Example. The electric system block diagram of the principal part of the clothes dryer of 1st Example. The figure for demonstrating the characteristic control in the clothes dryer of 1st Example. The schematic side surface longitudinal cross-sectional view of the clothes dryer which is one Example (2nd Example) of 2nd invention. The partially broken perspective view of the drum of the clothes dryer of 2nd Example. The perspective view of the drum of the clothes dryer which is one Example (3rd Example) of 3rd invention. The schematic side surface longitudinal cross-sectional view of the clothes dryer which is one Example (4th Example) of 4th invention. The front schematic longitudinal cross-sectional view of the clothes dryer of 4th Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Housing | casing 2 ... Door 3 ... Drying chamber 3a ... Inlet chamber 3b ... Outlet chamber 3c ... Partition 4 ... Drum 41 ... Clothing inlet 42 ... Recess 43a, 43b, 44, 48 ... Vent hole 45 ... Ring body 46 ... Baffle 47 ... Opening 49 ... Ventilation path 5 ... Main shaft 6 ... Bearing 7 ... Large pulley 8 ... Drum motor 9 ... Motor pulley 10 ... Timing belt 11 ... Outlet 12 ... Intake path 13 ... Inlet 14 ... Heating source 15 ... Inlet 16 ... Exhaust path 17 ... Exhaust port 18 ... Lint filter 19 ... Blower 20 ... Blower motor 50 ... Control unit 51 ... Load drive unit 55 ... Temperature sensor

Claims (6)

A drum that is rotatable about a horizontal or inclined axis, has a substantially cylindrical shape, has a clothing input opening on one end surface, and stores the clothing to be dried inside, and a drying unit that houses the drum An air intake passage for sending air into the drying chamber from an air outlet opened toward the drying chamber, and a clothing input opening facing the drying chamber and in the axial direction of the drum from the air outlet. An exhaust passage for discharging the air in the drying chamber from a suction port provided at a position relatively close to the end face side, and either the intake passage or the exhaust passage. An air flow generating means for generating an air flow through the chamber and the exhaust path, and a heating means for heating the air in the intake path,
In the axial direction of the drum, there is provided air blocking means so that a gap between the outer peripheral surface of the drum and the inner surface of the drying chamber is narrowed between the blower outlet and the suction port. A clothes dryer characterized by a vent hole formed in the center.   The clothes dryer according to claim 1, further comprising a control unit that controls a driving source of the drum so that the rotation speed of the drum is increased in the second half of the drying operation as compared with the first half. A drum that is rotatable about a horizontal or inclined axis, has a substantially cylindrical shape, has a clothing input opening on one end surface, and stores the clothing to be dried inside, and a drying unit that houses the drum An air intake passage for sending air into the drying chamber from an air outlet opened toward the drying chamber, and a clothing input opening facing the drying chamber and in the axial direction of the drum from the air outlet. An exhaust passage for discharging the air in the drying chamber from a suction port provided at a position relatively close to the end face side, and either the intake passage or the exhaust passage. An air flow generating means for generating an air flow through the chamber and the exhaust path, and a heating means for heating the air in the intake path,
Ventilation preventing means is provided in the axial direction of the drum so that a gap between the outer peripheral surface of the drum and the inner surface of the drying chamber is narrowed between the blower outlet and the suction opening, and is separated by the ventilation obstruction means. A clothes dryer characterized in that an air passage having an opening facing the drying chamber on the air outlet side and an opening facing the inside of the drum on the suction port side is provided on the inner surface of the drum.   The clothes dryer according to claim 3, wherein the air passage is formed by using a baffle provided in a drum. A drum that is rotatable about a horizontal or inclined axis, has a substantially cylindrical shape, has a clothing input opening on one end surface, and stores the clothing to be dried inside, and a drying unit that houses the drum An air intake passage for sending air into the drying chamber from an air outlet opened toward the drying chamber, and a clothing input opening facing the drying chamber and in the axial direction of the drum from the air outlet. An exhaust passage for discharging the air in the drying chamber from a suction port provided at a position relatively close to the end face side, and either the intake passage or the exhaust passage. An air flow generating means for generating an air flow through the chamber and the exhaust path, and a heating means for heating the air in the intake path,
Ventilation preventing means is provided in the axial direction of the drum so that a gap between the outer peripheral surface of the drum and the inner surface of the drying chamber is narrowed between the air outlet and the suction port. A clothes dryer characterized in that a vent hole is formed in the entire circumference of the peripheral surface on the outlet side separated by the obstructing means, and a vent hole is formed only in a partial range in the circumferential direction of the peripheral surface on the suction port side. . A drum that is rotatable about a horizontal or inclined axis, has a substantially cylindrical shape, has a clothing input opening on one end surface, and stores the clothing to be dried inside, and a drying unit that houses the drum An air intake passage for sending air into the drying chamber from an air outlet opened toward the drying chamber, and a clothing input opening facing the drying chamber and in the axial direction of the drum from the air outlet. An exhaust passage for discharging the air in the drying chamber from a suction port provided at a position relatively close to the end face side, and either the intake passage or the exhaust passage. An air flow generating means for generating an air flow through the chamber and the exhaust path, and a heating means for heating the air in the intake path,
The suction port is provided on the bottom side of the drying chamber, and the gap between the outer peripheral surface of the drum and the surface of the drying chamber is narrowed between the air outlet and the suction port in the axial direction of the drum. A clothes dryer characterized in that a ventilation blocking means, part of which is interrupted on the bottom side, is provided on the inner surface of the drying chamber.

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