Clothes dryer

Abstract

To make a capacity of a rotary drum stored in a body case as large as possible and prevent combustion failure of a burner.SOLUTION: A combustion chamber 5 is disposed in a space S formed between a fan case 4 and a peripheral wall 110 on a rear side of a body case 11. A burner 9 is disposed in the combustion chamber 5 so that a plurality of flame hole rows 91 are aligned in parallel at a prescribed interval in a front-back direction. An air intake opening 58 is formed on constitution walls 51 to 56 of the combustion chamber 5. A projection piece 59 is formed on an opening edge 58a on downstream side of a combustion exhaust flowing channel of the air intake opening 58 so as to protrude toward outside of the combustion chamber 5 on upstream side of the combustion exhaust flowing channel.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a clothes dryer.

Background Art

[0002] Conventionally, there has been a clothes dryer in which an intake and exhaust fan is disposed behind a rotary drum, a combustion chamber in which a burner is housed is disposed below the side of the rotary drum, and an air supply duct is connected between the combustion chamber and a hot air outlet provided in front of the rotary drum (for example, Patent Document 1).

[0003] By the way, since the overall size of the clothes dryer is determined for each product, when a combustion chamber in which a burner is arranged horizontally with its flame holes facing outward in the left - right direction is disposed below the side of the rotary drum as in Patent Document 1, it is necessary to reduce the diameter of the rotary drum by the width of the combustion chamber. Also, when heating the air taken into the combustion chamber by an intake and exhaust fan and supplying hot air from the front hot air outlet to the rotary drum as in Patent Document 1, it is necessary to deflect the flow path direction of the hot air in the combustion chamber from the left - right direction to the front - rear direction. Therefore, the width of the combustion chamber becomes larger, and it is necessary to further reduce the diameter of the rotary drum.

[0004] Also, in the clothes dryer of Patent Document 1, it is conceivable to accommodate the burner in a narrow combustion chamber so that the opening direction of the flame holes of the burner coincides with the flow path direction of the combustion exhaust in the combustion chamber. However, when a plurality of burners are accommodated in the combustion chamber, interference of the combustion flames formed in adjacent flame holes is likely to occur due to the air taken into the combustion chamber through the air holes formed in the constituent walls of the combustion chamber, and there is a problem that combustion failure is likely to occur.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention solves the above problems, and its objective is to maximize the capacity of the rotating drum housed in the main body case, and to prevent burner combustion failure even when the combustion chamber is arranged in a narrow space in order to increase the capacity of the rotating drum. [Means for solving the problem]

[0007] According to the present invention, A clothes dryer having a roughly rectangular box-shaped main case with a clothes removal opening at the front, and an opening / closing door for opening and closing the clothes removal opening, Inside the main case, A rotating drum for storing clothes, A combustion chamber housing the burner, It has a fan case located behind the rotating drum, which houses an intake and exhaust fan that takes in air into the combustion chamber, supplies the air heated by the burner as hot air into the rotating drum, and exhausts the hot air from inside the rotating drum to the outside. The combustion chamber is located in the space formed between the fan case and the upper, lower, left, and right peripheral walls at the rear of the main body case. The burner has a row of flame holes arranged in a predetermined interval between them. In the combustion chamber, burners are arranged so that multiple rows of flame holes are parallel to each other at predetermined intervals in the front-to-back direction. The structural walls of the combustion chamber are provided with air intake openings to draw air into the combustion chamber. A clothes dryer is provided in which a protruding piece is formed on the downstream edge of the combustion exhaust flow path of the air intake opening, and which protrudes upstream of the combustion exhaust flow path and outward from the combustion chamber.

[0008] According to the above-described clothes dryer, the fan case is located behind the rotating drum, and the combustion chamber is located in the space formed between the fan case and the upper, lower, left, and right peripheral walls at the rear of the main body case. Since the combustion chamber is not located below the side of the rotating drum, the capacity of the rotating drum housed within the main body case can be increased without increasing the overall size of the clothes dryer.

[0009] On the other hand, in the above-mentioned clothes dryer, since the combustion chamber is arranged in a narrow space within the main body case, it is necessary to arrange multiple rows of flame holes in parallel in the front-to-back direction when arranging the burner in the combustion chamber. In addition, the air flowing near the combustion chamber due to the rotational drive of the intake and exhaust fan includes air flowing in the opposite direction to the flow path of the combustion exhaust. Therefore, interference of combustion flames formed in adjacent flame holes is likely to occur due to the air taken into the combustion chamber from the air intake openings opened in the structural walls of the combustion chamber. However, in the above-mentioned clothes dryer, a protruding piece is formed on the downstream edge of the air intake opening on the flow path of the combustion exhaust, and protrudes outward from the combustion chamber. As a result, the air taken into the combustion chamber from the air intake opening flows along the flow of combustion exhaust in the combustion chamber, toward the downstream side of the flow path of the combustion exhaust, and is less likely to flow toward the burner. This prevents interference of combustion flames formed in adjacent flame holes, even when multiple rows of flame holes are arranged in parallel in the front-to-back direction within the combustion chamber, and prevents burner combustion failure. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a schematic longitudinal cross-sectional view showing a clothes dryer according to an embodiment of the present invention. [Figure 2] Figure 2 is a schematic rear view showing a clothes dryer according to an embodiment of the present invention. [Figure 3] Figure 3 is a schematic exploded perspective view of the main parts of a clothes dryer according to an embodiment of the present invention. [Figure 4] Figure 4 is a schematic perspective view of the main part of a clothes dryer near the combustion chamber according to an embodiment of the present invention. [Figure 5] Figure 5 is a schematic perspective view showing a burner and burner box according to an embodiment of the present invention. [Figure 6] Figure 6 is a schematic longitudinal cross-sectional view of the main part of a combustion chamber according to an embodiment of the present invention. [Modes for carrying out the invention]

[0011] The following describes a clothes dryer according to an embodiment of the present invention. Figure 1 is a schematic vertical cross-sectional view showing a clothes dryer according to this embodiment, Figure 2 is a schematic rear view with the rear wall of the main body case omitted, and Figure 3 is a schematic exploded perspective view of the main components arranged in front of and behind the rotating drum. As shown in Figure 1, the clothes dryer 1 according to this embodiment has an outer casing composed of a roughly rectangular box-shaped main body case 11 and an opening / closing door 12 that covers the clothes removal opening 100 opened on the front of the main body case 11 from the front side. In this specification, the side with the opening / closing door 12 of the clothes dryer 1 is referred to as the front side, the depth direction is referred to as the front-to-back direction, the width direction as the left-to-right direction, and the height direction as the up-and-down direction when viewing the clothes dryer 1 from the front side.

[0012] The main case 11 has a front wall 11a through which the clothing removal opening 100 opens, a rear wall 11b facing the front wall 11a in the front-to-back direction, and a peripheral wall 110 consisting of upper and lower walls 11c, 11d and left and right walls 11e, 11f that connect the upper and lower left and right sides of the front wall 11a and the rear wall 11b.

[0013] Inside the main case 11, a cylindrical rotating drum 3, having a circular opening 130 on its front side, is housed in a sideways position. An annular front ring 31 protruding forward is formed on the outer peripheral edge of the front opening 130 of the rotating drum 3. An annular front drum support 14 is formed on the outer peripheral edge of the clothing removal opening 100 on the rotating drum 3 side, and an annular front support portion 140 is provided protruding rearward from the outer peripheral portion of the front drum support 14. A ring-shaped front sealing member 201 is provided around the outer peripheral edge of the front support portion 140 of the front drum support 14.

[0014] The inner circumferential surface of the front ring 31, which is provided in the opening 130 of the rotating drum 3, faces the outer circumferential surface of the front support portion 140 of the front drum support 14, and is supported in contact with the outer circumference of the front sealing member 201. This prevents the hot air from the front of the rotating drum 3 from leaking out of the opening 130 into the main body case 11.

[0015] In a certain area below the lower part of the cylindrical clothing outlet 100, a semi - arc - shaped opening (hereinafter referred to as the "warm air outlet") 121 is provided. A removable mesh - shaped air filter 19 is attached to the warm air outlet 121. When the warm air in the rotary drum 3 is sent into the exhaust duct 20 through the warm air outlet 121 and a communication duct 120 described later, the air filter 19 removes dust and lint floating in the rotary drum 3.

[0016] A rear wall 133 is connected to the rear end of the body portion 131 of the rotary drum 3. A circular concave portion bulging rearward is formed on the outer peripheral portion of the rear wall 133. A cylindrical support shaft 15 is inserted through the central portion of the rear wall 133 of the rotary drum 3.

[0017] The support shaft 15 is inserted through a rear drum support 111 erected in the main body case 11 behind the rear wall 133 of the rotary drum 3. The rear drum support 111 is formed in a substantially U - shaped form having a flat plate portion and bent portions bent rearward at both left and right ends of the flat plate portion by forming a single metal plate into a predetermined shape. A circular convex portion bulging forward is formed on the outer peripheral portion of the flat plate portion of the rear drum support 111. The convex portion has an opening 112 with a certain width in an annular region facing a duct connection port 171 formed on the front surface of an air supply duct 17 described later. Also, the rear wall 133 of the rotary drum 3 is connected to the outer periphery of the middle portion of the support shaft 15 via a bearing. An annular rear support portion 113 protruding forward is formed on the outer peripheral portion of the convex portion of the rear drum support 111.

[0018] The rear wall 133 forming the concave portion on the inner side of the rotary drum 3 bulges rearward, and the bulging annular outer peripheral surface faces the inner peripheral surface of the rear support portion 113 of the rear drum support 111 via a ring - shaped rear seal member 202.

[0019] A transmission belt 160 is spanned between the outer peripheral portion of the rotary drum 3 and a drum drive pulley on one end side (not shown) of the output shaft of the motor 16. Although not shown, tension is applied to the transmission belt 160 by a belt tension mechanism.

[0020] Furthermore, a fan pulley 151 is attached to the rear end of the support shaft 15, and a fan belt 155 is stretched between the fan pulley 151 and a fan drive pulley 154 attached to the output shaft on the other end of the motor 16. Thus, the rotating drum 3 and the intake and exhaust fan 21 are rotated by a common motor 16 via belt transmission.

[0021] A flat, roughly semi-circular air intake duct 17 is provided in the left region of the rear side of the rear drum support 111 to supply hot air heated by the burner 9 into the rotating drum 3. The air intake duct 17 is formed by joining two metal plates that have been molded into a predetermined shape. An inlet (upstream opening) 170 is provided at the upper rear of the air intake duct 17, which opens to the rear and communicates with the combustion chamber 5, which will be described later. In addition, a duct connection port 171 is provided on almost the entire front surface of the air intake duct 17, which opens to the front and blows hot air forward. Therefore, the air intake duct 17 and the gap between the rear drum support 111 and the rear wall 133 of the rotating drum 3 constitute part of the air intake passage.

[0022] At the center of the rear side of the rear drum support 111, an exhaust duct 20 is provided, which has a flat cylindrical exhaust section 200 that fits into the inner circumference of a roughly semi-circular air intake duct 17 and opens to the front and rear. The rear opening of the exhaust section 200 (hereinafter referred to as the "exhaust outlet") 210 faces the air intake port 40 of the fan case 4, and the front opening of the exhaust section 200 is closed by contacting the rear surface of the rear drum support 111. The exhaust duct 20 extends diagonally downward to the right from the exhaust section 200 and widens to the left and right at its lower end. The lower end of the exhaust duct 20 has an opening that opens to the front, and the exhaust duct 20 is connected via the opening at the lower end of the rear drum support 111 to a connecting duct 120 that extends from the warm air outlet 121 in the area below the clothing removal opening 100 through the gap G formed between the rotating drum 3 and the lower wall 11d of the main body case 11 to the rear of the rotating drum 3. Therefore, the hot air discharged from the hot air outlet 121 is sent to the fan case 4 through the connecting duct 120 and the exhaust duct 20.

[0023] Behind the supply air duct 17 and the exhaust duct 20, a fan case 4 is provided to house the supply and exhaust fan 21. The fan case 4 is formed into a flat, roughly cylindrical box shape by joining a shallow dish-shaped front wall 43 that opens to the rear and is molded to a predetermined shape, and a flat plate-shaped rear wall 44 that is molded to a predetermined shape. The fan case 4 has an intake port 40 that opens in the front wall 43 and communicates with the exhaust outlet 210 of the exhaust duct 20, and a discharge port 41 that protrudes upward tangentially from the circumferential surface of the fan case 4 and communicates with the exhaust port 10 formed in the upper wall 11c of the main body case 11. Therefore, in this embodiment, by rotating the supply and exhaust fan 21, outside air is drawn into the main body case 11 from an intake port of the main body case 11 (not shown). Then, the hot air heated by the burner 9 in the combustion chamber 5, which will be described later, is guided into the rotating drum 3 through the supply air duct 17 described above. Furthermore, the hot air inside the rotating drum 3 is discharged to the hot air outlet 121 described above, and the discharged hot air is guided into the fan case 4 through the connecting duct 120 and the exhaust duct 20, and exhausted to the outside through the exhaust port 10 of the main body case 11.

[0024] Multiple small circular holes (hereinafter referred to as "hot air outlets") 135 are drilled radially from the support shaft 15 in the recess of the rear wall 133 of the rotating drum 3, and the hot air sent to the air supply duct 17 is guided through these hot air outlets 135 into the gap between the rear wall 133 and the cover plate 153, which will be described later.

[0025] A roughly disc-shaped fixing flange 152, which extends outward, is fixed to the front end of the support shaft 15. Furthermore, a disc-shaped cover plate 153, which covers substantially the entire front surface of the rear wall 133 from the inside of the rotating drum 3, is fixed to the front of this fixing flange 152 in a non-rotating state. Although not shown, a plurality of small circular holes are drilled in an annular region of a predetermined width on the outer circumference of the cover plate 153.

[0026] Figure 4 is a schematic perspective view of the main part showing the vicinity of the combustion chamber 5. As shown in Figures 2 and 4, a roughly horizontal L-shaped combustion chamber 5 is arranged in the space S formed at the corner between the fan case 4 and the upper wall 11c and the right wall 11f of the peripheral wall 110 of the main body case 11. The combustion chamber 5 is formed by joining a plurality of metal plates formed into a predetermined shape, and has front and rear, left and right, and top and bottom constituent walls 51 to 56.

[0027] The lower structural wall 56 of the combustion chamber 5 has an upwardly convex, approximately semi-circular arc shape that roughly matches the outer circumference shape of the fan case 4. As a result, the fan case 4 and the combustion chamber 5 face each other with a narrow gap between them, and the vertical height of the combustion chamber 5 is suppressed.

[0028] The length of the combustion chamber 5 in the front-to-back direction is greater than that of the fan case 4, and the rear surface of the roughly horizontally L-shaped rear structural wall 52 is in approximate contact with the flange portion that protrudes outward at the outer peripheral edge of the front wall 43 of the fan case 4. For this reason, the combustion chamber 5 does not protrude further rearward than the fan case 4 in the front-to-back direction (see Figure 1). In addition, in this embodiment, there are no components that protrude further rearward than the fan case 4 other than the bearing of the support shaft 15 provided on the rear wall 44 of the fan case 4, and the fan case 4 is positioned close to the rear wall 11b of the main case 11.

[0029] Furthermore, as previously described, a roughly semi-circular air intake duct 17 is provided between the rear drum support 111 and the fan case 4. As a result, a gap equal to the length of the air intake duct 17 is formed in front of the right region of the front wall 43 of the fan case 4 where the combustion chamber 5 is located. Therefore, the combustion chamber 5 is positioned such that its front structural wall 51 is located in the gap in front of the front wall 43 of the fan case 4. This makes it possible to provide a combustion chamber 5 with a certain length in the front-to-back direction without having the combustion chamber 5 protrude further rearward than the fan case 4.

[0030] The front structural wall 51 has a deformed pentagonal shape, and its length in the left-right direction is smaller than that of the rear structural wall 52. Therefore, an outlet (downstream opening) 57 is open to the front on the left side of the front structural wall 51 of the combustion chamber 5. This outlet 57 of the combustion chamber 5 is connected to an inlet (upstream opening) 170 provided on the upper rear surface of the intake air duct 17, so as to face it in the front-rear direction. Since the front structural wall 51 of the combustion chamber 5 is located in front of the front wall 43 of the fan case 4, the combustion chamber 5 and the intake air duct 17 are arranged to overlap in the front-rear direction. Therefore, as shown in Figure 1, the outlet 57 of the combustion chamber 5 and the inlet 170 of the intake air duct 17 are connected so as to partially overlap in the front-rear direction. This makes it possible to suppress the combined length of the combustion chamber 5 and the intake air duct 17 in the front-rear direction, and also allows warm air to be sent linearly from the combustion chamber 5 to the intake air duct 17. Note that the combustion chamber 5 and the intake air duct 17 may be formed as a single integrated unit, either partially or entirely.

[0031] The upper structural wall 55 of the combustion chamber 5 has a roughly rectangular shape with its length in the left-right direction and extends roughly horizontally from near the right wall 11f of the main body case 11 to the left of the center of the main body case 11 in the left-right direction. Therefore, in this combustion chamber 5, the left-right direction is the longitudinal direction. The right structural wall 53 inside the combustion chamber 5 has a roughly rectangular shape and extends roughly vertically downward from near the upper wall 11c of the main body case 11 to about the height of the upper half of the fan case 4. The left structural wall 54 of the combustion chamber 5 extends roughly vertically downward from near the upper wall 11c of the main body case 11 to above the fan case 4.

[0032] Near the right end of the combustion chamber 5 is a burner box 7 containing the burners 9 shown in Figure 5. As shown in Figure 5, in this embodiment, two burners 9 are arranged vertically within the burner box 7. Each burner 9 has multiple (in this case, 10) flame holes 90 arranged in a row (in this case, 2 rows) at predetermined intervals in one direction vertically, forming multiple (in this case, 4 rows) of flame holes 91 in parallel in the front-to-back direction within the burner box 7. Each flame hole 90 has a vertically elongated slit shape and has a partition plate in the center for flame retention. Furthermore, all flame holes 90 open approximately horizontally toward the same leftward direction. Therefore, the combustion exhaust flows from right to left along the longitudinal direction of the combustion chamber 5. Although not shown, the gas inlets of each burner 9 open downwards with their opening directions aligned, and gas nozzles face the gas inlets. Furthermore, as long as the burner 9 has a structure in which multiple flame hole rows 91 are arranged in parallel in the front-to-back direction within the combustion chamber 5, the number of burners 9, the number of flame holes 90 and flame hole rows 91, and their shapes can be set as appropriate.

[0033] The burner box 7 is formed in a box shape by joining together a plurality of metal plates formed into a predetermined shape. When the burner box 7 is placed in the combustion chamber 5, the burner box 7 has an end plate 70 on its left side through which two rows of flame holes 91 of each burner 9 are inserted, so that the flame holes 90 of the burner 9 are exposed into the combustion chamber 5. The flame hole opening 71 has dimensions in the front-to-back and up-to-down directions that are slightly larger than the dimensions of the two rows of flame holes 91 of the burner 9 through which it is inserted, for ease of installation. In addition, openings (hereinafter referred to as "outer openings") 72 for allowing air to flow into the combustion chamber 5 are opened at the upper and lower ends of the end plate 70, which is spaced outward in the vertical direction from both the upper and lower ends of the flame hole opening 71. Preferably, the outer opening 72 has an opening area larger than the gap between the burner 9 and the flame hole opening 71 when the rows of flame holes 91 of the burner 9 are inserted into the flame hole opening 71. The outer openings 72 may also be formed at the front and rear ends of the end plate 70, spaced outward in the front-rear direction from the front and rear ends of the flame opening 71.

[0034] At the opening edge of the outer opening 72 on the side of the flame hole opening 71, a vertical wall 73 is formed by cutting and raising both the upper and lower ends of the end plate 70, so as to be higher than the protruding height of the flame hole 90 in the leftward direction, which is the opening direction of the flame hole 90. As a result, air drawn into the combustion chamber 5 from the right side of the combustion chamber 5 flows in not only through the gap between the burner 9 and the flame hole opening 71, but also dispersed into the outer opening 72. Furthermore, if the outer opening 72 is formed to be larger than the gap between the burner 9 and the flame hole opening 71, air will flow more easily into the combustion chamber 5 from the outer opening 72. In addition, the vertical wall 73 makes it more difficult for air flowing into the combustion chamber 5 from the outer opening 72 to flow towards the flame hole 90.

[0035] As shown in Figures 2, 4, and 6, multiple first air intake openings 58 are provided at predetermined intervals in the front and rear and upper and lower structural walls 51, 52, 55, and 56 of the combustion chamber 5, extending from near the flame hole 90 of the burner 9 to the center in the left-right direction, which is the longitudinal direction of the combustion chamber 5. The first air intake openings 58 formed in the front and rear structural walls 51 and 52 have a vertically elongated slit shape that intersects the flow direction of the combustion exhaust. The first air intake openings 58 formed in the upper and lower structural walls 55 and 56 also have a vertically elongated slit shape that intersects the flow direction of the combustion exhaust. Furthermore, multiple second air intake openings 60 are provided at predetermined intervals to the left of the center in the left-right direction of the rear structural wall 52. The second air intake openings 60 have a horizontally elongated slit shape along the flow direction of the combustion exhaust and face the outlet 57 (downstream opening) of the combustion chamber 5. By rotating the intake and exhaust fan 21, air from inside the main body case 11 is drawn into the combustion chamber 5 through these first and second air intake openings 58 and 60. The first and second air intake openings 58 and 60 may have a triangular or trapezoidal shape.

[0036] A louver-shaped first projection 59 is formed on the first opening edge 58a on the downstream side of the combustion exhaust of the first air intake opening 58, which is longitudinal in the front-to-back and up-to-down directions, and protrudes outward from the combustion chamber 5 on the upstream side of the combustion exhaust flow path (i.e., the burner side). As a result, the air taken into the combustion chamber 5 from these first air intake openings 58 is less likely to flow toward the burner 9 side.

[0037] Furthermore, a louver-shaped second projection 61 is formed on the lower second opening edge 60a of the second air intake opening 60, which is elongated in the left-right direction, projecting upward and outward from the combustion chamber 5. As a result, the air taken into the combustion chamber 5 from these second air intake openings 60 flows more easily downward. In addition, the second air intake opening 60 faces the outlet 57, which is connected to the inlet 170 of the air supply duct 17. This allows combustion exhaust and air flowing from the upstream side of the combustion chamber 5 to be smoothly guided to the air supply duct 17 via the outlet 57 and inlet 170.

[0038] A roughly rectangular heat shield plate 62 is installed between the upper structural wall 55 of the combustion chamber 5 and the upper wall 11c of the main body case 11, so as to cover the entire upper structural wall 55. This prevents the temperature of the upper wall 11c of the main body case 11 from rising even when the upper structural wall 55 of the combustion chamber 5 is heated by the combustion flame.

[0039] As shown in Figure 2, a roughly rectangular fixing plate 63 is connected to the heat shield 62, extending downward from the rear edge of the heat shield 62 at a certain distance away from the rear structural wall 52 of the combustion chamber 5, approximately parallel to it. A detection unit 301 of an overheat prevention device 300, consisting of a thermal fuse or an OHS (Over Heat Switch), is fixed to the rear surface of the fixing plate 63. When the detection unit 301 of the overheat prevention device 300 detects a temperature above the overheat prevention temperature, it prohibits combustion of the burner 9.

[0040] According to this embodiment, the combustion chamber 5 is located in the space S formed between the fan case 4 and the upper wall 11c and the right wall 11f of the peripheral wall 110 at the rear of the main body case 11. Since the combustion chamber 5 is not located below and to the side of the rotating drum 3, the capacity of the rotating drum 3 housed in the main body case 11 can be increased without increasing the size of the clothes dryer 1. Depending on the configuration of the clothes dryer 1, the combustion chamber 5 can be located in any position within the space formed between the fan case 4 and the peripheral wall 110 at the rear of the main body case 11. For example, the combustion chamber 5 may be located in the space formed between the fan case 4 and the upper wall 11c and the left wall 11e of the upper rear of the main body case. In this case, within the combustion chamber 5, the multiple flame holes 90 open toward the same rightward direction, the multiple flame holes 90 are arranged in the vertical direction in each flame hole row 91, and the multiple flame hole rows 91 are arranged in parallel in the front-to-back direction. Alternatively, the combustion chamber 5 may be located in the space formed between the fan case 4 and the lower wall 11d and the left wall 11e or right wall 11f.

[0041] On the other hand, according to this embodiment, in order to arrange the combustion chamber 5 in the narrow space inside the main body case 11, when arranging the burner 9 in the combustion chamber 5, multiple flame hole rows 91 are arranged in parallel at predetermined intervals in the front-to-back direction. In addition, the air flowing near the combustion chamber 5 due to the rotational drive of the intake and exhaust fan 21 includes air flowing in the opposite direction to the flow path of the combustion exhaust. Therefore, interference of the combustion flame formed in adjacent flame holes 90 is likely to occur due to air taken into the combustion chamber 5 from the first air intake opening 58, which is opened in a certain range on the side where the burner 9 is housed, which is upstream of the flow path of the combustion exhaust of the constituent walls 51, 52, 55, 56 of the combustion chamber 5. However, according to this embodiment, a first protruding piece 59 is formed on the first opening edge 58a on the downstream side of the combustion exhaust flow path of the first air intake opening 58, which is on the upstream side of the combustion exhaust flow path and protrudes outward from the combustion chamber 5. Therefore, the air taken into the combustion chamber 5 from the first air intake opening 58 flows along the flow of combustion exhaust in the combustion chamber 5 toward the intake air duct 17, which is on the downstream side of the combustion exhaust flow path, and is less likely to flow toward the burner 9. Furthermore, according to this embodiment, a second air intake opening 60, which is long in the left-right direction, is provided in a certain range of the rear structural wall 52 facing the outlet 57 on the side of the combustion chamber 5 that is connected to the intake air duct 17, and a second protruding piece 61 is formed on the second opening edge 60a below the second air intake opening 60, which protrudes upward and outward from the combustion chamber 5. Therefore, the combustion exhaust flows more easily toward the intake air duct 17 due to the air flowing into the combustion chamber 5 from the second air intake opening 60. As a result, even when the combustion chamber 5 is located in a narrow space S and multiple flame hole rows 91 are arranged in parallel in the front-to-back direction within the combustion chamber 5, interference between combustion flames formed in adjacent flame holes 90 can be prevented, and combustion exhaust and air taken into the combustion chamber 5 can be smoothly supplied to the air supply duct 17.

[0042] As described above, according to this embodiment, the capacity of the rotating drum 3 housed in the main body case 11 can be increased without increasing the size of the clothes dryer 1. Furthermore, according to this embodiment, combustion failure of the burner 9 can be prevented.

[0043] In the above embodiment, the first air intake opening 58 is formed in the front, rear and upper and lower structural walls 51, 52, 55, and 56 of the combustion chamber 5. However, the first air intake opening 58 may be formed in any one of the structural walls of the combustion chamber 5.

[0044] Furthermore, in the above embodiment, the first air intake opening 58 has a slit shape that is longitudinal in the vertical or front-to-back direction and intersects substantially perpendicular to the flow direction of the combustion exhaust. However, the first air intake opening 58 may be formed in a direction that intersects the flow direction of the combustion exhaust at an inclined angle. Similarly, the second air intake opening 60 may be formed along an angle inclined to the flow direction of the combustion exhaust.

[0045] Furthermore, the first and second protruding pieces 59 and 61 are each formed in a louver shape. However, the first and second protruding pieces 59 and 61 can be of any shape. For example, the first and second protruding pieces 59 and 61 may consist only of inclined pieces that protrude from each opening edge 58a and 60a upstream of the combustion exhaust flow path and outward toward the combustion chamber 5, or they may consist of a substantially horizontal L-shaped bent piece that protrudes substantially perpendicularly outward toward the combustion chamber 5 from each opening edge 58a and 60a and bends at its tip toward the upstream side of the combustion exhaust flow path. [Explanation of Symbols]

[0046] 1. Clothes dryer 3-rotation drum 4 Fan Case 5 Combustion chamber 57 Outlet 58 First air intake opening 58a First opening edge 59 1st protruding piece 60 Second air intake opening 60a Second opening edge 61 2nd protruding piece 9 burners 90 flame hole 91 Flame hole row 11 Main unit case 11c Upper wall 11d Lower wall 11e Left wall 11th floor, right wall 110 Peripheral wall 12 Opening and closing doors 21 Intake and exhaust fan 17. Air supply duct 170 Inlet 100 Clothes retrieval opening S space

Claims

[Claim 1] A clothes dryer having a roughly rectangular box-shaped main case with a clothes removal opening at the front, and an opening / closing door for opening and closing the clothes removal opening, Inside the main case, A rotating drum for storing clothes, A combustion chamber housing the burner, It has a fan case located behind the rotating drum, which houses an intake and exhaust fan that takes in air into the combustion chamber, supplies the air heated by the burner as hot air into the rotating drum, and exhausts the hot air from inside the rotating drum to the outside. The combustion chamber is located in the space formed between the fan case and the upper, lower, left, and right peripheral walls at the rear of the main body case. The burner has a row of flame holes arranged in a predetermined interval between them. In the combustion chamber, burners are arranged so that multiple rows of flame holes are parallel to each other at predetermined intervals in the front-to-back direction. The structural walls of the combustion chamber are provided with air intake openings to draw air into the combustion chamber. A clothes dryer in which a protruding piece is formed on the downstream edge of the combustion exhaust flow path of the air intake opening, and which protrudes upstream of the combustion exhaust flow path and outward from the combustion chamber.

Images