Dryer

Abstract

To provide a dryer capable of exhibiting a high fire extinguishing effect.SOLUTION: The fire extinguishing device includes a housing 1, a drum 2 arranged inside the housing 1 and rotatable at least in one direction, a hot air introduction port 34 capable of drying an object 100 stored in the drum 2 by introducing hot air into the drum 2, and sheet-like fire extinguishing materials 6, 7. The sheet-like fire extinguishing materials 6 and 7 contain a fire extinguishing agent capable of extinguishing fire by generating aerosol by thermal decomposition. The sheet-like fire extinguishing materials 6 and 7 are attached inside the housing 1 and at a position higher than the lower end of the drum 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a dryer. [Background technology]

[0002] BACKGROUND ART Dryers that use hot air to dry objects such as clothes are known in the art. Such dryers are required to be equipped with a fire extinguishing means in case the objects catch fire due to overheating.

[0003] The following Patent Document 1 proposes a technology to extinguish a fire by detecting a fire with a sensor, activating an actuator, and injecting fire extinguishing gas into the dryer. However, with this technology, there is a risk that the fire extinguishing device will not work if the power supply is lost.

[0004] Patent Document 2 below proposes a sheet-shaped fire extinguishing material that generates an aerosol through thermal decomposition. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-123988 [Patent Document 2] Publication No. 3245262 Summary of the Invention [Problem to be solved by the invention]

[0006] As a result of various studies, the present inventors have found that the fire extinguishing effect inside a dryer can be improved by placing a sheet-shaped fire extinguishing material at a predetermined position inside the dryer.

[0007] The present invention was made based on this finding, and a main object of the present invention is to provide a dryer that can exhibit a high fire extinguishing effect. [Means for solving the problem]

[0008] The present invention can be expressed as the inventions described in the following items.

[0009] (Item 1) The fire extinguishing device includes a housing, a drum disposed inside the housing and rotatable in at least one direction, a hot air inlet that can introduce hot air into the drum to dry objects stored in the drum, and a sheet-shaped fire extinguishing material, The sheet-shaped fire-extinguishing material contains a fire-extinguishing agent capable of extinguishing a fire by generating an aerosol through thermal decomposition, The sheet-shaped fire extinguishing material is attached inside the housing and at a position higher than the lower end of the drum. Dryer with automatic extinguishing function.

[0010] (Item 2) A baffle that can drop when heated to a set temperature or higher is attached to the inner surface of the drum so as to protrude toward the inner surface of the drum, the sheet-like fire-extinguishing material is held between the baffle and the inner surface of the drum so that the surface of the sheet-like fire-extinguishing material is covered by the baffle; When the baffle falls, the surface of the sheet-shaped fire extinguishing material is exposed. Item 1. The dryer according to item 1.

[0011] (Item 3) The sheet-shaped fire extinguishing material is disposed on the inner surface of the housing. Item 1. The dryer according to item 1.

[0012] (Item 4) A conductor is disposed on the surface of the sheet-shaped fire extinguishing material, and the conductor can be broken by heating. The dryer described in item 3.

[0013] (Item 5) The sheet-shaped fire-extinguishing material is covered with a covering material, and the covering material is configured to be ruptured by the pressure of the aerosol generated from the sheet-shaped fire-extinguishing material when heated, and the conductor is attached to the covering material, thereby making the conductor rupturable by heating. Item 4. The dryer according to item 4.

[0014] (Item 6) A temperature sensor capable of detecting a temperature rise is disposed on the surface of the sheet-shaped fire extinguishing material. The dryer described in item 3. [Effects of the Invention]

[0015] According to the technology of the present invention, it is possible to provide a dryer that can exert a high fire extinguishing effect. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic explanatory diagram of a dryer according to an embodiment of the present invention, viewed from the front; [Figure 2] FIG. 2 is an explanatory diagram showing an enlarged view of a main part of FIG. 1. [Figure 3] FIG. 3 is a cross-sectional view of a main part taken along line AA in FIG. 2. [Figure 4] FIG. 2 is a schematic plan view of a sheet-shaped fire-extinguishing material disposed in a drum. [Figure 5] FIG. 2 is a schematic plan view of a sheet-shaped fire-extinguishing material disposed within a housing. [Figure 6] FIG. 6 is a schematic front view of the sheet-shaped fire-extinguishing material of FIG. 5. [Figure 7] FIG. 10 is a schematic plan view of a modified sheet-type fire extinguishing agent. DETAILED DESCRIPTION OF THE INVENTION

[0017] A dryer according to one embodiment of the present invention will be described below with reference to FIGS.

[0018] (Dryer configuration) The dryer of this embodiment is for drying clothing 100, which is an object to be dried, with warm air. This dryer has a housing 1, a drum 2 arranged inside the housing 1 and rotatable in at least one direction, a warm air introduction section 3 that can introduce warm air into the drum 2 to dry the clothing (i.e., object) 100 stored in the drum 2, and an exhaust section 4 for exhausting the warm air (see FIG. 1). A drum-specific sheet-type fire-extinguishing material 6 is arranged inside the drum 2 (see FIGS. 2 and 3), and a housing-specific sheet-type fire-extinguishing material 7 is arranged inside the housing 1.

[0019] (drum) Baffles 21 that protrude inward are attached to the inner surface of the drum 2 (see FIGS. 1 and 2). In this embodiment, three baffles 21 are used, but there are no particular restrictions on the number, and they may be two or less or four or more.

[0020] Each baffle 21 is attached to the drum 2 with a screw 22 (see Figure 3). The baffles 21 soften when heated above a set temperature, allowing them to fall (or separate) from the drum 2 under their own weight. Such baffles 21 can be made of, for example, a resin with relatively low heat resistance. As a result, the baffles, which can fall when heated above a set temperature, are attached to the inner surface of the drum 2 so as to protrude toward the inner surface of the drum.

[0021] A drum drive belt 5 is attached to the drum 2 (see FIG. 1). The drum drive belt 5 is connected to a motor 43 (described later), so that the motor 43 can drive the drum 2 via the drum drive belt 5. In the example of FIG. 1, the rotation direction of the drum 2 is clockwise, but this is not a limitation.

[0022] Further, inside the drum 2, there is disposed an internal drum temperature sensor 24 for detecting the temperature inside the drum 2 and controlling the operation of the motor 43, the gas burner 33 and an alarm (not shown).

[0023] (Warm air intake section) The hot air introduction section 3 is composed of a hot air flow path 31, a combustion chamber 32 provided on the inlet side of the hot air flow path 31, and a gas burner 33 installed facing the combustion chamber 32. The hot air introduction section 3 is designed so that outside air heated by the gas burner 33 in the combustion chamber 32 can be blown into the inside of the drum 2 from a hot air inlet 34 provided on the outlet side of the hot air flow path 31.

[0024] (Exhaust section) The exhaust unit 4 is composed of an exhaust flow path 41, a fan 42 provided in the path to send the exhaust gas downstream, and a motor 43 that rotates and drives the fan 42, so that the exhaust gas can be discharged to the outside from an exhaust port 44. An exhaust temperature sensor 45 for detecting the exhaust gas temperature is disposed in the exhaust flow path 41. The exhaust temperature sensor 45 detects the temperature of the exhaust gas and controls the operation of the motor 43, gas burner 33, and alarm (not shown).

[0025] (Sheet fire extinguishing material for drums) In this embodiment, the drum sheet-type fire-extinguishing material 6 is sandwiched between the baffle 21 and the drum 2. As a result, the drum sheet-type fire-extinguishing material 6 is held between the baffle 21 and the inner surface of the drum 2 so that the surface of the drum sheet-type fire-extinguishing material 6 is covered by the baffle 21.

[0026] The drum-type sheet-type fire-extinguishing material 6 is attached to the drum 2 with heat-resistant rivets 23, so that even if the baffle 21 falls, the drum-type sheet-type fire-extinguishing material 6 can remain on the inner surface of the drum 2. That is, in this embodiment, after the baffle 21 falls, the surface of the sheet-type fire-extinguishing material 6 is exposed to the inner surface of the drum 2.

[0027] The drum-shaped fire-extinguishing material 6 contains a fire-extinguishing agent that can extinguish a fire by generating an aerosol through thermal decomposition. The drum-shaped fire-extinguishing material 6 is covered with a covering material 61 (see FIG. 4). Specifically, the covering material 61 is a laminate of a resin film. When aerosol is generated from the sheet-shaped fire-extinguishing material 6, the covering material 61 is easily broken by the pressure, allowing the aerosol to be released to the outside.

[0028] In this embodiment, the sheet-type fire-extinguishing materials 6 for the drum are attached inside the drum 2 (see FIG. 1), and therefore move with the rotation of the drum 2. However, any (or all) of the sheet-type fire-extinguishing materials 6 are located inside the housing 1 and at a position higher than the lower end of the drum 2.

[0029] The rest of the configuration of the sheet-type fire extinguishing material 6 can be the same as that of Patent Document 2, and therefore further detailed description thereof will be omitted. Such a sheet-type fire extinguishing material 6 is available as "K / SMOKE" (product name) manufactured by Yamato Protec Co., Ltd.

[0030] (Sheet-type fire extinguishing material for housing) A housing sheet-type fire extinguishing material 7 is attached to the inner surface of the housing 1. In this embodiment, as shown in Fig. 1, two sheets of the housing sheet-type fire extinguishing material 7 are used, but one sheet, or three or more sheets may be used. The housing sheet-type fire extinguishing material 7 is also attached inside the housing 1 at a position higher than the lower end of the drum 2.

[0031] The sheet-shaped fire-extinguishing material 7 for the housing is covered with a covering material 71 (see FIG. 5). The covering material 71 has the same structure as the covering material 61.

[0032] As shown in Fig. 5, a conductor 8 is disposed on the surface of the sheet-like fire-extinguishing material 7 for the housing. In this embodiment, the conductor 8 is attached to the inner surface of the covering material 71. This allows the conductor 8 to break when the covering material 71 breaks. In other words, the conductor 8 breaks due to the pressure of the aerosol when the aerosol is generated from the sheet-like fire-extinguishing material 7 by heating.

[0033] The rest of the configuration of the sheet-type fire extinguishing material 7 can be the same as that of the drum-type sheet-type fire extinguishing material 6, so a more detailed description thereof will be omitted.

[0034] (dryer operation) Next, the operation of the dryer of this embodiment will be described. When drying the clothes 100, first, the clothes 100 are placed inside the drum 2 through an opening (not shown) formed in the housing 1. Next, the opening of the housing 1 is closed, and warm air generated by heating with the gas burner 33 is introduced into the drum 2 through the warm air inlet 34. Meanwhile, the drum 2 is driven to rotate by the motor 43 and the drum drive belt 5. As the drum 2 rotates, the clothes 100 inside the drum 2 are repeatedly raised and dropped while being exposed to the warm air and dried. The warm air supplied to the drum 2 is exhausted from the exhaust outlet 44 via the exhaust flow path 41 by the fan 42. Since this drying operation is basically the same as that of a conventional dryer, further detailed description will be omitted.

[0035] (Fire extinguishing action) Next, a fire extinguishing operation of the dryer of this embodiment will be described. Suppose a fire breaks out inside the dryer for some reason. Possible causes of the fire include, for example, excessive drying time, clogging of the exhaust flow path 41, or the material of the clothes 100, but the cause of the fire is not particularly limited.

[0036] (Fire extinguishing action inside the drum) When a fire breaks out inside the drum 2, the heat causes the baffle 21, which is fixed with the screws 22, to soften and fall (or break away). This causes the surface of the sheet-type fire-extinguishing material 6, which is arranged between the baffle 21 and the inner surface of the drum 2, to become exposed to the outside (see FIG. 4). In this state, the sheet-type fire-extinguishing material 6 is directly exposed to the heat of the fire. As a result, the sheet-type fire-extinguishing material 6 generates aerosols through thermal decomposition. These aerosols rupture the covering material 61 of the sheet-type fire-extinguishing material 6 and are released to the outside (i.e., into the drum 2). This makes it possible to extinguish a fire in the clothing 100 even if the power supply is lost.

[0037] In this embodiment, the sheet-type fire extinguishing material 6 is installed at a position higher than the lower end of the drum 2 (see FIG. 1), which has the advantage that the fire extinguishing efficiency of the aerosol generated from the sheet-type fire extinguishing material 6 can be increased compared to when the sheet-type fire extinguishing material 6 is installed at a lower position.

[0038] Furthermore, in this embodiment, since multiple baffles 21 are installed, at least one of the baffles 21 can be positioned higher than the lower end of the drum 2. From this viewpoint, it is preferable that the number of baffles 21 be three or more. It is also preferable that the baffles 21 are spaced equally apart.

[0039] Furthermore, in this embodiment, since the sheet-shaped fire-extinguishing material 6 is covered with the covering material 61, the covering material 61 burns, which has the advantage that the extinguishing agent in the sheet-shaped fire-extinguishing material 6 becomes more reactive (i.e., it becomes easier to release aerosol).

[0040] (Fire extinguishing action inside the housing) Next, a fire extinguishing operation will be described in the event of a fire breaking out inside the housing 1. Here, it is believed that a fire inside the housing 1 is often caused by the burning of clothing 100 inside the drum 2, but this is not a limitation. When a fire breaks out inside the housing 1, the heat causes the sheet-like fire-extinguishing material 7 for the housing to thermally decompose, generating an aerosol. This causes the covering material 71 covering the sheet-like fire-extinguishing material 7 to break, and the aerosol is released to the outside (i.e., into the housing 1). This allows the fire inside the housing 1 to be extinguished even if the power supply is lost.

[0041] In this embodiment, the conductor 8 is formed on the covering material 71 for the sheet-like fire-extinguishing material 7, so that rupture of the covering material 71 can rupture the conductor 8. When the detection circuit 10 (see FIG. 5) detects rupture of the conductor 8, it stops the motor 43. This makes it possible to stop exhaust by the exhaust unit 4. If exhaust is being performed, some of the generated aerosol may be discharged to the outside, reducing the fire-extinguishing effect. In this embodiment, stopping the exhaust can prevent a reduction in the fire-extinguishing effect. Furthermore, by detecting rupture of the conductor 8, it is also possible to stop the gas being supplied to the gas burner 33.

[0042] Furthermore, the sheet-type fire-extinguishing material 7 for housings is also installed at a position higher than the lower end of the drum, similar to the sheet-type fire-extinguishing material 6 for drums, which has the advantage of enhancing the fire-extinguishing effect. Other advantages of the sheet-type fire-extinguishing material 7 for housings are basically the same as those of the sheet-type fire-extinguishing material 6 for drums, so further detailed explanation will be omitted.

[0043] Furthermore, in this embodiment, the drum internal temperature sensor 24 and the exhaust temperature sensor 45 are provided, so that if either sensor detects a temperature exceeding the set temperature, the operation of the gas burner 33, motor 43, etc. can be stopped or an alarm can be activated.

[0044] (Variation) In the above-described embodiment, the conductor 8 is attached to the sheet-type fire-extinguishing material 7 for the housing. However, instead of the conductor 8, a temperature sensor 9 capable of detecting a temperature rise may be attached to the sheet-type fire-extinguishing material 7 (see FIG. 7). Specifically, for example, the temperature sensor 9 can be attached to the surface of the covering material 71 of the sheet-type fire-extinguishing material 7. The temperature sensor 9 can be, for example, a sensor using a thermal fuse. In the event of a fire, the occurrence of a fire can be detected by detecting a disconnection of the thermal fuse of the temperature sensor 9. The subsequent operations can be the same as those in the above-described embodiment.

[0045] In the above-described embodiment, the conductor 8 breaks when the covering material 71 of the sheet-like fire-extinguishing material 7 for the housing breaks, but the conductor 8 may be made of a material that melts when heated. In this case, it is possible to detect the occurrence of a fire in the same way as a thermal fuse. In this case, it is also possible that the covering material 71 and the conductor 8 are spaced apart.

[0046] It should be noted that the present invention is not limited to the above-described embodiment, and various modifications may be made to the specific configuration of the present invention within the scope of the claims.

[0047] Furthermore, in the above-described embodiment, the sheet-type fire extinguishing material is attached to a dryer, but it is also possible to attach the sheet-type fire extinguishing material to a boiler instead of a dryer. For example, by attaching the sheet-type fire extinguishing material to an appropriate position in the heat exchange chamber, fuel supply line, fuel tank, etc. of the boiler, it is possible to extinguish a fire in the boiler. [Explanation of symbols]

[0048] 1. Housing 2 drums 21 Baffle 22 screws 23 Rivet 24 Drum temperature sensor 3 Warm air intake section 31 Warm air flow path 32 Combustion chamber 33 Gas Burner 34 Warm air inlet 4 Exhaust section 41 Exhaust flow path 42 Fans 43 Motor 44 Exhaust port 45 Exhaust gas temperature sensor 5 Drum drive belt 6 Sheet fire extinguishing material for drums 61 Sheet fire extinguishing material covering for drums 7. Sheet fire extinguishing material for housing 71 Sheet fire extinguishing material covering for housing 8 Conductors 9 Temperature Sensor 10 Detection circuit 100 Clothing (Object)

Claims

1. The fire extinguishing device includes a housing, a drum disposed inside the housing and rotatable in at least one direction, a hot air inlet that can introduce hot air into the drum to dry objects stored in the drum, and a sheet-shaped fire extinguishing material, The sheet-shaped fire-extinguishing material contains a fire-extinguishing agent capable of extinguishing a fire by generating an aerosol through thermal decomposition, The sheet-shaped fire extinguishing material is attached inside the housing and at a position higher than the lower end of the drum. Dryer with automatic extinguishing function.

2. A baffle that can drop when heated to a set temperature or higher is attached to the inner surface of the drum so as to protrude toward the inner surface of the drum, the sheet-like fire-extinguishing material is held between the baffle and the inner surface of the drum so that the surface of the sheet-like fire-extinguishing material is covered by the baffle; When the baffle falls, the surface of the sheet-shaped fire extinguishing material is exposed. The dryer of claim 1 .

3. The sheet-shaped fire extinguishing material is disposed on the inner surface of the housing. The dryer of claim 1 .

4. A conductor is disposed on the surface of the sheet-shaped fire extinguishing material, and the conductor can be broken by heating. The dryer according to claim 3.

5. The sheet-shaped fire-extinguishing material is covered with a covering material, and the covering material is configured to be ruptured by the pressure of the aerosol generated from the sheet-shaped fire-extinguishing material when heated, and the conductor is attached to the covering material, thereby making the conductor rupturable by heating. The dryer according to claim 4.

6. A temperature sensor capable of detecting a temperature rise is disposed on the surface of the sheet-shaped fire extinguishing material. The dryer according to claim 3.

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