JP5531404B2 - Equipment - Google Patents

Description

  The present invention relates to equipment installed on a ceiling in a room such as a bathroom.

  Conventionally, a ventilator installed on the ceiling of a building does not have a heat source and is therefore covered with a resin case. On the other hand, bathroom ventilation dryers installed on the ceiling of a bathroom have a heater as a heat source and are covered with a metal case (see, for example, Patent Document 1). Thereby, it can respond to the heat from the inside of an apparatus.

JP 2004-162950 A

  Conventional bathroom ventilation / drying heaters cope with external influences due to heat from inside the machine. On the other hand, there is a problem of dealing with heat from the outside.

In order to solve the above-described problem, the present invention has a main body chassis made of a flame-retardant resin material, a main body portion having a flange portion protruding outward from a peripheral edge of a lower portion of the main body chassis, and a main body A metal case that is placed on the chassis and exposed at the opening formed at the installation location, and the main body has a metal case inserted into the opening at the installation location, and a flange portion that protrudes outside the metal case is a fastening means The metal case has a shape that covers the entire side and top of the main chassis, between the side of the main chassis and the side of the metal case, and between the top of the main chassis and the metal case. between the upper surface, heat transfer is suppressed from the outside of the metal case with respect to the body chassis, and the occurrence of convection of air by heat is spaced to suppress convective inhibition space from the outside of the metal casing forming Is, convective inhibition space, the flange portion by the heat from the outside of the metal case missing from the fastening means, with respect to the separation expected time until separation from the location, the time until the body chassis reaches a predetermined temperature The equipment is formed with a space of 6 mm to 15 mm between the main chassis and the metal case so as to be long .

  In the equipment of the present invention, heat applied to the equipment from the outside is received by a metal case that covers the main body, so that heat is not directly transmitted to the main body chassis made of a resin material. Further, heat transfer from the metal case to the main body chassis is suppressed by the convection suppression space formed between the metal case and the main body chassis.

  According to the equipment of the present invention, transmission of heat to the main body covered with the metal case is suppressed, and it is possible to cope with heat from the outside.

  Hereinafter, with reference to the drawings, a description will be given of a bathroom ventilation drying and heating machine as an example of an air conditioner as an embodiment of the equipment of the present invention.

<Configuration Example of Bathroom Ventilation Dryer / Heater of First Embodiment>
Drawing 1 is a sectional view showing an example of the bathroom ventilation drying heating machine of a 1st embodiment. 1 A of bathroom ventilation drying heaters of 1st Embodiment are provided with the incombustible case 3 which covers the main-body part 2 and the main-body part 2. FIG. The main body 2 includes a fan 20F that is rotationally driven by a fan motor 20M, a heater 20H, and a main body chassis 21 that forms a fan case.

  As for the main-body part 2, the lower side along the axial direction of the fan 20F opens, and the suction inlet 22a is formed. The main body 2 has an air outlet 22b formed on the lower side along the air blowing direction of the fan 20F, and an exhaust port 22c formed on a side surface along the air blowing direction of the fan 20F.

  Furthermore, the main body 2 includes an air path switching damper 23 that switches the air path between the air outlet 22b and the exhaust port 22c. The air path switching damper 23 receives a driving force of a damper motor, which will be described later, and opens and closes the air outlet 22b and the air outlet 22c.

  In the bathroom ventilation dryer 1A, when the position of the air path switching damper 23 is set to a circulation position where the exhaust port 22c is closed as shown by a solid line in FIG. 1, the air outlet 22b is opened and the air inlet 22a is moved to the air outlet 22b. A continuous circulation air passage is formed.

  Further, in the bathroom ventilation drying / heating machine 1A, when the position of the air passage switching damper 23 is set to a ventilation position where the air outlet 22b is closed as shown by a one-dot chain line in FIG. 1, the air outlet 22c opens and the air is discharged from the air inlet 22a. A ventilation air passage communicating with the opening 22c is formed.

  Further, in the bathroom ventilation dryer 1A, when the position of the air path switching damper 23 is a circulation ventilation position between a circulation position and a ventilation position indicated by a two-dot chain line in FIG. 1, both the outlet 22b and the exhaust outlet 22c are provided. Opens to form both a circulation air passage and a ventilation air passage.

  As the heater 20H, for example, a PTC heater is provided at the air outlet 22b. When the air path switching damper 23 is set to the circulation position or the circulation ventilation position, the fan motor 20M is driven to rotate the fan 20F, and when the heater 20H is energized, the heater 20H is heated and the air passing through the outlet 22b is heated. Is warmed, and warm air is blown out from the air outlet 22b.

  In addition, as the main-body part 2 of 1 A of bathroom ventilation drying heaters, the structure etc. with which the circulation fan and the ventilation fan were provided separately, and the circulation air path and the ventilation air path became independent may be sufficient.

  The main body chassis 21 includes a fan case portion 21a in which a space to which the fan motor 20M, the fan 20F, the heater 20H, and the like are attached is formed, and a flange portion 24 that protrudes outward from the lower periphery of the fan case portion 21a.

  The main body chassis 21 is made of a flame retardant resin material, in this example, an ABS resin [acrylonitrile, butadiene (Butadiene), styrene (Styrene) copolymer synthetic resin] in this example, and a fan case portion 21a. Are integrally formed so as to protrude from the upper surface on the inner peripheral side of the flange portion 24.

  The flange portion 24 is formed with a hole portion into which a screw 101 for attaching the bathroom ventilation dryer 1A to the ceiling panel 100 is inserted. The hole portion opens with a diameter larger than the diameter of the shaft portion of the screw 101 and smaller than the diameter of the head portion.

  The main body chassis 21 includes a fixing protrusion 25 to which the incombustible case 3 is fixed. The fixing protrusion 25 is integrally provided on the upper part and the side part of the fan case part 21a, and a hole part to which the screw 26 is fastened is formed.

  The main body chassis 21 may be configured such that an aluminum tape 27 is provided on the upper surface of the flange portion 24. The aluminum tape 27 is within a predetermined range along the inner peripheral side of the upper surface of the flange portion 24 exposed to the opening 102 when the bathroom ventilation dryer 1A is attached to the opening 102 formed in the ceiling panel 100. , Pasted all around. Moreover, in order to prevent moisture due to steam or the like in the bathroom from leaking to the back of the ceiling, a configuration may be adopted in which a packing made of sponge or the like is provided on the upper surface of the aluminum tape 27.

  The incombustible case 3 is an example of a metal case, and a substantially rectangular parallelepiped structure that is covered with the main body chassis 21 that constitutes the main body 2 and has an open bottom surface is formed of a metal plate material. When the incombustible case 3 is put on the main body chassis 21, the lower end portion contacts the upper surface on the inner peripheral side of the flange portion 24, and the flange portion 24 is exposed in a form of protruding outward, and on the upper side of the flange portion 24. The fan case portion 21a has a shape that covers the entire side portion and upper portion.

  The incombustible case 3 is formed with an opening corresponding to the exhaust port 22c. Further, the non-combustible case 3 is formed with a hole in accordance with the fixing protrusion 25 of the main body chassis 21.

  In the bathroom ventilation / drying / heating machine 1 </ b> A, the main body 2 is covered with the non-combustible case 3, and the screw 26 inserted into the hole of the non-combustible case 3 is fastened to the fixing protrusion 25 of the main body chassis 21.

  When the non-combustible case 3 is put on the main body 2 and fixed with screws 26, the lower end of the non-combustible case 3 covering the fan case portion 21 a of the main body chassis 21 contacts the upper surface of the flange portion 24.

  An aluminum tape 27 is affixed to the upper surface of the flange portion 24 including a position where the lower end portion of the non-combustible case 3 contacts, and between the lower end portion of the non-combustible case 3 and the aluminum tape 27 on the upper surface of the flange portion 24. The main body chassis 21 inside the incombustible case 3 is configured not to form a gap that is directly exposed to heat from the outside.

  In the bathroom ventilation / drying heater 1 </ b> A, when the incombustible case 3 is put on the main body 2 and fixed with the screw 26, a convection suppression space 28 is formed between the main body chassis 21 and the incombustible case 3.

  The convection suppression space 28 has an interval equal to or greater than a predetermined lower limit distance so that heat transfer to the main body chassis 21 is suppressed when heat is applied from the outside of the incombustible case 3. Moreover, it has a space | interval below a predetermined | prescribed upper limit distance so that generation | occurrence | production of the air convection between the nonflammable case 3 and the main body chassis 21 can be suppressed. In the bathroom ventilation dryer 1A, when heat is applied from the outside of the non-combustible case 3, the lower limit distance and the upper limit of the convection suppression space 28 are set so that the main body chassis 21 does not reach a predetermined temperature within a predetermined time. The distance is determined, and in this example, the convection suppression space 28 is set to about 6 mm to about 15 mm.

  In the bathroom ventilation dryer 1A, a duct joint 4 connected to the exhaust port 22c is attached to one side surface of the incombustible case 3. The duct joint 4 is made of a metal plate material.

  A front panel 5 is attached to the lower part of the main body 2 of the bathroom ventilation dryer 1A. The front panel 5 has an inlet grill 50a formed in accordance with the position of the inlet 22a, and an outlet grill 50b formed in accordance with the position of the outlet 22b.

  The installation example of the bathroom ventilation / drying heater 1A will be described. The bathroom ventilation / drying / heating apparatus 1A is configured such that the main body 2 covered with the non-combustible case 3 is placed in the ceiling from the opening 102 formed in the ceiling panel 100 of the bathroom. It is done. In the ceiling panel 100, the mounting bracket 103 is installed, and the screw 101 inserted into the hole of the flange portion 24 of the main body chassis 21 sandwiches the ceiling panel 100 between the flange portion 24 and the mounting bracket 103. Fastened to the mounting bracket 103.

  Thus, the ceiling panel 100 is sandwiched between the flange portion 24 of the bathroom ventilation dryer 1A and the mounting bracket 103, and the bathroom ventilation dryer 1A is attached to the ceiling panel 100. In the bathroom ventilation dryer 1 </ b> A attached to the ceiling panel 100, the front panel 5 is attached to the lower part of the main body 2.

  Even when the aluminum tape 27 is attached to the upper surface of the flange portion 24 attached to the ceiling panel 100, the aluminum tape 27 is thin, so that the mounting height of the main body 2 with respect to the ceiling panel 100 is affected. There is no effect.

  The operation of the bathroom ventilation / drying / heating machine 1A will be described. The bathroom ventilation / drying / heating machine 1A is configured such that when the fan motor 20M is driven and the fan 20F is driven to rotate, the suction port 22a is connected via the suction grille 50a of the front panel 5. The air in the bathroom is sucked from.

  When the position of the air path switching damper 23 is the circulation position indicated by the solid line in FIG. 1, a circulation air path from the suction port 22a to the blowout port 22b is formed, so that the air sucked from the suction port 22a The air is blown out from the air outlet 22b through the road through the air outlet grill 50b of the front panel 5 into the bathroom. Since the heater 20H is disposed at the air outlet 22b, when the heater 20H is energized, the air passing through the circulation air passage is warmed and the hot air is blown out from the air outlet grill 50b.

  Thus, when the fan motor 20 is driven with the air path switching damper 23 as the circulation position, when the heater 20H is energized, hot air is blown out into the bathroom while circulating the air in the bathroom. When the heater 20H is not energized, cool air corresponding to the room temperature is blown out into the bathroom while circulating the air in the bathroom.

  When the position of the air path switching damper 23 is the ventilation position indicated by the alternate long and short dash line in FIG. 1, a ventilation air path from the suction port 22a to the exhaust port 22c is formed, so that the air sucked from the suction port 22a is ventilated. The air passes through the air passage and the exhaust port 22c and is exhausted to the outside.

  Thereby, when the fan motor 20M is driven with the air path switching damper 23 as the ventilation position, steam and moisture in the bathroom are exhausted.

  When the position of the air path switching damper 23 is the circulation ventilation position indicated by a two-dot chain line in FIG. 1, the circulation air path from the inlet 22a to the outlet 22b and the ventilation air path from the inlet 22a to the outlet 22c Since both are formed, a part of the air sucked from the suction port 22a passes through the circulation air passage and is blown out from the blower outlet 22b into the bathroom through the blower outlet grill 50b of the front panel 5. The remaining portion of the air sucked from the suction port 22a passes through the ventilation air passage and the exhaust port 22c and is exhausted to the outside.

  Thereby, when the fan motor 20M is driven with the air path switching damper 23 as the circulation ventilation position, when the heater 20H is not energized, the steam and moisture in the bathroom are exhausted while circulating the air in the bathroom. The

  On the other hand, when the heater 20H is energized, the steam and moisture in the bathroom are exhausted while circulating the air in the bathroom and blowing hot air into the bathroom.

<Examples of effects of the bathroom ventilation dryer / heater according to the first embodiment>
When the bathroom ventilation dryer 1A according to the first embodiment is attached to the ceiling panel 100, the incombustible case 3 covering the main body 2 protrudes from the opening 102 formed in the ceiling panel 100 to the back of the ceiling. It is. Thereby, the main-body part 2 comprised with a resin material is not directly exposed to the ceiling back of a bathroom.

  Assume that a fire should occur in the building where the bathroom ventilation dryer 1A according to the first embodiment is installed. Even if the fire spreads over the ceiling of the bathroom, the bathroom ventilating / drying machine 1A has a main body made of a resin material because the portion protruding from the ceiling of the main body 2 is covered with a metal incombustible case 3. The chassis 21 is not directly exposed to fire, and the main chassis 21 is prevented from firing.

  Moreover, if it is set as the structure by which the aluminum tape 27 is affixed to the part exposed to the opening part 102 of the ceiling panel 100 on the upper surface of the flange part 24 attached to the ceiling panel 100, the main body comprised with a resin material Firing from the flange portion 24 of the chassis 21 is prevented.

  Generally, even if a resin material is not directly exposed to fire, it may self-ignite when the temperature exceeds a predetermined temperature due to the material or the like. A time required for the temperature of the main body chassis 21 to reach a predetermined self-ignition temperature when heat is applied to the main body chassis 21 made of a resin material from the outside of the non-combustible case 3 is referred to as a self-ignition time.

  FIG. 2 is a graph showing the relationship between the spatial distance between the incombustible case and the main body chassis and the self-ignition time. If the space distance between the incombustible case and the main unit chassis is small, when heat is applied from the outside of the incombustible case, heat is easily transferred to the main unit chassis, and the time required for the main unit chassis to self-ignite is shortened. .

  On the other hand, if the spatial distance between the incombustible case and the main unit chassis is large, when heat is applied from the outside of the incombustible case, air convection occurs in the space between the incombustible case and the main unit chassis, and the air convection As a result, heat is easily transferred, and the time required for the main chassis to self-ignite is shortened.

  In the bathroom ventilation dryer 1A according to the first embodiment, the convection suppression space 28 formed between the incombustible case 3 and the main body chassis 21 has a main body chassis when heat is applied from the outside of the incombustible case 3. The distance is equal to or longer than a predetermined lower limit distance so that heat transfer to 21 is suppressed.

  Further, the convection suppression space 28 has an interval equal to or less than a predetermined upper limit distance so that the occurrence of air convection between the incombustible case 3 and the main body chassis 21 is suppressed when heat is applied from the outside of the incombustible case 3. have.

  Thereby, when heat is applied from the outside of the incombustible case 3, the temperature rise of the main body chassis 21 is suppressed, and the time until the main body chassis 21 reaches a temperature at which it self-ignites is lengthened. Therefore, the time required for the main body chassis 21 to self-ignite becomes longer.

  When a fire occurs in the building and the fire spreads behind the bathroom ceiling, heat is applied to the bathroom ventilation dryer 1A installed on the ceiling panel 100 from the ceiling, so that the main chassis 21 The screw 101 that fixes the flange portion 24 to the ceiling panel 100 is heated.

  The bathroom ventilating / drying / heating apparatus 1 </ b> A melts a portion of the flange portion 24 where the screw 101 contacts with heat transferred from the outside to the screw 101 that fixes the flange portion 24 to the ceiling panel 100. It is the structure which 1A of bathroom ventilation drying heaters can isolate | separate from the ceiling panel 100 which is an installation place.

  If the bathroom ventilation drying heater 1A can be separated from the ceiling panel 100 before the main body chassis 21 reaches a predetermined self-ignition temperature when heat is applied to the bathroom ventilation drying heater 1A from the back of the ceiling, the bathroom ventilation drying heater Since 1A leaves the fire and heat is not applied to the main body chassis 21, the main body chassis 21 does not self-ignite.

  For this reason, if the time required for the main body chassis 21 to self-ignite is made longer than the time required for the bathroom ventilation drying / heating machine 1A to separate from the ceiling panel 100 with heat applied to the bathroom ventilation drying / heating machine 1A from the back of the ceiling. The main body chassis 21 will not self-ignite.

  The time required for the bathroom ventilation / drying / heating machine 1A to separate from the ceiling panel 100 by the heat applied to the bathroom ventilation / drying / heating machine 1A from the back of the ceiling could be about 6 minutes. Therefore, if the time until the main body chassis 21 reaches self-ignition can be made 6 minutes or longer, the self-ignition of the main body chassis 21 can be prevented.

  On the other hand, since the bathroom ventilation drying / heating machine 1A is fixed to the ceiling panel 100 with a plurality of screws 101, heat is applied from a biased range with respect to the bathroom ventilation drying / heating machine 1A, and the flange portion 24 by each screw 101 is provided. If the heat is not uniformly transmitted to the fixed position, the time required for the bathroom ventilation dryer 1A to separate from the ceiling panel 100 may be longer than the expected time.

  Therefore, considering the delay of the separation time from the ceiling panel 100 of the bathroom ventilation dryer 1A due to heat from the outside, if the time until the main chassis 21 reaches self-ignition can be set to 8 minutes or more, for example, the main chassis 21 self-ignition can be reliably prevented.

  As shown in the graph of FIG. 2, it can be seen that the time until the main body chassis 21 self-ignites varies depending on the distance of the space formed between the incombustible case 3 and the main body chassis 21.

  In this example, when heat is applied to the bathroom ventilation dryer / heater 1A from the back of the ceiling, the lower limit distance of the convection suppression space 28 is set so that the time until the main chassis 21 reaches self-ignition is about 8 minutes or more. An upper limit distance is determined. From the graph of FIG. 2, if the convection suppression space 28 is set to about 6 mm to about 15 mm, the time until the main body chassis 21 reaches self-ignition can be about 8 minutes or more.

  Thereby, if the convection suppression space 28 is set to the above-described value, the main body chassis 21 has a predetermined auto-ignition temperature with respect to the estimated separation time from the ceiling panel 100 of the bathroom ventilation dryer 1A by heat from the ceiling. The time to reach can be increased by 2 minutes or more, for example.

  Therefore, even when heat is applied from a biased range with respect to the bathroom ventilation dryer / heater 1A, the bathroom ventilation dryer / heater 1A is mounted on the ceiling panel before the main body chassis 21 reaches a predetermined self-ignition temperature. The main body chassis 21 can be reliably prevented from self-ignition due to heat from the outside.

<Configuration Example of Bathroom Ventilation Dryer / Heater of Second Embodiment>
FIG. 3 is a cross-sectional view showing an example of a bathroom ventilation dryer according to the second embodiment. In the following description, the same number is attached | subjected about the structure equivalent to 1A of bathroom ventilation drying heaters of 1st Embodiment, and description is abbreviate | omitted.

  In the bathroom ventilation dryer 1 </ b> B of the second embodiment, an air blowing space 29 is formed between the main body chassis 21 constituting the main body 2 and the non-combustible case 3 covering the main body chassis 21. Moreover, the temperature detection sensor 31 which detects the temperature of the incombustible case 3 itself, the inside of the incombustible case 3, or the main body chassis 21 itself is provided. Furthermore, the ventilation switching damper 32 which switches whether the ventilation space 29 passes the ventilation W1 which generate | occur | produces when the fan 20F is rotationally driven is provided.

  The temperature detection sensor 31 is an example of a temperature detection unit, and is attached to the inside of the incombustible case 3 in this example. The blower switching damper 32 is an example of a blower switching unit, and is provided in an air outlet 21b formed in the fan case portion 21a of the main body chassis 21 so as to be openable and closable.

  In the state where the blower outlet 21b is closed by the blower switching damper 32, when the fan 20F is driven to rotate, as described above, the air in the bathroom sucked from the suction grille 50a of the front panel 5 is changed to the air path switching damper. Depending on the position of 23, it is circulated in the bathroom or exhausted outdoors.

  On the other hand, when the air outlet 21b is opened by the air blowing damper 32, a part of the air in the bathroom sucked from the air inlet grill 50a of the front panel 5 is blown out from the fan case portion 21a to the air blowing space 29. . The blown air W1 blown into the blower space 29 passes through the blower space 29 and is discharged from the exhaust port 33 formed in the incombustible case 3 to the outside of the machine. The exhaust port 33 is opened downward so that air does not easily enter from the outside of the incombustible case 3.

  FIG. 4 is a functional block diagram illustrating an example of a control system of the bathroom ventilation dryer according to the second embodiment. The bathroom ventilation dryer 1B according to the second embodiment is configured to control a damper motor 51 that drives the fan motor 20M, the heater 20H, and the air path switching damper 23 according to the operation mode selected by the operation of the operation unit 50. 52.

  The control unit 52 is an example of a control unit, and controls a damper motor 53 that drives the blower switching damper 32 based on the temperatures of the incombustible case 3 and the main body chassis 21 detected by the temperature detection sensor 31. That is, when the control unit 52 determines that the temperatures of the incombustible case 3 and the main body chassis 21 detected by the temperature detection sensor 31 have reached a predetermined upper limit temperature, the control unit 52 controls the damper motor 53 to set the air blowing switch damper 32. open. When the fan motor 20M is being driven, the fan motor 20M is continuously driven. When the fan motor 20M is stopped, the fan motor 20M is driven.

<Examples of the effects of the bathroom ventilation dryer / heater according to the second embodiment>
FIG. 5 is a flowchart showing an example of the operation of the bathroom ventilation dryer according to the second embodiment. In the bathroom ventilation dryer 1B according to the second embodiment, the control unit 52 controls the fan motor 20M, the heater 20H, and the heater according to the operation mode selected by the operation of the operation unit 50 by the user or the like in step SA1 of FIG. The damper motor 51 is controlled to execute a heating operation mode in which air in the bathroom is circulated to blow out hot air.

  Also, according to the selected operation mode, ventilation operation mode to exhaust the air in the bathroom, drying operation mode to exhaust a part while circulating the air in the bathroom and blowing hot air, circulating the air in the bathroom However, the cool wind operation mode etc. which exhaust a part are performed. Furthermore, when the operation stop is selected by operating the operation unit 50, the driving of the fan motor 20M and the heater 20H is stopped and the operation is stopped.

  In step SA2, the control unit 52 detects the temperatures of the incombustible case 3, the main body chassis 21, and the like from the output of the temperature detection sensor 31 while the bathroom ventilation dryer / heater 1B is operating and stopped.

  Even if a fire occurs in the building where the bathroom ventilation dryer 1B is installed, and the fire spreads over the bathroom ceiling, the bathroom ventilation dryer 1B protrudes from the ceiling of the main body 2 Is covered with the metal incombustible case 3, the main chassis 21 made of a resin material is not directly exposed to fire, and the main chassis 21 is prevented from being ignited.

  On the other hand, the non-combustible case 3 is heated by heat from the back of the ceiling, and the temperatures of the non-combustible case 3, the main body chassis 21 inside the non-combustible case 3, and the air blowing space 29 between the non-combustible case 3 and the main body chassis 21 rise.

  If it is determined in step SA3 that the temperatures of the incombustible case 3 and the main body chassis 21 detected by the temperature detection sensor 31 have reached predetermined upper limit temperatures, the fan motor 20M is driven during operation in step SA4. If the fan motor 20M is stopped, the drive of the fan motor 20M is continued. If the fan motor 20M is stopped during the operation stop, the fan motor 20M is driven. In step SA5, the damper motor 53 is controlled to open the blower switching damper 32.

  When the air outlet damper 21b opens the air outlet 21b and the fan 20F is driven to rotate, a part of the air in the bathroom sucked from the air inlet grill 50a of the front panel 5 is sent from the fan case portion 21a to the air blowing space 29. Is blown out. The blown air W1 blown into the blower space 29 passes through the blower space 29 and is discharged from the exhaust port 33 to the outside of the machine.

  Thereby, the incombustible case 3 and the main body chassis 21 are cooled by the air blow W <b> 1 passing through the air blow space 29. By cooling the main body chassis 21, it is possible to suppress the main body chassis 21 from reaching a predetermined self-ignition temperature. Moreover, even if fire spreading continues, the time for the main body chassis 21 to reach the self-ignition temperature can be lengthened. Therefore, before the main body chassis 21 reaches a predetermined self-ignition temperature, the bathroom ventilation dryer 1B can be separated from the ceiling panel 100, and the self-ignition of the main body chassis 21 due to heat from the outside can be reliably prevented.

<Configuration Example of Bathroom Ventilation Dryer / Heater of Third Embodiment>
FIG. 6 is a cross-sectional view illustrating an example of a bathroom ventilating / drying heater according to the third embodiment. In the following description, the same number is attached | subjected about the structure equivalent to 1 A of bathroom ventilation drying heaters 1A of 1st Embodiment, and the bathroom ventilation drying heater 1B of 2nd Embodiment, and description is abbreviate | omitted.

  A bathroom ventilation dryer 1C according to the third embodiment includes a blower 34 that generates blower W2 in a blower space 29 formed between the main body chassis 21 and the incombustible case 3. In addition, an intake opening / closing damper 35 that opens and closes an intake opening 21 c formed in the fan case portion 21 a of the main body chassis 21 is provided.

  The intake port opening / closing damper 35 is an example of an intake port opening / closing means, and is operated by being driven by a motor or the like described later. In this example, the intake port 21c is formed near the exhaust port 22c. The inlet opening / closing damper 35 and the blower 34 are controlled based on the temperatures of the non-combustible case 3, the main body chassis 21, the blower space 29, and the like detected by the temperature detection sensor 31.

  When the fan 20F is driven to rotate in a state where the intake opening / closing damper 35 is closed, the air in the bathroom sucked from the intake grill 50a of the front panel 5 is moved to the position of the air path switching damper 23 as described above. Depending on the condition, it is circulated in the bathroom or exhausted outdoors.

  On the other hand, when the air intake opening / closing damper 35 is opened and the blower 34 is rotationally driven, the air in the fan case portion 21a is sucked into the air blowing space 29 from the air intake 21c. The blown air W2 generated by the air sucked into the blower space 29 by the blower 34 passes through the blower space 29 and is discharged from the exhaust port 33 formed in the incombustible case 3 to the outside of the machine.

  FIG. 7 is a functional block diagram illustrating an example of a control system of the bathroom ventilation dryer according to the third embodiment. 1C of bathroom ventilation drying heaters of 3rd Embodiment control the damper motor 51 which drives the fan motor 20M, the heater 20H, and the air path switching damper 23 according to the operation mode selected by operation of the operation part 50. 52.

  The control unit 52 controls the fan motor 34 </ b> M that drives the blower 34 and the damper motor 54 that drives the intake opening / closing damper 35 based on the temperatures of the incombustible case 3 and the main body chassis 21 detected by the temperature detection sensor 31. That is, when the control unit 52 determines that the temperatures of the non-combustible case 3 and the main body chassis 21 detected by the temperature detection sensor 31 have reached a predetermined upper limit temperature, the control unit 52 controls the damper motor 54 to control the intake opening / closing damper 35. open. Further, the fan 34 is driven by the fan motor 34M.

<Examples of the effects of the bathroom ventilation dryer / heater according to the third embodiment>
FIG. 8 is a flowchart showing an example of the operation of the bathroom ventilation dryer according to the third embodiment. In the bathroom ventilation dryer 1C according to the third embodiment, in step SB1 of FIG. 8, the control unit 52 includes the fan motor 20M, the heater 20H, and the operation mode selected by the operation of the operation unit 50 by the user or the like. The damper motor 51 is controlled to execute a heating operation mode in which air in the bathroom is circulated to blow out hot air.

  Also, according to the selected operation mode, ventilation operation mode to exhaust the air in the bathroom, drying operation mode to exhaust a part while circulating the air in the bathroom and blowing hot air, circulating the air in the bathroom However, the cool wind operation mode etc. which exhaust a part are performed. Furthermore, when the operation stop is selected by operating the operation unit 50, the driving of the fan motor 20M and the heater 20H is stopped and the operation is stopped.

  In step SB2, the control unit 52 detects the temperatures of the incombustible case 3 and the main body chassis 21 from the output of the temperature detection sensor 31 during the operation and stoppage of the bathroom ventilation dryer 1C.

  Even if a fire occurs in the building where the bathroom ventilation dryer 1C is installed, and the fire spreads over the bathroom ceiling, the bathroom ventilation dryer 1C protrudes from the ceiling of the main body 2 Is covered with the metal incombustible case 3, the main chassis 21 made of a resin material is not directly exposed to fire, and the main chassis 21 is prevented from being ignited.

  On the other hand, the non-combustible case 3 is heated by heat from the back of the ceiling, and the temperatures of the non-combustible case 3, the main body chassis 21 inside the non-combustible case 3, and the air blowing space 29 between the non-combustible case 3 and the main body chassis 21 rise.

  If it is determined in step SB3 that the temperatures of the non-combustible case 3 and the main body chassis 21 detected by the temperature detection sensor 31 have reached predetermined upper limit temperatures, the damper motor 54 is controlled in step SB4 to open / close the intake port. Open the damper 35. In step SB5, the fan motor 34M is driven. When the fan motor 20M is being driven, the driving of the fan motor 20M is stopped, and the damper motor 51 is driven to move the air path switching damper 23 to the circulation position.

  When the air path switching damper 23 is set to the circulation position and the intake opening / closing damper 35 is opened and the blower 34 is driven to rotate, the air in the fan case portion 21a passes through the exhaust opening 22c connected to the outside, and the intake opening 21c. The air is sucked into the ventilation space 29. The blown air W2 generated by the air sucked into the blower space 29 by the blower 34 passes through the blower space 29 and is discharged from the exhaust port 33 to the outside of the machine.

  Thereby, the incombustible case 3 and the main body chassis 21 are cooled by the air blow W2 passing through the blower space 29. By cooling the main body chassis 21, it is possible to suppress the main body chassis 21 from reaching a predetermined self-ignition temperature. Moreover, even if fire spreading continues, the time for the main body chassis 21 to reach the self-ignition temperature can be lengthened. Therefore, before the main body chassis 21 reaches a predetermined self-ignition temperature, the bathroom ventilation dryer 1C can be separated from the ceiling panel 100, and self-ignition of the main body chassis 21 due to heat from the outside can be reliably prevented.

  If it is determined that the temperatures of the incombustible case 3 and the main body chassis 21 detected by the temperature detection sensor 31 have reached a predetermined upper limit temperature, the fan motor 20M is driven and the air path switching damper 23 is set to the ventilation position. A part of the air in the bathroom sucked from the suction grill 50a of the front panel 5 may be moved into the ventilation space 29 from the suction port 21c.

<Configuration Example of Bathroom Ventilation Dryer / Heater of Fourth Embodiment>
FIG. 9: is sectional drawing which shows an example of the bathroom ventilation drying heater of 4th Embodiment. In the following description, the same number is attached | subjected about the structure equivalent to 1 A of bathroom ventilation drying heaters 1A of 1st Embodiment, and the bathroom ventilation drying heater 1C of 3rd Embodiment, and description is abbreviate | omitted.

  The bathroom ventilation dryer 1D according to the fourth embodiment includes a blower 36 that generates a blower W3 in a blower space 29 formed between the main body chassis 21 and the incombustible case 3. In addition, an air inlet 37 connected to the air blowing space 29 is formed in the main body 2.

  The intake port 37 is formed by providing an opening in the main body chassis 21 at a position connected to the intake port grill 50 a of the front panel 5. The blower 36 is always driven when the power is turned on.

  When the air blower 36 is driven to rotate, the air in the bathroom is sucked into the air blowing space 29 from the air inlet 37 through the air inlet grill 50 a of the front panel 5. The air blow W3 generated by the air sucked into the blower space 29 by the blower 36 passes through the blower space 29 and is discharged from the exhaust port 33 formed in the incombustible case 3 to the outside of the machine.

<Examples of functions and effects of the bathroom ventilation dryer of the fourth embodiment>
Even if a fire occurs in the building where the bathroom ventilation dryer 1D is installed, and the fire spreads over the bathroom ceiling, the bathroom ventilation dryer 1D protrudes from the ceiling of the main body 2 Is covered with the metal incombustible case 3, the main chassis 21 made of a resin material is not directly exposed to fire, and the main chassis 21 is prevented from being ignited.

  Further, the blower 36 is always driven, and air in the bathroom is sucked into the blower space 29 from the suction port 37 through the suction grill 50a of the front panel 5 and blown by the air sucked into the blower space 29 by the blower 36. W3 passes through the air blowing space 29 and is discharged from the exhaust port 33 to the outside of the machine.

  Thereby, the incombustible case 3 and the main body chassis 21 are always cooled by the air blowing W3 passing through the air blowing space 29, and the temperature rise is suppressed. By constantly cooling the main body chassis 21, it is possible to prevent the main body chassis 21 from reaching a predetermined self-ignition temperature. Moreover, even if fire spreading continues, the time for the main body chassis 21 to reach the self-ignition temperature can be lengthened. Therefore, before the main body chassis 21 reaches a predetermined self-ignition temperature, the bathroom ventilation dryer 1D can be separated from the ceiling panel 100, and self-ignition of the main body chassis 21 due to heat from the outside can be reliably prevented.

  The present invention is applied to equipment such as an air conditioner having a heat source.

It is sectional drawing which shows an example of the bathroom ventilation drying heater of 1st Embodiment. It is a graph which shows the relationship between the space distance between a nonflammable case and a main body chassis, and self-ignition time. It is sectional drawing which shows an example of the bathroom ventilation drying heater of 2nd Embodiment. It is a functional block diagram which shows an example of the control system of the bathroom ventilation drying heater of 2nd Embodiment. It is a flowchart which shows the operation example of the bathroom ventilation drying heater of 2nd Embodiment. It is sectional drawing which shows an example of the bathroom ventilation drying heater of 3rd Embodiment. It is a functional block diagram which shows an example of the control system of the bathroom ventilation drying heater of 3rd Embodiment. It is a flowchart which shows the operation example of the bathroom ventilation drying heater of 3rd Embodiment. It is sectional drawing which shows an example of the bathroom ventilation drying heater of 4th Embodiment.

Explanation of symbols

  1A, 1B, 1C, 1D ... bathroom ventilation dryer / heater, 2 ... main body, 21 ... main body chassis, 21a ... fan case, 21b ... blower, 21c ... intake air 24, flange portion, 28 ... convection suppression space, 29 ... air blowing space, 3 ... non-combustible case, 31 ... temperature detection sensor, 32 ... air blowing switching damper, 34 ... -Air blower, 35 ... Air intake opening / closing damper, 36 ... Air blower, 37 ... Air intake, 100 ... Ceiling panel

Claims (1)

A main body chassis made of a flame-retardant resin material, and a main body section having a flange portion protruding outward from a peripheral edge of a lower portion of the main body chassis ;
A metal case that covers the main body chassis and is exposed at an opening formed at the installation location;
In the main body, the metal case is placed in the opening of the installation place, and the flange portion protruding outside the metal case is fixed to the installation place by fastening means,
The metal case has a shape that covers the entire side and upper part of the main body chassis,
Heat transfer from the outside of the metal case to the main body chassis is suppressed between the side surface of the main body chassis and the side surface of the metal case and between the upper portion of the main body chassis and the upper surface of the metal case. And the convection suppression space is formed by providing an interval in which generation of air convection due to heat from the outside of the metal case is suppressed ,
The convection suppression space is until the main body chassis reaches a predetermined temperature with respect to an estimated separation time until the flange portion is removed from the fastening means by heat from the outside of the metal case and separated from the installation location. The facility equipment is characterized by being formed with an interval of 6 mm to 15 mm between the main body chassis and the metal case so as to increase the time .

Images