JP6535878B2 - Futon dryer - Google Patents

Description

  The present invention relates to a futon dryer used for drying and warming futons and beds.

  Conventionally, this type of futon drying device is, as disclosed in, for example, Patent Document 1, a hot air generating device is built in and a hot air is generated from a main body having an open top and an air inlet provided in an outer shell of the main body. A heater case provided with an air passage formed up to the suction port of the device, and a heater case provided with a heater of the warm air generating device provided in the air passage, and an overheat prevention device attached to the wall surface of the heater case That is, the overheat prevention device is configured to be attached to the wall surface on the rear case side of the heater case.

Japanese Patent Application Laid-Open No. 2000-279697

  In the futon dryer described in Patent Document 1, the overheat protection device is attached to the wall surface on the rear case side of the heater case, the detection response of the temperature rise at the time of abnormality is low, and the detection of the temperature rise is made quick. There is a problem called.

  In order to achieve this object, the futon dryer of the present invention comprises a box-shaped main body case having an air inlet, an air blowing means and a control unit provided in the main body case, and an air blow from the air blowing means. It has a hose which is a passage, the blower means has a suction port and a discharge port, the discharge port has a bypass air path and a heating air path extending from the discharge port to the hose, and the heating air path has a heating means The first temperature detection means is provided in the heating air passage downstream of the heating means, the second temperature detection means is provided in the bypass air passage, and the control unit is configured to set the first set value and the second set value. If the first set value is higher than the second set value and the detection value of the first temperature detection means is higher than the first set value, or if the second temperature detection means When the detected value is higher than the second set value, a futon dryer characterized by interrupting energization to the heating means

  This achieves the initial objective.

As mentioned above, in order to achieve the object of the present invention, the fan dryer of the present invention is
A box-shaped main body case having an air inlet, a blower and a controller provided in the main body case, and a hose serving as a blower for air blown from the blower are provided. The blower includes an inlet and an outlet. And the outlet has a bypass air passage extending from the outlet to the hose and a heating air passage, the heating air passage is provided with a heating means, and the heating air passage is provided downstream of the heating means in the heating air passage. And the second temperature detection means in the bypass air path, the control unit has the first set value and the second set value, and the first set value is the second set value. If the detection value of the first temperature detection means is higher than the setting value of the first temperature detection means, or if the detection value of the second temperature detection means is higher than the second setting value, the heating means It is characterized in that the energization to the current is cut off.

  That is, at the time of abnormality such as a state where the suction port or the blowout port is blocked, or when abnormal high temperature air is suctioned, temperature rise inside the main body can be detected promptly, and overheating inside the main body can be prevented. As a result, the safety can be further improved.

The perspective view of the futon dryer of embodiment of this invention Schematic cross section of the same futon dryer The perspective view of the heater box of the same futon dryer Control block diagram of the same futon dryer The figure which shows the relationship of the detection temperature of the 1st temperature detection means of the same futon dryer, the detection temperature of the 2nd temperature detection means, and the output of a heating means ((A) When an inlet or an outlet is obstructed Figure, (B) Figure when intake of abnormal high temperature air) Cross-sectional view of the heater box of the futon dryer viewed from the side The figure which shows the relationship of the detection temperature of the 1st temperature detection means of the futon drier, the detection temperature of the 2nd temperature detection means, and the output of a heating means (figure when a ventilation means stops) Top view of the heater box of the futon dryer viewed from the top

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment
FIG. 1 is a perspective view of the fan dryer according to the embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the fan dryer according to the embodiment of the present invention. FIG. 3 is a perspective view of a heater box of the fan dryer according to the embodiment of the present invention.

  As shown in FIG. 1, FIG. 2 and FIG. 3, the futon drying apparatus according to the first embodiment of the present invention comprises a box-shaped main body case 1 and has an operation part 2 on the upper part of the main body case 1 At the lower part of 1 there is an intake 3. The user operates the operation unit 2 to set the operation and the operation mode of the present apparatus, and can confirm the setting contents by the display means 2A disposed in the vicinity of the operation unit 2.

  In the main body case 1, a control unit 5, an air blowing means 9, a heater box 11, a hose 12 and a nozzle portion 13 are provided. The heater box 11 is disposed above the blower means 9, and the hose 12 is disposed above the heater box 11.

  The blower unit 9 includes a scroll-shaped casing portion 6, a motor portion 7 fixed in the casing portion 6, and a fan 8 rotated by the motor portion 7.

  The casing portion 6 is provided with a suction port 6A and a discharge port 6B. When the fan 8 is rotated by the motor unit 7, the air sucked from the suction port 6A is blown out from the discharge port 6B.

  The heater box 11 is connected to the upper portion of the blower 9. The heater box 11 is provided on the downstream side in the air blowing direction of the air blowing means 9 and on the upstream side in the air blowing direction of the hose 12. In the heater box 11, a bypass air passage 16 which is an air passage connecting the casing portion 6 of the air blowing means 9 and the hose 12 and a heating air passage 15 are provided. As a result, in the heater box 11, the air blown out by the blower 9 passes through the heating means 10 in the heater box 11, and the bypass air path which does not pass the heating means 10 around the heating means 10. It divides into 16 and.

  The heating air passage 15 is an air passage extending from the discharge port 6B of the casing portion 6 to the hose 12, and the heating means 10 is provided in the air passage. The air blown out from the outlet 6B of the blower 9 is heated by the heater 10.

  The bypass air passage 16 is an air passage extending from the discharge port 6B of the casing portion 6 to the hose 12. It is an air path which does not pass through the heating means 10. The bypass air passage 16 and the heating air passage 15 extend in parallel in the heater box 11.

  The hose 12 has a flexible cylindrical shape, and is an air flow path of air blown from the air blowing means 9. The hose 12 is connected to the upper portion of the heater box 11.

  A nozzle portion 13 is provided at the tip of the hose 12, and the nozzle portion 13 is provided with an outlet 14.

  A first temperature detection means 17 is provided in the heating air passage 15 located downstream of the heating means 10, and a second temperature detection means 18 is provided in the bypass air passage 16 beside the heating means 10. There is.

  FIG. 4 is a control block diagram in the present embodiment.

  As shown in FIG. 4, the control unit 5 detects the operation mode set by the user from the operation unit 2 and lights the LED of the display unit 2A as set from the input, and the blower unit 9 and the heating unit It is possible to freely set 10 outputs. Further, the control unit 5 detects detection values of the first temperature detection unit 17 and the second temperature detection unit 18.

  A feature of the present embodiment is that the control unit 5 has a first set value 19 and a second set value 20, and the control unit 5 includes a first set value 19 and a second set value 20, The point is to control the energization of the heating means 10 by the temperature detection means 17 and the detection temperature of the second temperature detection means 18.

  That is, the heater box 11 holds and fixes the heating means 10, and sends the air taken into the main body case 1 from the air inlet 3 by the air blowing means 9 to the air outlet 14 via the heating means 10 A bypass air passage 16 is provided for blowing air taken into the main body case 1 from the intake port 3 through the heating means 10 in the heater box 11 without passing through the heating means 10 and blowing it to the outlet 14.

  Furthermore, the heater box 11 is provided with a first temperature detection means 17 for detecting the temperature of the heating air passage 15 and a second temperature detection means 18 for detecting the temperature of the bypass air passage 16. . The first temperature detection means 17 is held by the fixed portion 21 projecting from the heater box 11 located on the downstream side of the heating air passage 15 of the heating means 10, and the second temperature detection means 18 is a heater box on the side of the heating means 10. 11 is held by a fixing portion (not shown) of the wall surface. In a normal operation state, the first temperature detection means 17 detects the exhaust heat air temperature of the heating means 10, and the second temperature detection means 18 is affected by the heat of the heating means 10 sucked from the intake port 3. No air temperature is detected.

  Here, when the first set value 19 is higher than the second set value 20 and the detected value 17A of the first temperature detection means is higher than the first set value 19, or the detection of the second temperature detection means When the value 18A is higher than the second set value 20, the control unit 5 shuts off the energization to the heating unit 10. As a result, when the intake port 3 or the outlet port 14 is closed or when the temperature taken in from the intake port 3 rises, the temperature rise inside the main body can be detected promptly, and the overheating of the inside of the main body can be prevented. . As a result, the safety can be further improved.

  FIG. 5 is a diagram showing the relationship between the detection value 17A of the first temperature detection means, the detection value 18A of the second temperature detection means, and the output of the heating means 10 in the present embodiment.

  FIG. 5A is a view when the air inlet 3 or the air outlet 14 is closed.

  FIG. 5 (B) is a figure at the time of inhaling abnormal high temperature air.

  This point will be described in more detail with reference to FIGS. 5A and 5B.

  First, FIG. 5A shows the case where the air inlet 3 or the air outlet 14 is closed. That is, this is the case where the dust or the like has accumulated on the air intake port 3 or the air intake port 3 or the air outlet 14 is closed with a futon or the like. In this case, the amount of air blown by the air blowing means 9 decreases, and the amount of air supplied to the heating means 10 decreases, so that the temperature of the heating air passage 15 downstream of the heating air passage 15 rises. The detection value 17A of one temperature detection means rises. On the other hand, the detection value 18A of the second temperature detection means provided in the bypass air passage 16 is easily affected by the radiant heat of the heating means 10 when the air flow rate decreases, but the detection value of the first temperature detection means There is less temperature change than 17A.

  As shown in FIG. 5A, the detection value 17A of the first temperature detection means is higher than the first set value 19 and the detection value 18A of the second temperature detection means is lower than the second set value 20. When it becomes, the control part 5 stops the output of the heating means 10, and performs the output of only the ventilation means 9. FIG.

  Thereby, when the air inlet 3 or the air outlet 14 is closed, the first temperature detection means 17 promptly detects that the air temperature on the downstream side of the heating means 10 has risen, and cuts off the energization to the heating means 10 Thus, the heater box 11, the hose 12, the nozzle portion 13 and the like downstream of the heating means 10 can be prevented from being overheated, and furthermore, the air discharged from the outlet 14 can be prevented from being overheated during futon drying. The abnormal overheating of the bed can be prevented, and as a result, the safety can be further improved.

  Next, FIG. 5 (B) is a case where the temperature inhaled from the inlet 3 rises, that is, the warm air discharged from the outlet 14 is taken into the inlet by covering the body case 1 with a futon etc. This is the case where the suction temperature rises due to the effect of an external heat source or a short circuit to 3. In this case, the temperature in the main body case 1 rises due to the rise of the temperature of the suction air, the temperature of the bypass air passage 16 rises, and the detection value 18A of the second temperature detection means provided in the bypass air passage 16 To rise. On the other hand, the temperature of the heating air passage 15 also rises with the suction temperature rise, and the temperature of the detection value 17A of the first temperature detection means rises, but the temperature change is larger than the detection value 18A of the second temperature detection means Few.

  As shown in FIG. 5B, the detection value 18A of the second temperature detection means is higher than the second set value 20, and the detection value 17A of the first temperature detection means is lower than the first set value 19. When it becomes, the control part 5 stops the output of the heating means 10, and performs the output of only the ventilation means 9. As shown in FIG.

  Thereby, when the temperature taken in from the intake port 3 rises, the second temperature detection means 18 promptly detects that the temperature of the air flowing through the bypass air passage 16 rises and cuts off the energization to the heating means 10. Since it is possible to prevent overheating in the main body case 1 and to prevent overheating of the air discharged from the outlet 14 at the time of futon drying, abnormal overheating of the futon is prevented, resulting in further safety. It can be improved.

  Further, the control unit 5 provides the third setting value 22 lower than the first setting value 19 and the second setting value 20, and the detection value 17A of the first temperature detection means is higher than the first setting value 19 In the case where the detection value 18A of the second temperature detection means is higher than the second set value 20, the control unit 5 cuts off the energization to the heating means 10 and then detects the first temperature detection means When the value 17A or the detection value 18A of the second temperature detection means falls below the third set value 22, the control unit 5 is characterized in that the heating means 10 is energized.

  Specifically, as shown in FIG. 5 (A), when the intake port 3 or the blowout port 14 is closed, the detection value 17A of the first temperature detection means detects the first set value 19, and heating is performed. After deenergizing the means 10 and outputting only the air blowing means 9, the detected value 17A of the first temperature detecting means is not affected by the heat of the heating means 10, so the temperature is lowered. When the detection value 17A of the first temperature detection means decreases and reaches the third set value 22, the heating means 10 is energized again and the drying operation is performed.

  Furthermore, as shown in FIG. 5 (B), when the temperature sucked from the intake port 3 rises, the detection value 18A of the second temperature detection means detects the second set value 20, and the heating means 10 is After the current supply is cut off and the output of only the air blowing means 9 is performed, the detected value 18A of the second temperature detecting means is not affected by the heat of the heating means 10, so the temperature decreases. When the detection value 18A of the second temperature detection means decreases and reaches the third set value 22, the heating means 10 is energized again and the drying operation is performed.

  Thereby, when abnormal overheat is detected, the energization of the heating means 10 is cut off, abnormal overheat of the inside of the main body case 1 and the like is prevented, and the energization of the heating means 10 is resumed when the abnormal overheat condition disappears. it can. As a result, the safety can be further improved and the drying performance can be ensured.

  FIG. 6 is a cross-sectional view of the heater box in the present embodiment as viewed from the side.

  Further, as shown in FIG. 6, a partition plate 23 is provided between the first temperature detection means 17 and the heating means 10 to divide the heating air passage 15 and the bypass air passage 16. The partition plate 23 has a flat plate shape extending in the air blowing direction. The material is a resin, and in one example, it is a highly heat resistant resin such as a PET resin.

  Specifically, the fixed portion 21 protruding from the heater box 11 holding the first temperature detection means 17 has a partition plate 23 extending from the bottom surface of the fixed portion 21 to the heating means 10, and heating from the partition plate 23 The first temperature detection means 17 is disposed on the center side of the means 10. By separating the heating air passage 15 and the bypass air passage 16 by the partition plate 23, the first temperature detection means 17 detects the temperature of only the heating air passage 15 without being affected by the temperature of the bypass air passage 16. Since the temperature rise of the exhaust heat air of the heating means 10 at the time of abnormality can be detected promptly, the energization to the heating means 10 can be interrupted. As a result, the safety can be further improved.

  Further, the partition plate 23 is disposed closer to the heating air passage 15 than the boundary between the heating air passage 15 and the bypass air passage 16.

  The partition plate 23 is disposed closer to the center of the heating means 10 than the end face of the heating means 10 which is the boundary between the heating air passage 15 and the bypass air passage 16. As a result, the air flowing from the bypass air passage 16 is less likely to flow into the heating air passage 15 than the lower end face of the partition plate 23, and the first temperature detection means 17 is not affected by the temperature of the bypass air passage 16. Since the temperature of only the heating air passage 15 can be detected, the temperature rise of the exhaust heat air of the heating means 10 at the time of abnormality can be promptly detected, and the energization of the heating means 10 can be interrupted. As a result, the safety can be further improved.

  As shown in FIG. 3, one example of the heating means 10 is a PTC heater. In the PCT heater, a plurality of flat plate-like PTC elements 10A are arranged at the central portion, and meandering fins 10B are provided so as to sandwich the PTC elements 10A. The fins 10B on both sides of the PTC element 10A are provided with crimped portions 10D crimp-connected to the lead portions 10C, and the output from the control unit 5 is output to the PTC heater through the lead portions 10C.

  By energizing the fins 10B on both sides of the PTC element 10A, the central PTC element 10A generates heat. However, although the PTC element 10A repeatedly generates heat when the heat generation of the PTC element 10A is taken away by the air blowing to the fin 10B, the heat generation of the PTC element 10A is not taken when the air is not sent to the fin 10B. Is to be suppressed.

  The first temperature detection means 17 and the partition plate 23 are arranged to intersect with the fins 10B so as to be orthogonal to each other. As a result, compared with the case where the first temperature detection means 17 and the partition plate 23 are arranged parallel to the fins, the air having passed through many fins 10B flows along the partition plate 23, Therefore, the temperature of the PTC heater can be accurately detected by the first temperature detection means 17.

  Further, the control unit 5 has a fourth set value 24, the fourth set value 24 is lower than the first set value 19, and the detected value 17 A of the first temperature detection means is greater than the fourth set value 24. When a low detection value is detected, and when the second temperature detection means 18 detects a detection value higher than the second set value 20, the operation of the device is stopped.

  FIG. 7 is a diagram showing the relationship between the detection value 17A of the first temperature detection means, the detection value 18A of the second temperature detection means, and the output of the heating means 10 in the present embodiment, and the blower means 9 It is a figure at the time of stopping.

  This point will be described in detail with reference to FIG. FIG. 7 shows the case where the air blowing means 9 is stopped, and the air blowing means 9 does not operate due to the state where the current supply to the air blowing means 9 is stopped or the lock of the motor unit 7 or the like.

  In this case, since the air supplied to the heating means 10 is lost, the first temperature detection means 17 for detecting the exhaust heat air temperature of the heating means 10 loses the air supply to the first temperature detection means 17. , Lower than normal temperature. On the other hand, the temperature of the second temperature detection means 18 provided in the bypass air path 16 is affected by the radiant heat of the heating means 10 by the absence of air flow, and the temperature rises. As shown in FIG. 7, when the detection value 17A of the first temperature detection means is lower than the fourth setting value 24 and the detection value 18A of the second temperature detection means is higher than the second setting value 20 The control unit 5 stops the output of the heating unit 10 and the blowing unit 9 to stop the device. Further, an abnormality is detected, and at the same time the device is stopped, the LED indicating the abnormality provided on the display means 2A lights up, and the operation by the operation unit 2 is invalidated.

  As a result, when an abnormality occurrence state is detected, it is possible to notify the abnormality of the device by not accepting the operation of the main body and by notifying the user by the display means 2A, thereby preventing the further unsafe state. As a result, safety can be improved.

  FIG. 8 is a plan view of the heater box in the present embodiment as viewed from above.

  As shown in FIGS. 6 and 8, the second temperature detection means 18 is closer to the heating means 10 than the first temperature detection means 17.

  Thereby, when the air blowing means is stopped, the first temperature detecting means 17 and the second temperature detecting means 18 detect the temperature of the radiant heat of the heating means 10. At this time, the first temperature detection means 17 is disposed at a place away from the heating means 10 where the influence of the radiant heat of the heating means 10 is small, while the second temperature detection means 18 is susceptible to the influence of the radiant heat of the heating means 10 By arranging the heating unit 10 near the heating unit 10, it is easy to detect that the air blowing unit 9 has stopped, and it is possible to quickly stop the device. As a result, the safety can be further improved.

  Further, the thermal fuse 25 is disposed in the vicinity of the caulking portion 10D of the heating means 10 so as to face the bypass air passage 16. The thermal fuse 25 is disposed in series with the power supply circuit, and when the thermal fuse 25 is overheated and the thermal fuse 25 is fused, the power supply circuit is cut off and the device is stopped. The thermal fuse 25 is installed above the crimped portion 10D of the heating means 10 in the heater box 11, and can detect abnormal overheating due to corrosion or contact failure of the crimped portion 10D and stop the main body. Furthermore, the thermal fuse 25 faces the bypass air passage 16 so that even if the first temperature detection means 17 and the second temperature detection means 18 do not operate due to failure or the like, the abnormal heating of the heating means 10 occurs. When the state is detected and the thermal fuse 25 is overheated and the thermal fuse 25 is fused, the device can be stopped. As a result, the safety can be further improved.

  The futon dryer according to the present invention is useful as a futon dryer and the like used for drying and warming of futons and beds.

DESCRIPTION OF SYMBOLS 1 main body case 2 operation part 2A display means 3 intake port 5 control part 6 casing part 6A suction port 6B discharge port 7 motor part 8 fan 9 air blowing means 10 heating means 10A PTC element 10B fin 10C lead part 10D crimp part 11 heater box 12 Hose 13 nozzle portion 14 air outlet 15 heating air path 16 bypass air path 17 first temperature detection means 17A detection value of first temperature detection means 18 second temperature detection means 18A detection value of second temperature detection means 19 First set value 20 Second set value 21 Fixing part 22 Third set value 23 Partition plate 24 Fourth set value 25 Thermal fuse

Claims (7)

A box-shaped main body case having an air inlet, a blowing means and a control unit provided in the main body case, and a hose which is an air blowing path of air blown from the air blowing means, the air blowing means has a suction port And a discharge port, and the discharge port has a bypass air passage and a heating air passage extending from the discharge opening to the hose, and the heating air passage is provided with a heating means, and the downstream side of the heating means A first temperature detection means in the heating air passage, and a second temperature detection means in the bypass air passage, the control unit having a first set value and a second set value The first set value is higher than the second set value, and the detected value of the first temperature detecting means is higher than the first set value, or the detected value of the second temperature detecting means Is higher than a second set value, the current supply to the heating means is cut off. N dryer. The control unit provides a third set value lower than the first set value and the second set value, and the detection value of the first temperature detection means is higher than the first set value, or If the detection value of the second temperature detection means is higher than a second set value, the detection value of the first temperature detection means or the second value of the second temperature detection means after the current supply to the heating means is cut off. The futon dryer according to claim 1, wherein when the detection value of the temperature detection means falls below the third set value, the heating means is energized. The futon dryer according to claim 1 or 2, wherein a partition plate for dividing the heating air passage and the bypass air passage is provided between the first temperature detecting means and the heating means. The futon dryer according to claim 3, wherein the partition plate is disposed closer to the heating air passage than a boundary between the heating air passage and the bypass air passage. The control unit has a fourth set value, the fourth set value is lower than the first set value, and the first temperature detection unit
The present invention is characterized in that the operation is stopped when a detected value lower than the fourth set value is detected, and the second temperature detection means detects a detected value higher than the second set value. Futon dryer according to any one of 4. The futon dryer according to any one of claims 1 to 5, wherein the second temperature detection means is closer to the heating means than the first temperature detection means. The heating means is a PCT heater, and a plurality of flat plate-like PTC elements are arranged at a central portion, and meandering fins are provided to sandwich the PTC elements, and leads are provided to the fins on both sides of the PTC element 7. A crimped portion connected by pressure bonding to a portion, and a thermal fuse is disposed in the vicinity of the crimped portion of the heating means, facing the bypass air path, according to any one of claims 1 to 6. Futon dryer.

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