Dehumidifier

Abstract

To provide a dehumidifier improved in safety by reducing time from occurrence of abnormality to fusion of a thermal fuse.SOLUTION: A dehumidifier includes: a heating part 20 heating a part of a dehumidifying rotor 13; and a thermal fuse 23 fused when the dehumidifying rotor 13 has a prescribed temperature or higher. The dehumidifying rotor 13 includes a plane part 16 passing through an air blowing passage 12. The heating part 20 and the thermal fuse 23 face to a plane part downstream surface 16b which is a plane on the downstream side in the air blowing passage 12 of the plane part 16. The thermal fuse 23 is mounted on the downstream side immediately near the heating part 20 in a rotational direction. The dehumidifier is provided with a shielding plate 24 shielding passage of air of the plane part 16 ranging from the downstream side terminal end in the rotational direction of the heating part 20 to the thermal fuse 23.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a dehumidifying device used, for example, for drying clothes.

Background Art

[0002] Conventionally, this type of dehumidifying device includes a blower that sucks air from a suction port and exhausts it from a blowout port, a dehumidifying rotor that absorbs moisture from the air supplied by the blower, a timing motor that rotates the dehumidifying rotor, a circulation air passage and a circulation blower that circulate regeneration air in a part of the dehumidifying rotor, a heating part that releases moisture from the dehumidifying rotor in the circulation air passage, and a heat exchanger that cools and condenses the regeneration air containing the moisture released by the dehumidifying rotor with the air supplied by the blower, and is known to collect the water generated in the circulation air passage in a water storage tank (for example, see Patent Document 1).

[0003] In the prior art, a temperature fuse is attached as temperature detection means. The temperature fuse is close to the surface of the dehumidifying rotor and is located on the downstream side of the dehumidifying rotor in the wind in which the dehumidifying rotor adsorbs moisture from the indoor air. Further, the temperature fuse is connected in series with the heating part, and when the ambient temperature is above the allowable temperature, the inside of the temperature fuse melts and the power supply to the heating part is stopped.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In conventional dehumidifiers, organic matter contained in the air drawn in through the intake port is typically adsorbed onto the dehumidifying rotor. Furthermore, a malfunction in the dehumidifier can cause the rotation of the dehumidifying rotor to slow down (malrotation) due to a timing motor failure. In this malfunction, the heating time of a specific part of the dehumidifying rotor heated by the heat-generating element becomes longer than before the malfunction, causing the rotor temperature to rise above pre-malfunction levels. Additionally, as time passes after the malfunction, the dehumidifying rotor continues to heat up. At this time, the organic matter adsorbed onto the rotor also continues to heat up, potentially leading to an unsafe situation where it burns when it exceeds a certain temperature. Therefore, there is a need to shorten the time from the occurrence of the malfunction until the thermal fuse blows and power to the heat-generating element is cut off.

[0006] Therefore, the present invention aims to improve the safety of a dehumidifier by shortening the time from the occurrence of an abnormality until the thermal fuse blows. [Means for solving the problem]

[0007] To achieve this objective, the device comprises a main body case having an intake port and an outlet port, an air passage connecting the intake port and the outlet port, a blower that guides air from the intake port to the outlet port, a dehumidifying rotor that dehumidifies the air passing through the air passage, a drive unit that rotates the dehumidifying rotor, a heating element that heats a portion of the dehumidifying rotor, and a thermal fuse that melts when the dehumidifying rotor reaches a predetermined temperature or higher. The dehumidifying rotor has a flat surface that passes through the air passage, the heating element and the thermal fuse face the downstream surface of the flat surface which is the downstream side of the flat surface in the air passage, the thermal fuse is provided immediately downstream of the heating element in the direction of rotation, and is equipped with a shielding plate that blocks the passage of air over the flat surface from the downstream end of the heating element in the direction of rotation to the thermal fuse, thereby achieving the intended objective. [Effects of the Invention]

[0008] As described above, the present invention can provide a dehumidifier that shortens the time from the occurrence of an abnormality until the thermal fuse blows, thereby improving safety. [Brief explanation of the drawing]

[0009] [Figure 1] Rear perspective view of a dehumidifier in an embodiment of the present invention [Figure 2] Disassembled perspective view of the dehumidifier. [Figure 3] Schematic cross-sectional view of the dehumidifier. [Figure 4] Cross-sectional view of the dehumidifier. [Figure 5] Cross-sectional perspective view of the dehumidifier. [Figure 6] Schematic diagram illustrating the safety function section of the dehumidifier. [Figure 7] Cross-sectional diagram showing two cross-sections of the dehumidifier. [Figure 8] Schematic diagram showing the airflow of the dehumidifier. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described below with reference to the drawings.

[0011] (Embodiment 1) The dehumidifying device according to this embodiment will be described below with reference to Figures 1 to 8.

[0012] First, the configuration of the dehumidifier according to this embodiment will be described using Figure 1. Figure 1 is a rear perspective view of the dehumidifier according to an embodiment of the present invention.

[0013] As shown in Figure 1, the dehumidifier 1 of this embodiment includes a box-shaped main body case 2 that forms the outer casing.

[0014] The main unit case 2 comprises an intake port 3, an outlet port 4, and a water reservoir 5, and includes a dehumidification function unit 6 and a safety function unit 7, which will be described later.

[0015] The suction port 3 is an opening for sucking the air in the indoor space into the main body case 2, and is provided on the back surface of the main body case 2.

[0016] The air outlet 4 is an opening for blowing out the air from the inside of the main body case 2 into the indoor space, and is provided on the upper part (top surface) of the main body case 2. Above the air outlet, a rotatable louver 8 is provided.

[0017] The water storage part 5 is a tank detachably provided below the main body case 2, and collects and stores the water generated by the dehumidifying action of the dehumidifying function part 6.

[0018] The dehumidifying function part 6 has the function of sucking air from the suction port 3 into the main body case 2, dehumidifying it, and blowing it out from the air outlet 4. Details will be described later.

[0019] The safety function part 7 detects the abnormality when the abnormality described later occurs in the dehumidifying function part 6, and stops some operations of the dehumidifying function part 6. Details will be described later.

[0020] Subsequently, the detailed structure of the dehumidifying function part 6 will be described with reference to FIGS. 2 to 3. FIG. 2 is an exploded perspective view showing the schematic configuration of the dehumidifying device, and FIG. 3 is a schematic cross-sectional view of the dehumidifying device.

[0021] The dehumidifying function part 6 includes a dehumidifying means 9, a regeneration unit 10, a blower unit 11, and a blower passage 12.

[0022] The dehumidifying means 9 includes a dehumidifying rotor 13, a support frame 14, and a driving means 15.

[0023] The dehumidifying rotor 13 has a disk shape, and is provided so as to close an opening portion 14a of the support frame 14 to be described later between the back surface in the main body case 2 and the support frame 14. Further, the central axis of the dehumidifying rotor 13 in the disk shape is vertically installed horizontally and rotatably in the operating state of the dehumidifying device, and is rotated by the driving means 15. The dehumidifying rotor 13 includes a flat portion 16.

[0024] The flat section 16 is a circular surface provided to pass through the air passage 12, and comprises an upstream surface 16a of the flat section, which is the surface on the upstream side in the airflow direction of the air passage 12, and a downstream surface 16b of the flat section, which is the surface on the downstream side. The flat section 16 also comprises a moisture absorption section 17 and a moisture release section 18 that span the upstream surface 16a and the downstream surface 16b of the flat section.

[0025] The moisture-absorbing section 17 is located in a part of the flat section 16 that does not face the heat-generating section, which will be described later, and adsorbs moisture from the air passing through the air passage 12.

[0026] The moisture-releasing section 18 is located in the flat section 16 opposite the heat-generating section, which will be described later, and releases moisture into the air passing through it.

[0027] The support frame 14 is positioned to separate the front and rear sides of the main case 2, and has a circular opening 14a in its center.

[0028] The driving means 15 rotates the dehumidifying rotor 13, and in this embodiment, an electrically driven motor is used. As the driving means 15 rotates the dehumidifying rotor 13, the position of the flat surface 16, which belongs to the moisture absorption section 17 and the moisture release section 18, continues to change.

[0029] The regeneration unit 10 includes a circulating air passage 19, a heating element 20, a heat exchanger 21, and a circulating blower 22.

[0030] The circulating air passage 19 is an annular air passage through which air passes, connecting the circulating blower 22, the heat-generating section 20, the moisture-releasing section 18, and the heat exchanger 21 in that order.

[0031] The heating element 20 generates heat using an electric heating element and is located within the circulating air passage 19, facing the downstream surface 16b of the flat portion of the moisture release element 18. The heating element 20 generates heat when power is supplied from a power supply board, which will be described later, and heats the moisture release element 18, thereby releasing moisture from the moisture release element 18 toward the downstream side of the circulating air passage 19.

[0032] The heat exchanger 21 performs heat exchange between the air in the circulating air passage 19, which contains moisture released from the dehumidification section 18, and the air in the air supply passage 12. The heat exchanger 21 is positioned horizontally adjacent to the dehumidifying rotor 13 in the main body case 2.

[0033] The circulating fan 22 is installed between the rear of the main body case 2 and the support frame 14, and circulates air within the circulating air passage 19. In this invention, it is a sirocco fan.

[0034] The air blower 11 guides air from the intake port 3 to the outlet port 4, and in this invention, it is a sirocco fan.

[0035] The air passage 12 is an air passage that connects the intake port 3 and the outlet port 4, and includes a dehumidifying air passage 12a and a cooling air passage 12b.

[0036] The dehumidifying air passage 12a connects the intake port 3 of the main body case 2, the dehumidifying section 18, and the blowing section 11 in that order, and is an air passage leading to the outlet port 4. The air drawn in from the intake port 3 is dehumidified by the adsorption of moisture in the dehumidifying section 18.

[0037] The cooling air passage 12b connects the intake port 3 of the main body case 2, the heat exchanger 21, and the blower unit 11 in that order, and is an air passage leading to the outlet 4. The air drawn in from the intake port 3 cools the air in the circulating air passage that passes through the heat exchanger 21. The air that has passed through the dehumidifying air passage 12a and the cooling air passage 12b is mixed in the blower unit 11 and blown out of the main body case from the outlet 4.

[0038] Next, the configuration of the safety function unit 7 will be explained using Figures 4 to 7. Figure 4 is a cross-sectional view of the dehumidifier in an embodiment of the present invention, Figure 5 is a perspective cross-sectional view of the dehumidifier in an embodiment of the present invention, Figure 6 is a schematic diagram illustrating the safety function unit of the dehumidifier in an embodiment of the present invention, and Figure 7 is a cross-sectional view showing two cross-sections of the dehumidifier in an embodiment of the present invention.

[0039] The safety function unit 7 detects an abnormality in the dehumidification function unit 6 and stops the operation of a part of the dehumidification function unit 6. It comprises a power supply board (not shown), wiring (not shown), and a thermal fuse 23.

[0040] The power supply board supplies power to the dehumidification function unit 6, which then operates. When power supply from the power supply board stops, the dehumidification function unit 6 stops operating.

[0041] The wiring consists of conductive wires connecting the power supply board to the heat-generating section 20, and includes upstream wiring (not shown) connecting the power supply board to the thermal fuse 23, and downstream wiring (not shown) connecting the thermal fuse 23 to the heat-generating section 20.

[0042] The thermal fuse 23 is a conductive wire and connects the upstream and downstream wiring in a series circuit. The thermal fuse 23 faces the downstream surface 16b of the flat section and is located immediately downstream of the heat-generating section 20 in the rotational direction of the dehumidifying rotor 13. The thermal fuse 23 blows when its internal temperature reaches the blowing temperature. Further details will be described later.

[0043] The detailed operation of the dehumidification function unit 6 in the above configuration will now be explained.

[0044] Air from the indoor space, drawn into the dehumidifying air passage 12a from the intake port 3 by the blower unit 11, is dehumidified by the absorption of moisture by the moisture absorption unit 17. The dehumidified air is blown out into the indoor space from the outlet 4. The moisture absorbed in the moisture absorption unit 17 is moved to the moisture release unit 18 by the rotational drive of the dehumidifying rotor 13, and is released into the circulating air passage 19 by heating in the heat generating unit 20. The moisture-containing air released from the moisture release unit 18 is blown to the heat exchanger 21 by the circulating blower 22. In the heat exchanger 21, the air in the circulating air passage 19 passing through the heat exchanger 21 and the air in the cooling air passage 12b passing through the heat exchanger 21 exchange heat. At this time, the air in the circulating air passage 19 is cooled by the air in the cooling air passage 12b, causing condensation. The water generated by this condensation is collected and stored in the water storage unit 5. The heat exchanger 21 is cooled, and the air in the cooling air passage 12b, whose temperature has risen, is mixed with the air in the dehumidifying air passage 12a by the blower unit 11 and blown into the indoor space from the outlet 4. In this way, the air in the indoor space is dehumidified.

[0045] Incidentally, in the dehumidification function unit 6, organic matter contained in the indoor air drawn into the dehumidification air passage 12a from the intake port 3 by the blower unit 11 is adsorbed onto the flat surface 16 along with moisture by the moisture absorption unit 17. Furthermore, an abnormality is anticipated in which the rotation of the dehumidification rotor 13 slows down (rotation failure) due to a malfunction of the drive means 15. In the event of this abnormality, the time that the flat surface 16 passes through the heat-generating unit 20 becomes longer compared to when it is operating normally, and the temperature of the flat surface 16 becomes higher than when it is operating normally. In addition, as time passes since the occurrence of the abnormality, the temperature of the flat surface 16 continues to rise. At this time, the organic matter adsorbed on the flat surface 16 also continues to rise in temperature, and there is a possibility that combustion will occur when it reaches a predetermined combustion temperature, which is unsafe.

[0046] The detailed operation of the safety function unit 7 in the above configuration will now be explained.

[0047] As shown in Figure 5, the thermal fuse 23 is positioned opposite the downstream surface 16b of the flat section, so it comes into contact with the air that has passed through the flat section 16 in the dehumidifying air passage 12a (air after passing through the flat section). At this time, the internal temperature fluctuates depending on the temperature of the air after passing through the flat section. Specifically, if the temperature of the air after passing through the flat section is a first temperature, which is higher than the internal temperature of the thermal fuse 23, the internal temperature of the thermal fuse 23 rises and approaches the first temperature over time. When the internal temperature of the thermal fuse 23 reaches the melting temperature during the process of rising to the first temperature, the thermal fuse 23 melts. Since the thermal fuse 23 is connected to the upstream and downstream wiring in a series circuit, the wiring can no longer supply power from the power supply board to the heat-generating section 20, and the heat-generating section 20 stops operating. This makes it possible to stop the operation of the heat-generating section 20 in the event of an abnormality, thus avoiding unsafe conditions. Furthermore, the thermal fuse 23 is positioned immediately downstream of the heat-generating element 20 in the rotational direction of the flat section 16 to facilitate detection of temperature rise in the flat section 16 during abnormal conditions. The temperature rise of the flat section 16 is due to the heat-generating element 20, and the flat section 16 is cooled by the air in the dehumidifying air passage 12a that passes through it. Therefore, the temperature decreases the further downstream the flat section 16 is from the heat-generating element 20 in the rotational direction of the flat section 16. Consequently, at positions further downstream from the heat-generating element 20 in the rotational direction of the flat section 16, the temperature of the air after passing through the flat section is lower than at positions upstream of that position. In other words, the temperature difference between the normal and abnormal conditions of the air after passing through becomes smaller, and the time it takes to reach the melting temperature of the thermal fuse 23 increases. For these reasons, it is desirable to position the thermal fuse 23 immediately downstream of the heat-generating element 20 in the rotational direction of the flat section 16. The fuse temperature must be set such that the thermal fuse 23 melts due to air after passing through the flat section before the organic matter reaches its combustion temperature, and this can be appropriately determined by the implementer of the invention. In this embodiment, the fuse temperature is 169°C.

[0048] With the above configuration, the heat-generating unit 20 can be shut down in the event of an abnormality, thereby avoiding unsafe conditions.

[0049] As shown in Figures 4 to 6, the safety function unit 7 is further equipped with a shielding plate 24 to shorten the time it takes for the thermal fuse 23 to reach its melting temperature.

[0050] The shielding plate 24 is provided so as to face the downstream surface 16b of the flat section and is a fan-shaped plate. Specifically, it faces the position from the downstream end 25 of the heat-generating section (the downstream end of the dehumidifying rotor 13 of the heat-generating section 20 in the direction of rotation of the dehumidifying rotor 13 on the flat section 16) to the thermal fuse 23.

[0051] As mentioned above, at positions further downstream from the heating element 20 in the rotational direction of the flat section 16, the temperature of the air after passing through the flat section is lower than at positions upstream of that position. That is, the temperature difference of the air after passing through becomes smaller between normal and abnormal conditions, and the time it takes to reach the melting temperature of the thermal fuse 23 becomes longer. For the above reasons, it is considered desirable to install the thermal fuse 23 in contact with the downstream end 25 of the heating element. However, if the thermal fuse 23 is installed in contact with the downstream end 25 of the heating element, it will be directly affected by the heat from the heating element 20, and it is anticipated that it may melt even under normal conditions. Therefore, it is desirable to install it in a position that is not affected by the heat from the heating element 20, and is located as close as possible to the downstream side of the heating element 20. In this case, the temperature of the flat section 16 from the downstream end 25 of the heating element to the thermal fuse 23 decreases due to the passage of air in the dehumidifying air passage 12a.

[0052] In the above configuration, we will now explain the mechanism for shortening the time it takes for the thermal fuse 23 of the shielding plate 24 to reach its melting temperature.

[0053] The air blower 11 is located downstream of the dehumidifying rotor 13 in the dehumidifying air passage 12a, and the shielding plate 24 is provided between the flat section 16 and the air blower 11. Therefore, when the air blower 11 is operating, the shielding plate 24 on the flat section 16 faces the air passing through the dehumidifying air passage 12a is blocked by the shielding plate 24. Since the shielding plate 24 faces the position from the downstream end 25 of the heat-generating section to the thermal fuse 23, it blocks the passage of air at that position, thereby suppressing the decrease in the temperature of the air after passing through the flat section from the downstream end 25 of the heat-generating section to the thermal fuse 23. As a result, compared to the case where the shielding plate 24 is not provided, the thermal fuse 23 comes into contact with hotter air after passing through the flat section, thus shortening the time until the thermal fuse 23 reaches its melting temperature. With the above configuration, a dehumidifying device with improved safety can be provided. In order to block the passage of air, it is desirable that the distance between the shielding plate 24 and the downstream surface 16b of the flat section be as close as possible, but this can be appropriately determined by the implementer of the invention. In this embodiment, the distance between the shielding plate 24 and the downstream surface of the flat section is 3 mm.

[0054] As shown in Figure 6, the thermal fuse 23 comprises a fusible portion 23a and a connecting portion 23b.

[0055] The cut section 23a is the part that is cut when the dehumidifying rotor 13 reaches its cutting temperature.

[0056] The connection portion 23b extends from both ends of the cutting portion 23a and is connected to the upstream wiring 24a and the downstream wiring 24b, respectively.

[0057] Furthermore, it is desirable that the shielding plate 24 has a shape that blocks the passage of air from the downstream surface 16b of the flat section to the connecting section 23b without obstructing the passage of air from the downstream surface 16b of the flat section to the cutting section 23a.

[0058] With the above configuration, the air that is blocked from passing from the downstream surface 16b of the flat section to the connection section 23b comes into contact with the fuse section 23a. As a result, the fuse section 23a comes into contact with hotter air that has passed through the flat section, compared to when the passage of air to the connection section 23b is not blocked. This further shortens the time from the occurrence of an abnormality until the thermal fuse 23 blows, and provides a dehumidifier with even greater safety.

[0059] An example of a shape in which the shielding plate 24 does not obstruct the passage of air from the downstream surface 16b of the flat section to the cutting section 23a, but obstructs the passage of air from the downstream surface 16b of the flat section to the connecting section 23b, will be described.

[0060] As shown in Figure 6, the shielding plate 24 has a recess 27 that is recessed toward the upstream side in the direction of rotation from the downstream end 26 of the shielding plate, which is the downstream end in the direction of rotation of the dehumidifying rotor 13.

[0061] The recess 27 has a shape in which a cutting portion 23a is placed in the opening 27a formed by the recess, and connecting portions 23b are placed at both ends of the opening 27a, straddling the opening 27a in the recess 27.

[0062] With the above configuration, air can pass only through the opening 27a, thus blocking the passage of air from the downstream surface 16b of the flat section to the connecting section 23b without obstructing the passage of air from the downstream surface 16b of the flat section to the fussing section 23a. This further shortens the time from the occurrence of an abnormality until the thermal fuse 23 blows, thereby further improving the safety of the dehumidifier.

[0063] Figure 7 is a cross-sectional view showing two cross-sections of a dehumidifier according to an embodiment of the present invention.

[0064] As shown in Figure 7, the air blower unit 11 is provided between the rear of the main body case 2 and the support frame 14, and includes a fan motor 11a, a fan 11b, and a fan casing 11c.

[0065] The fan motor 11a is fixed to the fan casing 11c and rotates a rotating shaft (not shown) that extends horizontally. The rotating shaft of the fan motor 11a extends from the front to the rear of the main body case 2.

[0066] Fan 11b is a sirocco fan and is fixed to the rotation axis (not shown) of fan motor 11a.

[0067] The fan casing 11c is a casing that surrounds the fan motor 11a and the fan 11b, and is equipped with an outlet 29 and an intake port 28.

[0068] The discharge port 29 is located on the upper side of the main body case 2 of the fan casing 11c and is an opening for blowing out the air drawn into the fan casing 11c from the intake port 28 to the outlet port 4.

[0069] The intake port 28 is located on the front side of the main case 2 of the fan casing 11c and is an opening for drawing air into the fan casing 11c from the dehumidifying air passage 12a and the cooling air passage 12b. The intake port 28 is also located opposite the thermal fuse 23 in the direction of rotation of the dehumidifying rotor 13, on the downstream side. That is, as the air passing through the flat section 16 moves from the upstream surface 16a to the downstream surface 16b of the flat section, the intake port 28 is positioned to move from the upstream side to the downstream side in the direction of rotation of the dehumidifying rotor 13.

[0070] In the above configuration, it is preferable that the recess 27 of the shielding plate 24 further includes a ventilation space 30.

[0071] Figure 8 is a schematic diagram showing the airflow from the flat surface to the intake port. Figure 8(a) shows the airflow without a ventilation space, and Figure 8(b) shows the airflow with a ventilation space.

[0072] The ventilation space 30 is provided on the upstream side of the cutting section 23a in the direction of rotation of the dehumidifying rotor 13, and is a space through which air can pass after passing the flat section. The ventilation space 30 is opened from the downstream end of the recess 27 in the direction of rotation of the dehumidifying rotor 13 to allow air to pass through a predetermined ventilation distance after passing the flat section.

[0073] If the ventilation space 30 is not provided, the air passing through the flat section 16 moves from the upstream surface 16a to the downstream surface 16b of the flat section, moving from the upstream side to the downstream side in the rotational direction of the dehumidifying rotor 13. As a result, as shown in Figure 8(a), the air after passing through the flat section only contacts a portion of the downstream side of the melting section 23a in the rotational direction of the dehumidifying rotor 13. Therefore, it takes longer for the internal temperature to rise compared to when the air after passing through the flat section contacts the entire melting section 23a. On the other hand, as shown in Figure 8(b), if the recess 27 is equipped with a ventilation space 30, the air after passing through the flat section can contact the entire melting section 23a, thus shortening the time from the occurrence of an abnormality until the thermal fuse 23 blows. The predetermined ventilation distance of the ventilation space 30 is determined by the positional relationship between the recess 27 and the air intake 28, and can be appropriately determined by the implementer of the invention. [Industrial applicability]

[0074] This invention relates to a dehumidifying device, and is expected to be used as a dehumidifying device with improved safety. [Explanation of Symbols]

[0075] 1 Dehumidifier 2. Main unit case 3. Inlet 4 Air outlet 5. Water storage section 6 Dehumidification function section 7 Safety function section 8 louvers 9 Dehumidification means 10 Regeneration Units 11. Air blower 11a Fan motor 11b Fan 11c Fan Casing 12 Airflow passage 12a Dehumidifying air path 12b Cooling air passage 13 Dehumidifying Rotor 14 Support Frames 14a Opening 15 Driving means 16 Plane section 16a Upstream surface of flat section 16b Downstream surface of flat part 17 Moisture-absorbing part 18 Moisture-releasing section 19 Circulation air duct 20 Heat-generating part 21 Heat exchanger 22 Circulating blower 23 Thermal fuse 23a Cutting section 23b Connection section 24 Shield plate 25 Downstream end of the heating element 26 Downstream end of shield plate 27 recess 27a opening 28 Air intake 29 Discharge port 30 Ventilation space

Claims

1. A main body case having an intake port and an outlet port, A duct connecting the aforementioned intake port and the aforementioned outlet port, A blower that guides air from the intake port to the outlet port, A dehumidifying rotor that dehumidifies the air passing through the aforementioned air passage, A drive unit for rotating the dehumidifying rotor, A heating element that heats a portion of the dehumidifying rotor, The dehumidifying rotor includes a thermal fuse that melts when the temperature exceeds a predetermined level, The dehumidifying rotor has a flat section that passes through the air passage, The heating element and the thermal fuse face each other on the downstream surface of the planar portion, which is the downstream surface of the air passage in the planar portion. The aforementioned thermal fuse is In the aforementioned rotational direction, it is provided immediately downstream of the heating element, A dehumidifier equipped with a shielding plate that blocks the passage of air over the flat surface from the downstream end of the heat-generating section in the rotational direction to the thermal fuse.

2. The aforementioned thermal fuse is The cut portion is cut when the downstream surface of the flat portion reaches a predetermined temperature or higher, The cutting portion comprises connecting portions extending from both ends of the cutting portion, The aforementioned shielding plate is The dehumidifying device according to claim 1, which blocks the passage of air from the downstream surface of the flat portion to the connecting portion without blocking the passage of air from the downstream surface of the flat portion to the cutting portion.

3. The aforementioned shielding plate is The shielding plate is provided with a recess that extends from the downstream end in the rotational direction toward the upstream side in the rotational direction, The aforementioned connection part is The opening in the recess is straddled and connected to both ends of the opening, The aforementioned cut portion is The dehumidifying device according to claim 2, which is located at the opening and in contact with air from the downstream surface of the flat portion.

4. The aforementioned blower is When the air passing through the planar portion moves from the upstream side of the planar portion to the downstream surface of the planar portion, the following position is positioned in the rotational direction, moving from the upstream side to the downstream side. The aforementioned recess is The dehumidifying device according to claim 3, further comprising a ventilation space on the upstream side of the cutting portion in the rotational direction, through which air passing through the flat portion can pass.

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