Blower

Abstract

To provide an air blower capable of reducing decline in quantity of air flowing out from an outflow port to outside of a casing.SOLUTION: An air blower 1 includes: a casing 5 having an inflow port and an outflow port 4; a fan device 7 blowing air 2 sucked from the inflow port to the outflow port 4; and a switching part 15. The air blower has a first air course, a second air course 12 and a third air course 13. The fan device 7 includes one suction part and the other suction part 30 located on the side opposite to the one suction part. The first air course is communicated with the one suction part of the fan device 7 from the inflow port, and the second air course 12 is communicated with the other suction part 30 of the fan device 7 from the inflow port. The third air course 13 is branched from the first air course and communicated with the other suction part 30 of the fan device 7. The switching part 15 performs switching between flowing of the air 2 in the second air course 12 and flowing of the air 2 in the third air course 13.SELECTED DRAWING: Figure 10

Description

[Technical field]

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

[0002] Conventionally, as this type of blower, there is a blower 200 as shown in Figures 20 and 21. Figure 20 is a cross-sectional view of blower 200, showing a state switched to a deodorizing mode. Figure 21 is a cross-sectional view of blower 200, showing a state switched to a humidifying mode.

[0003] The blower device 200 has a main body 203 with an intake port 201 through which air 208 flows in and an exhaust port 202 through which air 208 flows out, a fan device 204 that blows the air 208 sucked in from the intake port 201 to the exhaust port 202, a deodorizing filter 205 that deodorizes the air 208 sucked in from the intake port 201, a humidifying filter 206 that humidifies the air 208 sucked in from the intake port 201, and a shutter 207.

[0004] Deodorizing filter 205 is provided above humidifying filter 206. Shutter 207 is provided between deodorizing filter 205 and humidifying filter 206 and fan device 204 so as to be vertically movable, and closes deodorizing filter 205 and humidifying filter 206 alternately.

[0005] According to this, when blower device 200 is driven and switched to the deodorizing mode, as shown in Fig. 20, shutter 207 descends to close humidifying filter 206. Therefore, air 208 sucked into main body 203 from intake port 201 passes through deodorizing filter 205 and is blown out of blower device 200 from exhaust port 202.

[0006] 21, when the mode is switched to the humidification mode, shutter 207 rises to close deodorizing filter 205. Therefore, air 208 sucked into main body 203 from intake port 201 passes through humidification filter 206 and is blown out of blower device 200 from air outlet 202. The above-mentioned blower device 200 is described in Patent Document 1 below. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 5520901 Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the above-mentioned conventional type, when the operating state is switched to the deodorizing mode, as shown in FIG. 20, the air path for air 208 flowing through humidifying filter 206 is completely closed and only the air path for air 208 flowing through deodorizing filter 205 is open, which may result in a significant reduction in the amount of air blown to the outside from air outlet 202.

[0009] Similarly, when the operating state is switched to the humidification mode, as shown in FIG. 21, the air path for air 208 flowing through deodorizing filter 205 is completely closed, and only the air path for air 208 flowing through humidifying filter 206 is open, which may result in a significant reduction in the amount of air blown to the outside from air outlet 202.

[0010] An object of the present invention is to provide a blower device capable of reducing a decrease in the amount of air (blow rate) flowing out of a housing from an outlet. [Means for solving the problem]

[0011] According to one aspect of the present invention, a blower device includes a housing having an inlet through which air flows in and an outlet through which air flows out, a fan device that blows air sucked in from the inlet to the outlet, and a switching unit, and has a first air passage, a second air passage, and a third air passage, the fan device having one suction section and the other suction section located opposite the one suction section, the first air passage communicating from the inlet to the one suction section of the fan device, the second air passage communicating from the inlet to the other suction section of the fan device, the third air passage branching off from the first air passage and communicating with the other suction section of the fan device, and the switching unit switching between air flowing through the second air passage and air flowing through the third air passage. Effect of the Invention

[0012] As described above, according to the present invention, when the blower device is driven and operated by switching the switching unit so that air flows through the second air duct, air sucked in from the inlet passes through the first air duct and is sucked into the fan device from one suction part of the fan device, and also passes through the second air duct and is sucked into the fan device from the other suction part of the fan device, and flows out from the fan device through the outlet to the outside of the housing.

[0013] In addition, when the switching unit is switched to operate so that air flows through the third air duct, air sucked in from the inlet passes through the first air duct and is sucked into the fan device from one suction part of the fan device, and then branches off from the first air duct and passes through the third air duct and is sucked into the fan device from the other suction part of the fan device, and flows out from the fan device through the outlet to the outside of the housing.

[0014] As a result, regardless of the operating state, air sucked in from the inlet is sucked into the fan device from both one suction portion of the fan device and the other suction portion, thereby reducing the reduction in the volume of air (blowing volume) flowing out from the outlet to the outside of the housing. [Brief description of the drawings]

[0015] [Figure 1]1 is a cross-sectional view of a blower according to a first embodiment of the present invention, showing a state in which the mode is switched to humidification-on mode. [Diagram 2] FIG. 2 is a partially cutaway side view of the air blower according to the first embodiment, showing a state in which the air blower is switched to a humidification-on mode. [Diagram 3] 3 is a view showing a VV cross section of the blower device shown in FIG. 2. [Figure 4] 2 is a perspective view of a damper of the blower of the first embodiment, as viewed from the fan device side. FIG. [Diagram 5] 2 is a perspective view of a damper of the blower of the first embodiment, as viewed from the front plate side of the housing. FIG. [Figure 6] 5 is a view of the damper of the blower shown in FIG. 4, seen in the direction of the arrow W. [Figure 7] 7 is a view showing a VV cross section of the damper of the blower shown in FIG. 6. FIG. [Figure 8] FIG. 2 is a cross-sectional view of the air blower according to the first embodiment, showing a state in which the air blower is switched to a humidification-off mode. [Figure 9] FIG. 2 is a partially cutaway side view of the air blower of the first embodiment, showing a state switched to a humidification-off mode. [Figure 10] 10 is a view showing a VV cross section of the blower shown in FIG. 9. FIG. [Figure 11] 9 is a partially enlarged cross-sectional view of the blower device shown in FIG. 8. [Figure 12] FIG. 11 is a cross-sectional view of a blower according to a second embodiment of the present invention, showing a state switched to a humidification-on mode. [Figure 13] FIG. 11 is a cross-sectional view of a blower device according to a second embodiment, showing a state in which the mode is switched to humidification-off mode. [Figure 14] FIG. 11 is a cross-sectional view of a blower according to a third embodiment of the present invention, showing a state switched to a humidification-off mode. [Figure 15] FIG. 11 is a partially cutaway side view of a blower device according to a third embodiment, showing a state in which the mode is switched to humidification-off mode. [Figure 16] 16 is a view showing a VV cross section of the blower shown in FIG. 15. FIG. [Figure 17] FIG. 11 is a cross-sectional view of a blower according to a third embodiment, showing a state in which the mode is switched to humidification on mode. [Figure 18] FIG. 11 is a partially cutaway side view of a blower device according to a third embodiment, showing a state in which the mode is switched to humidification on mode. [Figure 19] 19 is a view showing a VV cross section of the blower shown in FIG. 18. FIG. [Figure 20] FIG. 1 is a cross-sectional view of a conventional blower device, showing a state in which the device is switched to a deodorizing mode. [Figure 21] FIG. 1 is a cross-sectional view of a conventional blower device, showing a state switched to a humidification mode. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0017] (Embodiment 1) First, a first embodiment of a blower 1 according to the present invention will be described with reference to Fig. 1 to Fig. 3. Fig. 1 is a cross-sectional view of the blower 1 in this embodiment, showing a state switched to the humidification-on mode. Fig. 2 is a partially cutaway side view of the blower 1, showing a state switched to the humidification-on mode. Fig. 3 is a VV cross-sectional view of the blower 1 shown in Fig. 2.

[0018] As shown in Figures 1 to 3, the air blower 1 is placed and used, for example, indoors, has a dehumidification function and a humidification function, and is switchable between a humidification on mode in which a humidification operation is performed to humidify the air and a humidification off mode in which a humidification operation is not performed.

[0019] The blower 1 includes a housing 5 having an inlet 3 through which the air 2 flows in and an outlet 4 (blowout port) through which the air 2 flows out, a fan device 7 that blows the air 2 sucked in from the inlet 3 to the outlet 4, and a damper 15 (an example of a switching section). The blower 1 also has a dehumidification air passage 11 (an example of a first air passage), a humidification air passage 12 (an example of a second air passage), an auxiliary air passage 13 (an example of a third air passage), and an outlet air passage 14.

[0020] The housing 5 is a box-shaped case having a front plate 17, a rear plate 18, a pair of left and right side plates 19, 20, an upper cover 21, and a bottom 22. The inlet 3 is formed in the rear plate 18, and the outlet 4 is formed in the upper cover 21. In addition, the rear plate 18 is provided with an air cleaning filter 23 arranged inside the inlet 3.

[0021] An operation unit 24 is provided on the upper cover portion 21, and the operation unit 24 is provided with a power switch, an operation changeover switch for switching between a humidification on mode and a humidification off mode, and the like.

[0022] In the first embodiment, the fan device 7 is, for example, a double-suction type sirocco fan. The fan device 7 has a casing 26, a rotatable fan 27 arranged in the casing 26, an electric motor 28 such as a motor for rotating the fan 27, one suction port 29 (an example of one suction section) and the other suction port 30 (an example of the other suction section) formed in the casing 26, and a delivery port 31. Of these, one suction port 29 opens on the rear surface of the casing 26, and the other suction port 30 opens on the front surface of the casing 26 and is located on the opposite side to the one suction port 29. The delivery port 31 opens on the top surface of the casing 26.

[0023] The dehumidifying air passage 11 communicates from the inlet 3 to one of the suction ports 29 of the fan device 7. A dehumidifying section 34 is disposed between the inlet 3 and one of the suction ports 29. That is, the dehumidifying air passage 11 has the dehumidifying section 34. The dehumidifying section 34 has a refrigeration cycle that dehumidifies the air 2 that flows in from the inlet 3. The refrigeration cycle has a circulation path that annularly connects a cooling section 35, a heat dissipation section 36, a compression section (not shown), and an expansion section (not shown).

[0024] The cooling section 35 includes an evaporator, the heat dissipation section 36 includes a condenser, the compression section includes a compressor, and the expansion section includes a capillary tube. In the refrigeration cycle, the refrigerant circulates through the circulation path in the order of the compression section, the heat dissipation section 36, the expansion section, and the cooling section 35, thereby suppressing the temperature rise of the cooling section 35, and the air 2 flowing through the dehumidification air passage 11 is cooled when passing through the cooling section 35, and the moisture contained in the air 2 is condensed, resulting in the air 2 being dehumidified. In addition, the heat dissipation section 36 exchanges heat between the air 2 that has passed through the cooling section 35 and the refrigerant, and as a result, the air 2 that has passed through the cooling section 35 receives heat from the refrigerant and is warmed.

[0025] The humidified air passage 12 communicates from the inlet 3 to the other suction port 30 of the fan device 7. A humidifier 39 is disposed between the inlet 3 and the other suction port 30. The humidified air passage 12 is formed below the dehumidified air passage 11. The humidifier 39 humidifies the air 2 that flows in from the inlet 3, and has a humidifier filter 40 disposed below the dehumidifier 34 and a tank (not shown). The humidifier filter 40 absorbs water in the tank, and the air 2 is humidified by passing through the humidifier filter 40.

[0026] Auxiliary air duct 13 branches off from dehumidification air duct 11 , does not pass through humidification section 39 , and goes around the outside of casing 26 of fan device 7 to communicate with the other suction port 30 . The dehumidification air passage 11 and the auxiliary air passage 13 are separated from the humidification air passage 12 by one partition member 42 and the other partition member 43 provided in the housing 5 .

[0027] One of these partition members 42 has a plate body 42a extending in the front-rear direction and a plate body 42b provided in front of the plate body 42a and adjacent to the outer periphery of the damper 15. The other partition member 43 has a plate body 43a extending in the front-rear direction and a plate body 43b provided in front of the plate body 43a and adjacent to the outer periphery of the damper 15.

[0028] 3, the space between the lower end of plate 42b of one partition member 42 and the lower end of plate 43b of the other partition member 43 is formed as part of humidified air passage 12. Also, the space between the upper end of plate 42b of one partition member 42 and the upper end of plate 43b of the other partition member 43 is formed as part of auxiliary air passage 13, as shown in FIG. The outlet airflow path 14 communicates from the outlet 31 of the fan device 7 to the outlet 4 , and is formed within the duct 45 .

[0029] The damper 15 is a rotary switching device that switches between air 2 flowing through the humidified air duct 12 and air 2 flowing through the auxiliary air duct 13, and is disposed between the casing 26 of the fan unit 7 and the front panel portion 17 of the housing 5, and is supported on the front panel portion 17 via a support shaft 54.

[0030] FIG. 4 is a perspective view of the damper 15 as viewed from the fan device 7 side. FIG. 5 is a perspective view of the damper 15 as viewed from the front plate portion 17 side of the housing 5. FIG. 6 is a view of the damper 15 as viewed in the direction of the arrow W shown in FIG. 4. FIG. 7 is a view showing a VV cross section of the damper 15 shown in FIG. 6. As shown in FIGS. 4 to 7, the damper 15 has a substantially disk-shaped second shielding portion 49, a first shielding portion 50 provided on the outer periphery of the second shielding portion 49, and a rotation drive device 51 such as a motor that rotates the damper 15 between a first switching position A (see FIG. 3) and a second switching position B (see FIG. 10).

[0031] The first shielding part 50 has an arc shape that is nearly a semicircle (180°) when viewed from the direction of the rotation axis 52 of the damper 15 (i.e., the front-rear direction). In other words, the first shielding part 50 is an arc-shaped member. The second shielding part 49 has a circular recess 53 in the center, and the rotation drive device 51 is housed in the recess 53. As shown in FIGS. 1 to 3, when damper 15 rotates to first switch position A, first shielding portion 50 opens humidified air passage 12 and closes auxiliary air passage 13.

[0032] Fig. 8 is a cross-sectional view of the blower 1, showing a state switched to the humidification-off mode. Fig. 9 is a partially cutaway side view of the blower 1, showing a state switched to the humidification-off mode. Fig. 10 is a VV cross-sectional view of the blower 1 shown in Fig. 9. As shown in FIGS. 8 to 10, when damper 15 rotates to second switching position B, first shielding portion 50 closes humidified air passage 12 and opens auxiliary air passage 13.

[0033] Furthermore, the second shielding portion 49 faces the other suction port 30 in the direction of the rotational axis of the fan 27 (i.e., the front-to-rear direction), and when the humidified air duct 12 is closed by the first shielding portion 50 as shown in Figures 8 to 11, it prevents the air 2 flowing through the humidified air duct 12 from being sucked into the other suction port 30 through the gap 56 (see Figure 11) between the first shielding portion 50 and the inner surface of the front panel portion 17 of the housing 5.

[0034] The operation of the blower 1 will now be described. When it is desired to humidify the air in a room, the power switch of the operation section 24 of the blower 1 is turned on, and the operation changeover switch is operated to switch to the humidification on mode. As a result, the electric motor 28 of the fan unit 7 is driven to rotate the fan 27, and the rotary drive unit 51 is driven to rotate the damper 15 to the first switching position A as shown in Figures 1 to 3, and the first shielding portion 50 opens the humidified air passage 12 and closes the auxiliary air passage 13.

[0035] As a result, the air 2 sucked in from the inlet 3 passes through the air cleaning filter 23, at which time foreign matter such as dust in the air 2 is removed. A part of the air 2 that has passed through the air cleaning filter 23 flows through the dehumidification air duct 11, is sucked into the casing 26 from one suction port 29 of the fan device 7, flows through the outlet air duct 14, and flows out from the air blower 1 through the outlet port 4. At this time, since the refrigeration cycle of the dehumidification section 34 is stopped operating, the air 2 flowing through the dehumidification air duct 11 is not dehumidified.

[0036] The remaining air 2 that has passed through the air purification filter 23 flows through the humidifying air duct 12 and is humidified by the humidifying filter 40. Thereafter, the air 2 is sucked into the casing 26 through the other intake port 30 of the fan device 7, flows through the exhaust air duct 14, and flows out of the blower device 1 through the outlet port 4.

[0037] At this time, as shown in Figure 3, the first shielding portion 50 of the damper 15 closes the auxiliary air duct 13, thereby preventing the air 2 that branches off from the dehumidification air duct 11 and flows into the auxiliary air duct 13 from being sucked into the casing 26 through the other suction port 30 of the fan unit 7. As a result, the humidified air 2 is supplied to the outside of the blower 1 through the outlet 4 .

[0038] When it is desired to dehumidify the air in the room, the operation changeover switch is operated to change over to the humidification off mode, whereby the rotary drive device 51 is driven to rotate the damper 15 to the second changeover position B as shown in Figs. 8 to 10, and the first shielding part 50 closes the humidification air passage 12 and opens the auxiliary air passage 13.

[0039] As a result, the air 2 sucked in from the inlet 3 passes through the air cleaning filter 23, at which point foreign matter such as dust in the air 2 is removed. A portion of the air 2 that has passed through the air cleaning filter 23 flows through the dehumidification air duct 11, is sucked into the casing 26 from one of the suction ports 29 of the fan device 7, flows through the outlet air duct 14, and flows out of the blower device 1 from the outlet port 4. At this time, since the refrigeration cycle of the dehumidification section 34 is operating, the air 2 flowing through the dehumidification air duct 11 is dehumidified and sucked into the casing 26 from one of the suction ports 29.

[0040] In addition, the remaining air 2 that has passed through the air purification filter 23 flows into the humidified air duct 12, but because the first shielding portion 50 of the damper 15 closes the humidified air duct 12, it does not flow into the casing 26 from the other suction port 30 of the fan device 7.

[0041] At this time, since the first shielding portion 50 of the damper 15 opens the auxiliary air duct 13, the air 2 that branches off from the dehumidification air duct 11 and flows into the auxiliary air duct 13 passes through the auxiliary air duct 13, goes around the outside of the fan device 7, and is sucked into the casing 26 from the other suction port 30 of the fan device 7. As a result, the dehumidified air 2 is supplied to the outside of the blower device 1 through the outlet 4 .

[0042] As described above, whether the operating state is the humidification on mode (see Figures 1 to 3) or the humidification off mode (see Figures 8 to 10), the air 2 sucked in through the inlet 3 is sucked into the fan device 7 through both the suction port 29 on one side and the suction port 30 on the other side of the fan device 7, thereby reducing the reduction in the air volume (blowing volume) of the air 2 flowing out from the outlet 4 to the outside of the blower device 1.

[0043] 8 to 10, in the humidification-off mode, first shielding portion 50 of damper 15 closes humidified air passage 12, but at this time, as shown in Fig. 11, second shielding portion 49 prevents air 2 flowing through humidified air passage 12 from being sucked into the other suction port 30 through gap 56 between first shielding portion 50 and front panel portion 17. This makes it possible to prevent humidified air 2 from entering casing 26 of fan device 7 from humidified air passage 12 through gap 56.

[0044] In the above-mentioned first embodiment, damper 15 is rotated to first switching position A as shown in Fig. 3, whereby first shielding portion 50 opens humidified air passage 12 and closes auxiliary air passage 13, and damper 15 is rotated to second switching position B as shown in Fig. 10, whereby first shielding portion 50 closes humidified air passage 12 and opens auxiliary air passage 13, but damper 15 may be rotated to an intermediate position between first switching position A and second switching position B to adjust the opening area of ​​humidified air passage 12 and the opening area of ​​auxiliary air passage 13. For example, by widening the opening area of ​​humidified air passage 12 and narrowing the opening area of ​​auxiliary air passage 13, the humidity of air 2 supplied from outlet 4 to the outside of blower 1 is increased. Conversely, by narrowing the open area of ​​humidified air passage 12 and widening the open area of ​​auxiliary air passage 13, the humidity of air 2 supplied to the outside of blower 1 from outlet 4 decreases. This makes it possible to adjust the humidity of air 2 supplied to the outside of blower 1 from outlet 4 while keeping the rotation speed of fan 27 constant. Note that the rotation speed of fan 27 may be adjusted while adjusting the rotation position of damper 15.

[0045] Here, in the above-mentioned first embodiment, when the mode is switched to the humidification-on mode, the operation of the refrigeration cycle of the dehumidification section 34 is stopped, but the refrigeration cycle may be operated to dehumidify the air 2 flowing through the dehumidification air passage 11.

[0046] (Embodiment 2) In the above-described embodiment 1, a rotating damper 15 is used, but the present invention is not limited to a rotating type, and below, a blower 1 according to embodiment 2 of the present invention will be described with reference to Figs. 12 and 13. Note that the blower 1 of embodiment 2 differs from the blower 1 of embodiment 1 in that an oscillating damper 70 is used. Hereinafter, the differences between embodiment 2 and embodiment 1 will be mainly described.

[0047] Fig. 12 is a cross-sectional view of the air blower 1 of this embodiment, showing a state switched to the humidification-on mode, and Fig. 13 is a cross-sectional view of the air blower 1, showing a state switched to the humidification-off mode.

[0048] As shown in Figures 12 and 13, the damper 70 is an oscillating switching device that switches between air 2 flowing through the humidified air duct 12 and air 2 flowing through the auxiliary air duct 13, and has a shielding plate 72 that can swing between a first switching position A and a second switching position B around a support shaft 71, and a swing drive device (not shown) such as a motor that swings the shielding plate 72.

[0049] The operation of the blower 1 will now be described. When the mode is switched to the humidification-on mode, as shown in FIG. 12, the swing drive device is driven to swing the shielding plate 72 of the damper 70 to the first switching position A, so that the shielding plate 72 opens the humidification air passage 12 and closes the auxiliary air passage 13.

[0050] As a result, a portion of the air 2 that has been sucked in through the inlet 3 and passed through the air cleaning filter 23 flows through the dehumidification air duct 11, is sucked into the casing 26 through one of the suction ports 29 of the fan device 7, flows through the outlet air duct 14, and flows out from the air blower 1 through the outlet port 4. At this time, since the refrigeration cycle of the dehumidification section 34 is stopped, the air 2 flowing through the dehumidification air duct 11 is not dehumidified.

[0051] The remaining air 2 that has passed through the air purification filter 23 flows through the humidifying air duct 12 and is humidified by the humidifying filter 40. Thereafter, the air 2 is sucked into the casing 26 through the other intake port 30 of the fan device 7, flows through the exhaust air duct 14, and flows out of the blower device 1 through the outlet port 4.

[0052] At this time, the shielding plate 72 of the damper 70 closes the auxiliary air passage 13, so that the air 2 that branches off from the dehumidification air passage 11 and flows into the auxiliary air passage 13 can be prevented from being sucked into the casing 26 through the other suction port 30 of the fan device 7. As a result, the humidified air 2 is supplied to the outside of the blower 1 through the outlet 4 .

[0053] In addition, when switching to the humidification off mode, as shown in Figure 13, the swing drive device is driven to swing the shielding plate 72 of the damper 70 to the second switching position B, and the shielding plate 72 closes the humidification air passage 12 and opens the auxiliary air passage 13.

[0054] As a result, a portion of the air 2 that has been sucked in through the inlet 3 and passed through the air cleaning filter 23 flows through the dehumidification air duct 11, is sucked into the casing 26 through one of the suction ports 29 of the fan device 7, flows through the outlet air duct 14, and flows out of the blower device 1 through the outlet port 4. At this time, since the refrigeration cycle of the dehumidification section 34 is in operation, the air 2 flowing through the dehumidification air duct 11 is dehumidified and is sucked into the casing 26 through one of the suction ports 29.

[0055] In addition, the remainder of the air 2 that has passed through the air purification filter 23 flows into the humidified air duct 12, but because the shielding plate 72 of the damper 70 closes the humidified air duct 12, it does not flow into the casing 26 from the other suction port 30 of the fan device 7.

[0056] At this time, since the shielding plate 72 of the damper 70 opens the auxiliary air passage 13, the air 2 that branches off from the dehumidification air passage 11 and flows into the auxiliary air passage 13 passes through the auxiliary air passage 13, goes around the outside of the fan device 7, and is sucked into the casing 26 from the other suction port 30 of the fan device 7. As a result, the dehumidified air 2 is supplied to the outside of the blower device 1 through the outlet 4 .

[0057] As described above, regardless of whether the operating state is the humidification on mode (see Figure 12) or the humidification off mode (see Figure 13), the air 2 sucked in through the inlet 3 is sucked into the fan device 7 through both the suction port 29 on one side and the suction port 30 on the other side of the fan device 7, thereby reducing the reduction in the air volume (blowing volume) of the air 2 flowing out from the outlet 4 to the outside of the blower device 1.

[0058] In the above-described second embodiment, when the mode is switched to the humidification-on mode, the operation of the refrigeration cycle of the dehumidification section 34 is stopped, but the refrigeration cycle may be operated to dehumidify the air 2 flowing through the dehumidification air passage 11.

[0059] (Embodiment 3) In the blower 1 of the above-mentioned embodiment 1 and embodiment 2, a double-suction type fan device 7 is used, but in the blower 1 of embodiment 3 described below, as shown in Figures 14 to 19, a single-suction type fan device 90 is used, and in this respect, the blower 1 differs from the blower 1 of embodiment 1 and embodiment 2. In the following, the differences between embodiment 3 and embodiment 1 will mainly be described.

[0060] FIG. 14 is a cross-sectional view of the blower 1 of this embodiment, showing a state switched to the humidification-off mode. FIG. 15 is a partially cutaway side view of the blower 1, showing a state switched to the humidification-off mode. FIG. 16 is a diagram showing a VV cross-section of the blower 1 shown in FIG. 15. FIG. 17 is a cross-sectional view of the blower 1, showing a state switched to the humidification-on mode. FIG. 18 is a partially cutaway side view of the blower 1, showing a state switched to the humidification-on mode. FIG. 19 is a diagram showing a VV cross-section of the blower 1 shown in FIG. 18.

[0061] Inside the housing 5, there are provided a fan device 90, a dehumidification air passage 91 (an example of a first air passage), a humidification air passage 12 (an example of a second air passage), an exhaust air passage 14, a damper 15, and the like.

[0062] The fan device 90 has a casing 26, a fan 27, an electric motor 28, an inlet 92 (an example of an inlet portion) formed in the casing 26, and a delivery outlet 31. The inlet 92 opens to the front surface of the casing 26.

[0063] 14 to 16, dehumidification airflow duct 91 is an airflow duct corresponding to auxiliary airflow duct 13 in the above-described first embodiment, and flows from inlet 3 around the outer side of casing 26 of fan device 7 without passing through humidifier 39 (described later), and communicates with suction port 92. In dehumidification airflow duct 91, dehumidifier 34 is disposed between inlet 3 and fan device 7.

[0064] 17 to 19, humidification air passage 12 is formed below dehumidification air passage 91, and communicates with air inlet 3 to air inlet 92 of fan device 7. In humidification air passage 12, humidification section 39 is disposed between air inlet 3 and air inlet 92. Humidification section 39 has a humidification filter 40 and a tank disposed below dehumidification section 34. The dehumidification air passage 91 and the humidification air passage 12 are partitioned by one partition member 42 and the other partition member 43 provided in the housing 5 . The outlet airflow path 14 communicates from the outlet 31 of the fan device 7 to the outlet 4 , and is formed within the duct 45 .

[0065] Damper 15 is a rotary switching device that switches between flowing of air 2 through humidification air duct 12 and flowing of air 2 through dehumidification air duct 91, and is disposed between casing 26 of fan device 7 and front plate portion 17 of housing 5, and is supported on front plate portion 17 via a support shaft 54. Damper 15 has a first shielding portion 50, a second shielding portion 49, and a rotary drive device 51 such as a motor that rotates damper 15 between a first switching position A and a second switching position B.

[0066] 16, when damper 15 is rotated to second switching position B, first shielding portion 50 closes humidified air passage 12 and opens dehumidified air passage 91. Also, as shown in Fig. 19, when damper 15 is rotated to first switching position A, first shielding portion 50 opens humidified air passage 12 and closes dehumidified air passage 91.

[0067] A gap is formed between second shielding portion 49 and the inner surface of front plate portion 17. Second shielding portion 49 faces suction port 92 in the direction of the rotation axis of fan 27 (i.e., the front-rear direction). As shown in Fig. 14, when first shielding portion 50 closes humidified air passage 12, second shielding portion 49 prevents air 2 flowing through humidified air passage 12 from being sucked into suction port 92 through gap 56 between first shielding portion 50 and the inner surface of front plate portion 17 of housing 5.

[0068] The operation of the blower 1 will now be described. When switching to the humidification off mode, as shown in Figures 14 to 16, the rotary drive device 51 is driven to rotate the damper 15 to the second switching position B, and the first shielding portion 50 closes the humidification air passage 12 and opens the dehumidification air passage 91.

[0069] As a result, air 2 sucked in from inlet 3 passes through air cleaning filter 23, flows through dehumidification air duct 91, goes around the outside of fan device 7, is sucked into casing 26 from suction port 92 of fan device 7, flows through outlet air duct 14, and flows out from outlet 4 to the outside of blower device 1. At this time, since the refrigeration cycle of dehumidification section 34 is operating, air 2 flowing through dehumidification air duct 91 is dehumidified and is sucked into casing 26 from suction port 92.

[0070] In addition, since the first shielding portion 50 of the damper 15 closes the humidified air passage 12, the humidified air 2 in the humidified air passage 12 can be prevented from being sucked into the casing 26 through the suction port 92 of the fan device 7. As a result, the dehumidified air 2 is supplied to the outside of the blower 1 through the outlet 4 .

[0071] Furthermore, when switching to the humidification on mode, as shown in Figures 17 to 19, the rotary drive device 51 is driven to rotate the damper 15 to the first switching position A, and the first shielding portion 50 opens the humidification air passage 12 and closes the dehumidification air passage 91.

[0072] As a result, the air 2 sucked in from the inlet 3 passes through the air purification filter 23, flows through the humidifying air duct 12, and is humidified by the humidifying filter 40. Thereafter, the air 2 is sucked into the casing 26 from the intake port 92 of the fan device 7, flows through the exhaust air duct 14, and flows out from the outlet 4 to the outside of the blower device 1.

[0073] At this time, since the first shielding portion 50 of the damper 15 closes the dehumidification airflow duct 91, the air 2 in the dehumidification airflow duct 91 can be prevented from being sucked into the casing 26 through the suction port 92 of the fan device 7. As a result, the humidified air 2 is supplied to the outside of the blower 1 through the outlet 4 .

[0074] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above embodiments, and can be implemented in various forms without departing from the spirit of the present invention. The drawings are mainly schematic illustrations of each component for ease of understanding, and the thickness, length, number, spacing, etc. of each component shown in the drawings are different from the actual ones due to the convenience of drawing. In addition, the material, shape, dimensions, etc. of each component shown in the above embodiments are merely examples and are not particularly limited, and various modifications are possible within a range that does not substantially deviate from the configuration of the present invention.

[0075] For example, the dehumidifying section 34 is disposed in the dehumidifying air duct 11. However, the dehumidifying section 34 does not have to be disposed in the dehumidifying air duct 11. In other words, the blower device 1 does not have to include the dehumidifying section 34. [Industrial Applicability]

[0076] INDUSTRIAL APPLICABILITY The present invention provides a blower device and has industrial applicability. [Explanation of symbols]

[0077] 1. Blower 2. Air 3 Inlet 4 Outlet 5. Cabinet 7 Fan Unit 12 Humidification air path (second air path) 13 Auxiliary air duct (3rd air duct) 15,70 Damper (switching part) 26 Casing 27 Fans 29 One suction port (one suction part) 30 Other suction port (other suction part) 39 Humidification unit 49 Second shielding part 50 1st shielding part 52 Rotation axis center 56 Gap A 1st switching position B 2nd switching position

Claims

1. a housing having an inlet through which air flows in and an outlet through which air flows out; a fan device that blows air drawn in from the inlet to the outlet; Switching section and Equipped with A first air passage, a second air passage, and a third air passage are provided. The fan device has one suction portion and another suction portion located on the opposite side of the one suction portion, the first air passage communicates from the inlet to the one suction portion of the fan device; the second air passage communicates from the inlet to the other suction portion of the fan device; the third air passage is branched off from the first air passage and communicates with the other suction portion of the fan device; The switching unit switches between flowing the air through the second air passage and flowing the air through the third air passage, The fan device includes a casing and a rotatable fan disposed within the casing. the third air passage is in communication with the other suction portion through a side of the casing from the first air passage, The switching unit is rotatable between a first switching position where the second air passage is opened and the third air passage is closed, and a second switching position where the second air passage is closed and the third air passage is opened.

2. A humidifying unit that humidifies the air flowing in from the inlet is further provided, The humidifying unit is disposed in the second air passage, The blower device according to claim 1 , wherein the third air passage does not pass through the humidifier, but bypasses the fan device and communicates with the other suction portion.

3. The blower device according to claim 1 or 2, wherein the switching unit includes a first shielding unit that alternately opens and closes the second air passage and the third air passage.

4. the switching unit has a second shielding unit facing the other suction unit in a direction of a rotation axis of the fan device, The blower device according to claim 3, wherein when the second air passage is closed by the first shielding portion, the second shielding portion prevents air flowing through the second air passage from being sucked into the other suction portion through a gap between the first shielding portion and an inner surface of the housing.

5. The second shielding portion is a substantially disk-shaped member, The blower device according to claim 4 , wherein the first shielding portion is an arc-shaped member provided on an outer periphery of the second shielding portion.

6. A housing having an inlet through which air flows in and an outlet through which air flows out; a fan device that blows air drawn in from the inlet to the outlet; Switching section and Equipped with A first air passage, a second air passage, and a third air passage are provided. The fan device has one suction portion and another suction portion located on the opposite side of the one suction portion, the first air passage communicates from the inlet to the one suction portion of the fan device; the second air passage communicates from the inlet to the other suction portion of the fan device; the third air passage is branched off from the first air passage and communicates with the other suction portion of the fan device; The switching unit switches between flowing the air through the second air passage and flowing the air through the third air passage, the switching unit has a first shielding unit that alternately opens and closes the second air passage and the third air passage, the switching unit has a second shielding unit facing the other suction unit in a direction of a rotation axis of the fan device, A blower device in which, when the second air passage is closed by the first shielding portion, the second shielding portion prevents air flowing through the second air passage from being sucked into the other suction portion through the gap between the first shielding portion and the inner surface of the housing.

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