Ventilation device

Abstract

To provide a ventilation device capable of widely blowing out mixed air of outdoor air and indoor air while suppressing blowing-out strength.SOLUTION: A device body 1 of a ventilation device includes: an outside air introduction port 11 for introducing outdoor air; an inside air introduction port 35 for introducing indoor air; and a blowout port 33 for blowing out mixed air of the outdoor air and the indoor air. A fan 40 accommodated in the device body 1 sucks the outdoor air from the outside air introduction port 11 and the indoor air from the inside air introduction port 35 and discharges the mixed air to the blowout port 33. The blowout port 33 is formed to be wide in a longitudinal direction of the device body 1 from a fan discharge port 46. An air blowing passage 50x for guiding the mixed air from the fan discharge port 46 to the blowout port 33 is provided. The air blowing passage 50x includes direction change parts 55, 57 for changing an air blowing direction.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a ventilation device that takes in outdoor air into a room using a fan.

Background Art

[0002] Ventilation devices that maintain a clean indoor environment by blowing fresh outdoor air into a room using a fan are known. In such a ventilation device, especially in a situation where the room is being heated in cold weather, cold outdoor air is discharged into the room, causing condensation and cold air to hit the feet of the occupants, giving them an uncomfortable feeling.

[0003] The ventilation devices disclosed in Patent Documents 1 and 2 have an inner air inlet for introducing indoor air in addition to an outer air inlet for introducing outdoor air. Outdoor air and indoor air are sucked into the suction port of the fan and blown out into the room as mixed air from the blowout port. According to such a ventilation device, in cold weather, cold outdoor air is mixed with warm indoor air and supplied into the room, so that the cold air can be alleviated.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Disclosure of the Invention

Problems to be Solved by the Invention

[0005] In the ventilation devices disclosed in Patent Documents 1 and 2, since the discharge port of the fan faces the blowout port of the device main body, the blowout area is narrow, and the occupants feel uncomfortable because they are locally strongly affected by the mixed air from the fan.

Means for Solving the Problems

[0006] The present invention has been made to solve the above problems, and has an outside air inlet for introducing outside air, an inside air inlet for introducing inside air, a device body having an outlet for blowing out mixed air of outside air and inside air, and is housed in the device body, and sucks in outside air from the outside air inlet and inside air from the inside air inlet and discharges the mixed air to the outlet. In a ventilation device including a fan, the outlet is formed wider in a first direction orthogonal to the indoor-outdoor direction than the outlet of the fan, and further includes a blower passage for guiding the mixed air from the outlet of the fan to the outlet, and the blower passage has a direction conversion portion for converting the blowing direction. According to this configuration, the mixed air can be blown out over a wide area from an outlet wider than the outlet of the fan, and the blowing strength can be suppressed through the blower passage that converts the blowing direction, so the comfort can be improved.

[0007] In one embodiment, in the blower passage, the second opening end connected to the outlet is wider in the first direction than the first opening end connected to the outlet of the fan and receiving the mixed air from the outlet of the fan, and the blower passage has a passage expansion portion that expands in the first direction toward the second opening end. According to this configuration, the mixed air can be smoothly circulated in the blower passage.

[0008] In one embodiment, the outlet of the fan faces the outside, the outlet is formed on the front wall on the indoor side of the device body, the blowing direction of the mixed air discharged from the outlet of the fan is converted by the blower passage, and it is blown into the room from the outlet in the direction opposite to the discharge direction from the outlet of the fan. According to this configuration, the length of the blower passage can be made sufficiently long, and the effect of suppressing the blowing strength can be enhanced.

[0009] Preferably, the direction conversion unit includes first and second direction conversion units. The first direction conversion unit converts the blowing direction of the mixed air discharged from the air outlet of the fan toward the outdoor direction into the indoor / outdoor direction and a second direction orthogonal to the first direction. The second direction conversion unit converts the blowing direction of the mixed air from the first direction conversion unit into the indoor / outdoor direction orthogonal to the second direction. According to this configuration, since the blowing direction is converted in two orthogonal directions by the two direction conversion units, the blowing passage can be set while bypassing the fan.

[0010] Preferably, the blowing passage has a passage expansion portion between the first direction conversion unit and the second direction conversion unit that widens the width in the first direction toward the second direction conversion unit. According to this configuration, an increase in the flow resistance at the first direction conversion unit can be avoided.

[0011] Preferably, the passage expansion portion gradually widens the width in the first direction toward the second direction conversion unit. According to this configuration, the flow resistance can be further reduced.

[0012] Preferably, the blowing passage further has another passage expansion portion on the downstream side of the second direction conversion unit that widens the width in the second direction toward the air outlet. According to this configuration, since the dimensions of the blowing passage are expanded in the first and second directions toward the air outlet of the blowing passage, the blowing area of the air from the air outlet can be increased.

[0013] In a more specific form, the first direction is the horizontal direction, the second direction is the vertical direction, the apparatus main body is formed to be elongated in the first direction, and has a partition wall that separates the indoor and outdoor areas, and an indoor side box portion provided on the partition wall and arranged indoors. The indoor side box portion houses the fan and a blower duct that defines the air blowing passage. The fan is a double sirocco fan, and a pair of fan portions of the double sirocco fan are arranged side by side in the first direction. The indoor side box portion has the front wall on which the air outlet is formed. The outside air inlets are formed at both left and right end portions of the partition wall, and the inside air inlets are formed on the left and right side plate portions of the indoor side box portion. According to this configuration, since the introduction direction of the indoor air and the blowing direction of the mixed air are made different, it is possible to avoid the blown mixed air from being re-introduced from the inside air inlet.

Effects of the Invention

[0014] According to the present invention, the mixed air of the outdoor air and the indoor air can be widely blown out while suppressing the blowing strength, so that the comfort of the occupants can be improved.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Best Mode for Carrying Out the Invention

[0016] Hereinafter, a ventilation device according to an embodiment of the present invention will be described with reference to the drawings. This ventilation device is, for example, installed along the upper frame of a sash door that is openably and closably attached to a window frame of a building. The ventilation device mainly includes a horizontally elongated hollow device body 1 shown in FIGS. 1 and 2, and a blower unit 2 shown in FIG. 3 incorporated in the device body 1. In the present embodiment, the horizontal longitudinal direction of the device body 1 is the first direction defined in the claims, and the vertical direction is the second direction.

[0017] <Configuration of the Device Body> The device body 1 is configured by assembling a number of profile materials, and includes a vertically standing partition wall 10 that partitions the inside and outside, an outdoor box portion 20 provided on the outdoor side of the partition wall 10, and an indoor box portion 30 provided on the indoor side.

[0018] As shown in FIG. 6, the outdoor box portion 20 includes a rear cover 21 that covers the partition wall 10 through an outside air introduction space 25, a lower frame portion 22 disposed with a gap 26 below the cover 21, and side plate portions 23 that close both ends of the outside air introduction space 25 and the gap 26. The cover 21 has a lower plate portion 21a that partitions the outside air introduction space 25 and the gap 26, and a number of auxiliary inlets 27 are formed in the central region in the longitudinal direction of the lower plate portion 21a.

[0019] As shown in FIGS. 4, 5, and 7, outside air inlets 11 facing the outside air introduction space 25 are formed at both longitudinal ends of the partition wall 10, and filters 12 are attached to the outside air inlets 11. Outdoor air enters the outside air introduction space 25 from the above-described gap 26 through the central auxiliary inlets 27, is divided into left and right sides from here, passes through the outside air inlets 11 of the partition wall 10, and is introduced into a merging chamber 36 of the indoor box 30 described later.

[0020] On the outdoor side surface of the partition wall 10, a rain shield 13 disposed between the auxiliary air inlet 27 and the left and right outside air inlets 11 is fixed. This rain shield 13 is inclined so as to proceed upward toward the center. The outside air that has passed through the auxiliary air inlet 27 proceeds upward while being gathered toward the center by the pair of rain shields 13, and is divided into left and right while bypassing the pair of rain shields 13 and heads toward the pair of outside air inlets 11. When the outside air contains raindrops, the rain shield 13 can block the raindrops and cause them to fall downward.

[0021] As shown in Fig. 6, the indoor side box portion 30 has three profiles 30a, 30b, 30c that extend horizontally and are connected vertically, and an upper accommodation space 31 and a lower accommodation space 32 are provided between these profiles and the partition wall 10. An air outlet 33 is formed in the front wall at the lower part of the indoor side box portion 30.

[0022] The upper accommodation space 31 has larger dimensions in the indoor-outdoor direction than the lower accommodation space 32 and protrudes toward the indoor side. As shown in Figs. 4 and 5, the left and right ends of these accommodation spaces 31, 32 are blocked by a pair of side plate portions 34. An indoor air inlet 35 is formed in the pair of side plate portions 34. Although not shown, filters are attached to these indoor air inlets 35.

[0023] The left and right ends of the upper accommodation space 31 of the indoor side box portion 30 are provided as a confluence chamber 36. In this confluence chamber 36, the outdoor outside air from the outside air inlet 11 of the partition wall 10 and the indoor air from the indoor air inlet 35 are configured to confluence.

[0024] <Configuration of the built-in unit> As shown in Fig. 3, the built-in unit 2 installed in the apparatus main body 1 includes a double-sirocco fan 40 and a blower duct 50. As shown in Figs. 4 and 5, the double-sirocco fan 40 is disposed in the upper accommodation space 31 of the indoor-side box portion 30 and has a central motor portion 41 and a pair of left and right fan portions 42. Each fan portion 42 has a blade 43 disposed in a cylindrical shape and a cylindrical fan case 44 covering the blade 43. An end portion of the fan portion 42 on the side opposite to the motor portion 41 is provided as a fan suction port 45. The fan suction port 45 faces the confluence chamber 36. Further, the outdoor side of the fan case 44 is open, and this opening is provided as a fan discharge port 46.

[0025] As shown in Fig. 1, the air outlets 33 are formed in two adjacent regions on the left and right, and the width W1 (the width in the longitudinal direction of the apparatus main body 1) of each air outlet 33 is wider than the width W2 (Fig. 4) of each fan discharge port 46 of the double-sirocco fan 40.

[0026] As shown in Figs. 3 and 6, the blower duct 50 includes a first duct portion 51 disposed on the outdoor side of the double-sirocco fan 40, a second duct portion 52 connected to the lower end of the first duct portion 51, and a third duct portion 53 connected to the indoor side of the second duct portion 52 and extending horizontally toward the air outlet 33, and forms a substantially L shape when viewed from the longitudinal direction of the apparatus main body 1.

[0027] The first duct portion 51 is accommodated in the upper accommodation space 31 of the indoor-side box portion 30 together with the double-sirocco fan 40, and the second duct portion 52 and the third duct portion 53 are accommodated in the lower accommodation space 32. The first duct portion 51 has a width substantially corresponding to that of the double-sirocco fan 40 (the width in the longitudinal direction of the apparatus main body 1), and the total width of the bifurcated third duct portions 53 is wider than the width of the first duct portion 51.

[0028] An internal space defined by the air supply duct 50 is provided as the air supply passage 50x. The air supply passage 50x has a first opening end 50a (upstream end) facing the fan discharge ports 46 of the pair of fan units 42 of the double sirocco fan 40, and a second opening end 50b (downstream end) connected to the air outlet 33. The first opening end 50a has an opening area including the pair of fan discharge ports 46. In the present embodiment, two second opening ends 50b are formed corresponding to the pair of air outlets 33, each having the same shape and opening area as the air outlet 33. The total width of the pair of second opening ends 50b (the total width in the longitudinal direction of the apparatus main body 1) is wider than the first opening end 50a.

[0029] In the present embodiment, the third duct portion 53 branches left and right, and two second opening ends 50b of the air supply passage 50x are formed corresponding to the formation regions of the two air outlets 33. However, the third duct portion 53 may not branch and may have a single second opening end 50b. In this case, the formation region of the air outlet 33 may be a continuous single region. Also, two air supply ducts may be provided corresponding to the pair of fan units 42.

[0030] The blowing direction of the mixed air from the fan discharge port 46 toward the outside is converted downward in the first duct portion 51. That is, the air supply passage 50x has a first direction conversion portion 55 in the first duct portion 51.

[0031] In the second duct portion 52, the air supply passage 50x is gradually widened in the longitudinal direction of the apparatus main body 1 toward the downstream. That is, the air supply passage 50x has a passage expansion portion 56 in the second duct portion 52.

[0032] Furthermore, in the second duct portion 52, on the downstream side of the passage expansion portion 56, the blowing direction of the mixed air is converted from downward to horizontally inward. That is, the air supply passage 50x has a second direction conversion portion 57 in the second duct portion 52.

[0033] In the upstream portion of the third duct portion 53, the air supply passage 50x expands in the vertical direction downstream. That is, the air supply passage 50x has a second passage expansion portion 58. A filter 59 is attached to the second opening end 50b.

[0034] <Operation of the ventilation device> The operation of the ventilation device having the above configuration will be described. The outside air from the outside air inlets 11 formed at both left and right ends of the ventilation device and the inside air from the inside air inlet 35 also merge in the merging chamber 36, and are sucked in from a pair of fan suction ports 45 located at both ends of the double-sirocco fan 40, become mixed air, are discharged from the pair of fan discharge ports 46, and are blown out from the air outlet 33 through the air supply passage 50x.

[0035] Since the mixed air contains not only outside air but also inside air, in a situation where the indoor area is being heated in cold weather, the cold outside air can be moderated by the indoor warm air. As a result, condensation inside the room can be prevented, and cold air can be prevented from being applied to the feet of the occupants.

[0036] The inside air inlet 35 is formed in the left and right side plate portions 34 of the device main body 1, and the air outlet 33 is formed in the front wall of the device main body 1. Therefore, the suction direction and the blowing direction of the indoor air can be made different, and thereby the mixed air blown out can be prevented from being immediately reintroduced into the inside air inlet 35.

[0037] The mixed air discharged outdoors from the fan discharge ports 46 of the pair of fan units 42 of the double sirocco fan 40 is converted downward in the first direction conversion section 55 of the air duct 50x, and then converted horizontally indoors in the second direction conversion section 57. By this conversion of the air blowing direction, the strength of the air blowing from the double sirocco fan 40 can be suppressed, so that the comfort can be improved as compared with the case of directly receiving the strong air blowing from the double sirocco fan 40. Moreover, since the mixed air from the fan discharge ports 46 is expanded in the longitudinal direction of the apparatus main body 1 in the first duct expansion section 56 and expanded in the vertical direction in the second duct expansion section 58, the mixed air can be blown out from a wide area, and the comfort can be improved as compared with the case where the mixed air is blown out locally.

[0038] Since the first duct expansion section 56 is arranged upstream of the second direction conversion section 57 and the second duct expansion section 57 is arranged downstream thereof, an increase in flow resistance associated with the conversion of the air blowing direction in the second direction conversion section 57 can be avoided.

[0039] In the present embodiment, since the air blowing direction is converted in directions orthogonal to each other by the two direction conversion sections, the air duct can be set while bypassing the fan, and the air duct can be lengthened.

[0040] The present invention is not limited to the above embodiment, and various aspects are possible. For example, in the present embodiment, a double sirocco fan is used, but various fans can be adopted. Also, various forms of the air duct can be adopted, and the number of direction conversion sections and the conversion angle of the air blowing direction in the direction conversion section can be appropriately selected. For example, the air blowing direction may be converted obliquely downward in the second direction conversion section, and the mixed air may be blown out indoors obliquely downward (in the direction opposite to the fan discharge direction) from the air outlet of the apparatus main body.

Industrial Applicability

[0041] The present invention can be applied to a ventilation device configured to blow outdoor air indoors using a fan.

Explanation of Reference Numerals

[0042] 1 Device body 10 Partition wall 11 Outside air inlet 30 Outdoor box part 33 Air outlet 34 Side plate part 35 Inside air inlet 40 Double sirocco fan (fan) 42 Fan part 45 Fan suction port 46 Fan discharge port 50 Air duct 50x Air passage 50a First opening end 50b Second opening end 55 First direction conversion part 56 First passage expansion part 57 Second direction conversion part 58 Second passage expansion part

Claims

1. An apparatus main body having an outside air inlet for introducing outside air, an inside air inlet for introducing inside air, and an air outlet for blowing out mixed air of outside air and inside air, a fan housed in the apparatus main body, sucking in outside air from the outside air inlet and inside air from the inside air inlet, and discharging the mixed air to the air outlet, In a ventilation device provided with the air outlet is formed wider in a first direction orthogonal to the indoor-outdoor direction than the discharge port of the fan, further comprising a blower passage for guiding the mixed air from the discharge port of the fan to the air outlet, the blower passage having a direction conversion part for converting the blowing direction, characterized in that it is a ventilation device.

2. In the blower passage, compared to the first opening end that is connected to the discharge port of the fan and receives the mixed air from the discharge port of the fan, the width in the first direction of the second opening end connected to the air outlet is wider, and the blower passage has a passage expansion part that expands in the first direction toward the second opening end, characterized in that it is the ventilation device according to Claim 1.

3. The discharge port of the fan faces the outside, the air outlet is formed on the front wall on the indoor side of the apparatus main body, the blowing direction of the mixed air discharged from the discharge port of the fan is converted by the blower passage, and it is blown into the room from the air outlet in the direction opposite to the discharge direction from the discharge port of the fan, characterized in that it is the ventilation device according to Claim 1.

4. The direction conversion part includes a first and a second direction conversion part, the first direction conversion part converts the blowing direction of the mixed air discharged from the discharge port of the fan in the outdoor direction to the indoor-outdoor direction and a second direction orthogonal to the first direction, the second direction conversion part converts the blowing direction of the mixed air from the first direction conversion part to the indoor-outdoor direction orthogonal to the second direction, characterized in that it is the ventilation device according to Claim 3.

5. The blower passage has a passage expansion part that widens the width in the first direction toward the second direction conversion part between the first direction conversion part and the second direction conversion part, characterized in that it is the ventilation device according to Claim 4.

6. The passage expansion part gradually widens the width in the first direction toward the second direction conversion part, characterized in that it is the ventilation device according to Claim 5.

7. The blower passage further has another passage expansion part that widens the width in the second direction toward the air outlet on the downstream side of the second direction conversion part, characterized in that it is the ventilation device according to Claim 5.

8. wherein the first direction is horizontal and the second direction is vertical, the apparatus main body is formed to be elongated in the first direction and has a partition wall that separates indoors and outdoors, and an indoor box portion provided on the partition wall and arranged indoors, and the indoor box portion houses the fan and a blower duct that defines the air passage, the fan is a double-sirocco fan, and a pair of fan portions of the double-sirocco fan are arranged side by side in the first direction, the indoor box portion has the front wall in which the air outlet is formed, the ventilation device according to any one of claims 3 to 6, wherein the outside air inlets are formed at both left and right ends of the partition wall, and the inside air inlets are formed at left and right side plate portions of the indoor box portion.

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