WO2020021623A1

WO2020021623A1 - Blower device

Info

Publication number: WO2020021623A1
Application number: PCT/JP2018/027657
Authority: WO
Inventors: 慶二郎山口; 良浩藤岡; 逸平百瀬
Original assignee: 三菱電機株式会社
Priority date: 2018-07-24
Filing date: 2018-07-24
Publication date: 2020-01-30

Abstract

This blower device comprises: a casing that includes a first side part to which a first discharge port is provided and which extends on a first plane, and a second side part to which a second discharge port is provided and which extends on a second plane intersecting the first plane; a blower that is positioned in the casing; and a blowout flow path cover that places a blowout port of the blower, the first discharge port and the second discharge port in communication with one another. In a plan view from the direction extending in the intersection line of the first plane and the second plane: an acute angle is formed by a blowout-face normal, oriented in the blowout direction, of the opening face of the blowout port, and a first discharge-face normal, oriented towards a first outer surface, of the opening face of the first discharge port; and an acute angle is formed by the blowout-port-face normal and by a second discharge-face normal, oriented towards a second outer surface, of the opening face of the second discharge port.

Description

Blower

The present invention relates to a blower.

Conventionally, there is known a blower that is installed in a space such as above a ceiling of a building, supplies air to a room through a duct, and exhausts air from the room to ventilate the room. As such a blower, for example, there is a heat exchange ventilator described in Patent Document 1.

熱 In this heat exchange ventilator, a heat exchanger and two blowers for air supply and exhaust are incorporated in a main casing of a rectangular parallelepiped box structure. The heat exchanger is arranged in the center of the main casing, and two blowers are arranged respectively on both sides of the heat exchanger. In the main body casing, a primary flow path that is continuous through one heat exchange passage of the heat exchanger and a secondary flow path that is continuous through the other heat exchange passage of the heat exchanger are independent of each other. It is configured. An exhaust blower is disposed in the primary flow path, and an air supply blower is disposed in the secondary flow path. The blower casing of each blower is incorporated in the main body casing such that the blowing side extends toward a pair of diagonal corners of the main body casing. These corners are formed by two sides intersecting at right angles to the main casing, and one corner has one outlet on each of the two sides, which serves as an outlet end of the primary flow path or the secondary flow path. Are provided.

Thus, in the heat exchange ventilator described in Patent Literature 1, an air outlet having a pair of two outlets having directions different by 90 degrees is provided. Thereby, when connecting the duct to the air outlet for air supply and exhaust and connecting the indoor or outdoor with the heat exchange ventilator, the air outlet which is convenient for laying the duct among the two air outlets is used. This makes it possible to prevent structures such as beams behind the ceiling from hindering the installation.

Japanese Patent No. 3543485 (paragraph 0016-0022, FIG. 1)

In the heat exchange ventilator (blower) described in Patent Literature 1, one of two blowout outlets (exhaust outlets) provided at corners of the main body casing so as to have directions differing by 90 degrees, one of which is a discharge outlet of the blower. , And the other is parallel to the discharge port of the blower. For this reason, when one of the outlets is used, the flow path is largely bent, whereas when the other outlet is used, the flow path becomes substantially straight. Therefore, the pressure loss of the flow path from the outlet of the blower to the outlet changes between the case where one outlet is used and the case where the other outlet is used, and the blowing performance may be greatly changed. There was sex.

The present invention has been made in view of the above circumstances, and in a blowing device having a plurality of exhaust ports, the blowing performance when using one exhaust port and the blowing performance when using another exhaust port. It is an object of the present invention to provide a blower that can reduce the difference between the blowers and can suppress a change in blower performance.

According to one aspect of the present invention, the blower is provided with a first exhaust port, a first side portion extending on the first plane, and a second exhaust port, and intersects the first plane. A second side portion extending on the second plane, and a casing provided with a first intake port communicating with the outside, and an intake port arranged in the casing and communicated with the first intake port. And a discharge port, and a first blower configured to be able to blow out air sucked in from the suction port from the discharge port, and a space surrounded by the discharge port, the first exhaust port, and the second exhaust port. An outlet channel cover for communicating the outlet, the first exhaust port, and the second exhaust port with each other. The first plane has a first inner surface facing the inside of the casing and a first outer surface facing the opposite side to the first inner surface, and the second plane has a second inner surface facing the inside of the casing and a second inner surface. A second outer surface facing the opposite side. The discharge port is arranged on the first inner surface side with respect to the first plane, and is arranged on the second inner surface side with respect to the second plane. In a plan view from the direction along the intersection line of the first plane and the second plane, the discharge surface normal facing the discharge direction of the opening surface of the discharge port and the first outer surface side of the opening surface of the first exhaust port. The angle between the first exhaust surface normal and the discharge surface is an acute angle, and the angle between the discharge surface normal and the second exhaust surface normal facing the second outer surface side of the opening surface of the second exhaust port is an acute angle. The surface normal and the first exhaust surface normal are parallel to each other in the same direction, and the angle between the discharge surface normal and the second exhaust surface normal is an acute angle, or the discharge surface normal and the first exhaust The angle formed by the surface normal is acute, and the discharge surface normal and the second exhaust surface normal are parallel to each other in the same direction.

According to the above-described blower, the angle between the discharge surface normal and the first exhaust surface normal is an acute angle and the discharge is performed in a plan view from the direction along the intersection line of the first plane and the second plane. The angle between the surface normal and the second exhaust surface normal is acute, the discharge surface normal and the first exhaust surface normal are parallel to each other in the same direction, and the discharge surface normal and the second exhaust surface method The angle between the line and the line is an acute angle, or the angle between the discharge surface normal and the first exhaust surface normal is an acute angle, and the discharge surface normal and the second exhaust surface normal are parallel to each other in the same direction. It is. For this reason, as compared with the case where the angle between the discharge surface normal and the first exhaust surface normal is a right angle or an obtuse angle or the case where the angle between the discharge surface normal and the second exhaust surface normal is a right angle or an obtuse angle Thus, the difference between the pressure loss of the flow path from the discharge port to the first exhaust port and the pressure loss of the flow path from the discharge port to the second exhaust port can be reduced. Therefore, the difference between the air blowing performance when the first exhaust port is used and the air blowing performance when the second exhaust port is used can be reduced, and a change in the air blowing performance can be suppressed.

It is a perspective view showing the appearance of a ventilation device which is a blower concerning Embodiment 1 of the present invention. It is a top view which shows the said ventilation apparatus by seeing through the upper surface. It is a typical side sectional view of the ventilation device. It is a top view which shows typically the part containing the exhaust blower in the said ventilation apparatus. It is the perspective view seen from the slanting lower part which penetrated some surfaces of the ventilation device. It is a perspective view of the fan casing of the exhaust fan of the said ventilation apparatus. It is a graph which shows the ventilation performance in the said ventilation apparatus. It is a graph which shows the ventilation performance in the conventional ventilation device. It is a top view which shows typically the part containing the exhaust blower in the ventilation apparatus which is the air blower which concerns on Embodiment 2 of this invention. It is the perspective view seen from the slanting lower part which penetrated some surfaces of the ventilation device. It is a top view which shows typically the part containing the exhaust blower in the ventilation apparatus which is the air blower which concerns on Embodiment 3 of this invention. It is a top view which shows the structure of the conventional ventilation apparatus typically.

(Embodiment 1)
Hereinafter, a ventilation device 1 which is a blower according to Embodiment 1 of the present invention will be described with reference to the drawings. The ventilator 1 is used, for example, when ventilating an air-conditioned target space (for example, a room in a house or a building, or in a warehouse). In this case, the ventilator 1 takes in the air in the target space and discharges it to the outside of the target space, that is, exhausts the air, and also takes in the air outside the target space and supplies it to the target space, that is, supplies air.

FIG. 1 is a perspective view showing the external appearance of the ventilation device 1. The arrows in FIG. 1 indicate the flow of air. FIG. 2 is a plan view showing the ventilation device 1 through the upper surface of the ventilation device 1 in FIG.

As shown in FIGS. 1 and 2, the ventilation device 1 includes a casing 10, an exhaust blower (first blower) 30, and a blow-out channel cover 40.

The casing 10 has a first side 11 extending on the first plane P1 and a second side 12 extending on a second plane P2 intersecting the first plane P1. The first side portion 11 is provided with a first exhaust port 17A. The second side portion 12 is provided with a second exhaust port 17B. Further, the casing 10 is provided with a first intake port 18A communicating with the outside of the casing 10.

では In the present embodiment, casing 10 is a rectangular parallelepiped box. Therefore, the casing 10 includes a first side portion 11, a second side portion 12, a third side portion 13 facing the first side portion 11, a fourth side portion 14 facing the

second side portion

12, 1 has a fifth side portion 15 corresponding to the top surface of the casing 10 and a sixth side portion 16 corresponding to the bottom surface of the casing 10 in FIG. That is, the first side portion 11 and the second side portion 12 each constitute one surface of a rectangular parallelepiped shape of the casing 10, and the first plane P1 and the second plane P2 are orthogonal to each other. Further, the first plane P1 has a first inner surface Pi1 facing the inside of the casing 10 and a first outer surface Po1 facing the opposite side to the first inner surface Pi1. The second plane P2 has a second inner surface Pi2 facing the inside of the casing 10 and a second outer surface Po2 facing the opposite side to the second inner surface Pi2. The casing 10 is formed of, for example, a metal plate such as a steel plate.

The first exhaust port 17 A provided in the first side portion 11 is, for example, a circular opening penetrating the first side portion 11. It is located on the side closer to. The second exhaust port 17B provided in the second side portion 12 is, for example, a circular opening penetrating the second side portion 12, and has the same opening diameter as the first exhaust port 17A. Further, the second exhaust port 17 B is arranged on the second side portion 12 on a side closer to the first side portion 11 than the third side portion 13. In the present embodiment, the first exhaust port 17 A and the second exhaust port 17 B are arranged near the ridge 19, which is a connection portion between the first side 11 and the second side 12. The direction in which the first exhaust port 17A opens and the direction in which the second exhaust port 17B opens differ by 90 degrees.

Normally, the first exhaust port 17A and the second exhaust port 17B are not used simultaneously. That is, when one of the first exhaust port 17A and the second exhaust port 17B is used, the other is closed. For example, as shown in FIGS. 1 and 2, when the first exhaust port 17A is used, a duct connecting flange 20 is attached to the first side portion 11 around the first exhaust port 17A by a screw or the like. Have been. The flange 20 is formed in a cylindrical shape, and the inside of the cylinder and the first exhaust port 17A communicate with each other. A closing plate (blocking member) 21 for closing the second exhaust port 17B is attached to the second side portion 12 around the second exhaust port 17B by a screw or the like. The closing plate 21 is formed in a plate shape that covers the entire second exhaust port 17B.

The first intake port 18 A provided in the casing 10 is disposed on the third side portion 13, and is disposed on the third side portion 13 on a side closer to the second side portion 12 than the fourth side portion 14. . The first air inlet 18A is, for example, a circular opening that penetrates the third side portion 13. A flange 20 for duct connection is attached to the third side portion 13 around the first air inlet 18A. Further, the casing 10 is further provided with a second intake port 18B and a third exhaust port 17C communicating with the outside. The second intake port 18 B is disposed on the first side portion 11, and is disposed on the first side portion 11 on a side closer to the fourth side portion 14 than the second side portion 12. The second intake port 18B is, for example, a circular opening penetrating the first side portion 11. The third exhaust port 17 C is arranged on the third side portion 13, and is arranged on the third side portion 13 on a side closer to the fourth side portion 14 than the second side portion 12. A flange 20 for duct connection is attached to the first side portion 11 around the second intake port 18B and the third side portion 13 around the third exhaust port 17C.

排気 As shown in FIG. 2, the exhaust blower 30 is arranged in the casing 10. The exhaust blower 30 is provided with a suction port 31 communicating with the first intake port 18A and a discharge port 32. The exhaust blower 30 is configured to be able to blow air sucked from the suction port 31 through the discharge port 32. In the present embodiment, the exhaust blower 30 is a centrifugal blower. The exhaust blower 30 includes a motor 33, a fan 34 rotated by driving the motor 33, and a fan casing 35 surrounding the fan 34. A suction port 31 and a discharge port 32 are formed in the fan casing 35. The suction port 31 is a circular opening, and the discharge port 32 is a rectangular opening.

The blow-out channel cover 40 is provided so as to cover a space surrounded by the discharge port 32, the first exhaust port 17A, and the second exhaust port 17B. The outlet channel cover 40 connects the discharge port 32, the first exhaust port 17A, and the second exhaust port 17B to each other. When the flange 20 is attached around the first exhaust port 17A by the outlet channel cover 40, a channel that flows from the discharge port 32 to the first exhaust port 17A is formed, and the second exhaust port 17B is closed. When the flange 20 is attached to the periphery, a flow path that flows from the discharge port 32 to the second exhaust port 17B is formed.

The ventilation device 1 further includes an air supply blower (second blower) 50 provided in the casing 10. The air supply blower 50 is arranged to blow out the air sucked in through the second intake port 18B to the third exhaust port 17C. In the present embodiment, the air supply blower 50 is a centrifugal blower, like the exhaust blower 30. The air supply blower 50 includes a motor 53, a fan 54 rotated by driving the motor 53, and a fan casing 55 surrounding the fan 54.

The ventilator 1 further includes a heat exchanger 60 for exchanging heat between the supply air flow and the exhaust air flow. Here, the supply air flow refers to a flow that flows in from the second intake port 18B and flows out of the third exhaust port 17C through the air supply blower 50 for convenience, and the exhaust flow refers to the first intake port 18A. From the first exhaust port 17A or the second exhaust port 17B via the exhaust blower 30 for convenience. In the present embodiment, the heat exchanger 60 has a flat primary passage formed by bonding corrugated paperboard (corrugated sheet) on flat paper, and a corrugated paperboard (corrugated sheet) similarly bonded on flat paper. A large number of the formed flat secondary passages are stacked so as to be orthogonal to each other. This allows heat exchange between the exhaust flow passing through the primary passage and the supply air flow passing through the secondary passage. The heat exchanger 60 has a rectangular parallelepiped shape as a whole, and is arranged at the center in the casing 10. In the casing 10, the exhaust blower 30 is disposed between the heat exchanger 60 and the first side portion 11, and the air supply blower 50 is disposed between the heat exchanger 60 and the third side portion 13. I have.

Here, the flow of air supply and exhaust in the ventilation device 1 will be described. FIG. 3 is a schematic side sectional view of the ventilation device 1. As shown in FIG. 3, a partition wall 22 that divides an internal space into two is provided in the casing 10, and the supply air flow and the exhaust air flow are configured to flow independently of each other. In the exhaust flow, by operating the exhaust blower 30, air is sucked from the first intake port 18A as indicated by an arrow A1, passes through the primary passage of the heat exchanger 60 as indicated by an arrow A2, and passes through an arrow A3. As shown in the arrow A4, the air enters the fan casing 35 of the exhaust blower 30 and is blown out from the first exhaust port 17A or the second exhaust port 17B. In the air supply flow, by operating the air supply blower 50, air is sucked in from the second intake port 18B as shown by the arrow B1, passes through the secondary passage of the heat exchanger 60 as shown by the arrow B2, The air enters the fan casing 55 of the air supply blower 50 as indicated by an arrow B3, and is blown out from the third exhaust port 17C as indicated by an arrow B4. In this way, in the ventilator 1, the heat exchange ventilation operation by simultaneous supply and exhaust can be performed while performing heat exchange between the supply air flow and the exhaust air flow. The control of the rotation speed of the exhaust blower 30 and the air supply blower 50 is performed by a control device (not shown) provided in the ventilator 1.

Next, the configuration around the exhaust blower 30, the first exhaust port 17A, and the second exhaust port 17B of the ventilation device 1 will be described in more detail with reference to FIGS. FIG. 4 is a plan view schematically showing a portion including the exhaust blower 30 in the ventilation device 1. FIG. 5 is a perspective view of the ventilation device 1 as seen from obliquely below through the first side portion 11 and the sixth side portion 16 of the ventilation device 1. FIG. 6 is a perspective view of the fan casing 35 of the exhaust blower 30. In FIGS. 4 and 5, in order to easily explain both the case where the first exhaust port 17A is used and the case where the second exhaust port 17B is used, the vicinity of the first exhaust port 17A and the second exhaust port 17A will be described. This shows a state in which the flanges 20 are provided both around the opening 17B.

As shown in FIG. 4, the discharge port 32 of the exhaust blower 30 is arranged on the first inner surface Pi1 side with respect to the first plane P1, and is arranged on the second inner surface Pi2 side with respect to the second plane P2. . Further, a normal line facing the discharge direction of the opening surface S1 of the discharge port 32 is defined as a discharge surface normal line N1, and a normal line facing the first outer surface Po1 side of the opening surface S2 of the first exhaust port 17A is defined as a first exhaust surface normal line. N2, and a normal line facing the second outer surface Po2 side of the opening surface S3 of the second exhaust port 17B is set as a second exhaust surface normal line N3. Here, the discharge direction of the exhaust blower 30 is a direction in which air is blown out from the discharge port 32 when the exhaust blower 30 is operating. In this case, in a plan view from the direction along the intersection line L between the first plane P1 and the second plane P2 (in the present embodiment, the plane view shown in FIG. 4), the discharge surface normal N1 and the first exhaust gas The angle T1 formed by the surface normal N2 is an acute angle, and the angle T2 formed by the discharge surface normal N1 and the second exhaust surface normal N3 is also an acute angle. Preferably, the angle T1 between the discharge surface normal N1 and the first exhaust surface normal N2 and the angle T2 between the discharge surface normal N1 and the second exhaust surface normal N3 are both 30 degrees or more and 60 degrees. It is as follows. In other words, the absolute value of the difference between the angle T1 and the angle T2 is not less than 0 degrees and not more than 30 degrees. More preferably, the angle T1 between the discharge surface normal N1 and the first exhaust surface normal N2 and the angle T2 between the discharge surface normal N1 and the second exhaust surface normal N3 are both 45 degrees. In other words, the absolute value of the difference between the angle T1 and the angle T2 is 0 degree.

With such a configuration, the angle T1 formed between the discharge surface normal N1 and the first exhaust surface normal N2 is a right angle or an obtuse angle, or the angle formed between the discharge surface normal N1 and the second exhaust surface normal N3. The difference between the pressure loss of the flow path from the discharge port 32 to the first exhaust port 17A and the pressure loss of the flow path from the discharge port 32 to the second exhaust port 17B is smaller than when T2 is a right angle or an obtuse angle. can do. As shown in FIG. 12 as an example, in the configuration of the conventional ventilation device 101, the angle T11 between the discharge surface normal N11 and the first exhaust surface normal N12 is a right angle, and the discharge surface normal N11 and the second exhaust The angle formed by the surface normal N13 is 0 degrees, that is, the discharge surface normal N11 and the second exhaust surface normal N13 are parallel to each other. In this case, since the flow path from the discharge port 132 of the exhaust blower 130 to the first exhaust port 117A bends at a right angle, the pressure loss in this flow path is large. On the other hand, since the flow path from the discharge port 132 to the second exhaust port 117B is substantially straight, the pressure loss in this flow path is small. Therefore, in the conventional configuration, the difference between the air blowing performance when using the first exhaust port 117A and the air blowing performance when using the second exhaust port 117B is large. On the other hand, in the ventilator 1 according to the present embodiment, as shown in FIG. 4, the angle T1 formed between the discharge surface normal N1 and the first exhaust surface normal N2 and the discharge surface normal N1 and the second Since both angles T2 formed by the exhaust surface normal line N3 are acute angles, the curvature of the flow path from the discharge port 32 to the first exhaust port 17A and the curvature of the flow path from the discharge port 32 to the second exhaust port 17B are different. The difference becomes smaller. Therefore, the difference between the pressure loss of the flow path from the discharge port 32 to the first exhaust port 17A and the pressure loss of the flow path from the discharge port 32 to the second exhaust port 17B becomes small, so that the first exhaust port 17A is used. In this case, the difference between the air blowing performance in the case where the air is discharged and the air blowing performance in the case where the second exhaust port 17B is used can be reduced. As a result, it is possible to suppress a change in the air blowing performance due to a difference in the exhaust port used.

The difference between the distance between the discharge port 32 of the exhaust blower 30 and the first exhaust port 17A and the distance between the discharge port 32 and the second exhaust port 17B is within a predetermined range. This prevents one of the flow path from the discharge port 32 to the first exhaust port 17A and the flow path from the discharge port 32 to the second exhaust port 17B from being lengthened, so that the pressure loss of one of them becomes large. Thus, the difference between one pressure loss and the other pressure loss can be suppressed. More specifically, the distance D1 between the center C1 of the opening surface S1 of the discharge port 32 and the center C2 of the opening surface S2 of the first exhaust port 17A, the center C1 of the opening surface S1 of the discharge port 32 and the second The difference from the distance D2 between the exhaust port 17B and the center C3 of the opening surface S3 is within a predetermined range. Here, the center of the opening surface is the centroid of the opening surface. In the conventional ventilation device 101 shown in FIG. 12, in a plan view (a plan view shown in FIG. 12) from the direction along the intersection line L of the first plane P1 and the second plane P2, The covered space has a substantially square shape. At this time, a right-angled isosceles triangle is formed by three points of the center C11 of the opening surface S11 of the discharge port 132, the center C12 of the opening surface S12 of the first exhaust port 117A, and the center C13 of the opening surface S13 of the second exhaust port 117B. Therefore, assuming that the distance D11 between the center C11 and the center C12 is 1, the distance D12 between the center C11 and the center C13 is 1.414. As shown in FIG. 4, in the ventilation device 1 according to the present embodiment, the opening surface S1 of the discharge port 32 is set so that the angle T1 between the discharge surface normal N1 and the first exhaust surface normal N2 is an acute angle. It is inclined with respect to the opening surface S2 of the first exhaust port 17A. Therefore, the distance D2 between the center C1 of the opening surface S1 of the discharge port 32 and the center C3 of the opening surface S3 of the second exhaust port 17B is equal to the center C1 of the opening surface S1 of the discharge port 32 and the first exhaust port 17A. Is smaller than 1.414 times the distance D1 between the opening surface S2 and the center C2. Therefore, the distance D2 between the center C1 of the opening surface S1 of the discharge port 32 and the center C3 of the opening surface S3 of the second exhaust port 17B is equal to the distance between the center C1 of the opening surface S1 of the discharge port 32 and the first exhaust port 17A. It is preferable that the distance be less than 1.414 times the distance D1 between the opening surface S2 and the center C2. Further, the distance D2 between the center C1 of the opening surface S1 of the discharge port 32 and the center C3 of the opening surface S3 of the second exhaust port 17B is determined by the distance between the center C1 of the opening surface S1 of the discharge port 32 and the first exhaust port 17A. More preferably, it is equal to the distance D1 between the opening surface S2 and the center C2.

As shown in FIGS. 4 and 5, the exhaust blower 30 is disposed such that the opening surface S4 of the suction port 31 is perpendicular to a plane orthogonal to both the first plane P1 and the second plane P2. I have. That is, in the present embodiment, the exhaust blower 30 is arranged such that the opening surface S4 of the suction port 31 is perpendicular to the sixth side portion 16 corresponding to the bottom surface of the casing 10. Thereby, the size range required for the exhaust blower 30 on the sixth side portion 16 can be reduced as compared with the case where the opening surface S4 of the suction port 31 is disposed horizontally with respect to the sixth side portion 16. .

As shown in FIG. 4 to FIG. 6, in the present embodiment, the outlet flow passage cover portion 40 includes a cover portion main body 41, a portion around the first exhaust port 17 A of the first side portion 11, And a part around the second exhaust port 17 B of the side part 12. The cover body 41 is made of, for example, resin and is formed integrally with the fan casing 35 of the exhaust blower 30. However, the present invention is not limited to this, and the cover body 41 may be formed separately from the fan casing 35. Further, a part of the fifth side portion 15 and the sixth side portion 16 of the casing 10 may be used as the blowout channel cover portion 40.

Next, an example of the ventilation device 1 according to the present embodiment will be described in comparison with a conventional configuration. Table 1 shows that the angle T1 between the discharge surface normal N1 and the first exhaust surface normal N2 and the angle T2 between the discharge surface normal N1 and the second exhaust surface normal N3 are changed. The calculation result of the pressure loss PL1 of the flow path from the discharge port 32 to the first exhaust port 17A and the pressure loss PL2 of the flow path from the discharge port 32 to the second exhaust port 17B are shown. Table 1 shows that the angle T1 is 0 degree, the angle T2 is 90 degrees, the case 1 is 30 degrees, the angle T1 is 30 degrees, the angle T2 is 60 degrees, the angle T1 and the angle T2 are both 45 degrees. Five cases are shown: Case 3, case 4 in which the angle T1 is 60 degrees and angle T2 is 30 degrees, and case 5 in which the angle T1 is 90 degrees and the angle T2 is 0 degrees. Among them, case 1 and case 5 have a conventional configuration, and cases 2 to 4 have a configuration according to the present embodiment. As a calculation condition, the first plane P1 and the second plane P2 are assumed to be orthogonal to each other. The pressure loss PL1 in the flow path from the discharge port 32 to the first exhaust port 17A and the pressure loss PL2 in the flow path from the discharge port 32 to the second exhaust port 17B are such that the pipe diameter is 150 mm and the bending radius is 80 mm. The calculation was made assuming the pressure loss of a certain bent pipe. The flow rate was 250 m ³ / h.

As can be seen from Table 1, in cases 1 and 5 which are conventional configurations, the absolute value of the difference between pressure loss PL1 and pressure loss PL2 is 15 Pa, whereas the configuration according to the present embodiment is provided. In Case 2 and Case 4, the absolute value of the difference between the pressure loss PL1 and the pressure loss PL2 is reduced to 4.9 Pa. Further, in Case 3, the difference between the pressure loss PL1 and the pressure loss PL2 is 0 Pa. Thus, it can be seen that in the present embodiment, the difference between the pressure loss PL1 and the pressure loss PL2 can be significantly reduced as compared with the conventional configuration.

Referring to FIGS. 7 and 8, the ventilation performance of ventilation device 1 according to the present embodiment and the ventilation performance of conventional ventilation device 101 are compared based on the actually measured results. FIG. 7 is a graph showing the ventilation performance of the ventilator 1. FIG. 8 is a graph showing the ventilation performance of the ventilation device 101. The air blowing performance shown in the graph of FIG. 7 is the air blowing performance when the air is blown from the exhaust air blower 30 in a state where the exhaust air blower 30 of the ventilator 1 is arranged so that both the angle T1 and the angle T2 are 45 degrees. It is. The air blowing performance shown by the graph in FIG. 6 is the air blowing performance when air is blown from the exhaust blower 130 of the ventilator 101. Except for the angle T1 and the angle T2 being 45 degrees in the ventilator 1 and the angle T11 being 90 degrees in the ventilator 101, the conditions are set to be equal between the ventilator 1 and the ventilator 101. I have. 7 and 8, the vertical axis represents static pressure and the horizontal axis represents airflow. The solid line in the graph of FIG. 7 is a static pressure-air volume characteristic curve when the first exhaust port 17A is used, and the dotted line is a static pressure-air volume characteristic curve when the second exhaust port 17B is used. The solid line in the graph of FIG. 8 is a static pressure-air volume characteristic curve when the first exhaust port 117A is used, and the dotted line is a static pressure-air volume characteristic curve when the second exhaust port 117B is used. The curves shown by long dashed lines in the graphs of FIGS. 7 and 8 are examples of the curve showing the assumed pressure loss during use, and are common to both graphs.

In the conventional ventilation device 101, as shown in the graph of FIG. 8, the characteristic curve when the first exhaust port 117A is used is larger than the characteristic curve when the second exhaust port 117B is used, and Both the static pressure is small. At the time of the assumed use, the air volume at the intersection of the characteristic curve and the pressure loss curve when the first exhaust port 117A is used is the difference between the characteristic curve and the pressure loss curve when the second exhaust port 117B is used. It is about 3% smaller than the air volume at the intersection. As described above, in the conventional ventilation device 101, it can be seen that there is a slight difference between the air blowing performance when the first exhaust port 117A is used and the air blowing performance when the second exhaust port 117B is used. On the other hand, in the ventilation device 1 according to the present embodiment, as shown in the graph of FIG. 7, the characteristic curve when the first exhaust port 17A is used and the characteristic when the second exhaust port 17B is used. The curve is almost overlapped. In addition, in an assumed use, the airflow at the intersection of the characteristic curve and the pressure loss curve when the first exhaust port 17A is used and the intersection between the characteristic curve and the pressure loss curve when the second exhaust port 17B is used. Is almost the same as the air volume at As described above, in the ventilation device 1 according to the present embodiment, it can be seen that there is almost no difference between the ventilation performance when the first exhaust port 17A is used and the ventilation performance when the second exhaust port 17B is used. .

The ventilation device 1 which is the blower according to the present embodiment is provided with the first exhaust port 17A, the first side portion 11 extending on the first plane P1, and the second exhaust port 17B, A casing 10 having a second side portion 12 extending on a second plane P2 orthogonal to the first plane P1 and having a first intake port 18A communicating with the outside, and disposed in the casing 10 An exhaust blower 30 that is provided with a suction port 31 and a discharge port 32 that are communicated with the first suction port 18A, and that is configured to be able to blow out air sucked from the suction port 31 through the discharge port 32; And a discharge channel cover portion 40 that covers a space surrounded by the first exhaust port 17A and the second exhaust port 17B, and allows the discharge port 32, the first exhaust port 17A, and the second exhaust port 17B to communicate with each other. . The first plane P1 has a first inner surface Pi1 facing the inside of the casing 10 and a first outer surface Po1 facing the side opposite to the first inner surface Pi1, and the second plane P2 has a second surface facing the inside of the casing 10. The inner surface Pi2 has a second outer surface Po2 facing the opposite side to the second inner surface Pi2. The discharge port 32 is disposed on the first inner surface Pi1 side with respect to the first plane P1, and is disposed on the second inner surface Pi2 side with respect to the second plane P2. In a plan view from the direction along the intersection line L between the first plane P1 and the second plane P2, the discharge surface normal N1 facing the discharge direction of the opening surface S1 of the discharge port 32 and the opening surface of the first exhaust port 17A. An angle T1 formed between S2 and the first exhaust surface normal N2 facing the first outer surface Po1 side is an acute angle, and faces the discharge surface normal N1 and the second outer surface Po2 side of the opening surface S3 of the second exhaust port 17B. The angle T2 between the second exhaust surface normal N3 and the second exhaust surface normal N3 is an acute angle.

According to the above-described configuration, the first exhaust port 17A is provided on the first side portion 11 extending on the first plane P1, and the second exhaust port 17B is provided on the second plane P2 orthogonal to the first plane P1. The opening direction of the first exhaust port 17A and the opening direction of the second exhaust port 17B are different from each other by 90 degrees. Then, in a plan view from the direction along the intersection line L between the first plane P1 and the second plane P2, the angle T1 between the discharge surface normal N1 and the first exhaust surface normal N2 is an acute angle, and The angle T2 between the discharge surface normal N1 and the second exhaust surface normal N3 is an acute angle. Therefore, when the angle T1 between the discharge surface normal N1 and the first exhaust surface normal N2 is a right angle or an obtuse angle, or when the angle T2 between the discharge surface normal N1 and the second exhaust surface normal N3 is a right angle or The difference between the pressure loss in the flow path from the discharge port 32 to the first exhaust port 17A and the pressure loss in the flow path from the discharge port 32 to the second exhaust port 17B can be smaller than in the case of an obtuse angle. . Therefore, the difference between the air blowing performance when the first exhaust port 17A is used and the air blowing performance when the second exhaust port 17B is used can be reduced, and a change in the air blowing performance can be suppressed.

In the present embodiment, the ventilator 1 includes the heat exchanger 60, but is not limited to this. The ventilation device 1 may be provided with the heat exchanger 60 and perform a ventilation operation by simultaneous supply and exhaust without performing heat exchange. In addition, the ventilator 1 may further include a bypass passage that bypasses the primary passage or the secondary passage of the heat exchanger 60. Ordinary ventilation without heat exchange may be performed by this bypass flow path.

Further, the second intake port 18B provided in the casing 10 is disposed on the first side portion 11 provided with the first exhaust port 17A, but the second side provided with the second exhaust port 17B is provided. It may be arranged in the unit 12. That is, the second intake port 18B is arranged so that the opening direction of one of the first exhaust port 17A and the second exhaust port 17B matches the opening direction of the second intake port 18B.

閉塞 Although the closing member for closing the first exhaust port 17A or the second exhaust port 17B is the closing plate 21, it is not limited to this. The closing member is not particularly limited as long as it can close the first exhaust port 17A or the second exhaust port 17B.

In the present embodiment, two exhaust ports, that is, the first exhaust port 17A and the second exhaust port 17B are provided only for the exhaust blower 30, but the present invention is not limited to this. Also, similarly to the exhaust blower 30, two exhaust ports may be provided.

(Embodiment 2)
Next, a ventilation device 2 as a blower according to Embodiment 2 of the present invention will be described with reference to FIG. 9 and FIG. FIG. 9 is a plan view schematically showing a portion including the exhaust blower 230 in the ventilation device 2. FIG. 9 shows a state in which the flanges 20 are provided both around the first exhaust port 17A and around the second exhaust port 17B, similarly to FIG. FIG. 10 is a perspective view of the ventilation device 2 as seen obliquely from below through the first side portion 11 and the sixth side portion 16 of the ventilation device 2. Parts having the same configuration as the ventilation device 1 according to Embodiment 1 described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

換気 The ventilation device 2 according to the present embodiment is different from the ventilation device 1 according to the first embodiment in the arrangement of the exhaust blower. The exhaust blower 30 of the ventilator 1 was disposed such that the opening surface S4 of the suction port 31 was perpendicular to the sixth side 16 corresponding to the bottom surface of the casing 10. On the other hand, in the exhaust blower 230 of the ventilation device 2, as shown in FIGS. 9 and 10, the opening surface of the suction port 231 formed in the fan casing 235 of the exhaust blower 230 corresponds to the bottom surface of the casing 10. It is arranged so as to be parallel to the sixth side portion 16. Note that, also in this case, the discharge port 232 of the exhaust blower 230 is arranged in the same manner as the discharge port 32 of the exhaust blower 30 of the ventilator 1.

換気 In the ventilation device 2 configured as above, the same effect as the ventilation device 1 according to the first embodiment can be obtained.

(Embodiment 3)
Next, a ventilation device 3 which is a blower according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 11 is a plan view schematically showing a portion including the exhaust blower 30 in the ventilation device 3. FIG. 11 shows a state in which the flanges 20 are provided both around the first exhaust port 17A and around the second exhaust port 17B, similarly to FIG. Parts having the same configuration as the ventilation device 1 according to Embodiment 1 described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

The ventilation device 3 according to the present embodiment is different from the ventilation device 1 according to the first embodiment in that the first plane and the second plane are not orthogonal. As shown in FIG. 11, in the ventilation device 3, the second plane P32 is larger than the angle formed between the first inner surface Pi1 of the first plane P1 and the second outer surface Po32 of the second plane P32 by the first plane P1. The first plane P1 and the second plane P32 intersect with the first plane P1 such that the angle between the second plane P32 and the second plane P32 is larger. The second side 312 provided with the second exhaust port 17B extends on the second plane P32. As described above, when the second plane P32 intersects the first plane P1 at an angle other than a right angle, the angle T2 between the discharge surface normal N1 and the second exhaust surface normal N3 is only an acute angle. Alternatively, the angle T2 may be 0 degrees, that is, the discharge surface normal N1 and the second exhaust surface normal N3 may be parallel to each other in the same direction. When the discharge surface normal N1 and the second exhaust surface normal N3 are parallel to each other in the same direction, the angle T1 between the discharge surface normal N1 and the first exhaust surface normal N2 is an acute angle. When the angle T2 between the discharge surface normal N1 and the second exhaust surface normal N3 is an acute angle, the angle T1 between the discharge surface normal N1 and the first exhaust surface normal N2 is an acute angle. Alternatively, the discharge surface normal N1 and the first exhaust surface normal N2 are parallel to each other in the same direction.

換気 With the ventilation device 3 configured as described above, the same effect as the ventilation device 1 according to the first embodiment can be obtained.

In the above description, as the blower, the case of a ventilator having an exhaust blower and an air blower and capable of performing a ventilation operation by simultaneous supply and exhaust is described, but for example, only one blower is provided. It is clear that the present invention can be applied to a simple ventilator or the like that discharges air from the target space.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Additions, omissions, substitutions, and other modifications of the configuration are possible without departing from the spirit of the present invention.

According to the above blower, it is possible to reduce the difference between the blow performance when one exhaust port is used and the blow performance when using another exhaust port, and to suppress a change in the blow performance. it can.

1, 2, 3: ventilator (blower), 10: casing, 11: first side, 12, 312: second side, 17A: first exhaust port, 17B: second exhaust port, 17C: first Three exhaust ports, 18A: first intake port, 18B: second intake port, 19: ridge, 20: flange, 21: obstruction plate (occlusive member), 30, 230: exhaust blower (first blower), 31 , 231: Suction port, 32, 232: Discharge port, 33, 53: Motor, 34, 54: Fan, 35, 55, 235: Fan casing, 40: Blow-off channel cover, 41: Cover body, 50: Air supply blower (second blower), 60: heat exchanger, C1, C2, C3: center, D1, D2: distance, L: intersection, N1: discharge surface normal, N2: first exhaust surface normal , N3: second exhaust plane normal, P1: first plane, P2, P32: second plane, Pi : First inner surface, Pi2, Pi 32: second inner surface, Po1: first outer surface, Po2, Po32: second outer surface, S1, S2, S3, S4: opening surface, T1, T2: corner.

Claims

A first exhaust port is provided, a first side portion extending on the first plane, and a second exhaust port is provided, a second side extending on a second plane intersecting the first plane. And a casing having a first intake port that communicates with the outside,
A first blower arranged in the casing, provided with a suction port and a discharge port communicating with the first suction port, and configured to be able to blow out air sucked from the suction port from the discharge port,
An outlet channel cover that covers a space surrounded by the discharge port, the first exhaust port, and the second exhaust port, and allows the discharge port, the first exhaust port, and the second exhaust port to communicate with each other,
With
The first plane has a first inner surface facing the inside of the casing and a first outer surface facing the opposite side to the first inner surface,
The second plane has a second inner surface facing the inside of the casing and a second outer surface facing the opposite side to the second inner surface,
The discharge port is arranged on the first inner surface side with respect to the first plane, and is arranged on the second inner surface side with respect to the second plane,
In a plan view from the direction along the line of intersection of the first plane and the second plane, the discharge surface normal to the discharge direction of the opening surface of the discharge port and the second of the opening surface of the first exhaust port. The angle between the first exhaust surface normal facing the outer surface side is an acute angle, and the discharge surface normal and the second exhaust surface normal facing the second outer surface side of the opening surface of the second exhaust port. The angle formed is an acute angle, the discharge surface normal and the first exhaust surface normal are parallel to each other in the same direction, and the angle between the discharge surface normal and the second exhaust surface normal is an acute angle. Or, the angle between the discharge surface normal and the first exhaust surface normal is an acute angle, and the discharge surface normal and the second exhaust surface normal are parallel to each other in the same direction. .
The second plane is orthogonal to the first plane,
In a plan view from the direction along the line of intersection of the first plane and the second plane, the angle between the discharge surface normal and the first exhaust surface normal and the discharge surface normal and the second The blower according to claim 1, wherein the angle formed by the normal to the exhaust surface is an acute angle.
In a plan view from the direction along the line of intersection of the first plane and the second plane, the angle between the discharge surface normal and the first exhaust surface normal and the discharge surface normal and the second The blower according to claim 2, wherein the angles formed by the normal to the exhaust surface are both 30 degrees or more and 60 degrees or less.
In a plan view from the direction along the line of intersection of the first plane and the second plane, the angle between the discharge surface normal and the first exhaust surface normal and the discharge surface normal and the second The blower according to claim 3, wherein the angle formed by the normal to the exhaust surface is 45 degrees.
The distance between the center of the opening of the outlet and the center of the opening of the second outlet is the distance between the center of the opening of the outlet and the center of the opening of the first outlet. The blower according to any one of claims 1 to 4, wherein the blower is less than 1.414 times.
The distance between the center of the opening of the outlet and the center of the opening of the second outlet is the distance between the center of the opening of the outlet and the center of the opening of the first outlet. The blower according to claim 5.
The said 1st blower is a centrifugal blower, It is arrange | positioned so that the opening surface of the said suction opening may become perpendicular | vertical with respect to the plane orthogonal to both the said 1st plane and the said 2nd plane. The blower according to any one of the above.
Further comprising a second blower provided in the casing,
The casing further includes a second intake port and a third exhaust port communicating with the outside,
The blower according to any one of claims 1 to 7, wherein the second blower is arranged to blow out the air sucked in through the second intake port to the third exhaust port.
The blower according to claim 8, wherein the second intake port is provided on the first side portion or the second side portion.
The blower according to any one of claims 1 to 9, wherein the first exhaust port and the second exhaust port are each closable by a closing member.