WO2022130519A1

WO2022130519A1 - Blower, indoor unit, and air-conditioning device

Info

Publication number: WO2022130519A1
Application number: PCT/JP2020/046848
Authority: WO
Inventors: 健一迫田; 美優中野; 皓亮宮脇; 翔太森川
Original assignee: 三菱電機株式会社
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2022-06-23
Also published as: JPWO2022130519A1; JP6925571B1

Abstract

This blower comprises a blower unit that includes: an impeller that has a main plate and a plurality of blades disposed on both surfaces of the main plate, and that rotates around a rotary shaft; and a scroll casing that accommodates the impeller and that includes a peripheral wall forming a spiral shape which surrounds the impeller in the rotational direction of the impeller, a side wall which covers the impeller in the axial direction of the rotary shaft and which includes a casing intake opening into which air flows, and an output opening from which air flows out from the opening section as a result of the rotation of the impeller. In the output opening, the length of the opening section in the direction perpendicular to the axial direction is made such that the length at the position of the opening end is shorter than the length at the position corresponding to the main plate in the axial direction.

Description

Blowers, indoor units and air conditioners

This technique relates to a blower, an indoor unit and an air conditioner having the indoor unit. In particular, it relates to a flow path on the outlet side where air is sent out in the scroll casing.

In a refrigeration cycle device such as an air conditioner, a blower that sends out the sucked air is conventionally installed in the indoor unit. The indoor unit houses the blower and the heat exchanger in the main body casing. The blower has a centrifugal fan which is an impeller and a spiral scroll casing as a blower. Further, the scroll casing has a blowout hole and a suction hole. Then, the blowout hole of the scroll casing communicates with the blowout port of the main body casing of the indoor unit. Here, there has been proposed a scroll casing in which a corner portion on the side of the anti-blowing hole is cut out so that air is sucked into the suction hole (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2004-347311

However, the indoor unit of Patent Document 1 described above smoothly takes in the air that has passed through the heat exchanger into the centrifugal fan to improve the efficiency, and is not an improvement related to the air flow on the outlet side. Therefore, depending on the flow of air sent out to the blowout hole, noise caused by the blowout side and deterioration of the blower performance may occur.

In particular, the blower in the indoor unit of Patent Document 1 has a plurality of blowers. Then, in the blower, the suction holes of the blower portions are arranged so as to face each other. As described above, if a large number of blower portions are arranged in a limited space in order to obtain a required air flow rate, the distance between the suction holes in each blower portion becomes smaller. Therefore, the airflow upstream in the suction hole is biased in the axial direction of the rotation axis of the centrifugal fan. Therefore, the efficiency of the blower tends to decrease due to the large eddy current in the scroll casing, the large noise, and the large power consumption.

In order to solve the above-mentioned problems, it is an object of the present invention to provide a blower, an indoor unit and an air conditioner capable of achieving both improvement of ventilation performance by reducing noise and improving efficiency.

The blower according to this disclosure has a main plate and a plurality of blades arranged on both sides of the main plate, and has an impeller that rotates about a rotation axis, a spiral wall that surrounds the impeller in the rotation direction of the impeller, and rotation. It covers the impeller in the axial direction of the shaft, has a side wall having a casing suction port for air to flow in, and an outlet opening for air to flow out from the opening due to rotation of the impeller, and has a scroll casing for accommodating the impeller. The outlet opening is provided with a blower, and the length of the opening in the direction perpendicular to the axial direction is shorter at the position of the opening end than the length of the position corresponding to the main plate in the axial direction. It is composed.

Further, the indoor unit according to this disclosure includes a main body casing having a main body suction port and a main body outlet, a heat exchanger installed inside the main body casing, and a heat exchanger in the air flow inside the main body casing. It is equipped with the above-mentioned blower installed on the downstream side of the pipe.

Further, the air conditioner according to this disclosure is provided with the above-mentioned indoor unit.

According to this disclosure, the outlet opening is the length of the position of the opening end in the direction perpendicular to the axial direction, rather than the length of the opening in the position corresponding to the main plate in the axial direction. The sword is shorter. Therefore, the opening area of the opening surface at the opening end of the outlet opening becomes small, and the wind speed becomes high. Therefore, by reducing the difference from the wind speed on the main plate side, the wind speed distribution at the opening portion of the outlet opening can be made more uniform. Therefore, the blower can realize low noise and improvement of blowing efficiency.

It is a figure explaining an example of the indoor unit 100 which concerns on Embodiment 1. FIG. It is a perspective view explaining the main part of the blower 2 which has the blower part 2A which concerns on Embodiment 1. FIG. It is a figure explaining the main part of the blower part 2A which concerns on Embodiment 1. FIG. It is a figure explaining the outlet opening 12 which the scroll casing 5 which concerns on Embodiment 1 has. It is a figure explaining the main part of the scroll casing 5 which concerns on Embodiment 2. FIG. It is a figure explaining another example of the main part of the scroll casing 5 which concerns on Embodiment 2. FIG. It is a figure explaining the main part of the blower 2 which concerns on Embodiment 3. FIG. It is a figure explaining the main part of the blower 2 which concerns on Embodiment 4. FIG. It is a figure which shows the structural example of the air conditioner which concerns on Embodiment 5.

Hereinafter, the blower, the indoor unit, and the air conditioner according to the embodiment will be described with reference to drawings and the like. In the following drawings, those with the same reference numerals are the same or equivalent thereof, and are common to all the texts of the embodiments described below. The form of the component represented in the entire specification is merely an example, and is not limited to the form described in the specification. In particular, the combination of components is not limited to the combination in each embodiment, and the components described in other embodiments can be applied to another embodiment. Further, in the following description, the upper side in the figure will be referred to as "upper side" and the lower side will be referred to as "lower side". Furthermore, for ease of understanding, directional terms (eg, "right", "left", "front", "rear", etc.) are used as appropriate, but are for illustration purposes only. The contents of the blower, the indoor unit and the air conditioner according to the form are not limited. Further, in the indoor unit, the side where the main body outlet, which will be described later, can be seen is the front (front) side. Therefore, the opening surface at the outlet opening of the blower, which will be described later, is the front surface. Further, the vertical direction when viewed from the front side is the height direction, and the left and right direction is the width direction. As will be described later, the width direction is the axial direction of the rotation axis of the impeller rotating in the blower, and the height direction is along the direction perpendicular to the axial direction. The height direction also follows the radial direction of the impeller. Here, the high and low pressures and temperatures are not fixed in relation to the absolute values, but are relatively fixed in terms of the state and operation of the device and the like. Then, in the drawings, the relationship between the sizes of the constituent members may differ from the actual one.

Embodiment 1.
FIG. 1 is a diagram illustrating an example of an indoor unit 100 according to the first embodiment. Further, FIG. 2 is a perspective view illustrating a main part of the blower 2 having the blower portion 2A according to the first embodiment.

The indoor unit 100 has an indoor heat exchanger 6 and a blower 2 inside the main body casing 1. Further, the main body casing 1 has a main body suction port 7 and a main body outlet 8. The main body suction port 7 is an opening portion that communicates inside and outside in order to take in indoor air (hereinafter referred to as indoor air), which is an air conditioning target space, into the inside of the main body casing 1. Further, the main body outlet 8 is an opening portion that communicates inside and outside in order to send air harmonious air (hereinafter referred to as air-conditioned air) or the like from the inside of the main body casing 1 into the room. The conditioned air shall include air blown without heat exchange by the indoor heat exchanger 6. Here, in the indoor unit 100 of the first embodiment, the dimensions of the main body suction port 7 and the main body outlet 8 in the width direction and the dimensions of the indoor heat exchanger 6 in the width direction are substantially the same. Will be done. Then, in the flow of air passing through the indoor unit 100, the indoor heat exchanger 6 is arranged in a substantially inverted V shape at a position on the downstream side of the main body suction port 7. Further, a blower 2 is arranged at a position on the downstream side of the indoor heat exchanger 6 and on the upstream side of the main body outlet 8.

The indoor heat exchanger 6 creates air-conditioned air by exchanging heat between the indoor air and the refrigerant. The indoor heat exchanger 6 of the first embodiment includes, for example, a plurality of fins laminated at predetermined intervals and a plurality of heat transfer tubes penetrating each fin in the stacking direction. The indoor heat exchangers 6 are arranged on the front side and the back side in the main body casing 1, respectively.

The blower 2 takes in the indoor air into the main body casing 1 and creates an air flow that blows the conditioned air into the room. As shown in FIG. 2, the blower 2 has a plurality of blower units 2A, a shaft 3, and a drive motor 9. As will be described later, the drive motor 9 is rotationally driven based on an instruction from a control device (not shown), and by rotating the shaft 3, the impeller 4 of the plurality of blower units 2A is rotated. Therefore, the shaft 3 becomes the rotating shaft 10 of the impeller 4, which will be described later. Further, the drive motor 9 of the indoor unit 100 is arranged on the side surface side in the main body casing 1 so as not to obstruct the flow of air passing through the main body casing 1. A plurality of blower portions 2A including the impeller 4 and the scroll casing 5 accommodating the impeller 4 are arranged along the shaft 3 at predetermined intervals.

FIG. 3 is a diagram illustrating a main part of the blower unit 2A according to the first embodiment. The impeller 4 is a member that is rotated by the rotational drive of the drive motor 9. The impeller 4 forcibly sends out air toward the outside in the radial direction of the impeller 4 by the centrifugal force generated by the rotation. The impeller 4 is configured as a centrifugal type or a mixed flow type. The impeller 4 has a main plate 13 and a plurality of blades 14. The main plate 13 is a disk rotatably provided around the rotation shaft 10. One end of the plurality of blades 14 is connected and fixed on both sides of the main plate 13 on the circumference centered on the rotation shaft 10 and arranged. Each blade 14 is provided in a direction along the axial direction of the rotating shaft 10 (direction toward the casing suction port 11) from the surface of the main plate 13. Each blade 14 is provided in the vicinity of the outer peripheral edge on the surface of the main plate 13 at a constant distance from each other in parallel with the radial direction or inclined at a predetermined angle with respect to the radial direction.

Each blade 14 is connected and fixed by a connecting portion 17 at an end on the casing suction port 11 side, which is an end opposite to the end connected to the main plate 13 of each blade 14. The connecting portion 17 is a series of annular members having a diameter capable of connecting the ends of the casing suction ports 11 of the plurality of blades 14. The connecting portion 17 connects the ends of the plurality of blades 14 to maintain the positional relationship of each blade 14 and reinforce the plurality of blades 14. Here, the connecting portion 17 may be an annular plate material having a width capable of covering the end portions of each blade 14. Further, the connecting portion 17 may be an annular member that connects the outer peripheral side of each blade 14. Here, it is assumed that the impeller 4 of the first embodiment has the same length of each blade 14 connected to both sides of the main plate 13. Therefore, in the blower 2 of the first embodiment, the main plate 13 is located at the central portion of the impeller 4 in the axial direction of the rotating shaft 10 which is the width direction.

The impeller 4 has such a configuration, and by rotating around the rotation shaft 10, the air in the space surrounded by the main plate 13 and the plurality of blades 14 is passed between the blades 14 in the radial direction. Can be sent to the outside of.

The scroll casing 5 is, for example, a hollow cylinder that forms a substantially cylindrical space inside, and is a scroll-type chassis having a spiral shape. The scroll casing 5 has a size that can substantially surround the entire impeller 4 inside. The scroll casing 5 has a wall surface that rectifies the air sent out by the impeller 4 to the outside in the radial direction and sends it out in one direction from the outlet opening 12 described later. The scroll casing 5 is arranged orthogonal to the rotation axis 10 to cover the impeller 4, connects two end faces 15 facing each other and the outer edge portion of each end face 15, and extends to the outer periphery of the impeller 4. It has a spiral-shaped peripheral wall 16 that surrounds the impeller 4 in the rotational direction. Each end face 15 has a casing suction port 11. The casing suction port 11 is an opening formed in a region surrounded by an end portion of the impeller 4 so that air flowing into the scroll casing 5 can flow between the impeller 4 and the outside of the scroll casing 5. It is a part. Here, as described above, the main plate 13 of the impeller 4 is located at the central portion of the impeller 4 in the axial direction of the rotating shaft 10. Since the distance between each end surface 15 and the impeller 4 is substantially the same, the main plate 13 is located at the central portion of the scroll casing 5 in the axial direction of the rotating shaft 10.

Further, the gap between the peripheral wall 16 of the scroll casing 5 and the outer peripheral end portion of the impeller 4 expands at a predetermined ratio in the rotation direction of the impeller 4 from the position where the gap between the peripheral end portion of the impeller 4 is the smallest. .. The peripheral wall 16 is formed up to a predetermined position in the rotation direction of the impeller 4.

FIG. 4 is a diagram illustrating an outlet opening 12 included in the scroll casing 5 according to the first embodiment. FIG. 4 shows the positional relationship of each element when the blower portion 2A is viewed from the front side. The scroll casing 5 of the blower portion 2A has an outlet opening 12. The outlet opening 12 is an opening formed so that air can flow between the inside and the outside of the scroll casing 5. Therefore, the outlet opening 12 has an opening surface with a communication hole that serves as a flow path for air flowing out of the scroll casing 5. Here, the blower 2 of the first embodiment is arranged so that the outlet opening 12 of each blower portion 2A and the main body outlet 8 of the main body casing 1 of the indoor unit 100 communicate with each other.

Here, when the opening surface of the scroll casing 5 is viewed from the front side, the length of the opening portion in the height direction of the opening portion 12 is in the axial direction of the rotating shaft 10 in the width direction. The length of the position corresponding to the position of the main plate 13 of the impeller 4 is maximized. Then, in the first embodiment, the length thereof is gradually reduced toward the opening end portion on the casing suction port 11 side of the outlet opening portion 12.

As shown in FIG. 4, regarding the shape of the opening surface of the outlet opening 12 of the first embodiment, the end height L, which is the length in the height direction of the opening end in the axial direction of the rotating shaft 10, is rotated. It is shorter than the maximum height Lmax, which is the length in the height direction at the central portion of the shaft 10 in the axial direction (Lmax> L). Here, in particular, the outlet opening 12 is configured to have a shape in which the length is gradually shortened from the portion having the maximum height Lmax to the end portion. By making the end height L shorter than the maximum height Lmax, the opening area at the opening end of the outlet opening 12 is reduced and the speed of the passing air is increased. Therefore, in the blower 2 in which the direction in which the air is sucked in and the direction in which the air is blown out are different, the difference in the flow velocity between the central portion of the outlet opening 12 having a high wind speed and the opening end portion having a slow wind speed is reduced. Here, in the impeller 4, the position where the maximum height Lmax of the rotary shaft 10 of the outlet opening 12 in the axial direction changes depending on the position of the rotary shaft 10 of the main plate 13 in the axial direction.

As described above, in the blower 2 of the first embodiment, the blower portions 2A are arranged so that the adjacent casing suction ports 11 face each other. Here, the operation of the indoor unit 100 having the blower 2 configured as in the first embodiment will be described. When the drive motor 9 is rotationally driven, the impellers 4 of the plurality of blower portions 2A are rotated in the blower 2 installed inside the main body casing 1. The indoor air flows from the main body suction port 7 into the indoor heat exchangers 6 arranged on the front side and the back side of the main body casing 1. When the inflowing indoor air passes through the indoor heat exchanger 6, it exchanges heat with the refrigerant flowing inside the plurality of heat transfer tubes penetrating the indoor heat exchanger 6. The heat-exchanged indoor air becomes air-conditioned air and reaches the casing suction port 11. The conditioned air that has flowed into the inside of the scroll casing 5 from the casing suction port 11 is changed in the direction of flow by the impeller 4 to the radial direction of the impeller 4, passes through the inside of the scroll casing 5, and is transmitted from the outlet opening 12. Be sent out. The conditioned air sent out from the outlet opening 12 is blown into the room from the main body outlet 8 communicating with the outlet opening 12.

Next, the effect of the indoor unit 100 configured as in the first embodiment will be described. The scroll casing 5 in the blower portion 2A of the first embodiment is configured such that the flow path area of the conditioned air gradually expands in the direction in which the conditioned air flows in the gap between the peripheral wall 16 and the outer peripheral end portion of the impeller 4. .. Therefore, as the conditioned air flows through the scroll casing 5, the static pressure of the air can be efficiently increased.

Generally, the flow direction of the air sucked from the casing suction port 11 in the direction of the rotating shaft 10 is changed from the axial direction to the radial direction by the centrifugal force due to the rotational movement of the impeller 4. Therefore, the air in the scroll casing 5 has a slow flow on the casing suction port 11 side and a fast flow on the main plate 13 side due to the inertia of the flowing air. Therefore, the velocity distribution of air becomes non-uniform. When the velocity distribution of the air becomes non-uniform, the effect of increasing the static pressure of the air by the scroll casing 5 is reduced, and the blowing performance is deteriorated. Further, when the drive condition is small, the air on the casing suction port 11 side where the wind speed is slow may not flow out from the outlet opening 12 and may flow back to the impeller 4. Therefore, noise may be generated and dew dripping due to dew condensation may occur. This non-uniformity of velocity distribution becomes large when a plurality of blower portions 2A are installed so that the casing suction ports 11 face each other. In particular, when the distance between the casing suction ports 11 of the adjacent blower portions 2A becomes short, the velocity distribution becomes non-uniform.

Therefore, according to the blower 2 of the first embodiment, in the scroll casing 5, the width of the outlet opening 12 in the direction perpendicular to the rotation axis 10 is from the main plate 13 having a high wind speed to the opening end on the side of the casing suction port 11 having a slow wind speed. It is composed of a shape that gradually shrinks toward the part. Therefore, in the blower portion 2A, the wind speed distribution of the air sent from the outlet opening portion 12 becomes more uniform, and it is possible to improve the blower performance and realize low noise. Here, the case where the blower 2 of the first embodiment includes a plurality of blower portions 2A in which the casing suction ports 11 face each other, which can obtain a higher effect, has been described, but the present invention is not limited to this. The same effect can be obtained even with the blower 2 provided with one blower unit 2A.

Embodiment 2.
FIG. 5 is a diagram illustrating a main part of the scroll casing 5 according to the second embodiment. As shown in FIG. 5, in the scroll casing 5 of the second embodiment, as described in the first embodiment, the length of the opening end portion of the rotating shaft 10 in the axial direction of the outlet opening portion 12 is the main plate 13. It is configured to gradually decrease from the width at the position of.

Further, the scroll casing 5 of the second embodiment has a length from the position corresponding to the main plate 13 of the impeller 4 on the axial direction of the rotary shaft 10 to the opening end on the casing suction port 11 side in the outlet opening 12. The maximum length is Cmax. Further, let C be a length from the axial position of the rotary shaft 10 on which the main plate 13 of the impeller 4 is installed to the axial position of the rotary shaft 10 of the casing suction port 11. At this time, in the scroll casing 5 of the second embodiment, as shown in FIG. 5, the maximum length Cmax of the outlet opening 12 is longer than the length C (maximum length Cmax> length C). It constitutes the outlet opening 12. In the indoor unit 100 having the blower portion 2A of the second embodiment, the air having a high flow velocity in the central portion of the scroll casing 5 on the main plate 13 side of the scroll casing 5 is directed in the axial direction of the rotation shaft 10 at the outlet opening 12. spread. Therefore, the static pressure of the air increases more efficiently.

FIG. 6 is a diagram illustrating another example of the main part of the scroll casing 5 according to the second embodiment. For example, as shown in FIG. 6, in the outlet opening 12, the position where the maximum length Cmax is obtained is the impeller 4 rather than the center O in the height direction corresponding to the position of the main plate 13 in the axial direction of the rotating shaft 10. It may be configured at a position far from. At this time, as shown in FIG. 6, the position of the scroll casing 5 where the maximum length Cmax is obtained in the direction of the rotation axis 10 when the opening surface of the outlet opening 12 is viewed from the front side is the outlet opening 12. It is configured to be located closer to the peripheral wall 16 than the center O in the height direction of.

For example, the air that has passed through the impeller 4 flows out toward the outside in the radial direction due to the centrifugal force of the impeller 4. Therefore, the velocity of air on the lower side closer to the peripheral wall 16 than the center O in the height direction of the outlet opening 12 is higher. On the other hand, the velocity of the air above the center O in the height direction of the outlet opening 12 becomes slower. With the configuration as shown in FIG. 6, the flow path is narrowed above the center O of the outlet opening 12 where the air velocity is slowed down. Further, the flow path expands below the center O of the outlet opening 12 where the air velocity becomes high. Therefore, by making the shape of the outlet opening 12 such a configuration, the blower portion 2A according to the second embodiment can further alleviate the non-uniformity of the air velocity in the outlet opening 12, and the blower performance. Can be improved. Here, the blower 2 of the second embodiment has also been described based on the case where a plurality of blower units 2A are provided, but the present invention is not limited to this. The same effect can be obtained even with the blower 2 provided with one blower unit 2A.

Embodiment 3.
FIG. 7 is a diagram illustrating a main part of the blower 2 according to the third embodiment. In the blower 2 of the third embodiment, the blower portions 2A according to the above-mentioned second embodiment are arranged side by side in the width direction. FIG. 7 shows the main parts of the two adjacent blower units 2A among the plurality of blower units 2A of the blower 2.

As shown in FIG. 7 and the like, the blower 2 is arranged so that the casing suction ports 11 of the adjacent blower portions 2A face each other. Further, as described in the second embodiment, the scroll casing 5 of the blower portion 2A has a maximum length Cmax of the outlet opening 12 larger than the length C. Therefore, the blower 2 of the third embodiment is configured such that at the outlet opening 12 of each blower portion 2A, the opening end portions of the rotating shaft 10 in the axial direction are in contact with each other of the adjacent blower portions 2A.

By configuring the blower 2 in the third embodiment, it is possible to further alleviate the non-uniformity of the air velocity in the axial direction of the rotating shaft 10 in the main body outlet 8 of the blower 2. As a result, the blower 2 of the third embodiment can have a wide air flow according to the dimension in the width direction of the indoor unit 100. Therefore, even when the airflow sent into the room from the main body outlet 8 of the indoor unit 100 directly hits the user in the room, the user is less likely to feel the airflow and can maintain comfort. Further, the indoor unit 100 can send out a wide range of airflow into the room. The blower 2 in the third embodiment does not interfere with the airflow control for controlling the direction of the airflow, which is usually performed by the flap (not shown) installed in the vicinity of the main body outlet 8 in the indoor unit 100.

Here, in FIG. 7, it has been described that the open end portions of the rotating shaft 10 in the axial direction are in contact with each other of the adjacent blower portions 2A, but the present invention is not limited to this. The outlet openings 12 that are in contact with each other at the outlet openings 12 of the adjacent blower portions 2A may be removed and communicated with each other to integrate the outlet openings 12.

Embodiment 4.
FIG. 8 is a diagram illustrating a main part of the blower 2 according to the fourth embodiment. FIG. 8 shows two integrated blower units 2A as one set. In the blower 2 of the fourth embodiment, a plurality of sets of blower units 2A are arranged side by side in the width direction of the indoor unit 100.

As shown in FIG. 8, in the blower 2 of the fourth embodiment, in the impeller 4 of the two blower portions 2A in one set, the blades 14A installed on the side facing the main plate 13 are integrated into two units. It straddles the blower portion 2A. Further, in the blower 2 of the fourth embodiment, each main plate 13 in the two blower portions 2A in one set is connected to the shaft 3 at the position of the casing suction port 11 on the opposite side.

Then, the blower 2 of the fourth embodiment has an additional outlet opening 18 between each outlet opening 12 of the two blower portions 2A in one set. Therefore, the above-mentioned blade 14A constitutes a once-through fan between the two blower portions 2A.

In the indoor unit 100 configured as in the fourth embodiment, the air sucked from the main body suction port 7 by the rotation of the drive motor 9 passes through the indoor heat exchanger 6 and reaches the blower unit 2A. A part of the reached air passes through the casing suction port 11 through the gap of the blower portions 2A installed so as to face each other, flows into the inside of the scroll casing 5 by the centrifugal force of the impeller 4, and flows into the inside of the scroll casing 5. Is blown out into the air-conditioned space. On the other hand, a part of the air that has reached the blower portion 2A passes through the blade 14A configured as a once-through fan and is blown out to the air-conditioned space from the additional outlet opening 18.

In general, the pressure rise of the centrifugal impeller is large. The once-through fan can obtain a large amount of air volume, although the pressure rise is small. In the indoor unit 100 configured as in the fourth embodiment, since the gap between the facing air blower portions 2A is configured as a once-through fan, the air volume can be increased. Further, the indoor unit 100 can achieve both an increase in pressure due to the centrifugal impeller 4 and the scroll casing 5. Therefore, the power consumption of the blower 2 and the indoor unit 100 can be reduced. Further, the outlet opening 12 and the additional outlet opening 18 are continuously installed side by side in the width direction of the indoor unit 100. Therefore, a wide airflow corresponding to the dimension in the width direction of the indoor unit 100 can be obtained, and comfort and airflow controllability do not deteriorate.

Embodiment 5.
FIG. 9 is a diagram showing a configuration example of the air conditioner according to the fifth embodiment. In the air conditioner of FIG. 9, the outdoor unit (outdoor unit) 200 and the indoor unit (indoor unit) 100 described in the first embodiment or the like are connected by a refrigerant pipe 300. The outdoor unit 200 includes a compressor 210, a four-way valve 220, an outdoor heat exchanger 230, and an expansion valve 240.

The compressor 210 compresses and discharges the sucked refrigerant. Here, although not particularly limited, the compressor 210 changes the capacity (amount of refrigerant delivered per unit time) of the compressor 210 by arbitrarily changing the drive frequency by, for example, an inverter circuit or the like. You may be able to do it. The four-way valve 220 is a valve that switches the flow of the refrigerant between the cooling operation and the heating operation, for example.

The outdoor heat exchanger 230 in the fifth embodiment exchanges heat between the refrigerant and the outdoor air. For example, the outdoor heat exchanger 230 functions as an evaporator during the heating operation to evaporate and vaporize the refrigerant. Further, the outdoor heat exchanger 230 functions as a condenser during the cooling operation to condense and liquefy the refrigerant.

The expansion valve 240 of the throttle device or the like decompresses the refrigerant and expands it. For example, when the expansion valve 240 is an electronic expansion valve or the like, the opening degree is adjusted based on an instruction from a control device (not shown) or the like.

As described above, by connecting the indoor unit 100 having the blower 2 and the outdoor unit 200 described in the previous embodiments by the refrigerant pipe 300 to form the air conditioner, the ventilation performance is improved and the noise is low. It can be changed.

1 Main body casing, 2 Blower, 2A Blower, 3 Shaft, 4 Impeller, 5 Scroll casing, 6 Indoor heat exchanger, 7 Main body suction port, 8 Main body outlet, 9 Drive motor, 10 Rotating shaft, 11 Casing suction port , 12 outlet opening, 13 main plate, 14, 14A blade, 15 end face, 16 peripheral wall, 17 connecting part, 18 additional outlet opening, 100 indoor unit, 200 outdoor unit, 210 compressor, 220 four-way valve, 230 outdoor heat exchange Vessel, 240 expansion valve, 300 refrigerant piping.

Claims

An impeller having a main plate and a plurality of blades arranged on both sides of the main plate and rotating around a rotation axis,
By rotating the impeller from a spiral wall surrounding the impeller in the rotation direction of the impeller, a side wall having a casing suction port for covering the impeller in the axial direction of the rotation axis, and an opening portion, and an opening portion. A blower having an outlet opening through which the air flows out and a scroll casing for accommodating the impeller.
In the outlet opening, the length of the opening portion in the direction perpendicular to the axial direction is shorter at the position of the opening end portion than the length of the position corresponding to the main plate in the axial direction. Blower configured.
The first aspect of the present invention, wherein the outlet opening is configured such that the maximum length of the opening portion in the axial direction is longer than the length between the main plate of the impeller and the suction port of the impeller in the axial direction. Blower.
In the direction perpendicular to the axial direction, the outlet opening is located at a position where the distance between the impeller and the position where the length of the opening portion is maximum in the axial direction corresponds to the main plate in the axial direction. The blower according to claim 1 or 2, wherein the position of the center of the length of the opening portion in a direction perpendicular to the axial direction is longer than the distance between the impeller and the impeller.
A plurality of the air blowers are arranged so that the suction ports face each other.
The blower according to any one of claims 1 to 3, wherein the opening ends of the outlet openings in the axial direction of the rotating shaft are in contact with each other.
A plurality of the air blowers are arranged so that the suction ports face each other.
The blower according to any one of claims 1 to 3, wherein the opening end portions of the outlet openings are communicated with each other in the axial direction of the rotating shaft.
A plurality of the air blowers are arranged so that the suction ports face each other.
In the adjacent blowers, integrally formed blades are arranged on the main plate of each of the impellers, and the air flows out between the respective outlet openings due to the rotation of the integrally formed blades. The blower according to any one of claims 1 to 5, which has an outlet opening.
A main body casing having a main body suction port and a main body outlet,
The heat exchanger installed inside the main body casing,
An indoor unit including the blower according to any one of claims 1 to 6, which is installed on the downstream side of the heat exchanger in the air flow inside the main body casing.
An air conditioner including the indoor unit according to claim 7.