TWI779393B - Air conditioner - Google Patents

Abstract

The air conditioner includes: a centrifugal blower, which includes a fan driven to rotate; and a volute housing, which accommodates the fan, and has a volute-shaped peripheral wall and a side wall for setting an air suction port; the driving source is a pair of fans. The driving force is given; the heat exchanger is arranged at a position opposite to the air discharge port formed in the volute casing; and the frame body is used to accommodate the centrifugal blower, the driving source and the heat exchanger, and is arranged in the The air supply chamber of the fan and the heat exchange chamber equipped with the heat exchanger have a frame body with partitions to separate the inside, forming a frame suction port through which the air flowing into the air supply chamber passes, and a passage through which the air flowing out of the heat exchange chamber passes. The blowing port of the frame body; the volute casing has: the first box part has a discharge part forming the discharge port, and the discharge part is fixed to the partition; the second box part has a peripheral wall opposite to the suction port of the frame body , and is detachably fixed on the first box part; and the fixing part is set on the side wall and fixes the first box part and the second box part; it is the joint part of the first box part and the second box part The division part is formed on the side wall and the peripheral wall, and is formed on the part other than the discharge part; the fixed part is provided at the point of view viewed from the axial direction of the rotation shaft of the fan, surrounded by the first imaginary line and the suction port of the frame and the first virtual line is a virtual straight line connecting each of the two ends of the suction inlet of the frame body and the rotating shaft.

Description

air conditioner

This disclosure relates to an air conditioner with a centrifugal blower.

Conventional air conditioners have a heat exchanger and a centrifugal fan with a volute casing between an air inlet and an air outlet. The air conditioner is rotated by the fan accommodated in the volute casing, and the air inhaled from the suction port of the air conditioner flows into the fan along the bell-shaped mouth formed by the suction port of the volute casing. Then, the airflow discharged from the fan is boosted in the scroll casing, discharged from the scroll casing, passes through the heat exchanger, and is discharged from the outlet of the air conditioner to the air-conditioned space.

The scroll case used in the air conditioner is sometimes divided into two parts in order to house the fan. The scroll casing divided into two elements is considered to be easy to manufacture, and the member constituting the discharge port of the scroll casing has a divided part where the two elements are joined, and the suction port of the scroll casing is on the opposite side. The side further has another divided portion (for example, refer to Patent Document 1). In the air conditioner of Patent Document 1, in order to fix the two divided elements to each other, fixing parts are provided on the wall surface of the scroll casing near each divided part.

[Prior patent documents] [Patent Document]

Patent Document 1: Japanese Patent Laid-Open No. 2005-69177

However, the velocity of the airflow flowing into the suction port of the scroll casing becomes faster on the suction port side of the air conditioner. Therefore, in the air conditioner of Patent Document 1, the air flow flowing in the bell mouth is separated due to the interference between the fixed part provided on the suction side of the air conditioner and the air flow, and the air volume of the gas flowing into the volute casing decreases. Condition.

The present disclosure is intended to solve the above-mentioned problems, and an object thereof is to obtain an air conditioner capable of suppressing a decrease in the volume of gas flowing into a scroll housing of a centrifugal blower.

The air conditioner disclosed in this disclosure includes: a centrifugal blower, which includes a fan driven to rotate; and a volute housing, which accommodates the fan, and has a volute-shaped peripheral wall and a side wall for setting an air suction port; a driving source, The driving force is given to the fan; the heat exchanger is arranged at a position opposite to the discharge port of the air formed in the scroll casing; and the frame is used to accommodate the centrifugal blower, the driving source and the heat exchanger, In addition, there is a frame body with a partition plate separating the inside of the air supply chamber where the fan is arranged and the heat exchange chamber where the heat exchanger is arranged to form a frame suction port through which the air flowing into the air supply chamber passes, and the air that flows out of the heat exchange chamber The blowing outlet of the frame passed through; the volute shell has: the first box part has a discharge part forming the discharge port, and the discharge part is fixed to the partition; the second box part has a frame opposite to the suction port of the frame to the surrounding wall, and is detachably fixed to the first box part; and the fixed part is set on the side wall, and fixes the first box part and the second box part; it is between the first box part and the second box part The dividing part of the joint part is formed on the side wall and the surrounding wall, and is formed on the part other than the discharge part; the fixed part is provided at the point of view from the axial direction of the fan's rotating shaft, which is drawn from the first imaginary line and the frame. The part outside the area surrounded by the mouth, and the first imaginary line is a virtual straight line connecting each of the two ends of the suction inlet of the frame and the rotating shaft.

According to the present disclosure, the centrifugal blower has a fixing part that fixes the first case part and the second case part to each other. This fixing part is arranged on the side wall, and is in the axial direction from the rotating shaft of the fan The viewing point of view is set outside the area surrounded by the first imaginary line and the frame suction port, and the first virtual line is a virtual straight line connecting each of the two ends of the frame body suction port and the rotating shaft. In the air conditioner, since the fixed part is located far away from the air conditioner's frame suction port, it is possible to suppress interference between the fast airflow flowing in from the frame body suction port and the fixed part. Therefore, the air conditioner suppresses the separation of the air flow flowing in the bell mouth, and suppresses the reduction of the air volume of the gas flowing into the scroll casing.

1: centrifugal blower

1A: centrifugal blower

1B: Centrifugal Blower

1C: centrifugal blower

1L: centrifugal blower

2: fan

2a: Motherboard

2a1: peripheral part

2b: Shaft

2d: blade

2e: Suction port

3: bell mouth

4: Vortex housing

4B: Scroll housing

4L: Scroll housing

4a: side wall

4a1: 1st side wall

4a2: 2nd side wall

4c: Peripheral wall

4c11: 1st end

4c12: 2nd end

5: Suction port

5a: the first inner edge

5b: The second inner edge

6: Drive source

6a: output shaft

9a: Motor bracket

10: Heat exchanger

11: Motherboard

13: Insulation material

16: frame

16D: frame

16E: frame

16a: upper face

16b: lower part

16b1: Entrance wall

16c: side part

16c1: entrance wall

16c2: Exit wall

17: Frame outlet

18: Frame intake

18a: end

18b: end

18d: end

18e: end

19: Partition

20: fixed part

20A: The first fixed part

20B: The second fixed part

20L: fixed part

21: The first engaging part

22: The second engaging part

25: Air supply room

26: Heat exchange chamber

40: Air conditioning unit

40A: Air conditioning unit

40B: Air conditioning unit

40C: air conditioning unit

40D: Air conditioning unit

40E: Air conditioning unit

40L: air conditioning unit

41: volute

41a: scroll start

41b: Vortex end

42: discharge part

42L: discharge part

42a: discharge port

42b: Extension board

42c: Diffuser plate

42d: edge

42e: Boundary

43: Tongue

45: The first box part

46: The second box part

47L: Lower box part

48L: Upper box part

60: Division

60L: Division

61: The first division

62: The second division

65: plane part

AR: Airflow

BD: dotted line

CL: 1st virtual line

EL1: horizontal straight line

EL2: Vertical straight line

FL: virtual line

IR: Arrow

M1: middle position

OR:arrow

R: turn

RS: shaft

SA: area

SB: area

SC: area

SE: area

SL1: Baseline 1

SL2: 2nd Baseline

TL: 2nd virtual line

[FIG. 1] It is a perspective view of the centrifugal blower of Embodiment 1. [FIG.

[ Fig. 2 ] is a schematic view of the inside of the centrifugal blower according to Embodiment 1 viewed from the axial direction of the rotating shaft.

[ Fig. 3 ] is a schematic view of the outside of the centrifugal blower according to Embodiment 1 viewed from the axial direction of the rotating shaft.

[ Fig. 4] Fig. 4 is a perspective view schematically showing an example of the air conditioner according to the first embodiment.

[ Fig. 5 ] is a schematic diagram showing an example of the internal structure of the air conditioner according to the first embodiment.

[FIG. 6] It is a side view which schematically shows an example of the internal structure of the air-conditioning apparatus of Embodiment 1. [FIG.

[ Fig. 7] Fig. 7 is a side view schematically showing the internal structure of a modified example of the air conditioner of the first embodiment.

[ Fig. 8 ] A schematic diagram of a centrifugal blower of a comparative example viewed from the axial direction of the rotating shaft.

[ Fig. 9 ] is a schematic diagram of a segmented centrifugal blower of a comparative example.

[ Fig. 10 ] is a schematic view showing an example of the internal structure of an air conditioner of a comparative example.

[FIG. 11] It is a side view which schematically shows an example of the internal structure of the air-conditioning apparatus of Embodiment 2. [FIG.

[FIG. 12] It is a side view which schematically shows an example of the internal structure of the air-conditioning apparatus of Embodiment 3. [FIG.

[FIG. 13] It is a side view which schematically shows an example of the internal structure of the air-conditioning apparatus of Embodiment 4. [FIG.

[FIG. 14] It is a side view which schematically shows an example of the internal structure of the air-conditioning apparatus of Embodiment 5. [FIG.

[FIG. 15] It is a side view which schematically shows an example of the internal structure of the air-conditioning apparatus of Embodiment 6. [FIG.

Hereinafter, an air conditioner 40 according to an embodiment of the present disclosure will be described with reference to the drawings and the like. In addition, in the drawings including FIG. 1 and below, the relation of relative dimensions, shapes, etc. of each component may be different from the actual ones. In addition, in the following drawings, those attached with the same symbols are the same or equivalent, and this is the same throughout the entire patent specification. Also, in order to make it easy to understand, terms indicating directions (such as "up", "down", "right", "left", "front", "back", etc.) are used appropriately, but these expressions are for convenience of explanation , are described as such, and are not intended to limit the arrangement and direction of devices or elements.

Embodiment 1 [Centrifugal Blower 1]

Fig. 1 is a perspective view of a centrifugal blower 1 according to Embodiment 1. Fig. 2 is a schematic view of the inside of the centrifugal blower 1 according to Embodiment 1 viewed from the axial direction of the rotating shaft RS. Fig. 3 is a schematic view of the outside of the centrifugal blower 1 according to Embodiment 1 viewed from the axial direction of the rotating shaft RS. In addition, in FIG. 2 , illustration of the bell mouth 3 is omitted in order to explain the internal structure of the centrifugal fan 1 .

The centrifugal blower 1 is a double-suction type centrifugal blower 1 that is positioned in the axial direction of the rotating shaft RS of the fan 2 and sucks air from both sides. The structure of the centrifugal blower 1 is because one surface side of the main board 2a is the same as the other surface side, so using FIG. 1, the structure of the centrifugal blower 1 will be described, and the centrifugal blower on the opposite side to FIG. The illustration of the composition of 1 is omitted.

First, the basic structure of the centrifugal blower 1 will be described using FIGS. 1 to 3 . The centrifugal blower 1 is, for example, a multi-bladed centrifugal blower 1 such as a Siloco fan or a turbo fan. The centrifugal blower 1 is provided with a fan 2 for generating airflow, and a volute casing 4 for accommodating the fan 2 .

(fan 2)

The fan 2 is rotationally driven by a motor or the like (not shown), and uses the centrifugal force generated by the rotation to forcibly blow out air radially outward. As shown in Figure 1 and Figure 2, the fan 2 series has a disc A main plate 2a of the shape, and a plurality of blades 2d provided on the peripheral portion 2a1 of the main plate 2a. In addition, as long as the main plate 2a is a plate shape, it may be a shape other than a disk shape, such as a polygon, for example. At the central portion of the main board 2a, a shaft portion 2b for connecting a motor (not shown) is provided. The main board 2a is rotationally driven by a motor via a shaft portion 2b.

The plurality of blades 2d are arranged on a circumference centered on the shaft portion 2b, and their base ends are fixed to the main plate 2a. A plurality of blades 2d are arranged on both sides of the main board 2a in the axial direction of the rotating shaft RS of the fan 2 . The respective blades 2d are attached to the peripheral portion 2a1 of the main plate 2a, and are arranged at regular intervals therebetween. Each vane 2d is formed, for example, in a curved rectangular plate shape, and is provided along the radial direction or inclined at a predetermined angle with respect to the radial direction.

Each vane 2d is formed as a two-dimensional vane whose cross-sectional shape continues in the axial direction of the rotary shaft RS, but may also be a three-dimensional vane having a twisted shape. Moreover, each blade 2d is provided so as to stand almost vertically with respect to the main board 2a, but it is not limited to this structure, and each blade 2d may be provided so that it may incline with respect to the vertical direction of the main board 2a.

The fan 2 is arranged in the axial direction of the rotating shaft RS, and has an annular side plate (not shown) at the end of a plurality of blades 2d. The end portion of the blade 2d where the side plate is installed is tied to the blade 2d, and the end portion on the opposite side to the side connected to the main board 2a. The side plate maintains the positional relationship of the head end of each blade 2d by connecting the plurality of blades 2d, and reinforces the plurality of blades 2d.

The fan 2 is, as shown in FIG. 1 , formed in a cylindrical shape by a plurality of blades 2d arranged on a main plate 2a. And the fan 2 is in the axial direction of the rotating shaft RS, at the end of the blade 2d on the opposite side to the main board 2a, a suction port 2e is formed, and the suction port 2e allows gas to flow into the space surrounded by the main board 2a and a plurality of blades 2d. . The fan 2 is equipped with blades 2d on both sides of the board surface constituting the main board 2a, and forms suction ports 2e on both sides of the board surface constituting the main board 2a.

The fan 2 is driven by a motor (not shown in the figure), and is rotationally driven around the rotating shaft RS. By the rotation of the fan 2, the air outside the centrifugal blower 1 flows along the bell mouth 3 and passes through After the suction port 5 formed by the volute housing 4 and the suction port 2e of the fan 2, it is sucked into the space surrounded by the main board 2a and a plurality of blades 2d. Then, as the fan 2 rotates, the air sucked into the space surrounded by the main board 2a and the plurality of blades 2d passes between the blade 2d and the adjacent blade 2d, and is sent radially outward.

(volute housing 4)

The volute housing 4 is as shown in FIG. 1 and accommodates the fan 2 inside. The volute casing 4 rectifies the air blown from the fan 2 . The scroll case 4 is made of resin, but the scroll case 4 is not limited to being made of resin. The scroll housing 4 has a scroll portion 41 and a discharge portion 42 .

(volute 41)

The scroll portion 41 forms an air passage for converting the dynamic pressure of the airflow generated by the fan 2 into a static pressure. The scroll portion 41 has: a side wall 4a, which covers the side wall 4a of the fan 2 from the axial direction of the shaft RS of the shaft portion 2b of the fan 2, and forms the suction port 5 for taking in air; It radially surrounds the fan 2 .

Also, the volute portion 41 has a tongue portion 43, which is located between the discharge portion 42 and the volute initial portion 41a of the peripheral wall 4c and constitutes a curved surface, so as to blow out the air flown in from the suction port 5 toward the centrifugal direction. air and pressurize it to the required throttle. In addition, the radial direction of the rotating shaft RS is a direction perpendicular to the rotating shaft RS. The inner space of the scroll portion 41 constituted by the peripheral wall 4c and the side wall 4a is a space where the air blown from the fan 2 flows along the peripheral wall 4c.

(side wall 4a)

The side walls 4 a are arranged on both sides of the fan 2 in the axial direction of the rotating shaft RS of the fan 2 . As shown in FIGS. 1 and 3 , a suction port 5 for taking in air is formed on a side wall 4 a of the scroll casing 4 so that air can flow between the fan 2 and the outside of the scroll casing 4 .

The suction port 5 is formed in a circular shape, and the fan 2 is arranged such that the center of the suction port 5 almost coincides with the center of the shaft portion 2 b of the fan 2 . In addition, the shape of the suction port 5 is not limited to a circle, but may be other shapes such as an ellipse.

The volute casing 4 of the centrifugal blower 1 is a double-suction type casing, which is in the axial direction of the rotating shaft RS of the fan 2, and has side walls 4a forming the suction inlet 5 on both sides of the main board 2a. The centrifugal blower 1 has a scroll case 4 having two side walls 4a, and the two side walls 4a are disposed so as to face each other.

As shown in FIG. 1, the scroll housing 4 has a first side wall 4a1 and a second side wall 4a2 as side walls 4a. The first side wall 4a1 is formed along the first end portion 4c11, which is one end portion of the peripheral wall 4c in the axial direction of the rotary shaft RS, and the second side wall 4a2 is formed along the second end portion 4c12. The second end portion 4c12 is the other end portion of the peripheral wall 4c in the axial direction of the rotary shaft RS. In the first side wall 4a1, the suction port 5 facing one of the main plate surfaces of the main plate 2a is formed. The suction port 5 facing the other plate surface of the main plate 2a is formed in the second side wall 4a2.

The air inlet 5 provided on the side wall 4a is formed by the bell mouth 3 as shown in FIGS. 1 and 3 . The bell mouth 3 rectifies the gas sucked by the fan 2 and makes it flow into the suction port 2e of the fan 2 . The bell mouth 3 is formed such that the opening diameter gradually decreases from the outside to the inside of the scroll housing 4 . With the side wall 4a having this structure, the air near the suction port 5 flows smoothly along the bell opening 3, and flows into the fan 2 from the suction port 5 efficiently.

(surrounding wall 4c)

The peripheral wall 4c is a wall provided between the opposing side walls 4a, and forms a curved surface in the direction of rotation R of the fan 2 . The peripheral wall 4c guides the airflow generated by the fan 2 along the curved wall surface to the discharge port 42a through the scroll portion 41 . The peripheral wall 4c is, for example, disposed parallel to the axial direction of the rotation shaft RS of the fan 2 and covers the fan 2 . In addition, the peripheral wall 4c may be inclined with respect to the axial direction of the rotating shaft RS of the fan 2, and is not limited to the form arranged parallel to the axial direction of the rotating shaft RS. The peripheral wall 4c covers the fan 2 in the radial direction relative to the rotating shaft RS, and constitutes an inner peripheral surface opposite to the plurality of blades 2d. The peripheral wall 4c is opposed to the air blowing side of the blade 2d of the fan 2 .

The peripheral wall 4c is as shown in Fig. 2 and Fig. 3, and is arranged so as to follow the turning R of the fan 2 from the volute initial part 41a at the boundary with the tongue 43 to the volute final part 41b, and the volute final part 41b located away from the tongue The boundary between the discharge portion 42 on the side of 43 and the scroll portion 41. The volute starting part 41a is the end part on the upstream side of the airflow generated by the rotation of the fan 2 on the peripheral wall 4c constituting the curved surface, and the volute end part 41b is downstream of the airflow generated by the rotation of the fan 2 side end.

The peripheral wall 4c is formed into a scroll shape at the turn R. The spiral shape is, for example, a logarithmic spiral, an Archimedes spiral, or a spiral with an involute curve. The inner peripheral surface of the peripheral wall 4c is a curved surface smoothly curved along the circumferential direction of the fan 2 from the scroll start portion 41a which is the start point of the scroll to the scroll end portion 41b which is the scroll end point. With this configuration, the air sent from the fan 2 flows smoothly in the inner space between the fan 2 and the peripheral wall 4c toward the discharge portion 42 . Therefore, in the scroll housing 4 , the static pressure of the air is efficiently raised from the tongue portion 43 to the discharge portion 42 .

(discharge unit 42)

The discharge portion 42 forms a discharge port 42 a that discharges the airflow generated by the fan 2 and that has passed through the scroll portion 41 . The discharge portion 42 is constituted by a hollow pipe whose cross-section perpendicular to the flow direction of the air flowing along the peripheral wall 4c has a rectangular shape. In addition, the cross-sectional shape of the discharge portion 42 is not limited to a rectangle. The discharge part 42 forms a flow path that guides the air sent from the fan 2 to flow through the gap between the peripheral wall 4 c and the fan 2 so as to be discharged to the outside of the scroll housing 4 .

As shown in FIG. 1, the discharge part 42 has the extension plate 42b, the diffuser plate 42c, the 1st side wall 4a1, and the 2nd side wall 4a2. The extension plate 42b is formed so as to extend from the spiral end portion 41b of the peripheral wall 4c, and is a plate-shaped portion integrally formed with the peripheral wall 4c. The diffuser plate 42c is formed integrally with the tongue portion 43 of the scroll housing 4, and is a plate-shaped portion disposed so as to face the extension plate 42b. The diffuser plate 42c is formed to have a predetermined angle with the extension plate 42b so that the cross-sectional area of the flow path gradually expands along the flow direction of the air in the discharge portion 42 .

The extension plate 42b and the diffuser plate 42c are formed between the 1st side wall 4a1 and the 2nd side wall 4a2. In this manner, the discharge portion 42 is formed into a flow path having a rectangular cross section by the extension plate 42b, the diffuser plate 42c, the first side wall 4a1, and the second side wall 4a2.

(tongue 43)

In the scroll housing 4, a tongue portion 43 is formed between the diffuser plate 42c of the discharge portion 42 and the scroll start portion 41a of the peripheral wall 4c. The tongue portion 43 is formed with a predetermined radius of curvature, and the peripheral wall 4c is smoothly connected to the diffuser plate 42c via the tongue portion 43 .

The tongue portion 43 suppresses the inflow of air from the scroll end point to the scroll start point of the scroll flow path formed in the scroll case 4 . The tongue 43 is arranged at the upstream part of the ventilation path, and has the function of diverting the flow of the air directed toward the R direction of the fan 2 and the flow of the air from the downstream part of the ventilation path toward the discharge port 42a. In addition, the static pressure of the flow of air flowing in and out of the discharge portion 42 rises when passing through the scroll casing 4 , and becomes higher than that inside the scroll casing 4 . Therefore, the tongue 43 has the function of isolating the pressure difference.

(detailed structure of the volute housing 4)

As shown in FIGS. 1 and 3 , the scroll housing 4 has a first case portion 45 , a second case portion 46 , and a fixed portion 20 . The scroll housing 4 can be divided into a first case portion 45 and a second case portion 46 . That is, the scroll housing 4 is formed by combining the first case portion 45 and the second case portion 46 .

The first tank part 45 has a part of the scroll part 41 and the discharge part 42 forming the discharge port 42a. The first box portion 45 has a part of the peripheral wall 4c and a part of the side wall 4a. Also, the first box portion 45 has a part of the bell mouth 3 .

The second case portion 46 is constituted by a part of the scroll portion 41 . The second box portion 46 has a part of the peripheral wall 4c and a part of the side wall 4a. In addition, the second tank portion 46 has a part of the bell mouth 3 . The second case part 46 is detachably fixed to the first case part 45 . When the second case part 46 is removed from the first case part 45, the fan 2 is exposed.

By combining the first case portion 45 and the second case portion 46 , the circular bell mouth 3 is formed when viewed parallel to the axial direction of the rotary shaft RS. That is, when viewed parallel to the axial direction of the rotary shaft RS, the suction port 5 of the scroll housing 4 is formed by combining the first case portion 45 and the second case portion 46 .

The volute housing 4 is provided with a partition 60 for the purpose of housing the fan 2 in order to facilitate assembly. yes The division part 60 of the junction part of the 1st case part 45 and the 2nd case part 46 is tied to the scroll casing 4, and is formed in the side wall 4a and the peripheral wall 4c. Moreover, the division part 60 is formed in the part other than the discharge part 42. As shown in FIG. In more detail, the division part 60 is formed in the flow direction of the air flowing in the discharge part 42, and is formed in the area between the scroll start part 41a and the discharge port 42a, which is the part of the scroll start point of the scroll housing 4. Parts other than SA.

As an example, the area SA is an area between the edge portion 42d and the boundary portion 42e when viewed in a direction parallel to the axial direction of the rotation shaft RS of the fan 2 as shown in FIG. 3 . The edge part 42d is the edge part of the side wall 4a which forms the discharge port 42a. When viewed in a direction parallel to the axial direction of the rotation shaft RS of the fan 2, the boundary portion 42e is a virtual straight line portion including the scroll start portion 41a, and is a virtual straight line portion parallel to the edge portion 42d. In addition, the boundary part 42e is parallel to the edge part 42d, and this includes the structure in which the boundary part 42e and the edge part 42d are completely parallel, and the structure in which the boundary part 42e and the edge part 42d are substantially parallel.

The division part 60 is in the flow direction of the air flowing inside the peripheral wall 4c shown by the air flow AR in Fig. 2, and as shown in Fig. 2 and Fig. and the second division portion 62 formed on the downstream side of the airflow. The scroll casing 4 is divided into two divided parts 60 of the first divided part 61 and the second divided part 62 , and the first case part 45 and the second case part 46 are joined. In other words, the scroll casing 4 is divided into two constituent elements of the first case part 45 and the second case part 46 at the two division parts 60 of the first division part 61 and the second division part 62 .

The scroll housing 4 is provided with the fixed portion 20 at the divided portion 60 . The fixing portion 20 is used to fix the first box portion 45 and the second box portion 46 to each other. The fixing portion 20 is provided on the side wall 4 a of the scroll housing 4 .

As shown in FIG. 3 , the fixing part 20 has a first fixing part 20A and a second fixing part 20B. The first fixing part 20A is provided on the first division part 61 , and the second fixing part 20B is provided on the second division part 62 . That is, the first fixed portion 20A is arranged on the upstream side of the air flow to the second fixed portion 20B in the flow direction of the air flowing inside the peripheral wall 4c shown by the air flow AR in FIG. 2 , and the second fixed portion 20B The pair of first fixing parts 20A is provided on the downstream side of the air flow. Among them, the first fixing portion 20A is provided in the region of the bell mouth 3 .

The fixing part 20 is, for example, fitted by the first engaging part 21 and the second engaging part 22 In combination, the first engaging portion 21 is provided on the first case portion 45 , and the second engaging portion 22 is provided on the second case portion 46 . Alternatively, the fixing portion 20 may be formed by screwing the first engaging portion 21 provided on the first case portion 45 and the second engaging portion 22 provided on the second case portion 46 to each other. In addition, the configuration of the fixing unit 20 is not limited to these configurations.

[Air conditioner 40]

Fig. 4 is a perspective view schematically showing an example of the air conditioner 40 according to the first embodiment. Fig. 5 is a schematic diagram showing an example of the internal structure of the air conditioner 40 according to the first embodiment. Fig. 6 is a side view schematically showing an example of the internal structure of the air conditioner 40 according to the first embodiment. In addition, in FIG. 5, in order to show the internal structure of the air conditioner 40, the upper part structure, such as the upper part 16a, is abbreviate|omitted. The air conditioner 40 provided with the centrifugal blower 1 is demonstrated using FIGS. 4-6.

The air conditioner 40 is a device for air-conditioning the air-conditioning target space, and is a device that adjusts the temperature and humidity of the air taken in and discharges it to the air-conditioning target space. The air conditioner 40 is a ceiling-suspended device suspended from the ceiling, but the air-conditioner 40 is not limited to a ceiling-suspended device.

The air conditioner 40 includes: a centrifugal blower 1; a driving source 6 that imparts a driving force to the fan 2 of the centrifugal blower 1; The position where the discharge port 42a of the formed air faces. Moreover, the air conditioner 40 has the frame 16 which accommodates the centrifugal blower 1, the drive source 6, and the heat exchanger 10 inside, and is installed in the ceiling of the space to be air-conditioned. Furthermore, the air conditioner 40 may have the heat insulating material 13 in the heat exchange chamber 26 mentioned later.

(frame 16)

The frame body 16 is formed in a box shape as shown in FIG. 4 , and is formed in a rectangular parallelepiped shape including an upper surface 16a, a lower surface 16b, and a side surface 16c. In addition, the shape of the frame body 16 is not limited to a rectangular parallelepiped shape, for example, it can also be a cylinder, a prism, a cone, a shape with a plurality of corners, Other shapes such as shapes with plural curved surfaces.

The frame body 16 is one of the side portions 16c and has an inlet wall portion 16c1 forming the frame body suction port 18 . At the frame suction port 18, a filter for removing dust in the air may also be configured. Moreover, the frame body 16 has an outlet wall portion 16c2 forming the frame body air outlet 17 as one of the side portions 16c.

In the housing 16 , the inlet wall portion 16c1 and the outlet wall portion 16c2 constitute side wall surfaces that are located on opposite sides via the heat exchanger 10 and the centrifugal blower 1 . In addition, the frame suction port 18 may be formed at a position perpendicular to the axial direction of the rotation shaft RS of the centrifugal blower 1, for example, the frame suction port 18 may be formed in the lower surface portion 16b.

The frame body suction port 18 of the frame body 16 passes the air which flows into the blower chamber 25 which will be described later. The arrow IR shown in FIG. 6 represents the air sucked by the frame suction port 18 . The frame air outlet 17 of the frame 16 passes the air flowing out from the heat exchange chamber 26 described later. The arrow OR shown in FIG. 6 represents the air blown out from the frame outlet 17 .

The shapes of the frame air outlet 17 and the frame air inlet 18 are rectangular as shown in FIGS. 4 and 5 . In addition, the shape of the frame air outlet 17 and the frame air inlet 18 is not limited to a rectangle, for example, a circle, an ellipse, etc., or other shapes may be used.

The inner space of the frame body 16 is separated from the air supply chamber 25 and the heat exchange chamber 26 by the partition plate 19, the air supply chamber 25 is the space on the suction side of the volute casing 4, and the heat exchange chamber 26 is the blowing side of the volute casing 4 Space. That is, the partition plate 19 partitions the internal space of the frame body 16 into an air supply chamber 25 in which the fan 2 is disposed, and a heat exchange chamber 26 in which the heat exchanger 10 is disposed. As shown in FIG. 5 , the drive source 6 , two centrifugal blowers 1 , and the heat exchanger 10 are accommodated inside the housing 16 .

(drive source 6)

The drive source 6 is, for example, a motor. The driving source 6 is supported by the motor bracket 9 a, and the motor bracket 9 a is fixed on the upper surface 16 a of the frame body 16 . The drive source 6 has an output shaft 6a. The output shaft 6a is arranged to extend parallel to the inlet wall portion 16c1 and the outlet wall portion 16c2, and the inlet wall portion 16c1 is shaped like The frame inlet 18 is formed, and the outlet wall portion 16c2 forms the frame outlet 17 .

(centrifugal blower 1)

The centrifugal blower 1 includes a fan 2 and a volute housing 4 forming a bell mouth 3 . The centrifugal blower 1 is as shown in FIG. 5 and FIG. 6 , and the discharge portion 42 of the scroll housing 4 is fixed to the partition 19 .

The air conditioner 40 is as shown in FIG. 5, and the respective fans 2 of the two centrifugal blowers 1 are attached to the output shaft 6a. The centrifugal blower 1 having the fan 2 forms the flow of air, and the air is sucked into the frame 16 from the frame inlet 18 and blown out from the frame outlet 17 to the space to be air-conditioned. In addition, the centrifugal blower 1 series arrange|positioned in the housing|casing 16 is not limited to 2 units, but may be 1 unit or 3 or more units.

As shown in FIG. 6 , the second case portion 46 of the scroll housing 4 has a peripheral wall 4c facing the frame inlet 18 . No other components are provided between the peripheral wall 4 c facing the frame suction port 18 and the frame suction port 18 , and the peripheral wall 4 c directly faces the frame suction port 18 .

Here, as shown in FIG. 6 , when viewed from the axial direction of the rotating shaft RS of the fan 2, a virtual line connecting each of the ends 18 a and 18 b of the frame suction port 18 and the rotating shaft RS is viewed. The straight line is defined as the first imaginary line CL. In addition, the end portion 18a is the upper end portion of the frame suction port 18 and the end portion 18b is the lower end portion of the frame body suction port 18 when viewed from the axial direction of the rotary shaft RS.

Furthermore, as shown in FIG. 6 , when viewed from the axial direction of the rotation shaft RS of the fan 2 , a substantially triangular area surrounded by the first imaginary line CL and the housing suction port 18 is defined as an area SB. The fixed portion 20 of the centrifugal blower 1 is, as shown in FIG. 6 , viewed from the axial direction of the rotating shaft RS of the fan 2, and is arranged outside the area SB surrounded by the first imaginary line CL and the frame suction port 18. part.

The first fixing part 20A is provided on the opposite side to the second fixing part 20B via the rotation shaft RS. The second fixing part 20B is provided on the opposite side to the first fixing part 20A via the rotation shaft RS. In addition, the positional relationship between the first fixing part 20A and the second fixing part 20B is not limited to this relationship.

Similarly, the first division part 61 is disposed opposite to the second division part 62 via the rotation shaft RS. reverse side. The second division part 62 is provided on the opposite side to the first division part 61 via the rotation axis RS. In addition, the positional relationship of the 1st division part 61 and the 2nd division part 62 is not limited to this relationship.

(heat exchanger 10)

The heat exchanger 10 is arranged at a position facing the discharge port 42a of the centrifugal blower 1 as described above, and is arranged in the air path of the air discharged from the centrifugal blower 1 inside the frame 16 . The heat exchanger 10 adjusts the temperature of the air which is sucked into the frame 16 from the frame inlet 18 and blown out from the frame outlet 17 to the space to be air-conditioned. In addition, the heat exchanger 10 can apply a well-known structure.

The air conditioner 40 is from the frame intake 18 of the air conditioner 40 to the frame outlet 17, in the order of the frame intake 18, the scroll casing 4 of the centrifugal blower 1, the heat exchanger 10, and the frame outlet 17 configured. In the case of the ceiling-suspended air conditioner 40, these components are arranged along the horizontal direction.

Fig. 7 is a side view schematically showing the internal structure of a modified example of the air conditioner 40 of the first embodiment. As described above, the area SA is viewed in a direction parallel to the axial direction of the rotation shaft RS of the fan 2 as an example, and is an area between the edge portion 42d and the boundary portion 42e as shown in FIG. 3 . However, the area SA is not limited to this area. For example, as shown in FIG. 7, a virtual line vertically connected between the upper portion 16a and the lower portion 16b through the scroll start portion 41a of the scroll housing 4 is defined as a virtual line FL, and the upper portion 16 a constitutes the upper surface of the frame body 16 , and the lower surface portion 16 b constitutes the lower surface of the frame body 16 . In this case, the area SA can also be regarded as the area of the scroll housing 4 formed between the imaginary line FL and the discharge port 42a.

[Operation Example of Air Conditioner 40]

Driven by the drive source 6 , when the fan 2 rotates, the air in the air-conditioned space is sucked into the frame body 16 through the frame body suction port 18 . The air sucked inside the frame body 16 flows along the bell mouth 3 and is drawn into the inside of the fan 2 . The air sucked by the fan 2 is blown out towards the radially outside of the fan 2 .

The air blown from the fan 2 is boosted while passing through the inside of the scroll housing 4 . The boosted air is blown out from the discharge port 42 a of the scroll casing 4 and supplied to the heat exchanger 10 . When the air supplied to the heat exchanger 10 passes through the heat exchanger 10 , it exchanges heat with a heat exchange medium such as a refrigerant flowing inside the heat exchanger 10 to adjust its temperature and humidity. The air that has passed through the heat exchanger 10 is blown out from the frame outlet 17 into the space to be air-conditioned.

[Action and effect of the air conditioner 40]

The centrifugal blower 1 has the fixing part 20 which fixes the 1st case part 45 and the 2nd case part 46 mutually. The fixing portion 20 is disposed on the side wall 4a. Moreover, the fixed portion 20 is provided in a portion other than the area SB surrounded by the first imaginary line CL and the housing suction port 18 when viewed from the axial direction of the rotation shaft RS of the fan 2. The first imaginary line CL It is a virtual straight line connecting each of the two ends of the frame suction port 18 and the rotating shaft RS. In the air conditioner 40 , since the fixed portion 20 is located away from the frame suction port 18 of the air conditioner 40 , the fast air flow flowing in from the frame suction port 18 can be suppressed from interfering with the fixed portion 20 . Therefore, the air conditioner 40 suppresses the detachment of the air flow flowing in the bell mouth 3, thereby suppressing the reduction of the air volume of the gas flowing into the scroll housing 4.

FIG. 8 is a schematic diagram of a centrifugal blower 1L of a comparative example viewed from the axial direction of the rotating shaft RS. FIG. 9 is a schematic diagram of a segmented centrifugal blower 1L of a comparative example. FIG. 10 is a schematic diagram showing an example of an internal configuration of an air conditioner 40L of a comparative example. Using FIGS. 8 to 10 , a description will be given of a centrifugal blower 1L and an air conditioner 40L of a comparative example.

As shown in FIG. 10 , an air conditioner 40L of a comparative example has a centrifugal blower 1L. The scroll housing 4L of the centrifugal blower 1L is divided into two components, a lower case 47L and an upper case 48L, as shown in FIGS. 8 and 9 to house the fan 2 . The scroll case 4L divided into two elements of the lower case portion 47L and the upper case portion 48L has a divided portion 60L where the two elements are joined at the discharge portion 42L constituting the discharge port 42a of the scroll case 4L. Furthermore, the scroll housing 4L further has another division part 60L on the opposite side to the division part 60 of the discharge part 42L across the suction port 5 of the scroll housing 4L.

In the centrifugal blower 1L of the comparative example, in order to fix the two elements of the divided lower case part 47L and the upper side case part 48L to each other, a fixing part 20L is provided near each divided part 60L and on the side wall surface of the scroll casing 4L. .

Generally, when the air flowing in from the suction port of the air conditioner flows into the inside of the fan along the bell-shaped mouth of the volute casing, the airflow system has a velocity distribution in the circumferential direction of the rotating shaft of the fan, and the wind speed becomes larger at the suction port side of the air conditioner. . Therefore, as shown in the area enclosed by the dotted line BD in FIG. 10 , in the air conditioner 40L of the comparative example, the fixing portion 20L provided on the air inlet 18 side of the air conditioner 40L may interfere with the airflow AR. The air conditioner 40L is because the fixing part 20L provided on the side of the frame suction port 18 interferes with the airflow AR, the airflow flowing in the bell mouth is separated, and the air volume of the gas flowing into the scroll casing 4L is reduced.

In contrast, the air conditioner 40 of Embodiment 1 is because the position of the fixing part 20 is far away from the frame suction port 18 of the air conditioner 40 by the above-mentioned structure, so the fast airflow flowing in from the frame body suction port 18 can be suppressed and the fast air flow can be fixed. Section 20 Interference. Therefore, the air conditioner 40 suppresses the detachment of the air flow flowing in the bell mouth 3, thereby suppressing the reduction of the air volume of the gas flowing into the scroll housing 4.

Also, in the air conditioner 40L of the comparative example, noise is generated due to the interference between the fixing portion 20 provided on the casing suction port 18 side and the air flow AR, and the noise generated from the air conditioner 40L may increase.

In contrast, the air conditioner 40 of Embodiment 1 is because the position of the fixing part 20 is far away from the frame suction port 18 of the air conditioner 40 by the above-mentioned structure, so the fast airflow flowing in from the frame body suction port 18 can be suppressed and the fast air flow can be fixed. Section 20 Interference. Therefore, the air conditioner 40 can suppress the generation of the noise caused by the interference between the fast air flow flowing in from the frame suction port 18 and the fixing part 20, and the noise generated from the air conditioner 40 can be lower than that of the air conditioner of the comparative example. The device 40L is lowered.

Also, in general, the air flow flowing in the scroll casing is boosted toward the discharge port of the scroll casing. The air conditioner 40L of the comparative example is because the discharge port 42a is formed in the scroll housing 4L. Since the outlet portion 42L is provided with a divided portion 60L, the air boosted to a high pressure easily leaks from the divided portion 60L of the discharge portion 42L.

On the other hand, in the air conditioner 40 of Embodiment 1, the division part 60 is formed in the part other than the discharge part 42. As shown in FIG. In the air conditioner 40 of Embodiment 1, since the partition 60 is not formed in the discharge part 42 through which the high-pressure air passes, leakage of air in the partition 60 can be suppressed compared with the air conditioner 40L of the comparative example.

Also, in the air conditioner 40 of Embodiment 1, in the flow direction of the air flowing in the discharge part 42, the partition part 60 is formed in a part other than the area SA between the scroll start part 41a and the discharge port 42a, and the scroll starts The start portion 41a is a portion that becomes the start of the scroll of the scroll housing 4 . That is, the division part 60 of the air conditioner 40 of Embodiment 1 is not formed in the discharge part 42 . In the air conditioner 40 of Embodiment 1, since the partition 60 is not formed in the discharge part 42 through which the high-pressure air passes, leakage of air in the partition 60 can be suppressed compared with the air conditioner 40L of the comparative example.

In addition, the air conditioner 40 constitutes side wall surfaces of the inlet wall portion 16c1 and the outlet wall portion 16c2 on opposite sides of each other through the heat exchanger 10 and the centrifugal blower 1, the inlet wall portion 16c1 forms the frame suction port 18, and the outlet wall portion 16c1 forms the frame suction port 18, and the outlet wall portion The wall portion 16c2 forms the frame outlet 17 . Therefore, the air conditioner 40 can arrange the inlet wall portion 16c1, the centrifugal fan 1, the heat exchanger 10, and the outlet wall portion 16c2 along the horizontal direction, and can construct the air conditioner from the frame body suction port 18 to the frame body with a simple structure. Blow out the wind path of outlet 17. In addition, the air conditioner 40 can arrange these constituent elements in a direction along the horizontal direction, and can be used, for example, in a ceiling-suspended air conditioner.

Implementation form 2 [air conditioner 40A]

Fig. 11 is a side view schematically showing an example of the internal structure of an air conditioner 40A according to the second embodiment. The parts having the same configuration as those of the air conditioner 40 in FIGS. 1 to 10 are given the same reference numerals, and description thereof will be omitted. The air conditioner 40A of Embodiment 2 is more specific to accommodate the centrifugal blower The positions of the dividing part 60 and the fixing part 20 of 1A. Therefore, in the following description, using FIG. 11, the structure about the position of the division|segmentation part 60 and the fixed part 20 of 1 A of centrifugal blowers is mainly demonstrated. In addition, the configurations of the air conditioner 40A and the centrifugal blower 1A of the second embodiment are the same as the configurations of the air conditioner 40 and the centrifugal blower 1 of the first embodiment unless otherwise specified.

The division part 60 of the centrifugal blower 1A has a first division part 61 formed on the upstream side and a second division part 62 formed on the downstream side in the flow direction of the air flowing inside the peripheral wall 4c. Furthermore, the air conditioner 40A is between the housing inlet 18 and the housing air outlet 17, and one of the first division part 61 and the second division part 62 is formed closer to the housing outlet 17 than the other. That is, the first divided portion 61 and the second divided portion 62 of the centrifugal blower 1A are not positioned on a straight line as in the first embodiment, but are formed at positions shifted from each other in the left-right direction.

The fixing part 20 is provided in the division|segmentation part 60 of 40 A of air conditioners. Therefore, the air conditioner 40A is between the housing suction port 18 and the housing air outlet 17, and one of the first fixing portion 20A and the second fixing portion 20B is formed closer to the housing air outlet 17 than the other. That is, 1st fixing part 20A and 2nd fixing part 20B of 1 A of centrifugal blowers are formed in the position which mutually shifted in the left-right direction.

Here, from the viewpoint of the axial direction of the rotation shaft RS of the fan 2, the part located in the inner edge of the suction port 5 in the first division part 61 is defined as the first inner edge part 5a, and the part in the second division part 61 is defined as the first inner edge part 5a. The part 62 located in the inner edge part of the suction port 5 is defined as the 2nd inner edge part 5b. Alternatively, the scroll housing 4 may be viewed from the axial direction of the rotating shaft RS of the fan 2, and the second imaginary line TL may be formed at a position closer to the frame outlet 17 than the rotating shaft RS, and the second imaginary line TL may be A virtual straight line connecting the first inner edge portion 5a and the second inner edge portion 5b.

[Function and effect of air conditioner 40A]

The air conditioner 40A exhibits the same effect as the air conditioner 40 because the position where the dividing portion 60 is formed and the position where the fixing portion 20 is provided are the same as those of the air conditioner 40 of Embodiment 1.

The air conditioner 40A is between the housing inlet 18 and the housing air outlet 17 , and one of the first division part 61 and the second division part 62 is formed closer to the housing outlet 17 than the other. exist When the air conditioner 40A has this configuration, one of the first fixing portion 20A and the second fixing portion 20B is formed at a place away from the housing suction port 18 .

Therefore, the speed of the airflow which interferes with the fixed part 20 formed in the place far from the housing|casing suction port 18 in 40 A of air conditioners becomes low speed. Since the velocity of the airflow interfering with the fixed part 20 becomes low, the detachment of the airflow flowing in the bell mouth 3 is suppressed, so the air conditioner 40A can suppress the reduction of the air volume of the gas flowing into the scroll housing 4 . In addition, since the speed of the airflow interfering with the fixed part 20 becomes low, the air conditioner 40A can suppress the generation of noise due to the interference of the airflow with the fixed part 20, and can reduce the noise from the air conditioner compared with the air conditioner 40L. Noise generated by device 40A.

In addition, 1 A of centrifugal blowers consider the balance of the surface area of the 1st tank part 45 and the 2nd tank part 46. When the air conditioner 40A has this structure, the distance between the fixing part 20 and the housing suction port 18 can be secured while balancing the surface areas of the first tank part 45 and the second tank part 46 .

In addition, the second imaginary line TL of the scroll casing 4 may be formed at a position closer to the frame outlet 17 than the rotation axis RS. In the case where the air conditioner 40A has this configuration, both the first fixing portion 20A and the second fixing portion 20B are fixed by the rotation shaft RS compared to the configuration in which the first fixing portion 20A and the second fixing portion 20B are formed on opposite sides of each other. It is formed at a place away from the suction port 18 of the frame body.

Therefore, the speed of the airflow which 40 A of air conditioners interfere with the fixed part 20 becomes low speed. Since the velocity of the airflow interfering with the fixed part 20 becomes low, the detachment of the airflow flowing in the bell mouth 3 is suppressed, so the air conditioner 40A can suppress the reduction of the air volume of the gas flowing into the scroll housing 4 . In addition, since the speed of the airflow interfering with the fixed part 20 becomes low, the air conditioner 40A can suppress the generation of noise due to the interference of the airflow with the fixed part 20, and can reduce the noise from the air conditioner compared with the air conditioner 40L. Noise generated by device 40A.

Implementation form 3 [Air conditioner 40B]

FIG. 12 schematically shows an example of the internal structure of an air conditioner 40B according to Embodiment 3. side view. The parts having the same configuration as those of the air conditioner 40 and the like in FIGS. 1 to 11 are given the same reference numerals, and description thereof will be omitted. The air conditioner 40B of Embodiment 3 further specifies the structure of the division part 60 of the accommodated centrifugal blower 1B. Therefore, in the following description, using FIG. 12, the structure of the division|segmentation part 60 of the centrifugal blower 1B is mainly demonstrated. In addition, the configurations of the air conditioner 40B and the centrifugal blower 1B of the third embodiment are the same as those of the air conditioner 40 and the centrifugal blower 1 of the first embodiment unless otherwise specified.

The centrifugal blower 1B has a scroll casing 4B. Part of the peripheral wall 4c of the scroll housing 4B has a planar portion 65 formed in a flat plate shape. The flat portion 65 is formed in a planar shape on a part of the peripheral wall 4c formed in a spiral shape. When viewed from the axial direction of the rotation shaft RS of the fan 2, the flat portion 65 is formed in a straight line.

In the scroll housing 4B, the division part 60 is formed so that the flat part 65 may be divided. That is, the planar portion 65 is formed on the divided portion 60 . The plane portion 65 formed in the first divided portion 61 and the plane portion 65 formed in the second divided portion 62 may be formed parallel to each other when viewed from the axial direction of the rotation shaft RS of the fan 2 . However, the scroll housing 4B is not limited to the configuration in which the planar portion 65 of the first divided portion 61 and the planar portion 65 of the second divided portion 62 are formed in parallel.

[Action Effect of Air Conditioning Device 40B]

The air conditioner 40B exhibits the same effect as the air conditioner 40 because the position where the dividing portion 60 is formed and the position where the fixing portion 20 is provided are the same as those of the air conditioner 40 of Embodiment 1.

Moreover, in the air conditioner 40B, the divided part 60 is formed so that the flat part 65 may be divided. In the case of the first case part 45 made of resin and the second case part 46 made of resin, since the division part 60 has the flat part 65, the first case part 45 and the second case part 46 are easily pulled out from the mold, and the air conditioner The production work of the device 40B becomes easy.

Moreover, the plane part 65 formed in the 1st divided part 61 and the plane part 65 formed in the 2nd divided part 62 are formed parallel to the viewpoint seen from the axial direction of the rotation shaft RS of the fan 2. In the case of the first case part 45 and the second case part 46 made of resin, only the flat part 65 and the second part of the first division part 61 are formed in parallel. The planar portion 65 of the divided portion 62 makes it easier to pull out the first case portion 45 and the second case portion 46 from the mold, thereby facilitating the manufacturing operation of the air conditioner 40B.

Embodiment 4 [air conditioner 40C]

Fig. 13 is a side view schematically showing an example of the internal structure of an air conditioner 40C according to the fourth embodiment. In addition, the same code|symbol is attached|subjected to the part which has the same structure as the air-conditioning apparatus 40 etc. of FIGS. 1-12, and description is abbreviate|omitted. In the air conditioner 40C of Embodiment 4, the positions of the divided part 60 and the fixed part 20 of the accommodated centrifugal blower 1C are further specified. Therefore, in the following description, using FIG. 13, the structure about the position of the division|segmentation part 60 and the fixed part 20 of 1 C of centrifugal blowers is mainly demonstrated. In addition, the configurations of the air conditioner 40C and the centrifugal blower 1C of the fourth embodiment are the same as those of the air conditioner 40 and the centrifugal blower 1 of the first embodiment unless otherwise specified.

As shown in FIG. 13 , when viewed from the axial direction of the rotation shaft RS of the fan 2 , a substantially triangular area surrounded by the first imaginary line CL and the housing suction port 18 is defined as an area SB. The fixing part 20 of the centrifugal blower 1C is, as shown in FIG. 13 , viewed from the axial direction of the rotating shaft RS of the fan 2, and is arranged outside the area SB surrounded by the first imaginary line CL and the frame suction port 18. part.

Furthermore, as shown in FIG. 13, at the viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2, the first reference line SL1, which is a virtual straight line connecting the scroll starting portion 41a and the rotating shaft RS, is defined. SL1, the position of the center of the scroll start portion 41a and the rotating shaft RS is defined as the middle position M1. Also, a virtual straight line extending in the vertical direction including the middle position M1 is defined as a second reference line SL2. The second reference line SL2 is, for example, a line along the weight direction.

The fixing portion 20 is provided on the side wall 4 a located between the second reference line SL2 and the housing suction port 18 . Therefore, as shown in FIG. 13 , the fixing portion 20 is provided in a region SC between the region SB and the second reference line SL2 on the side wall 4 a.

[Action and effect of air conditioner 40C]

The air conditioner 40C exhibits the same effects as the air conditioner 40 because the position where the dividing portion 60 is formed and the position where the fixing portion 20 is provided are the same as those of the air conditioner 40 of Embodiment 1.

Moreover, the fixing part 20 is provided in the side wall 4a located between the 2nd reference line SL2 and the housing|casing suction port 18. As shown in FIG. In the air conditioner 40C, since the fixed portion 20 is located far away from the frame suction port 18 of the air conditioner 40C, the fast air flow flowing in from the frame suction port 18 can be suppressed from interfering with the fixed portion 20 . Therefore, the air conditioner 40C suppresses the separation of the airflow flowing in the bell mouth 3, and suppresses the reduction of the air volume of the gas flowing into the scroll housing 4.

Moreover, by providing the fixing portion 20 on the side wall 4a located between the second reference line SL2 and the housing suction port 18, the centrifugal blower 1C can balance the surface areas of the first case portion 45 and the second case portion 46.

Embodiment 5 [air conditioner 40D]

Fig. 14 is a side view schematically showing an example of the internal structure of an air conditioner 40D according to the fifth embodiment. In addition, the same code|symbol is attached|subjected to the part which has the same structure as the air-conditioning apparatus 40 etc. of FIGS. 1-13, and description is abbreviate|omitted. The air conditioner 40D of the fifth embodiment is mounted on the frame 16D, and the position where the frame suction port 18 is formed is different from that of the frame suction port 18 of the air conditioner 40 of the first embodiment. In the following description, the relationship between the housing 16D and the centrifugal blower 1 will be mainly described using FIG. 14 . In addition, the configuration of the air conditioner 40D of the fifth embodiment is the same as that of the air conditioner 40 of the first embodiment unless otherwise specified.

The frame 16D has an inlet wall portion 16b1 forming the frame suction port 18 and an outlet wall portion 16c2 forming the frame air outlet 17 . The entrance wall portion 16b1 is a wall portion constituting the lower surface of the frame body 16D. The inlet wall portion 16b1 is a part of the lower surface portion 16b. The outlet wall portion 16c2 is a wall portion constituting a side surface of the frame body 16D.

As shown in FIG. 14 , the second case portion 46 of the scroll housing 4 has a peripheral wall 4c facing the suction port 18 of the frame. No other components are provided between the peripheral wall 4 c facing the frame suction port 18 and the frame suction port 18 , and the peripheral wall 4 c directly faces the frame suction port 18 .

Here, as shown in FIG. 14 , when viewed from the axial direction of the rotating shaft RS of the fan 2, a virtual line connecting each of the ends 18d and 18e of the frame suction port 18 and the rotating shaft RS is viewed. The straight line is defined as the first imaginary line CL. When viewed from the axial direction of the rotation axis RS, the end portion 18d is an end portion on the frame air outlet 17 side, or an end portion on the front side of the frame body 16D. The end portion 18e is an end portion on the rear side of the frame body 16D. In addition, here, in the frame body 16D, the side surface forming the frame body air outlet 17 is regarded as the front side of the frame body 16D, and the side surface opposite to the frame body air outlet 17 is regarded as the front side of the frame body 16D. back side.

Furthermore, as shown in FIG. 14 , a substantially triangular area surrounded by the first imaginary line CL and the housing suction port 18 is defined as an area SB when viewed from the axial direction of the rotation shaft RS of the fan 2 . As shown in FIG. 14, the fixed part 20 of the centrifugal blower 1 is arranged outside the area SB surrounded by the first imaginary line CL and the frame suction port 18 when viewed from the axial direction of the rotating shaft RS of the fan 2. part.

[Action and effect of air conditioner 40D]

The air conditioner 40D exhibits the same effects as the air conditioner 40 because the position where the dividing portion 60 is formed and the position where the fixing portion 20 is provided are the same as those of the air conditioner 40 of Embodiment 1.

Also, the inlet wall portion 16b1 forming the frame suction port 18 is a wall portion constituting the lower surface of the frame body 16D, and the outlet wall portion 16c2 forming the frame body air outlet 17 is a wall portion constituting the side surface of the frame body 16D. Therefore, the air conditioner 40D sucks in air from below, and discharges the conditioned air to the side.

Embodiment 6 [Air conditioner 40E]

Fig. 15 is a side view schematically showing an example of the internal structure of an air conditioner 40E according to the sixth embodiment. In addition, the same code|symbol is attached|subjected to the part which has the same structure as the air-conditioning apparatus 40 etc. of FIGS. 1-14, and description is abbreviate|omitted. The air conditioner 40E of Embodiment 6 is attached to the frame 16E, and the position where the frame suction port 18 is formed is different from the position where the frame suction port 18 is formed in the air conditioner 40 of Embodiment 1. In the following description, using FIG. 15 , the relationship between the housing 16E and the centrifugal blower 1 will be mainly described. In addition, the configuration of the air conditioner 40E of Embodiment 6 is the same as that of the air conditioner of Embodiment 1 unless otherwise specified. Set 40 in the same configuration.

The frame 16E has an inlet wall portion 16b1 forming the frame suction port 18 and an outlet wall portion 16c2 forming the frame air outlet 17 . The inlet wall portion 16b1 is a wall portion constituting the lower surface of the frame body 16E. The inlet wall portion 16b1 is a part of the lower surface portion 16b. The outlet wall portion 16c2 is a wall portion constituting a side surface of the frame body 16E.

Moreover, the frame body 16E has an inlet wall portion 16c1 forming the frame body suction port 18 as one of the side portions 16c. In the housing 16E, the inlet wall part 16c1 and the outlet wall part 16c2 constitute side wall surfaces located on opposite sides via the heat exchanger 10 and the centrifugal blower 1 . The frame body 16E is two air suction ports of the frame body suction port 18 formed in the inlet wall portion 16b1 and the frame body suction port 18 formed in the inlet wall portion 16c1.

As shown in Fig. 15, the second box portion 46 of the scroll housing 4 has a peripheral wall 4c facing the two air suction ports, and the two air suction ports are framed by the inlet wall portion 16b1. The suction port 18 and the frame body suction port 18 formed in the inlet wall portion 16c1. No other components are provided between the peripheral wall 4 c facing the frame suction port 18 and the frame suction port 18 , and the peripheral wall 4 c directly faces the frame suction port 18 .

Here, as shown in FIG. 15 , when viewed from the axial direction of the rotating shaft RS of the fan 2, the shortest imaginary straight line connecting the surface of the inlet wall portion 16c1 forming the frame suction port 18 and the rotating shaft RS is defined as a horizontal straight line. EL1. The horizontal straight line EL1 is a straight line perpendicular to the surface of the inlet wall portion 16c1 on which the frame inlet 18 is formed.

Also, when viewed from the axial direction of the rotating shaft RS of the fan 2, the shortest imaginary straight line connecting the surface of the inlet wall portion 16b1 forming the frame suction port 18 and the rotating shaft RS is defined as a vertical straight line EL2. The vertical straight line EL2 is a straight line perpendicular to the surface of the inlet wall portion 16b1 on which the frame inlet 18 is formed.

In addition, when viewed from the axial direction of the rotating shaft RS of the fan 2, the area surrounded by the frame suction port 18 of the inlet wall portion 16c1, the horizontal line EL1, the frame body suction port 18 of the inlet wall portion 16b1, and the vertical line EL2 Defined as area SE.

The air conditioner 40E does not include the fixed portion 20 and the divided portion 60 in the area SE.

[Action and effect of air conditioner 40E]

The area SE is an area close to the two air suction ports of the frame suction port 18 formed on the entrance wall 16b1 and the frame suction port 18 formed on the entrance wall 16c1, and is an area where the suction volume of air is relatively large. . The air conditioner 40E does not include the fixed portion 20 and the divided portion 60 in the area SE. Since the air conditioner 40E has this structure, the fixing part 20 is not installed in the area where the suction amount of air is comparatively large.

Therefore, the air conditioner 40E can suppress the amount of airflow which interferes with the fixing part 20 . The air conditioner 40E suppresses the amount of airflow that interferes with the fixed part 20, and suppresses the separation of the airflow flowing in the bell mouth 3, so that the reduction in the airflow volume of the gas flowing into the scroll housing 4 can be suppressed. In addition, the air conditioner 40E suppresses the amount of airflow that interferes with the fixed part 20, thereby suppressing the generation of noise caused by the interference of the airflow with the fixed part 20, and reducing the noise from the air conditioner 40L compared with the air conditioner 40L. Noise produced by 40E.

In addition, the air conditioner 40E does not include the fixed portion 20 and the divided portion 60 in the area SE. In the air conditioner 40E, the velocity of the airflow that interferes with the fixed portion 20 formed at a distance from the frame suction port 18 formed on the inlet wall portion 16b1 and the frame formed on the inlet wall portion 16c1 becomes low. Two air suction ports of the suction port 18. Since the velocity of the airflow interfering with the fixed part 20 becomes low, the detachment of the airflow flowing in the bell mouth 3 is suppressed, so the air conditioner 40E can suppress the reduction of the air volume of the gas flowing into the scroll housing 4 . In addition, since the speed of the airflow interfering with the fixed part 20 becomes low, the air conditioner 40E can suppress the generation of noise due to the interference of the airflow with the fixed part 20, and can reduce the noise from the air conditioner compared with the air conditioner 40L. Noise produced by device 40E.

In addition, in the above-mentioned Embodiment 1 to Embodiment 6, the double-suction type centrifugal blower 1 having the double-suction type fan 2 is given in series. The fan 2 forms a plurality of blades 2d on both sides of the main board 11 . However, the first to sixth embodiments described above can also be applied to a single-suction centrifugal blower 1 having a single-suction fan 2 formed with a plurality of blades 2d on only one side of the main board 11.

Each of the above-mentioned embodiments 1 to 6 can be implemented in combination with each other. In addition, the configuration shown in the above embodiments is an example, and it may be combined with other well-known techniques, and a part of the configuration may be omitted or changed within the range not exceeding the gist.

1: centrifugal blower

3: bell mouth

4: Vortex housing

4c: Peripheral wall

10: Heat exchanger

13: Insulation material

16: frame

16b: lower part

16c1: entrance wall

16c2: Exit wall

17: Frame outlet

18: Frame intake

18a: end

18b: end

19: Partition

20: fixed part

20A: The first fixed part

20B: The second fixed part

25: Air supply room

26: Heat exchange chamber

40: Air conditioning unit

41a: scroll start

42: discharge part

42a: discharge port

42d: edge

42e: Boundary

43: Tongue

45: The first box part

46: The second box part

60: Division

61: The first division

62: The second division

CL: 1st virtual line

IR: Arrow

OR:arrow

RS: shaft

SA: area

SB: area

Claims (4)

An air conditioner, comprising: a centrifugal blower, which includes a fan driven to rotate; and a volute housing, which accommodates the fan, and has a volute-shaped peripheral wall and a side wall for setting an air suction port; The source is to give driving force to the fan; the heat exchanger is arranged at a position opposite to the air discharge port formed in the volute casing; and the frame is to accommodate the centrifugal blower, the drive source and the heat exchanger, and a frame with partitions separating the inside of the air supply chamber where the fan is arranged and the heat exchange chamber where the heat exchanger is arranged to form a frame intake through which the air flowing into the air supply chamber passes. mouth, and the frame outlet through which the air flowing out of the heat exchange chamber passes; the volute casing has: a first box part, a discharge part forming the discharge port, and the discharge part is fixed to the partition plate; the second box part has the peripheral wall opposite to the frame inlet, and is detachably fixed to the first box part; and the fixing part is arranged on the side wall and fixes the first box part. 1 tank part and the 2nd tank part; the dividing part which is the joint part of the 1st tank part and the 2nd tank part is formed on the side wall and the peripheral wall, and is formed on a part other than the discharge part; the The fixing part is arranged in a part outside the area surrounded by the first imaginary line and the suction port of the frame when viewed from the axial direction of the rotating shaft of the fan, and the first imaginary line is connected to the suction port of the frame. An imaginary straight line between each of the two ends of the mouth and the rotating shaft; wherein the division part is the flow direction of the air flowing inside the peripheral wall, and has: a first division part formed on the upstream side; and The second segment formed on the downstream side; between the frame inlet and the frame outlet, one of the first segment and the second segment is formed closer to the frame than the other The position of the blowing outlet; from the viewpoint of the axial direction of the rotating shaft, the part located at the inner edge of the suction port in the first divided part is regarded as the first inner edge part, and the part in the second divided part In the case where the part located at the inner edge of the suction port is regarded as the second inner edge, the second imaginary line of the imaginary straight line connecting the first inner edge and the second inner edge of the scroll casing is defined as formed at a position closer to the discharge port than the shaft. An air conditioner, comprising: a centrifugal blower, which includes a fan driven to rotate; and a volute housing, which accommodates the fan, and has a volute-shaped peripheral wall and a side wall for setting an air suction port; The source is to give driving force to the fan; the heat exchanger is arranged at a position opposite to the air discharge port formed in the volute casing; and the frame is to accommodate the centrifugal blower, the drive source and the heat exchanger, and a frame with partitions separating the inside of the air supply chamber where the fan is arranged and the heat exchange chamber where the heat exchanger is arranged to form a frame intake through which the air flowing into the air supply chamber passes. mouth, and the frame outlet through which the air flowing out of the heat exchange chamber passes; the volute casing has: a first box part, a discharge part forming the discharge port, and the discharge part is fixed to the partition plate; the second box part has the peripheral wall opposite to the frame inlet, and is detachably fixed to the first box part; and the fixing part is arranged on the side wall and fixes the first box part. 1 box part and the 2nd box part; The dividing part, which is the joint part of the first box part and the second box part, is formed on the side wall and the peripheral wall, and is formed on a part other than the discharge part; The viewpoint of the axial view is set outside the area surrounded by the first imaginary line connecting each of the two ends of the frame suction port and the rotating shaft. The imaginary straight line; the fixed part is at the point of view viewed from the axial direction of the rotating shaft, at the first point of the imaginary straight line connecting the scroll start part of the scroll starting part of the scroll housing and the rotating shaft 1. If the position of the center of the reference line is regarded as the middle position, the fixing part is provided on the side wall between the second reference line and the suction port of the frame, and the second reference line includes the position of the middle position. A virtual straight line extending up and down. The air conditioner according to claim 1 or 2, wherein the frame system has: an inlet wall forming the inlet of the frame; and an outlet wall forming the outlet of the frame; the inlet wall and the outlet wall are constituted The heat exchanger and the centrifugal blower are located on opposite side wall surfaces. The air conditioner according to claim 1 or 2, wherein the peripheral wall has a planar portion forming a part of the wall in a flat plate shape; and the volute housing forms the split portion by splitting the planar portion.

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