TW202140936A - Air conditioner - Google Patents

Abstract

This air conditioner comprises: a centrifugal blower including a fan which is rotationally driven, and a scroll casing in which the fan is stored, and which has a peripheral wall formed in a spiral shape and a side wall provided with an air suction port; a driving source for applying a driving force to the fan; a heat exchanger disposed in a position facing an air discharge port formed in the scroll casing; a housing in which the centrifugal blower, the driving source, and the heat exchanger are stored, and which has a partition plate for partitioning the inside thereof into an air blowing chamber where the fan is disposed and a heat exchange chamber where the heat exchanger is disposed, the housing having formed therein a housing suction port through which air flowing into the air blowing chamber passes, and a housing blowout port through which air flowing out from the heat exchange chamber passes, wherein the scroll casing has a first case part having a discharge part that forms the discharge port and is fixed to the partition plate, a second case part having a peripheral wall facing the housing suction port and detachably fixed to the first case part, and a fixing part which is provided on the side wall and fixes the first case part and the second case part, and a dividing part, which is a joining portion between the first case part and the second case part, is formed on the side wall and the peripheral wall and formed on portions other than the discharge part and, in a viewpoint seen in the axial direction of the axis of rotation of the fan, the fixing part is provided to portions other than a region surrounded by the housing suction port and a first virtual line, which is a virtual straight line connecting both ends of the housing suction port and the axis of rotation.

Description

Air-conditioning device

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

A conventional air conditioner has a heat exchanger and a centrifugal blower between the air suction port and the air blowout port, and the centrifugal blower has a scroll casing. The air conditioner is rotated by the fan contained in the scroll casing, and the air sucked in from the suction port of the air conditioner flows into the fan along the bell-shaped port formed in the suction port of the scroll casing. Then, the air flow discharged from the fan is pressurized in the scroll casing, is discharged from the scroll casing, passes through the heat exchanger, and is discharged from the air outlet of the air conditioner to the air-conditioned space.

The scroll casing used in the air conditioner is sometimes divided into two components in order to house a fan. The scroll casing is divided into two elements in consideration of the ease of manufacture, and the component constituting the discharge port of the scroll casing has a division part where the two elements are joined, and the suction port of the scroll casing is opposite to each other. The side further has another division part (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, a fixing portion is provided on the wall surface of the scroll casing in the vicinity of each divided portion. [Prior Patent Document] [Patent Literature]

Patent Document 1: Japanese Patent Application Publication No. 2005-69177

[The problem to be solved by the invention]

However, the speed of the airflow flowing into the suction port of the scroll casing becomes faster on the suction port side of the air conditioner. Therefore, the air conditioner of Patent Document 1 interferes with the airflow due to the fixed part provided on the suction port side of the air conditioner, and the airflow flowing through the bell-shaped mouth is peeled off, and the amount of air flowing into the scroll casing is reduced. condition.

The present disclosure is to solve the above-mentioned problems, and its purpose is to obtain an air-conditioning device that suppresses the decrease in the air volume of the gas flowing into the scroll casing of the centrifugal blower. [Means to solve the problem]

The air conditioner of the present disclosure includes: a centrifugal blower, which includes a fan that is driven to rotate; and a scroll housing, which houses the fan and has a peripheral wall formed in a scroll shape and a side wall provided with an air suction port; a driving source, It imparts driving force to the fan; the heat exchanger is arranged at a position opposite to the air outlet formed in the scroll casing; and the frame body accommodates the centrifugal blower, the driving source and the heat exchanger, In addition, the blower room with fan and the heat exchange room with heat exchanger have a frame with partitions separating the inside, forming a frame suction port through which the air flowing into the blower room passes, and the air flowing out of the heat exchange room The frame body blow-through outlet through; the scroll shell system has: the first box part has the discharge part forming the discharge port, and the discharge part is fixed to the partition plate; the second box part has the opposite to the frame suction port It is detachably fixed to the first box part; and the fixed part is arranged on the side wall and fixes the first box part and the second box part; it is the first box part and the second box part. The dividing part of the joining 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 set at the viewpoint viewed from the axial direction of the fan shaft, and is set on the first virtual line and the frame is sucked in The first virtual line is a virtual straight line connecting each of the two ends of the suction port of the frame and the axis of rotation. [Effects of the invention]

According to the present disclosure, the centrifugal blower has a fixed part that fixes the first box part and the second box part to each other. The fixing part is provided on the side wall, and is provided at a point of view from the axial direction of the rotating shaft of the fan outside the area enclosed by the first virtual line and the frame suction port, and the first virtual line is A virtual straight line connecting each of the two ends of the suction port of the frame and the rotating shaft. The air-conditioning device is located far away from the air-conditioning unit's frame suction port, so the interference of the fast airflow flowing in from the frame's suction port and the fixed portion can be suppressed. Therefore, the air conditioner suppresses the separation of the air flow flowing through the bell-shaped mouth, and can suppress the decrease in the air volume of the gas flowing into the scroll casing.

Hereinafter, the air conditioner 40 according to the 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 relative size relationship and shape of each constituent element may be different from the actual ones. In addition, in the following drawings, the ones with the same symbols refer to the same or equivalent ones, which are the same in the full text of the patent specification. In addition, in order to make it easy to understand, the terms indicating the direction (such as "up", "down", "right", "left", "front", "rear", etc.) are used appropriately, but these expressions are for ease of explanation , The description is just that, and does not limit the arrangement and direction of the device or components. Embodiment 1 [Centrifugal blower 1]

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

The centrifugal blower 1 is a double-suction type centrifugal blower 1 that is located in the axial direction of the rotating shaft RS of the fan 2 and sucks air from both sides. The configuration of the centrifugal blower 1 is that one side of the main board 2a has the same structure as the other side. Therefore, the structure of the centrifugal blower 1 is explained using FIG. 1, and the centrifugal blower on the opposite side of FIG. The illustration of the configuration of 1 is omitted.

First, using FIGS. 1 to 3, the basic structure of the centrifugal blower 1 will be explained. The centrifugal blower 1 is a centrifugal blower 1 of a multi-blade centrifugal type such as a Siloko fan or a turbo fan. The centrifugal blower 1 has 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 in the figure), and uses centrifugal force generated by the rotation to forcibly send air to the outside in the radial direction. The fan 2 is shown in Figs. 1 and 2 and has a disc-shaped main plate 2a and a plurality of blades 2d provided on the peripheral edge portion 2a1 of the main plate 2a. In addition, the main plate 2a may have a plate shape, and may have a shape other than a disk shape such as a polygonal shape. At the center of the main board 2a, a shaft portion 2b to which a motor (not shown in the figure) is connected is provided. The main board 2a is rotationally driven by a motor via the shaft portion 2b.

The plurality of blades 2d are arranged on a circumference centered on the shaft portion 2b, and the base end is fixed to the main plate 2a. A plurality of blades 2d are arranged in the axial direction of the rotating shaft RS of the fan 2, and are arranged on both sides of the main board 2a. The blades 2d are attached to the peripheral edge portion 2a1 of the main plate 2a, and are arranged at a fixed interval. Each blade 2d is formed in a curved rectangular plate shape, for example, and is installed so as to be inclined at a predetermined angle along the radial direction or with respect to the radial direction.

Each blade 2d is formed as a two-dimensional blade with the same cross-sectional shape continuous in the axial direction of the rotating shaft RS, but it may be a three-dimensional blade having a twisted shape. In addition, each blade 2d is installed to stand almost perpendicular to the main plate 2a, but it is not limited to this configuration, and each blade 2d may be installed to be inclined in the vertical direction of the main plate 2a.

The fan 2 is in the axial direction of the rotating shaft RS, and has annular side plates (not shown in the figure) at the ends of a plurality of blades 2d. The end of the blade 2d to which the side plate is attached is attached to the blade 2d, and the end of the side opposite to the side connected to the main plate 2a is attached. The side plate maintains the positional relationship of the head end of each blade 2d by connecting a plurality of blades 2d, and reinforces the plurality of blades 2d.

As shown in FIG. 1, the fan 2 is formed into a cylindrical shape by a plurality of blades 2d arranged on the main board 2a. In addition, the fan 2 is in the axial direction of the rotating shaft RS, and at the end of the blade 2d on the opposite side of the main plate 2a, a suction port 2e is formed. The suction port 2e allows gas to flow into the space surrounded by the main plate 2a and the plurality of blades 2d . In the fan 2, blades 2d are respectively arranged on both sides of the board surface constituting the main board 2a, and suction ports 2e are formed 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 driven to rotate around the rotating shaft RS. As the fan 2 rotates, the air outside the centrifugal blower 1 flows along the bell-shaped port 3, passes through the suction port 5 formed in the scroll casing 4 and the suction port 2e of the fan 2, and is sucked by the main board 2a and the plural The space enclosed by the blade 2d. Then, as the fan 2 rotates, the air sucked in the space surrounded by the main plate 2a and the plurality of blades 2d passes between the blades 2d and the adjacent blades 2d, and is sent to the radially outer side. (Volute Shell 4)

The scroll casing 4 is shown in Fig. 1 and houses the fan 2 inside. The scroll casing 4 rectifies the air blown from the fan 2. The scroll housing 4 is made of resin, but the scroll housing 4 is not limited to being made of resin. The scroll casing 4 has a scroll portion 41 and a discharge portion 42. (Scroll 41)

The volute 41 forms an air path that converts the dynamic pressure of the air flow generated by the fan 2 into static pressure. The scroll portion 41 has: a side wall 4a that covers the side wall 4a of the fan 2 from the axial direction of the shaft RS constituting the shaft portion 2b of the fan 2 and forms a suction port 5 for taking in air; It surrounds the fan 2 radially.

In addition, the scroll portion 41 has a tongue portion 43, which is located between the discharge portion 42 and the spiral start portion 41a of the peripheral wall 4c and constitutes a curved surface for blowing out the inflow from the suction port 5 in the centrifugal direction Throttle required to increase the pressure of the air. In addition, the radial direction of the rotating shaft RS is a direction perpendicular to the rotating shaft RS. The internal space of the volute 41 formed by the peripheral wall 4c and the side wall 4a becomes a space in which the air blown from the fan 2 flows along the peripheral wall 4c. (Side wall 4a)

The side walls 4a are in the axial direction of the rotating shaft RS of the fan 2 and are arranged on both sides of the fan 2. As shown in FIGS. 1 and 3, the side wall 4a of the scroll casing 4 is formed with a suction port 5 for taking in air so that air can circulate 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 so that the center of the suction port 5 and the center of the shaft portion 2b of the fan 2 are almost identical. In addition, the shape of the suction port 5 is not limited to a circular shape, and other shapes such as an ellipse may be used.

The scroll housing 4 of the centrifugal blower 1 is a double-suction type housing. The housing is located in the axial direction of the rotating shaft RS of the fan 2. On both sides of the main board 2a, there are side walls 4a forming the suction port 5. The scroll casing 4 of the centrifugal blower 1 has two side walls 4a, and the two side walls 4a are arranged to face each other.

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

The air suction port 5 provided in the side wall 4a is formed by a bell-shaped port 3 as shown in FIGS. 1 and 3. The bell-shaped port 3 rectifies the air sucked by the fan 2 and makes it flow into the suction port 2e of the fan 2. The bell mouth 3 is formed in such a way that the diameter of the opening gradually decreases from the outside to the inside of the scroll casing 4. With the side wall 4a having this structure, the air in the vicinity of the suction port 5 flows smoothly along the bell-shaped port 3 and flows into the fan 2 from the suction port 5 efficiently. (Peripheral wall 4c)

The peripheral wall 4c is a wall provided between the side walls 4a facing each other, and forms a curved surface at the turning R of the fan 2. The peripheral wall 4c guides the airflow generated by the fan 2 along the curved wall surface through the volute 41 to the discharge port 42a. The peripheral wall 4c is, for example, arranged in parallel with the axial direction of the rotating shaft RS of the fan 2 and covers the fan 2. In addition, the peripheral wall 4c may have a form inclined to the axial direction of the rotating shaft RS of the fan 2, and is not limited to a form arranged in parallel with the axial direction of the rotating shaft RS. The peripheral wall 4c covers the fan 2 from the radial direction to the rotating shaft RS, and constitutes an inner peripheral surface facing 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 FIGS. 2 and 3, and is arranged from the scroll starting portion 41a located at the boundary with the tongue 43 along the turning R of the fan 2 to the scroll ending portion 41b, the scroll ending portion 41b It is the boundary between the discharge portion 42 and the scroll portion 41 on the side away from the tongue portion 43. The spiral starting portion 41a is located on the peripheral wall 4c forming the curved surface, and is the end on the upstream side of the air flow generated by the rotation of the fan 2, and the spiral end portion 41b is downstream of the air flow generated by the rotation of the fan 2 The end of the side.

The peripheral wall 4c is formed into a spiral shape at the turning R. As the spiral shape, for example, a spiral shape such as a logarithmic spiral, an Archimedes spiral, or an involute curve. The inner peripheral surface of the peripheral wall 4c constitutes a curved surface that is smoothly curved along the circumferential direction of the fan 2 from the scroll start portion 41a that becomes the start of the scroll to the scroll end 41b that becomes the end of the scroll. With this configuration, the air sent from the fan 2 flows smoothly in the internal space between the fan 2 and the peripheral wall 4c in the direction toward the discharge portion 42. Therefore, in the scroll casing 4, the static pressure of the air rises efficiently from the tongue portion 43 to the discharge portion 42. (Discharge part 42)

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

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 extended plate 42b is formed so as to extend from the volute end portion 41b of the peripheral wall 4c, and is a plate-shaped part formed integrally with the peripheral wall 4c. The diffuser plate 42c is formed integrally with the tongue 43 of the scroll casing 4, and is a plate-shaped portion arranged to face the extension plate 42b. The diffuser plate 42c is formed to have a predetermined angle with the extended plate 42b in such a manner 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 first side wall 4a1 and the second side wall 4a2. In this manner, the discharge portion 42 is formed as a flow path with 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 casing 4, a tongue portion 43 is formed between the diffuser plate 42c of the discharge portion 42 and the scroll starting portion 41a of the peripheral wall 4c. The tongue 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 43.

The tongue 43 suppresses the inflow of air from the end of the scroll formed in the scroll casing 4 to the start of the scroll. The tongue 43 is provided in the upstream part of the ventilation path, and has a function of dividing the flow of the air in the direction of R to the fan 2 and the air flow in the discharge direction from the downstream part of the ventilation path to the discharge port 42a. In addition, the static pressure of the air flowing into the discharge portion 42 rises between passing through the scroll casing 4 and becomes a higher pressure than the inside of the scroll casing 4. Therefore, the tongue 43 has the function of separating this pressure difference. (Detailed structure of scroll shell 4)

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

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

The second box portion 46 is composed of 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 box portion 46 has a part of the bell-shaped mouth 3. The second box portion 46 is detachably fixed to the first box portion 45. When the second box section 46 is removed from the first box section 45, the fan 2 is exposed.

By combining the first box portion 45 and the second box portion 46, when viewed in parallel with the axial direction of the rotating shaft RS, a ring-shaped bell mouth 3 is formed. That is, when viewed in parallel with the axial direction of the rotating shaft RS, the suction port 5 of the scroll casing 4 is formed by combining the first box portion 45 and the second box portion 46.

The scroll casing 4 is used to house the fan 2 and has a partition 60 for ease of assembly. The division part 60 which is the junction part of the 1st box part 45 and the 2nd box part 46 is tied to the scroll casing 4, and is formed in the side wall 4a and the peripheral wall 4c. In addition, the division part 60 is formed in a part other than the discharge part 42. In more detail, the dividing portion 60 is formed in the direction of the air flowing through the discharge portion 42, and is formed in the area between the scroll starting portion 41a and the discharge port 42a which is the starting point of the scroll of the scroll casing 4 The part other than SA.

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

The dividing portion 60 is the flow direction of the air flowing inside the peripheral wall 4c as shown by the airflow AR in FIG. 2. As shown in FIGS. 2 and 3, it has a first dividing portion 61 formed on the upstream side of the airflow And the second division portion 62 formed on the downstream side of the airflow. The scroll casing 4 is connected to two divided parts 60 of the first divided part 61 and the second divided part 62, and the first box part 45 and the second box part 46 are joined. In other words, the scroll shell 4 is divided into two constituent elements of the first tank part 45 and the second tank part 46 in the two divided parts 60 of the first divided part 61 and the second divided part 62.

In the scroll casing 4, a fixed portion 20 is provided in 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 casing 4.

As shown in FIG. 3, the fixing part 20 has the 1st fixing part 20A and the 2nd fixing part 20B. The first fixed portion 20A is provided in the first divided portion 61, and the second fixed portion 20B is provided in the second divided portion 62. That is, the first fixing portion 20A is in the flow direction of the air flowing inside the peripheral wall 4c as shown by the airflow AR in FIG. The pair of first fixing portions 20A are provided on the downstream side of the air flow.

The fixing portion 20 is formed by, for example, a first engaging portion 21 and a second engaging portion 22 that are joined in a fitting manner. The first engaging portion 21 is provided in the first box portion 45, and the second engaging portion 21 is provided in the first box portion 45. The engaging portion 22 is provided in the second box portion 46. Alternatively, the fixing portion 20 may be formed by fixing the first engaging portion 21 provided on the first box portion 45 and the second engaging portion 22 provided on the second box portion 46 to each other by screws. In addition, the structure of the fixed part 20 is not limited to these structures. [Air Conditioner 40]

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

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

The air-conditioning device 40 includes: a centrifugal blower 1; a driving source 6, which applies driving force to the fan 2 of the centrifugal blower 1; and a heat exchanger 10, which is arranged in the scroll casing 4 of the centrifugal blower 1 The formed air outlet 42a is opposite to the position. In addition, the air conditioner 40 has a frame 16 which houses the centrifugal blower 1, the drive source 6, and the heat exchanger 10 inside, and is installed on the ceiling of the air-conditioned space. Furthermore, the air-conditioning apparatus 40 may have the heat insulating material 13 in the heat exchange chamber 26 mentioned later. (Frame 16)

The frame body 16 is formed into a box shape as shown in FIG. 4, and is formed into a rectangular parallelepiped shape including an upper surface portion 16a, a lower surface portion 16b, and a side surface portion 16c. In addition, the shape of the frame body 16 is not limited to a rectangular parallelepiped shape. For example, it may be cylindrical, prismatic, conical, a shape having a plurality of corners, a shape having a plurality of curved surfaces, and other shapes.

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. A filter for removing dust in the air can also be arranged at the suction port 18 of the frame. In addition, the frame body 16 is one of the side portions 16c, and has an outlet wall portion 16c2 that forms the frame body blow-out port 17.

In the frame body 16, the inlet wall portion 16c1 and the outlet wall portion 16c2 constitute side wall surfaces located on opposite sides to each other 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 rotating shaft RS of the centrifugal blower 1, and for example, the frame suction port 18 may be formed in the lower surface portion 16b.

The housing suction port 18 of the housing 16 passes the air flowing into the blower chamber 25 described later. The arrow IR shown in FIG. 6 represents the air sucked in by the suction port 18 of the casing. The frame air outlet 17 of the frame 16 passes through the air flowing out from the heat exchange chamber 26 described later. The arrow OR shown in FIG. 6 indicates the air blown out from the casing blowout port 17.

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

The internal space of the frame 16 is separated from the heat exchange chamber 26 by the partition wall 19, the air supply chamber 25 is the space on the suction side of the scroll shell 4, and the heat exchange chamber 26 is the blow-out side of the scroll shell 4 Space. That is, the partition plate 19 partitions the internal space of the frame body 16 into the air blowing chamber 25 where the fan 2 is arranged, and the heat exchange chamber 26 where the heat exchanger 10 is arranged. As shown in FIG. 5, the drive source 6, two centrifugal blowers 1, and the heat exchanger 10 are housed inside the housing 16. (Drive source 6)

The drive source 6 is, for example, a motor. The driving source 6 is supported by a motor bracket 9 a, and the motor bracket 9 a is fixed to the upper surface 16 a of the frame 16. The driving 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 forms the frame suction port 18, and the outlet wall portion 16c2 forms the frame blower port 17. (Centrifugal blower 1)

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

The air conditioner 40 is shown in FIG. 5, and the fan 2 of each of the two centrifugal blowers 1 is attached to the output shaft 6a. The centrifugal blower 1 with the fan 2 forms a flow of air, and the air is sucked into the casing 16 from the casing suction port 18 and blown out from the casing outlet 17 to the air-conditioned space. In addition, the number of centrifugal blowers 1 arranged in the frame 16 is not limited to two, and may be one or three or more.

As shown in FIG. 6, the second box portion 46 of the scroll casing 4 has a peripheral wall 4 c facing the casing suction port 18. No other component is provided between the peripheral wall 4c facing the housing suction port 18 and the housing suction port 18, and the peripheral wall 4c and the housing suction port 18 directly face each other.

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

Furthermore, as shown in FIG. 6, in a viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2, a substantially triangular area surrounded by the first virtual 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, installed outside the area SB surrounded by the first virtual line CL and the frame suction port 18 from the viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2 part.

The first fixed portion 20A is provided on the opposite side of the second fixed portion 20B via the rotating shaft RS. The second fixed portion 20B is provided on the opposite side of the first fixed portion 20A via the rotating shaft RS. In addition, the positional relationship between the first fixed portion 20A and the second fixed portion 20B is not limited to this relationship.

Similarly, the first division part 61 is provided on the opposite side of the second division part 62 via the rotation shaft RS. The second division portion 62 is provided on the opposite side of the first division portion 61 via the rotation shaft RS. In addition, the positional relationship between the first division portion 61 and the second division portion 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 frame 16 on the air path of the air discharged from the centrifugal blower 1. The heat exchanger 10 adjusts the temperature of the air. The air is sucked into the housing 16 from the housing suction port 18 and is blown out from the housing air outlet 17 to the air-conditioned space. In addition, a known structure can be applied to the heat exchanger 10.

The air conditioner 40 is from the casing suction port 18 of the air conditioner 40 to the casing blowout port 17, in the order of the casing suction port 18, the scroll casing 4 of the centrifugal blower 1, the heat exchanger 10, and the casing blowout port 17 Configured. In the case of the ceiling-suspended air conditioner 40, these constituent elements are arranged along the horizontal direction.

Fig. 7 is a side view schematically showing the internal structure of a modified example of the air-conditioning apparatus 40 of the first embodiment. The area SA is as described above. As an example, the case is described when viewed in a direction parallel to the axial direction of the rotating shaft RS of the fan 2. As shown in FIG. 3, it is the area between the edge 42d and the boundary 42e. However, the area SA system is not limited to this area. For example, as shown in FIG. 7, a virtual line passing through the spiral starting portion 41a of the scroll casing 4 and perpendicularly connected between the upper surface portion 16a and the lower portion 16b is defined as a virtual line FL, and the upper surface portion 16 a constitutes the upper surface of the frame 16, and the lower surface portion 16 b constitutes the lower surface of the frame 16. In this case, the area SA can also be regarded as the area of the scroll shell 4 formed between the virtual 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 drawn into the housing 16 through the housing suction port 18. The air sucked in the inside of the frame 16 flows along the bell-shaped opening 3 and is sucked into the inside of the fan 2. The air sucked by the fan 2 is blown out toward the radially outer side of the fan 2.

The air blown from the fan 2 is boosted while passing through the inside of the scroll casing 4. The pressurized air is blown out from the discharge port 42 a of the scroll casing 4 and is 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, and the temperature and humidity are adjusted. The air that has passed through the heat exchanger 10 is blown out from the housing blow-out port 17 to the air-conditioned space. [Effects of Air Conditioner 40]

The centrifugal blower 1 has a fixing portion 20 that fixes the first box portion 45 and the second box portion 46 to each other. The fixing portion 20 is provided on the side wall 4a. In addition, the fixing portion 20 is a viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2, and is provided at a portion other than the area SB surrounded by the first virtual line CL and the frame suction port 18. The first virtual line CL It is a virtual straight line connecting each of the two ends of the casing suction port 18 and the rotating shaft RS. The air-conditioning device 40 is positioned far away from the housing suction port 18 of the air-conditioning device 40. Therefore, it is possible to suppress the interference of the fast airflow flowing in from the housing suction port 18 with the fixed portion 20. Therefore, the air conditioner 40 suppresses the peeling of the air flow flowing through the bell mouth 3, and can suppress the reduction of the air volume of the gas flowing into the scroll casing 4.

FIG. 8 is a schematic diagram of the centrifugal blower 1L of the comparative example viewed in the axial direction of the rotating shaft RS. Fig. 9 is a divided schematic diagram of the centrifugal blower 1L of the comparative example. Fig. 10 is a schematic diagram showing an example of the internal structure of an air conditioner 40L of a comparative example. Using Figs. 8 to 10, the centrifugal blower 1L and the air conditioner 40L of the comparative example will be described.

As shown in FIG. 10, the air conditioner 40L of the comparative example has a centrifugal blower 1L. The scroll housing 4L of the centrifugal blower 1L is divided into two elements, a lower case 47L and an upper case 48L, as shown in Figs. 8 and 9 in order to house the fan 2 inside. The scroll casing 4L divided into two elements of the lower tank portion 47L and the upper tank portion 48L has a split portion 60L where the two elements are joined in the discharge portion 42L that constitutes the discharge port 42a of the scroll casing 4L. In addition, the scroll casing 4L is a divided portion 60 of the discharge portion 42L, and the suction port 5 of the scroll casing 4L is further provided with another divided portion 60L on the opposite side.

In the centrifugal blower 1L of the comparative example, in order to fix the two elements of the divided lower box part 47L and the upper box part 48L to each other, a fixing part 20L is provided in the vicinity of 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 port of the scroll casing, the airflow has a velocity distribution in the circumferential direction of the fan shaft, and the wind speed increases on the side of the suction port of the air conditioner. . Therefore, as shown in the area enclosed by the dotted line BD in FIG. 10, the air conditioner 40L of the comparative example is that the fixing portion 20L provided on the side of the housing suction port 18 of the air conditioner 40L may interfere with the airflow AR. In the air conditioner 40L, the fixed portion 20L provided on the side of the casing suction port 18 interferes with the airflow AR, and the airflow flowing through the bell-shaped port is peeled off, and the air volume of the gas flowing into the scroll casing 4L may decrease.

In contrast, the air conditioner 40 of the first embodiment is configured as described above, and the fixing portion 20 is located far away from the casing suction port 18 of the air conditioner 40, so that the fast airflow flowing in from the casing suction port 18 can be suppressed and fixed. Interference of Section 20. Therefore, the air conditioner 40 suppresses the peeling of the air flow flowing through the bell mouth 3, and can suppress the reduction of the air volume of the gas flowing into the scroll casing 4.

In addition, in the air conditioner 40L of the comparative example, the fixed portion 20 provided on the side of the casing suction port 18 interferes with the airflow AR, thereby generating noise, which may increase the noise generated from the air conditioner 40L.

In contrast, the air conditioner 40 of the first embodiment is configured as described above, and the fixing portion 20 is located far away from the casing suction port 18 of the air conditioner 40, so that the fast airflow flowing in from the casing suction port 18 can be suppressed and fixed. Interference of Section 20. Therefore, the air conditioner 40 can suppress the occurrence of noise caused by the interference of the fast airflow flowing in from the casing suction port 18 and the fixed portion 20, and can make the noise generated from the air conditioner 40 be higher than that of the air conditioner of the comparative example. The device 40L is lowered.

In addition, generally, the airflow flowing in the scroll casing is boosted toward the discharge port of the scroll casing. In the air conditioner 40L of the comparative example, since the split portion 60L is provided in the discharge portion 42L constituting the discharge port 42a of the scroll casing 4L, air that has been boosted and becomes high-pressure easily leaks from the split portion 60L of the discharge portion 42L.

In contrast, in the air conditioner 40 of the first embodiment, the divided portion 60 is formed in a portion other than the discharge portion 42. In the air conditioner 40 of the first embodiment, since the split portion 60 is not formed in the discharge portion 42 through which high-pressure air passes, it is possible to suppress the leakage of air in the split portion 60 compared with the air conditioner 40L of the comparative example.

In addition, the air conditioner 40 of the first embodiment is based on the flow direction of the air flowing through the discharge part 42. The dividing part 60 is formed in the part outside the area SA between the scroll start part 41a and the discharge port 42a, and the scroll shape rises. The starting portion 41a is a portion that becomes the starting point of the scroll shape of the scroll shell 4. That is, the division part 60 of the air conditioner 40 of Embodiment 1 is not formed in the discharge part 42. As shown in FIG. In the air conditioner 40 of the first embodiment, since the split portion 60 is not formed in the discharge portion 42 through which high-pressure air passes, it is possible to suppress the leakage of air in the split portion 60 compared with the air conditioner 40L of the comparative example.

In addition, the air conditioner 40 constitutes an inlet wall portion 16c1 and an outlet wall portion 16c2 via a heat exchanger 10 and a centrifugal blower 1 on opposite side wall surfaces. The inlet wall portion 16c1 forms the frame suction port 18, and the outlet The wall portion 16c2 forms the frame body blowing port 17. Therefore, the air conditioner 40 can arrange the inlet wall portion 16c1, the centrifugal blower 1, the heat exchanger 10, and the outlet wall portion 16c2 along the horizontal direction, and can be constructed from the housing suction port 18 to the housing with a simple configuration Wind path from 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. Embodiment 2 [Air Conditioner 40A]

Fig. 11 is a side view schematically showing an example of the internal structure of the air-conditioning apparatus 40A according to the second embodiment. The parts having the same configuration as that of the air-conditioning apparatus 40 of FIGS. 1 to 10 are given the same reference numerals, and the description thereof is omitted. The air conditioner 40A of the second embodiment further specifies the positions of the divided portion 60 and the fixed portion 20 of the centrifugal blower 1A to be accommodated. Therefore, in the following description, referring to Fig. 11, the configuration of the positions of the divided portion 60 and the fixed portion 20 of the centrifugal blower 1A will be mainly described. In addition, the configuration of the air conditioner 40A and the centrifugal blower 1A of the second embodiment is the same as the configuration of the air conditioner 40 and the centrifugal blower 1 of the first embodiment unless otherwise specified.

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

The dividing part 60 of the air conditioner 40A is provided with a fixing part 20. Therefore, the air conditioner 40A is located between the housing suction port 18 and the housing blow-out port 17, and one of the first fixed portion 20A and the second fixed section 20B is formed closer to the housing blow-off port 17 than the other. That is, the first fixed portion 20A and the second fixed portion 20B of the centrifugal blower 1A are formed at positions shifted from each other in the left-right direction.

Here, in the viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2, the portion located at the inner edge of the suction port 5 at the first divided portion 61 is defined as the first inner edge portion 5a, and the portion at the second divided portion The portion 62 located at the inner edge of the suction port 5 is defined as the second inner edge 5b. It is also possible that the scroll casing 4 is set at the viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2, and the second virtual line TL is formed closer to the casing outlet 17 than the rotating shaft RS, and the second virtual line TL is A virtual straight line connecting the first inner edge portion 5a and the second inner edge portion 5b. [Effects of Air Conditioner 40A]

The air conditioner 40A has the same effect as the air conditioner 40 because the position where the divided portion 60 is formed and the position where the fixed portion 20 is installed are the same as the air conditioner 40 of the first embodiment.

The air conditioner 40A is located between the housing suction port 18 and the housing blow-out port 17, and one of the first divided portion 61 and the second divided section 62 is formed closer to the housing blow-off port 17 than the other. 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 location away from the casing suction port 18.

Therefore, the speed of the airflow that interferes with the fixed portion 20 formed away from the housing suction port 18 of the air conditioner 40A becomes a low speed. Since the speed of the airflow that interferes with the fixed portion 20 becomes low, the airflow flowing through the bell mouth 3 is suppressed from peeling off. Therefore, the air conditioner 40A can suppress a decrease in the amount of air flowing into the scroll casing 4. In addition, since the speed of the airflow that interferes with the fixed portion 20 becomes low, the air conditioner 40A can suppress the generation of noise due to the interference between the airflow and the fixed portion 20, and can reduce the noise from the air conditioner 40L compared to the air conditioner 40L. Noise generated by device 40A.

In addition, the centrifugal blower 1A considers the balance of the surface areas of the first tank part 45 and the second tank part 46. When the air conditioner 40A has this configuration, the surface area of the first tank part 45 and the second tank part 46 can be balanced while ensuring the distance between the fixing part 20 and the casing suction port 18.

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

Therefore, the speed of the airflow that interferes with the fixed portion 20 of the air conditioner 40A becomes a low speed. Since the speed of the airflow that interferes with the fixed portion 20 becomes low, the airflow flowing through the bell mouth 3 is suppressed from peeling off. Therefore, the air conditioner 40A can suppress a decrease in the amount of air flowing into the scroll casing 4. In addition, since the speed of the airflow that interferes with the fixed portion 20 becomes low, the air conditioner 40A can suppress the generation of noise due to the interference between the airflow and the fixed portion 20, and can reduce the noise from the air conditioner 40L compared to the air conditioner 40L. Noise generated by device 40A. Embodiment 3 [Air Conditioner 40B]

Fig. 12 is a side view schematically showing an example of the internal structure of the air-conditioning apparatus 40B of the third embodiment. The parts having the same configuration as that of the air-conditioning device 40 and the like in FIGS. 1 to 11 are given the same reference numerals, and the description thereof will be omitted. The air conditioner 40B of the third embodiment more specifically specifies the structure of the divided portion 60 of the centrifugal blower 1B accommodated. Therefore, in the following description, FIG. 12 is used, and the structure of the division part 60 of the centrifugal blower 1B is mainly demonstrated. In addition, the structure of the air conditioner 40B and the centrifugal blower 1B of Embodiment 3 is the same as the structure of the air conditioner 40 and the centrifugal blower 1 of Embodiment 1, unless otherwise stated.

The centrifugal blower 1B has a scroll casing 4B. A part of the peripheral wall 4c of the scroll casing 4B has a flat surface 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, and the peripheral wall 4c is formed in a spiral shape. When viewed from the axial direction of the rotating shaft RS of the fan 2, the flat surface portion 65 is formed in a linear shape.

The scroll casing 4B forms a divided portion 60 by dividing the plane portion 65. That is, the flat portion 65 is formed in the dividing portion 60. The flat surface 65 formed in the first split portion 61 and the flat surface 65 formed in the second split portion 62 may be formed in parallel from a viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2. However, the scroll casing 4B is not limited to a configuration in which the flat surface 65 of the first split portion 61 and the flat surface 65 of the second split portion 62 are formed in parallel. [Effects of air conditioner 40B]

The air-conditioning device 40B has the same effect as the air-conditioning device 40 because the position where the dividing portion 60 is formed and the position where the fixing portion 20 is installed are the same as the air-conditioning device 40 of the first embodiment.

In addition, the air-conditioning device 40B forms the divided portion 60 so as to divide the plane portion 65. In the case of the resin-made first box portion 45 and the resin-made second box portion 46, the split portion 60 has a flat surface 65, so that the first box portion 45 and the second box portion 46 can be easily removed from the mold, and the air conditioner The manufacturing operation of the device 40B becomes easy.

In addition, the flat surface 65 formed in the first split portion 61 and the flat surface 65 formed in the second split portion 62 are formed in parallel at a viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2. In the case of the resin-made first box portion 45 and the second box portion 46, as long as the flat surface 65 of the first split portion 61 and the flat surface 65 of the second split portion 62 are formed in parallel, the first box can be easily removed from the mold Part 45 and the second box part 46, and the production of the air-conditioning device 40B becomes easy. Embodiment 4 [Air Conditioner 40C]

Fig. 13 is a side view schematically showing an example of the internal structure of the air-conditioning apparatus 40C according to the fourth embodiment. In addition, the parts having the same configuration as the air conditioner 40 of FIGS. 1 to 12 and the like are given the same reference numerals, and the description thereof will be omitted. The air conditioner 40C of the fourth embodiment further specifies the positions of the divided portion 60 and the fixed portion 20 of the centrifugal blower 1C accommodated. Therefore, in the following description, Fig. 13 is used, and the configuration of the positions of the divided portion 60 and the fixed portion 20 of the centrifugal blower 1C will be mainly described. In addition, the configuration of the air conditioner 40C and the centrifugal blower 1C of the fourth embodiment is the same as the configuration of the air conditioner 40 and the centrifugal blower 1 of the first embodiment unless otherwise specified.

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

Furthermore, as shown in FIG. 13, in the viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2, the first reference line SL1 is defined as a virtual straight line connecting the spiral starting portion 41a and the rotating shaft RS. SL1 defines the position of the center of the spiral starting portion 41a and the rotating shaft RS as the intermediate position M1. In addition, a virtual straight line extending in the vertical direction including the intermediate position M1 is defined as the 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 which is located between the second reference line SL2 and the frame suction port 18. Therefore, as shown in FIG. 13, the fixing part 20 is provided in the area|region SC between the area|region SB and the 2nd reference line SL2 in the side wall 4a. [Effects of air conditioner 40C]

The air conditioner 40C has the same effect as the air conditioner 40 because the position where the divided portion 60 is formed and the position where the fixed portion 20 is installed are the same as the air conditioner 40 of the first embodiment.

In addition, the fixing portion 20 is provided on the side wall 4 a which is located between the second reference line SL2 and the housing suction port 18. The air-conditioning device 40C is positioned far away from the housing suction port 18 of the air-conditioning device 40C, so that the interference of the fast airflow flowing in from the housing suction port 18 and the fixed portion 20 can be suppressed. Therefore, the air conditioner 40C suppresses the peeling of the air flow flowing through the bell mouth 3, and can suppress the decrease in the air volume of the gas flowing into the scroll casing 4.

In addition, by providing the fixing portion 20 on the side wall 4a located between the second reference line SL2 and the frame suction port 18, the centrifugal blower 1C can balance the surface areas of the first tank portion 45 and the second tank portion 46. Embodiment 5 [Air Conditioner 40D]

Fig. 14 is a side view schematically showing an example of the internal structure of the air-conditioning apparatus 40D according to the fifth embodiment. In addition, parts having the same configuration as the air conditioner 40 in FIGS. 1 to 13 are assigned the same reference numerals, and the description thereof will be omitted. The air conditioner 40D of the fifth embodiment is attached to the housing 16D, and the formation position of the housing suction port 18 is different from the formation position of the housing suction port 18 of the air conditioner 40 of the first embodiment. In the following description, using FIG. 14, the relationship between the frame 16D and the centrifugal blower 1 will be mainly described. In addition, the structure of the air-conditioning apparatus 40D of Embodiment 5 is the same as the structure of the air-conditioning apparatus 40 of Embodiment 1, unless otherwise stated.

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

As shown in FIG. 14, the second box portion 46 of the scroll casing 4 has a peripheral wall 4 c facing the casing suction port 18. No other constituent elements are provided between the peripheral wall 4c facing the housing suction port 18 and the housing suction port 18, and the peripheral wall 4c and the housing suction port 18 directly face each other.

Here, as shown in FIG. 14, in a viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2, each of the end 18d and the end 18e of the suction port 18 of the frame body is connected to the virtual of the rotating shaft RS. The straight line is defined as the first virtual line CL. When viewed from the axial direction of the rotating shaft RS, the end 18d is the end on the side of the frame blower outlet 17 or the end on the front side of the frame 16D. The end 18e is an end on the back side of the frame 16D. In addition, here, it is attached to the frame body 16D, and the side surface forming the frame body outlet 17 is regarded as the front side of the frame body 16D, and the side face side opposite to the frame body outlet 17 is regarded as the frame body 16D. The back side.

Furthermore, as shown in FIG. 14, in a viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2, a substantially triangular area surrounded by the first virtual 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. 14, installed outside the area SB surrounded by the first virtual line CL and the frame suction port 18 in a viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2 part. [Effects of Air Conditioner 40D]

The air-conditioning device 40D has the same effect as the air-conditioning device 40 because the position where the dividing portion 60 is formed and the position where the fixing portion 20 is installed are the same as the air-conditioning device 40 of the first embodiment.

In addition, the inlet wall portion 16b1 forming the frame body 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 blow-out port 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 can discharge air-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 the air-conditioning apparatus 40E according to the sixth embodiment. In addition, the parts having the same configuration as the air conditioner 40 in FIGS. 1 to 14 are assigned the same reference numerals, and the description thereof will be omitted. The air conditioner 40E of the sixth embodiment is attached to the housing 16E, and the formation position of the housing suction port 18 is different from the formation position of the housing suction port 18 of the air conditioner 40 of the first embodiment. In the following description, using FIG. 15, the relationship between the frame 16E and the centrifugal blower 1 will be mainly described. In addition, the structure of the air-conditioning apparatus 40E of Embodiment 6 is the same as the structure of the air-conditioning apparatus 40 of Embodiment 1, unless otherwise stated.

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

In addition, the frame body 16E is one of the side portions 16c, and has an inlet wall portion 16c1 forming the frame body suction port 18. In the housing 16E, the inlet wall portion 16c1 and the outlet wall portion 16c2 constitute side wall surfaces located on opposite sides to each other via the heat exchanger 10 and the centrifugal blower 1. The frame body 16E is formed with 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 casing 4 has a peripheral wall 4c opposed to two air suction ports, and the two air suction ports are formed in the frame formed by the inlet wall portion 16b1 The suction port 18 and the frame suction port 18 formed in the inlet wall portion 16c1. No other constituent elements are provided between the peripheral wall 4c facing the housing suction port 18 and the housing suction port 18, and the peripheral wall 4c and the housing suction port 18 directly face each other.

Here, as shown in FIG. 15, from the viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2, the shortest virtual straight line connecting 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 where the frame suction port 18 is formed.

In addition, from the viewpoint viewed from the axial direction of the rotating shaft RS of the fan 2, the shortest virtual straight line connecting the inlet wall portion 16b1 and forming the frame suction port 18 and the rotating shaft RS is defined as a longitudinal straight line EL2. The longitudinal straight line EL2 is a straight line perpendicular to the surface of the inlet wall portion 16b1 where the frame suction port 18 is formed.

Furthermore, from the viewpoint of the axial direction of the rotating shaft RS of the fan 2, the area enclosed by the frame suction port 18 of the inlet wall portion 16c1, the horizontal straight line EL1, the frame body suction port 18 of the inlet wall portion 16b1, and the vertical straight line EL2 Defined as area SE.

The air conditioner 40E does not include the fixed part 20 and the divided part 60 in the area SE. [Effects of air conditioner 40E]

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

Therefore, the air conditioner 40E can suppress the amount of airflow that interferes with the fixed portion 20. The air conditioner 40E suppresses the amount of airflow that interferes with the fixed portion 20, and because it suppresses the peeling of the airflow flowing through the bell mouth 3, it is possible to suppress a decrease in the amount of air flowing into the scroll casing 4. In addition, the air conditioner 40E suppresses the amount of airflow that interferes with the fixed portion 20, and can suppress the noise generated by the interference between the airflow and the fixed portion 20. Compared with the air conditioner 40L, the air conditioner can be reduced The noise generated by 40E.

Moreover, the air conditioner 40E does not include the fixed part 20 and the divided part 60 in the area|region SE. The air-conditioning device 40E interferes with the fixed part 20, and the speed of the airflow becomes low. The fixed part 20 is formed away from the frame suction port 18 formed in the inlet wall part 16b1 and the frame formed in the inlet wall part 16c1 The suction port 18 is where the two air suction ports are located. Since the velocity of the airflow that interferes with the fixed portion 20 becomes low, the airflow flowing through the bell mouth 3 is suppressed from peeling off, so the air conditioner 40E can suppress the decrease of the airflow volume of the gas flowing into the scroll casing 4. In addition, since the speed of the airflow that interferes with the fixed portion 20 becomes low, the air conditioner 40E can suppress the noise generated by the interference between the airflow and the fixed portion 20, and can reduce the noise from the air conditioner compared to the air conditioner 40L. Noise generated by device 40E.

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

The above-mentioned Embodiments 1 to 6 can be implemented in combination with each other. In addition, the configuration shown in the above embodiment is an example, and may be combined with other well-known technologies, and a part of the configuration may be omitted or changed without departing from the scope of the subject matter.

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: Volute shell 4B: Volute shell 4L: Volute shell 4a: side wall 4a1: 1st side wall 4a2: 2nd side wall 4c: peripheral wall 4c11: first end 4c12: 2nd end 5: suction port 5a: 1st inner edge 5b: 2nd 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 16c1: entrance wall 16c2: Outlet wall 17: Frame blower outlet 18: Frame suction port 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 room 40: Air-conditioning device 40A: Air conditioner 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: scroll end 42: Discharge part 42L: Discharge part 42a: Outlet 42b: Extension board 42c: diffuser plate 42d: margin 42e: Boundary 43: Tongue 45: Box 1 46: Box 2 47L: lower case 48L: upper case 60: Division 60L: Division 61: Division 1 62: Division 2 65: Plane AR: Airflow BD: dotted line CL: 1st virtual line EL1: Horizontal straight line EL2: Longitudinal straight line FL: virtual line IR: Arrow M1: middle position OR: Arrow R: Steering RS: shaft SA: area SB: area SC: area SE: area SL1: The first baseline SL2: The second baseline TL: The second virtual line

Fig. 1 is a perspective view of the centrifugal blower of the first embodiment. [Fig. 2] A schematic diagram of the centrifugal blower of Embodiment 1 viewed in the axial direction of the rotating shaft. [Fig. 3] A schematic diagram of the exterior of the centrifugal blower of Embodiment 1 viewed in the axial direction of the rotating shaft. Fig. 4 is a perspective view schematically showing an example of the air-conditioning apparatus according to Embodiment 1. Fig. 5 is a schematic diagram showing an example of the internal structure of the air-conditioning apparatus according to the first embodiment. Fig. 6 is a side view schematically showing an example of the internal structure of the air-conditioning apparatus according to Embodiment 1. Fig. 7 is a side view schematically showing the internal structure of a modified example of the air-conditioning apparatus according to Embodiment 1. [Figure 8] is a schematic view of the centrifugal blower of the comparative example viewed in the axial direction of the rotating shaft. [Figure 9] is a divided schematic diagram of the centrifugal blower of the comparative example. Fig. 10 is a schematic diagram showing an example of the internal structure of an air conditioner of a comparative example. Fig. 11 is a side view schematically showing an example of the internal structure of the air-conditioning apparatus according to Embodiment 2. Fig. 12 is a side view schematically showing an example of the internal structure of the air-conditioning apparatus according to the third embodiment. Fig. 13 is a side view schematically showing an example of the internal structure of the air conditioner according to Embodiment 4. Fig. 14 is a side view schematically showing an example of the internal structure of the air-conditioning apparatus according to the fifth embodiment. Fig. 15 is a side view schematically showing an example of the internal structure of the air-conditioning apparatus according to the sixth embodiment.

1: Centrifugal blower

3: bell mouth

4: Volute shell

4c: peripheral wall

10: Heat exchanger

13: Insulation material

16: frame

16b: lower part

16c1: entrance wall

16c2: Outlet wall

17: Frame blower outlet

18: Frame suction port

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 room

40: Air-conditioning device

41a: Scroll start

42: Discharge part

42a: Outlet

42d: margin

42e: Boundary

43: Tongue

45: Box 1

46: Box 2

60: Division

61: Division 1

62: Division 2

CL: 1st virtual line

IR: Arrow

OR: Arrow

RS: shaft

SA: area

SB: area

Claims (7)

An air conditioner, which is: include: A centrifugal blower includes a fan that is driven to rotate; and a volute casing, which accommodates the fan, and has a peripheral wall formed in a volute shape and a side wall provided with an air suction port; The driving source is to give driving force to the fan; The heat exchanger is arranged at a position opposite to the air outlet formed in the scroll shell; and The frame is a frame that houses the centrifugal blower, the drive source and the heat exchanger, and has partitions separating the inside of the air blowing chamber where the fan is placed and the heat exchange chamber where the heat exchanger is placed, forming The frame body suction port through which the air flowing into the air blowing chamber passes, and the frame body blowing outlet through which the air flowing out of the heat exchange chamber passes; The scroll shell system 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 portion has the peripheral wall facing the suction port of the frame body, and is detachably fixed to the first box portion; and The fixing part is arranged on the side wall and fixes the first box part and the second box part; The dividing part of the joining 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 fixing part is set at a point of view from the axial direction of the rotating shaft of the fan, and is provided at a part outside the area enclosed by the first virtual line and the suction port of the frame, and the first virtual line connects the frame Each of the two ends of the suction port is a virtual straight line with the axis of rotation. Such as the air-conditioning device of claim 1, where The frame system has: The entrance wall forming the suction port of the frame body; and The outlet wall forming the blow-out port of the frame body; The inlet wall portion and the outlet wall portion constitute side wall surfaces located on opposite sides to each other via the heat exchanger and the centrifugal blower. Such as the air conditioner of claim 1 or 2, where The dividing part is the flow direction of the air flowing inside the peripheral wall, and has: The first division formed on the upstream side; and The second cut formed on the downstream side; Between the casing suction port and the casing blow-out port, one of the first divided portion and the second divided portion is formed at a position closer to the casing blow-out port than the other. Such as the air-conditioning device of claim 3, where In a viewpoint viewed from the axial direction of the rotating shaft, the portion located at the inner edge of the suction port at the first divided portion is regarded as the first inner edge portion, and the second divided portion is located between the suction inlet When the part of the inner edge is regarded as the second inner edge, The second virtual line of the virtual straight line connecting the first inner edge portion and the second inner edge portion of the scroll shell is formed at a position closer to the discharge port than the rotating shaft. Such as the air conditioner of claim 1 or 2, where The fixed part is at the viewpoint viewed from the axial direction of the rotating shaft of the fan, and is on the first reference line of the virtual straight line connecting the starting part of the scroll of the scroll casing and the starting point of the scroll. The position of the center is regarded as the middle position, The fixing portion is provided on the side wall located between a second reference line and the frame suction port, and the second reference line is a virtual straight line extending in the up-down direction including the intermediate position. Such as the air-conditioning device of claim 1, where The frame system has: The entrance wall forming the suction port of the frame body; and The outlet wall forming the blow-out port of the frame body; The entrance wall constitutes the wall below the frame; The outlet wall constitutes a wall of the side surface of the frame. Such as the air conditioner of claim 1 or 2, where The peripheral wall has a flat portion that forms a part of the wall in the shape of a flat plate; The volute casing forms the divided portion in a manner of dividing the plane portion.

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