JP2014142162A - Indoor equipment of air conditioner and air conditioner including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide indoor equipment of an air conditioner which secures a larger blast area of a fan part compared to conventional indoor equipment and inhibits the enlargement of the indoor equipment even when an outer diameter of a motor is increased.SOLUTION: In indoor equipment 40, a motor 10 for driving a fan is connected with two fans 4 by a belt drive mechanism 30 and an outer diameter of a boss of each fan 4 is set so as to be smaller than an outer diameter of a body of the motor 10. Further, in the indoor equipment 40, the motor 10 is disposed at a position that does not overlap with the fans 4 on a plane perpendicular to a rotation shaft 17 of the motor 10. In an arrangement relationship between the motor 10 and the fans 4 which is viewed in a direction of the rotation shaft 17 of the motor 10, at least a part of the body of the motor 10 is disposed at a position that overlaps with blades of the fans 4.

Description

  The present invention relates to an indoor unit in which a fan and a heat exchanger are housed in a casing, and an air conditioner including the indoor unit.

  Conventionally, there is an indoor unit of an air conditioner in which a fan and a heat exchanger are housed in a casing. As such, “a casing in which an inlet is formed in the upper part and an outlet is formed in the lower part, an axial-flow type or mixed-flow type fan provided on the downstream side of the inlet in the casing, and the casing An indoor unit of an air conditioner provided with a heat exchanger provided on the downstream side of the fan and upstream of the air outlet to exchange heat between the air blown from the fan and the refrigerant. It has been proposed (see, for example, Patent Document 1). In this indoor unit of the air conditioner, the fan is provided on the upstream side of the heat exchanger, so the flow of air flowing into the fan is less turbulent, and this suppresses noise generated from the fan. Can do.

WO2010 / 089920

  An air conditioner having an axial flow type or mixed flow type fan as in Patent Document 1 includes a fan drive motor for each fan, and the fan drive motor is directly connected to a fan boss. That is, the air conditioner having an axial flow type or mixed flow type fan as in Patent Document 1 has a configuration in which a fan driving motor is arranged at the center of the fan. For this reason, the ventilation area of the fan portion is a donut-shaped annular region sandwiched between the fan boss or the larger motor outer diameter and the fan outer diameter (≈Belmouth inner diameter). By increasing the ventilation area, it is possible to configure a fan with high air blowing performance that can reduce aerodynamic noise at the same air volume, reduce the ventilation speed (dynamic pressure loss), and reduce power consumption.

  However, in recent years, in order to save energy and increase the capacity of indoor units, designs that increase the air flow rate are often performed. Furthermore, in recent years, it has been difficult to reduce the size of a motor in order to reduce the amount of rare earth used as a material for strong magnets. That is, in recent years, fan driving motors tend to become larger. For this reason, the air conditioner having an axial flow type or mixed flow type fan as in Patent Document 1 has a large fan driving motor outer diameter, which makes it difficult to expand the ventilation area of the fan portion. There was a problem that it was difficult to improve fan performance. In addition, the air conditioner having an axial flow type or mixed flow type fan as in Patent Document 1 has a problem that the indoor unit of the air conditioner also increases in size as the fan driving motor increases in size. It was.

  The present invention has been made to solve the above-described problems. Even when the outer diameter of the motor is increased, the ventilation area of the fan portion can be ensured larger than the conventional one, and the indoor unit is increased in size. An object of the present invention is to obtain an indoor unit of an air conditioner that can suppress the above and an air conditioner equipped with the indoor unit.

  An indoor unit of an air conditioner according to the present invention includes a casing in which an inlet and an outlet are formed, and a plurality of axial or mixed flow fans provided downstream of the inlet in the casing. And at least one fan driving motor for driving the plurality of fans, and air and refrigerant blown out of the fan, provided on the downstream side of the fan in the casing and upstream of the outlet. A heat exchanger for exchanging heat, and the fan driving motor has a larger number of the fan driving motor than the fan driving motor by a belt drive mechanism having a belt for transmitting the driving force of the fan driving motor to the fan. The fan driving motor and the fan connected to the fan and connected by the belt drive mechanism are from an outer diameter of a main body of the fan driving motor. The fan boss has a small outer diameter, and the fan drive motor is disposed at a position where the fan drive motor does not overlap the fan on a plane orthogonal to the rotation axis of the fan drive motor. In the arrangement relationship between the fan driving motor and the fan in the rotation axis direction, at least a part of the main body of the fan driving motor is arranged at a position where it overlaps the blades of the fan.

  Moreover, the air conditioner which concerns on this invention is provided with the indoor unit of the air conditioner which concerns on this invention.

In the present invention, the fan driving motor is connected to a larger number of fans than the fan driving motor by a belt drive mechanism having a belt that transmits the driving force of the fan driving motor to the fan. The fan driving motor and the fan connected by the belt drive mechanism have a fan boss whose outer diameter is smaller than the outer diameter of the fan driving motor body, and is orthogonal to the rotational axis of the fan driving motor. In the plane, the fan driving motor is arranged at a position where it does not overlap the fan. For this reason, the present invention can ensure a larger ventilation area than that of the conventional fan even when the motor outer diameter is increased. Therefore, the present invention can reduce aerodynamic noise at the same air volume, reduce the ventilation speed (dynamic pressure loss), and reduce power consumption.
Further, in the present invention, the fan drive motor and the fan connected by the belt drive mechanism are arranged in the relationship between the fan drive motor and the fan in the rotational axis direction of the fan drive motor. At least a portion is disposed at a position overlapping the fan blades. For this reason, this invention can also make the dimension of the rotating shaft direction of the motor for fan drive in the indoor unit of an air conditioner compact.

It is a longitudinal cross-sectional view of the main components which show an example of the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention. It is a perspective view which shows the fan unit of the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention. It is a bottom view which shows the fan unit of the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention. It is explanatory drawing for demonstrating the example of arrangement | positioning of the fan and motor in the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention. It is explanatory drawing for demonstrating another example of arrangement | positioning of the fan and motor in the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention. It is explanatory drawing for demonstrating another example of arrangement | positioning of the fan and motor in the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention. It is explanatory drawing for demonstrating another example of arrangement | positioning of the fan and motor in the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention. It is explanatory drawing for demonstrating another example of arrangement | positioning of the fan and motor in the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention. It is explanatory drawing for demonstrating another example of arrangement | positioning of the fan and motor in the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention. It is explanatory drawing for demonstrating another example of arrangement | positioning of the fan and motor in the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention. It is explanatory drawing for demonstrating another example of arrangement | positioning of the fan and motor in the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention. It is a bottom view which shows the fan unit of the indoor unit of the air conditioner which concerns on Embodiment 3 of this invention. It is AA sectional drawing of FIG. It is sectional drawing which shows another example of the fan support in the indoor unit of the air conditioner which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
Hereinafter, an indoor unit of an air conditioner according to Embodiment 1 of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of main components showing an example of an indoor unit of an air conditioner according to Embodiment 1 of the present invention. Based on FIG. 1, the structure of the indoor unit 40 which concerns on this Embodiment 1 is demonstrated.
The indoor unit 40 supplies conditioned air to an air-conditioning target area such as a room by using a refrigeration cycle in which a refrigerant is circulated. In the following drawings, the size and detailed shape of each component may be different from the actual one. Moreover, the case where the indoor unit 40 is a wall hanging type attached to the wall surface of the air-conditioning target area is shown as an example.

  The indoor unit 40 is mainly housed in the casing 1 in which a suction port 2 for sucking indoor air into the interior and a blower outlet 3 for supplying conditioned air to an air-conditioning target area are formed. The fan 4 sucks room air from the suction port 2 and blows out the conditioned air from the blower outlet 3, and is arranged in the air path from the fan 4 to the blower outlet 3. The refrigerant and the room air exchange heat so that the conditioned air is exchanged. And a heat exchanger 5 for producing

  The casing 1 is a general term for a portion that forms the skeleton of the indoor unit 40 and is configured for the purpose of the structure of the air passage, and may be configured by a combination of a plurality of parts or may be an integrated structure. In the first embodiment, as shown in FIG. 1, the rear casing 1a, the upper casing 1b, the front casing 1c, and the side casing 1d constitute the casing 1, and these form a closed air passage. Here, as described above, the indoor unit 40 according to the first embodiment has the fan 4 arranged on the upstream side of the heat exchanger 5. That is, the indoor unit 40 according to Embodiment 1 is configured to push air into the heat exchanger 5 by the fan 4. For this reason, when the sealing degree of the casing 1 is low, the air discharged from the fan 4 flows out of the gap of the casing 1 without passing through the heat exchanger 5. For this reason, in the indoor unit 40 which concerns on this Embodiment 1 which has arrange | positioned the fan 4 in the upstream of the heat exchanger 5, the air path until the air discharged from the fan 4 passes the heat exchanger 5 Therefore, it is necessary to efficiently exchange heat by guiding the air discharged from the fan 4 to the heat exchanger 5 without leakage.

  The suction port 2 is formed in the upper part of the casing 1. The blower outlet 3 has an opening formed in the lower part of the casing 1 (more specifically, on the lower side of the front part of the casing 1). The fan 4 is, for example, an axial flow type or mixed flow type fan, and is disposed downstream of the suction port 2 and upstream of the heat exchanger 5. The heat exchanger 5 is disposed on the leeward side of the fan 4. For example, a fin tube type or corrugated fin type heat exchanger is used for the heat exchanger 5. The suction port 2 of the fan 4 is provided with a finger guard 6 for preventing contact with the rotating fan 4 and an air filter 7 for filtering out dust contained in room air. Furthermore, the blower outlet 3 is provided with a mechanism for controlling the blowing direction of the airflow, such as a vane (not shown). It should be noted that the electric board and the like for controlling the fan driving motor and the vane driving motor of the indoor unit 40 are omitted from FIG.

  Next, a configuration near the fan 4 of the indoor unit 40 according to Embodiment 1 will be described.

  FIG. 2 is a perspective view showing a fan unit of the indoor unit of the air conditioner according to Embodiment 1 of the present invention. FIG. 3 is a bottom view showing the fan unit. FIG. 2 is a perspective view of the fan unit observed from above.

  As shown in FIGS. 2 and 3, the indoor unit 40 according to the first embodiment is configured to be attached to the casing 1 after the fan 4 is assembled as the fan unit 20. The fan unit 20 includes a base plate 21, a plurality of fans 4 (two in the first embodiment), a motor 10 that is a fan driving motor for driving the fans 4, and a plurality of fans 4 and motors 10. A belt drive mechanism 30 is provided. The motor 10 is attached to the base plate 21 by, for example, forming a long hole in the base plate 21 and fastening the motor 10 and the base plate 21 with a bolt passed through the long hole. By attaching the motor 10 to the base plate 21 in this way, the attachment position of the motor 10 can be adjusted in the long axis direction of the long hole, so that the tension of the belt 33 can be adjusted when the fan unit 20 is assembled. Become. Further, for example, the motor 10 may be slidably attached to the base plate 21 and the motor 10 may be biased (supported) with a spring or the like in a direction in which the belt 33 is tensioned. By attaching the motor 10 to the base plate 21 in this way, the motor 10 can also have a function as an auto tensioner.

  The base plate 21 constitutes a part of the casing 1 and has a substantially rectangular parallelepiped shape similar to the air path formed by the rear casing 1a, the front casing 1c, and the side casing 1d. Two through holes corresponding to the number of fans 4 are formed in the base plate 21, and a bell mouth 22 is attached to each of the two through holes as an integral molding or separately. The base plate 21 is disposed on the rear casing 1a, the front casing 1c, and the side casing 1d so as to close the air passage formed by the rear casing 1a, the front casing 1c, and the side casing 1d on the downstream side of the suction port 2. It is attached. In this state, the upper and lower air paths of the base plate 21 communicate with each other with the bell mouth 22.

Further, in a plan view (on a plane perpendicular to the rotation shaft 17 of the motor 10), a bearing mount 23 that rotatably supports the rotation shaft 14 of the fan 4 is provided at a substantially central portion of each bell mouth 22. . Each of the bearing mounts 23 is connected and fixed to the bell mouth 22 by a plurality of rod-shaped fan supports 24, for example. The bearing mount 23 and the fan support 24 are disposed below the fan 4, that is, on the downstream side of the fan 4. Here, the bearing mount 23 and the fan support 24 correspond to the support structure of the present invention.
In the first embodiment, the fan support 24 of each bell mouth 22 is arranged symmetrically with respect to a plane orthogonal to the juxtaposed direction of the bell mouths 22.

  The two fans 4 are each provided with a rotating shaft 14 on a boss 9 located at the center of the fan 4. Each fan 4 is disposed on the inner peripheral surface side of the bell mouth 22 in plan view, and the rotation shaft 14 of each fan 4 is rotatably supported by the bearing mount 23. Further, in the first embodiment, the outer diameter of the boss 9 of the fan 4 is made smaller than the outer diameter of the motor 10 in order to ensure a large ventilation area of the fan 4 portion.

  The motor 10 is disposed at a position that does not overlap the fans 4 in plan view, and is fixed to the base plate 21. Further, the mounting position of the motor 10 on the base plate 21 is a concave portion 25, and the motor 10 is disposed at a position where at least a part of the main body of the motor 10 overlaps the blade height of the fan 4. In other words, the motor 10 is arranged at a position where at least a part of the main body of the motor 10 overlaps the blades of the fan 4 in the arrangement relationship between the motor 10 and the fan 4 in the direction of the rotation axis 17 of the motor 10.

The belt drive mechanism 30 includes a pulley 31 attached to the rotation shaft 14 of each fan 4, a pulley 32 attached to the rotation shaft 17 of the motor 10, and a belt 31 hooked on the pulley 31 and the pulley 32. . That is, the motor 10 is connected to more fans 4 than the motor 10 by the belt drive mechanism 30, and the driving force of the motor 10 is transmitted to the fans 4 by the belt 33.
In the first embodiment, one motor 10 and two fans 4 are connected by one belt 33. However, the motor 10 and each fan 4 are connected by separate belts 33. It is good also as a structure.

  In the first embodiment, the belt 33 of the belt drive mechanism 30 and the fan support 24 overlap each other in plan view. Further, in the first embodiment, the rotating shaft 14 of each fan 4 and the rotating shaft 17 of the motor 10 protrude below the base plate 21, and the pulleys 31 and 32 are attached to the protruding portions of these rotating shafts 14 and 17. It has a configuration that can be. That is, in the first embodiment, the pulley 31 and the belt 33 of the belt drive mechanism 30 are arranged on the downstream side of the bearing mount 23 and the fan support 24. As described above, the fan support 24 is disposed symmetrically with respect to a plane orthogonal to the direction in which the bell mouths 22 are juxtaposed (that is, the direction in which the fans 4 are juxtaposed). In order to superimpose the belt 33 on such a fan support 24 in plan view, in the first embodiment, a triangle formed by connecting three points of the rotating shaft 17 of the motor 10 and the rotating shaft 14 of each fan 4 with a straight line is a motor. The motor 10 and each fan 4 are arranged so as to form an isosceles triangle having 10 rotation shafts 17 as apexes (the opposite vertices of the base).

As described above, in the indoor unit 40 configured as in the first embodiment, one motor 10 is connected to more fans 4 than the motor 10 by the belt drive mechanism 30. The boss 9 of the fan 4 is smaller than the outer diameter of the main body of the motor 10, and the motor 10 is arranged at a position that does not overlap the fan 4 in plan view. Therefore, in the indoor unit 40 according to the first embodiment, even when the outer diameter of the main body of the motor 10 increases, the ventilation area of the fan 4 portion (approximately the outer diameter of the boss 9 of the fan 4 and the fan 4 (≈ It is possible to ensure a larger donut-shaped annular region) sandwiched between the inner diameter of the bell mouth 22) than in the prior art. Therefore, the indoor unit 40 according to the first embodiment can reduce aerodynamic noise at the same air volume, reduce the ventilation speed (dynamic pressure loss), and reduce power consumption.
Furthermore, in the indoor unit 40 according to the first embodiment, the motor 10 is disposed at a position where at least a part of the main body of the motor 10 overlaps the blade height of the fan 4 in a side view. In other words, the motor 10 is arranged at a position where at least a part of the main body of the motor 10 overlaps the blades of the fan 4 in the arrangement relationship between the motor 10 and the fan 4 in the direction of the rotation axis 17 of the motor 10. For this reason, the indoor unit 40 which concerns on this Embodiment 1 can also make compact the dimension (dimension of the rotating shaft 17 direction of the motor 10) of the vertical direction.

Further, in the indoor unit 40 according to the first embodiment, the belt 33 and the fan support 24 are configured to overlap each other in plan view. For this reason, the indoor unit 40 according to the first embodiment can reduce the ventilation resistance, and can suppress a decrease in the performance of the fan 4 (an increase in static pressure, efficiency, and noise at the same air volume).
Furthermore, in the first embodiment, the belt 33 is disposed on the downstream side of the fan support 24. For this reason, the indoor unit 40 according to the first embodiment is exposed to dust, oil, and chemicals that cannot be removed by the air filter 7 because the airflow generated by the fan 4 does not blow directly onto the belt 33. Therefore, it is possible to prevent the material deterioration of the belt 33 and the operation trouble caused by the above. The effect is that the fan support 24 and the belt 33 overlap with each other on the windward side, and the fan support 24 and the belt 33 are not necessarily arranged on the downstream side of the fan 4 as shown in FIG. There is no need to That is, the same effect can be obtained even if the fan support 24 and the belt 33 are arranged on the upstream side of the fan 4.

  Further, in the indoor unit 40 according to the first embodiment, the triangle in which the three points of the rotation shaft 17 of the motor 10 and the rotation shaft 14 of each fan 4 are connected by a straight line is the top of the rotation shaft 17 of the motor 10. The motor 10 and each fan 4 are arranged so as to form an equilateral triangle. Therefore, when the indoor unit 40 according to the first embodiment is arranged so that the belt 33 and the fan support 24 overlap each other in plan view, the fan is symmetrical with respect to a plane orthogonal to the direction in which the fans 4 are juxtaposed. A bell mouth 22 on which a support 24 is arranged can be used. Therefore, the indoor unit 40 according to the first embodiment can share the bell mouth 22.

  Further, by using a fluorine-based rubber for the belt 33 according to the first embodiment, it is possible to improve resistance to oil stains. Furthermore, by using a material of the same quality at the contact portion between the pulleys 31 and 33 and the belt 33, it is possible to prevent the pulleys 31 and 33 or the belt 33 from being extremely reduced.

  In the first embodiment, the case where two fans 4 are connected to one motor 10 by the belt drive mechanism 30 is shown. However, three or more fans 4 are connected to one motor 10 by the belt drive mechanism 30. Even so, the same effect as described above can be obtained. In the first embodiment, the indoor unit 40 provided with only one motor 10 has been described. However, the indoor unit 40 may include a plurality of motors 10 as a matter of course. In this case, if a plurality of fans 4 are connected to each motor 10 by the belt drive mechanism 30, the same effect as described above can be obtained. Further, in the first embodiment, the indoor unit 40 that sucks air from the upper part of the casing 1 and blows it out from the lower part has been described. However, the positions of the inlet 2 and the outlet 3 formed in the casing 1 are arbitrary. For example, even in an indoor unit that sucks air from the lower part of the casing and blows it out from the upper part, the same effect as described above can be obtained.

Embodiment 2. FIG.
In the second embodiment, an example of the arrangement configuration of the fan 4 and the motor 10 connected by the same belt drive mechanism 30 will be described. Note that items not particularly described in the second embodiment are the same as those in the first embodiment, and the same functions and configurations are described using the same reference numerals.

  FIG. 4 is an explanatory diagram for explaining an arrangement example of fans and motors in an indoor unit of an air conditioner according to Embodiment 2 of the present invention. FIG. 4A is a bottom view showing the fan 4, the motor 10, and the belt drive mechanism 30 (pulleys 31, 32, belt 33). FIG. 4B shows the rotating shaft 14 of the fan 4, the pulley 31 attached to the rotating shaft 14, and the rotating shaft 17 of the motor 10 in order to facilitate understanding of the arrangement positions of the fan 4 and the motor 10. Only the pulley 32 attached to the rotary shaft 17 and the belt 33 hooked on the pulleys 31 and 32 are illustrated.

  For example, as shown in FIG. 4, when two fans 4 are connected to one motor 10 by the belt drive mechanism 30, a line segment B (rotating shaft) connecting the rotating shafts 14 of the adjacent fans 4 (that is, the center of the pulley 31). The rotation shaft 17 and the pulley 32 of the motor 10 may be arranged on a straight line that intersects the line segment B perpendicularly and not on the line segment B.

  By disposing the fan 4 and the motor 10 in this way, an empty space existing between the adjacent fans 4 can be used effectively, so that the mountability of the fan 4 and the motor 10 can be improved, and the width of the indoor unit 40 is increased. The space in the direction (space in which the fans 4 are arranged side by side) can be made compact.

  FIG. 5 is an explanatory diagram for explaining another arrangement example of the fan and the motor in the indoor unit of the air conditioner according to Embodiment 2 of the present invention. FIG. 5A is a bottom view showing the fan 4, the motor 10, and the belt drive mechanism 30 (pulleys 31, 32, belt 33). FIG. 5B shows the rotating shaft 14 of the fan 4, the pulley 31 attached to the rotating shaft 14, and the rotating shaft 17 of the motor 10 in order to facilitate understanding of the arrangement positions of the fan 4 and the motor 10. Only the pulley 32 attached to the rotary shaft 17 and the belt 33 hooked on the pulleys 31 and 32 are illustrated.

  For example, as shown in FIGS. 5A and 5B, when two fans 4 are connected to one motor 10 by the belt drive mechanism 30, the motor is placed on a straight line C passing through the rotation shaft 14 of the adjacent fan 4. Ten rotating shafts 17 and pulleys 32 may be arranged. That is, the rotation shaft 14 of the fan 4 and the pulley 31 attached to the rotation shaft 14 and the rotation shaft 17 of the motor 10 and the pulley 32 attached to the rotation shaft 17 are arranged on the same straight line C. Also good.

By arranging the fan 4 and the motor 10 in this way, the space in the depth direction of the indoor unit 40 (the space in the direction perpendicular to the fan 4 juxtaposition direction) can be configured compactly.
In addition, as shown in FIG.5 (c), on the line segment B (The finite length part between the rotating shafts 14 among the straight lines C) which connected the rotating shaft 14 of the adjacent fan 4, the rotating shaft of the motor 10 is shown. Even if the 17 and the pulley 32 are arranged, the same effect can be obtained.

  FIG. 6 is an explanatory diagram for explaining another arrangement example of the fan and the motor in the indoor unit of the air conditioner according to Embodiment 2 of the present invention. 6A is a bottom view showing the fan 4, the motor 10, and the belt drive mechanism 30 (pulleys 31, 32, belt 33). FIG. 6B shows the rotating shaft 14 of the fan 4, the pulley 31 attached to the rotating shaft 14, and the rotating shaft 17 of the motor 10 in order to facilitate understanding of the arrangement positions of the fan 4 and the motor 10. Only the pulley 32 attached to the rotary shaft 17 and the belt 33 hooked on the pulleys 31 and 32 are illustrated.

  For example, as shown in FIGS. 6 (a) and 6 (b), when three or more fans 4 are connected to one motor 10 by the belt drive mechanism 30, both ends are similar to FIGS. 5 (a) and 5 (b). The rotation shaft 17 and the pulley 32 of the motor 10 and the rotation shaft 14 and the pulley 32 of the fan 4 other than both ends may be arranged on a straight line C passing through the rotation shaft 14 of the fan 4 of the section. That is, on the same straight line C, the rotation shafts 14 of all the fans 4 and the pulleys 31 attached to the rotation shafts 14, and the rotation shafts 17 of the motor 10 and the pulleys 32 attached to the rotation shafts 17 are arranged. May be.

By arranging the fan 4 and the motor 10 in this way, the space in the depth direction of the indoor unit 40 (the space in the direction parallel to the fan 4 juxtaposition direction) is made compact, as in FIGS. 5 (a) and 5 (b). Can be configured.
As shown in FIG. 6C, as in FIG. 5C, a line segment B connecting the rotating shafts 14 of the fans 4 at both ends (of the straight line C, a finite length portion between the rotating shafts 14). Even if the rotation shaft 14 of all the fans 4 and the pulley 31 attached to the rotation shaft 14 and the rotation shaft 17 of the motor 10 and the pulley 32 attached to the rotation shaft 17 are arranged above, The effect of can be obtained.

  FIG. 7 is an explanatory diagram for explaining another arrangement example of the fan and the motor in the indoor unit of the air conditioner according to Embodiment 2 of the present invention. FIG. 7 shows the rotation shaft 14 of the fan 4 and the pulley 31 attached to the rotation shaft 14, the rotation shaft 17 of the motor 10, and the rotation for easy understanding of the arrangement position of the fan 4 and the motor 10. Only the pulley 32 attached to the shaft 17 and the belt 33 hooked on the pulleys 31 and 32 are illustrated.

  For example, as shown in FIG. 7, when three or more fans 4 are connected to one motor 10 by the belt drive mechanism 30, a line segment B connecting the rotation shafts 14 (that is, the centers of the pulleys 31) of the fans 4 at both ends. On the other hand, you may arrange | position the rotating shaft 14 and the pulley 32 of the fan 4 other than both ends. Then, similarly to FIG. 4, the rotating shaft 17 and the pulley 32 of the motor 10 may be arranged on a straight line that intersects the line segment B perpendicularly and not on the line segment B.

  By disposing the fan 4 and the motor 10 in this way, an empty space existing between the adjacent fans 4 can be used effectively, so that the mountability of the fan 4 and the motor 10 can be improved, and the width of the indoor unit 40 is increased. The space in the direction (space in which the fans 4 are arranged side by side) can be made compact.

  FIG. 8 is an explanatory diagram for explaining another arrangement example of the fans and motors in the indoor unit of the air conditioner according to Embodiment 2 of the present invention. FIG. 8A is a bottom view showing the fan 4, the motor 10, and the belt drive mechanism 30 (pulleys 31, 32, belt 33). FIG. 8B shows the rotating shaft 14 of the fan 4, the pulley 31 attached to the rotating shaft 14, and the rotating shaft 17 of the motor 10 in order to facilitate understanding of the arrangement positions of the fan 4 and the motor 10. Only the pulley 32 attached to the rotary shaft 17 and the belt 33 hooked on the pulleys 31 and 32 are illustrated.

  For example, as shown in FIG. 8, when three or more fans 4 are connected to one motor 10 by the belt drive mechanism 30, a line segment B connecting the rotation shafts 14 (that is, the centers of the pulleys 31) of the fans 4 at both ends. On the other hand, the rotating shaft 14 and the pulley 32 of the fan 4 other than both ends may be arranged on a straight line that intersects the line segment B perpendicularly but not on the line segment B. At this time, the rotating shaft 17 and the pulley 32 of the motor 10 may be arranged on the line segment B as shown in FIG. 8 as long as they are on a straight line intersecting with the line segment B. You may arrange | position in the position which is not on the line segment B, as shown in FIG.10 (h).

  When three or more fans 4 are connected to one motor 10 by the belt drive mechanism 30, the fan 4 and the motor 10 are arranged in this way, so that the width of the indoor unit 40 is larger than that shown in FIG. 7. The space in the direction (space in which the fans 4 are arranged in parallel) can be configured more compactly.

  However, as shown in FIGS. 8 to 10, when the rotation shaft 14 and the pulley 32 of the fan 4 other than both ends are arranged on a straight line that intersects the line segment B perpendicularly but not on the line segment B. If the rotating shaft 17 and the pulley 32 of the motor 10 are not arranged on a straight line intersecting with the line segment B, the effects shown in the first embodiment are not necessarily obtained. Even if the rotating shaft 17 and the pulley 32 of the motor 10 are arranged at positions other than the straight line intersecting with the line segment B as shown in FIG. An effect can be obtained.

  Although not particularly mentioned in the second embodiment, it is needless to say that a general technique for driving the belt, such as arranging an idler for adjusting the winding angle of the belt 33 or a tensioner for adjusting the tension, can be appropriately employed. Yes.

Embodiment 3 FIG.
When the belt 33 and the fan support 24 overlap each other in plan view, the fan support may be configured as follows. Note that items not specifically described in the third embodiment are the same as those in the first or second embodiment, and the same functions and configurations are described using the same reference numerals.

FIG. 12 is a bottom view showing a fan unit of an indoor unit of an air conditioner according to Embodiment 3 of the present invention. FIG. 13 is a cross-sectional view taken along the line AA in FIG.
A part of the fan support 24 according to the third embodiment is configured in a hollow semi-open structure (a structure in which the inside is hollow and a part of the outer peripheral part is opened) as shown in FIG. 33 is arranged. That is, a part of the fan support 24 according to the third embodiment functions as the belt cover 18.

  Thus, by using a part of the fan support 24 as the belt cover 18, the space in which the fan support 24 and the belt 33 are disposed can be made compact. Further, for example, as shown in FIG. 14, the opening portion of the belt cover 18 is closed with a lid-like member 18a, whereby the strength of the fan support 24 is improved and the belt 33 is exposed to dust, oil and chemical substances. Can be further suppressed. In addition, an effect of insulating noise generated when the belt 33 is engaged with the pulleys 31 and 32 can be obtained.

  As described above, in the first to third embodiments, the configuration of the air conditioner including the indoor unit 40, that is, the connection configuration between the indoor unit 40 and the outdoor unit is not particularly mentioned. The present invention is not limited by the connection configuration between the outdoor unit and the outdoor unit. The indoor unit 40 may be used as an air conditioner in which one indoor unit 40 is connected to one outdoor unit, or an air conditioner in which a plurality of indoor units 40 are connected to one outdoor unit. You may use said indoor unit 40 for a machine. That is, the effects shown in the first to third embodiments can be obtained by adopting the indoor unit 40 shown in the first to third embodiments in various known air conditioners.

  1 casing, 1a rear casing, 1b upper casing, 1c front casing, 1d side casing, 2 inlet, 3 outlet, 4 fan, 5 heat exchanger, 6 finger guard, 7 air filter, 9 boss, 10 motor, 14 Rotating shaft (fan), 17 Rotating shaft (motor), 18 Belt cover, 18a Lid member, 20 Fan unit, 21 Base plate, 22 Bell mouth, 23 Bearing mount, 24 Fan support, 25 Recess, 30 Belt drive mechanism, 31 pulley, 32 pulley, 33 belt, 40 indoor unit, B line segment, C straight line.

Claims (9)

A casing in which an inlet and an outlet are formed;
A plurality of axial flow type or mixed flow type fans provided on the downstream side of the suction port in the casing;
At least one fan driving motor for driving the plurality of fans;
A heat exchanger that is provided on the downstream side of the fan in the casing and upstream of the outlet, and exchanges heat between the air blown out of the fan and the refrigerant;
With
The fan driving motor is connected to more fans than the fan driving motor by a belt drive mechanism having a belt that transmits the driving force of the fan driving motor to the fan.
The fan driving motor and the fan connected by the belt drive mechanism are:
The outer diameter of the fan boss is smaller than the outer diameter of the fan driving motor body,
In the plane orthogonal to the rotation axis of the fan driving motor, the fan driving motor is disposed at a position not overlapping the fan,
In the arrangement relationship between the fan driving motor and the fan in the rotation axis direction of the fan driving motor, at least a part of the main body of the fan driving motor is arranged at a position overlapping the fan blades. An air conditioner indoor unit. The fan drive motor connected by the belt drive mechanism and the rotation axis of the fan are:
The indoor unit of an air conditioner according to claim 1, wherein the indoor unit is arranged on the same straight line in a plane orthogonal to the rotation axis of the fan driving motor. In a plane orthogonal to the rotation axis of the fan drive motor,
The rotational axes of all the fans connected by the belt drive mechanism are arranged on a line segment connecting the rotational axes of the fans at both ends,
2. The rotating shaft of the fan driving motor connected by the belt drive mechanism is arranged on a straight line that intersects perpendicularly with the line segment but not on the line segment. The indoor unit of the air conditioner described in 1. Three or more fans are connected to the fan drive motor by the belt drive mechanism,
In a plane orthogonal to the rotation axis of the fan drive motor,
Among the fans connected by the belt drive mechanism, the rotation axes of the fans other than the fans arranged at both ends are on a straight line that intersects perpendicularly with a line segment connecting the rotation axes of the fans at both ends. And located at a position not on the line segment,
The indoor unit of an air conditioner according to claim 1, wherein a rotation shaft of the fan driving motor connected by the belt drive mechanism is arranged on a straight line that intersects perpendicularly with the line segment. A support structure for supporting the rotating shaft of the fan;
5. The belt according to claim 1, wherein the belt of the belt drive mechanism is disposed at a position overlapping the support structure on a plane orthogonal to a rotation axis of the fan driving motor. The indoor unit of the air conditioner described in the paragraph. At least a part of the support structure has a hollow structure,
The indoor unit of an air conditioner according to claim 5, wherein the belt of the belt drive mechanism is arranged inside the support structure having a hollow structure.   The indoor unit of an air conditioner according to claim 5 or 6, wherein the belt is disposed on the downstream side of the support structure. A plurality of bell mouths provided with the fan on the inner peripheral surface side,
The support structure is provided on the bell mouth,
The number of the fans connected to one fan driving motor by the belt drive mechanism is two,
The one fan driving motor and the two fans have a triangle in which the rotation axes of the one fan driving motor and the two fans are connected in a straight line with the rotation axis of the fan driving motor as a vertex. Placed in an isosceles triangle,
The said support structure is arrange | positioned symmetrically with respect to the plane orthogonal to the juxtaposition direction of the two said fans connected by the same said belt drive mechanism. An indoor unit for an air conditioner according to claim 1.   The air conditioner provided with the indoor unit as described in any one of Claims 1-8.

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