JP2015014432A - Indoor equipment of air conditioner and air conditioner having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide indoor equipment of an air conditioner capable of depressing enlargement in size of the indoor equipment and the blast area of a fan part can be largely ensured compared with a conventional one even when the motor outer diameter becomes larger.SOLUTION: A fan drive motor 10 of indoor equipment 40 is connected to two fans 4 with a belt drive device 30, and the outer diameter of a boss 9 of the fan 4 is smaller than that of the body of the motor 10. The motor 10 is arranged at a position not overlapped with the fan 4 on a flat surface which is orthogonal to a revolving shaft 17 of the motor 10. In the arrangement relation between the motor 10 and the fan 4 in an axial direction of the revolving shaft 17, at least a part of the body of the motor 10 is arranged at a position overlapped with blades of the fan 4. The indoor equipment 40 further includes an air ion generator 60 for depressing electrification of the belt drive device 30, and the air ion generator 60 is arranged at a position not overlapped with the fan 4 on the flat surface which is orthogonal to the revolving shaft 17.

Description

  The present invention relates to an indoor unit of an air conditioner 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.

International Publication No. 2010/089920 Japanese Utility Model Publication No. 1-3937

  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, an 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 in plan view. 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, in an air conditioner having an axial flow type or mixed flow type fan as in Patent Document 1, the outer diameter of the fan drive motor becomes large, and it becomes difficult to expand the ventilation area of the fan portion. There was a problem that it was difficult to improve the 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. The fan drive motor and the fan are arranged in a rotational axis direction such that at least a part of the main body of the fan drive motor is disposed at a position overlapping the fan blades, and the fan drive motor In the plane orthogonal to the rotation axis of the fan, the fan driving motor is disposed at a position that does not overlap with an imaginary straight line connecting the rotation axes of the adjacent fans, and air ions that suppress charging of the belt drive mechanism. And an air ion generator for generating the fan driving motor. And it is characterized in that it is arranged in a plane perpendicular to the rotational axis of the over to a position that does not overlap with the fan.

  The air conditioner according to the present invention includes the indoor unit of the air conditioner according to the present 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 a figure which expands and shows a part of belt drive mechanism in 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 concerning Embodiment 2 of this invention. It is a figure which expands and shows a part of fan unit shown in FIG. It is a bottom view which shows the modification of the fan unit of the indoor unit of the air conditioner concerning Embodiment 2 of this invention. It is a figure which expands and shows a part of fan unit shown in FIG. 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 a figure which expands and shows a part of fan unit shown in FIG. It is a figure which shows the structure of the indoor unit of the air conditioner which concerns on Embodiment 4 of this invention. It is an external view which shows the structure of the remote control of the air conditioner which concerns on Embodiment 4 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 the first embodiment. 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. Moreover, the indoor unit 40 comprises an air conditioner with an outdoor unit. 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 (for example, ceiling surface) 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 base plate 21 constitutes a part of the casing 1, and the plurality of fans 4, the motor 10, and the belt drive mechanism 30 are attached to the base plate 21. The base plate 21 is provided on the upstream side of the heat exchanger 5 in the air path in the casing 1 formed by the rear casing 1a, the front casing 1c, and the side casing 1d. The base plate 21 is a substantially rectangular parallelepiped (plate) member having a planar shape similar to the cross section of the air passage. 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. 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. The bearing mount 23 and the fan support 24 function as a support structure that supports the rotating shaft 14 of the fan 4. In the first embodiment, the fan support 24 is arranged symmetrically with respect to a plane orthogonal to the direction in which the bell mouths 22 are arranged side by side.

  The two fans 4 have 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, in the first embodiment, in order to effectively use the empty space existing between the adjacent fans 4, the motor 10 includes a virtual straight line 14 a that connects the rotating shafts 14 of the adjacent fans 4 in plan view. It is arranged in a position that does not overlap. 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.

  FIG. 4 is an enlarged view of a part of the belt drive mechanism 30 (near the toothed pulley 32). As shown in FIG. 4 and FIG. 3 already shown, the belt drive mechanism 30 includes a toothed pulley 31 attached to the rotating shaft 14 of each fan 4 and a toothed pulley 32 attached to the rotating shaft 17 of the motor 10. A toothed pulley 31 and an endless toothed belt 33 hooked on the toothed pulley 32. That is, the motor 10 is connected to more fans 4 and belt drive mechanisms 30 than the motor 10 itself. The driving force of the motor 10 is transmitted to these fans 4 by the toothed belt 33. In the first embodiment, one motor 10 and two fans 4 are connected by one toothed belt 33. However, the motor 10 and each fan 4 are connected to separate toothed belts. It is good also as a structure connected by 33. FIG.

  In the first embodiment, the toothed 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 rotation shaft 14 of each fan 4 and the rotation shaft 17 of the motor 10 protrude below the base plate 21 (bottom side), and the toothed pulleys 31 and 32 are connected to the rotation shaft 14, It is the structure attached to 17 protrusion parts. That is, in the first embodiment, the toothed pulley 31 and the toothed belt 33 of the belt drive mechanism 30 are arranged on the downstream side of the fan 4, 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 the first embodiment, in order to overlap the toothed belt 33 on the fan support 24 in a plan view, in the first embodiment, three points of the rotating shaft 17 of the motor 10 and the rotating shaft 14 of each fan 4 are connected by a virtual straight line. However, the motor 10 and each fan 4 are arranged so as to form an isosceles triangle having the rotation axis 17 of the motor 10 as an apex (a pair of apexes of the base).

  Since the indoor unit 40 takes in indoor air from the air inlet 2, it also takes in fine particles, dust, oil, etc. in the air (hereinafter, the fine particles, dust, oil, etc. may be collectively referred to as “foreign matter”) at the same time. It becomes. Most of these foreign substances are removed by the air filter 7 and do not enter the interior of the indoor unit 40, but some fine foreign substances pass through the air filter 7 and enter the interior of the indoor unit 40. On the other hand, when the motor 10 is rotating, the toothed belt 33 and the toothed pulleys 31 and 32 are charged to repeat contact and separation (peeling) from each other. When the toothed belt 33 and the toothed pulleys 31 and 32 are charged, foreign matter easily adheres to the toothed belt 33 and the toothed pulleys 31 and 32. When the fan 4 rotates in a state in which foreign matter adheres to the toothed belt 33 and the toothed pulleys 31 and 32, when the toothed belt 33 meshes with the toothed pulleys 31 and 32, the toothed belt 33 or the toothed pulleys 31 and 32. The foreign matter adhering to the tooth surface is pressed against the tooth surface of the toothed belt 33 by the toothed pulleys 31 and 32 and bites into the tooth surface. The foreign matter that bites into the tooth surface of the toothed belt 33 damages the toothed belt 33 and the toothed pulleys 31 and 32 at the same time, and promotes wear of both. Thereby, the lifetime of the toothed belt 33 and the toothed pulleys 31 and 32 will be shortened.

  In the first embodiment, an air ion generator 60 that generates air ions that suppress charging of the belt drive mechanism 30 (the toothed belt 33 and the toothed pulleys 31 and 32) is installed on the base plate 21. The air ion generator 60 is attached to the bottom surface side of the base plate 21 where the belt drive mechanism 30 is provided. That is, the air ion generator 60 is disposed on the downstream side of each fan 4 and on the upstream side of the heat exchanger 5. The air ion generator 60 is disposed inside a triangle in which three points of the rotation shaft 17 of the motor 10 and the rotation shaft 14 of each fan 4 are connected by a virtual straight line. Inside the air ion generator 60, a needle-like electrode is provided. When a voltage is applied to the electrode, corona discharge occurs at the tip of the electrode. This corona discharge generates air ions at the tip of the electrode. Here, the power supply to be applied to the electrode is a high voltage of about 5 kV, and the pulse voltage to be applied intermittently prevents the negative charge of oxygen from changing to ozone. Air ions drift around the tip of the electrode and are radiated (diffused) by the fan 4 to the entire fan unit 20. As a result, the toothed belt 33 and the toothed pulleys 31 and 32 are neutralized so as not to be charged. In the first embodiment, the air ion generator 60 is installed inside a triangle in which three points of the rotation shaft 17 of the motor 10 and the rotation shaft 14 of each fan 4 are connected by a virtual straight line. If it can be installed downstream of the fan 4 and upstream of the heat exchanger 5 in the air passage without reducing the size of the air passage, this is not the case.

  In general, rubber or urethane is used as the material of the toothed belt 33, and metal is used as the material of the toothed pulleys 31 and 32. In the present embodiment, the base plate 21 of the fan unit 20 is formed of a material that is more easily charged than the material of the toothed belt 33, and the charging potential of the base plate 21 is generated when the toothed belt 33 rotates. Than ever to be higher. Thereby, charging of the toothed belt 33 can be prevented. Examples of substances that are more easily charged than the material of the toothed belt 33 (rubber, urethane, etc.) include vinyl, silicon, and Teflon (registered trademark) (polytetrafluoroethylene). The same effect can be obtained by forming a surface coating of these substances on the base plate 21.

  Further, the toothed belt 33, the toothed pulleys 31 and 32, and the base plate 21 may be grounded by imparting conductivity to each other so as not to be charged. For example, at least the toothed belt 33 and the toothed pulleys 31 and 32 are electrically conductive and grounded. Thereby, it is possible to prevent the toothed belt 33 and the toothed pulleys 31 and 32 from being charged. In order to impart conductivity to the toothed belt 33, there are methods such as blending conductive particles into the material of the toothed belt 33, or performing a conductive coating treatment on the toothed belt 33. In the case of a conductive coating treatment, it is desirable to use a multilayer coating or a thick film in order to avoid exposing the base material when the coating is worn.

  As foreign substances that shorten the life of the toothed belt 33, there are wear particles generated by sliding between the toothed belt 33 and the toothed pulleys 31 and 32, for example, in addition to fine particles and dust contained in the air. In order to suppress the generation of wear particles, the material of the toothed pulleys 31 and 32 can be hardened to give an antiwear effect, and the wear resistance can be improved with respect to the material of the toothed pulleys 31 and 32. It is desirable to perform surface treatment. As a surface treatment for the material of the toothed pulleys 31 and 32, in the case of the toothed pulleys 31 and 32 whose base material is aluminum (for example, the material of the toothed pulleys 31 and 32 is an alloy casting whose base material is aluminum. ), There are anodized treatment and hard anodized treatment as the anodized film, and electroless nickel plating as the plating treatment. A fluorine coating, molybdenum disulfide coating, or the like may be applied on the alumite treatment. In the case of toothed pulleys 31 and 32 using iron as a base material (for example, when the material of toothed pulleys 31 and 32 is an alloy casting using iron as a base material), electroless nickel plating, chrome plating, There are flash, hard chrome plating, chromate treatment, etc., chemical conversion treatment includes manganese phosphate coating, zinc phosphate coating, etc., and heat treatment includes salt bath soft nitriding, gas soft nitriding, quenching and the like. In any case, it is possible to obtain the effect of preventing wear on the surfaces of the toothed pulleys 31 and 32 and the effect of preventing generation of wear particles.

  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 (≈ The area of the doughnut-shaped annular region sandwiched between the inner diameter of the bell mouth 22) can be secured larger 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 motor 10 is arranged at a position that does not overlap with the virtual straight line 14a connecting the rotation shafts 14 of the adjacent fans 4 in plan view. For this reason, since the indoor unit 40 according to the first embodiment can effectively use the empty space existing between the adjacent fans 4, the mountability of the fan 4 and the motor 10 can be improved. The width in the direction in which the fans 4 are juxtaposed (for example, the width in the left-right direction) can be made compact.

  Further, in the indoor unit 40 according to the first embodiment, the toothed 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 toothed belt 33 is disposed on the downstream side of the fan support 24. For this reason, in the indoor unit 40 according to the first embodiment, the airflow generated by the fan 4 is not directly blown onto the toothed belt 33, so that dust, oil, and chemical substances that cannot be completely removed by the air filter 7 are collected. It is possible to prevent the material deterioration of the toothed belt 33 due to the exposure and operational troubles.

  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 virtual straight line is the vertex of the rotation shaft 17 of the motor 10. The motor 10 and each fan 4 are arranged so as to form an isosceles triangle. For this reason, the indoor unit 40 according to the first embodiment is symmetrical with respect to a plane orthogonal to the direction in which the fans 4 are juxtaposed when the toothed belt 33 and the fan support 24 are arranged so as to overlap each other in plan view. A bell mouth 22 in which a fan support 24 is disposed can be used. Therefore, the indoor unit 40 according to the first embodiment can share the bell mouth 22.

  In the indoor unit 40 according to the first embodiment, the belt drive mechanism 30 includes a toothed belt 33 and toothed pulleys 31 and 32. Since the toothed belt 33 has high transmission efficiency unlike a friction transmission belt such as a V-belt or a flat belt, it can ensure the same performance as a conventional motor direct connection system that does not use a belt. For example, in a heat exchanger unit of a refrigerator described in Patent Document 2, a friction transmission belt is used as a belt used in a drive system. The friction transmission belt is installed in a V groove of a drive pulley and a V groove of a driven pulley. When such a belt is used, there is a problem in that power transmission efficiency is low because the belt and the pulley always rotate while slipping slightly. On the other hand, in the first embodiment, since the toothed belt 33 and the toothed pulleys 31 and 32 are used, power transmission by meshing transmission is possible. In meshing transmission, driving loss occurs due to internal heat generation due to bending and sliding due to meshing. However, since the driving loss is very small, power transmission efficiency can be improved as compared to using a frictional power transmission belt such as a V belt. Furthermore, the use of the toothed belt 33 and the toothed pulleys 31 and 32 makes it possible to completely match the rotational speed of the motor and the rotational speeds of the plurality of fans, thereby preventing the occurrence of interference noise.

  In the indoor unit 40 according to the first embodiment, the belt drive mechanism 30 is charged at a position downstream of the fan 4 and upstream of the heat exchanger 5 and not overlapping the fan 4 in plan view. An air ion generator 60 that generates air ions to be suppressed is installed. As a result, the toothed belt 33 and the toothed pulleys 31 and 32 are neutralized so as not to be charged. Therefore, it is difficult for foreign matter to adhere to the toothed belt 33 and the toothed pulleys 31 and 32. Wear of the attached pulleys 31 and 32 can be suppressed. Further, by increasing the hardness of the toothed pulleys 31 and 32, it is possible to provide an anti-wear effect and to prevent generation of wear particles.

  Further, in the indoor unit 40 according to the first embodiment, at least the surface of the base plate 21 of the fan unit 20 is formed of a material that is more easily charged than the material of the toothed belt 33, and the charged potential of the base plate 21. Is always higher than the charging potential generated when the toothed belt 33 rotates. For example, the toothed belt 33 is made of rubber or urethane, and at least the surface of the base plate 21 is made of vinyl, silicon, or Teflon (registered trademark) that is more easily charged than rubber and urethane. Thereby, since the charging of the toothed belt 33 can be prevented, it is difficult for foreign matter to adhere to the toothed belt 33, and wear of the toothed belt 33 and the toothed pulleys 31, 32 can be suppressed.

  Further, in the indoor unit 40 according to the first embodiment, the toothed belt 33 and the toothed pulleys 31 and 32 have conductivity and are grounded. As a result, the toothed belt 33 and the toothed pulleys 31 and 32 can be prevented from being charged, so that foreign matters are less likely to adhere to the toothed belt 33 and the toothed pulleys 31 and 32. The wear of 31 and 32 can be suppressed.

  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.
An air conditioner according to Embodiment 2 of the present invention will be described. FIG. 5 is a bottom view showing the fan unit 20 of the indoor unit 40 of the air conditioner according to the present embodiment. 6 is an enlarged view showing a part of the fan unit 20 shown in FIG. 5 (in the vicinity of the belt cleaning mechanism 61). In addition, about the component which has the function and effect | action same as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIGS. 5 and 6, the fan unit 20 of the present embodiment is provided with a belt cleaning mechanism 61 that cleans the toothed belt 33. The belt cleaning mechanism 61 has a foreign matter removing brush 71. The belt cleaning mechanism 61 can press the foreign material removing brush 71 against the toothed belt 33 from the inside of a triangle in which three points of the rotating shaft 17 of the motor 10 and the rotating shaft 14 of each fan 4 are connected by a virtual straight line. It has a structure. That is, the foreign matter removing brush 71 is pressed to the contact surface (inner peripheral surface) side of the toothed belt 33 with the toothed pulley 32. The foreign matter removing brush 71 is provided inside the toothed belt 33 in a plan view, and is attached rotatably about a support shaft 73. The foreign matter removing brush 71 is driven by a drive mechanism (not shown), and a first position (see FIG. 6A) in contact with the toothed belt 33 and a first position away from the toothed belt 33. 2 positions (see FIG. 6B) can be taken at least. Here, the traveling direction of the toothed belt 33 is a direction from the lower right to the upper left in FIGS. 6 (a) and 6 (b).

  When performing belt cleaning, as shown in FIG. 6A, the foreign matter removing brush 71 is driven to the first position in the clockwise direction around the support shaft 73. Thereby, the foreign matter removing brush 71 is pressed against the toothed belt 33 and removes the foreign matter attached to the toothed belt 33. A dust box 75 is provided below the foreign matter removing brush 71, and the foreign matter removed by the foreign matter removing brush 71 is captured in the dust box 75.

  When the belt cleaning is finished, the foreign matter removing brush 71 is driven counterclockwise about the support shaft 73 to the second position as shown in FIG. Thereby, the foreign matter removing brush 71 is separated from the toothed belt 33.

  FIG. 7 is a bottom view showing a modified example of the fan unit 20. FIG. 8 is an enlarged view showing a part of the fan unit 20 shown in FIG. 7 (in the vicinity of the belt cleaning mechanism 61). The belt cleaning mechanism 61 of this modification has a foreign matter removing pulley 70. The belt cleaning mechanism 61 can press the foreign matter removing pulley 70 against the toothed belt 33 from the inside of a triangle in which three points of the rotating shaft 17 of the motor 10 and the rotating shaft 14 of each fan 4 are connected by a virtual straight line. It has a structure. That is, the foreign matter removing pulley 70 is pressed against the contact surface side of the toothed belt 33 with the toothed pulley 32. On the outer peripheral surface of the foreign matter removing pulley 70, a foreign matter removing brush 71 for removing foreign matter adhering to the toothed belt 33 is provided over the entire circumference, for example. The foreign matter removing pulley 70 is provided inside the toothed belt 33 in plan view, and is supported by the support rod 72 so as to be rotatable about the rotation shaft 70a. The support bar 72 is rotatably attached to the support shaft 73. The foreign matter removing pulley 70 is driven by a driving mechanism (not shown) via a support rod 72, and is in a first position where it comes into contact with the toothed belt 33 (see FIG. 8 (a)) and with a tooth. The second position (see FIG. 8B) away from the belt 33 can be taken at least. Further, the belt cleaning mechanism 61 contacts the foreign matter removing brush 71, and captures the foreign matter removed by the brush 74 and another brush 74 that removes the foreign matter entangled by the foreign matter removing brush 71 from the foreign matter removing brush 71. And a dust box 75. The brush 74 and the dust box 75 are fixed to the support bar 72. Here, the traveling direction of the toothed belt 33 is a direction from the lower right to the upper left in FIGS. 8A and 8B.

  When performing belt cleaning, the foreign matter removing pulley 70 is driven to the first position in the counterclockwise direction around the support shaft 73 as shown in FIG. As a result, the foreign matter removing pulley 70 is pressed against the toothed belt 33 and is rotated by the driving force of the toothed belt 33, and the foreign matter removing brush 71 entangles the foreign matter attached to the toothed belt 33. The foreign matter entangled by the foreign matter removing brush 71 is peeled off from the foreign matter removing brush 71 by the brush 74 and captured by the dust box 75.

  When the belt cleaning is finished, the foreign matter removing pulley 70 is driven clockwise around the support shaft 73 to the second position, as shown in FIG. 8B. As a result, the foreign matter removing pulley 70 is separated from the toothed belt 33.

  5-8, the belt cleaning is performed either during the defrosting operation of the indoor unit 40, when the rotation speed immediately after the start of the heating operation is 1200 rpm or more, or when cleaning the air filter. It is desirable to be. The reason is that during the defrosting operation of the indoor unit 40, when the rotation speed immediately after the start of the heating operation is 1200 rpm or more, and when cleaning the air filter 7, the operation sound of the indoor unit 40 is larger than that during normal operation, This is because the contact sound between the toothed belt 33 and the foreign matter removing brush 71 during belt cleaning is inconspicuous. Further, during the defrosting operation of the indoor unit 40, when the rotation speed immediately after the start of the heating operation is 1200 rpm or more, the internal temperature of the indoor unit 40 increases and the toothed belt 33 is softened. Since the contact sound between the toothed belt 33 and the foreign matter removing brush 71 is reduced as the toothed belt 33 is softer, the effect of reducing the contact sound is also obtained.

  In the second embodiment, the fan unit 20 including the two fans 4 has been described. However, if the indoor unit is an air conditioner that includes one or more fans and includes the belt drive mechanism 30, the present embodiment will be described. By applying the second embodiment, the same effect can be obtained.

  Moreover, it is desirable to install the belt cleaning mechanism 61 at a position where the ventilation area is not reduced.

  As described above, in the indoor unit 40 of the second embodiment, the belt cleaning mechanism 61 that cleans the toothed belt 33 is provided. For example, the belt cleaning mechanism 61 includes a foreign matter removing brush 71 that removes foreign matter attached to the contact surface side of the toothed belt 33 with the toothed pulley 32, and a dust box 75 that captures the removed foreign matter. The foreign matter removing brush 71 can take at least a first position in contact with the toothed belt 33 and a second position away from the toothed belt 33. Further, for example, in the belt cleaning mechanism 61, the foreign matter removing brush 71 that entangles foreign matter attached to the toothed belt 33 contacts the foreign matter removing pulley 70 provided on the outer peripheral surface and the foreign matter removing brush 71, and the foreign matter removing brush 71. There are another brush 74 that removes the entangled foreign matter from the foreign matter removing brush 71 and a dust box 75 that captures the removed foreign matter. The foreign matter removing pulley 70 can take at least a first position in contact with the toothed belt 33 and a second position away from the toothed belt 33.

  Thereby, since the foreign matter adhering to the contact surface side of the toothed belt 33 with the toothed pulley 32 can be removed by the belt cleaning mechanism 61, wear of the toothed belt 33 and the toothed pulley 32 can be suppressed and air can be suppressed. Longer life of the harmonic machine can be realized.

Embodiment 3 FIG.
An air conditioner according to Embodiment 3 of the present invention will be described. FIG. 9 is a bottom view showing the fan unit 20 of the indoor unit 40 of the air conditioner according to the present embodiment. FIG. 10 is an enlarged view showing a part of the fan unit 20 shown in FIG. 9 (in the vicinity of the capacitance sensor 80). In addition, about the component which has the function and effect | action same as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIGS. 9 and 10, the fan unit 20 of the present embodiment is provided with a capacitance sensor 80. The electrostatic capacity sensor 80 is installed toward the toothed belt 33 from the inside of a triangle in which three points of the rotating shaft 17 of the motor 10 and the rotating shaft 14 of each fan 4 are connected by a virtual straight line. On the axis of the capacitance sensor 80, an auxiliary electrode 81 is provided with the toothed belt 33 sandwiched between the capacitance sensor 80. The capacitance C between the capacitance sensor 80 and the auxiliary electrode 81 is expressed by the formula (1). Here, a is the distance from the capacitance sensor 80 to the surface of the toothed belt 33, b is the distance from the auxiliary electrode 81 to the surface of the toothed belt 33, c is the thickness of the toothed belt 33, and S is the capacitance sensor. The surface area of 80, ε0 is the dielectric constant of vacuum, εair is the relative dielectric constant of air, and εS is the relative dielectric constant of the toothed belt 33.

  When the toothed belt 33 is worn, the thickness c decreases and the distance a + b increases (a + b + c is constant). Therefore, the thickness c of the toothed belt 33 can be read based on the change in the electrostatic capacitance C, and thereby the wear of the toothed belt 33 can be estimated. In the third embodiment, the capacitance sensor 80 is installed on the surface side of the toothed belt 33 that contacts the toothed pulley 32 (inside the toothed belt 33 in plan view), and the auxiliary electrode 81 is provided. The toothed pulley 33 of the toothed belt 33 is attached to the surface side where the toothed pulley 32 does not contact (outside of the toothed belt 33 in plan view), but on the contrary, it does not contact the toothed pulley 32 of the toothed belt 33. A capacitance sensor 80 may be attached to the surface side.

  As described above, in the indoor unit 40 of the third embodiment, the electrostatic capacitance sensor 80 installed toward the toothed belt 33 and the toothed belt 33 sandwiched between the electrostatic capacitance sensor 80 are installed. The auxiliary electrode 81 is provided. Thereby, it is possible to estimate the wear of the toothed belt 33 and determine the life of the toothed belt 33.

  Instead of the capacitance sensor 80 and the auxiliary electrode 81, the thickness of the toothed belt 33 may be measured by an ultrasonic thickness meter or the like. Further, instead of the capacitance sensor 80 and the auxiliary electrode 81, two displacement sensors may be arranged perpendicular to the toothed belt 33 so as to sandwich the toothed belt 33 therebetween. By measuring the distance from the two displacement sensors attached at fixed positions to the toothed belt 33, the thickness of the toothed belt 33 and the amplitude of the toothed belt 33 can be calculated. The signal obtained from the displacement sensor is processed by, for example, fast Fourier transform (FFT), and periodic vibration corresponding to tooth skipping can be detected to determine the life of the toothed belt 33.

Embodiment 4 FIG.
An air conditioner according to Embodiment 4 of the present invention will be described. The present embodiment is characterized by comprising information notifying means for notifying the user of information relating to the travel distance of the toothed belt 33 (for example, the travel distance of the toothed belt 33, the replacement timing of the toothed belt 33, etc.). It is what. Fig.11 (a) is an external view which shows the structure of the indoor unit 40 of the air conditioner which concerns on this Embodiment. FIG.11 (b) is a figure which expands and shows a part (in the vicinity of the display part 82a) of the indoor unit 40 shown to Fig.11 (a). In addition, about the component which has the function and effect | action same as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 11, the indoor unit 40 includes a display unit 82a (user interface unit) on the front surface. The display unit 82a includes a notification lamp 83 (guidance possible display) and the like as a part of the information notification unit. The notification lamp 83 is lit when there is information that the user does not know (not notice) (for example, information on the replacement timing of the toothed belt 33). The notification lamp 83 notifies the user of the presence of information and prompts the user to operate a notification button 85 of the remote controller 84 described later.

  FIG. 12 is an external view showing a configuration of a remote controller 84 (remote control device) of the air conditioner according to the present embodiment. The remote controller 84 is placed at the user's hand to remotely control the air conditioner. The remote controller 84 can display character information as a notification button 85 (information request button) as a part of the information notification means, in addition to buttons for normal driving operation (on / off), temperature setting operation, and the like. A simple guidance display unit 86 is provided. Information exchange between the indoor unit 40 and the remote controller 84 may be performed by bidirectional infrared communication or wireless communication.

  The user notices the lighting of the notification lamp 83 on the display unit 82a of the indoor unit 40, and presses the notification button 85 provided on the remote controller 84 to thereby display detailed information on the guidance display unit 86 (for example, “Before belt replacement time. Character information) can be displayed. As a result, it is possible to notify the user of information on the replacement timing of the toothed belt 33 that the user does not know, so it is possible to replace parts before failure, and protect the peripheral parts and extend the life of the air conditioner. be able to.

  As the information notification means, the remote control 84 or the indoor unit 40 may be provided with a sound output function for outputting sound, and detailed information may be notified to the user by sound. Thus, even when the user is unaware of the display on the guidance display unit 86 of the remote controller 84, the user can be surely notified of the information by notifying the detailed information by voice. The information notification by voice may be performed together with the information display on the guidance display unit 86, or may be performed instead of the information display on the guidance display unit 86.

Hereinafter, the lighting conditions of the notification lamp 83 on the indoor unit 40 side will be described.
The indoor unit 40 includes a sensor (an example of a travel distance calculation unit) that can calculate the travel distance of the toothed belt 33. The control unit of the indoor unit 40 acquires information on the travel distance of the toothed belt 33 (for example, the cumulative travel distance since the toothed belt 33 was replaced last time) based on the information from the sensor. When the travel distance of the toothed belt 33 reaches a preset life travel distance, it is determined that it is time to replace the toothed belt 33 and the notification lamp 83 is turned on.

Next, conditions for turning off the notification lamp 83 will be described. There are two conditions for turning off the notification lamp 83, for example.
(1) When the notification button 85 of the remote controller 84 is pressed by the user and the transmission of information from the indoor unit 40 to the remote controller 84 is completed.
(2) When a predetermined time has elapsed since the notification lamp 83 was turned on.

  Hereinafter, an example of display contents of the guidance display unit 86 when the notification button 85 of the remote controller 84 is pressed will be described. In the guidance display section 86, in addition to information on the replacement timing of the toothed belt 33, it is possible to display information about the operation mode or operation status of the air conditioner. For example, when the notification button 85 is pressed while the indoor unit 40 of the air conditioner lights the notification lamp 83, the guidance display unit 86 displays information on the travel distance of the toothed belt 33 or the tooth Information on the replacement time of the attached belt 33 is displayed. When the notification button 85 is pressed when the indoor unit 40 is not lighting the notification lamp 83, the guidance display unit 86 displays information on the travel distance of the toothed belt 33 at that time.

  As described above, in the indoor unit 40 of the fourth embodiment, the travel distance calculating means for calculating the travel distance of the toothed belt 33 and the information notifying means for notifying the user of information related to the travel distance of the toothed belt 33 ( In this example, a notification lamp 83, a guidance display unit 86, a voice output function, and the like are provided. As a result, information such as the replacement time of the toothed belt 33 can be notified to the user, so that parts can be replaced before failure, and the protection of peripheral parts and the extension of the life of the air conditioner can be realized. .

Other embodiments.
The present invention is not limited to the above embodiment, and various modifications can be made.
For example, in the above embodiment, the belt drive mechanism 30 using the toothed belt 33 is taken as an example, but the belt drive mechanism 30 may be a friction transmission belt such as a V belt or a flat belt.

  In addition, the above embodiments and modifications can be implemented in combination with each other. For example, if the first embodiment and the second embodiment are combined, it is possible to prevent the foreign matter from adhering to the toothed belt 33 and the toothed pulleys 31 and 32 by suppressing charging, and to the toothed belt 33. Even when foreign matter has adhered, the foreign matter can be removed by the belt cleaning mechanism 61. For this reason, wear of the toothed belt 33 and the toothed pulleys 31 and 32 can be more reliably suppressed.

  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), 14a Virtual straight line, 17 Rotating shaft (motor), 20 Fan unit, 21 Base plate, 22 Bell mouth, 23 Bearing mount, 24 Fan support, 25 Recess, 30 Belt drive mechanism, 31 Toothed pulley, 32 toothed pulley, 33 toothed belt, 40 indoor unit, 60 air ion generator, 61 belt cleaning mechanism, 70 foreign matter removing pulley, 70a rotating shaft, 71 foreign matter removing brush, 72 support rod, 73 supporting shaft, 74 brush, 75 dust box, 80 capacitance Capacitors, 81 auxiliary electrode, 82a display unit, 83 notifying lamp, 84 remote control, 85 News button, 86 guidance display unit.

Claims (15)

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 direction of the rotation axis 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 blades of the fan,
In a plane orthogonal to the rotation axis of the fan drive motor, the fan drive motor is disposed at a position that does not overlap with an imaginary straight line connecting the rotation axes of the adjacent fans.
An air ion generator for generating air ions that suppress charging of the belt drive mechanism;
The air conditioner indoor unit, wherein the air ion generator is disposed at a position that does not overlap the fan in a plane orthogonal to a rotation axis of the fan driving motor. 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 direction of the rotation axis 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 blades of the fan,
In a plane orthogonal to the rotation axis of the fan drive motor, the fan drive motor is disposed at a position that does not overlap with an imaginary straight line connecting the rotation axes of the adjacent fans.
The indoor unit of an air conditioner, wherein the belt is a toothed belt. 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 direction of the rotation axis 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 blades of the fan,
In a plane orthogonal to the rotation axis of the fan drive motor, the fan drive motor is disposed at a position that does not overlap with an imaginary straight line connecting the rotation axes of the adjacent fans.
Provided on the upstream side of the heat exchanger in the air passage in the casing, and the plurality of fans, the fan driving motor, and the belt drive mechanism are attached, and a plurality of through holes corresponding to the plurality of fans are provided. A base plate provided,
An indoor unit of an air conditioner, wherein at least a surface of the base plate is formed of a material that is more easily charged than the belt. The belt is made of rubber or urethane,
The indoor unit of an air conditioner according to claim 3, wherein the base plate is made of vinyl, silicon, or Teflon (registered trademark). 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 and a pulley 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 direction of the rotation axis 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 blades of the fan,
In a plane orthogonal to the rotation axis of the fan drive motor, the fan drive motor is disposed at a position that does not overlap with an imaginary straight line connecting the rotation axes of the adjacent fans.
The indoor unit of an air conditioner, wherein the belt and the pulley have electrical conductivity and are grounded. 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 direction of the rotation axis 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 blades of the fan,
In a plane orthogonal to the rotation axis of the fan drive motor, the fan drive motor is disposed at a position that does not overlap with an imaginary straight line connecting the rotation axes of the adjacent fans.
An indoor unit for an air conditioner, further comprising a belt cleaning mechanism for cleaning the belt.   The indoor unit of an air conditioner according to claim 6, wherein the belt cleaning mechanism includes a brush that removes foreign matters attached to the belt, and a dust box that captures the removed foreign matters.   The indoor unit of an air conditioner according to claim 7, wherein the brush can take at least a first position in contact with the belt and a second position away from the belt.   The belt cleaning mechanism contacts a brush with a foreign matter removing pulley provided on an outer peripheral surface of a brush that entangles the foreign matter attached to the belt, and removes the foreign matter entangled with the brush from the brush. The indoor unit of the air conditioner according to claim 6, further comprising another brush and a dust box that captures the removed foreign matter.   The indoor unit for an air conditioner according to claim 9, wherein the foreign matter removing pulley can take at least a first position in contact with the belt and a second position away from the belt. 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 direction of the rotation axis 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 blades of the fan,
In a plane orthogonal to the rotation axis of the fan drive motor, the fan drive motor is disposed at a position that does not overlap with an imaginary straight line connecting the rotation axes of the adjacent fans.
An indoor unit of an air conditioner, further comprising: a capacitance sensor installed toward the belt; and an auxiliary electrode installed with the belt sandwiched between the capacitance sensor. 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 direction of the rotation axis 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 blades of the fan,
In a plane orthogonal to the rotation axis of the fan drive motor, the fan drive motor is disposed at a position that does not overlap with an imaginary straight line connecting the rotation axes of the adjacent fans.
An indoor unit for an air conditioner, further comprising: a travel distance calculation unit that calculates a travel distance of the belt; and an information notification unit that notifies a user of information related to the travel distance.   The material of the pulley of the belt drive mechanism is an alloy casting using aluminum as a base material, and is subjected to anodizing, hard anodizing, or electroless nickel plating. The air conditioner indoor unit according to any one of the above.   The pulley of the belt drive mechanism is an alloy casting made of iron as a base material. Electroless nickel plating, chromium plating, flash, hard chrome plating, chromate treatment, manganese phosphate coating, zinc phosphate coating, salt bath The indoor unit of the air conditioner according to any one of claims 1 to 12, wherein soft nitriding, gas soft nitriding, or quenching is performed.   An air conditioner comprising the indoor unit according to any one of claims 1 to 14.

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