CN113994148A

CN113994148A - Indoor unit of air conditioner

Info

Publication number: CN113994148A
Application number: CN201980097606.2A
Authority: CN
Inventors: 镰田贤治
Original assignee: Toshiba Carrier Corp
Current assignee: Toshiba Carrier Corp
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2022-01-28
Anticipated expiration: 2039-06-21
Also published as: EP3988848A1; JP7265628B2; JPWO2020255381A1; WO2020255381A1; EP3988848A4; CN113994148B

Abstract

An indoor unit of an air conditioner according to the present embodiment includes: a cross-flow fan that forms an air flow that sucks in indoor air from the air intake port and blows out the air into the room from the air outlet port; a fan motor that drives the cross flow fan; a holding case that holds the fan motor inside; an insertion portion that is inserted into the holding case that holds the fan motor therein; a vibration isolation member that is housed in the holding case together with the fan motor and absorbs vibration generated when the fan motor is driven; and a compression portion that compresses the vibration preventing member in the holding case as the holding case, in which the fan motor is held, is fitted into the fitting portion.

Description

Indoor unit of air conditioner

Technical Field

Embodiments of the present invention relate to an indoor unit of an air conditioner.

Background

For example, in an indoor unit of an air conditioner in which a cross-flow fan for forming an air flow is driven by a fan motor, as disclosed in patent document 1, the fan motor is held in a holding casing, the holding casing is assembled into the indoor unit, and a portion of the holding casing on the opposite side of the motor shaft is fixed by, for example, fastening a screw. According to this configuration, the work of installing the fan motor into the indoor unit can be easily performed, and the indoor unit can be easily manufactured. In addition, the operation of detaching the fan motor from the indoor unit is also easy, and the maintenance of the indoor unit is facilitated.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2012-112546

Disclosure of Invention

Technical problem to be solved by the invention

However, in the conventional structure, although the fan motor is firmly fixed to the portion of the holding case on the opposite side to the motor shaft, the fan motor is not sufficiently fixed to the portion of the holding case on the motor shaft side. Therefore, the vibration generated when the fan motor is driven may not be sufficiently absorbed, and the noise generated by the vibration of the fan motor may not be sufficiently suppressed.

Therefore, the present embodiment provides an indoor unit of an air conditioner capable of sufficiently suppressing vibration and noise generated when a fan motor is driven.

Technical scheme for solving technical problem

An indoor unit of an air conditioner according to the present embodiment includes: a cross-flow fan that forms an air flow that sucks in indoor air from the air intake port and blows out the air into the room from the air outlet port; a fan motor that drives the cross flow fan; a holding case that holds the fan motor inside; an insertion portion that is inserted into the holding case that holds the fan motor therein; a vibration isolation member that is housed in the holding case together with the fan motor and absorbs vibration generated when the fan motor is driven; and a compression unit that compresses the vibration-proof member in the holding case as the holding case, which holds the fan motor therein, is fitted into the fitting unit.

Drawings

Fig. 1 is a front view schematically showing a configuration example of an interior of an indoor unit of an air conditioner according to the present embodiment.

Fig. 2 is an enlarged view schematically showing a configuration example of the fan motor and its peripheral portion according to the present embodiment, and showing an example of a state in which the fan motor is mounted.

Fig. 3 is a perspective view schematically showing a configuration example of the fan motor according to the present embodiment.

Fig. 4 is an enlarged view schematically showing an example of the structure of the fan motor and its peripheral portions according to the present embodiment, with the fan motor removed.

Detailed Description

Next, an embodiment of an indoor unit of an air conditioner will be described with reference to the drawings. An indoor unit 10 of the air conditioner illustrated in fig. 1 constitutes an air conditioner together with an outdoor unit, not shown, installed outdoors. The indoor unit 10 includes a cross-flow fan 12 and the like inside a rectangular indoor unit main body 11 constituting the outer contour thereof. An air inlet 13 is provided at the upper part of the indoor unit main body 11, and an air outlet 14 is provided at the lower part of the indoor unit main body 11. The indoor unit main body 11 also has an air flow path 15 extending from the air inlet 13 to the air outlet 14. In the air flow path 15, an unillustrated air filter, an unillustrated heat exchanger, the cross-flow fan 12, louvers 16, and the like are provided from the upstream side, which is the air inlet 13 side, to the downstream side, which is the air outlet 14 side.

The air filter serves to capture foreign substances contained in the air sucked through the air suction port 13. The heat exchanger exchanges heat with the air sucked from the air suction port 13 to heat or cool the air. The cross-flow fan 12 forms an air flow, sucks in indoor air from the air suction port 13, and blows the air into the room from the air blowing port 14 through the air blowing path 15. The louvers 16 adjust the direction of the air blown out from the air outlet 14.

A fan motor 100 for driving the cross flow fan 12 is further provided inside the indoor unit main body 11. In the present embodiment, the fan motor 100 is provided inside the indoor unit main body 11 and inside the machine room 17 provided on the right side of the air flow path 15 when viewed from the front side of the indoor unit 10.

Next, a configuration example of the fan motor 100 will be described in detail. As illustrated in fig. 2, the fan motor 100 includes a substantially cylindrical motor main body 101 and a motor shaft 102. A stator and a rotor, not shown, are housed inside the motor main body 101. The motor main body 101 has a known structure in which a rotatable cylindrical rotor is provided inside an annular stator. Motor shaft 102 serves as a rotation center shaft of the rotor, and is provided so as to rotate integrally with the rotor. The motor shaft 102 projects from one end surface in the axial direction of the fan motor 100 (in the present embodiment, the end surface located on the left side when viewed from the front side of the indoor unit 10), but does not project from the other end surface in the axial direction of the fan motor 100 (in the present embodiment, the end surface located on the right side when viewed from the front side of the indoor unit 10).

Further, as illustrated in fig. 3, fan motor 100 is assembled into machine chamber 17 while being held inside holding case 200. The holding case 200 is entirely composed of, for example, a resin material. The holding case 200 has a substantially circular shape, and houses the entire motor main body 101 of the fan motor 100. The holding case 200 is formed by combining a plurality of (2 in the case of the present embodiment)

case forming members

201A, 201B.

On one axial end side of the holding case 200 (in the present embodiment, a portion located on the left side when viewed from the front of the indoor unit 10), the locking protrusion 202A provided on the case forming member 201A is locked to the locking frame portion 202B provided on the case forming member 201B. Thereby, the state in which the case forming member 201A and the case forming member 201B are combined is maintained.

On the other axial end side of the holding casing 200 (in the present embodiment, the portion located on the right side as viewed from the front of the indoor unit 10), the screw hole portion 203A provided in the casing forming member 201A and the screw hole portion 203B provided in the casing forming member 201B are fastened together by a screw 204. Thereby, the state in which the case forming member 201A and the case forming member 201B are combined is maintained.

A plurality of windows 205 are also provided on the circumferential surface of the holding case 200. In the present embodiment, the window 205 is a hole having a rectangular opening. The shape, size, number, and the like of the window 205 may be appropriately changed. The window 205 is exposed on the side circumferential surface of the motor main body 101 of the fan motor 100. Therefore, the holding case 200 can dissipate heat generated by the fan motor 100, particularly the motor main body 101, to the outside through the window portion 205 during driving. Accordingly, the heat generated by fan motor 100 is not likely to stay inside holding case 200.

Further, a compression portion 206 is provided at a central portion of one end surface (the end surface located on the left side when viewed from the front side of the indoor unit 10 in the present embodiment) in the axial direction of the holding casing 200. The compression portion 206 is provided integrally with one axial end surface of the holding case 200, and protrudes leftward from the one axial end surface of the holding case 200 to have a substantially circular shape. The outer edge of the compression portion 206 further has a plurality of (4 in the present embodiment) slits 206 a. In the present embodiment, the plurality of slits 206a are disposed at equal intervals at the outer edge of the compression portion 206.

The compression portion 206 has a plurality of slits 206a, and thus a plurality of (4 in the case of the present embodiment) compression piece portions 206b are provided between the slits 206 a. The plurality of compression piece portions 206b are elastically deformable inward in the radial direction of the compression portion 206 when an external force is applied. Further, pressing portions 206c for pressing the vibration-proof rubber 300 described later are provided at the distal ends of the plurality of compression pieces 206b, respectively. The plurality of pressing portions 206c are arranged in an annular shape around the motor shaft 102.

The motor main body 101 of the fan motor 100 and the vibration isolation rubber 300 are housed together in the holding case 200. The vibration-proof rubber 300 is an example of a vibration-proof member, and in the case of the present embodiment, is housed inside the compression portion 206 in the holding case 200. The vibration isolation member 300 is annular and disposed inside the compression portion 206 so as to surround the motor shaft 102 of the fan motor 100. Vibration-proof rubber 300 mainly functions to absorb vibration generated when the fan motor is driven.

In the motor case 200, not only the motor shaft 102 side but also the opposite side of the motor shaft 102 accommodates the vibration-proof rubber 300. In the case of the present embodiment, the anti-vibration rubber 300 on the opposite side of the motor shaft 102 is formed of the same material as the anti-vibration rubber 300 on the motor shaft 102 side, and is formed in the same size, the same shape, and the same thickness. However, the anti-vibration rubber 300 on the opposite side of the motor shaft 102 may be formed of a different material from the anti-vibration rubber 300 on the motor shaft 102 side, or may be formed in a different size, a different shape, or a different thickness.

As illustrated in fig. 2, a partition wall 19 that partitions the air flow path 15 and the machine room 17 is provided inside the indoor unit main body 11. The partition wall 19 is multiple, and in the present embodiment, is a double wall including an air flow path side wall 19A and a machine room side wall 19B. The air blowing path side wall portion 19A is provided with a shaft insertion hole 20A having a circular opening. The motor shaft 102 of the fan motor 100 is inserted through the shaft insertion hole 20A from the machine chamber 17 side to the air blowing path 15 side. The front end of motor shaft 102 of fan motor 100 inserted through shaft insertion hole 20A is connected to cross flow fan 12 in air blowing path 15. Accordingly, fan motor 100 can rotate cross flow fan 12 via motor shaft 102.

On the other hand, the machine chamber side wall portion 19B is provided with an insertion hole portion 400 having a circular opening. The insertion hole portion 400 is an example of an insertion portion. The opening diameter of the insertion hole portion 400 is larger than the opening diameter of the shaft insertion hole 20A. The axial center of the insertion hole 400 coincides with the axial center of the shaft insertion hole 20A. The insertion hole 400 is inserted into the compression portion 206 of the holding case 200 that holds the motor main body 101 of the fan motor 100 therein.

Here, as illustrated in fig. 4, the diameter dimension DA, which is the size DA of the insertion hole 400, is slightly smaller than the diameter DB, which is the size DB of the compression portion 206 in the natural state in which the insertion hole 400 is not inserted, in other words, the diameter DB, which is the size DB of the compression portion 206 in the state in which the plurality of compression piece portions 206 are not elastically deformed. In the present embodiment, the size DA of the insertion hole 400 is slightly smaller than the size DB of the distal end of the compression portion 206 in the natural state. The size DA of the insertion hole 400 may be smaller than the diameter of any portion between the distal end portion and the proximal end portion of the compression portion 206 in the natural state.

According to the above configuration, as the compression portion 206 of the holding case 200 is fitted into the fitting hole 400, the plurality of compression pieces 206b are pressed against the inner circumferential surface of the fitting hole 400, and the compression pieces 206b are elastically deformed radially inward. Thereby, the vibration-proof rubber 300 inside the compression portion 206 is pressed and compressed by the plurality of compression piece portions 206 b.

The side peripheral surface of the compression portion 206, i.e., the side surface of the plurality of compression pieces 206b, is formed in a tapered shape that tapers toward the insertion hole portion 400, i.e., from the proximal end portion to the distal end portion. Therefore, as compression portion 206 is fitted into fitting hole 400, the plurality of compression piece portions 206b are elastically deformed further radially inward, and the compression strength of vibration-proof rubber 300 can be further increased.

According to the indoor unit 10 of an air conditioner of the present embodiment, as the compression portion 206 of the holding case 200 holding the motor main body 101 of the fan motor 100 inside is fitted into the fitting hole portion 400, the vibration-proof rubber 300 in the compression portion 206 of the holding case 200 can be compressed by the compression portion 206 that is elastically deformed. According to this configuration, the fixation strength of the fan motor 100 on the motor shaft 102 side can be improved by the compressed vibration-proof rubber 300. Therefore, according to the indoor unit 10, the fan motor 100 can be sufficiently fixed not only to the portion on the opposite side of the motor shaft 102 fixed by the screw 204 but also to the portion on the motor shaft 102 side of the holding case 200, and vibration and noise generated when the fan motor 100 is driven can be sufficiently suppressed as compared with the conventional configuration.

In addition, according to the indoor unit 10, the compression unit 206 is provided integrally with the holding casing 200. According to this configuration, the compression portion 206 can be fitted into the fitting hole portion 400 at the same time as the holding case 200 holding the motor main body portion 101 of the fan motor 100 therein is attached to the inside of the indoor unit main body portion 11. Accordingly, the work of mounting the fan motor 100 into the indoor unit main body 11 can be easily performed, and the manufacturing of the indoor unit 10 can be facilitated.

In addition, according to the indoor unit 10, the compression unit 206 has a plurality of slits 206 a. According to this configuration, when compression portion 206 is fitted into fitting hole portion 400, compression portion 206 can be easily elastically deformed, and vibration-proof rubber 300 can be compressed more effectively.

In addition, according to the indoor unit 10, the plurality of slits 206a are arranged at equal intervals at the outer edge portion of the compression portion 206. According to this configuration, the compression of the anti-vibration rubber 300 by the compression portion 206 can be performed uniformly from the outer peripheral portion of the anti-vibration rubber 300, and the anti-vibration rubber 300 can absorb vibration uniformly.

According to the indoor unit 10, the surface of the side peripheral surface of the compression portion 206 that comes into contact with the inner peripheral surface of the insertion hole portion 400 when the fan motor 100 is assembled is tapered toward the insertion hole portion 400. According to this configuration, as compression portion 206 is fitted into fitting hole portion 400, the compression strength of anti-vibration rubber 300 by compression portion 206 is increased, and anti-vibration rubber 300 can be compressed more reliably.

In the indoor unit 10, the size of the insertion hole 400 is slightly smaller than the size of the compression unit 206 in a natural state that is not inserted into the insertion hole 400. According to this configuration, as compression portion 206 is fitted into fitting hole portion 400, the compression strength of anti-vibration rubber 300 by compression portion 206 is increased, and anti-vibration rubber 300 can be compressed more reliably.

The present embodiment is not limited to the above-described one embodiment, and various modifications and extensions may be made without departing from the scope of the present embodiment. For example, the vibration-proof member is not limited to a vibration-proof rubber formed of a rubber material, and various materials may be used as long as they have a property of absorbing vibration.

For example, when the diameter of the vibration-proof rubber 300 is 42mm, the vibration-proof rubber 300 can be compressed by about 1 mm. In this case, the compression ratio of the vibration-proof rubber 300 is about 2% at 1mm/42 mm. The compression rate of the vibration-proof rubber 300 may be set to a certain range, and is preferably set to a range of about 1% to 3%, for example. In order to achieve such a compression rate, the size and shape of the compression portion 206, the number and spacing of the slits 206a, the number, shape, size, and arrangement position of the compression pieces 206b, the size and shape of the insertion hole 400, and the size and shape of the vibration-proof rubber 300 may be set.

The number of slits 206a provided in the compression portion 206 may be changed as appropriate, and may be 3 or less, or may be 5 or more. The slits 206a may not be equally spaced, and a plurality of slits 206a may be unequally spaced. The holding case 200 may be made of, for example, a metal material as long as at least the compression portion 206 is elastically deformable.

The compression unit 206 is not limited to a circular shape, and may be implemented in a shape such as a triangle, a quadrangle, an ellipse, or a polygon, for example, as appropriate. The insertion hole 400 is not limited to a circular shape, and may be implemented by appropriately changing the shape to a triangular shape, a quadrangular shape, an elliptical shape, a polygonal shape, or the like. The shapes of the compression portion 206 and the insertion hole portion 400 are not necessarily the same, and may be different. Accordingly, for example, the quadrangular compression portion 206 may be fitted into the circular fitting hole portion 400.

The present embodiments are merely examples, and do not limit the scope of the invention. These new embodiments may be implemented in other various ways, and various omissions, substitutions, and changes may be made without departing from the scope of the invention. The present embodiment and its modifications are included in the scope and gist of the invention, and are also included in the invention described in the scope of claims and the equivalent scope thereof.

Claims

1. An indoor unit of an air conditioner, comprising:

a cross-flow fan that forms an air flow that sucks in indoor air from the air intake port and blows out the air into the room from the air outlet port;

a fan motor that drives the cross flow fan;

a holding case that holds the fan motor inside;

an insertion portion that is inserted into the holding case that holds the fan motor therein;

a vibration isolation member that is housed inside the holding case together with the fan motor and absorbs vibration generated when the fan motor is driven; and

a compression portion that compresses the vibration preventing member in the holding case as the holding case that holds the fan motor therein is fitted into the fitting portion.

2. An indoor unit of an air conditioner according to claim 1,

the compression portion is provided integrally with the holding case.

3. An indoor unit of an air conditioner according to claim 1 or 2,

the compression portion has a slit.

4. An indoor unit of an air conditioner according to claim 3,

the slits are arranged at equal intervals at the outer edge of the compression portion.

5. An indoor unit of an air conditioner according to any one of claims 1 to 4,

the compression portion is tapered toward the insertion portion side.

6. An indoor unit of an air conditioner according to any one of claims 1 to 5,

the size of the fitting portion is smaller than the size of the compression portion in a natural state in which the fitting portion is not fitted.