WO2022269844A1

WO2022269844A1 - Indoor unit for air conditioner

Info

Publication number: WO2022269844A1
Application number: PCT/JP2021/023885
Authority: WO
Inventors: 竜児内村; 裕紀西川
Original assignee: 三菱電機株式会社
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2022-12-29
Also published as: JPWO2022269844A1

Abstract

An indoor unit for an air conditioner, comprising: a housing forming an outer shell; a heat exchanger that is provided inside the housing, and that exchanges heat between air and a refrigerant; and a blower that is provided inside the housing, and that sends air to the heat exchanger, wherein the housing has a pair of first rails that allow the blower to slide in the width direction of the housing, and a pair of second rails that allow the blower to slide in the depth direction of the housing.

Description

indoor unit of air conditioner

The present disclosure relates to an indoor unit of an air conditioner that adjusts air in an air-conditioned room.

Conventionally, indoor units of air conditioners that perform cooling or heating by adjusting the air in the air-conditioned room are known. Devices such as a heat exchanger, an air blower, a control box and a drain pan are provided inside the housing of the indoor unit. Here, as a method of driving an air blower, a method in which a motor and a fan are directly connected and the motor is controlled by an inverter is known. There are two types of blower motors: single-shaft motors in which one fan is attached to one motor, and double-shaft motors in which two fans are attached to one motor. The double shaft motor is useful for expanding the range of air volume and saving space because two fans are attached to one motor.

Air conditioners undergo maintenance work such as replacing internal parts, removing internal parts and reinstalling them after cleaning. For this reason, air conditioners have various structures in order to ensure workability in maintenance such as part replacement and cleaning. For example, a large housing is provided to secure a large work space, an opening for maintenance is provided on the exterior surface of the housing and the opening is closed with a detachable panel, and a rail for moving parts is provided so that the parts can be moved. For example, it can be pulled out of the housing and replaced.

Patent Literature 1 discloses an air conditioner for a computer room in which one dual-shaft motor and two fans are arranged, and the motor rotates and drives the two fans. In Patent Document 1, when maintenance is performed, the second fan is separated from the motor, the fan case of the second fan is detached, and the second fan is temporarily placed in the housing. In this state, the motor and the first fan are pulled forward along the rail installed under the motor and replaced.

Patent Document 2 discloses an air conditioner in which a fan stand on which a fan is placed is pulled out to the front side of the housing. In Patent Literature 2, the blower is installed in the middle stage apart from the top plate, and the entire blower is pulled out to the front side of the housing along rails provided on the housing. The pulled-out blower is placed on a flat surface such as a workbench and then disassembled for replacement of the motor, replacement of the fan, maintenance, and the like.

Japanese Patent No. 4807350 Japanese Patent No. 6785938

However, in the air conditioner disclosed in Patent Document 1 and the air conditioner disclosed in Patent Document 2, the blower is pulled out along the rail only in the front direction of the housing. Therefore, the degree of freedom in installing the blower in the housing is low.

The present disclosure has been made to solve the above-described problems, and provides an indoor unit of an air conditioner with a high degree of freedom in installing a fan inside a housing.

An indoor unit of an air conditioner according to the present disclosure includes a housing that constitutes an outer shell, a heat exchanger that is provided inside the housing and exchanges heat between air and a refrigerant, and a heat exchanger that is provided inside the housing. and a blower for sending air to the heat exchanger, the housing includes a pair of first rails for sliding the blower in the width direction of the housing, and a pair of second rails for sliding the blower in the depth direction of the housing. and a rail of

According to the present disclosure, the pair of first rails slides the blower in the width direction of the housing, and the pair of second rails slides the blower in the depth direction. This allows the blower to move freely in the width direction and the depth direction within the housing. Therefore, there is a high degree of freedom in installing the blower inside the housing.

1 is a circuit diagram showing an air conditioner according to Embodiment 1. FIG. 1 is a perspective view showing an indoor unit according to Embodiment 1; FIG. FIG. 2 is a perspective view showing a front-side first rail, a rear-side first rail, and a second rail according to Embodiment 1; FIG. 4 is a perspective view showing a main part of a front-side first guide part according to Embodiment 1; FIG. 4 is a perspective view showing a main part of a front-side first guide part according to Embodiment 1; FIG. 4 is a perspective view showing a main portion of a first back side guide portion according to Embodiment 1; FIG. 4 is a perspective view showing a main part of a second guide part according to Embodiment 1; 1 is a perspective view showing an air blower according to Embodiment 1; FIG. 1 is a perspective view showing a fan case according to Embodiment 1; FIG. FIG. 2 is an enlarged perspective view showing a main part of the fan case according to Embodiment 1; 3 is a perspective view showing the fan and boss according to Embodiment 1. FIG. 4 is a side view showing the fan case and duct according to Embodiment 1; FIG. 4 is a side view showing the fan case and duct according to Embodiment 1; FIG. FIG. 4 is a diagram showing a manner in which the blower according to Embodiment 1 is removed; FIG. 4 is a diagram showing a manner in which the blower according to Embodiment 1 is removed; Fig. 10 is a perspective view showing an indoor unit according to Embodiment 2; FIG. 10 is a diagram showing a manner in which the blower according to Embodiment 2 is removed; FIG. 10 is a diagram showing a mode in which a motor according to Embodiment 2 is removed; FIG. 10 is a diagram showing a mode in which a motor according to Embodiment 2 is removed;

Hereinafter, embodiments of the indoor unit of the air conditioner of the present disclosure will be described with reference to the drawings. It should be noted that the present disclosure is not limited by the embodiments described below. In addition, in the following drawings, including FIG. 1, the size relationship of each constituent member may differ from the actual one. In addition, in the following description, directional terms are used as appropriate to facilitate understanding of the present disclosure, but this is for the purpose of describing the present disclosure, and these terms are intended to limit the present disclosure. is not. Directional terms include, for example, "up", "down", "right", "left", "front" or "back".

Embodiment 1.
FIG. 1 is a circuit diagram showing an air conditioner 100 according to Embodiment 1. FIG. The air conditioner 100 is a device that adjusts air in an air-conditioned room, and as shown in FIG. 1, includes an outdoor unit 60 and an indoor unit 100a. The outdoor unit 60 is provided with, for example, a compressor 63 , a channel switching device 67 , an outdoor heat exchanger 64 , an outdoor fan 65 and an expansion section 66 . The indoor unit 100a is provided with a heat exchanger 2 and a fan 11, for example.

A refrigerant circuit 61 is configured by connecting the compressor 63 , the flow path switching device 67 , the outdoor heat exchanger 64 , the expansion section 66 and the heat exchanger 2 by refrigerant pipes 62 . The compressor 63 sucks in a low-temperature, low-pressure refrigerant, compresses the sucked-in refrigerant, converts it into a high-temperature, high-pressure refrigerant, and discharges it. The compressor 63 is, for example, a capacity-controllable inverter compressor. The flow switching device 67 switches the direction in which the refrigerant flows in the refrigerant circuit 61, and is, for example, a four-way valve. The outdoor heat exchanger 64 exchanges heat, for example, between outdoor air and refrigerant. The outdoor heat exchanger 64 acts as a condenser during cooling operation and acts as an evaporator during heating operation. The expansion part 66 is a pressure reducing valve or an expansion valve that reduces the pressure of the refrigerant to expand it. The expansion part 66 is, for example, an electronic expansion valve whose opening is adjusted.

The heat exchanger 2 exchanges heat, for example, between indoor air and refrigerant. The heat exchanger 2 acts as an evaporator during cooling operation and acts as a condenser during heating operation. The blower 11 is a device that sends indoor air to the heat exchanger 2 .

(Operating mode, cooling operation)
Next, operation modes of the air conditioner 100 will be described. First, the cooling operation will be explained. In the cooling operation, the refrigerant sucked into the compressor 63 is compressed by the compressor 63 and discharged in a high-temperature and high-pressure gas state. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 63 passes through the flow switching device 67 and flows into the outdoor heat exchanger 64 acting as a condenser. It is heat-exchanged with outdoor air sent by 65 to condense and liquefy. The condensed liquid refrigerant flows into the expansion section 66, where it is expanded and decompressed to become a low-temperature, low-pressure gas-liquid two-phase refrigerant. Then, the gas-liquid two-phase refrigerant flows into the heat exchanger 2 acting as an evaporator, where it is heat-exchanged with the indoor air sent by the blower 11 to evaporate and become gas. At this time, the indoor air is cooled, and cooling is performed in the room. The vaporized low-temperature, low-pressure gaseous refrigerant passes through the flow path switching device 67 and is sucked into the compressor 63 .

(Operating mode, heating operation)
Next, the heating operation will be explained. In the heating operation, the refrigerant sucked into the compressor 63 is compressed by the compressor 63 and discharged in a high-temperature and high-pressure gas state. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 63 passes through the flow switching device 67 and flows into the heat exchanger 2 acting as a condenser. It is heat exchanged with the indoor air that is flowing and condenses and liquefies. At this time, the indoor air is warmed, and heating is performed in the room. The condensed liquid refrigerant flows into the expansion section 66, where it is expanded and decompressed to become a low-temperature, low-pressure gas-liquid two-phase refrigerant. Then, the gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 64 acting as an evaporator, where it is heat-exchanged with the outdoor air sent by the outdoor blower 65 to evaporate and gasify. do. The vaporized low-temperature, low-pressure gaseous refrigerant passes through the flow path switching device 67 and is sucked into the compressor 63 .

It should be noted that the air conditioner 100 may not have the channel switching device 67 . In this case, the air conditioner 100 serves as a cooling-only machine or a heating-only machine.

(Indoor unit 100a)
FIG. 2 is a perspective view showing the indoor unit 100a according to Embodiment 1. FIG. As shown in FIG. 2, the indoor unit 100a includes a housing 50, a drain pan 9, a motor base 19, a blower 11, a duct 21, a connection flange 22, a heat exchanger 2, and a control box 8. I have.

(Case 50)
The housing 50 has a rectangular parallelepiped shape, and includes an underframe 3, four pillars 4, a rear panel 1, two

side panels

5 and 6, a front panel 3a, and a top panel 7. ,have. The underframe 3 is a rectangular member forming a bottom surface, and is placed on a floor or the like, for example. The struts 4 are members erected upward from the four corners of the underframe 3 and have, for example, an L-shaped cross section. The rear panel 1 is a rectangular member that is provided between two pillars 4 on the rear side of the housing 50 and constitutes the rear surface. The rear panel 1 is formed with an intake port 1a for taking air into the housing 50 . The

side panels

5 and 6 are rectangular members that are provided between the two pillars 4 on the side of the housing 50 and constitute the side. The front panel 3a is a rectangular member that is provided between the two pillars 4 on the front side of the housing 50 and constitutes the front surface. The top panel 7 is a rectangular member that is attached to the upper ends of the four support columns 4 and constitutes the top surface. A blowout port 10 for blowing out air is formed in the center of the top panel 7 . The housing 50 constitutes an air passage covered by the underframe 3 , the rear panel 1 , the

side panels

5 and 6 , the front panel 3 a and the top panel 7 .

(Rail 40)
FIG. 3 is a perspective view showing the front-side first rail 15a, the rear-side first rail 15b, and the second rail 17 according to the first embodiment. The housing 50 further has a rail 40 that connects the two pillars 4 in the middle of the housing 50 . As shown in FIG. 3, the rails 40 consist of a pair of first rails 15 and two pairs of second rails 17 . The pair of first rails 15 slides the blower 11 in the width direction of the housing 50, and consists of a front-side first rail 15a and a rear-side first rail 15b. The two pairs of second rails 17 slide the blower 11 in the depth direction of the housing 50, and each consists of a second fan rail 17a and a second motor rail 17b.

(Front-side first rail 15a)
The first rail 15a on the front side is a member that connects the two support columns 4 on the side of the front panel 3a, and extends laterally. The first rail 15a on the front side has a U-shaped cross section, and the bottom of the U-shaped protrudes to the rear side. The upper surface 16a of the front first rail 15a is lubricated. The first rail 15 a on the front side is provided parallel to the underframe 3 .

(First rear rail 15b)
The first rear-side rail 15b is a member that connects the two support columns 4 on the rear panel 1 side, and extends laterally. The first rear rail 15b has a U-shaped cross section, and the bottom of the U-shaped protrudes forward. The upper surface 16b of the rear first rail 15b is lubricated. The blower 11 mounted on the upper surface 16a of the front-side first rail 15a and the upper surface 16b of the rear-side first rail 15b moves along the front-side first rail 15a and the rear-side first rail 15b. It slides in the width direction of 50. The rear-side first rail 15 b is provided parallel to the underframe 3 .

(Second rail 17a for fan)
The second fan rail 17a is a member that connects the first front rail 15a and the first rear rail 15b, and extends in the depth direction. The second fan rail 17a has a plate shape, and the blower 11 is placed thereon. The blower 11 slides in the depth direction along the second fan rail 17a. The second fan rail 17a is provided parallel to the underframe 3 and perpendicular to the front first rail 15a and the rear first rail 15b. The upper surface 18 of the second fan rail 17a is lubricated.

(Second rail 17b for motor)
The second motor rail 17b is a member that connects the first rail 15a on the front side and the first rail 15b on the back side, and extends in the depth direction. A motor base 19 is mounted on the second motor rail 17b. The motor base 19 slides in the depth direction along the second motor rail 17b on which the motor base 19 is mounted. The second motor rail 17b is provided parallel to the underframe 3 and perpendicular to the first rail 15a on the front side and the first rail 15b on the rear side. The upper surface 18 of the second motor rail 17b is lubricated.

Here, the method of lubricating the rails 40 will be described. As a lubricating method, for example, there is a method in which a slip-promoting tape having a reduced coefficient of friction on the surface is attached. Further, a fluororesin plate material is attached to the upper surface 16a of the first front rail 15a and the upper surface 16b of the first rear rail 15b so as to combine iron and fluororesin, a material having a small coefficient of friction. . Further, a fluororesin plate material is attached to the upper surface 18a of the second fan rail 17a and the upper surface 18b of the second motor rail 17b so as to combine iron and fluororesin, a material having a small coefficient of friction. .

Then, the motor base 19 and the fan case 14 are formed by the upper surface 16a of the first rail 15a on the front side, the upper surface 16b of the first rail 15b on the rear side, the upper surface 18a of the second rail 17a for the fan, and the second rail for the motor. It is installed on the upper surface 18b of 17b. Furthermore, a member such as a roller that suppresses friction may be provided in the rail 40 portion. Furthermore, fine dimples may be formed by spraying powder on the upper surface 16a of the front-side first rail 15a and the upper surface 16b of the rear-side first rail 15b by WPC processing. Also, fine dimples may be formed by spraying powder on the upper surface 18a of the second fan rail 17a and the upper surface 18b of the second motor rail 17b by WPC processing. As a result, the contact area is reduced, thereby reducing the coefficient of friction. In addition, the PIP process is applied to the upper surface 16a of the first rail 15a on the front side, the upper surface 16b of the first rail 15b on the rear side, the upper surface 18a of the second rail 17a for the fan, and the upper surface 18b of the second rail 17b for the motor. A powder lubricant may be applied.

(Guide portion 23)
The housing 50 further has guide portions 23 , which are provided on the rails 40 respectively.

(Front-side first guide portion 23a)
4 and 5 are both perspective views showing a main part of the front-side first guide portion 23a according to the first embodiment. 4 shows a state in which the first front guide portion 23a is attached to the first front rail 15a, and FIG. 5 shows the first front guide portion 23a extending from the first front rail 15a Indicates the removed state. As shown in FIGS. 3 and 4, the front-side first guide portion 23a is a plate-like member extending laterally, and is attached to the front-side first rail 15a with a thumbscrew 30. As shown in FIGS. The first guide portion 23 a on the front side prevents the blower 11 from falling off when it is slid in the width direction of the housing 50 .

Further, as shown in FIG. 5, the first front guide portion 23a is removed from the first front rail 15a. In this manner, the front-side first guide portion 23a is detachably provided on the front-side first rail 15a. Since the front-side first guide portion 23a is attached to the front-side first rail 15a by a thumbscrew 30, it can be removed without tools. By removing the front-side first guide portion 23a, the blower 11 does not have to be slid in the depth direction.

(Back side first guide portion 23b)
FIG. 6 is a perspective view showing a main part of the rear-side first guide portion 23b according to the first embodiment. As shown in FIG. 6, the first rear-side guide portion 23b is a plate-like member extending laterally, and is provided on the first rear-side rail 15b. The rear-side first guide portion 23 b prevents the blower 11 from falling off when it is slid in the width direction of the housing 50 . The first rear guide portion 23b is molded integrally with the first rear rail 15b, and is a portion formed by bending the upper end of the first rear rail 15b.

(Second guide portion 23c)
FIG. 7 is a perspective view showing a main part of the second guide portion 23c according to Embodiment 1. FIG. As shown in FIG. 7, the second guide portion 23c is provided on the side closer to the two

side panels

5 and 6 of the pair of the second fan rails 17a and the pair of the second motor rails 17b. It is a plate-like member extending in the depth direction. The second guide portion 23 c prevents the blower 11 from falling off when it is slid in the width direction of the housing 50 . The second guide portion 23c is molded integrally with the second rail 17, and is a portion in which the upper end portion of the second rail 17 is bent. The second guide portion 23c also has a function of determining the position of the fan 11 in the width direction of the housing 50 when the fan 11 is slid in the depth direction.

(Drain pan 9)
As shown in FIG. 2 , the drain pan 9 is a plate-like member provided inside the underframe 3 and receives drain water dropping from the heat exchanger 2 .

(Motor stand 19)
As shown in FIG. 2, the motor base 19 slides along the front-side first rail 15a, the rear-side first rail 15b, and the second motor rail 17b. be placed. The motor base 19 is attached to the first rail 15a on the front side and the first rail 15b on the back side with hexagon bolts.

(Blower 11)
FIG. 8 is a perspective view showing fan 11 according to the first embodiment. As shown in FIGS. 2 and 8, the blower 11 is provided inside the housing 50 on the first front rail 15a, the first rear rail 15b, and the second fan rail 17a. The blower 11 has a fan case 14 , a fan 13 , a boss 27 and a motor 12 .

(Fan case 14)
FIG. 9 is a perspective view showing fan case 14 according to the first embodiment, and FIG. 10 is an enlarged perspective view showing a main part of fan case 14 according to the first embodiment. As shown in FIGS. 9 and 10, the fan case 14 is a case in which the fan 13 is housed. The fan case 14 slides along the first front rail 15a, the first rear rail 15b, and the second fan rail 17a, and is attached to the first front rail 15a and the rear rail 17a by hexagon bolts. It is fixed to the first rail 15b. An upper end portion of the fan case 14 is formed with a blower outlet 20 through which the air sent from the fan 13 is blown. The fan case 14 is provided with a bell mouth 24 for guiding air.

(Fan 13)
FIG. 11 is a perspective view showing fan 13 and boss 27 according to the first embodiment. As shown in FIGS. 9 and 11, the fan 13 is provided inside the fan case 14 and sends air to the heat exchanger 2 by rotating. The fan 13 is arranged on the front side of the central portion of the heat exchanger 2 . As a result, the air entering from the intake port 1a of the housing 50 evenly passes through the central portion of the heat exchanger 2. As shown in FIG.

(Boss 27)
As shown in FIG. 11, the boss 27 is a member that is provided at the center of the fan 13 and supports the fan 13, and is integrally formed with the fan 13 by welding. The boss 27 is fastened to the shaft of the motor 12 and has the function of transmitting the rotation of the motor 12 to the fan 13 . The boss 27 is directed to the side where the space is wide, that is, the side opposite to the side where the motor 12 is provided with respect to the shaft so that the mounting work can be easily performed at the fixing portion (screw hole) to the shaft. In this way, since the boss 27 basically protrudes toward the side where the screw hole is formed, the length of the shaft is increased by the length of the boss 27 .

(motor 12)
The motor 12 rotates the fan 13 and is exposed outside the fan case 14 . The motor 12 is mounted on the motor base 19 as described above, and is fixed to the first rail 15a on the front side and the first rail 15b on the back side via the motor base 19. As shown in FIG. Although the motor 12 and the fan 13 are integrally connected in the first embodiment, the motor 12 and the fan 13 may be connected by a pulley and a belt.

(duct 21)
FIG. 12 is a side view showing fan case 14 and duct 21 according to the first embodiment. The right view of FIG. 12 is an enlarged view of the connection flange 22 in the left view of FIG. As shown in FIGS. 2 and 12, the duct 21 is a rectangular tubular member connected to the air outlet 10 formed in the top panel 7, and the air sent from the blower 11 flows inside.

(Connection flange 22)
FIG. 13 is a side view showing fan case 14 and duct 21 according to the first embodiment. The right view of FIG. 13 is an enlarged view of the connection flange 22 in the left view of FIG. As shown in FIG. 12 , the connection flange 22 is a frame-shaped member interposed between the blower outlet 20 and the duct 21 and detachably attached to the blower 11 . The connection flange 22 is provided with a sealing material 25 that enhances sealing performance.

Here, the connection between the fan case 14 and the duct 21 at the connection flange 22 will be described. The fan case 14 is fixed to the connection flange 22 at the blower outlet 20 from above with screws. At this time, the sealing material 25 provided on the connection flange 22 is compressed by tightening the screw, so that the air blown from the fan 13 is prevented from leaking into the housing 50 . The connection flange 22 is fixed to the duct 21 from both sides with screws. The connecting flange 22 can move vertically along the duct 21 by changing the positions of the screws on both sides.

(Heat exchanger 2)
As shown in FIG. 2, the heat exchanger 2 is installed over the entire intake port 1a formed in the rear panel 1. As shown in FIG. That is, the air sucked from the suction port 1 a passes through the heat exchanger 2 and enters the housing 50 .

(Control box 8)
The control box 8 is a box-shaped member that houses a control board (not shown) for controlling the operation of the blower 11 and the like. The control box 8 is arranged above the inside of the housing 50 so as to face the front panel 3a.

(Removal of blower 11)
14 and 15 are diagrams showing a manner in which blower 11 according to Embodiment 1 is removed. Next, a manner in which the blower 11 is removed will be described. As shown in FIG. 14, the motor 12 is separated from the fan 13 by sliding the motor 12 on the front first rail 15a and the rear first rail 15b in the width direction of the housing 50 away from the fan 13. be done.

In addition, when the fan 13 and the motor 12 are separated, the fan 13 may be held inside the fan case 14 by a wire connecting the fan 13 and the fan case 14 . The wires are provided with terminals through which screws are passed, for example, at both ends. Since the fan 13 is thereby held inside the fan case 14, it is not necessary to support the fan 13 manually. The wire is used only for maintenance and the like, and is removed after maintenance. At this time, fixing holes for fixing wires are formed in the fan 13 and the fan case 14 .

The motor 12 slides on the front-side first rail 15a and the rear-side first rail 15b until it contacts the second guide portion 23c of the second motor rail 17b. The fan case 14 slides in the width direction of the housing 50 on the front first rail 15a and the rear first rail 15b until it contacts the second guide portion 23c of the second fan rail 17a. . As described above, the connecting flange 22 moves vertically along the duct 21 to connect the blower outlet 20 and the blower outlet 10 without preventing the blower 11 from sliding.

In this state, as shown in FIG. 15, the motor 12 slides as the motor base 19 slides in the depth direction on the second motor rail 17b. As a result, the motor 12 is taken out of the housing 50 . Further, the fan case 14 slides along with sliding in the depth direction on the second fan rail 17a. As a result, the fan 13 provided in the fan case 14 is taken out of the housing 50 . Thus, the motor 12 and the fan 13 are taken out separately.

When the motor base 19 or the fan case 14 is slid in the depth direction, the first front guide portion 23a is removed from the first front rail 15a. After maintenance, the first front guide portion 23a is attached to the first front rail 15a again. In this manner, the first guide portion 23a on the front side prevents the motor base 19 or the fan case 14 from falling off when it slides in the width direction of the housing 50, and the motor base 19 or the fan case 14 slides in the depth direction. do not interfere with withdrawals.

According to the first embodiment, the pair of first rails 15 slide the fan 11 in the width direction of the housing 50 , and the pair of the second rails 17 slide the fan 11 in the depth direction. This allows the blower 11 to move freely in the width direction and the depth direction within the housing 50 . Therefore, the degree of freedom in installing the blower 11 in the housing 50 is high.

Conventionally, in an air conditioner with a large capacity, if the blower motor and fan are large and heavy, it is difficult to manually separate the motor and fan. In contrast, in Embodiment 1, the fan 11 is slid in the width direction of the housing 50 by the first rail 15a on the front side and the first rail 15b on the back side, and the fan 11 is moved in the depth direction by the second rail 17. slide in the direction Therefore, it is easy to separate the motor 12 and the fan 13 manually. Further, conventionally, there is known an air conditioner in which the motor and the fan cannot be taken out separately even if only the motor needs to be taken out. Since the motor 12 and the fan 13 can be separated from each other in the first embodiment, only the motor 12 can be taken out.

The direction in which the motor base 19 and the fan case 14 are taken out is not limited to the front side in the depth direction. For example, the side panel 6 may be formed with an opening through which the blower 11 is taken out, and the housing 50 may further have a detachable opening/closing panel that closes the opening formed in the side panel 6 . First, the opening/closing panel is removed while the fan case 14 is slid to the second guide portion 23c. After that, when the bell mouth 24 of the fan case 14 is removed, the fan 13 can be taken out from the opening formed in one side panel 6 .

Also, the motor base 19 is taken out from the opening formed in the other side panel 6 as well as the fan 13 . In this way, the motor base 19 and the fan case 14 may be pulled out sideways. That is, the direction of maintenance can be appropriately changed according to the installation state of the air conditioner 100 . Therefore, the maintenance workability of the blower 11 is improved. Conventionally, it is necessary to use a heavy machine such as a lift to draw out the blower 11, and it is necessary to secure a large space for the drawing work. In contrast, in Embodiment 1, the direction of maintenance can be changed, so it is easy to secure work space.

Embodiment 2.
FIG. 16 is a perspective view showing an indoor unit 100b according to Embodiment 2. FIG. Embodiment 2 differs from Embodiment 1 in that the motor 26 has both shafts. In the second embodiment, the same reference numerals are assigned to the same parts as in the first embodiment, and the description thereof is omitted.

As shown in FIG. 16, the motor 26 has two shafts extending on both sides and each provided with a fan 13 . Two air outlets 10 are formed in the top panel 7 so as to correspond to the respective fans 13 . The blower 11 has a motor 26 , two fans 13 and two fan cases 14 . The motor 26 is arranged on the front side of the central portion of the heat exchanger 2, and two fan cases 14 are arranged at both ends. As a result, the air sucked inside from the intake port 1a of the housing 50 evenly passes through the central portion of the heat exchanger 2. As shown in FIG. A blower outlet 20 is formed in each of the two fan cases 14, and the indoor unit 100b has two ducts 21 that connect the blower outlet 10 formed in the top panel 7 and the blower outlet 20. (see FIG. 17).

(Removal of blower 11)
FIG. 17 is a diagram showing a manner in which blower 11 according to Embodiment 2 is removed. Next, a manner in which the blower 11 is removed will be described. As shown in FIG. 17, the two fan cases 14 are slid on the front-side first rail 15a and the rear-side first rail 15b in the width direction of the housing 50 away from the motor 26, thereby causing the motor 26 to move. Separated from the two fans 13 . The two fan cases 14 slide on the front first rail 15a and the rear first rail 15b until they contact the second guide portion 23c of the second fan rail 17a.

(Removal of motor 26)
18 and 19 are diagrams showing how the motor 26 according to the second embodiment is removed. FIG. 18 is a diagram showing shaft 26a on one side of motor 26 taken out from fan case 14 on one side, and FIG. 19 is a diagram showing shafts 26a on both sides of motor 26 taken out from fan cases 14 on both sides. As shown in FIG. 18, the bolts (not shown) fixing the motor 26 to the motor base 19 are removed, and the motor base 19 is removed so that the shaft 26a of the motor 26 does not contact the two fans 13 and the two fan cases 14. As shown in FIG. rotate above. As a result, first, the shaft 26a on one side of the motor 26 is taken out from one fan case 14. As shown in FIG. When the motor 26 is further rotated, both shafts 26a of the motor 26 are taken out from the two fan cases 14 as shown in FIG.

After that, the motor 26 is rotated by suspending an eyebolt (not shown) provided on the motor 26 by human power or the power of equipment such as a lift. Thus, both shafts of the motor 26 are rotated sideways in a horizontal plane to remove it from the housing 50 . The fan case 14 is slid in the depth direction of the housing 50 when both shafts of the motor 26 are rotated. When the width of the housing 50 is narrow and it is difficult to remove the motor 26, if the fan case 14 is slid forward in the depth direction on the second rail 17a for the fan, a space for the motor 26 to rotate is maintained. is ensured.

As described above, even when the motor 26 has both shafts, the blower 11 is slid in the width direction of the housing 50 by the first rails 15 as in the first embodiment, and the second rails 17 are moved. , the blower 11 is slid in the depth direction. Also, the motor 26 is removed from the housing 50 by rotating both shafts of the motor 26 laterally in a horizontal plane. Accordingly, in the second embodiment as well, the degree of freedom in installing the blower 11 in the housing 50 is high.

It should be noted that the fan case 14 may be formed with a notch along the trajectory of rotation of both shafts. Thereby, when the motor 26 rotates, it is possible to prevent both shafts of the motor 26 from interfering with the fan case 14 . In this case, the notch is closed by the bell mouth 24 or a detachable plate. Also, the motor base 19 may be lubricated. This facilitates the manual rotation of the motor 26 . Furthermore, the bosses 27 of the two fans 13 may face the side on which the motor 26 is provided with respect to the shaft 26a. Thereby, the length of the shaft 26 a of the motor 26 can be shortened by the length of the boss 27 . Therefore, the work of removing both shafts of the motor 26 from the fan case 14 and the fan 13 is facilitated.

Note that the direction in which the two fan cases 14 are taken out is not limited to the front side in the depth direction, as in the first embodiment. For example, the side panel 6 may be formed with an opening through which the blower 11 is taken out, and the housing 50 may further have a detachable opening/closing panel that closes the opening formed in the side panel 6 . First, the opening/closing panel is removed while the fan case 14 is slid to the second guide portion 23c. After that, when the bell mouth 24 of the fan case 14 is removed, the fan 13 can be taken out from the opening formed in one side panel 6 .

1 Rear panel, 1a Inlet, 2 Heat exchanger, 3 Underframe, 3a Front panel, 4 Support, 5 Side panel, 6 Side panel, 7 Top panel, 8 Control box, 9 Drain pan, 10 Air outlet, 11 Blower , 12 motor, 13 fan, 14 fan case, 14a bolt, 15 first rail, 15a front first rail, 15b rear first rail, 16a upper surface, 16b upper surface, 17 second rail, 17a fan second rail for motor, 17b second rail for motor, 18a upper surface, 18b upper surface, 19 motor base, 20 blower outlet, 21 duct, 22 connection flange, 23 guide portion, 23a front side first guide portion, 23b Rear side first guide part, 23c second guide part, 24 bell mouth, 25 sealing material, 26 motor, 26a shaft, 27 boss, 30 thumb screw, 40 rail, 50 housing, 60 outdoor unit, 61 refrigerant circuit, 62 refrigerant pipe, 63 compressor, 64 outdoor heat exchanger, 65 outdoor blower, 66 expansion part, 67 channel switching device, 100 air conditioner, 100a indoor unit, 100b indoor unit.

Claims

a housing forming an outer shell;
a heat exchanger provided inside the housing for exchanging heat between air and a refrigerant;
a blower provided inside the housing for sending air to the heat exchanger;
The housing is
a pair of first rails for sliding the blower in the width direction of the housing;
and a pair of second rails for sliding the blower in the depth direction of the housing.
The housing is
a square underframe forming a bottom surface;
Four supports erected from four corners of the underframe;
a rear panel provided between the two pillars and constituting a rear surface;
a side panel that is provided between the two pillars and constitutes both sides;
a front panel that is provided between the two pillars and constitutes a front surface;
a top panel attached to the upper ends of the four posts,
The pair of first rails are
a front-side first rail that connects the two posts on the front panel side;
a rear-side first rail that connects two posts on the rear panel side and slides the blower in the width direction of the housing together with the front-side first rail,
The second rail is
The indoor unit of an air conditioner according to claim 1, wherein the first rail on the front side and the first rail on the back side are connected.
3. The indoor unit of an air conditioner according to claim 2, wherein the first rail on the front side, the first rail on the back side, and the second rail are lubricated.
4. The air conditioner according to claim 3, wherein the first rail on the front side, the first rail on the back side, and the second rail are lubricated by attaching a tape that suppresses surface friction. indoor unit.
The housing is
It is detachably provided on the front side first rail, prevents the blower from falling off when the blower is slid in the width direction of the housing, and prevents the blower from falling off when the blower is slid in the depth direction. The indoor unit of an air conditioner according to any one of claims 2 to 4, further comprising a front-side first guide portion that is removed from the first rail.
The housing is
6. The device according to any one of claims 2 to 5, further comprising a rear-side first guide portion provided on the rear-side first rail to prevent the blower from falling off when the blower is slid in the width direction of the housing. The indoor unit of the air conditioner according to item 1.
The housing is
7. The device according to any one of claims 2 to 6, further comprising a second guide portion provided on the second rail to prevent the blower from falling off when the blower is slid in the width direction of the housing. air conditioner indoor unit.
The side panel is formed with an opening for taking out the blower,
The indoor unit of an air conditioner according to any one of claims 2 to 7, wherein the housing further includes a detachable opening/closing panel that closes the opening formed in the side panel.
The blower is
fan case and
a fan provided in the fan case;
a boss who supports the fan;
The indoor unit of the air conditioner according to any one of claims 1 to 8, further comprising a motor that rotationally drives the fan.
the fan case and the motor are separated,
The second rail is
a pair of second fan rails for sliding the fan case in the depth direction;
The indoor unit of an air conditioner according to claim 9, further comprising a pair of second motor rails for sliding the motor in the depth direction.
further comprising a wire connecting the fan and the fan case;
11. The indoor unit of an air conditioner according to claim 10, wherein the fan is held inside the fan case by the wire when the fan and the motor are separated.
the motor has two shafts extending on both sides and each of which is provided with the fan;
12. The indoor unit of an air conditioner according to claim 10, wherein the both shafts are removed from the housing by being rotated laterally in a horizontal plane.
13. The indoor unit of an air conditioner according to claim 12, wherein the fan case is formed with a notch along a trajectory of rotation of the two shafts.
14. The indoor unit of an air conditioner according to claim 12, wherein the fan case is slid in the depth direction when the two shafts are rotated.
The air conditioner indoor unit according to any one of claims 9 to 14, wherein the boss is attached to the motor side.
The indoor unit of an air conditioner according to any one of claims 9 to 15, further comprising a motor base on which the motor is mounted and lubricated.
A blower outlet from which air is blown is formed in the upper part of the blower,
a duct connected to the blower outlet and through which air flows;
The indoor unit of an air conditioner according to any one of claims 1 to 16, further comprising a connection flange interposed between the blower outlet and the duct and detachably attached to the blower.