JPS6237061Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner, and more particularly to a lead wire structure for an air conditioner in which a fan motor is vibration-proofly supported on a main body casing via a mounting base.

In general, an air conditioner has a heat exchanger and a fan installed inside a main body casing that has an inlet and an outlet, and the air sucked in from the inlet by the fan is exchanged with the heat exchanger, and then the air is passed through the outlet. It is designed to blow out air from the air.

Conventionally, when the motor that rotationally drives the fan is mounted and supported on the main body casing, the main body casing has an opening that is approximately hat-shaped in cross section and has a diameter slightly larger than the outer diameter of the motor at the center of the mounting surface. By fixing the mounting base and mounting the motor on the mounting surface of the mounting base via a mounting piece with a gap between the outer periphery and the opening of the mounting surface, vibrations of the motor can be removed from the mounting base. A structure is adopted to suppress the generation of vibration noise by preventing it from being transmitted to the main body casing as much as possible through the vibration.

By the way, when drawing out the lead wires of the motor in such a device, as shown in FIG. It is conceivable to draw it out through the inside of the mounting base c from the gap d formed between the surface c _{1 and the opening c 2 .} Moreover, in that case, in order to prevent the lead wires a from shifting, a notch e is provided in a part of the periphery of the opening _c2 , and the bundle covered with the protective cover f is formed in the notch e. It is conceivable to sandwich the lead wires a between the outer periphery of the motor b and the opening _c2 .

However, in this case, since the bundle-shaped leads a are sandwiched between the outer periphery of motor b and the opening _c2 , the vibrations of motor b are transmitted to the mounting base c via lead wires a. In particular, there is a problem in that vibration noise twice the motor current frequency, so-called 2f sound, is transmitted to the main body casing and generates a harsh noise.

In view of this, the present invention has been developed to provide an air conditioner in which a fan motor is supported with vibration isolation, when the lead wire of the motor is pulled out through the inside of the mount from the gap between the outer periphery of the motor and the opening in the mounting surface of the mount. By creating a structure in which vibrations of the motor are not transmitted to the mounting base through the lead wires, while preventing the lead wires from sagging or interfering with the fan, vibration noise caused by transmission of motor vibrations to the main body casing, especially on the 2F
The purpose is to effectively reduce sound.

In order to achieve this objective, the configuration of the present invention includes a main body casing having an inlet and an outlet.
A fan is provided that is rotationally driven by a motor and sucks air through the suction port, exchanges heat with a heat exchanger, and then blows the air out of the air outlet, and the main body casing has a mounting base that supports the motor; and the mounting base is formed with an opening having a diameter larger than the outer diameter of the motor, and the motor is mounted to the mounting base via a mounting piece with a gap provided between the outer circumference of the motor and the opening. and a lead wire of the motor is drawn out through the inside of the mounting base from the gap, and a locking portion into which the lead wire is inserted and locked is formed at the periphery of the opening of the mounting base. It is characterized by the fact that As a result, when the motor lead wire is passed through the gap between the outer circumference of the motor and the opening of the mounting base, the lead wire is inserted into the locking part and locked, so that the lead wire is separated from the motor. This locks and holds the motor to prevent vibrations from being transmitted to the main body casing via the lead wires.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Figures 1 and 2 show an embodiment in which the present invention is applied to a ceiling-suspended indoor unit A of a heat pump type air conditioner. A suction port 2 is provided at the center of the lower surface 1a of the main casing 1, and a front surface 1a of the main casing 1 is provided with a suction port 2.
B, and both left and right side surfaces 1c, 1c are provided with air outlets 3a, 3b, 3c, respectively.

A mixed flow fan 4 is disposed in the center of the main body casing 1 in correspondence with the suction port 2. The mixed flow fan 4 includes a drive motor 5 supported on the top plate 1d of the main body casing 1, and a plurality of blades 6a, 6a... connected to the drive shaft 5a of the drive motor 5 to generate mixed flow acceleration. It consists of an impeller 6 having
Air is sucked in through the suction port 2 and fed diagonally outward in three directions.

Further, the mixed flow fan 4 inside the main body casing 1
On the downstream side, front and left and right side heat exchangers 7a, 7b and 7c made of cross-fin coils are connected to the front and left and right side air outlets 3a, 3b and 3, respectively.
It is supported and disposed on the top plate 1d so as to face the top plate 1d. Each of the heat exchangers 7a, 7b, 7c is
Tube sheets 8a and 8b respectively disposed at both ends, refrigerant tubes 9 supported through the tube sheets 8a and 8b,
A large number of fins 10 are fitted into and supported by the refrigerant pipes 9.
It is made up of... Adjacent heat exchangers 7a, 7
b, 7c are connected by blind plates 8c, 8 between tube plates 8a, 8b.
c, and the refrigerant pipes 9 are connected by connecting pipes 11 to form a series of refrigerant pipes 12. Both ends of the refrigerant pipe 12 are led out to the end on the back side 1e of the main body casing 1 of the right heat exchanger 7c, and one end is connected to a connecting pipe 13.
a, and the other end thereof is connected to a connecting pipe 13b via a capillary tube 14, and both connecting pipes 13a, 13b penetrate the back surface 1e of the main body casing 1 and the wall W, and are led out to the outside. unit (not shown).

As described above, after the air sucked in from the suction port 2 by the mixed flow fan 4 is heat-exchanged by each heat exchanger 7a, 7b, and 7c, it is sent from each outlet port 3a, 3b, and 3c to three directions: front, right and left sides. A ceiling-suspended indoor unit A is configured to emit air.

In addition, 15 is a suction grill attached to the suction port 2,
16 and 17 are horizontal blades and vertical blades rotatably provided at each outlet 3a, 3b, 3c, and by changing the direction of the blades 16, 17, air can be removed from the outlet 3a, 3b, 3c. The direction of the air being blown out can be adjusted. Further, 18 is a drain pan, and a drain pipe (not shown) is connected to the drain pan 18, so that the drain accumulated in the drain pan 18 is drained outside through the drain pipe. . 19 is an electrical parts box, 20 is a terminal board for installation field wiring, and 21 is a refrigerant heater.

As a feature of the present invention, as shown in detail in FIG. 3, on the upper side of the total peripheral surface of the motor 5 (the side opposite to the impeller 6), there are a plurality of horizontally protruding outwards (in the figure, four ) mounting pieces 22 are integrally provided at equal intervals in the circumferential direction. On the other hand, in a portion of the top plate 1d of the main body casing 1 corresponding to the motor 5, a mounting base 23 having a substantially hat-shaped cross section and having a flange portion 23a on the periphery is provided with a mounting base 23 having a flange portion 23a on the top plate 1d. 24, and the mounting base 23 is
An opening 23c having a diameter slightly larger than the outer diameter of the motor 5 is formed in the center of the mounting surface 23b. Thus, the motor 5 has a gap 28 between the outer periphery of the motor 5 and the opening 23c, and attaches the mounting pieces 22 to the mounting surface 23b around the opening 23c of the mounting base 23 via the anti-vibration rubber 25. It is attached by fixing with bolts 26 and nuts 27, and the motor 5 is indirectly supported on the mounting base 23 by the mounting pieces 22... and anti-vibration supported by the interposition of the anti-vibration rubber 25. That's what I do.

Further, the lead wires 29 of the motor 5 are bundled together and covered with a protective cover 30 made of flexible resin, and are pulled out from the gap 28 through the inside of the mounting base 23 and connected to the terminal board 20. This is to prevent the lead wires 29 from hanging downward and interfering with the impeller 6 of the mixed flow fan 4.

Furthermore, the mounting surface 23b of the mounting base 23
A part of the periphery of the opening 23c of the
The lead wires 29 covered by the protective cover 30 are inserted into the gap 28 through the insertion groove 31a of the protective cover 30, and the lead wires 29 are inserted into the gap 28 through the insertion groove 31a of the protective cover 30. The lead wires 29 are inserted into the gap 28 through the insertion groove 31a of the protective cover 30. The lead wires 29 are inserted into the gap 28 through the insertion groove 31a of the protective cover 30.
After the connector is forcibly fitted into the locking groove 31b, it is held in the locking groove 31b so as not to come out.

Therefore, in the embodiment described above, the motor 5 for rotationally driving the mixed flow fan 4 is connected to the top plate 1d of the main body casing 1 via the mounting base 23 having the above-described shape.
Since the motor 5 is mounted and supported in a vibration-proof manner, the vibration of the motor 5 is prevented as much as possible from being directly transmitted to the main body casing 1 via the mounting base 23, and the generation of vibration noise is suppressed.

Further, the lead wires 29 of the motor 5 are drawn out through the inside of the mount 23 from the gap 28 between the outer periphery of the motor 5 and the opening 23c of the mount 23 using the vibration-proof support structure as described above. Therefore, it is possible to effectively prevent the lead wires 29 from hanging down and interfering with the mixed flow fan 4 while making effective use of space.

Furthermore, when the lead wires 29 pass through the gap 28, they are fitted into and locked in the locking portion 31 provided around the opening 23c of the mounting base 23.
9 does not come out from the locking portion 31 into the gap 28 and is securely held at a distance from the motor 5, so that the vibrations of the motor 5 are not transmitted to the mounting base 23 via the lead wires 29... , it is possible to further reduce vibration noise, and in particular to reliably prevent abnormal noise caused by 2F sound. Now, specifically, in the mounting structure of the motor 5 as described above, the lead wires 29...
When the frequency characteristics are measured when held as shown in the figure (example of the present invention) and when held as shown in Fig. 5 (comparative example), the measurement results shown in Figs. 4 and 6 are obtained, respectively. Ta. In the frequency characteristics of the example of the present invention shown in FIG. 4, the 2f sound is lowered by more than 10 [dB] compared to the comparative example shown in FIG. 6, and it can be seen that the effect of reducing the 2f sound is large.

In the above embodiment, the present invention was applied to a ceiling-suspended indoor unit A of a heat pump type air conditioner having air outlets on three sides.
For example, it can be applied to various indoor units such as those having only one air outlet, and wall-mounted units in which the fan motor is supported on the main body casing other than the top plate. Furthermore, the present invention is not limited to separate type air conditioners, but can also be applied to integrated type air conditioners. It goes without saying that fans other than the mixed flow fan 4 can also be used.

Further, as for the shape of the locking portion 31, various shapes other than the L-shape as in the above embodiment can be adopted, and in short, any shape that allows the lead wires 29 to be inserted and locked may be used.

As explained above, according to the present invention, air is rotated by a motor in a main body casing having an inlet and an outlet, and the air sucked in through the inlet is heat-exchanged with a heat exchanger, and then the air is sent from the outlet. A blowing fan is provided, the main body casing has a mounting base for supporting the motor, and the mounting base is formed with an opening having a diameter larger than the outer diameter of the motor, and the motor is configured to: The air conditioner is attached to the mounting base via a mounting piece with a gap provided between the outer periphery of the motor and the opening, and a lead wire of the motor is drawn out from the gap through the inside of the mounting base, A locking portion into which the lead wire is inserted and locked is formed on the periphery of the opening of the mounting base, so that the fan motor can be supported in a vibration-proof manner on the main body casing, and the lead wires of the motor can be prevented from sagging and the fan motor can be secured. While preventing interference with the lead wire, vibrations of the motor are not transmitted to the main body casing via the lead wire, and generation of abnormal noise due to 2F sound can be effectively reduced.

[Brief explanation of the drawing]

Figures 1 to 3 show embodiments of the present invention;
The figure is a plan view from above with the top plate removed, Figure 2 is a vertical sectional view, Figure 3 is a plane view showing how the motor is attached to the mounting base, and Figure 4 is an example of the present invention. FIG. 5 is a plan view of a main part showing a comparative example, and FIG. 6 is a frequency characteristic diagram of a comparative example. 1...Body casing, 2...Suction port, 3a~
3c...Air outlet, 4...Different flow fan, 5...Motor, 22...Mounting piece, 23...Mounting stand, 23c...
...Opening, 28...Gap, 29...Lead wire, 3
1...Locking part.

Claims (1)

[Scope of utility model registration request] Air is rotated by a motor 5 and sucked into the main body casing 1 having an inlet 2 and an outlet 3a through the inlet 2, and the air is transferred to a heat exchanger 7a...
The main body casing 1 has a mounting base 23 for supporting the motor 5, and the mounting base 23 is provided with a fan 4 that blows air from the air outlet 3a after exchanging heat. The motor 5 is mounted on the mounting base 23 via the mounting pieces 22 with a gap 28 provided between the outer periphery of the motor 5 and the opening 23c. This is an air conditioner in which the lead wires 29 of the motor 5 are drawn out from the gap 28 through the inside of the mounting base 23, and the opening 2 of the mounting base 23
An air conditioner characterized in that a locking portion 31 into which the lead wires 29 are inserted and locked is formed on the periphery of the air conditioner 3c.