CN1834540A - Outdoor unit of air conditioner - Google Patents

Abstract

The present invention provides a small air conditioner outdoor unit capable of controlling a fan motor that always maintains the heat exchange power of a heat exchanger. For this air conditioner outdoor unit, almost the entire rear opening of the casing is closed by a planar outdoor heat exchanger, and a propeller fan and a rotary fan are accommodated in the heat exchanger chamber opposite to the front middle of the outdoor heat exchanger. Variable speed DC driven fan motor.

Description

Air conditioner outdoor unit

(1) Technical field

The invention relates to an air conditioner outdoor unit, in particular to an air conditioner outdoor unit with an improved frame structure.

(2) Background technology

In the previously proposed air conditioner outdoor unit, in order to form an upper opening, a rear opening, and a bottom opening, the frame is bent into a U-shape (horseshoe shape) from the front surface and the left and right sides constituting the frame, and is installed on one side. There is a front side panel with an air suction port, a top plate that closes the upper opening of the frame to form an upper part, a back panel that closes the back opening and is provided with a rear air suction port, and a bottom plate that closes the lower opening as the bottom plate of the frame, A heat exchanger bent into an L-shape separated from the back panel is arranged in the frame, and an AC-driven fan motor (fanmotor), compressor (compressor), and electrical parts box are also housed (patent Literature 1, 2).

This outdoor mechanism uses the L-shaped heat exchanger to suck in air from both sides of the side air inlet and the rear inlet of the outdoor unit, so that the ventilation resistance can be reduced. However, since the heat exchanger is opposite to the side air inlet of the frame, Therefore, the frame becomes larger, so there is a problem of increasing the size of the outdoor unit. In addition, on the contrary, because the suction part is large, it is easily affected by the external wind, and it is difficult to maintain the heat exchange amount of the heat exchanger at all times. best value. In addition, since an AC-driven fan motor is used, it is impossible to accurately adjust the air volume in response to changes in the air volume and temperature around the heat exchanger. Therefore, additional measures such as adjusting the opening degree with an electronic expansion valve are adopted.

In addition, in order to minimize the influence of external wind, if the suction part is provided only on the back and a flat heat exchanger is used, the ventilation resistance in the outdoor unit will increase, so it is difficult to The fan motor is precisely controlled to maintain the heat exchange power of the heat exchanger at all times.

[Patent Document 1] Japanese Patent Laid-Open No. 3-99133

[Patent Document 2] Japanese Patent Laid-Open No. 2001-99448

(3) Contents of the invention

In view of the above-mentioned problems, an object of the present invention is to provide an air conditioner outdoor unit that can reduce the size of the housing structure and can always maintain the heat exchange power of the heat exchanger.

In order to achieve the above object, for the air conditioner outdoor unit in the present invention, the frame body is composed of a front side panel that is bent into a U-shape forming its front surface and left and right sides, a top plate forming its upper surface, and a bottom plate forming its bottom surface. It is characterized in that the inside of the frame is divided into a heat exchanger chamber and a mechanical chamber by a partition, and a planar outdoor heat exchanger constituting the back of the frame is arranged in the heat exchange chamber. Near the middle of the front of the outdoor heat exchanger, a propeller fan and a variable-speed DC-driven fan motor for driving the propeller fan are arranged. A compressor is arranged in the mechanical room, and a The upper part is provided with an electrical parts box, which accommodates electrical control parts for controlling the revolutions of the fan motor and the compressor, and an air outlet is opened on the front part of the front side panel. A bell mouth is integrally formed around the outlet, and both front ends of the left and right side parts of the front side panel are bent toward the back side to cover the side surfaces outside the left and right ends of the outdoor heat exchanger, and only the front side The front surface of the panel and the lower parts of the left and right sides are fixed to the front edge and the left and right side edges of the bottom plate by screws.

According to the air conditioner outdoor unit in the present invention, it is possible to provide a compact air conditioner outdoor unit capable of maintaining the heat exchange power of the heat exchanger at all times.

(4) Description of drawings

Fig. 1 is a front perspective view of an outdoor unit of an air conditioner according to an embodiment of the present invention.

Fig. 2 is a rear perspective view of the outdoor unit of the air conditioner according to the embodiment of the present invention.

Fig. 3 is an exploded perspective view of an outdoor unit of an air conditioner according to an embodiment of the present invention.

Fig. 4 is a front perspective view of a front panel used in the outdoor unit of the air conditioner according to the embodiment of the present invention.

Fig. 5 is a rear perspective view of a front panel used in the outdoor unit of the air conditioner according to the embodiment of the present invention.

(Description of component symbols)

1. Air conditioner outdoor unit

2. Frame

3. Air outlet

4. Front side panel

4a. Front surface

4b. Bell mouth

4c. Left face

4c1. Left bending part

4d. Right face

4d1, right bending part

5. Upper opening

6. Top plate

7. Back opening

8. Outdoor heat exchanger

9. Lower opening

10. Bottom plate

11. Partition

12. Heat exchange chamber

13. Mechanical room

15. Propeller fan

16. Fan motor

17. Compressor

18. Electrical parts box

(5) specific implementation

Hereinafter, an embodiment of the outdoor unit of the air conditioner in the present invention will be described with reference to the drawings.

Fig. 1 is a front perspective view of an air conditioner outdoor unit in the present invention, Fig. 2 is a rear perspective view thereof, and Fig. 3 is an exploded perspective view thereof.

As shown in FIGS. 1 to 3 , for the air conditioner outdoor unit 1 in this embodiment, the frame body 2 is composed of a front side panel bent into an approximately U-shape that is provided with an air outlet 3 and constitutes the front surface and the left and right side parts. 4. It is composed of a top plate 6 that closes the upper opening 5 located on the upper part of the front side panel 4 to form the upper part, and a bottom plate 10 that forms the bottom part.

Furthermore, the inside of the housing 2 is divided into a heat exchange chamber 12 and a machine chamber 13 by a partition plate 11 bent into an arc shape.

In the heat exchange chamber 12, a planar outdoor heat exchanger 8 formed by passing a plurality of aluminum fins 8a through refrigerant tubes (heat transfer tubes) 8b closes almost the entire rear opening of the frame body 2. The state of 7 is provided on the back side of the bottom plate 10. In addition, near the middle of the heat exchange chamber 12, a propeller fan 15 mounted on a motor (motor) supporting base (base) 14 and a direct current fan with variable rotation speed are provided. Driven fan motor 16.

The reason why the outdoor heat exchanger is formed in a planar shape is that the horizontal size of the casing can be reduced, and no bending or other processing is required. In addition, by providing the suction port of the frame only on the back side, the air flow due to external wind can be reduced. The temperature and air volume changes inside the outdoor unit caused by the influence are suppressed to a minimum.

In addition, the reason for using a DC-driven fan motor is that, compared with conventional single-phase AC motors, the rotation can be precisely controlled by electronic control, so that it can cope with changes in the air volume and increase in air pressure inside the machine.

4 and 5 are a front perspective view and a rear perspective view of a front panel used in the air conditioner outdoor unit of the present invention.

As shown in Fig. 4 and Fig. 5, on the front side panel 4 constituting the main part of the frame body 2, an air outlet 3 is opened on the front surface 4a, and a bell-shaped body is integrally formed around the air outlet 3. In the mouth 4b, the two front ends on the back side of the U-shaped left side part 4c and right side part 4d are bent inwardly (back opening side), thereby forming a left side bent part 4c1 and a right side bent part 4d1, and These two bent portions 4c1 and 4d1 cover the outer sides of the left and right end plate portions of the outdoor heat exchanger 8 . In addition, with respect to the front side panel 4, only the bottom plate 10, the front surface 4a and the left and right sides 4c, 4d of the front side panel 4 are fixed with screws, and the left side bending part 4c1 and the right side bending part 4d1 bent toward the back side are fixed. No screw fixing portion is formed. In addition, the right side 4e constitutes the side surface of the machine room 13, and a wiring terminal (connector: connector) mounting part 4d2 on the indoor unit side inclined inward is integrally formed in the middle part thereof, and a connecting pipe fitting 4d2 is formed in the lower part thereof. The opening 4d3 from which the valve protrudes is connected.

In this way, the bell mouth 4b is integrally formed on the front side panel 4. In addition, the left and right side parts 4c, 4d are also provided to cover the outside of the left and right end plates of the outdoor heat exchanger 8, so except for the surface (back) of the heat exchanger, In addition, the entire side can be formed by bending a single metal plate. Compared with the structure assembled from different side parts, there is no seam, the material utilization rate and operability are improved, and the operability of mounting on the base plate is also improved. improve.

In addition, when the front side panel 4 is mounted on the base plate 10, the front surface 4a, left and right sides 4c, 4d are screwed to various parts of the lower end edge 4e of the front side panel 4, and the back side is not screwed. The reason for this is that when the outdoor unit is installed, the rear side is often installed close to the house. Even if the outdoor unit is installed close to the wall of the house, since there is no screw fixing part on the rear side, it is difficult to check and maintain. When waiting for service, the integrated front side panel 4 can be easily removed.

In addition, for the manufacture of the front side panel 4, the air outlet 3 is punched out by stamping a flat metal plate in a flat state, and the bell mouth 4b is protruded inward by necking molding around the periphery, and Punch out the installation part 4d2 of the electric wiring terminal and the opening part 4d3 through which the pipe connection valve protrudes, etc., and perform bending or other molding, so that it is moved to the outdoor unit manufacturing line in a flat state and stacked in advance, and then placed on the outdoor unit. In the assembly and manufacturing process of , the bending angles of the left and right side surfaces 4d and 4e with respect to the front surface 4a are formed into obtuse angles of 90 degrees or more on both sides. In this way, the left and right side surfaces 4c, 4d can be attached to the outdoor unit in a state slightly opened outward with respect to the front surface 4a.

Therefore, when the front side panel 4 is installed on the base plate 10 equipped with components such as the compressor 17, the outdoor heat exchanger 8, and the propeller fan 15, because the fronts of the left and right side parts 4c, 4d can be slightly opened. It can be assembled in this way: after the front side panel 4 is inserted inside, the slightly opened left and right side parts 4c, 4d are pressed inward to connect with the bottom plate 10, and the bottom plate 10 The front surface and sides are fixed with screws.

On the other hand, in the machine room 13, main parts such as a compressor 17 disposed on the front end side of the outdoor heat exchanger 8, a capillary tube (not shown) as a constricting device, and an upper part are accommodated. The electrical control box 18 accommodates electrical control components etc. which control the rotation speed of the direct current drive fan motor 16 and the compressor 17, etc. As shown in FIG.

Also, the reference numeral 3a in the figure is the blowing grill (grill) installed on the opening front part of the air outlet 3, and the reference numeral 19 is the wiring terminal installation part 4d2 covering the right side part of the outdoor unit and the opening of the piping connection valve. The compact valve cover (packed valve cover) of part 4d3, symbol 20 is installed on the outside surface of outdoor heat exchanger 8, and the radiator fin protection device (fin guard) that forms lattice-like vent hole with synthetic resin.

In the outdoor unit 1 of the air conditioner having the above-mentioned structure, the outdoor heat exchanger 8 is formed in a planar shape that closes the back opening 7. Since the outdoor heat exchanger is not disposed on the side side, the lateral dimension can be reduced, and the casing can be miniaturized. In addition, since no processing such as bending is required, manufacturability is improved and reliability is also improved.

In addition, since the outdoor heat exchanger has a planar shape and takes in outdoor air only through the back side, the ventilation resistance increases compared with the structure using an L-shaped heat exchanger, but since the outdoor heat exchanger is adopted according to the operating conditions of the outdoor unit, The DC drive motor that uses the IC (Integrated Circuit; integrated circuit) drive circuit to precisely control the speed of the fan motor, so that the air volume can be controlled so that the outdoor heat exchanger is always in a state of high efficiency. heat exchange.

In addition, by using a DC drive motor, the air volume can be controlled even with a capillary tube with a fixed opening, so that the flat outdoor heat exchanger can always perform heat exchange in an optimal state without adjusting the opening, and Compared with the expansion valve, an inexpensive capillary tube without movable parts can be used, so that the reliability of the product is improved, and the manufacturing cost (manufacturers' cost) is greatly reduced.

As described above, with the air conditioner outdoor unit in this embodiment, the air volume of the fan (fan) is accurately controlled by using the planar outdoor heat exchanger provided only on the back and the DC-driven fan motor with variable rotation speed. , so that the heat exchange power of the heat exchanger can be maintained at all times, and a compact and highly reliable air conditioner outdoor unit can be realized.

Claims (1)

1, a kind of air-conditioner outdoor unit, framework is formed by the front panel that constitutes the approximate コ word shape of being bent into of its front surface and left and right side, the base plate that constitutes the top board of its upper surface and constitute its bottom surface, it is characterized in that,

The inside of described framework is divided into heat exchanger chamber and Machine Room by dividing plate,

In described heat-exchanging chamber, be provided with the plane outdoor heat converter that constitutes the described framework back side, near the centre, the place ahead of described outdoor heat converter, the blower motor that is provided with screw-type ventilator and drives the variable DC driven of the rotating speed of this screw-type ventilator

In described Machine Room, be provided with compressor, and be provided with the electric parts case, contain the electrical control part of the revolution of described blower motor of control and described compressor in this electric parts case on the top of this Machine Room,

Front face at described front panel offers blow-off outlet, has formed bellmouth around this blow-off outlet, two front ends of the left and right sides face of described front panel to the rear side bending and cover described outdoor heat converter about the side in the end outside,

Have only the front surface of described front panel and the bottom of left and right sides face to utilize screw to be fixed on the front edge and edge, the left and right sides of described base plate.

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