JP2940735B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling machine such as a spot cooler in which necessary components such as an evaporator, a condenser, a compressor and a blower unit are housed in a single exterior body.

[0002]

2. Description of the Related Art As disclosed in Japanese Utility Model Unexamined Publication No. 1-106832, for example, a conventional air conditioner of this type includes a refrigerant circuit including a compressor, a condenser, an evaporator, and the like.
Evaporator blower fan, condenser blower fan, equipped with a blower unit composed of a motor and the like in the outer body, and the blower unit is disposed between the evaporator and the condenser,
Both fans were driven by a single motor.

[0003]

By the way, in the above-mentioned air conditioner, a sirocco fan was used for the evaporator fan, but a propeller fan was used for the condenser fan. When air is exhausted to the outside or far through the exhaust duct, the exhaust duct increases the ventilation resistance, and the propeller fan tends to have insufficient airflow, reducing the amount of air passing through the condenser and reducing the condenser's condensation capacity. It was difficult to secure enough.

[0004] Therefore, if a sirocco fan, which blows more air than a propeller fan, is used for the condenser blower fan, it is possible to sufficiently secure the condenser's condensation performance even when an exhaust duct is used. Is located in a space where the air flow is small between the fan case for the evaporator and the fan case for the condenser, and there is a problem that the cooling of the motor becomes insufficient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and uses a sirocco fan as a blower fan for a condenser so as to ensure efficient condensation of the condenser while efficiently cooling the motor. It is intended to be.

[0006]

According to the present invention, there is provided a refrigerant circuit including a compressor, a condenser, an evaporator, etc., a blower fan for an evaporator built in a fan case for an evaporator, and a condenser built in a fan case for a condenser. A cooling fan in which a blower unit, a blower unit including motors for driving both blower fans, and the like are provided in an exterior body, and the blower unit is disposed between an evaporator and a condenser. Using a fan, the main disk of the condenser blower fan is provided with an intake opening, while the condenser fan case is provided with a ventilation hole in the motor side end plate, and the outside air flowing into the space in which the motor is installed, In this configuration, the air is sucked into the condenser fan case from the ventilation hole of the motor-side end plate.

Further, according to the present invention, there is provided a refrigerant circuit including a compressor, a condenser, an evaporator, etc., a blower fan for an evaporator built in a fan case for an evaporator, a blower fan for a condenser built in a fan case for a condenser, A cooling unit including a blower unit configured by a motor or the like that drives both blower fans is provided in the outer package, and a sirocco fan is used as the blower fan for the condenser in a cooling device in which the blower unit is disposed between an evaporator and a condenser. While a main disk of the condenser blower fan is provided with an intake opening, a vent hole is provided in a motor side end plate of the condenser fan case, and a space in which the motor is installed and a space in which an evaporator is installed. And a part of the cooling air cooled by the evaporator is caused to flow into the space where the motor is installed through the communication passage, and It is configured to be sucked into the condenser fan inside the case through the vent holes of the side end plate.

[0008]

With this configuration, the air flow rate of the air passing through the condenser can be increased as compared with that using the propeller fan, and the condenser capacity can be increased, and the atmosphere around the motor can be reduced. Then, the air is sucked into the condenser fan case from the ventilation hole of the motor side end plate, and the suction action allows the outside air to flow into the space where the motor is installed, and the motor is forcibly cooled by the flow of the air.

In the cooling device according to the second aspect, a part of the cooling air cooled by the evaporator flows into the space where the motor is installed through the communication passage, so that the temperature of this space is reduced, and the effect is further improved. The motor can be cooled efficiently.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the drawing, reference numeral 1 denotes a vertically long box-shaped exterior body, which can be detachably attached to a bottom plate 3 having a plurality of casters 2, 2, left and right side plates 4, 4 and front and rear panels 5, 6. The top body 7 can be opened by removing the top board 7. Numeral 8 denotes a partition plate provided at an intermediate height position in the exterior body 1. The partition plate 8 has a high step at the front portion and a lower step at the rear portion.
Thus, the inside of the exterior body 1 is vertically divided.

A machine room A containing a compressor 9, a drier 10, and an accumulator 11 is formed below the lower portion 8A of the partition plate 8. A drain tank 12 is provided below the upper section 8B.
Is formed in a space B for storing a tank, which is open at the front face. The machine room A is separated from the tank housing space B by a partition plate 13, and the back surface of the machine room A is covered with a removable back plate 14.

Above the partition plate 8, a heat exchange chamber C containing an evaporator 15, a condenser 16 and a blower unit 17 is formed, and the compressor 9, the drier 10, the accumulator 11, and the evaporator 15 are formed. And the condenser 16 constitute a refrigerant circuit. Further, the evaporator 15 and the condenser 16
Are arranged at a distance from each other at the front and rear ends of the heat exchange chamber C, and the blower unit 17 is arranged between the evaporator 15 and the condenser 16. Reference numeral 18 denotes a drain receiver disposed below the evaporator 15. Drain water received by the drain receiver 18 from the evaporator 15 is dropped and stored in the drain tank 12.

At the front end of the bottom plate 3, the drain tank 1 accommodated in the tank accommodating space B when the equipment is moved.
A receiving plate 19 for preventing the 2 from jumping out is mounted. The receiving plate 19 has an upwardly projecting portion 19A formed at the tip thereof, and a horizontal receiving surface portion 19B connected to the upwardly projecting portion 19A. The receiving surface portion 19B and the upwardly projecting portion 19A define the drain tank 12 with the upper surface. The front bottom surface is received so that the drain tank 12 can be stably accommodated.

The front panel 5 has an upper end engaged with a front edge of the top plate 7 and a lower end provided with a plurality of decorative screws 2.
It can be easily removed by removing the cosmetic screws 20 and 20 at 0 and 20 on both side plates 4 and 4. A large number of slit-shaped suction ports 21 and 21 is provided, and a detachable filter 22 is provided inside.

The rear panel 6 has a lower end locked by a lock 23 mounted on the bottom plate 3 and an upper end formed by a pair of left and right magnets (not shown).
, So that it can be easily attached and detached. After this, the panel 6 is connected to the condenser 16
A large number of slit-shaped suction ports 24, 24
And a filter 25 which is removable like the front panel 5 is provided on the inner surface side of the suction ports 24, 24.

The blower unit 17 includes an evaporator fan case 26, an evaporator blower fan 27 built in the evaporator fan case 26, and a condenser fan case 2.
8, a condenser blower fan 29 built in the condenser fan case, and a single motor 30 for driving both the blower fans 27, 29.
It is made into a unit using a plurality of connecting tools 31, 31 provided between 6, 28. The blower unit 17 is incorporated so as to be able to be taken in and out of the heat exchange chamber C from the upper surface opening of the exterior body 1 with the top plate 7 removed, and has a blower fan 27 for the evaporator and a blower for the condenser. The fans 29 both use sirocco fans.

As shown in FIG. 3, the evaporator fan case 26 has a substantially pentagonal shape when viewed from the front side without one of the lower corners. Is a space in which the evaporator 15 is installed (hereinafter, referred to as an evaporator installation space) and the blowing unit 1
A communication passage 32 communicates with a space A in which the motor 30 is installed (hereinafter referred to as a motor installation space).

The condenser fan case 28 includes a motor-side end plate 28A and a condenser-side end plate 28 having a suction port 33.
B and a vortex chamber member 28C made of polystyrene foam interposed between both end plates 28A and 28B. A part of the outer peripheral surface of the motor 30 is provided at substantially the center of the motor-side end plate 28A at a substantially equal interval X. A cylindrical recess 34 with a bottom is formed integrally therewith, and a plurality of ventilation holes 35, 35 arranged substantially concentrically with respect to the motor shaft 30A are formed in the bottom wall of the recess 34. It is. Further, the motor shaft 30A
A recess 36 is formed in the main disk 29A of the blower fan 29 for the condenser, which is axially attached to the recess, into which the tip of the recess 34 of the motor-side end plate 28A enters.
A plurality of intake openings 37, 37 having a diameter substantially larger than that of the vent hole 35 are provided at positions substantially corresponding to the air holes 35, 35, and the plurality of intake openings 37, 37 are substantially arranged with respect to the motor shaft 30A. They are arranged concentrically.

Reference numeral 38 denotes an electrical component mounting plate disposed between the two fan cases 26 and 28 above the motor 30. On the electrical component mounting plate 38, a capacitor for the motor 30, a capacitor for the compressor 9, and the like. Control electrical parts 3
The electric component mounting plate 38 is supported by a pair of supports 40, 40 mounted on opposing surfaces of the fan cases 26, 28. 4 in FIGS. 1 and 5
Reference numerals 1 and 41 denote ventilation holes provided in the left and right side plates 4 and 4, respectively.
It is provided at substantially the same height as 39 and at a position facing the motor installation space A. 42 is an evaporator fan case 26
A ventilation duct 43 connected to an evaporator outlet (not shown) leading to the inside, and an exhaust duct 43 connected to a condenser outlet (not shown) leading to the condenser fan case 28.

In the above configuration, the flow of air will be described with reference to FIG. First, when the air conditioner is operated, the air sucked from the suction port 21 of the front panel 5 is discharged from the evaporator 15.
The cooling air flows into the evaporator fan case 26 and is discharged from the blower duct 42. On the other hand, the air sucked from the suction port 24 of the rear panel 6 passes through the condenser 16 to take heat of the condenser 16, and the air after the heat exchange flows into the condenser fan case 28, and flows through the exhaust duct 43. Exhausted through.

Here, a plurality of intake openings 37, 37 are provided in the main disk 29A of the blower fan 29 for the condenser, and a plurality of ventilation holes 35 are formed in the bottom wall of the concave portion 34 of the motor-side end plate 28A. , 35 are provided, the heat of the atmosphere of the motor 30 flows to the space X between the motor 30 and the concave portion 34,
It flows into the condenser fan case 28 through the ventilation holes 35. When air is drawn into the space X between the motor 30 and the concave portion 34, outside air flows into the motor installation space 1 from the ventilation holes 41, 41 provided in the side plate 4, and is cooled by the evaporator 15. A part of the cooling air flows in through a communication passage 32 formed between the motor installation space A and the evaporator installation space A.

According to this embodiment, the blower fan 2 for the condenser
9, a sirocco fan is used, so that the air volume of the air passing through the condenser 16 is increased as compared with the case using a propeller fan, and even when the exhaust duct 43 is connected, the condensation capacity of the condenser 16 is sufficiently increased. Can be secured. A plurality of ventilation holes 35, 35 are provided in the motor-side end plate 28A of the condenser fan case 28, while the condenser blower fan 2 is provided.
Since a plurality of intake openings 37, 37 are provided in the main disk 36 of No. 9, the atmosphere around the motor 30 is sucked into the condenser fan case 28 from the ventilation holes 35, 35, and the suction action causes the motor installation space. Outside air flows into (a), and the motor 30 is forcibly cooled by the flow of the air.

Since the communication passage 32 for connecting the motor installation space A and the evaporator installation space A is provided in the heat exchange chamber C, a part of the cooling air cooled by the evaporator 15 is transferred to the communication passage 32. Through the motor installation space a
The air temperature in the motor installation space A decreases. The air whose temperature has dropped in this way passes through the periphery of the motor 30 and is sucked into the condenser fan case 28 from the ventilation holes 35 of the motor-side end plate 28A, so that the motor 30 is cooled more satisfactorily.

The end of the motor 30 enters the recess 34 formed in the motor-side end plate 28A of the condenser fan case 28, and the main disk 2 of the condenser blower fan 29
9, the recess 3 of the motor-side end plate 28A
4, the front and rear dimensions of the blower unit 17 are not so large even if the condenser blower fan 29 is a large sirocco fan with long blades, and there is no fear of inviting an increase in the size of the equipment.

Further, an electric component mounting plate 38 on which control electric components 39 and 39 such as a condenser for the motor 30 and a condenser for the compressor 9 are mounted is disposed above the motor installation space A. While cooling the motor 30,
The control electrical components 39, 39 can be cooled, and the surplus space can be used effectively.

[0026]

As described above, the air conditioner of the present invention is constructed as described above, so that the air volume of the air passing through the condenser is increased as compared with the air conditioner using the propeller fan, and the condensing capacity of the condenser is increased. In addition to ensuring sufficient space, the atmosphere around the motor is sucked into the condenser fan case, allowing outside air to flow into the space where the motor is installed, and forcing the motor to cool with this flow of air, ensuring condensation performance. The motor temperature can be prevented from rising.

According to the second aspect of the present invention, a part of the cooling air cooled by the evaporator flows into the space where the motor is installed through the communication passage, so that the temperature around the motor is reduced, and the effect is further improved. The motor can be cooled efficiently.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating an air flow of a cooling machine according to an embodiment of the present invention.

FIG. 2 is an overall longitudinal sectional side view of the same.

FIG. 3 is a vertical sectional front view of a relevant part.

FIG. 4 is an exploded perspective view of the condenser fan case and the condenser blower fan.

FIG. 5 is an external perspective view of the same.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 exterior body 9 compressor 15 evaporator 16 condenser 17 blower unit 26 evaporator fan case 27 evaporator blower fan 28 condenser fan case 28A motor side end plate 29 condenser blower fan 29A main disk 30 motor 32 communication passage 35 Ventilation hole 37 Inlet opening a. Space where evaporator is installed b. Space where motor is installed

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-160750 (JP, A) JP-A-59-185513 (JP, U) JP-A-53-12040 (JP, Y2) (58) Field (Int.Cl. ⁶ , DB name) F24F 1/02

Claims (2)

(57) [Claims] 1. A refrigerant circuit comprising a compressor, a condenser, an evaporator, etc., an evaporator blower fan built in an evaporator fan case, a condenser blower fan built in a condenser fan case, and both blower fans. A cooling unit including a blower unit configured by a driving motor and the like is provided in the exterior body, and a sirocco fan is used as the blower fan for the condenser in a cooling device in which the blower unit is disposed between the evaporator and the condenser.
A main disk of the blower for the condenser is provided with an intake opening, and a ventilation hole is provided on a motor-side end plate of the fan case for the condenser, so that outside air flowing into the space where the motor is installed is supplied to the motor-side end plate. The air conditioner according to any one of claims 1 to 3, wherein the air is sucked into the condenser fan case through the vent hole of the air conditioner. 2. A refrigerant circuit comprising a compressor, a condenser, an evaporator, etc., an evaporator blower fan built in an evaporator fan case, a condenser blower fan built in a condenser fan case, and both blower fans. A cooling unit including a blower unit configured by a driving motor and the like is provided in the exterior body, and a sirocco fan is used as the blower fan for the condenser in a cooling device in which the blower unit is disposed between the evaporator and the condenser.
While a main disk of the condenser blower fan is provided with an intake opening, a vent hole is provided in a motor side end plate of the condenser fan case, and a space in which the motor is installed and a space in which an evaporator is installed. And a part of the cooling air cooled by the evaporator is caused to flow into the space where the motor is installed through the communication passage, and is sucked into the condenser fan case from the ventilation hole of the motor side end plate. A cooling machine characterized in that: