JP3189263B2 - Outdoor unit heat exchanger protection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit of an air conditioner, and more particularly, to heat exchange of an outdoor unit provided with a heat exchange guard for protecting a heat exchanger provided in the outdoor unit. The present invention relates to a device protection device.

[0002]

2. Description of the Related Art An outdoor unit of a small cooler exclusively used for cooling or a heat pump type air conditioner for both heating and cooling is provided with an inlet and an outlet in an outer box provided with a heat exchanger, an outdoor blower fan and the like. The intake port and the exhaust port are generally formed in a substantially rectangular shape according to the shape of the heat exchanger, and a ventilation path is formed between the intake port and the exhaust port surrounded by the panel constituting the outer box. ing.

[0003] An outdoor blower fan is installed in this ventilation path, and a heat exchanger is arranged on the intake port side. Further, a heat exchange guard is attached to the exhaust port so as to face the heat exchanger.

[0004] The heat exchange guard protects the heat exchanger and is formed in a grid using steel wires having a diameter of several millimeters. In this heat exchange guard, the steel wire is cut in accordance with the vertical and horizontal dimensions of an exhaust port to form a vertical wire and a horizontal wire, and then welded by crossing them vertically and horizontally.

[0005] The heat exchange guard has a plurality of projecting portions which extend vertically and horizontally by extending several of the vertical and horizontal wires from the outer peripheral edge thereof. The heat exchange guard is fixed so as to cover the exhaust port by welding to the periphery of the exhaust port.

In addition, the entirety of the heat exchange guard is formed larger than the exhaust port, and a screw hole is formed in a peripheral portion of the exhaust port, and the outside of the heat exchange guard is formed using a saddle-shaped stopper. The vertical and horizontal wires at the periphery are held down by fasteners and fixed with screws.

[0007]

However, when this heat exchange guard is attached to the exhaust port of the outer box, the work of welding the projecting portion to the peripheral edge of the exhaust port is extremely troublesome. Since it is difficult to remove it later, there still remains a problem that the maintenance work is hindered.

In the case where the heat exchange guard is fixed by screws using the stoppers, there is an advantage that maintenance work can be performed because the guards can be removed, but a large number of stoppers and screws are required. In addition to the increase in the number of parts, there is also a problem in that it takes time and effort when attaching and detaching, so that assembling work and maintenance work cannot be performed quickly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a fan protection device for an outdoor unit, which facilitates attaching and detaching work of a heat exchange guard and can quickly perform maintenance work and the like. .

[0010]

According to a first aspect of the present invention, an outdoor fan is provided in a ventilation path between an intake port and an exhaust port provided in an outer box. In the heat exchanger protection device of the outdoor unit, a heat exchanger is arranged on the mouth side, and a heat exchange guard formed in a lattice shape using a steel wire is attached to the intake port opposite to the heat exchanger. The outer shape of the heat exchange guard is formed slightly larger than the opening of the intake port, and the opening has a plurality of engagements at a required interval with all other inner peripheral edges except the upper inner peripheral edge thereof. A plurality of engaging projections are formed on the outer peripheral edge of the heat exchange guard at positions opposed to the respective engaging holes, and a plurality of engaging projections are formed on the outer peripheral edge at an upper portion of the outer peripheral edge. A plurality of pieces having a length such that the top end thereof abuts on the upper surface of the heat exchanger and the top plate of the outer box in a combined state. When the heat exchange guard is attached, a pressing force is applied toward the center to slightly curve the heat exchange guard so that the outer shape is slightly smaller than the opening. The engaging projection is inserted and engaged with the engaging hole, and the locking projection is inserted between the upper surface of the heat exchanger and the top plate of the outer box.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a schematic configuration of an outdoor unit according to the present invention.

This fan protection device for an outdoor unit is applied to a heat pump type air conditioner installed in a general house, and uses a heat exchanger 11 disposed in an outer box 2 of the outdoor unit 1 for a heat exchange guard.
It is configured to be protected by 15.

The outer box 2 includes a lower substrate 3 and an upper top plate 4.
Is surrounded by front and rear panels 5 and 6 and left and right panels 7 and 8 to form a rectangular shape as a whole. An intake port 9 is opened in the front panel 5 and an exhaust port 10 is opened in the rear panel 6. This exhaust 10 and intake
9 is formed in a substantially square shape or a substantially rectangular shape in accordance with the outer shape of the outer box 2, and between the intake port 9 and the exhaust port 10, the board 3, the top plate 4 and the A ventilation path 12 surrounded by left and right panels 7 and 8 is provided.

An outdoor blower fan 14 fixed to a support frame (not shown) provided between the substrate 3 and the top plate 4 is provided in the ventilation path 12. A fan guard is provided in the exhaust port 10 in opposition to the outdoor blower fan 14.
13 is installed. When the outdoor blower fan 14 is driven to rotate, outside air is discharged from the intake port 9 through the ventilation path 12 to the exhaust port 10 as shown by the arrow in FIG.

A compressor (not shown) and a heat exchanger 11 constituting a refrigeration cycle are arranged on the substrate 3. The heat exchanger 11 is fixed to the intake port 9 side, and a heat exchange guard 15 is attached to the opening 9a of the intake port 9. In the inner peripheral edge 9b of the opening 9a, at the upper end both side surfaces and the lower end bottom surface, three places,
An engagement hole 9c into which an engagement protrusion 15a to 15e described later can be inserted is formed (see FIG. 4).

The heat exchange guard 15 is provided with an outdoor blower fan 14.
As shown in FIGS. 2 to 4, it is formed in a lattice shape using a steel wire having a diameter of several millimeters. This heat exchange guard 15 cuts a steel wire longer than the vertical and horizontal dimensions of the exhaust port 10, forms five vertical wires 16 and horizontal wires 17, and welds them by crossing them vertically and horizontally. Thus, the outer shape is formed slightly larger than the opening 9a of the intake port 9.

By projecting the vertical wire 16 and the horizontal wire 17 from the outer peripheral edge of the heat exchange guard 15, a plurality of engaging projections 15a to 15e and locking projections 15f to 15h are projected. I have. The engaging projections 15a to 15e are formed in the central portion of the vertical wire 16, the left and right side portions and the upper stage of the horizontal wire 17 in the engagement hole of the opening 9a.
It is extended by a length that can be inserted into 9c.

The locking projections 15f to 15h allow the central portion and the left and right middle portions of the vertical wire 16 to protrude from the upper end of the heat exchange guard 15, and the engagement projections 15a to 15e are formed in the engagement holes 9c. Is set to a length such that the front end side abuts on the upper surface 11a of the heat exchanger 11 and the lower surface 4a of the top plate 4 in the engaged state. The locking projections 15f to 15h are appropriately directed inward so that the distal ends are resiliently locked in a state where the distal ends contact the upper surface 11a of the heat exchanger 11 and the lower surface 4a of the top plate 4. (Figs. 3 and 4)
reference).

As shown in FIG. 4, the heat exchange guard 15 is attached to the heat exchanger 11 so that the heat exchange guard 15 can be brought into contact with the heat exchanger 11 without looseness. And the upper, middle, and lower tiers of the horizontal wire 17 are curved inward. Further, when the heat exchange guard 15 is attached to the intake port 9, the vertical portion 16 is bent outward at the center and the left and right intermediate portions so as to be easily bent as a whole.

When the heat exchange guard 15 is attached to the air inlet 9 of the outer box 2, a pressing force is applied from the outer side of the heat exchange guard 15 toward the center, so that the heat exchange guard 15 is attached. Is slightly curved so that the outer shape is slightly smaller than the opening 9a of the intake port 9.

As shown by a chain line in FIG. 4, two engagement holes 9c formed below the inner peripheral edge 9b of the opening 9a are provided.
The engagement protrusions 15a to 15c of the heat exchange guard 15 are engaged. Subsequently, two engagement holes 9 formed on both sides of the inner peripheral edge 9b of the opening 9a
The engagement projections 15d and 15e of the heat exchange guard 15 are engaged with c. At this time, three locking projections 15f to 15h provided at the upper part of the outer peripheral edge of the heat exchange guard 15 are inserted between the upper surface 11a of the heat exchanger 11 and the lower surface 4a of the top plate 4, and Is brought into contact with both 4a and 11a.

When the pressing force applied to the heat exchange guard 15 is deactivated in this state, the five engagement projections 15a to 15e and the three locking projections 15f to 15f are generated by the restoring force of the heat exchange guard 15. 15h is pushed out. Therefore, each of the engagement protrusions 15a to 15e is strongly engaged with the engagement hole 9c, and each of the engagement protrusions 15f to 15h is between the upper surface 11a of the heat exchanger 11 and the top plate 4 of the outer box 2. It is elastically locked.

As a result, the heat exchange guard 15 is firmly held between the inlet 9 and the heat exchanger 11. In this state, the curved portions of the vertical wire 16 and the horizontal wire 17 come into contact with the front surface of the heat exchanger 11, and rattling is prevented. Further, when the outdoor blower fan 14 rotates and the vibration is transmitted to the outer box 2, the heat exchange guard 15 does not resonate and the swing of the heat exchanger 11 is also suppressed, so that generation of abnormal noise is prevented. You.

On the other hand, when removing the heat exchange guard 15, the heat exchange guard 15 is pressed toward the center from the outer portion thereof, and the heat exchange guard 15 is slightly curved so that the outer shape is changed to the opening of the intake port 9. Pull out the upper part while making it slightly smaller than the part 9a. Then, the three locking projections 15f to 15h are separated from the outer box 2, and the left and right engagement projections 15d and 15e are pulled out from the respective engagement holes 9c. Next, when the heat exchange guard 15 is pulled upward, the lower engagement protrusions 15a to 15c are pulled out from the engagement holes 9c, and the heat exchange guard 15 can be removed. As described above, since the heat exchange guard 15 is easily attached and detached, the assembling is simplified, and the maintenance work can be easily performed.

In the above embodiment, the locking projection 15
f to 15h are configured to abut between the upper surface 11a of the heat exchanger 11 and the top plate 4 of the outer box 2 to resiliently lock.
The length may be set so that f to 15h is elastically locked only on the top plate 4 side of the outer box 2.

[0026]

According to the first aspect of the present invention, when the heat exchange guard is attached to the intake port of the outer box, the pressing force is applied in the direction of the center and the entirety of the opening is slightly curved. The heat exchange guard is placed between the air inlet and the heat exchanger by engaging the engagement projection with the mating hole and abutting the locking projection between the top surface of the heat exchanger and the top plate of the outer box. The heat exchange guard that protects the heat exchanger is extremely easy to install, and the manufacturing process is greatly simplified compared to screwing and welding. Has an effect. Further, since the attachment and detachment of the heat exchange guard is easy, there is an advantage that maintenance work can be easily performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a schematic configuration of an outdoor unit according to one embodiment of the present invention.

FIG. 2 is a front view showing a heat exchange guard in the heat exchanger protection device of the outdoor unit.

FIG. 3 is a plan view of the heat exchange guard.

FIG. 4 is an explanatory diagram of an operation of attaching the heat exchange guard to an intake port.

FIG. 5 is a front view of an outer box in which the heat exchange guard is attached to an air inlet.

[Explanation of symbols]

 2 Outer case 4 Top plate 9 Suction port 9a Opening 9b Inner peripheral edge 9c Engagement hole 11 Heat exchanger 11a Top surface 15a-15e Engagement projection 15f-15h Engagement projection

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 5/00

Claims (1)

(57) [Claims] 1. An outdoor fan is disposed in a ventilation path between an intake port and an exhaust port provided in an outer box, and a heat exchanger is disposed on the intake port side. In a heat exchanger protection device for an outdoor unit in which a heat exchange guard formed in a lattice shape using a steel wire is attached to a mouth, an outer shape of the heat exchange guard is formed to be slightly larger than an opening of the intake port. In this opening, a plurality of engagement holes are formed at predetermined intervals on all the inner peripheral edges except the upper portion of the inner peripheral edge, and the outer peripheral edge of the hot hole guard is provided with each of the engaging holes. A plurality of engaging projections are protruded at positions facing the mating holes, and the upper surface of the heat exchanger and the top of the outer box are provided on the outer peripheral edge in a state where the engaging projections are engaged with the engaging holes. When providing a plurality of locking projections having a length that the tip side abuts on the plate, when attaching the heat exchange guard, Applying a pressing force toward the center, the heat exchange guard is slightly curved to make the outer shape slightly smaller than the opening, and the engaging projection is inserted into the engaging hole, and the locking is performed. A heat exchanger protection device for an outdoor unit, wherein a projection is inserted between an upper surface of a heat exchanger and a top plate of an outer box.