JPH0261442A - Wind quantity distribution control and cross wind preventing device of outdoor unit of air conditioner and the like - Google Patents

Abstract

PURPOSE:To eliminate the influence of cross wind to stabilize the control of a wind quantity by hanging from a top board at righthand and lefthand both sides of a case, providing a shielding plate for covering the upper part of a V-shapedly arranged heat exchangers, opening an inlet thereunder and providing a wind shielding plate from the bottom of a ravine between heat exchangers. CONSTITUTION:Heat exchangers 6 are V-shapedly arranged from the left upper part of a case 2 to the right upper part thereof through the downward of a fan 5, shielding plates 2a are provided over the upper part of the heat exchangers 6 on both the sides of right and left of the case 2 and an inlet 3 is opened thereunder. The upper part of the heat exchangers 6 is protected from cross wind by the shielding plates 2a. The cross wind passing through the heat exchanger 6 of the one hand by a wind screening plate 8 provided on a V-shaped ravine is prevented from flowing in the heat exchangers 6 of the other hand. Accordingly, the production of disturbances of correspondence of wind quantity control and pressure control by the cross wind can be prevented and the wind quantity control can stably be performed. Particularly, when the upper end of the screening plate 8 and the lower end of the shielding plates are overlapped each other, further effects are exhibited.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an air volume distribution control and cross wind prevention device for an outdoor unit of an air conditioner, and in particular, to an improvement in the correspondence between air volume control and pressure control due to cross winds. and measures to increase the capacity of heat exchangers.

[Conventional technology]

In air conditioners, particularly in annual coolers, when the outside air temperature is low, so-called low outside air temperature, the high pressure may drop and each device may not operate normally. For this reason, conventional methods have been adopted in which high pressure control is performed by lowering the air volume of the outdoor unit when the outside air temperature is low. In this case, the problem is that the cross wind that passes through one heat exchanger and is heated (or cooled) by the natural cross wind also passes through the other heat exchanger, causing the correspondence between air volume control and pressure control. is disturbed. Therefore, for example, as shown in Figure 3,
Windproof hoods (11) on both sides of the outdoor unit (10)
, (11) is installed, and the cross wind is connected to the heat exchanger (12),
A structure configured to prevent (12) from occurring has been proposed.

Furthermore, as disclosed in, for example, Japanese Utility Model Application Publication No. 52-35551, it has been proposed that a wind shield plate is disposed between a pair of left and right heat exchangers provided in an outdoor unit.

[Problem to be solved by the invention]

In the conventional example shown in Fig. 3, the windproof hood (11)
, By adding (11), the inhalation resistance increases,
There is a problem that the air volume decreases at room temperature, which may reduce the capacity, and that it also becomes large and requires a large space to install, which is disadvantageous in terms of cost.

Furthermore, the conventional example disclosed in Japanese Utility Model Application Publication No. 52-35551 has the advantage of being able to eliminate the effects of cross winds, preventing a decrease in performance at room temperature, and not requiring an increase in size.

However, in this case, the air volume distribution of each heat exchanger increases near the fan and decreases in locations far from the fan. Therefore, a sufficiently large heat transfer rate can be obtained in the upper part of the heat exchanger where the rate of change in heat transfer rate with respect to wind speed is small, but the heat transfer rate is low in the lower part of the heat exchanger where the rate of change in heat transfer rate with respect to wind speed is large, and the overall heat transfer rate is low. There is a dislike that the cooling capacity is kept low.

The present invention has been made in view of the above, and its purpose is to arrange a heat exchanger in a V-shape inside the case of an outdoor unit, and to cover the upper part of the heat exchanger with a shielding plate above the inlet. On the other hand, by raising the wind shield from the bottom of the valley formed between the heat exchangers, the capacity can be increased by reducing the wind speed at the top of the heat exchanger and increasing the wind speed at the bottom of the heat exchanger. and to prevent crosswinds without increasing the size of the outdoor unit and improve compatibility between air volume control and pressure control.

In that case, it may be possible to make the height of the wind shield lower than the upper edge of the inlet, but in this idea, after a portion of the crosswind blown into the case from the inlet passes through one heat exchanger, There is a risk that it will pass over the wind shield and flow to the other heat exchanger.

Therefore, an object of the present invention is to reliably prevent the cross wind that has passed through one heat exchanger from flowing to the other heat exchanger by limiting the height of the wind shield wall, thereby improving air volume control and pressure control. It also aims to further improve compatibility with control.

[Means to solve the problem]

In order to achieve the above object, the present invention arranges heat exchangers in a V-shape, covers the upper part of the heat exchanger with a shielding plate from the side, and connects the lower part of one heat exchanger to the other heat exchanger. By providing a wind shield plate to block the flow of crosswinds to the heat exchanger, the effect of crosswinds is reduced, and the wind speed at the top of the heat exchanger is reduced, and the wind speed at the bottom is increased, increasing the heat transfer rate as a whole. I'm trying to improve my abilities.

A specific means for solving the problem is, for example, as shown in FIG.
Inlet ports (3), (3) are opened on both left and right sides of the case (2) of the outdoor unit <1), and an exhaust port (4) is opened in the top plate (2b). There is a fan nearby (
5), and a pair of heat exchangers (6), (6) are arranged inside the case (2), which is an air volume distribution control and cross wind prevention device for an outdoor unit of an air conditioner. The heat exchangers (6) and (6) are arranged in a V-shape extending from the upper left part of the case (2) to the lower part of the fan (5) and the upper right part, while the above-mentioned suction port (3)
, (3) has a heat exchanger (
i3), (shielding plate (2a) covering the top of (i), (
2a), and double-convex exchangers (6), (6
) The wind shielding plate (8) is constructed to stand from the bottom of the valley (7) formed by the windshield.

In addition, especially in the invention according to claim (a), the wind shield plate (8
) is the valley (7) formed by the biconvex exchangers (6) and (8).
) stands up from the bottom so that its upper end overlaps the lower end of the shielding plate (2a).

[Effect]

With the above configuration, in the inventions according to claims (1) and (2), shielding plates (2a )
, (2a) are provided, and the shielding plates (2a) , (2a) are provided.
Suction port (3) below.

(3) by opening the shielding plate (2a),
(2a) can protect the upper parts of the heat exchangers (8) and (6) from cross winds, and the wind shield plate (8) prevents the cross winds that have passed through one heat exchanger (6) from exchanging heat with the other heat exchanger. Vessel (6
). In other words, the crosswind is the case (2
) on both left and right sides of the inlet (3), shielding plates (2a) (2a) above (3), and the wind shielding plate (8) block the wind, and the air volume and pressure are controlled by the crosswind. This prevents the occurrence of disturbances in the responsiveness of the airflow, and enables stable air volume control.

In particular, in the invention according to claim (2), the wind shield plate (8
) are shielding plates (2a), (2a) from the bottom to the top of the valley (7) formed by the side heat exchangers (6), (8).
Since it is raised so as to overlap the lower end of the heat exchanger (6), it is possible to more reliably prevent the cross wind that has passed through one heat exchanger (6) from the suction port (3) from flowing into the other heat exchanger (6).
The stability of air volume control can be ensured.

In addition, in the invention according to claim (1) or claim (2), the heat exchangers (8) and (B) extend from the upper left part of the case (2) to the upper right part of the case (2) through the lower part of the fan (5). V
Heat exchanger (6) by arranging it in a shape.

Heat exchanger (6) by placing the lower part of (6) close to fan (5)
.

While increasing the wind speed passing through the lower part of (6), the wind shield plate (8) allows the wind to pass from the upper edge of the inlet (3), which is the low speed part of the heat exchanger (B), (8). heat exchanger (6) by smoothly guiding the wind upward;
(8) Increase the wind speed passing under the lower part. The portions higher than the intermediate height of the heat exchangers ([1) and (6) are the shielding plates (2a) above the inlets (3) and (3) on both left and right sides of the case (2), ( 2a) reduces the wind speed at the top of the heat exchanger (8), (8), but the relationship between the change in wind speed and the change in heat transfer rate of the heat exchanger (8), <8) is As shown in FIG. 2, in the low wind speed region, the change Δ in the heat transfer rate with respect to a change in wind speed is large by 2, and in the high wind speed region, the change Δ in the heat transfer rate with respect to a change in wind speed is small by 1. For this reason, heat exchangers (8) and (6) with high wind speeds
) Change in heat transfer rate that decreases by lowering the wind speed in the upper part of heat exchanger (6) where the wind speed is lower than 1 in Δ, Change in heat transfer rate that increases by increasing the wind speed in the lower part of heat exchanger (6) By increasing Δ by 2, the overall heat transfer rate is K.
can be increased. Here, the heat exchanger (6),
As shown in equation (1), the capacity Q in (6) is proportional to the heat transfer rate, 1 heat transfer area A1, the temperature difference ΔT between the condensing temperature and the outside air, so the heat exchanger ( 6), by decreasing the wind speed at the upper part of (0) and increasing the wind speed at the lower part, the heat transfer rate K is increased as a whole, and the heat exchanger (6)
.

(6) ability Q can be improved.

Q- to -A・ΔT (1) [Effect of the invention] As explained above, the air volume distribution of the outdoor unit of the air conditioner of the invention according to claim (1) and claim (a) According to the control/crosswind prevention device, shielding plates are provided on both left and right sides of the case that hang down from the top plate and cover the top of the heat exchanger, and the intake ports are opened below the shielding plates, and they are arranged in a figure 7 shape. Since the wind shield plate is installed upright from the bottom of the valley formed between the side heat exchangers, the influence of cross winds is eliminated by the shield plate and the wind shield plate above the inlet on both the left and right sides. In addition, the heat exchanger is arranged in a V-shape, and the wind shield plate raised from the bottom of the side heat exchanger allows the wind passing through the bottom of the heat exchanger to be smoothly directed upward. While increasing the wind speed at the bottom of the heat exchanger by guiding the heat exchanger, the upper part of the heat exchanger is laterally covered with shielding plates above the intake ports on the left and right side walls to reduce the wind speed at the top of the heat exchanger.
Overall, the heat transfer rate can be increased and the capacity of the heat exchanger can be increased.

In particular, according to the invention according to claim (2), the cross wind blowing from the inlets on both the left and right sides and passing through the lower part of one heat exchanger is reliably blocked by the wind shield plate, and the cross wind is transferred to the other heat exchanger. This makes it possible to further stabilize the air volume control and the resulting high pressure control.

〔Example〕

Hereinafter, one embodiment of the invention according to the present application will be described based on the drawings.

FIG. 1 shows a longitudinal section of an embodiment of the invention according to claims (1) and (2) of the present application, and in the same figure, (1)
) is the outdoor unit, (2) is the case, (2a), (2
a) is the left and right shielding plate, (2b) is the top plate, (3), (
3) is an inlet, (4) is an exhaust port, (5) is a propeller fan, (6), (6) is a heat exchanger, (7) is a valley, and (8) is a wind shield.

The case (2) is formed into a box shape, and intake ports (3) are formed on both left and right sides of the case (2), and an exhaust port (4) is formed in the center of the top plate (2b). A propeller fan (5) is placed in the upper part of the case (2) concentrically with the exhaust port (4), and by rotating this propeller fan (5), outside air is drawn from the intake ports (3) and (3) to the case. (2
), and the air in the case (2) is discharged to the outside through the exhaust port (4).

Also, inside the case (2), there is a heat exchanger (6) that slopes downward from the upper left corner of the propeller fan (5), and a heat exchanger (6) that slopes downward from the upper right corner of the propeller fan (5).
The side heat exchangers (6) and (8) are arranged in a V-shape.
A windshield plate (8) is raised from the bottom of the valley (7) formed by. The above shielding plate (2a), (2a)
hangs down from the side edge of the top plate (2b), and the heat exchangers (3), (
The shielding plate (2) is provided so as to cover almost the upper half of the shielding plate (2).
a), (2a) below the inlet (3), (3)
is formed. And the six inlets (3), (3)
is opened so that its upper edge is located at the middle height of the side heat exchangers (8) and (e), and the upper end of the wind shield plate (8) is located at the middle height of each shield plate (2a) and (2a). It is located at a higher position than the lower end and is formed so as to wrap around it.

Furthermore, a machine room (9) for a compressor and the like is formed below the side heat exchangers (6) and (8).

In this outdoor unit (1), for example, the case (2
), when a crosswind blows from the left side of the left heat exchanger (6
) is blocked, and the crosswind is prevented from passing through the left heat exchanger (6) and flowing to the right heat exchanger (6).

Therefore, the cross wind heated (or cooled) passing through the heat exchanger (6) on the left side passes through the heat exchanger (6) on the right side. 2a)
and the wind shield plate (8), and can prevent disturbance in the correspondence between air volume control and pressure control due to crosswind from the left side.

Similarly, if there is a crosswind from the right side, the heat exchanger on the right side (
The cross wind heated (or cooled) through the heat exchanger (6) on the left side passes through the inlet (3) on the right side.
) and the wind shield plate (8) on the upper side, thereby preventing disturbance in the correspondence between the air volume control and the pressure control due to the cross wind from the right side.

In addition, the influence of cross winds is eliminated by the shielding plates (2a), (2a) above the intake ports (3), (3) on both the left and right sides, and the wind shielding plate (8) inside the case (2). The outdoor unit (2) is not made larger in order to eliminate the influence of crosswinds.

In addition, in this outdoor unit (1), the wind generated by the propeller fan (5) is transferred to the side heat exchanger (6),
(B) The wind speed when passing through the heat exchanger (6).

At the top of (6), the shielding plates (2a) and (2a) above the left and right intake ports (3) become an obstacle, and the speed slows down from α shown by the broken line in Figure 1 to α' shown by the solid line. ,
At the bottom of the heat exchangers (8) and (6), the side heat exchanger (6)
.

(6) is arranged in a V-shape, its lower part can be brought closer to the propeller fan (5), and the side heat exchanger (
6), the air passing through the lower part of (6) is smoothly redirected upward by the wind shield plate (8), so that the speed increases, for example, from β shown by a broken line in FIG. 1 to β' shown by a solid line.

As a result, as shown in Figure 2, the propeller fan (5)
- Near the layer, the heat exchanger (6) has a high wind speed, and at the upper part of the heat exchanger (6), the heat transfer rate K decreases in response to the decrease in wind speed, and the heat exchanger (6) that is far from the propeller fan (5) , (8)
The heat transfer rate K increases in response to the increase in wind speed below the . Here, as shown in FIG. 2, the change Δ in the heat transfer rate with respect to the wind speed change Δυ is small in a high wind speed region and large in a low wind speed region. Therefore, heat exchanger<6), (8
) at the top of the wind speed from α to α′ (for example, from 3 m/s to 2
Due to the rate of change Δ in the heat transfer rate, which decreases as the heat transfer rate decelerates to ), it is possible to increase the rate of change ΔK in the heat transfer rate that increases by increasing the speed up to ), thereby increasing the overall heat transfer rate K, increasing the ability to increase or decrease in direct proportion to the increase or decrease in the heat transfer rate. be able to.

In this example, in order to obtain the highest capacity, the wind speed at the top of the heat exchangers (8) and (6) is reduced and the wind speed at the bottom is increased, so that the wind speed is averaged. However, this is not essential to the present invention, and the wind speed distribution may have an increasing slope or a decreasing slope from the top to the bottom as long as the heat transfer rate K increases as a whole.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of an embodiment of the invention according to claims (1) and (2) of the present application, and FIG. 2 is a heat exchanger showing the relationship between wind speed and heat transfer rate. The characteristic diagram and FIG. 3 are longitudinal cross-sectional views of a conventional example. (1)...Outdoor unit, (2)...Case, (2
a)... Shielding plate, (2b)... Top plate, (3)...
Suction port, (4)...Exhaust port, (5)...Propeller fan, (6)...Heat exchanger, (7)...Valley, (8)
...Wind shielding board.

Claims (2)

[Claims] (1) Inlet ports (3), (3) are opened on both left and right sides of the case (2) of the outdoor unit (1), and the top plate (
2b), and a fan (5) is arranged near the exhaust port (4) in the case (2), while a pair of heat exchangers (6) are installed in the case (2). ), (6) are installed in the air volume distribution control and cross wind prevention device for an outdoor unit of an air conditioner, in which the pair of heat exchangers (6), (6) are installed from the upper left inside the case (2). It is arranged in a V-shape extending below the fan (5) to the upper right corner, while the above-mentioned suction port (3
), (3) has a heat exchanger (6) hanging from the top plate (2b).
), (6) are provided, and a wind shield plate (8) is installed from the bottom of the valley (7) formed by both heat exchangers (6), (6). An air volume distribution control and cross wind prevention device for an outdoor unit of an air conditioner, characterized in that it is installed vertically. (2) The upper end of the wind shield plate (8) is the shield plate (2a)
A claim that is raised to overlap the bottom edge of the (
1) Air volume distribution control and cross wind prevention device for the outdoor unit of the air conditioner described above.