JP2021050899A - Air blow-out opening flow directing plate and air-cooled heat pump with the same - Google Patents

Abstract

To equalize and direct straight air blown out from an air blower for a heat exchange circuit so as to improve its performance.SOLUTION: A honeycomb plate 1 for an air-cooled heat pump has an air suction opening 11 on a lateral side thereof, is brought to cover an air blow-out opening 11b of a heat exchange circuit 10 from which air from an air blower inside a top face is blown out, and is configured to direct the air blown out from the air blow-out opening 11b directly upward.SELECTED DRAWING: Figure 1

Description

The present invention relates to a straightening vane for an air outlet and an air-cooled heat pump including the straightening vane.

Conventionally, as shown in FIG. 6, the heat exchange chamber 111 and the heat exchange chamber 111 are formed by providing air suction ports 111d on both side surfaces 111c and inclining both side surfaces 111c downward so as to reduce the width. The machine chamber 112 is continuously provided on the lower surface of the machine and the side surfaces 112c are inclined so as to expand downward in width, and the machine chamber 112 is arranged in the heat exchange chamber 111 facing the air suction port 111d. A heat exchange circuit (air heat exchanger) 110 including a heat exchanger 113 and a blower 114 that blows air sucked from the air suction port 111d through the heat exchanger 113 from the air outlet 111b is known (for example). , Patent Document 1).

As shown in FIG. 7, when the heat exchange circuit 210 is installed near the wall W1, if the soundproof wall W2 is higher than the air outlet 11b of the heat exchange circuit 210, the air blown out from the heat exchange circuit 210 is soundproof. It is known that it hits the wall W2 and becomes a downward flow to make a short circuit. In this case, a duct D is attached to the blown air side and raised above the soundproof wall W2 to prevent a short circuit.

Further, in such a heat exchange circuit, a plurality of such heat exchange circuits are often installed adjacent to each other. Therefore, for example, as shown in Patent Document 2, a heat shield is bridged above each outside air suction port of a plurality of heat exchange circuits arranged to face each other and shields the space between the heat exchange circuits up and down. A heat shield for a heat exchange circuit having a sheet is known. This heat shield sheet has the effect of lowering the suction temperature during cooling operation and the effect of raising the suction temperature during heating.

Japanese Unexamined Patent Publication No. 2007-163017 Japanese Unexamined Patent Publication No. 2014-37920

However, in the heat exchange circuit 210 having the duct D as shown in FIG. 7, when the soundproof wall W2 is very high, the duct D also needs to be very high according to the height of the soundproof wall W2. If the duct D is raised, maintenance of the blower and the motor inside the machine room becomes difficult, so that the height of the duct D is generally suppressed to about 1 m. Then, there is a problem that the short circuit cannot be sufficiently prevented.

The method of installing the heat shield sheet between the heat exchange circuits as in Patent Document 2 cannot be used when the heat exchange circuits are in close contact with each other. There is also a plan to install a seat in the passage between the heat exchange circuit and the wall, but since there are many equipment pipes in the passage, the seat cannot be installed horizontally and the width of the passage varies depending on the site. It is not realistic considering the cost and workability.

In addition, the fan installed on the blowout side of the heat exchange circuit is usually a propeller fan, and when the blowout air flow is visualized, there is no straightness and the blown air spreads around and rises while turning, so the wind If it is strong, there is no ascending force, and it tends to hit the wall near the heat exchange circuit and generate a downward flow. In addition, since the space between the adjacent fans is narrow, the air blown from the adjacent fans rises while colliding with each other.

The present invention has been made in view of this point, and an object of the present invention is to make the air blown out from the air outlet of the heat exchange circuit uniform and allow the air to travel straight to improve its performance.

In order to achieve the above object, in the present invention, a honeycomb plate is provided at the air outlet of the blower.

Specifically, the air outlet rectifying plate of the first invention is the air outlet of a heat exchange circuit having an air suction port on a side surface and an air outlet for blowing air from an internal blower on the upper surface. It is covered so as to close the air outlet, and is configured to orient the air blown out from the air outlet directly upward.

According to the above configuration, even when the flow of air blown from the internal blower is usually spiral, the air outlet rectifying plate orients the air blown from the air outlet directly upward. , The short circuit, which was a problem when there is no air outlet rectifying plate, is surely prevented. Maintenance costs are reduced because it is easy to install and remove.

In the second invention, in the first invention,
Aluminum foil is continuously molded and laminated as a hexagonal aggregate.

According to the above configuration, it is possible to easily manufacture an inexpensive air outlet rectifying plate that is not rusty and not too heavy, has appropriate strength, and is easy to install.

In the third invention, in the first or second invention,
The thickness is 20 mm or more and 40 mm or less.

If it exceeds 40 mm, the pressure loss increases, and if it is smaller than 20 mm, the rectifying effect decreases. However, according to the above configuration, an appropriate rectifying effect is exhibited while appropriately suppressing the pressure loss.

The air-cooled heat pump of the fourth invention is provided with a plurality of heat exchange circuits in which the air outlet rectifying plate of any one of the first to third inventions is covered with the air outlet.

According to the above configuration, an efficient air-cooled heat pump in which a short circuit is prevented by the air outlet rectifying plate can be obtained.

In the fifth invention, in the fourth invention,
The air outlet rectifying plate is thinned out and installed at least in a part of a plurality of adjacent air outlets.

According to the above configuration, even if the air outlet rectifying plate is appropriately thinned out and installed, the short circuit is suppressed, so that the manufacturing cost and the installation cost can be suppressed. For example, the air outlet rectifying plate may be placed only on the air outlet of the heat exchange circuit, which has many short circuits and does not perform well.

As described above, according to the present invention, the air blown from the blower of the heat exchange circuit can be made uniform and travel straight, and its performance can be improved.

It is a perspective view which shows the air-cooled heat pump which provided the honeycomb plate for the air-cooled heat pump at the air outlet. It is a front view which shows the air-cooled heat pump which provided the honeycomb plate for the air-cooled heat pump at the air outlet. It is a top view which shows the honeycomb plate for an air-cooled heat pump. It is a top view which shows an example (Example 1) of the installation pattern of the honeycomb plate for an air-cooled heat pump. It is a top view which shows another example (Example 2) of the installation pattern of the honeycomb plate for an air-cooled heat pump. It is sectional drawing which shows the conventional heat exchange circuit. It is a front view which shows the outline of the air flow from a conventional heat exchange circuit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 and 2 show an air-cooled heat pump 2 provided with a honeycomb plate 1 for an air-cooled heat pump as a rectifying plate for an air outlet according to an embodiment of the present invention, and the air-cooled heat pump 2 is a heat exchange circuit shown in FIG. A large number of heat exchange circuits 10 similar to the 110 are adjacent to each other. The heat exchange circuit 10 has an air suction port 11 on the side surface, a machine room 12 on the lower surface, and an air outlet 11b on the upper surface for blowing air from an internal blower (not shown). The control panel 15 is configured to control the machine room 12 all at once. In the present embodiment, the shape of the air outlet 11b is circular in a plan view, but the shape is not necessarily limited to this.

As shown in FIG. 3, the honeycomb plate 1 for an air-cooled heat pump is a disk-shaped one that is covered so as to close the air outlet 11b having a circular shape in a plan view, and directs the air blown out from the air outlet 11b directly upward. It is configured as follows. The honeycomb plate 1 for an air-cooled heat pump is, for example, one in which aluminum foil is continuously molded and laminated as a hexagonal aggregate. For example, the thickness is about 20 mm, the outer shape is about 740 mm, and the cell size is about 8 mm. If it exceeds 40 mm, the pressure loss increases, and if it is smaller than 20 mm, the rectifying effect decreases. However, if the thickness is 20 mm or more and 40 mm or less, an appropriate rectifying effect is exhibited while appropriately suppressing the pressure loss. In the present embodiment, an inexpensive honeycomb plate 1 for an air-cooled heat pump that is not rusty and not too heavy, has appropriate strength, and is easy to install can be easily manufactured, but the material and shape are not limited thereto. In short, any shape may be used as long as the air blown out from the air outlet 11b can be oriented directly upward, and may be in a grid pattern, for example. Since the honeycomb plate 1 for an air-cooled heat pump is attached to the air outlet 11b, for example, with a binding band, workability is extremely good.

In FIG. 1, all the air outlets 11b are covered with the honeycomb plate 1 for the air-cooled heat pump, but even if the honeycomb plate 1 for the air-cooled heat pump is thinned out to at least a part of the plurality of adjacent air outlets 11b. Good.

For example, in the first embodiment of FIG. 4, four heat exchange circuits 10 in a vertical row form one unit 3, and among the air-cooled heat pumps 2, the units 3 covered with the honeycomb plate 1 for the air-cooled heat pump are spaced apart from each other. It is arranged. That is, a total of five units 3 are covered with the honeycomb plate 1 for an air-cooled heat pump, and the remaining six units 3 are not covered.

In the second embodiment of FIG. 5, 11 units 3 are arranged in the same manner as in the first embodiment, and the honeycomb plate 1 for an air-cooled heat pump is covered only on the heat exchange circuit 10 on the wall side of one unit.

Although not shown, the honeycomb plate 1 for an air-cooled heat pump may be covered only on the air outlet 11b of the heat exchange circuit 10 which has many short circuits and does not perform well.

-Effect confirmation-
The result of the effect experiment on the straightness of the airflow and the performance evaluation according to the first embodiment shown in FIG. 4 will be described.

(Straightness of airflow)
As shown in FIG. 7, when the heat exchange circuit 10 is cooled, when the blown air hits the wall and descends, the suction temperature of the heat exchange circuit 10 becomes about 45 ° C., the condenser pressure in the machine room 12 becomes high, and the high pressure is cut. There is a possibility that you will not be able to drive.

Further, during heating, the blown air hits the wall and the specific gravity of the air becomes heavier, so that a downward flow is more likely to occur than during cooling. When the suction temperature becomes 0 ° C. or lower, ice is attached to the heat exchanger and a defrost operation is performed to melt the ice, so that the hot water outlet temperature does not rise and the COP may drop significantly.

As a result of conducting an experiment, in the case of Example 1, the blown air of the heat exchange circuit 10 to which the honeycomb plate 1 for the air-cooled heat pump was attached also rectified the airflow of the blown air of the adjacent heat exchange circuit 10 and proceeded straight up to about 8 m. I found out that I would do it. It was found that this rectified air is less susceptible to wind and prevents short cuts due to airflow.

On the other hand, in the comparative example in which the honeycomb plate 1 for the air-cooled heat pump was not covered at all in the same arrangement as in Example 1, it was found that the blown air rises spirally and therefore rises only about about 3 m.

(Performance evaluation)
A performance evaluation experiment was conducted under the conditions of outside air 5 ° C., hot water inlet temperature 40 ° C., hot water outlet temperature 50 ° C., and load factor 80%. As a result of comparing the honeycomb plate 1 for the air-cooled heat pump with and without it, the COP without it was 2.92, and the COP with and without it was 3.01, which was an improvement of about 3%. This is because the proportion of the airflow that hits the wall and becomes a downward flow decreases, so the temperature of the suction air rises compared to the case without the honeycomb plate 1 for the air-cooled heat pump, so the efficiency of the entire air-cooled heat pump 2 is about 3%. It is considered to have improved.

As described above, in the present embodiment, the honeycomb plate 1 for the air-cooled heat pump orients the air blown out from the air outlet 11b directly upward, which is a problem when the honeycomb plate 1 for the air-cooled heat pump is not provided. Is definitely prevented.

Further, an efficient air-cooled heat pump 2 in which a short circuit is prevented by the honeycomb plate 1 for an air-cooled heat pump can be obtained. For example, when 11 units 3 of 50 horsepower are installed, the COP at the time of heating is improved by 3%, so that if the unit 3 is operated 24 hours a day with a load of 100%, it can be depreciated in about 3 months.

Further, even if the honeycomb plate 1 for the air-cooled heat pump is appropriately thinned out and installed, the short circuit is suppressed, so that the manufacturing cost and the installation cost can be suppressed.

Further, since it is only necessary to cover the air outlet 11b of the heat exchange circuit 10 of the air-cooled heat pump 2 that has already been installed with the honeycomb plate 1 for the air-cooled heat pump, the installation cost is low and the effect of improving the thermal efficiency is great.

Therefore, according to the honeycomb plate 1 for an air-cooled heat pump according to the present embodiment, the air blown from the blower of the heat exchange circuit can be made uniform and travel straight, and its performance can be improved.

(Other embodiments)
The present invention may have the following configuration with respect to the above embodiment.

That is, in the above embodiment, the honeycomb plate 1 for an air-cooled heat pump having a circular shape in a plan view is provided at the air outlet 11b, but when there is a muffling duct above the air outlet 11b, the air-cooled heat pump is provided at the outlet of the muffling duct. The honeycomb plate 1 may be covered. In that case, for example, it may be a quadrangle in a plan view.

In the above embodiment, the example of the air-cooled heat pump 2 has been described, but it can also be applied to a package air conditioner, a gas heat pump, and an air outlet of a cooling tower.

It should be noted that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and applications.

1 Honeycomb plate for air-cooled heat pump (rectifying plate for air outlet)
2 Air-cooled heat pump
3 units
10 Heat exchange circuit
11 horizontal row
11 Air suction port
11b Air outlet
12 Machine room
15 Control panel
W1 wall
W2 soundproof wall
110 heat exchange circuit
111 Heat exchange room
111b Air outlet
111c both sides
111d air suction port
112 Machine room
112c both sides
113 heat exchanger
114 blower
210 heat exchange circuit

Claims (5)

It is covered so as to block the air outlet of the heat exchange circuit having an air suction port on the side surface and an air outlet for blowing air from the internal blower on the upper surface, and the air blown out from the air outlet is directly above. An air outlet rectifying plate characterized by being configured to be oriented. In the air outlet rectifying plate according to claim 1,
A straightening vane for an air outlet, characterized in that aluminum foil is continuously molded and laminated as a hexagonal aggregate. In the air outlet rectifying plate according to claim 1 or 2.
An air outlet rectifying plate having a thickness of 20 mm or more and 40 mm or less. The air-cooled heat pump according to any one of claims 1 to 3, wherein a plurality of heat exchange circuits covered with the air outlet are provided adjacent to each other. In the air-cooled heat pump of claim 4,
An air-cooled heat pump characterized in that the above-mentioned air outlet rectifying plate is thinned out at at least a part of a plurality of adjacent air outlets.

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