JPS58168859A - Water sprinkler of evaporation type cooler - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an evaporative cooler, and particularly to a water sprinkling method for an evaporative cooler suitable for uniformly dispersing water on the surface of a heat transfer tube and making the entire heat transfer surface an effective evaporation surface. Regarding equipment.

Figures 1, 2, and 3 show the water sprinkler system for conventional evaporative coolers.
This will be explained with reference to FIG. The heat exchanger tubes 4 are arranged horizontally in multiple stages. Water flowing out from the water sprinkling holes 2 of the water sprinkler pipes 1 installed at the upper part of the heat transfer tubes 4 evaporates on the surface t-wetting surface of the heat transfer tubes 4. At this time, due to the latent heat of vaporization, the internal t-
Cooling flowing hot process fluids. The water sprinkling holes 2 are provided on the lower surface of the water sprinkling pipe 4 at regular intervals. but,
When a bare tube is used as a heat transfer tube in a sprinkler system constructed as described above, as shown in FIGS. The heat exchanger tubes 1 are then sprayed onto the upper surface of the heat exchanger tube 1 in the uppermost stage. This sprayed water naturally flows down along the heat exchanger tubes 4 and accumulates on the lower surface of the heat exchanger tubes 4.

This accumulated spray water drips onto the upper surface of the heat transfer tube 4 located below.

When water is sprinkled with a small amount of water, the sprayed water that flows out from the watering holes 2 is rounded down in a thin string shape and does not spread horizontally on the upper surface of the heat exchanger tube 4 in the uppermost stage, but flows along the heat exchanger tube 4. It flows like a thread to the lower surface for heat transfer. Therefore, only the heat transfer surface immediately below the water sprinkling hole 2 becomes wet in the form of a thread, and the heat transfer surface other than directly below the water sprinkling hole 2 becomes dry. Therefore, the effective evaporation area was small because the heat transfer surface could not be uniformly wetted with water over the entire length.

Furthermore, when a finned tube is used as a heat transfer tube as shown in FIGS. 3 and 4, the sprayed water from the water sprinkling pipe 1 flows out from each water sprinkling hole 2. The fin tube 411. Drop onto the top of the fin tube to wet the surface of the fin tube. However, the fin/6 of the fin tube 4a acts like a bank to prevent the spray water flowing down from each water hole 2 from spreading in the horizontal direction on the upper surface of the fin tube 4a.
Do t.

At this ninth stage, the sprayed water flowing down from each sprinkling hole 2 wets only the surface between the fins of the uppermost fin tube 4a directly below each sprinkling hole 2. The surface of the fin tube 4a, other than the surface directly below the water sprinkling hole 2, is always kept dry because the spray water does not flow thereon. The surface of the fin tube 4a in the second and subsequent stages partially flows only on the surface of the fin tube 4m in the upper stage.

With this water spraying device, it is impossible to spray water uniformly over the entire length of the fin tube. In order to spray water uniformly over the entire length of the fin tube with this device, it is necessary to provide the same number of watering holes 2 as the number of fins in the watering pipe L, and each watering hole 2T must be made smaller, which is not easy. do not have.

An object of the present invention is to provide a water sprinkling device for an evaporative cooler that sprays water on the surface of a heat exchanger tube over its entire length. This is an evaporative cooler that sprinkles water over the entire length of the heat exchanger tube by providing grooves and connecting the grooves and the heat exchanger tubes with side plates with good hydrophilicity.

An embodiment of the present invention will be explained below with reference to FIG.

A long and narrow hole is provided at the bottom of the water supply tray 1, and a guide plate 3 is provided.
is in contact with the upper surface of the heat transfer tube 4 through these holes, and the upper part of the side plate 3 is in contact with the hole in the water supply tray 1. The support plate 2 fixes the guide plate 3 and forms a gap of a certain width so that sprayed water can flow appropriately, and the gap between the toilets functions as a watering hole.

The sprinkler system of the evaporative cooler having the above structure first stores water sent by the water supply pump in the water supply tray 1.

The water accumulated in the water supply tray 1 flows out from the water sprinkling hole formed at the bottom of the water supply tray 1, and flows along the guide plate 3.
Flow down. The side plate must be one on which a water film can easily spread, and a plate with a rough surface structure, a wire mesh, etc. are effective. The sprayed water forms a film-like water film on the surface of the side plate 30, and is retained in the film shape even when the sprayed water flows down to the uppermost heat transfer tube 4. This film-like spray water naturally flows down along the surface of the heat exchanger tubes 40 and is evenly distributed over the surfaces of the heat exchanger tubes 40 from the second stage onwards. Therefore, the entire surface of the heat transfer tube acts as an evaporation surface, improving heat transfer performance.

Since the amount of water sprayed is relatively small, the water sprinkling holes on the lower surface of the water supply tray 1 are small, and there is a possibility that they may become clogged if water scale or the like adheres to them after long-term use. To address this problem, equipment has been developed that completely prevents scale from occurring electrically. Although not shown in the figure, the air may flow horizontally or from the bottom to the top.

FIGS. 6 and 7 show other embodiments of the invention. When a finned tube is used as the heat transfer tube, one end of the guide plate 3 is in contact with the tip of the fin 6 of the finned tube 4a.

The other configurations are the same as the embodiment shown in FIG.
Is it the same code as the figure? I will omit the explanation.

According to this embodiment, the sprayed water that has naturally flowed down from the water supply tray 1 along the guide plate 3 is transferred to the fin tube 4 located at the uppermost stage.
The tip of each 71 n 6 of a? Wet the heat transfer surface between the fins. The fin tubes 4a of the second and subsequent stages are sprayed with all the sprayed water that has flowed down from the top fin tube in the same way as the top fin tube. For this reason, with conventional watering methods, water was only sprayed on a part of the heat transfer surface directly below the watering hole, but by implementing the present invention, it is possible to easily spray water on the fin tube surface over the entire length. Became.

FIG. 8 shows still another embodiment of the invention.

The guide plate 3 is an L-shaped plate with a kumquat comb on the surface or a side plate with a net on the surface. This watering device has one guide plate 3 fixed to a water supply tray 1. In this embodiment, configurations other than those described above are given the same reference numerals and explanations will be omitted. According to this example, 2
What function was performed using two support plates and a guide plate? Only one guide plate 3 is needed without any loss.

According to the present invention, since a film-like water film can be formed on the surface of the guide plate, there is an effect of uniformly spraying water over the entire heat exchanger tube over the entire length.

[Brief explanation of drawings]

Figures 1 and 3 are side views of a conventional water sprinkler system for an evaporative cooler, and Figure 2 is line I-I' line f! of Figure 1. FIG. 4 is a plan view taken along lines n- and n' in FIG. 3; FIG.
7 is a side view showing another embodiment of the present invention, FIG. 7 is a sectional view taken along the line 1n-in' in FIG. 6, and FIG. 8 is a sectional view showing still another embodiment of the present invention. 1... Water supply 'f, 1a... Water supply tray, 2... Support plate, 3... Guide plate, 4... Heat transfer f, 4a...
Fin tube, 5... bolt, 6... fin. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 3 Hundred Figure 8 Figure 8

Claims (1)

[Claims] A water supply tray is provided above the group of heat exchanger tubes arranged in multiple horizontal stages, a long and narrow groove is cut in the bottom of the water supply tray along the longitudinal direction of the heat exchanger tubes, and a water guide plate made of a hydrophilic material is provided between the groove and the upper part of the heat exchanger tubes. An evaporative cooler water sprinkler system characterized by: