DE2935075A1 - Air conditioning system cooling equipment - has immersion type pump with filter removably mounted in lower part of housing - Google Patents

Abstract

The cooling equipment is for an air-conditioning system, particularly an evaporative cooler or liquefier, having a fan mounted on a housing and with a pipe coil in the path of the air current generated by the fan. The coil is bypassed by a water sprayer connected by a standpipe to a pump. The pump (27) is removably mounted in the lower part of the housing (G), while the standpipe (22) runs up a sidewall (2,3,4) inside the housing and along to the sprayer (21). The pump can be of the immersion type, preceded by a filter, while the standpipe can be of flexible material.

Description

Cooling device for air conditioning or the like with internal Pump;

The invention relates to a cooling device for air conditioning systems or the like, in particular for evaporative coolers or evaporative condensers with a fan arranged on a housing and upstream in the air flow generated by it Coiled pipe system, which is connected by a riser is spanned with a pump connected spray device for water. .

The usual evaporative condensers have a coil system made of full-walled and hot-dip galvanized steel tubes, which are inclined lengthways and with a Special liquid collecting piece is equipped to an unimpeded Ensure the drainage of the condensate «The smallest distance between the pipes is about 30 mm. the Connection pieces for a refrigerant fed through the pipe coil system from top to bottom protrude from the housing out.

-2-

130011 / 034A

The water is sprayed through self-cleaning hollow cone spray nozzles made of dirt-repellent material. These Spray nozzles achieve a fine spray of water with a pre-pressure of only 0.4 atü and their arrangement ensures for even water distribution. In the case of an evaporative cooler with a closed circuit, this flows in Cooling water (primary circuit) enters the pipe coil system at the top via a pipe distributor and leaves it below via a collecting tank. The water is then available for cooling a consumer, for example a condenser or a plastic injection molding machine. Since it is is a closed water cycle, there is no water loss in the primary cycle. During the Water recooling of the primary circuit must be the outer surface of the pipe coil system housed in the housing with water of the secondary circuit are sprayed. Fresh air, Simultaneously blown in from below in countercurrent to the sprayed water, heats and saturates in contact with it Water and the wetted pipe coil system and flows out upwards. Recooled water of the secondary circuit collects in the tub and is used again for spraying, which is the case with known devices a pump arranged laterally outside the housing takes place, which transfers the water collected in the tub a riser, also located outside the housing, feeds the spray device.

This arrangement has the disadvantage that the sump water level must always be high enough in the housing that the pump is filled and no air can be drawn in. This increases significantly the weight of the system.

13001 1 / 03U

2-93 & Q75 '

Κϋ-£ 310?

The side pump connection facilitates the formation of vortices in the sump water, which in turn reduces the undesirable effects Air intake is promoted by what-about Upstream of a filter inside the housing with an antivortex plate can be prevented.

Another significant disadvantage of the known device with an external pump is susceptible to cold, in order to prevent the pump from freezing in winter, must she z. B. electrically with an immersion heater od. Like. Heated. Of course, this also applies to the external riser.

The attachment of the pump to the housing requires a mechanical one Reinforced attachment, which can only be achieved by being as rigid as possible Änschlussstutzen and riser is reached.

The pump makes a lot of noise during operation, which is the result of frequent use of the system in residential areas or areas with a predominantly residential character leads to considerable discomfort, so that additional encapsulation or sound-absorbing Measures are necessary.

The external pump has a disruptive effect both during transport and when setting up due to the increased space requirement " the end"

The inventor has set himself the goal of developing a device of the type mentioned which does not have these disadvantages having.

The solution to this problem is that the pump is removable is arranged in the lower part of the housing and - the riser pipe inside the housing on a side wall along to the spraying device "

300

\ ₆ _ 2 ⁹³ 50

This arrangement has the major advantage that space-consuming and annoying devices on the one hand No fittings front. The space saving is 8 to, depending on the version. 30%.

It is also possible to put two evaporative coolers back to back, which z. B. during transport or during Installation of several coolers in a building has advantages. This applies inter alia. then when the connections for the water of the primary circuit from the side Side panels are led out.

The possibility of damage to the pump system during transport or due to the effects of the weather becomes practical locked out.

There is no need to heat the pump or the risers during the cold season, so that heating costs are saved will.

The noises of the pump are attenuated by the housing by approx. 25 dB (= steel wall 2 mm thick). That means a favorable influence on the noise emission, u. a. in residential areas.

The pump is preferably arranged at the bottom of the housing, which means the use of a water-insensitive Pump, e.g. B. a submersible pump, makes necessary * This the necessary water level to avoid unwanted air intake at the bottom of the tub is approx. 230 mm

13001

Water level in known devices to only about 150 mm reduced. This corresponds to an average Weight reduction from IO to 15%.

The fastening of the pump inside the housing is preferably carried out in such a way that it can be easily replaced by a fitting in the front of the fitting existing inspection door serviced or removed can be. A strong mechanical attachment to the housing is not necessary. This also means that the riser made of flexible material, e.g. B. plastic or rubber, can be formed, which is inexpensive and saves space.

The riser pipe leads straight from the pump past recessed headers and parts of the pipe coil system directly to the spray lance. The use of materials is kept as low as possible and the pressure loss is also kept to a minimum decreased.

A separate antivortex filter or the like can be omitted. A filter is preferably connected directly upstream of the pump, which prevents vortices or the Used to secrete impurities.

Overall, the device requires less manufacturing time, as essential drilling and fastening operations for There is no need for a pump or riser. In addition, the housing information of the lower necessary water level can be lower be interpreted.

—15—

130011/0344

Κϋ-310 _ g _ · - ^

Further advantages, features and details of the invention emerge from the following description of a preferred one Embodiment and based on the drawing; this shows the longitudinal section in its single figure through a cooling device.

An evaporation cooler K has a rectangular base plate 1, a cuboid housing G from a fitting front 2, side panels 3 and a fan side 4; the latter carries a radial fan on an attachment nozzle 5 6, which has a belt drive 7 with a three-phase squirrel cage motor 8 is connected.

On the fitting front 2, near the base plate 1, there is a fresh water connection 10, a water outlet pipe 11 and an overflow 13 with automatic water drainage. The opening of the fresh water connection 10 provided in the housing G is connected to a float 14 controlled volume regulator. The swimmer 14 rests on the surface or the mirror 15 of the swamp water 16, which is collected in a collecting trough 17.

A multi-level pipe coil system runs above the collecting trough 17 18 made of solid steel tubing. It is preferably designed to be inclined longitudinally.

Spray pipes 21 run above the pipe coil system 18, via a riser 22 with a throttle valve 23 with a pump 25 arranged on the base plate 1 with an upstream Pump filters 27 are connected; hochgepuraptes water W of the so-called secondary circuit Z is through

13001 1 / 03U

KU-310 - ~ 3 -

Nozzles 26 of the spray tube 21 sprayed above the pipe coil system 18, falls onto the pipe system 18 and cools this.

The water to be cooled of the so-called primary circuit y enters the upper connection 30 via collector 32 the pipe system 18 and leaves this after passing through the collector 33 at the lower connection 311, the secondary water W is optionally pre-cooled. before it the pipe system 18 reached. The nozzle 30 and 31 can also - not shown - on the side of the "side panels 3 to be appropriate.

The air flow is indicated by χ in the drawing made.

The pump 25 can be serviced through an inspection door 35 will.

130011/0344

-AO-

e e r s e

ite

Claims (6)

PATENT CLAIMS 1. Cooling device for air conditioners or the like, in particular for evaporative coolers or evaporative condensers with a fan arranged on a housing and in the air flow generated by this upstream pipe coil system , which is spanned by a spray device for water connected to a pump via a riser is/ identified by this, that the pump (25) is removably arranged in the lower part of the housing (G) and the riser (22) inside the housing (G) along a side wall (2,3,4) leads to the spray device (21). 2. Cooling device according to claim 1, characterized in that that the pump is firmly attached in the lower part of the housing (G). 3 »cooling device according to one of claims 1 or 2, that? characterized in that the pump (25) is a submersible pump. 4. Cooling device according to at least one of claims 1 to 3 _S, characterized in that the pump is preceded by a pump filter » -Ä 2- 130011/0 34 4 _. . ■ "2935Q75 KU-310 Λ -A 5. Cooling device according to one of claims 1 to A, characterized in that the riser pipe (22) consists of flexible material. 6. Cooling device according to at least one of the claims 1 to 5, characterized in that the pipe coil system (18) has lateral exits on the side panels (3). 130011/0344