FR2770897A1 - Self-contained water cooling system used in plastics manufacture - Google Patents

Abstract

The cooling system consists of a compressor (1) connected by a high-pressure pipe (2) to a condenser (3) linked to a coolant gas cylinder (4) which is connected, in turn, to a distributor (9) inside an evaporator (10) contained in a tank (11) of a heat insulating liquid, and linked to the compressor by a low-pressure pipe and hydraulic circuit. The hydraulic circuit contains a water pump which is connected to the tank (11) by a flexible tube, and to the machinery to be cooled. The tank (11) is connected to the machinery by a galvanized pipe.

Description

 The monobloc water cooler is a device suitable for machines that require constant cooling of liquid in a closed circuit.

 The mastery of this technique aims to ensure production for an effectively proven profitability. This effect also ensures the longevity of machines subjected to the effects of heat.

 In a plastic and other processing unit, the water cooler is necessary for the operation of the machines and for the finishing of the products and has the effect of increasing the rate and the exact reproduction of the mold imprint.

 The water cooler is an essential element in all processing of plastic products. It is adjustable to the liquid temperature required by the functionality values of the machines; it is used to maintain the temperature in the hydraulic circuits and that of the molds.

 The power of a cooler is determined by the value of the compressor and is measured in refrigeration / hour, its electrical consumption in watt / hour and its rotation speed in revolutions / minute.

 The semi-hermetic or hermetic compressor, as the case may be, is connected to a battery which allows it to play its role of cooler.

 The control panel is located on a rectangular panel inclined to the upper right: this allows a good reading from near or far, ensures good visibility and good ease of handling.

 On the rear side is fixed a panel which frames the condenser. On the left side there is a movable panel which gives access to the compressor, the cooling water tank and the various electrical and refrigerating components: pressure switch, solenoid valve, regulator, dehydrator, liquid bottle.

 On the right side, three valves connected to the water pump, the first of which ensures the departure of the liquid, the second the inlet to the tank and the third the filling.

 A water sight glass is used to maintain the level of the cooling tank.

 The chassis is reinforced by square tube which allows better machine support and mobility comfort.

 The set has four movable wheels.

 The refrigeration circuit of the cooler comprises a hermetic or semi-hermetic compressor (1).

 The gases sucked in by the compressor are discharged through the high pressure piping (2) to the condenser (3). This condenser is connected to the bottle (4) of the refrigerant gas tank such as that sold under the registered trademark FREON by the company Dupont de Nemours.

 At the outlet of the bottle, the refrigerant gas passes through the dehydrator (5).

The gases, continuously discharged, pass through a solenoid valve (6) and pass through a liquid sight glass (7) to reach the regulator (8). The latter is connected to a distributor (9) located in an evaporator (10) contained in a tank of heat-insulated liquid (11).

 The outlet of the evaporator (10) is connected to the compressor (1) by low pressure piping (12). On the upper level of the cover are fixed the fans (13). These are located under the upper face of the cooler which is inclined from the rear part towards the front part; thus, when the fan (13) propels hot air, this is not taken up again through the condenser.

 The hydraulic circuit is composed of a water pump (1 ') connected to the tank by a rubber hose (2') which absorbs vibrations and prevents leaks and water flow.

 The role of the pump is to suck the liquid from the lower part of the tank (11) for heat-insulated liquid to inject it through a galvanized tube (5 ') towards the cooling machine.

 The liquid thus injected into the machine returns to the tank (11) through a galvanized tube (7 ').

 The inlet and outlet of the liquid at the level of the tank must have an opposite orientation to allow efficient and appropriate treatment. The outlet for the liquid sucked in (3 ') by the pump is located on the lower side of the tank, the return from the machines is located at the top of the opposite side above the outlet.

 The tank (11) is filled with liquid by a valve (10 '). The pipes in galvanized tube for the outlet and return of the liquid are each provided with a shut-off valve (11 '). At the top of the tank is located a piece of tube fitted at its end (12 ') with a sight glass to see the level of the liquid. Between the tank and the sight glass on the tube is connected a piece of pipe (13) to discharge the overflow below the chassis of the cooler. The entire piping is connected by elbows (14) and union fittings (15).

 The mark (10) represents the evaporator contained in the liquid container.

The mark (17) represents the inlet and outlet of the refrigerant gas such as a
Freon, registered trademark.

 As a rule, liquid coolers are intended to operate in workshops or premises, for reasons of convenience.

 They must be placed in a ventilated place to allow the evacuation of hot air.

When it is started up, the electrical voltage (the fuses) must be checked and
make sure that the pump and the fans turn in the right direction.

Claims (3)

 1. Monobloc water chiller characterized in that it comprises on the one hand, a compressor (1) connected by a high pressure pipe (2) to a condenser (3) connected to a bottle (4) of refrigerant gas connected to a distributor (9) located in an evaporator (10) contained in a tank of heat-insulated liquid (11) and connected to the compressor (1) by a low-pressure pipe (12), and, on the other hand, a hydraulic circuit.  2. Monobloc water cooler according to claim 1, characterized in that the hydraulic circuit comprises a water pump (1 ') connected to the tank of heat-insulated liquid (11) by a hose (2') and to a machine to be cooled, which is connected to said tank by a galvanized tube (7 ').  3. Monoblock water cooler according to claim 2, characterized in that the outlet of the liquid sucked in by the pump (1 ') is located at the lower part of one side of the tank and the return coming from the machine cool at the top on the opposite side.