Simple refrigerating unit

Abstract

The invention discloses a simple refrigerating unit which comprises a frame, a compressor and a condenser, wherein a cooling medium inlet, a cooling medium outlet, a cooling medium cycle inlet and a cooling medium cycle outlet are formed on the condenser, and the cooling medium is freon; the condenser is horizontally installed on the frame; the compressor is installed at the upper end of the condenser; a high-pressure outlet of the compressor is communicated with the cooling medium inlet of the condenser; the cooling medium outlet of the condenser is connected with a cooling pipe which is communicated with an inlet of a coil pipe and / or a reaction kettle jacket; a throttle expansion valve is arranged on the cooling pipe; and a low-pressure inlet of the compressor is connected with a return pipe which is communicated with an outlet of the coil pipe and / or the reaction kettle jacket. According to the refrigerating unit provided by the invention, a cooling water tank, an evaporator and two water pumps are saved, which in turn reduces the equipment number and lowers the cost; and meanwhile, the heat exchange efficiency is improved, and the purposes of energy conservation and environmental protection are achieved.

Description

technical field [0001] The invention relates to a simple refrigerating unit, in particular to a simple refrigerating unit for reaction kettles that require low-temperature reactions in processes such as chemical, pharmaceutical and food factories. Background technique [0002] Some products in chemical, pharmaceutical, and food factories need to be reacted at low temperature, and sometimes the temperature needs to be quickly lowered below -40 degrees. At this time, refrigeration units are needed to achieve temperature reduction. At present, the usual refrigerating unit mainly includes a compressor, an evaporator, a condenser, a frozen water tank, a water pump, etc. The high-pressure outlet of the compressor is connected to the refrigerant inlet of the condenser, and the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator. The refrigerant outlet of the device is connected to the low-pressure inlet of the compressor, so that the above co...

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Problems solved by technology

[0003] The above-mentioned structure has the following defects: 1. In the above-mentioned refrigerating unit, after the refrigerant is exported from the condenser, it needs to conduct a heat exchange with the brine in the freezing water pool, resulting in a relatively low cooling efficiency; 2. The above-mentioned brine Generally, it is water, brine or ethylene glycol (ethylene glycol is more environmentally friendly but the price is higher), and the secondary refrigerant is supplied to the reactor jacket and / or coil or coil by the water pump after being lowered to a certain low temperature by the refrigerating unit Circulation, contact with the material to absorb heat, thereby cooling the material

The lower the temperature required for the material, the higher the concentration of the refrigerant, and the greater the cost. If salt water is used as the carrier, impurities will accumulate and precipitate after long-term use, which will affect the water quality of the refrigerant and reduce the heat transfer efficiency. The higher the temperature requirements for thermal insulation, the higher the requirements for sealing and thermal insulation of frozen water pools, which also increases the cost of the enterprise; 3. The above-mentioned refrigerants are difficult to recycle when not in use, thus failing to achieve the purpose of energy conservation and environmental protection ; 4. The above-mentioned refrigerating unit adopts an evaporator and a cooling water tank, and has strict requirements on thermal insulation of the cooling water tank, and uses two water pumps, which requires a lot of equipment, high manufacturing costs, and high power consumption of the water pumps

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