1 casing:
The refrigeration capacity of the chiller in general there are 4, 6, 8, 12 and 25kW and so on cooling capacity in 12KW following models because of its important lighter, all made of aluminum alloy frame, inside the tin coating door and all loads, such as the weight of the water tank, pumps and compressors framework all welded by angle iron bottom support for support and fixed. Foot of the bottom bracket connected to the lower part of the rubber, the completion of the whole machine vibration; rubber feet and the ground to form a gap and the door gap can form natural convection to complete the natural cooling compressor and water pump. And more than 12KW of the machine is more heavy, consider more than just, it is done into the iron frame, but its structure is generally the same as above.
2 refrigeration system and cooling water circulation system
It is composed of a single stage refrigeration system with R22 as working fluid and a water pump as the power of the cooling water circulation system. The two systems are connected by the evaporator (the graph is a schematic diagram of the system. Refrigeration systems, such as filters, or split type cold water machine, indoor, outdoor machine connecting pipes and valves; water system, such as: water filter and a variety of purposes, for the sake of simplicity are not painted. From above, we can see, and the load on the refrigeration system is by the "host" (such as accelerator and nuclear magnetic resonance (NMR) heating equipment) and pump CO produced, selection of the pump efficiency became the premise of optimization design, please see the following example.
In the early and mid 90's, we have designed a cold water machine for the same heat engine. The main parameters of the host side are as follows: (1) the heat capacity of the main engine is 7KW; (2) the pump flow is 2m3/h, the head is 50 meters. In the face of such a small flow, big head, but also with a stainless steel pump, it is difficult to buy. The multi search results, the motor power is 7.5KW. The extensive collection of non-standard pump product samples, the same pump, motor power 1.1kw, for the design of the second cold water machine, the power of the compressor, the condenser and the evaporator area and overall outlook size decreased a lot. As an example, a deep impression: energy saving, key production options.
3 electrical control: there are two kinds of traditional mechanical and electrical control and computer control. The former is easy to repair, the price is cheap; the latter water tank temperature display is intuitive, but the price is more expensive, the maintenance personnel requirements are higher, not detailed.