Outdoor condensing unit for split air conditioners

Abstract

An outdoor condensing unit of a split-type air conditioner, including a refrigerant condenser, the input port of the refrigerant condenser is connected to the compressor through the refrigerant inlet joint on the oil tank cover, and the output port of the refrigerant condenser is connected through the oil tank cover The refrigerant outlet joint on the top is connected to the capillary tube. The heat dissipation medium of the refrigerant condenser is cooling oil. The refrigerant condenser is immersed in the cooling oil in the oil tank and transfers heat to the cooling oil. The oil tank and the cooling oil radiator pass through two pairs The oil inlet and outlet flanges form a circulation loop. The cooling oil flows in the circulation loop and transfers heat to the cooling oil radiator. The heat dissipation medium of the cooling oil radiator is outdoor air, and the outdoor air flows through the cooling oil under the force of the axial flow fan. heat sink and remove heat from its metal surface. The invention has high heat exchanging efficiency, greatly saves power consumption under the same refrigeration effect, greatly improves the energy efficiency ratio, and effectively solves the problem of performance attenuation after the air conditioner is used.

Description

technical field [0001] The invention relates to an outdoor condensing unit of a split air conditioner, in particular to an outdoor condensing unit with oil-cooled and forced-air-cooled double cooling condensers. Background technique [0002] At present, there is no similar technology of the present invention in the technical field of the outdoor condensing unit of the split air conditioner. Closer technologies include air-cooled split air conditioner outdoor condensing unit and water-cooled split air conditioner outdoor condensing unit. Generally, there are two types of room air conditioners: integral type (that is, the combination of evaporator unit and condenser unit) and split type (structurally divided into indoor evaporator unit and outdoor condensing unit). Only split type room air conditioners have outdoor condensing units. The condenser in the outdoor condensing unit of the split room air conditioner is a heat exchanger that condenses the high-temperature and high-p...

AI Technical Summary

Problems solved by technology

Due to the poor heat transfer of air, the air-cooled condenser has a large volume and high production cost; in addition, there are two technical problems in the air-cooled condenser: 1. To improve the condensing capacity The refrigerant condenser must be enlarged, and the length of the refrigerant copper pipe must be increased to increase the refrigerant condenser, and the total amount of refrigerant must be increased. Due to the constraints of the air conditioner, the total amount of refrigerant cannot be infinite. Therefore, the technical solution of increasing the refrigerant condenser to improve the condensing capacity is limited by the impossibility of unlimited increase of the refrigerant. 2. The air-cooled condenser still has performance attenuation after the use of the air conditioner. This is because in order to improve the condensation ability, it is generally necessary to install a hydrophilic aluminum sheet on the condenser to increase the heat dissipation area and improve the heat dissipation capacity. However, the hydrophilic aluminum sheet is easy to oxidize, not resistant to corrosion, and the degradation of hydrophilic performance is relatively large. Fast, and because it is used outdoors, it is easy to accumulate dust and become dirty, which will cause the problem of continuous decline in condensation heat dissipation capacity and higher and higher power consumption.

Although the cooling system of the indoor condenser also adopts the oil-cooled type, there are three disadvantages as follows: 1. In order to achieve the purpose of the invention, the condensing system and the whole air-conditioning system are designed as an all-in-one unit placed indoors and isolated from the outdoors. As far as a large system composed of air-conditioning system and indoor space system is concerned, since the air-conditioning system needs to consume the electric energy provided by the outside world, part of it needs to be converted into heat energy (such as the heat generated by the operation of the compressor), and the whole system is If it is isolated from the outside, it is impossible to dissipate heat to the outside. According to the law of energy conservation, the heat energy of the entire large system can only increase but not decrease. In the end, the temperature of the indoor space system will not only not decrease but will rise, and air conditioning and cooling cannot be realized at all. Purpose

2. As far as the oil-cooled condenser part of the system is concerned, since the design of the condensing system is from outdoor to indoor, it is not only a change in the positional relationship in form, but a change in the substantive content, that is, the refrigeration in the condenser The heat of the solvent can only be exchanged with the indoor air through the oil-cooled radiator and cannot be exchanged with the outdoor air. Finally, when the indoor air temperature rises to close to the surface temperature of the oil-cooled radiator, the oil-cooled radiator loses its ability to radiate heat and condense. effect

3. As far as this kind of oil-cooled radiator is concerned, due to the heat exchange with the indoor air in the state of natural convection, and the radiator adopts the structure of a circular casing with a small heat dissipation surface area, the above-mentioned "adoption of increasing The technical solution to increase the condensing capacity of a large refrigerant condenser is limited by the fact that the refrigerant cannot be increased indefinitely, which determines that the inner tube used to flow the refrigerant in the circular casing cannot be designed too long, so its outer The design of the length of the tube is also limited, and the heat dissipation surface area cannot be effectively increased, and its heat dissipation capacity is extremely low, and it cannot achieve the purpose of condensing the gaseous refrigerant into a liquid refrigerant and then entering the evaporator unit for evaporation, heat absorption and refrigeration

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