Integrated high-temperature frequency-variable heat pump heating air conditioning system

Abstract

The invention relates to an air conditioning system and particularly relates to an integrated high-temperature frequency-variable heat pump heating air conditioning system. The air conditioning system comprises a frequency-variable intermediate gas-supplementing scroll compressor, a plate type heat exchanger, a finned condenser, a finned evaporator, a main thermostatic expansion valve, a normally-opened electromagnetic valve, a gas-liquid separator, a drying filter, a normally-closed electromagnetic valve, a branch thermostatic expansion valve, an axial flow condensation fan, an axial flow evaporation fan, a pipeline, a high-pressure detection valve, a low-pressure detection valve, a high-pressure switch, a low-pressure switch and a liquid observing mirror. In order to overcome the disadvantages of the prior art, the integrated high-temperature frequency-variable heat pump heating air conditioning system is adopted; the compressor adopts a special frequency-variable intermediate gas-supplementing scroll compressor for a high-temperature heat pump; the displacement of the compressor is controlled by adjusting the operation frequency of the compressor, and the heating capacity on a condensation side is dynamically adjusted, so that the inner temperature of a curing barn is controlled, and the temperature control accuracy of the curing barn is ensured.

Description

technical field [0001] The invention relates to an air-conditioning system, in particular to an integrated high-temperature variable-frequency heat pump heating and air-conditioning system. Background technique [0002] Existing high-temperature heat pump heating and air-conditioning units are vapor compression air-source heat pump air-conditioning units. The unit itself consumes part of the electric energy, and most of the heat is absorbed by the ambient medium—the heat in the air. After increasing the temperature through the heat transfer working fluid circulation system, it releases heat to the closed barn that needs to be heated. The traditional heat pump heating unit is mainly composed of five parts: compressor, condenser, evaporator, condenser fan and evaporator fan. Heat pump heating units usually adopt a split design, that is, the compressor, evaporator, and evaporator fan are designed as an outdoor unit, and the condenser and condensing fan form an indoor unit. Th...

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Problems solved by technology

Since the adjustment of temperature accuracy depends on frequent start and stop of the B system compressor, the operation reliability of the B system compressor is reduced, and the constant frequency compressor is frequently started and stopped, and the thermal inertia of the system causes the temperature of the barn to fluctuate greatly, and it is easy to exceed the set temperature Accuracy, not conducive to the realization of the baking process

[0006] 3. In the existing high-temperature heat pump heating and air-conditioning system, when the temperature of the barn is close to 70°C, due to the high condensation temperature, the compressor discharge pressure and discharge temperature are basically close to the critical point of the refrigerant (R134a), and the compressor load is close to the limit. Reduce compressor exhaust efficiency, making it difficult to reach the predetermined oven temperature

[0007] 4. The dual system of the existing technology consumes a lot of power, and the energy efficiency ratio of the product is low (the comprehensive COP is not greater than 4), which does not conform to the concept of energy saving and emission reduction

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