Variable-frequency heat source tower heat pump water chiller-heater unit

Abstract

The invention discloses a variable-frequency heat source tower heat pump water chiller-heater unit. A compressor and a fan of the variable-frequency heat source tower heat pump water chiller-heater unit are controlled by a frequency converter, and the variable-frequency heat source tower heat pump water chiller-heater unit comprises the compressor, a condenser, an evaporator, an expansion valve, a heat source tower, an economizer and an oil separator; an inlet of the oil separator is connected with the inverter compressor, an outlet of the oil separator is connected with the condenser, an outlet of the condenser is connected with an inlet of the economizer, an outlet of the economizer is connected with an inlet of the expansion valve, an outlet of the expansion valve is connected with an inlet of the evaporator, and an outlet of the evaporator is connected with the compressor; and the heat source tower is connected with a water inlet and outlet of the evaporator through an electric three-way valve and is connected with a water inlet and outlet of the condenser through an electric three-way valve. The heat source tower heat pump water chiller-heater unit adopts frequency conversion control, energy consumption of the whole water chiller-heater unit is reduced, and efficiency is improved. The invention further discloses a frequency conversion adjusting mode and an oil cooling regeneration mode of the heat source tower heat pump water chiller-heater unit.

Description

technical field [0001] The present invention relates to a frequency conversion refrigeration and heating device, in particular to a cooling and heat source tower combined with a low heat source heat pump, which is suitable for summer working conditions and winter working conditions under "low temperature and high humidity" environmental conditions. Refrigeration and heating device with frequency conversion adjustment - heat source tower heat pump. Background technique [0002] The existing central air-conditioning cold and heat source systems have their own advantages and disadvantages: water ground source heat pumps take into account both cooling and heating, and have high efficiency, but are limited by geographical conditions and require high initial investment. The phenomenon of heat imbalance affects heat exchange; the chiller plus boiler has high cooling efficiency and compact structure, but the boiler heating energy utilization rate is low; the air source heat pump has...

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Problems solved by technology

[0005] Technical problem: The purpose of this invention is to solve the problem of relatively low cooling performance and heating performance when the heat source tower heat pump unit uses a fixed-frequency compressor, especially at part load, and does not satisfy the customer's need for high energy efficiency and saving at part load. Energy demand issues, and frequency control required issues in terms of the above

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