Ultra-low temperature frequency conversion heat pump system and control method and device thereof
A heat pump system and control method technology, applied in refrigeration and liquefaction, refrigerators, refrigeration components, etc., can solve the problems of high cost, aging and failure of components, affecting the operation stability of the heat pump system, and achieve strong stability and stable operation. Enhance and reduce costs
Inactive Publication Date: 2019-03-08
GUANGDONG PHNIX TECH CO LTD
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Problems solved by technology
However, the ultra-low temperature jet enthalpy heat pump system currently on the market requires multiple pressure sensors on the hardware, which is costly and increases the risk of component aging and failure, which greatly affects the operation stability of the heat pump system under ultra-low temperature conditions.
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[0055] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0056] refer to figure 1 , an ultra-low temperature variable frequency heat pump system, including an evaporator, a four-way valve, a water exchange tank, a plate heat exchanger, an enthalpy increasing frequency conversion compressor, an enthalpy increasing throttling device, a fan, a main throttling device, a controller and a first to a seventh temperature sensor;
[0057] The first temperature sensor is installed at the exhaust outlet of the enthalpy-increasing inverter compressor; the first temperature sensor is used to collect the temperature of the exhaust outlet of the enthalpy-increasing inverter compressor, that is, the temperature Ta at point a.
[0058] The second temperature sensor is installed in the water exchange tank; the second temperature sensor is used to collect the temperature of the water in the water exchange tank, that i...
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The invention discloses an ultra-low temperature frequency conversion heat pump system and a control method and device thereof. The control method comprises the following steps that the temperature Taof an exhaust outlet of an enthalpy-increasing frequency conversion compressor, the temperature Tb of water in a heat exchange water tank, the temperature Tc of an enthalpy-increasing inlet of a plate heat exchanger, the temperature Td of an enthalpy-increasing outlet, the temperature Te of an evaporation inlet of an evaporator, the temperature Tf of an evaporation outlet and the ambient temperature Tg are obtained; according to Tb, a heating step is started or stopped, specifically, the heating step comprises the following steps that a fan is adjusted according to Tb and Tg; a main road throttle device is adjusted according to Te and Tf; the enthalpy-increasing frequency conversion compressor is adjusted according to Tb; and according to Ta, Tc, Td and Tg, the enthalpy-increasing throttling device is adjusted. According to the ultra-low temperature frequency conversion heat pump system and the control method and device thereof, pressure data is replaced by collected temperature data,so that the cost is reduced in hardware; and meanwhile, the stability of a temperature sensor is stronger than that of a pressure sensor, so that the operation stability of a heat pump system is enhanced under the ultra-low temperature condition. The ultra-low temperature frequency conversion heat pump system and the control method and device thereof can be widely applied to the heat pump system.
Description
technical field [0001] The invention relates to a heat pump system, in particular to an ultra-low temperature variable frequency heat pump system and its control method and device. Background technique [0002] Due to the emergence of the ultra-low temperature jet enthalpy heat pump system, the problem of poor heating capacity and low energy efficiency encountered in heating and heating in most cold areas in my country has been solved, and the application of air source heat pump technology in my country has reached a new height. However, the ultra-low temperature jet enthalpy-increasing heat pump system currently on the market requires multiple pressure sensors on the hardware, which is costly and increases the risk of component aging and failure, which greatly affects the operation stability of the heat pump system under ultra-low temperature conditions. Contents of the invention [0003] In order to solve the above technical problems, the object of the present invention ...
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Login to View More IPC IPC(8): F25B49/02
CPCF25B49/02F25B49/022
Inventor 莫顺权彭玉坤梁晓恩
Owner GUANGDONG PHNIX TECH CO LTD