Heat exchange amount measurement method and device for multi-split type air conditioning system

Abstract

The invention provides a heat exchange amount measurement method and device for a multi-split type air conditioning system. The method includes the following steps that: the fifth mass flow rate of amixture composed of a refrigerant and lubricating oil at the second outlet of a four-way valve is obtained according to the principle of the conservation of energy entering and exiting from componentsin the multi-split type air conditioning system; the eleventh enthalpy value of the mixture at the main loop outlet of a recooler is obtained; the fifth enthalpy value of the mixture at the second outlet of the four-way valve is obtained; the refrigerating capacity of the multi-split type air conditioning system is obtained according to the fifth mass flow rate, the fifth enthalpy value and the eleventh enthalpy value; and/or the eighth enthalpy value of the mixture at the second outlet of an oil separator is obtained, and the heating capacity of the multi-split type air conditioning system is obtained according to the fifth mass flow rate, the eighth enthalpy value and the eleventh enthalpy value. With the heat exchange amount measurement method and device of the invention adopted, the problem that the measurement result of the heat exchange amount of the multi-split type air conditioning system in the prior art is inaccurate can be solved.

Description

technical field [0001] The invention relates to the technical field of refrigeration and air-conditioning equipment, in particular to a method and device for measuring heat transfer of a multi-connected air-conditioning system. Background technique [0002] During the actual use of the multi-connected air-conditioning system, due to the influence of factors such as climate conditions, installation location, usage and load conditions, there is a large gap between its field performance and the test performance in the laboratory. Therefore, the measured multi-connected air-conditioning system The actual performance of the air conditioning system during use has always been an urgent problem in the industry. At present, the on-site measurement technology of power consumption is relatively mature, but the cooling (heat) capacity cannot be accurately measured, so it is difficult to analyze the actual performance of the multi-connected air-conditioning system, which is not conducive...

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Problems solved by technology

[0006] In view of this, the present invention provides a method and device for measuring the heat transfer of a multi-connected air-conditioning system to solve the problem of inaccurate measurement results of the heat transfer of a multi-connected air-conditioning system in the prior art

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