Hot pump system with variable capacity

Abstract

A variable capacity heat pump system, which comprises the separate device and the main system, the separate device is set between the first throttling gear and the crossing of the condensator exit and the compressor exit, which consist of the rectified column and the water storage tank which fill the working substance with low boiling-point. The system is that changes the thickness of the working substance by the separation and distills of the high and low boiling-point working substance, which can fulfill the need of different capability. The invention can avoid the damage of lack oil of compressor.

Description

technical field [0001] The invention relates to a compression heat pump system, in particular to a variable capacity heat pump system. Background technique [0002] A heat pump is a device that utilizes high-level energy to make heat flow from a low-level heat source to a high-level heat source, but the heat it supplies is the sum of the high-level energy consumed and the low-level energy absorbed. It has obvious energy-saving effects in winter heating. However, the characteristics of the heat pump system determine that during heating in winter, the energy output of the heat pump and the consumption of the building have an opposite trend with the decrease of the ambient temperature, which will inevitably affect the need for comfort and weaken the advantages of the heat pump. The variable capacity adjustment technology of mixed working fluid is applied to the heat pump system, which can make the heat pump system meet the high load demand in low temperature environment. For ex...

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Problems solved by technology

Since the energy is obtained from the system through a heat exchanger, there will inevitably be a loss of heat transfer temperature difference, which will affect the temperature required for the rectification process, thereby affecting the rectification effect; in addition, this method also increases the piping of the system , making the system complex and increasing manufacturing costs

Both USA patent 5012651 and Chinese patent 03141556.3 have liquid storage tanks rich in high-boiling point working fluid. When the system is expanded, the compressor lubricating oil is also stored in the liquid storage tank while storing high-boiling point working fluid, so that the lubricating oil cannot It is brought back to the compressor through the system circulation, so the compressor is prone to oil shortage and damage

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