Heat recovery type machine set liquid jet control method and system
A control method and heat recovery technology, applied in the heating and ventilation control system, space heating and ventilation control input, heating mode, etc., can solve the problems of liquid return and high exhaust temperature, so as to avoid liquid return and improve reliability sexual effect
Active Publication Date: 2015-05-20
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0005] Based on this, it is necessary to address the defects and deficiencies of the prior art and provide a heat recovery type unit liquid injection control method and system to solve the problems of liquid return and high exhaust temperature when the unit works under low temperature and high load conditions. question
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[0038] The embodiments of the liquid injection control method and system for a heat recovery unit provided by the present invention, such as Figure 1 to Figure 2 Shown.
[0039] An embodiment of the liquid injection control method for a heat recovery unit provided by the present invention, such as figure 1 As shown, including the following steps:
[0040] S100: Detect the suction pressure and discharge pressure of the compressor. When the suction pressure and discharge pressure exceed the preset target pressure operating range, open the liquid injection electronic expansion valve and adjust the opening of the liquid injection electronic expansion valve to Preset the initial number of steps for liquid injection.
[0041] As an implementation manner, the suction pressure and the discharge pressure of the compressor are respectively detected by the high pressure sensor and the low pressure sensor, so as to determine the pressure operating range of the compressor.
[0042] The target pr...
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The invention discloses a heat recovery type machine set liquid jet control method and a system. The heat recovery type machine set liquid jet control method comprises the steps of detecting a suction pressure and a discharge pressure of a compressor, opening an electronic liquid jet expansion valve when the suction pressure and the discharge pressure exceed a preset target pressure operation range and adjusting the opening of the electronic liquid jet expansion valve to a preset initial step number to conduct the liquid jet; detecting the discharge temperature of the compressor and continuously adjusting the opening of the electronic liquid jet expansion valve from the initial step number when the discharge temperature is greater than or equal to a preset target discharge temperature till the discharge temperature is detected smaller than the target discharge temperature; detecting the discharge superheat degree of the compressor after the discharge temperature is detected smaller than the target discharge temperature and adjusting the opening of the electronic liquid jet expansion valve when the discharge superheat degree exceeds a preset target discharge superheat degree range so that the discharge superheat degree can be within the target discharge superheat degree range. By means of the heat recovery type machine set liquid jet control method and the system, the discharge temperature of the compressor is reduced, the occurrence of liquid backflow is avoided, and the operation reliability of the machine set is improved.
Description
Technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a liquid injection control method and system for a heat recovery type unit. Background technique [0002] The heat recovery unit can realize the secondary use of heat energy and reduce the direct energy consumption and emissions. With the rapid economic development and the increasing improvement of people's living standards, domestic hot water supply and air conditioning in public places and personal residences have become common demands. In this context, heat recovery units are increasingly popular. [0003] The heat recovery unit needs to operate in a wide ambient temperature range, especially in winter, when the ambient temperature drops to -10~-15℃, the hot water production capacity of the heat recovery unit will decrease accordingly, but this time When the hot water demand is highest (usually the hot water outlet temperature is as high as 55℃), the unit will work...
Claims
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IPC IPC(8): F25B49/02F24F11/00
CPCF24F11/30F24F11/83F24F11/84F24F11/89F24F2110/00
Inventor 位静夏光辉张龙爱王传华卓明胜廖荣陈万兴
Owner GREE ELECTRIC APPLIANCES INC