A heat recovery water pump control method and system
A technology of heat recovery and water pumps, which is applied in pump control, liquid variable capacity machinery, machines/engines, etc., can solve the problems such as the large impact of the opening time sequence system, the reduction of low-voltage protection faults, and the large impact, so as to achieve improved operation Reliability and service life, intelligent and effective control, effect of increasing effectiveness
Active Publication Date: 2017-03-22
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0003] However, from the point of view of practical application, the start-up time sequence of the heat recovery water pump and compressor has a greater impact on the system, which is mainly affected by the temperature of the heat recovery water inlet
A large number of experiments have shown that when the heat recovery inlet water temperature is low, if the unit compressor is turned on first, the heat recovery water pump is turned on later, and after the heat recovery is turned on, due to the low inlet water temperature, a large amount of condensed liquid will be generated in the heat recovery device and enter the condensation The secondary evaporation of the evaporator will affect the normal control of the throttling device, resulting in insufficient liquid supply to the evaporator, a rapid drop in low pressure, and finally a low-voltage protection failure.
And when the heat recovery water temperature is relatively high, the condensation effect in the heat recovery device is not strong
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[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0057] like figure 1 As shown, it is a heat recovery water pump control method disclosed in the embodiment of the present invention, including:
[0058] S101, detecting the temperature of the heat recovery water tank;
[0059] When it is necessary to control the heat recovery water pump in the heat recovery screw unit, the temperature of the heat recovery water tank in the heat recovery screw unit is first detected to obtain the real-time temperature of the h...
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The invention discloses a heat recovery water pump control method which comprises the following steps: detecting the temperature of a heat recovery water tank; and when the temperature of the heat recovery water tank is less than or equal to a first preset value, judging whether a compressor is started within the first preset time, if so, generating a first control command and controlling the heat recovery water pump to keep the closed state according to the first control command, and if not, generating a second control command and starting the heat recovery water pump according to the second control command. The method can comprehensively control the heat recovery water pump according to the starting time of the compressor and the temperature of the heat recovery water tank, thereby enhancing the effectiveness of control on the heat recovery water pump and further enhancing the operational reliability and service life of the set. The invention also discloses a heat recovery water pump control system.
Description
technical field [0001] The invention relates to the technical field of heat recovery water pumps, in particular to a heat recovery water pump control method and system. Background technique [0002] At present, the start and stop of the heat recovery water pump in some heat recovery screw units is controlled according to the temperature of the heat recovery water tank, that is, when the reheat recovery function mode is turned on, when the temperature of the water tank is lower than a certain set value, the heat recovery water pump is turned on. When the temperature of the water tank is higher than a certain set value, the heat recovery water pump is turned off. [0003] However, from the point of view of practical application, the start time sequence of the heat recovery water pump and the compressor has a greater impact on the system, which is mainly affected by the temperature of the heat recovery water inlet. A large number of experiments have shown that when the heat re...
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IPC IPC(8): F04B49/06
Inventor 黄凯亮钟海玲孙雷鸣胡乾龙王建凯
Owner GREE ELECTRIC APPLIANCES INC