Double-compressor air-source heat pump heating and heat supply system

Abstract

The present invention includes a unit part, a heating part, a heat supply part, and an intelligent control part. The unit part includes an air-source heat pump heating part, an electric heating part, a water pipeline fittings part and a control circuit part. The control circuit part can control the heating part to use different compressor according to the temperature of water and environment; if the outflow temperature cannot reach the standard that the electric heating part would work according to the difference of inflow and outflow temperature as well as the flow quantity, to the contrary, it won't work; if both of the air-source heat pump part and the control circuit part worked but the temperature still cannot reach the set temperature that the water flow regulating valve will used to make the water stay in constant temperature.

What is claimed: 
     
         1 . A double-compressor air-source heat pump heating and heat supply system, characterized in that, including a unit part, a heating part, a heat supply part and an intelligent control part;
 The unit part includes an air-source heat pump heating part, an electric heating part, a water pipeline fittings part, and a control circuit part; the control circuit part is used for controlling the air-source heat pump heating part on using different compressor combinations according to the detected inflow temperature and ambient temperature; the control circuit part is further used for controlling no output of the electric heating part when detecting that after compressor start-up, the outflow temperature reaches the set temperature; the control circuit part is further used for controlling the electric heating power required for the output of the electric heating part according to the detected inflow and outflow temperature difference as well as the flow quantity detected by the water pipeline fittings part when detecting that the outflow temperature cannot reach the set temperature; the control circuit part is further used for controlling the water pipeline fittings part on regulating the water flow via water flow regulating valve based on the detected temperature to make the water temperature constant when the air-source heat pump heating part and the electric heating part are both of full-power output and the outflow temperature has not reached the set temperature; the control circuit is further used for judging whether it is necessary to execute the heat supply command according to the detected indoor ambient temperature or floor heating coil temperature when receiving a heat supply command, specifically, execute the heat supply function when the indoor ambient temperature or floor heating coil temperature reaches the heat supply-required temperature, and close the heat supply function when detecting that the indoor ambient temperature or floor heating coil temperature reaches the shutdown temperature.   
     
     
         2 . The double-compressor air-source heat pump heating and heat supply system according to  claim 1 , characterized in that, the air-source heat pump heating part includes a first compressor, a second compressor, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, a sixth solenoid valve, a plate-type centralized heat exchanger, a plate-type heat supply heat exchanger, a first filter, a second filter, an expansion valve, a first evaporator, a second evaporator, a first pressure relief condenser, a second pressure relief condenser, a first pressure-relief throttling capillary, a second pressure-relief throttling capillary, a gas-liquid separator, fan blades, a motor, a first throttling capillary and a defrosting capillary, all of which are connected via pipelines, forming a closed heat pump heating and heat supply system; wherein, the first compressor, the second solenoid valve, the plate-type centralized heat exchanger, the plate-type heat supply heat exchanger, the first filter, the expansion valve, the first evaporator, the gas-liquid separator and the first compressor, all connected in succession, form the first heating and heat supply path of the first compressor system;
 the first compressor, the sixth solenoid valve, the plate-type heat supply heat exchanger, the first filter, the expansion valve, the first evaporator, the gas-liquid separator and the first compressor, all connected in succession, form the second heating and heat supply path of the first compressor system;   The first compressor, the fourth solenoid valve, the first pressure relief condenser, the first pressure-relief throttling capillary, the first evaporator, the gas-liquid separator and the first compressor, all connected in succession, form the pressure relief path of the first compressor system;   the first compressor, the first solenoid valve, the defrosting capillary, the first evaporator, the gas-liquid separator and the first compressor, all connected in succession, form the defrosting path of the first compressor system;   the second compressor, the third solenoid valve, the plate-type centralized heat exchanger, the second filter, the first throttling capillary, the second evaporator and the second compressor, all connected in succession, form the heating and heat supply path of the second compressor system;   the second compressor, the fifth solenoid valve, the second pressure relief condenser, the second pressure-relief throttling capillary, the second evaporator and the second compressor, all connected in succession, form the pressure relief path of the second compressor system;   
     
     
         3 . The double-compressor air-source heat pump heating and heat supply system according to  claim 1 , characterized in that, the electric heating part includes a heating unit component, a thyristor component, a first temperature controller, a second temperature controller, a cabinet, an inlet pipe of heating unit component, an outlet pipe of a heating unit component and a terminal block, etc. 
     
     
         4 . The double-compressor air-source heat pump heating and heat supply system according to  claim 1 , characterized in that, the water pipeline fittings part includes a water flow switch, a plate-type centralized heat exchanger, an electric water mixing valve, a water flow meter and a water flow regulating valve, all connected in succession, wherein, the water flow regulating valve is connected with the electric heating part. 
     
     
         5 . The double-compressor air-source heat pump heating and heat supply system according to  claim 1 , characterized in that, the control circuit includes a main control board and an operation panel, wherein the main control board includes an MCU, a temperature detection circuit and an electric heating power control circuit. 
     
     
         6 . The double-compressor air-source heat pump heating and heat supply system according to  claim 2 , characterized in that, the control circuit part is further used for controlling the operation of the fourth or the fifth solenoid valve according to the detected outflow temperature when over-temperature phenomenon occurs after selecting correct compressor combination. 
     
     
         7 . The double-compressor air-source heat pump heating and heat supply system according to  claim 4 , characterized in that, the control circuit part is further used for regulating the proportion of heat pump outflow and that of cold water inflow to outflow with the electric water mixing valve when over-temperature phenomenon occurs after selecting correct compressor combination. 
     
     
         8 . The double-compressor air-source heat pump heating and heat supply system according to  claim 5 , characterized in that, the intelligent control part includes the control circuit as well as a control terminal, a server and a wireless communication module; wherein the server is respectively connected with the control terminal and the wireless communication module via wireless network, the operation panel connects the main control board via the first RS485/232 communication circuit, and the wireless communication module, connected to the main control board through the second RS485/232 communication circuit, communicates with the control terminal via wireless network by taking the server as transfer station. 
     
     
         9 . The double-compressor air-source heat pump heating and heat supply system according to  claim 8 , characterized in that, the wireless communication module is integrated with the operation panel. 
     
     
         10 . The double-compressor air-source heat pump heating and heat supply system according to  claim 8 , characterized in that, the wireless communication module is integrated with the main control board.