Gas heat pump air conditioner heat recovery system and control method thereof
A gas heat pump and heat recovery technology, applied in heat recovery systems, air conditioning systems, heating methods, etc., can solve problems such as frequent switching of control units, sharp fluctuations in cooling water temperature, and unreasonable heat recovery of flue gas from air source gas heat pumps.
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Embodiment 1
[0026] Such as figure 1 As shown, this embodiment proposes a gas heat pump air-conditioning heat recovery system, including a flue gas discharge system, a refrigerant system, a cooling water system and a domestic hot water system;
[0027] The flue gas discharge system includes the exhaust end of the gas engine 1, the heat medium passage of the first flue gas heat exchanger 2, the muffler 3, the heat medium passage of the second flue gas heat exchanger 4, and post-processing equipment 5, which are connected in sequence, The cold medium channel of the second flue gas heat exchanger 4 is connected to any pipeline of the domestic hot water system;
[0028] The cooling water system is used to collect the waste heat of the cylinder liner 6 of the gas engine 1 and the waste heat of the primary flue gas, and the water output end of the cylinder liner 6 is connected to the cold medium channel of the first flue gas heat exchanger 2;
[0029]The refrigerant system includes a compressor...
Embodiment 2
[0037] Such as figure 2 As shown, on the basis of Embodiment 1, due to structural design restrictions or cost considerations, the third solenoid valve 13 can be eliminated, and the first heat recovery device 9 can be placed before the buffer water tank.
Embodiment 3
[0039] A heat recovery control method for a gas-fired heat pump air conditioner, which is used in the heat recovery system for a gas-fired heat pump air-conditioner described in Embodiment 1, including a cooling and heating mode, a first heating mode, a second heating mode, and a third heating mode. The above-mentioned cooling and heating mode is used for refrigeration or multi-connected high-temperature heating. According to the heat transfer capacity of the refrigeration cycle, the heat transfer capacity of the first heat recovery device 9 and the outdoor radiator 15 are respectively used as evaporators of the cooling water system. If the second If the heat exchange capacity of a heat recovery device 9 is stronger than that of the outdoor radiator 15, the first heating mode is selected; otherwise, the second heating mode is selected. The first heating mode is used for multi-connected systems or the third heat recovery device is not activated 17 cold and hot water units for he...
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