89results about How to "Solve the problem of antifreeze" patented technology

The invention discloses a condensing heat recovery type air source-solar energy coupling heat pump air conditioning hot water system. The invention relates to a hot water system and aims at solving the problems in the prior art that an air source heat pump air conditioning system does not have the function of condensing heat recovery, thus heat is wasted, and urban thermal pollution can also be caused; and a direct expansion type solar heat pump hot water system and a solar direction production hot water system only have the heating function, do not have the refrigeration function and are largely influenced by weather conditions, so that the timeliness and the reliability of heating are both low. The condensing heat recovery type air source-solar energy coupling heat pump air conditioning hot water system comprises a compressor, an indoor unit, a four-way valve, an outdoor unit, a gas-liquid separator, a plate heat exchanger, a capillary tube, a double-pipeline flat plate solar collector, a water tank, a water pump, an electric three-way valve, an electric heater, a non-return valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a seventh electromagnetic valve and an eighth electromagnetic valve. The invention belongs to the field of heat conversion.

The invention provides a compact solar water heater with an anti-freezing emptying function. The compact solar water heater comprises a heat storage water tank and a water inlet and outlet pipe, wherein the tail end of the water inlet and outlet pipe is provided with a hot water outlet, a cold water inlet and a water discharging opening used for emptying the water inlet and outlet pipe, the water discharging opening is controlled by a water discharging valve, the cold water inlet is controlled by a water supply valve, a closing element for opening or closing a pipe opening is arranged on the pipe opening of the water inlet and outlet pipe positioned in an inner cavity of the heat storage water tank, a communication pipe vertically penetrates through the closing element, the communication pipe is communicated with an air space at the top of the inner cavity of the heat storage water tank and the water inlet and outlet pipe arranged under the closing element, a driving rod which downwards extends and can vertically move for driving the closing element to open or close the pipe opening of the water inlet and outlet pipe is fixedly arranged at the closing element or on the communication pipe arranged under the closing element, and the driving force of the driving rod is supplied by a driving mechanism. The compact solar water heater has the advantages that the complete emptying of the water inlet and outlet pipe is realized, the anti-freezing problem of the water heater is thoroughly solved, and the instant available effect of the solar water heater is realized.