Impeller, water flow switch, heat exchanger and air energy heat pump water heater

Abstract

The invention discloses an impeller, a water flow switch, a heat exchanger and an air energy heat pump water heater. The impeller capable of accurately detecting the flow of a pipeline comprises a huband blades, and the side edges, connected with the hub, of the blades intersect with plain lines of the outer circumferential surface of the hub. The impeller can accurately detect the flow in the pipeline, so that the action of the corresponding water flow switch is more accurate, and the safety of the whole heat exchanger and the whole air energy heat pump water heater is protected.

Description

technical field [0001] The invention relates to pipeline flow detection technology, in particular to an impeller capable of accurately detecting pipeline flow, a water flow switch, a heat exchanger and an air energy heat pump water heater using the impeller. Background technique [0002] With continuous breakthroughs and innovations in heat pump technology, the use of heat exchangers such as casing and shell and tube is increasing. Under the vigorous promotion of the northern coal-to-electricity market, heat pump products have ushered in opportunities, but it also brings huge challenges to heat pump units in the cold winter. As one of the core components of the unit, the heat exchanger plays a vital role, but when the temperature is too low, the heat exchanger freezes and cracks, which becomes one of the reasons for the damage of the unit or the scrapping of the whole unit at low temperature, and the insufficient water flow is the cause of the replacement. The main reason f...

AI Technical Summary

Problems solved by technology

As one of the core components of the unit, the heat exchanger plays a vital role, but when the temperature is too low, the heat exchanger freezes and cracks, which becomes one of the reasons for the damage of the unit or the scrapping of the whole unit at low temperature, and the insufficient water flow is the cause of the replacement. The main reason for the freezing and cracking of the heater

Because the water in the pipe freezes, the heat exchanger is easy to be swollen and cracked, and the damage of the heat exchanger will cause the water circuit to communicate with the fluorine circuit; at this time, the operating unit may suck water into the compressor, causing the compressor to be damaged, and the water entering the evaporator to freeze and swell , so that the entire unit will be scrapped

[0003] However, the water flow switch used in the existing heat exchanger cannot accurately detect the water flow, and it is easy to fail to operate when the water flow meets the requirements, or to malfunction when the requirements are not met. For example, in the existing patent with the publication number CN202394809U, It discloses an intermediate water-conducting pulse water flow switch, which adopts an impeller structure, and its straight blades are parallel to the axis of the hub. The problem that the water flow rate meets the requirement, but the flow switch does not act

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