Multi-stage inner pipe freeze-proofing system, freeze-proofing heat exchanger and application

Abstract

The invention discloses a multi-stage inner pipe freeze-proofing system, a freeze-proofing heat exchanger and application, belongs to the field of heat pump systems, and aims at solving the technical problem that a water pipe in a heat exchanging pipe is iced and cracked in case that an existing heat exchanger is powered off and outside heat cannot be utilized. The multi-stage inner pipe freeze-proofing system comprises an outer pipe in which an inner pipe is arranged, wherein the inner pipe is a hollow elastic hose; more than one partition is arranged in the inner pipe. Under the condition that water is charged, the inner pipe contracts to counteract the expanding volume caused by icing, so that the outer pipe can be prevented from being expanded and cracked due to icing; a hollow part of the inner pipe is full of inertial gas, so that the gas tightness and the water tightness are high; the gas is stable, and thus the safety and the stability are high; the inner pipe can only be influenced by the external pressure; one end of the inner pipe is provided with a fixed connector which is fixed to the outer pipe, and the other end of the inner pipe is a closed end which extends into the outer pipe. The multi-stage inner pipe freeze-proofing system realizes efficient heat exchanging and freeze proofing, and is simple in structure, low in price, and convenient to mount.

Description

technical field

[0001] The invention relates to the field of heat pump air conditioners, and more specifically relates to a multi-stage inner tube antifreeze system, antifreeze heat exchanger and application thereof. Background technique

[0002] The casing heat exchanger used in the air conditioner is the heat exchange between the refrigerant and the water to realize its function. The casing heat exchanger of the existing heat pump water heater is composed of a refrigerant pipe and a casing. The refrigerant pipe is arranged in the casing. It is made into a coil shape, and the surface of the coil-shaped casing is provided with an insulating layer. During use, since the casing heat exchanger is installed outdoors, when the outdoor temperature is lower than 0°C, the water in the casing may freeze, causing the casing and refrigerant pipes to freeze and crack easily. Because there is water in the casing heat exchanger, there is a risk of freezing damage naturally. In winter, w...

Images