Bidirectional phase equilibrium heat exchanger, air conditioner and heat pump water heater

Abstract

The invention provides a bidirectional phase equilibrium heat exchanger, comprising a fin group, a first heat exchange tube, a second heat exchange tube, a first inlet-outlet tube and a second inlet-outlet tube, wherein the first heat exchange tube and the second heat exchange tube are inserted into the fin group, the first and second heat exchange tubes are respectively positioned in the first heat exchange zone and the second heat exchange zone of the fin group, when in use, the heat exchange efficiency of the first heat exchange zone is higher than the heat exchange efficiency of the second heat exchange zone, the second heat exchange tube is provided with a first end and a second end which are respectively connected with the first and second inlet-outlet tubes, the first end and the second end are respectively used as an inlet end and an outlet end in the evaporation state, and are respectively used as an outlet end and an inlet end in the condensation state, and a flow resisting structure is arranged in a runner which leads to the second inlet-outlet tube from the second end of the second heat exchange tube. The bidirectional phase equilibrium heat exchanger can balance the fluid resistance of forward evaporation and reserve condensation, and realizes high-efficiency evaporation and high-efficiency condensation, so that the utilization rate of the heat exchanger is improved. The invention also provides an air conditioner and a heat pump water heater adopting the bidirectional phase equilibrium heat exchanger.

Description

Technical field [0001] The invention relates to a heat exchanger, in particular to a two-way phase balance heat exchanger, and an air conditioner and a heat pump water heater adopting the two-way phase balance heat exchanger. Background technique [0002] At present, energy saving has become the theme of the times and has attracted great attention. To improve the energy efficiency of air conditioners (for example, household air conditioners, central air conditioners, etc.) and heat pump water heaters (for example, air source, water source, and ground source heat pump, etc.), it is generally possible to increase the heat exchange area of ​​the heat exchanger, increase the air volume, Measures such as increasing the size of the box and the air duct, and increasing the diameter of the blades, but the implementation of these measures may greatly increase the cost of the product, or increase the noise of the product, thereby reducing the comfort of the product and greatly reducing the...

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Problems solved by technology

However, in essence, the above-mentioned common shunting method is relatively one-sided. The reasons are as follows: first, the use of small-diameter rectification will inevitably cause a certain internal resistance loss; second, the effect of small-diameter rectification will be affected by the fluid For liquid fluids, if the rectifier with small diameter is used to produce effect, the reduction ratio of the rectifier tube diameter and the tube length must be enlarged a lot, so that the internal loss will increase correspondingly. ;Third, by extending the flow of the low-efficiency heat exchange area to balance the internal resistance, to reduce the fluid flow into this area, in essence, the area of ​​the low-efficiency heat exchange area is enlarged in disguise, and part of the potential of the heat exchanger is lost ; Fourth, for the dual-purpose system of evaporation and condensation, the above split method will show its inherent limitations. For the heat exchanger, the split flow is relatively uniform in the evaporation state, but the reverse of the system makes the heat exchanger use When condensing, the heat exchanger may have a very uneven split, so that the reverse condensation performance can only be compensated by losing part of the evaporation performance. As a result, the relatively good evaporation is also weakened, resulting in uniform evaporation and condensation effects. not ideal

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