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Method for slowering frosting speed of heat exchanger outside air-source heat pump chamber and heat pump

An air source heat pump, outdoor side technology, applied in lighting and heating equipment, damage protection, refrigeration components, etc., can solve problems such as energy consumption

Inactive Publication Date: 2005-07-06
HENAN XINFEI ELECTRICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This phenomenon is especially serious when the atmospheric temperature is low and the relative humidity is high. When the frost layer of the outdoor heat exchanger develops to a certain extent, it must be defrosted, and defrosting requires energy consumption.
According to statistics, the energy consumed for defrosting accounts for 10-20% of the total energy consumption of the heat pump, which offsets the energy-saving effect of the heat pump to a certain extent

Method used

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  • Method for slowering frosting speed of heat exchanger outside air-source heat pump chamber and heat pump
  • Method for slowering frosting speed of heat exchanger outside air-source heat pump chamber and heat pump
  • Method for slowering frosting speed of heat exchanger outside air-source heat pump chamber and heat pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1. An air source heat pump, comprising an outdoor heat exchanger (first row of heat transfer tubes) 1 and a cooling and drying device (second row of heat transfer tubes) 2' connected in series to the refrigerant circulation pipeline. Spacing δ of fins 3 on the first row of heat transfer tubes 1 1 Same as the original heat exchanger, the distance between the fins 4' on the second row of heat transfer tubes 2' is compared with the original heat exchanger by δ 2 increased to δ 3 . In use, the low-temperature refrigerant liquid first passes through the heat transfer tube 2', and exchanges heat and moisture with the air through the heat transfer tube 2' and the fins 4' on it to reduce the humidity of the air; the dried air then enters the heat transfer tube The tube 1 and the fins 3 above it perform heat and moisture exchange. Through this arrangement, most of the moisture in the air frosts on the heat transfer tube 2' and the fins 4' above it; the frost on the...

Embodiment 2

[0027] Embodiment 2. An air source heat pump. A cooling and drying coil 8 connected in series is added to the air inlet side of the existing outdoor heat exchanger. The diameter D of the cooling and drying coil 8 is smaller than that of the first row of heat transfer tubes 1 and the second row. The diameter d of the second row of heat transfer tubes 2. During the heating operation of the heat pump, the liquid supercooled refrigerant first passes through the cooling and drying coil 8, where the air is dried, and most of the moisture in the air frosts here; the heat transfer tube 1 and the fins 3 on it And the amount of frosting on the heat transfer tube 2 and the fins 4 above it is greatly reduced. In this way, the number of defrosts of the heat pump can be reduced. During defrosting, the high-temperature refrigerant gas first passes through the cooling coil 8, and then enters the heat transfer tubes 1 and 2. In this way, the frost layer is easily removed and the defrosting t...

Embodiment 3

[0028] Embodiment 3 In this embodiment, heat transfer steel wires 9 are welded on the outer wall of the cooling and drying coil 8 , and the steel wires 9 on both sides of the coil 8 are arranged in a staggered arrangement. By adding heat transfer steel wires, the cooling and drying effect of the air can be increased, and the frosting speed on the heat transfer tube 1 and the fins 3 on it and the heat transfer tube 2 and the fins 4 on it can be slowed down. Others are the same as embodiment 2.

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Abstract

This invention to air source heat pump outdoor exchanger frozen slow-down method and its air source heat pump, which belongs to air condition technique field. The method is to cool down the air before it enters the outdoor heat exchanger. The air source heat pump comprises outdoor exchanger and the cooling and drying device in series connection with the exchanger. The drying device and the exchanger both adopt fin pipe exchanger, wherein the cooling and drying device both are set with disc pipe with heat conductive wires.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a method for slowing down the frosting speed of an outdoor heat exchanger of an air source heat pump and an air source heat pump adopting the method. Background technique [0002] The air source heat pump unit can absorb the heat in the atmospheric environment through the outdoor heat exchanger, which has dual effects of energy saving and environmental protection, and has been widely used all over the world. Accompanying drawing 1 is an existing outdoor heat exchanger of an air source heat pump, the diameter of the first row of heat transfer tubes 1 and the second row of heat transfer tubes 2 is the same, which is 9.52mm; the fins on the two rows of heat transfer tubes The spacing δ 1 and δ 2 The same, generally between 1.0-3.0mm; the width of the fins is 22mm. When the air source heat pump is running in winter, when the surface temperature of the fin surf...

Claims

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Application Information

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IPC IPC(8): F25B47/00
Inventor 饶荣水周泽申建军蔡咏鸿余海霞秦新娟
Owner HENAN XINFEI ELECTRICAL EQUIP
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