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Parallel Flow Heat Exchangers and Room Air Conditioners

A technology for parallel flow heat exchangers and air conditioners, applied in evaporator/condenser, refrigeration and liquefaction, lighting and heating equipment, etc., can solve the problem of uneven temperature distribution in parallel flow heat exchangers, Reduced thermal efficiency, uneven flow of refrigerant, etc., to avoid uneven distribution of refrigerant, high heat exchange capacity and air conditioning energy efficiency, simple and reasonable structure

Inactive Publication Date: 2011-12-07
GUANGDONG MIDEA ELECTRIC APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the flow rate of the refrigerant in the far-end flat tube is much smaller than the flow rate of the refrigerant in the near-end flat tube, and it is easy to cause uneven flow of refrigerant, resulting in sufficient refrigerant flow in some flat tubes and insufficient refrigerant flow in some flat tubes. This will inevitably cause uneven temperature distribution in different positions of the parallel flow heat exchanger, thereby reducing the heat transfer efficiency of the parallel flow heat exchanger

Method used

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  • Parallel Flow Heat Exchangers and Room Air Conditioners
  • Parallel Flow Heat Exchangers and Room Air Conditioners
  • Parallel Flow Heat Exchangers and Room Air Conditioners

Examples

Experimental program
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Effect test

no. 1 example

[0027] see Figure 2-Figure 4 , the parallel flow heat exchanger includes a flat tube 1 arranged between the input header 3 and the output header 4, the flat tube 1 is provided with fins 2, and one end of the input refrigerant tube 5 is connected to the input header 3 are connected, one end 6 of the output refrigerant pipe is connected to the output header 4, and more than one first positioning hole is arranged on the side wall of the input header 3, and one end of the input refrigerant pipe 5 is inserted into the first positioning hole One end of the input refrigerant pipe 5 is closed, and one end of the input refrigerant pipe 5 is provided with more than one first small hole 5.1 communicating with the inside of the input header 3; and / or, on the side wall of the output header 4 More than one second positioning hole is provided, one end of the output refrigerant pipe 6 is inserted into the second positioning hole, one end of the output refrigerant pipe 6 is closed, and one en...

no. 2 example

[0034] see Figure 5 , in this embodiment, in order to make the distribution more uniform and the flow resistance smaller, more than one spacer 7 may be provided in the input header 3 and / or the output header 4 .

[0035] The input header 3 and / or the output header 4 are divided into N compartments through partitions 7 . The N partitions are not connected to each other. An input refrigerant pipe is placed in the middle of every two compartments. Each input refrigerant pipe and output refrigerant pipe independently enters and exits refrigerant, and each channel is relatively independent in the input header 3 and / or output header 4 without affecting each other.

[0036] The number of septal regions can be more than two, and the length of each septal region is 20mm-500mm.

[0037] See the first embodiment for the rest of the undescribed parts, and will not repeat them here.

no. 3 example

[0039] see Figure 6 , In this embodiment, the other end of the refrigerant input pipe 5 is connected to the flute-shaped pipe 8; and / or, the other end of the refrigerant output pipe 6 is connected to the flute-shaped pipe 8.

[0040] The input refrigerant pipe and the output refrigerant pipe can be connected through a flute-shaped pipe 8. When the refrigerant passes through the flute-shaped pipe 8, the refrigerant can be transported to each input refrigerant pipe and output refrigerant pipe, and then enter the input header and output respectively. Collector, and then into the flat tube.

[0041] Taking the parallel flow heat exchanger as an indoor evaporator as an example, the input header 3 and the output header 4 are placed horizontally. After being throttled, the refrigerant becomes gas-liquid coexistence state, passes through the flute-shaped pipe 8, and then enters the input refrigerant pipe. At this time, the arrangement direction of the input refrigerant pipe 5 is per...

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Abstract

A parallel flow heat exchanger and a room air conditioner, the parallel flow heat exchanger includes a flat tube arranged between an input header and an output header, the flat tube is provided with fins, and one end of the input refrigerant tube is connected to the input The headers are connected, and one end of the output refrigerant pipe is connected with the output header. More than one first positioning hole is arranged on the side wall of the input header, and one end of the input refrigerant pipe is inserted into the first positioning hole. One end of the input refrigerant pipe is closed, and one end of the input refrigerant pipe is provided with more than one first small hole communicating with the inside of the input header; and / or, the side wall of the output header is provided with more than one first small hole Two positioning holes, one end of the output refrigerant pipe is inserted into the second positioning hole, and one end of the output refrigerant pipe is closed. The invention has the characteristics of simple and reasonable structure, flexible operation, small flow resistance, uniform refrigerant distribution and wide application range.

Description

technical field [0001] The invention relates to a heat exchanger, in particular to a parallel flow heat exchanger and a room air conditioner. Background technique [0002] China is a country rich in aluminum resources but deficient in copper resources. The energy efficiency standards of air conditioners are increasing year by year, which will inevitably consume a large amount of copper resources, resulting in the risk of rapid rise in copper prices and shortage of copper resources. Therefore, the technology of replacing copper with aluminum will become an inevitable trend in the development of air-conditioning heat exchangers in the future. [0003] Parallel flow porous microchannel heat exchanger, referred to as parallel flow heat exchanger, is an all-aluminum heat exchanger. As a new type of heat exchanger for air conditioners, it is more and more widely used. However, existing parallel flow heat exchangers see figure 1 , only one input refrigerant pipe is welded on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B39/00
Inventor 李丰程志明徐龙贵黄小军黄剑云张智冬
Owner GUANGDONG MIDEA ELECTRIC APPLIANCES CO LTD
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