CN205718080U - Finned heat exchanger and air-conditioner - Google Patents

Abstract

This utility model provides a kind of finned heat exchanger and air-conditioner.According to finned heat exchanger of the present utility model, including heat exchange fin and the heat exchanger tube being located in heat exchange fin, heat exchange fin windward side end face is L1 with the distance of heat exchanger tube axis, and heat exchange fin leeward side end face is L2 with the distance of heat exchanger tube axis, wherein, L1 ＞ L2.This utility model is by making the heat exchange fin windward side end face distance with heat exchanger tube axis more than heat exchange fin leeward side end face and the distance of heat exchanger tube axis, also will heat exchange fin asymmetric arrangement, heat exchanger tube is suitably offset to leeward side, thus the exchange capability of heat of the heat exchange fin at the thermoexcell back side, the mean outlet temperature making air increases, heat exchange amount increases, thus improves the overall heat exchange performance of heat exchanger.

Description

Finned heat exchanger and air-conditioner

Technical field

This utility model relates to air-conditioner field, in particular to a kind of finned heat exchanger and air-conditioner.

Background technology

Finned heat exchanger is widely used in the industry such as power, chemical industry, refrigeration, therefore changes for finned heat exchanger Heat and the research of resistance performance, significant.Finned heat exchanger fin configuration in refrigeration plant presses fin shape, processing The distribution form of method and fin surface can be divided into various ways, it is possible to carries out enhanced heat exchange effect from many aspects.

Utility model content

This utility model aims to provide a kind of finned heat exchanger that can improve heat exchange property and air-conditioner.

This utility model provides a kind of finned heat exchanger, including heat exchange fin and the heat exchange being located in heat exchange fin Pipe, heat exchange fin windward side end face is L1 with the distance of heat exchanger tube axis, heat exchange fin leeward side end face and heat exchanger tube axis Distance is L2, wherein, and L1 ＞ L2.

Further, 1.1≤L1/L2≤1.5.

Further, L1/L2=1.3.

Further, heat exchanger tube is heat exchange copper tube.

Further, heat exchange fin is heat exchange aluminium flake.

This utility model additionally provides a kind of air-conditioner, including aforesaid finned heat exchanger.

According to finned heat exchanger of the present utility model and air-conditioner, by making heat exchange fin windward side end face and heat exchanger tube axle The distance of line more than the distance of heat exchange fin leeward side end face and heat exchanger tube axis, also will heat exchange fin asymmetric arrangement, will Heat exchanger tube suitably offsets to leeward side, thus the exchange capability of heat of the heat exchange fin at the thermoexcell back side, make averaging out of air Mouth temperature increases, and heat exchange amount increases, thus improves the overall heat exchange performance of heat exchanger.

Accompanying drawing explanation

The accompanying drawing of the part constituting the application is used for providing being further appreciated by of the present utility model, of the present utility model Schematic description and description is used for explaining this utility model, is not intended that improper restriction of the present utility model.At accompanying drawing In:

Fig. 1 is the principle schematic according to finned heat exchanger of the present utility model；

Fig. 2 is the schematic diagram that heat exchange amount changes along with L1/L2；

Fig. 3 is the schematic diagram that pressure drop changes along with L1/L2.

Description of reference numerals:

10, heat exchange fin；20, heat exchanger tube.

Detailed description of the invention

Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.

As it is shown in figure 1, according to finned heat exchanger of the present utility model, including heat exchange fin 10 be located in heat exchange fin 10 In heat exchanger tube 20, the distance of heat exchange fin 10 windward side end face and heat exchanger tube 20 axis is L1, the leeward side of heat exchange fin 10 The distance of face and heat exchanger tube 20 axis is L2, wherein, L1 ＞ L2, this utility model by by heat exchange fin 10 asymmetric arrangement, Heat exchanger tube 20 is suitably offset to leeward side, thus the exchange capability of heat of the heat exchange fin 10 at thermoexcell 20 back side, make air Mean outlet temperature increase, heat exchange amount increases, thus improves the overall heat exchange performance of heat exchanger.

Specifically, in Fig. 1, label A show airflow direction, and due to the windward side at heat exchanger tube 20, fluid connects with fin Contacting surface is long-pending relatively big, and corresponding air is the biggest with the heat transfer temperature difference of fin surface, and exchange capability of heat is stronger；Otherwise, at heat exchanger tube 20 Leeward side, can be formed stream owing to air skims over heat exchanger tube 20 so that air is less with the heat transfer temperature difference of fin surface, air Temperature also change not quite, exchange capability of heat weakens, and defines heat exchange dead band at the copper pipe back side.Along with supporting or opposing in heat exchanger tube 20 center The skew of wind side so that heat exchanger tube 20 back side heat exchange dead zone area reduces, thus enhances the exchange capability of heat at heat exchanger tube 20 back side, The heat exchange amount making air increases.

Preferably, definition tube hub is defined as A=L1/L2, at wing with the ratio of windward side on air flow and leeward side In the case of sheet width is constant, by changing the relative position at finned tube center, obtain different A values, and comprehensive descision is different Flowing under wind friction velocity and heat transfer characteristic, in the hope of obtaining optimal A value.

It is highly preferred that 1.1≤L1/L2≤1.5, give under different air intake flow velocity in conjunction with Fig. 2 and Fig. 3, heat exchange amount With pressure drop understands along with the variation relation analysis between tube hub to the ratio of fin edges distance respectively.Can from figure Go out, along with the increase of inlet flow rate, increase the air disturbance at fin surface, enhance the heat exchange efficiency of fin, increase Heat exchange amount；Coefficient of friction increases simultaneously, increases the pressure loss.Additionally, along with copper pipe skew downstream, the heat exchange amount of fin First increasing and reduce afterwards, the heat exchange amount of upstream skew fin is gradually reduced or almost unchanged.By what analog result was obtained Data are analyzed, and L1/L2=1.3 is the optimum that tube hub arrives the distance proportion of fin edges at the same conditions.

Preferably, heat exchanger tube 20 uses heat exchange copper tube, heat exchange fin 10 to use heat exchange aluminium flake, it is possible to improve heat exchange further Efficiency.

This utility model additionally provides a kind of air-conditioner, uses aforesaid finned heat exchanger, it is possible to be effectively improved heat exchange effect Rate, improves air-conditioner heat exchange property.

As can be seen from the above description, this utility model the above embodiments achieve following technique effect:

According to finned heat exchanger of the present utility model and air-conditioner, by making heat exchange fin 10 windward side end face and heat exchanger tube The distance of 20 axis more than the distance of heat exchange fin 10 leeward side end face and heat exchanger tube 20 axis, also will heat exchange fin 10 non-right Claim to arrange, heat exchanger tube 20 is suitably offset to leeward side, thus the exchange capability of heat of the heat exchange fin 10 at thermoexcell 20 back side, The mean outlet temperature making air increases, and heat exchange amount increases, thus improves the overall heat exchange performance of heat exchanger.

The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for this For the technical staff in field, this utility model can have various modifications and variations.All in spirit of the present utility model and principle Within, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.

Claims (6)

1. a finned heat exchanger, including heat exchange fin (10) and the heat exchanger tube (20) that is located in described heat exchange fin (10), It is characterized in that,

Described heat exchange fin (10) windward side end face is L1 with the distance of described heat exchanger tube (20) axis, described heat exchange fin (10) Leeward side end face is L2 with the distance of described heat exchanger tube (20) axis, wherein, and L1 ＞ L2.

Finned heat exchanger the most according to claim 1, it is characterised in that

1.1≤L1/L2≤1.5。

Finned heat exchanger the most according to claim 2, it is characterised in that

L1/L2=1.3.

Finned heat exchanger the most according to claim 1, it is characterised in that

Described heat exchanger tube (20) is heat exchange copper tube.

Finned heat exchanger the most according to claim 1, it is characterised in that

Described heat exchange fin (10) is heat exchange aluminium flake.

6. an air-conditioner, including finned heat exchanger, it is characterised in that described finned heat exchanger is arbitrary in claim 1 to 5 Finned heat exchanger described in Xiang.