CN2484517Y

CN2484517Y - Heat exchanger for air conditioner

Info

Publication number: CN2484517Y
Application number: CN 01235642
Authority: CN
Inventors: 张智; 金培耕; 江从发; 梁健华
Original assignee: Midea Group Co Ltd
Current assignee: Midea Group Co Ltd
Priority date: 2001-04-23
Filing date: 2001-04-23
Publication date: 2002-04-03
Anticipated expiration: 2011-04-23

Abstract

The utility model relates to a heat exchanger for an air conditioner, which comprises an indoor unit, an outdoor unit and a connecting pipe. The indoor unit and the outdoor unit have one heat exchange which comprises two rows of copper pipes and fins, wherein a diameter of the front row of copper pipe is shorter than the back one; a width of the front row of fin is shorter than the back one; a thickness of the front row of the fine is thinner than the back one; the fin is in flat, wave, strip or shutter shape. Under the same working state, the utility model improves 10-15 percent of heat exchanging, aggrandizes 5-10 percent of air quantity, realizes heat exchanging balance between the front row and the back row, increases total heat exchange quantity to improve whole performance of the air conditioner and corresponding lowers production costs.

Description

A kind of air-conditioner heat exchanger

The utility model relates to a kind of air-conditioner, is meant the heat exchanger that is made of copper pipe and fin in the air-conditioner especially, and this dual-row heat exchanger front and rear row adopts the fin of copper pipe, different in width and the shape of different-diameter.

Existing commercially available idle call heat exchanger generally is meant condenser or evaporimeter, basically be that double-row type is traditional, promptly adopt the copper pipe of same diameter, the fin of same form in face of the front row (first row) of air-flow with back row, wherein not only width is identical, thickness is identical, the calking form is also identical for fin.Through experimental test as can be known, in such condenser or evaporimeter, back row's heat exchange amount approximately only accounts for 20%～25% of total heat exchange amount, and the greatest differences of front and rear row heat exchange amount has caused the overall exchange capability of heat of condenser or evaporimeter not high.Its reason is in heat transfer process, after outside air flows through front-seat and fin heat exchange, temperature will reduce in evaporimeter, in condenser, then will raise, when such air-flow enters back row and copper pipe and fin heat exchange, the temperature difference of air-flow mean temperature and rear copper pipe and fin reduces, and makes the heat transfer temperature difference of back row's heat transfer temperature difference less than the front row, arranges the heat exchange amount of heat exchange amount much smaller than the front row after the institute.In addition, the difference of front and rear row heat exchange amount and temperature has also caused thermal stress inhomogeneous, will influence stability of structure.

The purpose of this utility model provides a kind of heat exchanger that overcomes above-mentioned disadvantage, makes the heat exchange amount equilibrium of front and rear row, and total heat exchange amount increases.

Designed a kind of air-conditioner heat exchanger according to above-mentioned purpose, comprise indoor set, off-premises station and interconnective pipeline thereof, each is by a heat exchanger of being made up of two row copper pipes and fins in indoor set and the off-premises station, wherein S-type rotating copper pipe is the muscle beam, fin is installed on the copper pipe piecewise in regular turn with the form of fence, and wherein the diameter of front-seat copper pipe is 4≤φ ₂≤ 11 millimeters; The diameter of rear copper pipe is 5≤φ ₁≤ 12 millimeters.As seen, front-seat copper pipe diameter is less than rear copper pipe diameter, and the diameter difference is controlled at 1≤φ ₁-φ ₂≤ 8 millimeters.

Also can design a kind of air-conditioner heat exchanger according to above-mentioned purpose, comprise indoor set, off-premises station and interconnective pipeline thereof, each is by a heat exchanger of being made up of two row copper pipes and fins in indoor set and the off-premises station, wherein S-type rotating copper pipe is the muscle beam, fin is installed on the copper pipe piecewise in regular turn with the form of fence, and wherein the width of front-seat fin is 10≤d ₂≤ 24 millimeters; The width of back row's fin is 12≤d ₁≤ 25 millimeters.As seen, front-seat fin width is less than back row's fin width, and stand out is controlled at 2.0≤d ₁-d ₂≤ 15 millimeters.

In above-mentioned two kinds of embodiments, fin thickness d is 0.09≤d≤0.20 millimeter, and fin shape is plain film, corrugated plate, bar seam sheet or shutter matrix.Wherein, front-seat fin thickness d ₂Be less than or equal to back row's fin thickness d ₁, thickness difference is 0≤d ₁-d ₂≤ 0.06 millimeter.During enforcement, front-seat fin thickness scope is 0.08mm≤d ₂≤ 0.14mm, back row's fin thickness scope is 0.08mm≤d ₁≤ 0.20mm.

To the utility model and prior art products, use general in the world liquid and thermal conduction study software for calculation FLUENT (U.S. FLUENT company product) to carry out the calculating comparative analysis, result of calculation shows, under identical air quantity, the air flow resistance on the heat exchanger of the present invention has reduced 15～20% than the flow resistance of original prior art; Under identical blower fan condition of work, heat exchange amount of the present invention has increased 10～15% than prior art, and air quantity has increased 5～10%, and back row's heat exchange amount shared ratio in total heat exchange amount rises to 35～40%.Simultaneously, the copper pipe that the present invention uses and the gross weight of fin are less than the gross weight of the copper pipe and the fin of the use of prior art, and the economical with materials cost surpasses 15%.

Accompanying drawing 1 is the utility model assembly structure schematic side view;

Accompanying drawing 2 is prior art assembly structure schematic side view.

From accompanying drawing as seen, basic point of the present utility model is that the diameter of front-seat copper pipe or the width of fin and the diameter of rear copper pipe or the width of fin there are differences.The scheme of design comprises:

1, the diameter of front-seat copper pipe is less than the diameter of rear copper pipe, front-seat copper pipe diameter range be 4mm to 11mm, rear copper pipe diameter range be 5mm to 12mm, front and rear row copper pipe diameter differ scope at 1mm (containing 1mm) between the 8mm (containing 8mm);

2, front-seat fin width is less than back row's fin width, front-seat fin width scope be 10mm to 24mm, back row's fin width scope be 12mm to 25mm, and the front and rear row fin width differ scope at 2.0mm (containing 2.0mm) between the 15mm (containing 15mm).

In the specific implementation, can adopt in scheme 1 and the scheme 2 any one, also can operational version 1 and the combination of scheme 2, decide on concrete physical dimension and heat exchange amount.Give among the figure and shown airflow direction, air is after flowing through front row and copper pipe and fin heat exchange like this, variations in temperature is less relatively, with back row's the copper pipe and relative increase of the temperature difference of fin, strengthened back row's heat exchange amount, overall exchange capability of heat improves, and since front and rear row copper pipe diameter or fin overall width reduce, overall material is saved, and the reduction of air current flow resistance, can obtain bigger air quantity under identical blower fan condition of work.

The present invention there are differences on front and rear row copper pipe diameter and fin width, also can be inconsistent at aspects such as front and rear row fin thickness, calking forms, the fin form can adopt plain film, corrugated plate, bar seam sheet, flap type etc., and general front-seat fin form should be simpler or identical than back row's fin form.Simultaneously, front-seat fin thickness should be less than or equal to back row's fin thickness, be exactly the heat exchange amount of the balanced front and rear row of general purpose, total the heat exchange amount is increased.

Claims

1, a kind of air-conditioner heat exchanger, comprise indoor set, off-premises station and interconnective pipeline thereof, each is by a heat exchanger of being made up of two row copper pipes and fins in indoor set and the off-premises station, wherein S-type rotating copper pipe is the muscle beam, fin is installed on the copper pipe piecewise in regular turn with the form of fence, and the diameter that it is characterized in that front-seat copper pipe is 4≤φ ₂≤ 11 millimeters;

The diameter of rear copper pipe is 5≤φ ₁≤ 12 millimeters.

2, heat exchanger according to claim 1 is characterized in that described front-seat copper pipe diameter less than rear copper pipe diameter, and the diameter difference is 1≤φ ₁-φ ₂≤ 8 millimeters.

3, a kind of air-conditioner heat exchanger, comprise indoor set, off-premises station and interconnective pipeline thereof, each is by a heat exchanger of being made up of two row copper pipes and fins in indoor set and the off-premises station, wherein S-type rotating copper pipe is the muscle beam, fin is installed on the copper pipe piecewise in regular turn with the form of fence, it is characterized in that the width d of front-seat fin ₂Be 10≤d ₂≤ 24 millimeters;

The width d of back row's fin ₁Be 12≤d ₁≤ 25 millimeters.

4, air-conditioner heat exchanger according to claim 3 is characterized in that described front-seat fin width less than back row's fin width, and stand out is 2.0≤d ₁-d ₂≤ 15 millimeters.

5, according to claim 1 or 2 or 3 described air-conditioner heat exchangers, it is characterized in that described fin thickness is 0.09≤d≤0.20 millimeter, fin shape is plain film, corrugated plate, bar seam sheet or shutter matrix.

6,, it is characterized in that the thickness d of described front-seat fin according to claim 1 or 2 or 3 described air-conditioner heat exchangers ₂The thickness d that is less than or equal to back row's fin ₁, thickness difference is 0≤d ₁-d ₂≤ 0.06 millimeter.