CN201340144Y

CN201340144Y - Fin heat exchanger

Info

Publication number: CN201340144Y
Application number: CNU2008201346401U
Authority: CN
Inventors: 陈越增; 邓军琦; 汪志强
Original assignee: NINGBO HICON INDUSTRY Co Ltd
Current assignee: NINGBO HICON INDUSTRY Co Ltd
Priority date: 2008-09-03
Filing date: 2008-09-03
Publication date: 2009-11-04
Anticipated expiration: 2018-09-03

Abstract

The utility model discloses a fin heat exchanger which comprises fins, a heat exchange copper tube and electrothermal tubes for postponing frosting. The heat exchange copper tube penetrates and is fixed in the fins; the electrothermal tubes penetrate into the fins, and are positioned at the air inlet side of the fin heat exchanger. The electrothermal tubes can be uniformly arranged at intervals. The fin heat exchanger can also comprise a temperature probe which can detect the temperature of the fins. The temperature probe is electrically connected with the electrothermal tubes. The heat exchange copper tube is fixed in the fins through both ends of a tube plate. The fin heat exchanger can effectively guarantee outdoor fins not to frost or relieve the frosting degree, thus quickly entering the defrosting circulation cycle to enhance the heating property in winter.

Description

A kind of finned heat exchanger

Technical field

The utility model relates to a kind of heat exchanger, particularly a kind of finned heat exchanger of air-conditioning.

Background technology

Now the finned heat exchanger of air-conditioning generally is by efficient straight copper tube or efficient inner screw thread copper pipe and aluminium foil fin bloated the forming of rising, but when heating in the winter time, and the outside finned heat exchanger is in evaporator function the refrigeration duty of cold-producing medium is discharged in the middle of the outdoor environment.If finned heat exchanger heat exchange this moment effect is bad or environment temperature is too low, during generally in environment temperature≤3 ℃, finned heat exchanger just has the possibility of frosting, in case the finned heat exchanger frosting will produce adverse influence to the heating operation of Air-Cooled Heat Pump Unit: increased the thermal resistance between air and the air cooling heat exchanger on the one hand; On the other hand, thickening of frost layer increases air flow resistance, and air mass flow reduces, and the heat exchange amount of air cooling heat exchanger reduces.Therefore, when the frost layer reaches certain thickness, must defrost.In unit when defrosting, will stop to the heat supply of need heat target, cause room temperature to descend, and the heat supply COP of unit (refrigeration or heating efficiency) also descends, and defrosting time is controlled in the shortest time often and finishes, and the pressure of refrigeration system, variations in temperature are violent like this.Along with the decline of temperature, when outdoor temperature≤0 ℃, heat capacity descends greatly, can not satisfy the needs of indoor heating in winter.In the heat supply of indoor installation electric heater, will consume a large amount of electric energy in this way, cost increases considerably.And working under low temperature environment heats, and the institute of compressor wasted work rate own also can increase, the too high fault actions of compressor exhaust temperature, and promptly unit is in work under the frequent protection work condition environment.

Summary of the invention

The utility model is by adopting finned heat exchanger to serially add the temperature that electrothermal tube improves finned heat exchanger, thereby guarantees that the outside fin is not in frozen condition under or alleviates the frosting degree, and increasing enters the defrost cycle cycle and improves the performance of winter heating.

Finned heat exchanger of the present utility model comprises fin and wears the heat exchange copper tube that is fixed in the fin that also comprise the electrothermal tube that delays frosting, electrothermal tube is arranged in the fin, and is positioned at the inlet side of finned heat exchanger.

In the technique scheme, electrothermal tube can be evenly distributed at interval.

In the technique scheme, finned heat exchanger can also comprise the temp probe that detects the fin temperature, and temp probe is electrically connected with electrothermal tube.

In the technique scheme, heat exchange copper tube can be fixed in the fin by the tube sheet at two ends.

Improve evaporating temperature by wearing electrothermal tube, can improve the COP of system greatly at finned heat exchanger.Realized unit is converted to the work of normally heating under the environment from frequent protection work condition environment.

Description of drawings

Figure 1A to Fig. 1 C is the utility model finned heat exchanger structural representation (direction of arrow is the air intake direction among the figure), and wherein Figure 1A is that front view, Figure 1B are that side view, Fig. 1 C are vertical view;

Fig. 2 A to Fig. 2 B is the enlarged diagram of electrothermal tube in the utility model finned heat exchanger, and wherein Fig. 2 A is that front view, Fig. 2 B are side view.

Mark the following drawings mark thereon in conjunction with the accompanying drawings:

The 1-tube sheet, 2-electrothermal tube, 3-U type copper elbow, 4-aluminium fin, 5-heat exchange copper tube.

The specific embodiment

Below in conjunction with accompanying drawing, a specific embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model is not subjected to the restriction of the specific embodiment.

Shown in Figure 1A to Fig. 1 C and Fig. 2 A to Fig. 2 B, the utility model finned heat exchanger comprises aluminium fin 4 and wears the heat exchange copper tube 5 that is fixed in the aluminium fin 4, also comprise electrothermal tube 2, can delay frosting, electrothermal tube 2 is arranged in the aluminium fin 4, and be positioned at the inlet side of finned heat exchanger, shown in the direction of arrow among Fig. 1.Electrothermal tube 2 is evenly distributed at interval.Finned heat exchanger also comprises the temp probe (not shown) that detects the fin temperature, and temp probe is electrically connected with electrothermal tube 2, and temp probe passes to electrothermal tube 2 with result of detection, controls its "on" position and realizes defrosting.Heat exchange copper tube 5 is fixed in the aluminium fin 4 by the tube sheet 1 at two ends.Tube sheet 1 outside is a U type copper elbow 3.

Unit is in the winter time the time, detect temperature on the fin by temp probe, (generally getting environment temperature is 3 ℃ when if the fin temperature is lower than setting value, be rationally to set this setting value in the actual motion) according to local humidity, finned heat exchanger make electrothermal tube begin electric work, improve the temperature on the fin, be equivalent to improve the environment temperature of outside, thereby reduce or delay the frosting possibility of finned heat exchanger, produce adverse influence after also just having overcome the finned heat exchanger frosting.From outdoor heat exchanger wind direction circulation theory, generally electrothermal tube can be installed on the outermost of air intake, when the outside exhaust blower is worked like this electrothermal tube heat is sucked finned heat exchanger, effectively improve the electric heater utilization rate.

When environment temperature≤-5 ℃, unit heats work under bad working environments, at this moment the heat that possible electrothermal tube adopts, be not enough to guarantee the finned heat exchanger frost-free, become the frost time but also alleviated, unit enters the cycle of defrosting once more thereby elongated next time, can prolong greatly to enter defrosting cycle once more, and improve evaporimeter heat exchange amount, bring better benefit.Simultaneously in a single day unit enters defrost state, electrothermal tube also be in electric work state, shorten unit like this and enter the automatic defrosting time, thereby improve the heating efficiency of unit.

More than disclosed only be a specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection domain of the present utility model.

Claims

1. a finned heat exchanger comprises fin and wears the heat exchange copper tube that is fixed in the described fin, it is characterized in that, also comprise the electrothermal tube that delays frosting, described electrothermal tube is arranged in the described fin, and is positioned at the inlet side of finned heat exchanger.

2. finned heat exchanger according to claim 1 is characterized in that, described electrothermal tube is evenly distributed at interval.

3. finned heat exchanger according to claim 1 and 2 is characterized in that, also comprises the temp probe that detects the fin temperature, and described temp probe is electrically connected with described electrothermal tube.

4. finned heat exchanger according to claim 1 and 2 is characterized in that, described heat exchange copper tube is fixed in the described fin by the tube sheet at two ends.