CN2886462Y

CN2886462Y - Unevenly defrosting structure for air conditioner

Info

Publication number: CN2886462Y
Application number: CN 200620070536
Authority: CN
Inventors: 丁伟; 陈振乾; 秦建
Original assignee: Xuzhou Wanhe Cooling & Heating Equipment Co Ltd
Current assignee: Xuzhou Wanhe Cooling & Heating Equipment Co Ltd
Priority date: 2006-03-20
Filing date: 2006-03-20
Publication date: 2007-04-04
Anticipated expiration: 2016-03-20

Abstract

The utility model discloses a non-uniform defrost structure for air-conditionings which extends a portionstate for expelling frost layer on the bottom arranged on a coiler of adjusting part on the bottom of a normal finned heat exchanger. A distributing pipe is arranged on the outer capillary of the throttling dispensing system to ensure a thermodynamic uniformity on the condition of reducing system resistance intensively when the system in a defrosting status.

Description

Air-conditioning heterogeneity defrost structure

Technical field

The utility model belongs to air-conditioning technical field.A kind of heterogeneity defrost structure of finned heat exchanger specifically.

Background technology

Air-source heat pump air conditioning system is applied widely at air conditioner industry, mainly is the randomness because of its good heat exchange property and installation site.But present outdoor finned heat exchanger heats in the process in the winter time because of environment temperature is low, and high humidity causes the heat exchanger surface frosting, and the heat exchanger heat exchange efficiency is sharply worsened.In order effectively to improve heat exchange efficiency, air-conditioning producer has adopted cycle defrost technology.But because the heat exchanger structure problem, the melt water that the position defrost of heat exchanger middle and upper part is produced flows to the bottom with the effect of gravity, because of the defrost periods reason cause defrost finish melt water as yet trickling totally just enter next and heat circulation.This phenomenon is particularly evident in the air-source heat pump air conditioning system of last air-out mode, chief reason is upper, middle and lower three position air intake wind speed as shown in Figure 1 variant of heat exchanger, cause heat exchange efficiency inhomogeneous, cause the finned heat exchanger original frosting in surface inhomogeneous.Go round and begin again like this and cause the frosting of heat exchanger bottom progressively to worsen, can't effectively improve heat exchange efficiency, even can occur because of the heat exchange effect badly, cause compressor to return liquid, the phenomenon that causes compressor generation liquid to go out.Simultaneously part arm (mainly concentrating on the heat exchanger bottom) often appears because of effectively defrosting of heat power reason in the cold-producing medium running in the defrosting process; and the defrosting of other arms finishes; cause this moment system high pressure operating pressure higher, organizational security occurs jumping and protect phenomenon.

Summary of the invention

The purpose of this utility model provides a kind of heterogeneity defrost structure of finned heat exchanger, and uniformity and molten the sustainable of white process that can effectively control frosting carry out.

The utility model is achieved by the following technical solution: a kind of air-conditioning heterogeneity defrost structure, comprise finned heat exchanger, throttling distribution portion, and it is characterized in that having increased preferential except that bottom frost layer heat exchanging part in the bottom of heat exchanger; Adopt the throttling distribution structure that increases the distribution resistance and reduce defrosting process resistance in the throttling distribution portion; Described throttling distribution structure by distributing pipe and concentric device the capillary in distributing pipe form, gapped between capillary and the distributing pipe.

Described distributing pipe is big latus rectum copper pipe.

Owing to be applied to preferentially remove bottom frost layer at common finned heat exchanger lower curtate adjustment member coil pipe, can guarantee that in the process of heating the gas that compressor reclaims is overheated gas like this, can effectively reduce coil pipe bottom defrosting simultaneously and worsen phenomenon.Taking to increase the distribution resistance aspect the throttling distribution and reducing the measure of defrosting process resistance, heat cold-producing medium distribution employing capillary (less latus rectum) under the state, refrigeration and defrosting process cold-producing medium distribute gap between the copper pipe (big latus rectum) operation by capillary and big latus rectum, like this to guarantee the uniformity of distribution system, guarantee that the fin surface frosting is even, system's cold-producing medium heat power under the defrosting state is even, realizes effective defrost.

The beneficial effects of the utility model are: distribution system is even, and heat exchanger fin surface frosting is even.System is guaranteeing under the condition of abundant reduction system running resistance under the defrosting state that the cold-producing medium heat power is even.Can effectively control the uniformity of frosting and the sustainability of defrosting process, improve the reliability of system.

9 description of drawings

Be described in further detail the utility model below in conjunction with drawings and Examples.

Fig. 1 is heat exchanger three position air intake wind speed difference schematic diagrames;

Fig. 2 is the utility model schematic diagram;

Fig. 3 is the utility model structural representation.

Among the figure: 1, heat exchanger, 2, preferentially remove bottom frost layer heat exchanging part, 3, capillary, 4, distributing pipe, 5, evaporimeter, 6, cross valve, 7, compressor.

The specific embodiment

As Fig. 3, shown in Figure 2, increased the preferential bottom frost layer heat exchanging part 2 of removing in the bottom of heat exchanger 1, the gas that compressor 7 is reclaimed in the air-conditioning process of heating is overheated gas like this, can reduce coil pipe bottom defrosting simultaneously and worsen phenomenon.Distribute the periphery of capillary 3 to be with big latus rectum in throttling and distribute copper pipe 4, both concentric assemblings leave the gap between the two, and cold-producing medium distributes employing capillary (less latus rectum) under the state of heating; Refrigeration and defrosting process cold-producing medium so just can guarantee the uniformity of distribution system by the gap between capillary 3 and the distributing pipe 4 (big latus rectum) operation, make heat exchanger fin surface frosting even.

Claims

1, a kind of air-conditioning heterogeneity defrost structure comprises finned heat exchanger (1), throttling distribution portion (2), it is characterized in that having increased in the bottom of heat exchanger (1) preferential except that bottom frost layer heat exchanging part (2); Adopt the throttling distribution structure that increases the distribution resistance and reduce defrosting process resistance in the throttling distribution portion; Described throttling distribution structure by distributing pipe (4) and concentric device the capillary (3) in distributing pipe (4) form, gapped between capillary (3) and the distributing pipe (4).

2, air-conditioning heterogeneity defrost structure according to claim 1 is characterized in that distributing pipe (4) is big latus rectum copper pipe.