CN2136970Y

CN2136970Y - Comprehensive heat exchanger

Info

Publication number: CN2136970Y
Application number: CN 92234026
Authority: CN
Inventors: 王堃棋
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-29
Filing date: 1992-09-29
Publication date: 1993-06-23
Anticipated expiration: 2002-09-29

Abstract

The utility model relates to a comprehensive heat exchanger for the freezing system, cold air system and air-conditioning system for automobile. The utility model is characterized in that the inner side of the hollow tubular identity is provided with a low-voltage spiral pipe for flowing the low-voltage liquid cooling medium; the both ends of the pipe extends from the both sides of the identity and are the low-voltage inlets and the low-voltage outlets respectively. The part of the central spiral pipe is a high-voltage flowing channel; the both ends of the identity is respectively provided with a low-voltage air inlet and a low-voltage exhaust port; a low-voltage flowing channel is formed between the air inlet and the exhaust port. The low-voltage air inlet is provided with a silencing bore; under the function of the heat exchange carried out in the identity between the two flowing channels, the refrigerating efficiency is raised and the service life of compressor is lengthened and the noise is decreased.

Description

Comprehensive heat exchanger

The utility model relates to the integrated heat exchanger that the air-conditioning system of a kind of freezing, cold air and automobile is used.

General commonly used freezing, cold air and its structure of automotive air-conditioning system include as shown in Figure 3: compressor 10, condensed device 20, hold major parts such as liquid drier 30 and evaporimeter 60; Wherein compressor 10 is collapsed into liquid with gas coolant and is flow to by pipe arrangement and holds liquid drier 30, enter evaporimeter 60 at last, carry out heat exchange at evaporimeter 60 and produce refrigerating effect, the gaseous coolant of being discharged by evaporimeter 60 evaporation backs flow back in the compressor 10 again, and circulation forms the loop so repeatedly.Because when refrigerant flows out from evaporimeter 60, still have the liquid of not vaporizing fully most probably, in case liquid flows into compressor 10, very easily damage the member of compressor 10, (as valve) and, such closed circuit also produces very big noise, when especially being applied in automotive air-conditioning system, because the vibrations of automobile itself will make the noise situation more serious.

In view of general cooling system has above-mentioned shortcoming, adopted the mode that increases special device to seek to improve now, as shown in Figure 4, installing muffler 70 additional in general cooling system, and hydrops device 80 devices such as grade, the refrigerant that such improvement only can solve noise reluctantly and enter compressor 10 has two problems of liquid, but effect is still undesirable, and because hydrops device 80 volumes are quite big, this kind method is just inapplicable for class such as air conditioning system for automotive vehicles, and freezing efficient still can't improve.

The purpose of this utility model is to provide a kind of refrigerant that has overcome the noise that exists in the existing cooling system and entered compressor still to have the shortcoming of liquid, utilize heat exchange action to help the high pressure refrigerant to liquefy fully, low pressure refrigerant is gasified totally, and prolongs the integrated heat exchanger of compressor life-span and reduction evaporating temperature, raising cold air, freezing efficiency.

Advantage of the present utility model has:

1. the utility model is a multifunctional comprehensive body, has the effect of noise reduction, hydrops, and the effect of heat exchange is more arranged, in the automotive air-conditioning system that volume is little, be applicable to limited space.

2. the utility model utilizes low temperature refrigerant and high temperature refrigerant to produce heat exchange, has reduced the temperature of high pressure refrigerant, has reduced evaporator refrigerant temperature effectively, has improved refrigerating capacity and effect; And the refrigerant that does not condense is fully thoroughly condensed, improved the action effect of expansion valve; Also can make the refrigerant that liquid does not fully gasify that has that is back to compressor by evaporimeter, because of the heat exchanger draw heat is gasified totally.

3. the volumetric expansion that provides of the utility model, bloop and helix tube produce to flow to interfere and three kinds of modes such as hinder, low pressure refrigerant is abated the noise because of frequency shift.

4. the utility model has improved refrigerating effect, has relatively saved fuel oil.

5. simple structure, assembling and easy to maintenance.

The purpose of this utility model is achieved in that a body that is hollow tube-shape, its inside is provided with the high-pressure spiral-coil of a circulation high-pressure liquid refrigerant, these pipe two ends are extended the body both sides and are respectively the high-pressure spray inlet and the high-pressure spray outlet, and the central spiral tube portion is the high pressure stream; The body two ends are respectively equipped with a low-pressure admission mouth and a low pressure exhaust mouth, form the low pressure stream in the middle of it; On the low-pressure admission mouth, be provided with some bloops.Make between two kinds of pipelines and produce heat exchange, rely on the low temperature of low pressure line that the refrigerant in the pressure duct is liquefied and fully cooling fully, the temperature of pressure duct also makes the interior refrigerant of low pressure line be gasified totally simultaneously, thoroughly stops the possibility that liquid enters compressor.

Fig. 1 is applied to the stereogram of automotive air-conditioning system for the utility model.

Fig. 2 is applied to the cooling circuit schematic diagram of automotive air-conditioning system for the utility model.

Fig. 3 is general automotive air-conditioning system cooling circuit schematic diagram.

Fig. 4 is the improved cooling circuit schematic diagram of cooling circuit shown in Figure 3.

Fig. 5 is the performance table of automotive air-conditioning system.

Below in conjunction with accompanying drawing the utility model is further described.

The utility model can be widely used on general family or industrial freezing, the thermantidote, also can be applicable on the automotive air-conditioning system, and be that example illustrates performance of the present utility model only below with air conditioning for automobiles.

As shown in Figure 1 and Figure 2, the utility model in use, whole cooling system loop by compressor 10, condensed device 20, hold liquid drier 30, integrated heat exchanger 40, expansion valve 50, evaporimeter 60 and the main members such as refrigerant pipe 90～95 that connect each assembly are formed, wherein condensed device 20 sides are provided with radiator fans 25, and evaporimeter 60 sides are provided with pressure fan 65 and strengthen cross-ventilated effect.

The whole cooling circuit course of work as shown in Figure 2, at first the low pressure gaseous coolant is entered in the compressor 10 by air inlet 13 air intake valve 11 of flowing through, compressor 10 drives running by engine's motive power, refrigerant is compressed into gases at high pressure after, flow out compressors 10 by drain tap 12, exhaust outlet 14.The high-pressure gaseous refrigerant that forms enters condensed device 20 via the refrigerant pipe 90 condensed device inlet 21 of flowing through, be condensed into liquid refrigerants therein and emit heat, the liquid refrigerants that forms flows out via condensed device outlet 22 again, flow to the inlet 31 that holds liquid drier 30 by refrigerant pipe 91, flow out through exporting 32 again after drying and the filtration.

At this moment, the high-pressure spiral-coil 45 that the liquid refrigerants that disposes is flowed in the integrated heat exchanger 40 by high-pressure spray inlet 46 through refrigerant pipe 92, carry out heat exchange at this, the high pressure refrigerant is liquefied fully and reduce its temperature at this, high-pressure liquid refrigerant after using up enters expansion valve 50 through refrigerant pipe 93 self-expanding valve inlets 51, this moment, expansion valve 50 flowed out the gaseous coolant temperature of evaporator outlet 62 via temperature sensing tube 53 sensings, and the size of control valve is adjusted the speed of action of expansion valve 50 with control, flow out through expansion valve outlet 52 via expansion valve 50 post-decompression refrigerants, flash-pot 61 inflow evaporators 60 that enter the mouth, and suck a large amount of heat energy at this, make refrigerant be gasificated into the low pressure gaseous coolant, reduce cryogenic temperature with this, reach the effect of cold air, the low-pressure liquid refrigerant is flowed through refrigerant pipe 94 in the low pressure stream of low-pressure admission mouth 41 inflow integrated heat exchangers 40 by evaporator outlet 62, carry out heat exchange at this, continue to absorb enough heats and reach sufficient gasification, flow to suction port of compressor 13 from the low pressure exhaust mouth 42 refrigerant pipe 95 of flowing through again, form the loop.

Concrete structure of the present utility model and effect are as follows, integrated heat exchanger 40, by a body that is hollow tube-shape is shell, central interior is established a high-pressure spiral-coil 45, it is external that these high-pressure spiral-coil 45 two ends extend to, two ends are respectively equipped with high-pressure spray inlet 46 and high-pressure spray outlet 47, form spiral helicine high pressure stream therebetween, offer low-pressure admission mouth 41 and low pressure exhaust mouth 42 respectively in the axial both sides of body, form the low pressure stream at the inner wall of these high-pressure spiral-coil 45 outsides and body, wherein low-pressure admission mouth 41 extends on the end of body interior and offers some bloops 43.Because in the high-pressure spiral-coil 45 is the liquid coolant that high temperature, high pressure are housed, and the gaseous coolant of low temperature, low pressure then is housed in the low pressure stream, both rely on also can be for producing best heat exchange effect between the two to reach maximum contact area by the helical form contact.The high pressure refrigerant is reached condense fully and fully heat release, cool effect, effectively reduce evaporator refrigerant temperature, improve freezing efficiency.And make low pressure refrigerant draw enough heats and fully vaporization, reach the purpose of protection compressor 10.And, because low-pressure admission mouth 41 diameters are much smaller than the body internal diameter, when being flowed into by low-pressure admission mouth 41, low-pressure gas have sufficient space to expand, and the interference that bloop of being offered on the low-pressure admission mouth 41 43 and high-pressure spiral-coil 45 are produced hinders effect, helps to change frequency and reduces the noise that the low pressure gaseous coolant is produced.

Fig. 5 is the performance table of automotive air-conditioning system, its impose a condition into, engine speed is under the 1500RPM, various natural environments, temperature, humidity are to the influence that pressure produced of high pressure refrigerant, low pressure refrigerant.Wherein high pressure gauge pressure representative enters the sincere refrigerant pressure of high pressure liquid before the expansion valve 50, and the low-pressure meter pressure representative is through the refrigerant pressure of decompression, rule of thumb rule low-pressure meter force value approximates the value of evaporator refrigerant temperature (F), promptly in usual relative humidity 60～65%, temperature is under 90 °～100 states, evaporating temperature is about about 28 °～35 °F, as seen the effect of its cold air is unsatisfactory, in fact because present running down of environment, temperature constantly rises because of greenhouse effects, these can be by heat test by early stage 35 ℃, the 600KCal width of cloth is penetrated the standard of heat, rise to 43 ℃ now, the 860 card width of cloth are penetrated the requirement of heat and are obviously found out, traditional cooling circuit can't be difficult to produce effect preferably mostly, after adopting the utility model, can effectively reduce the temperature of high pressure refrigerant, the relative evaporating temperature that also can reduce refrigerant, evaporating temperature can drop to 15 °～21 °F under the same conditions, thereby has improved refrigerating effect effectively.

Claims

1, a kind of integrated heat exchanger, it is characterized in that: a body that is hollow tube-shape, its inside is provided with the high-pressure spiral-coil of a circulation high-pressure liquid refrigerant, and these pipe two ends are extended the body both sides and are respectively the high-pressure spray inlet and the high-pressure spray outlet, and the central spiral tube portion is the high pressure stream; The body two ends are respectively equipped with a low-pressure admission mouth and a low pressure exhaust mouth, form the low pressure stream in the middle of it; On the low-pressure admission mouth, be provided with some bloops.