CN107101420A - A kind of heat-exchanger rig suitable for low pressure refrigerant - Google Patents
A kind of heat-exchanger rig suitable for low pressure refrigerant Download PDFInfo
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- CN107101420A CN107101420A CN201610095118.6A CN201610095118A CN107101420A CN 107101420 A CN107101420 A CN 107101420A CN 201610095118 A CN201610095118 A CN 201610095118A CN 107101420 A CN107101420 A CN 107101420A
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- Prior art keywords
- heat exchange
- exchange unit
- refrigerant
- water
- heat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/09—Improving heat transfers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/24—Low amount of refrigerant in the system
Abstract
The invention discloses a kind of heat-exchanger rig suitable for low pressure refrigerant, including the first heat exchange unit and the second heat exchange unit, the refrigerant outlet of first heat exchange unit is connected with the refrigerant inlet of second heat exchange unit by throttling arrangement, condensation tube bank is disposed with first heat exchange unit, cylinder axial direction is provided with refrigerant distributor in the cylinder of second heat exchange unit, the top of the refrigerant distributor is disposed with condensation tube bank, and lower disposed has falling film evaporation tube bank.A kind of heat-exchanger rig suitable for low pressure refrigerant that the present invention is provided, the defect of refrigerant distributor in traditional falling film evaporator is overcome, the system using low pressure refrigerant can be applied to, it has simple in construction, heat transfer efficiency is high, the advantages of refrigerant charge is few.
Description
Technical field
The present invention relates to refrigeration technology field, more particularly to a kind of heat exchange suitable for low pressure refrigerant
Device.
Background technology
Falling film evaporator is higher with its heat transfer efficiency, and the features such as refrigerant charge is less exists
Applied on increasing refrigeration air-conditioning unit.Falling film evaporator is generally using shown in Fig. 1
Structure, it includes evaporator muffler 52, feed tube 51, refrigerant distributor 50 and evaporation
Tube bank 53.Gas-liquid two-phase cold-producing medium enters in evaporator by feed tube 51, is distributed by refrigerant
Refrigerant liquid is dropped in steam-generating bank 53 after device 50, after heat exchange, refrigerant gas after evaporation
Body is discharged into compressor through evaporator muffler 52.Refrigerant distributor 50 in Fig. 1 is drop
Critical component in film evaporator, to realize that refrigerant is evenly distributed in steam-generating bank, typically will
Asking the interior outside of refrigerant distributor, it is necessary to have enough pressure differences.Such as, in the mesohigh system of use
In the refrigeration unit of cryogen (such as R134a), the inside and outside side pressure difference of refrigerant distributor is generally needed
Reach 150~300kPa.
With the development of air-conditioning technical, low pressure refrigerant R1233zd (E) is excellent because of its environmental protection, efficient etc.
Point, has been subjected to refrigerating and air conditioning industry and has more and more paid close attention to, and table 1 is a typical refrigeration work
Under condition (5 DEG C of evaporating temperature, 36.7 DEG C of condensation temperature), R1233zd (E) and R134a evaporating pressures,
The comparison of condensing pressure, it can be seen that the difference of R1233zd (E) evaporating pressures and condensing pressure only has
The 23.1% of R134a.To low pressure refrigerants such as R1233zd (E), the system in traditional falling film evaporator
Refrigerant distributor obviously can not meet requirement.
The exemplary refrigerant operating mode of table 1
Accordingly, it would be desirable to which one kind can more effectively evenly distribute refrigerant to heat exchanger tube, it is adaptable to low
The heat-exchanger rig of compression refrigerant environment.
The content of the invention
It is an object of the invention to provide a kind of heat-exchanger rig suitable for low pressure refrigerant, biography is overcome
The defect of refrigerant distributor, solves the evaporation of low pressure refrigerant well in system falling film evaporator
The problem of device refrigerant is distributed.
On the one hand, the invention provides a kind of heat-exchanger rig suitable for low pressure refrigerant, including
First heat exchange unit and the second heat exchange unit, the refrigerant outlet of first heat exchange unit and described
The refrigerant inlet of second heat exchange unit is connected by throttling arrangement, cloth in first heat exchange unit
It is equipped with condensation tube bank, the cylinder of second heat exchange unit and cylinder axial direction is provided with refrigeration
Agent distributor, the top of the refrigerant distributor is disposed with condensation tube bank, and lower disposed has falling liquid film
Steam-generating bank.
In one embodiment, described heat-exchanger rig, first heat exchange unit includes first
Heat exchange unit refrigerant inlet pipe and the first heat exchange unit refrigerant outlet pipe；Second heat exchange is single
The second heat exchange unit refrigerant inlet pipe and the second heat exchange unit refrigerant outlet pipe are provided with member.
In one embodiment, described heat-exchanger rig, the condenser pipe of first heat exchange unit
Impingement baffle is provided between beam and the first heat exchange unit refrigerant inlet pipe；Second heat exchange
Impingement baffle is provided between the condensation tube bank of unit and the second heat exchange unit refrigerant inlet pipe.
In one embodiment, in described heat-exchanger rig, the cylinder of second heat exchange unit
Return-air liquid barrier is provided with, the cylinder is separated into cloth tube chamber and return-air chamber along cylinder axial direction,
The second heat exchange unit refrigerant outlet pipe and the return-air chamber are communicated, second heat exchange unit
Refrigerant inlet pipe is communicated with the cloth tube chamber.
In one embodiment, described heat-exchanger rig, first heat exchange unit also includes setting
Put the tube sheet, preceding water tank and rear water box at the cylinder two ends of first heat exchange unit, the preceding water
Water inlet pipe and cooling water outlet pipe are provided with case, the preceding water tank is internally provided with pass partition,
The water inlet pipe and the cooling water outlet pipe are separated.
In one embodiment, described heat-exchanger rig, second heat exchange unit is also included and set
Put and set on tube sheet, preceding water tank and the rear water box at the second heat exchange unit cylinder two ends, the preceding water tank
It is equipped with water inlet pipe, chilled water water inlet pipe and chilled water outlet pipe, the water inlet pipe and the chilled water
The preceding water tank baffle for preventing cooling water and chilled water to be mutually mixed is provided between outlet pipe, it is described cold
Freeze to be provided with pass partition, the rear water box between water water inlet pipe and the chilled water outlet pipe and set
It is equipped with the rear water box dividing plate for preventing cooling water and chilled water to be mutually mixed.
In one embodiment, described heat-exchanger rig, the water inlet pipe of second heat exchange unit
It is connected with the water inlet pipe of first heat exchange unit by pipeline, after second heat exchange unit
The CWR communicated with the rear water box of first heat exchange unit is also set up on water tank.
On the other hand, the invention provides the method using above-mentioned heat-exchanger rig, methods described bag
Include：
Refrigerant gas is after exhaust outlet of compressor is discharged, through the first heat exchange unit refrigerant inlet
Enter inside first heat exchange unit；
Refrigerant is condensed into highly pressurised liquid, from institute after first heat exchange unit condensation tube bank
State the first heat exchange unit refrigerant outlet and exit into the connecting pipe；
High pressure liquid refrigerant is changed into middle pressure two phase refrigerant after the throttling arrangement；
Middle pressure two phase refrigerant enters described second by the second heat exchange unit refrigerant inlet
Inside heat exchange unit；
Middle pressure two phase refrigerant is condensed by the condensation tube bank of the second heat exchange unit internal upper part
Afterwards, it is changed into middle pressure saturated liquid；
Middle pressure saturated liquid is uniform low on the refrigerant distributor by condensation tube bank, passes through
The refrigerant distributor throttles again is changed into low pressure two phase refrigerant；
Low pressure two phase refrigerant uniformly drops onto the second heat exchange unit bottom after reducing pressure by regulating flow
After being evaporated in falling liquid film tube bank, it is changed into low pressure refrigerant gas, low pressure refrigerant gas is through described
Muffler on second heat exchange unit returns to compressor air suction mouthful.
Any combination of the present invention including any of the above-described or multiple embodiments.
Invention provides a kind of Double-bundle heat-exchanger rig suitable for low pressure refrigerant, and it has structure
Simply, heat transfer efficiency is high, the advantages of refrigerant charge is few.
It should be appreciated that foregoing description substantially and follow-up description in detail are that exemplary illustration is conciliate
Release, the limitation to claimed content of the invention should not be used as.
Brief description of the drawings
With reference to the accompanying drawing enclosed, inventing more purposes, function and advantage will be by present invention implementation
The described below of mode is illustrated, wherein：
Fig. 1 shows traditional falling film evaporator structural representation；
Fig. 2 shows a kind of heat-exchanger rig structural representation；
Fig. 3 shows the flow water-flow circuit structural representation of embodiment one or two；
Fig. 4 shows the kind of refrigeration cycle logP-h figures of the heat-exchanger rig of embodiment one；
Fig. 5 shows two liang of flow water-flow circuit structural representations of embodiment；
Fig. 6 shows the kind of refrigeration cycle logP-h figures of the heat-exchanger rig of embodiment two.
Embodiment
By reference to one exemplary embodiment, the purpose and function of invention and for realizing these purposes
It will be illustrated with the method for function.However, invention be not limited to it is as disclosed below exemplary
Embodiment；It can be realized by multi-form.The essence of specification is only to aid in
The detail of various equivalent modifications Integrated Understanding invention.
Hereinafter, the embodiment of invention will be described with reference to the drawings.In the accompanying drawings, identical accompanying drawing
Mark represents same or similar part, or same or like step.
Embodiments of the present invention are illustrated below in conjunction with the accompanying drawings.
A kind of heat-exchanger rig structural representation such as Fig. 2 suitable for low pressure refrigerant that the present invention is provided
It is shown, including the first heat exchange unit 16, throttling arrangement 6, the heat exchange unit of connecting pipe 17 and second
18.The first wherein described heat exchange unit 16 includes and is provided with the first heat exchange on cylinder 1, cylinder 1
The heat exchange unit refrigerant outlet 3 of unit refrigerant inlet 2 and first.Cylinder 1 is internally provided with erosion control
Plate 4 and condensation tube bank 5.Second heat exchange unit 18 includes and is provided with second on cylinder 7, cylinder 7
The heat exchange unit refrigerant outlet 9 of heat exchange unit refrigerant inlet 8 and second.Cylinder 7 is internally provided with
Impingement baffle 11, liquid barrier 12 and refrigerant distributor 14.Axial direction side of the liquid barrier 12 along cylinder 7
Return-air chamber 15 and cloth tube chamber 19 are separated into by inner barrel, return-air chamber 15 and cloth tube chamber 19 pass through
The opening 20 for being arranged on the bottom of liquid barrier 12 is connected, the second heat exchange unit refrigerant inlet 8 with
Cloth tube chamber 19 is communicated, and the second heat exchange unit refrigerant outlet 9 is communicated with return-air chamber 15.Refrigerant
Distributor 14 is arranged in cloth tube chamber 19, and the axial direction by cloth tube chamber along cylinder 7 is separated into
Two parts up and down, refrigerant distributor is equipped with condensation tube bank 10 in top distribution；Bottom distribution is equipped with
Falling film evaporation tube bank 13.Equipped with throttling dress between first heat exchange unit 16 and the second heat exchange unit 18
6 are put, and is connected by pipeline 17.
Embodiment one：
Fig. 3 is two flow water-flow circuit structural representations of embodiment one.As shown in figure 3, the
One heat exchange unit 16 also includes and is arranged on the tube sheet 21 at the two ends of the first heat exchange unit cylinder 1, preceding water tank
22 and rear water box 23.Water inlet pipe 24 and cooling water outlet pipe 25 are provided with preceding water tank 22.Preceding water
Case is internally provided with pass partition 34, and water inlet pipe 24 and cooling water outlet pipe 25 are separated.
As shown in figure 3, the second heat exchange unit 18, which is also included, is arranged on 7 liang of the second heat exchange unit cylinder
Tube sheet 30, preceding water tank 31 and the rear water box 32 at end.Water inlet pipe 26 is provided with preceding water tank 31, it is cold
Freeze water water inlet pipe 27 and chilled water outlet pipe 28.The water inlet of the heat exchange unit 16 of water inlet pipe 26 and first
Pipe 24 is connected by pipeline 38, and is communicated with cooling water inlet pipe 29.Water inlet pipe 26 and cold
Dividing plate 35 is provided between jelly water outlet pipe 28, to prevent cooling water and chilled water to be mutually mixed.It is cold
Freeze between water water inlet pipe 27 and chilled water outlet pipe 28 and be provided with pass partition 36.In rear water box 32
Dividing plate 37 is provided with, is acted on identical with dividing plate 35.Cooling water backwater is additionally provided with rear water box 32
Pipe 33, and communicated with the rear water box 23 of the first heat exchange unit 16.
During work, cooling water is two-way through 38 points of pipeline by cooling water inlet pipe 29, and the first via is cold
But water condenses the first-class of tube bank 5 through the first heat exchange unit water inlet pipe 24 into the first heat exchange unit
In journey heat exchanger tube, enter the first heat exchange unit rear water box 23 after forced flow heat exchange in pipe；Second
Road cooling water restrains 10 through the second heat exchange unit water inlet pipe 26 into the condensation of the second heat exchange unit,
Enter in pipe after forced flow heat exchange in the second heat exchange unit rear water box 32, it is then single through the second heat exchange
First return pipe 33 enters in the first heat exchange unit rear water box 23, is changed with first via cooling water first
After being mixed in hot cell rear water box 23, the second procedure for condensing tube bank 5 into the first heat exchange unit is changed
In heat pipe, enter in pipe after forced flow heat exchange in the preceding water tank 22 of the first heat exchange unit 16,
Then discharged by cooling water outlet pipe 34.Chilled water enters second by chilled water water inlet pipe 27 and exchanged heat
Before unit in water tank 31, in the first pass heat exchanger tube that 13 are restrained subsequently into falling film evaporation,
Enter in pipe after forced flow heat exchange in the second heat exchange unit rear water box 32, subsequently into falling film evaporation
In the second procedure heat exchanger tube of tube bank 13, enter water tank before the second heat exchange unit after forced flow heat exchange
31, and chilled water outlet pipe 28 discharges.
As shown in Figure 2, Figure 3 and Figure 4, the first heat exchange unit 16 is condenser, refrigeration unit work
When making, high temperature and high pressure gaseous refrigerant is after exhaust outlet of compressor is discharged, through the first heat exchange unit system
The impingement baffle 4 that cryogen entrance 2 is entered in the inside of the first heat exchange unit cylinder 1, cylinder 1 can
To prevent gas to the directly impact of condensation tube bank 5.Cold-producing medium stream it is condensed tube bank 5 and with pipe
After cooling water is exchanged heat, highly pressurised liquid is condensed into, from refrigerant the first heat exchange unit refrigerant
Outlet 3 is flowed out, into connecting pipe 17.High pressure liquid refrigerant by throttling arrangement 6 throttling after,
Refrigerant pressure differential is DP1=Pc-P1 before and after being changed into middle pressure two phase refrigerant, throttling arrangement.Middle pressure two
Phase refrigerant enters the second heat exchange unit cylinder 7 by the second heat exchange unit refrigerant inlet 8
Impingement baffle 11 in inside, the second heat exchange unit cylinder 7 can prevent middle pressure two phase refrigerant to cold
The impact of solidifying tube bank 10.Certain cavity is provided between condensation tube bank 10 and refrigerant inlet 8,
Refrigerant gas is conducive to uniformly to be diffused into condensation tube bank 10.Middle pressure two-phase refrigerant flow is condensed
After tube bank 10 is condensed, it is changed into middle pressure saturated liquid, and it is uniform low to refrigerant distributor 14
On.The enthalpy difference that cold-producing medium stream crosses condensation tube bank 10 is DH=h1 '-h1, and enthalpy difference DH is using cold
The increased cooling system amount of the solidifying institute of tube bank 10., middle pressure saturation refrigerant is by refrigerant distributor 14
Reducing pressure by regulating flow, is changed into low pressure two phase refrigerant again, uniformly drops onto the bottom of the second heat exchange unit 18
Falling liquid film tube bank 13 on be evaporated, be changed into low-temp low-pressure gaseous refrigerant, entered by opening 20
Return-air chamber 15, then returns to compressor air suction mouthful through the second heat exchange unit muffler 9.Liquid barrier 12
Refrigerant liquid can be prevented to be drawn into the second heat exchange unit muffler 9 with gas.Refrigerant distributor
Front and rear pressure difference is DP2=P1-Pe.
Embodiment two：
Fig. 5 is the two flow water-flow circuit structural representations for applying example two.As shown in figure 5, first
Heat exchange unit 16 also includes the tube sheet 21 for being arranged on the axial two ends of the first heat exchange unit cylinder 1, and preceding
Water tank 22 and rear water box 23.Water inlet pipe 24 and cooling water outlet pipe 25 are provided with preceding water tank 22.
Preceding water tank is internally provided with pass partition 34, and water inlet pipe 24 and cooling water outlet pipe 25 are separated
Come.
As shown in figure 5, the second heat exchange unit 18, which is also included, is arranged on the axle of the second heat exchange unit cylinder 7
To the tube sheet 30 at two ends, and preceding water tank 31 and rear water box 32.Two points are provided with preceding water tank 31
Water inlet pipe 39 and chilled water outlet pipe 28.Two points of water inlet pipes 39 are connected by pipeline 38, and
Communicated with chilled water water inlet manifold 40.Set between one point of water inlet pipe 39 and chilled water outlet pipe 28
Dividing plate 35 is equipped with, to prevent cooling water and chilled water to be mutually mixed.Another point of water inlet pipe 39 and freezing
Pass partition 36 is provided between water outlet pipe 28.
During work, chilled water, through pipeline 38, is divided into two-way by chilled water water inlet pipe 40, and the first via is cold
Freeze water through second heat exchange unit point water inlet pipe 39, tube bank 10 is condensed into the second heat exchange unit
In heat exchanger tube, enter the second heat exchange unit rear water box 32 after forced flow heat exchange in pipe；Second tunnel
Chilled water is through another second heat exchange unit point water inlet pipe 39, into the second heat exchange unit falling liquid film tube bank 13
First pass heat exchanger tube in, in pipe forced flow heat exchange after enter the second heat exchange unit rear water box
In 32, after being mixed with first via chilled water in the second heat exchange unit rear water box 32, changed into second
In the second procedure heat exchanger tube of hot cell falling liquid film tube bank 13, enter the after forced flow heat exchange in pipe
In the preceding water tank 31 of two heat exchange units 18, then discharged by chilled water outlet pipe 28.Cooling water by
Cooling water inlet pipe 24 enters before the first heat exchange unit in water tank 22, single subsequently into the first heat exchange
In the first pass heat exchanger tube of the condensation tube bank 5 of member 16, enter the after forced flow heat exchange in pipe
In one heat exchange unit rear water box 23, subsequently into the of the condensation tube bank 5 of the first heat exchange unit 16
In two flow heat exchanger tubes, enter water tank 22 before the first heat exchange unit after forced flow heat exchange, and through cold
But water outlet pipe 25 is discharged.
As shown in Fig. 2, Fig. 5 and Fig. 6, the first heat exchange unit 16 is condenser, refrigeration unit work
When making, high temperature and high pressure gaseous refrigerant is after exhaust outlet of compressor is discharged, through the first heat exchange unit system
The impingement baffle 4 that cryogen entrance 2 is entered in the inside of the first heat exchange unit cylinder 1, cylinder 1 can
To prevent gas to the directly impact of condensation tube bank 5.Cold-producing medium stream it is condensed tube bank 5 and with pipe
After cooling water is exchanged heat, highly pressurised liquid is condensed into, from refrigerant the first heat exchange unit refrigerant
Outlet 3 is flowed out, into connecting pipe 17.High pressure liquid refrigerant by throttling arrangement 6 throttling after,
Refrigerant pressure differential is DP1_2=Pc-P1_2 before and after being changed into middle pressure two phase refrigerant, throttling arrangement.In
Pressure two phase refrigerant enters the second heat exchange unit cylinder 7 by the second heat exchange unit refrigerant inlet 8
Inside, the impingement baffle 11 in the second heat exchange unit cylinder 7 can prevent middle pressure two phase refrigerant pair
The impact of condensation tube bank 10.Middle pressure two phase refrigerant flows through the condensation on the top of the second heat exchange unit 18
After tube bank 10 is condensed, it is changed into middle pressure saturated liquid, cold-producing medium stream crosses the enthalpy of condensation tube bank 10
Difference is DH_2=h1 '-h1_2.Middle pressure saturated liquid is uniform low to refrigerant by condensation tube bank 10
On distributor 14, throttled again by refrigerant distributor and be changed into low pressure two phase refrigerant, refrigerant
Pressure difference before and after distributor is DP2_2=P1_2-Pe.Flow through the low pressure two after refrigerant distributor 14
Phase refrigerant is uniformly dropped onto to be evaporated in the falling liquid film tube bank 13 of the first heat exchange unit bottom, is become
For low-temp low-pressure gaseous refrigerant, return-air chamber is entered by opening 20, then returned through the second heat exchange unit
Tracheae 9 returns to compressor air suction mouthful.Liquid barrier 12 can prevent refrigerant liquid to be drawn into gas
Second heat exchange unit muffler 9.
Embodiment two is relatively easy compared to the water lines of embodiment one, cold in the second heat exchange unit 18
Flowing is chilled water in solidifying tube bank 10, and temperature is lower, thus refrigerant pressure differential before and after throttling arrangement
It is bigger for DP1_2, be conducive to system fading margin.Meanwhile, cold-producing medium stream crosses the enthalpy difference of condensation tube bank 10
DH_2 is bigger, so as to increase cooling system amount.
Explanation and practice with reference to the invention disclosed here, the other embodiment of invention is for this area
Technical staff will be readily apparent and understand.Illustrate and embodiment be to be considered only as it is exemplary,
The true scope and purport of invention are defined in the claims.
Claims (8)
1. a kind of heat-exchanger rig suitable for low pressure refrigerant, including the first heat exchange unit and second are changed
Hot cell, it is characterised in that the refrigerant outlet of first heat exchange unit and second heat exchange
The refrigerant inlet of unit is connected by throttling arrangement, and condensation is disposed with first heat exchange unit
Cylinder axial direction is provided with refrigerant distributor in tube bank, the cylinder of second heat exchange unit,
The top of the refrigerant distributor is disposed with condensation tube bank, and lower disposed has falling film evaporation tube bank.
2. heat-exchanger rig according to claim 1, it is characterised in that first heat exchange is single
Member includes the first heat exchange unit refrigerant inlet pipe and the first heat exchange unit refrigerant outlet pipe；It is described
The second heat exchange unit refrigerant inlet pipe and the second heat exchange unit refrigeration are provided with second heat exchange unit
Agent outlet.
3. heat-exchanger rig according to claim 2, it is characterised in that first heat exchange is single
Impingement baffle is provided between the condensation tube bank of member and the first heat exchange unit refrigerant inlet pipe；Institute
State the second heat exchange unit condensation tube bank the second heat exchange unit refrigerant inlet pipe between be provided with it is anti-
Punching.
4. heat-exchanger rig according to claim 2, it is characterised in that second heat exchange is single
Return-air liquid barrier is provided with the cylinder of member, the cylinder is separated into stringing along cylinder axial direction
Chamber and return-air chamber, the second heat exchange unit refrigerant outlet pipe and the return-air chamber are communicated, described
Second heat exchange unit refrigerant inlet pipe is communicated with the cloth tube chamber.
5. heat-exchanger rig according to claim 1, it is characterised in that first heat exchange is single
Member also includes tube sheet, preceding water tank and the rear water box for being arranged on the cylinder two ends of first heat exchange unit,
It is provided with water inlet pipe and cooling water outlet pipe on the preceding water tank, the preceding water tank is internally provided with point
Journey dividing plate, the water inlet pipe and the cooling water outlet pipe are separated.
6. heat-exchanger rig according to claim 1, it is characterised in that second heat exchange is single
Member is described also comprising tube sheet, preceding water tank and the rear water box for being arranged on the second heat exchange unit cylinder two ends
Be provided with water inlet pipe, chilled water water inlet pipe and chilled water outlet pipe on preceding water tank, the water inlet pipe and
Be provided between the chilled water outlet pipe the preceding water tank that prevents cooling water and chilled water to be mutually mixed every
Plate, pass partition is provided between the chilled water water inlet pipe and the chilled water outlet pipe, described
The rear water box dividing plate for preventing cooling water and chilled water to be mutually mixed is provided with rear water box.
7. the heat-exchanger rig according to claim 5 and 6, it is characterised in that described second changes
The water inlet pipe of hot cell is connected with the water inlet pipe of first heat exchange unit by pipeline, and described
The cooling communicated with the rear water box of first heat exchange unit is also set up on the rear water box of two heat exchange units
Water return pipe.
8. the method that usage right requires any one of 1-7 heat-exchanger rig, it is characterised in that the side
Method includes：
Refrigerant gas is after exhaust outlet of compressor is discharged, through the first heat exchange unit refrigerant inlet
Enter inside first heat exchange unit；
Refrigerant is condensed into highly pressurised liquid, from institute after first heat exchange unit condensation tube bank
State the first heat exchange unit refrigerant outlet and exit into the connecting pipe；
High pressure liquid refrigerant is changed into middle pressure two phase refrigerant after the throttling arrangement；
Middle pressure two phase refrigerant enters described second by the second heat exchange unit refrigerant inlet
Inside heat exchange unit；
Middle pressure two phase refrigerant is condensed by the condensation tube bank of the second heat exchange unit internal upper part
Afterwards, it is changed into middle pressure saturated liquid；
Middle pressure saturated liquid is equably dropped onto on the refrigerant distributor by condensation tube bank, is passed through
The refrigerant distributor throttles again is changed into low pressure two phase refrigerant；
Low pressure two phase refrigerant equably drops onto the second heat exchange unit bottom after reducing pressure by regulating flow
After being evaporated in falling liquid film tube bank, it is changed into low pressure refrigerant gas, low pressure refrigerant gas is through described
Muffler on second heat exchange unit returns to compressor air suction mouthful.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095118.6A CN107101420B (en) | 2016-02-19 | 2016-02-19 | Heat exchange device suitable for low-pressure refrigerant |
| US15/436,164 US10295234B2 (en) | 2016-02-19 | 2017-02-17 | Heat exchange device suitable for low pressure refrigerant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095118.6A CN107101420B (en) | 2016-02-19 | 2016-02-19 | Heat exchange device suitable for low-pressure refrigerant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107101420A true CN107101420A (en) | 2017-08-29 |
| CN107101420B CN107101420B (en) | 2023-04-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610095118.6A Active CN107101420B (en) | 2016-02-19 | 2016-02-19 | Heat exchange device suitable for low-pressure refrigerant |
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| Country | Link |
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| CN (1) | CN107101420B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115427743A (en) * | 2020-04-03 | 2022-12-02 | 三菱重工制冷空调系统株式会社 | Evaporator and evaporator assembly |
| CN115427743B (en) * | 2020-04-03 | 2024-05-10 | 三菱重工制冷空调系统株式会社 | Evaporator |
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| US20150007604A1 (en) * | 2008-01-02 | 2015-01-08 | Johnson Controls Technology Company | Heat exchanger |
| WO2009089694A1 (en) * | 2008-01-18 | 2009-07-23 | Yang Xu | A falling-film evaporation-cooling absorption refrigeration unit |
| US20130277018A1 (en) * | 2012-04-23 | 2013-10-24 | Aaf-Mcquay Inc. | Heat exchanger |
| CN205641700U (en) * | 2016-02-19 | 2016-10-12 | 约克（无锡）空调冷冻设备有限公司 | Heat transfer device suitable for pressure refrigerant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115427743A (en) * | 2020-04-03 | 2022-12-02 | 三菱重工制冷空调系统株式会社 | Evaporator and evaporator assembly |
| CN115427743B (en) * | 2020-04-03 | 2024-05-10 | 三菱重工制冷空调系统株式会社 | Evaporator |
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| CN107101420B (en) | 2023-04-07 |
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