CN204494920U - A kind of shell-tube type multifunctional heat exchanger - Google Patents

A kind of shell-tube type multifunctional heat exchanger Download PDF

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Publication number
CN204494920U
CN204494920U CN201520169563.3U CN201520169563U CN204494920U CN 204494920 U CN204494920 U CN 204494920U CN 201520169563 U CN201520169563 U CN 201520169563U CN 204494920 U CN204494920 U CN 204494920U
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tube
shell
heat exchanger
refrigerant
group
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王铁军
吕继祥
陈凌云
赵绍博
王俊
赵丽
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China Yangzi Group Chuzhou Yangzi Air Conditioner Co Ltd
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China Yangzi Group Chuzhou Yangzi Air Conditioner Co Ltd
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Abstract

The utility model discloses a kind of shell-tube type multifunctional heat exchanger, it is characterized in that being welded with tube sheet respectively at the two ends of the horizontal shell and tube in level, head plate is fastened on outside tube sheet; In horizontal shell and tube, the bottom being positioned at horizontal shell and tube is liquid storage district, the middle part being positioned at horizontal shell and tube arranges heat exchange tube bundle, and the top being positioned at horizontal shell and tube is provided with the homogenizing plate of through hole, and first refrigerant that circulates in tube side forms the evaporation side in vapor compression refrigeration loop; Circulate the second refrigerant in shell side, and the second refrigerant is cooled or condensation in shell side, and the insufficient section of the cold of the natural cooling source absorbed for the air-cooled heat exchange of supplementary employing.The utility model is applicable to two low-temperature receiver refrigerated air-conditioning system such as heat pipe/steam compressed composite refrigeration system, air-cooled/vapor compression refrigeration composite refrigeration system, have the function of condenser/evaporator or dry evaporator and reservoir concurrently, there is the feature of compact conformation, withstand voltage and good airproof performance.

Description

A kind of shell-tube type multifunctional heat exchanger
Technical field
The utility model relates to refrigeration and air-conditioning technical field, is specifically related to carry out the shell pipe type condensation evaporator of two low-temperature receiver refrigerated air-conditioning system such as the heat pipe of air conditioner refrigerating/steam compressed combined refrigeration system, air-cooled/steam compressed combined refrigeration system etc. or shell-tube dry-type evaporator and reservoir by maximum using natural cooling source.
Background technology
The sensible heat load of machine room, base station is than large; continuous cooling is needed to run throughout the year; in the season of indoor design temperature higher than outside temperature; especially at low temperature season or cold district; conventional data center module and the air-conditioning system of communication base station still need to continue to run vapor compression type refrigerating system; refrigeration system inefficiency and easily fault such as generation low-voltage variation and insufficient lubrication etc.; utilize indoor/outdoor temperature-difference low cost transfer heat or provide cold for indoor, namely utilize natural cooling source greatly can reduce energy consumption and the operating cost of air-conditioning system.
Natural cooling source is utilized to provide in the technology of air-conditioning cold flow for machine room, the most reliable and have wide application prospects should belong to two cold source refrigerating system such as heat pipe/steam compressed composite refrigeration system and air-cooled/vapor compression refrigeration etc., such as correlation technique disclosed in ZL201210037082.8, it is characterized in that: under outdoor is high temperature or middle temperature environment, run Vapor Compression Refrigeration Cycle, under outdoor is middle low temperature or low temperature environment, runs air-cooled circulation.Composite refrigeration system is made up of Vapor Compression Refrigeration Cycle and air-cooled circulation compound, needs configuration condenser/evaporator or dry evaporator and reservoir.Plate type heat exchanger is adopted to have as condenser/evaporator the advantage that heat exchange efficiency is high, heat exchanger volume is little, but the setting height(from bottom) of plate type heat exchanger is larger, the outlet of air cooling heat exchanger and the entrance of plate type heat exchanger must keep certain difference in height, cause overall design height inevitable excessive.The thermic load of Large-scale Data Rooms is large, refrigerant circulation is large, air conditioner load frequent fluctuation, usually the reservoir adopting larger capacity is needed to improve thermal balance ability, cause the volume of reservoir larger, how complete machine space structure design is optimized, how to keep refrigerant in reservoir have suitable degree of supercooling etc. all become combined type refrigerant set structure optimize major issue.In the technical scheme disclosed in ZL201210037082.8, a key character is the recombination region simultaneously worked at heat pipe and vapor compression refrigeration, second refrigerant is first through air-cooled heat release, and then enter condenser/evaporator heat release and reach setting thermal parameter, therefore the second refrigerant enters the state of condenser/evaporator along with outdoor environment temperature and the change of indoor thermic load, it pressure-enthalpy chart is an isobar, outdoor environment temperature is lower and indoor thermic load is less, its state is the closer to saturated liquid line, because the state of the second cooled refrigerant entering condenser/evaporator is change, for the design of heat exchanger is with new requirement.
Utility model content
The utility model is the deficiency for avoiding above-mentioned prior art to exist, a kind of shell-tube type multifunctional heat exchanger having condenser/evaporator and reservoir concurrently provided, reservoir and shell pipe type condensation evaporator are united two into one, for make full use of natural cooling source and the energy-conservation composite refrigeration system by target is applied.
The utility model is that technical solution problem adopts following technical scheme:
The design feature of the utility model shell-tube type multifunctional heat exchanger is:
Described heat exchanger is welded with tube sheet respectively at the two ends of the horizontal shell and tube in level, and head plate adopts bolted in the outside of described tube sheet; In described horizontal shell and tube, the bottom being positioned at horizontal shell and tube is liquid storage district, and the middle part being positioned at horizontal shell and tube arranges heat exchange tube bundle, and the top being positioned at horizontal shell and tube is provided with the homogenizing plate of through hole, and the heat exchanger tube expanded joint in described heat exchange tube bundle is on the tube sheet of two ends;
The first refrigerant import that setting is connected with heat exchange tube bundle on described end socket and the first refrigerant exit form tube side, and first refrigerant that circulates in described tube side forms the evaporation side in vapor compression refrigeration loop;
Second refrigerant import is set at the top of described horizontal shell and tube, second refrigerant exit is set in the bottom of described horizontal shell and tube and forms shell side, circulate the second refrigerant in described shell side, under different external environment conditions, described second refrigerant or enter shell side with the form of overheated gas, and cooled in shell side or condensation; Or after air cooling heat exchanger heat release, enter shell side, the insufficient section of the cold of the natural cooling source absorbed for the air-cooled heat exchange of supplementary employing; Or when completely providing system cold by air cooling heat exchanger, enter shell side with the form of condensate liquid; The second refrigerant reaching setting thermal parameter is stored in liquid storage district.
The design feature of the utility model shell-tube type multifunctional heat exchanger is also: described heat exchange tube bundle is made up of the evaporation tube group of the vapor compression refrigeration system of at least two group independent operatings, comprises the first evaporation tube group and the second evaporation tube group.
The design feature of the utility model shell-tube type multifunctional heat exchanger is also: described first evaporation tube group and the second evaporation tube group are employing two flow process unsymmetric structures, and described two flow process unsymmetric structures refer to:
In described first evaporation tube group, the heat exchanger tube quantity of first pass pipe group is the heat exchanger tube quantity 1/3 to two/4th of the second flow process pipe group;
In described second evaporation tube group, the heat exchanger tube quantity of first pass pipe group is the heat exchanger tube quantity 1/3 to two/4th of the second flow process pipe group.
The design feature of the utility model shell-tube type multifunctional heat exchanger is also: between described head plate and tube sheet, arrange the sealing that sealing gasket forms head plate and tube sheet, the sealing surface of described head plate is provided with head plate seal groove, comprises the head plate straight trough on the head plate annular groove and diverse location of the setting of head plate circumference; The sealing surface of described tube sheet is provided with tube sheet seal groove, comprises the tube sheet straight trough on the tube sheet annular groove and diverse location of the setting of tube sheet plate circumference.
The design feature of the utility model shell-tube type multifunctional heat exchanger is also: described homogenizing plate is welded on the madial wall of described horizontal shell and tube, and the through hole on described homogenizing plate is for being uniformly distributed.
Compared with the prior art, the utility model beneficial effect is embodied in:
1, the utility model adopts shell-tube type structure, evaporative condenser or dry evaporator and reservoir are become one, package is arranged under air cooling heat exchanger, can guarantee that the outlet of air cooling heat exchanger and the second refrigerant inlet of shell-tube type multifunctional heat exchanger have suitable drop (as shown in Figure 6), avoid adopting the setting height(from bottom) problem that produces of plate type heat exchanger, make refrigerant flow smooth and easy, space structure is compact, integral layout is attractive in appearance.
2, run using heat exchange tube bundle as the evaporimeter of vapor compression refrigeration system at high temperature season and transition season in the utility model.At high temperature season, whole low-temperature receiver is provided by vapor compression refrigeration system, shell-tube type multifunctional heat exchanger is directly being entered with the second refrigerant overheated gas of cold side evaporation endothermic, first refrigerant evaporates at tube side, by entering the second refrigerant condensation of shell side and crossing cold and be stored in liquid storage district, comprised the control of pressure and temperature by the thermal parameter regulating the refrigerating capacity of vapor compression refrigeration system to realize the second refrigerant liquid storage; At transition season, the oepration at full load of air-cooled loop, not enough cold is provided by vapor compression refrigeration system, and the second refrigerant enters shell side after air cooling heat exchanger heat release, is comprised the control of pressure and temperature by the thermal parameter regulating the refrigerating capacity of vapor compression refrigeration system to realize liquid storage; Thered is provided by air-cooled loop at the whole low-temperature receiver of low temperature season, comprised the control of pressure and temperature by the thermal parameter regulating air cooling heat exchanger emission capacity to realize liquid storage, now shell-tube type multifunctional heat exchanger is only as reservoir.Adopt the design that shell-tube type structure and heat exchange tube bundle are made up of the evaporation tube group of the vapor compression refrigeration system of multiple independent operating, refrigerating capacity is regulated convenient, the control that the thermal parameter of liquid storage comprises pressure and temperature is more accurate, thus realize the precise hard_drawn tuhes of air-conditioner temperature and the energy-conservation of air-conditioning system, be more conducive to effective utilization of natural cooling source.
3, in the utility model, the evaporation tube group of heat exchange tube bundle adopts design that is asymmetric, two flow processs, and in first pass, the first refrigerant is mainly liquid, and volume flow is little, and the pipe number of design is few; In second flow process, the amount of liquid of the first refrigerant reduces gradually, and volume flow increases gradually, and the pipe number of design is many; This design makes the speed of whole flow channel relatively uniform, and heat exchange efficiency is high, flow resistance is little, and refrigeration compressor oil return is smooth and easy.
4, the utility model arranges homogenizing plate in the upper end of evaporation tube bundle, is beneficial to the second refrigerant of inflow evenly by heat exchange tube bundle, improves heat exchange efficiency.
5, the utility model processes seal groove on the sealing surface of head plate and tube sheet, enhances sealing therebetween, effectively can prevent coolant leakage.
Accompanying drawing explanation
Fig. 1 a is the main TV structure schematic diagram of the utility model;
Fig. 1 b and Fig. 1 c is respectively left view and the right view of Fig. 1 a;
Fig. 1 d is close-up schematic view A in Fig. 1 a;
Fig. 2 is the schematic diagram of head plate in the utility model;
Fig. 3 is the schematic diagram of tube sheet in the utility model;
Fig. 4 is sealing gasket sectional view in the utility model;
Fig. 5 is homogenizing plate schematic diagram in the utility model;
Fig. 6 is the outdoor unit schematic front view of application air conditioner in machine room of the present utility model;
Number in the figure: 1 shell-tube type multifunctional heat exchanger, 1a package, the import of 1b second refrigerant, 1c second refrigerant exit, 2 tube sheets, 2a tube sheet annular groove, 2b tube sheet straight trough, 3 sealing gaskets, 4 head plates, the import of 4a first refrigerant, 4b first refrigerant exit, 4c head plate annular groove, 4e head plate straight trough, 5 homogenizing plates, 6 heat exchange tube bundles, 6a first evaporation tube group, 6b second evaporation tube group, 7 liquid storage districts, the outer collar bolt of 8a, bolt in the middle part of 8b, 9a first pass heat exchanger tube, 9b second flow process heat exchanger tube, 10 blower fans, 11 air cooling heat exchanger assemblies, 12 compressors.
Detailed description of the invention
See Fig. 1 a, Fig. 1 b, Fig. 1 c and Fig. 1 d, in the present embodiment, the version of shell-tube type multifunctional heat exchanger is:
Heat exchanger is welded with tube sheet 2 respectively at the two ends of the horizontal shell and tube 1a in level, and head plate 4 adopts bolted in the outside of tube sheet 2; In horizontal shell and tube 1a, the bottom being positioned at horizontal shell and tube 1a is liquid storage district 7, and the middle part being positioned at horizontal shell and tube 1a arranges heat exchange tube bundle 6, and the top being positioned at horizontal shell and tube 1a is provided with the homogenizing plate 5 of through hole, and the heat exchanger tube expanded joint in heat exchange tube bundle 6 is on two ends tube sheet 2.
End socket 4 arranges the first refrigerant import 4a be connected with heat exchange tube bundle 6 and the first refrigerant exit 4b and forms tube side, first refrigerant that circulates in tube side forms the evaporation side in vapor compression refrigeration loop.
Second refrigerant import 1b is set at the top of horizontal shell and tube 1a, second refrigerant exit 1c is set in the bottom of horizontal shell and tube 1a and forms shell side, circulate the second refrigerant in shell side, under different external environment conditions, described second refrigerant or enter shell side with the form of overheated gas, and cooled in shell side or condensation; Or after air cooling heat exchanger heat release, enter shell side, the insufficient section of the cold of the natural cooling source absorbed for the air-cooled heat exchange of supplementary employing; Or when completely providing system cold by air cooling heat exchanger, enter shell side with the form of condensate liquid; The second refrigerant reaching setting thermal parameter is stored in liquid storage district 7.
In the present embodiment, heat exchange tube bundle 6 is made up of the evaporation tube group of the vapor compression refrigeration system of two groups of independent operatings, evaporation tube group comprises the first evaporation tube group 6a and the second evaporation tube group 6b, and the first evaporation tube group 6a and the second evaporation tube group 6b is employing two flow process unsymmetric structure, and two flow process unsymmetric structures refer to:
In the first evaporation tube group 6a, the heat exchanger tube quantity of first pass pipe group is 1/3 to two/4th of the heat exchanger tube quantity of the second flow process pipe group; In the second evaporation tube group 6b, the heat exchanger tube quantity of first pass pipe group is 1/3 to two/4th of the heat exchanger tube quantity of the second flow process pipe group.As shown in Figure 1, Figure 3, in the present embodiment, the first evaporation tube group 6a and the second evaporation tube group 6b all adopts asymmetric, two flowage structures, and the pipe number of first pass heat exchanger tube 9a is about 2/3rds of the pipe number of the second flow process heat exchanger tube 9b.First refrigerant enters tube side with liquid condition, and along flow process fluid interchange, liquid heat absorption is gasified gradually, and volume flow increases gradually; The volume flow of first pass is relatively little, and heat exchanger tube number is few; The volume flow of the second flow process is large, and heat exchanger tube number is many.This design makes the speed of whole flow channel relatively uniform, and heat exchange efficiency is high; Compared with the design of the symmetrical structure of routine, accelerate the flowing velocity of first pass refrigerant, ensure that refrigeration compressor oil return is smooth and easy, and reduce the flow resistance of the second flow process refrigerant.
As shown in Figure 2, Figure 3 and Figure 4, sealing gasket is set between head plate 4 and tube sheet 2 and forms sealing between head plate 4 and tube sheet 2, the sealing surface of head plate 4 is provided with head plate seal groove, comprise as shown in Figure 2 along head plate circumference arrange head plate annular groove 4c and diverse location on head plate straight trough 4e; As shown in Figure 3 on the sealing surface of tube sheet 2, be provided with tube sheet seal groove, comprise along tube sheet circumference arrange tube sheet annular groove 2a and diverse location on tube sheet straight trough 2b.Sealing gasket 3 as shown in Figure 4 take acrylonitrile-butadiene rubber as material, and the local material of sealing gasket 3 in embedding sealing groove, further enhancing head plate 4 and the sealing of tube sheet 2, prevents coolant leakage under the effect of bolt 8a, bolt 8b fastening force; That head plate 4 and tube sheet 2 are undertaken fastening by bolt as shown in fig. 1b and fig. lc, comprise outer collar bolt 8a and middle part bolt 8b, to ensure that on sealing surface, fastening stress distribution is even, avoid because local pressure inequality causes the two deformation and occur poorly sealed problem.
As shown in figs. 1a and 5, the homogenizing plate 5 in the present embodiment is welded on the madial wall of horizontal shell and tube 1a, and the through hole on homogenizing plate 5 is for being uniformly distributed, and in concrete enforcement, arranging through hole is circular hole.
As shown in Figure 6, in this example, the outdoor unit of air conditioner in machine room forms primarily of blower fan 10, air cooling heat exchanger assembly 11, shell-tube type multifunctional heat exchanger 1 and compressor 12; Shell-tube type multifunctional heat exchanger 1 is arranged under air cooling heat exchanger assembly 11, can guarantee, between the outlet of air cooling heat exchanger assembly 11 and the second refrigerant inlet 1b of shell-tube type multifunctional heat exchanger 1, there is suitable drop, make refrigerant flow smooth and easy, space structure is compact, integral layout is attractive in appearance.
In the present embodiment, shell-tube type multifunctional heat exchanger 1 is steam compressed/heat pipe combined refrigeration unit being applied to air conditioner in machine room, by controlling the operation number of units of refrigeration compressor 12 and the operation number of units of frequency or outdoor fan 10 and frequency, the wide cut change of quick response machine room thermic load, accurately controls the thermal parameter of liquid storage.At high temperature season, whole low-temperature receiver is provided by vapor compression refrigeration system, shell-tube type multifunctional heat exchanger 1 is directly being entered with the second refrigerant overheated gas of cold side evaporation endothermic, first refrigerant evaporates at tube side, by entering the second refrigerant condensation of shell side and crossing cold and be stored in liquid storage district 7, comprised the control of pressure and temperature by the thermal parameter regulating the refrigerating capacity of vapor compression refrigeration system to realize liquid storage; At transition season, the oepration at full load of air-cooled loop, not enough cold is provided by vapor compression refrigeration system, and the second refrigerant enters shell side after air cooling heat exchanger heat release, is comprised the control of pressure and temperature by the thermal parameter regulating the refrigerating capacity of vapor compression refrigeration system to realize liquid storage; Thered is provided by air-cooled loop at the whole low-temperature receiver of low temperature season, comprised the control of pressure and temperature by the thermal parameter regulating air cooling heat exchanger emission capacity to realize liquid storage, at this moment shell-tube type multifunctional heat exchanger 1 only uses as reservoir.The design that shell-tube type structure and heat exchange tube bundle 6 are made up of evaporation tube group 6a, the evaporation tube group 6b of the vapor compression refrigeration system of multiple independent operating is adopted in the present embodiment, refrigerating capacity is regulated convenient, the control of the thermal parameter of liquid storage is more accurate, thus realize the precise hard_drawn tuhes of air conditioner in machine room and the energy-conservation of air-conditioning system, be more conducive to effective utilization of natural cooling source.
For air-cooled/steam compressed compound-refrigerating air-conditioner set of data center, it is complex as a whole by shell-tube type multifunctional heat exchanger 1 by air-cooled closed circuit and vapor compression refrigeration system, in transition season and the air-cooled closed circuit work of low temperature season, utilize the compressor cooling of natural cooling source Some substitute or completely alternative high power consumption, maximum using outdoor cold source, realizes energy-conservation.If environment temperature is 15 DEG C, now air-conditioning system is operated in air-cooled/steam compressed compound-refrigerating operating mode, air-cooled periodic duty, second refrigerant enters the shell side of shell-tube type multifunctional heat exchanger 1 after outdoor air cooling heat exchanger heat release, heat exchange is carried out with heat exchange tube bundle 6, condensation, the excessively cold refrigerant liquid for setting thermal parameter, be stored in the refrigerant liquid storage district 7 of bottom, by canned motor pump, the refrigerant of storage being transported to indoor heat exchanger absorbs heat; The homogenizing plate 5 being placed in heat exchange tube bundle 7 upper end can ensure that refrigerant uniform flows heat exchange tube bundle 6, and heat exchange is more efficient; Adopt shell-tube type multifunctional heat exchanger 1 not only can maximizedly realize energy-conservation, and realize the integrated of both condenser/evaporator and reservoir function, avoid the problem of plate type heat exchanger setting height(from bottom), make set structure compacter, attractive in appearance.

Claims (5)

1. a shell-tube type multifunctional heat exchanger, is characterized in that:
Described heat exchanger is welded with tube sheet (2) respectively at the two ends of the horizontal shell and tube (1a) in level, and head plate (4) adopts bolted in the outside of described tube sheet (2); In described horizontal shell and tube (1a), the bottom being positioned at horizontal shell and tube (1a) is liquid storage district (7), the middle part being positioned at horizontal shell and tube (1a) arranges heat exchange tube bundle (6), the top being positioned at horizontal shell and tube (1a) is provided with the homogenizing plate (5) of through hole, and the heat exchanger tube expanded joint in described heat exchange tube bundle (6) is on two ends tube sheet (2);
Above arrange the first refrigerant import (4a) of being connected with heat exchange tube bundle (6) and the first refrigerant exit (4b) forms tube side at described end socket (4), first refrigerant that circulates in described tube side forms the evaporation side in vapor compression refrigeration loop;
Second refrigerant import (1b) is set at the top of described horizontal shell and tube (1a), second refrigerant exit (1c) is set in the bottom of described horizontal shell and tube (1a) and forms shell side, circulate the second refrigerant in described shell side, under different external environment conditions, described second refrigerant or enter shell side with the form of overheated gas, and cooled in shell side or condensation; Or after air cooling heat exchanger heat release, enter shell side, the insufficient section of the cold of the natural cooling source absorbed for the air-cooled heat exchange of supplementary employing; Or when completely providing system cold by air cooling heat exchanger, enter shell side with the form of condensate liquid; The second refrigerant reaching setting thermal parameter is stored in liquid storage district (7).
2. shell-tube type multifunctional heat exchanger according to claim 1, it is characterized in that: described heat exchange tube bundle (6) is made up of the evaporation tube group of the vapor compression refrigeration system of at least two group independent operatings, comprise the first evaporation tube group (6a) and the second evaporation tube group (6b).
3. shell-tube type multifunctional heat exchanger according to claim 2, is characterized in that: described first evaporation tube group (6a) and the second evaporation tube group (6b) are employing two flow process unsymmetric structures, and described two flow process unsymmetric structures refer to:
In described first evaporation tube group (6a), the heat exchanger tube quantity of first pass pipe group is the heat exchanger tube quantity 1/3 to two/4th of the second flow process pipe group;
In described second evaporation tube group (6b), the heat exchanger tube quantity of first pass pipe group is the heat exchanger tube quantity 1/3 to two/4th of the second flow process pipe group.
4. shell-tube type multifunctional heat exchanger according to claim 1, it is characterized in that: the sealing that sealing gasket (3) forms head plate (4) and tube sheet (2) is set between described head plate (4) and tube sheet (2), the sealing surface of described head plate (4) is provided with head plate seal groove, comprises the head plate straight trough (4e) on the head plate annular groove (4c) and diverse location of the setting of head plate circumference; The sealing surface of described tube sheet (2) is provided with tube sheet seal groove, comprises the tube sheet straight trough (2b) on the tube sheet annular groove (2a) and diverse location of the setting of tube sheet plate circumference.
5. shell-tube type multifunctional heat exchanger according to claim 1, is characterized in that: described homogenizing plate (5) is welded on the madial wall of described horizontal shell and tube (1a), and the through hole on described homogenizing plate (5) is for being uniformly distributed.
CN201520169563.3U 2015-03-24 2015-03-24 A kind of shell-tube type multifunctional heat exchanger Active CN204494920U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104697247A (en) * 2015-03-24 2015-06-10 中国扬子集团滁州扬子空调器有限公司 Shell-and-tube multifunctional heat exchanger
CN105202829A (en) * 2015-09-02 2015-12-30 珠海格力电器股份有限公司 Condensation and liquid storage device as well as refrigerating unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104697247A (en) * 2015-03-24 2015-06-10 中国扬子集团滁州扬子空调器有限公司 Shell-and-tube multifunctional heat exchanger
CN105202829A (en) * 2015-09-02 2015-12-30 珠海格力电器股份有限公司 Condensation and liquid storage device as well as refrigerating unit

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