CN114705063B - High-efficiency heat exchange vaporizer - Google Patents
High-efficiency heat exchange vaporizer Download PDFInfo
- Publication number
- CN114705063B CN114705063B CN202210316597.5A CN202210316597A CN114705063B CN 114705063 B CN114705063 B CN 114705063B CN 202210316597 A CN202210316597 A CN 202210316597A CN 114705063 B CN114705063 B CN 114705063B
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- Prior art keywords
- shell
- spiral
- inlet
- spiral pipe
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000006200 vaporizer Substances 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000008016 vaporization Effects 0.000 claims description 7
- 238000009834 vaporization Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 30
- 229910052739 hydrogen Inorganic materials 0.000 description 26
- 239000001257 hydrogen Substances 0.000 description 26
- 239000007788 liquid Substances 0.000 description 25
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 24
- 125000006850 spacer group Chemical group 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008014 freezing Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a high-efficiency heat exchange vaporizer, which comprises: the shell is used for introducing high-temperature medium, a shell side inlet and a shell side outlet are formed in the side wall of the shell, a spiral pipe used for introducing low-temperature medium is arranged in the shell, the spiral pipe is spirally wound inside the shell from front to back along the axial direction of the shell, the inlet end of the spiral pipe extends out of the shell from the front portion of the shell in a sealing manner, the outlet end of the spiral pipe extends out of the shell from the rear portion of the shell in a sealing manner, and the inlet pipe section of the spiral pipe is arranged in a trend that the spiral pitch diameter is gradually increased from front to back. The invention has the advantages that: the heat exchange efficiency can be improved, the icing probability of the inlet pipe section of the spiral pipe in the water bath type heat exchanger is effectively reduced, and the use stability and the use safety are high.
Description
Technical Field
The invention relates to the technical field of cryogenic vaporization, in particular to a high-efficiency heat exchange vaporizer.
Background
The on-board liquid hydrogen bottle must be vaporized by a heat exchange vaporizer before hydrogen is supplied to the fuel cell. The most of the existing evaporators are water bath evaporators. The construction of a water bath vaporizer generally includes: the shell is used for introducing high-temperature medium, a shell side inlet and a shell side outlet are formed in the side wall of the shell, a spiral pipe used for introducing low-temperature medium is arranged in the shell, the spiral pipe is spirally wound in the shell from front to back along the axial direction of the shell, the inlet end of the spiral pipe extends out of the shell from the front portion of the shell in a sealing manner, and the outlet end of the spiral pipe extends out of the shell from the rear portion of the shell in a sealing manner. The water bath type vaporizer has the following defects: after low-temperature liquid hydrogen directly enters the water bath type heat exchanger, the inlet pipe section of the spiral pipe in the water bath type heat exchanger is extremely easy to freeze for a long distance, so that the heat exchange efficiency is low.
Disclosure of Invention
The invention aims to provide a high-efficiency heat exchange vaporizer capable of improving heat exchange efficiency.
In order to achieve the above purpose, the invention adopts the following technical scheme: a high efficiency heat exchange vaporizer comprising: the shell is used for introducing high-temperature medium, a shell side inlet and a shell side outlet are formed in the side wall of the shell, a spiral pipe used for introducing low-temperature medium is arranged in the shell, the spiral pipe is spirally wound inside the shell from front to back along the axial direction of the shell, the inlet end of the spiral pipe extends out of the shell from the front portion of the shell in a sealing manner, the outlet end of the spiral pipe extends out of the shell from the rear portion of the shell in a sealing manner, and the inlet pipe section of the spiral pipe is arranged in a trend that the spiral pitch diameter is gradually increased from front to back.
Further, a high efficiency heat exchange vaporizer as described above, wherein: the spiral outer tube is sleeved outside the inlet pipe section of the spiral tube, the inlet end of the spiral outer tube extends out of the shell from the front part of the shell in a sealing mode, a high-temperature medium inlet spiral flow passage communicated with the inside of the shell is formed between the inner wall of the spiral outer tube and the outer wall of the spiral tube, the inlet of the high-temperature medium inlet spiral flow passage is a shell side inlet of the shell, and the spiral outer tube is arranged in a trend that the spiral pitch diameter is gradually increased from front to back.
Further, a high efficiency heat exchange vaporizer as described above, wherein: the front section of the shell corresponding to the inlet pipe section of the spiral pipe is in a conical shape with the caliber gradually increased from front to back, a conical spacer is arranged in the front section of the shell, the caliber of the conical spacer gradually increased from front to back, a high-temperature medium inlet conical flow channel communicated with the inside of the shell is formed between the outer wall of the conical spacer and the inner wall of the front section of the shell, a shell side inlet of the shell is arranged on the outer wall of the front end of the front section of the shell, and the inlet pipe section of the spiral pipe is arranged in the high-temperature medium inlet conical flow channel.
Further, a high efficiency heat exchange vaporizer as described above, wherein: the pitch of the inlet pipe section of the spiral pipe is set in a fixed length.
Further, a high efficiency heat exchange vaporizer as described above, wherein: the pitch of the inlet pipe section of the spiral pipe is set in a variable pitch mode.
Through implementation of the technical scheme, the invention has the beneficial effects that: the heat exchange efficiency can be improved, the icing probability of the inlet pipe section of the spiral pipe in the water bath type heat exchanger is effectively reduced, and the use stability and the use safety are high.
Drawings
Fig. 1 is a schematic structural diagram of a high-efficiency heat exchange vaporizer according to a first embodiment.
Fig. 2 is a schematic view of the structure in the left view direction of fig. 1.
Fig. 3 is a schematic view of the structure of section A-A shown in fig. 2.
Fig. 4 is a schematic view of the structure of the section B-B shown in fig. 2.
Fig. 5 is a schematic structural diagram of a high-efficiency heat exchange vaporizer according to a second embodiment.
Fig. 6 is a schematic view of the structure in the left view direction of fig. 5.
Fig. 7 is a schematic diagram of the structure in the right view direction of fig. 5.
Fig. 8 is a schematic structural view of the C-C section shown in fig. 5.
Fig. 9 is a schematic structural diagram of a high-efficiency heat exchange vaporizer according to a third embodiment.
Fig. 10 is a schematic view of the structure in the left view direction of fig. 9.
Fig. 11 is a schematic diagram of the structure in the right view direction of fig. 9.
Fig. 12 is a schematic structural view of the E-E section shown in fig. 9.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
Detailed description of the preferred embodiments
As shown in fig. 1, 2, 3 and 4, the efficient heat exchange vaporizer comprises: the high-temperature medium-introducing device comprises a shell 1 for introducing high-temperature medium, wherein a shell side inlet 2 and a shell side outlet 3 are arranged on the side wall of the shell 1, a spiral pipe 4 for introducing low-temperature medium is arranged in the shell 1, the spiral pipe 4 is spirally wound in the shell 1 from front to back along the axial direction of the shell 1, an inlet end 41 of the spiral pipe 4 extends out of the shell 1 from the front of the shell 1 in a sealing manner, an outlet end 42 of the spiral pipe 4 extends out of the shell 1 from the rear of the shell 1 in a sealing manner, and an inlet pipe section d of the spiral pipe 4 is arranged in a trend that the spiral pitch diameter gradually increases from front to back; the pitch of the inlet pipe section d of the spiral pipe 4 can be set in a fixed length mode or in a variable pitch mode.
During operation, a high-temperature medium (hot water) is continuously introduced into the shell 1 through the shell side inlet 2, meanwhile, low-temperature liquid hydrogen is introduced into the spiral pipe 4 through the inlet end 41, in the process that the low-temperature liquid hydrogen passes through the spiral pipe 4, heat is transferred to the outer wall of the spiral pipe 4 through convection heat exchange between the hot water flowing in the shell 1 and the outer wall of the spiral pipe 4, the high Wen Waibi of the spiral pipe 4 transfers the heat to the inner wall through heat transfer, finally, the heat transfer is realized through the convection heat exchange between the inner wall and the low-temperature liquid hydrogen, and finally, the heat transfer from the hot water to the low-temperature liquid hydrogen is completed, so that the vaporization of the low-temperature liquid hydrogen is realized; due to the structural characteristics of the spiral tube 4, the axial speeds of the fluids in the section are different, meanwhile, the fluid on the inner side moves outwards under the action of centrifugal force, the flow direction speed of the fluid on the outer side is reduced under the action of viscous force, and when the centrifugal force is smaller than the axial pressure gradient, backflow is caused, and secondary backflow is finally formed; and because the inlet pipe section of the spiral pipe 4 is arranged in a trend that the spiral pitch diameter gradually increases from front to back, the secondary reflux in the spiral pipe is enhanced, so that the heat exchange coefficient of the inner wall of the inlet pipe section of the spiral pipe is improved, the heat exchange effect of hot water and low-temperature liquid hydrogen is further improved, the temperature of the low-temperature liquid hydrogen entering the spiral pipe is rapidly increased to be above the freezing point of the hot water, and the freezing probability of the inlet pipe section of the spiral pipe is reduced.
Second embodiment
As shown in fig. 5, 6, 7 and 8, the efficient heat exchange vaporizer comprises: the device comprises a shell 1 for introducing high-temperature medium, wherein a shell side inlet 2 and a shell side outlet 3 are arranged on the side wall of the shell 1, a spiral pipe 4 for introducing low-temperature medium is arranged in the shell 1, the spiral pipe 4 is spirally wound in the shell 1 from front to back along the axial direction of the shell 1, the inlet end of the spiral pipe 4 extends out of the shell 1 from the front of the shell 1 in a sealing manner, the outlet end of the spiral pipe 4 extends out of the shell 1 from the rear of the shell 1 in a sealing manner, and an inlet pipe section d of the spiral pipe 4 is arranged in a trend that the spiral medium diameter gradually increases from front to back; a spiral outer tube 5 is sleeved outside an inlet tube section d of the spiral tube 4, an inlet end of the spiral outer tube 5 extends out of the shell 1 from the front part of the shell 1 in a sealing way, a high-temperature medium inlet spiral flow channel 6 communicated with the inside of the shell is formed between the inner wall of the spiral outer tube 5 and the outer wall of the spiral tube, the inlet of the high-temperature medium inlet spiral flow channel 6 is a shell side inlet 2 of the shell 1, and the spiral outer tube 5 is arranged in a trend that the spiral pitch diameter gradually increases from front to back; the pitch of the inlet pipe section d of the spiral pipe 4 can be set in a fixed length mode or in a variable pitch mode.
During operation, high-temperature medium (hot water) is continuously introduced into the high-temperature medium inlet spiral flow passage 6 from the shell side inlet 2, then introduced into the shell 1 through the high-temperature medium inlet spiral flow passage 6, and meanwhile, low-temperature liquid hydrogen is introduced into the spiral pipe 4 from the inlet end 41; in the process that low-temperature liquid hydrogen passes through the spiral pipe 4, heat is transferred to the outer wall of the spiral pipe 4 by convection heat exchange between hot water flowing in the shell 1 and the outer wall of the spiral pipe 4, heat is transferred to the inner wall by high Wen Waibi of the spiral pipe 4 through heat conduction, heat transfer is realized by the heat transfer between the inner wall and the low-temperature liquid hydrogen finally, heat transfer from hot water to the low-temperature liquid hydrogen is finally completed, and vaporization of the low-temperature liquid hydrogen is realized.
In the low-temperature liquid hydrogen vaporization process, on one hand, the inlet pipe section of the spiral pipe 4 is arranged in a trend that the spiral pitch diameter gradually increases from front to back, so that secondary reflux in the spiral pipe is enhanced, the heat exchange coefficient of the inner wall of the inlet pipe section of the spiral pipe is improved, the heat exchange effect of hot water and low-temperature liquid hydrogen is further improved, the temperature of the low-temperature liquid hydrogen entering the spiral pipe is rapidly increased to be higher than the freezing point of the hot water, and the icing probability of the inlet section of the spiral pipe is reduced; on the other hand, by arranging the spiral outer tube 5 outside the spiral tube 4 and arranging the spiral outer tube 5 in a trend that the spiral medium diameter gradually increases from front to back, the heat exchange coefficient of the outer wall of the inlet pipe section of the spiral tube is improved by utilizing the secondary flow principle, and the flow velocity of hot water in the high-temperature medium inlet spiral flow channel 6 can be greatly increased, so that the heat exchange coefficient of the hot water and the outer wall of the inlet pipe section of the spiral tube is further improved; meanwhile, as the spiral outer pipe is always immersed in the hot water in the shell, the hot water always provides heat for the spiral outer pipe, so that the high-temperature hot water is ensured to be kept at the moment of the high-temperature medium inlet spiral flow passage 6, and the probability of icing of the inlet pipe section of the spiral pipe in the high-temperature medium inlet spiral flow passage 6 is reduced.
Detailed description of the preferred embodiments
As shown in fig. 9, 10, 11 and 12, the high-efficiency heat exchange vaporizer includes: the high-temperature medium-introducing device comprises a shell 1 for introducing high-temperature medium, wherein a shell side inlet 2 and a shell side outlet 3 are arranged on the side wall of the shell 1, a spiral pipe 4 for introducing low-temperature medium is arranged in the shell 1, the spiral pipe 4 is spirally wound in the shell 1 from front to back along the axial direction of the shell 1, an inlet end 41 of the spiral pipe 4 extends out of the shell 1 from the front of the shell 1 in a sealing manner, an outlet end 42 of the spiral pipe 4 extends out of the shell 1 from the rear of the shell 1 in a sealing manner, and an inlet pipe section d of the spiral pipe 4 is arranged in a trend that the spiral pitch diameter gradually increases from front to back; the front section of the shell 1 corresponding to the inlet pipe section d of the spiral pipe 4 is in a conical shape with the caliber gradually increasing from front to back, a conical spacer 7 is arranged in the front section of the shell 1, the caliber of the conical spacer 7 gradually increasing from front to back, a high-temperature medium inlet conical flow channel 8 communicated with the inside of the shell 1 is formed between the outer wall of the conical spacer 7 and the inner wall of the front section of the shell 1, a shell side inlet 2 of the shell 1 is arranged on the outer wall of the front end of the front section of the shell 1, and the inlet pipe section d of the spiral pipe 4 is arranged in the high-temperature medium inlet conical flow channel 8; the pitch of the inlet pipe section d of the spiral pipe 4 can be set in a fixed length mode or in a variable pitch mode.
During operation, high-temperature medium (hot water) is continuously introduced into the high-temperature medium inlet conical flow passage 8 from the shell side inlet 2, then introduced into the shell 1 through the high-temperature medium inlet conical flow passage 8, and meanwhile, low-temperature liquid hydrogen is introduced into the spiral tube 4 from the inlet end 41; in the process that low-temperature liquid hydrogen passes through the spiral pipe 4, heat is transferred to the outer wall of the spiral pipe 4 by convection heat exchange between hot water flowing in the shell 1 and the outer wall of the spiral pipe 4, heat is transferred to the inner wall by high Wen Waibi of the spiral pipe 4 through heat conduction, heat transfer is realized by the heat transfer between the inner wall and the low-temperature liquid hydrogen finally, heat transfer from hot water to the low-temperature liquid hydrogen is finally completed, and vaporization of the low-temperature liquid hydrogen is realized.
In the low-temperature liquid hydrogen vaporization process, on one hand, the inlet pipe section of the spiral pipe 4 is arranged in a trend that the spiral pitch diameter gradually increases from front to back, so that secondary reflux in the spiral pipe is enhanced, the heat exchange coefficient of the inner wall of the inlet pipe section of the spiral pipe is improved, the heat exchange effect of hot water and low-temperature liquid hydrogen is further improved, the temperature of the low-temperature liquid hydrogen entering the spiral pipe is rapidly increased to be higher than the freezing point of the hot water, and the icing probability of the inlet section of the spiral pipe is reduced; on the other hand, through set up the toper spacer in the casing anterior segment inside, reduced the hot water flow area in the casing anterior segment, improved the velocity of flow of hot water in the casing anterior segment to improved the heat transfer coefficient of hot water and the outer wall of spiral pipe inlet tube section, further reduced the spiral pipe inlet section and iced probability.
The above description is only of the preferred embodiment of the present invention, and is not intended to limit the present invention in any other way, but any modifications or equivalent variations according to the technical spirit of the present invention are still included in the scope of the present invention.
Claims (3)
1. A high efficiency heat exchange vaporizer comprising: the shell for letting in high temperature medium is provided with shell side entry and shell side export on the lateral wall of casing, is provided with the spiral pipe that is used for letting in low temperature medium in the inside of casing, and the spiral pipe is the heliciform from front to back along the casing axial and coils in the casing is inside, and the casing is sealed to stretch out from the casing front portion to the entry end of spiral pipe, and the casing is sealed to stretch out from the casing rear portion to the exit end of spiral pipe, its characterized in that: the inlet pipe section of the spiral pipe is arranged in a trend that the pitch diameter of the spiral pipe gradually increases from front to back; the spiral outer tube is sleeved outside the inlet pipe section of the spiral tube, the inlet end of the spiral outer tube extends out of the shell from the front part of the shell in a sealing mode, a high-temperature medium inlet spiral flow passage communicated with the inside of the shell is formed between the inner wall of the spiral outer tube and the outer wall of the spiral tube, the inlet of the high-temperature medium inlet spiral flow passage is a shell side inlet of the shell, and the spiral outer tube is arranged in a trend that the spiral pitch diameter is gradually increased from front to back.
2. A high efficiency heat exchange vaporizer as defined in claim 1, wherein: the pitch of the inlet pipe section of the spiral pipe is set in a fixed length.
3. The efficient heat exchange vaporization of claim 1, wherein: the pitch of the inlet pipe section of the spiral pipe is set in a variable pitch mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210316597.5A CN114705063B (en) | 2022-03-29 | 2022-03-29 | High-efficiency heat exchange vaporizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210316597.5A CN114705063B (en) | 2022-03-29 | 2022-03-29 | High-efficiency heat exchange vaporizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114705063A CN114705063A (en) | 2022-07-05 |
| CN114705063B true CN114705063B (en) | 2024-04-02 |
Family
ID=82169907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210316597.5A Active CN114705063B (en) | 2022-03-29 | 2022-03-29 | High-efficiency heat exchange vaporizer |
Country Status (1)
| Country | Link |
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| CN (1) | CN114705063B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB697891A (en) * | 1950-12-07 | 1953-09-30 | Metaux Ouvres Soc Pour | Heat exchanger |
| FR2155770A1 (en) * | 1971-10-04 | 1973-05-25 | Ind Chauffage | Spiral tube heat exchanger - with tubes contacting shell to define shell-side flow |
| US4402361A (en) * | 1980-08-29 | 1983-09-06 | Inquimet Sociedad Anonima Industrial Comercial Y Agraria | Heat exchanger |
| DE19634450A1 (en) * | 1996-08-26 | 1998-03-05 | Basf Ag | Device for the continuous implementation of chemical reactions |
| EP1865266A1 (en) * | 2006-06-08 | 2007-12-12 | Erwin Dietz | Heat exchanger, specially for heat sanitary water |
| CN103822504A (en) * | 2012-11-16 | 2014-05-28 | 南通中集大型储罐有限公司 | Heat exchange jacket, fermentation tank and manufacturing method of heat exchange jacket |
| CN203949198U (en) * | 2014-07-07 | 2014-11-19 | 李�杰 | The multistage retracting device of natural gas fume afterheat |
| CN109405589A (en) * | 2018-11-30 | 2019-03-01 | 华南理工大学 | A kind of spherical heat exchanger that two-tube-pass independently exchanges heat |
| JP2019132470A (en) * | 2018-01-30 | 2019-08-08 | 国立大学法人山梨大学 | Heat collecting and radiating tube and geothermal heat pump using the same |
| CN214469459U (en) * | 2020-10-14 | 2021-10-22 | 无锡市东冠机械制造有限公司 | Condenser |
-
2022
- 2022-03-29 CN CN202210316597.5A patent/CN114705063B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB697891A (en) * | 1950-12-07 | 1953-09-30 | Metaux Ouvres Soc Pour | Heat exchanger |
| FR2155770A1 (en) * | 1971-10-04 | 1973-05-25 | Ind Chauffage | Spiral tube heat exchanger - with tubes contacting shell to define shell-side flow |
| US4402361A (en) * | 1980-08-29 | 1983-09-06 | Inquimet Sociedad Anonima Industrial Comercial Y Agraria | Heat exchanger |
| DE19634450A1 (en) * | 1996-08-26 | 1998-03-05 | Basf Ag | Device for the continuous implementation of chemical reactions |
| EP1865266A1 (en) * | 2006-06-08 | 2007-12-12 | Erwin Dietz | Heat exchanger, specially for heat sanitary water |
| CN103822504A (en) * | 2012-11-16 | 2014-05-28 | 南通中集大型储罐有限公司 | Heat exchange jacket, fermentation tank and manufacturing method of heat exchange jacket |
| CN203949198U (en) * | 2014-07-07 | 2014-11-19 | 李�杰 | The multistage retracting device of natural gas fume afterheat |
| JP2019132470A (en) * | 2018-01-30 | 2019-08-08 | 国立大学法人山梨大学 | Heat collecting and radiating tube and geothermal heat pump using the same |
| CN109405589A (en) * | 2018-11-30 | 2019-03-01 | 华南理工大学 | A kind of spherical heat exchanger that two-tube-pass independently exchanges heat |
| CN214469459U (en) * | 2020-10-14 | 2021-10-22 | 无锡市东冠机械制造有限公司 | Condenser |
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| Publication number | Publication date |
|---|---|
| CN114705063A (en) | 2022-07-05 |
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