CN114705063A - High-efficient heat transfer vaporizer - Google Patents
High-efficient heat transfer vaporizer Download PDFInfo
- Publication number
- CN114705063A CN114705063A CN202210316597.5A CN202210316597A CN114705063A CN 114705063 A CN114705063 A CN 114705063A CN 202210316597 A CN202210316597 A CN 202210316597A CN 114705063 A CN114705063 A CN 114705063A
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- CN
- China
- Prior art keywords
- casing
- spiral
- spiral pipe
- entry
- 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.)
- Granted
Links
- 239000006200 vaporizer Substances 0.000 title claims abstract description 24
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 29
- 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 19
- 150000002431 hydrogen Chemical class 0.000 description 7
- 230000008016 vaporization Effects 0.000 description 6
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009834 vaporization Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009286 beneficial effect 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
Images
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
Abstract
The invention discloses a high-efficiency heat exchange vaporizer, which comprises: the casing is used for letting in high temperature medium, be provided with shell side entry and shell side export on the lateral wall of casing, be provided with the spiral pipe that is used for letting in low temperature medium in the inside of casing, the spiral pipe is coiled in the casing inside by preceding heliciform to the back along the casing axial, the entry end of spiral pipe stretches out the casing from the casing front portion is sealed, the exit end of spiral pipe stretches out the casing from the casing rear portion is sealed, the entry pipeline section of spiral pipe is the trend setting of footpath by preceding to the back grow gradually in the spiral. The invention has the advantages that: the heat exchange efficiency can be improved, the probability of icing 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 cylinder must be vaporized by a heat exchange vaporizer before supplying hydrogen to the fuel cell. Most of the currently used vaporizers are water bath vaporizers. The structure of a water bath vaporizer generally comprises: the spiral pipe is arranged in the shell and is coiled inside the shell in a spiral manner 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 part of the shell in a sealed manner, and the outlet end of the spiral pipe extends out of the shell from the back part of the shell in a sealed manner. The water bath vaporizer described above has disadvantages in that: 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 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 purpose, the invention adopts the following technical scheme: a high efficiency heat exchanging vaporizer, comprising: the casing is used for letting in high temperature medium, be provided with shell side entry and shell side export on the lateral wall of casing, be provided with the spiral pipe that is used for letting in low temperature medium in the inside of casing, the spiral pipe is coiled in the casing inside by preceding heliciform to the back along the casing axial, the entry end of spiral pipe stretches out the casing from the casing front portion is sealed, the exit end of spiral pipe stretches out the casing from the casing rear portion is sealed, the entry pipeline section of spiral pipe is the trend setting of footpath by preceding to the back grow gradually in the spiral.
Further, the foregoing high efficiency heat exchanging vaporizer, wherein: the outside cover of the entry pipeline section at the spiral pipe has spiral outer tube, and the casing is stretched out from the casing front portion is sealed to the entry end of spiral outer tube, forms the inside high temperature medium entry spiral runner of intercommunication casing between the inner wall of spiral outer tube and the outer wall of spiral pipe, and the entry of high temperature medium entry spiral runner is the shell side entry of casing, the spiral outer tube is the trend setting of the footpath by preceding to back grow gradually in the spiral.
Further, the foregoing high efficiency heat exchanging vaporizer, wherein: the casing anterior segment that corresponds with the inlet pipe section of spiral pipe is the bore and is provided with the toper spacer by preceding to the back grow gradually, is provided with the toper spacer in the casing anterior segment, and the bore of toper spacer is by preceding to back grow gradually, forms the inside high temperature medium entry toper runner of intercommunication casing between the outer wall of toper spacer and the inner wall of casing anterior segment, and the shell side entry of casing sets up on the front end outer wall of casing anterior segment, the entry pipeline section of spiral pipe sets up in high temperature medium entry toper runner.
Further, the foregoing high efficiency heat exchanging vaporizer, wherein: the screw pitch of the inlet pipe section of the spiral pipe is set in a fixed length mode.
Further, the foregoing high efficiency heat exchanging vaporizer, wherein: the pitch of the inlet pipe section of the spiral pipe is arranged in a variable pitch mode.
Through the implementation of the technical scheme, the invention has the beneficial effects that: the heat exchange efficiency can be improved, the probability of icing 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 diagram of a high efficiency heat exchanging vaporizer according to a first embodiment.
Fig. 2 is a schematic structural view in a left-side view direction of fig. 1.
Fig. 3 is a schematic structural view of the section a-a shown in fig. 2.
Fig. 4 is a schematic structural view of a B-B section shown in fig. 2.
Fig. 5 is a schematic diagram of a high efficiency heat exchanging vaporizer according to a second embodiment.
Fig. 6 is a schematic structural view in the left-hand direction of fig. 5.
Fig. 7 is a schematic view of the structure in the right view direction of fig. 5.
Fig. 8 is a structural view of the C-C section shown in fig. 5.
Fig. 9 is a schematic diagram of a high efficiency heat exchanging vaporizer according to the third embodiment.
Fig. 10 is a schematic view of the left side view of fig. 9.
Fig. 11 is a schematic view of the right side view of fig. 9.
Fig. 12 is a schematic structural view of the section E-E shown in fig. 9.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
Detailed description of the preferred embodiment
As shown in fig. 1, 2, 3, and 4, the high efficiency heat exchanging vaporizer includes: the shell body 1 is used for introducing a high-temperature medium, a shell pass inlet 2 and a shell pass outlet 3 are arranged on the side wall of the shell body 1, a spiral pipe 4 used for introducing a low-temperature medium is arranged in the shell body 1, the spiral pipe 4 is spirally coiled in the shell body 1 from front to back along the axial direction of the shell body 1, an inlet end 41 of the spiral pipe 4 hermetically extends out of the shell body 1 from the front part of the shell body 1, an outlet end 42 of the spiral pipe 4 hermetically extends out of the shell body 1 from the back part of the shell body 1, and an inlet pipe section d of the spiral pipe 4 is arranged in a manner that the spiral middle diameter gradually increases from front to back; the pitch of the inlet section d of the spiral pipe 4 can be set in a fixed-length mode or in a variable-pitch mode.
When the device works, a high-temperature medium (hot water) is continuously introduced into the shell 1 through the shell pass inlet 2, meanwhile, low-temperature liquid hydrogen is introduced into the spiral tube 4 through the inlet end 41, in the process that the low-temperature liquid hydrogen passes through the spiral tube 4, heat is transferred between hot water flowing in the shell 1 and the outer wall of the spiral tube 4 through convection heat exchange, the heat is transferred to the outer wall of the spiral tube 4, the high-temperature outer wall of the spiral tube 4 transfers the heat to the inner wall through heat conduction, finally, the heat is transferred through the convection heat exchange between the inner wall and the low-temperature liquid hydrogen, the heat transfer from the hot water to the low-temperature liquid hydrogen is finally completed, and the vaporization of the low-temperature liquid hydrogen is realized; due to the structural characteristics of the spiral pipe 4, the axial speeds of the fluids in the cross section are different, meanwhile, under the action of centrifugal force, the fluid on the inner side moves towards the outer side, under the action of viscous force, the flowing speed of the fluid on the outer side is reduced, and when the centrifugal force is smaller than the axial pressure gradient, backflow is caused, and secondary backflow is finally formed; and because the entry pipeline section of spiral pipe 4 is that the trend that the spiral pitch diameter is crescent from the front to back sets up gradually, has strengthened the secondary backward flow in the spiral pipe to improve the heat transfer coefficient of the inner wall of spiral pipe entry pipeline section, and then improved the heat transfer effect of hot water and low temperature liquid hydrogen, the temperature that makes the low temperature liquid hydrogen who gets into the spiral pipe rises to above the freezing point of hot water rapidly, reduces the probability that spiral pipe entry pipeline section freezes.
Detailed description of the invention
As shown in fig. 5, 6, 7, and 8, the high efficiency heat exchanging vaporizer includes: the device comprises a shell 1 for introducing a high-temperature medium, wherein a shell pass inlet 2 and a shell pass outlet 3 are arranged on the side wall of the shell 1, a spiral pipe 4 for introducing a low-temperature medium is arranged in the shell 1, the spiral pipe 4 is spirally coiled in the shell 1 from front to back along the axial direction of the shell 1, the inlet end of the spiral pipe 4 hermetically extends out of the shell 1 from the front part of the shell 1, the outlet end of the spiral pipe 4 hermetically extends out of the shell 1 from the back part of the shell 1, and an inlet pipe section d of the spiral pipe 4 is arranged in a manner that the spiral middle diameter gradually increases from front to back; a spiral outer pipe 5 is sleeved outside an inlet pipe section d of the spiral pipe 4, the inlet end of the spiral outer pipe 5 hermetically extends out of the shell 1 from the front part of the shell 1, a high-temperature medium inlet spiral flow passage 6 communicated with the interior of the shell is formed between the inner wall of the spiral outer pipe 5 and the outer wall of the spiral pipe, the inlet of the high-temperature medium inlet spiral flow passage 6 is a shell pass inlet 2 of the shell 1, and the spiral outer pipe 5 is arranged in a manner that the middle diameter of the spiral gradually increases from front to back; the pitch of the inlet section d of the spiral pipe 4 can be set in a fixed-length mode or in a variable-pitch mode.
When the device works, a high-temperature medium (hot water) is continuously introduced into the high-temperature medium inlet spiral flow channel 6 from the shell pass inlet 2, and then is introduced into the shell 1 through the high-temperature medium inlet spiral flow channel 6, and meanwhile, low-temperature liquid hydrogen is introduced into the spiral pipe 4 from the inlet end 41; at low temperature liquid hydrogen through spiral pipe 4's in-process, the heat transfer that convects between the hot water that casing 1 inside flows and the outer wall of spiral pipe 4, gives spiral pipe 4's outer wall with the heat transfer, and the high temperature outer wall of spiral pipe 4 passes through heat-conduction and gives the inner wall with the heat transfer, and the heat realizes heat transfer through the heat transfer that convects between inner wall and the low temperature liquid hydrogen at last, finally accomplishes hot water to the thermal transmission of low temperature liquid hydrogen, realizes the vaporization to low temperature liquid hydrogen.
In the process of vaporizing the low-temperature liquid hydrogen, on one hand, because the inlet pipe section of the spiral pipe 4 is arranged in a way that the spiral pitch diameter is gradually increased from front to back, the secondary backflow 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 the 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 probability of freezing of the inlet section of the spiral pipe is reduced; on the other hand, the spiral outer pipe 5 is arranged outside the spiral pipe 4, and the spiral outer pipe 5 is arranged in a way that the spiral pitch diameter gradually increases from front to back, so that the heat exchange coefficient of the outer wall of the inlet pipe section of the spiral pipe is improved by utilizing the secondary flow principle, the flow velocity of hot water in the high-temperature medium inlet spiral flow channel 6 can be greatly increased, and the heat exchange coefficient of the hot water and the outer wall of the inlet pipe section of the spiral pipe is further improved; meanwhile, the spiral outer pipe is immersed in the hot water in the shell all the time, and the hot water provides heat for the spiral outer pipe all the time, so that the high-temperature medium inlet spiral flow passage 6 is ensured to keep high-temperature hot water all the time, and the probability of icing of a spiral pipe inlet pipe section in the high-temperature medium inlet spiral flow passage 6 is reduced.
Detailed description of the preferred embodiment
As shown in fig. 9, 10, 11, and 12, the high efficiency heat exchanging vaporizer includes: the shell body 1 is used for introducing a high-temperature medium, a shell pass inlet 2 and a shell pass outlet 3 are arranged on the side wall of the shell body 1, a spiral pipe 4 used for introducing a low-temperature medium is arranged in the shell body 1, the spiral pipe 4 is spirally coiled in the shell body 1 from front to back along the axial direction of the shell body 1, an inlet end 41 of the spiral pipe 4 hermetically extends out of the shell body 1 from the front part of the shell body 1, an outlet end 42 of the spiral pipe 4 hermetically extends out of the shell body 1 from the back part of the shell body 1, and an inlet pipe section d of the spiral pipe 4 is arranged in a manner that the spiral middle 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 arrangement 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 increases from front to back, a high-temperature medium inlet conical flow passage 8 communicated with the interior 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, the 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 passage 8; the pitch of the inlet section d of the spiral pipe 4 can be set in a fixed-length mode or in a variable-pitch mode.
When the device works, a high-temperature medium (hot water) is continuously introduced into the high-temperature medium inlet tapered flow passage 8 from the shell pass inlet 2, and then is introduced into the shell 1 through the high-temperature medium inlet tapered flow passage 8, and meanwhile, low-temperature liquid hydrogen is introduced into the spiral pipe 4 from the inlet end 41; at low temperature liquid hydrogen through spiral pipe 4's in-process, the heat transfer that convects between the hot water that casing 1 inside flows and the outer wall of spiral pipe 4, gives spiral pipe 4's outer wall with the heat transfer, and the high temperature outer wall of spiral pipe 4 passes through heat-conduction and gives the inner wall with the heat transfer, and the heat realizes heat transfer through the heat transfer that convects between inner wall and the low temperature liquid hydrogen at last, finally accomplishes hot water to the thermal transmission of low temperature liquid hydrogen, realizes the vaporization to low temperature liquid hydrogen.
In the process of vaporizing the low-temperature liquid hydrogen, on one hand, because the inlet pipe section of the spiral pipe 4 is arranged in a way that the spiral pitch diameter is gradually increased from front to back, the secondary backflow 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 the 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 probability of freezing of the inlet section of the spiral pipe is reduced; on the other hand, through set up the toper spacer sleeve in casing anterior segment inside, reduced the hot water flow area in the casing anterior segment, improved hydrothermal velocity of flow in the casing anterior segment to improve the heat transfer coefficient of hot water and the outer wall of spiral pipe entry pipeline section, further reduced the probability that the spiral pipe entry section freezes.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made in accordance with the technical spirit of the present invention are within the scope of the present invention as claimed.
Claims (5)
1. A high efficiency heat exchanging vaporizer, comprising: the casing 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 coiled in the casing inside by preceding heliciform to the back along the casing axial, and the casing is stretched out in the anterior sealing of casing to the entry end of spiral pipe, and the casing, its characterized in that are stretched out in the sealed casing rear portion of following of the exit end of spiral pipe: the inlet pipe section of the spiral pipe is arranged in a way that the spiral pitch diameter gradually increases from front to back.
2. The high efficiency heat exchanging vaporizer of claim 1, wherein: the outside cover of the entry pipeline section at the spiral pipe has spiral outer tube, and the casing is stretched out from the casing front portion is sealed to the entry end of spiral outer tube, forms the inside high temperature medium entry spiral runner of intercommunication casing between the inner wall of spiral outer tube and the outer wall of spiral pipe, and the entry of high temperature medium entry spiral runner is the shell side entry of casing, the spiral outer tube is the trend setting of the footpath by preceding to back grow gradually in the spiral.
3. The high efficiency heat exchanging vaporizer of claim 1, wherein: the casing anterior segment that corresponds with the inlet pipe section of spiral pipe is the bore and is provided with the toper spacer by preceding to the back grow gradually, is provided with the toper spacer in the casing anterior segment, and the bore of toper spacer is by preceding to back grow gradually, forms the inside high temperature medium entry toper runner of intercommunication casing between the outer wall of toper spacer and the inner wall of casing anterior segment, and the shell side entry of casing sets up on the front end outer wall of casing anterior segment, the entry pipeline section of spiral pipe sets up in high temperature medium entry toper runner.
4. A high efficiency heat exchanging vaporizer as recited in claim 1, 2 or 3, wherein: the screw pitch of the inlet pipe section of the spiral pipe is arranged in a fixed length mode.
5. A high efficiency heat exchange vaporizer according to claim 1, 2 or 3, wherein: the pitch of the inlet pipe section of the spiral pipe is arranged 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 true CN114705063A (en) | 2022-07-05 |
| CN114705063B CN114705063B (en) | 2024-04-02 |
Family
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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 |
|---|---|
| CN114705063B (en) | 2024-04-02 |
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