CN111928687A - Fluid channel structure of printed circuit board heat exchanger and printed circuit board heat exchanger - Google Patents
Fluid channel structure of printed circuit board heat exchanger and printed circuit board heat exchanger Download PDFInfo
- Publication number
- CN111928687A CN111928687A CN202010712192.4A CN202010712192A CN111928687A CN 111928687 A CN111928687 A CN 111928687A CN 202010712192 A CN202010712192 A CN 202010712192A CN 111928687 A CN111928687 A CN 111928687A
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- CN
- China
- Prior art keywords
- fluid
- heat exchanger
- circuit board
- printed circuit
- board heat
- 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
- 239000012530 fluid Substances 0.000 title claims abstract description 111
- 229920000642 polymer Polymers 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 27
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000243 solution Substances 0.000 description 11
- 230000009471 action Effects 0.000 description 8
- 239000005062 Polybutadiene Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
- F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
- F28D1/035—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other with U-flow or serpentine-flow inside the conduits
-
- 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
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
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)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The embodiment of the invention provides a fluid channel structure of a printed circuit board heat exchanger and the printed circuit board heat exchanger. The fluid channel structure of the printed circuit board heat exchanger provided by the embodiment of the invention comprises an inlet part, wherein the inlet part comprises a fluid inlet pipe and a spiral channel, the fluid inlet pipe is connected with the spiral channel, and the fluid inlet pipe is provided with a polymer injection port for injecting a soluble long-chain polymer into the fluid inlet pipe. According to the fluid channel structure of the printed circuit board heat exchanger provided by the embodiment of the invention, the spiral channel is arranged, and the long-chain polymer is injected into the liquid flow, so that the liquid flow is uniformly distributed in the fluid channel structure, and the heat exchange effect of the printed circuit board heat exchanger is further improved.
Description
Technical Field
The invention relates to the technical field of printed circuit board heat exchangers, in particular to a fluid channel structure of a printed circuit board heat exchanger and the printed circuit board heat exchanger.
Background
The printed circuit board heat exchanger has the advantages of large heat exchange area and good heat exchange effect, and is more and more widely applied. The liquid flow enters the printed circuit board heat exchanger and is distributed to each flow channel through the collecting pipe, the flow channel area of the printed circuit board heat exchanger is small, the resistance is large, and the resistance of each flow channel is basically the same. Current printed circuit board heat exchanger manifold is the constant cross section type usually, and the regional pressure of keeping away from the heat exchanger inlet pipe is high, and the velocity of flow is low, and fluid flow distribution is inhomogeneous in each runner of printed circuit board heat exchanger to lead to the printed circuit board heat exchanger to exert its maximum heat transfer ability.
Disclosure of Invention
The embodiment of the invention provides a fluid channel structure of a printed circuit board heat exchanger and the printed circuit board heat exchanger, which are used for solving the defect that in the prior art, the flow distribution of fluid in each flow channel of the printed circuit board heat exchanger is not uniform, so that the heat exchange efficiency of the printed circuit board heat exchanger is influenced.
The embodiment of the invention provides a fluid channel structure of a printed circuit board heat exchanger, which comprises: the inlet part comprises a fluid inlet pipe and a spiral channel, the fluid inlet pipe is connected with the spiral channel, and a polymer injection port for injecting the soluble long-chain polymer into the fluid inlet pipe is formed in the fluid inlet pipe.
The fluid channel structure of the printed circuit board heat exchanger according to one embodiment of the present invention further includes a fluid flow distribution chamber having two opposite end surfaces extending in a width direction of the fluid channel structure, wherein a distance between the two opposite end surfaces is gradually reduced and then gradually expanded in the width direction from the spiral channel, and a first end surface of the two opposite end surfaces is connected to the spiral channel.
According to the fluid passage structure of a printed circuit board heat exchanger according to an embodiment of the present invention, the fluid flow distribution chamber includes an inlet header, and an end face of the inlet header connected to the spiral passage is configured as a first end face of two opposite end faces of the fluid flow distribution chamber extending in the width direction.
According to the fluid passage structure of a printed circuit board heat exchanger according to one embodiment of the present invention, the fluid flow distribution chamber further includes an outlet header, an end face of which is configured as a second end face of two opposite end faces of the fluid flow distribution chamber extending in the width direction.
According to the fluid passage structure of the printed circuit board heat exchanger of one embodiment of the present invention, the end surface of the inlet header is configured in a planar structure, and the end surface of the outlet header is configured in a tapered and then diverging structure.
According to the fluid passage structure of a printed circuit board heat exchanger of one embodiment of the present invention, the end face of the outlet header is configured in a continuous planar undulation structure or a continuous curved undulation structure.
According to the fluid passage structure of the printed circuit board heat exchanger of one embodiment of the present invention, the fluid flow distribution chamber further includes a chamber body, and both ends of the chamber body are respectively communicated with the inlet header and the outlet header.
The fluid channel structure of the printed circuit board heat exchanger according to one embodiment of the present invention further includes a plurality of sets of flow channels disposed in the cavity, the plurality of sets of flow channels being disposed in parallel in a width direction of the fluid channel structure, and the inlet header and the outlet header being respectively communicated with the flow channels.
The fluid passage structure of a printed circuit board heat exchanger according to an embodiment of the present invention further includes a fluid outlet pipe having one end connected to an end face of the outlet header.
The embodiment of the invention also provides a printed circuit board heat exchanger, which comprises the fluid channel structure of the printed circuit board heat exchanger.
According to the fluid channel structure of the printed circuit board heat exchanger provided by the embodiment of the invention, the spiral channel is arranged, and the long-chain polymer is injected into the liquid flow, so that the liquid flow is uniformly distributed in the fluid channel structure, and the heat exchange effect of the printed circuit board heat exchanger is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a fluid channel structure of a printed circuit board heat exchanger according to an embodiment of the present invention;
FIG. 2 is a front view of the spiral channel shown in FIG. 1;
fig. 3 is a top view of the spiral channel shown in fig. 1.
Reference numerals:
1: a fluid inlet tube; 2: a helical channel; 3: a fluid flow distribution chamber; 4: an inlet header; 5: an outlet header; 6: a cavity; 7: a flow channel; 8: a fluid outlet pipe; 9: a polymer injection port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The fluid passage structure of the printed circuit board heat exchanger according to the embodiment of the present invention will be described with reference to fig. 1 to 3.
As shown in fig. 1, in an embodiment of the present invention, a fluid channel structure of a pcb heat exchanger includes an inlet portion, specifically, the inlet portion includes a fluid inlet tube 1 and a spiral channel 2, the fluid inlet tube 1 is connected to the spiral channel 2, and a polymer injection port 9 is further opened on the fluid inlet tube 1. After the liquid flow enters the fluid inlet pipe 1, the soluble long-chain polymer is injected into the fluid inlet pipe 1 through the polymer injection port 9, after the long-chain polymer solution enters the spiral channel 2, the liquid flow entering the fluid flow distribution cavity 3 has certain centrifugal force under the action of a vortex effect, and the polymer solution shows the long-chain characteristic, so that the liquid flow can quickly flow to a region far away from the spiral channel 2 under the action of the centrifugal force, shows good flow characteristic in the fluid channel structure, and can uniformly pass through the fluid channel structure.
Further, as shown in fig. 2 and 3, the eddy current effect described herein is specifically: the spiral channel 2 is a channel spirally rising along the circumferential direction, but the cross section of the spiral channel 2 is not in a regular circle, so that the distances from each point of the inner wall to the axis are different in the same cross section of the spiral channel 2. After the liquid flow enters the spiral channel 2, a part of the liquid flow enters the fluid flow distribution cavity 3 along the inlet flow velocity direction, and a part of the liquid flow flows along the inner wall of the spiral channel 2 under the centrifugal action of the spiral structure, because the spiral channel 2 is in the same plane, the distances from each point of the inner wall to the axis are different, the direction and the magnitude of the centrifugal force change along with the structure of the spiral channel 2, the liquid flow is gradually separated in the flowing process, and then the liquid flow is uniformly distributed after entering the fluid flow distribution cavity 3.
Further, in one embodiment of the present invention, optionally, the long-chain polymer infusion concentration is 400 mg/L; when the liquid stream is water, the long-chain polymer is polyacrylamide; when the fluid stream is a lubricating oil, the long chain polymer is polybutadiene.
According to the fluid channel structure of the printed circuit board heat exchanger provided by the embodiment of the invention, the spiral channel is arranged, and the long-chain polymer is injected into the liquid flow, so that the liquid flow is uniformly distributed in the fluid channel structure, and the heat exchange effect of the printed circuit board heat exchanger is further improved.
As shown in fig. 1, in one embodiment of the present invention, the printed circuit board heat exchanger further comprises a fluid flow distribution chamber 3. Specifically, the distance between two opposite end faces of the fluid flow distribution chamber 3 is gradually increased after being reduced, and one of the end faces is connected with the spiral channel 2. The fluid flow distribution cavity 3 is constructed into a structure which is symmetrically arranged up and down by taking a central axis as a center, the position of the central axis is connected with the spiral channel 2, and the distance between two end faces, extending upwards, of the fluid flow distribution cavity 3 from the central axis is gradually reduced and then gradually enlarged; the distance between the two end faces of the fluid flow distribution chamber 3 extending downwards is also gradually reduced and then gradually enlarged.
In one embodiment of the invention, the fluid flow distribution chamber 3 comprises an inlet header 4, an outlet header 5 and a chamber body 6. Specifically, the end face of the inlet header 4 connected to the spiral channels 2 is configured as a first one of two opposite end faces of the fluid flow distribution chamber 3 extending in the width direction, the end face of the outlet header 5 is configured as a second one of the two opposite end faces of the fluid flow distribution chamber 3 extending in the width direction, and the other end faces of the inlet header 4 and the outlet header 5 are connected to and communicate with the cavity 6 so that the liquid flow entering through the inlet header 4 can flow along the cavity 6 to the position of the outlet header 5.
Further, the end face of the inlet header 4 is configured in a planar structure, and the end face of the outlet header 5 is configured in a tapered and then divergent structure. That is, the end face of the outlet header 5 is configured in a continuous planar undulating structure. Such as: the sectional shape of the end face of the outlet header 5 is a continuous broken line shape. The zigzag shape is arranged up and down symmetrically by taking the central axis of the fluid flow distribution cavity 3 as the center. Specifically, the zigzag structure extends upward or downward from the position of the central axis, and is a structure gradually contracting toward the inside of the fluid flow distribution chamber 3, and gradually expands toward the outside of the fluid flow distribution chamber 3 after contracting to a certain position.
Further, the end face of the outlet header 5 may be configured in a continuous curved undulating structure. For example, the sectional shape of the end face of the outlet header 5 is a continuous curved shape. The curve shape is arranged up and down symmetrically by taking the central axis of the fluid flow distribution cavity 3 as the center. Specifically, the curved structures extend upward or downward from the position of the central axis, and each structure gradually shrinks toward the inside of the fluid flow distribution chamber 3, and gradually expands toward the outside of the fluid flow distribution chamber 3 after shrinking to a certain position.
The purpose of this is: the liquid flow has large fluid resistance and slow flow speed in the area far away from the outlet position of the outlet header 5, and has small fluid resistance and fast flow speed in the area near the outlet position, so that the area of the flow section of the area far away from the outlet position is reduced, the flow speed of the liquid flow can be increased, and the liquid flow can rapidly flow out of the outlet header 5 under the action of the negative pressure of the outlet.
In one embodiment of the invention, as shown in fig. 1, the fluid channel structure of the printed circuit board heat exchanger further comprises a plurality of sets of flow channels 7. Specifically, a plurality of sets of flow channels 7 are arranged in parallel in the width direction of the fluid passage structure, and each set of flow channels 7 communicates with the inlet header 4 and the outlet header 5, so that the liquid flow passing through the inlet header 4 can uniformly enter the flow channels 7 and finally flow to the position of the outlet header 5.
As shown in fig. 1, in one embodiment of the present invention, the fluid passage structure of the printed circuit board heat exchanger further includes a fluid outlet tube 8, and specifically, one end of the fluid outlet tube 8 is connected to the outlet header 5.
The working principle of the fluid channel structure of the printed circuit board heat exchanger according to the embodiment of the present invention will be described in detail below by taking the embodiment shown in fig. 1 as an example.
After the liquid flow enters the fluid inlet pipe 1, the soluble long-chain polymer is injected into the fluid inlet pipe 1 through the polymer injection port 9, after the long-chain polymer solution enters the spiral channel 2, the liquid flow entering the fluid flow distribution cavity 3 has certain centrifugal force under the action of a vortex effect, the liquid flow entering the inlet header 4 can quickly flow to a region far away from the inlet position of the inlet header 4 under the action of the centrifugal force because the polymer solution has long-chain characteristics, meanwhile, the liquid flow can quickly flow to the position of the outlet header 5 along the flow channel 7 because the polymer solution has good flowing performance, and the liquid flow can quickly flow out from the fluid outlet pipe 8 after flowing through the outlet header 5 under the structural action of the gradual reduction and gradual expansion of the outlet header 5 and under the action of negative pressure of an outlet.
In another aspect, an embodiment of the present invention further provides a printed circuit board heat exchanger, including a fluid channel structure of the printed circuit board heat exchanger. According to the printed circuit board heat exchanger provided by the embodiment of the invention, the spiral channel is arranged in the fluid channel structure, and the soluble long-chain polymer is injected into the fluid inlet pipe, so that the liquid flow is uniformly distributed in the fluid channel structure and rapidly flows out, and the heat exchange effect of the printed circuit board heat exchanger is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The fluid channel structure of the printed circuit board heat exchanger is characterized by comprising an inlet part, wherein the inlet part comprises a fluid inlet pipe and a spiral channel, the fluid inlet pipe is connected with the spiral channel, and a polymer injection port for injecting soluble long-chain polymer into the fluid inlet pipe is formed in the fluid inlet pipe.
2. The fluid channel structure of a printed circuit board heat exchanger according to claim 1, further comprising a fluid flow distribution chamber having two opposite end surfaces extending in a width direction of the fluid channel structure, wherein a distance between the two opposite end surfaces is tapered and then gradually expanded in the width direction from the spiral channel, and a first end surface of the two opposite end surfaces is connected to the spiral channel.
3. The fluid passage structure of a printed circuit board heat exchanger according to claim 2, wherein the fluid flow distribution chamber includes an inlet header, and an end face of the inlet header connected to the spiral passage is configured as a first end face of two opposite end faces of the fluid flow distribution chamber extending in a width direction.
4. The fluid passage structure of a printed circuit board heat exchanger according to claim 3, wherein the fluid flow distribution chamber further comprises an outlet header, an end face of which is configured as a second end face of two opposite end faces of the fluid flow distribution chamber extending in the width direction.
5. The fluid passage structure of a printed circuit board heat exchanger according to claim 4, wherein the end face of the inlet header is configured in a planar structure, and the end face of the outlet header is configured in a tapered and then diverging structure.
6. The fluid passage structure of a printed circuit board heat exchanger according to claim 5, wherein the end face of the outlet header is configured in a continuous planar undulation structure or a continuous curved undulation structure.
7. The fluid passage structure of a printed circuit board heat exchanger according to claim 4, wherein the fluid flow distribution chamber further comprises a chamber body, both ends of which communicate with the inlet header and the outlet header, respectively.
8. The fluid channel structure of a printed circuit board heat exchanger according to claim 7, further comprising a plurality of sets of flow channels disposed in the cavity, the plurality of sets of flow channels being disposed in parallel along a width direction of the fluid channel structure, and the inlet header and the outlet header being in communication with the flow channels, respectively.
9. The fluid passage structure of a printed circuit board heat exchanger according to claim 4, further comprising a fluid outlet pipe having one end connected to an end face of the outlet header.
10. A printed circuit board heat exchanger, characterized in that it comprises a fluid channel structure of a printed circuit board heat exchanger according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010712192.4A CN111928687B (en) | 2020-07-22 | 2020-07-22 | Fluid channel structure of printed circuit board heat exchanger and printed circuit board heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010712192.4A CN111928687B (en) | 2020-07-22 | 2020-07-22 | Fluid channel structure of printed circuit board heat exchanger and printed circuit board heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN111928687A true CN111928687A (en) | 2020-11-13 |
| CN111928687B CN111928687B (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010712192.4A Active CN111928687B (en) | 2020-07-22 | 2020-07-22 | Fluid channel structure of printed circuit board heat exchanger and printed circuit board heat exchanger |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1596894A (en) * | 1978-04-17 | 1981-09-03 | Olin Corp | Tubular heat exchange panel |
| JPS61252498A (en) * | 1985-05-02 | 1986-11-10 | Takao Sakamoto | Method of cleaning inner surface of heat transfer pipe in heat exchanger |
| CN2322095Y (en) * | 1997-12-30 | 1999-06-02 | 陈慧明 | Reinforced heat conducting pipe for lithium bromide refrigerator |
| CN105043144A (en) * | 2015-06-12 | 2015-11-11 | 西安交通大学 | Double-side etching high-temperature and high-pressure printed circuit board heat exchanger |
| CN106839833A (en) * | 2017-03-09 | 2017-06-13 | 中国科学院上海高等研究院 | A kind of printed circuit board fused salt gas heat exchanger |
| CN109969370A (en) * | 2019-04-03 | 2019-07-05 | 中国船舶重工集团公司第七一九研究所 | The control method and system of oil cooler cooling water excitation heat exchange tube vibration |
| CN209945084U (en) * | 2019-03-11 | 2020-01-14 | 江苏欧迈格板式换热器制造有限公司 | Improved plate type heat exchanger |
| CN111256095A (en) * | 2020-01-14 | 2020-06-09 | 西安交通大学 | A manufacturing method of a printed circuit board type steam generator and a steam generator manufactured by the method |
| CN210892263U (en) * | 2019-09-01 | 2020-06-30 | 浙江凯迪环境科技有限公司 | Efficient energy-saving refrigerant distribution device for heat exchanger |
-
2020
- 2020-07-22 CN CN202010712192.4A patent/CN111928687B/en active Active
Patent Citations (9)
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|---|---|---|---|---|
| GB1596894A (en) * | 1978-04-17 | 1981-09-03 | Olin Corp | Tubular heat exchange panel |
| JPS61252498A (en) * | 1985-05-02 | 1986-11-10 | Takao Sakamoto | Method of cleaning inner surface of heat transfer pipe in heat exchanger |
| CN2322095Y (en) * | 1997-12-30 | 1999-06-02 | 陈慧明 | Reinforced heat conducting pipe for lithium bromide refrigerator |
| CN105043144A (en) * | 2015-06-12 | 2015-11-11 | 西安交通大学 | Double-side etching high-temperature and high-pressure printed circuit board heat exchanger |
| CN106839833A (en) * | 2017-03-09 | 2017-06-13 | 中国科学院上海高等研究院 | A kind of printed circuit board fused salt gas heat exchanger |
| CN209945084U (en) * | 2019-03-11 | 2020-01-14 | 江苏欧迈格板式换热器制造有限公司 | Improved plate type heat exchanger |
| CN109969370A (en) * | 2019-04-03 | 2019-07-05 | 中国船舶重工集团公司第七一九研究所 | The control method and system of oil cooler cooling water excitation heat exchange tube vibration |
| CN210892263U (en) * | 2019-09-01 | 2020-06-30 | 浙江凯迪环境科技有限公司 | Efficient energy-saving refrigerant distribution device for heat exchanger |
| CN111256095A (en) * | 2020-01-14 | 2020-06-09 | 西安交通大学 | A manufacturing method of a printed circuit board type steam generator and a steam generator manufactured by the method |
Non-Patent Citations (1)
| Title |
|---|
| 于兴敏: "《新型干法水泥实用技术全书 上》", 31 August 2006, 中国建材工业出版社, pages: 196 * |
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| CN111928687B (en) | 2023-07-21 |
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