CN212778809U - Tube-plate composite micro-channel heat exchanger - Google Patents
Tube-plate composite micro-channel heat exchanger Download PDFInfo
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- CN212778809U CN212778809U CN202021719518.8U CN202021719518U CN212778809U CN 212778809 U CN212778809 U CN 212778809U CN 202021719518 U CN202021719518 U CN 202021719518U CN 212778809 U CN212778809 U CN 212778809U
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Abstract
The utility model provides a compound microchannel heat exchanger of tube sheet belongs to heat transfer technical field. The tube-sheet composite microchannel heat exchanger comprises: the heat exchanger comprises a plurality of clapboards arranged at intervals in parallel, a group of heat exchange channels are arranged between every two adjacent clapboards, each group of heat exchange channels comprises a plurality of pipelines arranged at intervals in the first direction in parallel, a channel is formed between every two adjacent pipelines, and the channels and the pipelines are respectively used for introducing cold sources or heat sources simultaneously. This application has replaced the material mode of going that adopts conventional machining or chemical etching among the prior art to form the microchannel heat exchanger through the mode of a plurality of baffles and the direct assembly welding of pipeline, has greatly reduced the processing cost, has simplified production processes, has shortened production cycle.
Description
Technical Field
The utility model relates to a heat exchange technology field particularly, relates to a tube sheet composite microchannel heat exchanger.
Background
The microchannel heat exchanger is a brand new heat exchange structure different from the traditional shell-and-tube heat exchanger, has the characteristics of large heat exchange area per unit volume, high heat exchange efficiency (up to 98%), pressure reduction and the like, has obvious advantages in the capabilities of bearing pressure, resisting temperature and the like (high temperature resistance of 700 ℃ and high temperature resistance of 100MPa), and has wide application prospects in the fields of nuclear power, thermal power, offshore oil and gas exploitation, chemical reactions, industrial gas treatment and the like.
In the prior art, the flow channel of the micro-channel heat exchanger needs to be machined on the metal plate by adopting a material removing mode such as chemical etching or machining, and the like, and then the flow channel plate and the partition plate are assembled and welded into an integrated structure, so that the defects of high raw material cost, complex process, high machining cost, long production period and the like exist, and the micro-channel heat exchanger is not beneficial to industrialization, low-cost mass production and application.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a tube sheet composite microchannel heat exchanger for solve the technical problem that the process is complicated among the prior art, the processing cost is high and the production cycle is long.
The embodiment of the utility model is realized like this:
the embodiment of the utility model provides a compound microchannel heat exchanger of tube sheet, include: the heat exchanger comprises a plurality of clapboards arranged at intervals in parallel, a group of heat exchange channels are arranged between every two adjacent clapboards, each group of heat exchange channels comprises a plurality of pipelines arranged at intervals in the first direction in parallel, a channel is formed between every two adjacent pipelines, and the channels and the pipelines are respectively used for introducing cold sources or heat sources simultaneously.
Optionally, the cross-section of the conduit is rectangular, circular or elliptical.
Optionally, the inlet and outlet of the duct are located on opposite sides of the partition.
Optionally, the cross-section of the conduit is linear, zigzag or wavy.
Optionally, the inlet and outlet of the duct are located on adjacent sides of the partition respectively.
Optionally, the section of the pipe is L-shaped, or the section of the pipe is circular arc-shaped.
Optionally, the wall thickness of the pipe is in the range of 0.1-10 mm.
Optionally, the width of the orifice of the conduit is 0.3-30 mm.
Optionally, the tubes forming the group of heat exchange channels are welded and fixed to the partition plate.
Optionally, the thickness of the separator is 0.1-1000 mm.
Optionally, the partition plate, the first side plate, the second side plate and the pipe are all made of metal.
The utility model discloses beneficial effect includes:
the embodiment of the utility model provides a pair of compound formula microchannel heat exchanger of tube sheet, including a plurality of baffles that parallel interval set up, form a set of heat transfer passageway between two adjacent baffles, it is more to set up the baffle, and the heat transfer passageway of formation is more, and the heat transfer effect is better. The group of heat exchange channels comprise a plurality of pipelines which are arranged in parallel at intervals along a first direction, a channel is formed between every two adjacent pipelines, and the channels and the pipelines which are arranged alternately are formed and are respectively used for introducing a cold source or a heat source at the same time. The cold source and the heat source are alternately arranged in the adjacent groups of heat exchange channels, the fluid channel structure is formed by directly assembling and welding a plurality of clapboards and pipelines, and the micro-channel structure is not formed in a material removing mode such as chemical etching or machining, so that the production process is simplified, the raw material cost and the processing cost are greatly reduced, and the production period is shortened. Meanwhile, the geometric dimensions of the partition plate and the pipeline can be flexibly designed according to actual engineering requirements, so that the engineering application range is wide.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a tube-plate composite microchannel heat exchanger according to an embodiment of the present invention;
fig. 2 is a schematic view of a tube-plate composite micro-channel heat exchanger with a rectangular tube section according to an embodiment of the present invention;
fig. 3 is a schematic view of a tube-plate composite micro-channel heat exchanger with an oval cross-section provided in an embodiment of the present invention;
fig. 4 is a schematic view of a pipe according to an embodiment of the present invention, which has a straight cut surface;
fig. 5 is a schematic view of a pipeline provided by an embodiment of the present invention, which has a zigzag section;
fig. 6 is a schematic view of a pipe according to an embodiment of the present invention, which has a sawtooth-shaped section;
fig. 7 is a schematic diagram of a pipeline provided by an embodiment of the present invention, which has a wavy section;
fig. 8 is a schematic view of a pipeline according to an embodiment of the present invention, which has an L-shaped section.
Icon: 100-tube plate composite micro-channel heat exchanger; 110-a separator; 120-heat exchange channels; 121-a pipeline; 122-channel; 131-a first side panel; 132-second side panel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: the terms "central," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the description and are used in a generic and descriptive sense only and not for purposes of limitation, the term "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like. The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "disposed," "mounted," "connected," and "connected" are to be construed broadly. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The micro-channel heat exchanger is a novel heat exchange structure, has the unique technical advantages of small volume, light weight, high temperature resistance, high pressure resistance, high heat exchange efficiency and the like, and has wide application prospect in the fields of nuclear power, thermal power, offshore oil and gas exploitation, chemical reaction, industrial gas treatment and the like. In the prior art, the flow channel in the microchannel heat exchanger is usually processed by adopting a material removing mode such as chemical etching processing or machining, but the defects of high raw material cost, complex process, high processing cost, long production period and the like exist, and the method is not beneficial to industrialization, low-cost mass production and application of the microchannel heat exchanger.
The present application has been made to overcome the above-mentioned disadvantages of the prior art, and the following are embodiments of the present application.
Fig. 1 is the structural schematic diagram of the tube-plate composite microchannel heat exchanger 100 provided by the present invention, please refer to fig. 1, an embodiment of the present invention provides a tube-plate composite microchannel heat exchanger 100, including: the heat exchanger comprises a plurality of baffles 110 arranged in parallel at intervals, a group of heat exchange channels 120 are arranged between every two adjacent baffles 110, each group of heat exchange channels 120 comprises a plurality of pipelines 121 arranged in parallel at intervals along a first direction, a channel 122 is formed between every two adjacent pipelines 121, and the channels 122 and the pipelines 121 are respectively used for introducing a cold source or a heat source at the same time.
Wherein the first direction is perpendicular to the flow direction of the fluid in the set of heat exchange channels 120, i.e. the first direction is perpendicular to the extension direction of the tubes 121.
The group of heat exchange channels 120 includes a plurality of tubes 121 arranged in parallel at intervals in the first direction, and a channel 122 is arranged between two adjacent tubes 121, that is, the channel 122 and the tube 121 are alternately arranged in a direction perpendicular to a flow direction of fluid in the heat exchange tube 121, for example, the tube 121 is a metal tube, and a heat source region or a heat sink region is simultaneously formed inside and outside the metal tube, that is, the heat sink and the heat source are alternately arranged in the adjacent group of heat exchange channels 120, thereby effectively improving heat exchange efficiency.
Illustratively, in a group of heat exchange channels 120, three tubes 121 are arranged in parallel at intervals along a fluid flow direction, a space between a first side plate 131 and the first tube 121 is a first channel 122, a space between the first tube 121 and the second tube 121 is a second channel 122, a space between the second tube 121 and the third tube 121 is a third channel 122, and a space between the third channel 122 and the second side plate is a fourth channel 122, so that the channels 122 are arranged outside the tubes 121, and the heat exchange channels are formed through a simple process and a low-cost manner.
The above is only an example, and the arrangement of the pipes 121 and the number of the pipes 121 in the group of heat exchange channels 120 are not limited, and a person skilled in the art may specifically set the number and the arrangement of the pipes 121 according to actual needs as long as the flow requirement of the heat exchanger can be met.
The outer walls of the tubes 121 in one set of heat exchange channels 120 are connected with the partition plates 110 by diffusion welding or brazing to form an integral structure, so that the good pressure-bearing performance of the fluid channel is ensured, for example, the number of the tubes 121 in one set of heat exchange channels 120 is two, the space formed by the outer wall of the first tube 121, the first side plate 131 and the partition plates 110 is the channel 122, and the size of the space is not changed, so that a certain number of tubes 121 need to be arranged and fixed in one set of heat exchange channels 120 to form a micro-channel structure with high heat exchange efficiency, and therefore, the outer walls of the tubes 121 are respectively connected with two adjacent partition plates 110 by diffusion welding or brazing to ensure the pressure-bearing capacity of the micro. Similarly, the space formed between the first and second tubes 121 and between the first and second tubes and the partition 110, respectively, is the second passage 122, and the space formed between the second tube 121 and the second side plate 132 and the partition 110 is the third passage 122.
It should be noted that the cross section of the pipe 121 and the path of the pipe 121 along the fluid flow direction are not limited, as long as the heat exchange effect can be achieved.
Optionally, referring to fig. 1, a first side plate 131 and a second side plate 132 are disposed at two opposite side edges of the group of heat exchange channels 120, a space enclosed by the first side plate 131, the two adjacent partition plates 110 and the tubes 121 is also a channel 122, and similarly, a space enclosed by the second side plate 132, the two adjacent partition plates 110 and the tubes 121 is also a channel 122.
It should be noted that, there are various arrangement manners of the first side plate 131 and the second side plate 132, for example, the first side plate 131 and the second side plate 132 are arranged in parallel, and the first side plate 131 and the second side plate 132 are perpendicular to the partition plate 110, or the first side plate 131 and the second side plate 132 are arranged in parallel, and the first side plate 131 and the second side plate 132 have an included angle with the partition plate 110, but the included angle is not equal to 90 °, or the first side plate 131 and the second side plate 132 are not parallel, and the first side plate 131 and the second side plate 132 have an included angle with the partition plate 110.
The first side plate 131 and the second side plate 132 are respectively fixedly connected to the partition 110, and there are various ways of achieving the above-mentioned fixed connection relationship, for example, diffusion welding, brazing, etc., so that the first side plate 131, the second side plate 132 and the partition 110 form an integral body.
The partition plates 110 include a plurality of partition plates 110, a group of heat exchange channels 120 is formed between two adjacent partition plates 110, the heat exchange channels 120 include a plurality of groups, the larger the number of the groups of the heat exchange channels 120 is, the better the heat exchange effect of the heat exchanger structure is, correspondingly, the greater the height of the tube-plate composite microchannel heat exchanger 100 is, of course, the height of the tube-plate composite microchannel heat exchanger 100 referred to herein is relative, not absolute, for example, the diameter of the tube 121 also affects the height of one group of the heat exchange channels 120. The heat exchange channels 120 between adjacent groups may be the same or different, the heat exchange channels 120 between adjacent groups being the same means that the widths, the number of tubes 121, the diameters of the tubes 121, etc. of the heat exchange channels 120 between adjacent groups are the same, and the heat exchange channels 120 between adjacent groups being different means that the widths, the number of tubes 121, the diameters of the tubes 121, etc. of the heat exchange channels 120 between adjacent groups are different.
The number of the tubes 121 in each group of heat exchange channels 120 is not limited, the wider the group of heat exchange channels 120 is, the smaller the diameter of the tubes 121 is, the more the number of the tubes 121 are correspondingly arranged, the better the heat exchange effect is, and the technical personnel in the field can set the heat exchange effect according to specific situations.
The embodiment of the utility model provides a pair of compound formula microchannel heat exchanger 100 of tube sheet, including a plurality of baffles 110 that parallel interval set up, form a set of heat transfer passageway 120 between two adjacent baffles 110, it is more to set up baffle 110, and the heat transfer passageway 120 group number that forms is more, and the heat transfer effect is better. The group of heat exchange channels 120 includes a plurality of tubes 121 arranged in parallel at intervals in the first direction, a channel 122 is formed between two adjacent tubes 121, the channels 122 and the tubes 121 arranged alternately are formed, the channels 122 and the tubes 121 are respectively used for introducing a cold source or a heat source, and the tubes 121 and the channels 122 arranged alternately can effectively improve the heat exchange effect. The wall thicknesses of the plurality of partition plates 110 and the pipelines 121 can be correspondingly designed according to actual needs, so that the application range is wide, the pipelines 121 are arranged between two adjacent partition plates 110 at intervals in parallel, the channels 122 are formed between two adjacent pipelines 121, the assembly relation is simple, the microchannel structure leading into a heat source or a cold source is not required to be manufactured in a material passing mode, and the production cost is greatly reduced.
Alternatively, referring to fig. 2 and 3 in combination, the cross-section of the pipe 121 is rectangular, circular or elliptical.
Referring to fig. 1 and 2 in combination, when the cross section of the duct 121 is rectangular, there are two cases, the first is that the length and width of the rectangle are the same, and the second is that the length and width of the rectangle are different. When the length and the width of the rectangle are the same, the cross section of the pipe 121 is square, the outer walls of two opposite sides of the square are respectively fixedly connected with the partition plate 110, the channel 122 is formed by the first side plate 131, one outer wall of two opposite sides of the square pipe 121 and the partition plate 110, or the channel 122 is formed by the first side plate 131, one outer wall of two opposite sides of the square and the partition plate 110 in a surrounding manner, or the channel 122 is a space formed by the first side plate 131, one outer wall of two opposite sides of the square pipe 121 and the partition plate 110 in a surrounding manner, the larger the distance between the adjacent square pipes 121 is, the larger the width of the pipe 121 of the channel 122 is considered, and the smaller the.
Similarly, when the length and width of the rectangle are different, the width of one set of heat exchange channels 120 can be adjusted by setting the placement position of the tubes 121 with rectangular cross section. The other arrangements are the same as those of the square-section pipes 121 and will not be described in detail herein.
When the cross section of the pipe 121 is circular, the outer wall of the pipe 121 with circular cross section is tangent to and fixedly connected with the partition 110, and a channel 122 is formed between the adjacent pipes 121 with circular cross section.
Referring to fig. 1 and 3 in combination, when the cross section of the tube 121 is an ellipse, the tube 121 with an elliptical cross section is arranged in a manner that can affect the width of one set of heat exchange channels 120, for example, the major axis direction of the tube 121 with an elliptical cross section is the same as the width direction of one set of heat exchange channels 120, that is, the width of one set of heat exchange channels 120 depends on the major axis of the ellipse, and similarly, the minor axis direction of the tube 121 with an elliptical cross section is the same as the width direction of one set of heat exchange channels 120, that is, the width of one set of heat exchange channels 120 depends on the minor axis of.
Alternatively, referring to fig. 4-7 in combination, the inlet and outlet of the conduit 121 are located on opposite sides of the baffle 110.
A passage 122 is formed between adjacent two tubes 121, and thus, an inlet and an outlet of the passage 122 are also located at opposite sides of the partition 110, respectively.
Alternatively, the cross-section of the conduit 121 may be straight, zigzag, or wavy.
Referring to fig. 4, the section of the pipe 121 is linear, the linear pipe 121 is disposed between two adjacent partitions 110 in parallel, when the section of the pipe 121 is linear, the section of the channel 122 is also linear, and the sections of the channel 122 and the pipe 121 are staggered.
Referring to fig. 5, the cross section of the pipe 121 is zigzag, and in order to ensure a sufficient effective heat exchange length, the opening direction of the zigzag pipe 121 is generally set to be the same as the width of the heat exchange pipe 121, and the opening direction of the zigzag pipe 121 means the opening of the zigzag pipe 121 faces.
Referring to fig. 6, the cross-section of the pipes 121 is zigzag, the zigzag pipes 121 are arranged in parallel, and the cross-section of the channel 122 between adjacent pipes 121 is also zigzag.
Referring to fig. 7, the cut surfaces of the pipes 121 are wavy, the wavy pipes 121 are arranged in parallel, and the cut surfaces of the passages 122 between the adjacent pipes 121 are also wavy.
The skilled person can correspondingly select a suitable section of the pipe 121 according to the actual situation.
Alternatively, referring to FIG. 8, the inlet and outlet of the conduit 121 are located on adjacent sides of the baffle 110.
It should be noted that the inlet and the outlet of the pipe 121 are respectively located at the adjacent sides of the partition plate 110, the adjacent sides of the partition plate 110 are not limited, and any adjacent sides of the partition plate 110 may be.
Optionally, the section of the pipe 121 is L-shaped, or the section of the pipe 121 is circular arc-shaped.
As can be seen from the above, the inlet and the outlet of the pipe 121 are respectively disposed at the adjacent sides of the partition plate 110, please refer to fig. 8, fig. 8 is a scheme in which the inlet and the outlet of the pipe 121 are respectively disposed at the adjacent sides of the partition plate 110, wherein the included angle of the L-shaped pipe 121 is not particularly limited, for example, the included angle of the L-shaped pipe 121 is a right angle, or the included angle of the L-shaped pipe 121 is an obtuse angle, as long as it is achieved that the opening and the outlet of the pipe 121 are respectively disposed at the adjacent sides of the partition plate 110.
Another alternative for the inlet and outlet of the conduit 121 to be located on adjacent sides of the partition 110 is to have the cross-section of the conduit 121 in the shape of a circular arc, where the angle of the circular arc and the arc length of the circular arc are not limited.
As can be seen from the above, the first direction is perpendicular to the extending direction of the duct 121, i.e., perpendicular to the first direction, i.e., the extending direction of the duct 121.
Optionally, the wall thickness of the pipe 121 in this embodiment ranges from 0.1mm to 10 mm.
The wall thickness range in the tube plate composite type micro-channel heat exchanger 100 in the embodiment is 0.1mm to 10mm, and in practical application, the wall thickness range is reasonably selected according to the temperature and pressure working conditions of the heat exchanger.
In the prior art, the flow channel of the micro-channel heat exchanger needs to be machined on the metal plate by adopting a material removing mode such as chemical etching or machining, and the like, and then the flow channel plate and the partition plate are assembled and welded into an integrated structure, so that the defects of high raw material cost, complex process, high machining cost, long production period and the like exist, and the micro-channel heat exchanger is not beneficial to industrialization, low-cost mass production and application. The material removing process is omitted in the embodiment, a plurality of fluid micro-channels can be formed directly through the interval arrangement of the pipelines 121, the production process is simplified, and the production cost is greatly reduced.
Optionally, the width of the orifice of the pipe 121 in this embodiment is 0.3-30 mm.
In addition, the width range of the wide opening of the tube 121 in the tube sheet composite type microchannel heat exchanger 100 in the embodiment is between 0.1mm and 10mm, that is, the tube sheet composite type microchannel heat exchanger 100 can be manufactured in a plurality of specifications, and in practical application, the width is reasonably selected according to the heat exchange working condition of the heat exchanger.
Optionally, the tubes 121 forming the set of heat exchange channels 120 are welded and fixed to the separator 110.
Here, the specific form of the welding fixation is not limited, and may be, for example, brazing or diffusion welding. The pipes 121 are welded between the adjacent separators 110 by welding, and the heat exchange microchannel structure is not formed by the existing material removing technology, so that the production cost is greatly reduced.
Optionally, the thickness of the spacer 110 is 0.1-1000 mm.
In the tube sheet composite type microchannel heat exchanger 100 in the embodiment, the thickness ranges of the first side plate 131, the second side plate 132 and the partition plate 110 are 0.1-1000mm, and a person skilled in the art can specifically select a proper thickness value according to an actual heat exchange working condition to ensure the pressure resistance of the heat exchanger.
Optionally, in this embodiment, the partition plate 110, the first side plate 131, the second side plate 132, and the pipe 121 are all made of metal, and specifically, the metal materials of the partition plate 110, the first side plate 131, the second side plate 132, and the pipe 121 are carbon fiber reinforced metal matrix composite materials. The carbon fiber reinforced metal matrix composite material is formed by sintering metal powder and carbon fibers into a metal laminate by vacuum hot pressing, and optionally, most of metal matrix is aluminum alloy, aluminum-magnesium alloy, titanium alloy, high-temperature alloy and the like, so that the strength and the heat conduction performance of the metal laminate can be effectively improved, and the tube plate composite type microchannel heat exchanger 100 can obtain higher heat exchange performance and pressure resistance.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A tube-plate composite microchannel heat exchanger, comprising: the heat exchanger comprises a plurality of clapboards arranged in parallel at intervals, wherein a group of heat exchange channels are arranged between the two adjacent clapboards and comprise a plurality of pipelines arranged in parallel at intervals along a first direction, a channel is formed between the two adjacent pipelines, and the channel and the pipelines are respectively used for introducing a cold source or a heat source at the same time.
2. The tube-sheet composite microchannel heat exchanger of claim 1, wherein the tubes are rectangular, circular, or oval in cross-section.
3. The tube-sheet composite microchannel heat exchanger of claim 1, wherein the inlet and outlet of the tubes are located on opposite sides of the partition, respectively.
4. The tube-sheet composite microchannel heat exchanger of claim 3, wherein the cross-section of the tubes is straight, zigzag, or wavy.
5. The tube-sheet composite microchannel heat exchanger of claim 1, wherein the inlet and outlet of the tube are located on adjacent sides of the partition, respectively.
6. The tube-sheet composite microchannel heat exchanger of claim 5, wherein the tube has an L-shaped cross section or a circular arc cross section.
7. The tube-sheet composite microchannel heat exchanger of claim 3, wherein the tubes have a wall thickness in the range of 0.1mm to 10 mm.
8. The tube-sheet composite microchannel heat exchanger of claim 3, wherein the tubes have a tube orifice width of 0.3 mm to 30 mm.
9. The tube-sheet composite microchannel heat exchanger of claim 1, wherein the tubes forming a set of the heat exchange channels are welded to the baffles.
10. The tube-sheet composite microchannel heat exchanger of claim 1, wherein the baffles and the tubes are both of a metal material.
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| CN202021719518.8U CN212778809U (en) | 2020-08-17 | 2020-08-17 | Tube-plate composite micro-channel heat exchanger |
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| CN202021719518.8U CN212778809U (en) | 2020-08-17 | 2020-08-17 | Tube-plate composite micro-channel heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216293A (en) * | 2021-11-12 | 2022-03-22 | 中车石家庄车辆有限公司 | Phase-change cold storage type cold supply device and refrigerator wagon box |
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- 2020-08-17 CN CN202021719518.8U patent/CN212778809U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216293A (en) * | 2021-11-12 | 2022-03-22 | 中车石家庄车辆有限公司 | Phase-change cold storage type cold supply device and refrigerator wagon box |
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