CN113043622A - Process for manufacturing integrated heat exchange plate with zigzag flow passage - Google Patents

Process for manufacturing integrated heat exchange plate with zigzag flow passage Download PDF

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Publication number
CN113043622A
CN113043622A CN202110301692.3A CN202110301692A CN113043622A CN 113043622 A CN113043622 A CN 113043622A CN 202110301692 A CN202110301692 A CN 202110301692A CN 113043622 A CN113043622 A CN 113043622A
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China
Prior art keywords
flow channel
heat exchange
exchange plate
plate
manufacturing
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Pending
Application number
CN202110301692.3A
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Chinese (zh)
Inventor
吴威
汤建文
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First Environmental Protection Shenzhen Co ltd
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First Environmental Protection Shenzhen Co ltd
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Application filed by First Environmental Protection Shenzhen Co ltd filed Critical First Environmental Protection Shenzhen Co ltd
Priority to CN202110301692.3A priority Critical patent/CN113043622A/en
Priority to CN202110312118.8A priority patent/CN113091492A/en
Publication of CN113043622A publication Critical patent/CN113043622A/en
Pending legal-status Critical Current

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    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/18—Heating or cooling the filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/681—Component parts, details or accessories; Auxiliary operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • 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
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention relates to the field of heat exchange, in particular to a process method for manufacturing an integral type zigzag flow channel heat exchange plate. The processing steps are as follows: the method comprises the following steps that firstly, a prefabricated mould comprises a lower forming mould, an upper forming mould, a supporting plate, a tortuous flow channel pipe and a supporting column, wherein a buckle is arranged on the supporting plate, and the lower forming mould and the upper forming mould both comprise the forming shape of one side of the integrated tortuous flow channel heat exchange plate; secondly, placing a support column in the lower forming die, installing a support plate above the support column, installing a bent flow channel pipe on the support plate, and fastening the bent flow channel pipe by using a buckle arranged on the bent flow channel pipe; thirdly, laying a required amount of resin composite material into a lower molding die; fourthly, covering the upper forming die onto the lower forming die; fifthly, applying pressure on the upper forming die, heating the resin composite material and keeping the temperature for a period of time; and sixthly, stopping heating, keeping the pressure to normal temperature, and then demoulding.

Description

Process for manufacturing integrated heat exchange plate with zigzag flow passage
Technical Field
The invention relates to the field of heat exchange, in particular to a process method for manufacturing an integral type zigzag flow channel heat exchange plate.
Background
Heat exchange is the process of heat transfer between two objects or parts of the same object due to temperature differences. Heat exchange is generally accomplished by three means, heat conduction, heat convection, and heat radiation. Heat exchangers are devices used to transfer heat from a hot fluid to a cold fluid to meet specified process requirements, and are an industrial application of convective and conductive heat transfer. The heat exchange plate is a simple heat exchange device, mainly performs heat energy exchange in a heat conduction mode, is in a plate structure in appearance, and takes liquid (such as water, oil or other liquid substances) as a heat exchange medium in the middle to transfer heat from hot fluid to cold fluid or take away the heat of the hot fluid by the cold fluid. I.e. it can heat the object or environment and also cool it. For example, when the temperature-reducing water-saving device is used on the floor of a room, the temperature in the room can be reduced by introducing relatively cold water in summer, and conversely, the temperature in the room can be increased by introducing relatively hot water in winter. The heat exchange plate is used as a heating plate of a filter press, and a filter cake can be heated and dried as long as hot water is introduced into the heat exchange plate.
Disclosure of Invention
In view of this, there is a need for an integrated serpentine flow path heat exchanger plate. The mould is moulded into an integral plate-shaped structure, a bent flow passage pipe is arranged in the middle of the plate body, and a liquid inlet and a liquid outlet are respectively arranged at two ends of the bent flow passage pipe. The bent flow passage pipe is made of metal materials and is embedded into the plate body in the whole heat exchange plate molding process to be fused into a whole, and the heat exchange plate has good leakage-proof and anti-extrusion effects, simple structure, electric energy saving and long service life.
The curved deflection pipeline is formed by connecting a straight section and an arc section. The straight section and the arc section are smoothly connected into an integral pipeline, so that the retention time of liquid flowing through the heating plate is longer, and the full heat exchange is facilitated.
Further, the distribution shape of the zigzag flow channel pipe corresponds to the overall outer contour shape of the heat exchange plate. That is, the distribution area and the shape of the arrangement are determined according to the outer contour of the heat exchange plate, if the outer contour is square, the distribution of the zigzag flow channels is also close to the square; if the outer contour is circular, the distribution of the tortuous flow paths also approaches a circle.
Further, the cross section of the zigzag flow channel pipe is circular. Alternatives may also be oval or other shapes.
Further, the liquid inlet and the liquid outlet are both provided with threads to connect with an external pipeline. In order to be connected with the outside, the outer wall or the inner wall of the port of the liquid inlet and the port of the liquid outlet are provided with threads. The liquid inlet and the liquid outlet can extend out of the plate body of the heat exchange plate or can be hidden in the plate body, and the plate body can be additionally provided with a connector.
Further, the overall shape of the zigzag flow channel heat exchange plate is square or circular. Other polygonal shapes are also possible in the alternative.
Furthermore, the material of the heat exchange plate with the zigzag flow passage is a resin composite material, and the material has the advantages of good plasticity, pressure resistance, temperature resistance, secondary forming and the like.
Furthermore, the zigzag flow channel heat exchange plate is used as a heating plate in a filter press, a feed inlet is formed in the center of the zigzag flow channel heat exchange plate, a plate frame is arranged on the periphery of the plate body, filtrate ports are formed in four corners of the plate frame, extrusion salient points are formed in the surface of the plate body in the plate frame, and a filtering chamber is formed in a space formed by the plate frame and the surface of the plate body. In this case, the two sides of the zigzag flow channel heat exchange plate are symmetrical.
The invention discloses a process method for manufacturing an integral type zigzag flow passage heat exchange plate.
The method comprises the following steps that firstly, a prefabricated mold comprises a lower forming mold, an upper forming mold, a prefabricated support plate, a bent flow channel pipe and a support column, wherein a buckle is arranged on the support plate, the lower forming mold comprises a formed shape of one side of an integral bent flow channel heat exchange plate, and the upper forming mold comprises a formed shape of the other side of the integral bent flow channel heat exchange plate; secondly, placing a support column in the lower forming die, installing a support plate above the support column, installing a bent flow channel pipe on the support plate, and fastening the bent flow channel pipe by using a buckle arranged on the bent flow channel pipe; thirdly, laying a required amount of resin composite material into a lower molding die; fourthly, covering the upper forming die onto the lower forming die; fifthly, applying pressure on the upper forming die, heating the resin composite material and keeping the temperature for a period of time; and sixthly, stopping heating, keeping the pressure to normal temperature, and then demoulding. The snap-fit is a fastening means and can be replaced by other means, such as a hole in the support plate and then a wire hole to bind the deflection conduit to the support plate.
Further, the first-step prefabricated supporting plate, the buckles and the supporting columns are made of clinker which is solidified and formed by the same materials for manufacturing the zigzag flow channel heat exchange plate. In order to ensure that the integral bent runner heat exchange plate keeps stronger pressure resistance and constant performance after being manufactured, the accessories are made of the same material as the plate body, and when raw materials (the materials before being solidified at high temperature and high pressure, which are hereinafter referred to as raw materials) of the same material are added into a grinding tool, the raw materials can be well fused and combined together after being solidified.
Further, the bent flow passage pipe in the first step is formed by bending a metal pipe back and forth. The forming of the tortuous flow passage pipe can be realized by directly bending the metal pipeline in a mechanical mode, and can also be realized in a mode of casting forming and the like. Alternatively, the meandering channel may also be in the form of other bends, such as a helical bend.
Further, the material of the meandering flow passage tube in the first step is stainless steel. The substitute material may also be a copper material or other alloy material.
Furthermore, a plurality of support columns are arranged in the lower molding die in the second step and clamped in corresponding grooves in the lower molding die. In addition, the supporting columns can also be fixed on the supporting plate.
Further, the resin composite material in the third step comprises the following components: 76-79% of unsaturated resin, 18-21% of GF special yarn and 2.6-3.0% of curing assistant.
Further, the required amount of material laying in the third step is the thickness of the material after being fully melted and cooled: 85-95 mm.
Further, the material sufficient flowing temperature in the fifth step is as follows: 145-155 ℃.
Further, the time for keeping the constant temperature and pressure in the fifth step is 55-65 minutes.
Drawings
Fig. 1 is a perspective view of an integral zigzag flow channel heat exchange plate of the present invention.
Fig. 2 is an enlarged schematic view of a cube in the B region of fig. 1.
Fig. 3 is a schematic sectional view taken along the line a-a in fig. 1.
Fig. 4 is a schematic view showing the relationship among the positions of the zigzag flow channel tube, the support plate and the support post of the integrated zigzag flow channel heat exchange plate of the present invention disposed on a lower mold (not shown).
Fig. 5 is a perspective view of the tortuous flow passage tube of fig. 4 assembled to a snap on support plate.
Fig. 6 is a reverse perspective view of fig. 5.
Fig. 7 is a process flow diagram for manufacturing an integrated serpentine flow channel heat exchange plate.
The parts in the figure are marked as follows: the device comprises an integrated zigzag flow channel heat exchange plate 10, a plate frame 11, a plate body 12, extrusion salient points 13, a filter chamber 14, a feed inlet 15, stress salient points 16, a filtrate outlet 17, a zigzag flow channel pipe 20, a straight section 20a, an arc section 20b, a liquid inlet 21, a liquid outlet 22, a support plate 30, a buckle 31, a support column 32, a support column trepanning 33 and a material inflow hole 34.
A-A is the section direction of the integral type zigzag flow channel heat exchange plate.
Detailed Description
As shown in fig. 1, an integral zigzag-flow-channel heat exchange plate 10 is molded into an integral plate-shaped structure by a mold, here, taking a heating plate in a filter press as an example, a zigzag-flow channel tube 20 is disposed in the middle of a plate body 12, and both ends of the zigzag-flow channel tube 20 are respectively provided with a liquid inlet 21 and a liquid outlet 22, as shown in a cutaway view of fig. 3.
In the example shown in fig. 3, the curved duct 20 is formed by a straight segment 20a connected to an arc segment 20 b.
In the example, the distribution of the zigzag flow channel tubes 20 is shaped to correspond to the outer contour of the integrated zigzag flow channel heat exchanger plate 10. The outer contour is square, so that the distribution of the meandering channel 20 is tapered to a shape close to a square, see fig. 3.
In the example shown, the cross-section of the tortuous passage 20 is circular, as shown by the exit orifice 22 in FIG. 4.
In one embodiment, the inlet port 21 and the outlet port 22 are threaded to connect to external pipes (not shown).
In the illustrated example, the monolithic serpentine flow channel heat exchanger plate 10 is square or rectangular in shape, as shown in figure 1.
In the illustrated example, the monolithic serpentine flow channel heat exchange plate 10 is circular in shape (not shown).
In the example, the integral serpentine flow channel heat exchange plate 10 is constructed from a resin composite material.
When the integral zigzag flow channel heat exchange plate is used as a heating plate of a filter press, a feed inlet 15 is arranged in the center of the integral zigzag flow channel heat exchange plate 10, a plate frame 11 is arranged on the periphery of the plate body 12, filtrate ports 17 are arranged at four corners of the plate frame 11, extrusion salient points 13 and stress salient points 16 are arranged on the surface of the plate body 12 in the plate frame 11, and a space formed by the plate frame 11 and the surface of the plate body 12 is a filter chamber 14, which is shown.
The two side surfaces of the integral zigzag flow channel heat exchange plate 10 are of symmetrical structures. The two sides of the plate frame are respectively provided with an extrusion salient point 13 and a stress salient point 16, and the space formed by the plate frame 11 and the surface of the plate body 12 is a filter chamber 14.
The process method for manufacturing the integral type zigzag flow channel heat exchange plate 10 comprises the following steps:
referring to fig. 4 to 6 and 7, in a first step, the prefabricated mold includes a lower forming mold, an upper forming mold (not shown), a prefabricated support plate 30, a curved baffle pipe 20, and a support pillar 32, wherein the support plate 30 is provided with a buckle 31, the lower forming mold includes a configuration shape of one side of the integrated curved flow channel heat exchange plate, and the upper forming mold includes a configuration shape of the other side of the integrated curved flow channel heat exchange plate; the configuration of the side surface is different according to the purpose of the heat exchange plate, and the support plate 30 is further provided with a plurality of material inflow holes 34, and when the raw material is heated to become liquid, a part of the liquid can flow into the lower portion of the mold through the material inflow holes 34, and another part of the liquid can flow into the lower portion of the mold through the periphery of the support plate 30, so that the material can more fully fill the whole set of the mold. Secondly, placing a support column 32 in the lower forming die, wherein the upper end of the support column 32 can be sleeved in a support column sleeve hole 33 on the support plate 30 to install the support plate 30, the lower end of the support column 32 can be fixed in a cavity of the lower forming die, and the deflection pipeline 20 is installed above the support plate 30 and fastened by a buckle 31 arranged on the deflection pipeline; thirdly, laying a required amount of resin composite material into a lower molding die; fourthly, covering the upper forming die onto the lower forming die; fifthly, applying pressure on the upper forming die, heating the resin composite material and keeping the temperature for a period of time; and sixthly, stopping heating, keeping the pressure to normal temperature, and then demoulding.
The supporting plate 30, the snap 31 and the supporting columns 32 prefabricated in the first step are made of clinker which is formed by curing the same materials for manufacturing the zigzag flow channel heat exchange plate 10.
The meandering duct 20 in the first step is formed by bending a metal tube back and forth.
In the example, the material of the meandering channel tube 20 in the first step is stainless steel.
In a second step, the support posts 32 are placed in the corresponding recesses in the lower mold. In the example of a filter press heating plate, the support posts 32 may be secured within corresponding recesses in the stress risers 16 of the lower mold to increase stability.
The resin composite material in the third step comprises the following components: 76-79% of unsaturated resin, 18-21% of GF special yarn and 2.6-3.0% of curing assistant.
In the third step, the required quantity of the material laying is the thickness of the material after the material is fully melted: 85-95 mm. The actual production is 89 mm.
The material full flowing temperature in the fifth step is as follows: 145-155 ℃.
The time for keeping the constant temperature and pressure in the fifth step is 55-65 minutes.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, many alternatives and modifications can be made without departing from the spirit of the invention, which falls within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. A process method for manufacturing an integral type zigzag flow channel heat exchange plate comprises the following steps that a prefabricated mould comprises a forming lower mould, a forming upper mould, a prefabricated support plate, a zigzag flow channel pipe and a support column, wherein a buckle is arranged on the support plate, the forming lower mould comprises the forming shape of one side of the integral type zigzag flow channel heat exchange plate, and the forming upper mould comprises the forming shape of the other side of the integral type zigzag flow channel heat exchange plate; secondly, placing a support column in the lower forming die, installing a support plate above the support column, installing a bent flow channel pipe on the support plate, and fastening the bent flow channel pipe by using a buckle arranged on the bent flow channel pipe; thirdly, laying a required amount of resin composite material into a lower molding die; fourthly, covering the upper forming die onto the lower forming die; fifthly, applying pressure on the upper forming die, heating the resin composite material and keeping the temperature for a period of time; and sixthly, stopping heating, keeping the pressure to normal temperature, and then demoulding.
2. A process of manufacturing an integrated serpentine flow channel heat exchange plate as claimed in claim 1 wherein: the supporting plate, the buckle and the supporting column prefabricated in the first step are made of clinker which is solidified and formed by the same materials for manufacturing the heat exchange plate of the zigzag flow channel.
3. A process of manufacturing an integrated serpentine flow channel heat exchange plate as claimed in claim 2 wherein: the bent flow passage pipe in the first step is formed by bending a metal pipe back and forth.
4. A process of manufacturing an integrated serpentine flow channel heat exchange plate as claimed in claim 3 wherein: the material of the tortuous flow passage pipe in the first step is stainless steel.
5. The process of manufacturing an integrated serpentine flow channel heat exchange plate according to claim 4 wherein: and in the second step, a support column is arranged in a corresponding groove in the lower forming die.
6. A process of manufacturing an integrated serpentine flow channel heat exchange plate as claimed in claim 1 wherein: the resin composite material in the third step comprises the following components: 76-79% of unsaturated resin, 18-21% of GF special yarn and 2.6-3.0% of curing assistant.
7. A process of manufacturing an integrated serpentine flow channel heat exchange plate as claimed in claim 6 wherein: in the third step, the required quantity of the material laying is the thickness of the material after being fully melted, cooled and formed: 85-95 mm.
8. A process of manufacturing an integrated serpentine flow channel heat exchange plate as claimed in claim 7 wherein: the material full flowing temperature in the fifth step is as follows: 145-155 ℃.
9. A process of manufacturing an integrated serpentine flow channel heat exchange plate as claimed in claim 7 wherein: and the time for keeping the constant temperature and pressure in the fifth step is 55-65 minutes.
CN202110301692.3A 2021-03-22 2021-03-22 Process for manufacturing integrated heat exchange plate with zigzag flow passage Pending CN113043622A (en)

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CN202110301692.3A CN113043622A (en) 2021-03-22 2021-03-22 Process for manufacturing integrated heat exchange plate with zigzag flow passage
CN202110312118.8A CN113091492A (en) 2021-03-22 2021-03-22 Integral zigzag flow passage heat exchange plate

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CN108696957A (en) * 2017-04-07 2018-10-23 佛山市顺德区美的电热电器制造有限公司 Coil panel and its processing method, electromagnetism cooking equipment
CN109078366A (en) * 2017-06-14 2018-12-25 浙江复洁环保设备有限公司 A kind of Combined filter board and preparation method thereof
CN109395441A (en) * 2018-11-27 2019-03-01 河南大张过滤设备有限公司 A kind of quick injection molding filter plate and preparation method
CN211987279U (en) * 2020-04-13 2020-11-24 张振利 Plate and frame filter press

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