CN113983832A - Heat exchanger and gas heater with anti-corrosion structure - Google Patents

Heat exchanger and gas heater with anti-corrosion structure Download PDF

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Publication number
CN113983832A
CN113983832A CN202111370574.4A CN202111370574A CN113983832A CN 113983832 A CN113983832 A CN 113983832A CN 202111370574 A CN202111370574 A CN 202111370574A CN 113983832 A CN113983832 A CN 113983832A
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CN
China
Prior art keywords
heat exchange
anode
flexible electronic
exchange tube
tube
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Pending
Application number
CN202111370574.4A
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Chinese (zh)
Inventor
卢曦
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Wuhan Ouzhong Technology Development Co ltd
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Wuhan Ouzhong Technology Development Co ltd
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Priority to CN202111370574.4A priority Critical patent/CN113983832A/en
Publication of CN113983832A publication Critical patent/CN113983832A/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
    • 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
    • F28D1/04—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 tubular conduits
    • F28D1/047—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 tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/004—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using protective electric currents, voltages, cathodes, anodes, electric short-circuits

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

The invention relates to a heat exchanger with an anti-corrosion structure, which comprises a copper shell, a copper heat exchange tube arranged in the shell, a copper water inlet tube and a copper water outlet tube which are arranged outside the shell and are communicated with the heat exchange tube, a flexible electronic anode and an anode controller. The flexible electronic anode extends into the heat exchange tube and is matched with the length and the bending shape of the heat exchange tube, one end of the flexible electronic anode extends out of the heat exchange tube and is connected with the positive end of the anode controller, and the negative end of the anode controller is connected with the outer wall of the heat exchange tube. The part of the flexible electronic anode in the heat exchange tube is provided with a structure which alternately appears along the length direction of a limiting insulation section and an exposed coating section, and the limiting insulation section can prevent the electronic anode from contacting with the inner wall of the heat exchange tube. The flexible electronic anode extends into the heat exchange tube and the water inlet and outlet tube which are bent and coiled, and electrons are excited through the exposed coating sections of the electronic anode, so that the corrosion of the heat exchange tube and the water inlet and outlet tube is prevented.

Description

Heat exchanger and gas heater with anti-corrosion structure
Technical Field
The invention relates to the field of corrosion prevention of gas water heaters, in particular to a heat exchanger with an anti-corrosion structure and a gas water heater.
Background
The heat exchanger of the gas water heater is a part for transferring gas combustion heat to water in a pipeline, a water flow channel is generally formed by serially connecting a water inlet pipe, a heat exchange straight pipe, a connecting bent pipe and a water outlet pipe, a heat exchange fin is fixed outside the heat exchange straight pipe, the heat exchange straight pipe and the heat exchange fin are located inside a copper heat exchanger shell and are directly burned and heated by a burner, and a water outlet pipe usually extends downwards after being coiled for a plurality of circles outside the copper heat exchanger shell to form a hot water outlet.
In the prior art, because a relatively thin copper pipe forms a water flow channel, an effective anti-corrosion measure is generally not taken, and the heat exchanger of the gas water heater is replaced after being corroded until the situation of perforation and water leakage occurs. The main reasons for not taking anti-corrosion measures are: the copper pipe is thin, the diameter of the copper pipe is usually 10-15mm, water flows in the pipe, corrosion is carried out from the pipe, part of the pipe section of the copper pipe is burnt and heated by a burner, the inner wall of the pipe is not easy to perform anticorrosion treatment, meanwhile, a conventional electronic anode for electrochemical corrosion prevention is usually hard and short, on one hand, the copper pipe cannot be effectively installed on the copper pipe, on the other hand, the conventional electronic anode is short, the copper pipe is relatively long, even if the short electronic anode is installed on the copper pipe extremely, the corrosion prevention effect of the copper pipe is usually only as good as that of a short section of copper pipe, and the corrosion prevention effect is poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing a heat exchanger with an anti-corrosion structure and a gas water heater, and aims to overcome the defect that the conventional gas water heater and the heat exchanger thereof in the prior art lack an effective anti-corrosion structure.
The technical scheme for solving the technical problems is as follows: the utility model provides a heat exchanger with anticorrosion structure, including the copper casing, be located the copper heat exchange tube of casing and be located the casing outer with the copper inlet tube and the outlet pipe of heat exchange tube intercommunication, it still includes flexible electron positive pole and positive pole controller, flexible electron positive pole stretch into in the heat exchange tube and with the length and the crooked shape phase-match of heat exchange tube, flexible electron positive pole one end stretch out to the heat exchange tube is outside and with the anodal electricity of positive pole controller is connected, the negative pole of positive pole controller with casing, heat exchange tube, inlet tube or outlet pipe electricity are connected, flexible electron positive pole is located part in the heat exchange tube has the structure that appears along the spacing insulating segment of length direction and naked coating section in turn, spacing insulating segment can prevent naked coating section with the contact of heat exchange tube inner wall.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the limiting insulation section is an insulation plastic sleeve sleeved on the flexible electronic anode.
The further structural improvement has the advantages that the insulating plastic sleeve is easy to arrange outside the flexible electronic anode, the structure is simple, and the processing and the realization are easy; the insulating plastic sleeve can insulate the flexible electronic anode from the heat exchange tube, so that the anode is not conducted with the heat exchange tube, and the heat exchange tube is ensured to be a cathode.
Furthermore, the limiting insulation section further comprises a plurality of limiting lantern rings, and the limiting lantern rings are sleeved and fixed on the insulating plastic sleeves.
Adopt above-mentioned further modified benefit to be, spacing lantern ring can carry on spacingly to flexible electron anode, effectively prevents to expose coating interval and heat exchange tube inner wall contact.
Further, the spacing lantern ring includes outer support ring, interior solid fixed ring and many radial extensions's spoke, the spoke both ends are connected respectively outer support ring and interior solid fixed ring, interior solid fixed ring cover is established and is fixed in on the insulating plastic cover, outer support ring with the inner wall clearance fit of heat exchange tube.
Adopt above-mentioned further institutional advancement's benefit to be, by spoke connection between the inside and outside support ring, for the passageway that supplies water flow to pass between the spoke, can effectively spacing flexible electron positive pole promptly, can guarantee again to reduce the water resistance and reduce the impact of rivers to flexible electron positive pole silk.
Furthermore, the limiting lantern ring is fixed at the position, close to the exposed coating section, of the insulating plastic sleeve.
Adopt above-mentioned further institutional advancement's benefit to be, the bare coating section can be supported the jack-up by the spacing lantern ring at both ends to effectively avoid contacting with the pipe wall of heat exchange tube.
Furthermore, the heat exchange tube is provided with an interface for the flexible electronic anode to extend into, the interface is detachably connected with a sealing cover, and the flexible electronic anode penetrates through the sealing cover in an insulating manner.
The advantage of adopting above-mentioned further institutional advancement is, make things convenient for the flexible electron anode to stretch into to the inside of heat exchange tube when initial.
Further, heat exchange tube, inlet tube and outlet pipe are the different pipeline sections of same copper pipe, the quantity of flexible electron positive pole is one and passes from inlet tube, heat exchange tube and outlet pipe in proper order, heat exchange tube, inlet tube and outlet pipe respectively through the wire with the negative pole electricity of anode controller is connected.
The further structural improvement has the advantages that the number of the interfaces arranged on the copper pipe is reduced, the processing cost is low, and the risk of water leakage is effectively reduced; when only one interface is arranged, the flexible electronic anode is arranged when the copper pipe is a straight pipe, and then the copper pipe is bent.
Furthermore, the flexible electronic anode wires are provided with a plurality of wires, and at least one flexible electronic anode is arranged in each of the heat exchange tube, the water inlet tube and the water outlet tube.
The advantage of adopting above-mentioned further institutional advancement does, is favorable to guaranteeing that every flexible electron positive pole length is suitable and for the straight line as far as possible, is favorable to installing flexible electron positive pole again after copper pipe bending.
Furthermore, the flexible electronic anode wire is made of corrosion-resistant titanium alloy or valve metal, and the diameter of the flexible electronic anode is 0.25-1 mm.
The invention also provides a gas water heater which is provided with the heat exchanger.
Compared with the prior art, the invention has the beneficial effects that:
at present, no effective corrosion prevention method exists for a multi-bending heat exchanger of a gas water heater. The flexible electronic anode is electrically connected with the anode of the anode controller in the copper heat exchange tube of the heat exchanger, the cathode of the anode controller is electrically connected with the copper shell, the heat exchange tube or the water inlet and outlet tube, and when water exists in the heat exchange tube, a communicating loop is integrally formed. The anode controller outputs protection current according to the properties of the copper material, the temperature of water in the heat exchange tube, the water quality and other factors through the flexible electronic anode, and effective cathodic protection is implemented on each tube section.
Drawings
FIG. 1 is a schematic view of a heat exchanger with corrosion protection features provided by the present invention;
FIG. 2 is a schematic view of the heat exchange tube of FIG. 1 and a flexible electronic anode incorporated therein in accordance with the present invention;
FIG. 3 is a cross-sectional view A-A of the heat exchange tube of FIG. 2 and a flexible electronic anode therein;
FIG. 4 is an enlarged view of the circled area of FIG. 2;
FIG. 5 is a schematic view of the flexible electronic anode positioned axially within the heat exchange tube when the flexible electronic anode has a solid and thin stop collar;
FIG. 6 is a schematic diagram of the corrosion protection effect of the flexible electronic anode in the heat exchange tube (due to the external anode controller, when the protection current is generated, the tube wall of the heat exchange tube has surplus electrons).
In the drawings, the components represented by the respective reference numerals are listed below:
1. a housing; 2. a heat exchange pipe; 3. a water inlet pipe; 4. a water outlet pipe; 5. a flexible electronic anode; 6. an anode controller; 7. limiting the insulation section; 8. a bare coating section; 9. insulating plastic sleeves; 10. a limiting lantern ring; 11. an outer support ring; 12. an inner fixing ring; 13. spokes; 14. an interface; 15. and (7) sealing the cover.
Detailed Description
The principles and features of this invention are described in connection with the drawings and the detailed description of the invention, which are set forth below as examples to illustrate the invention and not to limit the scope of the invention.
In the description of the present invention, if terms indicating orientation such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc., are used, they indicate orientation or positional relationship based on that shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 6, the invention provides a heat exchanger with an anti-corrosion structure, which comprises a copper shell 1, a copper heat exchange tube 2 positioned in the shell 1, a copper water inlet tube 3 and a copper water outlet tube 4 positioned outside the shell 1 and communicated with the heat exchange tube 2, and further comprises a flexible electronic anode 5 and an anode controller 6, wherein the flexible electronic anode 5 extends into the heat exchange tube 2 and is matched with the length and the bending shape of the heat exchange tube 2, one end of the flexible electronic anode 5 extends out of the heat exchange tube 2 and is electrically connected with the anode of the anode controller 6, the cathode of the anode controller 6 is electrically connected with the shell 1, the heat exchange tube 2, the water inlet tube 3 or the water outlet tube 4, and the part of the flexible electronic anode 5 positioned in the heat exchange tube 2 has a structure with spacing insulation sections 7 and exposed coating sections 8 alternately arranged along the length direction, the limiting insulation section 7 is longer than the exposed coating section 8 and can prevent the exposed coating section 8 from contacting with the inner wall of the heat exchange tube 2.
It should be noted that the diameter of the flexible electronic anode is much smaller than the inner diameter of the heat exchange tube, so as to ensure that the flow of water in the tube is not affected, and the thin and light flexible electronic anode can be appropriately disturbed in the tube when the water flows, so as to reduce the probability of scaling in the tube. The flexible electronic anode comprises a slender anode core body, wherein the anode core body is made of corrosion-resistant metal, insulating plastic sleeves are uniformly arranged outside the anode core body at intervals along the axial direction to form limiting insulating sections, and a bare coating section is arranged between every two adjacent limiting insulating sections (namely the surface of the core body is coated with a precious metal coating such as platinum or iridium).
In an embodiment of the present invention, the position-limiting insulating section 7 is an insulating plastic sleeve 9 sleeved on the flexible electronic anode 5.
It should be noted that the insulating plastic sleeve (the insulating coating is also considered) should have a certain heat-resistant and corrosion-resistant effect, so as to ensure that the insulating plastic sleeve can be used in the hot water pipe for a long time without damage and falling off.
In an embodiment of the present invention, the position-limiting insulating section 7 further includes a plurality of position-limiting collars 10, and the position-limiting collars 10 are fixed on the insulating plastic sleeve 9 in a sleeved manner.
It should be noted that the stop collar may be a larger support ring with water-permeable pores as shown in fig. 2 and 3, or a smaller solid ring as shown in fig. 5.
In an embodiment of the present invention, as shown in fig. 3, the position-limiting collar 10 includes an outer supporting ring 11, an inner fixing ring 12 and a plurality of spokes 13 extending radially, two ends of the spokes 13 are respectively connected to the outer supporting ring 11 and the inner fixing ring 12, the inner fixing ring 12 is fixed on the insulating plastic sleeve 9, and the outer supporting ring 11 is in clearance fit with the inner wall of the heat exchanging tube 2.
In one embodiment of the present invention, the position-limiting collar 10 is fixed on the insulating plastic sleeve 9 at a position adjacent to the exposed coating section 8.
It should be noted that, when the insulating plastic sheath is thick and the exposed coating section is short, the exposed coating section is not easy to contact with the copper pipe wall, and the limiting sleeve ring may not be provided.
In one embodiment of the invention, the heat exchange tube 2 is provided with a port 14 for the flexible electronic anode 5 to extend into, a sealing cover 15 is detachably connected to the port 14, and the flexible electronic anode is insulated and penetrates through the sealing cover.
It should be noted that the sealing cover is used for preventing water in the tube from leaking outside through the interface on one hand, and on the other hand, ensuring that the flexible electronic anode can be electrically connected with the anode controller through a lead, and the sealing cover can be integrally insulated with the heat exchange tube and also integrally insulated with the flexible electronic anode.
In an embodiment of the invention, the heat exchange tube 2, the water inlet tube 3 and the water outlet tube 4 are different tube sections of the same copper tube, the number of the flexible electronic anodes 5 is one, the flexible electronic anodes sequentially penetrate through the water inlet tube 3, the heat exchange tube 2 and the water outlet tube 4, and the heat exchange tube 2, the water inlet tube 3 and the water outlet tube 4 are respectively and electrically connected with a negative electrode of the anode controller 6 through leads.
It can be understood that when there is only one through-length flexible electronic anode in the whole copper tube, the flexible electronic anode should be installed into the tube when the copper tube is not installed into the shell and is not bent and coiled outside the shell but still is a straight tube, and then the copper tube is installed and bent to form, and the flexible electronic anode wire is bent to form when the copper tube is bent.
In one embodiment of the present invention, there are a plurality of the flexible electronic anodes 5, and at least one of the flexible electronic anodes is disposed in each of the heat exchange tube 2, the water inlet tube 3 and the water outlet tube 4.
It can be understood that, when the heat exchange tube is mounted on the heat exchanger shell first and then the flexible electronic anode is mounted, the flexible electronic anode can be mounted in the manner of the present embodiment, that is, a plurality of flexible electronic anodes are mounted, each flexible electronic anode is mounted on a relatively straight tube section of the copper tube, and the flexible electronic anode is convenient to replace.
In one embodiment of the invention, the flexible electronic anode 5 is corrosion-resistant titanium alloy wire or valve metal, and the diameter of the flexible electronic anode 5 is 0.25-2 mm.
It should be noted that, the flexible electronic electrode is preferably made of a material having good corrosion resistance, so as to ensure its durability.
The invention also provides a gas water heater which is provided with the heat exchanger.
The basic principle of the invention is that as shown in fig. 6, a copper heat exchange tube 2 of the heat exchanger is internally provided with a flexible electronic anode 5 which is electrically connected with the anode of an anode controller 6, the cathode of the anode controller is electrically connected with a copper shell, the heat exchange tube or a water inlet and outlet tube, and when water is in the heat exchange tube, a communication loop is integrally formed. The anode controller outputs protection current according to the properties of the copper material, the temperature of water in the heat exchange tube, the water quality and other factors through the flexible electronic anode, and effective cathodic protection is implemented on each tube section. The invention is mainly characterized in that the filament with the diameter far smaller than the inner diameter of the copper pipe is used as the electronic anode and can be arranged along the whole copper pipe, so that the whole pipe section is respectively acted by the electronic anode on each small pipe section and generates surplus electrons on the pipe wall, and the whole pipe wall can be effectively protected.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The heat exchanger with the anti-corrosion structure comprises a copper shell (1), a copper heat exchange tube (2) arranged in the shell (1), a copper water inlet tube (3) and a copper water outlet tube (4) which are arranged outside the shell (1) and communicated with the heat exchange tube (2), and is characterized by further comprising a flexible electronic anode (5) and an anode controller (6), wherein the flexible electronic anode (5) extends into the heat exchange tube (2) and is matched with the protected length and the bending shape of the heat exchange tube (2), one end of the flexible electronic anode (5) is connected with an anode controller anode, the other end or the other end of the flexible electronic anode (5) is divided into multiple ends to extend into all parts in the heat exchange tube (2), the cathode of the anode controller (6) is electrically connected with the outer wall of the shell (1) or the heat exchange tube (2) or the water inlet tube (3) or the water outlet tube (4), and the part of the flexible electronic anode (5) arranged in the heat exchange tube (2) is provided with an insulating layer limited in the length direction The structure that section (7) and naked coating section (8) appear in turn, spacing insulating segment (7) prevent naked coating section (8) with heat exchange tube (2) inner wall contact.
2. The heat exchanger with the anti-corrosion structure according to claim 1, wherein a flexible electronic anode (5) penetrates through the heat exchange tube, the flexible electronic anode (5) is composed of a limiting insulation section (7) and a bare coating section (8), the limiting insulation section (7) is a part of the flexible electronic anode body coated or sleeved with an insulation layer, and the bare coating section (8) is a part of the flexible electronic anode body coated with a noble metal layer.
3. The heat exchanger with the anti-corrosion structure according to claim 1, wherein the heat exchange tube (2), the water inlet tube (3) and the water outlet tube (4) are different tube sections of the same copper tube, the number of the flexible electronic anodes (5) is one, and the flexible electronic anodes sequentially penetrate through the water inlet tube (3), the heat exchange tube (2) and the water outlet tube (4), and the heat exchange tube (2), the water inlet tube (3) and the water outlet tube (4) are respectively electrically connected with the negative electrode of the anode controller (6) through leads.
4. The heat exchanger with the anti-corrosion structure according to claim 1, wherein the flexible electronic anode (5) has a plurality of sections, and one flexible electronic anode (5) can be arranged in each section of the heat exchange tube (2), the water inlet tube (3) and the water outlet tube (4).
5. The heat exchanger with corrosion protection structure according to any one of claims 1 to 4, wherein the flexible electronic anode (5) is corrosion resistant titanium alloy or other valve metal, and the diameter of the flexible electronic anode (5) is 0.25-2 mm.
6. The heat exchanger with the anticorrosion structure according to claim 2, wherein the position-limiting insulating section (7) further comprises a plurality of position-limiting collars (10), and the position-limiting collars (10) are sleeved and fixed on the insulating plastic sleeve (9).
7. The heat exchanger with the anticorrosion structure according to claim 6, wherein the position limiting sleeve ring (10) comprises an outer supporting ring (11), an inner fixing ring (12) and a plurality of radial extending spokes (13), two ends of the spokes (13) are respectively connected with the outer supporting ring (11) and the inner fixing ring (12), the inner fixing ring (12) is sleeved and fixed on the insulating plastic sleeve (9), and the outer supporting ring (11) is in clearance fit with the inner wall of the heat exchange tube (2).
8. The heat exchanger with the anti-corrosion structure according to claim 6, wherein the position limiting collar (10) is fixed at the position of the insulating plastic sleeve (9).
9. The heat exchanger with the anti-corrosion structure according to claim 1, wherein the heat exchange tube (2) is provided with a port (14) for the flexible electronic anode (5) to extend into, the port (14) is provided with a sealing cover (15) which is detachably connected, and the flexible electronic anode is connected to the anode of the anode controller (6) in an insulating way through the sealing cover (15).
10. A gas water heater having the heat exchanger of any one of claims 1 to 9.
CN202111370574.4A 2021-11-18 2021-11-18 Heat exchanger and gas heater with anti-corrosion structure Pending CN113983832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111370574.4A CN113983832A (en) 2021-11-18 2021-11-18 Heat exchanger and gas heater with anti-corrosion structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111370574.4A CN113983832A (en) 2021-11-18 2021-11-18 Heat exchanger and gas heater with anti-corrosion structure

Publications (1)

Publication Number Publication Date
CN113983832A true CN113983832A (en) 2022-01-28

Family

ID=79749405

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111370574.4A Pending CN113983832A (en) 2021-11-18 2021-11-18 Heat exchanger and gas heater with anti-corrosion structure

Country Status (1)

Country Link
CN (1) CN113983832A (en)

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