CN208983628U - A kind of fin-tube heat exchanger - Google Patents

A kind of fin-tube heat exchanger Download PDF

Info

Publication number
CN208983628U
CN208983628U CN201821493107.4U CN201821493107U CN208983628U CN 208983628 U CN208983628 U CN 208983628U CN 201821493107 U CN201821493107 U CN 201821493107U CN 208983628 U CN208983628 U CN 208983628U
Authority
CN
China
Prior art keywords
heat exchanger
fin
circuit system
tube
water circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201821493107.4U
Other languages
Chinese (zh)
Inventor
卢宇凡
潘同基
张上兵
李罗标
唐元锋
张华平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Vanward New Electric Co Ltd
Original Assignee
Guangdong Vanward New Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Vanward New Electric Co Ltd filed Critical Guangdong Vanward New Electric Co Ltd
Priority to CN201821493107.4U priority Critical patent/CN208983628U/en
Application granted granted Critical
Publication of CN208983628U publication Critical patent/CN208983628U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Fluid Heaters (AREA)

Abstract

The utility model discloses a kind of fin-tube heat exchanger, it includes heat-exchanging component and is covered on the first end cover and second end cover at the both ends of heat-exchanging component respectively, heat-exchanging component includes heat exchanger tube and several heat exchanger fins, heat exchanger tube is bent to form the water circuit system of tubular using being integrally formed, and each heat exchanger fin is set on water circuit system along the central axis spacer sleeve of water circuit system;Water circuit system includes several sequentially connected pipe units, pipe unit includes sequentially connected first straight pipe, the first bend loss, the second straight pipe, the second bend loss, first straight pipe is connected to the second bend loss of the adjacent pipe unit, each first straight pipe constitutes the outer layer heat exchange structure of the water circuit system, and each second straight pipe constitutes the internal layer heat exchange structure of water circuit system.The utility model has the following beneficial effects: can be avoided the water leakage of heat exchanger tube, and homogeneous heating, the thermal efficiency are high.

Description

A kind of fin-tube heat exchanger
Technical field
The utility model relates to technical field of heat exchange equipment, more particularly to a kind of fin-tube heat exchanger.
Background technique
Heat exchanger is one of the core component of gas-heating water heater and gas heater, it is related to the use longevity of product Life and safety.In traditional heat exchanger, fin tube type structure or plank frame are mostly used greatly, and in fin-tube heat exchanger Water circuit system be generally welded by several straight tubes and U pipe, since weld bond is more, be easy leak;Water in plate heat exchanger Road system is even more all using being welded, and the effect of welding directly affects the leakproofness of heat exchanger, and bearing capacity also compares wing The heat exchanger of finned pipe type structure is low, is easy to produce leakage.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, a kind of fin-tube heat exchanger is provided, sealing effect, It is able to bear larger pressure, to guarantee service life;And guarantee that heat exchange is uniform, the thermal efficiency is high.
To achieve the goals above, the utility model provides a kind of fin-tube heat exchanger, the heat-exchanging component including tubular And be covered on the first end cover and second end cover at the both ends of the heat-exchanging component respectively, the heat-exchanging component include heat exchanger tube and Several heat exchanger fins, the heat exchanger tube are bent to form the water circuit system of tubular using being integrally formed, and each heat exchanger fin is along the water The central axis spacer sleeve of road system is set on the water circuit system;The water circuit system includes several sequentially connected pipe units, The pipe unit includes sequentially connected first straight pipe, the first bend loss, the second straight pipe, the second bend loss, and described first Straight pipe is connected to second bend loss of the adjacent pipe unit, and each first straight pipe constitutes the water circuit system Outer layer heat exchange structure, each second straight pipe constitutes the internal layer heat exchange structure of the water circuit system.
Preferably, the equal length of first straight pipe and the second straight pipe, and first straight pipe and Central axis of second straight pipe each parallel to the water circuit system;First bend loss and second bend loss are radius phase Deng semicircle.
Preferably, the cross section of the heat-exchanging component is defined as the plane of reference, first bend loss and adjacent Be projected as angle of second bend loss on the plane of reference of the pipe unit be in 60 ° of " V " shape.
Preferably, the inlet and outlet of the heat exchanger tube are set to the same end of the water circuit system.
Preferably, several pores are offered on the heat exchanger fin, the cross section of the heat-exchanging component is defined as The plane of reference;The position and shape that the pore opens up match with first bend loss in the orthographic projection of the plane of reference;Or Person, the position and shape that the pore opens up match with second bend loss in the orthographic projection of the plane of reference.
Preferably, the outer wall for being bonded the heat exchanger tube is provided on the heat exchanger fin along the edge of the pore First flange.
Preferably, the outer edge of the heat exchanger fin is provided perpendicular to the second flange of its plate face, and described The height of two flange is less than or equal to the interval between the two neighboring heat exchanger fin, and second flange is relative to described The position of first straight pipe opens up jagged.
Preferably, between two heat exchanger fins adjacent in the fin-tube heat exchanger between be divided into 1 ㎜- 6㎜。
Preferably, the first end cover includes first end plate and the first cover board, and the first end plate is set in institute State the first end of water circuit system, outside of first cover plate lid together in the first end plate;The second end cover includes the Two end plates and the second cover board, the second end sleeve-board are located at the second end of the water circuit system, second cover plate lid together in The outside of second end plate;The installation for installing burner is offered on first cover board or second cover board Hole.
Preferably, the heat-exchanging component is made of stainless steel.
The utility model provides a kind of fin-tube heat exchanger, and heat exchanger tube passes through the water for being integrally bent to form generally tubular Road system, due to heat exchanger tube using be integrally formed, can be avoided the welding procedure of splicing tubes, make the good seal performance of heat exchanger tube and Bearing capacity is strong;In addition, the water circuit system in the utility model includes several sequentially connected pipe units, pipe unit includes first Straight pipe and the second straight pipe on the inside of the first straight pipe, the outer layer that each first straight pipe constitutes water circuit system, which exchanges heat, to be tied Structure, each second straight pipe constitutes the internal layer heat exchange structure of water circuit system, so that water circuit system includes inside and outside two layers of heat exchange structure, It exchanges heat uniform and high-efficient.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of fin-tube heat exchanger in the utility model embodiment;
Fig. 2 is a kind of configuration schematic diagram of fin-tube heat exchanger in the utility model embodiment;
Fig. 3 is the mounting structure schematic diagram of heat exchanger fin and heat exchanger tube in the utility model embodiment;
Fig. 4 is the structural schematic diagram of heat exchanger tube in the utility model embodiment;
Fig. 5 is the schematic top plan view of Fig. 4;
Fig. 6 is the structural schematic diagram of heat exchanger fin in the utility model embodiment.
In figure, 10, heat-exchanging component;11, heat exchanger tube;111, water inlet;112, water outlet;12, heat exchanger fin;121, pore; 122, the first flange;123, the second flange;1231, notch;13, water circuit system;131, pipe unit;1311, the first straight pipe; 1312, the first bend loss;1313, the second straight pipe;1314, the second bend loss;132, inlet segment;133, water exit end;20, first End cap;21, first end plate;22, the first cover board;221, mounting hole;30, second end cover;31, the second end plate;32, the second cover board.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
In the description of the present invention, it should be understood that term " on ", "lower", "left", "right", "top", "bottom" etc. The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation structure It makes and operates, therefore should not be understood as limiting the present invention.It should be understood that using term in the utility model " first ", " second " etc. describe various information, but these information should not necessarily be limited by these terms, these terms are only used to will be same The information of type is distinguished from each other out.For example, " first " information can also be claimed in the case where not departing from the scope of the utility model Similar for " second " information, " second " information can also be referred to as " first " information.
As shown in figs 1 to 6, a kind of fin-tube heat exchanger of the preferred embodiment in the utility model comprising tubular is changed Hot component 10 and be covered on respectively the heat-exchanging component 10 both ends first end cover 20 and second end cover 30, first end cover 20, combustion chamber is formed between second end cover 30, heat-exchanging component 10, the heat-exchanging component 10 includes heat exchanger tube 11 and several heat exchanger fins 12, the heat exchanger tube 11 is bent to form the water circuit system 13 of tubular using being integrally formed, and each heat exchanger fin 12 is along the water route The central axis spacer sleeve of system 13 is set on the water circuit system 13, forms heat exchanger channels between two adjacent heat exchanger fins 45. The water circuit system 13 includes several sequentially connected pipe units 131, and the pipe unit 131 includes sequentially connected first straight tube Section the 1311, first bend loss 1312, the second straight pipe 1313, the second bend loss 1314, first straight pipe 1311 are connected to Second bend loss 1314 of the adjacent pipe unit 13,1311 sections of each first straight tube constitute the water circuit system 13 Outer layer heat exchange structure, each second straight pipe 1313 constitutes the internal layer heat exchange structure of the water circuit system 13.
In view of this, the fin-tube heat exchanger in the present embodiment, specific work process are as follows: the height that burner combustion generates Warm flue gas enters in the heat exchanger channels that each heat exchanger fin 12 encloses out of combustion chamber, and high-temperature flue gas is when passing through heat exchanger channels, first It is contacted with the second straight pipe 1313 in internal layer heat exchange structure, to carry out heat exchange, high-temperature flue gas with the water in heat exchanger tube 11 Continue to flow outward again, be contacted with the first straight pipe 1311 in outer layer heat exchange structure, further with the water in heat exchanger tube 11 into Row heat exchange so that the water in heat exchanger tube 11 be made to heat, and is flowed out after high-temperature flue gas cooling from the outside of heat exchanger channels;It is same with this When, cold water is flowed into from the water inlet 111 of heat exchanger tube, and successively alternately flows into the second straight pipe of inside and outside two layers of heat exchange structure 1313 and first straight pipe 1311, it is heated into hot water and is flowed out from water outlet 112.
Based on the above-mentioned technical proposal, a kind of fin-tube heat exchanger is provided in the present embodiment, since heat exchanger tube 11 uses one It is body formed, it is welded without multiple connectors, from the defect that weld bond leak may be not present, can be guaranteed good close Sealing property, and bearing capacity and service life can be increased;In addition, heat exchanger tube 11 is enclosed cylindric water route by bending System 13, water circuit system 13 are double-layer structure, that is, include the endothecium structure being made of each second straight pipe 1313 and by each first The layer structure that straight pipe 1311 forms can increase heat exchange efficiency, and water flow intersects progress internal layer, outer layer heating, makes to heat It is more uniform.
Illustratively, in the present embodiment, again refering to Fig. 2-Fig. 4 it is found that the both ends of the heat exchanger tube 11 further include into water Section 132 and water exit end 133, water inlet 111 are provided on inlet segment 132, and water outlet 112 is provided on water exit end 133, inlet segment 132 and water exit end 133 pass through each heat exchanger fin 12 to be exposed to the end of heat-exchanging component 10, to facilitate access and the hot water of cold water It picks out.
Specifically, in order to simplify the processing technology of heat exchanger tube, first straight pipe 1311 and the second straight pipe 1313 Equal length, and first straight pipe 1311 and the second straight pipe 1313 are each parallel to the center of the water circuit system 13 Axis;First bend loss 1312 and second bend loss 1314 are the equal semicircle of radius, it is only necessary to use one set of die It can be process, to be effectively reduced difficulty of processing.
In the present embodiment, in order to further increase the thermal efficiency, the cross section of the heat-exchanging component 10 is defined as the plane of reference, Second bend loss 1314 of first bend loss 1312 and the adjacent pipe unit 131 is projected as on the plane of reference Angle is in 60 ° of " V " shape, and the first straight pipe 1311 of outer layer and the second straight pipe 1313 of two adjacent internal layers are in the plane of reference On be projected as 3 points composition equilateral triangle shapes.
In the present embodiment, in order to consider cold water access and hot water pick out conveniently, the water inlet 111 of the heat exchanger tube 11 and go out The mouth of a river 112 is set to the same end of the water circuit system 13, referring particularly to shown in Fig. 1, the wherein water inlet 111 of heat exchanger tube 11 The upper end of water circuit system 13 is set to water outlet 112.
In the present embodiment, for the ease of each heat exchanger fin 12 to be installed on water circuit system 13, states and offered on heat exchanger fin 12 The cross section of the heat-exchanging component 10 is defined as the plane of reference by several pores 121;The position and shape that the pore 121 opens up Match with first bend loss 1312 in the orthographic projection of the plane of reference.As an alternative solution, the pore 121 opens up Position and shape match with second bend loss 1314 in the orthographic projection of the plane of reference.
Referring particularly to shown in attached drawing 1 and Fig. 6, wherein location and shape of the pore 121 on heat exchanger fin 12 and all second Projection of the bend loss 1314 on the plane of reference matches, and projection of each second bend loss 1314 on the plane of reference is in kidney-shaped, this When heat exchanger fin 12 on be provided with several with each second bend loss 1314 pore 121 of corresponding kidney-shaped, and the pipe one by one Circumferential array of the hole 121 along heat exchanger fin 12;At this point, when installing heat exchanger, heat exchanger fin 12 from the lower end of heat exchanger tube 11 from lower and On can be arranged on heat exchanger tube 11, and can upper end exchange backing 12 be limited.And if pore 121 on heat exchanger fin 12 Location and shape match with projection of first bend loss 1312 on the plane of reference, on the contrary, when installing heat exchanger, heat exchange Piece 12 can be arranged on heat exchanger tube 11 from top to down from the lower end of heat exchanger tube 11.
Again refering to shown in attached drawing 6, in the present embodiment, the pore 121 of the heat exchanger fin 12 is bonded with the heat exchanger tube 11 Edge is provided with the first flange 122 for being bonded the outer wall of the heat exchanger tube 11, sets on the segmental arc of above-mentioned kidney-shaped pore 121 It is equipped with the first flange 122, the first flange 122 is close to the outer wall of heat exchanger tube 11, can be guaranteed between heat exchanger fin 12 and heat exchanger tube 11 Heat exchange.Illustratively, the heat exchanger fin 12 in the present embodiment is welded on the lateral wall of heat exchanger tube 11.
Further, as shown in fig. 6, the outer edge of the heat exchanger fin 12 is provided perpendicular to the second flange of its plate face 123, the height of second flange 123 is less than or equal to the interval between the two neighboring heat exchanger fin 12, illustratively, The highly preferred of the second flange 123 is 1.5 ㎜ in the present embodiment, and second flange 123 is relative to first straight pipe 1311 position opens up jagged 1231, and the effect of the first flange 122 can control the flowing of the high-temperature flue gas in heat exchanger channels Direction, so that the high-temperature fuel gas in heat exchanger channels outer fix flows to the lateral wall of the first straight pipe 1311 of heat exchanger tube 11 Place, contact high-temperature flue gas with heat exchanger tube 11, is further ensured that heat exchange efficiency.
In the present embodiment, between the heat exchanger fin 12 of adjacent two between be divided into 1 ㎜ -6 ㎜, the i.e. height of heat exchanger channels For 1 ㎜ -6 ㎜, guarantee heat exchange efficiency;Optimally, two heat exchange adjacent in the fin-tube heat exchanger in the present embodiment 2 ㎜ are divided between piece 12.
In order to assemble securely and guarantee the leakproofness at heat exchanger both ends, in the present embodiment, the first end cover 20 includes the End plate 21 and the first cover board 22, the first end plate 21 are set in the first end of the water circuit system, first cover board 22 are covered on the outside of the first end plate 21;The second end cover 30 includes the second end plate 31 and the second cover board 32, and described the Two end plates 31 are set in the second end of the water circuit system, and second cover board 32 is covered on the outer of second end plate 31 Side.Illustratively, in the present embodiment, the inlet segment 132 and water exit end 133 for being set to the heat exchanger tube 11 of the same end are from upper end First end plate 21 and the first cover board 22 in be pierced by.Illustratively, first cover board 22 and the first end plate 21 are using weldering It connects after being connected, then is welded on heat exchanger tube 11 together, likewise, second cover board 32 and second end plate 31 are using welding After being connected, then it is welded on heat exchanger tube 11 together.
In the present embodiment, in order to which burner to be installed in combustion chamber, in first cover board 22 or the second cover board 32 Center at offer mounting hole 221.In the present embodiment, the mounting hole 221 is opened in the first cover board for being set to upper end On 22.
In addition, it is necessary to illustrate, the fin-tube heat exchanger in the present embodiment is mainly used in stainless steel heat exchange In device, i.e., heat-exchanging component 10 is made of stainless steel namely heat exchanger fin 12 and heat exchanger tube 11 are all made of stainless steel material system At;Similarly, it is also applied for copper heat exchanger.
To sum up, the utility model embodiment provides a kind of fin-tube heat exchanger, including water circuit system 13 and interval are arranged Several heat exchanger fins 12 on water circuit system 13, water circuit system 13 is used by heat exchanger tube 11 and is integrally formed, and water circuit system 13 In the double-layer structure including inside and outside two layers of heat exchange structure;Since heat exchanger tube 11 is using being integrally formed, water circuit system 13 can avoid Water droplet leakage improves bearing capacity, corrosion resistance etc., and then increases service life;And water flow is handed over when flowing through water circuit system 13 Alternately pass through outer layer and internal layer, guarantees homogeneous heating and the thermal efficiency is high.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without deviating from the technical principle of the utility model, several improvement and replacement can also be made, these change It also should be regarded as the protection scope of the utility model into replacement.

Claims (10)

1. a kind of fin-tube heat exchanger, which is characterized in that heat-exchanging component (10) including tubular and be covered on described change respectively The first end cover (20) and second end cover (30) at the both ends of hot component (10), the heat-exchanging component (10) include heat exchanger tube (11) And several heat exchanger fins (12), the heat exchanger tube (11) is bent to form the water circuit system (13) of tubular using being integrally formed, each described Heat exchanger fin (12) is set on the water circuit system (13) along the central axis spacer sleeve of the water circuit system (13);
The water circuit system (13) includes several sequentially connected pipe units (131), and the pipe unit (131) includes being sequentially connected The first straight pipe (1311), the first bend loss (1312), the second straight pipe (1313), the second bend loss (1314), described One straight pipe (1311) is connected to second bend loss (1314) of the adjacent pipe unit (131), and each described first is straight Pipeline section (1311) constitutes the outer layer heat exchange structure of the water circuit system (13), and each second straight pipe (1313) constitutes the water The internal layer heat exchange structure of road system (13).
2. fin-tube heat exchanger as described in claim 1, which is characterized in that first straight pipe (1311) and second is directly The equal length of pipeline section (1313), and first straight pipe (1311) and the second straight pipe (1313) are each parallel to the water route The central axis of system (13);
First bend loss (1312) and second bend loss (1314) are the equal semicircle of radius.
3. fin-tube heat exchanger as claimed in claim 2, which is characterized in that the cross section of the heat-exchanging component (10) is fixed Justice is the plane of reference, and the second bend loss (1314) of first bend loss (1312) and the adjacent pipe unit is in the reference The " V " shape for being projected as angle and being in 60 ° on face.
4. fin-tube heat exchanger as described in claim 1, which is characterized in that the water inlet (111) of the heat exchanger tube (11) The same end of the water circuit system (13) is set to water outlet (112).
5. fin-tube heat exchanger as described in claim 1, which is characterized in that the heat exchanger fin (12) if on offer main pipe The cross section of the heat-exchanging component (10) is defined as the plane of reference by hole (121);
The orthographic projection phase of position that the pore (121) opens up and shape and first bend loss (1312) in the plane of reference Matching;
Alternatively, position that the pore (121) opens up and shape and second bend loss (1314) the plane of reference just Projection matches.
6. fin-tube heat exchanger as claimed in claim 5, which is characterized in that along the pore on the heat exchanger fin (12) (121) edge is provided with the first flange (122) for being bonded the outer wall of the heat exchanger tube (11).
7. fin-tube heat exchanger as claimed in claim 6, which is characterized in that the outer edge of the heat exchanger fin (12) is arranged There is the second flange (123) perpendicular to its plate face, the height of second flange (123) is less than or equal to two neighboring described Interval between heat exchanger fin (12), second flange (123) open up in the position relative to first straight pipe (1311) Jagged (1231).
8. fin-tube heat exchanger as described in claim 1, which is characterized in that between the heat exchanger fin (12) of adjacent two Between be divided into 1 ㎜ -6 ㎜.
9. fin-tube heat exchanger as described in claim 1, which is characterized in that the first end cover (20) includes first end plate (21) and the first cover board (22), the first end plate (21) are set in the first end of the water circuit system, first cover board (22) it is covered on the outside of the first end plate (21);
The second end cover (30) includes the second end plate (31) and the second cover board (32), and second end plate (31) is set in described The second end of water circuit system, second cover board (32) are covered on the outside of second end plate (31);
The mounting hole (221) for installing burner is offered on first cover board (22) or second cover board (32).
10. fin-tube heat exchanger as claimed in any one of claims 1-9 wherein, which is characterized in that the heat-exchanging component (10) It is made of stainless steel.
CN201821493107.4U 2018-09-12 2018-09-12 A kind of fin-tube heat exchanger Active CN208983628U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821493107.4U CN208983628U (en) 2018-09-12 2018-09-12 A kind of fin-tube heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821493107.4U CN208983628U (en) 2018-09-12 2018-09-12 A kind of fin-tube heat exchanger

Publications (1)

Publication Number Publication Date
CN208983628U true CN208983628U (en) 2019-06-14

Family

ID=66784057

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821493107.4U Active CN208983628U (en) 2018-09-12 2018-09-12 A kind of fin-tube heat exchanger

Country Status (1)

Country Link
CN (1) CN208983628U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109114811A (en) * 2018-09-12 2019-01-01 广东万和新电气股份有限公司 A kind of fin-tube heat exchanger
CN112460856A (en) * 2019-09-09 2021-03-09 青岛海尔电冰箱有限公司 Condenser

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109114811A (en) * 2018-09-12 2019-01-01 广东万和新电气股份有限公司 A kind of fin-tube heat exchanger
CN112460856A (en) * 2019-09-09 2021-03-09 青岛海尔电冰箱有限公司 Condenser

Similar Documents

Publication Publication Date Title
WO2017162018A1 (en) Counter-flow fin plate heat exchanger for gas-gas heat exchange
US20070000653A1 (en) Heat exchanger, in particular of the condensation type
CN104251629B (en) Heat exchanger and there is its gas heater
WO2018141245A1 (en) Plate-type gas-to-gas heat exchanger
CN109114811A (en) A kind of fin-tube heat exchanger
JP2019510952A (en) Tube type heat exchanger
CN208983628U (en) A kind of fin-tube heat exchanger
US20150323265A1 (en) Heat exchanger having a compact design
JP2017194261A (en) Heat exchanger
CN104735988B (en) Hot-blast baker
CN204202456U (en) Asymmetric phase-change heat-exchanger
CN201706810U (en) Micro-channel heat exchanger for heat pump water heater
CN109114814A (en) A kind of heat exchanger
CN205537227U (en) Heat exchanger and water heater
CN110285695A (en) Telescopic channel heat exchanger
CN208983627U (en) A kind of heat exchanger
CN104296383A (en) Efficient condensing heat exchanger
CN208983625U (en) A kind of heat exchanger
CN109114815A (en) A kind of heat exchanger
CN204100858U (en) Heat exchanger and there is its gas heater
CN202613757U (en) Heat pump water heater
CN204227701U (en) A kind of high-efficiency condensation heat exchanger
CN208983626U (en) A kind of heat exchanger
KR101682229B1 (en) Heat exchanger using waste heat
CN104315909B (en) Asymmetric phase-change heat-exchanger

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant