CN209042765U - Heat exchanger and water heater - Google Patents
Heat exchanger and water heater Download PDFInfo
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- CN209042765U CN209042765U CN201821720183.4U CN201821720183U CN209042765U CN 209042765 U CN209042765 U CN 209042765U CN 201821720183 U CN201821720183 U CN 201821720183U CN 209042765 U CN209042765 U CN 209042765U
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Abstract
The utility model discloses heat exchanger and water heaters, are related to gas heater technical field.Heat exchanger provided by the utility model includes the first heat-exchanging component, the second heat-exchanging component and mounting assembly；First heat-exchanging component includes the first fin and the first heat exchanger tube, and the first fin is connect with the first heat exchanger tube, and the second heat-exchanging component includes the second fin and the second heat exchanger tube, and the second fin is connect with the second heat exchanger tube；Mounting assembly has water inlet, water outlet, first chamber, second chamber and third chamber, water inlet is connected to first chamber, water outlet is connected to second chamber, the both ends of first heat exchanger tube are connected to form first passage with first chamber, and the both ends of the second heat exchanger tube are connected to form second channel with second chamber.The utility model additionally provides a kind of water heater including heat exchanger.Heat exchanger and water-heater heat-exchanging provided by the utility model are high-efficient, and structure is simple, easy for installation, have saved manufacturing cost.
Description
Technical field
The utility model relates to gas heater technical fields, in particular to heat exchanger and water heater.
Background technique
Heat exchanger is a kind of device for making heat be transmitted to from hot fluid cold fluid, is convective heat transfer and heat transfer
A kind of industrial application.Household heat exchanger solves the problems, such as heating family, collective and winter with hot water difficulty.
The heat exchange exchanger of gas heater is easy to produce corrosion drainage during use.At present on the market
The problems such as heat exchanger mostly uses traditional fin-tube type structure, and there are inefficiency and complex process.
Utility model content
The purpose of this utility model is to provide a kind of heat exchangers, and heat exchange efficiency is high, and structure is simple, easy for installation,
Manufacturing cost is saved.
The utility model provides a kind of technical solution about heat exchanger:
A kind of heat exchanger, including the first heat-exchanging component, the second heat-exchanging component and mounting assembly；First heat-exchanging component
Including the first fin and the first heat exchanger tube, first fin is connect with first heat exchanger tube, the second heat-exchanging component packet
The second fin and the second heat exchanger tube are included, second fin is connect with second heat exchanger tube；The mounting assembly has water inlet
Mouth, water outlet, first chamber, second chamber and third chamber, the water inlet are connected to the first chamber, the water outlet
It being connected to the second chamber, the both ends of first heat exchanger tube are connected to form first passage with the first chamber, and described
The both ends of two heat exchanger tubes are connected to form second channel with the second chamber, and the first passage passes through the third chamber and institute
State second channel connection.
Further, the first passage and the second channel are S-shaped, to reduce the first passage and described
The occupied space in two channels.
Further, the mounting assembly includes installation part and baffle, and the installation part is connect simultaneously with the guard seal
Form the first chamber, the second chamber and the third chamber between the installation part and the baffle, it is described into
The mouth of a river and the water outlet are all set in the installation part, first heat exchanger tube and second heat exchanger tube and the baffle connects
It connects.
Further, the installation part has the first groove, the second groove and third groove, the installation part and the gear
First groove and the baffle form the first chamber after plate connection, and second groove and the baffle form described
Second chamber, the third groove and the baffle form the third chamber, and the water inlet is set to first groove,
The water outlet is set to second groove.
Further, first fin is multiple, is clamped between first fin and first heat exchanger tube.
Further, first fin includes ontology and interconnecting piece, and the ontology is provided with card slot, the card slot and institute
The connection of the first heat exchanger tube is stated, the ontology is connect with one end of the interconnecting piece, by described between multiple first fins
The other end of ontology and the interconnecting piece is sequentially connected.
Further, the interconnecting piece includes first connecting portion, second connecting portion and multiple third interconnecting pieces, and described first
Interconnecting piece is arranged around the pocket edges, and the second connecting portion is set to the ontology both ends, between the third interconnecting piece
Every the side for being set to the ontology and being arranged distant from the card slot.
Further, the bottom setting of the card slot is jagged.
Further, turbulent piece is provided in first heat exchanger tube and/or second heat exchanger tube.
The another object of the utility model is to provide a kind of water heater, and heat exchange efficiency is high, and structure is simple, installs and uses
Convenient, manufacturing cost is low.
The utility model also provides a kind of technical solution about water heater:
A kind of water heater, including water heater body, combustion chamber and the heat exchanger, the heat exchanger are changed including first
Hot component, the second heat-exchanging component and mounting assembly.First heat-exchanging component includes the first fin and the first heat exchanger tube, and described the
One fin is connect with first heat exchanger tube, second heat-exchanging component include the second fin and the second heat exchanger tube, described second
Fin is connect with second heat exchanger tube.The mounting assembly has water inlet, water outlet, first chamber, second chamber and the
Three chambers, the water inlet are connected to the first chamber, and the water outlet is connected to the second chamber, first heat exchange
The both ends of pipe are connected to form first passage with the first chamber, and the both ends of second heat exchanger tube are connected to the second chamber
Second channel is formed, the first passage is connected to by the third chamber with the second channel.The combustion chamber is set to
In the water heater body, the mounting assembly is connect with the combustion chamber.
Compared with prior art, the beneficial effect of heat exchanger and water heater provided by the utility model is:
The first heat-exchanging component is arranged in heat exchanger provided by the utility model and the second heat-exchanging component structure increases heat-transfer surface
Product guarantees heat exchange efficiency.First heat-exchanging component includes the first fin and the first heat exchanger tube, and the second heat-exchanging component includes the second fin
With the second heat exchanger tube；First heat exchanger tube and the water inlet of mounting assembly connect, and the water outlet of the second heat exchanger tube and mounting assembly connects
Logical, the first heat exchanger tube is connected to first chamber, and the second heat exchanger tube is connected to second chamber, and the first heat exchanger tube and the second heat exchange
Pipe flows to third channel from first passage through third chamber after entering from the inlet water flow by third chamber, thus
Increase heat exchange area by double heat exchanging structure, guarantees heat exchange efficiency.Meanwhile heat exchanger components provided by the utility model
Quantity is few, easy for installation, also reduce manufacturing cost.
Heat exchanger heat exchange area set by water heater provided by the utility model is big, and heat exchange efficiency is high, structure is simple,
Manufacturing cost is reduced while easy for installation.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described.It should be appreciated that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as.For those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the configuration schematic diagram for the heat exchanger that the embodiments of the present invention provide；
Flow direction schematic diagram in the heat exchanger tube that Fig. 2 provides for the embodiments of the present invention；
Flow direction schematic diagram in the chamber that Fig. 3 provides for the embodiments of the present invention；
Fig. 4 is the installation part structural schematic diagram that the embodiments of the present invention provide；
Fig. 5 is the other side installation part structural schematic diagram that the embodiments of the present invention provide；
Fig. 6 is the baffle arrangement schematic diagram that the embodiments of the present invention provide；
Fig. 7 is the first fin structure schematic diagram that the embodiments of the present invention provide；
Fig. 8 is the first heat exchanger tube cross-sectional view that the embodiments of the present invention provide.
Icon: 10- heat exchanger；The first heat-exchanging component of 100-；The first fin of 110-；111- ontology；112- interconnecting piece；
113- card slot；114- notch；The first heat exchanger tube of 120-；The second heat-exchanging component of 200-；The second fin of 210-；220- second exchanges heat
Pipe；300- mounting assembly；310- first chamber；320- second chamber；330- third chamber；340- water inlet；350- water outlet；
360- installation part；The first groove of 361-；The second groove of 362-；363- third groove；370- baffle；371- heat exchanging holes；400- is horizontal
Section.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, it is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be understood that term " on ", "lower", "inner", "outside", "left", "right" etc.
The orientation or positional relationship of instruction be based on the orientation or positional relationship shown in the drawings or the utility model product use when
The orientation or positional relationship that the orientation or positional relationship or those skilled in the art usually put usually understand, be only for
Convenient for description the utility model and simplify description, rather than the equipment of indication or suggestion meaning or element must have specifically
Orientation is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " etc. are only used for distinguishing description, it is not understood to indicate or imply relatively important
Property.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, " setting ",
Terms such as " connections " shall be understood in a broad sense, for example, " connection " may be a fixed connection, may be a detachable connection, or one
Ground connection；It can be mechanical connection, be also possible to be electrically connected；Can be and be directly connected to, can also by between intermediary in succession
It connects, can be the connection inside two elements.For the ordinary skill in the art, can understand as the case may be
The concrete meaning of above-mentioned term in the present invention.
With reference to the accompanying drawing, specific embodiment of the present utility model is described in detail.Specific embodiment
Referring to Fig. 1, Fig. 1 is the configuration schematic diagram for the heat exchanger 10 that the embodiments of the present invention provide.This
Embodiment provides a kind of heat exchanger 10, and heat exchange efficiency is high, and structure is simple, easy for installation, has saved manufacturing cost.
Heat exchanger 10 provided in this embodiment can be applied to water heater, and heat exchanger 10 is by fuel gas buring in water heater
The heat of generation quickly and efficiently exchanges in water, so that cold water becomes hot water for users to use after flowing through heat exchanger 10.
Heat exchanger 10 provided in this embodiment includes the first heat-exchanging component 100, the second heat-exchanging component 200 and mounting assembly
300.First heat-exchanging component 100 and the second heat-exchanging component 200 are fixed by the installation of mounting assembly 300.
First heat-exchanging component 100 includes the first fin 110 and the first heat exchanger tube 120, the first fin 110 and the first heat exchanger tube
120 connections, to carry out heat exchange between the first fin 110 and the first heat exchanger tube 120.The both ends of first heat pipe respectively with peace
Arrangement 300 connects.
Second heat-exchanging component 200 includes the second fin 210 and the second heat exchanger tube 220, the second fin 210 and the second heat exchanger tube
220 connections, to carry out heat exchange between the second fin 210 and the second heat exchanger tube 220.Likewise, the both ends of the second heat pipe
It is connect respectively with the second mounting assembly 300.
Mounting assembly 300 has water inlet 340, water outlet 350, first chamber 310, second chamber 320 and third chamber
330, water inlet 340 is connected to first chamber 310, and water outlet 350 is connected to second chamber 320.The both ends of first heat exchanger tube 120
It is connected to form first passage (not shown) with first chamber 310 respectively, need, first chamber 310 is used in water from the
Change the flow direction of water in one heat exchanger tube 120 when outflow or when inflow, first chamber 310 can be collectively formed by several chambers.Together
Sample, the second heat exchanger tube 220 is connected to form second channel (not shown) with second chamber 320.
It should be noted that first passage and second channel are connected to by third chamber 330, that is, first passage and the
Two channels are connected to third chamber 330 respectively.The practical connection of first passage and third chamber 330 is the first heat exchanger tube 120
The port of section of tubing is connected to third chamber 330；The practical connection of second channel and third chamber 330 is the second heat exchanger tube
The port of 220 section of tubing is connected to third chamber 330.
In the present embodiment, first passage and second channel are set side by side to form upper and lower or two layers of the heat exchange structure in left and right.Into
The same end of mounting assembly 300 is arranged in the mouth of a river 340 and water outlet 350, and heat exchanger can be efficiently reduced when being installed
10 occupied space sizes；The both ends of the first heat exchanger tube 120 and the second heat exchanger tube 220 are arranged in mounting assembly 300, are installing
The outside of component 300 is not provided with any pipeline, further reduces needed for the occupied space of heat exchanger 10 and manufacture
Material quantity, save the cost.Meanwhile first passage and second channel are set as form arranged side by side, in first passage and second
It is between mutually adjacent, mutually adjacent first passage and second channel when heat distributes that, which respectively there is side in channel, and first is logical
Road can absorb the heat that more second channels distribute, and second channel can absorb the heat that more first passages distribute, thus
So that heat exchange efficiency is higher.
Please refer to Fig. 2 and Fig. 3, flow direction schematic diagram in the heat exchanger tube that Fig. 2 provides for the embodiments of the present invention, figure
Flow direction schematic diagram in 3 chambers provided for the embodiments of the present invention.First passage and second channel internal heat stream
Road is S-shaped.S-shaped herein only indicates that heat exchange runner provided by the present embodiment has the similar the same runner revolution side of S-shaped
To, be not intended to limit heat exchange runner revolution inflection point number.It sets S-shaped for first passage and second channel and can reduce first leading to
Road and the occupied space of second channel.
Referring to Fig. 2, first passage tool changes flow direction, arrow in figure there are three inflection point, water flow is turned round at revolution inflection point
Direction indicate flow direction of the water in heat exchanger 10.Revolution inflection point possessed by first passage is practical by first chamber
310 are constituted, and the water flow flowed into through water inlet 340 flows in the first heat exchanger tube 120, after first revolution inflection point changes flow direction
Second revolution inflection point is continued to flow to, second revolution inflection point changes flow direction again, and it is similar that third turns round inflection point.It is easy reason
Solution, if any multiple revolution inflection points, water (flow) direction changes similar.Water flow enters third after undergoing the last one revolution inflection point
Chamber 330, water flow changes flow direction into second channel in third chamber 330, finally flows out from the exit of second channel, the
Two channel set-up modes are similar with first passage, and details are not described herein again.
It is understood that the position of water inlet 340 and water outlet 350 can be in the same side of mounting assembly 300, it can also
Not ipsilateral；Can be mutually adjacent at the same side or set with being located remotely from each other in the position of water inlet 340 and water outlet 350
It is placed in the both ends of 300 the same side of mounting assembly.
Optionally, the heat exchanger 10 that the present embodiment refers to can be made to improve its corrosion resistance of stainless steel material
Can, it is not limited only to this, can also be made of materials such as oxygen-free coppers.
Fig. 4 to fig. 6 is please referred to, Fig. 4 is 360 structural schematic diagram of installation part that the embodiments of the present invention provide, and Fig. 5 is
360 structural schematic diagram of other side installation part that the embodiments of the present invention provide, Fig. 6 provide for the embodiments of the present invention
370 structural schematic diagram of baffle.Mounting assembly 300 includes installation part 360 and baffle 370, and installation part 360 and baffle 370 seal
Connection, is provided with the first groove 361, the second groove 362 and third groove 363 on installation part 360.Installation part 360 and baffle
370 form first chamber 310, second chamber 320 and third chamber after linking together between installation part 360 and baffle 370
Room 330.The both ends of first heat exchanger tube 120 and the second heat exchanger tube 220 are connect with baffle 370 respectively, are opened up on baffle 370 useful
In the heat exchanging holes 371 being connect with the first heat exchanger tube 120 and the second heat exchanger tube 220, by the channel and the in the first heat exchanger tube 120
One chamber 310 is connected to, and the channel in the second heat exchanger tube 220 is connected to second chamber 320.
Water inlet 340 is arranged in the first groove 361, to connect to form first chamber with installation part 360 in the first groove 361
It is connected to by first chamber 310 with the first heat exchanger tube 120 after 310；Water outlet 350 is arranged in the second groove 362, with recessed second
Slot 362 is connect with installation part 360 to form second chamber 320 after be connected in the second heat exchanger tube 220 by second chamber 320.
Referring to Fig. 7, Fig. 7 is 110 structural schematic diagram of the first fin that the embodiments of the present invention provide.Optionally,
First fin 110 be it is multiple, the first fin 110 include ontology 111 and interconnecting piece 112, one end of ontology 111 and interconnecting piece 112
It is fixedly connected, successively passes through the ontology of the other end of interconnecting piece 112 and another fin between two adjacent the first fins 110
111 connections.Multiple first fins 110 are linked together, the efficiency of heat exchange exchange can be further improved.In the first fin
Card slot 113 is provided on 110 ontologies 111, the first heat exchanger tube 120 is connected in card slot 113.First fin 110 and the first heat exchange
It is connected by way of card slot 113 between pipe 120 convenient for assembly, can be exchanged heat convenient for user to first using the opening of card slot 113
The use state of pipe 120 is checked, determines the use state of the first heat exchanger tube 120.
Optionally, it is arranged jagged 114 in the bottom of card slot 113.Notch 114, which is arranged, can be convenient for the first fin 110 and the
Position when being clamped between one heat exchanger tube 120 is adjusted, and promotes the stability of connection, and then improve heat exchange efficiency.Similarly,
Second fin 210 and the first fin 110 are same design, are only described here with the first fin 110, to the second fin 210
Details are not described herein again.
Optionally, turbulent piece (not shown) is provided in the first heat exchanger tube 120 and/or the second heat exchanger tube 220.Turbulent piece
It can be positioned only in the first heat exchanger tube 120, can also be positioned only in the second heat exchanger tube 220, naturally it is also possible to be changed first
It is respectively provided in heat pipe 120 and the second heat exchanger tube 220.Turbulent piece, which is arranged, can improve heat exchange efficiency, eliminate gasification noise, improve user
Experience.
It is understood that the quantity of turbulent piece setting can be in the first heat exchanger tube 120 and/or the second heat exchanger tube 220
Interior setting one, can also be respectively provided in multiple first heat exchanger tubes 120 and/or the second heat exchanger tube 220.
Referring to Fig. 8, Fig. 8 is 120 cross section of the first heat exchanger tube, 400 schematic diagram that the embodiments of the present invention provide.
It should be noted that the first heat exchanger tube 120 and 220 cross section of the second heat exchanger tube, 400 shape can be oblong 400a, rectangle
400b, long polygon 400c, ellipse 400d or circle 400e.
The present embodiment additionally provides a kind of water heater (not shown) including above-mentioned heat exchanger 10, and water heater includes hot water
Device ontology 111, combustion chamber and above-mentioned heat exchanger 10, combustion chamber are set in water heater body 111, mounting assembly 300 with
Combustion chamber connection.The water-heater heat-exchanging is high-efficient, and structure is simple, compact, and easy to install and use, manufacturing cost is low.
Heat exchanger 10 provided in this embodiment the utility model has the advantages that
The first heat-exchanging component 100 is arranged in heat exchanger 10 provided in this embodiment and 200 structure of the second heat-exchanging component increases
Heat exchange area guarantees heat exchange efficiency.First heat-exchanging component 100 includes the first fin 110 and the first heat exchanger tube 120, the second heat exchange
Component 200 includes the second fin 210 and the second heat exchanger tube 220；First heat exchanger tube 120 and the water inlet 340 of mounting assembly 300 connect
It connecing, the second heat exchanger tube 220 is connected to the water outlet 350 of mounting assembly 300, and the first heat exchanger tube 120 is connected to first chamber 310,
Second heat exchanger tube 220 is connected to second chamber 320, and the first heat exchanger tube 120 and the second heat exchanger tube 220 pass through third chamber
330 connections make water flow flow to third channel from first passage through third chamber 330 after the entrance of water inlet 340, thus by double
Weight heat exchange structure increases heat exchange area, guarantees heat exchange efficiency.Meanwhile 10 amount of parts of heat exchanger that embodiment provides is few,
It is easy for installation, also reduce manufacturing cost.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of heat exchanger, which is characterized in that including the first heat-exchanging component, the second heat-exchanging component and mounting assembly；
First heat-exchanging component includes the first fin and the first heat exchanger tube, and first fin and first heat exchanger tube connect
It connects, second heat-exchanging component includes the second fin and the second heat exchanger tube, and second fin is connect with second heat exchanger tube；
The mounting assembly has water inlet, water outlet, first chamber, second chamber and third chamber, the water inlet and institute
First chamber connection is stated, the water outlet is connected to the second chamber, the both ends of first heat exchanger tube and first chamber
Room is connected to form first passage, and the both ends of second heat exchanger tube are connected to form second channel with the second chamber, and described
One channel is connected to by the third chamber with the second channel.
2. heat exchanger according to claim 1, which is characterized in that the first passage and the second channel are S
Shape.
3. heat exchanger according to claim 2, which is characterized in that the mounting assembly includes installation part and baffle, institute
It states installation part and the guard seal and connects and formed between the installation part and the baffle first chamber, described the
Two chambers and the third chamber, the water inlet and the water outlet are all set in the installation part, first heat exchanger tube
It is connect with second heat exchanger tube with the baffle.
4. heat exchanger according to claim 3, which is characterized in that the installation part has the first groove, the second groove
With third groove, the installation part after being connect with the baffle first groove and the baffle form the first chamber,
Second groove and the baffle form the second chamber, and the third groove and the baffle form the third chamber
Room, the water inlet are set to first groove, and the water outlet is set to second groove.
5. heat exchanger according to claim 1, which is characterized in that first fin is multiple, first fin
It is clamped between first heat exchanger tube.
6. heat exchanger according to claim 5, which is characterized in that first fin includes ontology and interconnecting piece, institute
It states ontology and is provided with card slot, the card slot is connect with first heat exchanger tube, and the ontology is connect with one end of the interconnecting piece,
It is sequentially connected between multiple first fins by the other end of the ontology and the interconnecting piece.
7. heat exchanger according to claim 6, which is characterized in that the interconnecting piece includes first connecting portion, the second company
Socket part and multiple third interconnecting pieces, the first connecting portion are arranged around the pocket edges, and the second connecting portion is set to
The ontology both ends, the third interconnecting piece are arranged at intervals at the side that the ontology is arranged distant from the card slot.
8. heat exchanger according to claim 6, which is characterized in that the bottom setting of the card slot is jagged.
9. heat exchanger according to claim 1, which is characterized in that first heat exchanger tube and/or second heat exchange
Turbulent piece is provided in pipe.
10. a kind of water heater, which is characterized in that including water heater body, combustion chamber and such as any one of claim 1-9 institute
The heat exchanger stated, the combustion chamber are set in the water heater body, and the mounting assembly is connect with the combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821720183.4U CN209042765U (en) | 2018-10-23 | 2018-10-23 | Heat exchanger and water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821720183.4U CN209042765U (en) | 2018-10-23 | 2018-10-23 | Heat exchanger and water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209042765U true CN209042765U (en) | 2019-06-28 |
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ID=67037040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821720183.4U Active CN209042765U (en) | 2018-10-23 | 2018-10-23 | Heat exchanger and water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209042765U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297194A (en) * | 2018-10-23 | 2019-02-01 | 广东万家乐燃气具有限公司 | Heat exchanger and water heater |
-
2018
- 2018-10-23 CN CN201821720183.4U patent/CN209042765U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297194A (en) * | 2018-10-23 | 2019-02-01 | 广东万家乐燃气具有限公司 | Heat exchanger and water heater |
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