CN103375913B - Teat pump boiler - Google Patents
Teat pump boiler Download PDFInfo
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- CN103375913B CN103375913B CN201210107201.2A CN201210107201A CN103375913B CN 103375913 B CN103375913 B CN 103375913B CN 201210107201 A CN201210107201 A CN 201210107201A CN 103375913 B CN103375913 B CN 103375913B
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- heat exchange
- inlet tube
- outlet
- pump boiler
- teat pump
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 238000003287 bathing Methods 0.000 abstract description 5
- 230000032798 delamination Effects 0.000 abstract description 4
- 230000002708 enhancing Effects 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000003068 static Effects 0.000 description 1
Abstract
The invention provides a kind of Teat pump boiler.According to Teat pump boiler of the present invention, comprise liner for water tank of water heater and the first heat exchange coil being arranged on liner for water tank of water heater outside, also comprise: the second heat exchange coil, arrange with fitting with the bottom of liner for water tank of water heater.By being arranged on the second heat exchange coil of bottom, the outer disk solving existing Teat pump boiler declines the problem of the water tank water temperature severe delamination that channel heat exchanger exists, cold and hot distribution inequality, enhance the heat exchange of water tank bottom and heat pump, improve the heat exchange efficiency of Teat pump boiler, substantially increase the comfortableness of user's bathing simultaneously.
Description
Technical field
The present invention relates to field of water heaters, especially, relate to a kind of Teat pump boiler.
Background technology
Whether directly contact with condenser according to by the water heated, coil type heat pump water heater is divided into interior disc type and outer disc type.Because existing interior disc type Teat pump boiler exists corrosion resistance difference, the shortcomings such as the life-span is short, the outer disc type Teat pump boiler thus with advantages such as corrosion resistance are good, pollution-free has now become a kind of development trend.
At present, outer disc type Teat pump boiler generally adopts low, the expensive copper pipe outer disk of heat transfer efficiency, but micro-channel heat exchanger is as the heat exchanger of a kind of efficient, material-saving, environmental protection, light weight, progressively obtains and apply more and more widely in heat pump hot-water system.During the heating of coiled cistern static, owing to not having extrinsic power, flowing comes from by the variable density of water after coil pipe heating completely, the free convection occurred under gravitational field effect.After water is heated, density reduces, and therefore hot water is at water tank upper, cold water bottom.
The existing outer disc type Teat pump boiler with micro-channel heat exchanger is just provided with heat exchange coil at middle part, causes the obviously layering up and down of water tank water temperature, greatly reduces the comfortableness of user's bathing while adding Systematical control difficulty.
Summary of the invention
The object of the invention is to provide a kind of Teat pump boiler, to be heated up and down uneven technical problem to solve outer disc type Teat pump boiler water temperature.
For achieving the above object, the invention provides a kind of Teat pump boiler, comprise liner for water tank of water heater and the first heat exchange coil being arranged on liner for water tank of water heater outside, also comprise: the second heat exchange coil, arrange with fitting with the bottom of liner for water tank of water heater.
Further, Teat pump boiler also comprises the bracket for fixing the second heat exchange coil, and shell or the liner for water tank of water heater of bracket and Teat pump boiler are removably connected.
Further, the bottom of liner for water tank of water heater is convex, the second heat exchange coil comprise many that be arranged side by side with liner for water tank of water heater bottom the circular arc coil pipe that fits.
Further, circular arc coil pipe is mini-channel flat pipe.
Further, the second heat exchange coil comprises circular arc header, and circular arc header is connected with circular arc coil pipe.
Further, many circular arc coil lengths are not etc.
Further, the bottom of liner for water tank of water heater is convex, the second heat exchange coil be with liner for water tank of water heater bottom the helical coiled tube that fits.
Further, Teat pump boiler comprises working medium inlet tube and sender property outlet pipe, and working medium inlet tube and sender property outlet pipe are located at bottom or the sidepiece of Teat pump boiler.
Further, first heat exchange coil comprises the first inlet tube and the first outlet, second heat exchange coil comprises the second inlet tube and the second outlet, and the first inlet tube is connected with working medium inlet tube respectively with the second inlet tube, and the first outlet is connected with sender property outlet pipe respectively with the second outlet.
Further, first heat exchange coil comprises the first inlet tube and the first outlet, and the second heat exchange coil comprises the second inlet tube and the second outlet, and the first inlet tube is connected with working medium inlet tube, first outlet is connected with the second inlet tube, and the second outlet is connected with sender property outlet pipe.
Further, first heat exchange coil comprises the first inlet tube and the first outlet, and the second heat exchange coil comprises the second inlet tube and the second outlet, and the second inlet tube is connected with working medium inlet tube, second outlet is connected with the first inlet tube, and the first outlet is connected with sender property outlet pipe.
The present invention has following beneficial effect:
By being arranged on the second heat exchange coil of bottom, the outer disk solving existing Teat pump boiler declines the problem of the water tank water temperature severe delamination that channel heat exchanger exists, cold and hot distribution inequality, enhance the heat exchange of water tank bottom and heat pump, improve the heat exchange efficiency of Teat pump boiler, substantially increase the comfortableness of user's bathing simultaneously.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the overall schematic according to Teat pump boiler of the present invention;
Fig. 2 is according to elevational schematic view during Teat pump boiler installation mini-channel flat pipe of the present invention;
Fig. 3 is according to elevational schematic view during Teat pump boiler installation helical coiled tube of the present invention; And
Fig. 4 is the bracket schematic diagram according to Teat pump boiler of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
See Fig. 1 to Fig. 3, according to Teat pump boiler of the present invention, comprise liner for water tank of water heater 10 and the first heat exchange coil 20 being arranged on liner for water tank of water heater 10 outside, also comprise: the second heat exchange coil 30, is arranged with the bottom of liner for water tank of water heater 10 with fitting.By being arranged on the second heat exchange coil 30 of bottom, the outer disk solving existing Teat pump boiler declines the problem of the water tank water temperature severe delamination that channel heat exchanger exists, cold and hot distribution inequality, enhance the heat exchange of water tank bottom and heat pump, improve the heat exchange efficiency of Teat pump boiler, substantially increase the comfortableness of user's bathing simultaneously.
See Fig. 2 to Fig. 4, Teat pump boiler also comprises the bracket 40 for fixing the second heat exchange coil 30, and shell or the liner for water tank of water heater 10 of bracket 40 and Teat pump boiler are removably connected.Bracket 40 is connected by the shell of screw and Teat pump boiler or liner for water tank of water heater 10, and bracket 40 ensures that the second heat exchange coil 30 is better fitted with liner for water tank of water heater 10.
See Fig. 2, according to the first embodiment of the second heat exchange coil 30 of the present invention, the bottom of liner for water tank of water heater 10 is convex, the second heat exchange coil 30 comprise many that be arranged side by side with liner for water tank of water heater 10 bottom the circular arc coil pipe that fits.Circular arc coil pipe is micro-channel flat.Second heat exchange coil 30 comprises circular arc header 52, circular arc header 52 is connected with circular arc coil pipe, many circular arc coil lengths are not etc., the coil pipe of every root circular arc be all with liner for water tank of water heater 10 bottom arcwall face match, then every root circular arc coil pipe is arranged side by side, port is connected with circular arc header 52, form overall heat exchange coil, then fitted by bracket 40 and liner for water tank of water heater 10, copper pipe is flat copper tube or aluminum pipe, the flat horizontal surface of flat tube contributes to coil pipe and liner for water tank of water heater 10 is better fitted, improve heat exchange efficiency.
See Fig. 3, according to the second embodiment of the second heat exchange coil 30 of the present invention, the bottom of liner for water tank of water heater 10 is convex, the second heat exchange coil 30 also can be with liner for water tank of water heater 10 bottom the helical coiled tube that fits.The cross section of helical coiled tube is circular.Helical coiled tube is a spiral cross section is round copper pipe, is fitted by bracket 40 and liner for water tank of water heater 10.
See Fig. 1 to Fig. 3, Teat pump boiler comprises working medium inlet tube 11 and sender property outlet pipe 12, and working medium inlet tube 11 and sender property outlet pipe 12 are located at bottom or the sidepiece of Teat pump boiler.
According to the first embodiment that working medium pipeline of the present invention connects, first heat exchange coil 20 is connected with working medium inlet tube 11 with after the inlet tube parallel connection of the second heat exchange coil 30, and the first heat exchange coil 20 is connected with sender property outlet pipe 12 with after the outlet parallel connection of the second heat exchange coil 30.
Concrete connected mode is that the first heat exchange coil 20 comprises the first inlet tube 21 and the first outlet 22, second heat exchange coil 30 comprises the second inlet tube 31 and the second outlet 32, first inlet tube 21 is connected with working medium inlet tube 11 respectively with the second inlet tube 31, and the first outlet 22 is connected with sender property outlet pipe 12 respectively with the second outlet 32.
Working medium pipeline according to the present invention connects the second embodiment, and the first heat exchange coil 20 is connected with sender property outlet pipe 12 with working medium inlet tube 11 after connecting with the second heat exchange coil 30.
The first connected mode of second embodiment is that the first heat exchange coil 20 comprises the first inlet tube 21 and the first outlet 22, second heat exchange coil 30 comprises the second inlet tube 31 and the second outlet 32, first inlet tube 21 is connected with working medium inlet tube 11, first outlet 22 is connected with the second inlet tube 31, and the second outlet 32 is connected with sender property outlet pipe 12.
The second connected mode of the second embodiment is that the first heat exchange coil 20 comprises the first inlet tube 21 and the first outlet 22, second heat exchange coil 30 comprises the second inlet tube 31 and the second outlet 32, second inlet tube 31 is connected with working medium inlet tube 11, second outlet 32 is connected with the first inlet tube 21, and the first outlet 22 is connected with sender property outlet pipe 12.
See Fig. 1, one or more dividing plate 60 is also wrapped according to Teat pump boiler of the present invention, header 51 is divided into the first header and the second header, and dividing plate 60 is arranged in the first header and/or the second header, and the first header and/or the second header are separated into different pipeline sections.Dividing plate 60 takes blocking effect, and forms the heat exchange process that the identical or cross section of two or more flow areas reduces gradually, and to improve the heat exchange efficiency of working medium and water, working medium is water in heat exchanger coils or other heating agents.
When the quantity of dividing plate 60 is odd number, the first header or the second header are provided with the first inlet tube 21 and the first outlet 22, and heat exchanger is connected with the circulation line of water heater with the first outlet 22 by the first inlet tube 21.When the number of dividing plate 60 is odd number, whole heat exchanger is divided into even number heat exchange process by dividing plate 60, the first inlet tube 21 and the first outlet 22 is arranged on same header and ensures that all heat exchanger channels 13 are connected with circulation line.
When the quantity of dividing plate 60 is even number, first header is provided with the first inlet tube 21 or the first outlet 22, second header is provided with the first outlet 22 or the first inlet tube 21, heat exchanger is connected with the circulation line of water heater with the first outlet 22 by the first inlet tube 21, when the number of dividing plate 60 is even number, whole heat exchanger is divided into odd number heat exchange process by dividing plate 60, the first inlet tube 21 and the first outlet 22 is arranged on different headers and ensures that all heat exchanger channels 13 are connected with circulation line.
Inlet tube and the outlet of the working medium of the first heat exchange coil 20 and the second heat exchange coil 30 can be exchanged mutually as the case may be.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
By being arranged on the second heat exchange coil of bottom, the outer disk solving existing Teat pump boiler declines the problem of the water tank water temperature severe delamination that channel heat exchanger exists, cold and hot distribution inequality, enhance the heat exchange of water tank bottom and heat pump, improve the heat exchange efficiency of Teat pump boiler, substantially increase the comfortableness of user's bathing simultaneously.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a Teat pump boiler, comprises liner for water tank of water heater (10) and is arranged on outside the first heat exchange coil (20) of described liner for water tank of water heater (10), it is characterized in that, also comprise:
Second heat exchange coil (30), is arranged with the bottom of described liner for water tank of water heater (10) with fitting;
The bottom of described liner for water tank of water heater (10) is convex, and described second heat exchange coil (30) comprises the circular arc coil pipe that many that be arranged side by side and described liner for water tank of water heater (10) bottoms fit.
2. Teat pump boiler according to claim 1, it is characterized in that, also comprise the bracket (40) for fixing described second heat exchange coil (30), shell or the described liner for water tank of water heater (10) of described bracket (40) and described Teat pump boiler are removably connected.
3. Teat pump boiler according to claim 1, is characterized in that, described circular arc coil pipe is mini-channel flat pipe.
4. Teat pump boiler according to claim 1, is characterized in that, described second heat exchange coil (30) comprises circular arc header (52), and described circular arc header (52) is connected with described circular arc coil pipe.
5. Teat pump boiler according to claim 1, is characterized in that, many described circular arc coil lengths are not etc.
6. Teat pump boiler according to claim 1, it is characterized in that, described Teat pump boiler comprises working medium inlet tube (11) and sender property outlet pipe (12), and described working medium inlet tube (11) and described sender property outlet pipe (12) are located at bottom or the sidepiece of described Teat pump boiler.
7. Teat pump boiler according to claim 6, it is characterized in that, described first heat exchange coil (20) comprises the first inlet tube (21) and the first outlet (22), described second heat exchange coil (30) comprises the second inlet tube (31) and the second outlet (32), described first inlet tube (21) is connected with described working medium inlet tube (11) respectively with described second inlet tube (31), and described first outlet (22) and the second outlet (32) are connected with described sender property outlet pipe (12) respectively.
8. Teat pump boiler according to claim 6, it is characterized in that, described first heat exchange coil (20) comprises the first inlet tube (21) and the first outlet (22), described second heat exchange coil (30) comprises the second inlet tube (31) and the second outlet (32), described first inlet tube (21) is connected with described working medium inlet tube (11), described first outlet (22) is connected with described second inlet tube (31), and described second outlet (32) is connected with described sender property outlet pipe (12).
9. Teat pump boiler according to claim 6, it is characterized in that, described first heat exchange coil (20) comprises the first inlet tube (21) and the first outlet (22), described second heat exchange coil (30) comprises the second inlet tube (31) and the second outlet (32), described second inlet tube (31) is connected with described working medium inlet tube (11), described second outlet (32) is connected with described first inlet tube (21), and described first outlet (22) is connected with described sender property outlet pipe (12).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201210107201.2A CN103375913B (en) | 2012-04-12 | 2012-04-12 | Teat pump boiler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210107201.2A CN103375913B (en) | 2012-04-12 | 2012-04-12 | Teat pump boiler |
Publications (2)
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CN103375913A CN103375913A (en) | 2013-10-30 |
CN103375913B true CN103375913B (en) | 2015-10-28 |
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CN201210107201.2A Active CN103375913B (en) | 2012-04-12 | 2012-04-12 | Teat pump boiler |
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Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106225325A (en) * | 2016-08-21 | 2016-12-14 | 吴亚妹 | A kind of heat exchanger used for water heater and water heater |
CN109489253B (en) * | 2017-09-12 | 2021-04-20 | 浙江盾安机械有限公司 | Bottom heat exchanger and heat pump water heater |
CN108895664B (en) * | 2018-08-27 | 2020-10-09 | 广东芬尼科技股份有限公司 | Horizontal wall-hung small-sized intelligent heat pump water heater |
CN110906546A (en) * | 2019-10-29 | 2020-03-24 | 青岛海尔新能源电器有限公司 | Heat pump water heater |
CN110906588A (en) * | 2019-10-29 | 2020-03-24 | 青岛海尔新能源电器有限公司 | Micro-channel heat exchanger, heat pump water heater and control method thereof |
CN110906590A (en) * | 2019-10-29 | 2020-03-24 | 青岛海尔新能源电器有限公司 | Combined heat exchanger assembly for heat pump and heat pump water heater |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1191297A (en) * | 1997-01-24 | 1998-08-26 | 穆丹制造公司 | Evaporator/condenser for heat pump |
JP2002340439A (en) * | 2001-05-17 | 2002-11-27 | Denso Corp | Heat pump type hot-water supplier |
CN2901152Y (en) * | 2006-05-25 | 2007-05-16 | 宋德华 | Heater for water storage type electric water heater |
CN101482325A (en) * | 2009-01-14 | 2009-07-15 | 广东美的电器股份有限公司 | Mounting method for water tank and heating coil pipe of heat pump water heater |
CN201314702Y (en) * | 2008-11-13 | 2009-09-23 | 宁波德贝里克电器有限公司 | Water tank liner of water heater |
CN101629757A (en) * | 2009-08-10 | 2010-01-20 | 黄明佳 | Liner wall heat exchange type water tank |
CN201429345Y (en) * | 2009-04-03 | 2010-03-24 | 陈苏红 | Parallel-flow heat exchanger of central air conditioner |
CN201724388U (en) * | 2010-04-08 | 2011-01-26 | 张茂勇 | Heat pump water heating device employing micro-channel parallel flow falling film condenser |
CN102022831A (en) * | 2009-09-21 | 2011-04-20 | 乐金电子(天津)电器有限公司 | Energy-saving water tank of heat pump water heater |
CN102062473A (en) * | 2010-06-24 | 2011-05-18 | 艾欧史密斯(中国)热水器有限公司 | Composite heat exchange water storage type heat pump water heater |
CN102367991A (en) * | 2011-09-02 | 2012-03-07 | 海尔集团公司 | Heat pump water heater water tank |
CN202501623U (en) * | 2012-04-12 | 2012-10-24 | 珠海格力电器股份有限公司 | Heat pump water heater |
-
2012
- 2012-04-12 CN CN201210107201.2A patent/CN103375913B/en active Active
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1191297A (en) * | 1997-01-24 | 1998-08-26 | 穆丹制造公司 | Evaporator/condenser for heat pump |
JP2002340439A (en) * | 2001-05-17 | 2002-11-27 | Denso Corp | Heat pump type hot-water supplier |
CN2901152Y (en) * | 2006-05-25 | 2007-05-16 | 宋德华 | Heater for water storage type electric water heater |
CN201314702Y (en) * | 2008-11-13 | 2009-09-23 | 宁波德贝里克电器有限公司 | Water tank liner of water heater |
CN101482325A (en) * | 2009-01-14 | 2009-07-15 | 广东美的电器股份有限公司 | Mounting method for water tank and heating coil pipe of heat pump water heater |
CN201429345Y (en) * | 2009-04-03 | 2010-03-24 | 陈苏红 | Parallel-flow heat exchanger of central air conditioner |
CN101629757A (en) * | 2009-08-10 | 2010-01-20 | 黄明佳 | Liner wall heat exchange type water tank |
CN102022831A (en) * | 2009-09-21 | 2011-04-20 | 乐金电子(天津)电器有限公司 | Energy-saving water tank of heat pump water heater |
CN201724388U (en) * | 2010-04-08 | 2011-01-26 | 张茂勇 | Heat pump water heating device employing micro-channel parallel flow falling film condenser |
CN102062473A (en) * | 2010-06-24 | 2011-05-18 | 艾欧史密斯(中国)热水器有限公司 | Composite heat exchange water storage type heat pump water heater |
CN102367991A (en) * | 2011-09-02 | 2012-03-07 | 海尔集团公司 | Heat pump water heater water tank |
CN202501623U (en) * | 2012-04-12 | 2012-10-24 | 珠海格力电器股份有限公司 | Heat pump water heater |
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