Finned evaporator for carbon dioxide heat pump
A finned evaporator, carbon dioxide technology, used in evaporator/condenser, refrigeration and liquefaction, lighting and heating equipment, etc., can solve the problem of defrost water accumulation, uneven liquid separation, and unfavorable rapid dripping of defrost water. and other problems to achieve the effect of preventing freezing
Active Publication Date: 2019-07-09
北京嘉孚科技有限公司
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Problems solved by technology
The fin spacing is mostly 2.2-2.5mm. Although the dense fins are good for heat exchange, the denser fins are likely to cause ice crystals (or impurities) to adhere between the fins, and it is not conducive to the rapid dripping of defrosting water.
There are two liquid separators in the existing commonly used evaporator, which separate liquid into the fin heat exchangers on both sides, which may easily cause uneven liquid distribution on both sides.
In addition, there is generally no subcooling section in the current evaporator, which will easily cause a large amount of defrosted water to accumulate and freeze at the bottom of the heat exchanger
Method used
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Embodiment Construction
[0043] Such as figure 1 Shown is a schematic structural diagram of a finned evaporator for carbon dioxide heat pumps of the present invention, which is mainly composed of two fins, a gas collecting pipe 4 and a liquid distributor 3. The fins are composed of a fin body 1 and a coil 2, and the coil 2 is sleeved with the fin body 1, the coil 2 is directly inserted into the through hole of the fin body 1, and the gas collecting pipe 4 and the liquid distributor 3 are connected to the coil 2 through the gas collecting branch pipe 6 and the liquid distribution pipe 5 respectively .
[0044] The fin body 1 is provided with ≥4 through holes, and the coil 2 is sleeved in the through holes of the fin body 1. The fins are placed upright, and the two fins are distributed symmetrically. The optimal fin included angle 20 between the fin and the vertical direction is 15°, the fin body 1 is an aluminum fin, and the coil 2 is a copper tube.
[0045] The liquid distributor 3 uses a liquid distribut...
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The invention discloses a finned evaporator for a carbon dioxide heat pump and belongs to the technical field of energy saving. The evaporator comprises two fins, a gas collection tube and a liquid distributor, wherein each fin comprises a fin body and a coil pipe nested on the fin body; the gas collection pipe and the liquid distributor are connected with the coil pipes through gas collection branch pipes and liquid distributing pipes respectively. A supercooling section can be added to the bottom of the finned evaporator. According to the finned evaporator for the carbon dioxide heat pump, a liquid distributing head is adopted and uses a mixed orifice; the supercooling section is adopted at the bottom, a one-in and one-out structure is adopted, icing is prevented, excessive heat loss is avoided, two phases are uniformly mixed, and the uniformity of each way is guaranteed.
Description
Technical field [0001] The invention relates to a fin type evaporator, in particular to a fin type evaporator for a carbon dioxide heat pump, belonging to the technical field of energy-saving energy. Background technique [0002] In recent years, many domestic and foreign research institutions and universities have developed prototypes of carbon dioxide heat pump water heaters and conducted corresponding experimental studies. From the published literature, it can be known that the carbon dioxide heat pump water heaters studied abroad are mostly air sources, and the type is finned tube type. [0003] The domestic transcritical carbon dioxide heat pump water heaters sold by Japanese companies such as Sanyo, Panasonic, and Daikin on the domestic market use this form. [0004] The current research is mainly focused on gas coolers, and there are few researches on evaporators. Due to the limitations of processing conditions and processing costs, the prototypes developed by some domestic ...
Claims
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IPC IPC(8): F25B39/02
CPCF25B39/02F25B2339/0242
Inventor 陶杰李琢李博郭宏
Owner 北京嘉孚科技有限公司