Hot-gas bypass and surface cooler supercooling defrosting device

A hot gas bypass and surface cooler technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of long defrosting operation time, low system energy efficiency, high energy consumption, and achieve fast and effective results and reduce economical costs. cost, and the effect of improving the system energy efficiency ratio

Inactive Publication Date: 2010-02-03
STARS GUANGZHOU REFRIGERATING EQUIP MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing defrosting cycle equipment, such as high energy consumption, low system energy efficiency, and long defrosting operation time, the present invention provides a system that can effectively reduce the frosting speed, improve the energy efficiency ratio of the system, save energy consumption, and reduce economic costs. Hot gas bypass and surface cooler subcooling defrosting device

Method used

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  • Hot-gas bypass and surface cooler supercooling defrosting device

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Embodiment 1

[0018] When in use, the refrigerant vapor is charged in the refrigeration cycle system. The refrigerant vapor enters the first heat exchanger 2 through the pipeline after the pressure is increased by the compressor 1, condenses the refrigerant vapor into a high-pressure liquid, and then enters the process at the bottom of the heat exchange tube in the second heat exchanger 4 through the solenoid valve 3. The heat exchange tube 41 in the cold section, because the refrigerant in the heat exchange tube 41 in the subcooling section is a medium-temperature and high-pressure liquid, the temperature of the subcooling tube is relatively high. When the ambient temperature is low and the relative humidity is high, it is effectively prevented. The condensed water produced by the heat exchange tubes in the second heat exchanger 4, especially in winter, a large amount of water droplets gather in the lower part of the evaporator to form frost on the heat exchange tubes at the bottom of the s...

Embodiment 2

[0020] When the environment needs to take heat, the electromagnetic valve 3 can be de-energized, the electromagnetic valve 6 is energized, and the heat exchange tube 42 in the upper part of the heat exchange tube in the compressor 1, the electromagnetic valve 6 and the second heat exchanger 4 is connected by a pipeline and A circuit is formed. After the refrigerant vapor is boosted by the compressor 1, the solenoid valve 6 directly enters the heat exchange tube 42 in the middle and upper part of the second heat exchanger 4 along the pipeline, and exchanges heat with the external low-temperature medium. At this time, the heat exchange tube The refrigerant in the compressor condenses into a medium-temperature liquid or a mixture of medium-temperature steam and liquid, and then returns to the compressor 1 for circulation.

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Abstract

The invention discloses a hot-gas bypass and surface cooler supercooling defrosting device, comprising a compression engine, a first heat interchanger, a first solenoid valve and a second heat interchanger which are sequentially connected by a pipeline and form a loop; wherein the heat exchange tube in the second heat interchanger is composed of a supercooling section heat exchange tube at the bottom and an upper part section heat exchange tube, and the supercooling section heat exchange tube is connected with the upper part section heat exchange tube by an expansion valve. Another solenoid valve is also connected between the compression engine and the upper part section heat exchange tube. Compared with the prior art, the invention greatly reduces frosting speed, thus the hot-gas bypass defrosting effect is more rapid and effective; besides, through the supercooling of an evaporator, system energy efficiency ratio is improved, energy consumption is saved, and economic cost is reduced.

Description

technical field [0001] The present invention relates to a refrigerating cycle equipment, more specifically, relates to a device for defrosting by using the heat contained in the refrigerant. Background technique [0002] At present, when air source heat pump water heaters used in residential or commercial buildings produce sanitary hot water, when the ambient temperature is low and the relative humidity is high, a large amount of frost will form on the finned evaporator, which will affect the heat exchange effect. In severe cases, the unit cannot operate normally. The industry adopts various defrosting methods such as hot gas bypass, four-way valve reversing, electric heating, etc. Although the existing hot gas bypass method has almost no fluctuation in the water temperature during the defrosting process, the efficiency is low ,poor effect. [0003] When the heat pump defrosts, the system uses the four-way reversing valve to switch the functions of the original evaporator a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B47/02F25B41/06F25B41/04
Inventor 袁博洪刘展东田伟
Owner STARS GUANGZHOU REFRIGERATING EQUIP MFG
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