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Self-overlapping low-environment-temperature air source heat pump system

An air-source heat pump and low-temperature system technology, which is applied in lighting and heating equipment, irreversible cycle compressors, refrigeration components, etc., can solve problems such as unusable, reduce the number of components, and improve energy efficiency.

Active Publication Date: 2018-09-14
陈宝山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, limited by the compressor, the limit ambient temperature of the single-stage compression refrigeration system is above -25°C, and the energy efficiency ratio (COP) under this working condition can only reach about 1.5, which is basically unusable in severe cold areas

Method used

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  • Self-overlapping low-environment-temperature air source heat pump system
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  • Self-overlapping low-environment-temperature air source heat pump system

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 1 As shown, a self-cascade low ambient temperature air source heat pump system includes a refrigerant compression system, a heating device, a low temperature system, a high temperature system, and an intermediate heat exchanger 11, a refrigerant compression system, a heating device, and a high temperature system It is connected to the intermediate heat exchanger 11 in turn to form a high-temperature refrigerant cycle system. The low-temperature refrigerant in the low-temperature system undergoes primary heat exchange through the intermediate heat exchanger 11, and then exchanges secondary heat with the air-cooled heat exchanger 15 , And merge the low-temperature refrigerant after the secondary heat exchange into the high-temperature refrigerant that has not passed through the intermediate heat exchanger 11 for a mixing cycle.

[0042] The beneficial effects of this embodiment are: the refrigerant compression system, the heating device, the high-temperature sy...

Embodiment 2

[0044] Such as figure 1 As shown, a self-cascade low ambient temperature air source heat pump system includes a refrigerant compression system, a heating device, a low temperature system, a high temperature system, and an intermediate heat exchanger 11, a refrigerant compression system, a heating device, and a high temperature system It is connected to the intermediate heat exchanger 11 in turn to form a high-temperature refrigerant cycle system. The low-temperature refrigerant in the low-temperature system undergoes primary heat exchange through the intermediate heat exchanger 11, and then exchanges secondary heat with the air-cooled heat exchanger 15 , And merge the low-temperature refrigerant after the secondary heat exchange into the high-temperature refrigerant that has not passed through the intermediate heat exchanger 11 for a mixing cycle.

[0045] It is understandable that the refrigerant compression system, the heating device, the high temperature system, and the interme...

Embodiment 3

[0062] Such as figure 2 As shown, this embodiment adds an economizer on the basis of Embodiment 2. The economizer is arranged on the pipeline connecting the main expansion valve 9 and the two-way accumulator 7. The economizer includes an economizer body 8 and an economizer expansion valve 19. , The high-temperature refrigerant separated by the first gas-liquid separator 5 is split after passing through the two-way accumulator 7: part of the high-temperature refrigerant enters the economizer body 8 for heat exchange, and then enters the main expansion valve 9 after heat exchange; another part of the high-temperature refrigerant After entering the economizer expansion valve 19, it enters the economizer body 8 for heat exchange and then enters the compressor 1, and an economizer solenoid valve 18 is installed at the entrance of the economizer expansion valve 19.

[0063] The working process of this embodiment is: when the economizer solenoid valve 18 is closed, the working process i...

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Abstract

The invention relates to a self-overlapping low-environment-temperature air source heat pump system. The system comprises a refrigerant compression system, a heat supply device, a low temperature system, a high temperature system and an intermediate heat exchanger; the refrigerant compression system, the heat supply device, the high temperature system and the intermediate heat exchanger are connected in sequence through pipelines to form a high-temperature refrigerant circulating system; a low-temperature refrigerant in the low-temperature system secondarily exchanges heat with an air coolingheat exchanger after primary heat exchange by the intermediate heat exchanger; and the low-temperature refrigerant after secondary heat exchange is gathered into a high-temperature refrigerant, not passing through the intermediate heat exchanger, for mixed circulation. The energy efficiency ratio of the air source heat pump system in low-temperature environment is improved; and the use limited environment temperature of the system is lower.

Description

Technical field [0001] The invention relates to the field of cooling and heating, in particular to a self-cascading low-ambient temperature air source heat pump system. Background technique [0002] At present, in view of the needs of environmental protection, the nationwide coal-to-electricity conversion is in full swing. The main equipment used to replace coal-fired boilers for heating is air source heat pumps. [0003] However, limited by the compressor, the limit ambient temperature of the single-stage compression refrigeration system is above -25°C, and the energy efficiency ratio (COP) under this working condition can only reach about 1.5, which is basically unavailable in severe cold areas. [0004] In the usual single-stage air source heat pump system with economizer, the national standard ambient temperature is -12°C, the water temperature is 41°C, the energy efficiency ratio is generally about 2.1, and the equipment use limit ambient temperature is -20~-25°C. At this time, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00
CPCF25B1/00F25B2400/13
Inventor 陈宝山
Owner 陈宝山
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