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A multi-temperature zone and large temperature cross-span heat pump circulation system using ejector efficiency

A circulating system and ejector technology, which is applied in the field of vapor compression heat pump heating, can solve the problems of lack of ejectors, and achieve the effects of avoiding irreversible losses, reducing costs, and increasing suction pressure.

Active Publication Date: 2020-12-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adoption of ejector technology in heat pumps for multi-temperature zones and large temperature span heating is still relatively lacking.

Method used

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  • A multi-temperature zone and large temperature cross-span heat pump circulation system using ejector efficiency
  • A multi-temperature zone and large temperature cross-span heat pump circulation system using ejector efficiency
  • A multi-temperature zone and large temperature cross-span heat pump circulation system using ejector efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] figure 1Shown is one implementation of the invention. In this embodiment, the compressor 101 with an intermediate air extraction function is an intermediate air extraction compressor, and its types include rolling rotor compressors, screw compressors, scroll compressors and other new compressors with an air extraction function. The intermediate air extraction port of the compressor 101 with intermediate air extraction function is connected to the inlet of the first condenser 102, and the outlet of the first condenser 102 is connected to the inlet of the high pressure side of the regenerator 104; the outlet of the high pressure side of the regenerator 104 is connected to the throttling device 105 in turn It is connected with the inlet of the first evaporator 107; the outlet of the first evaporator 107 is connected with the secondary flow inlet of the injector 106, that is, the injection fluid inlet; the high-pressure exhaust port of the compressor 101 with the intermedia...

Embodiment 2

[0031] image 3 Shown is another implementation of the invention. In this embodiment, the multi-temperature zone and large temperature span heat pump system using ejector synergy includes a first-stage series compressor 201 and a second-stage series compressor 202 arranged in series, and the exhaust port of the first-stage series compressor 201 is connected to the The inlet of the first condenser 102 is connected with the inlet of the second-stage series compressor 202, the outlet of the first condenser 102 is connected with the inlet of the high pressure side of the regenerator 104; the outlet of the high pressure side of the regenerator 104 is connected with the throttling device 105 and the first The inlet of the evaporator 107 is connected; the outlet of the first evaporator 107 is connected with the secondary flow inlet of the injector 106, that is, the injection fluid inlet; the exhaust port of the second stage series compressor 202 is connected with the inlet of the sec...

Embodiment 3

[0033] Figure 4 Shown is another implementation of the invention. In this embodiment, the multi-temperature zone and large temperature span heat pump system using ejector synergy includes a parallel low exhaust pressure compressor 301 and a second-stage parallel compressor 302, and the exhaust port of the low exhaust pressure compressor 301 is connected to the The inlet of the first condenser 102 is connected, and the outlet of the first condenser 102 is connected with the inlet of the high-pressure side of the regenerator 104; the outlet of the high-pressure side of the regenerator 104 is connected with the throttle device 105 and the inlet of the first evaporator 107 in turn; The outlet of the device 107 is connected with the secondary flow inlet of the ejector 106, that is, the injection fluid inlet; the outlet of the high discharge pressure compressor 302 is connected with the inlet of the second condenser 103; the outlet of the second condenser 103 is connected with the ...

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Abstract

The invention discloses a multi-temperature-zone large-temperature-span heat pump circulating system adopting an injector for efficiency improvement. The multi-temperature-zone large-temperature-spanheat pump circulating system comprises a compressor with a middle air extraction function, series compressors and parallel compressors; a first condenser is used for heating of a low-temperature zone,and an inlet is connected with an air extraction opening of the compressor; a second condenser is used for heating of a high-temperature zone, and an inlet is connected with an air exhaust opening ofthe compressor; a high-pressure side inlet of a reheater is connected with an outlet of the first condenser, and a high-pressure side outlet of the reheater is connected with a throttling device; aninlet of a first evaporator is connected with an outlet of the throttling device, and an outlet of the first evaporator is connected with a secondary flowing inlet of the injector; an inlet of a second evaporator is connected with an outlet of the injector, and an outlet of the second evaporator is connected with a low-pressure side inlet of the reheater; and a nozzle inlet of the injector is connected with an outlet of the second condenser, and an outlet of the injector is connected with the inlet of the second evaporator. The circulating system can effectively utilize the middle air extraction function of the compressor to achieve double condensing pressure and condensing temperature and provide double temperature zones and large-temperature-difference heat supply, irreversible losses ofheat transfer of the evaporators can be decreased, and the whole performance of the system can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of vapor compression heat pump heating, and in particular relates to a multi-temperature zone and large-temperature span heat pump circulation system using injectors to increase efficiency. [0002] technical background [0003] In recent years, with the rapid development of new technology and the continuous improvement of people's living standards, air heat pump technology has been widely used, and has achieved good energy-saving effects in the fields of air source heat pump water heaters and industrial heat pump waste heat recovery. At present, with the increasingly urgent demand for heating in different temperature zones and high water temperature, the development of multi-temperature zone heating and large temperature difference heating technology is imminent. [0004] Traditional heat pump technology usually heats the water to a high temperature first when meeting the heating requirements of different te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B9/08F25B31/00F25B40/06
CPCF25B9/08F25B31/00F25B40/06
Inventor 白涛陆宇晏刚鱼剑琳
Owner XI AN JIAOTONG UNIV
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