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Two-stage compression heat pump system

A two-stage compression and heat pump system technology, applied to compressors, compressors with reversible cycles, lighting and heating equipment, etc., can solve the problems that compressors cannot be used at the same time, and the initial investment of the system is high, so as to achieve small temperature difference fluctuation control , Improve system efficiency, the effect of small initial investment

Inactive Publication Date: 2011-04-27
周丹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the multi-head method in the prior art adopts the variable refrigerant flow method to ensure a suitable compression ratio and a suitable cylinder volume ratio, the compressor form is fixed. When used as an air conditioner in summer, the high-pressure stage and low-pressure stage compressors cannot be used at the same time. , the initial investment of the system is higher

Method used

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Examples

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Effect test

Embodiment 1

[0022] figure 1It is a schematic diagram of a two-stage compression heat pump system with one-stage throttling and incomplete cooling in the middle of the present invention, including multiple sets of compressor units, a first heat exchanger 4, a second heat exchanger 8, and an intercooler 5. The intercooler is a shell Tube heat exchanger or plate heat exchanger. Each group of compressors includes compressor 1, four-way reversing valve 2, first solenoid valve 3-1, second solenoid valve 3-2, third solenoid valve 3-3, fourth solenoid valve 3-4, compressor The exhaust end of compressor 1 is respectively connected with the first electromagnetic valve 3-1 and the second electromagnetic valve 3-2, and the suction end of compressor 1 is respectively connected with the third electromagnetic valve 3-3 and the fourth electromagnetic valve 3-4, The first solenoid valve 3-1 of each group of compressors is connected to the fourth interface 2-4 of the four-way reversing valve 2, the second...

Embodiment 2

[0033] figure 2 It is a schematic diagram of another two-stage compression heat pump system with one-stage throttling and incomplete cooling in the middle, except that the connection mode of the second throttling valve is different, and the other structures are the same as in Embodiment 1. It includes multiple sets of compressor units, a first heat exchanger 4, a second heat exchanger 8, and an intercooler 5, and the intercooler is a shell-and-tube heat exchanger or a plate heat exchanger. Each group of compressors includes compressor 1, four-way reversing valve 2, first solenoid valve 3-1, second solenoid valve 3-2, third solenoid valve 3-3, fourth solenoid valve 3-4, compressor The exhaust end of compressor 1 is respectively connected with the first electromagnetic valve 3-1 and the second electromagnetic valve 3-2, and the suction end of compressor 1 is respectively connected with the third electromagnetic valve 3-3 and the fourth electromagnetic valve 3-4, The first sole...

Embodiment 3

[0044] image 3 Schematic diagram of a two-stage compression heat pump system with one-stage throttling and complete cooling in the middle, including multiple sets of compressor units, the first heat exchanger 4, the second heat exchanger 8, and the intercooler 5. The intercooler is equipped with a liquid level shell and tube heat exchanger. Each group of compressors includes compressor 1, four-way reversing valve 2, first solenoid valve 3-1, second solenoid valve 3-2, third solenoid valve 3-3, fourth solenoid valve 3-4, compressor The suction end of 1 is respectively connected with the third electromagnetic valve 3-3 and the fourth electromagnetic valve 3-4, and the first electromagnetic valve 3-1 of each compressor group is connected with the fourth interface 2-4 of the four-way reversing valve 2 connection, the second solenoid valve 3-2 is connected in parallel with the shell side inlet below the liquid surface of the intercooler 5, the third solenoid valve 3-3 is connecte...

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Abstract

The invention discloses a two-stage compression heat pump system, aiming at providing the two-stage compression heat pump system easy for energy adjustment. The two-stage compression heat pump system can realize the mutual conversion between a high-pressure state compressor and a low-pressure stage compressor and improve the efficiency of a heat pump system. Meanwhile, all compressors can be put into use to improve the refrigerating capacity in summer when the heat pump system is used as an air conditioner in summer. The two-stage compression heat pump system comprises multiple groups of compressor units, a first heat exchanger, a second heat exchanger and an intermediate cooler, wherein each group of compressor unit comprises a compressor, a four-way reverse valve, a first solenoid valve, a second solenoid valve, a third solenoid valve and a fourth solenoid valve; the exhaust ends of the compressors are respectively connected with the first solenoid valve and the second solenoid valve; the air sucking ends of the compressors are respectively connected with the third solenoid valve and the fourth solenoid valve; and the interchange between the high-pressure stage and the low-pressure stage can be realized by opening or closing the solenoid valves connected to various compressors. The efficiency of the system can be improved by adjusting the flow of a refrigerator during two-stage compressor refrigeration circulation and two-stage compression heat pump circulation.

Description

technical field [0001] The present invention relates to a heat pump circulation system, more specifically, to a multi-head system capable of realizing both single-stage and double-stage compression refrigeration cycles and single-stage and double-stage compression heat pump cycles. When using stage compression refrigeration and heat pump cycles, the energy efficiency ratio of the system can be improved. Background technique [0002] The on-line heat pump heating system is used for heating in winter, and has the advantages of simple system and no need for personnel. However, when the difference between the evaporation temperature and the condensation temperature is large, the efficiency of the multi-connected heat pump compressor is extremely low due to the large compression ratio, so a two-stage compression heat pump system should be used. The two-stage compression heat pump system in the prior art has two modes: single head and multi-head. In the single head, the intermedi...

Claims

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Application Information

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IPC IPC(8): F25B13/00F25B41/04F25B41/06
Inventor 杨永安马晨李砚明吕正刚陆佩强毛力董小勇严雷叶庆银
Owner 周丹
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