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Single / double stage mixed composite stacking heat pump air conditioner unit

A heat pump air conditioner and unit technology, applied in heat pumps, refrigerators, compressors, etc., can solve the problem of increasing the heat transfer temperature difference between the primary and secondary heat pumps, the double-stage coupled heat pump system has a single function, and cannot be used for summer cooling operation conditions To achieve high equipment utilization, compact system structure, improve adaptability and equipment utilization

Inactive Publication Date: 2008-10-01
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the system adopts an intermediate water loop for coupling between the primary air-water heat pump system and the secondary water-air / water-water heat pump system, a water loop and a refrigeration unit are added when the system is in double-stage coupled operation. The heat exchange between the two-stage heat pumps increases the heat transfer temperature difference between the primary and secondary heat pumps, reducing the heating performance of the system; and the dual-stage coupled heat pump system has a single function and cannot be used in summer cooling operating conditions. The utilization rate is low; at the same time, due to the addition of the intermediate water loop, the system structure and operation control are more complicated

Method used

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  • Single / double stage mixed composite stacking heat pump air conditioner unit
  • Single / double stage mixed composite stacking heat pump air conditioner unit
  • Single / double stage mixed composite stacking heat pump air conditioner unit

Examples

Experimental program
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Effect test

Embodiment 1

[0014] combine figure 1 , a single / double-stage hybrid cascade heat pump air-conditioning unit of the present invention is to connect the outlet of the first-stage gas-liquid separator 6 with the suction port of the first-stage compressor 1, and the exhaust of the first-stage compressor 1 The port is connected to the intake port of the first-stage four-way reversing valve 2, the air return port of the first-stage four-way reversing valve 2 is connected to the inlet of the first-stage gas-liquid separator 6, and the first-stage four-way reversing valve The other two interfaces of 2 are respectively connected to the outlet of the outdoor heat exchanger 3 (inlet in the case of refrigeration, the following analogy) and the first interface on the second channel casing 5-8 of the three-channel casing heat exchanger 5 5-1 connection, the second interface 5-2 on the second channel casing 5-8 of the three-channel casing heat exchanger 5 is connected to the inlet (outlet) of the first-s...

Embodiment 2

[0023] combine figure 2 , another single / double-stage hybrid cascade heat pump air conditioner unit of the present invention is to connect the outlet of the first-stage gas-liquid separator 6 with the suction port of the first-stage compressor 1, and the discharge port of the first-stage compressor 1 The air port is connected to the intake port of the first-stage four-way reversing valve 2, the air return port of the first-stage four-way reversing valve 2 is connected to the inlet of the first-stage gas-liquid separator 6, and the first-stage four-way reversing valve The other two interfaces of the valve 2 are respectively connected with the outlet of the outdoor heat exchanger 3 (inlet in the case of refrigeration, the following analogy) and the first port on the second channel casing 5-8 of the three-channel casing heat exchanger 5. The interface 5-1 is connected, and the second interface 5-2 on the second channel casing 5-8 of the three-channel casing heat exchanger 5 is c...

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Abstract

The invention discloses a single / double stage mixed superposed heat pump air conditioner unit, comprising a first stage compressor, a three-way bushing heat interchanger, an first interface on a second channel bushing of which is connected with a first four-way check valve. An second interface on the second channel bushing is connected with a first stage throttle valve; the three-way bushing heat interchanger and the first stage compressor form a first stage heat pump cycle; the three-way bushing heat interchanger and the second stage compressor form a second stage heat pump cycle; the single / double stage mixed superposed heat pump air conditioner unit is capable of realizing single stage heating, double stage superposed heating and single stage refrigeration. The invention realizes superposing of the first and second stage heat pump systems, reduces a water loop in the middle when operating in the two stage superposing way and one time heat exchanging process that couples the water loop, reduces the temperature difference transfer loss between the first and the second stage heat pump systems as well as improves the heating property of the system under low temperature environment.

Description

technical field [0001] The invention belongs to air-conditioning technology, and is suitable for air-conditioning application occasions where the outdoor temperature varies widely, in particular to a single / double-stage hybrid cascade heat pump air-conditioning unit. Background technique [0002] With the development of society and the continuous improvement of people's living standards, air-conditioning is gradually popularized, and the energy consumption of air-conditioning in buildings is also increasing. The energy-saving of air-conditioning systems is becoming more and more important. Heat pump technology is recognized as an energy-saving air-conditioning method. In cold areas, air-cooled heat pumps are used for air conditioning and heating. Due to the low outdoor temperature, the evaporation temperature and evaporation pressure of the heat pump cycle are low, which leads to a high compression ratio of the traditional single-stage heat pump system. The performance drops ...

Claims

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Application Information

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IPC IPC(8): F25B13/00F25B30/02
Inventor 余延顺张少凡马娟施冠羽林元同
Owner NANJING UNIV OF SCI & TECH