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Energy-saving defrosting air source heat pump system

An air source heat pump and heat storage technology, applied in the field of heat pump systems, can solve problems such as affecting the safe operation of compressors, affecting indoor comfort, leakage of four-way reversing valves, etc., so as to reduce the possibility of airflow noise and leakage, The effect of improved energy utilization efficiency and safe and reliable work

Inactive Publication Date: 2013-10-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing air source heat pump adopts reverse cycle defrosting, which affects the indoor comfort and causes the leakage of the four-way reversing valve when the four-way reversing valve is reversing, which leads to a decrease in system performance and affects the work of the heat pump. , and the use of hot gas bypass defrosting has the problem of long defrosting time, which affects the safe operation of the compressor, and then provides an energy-saving defrosting air source heat pump system

Method used

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specific Embodiment approach 1

[0008] Specific implementation mode one: combine Figure 1-Figure 3 Describe this embodiment. An energy-saving defrosting air source heat pump system in this embodiment includes a compressor 1, a four-way reversing valve 2, an indoor unit 3, a filter 4, a first throttling device 5, an outdoor unit 6, an air The liquid separator 7 and the second throttling device 10, the outlet of the compressor 1 communicates with the four-way reversing valve 2, the four-way reversing valve 2 communicates with the indoor unit 3 and the outdoor unit 4 respectively, and the indoor unit 2 communicates with the filter 4 The filter 4 communicates with the first throttling device 5, the first throttling device 5 communicates with the outdoor unit 6, the outlet of the gas-liquid separator 7 communicates with the inlet of the compressor 1, and the system also includes heat storage and heat exchange 11, the first solenoid valve 8 and the second solenoid valve 9, the heat storage heat exchanger 11 inclu...

specific Embodiment approach 2

[0013] Specific implementation mode two: combination figure 1 and figure 2 To describe this embodiment, the phase change material described in this embodiment is paraffin. With such settings, paraffin is a good heat storage material, with a phase transition temperature of about 20°C and a specific heat capacity of 2.14-2.9J·g -1 ·K -1 , the latent heat of phase change is 200~220J·g -1 , heat storage effect is good, to meet the actual needs. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Specific implementation mode three: combination figure 1 and figure 2 To illustrate this embodiment, the phase change material described in this embodiment is polyethylene glycol. If set in this way, the heat storage effect is good. The polyethylene glycol of this embodiment is preferably polyethylene glycol 400 and polyethylene glycol 600. The phase transition temperature of polyethylene glycol 400 is about 5°C, and the latent heat of phase transition is 99J g -1 ; The phase transition temperature of polyethylene glycol 600 is about 20°C, and the latent heat of phase transition is 127J·g -1 , heat storage effect is good, to meet the actual needs. Others are the same as in the first embodiment.

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Abstract

The invention discloses an energy-saving defrosting air source heat pump system, relates to a heat pump system, and solves the problems that the existing air source heat pump adopts reverse cycle to defrost so as to influence indoor comfort, when a four-way reversing valve reverses, the four-way reversing valve leaks, so that the property of the system is reduced, the safety operation of the heat pump is influenced, hot-gas bypass is adopted to defrost, the defrosting time is long, and the safe operation of a compressor is influenced. The energy-saving defrosting air source heat pump system comprises a compressor, a four-way reversing valve, an indoor machine, a filter, a first throttling device, an outdoor machine, a gas-liquid separator and a second throttling device, wherein the outlet of the compressor is communicated with the four-way reversing valve, and the four-way reversing valve is respectively communicated with the indoor machine and the outdoor machine; the energy-saving defrosting air source heat pump system comprises a thermal storage heat exchanger, a first magnetic valve, a second magnetic valve, wherein the thermal storage heat exchanger comprises a thermal storage sleeve, a heat exchanging pipe and a phase-change material, the inner surface of the thermal storage sleeve is covered on the compressor, and the four-way reversing valve is connected with the first magnetic valve and the second magnetic valve. The energy-saving defrosting air source heat pump system provided by the invention is used for defrosting the air source heat pump system.

Description

technical field [0001] The invention relates to a heat pump system, in particular to an energy-saving defrosting air source heat pump system. Background technique [0002] When the air source heat pump is running in winter, frost will form on the outdoor unit of the air-cooled heat pump unit. When the frost layer accumulates to a certain extent, the heating capacity will be significantly attenuated, and defrosting must be carried out. The commonly used defrosting methods mainly include reverse cycle defrosting and hot gas bypass defrosting. [0003] Reverse cycle defrosting is the most common defrosting method. However, this defrosting method has many disadvantages: 1. When defrosting, it needs to absorb heat from the room, and the room temperature will drop by 5-6°C, which will affect the comfort of the room; 2. When switching between heating and defrosting modes, the system pressure fluctuates violently. The mechanical impact generated is relatively large; 3. The indoor ...

Claims

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Application Information

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IPC IPC(8): F25B47/02F25B29/00
Inventor 董建锴姜益强张龙田浩
Owner HARBIN INST OF TECH
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