系统保压阀在冰箱中的应用

The application of energy valve in the refrigerator

针对某款冰箱通过冷凝器保压技术降低冰箱能耗。验证了不同环温、阀泄漏量、压缩机延迟开启时间对能耗降低程度的影响。另外在化霜前关闭电磁阀,抽取蒸发器中剩余冷媒,降低化霜能耗,优化整机能效。结果证明:1.不同环温下高压侧压力降低的幅度相近,保压阀对能耗的改善量差别不大;2.阀提前开启时间越短对降低能耗越有利;3.阀泄漏量降低增加保压阀节能效果;4.化霜时关阀抽空减小蒸发器中冷媒量,减小被冷媒吸收的热量损失,可缩短化霜时间0.5 min,使能耗改善0.4%。综合而言,以美的两门BCD360冰箱为例,增加泄漏量为0.004 L/min的保压装置,控制逻辑设置为与压缩机同步关闭,压缩机启动前2 min开启,化霜前关闭阀,压缩机运转0.5 min后,加热丝工作,耗电量减低0.0359 kW·h/24 h,相比原机能耗改善4.15%。

Focuses on a certain refrigerator to reduce the energy consumption of the refrigerator through the application of energy valve. The effects of different ambient temperatures, valve leakage, and delayed compressor opening time on the reduction of energy consumption are verified. In addition, the solenoid valve is closed before defrosting so that the remaining refrigerant in the evaporator is extracted to reduce defrosting energy consumption and optimize the energy efficiency of the whole machine. The results show that: 1. The range of pressure reduction on the high pressure side at different ambient temperatures is similar, and the improvement of energy consumption by the pressure holding valve is not much different;2. The shorter the valve opening time is, the more beneficial the energy consumption;3. The valve leakage decreases and increases The energy-saving effect of the pressure-maintaining valve;4. When defrosting, the valve is closed and evacuated to reduce the amount of refrigerant in the evaporator and reduce the heat loss absorbed by the refrigerant, which can shorten the defrosting time by 0.5 min and improve the energy consumption by 0.4%. In summary, take Midea two-door BCD360 refrigerator as an example, add energy valve with a leakage of 0.004 L/min, and the control logic is set to close synchronously with the compressor, and the compressor is opened 2 minutes before starting, and the valve is closed before defrosting, After the compressor runs for 0.5 minutes, the heating wire works, and the power consumption is reduced by 0.0359 kW·h in 24 h, which is 4.15% improvement in energy consumption compared to the original machine.