| 摘要: |
| 为了解决多功能空调夏季单独制热水时，室外风机频繁启停的问题，设计了一种改进的多功能空调热水器。通过改进多功能空调热水器系统的室外风冷换热器，改变了风机的输入电压和转速，调节了风冷换热器的吸热量，使其在不同季节的各种模式下，均能够高效稳定的运行。通过实验找出了压缩机和风机稳定运行的临界输出电压，得到了与节流阀各个开度相对应的系统COP。与未改造前的系统相比，多功能空调热水器系统加入了变压器之后，系统的稳定性增加。在室外环境温度为32 ℃，节流阀开度为0.4，变压器输出电压为160 V时，可达到夏季单独制热水模式的最佳工况，其COP为4.68。 |
| 关键词: 空调热水器 变风量系统 节流阀 能效比 |
| DOI： |
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| Improvement of Multi-functional Air-conditioning Water Heaters |
| Wang Haifeng,Li Yuduo,Yuan Huihui,Sun Yajuan,Zhang Shoubing,Dong Shanshan |
| (School of Chemical Engineering and Energy, Zhengzhou University) |
| Abstract: |
| An improved multi-functional air-conditioning water heater is devised to solve the problem of frequent starts and stops of fan, which always occurs while a traditional one produces hot water in summer. The improved multi-functional air-conditioning water heater can be highly efficient and stable operation in the various modes of different seasons owing to the change of input voltage and speed of fan, and improvement of the outdoor air-cooled heat exchanger. The critical output voltage for the stable operation of compressor and fan is found out, and the relationship between COP and the opening degrees of throttling valve is investigated. Compared with the system improved before, the system's stability has a great enhancement after adding a transformer in the multi-functional air-conditioning water heater. When the outdoor environment temperature is 32 ℃, the opening degree of of throttling valve is 0.4, and the output voltage of transformer is 160 V. The improved system can reach an optimum COP of 4.68 under the hot water only mode in summer. |
| Key words: air- conditioning hot water heater variable-air-volume system throttling valve energy efficiency ratio |
