Abstract: With the approach of the 2022 Beijing Winter Olympics, the number of indoor ice rinks is increasing year by year, by 2017, there are 73 indoor ice rinks in Beijing. If we want to keep the ice rink in use all year round, the refrigeration equipment of the ice rink needs to keep running all year round, this leads to a huge annual consumption of electricity per ice rink.. Therefore it is necessary to reasonably design the refrigeration unit, through the application of heat recovery technology, reasonably design the operation mode, shorten the service time of the equipment, improve the service life of the equipment, reduce the power consumption and reduce the total operation cost.