Summary of contents: In recent years, China's heat pump has developed rapidly. China's heat pump has experienced rapid development and is now experiencing the "cold stream" of thinking. In the convective impact that the gratifying situation and regulatory mechanisms are not yet perfect, in the face of state subsidies, and in the face of mixed heat pump market and chaotic competition, how the relevant functional departments perform their duties, resist performance and fiscal temptation, and adhere to the principle of seeking truth from facts are the people of the industry. The focus of silent attention.

In recent years, China's heat pump has developed rapidly, mainly in the following areas:

(1) According to statistics, in 1996, the total cooling capacity of China's air-conditioning equipment (electric water chillers, absorption chillers, room air conditioners, and unit air conditioners, but not imported ones) was approximately 20 million kW. The heat pump unit's cooling capacity accounts for about 60%. In all heat pump units, the electric drive heat pump capacity is approximately 1070kW, accounting for 90%; absorption heat pump capacity is approximately 1.3 million kW, accounting for 10%.

(2) In recent years, China's absorption refrigeration equipment has developed rapidly. According to statistics, about 3,000 lithium bromide absorption refrigerating machines sold in 1996, including 1,115 direct-fired engines.

(3) The application of heat pumps in the industry has seen signs that steam injection heat pumps, absorption heat pumps, and electric drive heat pumps have been used in industrial processes such as wood, food (tea and fruit), ceramics, paper, printing, petroleum and chemical industries. . For example, about 400 heat pump wood dryers are currently in operation, with an annual processing capacity of about 200 thousand cubic meters.

All types of heat pumps have two temperature levels of evaporation and condensation, throttling using expansion valves or capillaries. However, there are different forms of pressure increase, mainly mechanical compression, heat compression, and injection vapor compression.

At present, there are three trends in the development of heat pumps in China:

â—Ž The development of air-cooled heat pump hot water units has grown rapidly. In 1996, it nearly doubled from 1995.

â—Ž The direct-fired lithium bromide chiller and hot water unit developed rapidly, accounting for 56% of all lithium bromide absorption hot water units.

â—Ž The largest proportion of room air conditioners. Heat pump type window type, split type and unit air conditioners with a capacity of 10kW or less account for 45% of total cooling capacity.

It has to be admitted that the ground-source heat pump industry in China has experienced rapid development and is now experiencing the "cold stream" of thinking. Faced with the vague pain in reality, from the government to the industry to the enterprise, every molecule needs to rethink and position itself. Delineating the source of a good future for the heat pump industry requires a concerted effort, and it requires a scientific and realistic attitude of all parties.