What does 1 horsepower of an engine mean?

[DeLeonardo]

It refers to the work of lifting a 1000-pound weight by 33 feet in 1 minute, which is the imperial horsepower, denoted by the letter HP. Horsepower: The concept of the horsepower unit was named by James Watt, the improver of the steam engine, to represent the power of the steam engine relative to the pulling power of horses. It is defined as "the power of a horse capable of pulling 33,000 pounds and moving at 1 foot per minute," and uses watts (W) or kilowatts (kW) as the standard units. The meaning of "horsepower" in air conditioning refrigeration: Originally, "horsepower" referred to the input power, including the compressor, fan motor, and electronic control parts. Due to differences in specific systems and electronic control designs among different brands, the output cooling capacity varies. Additionally, since the ideal energy efficiency ratio of air conditioners is generally around 3.0-3.6, "horsepower" has gradually become a unit of cooling capacity. For example, an input power of 1 horsepower (735W) is equivalent to a cooling capacity of 2500W, so 1 horsepower of input power is called 1 horsepower, and 2500W of cooling capacity is also called 1 horsepower.