Solution-spraying heat pump unit

Abstract

The invention discloses a solution-spraying heat pump unit and belongs to the field of refrigeration air conditioning equipment. The solution-spraying heat pump unit is characterized in that: by using solution spraying, the unit can dissipate condensation heat to the environment in summer and absorb heat from the outside air environment in winter; and a solution is regenerated by using heat released by recooling of a high-pressure liquid refrigerant. Compared with an air source heat pump unit, the solution-spraying heat pump unit has the remarkable characteristics of compact structure, low initial equipment investment, high energy efficiency ratio of refrigeration running in summer, no defrosting in winter, realization of efficient, continuous and stable heating running and the like.

Description

technical field [0001] The invention relates to a solution spraying type heat pump unit, which uses solution spraying to realize that the unit emits condensation heat to the environment in summer, and obtains heat from the outdoor air environment in winter, and is beneficial to the recooling and heating of high-pressure liquid refrigerant to regenerate the solution, belonging to In the field of refrigeration and air conditioning equipment, it is especially suitable for use in areas with low external temperature in winter. Background technique [0002] With the rapid development of social economy and the improvement of people's living standards, people's pursuit of quality of life is increasing. The energy consumption of building air-conditioning occupies a large share in the total energy consumption. According to statistics, the annual power consumption of central air-conditioning is about It accounts for about 60% of the total electricity consumption of buildings. Therefor...

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Problems solved by technology

[0003] like figure 1 The shown air source heat pump unit is currently a common cold and heat source solution for central air conditioning. However, when the air source heat pump unit is in cooling operation in summer, the energy efficiency ratio COPc of the unit is much lower than that of the water-cooled chiller unit. Under the condition that the source heat pump has a local heat island effect, the cooling energy efficiency of the air source heat pump unit is lower than that of COPc; in winter heating, due to the problem of frost on the surface of the evaporator, the frost on the surface of the evaporator reduces the energy efficiency ratio of the air source heat pump to COPh , the defrosting operation will lead to intermittent heating, affecting the comfort of the indoor environment, and reducing the safety and stability of the unit

In addition, the air source heat exchanger has a low heat transfer coefficient, large volume, and many consumables, which not only increases the initial investment of the equipment, but also puts forward higher requirements on the operating conditions such as the placement space of the unit, which limits the use of the air source heat pump unit

[0004] In order to improve the energy efficiency ratio (COPc) of the air source heat pump unit during cooling operation in summer, it has been proposed as follows: figure 2 In the scheme of evaporative cooling unit shown in the figure, during cooling in summer, the cooling energy efficiency ratio COPc of the unit is greatly improved by spraying circulating water to reduce the condensation temperature of the refrigeration cycle; Heating function in winter, since the circulating water is used to spray the air and get heat from the air in winter, when the heating operation is under low ambient temperature, the circulating water will inevitably freeze, and the heating cannot be realized

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