Double-working-medium combined cycle heat pump device

Abstract

The invention provides a double-working-medium combined cycle heat pump device, which belongs to the technical field of refrigeration and heat pumps. The compressor is divided into two paths after being communicated with the heat supply device through a circulating working medium channel, the first path is communicated with the heat regenerator through an expansion machine, the second path is communicated with the second compressor, and after the second compressor is communicated with the heat regenerator through a circulating working medium channel, the heat regenerator is communicated with the evaporator through a condensate pipeline through a spray pipe. The evaporator communicates with the heat regenerator through a cycle working medium channel via the double-energy compressor, and the heat regenerator communicates with the compressor through a cycle working medium channel. The low-temperature compressor communicates with the low-temperature evaporator through a circulating working medium channel via the evaporator and the low-temperature throttling valve, and the low-temperature evaporator communicates with the low-temperature compressor through a circulating working medium channel. The heat supplier communicates with the outside through a heated medium channel, the low-temperature evaporator communicates with the outside through a low-temperature heat medium channel, the expansion machine is connected with the compressor and transmits power, and the double-working-medium combined cycle heat pump device is formed.

Description

Technical field: [0001] The invention belongs to the technical field of refrigeration and heat pumps. Background technique: [0002] Cold demand, heat demand, and power demand are common in human life and production; among them, the conversion of mechanical energy into heat energy is an important way to achieve refrigeration and efficient heating. In general, the temperature of the cooling medium changes during refrigeration, and the temperature of the heated medium often changes during heating; when using mechanical energy for heating, the heated medium often has dual characteristics of temperature change and high temperature at the same time, which makes the use of a single When the thermodynamic cycle realizes cooling or heating, there are problems such as unreasonable performance index, low heating parameters, high compression ratio, and too high working pressure. [0003] The vapor compression heat pump device based on the reverse Rankine cycle, when the heat release m...

AI Technical Summary

Problems solved by technology

In general, the temperature of the cooling medium changes during refrigeration, and the temperature of the heated medium often changes during heating; when using mechanical energy for heating, the heated medium often has dual characteristics of temperature change and high temperature at the same time, which makes the use of a single When the thermodynamic cycle realizes refrigeration or heating, there are problems such as unreasonable performance index, low heating parameters, high compression ratio, and too much working pressure.

[0003] The vapor compression heat pump device based on the reverse Rankine cycle, when the heat release mainly depends on the condensation process, the temperature difference loss between the working fluid and the heated medium is large, the loss of the condensate is large during the depressurization process, or the utilization cost is high; low temperature heat load The acquisition is greatly affected by the depressurization of the condensate, and the performance index needs to be improved

The gas compression heat pump device based on the reverse Brayton cycle requires a low compression ratio, which limits the improvement of heating parameters; the low temperature process is variable temperature, which makes the low temperature link often have a large temperature difference loss during cooling or heating, resulting in The performance index is unreasonable

At the same time, the adaptability of the heat pump device based on a single working fluid has certain limitations

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