CN108662809B

CN108662809B - Double-working medium combined cycle compression heat pump

Info

Publication number: CN108662809B
Application number: CN201810211501.2A
Authority: CN
Inventors: 李华玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-03-30
Filing date: 2018-03-10
Publication date: 2020-07-28
Anticipated expiration: 2038-03-10
Also published as: CN108662809A

Abstract

The invention provides a double-working-medium combined cycle compression heat pump, belonging to the technical field of energy power and heat pumps. The heat supply device is communicated with the mixing evaporator through a circulating pump, the expansion machine is communicated with the mixing evaporator through a medium temperature evaporator, the mixing evaporator is respectively communicated with the compressor and the second expansion machine, the compressor is communicated with the expansion machine through a high temperature heat exchanger, the heat supply device is communicated with the medium temperature evaporator through a second circulating pump, the medium temperature evaporator is communicated with the third expansion machine, and the second expansion machine and the third expansion machine are communicated with the heat supply device; the second compressor is communicated with a second heat supply device, the second heat supply device is communicated with the evaporator through the throttle valve, and the evaporator is communicated with the second compressor; the high-temperature heat exchanger and the medium-temperature evaporator are provided with heat source medium channels, the heat supply device and the second heat supply device are provided with heated medium channels, the evaporator is provided with low-temperature heat medium channels which are respectively communicated with the outside, and the expander, the second expander and the third expander are connected with the compressor and the second compressor and transmit power to form a double-working-medium combined cycle heat pump compression type.

Description

Double-working medium combined cycle compression heat pump

The technical field is as follows:

the invention belongs to the technical field of energy power and heat pumps.

Background art:

cold demand, heat demand and power demand, which are common in human life and production; in reality, people often need to use high-temperature heat energy to realize refrigeration, heat supply or power conversion, and also need to use power to refrigerate or use power and combine low-temperature heat energy to supply heat. In achieving the above objects, various considerations or conditional limitations are faced, including the type, grade and quantity of energy sources, the type, grade and quantity of user demands, ambient temperature, the type of working medium, the flow, structure and manufacturing cost of the equipment, and so on.

In the technical field of refrigeration or heating, the utilization of temperature difference by utilizing a phase-change medium is a common technical means, has a plurality of advantages, and has defects, particularly the problems of insufficient temperature difference utilization, low performance index or overhigh operating pressure and the like caused by non-high-quality fuel, high temperature and variable temperature heat sources; in actual needs, it is also considered to supply power to the outside while heating or cooling, to realize effective utilization of mechanical energy during cooling/heating, and to adapt to the range of input energy, low-temperature medium, and heating needs.

The invention aims at realizing refrigeration/heating by using non-high-quality fuel and a high-temperature or variable-temperature heat source, and considering the requirements of effective utilization of mechanical energy or power output, and provides the dual-working-medium combined cycle compression heat pump which can keep the advantages of a phase-change medium, runs at low pressure, fully utilizes temperature difference, has a reasonable structure, utilizes resources reasonably, has a wide working parameter range and has a wider application range.

The invention content is as follows:

the invention mainly aims to provide a double-working-medium combined cycle compression heat pump, and the specific contents of the invention are explained in different terms as follows:

1. the double-working medium combined cycle compression heat pump mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supplier, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander and a second heat supplier; the heat supplier has condensed liquid pipeline connected via circulating pump to the mixing evaporator, the expander has steam passage connected via the medium temperature evaporator to the mixing evaporator, the mixing evaporator has also steam passage connected to the compressor and the second expander separately, the compressor has also steam passage connected via the high temperature heat exchanger to the expander, and the second expander has also steam passage connected to the heat supplier; the heat supply device is also provided with a condensate pipeline which is communicated with the medium temperature evaporator through a second circulating pump, then the medium temperature evaporator is provided with a steam channel which is communicated with a third expander, and the third expander is also provided with a steam channel which is communicated with the heat supply device; the external part is provided with a low-temperature heat medium channel which is communicated with a second compressor, the second compressor is also provided with a low-temperature heat medium channel which is communicated with a fourth expander through a second heat supply device, and the fourth expander is also provided with a low-temperature heat medium channel which is communicated with the external part; the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the heat supply device and the second heat supply device are also provided with heated medium channels communicated with the outside, and the expander, the second expander, the third expander and the fourth expander are connected with the compressor and the second compressor and transmit power to form the dual-working-medium combined cycle compression heat pump.

2. The double-working medium combined cycle compression heat pump mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supplier, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander, a second heat supplier and a low-temperature heat regenerator; the heat supplier has condensed liquid pipeline connected via circulating pump to the mixing evaporator, the expander has steam passage connected via the medium temperature evaporator to the mixing evaporator, the mixing evaporator has also steam passage connected to the compressor and the second expander separately, the compressor has also steam passage connected via the high temperature heat exchanger to the expander, and the second expander has also steam passage connected to the heat supplier; the heat supply device is also provided with a condensate pipeline which is communicated with the medium temperature evaporator through a second circulating pump, then the medium temperature evaporator is provided with a steam channel which is communicated with a third expander, and the third expander is also provided with a steam channel which is communicated with the heat supply device; the external part of the expansion machine is provided with a low-temperature heat medium channel which is communicated with a second compressor through a low-temperature heat regenerator, the second compressor is also provided with a low-temperature heat medium channel which is communicated with a fourth expansion machine through a second heat supply device and the low-temperature heat regenerator, and the fourth expansion machine is also provided with a low-temperature heat medium channel which is communicated with the external part; the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the heat supply device and the second heat supply device are also provided with heated medium channels communicated with the outside, and the expander, the second expander, the third expander and the fourth expander are connected with the compressor and the second compressor and transmit power to form the dual-working-medium combined cycle compression heat pump.

3. The double-working medium combined cycle compression heat pump mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supplier, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander, a second heat supplier and a low-temperature heat exchanger; the heat supplier has condensed liquid pipeline connected via circulating pump to the mixing evaporator, the expander has steam passage connected via the medium temperature evaporator to the mixing evaporator, the mixing evaporator has also steam passage connected to the compressor and the second expander separately, the compressor has also steam passage connected via the high temperature heat exchanger to the expander, and the second expander has also steam passage connected to the heat supplier; the heat supply device is also provided with a condensate pipeline which is communicated with the medium temperature evaporator through a second circulating pump, then the medium temperature evaporator is provided with a steam channel which is communicated with a third expander, and the third expander is also provided with a steam channel which is communicated with the heat supply device; the second compressor is provided with a circulating medium channel which is communicated with a fourth expander through a second heat supply device, and the fourth expander is also provided with a circulating medium channel which is communicated with the second compressor through a low-temperature heat exchanger; the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the heat supply device and the second heat supply device are also provided with heated medium channels communicated with the outside, the low-temperature heat exchanger is also provided with a low-temperature heat medium channel communicated with the outside, and the expander, the second expander, the third expander and the fourth expander are connected with the compressor and the second compressor and transmit power to form the double-working-medium combined cycle compression heat pump.

4. The dual-working medium combined cycle compression heat pump mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supplier, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander, a second heat supplier, a low-temperature heat regenerator and a low-temperature heat exchanger; the heat supplier has condensed liquid pipeline connected via circulating pump to the mixing evaporator, the expander has steam passage connected via the medium temperature evaporator to the mixing evaporator, the mixing evaporator has also steam passage connected to the compressor and the second expander separately, the compressor has also steam passage connected via the high temperature heat exchanger to the expander, and the second expander has also steam passage connected to the heat supplier; the heat supply device is also provided with a condensate pipeline which is communicated with the medium temperature evaporator through a second circulating pump, then the medium temperature evaporator is provided with a steam channel which is communicated with a third expander, and the third expander is also provided with a steam channel which is communicated with the heat supply device; the second compressor is provided with a circulating medium channel which is communicated with a fourth expander through a second heat supplier and a low-temperature heat regenerator, and the fourth expander is also provided with a circulating medium channel which is communicated with the second compressor through a low-temperature heat exchanger and a low-temperature heat regenerator; the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the heat supply device and the second heat supply device are also provided with heated medium channels communicated with the outside, the low-temperature heat exchanger is also provided with a low-temperature heat medium channel communicated with the outside, and the expander, the second expander, the third expander and the fourth expander are connected with the compressor and the second compressor and transmit power to form the double-working-medium combined cycle compression heat pump.

5. The double-working medium combined cycle compression heat pump mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supplier, a mixed evaporator, a medium-temperature evaporator, a second compressor, a second heat supplier, a throttle valve and an evaporator; the heat supplier has condensed liquid pipeline connected via circulating pump to the mixing evaporator, the expander has steam passage connected via the medium temperature evaporator to the mixing evaporator, the mixing evaporator has also steam passage connected to the compressor and the second expander separately, the compressor has also steam passage connected via the high temperature heat exchanger to the expander, and the second expander has also steam passage connected to the heat supplier; the heat supply device is also provided with a condensate pipeline which is communicated with the medium temperature evaporator through a second circulating pump, then the medium temperature evaporator is provided with a steam channel which is communicated with a third expander, and the third expander is also provided with a steam channel which is communicated with the heat supply device; the second compressor is provided with a circulating medium channel which is communicated with a second heat supplier, the second heat supplier is also provided with a circulating medium channel which is communicated with the evaporator through a throttle valve, and the evaporator is also provided with a circulating medium channel which is communicated with the second compressor; the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the heat supply device, the second heat supply device, a heated medium channel communicated with the outside, the evaporator is also provided with a low-temperature heat medium channel communicated with the outside, and the expander, the second expander and the third expander are connected with the compressor and the second compressor and transmit power to form the dual-working-medium combined cycle compression heat pump.

6. A dual-working medium combined cycle compression heat pump is characterized in that a heat regenerator and a third circulating pump are added in any one of the dual-working medium combined cycle compression heat pumps in items 1-5, a condensing liquid pipeline of the heat supplier is communicated with a mixed evaporator through the circulating pump, the condensing liquid pipeline of the heat supplier is communicated with the heat regenerator through the circulating pump, an extraction channel is additionally arranged on a second expander or a third expander and is communicated with the heat regenerator, and the heat regenerator is further communicated with the mixed evaporator through the condensing liquid pipeline of the third circulating pump, so that the dual-working medium combined cycle compression heat pump is formed.

7. A dual-working medium combined cycle compression heat pump is characterized in that a heat regenerator and a third circulating pump are added in any one of the dual-working medium combined cycle compression heat pumps in items 1-5, a heat supplier is adjusted to be provided with a condensate pipeline communicated with a medium temperature evaporator through a second circulating pump, the heat supplier is provided with a condensate pipeline communicated with the heat regenerator through the second circulating pump, a second expander or a third expander is additionally provided with a steam extraction channel communicated with the heat regenerator, and the heat regenerator is provided with a condensate pipeline communicated with the medium temperature evaporator through the third circulating pump, so that the dual-working medium combined cycle compression heat pump is formed.

8. A dual-working medium combined cycle compression heat pump is characterized in that a heat regenerator, a second heat regenerator, a third circulating pump and a fourth circulating pump are added in any one of the 1 st to 5 th double-working medium combined cycle compression heat pumps, a condensed fluid pipeline of the heat supplier is communicated with a mixing evaporator through the circulating pump, the heat supplier is adjusted to be provided with a condensed fluid pipeline which is communicated with the heat regenerator through the circulating pump, a second expander or a third expander is additionally provided with a steam extraction channel which is communicated with the heat regenerator, and the heat regenerator is further provided with a condensed fluid pipeline which is communicated with the mixing evaporator through the third circulating pump; a condensing liquid pipeline of the heat supply device is communicated with the medium-temperature evaporator through a second circulating pump, and is adjusted to be communicated with a second heat regenerator through the second circulating pump, a steam extraction channel is additionally arranged on a second expansion machine or a third expansion machine to be communicated with the second heat regenerator, and the second heat regenerator is communicated with the medium-temperature evaporator through a condensing liquid pipeline, so that the double-working-medium combined cycle compression heat pump is formed.

9. A dual-working medium combined cycle compression heat pump is characterized in that a preheater is added in any one of the dual-working medium combined cycle compression heat pumps in items 1-5, a condensed fluid pipeline of a heat supplier is communicated with a mixing evaporator through a circulating pump, the heat supplier is adjusted to be communicated with the mixing evaporator through the circulating pump and the preheater, the condensed fluid pipeline of the heat supplier is communicated with the mixing evaporator through the circulating pump and the preheater, and a heat source medium channel of the preheater is communicated with the outside to form the dual-working medium combined cycle compression heat pump.

10. A dual-working medium combined cycle compression heat pump is characterized in that a preheater is added in any one of the dual-working medium combined cycle compression heat pumps in items 1-5, a condensed fluid pipeline of a heat supplier is communicated with a medium temperature evaporator through a second circulating pump, the heat supplier is adjusted to be communicated with the medium temperature evaporator through the second circulating pump and the preheater, the preheater is also communicated with the outside through a heat source medium channel, and the dual-working medium combined cycle compression heat pump is formed.

11. A dual-working medium combined cycle compression heat pump is characterized in that a preheater and a second preheater are added in any one of the dual-working medium combined cycle compression heat pumps in items 1-5, a heat supply device is adjusted to be provided with a condensate pipeline communicated with a mixing evaporator through a circulating pump and the preheater and communicated with the mixing evaporator through the circulating pump, the heat supply device is adjusted to be provided with a condensate pipeline communicated with a medium temperature evaporator through the second circulating pump and the medium temperature evaporator, the heat supply device is provided with a condensate pipeline communicated with the medium temperature evaporator through the second circulating pump and the second preheater, and the preheater and the second preheater are respectively provided with a heat source medium channel communicated with the outside to form the dual-working medium combined cycle compression heat pump.

12. A dual-working medium combined cycle compression heat pump is characterized in that a preheater and a second preheater are added in any one of the dual-working medium combined cycle compression heat pumps in items 1-5, a heat supplier is provided with a condensate pipeline which is communicated with a mixing evaporator through a circulating pump, the heat supplier is provided with a condensate pipeline which is communicated with a medium temperature evaporator through a second circulating pump, the heat supplier is adjusted into two paths after the condensate pipeline passes through the circulating pump and the preheater, the first path is directly communicated with the mixing evaporator, the second path is communicated with the medium temperature evaporator through the second circulating pump and the second preheater, and the preheater and the second preheater are respectively provided with a heat source medium channel which is communicated with the outside to form the dual-working medium combined cycle compression heat pump.

13. A dual-working medium combined cycle compression heat pump is characterized in that in any one of the dual-working medium combined cycle compression heat pumps in items 1-12, an intermediate reheater is added, a steam channel of an intermediate temperature evaporator is communicated with a third expander, a steam channel of the third expander is communicated with a heat supply device, the intermediate temperature evaporator is adjusted to be communicated with the third expander through the steam channel, the third expander is also provided with an intermediate reheater steam channel, the intermediate reheater steam channel is communicated with the third expander through the intermediate reheater, the third expander is also provided with a steam channel which is communicated with the heat supply device, and the intermediate reheater is also provided with a heat source medium channel which is communicated with the outside to form the dual-working medium combined cycle compression heat pump.

14. A dual working medium combined cycle compression heat pump is characterized in that a third heat supply device is added in any one of the dual working medium combined cycle compression heat pumps in items 1-5, a third expander is communicated with the heat supply device through a steam channel, the third expander is communicated with the third heat supply device through a steam channel, the heat supply device is communicated with a medium temperature evaporator through a second circulating pump through a condensate pipeline, the third heat supply device is communicated with the medium temperature evaporator through a second circulating pump through a condensate pipeline, the third heat supply device is further communicated with the outside through a heated medium channel, and the dual working medium combined cycle compression heat pump is formed.

15. A dual-working medium combined cycle compression heat pump is characterized in that a high-temperature heat regenerator is added in any one of the dual-working medium combined cycle compression heat pumps in items 1 to 14, a steam channel of a compressor is communicated with an expander through a high-temperature heat exchanger and adjusted to be communicated with the expander through the high-temperature heat regenerator and the high-temperature heat exchanger, a steam channel of the expander is communicated with a mixed evaporator through a medium-temperature evaporator and adjusted to be communicated with the mixed evaporator through the high-temperature heat regenerator and the medium-temperature evaporator, and the dual-working medium combined cycle compression heat pump is formed.

16. A dual-working medium combined cycle compression heat pump is characterized in that a newly added compressor and a newly added high-temperature heat exchanger are added in any one of the dual-working medium combined cycle compression heat pumps in items 1 to 14, a steam channel of the compressor is communicated with an expander through the high-temperature heat exchanger, the compressor is adjusted to be communicated with the newly added compressor through the steam channel of the compressor, the newly added compressor is communicated with the expander through the newly added high-temperature heat exchanger, the newly added high-temperature heat exchanger is also communicated with the outside through a heat source medium channel, and the expander is connected with the newly added compressor and transmits power to form the dual-working medium combined cycle compression heat pump.

17. A dual-working medium combined cycle compression heat pump is characterized in that a new expansion machine and a new high-temperature heat exchanger are added in any one of the dual-working medium combined cycle compression heat pumps in items 1-14, a steam channel of a compressor is communicated with the expansion machine through the high-temperature heat exchanger, the compressor is adjusted to be communicated with the new expansion machine through the steam channel of the compressor, the new expansion machine is communicated with the expansion machine through the new high-temperature heat exchanger, the new high-temperature heat exchanger is communicated with the outside through a heat source medium channel, and the new expansion machine is connected with the compressor and transmits power to form the dual-working medium combined cycle compression heat pump.

18. A dual-working-medium combined cycle compression heat pump is characterized in that a high-temperature heat regenerator, a newly-added compressor and a newly-added high-temperature heat exchanger are added in any one of the dual-working-medium combined cycle compression heat pumps in items 1 to 14, a steam channel of the compressor is communicated with an expander through the high-temperature heat exchanger and the high-temperature heat exchanger, a steam channel of the newly-added compressor is communicated with the expander through the newly-added high-temperature heat exchanger, a steam channel of the expander is communicated with a hybrid evaporator through a medium-temperature evaporator, and is adjusted to be communicated with the hybrid evaporator through the high-temperature heat regenerator and the medium-temperature evaporator, a steam channel of the expander is communicated with the hybrid evaporator through the high-temperature heat regenerator and the medium-temperature evaporator, the newly-added high-temperature heat exchanger is also communicated with the outside, and the expander is connected with.

19. A dual-working medium combined cycle compression heat pump is characterized in that a high-temperature heat regenerator, a new expansion machine and a new high-temperature heat exchanger are added in any one of the dual-working medium combined cycle compression heat pumps in items 1 to 14, a steam channel of a compressor is communicated with an expansion machine through the high-temperature heat exchanger and adjusted to be communicated with the new expansion machine through the high-temperature heat regenerator and the high-temperature heat exchanger, a steam channel of the new expansion machine is communicated with the expansion machine through the new high-temperature heat exchanger, a steam channel of the expansion machine is communicated with a mixed evaporator through a medium-temperature evaporator and adjusted to be communicated with the mixed evaporator through the high-temperature heat regenerator and the medium-temperature evaporator, the new high-temperature heat exchanger is communicated with the outside through a heat source medium channel, and the new expansion machine is connected with the compressor and transmits power to form the dual-working medium combined cycle.

20. A dual working medium combined cycle compression heat pump is characterized in that in any one of the dual working medium combined cycle compression heat pumps of items 1-13 and 15-19, a third expander is communicated with a heat supply device through a steam channel, and is adjusted to be communicated with a second expander through the steam channel, so that the dual working medium combined cycle compression heat pump is formed.

21. A dual-working medium combined cycle compression heat pump is characterized in that in any one of the dual-working medium combined cycle compression heat pumps 1-13 and 15-19, a third expander is eliminated, a steam channel communicated with a heat supply device is eliminated, a medium-temperature evaporator is communicated with the third expander through a steam channel and adjusted to be communicated with the second expander through the medium-temperature evaporator through the steam channel, a mixed evaporator and the steam channel are respectively communicated with a compressor and the second expander through the mixed evaporator, adjusted to be communicated with the compressor through the steam channel and communicated with the second expander through an intermediate steam inlet channel, and formed into the dual-working medium combined cycle compression heat pump.

22. A dual-working medium combined cycle compression heat pump is characterized in that in any one of the dual-working medium combined cycle compression heat pumps in items 1-21, a heat source medium channel is additionally arranged on a mixing evaporator or a medium temperature evaporator and is communicated with the outside to form the dual-working medium combined cycle compression heat pump.

23. A dual-working medium combined cycle compression heat pump is characterized in that in any one of the dual-working medium combined cycle compression heat pumps in items 1-21, a mixing evaporator and a medium temperature evaporator are respectively provided with a heat source medium channel to be communicated with the outside, so that the dual-working medium combined cycle compression heat pump is formed.

24. A dual working medium combined cycle compression heat pump is characterized in that a power machine is added in any one of the dual working medium combined cycle compression heat pumps in items 1 to 23, the power machine is connected with a second compressor and provides power for the second compressor, and a dual working medium combined cycle compression heat pump driven by additional external power is formed.

25. A dual working medium combined cycle compression heat pump is characterized in that a working machine is added in any one of the dual working medium combined cycle compression heat pumps in items 1 to 23, and an expansion machine is connected with the working machine and provides power for the working machine to form the dual working medium combined cycle compression heat pump additionally providing power load to the outside.

Description of the drawings:

fig. 1 is a diagram of a 1 st principal thermodynamic system for a dual-working-medium combined-cycle compression heat pump according to the present invention.

Fig. 2 is a 2 nd principle thermodynamic system diagram of a dual-working-medium combined-cycle compression heat pump provided according to the present invention.

Fig. 3 is a 3 rd principle thermodynamic system diagram of a dual-working-medium combined-cycle compression heat pump provided in accordance with the present invention.

Fig. 4 is a diagram of a 4 th principle thermodynamic system for a dual-working-medium combined-cycle compression heat pump according to the present invention.

Fig. 5 is a diagram of a 5 th principle thermodynamic system for a dual-working-medium combined-cycle compression heat pump according to the present invention.

Fig. 6 is a 6 th principle thermodynamic system diagram of a dual-working-medium combined-cycle compression heat pump according to the present invention.

Fig. 7 is a 7 th principle thermodynamic system diagram of a dual-working-medium combined-cycle compression heat pump provided in accordance with the present invention.

Fig. 8 is a diagram of an 8 th principle thermodynamic system for a dual-working-medium combined-cycle compression heat pump according to the present invention.

Fig. 9 is a diagram of a 9 th principle thermodynamic system for a dual-working-medium combined-cycle compression heat pump according to the present invention.

Fig. 10 is a diagram of a 10 th principle thermodynamic system for a dual-working-medium combined-cycle compression heat pump according to the present invention.

Fig. 11 is a diagram of an 11 th principle thermodynamic system for a dual-working-medium combined-cycle compression heat pump according to the present invention.

Fig. 12 is a diagram of a 12 th principle thermodynamic system for a dual-working-medium combined-cycle compression heat pump according to the present invention.

Fig. 13 is a 13 th principle thermodynamic system diagram of a dual-working-medium combined-cycle compression heat pump provided in accordance with the present invention.

Fig. 14 is a diagram of a 14 th principle thermodynamic system for a dual-working-medium combined-cycle compression heat pump according to the present invention.

Fig. 15 is a diagram of a 15 th principle thermodynamic system for a dual-working-medium combined-cycle compression heat pump according to the present invention.

Fig. 16 is a 16 th principle thermodynamic system diagram of a dual-working-medium combined-cycle compression heat pump provided in accordance with the present invention.

In the figure, 1-compressor, 2-expander, 3-second expander, 4-third expander, 5-circulating pump, 6-second circulating pump, 7-high temperature heat exchanger, 8-heat supplier, 9-hybrid evaporator, 10-medium temperature evaporator, 11-second compressor, 12-fourth expander, 13-second heat supplier, 14-low temperature heat regenerator, 15-low temperature heat exchanger, 16-throttle valve, 17-evaporator, 18-heat regenerator, 19-second heat regenerator, 20-third circulating pump, 21-fourth circulating pump, 22-preheater, 23-second preheater, 24-intermediate reheater, 25-third heat supplier, 26-high temperature regenerator; a-newly-increased compressor, B-newly-increased expansion machine and C-newly-increased high-temperature heat exchanger.

The specific implementation mode is as follows:

it is to be noted that, in the description of the structure and the flow, the repetition is not necessary; obvious flow is not described. The invention is described in detail below with reference to the figures and examples.

The dual-working-medium combined-cycle compression heat pump shown in fig. 1 is realized by:

(1) structurally, the system mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supply device, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander and a second heat supply device; the heat supplier 8 has a condensate pipeline communicated with the mixing evaporator 9 through the circulating pump 5, the expander 2 has a steam channel communicated with the mixing evaporator 9 through the intermediate temperature evaporator 10, the mixing evaporator 9 and the steam channel are respectively communicated with the compressor 1 and the second expander 3, the compressor 1 and the steam channel are communicated with the expander 2 through the high temperature heat exchanger 7, and the second expander 3 and the steam channel are communicated with the heat supplier 8; the heat supplier 8 is also provided with a condensate pipeline which is communicated with the medium temperature evaporator 10 through the second circulating pump 6, then the medium temperature evaporator 10 is provided with a steam channel which is communicated with the third expander 4, and the third expander 4 is also provided with a steam channel which is communicated with the heat supplier 8; a low-temperature heat medium channel is arranged outside and communicated with the second compressor 11, the second compressor 11 is also provided with a low-temperature heat medium channel which is communicated with the fourth expander 12 through a second heat supply device 13, and the fourth expander 12 is also provided with a low-temperature heat medium channel which is communicated with the outside; the high-temperature heat exchanger 7 is also communicated with the outside through a heat source medium channel, the heat supplier 8 and the second heat supplier 13 are also communicated with the outside through a heated medium channel, and the expander 2, the second expander 3, the third expander 4 and the fourth expander 12 are connected with the compressor 1 and the second compressor 11 and transmit power.

(2) In the process, steam discharged by the compressor 1 flows through the high-temperature heat exchanger 7 and absorbs heat, and then enters the expander 2 to reduce the pressure and do work; the steam discharged by the expander 2 flows through the medium temperature evaporator 10 and releases heat to reduce the temperature, and then enters the mixing evaporator 9 to be mixed with the condensate from the heat supply device 8 and releases heat to reduce the temperature; the condensate of the heater 8 is divided into two paths, wherein the first path is pressurized by the circulating pump 5 and enters the mixing evaporator 9, and the second path is pressurized by the second circulating pump 6 and enters the medium temperature evaporator 10 to absorb heat and vaporize; the steam generated by the mixed evaporator 9 enters the compressor 1 to increase the pressure and temperature and enters the second expander 3 to reduce the pressure and do work, and the steam discharged by the second expander 3 enters the heat supplier 8 to release heat and condense; the steam generated by the medium temperature evaporator 10 flows through the third expansion machine 4 to reduce the pressure and do work, and then enters the heat supply device 8 to release heat and condense; the external low-temperature heat medium enters the second compressor 11 to be boosted and heated, flows through the second heat supply device 13 to release heat, flows through the fourth expansion machine 12 to be decompressed and work done, and is discharged outwards; the heat source medium provides driving heat load through the high-temperature heat exchanger 7, the medium to be heated takes away medium-temperature heat load through the heat supplier 8 and the second heat supplier 13, the low-temperature heat medium provides low-temperature heat load through the inlet and outlet flow, and the work output by the expander 2, the second expander 3, the third expander 4 and the fourth expander 12 is provided for the compressor 1 and the second compressor 11 as power, so that the dual-working-medium combined cycle compression heat pump is formed.

The dual-working-medium combined-cycle compression heat pump shown in fig. 2 is realized by:

(1) structurally, the system mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supply device, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander, a second heat supply device and a low-temperature heat regenerator; the heat supplier 8 has a condensate pipeline communicated with the mixing evaporator 9 through the circulating pump 5, the expander 2 has a steam channel communicated with the mixing evaporator 9 through the intermediate temperature evaporator 10, the mixing evaporator 9 and the steam channel are respectively communicated with the compressor 1 and the second expander 3, the compressor 1 and the steam channel are communicated with the expander 2 through the high temperature heat exchanger 7, and the second expander 3 and the steam channel are communicated with the heat supplier 8; the heat supplier 8 is also provided with a condensate pipeline which is communicated with the medium temperature evaporator 10 through the second circulating pump 6, then the medium temperature evaporator 10 is provided with a steam channel which is communicated with the third expander 4, and the third expander 4 is also provided with a steam channel which is communicated with the heat supplier 8; a low-temperature heat medium channel is arranged outside and communicated with the second compressor 11 through a low-temperature heat regenerator 14, the second compressor 11 is also provided with a low-temperature heat medium channel which is communicated with a fourth expander 12 through a second heat supplier 13 and the low-temperature heat regenerator 14, and the fourth expander 12 is also provided with a low-temperature heat medium channel which is communicated with the outside; the high-temperature heat exchanger 7 is also communicated with the outside through a heat source medium channel, the heat supplier 8 and the second heat supplier 13 are also communicated with the outside through a heated medium channel, and the expander 2, the second expander 3, the third expander 4 and the fourth expander 12 are connected with the compressor 1 and the second compressor 11 and transmit power.

(2) In the process, steam discharged by the compressor 1 flows through the high-temperature heat exchanger 7 and absorbs heat, and then enters the expander 2 to reduce the pressure and do work; the steam discharged by the expander 2 flows through the medium temperature evaporator 10 and releases heat to reduce the temperature, and then enters the mixing evaporator 9 to be mixed with the condensate from the heat supply device 8 and releases heat to reduce the temperature; the condensate of the heater 8 is divided into two paths, wherein the first path is pressurized by the circulating pump 5 and enters the mixing evaporator 9, and the second path is pressurized by the second circulating pump 6 and enters the medium temperature evaporator 10 to absorb heat and vaporize; the steam generated by the mixed evaporator 9 enters the compressor 1 to increase the pressure and temperature and enters the second expander 3 to reduce the pressure and do work, and the steam discharged by the second expander 3 enters the heat supplier 8 to release heat and condense; the steam generated by the medium temperature evaporator 10 flows through the third expansion machine 4 to reduce the pressure and do work, and then enters the heat supply device 8 to release heat and condense; the external low-temperature heat medium flows through the low-temperature heat regenerator 14 to absorb heat, flows through the second compressor 11 to increase the pressure and the temperature, flows through the second heat supplier 13 and the low-temperature heat regenerator 14 to gradually release heat, flows through the fourth expander 12 to reduce the pressure and do work, and is externally discharged; the heat source medium provides driving heat load through the high-temperature heat exchanger 7, the medium to be heated takes away medium-temperature heat load through the heat supplier 8 and the second heat supplier 13, the low-temperature heat medium provides low-temperature heat load through the inlet and outlet flow, and the work output by the expander 2, the second expander 3, the third expander 4 and the fourth expander 12 is provided for the compressor 1 and the second compressor 11 as power, so that the dual-working-medium combined cycle compression heat pump is formed.

The dual working medium combined cycle compression heat pump shown in fig. 3 is realized by the following steps:

(1) structurally, the system mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supply device, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander, a second heat supply device and a low-temperature heat exchanger; the heat supplier 8 has a condensate pipeline communicated with the mixing evaporator 9 through the circulating pump 5, the expander 2 has a steam channel communicated with the mixing evaporator 9 through the intermediate temperature evaporator 10, the mixing evaporator 9 and the steam channel are respectively communicated with the compressor 1 and the second expander 3, the compressor 1 and the steam channel are communicated with the expander 2 through the high temperature heat exchanger 7, and the second expander 3 and the steam channel are communicated with the heat supplier 8; the heat supplier 8 is also provided with a condensate pipeline which is communicated with the medium temperature evaporator 10 through the second circulating pump 6, then the medium temperature evaporator 10 is provided with a steam channel which is communicated with the third expander 4, and the third expander 4 is also provided with a steam channel which is communicated with the heat supplier 8; the second compressor 11 is provided with a circulating medium channel which is communicated with the fourth expander 12 through a second heat supply device 13, and the fourth expander 12 is also provided with a circulating medium channel which is communicated with the second compressor 11 through a low-temperature heat exchanger 15; the high-temperature heat exchanger 7 is also communicated with the outside through a heat source medium channel, the heat supplier 8 and the second heat supplier 13 are also communicated with the outside through a heated medium channel, the low-temperature heat exchanger 15 is also communicated with the outside through a low-temperature heat medium channel, and the expander 2, the second expander 3, the third expander 4 and the fourth expander 12 are connected with the compressor 1 and the second compressor 11 and transmit power.

(2) In the process, steam discharged by the compressor 1 flows through the high-temperature heat exchanger 7 and absorbs heat, and then enters the expander 2 to reduce the pressure and do work; the steam discharged by the expander 2 flows through the medium temperature evaporator 10 and releases heat to reduce the temperature, and then enters the mixing evaporator 9 to be mixed with the condensate from the heat supply device 8 and releases heat to reduce the temperature; the condensate of the heater 8 is divided into two paths, wherein the first path is pressurized by the circulating pump 5 and enters the mixing evaporator 9, and the second path is pressurized by the second circulating pump 6 and enters the medium temperature evaporator 10 to absorb heat and vaporize; the steam generated by the mixed evaporator 9 enters the compressor 1 to increase the pressure and temperature and enters the second expander 3 to reduce the pressure and do work, and the steam discharged by the second expander 3 enters the heat supplier 8 to release heat and condense; the steam generated by the medium temperature evaporator 10 flows through the third expansion machine 4 to reduce the pressure and do work, and then enters the heat supply device 8 to release heat and condense; the circulating medium discharged from the second compressor 11 flows through the second heat supply device 13 and releases heat, flows through the fourth expansion machine 12 to reduce pressure and do work, flows through the low-temperature heat exchanger 15 and absorbs heat, and then enters the second compressor 11 to increase pressure and temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7, the medium to be heated takes away medium-temperature heat load through the heat supplier 8 and the second heat supplier 13, the low-temperature heat medium provides low-temperature heat load through the low-temperature heat exchanger 15, and the work output by the expander 2, the second expander 3, the third expander 4 and the fourth expander 12 is provided for the compressor 1 and the second compressor 11 as power, so that the dual-working-medium combined cycle compression heat pump is formed.

The dual-working-medium combined-cycle compression heat pump shown in fig. 4 is realized by:

(1) structurally, the system mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supply device, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander, a second heat supply device, a low-temperature heat regenerator and a low-temperature heat exchanger; the heat supplier 8 has a condensate pipeline communicated with the mixing evaporator 9 through the circulating pump 5, the expander 2 has a steam channel communicated with the mixing evaporator 9 through the intermediate temperature evaporator 10, the mixing evaporator 9 and the steam channel are respectively communicated with the compressor 1 and the second expander 3, the compressor 1 and the steam channel are communicated with the expander 2 through the high temperature heat exchanger 7, and the second expander 3 and the steam channel are communicated with the heat supplier 8; the heat supplier 8 is also provided with a condensate pipeline which is communicated with the medium temperature evaporator 10 through the second circulating pump 6, then the medium temperature evaporator 10 is provided with a steam channel which is communicated with the third expander 4, and the third expander 4 is also provided with a steam channel which is communicated with the heat supplier 8; the second compressor 11 is provided with a circulating medium channel which is communicated with the fourth expander 12 through a second heat supplier 13 and a low-temperature heat regenerator 14, and the fourth expander 12 is also provided with a circulating medium channel which is communicated with the second compressor 11 through a low-temperature heat exchanger 15 and a low-temperature heat regenerator 14; the high-temperature heat exchanger 7 is also communicated with the outside through a heat source medium channel, the heat supplier 8 and the second heat supplier 13 are also communicated with the outside through a heated medium channel, the low-temperature heat exchanger 15 is also communicated with the outside through a low-temperature heat medium channel, and the expander 2, the second expander 3, the third expander 4 and the fourth expander 12 are connected with the compressor 1 and the second compressor 11 and transmit power.

(2) In the process, steam discharged by the compressor 1 flows through the high-temperature heat exchanger 7 and absorbs heat, and then enters the expander 2 to reduce the pressure and do work; the steam discharged by the expander 2 flows through the medium temperature evaporator 10 and releases heat to reduce the temperature, and then enters the mixing evaporator 9 to be mixed with the condensate from the heat supply device 8 and releases heat to reduce the temperature; the condensate of the heater 8 is divided into two paths, wherein the first path is pressurized by the circulating pump 5 and enters the mixing evaporator 9, and the second path is pressurized by the second circulating pump 6 and enters the medium temperature evaporator 10 to absorb heat and vaporize; the steam generated by the mixed evaporator 9 enters the compressor 1 to increase the pressure and temperature and enters the second expander 3 to reduce the pressure and do work, and the steam discharged by the second expander 3 enters the heat supplier 8 to release heat and condense; the steam generated by the medium temperature evaporator 10 flows through the third expansion machine 4 to reduce the pressure and do work, and then enters the heat supply device 8 to release heat and condense; the circulating medium discharged from the second compressor 11 flows through the second heat supply device 13 and the low-temperature heat regenerator 14 and gradually releases heat, flows through the fourth expansion machine 12 to reduce pressure and do work, flows through the low-temperature heat exchanger 15 and the low-temperature heat regenerator 14 and gradually absorbs heat, and then enters the second compressor 11 to increase pressure and temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7, the medium to be heated takes away medium-temperature heat load through the heat supplier 8 and the second heat supplier 13, the low-temperature heat medium provides low-temperature heat load through the low-temperature heat exchanger 15, and the work output by the expander 2, the second expander 3, the third expander 4 and the fourth expander 12 is provided for the compressor 1 and the second compressor 11 as power, so that the dual-working-medium combined cycle compression heat pump is formed.

The dual-working-medium combined-cycle compression heat pump shown in fig. 5 is realized by:

(1) structurally, the system mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supply device, a mixed evaporator, a medium-temperature evaporator, a second compressor, a second heat supply device, a throttle valve and an evaporator; the heat supplier 8 has a condensate pipeline communicated with the mixing evaporator 9 through the circulating pump 5, the expander 2 has a steam channel communicated with the mixing evaporator 9 through the intermediate temperature evaporator 10, the mixing evaporator 9 and the steam channel are respectively communicated with the compressor 1 and the second expander 3, the compressor 1 and the steam channel are communicated with the expander 2 through the high temperature heat exchanger 7, and the second expander 3 and the steam channel are communicated with the heat supplier 8; the heat supply device 8 also has a condensate pipeline, the medium temperature evaporator 10 is communicated with the medium temperature evaporator 10 through the second circulating pump 6, then a steam channel is communicated with the third expansion machine 4, and the third expansion machine 4 is also communicated with the heat supply device 8 through a steam channel: the second compressor 11 is provided with a circulating medium channel which is communicated with the second heat supplier 13, the second heat supplier 13 is also provided with a circulating medium channel which is communicated with the evaporator 17 through the throttle valve 16, and the evaporator 17 is also provided with a circulating medium channel which is communicated with the second compressor 11; the high-temperature heat exchanger 7 and the medium-temperature evaporator 10 are also respectively communicated with the outside through heat source medium channels, the heat supplier 8 and the second heat supplier 13 are also communicated with the outside through heated medium channels, the evaporator 17 is also communicated with the outside through low-temperature heat medium channels, and the expander 2, the second expander 3 and the third expander 4 are connected with the compressor 1 and the second compressor 11 and transmit power.

(2) In the process, steam discharged by the compressor 1 flows through the high-temperature heat exchanger 7 and absorbs heat, and then enters the expander 2 to reduce the pressure and do work; the steam discharged by the expander 2 flows through the medium temperature evaporator 10 and releases heat to reduce the temperature, and then enters the mixing evaporator 9 to be mixed with the condensate from the heat supply device 8 and releases heat to reduce the temperature; the condensate of the heater 8 is divided into two paths, wherein the first path is pressurized by the circulating pump 5 and enters the mixing evaporator 9, and the second path is pressurized by the second circulating pump 6 and enters the medium temperature evaporator 10 to absorb heat and vaporize; the steam generated by the mixed evaporator 9 enters the compressor 1 to increase the pressure and temperature and enters the second expander 3 to reduce the pressure and do work, and the steam discharged by the second expander 3 enters the heat supplier 8 to release heat and condense; the steam generated by the medium temperature evaporator 10 flows through the third expansion machine 4 to reduce the pressure and do work, and then enters the heat supply device 8 to release heat and condense; the circulating medium discharged by the second compressor 11 enters the second heat supply device 13 to release heat and condense, the condensate flows through the throttle valve 16 to be throttled and depressurized and then enters the evaporator 17 to absorb heat to form steam, and the steam discharged by the evaporator 17 enters the second compressor 11 to be boosted and heated; the heat source medium provides driving heat load through the high-temperature heat exchanger 7 and the medium-temperature evaporator 10, the medium to be heated takes away medium-temperature heat load through the heat supplier 8 and the second heat supplier 13, the low-temperature heat medium provides low-temperature heat load through the evaporator 17, and the work output by the expander 2, the second expander 3 and the third expander 4 is provided for the compressor 1 and the second compressor 11 as power, so that the dual-working-medium combined cycle compression heat pump is formed.

The dual-working-medium combined-cycle compression heat pump shown in fig. 6 is realized by:

(1) structurally, in the dual-working medium combined cycle compression heat pump shown in fig. 1, a heat regenerator, a second heat regenerator, a third circulating pump and a fourth circulating pump are added, a condensate pipeline of a heat supplier 8 is communicated with a mixed evaporator 9 through a circulating pump 5 and adjusted to be communicated with the heat regenerator 18 through the circulating pump 5, a steam extraction channel is additionally arranged on a second expander 3 and is communicated with the heat regenerator 18, and a condensate pipeline of the heat regenerator 18 is communicated with the mixed evaporator 9 through the third circulating pump 20; a condensing liquid pipeline of the heat supply device 8 is communicated with the medium temperature evaporator 10 through the second circulating pump 6, the heating device 8 is adjusted to be communicated with the second heat regenerator 19 through the second circulating pump 6, the third expansion machine 4 is additionally provided with a steam extraction channel which is communicated with the second heat regenerator 19, and the second heat regenerator 19 is communicated with the medium temperature evaporator 10 through a fourth circulating pump 21.

(2) Compared with the double-working-medium combined cycle compression heat pump, the difference is that the first path of condensate of the heat supplier 8 is pressurized by the circulating pump 5 and enters the heat regenerator 18, the extracted steam of the second expander 3 enters the heat regenerator 18 and is mixed with the condensate to release heat and condense, and the condensate of the heat regenerator 18 is pressurized by the third circulating pump 20 and enters the mixing evaporator 9; the second path is pressurized by a second circulating pump 6 and enters a second heat regenerator 19, the extracted steam of the third expansion machine 4 enters the second heat regenerator 19 to be mixed with condensate, then the heat is released and the condensate is condensed, and the condensate of the second heat regenerator 19 is pressurized by a fourth circulating pump 21 and then enters a medium temperature evaporator 10 to absorb heat and vaporize; the steam generated by the mixed evaporator 9 is divided into two paths, the first path is provided for the compressor 1 to increase the pressure and the temperature, the second path is provided for the second expander 3, the steam enters the second expander 3 to complete partial work and then is divided into two paths, the first path enters the heat regenerator 18, the second path continues to reduce the pressure and work and then enters the heat supplier 8 to release heat and condense; the steam generated by the medium temperature evaporator 10 passes through the third expander 4 to complete partial pressure reduction work and then is divided into two paths, the first path enters the second heat regenerator 19, and the second path enters the heat supplier 8 to release heat and condense after completing the pressure reduction work, so that the double-working medium combined cycle compression heat pump is formed.

The dual working medium combined cycle compression heat pump shown in fig. 7 is realized by the following steps:

(1) structurally, in the dual-working medium combined cycle compression heat pump shown in fig. 1, a preheater and a second preheater are added, a condensate pipeline of a heat supply device 8 is communicated and adjusted to the heat supply device 8 through a circulating pump 5 and a mixing evaporator 9, the condensate pipeline of the heat supply device 8 is communicated with the mixing evaporator 9 through the circulating pump 5 and the preheater 22, the heat supply device 8 is communicated and adjusted to the heat supply device 8 through the second circulating pump 6 and a medium temperature evaporator 10, the condensate pipeline of the heat supply device 8 is communicated with the medium temperature evaporator 10 through the second circulating pump 6 and the second preheater 23, and the preheater 22 and the second preheater 23 are respectively communicated with a heat source medium channel and the outside.

(2) Compared with the double-working-medium combined cycle compression heat pump, the difference in the process is that the first path of the heat supply device 8 is pressurized by the circulating pump 5, passes through the preheater 22 to absorb heat and raise the temperature, then enters the hybrid evaporator 9, the second path of the heat supply device is pressurized by the second circulating pump 6, passes through the second preheater 23 to absorb heat and raise the temperature, then enters the medium temperature evaporator 10 to absorb heat and vaporize, and the double-working-medium combined cycle compression heat pump is formed.

The dual-working-medium combined-cycle compression heat pump shown in fig. 8 is realized by:

(1) structurally, in the dual-working medium combined cycle compression heat pump shown in fig. 1, a preheater and a second preheater are added, a condensate pipeline of a heat supply device 8 is communicated with a mixing evaporator 9 through a circulating pump 5, a condensate pipeline of the heat supply device 8 is communicated with a medium temperature evaporator 10 through a second circulating pump 6, the heat supply device 8 is adjusted to be divided into two paths after the condensate pipeline of the heat supply device 8 passes through the circulating pump 5 and the preheater 22, the first path is directly communicated with the mixing evaporator 7, the second path is communicated with the medium temperature evaporator 10 through the second circulating pump 6 and the second preheater 23, and the preheater 22 and the second preheater 23 are respectively communicated with the outside through heat source medium channels.

(2) Compared with the double working medium combined cycle compression heat pump, the difference in the flow is that the condensate of the heat supply device 8 is pressurized by the circulating pump 5 and flows through the preheater 22 to absorb heat, then the condensate is divided into two paths, the first path directly enters the mixing evaporator 9, the second path is pressurized by the second circulating pump 6 and flows through the second preheater 13 to absorb heat, and then enters the medium temperature evaporator 10, and the double working medium combined cycle compression heat pump is formed.

The dual-working-medium combined-cycle compression heat pump shown in fig. 9 is realized by:

(1) structurally, in the dual-working-medium combined cycle compression heat pump shown in fig. 1, an intermediate reheater is added, the intermediate temperature evaporator 10 is communicated with the third expander 4 through a steam passage, the third expander 4 is communicated with the heat supply device 8 through a steam passage, the intermediate temperature evaporator 10 is adjusted to be communicated with the third expander 4 through a steam passage, the third expander 4 is also communicated with the third expander 4 through an intermediate reheater 24 through an intermediate reheater passage, the third expander 4 is also communicated with the heat supply device 8 through a steam passage, and the intermediate reheater 24 is also communicated with the outside through a heat source medium passage.

(2) Compared with the double working medium combined cycle compression heat pump, the difference in the flow is that the steam output by the intermediate temperature evaporator 10 enters the third expander 4 to reduce the pressure and do work to a certain intermediate pressure, is led out, enters the intermediate reheater 24 through the intermediate reheating steam channel to absorb heat and raise the temperature, then enters the third expander 4 through the intermediate reheating steam channel to continue reducing the pressure and do work, and then enters the heat supplier 8 to release heat and condense, thus forming the double working medium combined cycle compression heat pump.

The dual-working-medium combined-cycle compression heat pump shown in fig. 10 is realized by:

(1) structurally, in the dual working medium combined cycle compression heat pump shown in fig. 1, a third heat supply device is added, a steam channel is arranged on the third expansion machine 4 to be communicated with the heat supply device 8, the third expansion machine 4 is adjusted to be communicated with the third heat supply device 25, a condensate pipeline is arranged on the heat supply device 8 to be communicated with the medium temperature evaporator 10 through the second circulating pump 6, a condensate pipeline is arranged on the third heat supply device 25 to be communicated with the medium temperature evaporator 10 through the second circulating pump 6, and the third heat supply device 25 is also communicated with the outside through a heated medium channel.

(2) Compared with the dual working medium combined cycle compression heat pump shown in fig. 1, the difference in the flow is that the steam discharged from the third expander 4 enters the third heat supply device 25 to release heat to the heated medium and condense, the condensate of the third condenser 25 flows through the second circulating pump 6 to increase the pressure, flows through the intermediate temperature evaporator 10 to absorb heat and vaporize, and then flows through the third expander 4 to reduce the pressure and do work, thereby forming the dual working medium combined cycle compression heat pump.

The dual-working-medium combined-cycle compression heat pump shown in fig. 11 is realized by:

(1) structurally, in the dual-working-medium combined cycle compression heat pump shown in fig. 1, a high-temperature heat regenerator is added, a steam channel of a compressor 1 is communicated with an expander 2 through a high-temperature heat exchanger 7 and adjusted to be communicated with the expander 2 through a steam channel of the compressor 1 and a high-temperature heat regenerator 26 and the high-temperature heat exchanger 7, and a steam channel of the expander 2 is communicated with a mixed evaporator 9 through a medium-temperature evaporator 10 and adjusted to be communicated with the mixed evaporator 9 through a steam channel of the expander 2 and the high-temperature heat regenerator 26 and the medium-temperature evaporator 10.

(2) Compared with the dual-working-medium combined cycle compression heat pump shown in fig. 1, the difference in the flow is that the steam discharged from the compressor 1 flows through the high-temperature heat regenerator 26 and the high-temperature heat exchanger 7 and gradually absorbs heat to raise the temperature, and the steam discharged from the expander 2 flows through the high-temperature heat regenerator 11 and the medium-temperature evaporator 10 and gradually releases heat to lower the temperature, and then enters the hybrid evaporator 9 to form the dual-working-medium combined cycle compression heat pump.

The dual-working-medium combined-cycle compression heat pump shown in fig. 12 is realized by:

(1) structurally, in the dual-working-medium combined cycle compression heat pump shown in fig. 1, a newly added compressor and a newly added high-temperature heat exchanger are added, a steam channel of the compressor 1 is communicated with the expander 2 through the high-temperature heat exchanger 7, the steam channel of the compressor 1 is communicated with the newly added compressor A through the high-temperature heat exchanger 7, the steam channel of the newly added compressor A is communicated with the expander 2 through the newly added high-temperature heat exchanger C, the newly added high-temperature heat exchanger C is also communicated with the outside through a heat source medium channel, and the expander 2 is connected with the newly added compressor A and transmits power.

(2) Compared with the double-working-medium combined cycle compression heat pump shown in the figure 1, the difference of the flow is that the steam discharged by the compressor 1 flows through the high-temperature heat exchanger 7 and absorbs heat, and then enters the newly-added compressor A to increase the pressure and the temperature; the steam discharged by the newly-added compressor A flows through the newly-added high-temperature heat exchanger C and absorbs heat, and then enters the expander 2 to reduce the pressure and do work; the expander 2 provides power for the newly-added compressor A, and the heat source medium provides driving heat load through the newly-added high-temperature heat exchanger C and the high-temperature heat exchanger 7, so that the double-working-medium combined cycle compression heat pump is formed.

The dual working medium combined cycle compression heat pump shown in fig. 13 is realized by the following steps:

(1) structurally, in the dual-working-medium combined-cycle compression heat pump shown in fig. 1, a new expansion machine and a new high-temperature heat exchanger are added, a steam channel of a compressor 1 is communicated with an expansion machine 2 through the high-temperature heat exchanger 7, the compressor 1 is adjusted to be communicated with a steam channel of the new expansion machine B through the high-temperature heat exchanger 7, the new expansion machine B is communicated with the expansion machine 2 through a new high-temperature heat exchanger C, the new high-temperature heat exchanger C is communicated with the outside through a heat source medium channel, and the new expansion machine B is connected with the compressor 1 and transmits power.

(2) Compared with the double-working-medium combined cycle compression heat pump shown in the figure 1, the difference of the flow is that the steam discharged by the compressor 1 flows through the high-temperature heat exchanger 7 and absorbs heat, and then enters the new expansion machine B to reduce the pressure and do work; the steam discharged by the newly added expansion machine B flows through the newly added high-temperature heat exchanger C and absorbs heat, and then enters the expansion machine 2 to reduce the pressure and do work; the work output by the new expansion machine B is provided for the compressor 1 as power, and the heat source medium provides driving heat load through the new high-temperature heat exchanger C and the high-temperature heat exchanger 7, so that the double-working-medium combined cycle compression heat pump is formed.

The dual working medium combined cycle compression heat pump shown in fig. 14 is realized by the following steps:

(1) structurally, in the dual-working-medium combined cycle compression heat pump shown in fig. 1, a high-temperature heat regenerator, a newly-added compressor and a newly-added high-temperature heat exchanger are added, a steam channel of the compressor 1 is communicated with the expander 2 through the high-temperature heat exchanger 7 and adjusted to be that the compressor 1 is provided with a steam channel which is communicated with the newly-added compressor A through the high-temperature heat regenerator 26 and the high-temperature heat exchanger 7, a steam channel of the newly-added compressor A is communicated with the expander 2 through the newly-added high-temperature heat exchanger C, a steam channel of the expander 2 is communicated with the hybrid evaporator 9 through the intermediate-temperature evaporator 10 and adjusted to be that the expander 2 is provided with a steam channel which is communicated with the hybrid evaporator 9 through the high-temperature heat regenerator 26 and the intermediate-temperature evaporator 10, the newly-added high-temperature heat.

(2) Compared with the double-working-medium combined cycle compression heat pump shown in fig. 1, the difference in the flow is that the steam discharged by the compressor 1 flows through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 7 and gradually absorbs heat, and then enters the newly-added compressor A to increase the pressure and the temperature; the steam discharged by the newly-added compressor A flows through the newly-added high-temperature heat exchanger C and absorbs heat, and then enters the expander 2 to reduce the pressure and do work; steam discharged by the expansion machine 2 flows through the high-temperature heat regenerator 11 and the medium-temperature evaporator 10 to gradually release heat and then enters the hybrid evaporator 9, the expansion machine 2 provides power for the newly-added compressor A, and a heat source medium provides driving heat load through the newly-added high-temperature heat exchanger C and the high-temperature heat exchanger 7, so that the double-working-medium combined cycle compression heat pump is formed.

The combined cycle steam power plant of fig. 15 is implemented as follows:

in the combined cycle steam power plant shown in fig. 1, the third expander 4 is adjusted to have a steam passage communicating with the heat supplier 8, so that the third expander 4 has a steam passage communicating with the second expander 3; the steam entering the third expansion machine 4 completes partial decompression work, enters the second expansion machine 3 to continue decompression work, and then enters the heat supply device 8 to release heat and condense, thus forming the double-working medium combined cycle compression heat pump.

The dual working medium combined cycle compression heat pump shown in fig. 16 is realized by the following steps:

(1) structurally, in the dual working medium combined cycle compression heat pump shown in fig. 1, the third expander is eliminated, the steam channel for communicating the third expander 4 with the heat supply device 8 is eliminated, the medium temperature evaporator 10 is communicated with the third expander 4 and adjusted to be communicated with the second expander 3 through the steam channel of the medium temperature evaporator 10, and the mixed evaporator 9 and the steam channel are respectively communicated with the compressor 1 and the second expander 3 and adjusted to be communicated with the compressor 1 through the steam channel of the mixed evaporator 9 and communicated with the second expander 3 through the middle steam inlet channel of the mixed evaporator 9.

(2) Compared with the double-working medium combined cycle compression heat pump shown in fig. 1, the difference in the flow is that the steam discharged from the intermediate temperature evaporator 10 flows through the second expander 3 to work by reducing pressure, and then enters the heat supply device 8; the steam discharged from the mixed evaporator 9 enters the second expander 3 through the middle steam inlet channel to perform decompression and work, and then enters the heat supply device 8 to form the double-working-medium combined cycle compression heat pump.

The effect that the technology of the invention can realize-the double-working-medium combined cycle compression heat pump provided by the invention has the following effects and advantages:

(1) provides a new idea and a new technology for utilizing the temperature difference.

(2) The non-phase-change, low-pressure and high-temperature operation mode is adopted in the high-temperature area, the temperature difference loss between the temperature-changing heat source and the circulating medium is greatly reduced, the temperature difference is fully utilized, and the performance index is greatly improved.

(3) The working pressure is reduced, the system safety performance is improved, and the application range is expanded.

(4) And a mixed evaporator is adopted, so that the heat transfer link is reduced, and the heat efficiency is improved.

(5) The graded evaporation realizes reasonable utilization of temperature difference, reduces irreversible loss of heat transfer and improves the utilization rate of heat energy.

(6) Double working medium circulation greatly expands the range of working parameters.

(7) Can realize cold supply or heat supply independently, and can provide cold and heat cogeneration, cold and power cogeneration, heat and power cogeneration or cold and heat power cogeneration simultaneously.

(8) The effective utilization of heat energy (temperature difference) is realized independently or the effective utilization of heat energy and mechanical energy is realized simultaneously.

(9) And heat supply at two ends is realized in the flow of the compression heat pump, so that the performance index is improved, and the energy utilization rate is improved.

(10) The reasonable technical scheme is provided for effectively realizing the reasonable utilization of non-high-quality fuel, a high-temperature heat source and a variable-temperature heat source in the refrigeration/heat supply field and simultaneously considering the power supply or the effective utilization of mechanical energy.

Claims

1. The double-working medium combined cycle compression heat pump mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supplier, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander and a second heat supplier; the heat supplier (8) is provided with a condensate pipeline which is communicated with the mixing evaporator (9) through the circulating pump (5), the expander (2) is provided with a steam channel which is communicated with the mixing evaporator (9) through the intermediate temperature evaporator (10), the mixing evaporator (9) is also provided with a steam channel which is respectively communicated with the compressor (1) and the second expander (3), the compressor (1) is also provided with a steam channel which is communicated with the expander (2) through the high temperature heat exchanger (7), and the second expander (3) is also provided with a steam channel which is communicated with the heat supplier (8); the heat supply device (8) is also provided with a condensate pipeline which is communicated with the medium temperature evaporator (10) through a second circulating pump (6), then the medium temperature evaporator (10) is communicated with a third expansion machine (4) through a steam channel, and the third expansion machine (4) is also provided with a steam channel which is communicated with the heat supply device (8); a low-temperature heat medium channel is arranged outside and communicated with the second compressor (11), the second compressor (11) is also provided with a low-temperature heat medium channel which is communicated with a fourth expander (12) through a second heat supply device (13), and the fourth expander (12) is also provided with a low-temperature heat medium channel which is communicated with the outside; the high-temperature heat exchanger (7) is also provided with a heat source medium channel communicated with the outside, the heat supplier (8) and the second heat supplier (13) are also provided with a heated medium channel communicated with the outside, and the expander (2), the second expander (3), the third expander (4) and the fourth expander (12) are connected with the compressor (1) and the second compressor (11) and transmit power, so that the double-working-medium combined cycle compression heat pump is formed.

2. The double-working medium combined cycle compression heat pump mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supplier, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander, a second heat supplier and a low-temperature heat regenerator; the heat supplier (8) is provided with a condensate pipeline which is communicated with the mixing evaporator (9) through the circulating pump (5), the expander (2) is provided with a steam channel which is communicated with the mixing evaporator (9) through the intermediate temperature evaporator (10), the mixing evaporator (9) is also provided with a steam channel which is respectively communicated with the compressor (1) and the second expander (3), the compressor (1) is also provided with a steam channel which is communicated with the expander (2) through the high temperature heat exchanger (7), and the second expander (3) is also provided with a steam channel which is communicated with the heat supplier (8); the heat supply device (8) is also provided with a condensate pipeline which is communicated with the medium temperature evaporator (10) through a second circulating pump (6), then the medium temperature evaporator (10) is communicated with a third expansion machine (4) through a steam channel, and the third expansion machine (4) is also provided with a steam channel which is communicated with the heat supply device (8); a low-temperature heat medium channel is arranged outside and is communicated with a second compressor (11) through a low-temperature heat regenerator (14), the second compressor (11) is also provided with a low-temperature heat medium channel which is communicated with a fourth expander (12) through a second heat supplier (13) and the low-temperature heat regenerator (14), and the fourth expander (12) is also provided with a low-temperature heat medium channel which is communicated with the outside; the high-temperature heat exchanger (7) is also provided with a heat source medium channel communicated with the outside, the heat supplier (8) and the second heat supplier (13) are also provided with a heated medium channel communicated with the outside, and the expander (2), the second expander (3), the third expander (4) and the fourth expander (12) are connected with the compressor (1) and the second compressor (11) and transmit power, so that the double-working-medium combined cycle compression heat pump is formed.

3. The double-working medium combined cycle compression heat pump mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supplier, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander, a second heat supplier and a low-temperature heat exchanger; the heat supplier (8) is provided with a condensate pipeline which is communicated with the mixing evaporator (9) through the circulating pump (5), the expander (2) is provided with a steam channel which is communicated with the mixing evaporator (9) through the intermediate temperature evaporator (10), the mixing evaporator (9) is also provided with a steam channel which is respectively communicated with the compressor (1) and the second expander (3), the compressor (1) is also provided with a steam channel which is communicated with the expander (2) through the high temperature heat exchanger (7), and the second expander (3) is also provided with a steam channel which is communicated with the heat supplier (8); the heat supply device (8) is also provided with a condensate pipeline which is communicated with the medium temperature evaporator (10) through a second circulating pump (6), then the medium temperature evaporator (10) is communicated with a third expansion machine (4) through a steam channel, and the third expansion machine (4) is also provided with a steam channel which is communicated with the heat supply device (8); the second compressor (11) is provided with a circulating medium channel which is communicated with the fourth expander (12) through a second heat supply device (13), and the fourth expander (12) is also provided with a circulating medium channel which is communicated with the second compressor (11) through a low-temperature heat exchanger (15); the high-temperature heat exchanger (7) is also provided with a heat source medium channel communicated with the outside, the heat supplier (8) and the second heat supplier (13) are also provided with heated medium channels communicated with the outside, the low-temperature heat exchanger (15) is also provided with a low-temperature heat medium channel communicated with the outside, and the expander (2), the second expander (3), the third expander (4) and the fourth expander (12) are connected with the compressor (1) and the second compressor (11) and transmit power to form the dual-working-medium combined cycle compression heat pump.

4. The dual-working medium combined cycle compression heat pump mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supplier, a mixed evaporator, a medium-temperature evaporator, a second compressor, a fourth expander, a second heat supplier, a low-temperature heat regenerator and a low-temperature heat exchanger; the heat supplier (8) is provided with a condensate pipeline which is communicated with the mixing evaporator (9) through the circulating pump (5), the expander (2) is provided with a steam channel which is communicated with the mixing evaporator (9) through the intermediate temperature evaporator (10), the mixing evaporator (9) is also provided with a steam channel which is respectively communicated with the compressor (1) and the second expander (3), the compressor (1) is also provided with a steam channel which is communicated with the expander (2) through the high temperature heat exchanger (7), and the second expander (3) is also provided with a steam channel which is communicated with the heat supplier (8); the heat supply device (8) is also provided with a condensate pipeline which is communicated with the medium temperature evaporator (10) through a second circulating pump (6), then the medium temperature evaporator (10) is communicated with a third expansion machine (4) through a steam channel, and the third expansion machine (4) is also provided with a steam channel which is communicated with the heat supply device (8); the second compressor (11) is provided with a circulating medium channel which is communicated with the fourth expander (12) through a second heat supply device (13) and a low-temperature heat regenerator (14), and the fourth expander (12) is also provided with a circulating medium channel which is communicated with the second compressor (11) through a low-temperature heat exchanger (15) and the low-temperature heat regenerator (14); the high-temperature heat exchanger (7) is also provided with a heat source medium channel communicated with the outside, the heat supplier (8) and the second heat supplier (13) are also provided with heated medium channels communicated with the outside, the low-temperature heat exchanger (15) is also provided with a low-temperature heat medium channel communicated with the outside, and the expander (2), the second expander (3), the third expander (4) and the fourth expander (12) are connected with the compressor (1) and the second compressor (11) and transmit power to form the dual-working-medium combined cycle compression heat pump.

5. The double-working medium combined cycle compression heat pump mainly comprises a compressor, an expander, a second expander, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a heat supplier, a mixed evaporator, a medium-temperature evaporator, a second compressor, a second heat supplier, a throttle valve and an evaporator; the heat supplier (8) is provided with a condensate pipeline which is communicated with the mixing evaporator (9) through the circulating pump (5), the expander (2) is provided with a steam channel which is communicated with the mixing evaporator (9) through the intermediate temperature evaporator (10), the mixing evaporator (9) is also provided with a steam channel which is respectively communicated with the compressor (1) and the second expander (3), the compressor (1) is also provided with a steam channel which is communicated with the expander (2) through the high temperature heat exchanger (7), and the second expander (3) is also provided with a steam channel which is communicated with the heat supplier (8); the heat supply device (8) is also provided with a condensate pipeline which is communicated with the medium temperature evaporator (10) through a second circulating pump (6), then the medium temperature evaporator (10) is communicated with a third expansion machine (4) through a steam channel, and the third expansion machine (4) is also provided with a steam channel which is communicated with the heat supply device (8); the second compressor (11) is provided with a circulating medium channel which is communicated with the second heat supply device (13), the second heat supply device (13) is also provided with a circulating medium channel which is communicated with the evaporator (17) through a throttle valve (16), and the evaporator (17) is also provided with a circulating medium channel which is communicated with the second compressor (11); the high-temperature heat exchanger (7) is also provided with a heat source medium channel communicated with the outside, the heat supplier (8) and the second heat supplier (13) are also provided with heated medium channels communicated with the outside, the evaporator (17) is also provided with a low-temperature heat medium channel communicated with the outside, and the expander (2), the second expander (3) and the third expander (4) are connected with the compressor (1) and the second compressor (11) and transmit power to form the dual-working-medium combined cycle compression heat pump.

6. A dual working medium combined cycle compression heat pump is characterized in that in any one of the dual working medium combined cycle compression heat pumps disclosed by claims 1-5, a heat regenerator and a third circulating pump are added, a heat supply device (8) is communicated with a mixed evaporator (9) through the circulating pump (5) and adjusted to be that the heat supply device (8) is communicated with the heat regenerator (18) through the circulating pump (5) and a condensed liquid pipeline is arranged on the heat regenerator (8), a second expansion machine (3) or a third expansion machine (4) is additionally provided with a steam extraction channel to be communicated with the heat regenerator (18), and the heat regenerator (18) is further communicated with the mixed evaporator (9) through the third circulating pump (20) through the condensed liquid pipeline, so that the dual working medium combined cycle compression heat pump is formed.

7. A dual working medium combined cycle compression heat pump is characterized in that in any one of the dual working medium combined cycle compression heat pumps disclosed by claims 1-5, a heat regenerator and a third circulating pump are added, a condensing liquid pipeline of a heat supplier (8) is communicated with a medium temperature evaporator (10) through a second circulating pump (6) and adjusted to be communicated with a condensing liquid pipeline of the heat supplier (8) and communicated with a heat regenerator (18) through the second circulating pump (6), an extraction channel is additionally arranged on a second expander (3) or a third expander (4) and communicated with the heat regenerator (18), and the condensing liquid pipeline of the heat regenerator (18) is communicated with the medium temperature evaporator (10) through a third circulating pump (20) to form the dual working medium combined cycle compression heat pump.

8. A dual-working medium combined cycle compression heat pump is characterized in that in any one of the dual-working medium combined cycle compression heat pumps disclosed by claims 1-5, a heat regenerator, a second heat regenerator, a third circulating pump and a fourth circulating pump are added, a condensing liquid pipeline of a heat supply device (8) is communicated with a mixed evaporator (9) through the circulating pump (5) and adjusted to be that the condensing liquid pipeline of the heat supply device (8) is communicated with a heat regenerator (18) through the circulating pump (5), a steam extraction channel is additionally arranged on a second expansion machine (3) or a third expansion machine (4) and is communicated with the heat regenerator (18), and the condensing liquid pipeline of the heat regenerator (18) is communicated with the mixed evaporator (9) through the third circulating pump (20); a heat supply device (8) is provided with a condensate pipeline which is communicated with a medium-temperature evaporator (10) through a second circulating pump (6) and adjusted to be that the heat supply device (8) is provided with a condensate pipeline which is communicated with a second heat regenerator (19) through the second circulating pump (6), a steam extraction channel is additionally arranged on a second expansion machine (3) or a third expansion machine (4) and is communicated with the second heat regenerator (19), and the second heat regenerator (19) is further provided with a condensate pipeline which is communicated with the medium-temperature evaporator (10) through a fourth circulating pump (21), so that a double-working medium combined cycle compression heat pump is formed.

9. A dual working medium combined cycle compression heat pump is characterized in that in any one of the dual working medium combined cycle compression heat pumps disclosed by claims 1-5, a preheater is added, a heat supply device (8) is provided with a condensate pipeline which is communicated with a mixed evaporator (9) through a circulating pump (5) and is adjusted to be that the heat supply device (8) is provided with a condensate pipeline which is communicated with the mixed evaporator (9) through the circulating pump (5) and the preheater (22), and the preheater (22) is also provided with a heat source medium channel which is communicated with the outside, so that the dual working medium combined cycle compression heat pump is formed.

10. A dual working medium combined cycle compression heat pump is characterized in that in any one of the dual working medium combined cycle compression heat pumps disclosed by claims 1-5, a preheater is added, a heat supply device (8) is provided with a condensate pipeline which is communicated with a medium temperature evaporator (10) through a second circulating pump (6) and is adjusted to be that the heat supply device (8) is provided with a condensate pipeline which is communicated with the medium temperature evaporator (10) through the second circulating pump (6) and the preheater (22), and the preheater (22) is also provided with a heat source medium channel which is communicated with the outside, so that the dual working medium combined cycle compression heat pump is formed.

11. A dual working medium combined cycle compression heat pump is characterized in that in any one of the dual working medium combined cycle compression heat pumps disclosed by claims 1-5, a preheater and a second preheater are added, a condensing liquid pipeline of a heat supply device (8) is communicated with a mixing evaporator (9) through a circulating pump (5) and is adjusted to be communicated with the mixing evaporator (9) through the circulating pump (5) and the preheater (22), a condensing liquid pipeline of the heat supply device (8) is communicated with the mixing evaporator (9) through the second circulating pump (6) and the medium temperature evaporator (10) through the second circulating pump (6) and is adjusted to be communicated with the medium temperature evaporator (10) through the condensing liquid pipeline of the heat supply device (8) through the second circulating pump (6) and the second preheater (23), and the preheater (22) and the second preheater (23) are respectively communicated with the outside through a heat source medium channel, so as to form the dual working medium combined cycle compression heat pump.

12. A dual working medium combined cycle compression heat pump, which is in any one of the dual working medium combined cycle compression heat pumps described in the claims 1-5, a preheater and a second preheater are added, a condensate pipeline of the heat supply device (8) is communicated with the mixing evaporator (9) through a circulating pump (5), a condensate pipeline of the heat supply device (8) is communicated with the medium-temperature evaporator (10) through a second circulating pump (6), the heat supply device (8) is adjusted to be divided into two paths after the condensate pipeline of the heat supply device (8) passes through the circulating pump (5) and the preheater (22), the first path is directly communicated with the mixing evaporator (7), the second path is communicated with the medium-temperature evaporator (10) through the second circulating pump (6) and the second preheater (23), and the preheater (22) and the second preheater (23) are also respectively communicated with the outside through a heat source medium channel to form a dual-working medium combined cycle compression heat pump.

13. A dual-working medium combined cycle compression heat pump is characterized in that in any one of the dual-working medium combined cycle compression heat pumps disclosed by claims 1-12, an intermediate reheater is added, a medium temperature evaporator (10) is communicated with a third expander (4) through a steam channel, the third expander (4) is communicated with a heat supply device (8) through a steam channel, the medium temperature evaporator (10) is adjusted to be communicated with the third expander (4) through a steam channel, the third expander (4) and an intermediate reheated steam channel are communicated with the third expander (4) through an intermediate reheater (24), the third expander (4) and a steam channel are communicated with the heat supply device (8), and the intermediate reheater (24) and a heat source medium channel are communicated with the outside to form the dual-working medium combined cycle compression heat pump.

14. A dual working medium combined cycle compression heat pump is characterized in that in any one of the dual working medium combined cycle compression heat pumps disclosed by claims 1-5, a third heat supply device is added, a steam channel of the third expander (4) is communicated with the heat supply device (8) and adjusted to be communicated with the third expander (4) by the steam channel and communicated with the third heat supply device (25), a condensate pipeline of the heat supply device (8) is communicated with the medium temperature evaporator (10) by a second circulating pump (6) and adjusted to be communicated with the medium temperature evaporator (10) by the third heat supply device (25) by the condensate pipeline communicated with the medium temperature evaporator (10) by the second circulating pump (6), and a heated medium channel of the third heat supply device (25) is communicated with the outside to form the dual working medium combined cycle compression heat pump.

15. A dual working medium combined cycle compression heat pump is characterized in that in any one of the dual working medium combined cycle compression heat pumps disclosed by claims 1-14, a high-temperature heat regenerator is added, a steam channel of a compressor (1) is communicated with an expander (2) through a high-temperature heat exchanger (7) and adjusted to be that the compressor (1) is provided with the steam channel which is communicated with the expander (2) through the high-temperature heat regenerator (26) and the high-temperature heat exchanger (7), and the expander (2) is provided with the steam channel which is communicated with a hybrid evaporator (9) through a medium-temperature evaporator (10) and adjusted to be that the expander (2) is provided with the steam channel which is communicated with the hybrid evaporator (9) through the high-temperature heat regenerator (26) and the medium-temperature evaporator (10), so as to form the dual working medium.

16. A dual working medium combined cycle compression heat pump is characterized in that any one of the dual working medium combined cycle compression heat pumps described in claims 1-14 is added with a newly-added compressor and a newly-added high temperature heat exchanger, a steam channel of the compressor (1) is communicated with an expander (2) through the high temperature heat exchanger (7) and is adjusted to be that the compressor (1) is provided with a steam channel which is communicated with the newly-added compressor (A) through the high temperature heat exchanger (7), the newly-added compressor (A) is provided with a steam channel which is communicated with the expander (2) through the newly-added high temperature heat exchanger (C), the newly-added high temperature heat exchanger (C) is also provided with a heat source medium channel which is communicated with the outside, and the expander (

(A) And transmits power to form the double-working-medium combined cycle compression heat pump.

17. A dual-working medium combined cycle compression heat pump is characterized in that a new expansion machine and a new high-temperature heat exchanger are added in any dual-working medium combined cycle compression heat pump of claims 1-14, a steam channel of a compressor (1) is communicated with an expansion machine (2) through the high-temperature heat exchanger (7) and adjusted to be that the compressor (1) is provided with a steam channel which is communicated with a new expansion machine (B) through the high-temperature heat exchanger (7), the new expansion machine (B) is further provided with a steam channel which is communicated with the expansion machine (2) through the new high-temperature heat exchanger (C), the new high-temperature heat exchanger (C) is further provided with a heat source medium channel which is communicated with the outside, and the new expansion machine (B) is connected with the compressor (1) and transmits power to form the dual-working medium combined.

18. A dual-working medium combined cycle compression heat pump is characterized in that in any one of the dual-working medium combined cycle compression heat pumps described in claims 1-14, a high-temperature heat regenerator, a newly-added compressor and a newly-added high-temperature heat exchanger are added, a steam channel of the compressor (1) is communicated with an expander (2) through the high-temperature heat exchanger (7) and is adjusted to be communicated with the newly-added compressor (A) through the high-temperature heat regenerator (26) and the high-temperature heat exchanger (7), a steam channel of the newly-added compressor (A) is communicated with the expander (2) through the newly-added high-temperature heat exchanger (C), a steam channel of the expander (2) is communicated with a hybrid evaporator (9) through a medium-temperature evaporator (10) and is adjusted to be communicated with the hybrid evaporator (9) through the high-temperature heat regenerator (26) and the medium-temperature evaporator (10), the newly-added high-temperature heat exchanger (C) is also communicated with the outside through a heat source medium channel, the expansion machine (2) is connected with the newly-added compressor (A) and transmits power to form the double-working-medium combined cycle compression heat pump.

19. A dual-working medium combined cycle compression heat pump is characterized in that in any one of the dual-working medium combined cycle compression heat pumps disclosed by claims 1-14, a high-temperature heat regenerator, a new expansion machine and a new high-temperature heat exchanger are added, a steam channel of a compressor (1) is communicated with an expansion machine (2) through the high-temperature heat exchanger (7) and is adjusted to be communicated with the new expansion machine (B) through the high-temperature heat regenerator (26) and the high-temperature heat exchanger (7), a steam channel of the new expansion machine (B) is communicated with the expansion machine (2) through the new high-temperature heat exchanger (C), a steam channel of the expansion machine (2) is communicated with a mixed evaporator (9) through a medium-temperature evaporator (10) and is adjusted to be communicated with the mixed evaporator (9) through the high-temperature heat regenerator (26) and the medium-temperature evaporator (10), the new high-temperature heat exchanger (C) is also communicated with the outside, the new expansion machine (B) is connected with the compressor (1) and transmits power to form a double-working-medium combined cycle compression heat pump.

20. A dual working medium combined cycle compression heat pump is characterized in that in any one of the dual working medium combined cycle compression heat pumps disclosed by claims 1-13 and 15-19, a third expansion machine (4) is communicated with a heat supply device (8) through a steam channel, and the third expansion machine (4) is communicated with a second expansion machine (3) through the steam channel, so that the dual working medium combined cycle compression heat pump is formed.

21. A dual working medium combined cycle compression heat pump is disclosed in any one of claims 1-13 and 15-19, wherein a third expander is omitted, a steam channel for communicating the third expander (4) with a heat supply device (8) is omitted, a medium temperature evaporator (10) with a steam channel is communicated with the third expander (4) and adjusted to be a medium temperature evaporator (10) with a steam channel communicated with a second expander (3), a mixed evaporator (9) and a steam channel are respectively communicated with a compressor (1) and the second expander (3) and adjusted to be a mixed evaporator (9) with a steam channel communicated with the compressor (1) and a middle steam inlet channel communicated with the second expander (3) to form the dual working medium combined cycle compression heat pump.

22. A dual working medium combined cycle compression heat pump is characterized in that in any one of the dual working medium combined cycle compression heat pumps disclosed by claims 1-21, a heat source medium channel is additionally arranged on a mixing evaporator (9) or a medium temperature evaporator (10) to be communicated with the outside, so that the dual working medium combined cycle compression heat pump is formed.

23. A dual working medium combined cycle compression heat pump is characterized in that in any one of the dual working medium combined cycle compression heat pumps disclosed by claims 1-21, a mixing evaporator (9) and a medium temperature evaporator (10) are respectively provided with a heat source medium channel to be communicated with the outside, so that the dual working medium combined cycle compression heat pump is formed.

24. A dual-working medium combined cycle compression heat pump is characterized in that a power machine is added in the dual-working medium combined cycle compression heat pump of any one of claims 1 to 23, the power machine is connected with a second compressor (11) and provides power for the second compressor (11), and the dual-working medium combined cycle compression heat pump driven by additional external power is formed.

25. A dual working medium combined cycle compression heat pump is characterized in that a working machine is added in the dual working medium combined cycle compression heat pump of any one of claims 1 to 23, and an expansion machine (2) is connected with the working machine and supplies power to the working machine to form the dual working medium combined cycle compression heat pump which additionally supplies power load to the outside.