Reflux booster vapor compression heat pump

Abstract

The application provides a backflow pressure-boosting vapor compression heat pump, and belongs to the technical field of refrigeration and heat pump. A low-temperature heat exchanger has a circulating working medium passage in communication with a compressor, a separated vapor chamber has a circulating working medium passage in communication with the compressor through an intermediate inlet, an expander is connected to the compressor through an intermediate port after a regenerator, the compressor has a circulating working medium passage and a second nozzle has a first circulating working medium passage, and the two are connected to a diffuser. The diffuser has a circulating working medium passage which is divided into two routes after a heat supplier, i.e. a first route connected to the second nozzle and a second route connected to the regenerator. The second nozzle has a circulating working medium passage which is divided into two routes, i.e. a first circulating working medium passage connected to the diffuser and a second circulating working medium passage connected to the expander. The regenerator has a circulating working medium passage connected to the separated vapor chamber through a nozzle, and the separated vapor chamber is connected to the low-temperature heat exchanger through a throttle valve. The heat supplier has a heated medium passage, and the low-temperature heat exchanger has a low-temperature heat medium passage connected to the outside, thereby forming the backflow pressure-boosting vapor compression heat pump.

Description

Technical fields:

[0001] This invention belongs to the field of refrigeration and heat pump technology. Background technology:

[0002] Combined cycle vapor compression heat pumps can achieve efficient cooling and high-temperature heating; as the energy transition continues to deepen, people hope that heat pump technology will have more reasonable processes, structures and performance indices; to this end, those skilled in the art have made unremitting efforts.

[0003] Looking at the main components of a vapor compression heat pump, the compressor and expander are essential core components. Through years of theoretical research and engineering practice, and after in-depth consideration and careful analysis, we have found that:

[0004] From the perspective of energy conversion and transfer, there is a repetition between the pressurization process of the circulating working fluid in the compressor and the depressurization process in the expander. This not only complicates the compressor and expander but also increases the systemic irreversible losses. Therefore, efforts should be made to reduce the repetitive process between the pressurization process of the compressor and the depressurization process of the expander.

[0005] Based on the fundamental principles of simple and efficient use of mechanical energy for refrigeration / heating, and with the aim of reducing repetitive processes in the system, a reflux booster vapor compression heat pump with a reasonable process, simple system, and the ability to achieve efficient refrigeration and high-temperature heating is proposed. Summary of the Invention:

[0006] The main objective of this invention is to provide a reflux-pressurized vapor compression heat pump, the specific contents of which are described below:

[0007] 1. A recirculating, pressurized steam compression heat pump mainly consists of a compressor, expander, regenerator, heater, nozzle, steam distribution chamber, throttling valve, low-temperature heat exchanger, diffuser, and second nozzle. The low-temperature heat exchanger has a circulating working fluid channel connected to the compressor. The steam distribution chamber has a circulating working fluid channel connected to the compressor via an intermediate inlet. The expander has a circulating working fluid channel connected to the regenerator and then to the compressor via an intermediate port. The compressor has a circulating working fluid channel, and the second nozzle has a first circulating working fluid channel; both converge and connect to the diffuser. The diffuser also has a circulating working fluid channel connected to the heater. The system then splits into two paths—the first path connects to the second nozzle, and the second path connects to the regenerator. The second nozzle also has a circulating working fluid channel that splits into two paths—the first circulating working fluid channel connects to the diffuser, and the second circulating working fluid channel connects to the expander. The regenerator also has a circulating working fluid channel that connects to the steam distribution chamber via the nozzle. The steam distribution chamber also has a circulating working fluid channel that connects to the low-temperature heat exchanger via a throttling valve. The heater also has a heated medium channel that connects to the outside, and the low-temperature heat exchanger also has a low-temperature heat medium channel that connects to the outside. The expander connects to the compressor and transmits power, forming a reflux-pressurized steam compression heat pump.

[0008] 2. A recirculation-pressurized vapor compression heat pump is a recirculation-pressurized vapor compression heat pump described in item 1, in which a two-phase expander is added and replaces the throttle valve. The two-phase expander is connected to the compressor and transmits power to form a recirculation-pressurized vapor compression heat pump.

[0009] 3. A recirculation-pressurized vapor compression heat pump is formed by adding a third nozzle to the recirculation-pressurized vapor compression heat pump described in item 1 and replacing the throttle valve, and adding a dual-energy compressor and replacing the compressor.

[0010] 4. A recirculation-pressurized vapor compression heat pump is formed by adding a third nozzle to the recirculation-pressurized vapor compression heat pump described in item 1, replacing the throttle valve, adding a dual-energy compressor to replace the compressor, and adding an expander speed increaser to replace the expander.

[0011] 5. A reflux-pressurized steam compression heat pump mainly consists of a compressor, expander, regenerator, heater, nozzle, steam distribution chamber, throttling valve, low-temperature heat exchanger, diffuser, second nozzle, and second regenerator. The low-temperature heat exchanger has a circulating working fluid channel that connects to the compressor via the second regenerator. The steam distribution chamber has a circulating working fluid channel that connects to the compressor via an intermediate inlet. The expander has a circulating working fluid channel that connects to the regenerator and then to the compressor via an intermediate port. The compressor has a circulating working fluid channel, and the second nozzle has a first circulating working fluid channel; both converge and connect to the diffuser. The diffuser also has a circulating working fluid channel that connects to the heater. The system is connected to the compressor and then splits into two paths: the first path connects to the second nozzle and the second path connects to the regenerator. The second nozzle also has a circulating working fluid channel that splits into two paths: the first circulating working fluid channel connects to the diffuser and the second circulating working fluid channel connects to the expander. The regenerator also has a circulating working fluid channel that connects to the steam distribution chamber via the second regenerator and the nozzle. The steam distribution chamber also has a circulating working fluid channel that connects to the low-temperature heat exchanger via a throttling valve. The heater also has a heated medium channel that connects to the outside, and the low-temperature heat exchanger also has a low-temperature heat medium channel that connects to the outside. The expander connects to the compressor and transmits power, forming a reflux-pressurized steam compression heat pump.

[0012] 6. A recirculation-pressurized vapor compression heat pump is a recirculation-pressurized vapor compression heat pump described in item 5, in which a two-phase expander is added and replaces the throttle valve. The two-phase expander is connected to the compressor and transmits power to form a recirculation-pressurized vapor compression heat pump.

[0013] 7. A recirculation-pressurized vapor compression heat pump is formed by adding a third nozzle to the recirculation-pressurized vapor compression heat pump described in item 5, replacing the throttle valve, and adding a dual-energy compressor to replace the compressor.

[0014] 8. A recirculation-pressurized vapor compression heat pump is formed by adding a third nozzle to the recirculation-pressurized vapor compression heat pump described in item 5, replacing the throttle valve, adding a dual-energy compressor to replace the compressor, and adding an expander speed increaser to replace the expander.

[0015] 9. A reflux-pressurized vapor compression heat pump, wherein in any of the reflux-pressurized vapor compression heat pumps described in items 1-8, the diffuser tube, after being connected to the heater with a circulating working fluid channel, is divided into two paths—the first path is connected to the second nozzle and the second path is connected to the regenerator; the second nozzle, after being connected to the diffuser tube with a circulating working fluid channel, is divided into two paths—the first circulating working fluid channel is connected to the diffuser tube and the second circulating working fluid channel is connected to the expander; and the pressure tube, after being connected to the heater with a circulating working fluid channel, is divided into three paths—the first path is connected to the second nozzle tube and then to the diffuser tube, the second path is connected to the expander, and the third path is connected to the regenerator, thus forming a reflux-pressurized vapor compression heat pump.

[0016] 10. A recirculating pressurized vapor compression heat pump is formed by adding a new compressor to any of the recirculating pressurized vapor compression heat pumps described in items 1-9, and adjusting the diffuser tube from having a circulating working fluid channel connected to the heater to having a circulating working fluid channel connected to the heater after passing through the new compressor, thus forming a recirculating pressurized vapor compression heat pump.

[0017] 11. A recirculating pressurized vapor compression heat pump is any one of the recirculating pressurized vapor compression heat pumps described in items 1-10, with the addition of an ejector chamber. The compressor has a circulating working fluid channel and the nozzle has a first circulating working fluid channel, which are then connected to the diffuser. The compressor has a circulating working fluid channel connected to the ejector chamber, the nozzle has a first circulating working fluid channel connected to the ejector chamber, and the ejector chamber has a circulating working fluid channel connected to the diffuser, thus forming a recirculating pressurized vapor compression heat pump.

[0018] 12. A recirculating pressurized vapor compression heat pump is a heat pump in any of the recirculating pressurized vapor compression heat pumps described in items 1-11, wherein the regenerator is provided with a channel for the heated medium that is connected to the outside, thereby forming a recirculating pressurized vapor compression heat pump. Attached image description:

[0019] Figure 1 This is a principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0020] Figure 2 This is a schematic diagram of the second principle thermodynamic system of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0021] Figure 3 This is a third principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0022] Figure 4 This is a fourth principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0023] Figure 5 This is a fifth principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0024] Figure 6 This is a schematic diagram of the sixth principle thermodynamic system of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0025] Figure 7 This is the seventh principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0026] Figure 8 This is the eighth principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0027] Figure 9 This is the ninth principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0028] Figure 10 This is the tenth principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0029] Figure 11 This is the 11th principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0030] In the diagram, 1-compressor, 2-expander, 3-regenerator, 4-heater, 5-nozzle, 6-steam chamber, 7-throttle valve, 8-low temperature heat exchanger, 9-diffuser, 10-second nozzle, 11-two-phase expander, 12-thirteenth nozzle, 13-dual-energy compressor, 14-expander speed-up unit, 15-second regenerator; A-new compressor, B-ejector chamber.

[0031] Regarding the ejection chamber, it should be noted that:

[0032] Appendix Figure 11 The ejector chamber B is where the high-speed circulating working fluid discharged from the nozzle 10 meets the ejected circulating working fluid; in other words, the ejector chamber B includes both the outlet circulating working fluid passage of the nozzle 10 and the outlet circulating working fluid passage of the compressor 1; therefore, attached... Figure 1-10 In the technical solution shown, the "ejector chamber" is implicit in the circulating working medium channel, and this application chooses not to describe it. Detailed implementation method:

[0033] First, it should be noted that the structure and process are not repeated unless necessary, and obvious processes are not described. The invention will now be described in detail with reference to the accompanying drawings and examples.

[0034] Figure 1 The reflux booster vapor compression heat pump shown is implemented as follows:

[0035] (1) Structurally, it mainly consists of a compressor, expander, regenerator, heater, nozzle, steam distribution chamber, throttle valve, low-temperature heat exchanger, diffuser, and second nozzle; the low-temperature heat exchanger 8 has a circulating working fluid channel connected to the compressor 1, the steam distribution chamber 6 has a circulating working fluid channel connected to the compressor 1 through an intermediate inlet, the expander 2 has a circulating working fluid channel connected to the regenerator 3 and then connected to the compressor 1 through an intermediate port, the compressor 1 has a circulating working fluid channel and the second nozzle 10 has a first circulating working fluid channel, the two merge and connect to the diffuser 9, the diffuser 9 also has a circulating working fluid channel connected to the heater 4. The circuit is connected to the compressor 1 and then splits into two paths: the first path connects to the second nozzle 10 and the second path connects to the regenerator 3. The second nozzle 10 also has a circulating working fluid channel that splits into two paths: the first circulating working fluid channel connects to the diffuser 9 and the second circulating working fluid channel connects to the expander 2. The regenerator 3 also has a circulating working fluid channel that connects to the steam distribution chamber 6 via the nozzle 5. The steam distribution chamber 6 also has a circulating working fluid channel that connects to the low-temperature heat exchanger 8 via the throttle valve 7. The heater 4 also has a heated medium channel that connects to the outside, and the low-temperature heat exchanger 8 also has a low-temperature heat medium channel that connects to the outside. The expander 2 is connected to the compressor 1 and transmits power.

[0036] (2) In terms of process, the circulating working fluid discharged from compressor 1 is injected and merged by the circulating working fluid from the second nozzle 10 and enters the diffuser 9 to reduce speed and increase pressure. It flows through the heater 4 to release heat and reduce temperature, and then is supplied to the second nozzle 10 and the regenerator 3 respectively. After the circulating working fluid flows through the second nozzle 10 to reduce pressure and increase speed, it is divided into two paths - the first path is supplied to the diffuser 9, and the second path flows through the expander 2 to reduce speed and reduce pressure to do work, flows through the regenerator 3 to absorb heat and increase temperature, and enters the compressor 1 through the intermediate air inlet port to increase pressure and temperature or increase pressure and temperature and increase speed. The circulating working fluid flows through the regenerator 3 to release heat and condense, and the regenerator 3 discharges heat. The released condensate flows through the nozzle 5 to reduce pressure and increase speed, and then enters the steam separator 6 for gas-liquid separation. The refrigerant vapor released from the steam separator 6 enters the compressor 1 through the intermediate inlet to increase pressure and temperature. The condensate discharged from the steam separator 6 flows through the throttle valve 7 to reduce pressure and temperature, and then flows through the low-temperature heat exchanger 8 to absorb heat and evaporate or to be further superheated. After that, it enters the compressor 1 to increase pressure and temperature or to increase pressure, temperature and speed. The expander 2 and the outside provide power to the compressor 1. The heated medium obtains a high-temperature heat load through the heater 4, and the low-temperature heat medium obtains a low-temperature heat load through the low-temperature heat exchanger 8, forming a reflux pressurized steam compression heat pump.

[0037] Figure 2The reflux booster vapor compression heat pump shown is implemented as follows:

[0038] (1) Structurally, in Figure 1 In the reflux booster vapor compression heat pump shown, a two-phase expander 11 is added and replaces the throttle valve 7. The two-phase expander 11 is connected to the compressor 1 and transmits power.

[0039] (2) In terms of process, with Figure 1 Compared with the reflux boosting vapor compression heat pump shown, the difference is that the condensate discharged from the steam separator 6 flows through the two-phase expander 11 to reduce pressure and do work, and then enters the low-temperature heat exchanger 8 to absorb heat and vaporize; the mechanical energy output by the two-phase expander 11 provides power to the compressor 1, forming a reflux boosting vapor compression heat pump.

[0040] Figure 3 The reflux booster vapor compression heat pump shown is implemented as follows:

[0041] (1) Structurally, in Figure 1 In the reflux boosting steam compression heat pump shown, a third nozzle 12 is added and replaces the throttle valve 7, and a dual-energy compressor 13 is added and replaces the compressor 1.

[0042] (2) In terms of process, with Figure 1 Compared to the reflux-pressurized vapor compression heat pump shown, the difference is that the condensate discharged from the steam distribution chamber 6 flows through the third nozzle 12 to reduce pressure and increase speed, flows through the low-temperature heat exchanger 8 to absorb heat and vaporize, and then enters the dual-energy compressor 13 to reduce speed and increase pressure, forming a reflux-pressurized vapor compression heat pump.

[0043] Figure 4 The reflux booster vapor compression heat pump shown is implemented as follows:

[0044] (1) Structurally, in Figure 1 In the reflux booster steam compression heat pump shown, a third nozzle 12 is added and replaces the throttle valve 7, a dual-energy compressor 13 is added and replaces the compressor 1, and an expander speed increaser 14 is added and replaces the expander 2.

[0045] (2) In terms of process, with Figure 1 Compared to the reflux-pressurized vapor compression heat pump shown, the difference lies in the following: the condensate discharged from the steam distribution chamber 6 flows through the third nozzle 12 to reduce pressure and increase speed, flows through the low-temperature heat exchanger 8 to absorb heat and vaporize, and then enters the dual-energy compressor 13 to reduce speed and increase pressure; the second circulating working fluid discharged from the second nozzle 10 flows through the expander speed increaser 14 to reduce pressure and do work and increase speed, flows through the regenerator 3 to absorb heat and increase temperature, and then enters the dual-energy compressor 13 to reduce speed and increase pressure, forming a reflux-pressurized vapor compression heat pump.

[0046] Figure 5 The reflux booster vapor compression heat pump shown is implemented as follows:

[0047] (1) Structurally, it mainly consists of a compressor, expander, regenerator, heater, nozzle, steam distribution chamber, throttle valve, low-temperature heat exchanger, diffuser, second nozzle, and second regenerator; the low-temperature heat exchanger 8 has a circulating working fluid channel that connects to the compressor 1 via the second regenerator 15; the steam distribution chamber 6 has a circulating working fluid channel that connects to the compressor 1 via an intermediate inlet; the expander 2 has a circulating working fluid channel that connects to the regenerator 3 and then to the compressor 1 via an intermediate port; the compressor 1 has a circulating working fluid channel and the second nozzle 10 has a first circulating working fluid channel, which merge and connect to the diffuser 9; the diffuser 9 also has a circulating working fluid channel that connects to the heater. Heater 4 is connected, and then splits into two paths—the first path connects to the second nozzle 10 and the second path connects to the regenerator 3. The second nozzle 10 also has a circulating working fluid channel that splits into two paths—the first circulating working fluid channel connects to the diffuser 9 and the second circulating working fluid channel connects to the expander 2. The regenerator 3 also has a circulating working fluid channel that connects to the steam distribution chamber 6 via the second regenerator 15 and the nozzle 5. The steam distribution chamber 6 also has a circulating working fluid channel that connects to the low-temperature heat exchanger 8 via the throttle valve 7. Heater 4 also has a heated medium channel that connects to the outside, and the low-temperature heat exchanger 8 also has a low-temperature heat medium channel that connects to the outside. The expander 2 is connected to the compressor 1 and transmits power.

[0048] (2) In terms of process, the circulating working fluid discharged from compressor 1 is injected and merged by the circulating working fluid from the second nozzle 10 and then enters the diffuser 9 to reduce speed and increase pressure. It flows through the heater 4 to release heat and reduce temperature, and then is supplied to the second nozzle 10 and the regenerator 3 respectively. After the circulating working fluid flows through the second nozzle 10 to reduce pressure and increase speed, it is divided into two paths - the first path is supplied to the diffuser 9, and the second path flows through the expander 2 to reduce speed and reduce pressure to do work, flows through the regenerator 3 to absorb heat and increase temperature, and enters the compressor 1 through the intermediate air inlet port to increase pressure and temperature or increase pressure and temperature and increase speed. The circulating working fluid flows through the regenerator 3 and the second regenerator 15 to gradually release heat. The refrigerant vapor flows through nozzle 5, where its pressure is reduced and its speed is increased. It then enters steam separator 6 for gas-liquid separation. The refrigerant vapor released from steam separator 6 enters compressor 1 through intermediate inlet for pressure and temperature increase. The condensate discharged from steam separator 6 flows through throttle valve 7 for pressure and temperature reduction, flows through low-temperature heat exchanger 8 for heat absorption and vaporization, flows through second regenerator 15 for heat absorption and temperature increase, and then enters compressor 1 for pressure and temperature increase or pressure and temperature increase and speed increase. Expander 2 and external power supply to compressor 1 provide power. The heated medium obtains high-temperature heat load through heater 4, and the low-temperature heat medium obtains low-temperature heat load through low-temperature heat exchanger 8, forming a reflux pressurized steam compression heat pump.

[0049] Figure 6 The reflux booster vapor compression heat pump shown is implemented as follows:

[0050] (1) Structurally, in Figure 5In the reflux booster vapor compression heat pump shown, a two-phase expander 11 is added and replaces the throttle valve 7. The two-phase expander 11 is connected to the compressor 1 and transmits power.

[0051] (2) In terms of process, with Figure 5 Compared with the reflux boosting vapor compression heat pump shown, the difference is that the condensate discharged from the steam separator 6 flows through the two-phase expander 11 to reduce pressure and do work, and then enters the low-temperature heat exchanger 8 to absorb heat and vaporize; the mechanical energy output by the two-phase expander 11 provides power to the compressor 1, forming a reflux boosting vapor compression heat pump.

[0052] Figure 7 The reflux booster vapor compression heat pump shown is implemented as follows:

[0053] (1) Structurally, in Figure 5 In the reflux boosting steam compression heat pump shown, a third nozzle 12 is added and replaces the throttle valve 7, and a dual-energy compressor 13 is added and replaces the compressor 1.

[0054] (2) In terms of process, with Figure 5 Compared to the reflux-pressurized vapor compression heat pump shown, the difference is that the condensate discharged from the steam distribution chamber 6 flows through the third nozzle 12 to reduce pressure and increase speed, flows through the low-temperature heat exchanger 8 to absorb heat and vaporize, flows through the second regenerator 15 to absorb heat and increase temperature, and then enters the dual-energy compressor 13 to increase pressure and temperature and reduce speed, thus forming a reflux-pressurized vapor compression heat pump.

[0055] Figure 8 The reflux booster vapor compression heat pump shown is implemented as follows:

[0056] (1) Structurally, in Figure 5 In the reflux booster steam compression heat pump shown, a third nozzle 12 is added and replaces the throttle valve 7, a dual-energy compressor 13 is added and replaces the compressor 1, and an expander speed increaser 14 is added and replaces the expander 2.

[0057] (2) In terms of process, with Figure 5 Compared to the reflux-pressurized vapor compression heat pump shown, the difference lies in the following: the condensate discharged from the steam distribution chamber 6 flows through the third nozzle 12 to reduce pressure and increase speed, flows through the low-temperature heat exchanger 8 to absorb heat and vaporize, flows through the second regenerator 15 to absorb heat and increase temperature, and then enters the dual-energy compressor 13 to reduce speed and increase pressure; the second circulating working fluid discharged from the second nozzle 10 flows through the expander speed increaser 14 to reduce pressure and do work and increase speed, flows through the regenerator 3 to absorb heat and increase temperature, and then enters the dual-energy compressor 13 to reduce speed and increase pressure, thus forming a reflux-pressurized vapor compression heat pump.

[0058] Figure 9 The reflux booster vapor compression heat pump shown is implemented as follows:

[0059] (1) Structurally, in Figure 1 In the reflux-pressurized steam compression heat pump shown, the diffuser 9 is connected to the heater 4 via a circulating working fluid channel and then splits into two paths—the first path is connected to the second nozzle 10 and the second path is connected to the regenerator 3. The second nozzle 10 is also connected to the diffuser 9 via a circulating working fluid channel and then splits into three paths—the first path is connected to the second nozzle 10 and then to the diffuser 9, the second path is connected to the regenerator 2, and the third path is connected to the regenerator 3.

[0060] (2) In terms of process, with Figure 1 Compared with the reflux boosting vapor compression heat pump shown, the difference is that the circulating working fluid discharged from the heater 4 is divided into three paths: the first path flows through the second nozzle 10 to reduce pressure and increase speed before being supplied to the diffuser 9; the second path enters the expander 2 to reduce pressure and do work; and the third path enters the regenerator 3 to release heat and condense, forming a reflux boosting vapor compression heat pump.

[0061] Figure 10 The reflux booster vapor compression heat pump shown is implemented as follows:

[0062] (1) Structurally, in Figure 1 In the reflux-pressurized steam compression heat pump shown, a new compressor A is added, and the diffuser tube 9 is adjusted to have a circulating working fluid channel connected to the heater 4, so that the diffuser tube 9 has a circulating working fluid channel connected to the heater 4 after passing through the new compressor A.

[0063] (2) In terms of process, with Figure 1 Compared to the reflux-pressurized vapor compression heat pump shown, the difference is that the circulating working fluid discharged from the diffuser tube 9 flows through the newly added compressor A to increase its pressure and temperature, and then enters the heater 4 to release heat and cool down; the external system and the expander 2 jointly provide power to the compressor 1 and the newly added compressor A, or the external system provides power to the newly added compressor A while the expander 2 provides power to the compressor 1, forming a reflux-pressurized vapor compression heat pump.

[0064] Figure 11 The reflux booster vapor compression heat pump shown is implemented as follows:

[0065] (1) Structurally, in Figure 10 In the reflux-pressurized vapor compression heat pump shown, an ejector chamber B is added, and the compressor 1 has a circulating working fluid channel and the nozzle 10 has a first circulating working fluid channel, which are then connected to the diffuser pipe 9. The system is adjusted so that the compressor 1 has a circulating working fluid channel connected to the ejector chamber B, the nozzle 10 has a first circulating working fluid channel connected to the ejector chamber B, and the ejector chamber B has a circulating working fluid channel connected to the diffuser pipe 9.

[0066] (2) In terms of process, with Figure 10Compared with the reflux-pressurized vapor compression heat pump shown, the difference is that the first circulating working fluid discharged from the nozzle 10 enters the ejector chamber B, the circulating working fluid discharged from the ejector compressor 1 enters the ejector chamber B, and the circulating working fluid discharged from the ejector chamber B enters the diffuser tube 9 to reduce speed, increase pressure and increase temperature, thus forming a reflux-pressurized vapor compression heat pump.

[0067] The effects achievable by this invention—the reflux-pressurization vapor compression heat pump proposed in this invention has the following effects and advantages:

[0068] (1) The pressurization and depressurization processes of the circulating working fluid in the core components are shortened, reducing irreversible process losses.

[0069] (2) It significantly reduces the workload of the compressor and expander, thereby reducing the size of the heat pump unit, lowering the manufacturing cost of the heat pump unit, and improving its economic efficiency.

[0070] (3) Mechanical energy drives the pressurization, and macroscopic kinetic energy drives the pressurization independently. The two work together to undertake the pressurization process of the circulating working fluid. This is conducive to significantly increasing the pressurization ratio of the circulating working fluid, thereby achieving high-efficiency cooling and heating across a wide temperature range.

[0071] (4) It significantly reduces the complexity of the circulating working fluid during the entire pressurization and depressurization process, significantly reduces the mechanical transfer share of energy and systemic irreversible loss, and is conducive to improving the performance index of the heat pump device.

[0072] (5) It can achieve a large pressure ratio process, which is conducive to the simultaneous supply of cold and heat and improves economic efficiency.

[0073] (6) It has enriched the types of vapor compression heat pumps, significantly reduced manufacturing costs, and greatly expanded their application range.

[0074] (7) Significantly reduces the pressure boosting process undertaken by the compressor, effectively resolves the contradiction between the pressure boosting ratio and the circulating working fluid flow rate, and is conducive to the construction of a high-load vapor compression heat pump device.

[0075] (8) It has greatly promoted the advancement of vapor compression heat pump technology, which is conducive to better utilizing mechanical energy to achieve efficient cooling, deep cooling, efficient heating and high-temperature heating, resulting in high comprehensive benefits.

Claims

1. A reflux-pressurized steam compression heat pump mainly consists of a compressor, an expander, a regenerator, a heater, a nozzle, a steam distribution chamber, a throttling valve, a low-temperature heat exchanger, a diffuser, and a second nozzle. The low-temperature heat exchanger (8) has a circulating working fluid channel connected to the compressor (1). The steam distribution chamber (6) has a circulating working fluid channel connected to the compressor (1) through an intermediate inlet. The expander (2) has a circulating working fluid channel connected to the regenerator (3) and then connected to the compressor (1) through an intermediate port. The compressor (1) has a circulating working fluid channel, and the second nozzle (10) has a first circulating working fluid channel. The two converge and connect to the diffuser (9). The diffuser (9) also has a circulating working fluid channel connected to the heater (4), and then the flow is divided into... Two paths—the first path is connected to the second nozzle (10) and the second path is connected to the regenerator (3). The second nozzle (10) also has a circulating working fluid channel divided into two paths—the first circulating working fluid channel is connected to the diffuser (9) and the second circulating working fluid channel is connected to the expander (2). The regenerator (3) also has a circulating working fluid channel connected to the steam distribution chamber (6) via the nozzle (5). The steam distribution chamber (6) also has a circulating working fluid channel connected to the low-temperature heat exchanger (8) via the throttle valve (7). The heater (4) also has a heated medium channel connected to the outside. The low-temperature heat exchanger (8) also has a low-temperature heat medium channel connected to the outside. The expander (2) is connected to the compressor (1) and transmits power, forming a reflux boosting steam compression heat pump.

2. A reflux-pressurized vapor compression heat pump is a reflux-pressurized vapor compression heat pump according to claim 1, wherein a two-phase expander (11) is added and the throttle valve (7) is replaced. The two-phase expander (11) is connected to the compressor (1) and transmits power to form a reflux-pressurized vapor compression heat pump.

3. A recirculation-pressurized vapor compression heat pump is formed by adding a third nozzle (12) to replace the throttle valve (7) and adding a dual-energy compressor (13) to replace the compressor (1) in the recirculation-pressurized vapor compression heat pump described in claim 1, thereby forming a recirculation-pressurized vapor compression heat pump.

4. A recirculation-pressurized vapor compression heat pump is formed by adding a third nozzle (12) to replace the throttle valve (7), adding a dual-energy compressor (13) to replace the compressor (1), and adding an expander speed increaser (14) to replace the expander (2) in the recirculation-pressurized vapor compression heat pump described in claim 1.

5. A reflux-pressurized steam compression heat pump mainly consists of a compressor, expander, regenerator, heater, nozzle, steam distribution chamber, throttling valve, low-temperature heat exchanger, diffuser, second nozzle, and second regenerator. The low-temperature heat exchanger (8) has a circulating working fluid channel that connects to the compressor (1) via the second regenerator (15). The steam distribution chamber (6) has a circulating working fluid channel that connects to the compressor (1) via an intermediate inlet. The expander (2) has a circulating working fluid channel that connects to the regenerator (3) and then to the compressor (1) via an intermediate port. The compressor (1) has a circulating working fluid channel, and the second nozzle (10) has a first circulating working fluid channel. The two channels merge and connect to the diffuser (9). The diffuser (9) also has a circulating working fluid channel that connects to the heater (4). The circuit is then divided into two paths: the first path is connected to the second nozzle (10) and the second path is connected to the regenerator (3). The second nozzle (10) also has a circulating working fluid channel divided into two paths: the first circulating working fluid channel is connected to the diffuser (9) and the second circulating working fluid channel is connected to the expander (2). The regenerator (3) also has a circulating working fluid channel connected to the steam distribution chamber (6) via the second regenerator (15) and the nozzle (5). The steam distribution chamber (6) also has a circulating working fluid channel connected to the low-temperature heat exchanger (8) via the throttle valve (7). The heater (4) also has a heated medium channel connected to the outside. The low-temperature heat exchanger (8) also has a low-temperature heat medium channel connected to the outside. The expander (2) is connected to the compressor (1) and transmits power, forming a reflux-pressurized steam compression heat pump.

6. A reflux-pressurized vapor compression heat pump is a reflux-pressurized vapor compression heat pump according to claim 5, wherein a two-phase expander (11) is added and the throttle valve (7) is replaced. The two-phase expander (11) is connected to the compressor (1) and transmits power to form a reflux-pressurized vapor compression heat pump.

7. A reflux-pressurized vapor compression heat pump is formed by adding a third nozzle (12) to replace the throttle valve (7) and adding a dual-energy compressor (13) to replace the compressor (1) in the reflux-pressurized vapor compression heat pump described in claim 5, thereby forming a reflux-pressurized vapor compression heat pump.

8. A reflux-pressurized vapor compression heat pump is formed by adding a third nozzle (12) to replace the throttle valve (7), adding a dual-energy compressor (13) to replace the compressor (1), and adding an expander speed increaser (14) to replace the expander (2) in the reflux-pressurized vapor compression heat pump described in claim 5.

9. A reflux-pressurized steam compression heat pump is a reflux-pressurized steam compression heat pump according to any one of claims 1-8, wherein the diffuser (9) is connected to the heater (4) via a circulating working fluid channel and then split into two paths—the first path is connected to the second nozzle (10) and the second path is connected to the regenerator (3). The second nozzle (10) is also split into two paths via a circulating working fluid channel—the first circulating working fluid channel is connected to the diffuser (9) and the second circulating working fluid channel is connected to the expander (2). The two paths are then adjusted so that the pressure pipe (9) is connected to the heater (4) via a circulating working fluid channel and then split into three paths—the first path is connected to the second nozzle (10) and then to the diffuser (9), the second path is connected to the expander (2), and the third path is connected to the regenerator (3), thus forming a reflux-pressurized steam compression heat pump.

10. A reflux-pressurized steam compression heat pump is formed by adding a new compressor (A) to any of the reflux-pressurized steam compression heat pumps described in claims 1-9, and adjusting the diffuser (9) so that the diffuser (9) has a circulating working fluid channel connected to the heater (4) and then the circulating working fluid channel is connected to the heater (4) after passing through the new compressor (A), thus forming a reflux-pressurized steam compression heat pump.

11. A reflux-pressurized vapor compression heat pump is a reflux-pressurized vapor compression heat pump according to any one of claims 1-10, wherein an ejector chamber (B) is added, and the compressor (1) has a circulating working fluid channel and the nozzle (10) has a first circulating working fluid channel, which are then connected to the diffuser (9). The compressor (1) has a circulating working fluid channel connected to the ejector chamber (B), the nozzle (10) has a first circulating working fluid channel connected to the ejector chamber (B), and the ejector chamber (B) has a circulating working fluid channel connected to the diffuser (9), thus forming a reflux-pressurized vapor compression heat pump.

12. A reflux-pressurized steam compression heat pump is a reflux-pressurized steam compression heat pump according to any one of claims 1-11, wherein the regenerator (3) is provided with a heated medium channel connected to the outside to form a reflux-pressurized steam compression heat pump.

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