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, an expander has a circulating working medium passage in communication with a back heat exchanger, and then communicates with the compressor through an intermediate port, the compressor has a circulating working medium passage and a nozzle, and the two have a first circulating working medium passage and are in communication with a diffuser, the diffuser has a circulating working medium passage in communication with a heater, and then is divided into two paths, a first path in communication with the nozzle and a second path in communication with the back heat exchanger, the nozzle has a circulating working medium passage, which is divided into two paths, a first circulating working medium passage in communication with the diffuser and a second circulating working medium passage in communication with the expander, the back heat exchanger has a circulating working medium passage in communication with the low-temperature heat exchanger through a throttle valve, the heater has a heated medium passage in communication with the outside, the low-temperature heat exchanger has a low-temperature heat medium passage in communication with the outside, the expander is connected with the compressor and transmits power, and a backflow pressure-boosting vapor compression heat pump is formed.

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] From the perspective of the components constituting a combined cycle vapor compression heat pump, the compressor and expander are indispensable core components; after years of theoretical research and engineering practice, and through in-depth thinking 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 principle of simple and efficient use of mechanical energy for refrigeration / heating, and taking the reduction of repetitive energy conversion processes in the heat pump system as the starting point, a reflux booster vapor compression heat pump with reasonable process, simple system, and high-efficiency 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 recirculation-pressurized vapor compression heat pump mainly consists of a compressor, expander, throttling valve, heater, regenerator, low-temperature heat exchanger, diffuser, and nozzle. The low-temperature heat exchanger has a circulating working fluid channel connected to the compressor. 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 nozzle has a first circulating working fluid channel that merges and connects to the diffuser. The diffuser also has a circulating working fluid channel connected to the heater, then splits into two paths—the first path connects to the nozzle, and the second path connects to the regenerator. The nozzle also has a circulating working fluid channel split into two paths—the first path connects to the diffuser, and the second path connects to the expander. The regenerator also has a circulating working fluid channel connected to the low-temperature heat exchanger via the throttling valve. The heater also has a channel for the heated medium connected to the outside, and the low-temperature heat exchanger also has a channel for the low-temperature heating medium connected to the outside. The expander connects to the compressor and transmits power, forming a recirculation-pressurized vapor compression heat pump.

[0008] 2. A recirculation-pressurized vapor compression heat pump mainly consists of a compressor, expander, throttling valve, heater, regenerator, low-temperature heat exchanger, diffuser, 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 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 nozzle has a first circulating working fluid channel that merges and connects to the diffuser. The diffuser also has a circulating working fluid channel that connects to the heater and then splits into two paths—the first path connects to the nozzle, and the second path connects to the regenerator. The nozzle also has a circulating working fluid channel that splits into two paths—the first path connects to the diffuser, and the second path connects to the expander. The regenerator also has a circulating working fluid channel that connects to the low-temperature heat exchanger via the second regenerator and throttling valve. The heater also has a channel for the heated medium that connects to the outside. The low-temperature heat exchanger also has a channel for the low-temperature heating medium that connects to the outside. The expander connects to the compressor and transmits power, forming a recirculation-pressurized vapor compression heat pump.

[0009] 3. A recirculation-pressurized vapor compression heat pump mainly consists of a compressor, expander, throttling valve, heater, regenerator, low-temperature heat exchanger, diffuser, and nozzle. The low-temperature heat exchanger has a circulating working fluid channel connected to the compressor. 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 nozzle has a circulating working fluid channel that merges and connects to the diffuser. The diffuser also has a circulating working fluid channel connected to the heater, then splits into three paths: the first path connects to the nozzle and then to the diffuser; the second path connects to the expander; and the third path connects to the regenerator. The regenerator also has a circulating working fluid channel connected to the low-temperature heat exchanger via the throttling valve. The heater also has a channel for the heated medium connected to the outside, and the low-temperature heat exchanger also has a channel for the low-temperature heating medium connected to the outside. The expander connects to the compressor and transmits power, forming a recirculation-pressurized vapor compression heat pump.

[0010] 4. A recirculation-pressurized vapor compression heat pump mainly consists of a compressor, expander, throttling valve, heater, regenerator, low-temperature heat exchanger, diffuser, 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 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 nozzle has a circulating working fluid channel that merges and connects to the diffuser. The diffuser also has a circulating working fluid channel that connects to the heater and then splits into three paths: the first path connects to the nozzle and then to the diffuser; the second path connects to the expander; and the third path connects to the regenerator. The regenerator also has a circulating working fluid channel that connects to the low-temperature heat exchanger via the second regenerator and throttling valve. The heater also has a channel for the heated medium that connects to the outside. The low-temperature heat exchanger also has a channel for the low-temperature heating medium that connects to the outside. The expander connects to the compressor and transmits power, forming a recirculation-pressurized vapor compression heat pump.

[0011] 5. A recirculation-pressurized vapor compression heat pump is formed by adding a two-phase expander to any of the recirculation-pressurized vapor compression heat pumps described in items 1-4, replacing the throttle valve, with the two-phase expander connected to the compressor and transmitting power, thus forming a recirculation-pressurized vapor compression heat pump.

[0012] 6. A recirculation-pressurized vapor compression heat pump is formed by adding a second nozzle and replacing the throttle valve, and adding a dual-energy compressor and replacing the compressor in any of the recirculation-pressurized vapor compression heat pumps described in items 1-4.

[0013] 7. A recirculation-pressurized vapor compression heat pump is formed by adding a second nozzle to any of the recirculation-pressurized vapor compression heat pumps described in items 1-4, replacing the throttle valve, adding a dual-energy compressor to replace the compressor, and adding an expander speed increaser to replace the expander.

[0014] 8. 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 1-7, and adjusting the diffuser tube from having a circulating working fluid channel connected to the heater to having a circulating working fluid channel in the diffuser tube connected to the heater via the new compressor, thus forming a recirculating pressurized vapor compression heat pump.

[0015] 9. A recirculating pressurized vapor compression heat pump is any one of the recirculating pressurized vapor compression heat pumps described in items 1-8, 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.

[0016] 10. A recirculating pressurized vapor compression heat pump is formed by adding a channel for the heated medium to the regenerator and connecting it to the outside in any of the recirculating pressurized vapor compression heat pumps described in items 1-9. Attached image description:

[0017] Figure 1 This is a principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0018] 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.

[0019] Figure 3 This is a third principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0020] Figure 4 This is a fourth principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0021] Figure 5 This is a fifth principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0022] 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.

[0023] Figure 7 This is the seventh principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0024] Figure 8 This is the eighth principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0025] Figure 9 This is the ninth principle thermodynamic system diagram of a reflux-pressurized vapor compression heat pump provided by the present invention.

[0026] In the diagram, 1-compressor, 2-expander, 3-throttle valve, 4-heater, 5-regenerator, 6-low temperature heat exchanger, 7-diffuser tube, 8-nozzle, 9-secondary regenerator, 10-two-phase expander, 11-secondary nozzle, 12-dual-energy compressor, 13-expander speed-up unit, A-new compressor, B-ejector chamber.

[0027] Regarding the ejection chamber, it should be noted that:

[0028] Appendix Figure 9 The ejector chamber B is where the high-speed circulating working fluid discharged from the nozzle 8 meets the ejected circulating working fluid; in other words, the ejector chamber B includes both the outlet circulating working fluid passage of the nozzle 8 and the outlet circulating working fluid passage of the compressor 1; therefore, attached... Figure 1-8 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:

[0029] 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.

[0030] Figure 1 The reflux booster vapor compression heat pump shown is implemented as follows:

[0031] (1) Structurally, it is mainly composed of a compressor, an expander, a throttle valve, a heater, a regenerator, a low-temperature heat exchanger, a diffuser tube, and a nozzle. The low-temperature heat exchanger 6 has a circulating working fluid channel connected to the compressor 1. The expander 2 has a circulating working fluid channel connected to the regenerator 5 and then connected to the compressor 1 through an intermediate port. The compressor 1 has a circulating working fluid channel, and the nozzle 8 has a first circulating working fluid channel. The two converge and are connected to the diffuser tube 7. The diffuser tube 7 also has a circulating working fluid channel connected to the heater 4 and then splits into two paths - the first path is connected to the nozzle 8 and the second path is connected to the regenerator 5. The nozzle 8 also has a circulating working fluid channel split into two paths - the first circulating working fluid channel is connected to the diffuser tube 7 and the second circulating working fluid channel is connected to the expander 2. The regenerator 5 also has a circulating working fluid channel connected to the low-temperature heat exchanger 6 through the throttle valve 3. The heater 4 also has a heated medium channel connected to the outside. The low-temperature heat exchanger 6 also has a low-temperature heat medium channel connected to the outside. The expander 2 is connected to the compressor 1 and transmits power.

[0032] (2) In terms of process, the circulating working fluid discharged from the compressor 1 is injected and merged by the circulating working fluid from the nozzle 8 and enters the diffuser 7 to reduce speed and increase pressure. It flows through the heater 4 to release heat and reduce temperature, and then supplies the nozzle 8 and the regenerator 5 respectively. The first path of circulating working fluid discharged from the heater 4 flows through the nozzle 8 to reduce pressure and increase speed, and then splits into two paths - the first path is supplied to the diffuser 7, and the second path flows through the expander 2 to reduce speed and reduce pressure to do work, flows through the regenerator 5 to absorb heat and increase temperature, and enters the compressor 1 through the intermediate air inlet port to increase pressure and increase temperature. The second path of circulating working fluid discharged from the heater 4 flows through the regenerator 5 to release heat and condense, flows through the throttle valve 3 to reduce pressure and decrease temperature, flows through the low temperature heat exchanger 6 to absorb heat and evaporate or further superheat, and then enters the compressor 1 to increase pressure and increase temperature. The expander 2 and the outside provide power to the compressor 1. The heated medium obtains high temperature heat load through the heater 4, and the low temperature heat medium obtains low temperature heat load through the low temperature heat exchanger 6, forming a reflux pressurized vapor compression heat pump.

[0033] Figure 2 The reflux booster vapor compression heat pump shown is implemented as follows:

[0034] (1) Structurally, it mainly consists of a compressor, an expander, a throttle valve, a heater, a regenerator, a low-temperature heat exchanger, a diffuser, a nozzle, and a second regenerator; the low-temperature heat exchanger 6 has a circulating working fluid channel that connects to the compressor 1 via the second regenerator 9; the expander 2 has a circulating working fluid channel that connects to the regenerator 5 and then connects to the compressor 1 via an intermediate port; the compressor 1 has a circulating working fluid channel and the nozzle 8 has a first circulating working fluid channel, which merge and connect to the diffuser 7; the diffuser 7 also has a circulating working fluid channel that connects to the heater. After 4, it splits into two paths—the first path connects to the nozzle 8 and the second path connects to the regenerator 5. The nozzle 8 also has a circulating working fluid channel that splits into two paths—the first circulating working fluid channel connects to the diffuser 7 and the second circulating working fluid channel connects to the expander 2. The regenerator 5 also has a circulating working fluid channel that connects to the low-temperature heat exchanger 6 via the second regenerator 9 and the throttle valve 3. The heater 4 also has a heated medium channel that connects to the outside. The low-temperature heat exchanger 6 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.

[0035] (2) In terms of process, with Figure 1 Compared to the reflux-pressurized vapor compression heat pump shown, the difference is that the second circulating working fluid discharged from the heater 4 flows through the regenerator 5 and the second regenerator 9 to gradually release heat and condense, flows through the throttling valve 3 to reduce pressure and temperature, flows through the low-temperature heat exchanger 6 to absorb heat and vaporize, flows through the second regenerator 9 to absorb heat and increase temperature, and then enters the compressor 1 to increase pressure and temperature, thus forming a reflux-pressurized vapor compression heat pump.

[0036] Figure 3 The reflux booster vapor compression heat pump shown is implemented as follows:

[0037] (1) Structurally, it is mainly composed of a compressor, an expander, a throttle valve, a heater, a regenerator, a low-temperature heat exchanger, a diffuser tube, and a nozzle. The low-temperature heat exchanger 6 has a circulating working fluid channel connected to the compressor 1. The expander 2 has a circulating working fluid channel connected to the regenerator 5 and then connected to the compressor 1 through an intermediate port. The compressor 1 has a circulating working fluid channel, and the nozzle 8 has a circulating working fluid channel. The two converge and are connected to the diffuser tube 7. The diffuser tube 7 also has a circulating working fluid channel connected to the heater 4 and then splits into three paths: the first path is connected to the nozzle 8 and then to the diffuser tube 7, the second path is connected to the expander 2, and the third path is connected to the regenerator 5. The regenerator 5 also has a circulating working fluid channel connected to the low-temperature heat exchanger 6 through the throttle valve 3. The heater 4 also has a heated medium channel connected to the outside. The low-temperature heat exchanger 6 also has a low-temperature heat medium channel connected to the outside. The expander 2 is connected to the compressor 1 and transmits power.

[0038] (2) In terms of process, the circulating working fluid discharged from compressor 1 is injected and merged by the circulating working fluid from nozzle 8 and then enters diffuser 7 for deceleration and pressure increase. It flows through heater 4 to release heat and cool down, and then splits into three paths—the first path is supplied to nozzle 8, the second path is supplied to expander 2, and the third path is supplied to regenerator 5; the first path of circulating working fluid discharged from heater 4 flows through nozzle 8 for depressurization and acceleration, and then is supplied to diffuser 7; the second path of circulating working fluid discharged from heater 4 flows through expander 2 for deceleration and depressurization, and then flows through regenerator 5. Heat absorber 5 absorbs heat and heats up, then enters compressor 1 through the intermediate air inlet port for pressurization and heating; the third stream discharged from heater 4 flows through regenerator 5 to release heat and condense, then flows through throttle valve 3 to reduce pressure and temperature, then flows through low-temperature heat exchanger 6 to absorb heat and evaporate or further superheat, and then enters compressor 1 for pressurization and heating; expander 2 and external power supply compressor 1, 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 6, forming a reflux pressurization vapor compression heat pump.

[0039] Figure 4 The reflux booster vapor compression heat pump shown is implemented as follows:

[0040] (1) Structurally, it is mainly composed of a compressor, an expander, a throttle valve, a heater, a regenerator, a low-temperature heat exchanger, a diffuser, a nozzle, and a second regenerator. The low-temperature heat exchanger 6 has a circulating working fluid channel that connects to the compressor 1 via the second regenerator 9. The expander 2 has a circulating working fluid channel that connects to the regenerator 5 and then connects to the compressor 1 via an intermediate port. The compressor 1 has a circulating working fluid channel, and the nozzle 8 has a circulating working fluid channel that merges and connects to the diffuser 7. The diffuser 7 also has a circulating working fluid channel that connects to the heater 4 and then splits into three paths: the first path connects to the nozzle 8 and then to the diffuser 7; the second path connects to the expander 2; and the third path connects to the regenerator 5. The regenerator 5 also has a circulating working fluid channel that connects to the low-temperature heat exchanger 6 via the second regenerator 9 and the throttle valve 3. The heater 4 also has a heated medium channel that connects to the outside. The low-temperature heat exchanger 6 also has a low-temperature heat medium channel that connects to the outside. The expander 2 connects to the compressor 1 and transmits power.

[0041] (2) In terms of process, with Figure 3 Compared to the reflux-pressurized vapor compression heat pump shown, the difference is that the third circulating working fluid discharged from the heater 4 flows through the regenerator 5 and the second regenerator 9 to gradually release heat and condense, flows through the throttling valve 3 to reduce pressure and temperature, flows through the low-temperature heat exchanger 6 to absorb heat and vaporize, flows through the second regenerator 9 to absorb heat and increase temperature, and then enters the compressor 1 to increase pressure and temperature, forming a reflux-pressurized vapor compression heat pump.

[0042] Figure 5 The reflux booster vapor compression heat pump shown is implemented as follows:

[0043] (1) Structurally, in Figure 1In the reflux booster vapor compression heat pump shown, a two-phase expander 10 is added and replaces the throttle valve 3. The two-phase expander 10 is connected to the compressor 1 and transmits power.

[0044] (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 second circulating working fluid discharged from the heater 4 flows through the regenerator 5 to release heat and condense, flows through the two-phase expander 10 to reduce pressure and do work, flows through the low-temperature heat exchanger 6 to absorb heat and vaporize, and then enters the compressor 1 to increase pressure and temperature; the mechanical energy output by the two-phase expander 10 provides power to the compressor 1, forming a reflux-pressurized vapor compression heat pump.

[0045] Figure 6 The reflux booster vapor compression heat pump shown is implemented as follows:

[0046] (1) Structurally, in Figure 2 In the reflux boosting vapor compression heat pump shown, a second nozzle 11 is added and replaces the throttle valve 3, and a dual-energy compressor 12 is added and replaces the compressor 1.

[0047] (2) In terms of process, with Figure 2 Compared to the reflux-pressurized vapor compression heat pump shown, the difference is that the second circulating working fluid discharged from the heater 4 flows through the regenerator 5 and the second regenerator 9 to gradually release heat and condense, flows through the second nozzle 11 to decrease pressure and increase speed, flows through the low-temperature heat exchanger 6 to absorb heat and vaporize, flows through the second regenerator 9 to absorb heat and increase temperature, and then enters the dual-energy compressor 12 to decrease speed and increase pressure, forming a reflux-pressurized vapor compression heat pump.

[0048] Figure 7 The reflux booster vapor compression heat pump shown is implemented as follows:

[0049] (1) Structurally, in Figure 2 In the reflux booster steam compression heat pump shown, a second nozzle 11 is added and replaces the throttle valve 3, a dual-energy compressor 12 is added and replaces the compressor 1, and an expander speed increaser 13 is added and replaces the expander 2.

[0050] (2) In terms of process, with Figure 2 Compared to the reflux-pressurization vapor compression heat pump shown, the difference lies in the following: the second circulating working fluid discharged from the nozzle 8 flows through the expander speed increaser 13 to reduce speed and pressure, flows through the regenerator 5 to absorb heat and increase temperature, and then enters the dual-energy compressor 12 to reduce speed and increase pressure; the second circulating working fluid discharged from the heater 4 flows through the regenerator 5 and the second regenerator 9 to gradually release heat and condense, flows through the second nozzle 11 to reduce pressure and increase speed, flows through the low-temperature heat exchanger 6 to absorb heat and vaporize, flows through the second regenerator 9 to absorb heat and increase temperature, and then enters the dual-energy compressor 12 to reduce speed and increase pressure, thus forming a reflux-pressurization vapor compression heat pump.

[0051] Figure 8 The reflux booster vapor compression heat pump shown is implemented as follows:

[0052] (1) Structurally, in Figure 1 In the reflux-pressurized steam compression heat pump shown, a new compressor A is added, and the diffuser 7 is connected to the heater 4 via a circulating working fluid channel. The diffuser 7 is then adjusted so that it is connected to the heater 4 via the new compressor A.

[0053] (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 7 flows through the new 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 new compressor A, or the external system provides power to the new compressor A while the expander 2 provides power to the compressor 1, forming a reflux-pressurized vapor compression heat pump.

[0054] Figure 9 The reflux booster vapor compression heat pump shown is implemented as follows:

[0055] (1) Structurally, in Figure 8 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 8 has a first circulating working fluid channel, which are then connected to the diffuser pipe 7. The system is adjusted so that the compressor 1 has a circulating working fluid channel connected to the ejector chamber B, the nozzle 8 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 7.

[0056] (2) In terms of process, with Figure 8 Compared to the reflux-pressurized vapor compression heat pump shown, the difference is that the first circulating working fluid discharged from the nozzle 8 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 7 to reduce speed, increase pressure and increase temperature, thus forming a reflux-pressurized vapor compression heat pump.

[0057] The effects achievable by this invention—the reflux-pressurized vapor compression heat pump proposed in this invention has the following effects and advantages:

[0058] (1) The pressure increase and decrease process of the circulating working fluid in the core components is shortened or reduced, thus reducing irreversible process losses.

[0059] (2) It significantly reduces the workload of the compressor and expander, thereby reducing the size of the heat pump unit, lowering manufacturing costs, and improving economic efficiency.

[0060] (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.

[0061] (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.

[0062] (5) It can achieve a large pressure ratio process, which is conducive to the simultaneous supply of cold and heat and improves economic efficiency.

[0063] (6) It has enriched the types of vapor compression heat pumps, significantly reduced manufacturing costs, and greatly expanded their application range.

[0064] (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.

[0065] (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 throttling valve, a heater, a regenerator, a low-temperature heat exchanger, a diffuser, and a nozzle. The low-temperature heat exchanger (6) has a circulating working fluid channel connected to the compressor (1). The expander (2) has a circulating working fluid channel connected to the regenerator (5) and then connected to the compressor (1) through an intermediate port. The compressor (1) has a circulating working fluid channel, and the nozzle (8) has a first circulating working fluid channel. The two converge and connect to the diffuser (7). The diffuser (7) also has a circulating working fluid channel connected to the heater (4) and then splits into two paths— The first path is connected to the nozzle (8) and the second path is connected to the regenerator (5). The nozzle (8) also has a circulating working medium channel divided into two paths - the first circulating working medium channel is connected to the diffuser (7) and the second circulating working medium channel is connected to the expander (2). The regenerator (5) also has a circulating working medium channel connected to the low-temperature heat exchanger (6) via the throttle valve (3). The heater (4) also has a heated medium channel connected to the outside. The low-temperature heat exchanger (6) also has a low-temperature heat medium channel connected to the outside. The expander (2) is connected to the compressor (1) and transmits power to form a reflux-pressurized steam compression heat pump.

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

3. A reflux-pressurized steam compression heat pump mainly consists of a compressor, an expander, a throttling valve, a heater, a regenerator, a low-temperature heat exchanger, a diffuser, and a nozzle. The low-temperature heat exchanger (6) has a circulating working fluid channel connected to the compressor (1). The expander (2) has a circulating working fluid channel connected to the regenerator (5) and then connected to the compressor (1) through an intermediate port. The compressor (1) has a circulating working fluid channel, and the nozzle (8) has a circulating working fluid channel. The two converge and connect to the diffuser (7). The diffuser (7) also has a circulating working fluid channel connected to... After the heating unit (4), it is divided into three paths: the first path is connected to the nozzle (8) and then to the diffuser (7); the second path is connected to the expander (2); and the third path is connected to the regenerator (5). The regenerator (5) also has a circulating working medium channel connected to the low-temperature heat exchanger (6) via the throttle valve (3); the heating unit (4) also has a heated medium channel connected to the outside; the low-temperature heat exchanger (6) 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.

4. The reflux-pressurized steam compression heat pump mainly consists of a compressor, expander, throttle valve, heater, regenerator, low-temperature heat exchanger, diffuser, nozzle, and second regenerator; the low-temperature heat exchanger (6) has a circulating working fluid channel that connects to the compressor (1) via the second regenerator (9), the expander (2) has a circulating working fluid channel that connects to the regenerator (5) and then connects to the compressor (1) through an intermediate port, the compressor (1) has a circulating working fluid channel and the nozzle (8) has a circulating working fluid channel that merges and connects to the diffuser (7), the diffuser (7) also has a circulating working fluid After the channel connects to the heater (4), it is divided into three paths: the first path connects to the nozzle (8) and then to the diffuser (7); the second path connects to the expander (2); and the third path connects to the regenerator (5). The regenerator (5) also has a circulating working medium channel that connects to the low-temperature heat exchanger (6) via the second regenerator (9) and the throttle valve (3). The heater (4) also has a heated medium channel that connects to the outside. The low-temperature heat exchanger (6) 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, forming a reflux-pressurized steam compression heat pump.

5. A reflux-pressurized vapor compression heat pump is formed by adding a two-phase expander (10) and replacing the throttle valve (3) in any of the reflux-pressurized vapor compression heat pumps described in claims 1-4. The two-phase expander (10) is connected to the compressor (1) and transmits power to form a reflux-pressurized vapor compression heat pump.

6. A recirculation-pressurized vapor compression heat pump is formed by adding a second nozzle (11) and replacing the throttle valve (3) to any of the recirculation-pressurized vapor compression heat pumps described in claims 1-4, and adding a dual-energy compressor (12) and replacing the compressor (1).

7. A recirculating pressurized vapor compression heat pump is formed by adding a second nozzle (11) to replace the throttle valve (3), adding a dual-energy compressor (12) to replace the compressor (1), and adding an expander speed increaser (13) to replace the expander (2) in any of the recirculating pressurized vapor compression heat pumps described in claims 1-4.

8. 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 1-7, and adjusting the diffuser (7) with a circulating working fluid channel connected to the heater (4) to a diffuser (7) with a circulating working fluid channel connected to the heater (4) via the new compressor (A), thus forming a reflux-pressurized steam compression heat pump.

9. A reflux-pressurized vapor compression heat pump is a reflux-pressurized vapor compression heat pump according to any one of claims 1-8, wherein an ejector chamber (B) is added, and the compressor (1) has a circulating working fluid channel and the nozzle (8) has a first circulating working fluid channel, which are then connected to the diffuser (7). The compressor (1) has a circulating working fluid channel connected to the ejector chamber (B), the nozzle (8) 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 (7), thus forming a reflux-pressurized vapor compression heat pump.

10. A reflux-pressurized steam compression heat pump is a reflux-pressurized steam compression heat pump according to any one of claims 1-9, wherein the regenerator (5) is provided with a heated medium channel connected to the outside to form a reflux-pressurized steam compression heat pump.

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