Multi-connected unit composed of an ejector enthalpy-increasing evaporative cooling air-cooled heat pump unit

Abstract

The application discloses a multi-connected unit composed of an ejector enthalpy-increasing evaporative cooling air-cooled heat pump unit, comprising a refrigerant pump push module, a rectifier module, a cold and heat source heat exchanger module, an ejector enthalpy-increasing module, an economizer module and a use side module. The application integrates an evaporative cooling host and a cooling tower into one, adds an air source heat exchanger in the evaporative cooling unit based on the air-cooled heat pump module unit, and creates a new type of air-cooled evaporative cooling integrated heat pump module unit which integrates the air-cooled heat pump unit and the evaporative cooling unit. The unit not only realizes the small modularization of the traditional water chiller unit, but also expands the air-cooled heat pump heating function of the evaporative cooling unit. The unit adopts the jet enthalpy-increasing and ejector composite technology to greatly improve the mechanical efficiency of the heat pump, and can realize the small modularization of the large unit, the integration of refrigeration and cooling, the integration of air-cooled and evaporative cooling, the diversification of cold and heat sources, the high efficiency of refrigeration and heating, and the convenience of installation and operation.

Description

[0001] This application is a divisional application of the invention patent application number: 202110638911.7, invention title: An ejector-induced enthalpy-increasing evaporative cooling air-cooled heat pump unit. Technical Field

[0002] This invention relates to the field of heat exchangers, and in particular to a multi-unit system composed of an ejector-induced enthalpy-increasing evaporative cooling air-cooled heat pump unit. Background Technology

[0003] Existing evaporative heat pump units use water as the cooling medium for refrigeration. By utilizing the latent heat and sensible heat of water for heat exchange, the refrigerant can achieve a lower condensing temperature than water-cooled, especially air-cooled, units, thus achieving higher refrigeration efficiency. When heating, air is used as the heat source, avoiding the problems of low heating efficiency or complete inability to heat in water-cooled units, including evaporative heat pump units.

[0004] However, existing evaporative heat pump units share the same cold source heat exchanger (evaporative cold heat exchanger) and heat source heat exchanger (air-cooled heat exchanger), resulting in large unit size, numerous internal components, and complex piping design, leading to high equipment manufacturing costs and hindering the promotion and popularization of these units.

[0005] Specifically, existing evaporative heat pump units have the following shortcomings:

[0006] Large size: Due to the excessively long travel distance of the cooling water as it flows sequentially from the sprayer (water distributor) through the evaporative-condensing heat exchanger and drips from the packing layer into the cooling water tank during the heat exchange process between the cooling water and the refrigerant, the longitudinal height of the evaporative heat pump unit is increased, resulting in a larger unit size and correspondingly higher manufacturing costs. To ensure uniform water distribution on the surface of the evaporative heat exchanger, sufficient gaps must be maintained between the sprayer and the evaporator. To ensure sufficient cooling of the cooling water after heat exchange with the refrigerant, the cooling water dripping from the evaporative heat exchanger must maintain a considerable distance from the water surface in the cooling water tank. Therefore, the fan will carry away a large amount of cooling water during unit operation, resulting in splashing and drifting water phenomena. This not only wastes cooling water but also causes corrosion of the unit components due to the cooling water adhering to them, reducing the unit's service life.

[0007] Severe reduction in heating capacity: Evaporative cooling, as the most efficient cooling method, enables the unit to have higher cooling efficiency. However, in the air-cooled heat pump mode, the heating capacity decreases as the outdoor ambient temperature decreases. Therefore, the heating efficiency under low-temperature conditions needs to be improved.

[0008] Due to the technical limitations of evaporative heat pump units, this application proposes an ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump unit. Summary of the Invention

[0009] This application aims to solve the problems of high energy consumption, large size, high manufacturing cost, severe heat loss, and water splashing and drifting in the evaporative cooling environment of existing evaporative heat pump units.

[0010] This application utilizes a combined ejector and jet enthalpy enhancement technology to achieve dual recovery of kinetic and thermal energy during the heat pump thermodynamic cycle, enabling more thorough heat exchange of the refrigerant under isentropic and isenthalpic conditions, thus making the unit more energy-efficient. It employs a fully covered connecting pipeline design for both air-cooled and evaporative heat exchangers, allowing for different series and parallel combinations under various operating conditions. This enables the two heat exchangers to be used not only independently but also to complement each other, thereby reducing manufacturing costs and making the evaporative heat pump unit economical and easy to promote.

[0011] The technical solution adopted by this invention to solve its technical problem is as follows:

[0012] An ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump unit includes a refrigerant pump push module, a rectifier module, a heat exchanger module, an ejector-induced enthalpy-enhancing module, an economizer module, and a user-side module.

[0013] The refrigerant pump push module includes a compressor, which is equipped with a steam injection port, a return port, and an enthalpy-increasing suction port;

[0014] The steam injection port forms nodes A1 and A2 connected to the cold and heat source heat exchanger module and node B connected to the user side module through a multi-way valve and pipeline; node C connected to the ejector enthalpy enhancement module is formed between node A1 (or A2) and node B through a multi-way valve and pipeline.

[0015] The return gas port is connected to node D of the ejector enthalpy enhancement module via a pipeline;

[0016] The enthalpy-increasing intake port is connected to node E of the economizer module via a pipeline;

[0017] Optionally, the multi-way valve is a first four-way valve and a second four-way valve. The steam injection port, node A1, and node C are respectively connected to the three valve ports of the first four-way valve through pipelines. Node A2, node B, and node C are respectively connected to the three valve ports of the second four-way valve through pipelines. The remaining valve ports of the first four-way valve and the second four-way valve are connected to each other through a first connecting pipe.

[0018] Optionally, the multi-way valve is a first three-way valve, a second three-way valve, and a third three-way valve. The steam injection port and the parallel nodes A1 and A2 are respectively connected to the two valve ports of the first three-way valve through pipelines. The node B and the parallel nodes A1 and A2 are respectively connected to the two valve ports of the third three-way valve through pipelines. The remaining valve ports of the first three-way valve and the third three-way valve are connected through a second connecting pipe. The nodes B, C, and the parallel nodes A1 and A2 are respectively connected to the three valve ports of the second three-way valve through pipelines.

[0019] Optionally, the multi-way valve is a first two-way valve, a second two-way valve, a third two-way valve, a fourth two-way valve, a ninth two-way valve, and a tenth two-way valve. The steam injection port is connected to the first two-way valve and the second two-way valve via a pipeline. Nodes A1 and A2 are connected in parallel and then connected to the first two-way valve, the third two-way valve, and the tenth two-way valve, respectively. The first two-way valve, the second two-way valve, and the ninth two-way valve are connected in series to node B. The third two-way valve and the fourth two-way valve are connected in series to node B. The tenth two-way valve is connected to the second two-way valve and the ninth two-way valve via a pipeline. Node C is connected to the third two-way valve and the fourth two-way valve via a pipeline.

[0020] The rectifier module includes a node F connected to the heat exchanger module via a multi-way valve and piping, a node G connected to the user-side module, a node H connected to the economizer module, and a node I connected to the ejector enthalpy enhancement module.

[0021] Optionally, the multi-way valve is a third four-way valve, and nodes F, G, H and I are respectively connected to its four valve ports through pipelines;

[0022] Optionally, the multi-way valve is a fourth three-way valve and a fifth three-way valve arranged in parallel. Nodes F, H, and I are respectively connected to the three valve ports of the fourth three-way valve through pipelines, and nodes G, H, and I are respectively connected to the three valve ports of the fifth three-way valve through pipelines.

[0023] Optionally, the multi-way valve is a fifth two-way valve and a sixth two-way valve connected in series, and a seventh two-way valve and an eighth two-way valve connected in parallel and connected in series. Node F is connected between the fifth two-way valve and the sixth two-way valve, node G is connected between the seventh two-way valve and the eighth two-way valve, node H is connected between the sixth two-way valve and the eighth two-way valve, and node I is connected between the fifth two-way valve and the seventh two-way valve.

[0024] Optionally, the multi-way valve is a first check valve, a second check valve connected in series, and a third check valve and a fourth check valve connected in parallel and in series with them.

[0025] The heat exchanger module includes an evaporative heat exchanger and an air source heat exchanger, as well as nodes A1' and A2' connected to the refrigerant pump push module and node F' connected to the rectifier module, respectively, through multi-way valves and pipelines.

[0026] Optionally, the multi-way valve is a sixth three-way valve. The evaporative heat exchanger, the air source heat exchanger, and node F' are respectively connected to the three valve ports of the sixth three-way valve through pipelines. The evaporative heat exchanger is connected to the refrigerant pump push module through node A1', and the air source heat exchanger is connected to the refrigerant pump push module through node A2'.

[0027] Optionally, the multi-way valve is an eleventh two-way valve and a twelfth two-way valve. The eleventh two-way valve is connected between the air source heat exchanger and node F', and the twelfth two-way valve is connected between the evaporative cooling heat exchanger and node F'. The evaporative cooling heat exchanger is connected to the refrigerant pump push module through node A1', and the air source heat exchanger is connected to the refrigerant pump push module through node A2'.

[0028] Preferably, the evaporative heat exchanger is connected to a separate cooling system.

[0029] The separate cooling system includes a cooling water tank, a cooling circulation pump I, a spray water distributor, a cooling circulation pump II, and a cooling tower; the cooling circulation pump I is connected to a cooling water outlet, the spray water distributor is connected to a cooling water inlet, and the cooling circulation pump II and the cooling tower are connected in parallel to the cooling water inlet and the cooling water outlet.

[0030] Optionally, the evaporative heat exchanger is connected to a built-in cooling system.

[0031] The built-in cooling system includes a cooling water tank, a cooling circulation pump I, and a spray water distributor connected to the cooling circulation pump I via pipelines.

[0032] Preferably, the spray water distributor and the evaporative heat exchanger are arranged adjacent to each other with a sufficiently small distance, and the evaporative heat exchanger and the cooling water tank are arranged adjacent to each other with a sufficiently small distance, so as to minimize the occurrence of water splashing and drifting during the spraying process.

[0033] Optionally, both the evaporative heat exchanger and the air source heat exchanger are equipped with induced draft fans at their top.

[0034] Optionally, a waste (hot) water source heat exchanger and a waste (hot) water source control valve, a solar collector heat exchanger and a solar control valve, and a ground (water) source heat exchanger and a ground (water) source control valve are also connected in parallel at the cooling water inlet and cooling water outlet.

[0035] The ejector enthalpy enhancement module includes an ejector, a gas-liquid separator, and nodes I' connected to the rectifier module and J' connected to the economizer module respectively, formed by a multi-way valve and pipelines.

[0036] The ejector is provided with an air inlet, an air intake, and an ejection port;

[0037] The gas-liquid separator is provided with a first refrigerant inlet, a first refrigerant outlet, a second refrigerant inlet, and a second refrigerant outlet;

[0038] The air intake has a node C' connected to the refrigerant pump push module, the first refrigerant outlet has a node D' connected to the refrigerant pump push module, the injection port is connected to the first refrigerant inlet, and the second refrigerant outlet has a node J' connected to the economizer module.

[0039] Optionally, the multi-way valve is a seventh three-way valve, and the air inlet, node I', and the second refrigerant inlet are respectively connected to the three valve ports of the seventh three-way valve through pipelines;

[0040] Optionally, the multi-way valve is a thirteenth two-way valve and a fourteenth two-way valve, the thirteenth two-way valve being connected between the air inlet and node I', and the fourteenth two-way valve being connected between the second refrigerant inlet and node I'.

[0041] Economizer module, including economizer, enthalpy-increasing solenoid valve, and enthalpy-increasing expansion valve;

[0042] The economizer has a node E' connected to the refrigerant pump push module, a node J connected to the ejector enthalpy enhancement module, and a node H' connected to the rectifier module.

[0043] Optionally, the economizer is a plate heat exchanger;

[0044] Optionally, the economizer is a flash evaporator.

[0045] Use side modules, including indoor side heat exchangers;

[0046] The indoor heat exchanger has a chilled water inlet and a chilled water outlet;

[0047] The indoor heat exchanger also has a node B' connected to the refrigerant pump push module and a node G' connected to the rectifier module.

[0048] The nodes A1 and A1', A2 and A2', B and B', C and C', D and D', E and E', F and F', G and G', H and H', I and I', and J and J' are connected accordingly.

[0049] For ease of description, the above-mentioned nodes do not imply that each embodiment of this application must have connection nodes that are exactly the same in position, quantity, etc.

[0050] The aforementioned multi-way valve assembly does not refer to a specific model of valve body or valve body group, but also includes various valve bodies and combinations thereof composed of different numbers / models of valve bodies to achieve specific pipeline structures and functions. For example, in a refrigerant pump push module, a multi-way valve assembly can be a pipeline full-coverage design formed by matrix combination of two-way valves, three-way valves, and four-way valves.

[0051] The present invention also provides a multi-unit system composed of an ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump unit, which includes the refrigerant pump push module, rectifier module, cold and heat source heat exchanger module, ejector-induced enthalpy-enhancing module, economizer module, and user-side module as described in any of the above.

[0052] The user-side module includes multiple sets of indoor heat exchangers arranged in parallel.

[0053] The beneficial effects of this invention are as follows:

[0054] This application employs a combined ejection and enthalpy-enhancing technology to achieve dual recovery of kinetic and thermal energy during the refrigerant thermodynamic cycle, enabling more thorough heat exchange of the refrigerant under isentropic and isenthalpic conditions. This achieves the goals of improving the heat pump cycle environment, reducing the compression ratio, increasing the return gas volume, reducing the exhaust temperature, extending the compressor's service life, improving the unit's heating COP, and making the unit more energy-efficient.

[0055] This application adopts a single- and double-direction full-coverage bridge-type connection pipeline design for air-cooled heat exchangers and evaporative heat exchangers. Under different operating conditions, different series and parallel connection methods can be used in combination, allowing the two heat exchangers to not only be used independently but also to complement each other. By changing the heat exchange medium and adjusting the heat exchange area in a timely manner, higher refrigerant evaporation and condensation rates can be obtained, thereby improving the cooling and heating capacity and the overall efficiency of the unit. While ensuring heat exchange efficiency, it can avoid idle heat exchangers and excessive total heat exchange area and redundancy, thereby reducing manufacturing costs, improving the economy of evaporative heat pump units, and facilitating their promotion.

[0056] This application adopts an externally drawn and separated cooling system, which can separate the cooling water built-in cooling process commonly used in current evaporative heat pump units to the cooling tower. This can achieve the following: (1) the cooling water cooling process in the unit is removed, which can reduce the height of the unit by more than 1 / 3, reduce the volume of the unit and reduce the manufacturing cost of the unit; (2) the evaporative heat exchanger is infinitely close to the cooling water tank at its bottom, which minimizes the occurrence of water splashing and drifting during the cooling water dripping process, avoids the waste of cooling water and the corrosion / aging of the unit; (3) the cooling water is fully cooled in the externally drawn cooling tower, which has a better cooling effect than the unit and can improve the refrigeration efficiency.

[0057] This application, through its connecting pipes forming a series, parallel, and series-parallel full-coverage connection structure, can not only realize the diversified and optimized utilization of various existing cold and heat sources in cooling and heating modes, but also realize the heat pump's conventional, ejection, and enthalpy-increasing cooling and heating methods, thereby making the heat pump highly efficient.

[0058] This invention enables the miniaturization of large units, integration of refrigeration and cooling, integration of air-cooled and evaporative cooling, diversification of cold and heat sources, high efficiency in refrigeration and heating, and convenient installation and maintenance. Attached Figure Description

[0059] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0060] Figure 1 This is a schematic diagram of the piping structure of the ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump module unit (external cooling);

[0061] Figure 2 This is a schematic diagram of the piping structure of the ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump module unit (with built-in cooling);

[0062] Figures 3-5 A schematic diagram of the piping design for the refrigerant pump push module;

[0063] Figures 6-9 A schematic diagram of the piping design for the rectifier module;

[0064] Figures 10-11 A schematic diagram of the piping design for the heat exchanger module;

[0065] Figures 12-13 A schematic diagram of the piping design for the ejector enthalpy enhancement module;

[0066] Figures 14-15 A schematic diagram of the piping design for the economizer module;

[0067] Figures 16-17 A schematic diagram of the piping design for using the side module;

[0068] Figures 18-24 The following are schematic diagrams of the pipeline structure corresponding to the working modes of Examples 1 to 7, respectively. Detailed Implementation

[0069] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0070] Reference Figures 1-2An ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump unit includes a refrigerant pump push module, a rectifier module, a cold and heat source heat exchanger module, an ejector-induced enthalpy-enhancing module, an economizer module, and a user-side module.

[0071] The refrigerant pump push module includes a compressor 11, which is equipped with a steam injection port, a return port and an enthalpy-increasing suction port;

[0072] The steam injection port forms nodes A1 and A2, which are connected to the heat exchanger module of the cold and heat source, and node B, which is connected to the module on the user side, through a multi-way valve and pipeline; node C, which is connected to the ejector enthalpy enhancement module, is formed between node A1 (or A2) and node B through a multi-way valve and pipeline.

[0073] The return gas port is connected to node D of the ejector enthalpy enhancement module via a pipeline;

[0074] The enthalpy-increasing intake port is connected to node E of the economizer module via a pipeline;

[0075] Figure 3 This paper illustrates one embodiment of a multi-way valve group in a refrigerant pump push module, which consists of a first four-way valve Q1 and a second four-way valve Q2. The steam injection port, node A1, and node C are respectively connected to the three valve ports of the first four-way valve Q1 through pipelines. Nodes A2, B, and C are respectively connected to the three valve ports of the second four-way valve Q2 through pipelines. The remaining valve ports of the first four-way valve Q1 and the second four-way valve Q2 are connected to each other through a first connecting pipe.

[0076] Figure 4-5 Other embodiments of the multi-way valve group in the refrigerant pump push module are shown, which can be a first three-way valve T1, a second three-way valve T2 and a third three-way valve T3, or a first two-way valve L1, a second two-way valve L2, a third two-way valve L3, a fourth two-way valve L4, a ninth two-way valve L9 and a tenth two-way valve L10.

[0077] The rectifier module includes a node F connected to the heat exchanger module via a multi-way valve and piping, a node G connected to the user-side module, a node H connected to the economizer module, and a node I connected to the ejector enthalpy enhancement module.

[0078] Figure 6 An embodiment of a multi-port valve group in a rectifier module is shown, which is a third four-port valve Q3, with nodes F, G, H and I connected to its four valve ports through pipelines;

[0079] Figure 7-9Other embodiments of the multi-way valve group in the rectifier module are shown. It can be a fourth three-way valve T4 and a fifth three-way valve T5 arranged in parallel, or a fifth two-way valve L5 and a sixth two-way valve L6 connected in series and a seventh two-way valve L7 and an eighth two-way valve L8 connected in parallel with them, or a first one-way valve S1 and a second one-way valve S2 connected in series and a third one-way valve S3 and a fourth one-way valve S4 connected in parallel with them.

[0080] The heat exchanger module includes an evaporative heat exchanger 21 and an air source heat exchanger 22, as well as nodes A1' and A2' connected to the refrigerant pump push module and node F' connected to the rectifier module respectively through multi-way valves and pipelines;

[0081] Figure 10 An embodiment of a multi-way valve group in a cold and heat source heat exchanger module is shown, which is a sixth three-way valve T6. The cold heat exchanger, air source heat exchanger 22, and node F' are respectively connected to the three valve ports of the sixth three-way valve T6 through pipelines. The evaporative cold heat exchanger 21 is connected to the refrigerant pump push module through node A1', and the air source heat exchanger 22 is connected to the refrigerant pump push module through node A2'.

[0082] Figure 11 Other embodiments of the multi-way valve group in the heat exchanger module are shown, which can be an eleventh two-way valve L11 and a twelfth two-way valve L12. The eleventh two-way valve L11 is connected between the air source heat exchanger 22 and node F', and the twelfth two-way valve L12 is connected between the evaporative cold heat exchanger 21 and node F'. The evaporative cold heat exchanger 21 is connected to the refrigerant pump push module through node A1', and the air source heat exchanger 22 is connected to the refrigerant pump push module through node A2'.

[0083] exist Figure 1 In the middle, the evaporative heat exchanger 21 is connected to a separate cooling system.

[0084] The separate cooling system includes a cooling water tank, a cooling circulation pump I (cooling water pump), a spray water distributor, a cooling circulation pump II (spray pump), and a cooling tower; the cooling circulation pump I is connected to a cooling water outlet, the spray water distributor is connected to a cooling water inlet, and the cooling circulation pump II and the cooling tower are connected in parallel to the cooling water inlet and cooling water outlet.

[0085] The spray water distributor and the evaporative heat exchanger 21 are arranged close to each other with a sufficiently small distance between them, and the evaporative heat exchanger 21 is arranged close to the cooling water tank with a sufficiently small distance between them, so as to minimize the occurrence of water splashing and drifting during the spraying process.

[0086] Both the evaporative heat exchanger 21 and the air source heat exchanger 22 are equipped with induced draft fans at their top.

[0087] exist Figure 2In the middle, the evaporative heat exchanger 21 is connected to a built-in cooling system.

[0088] The built-in cooling system includes a cooling water tank, a cooling circulation pump I, and a spray water distributor connected to the cooling circulation pump I via pipelines.

[0089] Similarly, the spray water distributor and the evaporative heat exchanger 21 should be arranged close to each other with a sufficiently small distance between them, and the evaporative heat exchanger 21 and the cooling water tank should be arranged close to each other with a sufficiently small distance between them.

[0090] In some embodiments, a waste (hot) water source heat exchanger and a waste (hot) water source control valve, a solar collector heat exchanger and a solar control valve, and a ground (water) source heat exchanger and a ground (water) source control valve may also be connected in parallel at the cooling water inlet and cooling water outlet, so as to realize the diversified and optimized utilization of multiple existing cold and heat sources in the cooling / heating mode according to the location and time.

[0091] The ejector enthalpy enhancement module includes an ejector 31, a gas-liquid separator 32, and nodes I' connected to the rectifier module and J' connected to the economizer module respectively through multi-way valves and pipelines;

[0092] The ejector 31 is provided with an air inlet, an air intake, and an ejection port;

[0093] The gas-liquid separator 32 is provided with a first refrigerant inlet, a first refrigerant outlet, a second refrigerant inlet, and a second refrigerant outlet;

[0094] The intake port has a node C' connected to the refrigerant pump push module, the first refrigerant outlet has a node D' connected to the refrigerant pump push module, the injection port is connected to the first refrigerant inlet, and the second refrigerant outlet has a node J' connected to the economizer module.

[0095] Figure 12 An embodiment of the multi-way valve group in the ejector enthalpy enhancement module is shown, which is a seventh three-way valve T7. The air inlet, node I', and the second refrigerant inlet are respectively connected to the three valve ports of the seventh three-way valve T7 through pipelines.

[0096] Figure 13 Other embodiments of the multi-way valve group in the ejector enthalpy enhancement module are shown, which can be a thirteenth two-way valve L13 and a fourteenth two-way valve L14. The thirteenth two-way valve L13 is connected between the air inlet and node I', and the fourteenth two-way valve L14 is connected between the second refrigerant inlet and node I'.

[0097] The economizer module includes an economizer 41, an enthalpy-increasing solenoid valve 42, and an enthalpy-increasing expansion valve 43;

[0098] Reference Figure 14Economist 41 is a plate heat exchanger, which has a node E' connected to the refrigerant pump push module, a node J connected to the ejector enthalpy enhancement module, and a node H' connected to the rectifier module. Figure 15 This illustrates the case where the economizer 41 in the economizer module is a flash evaporator.

[0099] Use side modules, including indoor side heat exchanger 51;

[0100] Reference Figure 16 The indoor heat exchanger 51 has a chilled water inlet and a chilled water outlet;

[0101] The indoor heat exchanger 51 also has a node B' connected to the refrigerant pump push module and a node G' connected to the rectifier module.

[0102] The nodes A1 and A1', A2 and A2', B and B', C and C', D and D', E and E', F and F', G and G', H and H', I and I', and J and J' are connected accordingly.

[0103] This application also relates to an ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump multi-split unit, which includes the refrigerant pump push module, rectifier module, cold and heat source heat exchanger module, ejector-induced enthalpy-enhancing module, economizer module, and user-side module as described in any of the above embodiments.

[0104] Reference Figure 17 Its side module includes multiple sets of indoor side heat exchangers 51 arranged in parallel.

[0105] The following section will provide a detailed description of an ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump unit according to this application, in conjunction with the accompanying drawings and different operating modes of the unit.

[0106] Example 1

[0107] Reference Figure 18 Air-cooled conventional cooling mode:

[0108] Refrigerant circulation system: The first four-way valve Q1ob and ai ends are connected; the second four-way valve Q2ia and bo ends are connected; the third four-way valve Q3ib and ao ends are connected; the sixth three-way valve T6oa end is connected; the thirteenth two-way valve L13 is closed; the fourteenth two-way valve L14 is open; the enthalpy-increasing solenoid valve 42 is closed.

[0109] Refrigerant circulation path: The refrigerant flows sequentially through the compressor 11 injection port, the first valve port o and the fourth valve port b of the first four-way valve Q1, the first valve port o and the fourth valve port b of the second four-way valve Q2, the air source heat exchanger 22, the second valve port a and the first valve port o of the sixth three-way valve T6, the first valve port o and the third valve port a of the third four-way valve Q3 of the rectifier module, the fourteenth two-way valve L14 of the ejector enthalpy enhancement module, and the second refrigerant inlet of the gas-liquid separator 32. After gas-liquid separation, the low-pressure refrigerant vapor passes through the gas-liquid separator. The refrigerant completes a high-pressure cycle via the first outlet of refrigerant (32) and the return port of compressor (11); the liquid refrigerant completes a refrigeration cycle via the second outlet of refrigerant (32), the first inlet and outlet of economizer (41), the heating and cooling expansion valve, the fourth port b and the second port i of the third four-way valve Q3, the indoor heat exchanger (51), the third port a and the second port i of the second four-way valve Q2, the suction port and the injection port of ejector (31), the first inlet of refrigerant (32), the first outlet of refrigerant (32), and the return port of compressor (11).

[0110] Water circulation system:

[0111] 1) Cooling system: Spray pump is turned off, cooling water pump is turned off, evaporative heat exchanger 21 stops working; fan is turned on, air source heat exchanger 22 works.

[0112] Lower-temperature air from the environment flows over the surface of the air source heat exchanger 22 under the action of the fan, exchanges heat with the refrigerant vapor inside the heat exchanger and is heated up, and is discharged through the exhaust port of the heat exchanger unit. The higher-temperature refrigerant vapor is cooled and liquefied and enters the rectifier module.

[0113] 2) Refrigeration System: Higher-temperature chilled water from the room, propelled by a chilled water pump, flows through the chilled water inlet, heat exchanger inlet, and into the indoor heat exchanger 51. There, it exchanges heat with the liquid refrigerant flowing through the heat exchanger, cooling the water. The cooled water then flows through the heat exchanger outlet, chilled water outlet, and into the room for cooling. The liquid refrigerant vaporizes, absorbs heat, and heats up before continuing to the next stage. Low-temperature chilled water exchanges heat with the indoor air, heating up, and then flows back to the indoor heat exchanger 51 to continue heat exchange, completing one cooling cycle.

[0114] Example 2

[0115] Reference Figure 19 Evaporative cooling ejector mode:

[0116] Refrigerant circulation system: The first four-way valve Q1oa and bi ends are connected; the second four-way valve Q2ia and bo ends are connected; the third four-way valve Q3ib and ao ends are connected; the sixth three-way valve T6bo end is connected; the thirteenth two-way valve L13 is open; the fourteenth two-way valve L14 is closed; the enthalpy-increasing solenoid valve 42 is closed.

[0117] In the high-pressure refrigerant circuit of the refrigerant circulation, the refrigerant flows sequentially through the steam injection port of compressor 11, the first valve port o and the third valve port a of the first four-way valve Q1, the evaporative heat exchanger 21, the third valve port b and the first valve port o of the sixth three-way valve T6, the first valve port o and the third valve port a of the third four-way valve Q3, the thirteenth two-way valve L13 of the ejector enthalpy enhancement module, the air inlet of ejector 31, the injection port, the first refrigerant inlet of gas-liquid separator 32, the first refrigerant outlet, and the return port of compressor 11.

[0118] In the low-pressure refrigerant circuit of the refrigerant circulation, the refrigerant flows sequentially through the second refrigerant outlet of the gas-liquid separator 32, the first inlet and first outlet of the economizer 41, the heating and cooling expansion valve, the fourth valve port b and the second valve port i of the third four-way valve Q3, the indoor heat exchanger 51, the third valve port a and the second valve port i of the second four-way valve Q2, the suction port and the injection port of the ejector 31, the first refrigerant inlet of the gas-liquid separator 32, the first refrigerant outlet, and the return port of the compressor 11.

[0119] In the high-pressure refrigeration cycle, the high-pressure, high-speed two-phase refrigerant serves as the working fluid. It enters the mixing chamber of ejector 31 from the inlet and entrains low-pressure, low-speed refrigerant vapor from the intake port. The two refrigerant streams exchange momentum and mass within the mixing chamber of ejector 31, resulting in increased mixing pressure. After deceleration in the diffuser chamber, the pressure further increases before being discharged from the ejector 31 outlet. The refrigeration cycle with the addition of ejector 31 can effectively absorb power losses caused by the work of compressor 11, expansion valve pressure reduction, and pipeline friction, thereby improving the overall efficiency of the refrigeration cycle without increasing the power of compressor 11.

[0120] Cooling system of water circulation system: Cooling water pump starts, spray pump starts, fan starts, spray water distributor sprays. Air source heat exchanger 22 stops working.

[0121] The lower-temperature cooling water from the cooling tower is sprayed onto the surface of the evaporative heat exchanger 21 by the spray distributor under the action of the pump. After exchanging heat with the refrigerant vapor flowing inside the heat exchanger, it is partially vaporized into water vapor and discharged by the fan. The cooling water that is not vaporized and heated drips into the cooling water tank and is then pushed into the cooling tower by the cooling water pump for cooling. After cooling, the lower-temperature cooling water is pumped into the unit's spray distributor for a cooling cycle. After the refrigerant is cooled and liquefied, it enters the rectifier module to continue the cycle.

[0122] Example 3

[0123] Reference Figure 20 Air-cooled ejector cooling mode:

[0124] Refrigerant circulation system: The first four-way valve Q1ob and ai ends are connected; the second four-way valve Q2ia and bo ends are connected; the third four-way valve Q3ib and ao ends are connected; the sixth three-way valve T6oa end is connected; the thirteenth two-way valve L13 is open; the fourteenth two-way valve L14 is closed; the enthalpy-increasing solenoid valve 42 is closed.

[0125] In the high-pressure refrigerant circuit of the refrigerant circulation, the refrigerant flows sequentially through the steam injection port of compressor 11, the first valve port o and the fourth valve port b of the first four-way valve Q1, the first valve port o and the fourth valve port b of the second four-way valve Q2, the air source heat exchanger 22, the second valve port a and the first valve port o of the sixth three-way valve T6, the first valve port o and the third valve port a of the third four-way valve Q3, the thirteen two-way valve of the ejector enthalpy enhancement module, the air inlet of ejector 31, the injection port, the first refrigerant inlet of gas-liquid separator 32, the first refrigerant outlet, and the return port of compressor 11.

[0126] In the low-pressure refrigerant circuit of the refrigerant cycle, the refrigerant completes one refrigeration cycle through the second refrigerant outlet of the gas-liquid separator 32, the first inlet and first outlet of the economizer 41, the heating and cooling expansion valve, the fourth valve port b and the second valve port i of the third four-way valve Q3, the indoor heat exchanger 51, the third valve port a and the second valve port i of the second four-way valve Q2, the suction port and the injection port of the ejector 31, the first refrigerant inlet and the first refrigerant outlet of the gas-liquid separator 32, and the return port of the compressor 11.

[0127] The water circulation system is the same as in Example 1.

[0128] Example 4

[0129] Reference Figure 21 Air source heat pump conventional heating mode:

[0130] Refrigerant circulation system: The first four-way valve Q1ob and ai ends are connected; the second four-way valve Q2oa and bi ends are connected; the third four-way valve Q3ia and bo ends are connected; the sixth three-way valve T6ao end is connected; the thirteenth two-way valve L13 is closed; the fourteenth two-way valve L14 is open; the enthalpy-increasing solenoid valve 42 is closed.

[0131] Refrigerant circulation path: The refrigerant flows sequentially through the steam injection port of compressor 11, the first valve port o and the fourth valve port b of the first four-way valve Q1, the first valve port o and the third valve port a of the second four-way valve Q2, the indoor heat exchanger 51, the second valve port i and the third valve port a of the third four-way valve Q3 of the rectifier module, the fourteenth two-way valve L14 of the ejector enthalpy enhancement module, the second refrigerant inlet of gas-liquid separator 32, and the gaseous refrigerant through the first refrigerant outlet of gas-liquid separator 32 to the return port of compressor 11.

[0132] The refrigerant liquid flows sequentially through the second refrigerant outlet of the gas-liquid separator 32, through the first inlet and first outlet of the economizer 41, the cold and heat expansion valve, the fourth valve port b and the first valve port o of the third four-way valve Q3, the first valve port o and the second valve port a of the sixth three-way valve T6 of the cold and heat source heat exchanger module, the air source heat exchanger 22, the fourth valve port b and the second valve port i of the second four-way valve Q2, the suction port and the injection port of the ejector 31, the first refrigerant inlet and the first refrigerant outlet of the gas-liquid separator 32, and the return port of the compressor 11 to complete one heating cycle.

[0133] Water circulation system:

[0134] 1) Cooling system: The cooling water pump and spray pump are shut down, and the evaporative heat exchanger 21 stops working; the fan starts, and the air source heat exchanger 22 works. Outdoor air exchanges heat with the air source heat exchanger 22 under the action of the fan. The refrigerant absorbs heat, vaporizes, and rises in temperature before starting the next cycle; the air is then discharged from the unit after cooling down.

[0135] 2) Refrigeration system:

[0136] Lower-temperature chilled water from indoors is pumped through the inlet of the inner heat exchanger and into the indoor heat exchanger 51. There, it exchanges heat with the liquid refrigerant flowing through the heat exchanger, increasing its temperature before exiting the heat exchanger and entering the room for heating. The vaporized refrigerant liquefies, releasing heat and cooling down, before continuing to the next stage. High-temperature chilled water exchanges heat with indoor air, cooling down, and then flows back to the indoor heat exchanger 51 to continue absorbing heat, completing one heating cycle.

[0137] Example 5

[0138] Reference Figure 22 Air-cooled ejector heating mode with increased enthalpy:

[0139] Refrigerant circulation system: The first four-way valve Q1ob and ai ends are connected; the second four-way valve Q2oa and bi ends are connected; the third four-way valve Q3ia and bo ends are connected; the sixth three-way valve T6oa end is connected; the thirteenth two-way valve L13 is open; the fourteenth two-way valve L14 is closed; the enthalpy-increasing solenoid valve 42 is open.

[0140] The refrigerant circulation path is as follows: The refrigerant flows sequentially through the steam injection port of compressor 11, the first valve port o and the fourth valve port b of the first four-way valve Q1, the first valve port o and the third valve port a of the second four-way valve Q2, the indoor heat exchanger 51, the second valve port i and the third valve port a of the third four-way valve Q3 of the rectifier module, and the thirteenth two-way valve L13 of the ejector enthalpy enhancement module, splitting into two paths: In the high-pressure circuit, the refrigerant flows through the inlet and outlet of ejector 31, the first refrigerant inlet and the first refrigerant outlet of gas-liquid separator 32, and the return port of compressor 11. In the low-pressure circuit, the liquid refrigerant flows through the second refrigerant outlet of gas-liquid separator 32, further splitting into two circuits:

[0141] 1) The main circuit completes a refrigeration cycle through the first inlet and first outlet of the economizer 41, the cold and heat expansion valve, the fourth valve port b and the first valve port o of the third four-way valve Q3, the first valve port o and the second valve port a of the sixth three-way valve T6 of the cold and heat source heat exchanger module, the air source heat exchanger 22, the fourth valve port b and the second valve port i of the second four-way valve Q2, the suction port and the injection port of the ejector 31, the first refrigerant inlet and the first refrigerant outlet of the gas-liquid separator 32, and the return port of the compressor 11.

[0142] 2) The auxiliary EVI circuit completes the refrigeration cycle through the enthalpy-increasing solenoid valve 42, the second inlet and second outlet of the economizer 41, and the enthalpy-increasing suction port of the compressor 11.

[0143] The refrigerant, after being throttled and depressurized by the enthalpy-increasing expansion valve 43, enters the economizer 41 simultaneously with the refrigerant with higher pressure after being split, for heat exchange. The low-pressure side refrigerant absorbs heat from the high-pressure side refrigerant and vaporizes, while the high-pressure side refrigerant releases heat and further condenses into liquefaction, becoming subcooled. The refrigerant vapor flows back to the compressor 11 through the enthalpy-increasing suction port, fully recovering heat energy, improving the working environment of the compressor 11, reducing the compression ratio, and increasing working efficiency.

[0144] In the high-pressure refrigeration cycle, the high-pressure, high-speed two-phase refrigerant, acting as the working fluid, is injected from the inlet into the mixing chamber of ejector 31, entraining low-pressure, low-speed ejector fluid refrigerant vapor from the intake port. The two refrigerant streams exchange momentum and mass within the mixing chamber of ejector 31, resulting in increased mixing pressure. After deceleration in the diffuser chamber, the pressure further increases before being discharged from the ejector 31's nozzle. The addition of ejector 31 to the refrigeration cycle effectively absorbs power losses caused by the work of compressor 11, expansion valve pressure reduction, and pipeline friction, improving the overall efficiency of the refrigeration cycle without increasing the power of compressor 11.

[0145] Water circulation system:

[0146] 1) Cooling system: The cooling water pump and spray pump are shut down, and the evaporative heat exchanger 21 stops working; the fan starts, and the air source heat exchanger 22 works. Outdoor air exchanges heat with the air source heat exchanger 22 under the action of the fan. The refrigerant absorbs heat, vaporizes, and rises in temperature before starting the next cycle; the air is then discharged from the unit after cooling down.

[0147] 2) Refrigeration System: Lower-temperature chilled water from the indoor unit is pumped through the inlet of the indoor heat exchanger and into the indoor heat exchanger 51. There, it exchanges heat with the liquid refrigerant flowing through the heat exchanger, increasing its temperature before exiting the heat exchanger and entering the room for heating. The vaporized refrigerant liquefies, releasing heat and cooling down, before continuing to the next stage. High-temperature chilled water exchanges heat with the indoor air, cooling down, and then flows back to the indoor heat exchanger 51 to continue absorbing heat, completing one heating cycle.

[0148] Example 6

[0149] Reference Figure 23Air-cooled enthalpy-increasing heating mode:

[0150] Refrigerant circulation system: The first four-way valve Q1ob and ai ends are connected; the second four-way valve Q2oa and bi ends are connected; the third four-way valve Q3ia and bo ends are connected; the sixth three-way valve T6oa end is connected; the thirteenth two-way valve L13 is closed; the fourteenth two-way valve L14 is open; the enthalpy-increasing solenoid valve 42 is open.

[0151] The refrigerant circulation path is as follows: the refrigerant flows sequentially through the steam injection port of compressor 11, the first valve port o and the fourth valve port b of the first four-way valve Q1, the first valve port o and the third valve port a of the second four-way valve Q2, the indoor heat exchanger 51, the second valve port i and the third valve port a of the third four-way valve Q3 of the rectifier module, the fourteenth two-way valve L14 of the ejector enthalpy enhancement module, the second refrigerant inlet of gas-liquid separator 32, and the low-pressure steam returns to the compressor 11 return port through the first refrigerant outlet of gas-liquid separator 32. The liquid refrigerant is divided into two paths after passing through the second refrigerant outlet of gas-liquid separator 32:

[0152] 1) The main circuit completes a refrigeration cycle through the first inlet and first outlet of the economizer 41, the cold and heat expansion valve, the fourth valve port b and the first valve port o of the third four-way valve Q3, the first valve port o and the second valve port a of the sixth three-way valve T6 of the cold and heat source heat exchanger module, the air source heat exchanger 22, the fourth valve port b and the second valve port i of the second four-way valve Q2, the suction port and the injection port of the ejector 31, the first refrigerant inlet and the first refrigerant outlet of the gas-liquid separator 32, and the return port of the compressor 11.

[0153] 2) The auxiliary EVI circuit completes the refrigeration cycle through the enthalpy-increasing solenoid valve 42, the second inlet and second outlet of the economizer 41, and the enthalpy-increasing suction port of the compressor 11.

[0154] The water circulation system is the same as in Example 5.

[0155] Example 7

[0156] Reference Figure 24 Air-cooled heat pump in standard defrosting mode:

[0157] Refrigerant circulation system: The first four-way valve Q1bo and ai ends are connected; the second four-way valve Q2ob and ai ends are connected; the third four-way valve Q3ib and ao ends are connected; the sixth three-way valve T6oa end is connected; the thirteenth two-way valve L13 is closed; the fourteenth two-way valve L14 is open; the enthalpy-increasing solenoid valve 42 is closed.

[0158] The refrigerant circulation path is as follows: the refrigerant flows sequentially through the steam injection port of compressor 11, the first valve port o and the fourth valve port b of the first four-way valve Q1, the first valve port o and the fourth valve port b of the second four-way valve Q2, the air source heat exchanger 22, the second valve port a and the first valve port o of the sixth three-way valve T6, the first valve port o and the third valve port a of the third four-way valve Q3 of the rectifier module, the fourteenth two-way valve L14 of the ejector enthalpy enhancement module, the second refrigerant inlet of gas-liquid separator 32, and the refrigerant vapor enters the return port of compressor 11 through the first refrigerant outlet of gas-liquid separator 32. The liquid refrigerant passes through the first inlet and the first outlet of economizer 41, the cold and heat expansion valve, the fourth valve port b and the second valve port i of the third four-way valve Q3, the indoor heat exchanger 51, the third valve port a and the second valve port i of the second four-way valve Q2, the suction port and the injection port of ejector 31, the first refrigerant inlet of gas-liquid separator 32, the first refrigerant outlet, and the return port of compressor 11 to complete one defrosting cycle.

[0159] Water circulation system:

[0160] 1) Cooling system: Spray pump is off, evaporative heat exchanger 21 is off, cooling water pump is off. Fan is off, air source heat exchanger 22 is in defrosting mode.

[0161] 2) Refrigeration System: Higher-temperature chilled water from the indoor unit is pumped through a Y-type filter, chilled water pump, check valve, indoor heat exchange control valve, chilled water inlet, and enters indoor heat exchanger 51. It exchanges heat with the liquid refrigerant flowing through this heat exchanger, cooling down before exiting through the heat exchanger outlet and entering the room to absorb heat. The liquid refrigerant vaporizes, absorbing heat and rising in temperature. The low-temperature chilled water then exchanges heat with the indoor air, rising in temperature before returning to indoor heat exchanger 51, completing one cooling cycle. After vaporization in indoor heat exchanger 51, the refrigerant returns to compressor 11, generating high-temperature, high-pressure steam. This steam is then discharged from compressor 11 into air source heat exchanger 22, where it exchanges heat with the ice (frost) on the surface of air source heat exchanger 22. The refrigerant is liquefied, the ice melts, and it is discharged from the unit casing. The refrigerant then continues the next cycle, completing the defrosting process.

[0162] Due to space limitations, only a portion of the working modes of this application are described above.

[0163] It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention and within the pipeline design should be included within the protection scope of the present invention.

Claims

1. A multi-unit system composed of ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump units, characterized in that: It includes a refrigerant pump push module, a rectifier module, a cold and heat source heat exchanger module, an ejector enthalpy enhancement module, an economizer module, and a user-side module; The refrigerant pump module includes a compressor, which is equipped with a steam injection port, a return port, and an enthalpy-increasing suction port. The steam injection port forms nodes A1 and A2 connected to the cold and heat source heat exchanger module and node B connected to the user side module through a multi-way valve and pipeline; node C connected to the ejector enthalpy enhancement module is formed between node A1 and node B through a multi-way valve and pipeline. The return gas port is connected to node D of the ejector enthalpy enhancement module via a pipeline; The enthalpy-increasing intake port is connected to node E of the economizer module via a pipeline; The rectifier module includes a node F connected to the heat exchanger module via a multi-way valve and pipelines, a node G connected to the user-side module, a node H connected to the economizer module, and a node I connected to the ejector enthalpy enhancement module. The heat exchanger module includes an evaporative heat exchanger and an air source heat exchanger, as well as nodes A1' and A2' connected to the refrigerant pump push module and node F' connected to the rectifier module, respectively, through multi-way valves and pipelines. The ejector enthalpy enhancement module includes an ejector, a gas-liquid separator, and nodes I' connected to the rectifier module and J' connected to the economizer module respectively, formed by a multi-way valve and pipelines. The ejector is provided with an air inlet, an air intake, and an ejection port; The gas-liquid separator is provided with a first refrigerant inlet, a first refrigerant outlet, a second refrigerant inlet, and a second refrigerant outlet; The air intake has a node C' connected to the refrigerant pump push module, the first refrigerant outlet has a node D' connected to the refrigerant pump push module, the injection port is connected to the first refrigerant inlet, and the second refrigerant outlet has a node J' connected to the economizer module. The economizer module has a node E' connected to the refrigerant pump push module, a node J connected to the ejector enthalpy enhancement module, and a node H' connected to the rectifier module. The user-side module includes multiple sets of indoor-side heat exchangers arranged in parallel; The indoor heat exchanger has a chilled water inlet and a chilled water outlet; The indoor heat exchanger also has a node B' connected to the refrigerant pump push module and a node G' connected to the rectifier module; The nodes A1 and A1', A2 and A2', B and B', C and C', D and D', E and E', F and F', G and G', H and H', I and I', and J and J' are connected accordingly. In the refrigerant pump push module: The multi-way valve is a first four-way valve and a second four-way valve. The steam injection port, node A1, and node C are respectively connected to the three valve ports of the first four-way valve through pipelines. Node A2, node B, and node C are respectively connected to the three valve ports of the second four-way valve through pipelines. The remaining valve ports of the first four-way valve and the second four-way valve are connected to each other through a first connecting pipe. In the rectifier module: The multi-way valve is a third four-way valve, and nodes F, G, H and I are respectively connected to its four valve ports through pipelines; In the aforementioned heat exchanger module: The multi-way valve is a sixth three-way valve. The evaporative heat exchanger, the air source heat exchanger, and node F' are respectively connected to the three valve ports of the sixth three-way valve through pipelines. The evaporative heat exchanger is connected to the refrigerant pump push module through node A1', and the air source heat exchanger is connected to the refrigerant pump push module through node A2'. In the ejector enthalpy enhancement module: The multi-way valve is a seventh three-way valve, and the air inlet, node I', and the second refrigerant inlet are respectively connected to the three valve ports of the seventh three-way valve through pipelines; The evaporative heat exchanger is connected to a separate cooling system; The separate cooling system includes a cooling water tank, a cooling circulation pump I, a spray water distributor, a cooling circulation pump II, and a cooling tower. The cooling circulation pump II is located inside the cooling water tank and is connected to the cooling water inlet. The cooling circulation pump I is connected to the cooling water outlet, and the cooling water outlet is connected to the spray water distributor. The cooling circulation pump I and the cooling tower are connected in parallel to the cooling water inlet and the cooling water outlet.

2. The multi-unit system composed of an ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump unit as described in claim 1, characterized in that: In the refrigerant pump push module: The multi-way valve is replaced by a first three-way valve, a second three-way valve, and a third three-way valve. The steam injection port and the parallel nodes A1 and A2 are respectively connected to the two valve ports of the first three-way valve through pipelines. The node B and the parallel nodes A1 and A2 are respectively connected to the two valve ports of the third three-way valve through pipelines. The remaining valve port of the first three-way valve and the third three-way valve are connected through a second connecting pipe. The nodes B, C, and the parallel nodes A1 and A2 are respectively connected to the three valve ports of the second three-way valve through pipelines. Alternatively, the multi-way valve can be replaced by a first two-way valve, a second two-way valve, a third two-way valve, a fourth two-way valve, a ninth two-way valve, and a tenth two-way valve. The steam injection port is connected to the first two-way valve and the second two-way valve via a pipeline. Nodes A1 and A2 are connected in parallel and then connected to the first two-way valve, the third two-way valve, and the tenth two-way valve, respectively. The first two-way valve, the second two-way valve, and the ninth two-way valve are connected in series to node B. The third two-way valve and the fourth two-way valve are connected in series to node B. The tenth two-way valve is connected to the second two-way valve and the ninth two-way valve via a pipeline. Node C is connected to the third two-way valve and the fourth two-way valve via a pipeline.

3. The multi-unit system composed of an ejector-induced enthalpy-increasing evaporative cooling air-cooled heat pump unit as described in claim 1, characterized in that: In the rectifier module: The multi-way valve is replaced by a fourth three-way valve and a fifth three-way valve arranged in parallel. Nodes F, H, and I are respectively connected to the three valve ports of the fourth three-way valve through pipelines. Nodes G, H, and I are respectively connected to the three valve ports of the fifth three-way valve through pipelines. Alternatively, the multi-way valve can be replaced by a fifth two-way valve and a sixth two-way valve connected in series, and a seventh two-way valve and an eighth two-way valve connected in parallel and in series. Node F is connected between the fifth two-way valve and the sixth two-way valve, node G is connected between the seventh two-way valve and the eighth two-way valve, node H is connected between the sixth two-way valve and the eighth two-way valve, and node I is connected between the fifth two-way valve and the seventh two-way valve. Alternatively, the multi-way valve can be replaced by a first check valve, a second check valve connected in series, and a third check valve and a fourth check valve connected in parallel and in series with them.

4. The multi-unit system composed of an ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump unit as described in claim 1, characterized in that: In the aforementioned heat exchanger module: The multi-way valve is replaced by an eleventh two-way valve and a twelfth two-way valve. The eleventh two-way valve is connected between the air source heat exchanger and node F', and the twelfth two-way valve is connected between the evaporative cooling heat exchanger and node F'. The evaporative cooling heat exchanger is connected to the refrigerant pump push module through node A1', and the air source heat exchanger is connected to the refrigerant pump push module through node A2'.

5. The multi-unit chiller comprising an ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump unit as described in claim 1, characterized in that: In the ejector enthalpy enhancement module: The multi-way valve is replaced by a thirteenth two-way valve and a fourteenth two-way valve. The thirteenth two-way valve is connected between the air inlet and node I', and the fourteenth two-way valve is connected between the second refrigerant inlet and node I'.

6. The multi-unit chiller comprising an ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump unit as described in claim 1, characterized in that: The economizer module includes an economizer, an enthalpy-increasing solenoid valve, and an enthalpy-increasing expansion valve. The economizer has a node E' connected to the refrigerant pump push module, a node J connected to the ejector enthalpy enhancement module, and a node H' connected to the rectifier module. The economizer is a plate heat exchanger or a flash evaporator.

7. The multi-unit system composed of an ejector-induced enthalpy-enhancing evaporative cooling air-cooled heat pump unit according to claim 1, characterized in that: The cooling water inlet and cooling water outlet are also equipped with a waste (hot) water source heat exchanger and a waste (hot) water source control valve, a solar collector heat exchanger and a solar control valve, and a ground (water) source heat exchanger and a ground (water) source control valve connected in parallel.

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