Multi-connected unit composed of ejection enthalpy-increasing multi-source cold and hot water pump module units

Abstract

This invention discloses a multi-unit chiller / heat pump module assembly comprised of a refrigerant pump module, including a refrigerant pump module, a rectifier module, a heat exchanger module, an enthalpy-increasing ejector module, an economizer module, a user-side module, and a heat source module. This application highly integrates the traditional water-cooled chiller and cooling tower into a single unit. Using an air-cooled heat pump module as a template, it adds an air-cooled heat exchanger to the water-cooled unit, creating a novel model that combines an air-cooled heat pump unit and a water-cooled unit—an integrated air-water heat pump module unit. This not only achieves miniaturization and modularization of traditional chillers but also expands the air-cooled heat pump heating function of the water-cooled unit. Furthermore, the use of jet enthalpy enhancement and ejector composite technology greatly improves the mechanical efficiency of the heat pump, enabling the miniaturization of large units, integrated refrigeration and cooling, integrated air-cooling and water-cooling, diversified cold and heat sources, high efficiency in cooling and heating, and convenient installation and maintenance.

Description

[0001] This application is a divisional application of the invention patent application number: 202110640026.2, invention title: A multi-source hot and cold water pump module unit with ejector enthalpy enhancement. Technical Field

[0002] This invention relates to the field of heat exchangers, and in particular to a multi-unit system composed of ejector-induced enthalpy-enhancing multi-source hot and cold water pump module units. Background Technology

[0003] The market share of existing central air conditioning air-cooled chiller (heat pump) units and water-cooled chiller units is over 90%.

[0004] 1. Air-cooled heat pumps utilize outdoor ambient air as a cold and heat source: Advantages include cooling in summer and heating in winter, serving two purposes in one unit; small size and light weight, facilitating transportation, construction, and maintenance; roof installation does not occupy indoor space; multiple units can be connected in parallel as backups, resulting in strong system stability; Disadvantages include high condensing temperature during cooling, resulting in low cooling efficiency and energy consumption more than 30% higher than water-cooled (including evaporative cooling) types; low evaporation temperature during heating, leading to severe reduction in heating capacity at low ambient temperatures, resulting in low heating efficiency.

[0005] 2. Water-cooled (including evaporative cooling) units utilize "low-temperature" water as a cold source: Advantages include high single-unit power and strong cooling capacity, meeting the cooling needs of large-area scenarios; low condensing temperature, resulting in high cooling efficiency; Disadvantages include large size and weight, making transportation, installation, and maintenance inconvenient, requiring an indoor machine room and wasting indoor space; separation of the refrigeration unit and cooling tower leads to excessively long cooling pipe networks, increasing construction workload, difficulty, and cost; increased cooling cycle energy consumption and significant cooling water waste; few standby units, resulting in poor system stability; high energy consumption under partial load; and inability to use due to limited installation space.

[0006] Based on the technical limitations of the aforementioned units, this application proposes a new model that integrates an air-cooled chiller (heat pump) unit and a water-cooled chiller unit into one unit—an integrated heat pump module unit that integrates air and water as cold and heat sources, namely, an integrated multi-source chilled and hot water pump module unit. Summary of the Invention

[0007] This application aims to address the problems of existing heat pump units, such as limited functionality, high energy consumption, and restricted operating environment; as well as the problems of water-cooled chillers, such as large size, limited installation space, inability to be used, and lack of heating function.

[0008] The technical solution adopted by this invention to solve its technical problem is as follows:

[0009] An ejector-induced enthalpy-enhancing multi-source hot and cold water pump module unit includes a refrigerant pump push module, a rectifier module, a hot and cold source heat exchanger module, an ejector-induced enthalpy-enhancing module, an economizer module, a user-side module, and a hot and cold source module.

[0010] 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;

[0011] 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 group 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 group and pipeline.

[0012] The return gas port is connected to node D of the ejector enthalpy enhancement module via a pipeline;

[0013] The enthalpy-increasing intake port is connected to node E of the economizer module via a pipeline;

[0014] Optionally, the multi-way valve group consists of 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.

[0015] Optionally, the multi-way valve group comprises 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 via 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 via pipelines. The remaining valve ports of the first three-way valve and the third three-way valve are connected via 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 via pipelines.

[0016] Optionally, the multi-way valve group comprises 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.

[0017] The rectifier module includes a node F connected to the heat exchanger module via a multi-way valve assembly 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.

[0018] Optionally, the multi-way valve group is a third four-way valve, and nodes F, G, H and I are respectively connected to its four valve ports through pipelines;

[0019] Optionally, the multi-way valve group consists of 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.

[0020] Optionally, the multi-way valve group consists of 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.

[0021] Optionally, the multi-way valve group consists of 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.

[0022] The heat exchanger module includes a water source 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 a multi-way valve group and pipelines.

[0023] Optionally, the multi-way valve group is a sixth three-way valve. The water source 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 water source 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'.

[0024] Optionally, the multi-way valve group consists of 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 water source heat exchanger and node F'. The water source 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'.

[0025] 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 group and pipelines.

[0026] The ejector is provided with an air inlet, an air intake, and an ejection port;

[0027] The gas-liquid separator is provided with a first refrigerant inlet, a first refrigerant outlet, a second refrigerant inlet, and a second refrigerant outlet;

[0028] 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.

[0029] Optionally, the multi-way valve group is a seventh three-way valve, and the air inlet, node I', and refrigerant second inlet are respectively connected to the three valve ports of the seventh three-way valve through pipelines;

[0030] Optionally, the multi-way valve group consists of a thirteenth two-way valve and a fourteenth two-way valve, with the thirteenth two-way valve connected between the air inlet and node I', and the fourteenth two-way valve connected between the second refrigerant inlet and node I'.

[0031] Economizer module, including economizer, enthalpy-increasing solenoid valve, and enthalpy-increasing expansion valve;

[0032] 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.

[0033] Optionally, the economizer is a plate heat exchanger;

[0034] Optionally, the economizer is a flash evaporator.

[0035] Use side modules, including indoor side heat exchangers;

[0036] The indoor heat exchanger has a chilled water inlet and a chilled water outlet;

[0037] 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.

[0038] The heat source / cold source module includes a cooling water inlet and a cooling water outlet;

[0039] The water source heat exchanger is connected in series between the cooling water inlet and the cooling water outlet;

[0040] A multi-source cooling system is connected in parallel to the cooling water inlet and cooling water outlet;

[0041] The multi-source cooling system includes a closed cooling system or an open cooling system;

[0042] The cooling water inlet pipeline is equipped with a filter, a cooling water pump, a check valve, and a water source heat exchanger control valve.

[0043] The cooling water inlet pipe is also connected to a pressure stabilizing tank, a water supply electric valve, and a water supply pump, forming a constant pressure water supply system.

[0044] Preferably, the multi-source cooling system further includes:

[0045] Waste (heat) water source heat exchanger and waste (heat) water source control valve, solar collector heat exchanger and solar control valve, ground (water) source heat exchanger and ground (water) source control valve are installed in parallel at the cooling water inlet and cooling water outlet.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] The present invention also aims to provide a multi-unit system composed of an ejector-induced enthalpy-increasing multi-source hot and cold water pump module unit, which includes any of the above-mentioned refrigerant pump push module, rectifier module, hot and cold source heat exchanger module, ejector-induced enthalpy-increasing module, economizer module, user side module and hot and cold source module.

[0050] The user-side module includes multiple sets of indoor heat exchangers arranged in parallel.

[0051] The beneficial effects of this invention are as follows:

[0052] This application miniaturizes the refrigeration unit of a traditional water-cooled chiller and matches it with a low-power screw compressor or scroll compressor. Using an air-cooled chilled (heat pump) modular unit as a template, an air source heat exchanger is added in parallel with the heat exchanger on the cold source side (outdoor side) of the water-cooled unit to form an integrated air-water modular unit. At the same time, the outdoor heat exchanger is connected to a ground source, sewage source (waste heat source), and solar heat exchanger in parallel with a closed cooling tower, which can realize the complementary advantages of multiple cold and heat sources of the heat pump unit.

[0053] This unit changes the traditional air-cooled chiller (heat pump) unit cooling method, changing the air-cooled type to water-cooled cooling type: 1. It reduces the condensing temperature and improves the cooling efficiency; 2. The outdoor water source heat exchanger can be connected to a variety of heat sources to realize the utilization of solar energy, geothermal energy and industrial waste heat, thereby improving the heating efficiency of the air-cooled heat pump.

[0054] This unit adds an air source heat exchanger and adopts a heat pump pipeline design to the traditional water-cooled chiller unit: 1. It uses air as a heat source, adds air-cooled heat pump heating function, and makes up for the functional deficiency of traditional water-cooled chiller units that cannot heat; 2. The outdoor water-cooled heat exchanger can be connected to a variety of cold and heat sources to realize the utilization of solar energy, geothermal energy, and industrial waste heat, thereby improving the cooling and heating efficiency of the water-cooled unit; 3. It avoids a series of problems such as inconsistency in transportation, installation, and maintenance, space occupation, and system stability of traditional water-cooled units.

[0055] This invention enables the miniaturization of large-scale units, integration of refrigeration and cooling, integration of air and water cooling, diversification of cold and heat sources, high efficiency in refrigeration and heating, and convenient installation and maintenance.

[0056] By highly integrating the traditional water-cooled chiller and cooling tower into a single unit, and using an air-cooled heat pump modular unit as a template, an air-cooled finned heat exchanger is added to the water-cooled unit. This is matched with a small-power screw compressor or scroll compressor, creating a completely new model that combines an air-cooled heat pump unit and a water-cooled unit—the integrated air-water multi-source chiller / hot water modular unit. This not only achieves small-scale modularization of traditional chiller units but also expands the air-cooled heat pump heating function of the water-cooled unit. The chiller / heat source module integrates cooling and refrigeration. Without starting the heat pump unit, it can directly utilize natural chiller / heat sources, solar energy, and industrial waste heat using the same refrigerant. Furthermore, the refrigeration and cooling systems share a single water supply device, which helps to balance the overall pressure when powered by natural chiller / heat sources, resulting in more stable system operation.

[0057] This unit adopts jet enthalpy enhancement and ejector composite technology to greatly improve the mechanical efficiency of the heat pump, making the equipment itself more energy-efficient; the added water source heat exchanger not only enables the air-cooled heat pump to achieve the cooling function of a water-cooled unit, improving the cooling efficiency of the air-cooled heat pump unit, but also realizes the utilization of solar energy, geothermal energy, and industrial waste heat, greatly improving the heating efficiency of the air-cooled heat pump; through the above design, the unit has a higher cost performance, increases the economic efficiency of the unit, and is easy to promote and popularize.

[0058] This unit breaks through the technical limitations of existing air-cooled heat pumps and water-cooled units, integrating the advantages of both air-cooling and water-cooling technologies to create a new high-efficiency model that combines the two. It will drive a new revolution in the field of air conditioning technology, completely replace existing products, change the existing duopoly of "air-cooled heat pump units" and "water-cooled chillers", create the third category in the world's air conditioning industry, and usher in a new era of central air conditioning development. It can completely replace existing air conditioners and subvert traditional understanding of air conditioning. Attached Figure Description

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

[0060] Figure 1This is a schematic diagram of the piping structure of the ejector-induced enthalpy-enhancing multi-source hot and cold water pump module unit;

[0061] Figures 2-4 A schematic diagram of the piping design for the refrigerant pump push module;

[0062] Figures 5-8 A schematic diagram of the piping design for the rectifier module;

[0063] Figures 9-10 A schematic diagram of the piping design for the heat exchanger module;

[0064] Figures 11-12 A schematic diagram of the piping design for the ejector enthalpy enhancement module;

[0065] Figures 13-14 A schematic diagram of the piping design for the economizer module;

[0066] Figure 15 A schematic diagram of the piping design for using the side module;

[0067] Figures 16-18 This is a schematic diagram of the piping design for the heat source / cold source module.

[0068] Figure 19 A schematic diagram of the connection piping design between the user side module and the cold / heat source module;

[0069] Figure 20 Schematic diagram of the side piping structure for multi-source hot and cold water pumps with ejector-induced enthalpy enhancement;

[0070] Figures 21-29 The following are schematic diagrams of the pipeline structure corresponding to the working modes of Examples 1 to 9, respectively. Detailed Implementation

[0071] 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.

[0072] Reference Figure 1 An ejector-induced enthalpy-enhancing multi-source hot and cold water pump module unit includes a refrigerant pump push module, a rectifier module, a hot and cold source heat exchanger module, an ejector-induced enthalpy-enhancing module, an economizer module, a user-side module, and a hot and cold source module.

[0073] The refrigerant pump push module includes a compressor 11, which is provided with a steam injection port, a return port and an enthalpy-increasing suction port;

[0074] The steam injection port forms nodes A1 and A2, which are connected to the cold and heat source heat exchanger module, and node B, which is connected to the user side module, through a multi-way valve group and pipeline; node C, which is connected to the ejector enthalpy enhancement module, is formed between node A1 (or node A2) and node B through a multi-way valve group and pipeline.

[0075] The return gas port is connected to node D of the ejector enthalpy enhancement module via a pipeline;

[0076] The enthalpy-increasing intake port is connected to node E of the economizer module via a pipeline.

[0077] Figure 2 This paper illustrates one implementation of a multi-port valve group in a refrigerant pump push module, which consists of a first four-port valve Q1 and a second four-port valve Q2. The steam injection port, node A1, and node C are respectively connected to the three valve ports of the first four-port valve Q1 through pipelines. Nodes A2, B, and C are respectively connected to the three valve ports of the second four-port valve Q2 through pipelines. The remaining valve port of the first four-port valve Q1 and the second four-port valve Q2 are connected to each other through a first connecting pipe.

[0078] Figure 3-4 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.

[0079] The rectifier module includes a node F connected to the heat exchanger module via a multi-way valve assembly 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.

[0080] Figure 5 An embodiment of a multi-port valve group in a rectifier module is shown, which is a third four-port valve Q3, wherein nodes F, G, H and I are respectively connected to its four valve ports through pipelines.

[0081] Figure 6-8 Other 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.

[0082] The heat exchanger module includes a water source 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 a multi-way valve group and pipelines.

[0083] Figure 9 An embodiment of a multi-way valve group in a heat exchanger module is shown, which is a sixth three-way valve T6. The water source heat exchanger 21, the 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 water source 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'.

[0084] Figure 10 Another implementation of the multi-way valve group in the cold and heat source heat exchanger module is 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 water source heat exchanger 21 and node F'. The water source 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'.

[0085] 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, formed by a multi-way valve group and pipelines.

[0086] The ejector 31 is provided with an air inlet, an air intake, and an ejection port;

[0087] 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;

[0088] 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.

[0089] Figure 11 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.

[0090] Figure 12 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'.

[0091] The economizer module includes an economizer 41, an enthalpy-increasing solenoid valve 42, and an enthalpy-increasing expansion valve 43.

[0092] Reference Figure 13 Economist 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 14 This illustrates the case where the economizer 41 in the economizer module is a flash evaporator.

[0093] Reference Figure 15 The side module includes an indoor side heat exchanger 51;

[0094] The indoor heat exchanger 51 has a chilled water inlet and a chilled water outlet;

[0095] 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.

[0096] The heat source / cold source module includes a cooling water inlet and a cooling water outlet;

[0097] Water source heat exchanger 21 is connected in series between cooling water inlet and cooling water outlet;

[0098] A multi-source cooling system is connected in parallel at the cooling water inlet and cooling water outlet;

[0099] Reference Figure 16-17 Multi-source cooling systems include closed-loop cooling systems or open-loop cooling systems;

[0100] The cooling water inlet pipeline is equipped with a filter, a cooling water pump, a check valve, and a water source heat exchanger control valve;

[0101] The cooling water inlet pipe is also connected to a pressure stabilizing tank, a water supply electric valve, and a water supply pump, forming a constant pressure water supply system.

[0102] Reference Figure 18 Preferably, the multi-source cooling system also includes 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, which are 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. Figure 19 A feasible connection piping structure for using a side module and a cold / heat source module in a multi-source cooling embodiment is shown.

[0103] 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.

[0104] This application also relates to a multi-source hot and cold water pump unit with ejector enthalpy enhancement, comprising the refrigerant pump push module, rectifier module, hot and cold source heat exchanger module, ejector enthalpy enhancement module, economizer module, user-side module, and hot and cold source module as described in any of the above embodiments. (Refer to...) Figure 20 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 the ejector-induced enthalpy-enhancing multi-source hot and cold water pump module unit of this application, in conjunction with the accompanying drawings and different operating modes of the unit.

[0106] Example 1

[0107] Reference Figure 21 Air-cooled conventional cooling mode:

[0108] Refrigerant circulation system: First four-way valve Q1ob and ai terminals are connected; Second four-way valve Q2ia and bo terminals are connected; Third four-way valve Q3ib and ao terminals are connected; Sixth three-way valve T6oa terminal is connected; Seventh three-way valve T7bo terminal is connected; 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 first valve port o and the third valve port b of the seventh three-way valve T7 of the ejector enthalpy enhancement module, and the second refrigerant inlet of the gas-liquid separator 32. After refrigerant gas-liquid separation, the low-pressure refrigerant vapor passes through... The gas-liquid separator 32, through the first refrigerant outlet and the compressor 11 return port, completes a high-pressure cycle. The liquid refrigerant then passes through the second refrigerant outlet of the gas-liquid separator 32, the first inlet and 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 compressor 11 return port to complete a refrigeration cycle.

[0110] Water circulation system:

[0111] 1) Cooling system: The water source heat exchanger control valve is closed, the cooling water pump is closed, and the water source heat exchanger 21 stops working; the fan is turned on, and the air source heat exchanger 22 is working.

[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 is pumped through the chilled water inlet, heat exchanger inlet, and into the indoor heat exchanger 51. It exchanges heat with the liquid refrigerant flowing inside the heat exchanger, cooling the water. The cooled water then exits through the heat exchanger outlet and chilled water outlet, entering the room for cooling. The liquid refrigerant vaporizes, absorbs heat, and heats up before continuing to the next process. 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] The constant pressure water supply system opens the water supply electric valve when the pressure reaches a certain point and closes when the pressure exceeds that point.

[0115] The cooling system and the refrigeration system use the same refrigerant, such as water, ethylene glycol aqueous solution, or calcium chloride aqueous solution.

[0116] Example 2

[0117] Reference Figure 22 Water-cooled ejector cooling mode:

[0118] Refrigerant circulation system: The first four-way valve Q1oa and bi ends are connected; the second four-way valve Q2ob and ai ends are connected; the third four-way valve Q3oa and bi ends are connected; the sixth three-way valve T6bo end is connected; the seventh three-way valve T7ao end is connected; the enthalpy-increasing solenoid valve 42 is closed.

[0119] In the high-pressure refrigerant circuit of the refrigerant circulation, the refrigerant flows sequentially through the steam injection port of the compressor 11, the first valve port o and the third valve port a of the first four-way valve Q1, the water source 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 first valve port o and the second valve port a of the seventh three-way valve T7 of the ejector enthalpy enhancement module, the air inlet of the ejector 31, the injection port, the first refrigerant inlet of the gas-liquid separator 32, the first refrigerant outlet, and the return port of the compressor 11.

[0120] In the low-pressure refrigerant circuit of the refrigerant cycle, 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.

[0121] 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.

[0122] Water circulation system:

[0123] 1) Cooling system: The water source heat exchanger control valve is opened, the cooling water pump is turned on, and the water source heat exchanger 21 is working; the fan is turned off, and the air source heat exchanger 22 stops working.

[0124] Cooling water (refrigerant) from the cooling tower, at a lower temperature, is propelled by a pump through a filter, cooling water pump, check valve, cooling water inlet, water source heat exchanger control valve, and then enters water source heat exchanger 21. The low-temperature cooling water exchanges heat with the high-temperature refrigerant vapor in water source heat exchanger 21, then cools down through the heat exchanger outlet, cooling water outlet, water source heat exchanger control valve, and finally enters water source heat exchanger 21 for the next cycle. The refrigerant, after cooling and liquefying, enters the rectifier module.

[0125] 2) Refrigeration System: Higher-temperature chilled water from the room is pumped through the chilled water inlet, heat exchanger inlet, and into the indoor heat exchanger 51. It exchanges heat with the liquid refrigerant flowing inside the heat exchanger, cooling the water. The cooled water then exits through the heat exchanger outlet and chilled water outlet, entering the room for cooling. The liquid refrigerant vaporizes, absorbs heat, and heats up before continuing to the next process. 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.

[0126] The constant pressure water supply system opens the water supply electric valve when the pressure reaches a certain point and closes when the pressure exceeds that point.

[0127] The cooling system and the refrigeration system use the same refrigerant, such as water, ethylene glycol aqueous solution, or calcium chloride aqueous solution.

[0128] Example 3

[0129] Reference Figure 23 Air-cooled ejector cooling mode:

[0130] Refrigerant circulation system: First four-way valve Q1bo and ai terminals are connected; Second four-way valve Q2ob and ai terminals are connected; Third four-way valve Q3ib and ao terminals are connected; Sixth three-way valve T6ao terminal is connected; Seventh three-way valve T7ao terminal is connected; Enthalpy-increasing solenoid valve 42 is closed.

[0131] In the high-pressure refrigerant circuit of the refrigerant circulation, 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, the first valve port o and the second valve port a of the seventh three-way valve T7 of the ejector enthalpy enhancement module, the ejector 31 inlet, the injection port, the gas-liquid separator 32 refrigerant first inlet, the refrigerant first outlet, and the compressor 11 return port.

[0132] In the low-pressure refrigerant circuit of the refrigerant cycle, the refrigerant completes one refrigeration cycle by passing 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.

[0133] Water circulation system:

[0134] 1) Cooling system: The water source heat exchanger control valve is closed, the cooling water pump is closed, and the water source heat exchanger 21 stops working; the fan is turned on, and the air source heat exchanger 22 is working.

[0135] 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.

[0136] 2) Refrigeration System: Higher-temperature chilled water from the room is pumped through the chilled water inlet, heat exchanger inlet, and into the indoor heat exchanger 51. It exchanges heat with the liquid refrigerant flowing inside the heat exchanger, cooling the water. The cooled water then exits through the heat exchanger outlet and chilled water outlet, entering the room for cooling. The liquid refrigerant vaporizes, absorbs heat, and heats up before continuing to the next process. 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.

[0137] The constant pressure water supply system opens the water supply electric valve when the pressure is at a certain point and closes when the pressure is higher than a certain point.

[0138] The cooling system and the refrigeration system use the same refrigerant, such as water, ethylene glycol aqueous solution, or calcium chloride aqueous solution.

[0139] Example 4

[0140] Reference Figure 24 Water-cooled conventional cooling mode:

[0141] Refrigerant circulation system: The first four-way valve Q1ao and bi ends are connected; the second four-way valve Q2ob and ai ends are connected; the third four-way valve Q3oa and bi ends are connected; the sixth three-way valve T6bo end is connected; the seventh three-way valve T7ob end is connected; the enthalpy-increasing solenoid valve 42 is closed.

[0142] Refrigerant circulation path: 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 water source 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 of the rectifier module, the first valve port o and the third valve port b of the seventh three-way valve T7 of the ejector enthalpy enhancement module, the second refrigerant inlet and the second refrigerant outlet of gas-liquid separator 32, 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 and the first refrigerant outlet of gas-liquid separator 32, and the return port of compressor 11.

[0143] Water circulation system:

[0144] 1) Cooling system: The water source heat exchanger control valve is opened, the cooling water pump is turned on, and the water source heat exchanger 21 starts to work; the fan is turned off, and the air source heat exchanger 22 stops working.

[0145] Cooling water (refrigerant) at a lower temperature from the multi-source cooling system is pumped through a cooling water inlet, filter, pump, check valve, and control valve to the water source heat exchanger 21. The low-temperature cooling water exchanges heat with the high-temperature refrigerant vapor in the heat exchanger 21, then flows through the heat exchanger outlet and cooling water outlet to the multi-source cooling system for cooling before starting the next cycle. The refrigerant, after cooling and liquefying, enters the rectifier module.

[0146] 2) Refrigeration System: Higher-temperature chilled water from the room is pumped through the chilled water inlet, heat exchanger inlet, and into the indoor heat exchanger 51. It exchanges heat with the liquid refrigerant flowing inside the heat exchanger, cooling the water. The cooled water then exits through the heat exchanger outlet and chilled water outlet, entering the room for cooling. The liquid refrigerant vaporizes, absorbs heat, and heats up before continuing to the next process. 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.

[0147] Example 5

[0148] Reference Figure 25 Air source heat pump conventional heating mode:

[0149] 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 seventh three-way valve T7ob end is connected; the enthalpy-increasing solenoid valve 42 is closed.

[0150] 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 first valve port o and the third valve port b of the seventh three-way valve T7 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.

[0151] 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 fourth valve port b and the second valve port i of the second four-way valve Q2 of the air source heat exchanger 22, 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 refrigeration cycle.

[0152] Water circulation system:

[0153] 1) Cooling System: The cooling water pump is shut down, the water source heat exchanger control valve is closed, and the water source heat exchanger 21 stops working; the fan starts, and the air source heat exchanger 22 starts working. 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 cooled down and discharged from the unit.

[0154] 2) Refrigeration system:

[0155] Lower-temperature chilled water from indoors is pumped through a Y-type filter, chilled water pump, check valve, indoor heat exchanger control valve, chilled water inlet, and enters 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 process. Higher-temperature chilled water exchanges heat with indoor air, cooling down, and then flows back to indoor heat exchanger 51 to continue absorbing heat, completing one heating cycle.

[0156] The constant pressure water supply system opens the water supply electric valve when the pressure reaches a certain point and closes when the pressure exceeds that point.

[0157] The cooling system and the refrigeration system use the same refrigerant, such as water, ethylene glycol aqueous solution, or calcium chloride aqueous solution.

[0158] Example 6

[0159] Reference Figure 26 Air-cooled heat pump ejector heating mode:

[0160] 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 seventh three-way valve T7ao end is connected; the enthalpy-increasing solenoid valve 42 is closed.

[0161] High-pressure refrigerant circuit of 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 third valve port a of the second three-way valve, 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 first valve port o and the second valve port a of the seventh three-way valve T7 of the ejector enthalpy enhancement module, the air inlet of ejector 31, the injection port, the first refrigerant inlet of gas-liquid separator 32, and the refrigerant vapor through the first refrigerant outlet to the return port of compressor 11.

[0162] Low-pressure refrigerant circuit of refrigerant circulation: Liquid refrigerant flows sequentially through the second refrigerant outlet of gas-liquid separator 32, the first outlet of economizer 41, the first outlet, 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 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 ejector intake port, the injection port, the first refrigerant inlet of gas-liquid separator 32, the first refrigerant outlet, and the return port of compressor 11, completing one cycle.

[0163] 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 through the ejector nozzle of ejector 31. 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.

[0164] The refrigeration cycle system is the same as in Example 5.

[0165] Example 7

[0166] Reference Figure 27 Air-cooled ejector heating mode with increased enthalpy:

[0167] 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 seventh three-way valve T7ao end is connected; the enthalpy-increasing solenoid valve 42 is open.

[0168] The refrigerant circulation path is as follows:

[0169] 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 first valve port o and the second valve port a of the seventh three-way valve T7 of the ejector enthalpy enhancement module. It then splits into two paths: the high-pressure refrigerant flows through the inlet port and injection port of ejector 31, through the first refrigerant inlet of gas-liquid separator 32, and the refrigerant vapor flows through the first refrigerant outlet, returning to the return port of compressor 11. The low-pressure liquid refrigerant flows through the second refrigerant outlet of gas-liquid separator 32 and is further divided into two circuits.

[0170] 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 inlet of the gas-liquid separator 32, the low-pressure vapor is separated and then passes through the first outlet of the refrigerant and the return port of the compressor 11.

[0171] 2) The auxiliary EVI circuit completes the refrigeration cycle through the enthalpy-increasing solenoid valve 42, the enthalpy-increasing expansion valve 43, the second inlet and second outlet of the economizer 41, and the enthalpy-increasing suction port of the compressor 11.

[0172] 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 returns to the compressor 11 through the enthalpy-increasing port, fully recovering heat energy, improving the working environment of the compressor 11, reducing the compression ratio, and increasing working efficiency.

[0173] 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.

[0174] The refrigeration cycle system is the same as in Example 5.

[0175] Example 8

[0176] Reference Figure 28 Air-cooled enthalpy-increasing heating mode:

[0177] Refrigerant circulation system: The first four-way valve Q1ob and ai ends are connected; the second four-way valve Q2ib and ao ends are connected; the third four-way valve Q3ia and bo ends are connected; the sixth three-way valve T6oa end is connected; the seventh three-way valve T7bo end is connected; the enthalpy-increasing solenoid valve 42 is open.

[0178] The refrigerant circulation path is as follows:

[0179] 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 first valve port o and the third valve port b of the seventh three-way valve T7 of the ejector enthalpy enhancement module, the second refrigerant inlet of gas-liquid separator 32, and the low-pressure steam returns to compressor 11 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:

[0180] 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 inlet of the gas-liquid separator 32, the low-pressure vapor is separated and then passes through the first outlet of the refrigerant and the return port of the compressor 11.

[0181] 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.

[0182] The refrigeration cycle system is the same as in Example 5.

[0183] Example 9

[0184] Reference Figure 29 Air-cooled heat pump in standard defrosting mode:

[0185] 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 seventh three-way valve T7bo end is connected; the enthalpy-increasing solenoid valve 42 is closed.

[0186] The refrigerant circulation path is as follows: 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 first valve port o and the third valve port b of the seventh three-way valve T7 of the ejector enthalpy enhancement module, and the second refrigerant inlet of the gas-liquid separator 32. The refrigerant vapor enters the compressor 11 return port through the first refrigerant outlet of the gas-liquid separator 32. The liquid refrigerant completes one defrosting 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 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 compressor 11 return port.

[0187] Water circulation system:

[0188] 1) Cooling system: The water source heat exchanger control valve is closed, the cooling tower control valve is closed, and the cooling water pump is closed. The fan is off, and the air source heat exchanger 22 is in defrosting mode.

[0189] 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.

[0190] Due to space limitations, the above only describes some of the operating modes of the ejector-induced enthalpy-enhancing multi-source hot and cold water pump module unit of this application.

[0191] 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 should be included within the protection scope of the present invention.

Claims

1. A multi-unit chilled and hot water system composed of ejector-induced enthalpy-enhancing multi-source hot and cold water pump modules, 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, a user-side module, and a cold and heat source 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, which are connected to the heat exchanger module of the cold and heat source, and node B, which is connected to the user side module, through a multi-way valve group and pipeline; node C, which is connected to the ejector enthalpy enhancement module, is formed between node A1 and node B through a multi-way valve group 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 group 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 a water source 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 a multi-way valve group 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 group 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 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 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 heat source module includes a cooling water inlet and a cooling water outlet; The water source heat exchanger is connected in series between the cooling water inlet and the cooling water outlet; The cooling water inlet pipeline is equipped with a filter, a cooling water pump, a check valve, and a water source heat exchanger control valve. A multi-source cooling system is connected in parallel to the cooling water inlet and cooling water outlet; 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 group consists of 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 group 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 group is a sixth three-way valve. The water source 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 water source 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 group is a seventh three-way valve, and the air inlet, node I', and refrigerant second inlet are respectively connected to the three valve ports of the seventh three-way valve through pipelines.

2. The multi-unit chilled and hot water pump module unit according to claim 1, characterized in that: In the refrigerant pump push module: The multi-way valve group 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 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. Alternatively, the multi-way valve group 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 chilled and hot water pump module unit according to claim 1, characterized in that: In the rectifier module: The multi-way valve group 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, and 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 group 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 group 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 with them.

4. The multi-unit chilled and hot water pump module unit according to claim 1, characterized in that: In the aforementioned heat exchanger module: The multi-way valve group 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 water source heat exchanger and node F'. The water source 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 chilled and hot water pump module unit according to claim 1, characterized in that: In the ejector enthalpy enhancement module: The multi-way valve group 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 chilled and hot water pump module unit according to claim 1, characterized in that: The economizer is a plate heat exchanger or a flash evaporator.

7. The multi-unit chilled and hot water pump module unit according to claim 1, characterized in that: The multi-source cooling system includes a closed cooling system or an open cooling system.

8. The multi-unit chilled and hot water pump module unit composed of ejector-induced enthalpy-increasing multi-source chilled and hot water pumps as described in claim 1 or 7, characterized in that: The cooling water inlet pipe is also connected to a pressure stabilizing tank, a water supply electric valve, and a water supply pump, forming a constant pressure water supply system.

9. The multi-unit chilled and hot water pump module unit composed of ejector-induced enthalpy-increasing multi-source chilled and hot water pumps as described in claim 1 or 7, characterized in that: The multi-source cooling system also includes a wastewater source heat exchanger and a wastewater 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, which are connected in parallel at the cooling water inlet and cooling water outlet.

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