A multi-cold-source air conditioning system

Abstract

The utility model discloses a kind of multi-cold-source air conditioning systems, including compressor, first heat exchanger, second heat exchanger and third heat exchanger and throttling mechanism;The compressor, the first heat exchanger, the second heat exchanger and the third heat exchanger are connected by pipeline and constitute loop system, the throttling mechanism is arranged on pipeline to control medium flow direction, first embodiment is switched mode by electromagnetic valve opening and closing, second embodiment is switched mode by the opening and closing adjustment of two electronic expansion valves respectively, prior art is switched mode by multiple valve linkage, in general, second embodiment is distinguished from first embodiment, the number of check valve is reduced, and one electronic expansion valve is replaced in first embodiment by one time-limited electronic expansion valve and one solenoid valve, first embodiment is distinguished from prior art, simple structure system fault point is small, second embodiment is distinguished from prior art and reduces flow resistance.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to a multi-cold source air conditioning system. Background Technology

[0002] Multi-source air conditioning systems are advanced air conditioning technologies that integrate multiple cooling sources (such as high / low temperature sources, natural cooling sources combined with mechanical refrigeration, electrical refrigeration combined with absorption refrigeration) to significantly improve energy efficiency, enhance reliability, and improve environmental adaptability. Through cold source coordination and intelligent control, this system transforms from "single-source cooling" to "on-demand cooling," becoming the preferred solution for high-efficiency and high-reliability applications. In the future, with breakthroughs in natural cooling source utilization technologies, its economic viability and applicability will be further enhanced, making it a core pathway for building energy conservation.

[0003] A representative example is patent document CN2020209413778, which discloses a multi-source tri-generation unit and system. When defrosting is required in the air-cooled heat exchange path, the air-cooled heat exchange path can be connected to the compressor's output, allowing the high-temperature, high-pressure refrigerant output from the compressor to directly enter the air-cooled heat exchange path for defrosting. Simultaneously, the valve structure can selectively control at least one of the water-cooled heat exchange path, the evaporative cooling heat exchange path, and the air conditioning water heat exchange path to be connected to the circuit. This allows the high-temperature, high-pressure refrigerant output from the compressor to be delivered to the air conditioning water heat exchange path through other paths, ensuring that the air conditioning water heat exchange path can still output sufficient heating during defrosting. This improves the energy efficiency of the multi-source tri-generation unit and ensures good user comfort.

[0004] The aforementioned patent documents disclose a technical solution utilizing multiple cold sources, but its practical application still has limitations, as follows: First, the technical solution disclosed in the aforementioned patent document is equipped with 5 check valves and 4 switching valves, and different modes of operation are achieved by operating these two types of valves. However, the large number of valves means that the structure is complex and there are many potential failure points. For example, multiple valves need to be operated when switching between liquid cooling and air cooling. If a check valve fails or is misoperated, the use of the equipment will be limited. Secondly, the one-way valve assembly needs to be checked regularly during maintenance. It manages the refrigerant flow through a complex one-way valve assembly, which results in greater limitations on the refrigerant flow, thus indirectly affecting the efficiency of cooling and heating.

[0005] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0006] This utility model provides a multi-source air conditioning system, which aims to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a multi-source air conditioning system, including a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a throttling mechanism; the compressor, the first heat exchanger, the second heat exchanger, and the third heat exchanger are connected by pipelines to form a loop system, and the throttling mechanism is installed on the pipelines to control the flow direction of the medium; the throttling mechanism includes a first throttling mechanism; the multi-source air conditioning system has independently usable air-cooled mode, liquid-cooled mode, and heating mode; the throttling mechanism is configured to connect at least two of the compressor, the first heat exchanger, the second heat exchanger, and the third heat exchanger to the loop system in air-cooled mode, liquid-cooled mode, or heating mode; the first throttling mechanism includes a first four-way valve, a second four-way valve, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, a time-limited electronic expansion valve, and a solenoid valve. In the liquid-cooled mode, the compressor output, first four-way valve, first heat exchanger, first check valve, time-limited electronic expansion valve, second check valve, second heat exchanger, second four-way valve, and compressor input constitute the first refrigeration throttling system to guide the circulation of the medium. In the air-cooled mode, the compressor output, first four-way valve, second four-way valve, third heat exchanger, fourth check valve, time-limited electronic expansion valve, second check valve, second heat exchanger, second four-way valve, and compressor input constitute the second refrigeration throttling system. In the heating mode, the compressor output, first four-way valve, second four-way valve, second heat exchanger, third check valve, time-limited electronic expansion valve, solenoid valve, third heat exchanger, second four-way valve, and compressor input constitute the first heating throttling system. The solenoid valve is configured to open only in heating mode.

[0008] As the first embodiment provided in this application, this multi-source air conditioning system achieves significant optimization through a simplified valve assembly structure. Specifically, it replaces the traditional solution (5 check valves + 4 on / off valves) with a combination of four check valves, one time-limited electronic expansion valve, and one solenoid valve, establishing three independent operating modes: air cooling, liquid cooling, and heating. The key improvement is that each mode requires only the operation of 1-3 valves to precisely control the medium flow direction (for example, when starting the air cooling mode, only the fourth check valve, the time-limited electronic expansion valve, and the second check valve need to be operated). Compared to the complex operation of multiple valves required for mode switching in existing technologies, the new solution reduces the system's potential failure points from 9 valves to 4. This structural approach directly reduces flow resistance losses. Simultaneously, it significantly reduces the risk of mode switching failures due to check valve jamming or misoperation, and particularly solves the equipment lock-up problem caused by the coordinated failure of multiple valves.

[0009] A multi-source air conditioning system includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a throttling mechanism. The compressor, the first heat exchanger, the second heat exchanger, and the third heat exchanger are connected by pipelines to form a loop system. The throttling mechanism is installed on the pipelines to control the flow direction of the medium. The throttling mechanism includes a second throttling mechanism. The multi-source air conditioning system has independently usable air-cooled mode, liquid-cooled mode, and heating mode. The throttling mechanism is configured to connect at least two of the compressor, the first heat exchanger, the second heat exchanger, and the third heat exchanger to the loop system in air-cooled mode, liquid-cooled mode, or heating mode. The second throttling mechanism includes a first four-way valve, a second four-way valve, a first one-way valve, a second one-way valve, a third one-way valve, a first electronic expansion valve, and a second electronic expansion valve. In liquid-cooled mode, the compressor... The compressor output, first four-way valve, first heat exchanger, first one-way valve, first electronic expansion valve, second heat exchanger, second four-way valve, and compressor input constitute the third refrigeration throttling system. In air-cooled mode, the compressor output, first four-way valve, second four-way valve, third heat exchanger, third one-way valve, first electronic expansion valve, second heat exchanger, second four-way valve, and compressor input constitute the fourth refrigeration throttling system. In heating mode, the compressor output, first four-way valve, second four-way valve, second heat exchanger, second one-way valve, second electronic expansion valve, third heat exchanger, second four-way valve, and compressor input constitute the second heating throttling system. In air-cooled and liquid-cooled modes, the second electronic expansion valve is closed and the first electronic expansion valve is open. In heating mode, the first electronic expansion valve is closed and the second electronic expansion valve is open.

[0010] As a second embodiment provided in this application, the multi-source air conditioning system achieves significant optimization through a simplified valve group structure. Specifically, it replaces the traditional solution (5 check valves + 4 on / off valves) with a combination of three one-way valves and two electronic expansion valves, establishing three independent operating modes: air cooling, liquid cooling, and heating. The key improvement is that each mode only requires operating 1-2 valves to accurately control the medium flow direction (for example, only the third check valve and the first electronic expansion valve need to be operated when starting the air cooling mode). Compared to the complex operation of switching modes in the prior art, which requires the linkage of multiple valves, the new solution reduces the system's potential failure points from 9 valves to 4. This structural approach directly reduces flow resistance losses. At the same time, it significantly reduces the risk of mode switching failures caused by check valve jamming or misoperation, and in particular, solves the equipment lock-up problem caused by the coordinated failure of multiple valves.

[0011] The first implementation uses a solenoid valve opening and closing switching mode, while the second implementation uses two electronic expansion valves for separate opening and closing adjustment switching. Existing technologies use multiple valves for linkage switching. In summary, the second implementation differs from the first implementation by reducing the number of check valves and replacing one time-limited electronic expansion valve and one solenoid valve in the first implementation with one electronic expansion valve. The first implementation differs from existing technologies by having a simple structure and fewer system failure points, while the second implementation differs from existing technologies by reducing flow resistance.

[0012] A further technical solution is provided, wherein the first four-way valve has a first inlet, a first outlet, a second outlet, and a third outlet; the second four-way valve has a second inlet, a fourth outlet, a fifth outlet, and a sixth outlet; the pipeline includes a return pipeline, which is composed of a pipe connecting the compressor output end and the first inlet, a pipe connecting the third outlet and the second inlet, and a pipe connecting the fifth outlet and the compressor input end; the end of the second outlet is connected to a connecting branch pipe that is connected to the pipe disposed between the fifth outlet and the compressor input end.

[0013] The above design enables the return pipeline to achieve medium return quickly and effectively.

[0014] A further technical solution, when the first throttling mechanism is installed on the pipeline, the pipeline further includes a liquid-cooled pipeline; the liquid-cooled pipeline includes a first pipe, a second pipe, and a third pipe; one end of the first pipe is connected to a first outlet, and the other end is connected to a first heat exchanger inlet; the second heat exchanger has an inlet, an outlet, and a flow port; one end of the second pipe is connected to the first heat exchanger outlet, and the other end is connected to the second heat exchanger inlet; wherein, along the flow direction of the medium in the second pipe, a first check valve, a time-limiting electronic expansion valve, and a second check valve are sequentially installed on the second pipe, and an angle valve is provided between the first check valve and the time-limiting electronic expansion valve; one end of the third pipe is connected to the second heat exchanger flow port, and the other end is connected to a sixth outlet; when the medium output from the compressor output end exchanges heat with the first and second heat exchangers, the medium introduced into the second four-way valve through the pipe between the fifth outlet and the compressor input end is input into the compressor through the third pipe to form a first liquid-cooled circuit.

[0015] With the above design, in the first embodiment, the medium can be better circulated in the first liquid cooling circuit and exchange heat in the first heat exchanger and the second heat exchanger.

[0016] A further technical solution includes an air-cooled pipeline; the air-cooled pipeline includes a fourth pipe, a fifth pipe, and a sixth pipe; the fourth pipe is the pipe between the third outlet and the second inlet; one end of the fifth pipe is connected to the fourth outlet, and the other end is connected to the first connection port of the third heat exchanger; one end of the sixth pipe is connected to the second connection port of the third heat exchanger, and the other end is connected to the second pipe, with this end positioned between an angle valve and a first check valve; a fourth check valve is installed on the sixth pipe, directing the medium flow towards the angle valve; when the medium is discharged from the compressor, the medium enters the third heat exchanger through the fourth and fifth pipes, then enters the second pipe through the sixth pipe, and after flowing through the time-limited electronic expansion valve and the second check valve, flows into the second heat exchanger for reflux, and through the pipe between the fifth outlet and the compressor input end, the medium flowing out of the second heat exchanger is input into the compressor to form a first air-cooled circuit.

[0017] With the above design, in the first embodiment, the medium can be better circulated in the first air-cooled circuit and exchanged heat in the third heat exchanger.

[0018] A further technical solution includes a first heating pipeline and a time-limiting branch. One end of the time-limiting branch is connected to the second pipeline and is located between the time-limiting electronic expansion valve and the second check valve. The other end is connected to the sixth pipeline and is located between the fourth check valve and the second connection port of the third heat exchanger. The solenoid valve is installed on the time-limiting branch. The first heating pipeline includes a seventh pipeline. One end of the seventh pipeline is connected to the outlet of the second heat exchanger, and the other end is connected to an angle valve. The third check valve is installed on the seventh pipeline. When the medium is discharged from the compressor, the medium enters the second heat exchanger through the fourth and third pipelines, then enters the seventh pipeline through the outlet, and flows back to the third heat exchanger after passing through the time-limiting electronic expansion valve and the solenoid valve on the second pipeline and the time-limiting branch. Then, through the fifth pipeline and the pipeline between the fifth outlet and the compressor input end, the medium output from the third heat exchanger is input into the compressor to form a first heating circuit.

[0019] With the above design, in the first embodiment, the medium can be better circulated in the first heating circuit and exchange heat in the second and third heat exchangers.

[0020] A further technical solution, when the second throttling mechanism is installed on the pipeline, includes a liquid cooling pipeline, which includes a third pipeline, a first pipeline, an eighth pipeline, a pipeline located between the fifth outlet and the compressor input end, and a pipeline connected between the compressor output end and the first inlet; one end of the third pipeline is connected to the flow port of the second heat exchanger, and the other end is connected to the sixth outlet; one end of the first pipeline is connected to the first outlet, and the other end is connected to the first heat exchanger inlet; one end of the eighth pipeline is connected to the outlet of the first heat exchanger, and the other end is connected to the inlet of the second heat exchanger; along the medium flow direction, the first check valve and the first electronic expansion valve are sequentially installed on the eighth pipeline, and an angle valve is installed between the first check valve and the first electronic expansion valve; when the medium output from the compressor output end completes heat exchange in the first and second heat exchangers through the first and eighth pipelines, the medium introduced into the second four-way valve through the pipeline between the fifth outlet and the compressor input end is input into the compressor to form a second liquid cooling circuit.

[0021] With the above design, in the second embodiment, the medium can be better circulated in the second liquid cooling circuit and exchange heat in the first and second heat exchangers.

[0022] A further technical solution includes a cooling pipeline comprising a ninth pipe, a fifth pipe, a fourth pipe, and a third pipe. The fourth pipe connects the third outlet to the second inlet. One end of the third pipe is connected to the flow port of the second heat exchanger, and the other end is connected to the sixth outlet. One end of the fifth pipe is connected to the fourth outlet, and the other end is connected to the first connection port of the third heat exchanger. One end of the ninth pipe is connected to the second connection port of the third heat exchanger, and the other end is connected to the eighth pipe and located between the first check valve and the angle valve. The third check valve is installed on the ninth pipe to allow the medium to flow from the third heat exchanger through the ninth pipe, through the first electronic expansion valve, to the inlet of the second heat exchanger. When the medium is discharged from the compressor, the medium enters the third heat exchanger through the fourth and fifth pipes, then enters the eighth pipe through the ninth pipe, and enters the second heat exchanger for heat exchange. Then, through the pipe located between the fifth outlet and the compressor inlet, the medium delivered from the second heat exchanger to the second four-way valve is transferred to the compressor to form a second air-cooled circuit.

[0023] With the above design, in the second embodiment, the medium can be better circulated in the second air-cooled circuit and exchange heat in the third heat exchanger and the second heat exchanger.

[0024] A further technical solution includes a second heating pipeline, which includes a tenth pipeline and an eleventh pipeline. One end of the tenth pipeline is connected between the second connecting port of the third heat exchanger and the third check valve, and the other end is connected between the angle valve and the first electronic expansion valve. One end of the eleventh pipeline is connected to the outlet of the second heat exchanger, and the other end is connected to the angle valve. A second check valve is installed between the outlet of the second heat exchanger and the angle valve. When the medium is discharged from the compressor, the medium is input into the second heat exchanger through the fourth pipeline and the third pipeline, and then flows back to the third heat exchanger through the ninth pipeline, the tenth pipeline, the eighth pipeline and the eleventh pipeline in sequence. The medium delivered to the second four-way valve by the third heat exchanger is transferred to the compressor through the pipeline installed between the fifth outlet and the compressor input end to form a second heating circuit.

[0025] With the above design, in the second embodiment, the medium can be better circulated in the second heating circuit and exchange heat in the second and third heat exchangers.

[0026] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0027] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0028] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0029] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0030] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0031] The working principle and advantages of this utility model are as follows: In the first implementation, this multi-source air conditioning system achieves significant optimization through a simplified valve assembly structure. Specifically, it replaces the traditional solution (5 check valves + 4 on / off valves) with a combination of four check valves, one time-limited electronic expansion valve, and one solenoid valve, establishing three independent operating modes: air cooling, liquid cooling, and heating. The key improvement is that each mode requires only 1-3 valves to precisely control the medium flow direction (e.g., when starting the air cooling mode, only the fourth check valve, the time-limited electronic expansion valve, and the second check valve need to be operated). Compared to the complex operation of multiple valves required for mode switching in existing technologies, the new solution reduces the system's potential failure points from nine valves to four. This structural approach directly reduces flow resistance losses. Simultaneously, it significantly reduces the risk of mode switching failures due to check valve jamming or misoperation, and particularly solves the equipment lock-up problem caused by the coordinated failure of multiple valves.

[0032] The second implementation significantly optimizes the multi-source air conditioning system by simplifying the valve assembly structure. Specifically, it replaces the traditional solution (5 check valves + 4 on / off valves) with a combination of three check valves and two electronic expansion valves, establishing three independent operating modes: air cooling, liquid cooling, and heating. The key improvement is that each mode requires only 1-2 valves to precisely control the medium flow direction (e.g., only the third check valve and the first electronic expansion valve need to be operated when starting the air cooling mode). Compared to the complex operation of multiple valves required for mode switching in existing technologies, the new solution reduces the number of potential failure points from nine valves to four. This structural approach directly reduces flow resistance losses. Simultaneously, it significantly reduces the risk of mode switching failures due to check valve jamming or misoperation, and particularly solves the equipment lock-up problem caused by the coordinated failure of multiple valves.

[0033] The first implementation uses a solenoid valve opening and closing switching mode, while the second implementation uses two electronic expansion valves for separate opening and closing adjustment switching. Existing technologies use multiple valves for linkage switching. In summary, the second implementation differs from the first implementation by reducing the number of check valves and replacing one time-limited electronic expansion valve and one solenoid valve in the first implementation with one electronic expansion valve. The first implementation differs from existing technologies by having a simple structure and fewer system failure points, while the second implementation differs from existing technologies by reducing flow resistance.

[0034] Furthermore, unlike existing technologies, this application can also: This application is primarily applicable to areas with abundant rainfall in summer and dry or frozen winters. In air-cooled mode, it can provide hot water to customers in winter; in water-cooled mode, it can provide chilled water to customers in summer. Its overall energy consumption performance is significantly better than air-cooled heat pump systems, thus further expanding the application range of water-cooled modes in cold or large temperature-varying regions.

[0035] Secondly, the cooling water circulation systems of current water-cooled chiller units suffer from four major problems: corrosion, scaling, algae and bacteria growth, and sludge accumulation. Without water treatment, these issues will damage the system and significantly reduce heat exchange efficiency. Therefore, shutdown is typically required for corrosion inhibition, scale inhibition, and sterilization / algae removal treatments. For customers whose cooling water demand cannot be interrupted, a backup chiller unit is often necessary. This application addresses this by providing chilled water through an air-cooled system during cooling water system maintenance, enabling maintenance without shutdown and effectively reducing customer investment costs. Attached Figure Description

[0036] Appendix Figure 1 This is a schematic diagram of the overall structure in the first embodiment of the present invention; Appendix Figure 2 This is a schematic diagram of the liquid cooling pipeline structure in the first embodiment of the present invention; Appendix Figure 3 This is a schematic diagram of the air-cooled pipeline structure in the first embodiment of this utility model; Appendix Figure 4 This is a schematic diagram of the first heating pipeline structure in the first embodiment of this utility model; Appendix Figure 5 This is a schematic diagram of the overall structure in the second embodiment of the present invention; Appendix Figure 6 This is a schematic diagram of the liquid cooling pipeline structure in the second embodiment of the present invention; Appendix Figure 7 This is a schematic diagram of the air-cooled pipeline structure in the second embodiment of this utility model; Appendix Figure 8 This is a schematic diagram of the second heating pipeline structure in the second embodiment of this utility model.

[0037] In the attached diagrams: 1. Compressor; 2. First heat exchanger; 3. Second heat exchanger; 4. Third heat exchanger; 5. First throttling mechanism; 6. First four-way valve; 7. Second four-way valve; 8. First check valve; 9. Second check valve; 10. Third check valve; 11. Fourth check valve; 12. Time-limited electronic expansion valve; 13. Solenoid valve; 14. First electronic expansion valve; 15. Second electronic expansion valve; 16. Return line; 17. Connecting branch line; 18. Liquid cooling line; 19. First pipe; 20. Second pipe; 21. 22. Third pipe; 23. Inlet; 24. Outlet; 25. Flow port; 26. Angle valve; 27. Time-limited branch; 28. Air-cooled pipe; 29. ​​Fourth pipe; 30. Fifth pipe; 31. Sixth pipe; 32. First heating pipe; 33. Seventh pipe; 34. Liquid cooling pipe; 35. Eighth pipe; 36. Air-cooled pipe; 37. Second heating pipe; 38. Tenth pipe; 39. Eleventh pipe; 40. First connecting port; 41. Second connecting port; 42. Second throttling mechanism; D1, First Entrance; C1, First Exit; S1, Second Exit; E1, Third Exit; D2, Second Entrance; C2, Fourth Exit; S2, Fifth Exit; E2, Sixth Exit. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0039] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0040] See appendix Figures 1-8 As shown, a multi-source air conditioning system includes a compressor 1, a first heat exchanger 2, a second heat exchanger 3, and a third heat exchanger 4, and a throttling mechanism. The compressor 1, the first heat exchanger 2, the second heat exchanger 3, and the third heat exchanger 4 are connected by pipelines to form a loop system. The throttling mechanism is installed on the pipelines to control the flow direction of the medium. The throttling mechanism includes a first throttling mechanism 5. The multi-source air conditioning system has independently usable air-cooled mode, liquid-cooled mode, and heating mode. The throttling mechanism is configured to connect at least two of the compressor 1, the first heat exchanger 2, the second heat exchanger 3, and the third heat exchanger 4 to the loop system in air-cooled mode, liquid-cooled mode, or heating mode. The first throttling mechanism 5 includes a first four-way valve 6, a second four-way valve 7, a first one-way valve 8, a second one-way valve 9, a third one-way valve 10, a fourth one-way valve 11, a time-limited electronic expansion valve 12, and a solenoid valve 13. In the loop system of liquid-cooled mode, the compressor 1, the first heat exchanger 2, the second heat exchanger 3, and the third heat exchanger 4 are connected by pipelines to form a loop system. The first throttling mechanism 5 includes a first four-way valve 6, a second four-way valve 7, a first one-way valve 8, a second one-way valve 9, a third one-way valve 10, a fourth one-way valve 11, a time-limited electronic expansion valve 12, and a solenoid valve 13. The compressor 1 output, first four-way valve 6, first heat exchanger 2, first one-way valve 8, time-limited electronic expansion valve 12, second one-way valve 9, second heat exchanger 3, second four-way valve 7, and compressor 1 input constitute a first refrigeration throttling system to guide the circulation of the medium. In the air-cooled mode, the compressor 1 output, first four-way valve 6, second four-way valve 7, third heat exchanger 4, fourth one-way valve 11, time-limited electronic expansion valve 12, second one-way valve 9, second heat exchanger 3, second four-way valve 7, and compressor 1 input constitute a second refrigeration throttling system. In the heating mode, the compressor 1 output, first four-way valve 6, second four-way valve 7, second heat exchanger 3, third one-way valve 10, time-limited electronic expansion valve 12, solenoid valve 13, third heat exchanger 4, second four-way valve 7, and compressor 1 input constitute a first heating throttling system. The solenoid valve 13 is configured to open only in heating mode.

[0041] As the first embodiment provided in this application, this multi-source air conditioning system achieves significant optimization through a simplified valve assembly structure. Specifically, it replaces the traditional solution (5 check valves + 4 on / off valves) with a combination of four check valves, one time-limited electronic expansion valve 12, and one solenoid valve 13, establishing three independent operating modes: air cooling, liquid cooling, and heating. The key improvement is that each mode only requires the operation of 1-3 valves to accurately control the flow direction of the medium (for example, when starting the air cooling mode, only the fourth check valve 11, the time-limited electronic expansion valve 12, and the second check valve 9 need to be activated). Compared to the complex operation of switching modes in the prior art, which requires the linkage of multiple valves, the new solution reduces the system's potential failure points from 9 valves to 4. This structural approach directly reduces flow resistance losses. At the same time, it significantly reduces the risk of mode switching failures caused by check valve jamming or misoperation, and in particular, solves the equipment lock-up problem caused by the coordinated failure of multiple valves.

[0042] A multi-source air conditioning system includes a compressor 1, a first heat exchanger 2, a second heat exchanger 3, a third heat exchanger 4, and a throttling mechanism. The compressor 1, the first heat exchanger 2, the second heat exchanger 3, and the third heat exchanger 4 are connected by pipelines to form a loop system. The throttling mechanism is installed on the pipelines to control the flow direction of the medium. The throttling mechanism includes a second throttling mechanism 42. The multi-source air conditioning system has independently usable air-cooled mode, liquid-cooled mode, and heating mode. The throttling mechanism is configured to connect at least two of the compressor 1, the first heat exchanger 2, the second heat exchanger 3, and the third heat exchanger 4 to the loop system in air-cooled mode, liquid-cooled mode, or heating mode. The second throttling mechanism 42 includes a first four-way valve 6, a second four-way valve 7, a first one-way valve 8, a second one-way valve 9, a third one-way valve 10, a first electronic expansion valve 14, and a second electronic expansion valve 15. In liquid-cooled mode, the compressor 1 output... The first four-way valve 6, the first heat exchanger 2, the first one-way valve 8, the first electronic expansion valve 14, the second heat exchanger 3, the second four-way valve 7, and the input end of the compressor 1 constitute the third refrigeration throttling system. In air-cooled mode, the output end of the compressor 1, the first four-way valve 6, the second four-way valve 7, the third heat exchanger 4, the third one-way valve 10, the first electronic expansion valve 14, the second heat exchanger 3, the second four-way valve 7, and the input end of the compressor 1 constitute the fourth refrigeration throttling system. In heating mode, the output end of the compressor 1, the first four-way valve 6, the second four-way valve 7, the second heat exchanger 3, the second one-way valve 9, the second electronic expansion valve 15, the third heat exchanger 4, the second four-way valve 7, and the input end of the compressor 1 constitute the second heating throttling system. Specifically, in air-cooled and liquid-cooled modes, the second electronic expansion valve 15 is closed and the first electronic expansion valve 14 is open; in heating mode, the first electronic expansion valve 14 is closed and the second electronic expansion valve 15 is open.

[0043] As a second embodiment provided in this application, the multi-source air conditioning system achieves significant optimization through a simplified valve group structure. Specifically, it replaces the traditional solution (5 check valves + 4 on / off valves) with a combination of three check valves and two electronic expansion valves, establishing three independent operating modes: air cooling, liquid cooling, and heating. The key improvement is that each mode only requires the operation of 1-2 valves to accurately control the flow direction of the medium (for example, when starting the air cooling mode, only the third check valve 10 and the first electronic expansion valve 14 need to be activated). Compared to the complex operation of switching modes in the prior art, which requires the linkage of multiple valves, the new solution reduces the system's potential failure points from 9 valves to 4. This structural approach directly reduces flow resistance losses. At the same time, it significantly reduces the risk of mode switching failures caused by check valve jamming or misoperation, and in particular, solves the equipment lock-up problem caused by the coordinated failure of multiple valves.

[0044] The first implementation uses a solenoid valve 13 to switch between opening and closing modes, while the second implementation uses two electronic expansion valves to switch between opening and closing modes. Existing technologies use multiple valves in a linked switching mode. In summary, the second implementation differs from the first implementation by reducing the number of check valves and replacing one time-limited electronic expansion valve 12 and one solenoid valve 13 in the first implementation with one electronic expansion valve. The first implementation differs from existing technologies by having a simple structure and fewer system failure points, while the second implementation differs from existing technologies by reducing flow resistance.

[0045] Preferably, the first four-way valve 6 has a first inlet D1, a first outlet C1, a second outlet S1, and a third outlet E1; the second four-way valve 7 has a second inlet D2, a fourth outlet C2, a fifth outlet S2, and a sixth outlet E2; the pipeline includes a return pipeline 16, which is composed of a pipe connecting the output end of the compressor 1 and the first inlet D1, a pipe connecting the third outlet E1 and the second inlet D2, and a pipe connecting the fifth outlet S2 and the input end of the compressor 1; the end of the second outlet S1 is connected to a connecting branch pipe 17 that is connected to the pipe disposed between the fifth outlet S2 and the input end of the compressor 1.

[0046] With the above design, the return line 16 can achieve medium return quickly and better.

[0047] Preferably, when the first throttling mechanism 5 is installed on the pipeline, the pipeline further includes a liquid-cooled pipeline 18; the liquid-cooled pipeline 18 includes a first pipe 19, a second pipe 20, and a third pipe 21; one end of the first pipe 19 is connected to the first outlet C1, and the other end is connected to the inlet 22 of the first heat exchanger 2; the second heat exchanger 3 has an inlet 22, an outlet 23, and a flow port 24; one end of the second pipe 20 is connected to the outlet 23 of the first heat exchanger 2, and the other end is connected to the inlet 22 of the second heat exchanger 3; wherein, along the flow direction of the medium in the second pipe 20, A first check valve 8, a time-limiting electronic expansion valve 12, and a second check valve 9 are sequentially arranged on the second pipeline 20, and an angle valve 25 is provided between the first check valve 8 and the time-limiting electronic expansion valve 12; one end of the third pipeline 21 is connected to the flow port 24 of the second heat exchanger 3, and the other end is connected to the sixth outlet E2; when the medium output from the output end of the compressor 1 is heat-exchanged through the first heat exchanger 2 and the second heat exchanger 3, the medium in the third pipeline 21 is fed into the second four-way valve 7 through the pipeline between the fifth outlet S2 and the input end of the compressor 1 to form a first liquid cooling circuit.

[0048] With the above design, in the first embodiment, the medium can be better circulated in the first liquid cooling circuit and exchange heat in the first heat exchanger 2 and the second heat exchanger 3.

[0049] Preferably, the pipeline includes an air-cooled pipeline 27; the air-cooled pipeline 27 includes a fourth pipeline 28, a fifth pipeline 29, and a sixth pipeline 30; the fourth pipeline 28 is the pipeline between the third outlet E1 and the second inlet D2; one end of the fifth pipeline 29 is connected to the fourth outlet C2, and the other end is connected to the first connecting port 40 of the third heat exchanger 4; one end of the sixth pipeline 30 is connected to the second connecting port 41 of the third heat exchanger 4, and the other end is connected to the second pipeline 20, with this end located between the angle valve 25 and the first one-way valve 8; a fourth one-way valve 11 is provided on the sixth pipeline 30, and the medium flows to the angle valve 25; When the medium is discharged from the compressor, it enters the third heat exchanger 4 through the fourth pipe 28 and the fifth pipe 29, then enters the second pipe 20 through the sixth pipe 30, and after flowing through the time-limited electronic expansion valve 12 and the second check valve 9, it flows into the second heat exchanger 3 for reflux. The medium flowing out of the second heat exchanger 3 is then input into the compressor 1 through the pipe between the fifth outlet S2 and the input end of the compressor 1 to form a first air-cooled circuit.

[0050] With the above design, in the first embodiment, the medium can be better circulated in the first air-cooled circuit and exchanged for heat in the third heat exchanger 4.

[0051] Preferably, the pipeline includes a first heating pipeline 31 and a time-limiting branch 26. One end of the time-limiting branch 26 is connected to the second pipeline 20 and is located between the time-limiting electronic expansion valve 12 and the second one-way valve 9. The other end is connected to the sixth pipeline 30 and is located between the fourth one-way valve 11 and the second connection port 41 of the third heat exchanger 4. The solenoid valve 13 is disposed on the time-limiting branch 26. The first heating pipeline 31 includes a seventh pipeline 32. One end of the seventh pipeline 32 is connected to the outlet 23 of the second heat exchanger 3, and the other end is connected to the angle valve 25. The medium is connected to the compressor, and the third check valve 10 is installed on the seventh pipe 32. When the medium is discharged from the compressor, the medium enters the second heat exchanger 3 through the fourth pipe 28 and the third pipe 21, and then enters the seventh pipe 32 through the outlet 23. After passing through the second pipe 20 and the time-limiting electronic expansion valve 12 and solenoid valve 13 on the time-limiting branch 26, it flows back to the third heat exchanger 4. Then, through the fifth pipe 29 and the pipe between the fifth outlet S2 and the input end of the compressor 1, the medium output from the third heat exchanger 4 is input into the compressor 1 to form a first heating circuit.

[0052] With the above design, in the first embodiment, the medium can be better circulated in the first heating circuit and exchanged heat in the second heat exchanger 3 and the third heat exchanger 4.

[0053] Preferably, when the second throttling mechanism 42 is installed on the pipeline, the pipeline includes a liquid refrigeration pipeline 33, which includes a third pipeline 21, a first pipeline 19, an eighth pipeline 34, a pipeline located between the fifth outlet S2 and the input end of the compressor 1, and a pipeline connecting the output end of the compressor 1 and the first inlet D1; one end of the third pipeline 21 is connected to the flow port 24 of the second heat exchanger 3, and the other end is connected to the sixth outlet E2; one end of the first pipeline 19 is connected to the first outlet C1, and the other end is connected to the connection port 22 of the first heat exchanger 2; one end of the eighth pipeline 34 is connected to the first outlet C1, and the other end is connected to the connection port 22 of the first heat exchanger 2; one end of the eighth pipeline 34 is connected to the first outlet C1, and the other end is connected to the connection port 22 of the first heat exchanger 2. Heat exchanger 2 is connected to outlet 23 at one end and to inlet 22 of second heat exchanger 3 at the other end. Along the direction of medium flow, the first check valve 8 and the first electronic expansion valve 14 are sequentially arranged in the eighth pipe 34, and an angle valve 25 is arranged between the first check valve 8 and the first electronic expansion valve 14. After the medium output from the output end of compressor 1 completes heat exchange in the first heat exchanger 2 and the second heat exchanger 3 through the first pipe 19 and the eighth pipe 34, the medium in the third pipe 21 is introduced into the second four-way valve 7 through the pipe between the fifth outlet S2 and the input end of compressor 1 to form a second liquid cooling circuit.

[0054] With the above design, in the second embodiment, the medium can be better circulated in the second liquid cooling circuit and exchange heat in the first heat exchanger 2 and the second heat exchanger 3.

[0055] Preferably, the piping includes a wind-cooled piping 35, which includes a ninth pipe 36, a fifth pipe 29, a fourth pipe 28, and a third pipe 21; the fourth pipe 28 is a pipe connecting the third outlet E1 and the second inlet D2; one end of the third pipe 21 is connected to the flow port 24 of the second heat exchanger 3, and the other end is connected to the sixth outlet E2; one end of the fifth pipe 29 is connected to the fourth outlet C2, and the other end is connected to the first connecting port 40 of the third heat exchanger 4; one end of the ninth pipe 36 is connected to the second connecting port 41 of the third heat exchanger 4, and the other end is connected to the eighth pipe 34 and located at... Between the first check valve 8 and the angle valve 25, the third check valve 10 is installed on the ninth pipe 36 so that the medium flows from the third heat exchanger 4 through the ninth pipe 36, through the first electronic expansion valve 14, to the inlet 22 of the second heat exchanger 3; when the medium is discharged from the compressor 1, the medium enters the third heat exchanger 4 through the fourth pipe 28 and the fifth pipe 29, then enters the eighth pipe 34 through the ninth pipe 36, and enters the second heat exchanger 3 for heat exchange. Then, through the pipe set between the fifth outlet S2 and the input end of the compressor 1, the medium delivered by the second heat exchanger 3 to the second four-way valve 7 is transferred to the compressor 1 to form the second air-cooled circuit.

[0056] With the above design, in the second embodiment, the medium can be better circulated in the second air-cooled circuit and exchange heat in the third heat exchanger 4 and the second heat exchanger 3.

[0057] Preferably, the pipeline includes a second heating pipeline 37, which includes a tenth pipeline 38 and an eleventh pipeline 39. One end of the tenth pipeline 38 is connected between the second connecting port 41 of the third heat exchanger 4 and the third one-way valve 10, and the other end is connected between the angle valve 25 and the first electronic expansion valve 14. One end of the eleventh pipeline 39 is connected to the outlet 23 of the second heat exchanger 3, and the other end is connected to the angle valve 25. A second one-way valve 9 is provided between the outlet 23 of the second heat exchanger 3 and the angle valve 25. When the medium is discharged from the compressor 1, the medium is input into the second heat exchanger 3 through the fourth pipeline 28 and the third pipeline 21, and then flows back to the third heat exchanger 4 through the ninth pipeline 36, the tenth pipeline 38, the eighth pipeline 34 and the eleventh pipeline 39 in sequence. The medium delivered by the third heat exchanger 4 to the second four-way valve 7 is transferred to the compressor 1 through the pipeline provided between the fifth outlet S2 and the input end of the compressor 1 to form a second heating circuit.

[0058] With the above design, in the second embodiment, the medium can be better circulated in the second heating circuit and exchange heat in the second heat exchanger 3 and the third heat exchanger 4.

[0059] It should be noted that the exchange medium for the first heat exchanger 2 is cooling water, i.e., cooling water outlet and cooling water inlet; while the exchange medium for the second heat exchanger 3 is chilled water, i.e., chilled water outlet and chilled water inlet (the inlet and outlet positions of the exchange medium can be found by referring to...). Figure 1 and Figure 5 (The location indicated by the black arrow in the image).

[0060] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multi-source air conditioning system, characterized in that: It includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a throttling mechanism; The compressor, the first heat exchanger, the second heat exchanger, and the third heat exchanger are connected by pipelines to form a loop system. A throttling mechanism is installed on the pipeline to control the flow direction of the medium. The throttling mechanism includes a first throttling mechanism; Multi-source air conditioning systems have independently usable air-cooled mode, liquid-cooled mode, and heating mode; The throttling mechanism is configured to connect at least two of the compressor, the first heat exchanger, the second heat exchanger, and the third heat exchanger to the loop system in air-cooled mode, liquid-cooled mode, or heating mode. The first throttling mechanism includes a first four-way valve, a second four-way valve, a first check valve, a second check valve, a third check valve, a fourth check valve, a time-limited electronic expansion valve, and a solenoid valve; In the liquid-cooled loop system, the compressor output, the first four-way valve, the first heat exchanger, the first check valve, the time-limited electronic expansion valve, the second check valve, the second heat exchanger, the second four-way valve, and the compressor input constitute the first refrigeration throttling system, which is used to guide the circulation of the medium. In the air-cooled mode loop system, the compressor output, the first four-way valve, the second four-way valve, the third heat exchanger, the fourth check valve, the time-limited electronic expansion valve, the second check valve, the second heat exchanger, the second four-way valve, and the compressor input constitute the second refrigeration throttling system. In the circuit system under heating mode, the compressor output end, the first four-way valve, the second four-way valve, the second heat exchanger, the third check valve, the time-limited electronic expansion valve, the solenoid valve, the third heat exchanger, the second four-way valve, and the compressor input end constitute the first heating throttling system. The solenoid valve is configured to open only in heating mode.

2. A multi-source air conditioning system, characterized in that: It includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a throttling mechanism; The compressor, the first heat exchanger, the second heat exchanger, and the third heat exchanger are connected by pipelines to form a loop system. A throttling mechanism is installed on the pipeline to control the flow direction of the medium. The throttling mechanism includes a second throttling mechanism; Multi-source air conditioning systems have independently usable air-cooled mode, liquid-cooled mode, and heating mode; The throttling mechanism is configured to connect at least two of the compressor, the first heat exchanger, the second heat exchanger, and the third heat exchanger to the loop system in air-cooled mode, liquid-cooled mode, or heating mode. The second throttling mechanism includes a first four-way valve, a second four-way valve, a first check valve, a second check valve, a third check valve, a first electronic expansion valve, and a second electronic expansion valve; In liquid cooling mode, the compressor output, the first four-way valve, the first heat exchanger, the first check valve, the first electronic expansion valve, the second heat exchanger, the second four-way valve, and the compressor input constitute the third refrigeration throttling system. In air-cooled mode, the compressor output, the first four-way valve, the second four-way valve, the third heat exchanger, the third check valve, the first electronic expansion valve, the second heat exchanger, the second four-way valve, and the compressor input constitute the fourth refrigeration throttling system. In heating mode, the compressor output end, the first four-way valve, the second four-way valve, the second heat exchanger, the second check valve, the second electronic expansion valve, the third heat exchanger, the second four-way valve, and the compressor input end constitute the second heating throttling system; In both air-cooled and liquid-cooled modes, the second electronic expansion valve is closed and the first electronic expansion valve is open. In heating mode, the first electronic expansion valve is closed and the second electronic expansion valve is open.

3. The multi-source air conditioning system according to claim 1 or 2, characterized in that: The first four-way valve has a first inlet, a first outlet, a second outlet, and a third outlet; The second four-way valve has a second inlet, a fourth outlet, a fifth outlet, and a sixth outlet; The pipeline includes a return pipeline, which consists of a pipe connecting the compressor output end and the first inlet, a pipe connecting the third outlet and the second inlet, and a pipe connecting the fifth outlet and the compressor input end. The end of the second outlet is connected to a connecting branch pipe that is connected to a pipe located between the fifth outlet and the compressor input.

4. The multi-source air conditioning system according to claim 3, characterized in that: When the first throttling mechanism is installed on the pipeline, the pipeline also includes liquid cooling pipeline; The liquid cooling pipeline includes a first pipe, a second pipe, and a third pipe; One end of the first pipe is connected to the first outlet, and the other end is connected to the first heat exchanger inlet; The second heat exchanger has an inlet, an outlet, and a flow port; One end of the second pipe is connected to the outlet of the first heat exchanger, and the other end is connected to the inlet of the second heat exchanger; Along the flow direction of the medium in the second pipeline, a first check valve, a time-limited electronic expansion valve, and a second check valve are sequentially installed on the second pipeline, and an angle valve is provided between the first check valve and the time-limited electronic expansion valve. One end of the third pipe is connected to the flow port of the second heat exchanger, and the other end is connected to the sixth outlet. When the medium output from the compressor output end exchanges heat with the first and second heat exchangers, it is fed into the compressor through the pipe between the fifth outlet and the compressor input end. The medium in the third pipe is then fed into the second four-way valve to form a first liquid cooling circuit.

5. The multi-source air conditioning system according to claim 4, characterized in that: Piping includes air-cooled piping; The air-cooled piping system includes the fourth, fifth, and sixth pipes; The fourth pipe is the pipe between the third outlet and the second inlet. One end of the fifth pipe is connected to the fourth outlet, and the other end is connected to the first connection port of the third heat exchanger. One end of the sixth pipe is connected to the second connection port of the third heat exchanger, and the other end is connected to the second pipe, with this end located between the angle valve and the first check valve. The sixth pipeline is equipped with a fourth check valve, which directs the medium to the angle valve; When the medium is discharged from the compressor, it enters the third heat exchanger through the fourth and fifth pipes, then enters the second pipe through the sixth pipe, and after flowing through the time-limited electronic expansion valve and the second check valve, it flows into the second heat exchanger for reflux. Then, through the pipe between the fifth outlet and the compressor input end, the medium flowing out of the second heat exchanger is input into the compressor to form a first air-cooled circuit.

6. The multi-source air conditioning system according to claim 5, characterized in that: The pipeline includes a first heating pipeline and a time-limited branch. One end of the time-limited branch is connected to the second pipeline and is located between the time-limited electronic expansion valve and the second check valve. The other end is connected to the sixth pipeline and is located between the fourth check valve and the second connection port of the third heat exchanger. The solenoid valve is installed on the time-limited branch; The first heating pipeline includes the seventh pipeline; One end of the seventh pipe is connected to the outlet of the second heat exchanger, and the other end is connected to an angle valve. A third check valve is also installed on the seventh pipe. When the medium is discharged from the compressor, it enters the second heat exchanger through the fourth and third pipes, then enters the seventh pipe through the outlet, and then flows back to the third heat exchanger through the second pipe and the time-limited electronic expansion valve and solenoid valve on the time-limited branch. Finally, it enters the compressor through the fifth pipe and the pipe between the fifth outlet and the compressor input end to form a first heating circuit.

7. The multi-source air conditioning system according to claim 3, characterized in that: When the second throttling mechanism is installed on the pipeline, the pipeline includes a liquid refrigeration pipeline, which includes a third pipeline, a first pipeline, and an eighth pipeline. One end of the third pipe is connected to the flow port of the second heat exchanger, and the other end is connected to the sixth outlet. One end of the first pipe is connected to the first outlet, and the other end is connected to the first heat exchanger inlet; One end of the eighth pipe is connected to the outlet of the first heat exchanger, and the other end is connected to the inlet of the second heat exchanger. Along the direction of medium flow, the first check valve and the first electronic expansion valve are sequentially arranged in the eighth pipeline, and an angle valve is arranged between the first check valve and the first electronic expansion valve. After the medium output from the compressor has completed heat exchange in the first and second heat exchangers through the first and eighth pipes, it is fed into the compressor through the third pipe via the pipe between the fifth outlet and the compressor input to form a second liquid cooling circuit.

8. The multi-source air conditioning system according to claim 7, characterized in that: The piping system includes air-cooled piping, which includes the ninth pipe, the fifth pipe, the fourth pipe, and the third pipe. The fourth pipe is the pipe connecting the third outlet and the second inlet; One end of the third pipe is connected to the flow port of the second heat exchanger, and the other end is connected to the sixth outlet. One end of the fifth pipe is connected to the fourth outlet, and the other end is connected to the first connection port of the third heat exchanger. One end of the ninth pipe is connected to the second connection port of the third heat exchanger, and the other end is connected to the eighth pipe and located between the first check valve and the angle valve. A third check valve is installed on the ninth pipe so that the medium flows from the third heat exchanger through the ninth pipe, through the first electronic expansion valve, to the inlet of the second heat exchanger. When the medium is discharged from the compressor, it enters the third heat exchanger through the fourth and fifth pipes, then enters the eighth pipe through the ninth pipe, and enters the second heat exchanger for heat exchange. Then, through the pipe set between the fifth outlet and the compressor input end, the medium delivered by the second heat exchanger to the second four-way valve is transferred to the compressor to form a second air-cooled circuit.

9. The multi-source air conditioning system according to claim 8, characterized in that: The pipeline includes a second heating pipeline, which includes a tenth pipeline and an eleventh pipeline; One end of the tenth pipe is connected between the second connecting port of the third heat exchanger and the third check valve, and the other end is connected between the angle valve and the first electronic expansion valve; One end of the eleventh pipe is connected to the outlet of the second heat exchanger, and the other end is connected to the angle valve. A second check valve is installed between the outlet of the second heat exchanger and the angle valve. When the medium is discharged from the compressor, it enters the second heat exchanger through the fourth and third pipes, and then flows back to the third heat exchanger through the ninth, tenth, eighth and eleventh pipes in sequence. The medium delivered from the third heat exchanger to the second four-way valve is then transferred to the compressor through the pipe located between the fifth outlet and the compressor input end to form the second heating circuit.

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