A multi-air flow path cooling domestic split type air conditioning system

Abstract

The application provides a multi-air-flow-path cooling household split air conditioning system, which comprises an evaporative cooling system, an underground shallow well heat exchange system and a household split air conditioning system; the evaporative cooling system comprises an evaporative cooling tank; the air after heat exchange of the evaporative cooling tank flows to the underground shallow well heat exchange system and / or the household split air conditioning system; the underground shallow well heat exchange system comprises a shallow well, and a heat exchange device is arranged in the shallow well; the outlet end of the heat exchange device is communicated with the household split air conditioning system; the air inlet side of the indoor unit of the household split air conditioning system is communicated with an indoor unit air inlet main pipe; the indoor unit air inlet main pipe is communicated with the evaporative cooling system and the underground shallow well heat exchange system through an air outlet branch pipe I and an air outlet main pipe respectively. The application realizes the following effects: the air in the controlled environment space is subjected to hierarchical regulation, the indoor unit is communicated with heat exchange air of different cooling levels when different refrigeration demands are required, the least electric energy is consumed, the satisfactory refrigeration effect is brought, the energy consumption is maximally saved, the refrigeration effect is improved, and the diversified use requirements of users are met.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a multi-airflow-path cooling household split air conditioning system. Background Technology

[0002] With the national policy of "carbon peaking and carbon neutrality," people are increasingly aware of the importance of energy conservation and emission reduction. Currently, energy consumption due to building environment construction accounts for as much as one-third of the total social energy consumption. Air conditioning, as a major consumer of this energy, significantly restricts the overall social energy consumption. The importance of energy conservation in air conditioning is self-evident. Therefore, while ensuring that people's quality of life is not affected, it is urgent to intensify the research and development of key technologies to reduce air conditioning energy consumption.

[0003] As is well known, users employ different air conditioning methods depending on the season and time of day. In particular, the heat dissipation of air conditioning systems in summer far exceeds the heat absorption required for heating in winter. While existing technologies utilize natural cold sources to reduce energy consumption during air conditioning operation—for example, using groundwater as a heat exchange medium to induce initial heat exchange in the airflow of the controlled environment before utilizing the air conditioner's own cooling system—this system suffers from several drawbacks. Firstly, it requires pumps to extract groundwater into the heat exchange system for heat exchange with the air before it enters the air conditioner. This involves numerous electrical components, making maintenance and use inconvenient and reducing system reliability. Secondly, when using natural cold sources, the system's workflow is relatively simple and not fully adaptable to the diverse temperature control adjustments required by air conditioners, resulting in poor applicability.

[0004] Therefore, how to reduce air conditioning energy consumption under cooling conditions and meet the diverse adjustment of user comfort is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention aims to propose a multi-airflow cooling household split air conditioning system, which utilizes the return air in the controlled environment space, combined with evaporative cooling technology, and uses the cooling capacity of underground shallow water wells and traditional household split air conditioning to consume minimal electrical energy, bring satisfactory cooling effect, maximize energy saving, improve its cooling effect, and achieve the purpose of energy conservation and emission reduction.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] A multi-airflow-path cooled household split-type air conditioning system includes:

[0008] An evaporative cooling system includes an evaporative cooling box, which is used to perform heat exchange treatment on the air in a controlled environment space, and the air after heat exchange in the evaporative cooling box flows to an underground shallow water well heat exchange system and / or a household split air conditioning system.

[0009] A groundwater shallow well heat exchange system includes a shallow well, a heat exchange device is installed in the shallow well, the inlet end of the heat exchange device is connected to an evaporative cooling system, and the outlet end of the heat exchange device is connected to a household split air conditioning system.

[0010] A household split-type air conditioning system includes an indoor unit, the air intake side of which is connected to the indoor unit air intake main pipe, and the indoor unit air intake main pipe is connected to an evaporative cooling system and an underground shallow water well heat exchange system through an air outlet branch pipe I and an air outlet main pipe, respectively.

[0011] Furthermore, the evaporative cooling chamber is located inside the controlled environment space.

[0012] Furthermore, an air inlet is provided on the evaporative cooling box, which is connected to the controlled environment space. An axial flow fan is provided inside the air inlet. An evaporative cooling box outlet duct is provided on the other side of the evaporative cooling box opposite to the air inlet. One end of the evaporative cooling box outlet duct is connected to the internal space of the evaporative cooling box, and the other end is connected to the underground shallow water well heat exchange system and the household split air conditioning system through outlet branch duct I and outlet branch duct II, respectively. An outlet branch duct I valve is provided on outlet branch duct I, and an outlet branch duct II valve is provided on outlet branch duct II.

[0013] Furthermore, a filter screen is installed at the air inlet, and several layers of water distribution nets are installed in the internal space of the evaporative cooling box between the axial flow fan and the air outlet pipe of the evaporative cooling box. A spray branch pipe is installed at the upper end of the water distribution net, and the spray branch pipe is connected to the water tank through the spray main pipe. The water tank is located at the bottom of the evaporative cooling box, and the water in the water tank can be sprayed onto the water distribution net through the spray main pipe and the spray branch pipe and flow into the water tank. The water tank is connected to the external space of the evaporative cooling box through the water tank drain pipe.

[0014] Furthermore, the heat exchange device includes a metal spiral heat exchange tube, one end of which is connected to the air outlet branch pipe II via an air inlet branch pipe, and the other end of which is connected to the main air outlet pipe via an air outlet branch pipe III. The metal spiral heat exchange tube is arranged in a spiral shape.

[0015] Furthermore, the metal spiral heat exchange tube is arranged in a spiral downward structure. At the end of the metal spiral heat exchange tube, it is connected to the air outlet branch pipe III through the air inlet branch pipe outlet. The air inlet branch pipe outlet is arranged with its shape inclined upward. The air outlet branch pipe III is located near the central axis of the metal spiral heat exchange tube. A liquid storage tank is provided at the lower end of the air outlet branch pipe III. The condensation generated in the air outlet branch pipe III during heat exchange can flow into the liquid storage tank and be discharged.

[0016] Furthermore, the shallow well is equipped with multiple metal spiral heat exchange tubes. Each metal spiral heat exchange tube is connected to the air outlet branch pipe II through an air inlet branch pipe, and each metal spiral heat exchange tube is connected to the main air outlet pipe through an air outlet branch pipe III.

[0017] Furthermore, a level gauge is installed inside the storage tank, a drain pipe is installed at the bottom of the storage tank, the top of the drain pipe extends out of the liquid surface of the shallow well, and a drain pump is installed on the drain pipe.

[0018] Furthermore, the indoor unit includes an indoor unit air inlet and an indoor unit air outlet. The indoor unit air inlet can be opened or closed. An indoor unit air inlet is provided on the indoor unit, and the indoor unit air inlet is connected to the indoor unit air inlet main pipe. An indoor unit air inlet main pipe valve is provided on the indoor unit air inlet main pipe.

[0019] Compared with existing technologies, the multi-airflow-path cooling household split air conditioning system of the present invention has the following advantages:

[0020] (1) The multi-airflow cooling household split air conditioning system of the present invention adjusts the air in the controlled environment space in stages, so that the indoor unit introduces heat exchange air of different cooling levels when different cooling needs are met, thereby achieving the minimum power consumption, bringing a satisfactory cooling effect, maximizing energy saving, improving its cooling effect, and meeting the diverse usage requirements of users.

[0021] (2) The multi-airflow cooling household split air conditioning system described in this invention utilizes the return air in the room to be cooled, which has a low temperature and can make full use of its cooling capacity without waste, further ensuring the reliability of reducing energy consumption during cooling.

[0022] (3) The multi-airflow cooling household split air conditioning system of the present invention has a multi-layer water distribution net in the evaporative cooling box, which increases the direct evaporative cooling effect and can significantly reduce the return air temperature to close to its corresponding wet bulb temperature, which facilitates the efficiency of heat exchange of return air in the first-level cooling mode and the reliable adjustment of the temperature after heat exchange.

[0023] (4) The multi-airflow cooling household split air conditioning system described in this invention uses metal spiral heat exchange tubes installed in underground shallow water wells. Due to the use of metal materials with good thermal conductivity and the spiral arrangement, the heat exchange area of ​​a single heat exchange tube is increased. Furthermore, the system is distributed in multiple rows, resulting in a large total heat exchange area, which greatly promotes the heat exchange effect and improves the ability of the return air to fully cool and exchange heat in the secondary cooling mode, thereby further improving the reliability of reducing energy consumption during cooling.

[0024] (5) The multi-airflow cooling household split air conditioning system described in this invention can adopt different levels of cooling modes according to the needs of the controlled environment space. The first-level cooling mode and the second-level cooling mode do not require starting the refrigeration compressor, but only need to run the axial flow fan. The power consumption is very small and the energy saving is huge. The third-level cooling mode requires starting the refrigeration compressor. Although the energy saving is not as great as the first-level cooling mode and the second-level cooling mode, the energy saving effect is still quite considerable.

[0025] (6) The multi-airflow cooling household split air conditioning system of the present invention can be used for heating in winter by simply opening the air inlet of the indoor unit and closing the main air outlet valve. At this time, the air conditioning system becomes a household split air conditioner, which does not affect winter heating and achieves the dual function of cooling and heating. Attached Figure Description

[0026] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0027] Figure 1 This is a schematic diagram of the evaporative cooling box described in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the spray branch pipe according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the heat exchange structure in the shallow well according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the metal spiral heat exchange tube according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the indoor unit modification described in an embodiment of the present invention;

[0032] Explanation of reference numerals in the attached figures:

[0033] 100. Evaporative cooling system; 200. Underground shallow water well heat exchange system; 300. Residential split air conditioning system; 1. Air inlet; 2. Filter screen; 3. Axial flow fan; 4. Circulating water pump; 5. Valve; 6. Spray main pipe; 7. Spray branch pipe; 8. Water distribution network; 9. Evaporative cooling box outlet pipe; 10. Evaporative cooling box; 11. Water tank; 12. Water tank drain pipe; 13. Drain valve; 14. Spray hole; 15. Outlet branch pipe I; 16. Outlet branch pipe II; 17. Outlet branch pipe I valve; 18. 19. Outlet branch pipe II valve; 20. Inlet branch pipe; 21. Metal spiral heat exchange tube; 22. Drain pipe; 23. Liquid level gauge; 24. Liquid storage tank; 25. Exhaust pipe; 26. Drain pump; 27. Drain pipe; 28. Shallow water well; 29. ​​Outlet branch pipe III; 30. Outlet main pipe; 31. Inlet branch pipe outlet; 32. Inlet main pipe valve; 33. Inlet main pipe inlet of indoor unit; 34. Indoor unit; 35. Inlet section of indoor unit; 36. Outlet section of indoor unit; 37. Heat exchange device. Detailed Implementation

[0034] To make the technical means and objectives and effects of the present invention easier to understand, the embodiments of the present invention will be described in detail below with reference to specific illustrations.

[0035] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0036] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] like Figures 1-5 As shown, this invention discloses a multi-airflow-path cooled household split-type air conditioning system, comprising:

[0039] Evaporative cooling system 100 includes evaporative cooling box 10, which is used to perform heat exchange treatment on the air in the controlled environment space. The air after heat exchange in the evaporative cooling box 10 flows to underground shallow water well heat exchange system 200 and / or household split air conditioning system 300.

[0040] The underground shallow water well heat exchange system 200 includes a shallow water well 27, in which a heat exchange device 37 is installed. The inlet end of the heat exchange device 37 is connected to the evaporative cooling system 100, and the outlet end of the heat exchange device 37 is connected to the household split air conditioning system 300.

[0041] A household split-type air conditioning system 300 includes an indoor unit 34. The air inlet side of the indoor unit 34 is connected to the indoor unit air inlet main pipe 32. The indoor unit air inlet main pipe 32 is connected to the evaporative cooling system 100 and the underground shallow water well heat exchange system 200 through the air outlet branch pipe I15 and the air outlet main pipe 29, respectively.

[0042] This invention discloses a multi-airflow-path cooling household split-type air conditioning system, comprising an evaporative cooling system 100, an underground shallow water well heat exchange system 200, and a household split-type air conditioning system 300. The indoor unit 34 of the household split-type air conditioning system 300 is a commercially available household split-type air conditioning indoor unit, including an indoor unit air inlet 35 and an indoor unit air outlet 36. An air duct assembly and a heat exchanger are arranged between the indoor unit air inlet 35 and the indoor unit air outlet 36. An indoor unit air inlet main duct 32, connected to the evaporative cooling system 100 and the underground shallow water well heat exchange system 200, is provided on the air inlet side of the indoor unit 34. The system is controlled by a system where the indoor unit 34 is located. When the environment requires cooling, the evaporative cooling system 100 can guide the air in the controlled environment to the interior of the evaporative cooling box 10 for preliminary heat exchange. The air after heat exchange can flow to the underground shallow water well heat exchange system 200 for further cooling and heat exchange, or it can flow directly to the household split air conditioning system 300. In the underground shallow water well heat exchange system 200, the cooling capacity in the underground shallow water well is used to further cool the air after heat exchange in the evaporative cooling system 100. Finally, the air with a lower temperature enters the indoor unit 34 through the indoor unit air intake duct 32. The indoor unit 34 performs rapid temperature regulation and control on the air entering through the indoor unit air intake duct 32 according to the preset adjustment temperature. The multi-airflow cooling household split air conditioning system of the present invention makes full use of the air in the controlled environment space. In combination with the evaporative cooling system 100 and the underground shallow water well heat exchange system 200, during the air conditioning cooling process, different levels of cooling modes are adopted according to the cooling needs of the controlled environment space where the indoor unit 34 is located. After the air reaches the required supply air temperature, it is delivered into the cooling space. Under the premise of meeting the human body temperature comfort, the goal of maximizing energy saving is achieved.

[0043] This invention discloses a multi-airflow-path cooling household split-type air conditioning system. During cooling operation, the indoor unit's air inlet 35 remains closed. All air entering the indoor unit comes from air that has undergone heat exchange through the evaporative cooling system 100 or cooled air that has undergone heat exchange through the underground shallow well heat exchange system 200. When the cooling demand of the controlled environment is small, a first-level cooling mode can be used, where the air cooled by the evaporative cooling system 100 is directly sent into the indoor unit 34 and then into the controlled environment through the indoor unit's air outlet 36. When the cold air cooled by the evaporative cooling system 100 and the underground shallow well heat exchange system 200 is directly sent from the indoor unit 34 into the controlled environment, the space temperature can be maintained within a comfortable range, eliminating the need to turn on the cooling compressor; this is a second-level cooling mode. When the second-level cooling mode cannot meet the human body's comfort requirements for the temperature environment, the air conditioning compressor is turned on through the control system, further cooling the air flowing into the indoor unit 34 through the evaporator of the indoor unit 34; this is a third-level cooling mode. When operating the heating system in winter, the indoor unit's air intake 35 can be opened and the indoor unit's main air intake duct 32 can be closed. At this time, the air conditioning system becomes a household split air conditioner, which does not affect winter heating.

[0044] This invention discloses a multi-airflow-path cooling household split air conditioning system. By classifying and adjusting the air in the controlled environment, the indoor unit 34 introduces heat exchange air of different cooling levels when different cooling needs are met, thereby achieving the lowest possible power consumption, delivering a satisfactory cooling effect, maximizing energy savings, improving cooling performance, and meeting diverse user requirements.

[0045] As an example of the present invention, the evaporative cooling box 10 is disposed inside the controlled environment space. Disposing the evaporative cooling box 10 of the evaporative cooling system 100 inside the controlled environment space avoids the influence of adverse external environments, ensuring the reliability and smoothness of airflow from the evaporative cooling box 10 to the controlled environment space during use of the multi-airflow cooling household split air conditioning system described in this invention.

[0046] As a preferred example of the present invention, an air inlet 1 is provided on the evaporative cooling box 10, the air inlet 1 is connected to the controlled environment space, an axial flow fan 3 is provided inside the air inlet 1, and an evaporative cooling box outlet duct 9 is provided on the other side of the evaporative cooling box 10 opposite to the air inlet 1. One end of the evaporative cooling box outlet duct 9 is connected to the internal space of the evaporative cooling box 10, and the other end is connected to the underground shallow water well heat exchange system 200 and the household split air conditioning system 300 respectively through outlet branch pipe I 15 and outlet branch pipe II 16. An outlet branch pipe I valve 17 is provided on the outlet branch pipe I 15, and an outlet branch pipe II valve 18 is provided on the outlet branch pipe II 16.

[0047] Preferably, a filter screen 2 is installed at the air inlet 1, and several layers of water distribution nets 8 are installed in the internal space of the evaporative cooling box 10 between the axial flow fan 3 and the air outlet pipe 9 of the evaporative cooling box. A spray branch pipe 7 is installed at the upper end of the water distribution net 8. The spray branch pipe 7 is connected to the water tank 11 through the spray main pipe 6. The water tank 11 is located at the bottom of the evaporative cooling box 10. The water in the water tank 11 can be sprayed onto the water distribution net 8 through the spray main pipe 6 and the spray branch pipe 7 and flow into the water tank 11. The water tank 11 is connected to the external space of the evaporative cooling box 10 through the water tank drain pipe 12.

[0048] This setup discloses the structure of an evaporative cooling chamber 10, such as... Figure 1 and Figure 2 As shown, the return air in the controlled environment space is filtered first by the filter screen 2 at the air inlet 1 under the action of the axial flow fan 3, and then passes through the water distribution network 8. As an example, three layers of water distribution networks 8 are set. Since a spray device is set in the evaporative cooling box 10 and a water tank 11 is set at the bottom, the water tank 11 is connected to the spray branch pipes 7 through the spray main pipe 6. As an example, a spray branch pipe 7 is set at the upper end of each water distribution network 8. Multiple spray branch pipes 7 are connected to the spray main pipe 6. A circulating water pump 4 and a valve 5 are set on the main channel of the spray main pipe 6. When in use, the valve 5 is opened, the circulating water pump 4 provides power to draw water from the water tank 11 into the spray main pipe 6, and then into the three spray branch pipes 7 respectively, and sprayed onto the water distribution network 8 through the spray holes 14. The return air inside the evaporative cooling box 10 directly exchanges heat with the sprayed water on the water distribution network 8 through evaporative cooling. In this process, the sensible heat of the air is transferred to the sprayed water, causing the air temperature to drop. The sprayed water absorbs heat and evaporates, generating latent heat of vaporization. The entire process uses the principle of dry-bulb and wet-bulb temperature difference to lower the air temperature. The greater the dry-bulb and wet-bulb temperature difference, the more obvious the cooling effect. The resulting water vapor then enters the air, ultimately cooling and humidifying the air. Except for a small amount of evaporated sprayed water that turns into water vapor and enters the air, most of the sprayed water drips back into the water tank 11 due to gravity. When there is a lot of water in the water tank 11 and it needs to be drained, the drain valve 13 on the drain pipe 12 of the water tank is opened, and the water in the water tank 11 is drained. If the water in the water tank 11 is insufficient and water needs to be added, water can be poured into it through the air inlet 1. The air after heat exchange flows to the household split air conditioning system 300 through the air outlet branch pipe I 15 or to the underground shallow water well heat exchange system 200 through the air outlet branch pipe II 16.

[0049] If the cooling capacity required by the controlled environment is small, simply open the outlet branch pipe I valve 17 and close the outlet branch pipe II valve 18. The evaporative cooled air can be directly sent into the indoor unit 34 through the outlet branch pipe I 15 of the evaporative cooling box outlet pipe 9, and enter the controlled environment for cooling from the indoor unit outlet 36. This is the so-called first-level cooling mode.

[0050] The evaporative cooling box 10 of the present invention, through the spray structure and water distribution network 8, applies the principle of dry and wet bulb temperature difference to improve the efficiency and effect of reducing air temperature, and increases the direct evaporative cooling effect. It can significantly reduce the return air temperature to close to its corresponding wet bulb temperature, thus meeting diverse temperature control adjustment needs.

[0051] As a preferred example of the present invention, the heat exchange device 37 includes a metal spiral heat exchange tube 20. One end of the metal spiral heat exchange tube 20 is connected to the air outlet branch pipe II 16 through the air inlet branch pipe 19, and the other end of the metal spiral heat exchange tube 20 is connected to the air outlet main pipe 29 through the air outlet branch pipe III 28. The metal spiral heat exchange tube 20 is arranged in a spiral shape.

[0052] like Figure 3 and Figure 4 As shown, if the first-stage cooling mode is not used, the outlet branch pipe I valve 17 is closed and the outlet branch pipe II valve 18 is opened. The cooling air coming out of the outlet branch pipe II 16 of the evaporative cooling box outlet pipe 9 will enter the metal spiral heat exchange tube 20 through the inlet branch pipe 19. Since the metal spiral heat exchange tube 20 is arranged in a spiral, the heat exchange area is increased, which is conducive to the heat exchange between the air and the cold water in the shallow well 27.

[0053] This setup utilizes the characteristic of lower water temperature in shallow underground wells during summer. The heat exchange air cooled by evaporation in the evaporation cooling box 10 is sent to the metal spiral heat exchange tube 20 in the shallow well 27 through an air supply duct with an external insulation layer. Combined with the spiral arrangement of the metal spiral heat exchange tube, the heat exchange area is further increased, thereby further improving the performance and reliability of the underground shallow well heat exchange system 200 in reducing the temperature of the heat exchange air.

[0054] Preferably, the metal spiral heat exchange tube 20 is arranged in a spiral downward structure. At the end of the metal spiral heat exchange tube 20, it is connected to the air outlet branch pipe III 28 through the air inlet branch pipe outlet 30. The air inlet branch pipe outlet 30 is arranged with its shape inclined upward. The air outlet branch pipe III 28 is located near the central axis of the metal spiral heat exchange tube 20. A liquid storage tank 23 is provided at the lower end of the air outlet branch pipe III 28. The condensation generated in the air outlet branch pipe III 28 during heat exchange can flow into the liquid storage tank 23 and be discharged.

[0055] This configuration ensures that when the heat exchange air undergoes further cooling and heat exchange in the metal spiral heat exchange tube 20, the vast majority of the heat exchange air enters the outlet branch pipe III 28, with only a small amount of air entering the liquid storage tank 23. Preferably, the liquid storage tank 23 is connected to the space above the liquid level of the shallow water well 27 via the exhaust pipe 24, allowing the small amount of air entering the liquid storage tank 23 to be discharged through the exhaust pipe 24. Simultaneously, during the heat exchange process between the air and the metal spiral heat exchange tube 20, the outlet branch pipe III 28, and even the inlet branch pipe 19, condensation occurs when the air cools to the dew point temperature. Under the influence of wind and gravity, this condensation flows into the drain pipe 21 and then into the liquid storage tank 23. This prevents condensate from being drawn into the indoor unit 34 during further cooling of the heat exchange air in the underground shallow water well heat exchange system 200. It also ensures that the heat exchange air undergoes sufficient heat exchange within the metal spiral heat exchange tube 20 and that most of the heat exchange air flows to the indoor unit 34.

[0056] This configuration allows the heat exchange device 37 to fully exchange heat with the heat exchange air during secondary cooling, while preventing condensate generated during secondary cooling from flowing to the indoor unit 34, thereby improving the cooling effect of the underground shallow well heat exchange system 200 and the reliability of the multi-airflow cooling household split air conditioning system described in this invention.

[0057] As a preferred example of the present invention, the shallow water well 27 is provided with a plurality of metal spiral heat exchange tubes 20, each of the metal spiral heat exchange tubes 20 being connected to the air outlet branch pipe II 16 through an air inlet branch pipe 19, and each of the metal spiral heat exchange tubes 20 being connected to the air outlet main pipe 29 through an air outlet branch pipe III 28.

[0058] By arranging multiple rows of metal spiral heat exchange tubes 20 in the shallow water well 27, the total heat exchange area is increased, further improving the heat exchange effect.

[0059] As a preferred embodiment of the present invention, a level gauge 22 is provided inside the storage tank 23, and a drain pipe 26 is provided at the bottom of the storage tank 23, with the top end of the drain pipe 26 extending beyond the liquid surface of the shallow well 27. A drain pump 25 is provided on the drain pipe 26. When the condensate in the storage tank 23 reaches the level gauge 22, the drain pump 25 is activated by a sensor to discharge the condensate through the drain pipe 26.

[0060] This design prevents excessive condensate in the storage tank 23 from affecting the reliability of condensate collection during heat exchange by the metal spiral heat exchange tube 20.

[0061] When the cooled air flows from the main air outlet 29 into the indoor unit 34, and then directly into the controlled environment space through the indoor unit's air outlet 36, the room cooling requirements can be met without starting the refrigeration compressor. This is the second-stage cooling mode.

[0062] As a preferred example of the present invention, the indoor unit 34 includes an indoor unit air inlet 35 and an indoor unit air outlet 36. The indoor unit air inlet 35 can be opened or closed. An indoor unit air inlet 33 is provided on the indoor unit 34. The indoor unit air inlet 33 is connected to the indoor unit air inlet 32. An indoor unit air inlet valve 31 is provided on the indoor unit air inlet 32.

[0063] This setup can be implemented in the multi-airflow cooling household split air conditioning system described in this invention by making simple modifications to the existing indoor unit. When cooling is required, if neither the first-level cooling mode nor the second-level cooling mode can meet the cooling requirements, the valve 31 of the indoor unit's main air inlet pipe is opened. The cold air, after evaporative cooling and heat exchange through the underground shallow well, flows from the main air outlet pipe 29 into the main air inlet pipe 32 of the indoor unit, and enters the indoor unit 34 through the air inlet 33 of the main air inlet pipe. The refrigeration compressor is started, and the air is further cooled by the evaporator in the indoor unit 34. The cooled air is then sent into the controlled environment space through the air outlet 36 of the indoor unit. Throughout the process, the air inlet 35 of the indoor unit remains closed. This mode is the third-level cooling mode. During winter heating, the indoor unit's air intake 35 is opened, the indoor unit's main air intake valve 31 is closed, and the evaporative cooling system 100 and the underground shallow water well heat exchange system 200 are no longer used. At this time, the air conditioning system becomes a traditional household split air conditioner, which does not affect winter heating.

[0064] This configuration enables the multi-airflow cooling household split air conditioning system described in this invention to be used with most commercially available split household air conditioners. While significantly reducing the cooling energy consumption of the air conditioner, it does not affect the original heating performance of the household split air conditioning system 300, meets the user's multi-functional temperature control adjustment needs, and also improves the user experience.

[0065] This invention also discloses a control method for a multi-airflow-path cooled household split-type air conditioning system, comprising the following steps:

[0066] S1: Indoor unit starts cooling operation;

[0067] S2: Start the axial fan, open the outlet branch pipe I valve, close the outlet branch pipe II valve, open the indoor unit inlet main valve, and run the secondary cooling mode;

[0068] S3: Run for a preset time t1, and detect the temperature of the controlled environment space T1 and the set temperature T1. 设 Determine if T1-T 设 If the value is less than or equal to A, then execute S4; otherwise, execute S10.

[0069] S4: Continue running for the preset time t2, and determine whether T2-T has elapsed. 设 If the value is less than or equal to B, proceed to S5; otherwise, proceed to S7.

[0070] S5: Close the outlet branch pipe I valve, open the outlet branch pipe II valve, run the first-level cooling mode, and start counter one;

[0071] S6: Preset operating time t3 for Level 1 cooling mode; check if T3-T... 设 If the value is ≤A, then continue running in Level 1 cooling mode; otherwise, enter S7.

[0072] S7: Run in secondary cooling mode, continue running for the preset time t4, and determine if T4-T is reached. 设 If ≤B, proceed to S8; otherwise, proceed to S9.

[0073] S8: Run the first-level cooling mode, increment counter 1 by 1, and check if the counter 1 reading is greater than C. If not, proceed to S6; if yes, proceed to S9.

[0074] S9: Run in secondary cooling mode, continue running for the preset time t5, and determine if T5-T is reached. 设 If the value is less than or equal to A, then continue to execute the second-level cooling mode; otherwise, run S10.

[0075] S10: The indoor unit starts the refrigeration compressor, runs in level 3 refrigeration mode, continues to run for the preset time t6, and checks if T6-T is reached. 设 If ≤D, the compressor stops running, the third-stage refrigeration mode ends, and the second-stage refrigeration mode continues to run, entering S9; otherwise, it continues to run S10.

[0076] Wherein, t1, t2, t3, t4, t5, and t6 are preset empirical time parameters, T1, T2, T3, T4, T5, and T6 are the controlled environment space temperature values ​​detected after running for a preset time, A, B, and D are preset empirical temperature difference values, B is less than or equal to A, and C is a preset empirical count value.

[0077] As an example, the value range of t1 is 30s to 120s, the value range of t2, t3, t4, t5, and t6 is 180s to 600s, the value range of A is 3℃ to 8℃, the value range of B is 1℃ to 3℃, the value range of D is -2℃ to 0℃, and the value range of C is 3 to 5 times.

[0078] The multi-airflow cooling household split air conditioning system described in this invention allows for alternating use of first, second, and third-level cooling modes throughout the entire cooling period. In particular, the alternation of second and third-level cooling modes not only meets the cooling comfort requirements of the controlled environment but also achieves energy conservation.

[0079] Here's an example illustrating how the two-stage cooling mode can't meet the body's comfort requirements for temperature. If the temperature in the controlled environment exceeds the set temperature by more than 1°C, a three-stage cooling mode is activated. This involves the control system turning on the air conditioner's compressor to further cool the air flowing into the indoor unit via the evaporator. If the indoor temperature drops to 2°C below the set temperature, the compressor stops, and the three-stage cooling mode ends. The two-stage cooling mode then resumes until the indoor temperature exceeds the set temperature by more than 1°C again, at which point the three-stage cooling mode restarts. This cycle repeats continuously, ensuring energy savings while maintaining a comfortable room temperature.

[0080] To illustrate the energy efficiency of the air conditioning system described in this invention during summer cooling, an example is used for analysis and demonstration. Taking a 1.5 horsepower household split-type air conditioner as an example, with an indoor ambient temperature of 27°C and a relative humidity of 50%, the corresponding wet-bulb temperature is 19.5°C. The temperature of the cold air blown out from the indoor unit is 14°C, and the indoor unit's air volume is 650 m³ / h. Using this air conditioning system, the temperature is first reduced from 27°C to 20.2°C via an evaporative cooling system (assuming a water distributor efficiency of 90%). Then, the temperature is further reduced by 2.5°C via a shallow water well metal spiral heat exchanger, resulting in a final air temperature of 17.7°C. A comparative analysis can be performed using the enthalpy difference method. The cooling capacity of a commercially available household split-type air conditioner is 3537W; however, with the air conditioning system of this invention, only a reduction from 17.7°C to 14°C requires a compressor cooling capacity of 2311W, resulting in a saving of 1226W, or 34.7%. If the first-level cooling mode is used, in which air at 20.2°C after evaporation is directly introduced into the controlled environment, or if the second-level cooling mode is used, in which case air at 17.7°C is directly introduced into the controlled environment, the cooling demand can be met. In this case, there is no need to start the refrigeration compressor, so the third-level cooling mode is used, and the energy-saving effect will be more obvious.

[0081] This invention discloses a multi-airflow-path cooling household split-type air conditioning system, which mainly consists of three parts: an evaporative cooling system 100 for the controlled environment space, an underground shallow water well heat exchange system 200, and a household split-type air conditioning system 300. It has three different cooling modes. By cooling the return air of the controlled environment space, different levels of cooling modes can be adopted according to the cooling needs of the controlled environment space, so that the air reaches the required supply air temperature and is then delivered into the controlled environment space. Under the premise of meeting the human body temperature comfort, the goal of maximizing energy saving is achieved.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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-airflow-path cooled household split-type air conditioning system, characterized in that, include: An evaporative cooling system (100) includes an evaporative cooling box (10) for heat exchange treatment of air in a controlled environment space, wherein the air after heat exchange in the evaporative cooling box (10) flows to an underground shallow water well heat exchange system (200) and / or a household split air conditioning system (300). The underground shallow water well heat exchange system (200) includes a shallow water well (27), and a heat exchange device (37) is installed in the shallow water well (27). The inlet end of the heat exchange device (37) is connected to the evaporative cooling system (100), and the outlet end of the heat exchange device (37) is connected to the household split air conditioning system (300). A household split-type air conditioning system (300) includes an indoor unit (34), the air inlet side of which is connected to the indoor unit air inlet main pipe (32), and the indoor unit air inlet main pipe (32) is connected to the evaporative cooling system (100) and the underground shallow water well heat exchange system (200) through the air outlet branch pipe I (15) and the air outlet main pipe (29), respectively. The indoor unit (34) includes an indoor unit air inlet (35) and an indoor unit air outlet (36). The indoor unit air inlet (35) can be opened or closed. An indoor unit air inlet (33) is provided on the indoor unit (34). The indoor unit air inlet (33) is connected to the indoor unit air inlet (32). An indoor unit air inlet valve (31) is provided on the indoor unit air inlet (32). The heat exchange device (37) includes a metal spiral heat exchange tube (20). One end of the metal spiral heat exchange tube (20) is connected to the air outlet branch pipe II (16) through the air inlet branch pipe (19), and the other end of the metal spiral heat exchange tube (20) is connected to the air outlet main pipe (29) through the air outlet branch pipe III (28). The metal spiral heat exchange tube (20) is arranged in a spiral shape. The metal spiral heat exchange tube (20) is arranged in a spiral downward structure. At the end of the metal spiral heat exchange tube (20), it is connected to the air outlet branch pipe III (28) through the air inlet branch pipe outlet (30). The air inlet branch pipe outlet (30) is arranged with its shape tilted upward. The air outlet branch pipe III (28) is located near the central axis of the metal spiral heat exchange tube (20). A liquid storage tank (23) is provided at the lower end of the air outlet branch pipe III (28). The condensation generated in the air outlet branch pipe III (28) during heat exchange can flow into the liquid storage tank (23) and be discharged. The shallow well (27) is equipped with multiple metal spiral heat exchange tubes (20). Each metal spiral heat exchange tube (20) is connected to the air outlet branch pipe II (16) through an air inlet branch pipe (19), and each metal spiral heat exchange tube (20) is connected to the air outlet main pipe (29) through an air outlet branch pipe III (28).

2. The multi-airflow-path cooling household split air conditioning system according to claim 1, characterized in that, The evaporative cooling box (10) is located inside the controlled environment space.

3. The multi-airflow-path cooling household split air conditioning system according to claim 2, characterized in that, An air inlet (1) is provided on the evaporative cooling box (10), and the air inlet (1) is connected to the controlled environment space. An axial flow fan (3) is provided inside the air inlet (1). An evaporative cooling box outlet pipe (9) is provided on the other side of the evaporative cooling box (10) opposite to the air inlet (1). One end of the evaporative cooling box outlet pipe (9) is connected to the internal space of the evaporative cooling box (10), and the other end is connected to the underground shallow water well heat exchange system (200) and the household split air conditioning system (300) respectively through outlet branch pipe I (15) and outlet branch pipe II (16). An outlet branch pipe I valve (17) is provided on the outlet branch pipe I (15), and an outlet branch pipe II valve (18) is provided on the outlet branch pipe II (16).

4. The multi-airflow-path cooling household split air conditioning system according to claim 3, characterized in that, A filter screen (2) is installed at the air inlet (1). Several layers of water distribution nets (8) are installed in the internal space of the evaporative cooling box (10) between the axial flow fan (3) and the air outlet pipe (9) of the evaporative cooling box. A spray branch pipe (7) is installed at the upper end of the water distribution net (8). The spray branch pipe (7) is connected to the water tank (11) through the spray main pipe (6). The water tank (11) is located at the bottom of the evaporative cooling box (10). The water in the water tank (11) can be sprayed onto the water distribution net (8) through the spray main pipe (6) and the spray branch pipe (7) and flow into the water tank (11). The water tank (11) is connected to the external space of the evaporative cooling box (10) through the water tank drain pipe (12).

5. The multi-airflow-path cooling household split air conditioning system according to claim 4, characterized in that, A level gauge (22) is installed inside the storage tank (23), and a drain pipe (26) is installed at the bottom of the storage tank (23). The top end of the drain pipe (26) extends out of the liquid surface of the shallow well (27), and a drain pump (25) is installed on the drain pipe (26).

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