An air conditioning system based on a shallow water heat exchange well

Abstract

The present invention provides an air conditioning system based on a shallow water heat exchange well, which includes a shallow well heat exchange component. The outside of the shallow well heat exchange component is in contact with the shallow well wall, and the inside thereof is in contact with well water. The shallow well heat exchange component is communicated with a water storage tank through a water inlet pipe. The water storage tank is communicated with an indoor terminal heat exchanger through a water outlet pipe. The indoor terminal heat exchanger is communicated with the water storage tank through a water storage tank return pipe, and the indoor terminal heat exchanger is also communicated with the shallow well heat exchange component through a heat exchange well return pipe. A first valve is provided on the water storage tank return pipe, and a second valve is provided on the heat exchange well return pipe. By comparing the return water temperature in the water storage tank return pipe with the well water temperature, the opening of the first valve and the second valve is selected. A coil pipe and a temperature measuring element are provided in the water storage tank, and the coil pipe is communicated with the outdoor unit of a household split air conditioner. The present invention can save air conditioning energy consumption and has a wide range of applications.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning refrigeration, and specifically to an air-conditioning system based on a shallow water heat exchange well. Background Art

[0002] With the continuous consumption and gradual depletion of fossil energy, as well as the continuous increase in global carbon dioxide emissions, the challenges and impacts faced are profound. It will not only trigger extreme climate events, affect biodiversity, but also pose challenges to economies and industries that rely on fossil energy, resulting in a decline in productivity and disruptions in the supply chain. Therefore, under the "dual carbon" policy, how to reduce the consumption of fossil energy and utilize renewable energy has become a major matter that humans have to choose.

[0003] However, in the hot summer, the operation of air-conditioning refrigeration usually requires a large amount of electricity, which directly affects the overall energy consumption. This is the reason for the high energy consumption of air conditioners in the hot summer, and thus makes air conditioners the leading consumer in building energy consumption. How to reduce air-conditioning energy consumption has become a difficult problem that urgently needs to be solved in the air-conditioning refrigeration industry, and it is also a very crucial link in implementing the "dual carbon" policy.

[0004] In recent years, scientific research workers like to use renewable energy or clean energy to drive air-conditioning refrigeration, such as solar air conditioners, gas air conditioners, ground-source heat pumps, water-source heat pumps, etc. They even use waste heat recovery from high-temperature waste gas, high-temperature wastewater, etc. to drive air conditioners. There are various forms, which have greatly promoted the development of air conditioners, saved energy consumption, and even driven good economic benefits. However, most of the above-mentioned air-conditioning drive schemes have the problem of high cost. As an ancient and long-established drinking water well, although the shallow water well has gradually faded out of people's vision, as a natural "cold storage", it also belongs to a kind of renewable energy. With people's attention to renewable energy, it is believed that it will regain its vitality. Based on this, by transforming the structure of the original shallow water well into a heat exchange well that provides cold source for air conditioners, it can greatly save the energy consumption of air conditioners, and it is green and environmentally friendly, which has very important significance. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an air-conditioning system based on a shallow water heat exchange well, which is suitable for rural residences, villas, small office buildings, etc. where it is convenient to drill wells, does not occupy ground space, has a simple structure, a low cost, greatly saves energy consumption, has a wide range of applications, has good economic benefit potential, and has an excellent future prospect.

[0006] To solve the above technical problems, the implementation solution provided by the present invention is to provide an air conditioning system based on a shallow water heat exchange well, including a shallow well heat exchange component, which is arranged in the shallow well, and the outside of the shallow well heat exchange component is in contact with the shallow well wall, and the inside of the shallow well heat exchange component is in contact with water;

[0007] A water storage tank for storing the cooled circulating water. The water storage tank is communicated with the shallow well heat exchange component through a water inlet pipe. A coil pipe and a temperature measuring element are arranged inside the water storage tank. The coil pipe is communicated with the outdoor unit of a household split air conditioner, and is used for further cooling the water stored in the water storage tank by starting the outdoor unit;

[0008] An indoor terminal heat exchanger is communicated with the water storage tank through an outlet pipe and a water pump. The indoor terminal heat exchanger is communicated with the water storage tank through a water storage tank return pipe. A first valve is arranged on the water storage tank return pipe. The indoor terminal heat exchanger is also communicated with the shallow well heat exchange component through a heat exchange well return pipe. A second valve is arranged on the heat exchange well return pipe. The output water after the indoor terminal heat exchanger exchanges heat with the room air is circulated and cooled through the shallow well heat exchange component;

[0009] When the return water temperature in the water storage tank return pipe is lower than the well water temperature, the first valve is opened and the second valve is closed; when the return water temperature in the water storage tank return pipe is higher than the well water temperature, the first valve is closed and the second valve is opened.

[0010] Preferably, the shallow well heat exchange component includes an annular hollow shell, and the annular hollow shell is vertically separated into a plurality of water channels by a partition plate. The first water channel is communicated with the indoor terminal heat exchanger through a heat exchange well return pipe. A water passing hole is arranged between every two adjacent water channels. A water channel outlet is arranged on the last water channel adjacent to the first water channel. The water channel outlet is communicated with the water storage tank through a water inlet pipe.

[0011] Preferably, the plurality of water passing holes opened on the plurality of water channels are arranged in a serpentine layout after being sequentially communicated.

[0012] Preferably, the outer side wall of the annular hollow shell is attached to the well wall of the shallow well heat exchange component, and the inner side wall of the annular hollow shell is in contact with the well water.

[0013] Preferably, the shallow well heat exchange component is a plurality of concentrically sleeved annular hollow shells, and the plurality of annular hollow shells are communicated with each other. The annular hollow shell farthest from the center of the circle is communicated with the water outlet of the indoor terminal heat exchanger through a heat exchange well return pipe. The annular hollow shell closest to the center of the circle is communicated with the water storage tank through a water inlet pipe.

[0014] Preferably, a plurality of the annular hollow shells are each vertically partitioned into a plurality of water channels by partitions. The first water channel of the annular hollow shell farthest from the center of the circle is communicated with the indoor terminal heat exchanger through a heat exchange well return pipe. Water passing holes are provided between every two adjacent water channels. The last water channel of the annular hollow shell farthest from the center of the circle is communicated with the first water channel of another adjacent annular hollow shell through a water channel outlet. Water passing holes are provided between every two adjacent water channels in this annular hollow shell. The last water channel of this annular hollow shell is communicated with the first water channel of another adjacent annular hollow shell through a water channel outlet. The plurality of annular hollow shells are connected in this connection manner until the water channel outlet of the last water channel of the annular hollow shell closest to the center of the circle is communicated with the water storage tank through a water inlet pipe.

[0015] Preferably, the plurality of water passing holes opened on the plurality of water channels of each of the annular hollow shells are sequentially communicated and arranged in a serpentine shape.

[0016] Preferably, a plurality of hollow conical structures are provided on the inner wall of each water channel. The top of the conical structure is sealed, the bottom of the conical structure is open, and the top of the conical structure is fixed on the inner wall of each water channel along the radial direction of the annular hollow shell.

[0017] Preferably, a plurality of small cones are evenly distributed on the peripheral wall of the conical structure.

[0018] Preferably, the shallow well heat exchange component can also be communicated with an outdoor hanging unit through a heat exchange well outlet pipe, so as to exchange heat with an evaporator in the outdoor hanging unit, so that the heat after heat exchange is sent into the room through an indoor hanging unit. A third valve is provided on the heat exchange well outlet pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. The present invention makes full use of the renewable energy of shallow underground water. It judges whether to turn on the split air conditioner according to the cooling capacity required by the room. When the cooling capacity required by the cooling room is small, only a small amount of power such as a water pump needs to be consumed to directly perform cooling, and there is no need to turn on the split air conditioner. When the cooling capacity required by the cooling room is large, the household split air conditioner can be turned on to compensate for the cooling capacity, and the normal cooling demand of the room can still be ensured. In either mode, the air conditioner energy consumption can be maximally reduced and the carbon emissions can be reduced.

[0021] 2. The shallow well heat exchange component given in the present invention adopts a structure of three or more layers nested from the outside to the inside. This structure itself enhances the contact area between the heat exchange well and the well water, and through a plurality of water channels, a very long flowing path of the flowing water is created, so that the water in the water channels can fully exchange heat with the soil and the well water, greatly enhancing the heat exchange effect.

[0022] 3. The present invention arranges a large number of conical structures on the well wall of the shallow water well heat exchanger, and the outer surface of the conical structure is covered with small cones, which not only increases the area of ​​the water channel, but also increases the disturbance of the water flow, enhances the turbulence, forms turbulence, and easily forms more small eddies. Part of the boundary layer of the fluid is destroyed, which greatly enhances the heat exchange with the soil or well water and improves the heat exchange efficiency of the shallow water well heat exchanger.

[0023] 4. The shallow water well heat exchanger provided by the present invention does not occupy ground space, has a simple structure, and is not expensive. It is suitable for use in places where wells can be dug, has a wide range of applications, has great economic benefit potential, and has promising future prospects.

[0024] 5. The shallow water well heat exchanger provided by the present invention can be used not only for air conditioning cooling in summer, but also for air conditioning heating in winter. This allows the shallow water well heat exchanger to achieve a dynamic balance between heat input and output in both winter and summer, which is beneficial to the long-term use of the shallow water well heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of a refrigeration and air conditioning system of a shallow water well heat exchanger according to the present invention.

[0026] Figure 2 This is a schematic diagram of the structure of the No. 1 shallow water well heat exchange component of the present invention.

[0027] Figure 3 It is a schematic diagram of the partial structure of the No. 1 shallow water well heat exchanger of the present invention.

[0028] Figure 4 It is a cross-sectional schematic diagram of the shallow water well heat exchange component of the present invention.

[0029] Figure 5 It is a schematic diagram of the partial structure of the shallow water well heat exchanger of the present invention.

[0030] Figure 6 It is a schematic diagram of the well wall tapered structure of the present invention.

[0031] Figure 7 This is a surface structure diagram of the conical structure of the present invention.

[0032] Description of reference numerals:

[0033] 1. Household split air conditioner; 2. Water storage tank; 3. Coil pipe; 4. Thermometer; 5. Indoor terminal heat exchanger; 6. Water pump; 7. Shallow well heat exchanger; 8. Cone structure; 9. Cone; 10. Water storage tank return pipe; 11. Heat exchange well return pipe; 12. Outlet pipe; 13. Inlet pipe; 14. Partition board; 7-1. First water channel; 7-11. First water channel outlet; 7-111. Well wall of No. 1 shallow well heat exchanger; 7-2. Second water channel; 7-21. Second water channel outlet; 7-3. Third water channel; 7-31. Third water channel outlet; 7-4. Fourth water channel; 7-41. Fourth water channel outlet; 7-5. Fifth water channel; 7-51. Fifth water channel outlet; 7-6. Sixth water channel; 7-61. Sixth water channel outlet; 7-7. Seventh water channel; 7-71. Seventh water channel outlet; 7-8. Eighth water channel; 7-81. Eighth water channel outlet; 7-9. Water channel of No. 1 and No. 2 shallow well heat exchangers; 7-10. Water channel of No. 2 and No. 3 shallow well heat exchangers; 7-1b. No. 2 shallow well heat exchanger; 7-12. First water channel of No. 2 shallow well heat exchanger; 7-121. Inlet of the first water channel of No. 2 shallow well heat exchanger; 7-13. Eighth water channel of No. 2 shallow well heat exchanger; 7-14. First water channel of No. 3 shallow well heat exchanger; 7-15. Eighth water channel of No. 3 shallow well heat exchanger. Detailed implementation manners

[0034] In order to make the above objects, features, and advantages of the embodiments of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] The inventor found that as a source of daily domestic water in the past, the shallow well is a natural "cold storage" because the water temperature of the well water is constant and it is connected to the groundwater. Moreover, the well water is in good contact with the well wall over a large area at all times, and the heat exchange effect is good. Therefore, the structure of the shallow well can be transformed to form a set of "well" structures and transformed into a heat exchange well, so as to make full use of the energy in the shallow well.

[0036] In view of this, the present invention makes full use of the renewable energy of shallow groundwater. When the cooling capacity required by the refrigerated room is small, only a small amount of power such as a water pump needs to be consumed to directly perform refrigeration, and there is no need to turn on the split air conditioner; when the cooling capacity required by the refrigerated room is large, the household split air conditioner can be turned on to compensate for the cooling capacity, still ensuring the normal cooling demand of the room. In either mode, it can maximize the reduction of air conditioner energy consumption and reduce carbon emissions.

[0037] As Figures 1 to 7 shown, the present invention provides an air conditioning system based on a shallow water heat exchange well, including a shallow well heat exchange member 7 disposed in a shallow well, with the outside of the shallow well heat exchange member 7 in contact with the shallow well wall and the inside of the shallow well heat exchange member 7 in contact with water. The shallow well heat exchange member is connected to a water storage tank 2 through a water inlet pipe 13 and a water pump. The water storage tank 2 is connected to an indoor terminal heat exchanger 5 through a water outlet pipe 12. The indoor terminal heat exchanger 5 is connected to the water storage tank 2 through a water storage tank return pipe 10. The indoor terminal heat exchanger 5 is also connected to the shallow well heat exchange member through a heat exchange well return pipe 11. A first valve is provided on the water storage tank return pipe 10, and a second valve is provided on the heat exchange well return pipe 11. The shallow well heat exchange member is used to circulate and cool the output water after heat exchange between the indoor terminal heat exchanger 5 and the room air, and the cooled water is sent back into the water storage tank 2 for storage again;

[0038] When the temperature of the return water in the water storage tank return pipe 10 is lower than the temperature of the well water, the first valve opens and the second valve closes; when the temperature of the return water in the water storage tank return pipe 10 is higher than the temperature of the well water, the first valve closes and the second valve opens;

[0039] A coil pipe 3 and a temperature measuring element 4 are provided in the water storage tank 2. The coil pipe 3 is connected to the outdoor unit of a household split air conditioner 1 and is used to further cool the water stored in the water storage tank 2 by starting the outdoor unit.

[0040] As Figure 1 shown, the cold water cooled by the shallow well heat exchange member 7 enters the water storage tank 2 through the water inlet pipe 13, and the thermometer 4 can continuously monitor the water temperature in the water storage tank 2.

[0041] When the cooling load of the room is small, the household split air conditioner 1 does not need to be turned on. Driven by a water pump 6, the water is directly sent into the indoor terminal heat exchanger 5 through the water outlet pipe 12 for room cooling. At this time, the first valve closes and the second valve opens, and the return water enters the shallow well heat exchange member 7 through the heat exchange well return pipe 11 to be cooled again.

[0042] When the cooling load of the room is large and the chilled water directly entering the indoor terminal heat exchanger 5 for refrigeration still cannot meet the room's refrigeration needs, the household split air conditioner 1 is turned on. The water in the water storage tank 2 is further cooled through the coil 3. When the set low temperature is reached, the household split air conditioner 1 is turned off to ensure that the refrigeration demand of the indoor room is met. At this time, if the return water temperature in the return water pipe 11 of the heat exchange well is higher than the well water temperature, the first valve is closed and the second valve is opened. The return water in the return water pipe 11 of the heat exchange well is sent into the shallow well heat exchange element 7. If the return water temperature in the return water pipe 11 of the heat exchange well is lower than the well water temperature of the shallow well heat exchange element 7, the second valve is closed and the first valve is opened. The return water in the return water pipe 11 of the heat exchange well is sent into the water storage tank 2 through the water storage tank return water pipe 10.

[0043] During this process, temperature probes need to be arranged in the water storage tank return water pipe 10 and the shallow well heat exchange element 7 respectively to detect the return water temperature in the water storage tank return water pipe 10 and the well water temperature in the shallow well heat exchange element 7 respectively. The temperature probes arranged in the water storage tank return water pipe 10 and the shallow well heat exchange element 7, the first valve, and the second valve are all connected to the controller. The controller selectively opens and closes the first valve and the second valve according to the comparison of the temperature measurement results of the well water in the shallow well heat exchange element 7 and the water in the water storage tank return water pipe 10.

[0044] Specifically, as Figures 2 to 3 shown, the shallow well heat exchange element 7 includes an annular hollow shell. The heat exchange surface of the annular hollow shell is the largest. The annular hollow shell is divided into multiple water channels vertically by partitions. The first water channel is connected to the indoor terminal heat exchanger 5 through the return water pipe of the heat exchange well. Water passing holes are provided between every two adjacent water channels. A water channel outlet is provided on the last water channel adjacent to the first water channel. The water channel outlet is connected to the water storage tank 2 through a water inlet pipe. The purpose of this is to increase the flow path of the water, so that there is sufficient indirect contact time between the flowing water and the soil and the well water, making the convective heat transfer more sufficient.

[0045] Specifically, as Figures 2 to 3 shown, the multiple water passing holes opened on the multiple water channels are connected in sequence and arranged in a snake shape. The snake-shaped flow can further increase the flow path of the water, so that there is sufficient indirect contact time between the flowing water and the soil and the well water, making the convective heat transfer more sufficient.

[0046] Specifically, as Figures 2 to 3 shown, the outer side wall of the annular hollow shell is attached to the well wall of the shallow well heat exchange element 7, and the inner side wall of the annular hollow shell is in contact with the well water. The purpose of this is: the outer side wall of the annular hollow shell is closely attached to the soil to prevent the shallow well heat exchange element 7 from collapsing, and the inner side wall of the annular hollow shell is in contact with the well water, so that the heat exchange area is large.

[0047] Specifically, asFigures 4 to 5 As shown in the figure, the shallow well heat exchanger 7 is a plurality of concentrically arranged circular ring-shaped hollow shells, and the plurality of circular ring-shaped hollow shells are interconnected. The circular ring-shaped hollow shell farthest from the center of the circle is connected to the water outlet of the indoor terminal heat exchanger 5 through the heat exchange well return pipe 11, and the circular ring-shaped hollow shell closest to the center of the circle is connected to the water storage tank 2 through the water inlet pipe 13.

[0048] Specifically, as Figures 4 to 5 shown, in order to further increase the contact area between the shallow well heat exchanger 7 and the well water, and through a plurality of water channels, a very long flowing water path is created, so that the water in the water channels can fully exchange heat with the soil and the well water, greatly enhancing the heat exchange effect. The plurality of circular ring-shaped hollow shells are each vertically separated into a plurality of water channels by a partition plate 14. The first water channel of the circular ring-shaped hollow shell farthest from the center of the circle is connected to the indoor terminal heat exchanger 5 through the heat exchange well return pipe 11. Water passing holes are provided on every two adjacent water channels. The last water channel of the circular ring-shaped hollow shell farthest from the center of the circle is connected to the first water channel of another adjacent circular ring-shaped hollow shell through a water channel outlet. Water passing holes are provided on every two adjacent water channels in this circular ring-shaped hollow shell. The last water channel in this circular ring-shaped hollow shell is connected to the first water channel of another adjacent circular ring-shaped hollow shell through a water channel outlet. The plurality of circular ring-shaped hollow shells are connected in this connection manner until the water channel outlet of the last water channel of the circular ring-shaped hollow shell closest to the center of the circle is connected to the water storage tank 2 through the water inlet pipe 13.

[0049] Specifically, as Figures 4 to 5 shown, the plurality of water passing holes opened on the plurality of water channels of each of the circular ring-shaped hollow shells are arranged in a serpentine layout after being sequentially connected. The serpentine flow can further increase the flow path of the water, so that there is sufficient indirect contact time between the flowing water and the soil and the well water, making the convective heat exchange more sufficient.

[0050] Specifically, as Figure 6 shown, a plurality of hollow conical structures 8 are provided on the inner wall of each water channel. The top of the conical structure 8 is sealed, the bottom of the conical structure 8 is open, and the top of the conical structure 8 is fixed on the inner wall of each water channel along the radial direction of the circular ring-shaped hollow shell. Due to the conical structure setting, when the flowing water passes through the water channel, the water flow is more likely to present a turbulent flow and a disturbance phenomenon, and small eddies are likely to appear, which can break a part of the boundary layer of the fluid, further enhancing the heat exchange between the flowing water and the soil or the well water.

[0051] Specifically, as Figure 7 shown, a plurality of cones 9 are evenly distributed on the peripheral wall of the conical structure 8. Since a plurality of cones 9 are provided in each conical structure, a part of the boundary layer of the fluid is quickly broken, further enhancing the heat exchange between the flowing water and the soil or the well water.

[0052] Specifically, the shallow well heat exchanger 7 can also be connected to the outdoor unit through the heat exchange well outlet pipe, so as to exchange heat with the evaporator in the outdoor unit, so that the heat after heat exchange is sent into the room through the indoor unit. A third valve is provided on the heat exchange well outlet pipe. When heating in winter, the water coming out of the heat exchange well can also be used for heating by means of the shallow well heat exchanger 7. At this time, the end of the heat exchange well outlet pipe is placed on the top of the evaporator. The water can directly flow into the evaporator through the pipeline, and finally fall into the water tank by gravity and then flow back into the heat exchange well. During this process, the water exchanges heat with the evaporator. The evaporator absorbs heat from the water and delivers the heat to the room to achieve the purpose of heating; after the water exchanges heat with the evaporator, the water temperature decreases and returns to the heat exchange well to exchange heat again and is reused in turn.

[0053] In this way, the shallow well heat exchanger 7 achieves a dynamic balance of heat input and output in winter and summer, which is beneficial to the long-term use of the shallow well heat exchanger 7. Specific embodiments

[0055] The shallow well heat exchanger 7 adopts a structure in which three or more layers of circular hollow shells are nested from the outside to the inside. Here, a structure formed by nesting three layers of circular hollow shells is given.

[0056] As Figure 1 shown, the cooled cold water enters the water storage tank 2 through the water inlet pipe. The thermometer 4 can continuously monitor the water temperature in the water storage tank. When the cooling load of the room is small and the household split air conditioner 1 does not need to be turned on, it is directly sent to the indoor terminal heat exchanger 5 through the water outlet pipe by the drive of the water pump 6 for room cooling. At this time, the first valve is closed and the second valve is opened. The return water enters the shallow well heat exchanger 7 through the heat exchange well return pipe 11 and is cooled again; when the cooling load of the room is large and the cooled cold water directly entering the indoor terminal heat exchanger 5 for cooling still cannot meet the room cooling requirement, the household split air conditioner 1 is turned on, and the water in the water storage tank 2 is further cooled through the coil 3. When the set low temperature is reached, the household split air conditioner 1 is turned off to ensure that the indoor room cooling demand is met. At this time, if the return water temperature is higher than the well water temperature, the first valve is closed and the second valve is opened, and the return water is sent to the shallow well heat exchanger 7. If the return water temperature is lower than the well water temperature, the second valve is closed and the first valve is opened, and the return water is sent to the water storage tank 2 through the water storage tank return pipe 10.

[0057] As Figures 2 to 3As shown in the figure, the return water enters the first water channel 7-1 through the water inlet of the No. 1 heat exchange well, enters the second water channel 7-2 through the first water channel outlet 7-11 at the bottom, flows out through the second water channel outlet 7-21 at the top of the second water channel 7-2, and enters the third water channel 7-3. Similarly, through the third water channel outlet 7-31, the flowing water enters the fourth water channel 7-4, flows into the fifth water channel 7-5 through the fourth water channel outlet 7-41, and similarly, through the fifth water channel outlet 7-51 at the bottom of the fifth water channel 7-5, it flows into the sixth water channel 7-6, flows into the seventh water channel 7-7 through the sixth water channel outlet 7-61, and finally flows into the eighth water channel 7-8 through the seventh water channel outlet 7-71. Each water channel is separated by a water channel partition 14 and is in a closed state except for the water inlet and outlet of the water channel. In addition, the outside of the No. 1 shallow well heat exchange element is closely attached to the soil to prevent the collapse of the shallow well heat exchange element. The inner wall 7-111 of the No. 1 shallow well heat exchange element contacts the well water. This makes the heat exchange area large, and the flowing water flows in a serpentine manner in each water channel, increasing the flow path and allowing sufficient indirect contact time between the flowing water, the soil, and the well water, making the convective heat exchange more sufficient. After the return water is heat-exchanged in the No. 1 shallow well heat exchange element, it enters the next heat exchange well through the eighth water channel outlet 7-81 to continue heat exchange.

[0058] As Figure 4 and Figure 5 shown in the figure, an eighth water channel outlet 7-81 is provided on the well wall 7-111 of the No. 1 shallow well heat exchange element at the top of the eighth water channel 7-8. The flowing water flows out through the eighth water channel outlet 7-81 and enters the water channels 7-9 of the No. 1 and No. 2 shallow well heat exchange elements. Through the first water channel inlet 7-121 of the No. 2 shallow well heat exchange element, it flows into the first water channel 7-12 of the No. 2 heat exchange well and officially enters the No. 2 shallow well heat exchange element. Similar to the water flow mode and heat exchange situation in the No. 1 shallow well heat exchange element, the flowing water finally flows out from the eighth water channel 7-13 of the No. 2 shallow well heat exchange element, enters the water channels 7-10 of the No. 2 and No. 3 shallow well heat exchange elements, enters the first water channel 7-14 of the No. 3 shallow well heat exchange element, and finally flows out from the eighth water channel 7-15 of the No. 3 shallow well heat exchange element. By analogy, the flowing water in the heat exchange well finally comes out from the innermost shallow well heat exchange element and then enters the water storage tank 2 through the water inlet pipe 13.

[0059] As Figure 6 and Figure 7As shown, a large number of conical structures 8 are arranged on the well wall of the shallow well heat exchanger 7. The conical structure 8 is hollow inside, with an open bottom communicating with the well water and a closed other end. The surface of the conical structure 8 is covered with cones 9. The conical structure 8 and the cones 9 significantly increase the area of the water channel, which is very beneficial to heat exchange. In addition, due to the conical structure 8 and the cones 9, when the flowing water passes through the water channel, the water flow is more likely to present a turbulent flow and a disturbance phenomenon, and small eddies are likely to appear, which can destroy part of the boundary layer of the fluid and further enhance the heat exchange between the flowing water and the soil or the well water.

[0060] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. An air conditioning system based on a shallow water heat exchange well, characterized in that, Comprising: A shallow well heat exchanger (7), which is arranged in a shallow well, and the outside of the shallow well heat exchanger (7) is in contact with the shallow well wall, and the inside of the shallow well heat exchanger (7) is in contact with water; A water storage tank (2) for storing the cooled circulating water. The water storage tank (2) is communicated with the shallow well heat exchanger (7) through a water inlet pipe (13). A coil pipe (3) and a temperature measuring element (4) are arranged inside the water storage tank (2). The coil pipe (3) is communicated with the outdoor unit of a household split air conditioner (1) and is used for further cooling the stored water in the water storage tank (2) by starting the outdoor unit; An indoor terminal heat exchanger (5) is communicated with the water storage tank (2) through a water outlet pipe (12) and a water pump (6). The indoor terminal heat exchanger (5) is communicated with the water storage tank (2) through a water storage tank return pipe (10). A first valve is arranged on the water storage tank return pipe (10). The indoor terminal heat exchanger (5) is also communicated with the shallow well heat exchanger (7) through a heat exchange well return pipe (11). A second valve is arranged on the heat exchange well return pipe (11). The output water after heat exchange between the indoor terminal heat exchanger (5) and the room air is circulated and cooled through the shallow well heat exchanger (7); When the return water temperature in the water storage tank return pipe (10) is lower than the well water temperature, the first valve opens and the second valve closes; when the return water temperature in the water storage tank return pipe (10) is higher than the well water temperature, the first valve closes and the second valve opens.

2. The air conditioning system based on a shallow water heat exchange well according to claim 1, wherein The shallow well heat exchanger (7) includes an annular hollow shell. The annular hollow shell is divided into a plurality of water channels vertically by a partition board. The first water channel is communicated with the indoor terminal heat exchanger (5) through a heat exchange well return pipe. Water passing holes are arranged on every two adjacent water channels. A water channel outlet is arranged on the last water channel of the shallow well heat exchanger (7) adjacent to the first water channel. The water channel outlet is communicated with the water storage tank (2) through a water inlet pipe (13).

3. The air-conditioning system based on a shallow water heat exchange well according to claim 2, characterized in that, The plurality of water passing holes opened on the plurality of water channels are sequentially communicated and arranged in a snake shape.

4. The air conditioning system based on a shallow water heat exchange well according to claim 2, characterized in that, The outer side wall of the annular hollow shell is attached to the well wall of the shallow well heat exchanger (7), and the inner side wall of the annular hollow shell is in contact with the well water.

5. The air conditioning system based on a shallow water heat exchange well according to claim 1, characterized in that, The shallow well heat exchanger (7) is a plurality of concentrically arranged annular hollow shells. The plurality of annular hollow shells are communicated with each other. The annular hollow shell farthest from the center of the circle is communicated with the water outlet of the indoor terminal heat exchanger (5) through a heat exchange well return pipe (11). The annular hollow shell closest to the center of the circle is communicated with the water storage tank (2) through a water inlet pipe (13).

6. The air-conditioning system based on a shallow water heat exchange well according to claim 5, characterized in that, A plurality of the annular hollow shells are each vertically separated into a plurality of water channels by a partition plate (14). The first water channel of the annular hollow shell farthest from the center of the circle is communicated with an indoor terminal heat exchanger (5) through a heat exchange well return pipe (11). Water passing holes are provided between every two adjacent water channels. The last water channel of the annular hollow shell farthest from the center of the circle is communicated with the first water channel of another adjacent annular hollow shell through a water channel outlet. Water passing holes are provided between every two adjacent water channels of this annular hollow shell. The last water channel of this annular hollow shell is communicated with the first water channel of another adjacent annular hollow shell through a water channel outlet. The plurality of annular hollow shells are connected in this connection manner until the water channel outlet of the last water channel of the annular hollow shell closest to the center of the circle is communicated with a water storage tank (2) through a water inlet pipe (13).

7. The air conditioning system based on a shallow water heat exchange well according to claim 6, wherein, The plurality of water passing holes opened on the plurality of water channels of each of the annular hollow shells are sequentially communicated and arranged in a serpentine shape after connection.

8. The air conditioning system based on a shallow water heat exchange well according to claim 7, characterized in that, A plurality of hollow conical structures (8) are provided on the inner wall of each water channel. The top of the conical structure (8) is sealed, the bottom of the conical structure (8) is open, and the top of the conical structure (8) is fixed on the inner wall of each water channel along the radial direction of the annular hollow shell.

9. The air conditioning system based on a shallow water heat exchange well according to claim 8, characterized in that, A plurality of cones (9) are evenly distributed on the peripheral wall of the conical structure (8).

10. The air conditioning system based on a shallow water heat exchange well according to claim 1, characterized in that, The shallow well heat exchange element (7) can also be communicated with an outdoor hanging unit through a heat exchange well outlet pipe, so as to exchange heat with an evaporator in the outdoor hanging unit, so that the heat after heat exchange is sent into the room through an indoor hanging unit. A third valve is provided on the heat exchange well outlet pipe.

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