Water supply piping system and air conditioning system

Abstract

This utility model discloses a water supply pipeline system and an air conditioning system, including a water supply unit. Multiple independent terminal devices are connected in parallel to a main pipeline connected to the water supply unit. The beginning and end of the main pipeline are respectively connected to different water inlets of the water supply unit. The main pipeline includes a nested first inner pipe and a first outer pipe, which are spaced apart to form a first annular cavity. Fluids flowing in the same or opposite directions pass through both the first annular cavity and the first inner pipe. This design prevents excessive temperature differences between the inlet water of the terminal devices located in the near and far regions of the main pipeline, thus avoiding overheating / cooling in the corresponding rooms. This ensures thermal comfort uniformity or comfort in the corresponding rooms and avoids energy waste.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a water supply pipeline system and an air conditioning system. Background Technology

[0002] As people's living standards improve, users have increasingly higher demands for air conditioning comfort. Currently, most large commercial building air conditioning systems, such as office buildings and shopping malls, typically use one or several main units to supply chilled and hot water to terminal devices (such as fan coil units and other air handling equipment) throughout the building from the same location. The number of terminal devices is large, and due to the building's characteristics, the chilled and hot water supply paths inevitably vary in length, sometimes by hundreds or even thousands of meters in large buildings. Although the pipes are protected by insulation layers, heat loss still occurs due to the large temperature difference between the inside and outside of the pipes. Furthermore, the water temperature output by the main unit is the preset temperature, while the inlet water temperature in rooms far from the main unit (remote areas) may reach ±3℃ or more of the preset temperature.

[0003] Therefore, under conditions of high indoor load (such as exceptionally hot / cold weather, or multiple sources of heat and moisture loss indoors), the set indoor temperature cannot be reached. The usual solution for this situation is to lower the main unit's water supply temperature (raise it during heating) to ensure that the terminal equipment in the remote area can operate normally. However, this can lead to excessively low / high water supply temperatures in the near-end area, easily causing over-dehumidification / temperature exceeding the standard, resulting in an imbalance in thermal comfort and wasted energy. Utility Model Content

[0004] This utility model provides a water supply pipeline system and an air conditioning system to solve the problems of thermal comfort imbalance and large energy waste in the near-end area caused by long-distance transmission and distribution in the existing air conditioning system.

[0005] The technical solution of this utility model is a water supply pipeline system, including a water supply host, and multiple independent terminal devices are connected in parallel on the main pipeline connected to the water supply host; the end and the beginning of the main pipeline are respectively connected to different water outlets of the water supply host.

[0006] The main pipeline includes a first inner pipe and a first outer pipe nested together. The first inner pipe and the first outer pipe are spaced apart and form a first annular cavity. Fluids in the same or opposite directions flow through the first annular cavity and the first inner pipe.

[0007] Furthermore, each of the terminal devices is equipped with an auxiliary pipe that communicates with the main pipe. The auxiliary pipe includes a nested second inner pipe and a second outer pipe. The second inner pipe and the second outer pipe are spaced apart and form a second annular cavity. The second annular cavity communicates with the first annular cavity. The second inner pipe communicates with the first inner pipe.

[0008] Furthermore, a first valve is provided in the second annular cavity, which is used to prevent fluid in the first annular cavity from flowing through the second annular cavity to the end device.

[0009] Furthermore, a second valve is provided inside the second inner tube, which is used to prevent the fluid in the first inner tube from flowing through the second inner tube to the terminal device.

[0010] Furthermore, a second support member is provided axially within the second annular cavity, and the two radial sides of the second support member are respectively connected to the outer wall of the second inner tube and the inner wall of the second outer tube.

[0011] Furthermore, the outer walls of both the first and second outer tubes are covered with an insulation layer.

[0012] Furthermore, a first support member is provided axially within the first annular cavity, and the two radial sides of the first support member are respectively connected to the outer wall of the first inner tube and the inner wall of the first outer tube.

[0013] Furthermore, the water supply unit is equipped with:

[0014] The inlet diverter includes a first inlet, a first outlet, a second outlet, and a third outlet;

[0015] The return diversion unit includes a fourth outlet, a second inlet, a third inlet, and a fourth inlet;

[0016] The first inlet is connected to the water supply port of the water supply unit, and the fourth outlet is connected to the return port of the water supply unit.

[0017] The first outlet is connected to the beginning of the first annular cavity, and the end of the first annular cavity is connected to the second inlet;

[0018] The second outlet and the fourth inlet are both connected to the beginning of the first inner tube, and the ends of the first inner tube are both connected to the third outlet and the third inlet;

[0019] The first outlet, second outlet, third outlet, third inlet, and fourth inlet are all equipped with control valves.

[0020] Furthermore, each of the terminal devices is provided with a temperature sensing component, which is used to detect the temperature of the fluid flowing into the terminal device.

[0021] This utility model also proposes an air conditioning system, which includes the water supply pipeline system described above.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] This invention prevents excessive temperature differences between the inlet water of terminal devices located in the near and far zones of the main pipeline when the water supply temperature of the main water supply unit changes. This avoids overheating / cooling in the rooms corresponding to the terminal devices, thus ensuring the uniformity or comfort of thermal comfort in the rooms corresponding to each terminal device and avoiding energy waste. Attached Figure Description

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects and not to describe a particular order.

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the water supply pipeline system proposed in this utility model, which is in a ring structure.

[0027] Figure 2 This is a cross-sectional view of the main pipeline proposed in this utility model;

[0028] Figure 3 This is a cross-sectional view of the auxiliary pipe proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the water supply unit controlling the fluid flow in the main pipeline according to the present invention.

[0030] Figure 5 This is a schematic diagram showing the flow direction of fluid counterflow in the water supply pipeline system proposed in this utility model;

[0031] Figure 6 This is a schematic diagram of the water supply pipeline system proposed in this utility model, which is in a non-ring structure.

[0032] Figure label:

[0033] 10. Water supply unit;

[0034] 11. Inlet Diverter; 111. First Inlet; 112. First Outlet; 113. Second Outlet; 114. Third Outlet;

[0035] 12. Return diverter; 121. Fourth outlet; 122. Second inlet; 123. Third inlet; 124. Fourth inlet;

[0036] 13. Control valve; 131. First control valve; 132. Second control valve; 133. Third control valve; 134. Fourth control valve; 135. Fifth control valve;

[0037] 20. Main pipe; 201. First inner pipe; 202. First outer pipe; 203. First annular cavity; 204. First support component; 205. Insulation layer;

[0038] 30. Terminal equipment;

[0039] 40. Auxiliary pipe; 401. Second inner pipe; 402. Second outer pipe; 403. Second annular cavity; 404. Second support component;

[0040] 50. First valve;

[0041] 60. Second valve;

[0042] 70. Temperature sensing component. Detailed Implementation

[0043] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present utility model, and does not imply that every embodiment of the present utility model must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0044] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0045] Currently, most large commercial building air conditioning systems typically use one or several main units to supply chilled and hot water to terminal devices throughout the building from the same location. Due to the large number of terminal devices and the inherent characteristics of the building, the chilled and hot water supply paths inevitably vary in length, sometimes by hundreds or even thousands of meters in large buildings. Although the pipes are protected by insulation layers, heat loss still occurs due to the large temperature difference between the inside and outside of the pipes. Furthermore, the water temperature output by the main unit is the preset temperature, while the inlet water temperature in the rooms furthest from the main unit (remote areas) may reach ±3°C or higher than the preset temperature.

[0046] Therefore, the set indoor temperature cannot be reached in rooms in the remote area. The usual solution for this situation is to lower the main unit's water supply temperature and raise it during heating to ensure that the terminal equipment in the remote area can operate normally. However, this will result in the water supply temperature in the near area being too low / high, which can easily lead to over-dehumidification / temperature exceeding the standard, resulting in an imbalance of thermal comfort and energy waste.

[0047] Therefore, to address the imbalance of thermal comfort and significant energy waste in the near-end region, such as... Figures 1-2 As shown, this utility model proposes a water supply pipeline system, including a water supply host 10, on which a plurality of independent terminal devices 30 are connected in parallel on a main pipeline 20 connected to the water supply host 10; the end and the beginning of the main pipeline 20 are respectively connected to different water outlets of the water supply host 10.

[0048] The main pipe 20 includes a first inner pipe 201 and a first outer pipe 202 that are coaxially nested. The first inner pipe 201 and the first outer pipe 202 are spaced apart and form a first annular cavity 203. Fluids in the same or opposite directions flow in both the first annular cavity 203 and the first inner pipe 201.

[0049] It should be noted that the fluid proposed in this embodiment is preferably water, and the water temperature flowing out of the water supply unit 10 is preferably 60°C during heating; the water temperature flowing out of the water supply unit 10 is preferably 7°C during cooling. Of course, other values ​​can be selected according to actual conditions, and are not limited here. The main pipe 20 proposed in this embodiment has a ring structure, and the beginning of the main pipe 20 is connected to one water supply port of the water supply unit 10, and the end is connected to another water return port of the water supply unit 10, so that the circulated water can return to the water supply unit 10 and then flow into the heat exchanger for heat exchange again. The water flowing out of the outlets of all terminal devices 30 is collected in the return pipe and then flows to the heat exchanger for heat exchange again. The water supply pipeline system proposed in this embodiment also includes a main control unit; the terminal device 30 is preferably a fan coil unit or a fan coil unit.

[0050] Thus, when the water supply system is in cooling mode, the following situations may occur:

[0051] ① The water supply temperature of the water supply host 10 is set to the first preset temperature T0 (preferably 7℃). First, water is supplied through the first external pipe 202, that is, the water supply of the water supply host 10 only flows into the first annular cavity 203. If the main control unit detects that the inlet water temperature of all terminal devices 30 is ≤T0+1℃, then the water supply pipeline system is normally operated by default and the status quo is maintained.

[0052] ② Under the conditions of ①, if the main control unit detects that the inlet water temperature of the terminal device 30 in the remote area is >T0+1℃ within a continuous specified time, the main control unit will supply water at the first preset temperature T0 to both the first inner pipe 201 and the first annular cavity 203. The water in the first inner pipe 201 and the water in the first outer pipe 202 are separated by only one layer of pipe material. The water temperature in the first annular cavity 203 rises due to the influence of the ambient temperature. At the same time, the water in the first inner pipe 201 will affect the water temperature in the first annular cavity 203, ensuring that the inlet water temperature of each terminal device 30 is ≤T0+1℃. At this time, the water in the first inner pipe 201 only affects the water temperature in the first annular cavity 203 and does not participate in the water supply.

[0053] ③ When situation ② cannot satisfy the requirement that the inlet water temperature of all terminal devices 30 in the open state is ≤T0+1℃, the terminal devices 30 with an inlet water temperature >T0+1℃ will only be supplied with water by the first inner pipe 201. The water in the first annular cavity 203 will no longer flow into the terminal devices 30 with an inlet water temperature >T0+1℃, and will only serve as insulation for the first inner pipe 201 to ensure that the inlet water temperature of the subsequent terminal devices 30 is ≤T0+1℃. If it is still not possible to guarantee that the inlet water temperature of all terminal devices 30 is ≤T0+1℃, the water supply temperature of the water supply host 10 will be reduced.

[0054] ④ When the water supply temperature cannot be guaranteed under situation ③ (before reducing the water supply temperature of the water supply unit 10), the water supply pipeline system will reverse the water supply (e.g., Figure 5 As shown in the diagram, the water in the first annular cavity 203 is supplied via the normal path, with the supply sequence being fan plate 1, fan plate 2, ..., fan plate N; the water in the first inner pipe 201 is supplied in the reverse direction, with the supply sequence being fan plate N, fan plate N-1, ..., fan plate 1; and the initial temperature of the water entering the first annular cavity 203 and the water entering the first inner pipe 201 is T0. Obviously, the insulation effect of the first inner pipe 201 is better, and the heat loss of the water in the first annular cavity 203 is greater. Therefore, the water in the terminal device 30 with an inlet water temperature > T0+1℃ is supplied only by the first inner pipe 201, and the water in the first annular cavity 203 no longer flows into the terminal device 30 with an inlet water temperature > T0+1℃, but only serves as insulation for the first inner pipe 201.

[0055] ⑤ If, in scenario ④, the water temperature in both the first inner pipe 201 and the first annular cavity 203 is greater than T0+1℃ at a certain position in the middle of the main pipe 20, then the water supply temperature of the water supply unit 10 is reduced so that the water temperature in both the first inner pipe 201 and the first annular cavity 203 is reduced to T0+1℃ or below. However, because the water flow directions in the first inner pipe 201 and the first annular cavity 203 are opposite (i.e., the water supply from the water supply unit 10 enters the first annular cavity 203 from the beginning of the main pipe 20, and at the same time, the water supply from the water supply unit 10 can also enter the first inner pipe 201 from the end of the main pipe 20; of course, it can also be the opposite, which is not limited here), the high-temperature water in the first annular cavity 203 at the end of the first outer pipe 202 can affect the low-temperature water at the end of the first inner pipe 201. The warm water acts as a neutralizer. The low-temperature water in the first annular cavity 203 at the beginning of the first outer pipe 202 neutralizes the high-temperature water at the beginning of the first inner pipe 201, thereby raising the initial water supply temperature at the end of the first inner pipe 201 and the beginning of the first outer pipe 202 (to a higher level than the reduced water supply temperature of the water supply host 10). In this way, even when the water supply temperature of the water supply host 10 decreases (<T0), the inlet water temperature of the terminal equipment 30 located in the near and far zones will not be too low, avoiding excessive cooling, which would lead to excessive condensation of moisture in the air and excessive dehumidification. This ensures that the inlet water temperature of each terminal equipment 30 on the main pipe 20 can be maintained between [T0, T0+1℃], thereby ensuring the thermal comfort uniformity or thermal comfort of the rooms corresponding to each terminal equipment 30 and avoiding energy waste.

[0056] Of course, when the water supply pipeline system is in heating mode, the following situations may occur:

[0057] ① The water supply temperature of the water supply host 10 is set to the second preset temperature T1 (preferably 60℃). First, water is supplied through the first external pipe 202, that is, the water supply of the water supply host 10 only flows into the first annular cavity 203. If the main control unit detects that the inlet water temperature of all terminal devices 30 is ≥T1-5℃, then the water supply pipeline system is normally operated by default and the status quo is maintained.

[0058] ② Under the conditions of ①, if the main control unit detects that the inlet water temperature of the terminal device 30 in the remote area is <T1-5℃ within a continuous specified time, then the main control unit will supply water at the second preset temperature T1 to both the first inner pipe 201 and the first annular cavity 203. The water in the first inner pipe 201 and the water in the first outer pipe 202 are separated by only one layer of pipe material. The water temperature in the first annular cavity 203 is affected by the ambient temperature and decreases. At the same time, the water in the first inner pipe 201 will affect the water temperature in the first annular cavity 203, ensuring that the inlet water temperature of each terminal device 30 is ≥T1-5℃. At this time, the water in the first inner pipe 201 only affects the water temperature in the first annular cavity 203 and does not participate in the water supply.

[0059] ③ When situation ② cannot satisfy the requirement that the inlet water temperature of all terminal devices 30 in the open state is ≥T1-5℃, the terminal devices 30 with an inlet water temperature <T1-5℃ will only be supplied with water by the first inner pipe 201. The water in the first annular cavity 203 will no longer flow into the terminal devices 30 with an inlet water temperature <T1-5℃, and will only serve as insulation for the first inner pipe 201 to ensure that the inlet water temperature of the subsequent terminal devices 30 is ≥T1-5℃. If it is still not possible to guarantee that the inlet water temperature of all terminal devices 30 is ≥T1-5℃, the water supply temperature of the water supply host 10 will be increased.

[0060] ④ When situation ③ (before raising the water supply temperature of the water supply host 10) cannot guarantee the water supply temperature, the water supply pipeline system supplies water in reverse. That is, the water in the first annular cavity 203 is supplied along the normal path, and the water supply sequence is fan coil 1, fan coil 2, ..., fan coil N; the water in the first inner pipe 201 is supplied in reverse, and the water supply sequence is fan coil N, fan coil N-1, ..., fan coil 1; and the initial temperature of the water entering the first annular cavity 203 and the water entering the first inner pipe 201 is T1. Obviously, the heat preservation effect of the first inner pipe 201 is better, and the heat loss of the water in the first annular cavity 203 is greater. Therefore, the terminal equipment 30 with an inlet water temperature <T1-5℃ is supplied with water only by the first inner pipe 201, and the water in the first annular cavity 203 no longer flows into the terminal equipment 30 with an inlet water temperature <T1-5℃, but only serves as the heat preservation function of the first inner pipe 201.

[0061] ⑤ If, in scenario ④, the water temperature in both the first inner pipe 201 and the first annular cavity 203 is <T1-5℃ at a certain position in the middle of the main pipe 20, then the water supply temperature of the water supply unit 10 is increased so that the water temperature in both the first inner pipe 201 and the first annular cavity 203 rises to T1-5℃ or higher. However, because the water flow directions in the first inner pipe 201 and the first annular cavity 203 are opposite (i.e., the water supply from the water supply unit 10 enters the first annular cavity 203 from the beginning of the main pipe 20, and at the same time, the water supply from the water supply unit 10 can also enter the first inner pipe 201 from the end of the main pipe 20; of course, it can also be the opposite, which is not limited here), the low-temperature water in the first annular cavity 203 at the end of the first outer pipe 202 can affect the first... The high-temperature water at the end of the inner pipe 201 acts as a neutralizer, and the high-temperature water in the first annular cavity 203 at the beginning of the first outer pipe 202 neutralizes the low-temperature water at the beginning of the first inner pipe 201, so that the initial water supply temperature at the end of the first inner pipe 201 and the beginning of the first outer pipe 202 decreases (below the water supply temperature after the water supply host 10 is raised). In this way, when the water supply temperature of the water supply host 10 is raised (>T1), the inlet water temperature of the terminal equipment 30 located in the near-end area and the far-end area will not be too high, avoiding the phenomenon of overheating. This ensures that the inlet water temperature of each terminal equipment 30 on the main pipe 20 can be maintained between [T1-5℃, T1], thereby ensuring the thermal comfort uniformity or thermal comfort of the room corresponding to each terminal equipment 30 and avoiding energy waste.

[0062] Of course, the water supply temperature of 7℃ / 60℃ proposed in this embodiment is a scheme under the standard operating conditions of cooling and heating. In actual application, the water supply temperature can be adjusted and set to 8℃ / 55℃ as needed, which is not limited here. Of course, it can also be represented by the difference ΔT. For example, if the water supply temperature of the water supply host 10 is T0, then the water inlet temperature of the terminal equipment 30 is guaranteed to be between T0 and (T0+ΔT).

[0063] Therefore, this utility model avoids the problem of excessive temperature difference between the inlet water of the terminal equipment 30 located in the near and far regions of the main pipeline 20 when the water supply temperature of the water supply host 10 changes by allowing the fluid in the first annular cavity 203 and the first inner pipe 201 to flow in opposite directions (countercurrent flow). This prevents the room corresponding to the terminal equipment 30 from experiencing excessive cooling / heating, thereby ensuring the uniformity or comfort of thermal comfort in the room corresponding to each terminal equipment 30 and avoiding energy waste.

[0064] In some embodiments, to ensure that the fluids in the first inner tube 201 and the first annular cavity 203 can flow to their respective end devices 30 without mixing, such as Figure 1 and Figure 3As shown, each of the terminal devices 30 is equipped with an auxiliary pipe 40 that communicates with the main pipe 20. The auxiliary pipe 40 includes a second inner pipe 401 and a second outer pipe 402 that are coaxially nested. The second inner pipe 401 and the second outer pipe 402 are spaced apart and form a second annular cavity 403. The second annular cavity 403 communicates with the first annular cavity 203. The second inner pipe 401 communicates with the first inner pipe 201.

[0065] Furthermore, to ensure that the water supply pipeline system can accurately control whether the fluid in the first annular cavity 203 flows into the terminal device 30, such as... Figure 1 As shown, a first valve 50 is provided inside the second annular cavity 403. The first valve 50 is used to prevent the fluid in the first annular cavity 203 from flowing through the second annular cavity 403 to the end device 30.

[0066] It should be noted that the first valve 50 proposed in this embodiment is preferably located at the junction of the second annular cavity 403 and the first annular cavity 203, so as to avoid the presence of fluid in the second annular cavity 403 when the first valve 50 is closed.

[0067] Furthermore, to ensure that the water supply pipeline system can accurately control whether the fluid in the first inner pipe 201 flows into the terminal device 30, such as... Figure 1 As shown, a second valve 60 is provided inside the second inner tube 401. The second valve 60 is used to prevent the fluid in the first inner tube 201 from flowing through the second inner tube 401 to the terminal device 30.

[0068] It should be noted that the second valve 60 proposed in this embodiment is preferably located at the junction of the second inner tube 401 and the first inner tube 201, so as to avoid the presence of fluid in the first inner tube 201 when the second valve 60 is closed.

[0069] In other embodiments (not shown in the figures), each terminal device 30 can also be connected to the corresponding first inner tube 201 and first annular cavity 203 through a pipe, and a first valve 50 is provided on one pipe and a second valve 60 is provided on the other pipe.

[0070] In some embodiments, to ensure the structural stability of the main pipeline 20, avoid local stress exceeding limits leading to rupture of the main pipeline 20, prevent damage to the main pipeline 20 due to thermal displacement, and extend the service life of the main pipeline 20, such as... Figure 2 As shown, a first support member 204 is provided axially inside the first annular cavity 203. The first support member 204 is connected to the outer wall of the first inner tube 201 and the inner wall of the first outer tube 202 on both sides radially.

[0071] In some embodiments, to ensure the structural stability of the auxiliary pipe 40, prevent local stress from exceeding limits and causing the auxiliary pipe 40 to crack, prevent the auxiliary pipe 40 from being damaged due to thermal displacement, and extend the service life of the auxiliary pipe 40, such as... Figure 3 As shown, a second support member 404 is provided axially inside the second annular cavity 403. The two sides of the second support member 404 are respectively connected to the outer wall of the second inner tube 401 and the inner wall of the second outer tube 402 along the radial direction.

[0072] It is understood that the first support member 204 and the second support member 404 can be continuously arranged or spaced apart along the axial direction, and this is not limited here. Of course, other support structures can also be arranged between the first inner pipe 201 and the first outer pipe 202 to maintain the stability of the main pipe 20; other support structures can also be arranged between the second inner pipe 401 and the second outer pipe 402 to maintain the stability of the auxiliary pipe 40, and this is not limited here.

[0073] In some embodiments, to further improve the thermal insulation performance of the main pipe 20, such as Figures 2-3 As shown, the outer walls of the first outer tube 202 and the second outer tube 402 are both covered with a heat insulation layer 205.

[0074] It should be noted that both the first outer tube 202 and the second outer tube 402 are made of thermal insulation material, and both the first inner tube 201 and the second inner tube 401 are made of heat-conducting material.

[0075] In some embodiments, to enable the main control unit to detect the inlet water temperature of the corresponding terminal device 30 in real time, such as Figure 1 As shown, each of the terminal devices 30 is provided with a temperature sensing component 70, which is used to detect the temperature of the fluid flowing into the terminal device 30.

[0076] It should be noted that the temperature sensing component 70 proposed in this embodiment is preferably a temperature sensor.

[0077] In some embodiments, such as Figure 4 As shown, the water supply unit 10 is equipped with:

[0078] The inlet diverter 11 includes a first inlet 111, a first outlet 112, a second outlet 113, and a third outlet 114;

[0079] The return diverter 12 includes a fourth outlet 121, a second inlet 122, a third inlet 123, and a fourth inlet 124;

[0080] The first inlet 111 is connected to the water supply port of the water supply host 10, and the fourth outlet 121 is connected to the return port of the water supply host 10.

[0081] The first outlet 112 is connected to the beginning of the first annular cavity 203, and the end of the first annular cavity 203 is connected to the second inlet 122.

[0082] The second outlet 113 and the fourth inlet 124 are both connected to the beginning of the first inner tube 201, and the end of the first inner tube 201 is connected to the third outlet 114 and the third inlet 123.

[0083] The first outlet 112, the second outlet 113, the third outlet 114, the third inlet 123 and the fourth inlet 124 are all equipped with control valves 13.

[0084] It should be noted that the control valve 13 includes a first control valve 131, a second control valve 132, a third control valve 133, a fourth control valve 134, and a fifth control valve 135; and the first control valve 131 is adapted to be installed on the first outlet 112, the second control valve 132 is adapted to be installed on the second outlet 113, the third control valve 133 is adapted to be installed on the third outlet 114, the fourth control valve 134 is adapted to be installed on the fourth inlet 124, and the fifth control valve 135 is adapted to be installed on the third outlet 114.

[0085] Thus, the water circuit control within the water supply unit 10 is as follows:

[0086] ① When the water supply pipeline system is supplied with water only by the first outer pipe 202, the main control unit opens the first control valve 131 and closes the second control valve 132, the third control valve 133, the fourth control valve 134 and the fifth control valve 135 so that the first inner pipe 201 is not supplied with water. At this time, the water supplied by the water supply host 10 flows into the inlet diverter 11 and then into the first annular cavity 203.

[0087] ② When the water in the first inner pipe 201 and the first outer pipe 202 in the water supply pipeline system flows in the same direction, the main control unit opens the first control valve 131, the second control valve 132 and the fifth control valve 135, and closes the third control valve 133 and the fourth control valve 134. At this time, the water supply route of the water supply host 10 is: water supply port of water supply host 10 → inlet diverter 11 → first inner pipe 201 and first annular cavity 203 → return diverter 12 → return port of water supply host 10.

[0088] ③ When the water in the first inner pipe 201 and the first outer pipe 202 of the water supply pipeline system flows in opposite directions (e.g.) Figure 5As shown, when the main control unit opens the first control valve 131, the third control valve 133 and the fourth control valve 134, and closes the second control valve 132 and the fifth control valve 135, the water supply route of the water supply host 10 is as follows: water supply port of water supply host 10 → inlet diverter 11 → beginning of the first annular cavity 203 → end of the first annular cavity 203 → return diverter 12 → return port of water supply host 10, and water supply port of water supply host 10 → inlet diverter 11 → end of the first inner pipe 201 → beginning of the first inner pipe 201 → return diverter 12 → return port of water supply host 10.

[0089] Therefore, this embodiment can use the above three control methods to make the fluid in the first annular cavity 203 and the first inner pipe 201 flow in the same or opposite directions according to the actual situation, so as to avoid the problem of excessive temperature difference between the inlet water of the terminal equipment 30 located in the near and far areas of the main pipe 20, thus preventing the room corresponding to the terminal equipment 30 from experiencing excessive cooling / heating, thereby ensuring the thermal comfort uniformity or thermal comfort of the room corresponding to each terminal equipment 30 and avoiding energy waste.

[0090] Of course, in other embodiments, such as Figure 6 As shown, if the water supply unit 10 is connected to the main pipe 20 through only one water outlet (i.e., the main pipe 20 is a non-ring structure), and multiple independent terminal devices 30 are connected in parallel on the main pipe 20, the fluids flowing out of the outlets of the main pipe 20 and all the terminal devices 30 are collected in the return water pipe and then sent to the heat exchanger for reheating; at this time, when the water supply pipeline system is in cooling or heating mode, only scenarios ①②③ can be realized, and scenarios ④⑤ can only be realized by the main pipe 20 which is in a ring structure.

[0091] In some embodiments, the present invention also provides an air conditioning system, which includes the water supply pipeline system described above.

[0092] Therefore, this utility model avoids the problem of excessive temperature difference between the inlet water of the terminal equipment 30 located in the near and far regions of the main pipeline 20 when the water supply temperature of the water supply host 10 changes by allowing the fluid in the first annular cavity 203 and the first inner pipe 201 to flow in opposite directions (countercurrent flow). This prevents the room corresponding to the terminal equipment 30 from experiencing excessive cooling / heating, thereby ensuring the uniformity or comfort of thermal comfort in the room corresponding to each terminal equipment 30 and avoiding energy waste.

[0093] Specifically, this embodiment proposes the following flow of the air conditioning system under different operating conditions:

[0094] I. When the air conditioning system is in cooling mode, the following situations may occur:

[0095] ① The water supply temperature of the water supply unit 10 is set to the first preset temperature T0 (preferably 7℃). First, the main control unit opens the first control valve 131 and closes the second control valve 132, the third control valve 133, the fourth control valve 134 and the fifth control valve 135. Water is supplied only by the first external pipe 202, that is, the water supply of the water supply unit 10 flows only into the first annular cavity 203. Then, the main control unit opens the corresponding first valve 50 so that the water supply flows into the corresponding terminal device 30. If the main control unit detects that the inlet water temperature of all opened terminal devices 30 is ≤T0+1℃, then the water supply pipeline system is assumed to be operating normally and the status quo is maintained.

[0096] ② Under the conditions of scenario ①, if the main control unit detects that the inlet water temperature of the terminal device 30 in the remote area is >T0+1℃ within a continuous specified time, then the main control unit will open the first control valve 131, the second control valve 132 and the fifth control valve 135, and close the third control valve 133 and the fourth control valve 134, so that the first inner pipe 201 and the first annular cavity 203 supply water at the first preset temperature T0 together. The water in the first inner pipe 201 and the water in the first outer pipe 202 are separated by only one layer of pipe material. The water temperature in the first annular cavity 203 rises due to the influence of the ambient temperature. At the same time, the water in the first inner pipe 201 affects the water temperature in the first annular cavity 203, ensuring that the inlet water temperature of each terminal device 30 is ≤T0+1℃. At this time, all second valves 60 are closed, and the water in the first inner pipe 201 only affects the water temperature in the first annular cavity 203 and does not participate in the water supply.

[0097] ③ When situation ② cannot satisfy the requirement that the inlet water temperature of all terminal devices 30 in the open state is ≤T0+1℃, the main control unit opens the second valve 60 corresponding to the terminal device 30 with an inlet water temperature >T0+1℃ and closes the corresponding first valve 50, so that the terminal device 30 with an inlet water temperature >T0+1℃ is supplied with water only by the first inner pipe 201, and the water in the first annular cavity 203 no longer flows into the terminal device 30 with an inlet water temperature >T0+1℃, but only serves to keep the first inner pipe 201 warm, ensuring that the inlet water temperature of the subsequent terminal devices 30 is ≤T0+1℃. If it is still not possible to guarantee that the inlet water temperature of all terminal devices 30 is ≤T0+1℃, then the water supply temperature of the water supply host 10 is reduced.

[0098] ④ When situation ③ (before lowering the water supply temperature of the main water supply unit 10) cannot guarantee the water supply temperature, the main control unit opens the first control valve 131, the third control valve 133, and the fourth control valve 134, and closes the second control valve 132 and the fifth control valve 135, so that the water supply pipeline system supplies water in reverse. That is, the water in the first annular cavity 203 is supplied along the normal path, and the water supply sequence is fan coil 1, fan coil 2, ..., fan coil N; the water in the first inner pipe 201 is supplied in reverse, and the water supply sequence is fan coil N, fan coil N-1, ... 1. The initial temperature of the water entering the first annular cavity 203 and the water entering the first inner pipe 201 is T0. Obviously, the insulation effect of the first inner pipe 201 is better, and the heat loss of the water in the first annular cavity 203 is greater. Therefore, the first valve 50 corresponding to the terminal device 30 with an inlet water temperature > T0+1℃ is closed, and the second valve 60 is opened. That is, only the first inner pipe 201 supplies water, and the water in the first annular cavity 203 no longer flows into the terminal device 30 with an inlet water temperature > T0+1℃. It only serves to insulate the first inner pipe 201.

[0099] ⑤ If, in scenario ④, the water temperature in both the first inner pipe 201 and the first annular cavity 203 is greater than T0+1℃ at a certain position in the middle of the main pipe 20, then the water supply temperature of the water supply unit 10 is reduced so that the water temperature in both the first inner pipe 201 and the first annular cavity 203 is reduced to T0+1℃ or below. However, because the water in the first inner pipe 201 and the water in the first annular cavity 203 flow in opposite directions, the high-temperature water in the first annular cavity 203 at the end of the first outer pipe 202 can neutralize the low-temperature water at the end of the first inner pipe 201, and the low-temperature water in the first annular cavity 203 at the beginning of the first outer pipe 202 can neutralize the low-temperature water in the first inner pipe 201. The high-temperature water at the beginning acts as a neutralizer, causing the initial water supply temperature at the end of the first inner pipe 201 and the beginning of the first outer pipe 202 to rise (greater than the water supply temperature after the water supply host 10 is reduced). In this way, even when the water supply temperature of the water supply host 10 decreases (<T0), the inlet water temperature of the terminal equipment 30 located in the near and far zones will not be too low, avoiding excessive cooling, which would lead to excessive condensation of moisture in the air and excessive dehumidification. This ensures that the inlet water temperature of each terminal equipment 30 on the main pipe 20 can be maintained between [T0, T0+1℃], thereby ensuring the thermal comfort uniformity or thermal comfort of the rooms corresponding to each terminal equipment 30 and avoiding energy waste.

[0100] II. When the air conditioning system is in heating mode, the following situations may occur:

[0101] ① The water supply temperature of the water supply unit 10 is set to the second preset temperature T1 (preferably 60℃). First, the main control unit opens the first control valve 131 and closes the second control valve 132, the third control valve 133, the fourth control valve 134 and the fifth control valve 135. Water is supplied only by the first external pipe 202, that is, the water supply from the water supply unit 10 flows only into the first annular cavity 203. Then, the main control unit opens the corresponding first valve 50 so that the water supply flows into the corresponding terminal device 30. If the main control unit detects that the inlet water temperature of all terminal devices 30 is ≥T1-5℃, then the water supply pipeline system is assumed to be operating normally and the status quo is maintained.

[0102] ② Under the conditions of ①, if the main control unit detects that the inlet water temperature of the terminal device 30 in the remote area is <T1-5℃ within a continuous specified time, then the main control unit will open the first control valve 131, the second control valve 132 and the fifth control valve 135, and close the third control valve 133 and the fourth control valve 134, so that the first inner pipe 201 and the first annular cavity 203 supply water at the second preset temperature T1 together. The water in the first inner pipe 201 and the water in the first outer pipe 202 are separated by only one layer of pipe material. The water temperature in the first annular cavity 203 is affected by the ambient temperature and decreases. At the same time, the water in the first inner pipe 201 will affect the water temperature in the first annular cavity 203, ensuring that the inlet water temperature of each terminal device 30 is ≥T1-5℃. At this time, all second valves 60 are closed, and the water in the first inner pipe 201 only affects the water temperature in the first annular cavity 203 and does not participate in the water supply.

[0103] ③ When situation ② cannot satisfy the requirement that the inlet water temperature of all terminal devices 30 in the open state is ≥T1-5℃, the main control unit opens the second valve 60 corresponding to the terminal device 30 with an inlet water temperature <T1-5℃ and closes the corresponding first valve 50, so that the terminal device 30 with an inlet water temperature <T1-5℃ is supplied with water only by the first inner pipe 201, and the water in the first annular cavity 203 no longer flows into the terminal device 30 with an inlet water temperature <T1-5℃, but only serves as insulation for the first inner pipe 201, ensuring that the inlet water temperature of the subsequent terminal devices 30 is ≥T1-5℃. If it is still not possible to guarantee that the inlet water temperature of all terminal devices 30 is ≥T1-5℃, the water supply temperature of the water supply host 10 is increased.

[0104] ④ When the water supply temperature cannot be guaranteed under situation ③ (before raising the water supply temperature of the main water supply unit 10), the main control unit opens the first control valve 131, the third control valve 133, and the fourth control valve 134, and closes the second control valve 132 and the fifth control valve 135, so that the water supply pipeline system supplies water in reverse. That is, the water in the first annular cavity 203 is supplied along the normal path, and the water supply sequence is fan coil 1, fan coil 2, ..., fan coil N; the water in the first inner pipe 201 is supplied in reverse, and the water supply sequence is fan coil N, fan coil N-1, ... 1. The initial temperature of the water entering the first annular cavity 203 and the water entering the first inner pipe 201 is T1. Obviously, the insulation effect of the first inner pipe 201 is better, and the heat loss of the water in the first annular cavity 203 is greater. Therefore, the first valve 50 corresponding to the terminal device 30 with an inlet water temperature <T1-5℃ is closed, and the second valve 60 is opened. That is, only the first inner pipe 201 supplies water, and the water in the first annular cavity 203 no longer flows into the terminal device 30 with an inlet water temperature <T1-5℃, but only serves to insulate the first inner pipe 201.

[0105] ⑤ If, in scenario ④, the water temperature in both the first inner pipe 201 and the first annular cavity 203 is <T1-5℃ at a certain position in the middle of the main pipe 20, then the water supply temperature of the water supply unit 10 is increased so that the water temperature in both the first inner pipe 201 and the first annular cavity 203 rises to T1-5℃ or higher. However, because the water in the first inner pipe 201 and the water in the first annular cavity 203 flow in opposite directions, the low-temperature water in the first annular cavity 203 at the end of the first outer pipe 202 can neutralize the high-temperature water at the end of the first inner pipe 201, and the high-temperature water in the first annular cavity 203 at the beginning of the first outer pipe 202... Water can neutralize the low-temperature water at the beginning of the first inner pipe 201, so that the initial water supply temperature at the end of the first inner pipe 201 and the beginning of the first outer pipe 202 decreases (below the water supply temperature after the water supply host 10 is raised). In this way, when the water supply temperature of the water supply host 10 rises (>T1), the inlet water temperature of the terminal equipment 30 located in the near-end area and the far-end area will not be too high, avoiding the phenomenon of overheating. This ensures that the inlet water temperature of each terminal equipment 30 on the main pipe 20 can be maintained between [T1-5℃, T1], thereby ensuring the thermal comfort uniformity or thermal comfort of the room corresponding to each terminal equipment 30 and avoiding energy waste.

[0106] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A water supply pipeline system, comprising a water supply unit (10), wherein a plurality of independent terminal devices (30) are connected in parallel to a main pipeline (20) to which the water supply unit (10) is connected; characterized in that, The end and beginning of the main pipe (20) are respectively connected to different water inlets of the water supply host (10); The main pipe (20) includes a first inner pipe (201) and a first outer pipe (202) nested together. The first inner pipe (201) and the first outer pipe (202) are spaced apart and form a first annular cavity (203). Fluids in the same or opposite directions flow in both the first annular cavity (203) and the first inner pipe (201).

2. The water supply pipeline system according to claim 1, characterized in that, Each of the terminal devices (30) is equipped with an auxiliary pipe (40) that communicates with the main pipe (20). The auxiliary pipe (40) includes a second inner pipe (401) and a second outer pipe (402) nested together. The second inner pipe (401) and the second outer pipe (402) are spaced apart and form a second annular cavity (403). The second annular cavity (403) communicates with the first annular cavity (203). The second inner pipe (401) communicates with the first inner pipe (201).

3. The water supply pipeline system according to claim 2, characterized in that, The second annular cavity (403) is provided with a first valve (50), which is used to block the fluid in the first annular cavity (203) from flowing through the second annular cavity (403) to the terminal device (30).

4. The water supply pipeline system according to claim 2, characterized in that, The second inner tube (401) is provided with a second valve (60), which is used to block the fluid in the first inner tube (201) from flowing through the second inner tube (401) to the terminal device (30).

5. The water supply pipeline system according to claim 2, characterized in that, The second annular cavity (403) is provided with a second support member (404) along the axial direction. The second support member (404) is connected to the outer wall of the second inner tube (401) and the inner wall of the second outer tube (402) on both sides along the radial direction.

6. The water supply pipeline system according to claim 2, characterized in that, The outer walls of the first outer tube (202) and the second outer tube (402) are both covered with a heat insulation layer (205).

7. The water supply pipeline system according to claim 1, characterized in that, The first annular cavity (203) is provided with a first support member (204) along the axial direction. The first support member (204) is connected to the outer wall of the first inner tube (201) and the inner wall of the first outer tube (202) on both sides along the radial direction.

8. The water supply pipeline system according to claim 1, characterized in that, The water supply unit (10) is equipped with: The inlet diverter (11) includes a first inlet (111), a first outlet (112), a second outlet (113) and a third outlet (114); The return diverter (12) includes a fourth outlet (121), a second inlet (122), a third inlet (123) and a fourth inlet (124); The first inlet (111) is connected to the water supply port of the water supply host (10), and the fourth outlet (121) is connected to the return port of the water supply host (10). The first outlet (112) is connected to the beginning of the first annular cavity (203), and the end of the first annular cavity (203) is connected to the second inlet (122); The second outlet (113) and the fourth inlet (124) are both connected to the beginning of the first inner tube (201), and the end of the first inner tube (201) is connected to the third outlet (114) and the third inlet (123); The first outlet (112), the second outlet (113), the third outlet (114), the third inlet (123), and the fourth inlet (124) are all equipped with control valves (13).

9. The water supply pipeline system according to claim 1, characterized in that, Each of the terminal devices (30) is provided with a temperature sensing component (70) for detecting the temperature of the fluid flowing into the terminal device (30).

10. An air conditioning system, characterized in that, The air conditioning system includes the water supply pipeline system as described in any one of claims 1 to 9.

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