A cold storage tank water distributor structure and a cold storage tank system

Abstract

The application relates to a cold storage tank water distributor structure and a cold storage tank system. The cold storage tank water distributor structure comprises an overflow pipe, a blow-off port, an upper water distributor with lateral water outlet, a cold storage tank hot end main pipe, a lower water distributor with lateral water outlet and a cold storage tank cold end main pipe. The overflow pipe and the blow-off port are respectively arranged in communication with the cold storage tank. The upper water distributor is arranged in the cold storage tank in a floating mode and located at the upper part of the cold storage tank. The lower water distributor is arranged in the cold storage tank in a fixed mode and located at the lower part of the cold storage tank. One end of the cold storage tank hot end main pipe is arranged in communication with the upper water distributor. One end of the cold storage tank cold end main pipe is arranged in communication with the lower water distributor. The upper water distributor is arranged in a floating mode, can float with the change of the liquid level, absorbs the displacement caused by the liquid level difference or temperature expansion, ensures the stable operation of the system, the upper water distributor and the lower water distributor respectively have lateral water outlet, significantly reduces the liquid surface disturbance, maintains the cold and hot stratification of the tank body, and has the advantages of hydraulic stability, uniform water distribution, energy saving and high efficiency.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, and in particular to a cold storage tank water distributor structure and a cold storage tank system. Background Technology

[0002] In recent years, with the rapid development of urban construction and the service industry, the number of large public buildings and complexes has been increasing, and the installed capacity of central air conditioning systems has also expanded accordingly. Air conditioning systems put significant pressure on the power grid during peak electricity consumption periods, accounting for a high proportion of peak loads, and have become a major factor restricting the safe operation of the power grid and the improvement of energy efficiency.

[0003] Water-cooled air conditioning systems, as an energy-saving technology for peak shaving and valley filling, have been widely used in engineering practice. This system stores cooling capacity during off-peak electricity hours at night and releases it during peak daytime hours to provide air conditioning load for buildings, thus reducing operating costs and improving the stability of the power system.

[0004] In existing projects, multiple water-cooled storage tanks are often connected to the pipeline network in parallel. However, due to differences in construction conditions and installation height, the heights of the hot-end pipes and overflow ports of different storage tanks are not consistent. During system operation, due to the influence of pipeline connectivity, some storage tanks may overflow due to excessively high water levels, while others may be unable to pump water due to excessively low water levels, resulting in the inability to store and release cold water normally. This phenomenon of "partial overflow and partial water shortage" leads to a waste of cooling capacity and may even affect the stable operation of the entire system. In addition, traditional water distributors often use a vertical downward water discharge method at the end, with the water flow directly impacting the water in the tank, forming a strong jet that disrupts the stratification of hot and cold water within the tank, leading to a thickening of the thermocline and a reduction in effective cooling capacity. When the system operating pressure fluctuates, fixed overflow ports and rigid water distributors are also difficult to adapt to, often causing frequent overflows and local disturbances, further exacerbating the stratification disruption.

[0005] Therefore, there is an urgent need for a structure that can adapt to changes in liquid level, maintain hydraulic stability of the system, and achieve uniform water output at the end of the water distributor, so as to improve the water level coordination between cold storage tanks, reduce the risk of overflow, and improve the overall cold storage and release efficiency of the system. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a cold storage tank water distributor structure and a cold storage tank system, which addresses the shortcomings of the prior art.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A cold storage tank water distributor structure includes an overflow pipe, a drain outlet, an upper water distributor with side-discharge, a hot end main pipe of the cold storage tank, a lower water distributor with side-discharge, and a cold end main pipe of the cold storage tank. The overflow pipe and the drain outlet are respectively connected to the cold storage tank. The upper water distributor is floatingly installed inside the cold storage tank and located at the upper part of the cold storage tank. The lower water distributor is fixedly installed inside the cold storage tank and located at the lower part of the cold storage tank. The hot end main pipe and the cold end main pipe of the cold storage tank are respectively installed between the upper water distributor and the lower water distributor. One end of the hot end main pipe of the cold storage tank is connected to the upper water distributor, and the other end of the hot end main pipe of the cold storage tank extends to the outside of the cold storage tank and is connected to the chilled water return pipe. One end of the cold end main pipe of the cold storage tank is connected to the lower water distributor, and the other end of the cold end main pipe of the cold storage tank extends to the outside of the cold storage tank and is connected to the chilled water supply pipe.

[0008] The beneficial effects of this invention are as follows: The water distributor structure of the cold storage tank of this invention, by setting the floating upper water distributor, can float with the liquid level changes and always remain below the liquid surface, avoiding air entrainment, eliminating cavitation, absorbing displacement caused by liquid level difference or temperature expansion, and ensuring stable system operation. At the same time, the upper and lower water distributors respectively discharge water laterally, significantly reducing liquid surface disturbance and maintaining the cold and hot stratification of the tank. It effectively solves the problems of inconsistent liquid levels in multi-tank systems and the destruction of stratification by traditional vertical water discharge, and has the advantages of hydraulic stability, uniform water distribution, energy saving and high efficiency.

[0009] Based on the above technical solution, the present invention can be further improved as follows:

[0010] Furthermore, both the upper and lower water distributors are disc structures with built-in cavities, and the upper water distributor can automatically adjust its position up and down as the liquid level in the cold storage tank changes.

[0011] The beneficial effect of the above-mentioned further solution is that by setting a disc structure with a built-in cavity, the upper water distributor and the lower water distributor can form a large-diameter closed water distribution unit, and ensure that the entire water distributor has a certain buoyancy.

[0012] Furthermore: Both the upper and lower water distributors include an upper water distributor cavity plate, a side water distributor cavity plate, and a lower water distributor cavity plate. The side water distributor cavity plate is disposed between the upper and lower water distributor cavity plates, forming a disc structure with an internal cavity. The disc structure is connected to one end of the corresponding hot end main pipe or cold end main pipe of the cold storage tank. The surface of the lower water distributor cavity plate or the upper water distributor cavity plate is provided with multiple water distribution ends, and the side wall of each water distribution end is provided with a water distributor outlet hole.

[0013] The beneficial effect of the above-mentioned further solution is that by setting the upper plate, the side plate, and the lower plate of the water distributor cavity, an internal cavity can be formed inside the upper and lower water distributors. The cavity disc has a certain buoyancy, which allows the water distributor to maintain balance in the water and float automatically with changes in liquid level.

[0014] Furthermore, the disc structure is divided into multiple interconnected annular regions of equal area, and each annular region has an equal volume. The water distribution ends of each annular region on the lower plate or upper plate of the water distributor cavity are equal.

[0015] The beneficial effects of the above-mentioned further solution are as follows: by dividing the disc structure into multiple interconnected and equal-area annular regions, and uniformly arranging the same number of water distribution terminals on each annulus, each water distribution terminal is responsible for the water distribution task of the corresponding annular region. This ensures that the flow distribution of each region is balanced and avoids local flow concentration, thereby making the hydraulic distribution in the cold storage tank more uniform and the stratification more stable.

[0016] Further: the number of water distribution terminals corresponding to each of the aforementioned annular regions. The calculation formula is:

[0017]

[0018]

[0019]

[0020]

[0021]

[0022] in, This represents the total number of water distribution structures. The volume ratio of each annular region, The number of water distribution terminals in the j-th annular region floating-point numbers, This represents the number of annular regions. for The integer obtained by rounding down. for The remainder after rounding down. for The number of excess water distribution terminals after rounding up the number of annular areas, and the number after rounding up. The number of excess water distribution terminals is based on The water distribution terminals are assigned to the corresponding annular regions from largest to smallest, and the number of terminals corresponding to each annular region is finally obtained. .

[0023] Furthermore, the volume of the water distribution end is 3-5 times the flow rate of the water distributor outlet.

[0024] Further: the diameter of the water outlet hole of the water distributor Determine by the following formula:

[0025]

[0026] in, The total design flow rate of the water distributor. The desired water velocity per orifice of the water distributor. The number of water outlet holes of the water distributor.

[0027] The beneficial effect of the above-mentioned further solution is that by determining the orifice diameter of the water distributor through this formula, the flow velocity of each orifice can be made consistent, thus ensuring uniform water distribution.

[0028] Furthermore, the structure of the cold storage tank water distributor also includes a retractable flexible connecting pipe. One end of the hot end main pipe of the cold storage tank is connected to the upper water distributor via the flexible connecting pipe. When the upper water distributor automatically adjusts its position up and down as the liquid level in the cold storage tank changes, it can drive the flexible connecting pipe to extend and retract.

[0029] The beneficial effects of the above-mentioned further solution are: by setting the flexible connecting pipe, displacement caused by liquid level difference or temperature expansion can be absorbed, so that it can automatically compensate for height difference when the liquid levels of each cold storage tank are inconsistent, realizing the dual buffer of hydraulics and structure, and avoiding stress concentration and cavitation phenomenon, thereby maintaining the stable operation of the water distributor.

[0030] Further: the minimum expansion / contraction of the flexible connecting tube. The calculation formula is:

[0031]

[0032]

[0033]

[0034] in, This is the expansion amount of the cold storage tank. The surface area of ​​the cold storage tank. The coefficient of thermal expansion of chilled water is denoted as . For the volume of the cold storage tank, The density of the chilled water before cooling. This is the density of the chilled water after cooling.

[0035] The beneficial effect of the above further solution is that it allows for the calculation of the minimum expansion and contraction of the flexible connector using the above formula. This allows us to determine the required expansion and contraction compensation range for the flexible connector, ensuring the long-term safe and reliable operation of the system.

[0036] The present invention also discloses a cold storage tank system, including multiple cold storage tank water distributor structures, wherein the hot end main pipe and the cold end main pipe of the multiple cold storage tank water distributor structures are respectively connected to the chilled water return pipe and the chilled water supply pipe.

[0037] The cold storage tank system of the present invention connects multiple cold storage tanks in parallel to the same pipeline network. Due to differences in installation elevation, construction deviation and operating conditions, there may be differences in the liquid level of the tanks. The present invention achieves automatic compensation between the tanks through flexible soft connection, so that the water distributor can adaptively adjust with the liquid level and avoid uneven pressure or overflow between the tanks. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of a cold storage tank water distributor according to an embodiment of the present invention;

[0039] Figure 2 This is a cross-sectional structural schematic diagram of the upper water distributor according to an embodiment of the present invention;

[0040] Figure 3 This is a cross-sectional structural schematic diagram of the lower water distributor according to an embodiment of the present invention;

[0041] Figure 4 This is a bottom view of the upper water distributor according to an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of a cold storage tank system according to an embodiment of the present invention.

[0043] The following is a list of components represented by each label in the attached diagram:

[0044] 1. Overflow pipe, 2. Drain outlet, 3. Flexible connection pipe, 4. Upper water distributor, 4-1. Upper water distributor cavity upper plate, 4-2. Upper water distributor cavity side plate, 4-3. Upper water distributor cavity lower plate, 4-4. Upper water distributor end, 4-5. Upper water distributor end outlet hole, 5. Cold storage tank hot end main pipe, 6. Cold storage tank hot end extension pipe, 7. Blind flange, 8. Lower water distributor, 8-1. Lower water distributor cavity upper plate, 8-2. Lower water distributor cavity side plate, 8-3. Lower water distributor cavity lower plate, 8-4. Lower water distributor end, 8-5. Lower water distributor end outlet hole, 9. Cold storage tank cold end main pipe, 10. Cold storage tank cold end extension pipe. Detailed Implementation

[0045] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0046] like Figures 1 to 4 As shown, a cold storage tank water distributor structure includes an overflow pipe 1, a drain outlet 2, an upper water distributor 4 for side-discharge, a hot-end main pipe of the cold storage tank, a lower water distributor 8 for side-discharge, and a cold-end main pipe of the cold storage tank. The overflow pipe 1 and the drain outlet 2 are respectively connected to the cold storage tank. The upper water distributor 4 is floatingly installed inside the cold storage tank and located at the top of the cold storage tank. The lower water distributor 8 is fixedly installed inside the cold storage tank and located at the bottom of the cold storage tank. The hot-end main pipe and the cold-end main pipe of the cold storage tank are respectively installed between the upper water distributor 4 and the lower water distributor 8. One end of the hot-end main pipe of the cold storage tank is connected to the upper water distributor 4, and the other end of the hot-end main pipe of the cold storage tank extends outside the cold storage tank and is connected to the chilled water return pipe. One end of the cold-end main pipe of the cold storage tank is connected to the lower water distributor 8, and the other end of the cold-end main pipe of the cold storage tank extends outside the cold storage tank and is connected to the chilled water supply pipe.

[0047] The cold storage tank water distributor structure of the present invention, by setting the floating upper water distributor 4, can float with the liquid level changes and always remain below the liquid surface, avoiding air entrainment, eliminating cavitation, absorbing displacement caused by liquid level difference or temperature expansion, and ensuring stable system operation. At the same time, the upper water distributor 4 and the lower water distributor 8 respectively discharge water laterally, so that the water flows into the cold storage tank in a horizontal direction, thereby significantly reducing the disturbance of the liquid surface, maintaining hydraulic stability, and ensuring that the cold and hot water are mainly transferred by heat, avoiding large-scale flow and stirring, maintaining the cold and hot stratification of the tank, effectively solving the problems of inconsistent liquid levels in multi-tank systems and the destruction of stratification by traditional vertical water discharge, and has the advantages of hydraulic stability, uniform water distribution, energy saving and high efficiency.

[0048] In an embodiment of the present invention, the overflow pipe 1 is used to automatically overflow when the liquid level exceeds the set height to prevent the tank from being overpressurized; the drain port 2 is connected to the bottom of the tank and is used for periodic drainage and cleaning.

[0049] In an embodiment of the present invention, the hot end main pipe of the cold storage tank includes a hot end main pipe 5 and a hot end extension pipe 6. The hot end main pipe 5 is vertically arranged between the upper water distributor 4 and the lower water distributor 8, and is connected to the upper water distributor 4. The hot end extension pipe 6 is connected to the hot end main pipe 5 and extends to the outside of the cold storage tank. The cold end main pipe of the cold storage tank includes a cold end main pipe 9 and a cold end extension pipe 10. The cold end main pipe 9 is vertically arranged between the upper water distributor 4 and the lower water distributor 8, and is connected to the lower water distributor 8. The cold end main pipe 9 is connected to the cold end extension pipe 10 and extends to the outside of the cold storage tank.

[0050] In practice, a blind flange 7 is also installed between the hot end main pipe 5 and the cold end main pipe 9 of the cold storage tank to fix the hot end main pipe 5 and the cold end main pipe 9 of the cold storage tank, ensuring the stability of the pipeline inside the cold storage tank.

[0051] The cold storage tank of the present invention has a cooling release mode and a cold storage mode. In practice, during the cooling release mode, chilled water enters the upper water distributor 4 from the hot end extension pipe 6 and the hot end main pipe 5 of the cold storage tank, enters the cold storage tank, and then exits from the lower water distributor 8 through the cold end main pipe 9 and the cold end extension pipe 10 of the cold storage tank. During the cold storage mode, chilled water enters the lower water distributor 8 from the cold end extension pipe 10 and the cold end main pipe 9 of the cold storage tank, enters the cold storage tank, and then exits from the upper water distributor 4 through the hot end main pipe 5 and the hot end extension pipe 6 of the cold storage tank.

[0052] In one or more embodiments of the present invention, both the upper water distributor 4 and the lower water distributor 8 are disc structures with built-in cavities, and the upper water distributor 4 can automatically adjust its position up and down according to changes in the liquid level in the cold storage tank. By setting a disc structure with built-in cavities, the upper water distributor 4 and the lower water distributor 8 can form a large-diameter closed water distribution unit, and ensure that the entire water distributor has a certain buoyancy.

[0053] In one or more embodiments of the present invention, both the upper water distributor 4 and the lower water distributor 8 include an upper plate, a side plate, and a lower plate. The side plate is disposed between the upper and lower plates, forming a disc structure with an internal cavity. The disc structure is connected to one end of the corresponding hot or cold end main pipe of the cold storage tank. Multiple water distribution ends are provided on the surface of the lower or upper plate, and water outlet holes are provided on the sidewalls of these water distribution ends. By configuring the upper, side, and lower plates, an internal cavity is formed inside the upper and lower water distributors 4 and 8. This disc-shaped cavity has buoyancy, allowing the water distributor to maintain balance in the water and automatically float with changes in liquid level.

[0054] In this invention, the upper water distributor 4 and the lower water distributor 8 are designed as a sealed cavity disc structure, with an inner and outer annular main pipes and upper and lower sealing plates forming an annular fluid channel inside. After chilled water enters the cavity through the main pipe, it flows radially and circumferentially in the annular cavity to form the main flow channel, thereby realizing the distribution and transportation of water.

[0055] Specifically, the upper water distributor main pipe 4 is a double-layered sealed structure, formed by the upper plate 4-1, the side plate 4-2, and the lower plate 4-3 of the upper water distributor cavity, creating a cavity disc structure. This cavity disc has a certain buoyancy, allowing the water distributor to maintain balance in the water and automatically float with changes in liquid level. The water outlet holes 4-5 at the upper water distributor end are located on the side wall of the cavity of the upper water distributor end 4-5 and are evenly arranged circumferentially. The lateral water outlet method allows the water flow to diffuse horizontally rather than vertically impacting the liquid surface, thereby significantly reducing liquid surface disturbance and maintaining stable hot and cold stratification inside the tank. After the chilled water enters the cavity through the hot end main pipe 5 of the cold storage tank, it flows radially and circumferentially within the disc cavity, realizing the main flow transmission and distribution functions. Each upper water distributor end 4-4 is set in a corresponding annular area for local water distribution. When the water flows into the upper water distribution end 4-4, the flow velocity decreases significantly, kinetic energy is dissipated and converted into static pressure energy, forming a local pressure stabilization zone at the upper water distribution end 4-4. This zone is the static pressure chamber of the water distributor, which has the functions of deceleration, pressure equalization and buffering, so that the pressure and flow rate are consistent among the water outlets. Finally, the water flows out through the water outlet 4-5 at the upper water distribution end.

[0056] Similarly, the lower water distributor 8 is also a double-layer sealed structure, formed by the upper plate 8-1, the side plate 8-2, and the lower plate 8-3 of the lower water distributor cavity, creating a cavity disc structure. The water outlet holes 8-5 at the lower water distributor end are located on the side wall of the cavity of the lower water distributor end 8-5 and are evenly arranged circumferentially. The lateral water outlet method allows the water flow to diffuse horizontally rather than vertically impacting the liquid surface, thus significantly reducing liquid surface disturbance and maintaining stable hot and cold stratification inside the tank. After entering the cavity through the cold end main pipe 9 of the cold storage tank, the chilled water flows radially and circumferentially within the disc cavity, realizing the main flow transmission and distribution functions. Each lower water distributor end 8-4 is located in a corresponding annular area for local water distribution. When the water flows into the lower water distributor end 8-4, the flow velocity decreases significantly, kinetic energy is dissipated and converted into static pressure energy, forming a local pressure stabilization zone in the lower water distributor end 8-4. This area is the static pressure chamber of the water distributor, which has the functions of deceleration, pressure equalization and buffering, so that the pressure and flow rate are consistent among the outlet holes. Finally, the water flows out through the outlet hole 8-5 at the end of the lower water distributor.

[0057] Optionally, in one or more embodiments of the present invention, the disc structure is divided into multiple interconnected annular regions of equal area, and each annular region has an equal volume. The number of water distribution terminals in each annular region on the lower or upper plate of the water distributor cavity is equal. By dividing the disc structure into multiple interconnected annular regions of equal area and uniformly arranging the same number of water distribution terminals on each annulus, each water distribution terminal is responsible for the water distribution task of its corresponding annular region. This ensures a balanced flow distribution across regions, avoids localized flow concentration, and thus makes the hydraulic distribution within the cold storage tank more uniform and the stratification more stable.

[0058] Specifically, the water distributor is designed using the principle of equal-area ring water distribution. The disc structure is divided into several rings of equal area, with the same number of water distribution terminals evenly distributed on each ring, ensuring that each terminal bears an equal share of the water distribution area. For example... Figure 4 As shown, the water distributor has a disc-shaped partitioned layout with an equal-area ring distribution method. The entire water distributor is radially divided into multiple equal-area rings from the central main pipe, with the same number of distribution terminals evenly distributed on each ring. Each distribution terminal covers an equal area to achieve flow balance between rings. This arrangement ensures symmetrical distribution of chilled water in the plane, resulting in a more uniform overall outlet flow velocity distribution and avoiding local hydraulic concentration and dead zones. The planar structure design of the water distributor further enhances the stability and stratification retention of the water flow inside the tank, providing a reliable guarantee for the efficient storage and release of chilled water in the system. This design ensures a balanced flow distribution of chilled water within the tank, avoids local velocity concentration, and significantly improves hydraulic uniformity and stratification stability.

[0059] Here, the water distribution end is designed with a structure similar to a static pressure chamber, where the internal flow velocity is reduced, forming a pressure stabilizing zone. The water outlet is located on the end sidewall, distributing water evenly in the horizontal direction, significantly reducing liquid surface disturbance and maintaining the hot and cold stratification of the tank. The water distributor adopts the principle of equal-area ring water distribution, dividing the disc into rings of equal area and evenly arranging the water distribution ends to achieve equal flow distribution.

[0060] In one or more embodiments of the present invention, the number of water distribution ends corresponding to each annular region The calculation formula is:

[0061]

[0062]

[0063]

[0064]

[0065]

[0066] in, This represents the total number of water distribution structures. The volume ratio of each annular region, For the first Number of water distribution terminals in each ring area floating-point numbers, This represents the number of annular regions. for The integer obtained by rounding down. for The remainder after rounding down. for The number of excess water distribution terminals after rounding up the number of annular areas, and the number after rounding up. The number of excess water distribution terminals is based on The water distribution terminals are assigned to the corresponding annular regions from largest to smallest, and the number of terminals corresponding to each annular region is finally obtained. Here, if the elm trees are equal, they can be assigned according to the index or randomly.

[0067] To further improve the uniformity of water distribution and the hydraulic stability of the system, this invention optimizes the cavity structure of the upper water distributor 4 and the lower water distributor 8, as well as the number and size of the water outlet holes at the water distribution end.

[0068] Optionally, in one or more embodiments of the present invention, the volume of the water distribution end is 3-5 times the flow rate of the water distributor outlet.

[0069] In one or more embodiments of the present invention, the aperture of the water distributor outlet hole Determine by the following formula:

[0070]

[0071] in, The total design flow rate of the water distributor. The desired water velocity per outlet of the water distributor is preferably in the range of 0.2–0.6 m / s, more preferably 0.3 m / s. The number of water outlet holes of the water distributor.

[0072] By using this formula to determine the diameter of the water distributor's outlet holes, the flow velocity in each hole can be made consistent, ensuring uniform water distribution.

[0073] In embodiments of the present invention, the total opening area of ​​the water outlet is Preferably, the water inlet cross-sectional area of ​​the water distributor is [missing information]. The pressure is set at 80% to 100% to maintain a slight back pressure within the cavity, ensuring uniform pressure distribution within the pressure stabilization zone.

[0074] Optionally, in one or more embodiments of the present invention, the cold storage tank water distributor structure further includes a retractable flexible connecting pipe 3. One end of the hot end main pipe of the cold storage tank is connected to the upper water distributor 4 via the flexible connecting pipe 3, and the upper water distributor 4 can drive the flexible connecting pipe 3 to extend and retract when it automatically adjusts its position up and down according to the liquid level change in the cold storage tank. By setting the flexible connecting pipe 3, displacement caused by liquid level difference or temperature expansion can be absorbed, enabling it to automatically compensate for height difference when the liquid levels of each cold storage tank are inconsistent, achieving a dual buffer of hydraulics and structure, and avoiding stress concentration and cavitation, thereby maintaining stable operation of the water distributor. In this embodiment, the flexible connecting pipe 3 is an elastic and retractable rubber corrugated pipe.

[0075] In one or more embodiments of the present invention, the minimum extension / retraction amount of the flexible connecting tube 3 The calculation formula is:

[0076]

[0077]

[0078]

[0079] in, This is the expansion amount of the cold storage tank. The surface area of ​​the cold storage tank. The coefficient of thermal expansion of chilled water is denoted as . For the volume of the cold storage tank, The density of the chilled water before cooling. This is the density of the chilled water after cooling.

[0080] The minimum expansion and contraction of flexible connector 3 is calculated using the above formula. This allows us to determine the required expansion and contraction compensation range of the flexible connecting pipe 3, ensuring the long-term safe and reliable operation of the system.

[0081] like Figure 5 As shown, the present invention also discloses a cold storage tank system, including multiple cold storage tank water distributor structures, wherein the hot end main pipe and the cold end main pipe of the multiple cold storage tank water distributor structures are respectively connected to the chilled water return pipe and the chilled water supply pipe.

[0082] The cold storage tank system of the present invention connects multiple cold storage tanks in parallel to the same pipeline network. Due to differences in installation elevation, construction deviation and operating conditions, there may be differences in the liquid level of the tanks. The present invention achieves automatic compensation between the tanks through flexible soft connection, so that the water distributor can adaptively adjust with the liquid level and avoid uneven pressure or overflow between the tanks.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A water distributor structure for a cold storage tank, characterized in that: The system includes an overflow pipe (1), a drain outlet (2), an upper water distributor (4) for side-discharge, a hot-end main pipe (9) for the cold storage tank, a lower water distributor (8) for side-discharge, and a cold-end main pipe (5) for the cold storage tank. The overflow pipe (1) and the drain outlet (2) are respectively connected to the cold storage tank. The upper water distributor (4) is floatingly installed inside the cold storage tank and located at the top of the cold storage tank. The lower water distributor (8) is fixedly installed inside the cold storage tank and located at the bottom of the cold storage tank. The hot end main pipe and the cold end main pipe of the cold storage tank are respectively located between the upper water distributor (4) and the lower water distributor (8). One end of the hot end main pipe of the cold storage tank is connected to the upper water distributor (4), and the other end of the hot end main pipe of the cold storage tank extends to the outside of the cold storage tank and is connected to the chilled water return pipe. One end of the cold end main pipe of the cold storage tank is connected to the lower water distributor (8), and the other end of the cold end main pipe of the cold storage tank extends to the outside of the cold storage tank and is connected to the chilled water supply pipe.

2. The structure of the cold storage tank water distributor according to claim 1, characterized in that: Both the upper water distributor (4) and the lower water distributor (8) are disc structures with built-in cavities, and the upper water distributor (4) can automatically adjust its position up and down as the liquid level in the cold storage tank changes.

3. The structure of the cold storage tank water distributor according to claim 2, characterized in that: The upper water distributor (4) and the lower water distributor (8) both include a water distributor cavity upper plate, a water distributor cavity side plate and a water distributor cavity lower plate. The water distributor cavity side plate is disposed between the water distributor cavity upper plate and the water distributor cavity lower plate and forms a disc structure with an internal cavity. The disc structure is connected to one end of the corresponding hot end main pipe of the cold storage tank or the cold end main pipe of the cold storage tank. The surface of the water distributor cavity lower plate or the water distributor cavity upper plate is provided with multiple water distribution ends. The side wall of the water distribution end is provided with a water distributor outlet hole.

4. The structure of the cold storage tank water distributor according to claim 3, characterized in that: The disc structure is divided into multiple interconnected annular regions of equal area, and each annular region has an equal volume. The water distribution ends of each annular region on the lower plate or upper plate of the water distributor cavity are equal.

5. The structure of the cold storage tank water distributor according to claim 4, characterized in that: The number of water distribution terminals corresponding to each annular region The calculation formula is: ； ； ； ； ； in, This represents the total number of water distribution structures. The volume ratio of each annular region, The number of water distribution terminals in the j-th annular region floating-point numbers, This represents the number of annular regions. for The integer obtained by rounding down. for The remainder after rounding down. for The number of excess water distribution terminals after rounding up the number of annular areas, and the number after rounding up. The number of excess water distribution terminals is based on The water distribution terminals are assigned to the corresponding annular regions from largest to smallest, and the number of terminals corresponding to each annular region is finally obtained. .

6. The structure of the cold storage tank water distributor according to claim 3, characterized in that: The volume of the water distribution end is 3-5 times the flow rate of the water distributor outlet.

7. The structure of the cold storage tank water distributor according to claim 6, characterized in that: The diameter of the water outlet of the water distributor Determine by the following formula: ； in, The total design flow rate of the water distributor. The desired water velocity per orifice of the water distributor. The number of water outlet holes of the water distributor.

8. The structure of the cold storage tank water distributor according to claim 1, characterized in that: It also includes a retractable flexible connecting pipe (3), one end of the hot end main pipe of the cold storage tank is connected to the upper water distributor (4) by the flexible connecting pipe (3), and the upper water distributor (4) can drive the flexible connecting pipe (3) to retract when it automatically adjusts its position up and down with the change of liquid level in the cold storage tank.

9. The structure of the cold storage tank water distributor according to claim 8, characterized in that: Minimum expansion / contraction of the flexible connector (3) The calculation formula is: ； ； ； in, This is the expansion amount of the cold storage tank. The surface area of ​​the cold storage tank. The coefficient of thermal expansion of chilled water is denoted as . For the volume of the cold storage tank, The density of the chilled water before cooling. This is the density of the chilled water after cooling.

10. A cold storage tank system, characterized in that: The system includes multiple cold storage tank water distributor structures as described in any one of claims 1-9, wherein the hot end main pipe and the cold end main pipe of the cold storage tank of the multiple cold storage tank water distributor structures are respectively connected to the chilled water return pipe and the chilled water supply pipe.

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