Water flow distribution device and cold storage equipment

Abstract

The utility model provides a water flow distribution device and cold storage equipment, the cold storage equipment is provided with a water storage space, the water flow distribution device is arranged in the water storage space to serve as a water distributor or a water collector, and the water distributor evenly distributes inflow water flow to the cross section covered by the water distributor. And the water collector uniformly sucks water flow from the water collector covering cross section, gathers the water flow and then flows out. The water distributor is composed of a water inlet pipe, a multi-stage distribution pipe, a plurality of rows of water outlet manifolds and a plurality of water outlet manifolds, and water outlet holes with equal diameters and unequal intervals are formed in the water outlet manifolds. The water collector is composed of a water outlet pipe, a multi-stage distribution pipe, a plurality of rows of water inlet manifolds and a plurality of water inlet manifolds, and water outlet holes with equal diameters and unequal intervals are formed in the water inlet manifolds. And throttling holes are formed in the pipe sections, penetrating through the distribution pipe, of the water outlet manifolds or the water inlet manifolds, so that the water flow uniformity between the water outlet manifolds or the water inlet manifolds in different rows is improved. Due to the unequal-interval design of the water outlet holes or the water inlet holes, the uniformity of water flow per unit area in different areas on the cross section covered by the water distributor or the water collector is improved.

Description

Technical Field

[0001] This application relates to the technical field of cold storage devices, and more specifically, to a water flow distribution device and a cold storage device. Background Art

[0002] Through certain technical means, refrigeration and cold production are carried out by relying on electricity during the low electricity price period, and the "cold quantity" is stored. Then, when needed (usually during the high electricity price peak period), it is released and utilized to achieve the purpose of "peak shaving and valley filling", energy conservation and cost reduction. This technology is called cold storage technology.

[0003] Cold storage technology is generally divided into two categories: water cold storage and ice cold storage. In the water cold storage system, the cold storage device stores low-temperature chilled water produced during the low electricity price period. Water is used as the carrier of "cold quantity". During the cooling period, low-temperature chilled water is pumped out, the "cold quantity" in it is collected and supplied to the air conditioning system, and then the water temperature rises. The warm water then returns to the cold storage device; this process is called "taking cold". During the taking cold process, low-temperature chilled water needs to be pumped out from the water collector (usually located at the bottom) in the cold storage device, and the warm water after taking cold is sent into the cold storage device and flows in through the water distributor (usually at the top). In the ice cold storage system, the cold storage device stores a mixture of ice and water produced during the low electricity price period. Ice is used as the main carrier of "cold quantity". During the cooling period, the low-temperature water of the ice-water mixture is pumped out from the cold storage device through the water collector by relying on a water pump, the "cold quantity" in it is collected and supplied to the air conditioning system, and then the water temperature rises. The warm water then returns to the cold storage device, is divided by the water distributor and flows towards the ice layer, melts the ice layer, and its own temperature drops, so as to obtain "cold quantity" again and then flows out through the water collector for cooling; this process is called "ice melting and cold release". In the ice cold storage device, the water distributor and water collector are arranged in forms such as "horizontal" and "vertical". In some heating systems, the principle of "peak-valley electricity price" is also used for energy-saving and consumption-reducing operation of heating equipment. At this time, a heat storage device (usually a hot water storage tank, and water is used as the carrier of "heat") needs to be equipped in the system, which stores high-temperature hot water produced during the low electricity price period. During the heating period, high-temperature hot water is pumped out, the "heat" in it is collected and supplied to the heating system, and then the water temperature drops. The cold water then returns to the heat storage device; this process is called "taking heat". During the taking heat process, high-temperature hot water is pumped out from the water collector in the hot water storage tank, and the cold water after taking heat is sent into the hot water storage tank and flows in through the water distributor. In the centralized domestic hot water system, a domestic water tank (with heat insulation and heat preservation functions, that is, "storing heat" and "storing water") is equipped, which stores high-temperature hot water. During the hot water usage period, high-temperature hot water is pumped out from the bottom, and the hot water does not return to the domestic water tank. After the hot water is used up or a certain amount is used, low-temperature tap water will flow into the tank through the makeup water pipe for replenishment. A water collector is arranged at the bottom of the domestic hot water tank, and a water distributor is arranged at the top of the tap water makeup, which is beneficial to slowing down the impact of low-temperature makeup water on high-temperature hot water, reducing the mixing degree of the two, improving the stratification effect of cold and hot water, and ensuring higher utilization rate of high-temperature hot water.

[0004] In the above scenarios, the main functions of the water distributor and the water collector are to evenly distribute the water flow and evenly suck in the water flow. The even distribution of the water flow rate is crucial and is beneficial to improving the utilization rates of "cooling capacity", "heating capacity", and "hot water".

[0005] In the design of conventional water distributors and water collectors, the degree of evenness is often low, resulting in:

[0006] "Cooling capacity surplus" in ice thermal energy storage (part of the "cooling capacity" cannot be released because some ice layers do not receive sufficient warm water flow and thus cannot melt);

[0007] In water thermal energy storage, the low-temperature chilled water is dispersed by the return warm water and cannot be used by the air-conditioning system due to the increase in water temperature, resulting in "disappearance of cooling capacity";

[0008] In heat storage or a hot water tank, the high-temperature hot water is dispersed by the low-temperature water and cannot be used by the heating or hot water system due to the decrease in water temperature, resulting in "disappearance of heat";

[0009] All of the above situations will lead to serious waste of energy. Summary of the Invention

[0010] The present application aims to provide a water flow distribution device and a cold storage device. The water collector evenly sucks in the water flow from one end of the tank or box body and then flows out after aggregation. After the outflowing water flow is utilized, if it needs to return to the tank or box body, the water distributor evenly distributes the water flow to the cross-section of the tank or box body, so as to improve the flow rate evenness of the water collector and the water distributor, and solve the problem of energy waste caused by uneven water flow during water distribution or water collection in the prior art.

[0011] In a first aspect, the present application provides a water flow distribution device. The water flow distribution device is used as a water distributor to evenly distribute the water flow flowing into the water storage space to the cross-section covered by the water distributor, or as a water collector to evenly suck in the water flow from the cross-section covered by the water collector and then flow out of the water storage space after aggregation.

[0012] The water flow distribution device includes:

[0013] A main water pipe for inputting or outputting water flow to the water storage space;

[0014] A distribution pipe network for dispersing the water flow input by the main water pipe, or for collecting the water flow to the main water pipe for output; the distribution pipe network includes n levels of distribution pipes (n≥2), which are connected in sequence from the first-level distribution pipe to the nth-level distribution pipe. The number of each level of distribution pipes increases relative to the upper-level distribution pipe connected thereto, and the first-level distribution pipe is connected to the main water pipe;

[0015] A connecting pipe is disposed radially through the nth-level distribution pipe along the nth-level distribution pipe;

[0016] A manifold is connected to the connecting pipe and is provided with a plurality of water passing holes for communicating with the water storage space.

[0017] Wherein, a throttling hole is provided on the pipe wall of the connecting pipe, so that the manifold communicates with the nth-stage distribution pipe through the throttling hole, and the aperture of the throttling hole is smaller than the pipe diameter of the nth-stage distribution pipe.

[0018] In this application, a distribution pipe network formed by setting n-stage distribution pipes is used to disperse water flow step by step. At least one manifold is provided on the nth-stage distribution pipe at the last stage, so that the water flow in a single manifold is reduced. A throttling hole is provided on the connecting pipe, and the flow velocity of water in the throttling hole increases, so as to alleviate the problem of uneven water volume distribution in each manifold caused by the static pressure difference between the inlet and outlet, and achieve the effect of uniform water collection or water distribution.

[0019] Specifically, when the water flow distribution device is used as a water distributor, it includes an inlet pipe (the main pipe serves as the inlet pipe at this time), multi-stage distribution pipes, multiple rows and multiple water outlet manifolds. Equal-diameter but unequally-spaced water outlet holes (the water passing holes serve as the water outlet holes at this time) are opened on the water outlet manifolds. The inlet pipe is vertically connected to the first-stage distribution pipe, and adjacent-stage distribution pipes are vertically connected to each other; the water outlet manifold directly passes through the last-stage distribution pipe connected thereto, and is sealed by welding or other forms at the place where it passes through the distribution pipe. Throttling holes are opened on a partial pipe section of the water outlet manifold passing through the distribution pipe. The throttling holes are located on the side of the last-stage distribution pipe facing away from the water flow, and the cross-sectional area of the throttling holes is such that the water flow velocity after passing through the throttling holes is 2.0 times or more of the water flow velocity in the distribution pipe where the throttling holes are located before.

[0020] When the water flow distribution device is used as a water collector, it includes an outlet pipe (the main pipe serves as the outlet pipe at this time), multi-stage distribution pipes, multiple rows and multiple water inlet manifolds. Equal-diameter but unequally-spaced water inlet holes are opened on the water inlet manifolds. The outlet pipe is vertically connected to the first-stage distribution pipe, and adjacent-stage distribution pipes are vertically connected to each other; the water inlet manifold directly passes through the last-stage distribution pipe connected thereto, and is sealed by welding or other forms at the place where it passes through the distribution pipe. Throttling holes are opened on a partial pipe section of the water inlet manifold passing through the distribution pipe. The throttling holes are located in the last-stage distribution pipe. The sum of the cross-sectional areas of the throttling holes on the water inlet manifold is 0.2 - 0.7 times the sum of the cross-sectional areas of all the water inlet holes on the water inlet manifold, and the sum of the cross-sectional areas of the throttling holes on all the water inlet manifolds is greater than the inner cross-sectional area of the outlet pipe.

[0021] In the water outlet manifold of the water distributor, when the water flow direction is only in one direction, the center distance between adjacent water outlet holes on the same straight line of this pipe section gradually increases along the water flow direction. If there are two water flows in opposite directions in the water outlet manifold of the water distributor, the center distance between adjacent water outlet holes on the same straight line of this pipe section gradually decreases along the water flow direction. On the water inlet manifold of the water collector, the center distance between adjacent water inlet holes on the same straight line gradually increases along the water flow direction.

[0022] When the installation method is horizontal, the first-stage distribution pipe is located at the middle position of all rows of water outlet manifolds or water inlet manifolds, and the second-stage distribution pipe is located at the middle position of the water outlet manifolds or water inlet manifolds of the rows covered by the second-stage distribution pipe, and each stage of distribution pipes is arranged in this way. When the installation method is vertical installation, the position of the first-stage distribution pipe is at a height close to the top, and the second-stage distribution pipe is located at a position close to the top of the water outlet manifolds or water inlet manifolds of the rows covered by the second-stage distribution pipe, and each stage of distribution pipes is arranged in this way. For the water collector, the position heights of all distribution pipes are below the water level.

[0023] The last-stage distribution pipe directly connected to the water outlet manifold or water inlet manifold adjusts the water flow velocity in the pipe by gradually changing the diameter along the water flow direction in the pipe. The diameter of the last-stage distribution pipe of the water distributor gradually decreases along the water flow direction in the pipe, and the diameter of the last-stage distribution pipe of the water collector gradually increases along the water flow direction in the pipe. The principle of diameter change is to make the water flow velocity in the last-stage distribution pipe tend to be similar, but the specific situation of the pipe material specification and the diameter change specification needs to be combined.

[0024] The water flow velocity in the higher-stage distribution pipe is 30-110% of the water flow velocity in the lower-stage distribution pipe connected to it.

[0025] In a second aspect, an embodiment of the present application provides a cold storage device, which includes:

[0026] A cold storage device, provided with a water storage space;

[0027] A cold-using pipeline;

[0028] Two water flow distribution devices according to any one of the first aspects are relatively arranged in the water storage space and are respectively connected to both ends of the cold-using pipeline through the main water pipes of the water flow distribution devices. One of the two water flow distribution devices is used as a water distributor and the other is used as a water collector. Description of the Drawings

[0029] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0030] Figure 1 Schematic diagram of a water distributor installed horizontally according to an embodiment of the present application;

[0031] Figure 2 Schematic diagram of a water distributor installed vertically according to an embodiment of the present application;

[0032] Figure 3 Schematic diagram of a water collector installed horizontally according to an embodiment of the present application;

[0033] Figure 4 Schematic diagram of a water collector installed vertically according to an embodiment of the present application;

[0034] Figure 5 Schematic diagram of the openings on the outlet manifold of the water distributor according to an embodiment of the present application Figure 1 ;

[0035] Figure 6 Schematic diagram of the openings on the outlet manifold of the water distributor according to an embodiment of the present application Figure 2 ;

[0036] Figure 7 Schematic diagram of the openings on the inlet manifold of the water collector according to an embodiment of the present application.

[0037] Reference numerals:

[0038] Water distributor (100), water inlet pipe (110), first-stage distribution pipe (121), second-stage distribution pipe (122), outlet manifold (130), outlet hole (140), throttle hole (150);

[0039] Water collector (200), water outlet pipe (210), first-stage distribution pipe (221), second-stage distribution pipe (222), inlet manifold (230), inlet hole (240), throttle hole (250). Detailed description of the specific embodiments

[0040] The following will describe in detail the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

[0041] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0042] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0043] In a first aspect, the purpose of the present application is to provide a water flow distribution device. The water flow distribution device includes a main water pipe, a distribution pipe network, and a manifold connected in sequence. The manifold is provided with a plurality of water passing holes, and the plurality of water passing holes are located on the same cross-section within the water storage space. When the water flow distribution device is used as a water distributor, the main water pipe is used to input water flow into the water storage space, the distribution pipe network is used to disperse the water flow input by the main water pipe, and the plurality of water passing holes on the manifold disperse the water flow dispersed by the distribution pipe network again and then input it onto the cross-section of the water storage space. When the water flow distribution device is used as a water collector, the plurality of water passing holes on the manifold suck water flow from the cross-section of the water storage space, the distribution pipe network is used to collect the sucked water flow to the main water pipe, and the collected water flow is output through the main water pipe. Among them, the distribution pipe network includes n - stage distribution pipes (n≥2), the first - stage distribution pipe is connected to the main water pipe, and the manifold is connected to the n - th stage distribution pipe; the first - stage distribution pipe to the n - th stage distribution pipe are connected in sequence, and the number of each stage of distribution pipe increases relative to the previous stage of distribution pipe to which it is connected.

[0044] The water flow distribution device further includes a connecting pipe. The manifold is connected to the n - th stage distribution pipe through the connecting pipe. The connecting pipe penetrates through the n - th stage distribution pipe and is connected to the manifold. A throttling hole is provided on the connecting pipe to communicate the manifold and the n - th stage distribution pipe, and the speed of the water flow in the throttling hole increases to alleviate the problem of uneven water volume distribution among the manifolds caused by the static pressure difference between the inlet and outlet.

[0045] Optionally, a throttle orifice is provided on the side of the connecting pipe facing away from the water flow direction in the nth-stage distribution pipe to relieve the impact of water flow and make the water distribution more precise, which is beneficial to improving the uniformity of water volume distribution.

[0046] The connecting pipe and the manifold can be integrally formed structures. In other words, the connecting pipe can be a part of the manifold and is used to penetrate and connect to the nth-stage distribution pipe. In some other embodiments, the connecting pipe and the manifold can also be a split structure, and the two are hermetically connected by welding or bonding.

[0047] The following will detail the embodiment of the water flow distribution device provided in this application as a water distributor. Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 The structural schematic diagram of the water distributor is shown. In the embodiment of the water distributor: (1) The main water pipe serves as the water inlet pipe 110. (2) The distribution pipe network includes n stages of distribution pipes (n≥2), that is, the distribution pipe network is composed of the first-stage distribution pipe 121, the second-stage distribution pipe 122,..., the nth-stage distribution pipe 12n. It should be noted that only the distribution pipe network including the first-stage distribution pipe 121 and the second-stage distribution pipe 122 is used as an exemplary illustration in the embodiments and drawings of this application, and the number of stages of the distribution pipes is not an exhaustive example. Those skilled in the art should be able to understand the implementation manners of the distribution pipe network with more stages by referring to this example. (3) The manifold serves as the water outlet manifold 130, and the water passing holes on the manifold serve as the water outlet holes 140 at this time. (4) The throttle orifice on the connecting pipe is the throttle orifice 150.

[0048] As Figure 1 、 Figure 2 shown, the water distributor according to the embodiment of this application includes: a water inlet pipe 110; the first-stage distribution pipe 121, the second-stage distribution pipe 122,..., the nth-stage distribution pipe 12n, and a water outlet manifold 130; wherein, the water inlet pipe 110 is vertically connected to the first-stage distribution pipe 121, the second-stage distribution pipe 122 is vertically connected to the third-stage distribution pipe, and so on. The water outlet manifold 130 vertically penetrates the last-stage distribution pipe and is sealed by welding or other forms at the place where it penetrates the distribution pipe.

[0049] Each pipeline in the embodiment of this application is made of metal and is hermetically connected by welding; or it is made of high molecular polymers such as PP (polypropylene) and PVC (polyvinyl chloride), and is hermetically connected by hot melt adhesive, sealant, etc.

[0050] As Figure 1 、 Figure 2 、 Figure 5 、 Figure 6As shown, a throttle hole 150 is formed in a partial pipe section of the outlet manifold 130 passing through the final-stage distribution pipe (12n, when n is the maximum), and the throttle hole 150 is located within the final-stage distribution pipe (12n, when n is the maximum). Exemplarily, in the examples and drawings of the present application, the second-stage distribution pipe 122 is the final-stage distribution pipe, and the throttle hole 150 is provided in the portion of the outlet manifold 130 located in the second-stage distribution pipe 122. The cross-sectional area of the throttle hole 150 is such that the water flow velocity after passing through the throttle hole 150 is 2.0 times or more of the water flow velocity within the distribution pipe (12n, when n is the maximum) before the throttle hole 150.

[0051] As Figure 5 , Figure 6 shown, a plurality of outlet holes 140 with equal diameters are formed in the outlet manifold 130, and the center-to-center spacing L of adjacent outlet holes on the same straight line is not equal. Specifically, as follows:

[0052] When there is only one direction of water flow in the outlet manifold 130, for example, Figure 1 , Figure 2 in the first to fifth rows of the outlet manifold and the leftmost and rightmost parts of the outlet manifold in the sixth to tenth rows, on the pipe sections of these outlet manifolds, the center-to-center spacing of adjacent outlet holes on the same straight line gradually increases along the water flow direction, that is: L101 < L102 < L103, L104 < L105 < L106. That is to say, the embodiment of the present application has a first type of manifold, hereinafter referred to as the first manifold. One end of the first manifold is connected to the nth-stage distribution pipe and the other end is closed. When the first manifold is used as the outlet manifold 130, the spacing between adjacent two water passing holes in the same column of the first manifold gradually increases along the direction away from the nth-stage distribution pipe (when the first manifold is used as the outlet manifold 130, the water flow flows out from the nth-stage distribution pipe).

[0053] When there are two water flows in opposite directions in the outlet manifold 130, for example, Figure 1 , Figure 2 in the middle pipe section of the sixth to tenth row outlet manifolds in, on these pipe sections, the center-to-center spacing of adjacent outlet holes on the same straight line gradually decreases along the water flow direction, that is: L107 > L108 > L109 > L110, L111 > L112 > L113 > L114. That is to say, the embodiment of the present application has a second type of manifold, hereinafter referred to as the second manifold in the present application. Both ends of the second manifold are respectively connected to two nth-stage distribution pipes. When the second manifold is used as the outlet manifold 130, the spacing between adjacent two water passing holes in the same column of the second manifold gradually decreases from both ends of the second manifold to the midpoint position of the second manifold (when the second manifold is used as the outlet manifold 130, the water flow flows out from the nth-stage distribution pipes at both ends).

[0054] Explanation for the unequal spacing design of the outlet holes 140:

[0055] When there is only one direction of water flow in the water outlet manifold 130, on a certain section of the water outlet manifold 130 including multiple water outlet holes 140, along the water flow direction in the pipe, part of the water flow will be discharged and divided every time it passes through a water outlet hole 140, resulting in a decrease in water flow and water flow rate in the rear section, a decrease in flow rate in the pipe, a decrease in dynamic pressure, and an increase in static pressure, resulting in a greater static pressure in the pipe at the water outlet holes at the rear end, an increase in the static pressure difference between the water outlet holes and the outside of the water outlet holes, an increase in the water flow rate out of the water outlet holes, and a greater amount of discharged water. Therefore, in order to ensure the uniformity of the water flow, it is necessary to increase the spacing between the water outlet holes with a larger water flow rate and reduce the spacing between the water outlet holes with a smaller water flow rate, that is, along the water flow direction in the water outlet manifold pipe, the center spacing of adjacent water outlet holes on the same straight line gradually increases.

[0056] When there are two water flows in opposite directions in the water outlet manifold 130, the water flow to the middle position of this section of the water outlet manifold is relatively small due to the mutual impact of the water flows. Therefore, the spacing between the water outlet holes near the middle position needs to be reduced, that is, along the water flow direction in the water outlet manifold, the center spacing of adjacent water outlet holes on the same straight line gradually decreases.

[0057] Description of the throttling hole 150 on the water outlet manifold 130:

[0058] In the final distribution pipe (12n, when n is the maximum), along the direction of water flow, part of the water flow will be diverted each time it passes through a water outlet manifold 130, resulting in a decrease in water flow and water flow rate in the rear section, a decrease in flow rate in the pipe, a decrease in dynamic pressure, and an increase in static pressure, which results in a greater static pressure in the pipe at the outlet manifold further toward the rear end, and an increase in the static pressure difference between the inside and outside of the outlet manifold. The outlet water flow rate of the water entering the entire row of outlet manifolds from the final distribution pipe increases, and the discharged water flow is greater. Therefore, the water flow distributed to the outlet manifolds in different rows is uneven.

[0059] In order to reduce the unevenness of the static pressure difference between the inlet and outlet of different discharge water manifolds, this application provides the following solutions:

[0060] 1. A throttle hole 150 is added between the final distribution pipe (12n, when n is the maximum) and the water outlet manifold 130, so that the water flow distributed from the final distribution pipe to the water outlet manifold must pass through the throttle hole. Due to the resistance of the throttle hole, the static pressure difference at the inlet and outlet of each water outlet manifold is greatly improved, so that the base (or average) of the static pressure difference is increased, thereby reducing the unevenness of the static pressure difference of each water outlet manifold (the difference in the percentage of the static pressure difference of each row to the base (average) is reduced).

[0061] 2. For the last-stage distribution pipe (12n when n is the largest), the inner diameter of the pipe is gradually changed along the water flow direction in the pipe to adjust the water flow velocity in the pipe, so that the water flow velocities in the last-stage distribution pipes tend to be similar, but the specific conditions of the pipe material specifications and the diameter change specifications need to be considered. The inner diameter of the last-stage distribution pipe of the water distributor gradually decreases along the water flow direction in the pipe.

[0062] Optionally, in combination with Figure 5 and Figure 6 As shown, there are multiple rows of water passing holes arranged at intervals around the axis of the manifold, and each row of water passing holes includes a plurality of water passing holes arranged at intervals along the extension direction of the manifold.

[0063] Optionally, the interval angle α between two adjacent rows of water passing holes around the axis of the manifold is 30 - 150 degrees.

[0064] Optionally, two adjacent rows of water passing holes are staggered in the extension direction of the manifold.

[0065] Next, an embodiment of the water flow distribution device provided in the present application as a water collector will be described in detail. Figure 3 , Figure 4 , Figure 7 The structural schematic diagram of the water collector is shown. In the embodiment of the water collector: (1) The main water pipe serves as the outlet pipe 210. (2) The distribution pipe network includes n - stage distribution pipes (n ≥ 2), that is, the distribution pipe network is composed of the first - stage distribution pipe 121, the second - stage distribution pipe 122,..., the n - th stage distribution pipe 12n. It should be noted that in the embodiments and accompanying drawings of the present application, only the distribution pipe network including the first - stage distribution pipe 121 and the second - stage distribution pipe 122 is used for exemplary illustration, and the number of stages of the distribution pipes is not an exhaustive example. Those skilled in the art should be able to understand the implementation manners of the distribution pipe network with more stages by referring to this example. (3) The manifold serves as the inlet manifold 230, and the water passing holes on the manifold serve as the inlet holes 240 at this time. (4) The throttle holes on the connecting pipe are the throttle holes 250.

[0066] As Figure 3 , Figure 4 As shown, the water collector according to the embodiment of the present application includes: an outlet pipe 210; the first - stage distribution pipe 221, the second - stage distribution pipe 222,..., the n - th stage distribution pipe 22n, and an inlet manifold 230; wherein, the outlet pipe 210 is perpendicularly connected to the first - stage distribution pipe 221, the second - stage distribution pipe 222 is perpendicularly connected to the third - stage distribution pipe, and so on. The inlet manifold 230 perpendicularly passes through the last - stage distribution pipe (22n when n is the largest), and is sealed by welding or other forms at the place where it passes through the last - stage distribution pipe.

[0067] As Figure 3 , Figure 4 , Figure 7As shown, a throttle hole 250 is provided on a partial pipe section of the water inlet manifold 230 passing through the final stage distribution pipe (12n, where n is the maximum). The throttle hole 250 is located inside the final stage distribution pipe (12n, where n is the maximum). Exemplarily, in the examples and drawings of the present application, the second stage distribution pipe 222 is the final stage distribution pipe, and the throttle hole 250 is provided on the part of the water inlet manifold 230 located in the second stage distribution pipe 122. The sum of the cross-sectional areas of the throttle holes 250 is 0.2 - 0.7 times the sum of the cross-sectional areas of all the water inlet holes 240 on this water inlet manifold, and the sum of the cross-sectional areas of the throttle holes 250 on all the water inlet manifolds 230 needs to be greater than the inner cross-sectional area of the water outlet pipe 210.

[0068] In other words, the sum of the cross-sectional areas of the multiple water passing holes on each manifold is S1, the cross-sectional area of the throttle hole on the connecting pipe connected to each manifold is S2, the sum of the cross-sectional areas of the throttle holes on the multiple connecting pipes in the water flow distribution device is S3, and the cross-sectional area of the main water pipe is S4; among them, S2 < S1, and S4 < S3. Further, the ratio range of S2 to S1 is 0.2 - 0.7.

[0069] As Figure 7 shown, a plurality of water inlet holes 240 with equal diameters are provided on the water inlet manifold 230, and the center-to-center spacing L of adjacent water inlet holes on the same straight line is not equal. Specifically, as follows:

[0070] The center-to-center spacing of adjacent water inlet holes on the same straight line of the water inlet manifold 230 gradually decreases along the water flow direction, that is: L201 < L202 < L203, L204 < L205 < L206, L207 < L208 < L209 < L210, L211 < L212 < L213 < L214.

[0071] Combined with Figure 3 、 Figure 4 and Figure 7 it can be known that the embodiments of the present application have two types of manifolds. The first type of manifold, hereinafter referred to as the first manifold, one end of the two ends of the first manifold is connected to the nth stage distribution pipe and the other end is closed. When the first manifold is used as the water inlet manifold 230, the spacing between adjacent two water passing holes in the same column of the first manifold gradually decreases along the direction away from the nth stage distribution pipe (when the first manifold is used as the water inlet manifold 230, the water flow direction is towards the nth stage distribution pipe). The second type of manifold, hereinafter referred to as the second manifold, both ends of the second manifold are respectively connected to two nth stage distribution pipes. When the second manifold is used as the water inlet manifold 230, the spacing between adjacent two water passing holes in the same column of the second manifold gradually decreases from both ends of the second manifold to the midpoint position of the second manifold (when the second manifold is used as the water inlet manifold 230, the water flow direction is towards the nth stage distribution pipes at both ends). It should be noted that the first manifold and the second manifold can be two separate pipes, or different parts of the same pipe.

[0072] Explanation of the unequal pitch design for the water inlet holes 240:

[0073] On a water inlet manifold 230 that contains multiple water inlet holes 240 in a certain section, along the direction of the water flow inside the pipe, every time a water inlet hole is passed, a part of the flow rate is introduced, resulting in an increase in the water flow rate and water velocity in the subsequent section, an increase in the flow velocity and dynamic pressure inside the pipe, while the static pressure will decrease. As a result, the static pressure inside the pipe at the water inlet holes closer to the rear end becomes smaller, and the static pressure difference between the inside and outside of the water inlet holes increases. The water inlet flow velocity of the water inlet holes increases, and the inhaled water flow rate becomes larger. Therefore, to ensure the uniformity of the water flow rate, it is necessary to increase the pitch between the water inlet holes with a relatively large water inlet flow velocity and reduce the pitch between the water inlet holes with a relatively small water inlet flow velocity, that is, along the direction of the water flow inside the water inlet manifold pipe, the center distance between adjacent water inlet holes on the same straight line gradually increases.

[0074] Explanation of the throttling holes 250 provided on the water inlet manifold 230:

[0075] Inside the last-stage distribution pipe (22n, when n is the largest), along the direction of the water flow, every time a row of water inlet manifolds 230 is passed, a part of the water flow rate is inhaled, resulting in an increase in the water flow rate and water velocity in the subsequent section of the last-stage distribution pipe, an increase in the flow velocity and dynamic pressure inside the pipe, while the static pressure will decrease. As a result, the static pressure inside the pipe at the connection of the water inlet manifold closer to the rear end to the last-stage distribution pipe becomes smaller, and the static pressure difference before and after the water inlet manifold enters the last-stage distribution pipe increases. The water inlet flow velocity of the entire row of water inlet manifolds increases, and the inhaled water flow rate becomes larger. Therefore, the flow rates inhaled by different rows of water inlet manifolds are not uniform.

[0076] To reduce the non-uniformity of the static pressure difference before and after different rows of water inlet manifolds enter the last-stage distribution pipe, the present application provides the following solutions:

[0077] 1. Add throttling holes 250 between the last-stage distribution pipe (22n, when n is the largest) and the water inlet manifold 230, so that the water flow rate inhaled by the water inlet manifold must pass through the throttling holes 250 before entering the last-stage distribution pipe. Due to the resistance effect of the throttling holes, the static pressure differences before and after each row of water inlet manifolds enter the last-stage distribution pipe are greatly increased, making the base number (or average value) of the static pressure differences of each row increase significantly, thereby reducing the non-uniformity of the static pressure differences of each row of water inlet manifolds (the percentage difference amplitude compared with the base number (or average value) of the static pressure differences decreases).

[0078] 2. For the last-stage distribution pipe (22n, when n is the largest), the pipe diameter gradually changes along the direction of the water flow inside the pipe to adjust the water flow velocity inside the pipe, so that the water flow velocities at various positions inside the last-stage distribution pipe tend to be similar, but specific situations such as the pipe material specifications and the diameter change specifications need to be considered. The pipe diameter of the last-stage distribution pipe of the water collector gradually increases along the direction of the water flow inside the pipe.

[0079] Optionally, in combination withFigure 7 As shown, multiple rows of water passing holes are arranged at intervals around the axis of the manifold, and each row of water passing holes includes a plurality of water passing holes arranged at intervals along the extension direction of the manifold.

[0080] Optionally, the interval angle β between two adjacent rows of water passing holes around the axis of the manifold is 30 - 150 degrees.

[0081] Optionally, two adjacent rows of water passing holes are staggered in the extension direction of the manifold.

[0082] The water distributor and water collector provided by the embodiments of the present application can have various installation methods, such as a vertical installation method or a horizontal installation method.

[0083] In the water distributor 100 installed in the vertical direction, as Figure 2 shown, multiple manifolds all extend in the horizontal direction and are arranged in the vertical direction. The projections of the multiple manifolds on the vertical plane form a water distribution area (i.e., the cross-section of water distribution in the aforementioned water storage space, and at this time, the cross-section of water distribution is a vertical plane). All rows of water outlet manifolds 130 are submerged in water. When the water depth increases, the static pressure faced by the water passing holes 140 increases, and it becomes more difficult for the water flow in the water outlet manifold to be discharged through the water passing holes. At this time, the consideration of gravity needs to be taken into account. Along the vertical direction downward, the water pressure in the lower-positioned water outlet manifold has a more obvious increasing effect obtained from the gravity field, which is beneficial to discharging the water flow in the water outlet manifold. Therefore, at this time, the end of the water inlet pipe 110 is higher than the water distribution area, and the first-stage distribution pipe is set at the top, away from the bottom-row water inlet manifold, and so on: the second-stage distribution pipe is located at a position close to the top of the rows of water outlet manifolds covered by the second-stage distribution pipe,...

[0084] In the water collector 200 installed in the vertical direction, as Figure 4 shown, multiple manifolds all extend in the horizontal direction and are arranged in the vertical direction. The projections of the multiple manifolds on the vertical plane form a water collection area (i.e., the cross-section of water absorption in the aforementioned water storage space, and at this time, the cross-section of water absorption is a vertical plane). All rows of water inlet manifolds 230 are submerged in water. When the water depth increases, the static pressure on the inlet side of the water passing holes 240 increases, and the water in the tank or box is more likely to enter the water collector through the water passing holes. At this time, the consideration of gravity needs to be taken into account. Along the vertical direction upward, the water pressure in the lower-positioned water inlet manifold has a more obvious inhibitory effect given by the gravity field, which is not conducive to the water flow in the water inlet manifold flowing towards the water outlet pipe 210. The end of the water outlet pipe 210 extends to the water collection area and is located in the upper part of the water collection area. The midpoint position of the first-stage distribution pipe 221 is connected to the end of the water outlet pipe 210, and two or more second-stage distribution pipes 222 are symmetrically or evenly spaced and connected to the first-stage distribution pipe 221,... and so on.

[0085] In the water distributor 100 and water collector 200 installed in the horizontal direction, as Figure 1 andFigure 3 As shown, multiple manifolds all extend in the horizontal direction and are arranged horizontally. The projections of the multiple manifolds on the horizontal plane form a water distribution area or a water collection area. The outlet manifolds 130 or the inlet manifolds 230 of all rows are located at the same height position in the vertical direction, and the influence of the water depth and the gravitational field on each outlet manifold 130 or inlet manifold 230 is equal. At this time, the end of the main water pipe (the outlet pipe 210 or the inlet pipe 110) extends to the central position of the water distribution area or the water collection area. The midpoint position of the first-stage distribution pipe is connected to the end of the main water pipe. The first-stage distribution pipe is arranged at the middle position of the outlet manifolds of all rows, which is beneficial to evenly distribute the static pressure in each outlet manifold. The second-stage distribution pipe is located at the middle position of the outlet manifolds or inlet manifolds of the number of rows covered by the second-stage distribution pipe, and so on.

[0086] In a second aspect, an embodiment of the present application provides a cold storage device (not shown in the figure). The cold storage device includes a cold storage device, a cold-using pipeline, and the water flow distribution device according to any one of the first aspects. One of the two water flow distribution devices serves as a water distributor, and the other serves as a water collector. The cold storage device is provided with a water storage space. The water distributor and the water collector are oppositely arranged in the water storage space and are respectively connected to both ends of the cold-using pipeline through their respective main water pipes.

[0087] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0088] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A water flow distribution device, used as a water distributor to supply water to a water storage space, or used as a water collector to discharge water from a water storage space, characterized in that: include: A main water pipe, used for inputting or outputting water flow to the water storage space; A distribution pipe network, used to disperse the water flow input from the main water pipe, or to gather the water flow to the main water pipe for output; the distribution pipe network includes n-level distribution pipes (n≥2), which are connected step by step from the first-level distribution pipe to the n-level distribution pipe, and the number of each-level distribution pipe increases relative to the previous-level distribution pipe connected thereto, and the first-level distribution pipe is connected to the main water pipe; a connecting pipe, which is arranged in a radial direction of the n-th-stage distribution pipe and penetrates the n-th-stage distribution pipe; A manifold, connected to the connecting pipe and provided with a plurality of water holes, wherein the water holes are used to communicate with the water storage space; Wherein, a throttling hole is provided on the tube wall of the connecting tube, so that the manifold is connected with the n-th stage distribution tube through the throttling hole, and the aperture of the throttling hole is smaller than the tube diameter of the n-th stage distribution tube.

2. The water flow distribution device according to claim 1, characterized in that: The throttling hole is arranged on a side of the connecting pipe which faces away from the water flow direction in the n-th stage distribution pipe.

3. The water flow distribution device according to claim 1, characterized in that: When the water flow distribution device is used as a water distributor: The ratio of the cross-sectional area of ​​the throttling hole to the cross-sectional area of ​​the n-th stage distribution pipe where the throttling hole is located is in the range of (0.1-0.5) to increase the flow velocity at the throttling hole.

4. The water flow distribution device according to claim 1, characterized in that: When the water flow distribution device is used as a water collector, it is set as follows: The sum of the cross-sectional areas of the multiple water holes on each manifold is S1, the cross-sectional area of ​​the throttling hole on the connecting pipe connected to each manifold is S2, the sum of the cross-sectional areas of the throttling holes on the multiple connecting pipes in the water flow distribution device is S3, and the cross-sectional area of ​​the main water pipe is S4; Among them, S2<S1, and S4<S3.

5. The water flow distribution device according to claim 4, characterized in that: The ratio of S2 to S1 ranges from 0.2 to 0.

7.

6. The water flow distribution device according to claim 1, characterized in that: A plurality of rows of water holes are arranged at intervals around the axis of the manifold, and each row of water holes includes a plurality of water holes arranged at intervals along the extending direction of the manifold.

7. The water flow distribution device according to claim 6, characterized in that: The interval angle between two adjacent rows of water holes around the axis of the manifold is 30-150 degrees.

8. The water flow distribution device according to claim 7, characterized in that: Two adjacent rows of water holes are staggered in the extension direction of the manifold.

9. The water flow distribution device according to claim 1, characterized in that: The manifold comprises a first manifold, one end of which is closed and the other end is connected to the n-th level distribution pipe through the connecting pipe, and the first manifold has a plurality of water holes arranged in rows at intervals along the extension direction of the first manifold.

10. The water flow distribution device according to claim 9, characterized in that: The cross-sectional areas of the plurality of water holes on the first manifold are equal, and: When the water flow distribution device is used as a water distributor: The distance between two adjacent water holes in the same row on the first manifold gradually increases in a direction away from the n-th level distribution pipe; or When the water flow distribution device is used as a water collector: The distance between two adjacent water holes in the same row on the first manifold gradually decreases in a direction away from the n-th level distribution pipe.

11. The water flow distribution device according to claim 1, characterized in that: The manifold also includes a second manifold, which is arranged between two adjacent n-level distribution pipes, one end of the second manifold is connected to one of the n-level distribution pipes through a connecting pipe, and the other end is connected to another n-level distribution pipe through another connecting pipe, and the second manifold has a plurality of water holes arranged in rows at intervals along the extension direction of the second manifold.

12. The water flow distribution device according to claim 11, characterized in that: The cross-sectional areas of the plurality of water holes on the second manifold are equal, and: When the water flow distribution device is used as a water distributor: The distance between two adjacent water holes in the same row on the second manifold gradually decreases from the two ends of the second manifold to the midpoint of the second manifold; or When the water flow distribution device is used as a water collector: The distance between two adjacent water holes in the same row on the second manifold gradually increases from the two ends of the second manifold to the midpoint of the second manifold.

13. The water flow distribution device according to claim 1, characterized in that: One end of the n-th level distribution pipe is connected to the n-1-th level distribution pipe, and the diameter of the n-th level distribution pipe decreases in a direction away from the n-1-th level distribution pipe.

14. The water flow distribution device according to claim 1, characterized in that: The percentage range of the water flow rate in each distribution pipe and the water flow rate in the next distribution pipe connected thereto is 30-110%.

15. The water flow distribution device according to claim 1, characterized in that: The multiple manifolds all extend in the horizontal direction and are arranged in the horizontal direction, and the projections of the multiple manifolds on the horizontal plane form a water distribution area or a water collection area; the end of the main water pipe extends to the center of the water distribution area or the water collection area, and the midpoint of the first-level distribution pipe is connected to the end of the main water pipe; or The multiple manifolds extend in the horizontal direction and are arranged in the vertical direction, and the projections of the multiple manifolds on the vertical plane form a water distribution area or a water collection area; the end of the main water pipe is higher than the water distribution area, or the end of the main water pipe extends to the water collection area and is located above the water collection area, and the midpoint of the first-level distribution pipe is connected to the end of the main water pipe.

16. A cold storage device, characterized in that: include: A cold storage device is provided with a water storage space; Use cold pipes; The two water flow distribution devices described in any one of claims 1-15 are relatively arranged in the water storage space, and are respectively connected to the two ends of the cooling pipeline through the main water pipes of the water flow distribution devices, one of the two water flow distribution devices serves as a water distributor and the other serves as a water collector.

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