Central air conditioning system and cold storage device used thereby

Abstract

The utility model relates to central air conditioning system energy -conserving technical field especially, a kind of central air conditioning system and the cold storage device it uses, including liquid storage pool body;First two-way pipe and second two-way pipe are connected respectively at the both sides of liquid storage pool body;The end chamber of two sides in the liquid storage pool body is separated by partition structure, and liquid storage chamber and acceleration passage are alternately arranged between the end chamber of two sides;The chamber width of the liquid storage chamber is greater than the chamber width of acceleration passage;First two-way pipe and second two-way pipe are communicated with the end chamber of two sides respectively, and the end chamber, liquid storage chamber and acceleration passage form staggered circuit between each other.The scheme has the advantages of improving cold storage efficiency, reducing water flow mixing phenomenon, simplifying liquid distributor structure, preventing water pump start-stop stage pipeline evacuation, optimizing partition wall design and the like.

Description

Technical Field

[0001] This utility model relates to the field of energy-saving technology for central air conditioning systems, and in particular to a cold storage device for central air conditioning systems. Background Technology

[0002] With the growth of energy demand and the widening gap between peak and off-peak electricity prices, energy-saving technologies for central air conditioning systems have become a research hotspot. Water-based cooling technology, by storing cooling capacity during off-peak electricity hours and releasing it during peak hours, significantly reduces operating costs and has become an important means of energy conservation in large buildings. However, traditional water-based cooling systems still face the following problems in practical applications: In conventional liquid storage tank designs, water mixing is common, resulting in a relatively large temperature gradient layer (temperature gradient layer) between low-temperature and medium-temperature water, reducing cooling efficiency and cooling capacity utilization. Improper control of water flow velocity may lead to abnormal shutdown of the main unit or insufficient release of cooling capacity.

[0003] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a cold storage device for central air conditioning systems, which offers advantages such as improved cold storage efficiency, reduced water mixing, simplified liquid distributor structure, prevention of pipe cavitation during pump start-up and shutdown, and optimized partition wall design.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This application provides a cold storage device for a central air conditioning system, the technical solution of which is as follows: it includes a liquid storage tank body; a first bidirectional pipe and a second bidirectional pipe, respectively connected to both sides of the liquid storage tank body; the liquid storage tank body is divided into two end chambers by a partition wall structure, and a liquid storage chamber and an acceleration channel are alternately arranged between the two end chambers; the width of the liquid storage chamber is greater than the width of the acceleration channel; the first bidirectional pipe and the second bidirectional pipe are respectively connected to the two end chambers, and the end chambers, the liquid storage chambers and the acceleration channel form an interlaced and meandering flow channel.

[0006] Furthermore, this application also proposes that the partition wall structure includes an upper partition plate, the upper end of which abuts against the top of the liquid storage tank body, and the lower end of which has a flow port at the bottom; a lower partition plate, the lower end of which abuts against the bottom of the liquid storage tank body, and the upper end of which has a flow port at the top; the upper partition plate and the lower partition plate are staggered to form the meandering flow channel and alternating liquid storage chambers and acceleration channels.

[0007] Furthermore, this application also proposes that one side of the liquid storage tank body is separated into an end chamber by a lower partition, and the other side is separated into an end chamber by an upper partition.

[0008] Furthermore, this application also proposes that the inner end of the first bidirectional tube is provided with a first liquid distribution tube, and the inner end of the second bidirectional tube is provided with a second liquid distribution tube; the first liquid distribution tube and the second liquid distribution tube are arranged along the length direction of the end chamber; the first liquid distribution tube has a plurality of first liquid distribution ports regularly distributed along its length direction, and the second liquid distribution tube has a plurality of second liquid distribution ports regularly distributed along its length direction.

[0009] Furthermore, this application also proposes that the discharge direction of the first liquid distribution port and the second liquid distribution port is configured to flow away from the upper or lower partition plate adjacent to it and the inner wall of the liquid storage tank body.

[0010] Furthermore, this application also proposes that a ladder well is provided on one side of the liquid storage tank body, and that inspection doors are provided on both the upper and lower partitions.

[0011] The liquid storage tank body is buried under the lawn or ground; the liquid storage tank body and partition wall structure are made of brick-concrete materials, metal materials or polymer non-metallic materials.

[0012] Furthermore, this application also proposes that the height of the lower partition at the end is lower than the height of the other lower partitions to form a larger flow port and prevent cavitation during the initial start-up of the water pump when the system is storing cold; the installation position of the first liquid distribution pipe is lower than the upper end face of the lower partition to prevent the system water from directly entering and exiting the liquid storage chamber, which would cause the water in the end chamber connected to the first liquid distribution pipe to not flow.

[0013] Furthermore, this application also proposes that the location of the second liquid distribution pipe simultaneously satisfies: a) Higher than the height of the flow inlet at the lower end of the upper partition; b) The water level is lower than the minimum design water level of the liquid storage tank body, wherein the minimum design water level is set to be higher than the upper end of the lower partition.

[0014] On the one hand, it can prevent the water pump from cavitating during the initial start-up of the system when releasing coolness, and on the other hand, it can ensure the utilization rate of the upper end of the end chamber.

[0015] As can be seen from the above, the cold storage device and central air conditioning system provided in this application effectively improve the cold storage efficiency, reduce water mixing phenomenon, simplify the liquid distributor structure, prevent pipeline cavitation during water pump start-up and shutdown, and optimize the partition wall design by setting up the liquid storage tank body, partition wall structure, bidirectional pipe and liquid distribution pipe. It has significant energy-saving effect and system stability. Attached Figure Description

[0016] Figure 1 A schematic diagram of a cold storage device provided in this application in the state of releasing cold.

[0017] Figure 2 A schematic diagram of a cold storage device provided in this application in a cold storage state.

[0018] Figure 3 This is a top view schematic diagram of a cold storage device provided in this application. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example 1

[0024] like Figure 1-3 As shown, this embodiment relates to a cold storage device for a central air conditioning system, including a liquid storage tank body 100; a first bidirectional pipe 101 and a second bidirectional pipe 102, respectively connected to both sides of the liquid storage tank body 100; the liquid storage tank body 100 is divided into two end chambers 103 by a partition wall structure, and a liquid storage chamber 104 and an acceleration channel 105 alternately arranged between the two end chambers 103; the width of the liquid storage chamber 104 is greater than the width of the acceleration channel 105; the first bidirectional pipe 101 and the second bidirectional pipe 102 are respectively connected to the two end chambers 103, and the end chambers 103, the liquid storage chambers 104, and the acceleration channel 105 form an interlaced and meandering flow channel. The liquid storage tank body 100 can prevent the influence of the external environment on the cold storage process, ensuring temperature stability. The arrangement of the first bidirectional pipe 101 and the second bidirectional pipe 102 allows water to flow in both directions, thereby forming a cold storage process and a cold release process, improving the flexibility of the system. The partition structure design divides the interior of the liquid storage tank body 100 into an end chamber 103, a liquid storage chamber 104, and an acceleration channel 105, forming an interlaced and meandering flow channel. This design effectively improves the uniformity of water flow distribution, enhances the temperature stratification effect, and reduces water flow mixing, thereby improving the cold storage efficiency and cold energy utilization rate.

[0025] Specifically, the width of the liquid storage chamber 104 is greater than the width of the acceleration channel 105. This design optimizes the water flow velocity, allowing the water to fully store cold within the liquid storage chamber 104 and flow rapidly within the acceleration channel 105, thus improving the overall system efficiency. The first bidirectional pipe 101 and the second bidirectional pipe 102 are respectively connected to the end chambers 103 on both sides. The water flow needs to pass through the end chambers 103 to enter the liquid storage chamber 104, thereby limiting the flow velocity of the water flowing into the liquid storage chamber 104 and preventing a decrease in cold storage and release efficiency due to rapid mixing of the water flow.

[0026] Furthermore, by constructing an acceleration channel 105 between two adjacent liquid storage chambers 104, the water flow velocity entering the next liquid storage chamber 104 can be appropriately increased, for example, from 0.1m / s~0.2m / s to 0.5m / s~0.6m / s. When the inlet flow velocity of the liquid storage chamber 104 is appropriately increased, the range of the corner area with poor flowability can be reduced, i.e., the shaded area at the corner of the liquid storage chamber 104 in the figure.

[0027] Therefore, the technical solution of this application effectively solves the technical problems of poor temperature stratification, high cost of liquid distributor, frequent cavitation, and low space utilization in the cold storage device of the central air conditioning system by optimizing the internal structure and flow channel design of the liquid storage tank body 100. Compared with the prior art, this application has higher cold storage efficiency and cold capacity utilization, while reducing the complexity and cost of the liquid distributor, and improving the stability and space utilization of the system.

[0028] like Figure 1 and 2 As shown, the partition structure includes an upper partition 201, whose upper end abuts against the top of the liquid storage tank body 100, and whose lower end and bottom have flow ports 202; and a lower partition 203, whose lower end abuts against the bottom of the liquid storage tank body 100, and whose upper end and top have flow ports 202. The upper partition 201 and lower partition 203 are staggered to form a meandering flow channel and alternating liquid storage chambers 104 and acceleration channels 105. Specifically, the lower partition 203 abuts against the bottom of the liquid storage tank body 100 in a solid connection manner, while the upper partition 201 abuts against the top of the liquid storage tank body 100 in two ways: direct fixing or bottom support of the lower partition. That is, the bottom of the upper partition is supported by spaced-out legs, which preserves the flow ports 202 at the bottom while achieving a top abutment. The staggered arrangement of the upper partition 201 and lower partition 203 can be achieved in various ways. For example, the upper baffle 201 can be located on the left side of the liquid storage tank body 100, while the lower baffle 203 is located on the right side, with the two offset by a certain distance in the vertical direction, forming a meandering flow channel. Furthermore, the size and shape of the flow inlet 202 can be adjusted according to actual needs to optimize the water flow distribution. In this regard, the partition wall structure, through the staggered arrangement of the upper baffle 201 and the lower baffle 203, forms a meandering flow channel and alternating liquid storage chambers 104 and acceleration channels 105. This structure can effectively reduce water mixing and enhance temperature stratification. The design of the flow inlets 202 of the upper baffle 201 and the lower baffle 203 further optimizes the water flow distribution, allowing for better separation of low-temperature water and medium-temperature water, thereby improving cold storage efficiency and cold energy utilization. Through this partition wall structure design, the cold storage device can more effectively solve the problem of poor temperature stratification caused by water mixing. Compared with existing technologies, this technical solution not only simplifies the structure and reduces costs but also improves the stability and efficiency of the system.

[0029] Furthermore, one side of the liquid storage tank body 100 is divided into an end chamber 103 by a lower partition 203, and the other side is divided into an end chamber 103 by an upper partition 201. The lower end of the lower partition 203 abuts against the bottom of the liquid storage tank body 100, while its upper end and top have flow ports 202; the upper end of the upper partition 201 abuts against the top of the liquid storage tank body 100, while its lower end and bottom have flow ports 202. This structural design effectively solves the problem of poor temperature stratification in traditional water-based cold storage systems. Specifically, the arrangement of the upper partition 201 and lower partition 203 allows water to converge within the end chamber 103, avoiding water mixing and thus optimizing the water flow path and improving cold storage efficiency. Therefore, the technical solution of this application not only simplifies the partition structure and reduces manufacturing costs but also significantly improves the performance and stability of the cold storage device.

[0030] Furthermore, a first liquid distribution pipe 301 is provided at the inner end of the first bidirectional pipe 101, and a second liquid distribution pipe 302 is provided at the inner end of the second bidirectional pipe 102; the first liquid distribution pipe 301 and the second liquid distribution pipe 302 are arranged along the length direction of the end chamber 103; the first liquid distribution pipe 301 has a plurality of first liquid distribution ports 303 regularly distributed along its length direction, and the second liquid distribution pipe 302 has a plurality of second liquid distribution ports 304 regularly distributed along its length direction. Specifically, the design of the first liquid distribution pipe 301 and the second liquid distribution pipe 302 allows the water flow to be evenly distributed throughout the entire end chamber 103. The first liquid distribution pipe 301 and the second liquid distribution pipe 302 have a plurality of first liquid distribution ports 303 and second liquid distribution ports 304 regularly distributed on them, and the regular distribution of these ports allows the water flow to enter the storage tank evenly, avoiding the phenomenon of excessively fast or slow local water flow. As a preferred embodiment, the diameters of the first liquid distribution ports 303 and the second liquid distribution ports 304 can be adjusted according to actual needs to ensure uniform water flow distribution. Furthermore, the spacing of the liquid distribution ports can be optimized based on the length of the end chamber 103 and the water flow velocity to further improve the temperature stratification effect. Thus, this technical solution, through the arrangement of the first liquid distribution pipe 301 and the second liquid distribution pipe 302, and the regularly distributed liquid distribution ports on them, effectively solves the water mixing phenomenon caused by uneven liquid distribution in the cold storage device. Uniform liquid distribution reduces the phenomenon of excessively fast or slow local water flow, thereby improving the temperature stratification effect and reducing the occurrence of water mixing. Compared with existing technologies, this solution not only simplifies the structure of the liquid distributor and reduces manufacturing and maintenance costs, but also significantly improves the cold storage efficiency and cold energy utilization rate of the cold storage device.

[0031] Furthermore, the outlet direction of the first liquid distribution port 303 and the second liquid distribution port 304 is configured to face away from the flow port 202 formed by the adjacent upper or lower partition 201 and the inner wall of the storage tank body 100. This design, by adjusting the outlet direction of the liquid distribution port, prevents water from flowing directly to the flow port 202 when entering the storage tank, thus avoiding the problem of water flow short-circuiting. This technical means effectively utilizes the space of the end chamber 103, helps maintain the temperature stratification between low-temperature water and medium-temperature water in the storage chamber 104, and improves the cold storage efficiency and cold energy utilization rate. Specifically, the outlet direction of the first liquid distribution port 303 and the second liquid distribution port 304 can be achieved in various ways. For example, the liquid distribution port can be designed with an inclined angle so that the water flow direction is opposite to the direction of the flow port 202. In addition, the position of the liquid distribution port can also be adjusted to ensure that the water flow does not directly impact the flow port 202. Thus, this technical solution effectively avoids the occurrence of water flow short-circuiting by adjusting the outlet direction of the liquid distribution port. Compared to existing technologies, this design not only simplifies the structure of the distributor but also improves the uniformity of water flow distribution, thereby better maintaining temperature stratification within the storage tank. Therefore, this technical solution offers significant advantages in improving cold storage efficiency and cold energy utilization.

[0032] Furthermore, a ladder shaft 400 is provided on one side of the reservoir body 100, and inspection doors 401 are provided on both the upper partition 201 and the lower partition 203; the reservoir body 100 is buried under the lawn or ground; the reservoir body 100 and the partition structure are made of brick-concrete materials, metal materials, or polymer non-metallic materials. The ladder shaft 400 facilitates maintenance personnel to enter the reservoir body 100 for maintenance, and the inspection doors 401 facilitate the maintenance and repair of the partition structure. The ladder shaft 400 can be implemented using a fixed or movable ladder to ensure that maintenance personnel can safely and conveniently enter the reservoir. The inspection doors 401 can be designed as a sealed structure to prevent water leakage, while also facilitating disassembly and installation. Burying the reservoir body 100 under the lawn or ground not only saves ground space but also helps maintain the stability of the water temperature. Specifically, the burial depth can be adjusted according to local climate conditions and soil characteristics to ensure the stability of the water temperature. Using brick-concrete or metal materials to construct the liquid storage tank body 100 and its partition wall structure improves the durability and pressure resistance of the device while reducing costs. The choice of brick-concrete materials can include high-strength concrete and corrosion-resistant bricks to ensure the structural stability of the liquid storage tank during long-term use. Through the above-mentioned technical means, the installation of the ladder shaft 400 and the inspection door 401 significantly improves the convenience of maintenance and reduces maintenance time and costs. Burying the liquid storage tank body 100 underground not only saves ground space but also maintains water temperature stability through the insulation effect of the soil, thereby improving cold storage efficiency. Using brick-concrete materials to construct the liquid storage tank body 100 and its partition wall structure not only improves the durability and pressure resistance of the device but also reduces material costs, making the entire device more economical and practical. Compared with existing technologies, the technical solution of this application has significant advantages in terms of maintenance convenience, space utilization, and cost control, effectively solving the technical problems existing in the maintenance and installation of cold storage devices.

[0033] Furthermore, the height of the lower baffle 203 at the end is lower than the height of the other lower baffles 203 to form a larger flow opening 202, preventing cavitation during the initial start-up of the water pump when the system is storing cold. Specifically, the height adjustment of the lower baffle 203 at the end can be achieved in various ways. For example, the height of the lower baffle 203 at the end can be designed to be 80% to 90% of the height of the other lower baffles 203 to ensure a sufficiently large flow opening 202 at the end. In addition, the shape of the lower baffle 203 at the end can be designed as a slope or an arc to further optimize the flow path of the water. As a preferred embodiment, the height adjustment of the lower baffle 203 at the end can be achieved by directly machining it during the manufacturing process or by adjusting it during later installation. Thus, the height adjustment of the lower baffle 203 at the end can not only effectively increase the cross-sectional area of ​​the water flow channel, but also reduce sudden changes in water flow pressure and avoid the occurrence of pipe cavitation. In this regard, this application adjusts the height of the lower baffle 203 at the end to be lower than the other lower baffles 203, thereby forming a larger flow opening 202 at the end. This design effectively increases the cross-sectional area of ​​the water flow channel during system cooling, especially in the initial stage of pump startup, reducing sudden changes in water pressure and preventing pipe cavitation. In this way, this application solves the common cavitation problem in traditional water-based cooling systems, improving system stability and reliability. Compared with existing technologies, the technical solution of this application eliminates the need for complex auxiliary equipment, simplifying the system structure and reducing manufacturing costs and maintenance difficulty. Furthermore, the first liquid distribution pipe 301 is installed below the upper surface of the lower partition 203 to prevent system water from directly entering and exiting the liquid storage chamber 104, thus preventing water from flowing in the end chamber 103 connected to the first liquid distribution pipe 301.

[0034] Furthermore, the location of the second liquid distribution pipe 302 simultaneously satisfies: a) The height is higher than the flow port 202 at the lower end of the upper partition 201; b) Slightly lower than the minimum design water level of the liquid storage tank body 100, wherein the minimum design water level is set to be higher than the upper end of the lower partition 203.

[0035] The second liquid distribution pipe 302 is installed below the minimum design water level of the storage tank body 100 to prevent cavitation during the initial start-up of the water pump when the system releases cooling. The second liquid distribution pipe 302 is connected to the flow port 202 at the lower end of the upper baffle 201. Specific implementation methods for this technical feature include the following: First, the installation height of the second liquid distribution pipe 302 can be adjusted relative to its position with the flow port 202 at the lower end of the upper baffle 201 to ensure that water can smoothly enter the distribution pipe during system cooling, avoiding cavitation caused by sudden changes in water pressure. Second, the installation angle of the second liquid distribution pipe 302 can be slightly tilted to further optimize the path of water entering the distribution pipe 302 and reduce turbulence and pressure fluctuations at the flow port 202. Third, the installation position of the second liquid distribution pipe 302 can be adjusted using a fixed bracket to adapt to the structural and dimensional requirements of different storage tanks, ensuring the versatility and applicability of the technical solution. Specifically, the second liquid distribution pipe 302 is connected to the flow port 202 at the lower end of the upper baffle 201. This design ensures that water can smoothly enter the second liquid distribution pipe 302 during the initial start-up of the water pump when the system releases cooling, avoiding pipe cavitation caused by sudden changes in water pressure. This design effectively improves the stability and reliability of the system, reducing system failures and operational interruptions caused by cavitation. Compared with existing technologies, this solution does not require the addition of complex auxiliary equipment, such as vacuum suppressors, thereby reducing system complexity and cost, while improving system operating efficiency and safety.

[0036] Meanwhile, the second liquid distribution pipe 302 is positioned higher than the flow port 202 at the lower end of the upper partition 201, thus ensuring the utilization rate of the upper end of the end chamber 103.

[0037] In the specific implementation scheme, by reasonably setting the width, the liquid storage chamber 104 can accommodate more cold energy, while the narrower width of the end chamber 103 and the acceleration channel 105 helps to increase the water flow velocity, thereby optimizing the water flow distribution and flow efficiency. This design can better control the temperature and flow rate of the water flow during cold storage and release, reduce water mixing, improve the temperature stratification effect, and thus improve the cold storage efficiency and cold release efficiency. Specifically, the width of the liquid storage chamber 104 needs to effectively increase the storage space for cold energy, so that more cold energy can be stored during off-peak electricity prices at night. The relatively narrow width of the end chamber 103 and the acceleration channel 105 helps to increase the water flow velocity, so that the water flow can be more evenly distributed during cold storage and release, reducing water mixing and thus improving the temperature stratification effect. Therefore, the technical solution of this application solves the problems of severe water mixing and poor temperature stratification in traditional water cold storage systems by optimizing the width distribution of the liquid storage chamber 104, the end chamber 103, and the acceleration channel 105. Compared with existing technologies, the design of this application not only improves the cold storage efficiency and cold release efficiency, but also reduces water mixing and enhances the effect of temperature stratification, thereby achieving a more efficient water cold storage and cold release process.

[0038] like Figure 2 The diagram shows the cold storage device in cold storage mode. During nighttime cold storage, coolant (7°C, temperature for illustration only) flows from the second bidirectional pipe 102 into the storage tank body 100 and is stored in the storage chamber 104 from left to right in the diagram. Simultaneously, warm water (17°C, temperature for illustration only) is discharged from the right side. Figure 1 The diagram shows the cold storage device in the cold release state. During the daytime cold release process, warm water (17°C, temperature is only for illustration) flows from the first bidirectional pipe 102 into the liquid storage tank body 100 and is stored in the liquid storage chamber 104 from right to left in the diagram. At the same time, coolant (7°C, temperature is only for illustration) is discharged from the left side.

[0039] This system supports a variety of cooling liquids (such as cooling water, ethylene glycol solution, or nanofluids) and can adjust the capacity of the cold storage tank and pump parameters according to the specific heat capacity and thermal conductivity of the liquid to optimize system energy efficiency. Example 2

[0040] This embodiment relates to a central air conditioning system, which includes a cold storage device described in Embodiment 1. This cold storage device, through the design of a liquid storage tank body 100, bidirectional pipes, a partition wall structure, and liquid distribution pipes, achieves effective separation of low-temperature water and medium-temperature water, improving cold storage efficiency and cooling capacity utilization, while reducing the manufacturing and maintenance costs of the liquid distributor, reducing the occurrence of cavitation, and optimizing space utilization. Through the above design, the cold storage device of this application achieves effective separation of low-temperature water and medium-temperature water in a central air conditioning system, improving cold storage efficiency and cooling capacity utilization, while reducing the manufacturing and maintenance costs of the liquid distributor, reducing the occurrence of cavitation, and optimizing space utilization, thus providing a reliable solution for efficient cold storage and release in central air conditioning systems.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A cold storage device for a central air conditioning system, characterized in that, include: - Reservoir body (100); - The first bidirectional pipe (101) and the second bidirectional pipe (102) are respectively connected to both sides of the liquid storage tank body (100); - The liquid storage tank body (100) is divided into two end chambers (103) by a partition wall structure, and a liquid storage chamber (104) and an acceleration channel (105) are alternately arranged between the two end chambers (103); the width of the liquid storage chamber (104) is greater than the width of the acceleration channel (105); - The first bidirectional tube (101) and the second bidirectional tube (102) are respectively connected to the end chambers (103) on both sides, and the end chambers (103), the liquid storage chamber (104) and the acceleration channel (105) form an interlaced and meandering flow channel.

2. The cold storage device for a central air conditioning system according to claim 1, characterized in that, The partition wall structure includes: - The upper partition (201) has its upper end abutting against the top of the liquid storage tank body (100), and its lower end and bottom have flow ports (202). - The lower partition (203) has its lower end abutting against the bottom of the liquid storage tank body (100), and its upper end and top have flow ports (202). - The upper partition (201) and the lower partition (203) are staggered to form the meandering flow channel and the alternating liquid storage chamber (104) and acceleration channel (105).

3. The cold storage device for a central air conditioning system according to claim 2, characterized in that, One side of the liquid storage tank body (100) is separated into an end chamber (103) by a lower partition (203), and the other side is separated into an end chamber (103) by an upper partition (201).

4. The cold storage device according to claim 2, characterized in that, The inner end of the first bidirectional tube (101) is provided with a first liquid distribution tube (301), and the inner end of the second bidirectional tube (102) is provided with a second liquid distribution tube (302). - The first liquid distribution pipe (301) and the second liquid distribution pipe (302) are arranged along the length direction of the end chamber (103); - The first liquid distribution pipe (301) has a plurality of first liquid distribution ports (303) regularly distributed along its length direction, and the second liquid distribution pipe (302) has a plurality of second liquid distribution ports (304) regularly distributed along its length direction.

5. The cold storage device for a central air conditioning system according to claim 4, characterized in that, The discharge direction of the first liquid distribution port (303) and the second liquid distribution port (304) is configured to face away from the flow port (202) formed by the upper partition (201) or lower partition (203) adjacent to it and the inner wall of the liquid storage tank body (100).

6. The cold storage device for a central air conditioning system according to claim 2, characterized in that, - A ladder well (400) is provided on one side of the liquid storage tank body (100), and inspection doors (401) are provided on both the upper partition (201) and the lower partition (203).

7. The cold storage device for a central air conditioning system according to claim 4, characterized in that, The height of the lower baffle (203) at the end is lower than the height of the other lower baffles (203) to form a larger flow port (202) and prevent cavitation during the initial start-up of the water pump when the system is storing cold. The first liquid distribution pipe (301) is installed below the upper end face of the lower partition (203) to prevent the system water from directly entering and exiting the liquid storage chamber (104) and causing the water in the end chamber (103) connected to the first liquid distribution pipe (301) to not flow.

8. The cold storage device for a central air conditioning system according to claim 4, characterized in that, The location of the second liquid distribution pipe (302) simultaneously satisfies: a) The height is higher than the flow port (202) at the lower end of the upper partition (201); b) The water level is slightly lower than the minimum design water level of the liquid storage tank body (100), which is set to be higher than the upper end of the lower partition (203).

9. The cold storage device for a central air conditioning system according to claim 1, characterized in that, - The liquid storage tank body (100) is buried under the lawn or ground; - The liquid storage tank body (100) and partition wall structure are made of brick-concrete materials, metal materials or polymer non-metallic materials.

10. A central air conditioning system, characterized in that, Includes a cold storage device for a central air conditioning system as described in any one of claims 1-9.

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