Central air conditioning system and cold storage device used thereby
The cold storage device, with its staggered and meandering flow channels and optimized chamber layout, solves the problem of increased temperature gradient caused by water mixing, improves cold storage efficiency and cold capacity utilization, simplifies inspection and maintenance, and is suitable for central air conditioning systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- EXTEK ENERGY EQUIP ZHEJIANG
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-24
AI Technical Summary
Traditional water-based cooling systems suffer from water mixing, resulting in a thicker sloping temperature layer. This reduces cooling efficiency and capacity utilization. Furthermore, the structural design makes it difficult to achieve efficient storage and uniform release of cooling capacity, and maintenance is inconvenient, thus affecting the performance and widespread application of large-scale central air conditioning systems.
The system employs a staggered and meandering flow channel design and an optimized chamber layout. The liquid storage tank is divided into multiple rows of parallel cold storage chambers by a partition wall structure. Combined with bidirectional pipes and liquid distribution pipes, a staggered and meandering flow channel is formed to optimize water flow distribution. A ladder well is also provided for easy maintenance.
It effectively reduces water mixing, improves cold storage efficiency and cold energy utilization, simplifies the inspection and maintenance process, improves cold energy storage and release efficiency, and solves the technical defects existing in traditional devices.
Smart Images
Figure CN224551679U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy-saving technology for air conditioning systems, and in particular to a central air conditioning system and the cold storage device used therein. 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 thick temperature gradient layer (temperature gradient layer) between low-temperature and medium-temperature water, reducing cooling storage 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] Furthermore, the structural design of existing cold storage devices often fails to achieve efficient storage and uniform release of cold energy, especially in large central air conditioning systems, where the layout of the cold storage chamber and the design of the flow channels directly affect the overall system performance. Traditional devices also suffer from technical defects such as inconvenient maintenance and uneven liquid distribution, which severely restrict the widespread application of water-based cold storage technology. Therefore, existing technologies urgently need improvement to address these issues. Summary of the Invention
[0004] In order to solve the above problems, the purpose of this utility model is to provide a cold storage device and a central air conditioning system for a central air conditioning system, which has the advantages of improving cold storage efficiency, optimizing water flow distribution, convenient inlet and outlet liquid pipe laying, and easy inspection and maintenance.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] 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, within which at least two rows of parallel cold storage chambers are separated by a partition wall structure; each row of cold storage chambers includes inlet / outlet terminal chambers and flow terminal chambers located at both ends, and alternating cold storage energy storage chambers and fluid acceleration chambers arranged between the inlet / outlet terminal chambers and flow terminal chambers; the flow terminal chambers of adjacent rows of cold storage chambers are connected, and the width of the cold storage energy storage chamber is greater than the width of the fluid acceleration chamber, the inlet / outlet terminal chamber, and the flow terminal chamber; a first bidirectional pipe and a second bidirectional pipe are respectively connected to the same side or both sides of the liquid storage tank body and communicate with the inlet / outlet terminal chambers of the two rows of cold storage chambers; the inlet / outlet terminal chambers, the cold storage energy storage chamber, the fluid acceleration chamber, and the flow terminal chamber form an interlaced and meandering flow channel.
[0007] Furthermore, this application also proposes that the partition wall structure includes a transverse partition for dividing at least two rows of cold storage chambers within the liquid storage tank body. The transverse partition is provided with a flow port for connecting the flow terminal cavities of adjacent two rows of cold storage chambers. An upper partition has its upper end abutting against the top of the liquid storage tank body, and its lower end forming a first flow port between itself and the bottom. A lower partition has its lower end abutting against the bottom of the liquid storage tank body, and its upper end forming a second flow port between itself and the top. The upper and lower partitions are staggered to form a meandering flow channel and inlet / outlet terminal cavities, cold storage energy storage cavities, fluid acceleration cavities, and flow terminal cavities.
[0008] Furthermore, this application also proposes that the end of the liquid storage tank body is separated from the inlet and outlet liquid terminal cavities by an upper partition.
[0009] Furthermore, this application also proposes that a first liquid distribution pipe is provided at the inner end of the first bidirectional tube, and a second liquid distribution pipe is provided at the inner end of the second bidirectional tube; the first liquid distribution pipe and the second liquid distribution pipe are arranged along the length direction of the inlet and outlet liquid terminal cavity; the first liquid distribution pipe has a plurality of first liquid distribution ports distributed along its length direction, and the second liquid distribution pipe has a plurality of second liquid distribution ports distributed along its length direction.
[0010] Furthermore, this application also proposes a first flow port between the first liquid distribution port and the second liquid distribution port, with the liquid outlet direction opposite to that between the upper baffle and the inner wall of the liquid storage tank body.
[0011] Furthermore, this application also proposes that a ladder well is provided on one side of the liquid storage tank body, and inspection doors are provided on both the upper and lower partitions, or an inspection port is provided at the upper end of the liquid storage tank body corresponding to each cold storage energy storage chamber.
[0012] Furthermore, this application also proposes that the positions of the first liquid distribution pipe and the second liquid distribution pipe satisfy the following conditions: higher than the height of the first flow port at the lower end of the upper baffle; lower than the minimum design water level of the liquid storage tank body, and the minimum design water level is higher than the height of the upper end of the lower baffle.
[0013] Furthermore, this application also proposes that the cold storage chamber in the middle section is separated by a partition wall structure within the liquid storage tank body; the cold storage chamber in the middle section includes flow terminal cavities located at both ends, and cold storage energy storage cavities and fluid acceleration cavities alternately arranged between the flow terminal cavities; the flow terminal cavities on both sides of the cold storage chamber in the middle section are connected to the flow terminal cavities of their adjacent cold storage chambers.
[0014] Furthermore, this application also proposes that the liquid storage tank body is buried underground; the liquid storage tank body and the partition wall structure are made of brick-concrete materials, metal materials or polymer non-metallic materials.
[0015] As can be seen from the above, the cold storage device and central air conditioning system provided in this application effectively reduce water mixing phenomenon and improve cold storage efficiency and cold capacity utilization through the staggered and tortuous flow channel design and optimized chamber layout. At the same time, it is easy to inspect and maintain, and has the advantages of improving cold storage efficiency, optimizing water flow distribution, convenient inlet and outlet liquid pipe laying, and easy inspection and maintenance. Attached Figure Description
[0016] Figure 1 This is a top view schematic diagram of a cold storage device used in a central air conditioning system.
[0017] Figure 2 For the cold storage process Figure 1 Schematic diagram of sectional view AA.
[0018] Figure 3 For the cold storage process Figure 1 Schematic diagram of the BB section.
[0019] Figure 4 A top view schematic diagram of a cold storage device with four rows of parallel cold storage chambers provided in this application. Detailed Implementation
[0020] 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.
[0021] 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.
[0022] 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.
[0023] 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.
[0024] 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.
[0025] Example 1:
[0026] like Figure 1-4 As shown, this embodiment relates to a cold storage device for a central air conditioning system, including a liquid storage tank body 100, which is buried underground. The liquid storage tank body 100 is constructed of brick-concrete, metal, or polymer non-metallic materials. This technical solution effectively reduces the ground floor area by utilizing underground space. The brick-concrete material utilizes its compressive strength (≥10MPa) and corrosion resistance to adapt to the humid underground environment, while the metal material meets the load-bearing requirements of large-span structures through its yield strength (≥235MPa). In terms of material selection, the brick-concrete structure achieves seismic fortification through reinforced masonry, while the metal structure is reinforced with ribs to prevent deformation under groundwater pressure. Both solutions can guarantee structural stability within a 50-year design life. Compared with ground-mounted steel structure cold storage tanks, this solution saves approximately 60% of the insulation material usage and avoids fatigue cracking caused by wind loads on ground structures. The partition wall structure is constructed of brick-concrete, metal, or polymer and other non-metallic materials. Since internal partition walls bear almost no pressure, only their strength and corrosion resistance need to be considered.
[0027] Furthermore, the liquid storage tank body 100 is divided into at least two rows of parallel cold storage chambers by a partition wall structure. Each row of cold storage chambers includes inlet / outlet terminal chambers 201 and flow terminal chambers 202 located at both ends, and cold energy storage chambers 203 and fluid acceleration chambers 204 alternately arranged between the inlet / outlet terminal chambers 201 and flow terminal chambers 202. The flow terminal chambers 202 of adjacent rows of cold storage chambers are connected, and the width of the cold energy storage chamber 203 is greater than the width of the fluid acceleration chamber 204, the inlet / outlet terminal chambers 201, and the flow terminal chambers 202. The first bidirectional pipe 101 and the second bidirectional pipe 102 are respectively connected to the same side or both sides of the liquid storage tank body 100 and communicate with the inlet / outlet terminal chambers 201 of the two rows of cold storage chambers. The first bidirectional pipe 101 and the second bidirectional pipe 102 being on the same side are suitable for an even number of rows of cold storage chambers, as shown in the attached diagram. The first bidirectional pipe 101 and the second bidirectional pipe 102 being on opposite sides are suitable for an odd number of rows of cold storage chambers. An interlaced and meandering flow channel is formed between the inlet / outlet liquid terminal cavity 201, the cold storage energy storage cavity 203, the fluid acceleration cavity 204, and the flow terminal cavity 202. Specifically, the partition wall structure can adopt a combination of transverse partitions 300 and longitudinal partitions, where the transverse partitions 300 are used to separate multiple rows of cold storage chambers, and the longitudinal partitions are used to form each functional chamber. As a preferred embodiment, the partition wall structure can be made of precast concrete components or welded steel plates. The width of the fluid acceleration cavity 204 can be designed as needed to achieve a flow rate increase effect.
[0028] This technical solution utilizes a liquid storage tank body 100 and a specifically arranged chamber structure to form an optimized fluid path. The wider cold storage chamber 203 provides the main cold storage space, while the narrower fluid acceleration chamber 204 increases local flow velocity and reduces the area of poor flow at the corners. The staggered and meandering flow channel design reduces the volume of the temperature gradient layer, and combined with the bidirectional pipe flow control, achieves a more uniform temperature distribution. Compared with existing technologies, this solution effectively suppresses water mixing and maintains the stability of the temperature gradient layer, thereby improving cold storage efficiency and cold energy utilization. Through differentiated chamber size design, the flow velocity distribution is optimized while ensuring cold storage capacity, solving the technical problem of temperature gradient layer thickening caused by water mixing in traditional systems. In this solution, low-temperature water and medium-temperature water are clearly separated, and a distinct temperature gradient layer is generated between the medium-temperature return water and the low-temperature water; the smaller the temperature gradient layer, the better. Because the volume of water in the temperature gradient layer is small in this solution... Figure 2 and 3 The area of poor flowability E shown is relatively small. If the medium-temperature return water and the low-temperature water mix rapidly but cannot be mixed evenly, the main unit will misjudge and shut down during cold storage, thus failing to maximize cold storage.
[0029] like Figure 1As shown, the partition structure includes a transverse partition 300, an upper partition 302, and a lower partition 304. The transverse partition 300 is used to divide at least two rows of cold storage chambers within the liquid storage tank body 100. A flow port 301 is provided on the transverse partition 300 to allow communication between the flow terminal cavities 202 of adjacent rows of cold storage chambers. The upper end of the upper partition 302 abuts against the top of the liquid storage tank body 100, and a first flow port 303 is formed between its lower end and the bottom. The lower end of the lower partition 304 abuts against the bottom of the liquid storage tank body 100, and a second flow port 305 is formed between its upper end and the top. Specifically, the lower partition 304 is generally fixed to the bottom of the liquid storage tank body 100 using a solid connection. The upper partition 302 is fixed to the top of the liquid storage tank body 100 using either direct fixing or bottom support of the lower partition. Specifically, the bottom of the upper partition is supported by spaced-out feet, thus preserving the first flow port 303 at the bottom while achieving top contact. The upper partition 302 and lower partition 304 are staggered to form a meandering flow channel and inlet / outlet terminal cavities 201, a cold storage and energy storage cavity 203, a fluid acceleration cavity 204, and a flow terminal cavity 202. Specifically, the flow port 301 of the transverse partition 300 can be circular, square, or other regular-shaped openings, with its size determined according to the fluid flow requirements. The upper partition 302 can be fixed to the top using welding, bolting, or precast concrete integral molding. The height of the first flow port 303 is adjusted by changing the distance between the lower end of the upper partition 302 and the bottom. The lower baffle 304 is fixed to the bottom in a similar way to the upper baffle 302. The height of the second flow port 305 is achieved by adjusting the distance between the upper end and the top of the lower baffle 304. Specific implementations of the staggered arrangement include: the upper baffle 302 and the lower baffle 304 are arranged non-overlapping on the horizontal projection plane, with the distance between them designed according to the fluid velocity requirements; or the upper baffle 302 and the lower baffle 304 are arranged alternately along the fluid direction to form a continuous S-shaped flow channel.
[0030] To address this, the technical solution utilizes transverse baffles 300 to achieve lateral separation of multiple rows of chambers while maintaining fluid connectivity between adjacent rows. The staggered arrangement of the upper baffle 302 and lower baffle 304 forms alternating vertical flow channels, forcing the fluid to undergo vertical meandering motion while flowing laterally. This reduces the formation of flow dead zones. Compared to existing technologies, this structural design significantly reduces the volume of the temperature gradient layer between medium-temperature and low-temperature water, thereby improving both the cold storage and release rates.
[0031] Furthermore, this application proposes that the end of the liquid storage tank body 100 is separated from the inlet and outlet liquid terminal cavities 201 by an upper partition 302. This technical solution uses the rigid physical barrier formed at the end by the upper partition 302 to precisely divide the fluid channel into functionally independent inlet and outlet liquid terminal cavities 201. The upper partition 302 and the fixed-height first flow port 303 formed at the bottom ensure necessary communication between the cold energy storage chamber 203 and the inlet and outlet liquid terminal cavities 201, while effectively preventing fluid mixing caused by turbulence. In specific implementation, the independent partitioning design of the inlet and outlet liquid terminal cavities 201 allows the initial water flow during pump startup to quickly form a stable flow pattern. The first flow port 303 connecting the inlet and outlet liquid terminal cavities 201 and the cold energy storage chamber 203 is located at the bottom of the liquid storage tank, preventing significant cavitation during the initial pump startup phase.
[0032] like Figure 1 As shown, a first liquid distribution pipe 401 is provided at the inner end of the first bidirectional pipe 101, and a second liquid distribution pipe 402 is provided at the inner end of the second bidirectional pipe 102. The first liquid distribution pipe 401 and the second liquid distribution pipe 402 are arranged along the length direction of the inlet and outlet liquid terminal cavity 201. The first liquid distribution pipe 401 has multiple first liquid distribution ports 403 distributed along its length direction, and the second liquid distribution pipe 402 has multiple second liquid distribution ports 404 distributed along its length direction. Specifically, the first liquid distribution pipe 401 and the second liquid distribution pipe 402 can adopt a pipe structure with equal diameter or variable diameter. The variable diameter pipe is designed to gradually narrow or expand along the fluid direction to adapt to the flow distribution requirements of different sections. The arrangement of the liquid distribution ports includes linear equidistant distribution, staggered distribution, or density gradient distribution. The density gradient distribution can adjust the number of local liquid distribution ports according to the fluid resistance characteristics of the inlet and outlet liquid terminal cavity 201. Therefore, this technical solution achieves axial fluid distribution through a distribution pipe arranged longitudinally along the chamber, combined with a radial diffusion design with multiple distribution ports, forming a uniform flow field distribution in three-dimensional space. The symmetrically arranged bidirectional distribution pipe structure eliminates flow deviation caused by unidirectional flow, while the multi-point distribution of the distribution ports effectively reduces local velocity peaks and avoids fluid short-circuiting. Compared with conventional single-point water inlet methods, this design enables the chilled water to form a stable laminar flow state within the inlet and outlet liquid terminal cavities 201.
[0033] Furthermore, the liquid outlets 403 and 404 are positioned opposite to the first flow port 303 between the upper partition 302 and the inner wall of the storage tank body 100. This technical solution controls the initial fluid movement direction; since the liquid outlet direction is opposite to the first flow port 303, it prevents water from directly short-circuiting into adjacent chambers, thereby reducing turbulent mixing. Simultaneously, the guiding effect of the first flow port 303, combined with the directional liquid outlet, forms an orderly meandering flow channel, effectively suppressing the thickening of the thermocline layer. Compared with existing technologies, this solution significantly improves cold storage efficiency through this simple structural improvement of optimizing the liquid distribution direction, solving the problem of low cold storage efficiency caused by free diffusion in traditional devices.
[0034] Furthermore, a ladder shaft 500 is provided on one side of the liquid storage tank body 100. Inspection doors 501 are provided on both the upper partition 302 and the lower partition 304, or inspection ports are provided at the upper end of the liquid storage tank body 100 corresponding to each cold storage chamber 203. The ladder shaft 500 is constructed of steel or cast concrete, with anti-slip steps inside, and an openable waterproof cover on top. The inspection doors 501 are sealed hinged doors with rubber sealing strips around the door frame, and the door thickness matches the partition thickness. The inspection ports are circular or rectangular openings. The ladder shaft 500 is rigidly connected to the liquid storage tank body 100 via embedded parts, and a waterproof sealing layer is provided at the connection point. This technical solution provides a vertical maintenance passage through the ladder shaft 500, allowing maintenance personnel to easily access the bottom of the liquid storage tank. The installation of inspection doors 501 or inspection ports allows critical components to be directly exposed to the operating space. The partition inspection door 501 facilitates the cleaning of deposits inside the flow channel, while the energy storage chamber inspection port eliminates the need for a separate inspection door. Maintenance and internal deposit cleaning are performed through the inspection port. The two maintenance methods can be selected based on site space conditions: the partition inspection door 501 option is preferred when the space above the storage tank is limited; the independent inspection port option is more efficient when frequent checks of the energy storage chamber's internal condition are required.
[0035] like Figure 2 and 3 As shown, the positions of the first liquid distribution pipe 401 and the second liquid distribution pipe 402 satisfy the following conditions: higher than the height of the first flow port 303 at the lower end of the upper partition 302; lower than the minimum design water level of the storage tank body 100, and the minimum design water level is higher than the height of the upper end of the lower partition 304. This technical solution achieves coordinated control through triple height constraints: Firstly, considering the submersible liquid distribution to ensure stable water flow distribution and prevent air from entering the flow channel when the water pump cavities, the positions of the first liquid distribution pipe 401 and the second liquid distribution pipe 402 must be lower than the minimum design water level of the storage tank body 100. Secondly, further considering the need to fully utilize the cold storage device within the inlet and outlet liquid terminal cavities 201, the first liquid distribution pipe 401 and the second liquid distribution pipe 402 must be higher than the height of the first flow port 303 at the lower end of the upper partition 302 and as close as possible to the minimum design water level of the storage tank body 100.
[0036] In addition, such as Figure 4As shown, a middle section of the cold storage chamber can be separated within the liquid storage tank body 100 by a partition wall structure. The middle section of the cold storage chamber includes flow terminal cavities 202 located at both ends, and alternating cold storage energy storage cavities 203 and fluid acceleration cavities 204 between the flow terminal cavities 202. The flow terminal cavities 202 on both sides of the middle section of the cold storage chamber are connected to the flow terminal cavities 202 of their adjacent cold storage chambers. Specifically, the middle section of the cold storage chamber refers to having three or more rows of cold storage chambers. Since the middle section of the cold storage chamber does not need to be connected to the first bidirectional pipe 101 and the second bidirectional pipe 102, flow terminal cavities 202 are provided at both ends. The symmetrical layout of the flow terminal cavities 202, the alternating arrangement of the cold storage energy storage cavities 203 and the fluid acceleration cavities 204, and the communication structure of the flow terminal cavities 202 are all described. These features work synergistically as follows: the intermediate chamber achieves bidirectional fluid transport through the two end flow terminal cavities 202; the alternating energy storage and acceleration cavities form a continuous meandering flow channel; and the direct connection of the flow terminal cavities 202 ensures unobstructed flow between adjacent chambers. This solution establishes a symmetrical fluid channel network by standardizing the intermediate chamber structure, enabling uniform distribution of the refrigerant in multiple parallel flow channels and avoiding localized flow dead zones. Thus, this technical solution solves the technical problem of efficient fluid communication between multiple rows of parallel cold storage chambers through the standardized design of the intermediate cold storage chamber. Compared with existing technologies, its advantages are mainly reflected in the following aspects: The symmetrically arranged flow terminal cavities 202 achieve direct communication between adjacent chambers, eliminating the flow resistance caused by complex connection structures in traditional designs; the alternating cold storage chambers 203 and fluid acceleration chambers 204 form a continuous meandering flow channel, ensuring both cold storage capacity and optimizing fluid distribution uniformity through the narrow channel design of the acceleration chamber; the flow terminal cavities 202 at both ends of the intermediate chamber simplify the piping layout of multi-row parallel systems, reducing manufacturing costs and maintenance difficulty. This design effectively avoids the formation of local flow dead zones, improves the distribution efficiency of the refrigerant in the parallel flow channels, and thus enhances the overall cold storage and release performance.
[0037] 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.
[0038] Example 2:
[0039] This embodiment proposes a central air conditioning system including a cold storage device. The cold storage device employs the closed-loop liquid storage tank body 100 described in Embodiment 1. This technical solution reduces the thickness of the thermocline layer through physical isolation and flow channel optimization. The chambers divided by the partition wall structure reduce water flow mixing, the width design of the cold storage energy storage chamber 203 increases the cold energy storage space, the fluid acceleration chamber 204 optimizes the flow velocity distribution, and the bidirectional pipe and liquid distribution port cooperate to achieve uniform water flow distribution. Compared with the prior art, this solution does not require additional control devices and directly improves the efficiency of cold energy storage and release through hardware structure improvements, solving the problems of increased thermocline layer thickness and low cold energy utilization caused by water flow mixing in traditional systems.
[0040] 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.
[0041] 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 liquid storage tank body (100) is divided by a partition wall structure into at least two rows of parallel cold storage chambers; - Each row of cold storage chambers includes an inlet / outlet liquid terminal chamber (201) and a flow terminal chamber (202) located at both ends, as well as a cold storage energy storage chamber (203) and a fluid acceleration chamber (204) alternately arranged between the inlet / outlet liquid terminal chamber (201) and the flow terminal chamber (202); - The flow terminal cavities (202) of two adjacent rows of cold storage chambers are connected. The chamber width of the cold storage energy storage chamber (203) is greater than the chamber width of the fluid acceleration chamber (204), the liquid inlet / outlet terminal cavity (201) and the flow terminal cavity (202). - The first bidirectional pipe (101) and the second bidirectional pipe (102) are respectively connected to the same side or both sides of the liquid storage tank body (100) and communicate with the inlet and outlet terminal cavities (201) of the two rows of cold storage chambers; The inlet / outlet liquid terminal cavity (201), the cold storage energy storage cavity (203), the fluid acceleration cavity (204), and the flow terminal cavity (202) 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: - A transverse partition (300) is used to divide at least two rows of cold storage chambers within the liquid storage tank body (100). The transverse partition (300) is provided with a flow port (301) for connecting the flow terminal cavities (202) of two adjacent rows of cold storage chambers. - Upper partition (302), the upper end of which abuts against the top of the liquid storage tank body (100), and the lower end of which forms a first flow port (303) between the bottom; - Lower partition (304), the lower end of which abuts against the bottom of the liquid storage tank body (100), and the upper end forms a second flow port (305) between the top and the top; - The upper partition (302) and the lower partition (304) are staggered to form the meandering flow channel and the inlet and outlet liquid terminal cavity (201), the cold storage energy storage cavity (203), the fluid acceleration cavity (204) and the flow terminal cavity (202).
3. The cold storage device for a central air conditioning system according to claim 2, characterized in that, The end of the liquid storage tank body (100) is separated from the inlet and outlet liquid terminal cavity (201) by the upper partition (302).
4. The cold storage device for a central air conditioning system according to claim 2, characterized in that, - The inner end of the first bidirectional tube (101) is provided with a first liquid distribution tube (401), and the inner end of the second bidirectional tube (102) is provided with a second liquid distribution tube (402). - The first liquid distribution pipe (401) and the second liquid distribution pipe (402) are arranged along the length direction of the inlet and outlet liquid terminal cavity (201); - The first liquid distribution pipe (401) has a plurality of first liquid distribution ports (403) distributed along its length direction, and the second liquid distribution pipe (402) has a plurality of second liquid distribution ports (404) distributed along its length direction.
5. The cold storage device for a central air conditioning system according to claim 4, characterized in that, - The liquid outlets of the first liquid outlet (403) and the second liquid outlet (404) are opposite to the first flow outlet (303) between the upper partition (302) 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 (500) is provided on one side of the liquid storage tank body (100), and an inspection door (501) is provided on the upper partition (302), lower partition (304) and transverse partition (300), or an inspection port is provided on the upper end of the liquid storage tank body (100) corresponding to each cold storage energy storage chamber (203).
7. The cold storage device for a central air conditioning system according to claim 4, characterized in that, - The positions of the first liquid distribution pipe (401) and the second liquid distribution pipe (402) satisfy the following: a) The height is higher than the height of the first flow port (303) at the lower end of the upper partition (302); b) The water level is lower than the minimum design water level of the liquid storage tank body (100), and the minimum design water level is higher than the height of the upper end of the lower partition (304).
8. The cold storage device for a central air conditioning system according to claim 1, characterized in that, -The cold storage chamber in the middle section is separated by the partition wall structure inside the liquid storage tank body (100); - The cold storage chamber in the middle section includes flow terminal chambers (202) located at both ends, and cold storage energy storage chambers (203) and fluid acceleration chambers (204) alternately arranged between the flow terminal chambers (202); - The flow terminal cavities (202) on both sides of the cold storage chamber in the middle section are connected to the flow terminal cavities (202) of the adjacent cold storage chamber.
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 below the 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.