Cool storage equipment and air conditioning system with both water cool storage and phase change cool storage functions

Abstract

The present application discloses a cold storage device and an air-conditioning system with both water cold storage and phase change cold storage functions, wherein the cold storage device includes a tank body and a low-level water distributor and a high-level water distributor arranged in the tank body, the low-level water distributor is provided with a first interface, and the high-level water distributor is provided with a second interface. When supplying cold, the cold storage device outputs chilled water supply through the first interface and inputs chilled return water through the second interface. When storing cold, the cold storage device inputs chilled water supply through the first interface and outputs chilled return water through the second interface. A middle-level water distributor and a phase change material structure are also provided in the tank body. The middle-level water distributor is located between the low-level water distributor and the high-level water distributor. A phase change cold storage section with a phase change material structure is formed below the middle-level water distributor. The middle-level water distributor is provided with a third interface. The cold storage device can perform phase change cooling. Under the phase change cooling working condition, the cold storage device outputs chilled water supply through the first interface and inputs chilled return water through the third interface.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning systems, and in particular to a cold storage device and an air-conditioning system having both water cold storage and phase change cold storage functions. Background Art

[0002] To alleviate peak electricity demand and encourage businesses to stagger their electricity use, ice and water storage for air conditioning have seen significant development. However, while these two solutions significantly reduce air conditioning energy costs and offer a high return on investment, overall electricity consumption for air conditioning has increased, particularly with ice storage, which uses over 30% more electricity. Phase change material storage, another energy- and cost-saving medium-temperature air conditioning storage method, has been abandoned by the market due to its high initial investment and long payback period, hindering its effective development. Even many within the air conditioning industry are unfamiliar with phase change storage.

[0003] Application Contents

[0004] The purpose of this application is to provide a cold storage device and air-conditioning system with both water cold storage and phase change cold storage functions, which can combine water cold storage and phase change cold storage, and thus achieve a balance between cost and energy saving.

[0005] In order to achieve the above-mentioned purpose, the present application provides a cold storage device, including a tank body and a low-level water distributor and a high-level water distributor arranged in the tank body, the low-level water distributor is provided with a first interface, the high-level water distributor is provided with a second interface, when the water is supplied with cooling, the cold storage device can output the chilled water supply through the first interface of the low-level water distributor and can input the chilled return water through the second interface of the high-level water distributor, when storing cold, the cold storage device can input the chilled water supply through the first interface of the low-level water distributor and can input the chilled return water through the second interface of the high-level water distributor The second interface outputs chilled return water, and a mid-level water distributor and a phase change material structure are also provided in the tank body. The mid-level water distributor is located between the low-level water distributor and the high-level water distributor, and a phase change cold storage section for arranging the phase change material structure is formed below the mid-level water distributor. The mid-level water distributor is provided with a third interface, and the cold storage device can perform phase change cooling. Under the phase change cooling working condition, the cold storage device outputs chilled water supply through the first interface of the low-level water distributor and inputs chilled return water through the third interface of the mid-level water distributor.

[0006] Optionally, the mid-position water distributor is arranged close to the phase change cold storage section.

[0007] Optionally, a separator is provided in the tank body, and the separator is located above the mid-position water distributor, and the separator is used to separate the water on the upper and lower sides thereof.

[0008] Optionally, the separator is a floating separator, and the floating separator floats up and down as the water temperature changes.

[0009] Optionally, a column is provided in the middle of the tank body; the floating separator is annular and sleeved on the column, and the floating separator can float up and down along the outer wall of the column and the inner wall of the tank body.

[0010] Optionally, the floating separator includes an annular floating body and sealing members connected to the outer edge and inner edge of the floating body, and the sealing members are slidably connected to the inner wall of the tank body and the outer wall of the column respectively.

[0011] Optionally, the floating separator includes a floating body, the floating body is a flexible filling body, the flexible filling body has a sealable filling port, and the flexible filling body can be filled with gas and / or liquid through the filling port.

[0012] Optionally, a pulling piece is connected to the separator, and the pulling piece extends from the top of the tank body.

[0013] Optionally, a through hole is provided on the top of the tank body, a plug is provided at the through hole, the plug is provided with a perforation, and the pulling member passes through the perforation upward.

[0014] To achieve the above-mentioned purpose, the present application also provides an air-conditioning system, including a refrigeration main unit, an air-conditioning terminal device and the cold storage device as described above, the refrigeration main unit is used to circulate cooling to the air-conditioning terminal device and to store cold in the cold storage device, the cold storage device is used to provide water cooling or phase change cooling to the air-conditioning terminal device, and the refrigeration main unit and the cold storage device can circulate cooling to the air-conditioning terminal device individually or jointly.

[0015] Optionally, the refrigeration host is connected to a host water supply pipeline and a host return pipeline, the air-conditioning terminal device is connected to an air-conditioning water supply pipeline and an air-conditioning return pipeline, the first interface of the cold storage device is connected to a cold storage tank water supply pipeline, the second interface of the cold storage device is connected to a cold storage tank return pipeline, and the third interface of the cold storage device is connected to a phase change section return pipeline; the host water supply pipeline and the host return pipeline are respectively connected to the air-conditioning water supply pipeline and the air-conditioning return pipeline to form a cooling circuit; the cold storage tank water supply pipeline and the cold storage tank return pipeline are respectively connected to the air-conditioning water supply pipeline and the air-conditioning return pipeline to form a cooling circuit; the air-conditioning system also includes a first cold storage pipeline and a second cold storage pipeline, and the inlet end of the first cold storage pipeline is connected to the host water supply pipeline pipeline and is located upstream of the air conditioning water supply pipeline, the outlet end of the first cold storage pipeline is connected to the first interface of the cold storage device, the outlet end of the second cold storage pipeline is connected to the host return pipeline and is located downstream of the air conditioning return pipeline, the inlet end of the second cold storage pipeline is connected to the second interface of the cold storage device, the middle pipe section of the first cold storage pipeline shares the middle pipe section of the cold storage tank return pipeline, and the middle pipe section of the second cold storage pipeline shares the middle pipe section of the cold storage tank supply pipeline; the first cold storage pipeline also includes a tank-side pipe section, the tank-side pipe section is connected between the middle pipe section of the first cold storage pipeline and the first interface of the cold storage device, the inlet end of the phase change section return pipeline is connected to the tank-side pipe section and is located upstream of the third interface;

[0016] The main unit water supply pipeline is provided with a first electric switch valve on the section between the first cold storage pipeline and the air conditioner water supply pipeline, the main unit return pipeline is provided with a second electric switch valve on the section between the second cold storage pipeline and the air conditioner return pipeline, the first cold storage pipeline is provided with a third electric switch valve on the section between the intermediate section and the main unit water supply pipeline, the second cold storage pipeline is provided with a fourth electric switch valve on the section between the intermediate section and the main unit return pipeline, the cold storage tank water supply pipeline is provided with a fifth electric switch valve on the section between the intermediate section and the air conditioner water supply pipeline, and the storage tank water supply pipeline is provided with a fifth electric switch valve on the section between the intermediate section and the air conditioner water supply pipeline. The section of the cold tank return pipeline between its intermediate pipe section and the air-conditioning return pipeline is provided with a sixth electric switching valve, the section of the cold storage tank return pipeline between its intermediate pipe section and the second interface is provided with a seventh electric switching valve, the section of the cold storage tank supply pipeline between its intermediate pipe section and the first interface is provided with an eighth electric switching valve, the section of the first cold storage pipeline between its intermediate pipe section and the first interface is provided with a ninth electric switching valve, the section of the second cold storage pipeline between its intermediate pipe section and the second interface is provided with a tenth electric switching valve, and the phase change section return pipeline is provided with an eleventh electric switching valve.

[0017] The present application provides a mid-level water distributor and a phase change material structure within the tank body of a cold storage device. The mid-level water distributor is located between the low-level water distributor and the high-level water distributor. A phase change cold storage section for arranging the phase change material structure is formed below the mid-level water distributor. The mid-level water distributor includes a third interface, and the cold storage device includes a phase change cooling mode. In this phase change cooling mode, the cold storage device outputs chilled supply water through the first interface of the low-level water distributor and inputs chilled return water through the third interface of the mid-level water distributor. Therefore, the cold storage device of the present application has both conventional water cold storage functions and phase change cold storage functions. In addition, because the phase change cold storage section only occupies a portion of the lower area of the tank body, the cold storage device of the present application can combine the advantages of phase change cold storage and water cold storage without incurring high costs. That is, it has the advantages of both the low cost of water cold storage devices and the energy-saving advantages of phase change cold storage devices, avoiding the problem that water cold storage devices save money but consume more energy. During normal use, the air conditioning system of the present application can achieve optimal energy-saving operation by maintaining the combined cooling of the refrigeration main unit and phase change. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the air conditioning system according to an embodiment of the present application.

[0019] Figure 2 yes Figure 1 A partial schematic diagram of the air conditioning system.

[0020] Figure 3 yes Figure 1 Status table of corresponding valves when the air conditioning system is in different operating conditions.

[0021] Figure 4 It is a schematic diagram of the cold storage device of an embodiment of the present application.

[0022] Figure 5 yes Figure 4 Enlarged schematic diagram of part a in the middle.

[0023] Figure 6 yes Figure 4 Enlarged schematic diagram of part b in the middle. DETAILED DESCRIPTION

[0024] In order to explain the content, structural features, achieved objectives and effects of this application in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0025] See also Figures 1 to 6The present application discloses a cold storage device 1 that combines water cold storage and phase change cold storage functions. The device comprises a tank body 10 and a low-level water distributor 11 and a high-level water distributor 12 disposed within the tank body 10. The low-level water distributor 11 has a first interface, and the high-level water distributor 12 has a second interface. During water cooling, the cold storage device 1 can output chilled supply water from the lower portion of the tank body 10 through the first interface of the low-level water distributor 11 and input chilled return water through the second interface of the high-level water distributor 12. The input chilled return water flows out to the upper portion of the tank body 10 through the high-level water distributor 12. When storing cold, the cold storage device 1 can input chilled water supply through the first interface of the low-level water distributor 11 and flow out to the lower part of the tank body 10 through the low-level water distributor 11, and can output chilled return water from the upper part of the tank body 10 through the second interface of the high-level water distributor 12. A middle-level water distributor 13 and a phase change material structure 14 are also provided in the tank body 10. The middle-level water distributor 13 is located between the low-level water distributor 11 and the high-level water distributor 12. A phase change cold storage section for arranging the phase change material structure 14 is formed below the middle-level water distributor 13 (specifically, the middle-level water distributor 13 is arranged close to the phase change cold storage section). The middle-level water distributor 13 is provided with a third interface. The cold storage device 1 can provide a phase change cooling condition. Under the phase change cooling condition, the cold storage device 1 outputs chilled water supply through the first interface of the low-level water distributor 11 and inputs chilled return water through the third interface of the middle-level water distributor 13. Specifically, the low-level water distributor 11, the high-level water distributor 12 and the middle-level water distributor 13 respectively include nozzles, wherein the nozzle of the low-level water distributor 11 sprays water upward, the nozzle of the high-level water distributor 12 sprays water downward, and the nozzle of the middle-level water distributor 13 sprays water downward; but it is not limited to this.

[0026] The present application provides a mid-level water distributor 13 and a phase change material structure 14 in the tank body 10 of the cold storage device 1. The mid-level water distributor 13 is located between the low-level water distributor 11 and the high-level water distributor 12. A phase change cold storage section for arranging the phase change material structure 14 is formed below the mid-level water distributor 13. The mid-level water distributor 13 includes a third interface. The cold storage device 1 includes a phase change cooling condition. Under the phase change cooling condition, the cold storage device 1 outputs chilled water supply through the first interface of the low-level water distributor 11 and inputs chilled return water through the third interface of the mid-level water distributor 13. Therefore, the cold storage device 1 of the present application has both conventional water cold storage function and phase change cold storage function, which can be selected according to needs. In addition, since the phase change cold storage section only occupies a partial area on the lower side of the tank body 10, the cold storage device 1 of the present application can have the advantages of phase change cold storage and water cold storage without incurring high costs, that is, it has the advantage of being cheap like water cold storage equipment and the advantage of energy saving like phase change cold storage equipment, avoiding the problem that water cold storage equipment saves money but consumes more energy.

[0027] Specifically, when storing cold, the cold storage device 1 first completes phase change cold storage and then completes water cold storage.

[0028] Specifically, the cold storage device 1 can input chilled water supply through the first interface of the low-level water distributor 11 and flow out to the lower part of the tank body 10 through the low-level water distributor 11, and output chilled return water from the upper part of the tank body 10 through the second interface of the high-level water distributor 12, thereby completing phase change cold storage and water cold storage. However, not limited to this, in different embodiments, when performing phase change cold storage, chilled water supply can be input through the first interface of the low-level water distributor 11 and flow out to the lower part of the tank body 10 through the low-level water distributor 11, and the chilled return water of the tank body 10 can be output through the third interface of the mid-level water distributor 13.

[0029] Specifically, when the cold storage device 1 provides cooling, it first performs water cooling and then performs phase change cooling.

[0030] In some embodiments, the phase change material structure 14 may include at least two phase change material layers, each phase change material layer includes a plurality of horizontally arranged phase change units, and the phase change units of adjacent phase change material layers are staggered.

[0031] Please combine Figures 4 to 6 In some embodiments, a separator is provided within the tank 10. The separator is located above the central water distributor 13 and is used to separate the water on its upper and lower sides. The provision of the separator is beneficial for suppressing the thermocline layer and also for utilizing the phase change cold storage stage.

[0032] Specifically, the separator 15 is a floating separator 15 that can float up and down with changes in water temperature. Specifically, the floating separator 15 can be equivalent to the density of water at X°C, where X lies between the normal temperature of the chilled supply water and the chilled return water. Of course, it is understood that the equivalent density of the floating separator 15 may fluctuate somewhat with environmental changes. Due to the configuration of the floating separator 15, when the chilled supply water below increases and the chilled return water above decreases, the floating separator 15 can float upward. When the chilled supply water below decreases and the chilled return water above increases, the floating separator 15 can float downward. This allows for sufficient water storage and cooling while separating the chilled supply water and the chilled return water.

[0033] In a specific example, the chilled water supply temperature of the cold storage device 1 is approximately 6°C, the chilled return water temperature received by the cold storage device 1 is approximately 14°C, and the floating separator 15 is approximately equivalent to the density of 10°C water.

[0034] Specifically, a column 16 is provided in the middle of the tank body 10; the floating separator 15 is annular and is sleeved on the column 16. The floating separator 15 can float up and down along the outer wall of the column 16 and the inner wall of the tank body 10, thereby enabling the floating separator 15 to float up and down reliably in the tank body 10.

[0035] Furthermore, the floating separator 15 includes an annular floating body 151 and seals 152 connected to the outer and inner edges of the floating body 151. The seals 152 are slidably connected to the inner wall of the tank body 10 and the outer wall of the column 16, respectively. The seals 152 cooperate with the inner wall of the tank body 10 and the outer wall of the column 16 to effectively isolate the floating separator 15 from the chilled return water on the upper side and the chilled supply water on the lower side.

[0036] In a specific example, a pipeline is formed in the column 16, which is connected to the second interface of the high-level water distributor 12 and the first interface of the low-level water distributor 11, respectively. A water-blocking blind plate 161 is provided between the pipelines to separate the chilled return water and the chilled supply water. The two pipelines are respectively connected to the second connecting pipe B and the first connecting pipe A. In addition, the cold storage device 1 also includes a third connecting pipe C connected to the middle-level water distributor 13. When cooling, the chilled supply water at the bottom of the tank body 10 is output to the pipeline in the column 16 and the first connecting pipe A through the first interface of the low-level water distributor 11 and output to the outside through the first connecting pipe A. The chilled return water returned from the external pipeline is input by the second connecting pipe B and input inward through the pipeline in the column 16 and the second interface of the high-level water distributor 12. During cold storage, chilled water from an external pipeline is input through the first connecting pipe A and fed inward through the pipeline in the column 16 and the first port of the low-level water distributor 11. Chilled return water from the upper portion of the tank 10 is output through the second port of the high-level water distributor 12 to the pipeline in the column 16 and the second connecting pipe B, and then discharged outward through the second connecting pipe B. During phase change cooling, the first port of the low-level water distributor 11 outputs chilled water to the pipeline in the column 16 and the first connecting pipe A, and then discharges the chilled water outward through the first connecting pipe A. Chilled return water from the external pipeline is input through the third connecting pipe C and fed inward through the third port of the mid-level water distributor 13.

[0037] Specifically, the floating separator 15 includes a floating body 151, which is a flexible filling body and is provided with a sealable filling port 150. Because the floating body 151 is flexible, it can be filled as needed, for example, with a mixture of alcohol and water, other liquids, or with both gas and liquid, thereby meeting the needs of different cold storage devices 1. Furthermore, as a flexible filling body, the floating body 151 also facilitates floating up and down within the tank 10.

[0038] Furthermore, a seal 152 is provided on the edge of the floating body 151. The seal 152 can be fixedly connected to the floating body 151 or integrally formed with the floating body 151. The provision of the seal 152 facilitates achieving a better isolation effect between the chilled return water and the chilled supply water.

[0039] In a specific example, the floating body 151 can be in a form similar to a tire inner tube, and the inner and outer edges of the floating body 151 are respectively connected to seal members 152 to seal with the outer side wall of the column 16 and the inner side wall of the tank body 10 .

[0040] Of course, the floating separator 15 is not limited to the above-mentioned form, as long as it can separate the chilled return water and the chilled supply water and float up and down with the change of water temperature.

[0041] Specifically, a pulling member 17 is connected to the floating partition 15, and the pulling member 17 extends from the top of the tank body 10. By providing the pulling member 17, it is convenient to put the floating partition 15 into the tank body 10 and take it out from the tank body 10.

[0042] Furthermore, the pulling member 17 may be a pull rope, but is not limited thereto. The number of the pulling members 17 is also not limited.

[0043] Furthermore, a through hole 18 is provided at the top of the tank body 10, through which a vent can be passed. The through hole 18 can be, but is not limited to, a vent. More specifically, a plug 19 is provided at the through hole 18, which can be provided with a perforation, through which the pull member 17 can pass upward.

[0044] The following description only uses the specific examples shown in the accompanying drawings to describe the operation of the cold storage equipment during cold storage and cooling, which should not be regarded as limiting the present application.

[0045] During cold storage, chilled water is input through the first interface of the low-level water distributor 11 and flows out through the low-level water distributor 11 to the lower part of the tank body 10. Chilled return water from the upper part of the tank body 10 is then output through the second interface of the high-level water distributor 12. As the chilled water is continuously input and output, the floating separator 15 continuously floats upward toward the high-level water distributor 12. As this process proceeds, phase change cold storage and water cold storage are completed successively.

[0046] When supplying cooling, water cooling is performed first, and then phase change cooling is performed. Specifically, the cold storage device 1 outputs the chilled water supply from the lower part of the tank body 10 through the first interface of the low-level water distributor 11 and inputs the chilled return water through the second interface of the high-level water distributor 12. The input chilled return water flows out to the upper part of the tank body 10 through the high-level water distributor 12. With the continuous output of chilled water supply and the continuous input of chilled return water, the floating partition 15 continuously floats downward and approaches the middle-level water distributor 13. After the floating partition 15 drops to a certain position, it can be switched to phase change cooling. The cold storage device 1 outputs chilled water supply through the first interface of the low-level water distributor 11 and inputs chilled return water through the third interface of the middle-level water distributor 13.

[0047] See also Figures 1 to 3The present application also discloses an air-conditioning system, including a refrigeration main unit 2, an air-conditioning terminal device 3 and a cold storage device 1 as described in the above embodiment. The refrigeration main unit 2 is used to circulate cooling to the air-conditioning terminal device 3 and to store cold in the cold storage device 1. The cold storage device 1 is used to provide water cooling (the conventional cooling method of the cold storage device 1) or phase change cooling to the air-conditioning terminal device 3. The refrigeration main unit 2 and the cold storage device 1 can circulate cooling to the air-conditioning terminal device 3 separately or jointly.

[0048] During normal use, the air-conditioning system of the present application can achieve optimal energy-saving operation by maintaining the cooling supply of the refrigeration main unit and the phase change cooling combined cooling.

[0049] Specifically, when the air conditioning system uses the cold storage device 1 for cooling, water cooling is performed first, and then phase change cooling is performed. When phase change cooling is performed, cooling can be combined with the refrigeration host to achieve optimal energy-saving operation. Of course, when water cooling is performed, cooling can also be combined with the refrigeration host.

[0050] Specifically, the refrigeration host 2 is connected to the host water supply pipeline 41 and the host return water pipeline 42, the air-conditioning terminal device 3 is connected to the air-conditioning water supply pipeline 43 and the air-conditioning return water pipeline 44, the first interface of the cold storage device 1 is connected to the cold storage tank water supply pipeline 45 (in a specific example, connected through the first connecting pipe A), the second interface of the cold storage device 1 is connected to the cold storage tank return water pipeline 46 (in a specific example, connected through the second connecting pipe B), and the third interface of the cold storage device 1 is connected to the phase change section return water pipeline 47 (in a specific example, connected through the third connecting pipe C); the host water supply pipeline 41 and the host return water pipeline 42 are respectively connected to the air-conditioning water supply pipeline 43 and the air-conditioning return water pipeline 44 to form a cooling circuit; the cold storage tank water supply pipeline 46 and the cold storage tank return water pipeline 45 are respectively connected to the air-conditioning water supply pipeline 43 and the air-conditioning return water pipeline 44 to form a cooling circuit; the air-conditioning system also includes a first The cold storage pipeline 48 and the second cold storage pipeline 49, the inlet end of the first cold storage pipeline 48 is connected to the main unit water supply pipeline 41 and is located upstream of the air conditioning water supply pipeline 43, the outlet end of the first cold storage pipeline 48 is connected to the first interface of the cold storage equipment, the outlet end of the second cold storage pipeline 49 is connected to the main unit return water pipeline 42 and is located downstream of the air conditioning return water pipeline 44, the inlet end of the second cold storage pipeline 49 is connected to the second interface of the cold storage equipment, the middle pipe section of the first cold storage pipeline 48 shares the middle pipe section of the cold storage tank return water pipeline 46, and the middle pipe section of the second cold storage pipeline 49 shares the middle pipe section of the cold storage tank supply water pipeline 45; the first cold storage pipeline 48 also includes a tank side pipe section 481, the tank side pipe section 481 is connected between the middle pipe section of the first cold storage pipeline 48 and the first interface of the cold storage equipment, the inlet end of the phase change section return water pipeline 47 is connected to the tank side pipe section 481 and is located on the upstream side of the third interface.

[0051] The section of the main unit water supply pipeline 41 between the first cold storage pipeline 48 and the air conditioning water supply pipeline 43 is provided with a first electric on-off valve V1. The section of the main unit return water pipeline 42 between the second cold storage pipeline 49 and the air conditioning return water pipeline 44 is provided with a second electric on-off valve V2. The section of the first cold storage pipeline 48 between its intermediate section and the main unit water supply pipeline 41 is provided with third electric on-off valves V3 and V7. The section of the second cold storage pipeline 49 between its intermediate section and the main unit return water pipeline 42 is provided with fourth electric on-off valves V4 and V6. The section of the cold storage tank water supply pipeline 45 between its intermediate section and the air conditioning water supply pipeline 43 is provided with a fifth electric on-off valve V8. The section of the cold storage tank return pipeline 46 between its intermediate section and the air conditioning return pipeline 44 is provided with a sixth electric switching valve V10, the section of the cold storage tank return pipeline 46 between its intermediate section and the second interface is provided with a seventh electric switching valve V12, the section of the cold storage tank supply pipeline 45 between its intermediate section and the first interface is provided with an eighth electric switching valve V15, the section of the first cold storage pipeline 48 between its intermediate section and the first interface is provided with a ninth electric switching valve V13, the section of the second cold storage pipeline 49 between its intermediate section and the second interface is provided with a tenth electric switching valve V14, and the phase change section return pipeline 47 is provided with an eleventh electric switching valve V16.

[0052] Furthermore, the section of the cold storage tank return water pipeline 46 between the middle section and the air conditioning return water pipeline 44 is also provided with an electric regulating valve V9.

[0053] The cold storage device further includes a bypass line 50, the ends of which are connected to the middle section of the cold storage tank water supply line 45 and the middle section of the cold storage tank return line 46, respectively. Bypass line 50 is provided with an electric regulating valve V11, which is used to adjust the water flow in bypass line 50 to adjust the water temperature. Specifically, electric regulating valve V11 is a proportional-integral valve, but is not limited to this.

[0054] Furthermore, the refrigeration host 2 is also connected to a cooling tower 6, which forms a loop with the refrigeration host 2 through a cooling tower water inlet pipe 61 and a cooling tower water outlet pipe 62. A twelfth electric switch valve V5 is provided on the cooling tower water inlet pipe 61.

[0055] Furthermore, the air-conditioning return water pipe 44 is also connected to an expansion water tank water supply pipe 51 to connect to an expansion water tank (not shown).

[0056] The air conditioning system in the above example can include at least the following operating conditions: cooling provided by the refrigeration unit alone, cold storage at night, cold storage tank alone (cold storage equipment provides cooling provided by conventional water cooling), joint cooling provided by the refrigeration unit and cold storage tank (cold storage equipment provides cooling provided by conventional water cooling provided by the refrigeration unit), and joint cooling provided by the refrigeration unit and tank phase change section (cold storage equipment provides cooling provided by phase change cooling provided by the refrigeration unit). Figure 3 The table shows the states of electric valves V1-V16 when the air conditioning system is in different operating conditions. When the first electric on-off valve V1, the second electric on-off valve V2, and the twelfth electric on-off valve V5 are open and the other electric valves are closed, the air conditioning system is in the refrigeration unit's sole cooling mode. When the third electric on-off valves V3 and V7, the fourth electric on-off valves V4 and V6, the twelfth electric on-off valve V5, the ninth electric on-off valve V13, and the tenth electric on-off valve V14 are open and the other electric valves are closed, the air conditioning system is in the nighttime cold storage mode, with refrigeration unit 2 storing cold in the cold storage tank. When the fifth electric on-off valve V8, the sixth electric on-off valve V10, the electric regulating valve V9, the electric regulating valve V11, the seventh electric on-off valve V12, and the eighth electric on-off valve V15 are open and the other electric valves are closed, the air conditioning system is in the cold storage tank's sole cooling mode. When the first electric on / off valve V1, the second electric on / off valve V2, the twelfth electric on / off valve V5, the fifth electric on / off valve V8, the sixth electric on / off valve V10, the electric regulating valve V9, the electric regulating valve V11, the seventh electric on / off valve V12, and the eighth electric on / off valve V15 are open and the other electric valves are closed, the air conditioning system is in a combined cooling mode between the refrigeration unit and the cold storage tank. When the first electric on / off valve V1, the second electric on / off valve V2, the twelfth electric on / off valve V5, the fifth electric on / off valve V8, the sixth electric on / off valve V10, the electric regulating valve V9, the electric regulating valve V11, the eighth electric on / off valve V15, and the eleventh electric on / off valve V16 are open and the other electric valves are closed, the air conditioning system is in a combined cooling mode between the refrigeration unit and the tank phase change section.

[0057] It should be noted that in the above specific examples, the form and number of the electric on / off valves are not limited, as long as the on / off control of the electric on / off valves can achieve switching between various cooling modes and cold storage tanks. Furthermore, the piping arrangement between the refrigeration unit 2, the air conditioning terminal unit 3, and the cold storage device is not limited to the arrangement described in the above specific examples; as long as the piping arrangement can achieve different cooling modes and cold storage tanks, it can be used.

[0058] The above disclosure is only a preferred example of the present application, and its purpose is to facilitate the understanding and implementation of those skilled in the art. It certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the scope of the patent application of the present application still fall within the scope covered by the present application.

Claims

1. A cold storage device with both water cold storage and phase change cold storage functions, comprising a tank body and a low-level water distributor and a high-level water distributor arranged in the tank body, the low-level water distributor having a first interface, the high-level water distributor having a second interface, when water is supplied for cooling, the cold storage device outputs chilled supply water through the first interface of the low-level water distributor and inputs chilled return water through the second interface of the high-level water distributor; when cold is stored, the cold storage device inputs chilled supply water through the first interface of the low-level water distributor and outputs chilled return water through the second interface of the high-level water distributor, characterized in that: A mid-level water distributor and a phase change material structure are also provided in the tank body. The mid-level water distributor is located between the low-level water distributor and the high-level water distributor. A phase change cold storage section for arranging the phase change material structure is formed below the mid-level water distributor. The mid-level water distributor is provided with a third interface. The cold storage equipment can perform phase change cooling. Under the phase change cooling condition, the cold storage equipment outputs chilled water supply through the first interface of the low-level water distributor and inputs chilled return water through the third interface of the mid-level water distributor.

2. The cold storage device according to claim 1, wherein: The mid-position water distributor is arranged close to the phase-change cold storage section.

3. The cold storage device according to claim 1, wherein: A separator is provided in the tank body, and the separator is located above the middle water distributor. The separator is used to separate water on the upper and lower sides thereof.

4. The cold storage device according to claim 3, wherein: The separator is a floating separator, and the floating separator floats up and down as the water temperature changes.

5. The cold storage device according to claim 4, characterized in that: A column is provided in the middle of the tank body; the floating separator is annular and sleeved on the column, and the floating separator can float up and down along the outer side wall of the column and the inner side wall of the tank body.

6. The cold storage device according to claim 5, characterized in that The floating separator includes an annular floating body and sealing members connected to the outer edge and the inner edge of the floating body. The sealing members are respectively connected to the inner side wall of the tank body and the outer side wall of the column in an upward and downward sliding manner.

7. The cold storage device according to claim 4, wherein: The floating separator comprises a floating body, which is a flexible filling body having a sealable filling port, and the flexible filling body is filled with gas and / or liquid through the filling port.

8. The cold storage device according to claim 3, wherein: The separator is connected with a pulling piece, and the pulling piece extends from the top of the tank body.

9. An air conditioning system, characterized in that: It includes a refrigeration host, an air-conditioning terminal device and a cold storage device as described in any one of claims 1 to 8, the refrigeration host is used to circulate cooling to the air-conditioning terminal device and store cold in the cold storage device, the cold storage device is used to provide water cooling or phase change cooling to the air-conditioning terminal device, and the refrigeration host and the cold storage device can circulate cooling to the air-conditioning terminal device separately or jointly.

10. The air conditioning system according to claim 9, wherein: The refrigeration host is connected to a host water supply pipeline and a host return pipeline, the air-conditioning terminal device is connected to an air-conditioning water supply pipeline and an air-conditioning return pipeline, the first interface of the cold storage device is connected to a cold storage tank water supply pipeline, the second interface of the cold storage device is connected to a cold storage tank return pipeline, and the third interface of the cold storage device is connected to a phase change section return pipeline; the host water supply pipeline and the host return pipeline are respectively connected to the air-conditioning water supply pipeline and the air-conditioning return pipeline to form a cooling circuit; the cold storage tank water supply pipeline and the cold storage tank return pipeline are respectively connected to the air-conditioning water supply pipeline and the air-conditioning return pipeline to form a cooling circuit; the air-conditioning system also includes a first cold storage pipeline and a second cold storage pipeline, and the inlet end of the first cold storage pipeline is connected to the host water supply pipeline and is located upstream of the air conditioning water supply pipeline, the outlet end of the first cold storage pipeline is connected to the first interface of the cold storage device, the outlet end of the second cold storage pipeline is connected to the main unit return pipeline and is located downstream of the air conditioning return pipeline, the inlet end of the second cold storage pipeline is connected to the second interface of the cold storage device, the middle pipe section of the first cold storage pipeline shares the middle pipe section of the cold storage tank return pipeline, and the middle pipe section of the second cold storage pipeline shares the middle pipe section of the cold storage tank supply pipeline; the first cold storage pipeline also includes a tank-side pipe section, the tank-side pipe section is connected between the middle pipe section of the first cold storage pipeline and the first interface of the cold storage device, the inlet end of the phase change section return pipeline is connected to the tank-side pipe section and is located upstream of the third interface; The main unit water supply pipeline is provided with a first electric switch valve on the section between the first cold storage pipeline and the air conditioner water supply pipeline, the main unit return pipeline is provided with a second electric switch valve on the section between the second cold storage pipeline and the air conditioner return pipeline, the first cold storage pipeline is provided with a third electric switch valve on the section between the intermediate section and the main unit water supply pipeline, the second cold storage pipeline is provided with a fourth electric switch valve on the section between the intermediate section and the main unit return pipeline, the cold storage tank water supply pipeline is provided with a fifth electric switch valve on the section between the intermediate section and the air conditioner water supply pipeline, and the storage tank water supply pipeline is provided with a fifth electric switch valve on the section between the intermediate section and the air conditioner water supply pipeline. The section of the cold tank return pipeline between its intermediate pipe section and the air-conditioning return pipeline is provided with a sixth electric switching valve, the section of the cold storage tank return pipeline between its intermediate pipe section and the second interface is provided with a seventh electric switching valve, the section of the cold storage tank supply pipeline between its intermediate pipe section and the first interface is provided with an eighth electric switching valve, the section of the first cold storage pipeline between its intermediate pipe section and the first interface is provided with a ninth electric switching valve, the section of the second cold storage pipeline between its intermediate pipe section and the second interface is provided with a tenth electric switching valve, and the phase change section return pipeline is provided with an eleventh electric switching valve.

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