Cold storage and supply system based on underground water and soil mixture and multi-mode cold storage and supply method

Abstract

The invention discloses a cold storage and supply system based on an underground water-soil mixture and a multi-mode cold storage and supply method, and belongs to the technical field of energy storage. The problems that an existing mechanical refrigeration mode is large in energy consumption and causes negative effects on the environment, and meanwhile natural cold sources are wasted are solved. According to the system, a cold storage pool is arranged underground in a severe cold or cold area, a water and soil mixture is adopted as a cold storage body, outdoor natural cold air is obtained through heat exchange with the external environment for cold storage, and a cold source is formed; the air system is used for conveying cold energy from the cold storage pool to the cold using space through an arranged circulating air path, and cold supply to the cold using space is achieved; the water system is used for conveying cold energy from the cold storage pool to the cold using space through an arranged circulating pipeline, and cold supply to the cold using space is achieved; and the controller controls the air system or the water system to cool the cold space according to the cold demand of the cold space, or controls the air system and the water system to cool the cold space at the same time. According to the invention, the natural cold source is fully utilized.

Description

Technical Field

[0001] The invention relates to a cold storage and cooling supply system based on underground water-soil mixture and a multi-mode cold storage and cooling supply method, belonging to the technical field of energy storage. Background Art

[0002] With the intensification of global climate change and the continuous advancement of urbanization, energy consumption and environmental protection issues have received increasing attention. Especially in the hot summer, the frequency of use of equipment such as air conditioners and cold storage has increased sharply, bringing huge energy demand and environmental burden. Traditional cooling methods, such as mechanical refrigeration, can meet the demand in the short term, but there is a problem of high energy consumption in system operation. How to reduce energy consumption and reduce negative impact on the environment while ensuring the supply of cooling capacity has become an important direction for the development of refrigeration technology today.

[0003] In extremely cold or frigid areas, the winters are cold and long, the ice and snow resources are abundant, and the ice period lasts for a long time. However, this part of the cold source is not fully utilized in the cooling environment, resulting in a waste of natural energy. Summary of the invention

[0004] In view of the negative impact of existing mechanical refrigeration methods on the environment due to high energy consumption and waste of natural cold sources, the present invention provides a cold storage and cooling system based on underground water-soil mixture and a multi-mode cold storage and cooling method.

[0005] The present invention discloses a cold storage and cooling system based on underground water-soil mixture, comprising a cold storage tank, a wind system, a water system and a cold space.

[0006] The cold storage pool is set underground in severe or cold areas, uses a water-soil mixture as a cold storage body, obtains outdoor natural cold air through heat exchange with the external environment to store cold, and forms a cold source;

[0007] The air system transmits cold energy from the cold storage tank to the cold space through the set circulating air path, thus realizing the cooling of the cold space;

[0008] The water system transmits cold energy from the cold storage tank to the cold space through the set circulation pipeline, thus realizing the cooling of the cold space;

[0009] The controller controls the air system or the water system to cool the cooling space according to the cooling demand of the cooling space, or controls the air system and the water system to cool the cooling space at the same time.

[0010] According to the cold storage and cooling system based on underground water-soil mixture of the present invention, the body of the cold storage tank is a concrete structure, and an outer insulation layer is laid on the outer wall of the tank body.

[0011] According to the cold storage and cooling system based on underground water-soil mixture of the present invention, the cold storage tank also includes an electric cover, an electric reel, a thermal insulation coating, and a filter baffle.

[0012] The electric cover is connected to the pool body through an electric reel to achieve opening and closing relative to the pool body; a thermal insulation coating is arranged on the upper surface of the electric cover; and a filter baffle is arranged at a position of the inner cavity of the pool body close to the electric cover.

[0013] According to the cold storage and cooling system based on underground water-soil mixture of the present invention, the air system includes an air inlet pipeline, an air inlet cavity, a heat exchange air duct, an air outlet cavity and an air supply pipeline.

[0014] An air inlet cavity is arranged on one side of the inner cavity of the cold storage tank body, and an air outlet cavity is arranged on the other side. The air inlet pipeline connects the cold space and the air inlet cavity. The air inlet cavity is connected to the air outlet cavity through the heat exchange air duct laid at the bottom of the cold storage tank body. The air outlet cavity is connected to the cold space through the air supply pipeline.

[0015] The heat exchange air duct is used to obtain cold energy in the cold storage body.

[0016] According to the cold storage and cooling system based on underground water-soil mixture of the present invention, the air outlet of the air inlet pipeline connected to the air inlet cavity is lower than the air inlet of the air supply pipeline connected to the air outlet cavity;

[0017] The return air outlet of the air inlet duct connected to the cooling space is arranged at the bottom of the cooling space, and the air supply duct connected to the cooling space is arranged at the top of the cooling space.

[0018] According to the cold storage and cooling system based on underground water-soil mixture of the present invention, fans are respectively arranged on the air inlet pipeline and the air supply pipeline; electric air valves are respectively arranged on both sides of the air inlet pipeline and the air supply pipeline corresponding to the fans.

[0019] According to the cold storage and cooling system based on underground water-soil mixture of the present invention, the water system includes a floor radiant cooling coil, a water inlet pipe, a hot water exchange pipe and a water outlet pipe.

[0020] The floor radiant cooling coil is arranged at the bottom of the cold space; the hot water exchange pipe is arranged in a serpentine shape in the inner cavity of the cold storage tank to obtain the cold energy in the cold storage tank; the water inlet pipe is connected to the return water port of the radiant cooling coil and the water inlet of the hot water exchange pipe, and the water outlet pipe is connected to the water outlet of the hot water exchange pipe and the water inlet of the radiant cooling coil.

[0021] According to the cold storage and cooling system based on underground water-soil mixture of the present invention, a water pump and an electric valve are arranged on the water outlet pipe; an electric valve is arranged on the water inlet pipe;

[0022] The water inlet pipe is connected to the water tank, and an electric valve and a check valve are arranged on the connecting pipeline between the water tank and the water inlet pipe.

[0023] The present invention also provides a multi-mode cold storage and cooling method, which is implemented by using the cold storage and cooling system based on underground water-soil mixture, wherein the cold storage method is:

[0024] When the ambient air temperature reaches below 0°C, the electric roller is controlled to open the electric cover, so that the water-soil mixture in the cold storage tank contacts the ambient air and absorbs the cold energy in the outdoor ambient air; when the water-soil mixture is completely frozen, the electric roller is controlled to close the electric cover, and the cold storage tank is closed to store cold and form a cold source;

[0025] The cooling method includes using a controller to control the air system to cool the cooling space, controlling the water system to cool the cooling space, or controlling the air system and the water system to cool the cooling space at the same time.

[0026] According to the multi-mode cold storage and cooling method of the present invention,

[0027] The method of cooling the cold space by the air system is as follows: the fan and the electric air valve arranged on the air inlet duct and the air supply duct are turned on, and the hot air in the cold space enters the air inlet cavity through the air inlet duct, and then enters the heat exchange air duct to exchange heat with the cold storage body in the cold storage tank, and the cooled air is collected in the air outlet cavity and sent to the cold space through the air supply duct;

[0028] The method of cooling the cold space by the water system is as follows: the water pump and the electric valve arranged on the water inlet pipe and the water outlet pipe are turned on, so that the water in the water tank enters the hot water exchange pipe through the water inlet pipe, the water in the hot water exchange pipe exchanges heat with the cold storage body in the cold storage tank, the cooled water is transferred to the floor radiant cooling coil through the water outlet pipe to radiate cooling to the cold space, and then flows back to the water inlet pipe to form a cooling cycle;

[0029] The method of using both the wind system and the water system to cool the cold space is as follows: according to the cooling demand of the cold space, first turn on the wind system for main cooling, and then turn on the water system as auxiliary cooling to achieve combined cooling of the wind-water system.

[0030] Beneficial effects of the invention: The invention is applicable to the use of cold energy in various places with large demand for cold energy. It makes full use of the climate characteristics of severe cold areas, stores a large amount of natural cold energy in the winter air, and uses it as a reliable cold source for low-temperature cooling in cold places, thereby achieving energy saving.

[0031] The system of the present invention combines the natural cold storage capacity of groundwater and soil, as well as the abundant natural cold energy in winter, and utilizes the heat exchange characteristics of soil and the constant temperature characteristics of groundwater. It can not only efficiently store the natural cold energy in winter, but also flexibly dispatch cooling according to demand. According to the changes in ambient temperature and cooling load demand, different operating modes can be selected for the system to achieve intelligent management and optimized use of energy, and realize on-demand cooling for cold places.

[0032] The present invention efficiently utilizes underground water-soil mixture to realize multi-mode cold storage and cooling, effectively solving the deficiencies of traditional refrigeration systems in terms of energy consumption, environmental impact and operating costs.

[0033] The present invention makes full use of the natural characteristics of groundwater and soil, reduces dependence on traditional refrigeration equipment, and thus reduces energy consumption. The present invention is suitable for a variety of application scenarios with large cooling load requirements, and is efficient, environmentally friendly, and economical. The present invention balances the fluctuation of cooling load through cold storage technology, avoids overload operation of refrigeration equipment during peak hours, and can effectively reduce operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the cold storage and cooling system based on underground water-soil mixture according to the present invention;

[0035] Figure 2 It is a schematic diagram of the cold storage structure of the cold storage tank;

[0036] Figure 3 It is a top view of the heat exchange duct;

[0037] Figure 4 It is a three-dimensional structural diagram of a hot water exchange pipe;

[0038] Figure 5 It is a schematic diagram of the independent cooling mode of the wind system;

[0039] Figure 6 It is a schematic diagram of the independent cooling mode of the water system. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0042] The present invention will be further described below in conjunction with the accompanying drawings, but is not intended to be a limitation of the present invention.

[0043] Specific implementation method 1. Combination Figures 1 to 6 As shown, the first aspect of the present invention provides a cold storage and cooling system based on underground water-soil mixture, comprising a cold storage tank 100, a wind system 200, a water system 300 and a cold space 400.

[0044] The cold storage tank 100 is arranged underground in a severely cold or cold region, and uses a water-soil mixture as a cold storage body, obtains outdoor natural cold air through heat exchange with the external environment to store cold, forming a cold source;

[0045] The wind system 200 realizes the cold energy transmission from the cold storage tank 100 to the cold space 400 through the provided circulating wind path, thereby realizing the cold supply to the cold space 400;

[0046] The water system 300 realizes the cold energy transmission from the cold storage tank 100 to the cold space 400 through the provided circulation pipeline, thereby realizing the cold supply to the cold space 400;

[0047] The controller controls the air system 200 or the water system 300 to cool the cooling space 400 according to the cooling demand of the cooling space 400 and the terminal device, or controls the air system 200 and the water system 300 to cool the cooling space 400 at the same time.

[0048] Furthermore, the body of the cold storage tank 100 is a concrete structure, and an outer insulation layer 150 is applied on the outer wall of the body to reduce the loss of cold in the cold storage tank.

[0049] In this embodiment, the cold storage tank 100 further includes an electric cover 110, an electric reel 120, a thermal insulation coating 130, and a filter partition 140.

[0050] The electric cover 110 is connected to the pool body through an electric reel 120 to achieve opening and closing relative to the pool body; a thermal insulation coating 130 is provided on the upper surface of the electric cover 110 to reduce the loss of cold energy of the pool body; a filter baffle 140 is provided in the inner cavity of the pool body near the electric cover 110.

[0051] The cold storage pool 100 is filled with a mixture of water and soil as a cold storage body, and a wind system and a water system are provided to realize cooling in various modes.

[0052] The electric cover 110 has an openable function, and the thermal insulation coating 130 covers the top of the cold storage tank. When the electric cover 110 is closed, it plays a role in reducing the loss of cold. When the electric reel 120 starts working, the electric cover of the cold storage tank can be fully opened to increase the contact area between the cold storage body and the outdoor cold air, speed up the cold storage speed, and realize the cold storage of the cold storage tank. The filter baffle 140 can be welded and fixed on the inner wall of the tank body. When the electric cover is opened, it prevents outdoor debris from falling into the cold storage tank, playing a certain filtering role.

[0053] The air system 200 includes an air inlet pipeline 210, an air inlet cavity 220, a heat exchange air duct 230, an air outlet cavity 240 and an air supply pipeline 250.

[0054] An air inlet cavity 220 is provided on one side of the inner cavity of the cold storage tank 100, and an air outlet cavity 240 is provided on the other side. An air inlet pipeline 210 connects the cold space 400 and the air inlet cavity 220. The air inlet cavity 220 is connected to the air outlet cavity 240 through a heat exchange air duct 230 laid at the bottom of the cold storage tank 100. The air outlet cavity 240 is connected to the cold space 400 through an air supply pipeline 250.

[0055] The heat exchange air duct 230 is used to obtain cold energy in the cold storage body.

[0056] The wind system can realize the orderly supply of cold energy stored in the cold storage tank to the cooling places.

[0057] Furthermore, the air outlet of the air inlet pipe 210 connected to the air inlet cavity 220 is lower than the air inlet of the air supply pipe 250 connected to the air outlet cavity 240;

[0058] The air inlet duct 210 connected to the return air port of the cooling space 400 is arranged at the bottom of the cooling space 400 , and the air supply duct 250 connected to the air supply port of the cooling space 400 is arranged at the top of the cooling space 400 .

[0059] In this embodiment, fans are respectively arranged on the air inlet pipeline 210 and the air supply pipeline 250 ; electric air valves are respectively arranged on both sides of the air inlet pipeline 210 and the air supply pipeline 250 corresponding to the fans.

[0060] Furthermore, the water system 300 includes a floor radiant cooling coil 310, a water inlet pipe 320, a hot water exchange pipe 330 and a water outlet pipe 340.

[0061] The floor radiant cooling coil 310 is arranged at the bottom of the cold space 400; the hot water exchange pipe 330 is serpentinely arranged in the inner cavity of the cold storage tank 100 to obtain the cold energy in the cold storage tank; the water inlet pipe 320 connects the return water port of the radiant cooling coil 310 and the water inlet of the hot water exchange pipe 330, and the water outlet pipe 340 connects the water outlet of the hot water exchange pipe 330 and the water inlet of the radiant cooling coil 310.

[0062] The floor radiant cooling coil 310 is a cooling terminal device, which provides cooling to the cooling place by using the cooling energy in the hot water pipe through the radiation cooling method.

[0063] In this embodiment, a water pump 341 and an electric valve are provided on the water outlet pipe 340 to provide power for the circulation of water in the hot water exchange pipe; an electric valve is provided on the water inlet pipe 320;

[0064] The water inlet pipe 320 is connected to the water tank, and an electric valve and a check valve are arranged on the connecting pipeline between the water tank and the water inlet pipe 320. The check valve is used to prevent the return water of the floor radiation cooling coil from flowing back into the water tank, and the electric valve plays a shut-off role.

[0065] In this embodiment, the air supply outlet of the air supply duct is located at the top of the cooling place, and the return air outlet in the cooling place is arranged at the bottom of the cooling place. The supply and return air form a circulation to make the air flow fully in the room, and the air outlet is in the form of side air supply.

[0066] The cooling places in this embodiment include but are not limited to grain depots, cold storages, data centers and other buildings with large cooling demands.

[0067] Specific implementation method 2: Combination Figures 1 to 6 As shown, another aspect of the present invention further provides a multi-mode cold storage and cooling method, which is implemented by the cold storage and cooling system based on underground water-soil mixture described in the specific implementation mode 1, wherein the cold storage method is:

[0068] When the ambient air temperature reaches below 0°C, the electric roller 120 is controlled to open the electric cover 110, so that the water-soil mixture in the cold storage tank 100 is in direct contact with the ambient air, increasing the contact area and absorbing the cold energy in the outdoor ambient air; when the water-soil mixture is completely frozen, the electric roller 120 is controlled to close the electric cover 110, and the cold storage tank 100 is sealed to store cold and form a cold source; thereby realizing the use of underground water-soil mixture for cold storage;

[0069] The cooling method includes using a controller to control the air system 200 to cool the cooling space 400, control the water system 300 to cool the cooling space 400, or control the air system 200 and the water system 300 to cool the cooling space 400 at the same time.

[0070] Furthermore, the method for the air system 200 to provide cooling to the cold space 400 is as follows: when the cold space 400 needs cooling, the fan and the electric air valve arranged on the air inlet duct 210 and the air supply duct 250 are interlocked and turned on, and the hot air of the cold space 400 enters the air inlet cavity 220 through the air inlet duct 210, and then enters the heat exchange air duct 230 to exchange heat with the cold storage body in the cold storage tank 100, and the cooled air is collected in the air outlet cavity 240, and is sent to the cold space 400 through the air supply duct 250; the air supply temperature can reach 12°C, providing cooling for the cold place, and when the cold place does not need cooling, the air system is turned off and stopped working, so as to realize cooling on demand;

[0071] The method for the water system 300 to cool the cold space 400 is as follows: when the room needs cooling capacity, the water pump 341 and the electric valve arranged on the water inlet pipe 320 and the water outlet pipe 340 are turned on, so that the water in the water tank enters the hot water exchange pipe 330 through the water inlet pipe 320, and the water in the hot water exchange pipe 330 exchanges heat with the cold storage body in the cold storage tank 100, and the water supply temperature of the floor radiation cooling coil can reach 5°C, and the cooled water is transferred to the floor radiation cooling coil 310 through the water outlet pipe 340 to radiate cooling for the cold space 400, and then flows back to the water inlet pipe 320 to form a cooling cycle;

[0072] After the cold energy sent to the water exchange water pipe is transferred, it flows out along the return pipe section of the floor radiant cooling coil, passes through the corresponding electric valve, and gathers the water to the inlet of the water system for water circulation heat exchange. When the cooling place does not need the cold energy, the water system is closed and the work is stopped to realize the orderly supply of cold energy.

[0073] The method for the wind system 200 and the water system 300 to simultaneously cool the cold space 400 is: according to the cooling demand of the cold space 400, when the cooling demand of the cold space is large, first turn on the wind system 200 for main cooling, and then turn on the water system 300 for auxiliary cooling, so as to realize the combined cooling of the wind and water systems.

[0074] Embodiment 1: Combination Figures 1 to 6 As shown, the body of the cold storage tank is a concrete structure. A thickened insulation layer is laid around and on the bottom of the cold storage tank body to reduce the loss of cold in the cold storage tank. The thickened insulation layer uses a polyurethane insulation board with a thermal conductivity of 0.024W / (m·K). The insulation coating is tightly attached to the top of the cold storage tank cover and moves with the electric cover, mainly to ensure that the cold loss is reduced when the cold storage tank is closed.

[0075] The wind system can realize the orderly supply of cold energy stored in the cold storage tank to the cooling places.

[0076] When the water system is closed, the hot water exchange pipe is not filled with water to prevent the hot water exchange pipe from freezing and cracking.

[0077] Embodiment 2: When the cooling terminal device in the cooling place has both a water system and a wind system, and the cooling demand is large, the wind system and the water system are turned on at the same time, and the system enters the wind-water system joint cooling mode. After the wind system is turned on first, the water system is used as a supplementary cooling to achieve joint cooling.

[0078] The terminal devices in the cooling place include but are not limited to floor radiant cooling coils, which can be air-water heat exchangers such as fan coils, or other radiant cooling terminal devices such as wall (ceiling, wall panels, etc.) radiant cooling coils.

[0079] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that the features described in conjunction with a single embodiment may be used in other described embodiments.

Claims

1. A cold storage and cooling system based on underground water-soil mixture, characterized in that: It includes a cold storage tank (100), a wind system (200), a water system (300) and a cold space (400). The cold storage pool (100) is arranged underground in a severely cold or cold region, uses a water-soil mixture as a cold storage body, obtains outdoor natural cold air through heat exchange with the external environment to store cold, and forms a cold source; The wind system (200) realizes the transmission of cold energy from the cold storage tank (100) to the cold space (400) through the provided circulating wind path, thereby realizing the cold supply to the cold space (400); The water system (300) realizes the transmission of cold energy from the cold storage tank (100) to the cold space (400) through the provided circulation pipeline, thereby realizing the cold supply to the cold space (400); The controller controls the air system (200) or the water system (300) to provide cooling to the cooling space (400) according to the cooling demand of the cooling space (400), or controls the air system (200) and the water system (300) to provide cooling to the cooling space (400) at the same time.

2. The cold storage and cooling system based on underground water-soil mixture according to claim 1 is characterized in that: The body of the cold storage tank (100) is a concrete structure, and an outer thermal insulation layer (150) is applied on the outer wall of the body.

3. The cold storage and cooling system based on underground water-soil mixture according to claim 2 is characterized in that: The cold storage tank (100) further comprises an electric cover plate (110), an electric reel (120), a thermal insulation coating (130), and a filter partition (140). The electric cover plate (110) is connected to the pool body via an electric reel (120) to achieve opening and closing relative to the pool body; a thermal insulation coating (130) is provided on the upper surface of the electric cover plate (110); and a filter partition (140) is provided at a position of the inner cavity of the pool body close to the electric cover plate (110).

4. The cold storage and cooling system based on underground water-soil mixture according to claim 3 is characterized in that: The air system (200) comprises an air inlet pipeline (210), an air inlet cavity (220), a heat exchange air duct (230), an air outlet cavity (240) and an air supply pipeline (250). An air inlet cavity (220) is arranged on one side of the inner cavity of the cold storage tank (100), and an air outlet cavity (240) is arranged on the other side; an air inlet pipeline (210) connects the cold space (400) and the air inlet cavity (220); the air inlet cavity (220) is connected to the air outlet cavity (240) via a heat exchange air duct (230) laid at the bottom of the cold storage tank (100); and the air outlet cavity (240) is connected to the cold space (400) via an air supply pipeline (250); The heat exchange air duct (230) is used to obtain cold energy in the cold storage body.

5. The cold storage and cooling system based on underground water-soil mixture according to claim 4 is characterized in that: The air outlet of the air inlet pipeline (210) connected to the air inlet cavity (220) is lower than the air inlet of the air supply pipeline (250) connected to the air outlet cavity (240); The air return port of the air inlet duct (210) connected to the cooling space (400) is arranged at the bottom of the cooling space (400), and the air supply port of the air supply duct (250) connected to the cooling space (400) is arranged at the top of the cooling space (400).

6. The cold storage and cooling system based on underground water-soil mixture according to claim 5 is characterized in that: The air inlet pipeline (210) and the air supply pipeline (250) are respectively provided with fans; and electric air valves are respectively provided on both sides of the air inlet pipeline (210) and the air supply pipeline (250) corresponding to the fans.

7. The cold storage and cooling system based on underground water-soil mixture according to claim 6 is characterized in that: The water system (300) includes a floor radiant cooling coil (310), a water inlet pipe (320), a hot water exchange pipe (330) and a water outlet pipe (340). The floor radiant cooling coil (310) is arranged at the bottom of the cold space (400); the heat exchange pipe (330) is arranged in a serpentine shape in the inner cavity of the cold storage tank (100) to obtain cold energy from the cold storage tank; the water inlet pipe (320) is connected to the water return port of the radiant cooling coil (310) and the water inlet of the heat exchange pipe (330); the water outlet pipe (340) is connected to the water outlet of the heat exchange pipe (330) and the water inlet of the radiant cooling coil (310).

8. The cold storage and cooling system based on underground water-soil mixture according to claim 7 is characterized in that: The water outlet pipe (340) is provided with a water pump (341) and an electric valve; the water inlet pipe (320) is provided with an electric valve; The water inlet pipe (320) is connected to a water tank, and an electric valve and a check valve are arranged on the connecting pipeline between the water tank and the water inlet pipe (320).

9. A multi-mode cold storage and cooling method, implemented by using the cold storage and cooling system based on underground water-soil mixture according to claim 8, characterized in that: The cold storage method is: When the ambient air temperature reaches below 0° C., the electric roller (120) is controlled to open the electric cover (110), so that the water-soil mixture in the cold storage tank (100) contacts the ambient air and absorbs cold energy in the outdoor ambient air; when the water-soil mixture is completely frozen, the electric roller (120) is controlled to close the electric cover (110), so that the cold storage tank (100) is sealed to store cold and form a cold source; The cooling method comprises using a controller to control an air system (200) to cool a cooling space (400), controlling a water system (300) to cool the cooling space (400), or controlling the air system (200) and the water system (300) to cool the cooling space (400) at the same time.

10. The multi-mode cold storage and cooling method according to claim 9, characterized in that: The method for the air system (200) to provide cooling to the cold space (400) is as follows: the fan and the electric air valve arranged on the air inlet pipeline (210) and the air supply pipeline (250) are turned on, and the hot air of the cold space (400) enters the air inlet cavity (220) through the air inlet pipeline (210), and then enters the heat exchange air duct (230) to exchange heat with the cold storage body in the cold storage tank (100), and the cooled air is collected in the air outlet cavity (240) and sent to the cold space (400) through the air supply pipeline (250); The method for the water system (300) to provide cooling to the cold space (400) is as follows: the water pump (341) and the electric valve arranged on the water inlet pipe (320) and the water outlet pipe (340) are turned on to allow the water in the water tank to enter the hot water exchange pipe (330) through the water inlet pipe (320); the water in the hot water exchange pipe (330) exchanges heat with the cold storage body in the cold storage tank (100); the cooled water is transferred to the floor radiation cooling coil (310) through the water outlet pipe (340) to provide radiation cooling to the cold space (400); and then flows back to the water inlet pipe (320) to form a cooling cycle; The method for simultaneously providing cooling to a cooling space (400) by an air system (200) and a water system (300) is as follows: according to the cooling demand of the cooling space (400), the air system (200) is first turned on for main cooling, and then the water system (300) is turned on for auxiliary cooling, thereby realizing combined cooling by the air-water system.

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