A cold storage system

Abstract

The application discloses a cold storage system, which comprises a cold storage pool, an end device, a first pipeline, a second pipeline, a first air inlet and exhaust device and a second air inlet and exhaust device; the cold storage pool is lower than the end device; two ends of the first pipeline are connected to a water outlet of the cold storage pool and a water inlet of the end device respectively, the first pipeline is provided with a first protruding part, the first protruding part is higher than the end device, the first air inlet and exhaust device is arranged on the first pipeline and located between the water outlet of the cold storage pool and the first protruding part; two ends of the second pipeline are connected to a water inlet of the cold storage pool and a water outlet of the end device respectively, the second pipeline is provided with a second protruding part, the second protruding part is higher than the end device, the second air inlet and exhaust device is arranged on the second pipeline and located between the water inlet of the cold storage pool and the second protruding part, and an overflow port and a water outlet of the second air inlet and exhaust device are connected to the cold storage pool; in summary, the cold storage device has high heat exchange efficiency and low energy consumption.

Description

Technical Field

[0001] This invention relates to the field of cold storage technology, and in particular to a cold storage system. Background Technology

[0002] Currently, water-based and ice-based cold storage systems generally employ an indirect heat exchange design between the cold storage tank (or ice storage trough) and the air conditioning terminal equipment. Since cold storage facilities are typically located in building basements or underground chiller stations, their elevation is generally lower than the building floor where the air conditioning terminals are located and the municipal buried pipe network. To prevent backflow caused by gravity in open water systems, traditional solutions require physical isolation between the cold storage side and the user-side water system using plate heat exchangers. Although the aforementioned indirect heat exchange structure can solve the backflow problem, the lower heat exchange efficiency of indirect heat exchange, coupled with the requirement that the temperature difference between the refrigerant on both sides of the plate heat exchanger must reach at least 1°C to meet the heat exchange demand, necessitates a further reduction in the outlet water temperature of the primary chiller. This leads to a decrease in the COP (coefficient of performance) of the chiller, resulting in higher energy consumption for the cold storage system. Summary of the Invention

[0003] The purpose of this invention is to provide a cold storage system to solve the technical problem of high energy consumption in traditional cold storage systems.

[0004] To achieve the above objectives, the present invention provides a cold storage system, including a cold storage tank, terminal equipment, a first pipeline, a second pipeline, a first air intake and exhaust device, and a second air intake and exhaust device; The cold storage tank is lower than the terminal equipment; The first pipe is connected to the outlet of the cold storage tank and the inlet of the terminal device at both ends, respectively. The first pipe is provided with a first protrusion, which is higher than the terminal device. The first air intake and exhaust device is provided on the first pipe and is located between the outlet of the cold storage tank and the first protrusion. The two ends of the second pipe are respectively connected to the inlet of the cold storage tank and the outlet of the terminal device. The second pipe is provided with a second protrusion, which is higher than the terminal device. The second air intake and exhaust device is provided on the second pipe and is located between the inlet of the cold storage tank and the second protrusion. The overflow port and outlet of the second air intake and exhaust device are connected to the cold storage tank.

[0005] Optionally, the first intake and / or the second intake and exhaust device is a rapid automatic intake and exhaust valve.

[0006] Optionally, it also includes main intake and exhaust pipes and secondary intake and exhaust pipes; The second air intake and exhaust device includes a container bottle with a receiving cavity inside. The outer surface of the container bottle has a main air intake and exhaust port and a secondary air intake and exhaust port communicating with the receiving cavity. The main air intake and exhaust port is located below the secondary air intake and exhaust port. One end of the main air intake and exhaust port is connected to the main air intake and exhaust port, and the other end is used to communicate with external air. One end of the main air intake and exhaust port is connected to the secondary air intake and exhaust port, and the other end is used to communicate with external air. The water inlet and water outlet of the second air intake and exhaust device are located on the outer surface of the container bottle and communicate with the receiving cavity. The water inlet and water outlet of the second air intake and exhaust device are lower than the secondary air intake and exhaust port. The water inlet of the second air intake and exhaust device is connected to the terminal device. The water outlet of the second air intake and exhaust device is connected to the water inlet of the cold storage tank. The overflow port of the second air intake and exhaust device is located on the outer surface of the container bottle and communicates with the receiving cavity. The overflow port of the second air intake and exhaust device is higher than the water inlet and water outlet of the second air intake and exhaust device. The second air intake and exhaust device further includes a float and a mesh screen. The receiving cavity includes a first chamber, a second chamber, and a third chamber arranged sequentially from bottom to top and connected to each other. The water inlet and outlet of the second air intake and exhaust device, as well as the main air intake and exhaust port, are connected to the first chamber. The secondary air intake and exhaust port and the overflow port are connected to the third chamber. The mesh screen is fixedly installed in the receiving cavity and is located between the first chamber and the second chamber. The float is located in the second chamber. When the water level in the containment cavity rises, the float can move upward to a sealed position to close the connection between the second chamber and the third chamber.

[0007] Optionally, the diameter of the main intake and exhaust pipe is equal to the diameter of the second pipe, the diameter of the secondary intake and exhaust pipe is smaller than the diameter of the main intake and exhaust pipe, and the diameter of the float is larger than the diameter of the secondary intake and exhaust pipe and smaller than the diameter of the main intake and exhaust pipe.

[0008] Optionally, a first water pump and a check valve may also be included; The first water pump and the check valve are located on the first pipeline. The first water pump and the check valve are arranged sequentially from the cold storage tank to the terminal equipment, and the first water pump and the check valve are oriented towards the terminal equipment.

[0009] Optionally, it may also include a first refrigeration unit, a first switching valve, a second switching valve, a second water pump, a third pipe, and a fourth pipe; The two ends of the third pipe are respectively connected to the outlet of the first refrigeration unit and the first pipe. The connection between the third pipe and the first pipe is designated as the first connection point. The first connection point is located between the outlet of the first water pump and the cold storage tank. The second switch valve is located between the first connection point and the first water pump. The two ends of the fourth pipe are respectively connected to the inlet of the first refrigeration unit and the cold storage tank. The second water pump is located on the fourth pipe.

[0010] Optionally, a first controller may also be included; The first controller is connected to the first refrigeration unit, the first water pump, the second water pump, the first switching valve, and the second switching valve; The first controller is configured to switch between a first host cold storage mode, a first independent cooling mode, and a first hybrid cooling mode; When the first controller switches to the first host cold storage mode, the first refrigeration host operates normally, the first water pump stops operating, the second water pump operates normally, the first switch valve is in the closed state, and the second switch valve is in the open state. When the first controller switches to the first independent cooling mode, the first refrigeration unit stops operating, the first water pump operates normally, the second water pump stops operating, the first switch valve is in the open state, and the second switch valve is in the closed state. When the first controller switches to the combined cooling mode, the first refrigeration unit operates normally, the first water pump operates normally, the second water pump operates normally, the first switch valve is in the open state, and the second switch valve is in the open state.

[0011] Optional components also include a second refrigeration unit, an ice storage coil, a heat exchanger, a third water pump, a third switching valve, a fourth switching valve, a fifth switching valve, a sixth switching valve, a seventh switching valve, an eighth switching valve, a ninth switching valve, a fifth pipeline, a sixth pipeline, a seventh pipeline, an eighth pipeline, and a ninth pipeline. The ice storage coil is installed in the cold storage tank, and the outlet of the second refrigeration unit is connected to the inlet of the ice storage coil and the first inlet of the heat exchanger. The two ends of the fifth pipe are respectively connected to the outlet of the ice storage coil and the inlet of the second refrigeration unit. The third switch valve and the third water pump are arranged sequentially from the ice storage coil to the second refrigeration unit, and the third water pump is oriented towards the second refrigeration unit. The two ends of the sixth pipe are respectively connected to the fifth pipe and the first outlet of the heat exchanger. The connection between the sixth pipe and the fifth pipe is set as the second connection. The second connection is located between the third switch valve and the third water pump. The fourth switch valve is located on the sixth pipe. The two ends of the seventh pipe are respectively connected to the second outlet of the heat exchanger and the first pipe. The fifth switch valve is located on the seventh pipe. The connection between the seventh pipe and the first pipe is designated as the third connection. The third connection is located between the outlet of the cold storage tank and the first water pump. The sixth switch valve is located on the first pipe and between the outlet of the cold storage tank and the third connection. The two ends of the eighth pipe are respectively connected to the second inlet of the heat exchanger and the second pipe. The seventh switch valve is located on the eighth pipe. The connection between the eighth pipe and the second pipe is designated as the fourth connection. The eighth switch valve is located on the second pipe and between the fourth connection and the second air inlet / outlet device. The two ends of the ninth pipe are respectively connected to the second pipe and the seventh pipe. The ninth switch valve is located on the ninth pipe. The connection between the ninth pipe and the second pipe is designated as the fifth connection point. The fifth connection point is located between the seventh switch valve and the second air inlet / outlet device. The connection between the ninth pipe and the seventh pipe is designated as the sixth connection point. The sixth connection point is located between the second outlet of the heat exchanger and the fifth switch valve. The first inlet and the first outlet of the heat exchanger are connected, and the second inlet and the second outlet of the heat exchanger are connected.

[0012] Optionally, a second controller may also be included; The second controller is connected to the second refrigeration unit, the first water pump, the third water pump, the third switching valve, the fourth switching valve, the fifth switching valve, the sixth switching valve, the seventh switching valve, the eighth switching valve, and the ninth switching valve; The second controller is configured to switch between a second host cold storage mode, a second independent cooling mode, a third independent cooling mode, and a second hybrid cooling mode; When the second controller switches to the second host cold storage mode, the second refrigeration host operates normally, the first water pump stops operating, the third water pump operates normally, the third switch valve is in the open state, the fourth switch valve is in the closed state, the fifth switch valve is in the closed state, the sixth switch valve is in the closed state, the seventh switch valve is in the closed state, the eighth switch valve is in the closed state, and the ninth switch valve is in the closed state. When the second controller switches to the second separate cooling mode, the second refrigeration unit stops running, the first water pump runs normally, the third water pump stops running, the third switch valve is in the closed state, the fourth switch valve is in the closed state, the fifth switch valve is in the open state, the sixth switch valve is in the open state, the seventh switch valve is in the closed state, the eighth switch valve is in the open state, and the ninth switch valve is in the open state. When the second controller switches to the third separate cooling mode, the second refrigeration unit operates normally, the first water pump operates normally, the third water pump operates normally, the third switch valve is in the closed state, the fourth switch valve is in the open state, the fifth switch valve is in the open state, the sixth switch valve is in the open state, the seventh switch valve is in the open state, the eighth switch valve is in the open state, and the ninth switch valve is in the closed state. When the second controller switches to the second hybrid cooling mode, the second refrigeration unit operates normally, the first water pump operates normally, the third water pump operates normally, the third switch valve is in the closed state, the fourth switch valve is in the open state, the fifth switch valve is in the open state, the sixth switch valve is in the open state, the seventh switch valve is in the open state, the eighth switch valve is in the open state, and the ninth switch valve is in the closed state.

[0013] Optionally, a temperature sensor is also included. The temperature sensor is disposed in the first pipe and located between the check valve and the first air intake / exhaust device. The temperature sensor is used to detect the temperature of the water in the first pipe and is connected to the fifth switching valve. When the fifth switch valve is in the open state, the water temperature detected by the temperature sensor is positively or negatively correlated with the opening degree of the fifth switch valve.

[0014] Compared with the prior art, the cold storage device of this invention has the following advantages: In the cold storage device of this invention, the cold storage tank and the terminal equipment are connected by a first pipe to directly transport water from the cold storage tank to the terminal equipment. A second pipe connects the cold storage tank and the terminal equipment to directly transport water from the terminal equipment back to the cold storage tank. The first pipe has a first protrusion higher than the terminal equipment, so that a portion of the first pipe is higher than both the terminal equipment and the cold storage tank. A first air inlet / outlet device is located on the side of the first protrusion closest to the cold storage tank, thereby preventing siphoning within the first pipe and preventing backflow of water from the terminal equipment into the cold storage tank within the first pipe. The second pipe has a second protrusion higher than the terminal equipment, so that part of the second pipe is higher than the terminal equipment and the cold storage tank. The second air inlet and outlet device is located on the side of the second protrusion near the cold storage tank to prevent siphoning in the second pipe and to prevent backflow of the water phase in the cold storage tank towards the terminal equipment. In summary, the cold storage device of the present invention does not have a heat exchanger between the cold storage tank and the terminal equipment, but directly exchanges heat through water. The heat exchange efficiency is high, the energy consumption is low, and backflow will not occur in the first and second pipes. The system has high stability and safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the most basic structure of the cold storage system of the present invention.

[0016] Figure 2 This is a schematic diagram of the cold storage system according to Embodiment 1 of the present invention.

[0017] Figure 3 This is a schematic diagram of the cold storage system according to Embodiment 2 of the present invention.

[0018] Figure 4 This is a schematic diagram of the second intake and exhaust device during normal operation of the cold storage system of the present invention.

[0019] Figure 5 This is a schematic diagram of the second intake and exhaust device when the cold storage system of the present invention experiences fluctuations.

[0020] Reference numerals: 1. Cold storage tank; 2. Terminal equipment; 3. First air intake / exhaust device; 4. Second air intake / exhaust device; 41. Container bottle; 411. Container cavity; 4111. First chamber; 4112. Second chamber; 4113. Third chamber; 412. Main air intake / exhaust port; 413. Secondary air intake / exhaust port; 414. Overflow port; 42. Float; 43. Partition net; 5a. First pipe; 5a1. First protrusion; 5b. Second pipe; 5b1. Second protrusion; 5c. Third pipe; 5d. Fourth pipe; 5e. Fifth pipe; 5f. Sixth pipe; 5g. Seventh pipe; 5h. Eighth pipe; 5i. Ninth pipe; 6a. First water pump; 6b. Second water pump; 6c. Third water pump; 7. Check valve; 8a. First refrigeration unit; 8b. Second refrigeration unit; 9a. First switching valve; 9b. Second switching valve; 9c. Third switching valve; 9d. Fourth switching valve; 9e. Fifth switching valve; 9f. Sixth switching valve; 9g. Seventh switching valve; 9h. Eighth switching valve; 9i. Ninth switching valve; 10. Temperature sensor; 20a. First connection; 20b. Second connection; 20c. Third connection; 20d. Fourth connection; 20e. Fifth connection; 20f. Sixth connection; 30. Ice storage coil; 40. Heat exchanger. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0022] In the description of this invention, it should be understood that the terms "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention 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, and therefore should not be construed as a limitation of this invention.

[0023] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] Example 1:

[0025] Reference Figure 1 and 2As shown, a cold storage system comprises a cold storage tank 1, a terminal device 2, a first pipeline 5a, a second pipeline 5b, a first air intake and exhaust device 3 and a second air intake and exhaust device 4; the cold storage tank 1 is lower than the terminal device 2; two ends of the first pipeline 5a are respectively connected to a water outlet of the cold storage tank 1 and a water inlet of the terminal device 2, the first pipeline 5a is provided with a first protrusion 5a1, the first protrusion 5a1 is higher than the terminal device 2, the first air intake and exhaust device 3 is arranged on the first pipeline 5a and located between the water outlet of the cold storage tank 1 and the first protrusion 5a1; two ends of the second pipeline 5b are respectively connected to a water inlet of the cold storage tank 1 and a water outlet of the terminal device 2, the second pipeline 5b is provided with a second protrusion 5b1, the second protrusion 5b1 is higher than the terminal device 2, the second air intake and exhaust device 4 is arranged on the second pipeline 5b and located between the water inlet of the cold storage tank 1 and the second protrusion 5b1, and an overflow port 414 and a water outlet of the second air intake and exhaust device 4 are connected to the cold storage tank 1.

[0026] In the above technical solution, the cold storage tank 1 and the terminal device 2 are connected through the first pipeline 5a, so as to directly deliver water from the cold storage tank 1 to the terminal device 2; the cold storage tank 1 and the terminal device 2 are connected through the second pipeline 5b, so as to directly deliver water from the terminal device 2 back to the cold storage tank 1. Wherein, the first pipeline 5a is provided with the first protrusion 5a1 higher than the terminal device 2, so that a partial position of the first pipeline 5a is higher than the terminal device 2 and the cold storage tank 1, and the first air intake and exhaust device 3 is arranged on a side of the first protrusion 5a1 close to the cold storage tank 1, thereby preventing siphon phenomenon from occurring in the first pipeline 5a and preventing water of the terminal device 2 from flowing backward in the first pipeline 5a toward the cold storage tank 1. Further, the second pipeline 5b is provided with the second protrusion 5b1 higher than the terminal device 2, so that a partial position of the second pipeline 5b is higher than the terminal device 2 and the cold storage tank 1, and the second air intake and exhaust device 4 is arranged on a side of the second protrusion 5b1 close to the cold storage tank 1, so as to prevent siphon phenomenon from occurring in the second pipeline 5b and prevent water in the cold storage tank 1 from flowing backward toward the terminal device 2. In conclusion, no heat exchanger 40 is arranged between the cold storage tank 1 and the terminal device 2 in the cold storage device of the present invention, and heat exchange is directly performed through water, so that the heat exchange efficiency is high, energy consumption is low, moreover, no backward flow occurs in the first pipeline 5a and the second pipeline 5b, and the system operation has high stability and safety.

[0027] In addition, the first protrusion 5a1 and the second protrusion 5b1 are at least 0.5m higher than the terminal device 2.

[0028] In addition, the first protrusion 5a1 and the second protrusion 5b1 can be of an n-shaped structure.

[0029] In addition, the terminal device 2 can be an air conditioner.

[0030] Furthermore, the first air intake / exhaust device 3 and the second air intake / exhaust device 4 can be rapid automatic air intake / exhaust valves. These rapid automatic air intake / exhaust valves are valves capable of rapidly responding to changes in system pressure: when the system starts or is filled with water, the valve can quickly expel air from the pipes or containers to avoid air blockage; when the system stops or experiences negative pressure, the valve can quickly introduce air to prevent the pipes from collapsing or being damaged due to vacuum; when the system is running normally, the valve can continuously discharge a small amount of accumulated gas to maintain smooth water flow; the valve, combined with the characteristic that its protrusion is higher than the end device 2, can break the siphon effect, thereby preventing backflow; specifically, the valve is typically a float ball 42 or a diaphragm structure, automatically opening and closing based on pressure difference and buoyancy.

[0031] Furthermore, refer to Figure 4 and Figure 5 It also includes a main intake and exhaust pipe and a secondary intake and exhaust pipe; the second intake and exhaust device 4 includes a receiving bottle 41, the receiving bottle 41 having a receiving cavity 411 inside, the outer surface of the receiving bottle 41 having a main intake and exhaust port 412 and a secondary intake and exhaust port 413 communicating with the receiving cavity 411, the main intake and exhaust port 412 being located below the secondary intake and exhaust port 413, one end of the main intake and exhaust pipe being connected to the main intake and exhaust port 412, and the other end being used to communicate with external air, one end of the main intake and exhaust pipe being connected to the and The second air inlet / outlet 413 is connected to the external air at one end. The inlet and outlet of the second air inlet / outlet device 4 are located on the outer surface of the container 41 and connected to the container cavity 411. The inlet and outlet of the second air inlet / outlet device 4 are lower than the secondary air inlet / outlet 413. The inlet of the second air inlet / outlet device 4 is connected to the terminal device 2, and the outlet of the second air inlet / outlet device 4 is connected to the inlet of the cold storage tank 1. The overflow port 414 of the second air inlet / outlet device 4 is located at... The outer surface of the container 41 is connected to the container cavity 411. The overflow port 414 of the second air inlet / outlet device 4 is higher than the inlet and outlet of the second air inlet / outlet device 4. The second air inlet / outlet device 4 also includes a float 42 and a partition net 43. The container cavity 411 includes a first chamber 4111, a second chamber 4112, and a third chamber 4113 arranged sequentially from bottom to top and connected to each other. The inlet and outlet of the second air inlet / outlet device 4, as well as the main air inlet / outlet 412, are connected to the container cavity 411. The first chamber 4111, the inlet and outlet 413 and the overflow port 414 are connected to the third chamber 4113, the partition net 43 is fixedly installed in the receiving cavity 411 and located between the first chamber 4111 and the second chamber 4112, and the float 42 is located in the second chamber 4112; when the water level in the receiving cavity 411 rises, the float 42 can move upward to the sealing position to close the connection between the second chamber 4112 and the third chamber 4113.

[0032] Among them, the water in the second pipe 5b located on one side of the second air intake and exhaust device 4 moves through the inlet of the second air intake and exhaust device 4 to the receiving cavity 411, and then moves through the outlet of the second air intake and exhaust device 4 to the other side of the second air intake and exhaust device 4. Reference Figure 4 Under normal circumstances, the first chamber 4111 is connected to the outside air through the main intake and exhaust pipes and the secondary intake and exhaust pipes, which has the effect of breaking the vacuum and enabling the system to operate stably; refer to Figure 5 When the pressure and flow rate fluctuate greatly in the system, the water level in the containment chamber 411 rises, and the float 42 moves upward to the sealing position, sealing the connection between the second chamber 4112 and the third chamber 4113 to prevent water overflow. Even if some water overflows upward to the third chamber 4113, it can be recovered into the cold storage tank 1 through the overflow port 414 of the air intake and exhaust device.

[0033] In addition, the partition net 43 is used to prevent the float 42 from falling into the first chamber 4111, thereby preventing the float 42 from passing through the inlet, outlet and main inlet / outlet of the second air inlet / outlet device 4 and then detaching from the container bottle 41.

[0034] In addition, the first chamber 4111, the second chamber 4112 and the third chamber 4113 can be vertically arranged cylindrical chambers. The diameter of the third chamber 4113 is smaller than the diameter of the second chamber 4112. The connection between the second chamber 4112 and the third chamber 4113 is provided with a transitional rounded corner or chamfer. When the water level in the receiving chamber 411 rises, the float 42 can abut against the rounded corner or chamfer to seal the connection between the second chamber 4112 and the third chamber 4113.

[0035] In addition, the secondary inlet / outlet 413 of the second inlet / outlet device 4 can be located on the top surface of the container bottle 41, and the main inlet / outlet 412, water inlet, water outlet and overflow outlet 414 of the second inlet / outlet device 4 can be located on the side of the container bottle 41.

[0036] Furthermore, the diameter of the main intake and exhaust pipe is equal to the diameter of the second pipe 5b, the diameter of the secondary intake and exhaust pipe is smaller than the diameter of the main intake and exhaust pipe, and the diameter of the float 42 is larger than the diameter of the secondary intake and exhaust pipe but smaller than the diameter of the main intake and exhaust pipe, in order to increase the efficiency of intake and exhaust, thereby increasing the stability of system operation; specifically, the diameter of the secondary intake and exhaust pipe is 2 to 4 sizes smaller than the diameter of the main intake and exhaust pipe, for example, if the diameter of the secondary intake and exhaust pipe is DN15, the diameter of the secondary intake and exhaust pipe is DN25.

[0037] Furthermore, it also includes a first water pump 6a and a check valve 7; the first water pump 6a and the check valve 7 are located in the first pipeline 5a, and the first water pump 6a and the check valve 7 are arranged sequentially from the cold storage tank 1 to the terminal device 2, with the first water pump 6a and the check valve 7 facing the terminal device 2. The first water pump 6a is used for water in the first pipeline 5a to flow towards the terminal device 2, and the check valve 7 is used to prevent water in the terminal device 2 from flowing back into the cold storage tank 1, further enhancing the safety of the system.

[0038] Furthermore, it also includes a first refrigeration unit 8a, a first switching valve 9a, a second switching valve 9b, a second water pump 6b, a third pipe 5c, and a fourth pipe 5d; the two ends of the third pipe 5c are respectively connected to the outlet of the first refrigeration unit 8a and the first pipe 5a, and the connection between the third pipe 5c and the first pipe 5a is set as a first connection 20a, which is located between the outlet of the first water pump 6a and the cold storage tank 1; the second switching valve 9b is located between the first connection 20a and the first water pump 6a; the two ends of the fourth pipe 5d are respectively connected to the inlet of the first refrigeration unit 8a and the cold storage tank 1; and the second water pump 6b is located on the fourth pipe 5d.

[0039] The above structure is a water-based cold storage system. It can achieve the functions of the main unit storing cold in the cold storage tank 1, the cold storage tank 1 supplying cold to the terminal equipment 2 alone, and the main unit and the cold storage tank 1 supplying cold to the terminal equipment 2 simultaneously by making each refrigeration unit operate normally or stop operating, making each water pump operate normally or stop operating, and making each switch valve open or closed.

[0040] Furthermore, it also includes a first controller; the first controller is connected to the first refrigeration unit 8a, the first water pump 6a, the second water pump 6b, the first switching valve 9a, and the second switching valve 9b; the first controller is configured to switch to a first main unit cold storage mode, a first independent cooling mode, and a first mixed cooling mode; when the first controller switches to the first main unit cold storage mode, the first refrigeration unit 8a operates normally, the first water pump 6a stops operating, the second water pump 6b operates normally, the first switching valve 9a is closed, and the second switching valve 9b is open; when the first controller switches to the first independent cooling mode, the first refrigeration unit 8a stops operating, the first water pump 6a operates normally, the second water pump 6b stops operating, the first switching valve 9a is open, and the second switching valve 9b is closed; when the first controller switches to the combined cooling mode, the first refrigeration unit 8a operates normally, the first water pump 6a operates normally, the second water pump 6b operates normally, the first switching valve 9a is open, and the second switching valve 9b is open.

[0041] In the first host cold storage mode, the host stores cold in the cold storage tank 1. When the first controller switches to this mode, water cannot flow between the cold storage tank 1 and the terminal device 2. The water in the cold storage tank 1 is transported to the first refrigeration host 8a through the fourth pipe 5d. The first refrigeration host 8a lowers the temperature of the water passing through it, and then the water is transported to the cold storage tank 1 through the third pipe 5c, so as to lower the temperature of the water in the cold storage tank 1 and achieve the effect of cold storage tank 1 storing cold.

[0042] The first independent cooling mode is a mode in which the cold storage tank 1 supplies cooling to the terminal device 2 alone. When the first controller switches to this mode, water cannot flow between the cold storage tank 1 and the first refrigeration unit 8a. The water in the cold storage tank 1 is transported to the terminal device 2 through the first pipe 5a. The water temperature rises through the terminal device 2, and then the water is transported to the cold storage tank 1 through the second pipe 5b to achieve the effect of reducing the temperature of the terminal device 2.

[0043] The first hybrid cooling mode is a mode in which the main unit and the cold storage tank 1 simultaneously supply cooling to the terminal device 2. When the first controller switches to this mode, the water in the cold storage tank 1 is transported to the first refrigeration main unit 8a through the fourth pipe 5d. The first refrigeration main unit 8a lowers the temperature of the water passing through it, and then the water is transported to the cold storage tank 1 through the third pipe 5c to lower the temperature of the water in the cold storage tank 1. At the same time, the water in the cold storage tank 1 is transported to the terminal device 2 through the first pipe 5a. The water temperature in the terminal device 2 rises, and then the water is transported to the cold storage tank 1 through the second pipe 5b to simultaneously achieve the effects of cold storage tank 1 storing cold and lowering the temperature of the terminal device 2.

[0044] Example 2:

[0045] Reference Figure 1 and 3 As shown, a cold storage system includes a cold storage tank 1, a terminal device 2, a first pipe 5a, a second pipe 5b, a first air intake / exhaust device 3, and a second air intake / exhaust device 4. The cold storage tank 1 is lower than the terminal device 2. The two ends of the first pipe 5a are respectively connected to the outlet of the cold storage tank 1 and the inlet of the terminal device 2. The first pipe 5a has a first protrusion 5a1, which is higher than the terminal device 2. The first air intake / exhaust device 3 is located on the first pipe 5a and is situated within the cold storage tank. Between the outlet of pool 1 and the first protrusion 5a1; the two ends of the second pipe 5b are respectively connected to the inlet of the cold storage pool 1 and the outlet of the terminal device 2. The second pipe 5b is provided with a second protrusion 5b1, which is higher than the terminal device 2. The second air intake and exhaust device 4 is provided on the second pipe 5b and is located between the inlet of the cold storage pool 1 and the second protrusion 5b1. The overflow port 414 and the outlet of the second air intake and exhaust device 4 are connected to the cold storage pool 1.

[0046] In the above technical solution, the cold storage tank 1 and the terminal device 2 are connected by a first pipe 5a to directly transport water from the cold storage tank 1 to the terminal device 2. A second pipe 5b connects the cold storage tank 1 and the terminal device 2 to directly transport water from the terminal device 2 back to the cold storage tank 1. The first pipe 5a has a first protrusion 5a1 higher than the terminal device 2, so that a portion of the first pipe 5a is higher than both the terminal device 2 and the cold storage tank 1. A first air intake / exhaust device 3 is located on the side of the first protrusion 5a1 closest to the cold storage tank 1, thereby preventing siphoning within the first pipe 5a and preventing backflow of water from the terminal device 2 into the cold storage tank 1 within the first pipe 5a. In one step, a second protrusion 5b1 higher than the terminal device 2 is provided on the second pipe 5b, so that part of the second pipe 5b is higher than the terminal device 2 and the cold storage tank 1, and the second air inlet and outlet device 4 is located on the side of the second protrusion 5b1 close to the cold storage tank 1 to prevent siphoning in the second pipe 5b and prevent backflow of water phase in the cold storage tank 1 towards the terminal device 2; in summary, the cold storage device of the present invention does not have a heat exchanger 40 between the cold storage tank 1 and the terminal device 2, but directly exchanges heat through water, which has high heat exchange efficiency, low energy consumption, and no backflow in the first pipe 5a and the second pipe 5b, resulting in high system stability and safety.

[0047] In addition, the first protrusion 5a1 and the second protrusion 5b1 are at least 20.5m higher than the end device.

[0048] In addition, the first protrusion 5a1 and the second protrusion 5b1 may be of a "Ji"-shaped structure.

[0049] In addition, the terminal device 2 may be an air conditioner.

[0050] Further, the first intake and exhaust device 3 and the second intake and exhaust device 4 may be rapid automatic intake and exhaust valves, wherein the rapid automatic intake and exhaust valve is a valve that can quickly respond to changes in system pressure: when the system is started or filled with water, the valve can quickly discharge the air in the pipe or container to avoid air resistance; when the system is shut down or negative pressure occurs, the valve can quickly introduce air to prevent the pipe from collapsing or being damaged due to vacuum; when the system is in normal operation, the valve can continuously discharge a small amount of accumulated gas to keep the water flow unobstructed; the valve cooperates with the characteristic that the protrusion is higher than the terminal device 2, which can break the siphon effect, thereby preventing backflow; specifically, the valve usually has a float 42 or diaphragm structure, and is automatically opened and closed by pressure difference and buoyancy.

[0051] Further, referring to Figure 4 and Figure 5It also includes a main intake and exhaust pipe and a secondary intake and exhaust pipe; the second intake and exhaust device 4 includes a receiving bottle 41, the receiving bottle 41 having a receiving cavity 411 inside, the outer surface of the receiving bottle 41 having a main intake and exhaust port 412 and a secondary intake and exhaust port 413 communicating with the receiving cavity 411, the main intake and exhaust port 412 being located below the secondary intake and exhaust port 413, one end of the main intake and exhaust pipe being connected to the main intake and exhaust port 412, and the other end being used to communicate with external air, one end of the main intake and exhaust pipe being connected to the and The second air inlet / outlet 413 is connected to the external air at one end. The inlet and outlet of the second air inlet / outlet device 4 are located on the outer surface of the container 41 and connected to the container cavity 411. The inlet and outlet of the second air inlet / outlet device 4 are lower than the secondary air inlet / outlet 413. The inlet of the second air inlet / outlet device 4 is connected to the terminal device 2, and the outlet of the second air inlet / outlet device 4 is connected to the inlet of the cold storage tank 1. The overflow port 414 of the second air inlet / outlet device 4 is located at... The outer surface of the container 41 is connected to the container cavity 411. The overflow port 414 of the second air inlet / outlet device 4 is higher than the inlet and outlet of the second air inlet / outlet device 4. The second air inlet / outlet device 4 also includes a float 42 and a partition net 43. The container cavity 411 includes a first chamber 4111, a second chamber 4112, and a third chamber 4113 arranged sequentially from bottom to top and connected to each other. The inlet and outlet of the second air inlet / outlet device 4, as well as the main air inlet / outlet 412, are connected to the container cavity 411. The first chamber 4111, the inlet and outlet 413 and the overflow port 414 are connected to the third chamber 4113, the partition net 43 is fixedly installed in the receiving cavity 411 and located between the first chamber 4111 and the second chamber 4112, and the float 42 is located in the second chamber 4112; when the water level in the receiving cavity 411 rises, the float 42 can move upward to the sealing position to close the connection between the second chamber 4112 and the third chamber 4113.

[0052] Among them, the water in the second pipe 5b located on one side of the second air intake and exhaust device 4 moves through the inlet of the second air intake and exhaust device 4 to the receiving cavity 411, and then moves through the outlet of the second air intake and exhaust device 4 to the other side of the second air intake and exhaust device 4. Reference Figure 4 Under normal circumstances, the first chamber 4111 is connected to the outside air through the main intake and exhaust pipes and the secondary intake and exhaust pipes, which has the effect of breaking the vacuum and enabling the system to operate stably; refer to Figure 5When the pressure and flow rate fluctuate greatly in the system, the water level in the containment chamber 411 rises, and the float 42 moves upward to the sealing position, sealing the connection between the second chamber 4112 and the third chamber 4113 to prevent water overflow. Even if some water overflows upward to the third chamber 4113, it can be recovered into the cold storage tank 1 through the overflow port 414 of the air intake and exhaust device.

[0053] In addition, the partition net 43 is used to prevent the float 42 from falling into the first chamber 4111, thereby preventing the float 42 from passing through the inlet, outlet and main inlet / outlet of the second air inlet / outlet device 4 and then detaching from the container bottle 41.

[0054] In addition, the first chamber 4111, the second chamber 4112 and the third chamber 4113 can be vertically arranged cylindrical chambers. The diameter of the third chamber 4113 is smaller than the diameter of the second chamber 4112. The connection between the second chamber 4112 and the third chamber 4113 is provided with a transitional rounded corner or chamfer. When the water level in the receiving chamber 411 rises, the float 42 can abut against the rounded corner or chamfer to seal the connection between the second chamber 4112 and the third chamber 4113.

[0055] In addition, the secondary inlet / outlet 413 of the second inlet / outlet device 4 can be located on the top surface of the container bottle 41, and the main inlet / outlet 412, water inlet, water outlet and overflow outlet 414 of the second inlet / outlet device 4 can be located on the side of the container bottle 41.

[0056] Furthermore, the diameter of the main intake and exhaust pipe is equal to the diameter of the second pipe 5b, the diameter of the secondary intake and exhaust pipe is smaller than the diameter of the main intake and exhaust pipe, and the diameter of the float 42 is larger than the diameter of the secondary intake and exhaust pipe but smaller than the diameter of the main intake and exhaust pipe, in order to increase the efficiency of intake and exhaust, thereby increasing the stability of system operation; specifically, the diameter of the secondary intake and exhaust pipe is 2 to 4 sizes smaller than the diameter of the main intake and exhaust pipe, for example, if the diameter of the secondary intake and exhaust pipe is DN15, the diameter of the secondary intake and exhaust pipe is DN25.

[0057] Furthermore, it also includes a first water pump 6a and a check valve 7; the first water pump 6a and the check valve 7 are located in the first pipeline 5a, and the first water pump 6a and the check valve 7 are arranged sequentially from the cold storage tank 1 to the terminal device 2, with the first water pump 6a and the check valve 7 facing the terminal device 2. The first water pump 6a is used for water in the first pipeline 5a to flow towards the terminal device 2, and the check valve 7 is used to prevent water in the terminal device 2 from flowing back into the cold storage tank 1, further enhancing the safety of the system.

[0058] Furthermore, it also includes a second refrigeration unit 8b, an ice storage coil 30, a heat exchanger 40, a third water pump 6c, a third switching valve 9c, a fourth switching valve 9d, a fifth switching valve 9e, a sixth switching valve 9f, a seventh switching valve 9g, an eighth switching valve 9h, a ninth switching valve 9i, a fifth pipe 5e, a sixth pipe 5f, a seventh pipe 5g, an eighth pipe 5h, and a ninth pipe 5i; the ice storage coil 30 is located in the cold storage tank 1, and the outlet of the second refrigeration unit 8b is connected to the inlet of the ice storage coil 30 and the first inlet of the heat exchanger 40; the two ends of the fifth pipe 5e are respectively connected to the outlet of the ice storage coil 30 and the inlet of the second refrigeration unit 8b, and the third switching valve 9c... The third water pump 6c is arranged sequentially from the ice storage coil 30 to the second refrigeration unit 8b, with the third water pump 6c facing the second refrigeration unit 8b; the two ends of the sixth pipe 5f are respectively connected to the fifth pipe 5e and the first outlet of the heat exchanger 40, and the connection between the sixth pipe 5f and the fifth pipe 5e is designated as the second connection point 20b, which is located between the third switch valve 9c and the third water pump 6c; the fourth switch valve 9d is located on the sixth pipe 5f; the two ends of the seventh pipe 5g are respectively connected to the second outlet of the heat exchanger 40 and the first pipe 5a, and the fifth switch valve 9e is located on the seventh pipe 5g. The connection between pipe 5g and the first pipe 5a is designated as a third connection 20c, which is located between the outlet of the cold storage tank 1 and the first water pump 6a. The sixth switch valve 9f is located on the first pipe 5a, between the outlet of the cold storage tank 1 and the third connection 20c. The two ends of the eighth pipe 5h are respectively connected to the second inlet of the heat exchanger 40 and the second pipe 5b. The seventh switch valve 9g is located on the eighth pipe 5h. The connection between the eighth pipe 5h and the second pipe 5b is designated as a fourth connection 20d. The eighth switch valve 9h is located on the second pipe 5b, between the fourth connection 20d and the second air inlet / outlet device. Between 4; the two ends of the ninth pipe 5i are respectively connected to the second pipe 5b and the seventh pipe 5g, the ninth switch valve 9i is provided on the ninth pipe 5i, the connection between the ninth pipe 5i and the second pipe 5b is designated as the fifth connection 20e, the fifth connection 20e is located between the seventh switch valve 9g and the second air inlet and outlet device 4, the connection between the ninth pipe 5i and the seventh pipe 5g is designated as the sixth connection 20f, the sixth connection 20f is located between the second outlet of the heat exchanger 40 and the fifth switch valve 9e; wherein, the first inlet and the first outlet of the heat exchanger 40 are connected, and the second inlet and the second outlet of the heat exchanger 40 are connected.

[0059] The aforementioned structure is an ice storage system. It can achieve the following functions by enabling the refrigeration units to operate normally or stop, the water pumps to operate normally or stop, and the valves to be in the open or closed states: the refrigeration units can store cold water in the storage tank 1; the storage tank 1 can supply cold water to the terminal equipment 2 independently; the refrigeration units can supply cold water to the terminal equipment 2 independently; and the refrigeration units and the storage tank 1 can supply cold water to the terminal equipment 2 simultaneously. Furthermore, it also includes a second controller; the second controller is connected to the second refrigeration unit 8b, the first water pump 6a, the third water pump 6c, the third switching valve 9c, the fourth switching valve 9d, the fifth switching valve 9e, the sixth switching valve 9f, the seventh switching valve 9g, the eighth switching valve 9h, and the ninth switching valve 9i; the second controller is configured to switch to a second unit cold storage mode, a second independent cooling mode, a third independent cooling mode, and a second mixed cooling mode; when the second controller switches to the second unit cold storage mode, the second refrigeration unit 8b operates normally. When the first water pump 6a stops operating, the third water pump 6c operates normally, the third switching valve 9c is open, the fourth switching valve 9d is closed, the fifth switching valve 9e is closed, the sixth switching valve 9f is closed, the seventh switching valve 9g is closed, the eighth switching valve 9h is closed, and the ninth switching valve 9i is closed; when the second controller switches to the second independent cooling mode, the second refrigeration unit 8b stops operating, the first water pump 6a operates normally, the third water pump 6c stops operating, and the third switching valve 9c is closed. The fourth switch valve 9d is closed, the fifth switch valve 9e is open, the sixth switch valve 9f is open, the seventh switch valve 9g is closed, the eighth switch valve 9h is open, and the ninth switch valve 9i is open. When the second controller switches to the third independent cooling mode, the second refrigeration unit 8b operates normally, the first water pump 6a operates normally, the third water pump 6c operates normally, the third switch valve 9c is closed, the fourth switch valve 9d is open, the fifth switch valve 9e is open, and the sixth switch valve 9f is open. The seventh switch valve 9g is in the open state, the eighth switch valve 9h is in the open state, and the ninth switch valve 9i is in the closed state. When the second controller switches to the second mixed cooling mode, the second refrigeration unit 8b operates normally, the first water pump 6a operates normally, the third water pump 6c operates normally, the third switch valve 9c is in the closed state, the fourth switch valve 9d is in the open state, the fifth switch valve 9e is in the open state, the sixth switch valve 9f is in the open state, the seventh switch valve 9g is in the open state, the eighth switch valve 9h is in the open state, and the ninth switch valve 9i is in the closed state.

[0060] In the second host cold storage mode, the host stores cold in the cold storage pool 1. When the first controller switches to this mode, the water between the second refrigeration host 8b and the heat exchanger 40 cannot flow between each other, and the water between the cold storage pool 1, the terminal equipment 2 and the heat exchanger 40 cannot flow between each other. The water in the ice storage coil 30 is transported to the second refrigeration host 8b through the fifth pipe 5e. The second refrigeration host 8b lowers the temperature of the water passing through it, and then transports the water back to the ice storage coil 30 so that the temperature of the medium in the cold storage pool 1 is lowered, thereby achieving the effect of cold storage in the cold storage pool 1.

[0061] The second independent cooling mode is a mode in which the cold storage tank 1 provides independent cooling to the terminal device 2. When the first controller switches to this mode, the water between the second refrigeration unit 8b, the ice storage coil 30 and the heat exchanger 40 cannot flow to each other, and the water between the cold storage tank 1 and the heat exchanger 40 cannot flow. The water in the cold storage tank 1 is transported to the terminal device 2 through the first pipe 5a. The water temperature rises through the terminal device 2, and then the water is transported to the second pipe 5b. Part of the water in the second pipe 5b continues to be transported to the cold storage tank 1 through the second pipe 5b, and the other part of the water flows into the water in the first pipe 5a through the ninth pipe 5i and the seventh pipe 5g in sequence, and then is transported to the terminal device 2 again to achieve the effect of reducing the temperature of the terminal device 2.

[0062] The third independent cooling mode is a mode in which the main unit provides independent cooling to the terminal device 2. When the first controller switches to this mode, the water in the second refrigeration unit 8b and the ice storage coil 30 cannot circulate with each other, while the water between the second refrigeration unit 8b and the heat exchanger 40 circulates with each other. The temperature of the water passing through the second refrigeration unit 8b decreases, the temperature of the water passing through one side of the heat exchanger 40 increases, and the temperature of the water passing through the other side of the heat exchanger 40 decreases. Then, the water is sequentially transported to the terminal device 2 through the seventh pipe 5g and the first pipe 5a. The temperature of the water passing through the terminal device 2 increases, and then the water is sequentially transported to the heat exchanger 40 through the second pipe 5b and the eighth pipe 5h to achieve the effect of reducing the temperature of the terminal device 2. In this mode, the cold storage tank 1 plays the role of constant pressure water replenishment.

[0063] The second hybrid cooling mode is a mode in which the main unit and the cold storage tank 1 simultaneously supply cooling to the terminal device 2. When the first controller switches to this mode, the water between the second refrigeration main unit 8b and the ice storage coil 30 cannot flow between them, while the water between the second refrigeration main unit 8b and the heat exchanger 40 flows between them. The temperature of the water passing through the second refrigeration main unit 8b decreases, the temperature of the water passing through one side of the heat exchanger 40 increases, and the temperature of the water passing through the other side of the heat exchanger 40 decreases. The water output from the inlet of the heat exchanger 40 flows into the first pipe 5a through the seventh pipe 5g. The water output from the outlet of the cold storage tank 1 is transported to the terminal device 2 through the second pipe 5b. The temperature of the water passing through the terminal device 2 increases, and then the water is transported back to the second pipe 5b. Part of the water in the second pipe 5b continues to be transported to the cold storage tank 1 through the second pipe 5b, and the other part of the water is transported to the heat exchanger 40 through the eighth pipe 5h in sequence, so as to achieve the effect of reducing the temperature of the terminal device 2.

[0064] Furthermore, a temperature sensor 10 is also included. The temperature sensor 10 is located in the first pipe 5a and between the check valve 7 and the first air intake / exhaust device 3. The temperature sensor 10 is used to detect the temperature of the water in the first pipe 5a and is connected to the fifth switching valve 9e. When the fifth switching valve 9e is in the open state, the water temperature detected by the temperature sensor 10 is positively or negatively correlated with the opening degree of the fifth switching valve 9e. Specifically, when the second controller switches to the second separate cooling mode, the water temperature detected by the temperature sensor 10 is negatively correlated with the opening degree of the fifth switching valve 9e. That is, the higher the temperature, the lower the opening degree of the fifth switching valve 9e, so as to reduce the amount of water output from the outlet of the terminal device 2 flowing into the second pipe 5b and increase the amount of water transported back to the cold storage tank 1, so as to minimize the temperature of the water transported to the terminal device 2 and enhance the cooling effect.

[0065] In summary, the embodiments of the present invention provide a cold storage system, the technical effects of which are as follows: In the cold storage device of the present invention, the cold storage tank 1 and the terminal device 2 are connected by a first pipe 5a to directly transport water from the cold storage tank 1 to the terminal device 2. A second pipe 5b connects the cold storage tank 1 and the terminal device 2 to directly transport water from the terminal device 2 back to the cold storage tank 1. The first pipe 5a has a first protrusion 5a1 higher than the terminal device 2, so that a portion of the first pipe 5a is higher than both the terminal device 2 and the cold storage tank 1. A first air intake / exhaust device 3 is located on the side of the first protrusion 5a1 closest to the cold storage tank 1, thereby preventing siphoning within the first pipe 5a and preventing backflow of water from the terminal device 2 into the cold storage tank 1 within the first pipe 5a. In one step, a second protrusion 5b1 higher than the terminal device 2 is provided on the second pipe 5b, so that part of the second pipe 5b is higher than the terminal device 2 and the cold storage tank 1, and the second air inlet and outlet device 4 is located on the side of the second protrusion 5b1 close to the cold storage tank 1 to prevent siphoning in the second pipe 5b and prevent backflow of water phase in the cold storage tank 1 towards the terminal device 2; in summary, the cold storage device of the present invention does not have a heat exchanger 40 between the cold storage tank 1 and the terminal device 2, but directly exchanges heat through water, which has high heat exchange efficiency, low energy consumption, and no backflow in the first pipe 5a and the second pipe 5b, resulting in high system stability and safety.

[0066] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A cold storage system, characterized in that, Comprising a cold storage tank (1), a terminal device (2), a first pipe (5a), a second pipe (5b), a first air intake and exhaust device (3) and a second air intake and exhaust device (4); The cold storage tank (1) is lower than the terminal device (2); Two ends of the first pipe (5a) are respectively connected to a water outlet of the cold storage tank (1) and a water inlet of the terminal device (2), the first pipe (5a) is provided with a first protrusion (5a1), the first protrusion (5a1) is of an inverted U-shaped structure, the first protrusion (5a1) is higher than the terminal device (2), the first air intake and exhaust device (3) is arranged on the first pipe (5a) and located between the water outlet of the cold storage tank (1) and the first protrusion (5a1), the first air intake and exhaust device (3) is arranged on a side of the first protrusion (5a1) close to the cold storage tank (1); Two ends of the second pipe (5b) are respectively connected to a water inlet of the cold storage tank (1) and a water outlet of the terminal device (2), the second pipe (5b) is provided with a second protrusion (5b1), the second protrusion (5b1) is higher than the terminal device (2), the second air intake and exhaust device (4) is arranged on the second pipe (5b) and located between the water inlet of the cold storage tank (1) and the second protrusion (5b1); further comprising a main air intake and exhaust pipe and a secondary air intake and exhaust pipe; The second air intake and exhaust device (4) comprises a containing bottle (41), a containing cavity (411) is arranged in the containing bottle (41), an outer surface of the containing bottle (41) is provided with a main air intake and exhaust port (412) and a secondary air intake and exhaust port (413) communicated with the containing cavity (411), the main air intake and exhaust port (412) is located below the secondary air intake and exhaust port (413), one end of the main air intake and exhaust pipe is connected to the main air intake and exhaust port (412), and the other end is for communicating with outside air, one end of the secondary air intake and exhaust pipe is connected to the secondary air intake and exhaust port (413), and the other end is for communicating with outside air, a water inlet and a water outlet of the second air intake and exhaust device (4) are arranged on the outer surface of the containing bottle (41) and communicated with the containing cavity (411), the water inlet and the water outlet of the second air intake and exhaust device (4) are lower than the secondary air intake and exhaust port (413), the water inlet of the second air intake and exhaust device (4) is connected to the terminal device (2), the water outlet of the second air intake and exhaust device (4) is connected to the water inlet of the cold storage tank (1), an overflow port (414) of the second air intake and exhaust device (4) is arranged on the outer surface of the containing bottle (41) and communicated with the containing cavity (411), the overflow port (414) of the second air intake and exhaust device (4) is higher than the water inlet and the water outlet of the second air intake and exhaust device (4), the overflow port (414) and the water outlet of the second air intake and exhaust device (4) are connected to the cold storage tank (1); The second air intake and exhaust device (4) further includes a float (42) and a partition net (43). The accommodating cavity (411) includes a first chamber (4111), a second chamber (4112), and a third chamber (4113) arranged sequentially from bottom to top and connected to each other. The water inlet and outlet of the second air intake and exhaust device (4) and the main air intake and exhaust port (412) are connected to the first chamber (4111). The secondary air intake and exhaust port (413) and the overflow port (414) are connected to the third chamber (4113). The partition net (43) is fixedly installed in the accommodating cavity (411) and is located between the first chamber (4111) and the second chamber (4112). The float (42) is located in the second chamber (4112). When the water level in the receiving cavity (411) rises, the float (42) can move upward to a sealed position to close the connection between the second chamber (4112) and the third chamber (4113); The diameter of the main intake and exhaust pipe is equal to the diameter of the second pipe (5b), the diameter of the secondary intake and exhaust pipe is smaller than the diameter of the main intake and exhaust pipe, and the diameter of the float (42) is larger than the diameter of the secondary intake and exhaust pipe and smaller than the diameter of the main intake and exhaust pipe. It also includes a first water pump (6a) and a check valve (7); The first water pump (6a) and the check valve (7) are located in the first pipeline (5a). The first water pump (6a) and the check valve (7) are arranged sequentially from the cold storage tank (1) to the terminal device (2). The first water pump (6a) and the check valve (7) are arranged facing the terminal device (2).

2. The cold storage system according to claim 1, characterized in that, The first intake and exhaust device (3) and / or the second intake and exhaust device (4) are fast automatic intake and exhaust valves.

3. The cold storage system according to claim 1, characterized in that, It also includes a first refrigeration unit (8a), a first switching valve (9a), a second switching valve (9b), a second water pump (6b), a third pipe (5c), and a fourth pipe (5d); The two ends of the third pipe (5c) are respectively connected to the outlet of the first refrigeration unit (8a) and the first pipe (5a). The connection between the third pipe (5c) and the first pipe (5a) is set as the first connection point (20a). The first connection point (20a) is located between the outlet of the first water pump (6a) and the cold storage tank (1). The second switch valve (9b) is located between the first connection point (20a) and the first water pump (6a). The two ends of the fourth pipe (5d) are respectively connected to the inlet of the first refrigeration unit (8a) and the cold storage tank (1). The second water pump (6b) is located on the fourth pipe (5d).

4. The cold storage system according to claim 3, characterized in that, It also includes the first controller; The first controller is connected to the first refrigeration unit (8a), the first water pump (6a), the second water pump (6b), the first switching valve (9a), and the second switching valve (9b); The first controller is configured to switch between a first host cold storage mode, a first independent cooling mode, and a first hybrid cooling mode; When the first controller switches to the first host cold storage mode, the first refrigeration host (8a) operates normally, the first water pump (6a) stops operating, the second water pump (6b) operates normally, the first switch valve (9a) is in the closed state, and the second switch valve (9b) is in the open state. When the first controller switches to the first separate cooling mode, the first refrigeration unit (8a) stops operating, the first water pump (6a) operates normally, the second water pump (6b) stops operating, the first switch valve (9a) is in the open state, and the second switch valve (9b) is in the closed state. When the first controller switches to the combined cooling mode, the first refrigeration unit (8a) operates normally, the first water pump (6a) operates normally, the second water pump (6b) operates normally, the first switch valve (9a) is in the open state, and the second switch valve (9b) is in the open state.

5. The cold storage system according to claim 1, characterized in that, It also includes a second refrigeration unit (8b), an ice storage coil (30), a heat exchanger (40), a third water pump (6c), a third switching valve (9c), a fourth switching valve (9d), a fifth switching valve (9e), a sixth switching valve (9f), a seventh switching valve (9g), an eighth switching valve (9h), a ninth switching valve (9i), a fifth pipe (5e), ​​and a sixth pipe (5f). The seventh conduit (5g), the eighth conduit (5h), and the ninth conduit (5i); The ice storage coil (30) is located in the cold storage tank (1), and the outlet of the second refrigeration unit (8b) is connected to the inlet of the ice storage coil (30) and the first inlet of the heat exchanger (40). The two ends of the fifth pipe (5e) are respectively connected to the outlet of the ice storage coil (30) and the inlet of the second refrigeration unit (8b). The third switch valve (9c) and the third water pump (6c) are arranged sequentially from the ice storage coil (30) to the second refrigeration unit (8b), and the third water pump (6c) is arranged facing the second refrigeration unit (8b). The two ends of the sixth pipe (5f) are respectively connected to the fifth pipe (5e) and the first outlet of the heat exchanger (40). The connection between the sixth pipe (5f) and the fifth pipe (5e) is set as the second connection (20b). The second connection (20b) is located between the third switch valve (9c) and the third water pump (6c). The fourth switch valve (9d) is located on the sixth pipe (5f). The two ends of the seventh pipe (5g) are respectively connected to the second outlet of the heat exchanger (40) and the first pipe (5a). The fifth switch valve (9e) is located on the seventh pipe (5g). The connection between the seventh pipe (5g) and the first pipe (5a) is designated as the third connection (20c). The third connection (20c) is located between the outlet of the cold storage tank (1) and the first water pump (6a). The sixth switch valve (9f) is located on the first pipe (5a) and between the outlet of the cold storage tank (1) and the third connection (20c). The two ends of the eighth pipe (5h) are respectively connected to the second inlet of the heat exchanger (40) and the second pipe (5b). The seventh switch valve (9g) is located on the eighth pipe (5h). The connection between the eighth pipe (5h) and the second pipe (5b) is set as the fourth connection (20d). The eighth switch valve (9h) is located on the second pipe (5b) and between the fourth connection (20d) and the second air intake and exhaust device (4). The two ends of the ninth pipe (5i) are respectively connected to the second pipe (5b) and the seventh pipe (5g). The ninth switch valve (9i) is located on the ninth pipe (5i). The connection between the ninth pipe (5i) and the second pipe (5b) is designated as the fifth connection point (20e). The fifth connection (20e) is located between the seventh switch valve (9g) and the second air intake / exhaust device (4), and the connection between the ninth pipe (5i) and the seventh pipe (5g) is set as the sixth connection (20f). The sixth connection (20f) is located between the second outlet of the heat exchanger (40) and the fifth switch valve (9e). The first inlet and the first outlet of the heat exchanger (40) are connected, and the second inlet and the second outlet of the heat exchanger (40) are connected.

6. The cold storage system according to claim 5, characterized in that, It also includes a second controller; The second controller is connected to the second refrigeration unit (8b), the first water pump (6a), the third water pump (6c), the third switching valve (9c), the fourth switching valve (9d), the fifth switching valve (9e), the sixth switching valve (9f), the seventh switching valve (9g), the eighth switching valve (9h), and the ninth switching valve (9i). The second controller is configured to switch between a second host cold storage mode, a second independent cooling mode, a third independent cooling mode, and a second hybrid cooling mode; When the second controller switches to the second host cold storage mode, the second refrigeration host (8b) operates normally, the first water pump (6a) stops operating, the third water pump (6c) operates normally, the third switch valve (9c) is in the open state, the fourth switch valve (9d) is in the closed state, the fifth switch valve (9e) is in the closed state, the sixth switch valve (9f) is in the closed state, the seventh switch valve (9g) is in the closed state, the eighth switch valve (9h) is in the closed state, and the ninth switch valve (9i) is in the closed state. When the second controller switches to the second separate cooling mode, the second refrigeration unit (8b) stops running, the first water pump (6a) runs normally, the third water pump (6c) stops running, the third switch valve (9c) is in the closed state, the fourth switch valve (9d) is in the closed state, the fifth switch valve (9e) is in the open state, the sixth switch valve (9f) is in the open state, the seventh switch valve (9g) is in the closed state, the eighth switch valve (9h) is in the open state, and the ninth switch valve (9i) is in the open state. When the second controller switches to the third separate cooling mode, the second refrigeration unit (8b) operates normally, the first water pump (6a) operates normally, the third water pump (6c) operates normally, the third switch valve (9c) is in the closed state, the fourth switch valve (9d) is in the open state, the fifth switch valve (9e) is in the open state, the sixth switch valve (9f) is in the open state, the seventh switch valve (9g) is in the open state, the eighth switch valve (9h) is in the open state, and the ninth switch valve (9i) is in the closed state. When the second controller switches to the second hybrid cooling mode, the second refrigeration unit (8b) operates normally, the first water pump (6a) operates normally, the third water pump (6c) operates normally, the third switch valve (9c) is in the closed state, the fourth switch valve (9d) is in the open state, the fifth switch valve (9e) is in the open state, the sixth switch valve (9f) is in the open state, the seventh switch valve (9g) is in the open state, the eighth switch valve (9h) is in the open state, and the ninth switch valve (9i) is in the closed state.

7. The cold storage system according to claim 5 or 6, characterized in that, It also includes a temperature sensor (10), which is located in the first pipe (5a) and between the check valve (7) and the first air intake and exhaust device (3). The temperature sensor (10) is used to detect the temperature of the water in the first pipe (5a) and is connected to the fifth switch valve (9e). When the fifth switch valve (9e) is in the open state, the water temperature detected by the temperature sensor (10) is positively or negatively correlated with the opening degree of the fifth switch valve (9e).

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