Control system and method and refrigeration equipment

Abstract

The invention provides a control system and method and refrigeration equipment. The control system comprises a condenser and an evaporator device which are connected in sequence. The supply device and the spraying device are connected, and the supply device is used for conveying defrosting liquid for the spraying device; the spraying device is arranged above the evaporator device and used for conducting spraying defrosting on the evaporator device. The first energy storage heat exchange device is used for heat exchange and heat storage; the first energy storage heat exchange device is provided with at least two first phase change energy storage heat exchangers, and each first phase change energy storage heat exchanger is provided with a first circulation part used for circulation of a refrigerant and a second circulation part used for circulation of defrosting liquid. Each first circulation part is connected with the condenser and the evaporator in an on-off mode. According to the control system, the technical problem that in the prior art, under the conditions that the condensing temperature is low and the frost layer is thick, heat stored in the heat exchanger possibly cannot meet the heat requirement for defrosting, and consequently the defrosting effect is poor is effectively solved.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a control system, method and refrigeration equipment. Background Art

[0002] In industries such as cold storage and cold chain transportation, the evaporator in the refrigeration equipment is prone to frost due to the low refrigeration environment temperature requirements. Frosting of the evaporator will affect air flow and reduce heat exchange efficiency, thus failing to achieve the expected refrigeration effect. Therefore, the evaporator needs to be defrosted regularly.

[0003] At present, in order to save energy and improve the refrigeration effect by reducing the temperature of the refrigerant, a heat exchanger is usually set at the outlet of the condenser to absorb the waste heat of the refrigerant and store it so that it can be used when defrosting is required. However, when the condensing temperature is low, the heat release capacity of the refrigerant is weakened, resulting in a decrease in the waste heat available in the heat exchanger. This means that when defrosting, the stored waste heat may not be enough to provide the required heat, thus affecting the efficiency of the defrosting process.

[0004] In addition, when the frost layer is thicker, the heat required for defrosting will increase significantly. The thick frost layer not only increases the thermal resistance and reduces the heat exchange efficiency, but also requires more heat to melt the frost layer. If the residual heat stored in the heat exchanger is insufficient, the defrosting time will be extended. Therefore, the system in the prior art may have energy imbalance when the condensing temperature is low and the frost layer is thicker, and cannot meet the heat demand for defrosting. This not only prolongs the defrosting time, but may also cause the system efficiency to decrease and increase the operating cost. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide a control system, method and refrigeration equipment to solve the technical problem in the prior art that when the condensation temperature is low and the frost layer is thick, the heat stored in the heat exchanger may not meet the heat demand for defrosting, resulting in poor defrosting effect.

[0006] To achieve the above technical objectives, according to one aspect of the present invention: a control system is provided, comprising: a condenser and an evaporator device connected in sequence; a supply device and a spray device connected thereto, the supply device being used to deliver defrosting liquid to the spray device; the spray device being arranged above the evaporator device for spraying and defrosting the evaporator device; a first energy storage heat exchange device for heat exchange and heat storage; the first energy storage heat exchange device having at least two first phase-change energy storage heat exchangers, each of which is provided with a first circulation part for circulation of refrigerant and a second circulation part for circulation of defrosting liquid; each first circulation part is respectively connected to the condenser and the evaporator in a switchable manner, and each The second circulation parts are respectively connected to the supply device and the spray device in a disconnectable manner; wherein, in the refrigeration mode, the connections of the first circulation parts with the condenser and the evaporator devices are controlled in turn, so that the phase change materials of each first phase change energy storage heat exchanger absorb the heat released by the refrigerant flowing into the corresponding first circulation parts in turn and store it, and the second circulation parts are controlled to be disconnected from the supply device and the spray device respectively; in the defrost mode, the first circulation parts are controlled to be disconnected from the condenser and the evaporator devices respectively, and the connections of the second circulation parts with the supply device and the spray device are adaptively controlled according to the current temperature of the phase change materials of each first phase change energy storage heat exchanger.

[0007] Furthermore, the control system also includes: a control device, which is used to determine whether to switch from the refrigeration mode to the defrost mode and obtain the current temperature of the phase change material of each first phase change energy storage heat exchanger, and according to the judgment result and the current temperature of each phase change material, adaptively control the connection and disconnection of each first circulation part with the condenser and evaporator devices, as well as the connection and disconnection of each second circulation part with the supply device and the spray device.

[0008] Furthermore, the control system also includes: at least two first control valves, each first control valve is arranged in a one-to-one correspondence with each first phase change energy storage heat exchanger, each first control valve is respectively connected to the input end of the corresponding first flow part and the output end of the condenser; each first control valve is used to control the connection between the corresponding first flow part and the condenser; a second control valve, the input end of the second control valve is respectively connected to the output end of each first flow part, and the output end of the second control valve is connected to the input end of the evaporator device; the second control valve is used to control the connection between each first flow part and the evaporator device.

[0009] Furthermore, the control system also includes: a third control valve, the input end of the third control valve is connected to the output end of the supply device, and the output end of the third control valve is respectively connected to the input end of each second circulation part; the third control valve is used to control the on-off between the supply device and the input end of each second circulation part; at least two fourth control valves, each fourth control valve is arranged in a one-to-one correspondence with each first phase change energy storage heat exchanger, each fourth control valve is respectively arranged between the third control valve and the input end of the corresponding second circulation part, and each fourth control valve is respectively connected to the input end of the corresponding second circulation part and the output end of the third control valve.

[0010] Furthermore, the control system also includes: a filtering device, which is arranged between the supply device and the first energy storage and heat exchange device, and is respectively connected to the input end of the supply device and the input end of each second circulation part; the filtering device is used to filter the defrost liquid.

[0011] Furthermore, the evaporator device includes: at least one evaporator, the input end of the evaporator is connectable and disconnectable to the output end of each first circulation part; the supply device includes: at least one water receiving tray, the water receiving tray is arranged in a one-to-one correspondence with the evaporator, the water receiving tray is arranged below the corresponding evaporator, the water receiving tray is used to collect the defrost liquid flowing down from the evaporator and store it; the output end of the water receiving tray is respectively connectable and disconnectable to the input end of each second circulation part.

[0012] Furthermore, the supply device also includes: at least one water pump, which is arranged in a one-to-one correspondence with the water receiving tray, the input end of the water pump is connected to the output end of the corresponding water receiving tray, and the output end of the water pump is respectively connected to the input end of each second circulation part in a disconnectable manner; and / or, a water supply pipeline, which is connected to the water receiving tray, and the water supply pipeline is used to connect the water tray to replenish defrost liquid.

[0013] Furthermore, the evaporator device includes: an evaporator, the input end of at least one evaporator is connectable to the output end of each first circulation part; the spray device includes: at least one sprayer, the sprayer is arranged in a one-to-one correspondence with the evaporator, the sprayer is arranged above the corresponding evaporator, and the sprayer is used to spray defrost liquid onto the corresponding evaporator for defrosting; the input end of the sprayer is connectable to the output end of each second circulation part.

[0014] Furthermore, the control system also includes: at least one fifth control valve, which is arranged in a one-to-one correspondence with the sprinkler, and the fifth control valve is respectively connected to the input end of the corresponding sprinkler and the output end of each second flow part; the fifth control valve is used to control the connection and disconnection between the output end of each second flow part and the corresponding sprinkler.

[0015] Furthermore, each first phase-change energy storage heat exchanger is provided with a first temperature detection device, and the first temperature detection device on each first phase-change energy storage heat exchanger is used to detect the temperature of the phase change material of the corresponding first phase-change energy storage heat exchanger; wherein each first temperature detection device is connected to the control device, and each first temperature detection device sends the detected temperature of the phase change material of the corresponding first phase-change energy storage heat exchanger to the control device.

[0016] Furthermore, the control system also includes: a second energy storage heat exchange device for heat exchange and heat storage; the second energy storage heat exchange device has at least two second phase change energy storage heat exchangers, and each second phase change energy storage heat exchanger is provided with a third flow part for the circulation of refrigerant and a fourth flow part for the circulation of defrost liquid; each third flow part is connected to the condenser and the evaporator in a switchable manner, and each fourth flow part is connected to the supply device and the spray device in a switchable manner; the first energy storage heat exchange device and the second energy storage heat exchange device are arranged in parallel; a control device, the control device is used to obtain the current outdoor temperature, so as to selectively control the refrigerant and the defrost liquid to flow to the first energy storage heat exchange device or the second energy storage heat exchange device according to the current outdoor temperature.

[0017] According to another aspect of the present invention, a refrigeration device is provided, comprising: the above-mentioned control system.

[0018] According to another aspect of the present invention: a control method is provided, and the control method is applied to the above-mentioned control system, and the control method includes: after the refrigeration mode is running, controlling the flow path of the refrigerant and judging whether to switch to the defrost mode; if the refrigerant flowing out of the condenser is controlled to flow to the first energy storage heat exchange device, controlling the connection of each first flow part with the condenser and the evaporator device respectively in turn, so that the phase change material of each first phase change energy storage heat exchanger absorbs the heat released by the refrigerant flowing into the corresponding first flow part in turn and stores it; if the refrigeration mode is switched to the defrost mode, obtaining the current temperature value of the phase change material of each first phase change energy storage heat exchanger; according to the current temperature value of the phase change material of each first phase change energy storage heat exchanger, adaptively controlling the connection of each second flow part with the supply device and the spray device respectively, so that the defrost liquid flowing into at least one of the second flow parts absorbs the heat released by the corresponding phase change material, and the defrost liquid after absorbing the heat flows to the spray device.

[0019] Furthermore, if the refrigeration mode is switched to the defrost mode, and according to the current temperature value of the phase change material of each first phase change energy storage heat exchanger, the method of adaptively controlling the connection of each second circulation part with the supply device and the spray device respectively includes: if the refrigeration mode is switched to the defrost mode, comparing the current temperature value of the phase change material of each first phase change energy storage heat exchanger; and selectively controlling the connection of the corresponding second circulation part with the supply device and the spray device respectively according to the current temperature value of each phase change material, from high to low.

[0020] Furthermore, a method for selectively controlling the connection of the corresponding second circulation parts with the supply device and the spray device respectively in sequence from high to low according to the current temperature value of each phase change material includes: when one of the second circulation parts in each second circulation part is connected to the supply device and the spray device respectively, obtaining the current temperature of the corresponding phase change material; when the current temperature of the corresponding phase change material is less than the first preset temperature value, controlling the second circulation part to be disconnected from the supply device and the spray device respectively; and controlling when another second circulation part in each second circulation part is connected to the supply device and the spray device respectively.

[0021] Furthermore, the control method also includes: after the defrost mode is running, detecting the current defrost state of the evaporator device; when any one of the second circulation parts is respectively connected to the supply device and the spray device, it is detected that the evaporator device has completed defrosting, and the defrost mode is switched to the refrigeration mode; when the second circulation parts are respectively disconnected from the supply device and the spray device, it is detected that the evaporator device has not completed defrosting, and the defrost mode is switched to the refrigeration mode; when switching to the refrigeration mode, when the current temperature of the phase change material corresponding to at least one of the second circulation parts is greater than or equal to the third preset temperature value, the refrigeration mode is switched to the defrost mode, and defrosting continues; wherein the third preset temperature value is greater than the first preset temperature value.

[0022] Furthermore, after the refrigeration mode is running, the method for judging whether to switch to the defrost mode includes: after the refrigeration mode is running, judging whether the evaporator device reaches the defrost condition; if the evaporator device reaches the defrost condition, obtaining the current temperature value of the phase change material of each first phase change energy storage heat exchanger; if the current temperature value of the phase change material of each first phase change energy storage heat exchanger is less than the first preset temperature value, maintaining the refrigeration mode; if the current temperature value of the phase change material of at least one first phase change energy storage heat exchanger among the first phase change energy storage heat exchangers is greater than the first preset temperature value, switching the refrigeration mode to the defrost mode.

[0023] Furthermore, if the evaporator device has two evaporators, the two evaporators are arranged in series; if the spray device has two sprayers, the two evaporators are arranged in one-to-one correspondence with the two sprayers, each sprayer is arranged above the corresponding evaporator, and each sprayer is respectively connected to the output end of each second flow part in a switchable manner; the control method also includes: when one of the two evaporators reaches the defrost condition and the refrigeration mode is switched to the defrost mode, the sprayer corresponding to the evaporator that reaches the defrost condition is connected to the output end of one of the second flow parts in each second flow part; when both evaporators reach the defrost condition and the refrigeration mode is switched to the defrost mode, the sprayers corresponding to the two evaporators are connected to the output end of one of the second flow parts in each second flow part in sequence.

[0024] Furthermore, if the refrigerant flowing out of the condenser flows to the first energy storage heat exchange device, the method of sequentially controlling the connection between each first circulation part and the condenser and evaporator device respectively includes: obtaining the current temperature value of the phase change material of each first phase change energy storage heat exchanger; and controlling the connection between the corresponding first circulation part and the condenser and evaporator device respectively from low to high according to the current temperature value of each phase change material.

[0025] Furthermore, if the method is to control the connection between the corresponding first flow parts and the condenser and evaporator devices respectively in sequence from low to high according to the current temperature value of each phase change material, the method includes: when one of the first flow parts is connected to the condenser and the evaporator device respectively, obtaining the current temperature of the corresponding phase change material; when the current temperature of the corresponding phase change material is greater than the second preset temperature value, controlling the first flow parts to be disconnected from the condenser and the evaporator device respectively; and controlling when another first flow part of each first flow part is connected to the condenser and the evaporator device respectively.

[0026] Furthermore, the control method is applied to the above-mentioned control system, and the control method also includes: in the refrigeration mode, obtaining the current temperature of the phase change material corresponding to each first flow part; after a preset time, comparing the current temperature of the phase change material corresponding to each first flow part; and according to the comparison result, controlling the fourth control valve corresponding to the phase change material whose current temperature is at the highest value to open.

[0027] Furthermore, if there are N fourth control valves and N≥3 first phase change energy storage devices, the control method also includes: when in the refrigeration mode, the current temperature value of the phase change material of each first phase change energy storage device is greater than the second preset temperature value, controlling the first flow part of one of the first phase change energy storage devices corresponding to each fourth control valve in the closed state to be connected to the condenser and evaporator devices respectively.

[0028] Furthermore, the control method is applied to the above-mentioned control system, and the control method also includes: after the cooling mode is turned on, obtaining the current outdoor temperature to determine whether the refrigerant flowing out of the condenser flows to the first energy storage heat exchange device according to the current outdoor temperature; if the current outdoor temperature is greater than or equal to the fourth preset temperature value, controlling the refrigerant flowing out of the condenser to flow to the first energy storage heat exchange device; if the current outdoor temperature is less than the fourth preset temperature value, controlling the refrigerant flowing out of the condenser to flow to the second energy storage heat exchange device.

[0029] Beneficial effects: Applying the technical solution of the present invention, the control system provided by the present invention includes: a condenser and an evaporator device connected in sequence, a supply device and a spray device connected thereto, and a first energy storage heat exchange device, wherein the condenser is used to exchange heat with the external environment to reduce the temperature of the refrigerant; the refrigerant after the temperature is reduced flows out from the output end of the condenser and flows to the evaporator device; the evaporator device is used to exchange heat with the target area, thereby reducing the temperature of the target area and achieving a refrigeration effect. At the same time, a first energy storage heat exchange device is provided between the condenser and the evaporator device, the first energy storage heat exchange device has at least two first phase change energy storage heat exchangers, each of which is arranged in parallel, each of which has a phase change material for absorbing and releasing heat, and at the same time, each of which also has a first circulation part for the circulation of the refrigerant and a second circulation part for the circulation of the defrosting liquid, and each of the first circulation parts is connected to the condenser and the evaporator in a disconnectable manner. In addition, the supply device is used to transport defrosting liquid to the spray device; the spray device is arranged above the evaporator device, and the spray device is used to spray and defrost the evaporator device, and each second circulation part is connected to the supply device and the spray device in a disconnectable manner. When the control system executes the refrigeration mode, each second circulation part is controlled to be disconnected from the supply device and the spray device respectively, so that the defrosting liquid does not enter each second circulation part, and at the same time, each first circulation part is controlled to be connected to the condenser and the evaporator device respectively, so that the refrigerant flowing out of the condenser flows into each first circulation part in turn and flows to the evaporator device. In this process, the phase change material of the first phase change energy storage heat exchanger absorbs the heat released by the refrigerant in the corresponding first circulation part in turn, thereby storing it. When the control system executes the defrost mode, each first circulation part is controlled to be disconnected from the condenser and the evaporator device respectively, so that the refrigerant no longer flows to the evaporator device. At the same time, according to the current temperature of the phase change material of each first phase change energy storage heat exchanger, each second circulation part is adaptively controlled to be connected with the supply device and the spray device respectively, so that the defrost liquid flowing out of the supply device can enter at least one second circulation part of each second circulation part in turn, so that the defrost liquid flowing into the second circulation part exchanges heat with the phase change material of the first phase change energy storage heat exchanger corresponding to the second circulation part, so that the defrost liquid absorbs the heat released by the phase change material, and the defrost liquid after absorbing the heat flows out of the second circulation part and flows to the spray device, so that the spray device sprays and defrosts the evaporator device. With such a structural setting, by setting the first energy storage heat exchange device, the refrigerant flowing out of the condenser can be secondary subcooled, and the temperature of the refrigerant can be further reduced, thereby improving the refrigeration effect, system refrigeration capacity and performance coefficient.And the first energy storage heat exchange device has at least two first phase change energy storage heat exchangers, and each first phase change energy storage heat exchanger has a phase change material with high specific heat capacity, a first circulation part for the circulation of refrigerant, and a second circulation part for the circulation of defrosting liquid. Then, in the refrigeration mode, the phase change materials of each first phase change energy storage heat exchanger can efficiently absorb and store the waste heat of the refrigerant in turn, thereby improving the energy efficiency and capacity utilization of the system, reducing energy waste, and reducing energy consumption and the operating cost of the system. At the same time, through the phase change material with high specific heat capacity in each first phase change energy storage heat exchanger, each first phase change energy storage heat exchanger can also store more heat in the refrigeration mode, thereby ensuring that there is enough heat for defrosting. And, the system ensures continuous and efficient heat supply in the defrost mode through the waste heat stored by the phase change material. At the same time, when the control system executes the defrost mode, the system adaptively controls the flow direction of the defrost liquid according to the current temperature of the phase change material of each first phase change energy storage heat exchanger, thereby ensuring that the defrost liquid can flow through the first phase change energy storage heat exchanger with higher heat storage first, so that the defrost liquid can absorb enough heat for defrosting, improve the efficiency and thoroughness of defrosting, and ensure the effective use of heat. In the defrost mode, the control system adaptively controls the flow direction of the defrost liquid according to the current temperature value of the phase change material in each first phase change energy storage heat exchanger, and also ensures that the heat can be released on demand and in an orderly manner, avoiding the problem of insufficient heat in the traditional system. In addition, the system also monitors the temperature of the phase change material in each first phase change energy storage heat exchanger in real time, and dynamically adjusts the flow direction of the defrost liquid to ensure flexible response to heat requirements under different conditions, especially when the condensation temperature is low and the frost layer is thick. This intelligent control mechanism realizes the continuous supply of heat in the defrost mode and the continuous secondary supercooling of the refrigerant in the refrigeration mode, ensuring the maximum energy utilization efficiency. By precisely controlling the storage and release of heat, the load fluctuation of the equipment under extreme conditions is reduced, the condenser, evaporator and other key components are protected, and the service life of the equipment is extended. This intelligent control mechanism also ensures the stable operation of the system, reduces failures caused by insufficient heat or incomplete defrosting, and improves the reliability and safety of the system. The control system of the present invention effectively solves the technical problem in the prior art that when the condensing temperature is low and the frost layer is thick, the heat stored in the heat exchanger may not meet the heat demand for defrosting, resulting in poor defrosting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of an embodiment of a control system of the present invention is shown; Figure 2 A schematic diagram of the structure of a control system without a second phase-change energy storage heat exchanger in an embodiment of the present invention is shown; Figure 3 A schematic diagram showing the structure of a refrigerant circulation circuit in an embodiment of a control system of the present invention is shown; Figure 4 A schematic structural diagram of a defrost liquid circulation loop in an embodiment of a control system of the present invention is shown; Figure 5 A schematic flow chart of an embodiment of the control method of the present invention is shown.

[0031] The above drawings include the following reference numerals: 1. Condenser; 2. Evaporator device; 21. Evaporator; 3. Supply device; 31. Water tray; 311. Water leakage hole; 32. Water pump; 33. Water supply pipeline; 4. Spraying device; 41. Sprayer; 5. First energy storage heat exchange device; 51. First phase change energy storage heat exchanger; 511. First circulation part; 512. Second circulation part; 6. First control valve; 7. Second control valve; 8. Third control valve; 9. Fourth control valve; 10. Filter device; 11. Fifth control valve; 12. First temperature detection device; 13. Second energy storage heat exchange device; 131. Second phase change energy storage heat exchanger; 1311. Third circulation part; 1322. Fourth circulation part; 14. Sixth control valve; 15. Seventh control valve; 16. Eighth control valve; 17. Ninth control valve; 18. Second temperature detection device; 19. Compressor; 20. Throttling device. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0033] See also Figures 1 to 4As shown, according to an embodiment of the present invention, the present invention provides a control system, comprising: a condenser 1 and an evaporator device 2 connected in sequence; a supply device 3 and a spray device 4 connected thereto, the supply device 3 being used to convey defrosting liquid to the spray device 4; the spray device 4 being arranged above the evaporator device 2, the spray device 4 being used to spray and defrost the evaporator device 2; a first energy storage heat exchange device 5 for heat exchange and heat storage; the first energy storage heat exchange device 5 has at least two first phase-change energy storage heat exchangers 51, each of which is provided with a first circulation portion 511 for circulation of refrigerant and a second circulation portion 512 for circulation of defrosting liquid; each first circulation portion 511 is respectively connected to the condenser 1 and the evaporator 21 in a switchable manner, and each second The circulation part 512 is connected to the supply device 3 and the spray device 4 in a disconnectable manner; wherein, in the cooling mode, the connection of each first circulation part 511 with the condenser 1 and the evaporator device 2 is controlled in turn, so that the phase change material of each first phase change energy storage heat exchanger 51 absorbs the heat released by the refrigerant flowing into the corresponding first circulation part 511 in turn and stores it, and each second circulation part 512 is controlled to be disconnected from the supply device 3 and the spray device 4 respectively; in the defrosting mode, each first circulation part 511 is controlled to be disconnected from the condenser 1 and the evaporator device 2 respectively, and according to the current temperature of the phase change material of each first phase change energy storage heat exchanger 51, the connection of each second circulation part 512 with the supply device 3 and the spray device 4 is adaptively controlled.

[0034] It can be seen that the control system provided by the present invention includes: a condenser 1 and an evaporator device 2 connected in sequence, a supply device 3 and a spray device 4 connected thereto, and a first energy storage heat exchange device 5. The condenser 1 is used to perform heat exchange with the external environment to reduce the temperature of the refrigerant; the refrigerant after the temperature is reduced flows out from the output end of the condenser and flows to the evaporator device 2; the evaporator device 2 is used to perform heat exchange with the target area, thereby reducing the temperature of the target area to achieve the cooling effect. At the same time, a first energy storage heat exchange device 5 is provided between the condenser 1 and the evaporator device 2. The first energy storage heat exchange device 5 has at least two first phase-change energy storage heat exchangers 51, each of which is arranged in parallel, and each of which has a phase-change material for absorbing and releasing heat. At the same time, each of the first phase-change energy storage heat exchangers 51 also has a first circulation part 511 for the circulation of the refrigerant and a second circulation part 512 for the circulation of the defrosting liquid. Each of the first circulation parts 511 is connected to the condenser 1 and the evaporator 21 in a disconnectable manner. In addition, the supply device 3 is used to deliver defrosting liquid to the spray device 4; the spray device 4 is arranged above the evaporator device 2, and the spray device 4 is used to spray and defrost the evaporator device 2, and each second circulation part 512 is connected to the supply device 3 and the spray device 4 in a disconnectable manner. When the control system executes the refrigeration mode, each second circulation part 512 is controlled to be disconnected from the supply device 3 and the spray device 4, so that the defrosting liquid does not enter each second circulation part 512, and at the same time, each first circulation part 511 is controlled to be connected to the condenser 1 and the evaporator device 2 respectively, so that the refrigerant flowing out of the condenser 1 flows into each first circulation part 511 in turn, and flows to the evaporator device 2. In this process, the phase change material of the first phase change energy storage heat exchanger 51 absorbs the heat released by the refrigerant in the corresponding first circulation part 511 in turn, so as to store it. When the control system executes the defrost mode, each first circulation part 511 is controlled to be disconnected from the condenser 1 and the evaporator device 2 respectively, so that the refrigerant no longer flows to the evaporator device 2. At the same time, according to the current temperature of the phase change material of each first phase change energy storage heat exchanger 51, the connection between each second circulation part 512 and the supply device 3 and the spray device 4 is adaptively controlled, so that the defrost liquid flowing out of the supply device 3 can enter at least one of the second circulation parts 512 in turn, so that the defrost liquid flowing into the second circulation part 512 exchanges heat with the phase change material of the first phase change energy storage heat exchanger 51 corresponding to the second circulation part, so that the defrost liquid absorbs the heat released by the phase change material, and the defrost liquid after absorbing the heat flows out of the second circulation part 512 and flows to the spray device 4, so that the spray device 4 sprays and defrosts the evaporator device 2.

[0035] With such a structural setting, by setting the first energy storage heat exchange device 5, the refrigerant flowing out of the condenser 1 can be subcooled for a second time, and the temperature of the refrigerant can be further reduced, thereby improving the refrigeration effect, the system refrigeration capacity and the coefficient of performance. In addition, the first energy storage heat exchange device 5 has at least two first phase change energy storage heat exchangers 51, and each first phase change energy storage heat exchanger 51 has a phase change material with a high specific heat capacity, a first circulation part 511 for the circulation of the refrigerant, and a second circulation part 512 for the circulation of the defrosting liquid. In the refrigeration mode, the phase change materials of each first phase change energy storage heat exchanger 51 can efficiently absorb and store the waste heat of the refrigerant in turn, thereby improving the energy efficiency and capacity utilization of the system, reducing energy waste, and reducing energy consumption and the operating cost of the system. At the same time, through the phase change material with a high specific heat capacity in each first phase change energy storage heat exchanger 51, each first phase change energy storage heat exchanger 51 can also store more heat in the refrigeration mode, thereby ensuring that there is enough heat to be used for defrosting. Furthermore, the system ensures continuous and efficient heat supply in the defrost mode through the waste heat stored in the phase change material. At the same time, when the control system executes the defrost mode, the system adaptively controls the flow direction of the defrost liquid according to the current temperature of the phase change material of each first phase change energy storage heat exchanger 51, thereby ensuring that the defrost liquid can preferentially flow through the first phase change energy storage heat exchanger 51 with higher stored heat, so that the defrost liquid can absorb enough heat for defrosting, thereby improving the efficiency and thoroughness of defrosting, and ensuring the effective use of heat. In the defrost mode, the control system adaptively controls the flow direction of the defrost liquid according to the current temperature value of the phase change material in each first phase change energy storage heat exchanger 51, and also ensures that the heat can be released on demand and in an orderly manner, avoiding the problem of insufficient heat in the traditional system. In addition, the system also monitors the temperature of the phase change material in each first phase change energy storage heat exchanger 51 in real time, and dynamically adjusts the flow direction of the defrost liquid to ensure flexible response to heat requirements under different conditions, especially when the condensation temperature is low and the frost layer is thick. This intelligent control mechanism realizes the continuous supply of heat in the defrost mode and the continuous secondary supercooling of the refrigerant in the refrigeration mode, ensuring the maximum energy utilization efficiency. By precisely controlling the storage and release of heat, the load fluctuation of the equipment under extreme conditions is reduced, the condenser, evaporator and other key components are protected, and the service life of the equipment is extended. And this intelligent control mechanism also ensures the stable operation of the system, reduces failures caused by insufficient heat or incomplete defrosting, and improves the reliability and safety of the system. The control system of the present invention effectively solves the technical problem in the prior art that when the condensation temperature is low and the frost layer is thick, the heat stored in the heat exchanger may not meet the heat demand for defrosting, resulting in poor defrosting effect.

[0036] Optionally, the refrigerant is a refrigerant and the defrost liquid is defrost water.

[0037] Further, the input end of the first circulation part 511 is connected to the output end of the condenser 1 in an on-off manner, and the output end of the first circulation part 511 is connected to the input end of the evaporator device 2 in an on-off manner. The input end of the second circulation part 512 is connected to the output end of the supply device 3 in an on-off manner, and the output end of the second circulation part 512 is connected to the spray device 4 in an on-off manner.

[0038] Further, the first circulation part 511 includes a plurality of first circulation branches arranged in parallel, the input end of each first circulation branch forms the input end of the first circulation part 511, and the output end of each first circulation branch forms the output end of the first circulation part 511. In the cooling mode, when the refrigerant flows into the first phase-change energy storage heat exchanger 51, it flows into each first circulation branch respectively, and then flows out through the output end of each first circulation branch and merges to flow to the evaporator device 2. With such a structural setting, by setting a plurality of parallel first circulation branches, the refrigerant can transfer more heat to the phase change material in a shorter time, thereby improving the heat absorption speed and total amount of the phase change material. This efficient heat absorption process ensures that the phase change material can store more heat in the cooling mode, providing sufficient heat reserve for subsequent defrosting operations. In addition, the design of the parallel branches increases the contact area between the refrigerant and the phase change material, making the heat exchange more sufficient and uniform, and increases the contact area between the refrigerant and the phase change material, making the heat exchange more sufficient and uniform. Thereby improving the heat exchange efficiency between the refrigerant and the phase change material.

[0039] Optionally, the first circulation portion 511 includes three first circulation branches arranged in parallel.

[0040] Further, the second circulation part 512 includes a plurality of second circulation branches arranged in parallel, and the input end of each second circulation branch forms the input end of the second circulation part 512. The output end of each second circulation branch forms the output end of the second circulation part 512. In the defrost mode, when the defrost liquid flows into the first phase-change energy storage heat exchanger 51, it flows into each second circulation branch respectively, and then flows out through the output end of each second circulation branch and flows to the spray device after merging. With such a structural setting, by setting a plurality of parallel second circulation branches, the contact area between the defrost liquid and the phase change material is increased, so that the heat exchange is more sufficient and uniform. As a result, more heat can be transferred from the phase change material to the defrost liquid in a shorter time, thereby improving the overall heat exchange efficiency. In addition, the design of the parallel branches can avoid the problem of local temperature unevenness that may occur in a single channel, ensuring that the temperature distribution of the defrost liquid in the entire heat exchanger is more uniform, thereby improving the defrosting effect. In addition, the defrost liquid flows into the first phase-change energy storage heat exchanger 51 through multiple parallel branches, and can absorb a large amount of stored heat in a short time, ensuring that the defrost liquid obtains sufficient energy for defrosting. This efficient heat absorption process ensures that the defrost liquid is fully heated before entering the spray device, thereby improving the effect of spray defrosting.

[0041] Furthermore, the control system also includes: a compressor 19, which is arranged between the input end of the condenser 1 and the output end of the evaporator device 2, the exhaust port of the compressor 19 is connected to the input end of the condenser 1, and the intake port of the compressor 19 is connected to the output end of the evaporator device 2.

[0042] Furthermore, the control device also includes: a throttling device 20, which is arranged between the input end of the evaporator device 2 and the output end of each first flow part 511, one end of the throttling device 20 is connected to the input end of the evaporator device 2, and the other end of the throttling device 20 is respectively connected to the output end of each first flow part 511 in a switchable manner; the output end of each first flow part 511 is connected to the evaporator device 2 in a switchable manner through the throttling device 20.

[0043] Furthermore, if Figures 1 to 3 As shown, the compressor 19, the condenser 1, the first flow parts 511, the throttling device 20 and the evaporator device 2 form a refrigerant circulation circuit. When in the defrosting mode, the compressor 19 is in a standby state and does not work.

[0044] Furthermore, at least part of the supply device 3 is used to collect and recover the defrost liquid flowing down from the evaporator device 2 .

[0045] Furthermore, if Figure 1 , Figure 2 and Figure 4As shown, the supply device 3, each second flow portion 512 and the spray device 4 form a defrost liquid circulation loop.

[0046] Specifically, the control system also includes: a control device, which is used to determine whether to switch from the refrigeration mode to the defrost mode and obtain the current temperature of the phase change material of each first phase change energy storage heat exchanger 51, and adaptively control the connection and disconnection of each first circulation part 511 with the condenser 1 and the evaporator device 2, and the connection and disconnection of each second circulation part 512 with the supply device 3 and the spray device 4, respectively, according to the judgment result and the current temperature of each phase change material. By setting the control device, the system can adaptively control the connection and disconnection of each first circulation part 511 with the condenser 1 and the evaporator device 2, and the connection and disconnection of each second circulation part 512 with the supply device 3 and the spray device 4, according to the current state and the temperature of each phase change material. This intelligent control significantly reduces the need for manual intervention and improves the automation level and operation efficiency of the system. At the same time, the flexibility of the system has also been enhanced, ensuring that it is always in the best operating state and can effectively cope with various complex working conditions, thereby improving stability and reliability. In summary, by introducing the control device, the system realizes intelligent mode switching, precise temperature monitoring and adaptive control, which significantly improves the energy utilization efficiency, defrosting effect and the overall stability of the system.

[0047] Specifically, Figures 1 to 3 As shown, the control system also includes: at least two first control valves 6 and second control valves 7, each first control valve 6 is arranged in a one-to-one correspondence with each first phase change energy storage heat exchanger 51, each first control valve 6 is respectively connected to the input end of the corresponding first circulation part 511 and the output end of the condenser 1; each first control valve 6 is used to control the connection and disconnection between the corresponding first circulation part 511 and the condenser 1; the input end of the second control valve 7 is respectively connected to the output end of each first circulation part 511, and the output end of the second control valve 7 is connected to the input end of the evaporator device 2; the second control valve 7 is used to control the connection and disconnection between each first circulation part 511 and the evaporator device 2. With such a structural setting, by setting the first control valve 6 between each first circulation part 511 and the condenser 1, the system can realize that the refrigerant enters each first circulation part 511 in turn, thereby accurately controlling the flow path of the refrigerant, optimizing the heat exchange efficiency, and improving the overall thermal management performance. At the same time, by setting the second control valve 7, the system can quickly adjust the flow between the evaporator device 2. This instant response capability enables the system to quickly adjust its working state when the load changes, thereby improving the overall response speed.

[0048] Furthermore, each of the first control valves 6 and the second control valves 7 is connected to a control device, which adaptively controls the opening and closing of each of the first control valves 6 and the second control valves 7 according to the operating mode of the system and the current temperature of the phase change material of each first phase change energy storage heat exchanger 51.

[0049] Optionally, in the cooling mode, the second control valve 7 is controlled to open, and the current temperature of the phase change material of each first phase change energy storage heat exchanger 51 is obtained. According to the current temperature of the phase change material of each first phase change energy storage heat exchanger 51, the corresponding first control valve 6 is controlled to open in sequence from low to high. When the first control valve 6 corresponding to the first phase change energy storage heat exchanger 51 whose current temperature of the phase change material is the lowest is controlled to open, the first flow portion 511 of the first phase change energy storage heat exchanger 51 is respectively connected to the condenser 1 and the evaporator device 2, and the phase change material of the first phase change energy storage heat exchanger 51 absorbs and stores the heat released by the refrigerant. When the phase change material of the first phase change energy storage heat exchanger 51 is completely melted (that is, when the heat absorption is completed), the first control valve 6 corresponding to the first phase change energy storage heat exchanger 51 is controlled to close. Then the first control valve 6 corresponding to the first phase change energy storage heat exchanger 51 whose current temperature of the phase change material is the second lowest is controlled to open. Then, the same applies. When switching from the cooling mode to the defrosting mode, the first control valve 6 and the second control valve 7 are controlled to be in a closed state.

[0050] Among them, when the current temperatures of the phase change materials of each first phase change energy storage heat exchanger 51 are consistent, the opening and closing of the first control valve 6 are controlled in sequence according to the installation position or preset designation or coding of each first phase change energy storage heat exchanger 51.

[0051] Specifically, Figure 1 , Figure 2 and Figure 4As shown, the control system also includes: a third control valve 8 and at least two fourth control valves 9, the input end of the third control valve 8 is connected to the output end of the supply device 3, and the output end of the third control valve 8 is respectively connected to the input end of each second circulation part 512; the third control valve 8 is used to control the on-off between the supply device 3 and the input end of each second circulation part 512; each fourth control valve 9 is arranged one-to-one with each first phase change energy storage heat exchanger 51, each fourth control valve 9 is respectively arranged between the third control valve 8 and the input end of the corresponding second circulation part 512, and each fourth control valve 9 is respectively connected to the input end of the corresponding second circulation part 512 and the output end of the third control valve 8. With such a structural arrangement, by setting the third control valve 8, the system can quickly adjust the flow between the supply device 3. This instant response capability enables the system to quickly adjust the working state when the load changes, thereby improving the overall response speed. At the same time, by setting the fourth control valve 9 between each second circulation part 512 and the fourth control valve 9, the system can realize that the refrigerant enters each second circulation part 512 in sequence, accurately control the flow path of the defrost liquid, optimize the heat exchange efficiency, and improve the overall thermal management performance. In addition, a main valve (i.e., the third control valve 8) and a sub-valve (i.e., the fourth control valve 9) are set at the output end of each second circulation part 512, which can effectively prevent the defrost liquid from entering the second circulation part 512 in the refrigeration mode.

[0052] Furthermore, the third control valve 8 and each fourth control valve 9 are connected to a control device, which adaptively controls the opening and closing of the third control valve 8 and each fourth control valve 9 according to the operating mode of the system and the current temperature of the phase change material of each first phase change energy storage heat exchanger 51.

[0053] Optionally, in the cooling mode, the third control valve 8 and each fourth control valve 9 are controlled to be in a closed state, and the phase change material of each first phase change energy storage heat exchanger 51 is detected in real time to see whether it is completely melted.

[0054] When the phase change material of only one first phase change energy storage heat exchanger 51 among the first phase change energy storage heat exchangers 51 is completely melted, the first phase change energy storage heat exchanger 51 is selected as the defrosting energy storage unit, and the fourth control valve 9 of the first phase change energy storage heat exchanger 51 is controlled to open.

[0055] When the phase change materials of at least two of the first phase change energy storage heat exchangers 51 are completely melted, the temperature of the phase change materials of at least two first phase change energy storage heat exchangers 51 is determined, and the first phase change energy storage heat exchanger 51 corresponding to the phase change material with the highest temperature is selected as the defrosting energy storage unit, and the fourth control valve 9 of the first phase change energy storage heat exchanger 51 is controlled to open. The other fourth control valves 9 are in a closed state.

[0056] It can be understood that when the phase change material of the first phase change energy storage heat exchanger 51 in each first phase change energy storage heat exchanger 51 is completely melted, the first phase change energy storage heat exchanger 51 is first selected as the defrost energy storage unit. After a period of time, when the phase change material of the second first phase change energy storage heat exchanger 51 in each first phase change energy storage heat exchanger 51 is completely melted, the temperature of the phase change materials of the two first phase change energy storage heat exchangers 51 is judged, and the first phase change energy storage heat exchanger 51 corresponding to the phase change material with the highest temperature is selected as the defrost energy storage unit. Whichever first phase change energy storage heat exchanger 51 is selected as the defrost energy storage unit, the corresponding fourth control valve 9 is in an open state.

[0057] Among them, if in the refrigeration mode, the phase change materials of each first phase change energy storage heat exchanger 51 are completely melted, the first control valve 6 corresponding to the first phase change energy storage heat exchanger 51 adjacent to the first phase change energy storage heat exchanger 51 selected as the defrost energy storage unit is controlled to open, thereby facilitating the circulation of the refrigerant.

[0058] For example, Figure 2 As shown, each first phase-change energy storage heat exchanger 51 is arranged in sequence from top to bottom. In the cooling mode, when the phase-change materials of each first phase-change energy storage heat exchanger 51 are completely melted, the first control valve 6 corresponding to the first phase-change energy storage heat exchanger 51 on the lower side of the first phase-change energy storage heat exchanger 51 selected as the defrosting energy storage unit is controlled to open. If the first phase-change energy storage heat exchanger 51 selected as the defrosting energy storage unit is the lowest part, the first control valve 6 corresponding to the first phase-change energy storage heat exchanger 51 on the uppermost side is opened.

[0059] When switching from the refrigeration mode to the defrost mode, the third control valve 8 is controlled to open, so that the defrost liquid flowing out of the supply device 3 passes through the third control valve 8 and the fourth control valve 9 in the open state in sequence and flows into the second flow part 512 of the first phase change energy storage heat exchanger 51 corresponding to the fourth control valve 9 in the open state, to absorb the heat released by the phase change material of the first phase change energy storage heat exchanger 51. The defrost liquid after absorbing the heat flows to the spray device 4, so that the spray device 4 performs spray defrosting.

[0060] When the phase change material of the released heat has completed heat release (that is, when the phase change material becomes solid), the fourth control valve 9 in the open state is controlled to switch to the closed state, and then the corresponding fourth control valves 9 are opened in sequence from high to low according to the current temperature of the phase change materials of the other first phase change energy storage heat exchangers 51. One fourth control valve 9 is opened, and the other fourth control valves 9 are all in the closed state. Among them, in the defrosting state, if it is detected that the defrosting has been completed, the third control valve 8 and each fourth control valve 9 are controlled to be in the closed state, and switched to the cooling mode.

[0061] Among them, in the defrost mode, if the phase change materials of each first phase change energy storage heat exchanger 51 have released all the heat and it is detected that the defrost is not completed, the third control valve 8 and each fourth control valve 9 are controlled to be in a closed state and switched to the refrigeration mode.

[0062] Specifically, Figure 1 As shown, the control system further includes: a filter device 10, which is arranged between the supply device 3 and the first energy storage heat exchange device 5, and is respectively connected to the input end of the supply device 3 and the input end of each second circulation part 512; the filter device 10 is used to filter the defrost liquid. With such a structural arrangement, the defrost liquid can be filtered by arranging the filter device 10 to prevent impurities from clogging each control valve, each second circulation part 512 of the first energy storage heat exchange device 5 and the spray device 4, thereby reducing the defrosting effect.

[0063] Specifically, Figure 1 , Figure 2 and Figure 4 As shown, the evaporator device 2 includes: at least one evaporator 21, the input end of the evaporator 21 is connected to the output end of each first circulation part 511 in a disconnectable manner; the supply device 3 includes: at least one water receiving tray 31, the water receiving tray 31 is arranged in a one-to-one correspondence with the evaporator 21, the water receiving tray 31 is arranged below the corresponding evaporator 21, and the water receiving tray 31 is used to collect the defrost liquid flowing down from the evaporator 21 and store it; the output end of the water receiving tray 31 is respectively connected to the input end of each second circulation part 512 in a disconnectable manner. With such a structural arrangement, each evaporator 21 is arranged in a one-to-one correspondence with its corresponding water receiving tray 31, ensuring that the defrost liquid can be accurately collected and redistributed. This one-to-one design improves the accuracy and reliability of the system and avoids waste and uneven distribution of the defrost liquid. By setting the water receiving tray 31, and the water receiving tray 31 is arranged below the evaporator 21, the melted frost water can be effectively collected to prevent water from dripping or accumulating and affecting the operation of the system. The water receiving pan 31 is not only used to collect the defrost liquid flowing down from the evaporator 21, but also can store the liquid for reuse when needed. This design ensures the effective reuse of the defrost liquid, reduces the demand for additional defrost liquid, and improves the overall energy efficiency of the system.

[0064] Alternatively, if Figure 1 As shown, there are two evaporators 21, and the two evaporators 21 are arranged in series, and the input end of the evaporator 21 close to the output end of each first circulation part 511 forms the input end of the evaporator device 2. A water receiving tray 31 is provided under each evaporator 21. Each water receiving tray 31 collects and stores the defrost liquid flowing from the corresponding evaporator 21. In actual process, the number of evaporators 21 is not limited. By setting multiple evaporators 21, it can be applied to cold storages with multiple temperature zones.

[0065] Specifically, Figure 1 , Figure 2 and Figure 4 As shown, the supply device 3 also includes: at least one water pump 32, the water pump 32 is arranged in a one-to-one correspondence with the water receiving tray 31, the input end of the water pump 32 is connected to the output end of the corresponding water receiving tray 31, and the output end of the water pump 32 is respectively connected to the input end of each second circulation part 512 in a switchable manner. With such a structural arrangement, by arranging the water pump 32, and the water pump 32 is arranged in a one-to-one correspondence with the water receiving tray 31, it is ensured that the defrost liquid in the corresponding water receiving tray 31 can be transported from the water receiving tray 31 to the corresponding second circulation part 512 as needed, and the flow rate of the defrost liquid can also be accurately controlled by the water pump 32.

[0066] Furthermore, the water pump 32 is connected to a control device, and the control device is used to control the start and stop of the water pump.

[0067] Alternatively, if Figure 1 As shown, there are two water pumps 32 , and the two water pumps 32 are arranged in a one-to-one correspondence with the two water receiving trays 31 . The output ends of the two water pumps 32 are respectively connected to the input ends of each second circulation part 512 in a disconnectable manner.

[0068] Furthermore, if Figure 1 As shown, a water leakage hole 311 is provided on the water receiving tray 31 , and the water leakage hole 311 forms an output end of the water receiving tray 31 .

[0069] Specifically, Figure 1 , Figure 2 and Figure 4 As shown, the supply device 3 further includes: a water supply pipeline 33, the water supply pipeline 33 is connected to the water receiving tray 31, and the water supply pipeline 33 is used to replenish the defrost liquid to the water receiving tray 31. With such a structural arrangement, the water supply pipeline 33 can be used to replenish the defrost liquid to the water receiving tray 31 to prevent the defrost liquid in the water receiving tray 31 from being too low.

[0070] Optionally, there are multiple water receiving trays 31 , and the output ends of the water replenishment pipeline 33 are respectively connected to each water receiving tray 31 .

[0071] Specifically, Figure 1 , Figure 2 and Figure 4As shown, the spray device 4 includes: at least one sprayer 41, the sprayer 41 is arranged in a one-to-one correspondence with the evaporator 21, the sprayer 41 is arranged above the corresponding evaporator 21, and the sprayer 41 is used to spray the defrosting liquid onto the corresponding evaporator 21 for defrosting; the input end of the sprayer 41 is connected to the output end of each second circulation part 512 in an on-off manner. With such a structural arrangement, each sprayer 41 is arranged in a one-to-one correspondence with the corresponding evaporator 21, ensuring that the defrosting liquid can be accurately sprayed onto the surface of the evaporator that needs to be defrosted. Thereby improving the accuracy and efficiency of the spraying, avoiding the waste and uneven distribution of the defrosting liquid. The sprayer 41 is arranged above the evaporator 21, which can ensure that the defrosting liquid evenly covers the entire evaporator surface and improves the defrosting effect. It ensures that all frost layers can be effectively melted, which improves the thoroughness of defrosting. In addition, the connection state of each sprayer 41 and the second circulation part 512 is selectively controlled according to actual needs to ensure that the defrosting liquid is distributed to the corresponding evaporator 21 as needed. Thereby improving the defrosting efficiency.

[0072] Optionally, the water tray 31 and the water pump 32 are arranged in a one-to-one correspondence with the sprayer 41. Figure 1 As shown, there are two sprayers 41 . When one of the two sprayers 41 is controlled to perform spray defrosting, the corresponding water pump 32 is turned on, and the water pump 32 transports the defrosting liquid in the corresponding water receiving tray 31 to the sprayer 41 .

[0073] Optionally, when at least two evaporators 21 among the plurality of evaporators 21 reach the defrosting condition, the second evaporator 21 is defrosted after the first evaporator 21 is defrosted.

[0074] Specifically, Figure 1 , Figure 2 and Figure 4 As shown, the control system further includes: at least one fifth control valve 11, which is arranged in one-to-one correspondence with the sprayer 41, and the fifth control valve 11 is respectively connected to the input end of the corresponding sprayer 41 and the output end of each second circulation part 512; the fifth control valve 11 is used to control the connection and disconnection between the output end of each second circulation part 512 and the corresponding sprayer 41. With such a structural arrangement, by arranging the fifth control valve 11, the flow direction of the defrost liquid can be independently controlled, ensuring that the defrost liquid can be accurately sprayed into the corresponding sprayer 41 of the evaporator 21 that needs to be defrosted, thereby improving the accuracy and efficiency of spraying, avoiding the waste and uneven distribution of the defrost liquid, and ensuring that each evaporator 21 can obtain enough defrost liquid for effective defrosting.

[0075] Specifically, Figures 1 to 4As shown, each first phase-change energy storage heat exchanger 51 is provided with a first temperature detection device 12, and the first temperature detection device 12 on each first phase-change energy storage heat exchanger 51 is used to detect the temperature of the phase change material of the corresponding first phase-change energy storage heat exchanger 51; wherein each first temperature detection device 12 is connected to the control device, and each first temperature detection device 12 sends the detected temperature of the phase change material of the corresponding first phase-change energy storage heat exchanger 51 to the control device. With such a result setting, by setting the first temperature detection device 12, the temperature of the phase change material of the corresponding first phase-change energy storage heat exchanger 51 can be detected, so that the control device can judge the state of the phase change material of the corresponding first phase-change energy storage heat exchanger 51, so that the control device can perform corresponding control.

[0076] Furthermore, the first temperature detection device 12 includes at least one first temperature sensor.

[0077] Optionally, in addition to the first temperature detection device 12 on each first phase change energy storage heat exchanger 51, a capacitive sensor can also be provided on each first phase change energy storage heat exchanger 51 to detect the state of the phase change material of each first phase change energy storage heat exchanger 51 through the capacitive sensor, so as to judge whether the phase change material of each first phase change energy storage heat exchanger 51 is in a completely solidified state, a completely melted state or a solid-liquid mixed state.

[0078] Specifically, Figure 1As shown, the control system also includes: a second energy storage heat exchange device 13 and a control device for heat exchange and heat storage; the second energy storage heat exchange device 13 has at least two second phase change energy storage heat exchangers 131, and each second phase change energy storage heat exchanger 131 is provided with a third circulation part 1311 for refrigerant circulation and a fourth circulation part 1322 for defrost liquid circulation; each third circulation part 1311 is connected to the condenser 1 and the evaporator 21 in a switchable manner, and each fourth circulation part 1322 is connected to the supply device 3 and the spray device 4 in a switchable manner; the first energy storage heat exchange device 5 and the second energy storage heat exchange device 13 are arranged in parallel; the control device is used to obtain the current outdoor temperature, so as to selectively control the refrigerant and the defrost liquid to flow to the first energy storage heat exchange device 5 or the second energy storage heat exchange device 13 according to the current outdoor temperature. With such a structural setting, by setting the first energy storage heat exchange device 5 and the second energy storage heat exchange device 13, the control device selectively controls the refrigerant and defrost liquid to flow to the first energy storage heat exchange device 5 or the second energy storage heat exchange device 13 according to the current outdoor temperature. It can ensure that the outdoor temperature controls the flow direction of the refrigerant and defrost liquid, and then can use different phase change temperatures to effectively recover the waste heat of the condenser and ensure the best heat recovery effect. And by automatically switching between the first energy storage heat exchange device 5 and the second energy storage heat exchange device 13 according to the ambient temperature, load demand and phase change material temperature, the system can adapt to different seasons, ensuring that the system can effectively perform waste heat defrosting and refrigerant secondary supercooling in different environments, maximizing energy utilization efficiency.

[0079] Optionally, the phase change temperature range of the phase change material of the first energy storage heat exchange device 5 and the phase change temperature range of the phase change material of the second energy storage heat exchange device 13 are different, so that the system is an energy storage system using dual phase change materials, thereby adapting to the temperature of the refrigerant flowing out of the condenser 1 under different environments and optimizing the heat storage efficiency.

[0080] Furthermore, if Figure 1 As shown, the control system also includes: at least two sixth control valves 14 and a seventh control valve 15, each sixth control valve 14 is arranged in a one-to-one correspondence with each second phase-change energy storage heat exchanger 131, and each sixth control valve 14 is respectively connected to the input end of the corresponding third circulation part 1311 and the output end of the condenser 1; each sixth control valve 14 is used to control the connection and disconnection between the corresponding third circulation part 1311 and the condenser 1; the input end of the seventh control valve 15 is respectively connected to the output end of each third circulation part 1311, and the output end of the seventh control valve 15 is connected to the input end of the evaporator device 2; the seventh control valve 15 is used to control the connection and disconnection between each third circulation part 1311 and the evaporator device 2.

[0081] Optionally, in the cooling mode, when the refrigerant is controlled to flow to the first energy storage heat exchange device 5, each of the sixth control valves 14 and the seventh control valves 15 are controlled to be in a closed state. When the refrigerant is controlled to flow to the second energy storage heat exchange device 13, each of the first control valves 6 and the second control valves 7 are controlled to be in a closed state. As for the process of controlling each of the sixth control valves 14 and the seventh control valves 15, the process is the same as the process of controlling each of the first control valves 6 and the second control valves 7, which will not be described in detail here.

[0082] Furthermore, if Figure 1 As shown, the control system also includes: an eighth control valve 16 and at least two ninth control valves 17, the input end of the eighth control valve 16 is connected to the output end of the supply device 3, and the output end of the eighth control valve 16 is respectively connected to the input end of each fourth circulation part 1322; the eighth control valve 16 is used to control the on-off between the supply device 3 and the input end of each fourth circulation part 1322; each ninth control valve 17 is arranged in a one-to-one correspondence with each second phase change energy storage heat exchanger 131, and each ninth control valve 17 is respectively arranged between the eighth control valve 16 and the input end of the corresponding fourth circulation part 1322, and each ninth control valve 17 is respectively connected to the input end of the corresponding fourth circulation part 1322 and the output end of the eighth control valve 16.

[0083] Furthermore, the control system also includes: each second phase change energy storage heat exchanger 131 is provided with a second temperature detection device 18, and the second temperature detection device 18 on each second phase change energy storage heat exchanger 131 is used to detect the temperature of the phase change material of the corresponding second phase change energy storage heat exchanger 131; wherein each second temperature detection device 18 is connected to the control device, and each second temperature detection device 18 sends the detected temperature of the phase change material of the corresponding second phase change energy storage heat exchanger 131 to the control device.

[0084] Optionally, in the defrost mode, when the defrost liquid is controlled to flow to the first energy storage heat exchange device 5, the eighth control valve 16 and each ninth control valve 17 are controlled to be in a closed state. When the defrost liquid is controlled to flow to the second energy storage heat exchange device 13, the third control valve 8 and each fourth control valve 9 are controlled to be in a closed state. As for the process of controlling the eighth control valve 16 and each ninth control valve 17, the process is the same as the process of controlling each third control valve 8 and each fourth control valve 9, which will not be repeated here.

[0085] Optionally, the volumes of phase change materials stored in each first phase change energy storage heat exchanger 51 may be different or the same; and the volumes of phase change materials stored in each second phase change energy storage heat exchanger 131 may be different or the same.

[0086] Optionally, before matching the phase change energy storage heat exchanger, experimental test data can be used to optimize the design of the volume and number of a single phase change energy storage heat exchanger according to the defrosting frequency and the refrigerant temperature at the condenser outlet, so as to avoid such extreme situations as possible (i.e., each phase change energy storage heat exchanger has been completely melted but there is no need to defrost, or each phase change energy storage heat exchanger has been completely solidified but defrosting is not yet complete).

[0087] The present invention provides a refrigeration device, comprising: the control system of the above embodiment. With such a structural arrangement, the beneficial effects of the refrigeration device are the same as those of the control system of the above embodiment, which will not be described in detail here.

[0088] Optionally, the refrigeration equipment is a cold storage.

[0089] The present invention provides a control method, which is applied to the control system of the above embodiment. Figure 5 As shown, the control method includes: S11, after the cooling mode is running, the flow path of the refrigerant is controlled, and it is determined whether to switch to the defrosting mode.

[0090] S12, if the refrigerant flowing out of the condenser 1 is controlled to flow to the first energy storage heat exchange device 5, the connection between each first circulation part 511 and the condenser 1 and the evaporator device 2 is controlled in turn, so that the phase change material of each first phase change energy storage heat exchanger 51 absorbs the heat released by the refrigerant flowing into the corresponding first circulation part 511 in turn and stores it.

[0091] S13, if the refrigeration mode is switched to the defrosting mode, the current temperature value of the phase change material of each first phase change energy storage heat exchanger 51 is obtained.

[0092] S14, according to the current temperature value of the phase change material of each first phase change energy storage heat exchanger 51, adaptively controls the connection between each second circulation part 512 and the supply device 3 and the spray device 4 respectively, so that the defrost liquid flowing into at least one of the second circulation parts 512 absorbs the heat released by the corresponding phase change material, and the defrost liquid after absorbing the heat flows to the spray device 4.

[0093] By adopting such a control method, by sequentially controlling the connection of each first circulation part 511 with the condenser 1 and the evaporator device 2 respectively, in the refrigeration mode, the phase change materials of each first phase change energy storage heat exchanger 51 can be sequentially and efficiently absorbed and stored in the waste heat of the refrigerant, thereby improving the energy efficiency and capacity utilization of the system, reducing energy waste, and reducing energy consumption and the operating cost of the system. At the same time, each first phase change energy storage heat exchanger 51 can also store more heat in the refrigeration mode, thereby ensuring that there is enough heat for defrosting. In addition, the waste heat stored by the phase change material in the system ensures a continuous and efficient heat supply in the defrost mode. In addition, by absorbing the heat released by the refrigerant through the phase change material of each first phase change energy storage heat exchanger 51, the refrigerant flowing out of the condenser 1 can also be subcooled for a second time, further reducing the temperature of the refrigerant, thereby improving the refrigeration effect, the system refrigeration capacity and the coefficient of performance. At the same time, in the defrost mode, the system adaptively controls the flow direction of the defrost liquid according to the current temperature of the phase change material of each first phase change energy storage heat exchanger 51, thereby ensuring that the defrost liquid can preferentially flow through the second circulation part 512 of the first phase change energy storage heat exchanger 51 with higher heat storage, so that the defrost liquid can absorb enough heat for defrosting, thereby improving the efficiency and thoroughness of defrosting, and ensuring the effective use of heat. In the defrost mode, the control system adaptively controls the flow direction of the defrost liquid according to the current temperature value of the phase change material in each first phase change energy storage heat exchanger 51, and also ensures that the heat can be released on demand and in an orderly manner, avoiding the problem of insufficient heat in the traditional system. In addition, by real-time monitoring the temperature of the phase change material in each first phase change energy storage heat exchanger 51, the flow direction of the defrost liquid can be dynamically adjusted, thereby ensuring flexible response to heat requirements under different conditions, especially when the condensation temperature is low and the frost layer is thick. This intelligent control mechanism realizes the continuous supply of heat in the defrost mode and the continuous secondary supercooling of the refrigerant in the refrigeration mode, ensuring the maximum energy utilization efficiency. By precisely controlling the storage and release of heat, the load fluctuation of the equipment under extreme conditions is reduced, the condenser, evaporator and other key components are protected, and the service life of the equipment is extended. This intelligent control mechanism also ensures the stable operation of the system, reduces failures caused by insufficient heat or incomplete defrosting, and improves the reliability and safety of the system. The control method of the present invention effectively solves the technical problem in the prior art that when the condensing temperature is low and the frost layer is thick, the heat stored in the heat exchanger may not meet the heat demand for defrosting, resulting in poor defrosting effect.

[0094] Specifically, if the refrigeration mode is switched to the defrost mode, and according to the current temperature value of the phase change material of each first phase change energy storage heat exchanger 51, the method of adaptively controlling the connection of each second circulation part 512 with the supply device 3 and the spray device 4 respectively includes: if the refrigeration mode is switched to the defrost mode, comparing the current temperature value of the phase change material of each first phase change energy storage heat exchanger 51; selectively controlling the connection of the corresponding second circulation part 512 with the supply device 3 and the spray device 4 respectively from high to low according to the current temperature value of each phase change material. By adopting such a control method, the connection of the corresponding second circulation part 512 with the supply device 3 and the spray device 4 is selectively controlled from high to low according to the current temperature value of each phase change material, ensuring that the defrosting liquid can absorb enough heat. This method of allocating heat on demand avoids energy waste and improves the energy utilization rate of the system. And by gradually extracting heat from the phase change material with the highest temperature, the system can extract the most heat in the shortest time, ensuring that the defrosting liquid obtains enough heat to melt the frost layer, making its defrosting process fast and thorough, thereby improving the defrosting effect. In addition, the control system can dynamically adjust the on / off state of each second circulation part 512 according to the real-time temperature data to ensure that the best defrosting effect can be provided under any conditions.

[0095] Optionally, in the cooling mode, when one of the first circulation parts 511 is respectively connected to the condenser 1 and the evaporator device 2, the other first circulation parts 511 are disconnected from the condenser 1. In the defrosting mode, when one of the second circulation parts 512 is respectively connected to the spray device 4 and the supply device 3, the other second circulation parts 512 are disconnected from the supply device 3.

[0096] Specifically, the method of selectively controlling the connection of the corresponding second circulation part 512 with the supply device 3 and the spray device 4 respectively in order from high to low according to the current temperature value of each phase change material includes: when one of the second circulation parts 512 is connected to the supply device 3 and the spray device 4 respectively, obtaining the current temperature of the corresponding phase change material; when the current temperature of the corresponding phase change material is less than the first preset temperature value, controlling the second circulation part 512 to be disconnected from the supply device 3 and the spray device 4 respectively; and controlling when another second circulation part 512 in each second circulation part 512 is connected to the supply device 3 and the spray device 4 respectively. With such a control method, the flow of the defrosting liquid is ensured by preferentially selecting a phase change energy storage heat exchanger with a higher temperature to ensure that the defrosting liquid can absorb enough heat. Thereby improving the energy utilization rate of the system. In addition, the high-temperature phase change material preferentially participates in the heat exchange to ensure that the defrosting liquid obtains enough heat to melt the frost layer. Thereby improving the defrosting effect. In addition, the on-off state of each second circulation part 512 is dynamically adjusted according to the real-time temperature data to ensure that the best defrosting effect can be provided under any conditions. This flexibility enables the system to cope with various complex working conditions and enhances the stability and reliability of the system.

[0097] The first preset temperature value refers to the lower limit of the phase change temperature range of the phase change material. When the current temperature of the phase change material is less than the first preset temperature value, it indicates that the phase change material has been completely solidified.

[0098] Optionally, when one of the second circulation parts 512 is respectively connected to the supply device 3 and the spray device 4 , the other second circulation parts 512 are disconnected from the supply device 3 , so that the defrosting liquid cannot enter the other second circulation parts 512 .

[0099] Specifically, the control method further includes: after the defrost mode is running, detecting the current defrost state of the evaporator device 2; when any one of the second circulation parts 512 is respectively connected to the supply device 3 and the spray device 4, it is detected that the evaporator device 2 has completed defrosting, then the defrost mode is switched to the refrigeration mode; when each of the second circulation parts 512 is respectively disconnected from the supply device 3 and the spray device 4, it is detected that the evaporator device 2 has not completed defrosting, then the defrost mode is switched to the refrigeration mode; when switching to the refrigeration mode, when the current temperature of the phase change material corresponding to at least one of the second circulation parts 512 is greater than or equal to the third preset temperature value, the refrigeration mode is switched to the defrost mode, and the defrosting continues; wherein the third preset temperature value is greater than the first preset temperature value. With such a control method, after the system is running in the defrost mode, the current defrost state of the evaporator device 2 is detected in real time to ensure that the defrosting progress can be understood in time. This real-time monitoring mechanism improves the response speed of the system and ensures the efficiency and thoroughness of the defrosting operation. When it is detected that the evaporator has been defrosted, the system immediately switches back to the cooling mode, avoiding unnecessary defrosting operations and energy waste. This precise control reduces the operating time of the equipment in defrosting mode, prolongs the equipment life and reduces energy consumption. At the same time, the system intelligently determines when to re-enter the defrosting mode based on the temperature of the phase change material, ensuring that sufficient heat can be used for each defrosting, thereby improving the defrosting efficiency. In addition, the working mode is dynamically adjusted through real-time temperature data to ensure that the system is always in the best operating state. This increases the flexibility, stability and reliability of the system.

[0100] Among them, setting the third preset temperature value and designing the third preset temperature value to be greater than the first preset temperature value is to ensure that the defrost mode will be started again only when the phase change material stores sufficient heat, thereby ensuring the thoroughness and efficiency of the defrost effect.

[0101] Optionally, in the defrost mode, the defrosting status of the evaporator device 2 is detected in real time. When any one of the second circulation parts 512 is connected to the supply device 3 and the spray device 4, respectively, and it is detected that the evaporator device 2 has completed defrosting, each of the second circulation parts 512 is controlled to be disconnected from the supply device 3 and the spray device 4, respectively, and the defrost mode is switched to the refrigeration mode. When each of the second circulation parts 512 has been connected to the supply device 3 and the spray device 4, respectively, and the phase change materials corresponding to the current second circulation parts 512 are all less than the first preset temperature value, it is detected that the evaporator device 2 has not completed defrosting, then the defrost mode is suspended and the defrost mode is switched to the refrigeration mode. When the current temperature of at least one of the phase change materials corresponding to each of the second circulation parts 512 is greater than or equal to the third preset temperature value, it is switched to the defrost mode and the defrost mode is continued.

[0102] Specifically, after the refrigeration mode is running, the method for judging whether to switch to the defrost mode includes: after the refrigeration mode is running, judging whether the evaporator device 2 is in defrost condition; if the evaporator device 2 reaches the defrost condition, obtaining the current temperature value of the phase change material of each first phase change energy storage heat exchanger 51; if the current temperature value of the phase change material of each first phase change energy storage heat exchanger 51 is less than the first preset temperature value, maintaining the refrigeration mode; if the current temperature value of the phase change material of at least one first phase change energy storage heat exchanger 51 in each first phase change energy storage heat exchanger 51 is greater than the first preset temperature value, switching the refrigeration mode to the defrost mode. With such a control method, when the evaporator device 2 reaches the defrost condition, the current temperature of the phase change material is used to intelligently judge when to enter the defrost mode, ensuring that sufficient heat can be used for each defrost, thereby improving the defrost efficiency. Ineffective defrosting operations are also avoided, reducing energy waste.

[0103] Further, when the evaporator device 2 does not reach the defrosting condition, the cooling mode is maintained.

[0104] Furthermore, the method for determining whether the evaporator device 2 is in defrost condition includes: obtaining the current temperature of the target area and the air outlet temperature of the refrigeration equipment, and when the temperature difference between the current temperature of the target area and the air outlet temperature of the refrigeration equipment is less than or equal to the defrost temperature difference setting value, determining that the evaporator device 2 has reached the defrost condition; if the temperature difference between the current temperature of the target area and the air outlet temperature of the refrigeration equipment is greater than the defrost temperature difference setting value, determining that the evaporator device 2 has not reached the defrost condition.

[0105] Specifically, if the evaporator device 2 has two evaporators 21, the two evaporators 21 are arranged in series; if the spray device 4 has two sprayers 41, the two evaporators 21 are arranged in a one-to-one correspondence with the two sprayers 41, each sprayer 41 is arranged above the corresponding evaporator 21, and each sprayer 41 is respectively connected to the output end of each second flow part 512 in a switchable manner; the control method also includes: when one of the two evaporators 21 reaches the defrost condition and the refrigeration mode is switched to the defrost mode, the sprayer 41 corresponding to the evaporator 21 that reaches the defrost condition is connected to the output end of one of the second flow parts 512 in each second flow part 512; when both of the two evaporators 21 reach the defrost condition and the refrigeration mode is switched to the defrost mode, the sprayers 41 corresponding to the two evaporators 21 are connected to the output end of one of the second flow parts 512 in each second flow part 512 in sequence. By adopting such a control method, the connection state of each sprayer 41 with the second circulation part 512 is selectively controlled in turn according to actual needs, ensuring that the defrost liquid is distributed to the corresponding evaporator 21 as needed. This ensures that the defrost liquid can be accurately sprayed onto the corresponding evaporator surface that needs to be defrosted. This improves the accuracy and efficiency of the spraying, avoids the waste and uneven distribution of the defrost liquid, and improves the defrosting efficiency. In addition, each sprayer 41 can be started and stopped independently, reducing the overall response time of the system. When rapid defrosting is required, the system can quickly start the corresponding sprayer 41 to deal with the problem of frost accumulation in a timely manner.

[0106] Specifically, if the refrigerant flowing out of the condenser 1 flows to the first energy storage heat exchange device 5, the method of sequentially controlling the connection between each first circulation part 511 and the condenser 1 and the evaporator device 2 respectively includes: obtaining the current temperature value of the phase change material of each first phase change energy storage heat exchanger 51; and sequentially controlling the connection between the corresponding first circulation part 511 and the condenser 1 and the evaporator device 2 respectively from low to high according to the current temperature value of each phase change material. By adopting such a control method, the connection between each first circulation part 511 and the condenser 1 and the evaporator device 2 respectively can be accurately controlled through the current temperature value of the phase change material of each first phase change energy storage heat exchanger 51, so as to effectively adjust the flow direction of the refrigerant, realize efficient absorption and storage of the waste heat of the refrigerant, thereby improving the energy efficiency and capacity utilization rate of the system, reducing energy waste, and reducing energy consumption and the operating cost of the system. At the same time, the temperature of the refrigerant can be further reduced, thereby improving the refrigeration effect, the refrigeration capacity of the system and the performance coefficient.

[0107] Specifically, if the method of controlling the connection between the corresponding first circulation parts 511 and the condenser 1 and the evaporator device 2 in order from low to high according to the current temperature value of each phase change material, the method includes: when one of the first circulation parts 511 is connected to the condenser 1 and the evaporator device 2, the current temperature of the corresponding phase change material is obtained; when the current temperature of the corresponding phase change material is greater than the second preset temperature value, the first circulation part 511 is controlled to be disconnected from the condenser 1 and the evaporator device 2; and another first circulation part 511 in each first circulation part 511 is controlled to be connected to the condenser 1 and the evaporator device 2. By adopting such a control method, by real-time monitoring the current temperature of the phase change material corresponding to the first circulation part 511 in the connected state, it is possible to prevent the corresponding phase change material from still performing invalid heat transfer after reaching the preset threshold, thereby reducing energy consumption and improving energy utilization.

[0108] Optionally, when one of the first circulation parts 511 is respectively connected to the condenser 1 and the evaporator device 2 , the other first circulation parts 511 are disconnected from the condenser 1 .

[0109] The second preset temperature value refers to the lower limit of the phase change temperature range of the phase change material. When the current temperature of the phase change material is greater than the second preset temperature value, it means that the phase change material has been completely melted. The first preset temperature value is less than the second preset temperature value. When the current temperature of the phase change material is less than or equal to the second preset temperature value and greater than or equal to the first preset temperature value, it means that the phase change material is in a solid-liquid mixed state.

[0110] The third preset temperature value is equal to or less than the second preset temperature value.

[0111] Specifically, the control method further includes: in the refrigeration mode, obtaining the current temperature of the phase change material corresponding to each first circulation part 511; after a preset time, comparing the current temperature of the phase change material corresponding to each first circulation part 511; and controlling the fourth control valve 9 corresponding to the phase change material whose current temperature is at the highest value to open according to the comparison result. By adopting such a control method, the fourth control valve 9 corresponding to the phase change material whose current temperature is at the highest value is controlled to open, so that the system can start an effective defrosting operation in the shortest time and quickly deal with the problem of frost accumulation. Thereby improving the response speed of the system. And it can also ensure that the defrosting liquid can flow through the heat exchanger with the highest temperature first, thereby improving the heat extraction efficiency.

[0112] Optionally, in the refrigeration mode, the temperature of the phase change material of each first phase change energy storage heat exchanger 51 is detected once at each preset time. When the temperature of the phase change material of only one first phase change energy storage heat exchanger 51 among each first phase change energy storage heat exchanger 51 is greater than or equal to the second preset temperature value, the first phase change energy storage heat exchanger 51 is selected as the defrosting energy storage unit, and the fourth control valve 9 of the first phase change energy storage heat exchanger 51 is controlled to open. When the temperature of the phase change material of at least two first phase change energy storage heat exchangers 51 among each first phase change energy storage heat exchanger 51 is greater than or equal to the second preset temperature value, the first phase change energy storage heat exchanger 51 corresponding to the phase change material with the highest temperature is selected as the defrosting energy storage unit, and the fourth control valve 9 of the first phase change energy storage heat exchanger 51 is controlled to open. The other fourth control valves 9 are in a closed state.

[0113] It can be understood that when the phase change material of the first first phase change energy storage heat exchanger 51 in each first phase change energy storage heat exchanger 51 is greater than or equal to the second preset temperature value, the first phase change energy storage heat exchanger 51 is first selected as the defrost energy storage unit. After a period of time, when the phase change material of the second first phase change energy storage heat exchanger 51 in each first phase change energy storage heat exchanger 51 is greater than or equal to the second preset temperature value, the temperature of the phase change materials of the two first phase change energy storage heat exchangers 51 is judged, and the first phase change energy storage heat exchanger 51 corresponding to the phase change material with the highest temperature is selected as the defrost energy storage unit. Whichever first phase change energy storage heat exchanger 51 is selected as the defrost energy storage unit, the corresponding fourth control valve 9 is in an open state.

[0114] Optionally, when the number of detections reaches a preset number of times, and the temperature of the phase change materials in each first phase change energy storage heat exchanger 51 is less than the second preset temperature value, the first phase change energy storage heat exchanger 51 corresponding to the phase change material with the highest current temperature is selected as the defrost energy storage unit. Then, during the next detection, the defrost energy storage unit is reselected based on the comparison result of the temperature of the phase change materials in each first phase change energy storage heat exchanger 51.

[0115] Specifically, if the fourth control valve 9 and the first phase change energy storage device each have N, N ≥ 3; the control method further includes: when the current temperature value of the phase change material of each first phase change energy storage device is greater than the second preset temperature value in the refrigeration mode, the first flow portion 511 of one of the first phase change energy storage devices corresponding to each fourth control valve 9 in the closed state is controlled to be connected to the condenser 1 and the evaporator device 2 respectively. Such a control method is adopted to ensure that the refrigerant can smoothly enter the evaporator device 2.

[0116] Specifically, the control method further includes: after the cooling mode is turned on, the current outdoor temperature is obtained to determine whether the refrigerant flowing out of the condenser 1 flows to the first energy storage heat exchange device 5 according to the current outdoor temperature; if the current outdoor temperature is greater than or equal to the fourth preset temperature value, the refrigerant flowing out of the condenser 1 is controlled to flow to the first energy storage heat exchange device 5; if the current outdoor temperature is less than the fourth preset temperature value, the refrigerant flowing out of the condenser 1 is controlled to flow to the second energy storage heat exchange device 13. With such a control method, the refrigerant and the defrost liquid are selectively controlled to flow to the first energy storage heat exchange device 5 or the second energy storage heat exchange device 13 according to the current outdoor temperature. It can ensure that the outdoor temperature controls the flow direction of the refrigerant and the defrost liquid, and then different phase change temperatures can be used to effectively recover the waste heat of the condenser and ensure the best heat recovery effect. And by automatically switching between the first energy storage heat exchange device 5 and the second energy storage heat exchange device 13 according to the ambient temperature, load demand and phase change material temperature, the system can adapt to different seasons and ensure that the system can effectively perform waste heat defrosting and refrigerant secondary supercooling in different environments, thereby maximizing energy utilization efficiency.

[0117] Among them, the phase change temperature of the phase change material of the first energy storage heat exchange device 5 is different from the phase change temperature of the phase change material of the second energy storage heat exchange device 13 , and the phase change temperature of the phase change material of the first energy storage heat exchange device 5 is greater than the phase change temperature of the phase change material of the second energy storage heat exchange device 13 .

[0118] For example, the phase change temperature range of the phase change material of the first energy storage heat exchange device 5 is selected to be 45°C~50°C, and the phase change temperature range of the phase change material of the second energy storage heat exchange device 13 is selected to be 25°C~30°C.

[0119] The phase change temperature range of the phase change material is selected according to actual needs, and the phase change temperature of the phase change material can be between 0 and 100 ° C. The phase change temperature range should be slightly lower than the refrigerant temperature at the condenser outlet, so that the phase change material can be completely melted and the latent heat can be absorbed to the maximum extent, so it can vary according to different units.

[0120] For example, when the outdoor temperature is greater than or equal to 20° C., the refrigerant flows to the first energy storage heat exchange device 5 . When the outdoor temperature is less than 20° C., the refrigerant flows to the second energy storage heat exchange device 13 .

[0121] For another example, in winter, the refrigerant is used to flow to the second energy storage heat exchange device 13, and in summer, the refrigerant is used to flow to the first energy storage heat exchange device 5.

[0122] Optionally, the working process of the control system is specifically as follows: Among them, the control system Figure 1As shown, there are two evaporators 21, two water receiving trays 31, two water pumps 32, and two sprayers 41, and there are N first phase-change energy storage heat exchangers 51 and N second phase-change energy storage heat exchangers 131, where N≥3.

[0123] Step 1: After the cold storage is turned on, the cooling mode is entered and the current outdoor temperature is obtained; according to the current outdoor temperature, it is determined whether the refrigerant flowing out of the condenser 1 flows to the first energy storage heat exchange device 5. In addition, it is also determined whether to switch to the defrost mode.

[0124] Step 2: If the current outdoor temperature is greater than or equal to the fourth preset temperature value, control the refrigerant flowing out of the condenser 1 to flow to the first energy storage heat exchange device 5, then obtain the current temperature value of the phase change material of each first phase change energy storage heat exchanger 51, and compare the current temperature value of the phase change material of each first phase change energy storage heat exchanger 51, and control the connection between the corresponding first circulation part 511 and the condenser 1 and the evaporator device 2 from low to high. Thereby, the refrigerant flowing out of the first energy storage heat exchange device 5 enters each evaporator 21 in turn to achieve a cooling effect.

[0125] Specifically, in the cooling mode, the third control valve 8 and each fourth control valve 9 are controlled to be in a closed state; the second control valve 7 is controlled to be opened, and the current temperature of the phase change material of each first phase change energy storage heat exchanger 51 is obtained. According to the current temperature of the phase change material of each first phase change energy storage heat exchanger 51, the corresponding first control valve 6 is controlled to be opened in sequence from low to high. When the first control valve 6 corresponding to the first phase change energy storage heat exchanger 51 whose current temperature of the phase change material is the lowest is opened, the first flow portion 511 of the first phase change energy storage heat exchanger 51 is connected to the condenser 1 and the evaporator device 2 respectively, and the phase change material of the first phase change energy storage heat exchanger 51 absorbs and stores the heat released by the refrigerant. When the phase change material of the first phase change energy storage heat exchanger 51 is completely melted (that is, when the heat absorption is completed), the first control valve 6 corresponding to the first phase change energy storage heat exchanger 51 is controlled to be closed. Then the first control valve 6 corresponding to the first phase change energy storage heat exchanger 51 whose current temperature of the phase change material is the second lowest is controlled to be opened. Then, the same is true. When switching from the cooling mode to the defrosting mode, the first control valve 6 and the second control valve 7 are controlled to be in a closed state.

[0126] Among them, when the current temperatures of the phase change materials of each first phase change energy storage heat exchanger 51 are consistent, the opening and closing of the first control valve 6 are controlled in sequence according to the installation position or preset designation or coding of each first phase change energy storage heat exchanger 51.

[0127] Step 3, in the cooling mode, during the flow of the refrigerant, the temperature of the phase change material of each first phase change energy storage heat exchanger 51 is detected once at each preset time. When the temperature of the phase change material of only one first phase change energy storage heat exchanger 51 among each first phase change energy storage heat exchanger 51 is greater than or equal to the second preset temperature value, the first phase change energy storage heat exchanger 51 is selected as the defrosting energy storage unit, and the fourth control valve 9 of the first phase change energy storage heat exchanger 51 is controlled to open. When the temperature of the phase change material of at least two first phase change energy storage heat exchangers 51 among each first phase change energy storage heat exchanger 51 is greater than or equal to the second preset temperature value, the first phase change energy storage heat exchanger 51 corresponding to the phase change material with the highest temperature is selected as the defrosting energy storage unit, and the fourth control valve 9 of the first phase change energy storage heat exchanger 51 is controlled to open. The other fourth control valves 9 are in a closed state.

[0128] It can be understood that when the phase change material of the first first phase change energy storage heat exchanger 51 in each first phase change energy storage heat exchanger 51 is greater than or equal to the second preset temperature value, the first phase change energy storage heat exchanger 51 is first selected as the defrost energy storage unit. After a period of time, when the phase change material of the second first phase change energy storage heat exchanger 51 in each first phase change energy storage heat exchanger 51 is greater than or equal to the second preset temperature value, the temperature of the phase change materials of the two first phase change energy storage heat exchangers 51 is judged, and the first phase change energy storage heat exchanger 51 corresponding to the phase change material with the highest temperature is selected as the defrost energy storage unit. Whichever first phase change energy storage heat exchanger 51 is selected as the defrost energy storage unit, the corresponding fourth control valve 9 is in an open state.

[0129] Optionally, when the number of detections reaches a preset number of times, and the temperature of the phase change materials in each first phase change energy storage heat exchanger 51 is less than the second preset temperature value, the first phase change energy storage heat exchanger 51 corresponding to the phase change material with the highest current temperature is selected as the defrost energy storage unit. Then, during the next detection, the defrost energy storage unit is reselected based on the comparison result of the temperature of the phase change materials in each first phase change energy storage heat exchanger 51.

[0130] Step 4, when at least one of the two evaporators 21 reaches the defrost condition, and the current temperature value of the phase change material of at least one of the first phase change energy storage heat exchangers 51 is greater than the first preset temperature value, the refrigeration mode is switched to the defrost mode.

[0131] Step 5, in the defrosting mode, the first control valve 6 and the second control valve 7 are controlled to be closed, and the third control valve 8, the water pump 32 and the fifth control valve 11 corresponding to the evaporator 21 to be defrosted are controlled to be opened, so that the defrosting liquid flows out from the water receiving tray 31 corresponding to the evaporator 21 to be defrosted, and then flows into the second flow portion 512 of the first phase change energy storage heat exchanger 51 corresponding to the fourth control valve 9 in the open state through the water pump 32, the filter device 10, the third control valve 8 and the fourth control valve 9 in the open state in sequence to absorb heat. The defrosting liquid after absorbing heat flows to the sprayer 41 corresponding to the evaporator 21 to be defrosted through the open fifth control valve 11, and finally the sprayer 41 sprays the defrosting liquid onto the surface of the evaporator 21, and the melted water flows back to the water receiving tray 31 after defrosting, so as to circulate.

[0132] Step 6: When both evaporators 21 reach the defrosting condition, after entering the defrosting mode, the two evaporators 21 are defrosted in sequence. Preferably, the evaporators 21 are sorted according to the refrigeration temperature, and the evaporator 21 corresponding to the lower refrigeration temperature is defrosted first.

[0133] Among them, when the phase change material of the released heat is less than the first preset temperature value (that is, when the phase change material becomes solid), the fourth control valve 9 in the open state is controlled to switch to the closed state, and then the corresponding fourth control valves 9 are opened in sequence from high to low according to the current temperature of the phase change materials of the other first phase change energy storage heat exchangers 51. One fourth control valve 9 is opened, and the other fourth control valves 9 are all in the closed state. Among them, in the defrosting state, when any one of the second circulation parts 512 is respectively connected to the supply device 3 and the spray device 4, and it is detected that the evaporator device 2 has completed defrosting, each second circulation part 512 is controlled to be disconnected from the supply device 3 and the spray device 4, and the defrosting mode is switched to the refrigeration mode. In the defrost mode, when each second circulation part 512 is connected to the supply device 3 and the spray device 4 respectively, and the phase change materials corresponding to each second circulation part 512 are currently less than the first preset temperature value, it is detected that the evaporator device 2 has not completed defrosting, then the defrost mode is suspended, the third control valve 8 and each fourth control valve 9 are controlled to be in a closed state, and the refrigeration mode is switched. When the current temperature of at least one phase change material in the phase change material corresponding to each second circulation part 512 is greater than or equal to the third preset temperature value, the defrost mode is switched to continue the defrost mode. After the defrost is completed, the refrigeration mode is switched again.

[0134] Step 7: When the current outdoor temperature is less than the fourth preset temperature value, control the refrigerant flowing out of the condenser 1 to flow to the second energy storage heat exchange device 13. The control process of the second energy storage heat exchange device 13 is the same as that of the first energy storage heat exchange device 5, and will not be repeated here.

[0135] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable when appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0136] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0137] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0138] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0139] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A control system, characterized in that: include: A condenser (1) and an evaporator device (2) connected in sequence; A supply device (3) and a spray device (4) connected to each other, the supply device (3) being used to convey defrosting liquid to the spray device (4); the spray device (4) being arranged above the evaporator device (2) and being used to spray and defrost the evaporator device (2); A first energy storage heat exchange device (5) for heat exchange and heat storage; the first energy storage heat exchange device (5) comprises at least two first phase-change energy storage heat exchangers (51), each of the first phase-change energy storage heat exchangers (51) being provided with a first circulation portion (511) for circulation of refrigerant and a second circulation portion (512) for circulation of defrosting liquid; each of the first circulation portions (511) is connected to the condenser (1) and the evaporator (21) in a manner that they can be switched on and off, and each of the second circulation portions (512) is connected to the supply device (3) and the spray device (4) in a manner that they can be switched on and off; In the cooling mode, each of the first circulation parts (511) is controlled to be connected to the condenser (1) and the evaporator device (2) in sequence, so that the phase change material of each of the first phase change energy storage heat exchangers (51) absorbs the heat released by the refrigerant flowing into the corresponding first circulation part (511) in sequence and stores it, and each of the second circulation parts (512) is controlled to be disconnected from the supply device (3) and the spray device (4) respectively; in the defrosting mode, each of the first circulation parts (511) is controlled to be disconnected from the condenser (1) and the evaporator device (2), and according to the current temperature of the phase change material of each of the first phase change energy storage heat exchangers (51), each of the second circulation parts (512) is adaptively controlled to be connected to the supply device (3) and the spray device (4) respectively.

2. The control system according to claim 1, characterized in that: The control system further comprises: a control device, the control device being used to determine whether to switch from the refrigeration mode to the defrost mode and to obtain the current temperature of the phase change material of each of the first phase change energy storage heat exchangers (51), and adaptively controlling the connection and disconnection of each of the first circulation parts (511) with the condenser (1) and the evaporator device (2), and the connection and disconnection of each of the second circulation parts (512) with the supply device (3) and the spray device (4), according to the determination result and the current temperature of each of the phase change materials.

3. The control system according to claim 1, characterized in that: The control system further comprises: at least two first control valves (6), each of the first control valves (6) being arranged in one-to-one correspondence with each of the first phase-change energy storage heat exchangers (51), each of the first control valves (6) being connected to an input end of a corresponding first circulation portion (511) and an output end of the condenser (1), respectively; each of the first control valves (6) being used to control the connection and disconnection between the corresponding first circulation portion (511) and the condenser (1); A second control valve (7), wherein the input end of the second control valve (7) is respectively connected to the output end of each first circulation part (511), and the output end of the second control valve (7) is connected to the input end of the evaporator device (2); the second control valve (7) is used to control the connection and disconnection between each first circulation part (511) and the evaporator device (2).

4. The control system according to claim 1, characterized in that: The control system further comprises: a third control valve (8), the input end of the third control valve (8) being connected to the output end of the supply device (3), and the output end of the third control valve (8) being respectively connected to the input end of each second circulation part (512); the third control valve (8) being used for controlling the connection and disconnection between the supply device (3) and the input end of each second circulation part (512); At least two fourth control valves (9), each of the fourth control valves (9) being arranged in one-to-one correspondence with each of the first phase-change energy storage heat exchangers (51), each of the fourth control valves (9) being arranged respectively between the third control valve (8) and the input end of the corresponding second circulation part (512), and each of the fourth control valves (9) being connected respectively to the input end of the corresponding second circulation part (512) and the output end of the third control valve (8).

5. The control system according to claim 1, characterized in that: The control system further comprises: a filtering device (10), the filtering device (10) being arranged between the supply device (3) and the first energy storage heat exchange device (5), the filtering device (10) being respectively connected to an input end of the supply device (3) and an input end of each of the second circulation parts (512); the filtering device (10) being used for filtering the defrosting liquid.

6. The control system according to claim 1, characterized in that: The evaporator device (2) comprises: at least one evaporator (21), the input end of the evaporator (21) being connectably connected to the output end of each of the first circulation parts (511); The supply device (3) comprises: at least one water receiving tray (31), the water receiving tray (31) being arranged in one-to-one correspondence with the evaporator (21), the water receiving tray (31) being arranged below the corresponding evaporator (21), the water receiving tray (31) being used to collect and store defrost liquid flowing down from the evaporator (21); the output end of the water receiving tray (31) being connected to the input end of each second circulation portion (512) in a disconnectable manner.

7. The control system according to claim 6, characterized in that: The supply device (3) further comprises: at least one water pump (32), the water pump (32) being arranged in one-to-one correspondence with the water receiving tray (31), the input end of the water pump (32) being connected to the output end of the corresponding water receiving tray (31), and the output end of the water pump (32) being connected to the input end of each second circulation portion (512) in a disconnectable manner; and / or A water replenishment pipeline (33), the water replenishment pipeline (33) being connected to the water receiving tray (31), the water replenishment pipeline (33) being used to replenish the water receiving tray (31) with defrost liquid.

8. The control system according to claim 1, characterized in that: The evaporator device (2) comprises: an evaporator (21), wherein an input end of at least one of the evaporators (21) is connected to an output end of each of the first circulation parts (511) in an on-off manner; The spray device (4) comprises: at least one sprayer (41), the sprayer (41) being arranged in one-to-one correspondence with the evaporator (21), the sprayer (41) being arranged above the corresponding evaporator (21), and the sprayer (41) being used to spray defrosting liquid onto the corresponding evaporator (21) for defrosting; an input end of the sprayer (41) is connectably connected to an output end of each second circulation portion (512).

9. The control system according to claim 8, characterized in that: The control system further comprises: at least one fifth control valve (11), the fifth control valve (11) being arranged in one-to-one correspondence with the sprayers (41), the fifth control valve (11) being respectively connected to an input end of the corresponding sprayer (41) and an output end of each second circulation part (512); the fifth control valve (11) being used to control the connection and disconnection between the output end of each second circulation part (512) and the corresponding sprayer (41).

10. The control system according to claim 2, characterized in that: Each of the first phase-change energy storage heat exchangers (51) is provided with a first temperature detection device (12), and the first temperature detection device (12) on each of the first phase-change energy storage heat exchangers (51) is used to detect the temperature of the phase change material of the corresponding first phase-change energy storage heat exchanger (51); Wherein, each of the first temperature detection devices (12) is connected to the control device, and each of the first temperature detection devices (12) sends the detected temperature of the phase change material of the corresponding first phase change energy storage heat exchanger (51) to the control device.

11. The control system according to claim 1, characterized in that: The control system further comprises: a second energy storage heat exchange device (13) for heat exchange and heat storage; the second energy storage heat exchange device (13) comprises at least two second phase-change energy storage heat exchangers (131), each of the second phase-change energy storage heat exchangers (131) being provided with a third circulation portion (1311) for circulation of refrigerant and a fourth circulation portion (1322) for circulation of defrosting liquid; each of the third circulation portions (1311) being respectively connected to the condenser (1) and the evaporator (21) in a switchable manner, and each of the fourth circulation portions (1322) being respectively connected to the supply device (3) and the spray device (4) in a switchable manner; the first energy storage heat exchange device (5) and the second energy storage heat exchange device (13) being arranged in parallel; A control device, the control device is used to obtain the current outdoor temperature, so as to selectively control the refrigerant and the defrost liquid to flow to the first energy storage heat exchange device (5) or the second energy storage heat exchange device (13) according to the current outdoor temperature.

12. A refrigeration device, characterized in that: include: A control system as claimed in any one of claims 1 to 11.

13. A control method, characterized in that: The control method is applied to the control system according to any one of claims 1 to 11, and the control method comprises: After the cooling mode is running, the flow path of the refrigerant is controlled and it is determined whether to switch to the defrosting mode; If the refrigerant flowing out of the condenser (1) is controlled to flow to the first energy storage heat exchange device (5), the connection between each of the first circulation parts (511) and the condenser (1) and the evaporator device (2) is controlled in sequence, so that the phase change material of each of the first phase change energy storage heat exchangers (51) absorbs the heat released by the refrigerant flowing into the corresponding first circulation part (511) in sequence and stores the heat; If the refrigeration mode is switched to the defrosting mode, obtaining the current temperature value of the phase change material of each of the first phase change energy storage heat exchangers (51); According to the current temperature value of the phase change material of each of the first phase change energy storage heat exchangers (51), the connection between each of the second circulation parts (512) and the supply device (3) and the spray device (4) is adaptively controlled, so that the defrost liquid flowing into at least one of the second circulation parts (512) absorbs the heat released by the corresponding phase change material, and the defrost liquid after absorbing the heat flows to the spray device (4).

14. The control method according to claim 13, characterized in that: The method of adaptively controlling the connection of each of the second circulation parts (512) with the supply device (3) and the spray device (4) respectively according to the current temperature value of the phase change material of each of the first phase change energy storage heat exchangers (51) when the refrigeration mode is switched to the defrosting mode comprises: If the refrigeration mode is switched to the defrosting mode, comparing the current temperature values ​​of the phase change materials of each of the first phase change energy storage heat exchangers (51); According to the current temperature value of each phase change material, the connection between the corresponding second circulation part (512) and the supply device (3) and the spray device (4) is selectively controlled in sequence from high to low.

15. The control method according to claim 14, characterized in that: The method of selectively controlling the connection of the corresponding second circulation part (512) with the supply device (3) and the spray device (4) in order from high to low according to the current temperature value of each phase change material, comprises: When one of the second circulation parts (512) is connected to the supply device (3) and the spray device (4) respectively, obtaining the current temperature of the corresponding phase change material; When the current temperature of the corresponding phase change material is less than a first preset temperature value, the second circulation part (512) is controlled to be disconnected from the supply device (3) and the spray device (4) respectively; and another second circulation part (512) in each second circulation part (512) is controlled to be connected to the supply device (3) and the spray device (4) respectively.

16. The control method according to claim 15, characterized in that: The control method further comprises: After the defrost mode is running, detecting the current defrost state of the evaporator device (2); When any one of the second circulation parts (512) is connected to the supply device (3) and the spray device (4), respectively, it is detected that the evaporator device (2) has completed defrosting, and the defrosting mode is switched to the refrigeration mode; When each of the second circulation parts (512) is disconnected from the supply device (3) and the spray device (4) respectively, it is detected that the evaporator device (2) has not completed defrosting, and the defrosting mode is switched to the refrigeration mode; When switching to the refrigeration mode, when the current temperature of the phase change material corresponding to at least one of the second circulation parts (512) is greater than or equal to a third preset temperature value, the refrigeration mode is switched to the defrosting mode to continue defrosting; Wherein, the third preset temperature value is greater than the first preset temperature value.

17. The control method according to claim 13, characterized in that: After the refrigeration mode is running, the method for determining whether to switch to the defrosting mode comprises: After the refrigeration mode is running, determining whether the evaporator device (2) reaches a defrosting condition; If the evaporator device (2) reaches a defrosting condition, obtaining a current temperature value of the phase change material of each of the first phase change energy storage heat exchangers (51); If the current temperature value of the phase change material of each of the first phase change energy storage heat exchangers (51) is less than the first preset temperature value, maintaining the cooling mode; If the current temperature value of the phase change material of at least one of the first phase change energy storage heat exchangers (51) is greater than a first preset temperature value, the refrigeration mode is switched to the defrosting mode.

18. The control method according to claim 17, characterized in that: If the evaporator device (2) has two evaporators (21), the two evaporators (21) are arranged in series; if the spray device (4) has two sprayers (41), the two evaporators (21) and the two sprayers (41) are arranged in one-to-one correspondence, each of the sprayers (41) is arranged above the corresponding evaporator (21), and each of the sprayers (41) is connected to the output end of each of the second circulation parts (512) in a disconnectable manner; The control method further comprises: When one of the two evaporators (21) reaches a defrosting condition and the refrigeration mode is switched to the defrosting mode, the sprayer (41) corresponding to the evaporator (21) that reaches the defrosting condition is connected to an output end of one of the second circulation parts (512); When both evaporators (21) reach the defrosting condition and the refrigeration mode is switched to the defrosting mode, the sprayers (41) corresponding to the two evaporators (21) are sequentially connected to the output end of one of the second circulation parts (512) in each of the second circulation parts (512).

19. The control method according to claim 13, characterized in that: The method of sequentially controlling the connection of each of the first circulation parts (511) with the condenser (1) and the evaporator device (2) respectively if the refrigerant flowing out of the condenser (1) flows to the first energy storage heat exchange device (5), comprises: Acquiring the current temperature value of the phase change material of each of the first phase change energy storage heat exchangers (51); According to the current temperature value of each phase change material, the connection between the corresponding first circulation part (511) and the condenser (1) and the evaporator device (2) is controlled in sequence from low to high.

20. The control method according to claim 19, characterized in that: The method of controlling the connection between the corresponding first circulation parts (511) and the condenser (1) and the evaporator device (2) in order from low to high according to the current temperature value of each phase change material comprises: When one of the first circulation parts (511) is connected to the condenser (1) and the evaporator device (2), respectively, obtaining the current temperature of the corresponding phase change material; When the current temperature of the corresponding phase change material is greater than a second preset temperature value, the first circulation part (511) is controlled to be disconnected from the condenser (1) and the evaporator device (2) respectively; and another first circulation part (511) in each of the first circulation parts (511) is controlled to be connected to the condenser (1) and the evaporator device (2) respectively.

21. The control method according to claim 20, characterized in that: The control method is applied to the control system according to claim 4, and the control method further comprises: In a cooling mode, obtaining the current temperature of the phase change material corresponding to each of the first circulation parts (511); After a preset time, comparing the current temperatures of the phase change materials corresponding to each of the first circulation parts (511); According to the comparison result, the fourth control valve (9) corresponding to the phase change material whose current temperature is at the highest value is controlled to open.

22. The control method according to claim 21, characterized in that: If the fourth control valve (9) and the first phase change energy storage device both have N, and N≥3; the control method further includes: When, in the cooling mode, the current temperature value of the phase change material of each of the first phase change energy storage devices is greater than the second preset temperature value, the first flow portion (511) of one of the first phase change energy storage devices corresponding to each of the fourth control valves (9) in the closed state is controlled to be connected to the condenser (1) and the evaporator device (2) respectively.

23. The control method according to claim 13, characterized in that: The control method is applied to the control system according to claim 11, and the control method further comprises: After the cooling mode is turned on, the current outdoor temperature is obtained to determine whether the refrigerant flowing out of the condenser (1) flows to the first energy storage heat exchange device (5) according to the current outdoor temperature; If the current outdoor temperature is greater than or equal to a fourth preset temperature value, controlling the refrigerant flowing out of the condenser (1) to flow to the first energy storage and heat exchange device (5); If the current outdoor temperature is lower than a fourth preset temperature value, the refrigerant flowing out of the condenser (1) is controlled to flow to the second energy storage and heat exchange device (13).

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