Refrigerating system, refrigerating control method, electronic equipment and storage medium

Abstract

The invention discloses a refrigeration system, a refrigeration control method, electronic equipment and a storage medium. The refrigerating system is applied to the refrigeration house, the refrigeration house comprises a low-temperature area and a high-temperature area, and the refrigerating system comprises a liquid supply device, a refrigerating fluid storage device and a control device, the air cooler is located in the low-temperature area and connected with the liquid supply device to form a refrigerating loop; the at least one low-temperature area cold storage plate is mounted at the at least one goods shelf of the low-temperature area in a one-to-one correspondence manner, and the low-temperature area cold storage plate is connected with the liquid supply device to form a cold storage loop; and the at least one high-temperature area cold storage plate is installed at the at least one goods shelf of the high-temperature area in a one-to-one correspondence mode, the low-temperature area cold storage plate and the high-temperature area cold storage plate are connected through a secondary refrigerant pipeline to form a secondary refrigerant loop, and the cold capacity of the low-temperature area cold storage plate is sent to the high-temperature area cold storage plate through the secondary refrigerant loop for cold storage or cold release. The condition that the temperature of the refrigeration house is not uniform can be effectively improved, redundant cold energy generated after cold storage and discharge of a low-temperature area are completed is fully utilized, and a high-temperature refrigeration system is omitted.

Description

Technical Field

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

[0002] Cold storage is an application technology that stores cold energy below ambient temperature for later use. It is a supplement and adjustment to refrigeration technology and an economical and feasible way to coordinate the mismatch between supply and demand of cold energy in terms of time and intensity.

[0003] The refrigeration system of the cold storage includes a liquid supply device and a terminal. The liquid supply device includes: a refrigeration unit, a condenser, a siphon tank and a gas-liquid separator, etc. The refrigeration unit includes a compressor, an oil separator, an oil cooler, a liquid storage tank and other devices. The terminal includes an air cooler and a cold storage plate. The liquid supply device compresses and condenses the gaseous refrigerant to obtain a liquid refrigerant to supply to the terminal. During the valley electricity price period, the liquid supply device provides two parts of cold energy, one part is used to cool the cold storage through the air cooler, and the other part is used to store cold energy through the cold storage process of the cold storage plate. During peak electricity consumption periods, the liquid supply device and the air cooler can stop working, and the cold storage is cooled by the process of releasing cold energy through the cold storage plate.

[0004] At present, cold storage plates are generally installed at the air outlet of the air cooler or on the walls around the cold storage. When the cold storage plates release cold, it will cause uneven temperature distribution in the cold storage. If the cold storage is divided into a low-temperature zone and a high-temperature zone, it is necessary to set up a low-temperature refrigeration system and a high-temperature refrigeration system respectively, and control the refrigeration, cold storage and cold release of each area respectively, which is costly. In addition, the above-mentioned cold storage and release control scheme cannot fully utilize the cold capacity of the refrigerant during peak and valley periods, and cannot achieve the best economy.

[0005] With regard to the problem that the refrigeration system of cold storage in the prior art cannot fully utilize the cooling capacity, resulting in poor economic efficiency, no effective solution has been proposed so far. Summary of the invention

[0006] Embodiments of the present invention provide a refrigeration system, a refrigeration control method, an electronic device and a storage medium, so as to at least solve the problem in the prior art that the refrigeration system of a cold storage cannot fully utilize the cold capacity, resulting in poor economy.

[0007] In order to solve the above technical problems, an embodiment of the present invention provides a refrigeration system, which is applied to a cold storage, wherein the cold storage includes a low temperature zone and a high temperature zone, and the refrigeration system includes:

[0008] A liquid supply device, used for compressing and condensing the refrigerant to output the refrigerant liquid;

[0009] A cooling fan, located in the low temperature zone and connected to the liquid supply device to form a refrigeration circuit;

[0010] At least one low-temperature zone cold storage plate is installed on at least one shelf in the low-temperature zone in a one-to-one correspondence, and the low-temperature zone cold storage plate is connected to the liquid supply device to form a cold storage circuit;

[0011] At least one high-temperature zone cold storage plate is installed one-to-one on at least one shelf in the high-temperature zone. The low-temperature zone cold storage plate is connected to the high-temperature zone cold storage plate through a coolant pipeline to form a coolant circuit. The cold energy of the low-temperature zone cold storage plate is delivered to the high-temperature zone cold storage plate through the coolant circuit for cold storage or cooling.

[0012] Optionally, in the refrigerant circuit, all low-temperature zone cold storage plates are connected in sequence, and all high-temperature zone cold storage plates are connected in sequence; or, all low-temperature zone cold storage plates are divided into at least two low-temperature cold storage groups, and all high-temperature zone cold storage plates are divided into at least two high-temperature cold storage groups, and the low-temperature cold storage groups correspond to the high-temperature cold storage groups one by one, and any low-temperature cold storage group is connected to its corresponding high-temperature cold storage group to form a refrigerant circuit, in which the low-temperature zone cold storage plates in the low-temperature cold storage group are connected in sequence, and the high-temperature zone cold storage plates in the high-temperature cold storage group are connected in sequence.

[0013] Optionally, a driving pump is provided in the coolant circuit.

[0014] Optionally, a coolant valve is provided on the coolant pipeline between any two directly connected low-temperature zone cold storage plates and high-temperature zone cold storage plates.

[0015] Optionally, the coolant valve is a one-way valve.

[0016] Optionally, the low-temperature zone cold storage plate and the high-temperature zone cold storage plate both include: a cold storage agent inlet, a cold storage agent outlet, a refrigerant inlet, a refrigerant outlet, a coolant inlet and a coolant outlet.

[0017] Optionally, both the low-temperature zone cold storage plate and the high-temperature zone cold storage plate adopt phase change cold storage, and the solution ratio of the cold storage agent is configured according to the required cooling temperature and cold storage temperature.

[0018] Optionally, a first liquid supply valve is provided on the connecting pipeline between the outlet of the liquid supply device and the low-temperature zone cold storage plate.

[0019] Optionally, a second liquid supply valve is provided on the connecting pipeline between the outlet of the liquid supply device and the cold air blower.

[0020] The embodiment of the present invention further provides a refrigeration control method, which is applied to the refrigeration system described in the embodiment of the present invention, and the method includes:

[0021] Determine the current electricity price period and monitor the temperature in the low temperature zone;

[0022] During the valley electricity price period, when the temperature of the low temperature zone is less than or equal to the upper limit of the valley electricity price temperature, the cold storage plate is controlled to store cold;

[0023] During the peak electricity price period, when the temperature of the low temperature zone is greater than the peak electricity price temperature upper limit, the low temperature zone cold storage plate cools down, and the remaining cold energy of the low temperature zone cold storage plate is sent to the high temperature zone cold storage plate for further cooling through the coolant circuit.

[0024] Optionally, controlling the cold storage plate to store cold includes:

[0025] Keep the cooling fan, the second liquid supply valve and the liquid supply device open;

[0026] Opening the first liquid supply valve to allow the low temperature zone cold storage plate to store cold;

[0027] When the cold storage plate in the low temperature zone has completed cold storage, the coolant valve on the coolant circuit is opened to allow the cold in the low temperature zone to flow to the high temperature zone through the coolant pipeline to store cold in the high temperature zone coolant plate;

[0028] When the high temperature zone cold storage plate completes cold storage, the first liquid supply valve and the coolant valve are closed.

[0029] Optionally, the cold storage plate in the low temperature zone is cooled, and the remaining cold of the cold storage plate in the low temperature zone is sent to the cold storage plate in the high temperature zone for further cooling through a coolant circuit, including:

[0030] Turn off the cooling fan, the second liquid supply valve and the liquid supply device;

[0031] The low-temperature zone cold storage plate cools when its cooling temperature is lower than the low-temperature zone temperature, and the high-temperature zone cold storage plate cools when its cooling temperature is lower than the high-temperature zone temperature;

[0032] When the low-temperature zone cold storage plate reaches the cooling limit, the coolant valve on the coolant circuit is opened to allow the remaining cold capacity in the low-temperature zone to flow to the high-temperature zone through the coolant pipeline and continue to cool through the high-temperature zone cold storage plate. When the high-temperature zone cold storage plate reaches the cooling limit, the coolant valve is closed;

[0033] Afterwards, if the temperature in the low temperature zone is still greater than the upper limit of the peak electricity price temperature, the cooling fan, the second liquid supply valve and the liquid supply device are turned on.

[0034] Optionally, the method also includes: during the flat electricity price period, when the temperature of the low temperature zone is greater than the upper limit of the flat electricity price temperature, turning on the cold air fan, the second liquid supply valve and the liquid supply device; when the temperature of the low temperature zone is less than or equal to the upper limit of the flat electricity price temperature, turning off the cold air fan, the second liquid supply valve and the liquid supply device.

[0035] An embodiment of the present invention further provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in the embodiment of the present invention when executing the computer program.

[0036] The embodiment of the present invention further provides a non-volatile computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the embodiment of the present invention are implemented.

[0037] By applying the technical solution of the present invention, cold storage plates in the low-temperature zone and cold storage plates in the high-temperature zone are arranged, and they are respectively installed on the shelves in the corresponding temperature zones in a one-to-one correspondence. The cooling of the cold storage plates can effectively improve the uneven temperature of the cold storage; the cold storage plates in the low-temperature zone are connected to the liquid supply device to form a cold storage circuit, and the cold storage plates in the low-temperature zone can be directly cooled by the liquid supply device; a coolant is added to the cold storage plates, and the cold storage plates in the low-temperature zone are connected to the cold storage plates in the high-temperature zone through a coolant pipeline to form a coolant circuit, and the unused cold of the cold storage plates in the low-temperature zone is sent to the cold storage plates in the high-temperature zone for cooling or cooling through the coolant circuit, without affecting the solid-liquid phase change of the coolant in the low-temperature zone , to ensure the circulation of cold capacity in high and low temperature zones, the excess cold capacity after the cold storage plate in the low temperature zone is completed can be used to store cold in the cold storage plate in the high temperature zone, and the remaining cold capacity after the cold storage plate in the low temperature zone is completed can be used to continue to release cold in the cold storage plate in the high temperature zone. Through the linkage of cold storage and release in high and low temperature zones, the utilization method of the cold storage capacity of the cold storage plate is optimized, and the excess cold capacity after the cold storage and release in the low temperature zone is fully utilized and allocated to avoid waste of cold capacity. The high temperature zone relies on the cold storage plate for cooling, and there is no need to set up a refrigeration system separately for the high temperature zone, which eliminates the high temperature refrigeration system, reduces costs, and solves the problem that the cold storage refrigeration system in the prior art cannot fully utilize the cold capacity, resulting in poor economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of a refrigeration system provided by an embodiment of the present invention;

[0039] Figure 2 is a schematic diagram of a liquid supply device provided by an embodiment of the present invention;

[0040] Figure 3 It is a schematic diagram of installing a cold storage plate in a cold storage provided by an embodiment of the present invention;

[0041] Figure 4 is a schematic structural diagram of a cold storage plate provided in an embodiment of the present invention;

[0042] Figure 5 is a flow chart of a refrigeration control method provided by an embodiment of the present invention;

[0043] Figure 6 is a refrigeration control flow chart provided by an embodiment of the present invention;

[0044] Description of reference numerals:

[0045] Liquid supply device 10, air cooler 20, low temperature zone cold storage plate 30, high temperature zone cold storage plate 40, shelf 50, warehouse body 60, refrigeration unit 11, condenser 12, siphon tank 13, gas-liquid separator 14, first liquid supply valve 31, second liquid supply valve 21, and coolant valve 41. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present invention 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 interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0048] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0049] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0051] Example 1

[0052] This embodiment provides a refrigeration system, which is applied to a cold storage, wherein the cold storage includes a low temperature zone and a high temperature zone, wherein the temperature of the low temperature zone is lower than that of the high temperature zone, for example, the temperature of the low temperature zone is -20°C to -18°C, and the temperature of the high temperature zone is 0°C to 5°C. At least one shelf is provided in the low temperature zone, and at least one shelf is provided in the high temperature zone, and items can be placed in the low temperature zone or the high temperature zone according to storage requirements of the items.

[0053] Figure 1 Schematic diagram of a refrigeration system provided by an embodiment of the present invention. Figure 1 As shown, the refrigeration system includes: a liquid supply device 10, a cold air blower 20, a low temperature zone cold storage plate 30 and a high temperature zone cold storage plate 40. The cold air blower 20, the low temperature zone cold storage plate 30 and the high temperature zone cold storage plate 40 are all used as the end of the refrigeration system.

[0054] The liquid supply device 10 is used to compress and condense the refrigerant to output the refrigerant liquid to supply the air cooler 20 and / or the low temperature zone cold storage plate 30. The outlet of the liquid supply device 10 is connected to the liquid supply pipe, and the inlet of the liquid supply device 10 is connected to the return air pipe.

[0055] The air cooler 20 is located in the low temperature zone, and the air cooler 20 is connected to the liquid supply device 10 to form a refrigeration circuit, that is, the refrigerant inlet of the air cooler 20 is connected to the liquid supply pipe of the liquid supply device 10, and the refrigerant outlet of the air cooler 20 is connected to the return air pipe of the liquid supply device 10. The number of the air cooler 20 is at least one, and when two or more air coolers 20 are provided, these air coolers 20 are connected in parallel.

[0056] The number of the low temperature zone cold storage plate 30 is at least one, and the number of the high temperature zone cold storage plate 40 is at least one. Figure 3 At least one low-temperature zone cold storage plate 30 is installed in a one-to-one correspondence at at least one shelf 50 in the low-temperature zone, and at least one high-temperature zone cold storage plate 40 is installed in a one-to-one correspondence at at least one shelf 50 in the high-temperature zone.

[0057] The low temperature zone cold storage plate 30 is connected to the liquid supply device 10 to form a cold storage circuit, that is, the refrigerant inlet of the low temperature zone cold storage plate 30 is connected to the liquid supply pipe of the liquid supply device 10, and the refrigerant outlet of the low temperature zone cold storage plate 30 is connected to the return air pipe of the liquid supply device 10. When two or more low temperature zone cold storage plates 30 are provided, these low temperature zone cold storage plates 30 are connected to the liquid supply device 10 in parallel.

[0058] The low temperature zone cold storage plate 30 and the high temperature zone cold storage plate 40 are connected through a coolant pipeline to form a coolant loop, and the coolant loop sends the cold energy of the low temperature zone cold storage plate 30 to the high temperature zone cold storage plate 40 for cold storage or cooling.

[0059] In the present embodiment, a low temperature zone cold storage plate 30 and a high temperature zone cold storage plate 40 are arranged, which are respectively installed on the shelves of the corresponding temperature zones in a one-to-one correspondence. The cooling of the cold storage plate can effectively improve the uneven temperature of the cold storage; the low temperature zone cold storage plate 30 is connected with the liquid supply device 10 to form a cold storage circuit, and the low temperature zone cold storage plate 30 can be directly cooled by the liquid supply device 10; a coolant is added to the cold storage plate, and the low temperature zone cold storage plate 30 and the high temperature zone cold storage plate 40 are connected by a coolant pipeline to form a coolant circuit, and the unused cold of the low temperature zone cold storage plate 30 is sent to the high temperature zone cold storage plate 40 for cold storage or cooling through the coolant circuit, without affecting the solid-liquid phase change of the coolant in the low temperature zone Under this circumstance, the circulation of cold capacity in high and low temperature zones is guaranteed, the excess cold capacity after the cold storage plate 30 in the low temperature zone is completed can be used to store cold in the cold storage plate 40 in the high temperature zone, and the excess cold capacity after the cold storage plate 30 in the low temperature zone is completed can be used to continue to release cold in the cold storage plate 40 in the high temperature zone. Through the linkage of cold storage and release in high and low temperature zones, the utilization mode of the cold storage capacity of the cold storage plate is optimized, the excess cold capacity after the cold storage and release in the low temperature zone is fully utilized and allocated, and the waste of cold capacity is avoided. The high temperature zone relies on the cold storage plate for cooling, and there is no need to set up a refrigeration system separately for the high temperature zone, thus eliminating the high temperature refrigeration system, reducing costs, and solving the problem that the cold storage refrigeration system in the prior art cannot fully utilize the cold capacity, resulting in poor economy.

[0060] like Figure 2 As shown, the liquid supply device 10 includes: a refrigeration unit 11, a condenser 12, a siphon tank 13 and a gas-liquid separator 14. The refrigeration unit 11 includes a compressor, an oil separator, an oil cooler, a liquid storage device and other components, and the condenser 12 can be an evaporative condenser. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor enters the condenser 12 after passing through the oil separator, is cooled in the condenser 12, and then flows into the siphon tank 13 (which plays the role of liquid separation in the low-temperature refrigeration system) through the liquid downpipe. The output of the siphon tank 13 is divided into two branches: one branch overflows into the liquid storage tank in the refrigeration unit 11, and then enters the gas-liquid separator 14 for supercooling and is supplied to the air cooler 20 and / or the low-temperature zone cold storage plate 30 through the liquid supply pipe. The refrigerant after evaporation at the end enters the gas-liquid separator 14 through the return gas pipe, and the separated gaseous refrigerant returns to the compressor. The separated liquid refrigerant is stored in the gas-liquid separator 14 to avoid liquid hammer in the compressor caused by incomplete evaporation of the end refrigerant; the other branch flows out from the bottom of the siphon tank 13, and is separated into the oil cooler of the refrigeration unit 11 under the action of gravity. In the oil cooler, the high-pressure and medium-temperature refrigerant liquid exchanges heat with the compressor lubricating oil to ensure the cooling of the lubricating oil. The liquid refrigerant absorbs heat from the lubricating oil and becomes gas, and then returns to the condenser 12 to be re-condensed.

[0061] The specific connection of the refrigerant circuit can be any of the following methods:

[0062] (1) In the coolant circuit, all the low temperature zone cold storage plates 30 are connected in sequence, and all the high temperature zone cold storage plates 40 are connected in sequence, that is, all the cold storage plates as a whole constitute a coolant circuit, refer to Figure 1 This connection method of the refrigerant circuit is easy to control.

[0063] (2) All low-temperature zone cold storage plates 30 are divided into at least two low-temperature cold storage groups, and all high-temperature zone cold storage plates 40 are divided into at least two high-temperature cold storage groups. The low-temperature cold storage groups correspond to the high-temperature cold storage groups one by one. Any low-temperature cold storage group is connected to its corresponding high-temperature cold storage group to form a refrigerant loop. In the refrigerant loop, the low-temperature zone cold storage plates in the low-temperature cold storage group are connected in sequence, and the high-temperature zone cold storage plates in the high-temperature cold storage group are connected in sequence. In other words, they can be grouped to form a plurality of refrigerant loops, and each refrigerant loop can be controlled separately.

[0064] In method (2), each low-temperature cold storage group includes at least one low-temperature zone cold storage plate, and each high-temperature cold storage group includes at least one high-temperature zone cold storage plate. The loads of the corresponding low-temperature cold storage group and the high-temperature cold storage group are matched to ensure that the unused cooling capacity of the low-temperature cold storage group can meet the cooling capacity demand of the corresponding high-temperature cold storage group. Figure 3 , the low-temperature cold storage group and its corresponding high-temperature cold storage group can be divided according to the position of the shelf 50. For example, the cold storage plates corresponding to the low-temperature area shelf and the high-temperature area shelf on the same layer constitute a coolant loop. This connection method of the coolant loop is more targeted and can make fuller use of the cooling capacity.

[0065] A driving pump can be provided in the refrigerant circuit to provide circulation power for the refrigerant, which is conducive to full utilization of cooling capacity. When cooling capacity needs to be transported from the low temperature area to the high temperature area, the driving pump is turned on, and when cooling capacity does not need to be transported from the low temperature area to the high temperature area, the driving pump is turned off.

[0066] A coolant valve 41 is provided on the coolant pipeline between any two directly connected low-temperature zone cold storage plates and high-temperature zone cold storage plates. When it is necessary to transport cold energy from the low-temperature zone to the high-temperature zone, the coolant valve 41 is opened, and when it is not necessary to transport cold energy from the low-temperature zone to the high-temperature zone, the coolant valve 41 is closed. In this embodiment, the coolant valve 41 is provided to control the circulation of the coolant between the high and low temperature zones.

[0067] Preferably, the refrigerant valve 41 is a one-way valve. The conduction direction of the one-way valve needs to ensure that the refrigerant in the refrigerant circuit can circulate and transport the cold from the low temperature area to the high temperature area. In this embodiment, the refrigerant valve 41 is a one-way valve, which can prevent the refrigerant from flowing back.

[0068] like Figure 4As shown, the low-temperature zone cold storage plate 30 and the high-temperature zone cold storage plate 40 both include: a coolant inlet, a coolant outlet, a refrigerant inlet, a refrigerant outlet, a coolant inlet and a coolant outlet to connect the corresponding coolant inlet pipe, coolant outlet pipe, refrigerant inlet pipe, refrigerant outlet pipe, coolant inlet pipe and coolant outlet pipe.

[0069] The present embodiment adopts a three-pipe cold storage plate and adds a coolant channel. The working fluids that can flow in the cold storage plate are refrigerant, coolant and coolant. The refrigerant is circulated to cause the coolant in the cold storage plate to change phase, thereby storing cold. The coolant can be released through the phase change of the coolant. The coolant can flow between the low-temperature zone cold storage plate 30 and the high-temperature zone cold storage plate 40 to transport the unused cold in the low-temperature zone cold storage plate to the high-temperature zone for cold storage or release. This avoids the situation where the coolant changes from liquid to solid during cold storage, resulting in the inability to flow cold from the low-temperature zone to the high-temperature zone. Without affecting the solid-liquid phase change in the low-temperature zone, the fluidity of the cold in the high and low-temperature zones is guaranteed, the linkage of cold storage and release in the high and low-temperature zones is achieved, and the cold storage plate is more fully utilized.

[0070] The low temperature zone cold storage plate 30 and the high temperature zone cold storage plate 40 both use phase change cold storage, and the solution ratio of the cold storage agent is configured according to the required cooling temperature and cold storage temperature. According to the storage temperature requirements, the corresponding temperature values ​​are set for the peak electricity price, the flat electricity price and the valley electricity price, that is, the peak electricity price temperature upper limit T 峰 , the upper limit of the temperature of the flat electricity price T 平 The upper limit of the valley electricity price temperature T 谷 , T 峰 >T 平 >T 谷 According to T 峰 and T 谷 To set the cooling temperature and cold storage temperature. The cold storage agent can be a eutectic salt solution with a certain ratio. The solution ratio of the cold storage agent is configured according to the required cooling temperature and cold storage temperature. The cold storage agent can form different phase change temperatures according to different solution ratios. The cold storage plate cools according to the phase change temperature, that is, when the ambient temperature of the cold storage plate is greater than the cooling temperature of the cold storage plate, the cold storage plate cools. The configured solution is filled into the cold storage plate as the cold storage agent through the cold storage agent inlet. When it is necessary to change the solution ratio of the cold storage agent, the cold storage agent in the cold storage plate can be discharged through the cold storage agent outlet, and new cold storage agent can be filled through the cold storage agent inlet. This embodiment can configure the solution ratio of the cold storage agent according to demand to obtain the required phase change temperature, and can replace the cold storage agent according to demand, so that cold storage refrigeration can be achieved more economically.

[0071] A first liquid supply valve 31 is provided on the connecting pipeline between the outlet of the liquid supply device 10 and the low temperature zone cold storage plate 30. The first liquid supply valve 31 is opened during cold storage so that the liquid supply device 10 provides cold to the cold storage plate. When cold storage is completed, the first liquid supply valve 31 is closed. In this embodiment, cold storage can be controlled by the first liquid supply valve 31.

[0072] A second liquid supply valve 21 is provided on the connecting pipeline between the outlet of the liquid supply device 10 and the air cooler 20. When the air cooler 20 is used for cooling, the second liquid supply valve 21 is opened so that the liquid supply device 10 provides cooling to the air cooler 20. When the air cooler 20 is not needed for cooling, the second liquid supply valve 21 is closed. In this embodiment, the second liquid supply valve 21 can be used to control whether the air cooler 20 is used for cooling the cold storage.

[0073] The first liquid supply valve 31 and the second liquid supply valve 21 can use valves with on-off control functions such as solenoid valves.

[0074] Example 2

[0075] This embodiment provides a refrigeration control method, which is applied to the refrigeration system described in the above embodiment. Figure 5 is a flow chart of a refrigeration control method provided by an embodiment of the present invention. Figure 5 As shown, the method comprises the following steps:

[0076] S501, determine the current electricity price period and monitor the temperature in the low temperature zone.

[0077] S502, during the valley electricity price period, when the temperature in the low temperature zone is less than or equal to the upper limit of the valley electricity price temperature, the cold storage plate is controlled to store cold.

[0078] S503, during the peak electricity price period, when the temperature of the low temperature zone is greater than the upper limit of the peak electricity price temperature, the cold storage plate in the low temperature zone cools down, and the remaining cold capacity of the cold storage plate in the low temperature zone is sent to the cold storage plate in the high temperature zone through the coolant circuit for further cooling.

[0079] This embodiment takes into account the electricity price period and monitors the temperature of the low temperature zone in real time. During the valley electricity price period and when the temperature of the low temperature zone is less than or equal to the upper limit of the valley electricity price temperature, the cold storage plate is controlled to store cold, ensuring that cold storage is performed while not affecting the refrigeration of the cold storage. During the peak electricity price period and when the temperature of the low temperature zone is greater than the upper limit of the peak electricity price temperature, the low temperature zone cold storage plate releases cold and sends the remaining cold of the low temperature zone cold storage plate to the high temperature zone cold storage plate through the coolant circuit for continued cooling. Peak and valley electricity prices are used to implement cooling capacity allocation, and the temperature of the low-temperature zone is used as the judgment node to control cold storage and cooling, so that cold storage and cooling response is rapid, and the control logic response is faster, so as to achieve more accurate and rapid control of cold storage and cooling, and avoid drastic fluctuations in storage temperature due to frequent cold storage in and out of the cold storage; and ensure that the cold storage plate only stores cold during the valley electricity price period and only releases cold during the peak electricity price period. At the same time, the excess cold after the cold storage in the low-temperature zone is completed can be transported to the high-temperature zone for cold storage, and the remaining cold after the low-temperature zone is released can be transported to the high-temperature zone for secondary cooling, so as to make full use of the cold capacity, without the need to set up a refrigeration system for the high-temperature zone separately, thus eliminating the need for a high-temperature refrigeration system, reducing costs, achieving system economic optimization, and solving the problem that the cold storage refrigeration system in the prior art cannot make full use of the cold capacity, resulting in poor economy.

[0080] In this embodiment, corresponding temperature thresholds can be set for different electricity price periods, specifically setting the upper temperature limit for valley electricity price, the upper temperature limit for peak electricity price, and the upper temperature limit for flat electricity price. If the temperature of the low temperature zone of the cold storage in any electricity price period is greater than the upper temperature limit for the electricity price period, it means that the temperature of the cold storage is too high and needs to be refrigerated. The upper temperature limit for peak electricity price> the upper temperature limit for flat electricity price> the upper temperature limit for valley electricity price. Through such settings, a certain energy-saving effect can also be achieved.

[0081] In one embodiment, the cold storage plate is controlled to store cold, including: keeping the cold air blower 20, the second liquid supply valve 21 and the liquid supply device 10 open; opening the first liquid supply valve 31 to allow the low-temperature zone cold storage plate 30 to store cold; when the low-temperature zone cold storage plate 30 completes cold storage, opening the refrigerant valve 41 on the refrigerant circuit to allow the cold in the low-temperature zone to flow to the high-temperature zone through the refrigerant pipeline to store cold in the high-temperature zone cold storage plate 40; when the high-temperature zone cold storage plate 40 completes cold storage, closing the first liquid supply valve 31 and the refrigerant valve 41, and the cold storage circuit stops the flow of refrigerant.

[0082] When the coolant liquid inside the cold storage plate is completely converted into solid, it can be considered that the cold storage plate has reached the upper limit of cold storage and cold storage is completed. Specifically, whether cold storage is completed can be determined by detecting the liquid level inside the cold storage plate or detecting the solid-liquid state.

[0083] In the off-peak electricity price period, when the temperature in the low-temperature zone meets the requirements, the present embodiment maintains the normal operation and cooling of the air cooler 20, and at the same time, the cold storage plate 30 in the low-temperature zone starts to store cold first (at this time, the first liquid supply valve 31 is opened and the coolant valve 41 remains closed). When the cold storage plate 30 in the low-temperature zone completes the cold storage, the coolant valve 41 is opened and the first liquid supply valve 31 remains open, so that the cold in the low-temperature zone flows to the high-temperature zone through the coolant, and the cold storage plate 40 in the high-temperature zone stores cold. This ensures that cold is stored only during the off-peak electricity price period, saving electricity, and the excess cold that is not fully utilized in the low-temperature zone is used to store cold in the high-temperature zone, thereby achieving full utilization of the cold and further ensuring economy.

[0084] In one embodiment, the cold storage plate in the low temperature zone cools down, and the remaining cold capacity of the cold storage plate in the low temperature zone is sent to the cold storage plate in the high temperature zone for further cooling through the coolant loop, including: closing the air cooler 20, the second liquid supply valve 21 and the liquid supply device 10; the cold storage plate 30 in the low temperature zone cools down when its cooling temperature is lower than the temperature in the low temperature zone, and the cold storage plate 40 in the high temperature zone cools down when its cooling temperature is lower than the temperature in the high temperature zone; when the cold storage plate 30 in the low temperature zone reaches the cooling limit, the coolant valve 41 on the coolant loop is opened, so that the remaining cold capacity in the low temperature zone flows to the high temperature zone through the coolant pipeline and continues to cool through the cold storage plate 40 in the high temperature zone; when the cold storage plate 40 in the high temperature zone reaches the cooling limit, the coolant valve 41 is closed; thereafter, if the temperature in the low temperature zone is still higher than the upper limit of the peak electricity price temperature, the air cooler 20, the second liquid supply valve 21 and the liquid supply device 10 are opened. During the cooling process, the first liquid supply valve 31 remains closed.

[0085] The cooling stage of the cold storage plate is a phase change process from solid to liquid. When the solid coolant is completely converted into liquid coolant, it can be considered that the cold storage plate has reached the cooling limit and the cooling is over. The cooling state of the cold storage plate can be determined by detecting the liquid level or solution volume inside the cold storage plate.

[0086] In the present embodiment, during the peak electricity price period, when the temperature in the low temperature zone does not meet the requirements, the cold storage plate is used for cooling first. At this time, the air cooler 20 and the liquid supply device 10 stop running and do not provide cooling. When the cold storage plate 30 in the low temperature zone reaches the cooling limit, if the temperature in the low temperature zone still does not meet the requirements, the air cooler 20 and the liquid supply device 10 are turned on to provide cooling; at the same time, the refrigerant valve 41 is opened to transport the remaining unused cold of the cold storage plate in the low temperature zone to the high temperature zone through the refrigerant for continued cooling, so that the cold capacity can be fully utilized, thereby ensuring that the cold storage plate stores cold during the valley electricity price period and cools during the peak electricity price period, thereby achieving energy saving, and the cold capacity of the cold storage plate after cooling in the low temperature zone is transported to the high temperature zone for secondary cooling, thereby fully utilizing the cold capacity and eliminating the high temperature refrigeration system, thereby achieving the optimal system economy.

[0087] In one embodiment, the above method also includes: during the flat electricity price period, when the temperature in the low temperature zone is greater than the upper limit of the flat electricity price temperature, turning on the cold air fan 20, the second liquid supply valve 21 and the liquid supply device 10; when the temperature in the low temperature zone is less than or equal to the upper limit of the flat electricity price temperature, turning off the cold air fan 20, the second liquid supply valve 21 and the liquid supply device 10.

[0088] This embodiment monitors the temperature of the low temperature zone during the flat electricity price period, and controls the start and stop of the cooling fan 20 according to the temperature of the low temperature zone. During the flat electricity price period, the control of cold storage and cold release is not involved, thereby effectively utilizing the peak and valley electricity prices to allocate cold capacity to achieve energy saving.

[0089] The above refrigeration control method is described below in conjunction with a specific embodiment. However, it is worth noting that this specific embodiment is only for better illustrating the present application and does not constitute an improper limitation on the present application. The explanation of terms that are the same or corresponding to the above embodiment will not be repeated in this embodiment.

[0090] like Figure 6 As shown, the refrigeration control process includes the following steps:

[0091] S601, the unit operates normally, that is, the liquid supply device 10, the air cooler 20 and the second liquid supply valve 21 are all turned on, and the air cooler 20 provides cooling.

[0092] S602, determine whether it is currently in the flat electricity price period, if so, proceed to S603, if not, proceed to S606.

[0093] S603, monitoring the temperature T in the low temperature zone.

[0094] S604, determine whether T>the upper limit of the flat electricity price temperature is satisfied, if so, return to S601, if not, enter S605.

[0095] S605, the unit stops running, that is, the liquid supply device 10, the air cooler 20 and the second liquid supply valve 21 are all closed, and the air cooler 20 does not provide cooling. Return to S602 to continue to determine the electricity price period.

[0096] S606, determine whether it is currently in the off-peak electricity price period, if so, proceed to S607, if not, proceed to S616.

[0097] S607, maintaining normal operation of the unit, that is, the air cooler 20 continues to provide cooling.

[0098] S608, monitoring the temperature T in the low temperature zone.

[0099] S609, determine whether T>the upper limit of the valley electricity price temperature is satisfied, if so, return to S607, if not, enter S610.

[0100] S610, judging whether the low temperature zone cold storage plate 30 has reached its cold storage upper limit, if so, proceeding to S612, if not, proceeding to S611.

[0101] S611, open the first liquid supply valve 31 to start cold storage.

[0102] S612, cold storage in the low temperature area ends.

[0103] S613, if it is still in the off-peak electricity price period, open the coolant valve 41 of the coolant circuit, the coolant transports the cold energy of the cold storage plate in the low-temperature area to the high-temperature area, and the first liquid supply valve 31 remains open.

[0104] S614, determine whether the high temperature zone cold storage plate 40 has reached its cold storage upper limit, if so, proceed to S615, if not, return to S613 to continue cold storage.

[0105] S615, close the first liquid supply valve 31 and the coolant valve 41 of the coolant circuit, and the cold storage in the high temperature area ends.

[0106] S616, determining that the current period is a peak electricity price period, and monitoring the temperature T in the low temperature area.

[0107] S617, determine whether T>peak electricity price temperature upper limit is satisfied, if so, proceed to S618, if not, proceed to S605.

[0108] S618, the low temperature cold storage plate starts cooling, and the unit stops running, that is, the liquid supply device 10, the cold air blower 20 and the second liquid supply valve 21 are all closed, and the cold air blower 20 does not provide cooling. If the high temperature zone temperature is greater than the cooling temperature of the high temperature zone cold storage plate, the high temperature zone cold storage plate also cools.

[0109] S619, judging whether the low temperature zone cold storage plate 30 has reached its cooling limit, if so, proceeding to S621, if not, proceeding to S620.

[0110] S620, the low temperature zone cold storage plate continues to cool, and the first liquid supply valve 31 remains closed.

[0111] S621, open the coolant valve 41 of the coolant circuit, and the coolant transports the remaining cold energy of the cold storage plate in the low-temperature area to the high-temperature area.

[0112] S622, determine whether the high temperature zone cold storage plate 40 has reached its cooling limit, if so, proceed to S624, if not, proceed to S623.

[0113] S623, the high temperature zone cold storage plate 40 continues to cool.

[0114] S624, close the refrigerant valve 41 of the refrigerant circuit, and stop the flow of the refrigerant circuit.

[0115] S625, monitoring the temperature T in the low temperature zone.

[0116] S626, determine whether T>peak electricity price temperature upper limit is satisfied, if so, proceed to S627, if not, proceed to S605.

[0117] S627, the liquid supply device 10, the cooling fan 20 and the second liquid supply valve 21 are turned on, and the cooling fan 20 provides cooling. The process can also return to S602 to continue determining the electricity price period.

[0118] This embodiment optimizes the structure of the cold storage plate and its connection, and controls the cold storage and release based on the electricity price period and the temperature of the low-temperature zone. It can make full use of the cold capacity of the refrigerant during peak and valley periods and reduce the start-up time of the unit. The high-temperature zone can use the excess cold capacity of the cold storage plate in the low-temperature zone, eliminating the high-temperature refrigeration system, so that the cold storage refrigeration system achieves the best operating economy.

[0119] Example 3

[0120] This embodiment provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in the above embodiment when executing the computer program.

[0121] Example 4

[0122] This embodiment provides a non-volatile computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the above embodiment are implemented.

[0123] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A refrigeration system, applied to a cold storage, characterized in that: The cold storage includes a low temperature area and a high temperature area, and the refrigeration system includes: A liquid supply device, used for compressing and condensing the refrigerant to output the refrigerant liquid; A cooling fan, located in the low temperature zone and connected to the liquid supply device to form a refrigeration circuit; At least one low-temperature zone cold storage plate is installed on at least one shelf in the low-temperature zone in a one-to-one correspondence, and the low-temperature zone cold storage plate is connected to the liquid supply device to form a cold storage circuit; At least one high-temperature zone cold storage plate is installed in a one-to-one correspondence at at least one shelf in the high-temperature zone. The low-temperature zone cold storage plate is connected to the high-temperature zone cold storage plate through a coolant pipeline to form a coolant loop. The cold energy of the low-temperature zone cold storage plate is delivered to the high-temperature zone cold storage plate through the coolant loop for cold storage or cooling.

2. The refrigeration system according to claim 1, characterized in that: In the coolant circuit, all low-temperature zone cold storage plates are connected in sequence, and all high-temperature zone cold storage plates are connected in sequence; or, All low-temperature zone cold storage plates are divided into at least two low-temperature cold storage groups, and all high-temperature zone cold storage plates are divided into at least two high-temperature cold storage groups. The low-temperature cold storage groups correspond to the high-temperature cold storage groups one by one. Any low-temperature cold storage group is connected to its corresponding high-temperature cold storage group to form a coolant loop. In the coolant loop, the low-temperature zone cold storage plates in the low-temperature cold storage group are connected in sequence, and the high-temperature zone cold storage plates in the high-temperature cold storage group are connected in sequence.

3. The refrigeration system according to claim 1, characterized in that: A driving pump is arranged in the coolant circuit.

4. The refrigeration system according to claim 1, characterized in that: A coolant valve is provided on the coolant pipeline between any two directly connected low-temperature zone cold storage plates and high-temperature zone cold storage plates.

5. The refrigeration system according to claim 4, characterized in that: The refrigerant valve is a one-way valve.

6. The refrigeration system according to claim 1, characterized in that: The low temperature zone cold storage plate and the high temperature zone cold storage plate both include: a cold storage agent inlet, a cold storage agent outlet, a refrigerant inlet, a refrigerant outlet, a coolant inlet and a coolant outlet.

7. The refrigeration system according to any one of claims 1 to 6, characterized in that: The low temperature zone cold storage plate and the high temperature zone cold storage plate both adopt phase change cold storage, and the solution ratio of the cold storage agent is configured according to the required cooling temperature and cold storage temperature.

8. The refrigeration system according to any one of claims 1 to 6, characterized in that: A first liquid supply valve is arranged on a connecting pipeline between the outlet of the liquid supply device and the low temperature zone cold storage plate.

9. The refrigeration system according to any one of claims 1 to 6, characterized in that: A second liquid supply valve is arranged on the connecting pipeline between the outlet of the liquid supply device and the cooling fan.

10. A refrigeration control method, characterized in that: Applied to the refrigeration system according to any one of claims 1 to 9, the method comprising: Determine the current electricity price period and monitor the temperature in the low temperature zone; During the valley electricity price period, when the temperature of the low temperature zone is less than or equal to the upper limit of the valley electricity price temperature, the cold storage plate is controlled to store cold; During the peak electricity price period, when the temperature of the low temperature zone is greater than the peak electricity price temperature upper limit, the low temperature zone cold storage plate cools down, and the remaining cold energy of the low temperature zone cold storage plate is sent to the high temperature zone cold storage plate for further cooling through the coolant circuit.

11. The method according to claim 10, characterized in that Control the cold storage plate to store cold, including: Keep the cooling fan, the second liquid supply valve and the liquid supply device open; Opening the first liquid supply valve to allow the low temperature zone cold storage plate to store cold; When the cold storage plate in the low temperature zone has completed cold storage, the coolant valve on the coolant circuit is opened to allow the cold in the low temperature zone to flow to the high temperature zone through the coolant pipeline to store cold in the high temperature zone coolant plate; When the high temperature zone cold storage plate completes cold storage, the first liquid supply valve and the coolant valve are closed.

12. The method according to claim 10, characterized in that The cold storage plate in the low temperature zone cools down, and the remaining cold capacity of the cold storage plate in the low temperature zone is sent to the cold storage plate in the high temperature zone for further cooling through the coolant circuit, including: Turn off the cooling fan, the second liquid supply valve and the liquid supply device; The low-temperature zone cold storage plate cools when its cooling temperature is lower than the low-temperature zone temperature, and the high-temperature zone cold storage plate cools when its cooling temperature is lower than the high-temperature zone temperature; When the low-temperature zone cold storage plate reaches the cooling limit, the coolant valve on the coolant circuit is opened to allow the remaining cold capacity in the low-temperature zone to flow to the high-temperature zone through the coolant pipeline and continue to cool through the high-temperature zone cold storage plate. When the high-temperature zone cold storage plate reaches the cooling limit, the coolant valve is closed; Afterwards, if the temperature in the low temperature zone is still greater than the upper limit of the peak electricity price temperature, the cooling fan, the second liquid supply valve and the liquid supply device are turned on.

13. The method according to any one of claims 10 to 12, characterized in that The method further comprises: During the flat electricity price period, when the temperature of the low temperature zone is greater than the upper limit of the flat electricity price temperature, turn on the cold air fan, the second liquid supply valve and the liquid supply device; when the temperature of the low temperature zone is less than or equal to the upper limit of the flat electricity price temperature, turn off the cold air fan, the second liquid supply valve and the liquid supply device.

14. An electronic device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 10 to 13 when executing the computer program.

15. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 10 to 13 are implemented.

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