Refrigeration defrosting method, device, terminal and readable storage medium

Abstract

The present invention discloses a refrigeration defrosting method, device, terminal and readable storage medium. The refrigeration defrosting method includes the following steps: when it is determined that it is in the valley period, when Flag is true, control the defrosting system to perform defrosting operation; the shutdown temperature is set to a preset shutdown temperature, and when the refrigeration operation of the refrigeration system ends, control the defrosting system to perform defrosting operation; when it is determined that it is in the peak period or normal period at this time, adjust the shutdown temperature to be greater than the preset shutdown temperature. When the refrigeration operation ends, obtain the duration Time1 of this refrigeration operation. When Time1 < the minimum value of the durations of all refrigeration operations on the current day * α, Flag = true, otherwise, Flag = false; when Flag is false, control the defrosting system to perform defrosting operation. This refrigeration defrosting method can greatly reduce costs.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and in particular to a refrigeration defrosting method, apparatus, terminal, and readable storage medium. Background Technology

[0002] In practice, one pricing strategy of power grid companies is to divide the day into peak hours, normal hours, and off-peak hours, with higher electricity prices during peak and normal hours and lower prices during off-peak hours.

[0003] In existing technologies, the refrigeration strategy for cold storage is generally to alternate between refrigeration and defrosting operations. Understandably, this does not take full advantage of the price difference between peak and off-peak hours, thus failing to save costs. Summary of the Invention

[0004] In view of this, the main objective of the present invention is to provide a cooling defrosting method, apparatus, terminal, and readable storage medium.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows: a defrosting method for a cold storage facility, wherein the cold storage facility is equipped with a preset start-up temperature, a preset shutdown temperature, and a delayed defrosting flag (Flag); the cold storage facility is equipped with a refrigeration system and a defrosting system; when the temperature of the cold storage facility is greater than the preset start-up temperature, the refrigeration system begins refrigeration operation until the temperature of the cold storage facility is less than the shutdown temperature, the shutdown temperature is less than the preset start-up temperature, and the preset shutdown temperature is less than the preset start-up temperature; the method includes the following steps: when it is determined that the cold storage facility is in a low-temperature period, and when the Flag is true, the defrosting system is controlled to perform a defrosting operation; the shutdown temperature... The system is set to a preset shutdown temperature, and after the cooling operation of the refrigeration system ends, it waits for a first preset time before controlling the defrosting system to perform a defrosting operation. When it is determined that the current period is a peak or normal period, the shutdown temperature is adjusted to be higher than the preset shutdown temperature. After the cooling operation of the refrigeration system ends, the duration Time1 of this cooling operation is obtained. If Time1 < the minimum duration of all cooling operations on the day * α, Flag = true; otherwise, Flag = false. After waiting for the first preset time, if Flag is false, the defrosting system is controlled to perform a defrosting operation. Wherein, α > 1.

[0006] As an improvement to an embodiment of the present invention, the "controlling the defrosting system to perform defrosting operation" specifically includes: controlling the defrosting system to perform defrosting operation and continuing for a second preset time.

[0007] As an improvement to an embodiment of the present invention, the step of "adjusting the shutdown temperature to be greater than the preset shutdown temperature" specifically includes: when the preset power-on temperature - shutdown temperature > a first threshold, increasing the value of the shutdown temperature by a first preset amount, wherein 0 < the first preset amount < the first threshold ≤ the preset power-on temperature - preset shutdown temperature.

[0008] As an improvement of this embodiment of the invention, the first threshold value is 5 and the first preset quantity value is 2.

[0009] As an improvement to an embodiment of the present invention, the step of "adjusting the shutdown temperature to be greater than the preset shutdown temperature" specifically includes: when the second threshold < preset power-on temperature - shutdown temperature < first threshold, increasing the value of the shutdown temperature by a second preset amount, wherein 0 < second preset amount < first preset amount < second threshold < first threshold ≤ preset power-on temperature - preset shutdown temperature.

[0010] As an improvement to an embodiment of the present invention, the second threshold is 3.

[0011] As an improvement to an embodiment of the present invention, the second preset quantity value is 1.

[0012] This invention also provides a refrigeration defrosting device for a cold storage facility. The cold storage facility is equipped with a preset start-up temperature, a preset shutdown temperature, and a delayed defrosting flag (Flag). The cold storage facility includes a refrigeration system and a defrosting system. When the temperature of the cold storage facility is greater than the preset start-up temperature, the refrigeration system begins refrigeration operation until the temperature of the cold storage facility is less than the shutdown temperature, the shutdown temperature is less than the preset start-up temperature, and the preset shutdown temperature is less than the preset start-up temperature. The device includes the following modules: a first processing module, used to control the defrosting system to perform defrosting operation when it is determined that the system is in a low-temperature period and when the Flag is true; the shutdown temperature is set to the preset shutdown temperature. The system temperature is set, and when the cooling operation of the refrigeration system ends, a first preset time is waited before the defrosting system is controlled to perform a defrosting operation; the second processing module is used to adjust the shutdown temperature to be greater than the preset shutdown temperature when it is determined that the current period is a peak period or a normal period. When the cooling operation of the refrigeration system ends, the duration of this cooling operation, Time1, is obtained. When Time1 < the minimum duration of all cooling operations on the day * α, Flag = true; otherwise, Flag = false; the system waits for the first preset time, and when Flag is false, the defrosting system is controlled to perform a defrosting operation; where α > 1.

[0013] This invention also provides a terminal, including: a memory for storing a computer program; and a processor for executing the computer program to implement the steps of the cooling defrosting method as described above.

[0014] This invention also provides a readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the cooling defrosting method described above.

[0015] The defrosting method, apparatus, terminal, and readable storage medium provided in this invention have the following advantages: This invention discloses a defrosting method, apparatus, terminal, and readable storage medium. The defrosting method includes the following steps: When it is determined that the period is a low-lying time, if Flag is true, control the defrosting system to perform a defrosting operation; set the shutdown temperature to a preset shutdown temperature, and control the defrosting system to perform a defrosting operation when the refrigeration operation of the refrigeration system ends; when it is determined that the period is a peak time or a normal time, adjust the shutdown temperature to be higher than the preset shutdown temperature; when the refrigeration operation of the refrigeration system ends, obtain the duration Time1 of this refrigeration operation; if Time1 < the minimum duration of all refrigeration operations on that day * α, Flag = true; otherwise, Flag = false; when Flag is false, control the defrosting system to perform a defrosting operation. This defrosting method can greatly reduce costs. Attached Figure Description

[0016] Figure 1 This is a schematic flowchart of the cooling defrosting method in the embodiment. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0018] The following description and accompanying drawings fully illustrate specific embodiments described herein to enable those skilled in the art to practice them. Some embodiments may include or substitute parts and features of other embodiments. The scope of the embodiments herein encompasses the entire scope of the claims and all available equivalents thereof. Throughout this document, the terms “first,” “second,” etc., are used only to distinguish one element from another without requiring or implying any actual relationship or order between the elements. Indeed, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a structure, apparatus, or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the structure, apparatus, or device that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.

[0019] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this document to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the document and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description herein, unless otherwise specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0020] Embodiment 1 of the present invention provides a refrigeration and defrosting method for a cold storage. The cold storage is equipped with a preset start-up temperature, a preset shutdown temperature, and a delayed defrosting flag. The cold storage is equipped with a refrigeration system and a defrosting system. When the temperature of the cold storage is greater than the preset start-up temperature, the refrigeration system starts refrigeration operation until the temperature of the cold storage is less than the shutdown temperature, the shutdown temperature is less than the preset start-up temperature, and the preset shutdown temperature is less than the preset start-up temperature.

[0021] The cold storage facility includes storage space. A refrigeration system cools the storage space, and a defrosting system defrosts the storage space and / or the refrigeration system. An execution module, such as an MCU (Microcontroller Unit), PC (Personal Computer), or industrial computer, can be installed in the cold storage facility to execute the defrosting method. This execution module includes a memory that stores preset start-up temperature, preset shutdown temperature, and a delayed defrost flag (Flag). The delayed defrost flag can be set to true or false. Alternatively, the preset start-up temperature, preset shutdown temperature, and delayed defrost flag can also be stored on a cloud platform.

[0022] The working principle of this refrigeration system is as follows: a refrigeration evaporator pipe is installed in the storage space, and a fan motor is also installed in the storage space. When the compressor is working, the fan motor is also powered on and runs. The rotation of the fan causes airflow through the refrigeration evaporator pipe, thereby generating forced convection and transferring cold air to every corner of the storage space. Understandably, this refrigeration method can make the overall temperature of the storage space very uniform. However, due to the forced convection of the fan, moisture evaporates quickly. The evaporator used in the storage space is usually a finned evaporator, which is prone to frost buildup on the fins. Therefore, a heater is usually installed on the evaporator. The structure of the heater varies depending on the design, and the installation method and structure also differ, but its main function is to melt the frost on the evaporator. This heater and its control device can be considered as a defrosting system.

[0023] like Figure 1 As shown, it includes the following steps:

[0024] Step 101: When it is determined that the system is in a valley period, when Flag is true, control the defrosting system to perform a defrosting operation; the shutdown temperature is set to a preset shutdown temperature, and after the refrigeration operation of the refrigeration system ends, wait for a first preset time and control the defrosting system to perform a defrosting operation.

[0025] Step 102: When it is determined that the current period is a peak or normal period, adjust the shutdown temperature to be higher than the preset shutdown temperature. When the cooling operation of the refrigeration system ends, obtain the duration Time1 of this cooling operation. If Time1 < the minimum duration of all cooling operations on the day * α, Flag = true; otherwise, Flag = false. Wait for a first preset time. When Flag is false, control the defrosting system to perform a defrosting operation; where α > 1. Optionally, α = 1.5.

[0026] Here, when the cold storage is in peak or normal hours, the shutdown temperature can be adjusted to be higher than the preset shutdown temperature. Assuming that during peak or normal hours, the temperature of the cold storage is T1 when the refrigeration operation ends; and during off-peak hours, the temperature is T2, then T1 > T2. This means that during peak or normal hours, the energy consumed per refrigeration operation is lower, and the average temperature of the cold storage is higher than the average temperature during off-peak hours. In other words, during peak or normal hours, minimize refrigeration and refrigerant supply; during off-peak hours, maximize refrigeration and refrigerant supply to save costs as much as possible.

[0027] Furthermore, it's understandable that frost buildup on the fins will affect refrigerant dissipation, thus prolonging the cooling operation and necessitating defrosting. Additionally, higher temperatures in the cold storage will also extend the cooling operation time and lead to more frost buildup on the fins, requiring defrosting as well. During peak periods, at the end of each cooling operation, the duration of all cooling operations for the day (including the duration of the current operation) is retrieved. If the current cooling operation duration (Time1) is greater than or equal to the minimum duration of all cooling operations for the day multiplied by α, then Flage = false, meaning that after waiting for a first preset time, the defrosting operation begins immediately; otherwise, the defrosting operation is skipped.

[0028] When it is determined that the refrigeration period is in a trough, if Flag is true, it means that at least one defrosting operation was skipped during the peak period. In order to ensure the normal operation of the refrigeration system, the defrosting operation can be performed immediately.

[0029] Here, when it is in a valley period, the Flag can be reset to false, that is, the next defrost will not be postponed.

[0030] In this embodiment, "controlling the defrosting system to perform defrosting operation" specifically includes: controlling the defrosting system to perform defrosting operation and continuing for a second preset time.

[0031] In this embodiment, "adjusting the shutdown temperature to be greater than the preset shutdown temperature" specifically includes: when the preset power-on temperature - shutdown temperature > a first threshold, increasing the shutdown temperature by a first preset amount, where 0 < the first preset amount < the first threshold ≤ the preset power-on temperature - preset shutdown temperature. Here, when the preset power-on temperature - shutdown temperature > the first threshold, and the first threshold ≤ the preset power-on temperature - preset shutdown temperature, it can be considered that the shutdown temperature setting is somewhat low, and the shutdown temperature can be increased to save energy.

[0032] In this embodiment, the first threshold value is 5 and the first preset quantity value is 2.

[0033] In this embodiment, "adjusting the shutdown temperature to be greater than the preset shutdown temperature" specifically includes: when the second threshold < preset power-on temperature - shutdown temperature < first threshold, increasing the shutdown temperature by a second preset amount, where 0 < second preset amount < first preset amount < second threshold < first threshold ≤ preset power-on temperature - preset shutdown temperature. When the second threshold < preset power-on temperature - shutdown temperature < first threshold, the shutdown temperature is slightly low and can be slightly increased.

[0034] In this embodiment, the second threshold is 3.

[0035] In this embodiment, the second preset quantity value is 1.

[0036] Embodiment 2 of the present invention provides a refrigeration defrosting device for a cold storage facility. The cold storage facility is equipped with a preset start-up temperature, a preset shutdown temperature, and a delayed defrosting flag. The cold storage facility contains a refrigeration system and a defrosting system. When the temperature of the cold storage facility is greater than the preset start-up temperature, the refrigeration system begins refrigeration operation until the temperature of the cold storage facility is less than the shutdown temperature, the shutdown temperature is less than the preset start-up temperature, and the preset shutdown temperature is less than the preset start-up temperature. The device includes the following modules:

[0037] The first processing module is used to control the defrosting system to perform defrosting operation when it is determined that the system is in a valley period and when Flag is true; the shutdown temperature is set to a preset shutdown temperature, and after the refrigeration operation of the refrigeration system ends, it waits for a first preset time and then controls the defrosting system to perform defrosting operation.

[0038] The second processing module is used to adjust the shutdown temperature to a level higher than the preset shutdown temperature when it is determined that the current period is a peak or normal period. When the cooling operation of the refrigeration system ends, the duration Time1 of this cooling operation is obtained. When Time1 < the minimum duration of all cooling operations on the day * α, Flag = true; otherwise, Flag = false. Wait for a first preset time. When Flag is false, control the defrosting system to perform a defrosting operation. Wherein, α > 1.

[0039] Embodiment 3 of the present invention provides a terminal, including: a memory for storing a computer program; and a processor for executing the computer program to implement the steps of the cooling defrosting method as described in Embodiment 1.

[0040] Embodiment 4 of the present invention provides a readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the cooling defrosting method as described in Embodiment 1.

[0041] It should be noted that although the steps are described in a specific order above, it does not mean that the steps must be executed in the above specific order. In fact, some of these steps can be executed concurrently, or even in a different order, as long as the required function can be achieved.

[0042] This invention can be a system, method, and / or computer program product. A computer program product may include a readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of the invention.

[0043] A readable storage medium can be a tangible device that holds and stores instructions for use by an instruction execution device. Readable storage media can include, for example, but not limited to, electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination thereof.

[0044] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A defrosting method for a cold storage facility, wherein the cold storage facility is equipped with a preset start-up temperature, a preset shutdown temperature, and a delayed defrosting flag; the cold storage facility is equipped with a refrigeration system and a defrosting system; when the temperature of the cold storage facility is greater than the preset start-up temperature, the refrigeration system begins refrigeration operation until the temperature of the cold storage facility is less than the shutdown temperature, the shutdown temperature is less than the preset start-up temperature, and the preset shutdown temperature is less than the preset start-up temperature; characterized in that... Includes the following steps: Step 1: When it is determined that the current period is a peak or normal period, adjust the shutdown temperature to be higher than the preset shutdown temperature. When the cooling operation of the refrigeration system ends, obtain the duration Time1 of this cooling operation. If Time1 < the minimum duration of all cooling operations on that day... When α is true, Flag = true; otherwise, Flag = false. Wait for a first preset time. When Flag is false, control the defrosting system to perform a defrosting operation; otherwise, do not perform a defrosting operation. Wherein, α >

1. Step 2: When it is determined that the system is in a valley period, and when Flag is true, control the defrosting system to perform defrosting operation; the shutdown temperature is set to the preset shutdown temperature, and after the refrigeration operation of the refrigeration system ends, wait for a first preset time and control the defrosting system to perform defrosting operation.

2. The defrosting method according to claim 1, characterized in that, The phrase "controlling the defrosting system to perform defrosting operations" specifically includes: The defrosting system is controlled to perform a defrosting operation for a second preset time.

3. The defrosting method according to claim 1, characterized in that, The phrase "adjusting the shutdown temperature to be higher than the preset shutdown temperature" specifically includes: When the preset power-on temperature minus the power-off temperature is greater than the first threshold, the value of the power-off temperature is increased by a first preset quantity, where 0 < the first preset quantity < the first threshold ≤ the preset power-on temperature minus the preset power-off temperature.

4. The defrosting method according to claim 3, characterized in that, First threshold = 5, first preset quantity value = 2.

5. The defrosting method according to claim 3, characterized in that, The phrase "adjusting the shutdown temperature to be higher than the preset shutdown temperature" specifically includes: When the second threshold < preset power-on temperature - power-off temperature < first threshold, the value of the power-off temperature is increased by a second preset quantity, wherein 0 < second preset quantity < first preset quantity < second threshold < first threshold ≤ preset power-on temperature - preset power-off temperature.

6. The defrosting method according to claim 5, characterized in that, The second threshold is 3.

7. The defrosting method according to claim 5, characterized in that, The second preset quantity value is 1.

8. A refrigeration and defrosting device for a cold storage facility, wherein the cold storage facility is equipped with a preset start-up temperature, a preset shutdown temperature, and a delayed defrosting flag; the cold storage facility is equipped with a refrigeration system and a defrosting system; when the temperature of the cold storage facility is greater than the preset start-up temperature, the refrigeration system begins refrigeration operation until the temperature of the cold storage facility is less than the shutdown temperature, the shutdown temperature is less than the preset start-up temperature, and the preset shutdown temperature is less than the preset start-up temperature; characterized in that... Includes the following modules: The second processing module is used to execute step 1: when it is determined that the current period is a peak period or a normal period, the shutdown temperature is adjusted to be higher than the preset shutdown temperature. When the cooling operation of the refrigeration system ends, the duration Time1 of this cooling operation is obtained. If Time1 < the minimum duration of all cooling operations on the same day... When α is true, Flag = true; otherwise, Flag = false. Wait for a first preset time. When Flag is false, control the defrosting system to perform a defrosting operation; otherwise, do not perform a defrosting operation. Wherein, α >

1. The first processing module is used to execute step 2: when it is determined that it is in a valley period, when Flag is true, control the defrosting system to perform defrosting operation; the shutdown temperature is set to a preset shutdown temperature, and when the refrigeration operation of the refrigeration system ends, wait for a first preset time and control the defrosting system to perform defrosting operation.

9. A terminal, characterized in that, include: Memory, used to store computer programs; A processor, configured to execute the computer program to implement the steps of the cooling defrosting method as described in any one of claims 1 to 7.

10. A readable storage medium, characterized in that, The readable storage medium stores a computer program that, when executed by a processor, implements the steps of the cooling defrosting method as described in any one of claims 1 to 7.

Images