Defrosting control method and device, refrigeration equipment and storage medium

Abstract

The embodiment of the invention relates to a defrosting control method and device, refrigeration equipment and a storage medium, and the method comprises the steps that the first air volume and the second air volume of an air outlet of an evaporator of the refrigeration equipment are obtained, the first air volume represents the air volume of the air outlet when the refrigeration equipment initially operates, and the second air volume represents the air volume of the air outlet when the refrigeration equipment initially operates; the second air volume represents the air volume of the air outlet when the refrigeration equipment operates in real time; controlling the refrigeration equipment to enter a defrosting mode according to the first air volume and the second air volume; in the defrosting process, the defrosting rate of the refrigeration equipment is calculated according to the second air volume; and controlling the refrigeration equipment to exit from the defrosting mode according to the defrosting rate, the first air volume and the second air volume. Therefore, the refrigeration equipment can be controlled to enter the defrosting mode by obtaining the real-time air volume change condition of the evaporator, the refrigeration equipment is controlled to exit from the defrosting mode according to the defrosting rate, accurate control over the defrosting mode and the defrosting process is achieved, and resource waste and performance reduction are avoided.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of refrigeration equipment, and in particular to a defrost control method, device, refrigeration equipment and storage medium. Background Art

[0002] With the national policy support for the refrigeration industry, the application of refrigeration has become more and more extensive. Condensing units have become an indispensable equipment in cold storage and play an important role in cold chain logistics. However, since condensing units usually work in a low temperature environment and run for a long time, the frosting problem becomes particularly serious.

[0003] At present, most condensing units use timed or temperature-based defrosting control methods, which are simple to operate, but have some defects: if the defrosting time is not set accurately, if the defrosting is terminated prematurely, it will lead to incomplete defrosting and the frosting problem will gradually worsen; if the defrosting time is too long, it will waste electricity and even cause the temperature of the cold storage to rise, affecting the preservation effect of food. Therefore, how to accurately control the defrosting of refrigeration equipment has become a problem that needs to be solved urgently. Summary of the invention

[0004] In view of this, in order to solve the above-mentioned technical problem of accurately performing defrost control, the embodiments of the present invention provide a defrost control method, device, refrigeration equipment and storage medium.

[0005] In a first aspect, an embodiment of the present invention provides a defrost control method, comprising:

[0006] Acquire a first air volume and a second air volume of an evaporator air outlet of a refrigeration device, wherein the first air volume represents the air volume of the air outlet when the refrigeration device is initially operated, and the second air volume represents the air volume of the air outlet when the refrigeration device is in real-time operation;

[0007] controlling the refrigeration device to enter a defrost mode according to the first air volume and the second air volume;

[0008] During the defrosting process, calculating the defrosting rate of the refrigeration equipment according to the second air volume;

[0009] The refrigeration device is controlled to exit the defrost mode according to the defrost rate, the first air volume, and the second air volume.

[0010] In a possible implementation manner, the first air volume and the second air volume are obtained by:

[0011] Determine a first enthalpy value of the refrigerant outlet according to a first pressure and a first temperature of the refrigerant outlet of the evaporator, and determine a second enthalpy value of the refrigerant outlet according to a second pressure and a second temperature of the refrigerant inlet of the evaporator;

[0012] determining a third enthalpy value of the air outlet according to the first humidity and the third temperature of the air outlet of the evaporator, and determining a fourth enthalpy value of the air outlet according to the second humidity and the fourth temperature of the air inlet of the evaporator;

[0013] The first air volume and the second air volume are determined according to the first enthalpy value, the second enthalpy value, the third enthalpy value and the fourth enthalpy value, as well as the refrigerant flow rate, the air specific volume and the moisture content of the air outlet.

[0014] In a possible implementation manner, controlling the refrigeration device to enter a defrost mode according to the first air volume and the second air volume includes:

[0015] When the continuous operation time of the refrigeration device reaches a first time length, the refrigerant outlet temperature is greater than a temperature threshold, and the second air volume is less than or equal to the first air volume, determining whether the second air volume is less than or equal to the first air volume threshold;

[0016] If the second air volume is less than or equal to the first air volume threshold, controlling the refrigeration device to enter a defrost mode;

[0017] If the second air volume is greater than the first air volume threshold, determining whether the second air volume is less than or equal to a second air volume threshold, where the second air volume threshold is the product of the first air volume and a first weight;

[0018] If the second air volume is less than or equal to the second air volume threshold, controlling the refrigeration device to enter a defrost mode;

[0019] If the second air volume is greater than the second air volume threshold, determining whether the second air volume is less than or equal to a third air volume threshold, wherein the third air volume threshold is the product of the first air volume and a second weight, and the second weight is less than the first weight;

[0020] If the second air volume is less than or equal to the third air volume threshold, the refrigeration device is controlled to enter a defrost mode.

[0021] In a possible implementation, the method further includes:

[0022] When the continuous operation time of the refrigeration equipment reaches a first time period, the refrigerant outlet temperature is greater than a temperature threshold, and the second air volume is greater than the first air volume, the first air volume is adjusted to be equal to the second air volume.

[0023] In a possible implementation manner, calculating the defrost rate of the refrigeration equipment according to the second air volume includes:

[0024] Obtaining a second air volume once every second time interval;

[0025] Each time a new second air volume is obtained, the historical second air volume obtained last time is divided by the new second air volume currently obtained to obtain the current defrosting rate.

[0026] In a possible implementation manner, controlling the refrigeration device to exit the defrost mode according to the defrost rate, the first air volume, and the second air volume includes:

[0027] When the duration of the defrost rate being greater than or equal to the first rate threshold is greater than the third duration, and the second air volume is greater than or equal to the fourth air volume threshold, the refrigeration device is controlled to exit the defrost mode, otherwise, the defrost mode is continued, and the fourth air volume threshold is the product of the first air volume and the third weight;

[0028] Or, when the defrost rate is greater than or equal to the first rate threshold and the duration is greater than a fourth duration, and the second air volume is greater than or equal to a fifth air volume threshold, the refrigeration device is controlled to exit the defrost mode, otherwise, the defrost mode is continued to be maintained, the fourth duration is greater than the third duration, the fifth air volume threshold is the product of the first air volume and a fourth weight, and the fourth weight is less than the third weight.

[0029] In a possible implementation, the method further includes:

[0030] When the second air volume is equal to the first air volume, controlling the refrigeration device to exit the defrost mode;

[0031] Or, when the current defrost time reaches the maximum defrost time, controlling the refrigeration device to exit the defrost mode;

[0032] Or, when the defrost rate is greater than or equal to the first rate threshold and the duration is longer than a fifth duration, the refrigeration device is controlled to exit the defrost mode, and the fifth duration is longer than the fourth duration.

[0033] In a second aspect, an embodiment of the present invention provides a defrost control device, comprising:

[0034] An acquisition module, used to acquire a first air volume and a second air volume of an evaporator air outlet of a refrigeration device, wherein the first air volume represents the air volume of the air outlet when the refrigeration device is initially operated, and the second air volume represents the air volume of the air outlet when the refrigeration device is in real-time operation;

[0035] a control module, configured to control the refrigeration device to enter a defrost mode according to the first air volume and the second air volume;

[0036] a calculation module, used for calculating the defrost rate of the refrigeration equipment according to the second air volume during the defrost process;

[0037] The control module is further used to control the refrigeration device to exit the defrost mode according to the defrost rate, the first air volume and the second air volume.

[0038] In a third aspect, an embodiment of the present invention provides a refrigeration device, comprising: a processor and a memory, wherein the processor is used to execute a defrost control program stored in the memory to implement the defrost control method described in any one of the first aspects above.

[0039] In a fourth aspect, an embodiment of the present invention provides a storage medium, wherein the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the defrost control method described in any one of the first aspects above.

[0040] The defrost control scheme provided by the embodiment of the present invention obtains the first air volume and the second air volume of the air outlet of the evaporator of the refrigeration equipment, wherein the first air volume represents the air volume of the air outlet when the refrigeration equipment is initially operated, and the second air volume represents the air volume of the air outlet when the refrigeration equipment is in real-time operation; the refrigeration equipment is controlled to enter the defrost mode according to the first air volume and the second air volume; during the defrost process, the defrost rate of the refrigeration equipment is calculated according to the second air volume; and the refrigeration equipment is controlled to exit the defrost mode according to the defrost rate, the first air volume, and the second air volume. Thus, the refrigeration equipment can be controlled to enter the defrost mode by obtaining the real-time air volume change of the evaporator, and the defrost mode can be controlled to exit according to the defrost rate, thereby realizing precise control of the defrost mode and the defrost process, and avoiding resource waste and performance degradation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic flow chart of a defrost control method provided by an embodiment of the present invention;

[0042] Figure 2 A schematic diagram of the structure of a refrigeration device provided by an embodiment of the present invention;

[0043] Figure 3 A schematic flow chart of another defrost control method provided by an embodiment of the present invention;

[0044] Figure 4 A schematic flow chart of another defrost control method provided by an embodiment of the present invention;

[0045] Figure 5 A structural schematic diagram of a defrost control device provided by an embodiment of the present invention;

[0046] Figure 6 A schematic structural diagram of a refrigeration device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] To facilitate understanding of the embodiments of the present invention, specific embodiments will be further explained below in conjunction with the accompanying drawings. The embodiments do not constitute a limitation on the embodiments of the present invention.

[0049] Figure 1 A schematic diagram of a defrost control method provided by an embodiment of the present invention is shown in FIG. Figure 1 The method shown specifically includes:

[0050] S11, obtaining a first air volume and a second air volume of an evaporator air outlet of a refrigeration device, wherein the first air volume represents the air volume of the air outlet when the refrigeration device is initially operated, and the second air volume represents the air volume of the air outlet when the refrigeration device is in real-time operation;

[0051] S12, controlling the refrigeration device to enter a defrost mode according to the first air volume and the second air volume;

[0052] S13, during the defrosting process, calculating the defrosting rate of the refrigeration equipment according to the second air volume;

[0053] S14. Controlling the refrigeration device to exit the defrost mode according to the defrost rate, the first air volume, and the second air volume.

[0054] The defrost control method provided in an embodiment of the present invention is applied to refrigeration equipment, which may include but is not limited to: freezing equipment, refrigeration equipment, etc. Specifically, the refrigeration equipment is controlled to enter the defrost mode by obtaining the real-time air volume change of the evaporator, and the defrost mode is exited according to the defrost rate control.

[0055] like Figure 2 The figure shows a schematic diagram of the structure of a refrigeration device provided by an embodiment of the present invention, and the refrigeration device may include: 1. compressor; 2. condenser; 3. liquid storage device; 4. plate heat exchanger; 5. electronic expansion valve 2; 6. solenoid valve 2; 7. solenoid valve 1; 8. electronic expansion valve 1; 9. evaporator; 10. four-way valve; 11. refrigerant inlet temperature sensor; 12. refrigerant inlet pressure sensor; 13. refrigerant outlet temperature sensor; 14. refrigerant outlet pressure sensor; 15. evaporator air outlet temperature and humidity sensor; 16. evaporator air inlet temperature and humidity sensor.

[0056] In this embodiment, the first air volume and the second air volume of the air outlet of the evaporator of the refrigeration device are obtained, the first air volume represents the air volume of the air outlet when the refrigeration device is initially operated, that is, the first air volume is the air volume before frost is formed during the initial operation, and the second air volume is the air volume obtained in real time during the operation of the refrigeration device. The air volume can be obtained by an air volume detection device or by calculation.

[0057] In a possible implementation, the air volume can be obtained by the following calculation method:

[0058] A first enthalpy value of the refrigerant outlet is determined according to a first pressure and a first temperature of the refrigerant outlet of the evaporator, and a second enthalpy value of the refrigerant outlet is determined according to a second pressure and a second temperature of the refrigerant inlet of the evaporator; a third enthalpy value of the air outlet is determined according to a first humidity and a third temperature of the air outlet of the evaporator, and a fourth enthalpy value of the air outlet is determined according to a second humidity and a fourth temperature of the air inlet of the evaporator; a first air volume and a second air volume are determined according to the first enthalpy value, the second enthalpy value, the third enthalpy value and the fourth enthalpy value, as well as the refrigerant flow rate, the air specific volume and the moisture content of the air outlet.

[0059] Specifically, the enthalpy-humidity diagram of the refrigeration equipment under different operating conditions is pre-built. Through the enthalpy-humidity diagram, the enthalpy values ​​corresponding to different temperature and pressure, as well as the enthalpy values ​​corresponding to different temperature and humidity can be queried. Figure 2 13, the refrigerant outlet temperature sensor and 14, the refrigerant outlet pressure sensor respectively obtain the first temperature and the first pressure of the refrigerant outlet, and determine the first enthalpy value H1 corresponding to the first temperature and the first pressure. Figure 2 11, the refrigerant inlet temperature sensor and 12, the refrigerant inlet pressure sensor respectively obtain the second temperature and the second pressure of the refrigerant inlet, and determine the second enthalpy value H2 corresponding to the second temperature and the second pressure. Figure 2 15, the evaporator air outlet temperature and humidity sensor obtains the third temperature and the first humidity of the air outlet, and determines the third enthalpy value H3 corresponding to the third temperature and the first humidity. Figure 2 16. The evaporator air inlet temperature and humidity sensor obtains the fourth temperature and second humidity of the air inlet, and determines the fourth enthalpy value H4 corresponding to the fourth temperature and the second humidity. At the same time, the refrigerant flow rate m, the air specific volume C and the moisture content W at the air outlet are obtained. It is determined by the following formula: air volume A = m(H1-H2) / (H3-H4)*(C*(1+W)). The first air volume is the air volume calculated when the refrigeration equipment is just powered on and has not yet frosted, and the second air volume can be the air volume calculated in real time according to demand during the operation of the refrigeration equipment.

[0060] Further, controlling the refrigeration device to enter the defrost mode according to the first air volume and the second air volume includes:

[0061] When the continuous operation time of the refrigeration equipment reaches a first time length, the refrigerant outlet temperature is greater than the temperature threshold, and the second air volume is less than or equal to the first air volume, determining whether the second air volume is less than or equal to the first air volume threshold;

[0062] If the second air volume is less than or equal to the first air volume threshold, the refrigeration device is controlled to enter the defrost mode;

[0063] If the second air volume is greater than the first air volume threshold, determining whether the second air volume is less than or equal to the second air volume threshold, where the second air volume threshold is the product of the first air volume and the first weight;

[0064] If the second air volume is less than or equal to the second air volume threshold, the refrigeration device is controlled to enter the defrost mode;

[0065] If the second air volume is greater than the second air volume threshold, determine whether the second air volume is less than or equal to the third air volume threshold, the third air volume threshold is the product of the first air volume and the second weight, and the second weight is less than the first weight;

[0066] If the second air volume is less than or equal to the third air volume threshold, the refrigeration device is controlled to enter the defrost mode.

[0067] Optionally, when the continuous operation time of the refrigeration equipment reaches a first time period, the refrigerant outlet temperature is greater than a temperature threshold, and the second air volume is greater than the first air volume, the first air volume is adjusted to be equal to the second air volume.

[0068] In this embodiment, if Figure 3 As shown, it is a flow chart of another defrost control method provided by an embodiment of the present invention. When the refrigeration equipment operates in the refrigeration mode, it is determined whether the continuous operation time reaches the first time length (10 minutes), and whether the refrigerant outlet temperature (Te1) is greater than the temperature threshold (5°C), and whether the second air volume (A0) obtained when running for the first time length is greater than the first air volume (A1).

[0069] When the continuous operation time reaches 10 minutes, Te1>5℃, and A0>A1, it means that the first air volume A1 calculated initially is inaccurate and A1 needs to be modified manually. Alternatively, since the current A0 is the air volume after a short operation (10 minutes), A0 should be similar to the air volume before frost. The first air volume can be modified to A1=A0.

[0070] When the continuous operation time reaches 10 minutes, Te1>5℃, and A0≤A1, it means that the real-time air volume after running for ten minutes is less than the initial air volume without frost. Frost may have occurred. The judgment of whether to enter the defrost mode is executed:

[0071] Determine whether the second air volume is less than or equal to the preset first air volume threshold. For example, when the first air volume threshold is 50m3 / h, if the second air volume A2 obtained in real time is ≤50m3 / h, enter the defrost mode, otherwise continue to judge, that is, when A2>50m3 / h, continue to judge whether the current real-time air volume A2 is less than or equal to the second air volume threshold. The second air volume threshold is greater than the first air volume threshold. The second air volume threshold is the product of the first air volume and the first weight (for example, 0.5*A1, the first weight is 0.5). When A2≤0.5*A1, the defrost mode is entered, otherwise the judgment is continued, that is, when A2>0.5*A1, whether the current real-time air volume A2 is less than or equal to the third air volume threshold value is continued to be judged, the third air volume threshold value is greater than the second air volume threshold value, the third air volume threshold value is the product of the first air volume and the second weight, the second weight is less than the first weight (for example, 0.4*A1, the second weight is 0.4), when A2≤0.4*A1, the defrost mode is entered, otherwise the current operating state is maintained without entering the defrost mode and the judgment is continued whether to perform defrost is performed.

[0072] Further, calculating the defrost rate of the refrigeration equipment according to the second air volume includes:

[0073] After entering the defrost mode and starting defrosting, the second air volume is obtained once every second time interval (for example, 30 seconds); each time a new second air volume is obtained, the historical second air volume obtained last time is divided by the current new second air volume obtained, as the current defrost rate. Thus, the real-time defrost rate is obtained. For example, if the current new second air volume is A3, and the historical second air volume obtained 30 seconds ago is A4, then the defrost rate L = A4 / A3, and a defrost rate L is calculated in real time every 30 seconds.

[0074] Further, controlling the refrigeration device to exit the defrost mode according to the defrost rate, the first air volume, and the second air volume includes:

[0075] When the duration of the defrost rate being greater than or equal to the first rate threshold is greater than the third duration, and the second air volume is greater than or equal to the fourth air volume threshold, the refrigeration device is controlled to exit the defrost mode, otherwise, the defrost mode is continued, and the fourth air volume threshold is the product of the first air volume and the third weight;

[0076] Or, when the defrost rate is greater than or equal to the first rate threshold for a duration greater than a fourth duration, and the second air volume is greater than or equal to the fifth air volume threshold, the refrigeration equipment is controlled to exit the defrost mode; otherwise, the defrost mode is maintained, the fourth duration is greater than the third duration, the fifth air volume threshold is the product of the first air volume and the fourth weight, and the fourth weight is less than the third weight.

[0077] In this embodiment, if Figure 4As shown, it is a flow chart of another defrost control method provided by an embodiment of the present invention. During the defrost process, it is first determined whether the current real-time second air volume A2 is equal to the unfrosted first air volume A1. If A2≠A1, it is determined whether the continuous defrost time reaches the maximum frost time. If not, it is determined whether the real-time defrost rate L is greater than or equal to the first rate threshold. For example, the first rate threshold is 0.99. If L≥0.99, it means that the air volume has not been increased, and the defrost is ineffective or too slow. It is necessary to maintain the defrost mode and increase the defrost power or gear. If L<0.99, the step of intelligently determining whether to exit the defrost mode is entered. Assume that the third time duration is 1min, the fourth air volume threshold is 0.95*A1, that is, the fourth air volume threshold is the product of the first air volume and the third weight. The fourth time duration is 3min, and the fourth air volume threshold is 0.9*A1, that is, the fourth air volume threshold is the product of the first air volume and the fourth weight.

[0078] During the defrosting process, when the duration of L≥0.99 reaches 1min, and the current second air volume A2≥0.95*A1, the defrosting mode is exited and the defrosting is stopped. If A2<0.95*A1, the judgment is continued. When the duration of L≥0.99 reaches 3min, and the current second air volume A2≥0.9*A1, the defrosting mode is exited and the defrosting is stopped. If A2<0.9*A1, the judgment is continued. When the duration of L≥0.99 reaches the fifth duration of 5min, and the current second air volume A2≥0.9*A2, the defrosting mode is exited and the defrosting is stopped. That is, after the duration reaches the fifth duration, no matter what the current second air volume is, the defrosting mode is forced to exit, and the fifth duration is greater than the fourth duration.

[0079] Optionally, when the second air volume is equal to the first air volume, it indicates that the current state is not frosted, and the refrigeration device is controlled to exit the defrost mode; or, when the current defrost time reaches the maximum frost time, the refrigeration device is controlled to exit the defrost mode.

[0080] The defrost control method provided by the embodiment of the present invention obtains the first air volume and the second air volume of the air outlet of the evaporator of the refrigeration device, wherein the first air volume represents the air volume of the air outlet when the refrigeration device is initially operated, and the second air volume represents the air volume of the air outlet when the refrigeration device is in real-time operation; the refrigeration device is controlled to enter the defrost mode according to the first air volume and the second air volume; during the defrost process, the defrost rate of the refrigeration device is calculated according to the second air volume; and the refrigeration device is controlled to exit the defrost mode according to the defrost rate, the first air volume and the second air volume. Thus, the refrigeration device can be controlled to enter the defrost mode by obtaining the real-time air volume change of the evaporator, and the defrost mode can be exited according to the defrost rate, thereby realizing precise control of entering and exiting the defrost mode, and the air volume of the defrost process can be monitored in real time, thereby avoiding waste of resources and performance degradation, improving the real-time and accuracy of defrost control, and avoiding equipment failure caused by frost.

[0081] Figure 5 A structural schematic diagram of a defrost control device provided by an embodiment of the present invention is shown in FIG. Figure 5 The device specifically includes:

[0082] An acquisition module 51 is used to acquire a first air volume and a second air volume of an evaporator air outlet of a refrigeration device, wherein the first air volume represents the air volume of the air outlet when the refrigeration device is initially operated, and the second air volume represents the air volume of the air outlet when the refrigeration device is in real-time operation;

[0083] A control module 52, configured to control the refrigeration device to enter a defrost mode according to the first air volume and the second air volume;

[0084] A calculation module 53, configured to calculate a defrost rate of the refrigeration equipment according to the second air volume during the defrost process;

[0085] The control module is further used to control the refrigeration device to exit the defrost mode according to the defrost rate, the first air volume and the second air volume.

[0086] In a possible implementation manner, the acquisition module is specifically configured to determine a first enthalpy value of the refrigerant outlet according to a first pressure and a first temperature of the refrigerant outlet of the evaporator, and determine a second enthalpy value of the refrigerant outlet according to a second pressure and a second temperature of the refrigerant inlet of the evaporator;

[0087] determining a third enthalpy value of the air outlet according to the first humidity and the third temperature of the air outlet of the evaporator, and determining a fourth enthalpy value of the air outlet according to the second humidity and the fourth temperature of the air inlet of the evaporator;

[0088] The first air volume and the second air volume are determined according to the first enthalpy value, the second enthalpy value, the third enthalpy value and the fourth enthalpy value, as well as the refrigerant flow rate, the air specific volume and the moisture content of the air outlet.

[0089] In a possible implementation manner, the control module is specifically configured to determine whether the second air volume is less than or equal to a first air volume threshold when the continuous operation time of the refrigeration equipment reaches a first time length, the refrigerant outlet temperature is greater than a temperature threshold, and the second air volume is less than or equal to the first air volume;

[0090] If the second air volume is less than or equal to the first air volume threshold, controlling the refrigeration device to enter a defrost mode;

[0091] If the second air volume is greater than the first air volume threshold, determining whether the second air volume is less than or equal to a second air volume threshold, where the second air volume threshold is the product of the first air volume and a first weight;

[0092] If the second air volume is less than or equal to the second air volume threshold, controlling the refrigeration device to enter a defrost mode;

[0093] If the second air volume is greater than the second air volume threshold, determining whether the second air volume is less than or equal to a third air volume threshold, wherein the third air volume threshold is the product of the first air volume and a second weight, and the second weight is less than the first weight;

[0094] If the second air volume is less than or equal to the third air volume threshold, the refrigeration device is controlled to enter a defrost mode.

[0095] In a possible implementation, the control module is further used to adjust the first air volume to be equal to the second air volume when the continuous operation time of the refrigeration equipment reaches a first time, the refrigerant outlet temperature is greater than a temperature threshold, and the second air volume is greater than the first air volume.

[0096] In a possible implementation manner, the calculation module is specifically configured to obtain the second wind volume once every second time interval;

[0097] Each time a new second air volume is obtained, the historical second air volume obtained last time is divided by the new second air volume currently obtained to obtain the current defrosting rate.

[0098] In a possible implementation manner, the control module is specifically used to control the refrigeration device to exit the defrost mode when the duration of the defrost rate being greater than or equal to the first rate threshold is greater than a third duration, and the second air volume is greater than or equal to a fourth air volume threshold, otherwise, continue to maintain the defrost mode, and the fourth air volume threshold is the product of the first air volume and the third weight;

[0099] Or, when the defrost rate is greater than or equal to the first rate threshold and the duration is greater than a fourth duration, and the second air volume is greater than or equal to a fifth air volume threshold, the refrigeration device is controlled to exit the defrost mode, otherwise, the defrost mode is maintained, the fourth duration is greater than the third duration, the fifth air volume threshold is the product of the first air volume and a fourth weight, and the fourth weight is less than the third weight.

[0100] In a possible implementation manner, the control module is further configured to control the refrigeration device to exit the defrost mode when the second air volume is equal to the first air volume;

[0101] Or, when the current defrost time reaches the maximum defrost time, controlling the refrigeration device to exit the defrost mode;

[0102] Or, when the defrost rate is greater than or equal to the first rate threshold and the duration is longer than a fifth duration, the refrigeration device is controlled to exit the defrost mode, and the fifth duration is longer than the fourth duration.

[0103] The defrost control device provided in this embodiment can be as follows Figure 5 The device shown in FIG. 1 can perform the following steps: Figure 1 All steps of the defrost control method are achieved Figure 1 For details on the technical effects of the defrost control method shown, please refer to Figure 1 For the sake of brevity, the relevant description is not repeated here.

[0104] Figure 6 A schematic diagram of the structure of a refrigeration device provided by an embodiment of the present invention, Figure 6 The refrigeration device 600 shown includes: at least one processor 601, a memory 602, at least one network interface 604 and other user interfaces 603. The various components in the refrigeration device 600 are coupled together via a bus system 605. It is understood that the bus system 605 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 605 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, the bus system 605 is not described in detail. Figure 6 Various buses are labeled as bus system 605 .

[0105] The user interface 603 may include a display, a keyboard, or a pointing device (eg, a mouse, a trackball, a touch pad, or a touch screen).

[0106] It can be understood that the memory 602 in the embodiment of the present invention can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 602 described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0107] In some implementations, the memory 602 stores the following elements, executable units or data structures, or a subset thereof, or an extended set thereof: an operating system 6021 and an application 6022 .

[0108] The operating system 6021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., which are used to implement various basic services and process hardware-based tasks. The application 6022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., which are used to implement various application services. The program for implementing the method of the embodiment of the present invention can be included in the application 6022.

[0109] In the embodiment of the present invention, by calling the program or instruction stored in the memory 602, specifically, the program or instruction stored in the application 6022, the processor 601 is used to execute the method steps provided by each method embodiment, for example, including:

[0110] Acquire a first air volume and a second air volume of an evaporator air outlet of a refrigeration device, wherein the first air volume represents the air volume of the air outlet when the refrigeration device is initially operated, and the second air volume represents the air volume of the air outlet when the refrigeration device is in real-time operation;

[0111] controlling the refrigeration device to enter a defrost mode according to the first air volume and the second air volume;

[0112] During the defrosting process, calculating the defrosting rate of the refrigeration equipment according to the second air volume;

[0113] The refrigeration device is controlled to exit the defrost mode according to the defrost rate, the first air volume, and the second air volume.

[0114] In a possible implementation manner, a first enthalpy value of the refrigerant outlet is determined according to a first pressure and a first temperature of the refrigerant outlet of the evaporator, and a second enthalpy value of the refrigerant outlet is determined according to a second pressure and a second temperature of the refrigerant inlet of the evaporator;

[0115] determining a third enthalpy value of the air outlet according to the first humidity and the third temperature of the air outlet of the evaporator, and determining a fourth enthalpy value of the air outlet according to the second humidity and the fourth temperature of the air inlet of the evaporator;

[0116] The first air volume and the second air volume are determined according to the first enthalpy value, the second enthalpy value, the third enthalpy value and the fourth enthalpy value, as well as the refrigerant flow rate, the air specific volume and the moisture content of the air outlet.

[0117] In a possible implementation, when the continuous operation time of the refrigeration device reaches a first time length, and the refrigerant outlet temperature is greater than a temperature threshold, and the second air volume is less than or equal to the first air volume, it is determined whether the second air volume is less than or equal to the first air volume threshold;

[0118] If the second air volume is less than or equal to the first air volume threshold, controlling the refrigeration device to enter a defrost mode;

[0119] If the second air volume is greater than the first air volume threshold, determining whether the second air volume is less than or equal to a second air volume threshold, where the second air volume threshold is the product of the first air volume and a first weight;

[0120] If the second air volume is less than or equal to the second air volume threshold, controlling the refrigeration device to enter a defrost mode;

[0121] If the second air volume is greater than the second air volume threshold, determining whether the second air volume is less than or equal to a third air volume threshold, wherein the third air volume threshold is the product of the first air volume and a second weight, and the second weight is less than the first weight;

[0122] If the second air volume is less than or equal to the third air volume threshold, the refrigeration device is controlled to enter a defrost mode.

[0123] In a possible implementation, when the continuous operation time of the refrigeration equipment reaches a first time period, the refrigerant outlet temperature is greater than a temperature threshold, and the second air volume is greater than the first air volume, the first air volume is adjusted to be equal to the second air volume.

[0124] In a possible implementation, the second air volume is obtained once at every second time interval;

[0125] Each time a new second air volume is obtained, the historical second air volume obtained last time is divided by the new second air volume currently obtained to obtain the current defrosting rate.

[0126] In a possible implementation, when the duration of the defrost rate being greater than or equal to the first rate threshold is greater than the third duration, and the second air volume is greater than or equal to a fourth air volume threshold, the refrigeration device is controlled to exit the defrost mode, otherwise, the defrost mode is maintained, and the fourth air volume threshold is the product of the first air volume and the third weight;

[0127] Or, when the defrost rate is greater than or equal to the first rate threshold and the duration is greater than a fourth duration, and the second air volume is greater than or equal to a fifth air volume threshold, the refrigeration device is controlled to exit the defrost mode, otherwise, the defrost mode is maintained, the fourth duration is greater than the third duration, the fifth air volume threshold is the product of the first air volume and a fourth weight, and the fourth weight is less than the third weight.

[0128] In a possible implementation, when the second air volume is equal to the first air volume, controlling the refrigeration device to exit the defrost mode;

[0129] Or, when the current defrost time reaches the maximum defrost time, controlling the refrigeration device to exit the defrost mode;

[0130] Or, when the defrost rate is greater than or equal to the first rate threshold and the duration is longer than a fifth duration, the refrigeration device is controlled to exit the defrost mode, and the fifth duration is longer than the fourth duration.

[0131] The method disclosed in the above embodiment of the present invention can be applied to the processor 601, or implemented by the processor 601. The processor 601 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 601 or the instruction in the form of software. The above processor 601 can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware decoding processor to execute, or the hardware and software units in the decoding processor can be executed. The software unit can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 602, and the processor 601 reads the information in the memory 602 and completes the steps of the above method in combination with its hardware.

[0132] It is understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPDevice, DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in the present application, or a combination thereof.

[0133] For software implementation, the technology described herein can be implemented by a unit that performs the functions described herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0134] The refrigeration device provided in this embodiment can be as follows Figure 6 The device shown in , can be executed as Figure 1 All steps of the defrost control method are achieved Figure 1 For details on the technical effects of the defrost control method shown, please refer to Figure 1 For the sake of brevity, the relevant description is not repeated here.

[0135] The embodiment of the present invention also provides a storage medium (computer-readable storage medium). The storage medium here stores one or more programs. The storage medium may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a read-only memory, a flash memory, a hard disk or a solid-state drive; the memory may also include a combination of the above-mentioned types of memory.

[0136] When one or more programs in the storage medium can be executed by one or more processors, the defrost control method executed on the device side can be implemented.

[0137] The processor is used to execute the defrost control program stored in the memory to implement the following steps of the defrost control method performed on the device side:

[0138] Acquire a first air volume and a second air volume of an evaporator air outlet of a refrigeration device, wherein the first air volume represents the air volume of the air outlet when the refrigeration device is initially operated, and the second air volume represents the air volume of the air outlet when the refrigeration device is in real-time operation;

[0139] controlling the refrigeration device to enter a defrost mode according to the first air volume and the second air volume;

[0140] During the defrosting process, calculating the defrosting rate of the refrigeration equipment according to the second air volume;

[0141] The refrigeration device is controlled to exit the defrost mode according to the defrost rate, the first air volume, and the second air volume.

[0142] In a possible implementation manner, a first enthalpy value of the refrigerant outlet is determined according to a first pressure and a first temperature of the refrigerant outlet of the evaporator, and a second enthalpy value of the refrigerant outlet is determined according to a second pressure and a second temperature of the refrigerant inlet of the evaporator;

[0143] determining a third enthalpy value of the air outlet according to the first humidity and the third temperature of the air outlet of the evaporator, and determining a fourth enthalpy value of the air outlet according to the second humidity and the fourth temperature of the air inlet of the evaporator;

[0144] The first air volume and the second air volume are determined according to the first enthalpy value, the second enthalpy value, the third enthalpy value and the fourth enthalpy value, as well as the refrigerant flow rate, the air specific volume and the moisture content of the air outlet.

[0145] In a possible implementation, when the continuous operation time of the refrigeration device reaches a first time length, and the refrigerant outlet temperature is greater than a temperature threshold, and the second air volume is less than or equal to the first air volume, it is determined whether the second air volume is less than or equal to the first air volume threshold;

[0146] If the second air volume is less than or equal to the first air volume threshold, controlling the refrigeration device to enter a defrost mode;

[0147] If the second air volume is greater than the first air volume threshold, determining whether the second air volume is less than or equal to a second air volume threshold, where the second air volume threshold is the product of the first air volume and a first weight;

[0148] If the second air volume is less than or equal to the second air volume threshold, controlling the refrigeration device to enter a defrost mode;

[0149] If the second air volume is greater than the second air volume threshold, determining whether the second air volume is less than or equal to a third air volume threshold, wherein the third air volume threshold is the product of the first air volume and a second weight, and the second weight is less than the first weight;

[0150] If the second air volume is less than or equal to the third air volume threshold, the refrigeration device is controlled to enter a defrost mode.

[0151] In a possible implementation, when the continuous operation time of the refrigeration equipment reaches a first time period, the refrigerant outlet temperature is greater than a temperature threshold, and the second air volume is greater than the first air volume, the first air volume is adjusted to be equal to the second air volume.

[0152] In a possible implementation, the second air volume is obtained once at every second time interval;

[0153] Each time a new second air volume is obtained, the historical second air volume obtained last time is divided by the new second air volume currently obtained to obtain the current defrosting rate.

[0154] In a possible implementation, when the duration of the defrost rate being greater than or equal to the first rate threshold is greater than the third duration, and the second air volume is greater than or equal to a fourth air volume threshold, the refrigeration device is controlled to exit the defrost mode, otherwise, the defrost mode is maintained, and the fourth air volume threshold is the product of the first air volume and the third weight;

[0155] Or, when the defrost rate is greater than or equal to the first rate threshold and the duration is greater than a fourth duration, and the second air volume is greater than or equal to a fifth air volume threshold, the refrigeration device is controlled to exit the defrost mode, otherwise, the defrost mode is continued to be maintained, the fourth duration is greater than the third duration, the fifth air volume threshold is the product of the first air volume and a fourth weight, and the fourth weight is less than the third weight.

[0156] In a possible implementation, when the second air volume is equal to the first air volume, controlling the refrigeration device to exit the defrost mode;

[0157] Or, when the current defrost time reaches the maximum defrost time, controlling the refrigeration device to exit the defrost mode;

[0158] Or, when the defrost rate is greater than or equal to the first rate threshold and the duration is longer than a fifth duration, the refrigeration device is controlled to exit the defrost mode, and the fifth duration is longer than the fourth duration.

[0159] The professionals should further realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0160] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0161] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A defrost control method, characterized in that: include: Acquire a first air volume and a second air volume of an evaporator air outlet of a refrigeration device, wherein the first air volume represents the air volume of the air outlet when the refrigeration device is initially operated, and the second air volume represents the air volume of the air outlet when the refrigeration device is in real-time operation; controlling the refrigeration device to enter a defrost mode according to the first air volume and the second air volume; During the defrosting process, calculating the defrosting rate of the refrigeration equipment according to the second air volume; The refrigeration device is controlled to exit the defrost mode according to the defrost rate, the first air volume, and the second air volume.

2. The method according to claim 1, characterized in that The first air volume and the second air volume are obtained by: Determine a first enthalpy value of the refrigerant outlet according to a first pressure and a first temperature of the refrigerant outlet of the evaporator, and determine a second enthalpy value of the refrigerant outlet according to a second pressure and a second temperature of the refrigerant inlet of the evaporator; determining a third enthalpy value of the air outlet according to the first humidity and the third temperature of the air outlet of the evaporator, and determining a fourth enthalpy value of the air outlet according to the second humidity and the fourth temperature of the air inlet of the evaporator; The first air volume and the second air volume are determined according to the first enthalpy value, the second enthalpy value, the third enthalpy value and the fourth enthalpy value, as well as the refrigerant flow rate, the air specific volume and the moisture content of the air outlet.

3. The method according to claim 1, characterized in that The controlling the refrigeration device to enter the defrost mode according to the first air volume and the second air volume includes: When the continuous operation time of the refrigeration device reaches a first time length, the refrigerant outlet temperature is greater than a temperature threshold, and the second air volume is less than or equal to the first air volume, determining whether the second air volume is less than or equal to the first air volume threshold; If the second air volume is less than or equal to the first air volume threshold, controlling the refrigeration device to enter a defrost mode; If the second air volume is greater than the first air volume threshold, determining whether the second air volume is less than or equal to a second air volume threshold, where the second air volume threshold is the product of the first air volume and a first weight; If the second air volume is less than or equal to the second air volume threshold, controlling the refrigeration device to enter a defrost mode; If the second air volume is greater than the second air volume threshold, determining whether the second air volume is less than or equal to a third air volume threshold, wherein the third air volume threshold is the product of the first air volume and a second weight, and the second weight is less than the first weight; If the second air volume is less than or equal to the third air volume threshold, the refrigeration device is controlled to enter a defrost mode.

4. The method according to claim 3, characterized in that The method further comprises: When the continuous operation time of the refrigeration equipment reaches a first time period, the refrigerant outlet temperature is greater than a temperature threshold, and the second air volume is greater than the first air volume, the first air volume is adjusted to be equal to the second air volume.

5. The method according to claim 1, characterized in that The calculating the defrost rate of the refrigeration equipment according to the second air volume includes: Obtaining a second air volume once every second time interval; Each time a new second air volume is obtained, the historical second air volume obtained last time is divided by the new second air volume currently obtained to obtain the current defrosting rate.

6. The method according to claim 5, characterized in that The controlling the refrigeration device to exit the defrost mode according to the defrost rate, the first air volume, and the second air volume includes: When the duration of the defrost rate being greater than or equal to the first rate threshold is greater than the third duration, and the second air volume is greater than or equal to the fourth air volume threshold, the refrigeration device is controlled to exit the defrost mode, otherwise, the defrost mode is continued, and the fourth air volume threshold is the product of the first air volume and the third weight; Or, when the defrost rate is greater than or equal to the first rate threshold and the duration is greater than a fourth duration, and the second air volume is greater than or equal to a fifth air volume threshold, the refrigeration device is controlled to exit the defrost mode, otherwise, the defrost mode is maintained, the fourth duration is greater than the third duration, the fifth air volume threshold is the product of the first air volume and a fourth weight, and the fourth weight is less than the third weight.

7. The method according to claim 6, characterized in that The method further comprises: When the second air volume is equal to the first air volume, controlling the refrigeration device to exit the defrost mode; Or, when the current defrost time reaches the maximum defrost time, controlling the refrigeration device to exit the defrost mode; Or, when the defrost rate is greater than or equal to the first rate threshold and the duration is longer than a fifth duration, the refrigeration device is controlled to exit the defrost mode, and the fifth duration is longer than the fourth duration.

8. A defrost control device, characterized in that: include: An acquisition module, used to acquire a first air volume and a second air volume of an evaporator air outlet of a refrigeration device, wherein the first air volume represents the air volume of the air outlet when the refrigeration device is initially operated, and the second air volume represents the air volume of the air outlet when the refrigeration device is in real-time operation; a control module, configured to control the refrigeration device to enter a defrost mode according to the first air volume and the second air volume; a calculation module, used for calculating the defrost rate of the refrigeration equipment according to the second air volume during the defrost process; The control module is further used to control the refrigeration device to exit the defrost mode according to the defrost rate, the first air volume and the second air volume.

9. A refrigeration device, characterized in that: include: A processor and a memory, wherein the processor is used to execute a defrost control program stored in the memory to implement the defrost control method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the defrost control method according to any one of claims 1 to 7.

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