Temperature control method and device of refrigeration equipment and refrigeration equipment

Abstract

Embodiments of the present application relate to the technical field of refrigeration equipment, and disclose a temperature control method and device of a refrigeration equipment and the refrigeration equipment. The method comprises the following steps: determining a first cooling capacity required for maintaining the temperature of a target space at a target temperature; wherein the target space is a refrigeration space of the refrigeration equipment; calculating a second cooling capacity required by proportional-integral-derivative (PID) adjustment based on the deviation between the target temperature and the current temperature of the target space; and adjusting the output of the refrigeration equipment according to the sum of the first cooling capacity and the second cooling capacity.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and more specifically, to a temperature control method, apparatus, and refrigeration equipment for refrigeration equipment. Background Technology

[0002] With the widespread use of refrigeration equipment, the technologies used in its application are also advancing rapidly. For refrigeration equipment, such as refrigerators, temperature control technology has always been a key research focus.

[0003] However, the temperature control technologies currently used in refrigeration equipment are mostly not ideal in practice, and their performance is not balanced in terms of response speed, anti-interference, robustness and energy saving. Summary of the Invention

[0004] Based on the above-mentioned technological status, this application proposes a temperature control method, device, and refrigeration equipment for refrigeration equipment, which can enable the refrigeration equipment to achieve better practical results.

[0005] According to a first aspect of the embodiments of this application, a temperature control method for a refrigeration device is provided, the temperature control method comprising: Determine the first cooling capacity required to maintain the temperature of the target space at the target temperature; wherein, the target space is the cooling space of the refrigeration device; Based on the deviation between the target temperature and the current temperature of the target space, the required second cooling capacity is calculated using proportional-integral-derivative (PID) control. The output of the refrigeration equipment is adjusted according to the sum of the first cooling capacity and the second cooling capacity.

[0006] Optionally, adjusting the output of the refrigeration equipment based on the sum of the first cooling capacity and the second cooling capacity includes: Based on the sum of the first cooling capacity and the second cooling capacity, the control parameters to be executed are determined, including: damper opening and / or fan speed; The damper components and / or fan components of the refrigeration equipment are controlled to operate according to the control parameters to be executed.

[0007] Optionally, the control parameters to be executed are determined based on the sum of the first cooling capacity and the second cooling capacity, including: Determine the target calibrated cooling capacity corresponding to the sum of the first cooling capacity and the second cooling capacity in the calibration mapping file; wherein, the calibration mapping file includes: multiple calibrated cooling capacities, damper opening and / or fan speed required for the calibrated cooling equipment to output each calibrated cooling capacity; The damper opening and / or fan speed corresponding to the target calibrated cooling capacity are determined as the control parameters to be executed.

[0008] Optionally, the method further includes: The power consumption of the calibrated refrigeration equipment is obtained for each output cooling capacity and each damper opening matched with different fan speeds; the output cooling capacity includes the cooling capacity output within a preset time period. For each type of output cooling capacity, select the damper opening and matching fan speed that minimize power consumption, and generate the calibration mapping file.

[0009] Optionally, the control parameters to be executed are determined based on the sum of the first cooling capacity and the second cooling capacity, including: According to a preset energy-saving strategy, the required damper opening and / or fan speed are calculated when the sum of the first cooling capacity and the second cooling capacity is output; wherein, the preset energy-saving strategy includes: a rule for calculating the damper opening and / or fan speed required to output the calibrated cooling capacity with energy saving as the goal; The calculated damper opening and / or fan speed are determined as the control parameters to be executed.

[0010] Optionally, based on a preset energy-saving strategy, the required damper opening and / or fan speed are calculated when the sum of the first and second cooling capacities is output, including: According to the preset energy-saving strategy, when the current damper opening of the refrigeration equipment is within the damper opening range and the current fan speed is within the fan speed range, the output cooling capacity of the refrigeration equipment is determined. When the output cooling capacity of the refrigeration equipment is greater than or equal to the sum of the first cooling capacity and the second cooling capacity, the damper opening closest to the maximum value in the damper opening range and the fan speed closest to the minimum value in the fan speed range are selected as the required damper opening and / or fan speed. The output cooling capacity includes the cooling capacity output within a preset time period.

[0011] Optionally, after adjusting the output of the refrigeration equipment based on the sum of the first cooling capacity and the second cooling capacity, the method further includes: At target intervals, the first cooling capacity and the second cooling capacity are updated based on the latest monitored temperature of the target space, and the output of the refrigeration equipment is readjusted based on the updated first cooling capacity and the second cooling capacity.

[0012] Optionally, before calculating the first cooling amount required to maintain the temperature of the target space at the target temperature, the method further includes: Receive the target temperature input by the user.

[0013] According to a second aspect of the embodiments of this application, a temperature control device for a refrigeration device is provided, the temperature control device comprising: A first calculation module is used to determine a first cooling capacity required to maintain the temperature of the target space at the target temperature; wherein the target space is the cooling space of the refrigeration device; The second calculation module is used to calculate the required second cooling capacity based on the deviation between the target temperature and the current temperature of the target space using proportional-integral-derivative (PID) adjustment. The temperature control module is used to adjust the output of the refrigeration equipment according to the sum of the first cooling capacity and the second cooling capacity.

[0014] Optionally, the temperature control module includes: The control parameter unit is used to determine the control parameters to be executed based on the sum of the first cooling capacity and the second cooling capacity. The control parameters to be executed include: damper opening and / or fan speed. A temperature control unit is used to control the operation of the damper components and / or fan components of the refrigeration equipment according to the control parameters to be executed.

[0015] Optionally, the control parameter unit is specifically used for: Determine the target calibrated cooling capacity corresponding to the sum of the first cooling capacity and the second cooling capacity in the calibration mapping file; wherein, the calibration mapping file includes: multiple calibrated cooling capacities, damper opening and / or fan speed required for the calibrated cooling equipment to output each calibrated cooling capacity; The damper opening and / or fan speed corresponding to the target calibrated cooling capacity are determined as the control parameters to be executed.

[0016] Optionally, the temperature control device further includes: a calibration module, used for: The power consumption of the calibrated refrigeration equipment is obtained for each output cooling capacity and each damper opening matched with different fan speeds; the output cooling capacity includes the cooling capacity output within a preset time period. For each type of output cooling capacity, select the damper opening and matching fan speed that minimize power consumption, and generate the calibration mapping file.

[0017] Optionally, the control parameter unit is specifically used for: According to a preset energy-saving strategy, the required damper opening and / or fan speed are calculated when the sum of the first cooling capacity and the second cooling capacity is output; wherein, the preset energy-saving strategy includes: a rule for calculating the damper opening and / or fan speed required to output the calibrated cooling capacity with energy saving as the goal; The calculated damper opening and / or fan speed are determined as the control parameters to be executed.

[0018] Optionally, the control parameter unit is specifically used for: According to the preset energy-saving strategy, when the current damper opening of the refrigeration equipment is within the damper opening range and the current fan speed is within the fan speed range, the output cooling capacity of the refrigeration equipment is determined. When the output cooling capacity of the refrigeration equipment is greater than or equal to the sum of the first cooling capacity and the second cooling capacity, the damper opening closest to the maximum value in the damper opening range and the fan speed closest to the minimum value in the fan speed range are selected as the required damper opening and / or fan speed. The output cooling capacity includes the cooling capacity output within a preset time period.

[0019] Optionally, the temperature control device further includes: An update module is used to update the first cooling capacity and the second cooling capacity based on the latest monitored temperature of the target space at target intervals, and to readjust the output of the refrigeration equipment based on the updated first cooling capacity and the second cooling capacity.

[0020] Optionally, the temperature control device further includes: A receiving module is used to receive the target temperature input by the user.

[0021] According to a third aspect of the present application, a cooling device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method described in the first aspect of the present application.

[0022] According to a fourth aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the method described in the first aspect of the present application.

[0023] According to a fifth aspect of the present application, a computer program product is provided, including a computer program that, when executed by a processor, implements the method described in the first aspect of the present application.

[0024] The beneficial effects of the technical solutions provided in this application are: In this embodiment, temperature control method one determines the first cooling capacity required for the refrigeration equipment to maintain the temperature of its refrigerated space at the target temperature. Then, based on the deviation between the target temperature and the current temperature of the target space, temperature control method two calculates the second cooling capacity required to adjust the temperature of the refrigerated space to the target temperature under PID regulation. The output of the refrigeration equipment is then adjusted using the sum of the first and second cooling capacities as the target. The combination of these two temperature control methods throughout the entire temperature control process results in excellent practical performance for the refrigeration equipment, demonstrating a balanced performance in terms of response speed, anti-interference, robustness, and energy saving. Furthermore, compared to simple PID regulation, this embodiment exhibits smaller overshoot and stronger anti-interference capability and robustness.

[0025] Additional aspects and advantages of the embodiments of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the application. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is one of the flowcharts for a temperature control method for a refrigeration device provided in an embodiment of this application; Figure 2 A second flowchart illustrating the temperature control method for a refrigeration device provided in this application embodiment; Figure 3 This is a schematic diagram of the structure of the temperature control device for the refrigeration equipment provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of a refrigeration device provided in an embodiment of this application. Detailed Implementation

[0027] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0028] Those skilled in the art will understand that, unless otherwise stated, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the terms “comprising” and “including” as used in the embodiments of this application mean that the corresponding feature can be implemented as the presented feature, information, data, step, operation, element, and / or component, but do not exclude implementation as other features, information, data, step, operation, element, component, and / or combinations thereof supported by the art. It should be understood that when we say that an element is “connected” or “coupled” to another element, the one element can be directly connected or coupled to the other element, or it can mean that the one element and the other element establish a connection relationship through an intermediate element. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “multiple” refers to two or more; therefore, in the embodiments of this application, “multiple” can also be understood as “at least two.” The term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the related objects before and after it are in an "or" relationship.

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0030] As described in the background section, temperature control technology in refrigeration equipment has always been a research focus for those skilled in the art. Due to the simplicity, robustness, and reliability of proportional-integral-derivative (PID) control technology, most refrigeration equipment currently employs PID control as its temperature control technique.

[0031] However, due to the complexity of the operating environment and conditions of refrigeration equipment, it is difficult to adjust the PID parameters to the ideal state, resulting in less than ideal actual temperature control effects, such as slow response, overcooling, and excessive energy consumption.

[0032] Therefore, this application provides a temperature control method for refrigeration equipment. Based on PID regulation, another temperature control method is superimposed, enabling the entire temperature control process to combine the effects of both methods, resulting in a balanced performance in terms of response speed, anti-interference, robustness, and energy saving. Compared to simple PID regulation, the overshoot of this application's embodiment is smaller, and its anti-interference capability and robustness are stronger.

[0033] like Figure 1As shown, the temperature control method for the refrigeration equipment may include the following steps, wherein the refrigeration equipment includes any electronic device capable of refrigeration. For example, the refrigeration equipment includes a refrigeration unit, a refrigerator, and may also include an air conditioning unit with refrigeration function.

[0034] In some embodiments, the cooling capacity of a refrigerator or freezer can be adjusted by a fan or damper. Similarly, an air conditioning unit can adjust its cooling capacity by a damper or fan; for example, the damper in an air conditioning unit can be an air guide plate.

[0035] Step 101: Determine the first amount of cooling required to maintain the temperature of the target space at the target temperature.

[0036] In this step, the target space is the refrigeration space of the refrigeration equipment. This target space can also be the space where the refrigeration equipment regulates its temperature. For example, when the refrigeration equipment is a refrigerator, the target space can be the refrigerator compartment, freezer compartment, etc.

[0037] Understandably, when a refrigerator controls the temperature of only one compartment (e.g., the refrigerator compartment), that compartment is the target space, and the freezer compartment is not.

[0038] For example, when the refrigeration equipment is an air conditioner, the target space can be the indoor space where the air conditioner's indoor unit is located.

[0039] The first cooling capacity, also known as the first energy Q, can be measured in joules, watts, or kilowatt-hours.

[0040] In some embodiments, if the target temperature is lower than the temperature of the target space (current temperature), the first cooling capacity can be the heat removed from the target space by the refrigerant. Conversely, if the target temperature is higher than the temperature of the target space (current temperature), the first cooling capacity can be a negative value.

[0041] In some embodiments, the first cooling capacity can be determined based on heat exchange and related physical laws, without limitation. For example, the first cooling capacity can be calculated using the following formula.

[0042] Formula 1: ; in, Indicates the first cooling capacity; Indicates the transmission coefficient of the building envelope (which can be determined by the building / equipment material); Indicates the temperature outside the target space; Indicates the target temperature; Indicates air heat capacity; Indicates the current rate of temperature change (characterizing a trend of warming or cooling); This indicates the amount of heat dissipated by internal heat sources (such as equipment or personnel).

[0043] It is understandable that the process of determining the first cooling capacity in step 101 can be used as a feedforward adjustment for temperature control, which can actively compensate for major disturbances and compensate in advance, thus having a faster response speed.

[0044] The temperature of the target space and the temperature outside the target space in this step can be obtained through the temperature sensors of the cooling equipment. The specific method of acquisition is not limited here. For example, the temperature of the target space can be acquired in real time through the temperature sensor inside the cooling equipment; alternatively, the temperature outside the target space can be acquired in real time through the external temperature sensor of the cooling equipment.

[0045] The target temperature is the desired temperature or the specified temperature, which is the temperature regulation target of the target space.

[0046] Step 102: Based on the deviation between the target temperature and the current temperature of the target space, calculate the required second cooling capacity using PID control.

[0047] In this step, the second cooling capacity is similar to the first cooling capacity, except that the second cooling capacity is calculated using PID control. That is, the second cooling capacity is the amount of cooling required to adjust the temperature of the target space to the target temperature under PID control.

[0048] In some embodiments, a PID controller can be preset. When executing step 102, relevant parameters can be input into the PID controller to obtain the second cooling capacity. These relevant parameters can be the deviation between the target temperature and the current temperature of the target space, or the target temperature and the current temperature of the target space.

[0049] In some embodiments, the second cooling capacity calculated under PID control can be used as a compensation amount or a fine-tuning amount for the first cooling capacity.

[0050] Understandably, PID control involves proportional (P), integral (I), and derivative (D) components. The proportional component immediately generates a control action proportional to the magnitude of the deviation, providing a rapid response. The integral component accumulates historical deviations to eliminate steady-state error (static error), improving the accuracy of the final temperature reading. The derivative component adjusts based on the rate of change of the deviation, suppressing overshoot, preventing temperature fluctuations, and improving stability.

[0051] Step 103: Adjust the output of the refrigeration equipment according to the sum of the first cooling capacity and the second cooling capacity.

[0052] In this step, the sum of the first cooling capacity and the second cooling capacity is the final target cooling capacity. The refrigeration equipment needs to be adjusted to output the target cooling capacity so that the temperature of the target space can be adjusted to the target temperature as soon as possible and maintained at the target temperature.

[0053] Understandably, different refrigeration devices require different components to be adjusted when regulating the temperature of a target space according to the target cooling capacity. For example, for a refrigerator, the components that need to be adjusted may be the fan and the damper. Similarly, for an air conditioner, the components that need to be adjusted may be the fan and the air deflector.

[0054] In this embodiment, temperature control method one determines the first cooling capacity required for the refrigeration equipment to maintain the temperature of its refrigerated space at the target temperature. Then, based on the deviation between the target temperature and the current temperature of the target space, temperature control method two calculates the second cooling capacity required to adjust the temperature of the refrigerated space to the target temperature under PID regulation. The output of the refrigeration equipment is then adjusted using the sum of the first and second cooling capacities as the target. The combination of these two temperature control methods throughout the entire temperature control process results in excellent practical performance for the refrigeration equipment, demonstrating a balanced performance in terms of response speed, anti-interference, robustness, and energy saving. Furthermore, compared to simple PID regulation, this embodiment exhibits smaller overshoot and stronger anti-interference capability and robustness.

[0055] In some embodiments, adjusting the output of the refrigeration equipment based on the sum of the first cooling capacity and the second cooling capacity includes: Based on the sum of the first cooling capacity and the second cooling capacity, the control parameters to be executed are determined, including: damper opening and / or fan speed; Control the operation of the damper components and / or fan components of the refrigeration equipment according to the control parameters to be executed.

[0056] It should be noted that when the refrigeration equipment is a refrigerator, by controlling the operation of the refrigerator's damper and / or fan components, the refrigerator can output the sum of the first and second cooling capacities to the target space. For example, when the refrigerator is cooling, the fan component can control the airflow or speed directed towards the cooling space; the damper component can control the size of the opening directed towards the cooling space.

[0057] Among them, the control parameters to be executed include the control parameters that the damper components and / or fan components of the refrigeration equipment need to follow when executing.

[0058] In some embodiments, the control parameters to be executed may include damper commands and / or fan commands. The damper command carries a damper opening parameter, and the fan command carries a fan speed parameter. Thus, when the damper component executes the damper command, it adjusts the damper opening according to the parameters it carries. When the fan component executes the fan speed command, it can adjust the fan speed according to the parameters it carries.

[0059] Correspondingly, by controlling the operation of the damper components and / or fan components of the refrigeration equipment according to the control parameters to be executed, the amount of cold air delivered to the target space can be changed, thereby affecting the temperature of the target space, so that the refrigeration equipment can adjust the temperature of the target space to the target temperature as soon as possible and maintain it at the target temperature.

[0060] In this embodiment of the application, a control command to be executed, including damper opening and / or fan speed, can be generated, thereby achieving temperature regulation of the target space by means of the fan component and damper component of the refrigeration equipment.

[0061] In some embodiments, determining the control parameters to be executed based on the sum of the first cooling capacity and the second cooling capacity includes: Determine the target calibrated cooling capacity corresponding to the sum of the first and second cooling capacities in the calibration mapping file; wherein, the calibration mapping file includes: multiple calibrated cooling capacities, the damper opening and / or fan speed required for each calibrated cooling capacity output by the calibrated refrigeration equipment; The damper opening and / or fan speed corresponding to the target calibrated cooling capacity are determined as the control parameters to be executed.

[0062] It should be noted that a pre-calibrated calibration mapping file can be stored locally on the refrigeration equipment for easy access. Alternatively, this calibration mapping file can be stored in the cloud; the refrigeration equipment has cloud access capabilities and can retrieve the calibration mapping file from the cloud.

[0063] In some embodiments, the calibrated cooling capacity can be a specific value. If the sum of the first cooling capacity and the second cooling capacity is the same as a certain calibrated cooling capacity, then the damper opening and / or fan speed corresponding to the calibrated cooling capacity (i.e. the target calibrated cooling capacity) are the control parameters to be executed.

[0064] In some embodiments, the calibrated cooling capacity can be a numerical range, and multiple calibrated cooling capacities can be multiple continuous or discontinuous numerical ranges, with no overlapping values ​​in each numerical range. If the sum of the first cooling capacity and the second cooling capacity lies within a certain numerical range, then the damper opening and / or fan speed corresponding to that numerical range (i.e., the target calibrated cooling capacity) are the control parameters to be executed.

[0065] The standard refrigeration equipment can be the same as the refrigeration equipment that applies the method provided in this embodiment, or both can have the same product configuration or the same product model.

[0066] In this embodiment, the control parameters to be executed are determined by a pre-calibrated calibration mapping file, which can quickly determine the control parameters to be executed without complicated calculations.

[0067] In some embodiments, the temperature control method further includes: Obtain the power consumption of the standard refrigeration equipment at each output cooling capacity and with each damper opening matched to different fan speeds; the output cooling capacity includes the cooling capacity output within a preset time period; For each type of output cooling capacity, select the damper opening and matching fan speed that minimize power consumption, and generate a calibration mapping file.

[0068] It should be noted that, during the process of generating the calibration mapping file through calibration, the calibration can be performed with the goal of minimizing power consumption.

[0069] The output cooling capacity during the calibration process is the cooling capacity that the refrigeration equipment needs to output to the refrigerated space. In some embodiments, multiple different output cooling capacities can be set according to requirements. For example, based on experience, the cooling capacities that occur most frequently in the refrigeration scenario can be determined, and then these frequently occurring cooling capacities can be used as the output cooling capacity during the calibration process.

[0070] Each damper opening degree is matched with a different fan speed, which can be understood as different combinations of damper opening degree and / or fan speed. For example, after setting the damper opening degree to a certain value, setting the fan speed to different values ​​sequentially can determine multiple combinations. Adjusting the damper opening value and continuing to set the fan speed to different values ​​can also determine multiple combinations. And so on, a variety of different combinations can be obtained.

[0071] During the calibration process, the power consumption of each combination can be tested, and then the combination with the lowest power consumption for each output cooling capacity can be selected. The selected combination is then used to generate a calibration mapping file. For example, each selected combination and its corresponding output cooling capacity can be set as a row of calibration information in a mapping table, thereby generating a mapping table with multiple rows of calibration information, i.e., a calibration mapping file.

[0072] In this embodiment of the application, during the calibration process, a set of damper openings and matching fan speeds with the lowest power consumption are selected for each type of output cooling capacity, and a calibration mapping file is generated, thereby enabling the refrigeration equipment to maintain low power consumption during temperature control.

[0073] In some embodiments, determining the control parameters to be executed based on the sum of the first cooling capacity and the second cooling capacity includes: According to the preset energy-saving strategy, calculate the required damper opening and / or fan speed when the sum of the first cooling capacity and the second cooling capacity is output; wherein, the preset energy-saving strategy includes: rules for calculating the damper opening and / or fan speed required to output the calibrated cooling capacity with energy saving as the goal; The calculated damper opening and / or fan speed are determined as the control parameters to be executed.

[0074] It should be noted that the preset energy-saving strategy is a pre-determined calculation rule. Using this calculation rule, it is possible to calculate which damper opening and / or fan speed will result in the lowest or smallest power consumption of the refrigeration equipment when outputting a specified cooling capacity.

[0075] In some embodiments, the information in the calibration mapping file described above can be used for fitting processing to determine the correlation between the specified cooling capacity and the damper opening and / or fan speed under minimum power consumption, i.e., preset energy-saving strategy.

[0076] In some embodiments, the required damper opening and / or fan speed, calculated according to a preset energy-saving strategy, when the sum of the first and second cooling capacities is output, includes: According to the preset energy-saving strategy, the output cooling capacity of the refrigeration equipment is determined when the current damper opening is within the damper opening range and the current fan speed is within the fan speed range. When the output cooling capacity of the refrigeration equipment is greater than or equal to the sum of the first cooling capacity and the second cooling capacity, select the damper opening closest to the maximum value in the damper opening range and the fan speed closest to the minimum value in the fan speed range as the required damper opening and / or fan speed. The output cooling capacity includes the cooling capacity output within a preset time period.

[0077] Since the power consumption of a fan is proportional to the cube of its rotational speed, the damper opening can be increased and the fan speed reduced, provided that the cooling capacity requirement is met.

[0078] In this embodiment, an energy-saving strategy can be predetermined, thereby calculating the control parameters to be executed based on the sum of the first cooling capacity and the second cooling capacity, which provides greater flexibility.

[0079] In some embodiments, after adjusting the output of the refrigeration equipment according to the sum of the first cooling capacity and the second cooling capacity, the temperature control method further includes: Every target time interval, the first and second cooling capacities are updated based on the latest monitored temperature of the target space, and the output of the refrigeration equipment is readjusted based on the updated first and second cooling capacities.

[0080] It should be noted that the target time can be any preset duration. For example, the target time can be 5 minutes, 10 minutes, but is not limited to these.

[0081] Understandably, after the refrigeration equipment adjusts its output based on the sum of the first and second cooling capacities, the temperature of the target space will typically change. This temperature change will be detected by the temperature sensor. The latest detected temperature can be used as the current temperature of the target space to update or recalculate the first and second cooling capacities, resulting in different calculation results. Then, the output of the refrigeration equipment can be readjusted based on the latest calculation results, forming a closed-loop control system.

[0082] In this embodiment, a closed-loop control circuit can be formed to achieve continuous, high-precision, and high-stability temperature control.

[0083] In some embodiments, before determining a first cooling amount required to maintain the temperature of the target space at the target temperature, the temperature control method further includes: Receive the target temperature input by the user.

[0084] It should be noted that the target temperature can be determined by the user. The user can input a specific temperature according to their needs, and the refrigeration equipment will use this input as the target temperature. For example, the refrigeration equipment may have a temperature input function, which the user can use to input the target temperature. The user can input the target temperature directly into the refrigeration equipment, or through the equipment's remote control or a higher-level system.

[0085] In some embodiments, the target temperature may also be a fixed temperature preset in the refrigeration device. For example, when the refrigeration device is a refrigerator, a fixed temperature can be set for the freezer compartment, and this fixed temperature can then be used as the target temperature.

[0086] Based on the same principle as the method provided in the embodiments of this application, the embodiments of this application also provide a temperature control system, including: a heat load calculation model, a PID controller, a signal superposition unit, and a cooling capacity-actuator mapping model; this temperature control system can be applied to refrigeration equipment, and the temperature control of the refrigeration equipment is achieved through the method provided in the above embodiments, the specific process as follows: Figure 2 As shown, it includes: When the temperature control system is turned on or a cycle begins, step S201 is executed to read sensor data. This sensor data includes the current temperature of the target space of the refrigeration equipment. Temperature outside the target space Then, the cooling capacity is calculated separately through two branches.

[0087] Branch 1: Execute S202 to obtain the set temperature. Execute S203 to output the feedforward cooling demand using the heat load calculation model. For example, the feedforward cooling demand can be calculated using Formula 1 above. (Equivalent to the first cooling capacity in the above embodiment). Among them, branch one serves as a feedforward control channel, used for active prediction and main control.

[0088] Branch 2: Execute S204 to calculate the temperature deviation, where the temperature deviation e = The difference is obtained. Execute S205, and the PID controller outputs the compensation cooling capacity. This compensated cooling capacity is equivalent to the second cooling capacity in the above embodiment; the calculation process will not be repeated here. Branch two serves as a feedback control channel for fine-tuning and eliminating deviations.

[0089] It is understandable that the execution order of the above branch one and branch two is not limited. Either one can be executed first, and then the other can be executed, or both can be executed simultaneously.

[0090] Execute S206 to calculate the final cooling capacity using a signal superposition unit. ,Right now .

[0091] Execute S207, processing the cooling capacity-actuator mapping model and energy-saving strategies. For example, the cooling capacity-actuator mapping model internally stores the correspondence between damper opening, fan speed, and output cooling capacity (which can be obtained through experimental calibration), and then based on... Determine the relevant parameters, namely the control parameters to be executed in the above embodiments, or you can directly output the damper opening command. Fan speed command For example, energy-saving strategies can also be used to directly generate damper opening commands. Fan speed command .

[0092] In accordance with S208, the damper actuator executes the damper opening command. Adjust the damper to the precise angle.

[0093] Executing S209, the fan inverter executes the fan speed command. The drive motor operates at a precise speed.

[0094] The damper actuator and the fan frequency converter work together to change the amount of cold air delivered to the target space, thereby affecting the current temperature of the target space, and wait for the next control cycle to repeatedly execute the aforementioned S201~S209.

[0095] In this embodiment, the feedforward control channel provides advanced regulation with a response speed far exceeding that of a pure feedback system. The feedback control channel can reduce the system's steady-state error and improve temperature control accuracy. Through the derivative action of the PID controller in both the feedforward and feedback control channels, the system overshoot is smaller, the anti-interference capability is stronger, the robustness is better, and the energy consumption of the refrigeration equipment can be significantly reduced.

[0096] Based on the same principle as the method provided in the embodiments of this application, the embodiments of this application also provide a temperature control device for a refrigeration device, such as... Figure 3 As shown, the temperature control device includes: The first calculation module 301 is used to determine the first cooling capacity required to maintain the temperature of the target space at the target temperature; wherein, the target space is the cooling space of the refrigeration equipment; The second calculation module 302 is used to calculate the required second cooling capacity based on the deviation between the target temperature and the current temperature of the target space using proportional-integral-derivative PID control. Temperature control module 303 is used to adjust the output of the refrigeration equipment according to the sum of the first cooling capacity and the second cooling capacity.

[0097] In some embodiments, the temperature control module 303 includes: The control parameter unit is used to determine the control parameters to be executed based on the sum of the first cooling capacity and the second cooling capacity. The control parameters to be executed include: damper opening and / or fan speed. Temperature control unit, used to control the operation of damper components and / or fan components of refrigeration equipment according to the control parameters to be executed.

[0098] In some embodiments, the control parameter unit is specifically used for: Determine the target calibrated cooling capacity corresponding to the sum of the first and second cooling capacities in the calibration mapping file; wherein, the calibration mapping file includes: multiple calibrated cooling capacities, the damper opening and / or fan speed required for each calibrated cooling capacity output by the calibrated refrigeration equipment; The damper opening and / or fan speed corresponding to the target calibrated cooling capacity are determined as the control parameters to be executed.

[0099] In some embodiments, the temperature control device further includes: a calibration module, used for: Obtain the power consumption of the standard refrigeration equipment at each output cooling capacity and with each damper opening matched to different fan speeds; the output cooling capacity includes the cooling capacity output within a preset time period; For each type of output cooling capacity, select the damper opening and matching fan speed that minimize power consumption, and generate a calibration mapping file.

[0100] In some embodiments, the control parameter unit is specifically used for: According to the preset energy-saving strategy, calculate the required damper opening and / or fan speed when the sum of the first cooling capacity and the second cooling capacity is output; wherein, the preset energy-saving strategy includes: rules for calculating the damper opening and / or fan speed required to output the calibrated cooling capacity with energy saving as the goal; The calculated damper opening and / or fan speed are determined as the control parameters to be executed.

[0101] In some embodiments, the control parameter unit is specifically used for: According to the preset energy-saving strategy, the output cooling capacity of the refrigeration equipment is determined when the current damper opening is within the damper opening range and the current fan speed is within the fan speed range. When the output cooling capacity of the refrigeration equipment is greater than or equal to the sum of the first cooling capacity and the second cooling capacity, select the damper opening closest to the maximum value in the damper opening range and the fan speed closest to the minimum value in the fan speed range as the required damper opening and / or fan speed. The output cooling capacity includes the cooling capacity output within a preset time period.

[0102] In some embodiments, the temperature control device further includes: The update module is used to update the first cooling capacity and the second cooling capacity based on the latest monitored temperature of the target space at target intervals, and to readjust the output of the refrigeration equipment based on the updated first cooling capacity and second cooling capacity.

[0103] In some embodiments, the temperature control device further includes: The receiving module is used to receive the target temperature input by the user.

[0104] The temperature control device for the refrigeration equipment provided in this application embodiment can achieve… Figures 1 to 2 The various processes implemented in the method embodiments are not described in detail here to avoid repetition.

[0105] The temperature control device for the refrigeration equipment provided in this application determines, through temperature control method one, the first cooling capacity required to maintain the temperature of the refrigeration space at a target temperature. Then, based on the deviation between the target temperature and the current temperature of the target space, it calculates, through temperature control method two, the second cooling capacity required to adjust the temperature of the refrigeration space to the target temperature under PID regulation. Finally, using the sum of the first and second cooling capacities as the target, the output of the refrigeration equipment is adjusted. Throughout the temperature control process, the combination of these two temperature control methods results in excellent practical performance for the refrigeration equipment, demonstrating a balanced performance in terms of response speed, anti-interference, robustness, and energy saving. Furthermore, compared to simple PID regulation, the embodiments of this application exhibit smaller overshoot and stronger anti-interference capability and robustness.

[0106] The temperature control device of the refrigeration equipment in this application embodiment can execute the temperature control method of the refrigeration equipment provided in this application embodiment. The implementation principle is similar. The actions performed by each module and unit in the temperature control device of the refrigeration equipment in each embodiment of this application are corresponding to the steps in the temperature control method of the refrigeration equipment in each embodiment of this application. For detailed functional descriptions of each module of the temperature control device of the refrigeration equipment, please refer to the descriptions of the corresponding temperature control methods of the refrigeration equipment shown above, which will not be repeated here.

[0107] Based on the same principles as the methods shown in the embodiments of this application, the embodiments of this application also provide a refrigeration device, which may include, but is not limited to: a processor and a memory; the memory for storing computer programs; and the processor for executing the temperature control method of the refrigeration device shown in any optional embodiment of this application by calling the computer program.

[0108] In an optional embodiment, a refrigeration device, such as... Figure 4 As shown, Figure 4 The cooling device 4000 shown includes a processor 4001 and a memory 4003. The processor 4001 and the memory 4003 are connected, for example, via a bus 4002. Optionally, the cooling device 4000 may further include a transceiver 4004, which can be used for data interaction between the cooling device and other electronic devices, such as sending and / or receiving data. It should be noted that in practical applications, the transceiver 4004 is not limited to one type, and the structure of the cooling device 4000 does not constitute a limitation on the embodiments of this application.

[0109] Processor 4001 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. Processor 4001 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0110] Bus 4002 may include a pathway for transmitting information between the aforementioned components. Bus 4002 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Bus 4002 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0111] The memory 4003 may be ROM (Read Only Memory) or other types of static storage devices capable of storing static information and instructions, RAM (Random Access Memory) or other types of dynamic storage devices capable of storing information and instructions, or EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media, other magnetic storage devices, or any other medium capable of carrying or storing computer programs and capable of being read by a computer, without limitation herein.

[0112] The memory 4003 stores computer programs that execute embodiments of this application, and its execution is controlled by the processor 4001. The processor 4001 executes the computer programs stored in the memory 4003 to implement the steps shown in the foregoing method embodiments.

[0113] Figure 4 The refrigeration device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments of this application.

[0114] This application provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it can implement the steps and corresponding content of the aforementioned method embodiments.

[0115] This application also provides a computer program product, including a computer program that, when executed by a processor, can implement the steps and corresponding content of the aforementioned method embodiments.

[0116] The terms "first," "second," "third," "fourth," "1," "2," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than that shown in the illustrations or text descriptions.

[0117] It should be understood that although arrows indicate various operation steps in the flowcharts of this application's embodiments, the order in which these steps are implemented is not limited to the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of this application's embodiments, the implementation steps in each flowchart can be executed in other orders as required. Furthermore, some or all steps in each flowchart, based on the actual implementation scenario, may include multiple sub-steps or multiple stages. Some or all of these sub-steps or stages can be executed at the same time, and each sub-step or stage can also be executed at different times. In scenarios where execution times differ, the execution order of these sub-steps or stages can be flexibly configured according to requirements, and this application's embodiments do not limit this.

[0118] The above description is only an optional implementation method for some implementation scenarios of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application without departing from the technical concept of this application also fall within the protection scope of the embodiments of this application.

Claims

1. A temperature control method for a refrigeration device, characterized in that, The temperature control method includes: Determine the first cooling capacity required to maintain the temperature of the target space at the target temperature; wherein, the target space is the cooling space of the refrigeration device; Based on the deviation between the target temperature and the current temperature of the target space, the required second cooling capacity is calculated using proportional-integral-derivative (PID) control. The output of the refrigeration equipment is adjusted according to the sum of the first cooling capacity and the second cooling capacity.

2. The temperature control method according to claim 1, characterized in that, Adjusting the output of the refrigeration equipment based on the sum of the first cooling capacity and the second cooling capacity includes: Based on the sum of the first cooling capacity and the second cooling capacity, the control parameters to be executed are determined, including: damper opening and / or fan speed; The damper components and / or fan components of the refrigeration equipment are controlled to operate according to the control parameters to be executed.

3. The temperature control method according to claim 2, characterized in that, Based on the sum of the first cooling capacity and the second cooling capacity, the control parameters to be executed are determined, including: Determine the target calibrated cooling capacity corresponding to the sum of the first cooling capacity and the second cooling capacity in the calibration mapping file; wherein, the calibration mapping file includes: multiple calibrated cooling capacities, damper opening and / or fan speed required for the calibrated cooling equipment to output each calibrated cooling capacity; The damper opening and / or fan speed corresponding to the target calibrated cooling capacity are determined as the control parameters to be executed.

4. The temperature control method according to claim 3, characterized in that, The temperature control method further includes: The power consumption of the calibrated refrigeration equipment is obtained for each output cooling capacity and each damper opening matched with different fan speeds; the output cooling capacity includes the cooling capacity output within a preset time period. For each type of output cooling capacity, select the damper opening and matching fan speed that minimize power consumption, and generate the calibration mapping file.

5. The temperature control method according to claim 2, characterized in that, Based on the sum of the first cooling capacity and the second cooling capacity, the control parameters to be executed are determined, including: According to a preset energy-saving strategy, the required damper opening and / or fan speed are calculated when the sum of the first cooling capacity and the second cooling capacity is output; wherein, the preset energy-saving strategy includes: a rule for calculating the damper opening and / or fan speed required to output the calibrated cooling capacity with energy saving as the goal; The calculated damper opening and / or fan speed are determined as the control parameters to be executed.

6. The temperature control method according to claim 5, characterized in that, Based on the preset energy-saving strategy, calculate the required damper opening and / or fan speed when the sum of the first and second cooling capacities is output, including: According to the preset energy-saving strategy, when the current damper opening of the refrigeration equipment is within the damper opening range and the current fan speed is within the fan speed range, the output cooling capacity of the refrigeration equipment is determined. When the output cooling capacity of the refrigeration equipment is greater than or equal to the sum of the first cooling capacity and the second cooling capacity, the damper opening closest to the maximum value in the damper opening range and the fan speed closest to the minimum value in the fan speed range are selected as the required damper opening and / or fan speed. The output cooling capacity includes the cooling capacity output within a preset time period.

7. The temperature control method according to claim 1, characterized in that, After adjusting the output of the refrigeration equipment based on the sum of the first cooling capacity and the second cooling capacity, the temperature control method further includes: At target intervals, the first cooling capacity and the second cooling capacity are updated based on the latest monitored temperature of the target space, and the output of the refrigeration equipment is readjusted based on the updated first cooling capacity and the second cooling capacity.

8. A temperature control device for a refrigeration equipment, characterized in that, The temperature control device includes: A first calculation module is used to determine a first cooling capacity required to maintain the temperature of the target space at the target temperature; wherein the target space is the cooling space of the refrigeration device; The second calculation module is used to calculate the required second cooling capacity based on the deviation between the target temperature and the current temperature of the target space using proportional-integral-derivative (PID) adjustment. The temperature control module is used to adjust the output of the refrigeration equipment according to the sum of the first cooling capacity and the second cooling capacity.

9. The temperature control device according to claim 8, characterized in that, The temperature control module includes: The control parameter unit is used to determine the control parameters to be executed based on the sum of the first cooling capacity and the second cooling capacity. The control parameters to be executed include: damper opening and / or fan speed. A temperature control unit is used to control the operation of the damper components and / or fan components of the refrigeration equipment according to the control parameters to be executed.

10. The temperature control device according to claim 9, characterized in that, The control parameter unit is specifically used for: Determine the target calibrated cooling capacity corresponding to the sum of the first cooling capacity and the second cooling capacity in the calibration mapping file; wherein, the calibration mapping file includes: multiple calibrated cooling capacities, damper opening and / or fan speed required for the calibrated cooling equipment to output each calibrated cooling capacity; The damper opening and / or fan speed corresponding to the target calibrated cooling capacity are determined as the control parameters to be executed.

11. The temperature control device according to claim 9, characterized in that, The control parameter unit is specifically used for: According to a preset energy-saving strategy, the required damper opening and / or fan speed are calculated when the sum of the first cooling capacity and the second cooling capacity is output; wherein, the preset energy-saving strategy includes: a rule for calculating the damper opening and / or fan speed required to output the calibrated cooling capacity with energy saving as the goal; The calculated damper opening and / or fan speed are determined as the control parameters to be executed.

12. The temperature control device according to claim 8, characterized in that, The temperature control device further includes: An update module is used to update the first cooling capacity and the second cooling capacity based on the latest monitored temperature of the target space at target intervals, and to readjust the output of the refrigeration equipment based on the updated first cooling capacity and the second cooling capacity.

13. A refrigeration device, characterized in that, The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the temperature control method of the refrigeration device according to any one of claims 1 to 7.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the temperature control method of the refrigeration device according to any one of claims 1 to 7.

15. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the temperature control method of the refrigeration device according to any one of claims 1 to 7.

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