Control method for reducing temperature fluctuation of refrigerating chamber of refrigerator and refrigerator
By adding a semiconductor refrigeration device to the air-cooled refrigerator and dynamically adjusting the refrigeration level, the problem of temperature fluctuation in the refrigerator compartment during defrosting and under sudden heat load scenarios is solved, thereby improving temperature stability and energy efficiency.
Patent Information
- Application Number
- CN202511278739.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2025-10-28
AI Technical Summary
During defrosting and under sudden heat loads, the temperature fluctuations in the refrigerator compartment of a frost-free refrigerator can be too large, affecting its preservation effect.
A semiconductor refrigeration device is added as a second refrigeration source. The refrigeration level is dynamically adjusted during defrosting cycles and sudden heat loads. Temperature sensors monitor and control temperature changes in the refrigerator compartment, providing auxiliary refrigeration to suppress temperature fluctuations.
It effectively suppresses temperature fluctuations in the refrigerator compartment during defrosting and under sudden heat load scenarios, maintains temperature stability, and reduces energy consumption.
Smart Images
Figure CN120846010A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of refrigerator technology, and in particular to a control method for reducing temperature fluctuations in the refrigerator compartment and a refrigerator. Background Technology
[0002] Frost builds up on the evaporator of frost-free refrigerators due to door opening or moisture evaporation from food inside. When the frost layer accumulates to a critical thickness, cooling efficiency drops significantly, requiring defrosting to maintain performance. Therefore, a solution is urgently needed that can promptly remove frost without affecting the temperature stability of the refrigerator compartment.
[0003] To address the defrosting requirements of the evaporator, a defrosting heater is currently used to perform the defrosting operation: when the frost layer reaches a set thickness, the heater is activated to melt the frost layer. During this process, the compressor stops running, but the heat generated by the defrosting heater is transferred to the refrigerator compartment through radiation.
[0004] The heat radiation generated by the defrosting process will directly cause the refrigerator compartment temperature to rise. Especially when sudden changes in heat load (such as placing hot food in the refrigerator all at once) coincide with the defrosting cycle, the refrigerator compartment temperature will fluctuate drastically. How to suppress the temperature fluctuations in the refrigerator compartment during defrosting and under sudden heat load scenarios has become a key bottleneck in improving the preservation effect. Summary of the Invention
[0005] This application provides a control method and a refrigerator for reducing temperature fluctuations in the refrigerator compartment, in order to solve the problem of excessive temperature fluctuations in the refrigerator compartment during defrosting and sudden heat load scenarios.
[0006] The first aspect of this application provides a method for reducing temperature fluctuations in a refrigerator compartment, the method comprising:
[0007] After the refrigerator's compressor cooling system starts, determine whether the refrigerator is in a defrosting cycle;
[0008] If the refrigerator is in a defrost cycle, the semiconductor refrigeration unit is controlled to cool the refrigerator compartment at the same time as the defrost command is sent.
[0009] The cooling level of the semiconductor refrigeration device is dynamically adjusted based on the temperature changes detected by the temperature sensor in the refrigerator compartment, so that the temperature changes in the refrigerator compartment do not exceed the preset temperature fluctuation range.
[0010] When the defrosting cycle ends, the semiconductor refrigeration device is controlled to stop refrigeration;
[0011] If the refrigerator is not in the defrost cycle, the rate of temperature change in the refrigerator compartment is obtained based on the temperature change detected by the temperature sensor.
[0012] Determine whether the rate of temperature change in the refrigeration compartment exceeds a preset temperature change rate threshold;
[0013] If the temperature change rate inside the refrigerator exceeds a preset temperature change rate threshold, the semiconductor refrigeration device is controlled to provide auxiliary refrigeration to the refrigerator.
[0014] When the temperature inside the refrigerator reaches the refrigerator's shutdown temperature, the semiconductor refrigeration device is controlled to stop refrigeration.
[0015] This application provides a second cooling source in addition to the compressor refrigeration system by adding a semiconductor refrigeration device. The semiconductor refrigeration device provides auxiliary cooling to the refrigerator compartment during the defrosting cycle and in the case of sudden heat load. It also dynamically adjusts the refrigeration level to suppress the temperature rise of the refrigerator compartment during defrosting and accelerate the cooling of the refrigerator compartment. This solves the problem of excessive temperature fluctuation in the refrigerator compartment during defrosting and in the case of sudden heat load.
[0016] Optionally, the step of dynamically adjusting the cooling level of the semiconductor refrigeration device based on temperature changes detected by a temperature sensor inside the refrigerator includes:
[0017] When the temperature change rate in the refrigerator compartment exceeds a preset temperature change rate threshold, the first cooling setting of the semiconductor refrigeration device is activated.
[0018] When the temperature change in the refrigerator compartment is within a preset temperature fluctuation range threshold, the second cooling setting of the semiconductor refrigeration device is activated.
[0019] The input power of the first cooling setting is higher than that of the second cooling setting.
[0020] The above steps automatically switch between different input power cooling levels based on the temperature change rate of the refrigerator compartment. This provides stronger cooling capacity when the temperature fluctuates significantly and weaker cooling capacity when the temperature fluctuates less, thereby improving the precise control of the refrigerator compartment temperature and helping to maintain temperature changes within a preset range.
[0021] Optionally, the steps to determine whether the refrigerator is in a defrost cycle include:
[0022] When the refrigerator enters the preset defrost time window and the temperature rise in the refrigerator compartment exceeds the preset defrost temperature threshold, the refrigerator is determined to be in a defrost cycle.
[0023] When the refrigerator enters the preset defrost time window, but the temperature rise in the refrigerator compartment does not exceed the preset defrost temperature threshold, the refrigerator is determined not to be in a defrost cycle.
[0024] The above judgment method combines the preset defrost time window with the actual temperature rise trend of the refrigerator compartment for comprehensive judgment, which can more accurately identify the actual start of the defrost cycle, thereby reducing unnecessary defrost operations, helping to reduce energy consumption and maintain the stability of the refrigerator compartment temperature.
[0025] Optionally, the step of determining whether the temperature change rate inside the refrigerator exceeds a preset temperature change rate threshold includes:
[0026] If the temperature rise in the refrigerator compartment exceeds a preset temperature rise value within a preset time interval, the semiconductor refrigeration device is controlled to provide auxiliary refrigeration to the refrigerator compartment.
[0027] If the temperature rise in the refrigerator compartment is detected within a preset time interval but does not exceed the preset temperature rise value, the current cooling setting will be maintained to keep the temperature in the refrigerator compartment stable.
[0028] By monitoring temperature changes within a preset time interval, auxiliary cooling can be activated in a timely manner when the temperature rises rapidly, thereby suppressing temperature fluctuations; at the same time, the existing cooling state is maintained when the temperature rise is small, which helps to reduce unnecessary energy consumption and improve the stability of the refrigerator compartment temperature.
[0029] Optionally, the method further includes:
[0030] The temperature inside the freezer compartment is collected using a second temperature sensor;
[0031] When the temperature inside the freezer reaches the freezer's shutdown temperature, the compressor refrigeration system is shut down.
[0032] By monitoring the freezer temperature and shutting off the compressor refrigeration system when the set temperature is reached, it helps reduce the compressor's operating energy consumption, decreases the number of system start-ups and shutdowns, thereby improving overall energy efficiency and reducing interference with the refrigerator compartment temperature.
[0033] The second aspect of this application provides a refrigerator for reducing temperature fluctuations in the refrigerator compartment, applied to the control method for reducing temperature fluctuations in the refrigerator compartment described in the first aspect. The refrigerator includes: a refrigerator compartment, a compressor refrigeration system, a semiconductor refrigeration device, a temperature sensor, and a controller.
[0034] The semiconductor refrigeration device and the temperature sensor are disposed in the refrigerator compartment. The controller is communicatively connected to the compressor refrigeration system, the semiconductor refrigeration device, and the temperature sensor, respectively. The controller is configured to:
[0035] After the refrigerator's compressor cooling system starts, determine whether the refrigerator is in a defrosting cycle;
[0036] If the refrigerator is in a defrost cycle, the semiconductor refrigeration unit is controlled to cool the refrigerator compartment at the same time as the defrost command is sent.
[0037] The cooling level of the semiconductor refrigeration device is dynamically adjusted based on the temperature changes detected by the temperature sensor in the refrigerator compartment, so that the temperature changes in the refrigerator compartment do not exceed the preset temperature fluctuation range.
[0038] When the defrosting cycle ends, the semiconductor refrigeration device is controlled to stop refrigeration;
[0039] If the refrigerator is not in the defrost cycle, the rate of temperature change in the refrigerator compartment is obtained based on the temperature change detected by the temperature sensor.
[0040] Determine whether the rate of temperature change in the refrigeration compartment exceeds a preset temperature change rate threshold;
[0041] If the temperature change rate inside the refrigerator exceeds a preset temperature change rate threshold, the semiconductor refrigeration device is controlled to provide auxiliary refrigeration to the refrigerator.
[0042] When the temperature inside the refrigerator reaches the refrigerator's shutdown temperature, the semiconductor refrigeration device is controlled to stop refrigeration.
[0043] By configuring a semiconductor refrigeration device and controller that work in conjunction with the compressor refrigeration system, auxiliary refrigeration can be activated and the refrigeration intensity can be dynamically adjusted during defrosting cycles or sudden heat load scenarios. This reduces temperature fluctuations in the refrigerator compartment, helps maintain the stability of the refrigerator compartment temperature within a preset range, and reduces overall energy consumption.
[0044] Optionally, the semiconductor refrigeration device includes multiple refrigeration levels. The semiconductor refrigeration device is connected to the temperature sensor to receive real-time temperature change data in the refrigerator compartment and dynamically adjust the working intensity of the semiconductor refrigeration device based on the temperature change data.
[0045] The semiconductor refrigeration device can automatically adjust its refrigeration intensity based on the real-time temperature data of the refrigerator compartment, thereby achieving more precise control over the temperature of the refrigerator compartment, which helps to reduce temperature fluctuations, improve temperature stability, and reduce energy consumption.
[0046] Optionally, the temperature sensor is a digital temperature probe, which is installed on the inner wall of the refrigerator compartment to accurately monitor temperature changes and temperature values.
[0047] The temperature sensor is a digital temperature probe, which can improve the monitoring accuracy of internal temperature changes and temperature values, thereby providing a more accurate data basis for refrigeration control and helping to improve the response speed and control accuracy of temperature regulation.
[0048] Optionally, the controller includes a microprocessor unit, which stores a preset temperature change rate threshold and a preset temperature fluctuation range parameter, and generates a control signal based on the temperature data obtained by the temperature sensor and outputs it to the semiconductor refrigeration device.
[0049] The microprocessor unit stores preset control parameters and generates control signals based on real-time temperature data, enabling more precise regulation of the semiconductor refrigeration device. This improves the responsiveness to temperature changes in the refrigerator compartment, helps reduce temperature fluctuations, and reduces energy consumption.
[0050] Optionally, the compressor refrigeration system includes a compressor, an evaporator, and a refrigerator compartment damper;
[0051] The compressor and the evaporator are connected by refrigeration pipes to form a refrigerant circulation loop, which is used to provide cooling capacity for the refrigerator compartment and the freezer compartment;
[0052] The refrigeration compartment damper is located on the side of the refrigeration pipeline near the refrigeration compartment and is used to control the amount of cold air supplied to the refrigeration compartment.
[0053] The compressor refrigeration system forms a refrigeration cycle through a compressor, evaporator, and refrigeration pipes to provide cooling capacity to the refrigerator and freezer compartments. The refrigerator compartment damper can regulate the amount of cold air supplied to the refrigerator compartment, thereby controlling the cooling intensity of the refrigerator compartment, which helps to reduce temperature fluctuations in the refrigerator compartment and reduce system energy consumption.
[0054] As can be seen from the above technical solutions, this application provides a control method and a refrigerator for reducing temperature fluctuations in the refrigerator compartment. After the refrigerator's compressor refrigeration system is started, it is determined whether the refrigerator is in a defrost cycle. If the refrigerator is in a defrost cycle, a defrost command is sent while controlling the semiconductor refrigeration device to refrigerate the refrigerator compartment. The refrigeration level of the semiconductor refrigeration device is dynamically adjusted based on the temperature changes detected by the temperature sensor in the refrigerator compartment, so that the temperature changes in the refrigerator compartment do not exceed a preset temperature fluctuation range. When the defrost cycle ends, the semiconductor refrigeration device is controlled to stop refrigeration. If the refrigerator is not in a defrost cycle, the temperature change rate in the refrigerator compartment is obtained based on the temperature changes detected by the temperature sensor. It is determined whether the temperature change rate in the refrigerator compartment exceeds a preset temperature change rate threshold. If the temperature change rate in the refrigerator compartment exceeds the preset temperature change rate threshold, the semiconductor refrigeration device is controlled to provide auxiliary refrigeration for the refrigerator compartment. When the temperature in the refrigerator compartment reaches the refrigerator compartment shutdown point temperature, the semiconductor refrigeration device is controlled to stop refrigeration, thereby solving the problem of excessive temperature fluctuations in the refrigerator compartment during defrost and sudden heat load scenarios. Attached Figure Description
[0055] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0056] Figure 1 This is a flowchart illustrating a method for controlling temperature fluctuations in a refrigerator compartment, as provided in an embodiment of this application. Detailed Implementation
[0057] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application.
[0058] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.
[0059] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.
[0060] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.
[0061] In this embodiment of the application, the air-cooled refrigerator includes a refrigerator compartment and a freezer compartment.
[0062] The primary function of the refrigerator compartment is preservation. It is typically located in the upper part of a frost-free refrigerator and is designed to maintain a temperature above 0°C, usually between 2°C and 8°C. This temperature range is sufficient to slow the growth of bacteria in food, thereby extending its shelf life while preserving its freshness and taste. Various perishable foods, such as vegetables, fruits, dairy products, cooked meats, and leftovers, can be stored in the refrigerator compartment.
[0063] The primary function of the freezer compartment is to freeze and store food for extended periods. It is typically located in the lower half of a frost-free refrigerator and is designed to operate at temperatures well below 0°C, generally below -18°C. At this extremely low temperature, the moisture in food freezes rapidly, effectively preventing bacterial growth and allowing food to be preserved for a long time without spoiling. Meat, fish, ice cream, and frozen foods can be stored in the freezer compartment for extended periods.
[0064] In frost-free refrigerators, frost can easily form on the evaporator due to door opening or moisture evaporation from food inside. When the frost layer accumulates to a critical thickness, the cooling efficiency drops significantly, requiring defrosting to maintain cooling performance. Currently, a defrosting heater is used to perform this defrosting operation: when the frost layer reaches a set thickness, the heater is activated to melt the frost. During this process, the compressor stops running, but the heat generated by the defrosting heater is transferred to the refrigerator compartment via radiation.
[0065] The heat radiation generated by the defrosting process will directly cause the refrigerator compartment temperature to rise. Especially when sudden changes in heat load (such as placing hot food in the refrigerator all at once) coincide with the defrosting cycle, the refrigerator compartment temperature will fluctuate drastically. How to suppress the temperature fluctuations in the refrigerator compartment during defrosting and under sudden heat load scenarios has become a key bottleneck in improving the preservation effect.
[0066] To address the issue of excessive temperature fluctuations in the refrigerator compartment during defrosting and sudden heat loads, see [link to relevant documentation]. Figure 1 This application provides a method for controlling temperature fluctuations in a refrigerator's cold compartment, comprising:
[0067] S100: Determines whether the refrigerator is in a defrosting cycle after the refrigerator's compressor refrigeration system starts.
[0068] In some embodiments, the step of determining whether the refrigerator is in a defrost cycle includes:
[0069] When the refrigerator enters the preset defrost time window and the temperature rise in the refrigerator compartment exceeds the preset defrost temperature threshold, the refrigerator is determined to be in a defrost cycle.
[0070] When the refrigerator enters the preset defrost time window, but the temperature rise in the refrigerator compartment does not exceed the preset defrost temperature threshold, the refrigerator is determined not to be in a defrost cycle.
[0071] It should be understood that the preset defrost time window refers to a time range within a specific period that the refrigerator system pre-sets to determine whether to enter defrost mode. This time window is typically set based on a comprehensive consideration of factors such as the refrigerator's historical operating data, ambient temperature, humidity, and the type and quantity of food in the refrigerator compartment. By setting such a time window, unnecessary defrosting operations can be reduced while ensuring the refrigerator operates normally, thereby saving energy and improving refrigeration efficiency. The preset defrost temperature threshold, on the other hand, refers to the critical temperature at which the system determines the refrigerator should enter a defrost cycle when the temperature inside the refrigerator compartment reaches or exceeds this value. Setting this threshold also requires consideration of various factors, such as the preservation requirements of the food in the refrigerator compartment, the refrigerator's operating efficiency, and external environmental conditions. By setting a reasonable defrost temperature threshold, temperature fluctuations in the refrigerator compartment can be effectively controlled while ensuring food freshness.
[0072] The above judgment method combines the preset defrost time window with the actual temperature rise trend of the refrigerator compartment for comprehensive judgment, which can more accurately identify the actual start of the defrost cycle, thereby reducing unnecessary defrost operations, helping to reduce energy consumption and maintain the stability of the refrigerator compartment temperature.
[0073] S200: If the refrigerator is in a defrosting cycle, the semiconductor refrigeration unit is controlled to cool the refrigerator compartment while the defrosting command is sent.
[0074] It should be understood that the semiconductor refrigeration device is located inside the refrigerator compartment and serves as a refrigeration source solely for the refrigerator compartment. Sending a defrost command controls the defrost heater to remove frost from the evaporator. Simultaneously, controlling the semiconductor refrigeration device to start effectively balances the temperature rise caused by defrost heating through its cooling effect on the refrigerator compartment, thereby maintaining a relatively stable temperature inside the refrigerator compartment.
[0075] S300: Based on the temperature change in the refrigerator compartment detected by the temperature sensor, the cooling level of the semiconductor refrigeration device is dynamically adjusted so that the temperature change in the refrigerator compartment does not exceed the preset temperature fluctuation range.
[0076] It should be understood that the preset temperature fluctuation range is determined based on the food preservation requirements and the user-set target temperature for the refrigerator compartment. It is generally set to a relatively small temperature range to ensure that the food maintains optimal freshness during refrigeration. For example, if the user sets the target temperature for the refrigerator compartment to 4 degrees Celsius, the preset temperature fluctuation range might be set to ±0.5 degrees Celsius, meaning the actual temperature of the refrigerator compartment should fluctuate between 3.5 and 4.5 degrees Celsius to maintain the freshness of the food and the temperature stability of the refrigerator compartment. By dynamically adjusting the cooling setting of the semiconductor refrigeration unit, the system can flexibly respond to changes in temperature within the refrigerator compartment, ensuring that temperature fluctuations are always controlled within the preset range.
[0077] In some embodiments, the step of dynamically adjusting the cooling level of the semiconductor refrigeration device based on temperature changes detected by a temperature sensor in the refrigerator compartment includes:
[0078] When the temperature change rate in the refrigerator compartment exceeds a preset temperature change rate threshold, the first cooling setting of the semiconductor refrigeration device is activated.
[0079] When the temperature change in the refrigerator compartment is within a preset temperature fluctuation range threshold, the second cooling setting of the semiconductor refrigeration device is activated.
[0080] The input power of the first cooling setting is higher than that of the second cooling setting.
[0081] The above steps automatically switch between different input power cooling levels based on the temperature change rate of the refrigerator compartment. This provides stronger cooling capacity when the temperature fluctuates significantly and weaker cooling capacity when the temperature fluctuates less, thereby improving the precise control of the refrigerator compartment temperature and helping to maintain temperature changes within a preset range.
[0082] S400: When the defrosting cycle ends, control the semiconductor refrigeration device to stop refrigeration.
[0083] It should be understood that the defrost cycle refers to the period during which frost accumulates on the evaporator in the refrigerator compartment, requiring cooling to be stopped for defrosting. During this time, the system typically switches to defrost mode, removing the frost from the evaporator through heating or other methods to ensure that the evaporator's heat exchange efficiency is not affected, thereby maintaining the normal cooling effect of the refrigerator compartment. The defrost cycle is usually set based on a variety of factors, including the refrigerator compartment's operating time, humidity conditions, the thickness of the frost layer on the evaporator, and the preservation requirements of the food. By setting a reasonable defrost cycle, the cooling effect and energy consumption of the refrigerator compartment can be effectively balanced, while maintaining the optimal freshness of the food.
[0084] S500: If the refrigerator is not in a defrost cycle, the rate of temperature change in the refrigerator compartment is obtained based on the temperature change detected by the temperature sensor.
[0085] S600: Determine whether the temperature change rate inside the refrigerator exceeds a preset temperature change rate threshold.
[0086] It should be understood that the preset temperature change rate threshold is a reasonable limit value set based on the temperature fluctuation range during normal operation of the refrigerator compartment. It aims to distinguish between normal temperature fluctuations and sudden temperature changes that may be caused by abnormal conditions.
[0087] S700: If the temperature change rate inside the refrigerator exceeds a preset temperature change rate threshold, the semiconductor refrigeration device is controlled to provide auxiliary refrigeration to the refrigerator.
[0088] S800: When the temperature inside the refrigerator reaches the refrigerator's shutdown temperature, the semiconductor refrigeration device is controlled to stop refrigeration.
[0089] It should be understood that the specific temperature at the refrigeration compartment shutdown point can be between 0°C and 5°C.
[0090] This application provides a second cooling source in addition to the compressor refrigeration system by adding a semiconductor refrigeration device. The semiconductor refrigeration device provides auxiliary cooling to the refrigerator compartment during the defrosting cycle and in the case of sudden heat load. It also dynamically adjusts the refrigeration level to suppress the temperature rise of the refrigerator compartment during defrosting and accelerate the cooling of the refrigerator compartment. This solves the problem of excessive temperature fluctuation in the refrigerator compartment during defrosting and in the case of sudden heat load.
[0091] In some embodiments, the step of determining whether the temperature change rate in the refrigerator compartment exceeds a preset temperature change rate threshold includes:
[0092] If the temperature rise in the refrigerator compartment exceeds a preset temperature rise value within a preset time interval, the semiconductor refrigeration device is controlled to provide auxiliary refrigeration to the refrigerator compartment.
[0093] If the temperature rise in the refrigerator compartment is detected within a preset time interval but does not exceed the preset temperature rise value, the current cooling setting will be maintained to keep the temperature in the refrigerator compartment stable.
[0094] It should be understood that the preset time interval can be 2 minutes. The preset temperature rise value can be 2°C. If the temperature rise in the refrigerator compartment exceeds the preset temperature rise value within the preset time interval, it is considered that a lot of food has been put into the refrigerator compartment at once or the food has too high a heat value. In this case, the semiconductor refrigeration device needs to be controlled to provide auxiliary cooling to the refrigerator compartment to lower the temperature inside the refrigerator compartment.
[0095] By monitoring temperature changes within a preset time interval, auxiliary cooling can be activated in a timely manner when the temperature rises rapidly, thereby suppressing temperature fluctuations; at the same time, the existing cooling state is maintained when the temperature rise is small, which helps to reduce unnecessary energy consumption and improve the stability of the refrigerator compartment temperature.
[0096] In some embodiments, the method further includes: acquiring the temperature inside the freezer compartment via a second temperature sensor; and controlling the compressor refrigeration system to shut down when the temperature inside the freezer compartment reaches the freezer compartment shutdown point temperature.
[0097] It should be understood that the specific stop temperature of the freezer compartment can be between -18°C and -20°C.
[0098] By monitoring the freezer temperature and shutting off the compressor refrigeration system when the set temperature is reached, it helps reduce the compressor's operating energy consumption, decreases the number of system start-ups and shutdowns, thereby improving overall energy efficiency and reducing interference with the refrigerator compartment temperature.
[0099] This application also provides a refrigerator for reducing temperature fluctuations in the refrigerator compartment, which is applied to the control method for reducing temperature fluctuations in the refrigerator compartment described in the above embodiments. The refrigerator includes: a refrigerator compartment, a compressor refrigeration system, a semiconductor refrigeration device, a temperature sensor, and a controller.
[0100] The semiconductor refrigeration device and the temperature sensor are disposed in the refrigerator compartment. The controller is communicatively connected to the compressor refrigeration system, the semiconductor refrigeration device, and the temperature sensor, respectively. The controller is configured to:
[0101] After the refrigerator's compressor cooling system starts, determine whether the refrigerator is in a defrosting cycle;
[0102] If the refrigerator is in a defrost cycle, the semiconductor refrigeration unit is controlled to cool the refrigerator compartment at the same time as the defrost command is sent.
[0103] The cooling level of the semiconductor refrigeration device is dynamically adjusted based on the temperature changes detected by the temperature sensor in the refrigerator compartment, so that the temperature changes in the refrigerator compartment do not exceed the preset temperature fluctuation range.
[0104] When the defrosting cycle ends, the semiconductor refrigeration device is controlled to stop refrigeration;
[0105] If the refrigerator is not in the defrost cycle, the rate of temperature change in the refrigerator compartment is obtained based on the temperature change detected by the temperature sensor.
[0106] Determine whether the rate of temperature change in the refrigeration compartment exceeds a preset temperature change rate threshold;
[0107] If the temperature change rate inside the refrigerator exceeds a preset temperature change rate threshold, the semiconductor refrigeration device is controlled to provide auxiliary refrigeration to the refrigerator.
[0108] When the temperature inside the refrigerator reaches the refrigerator's shutdown temperature, the semiconductor refrigeration device is controlled to stop refrigeration.
[0109] By configuring a semiconductor refrigeration device and controller that work in conjunction with the compressor refrigeration system, auxiliary refrigeration can be activated and the refrigeration intensity can be dynamically adjusted during defrosting cycles or sudden heat load scenarios. This reduces temperature fluctuations in the refrigerator compartment, helps maintain the stability of the refrigerator compartment temperature within a preset range, and reduces overall energy consumption.
[0110] In some embodiments, the semiconductor refrigeration device includes multiple refrigeration levels. The semiconductor refrigeration device is connected to the temperature sensor to receive real-time temperature change data in the refrigerator compartment and dynamically adjust the operating intensity of the semiconductor refrigeration device based on the temperature change data.
[0111] The semiconductor refrigeration device can automatically adjust its refrigeration intensity based on the real-time temperature data of the refrigerator compartment, thereby achieving more precise control over the temperature of the refrigerator compartment, which helps to reduce temperature fluctuations, improve temperature stability, and reduce energy consumption.
[0112] In some embodiments, the temperature sensor is a digital temperature probe, which is disposed on the inner wall of the refrigerator compartment for accurately monitoring temperature changes and temperature values.
[0113] The temperature sensor is a digital temperature probe, which can improve the monitoring accuracy of internal temperature changes and temperature values, thereby providing a more accurate data basis for refrigeration control and helping to improve the response speed and control accuracy of temperature regulation.
[0114] In some embodiments, the controller includes a microprocessor unit for storing a preset temperature change rate threshold and a preset temperature fluctuation range parameter, and for generating a control signal based on temperature data acquired by a temperature sensor and outputting it to the semiconductor refrigeration device.
[0115] The microprocessor unit stores preset control parameters and generates control signals based on real-time temperature data, enabling more precise regulation of the semiconductor refrigeration device. This improves the responsiveness to temperature changes in the refrigerator compartment, helps reduce temperature fluctuations, and reduces energy consumption.
[0116] In some embodiments, the compressor refrigeration system includes a compressor, an evaporator, and a refrigerator compartment damper; the compressor and the evaporator are connected by a refrigeration pipeline to form a refrigerant circulation loop for providing cooling capacity to the refrigerator compartment and the freezer compartment; the refrigerator compartment damper is located on the side of the refrigeration pipeline near the refrigerator compartment for controlling the amount of cold air supplied to the refrigerator compartment.
[0117] The compressor refrigeration system forms a refrigeration cycle through a compressor, evaporator, and refrigeration pipes to provide cooling capacity to the refrigerator and freezer compartments. The refrigerator compartment damper can regulate the amount of cold air supplied to the refrigerator compartment, thereby controlling the cooling intensity of the refrigerator compartment, which helps to reduce temperature fluctuations in the refrigerator compartment and reduce system energy consumption.
[0118] As can be seen from the above technical solutions, the embodiments of this application provide a control method and a refrigerator for reducing temperature fluctuations in the refrigerator compartment. After the refrigerator's compressor refrigeration system is started, it is determined whether the refrigerator is in a defrost cycle. If the refrigerator is in a defrost cycle, a defrost command is sent while controlling the semiconductor refrigeration device to refrigerate the refrigerator compartment. The refrigeration level of the semiconductor refrigeration device is dynamically adjusted based on the temperature changes detected by the temperature sensor in the refrigerator compartment, so that the temperature changes in the refrigerator compartment do not exceed a preset temperature fluctuation range. When the defrost cycle ends, the semiconductor refrigeration device is controlled to stop refrigeration. If the refrigerator is not in a defrost cycle, the temperature change rate in the refrigerator compartment is obtained based on the temperature changes detected by the temperature sensor. It is determined whether the temperature change rate in the refrigerator compartment exceeds a preset temperature change rate threshold. If the temperature change rate in the refrigerator compartment exceeds the preset temperature change rate threshold, the semiconductor refrigeration device is controlled to provide auxiliary refrigeration for the refrigerator compartment. When the temperature in the refrigerator compartment reaches the refrigerator compartment shutdown point temperature, the semiconductor refrigeration device is controlled to stop refrigeration, thereby solving the problem of excessive temperature fluctuations in the refrigerator compartment during defrost and sudden heat load scenarios.
[0119] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.
Claims
1. A method for controlling temperature fluctuations in a refrigerator's cold compartment, characterized in that, The method includes: After the refrigerator's compressor cooling system starts, determine whether the refrigerator is in a defrosting cycle; If the refrigerator is in a defrost cycle, the semiconductor refrigeration unit is controlled to cool the refrigerator compartment at the same time as the defrost command is sent. The cooling level of the semiconductor refrigeration device is dynamically adjusted based on the temperature changes detected by the temperature sensor in the refrigerator compartment, so that the temperature changes in the refrigerator compartment do not exceed the preset temperature fluctuation range. When the defrosting cycle ends, the semiconductor refrigeration device is controlled to stop refrigeration; If the refrigerator is not in the defrost cycle, the rate of temperature change in the refrigerator compartment is obtained based on the temperature change detected by the temperature sensor. Determine whether the rate of temperature change in the refrigeration compartment exceeds a preset temperature change rate threshold; If the temperature change rate inside the refrigerator exceeds a preset temperature change rate threshold, the semiconductor refrigeration device is controlled to provide auxiliary refrigeration to the refrigerator. When the temperature inside the refrigerator reaches the refrigerator's shutdown temperature, the semiconductor refrigeration device is controlled to stop refrigeration.
2. The method for controlling temperature fluctuations in a refrigerator compartment according to claim 1, characterized in that, The steps for dynamically adjusting the cooling level of the semiconductor refrigeration device based on temperature changes detected by a temperature sensor in the refrigerator compartment include: When the temperature change rate in the refrigerator compartment exceeds a preset temperature change rate threshold, the first cooling setting of the semiconductor refrigeration device is activated. When the temperature change in the refrigerator compartment is within a preset temperature fluctuation range threshold, the second cooling setting of the semiconductor refrigeration device is activated. The input power of the first cooling setting is higher than that of the second cooling setting.
3. The method for controlling temperature fluctuations in a refrigerator compartment according to claim 1, characterized in that, The steps to determine if a refrigerator is in its defrost cycle include: When the refrigerator enters the preset defrost time window and the temperature rise in the refrigerator compartment exceeds the preset defrost temperature threshold, the refrigerator is determined to be in a defrost cycle. When the refrigerator enters the preset defrost time window, but the temperature rise in the refrigerator compartment does not exceed the preset defrost temperature threshold, the refrigerator is determined not to be in a defrost cycle.
4. The method for controlling temperature fluctuations in a refrigerator compartment according to claim 1, characterized in that, The steps for determining whether the temperature change rate inside the refrigerator exceeds a preset temperature change rate threshold include: If the temperature rise in the refrigerator compartment exceeds a preset temperature rise value within a preset time interval, the semiconductor refrigeration device is controlled to provide auxiliary refrigeration to the refrigerator compartment. If the temperature rise in the refrigerator compartment is detected within a preset time interval but does not exceed the preset temperature rise value, the current cooling setting will be maintained to keep the temperature in the refrigerator compartment stable.
5. The method for controlling temperature fluctuations in a refrigerator compartment according to claim 1, characterized in that, The method further includes: The temperature inside the freezer compartment is collected using a second temperature sensor; When the temperature inside the freezer reaches the freezer's shutdown temperature, the compressor refrigeration system is shut down.
6. A refrigerator that reduces temperature fluctuations in the refrigerator compartment, characterized in that, The control method for reducing temperature fluctuations in a refrigerator compartment according to any one of claims 1-5, wherein the refrigerator comprises: a refrigerator compartment, a compressor refrigeration system, a semiconductor refrigeration device, a temperature sensor, and a controller; The semiconductor refrigeration device and the temperature sensor are disposed in the refrigerator compartment. The controller is communicatively connected to the compressor refrigeration system, the semiconductor refrigeration device, and the temperature sensor, respectively. The controller is configured to: After the refrigerator's compressor cooling system starts, determine whether the refrigerator is in a defrosting cycle; If the refrigerator is in a defrost cycle, the semiconductor refrigeration unit is controlled to cool the refrigerator compartment at the same time as the defrost command is sent. The cooling level of the semiconductor refrigeration device is dynamically adjusted based on the temperature changes detected by the temperature sensor in the refrigerator compartment, so that the temperature changes in the refrigerator compartment do not exceed the preset temperature fluctuation range. When the defrosting cycle ends, the semiconductor refrigeration device is controlled to stop refrigeration; If the refrigerator is not in the defrost cycle, the rate of temperature change in the refrigerator compartment is obtained based on the temperature change detected by the temperature sensor. Determine whether the rate of temperature change in the refrigeration compartment exceeds a preset temperature change rate threshold; If the temperature change rate inside the refrigerator exceeds a preset temperature change rate threshold, the semiconductor refrigeration device is controlled to provide auxiliary refrigeration to the refrigerator. When the temperature inside the refrigerator reaches the refrigerator's shutdown temperature, the semiconductor refrigeration device is controlled to stop refrigeration.
7. The refrigerator for reducing temperature fluctuations in the refrigerator compartment according to claim 6, characterized in that, The semiconductor refrigeration device includes multiple refrigeration levels. The semiconductor refrigeration device is connected to the temperature sensor to receive real-time temperature change data in the refrigerator compartment and dynamically adjust the working intensity of the semiconductor refrigeration device based on the temperature change data.
8. The refrigerator for reducing temperature fluctuations in the refrigerator compartment according to claim 6, characterized in that, The temperature sensor is a digital temperature probe, which is installed on the inner wall of the refrigerator compartment to accurately monitor temperature changes and temperature values.
9. The refrigerator for reducing temperature fluctuations in the refrigerator compartment according to claim 6, characterized in that, The controller includes a microprocessor unit, which stores preset temperature change rate threshold and preset temperature fluctuation range parameters, and generates control signals based on temperature data acquired by temperature sensors and outputs them to the semiconductor refrigeration device.
10. The refrigerator for reducing temperature fluctuations in the refrigerator compartment according to claim 6, characterized in that, The compressor refrigeration system includes a compressor, an evaporator, and a refrigerator compartment damper; The compressor and the evaporator are connected by refrigeration pipes to form a refrigerant circulation loop, which is used to provide cooling capacity for the refrigerator compartment and the freezer compartment; The refrigeration compartment damper is located on the side of the refrigeration pipeline near the refrigeration compartment and is used to control the amount of cold air supplied to the refrigeration compartment.