Direct-cooling refrigerator control method, direct-cooling refrigerator, and storage medium

Abstract

The present disclosure discloses a direct-cooling refrigerator control method, a direct-cooling refrigerator and a storage medium, which comprises the following steps: obtaining a target temperature of a refrigeration compartment of the direct-cooling refrigerator; generating a control signal of the direct-cooling refrigerator according to a preset temperature threshold and the target temperature, wherein the preset temperature threshold refers to a standard temperature interval of the refrigeration compartment of the direct-cooling refrigerator; inputting the control signal to a variable frequency drive board of the direct-cooling refrigerator to control a compressor of the direct-cooling refrigerator until the target temperature meets the preset temperature threshold. The present disclosure can effectively improve the refrigeration effect of the refrigeration compartment of the direct-cooling refrigerator and reduce the energy consumption of the refrigerator.

Description

Technical Field

[0001] This disclosure relates to the field of refrigerator control technology, specifically to a direct-cooling refrigerator control method, a direct-cooling refrigerator, and a computer-readable storage medium. Background Technology

[0002] A direct-cooling refrigerator is a traditional refrigerator design, also known as a single-compartment refrigerator or a compressor-type refrigerator. Its cooling method is relatively simple, primarily using a single compressor to achieve the refrigeration cycle. The refrigerant is circulated within the freezer compartment, while the refrigerator compartment maintains a lower temperature through natural convection.

[0003] However, this cooling method for the refrigerator and freezer compartments results in the refrigerator compartment being too cold when the freezer reaches the set temperature, which is not conducive to food storage in the refrigerator compartment. In addition, the compressor runs at a high speed, resulting in higher energy consumption of the refrigerator. Summary of the Invention

[0004] This disclosure provides a direct-cooling refrigerator control method, a direct-cooling refrigerator, and a storage medium, aiming to effectively improve the cooling effect of the refrigerator compartment and reduce refrigerator energy consumption.

[0005] In a first aspect, embodiments of this disclosure provide a method for controlling a direct-cooling refrigerator, including:

[0006] Obtain the target temperature of the refrigerator compartment in the direct-cooling refrigerator;

[0007] Based on the preset temperature threshold and the target temperature, a control signal for the direct-cooling refrigerator is generated. The preset temperature threshold refers to the standard temperature range of the refrigerator compartment in the direct-cooling refrigerator.

[0008] The control signal is input to the inverter drive board of the direct-cooling refrigerator to control the compressor of the direct-cooling refrigerator until the target temperature meets the preset temperature threshold.

[0009] In a second aspect, the present disclosure also provides a direct-cooling refrigerator, characterized in that it includes: a temperature sensor with communication connection, a differential mechanical temperature controller, a frequency converter drive board, a processor, and a memory;

[0010] The temperature sensor is used to obtain the target temperature of the refrigerator compartment in the direct-cooling refrigerator;

[0011] The processor is used to send the target temperature to the differential mechanical temperature controller;

[0012] The differential mechanical temperature controller is used to control the switching of the AC voltage signal flowing into the direct-cooling refrigerator to form a control signal according to the preset temperature threshold and the target temperature.

[0013] The processor is used to receive the control signal sent by the differential mechanical temperature controller and drive the frequency converter drive board.

[0014] The variable frequency drive board is used to control the compressor of the direct-cooling refrigerator according to the control signal until the target temperature meets the preset temperature threshold.

[0015] Thirdly, embodiments of this disclosure also provide a computer-readable storage medium storing a plurality of instructions adapted for loading by a processor to execute the steps of any of the direct-cooling refrigerator control methods provided in embodiments of this disclosure.

[0016] Compared to the inverter control method of compressors in existing direct-cooling refrigerators, this disclosure allows for the acquisition of the temperature in the refrigerator compartment. A control signal for the direct-cooling refrigerator can then be generated based on this temperature and a preset temperature threshold. This control signal is input to the inverter drive board of the direct-cooling refrigerator to control the operation of the compressor. Therefore, this disclosure effectively controls the compressor of the direct-cooling refrigerator based on the temperature of the refrigerator compartment through mechanical control. Since the temperature of the refrigerator compartment is much higher than that of the freezer compartment, the compressor can operate at a lower power and lower speed, significantly reducing the energy consumption and improving the energy efficiency of the direct-cooling refrigerator. Furthermore, this disclosure directly controls the temperature of the refrigerator compartment, avoiding the indirect control of the refrigerator compartment through the control of the freezer compartment in existing technologies, which can lead to excessively low refrigerator compartment temperatures and cause stored food to dry out and spoil. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the first process of controlling a direct-cooling refrigerator provided in the embodiments of this disclosure;

[0019] Figure 2-1 This is a schematic diagram of the first structure of the direct-cooling refrigerator provided in the embodiments of this disclosure;

[0020] Figure 2-2 This is a schematic diagram of the second structure of the direct-cooling refrigerator provided in the embodiments of this disclosure;

[0021] Figure 3 This is a schematic diagram of the first process of controlling a direct-cooling refrigerator provided in the embodiments of this disclosure;

[0022] Figure 4 This is a schematic diagram of the first process of controlling a direct-cooling refrigerator provided in the embodiments of this disclosure;

[0023] Figure 5 This is a schematic diagram of the first process of controlling a direct-cooling refrigerator provided in the embodiments of this disclosure;

[0024] Figure 6 This is a schematic diagram of the third structure of a direct-cooling refrigerator provided in this embodiment of the disclosure. Detailed Implementation

[0025] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure. Furthermore, in the description of the embodiments of this disclosure, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of this disclosure, "multiple" means two or more, unless otherwise explicitly specified.

[0026] This disclosure provides a method, apparatus, direct-cooling refrigerator control method, and computer-readable storage medium.

[0027] Specifically, this embodiment will be described from the perspective of the direct-cooling refrigerator control device, which can be integrated into the direct-cooling refrigerator. That is, the direct-cooling refrigerator control method of this embodiment can be executed by the direct-cooling refrigerator, or optionally, by a device with drying function such as a washing machine.

[0028] The following detailed description, in conjunction with the accompanying drawings, illustrates the process. This embodiment uses a direct-cooling refrigerator as an example. It should be noted that the order of description in the following embodiments is not intended to limit the preferred order of the embodiments. Although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown in the accompanying drawings.

[0029] According to the background description of this disclosure, current direct-cooling refrigerators cannot simultaneously ensure that the refrigerator compartment and the freezer compartment are at a suitable temperature, which may cause food in the refrigerator compartment and the freezer compartment to spoil.

[0030] Therefore, in order to solve the above problems, this disclosure provides a direct-cooling refrigerator control method, a direct-cooling refrigerator, an electronic device, and a computer-storable medium.

[0031] The direct-cooling refrigerator disclosed herein includes a temperature sensor, a mechanical differential temperature controller, a frequency converter drive board, a control box, and connecting lines, terminals, a magnetic switch, and a low-ambient-temperature refrigeration heat compensation heating wire. The mechanical differential temperature controller can be understood as having a fixed temperature difference between the opening and closing of its temperature control contacts.

[0032] For example, depending on the required storage temperature of food in different compartments, the differential mechanical temperature controller that controls the on / off state of the frequency converter drive board signal can be divided into three adjustment levels: strong cooling, medium cooling, and low cooling. In the strong cooling setting, the on-state temperature of the temperature control contact can be 0.5℃, and the off-state temperature can be -0.5℃; in the medium cooling setting, the on-state temperature can be 4.5℃, and the off-state temperature can be -0.5℃; in the low cooling setting, the on-state temperature can be 8℃, and the off-state temperature can be 3℃. The temperature difference between the on-state and off-state temperatures of the temperature control contact is 5 degrees Celsius.

[0033] In addition, the aforementioned low ambient temperature refrigeration heat compensation heating wire can be installed close to the inner liner of the refrigeration compartment, so that the refrigeration compartment is heated when the temperature is too low, thus preventing food from spoiling or drying out due to the low temperature of the refrigeration compartment.

[0034] Based on this, please refer to Figure 1 The specific process of this direct-cooling refrigerator control method can be summarized in steps S10 to S30, wherein:

[0035] Step S10: Obtain the target temperature of the refrigerator compartment in the direct-cooling refrigerator;

[0036] It should be noted that, in this embodiment, as Figure 2-1 and Figure 2-2 As shown, a temperature sensor can be installed on the insulation side (i.e., the foam layer side) behind the inner liner of the refrigerator compartment in a direct-cooling refrigerator, and this temperature sensor can be used to indirectly measure the temperature of the refrigerator compartment. This embodiment does not limit the type of temperature sensor; for example, the temperature sensor can be a probe type.

[0037] Based on this, direct-cooling refrigerators can obtain the target temperature of the insulation side of the refrigerator compartment.

[0038] Step S20: Generate a control signal for the direct-cooling refrigerator based on a preset temperature threshold and the target temperature. The preset temperature threshold refers to the standard temperature range of the refrigerator compartment in the direct-cooling refrigerator.

[0039] In this embodiment, after obtaining the target temperature of the insulation side of the refrigerator compartment, the direct-cooling refrigerator can generate a control signal for the direct-cooling refrigerator based on a preset temperature threshold and the target temperature.

[0040] It should be noted that, in this embodiment, the preset temperature threshold can specifically be the standard temperature range of the refrigerator compartment in a direct-cooling refrigerator. The endpoints of this standard temperature range can be the on-time and off-time of the temperature control contacts of the differential mechanical temperature controller. The preset temperature threshold is also different when the differential mechanical temperature controller is in different settings.

[0041] It is worth noting that in this embodiment, the control signal of the direct-cooling refrigerator is generated by collecting the temperature of the insulation side of the refrigerator compartment. Since the temperature of the refrigerator compartment is much higher than that of the freezer compartment, the heat load of the refrigerator compartment is smaller than that of the freezer compartment. Therefore, the compressor speed can operate at low power and low speed, achieving optimal matching with the heat load of the cabinet under different ambient temperatures, thereby reducing the overall energy consumption of the direct-cooling refrigerator and improving its energy efficiency.

[0042] Step S30: Input the control signal to the inverter drive board of the direct-cooling refrigerator to control the compressor of the direct-cooling refrigerator until the target temperature meets the preset temperature threshold.

[0043] After generating a control signal, the direct-cooling refrigerator can input the control signal into the inverter drive board of the direct-cooling refrigerator. The drive signal output by the inverter drive board controls the operation of the compressor of the direct-cooling refrigerator, including controlling the compression power and operating speed of the compressor, until the target temperature meets the preset temperature threshold.

[0044] The direct-cooling refrigerator inverter drive board is equipped with an MCU chip that has functions such as calculation, analysis, and judgment, which is used to send drive signals to control the start and stop of the direct-cooling refrigerator compressor.

[0045] Specifically, for example, by acquiring the target temperature at the inner wall of the back of the refrigerator's inner liner, the on / off state of the temperature control contacts of the differential mechanical temperature controller can be controlled. The 20V / 50Hz AC voltage signal from the on / off state of the temperature control contacts, along with the on / off rate (i.e., the compressor's starting frequency), can then be used as the input control signal to the inverter drive board. This signal is then converted into a 3.3V square wave pulse signal by the inverter drive board's control signal conversion circuit, controlling the inverter drive board to issue a drive signal, thus controlling the compressor's start-up and shutdown. Therefore, this embodiment can achieve inverter control of the direct-cooling refrigerator compressor through mechanical control.

[0046] Therefore, in this embodiment, the direct-cooling refrigerator can obtain the target temperature of the insulation side of the refrigerator compartment. After obtaining the target temperature of the insulation side of the refrigerator compartment, the direct-cooling refrigerator can generate a control signal based on a preset temperature threshold and the target temperature. After generating the control signal, the direct-cooling refrigerator can input the control signal into the inverter drive board of the direct-cooling refrigerator. The drive signal output by the inverter drive board controls the operation of the compressor of the direct-cooling refrigerator, including controlling the power of the compressor and thus controlling the speed of the compressor.

[0047] Compared to the inverter control method of compressors in existing direct-cooling refrigerators, this disclosure allows for the acquisition of the temperature in the refrigerator compartment. A control signal for the direct-cooling refrigerator can then be generated based on this temperature and a preset temperature threshold. This control signal is input to the inverter drive board of the direct-cooling refrigerator to control the operation of the compressor. Therefore, this disclosure effectively controls the compressor of the direct-cooling refrigerator based on the temperature of the refrigerator compartment through mechanical control. Since the temperature of the refrigerator compartment is much higher than that of the freezer compartment, the compressor can operate at a lower power and lower speed, significantly reducing the energy consumption and improving the energy efficiency of the direct-cooling refrigerator. Furthermore, this disclosure directly controls the temperature of the refrigerator compartment, avoiding the indirect control of the refrigerator compartment through the control of the freezer compartment in existing technologies, which can lead to excessively low refrigerator compartment temperatures and cause stored food to dry out and spoil.

[0048] In one embodiment, step S20 above, "generating a control signal for the direct-cooling refrigerator based on a preset temperature threshold and the target temperature," may include:

[0049] Step S201: If the target temperature reaches the preset temperature threshold, then the high level is determined to be the control signal of the direct cooling refrigerator;

[0050] Step S202: If the target temperature does not reach the preset temperature threshold, then the low level is determined to be the control signal of the direct cooling refrigerator;

[0051] It should be noted that, according to the above embodiments, the preset temperature threshold can specifically be the on-time or off-time of the temperature control contact of the differential mechanical temperature controller.

[0052] Based on this, when the direct-cooling refrigerator detects that the target temperature has reached the preset temperature threshold, a high-level signal can be used as the control signal for the direct-cooling refrigerator, which is used to control the start-up and operation of the direct-cooling refrigerator compressor; when the target temperature is not detected to have reached the preset temperature threshold, a low-level signal can be used as the control signal for the direct-cooling refrigerator, which is used to control the stop-down of the direct-cooling refrigerator compressor.

[0053] It is understood that the control signals mentioned above may include multiple high-level signals and low-level signals arranged at intervals. The compressor is controlled to start and stop periodically through these multiple high-level signals and low-level signals arranged at intervals. An adjacent start-up and stop constitutes one start-stop cycle of the compressor.

[0054] It is worth noting that, in addition to using high or low levels as input signals for the inverter drive board to control the compressor, other forms of signals can also be used as input signals for compressor control.

[0055] Based on this, step S30 above, "inputting the control signal to the inverter drive board of the direct-cooling refrigerator to control the compressor of the direct-cooling refrigerator," may include:

[0056] Step S301: Input the control signal to the inverter drive board of the direct-cooling refrigerator. If the control signal is a high-level signal, control the compressor to run; or, if the control signal is a low-level signal, control the compressor to shut down.

[0057] In this embodiment, the direct-cooling refrigerator can input the aforementioned high-level signal or low-level signal to its inverter drive board. If the input control signal is a high-level signal, it is input to the inverter drive board, and then converted into a square wave pulse signal by the control signal conversion circuit of the inverter drive board. This controls the inverter drive board to issue a drive signal for starting the compressor.

[0058] Similarly, if the input control signal is a low-level signal, the low-level signal is input to the frequency converter drive board, and then the control signal conversion circuit of the frequency converter drive board converts the input signal into a square wave pulse signal, which controls the frequency converter drive board to send a drive signal for shutdown, thereby controlling the compressor to shut down.

[0059] Therefore, in this embodiment, the compressor of the direct-cooling refrigerator can be controlled to start and stop based on the temperature of the insulation side of the refrigerator compartment and the preset temperature threshold of the mechanical temperature controller. Through mechanical control, both the frequency conversion control of the direct-cooling air conditioner can be realized, and the cost of frequency conversion control of the direct-cooling air conditioner can be effectively reduced.

[0060] In one embodiment, before "generating the control signal for the direct-cooling refrigerator according to the preset temperature threshold and the target temperature" in step S20 above, the following may also be included:

[0061] Step S40: Obtain the cooling mode of the direct-cooling refrigerator;

[0062] Step S50: If the cooling mode is a strong cooling mode, then the endpoint value of the preset first temperature range is set as a preset temperature threshold.

[0063] Step S60: If the cooling mode is intercooling mode, then the endpoint value of the preset second temperature range is set to the preset temperature threshold.

[0064] Step S70: If the cooling mode is low cooling mode, then the endpoint value of the preset third temperature range is set to the preset temperature threshold.

[0065] In this embodiment, before controlling the compressor's start and stop according to the target temperature on the insulation side of the refrigerator compartment and the preset temperature threshold, the direct-cooling refrigerator needs to pre-determine the aforementioned preset temperature threshold. According to the above description, the differential mechanical temperature controller that controls the on / off state of the inverter drive board signal can be categorized into strong cooling, medium cooling, and low cooling, depending on the required storage temperature of the food in each compartment.

[0066] Specifically, for example, a direct-cooling refrigerator can calculate the difference between the temperature of the load (food and items, etc.) inside the refrigerator compartment and the target temperature required for the refrigerator compartment, and calculate the internal air volume of the refrigerator compartment. Based on this, the direct-cooling refrigerator can calculate the heat load of the refrigerator compartment using the above parameters. Furthermore, based on the heat load of the refrigerator compartment and the target temperature required for the refrigerator compartment, the refrigerator's cooling mode can be determined as strong cooling, medium cooling, or weak cooling.

[0067] Furthermore, if the direct-cooling refrigerator determines that its cooling mode is strong cooling mode, it can set the endpoint value of the preset first temperature range as the preset temperature threshold. Similarly, if it determines that the direct-cooling refrigerator's cooling mode is medium cooling mode, it can set the endpoint value of the preset second temperature range as the preset temperature threshold. If it determines that the direct-cooling refrigerator's cooling mode is weak cooling mode, it can set the endpoint value of the preset third temperature range as the preset temperature threshold.

[0068] It is understood that in this embodiment, the preset first temperature range, second temperature range and third temperature range all include two endpoint values, and the connection and disconnection of the temperature control contacts of the differential mechanical temperature controller are controlled according to the two endpoint values.

[0069] Specifically, for example, in strong cooling mode, the endpoint values ​​of the first temperature range can include 0.5℃ and -0.5℃, that is, the on-time temperature of the temperature control contact can be 0.5℃ and the off-time temperature can be -0.5℃; in medium cooling mode, the endpoint values ​​of the second temperature range can include 4.5℃ and -0.5℃, that is, the on-time temperature of the temperature control contact can be 4.5℃ and the off-time temperature can be -0.5℃; in low cooling mode, the endpoint values ​​of the third temperature range can include 8℃ and 3℃, that is, the on-time temperature of the temperature control contact can be 8℃ and the off-time temperature can be 3℃.

[0070] Therefore, in this embodiment, on the one hand, fixed on-time and off-time temperatures of the temperature control contacts are preset, allowing the direct-cooling air conditioner to flexibly control the compressor's start-up and shutdown based on temperature changes in the refrigerator compartment; on the other hand, this embodiment can pre-determine the cooling mode of the direct-cooling refrigerator based on the temperature requirements of the refrigerator compartment load, determine the corresponding temperature threshold based on the cooling mode, and adjust the compressor power and speed accordingly, effectively improving the refrigeration effect of the refrigerator compartment and avoiding the high energy consumption of the direct-cooling refrigerator caused by the compressor running at high speed for a long time.

[0071] In one embodiment, before step S10, "obtaining the target temperature of the insulation side of the refrigerator compartment in the direct-cooling refrigerator", the following may be included:

[0072] Step S80: In response to the start command of the direct-cooling refrigerator, control the compressor to operate according to the preset compression power;

[0073] Additionally, after step S30 above, which involves "inputting the control signal to the inverter drive board of the direct-cooling refrigerator to control the compressor of the direct-cooling refrigerator," the following may also be included:

[0074] Step S90: Calculate the running time of the compressor. If the running time exceeds a first preset time, increase the preset compression power. If the running time is less than a second preset time, maintain the preset compression power of the compressor.

[0075] Step S100: Calculate the starting frequency of the compressor; if the starting frequency is less than a first preset frequency, reduce the compression power of the compressor; if the starting frequency is greater than a second preset frequency, increase the compression power of the compressor.

[0076] In this embodiment, the direct-cooling refrigerator can respond to a start-up command and, based on the command, control the refrigerator to start and the compressor to operate at a preset compression power. During operation, the target temperature of the refrigerator is acquired, and the compressor's start-up and shutdown processes are controlled based on this target temperature and the preset temperature threshold. Furthermore, if the compressor's operating time exceeds a preset duration, the preset compression power is increased. If the target temperature has not reached the disconnection temperature of the temperature control contact when the compressor's operating time reaches the preset duration, the compressor remains running. If the operating time is less than the preset duration, the preset compression power is maintained.

[0077] It should be noted that, in this embodiment, the triggering method of the aforementioned start-up command of the direct-cooling refrigerator can be determined according to the start-up and stop cycle of the direct-cooling refrigerator. For example, if the start-up and stop cycle of the direct-cooling refrigerator is the first start-up and stop cycle of the direct-cooling refrigerator, then the direct-cooling refrigerator can automatically trigger the start-up command, and then control the compressor to operate according to the preset compression power according to the start-up command.

[0078] It is understandable that, since the power of the compressor will increase rapidly as the compressor speed increases, this disclosure can take the compressor speed as an example to specifically illustrate the control process of the direct-cooling refrigerator compressor.

[0079] Specifically, for example, such as Figure 3 As shown, to supply oil to the compressor, the compressor starts in start-up mode from a standstill, running at 1920 RPM for 15 seconds. After the start-up mode ends, the speed increases to 2220 RPM. Furthermore, if the compressor runs for 30 minutes without stopping, the speed increases to 4320 RPM until the target temperature reaches the preset temperature threshold where the temperature control contact opens, cutting off the input signal to the inverter drive board. The inverter drive board then sends a stop drive signal, disconnecting the compressor circuit and stopping the compressor. Otherwise, if the compressor runs for less than 30 minutes, it continues to run at 2220 RPM until the target temperature reaches the preset temperature threshold where the temperature control contact opens, at which point the compressor immediately stops.

[0080] For example, such as Figure 4As shown, if the current start-stop cycle of the direct-cooling refrigerator is any other start-stop cycle besides the first one, then the start-up command can be triggered based on the target temperature. That is, when the target temperature rises to the temperature at which the temperature control contact closes, the temperature control contact closes, generating a corresponding control signal that is input to the inverter drive board. The inverter drive board then receives the start-up command and, based on this command, controls the compressor to start running at 1920 RPM for 15 seconds in start-up mode. After starting, the compressor speed increases to 2820 RPM. Furthermore, if the compressor runs for 90 minutes without stopping, the speed increases to 4020 RPM until the target temperature reaches the temperature at which the temperature control contact closes within the preset temperature threshold. This cuts off the input signal to the inverter drive board, which then sends a stop drive signal to disconnect the compressor circuit, stopping the compressor.

[0081] It should be noted that, in this embodiment, as described above, the compressor has multiple start-stop cycles, including a first start-stop cycle, a second start-stop cycle, and subsequent start-stop cycles. Each start-stop cycle not only affects the triggering method of the aforementioned start-up command but also differs in the compressor speed control method. In other start-stop cycles, the compressor can obtain the operating parameters of the previous start-stop cycle to control its speed. These operating parameters may include the operating rate of the aforementioned start-stop cycle.

[0082] Based on this, direct-cooling refrigerators can statistically analyze the compressor's start-up frequency during the previous start-stop cycle (i.e., the compressor's operating rate during the previous start-stop cycle). If this start-up frequency is less than a first preset frequency, it means the refrigerator's compartment temperature is relatively stable, the heat load within the compartment is relatively stable and low. In this case, the compressor's compression power can be reduced to decrease the refrigerator's energy consumption. If the start-up frequency is greater than a second preset frequency, it means the refrigerator's compartment temperature fluctuates significantly, the heat load within the compartment is high, and the compressor's compression power needs to be increased to maintain the refrigerator compartment temperature and prevent food spoilage.

[0083] Specifically, for example, such as Figure 5As shown, in the third start-stop cycle and subsequent cycles: when the target temperature rises back to the contact temperature of the temperature control contact, the temperature control contact is closed, generating a corresponding control signal input to the frequency converter drive board, obtaining the start command generated by the frequency converter drive board, and controlling the compressor to start running at a speed of 1920 RPM for 15 seconds according to the start mode. After the compressor starts running, the MCU set in the frequency converter drive board analyzes, calculates and judges the running speed according to the start rate of the previous start-stop cycle. When the operating rate is between 70% and 75%, the compressor speed remains unchanged at the starting speed (i.e., 1920 RPM). If the compressor runs continuously for 60 minutes without stopping, the speed is adjusted to 2220 RPM (an increase of 300 RPM). If the compressor continues to run for 30 minutes without stopping, the speed is adjusted to 2520 RPM (an increase of 300 RPM) until the temperature control contact is disconnected. When the operating rate is less than 70% (i.e., the first preset frequency in this embodiment), the compressor speed is reduced by one level (i.e., reduced by 300 RPM). When the operating rate is greater than 75% (i.e., the second preset frequency in this embodiment), the compressor speed is increased by one level (i.e., increased by 300 RPM). The minimum and maximum speeds during the compressor speed adjustment process can be fixed values, such as a minimum speed of 1200 RPM and a maximum speed of 4500 RPM.

[0084] Therefore, in this embodiment, the start-up and shutdown of the compressor are controlled according to parameters such as the temperature of the refrigerator compartment, the running time of the compressor, and the compressor start-up frequency. This achieves variable frequency control of the direct-cooling refrigerator, enabling the variable frequency compressor to operate at low speed and low power. It achieves optimal matching with the heat load of the refrigerator body under different ambient temperatures, thereby reducing the overall energy consumption and improving the energy efficiency of the product. This also breaks through the technical bottleneck in the refrigeration industry where it is difficult to use variable frequency technology to achieve high energy efficiency in direct-cooling refrigerators, thus enhancing the product's market competitiveness.

[0085] In one embodiment, after step S30, "inputting the control signal to the inverter drive board of the direct-cooling refrigerator to control the compressor of the direct-cooling refrigerator," the following may be included:

[0086] Step S110: Obtain the temperature at the freezer door seal of the freezer compartment of the direct-cooling refrigerator;

[0087] Step S120: Obtain the heat load of the freezer compartment based on the temperature at the freezer door seal and the preset target temperature threshold of the freezer compartment;

[0088] Step S130: Adjust the compression power of the compressor according to the heat load.

[0089] It should be noted that in this embodiment, the normal temperature of the freezer compartment is generally -18°C. However, during the manufacturing process of the direct-cooling refrigerator, the area ratio of the evaporator at the back of the freezer compartment to the evaporator at the back of the refrigerator compartment is predetermined. Based on this area ratio and the temperature of the refrigerator compartment, the freezer compartment temperature can be monitored in real time to see if it reaches -18°C.

[0090] It is understandable that the temperature at the freezer door seal is generally the highest temperature in the freezer compartment. Therefore, a direct-cooling refrigerator can obtain the temperature at the freezer door seal. If the temperature at the freezer door seal does not reach the preset target temperature threshold of the freezer compartment (such as -18°C as mentioned above), the heat load of the freezer compartment is obtained based on the temperature at the freezer door seal and the preset target temperature threshold of the freezer compartment. The calculation method of the heat load refers to the existing heat load calculation method, which will not be elaborated here.

[0091] Furthermore, the compressor's compression power can be adjusted based on the calculated heat load. For example, if the temperature at the freezer door seal does not reach -18°C, the compressor's compression power can be increased to improve the compressor's cooling capacity.

[0092] In another embodiment, if the temperature of the cold storage compartment is detected to be lower than the preset critical storage temperature while increasing the compression power of the compressor, the aforementioned low ambient temperature cold storage heat compensation heating wire is controlled to heat the cold storage compartment to prevent the cold storage compartment temperature from being too low, which could lead to food spoilage.

[0093] Therefore, in this embodiment, the temperature of the freezer compartment can be indirectly controlled based on the temperature of the refrigerator compartment, ensuring that the refrigerator compartment reaches a suitable freezing temperature. Furthermore, when the refrigerator compartment temperature is too low, it can be heated, improving the freezer compartment's insulation performance. In addition, in this embodiment, the compressor operates at low speed for extended periods, significantly reducing overall energy consumption and improving the energy efficiency of the direct-cooling refrigerator.

[0094] In one embodiment, this disclosure also discloses a direct-cooling refrigerator, comprising: a temperature sensor, a differential mechanical temperature controller, a frequency converter drive board, a processor, and a memory connected in communication;

[0095] The temperature sensor is used to obtain the target temperature of the refrigerator compartment in the direct-cooling refrigerator;

[0096] The processor is used to send the target temperature to the differential mechanical temperature controller;

[0097] The differential mechanical temperature controller is used to control the switching of the AC voltage signal flowing into the direct-cooling refrigerator to form a control signal according to the preset temperature threshold and the target temperature.

[0098] The processor is used to receive the control signal sent by the differential mechanical temperature controller and drive the frequency converter drive board.

[0099] The variable frequency drive board is used to control the compressor of the direct-cooling refrigerator according to the control signal until the target temperature meets the preset temperature threshold.

[0100] In this embodiment, in order to implement the above-mentioned direct-cooling refrigerator control method, the direct-cooling refrigerator in this embodiment includes at least a temperature sensor with communication connection, a differential mechanical temperature controller, a frequency converter drive board, a processor, and a memory.

[0101] In this direct-cooling refrigerator, a temperature sensor in the refrigerator compartment can acquire the target temperature. The processor then sends this target temperature to a differential mechanical temperature controller. The differential mechanical temperature controller generates a control signal for the direct-cooling refrigerator based on a preset temperature threshold and the target temperature. The processor then inputs this control signal to the inverter drive board of the direct-cooling refrigerator. The inverter drive board outputs a drive signal that controls the operation of the refrigerator's compressor, including controlling the compressor's compression power and operating speed, until the target temperature meets the preset temperature threshold.

[0102] In one embodiment, the direct-cooling refrigerator further includes:

[0103] Compensating heating wire;

[0104] The compensating heating wire is located on the back of the refrigerator compartment of the direct-cooling refrigerator. If the target temperature of the refrigerator compartment is lower than the preset storage critical temperature, it is used to heat the refrigerator compartment until the target temperature of the refrigerator compartment is higher than the preset storage critical temperature.

[0105] In this embodiment, the direct-cooling refrigerator may further include a compensating heating wire, which may specifically be a low ambient temperature refrigeration heat compensation heating wire, wherein the compensating heating wire is disposed on the back of the refrigerator compartment of the direct-cooling refrigerator (or at other locations close to the refrigerator compartment).

[0106] As described in the above embodiments, if the temperature at the freezer door seal does not reach the preset target temperature threshold of the freezer compartment (e.g., -18°C), the compressor's compression power can be adjusted based on the temperature at the freezer door seal and the preset target temperature threshold. For example, if the temperature at the freezer door seal does not reach -18°C, the compressor's compression power can be increased to improve the compressor's cooling capacity. However, while increasing the compressor's compression power, if the refrigerator compartment temperature is detected to be lower than the preset storage critical temperature, the low ambient temperature refrigerator heat compensation heating wire can be controlled to heat the refrigerator compartment until the target temperature of the refrigerator compartment is higher than the preset storage critical temperature, thus preventing the refrigerator compartment temperature from being too low and causing the stored food to spoil.

[0107] In one embodiment, the direct-cooling refrigerator further includes:

[0108] A cavity sensor bracket is disposed on the evaporator base plate of the direct-cooling refrigerator and placed separately from the evaporator;

[0109] The temperature sensor, located inside the cavity sensor bracket, is used to collect the target temperature on the back insulation side of the cold storage compartment.

[0110] The direct-cooling refrigerator also includes:

[0111] First evaporator and second evaporator;

[0112] The compression molding machine is connected to the first evaporator and the second evaporator;

[0113] The first evaporator is located behind the refrigerator compartment of the direct-cooling refrigerator and is used to adjust the temperature of the refrigerator compartment according to the compression power of the compressor.

[0114] The second evaporator is located behind the freezer compartment of the direct-cooling refrigerator and is used to adjust the temperature of the freezer compartment of the direct-cooling refrigerator according to the compression power of the compressor.

[0115] The direct-cooling refrigerator also includes a first evaporator located behind the refrigerator compartment, a second evaporator located behind the freezer compartment, and a cavity sensor bracket. The cavity sensor bracket is disposed on the evaporator base plate of the direct-cooling refrigerator and is placed separately from the first evaporator. The temperature sensor is located inside the cavity sensor bracket.

[0116] The ratio of the evaporator area between the first evaporator and the second evaporator is a preset target value, so that the temperature of the freezer compartment reaches a preset target temperature threshold (e.g., -18°C) under this preset target value.

[0117] To ensure the operability and reliability of the production process, the temperature sensing bracket for placing the temperature sensor probe of the mechanical temperature controller is partially glued to the aluminum plate of the evaporator using double-sided tape.

[0118] During refrigeration operation, the evaporator's refrigeration temperature does not affect the temperature sensor (such as a temperature probe) placed inside the cavity sensor holder. The temperature controller's temperature probe is unaffected by the evaporator's evaporation temperature; it only senses the temperature of the cold air inside the cavity sensor holder's temperature sensing chamber. The storage temperature reached inside the cold storage room is approximately 1 degree Celsius higher than the temperature of the cold air inside the cavity sensor holder's chamber.

[0119] Therefore, this embodiment can control the compressor of the direct-cooling refrigerator through mechanical control based on the temperature of the refrigerator compartment. The compressor speed can operate at a lower power and lower speed using frequency conversion, significantly reducing the energy consumption of the direct-cooling refrigerator and improving its energy efficiency. Furthermore, this disclosure directly controls the temperature of the refrigerator compartment, avoiding the indirect control of the refrigerator compartment through the control of the freezer compartment in existing technologies, which can lead to excessively low refrigerator compartment temperatures and cause stored food to dry out and spoil.

[0120] like Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of a direct-cooling refrigerator provided in an embodiment of this disclosure. The direct-cooling refrigerator 1100 includes a processor 1101 with one or more processing cores, a memory 1102 with one or more computer-readable storage media, and a computer program stored on the memory 1102 and executable on the processor. The processor 1101 and the memory 1102 are electrically connected. Those skilled in the art will understand that the direct-cooling refrigerator structure shown in the figure does not constitute a limitation on the direct-cooling refrigerator, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0121] The processor 1101 is the control center of the direct-cooling refrigerator 1100. It connects various parts of the refrigerator 1100 via various interfaces and lines. By running or loading software programs and / or units stored in the memory 1102, and by calling data stored in the memory 1102, it executes various functions and processes data of the refrigerator 1100, thereby providing overall monitoring of the refrigerator 1100. The processor 1101 can be a CPU, GPU, network processor (NP), etc., and can implement or execute the methods, steps, and logic diagrams disclosed in the embodiments of this disclosure.

[0122] In this embodiment of the disclosure, the processor 1101 in the direct-cooling refrigerator 1100 loads the instructions corresponding to the processes of one or more application programs into the memory 1102 according to the following steps, and the processor 1101 runs the application programs stored in the memory 1102 to realize various functions, such as:

[0123] Obtain the target temperature on the insulation side of the refrigerator compartment in the direct-cooling refrigerator;

[0124] The control signal for the direct-cooling refrigerator is generated based on the preset temperature threshold and the target temperature.

[0125] The control signal is input to the inverter drive board of the direct-cooling refrigerator to control the compressor of the direct-cooling refrigerator.

[0126] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0127] Optional, such as Figure 6 As shown, the direct-cooling refrigerator 1100 also includes: a touch screen display 1103, an radio frequency circuit 1104, an audio circuit 1105, an input unit 1106, and a power supply 1107. The processor 1101 is electrically connected to the touch screen display 1103, the radio frequency circuit 1104, the audio circuit 1105, the input unit 1106, and the power supply 1107. Those skilled in the art will understand that... Figure 6 The direct-cooling refrigerator structure shown does not constitute a limitation on direct-cooling refrigerators and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0128] The touch display screen 1103 can be used to display a graphical user interface (GUI) and receive operation commands generated by the user interacting with the GUI. The touch display screen 1103 may include a display panel and a touch panel. The display panel can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of the direct-cooling refrigerator. These graphical user interfaces can be composed of graphics, text, icons, video, and any combination thereof. Optionally, the display panel can be configured using a liquid crystal display (LCD), organic light-emitting diode (OLED), or other similar technology. The touch panel can be used to collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near the touch panel), and generate corresponding operation commands, which then execute the corresponding program. Optionally, the touch panel may include a touch detection device and a touch controller. The touch detection device detects the user's touch location and the signal generated by the touch operation, transmitting the signal to the touch controller. The touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends it to the processor 1101. It can also receive and execute commands from the processor 1101. The touch panel can cover the display panel. When the touch panel detects a touch operation on or near it, it transmits the information to the processor 1101 to determine the type of touch event. Subsequently, the processor 1101 provides corresponding visual output on the display panel based on the type of touch event. In this embodiment, the touch panel and the display panel can be integrated into the touch display screen 1103 to achieve input and output functions. However, in some embodiments, the touch panel and the touch display screen 1103 can be implemented as two independent components to achieve input and output functions. That is, the touch display screen 1103 can also be used as part of the input unit 1106 to achieve input functions.

[0129] The radio frequency circuit 1104 can be used to transmit and receive radio frequency signals to establish wireless communication with network devices or other direct-cooling refrigerators, and to transmit and receive signals with network devices or other direct-cooling refrigerators.

[0130] Audio circuit 1105 can be used to provide an audio interface between the user and the direct-cooling refrigerator via a speaker and a microphone. Audio circuit 1105 can convert received audio data into electrical signals and transmit them to the speaker, where the speaker converts them into sound signals for output. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuit 1105, converted back into audio data, and then processed by processor 1101 before being transmitted via radio frequency circuit 1104 to, for example, another direct-cooling refrigerator, or output to memory 1102 for further processing. Audio circuit 1105 may also include an earphone jack to provide communication between external headphones and the direct-cooling refrigerator.

[0131] The input unit 1106 can be used to receive input numbers, characters, or user characteristic information (such as fingerprints, iris, facial information, etc.), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control.

[0132] Power supply 1107 is used to supply power to various components of the direct-cooling refrigerator 1100. Optionally, power supply 1107 can be logically connected to processor 1101 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. Power supply 1107 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0133] although Figure 6 As not shown in the diagram, the direct-cooling refrigerator 1100 may also include a camera, sensor, wireless fidelity module, Bluetooth module, etc., which will not be described in detail here.

[0134] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0135] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0136] Therefore, embodiments of this disclosure provide a computer-readable storage medium storing a plurality of computer programs that can be loaded by a processor to execute any of the direct-cooling refrigerator control methods provided in embodiments of this disclosure. The computer program can execute the steps of the following direct-cooling refrigerator control method:

[0137] Obtain the target temperature of the refrigerator compartment in the direct-cooling refrigerator;

[0138] Based on the preset temperature threshold and the target temperature, a control signal for the direct-cooling refrigerator is generated. The preset temperature threshold refers to the standard temperature range of the refrigerator compartment in the direct-cooling refrigerator.

[0139] The control signal is input to the inverter drive board of the direct-cooling refrigerator to control the compressor of the direct-cooling refrigerator until the target temperature meets the preset temperature threshold.

[0140] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0141] The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0142] Since the computer program stored in the computer-readable storage medium can execute any of the direct-cooling refrigerator control methods provided in the embodiments of this disclosure, the beneficial effects that any of the direct-cooling refrigerator control methods provided in the embodiments of this disclosure can achieve can be realized, as detailed in the preceding embodiments, and will not be repeated here.

[0143] In the above embodiments of the direct-cooling refrigerator and computer-readable storage medium, the descriptions of each embodiment have different focuses. For parts not described in detail in a particular embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes and beneficial effects of the direct-cooling refrigerator control device, computer-readable storage medium, computer program product, direct-cooling refrigerator, and its corresponding units described above can be referred to the description of the direct-cooling refrigerator control method in the above embodiments, and will not be repeated here.

[0144] The foregoing has provided a detailed description of a direct-cooling refrigerator control method, a direct-cooling refrigerator, and a computer-readable storage medium provided by the embodiments of this disclosure. Specific examples have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of the above embodiments are only for the purpose of helping to understand the method and its core ideas. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of this disclosure. Therefore, the content of this specification should not be construed as a limitation of this disclosure.

Claims

1. A method for controlling a direct-cooling refrigerator, characterized in that, The direct-cooling refrigerator control method is applied to a direct-cooling refrigerator, and the direct-cooling refrigerator control method includes: Obtain the target temperature of the refrigerator compartment in the direct-cooling refrigerator; Based on the target temperature and the standard temperature range of the refrigerator compartment in the direct-cooling refrigerator, a control signal for the direct-cooling refrigerator is generated; The control signal is input to the inverter drive board of the direct-cooling refrigerator to control the compressor of the direct-cooling refrigerator until the target temperature meets the standard temperature range; Before obtaining the target temperature of the refrigerator compartment in the direct-cooling refrigerator, the process includes: responding to the start-up command of the direct-cooling refrigerator and controlling the compressor to operate at a preset compression power; after inputting the control signal to the inverter drive board of the direct-cooling refrigerator to control the compressor, the process includes: calculating the compressor's running time; if the running time exceeds a preset time, increasing the preset compression power; if the running time is less than the preset time, maintaining the preset compression power of the compressor; and / or calculating the compressor's starting frequency; if the starting frequency is less than a first preset frequency, decreasing the preset compression power of the compressor; if the starting frequency is greater than a second preset frequency, increasing the preset compression power of the compressor.

2. The direct-cooling refrigerator control method according to claim 1, characterized in that, The step of generating a control signal for the direct-cooling refrigerator based on the target temperature and the standard temperature range of the refrigerator compartment includes: The endpoints of the standard temperature range are the on-state and off-state temperatures of the temperature control contacts of the differential mechanical temperature controller, respectively, and the on-state temperature is greater than the off-state temperature; if the target temperature is greater than or equal to the on-state temperature, then a high-level signal is determined to be the control signal for the direct-cooling refrigerator; if the target temperature is less than or equal to the off-state temperature, then a low-level signal is determined to be the control signal for the direct-cooling refrigerator. The step of inputting the control signal to the inverter drive board of the direct-cooling refrigerator to control the compressor of the direct-cooling refrigerator includes: The control signal is input to the inverter drive board of the direct-cooling refrigerator. If the control signal is a high-level signal, the compressor is controlled to run; if the control signal is a low-level signal, the compressor is controlled to shut down.

3. The direct-cooling refrigerator control method according to claim 1, characterized in that, Before generating the control signal for the direct-cooling refrigerator based on the target temperature and the standard temperature range of the refrigerator compartment, the process includes: Obtain the cooling mode of the direct-cooling refrigerator; If the cooling mode is a strong cooling mode, then the preset first temperature range is set as the standard temperature range; If the cooling mode is intercooling mode, then the preset second temperature range is set as the standard temperature range; If the cooling mode is low cooling mode, then the preset third temperature range is set as the standard temperature range.

4. The direct-cooling refrigerator control method according to any one of claims 1-3, characterized in that, After inputting the control signal to the inverter drive board of the direct-cooling refrigerator to control the compressor of the direct-cooling refrigerator, the process includes: Obtain the temperature at the freezer door seal of the freezer compartment of the direct-cooling refrigerator; The heat load of the freezer compartment is obtained based on the temperature at the freezer door seal and the preset target temperature threshold of the freezer compartment. The compression power of the compressor is adjusted according to the heat load.

5. A direct-cooling refrigerator, characterized in that, The direct-cooling refrigerator includes: a temperature sensor with communication connection, a differential mechanical temperature controller, a frequency converter drive board, a processor, and a memory; The temperature sensor is used to obtain the target temperature of the refrigerator compartment in the direct-cooling refrigerator; The processor is used to send the target temperature to the differential mechanical temperature controller; The differential mechanical temperature controller is used to control the switching of the AC voltage signal flowing into the direct-cooling refrigerator to form a control signal based on the target temperature and the standard temperature range of the refrigerator compartment in the direct-cooling refrigerator. The processor is used to receive the control signal sent by the differential mechanical temperature controller and drive the frequency converter drive board. The variable frequency drive board is used to control the compressor of the direct-cooling refrigerator according to the control signal until the target temperature meets the standard temperature range; The processor is also configured to respond to the start-up command of the direct-cooling refrigerator, control the compressor to operate according to a preset compression power; and to count the running time of the compressor, if the running time exceeds a preset time, increase the preset compression power, if the running time is less than the preset time, maintain the preset compression power of the compressor; and / or count the starting frequency of the compressor; if the starting frequency is less than a first preset frequency, decrease the preset compression power of the compressor; if the starting frequency is greater than a second preset frequency, increase the preset compression power of the compressor.

6. The direct-cooling refrigerator according to claim 5, characterized in that, The direct-cooling refrigerator also includes: A cavity sensor bracket is disposed on the evaporator base plate of the direct-cooling refrigerator and placed separately from the evaporator; The temperature sensor, located inside the cavity sensor bracket, is used to collect the target temperature on the back insulation side of the cold storage compartment.

7. The direct-cooling refrigerator according to claim 5, characterized in that, The direct-cooling refrigerator also includes: Compensating heating wire; The compensating heating wire is located on the back of the refrigerator compartment of the direct-cooling refrigerator.

8. The direct-cooling refrigerator according to claim 5, characterized in that, The direct-cooling refrigerator also includes: First evaporator and second evaporator; The compressor is connected to the first evaporator and the second evaporator; The first evaporator is located behind the refrigerator compartment of the direct-cooling refrigerator and is used to adjust the temperature of the refrigerator compartment according to the compression power of the compressor. The second evaporator is located behind the freezer compartment of the direct-cooling refrigerator and is used to adjust the temperature of the freezer compartment of the direct-cooling refrigerator according to the compression power of the compressor.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a plurality of instructions adapted for loading by a processor to perform the steps of the direct-cooling refrigerator control method as described in any one of claims 1 to 4.

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