Refrigeration appliance temperature control method and refrigeration appliance

Abstract

This invention discloses a temperature control method and a refrigeration device for refrigeration equipment. The temperature control method includes the following steps: determining whether the duration of the high-temperature anomaly inside the chamber, t, exceeds a threshold; wherein, the duration of the high-temperature anomaly, t, is the cumulative time of the high-temperature anomaly within a preset period or the duration of the high-temperature anomaly within a preset period; and activating a quick-freezing mode when the duration of the high-temperature anomaly, t, exceeds the threshold. This invention uses the duration of the high-temperature anomaly inside the chamber as a criterion for judgment. When the duration of the high-temperature anomaly is long, it is determined that insufficient cooling capacity inside the chamber is causing the temperature anomaly, thereby automatically activating the quick-freezing mode. This allows for the rapid replenishment of cooling capacity inside the chamber, preventing damage to items stored inside the chamber due to temperature anomalies.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, and in particular to refrigeration equipment temperature control methods and refrigeration equipment. Background Technology

[0002] Ultra-low temperature cabinets are a type of storage chamber that can lower the internal temperature to a very low level and maintain that low temperature. Ultra-low temperature cabinets, such as medical cryogenic freezers, are used to preserve valuable medical supplies. Medical cryogenic freezers are essential equipment for hospitals, blood banks, epidemic prevention stations, higher medical colleges, and research institutions.

[0003] Ultra-low temperature freezers can reach even lower temperatures than ordinary freezers, but because the required temperature is lower, the energy consumption and heat generated by heat exchange are also greater. Because ultra-low temperature freezers need to maintain such low temperatures, and due to the large pressure difference between evaporation and condensation and the limitations of compressors, a single compressor is often insufficient to meet the requirements. Therefore, ultra-low temperature freezers currently commonly employ a dual-compressor cascade refrigeration system.

[0004] Although existing ultra-low temperature freezers use dual-compressor refrigeration equipment, the control logic of dual-compressor refrigeration equipment is simple. It only controls the compressor to start and stop based on the temperature start-up point inside the freezer. When it is necessary to quickly freeze the contents of the freezer, it is usually controlled by manual buttons. The manual button control method is prone to failure due to human negligence, which may cause the contents of the freezer to not recover quickly and effectively, thus affecting the damage to the items stored in the ultra-low temperature freezer. Summary of the Invention

[0005] The purpose of this invention is to provide a temperature control method for refrigeration equipment to overcome the shortcomings of the prior art. It can automatically activate the quick-freeze mode to quickly replenish the cold air in the box and avoid damage to the items stored in the box caused by abnormal temperature.

[0006] This invention provides a temperature control method for refrigeration equipment, comprising the following steps:

[0007] Determine whether the duration t of the high temperature anomaly inside the chamber exceeds the threshold; where the duration t of the high temperature anomaly is the cumulative time of the high temperature anomaly within a preset period or the duration of the high temperature anomaly within a preset period.

[0008] The quick-freeze mode is activated when the duration of the high temperature anomaly, t, exceeds the threshold.

[0009] Furthermore, the step of "determining whether the duration t of the abnormal high temperature inside the chamber exceeds the threshold" includes the following steps:

[0010] Obtain the temperature difference ΔT between the temperature T inside the chamber and the preset temperature Ts, and determine whether the temperature difference ΔT exceeds the preset high temperature value ΔTg.

[0011] The total time tg during which the temperature difference ΔT exceeds the high temperature preset value ΔTg within the first preset period M1 is calculated.

[0012] Determine whether tg exceeds the first threshold t1.

[0013] Furthermore, the step of "determining whether the duration t of the abnormal high temperature inside the chamber exceeds the threshold" includes the following steps:

[0014] Real-time temperature difference ΔT between the internal temperature T and the preset temperature Ts is obtained.

[0015] Determine whether the temperature difference ΔT exceeds the high temperature preset value ΔTg, and calculate the total high temperature anomaly time tg in the first preset period M1 when the temperature difference ΔT exceeds the high temperature preset value Tg.

[0016] Determine whether the temperature difference ΔT is lower than the low temperature preset value ΔTd, and calculate the total low temperature anomaly time td within the first preset period M1 when the temperature difference ΔT is lower than the low temperature preset value Td;

[0017] Obtain the time difference Δt between the total time tg of the high temperature anomaly and the total time td of the low temperature anomaly;

[0018] Determine whether the time difference Δt exceeds the second threshold t2.

[0019] Furthermore, the step of "determining whether the duration t of the abnormal high temperature inside the chamber exceeds the threshold" includes the following steps:

[0020] The temperature difference ΔT between the temperature T inside the chamber and the preset temperature Ts is obtained in real time.

[0021] Determine whether the temperature difference ΔT exceeds the high temperature preset value ΔTg, and calculate the continuous time tc during which the temperature difference ΔT continuously exceeds the high temperature preset value ΔTg. Then determine whether the continuous time tc exceeds the third threshold t3.

[0022] Furthermore, the "activate quick-freeze mode when the threshold is exceeded" is implemented in the following way:

[0023] The dual compressors are controlled to operate simultaneously, including a fixed-frequency compressor and a variable-frequency compressor. When the dual compressors are controlled to operate simultaneously, the fixed-frequency compressor is controlled to start and the variable-frequency compressor is controlled to run at the maximum speed preset in the ambient temperature range.

[0024] After the dual compressors have been running simultaneously for a predetermined time, the quick-freezing mode will automatically exit.

[0025] Furthermore, the "activate quick-freeze mode when the threshold is exceeded" is implemented by lowering the preset temperature Ts to Tt.

[0026] Furthermore, after activating the freeze mode, the following steps are also included:

[0027] Obtain the temperature difference ΔT between the temperature T inside the chamber and the preset temperature Tt;

[0028] Determine whether the temperature difference ΔT is lower than the preset low temperature value ΔTd;

[0029] The total time td during which the temperature difference ΔT is lower than the low temperature preset value Td within the first preset period M1 is calculated cumulatively.

[0030] After the total time of low temperature anomaly td exceeds the fourth threshold t4, the preset temperature is adjusted from Tt to Ts and the quick-freeze mode is exited.

[0031] Furthermore, after activating the freeze mode, the following steps are also included:

[0032] Obtain the temperature difference ΔT between the temperature T inside the chamber and the preset temperature Tt;

[0033] Determine whether the temperature difference ΔT exceeds the high temperature preset value ΔTg, and calculate the total high temperature anomaly time tg in the first preset period M1 when the temperature difference ΔT exceeds the high temperature preset value Tg.

[0034] Determine whether the temperature difference ΔT is lower than the low temperature preset value ΔTd, and calculate the total low temperature anomaly time td within the first preset period M1 when the temperature difference ΔT is lower than the low temperature preset value Td;

[0035] Obtain the time difference Δt between the total time of low temperature anomaly td and the total time of high temperature anomaly tg. After the time difference Δt is greater than the fifth threshold t5, adjust the preset temperature from Tt to Ts and exit the quick-freeze mode.

[0036] Furthermore, after activating the freeze mode, the following steps are also included:

[0037] Obtain the temperature difference ΔT between the temperature T inside the chamber and the preset temperature Tt;

[0038] Determine whether the temperature difference ΔT is lower than the preset low temperature value ΔTd;

[0039] Calculate the continuous time tm during which the temperature difference ΔT remains below the preset low temperature value ΔTd;

[0040] After tm exceeds the sixth threshold t6, the preset temperature is adjusted from Tt to Ts, and the quick-freeze mode is exited.

[0041] Another embodiment of the present invention discloses a refrigeration device employing the aforementioned refrigeration device temperature control method, comprising:

[0042] The judgment module is used to determine whether the duration t of the high temperature abnormality inside the chamber exceeds the threshold.

[0043] The execution module is used to activate the quick-freeze mode when the duration t of the high-temperature anomaly exceeds the threshold.

[0044] Compared with the prior art, the embodiments of the present invention use the duration of high temperature anomalies inside the box as the criterion. When the duration of high temperature anomalies is long, it is determined that the cold air inside the box is insufficient, causing the temperature anomaly. Based on this, the quick-freezing mode is automatically activated, which can quickly replenish the cold air inside the box and avoid damage to the items stored in the box caused by temperature anomalies. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the flow structure of the temperature control method for refrigeration equipment disclosed in an embodiment of the present invention;

[0046] Figure 2 This is a flowchart of the first step in determining the duration t of high temperature anomaly in the temperature control method for refrigeration equipment disclosed in the embodiments of the present invention;

[0047] Figure 3 This is a flowchart of the second method for determining the duration t of high temperature anomaly in the temperature control method for refrigeration equipment disclosed in the embodiments of the present invention; Detailed Implementation

[0048] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0049] An embodiment of the present invention discloses a temperature control method for refrigeration equipment. This temperature control method is mainly applied to ultra-low temperature freezers. When the cooling capacity inside the ultra-low temperature freezer is insufficient, it can automatically start a quick-freezing mode, thereby quickly replenishing the cooling capacity lost inside the ultra-low temperature freezer, ensuring the stability of the temperature inside the ultra-low temperature freezer, and avoiding damage to biological samples or medical supplies stored inside the ultra-low temperature freezer.

[0050] Specifically, such as Figure 1 As shown, the temperature control method for the refrigeration equipment disclosed in this embodiment includes the following steps:

[0051] Determine whether the duration t of the high temperature anomaly inside the chamber exceeds the threshold; where the duration t of the high temperature anomaly is the cumulative time of the high temperature anomaly within a preset period or the duration of the high temperature anomaly within a preset period.

[0052] The quick-freeze mode is activated when the duration of the high temperature anomaly, t, exceeds the threshold.

[0053] This embodiment uses the duration of abnormal high temperatures within the chamber as a criterion. When the abnormal high-temperature duration is prolonged, it is determined that insufficient cooling capacity within the chamber is causing the temperature anomaly. Based on this, the quick-freezing mode is automatically activated, rapidly replenishing the cooling capacity and preventing damage to the stored items caused by temperature abnormalities. The temperature control method disclosed in this embodiment is primarily used in ultra-low temperature freezers, which typically store biological materials or medical supplies. These items have high temperature requirements; abnormal temperature fluctuations can affect their biological activity and, in severe cases, damage the stored items.

[0054] In existing technologies, quick-freezing modes are typically operated manually via function buttons on a display panel. Since significant cold air loss occurs after the door is opened, quick-freezing mode usually needs to be activated after the door is closed to replenish the cold air. This embodiment automatically triggers the quick-freezing mode, thereby achieving rapid replenishment of cold air inside the box, preventing abnormal temperatures, and better storing the items.

[0055] For ultra-low temperature freezers, the internal temperature is set relatively low, generally between -40 and 80°C. The internal temperature is generally relatively stable, mainly affected by the high ambient temperature and the opening of the door. Since the lower the internal temperature, the greater the loss of cold air when the door is opened, the more obvious the fluctuations are.

[0056] This embodiment uses the duration t of the high temperature anomaly as the indicator for activating the quick-freeze mode. Compared with simply using temperature as the indicator, it can more accurately achieve timely compensation of the cold air in the cabinet. As mentioned earlier, since the temperature inside the cabinet is low, the loss of cold air after the door is opened is relatively large, and the temperature fluctuation is relatively large. If temperature is simply used as the activation indicator for the quick-freeze mode, the quick-freeze mode will be activated more frequently, and the quick-freeze mode will be activated when it is not necessary, which will not accurately achieve the activation of the quick-freeze mode.

[0057] In this embodiment, the high-temperature anomaly duration t is defined as follows: if the temperature inside the chamber remains consistently higher than the preset value within a certain time period, or if the temperature inside the chamber accumulates to be higher than the preset value for a relatively long period within a certain time, it indicates that the existing refrigeration conditions cannot meet the actual needs, and therefore a quick-freeze mode needs to be used. It should be noted that the quick-freeze mode can be activated as long as one of the above conditions is met.

[0058] like Figure 2 As shown in the specific embodiment, the step of "determining whether the duration t of the high temperature anomaly inside the chamber exceeds the threshold" includes the following steps:

[0059] The temperature difference ΔT between the internal temperature T and the preset temperature Ts is obtained, and it is determined whether the temperature difference ΔT exceeds the preset high-temperature value ΔTg. The temperature difference ΔT represents the difference between the internal temperature and the preset ideal temperature. If the difference is large, that is, exceeds the preset high-temperature value ΔTg, it means that the internal temperature does not meet the requirements. The preset temperature Ts can be adjusted and set by the user according to actual needs, and the general range is -40℃ to 86℃ depending on the product requirements. ΔTg is generally set to 5℃ to 10℃, that is, the internal temperature difference and the preset temperature difference are generally within 10℃ to meet the actual requirements.

[0060] The total time tg during which the temperature difference ΔT exceeds the high temperature preset value ΔTg within the first preset period M1 is calculated.

[0061] Determine if tg exceeds the first threshold t1. When the temperature difference ΔT exceeds the preset high temperature value ΔTg, it indicates that there is a high temperature anomaly. Determine the cumulative time tg of this high temperature anomaly within the first preset period M1. If the cumulative time tg is relatively long, such as exceeding the first threshold t1, it indicates that there are relatively many high temperature conditions within the first preset period M1, indicating that the refrigeration unit cannot meet the actual demand inside the unit, and therefore the rapid cooling mode needs to be activated.

[0062] In actual use, the first preset cycle M1 is generally set to 24 hours, while the cumulative time tg is generally set to 2 hours. The above judgment process only assesses the time of high-temperature anomalies within the first preset cycle. However, in actual use, if a low-temperature anomaly occurs, i.e., the temperature inside the unit is lower than the general preset value, the low-temperature anomaly can compensate for the cooling loss caused by the high-temperature anomaly, thus not affecting the overall cooling of the refrigeration unit. In this case, the rapid cooling mode does not need to be activated. Therefore, before activating the rapid cooling mode, it is necessary to rule out the compensation for cooling loss caused by the low-temperature anomaly.

[0063] Specifically, determining whether the duration t of the abnormal high temperature inside the chamber exceeds the threshold also includes the following steps:

[0064] Real-time temperature difference ΔT between the internal temperature T and the preset temperature Ts is obtained.

[0065] Determine if the temperature difference ΔT is lower than the preset low-temperature value ΔTd, and accumulate the total time td during which the temperature difference ΔT is lower than the preset low-temperature value Td within the first preset cycle M1. This step involves calculating the cumulative time the chamber is in a low-temperature abnormality state within the first preset cycle M1. When in a low-temperature abnormality state, the cooling capacity is over-supplied, which can compensate for the cooling capacity required under high-temperature abnormal conditions. Therefore, to more accurately activate the quick-freeze mode, it is necessary to exclude situations where automatic compensation is possible. Therefore, as... Figure 3 The diagram also includes the following steps:

[0066] Obtain the time difference Δt between the total time tg of the high temperature anomaly and the total time td of the low temperature anomaly;

[0067] Determine whether the time difference Δt exceeds the second threshold t2.

[0068] This time difference △t actually indicates the difference between the total time of the high temperature anomaly and the total time of the low temperature anomaly. Only when the time difference △t exceeds the second threshold t2 does it indicate that the duration of the high temperature anomaly is relatively long. Therefore, it is necessary to reduce the cooling capacity in the chamber. At this time, the rapid cooling mode needs to be activated.

[0069] The conditions for activating the rapid cooling mode described above, which obtain the temperature change inside the chamber within a certain preset period, are more focused on resolving temperature anomalies caused by ambient temperature. During the above judgment process, the overall temperature change inside the chamber is relatively stable with relatively few fluctuations. For temperature fluctuations caused by opening the door, the following judgment conditions are used for assessment.

[0070] The temperature difference ΔT between the temperature T inside the chamber and the preset temperature Ts is obtained in real time.

[0071] The system determines whether the temperature difference ΔT exceeds the preset high-temperature value ΔTg, and calculates the continuous time tc during which the temperature difference ΔT continuously exceeds the preset high-temperature value ΔTg. It then determines whether the continuous time tc exceeds the third threshold t3. Unlike the previous determination condition, the determination condition in this embodiment is actually the duration of the high-temperature anomaly. After the door is opened, due to significant cold loss, the high-temperature anomaly inside the cabinet may persist for a relatively longer period, resulting in a continuous high-temperature anomaly. In this embodiment, the continuous time tc of the continuous high-temperature anomaly is generally set to 30 minutes. If the cabinet remains in a high-temperature anomaly state for 30 minutes, the quick-freeze mode needs to be activated.

[0072] The "Activate quick-freeze mode when threshold is exceeded" function is implemented as follows:

[0073] The system controls the simultaneous operation of two compressors, including a fixed-frequency compressor and a variable-frequency compressor. When the two compressors are running simultaneously, the fixed-frequency compressor is turned on and the variable-frequency compressor is simultaneously controlled to run at the maximum speed preset in the ambient temperature range. After the two compressors have been running simultaneously for a predetermined time, the system automatically exits the quick-freezing mode.

[0074] This embodiment employs a dual-compressor system, meaning it has two refrigeration systems, each with one compressor. Specifically, the two refrigeration systems are a first refrigeration system and a second refrigeration system. The first refrigeration system includes a fixed-frequency compressor, condenser, condenser pipe, dryer filter, heat exchanger, capillary tube, and evaporator. The second refrigeration system also includes a fixed-frequency compressor, condenser, dryer filter, heat exchanger, capillary tube, and evaporator. The evaporators of both refrigeration systems are evenly arranged and staggered on the inner liner. Under normal operating conditions, only one compressor (i.e., one refrigeration system) needs to be used. In quick-cooling mode, to enhance the cooling capacity, both compressors are typically started simultaneously, using both refrigeration systems. After a certain period, they automatically shut down to achieve energy savings. The simultaneous operation time of both compressors in quick-cooling mode is typically set to 30 minutes, meaning the quick-cooling mode automatically exits after half an hour. It is understood that the specific simultaneous operation time of the two compressors can be adjusted according to actual needs.

[0075] In another embodiment, after the quick-cooling mode is activated, the temperature can also be controlled by lowering the preset temperature. Specifically, after the quick-freeze mode is activated, the original user-set preset temperature Ts is lowered to Tt, where Tt is less than Ts. In specific embodiments, it is generally about 5°C lower than the original preset temperature. Lowering the preset temperature can indirectly increase the working time of the refrigeration unit, thereby providing more cooling capacity and thus reducing the temperature inside the cabinet.

[0076] When using a lower preset temperature to achieve quick-freeze mode, the preset temperature needs to be adjusted back to the user-set value after the quick-freeze mode ends. To achieve automatic adjustment of the preset temperature, the following methods are used. Specifically, after starting the freezing mode, the following steps are also included:

[0077] Obtain the temperature difference ΔT between the temperature T inside the chamber and the preset temperature Tt; this step is actually obtaining the temperature difference between the temperature inside the chamber and the adjusted preset temperature Tt. Obtaining this data can objectively determine whether the temperature inside the chamber has reached the adjusted preset temperature.

[0078] Determine whether the temperature difference ΔT is lower than the preset low temperature value ΔTd;

[0079] The total time td during which the temperature difference ΔT is lower than the preset low temperature value Td within the first preset period M1 is calculated. This step is actually to determine whether the cooling capacity inside the chamber is sufficient. If the temperature inside the chamber is low enough, it indicates that the cooling capacity inside the chamber is sufficient to deactivate the quick-freeze mode. In order to achieve more precise control, the cumulative time below the preset low temperature value Td within the first preset period M1 is statistically analyzed. This method can more objectively reflect the cooling status inside the chamber.

[0080] If the total time of the low-temperature anomaly td exceeds the fourth threshold t4, the preset temperature will be adjusted from Tt to Ts and the quick-freeze mode will be exited. If the total time of the low-temperature anomaly td exceeds the fourth threshold t4, it indicates that the chamber has been at ultra-low temperatures for a longer period, indicating sufficient cooling capacity inside the chamber, thus objectively reflecting that the quick-cooling mode can be exited.

[0081] It should be noted that the first preset period M1, the low temperature preset value, and the fourth threshold in the above scheme can all be adjusted according to the specific usage. In this embodiment, the fourth threshold is generally set to 2 hours.

[0082] The above embodiment determines whether the internal temperature meets the requirements by accumulating the duration of low temperature within a certain preset period M1. In another embodiment, other methods can also be used as judgment conditions to deactivate the quick-freeze mode. Specifically, after starting the freezing mode, the following steps are also included:

[0083] Obtain the temperature difference ΔT between the temperature T inside the chamber and the preset temperature Tt;

[0084] Determine whether the temperature difference ΔT exceeds the high temperature preset value ΔTg, and calculate the total high temperature anomaly time tg in the first preset period M1 when the temperature difference ΔT exceeds the high temperature preset value Tg.

[0085] Determine whether the temperature difference ΔT is lower than the low temperature preset value ΔTd, and calculate the total low temperature anomaly time td within the first preset period M1 when the temperature difference ΔT is lower than the low temperature preset value Td;

[0086] Obtain the time difference Δt between the total time of low temperature anomaly td and the total time of high temperature anomaly tg. After the time difference Δt is greater than the fifth threshold t5, adjust the preset temperature from Tt to Ts and exit the quick-freeze mode.

[0087] In this embodiment, the energy loss caused by high temperature anomalies is actually taken into account. When evaluating whether the temperature inside the chamber meets the requirements, it is not enough to only consider that the total time of low temperature anomalies has met the requirements. The loss of cooling capacity caused by high temperature anomalies within the first preset period should also be deducted. Therefore, in this embodiment, when evaluating whether the cooling capacity inside the chamber has met the requirements, the high temperature anomaly time within the first preset period needs to be subtracted. The settings of the above embodiment can more accurately determine the stop time of the quick-freezing mode.

[0088] It should be noted that in the above embodiments, the first preset cycle, the high temperature preset value, and the low temperature preset value can all be set according to actual needs. The symbols in the above embodiments are just an identifier and can be consistent with those in the aforementioned start-up rapid cooling mode or can be reset according to actual needs.

[0089] The above embodiments determine whether the rapid cooling mode needs to be deactivated by accumulating the duration of low-temperature anomalies within a predetermined period. Other embodiments may also determine the deactivation of the rapid freezing module by observing the continuous occurrence of low-temperature anomalies within a short period. The specific solutions are as follows:

[0090] After activating the freeze mode, the following steps are also included:

[0091] Obtain the temperature difference ΔT between the temperature T inside the chamber and the preset temperature Tt;

[0092] Determine whether the temperature difference ΔT is lower than the preset low temperature value ΔTd;

[0093] Calculate the continuous time tm during which the temperature difference ΔT remains below the preset low temperature value ΔTd;

[0094] After tm exceeds the sixth threshold t6, the preset temperature is adjusted from Tt to Ts, and the quick-freeze mode is exited.

[0095] In this embodiment, if the temperature inside the chamber remains below the preset temperature Tt for an extended period, it indicates that the cooling capacity is sufficient, thus indirectly indicating that the rapid cooling mode can be deactivated.

[0096] Another embodiment of the present invention discloses a refrigeration device employing the aforementioned refrigeration device temperature control method, comprising:

[0097] The judgment module is used to determine whether the duration t of the high temperature abnormality inside the chamber exceeds the threshold.

[0098] The execution module is used to activate the quick-freeze mode when the duration t of the high-temperature anomaly exceeds the threshold.

[0099] The above description, based on the embodiments shown in the figures, details the structure, features, and effects of the present invention. The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A temperature control method for refrigeration equipment, characterized in that, Includes the following steps: Obtain the temperature difference ΔT between the temperature T inside the chamber and the preset temperature Ts, and determine whether the temperature difference ΔT exceeds the preset high temperature value ΔTg. The total time tg during which the temperature difference ΔT exceeds the high temperature preset value ΔTg within the first preset period M1 is calculated. Determine whether tg exceeds the first threshold t1; If tg exceeds the first threshold t1, determine whether the temperature difference ΔT is lower than the low temperature preset value ΔTd, and calculate the total low temperature anomaly time td within the first preset period M1 when the temperature difference ΔT is lower than the low temperature preset value Td. Obtain the time difference Δt between the total time tg of the high temperature anomaly and the total time td of the low temperature anomaly; Determine whether the time difference Δt exceeds the second threshold t2; The quick-freeze mode is activated when the time difference Δt exceeds the second threshold t2.

2. The temperature control method for refrigeration equipment according to claim 1, characterized in that, The "activate quick-freeze mode when the second threshold t2 is exceeded" is implemented in the following way: The dual compressors are controlled to operate simultaneously, including a fixed-frequency compressor and a variable-frequency compressor. When the dual compressors are controlled to operate simultaneously, the fixed-frequency compressor is controlled to start and the variable-frequency compressor is controlled to run at the maximum speed preset in the ambient temperature range. After the dual compressors have been running simultaneously for a predetermined time, the quick-freezing mode will automatically exit.

3. The temperature control method for refrigeration equipment according to claim 1, characterized in that... "Activate quick-freeze mode when the second threshold t2 is exceeded" is implemented by lowering the preset temperature Ts to Tt.

4. The temperature control method for refrigeration equipment according to claim 3, characterized in that, After activating the freeze mode, the following steps are also included: Obtain the temperature difference ΔT between the temperature T inside the chamber and the preset temperature Tt; Determine whether the temperature difference ΔT is lower than the preset low temperature value ΔTd; The total time td during which the temperature difference ΔT is lower than the low temperature preset value Td within the first preset period M1 is calculated cumulatively. After the total time of low temperature anomaly td exceeds the fourth threshold t4, the preset temperature is adjusted from Tt to Ts and the quick-freeze mode is exited.

5. The temperature control method for refrigeration equipment according to claim 3, characterized in that, After activating the freeze mode, the following steps are also included: Obtain the temperature difference ΔT between the temperature T inside the chamber and the preset temperature Tt; Determine whether the temperature difference ΔT exceeds the high temperature preset value ΔTg, and calculate the total high temperature anomaly time tg in the first preset period M1 when the temperature difference ΔT exceeds the high temperature preset value Tg. Determine whether the temperature difference ΔT is lower than the low temperature preset value ΔTd, and calculate the total low temperature anomaly time td within the first preset period M1 when the temperature difference ΔT is lower than the low temperature preset value Td; Obtain the time difference Δt between the total time of low temperature anomaly td and the total time of high temperature anomaly tg. After the time difference Δt is greater than the fifth threshold t5, adjust the preset temperature from Tt to Ts and exit the quick-freeze mode.

6. The temperature control method for refrigeration equipment according to claim 3, characterized in that, After activating the freeze mode, the following steps are also included: Obtain the temperature difference ΔT between the temperature T inside the chamber and the preset temperature Tt; Determine whether the temperature difference ΔT is lower than the preset low temperature value ΔTd; Calculate the continuous time tm during which the temperature difference ΔT remains below the preset low temperature value ΔTd; After tm exceeds the sixth threshold t6, the preset temperature is adjusted from Tt to Ts, and the quick-freeze mode is exited.

7. A refrigeration device employing the temperature control method for refrigeration equipment as described in any one of claims 1 to 6, characterized in that, include: The judgment module is used to determine whether the time difference Δt inside the box exceeds the second threshold t2; The execution module is used to start the quick-freeze mode when the time difference Δt exceeds the second threshold t2.

Images