A defrosting method, defrosting device and cold storage device for a cold storage equipment

Abstract

The present invention provides a defrosting method, a defrosting device and a cold storage device for a cold storage device. The defrosting mode of the cold storage device is provided with a pre-cooling stage, and the pre-cooling stage is used to lower the shutdown point of the freezer compartment. The defrosting method includes: when the cold storage device enters the defrosting mode, first control the cold storage device to enter the pre-cooling stage; during the pre-cooling stage, determine the control rule of the pre-cooling stage according to the external ambient temperature, and determine the new shutdown point of the freezer compartment according to the control rule; control the cold storage device to defrost and operate according to the new shutdown point of the freezer compartment. Through the defrosting method of this embodiment, the control rule of the compressor can be changed, the shutdown point of the freezer compartment can be lowered, the temperature of the freezer compartment can be slightly lowered, and the temperature rise of the freezer compartment during defrosting can be prevented from being too large.

Description

Technical Field

[0001] The present invention belongs to the field of cold storage equipment, and particularly relates to a defrosting method, a defrosting device and a cold storage equipment for a cold storage equipment. Background Art

[0002] During the development of new refrigerator products, the 3K temperature has always been an important indicator to measure whether the performance tests of certain refrigerators are qualified, especially the storage temperature test and the freezing capacity test in the national standard "GBT 8059-2016 Household and Similar Refrigerating Appliances". This 3K refers to the difference between the highest temperature reached by the compartment during defrosting and the recovery period and the highest temperature during the stable refrigeration stage before defrosting. The national standard requires that both the storage temperature test and the freezing capacity test need to meet the requirement of less than 3K. In actual new product development tests, these two experiments often have the problem of exceeding 3K, especially in the high ambient temperature stage. When the refrigerator is in the defrosting and its recovery period, the compartment stops refrigerating. Due to the influence of the high ambient temperature outside the refrigerator body and the heat generated during defrosting heating, the temperature of the compartment rises rapidly during this period and exceeds 3K. This problem often occurs during the new product development process in the industry. To solve this problem, it is generally solved from two aspects. On the one hand, key structures and key devices are adjusted from the system aspect. Since the refrigerator system has been finalized during the previous development, starting from here costs more and wastes experimental resources. On the other hand, the refrigeration defrosting rules of the refrigerator are adjusted to solve this problem.

[0003] Before defrosting the refrigerator, the related technology controls the refrigerator to enter a preset refrigeration mode, but does not consider the specific high ambient temperature stage. The defrosting situation in this stage has a greater impact on the temperature rise of the compartment, and reducing the shutdown point of the refrigerating compartment during the refrigeration stage before defrosting heating may cause the items in the refrigerating compartment to freeze due to too low temperature.

[0004] In addition, before defrosting the refrigerator, the related technology controls the refrigerator to enter a pre-cooling stage. This pre-cooling stage is a fixed control rule, which does not consider that defrosting at high ambient temperature has a greater impact on the temperature rise of the compartment. At the same time, the set gear of the refrigerating compartment is not considered during the air inlet and outlet defrosting stage. If the set temperature of the refrigerating compartment is relatively high, the temperature may drop very low after passing through the air outlet defrosting, affecting the temperature uniformity of the compartment. Summary of the Invention

[0005] In view of this, the present invention discloses a defrosting method, a defrosting device and a cold storage equipment for a cold storage equipment, so as to solve the problem of large temperature fluctuations in the compartment during defrosting of the cold storage equipment.

[0006] To solve the above technical problems, the first aspect of the present invention provides a defrosting method for a cold storage equipment. The defrosting mode of the cold storage equipment is provided with a pre-cooling stage for reducing the shutdown point of the freezer. The defrosting method includes:

[0007] When the cold storage device enters the defrosting mode, first control the cold storage device to enter the pre-cooling stage;

[0008] In the pre-cooling stage, determine the control rules for the pre-cooling stage according to the external environmental temperature, and determine the new freezer shutdown point according to the control rules;

[0009] Control the cold storage device to operate in defrosting according to the new freezer shutdown point.

[0010] Further optionally, determining the control rules for the pre-cooling stage according to the external environmental temperature, and determining the new freezer shutdown point according to the control rules, includes:

[0011] Judge the ambient temperature range where the external environmental temperature is located, and enter different pre-cooling stages according to different ambient temperature ranges and determine the corresponding temperature adjustment values; in different pre-cooling stages, determine the corresponding new freezer shutdown points according to the corresponding temperature adjustment values and the freezer set temperature.

[0012] Further optionally, the pre-cooling stage includes a first pre-cooling stage and a second pre-cooling stage. Judge the ambient temperature range where the external environmental temperature is located, and enter different pre-cooling stages according to different ambient temperature ranges and determine the corresponding temperature adjustment values; in different pre-cooling stages, determine the corresponding new freezer shutdown points according to the corresponding temperature adjustment values and the freezer set temperature, includes:

[0013] When the external environmental temperature is greater than the first preset value, enter the first pre-cooling stage, and set the new freezer shutdown point to Tt1, Tt1 = Tds - a2;

[0014] When the external environmental temperature is less than or equal to the first preset value, enter the second pre-cooling stage, and set the new freezer shutdown point to Tt2, Tt2 = Tds - a3;

[0015] Wherein, Tds is the freezer set temperature, a2 is the first temperature adjustment value, a3 is the second temperature adjustment value, a2 > a3 > 0.

[0016] Further optionally, in the pre-cooling stage, the defrosting method further includes:

[0017] Monitor the freezer temperature and record the operation duration of the pre-cooling stage;

[0018] Judge the timing to exit the pre-cooling stage according to the freezer temperature and the operation duration of the pre-cooling stage.

[0019] Further optionally, in the first pre-cooling stage, record the operation duration of the pre-cooling stage as t1, and judge the timing to exit the pre-cooling stage according to the freezer temperature and the operation duration of the pre-cooling stage, includes:

[0020] Judge whether Td satisfies Td ≤ Tt1. If it satisfies, exit the first pre-cooling stage; if it does not satisfy,

[0021] Judge whether t1 satisfies t1≥b1. If it satisfies, exit the first pre-cooling stage. If it does not satisfy,

[0022] Go to the step of judging whether Td satisfies Td≤Tt1;

[0023] wherein, Td represents the freezer temperature, and b1 represents the first preset duration.

[0024] Further optionally, in the second pre-cooling stage, record the operation duration of the pre-cooling stage as t2, and judge the timing of exiting the pre-cooling stage according to the freezer temperature and the operation duration of the pre-cooling stage, including:

[0025] Judge whether Td satisfies Td≤Tt2. If it satisfies, exit the second pre-cooling stage; if it does not satisfy,

[0026] Judge whether t1 satisfies t1≥b2. If it satisfies, exit the second pre-cooling stage. If it does not satisfy,

[0027] Go to the step of judging whether Td satisfies Td≤Tt1;

[0028] wherein, Td represents the freezer temperature, and b2 represents the second preset duration.

[0029] Further optionally, the defrosting process is also provided with a cyclic pre-heating stage and a defrosting heating stage. In the cyclic pre-heating stage, control the refrigerating air damper and the freezer fan to be in the on state. After the pre-cooling stage is completed, the defrosting method further includes:

[0030] Obtain the current refrigerating chamber temperature Tc;

[0031] Judge whether the current refrigerating chamber temperature Tc satisfies the preset condition;

[0032] If it satisfies, enter the cyclic pre-heating stage;

[0033] If it does not satisfy, enter the defrosting heating stage.

[0034] Further optionally, judging whether the current refrigerating chamber temperature Tc satisfies the preset condition includes:

[0035] In the first pre-cooling stage, judge whether Tc satisfies Tc≤a4. If it does not satisfy, it is regarded as satisfying the preset condition;

[0036] In the second pre-cooling stage, judge whether Tc satisfies Tc≤a7. If it does not satisfy, it is regarded as satisfying the preset condition;

[0037] wherein, a4 represents the second preset value, a7 represents the third preset value, and a4<a7.

[0038] Further optionally, the cyclic preheating stage includes a first cyclic preheating stage and a second cyclic preheating stage. In the first precooling stage, the defrosting method includes:

[0039] Obtain the set temperature Tcs of the refrigerating chamber;

[0040] Determine whether Tcs satisfies Tcs < a8. If it satisfies, enter the first cyclic preheating stage;

[0041] If it does not satisfy, enter the second cyclic preheating stage;

[0042] The running duration of the first cyclic preheating stage is less than that of the second cyclic preheating stage, and a8 represents a fourth preset value.

[0043] Further optionally, in the first cyclic preheating stage, the defrosting method further includes:

[0044] Determine the shutdown point Tt3 of the refrigerating chamber corresponding to the set temperature Tcs of the refrigerating chamber;

[0045] Monitor the temperature Tc of the refrigerating chamber and record the cyclic preheating duration t3;

[0046] If it is detected that Tc ≤ Tt3 - a3 or t3 ≥ b3, exit the first cyclic preheating stage;

[0047] a3 represents a third temperature adjustment value, and b3 represents a third preset duration.

[0048] Further optionally, in the second cyclic preheating stage, the defrosting method further includes:

[0049] Determine the shutdown point Tt3 of the refrigerating chamber corresponding to the set temperature Tcs of the refrigerating chamber;

[0050] Monitor the temperature Tc of the refrigerating chamber and record the cyclic preheating duration t4;

[0051] If it is detected that Tc ≤ Tt3 - a4 or t4 ≥ b4, exit the second cyclic preheating stage;

[0052] a4 represents a fourth temperature adjustment value, and b4 represents a fourth preset duration.

[0053] Further optionally, the cyclic preheating stage further includes a third cyclic preheating stage and a fourth cyclic preheating stage. In the second precooling stage, the defrosting method includes:

[0054] Obtain the set temperature Tcs of the refrigerating chamber;

[0055] Determine whether Tcs satisfies Tcs < a8. If it satisfies, enter the third cyclic preheating stage;

[0056] If it does not satisfy, enter the fourth cyclic preheating stage;

[0057] The running duration of the third cycle preheating stage is less than that of the fourth cycle preheating stage, and a8 represents the fourth preset value.

[0058] Further optionally, in the third cycle preheating stage, the defrosting method further includes:

[0059] Determine the refrigerating chamber shutdown point Tt5 corresponding to the set temperature Tcs of the refrigerating chamber;

[0060] Monitor the temperature Tc of the refrigerating chamber and record the cycle preheating duration t4;

[0061] If it is detected that Tc ≤ Tt4 - a5 or t5 ≥ b5, exit the third cycle preheating stage;

[0062] a5 represents the fifth temperature adjustment value, and b5 represents the fifth preset duration.

[0063] Further optionally, in the fourth cycle preheating stage, the defrosting method further includes:

[0064] Determine the refrigerating chamber shutdown point Tt4 corresponding to the set temperature Tcs of the refrigerating chamber;

[0065] Monitor the temperature Tc of the refrigerating chamber and record the cycle preheating duration t6;

[0066] If it is detected that Tc ≤ Tt3 - a6 or t6 ≥ b6, exit the fourth cycle preheating stage, c3 < c4, b5 < b6;

[0067] a6 represents the sixth temperature adjustment value, and b6 represents the sixth preset duration.

[0068] The second aspect of the present invention provides a defrosting device for a cold storage device, which includes one or more processors and a non - transitory computer - readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the method according to any one of the first aspect.

[0069] The third aspect of the present invention provides a cold storage device, which adopts the method according to any one of the first aspect, or includes the device according to the second aspect.

[0070] After adopting the above - mentioned technical solutions, the present invention has the following beneficial effects compared with the prior art:

[0071] The present invention first determines the control rules for the pre-cooling stage based on the ambient temperature when the cold storage device enters the defrosting cycle, reduces the shutdown point of the freezer compartment, and prevents the temperature in the freezer compartment from rising significantly during defrosting. After the pre-cooling stage is completed, the cyclic pre-heating stage is determined based on the temperature sensor of the refrigerating compartment collected. In this stage, by opening the refrigerating air damper and the freezer fan, the air between the refrigerating compartment, the freezer compartment, and the evaporator is circulated. On the one hand, the cold air in the freezer compartment and the evaporator can be blown into the refrigerating compartment to reduce the temperature in the refrigerating compartment and prevent a large temperature rise after defrosting. On the other hand, the hot air (relatively) in the refrigerating compartment is circulated to the freezer compartment and the evaporator for pre-heating defrosting in advance, which can shorten the opening time of the defrosting heater in the next stage to a certain extent, save the energy consumption of the cold storage device, and improve the stability and reliability of defrosting.

[0072] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0074] Figure 1 is one of the schematic flowcharts of the defrosting method of the cold storage device according to an embodiment of the present invention.

[0075] Figure 2 is the second of the schematic flowcharts of the defrosting method of the cold storage device according to an embodiment of the present invention.

[0076] Figure 3 is the third of the schematic flowcharts of the defrosting method of the cold storage device according to an embodiment of the present invention.

[0077] Figure 4 is the fourth of the schematic flowcharts of the defrosting method of the cold storage device according to an embodiment of the present invention.

[0078] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0079] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inner" and "outer" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0080] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "contacted", and "communicated" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] To solve the problem of large temperature fluctuations in the cold storage equipment during the defrosting time chamber, the first aspect embodiment of the present invention provides a defrosting method for cold storage equipment. The cold storage equipment is preferably a refrigerator, and the defrosting mode of the cold storage equipment is provided with a pre-cooling stage, and the pre-cooling stage is used to lower the freezer shutdown point.

[0082] The following will describe the defrosting method of the cold storage equipment in this embodiment with reference to the drawings.

[0083] Combined with Figure 1 the process schematic diagram, the defrosting method includes S1 to S3, where:

[0084] S1, when the cold storage equipment enters the defrosting mode, first control the cold storage equipment to enter the pre-cooling stage;

[0085] S2, in the pre-cooling stage, determine the control rule of the pre-cooling stage according to the external environmental temperature, and determine the new freezer shutdown point according to the control rule;

[0086] S3, control the defrosting operation of the cold storage equipment according to the new freezer shutdown point.

[0087] Generally, the defrosting heater is below the freezing evaporator, and it has a greater impact on the freezer temperature during defrosting. At the same time, high ambient temperature has a greater impact on the temperature rise before and after defrosting of the compartment. Therefore, in this embodiment, first change the control rule of the compressor according to the external environmental temperature when the refrigerator enters the defrosting mode, and lower the freezer shutdown point, which can slightly lower the temperature of the freezer, reduce the temperature fluctuation of the freezer, prevent the freezer temperature from rising too much during defrosting, and ensure the temperature uniformity of the compartment.

[0088] Further optionally, combined with Figure 2 the process schematic diagram, S2 includes S21 to S23, where:

[0089] S21. Determine the ambient temperature range in which the external environment temperature is located;

[0090] Considering that high ambient temperature has a greater impact on the temperature rise before and after the compartment defrosting, the ambient temperature range is generally divided into two cases: high ambient temperature and non-high ambient temperature, but not limited to these two cases;

[0091] S22. Enter different pre-cooling stages according to different ambient temperature ranges and determine the corresponding temperature adjustment values;

[0092] S23. In different pre-cooling stages, determine the corresponding new freezer shutdown points according to the corresponding temperature adjustment values and the freezer set temperature.

[0093] Specifically, under different ambient temperature ranges, different pre-cooling stage control rules are set to determine different new freezer shutdown points, optimize the refrigeration control of the compressor and the defrosting control, and reduce the influence of the high and low of the external ambient temperature on the temperature rise of the compartments during defrosting of the refrigerator.

[0094] Further optionally, taking the two ambient temperature ranges of high ambient temperature and non-high ambient temperature as an example, the pre-cooling stage includes a first pre-cooling stage and a second pre-cooling stage. Combining Figure 4 with the process schematic diagram, S2 includes the following steps:

[0095] A1. When the external environment temperature is greater than the first preset value (denoted as a1), enter the first pre-cooling stage, and set the new freezer shutdown point to Tt1, where Tt1 = Tds - a2;

[0096] A2. When the external environment temperature is less than or equal to the first preset value a1, enter the second pre-cooling stage, and set the new freezer shutdown point to Tt2, where Tt2 = Tds - a3;

[0097] Among them, Tds is the freezer set temperature, a2 is the first temperature adjustment value, a3 is the second temperature adjustment value, and a2 > a3 > 0.

[0098] The value range of the first preset value a1 is: 30 ≤ a1 ≤ 34, and its preferred value is 32, with the unit of °C;

[0099] The value range of the first temperature adjustment value a2 is 3 ≤ a2 ≤ 4, and the preferred optional value is 3.5, with the unit of °C;

[0100] The value range of the second temperature adjustment value a3 is 1.5 ≤ a3 ≤ 2.5, and the preferred optional value is 2, with the unit of °C.

[0101] The functions of the above two pre-cooling stages are the same, but the control rules for the pre-cooling stages are different under different ambient temperature ranges. Because the level of the external ambient temperature has different effects on the temperature rise of the compartment during defrosting of the cold storage equipment, a high ambient temperature has a greater impact on the temperature rise before and after defrosting of the compartment. Therefore, a2 > a3. In this embodiment, considering the high and low ambient temperature conditions, the control rule of the compressor is changed, and the freezer shutdown point is lowered, which can effectively reduce the temperature fluctuation of the freezer, prevent the temperature of the freezer from rising too much during defrosting, and ensure the temperature uniformity of the compartment.

[0102] Further optionally, in combination with Figure 3 the process schematic diagram of

[0103] S4, monitor the temperature of the freezer and record the operation duration of the pre-cooling stage;

[0104] S5, determine the timing to exit the pre-cooling stage according to the temperature of the freezer and the operation duration of the pre-cooling stage.

[0105] On the one hand, by monitoring whether the temperature of the freezer reaches the new freezer shutdown point to determine whether to exit the pre-cooling stage, it can ensure that the temperature of the freezer is slightly reduced and prevent the temperature of the freezer from rising too much during defrosting; on the other hand, by monitoring the operation duration of the pre-cooling stage to judge whether the pre-cooling time is too long, and thus determine the exit timing of the pre-cooling stage, it can save energy consumption.

[0106] Further optionally, in combination with Figure 4 the process schematic diagram of

[0107] S51, judge whether Td satisfies Td ≤ Tt1. If it is satisfied, execute S52; if not, execute S53;

[0108] S52, exit the first pre-cooling stage;

[0109] S53, judge whether t1 satisfies t1 ≥ b1. If it is satisfied, execute S52; if not, go to step S51;

[0110] Wherein, Td represents the temperature of the freezer, and b1 represents the first preset duration.

[0111] In this embodiment, this is a cyclic judgment. In the first pre-cooling stage, as long as one of the above two judgment conditions is satisfied, the current pre-cooling stage is exited. The value range of b1 is 50 ≤ b1 ≤ 70, and the preferred selectable value is 60, with the unit of min.

[0112] Further optionally, in combination with Figure 4Schematic diagram of the process. In the second pre-cooling stage (i.e., pre-cooling 2), record the operation duration of the pre-cooling stage as t2. S5 includes S54 to S56, where:

[0113] S54, determine whether Td satisfies Td ≤ Tt2. If it is satisfied, execute S55; if not, execute S56;

[0114] S55, exit the second pre-cooling stage;

[0115] S56, determine whether t1 satisfies t1 ≥ b2. If it is satisfied, execute S55; if not, go to step S54;

[0116] Where, Td represents the freezer temperature, and b2 represents the second preset duration.

[0117] In this embodiment, this is a loop judgment. In the second pre-cooling stage, as long as one of the above two judgment conditions is satisfied, the current pre-cooling stage is exited. The value range of b2 is 110 ≤ b2 ≤ 130, and the preferred selectable value is 120, with the unit of min.

[0118] Further optionally, the defrosting process also has a cycle pre-heating stage and a defrosting heating stage. In the cycle pre-heating stage, control the refrigerated air damper and the freezer fan to be in the on state. After the pre-cooling stage is completed, the defrosting method further includes S6 to S9, where:

[0119] S6, obtain the current temperature of the refrigerating chamber;

[0120] S7, determine whether the current temperature of the refrigerating chamber satisfies the preset condition; if it is satisfied, execute S8, if not, execute S9;

[0121] S8, enter the cycle pre-heating stage;

[0122] S9, enter the defrosting heating stage.

[0123] In this embodiment, determine the control rule of the pre-cooling stage according to the ambient temperature when the cold storage device enters the defrosting mode; after the pre-cooling stage is completed, determine whether to enter the cycle pre-heating stage according to the collected temperature of the refrigerating chamber. In this stage, by opening the refrigerated air damper and the freezer fan, the air between the refrigerating chamber, the freezer and the evaporator is circulated; on the one hand, the cold air in the freezer and the evaporator can be blown into the refrigerating chamber to reduce the temperature of the refrigerating chamber and prevent the temperature of the refrigerating chamber from rising too much after defrosting. On the other hand, the hot air (relatively) in the refrigerating chamber is circulated to the freezer and the evaporator for pre-heating defrosting in advance, which can shorten the opening time of the defrosting heater in the next stage to a certain extent, save the energy consumption of the cold storage device, and improve the stability and reliability of defrosting.

[0124] Further optionally, in combination with Figure 4Schematic diagram of the process. S7 includes the following steps:

[0125] S71. In the first pre-cooling stage, determine whether Tc satisfies Tc ≤ a4. If not, it is regarded as satisfying the preset condition;

[0126] S72. In the second pre-cooling stage, determine whether Tc satisfies Tc ≤ a7. If not, it is regarded as satisfying the preset condition;

[0127] a4 < a7.

[0128] Specifically, in the first pre-cooling stage, if it is detected that Tc ≤ a4 (the value range of a4 is -1.5 ≤ a4 < -0.5, and the preferred optional value is -1, unit: °C) holds, it indicates that the temperature in the refrigerating chamber is already relatively low, and there is no need to perform cyclic pre-heating to further reduce the temperature in the refrigerating chamber. Otherwise, it may cause the items in the refrigerating chamber to freeze. Therefore, skip the cyclic pre-heating stage and enter the defrost heating stage. On the contrary, if it is detected that Tc ≤ a4 does not hold, enter the cyclic pre-heating stage. Use the fan and air duct to circulate and convect the cold air in the freezer and evaporator with the hot air (relatively speaking) in the refrigerating chamber. On the one hand, it can slightly reduce the temperature in the refrigerating chamber to prevent the temperature in the refrigerating chamber from rising too much during defrosting. On the other hand, the hot air in the refrigerating chamber convects to the freezer and the evaporator, which can pre-heat and defrost the frost layer on the upper surface of the freezer and the evaporator;

[0129] In the second pre-cooling stage, its control principle is the same as that of the first pre-cooling stage. If it is detected that Tc ≤ a7 (the value range of a7 is -0.5 ≤ a7 < 0.5, and the preferred optional value is 0, unit: °C) holds, skip the cyclic pre-heating stage and enter the defrost heating stage.

[0130] Further optionally, combined with Figure 4 the schematic diagram of the process, the cyclic pre-heating stage includes the first cyclic pre-heating stage (i.e., cyclic pre-heating stage 1) and the second cyclic pre-heating stage (i.e., cyclic pre-heating stage 2). In the first pre-cooling stage, after determining that it is necessary to enter the cyclic pre-heating stage, the defrosting method includes S81 - S84, where:

[0131] S81. Obtain the set temperature Tcs of the refrigerating chamber;

[0132] S82. Determine whether Tcs satisfies Tcs < a8. If it satisfies, execute S83; if not, execute S84;

[0133] S83. Enter the first cyclic pre-heating stage;

[0134] S84. Enter the second cyclic pre-heating stage;

[0135] The operating duration of the first cycle preheating stage is less than that of the second cycle preheating stage. a8 represents the fourth preset value, and its preferred value is 5°C.

[0136] The functions of the first and second cycle preheating are the same. They both use the fan and air duct to circulate and convect the cold air in the freezer and evaporator with the hot air in the refrigerator compartment (relatively speaking). One function is to slightly reduce the temperature of the refrigerator compartment to prevent the temperature in the refrigerator compartment from rising too much during defrosting. Another function is that the hot air in the refrigerator compartment convects to the freezer and the evaporator, which can preheat and defrost the frost layer on the upper surface of the freezer and the evaporator, shorten the defrosting time to a certain extent, and save a certain amount of energy. It's just that the operating control rules are different under different set temperature conditions of the refrigerator compartment.

[0137] Further optionally, in combination with Figure 4 the process schematic diagram of, in the first cycle preheating stage, the defrosting method further includes S831 to S833, where:

[0138] S831, determine the refrigerator compartment shutdown point Tt3 corresponding to the set temperature Tcs of the refrigerator compartment;

[0139] S832, monitor the temperature Tc of the refrigerator compartment and record the cycle preheating duration t3;

[0140] S833, if it is detected that Tc ≤ Tt3 - a3 or t3 ≥ b3, exit the first cycle preheating stage;

[0141] a3 represents the third temperature adjustment value. In this embodiment, its preferred value is 1 (°C), and b3 represents the third preset duration.

[0142] Specifically, in combination with Figure 4 , if it is detected that Tcs < 5 holds, then enter cycle preheating stage 1, start timing and record it as t3, and continuously collect the temperature Tc of the refrigerator compartment temperature sensor. The control in this stage is that the refrigeration air damper and the freezer fan are in the on state, and other devices and loads are in the off state; during the execution of this stage control process, detect whether Tc satisfies Tc ≤ Tt3 - 1 and detect whether t3 satisfies t3 ≥ b3. If it is detected that Tc ≤ Tt3 - 1 or t3 ≥ b3 (the value range of b3 is 2 ≤ b3 ≤ 4, and the preferred optional value is 3, unit is min) holds, then exit this cycle preheating stage.

[0143] Further optionally, in the second cycle preheating stage, the defrosting method further includes S841 to S843, where:

[0144] S841, determine the refrigerator compartment shutdown point Tt3 corresponding to the set temperature Tcs of the refrigerator compartment;

[0145] S842. Monitor the temperature Tc of the refrigerating chamber and record the duration t4 of the cyclic preheating.

[0146] S843. If it is detected that Tc ≤ Tt3 - a4 or t4 ≥ b4, exit the second cyclic preheating stage, where 0 < c1 < c2 and b3 < b4.

[0147] a4 represents the fourth temperature adjustment value, and in this embodiment, its preferred value is 2 (°C). b4 represents the fourth preset duration, where 0 < a3 < a4 and b3 < b4.

[0148] Specifically, in combination with Figure 4 , if it is detected that Tcs < 5 does not hold, enter the cyclic preheating stage 2, start timing denoted as t4, and continuously collect the temperature Tc of the temperature sensor in the refrigerating chamber. During this stage, the control is such that the refrigerating air damper and the freezing fan are in the on state, and other devices and loads are in the off state. During the execution of the control process of this stage, detect whether Tc satisfies Tc ≤ Tt3 - 2 and whether t4 satisfies t4 ≥ b4. If it is detected that Tc ≤ Tt3 - 2 or t4 ≥ b4 (the value range of b4 is 5 ≤ b4 ≤ 7, and the preferred optional value is 6, with the unit of min) holds, then exit this cyclic preheating stage.

[0149] Further optionally, the cyclic preheating stage further includes a third cyclic preheating stage and a fourth cyclic preheating stage. In the second precooling stage, after determining that it is necessary to enter the cyclic preheating stage, the defrosting method includes S85 - S88, where:

[0150] S85. Obtain the set temperature Tcs of the refrigerating chamber.

[0151] S86. Determine whether Tcs satisfies Tcs < a8. If it satisfies, execute S87; if it does not satisfy, execute S88.

[0152] S87. Enter the third cyclic preheating stage.

[0153] S88. Enter the fourth cyclic preheating stage.

[0154] The operating duration of the third cyclic preheating stage is less than that of the fourth cyclic preheating stage. a8 represents the fourth preset value, and its preferred value is 5 °C.

[0155] The functions of the third and fourth cycle pre-heating are the same. They both use the fan and air duct to circulate and convect the cold air in the freezer and evaporator with the hot air in the refrigerator compartment (relatively speaking). One function is to slightly reduce the temperature of the refrigerator compartment to prevent the temperature in the refrigerator compartment from rising too much during defrosting. Another function is that the hot air in the refrigerator compartment convects to the freezer and the evaporator, which can pre-heat and defrost the frost layer on the upper surface of the freezer and the evaporator, shorten the defrosting time to a certain extent, and save a certain amount of energy. It's just that the operating control rules are different under different set temperature conditions of the refrigerator compartment.

[0156] Further optionally, in the third cycle pre-heating stage, the defrosting method further includes S871 to S873, where:

[0157] S871, determine the refrigerator compartment shutdown point Tt5 corresponding to the set temperature Tcs of the refrigerator compartment;

[0158] S872, monitor the temperature Tc of the refrigerator compartment and record the cycle pre-heating duration t4;

[0159] S873, if it is detected that Tc ≤ Tt4 - a5 or t5 ≥ b5, exit the third cycle pre-heating stage;

[0160] a5 represents the fifth temperature adjustment value. In this embodiment, its preferred value is 0.5 (°C), and b5 represents the fifth preset duration.

[0161] Specifically, if it is detected that Tcs < 5 holds, then enter the cycle pre-heating stage 3, start timing and record it as t5, and continuously collect the temperature Tc of the refrigerator compartment temperature sensor. The control in this stage is that the refrigeration air damper and the freezer fan are in the on state, and other devices and loads are in the off state; during the execution of the control process in this stage, detect whether Tc satisfies Tc ≤ Tt3 - 0.5 and detect whether t5 satisfies t5 ≥ b5. If it is detected that Tc ≤ Tt4 - 0.5 or t5 ≥ b5 (the value range of b5 is 1 ≤ b5 ≤ 3, and the preferred optional value is 2, unit is min) holds, then exit this cycle pre-heating stage.

[0162] Further optionally, in the fourth cycle pre-heating stage, the defrosting method further includes S881 to S883, where:

[0163] S881, determine the refrigerator compartment shutdown point Tt4 corresponding to the set temperature Tcs of the refrigerator compartment;

[0164] S882, monitor the temperature Tc of the refrigerator compartment and record the cycle pre-heating duration t6;

[0165] S883, if it is detected that Tc ≤ Tt3 - a6 or t6 ≥ b6, exit the fourth cycle pre-heating stage, c3 < c4, b5 < b6;

[0166] a6 represents the sixth temperature adjustment value, and in this embodiment, its preferred value is 1.5 (°C). b6 represents the sixth preset duration; 0 < a5 < a6, b5 < b6.

[0167] Specifically, if it is detected that Tcs < 5 does not hold, then enter the cyclic preheating stage 4, start timing denoted as t6, and continuously collect the temperature Tc of the refrigerating chamber temperature sensor. During this stage, the control is that the refrigerating air damper and the freezing fan are in the on state, and other devices and loads are in the off state; during the execution of the control process of this stage, detect whether Tc satisfies Tc ≤ Tt3 - 1.5 and detect whether t6 satisfies t6 ≥ b6. If it is detected that Tc ≤ Tt4 - 1.5 or t6 ≥ b6 (the value range of b6 is 4 ≤ b6 ≤ 6, and the preferred optional value is 5, with the unit of min) holds, then exit this cyclic preheating stage.

[0168] Exit the cyclic preheating stage.

[0169] Enter the defrosting heating stage, turn on the defrosting heater, and turn off other devices.

[0170] After the defrosting heating ends, exit the defrosting mode and enter the next normal refrigeration cycle.

[0171] In the second aspect of the embodiments of the present invention, there is provided a defrosting device for a cold storage device, which includes one or more processors and a non - transitory computer - readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the method of any one of the first - aspect embodiments.

[0172] In the third aspect of the embodiments of the present invention, there is provided a cold storage device, which adopts the method of any one of the first - aspect embodiments or includes the device of the second - aspect embodiments.

[0173] The cold storage device, defrosting method, and defrosting device of this embodiment first determine the control rules for the pre-cooling stage according to the ambient temperature when the cold storage device enters the defrosting mode. High ambient temperature has a greater impact on the temperature rise of the compartment before and after defrosting. After the pre-cooling stage is completed, it is determined whether to enter the cyclic pre-heating stage based on the temperature sensor of the refrigerating chamber collected. This stage is based on the ambient temperature, the actual temperature of the refrigerating chamber, and the set temperature of the refrigerating chamber corresponding to the operation rules of the cyclic pre-heating stage, which can effectively reduce the temperature fluctuation of the refrigerating chamber, prevent a large temperature rise in the refrigerating chamber after defrosting, and ensure the temperature uniformity of the compartment. In addition, by opening the refrigerating air damper and the freezing fan, the air between the refrigerating chamber, the freezing chamber, and the evaporator can be circulated. On the one hand, the cold air in the freezing chamber and the evaporator can be blown into the refrigerating chamber to lower the temperature of the refrigerating chamber and prevent a large temperature rise after defrosting. On the other hand, the hot air (relatively) in the refrigerating chamber can be circulated to the freezing chamber and the evaporator for pre-heating defrosting in advance, which can shorten the opening time of the defrosting heater in the next stage to a certain extent, save the energy consumption of the cold storage device, and improve the stability and reliability of defrosting.

[0174] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0175] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disc, etc., including several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0176] The above are only the preferred embodiments of the present invention, and there is no limitation to the present invention in any form. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the technical content prompted above to form equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A defrosting method for a cold storage device, characterized in that, The defrosting mode of the cold storage device is provided with a pre-cooling stage for reducing the freezing chamber shutdown point. The defrosting method includes: When the cold storage device enters the defrosting mode, first control the cold storage device to enter the pre-cooling stage; In the pre-cooling stage, determine the control rule of the pre-cooling stage according to the external environmental temperature, and determine the new freezing chamber shutdown point according to the control rule; Control the cold storage device to defrost and operate according to the new freezing chamber shutdown point; Among them, determining the control rule of the pre-cooling stage according to the external environmental temperature and determining the new freezing chamber shutdown point according to the control rule includes: Judge the ambient temperature range where the external environmental temperature is located, and enter different pre-cooling stages according to different ambient temperature ranges and determine the corresponding temperature adjustment values; in different pre-cooling stages, determine the corresponding new freezing chamber shutdown points according to the corresponding temperature adjustment values and the freezing chamber set temperature; Among them, the pre-cooling stage includes a first pre-cooling stage and a second pre-cooling stage. Judging the ambient temperature range where the external environmental temperature is located, entering different pre-cooling stages according to different ambient temperature ranges and determining the corresponding temperature adjustment values; in different pre-cooling stages, determining the corresponding new freezing chamber shutdown points according to the corresponding temperature adjustment values and the freezing chamber set temperature includes: When the external environmental temperature is greater than the first preset value, enter the first pre-cooling stage, and set the new freezing chamber shutdown point to Tt1, Tt1 = Tds - a2; When the external environmental temperature is less than or equal to the first preset value, enter the second pre-cooling stage, and set the new freezing chamber shutdown point to Tt2, Tt2 = Tds - a3; Among them, Tds is the freezing chamber set temperature, a2 is the first temperature adjustment value, a3 is the second temperature adjustment value, and a2 > a3 > 0.

2. The defrosting method according to claim 1, wherein In the pre-cooling stage, the defrosting method further includes: Monitor the freezing chamber temperature and record the operation duration of the pre-cooling stage; Judge the timing of exiting the pre-cooling stage according to the freezing chamber temperature and the operation duration of the pre-cooling stage.

3. The defrosting method according to claim 2, wherein In the first pre-cooling stage, record the operation duration of the pre-cooling stage as t1. Judging the timing of exiting the pre-cooling stage according to the freezing chamber temperature and the operation duration of the pre-cooling stage includes: Judge whether Td satisfies Td ≤ Tt1. If it satisfies, exit the first pre-cooling stage; if it does not satisfy, Judge whether t1 satisfies t1 ≥ b1. If it satisfies, exit the first pre-cooling stage; if it does not satisfy, Go to the step of judging whether Td satisfies Td ≤ Tt1; Among them, Td represents the freezing chamber temperature, and b1 represents the first preset duration.

4. The defrosting method according to claim 2, characterized in that, In the second pre-cooling stage, record the operation duration of the pre-cooling stage as t2. Judging the timing of exiting the pre-cooling stage according to the freezing chamber temperature and the operation duration of the pre-cooling stage includes: Judge whether Td satisfies Td ≤ Tt2. If it satisfies, exit the second pre-cooling stage; if it does not satisfy, Judge whether t1 satisfies t1 ≥ b2. If it satisfies, exit the second pre-cooling stage; if it does not satisfy, Go to the step of judging whether Td satisfies Td ≤ Tt1; Wherein, Td represents the freezer compartment temperature, and b2 represents the second preset duration.

5. The defrosting method according to any one of claims 1-4, characterized in that, The defrosting process further includes a cyclic preheating stage and a defrosting heating stage. During the cyclic preheating stage, the refrigerating air damper and the freezer fan are controlled to be in the on state. After the pre-cooling stage is completed, the defrosting method further includes: Obtaining the current refrigerating compartment temperature Tc; Judging whether the current refrigerating compartment temperature Tc meets a preset condition; If it meets the condition, entering the cyclic preheating stage; If it does not meet the condition, entering the defrosting heating stage.

6. The defrosting method according to claim 5, wherein, The judging whether the current refrigerating compartment temperature Tc meets the preset condition includes: During the first pre-cooling stage, judging whether Tc meets Tc ≤ a4. If it does not meet the condition, it is regarded as meeting the preset condition; During the second pre-cooling stage, judging whether Tc meets Tc ≤ a7. If it does not meet the condition, it is regarded as meeting the preset condition; Wherein, a4 represents the second preset value, a7 represents the third preset value, and a4 < a7.

7. The defrosting method according to claim 5, characterized in that The cyclic preheating stage includes a first cyclic preheating stage and a second cyclic preheating stage. During the first pre-cooling stage, the defrosting method further includes: Obtaining the set temperature Tcs of the refrigerating compartment; Judging whether Tcs meets Tcs < a8. If it meets the condition, entering the first cyclic preheating stage; If it does not meet the condition, entering the second cyclic preheating stage; Wherein, the operation duration of the first cyclic preheating stage is less than that of the second cyclic preheating stage, and a8 represents the fourth preset value.

8. The defrosting method according to claim 7, wherein During the first cyclic preheating stage, the defrosting method further includes: Determining the refrigerating compartment shutdown point Tt3 corresponding to the set temperature Tcs of the refrigerating compartment; Monitoring the refrigerating compartment temperature Tc and recording the cyclic preheating duration t3; If it is detected that Tc ≤ Tt3 - a3 or t3 ≥ b3, exiting the first cyclic preheating stage; a3 represents the third temperature adjustment value, and b3 represents the third preset duration.

9. The defrosting method according to claim 7, wherein During the second cyclic preheating stage, the defrosting method further includes: Determining the refrigerating compartment shutdown point Tt3 corresponding to the set temperature Tcs of the refrigerating compartment; Monitoring the refrigerating compartment temperature Tc and recording the cyclic preheating duration t4; If it is detected that Tc ≤ Tt3 - a4 or t4 ≥ b4, exiting the second cyclic preheating stage; a4 represents the fourth temperature adjustment value, and b4 represents the fourth preset duration.

10. The defrosting method according to claim 5, characterized in that, The cyclic preheating stage further includes a third cyclic preheating stage and a fourth cyclic preheating stage. During the second pre-cooling stage, the defrosting method further includes: Obtaining the set temperature Tcs of the refrigerating compartment; Judging whether Tcs meets Tcs < a8. If it meets the condition, entering the third cyclic preheating stage; If it does not meet the condition, entering the fourth cyclic preheating stage; Wherein, the operation duration of the third cyclic preheating stage is less than that of the fourth cyclic preheating stage, and a8 represents the fourth preset value.

11. The defrosting method according to claim 10, characterized in that, During the third cyclic preheating stage, the defrosting method further includes: Determining the refrigerating compartment shutdown point Tt5 corresponding to the set temperature Tcs of the refrigerating compartment; Monitoring the refrigerating compartment temperature Tc and recording the cyclic preheating duration t4; If it is detected that Tc ≤ Tt4 - a5 or t5 ≥ b5, exiting the third cyclic preheating stage; a5 represents the fifth temperature adjustment value, and b5 represents the fifth preset duration.

12. The defrosting method according to claim 10, wherein In the fourth cycle preheating stage, the defrosting method further includes: determining a refrigerator compartment shutdown point Tt4 corresponding to the set temperature Tcs of the refrigerator compartment; monitoring the temperature Tc of the refrigerator compartment and recording the cycle preheating duration t6; if it is detected that Tc ≤ Tt3 - a6 or t6 ≥ b6, exiting the fourth cycle preheating stage, where c3 < c4 and b5 < b6; a6 represents the sixth temperature adjustment value, and b6 represents the sixth preset duration.

13. A defrosting device for a cold storage device, characterized in that, It includes one or more processors and a non-transitory computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are configured to implement the defrosting method according to any one of claims 1-12.

14. A cold storage device, characterized in that, It employs the defrosting method according to any one of claims 1-12, or includes the defrosting device according to claim 13.

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