CN115615129A

CN115615129A - Defrosting method and device of cold storage equipment and cold storage equipment

Info

Publication number: CN115615129A
Application number: CN202211171158.6A
Authority: CN
Inventors: 胡新童; 周月飞; 包旭峰; 潘亮
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-01-17

Abstract

The invention provides a defrosting method and a defrosting device of cold storage equipment and the cold storage equipment. The defrosting mode of the cold storage equipment is provided with a pre-cooling stage, the pre-cooling stage is used for reducing the stop point of the freezing chamber, and the defrosting method comprises the following steps: when the cold storage equipment enters a defrosting mode, firstly controlling the cold storage equipment to enter a precooling stage; in the precooling stage, determining a control rule of the precooling stage according to the external environment temperature, and determining a stop point of a new freezing chamber according to the control rule; and controlling the defrosting operation of the cold storage equipment according to the stop point of the new freezing chamber. Through the defrosting method of the embodiment, the control rule of the compressor can be changed, the stop point of the freezing chamber is reduced, the temperature of the freezing chamber is slightly reduced, and the temperature of the freezing chamber is prevented from being increased more during defrosting.

Description

Defrosting method and device of cold storage equipment and cold storage equipment

Technical Field

The invention belongs to the field of cold storage equipment, and particularly relates to a defrosting method and a defrosting device of the cold storage equipment and the cold storage equipment.

Background

In the process of developing new refrigerator products, the 3K temperature is an important index for judging whether certain refrigerator performance tests are qualified or not, in particular to a storage temperature test and a freezing capacity test in the national standard GBT 8059-2016 household and similar purpose refrigerating appliances. The 3K is the difference between the highest temperature reached by the compartment in defrosting and recovery periods and the highest temperature in a stable refrigerating stage before defrosting, and both a storage temperature test and a freezing capacity test in the national standard need to meet the requirement of less than 3K. In actual new product development testing, these two experiments often show problems of over 3K, especially during the high loop temperature phase. When the refrigerator is in a defrosting and recovery period, the compartment stops refrigerating, and the temperature of the compartment rapidly rises to exceed 3K in the period due to the influence of external high-environment temperature and heat generated during defrosting and heating of the refrigerator body, so that the problem frequently occurs in the development process of new products in the industry. The problem is generally solved from two aspects, namely, on one hand, the key structure and key devices are adjusted from the aspect of the system, and as the aspect of the refrigerator system is already established in the early development, the cost is high and experimental resources are wasted from the aspect of the refrigerator system; one aspect is to adjust the defrosting rules of the refrigerator to solve this problem.

The related art controls the refrigerator to enter a preset refrigeration mode before defrosting the refrigerator, but does not consider a specific high ambient temperature stage, the defrosting condition of the stage has a great influence on the temperature rise of the compartment, and the lowering of the shutdown point of the refrigerating chamber in the refrigeration stage before defrosting heating can cause the refrigerating chamber to be at an excessively low temperature to cause the articles in the refrigerating chamber to be frozen.

In addition, in the related art, before defrosting the refrigerator, the refrigerator is controlled to enter a pre-cooling stage, the pre-cooling stage is a fixed control rule, the influence of defrosting at a high ambient temperature on compartment temperature rise is not considered, meanwhile, a set gear of a refrigerating chamber is not considered in the air inlet and return defrosting stage, and if the set temperature of the refrigerating chamber is higher, the temperature of the refrigerating chamber is possibly reduced after air return defrosting, so that the temperature uniformity of the compartment is influenced.

Disclosure of Invention

In view of this, the invention discloses a defrosting method and a defrosting device for a cold storage device and the cold storage device, which are used for solving the problem of large temperature fluctuation of a defrosting time chamber of the cold storage device.

In order to solve the technical problem, a first aspect of the present invention provides a defrosting method for a cold storage device, where a defrosting mode of the cold storage device is provided with a pre-cooling stage, and the pre-cooling stage is used to reduce a stop point of a freezing chamber, and the defrosting method includes:

when the cold storage equipment enters a defrosting mode, firstly controlling the cold storage equipment to enter a precooling stage;

in the precooling stage, determining a control rule of the precooling stage according to the external environment temperature, and determining a stop point of a new freezing chamber according to the control rule;

and controlling the defrosting operation of the cold storage equipment according to the stop point of the new freezing chamber.

Further optionally, determining a control rule of the pre-cooling stage according to the external environment temperature, and determining a stop point of the new freezing chamber according to the control rule, includes:

judging the environment temperature range of the external environment temperature, entering different precooling stages according to different environment temperature ranges and determining corresponding temperature adjustment values; and in different precooling stages, determining a corresponding stop point of the new freezing chamber according to the corresponding temperature adjustment value and the set temperature of the freezing chamber.

Further optionally, the pre-cooling stage comprises a first pre-cooling stage and a second pre-cooling stage, the environment temperature range of the external environment temperature is judged, different pre-cooling stages are entered according to different environment temperature ranges, and corresponding temperature adjustment values are determined; in different precooling stages, determining a corresponding stop point of a new freezing chamber according to a corresponding temperature adjusting value and a freezing chamber set temperature, wherein the stop point comprises the following steps:

when the external environment temperature is greater than a first preset value, entering a first precooling stage, and setting a stop point of a new freezing chamber as Tt1, wherein Tt1= Tds-a2;

when the outside environment temperature is smaller than or equal to a first preset value, entering a second precooling stage, and setting a stop point of a new freezing chamber as Tt2, wherein Tt2= Tds-a3;

wherein Tds is the set temperature of the freezing chamber, a2 is a first temperature adjustment value, a3 is a second temperature adjustment value, and a2 > a3 > 0.

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

monitoring the temperature of the freezing chamber, and recording the operation duration of the precooling stage;

and judging the time for exiting the precooling stage according to the temperature of the freezing chamber and the running time of the precooling stage.

Further optionally, in the first precooling stage, recording the operation duration of the precooling stage as t1, and determining the timing for exiting the precooling stage according to the temperature of the freezing chamber and the operation duration of the precooling stage, including:

judging whether Td meets Td or not and exiting the first precooling stage if the Td meets Tt 1; if the content is not satisfied,

judging whether t1 satisfies that t1 is more than or equal to b1, if yes, exiting the first precooling stage, if not,

turning to the step of judging whether Td is less than or equal to Tt 1;

where Td represents the freezer temperature and b1 represents the first predetermined period of time.

Further optionally, in the second pre-cooling stage, recording the operation duration of the pre-cooling stage as t2, and determining the time for exiting the pre-cooling stage according to the temperature of the freezer and the operation duration of the pre-cooling stage, including:

judging whether Td is equal to or less than Tt2, and if yes, exiting the second precooling stage; if the content of the active carbon is not satisfied,

judging whether t1 is more than or equal to b2, if yes, exiting the second precooling stage, if not,

turning to the step of judging whether Td is less than or equal to Tt 1;

where Td represents the freezer temperature and b2 represents the second predetermined period of time.

Further optionally, the defrosting process further includes a cycle preheating stage and a defrosting heating stage, the cycle preheating stage controls the refrigeration air door and the freezing fan to be in an open state, and after the precooling stage is executed, the defrosting method further includes:

acquiring the current refrigerating chamber temperature Tc;

judging whether the current refrigerating chamber temperature Tc meets a preset condition or not;

if yes, entering a circulating preheating stage;

if not, entering a defrosting heating stage.

Further optionally, the determining whether the current refrigerating chamber temperature Tc meets the preset condition includes:

in the first precooling stage, judging whether Tc meets Tc which is not more than a4, if not, determining that the Tc meets a preset condition;

in the second precooling stage, judging whether Tc meets Tc < a7, if not, determining that the Tc meets a preset condition;

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

Further optionally, the cyclic preheating stage includes a first cyclic preheating stage and a second cyclic preheating stage, and in the first precooling stage, the defrosting method includes:

acquiring a set temperature Tcs of a refrigerating chamber;

judging whether the Tcs meets the condition that the Tcs is less than a8, and if so, entering a first cycle preheating stage;

if not, entering a second circulation preheating stage;

the operating duration of the first cyclic preheating phase is less than the operating duration of the second cyclic preheating phase, and a8 represents a fourth preset value.

Further optionally, in the first cycle preheating stage, the defrosting method further comprises:

determining a refrigerating chamber stop point Tt3 corresponding to the set refrigerating chamber temperature Tcs;

monitoring the temperature Tc of the refrigerating chamber and recording the cyclic preheating time t3;

if Tc is less than or equal to Tt3-a3 or t3 is more than or equal to b3, the first cycle preheating stage is exited;

a3 represents a third temperature adjustment value, and b3 represents a third preset time period.

Further optionally, in the second cycle preheating stage, the defrosting method further comprises:

monitoring the temperature Tc of the refrigerating chamber and recording the cyclic preheating time t4;

if the Tc is not more than Tt3-a4 or t4 is not less than b4, the second circulation preheating stage is exited;

a4 represents a fourth temperature adjustment value, and b4 represents a fourth preset time period.

Further optionally, the cyclic preheating stage further includes a third cyclic preheating stage and a fourth cyclic preheating stage, and in the second precooling stage, the defrosting method includes:

acquiring a set temperature Tcs of a refrigerating chamber;

judging whether the Tcs meets the condition that the Tcs is less than a8, and if so, entering a third cycle preheating stage;

if not, entering a fourth cycle preheating stage;

the operating duration of the third cyclic preheating phase is less than the operating duration of the fourth cyclic preheating phase, and a8 represents a fourth preset value.

Further optionally, in the third cycle preheating stage, the defrosting method further comprises:

determining a refrigerating chamber stop point Tt5 corresponding to the refrigerating chamber set temperature Tcs;

monitoring the temperature Tc of the refrigerating chamber, and recording the cyclic preheating time t4;

if the Tc is not more than Tt4-a5 or t5 is not less than b5, the third cycle preheating stage is exited;

a5 represents a fifth temperature adjustment value, and b5 represents a fifth preset time period.

Further optionally, in the fourth cycle preheating stage, the defrosting method further comprises:

determining a refrigerating chamber stop point Tt4 corresponding to the refrigerating chamber set temperature Tcs;

monitoring the temperature Tc of the refrigerating chamber and recording the cyclic preheating time t6;

if Tc is less than or equal to Tt3-a6 or t6 is more than or equal to b6, the fourth cycle preheating stage is exited, c3 is more than c4, and b5 is more than b6;

a6 represents a sixth temperature adjustment value, and b6 represents a sixth preset time period.

A second aspect of the invention provides a defrosting apparatus for a cold storage device comprising one or more processors and a non-transitory computer readable storage medium having stored thereon program instructions, the one or more processors being configured to implement the method according to any one of the first aspect when the program instructions are executed by the one or more processors.

A third aspect of the invention provides a cold storage apparatus, which employs the method of any one of the first aspects, or which comprises the apparatus of the second aspect.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

the control rule of the precooling stage is determined according to the ambient temperature of the cold storage equipment entering the defrosting period, the stop point of the freezing chamber is reduced, and the temperature of the freezing chamber is prevented from rising back more during defrosting; after the pre-cooling stage is executed, determining a cyclic pre-heating stage according to the collected temperature sensor of the refrigerating chamber, wherein the air among the refrigerating chamber, the freezing chamber and the evaporator is circulated by opening a refrigerating air door and a freezing fan at the stage; on the one hand, cold air of the freezing chamber and the evaporator can be blown into the refrigerating chamber, the temperature of the refrigerating chamber is reduced, the temperature rise after defrosting is prevented to be large, on the other hand, hot air (relative) of the refrigerating chamber circulates to the freezing chamber and the evaporator, defrosting is preheated in advance, the starting time of a next-stage defrosting heater can be shortened to a certain extent, energy consumption of cold storage equipment is saved, and the stability and reliability of defrosting are improved.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic flow chart of a defrosting method of a cold storage facility according to an embodiment of the present invention.

Fig. 2 is a second schematic flow chart of a defrosting method for a cold storage device according to an embodiment of the present invention.

Fig. 3 is a third schematic flow chart of a defrosting method of a cold storage device according to an embodiment of the invention.

Fig. 4 is a fourth flowchart illustrating a defrosting method of a cold storage device according to an embodiment of the invention.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it for those skilled in the art by reference to specific embodiments.

Detailed Description

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to solve the problem of large temperature fluctuation of a defrosting time chamber of cold storage equipment, the embodiment of the first aspect of the invention provides a defrosting method of the cold storage equipment, the cold storage equipment is preferably a refrigerator, a defrosting mode of the cold storage equipment is provided with a pre-cooling stage, and the pre-cooling stage is used for reducing the stop point of a freezing chamber.

The following describes a defrosting method of the cold storage facility according to this embodiment with reference to the accompanying drawings.

With reference to the schematic flow chart of fig. 1, the defrosting method includes S1 to S3, where:

s1, when cold storage equipment enters a defrosting mode, firstly, controlling the cold storage equipment to enter a precooling stage;

s2, in a precooling stage, determining a control rule of the precooling stage according to the external environment temperature, and determining a stop point of the new freezing chamber according to the control rule;

and S3, controlling the defrosting operation of the cold storage equipment according to the stop point of the new freezing chamber.

Generally, a defrosting heater is arranged below a freezing evaporator, the temperature of a freezing chamber is greatly influenced during defrosting, and meanwhile, the high ambient temperature has a large influence on the temperature rise before and after defrosting of the chamber, so in the embodiment, the control rule of a compressor is changed according to the external environment temperature when a refrigerator enters a defrosting mode, the stop point of the freezing chamber is reduced, the temperature of the freezing chamber can be slightly reduced, the temperature fluctuation of the freezing chamber is reduced, the temperature of the freezing chamber is prevented from being increased more during defrosting, and the temperature uniformity of the chamber is ensured.

Further optionally, with reference to the flowchart of fig. 2, S2 includes S21 to S23, where:

s21, judging a ring temperature range in which the external environment temperature is;

considering that the high ring temperature has a great influence on the temperature rise before and after defrosting of the compartment, the ring temperature zone is generally divided into two conditions, namely, the high ring temperature and the non-high ring temperature, but not limited to the two conditions;

s22, entering different precooling stages according to different environment temperature intervals and determining corresponding temperature adjustment values;

and S23, determining a corresponding stop point of the new freezing chamber according to the corresponding temperature adjustment value and the set temperature of the freezing chamber in different precooling stages.

Specifically, different precooling stage control rules are set in different environment temperature ranges, so that different stop points of a new freezing chamber are determined, refrigeration control and defrosting control of the compressor are optimized, and the influence of the ambient environment temperature on temperature rise of the refrigerator during defrosting is reduced.

Further optionally, taking the two 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, and with reference to the flowchart of fig. 4, S2 includes the following steps:

a1, when the external environment temperature is greater than a first preset value (represented by A1), entering a first precooling stage, and setting a new freezing chamber stop point as Tt1, wherein Tt1= Tds-a2;

a2, when the external environment temperature is less than or equal to a first preset value a1, entering a second precooling stage, and setting a stop point of a new freezing chamber as Tt2, wherein Tt2= Tds-a3;

wherein, tds is the set temperature of the freezing chamber, a2 is a first temperature adjusting value, a3 is a second temperature adjusting value, and a2 is more than a3 and more than 0.

The value range of the first preset value a1 is as follows: a1 is more than or equal to 30 and less than or equal to 34, the preferred value is 32, and the unit is;

the value range of the first temperature adjustment value a2 is more than or equal to 3 and less than or equal to 4, and the preferred optional value is 3.5, and the unit is;

the value range of the second temperature adjustment value a3 is more than or equal to 1.5 and less than or equal to 2.5, and the preferred optional value is 2, and the unit is ℃.

The two precooling stages have the same function, but the control rules of the precooling stages in different environmental temperature ranges are different, because the external environmental temperature has different influences on the temperature rise of the compartment during defrosting of the cold storage equipment, and the high environmental temperature has larger influence on the temperature rise before and after the compartment defrosting, so a2 is more than a3. The embodiment combines the conditions of high and low ring temperatures, changes the control rule of the compressor, reduces the stop point of the freezing chamber, can effectively reduce the temperature fluctuation of the freezing chamber, prevents the temperature of the freezing chamber from rising more during defrosting, and ensures the temperature uniformity of the freezing chamber.

Further optionally, with reference to the flow chart of fig. 3, in the pre-cooling stage, the defrosting method further includes S4 to S5, where:

s4, monitoring the temperature of the freezing chamber, and recording the operation duration of the precooling stage;

and S5, judging the time for exiting the precooling stage according to the temperature of the freezing chamber and the running time of the precooling stage.

On one hand, whether the temperature of the freezing chamber reaches the stop point of a new freezing chamber is monitored, so that whether the pre-cooling stage is exited or not is judged, the temperature of the freezing chamber can be slightly reduced, and the temperature of the freezing chamber is prevented from being increased more during defrosting; on the other hand, whether the pre-cooling time is too long is judged by monitoring the running time of the pre-cooling stage, so that the quitting time of the pre-cooling stage is judged, and energy consumption can be saved.

Further optionally, with reference to the flowchart of fig. 4, in a first precooling stage (namely precooling 1), the operation duration of the precooling stage is recorded as t1, and S5 includes S51 to S55, where:

s51, judging whether Td is equal to or less than Tt1 or not, and if yes, executing S52; if not, executing S53;

s52, exiting the first precooling stage;

s53, judging whether t1 meets the condition that t1 is more than or equal to b1, if yes, executing S52, and if not, turning to the step S51;

In this embodiment, it is a loop judgment, and in the first pre-cooling stage, as long as it is monitored that one of the two judgment conditions satisfies the condition, the current pre-cooling stage is exited. The value range of b1 is more than or equal to 50 and less than or equal to 70, and the preferred selectable value is 60, and the unit is min.

Further optionally, with reference to the flowchart of fig. 4, in a second precooling stage (namely precooling 2), the operation duration of the precooling stage is recorded as t2, and S5 includes S54 to S56, where:

s54, judging whether Td is equal to or less than Tt2 or not, and if yes, executing S55; if not, executing S56;

s55, exiting the second precooling stage;

s56, judging whether t1 meets the condition that t1 is more than or equal to b2, if so, executing S55, and if not, turning to the step S54;

In this embodiment, it is a loop judgment, and in the second pre-cooling stage, as long as it is monitored that one of the two judgment conditions satisfies the condition, the current pre-cooling stage is exited. The value range of b2 is 110-130, the preferred value is 120, and the unit is min.

Further optionally, the defrosting process further includes a cycle preheating stage and a defrosting heating stage, the refrigeration damper and the freezing fan are controlled to be in an open state in the cycle preheating stage, and after the precooling stage is executed, the defrosting method further includes S6 to S9, where:

s6, acquiring the current temperature of the refrigerating chamber;

s7, judging whether the current temperature of the refrigerating chamber meets a preset condition or not; if yes, executing S8, and if not, executing S9;

s8, entering a cyclic preheating stage;

and S9, entering a defrosting heating stage.

In this embodiment, a control rule of a pre-cooling stage is determined according to an ambient temperature when the cold storage device enters a defrosting mode; and after the pre-cooling stage is executed, judging whether to enter a circulating pre-heating stage according to the collected temperature of the refrigerating chamber. In the stage, the air among the refrigerating chamber, the freezing chamber and the evaporator is circulated by opening the refrigerating air door and the freezing fan; on the one hand, cold air of the freezing chamber and the evaporator can be blown into the refrigerating chamber, the temperature of the refrigerating chamber is reduced, the temperature rise of the refrigerating chamber is large after defrosting is prevented, on the other hand, hot air (relative) of the refrigerating chamber circulates to the freezing chamber and the evaporator, defrosting is preheated in advance, the starting time of a next-stage defrosting heater can be shortened to a certain extent, energy consumption of cold storage equipment is saved, and the stability and reliability of defrosting are improved.

Further optionally, with reference to the flowchart of fig. 4, S7 includes the following steps:

s71, in the first precooling stage, judging whether Tc meets Tc which is not more than a4, if not, determining that the Tc meets a preset condition;

s72, in the second precooling stage, judging whether Tc meets Tc ≤ a7, and if not, determining that the Tc meets a preset condition;

a4＜a7。

specifically, in the first pre-cooling stage, if Tc ≦ a4 (a 4 ranges from-1.5 ≦ a4 ≦ 0.5, and a4 is preferably selected as-1, and the unit is ° c) is detected, it is determined that the temperature of the refrigerating compartment is already low, and it is not necessary to perform the cyclic pre-heating to further lower the temperature of the refrigerating compartment, and if the temperature is lowered again, the articles in the refrigerating compartment may be frozen, so the cyclic pre-heating stage is skipped, and the defrosting heating stage is performed. On the other hand, if the condition that the a4 is not more than Tc is detected, entering a cyclic preheating stage, and performing cyclic convection on cold air of the freezing chamber and the evaporator and hot air (relatively speaking) of the refrigerating chamber by using a fan and an air duct, so that the temperature of the refrigerating chamber can be slightly reduced, the temperature of the refrigerating chamber is prevented from being increased more during defrosting, and on the other hand, the hot air of the freezing chamber and the evaporator is convected onto the freezing chamber and the evaporator, so that preheating defrosting can be performed on frost layers on the upper surfaces of the freezing chamber and the evaporator;

in the second precooling stage, the control principle is the same as that in the first precooling stage, if Tc is detected to be less than or equal to a7 (the value range of a7 is-0.5 to less than or equal to a7 and is less than or equal to 0.5, the preferred optional value is 0, and the unit is C), the cyclic preheating stage is skipped, and the defrosting heating stage is entered.

Further optionally, with reference to the flowchart of fig. 4, the cyclic preheating stage includes a first cyclic preheating stage (i.e., cyclic preheating stage 1) and a second cyclic preheating stage (i.e., cyclic preheating stage 2), and after determining that the cyclic preheating stage needs to be entered in the first precooling stage, the defrosting method includes steps S81 to S84, where:

s81, acquiring a set temperature Tcs of the refrigerating chamber;

s82, judging whether the Tcs meets the Tcs < a8, if so, executing S83, and if not, executing S84;

s83, entering a first cyclic preheating stage;

s84, entering a second circulation preheating stage;

the operating duration of the preheating phase of the first cycle is less than the operating duration of the preheating phase of the second cycle, a8 represents a fourth preset value, preferably 5 ℃.

The first and second circulation preheating functions are the same, and the cold air of the freezing chamber and the evaporator and the hot air (relatively speaking) of the refrigerating chamber are subjected to circulation convection by using the fan and the air duct, and one function is to slightly reduce the temperature of the refrigerating chamber and prevent the temperature of the refrigerating chamber from rising more during defrosting. The other effect is that hot air convection of the refrigerating chamber is to the freezing chamber and the evaporator, preheating defrosting can be carried out on the frost layer on the freezing chamber and the evaporator, defrosting time is shortened to a certain extent, and certain energy consumption can be saved. The control rules of operation are different only according to different preset temperature conditions of the refrigerating chamber.

Further optionally, with reference to the schematic flow chart of fig. 4, in the first cycle preheating stage, the defrosting method further includes steps S831 to S833, where:

s831 determining a refrigerating compartment shutdown point Tt3 corresponding to a refrigerating compartment set temperature Tcs;

s832, monitoring the temperature Tc of the refrigerating chamber, and recording the cyclic preheating time t3;

s833, if the detected Tc is not more than Tt3-a3 or t3 is not less than b3, exiting the first cycle preheating stage;

a3 represents a third temperature adjustment value, which is preferably 1 (° c) in this embodiment, and b3 represents a third preset duration.

Specifically, with reference to fig. 4, if it is detected that Tcs is less than 5, the method enters a cyclic preheating stage 1, starts to count time as t3, and constantly collects the temperature Tc of the temperature sensor of the refrigerating chamber, wherein the control of the stage is that the refrigerating damper and the refrigerating fan are in an open state, and other devices and loads are in a closed state; during the control process of the stage, whether Tc meets Tc ≤ Tt3-1 and t3 meets t3 ≥ b3 is detected, and if Tc ≤ Tt3-1 or t3 ≥ b3 (b 3 is 2 ≤ b3 ≤ 4, preferably 3, and min) is detected, the cyclic preheating stage is exited.

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

s841, determining a refrigerating compartment stop point Tt3 corresponding to a refrigerating compartment set temperature Tcs;

s842, monitoring the temperature Tc of the refrigerating chamber, and recording the cyclic preheating time t4;

s843, if the Tc is not less than Tt3-a4 or t4 is not less than b4, the second cycle preheating stage is exited, c1 is more than 0 and less than c2, and b3 is more than b4;

a4 represents a fourth temperature adjustment value, which is preferably 2 (. Degree. C.) in this embodiment, and b4 represents a fourth preset time period, 0 < a3 < a4, and b3 < b4.

Specifically, with reference to fig. 4, if it is detected that Tcs is less than 5, the method enters a cyclic preheating stage 2, starts to count time as t4, and constantly collects the temperature Tc of the temperature sensor of the refrigerating chamber, wherein the control of the stage is that the refrigerating damper and the refrigerating fan are in an open state, and other devices and loads are in a closed state; during the control process of the stage, whether Tc meets Tc is less than or equal to Tt3-2 and t4 meets t4 is more than or equal to b4 is detected, and if Tc is less than or equal to Tt3-2 or t4 is more than or equal to b4 (the value range of b4 is 5 less than or equal to b4 less than or equal to 7, the preferable optional value is 6, and the unit is min) is met, the cyclic preheating stage is exited.

Further optionally, the cyclic preheating stage further includes a third cyclic preheating stage and a fourth cyclic preheating stage, and in the second precooling stage, after it is determined that the cyclic preheating stage needs to be entered, the defrosting method includes S85 to S88, where:

s85, acquiring a set temperature Tcs of the refrigerating chamber;

s86, judging whether the Tcs meets the condition that the Tcs is less than a8, if so, executing S87, and if not, executing S88;

s87, entering a third circulation preheating stage;

s88, entering a fourth cycle preheating stage;

the operating duration of the preheating stage of the third cycle is less than that of the preheating stage of the fourth cycle, a8 represents a fourth preset value, preferably 5 ℃.

The third and fourth circulating preheating functions are the same, and the cold air of the freezing chamber and the evaporator and the hot air (relatively speaking) of the refrigerating chamber are subjected to circulating convection by using the fan and the air duct, and one function is to slightly reduce the temperature of the refrigerating chamber and prevent the temperature of the refrigerating chamber from rising more during defrosting. The other effect is that hot air convection of the refrigerating chamber is to the freezing chamber and the evaporator, preheating defrosting can be carried out on the frost layer on the freezing chamber and the evaporator, defrosting time is shortened to a certain extent, and certain energy consumption can be saved. The control rules of operation are different only according to different preset temperature conditions of the refrigerating chamber.

Further optionally, in the third cycle preheating stage, the defrosting method further includes S871 to S873, where:

s871, determining a refrigerating chamber stopping point Tt5 corresponding to the set refrigerating chamber temperature Tcs;

s872, monitoring the temperature Tc of the refrigerating chamber, and recording the cyclic preheating time t4;

s873, if the Tc is not more than Tt4-a5 or t5 is not less than b5, exiting the third cycle preheating stage;

a5 represents a fifth temperature adjustment value, which is preferably 0.5 (. Degree. C.) in the present embodiment, and b5 represents a fifth preset time period.

Specifically, if the condition that Tcs is less than 5 is detected, entering a cyclic preheating stage 3, starting timing to be recorded as t5, and constantly acquiring the temperature Tc of a refrigerating chamber temperature sensor, wherein the control of the stage is that a refrigerating air door and a freezing fan are in an open state, and other devices and loads are in a closed state; during the control process of the stage, whether Tc meets Tc which is less than or equal to Tt3-0.5 and t5 which is more than or equal to t5 is detected, if Tc which is less than or equal to Tt4-0.5 or t5 which is more than or equal to b5 (the value range of b5 is 1 which is less than or equal to b5 which is less than or equal to 3, the preferable optional value is 2, and the unit is min) is met, the cyclic preheating stage is exited.

Further optionally, in the fourth cycle preheating stage, the defrosting method further includes S881 to S883, where:

s881, determining a refrigerating compartment shutdown point Tt4 corresponding to the refrigerating compartment set temperature Tcs;

s882, monitoring the temperature Tc of the refrigerating chamber, and recording the circulating preheating time t6;

s883, if the Tc is not less than Tt3-a6 or t6 is not less than b6, exiting the fourth cycle preheating stage, wherein c3 is more than c4, and b5 is more than b6;

a6 represents a sixth temperature adjustment value, which is preferably 1.5 (deg.C) in the present embodiment, and b6 represents a sixth preset time period; a5 is more than 0 and less than a6, and b5 is more than b6.

Specifically, if it is detected that Tcs is less than 5, entering a cyclic preheating stage 4, starting timing to be t6, and constantly acquiring the temperature Tc of a temperature sensor of a refrigerating chamber, wherein the control of the stage is that a refrigerating air door and a freezing fan are in an open state, and other devices and loads are in a closed state; during the control process of the stage, whether Tc meets Tc is less than or equal to Tt3-1.5 and t6 meets t6 is more than or equal to b6 is detected, and if Tc is less than or equal to Tt4-1.5 or t6 is more than or equal to b6 (the value range of b6 is more than or equal to 4 and less than or equal to b6, the preferable optional value is 5, and the unit is min) is met, the cyclic preheating stage is exited.

And exiting the cyclic preheating stage.

And entering a defrosting heating stage, turning on a defrosting heater and turning off other devices.

And after the defrosting heating is finished, the defrosting mode is exited, and the next normal refrigeration cycle is entered.

In a second aspect, the present invention provides a defrosting apparatus for a cold storage device, which includes one or more processors and a non-transitory computer-readable storage medium storing program instructions, wherein when the program instructions are executed by the one or more processors, the one or more processors are used to implement the method in any one of the first aspect embodiments.

In an embodiment of a third aspect of the present invention, there is provided a cold storage apparatus using the method of any one of the embodiments of the first aspect, or including the apparatus of the second aspect.

According to the cold storage equipment, the defrosting method and the defrosting device of the cold storage equipment, firstly, the control rule of a precooling stage is determined according to the ambient temperature when the cold storage equipment enters a defrosting mode, and the influence of high ambient temperature on temperature rise before and after chamber defrosting is large; and after the pre-cooling stage is executed, determining whether to enter a cyclic preheating stage according to the collected refrigerating chamber temperature sensor. The stage corresponds to the operation rule of the cyclic preheating stage based on the ambient temperature, the actual temperature of the refrigerating chamber and the refrigerating set temperature, the temperature fluctuation of the refrigerating chamber can be effectively reduced, the temperature rise of the refrigerating chamber after defrosting is prevented from being large, and the temperature uniformity of the chamber is ensured. In addition, the refrigeration air door and the freezing fan are opened to enable air among the refrigerating chamber, the freezing chamber and the evaporator to circulate, on one hand, cold air of the freezing chamber and the evaporator can be blown into the refrigerating chamber, the temperature of the refrigerating chamber is reduced to prevent large temperature rise after defrosting, on the other hand, hot air (opposite) of the refrigerating chamber is circulated to the refrigerating chamber and the evaporator to preheat and defrost in advance, the starting time of a defrosting heater at the next stage can be shortened to a certain extent, the energy consumption of cold storage equipment is saved, and the stability and the reliability of defrosting are improved.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The defrosting method of the cold storage equipment is characterized in that a precooling stage is arranged in a defrosting mode of the cold storage equipment, the precooling stage is used for reducing a stop point of a freezing chamber, and the defrosting method comprises the following steps:

when the cold storage equipment enters the defrosting mode, the cold storage equipment is firstly controlled to enter the precooling stage;

and controlling the cold storage equipment to run in a defrosting mode according to the new freezing chamber stop point.

2. The defrosting method according to claim 1, wherein the determining the control rule of the pre-cooling stage according to the outside environment temperature and the determining the new freezing chamber stop point according to the control rule comprise:

3. The defrosting method according to claim 2, wherein the pre-cooling stage comprises a first pre-cooling stage and a second pre-cooling stage, and the pre-cooling stage is configured to determine an environment temperature range in which the external environment temperature is located, enter different pre-cooling stages according to different environment temperature ranges, and determine corresponding temperature adjustment values; in different precooling stages, determining a corresponding stop point of a new freezing chamber according to a corresponding temperature adjusting value and a freezing chamber set temperature, wherein the stop point comprises the following steps:

when the external environment temperature is greater than a first preset value, entering a first precooling stage, and setting the stop point of the new freezing chamber to Tt1, wherein Tt1= Tds-a2;

entering a second precooling stage when the outside environment temperature is less than or equal to the first preset value, and setting the stop point of the new freezing chamber to Tt2, wherein Tt2= Tds-a3;

wherein, tds is the set temperature of the freezing chamber, a2 is a first temperature adjustment value, a3 is a second temperature adjustment value, and a2 > a3 > 0.

4. The defrosting method of claim 3, wherein in the pre-cooling stage, the defrosting method further comprises:

and judging the time for exiting the pre-cooling stage according to the temperature of the freezing chamber and the operation duration of the pre-cooling stage.

5. The defrosting method according to claim 4, wherein in the first pre-cooling stage, the pre-cooling stage operation duration is recorded as t1, and the judging the timing of exiting the pre-cooling stage according to the freezer temperature and the pre-cooling stage operation duration includes:

judging whether Td meets the condition that Td is less than or equal to Tt1, and if yes, exiting the first precooling stage; if the content of the active carbon is not satisfied,

judging whether t1 satisfies that t1 is more than or equal to b1, if so, exiting the first precooling stage, if not,

turning to the step of judging whether Td is less than or equal to Tt 1;

wherein Td represents the freezer temperature, and b1 represents a first preset time period.

6. The defrosting method according to claim 4, wherein in the second pre-cooling stage, the running time of the pre-cooling stage is recorded as t2, and the judging the timing of exiting the pre-cooling stage according to the freezer temperature and the running time of the pre-cooling stage comprises:

judging whether Td meets the condition that Td is less than or equal to Tt2, and if yes, exiting the second precooling stage; if the content of the active carbon is not satisfied,

turning to the step of judging whether Td is less than or equal to Tt 1;

wherein Td represents the freezer temperature and b2 represents a second predetermined time period.

7. The defrosting method according to any one of claims 1 to 6, wherein the defrosting process is further provided with a cycle preheating stage and a defrosting heating stage, the cycle preheating stage controls a refrigerating damper and a freezing fan to be in an open state, and after the precooling stage is completed, the defrosting method further comprises:

acquiring the current refrigerating chamber temperature Tc;

if yes, entering the cyclic preheating stage;

if not, entering the defrosting heating stage.

8. The defrosting method according to claim 7, wherein the judging whether the current refrigerating chamber temperature Tc meets a preset condition comprises:

in the first precooling stage, judging whether Tc meets Tc which is not more than a4, if not, determining that the preset condition is met;

in the second precooling stage, judging whether Tc meets Tc which is not more than a7, if not, determining that the preset condition is met;

9. The defrosting method according to claim 7, wherein the cyclic preheating stage comprises a first cyclic preheating stage and a second cyclic preheating stage, and in the first precooling stage, the defrosting method further comprises:

acquiring a set temperature Tcs of a refrigerating chamber;

if not, entering a second circulation preheating stage;

wherein the operation duration of the first cyclic preheating stage is shorter than the operation duration of the second cyclic preheating stage, and a8 represents a fourth preset value.

10. The defrosting method according to claim 9, further comprising, in the first cyclic preheating stage:

determining a refrigerating chamber stop point Tt3 corresponding to the refrigerating chamber set temperature Tcs;

if Tc is not more than Tt3-a3 or t3 is not less than b3, the first cycle preheating stage is exited;

11. The defrosting method of claim 9 further comprising, during the second cycle preheating phase:

if Tc is less than or equal to Tt3-a4 or t4 is more than or equal to b4, the second circulation preheating stage is exited

12. The defrosting method of claim 7 wherein the cyclic preheating phase further comprises a third cyclic preheating phase and a fourth cyclic preheating phase, and in the second pre-cooling phase, the defrosting method further comprises:

acquiring a set temperature Tcs of a refrigerating chamber;

if not, entering a fourth cycle preheating stage;

wherein the operation duration of the third cyclic preheating stage is less than the operation duration of the fourth cyclic preheating stage, and a8 represents a fourth preset value.

13. The defrosting method of claim 12 wherein in the third cycle preheating stage, the defrosting method further comprises:

14. The defrosting method of claim 12 wherein in the fourth cycle preheating stage, the defrosting method further comprises:

determining a refrigerating chamber shutdown point Tt4 corresponding to the refrigerating chamber set temperature Tcs;

if Tc is not more than Tt3-a6 or t6 is not less than b6, the fourth cycle preheating stage is exited, c3 is more than c4, and b5 is more than b6;

15. A defrosting apparatus of a cold storage device, characterized in that it comprises one or more processors and a non-transitory computer-readable storage medium storing program instructions which, when executed by the one or more processors, are configured to implement the defrosting method according to any one of claims 1 to 14.

16. A cold storage facility, characterized in that it employs the defrosting method of any one of claims 1 to 14 or comprises the defrosting apparatus of claim 15.