A temperature control method, device and low temperature storage device

Abstract

The present invention discloses a temperature control method, device and low-temperature storage equipment. The method comprises: obtaining the indoor environment temperature and the compartment temperature in each room, and calculating the difference between the compartment temperature in each room and the indoor environment temperature; judging whether the temperature sensor of each room and / or the indoor environment temperature sensor is invalid according to the difference between the compartment temperature in each room and the indoor environment temperature; after judging that the temperature sensor of each room and / or the indoor environment temperature sensor is invalid, controlling the low-temperature storage equipment to enter the sensor failure control mode. The present invention can avoid the problem that the maintenance personnel fail to come to the door for maintenance in time after the temperature sensor of the low-temperature storage equipment is abnormal, resulting in the food spoiling or being frozen, thereby improving the user experience.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a temperature control method, device and low-temperature storage equipment. Background Art

[0002] At present, most low-temperature storage devices (such as refrigerators) on the market have one or more temperature sensors that fail during use, and the corresponding compartments and other compartments will operate in an abnormal mode, causing abnormal compartment temperatures in the low-temperature storage devices. If maintenance personnel do not come to repair the abnormal temperature sensor in time, the food will directly go bad or be frozen, affecting the user experience.

[0003] In the prior art, when a temperature sensor of a low-temperature storage device becomes abnormal, if maintenance personnel do not come to repair it in time, the food may directly go bad or be frozen. Currently, no effective solution has been proposed. Summary of the invention

[0004] A temperature control method, device and low-temperature storage device are provided in the embodiments of the present invention to solve the problem in the prior art that when a temperature sensor of a low-temperature storage device becomes abnormal, if maintenance personnel do not come to repair it in time, it will directly cause food to spoil or be frozen.

[0005] In order to solve the above technical problems, the present invention provides a temperature control method applied to low-temperature storage equipment, the method comprising:

[0006] Acquire the indoor ambient temperature and the compartment temperature of each room, and calculate the difference between the compartment temperature of each room and the indoor ambient temperature;

[0007] Determining whether the temperature sensor of each compartment and / or the indoor ambient temperature sensor is failed according to the difference between the compartment temperature in each compartment and the indoor ambient temperature;

[0008] After determining that the temperature sensors of each compartment and / or the indoor environment temperature sensor have failed, the low-temperature storage device is controlled to enter a sensor failure control mode.

[0009] Further, judging whether the temperature sensor of each compartment and / or the indoor environment temperature sensor fails according to the difference between the compartment temperature in each compartment and the indoor environment temperature includes:

[0010] Obtain the indoor ambient temperature range through the network;

[0011] Determine the difference interval of each compartment according to the indoor ambient temperature interval and the set temperature of each compartment; wherein each compartment corresponds to a difference interval;

[0012] Determine in turn whether the difference between the compartment temperature in each compartment and the indoor ambient temperature is within the difference interval corresponding to the compartment;

[0013] If yes, it is determined that the temperature sensor in the room and / or the indoor environment temperature sensor are failed;

[0014] If not, it is determined that both the temperature sensor in the room and the indoor ambient temperature sensor are not failed.

[0015] Further, determining the difference interval of each compartment according to the indoor ambient temperature interval and the set temperature of each compartment includes:

[0016] Determine the lower and upper limits of the indoor ambient temperature range;

[0017] Calculate the difference between the lower limit of the indoor ambient temperature range and the set temperature of each room, and obtain the lower limit of the difference range of each room;

[0018] Calculate the difference between the upper limit of the indoor ambient temperature range and the set temperature of each room, and obtain the upper limit of the difference range of each room;

[0019] The difference interval of each compartment is obtained according to the lower limit value of the difference interval of each compartment and the upper limit value of the difference interval of each compartment.

[0020] Furthermore, after obtaining the difference interval of each compartment according to the lower limit value of the difference interval of each compartment and the upper limit value of the difference interval of each compartment, the method further includes:

[0021] Determine the interval error;

[0022] The difference interval is corrected according to the interval error.

[0023] Further, controlling the low temperature storage device to enter a sensor failure control mode includes:

[0024] Determine in turn whether food is stored in each compartment, and then control the air doors in the compartments where no food is stored to close;

[0025] Determining the start-up rate of the compressor according to the preset indoor ambient temperature value, the number of compartments with closed dampers, or the cooling demand;

[0026] Then, different control strategies are adopted to control the opening and closing time of the damper in the room where the food is stored according to whether the temperature sensor fails.

[0027] Furthermore, different control strategies are used to control the opening and closing time of the damper in the room storing food according to whether the temperature sensor fails, including:

[0028] If the temperature sensor in the compartment fails, the opening and closing time of the damper in the compartment is controlled according to the preset indoor ambient temperature value;

[0029] If the temperature sensor in the compartment is not invalid, the opening and closing time of the damper in the compartment is controlled according to the compartment temperature detected by the temperature sensor and the set temperature of the compartment.

[0030] The present invention also provides a temperature control device, which is applied to low-temperature storage equipment, and the device comprises:

[0031] A calculation module, used for obtaining the indoor environment temperature and the compartment temperature in each room, and calculating the difference between the compartment temperature in each room and the indoor environment temperature;

[0032] A judgment module, used for judging whether the temperature sensor of each compartment and / or the indoor environment temperature sensor is invalid according to the difference between the compartment temperature in each compartment and the indoor environment temperature;

[0033] The control module is used to control the low-temperature storage device to enter a sensor failure control mode after determining that the temperature sensors of each compartment and / or the indoor environment temperature sensor have failed.

[0034] The present invention also provides a low-temperature storage device, comprising the above-mentioned temperature control device.

[0035] Furthermore, the low-temperature storage device includes at least one of the following: a refrigerator, a freezer, a refrigerated cabinet, and a display cabinet.

[0036] The present invention also provides a computer-readable storage medium on which a computer program is stored, and the program implements the above-mentioned temperature control method when executed by a processor.

[0037] By applying the technical solution of the present invention, it is determined whether the temperature sensor of each compartment and / or the indoor ambient temperature sensor has failed according to the difference between the compartment temperature in each compartment and the indoor ambient temperature. After determining that the temperature sensor of each compartment and / or the indoor ambient temperature sensor has failed, the low-temperature storage device is controlled to enter the sensor failure control mode. This can avoid the problem that after the temperature sensor of the low-temperature storage device becomes abnormal, the maintenance personnel fail to come to the door for maintenance in time, resulting in the food spoiling or being frozen, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a flow chart of a temperature control method according to an embodiment of the present invention;

[0039] Figure 2 is a flow chart of a temperature control method according to another embodiment of the present invention;

[0040] Figure 34 is a structural block diagram of a temperature control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0043] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0044] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0045] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0046] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0047] Example 1

[0048] This embodiment provides a temperature control method, which is applied to low-temperature storage equipment. Figure 1is a flow chart of a temperature control method according to an embodiment of the present invention. Figure 1 As shown, the method includes:

[0049] S101, obtaining the indoor environment temperature and the compartment temperature of each room, and calculating the difference between the compartment temperature of each room and the indoor environment temperature.

[0050] The indoor ambient temperature is detected by the indoor temperature sensor and then transmitted to the calculation module; the compartment temperature in each room is detected by the temperature sensor in each room and then transmitted to the calculation module. The calculation module calculates the difference between the compartment temperature in each room and the indoor ambient temperature.

[0051] S102: judging whether the temperature sensor of each compartment and / or the indoor ambient temperature sensor is invalid according to the difference between the compartment temperature in each compartment and the indoor ambient temperature.

[0052] If the temperature sensors of each room and the indoor environment temperature sensors are not invalid, then the difference between the room temperature in each room and the indoor environment temperature should always be within a certain range. However, if the temperature sensors of each room and / or the indoor environment temperature sensors fail, then the difference between the room temperature in each room and the indoor environment temperature should exceed the above range. Therefore, it can be judged whether the temperature sensors of each room and / or the indoor environment temperature sensors fail according to the difference between the room temperature in each room and the indoor environment temperature.

[0053] S103, after determining that the temperature sensors of each compartment and / or the indoor environment temperature sensor have failed, controlling the low-temperature storage device to enter a sensor failure control mode.

[0054] After determining that the temperature sensors of each compartment and / or the indoor ambient temperature sensor have failed, in order to avoid untimely maintenance leading to abnormal temperature of the low-temperature storage equipment, it is necessary to control the low-temperature storage equipment to enter the sensor failure control mode to maintain normal refrigeration.

[0055] The temperature control method of this embodiment determines whether the temperature sensor of each compartment and / or the indoor ambient temperature sensor has failed according to the difference between the compartment temperature in each compartment and the indoor ambient temperature. After determining that the temperature sensor of each compartment and / or the indoor ambient temperature sensor has failed, the low-temperature storage device is controlled to enter the sensor failure control mode, which can avoid the problem that after the temperature sensor of the low-temperature storage device becomes abnormal, the maintenance personnel fail to come to the door for maintenance in time, resulting in the food spoiling or being frozen, thereby improving the user experience.

[0056] In order to obtain the range in which the difference between the compartment temperature in each room and the indoor ambient temperature should be, it is necessary to obtain the indoor ambient temperature by means other than the temperature sensor as a reference. Therefore, judging whether the temperature sensor of each room and the indoor ambient temperature sensor are invalid according to the difference between the compartment temperature in each room and the indoor ambient temperature includes: obtaining the indoor ambient temperature range through the network. Specifically, the WIFI function of the low-temperature storage device can be used to obtain the local geographical location and the local seasonal climate, and the indoor ambient temperature range in which the low-temperature storage device is currently located can be judged. The difference range of each room is determined according to the above-mentioned indoor ambient temperature range and the set temperature of each room; wherein each room corresponds to a difference range; judging in turn whether the difference between the compartment temperature in each room and the indoor ambient temperature is within the difference range corresponding to the room; if yes, judging that the temperature sensor and / or the indoor ambient temperature sensor in the room are invalid; if not, judging that the temperature sensor and the indoor ambient temperature sensor in the room are not invalid.

[0057] Determine the difference interval of each room according to the indoor ambient temperature interval and the set temperature of each room, specifically including: determine the lower limit value and the upper limit value of the indoor ambient temperature interval; calculate the difference between the lower limit value of the indoor ambient temperature interval and the set temperature of each room, and obtain the lower limit value of the difference interval of each room; calculate the difference between the upper limit value of the indoor ambient temperature interval and the set temperature of each room, and obtain the upper limit value of the difference interval of each room; obtain the difference interval of each room according to the lower limit value of the difference interval of each room and the upper limit value of the difference interval of each room.

[0058] For example, according to the geographical location, seasonal climate differences, and user living habits, the indoor environment temperature Thj of the low-temperature storage equipment is roughly divided into several intervals [for example, [10℃≤Thj≤20℃), [20℃<Thj≤30℃), [30℃<Thj≤40℃]], and the difference range between the indoor environment temperature sensor and the temperature sensors of each compartment is determined according to the above intervals. The difference range changes according to the current set temperature of each compartment [for example, when the refrigeration compartment is set to 4℃ and the freezing compartment is set to -18℃, the difference △Tlc range between the detection value of the indoor environment temperature sensor and the detection value of the refrigeration sensor is [6℃≤△Tlc≤16℃), [16℃<△Tlc≤26℃), [26℃<△Tlc≤36℃]; the difference △Tld range between the detection value of the indoor environment temperature sensor and the detection value of the freezing sensor is [28℃≤△Tld≤38℃), [38℃<△Tld≤48℃), [48℃<△Tld≤58℃]].

[0059] In order to correct the above-mentioned interval range and avoid misjudgment, after obtaining the difference interval of each compartment according to the lower limit value of the difference interval of each compartment and the upper limit value of the difference interval of each compartment, the above-mentioned method also includes: determining the interval error; correcting the difference interval according to the interval error. In specific implementation, an error range of ±1 to 2°C can be set on the basis of the above-mentioned difference interval. For example, after determining that the difference interval of a compartment is [6°C≤△Tlc≤16°C), a certain error of 1°C can be added to the upper and lower limits of the interval, and the difference interval can be corrected to [5°C≤△Tlc≤17°C). Or a certain error of 1°C can be subtracted from the upper and lower limits of the interval, and the difference interval can be corrected to [7°C≤△Tlc≤15°C).

[0060] According to the above, after determining that the temperature sensors of each compartment and / or the indoor ambient temperature sensors have failed, in order to avoid untimely maintenance resulting in abnormal temperature of the low-temperature storage device, it is necessary to control the low-temperature storage device to enter the sensor failure control mode to maintain normal refrigeration. Specifically, controlling the low-temperature storage device to enter the sensor failure control mode includes: determining in turn whether food is stored in each compartment, and then controlling the dampers in the compartments where no food is stored to close; determining the start-up rate of the compressor according to the preset indoor ambient temperature value, the number of compartments with closed dampers, or the cooling demand; and then adopting different control strategies to control the opening and closing time of the dampers in the compartments where food is stored according to whether the temperature sensor has failed.

[0061] It should be noted that, since the failure of the temperature sensor of each compartment and / or the indoor ambient temperature sensor is judged by the difference between the compartment temperature in each compartment and the indoor ambient temperature, when the difference between the compartment temperature in each compartment and the indoor ambient temperature is not within the difference range, it may be that the temperature sensor of the compartment has failed, it may be that the indoor ambient temperature sensor has failed, or both have failed, but the difference judgment method cannot further determine which situation it is. For the sake of safety, at this time, the low-temperature storage device is controlled to enter the sensor failure control mode according to the situation that both the compartment temperature sensor and the indoor ambient temperature sensor have failed.

[0062] In the case where the temperature sensor of the compartment fails, the opening and closing time of the damper in the compartment can only be controlled according to the preset indoor ambient temperature value, wherein the control scheme for controlling the opening and closing time of the damper in the compartment according to the preset indoor ambient temperature value is pre-set, and in actual application, it is sufficient to trigger the corresponding program, for example, the preset indoor ambient temperature value is 25°C, and the program sets the indoor ambient temperature value to 25°C, and the damper is opened for 20% of the time and closed for 80% of the time in a control cycle; in the case where the temperature sensor of the compartment does not fail, the opening and closing time of the damper in the compartment can be controlled according to the compartment temperature detected by the temperature sensor and the set temperature of the compartment, and the opening and closing time of the damper in the compartment according to the compartment temperature detected by the temperature sensor and the set temperature of the compartment is also completed by a pre-stored program.

[0063] That is to say, different control strategies are adopted to control the opening and closing time of the damper in the compartment for storing food according to whether the temperature sensor fails, including: if the temperature sensor in the compartment fails, the opening and closing time of the damper in the compartment is controlled according to a preset indoor ambient temperature value; if the temperature sensor in the compartment is not failed, the opening and closing time of the damper in the compartment is controlled according to the compartment temperature detected by the temperature sensor and the set temperature of the compartment.

[0064] Example 2

[0065] This embodiment provides another temperature control method. The present invention is described in detail below by taking a low-temperature storage device as a refrigerator, which includes a refrigerating compartment and a freezing compartment as an example. Figure 2 is a flow chart of a temperature control method according to another embodiment of the present invention. Figure 2 As shown, the method comprises the following preferred steps:

[0066] S1, control the refrigerator WIFI function to turn on, obtain the geographical location and local seasonal climate, and then infer the range of the indoor ambient temperature Thj of the refrigerator. If 10℃≤Thj<20℃ is satisfied, then execute step S2, if 20℃≤Thj<30℃ is satisfied, then execute step S3, if 30℃≤Thj≤40℃ is satisfied, then execute step S4.

[0067] S2, determine that the difference Tlc interval of the refrigerating compartment is 10℃-T1≤△Tlc<20℃-T1; the difference interval of the freezing compartment is 10℃-T2≤△Tld<20℃-T2.

[0068] S3, determining that the difference interval of the refrigerating compartment is 20°C-T1≤△Tlc<30°C-T1; and the difference interval of the freezing compartment is 20°C-T2≤△Tld<30°C-T2.

[0069] S4, determining that the difference T interval of the refrigerating compartment is 30°C-T1≤△Tlc≤40°C-T1; and the difference interval of the freezing compartment is 30°C-T2≤△Tld≤40°C-T2.

[0070] Among them, T1 is the set temperature of the refrigeration compartment, and T2 is the set temperature of the freezing compartment.

[0071] S5, collecting the difference between the detection values ​​of the indoor environment temperature sensor and the compartment temperature sensor. If the difference △Tlc of the refrigerating compartment is not within the temperature difference interval, and the difference △Tld of the freezing compartment is within the temperature difference interval, then executing step S6, if the difference △Tlc of the refrigerating compartment is not within the temperature difference interval, and the difference △Tld of the freezing compartment is not within the temperature difference interval, then executing step S12, if the difference △Tlc of the refrigerating compartment is within the temperature difference interval, and the difference △Tld of the freezing compartment is not within the temperature difference interval, then executing step S14.

[0072] During the normal operation of the refrigerator, the difference between the indoor ambient temperature sensor detection value and the compartment sensor detection value is collected at regular intervals and compared with the difference range to confirm whether the sensor has any faults.

[0073] When the collected temperature difference exceeds the temperature difference range, it is determined that a sensor somewhere in the refrigerator is faulty, the refrigerator alarms, and a prompt signal appears on its display screen, indicating that the indoor ambient temperature sensor or a room sensor is faulty.

[0074] S6, determine that the refrigeration sensor and the ambient temperature sensor are faulty.

[0075] S7, judging the storage conditions of food in the refrigerator and freezer. If the refrigerator has no food and the freezer has no food, then execute step S8; if the refrigerator has food and the freezer has food, then execute step S9; if the refrigerator has no food and the freezer has food, then execute step S10; if the refrigerator has food and the freezer has food, then execute step S11.

[0076] S8, controls the compressor and each damper to close.

[0077] S9, controls the compressor start rate according to the fixed ambient temperature of 25℃ and the situation that there is refrigeration demand in both the refrigerator and freezer, controls the opening and closing time of the damper of the refrigerator according to the fixed ambient temperature of 25℃; controls the opening and closing time of the damper of the freezer according to the temperature detected by the temperature sensor of the freezer and the freezing set temperature.

[0078] S10, close the damper of the refrigerator compartment, and control the compressor start-up rate according to the fixed ambient temperature of 25°C and the situation that only the freezer compartment has a refrigeration demand. For example, the compressor start-up rate is 80%. In one start-stop cycle, the compressor is started for 80 minutes and stopped for 20 minutes. The refrigeration time for freezing alone is 60 minutes, and the refrigeration time for freezing and refrigeration together is 20 minutes (the opening time of the damper of the refrigerator compartment is 20 minutes, and the closing time is 80 minutes). After entering the sensor failure control program and receiving the signal of the forced closure of the damper of the refrigerator compartment, the compressor start-up rate becomes 60%, and only the freezing alone is refrigerated for 60 minutes and then stopped for 40 minutes; the opening and closing time of the damper of the freezer compartment is controlled according to the temperature detected by the temperature sensor of the freezer compartment and the freezing set temperature. For example, when the freezing set temperature is -18°C, the opening and closing temperature points of the damper of the freezer compartment can be -18°C / -20°C.

[0079] S11, close the damper of the freezer compartment, control the start-up rate of the compressor according to the fixed ambient temperature of 25°C and the situation that only the refrigerator compartment has a cooling demand, and control the opening and closing time of the damper of the refrigerator compartment according to the fixed ambient temperature of 25°C.

[0080] S12, determine whether the refrigeration, freezing, sensor and ambient temperature sensor are faulty.

[0081] S13, according to the cooling demand in each room and the fixed ambient temperature of 25°C, the start-up rate of the compressor is controlled, and the opening and closing time of the damper of each room is controlled according to the fixed ambient temperature of 25°C.

[0082] S14, determining whether the refrigeration sensor and the ambient temperature sensor are faulty.

[0083] S15, judging the storage conditions of food in the refrigerator and freezer. If the refrigerator has no food and the freezer has no food, then execute step S16; if the refrigerator has food and the freezer has food, then execute step S17; if the refrigerator has no food but the freezer has food, then execute step S18; if the refrigerator has food but the freezer has no food, then execute step S19.

[0084] S16, controls the compressor and each damper to close.

[0085] S17, according to the fixed ambient temperature of 25℃ and the refrigeration demand in both the refrigerator and freezer, the compressor start rate is controlled, the opening and closing time of the air door of the freezer is controlled according to the fixed ambient temperature of 25℃; the opening and closing time of the air door of the refrigerator is controlled according to the temperature detected by the temperature sensor of the refrigerator and the refrigeration setting temperature. For example: when the refrigeration setting temperature is 4℃, the opening and closing temperature points of the air door of the freezer can be 4℃ / 2℃.

[0086] S18, close the damper of the refrigerator compartment, control the start-up rate of the compressor according to the fixed ambient temperature of 25°C and the situation that only the freezer compartment has a cooling demand, and control the opening and closing time of the damper of the freezer compartment according to the fixed ambient temperature of 25°C.

[0087] S19, close the damper of the freezer compartment, control the start-up rate of the compressor according to the fixed ambient temperature of 25°C and the situation that only the refrigerator compartment has a refrigeration demand, and control the opening and closing time of the damper of the refrigerator compartment according to the temperature detected by the temperature sensor of the refrigerator compartment and the refrigeration set temperature.

[0088] Example 3

[0089] This embodiment provides a temperature control device, which is applied to low-temperature storage equipment. Figure 3 : is a structural block diagram of a temperature control device according to an embodiment of the present invention, Figure 3 As shown, the device comprises:

[0090] The calculation module 10 is used to obtain the indoor environment temperature and the compartment temperature in each room, and calculate the difference between the compartment temperature in each room and the indoor environment temperature; wherein the indoor environment temperature is detected by an indoor temperature sensor; the compartment temperature in each room is detected by a temperature sensor in each room.

[0091] The indoor ambient temperature is detected by the indoor temperature sensor and then transmitted to the calculation module; the compartment temperature in each room is detected by the temperature sensor in each room and then transmitted to the calculation module. The calculation module calculates the difference between the compartment temperature in each room and the indoor ambient temperature.

[0092] The judgment module 20 is used to judge whether the temperature sensor of each compartment and / or the indoor environment temperature sensor is invalid according to the difference between the compartment temperature in each compartment and the indoor environment temperature.

[0093] If the temperature sensors of each room and the indoor environment temperature sensors are not invalid, then the difference between the room temperature in each room and the indoor environment temperature should always be within a certain range. However, if the temperature sensors of each room and / or the indoor environment temperature sensors fail, then the difference between the room temperature in each room and the indoor environment temperature should exceed the above range. Therefore, it can be judged whether the temperature sensors of each room and / or the indoor environment temperature sensors fail according to the difference between the room temperature in each room and the indoor environment temperature.

[0094] The control module 30 is used to control the low-temperature storage device to enter a sensor failure control mode after determining that the temperature sensors of each compartment and / or the indoor environment temperature sensor have failed.

[0095] After determining that the temperature sensors of each compartment and / or the indoor ambient temperature sensor have failed, in order to avoid untimely maintenance leading to abnormal temperature of the low-temperature storage equipment, it is necessary to control the low-temperature storage equipment to enter the sensor failure control mode to maintain normal refrigeration.

[0096] In the temperature control device of this embodiment, the calculation module 10 obtains the indoor environment temperature and the compartment temperature in each room, and calculates the difference between the compartment temperature in each room and the indoor environment temperature. The judgment module 20 judges whether the temperature sensor of each room and / or the indoor environment temperature sensor fails according to the difference between the compartment temperature in each room and the indoor environment temperature. After determining that the temperature sensor of each room and / or the indoor environment temperature sensor fails, the control module 30 controls the low-temperature storage device to enter the sensor failure control mode, which can avoid the problem that the maintenance personnel fail to come to the door for maintenance in time after the temperature sensor of the low-temperature storage device is abnormal, resulting in the problem of food spoiling or being frozen, thereby improving the user experience.

[0097] In order to obtain the range in which the difference between the compartment temperature in each room and the indoor ambient temperature should be located, it is necessary to obtain the indoor ambient temperature by means other than the temperature sensor as a reference. Therefore, the judgment module 20 is specifically used to: obtain the indoor ambient temperature range through the network. Specifically, the WIFI function of the low-temperature storage device can be used to obtain the local geographical location and the local seasonal climate, and the indoor ambient temperature range in which the low-temperature storage device is currently located can be determined. The difference interval of each compartment is determined according to the above-mentioned indoor ambient temperature range and the set temperature of each compartment; wherein each compartment corresponds to a difference interval; and whether the difference between the compartment temperature in each compartment and the indoor ambient temperature is located in the difference interval corresponding to the compartment in turn; if so, it is determined that the temperature sensor in the compartment and / or the indoor ambient temperature sensor is invalid; if not, it is determined that the temperature sensor in the compartment and the indoor ambient temperature sensor are not invalid.

[0098] Determine the difference interval of each room according to the indoor ambient temperature interval and the set temperature of each room, specifically including: determine the lower limit value and the upper limit value of the indoor ambient temperature interval; calculate the difference between the lower limit value of the indoor ambient temperature interval and the set temperature of each room, and obtain the lower limit value of the difference interval of each room; calculate the difference between the upper limit value of the indoor ambient temperature interval and the set temperature of each room, and obtain the upper limit value of the difference interval of each room; obtain the difference interval of each room according to the lower limit value of the difference interval of each room and the upper limit value of the difference interval of each room.

[0099] In order to correct the above-mentioned interval range and avoid misjudgment, the judgment module 20 obtains the difference interval of each compartment according to the lower limit value of the difference interval of each compartment and the upper limit value of the difference interval of each compartment, and is also used to: determine the interval error; correct the difference interval according to the interval error. In specific implementation, an error range of ±1 to 2°C can be set on the basis of the above-mentioned difference interval. For example, after determining that the difference interval of a compartment is [6°C≤△Tlc≤16°C), a certain error of 1°C can be added to the upper and lower limits of the interval, and the difference interval can be corrected to [5°C≤△Tlc≤17°C). Or a certain error of 1°C can be subtracted from the upper and lower limits of the interval, and the difference interval can be corrected to [7°C≤△Tlc≤15°C).

[0100] According to the above, after determining that the temperature sensors of each compartment and / or the indoor ambient temperature sensors have failed, in order to avoid untimely maintenance resulting in abnormal temperature of the low-temperature storage device, it is necessary to control the low-temperature storage device to enter the sensor failure control mode to maintain normal refrigeration. The control module 30 is specifically used to: determine in turn whether food is stored in each compartment, and then control the dampers in the compartments where no food is stored to close; determine the start-up rate of the compressor according to the preset indoor ambient temperature value, the number of compartments with closed dampers, or the cooling demand; and then adopt different control strategies to control the opening and closing time of the dampers in the compartments where food is stored according to whether the temperature sensor has failed.

[0101] It should be noted that, since the failure of the temperature sensor of each compartment and / or the indoor ambient temperature sensor is judged by the difference between the compartment temperature in each compartment and the indoor ambient temperature, when the difference between the compartment temperature in each compartment and the indoor ambient temperature is not within the difference range, it may be that the temperature sensor of the compartment has failed, it may be that the indoor ambient temperature sensor has failed, or both have failed, but the difference judgment method cannot further determine which situation it is. For the sake of safety, at this time, the low-temperature storage device is controlled to enter the sensor failure control mode according to the situation that both the compartment temperature sensor and the indoor ambient temperature sensor have failed.

[0102] In the case where the temperature sensor of the compartment fails, the opening and closing time of the damper in the compartment can only be controlled according to the preset indoor ambient temperature value, wherein the control scheme for controlling the opening and closing time of the damper in the compartment according to the preset indoor ambient temperature value is pre-set. In practical application, it is sufficient to trigger the corresponding program. For example, the preset indoor ambient temperature value is 25°C. When the program sets the indoor ambient temperature value to 25°C, the damper is opened for 20% of the time and closed for 80% of the time in a control cycle; in the case where the temperature sensor of the compartment does not fail, the opening and closing time of the damper in the compartment can be controlled according to the compartment temperature detected by the temperature sensor and the set temperature of the compartment. The opening and closing time of the damper in the compartment according to the compartment temperature detected by the temperature sensor and the set temperature of the compartment is also completed by a pre-stored program.

[0103] In summary, the control module 30 is specifically used to: when the temperature sensor in the compartment fails, control the opening and closing time of the damper in the compartment according to the preset indoor ambient temperature value; when the temperature sensor in the compartment does not fail, control the opening and closing time of the damper in the compartment according to the compartment temperature detected by the temperature sensor and the set temperature of the compartment.

[0104] Example 4

[0105] This embodiment provides a low-temperature storage device, including the temperature control device of the above embodiment. The above low-temperature storage device includes at least one of the following: a refrigerator, a freezer, a refrigerated cabinet, and a display cabinet.

[0106] Example 5

[0107] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the temperature control method of the above embodiment is implemented.

[0108] The device embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, i.e., they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0109] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method 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 solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for 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.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A temperature control method, applied to low temperature storage equipment, characterized in that: The method comprises: Acquire the indoor ambient temperature and the compartment temperature of each room, and calculate the difference between the compartment temperature of each room and the indoor ambient temperature; Determining whether the temperature sensor of each compartment and / or the indoor ambient temperature sensor is failed according to the difference between the compartment temperature in each compartment and the indoor ambient temperature; After determining that the temperature sensors of each compartment and / or the indoor environment temperature sensor have failed, the low-temperature storage device is controlled to enter the sensor failure control mode, which includes: using different control strategies to control the opening and closing time of the damper in the compartment for storing food according to whether the temperature sensor has failed, specifically including: if the temperature sensor in the compartment has failed, controlling the opening and closing time of the damper in the compartment according to a preset indoor environment temperature value; if the temperature sensor in the compartment has not failed, controlling the opening and closing time of the damper in the compartment according to the compartment temperature detected by the temperature sensor and the set temperature of the compartment.

2. The method according to claim 1, characterized in that Judging whether the temperature sensor of each compartment and / or the indoor environment temperature sensor is invalid according to the difference between the compartment temperature in each compartment and the indoor environment temperature, including: Obtain the indoor ambient temperature range through the network; Determine the difference interval of each compartment according to the indoor ambient temperature interval and the set temperature of each compartment; wherein each compartment corresponds to a difference interval; Determine in turn whether the difference between the compartment temperature in each compartment and the indoor ambient temperature is within the difference interval corresponding to the compartment; If yes, it is determined that the temperature sensor in the room and / or the indoor environment temperature sensor are failed; If not, it is determined that both the temperature sensor in the room and the indoor ambient temperature sensor are not failed.

3. The method according to claim 2, characterized in that Determining the difference range of each compartment according to the indoor ambient temperature range and the set temperature of each compartment includes: Determine the lower and upper limits of the indoor ambient temperature range; Calculate the difference between the lower limit of the indoor ambient temperature range and the set temperature of each room, and obtain the lower limit of the difference range of each room; Calculate the difference between the upper limit of the indoor ambient temperature range and the set temperature of each room, and obtain the upper limit of the difference range of each room; The difference interval of each compartment is obtained according to the lower limit value of the difference interval of each compartment and the upper limit value of the difference interval of each compartment.

4. The method according to claim 3, characterized in that After obtaining the difference interval of each compartment according to the lower limit value of the difference interval of each compartment and the upper limit value of the difference interval of each compartment, the method further includes: Determine the interval error; The difference interval is corrected according to the interval error.

5. The method according to claim 1, characterized in that Controlling the low temperature storage equipment to enter the sensor failure control mode, further comprising: Determine in turn whether food is stored in each compartment, and then control the air doors in the compartments where no food is stored to close; The start-up rate of the compressor is determined according to the preset indoor ambient temperature value, the number of compartments with closed dampers, or the cooling demand.

6. A temperature control device, applied to low temperature storage equipment, characterized in that: The device comprises: A calculation module, used for obtaining the indoor environment temperature and the compartment temperature in each room, and calculating the difference between the compartment temperature in each room and the indoor environment temperature; A judgment module, used for judging whether the temperature sensor of each compartment and / or the indoor environment temperature sensor is invalid according to the difference between the compartment temperature in each compartment and the indoor environment temperature; The control module is used to control the low-temperature storage device to enter a sensor failure control mode after determining that the temperature sensor of each compartment and / or the indoor environment temperature sensor has failed, including: using different control strategies to control the opening and closing time of the damper in the compartment for storing food according to whether the temperature sensor has failed, specifically including: if the temperature sensor in the compartment has failed, controlling the opening and closing time of the damper in the compartment according to a preset indoor environment temperature value; if the temperature sensor in the compartment has not failed, controlling the opening and closing time of the damper in the compartment according to the compartment temperature detected by the temperature sensor and the set temperature of the compartment.

7. A low temperature storage device, characterized in that: Includes the temperature control device as described in claim 6.

8. The low temperature storage device according to claim 7, characterized in that: The low-temperature storage equipment includes at least one of the following: a refrigerator, a freezer, a refrigerated cabinet, and a display cabinet.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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