Refrigerating cabinet and operation control method thereof

Abstract

The invention discloses a refrigeration cabinet and an operation control method of the refrigeration cabinet. A weight sensor used for detecting the weight of stored articles and a temperature sensor used for detecting the temperature of a chamber are arranged in the storage chamber of the refrigeration cabinet. When it is detected that the door body is opened, the compressor is controlled to stop running; calculating a weight change value according to the object weight detected by the weight sensor before and after the door body is opened; according to the compartment temperature detected by the temperature sensor, the temperature change rate is calculated; and after it is detected that the door body is closed, the operation state and operation parameters of the compressor are controlled according to the door opening duration of the door body, the weight change value and the temperature change rate. By the adoption of the refrigerator, door opening and closing actions, food material weight changes and compartment temperature changes can be effectively combined to control the rotating speed of the compressor, the cooling speed is increased, and the storage quality of food is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration, and in particular to a refrigeration cabinet and an operation control method of the refrigeration cabinet. Background Art

[0002] With the improvement of living standards, users have more and more stringent requirements for food storage conditions. Food needs to be cooled quickly in the refrigerator to minimize water loss and ensure that the food is fresh after being taken out. At present, variable frequency refrigerators are becoming more and more popular. The biggest feature of variable frequency refrigerators is that the speed of the compressor can be changed. By adjusting the speed of the compressor, the refrigerator can be cooled on demand.

[0003] However, the inventors have found that the prior art has at least the following problems: Currently, refrigerators mainly control the compressor speed by obtaining the ambient temperature and combining the temperature level set by the user. When the food changes constantly during the user's use of the refrigerator, it is easy to cause the refrigeration effect to not match the total amount of food, affecting the refrigeration effect of the refrigerator and the storage effect of the food. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a refrigeration cabinet and an operation control method of the refrigeration cabinet, which can effectively combine the door opening and closing actions, food weight changes and compartment temperature changes to control the compressor speed, increase the cooling speed, and improve the storage quality of food.

[0005] To achieve the above object, an embodiment of the present invention provides a refrigeration cabinet, comprising:

[0006] Box;

[0007] A door body, arranged at the opening of the box body;

[0008] A storage compartment, arranged in the box body, for storing items;

[0009] A weight sensor is provided in the storage compartment and is used to detect the weight of the stored items;

[0010] A temperature sensor is provided in the storage compartment and is used to detect the compartment temperature;

[0011] A compressor, disposed in the box, for realizing refrigerant circulation;

[0012] Controller for:

[0013] When it is detected that the door is opened, the compressor is controlled to stop running;

[0014] Calculating a weight change value based on the weight of the items detected by the weight sensor before and after the door is opened;

[0015] Calculating the temperature change rate according to the compartment temperature detected by the temperature sensor;

[0016] After detecting that the door body is closed, the operating state and operating parameters of the compressor are controlled according to the door opening time length, the weight change value and the temperature change rate of the door body.

[0017] As an improvement of the above solution, controlling the operating state and operating parameters of the compressor according to the door opening time, the weight change value and the temperature change rate of the door body includes:

[0018] When the door opening time is less than or equal to the first door opening time threshold, and the weight change value is less than or equal to the first weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and after starting, it runs according to the historical speed; wherein the historical speed is the speed of the compressor when it is in the startup state in the previous start-stop cycle;

[0019] After the compressor starts running, when the temperature change rate is less than or equal to a preset rate threshold, the speed of the compressor is increased according to a first speed adjustment step with a first preset time length as an adjustment period until a preset maximum speed is reached;

[0020] When the temperature change rate is greater than the preset rate threshold, the speed of the compressor is increased according to the second speed adjustment step with a first preset time length as the adjustment period until the preset maximum speed is reached; wherein the first speed adjustment step length is greater than the second speed adjustment step length.

[0021] As an improvement of the above solution, the operating state and operating parameters of the compressor are controlled according to the door opening time of the door body, the weight change value and the temperature change rate, and further includes:

[0022] When the door opening time is less than or equal to a first door opening time threshold, and the weight change value is greater than the first weight threshold, calculating a target speed according to the historical speed and the weight change value;

[0023] Controlling the compressor to start directly, and running at the target speed after starting;

[0024] After the compressor starts running, the speed of the compressor is increased according to the second speed adjustment step with a second preset time length as an adjustment period until a preset maximum speed is reached; wherein the second preset time length is shorter than the first preset time length.

[0025] As an improvement of the above solution, the target speed is calculated according to the historical speed and the weight change value, including:

[0026] According to the historical speed and the weight change value, the target speed is calculated by the following calculation formula:

[0027]

[0028] Wherein, N is the target speed, N0 is the historical speed, M1 and M2 are the weights of the items before and after the door is opened, ΔN is the preset unit speed adjustment value, and ΔM is the unit weight value.

[0029] As an improvement of the above solution, controlling the operating state and operating parameters of the compressor according to the door opening time, the weight change value and the temperature change rate of the door body includes:

[0030] When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is less than the second weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and after startup, it runs according to the historical speed; wherein the historical speed is the speed of the compressor when it is in the startup state in the previous start-stop cycle; the first door opening time threshold is less than the second door opening time threshold;

[0031] Detecting the startup operation time of the compressor after the door is closed;

[0032] When the startup operation time is greater than the preset operation time threshold, if the temperature change rate is less than or equal to the preset rate threshold, the speed of the compressor is adjusted to the preset maximum speed; if the temperature change rate is greater than the preset rate threshold, the speed of the compressor is increased according to the third speed adjustment step with a third preset time as the adjustment period until the preset maximum speed is reached; wherein the preset operation time threshold is greater than the historical startup time, and the historical startup time is the startup time of the compressor in the previous start-stop cycle;

[0033] When the startup operation time is less than or equal to a preset operation time threshold, the current rotation speed of the compressor is maintained unchanged.

[0034] As an improvement of the above solution, the operating state and operating parameters of the compressor are controlled according to the door opening time of the door body, the weight change value and the temperature change rate, and further includes:

[0035] When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is greater than or equal to the second weight threshold and less than or equal to the first weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and to run according to the historical speed after starting; wherein the first weight threshold is greater than the second weight threshold;

[0036] After the compressor starts running, the speed of the compressor is increased according to the third speed adjustment step length with the third preset time length as the adjustment period until the preset maximum speed is reached.

[0037] As an improvement of the above solution, the operating state and operating parameters of the compressor are controlled according to the door opening time of the door body, the weight change value and the temperature change rate, and further includes:

[0038] When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is greater than the first weight threshold, the target speed is calculated according to the historical speed and the weight change value;

[0039] Controlling the compressor to start directly, and running at the target speed after starting;

[0040] After the compressor starts running, the speed of the compressor is increased according to the third speed adjustment step with a third preset time length as the adjustment period until a preset maximum speed is reached.

[0041] As an improvement of the above solution, controlling the operating state and operating parameters of the compressor according to the door opening time, the weight change value and the temperature change rate of the door body includes:

[0042] When the door opening time is greater than a second door opening time threshold, the compressor is controlled to start directly and run at a preset maximum speed until the compressor is controlled to stop when a preset shutdown temperature condition is met.

[0043] As an improvement of the above solution, the refrigerator further includes a human body sensor, which is arranged on the door body and is used to be triggered when human activities are detected within a preset sensing range;

[0044] Then the controller is also used for:

[0045] When the human sensing sensor is triggered and the weight of the object changes, it is determined that the door is detected to be opened;

[0046] After the door is detected to be opened, when the weight of the object does not change within a fourth preset time period, it is determined that the door is detected to be closed.

[0047] An embodiment of the present invention further provides an operation control method of a refrigeration cabinet, the refrigeration cabinet comprising:

[0048] Box;

[0049] A door body, arranged at the opening of the box body;

[0050] A storage compartment, arranged in the box body, for storing items;

[0051] A weight sensor is provided in the storage compartment and is used to detect the weight of the stored items;

[0052] A temperature sensor is provided in the storage compartment and is used to detect the compartment temperature;

[0053] A compressor, disposed in the box, for realizing refrigerant circulation;

[0054] The method comprises:

[0055] When it is detected that the door is opened, the compressor is controlled to stop running;

[0056] Calculating a weight change value based on the weight of the items detected by the weight sensor before and after the door is opened;

[0057] Calculating the temperature change rate according to the compartment temperature detected by the temperature sensor;

[0058] After detecting that the door body is closed, the operating state and operating parameters of the compressor are controlled according to the door opening time length, the weight change value and the temperature change rate of the door body.

[0059] Compared with the prior art, the refrigerator and the operation control method of the refrigerator disclosed in the present invention are provided with a weight sensor for detecting the weight of the stored items and a temperature sensor for detecting the temperature of the compartment in the storage room of the refrigerator. When the door is detected to be open, the compressor is controlled to stop running; the weight change value is calculated according to the weight of the items before and after the door is opened detected by the weight sensor; the temperature change rate is calculated according to the compartment temperature detected by the temperature sensor; after the door is detected to be closed, the operation state and operation parameters of the compressor are controlled according to the door opening time, the weight change value and the temperature change rate. By adopting the technical means of the present invention, a weight sensor and a temperature sensor are provided in the storage room of the refrigerator, and the operation of the compressor is controlled by monitoring the weight change value and the temperature change rate of the items stored in the refrigerator, and combining the door opening and closing time. The temperature change rate can characterize the temperature reduction speed, and the storage heat load can be identified in time, so that the food can be quickly cooled after being placed in the refrigerator, ensuring that the water loss is minimized, the nutrition and freshness of the food are guaranteed, and the storage quality of the food is improved, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 is a first structural schematic diagram of a refrigeration cabinet provided by an embodiment of the present invention;

[0061] Figure 2 is a schematic diagram of a first working process executed by a controller of a refrigeration cabinet in an embodiment of the present invention;

[0062] Figure 3 is a schematic diagram of a second working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention;

[0063] Figure 4 is a schematic diagram of a third working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention;

[0064] Figure 5 is a schematic diagram of a fourth working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention;

[0065] Figure 6 is a schematic diagram of a fifth working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention;

[0066] Figure 7 is a schematic diagram of a sixth working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention;

[0067] Figure 8 is a schematic diagram of a seventh working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention;

[0068] Fig. 9 is a schematic diagram of an eighth working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention;

[0069] Fig.10 It is a second structural schematic diagram of a refrigeration cabinet provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of 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.

[0071] See also Figure 1 , is a first structural schematic diagram of a refrigeration cabinet provided by an embodiment of the present invention. An embodiment of the present invention provides a refrigeration cabinet 10, which may be a refrigerator, a wine cabinet or a medicine cabinet, etc. The refrigeration cabinet 10 includes a box body 11 and a door body 12, which is arranged at the opening of the box body 11 and is used to realize the opening and closing of the box body 11. The refrigeration cabinet 10 also includes at least one storage compartment 13, such as a refrigerator and / or a freezer, for storing items with preservation or freezing requirements. The refrigeration cabinet also includes a refrigeration system for performing refrigeration operations of the refrigeration cabinet. The refrigeration cabinet performs refrigeration operations through the refrigeration system, and provides cold energy to be transmitted to the storage chamber so that the storage chamber is maintained at a constant low temperature state.

[0072] Specifically, taking the refrigerator as an example of the refrigeration cabinet in the embodiment of the present invention, the refrigeration system of the refrigerator is composed of a compressor 14, a condenser, a drying filter, a capillary tube, and an evaporator. The working structure of the refrigeration system includes a compression process, a condensation process, a throttling process, and an evaporation process.

[0073] The compression process is as follows: plug in the power cord of the refrigerator, and when the box needs to be cooled, the compressor starts to work, and the low-temperature, low-pressure refrigerant is sucked into the compressor, compressed into high-temperature, high-pressure superheated gas in the compressor cylinder, and then discharged into the condenser; the condensation process is as follows: the high-temperature, high-pressure refrigerant gas dissipates heat through the condenser, the temperature continues to drop, and is gradually cooled to a saturated vapor at room temperature and high pressure, and further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature. The pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows: the condensed refrigerant saturated liquid flows into the capillary after the moisture and impurities are filtered out by the drying filter, and the refrigerant is throttled and depressurized through it, and the refrigerant becomes a wet vapor at room temperature and low pressure; the evaporation process is as follows: it then begins to absorb heat and vaporize in the evaporator, which not only reduces the temperature of the evaporator and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator returns to the compressor again, repeating the above process, transferring the heat in the refrigerator to the air outside the box, and achieving the purpose of refrigeration.

[0074] The refrigerating cabinet 10 further includes a weight sensor 15, which is disposed in the storage compartment 13, specifically disposed below the position where the items are carried, such as the bottom of the inner container of the storage compartment, and the weight sensor 15 is used to detect the weight of the stored items. The weight sensor 15 can be configured to detect the weight of the items in real time, or can be configured to detect the weight of the items at regular intervals, such as 5 seconds, without affecting the beneficial effects achieved by the present invention.

[0075] The refrigerating cabinet 10 further includes a temperature sensor 16, which is disposed in the storage compartment 13. The temperature sensor 16 is used to detect the compartment temperature of the storage compartment. Optionally, the temperature sensor 16 is an electronic thermostat, and the compartment temperature is collected through a temperature sensing head of the electronic thermostat.

[0076] The refrigeration cabinet 10 also includes a controller 17, which is respectively connected to the door body 12, the compressor 14, the weight sensor 15 and the temperature sensor 16, and is at least used to obtain the collected data of the relevant sensors, monitor the opening or closing state of the door body, and control the operating state and operating parameters of the compressor.

[0077] Specifically, see Figure 2 , is a schematic diagram of a first working process executed by a controller of a refrigeration cabinet in an embodiment of the present invention, wherein the controller 17 is used to execute steps S11 to S14:

[0078] S11, when it is detected that the door is opened, controlling the compressor to stop running;

[0079] S12, calculating a weight change value according to the weight of the items before and after the door is opened detected by the weight sensor;

[0080] S13, calculating the temperature change rate according to the compartment temperature detected by the temperature sensor;

[0081] S14. After detecting that the door body is closed, controlling the operating state and operating parameters of the compressor according to the door opening time, the weight change value and the temperature change rate of the door body.

[0082] In the embodiment of the present invention, after the refrigeration cabinet 10 is powered on, the weight sensor 15 detects the weight of the items stored in the storage compartment 13 in real time and sends it to the controller 17. The controller 17 determines the weight value M1 of the items before the door body 12 is opened and the weight value M2 of the items after the door body 12 is opened based on the weight of the items detected by the weight sensor 15, and obtains the weight change value ΔM′=M2-M1 by calculating the difference between the two. In addition, the temperature sensor 16 detects the compartment temperature of the storage compartment 13 in real time and sends it to the controller 17. The controller 17 calculates the temperature change rate V based on the compartment temperature detected by the temperature sensor 16 to further determine the change in the heat load in the storage compartment. It can be understood that the smaller the temperature change rate V, the faster the heat load cools down. The temperature change rate is defined as:

[0083]

[0084] Among them, Δt refers to the time it takes for the compartment temperature to drop by 1K.

[0085] Furthermore, the controller 17 detects the state of the door 12 in real time, and when it is detected that the door 12 is opened, the compressor 14 is controlled to stop running, so as to reduce the energy consumption of the refrigeration cabinet during the process of opening the door.

[0086] After detecting that the door body is closed, the controller 17 determines the opening time T1 of the door body 12, and determines the operating state of the compressor 14 according to the currently calculated weight change value ΔM′ and the temperature change rate V, and the operating state includes starting operation or stopping operation. At the same time, when the controller 17 controls the compressor 14 to be in the starting operation state, the operating parameters of the compressor 14 are determined, and the operating parameters include the speed of the compressor.

[0087] By adopting the technical means of the embodiment of the present invention, a weight sensor and a temperature sensor are arranged in the storage room of the refrigerator. By monitoring the weight change value and temperature change rate of the items stored in the refrigerator, the operation of the compressor is controlled in combination with the door opening and closing time. The temperature change rate can characterize the temperature reduction speed, and the storage heat load can be identified in time, so that the food can be cooled quickly after being placed in the refrigerator, ensuring that water loss is minimized, ensuring the nutrition and freshness of the food, improving the storage quality of the food, and thus improving the user experience.

[0088] As a preferred implementation, the embodiment of the present invention is further implemented on the basis of the above embodiment. In the first optional implementation, see Figure 3 , is a schematic diagram of a second working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention, step S14, i.e., controlling the operating state and operating parameters of the compressor according to the door opening time, the weight change value and the temperature change rate of the door body, includes:

[0089] When the door opening time is less than or equal to the first door opening time threshold, and the weight change value is less than or equal to the first weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and after starting, it runs according to the historical speed; wherein the historical speed is the speed of the compressor when it is in the startup state in the previous start-stop cycle;

[0090] After the compressor starts running, when the temperature change rate is less than or equal to a preset rate threshold, the speed of the compressor is increased according to a first speed adjustment step with a first preset time length as an adjustment period until a preset maximum speed is reached;

[0091] When the temperature change rate is greater than the preset rate threshold, the speed of the compressor is increased according to the second speed adjustment step with a first preset time length as the adjustment period until the preset maximum speed is reached; wherein the first speed adjustment step length is greater than the second speed adjustment step length.

[0092] In an embodiment of the present invention, a first door opening duration threshold t1 is preset to characterize the shorter opening duration of the refrigerator door. In addition, since the weight change value is obtained by subtracting the weight of the items after the door is opened from the weight of the items before the door is opened, that is, it characterizes the change in the weight of the items after the user uses the refrigerator, a first weight threshold ΔM1 is set to characterize the boundary between the user taking out items or storing a small amount of items and storing a large amount of items after opening the door, and the first weight threshold ΔM1>0.

[0093] When the door opening time T1≤t1, and the weight change value M2-M1≤ΔM1, it indicates that the door opening time is short, and the user only stores a small amount of items or takes out items, which has the least impact on the cooling capacity in the storage room. At this time, the compressor 14 is controlled to start with reference to the startup temperature condition triggered by the thermostat, and after startup, the compressor 14 runs with reference to the speed N0 when it was last started.

[0094] In addition, a rate threshold Vs is set to characterize the magnitude of the temperature change rate.

[0095] After the compressor 14 is controlled to start running at the speed N0 of the last startup, the compartment temperature is detected to calculate the temperature change rate V. When the temperature change rate V≤Vs, it indicates that the heat load in the current storage room cools down quickly, and the current speed of the compressor 14 is increased by the first speed adjustment step r1 every time the first preset time △t1 passes, until the preset maximum speed is reached. When the temperature change rate V>Vs, it indicates that the heat load in the current storage room cools down slowly, and the current speed of the compressor 14 is increased by the second speed adjustment step r2 every time the first preset time △t1 passes, until the preset maximum speed is reached, where r1>r2.

[0096] See also Figure 4 , is a schematic diagram of a third working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention, and step S14 further includes:

[0097] When the door opening time is less than or equal to a first door opening time threshold, and the weight change value is greater than the first weight threshold, calculating a target speed according to the historical speed and the weight change value;

[0098] Controlling the compressor to start directly, and running at the target speed after starting;

[0099] After the compressor starts running, the speed of the compressor is increased according to the second speed adjustment step with a second preset time length as an adjustment period until a preset maximum speed is reached; wherein the second preset time length is shorter than the first preset time length.

[0100] The calculating the target speed according to the historical speed and the weight change value includes:

[0101] According to the historical speed and the weight change value, the target speed is calculated by the following calculation formula:

[0102]

[0103] Wherein, N is the target speed, N0 is the historical speed, M1 and M2 are the weights of the items before and after the door is opened, ΔN is the preset unit speed adjustment value, and ΔM is the unit weight value.

[0104] In an embodiment of the present invention, when the door opening time T1≤t1 and the weight change value M2-M1>ΔM1, it indicates that the door opening time is short and the user has stored more items, which has a smaller impact on the cooling capacity in the storage room, but is slightly larger than the previous situation. At this time, the compressor 14 is controlled to start running directly, and after starting up, the compressor 14 runs at the target speed N calculated with reference to the speed N0 when it was last started.

[0105] Next, after the compressor 14 is controlled to start running, the current speed of the compressor 14 is increased by a second speed adjustment step r2 every second preset time Δt2 until the preset maximum speed is reached, wherein Δt2<Δt1.

[0106] For example, the unit of the compressor speed is RPM, the unit of the item weight is kg, and the first door opening time threshold t1=20s, the first weight threshold ΔM1=1kg, the rate threshold Vs=0.05, the first preset time Δt1=1h, the second preset time Δt2=0.5h, the first speed adjustment step r1=200RPM, the second speed adjustment step r2=100RPM, the unit speed adjustment value ΔN is 100RPM, and the unit weight value ΔM is 1kg. After determining that the refrigeration cabinet door is opened, the control The compressor stops running. After judging that the refrigeration cabinet door is closed, if the weight sensor detects the weight change value before and after the door is opened, M2-M1≤1kg, the refrigeration system will be turned on next time according to the thermostat control. After the refrigeration system is turned on, the speed of the compressor will run according to the speed N0 when it was turned on last time. When V≤0.05, the speed of the compressor will be increased by 200RPM every hour until the maximum speed; when V<0.05, the speed of the compressor will be increased by 100RPM every hour until the maximum speed. If the weight change value M2-M1>1kg, the refrigeration system will be turned on directly, and the speed of the compressor will run according to the speed N0+100*(M2-M1) / 1kg when it was turned on last time. The speed of the compressor will be increased by 100RPM every 0.5h until the maximum speed.

[0107] It should be noted that in the above scenario, the values ​​of the first door opening time threshold t1, the first weight threshold ΔM1, the rate threshold Vs, the first preset time Δt, the second preset time Δt2, the first speed adjustment step r1, the second speed adjustment step r2, the unit speed adjustment value ΔN and the unit weight value ΔM are only optional implementation methods and can be set according to the actual application situation during actual application. The above scenario does not constitute a limitation of the present invention.

[0108] By adopting the technical means of the embodiments of the present invention, it is proposed to control the operating state and operating parameters of the compressor when the door is opened for a short time and the weight change value of the items stored in the storage compartment is small or large. This can enable the food to be cooled quickly after being placed in the refrigerator, ensuring that water loss is minimized, ensuring the nutrition and freshness of the food, improving the storage quality of the food, and achieving energy-saving effects.

[0109] As a preferred implementation, the embodiment of the present invention is further implemented on the basis of the above embodiment. In the second optional implementation, see Figure 5 , is a schematic diagram of a fourth working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention, step S14, comprising:

[0110] When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is less than the second weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and after startup, it runs according to the historical speed; wherein the historical speed is the speed of the compressor when it is in the startup state in the previous start-stop cycle; the first door opening time threshold is less than the second door opening time threshold;

[0111] Detecting the startup operation time of the compressor after the door is closed;

[0112] When the startup operation time is greater than the preset operation time threshold, if the temperature change rate is less than or equal to the preset rate threshold, the speed of the compressor is adjusted to the preset maximum speed; if the temperature change rate is greater than the preset rate threshold, the speed of the compressor is increased according to the third speed adjustment step with a third preset time as the adjustment period until the preset maximum speed is reached; wherein the preset operation time threshold is greater than the historical startup time, and the historical startup time is the startup time of the compressor in the previous start-stop cycle;

[0113] When the startup operation time is less than or equal to a preset operation time threshold, the current rotation speed of the compressor is maintained unchanged.

[0114] In the embodiment of the present invention, the first door opening time threshold t1 is preset to characterize the shorter opening duration of the refrigeration cabinet door, and the second door opening time threshold t2 is preset to characterize the longer opening duration of the refrigeration cabinet door. In addition, the first weight threshold ΔM1 is preset to characterize the boundary between the user taking out items or storing a small amount of items and storing a large amount of items after opening the door, and the second weight threshold ΔM2 is preset to characterize the boundary between the user taking out and putting items after opening the door, wherein ΔM1>0, ΔM2≤0.

[0115] When the door opening time t1<T1≤t2, and the weight change value M2-M1<ΔM2, it indicates that the door is opened for a slightly longer time, and the user is likely to take out items, which has little impact on the cooling capacity in the storage room. At this time, the compressor 14 is controlled to start with reference to the startup temperature condition triggered by the thermostat, and after startup, the compressor 14 runs with reference to the speed N0 when it was last started.

[0116] In addition, a preset operating duration threshold is set to characterize the operating duration of the compressor 14 after the refrigeration cabinet door 12 is closed. The preset operating duration threshold is calculated based on the sum of the startup duration T2 of the compressor 14 in the previous start-stop cycle and the preset startup duration difference △T, that is, the preset operating duration threshold is T2+△T, where △T>0.

[0117] After the compressor 14 is controlled to start running at the speed N0 of the last startup, the startup running time T3 of the compressor 14 after the refrigeration cabinet door body 12 is closed is calculated in real time, and the compartment temperature is detected to calculate the temperature change rate V. When T3≤T2+△T, the current speed N0 of the compressor is maintained unchanged; when T3>T2+△T, if the temperature change rate V≤Vs, it indicates that the heat load in the current storage room is cooled down quickly, until the current speed of the compressor 14 is increased to the preset maximum speed. If the temperature change rate V>Vs, it indicates that the heat load in the current storage room is cooled down slowly, then the current speed of the compressor 14 is increased by the third speed adjustment step r3 every third preset time △t3 until the preset maximum speed is reached.

[0118] See also Figure 6 , is a schematic diagram of a fifth working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention, step S14 further includes:

[0119] When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is greater than or equal to the second weight threshold and less than or equal to the first weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and to run according to the historical speed after starting; wherein the first weight threshold is greater than the second weight threshold;

[0120] After the compressor starts running, the speed of the compressor is increased according to the third speed adjustment step length with the third preset time length as the adjustment period until the preset maximum speed is reached.

[0121] In the embodiment of the present invention, when the door opening time t1<T1≤t2, and the weight change value ΔM2≤M2-M1≤ΔM1, it indicates that the door opening time is slightly longer at this time, and the user stores a small amount of items, which has a slightly greater impact on the cooling capacity in the storage room. At this time, the compressor 14 is controlled to start with reference to the start-up temperature condition triggered by the thermostat, and after starting, the compressor 14 runs with reference to the speed N0 at the last start-up. After the compressor 14 is controlled to start and run according to the speed N0 at the last start-up, the current speed of the compressor 14 is increased by the third speed adjustment step r3 every third preset time Δt3 until the preset maximum speed is reached.

[0122] See also Figure 7 , is a schematic diagram of a sixth working process executed by the controller of the refrigeration cabinet in an embodiment of the present invention, step S14 further includes:

[0123] When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is greater than the first weight threshold, the target speed is calculated according to the historical speed and the weight change value;

[0124] Controlling the compressor to start directly, and running at the target speed after starting;

[0125] After the compressor starts running, the speed of the compressor is increased according to the third speed adjustment step with a third preset time length as the adjustment period until a preset maximum speed is reached.

[0126] Preferably, the calculating the target speed according to the historical speed and the weight change value includes:

[0127] According to the historical speed and the weight change value, the target speed is calculated by the following calculation formula:

[0128]

[0129] Wherein, N is the target speed, N0 is the historical speed, M1 and M2 are the weights of the items before and after the door is opened, ΔN is the preset unit speed adjustment value, and ΔM is the unit weight value.

[0130] In the embodiment of the present invention, when the door opening time t1<T1≤t2, and the weight change value M2-M1>ΔM1, it indicates that the door opening time is slightly longer, and the user stores more items, which has a great impact on the cooling capacity in the storage room. At this time, the compressor 14 is controlled to start running directly, and after starting, the compressor 14 runs at the target speed N calculated with reference to the speed N0 when it was last started. Then, after the compressor 14 is controlled to start running, the current speed of the compressor 14 is increased by the third speed adjustment step r3 every third preset time Δt3 until the preset maximum speed is reached.

[0131] As an example, taking the first door opening time threshold t1=20s, the second door opening time threshold t2=3min, the first weight threshold ΔM1=1kg, the second weight threshold ΔM2=0, the rate threshold Vs=0.05, the startup time difference △T=1h, the third preset time △t3=0.5h, the third speed adjustment step r3=200RPM, the unit speed adjustment value ΔN is 100RPM, and the unit weight value ΔM is 1kg, after determining that the refrigeration cabinet door is open, the compressor is controlled to stop running. After determining that the refrigeration cabinet door is closed, when the door opening time is 20s<T≤3min, if the weight sensor detects the weight change value M2-M1<0kg before and after the door opening, the refrigeration system will be started with reference to the thermostat control next time. After the refrigeration system is started, the speed of the compressor will run with reference to the speed N0 when it was last started. Detect the startup time T3 of the compressor after closing the door. When T3≤T2+1h, it indicates that the startup time of the compressor after closing the door is not long, and the speed of the compressor remains unchanged. When T3>T2+1h, it indicates that the startup time of the compressor after closing the door is long. Then further judge the temperature change rate. If V≤0.05, directly increase the speed of the compressor to the maximum speed; if V>0.05, increase the speed of the compressor by 200RPM every 0.5h until the maximum speed.

[0132] If the weight change value is 0≤M2-M1≤1kg, the refrigeration system will be controlled by the thermostat the next time it is turned on. After the refrigeration system is turned on, the speed of the compressor will run according to the speed N0 when it was turned on last time. After that, the speed of the compressor will increase by 200RPM every 0.5h until the maximum speed.

[0133] If the weight change value M2-M1>1kg, the refrigeration system is directly turned on, and the speed of the compressor is run according to the last startup speed N0+100*(M2-M1) / 1kg. After that, the speed of the compressor increases by 200RPM every 0.5h until it reaches the maximum speed.

[0134] It should be noted that in the above scenario, the values ​​of the first door opening time threshold t1, the second preset time t2, the first weight threshold ΔM1, the second weight threshold ΔM2, the rate threshold Vs, the start time difference △T, the third preset time △t3, the third speed adjustment step r3, the unit speed adjustment value ΔN and the unit weight value ΔM are only optional implementation methods. In actual application, they can be set according to the actual application situation. The above scenario does not constitute a limitation of the present invention.

[0135] By adopting the technical means of the embodiments of the present invention, it is proposed to control the operating state and operating parameters of the compressor under three conditions: small, moderate and large weight changes of the items stored in the storage compartment when the door is opened for a long time. This can enable the food to be cooled quickly after being placed in the refrigerator, ensuring that water loss is minimized, ensuring the nutrition and freshness of the food, improving the storage quality of the food, and achieving energy-saving effects.

[0136] As a preferred implementation, the embodiment of the present invention is further implemented on the basis of the above embodiment. In the third optional implementation, see Figure 8 , is a seventh working process diagram executed by the controller of the refrigeration cabinet in an embodiment of the present invention, step S14, comprising:

[0137] When the door opening time is greater than a second door opening time threshold, the compressor is controlled to start directly and run at a preset maximum speed until the compressor is controlled to stop when a preset shutdown temperature condition is met.

[0138] In the embodiment of the present invention, a second door opening time threshold t2 is preset to characterize a longer opening duration of the refrigeration cabinet door. When the door opening time t1>t2, it indicates that the door opening time is very long at this time, and whether the user is storing or taking out items, the cooling capacity in the storage room is greatly affected. At this time, the compressor 14 is controlled to start running directly, and after starting, the compressor 14 runs at a preset maximum speed until it stops.

[0139] As an example, taking the second door opening time threshold t2=3min as an example, after determining that the refrigeration cabinet door is open, the compressor is controlled to stop running. After determining that the refrigeration cabinet door is closed, if the door opening time T>3min, the compressor is directly started and runs directly at the highest speed until it stops.

[0140] By adopting the technical means of the embodiments of the present invention, it is proposed to control the operating state and operating parameters of the compressor when the door is opened for a long time, so that the food can be cooled quickly after being placed in the refrigerator, ensuring that water loss is minimized, ensuring the nutrition and freshness of the food, improving the storage quality of the food, and achieving energy-saving effects.

[0141] See also Fig. 9 , is a schematic diagram of the eighth working process executed by the controller of the refrigeration cabinet in the embodiment of the present invention. The embodiment of the present invention provides the most preferred implementation method for the controller to control the operation of the compressor. Please refer to the above embodiment for the specific implementation process, which will not be repeated here.

[0142] As a preferred implementation, the present invention is further implemented on the basis of the above-mentioned embodiments. Fig.10, is a second structural schematic diagram of a refrigeration cabinet provided in an embodiment of the present invention, wherein the refrigeration cabinet further includes a human body sensor 18, wherein the human body sensor 18 is disposed on the door body, for example, on a door handle of the door body, and is configured to be triggered when human activities are detected within a preset sensing range, and to send a trigger signal to the controller 17.

[0143] Then the controller 17 is also used for:

[0144] When the human sensing sensor is triggered and the weight of the object changes, it is determined that the door is detected to be opened;

[0145] After the door is detected to be opened, when the weight of the object does not change within a fourth preset time period, it is determined that the door is detected to be closed.

[0146] In the embodiment of the present invention, the weight sensor 15 and the human body sensor 18 are optionally detected every 5 seconds. When the user approaches the refrigerator, the human body sensor 18 is triggered. At this time, the controller 17 collects the weight of the items according to the weight sensor 15, and detects whether the weight of the items changes. If it changes, it is determined that the door is open. Afterwards, when the controller 17 detects that the weight of the items collected by the weight sensor 14 for three consecutive times has not changed, it is determined that the door is closed, and the time point of the first collection is the door closing time point.

[0147] An embodiment of the present invention further provides an operation control method of a refrigeration cabinet, the refrigeration cabinet comprising:

[0148] Box;

[0149] A door body, arranged at the opening of the box body;

[0150] A storage compartment, arranged in the box body, for storing items;

[0151] A weight sensor is provided in the storage compartment and is used to detect the weight of the stored items;

[0152] A temperature sensor is provided in the storage compartment and is used to detect the compartment temperature;

[0153] A compressor, disposed in the box, for realizing refrigerant circulation;

[0154] The method comprises steps S21 to S24:

[0155] S21, when it is detected that the door is opened, controlling the compressor to stop running;

[0156] S22, calculating a weight change value according to the weight of the items before and after the door is opened detected by the weight sensor;

[0157] S23, calculating the temperature change rate according to the compartment temperature detected by the temperature sensor;

[0158] S24. After detecting that the door body is closed, controlling the operating state and operating parameters of the compressor according to the door opening time, the weight change value and the temperature change rate.

[0159] By adopting the technical means of the embodiment of the present invention, a weight sensor and a temperature sensor are arranged in the storage room of the refrigerator. By monitoring the weight change value and temperature change rate of the items stored in the refrigerator, the operation of the compressor is controlled in combination with the door opening and closing time. The temperature change rate can characterize the temperature reduction speed, and the storage heat load can be identified in time, so that the food can be cooled quickly after being placed in the refrigerator, ensuring that water loss is minimized, ensuring the nutrition and freshness of the food, improving the storage quality of the food, and thus improving the user experience.

[0160] As a preferred embodiment, the operating state and operating parameters of the compressor are controlled according to the door opening time length, the weight change value and the temperature change rate of the door body, including:

[0161] When the door opening time is less than or equal to the first door opening time threshold, and the weight change value is less than or equal to the first weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and after starting, it runs according to the historical speed; wherein the historical speed is the speed of the compressor when it is in the startup state in the previous start-stop cycle;

[0162] After the compressor starts running, when the temperature change rate is less than or equal to a preset rate threshold, the speed of the compressor is increased according to a first speed adjustment step with a first preset time length as an adjustment period until a preset maximum speed is reached;

[0163] When the temperature change rate is greater than the preset rate threshold, the speed of the compressor is increased according to the second speed adjustment step with a first preset time length as the adjustment period until the preset maximum speed is reached; wherein the first speed adjustment step length is greater than the second speed adjustment step length.

[0164] Preferably, it also includes:

[0165] When the door opening time is less than or equal to a first door opening time threshold, and the weight change value is greater than the first weight threshold, calculating a target speed according to the historical speed and the weight change value;

[0166] Controlling the compressor to start directly, and running at the target speed after starting;

[0167] After the compressor starts running, the speed of the compressor is increased according to the second speed adjustment step with a second preset time length as an adjustment period until a preset maximum speed is reached; wherein the second preset time length is shorter than the first preset time length.

[0168] in,

[0169] According to the historical speed and the weight change value, the target speed is calculated by the following calculation formula:

[0170]

[0171] Wherein, N is the target speed, N0 is the historical speed, M1 and M2 are the weights of the items before and after the door is opened, ΔN is the preset unit speed adjustment value, and ΔM is the unit weight value.

[0172] As a preferred embodiment, the operating state and operating parameters of the compressor are controlled according to the door opening time length, the weight change value and the temperature change rate of the door body, including:

[0173] When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is less than the second weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and after startup, it runs according to the historical speed; wherein the historical speed is the speed of the compressor when it is in the startup state in the previous start-stop cycle; the first door opening time threshold is less than the second door opening time threshold;

[0174] Detecting the startup operation time of the compressor after the door is closed;

[0175] When the startup operation time is greater than the preset operation time threshold, if the temperature change rate is less than or equal to the preset rate threshold, the speed of the compressor is adjusted to the preset maximum speed; if the temperature change rate is greater than the preset rate threshold, the speed of the compressor is increased according to the third speed adjustment step with a third preset time as the adjustment period until the preset maximum speed is reached; wherein the preset operation time threshold is greater than the historical startup time, and the historical startup time is the startup time of the compressor in the previous start-stop cycle;

[0176] When the startup operation time is less than or equal to a preset operation time threshold, the current rotation speed of the compressor is maintained unchanged.

[0177] Preferably, the controlling the operating state and operating parameters of the compressor according to the door opening time length, the weight change value and the temperature change rate of the door body further includes:

[0178] When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is greater than or equal to the second weight threshold and less than or equal to the first weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and to run according to the historical speed after starting; wherein the first weight threshold is greater than the second weight threshold;

[0179] After the compressor starts running, the speed of the compressor is increased according to the third speed adjustment step length with the third preset time length as the adjustment period until the preset maximum speed is reached.

[0180] Preferably, it also includes:

[0181] When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is greater than the first weight threshold, the target speed is calculated according to the historical speed and the weight change value;

[0182] Controlling the compressor to start directly, and running at the target speed after starting;

[0183] After the compressor starts running, the speed of the compressor is increased according to the third speed adjustment step with a third preset time length as the adjustment period until a preset maximum speed is reached.

[0184] As a preferred embodiment, the operating state and operating parameters of the compressor are controlled according to the door opening time length, the weight change value and the temperature change rate of the door body, including:

[0185] When the door opening time is greater than a second door opening time threshold, the compressor is controlled to start directly and run at a preset maximum speed until the compressor is controlled to stop when a preset shutdown temperature condition is met.

[0186] The refrigerating cabinet further comprises a human body sensor, which is arranged on the door body and is used to be triggered when detecting human activities within a preset sensing range;

[0187] The method further includes:

[0188] When the human sensing sensor is triggered and the weight of the object changes, it is determined that the door is detected to be opened;

[0189] After the door is detected to be opened, when the weight of the object does not change within a fourth preset time period, it is determined that the door is detected to be closed.

[0190] It should be noted that the operation control method of a refrigeration cabinet provided in an embodiment of the present invention is identical to all process steps executed by a controller of a refrigeration cabinet in the above embodiment, and the working principles and beneficial effects of the two correspond one to one, so they will not be described in detail.

[0191] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0192] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigeration cabinet, characterized in that: include: Box; A door body, arranged at the opening of the box body; A storage compartment, arranged in the box body, for storing items; A weight sensor is provided in the storage compartment and is used to detect the weight of the stored items; A temperature sensor is provided in the storage compartment and is used to detect the compartment temperature; A compressor, disposed in the box, for realizing refrigerant circulation; Controller for: When it is detected that the door is opened, the compressor is controlled to stop running; Calculating a weight change value based on the weight of the items detected by the weight sensor before and after the door is opened; Calculating the temperature change rate according to the compartment temperature detected by the temperature sensor; After detecting that the door body is closed, the operating state and operating parameters of the compressor are controlled according to the door opening time length, the weight change value and the temperature change rate of the door body.

2. The refrigerating cabinet according to claim 1, characterized in that: The controlling the operating state and operating parameters of the compressor according to the door opening time length, the weight change value and the temperature change rate of the door body comprises: When the door opening time is less than or equal to the first door opening time threshold, and the weight change value is less than or equal to the first weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and after starting, it runs according to the historical speed; wherein the historical speed is the speed of the compressor when it is in the startup state in the previous start-stop cycle; After the compressor starts running, when the temperature change rate is less than or equal to a preset rate threshold, the speed of the compressor is increased according to a first speed adjustment step with a first preset time length as an adjustment period until a preset maximum speed is reached; When the temperature change rate is greater than the preset rate threshold, the speed of the compressor is increased according to the second speed adjustment step with a first preset time length as the adjustment period until the preset maximum speed is reached; wherein the first speed adjustment step length is greater than the second speed adjustment step length.

3. The refrigerating cabinet according to claim 2, characterized in that: The method of controlling the operating state and operating parameters of the compressor according to the door opening time, the weight change value and the temperature change rate of the door body further includes: When the door opening time is less than or equal to a first door opening time threshold, and the weight change value is greater than the first weight threshold, calculating a target speed according to the historical speed and the weight change value; Controlling the compressor to start directly, and running at the target speed after starting; After the compressor starts running, the speed of the compressor is increased according to the second speed adjustment step with a second preset time length as an adjustment period until a preset maximum speed is reached; wherein the second preset time length is shorter than the first preset time length.

4. The refrigerating cabinet according to claim 3, characterized in that: The calculating the target speed according to the historical speed and the weight change value includes: According to the historical speed and the weight change value, the target speed is calculated by the following calculation formula: Wherein, N is the target speed, N0 is the historical speed, M1 and M2 are the weights of the items before and after the door is opened, ΔN is the preset unit speed adjustment value, and ΔM is the unit weight value.

5. The refrigerating cabinet according to claim 1, characterized in that: The controlling the operating state and operating parameters of the compressor according to the door opening time length, the weight change value and the temperature change rate of the door body comprises: When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is less than the second weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and after startup, it runs according to the historical speed; wherein the historical speed is the speed of the compressor when it is in the startup state in the previous start-stop cycle; the first door opening time threshold is less than the second door opening time threshold; Detecting the startup operation time of the compressor after the door is closed; When the startup operation time is greater than the preset operation time threshold, if the temperature change rate is less than or equal to the preset rate threshold, the speed of the compressor is adjusted to the preset maximum speed; if the temperature change rate is greater than the preset rate threshold, the speed of the compressor is increased according to the third speed adjustment step with a third preset time as the adjustment period until the preset maximum speed is reached; wherein the preset operation time threshold is greater than the historical startup time, and the historical startup time is the startup time of the compressor in the previous start-stop cycle; When the startup operation time is less than or equal to a preset operation time threshold, the current rotation speed of the compressor is maintained unchanged.

6. The refrigerating cabinet according to claim 5, characterized in that: The method of controlling the operating state and operating parameters of the compressor according to the door opening time, the weight change value and the temperature change rate of the door body further includes: When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is greater than or equal to the second weight threshold and less than or equal to the first weight threshold, the compressor is controlled to start when the preset startup temperature condition is met, and to run according to the historical speed after starting; wherein the first weight threshold is greater than the second weight threshold; After the compressor starts running, the speed of the compressor is increased according to the third speed adjustment step length with the third preset time length as the adjustment period until the preset maximum speed is reached.

7. The refrigerating cabinet according to claim 6, characterized in that: The method of controlling the operating state and operating parameters of the compressor according to the door opening time, the weight change value and the temperature change rate of the door body further includes: When the door opening time is greater than the first door opening time threshold and less than or equal to the second door opening time threshold, and the weight change value is greater than the first weight threshold, the target speed is calculated according to the historical speed and the weight change value; Controlling the compressor to start directly, and running at the target speed after starting; After the compressor starts running, the speed of the compressor is increased according to the third speed adjustment step with a third preset time length as the adjustment period until a preset maximum speed is reached.

8. The refrigerating cabinet according to claim 1, characterized in that: The controlling the operating state and operating parameters of the compressor according to the door opening time length, the weight change value and the temperature change rate of the door body comprises: When the door opening time is greater than a second door opening time threshold, the compressor is controlled to start directly and run at a preset maximum speed until the compressor is controlled to stop when a preset shutdown temperature condition is met.

9. The refrigerating cabinet according to claim 1, characterized in that: The refrigerating cabinet further comprises a human body sensor, which is arranged on the door body and is used to be triggered when detecting human activities within a preset sensing range; Then the controller is also used for: When the human sensing sensor is triggered and the weight of the object changes, it is determined that the door is detected to be opened; After the door is detected to be opened, when the weight of the object does not change within a fourth preset time period, it is determined that the door is detected to be closed.

10. A method for controlling the operation of a refrigeration cabinet, characterized in that: The refrigeration cabinet comprises: Box; A door body, arranged at the opening of the box body; A storage compartment, arranged in the box body, for storing items; A weight sensor is provided in the storage compartment and is used to detect the weight of the stored items; A temperature sensor is provided in the storage compartment and is used to detect the compartment temperature; A compressor, disposed in the box, for realizing refrigerant circulation; The method comprises: When it is detected that the door is opened, the compressor is controlled to stop running; Calculating a weight change value based on the weight of the items detected by the weight sensor before and after the door is opened; Calculating the temperature change rate according to the compartment temperature detected by the temperature sensor; After detecting that the door body is closed, the operating state and operating parameters of the compressor are controlled according to the door opening time length, the weight change value and the temperature change rate of the door body.

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