Refrigerator and method for controlling operation of refrigerator

Abstract

The application discloses a refrigeration cabinet and a running control method of the refrigeration cabinet. The method comprises the following steps: setting a weight sensor for detecting the weight of stored goods and a temperature sensor for detecting the temperature of a chamber in the refrigeration cabinet. When the door is detected to be opened, the compressor is controlled to stop running. The weight change value is calculated according to the weight of goods detected by the weight sensor before and after the door is opened. The temperature change rate is calculated according to the temperature of the chamber detected by the temperature sensor. After the door is detected to be closed, the running state and the running parameter of the compressor are controlled according to the door opening time, the weight change value and the temperature change rate. The application can effectively combine the opening and closing actions, the weight change of food and the temperature change of the chamber to control the rotating speed of the compressor, improve the cooling speed and improve the storage quality of food.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration, in particular to a refrigeration cabinet and a running control method of the refrigeration cabinet. BACKGROUND

[0002] With the increasing improvement of living standards, users have increasingly demanding requirements for the storage conditions of foodstuffs. Foodstuffs need to be quickly cooled in a refrigeration cabinet to minimize water loss and ensure a high freshness level after being taken out. Currently, variable frequency refrigeration cabinets are increasingly popular. The biggest feature of a variable frequency refrigeration cabinet is that the speed of the compressor is variable. By adjusting the speed of the compressor, on-demand refrigeration of the refrigeration cabinet is achieved.

[0003] However, the present application has found that the prior art at least has the following problems: Currently, the speed of the compressor of a refrigeration cabinet is controlled by obtaining the ambient temperature and combining the user-set temperature level. When the foodstuffs change during use of the refrigeration cabinet, the refrigeration effect and the total amount of foodstuffs are likely to be mismatched, which affects the refrigeration effect of the refrigeration cabinet and the storage effect of the foodstuffs. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a refrigeration cabinet and a running control method of the refrigeration cabinet, which can effectively control the speed of the compressor in combination with the opening and closing of the door, the change in the weight of the foodstuffs and the change in the temperature of the chamber, improve the cooling speed and improve the storage quality of the foodstuffs.

[0005] To achieve the above purpose, the embodiments of the present application provide a refrigeration cabinet, comprising:

[0006] a cabinet body;

[0007] a door body arranged at an opening of the cabinet body;

[0008] a storage chamber arranged in the cabinet body and used for storing articles;

[0009] a weight sensor arranged in the storage chamber and used for detecting the weight of the stored articles;

[0010] a temperature sensor arranged in the storage chamber and used for detecting the temperature of the chamber;

[0011] a compressor arranged in the cabinet body and used for realizing the circulation of refrigerant;

[0012] a controller configured to:

[0013] control the compressor to stop running when it is detected that the door body is opened;

[0014] calculate a weight change value according to the weight of the articles detected by the weight sensor before and after the door body is opened;

[0015] calculating a temperature change rate according to the temperature detected by the temperature sensor;

[0016] controlling an operation state and an operation parameter of the compressor according to the door opening duration, the weight change value and the temperature change rate after detecting that the door body is closed.

[0017] As an improvement of the above scheme, the controlling an operation state and an operation parameter of the compressor according to the door opening duration, the weight change value and the temperature change rate comprises:

[0018] when the door opening duration is less than or equal to a first door opening duration threshold and the weight change value is less than or equal to a first weight threshold, controlling the compressor to start when a preset starting temperature condition is met, and running at a historical speed after starting; wherein the historical speed is a speed of the compressor in a last start-stop cycle when the compressor is in a starting state;

[0019] when the temperature change rate is less than or equal to a preset rate threshold after the compressor starts running, taking a first preset duration as an adjustment period, and increasing the speed of the compressor by a first speed adjustment step until a preset maximum speed is reached;

[0020] when the temperature change rate is greater than the preset rate threshold, taking the first preset duration as the adjustment period, and increasing the speed of the compressor by a second speed adjustment step until the preset maximum speed is reached; wherein the first speed adjustment step is greater than the second speed adjustment step.

[0021] As an improvement of the above scheme, the controlling an operation state and an operation parameter of the compressor according to the door opening duration, the weight change value and the temperature change rate further comprises:

[0022] when the door opening duration is less than or equal to a first door opening duration 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, taking a second preset duration as the adjustment period, and increasing the speed of the compressor by the second speed adjustment step until the preset maximum speed is reached; wherein the second preset duration is less than the first preset duration.

[0025] As an improvement of the above scheme, the calculating a target speed according to the historical speed and the weight change value comprises:

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

[0027]

[0028] wherein, N is the target rotating speed, N0 is the historical rotating speed, M1 and M2 are the weights of the articles before and after the door body is opened respectively, ΔN is a preset unit rotating speed adjustment value, and ΔM is a unit weight value.

[0029] As an improvement of the above-mentioned scheme, the control of the operating state and operating parameter of the compressor according to the door opening duration, the weight change value and the temperature change rate comprises:

[0030] when the door opening duration is greater than a first door opening duration threshold and less than or equal to a second door opening duration threshold, and the weight change value is less than a second weight threshold, the compressor is controlled to start when a preset starting temperature condition is met, and to operate at a historical rotating speed after starting; wherein the historical rotating speed is the rotating speed of the compressor in the last start-stop cycle when the compressor is in the starting state; the first door opening duration threshold is less than the second door opening duration threshold;

[0031] detecting a starting operating duration of the compressor after the door body is closed;

[0032] when the starting operating duration is greater than a preset operating duration threshold, if the temperature change rate is less than or equal to a preset rate threshold, the rotating speed of the compressor is adjusted to a preset maximum rotating speed; if the temperature change rate is greater than the preset rate threshold, the rotating speed of the compressor is adjusted upward by a third rotating speed adjustment step in a third preset duration as an adjustment period until the preset maximum rotating speed is reached; wherein the preset operating duration threshold is greater than a historical starting duration, and the historical starting duration is the starting duration of the compressor in the last start-stop cycle;

[0033] when the starting operating duration is less than or equal to the preset operating duration threshold, the current rotating speed of the compressor is maintained unchanged.

[0034] As an improvement of the above-mentioned scheme, the control of the operating state and operating parameter of the compressor according to the door opening duration, the weight change value and the temperature change rate further comprises:

[0035] when the door opening duration is greater than a first door opening duration threshold and less than or equal to a second door opening duration threshold, and the weight change value is greater than or equal to a second weight threshold and less than or equal to a first weight threshold, the compressor is controlled to start when a preset starting temperature condition is met, and to operate at a historical rotating speed after starting; wherein the first weight threshold is greater than the second weight threshold;

[0036] After the compressor starts to run, the third preset time length is taken as an adjustment cycle, and the rotating speed of the compressor is increased by a third rotating speed adjustment step until a preset highest rotating speed is reached.

[0037] As an improvement of the above scheme, the control of the operating state and operating parameter of the compressor according to the door opening time length, the weight change value and the temperature change rate further comprises:

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

[0039] The compressor is directly started, and runs at the target rotating speed after starting;

[0040] After the compressor starts to run, the third preset time length is taken as an adjustment cycle, and the rotating speed of the compressor is increased by a third rotating speed adjustment step until a preset highest rotating speed is reached.

[0041] As an improvement of the above scheme, the control of the operating state and operating parameter of the compressor according to the door opening time length, the weight change value and the temperature change rate further comprises:

[0042] When the door opening time length is greater than a second door opening time length threshold, the compressor is directly started and runs at a preset highest rotating speed until the compressor is stopped when a preset stop temperature condition is met.

[0043] As an improvement of the above scheme, the refrigerator further comprises a human body sensor, which is arranged on the door body and is triggered when detecting personnel activity in a preset sensing range;

[0044] Therefore, the controller is further configured to:

[0045] When the human body sensor is triggered and the weight of the object changes, it is determined that the door body is opened.

[0046] After detecting that the door body is opened, when the weight of the object does not change within a fourth preset time length, it is determined that the door body is closed.

[0047] The embodiment of the present application further provides a refrigerator operating control method, and the refrigerator comprises:

[0048] A cabinet;

[0049] A door body arranged at an opening of the cabinet;

[0050] A storage compartment arranged in the cabinet and used for storing objects;

[0051] a weight sensor arranged in the storage compartment for detecting the weight of the stored articles;

[0052] a temperature sensor arranged in the storage compartment for detecting the temperature of the compartment;

[0053] a compressor arranged in the cabinet for realizing refrigerant circulation;

[0054] The method comprises:

[0055] controlling the compressor to stop running when the door body is detected to be opened;

[0056] calculating a weight change value according to the weight of the articles detected by the weight sensor before and after the door body is opened;

[0057] calculating a temperature change rate according to the temperature of the compartment detected by the temperature sensor;

[0058] controlling the running state and the running parameter of the compressor according to the door opening duration, the weight change value and the temperature change rate after the door body is detected to be closed.

[0059] Compared with the prior art, the refrigeration cabinet and the operation control method of the refrigeration cabinet disclosed by the present application set a weight sensor for detecting the weight of the stored articles and a temperature sensor for detecting the temperature of the compartment in the storage compartment of the refrigeration cabinet. When the door body is detected to be opened, the compressor is controlled to stop running. A weight change value is calculated according to the weight of the articles detected by the weight sensor before and after the door body is opened. A temperature change rate is calculated according to the temperature of the compartment detected by the temperature sensor. After the door body is detected to be closed, the running state and the running parameter of the compressor are controlled according to the door opening duration, the weight change value and the temperature change rate. By using the technical means of the present application, the weight sensor and the temperature sensor are arranged in the storage compartment of the refrigeration cabinet. The weight change value and the temperature change rate of the articles stored in the refrigeration cabinet are monitored. The running of the compressor is controlled in combination with the door opening and closing time. The temperature change rate can represent the temperature reduction speed. The storage heat load is identified in time. The foodstuff can be quickly cooled after being placed in the refrigeration cabinet. The water loss is minimized. The nutrition and freshness of the foodstuff are ensured. The storage quality of the foodstuff is improved. The use experience of the user is improved. BRIEF DESCRIPTION OF DRAWINGS

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

[0061] Figure 2 is a first working process schematic view of a controller of the refrigeration cabinet in the embodiment of the present application;

[0062] Figure 3 is a second work flow diagram of a controller of a refrigeration cabinet in an embodiment of the present application;

[0063] Figure 4 is a third work flow diagram of a controller of a refrigeration cabinet in an embodiment of the present application;

[0064] Figure 5 is a fourth work flow diagram of a controller of a refrigeration cabinet in an embodiment of the present application;

[0065] Figure 6 is a fifth work flow diagram of a controller of a refrigeration cabinet in an embodiment of the present application;

[0066] Figure 7 is a sixth work flow diagram of a controller of a refrigeration cabinet in an embodiment of the present application;

[0067] Figure 8 is a seventh work flow diagram of a controller of a refrigeration cabinet in an embodiment of the present application;

[0068] Figure 9 is an eighth work flow diagram of a controller of a refrigeration cabinet in an embodiment of the present application;

[0069] Figure 10 is a second structure diagram of a refrigeration cabinet provided in an embodiment of the present application. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0071] Referring to Figure 1 is a first structure diagram of a refrigeration cabinet provided in an embodiment of the present application. The present application provides a refrigeration cabinet 10, which can be a refrigerator, a wine cabinet or a medicine cabinet, etc. The refrigeration cabinet 10 comprises a cabinet 11 and a door body 12 arranged at an opening of the cabinet 11 for opening and closing the cabinet 11. The refrigeration cabinet 10 further comprises at least one storage chamber 13, such as a refrigerating chamber and / or a freezing chamber, for storing items with preservation or freezing requirements. The refrigeration cabinet further comprises a refrigeration system for performing refrigeration operation of the refrigeration cabinet. The refrigeration cabinet performs refrigeration operation through the refrigeration system to provide cold energy transmission into the storage chamber so as to maintain the storage chamber in a constant low temperature state.

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

[0073] The compression process is that when the refrigerator power cord is plugged in and the refrigerator has a refrigeration demand, the compressor starts to work, the low-temperature and low-pressure refrigerant is sucked into the compressor cylinder, compressed into high-temperature and high-pressure superheated gas, and then discharged into the condenser. The condensation process is that the high-temperature and high-pressure refrigerant gas is cooled by the condenser, the temperature continuously decreases, and gradually becomes saturated vapor at room temperature and high pressure, and further cooled into saturated liquid, and the temperature no longer decreases, and the temperature at this time is called the condensation temperature. The pressure of the refrigerant in the entire condensation process is almost unchanged. The throttling process is that the saturated liquid refrigerant after condensation flows into the capillary tube through the drying filter to filter out water and impurities, and is throttled and decompressed by the capillary tube, and the refrigerant becomes wet vapor at room temperature and low pressure. The evaporation process is that then the evaporation in the evaporator starts to absorb heat to vaporize, not only reduces the temperature of the evaporator and its surroundings, but also makes the refrigerant into a low-temperature and low-pressure gas. The refrigerant coming out of the evaporator returns to the compressor again to repeat the above process, and the heat in the refrigerator is transferred to the air outside the box to achieve the purpose of refrigeration.

[0074] The refrigeration cabinet 10 further comprises a weight sensor 15 arranged in the storage compartment 13, specifically arranged below the article carrying position, for example, the bottom of the inner container of the storage compartment, and the weight sensor 15 is used for detecting the weight of the stored articles. The weight sensor 15 can be arranged to detect the weight of the articles in real time, or can be arranged to detect the weight of the articles once every certain time length, for example, 5s, which does not affect the beneficial effects obtained by the present application.

[0075] The refrigeration cabinet 10 further comprises a temperature sensor 16 arranged in the storage compartment 13, and the temperature sensor 16 is used for detecting the temperature of the storage compartment. Optionally, the temperature sensor 16 is an electronic temperature controller, and the temperature of the storage compartment is collected by the temperature sensing head of the electronic temperature controller.

[0076] The refrigeration cabinet 10 further comprises a controller 17, and the controller 17 is connected with the door body 12, the compressor 14, the weight sensor 15 and the temperature sensor 16, and is used at least for acquiring the collected data of the related sensors, monitoring the opening or closing state of the door body, and controlling the running state and running parameters of the compressor, etc.

[0077] Specifically, referring to Figure 2 is a first working process schematic diagram of the controller of the refrigeration cabinet in the embodiment of the present application, and the controller 17 is used for executing steps S11 to S14.

[0078] S11, stopping the compressor when the door is detected to be opened;

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

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

[0081] S14, controlling the operation state and operation parameter of the compressor according to the door opening time, the weight change value and the temperature change rate after the door is detected to be closed.

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

[0083]

[0084] Where Δt refers to the time taken to reduce the chamber temperature by 1K.

[0085] Further, the controller 17 detects the state of the door 12 in real time. When the door 12 is detected to be opened, the controller 17 controls the compressor 14 to stop running to reduce the energy consumption of the refrigerator cabinet during the opening of the door.

[0086] After the door is detected to be closed, the controller 17 determines the door opening time T1 of the door 12 and determines the operation state of the compressor 14 according to the currently calculated weight change value ΔM' and temperature change rate V. The operation 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 controller 17 determines the operation parameter of the compressor 14, which includes the rotation speed of the compressor.

[0087] By adopting the technical means of the embodiment of the present application, the weight sensor and the temperature sensor are arranged in the storage compartment of the refrigerator, the weight change value and the temperature change rate of the stored goods in the refrigerator are monitored, the running of the compressor is controlled in combination with the door opening time, the temperature change rate can represent the temperature reduction speed, the storage heat load is identified in time, the food can be quickly cooled after being placed in the refrigerator, the water loss is minimized, the nutrition and freshness of the food are ensured, the storage quality of the food is improved, and the use experience of the user is improved.

[0088] As a preferred embodiment, the embodiment of the present application is further implemented on the basis of the above-mentioned embodiment. In a first alternative embodiment, referring to Figure 3 is a second working process schematic diagram of the controller of the refrigerator in the embodiment of the present application. Step S14, that is, the running state and the running parameter of the compressor are controlled according to the door opening time, the weight change value and the temperature change rate, including:

[0089] When the door opening time is less than or equal to a first door opening time threshold, and the weight change value is less than or equal to a first weight threshold, the compressor is started when a preset starting temperature condition is met, and runs at a historical speed after starting; wherein the historical speed is the speed of the compressor in the last 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 adjusted upward by a first preset time as an adjustment period, and by a first speed adjustment step, 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 adjusted upward by a first preset time as an adjustment period, and by a second speed adjustment step, until a preset maximum speed is reached; wherein the first speed adjustment step is greater than the second speed adjustment step.

[0092] In the embodiment of the present application, the first door opening time threshold t1 is preset to represent the short opening duration of the door of the refrigerator. In addition, the weight change value is obtained by subtracting the weight of the goods before the door is opened from the weight of the goods after the door is opened, that is, it represents the change of the weight of the goods after the user uses the refrigerator. The first weight threshold ΔM1 is set to represent the boundary between taking out goods or storing a small amount of goods and storing a large amount of goods after the user opens the door, and the first weight threshold ΔM1 > 0.

[0093] When the door opening duration T1≤t1 and the weight change value M2-M1≤ΔM1, it indicates that the door opening duration is short, and the user only stores a small amount of goods or takes out goods, which has the least impact on the cold quantity in the storage chamber. At this time, the compressor 14 is started and runs according to the last start speed N0 under the reference of the start temperature condition of the temperature controller.

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

[0095] After the compressor 14 is started and runs according to the last start speed N0, the chamber 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 chamber cools down quickly. Therefore, the current speed of the compressor 14 is increased by a first speed adjustment step r1 every first preset time interval△t1 until the preset maximum speed is reached. When the temperature change rate V>Vs, it indicates that the heat load in the current storage chamber cools down slowly. Therefore, the current speed of the compressor 14 is increased by a second speed adjustment step r2 every first preset time interval△t1 until the preset maximum speed is reached, wherein r1>r2.

[0096] Referring to Figure 4 , FIG. 3 is a third working process schematic diagram of the controller of the refrigeration cabinet in the embodiment of the present application. Step S14 further includes:

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

[0098] The compressor is directly started and runs according to the target speed after starting;

[0099] After the compressor is started and runs, the speed of the compressor is adjusted upward according to the second speed adjustment step every second preset time interval until the preset maximum speed is reached. The second preset time interval is less than the first preset time interval.

[0100] The target speed is calculated according to the historical speed and the weight change value, including:

[0101] The target speed is calculated according to the historical speed and the weight change value 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 goods before and after the door body is opened, ΔN is a preset unit speed adjustment value, and ΔM is a unit weight value.

[0104] In the embodiment of the present application, when the door opening time T1≤t1 and the weight change value M2-M1>ΔM1, it indicates that the door opening time is relatively short and the user has stored more articles, which has a smaller influence on the cold quantity in the storage chamber than the previous case, but is slightly larger than the previous case. At this time, the compressor 14 is directly started and runs, and the target speed N of the compressor 14 is calculated with reference to the speed N0 of the last start.

[0105] Then, after the compressor 14 is started and runs, the current speed of the compressor 14 is increased by a second speed adjustment step r2 every second preset time interval At2 until the preset maximum speed is reached, wherein At2<At1.

[0106] For example, the speed unit of the compressor is RPM, the weight unit of the articles is kg, the first door opening time threshold t1 is 20s, the first weight threshold AM1 is 1kg, the speed threshold Vs is 0.05, the first preset time interval At1 is 1h, the second preset time interval At2 is 0.5h, the first speed adjustment step r1 is 200RPM, the second speed adjustment step r2 is 100RPM, the unit speed adjustment value AN is 100RPM, and the unit weight value AM is 1kg. After it is determined that the refrigerator door is opened, the compressor is stopped. After it is determined that the refrigerator door is closed, if the weight change value M2-M1≤1kg in the case of the door opening time T1≤20s, the refrigeration system is started with reference to the control of the temperature controller. After the refrigeration system is started, the speed of the compressor is run with reference to the speed N0 of the last start. When V≤0.05, the speed of the compressor is increased by 200RPM every 1h until the maximum speed. When V<0.05, the speed of the compressor is increased by 100RPM every 1h until the maximum speed. If the weight change value M2-M1>1kg, the refrigeration system is directly started, and the speed of the compressor is run with reference to the speed N0 of the last start + 100*(M2-M1) / 1kg. The speed of the compressor is increased by 100RPM every 0.5h until the maximum speed.

[0107] It should be noted that the values of the first door opening time threshold t1, the first weight threshold AM1, the speed threshold Vs, the first preset time interval At, the second preset time interval At2, the first speed adjustment step r1, the second speed adjustment step r2, the unit speed adjustment value AN and the unit weight value AM in the above scenario are only optional embodiments, which can be set according to actual application in actual application, and the above scenario does not constitute a limitation on the present application.

[0108] The technical means of the embodiment of the present application is adopted, the weight change value of the stored goods in the storage chamber is controlled in the two cases of being small and being large when the door opening time is short, the operation state and operation parameter of the compressor can be controlled, the food material can be quickly cooled after being placed in the refrigerator, the water loss is minimized, the nutrition and freshness of the food material are ensured, the storage quality of the food material is improved, and the energy saving effect is achieved.

[0109] As a preferred embodiment, the embodiment of the present application is further implemented on the basis of the above-mentioned embodiment, in the second optional embodiment, referring to Figure 5 , it is the fourth working process schematic diagram executed by the controller of the refrigerator in the embodiment of the present application, 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 started when the preset starting temperature condition is met, and the historical speed is used after starting; The speed of the compressor in the last start-stop cycle is the speed of the compressor in the last start-stop cycle; The first door opening time threshold is less than the second door opening time threshold;

[0111] Detect the starting running time of the compressor after the door body is closed;

[0112] When the starting running time is greater than the preset running 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 highest speed; if the temperature change rate is greater than the preset rate threshold, the third preset time is used as the adjustment period, and the speed of the compressor is adjusted by the third speed adjustment step until the preset highest speed is reached; The historical starting time is greater than the historical starting time, and the historical starting time is the starting time of the compressor in the last start-stop cycle;

[0113] When the starting running time is less than or equal to the preset running time threshold, the current speed of the compressor is maintained unchanged.

[0114] In the embodiment of the present application, the first door opening time threshold t1 is set to represent the short opening duration of the refrigerator door, and the second door opening time threshold t2 is set to represent the long opening duration of the refrigerator door. In addition, the first weight threshold AM1 is set to represent the boundary between taking out goods or storing a small amount of goods and storing a large amount of goods after opening the door, and the second weight threshold AM2 is set to represent the boundary between taking and storing goods after opening the door, wherein AM1>0, AM2≤0.

[0115] When the door opening duration t1 < T1 ≤ t2 and the weight change value M2-M1 < ΔM2, it indicates that the door opening duration is slightly long, and the user is likely to take out the goods, and the cold quantity in the storage compartment is less affected. At this time, the compressor 14 is started according to the starting temperature condition triggered by the temperature controller, and after starting, the compressor 14 operates according to the last starting speed N0.

[0116] In addition, a preset running duration threshold is set to represent the running duration of the compressor 14 after the refrigeration cabinet door body 12 is closed. The preset running duration threshold is calculated according to the sum of the last starting duration T2 of the compressor 14 in the last start-stop cycle and the preset starting duration difference ΔT, that is, the preset running duration threshold is T2+ΔT, and ΔT>0.

[0117] After the compressor 14 is started and runs according to the last starting speed N0, the starting running duration 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+ΔT, the current speed N0 of the compressor is maintained unchanged. When T3 > T2+ΔT, if the temperature change rate V ≤ Vs, it indicates that the heat load in the current storage compartment cools 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 compartment cools down slowly, and the current speed of the compressor 14 is increased by a third speed adjustment step r3 every third preset duration Δt3 until the preset maximum speed is reached.

[0118] Referring to Figure 6 is a fifth working process schematic diagram of the controller of the refrigeration cabinet in the embodiment of the application, step S14 further includes:

[0119] When the door opening duration is greater than the first door opening duration threshold and less than or equal to the second door opening duration 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 started when the preset starting temperature condition is met, and runs according to the historical speed after starting. The first weight threshold is greater than the second weight threshold.

[0120] After the compressor is started and runs, the speed of the compressor is adjusted upward by a third speed adjustment step as an adjustment period until a preset maximum speed is reached.

[0121] In the embodiment of the present application, when the door opening time t1 < T1 < t2 and the weight change value M2-M1 > AM1, it indicates that the door opening time is slightly long, and the user stores more goods, which greatly affects the cold quantity in the storage compartment. At this time, the compressor 14 is directly started and runs according to the target speed N calculated based on the last starting speed N0. Then, after the compressor 14 is started and runs, the current speed of the compressor 14 is increased by a third speed adjustment step r3 every third preset time interval At3 until the preset maximum speed is reached.

[0122] Referring to Figure 7 FIG. 14 is a schematic diagram of a sixth working process of the controller of the refrigeration cabinet in the embodiment of the present application, and 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, calculating a target speed according to the historical speed and the weight change value;

[0124] controlling the compressor to be directly started and run at the target speed;

[0125] after the compressor is started and runs, the speed of the compressor is adjusted upward by a third speed adjustment step every third preset time interval until the preset maximum speed is reached.

[0126] Preferably, the target speed is calculated according to the historical speed and the weight change value, including:

[0127] the target speed is calculated according to the historical speed and the weight change value 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 goods before and after the door is opened, AN is a preset unit speed adjustment value, and AM is a unit weight value.

[0130] In the embodiment of the present application, when the door opening time t1 < T1 < t2 and the weight change value M2-M1 > AM1, it indicates that the door opening time is slightly long, and the user stores more goods, which greatly affects the cold quantity in the storage compartment. At this time, the compressor 14 is directly started and runs according to the target speed N calculated based on the last starting speed N0. Then, after the compressor 14 is started and runs, the current speed of the compressor 14 is increased by a third speed adjustment step r3 every third preset time interval At3 until the preset maximum speed is reached.

[0131] As an example, taking the first door opening duration threshold t1 = 20s, the second door opening duration threshold t2 = 3min, the first weight threshold AM1 = 1kg, the second weight threshold AM2 = 0, the rate threshold Vs = 0.05, the start duration difference AT = 1h, the third preset duration At3 = 0.5h, the third speed adjustment step r3 = 200RPM, the unit speed adjustment value AN is 100RPM, and the unit weight value AM is 1kg as an example, after determining that the refrigerator door is opened, the compressor is stopped, after determining that the refrigerator door is closed, when the door opening time is 20s < T < = 3min, if the weight sensor detects that the weight change value M2-M1 < 0kg before and after the door is opened, the next time the refrigeration system is started, the temperature controller is referred to. After the refrigeration system is started, the speed of the compressor is referred to the speed N0 of the last start. When T3 < T2 + 1h, it is indicated that the time of the compressor starting after the door is closed is not long, and the speed of the compressor is maintained at the original speed. When T3 > T2 + 1h, it is indicated that the time of the compressor starting after the door is closed is long, and the temperature change rate is further judged. If V < 0.05, the speed of the compressor is directly increased to the highest speed; if V > 0.05, the speed of the compressor is increased by 200RPM every 0.5h until the highest speed.

[0132] If the weight change value 0 < M2-M1 < 1kg, the next time the refrigeration system is started, the temperature controller is referred to. After the refrigeration system is started, the speed of the compressor is referred to the speed N0 of the last start, and then the speed of the compressor is increased by 200RPM every 0.5h until the highest speed.

[0133] If the weight change value M2-M1 > 1kg, the refrigeration system is directly started, the speed of the compressor is referred to the speed N0 of the last start, and then the speed of the compressor is increased by 200RPM every 0.5h until the highest speed.

[0134] It should be noted that the values of the first door opening duration threshold t1, the second preset duration t2, the first weight threshold AM1, the second weight threshold AM2, the rate threshold Vs, the start duration difference AT, the third preset duration At3, the third speed adjustment step r3, the unit speed adjustment value AN and the unit weight value AM in the above scenario are only optional embodiments, which can be set according to actual application in actual application, and the above scenario does not constitute a limitation on the present application.

[0135] The technical means of the embodiment of the present application is adopted to propose the control of the running state and running parameter of the compressor in three cases of small, moderate and large weight change value of the stored goods in the storage compartment when the door is opened for a long time, so that the food materials can be quickly cooled after being placed in the refrigerator, the water loss is minimized, the nutrition and freshness of the food materials are ensured, the storage quality of the food materials is improved, and the energy saving effect is achieved.

[0136] As a preferred embodiment, the embodiment of the present application is further implemented on the basis of the above-mentioned embodiment, and in the third alternative embodiment, referring to Figure 8 Fig. 14 is a seventh working process schematic diagram of a controller of the refrigerator in the embodiment of the present application, and the steps S14 comprise:

[0137] When the door opening duration is greater than the second door opening duration threshold, the compressor is directly started and runs at a preset highest speed until the compressor is stopped when the preset stop temperature condition is met.

[0138] In the embodiment of the present application, the second door opening duration threshold t2 is set in advance to represent the long opening duration of the refrigerator door. When the door opening duration t1>t2, it indicates that the door opening duration is long, and whether the user is storing goods or taking out goods, the influence on the cold quantity in the storage compartment is large. At this time, the compressor 14 is directly started and runs at a preset highest speed after starting.

[0139] As an example, taking the second door opening duration threshold t2=3min as an example, after determining that the refrigerator door is opened, the compressor is stopped, and after determining that the refrigerator door is closed, if the door opening time T>3min, the compressor is directly started and runs at the highest speed until it is stopped.

[0140] The technical means of the embodiment of the present application is adopted to propose the control of the running state and running parameter of the compressor when the door is opened for a long time, so that the food materials can be quickly cooled after being placed in the refrigerator, the water loss is minimized, the nutrition and freshness of the food materials are ensured, the storage quality of the food materials is improved, and the energy saving effect is achieved.

[0141] Referring to Figure 9 Fig. 15 is an eighth working process schematic diagram of a controller of the refrigerator in the embodiment of the present application, and the embodiment of the present application provides the most preferred implementation of the running control of the controller on the compressor, and the specific implementation process is described above and will not be repeated here.

[0142] As a preferred embodiment, the embodiment of the present application is further implemented on the basis of the above-mentioned embodiment, referring to Figure 10Fig. 2 is a second structural schematic diagram of the refrigeration cabinet provided by the embodiment of the present application, and the refrigeration cabinet further comprises a human body sensor 18, which is arranged on the door body, for example, on the door handle of the door body, and is used for being triggered when detecting the presence of personnel activities in a preset sensing range and sending a trigger signal to the controller 17.

[0143] The controller 17 is further used for:

[0144] When the human body sensor is triggered and the weight of the article changes, it is determined that the door body is opened.

[0145] After detecting that the door body is opened, when the weight of the article does not change within a fourth preset time length, it is determined that the door body is closed.

[0146] In the embodiment of the present application, optionally, the weight sensor 15 and the human body sensor 18 are detected once every 5s, when the user approaches the refrigerator, the human body sensor 18 is triggered, at this time, the controller 17 collects the weight of the article according to the weight sensor 15, detects whether the weight of the article changes, if it changes, it is determined that the door body is opened. Then, when the controller 17 detects that the weight of the article collected by the weight sensor 14 for three times successively does not change, it is determined that the door body is closed, and the time point of the first collection is the closing time point.

[0147] The embodiment of the present application further provides a running control method of a refrigeration cabinet, and the refrigeration cabinet comprises:

[0148] A cabinet body;

[0149] A door body arranged at an opening of the cabinet body;

[0150] A storage compartment arranged in the cabinet body and used for storing articles;

[0151] A weight sensor arranged in the storage compartment and used for detecting the weight of the stored articles;

[0152] A temperature sensor arranged in the storage compartment and used for detecting the temperature of the compartment;

[0153] A compressor arranged in the cabinet body and used for realizing the circulation of refrigerant;

[0154] The method comprises steps S21 to S24:

[0155] S21, when detecting that the door body is opened, the compressor is controlled to stop running;

[0156] S22, according to the weight of the article before and after the door body is opened detected by the weight sensor, the weight change value is calculated;

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

[0158] S24, after detecting that the door body is closed, controlling an operation state and an operation parameter of the compressor according to the door opening duration of the door body, the weight change value, and the temperature change rate.

[0159] By means of the technical solution of the embodiment of the present application, the weight sensor and the temperature sensor are arranged in the storage chamber of the refrigerator, the weight change value and the temperature change rate of the stored articles in the refrigerator are monitored, the door opening duration is combined to control the operation of the compressor, the temperature change rate can represent the temperature reduction speed, and the storage heat load is identified in time, so that the food materials can be quickly cooled after being placed in the refrigerator, water loss is minimized, the nutrition and freshness of the food materials are ensured, the storage quality of the food materials is improved, and the user experience is improved.

[0160] As a preferred implementation, the controlling of the operation state and the operation parameter of the compressor according to the door opening duration of the door body, the weight change value, and the temperature change rate comprises:

[0161] when the door opening duration is less than or equal to a first door opening duration threshold value and the weight change value is less than or equal to a first weight threshold value, the compressor is controlled to start when a preset start-up temperature condition is met, and to operate at a historical speed after starting; wherein the historical speed is the speed of the compressor in the last start-stop cycle when the compressor is in the start-up state;

[0162] after the compressor starts to operate, when the temperature change rate is less than or equal to a preset rate threshold value, the speed of the compressor is adjusted upward by a first speed adjustment step at a first preset duration as an adjustment period until a preset maximum speed is reached;

[0163] when the temperature change rate is greater than the preset rate threshold value, the speed of the compressor is adjusted upward by a second speed adjustment step at a first preset duration as an adjustment period until a preset maximum speed is reached; wherein the first speed adjustment step is greater than the second speed adjustment step.

[0164] Preferably, it further comprises:

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

[0166] the compressor is controlled to start directly and to operate at the target speed after starting;

[0167] After the compressor starts running, the compressor speed is increased according to the second preset time period and the second speed adjustment step size, with the second preset time period as the adjustment cycle, until the preset maximum speed is reached; wherein, the second preset time period is less than the first preset time period.

[0168] in,

[0169] The target rotational speed is calculated using the following formula based on the historical rotational speed and the weight change value:

[0170]

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

[0172] In a preferred embodiment, controlling the compressor's operating state and parameters based on the door's opening time, the weight change value, and the temperature change rate includes:

[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 start-up temperature condition is met, and then runs at the historical speed after starting; wherein, the historical speed is the speed of the compressor when it was in the start-up state in the previous start-up cycle; the first door opening time threshold is less than the second door opening time threshold;

[0174] The startup duration of the compressor after the door is closed is detected;

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

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

[0177] Preferably, controlling the compressor's operating status and parameters based on the door's opening time, the weight change value, and the temperature change rate further includes:

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

[0179] After the compressor starts running, the third preset duration is taken as an adjustment period, and the speed of the compressor is adjusted upward by a third speed adjustment step until a preset maximum speed is reached.

[0180] Preferably, it further comprises:

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

[0182] The compressor is controlled to start directly, and to run at the target speed after starting;

[0183] After the compressor starts running, the third preset duration is taken as an adjustment period, and the speed of the compressor is adjusted upward by a third speed adjustment step until a preset maximum speed is reached.

[0184] As a preferred embodiment, the control of the running state and the running parameter of the compressor according to the door opening duration, the weight change value and the temperature change rate comprises:

[0185] When the door opening duration is greater than a second door opening duration 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 stop temperature condition is met.

[0186] The refrigerator cabinet further comprises a human body sensor, which is arranged on the door body and is triggered when detecting personnel activity in a preset sensing range;

[0187] The method further comprises:

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

[0189] After detecting that the door body is opened, when the weight of the object does not change within a fourth preset duration, it is determined that the door body is closed.

[0190] It should be noted that the operation control method of the refrigeration cabinet provided by the embodiment of the present application is the same as all the process steps performed by the controller of the refrigeration cabinet of the above-mentioned embodiment, and the working principles and beneficial effects of the two are one-to-one correspondence, so it is not repeated here.

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

[0192] The above is the preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the present application.

Claims

1. A refrigeration cabinet, characterized in that, include: Box; The door is located at the opening of the box body; A storage room, located inside the box, is used to store items; A weight sensor, located in the storage room, is used to detect the weight of the stored items; A temperature sensor is installed in the storage room to detect the room temperature; A compressor, located inside the housing, is used to realize refrigerant circulation; Controller, used for: When the door is detected to be open, the compressor is controlled to stop running; The weight change is calculated based on the weight of the items detected by the weight sensor before and after the door is opened. The rate of temperature change is calculated based on the room temperature detected by the temperature sensor. After detecting that the door is closed, the operating status and operating parameters of the compressor are controlled according to the door opening time, the weight change value and the temperature change rate. The method of controlling the compressor's operating status and parameters based on the door's opening time, weight change, and temperature change rate includes: 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 start-up temperature condition is met, and then runs at the historical speed after starting; wherein, the historical speed is the speed of the compressor when it was in the start-up state in the previous start-up cycle; After the compressor starts running, when the rate of temperature change is less than or equal to a preset rate threshold, the compressor speed is increased according to a first preset time period and a first speed adjustment step size until the preset maximum speed is reached. When the rate of temperature change is greater than the preset rate threshold, the compressor speed is increased according to the second speed adjustment step size, with the first preset time period as the adjustment cycle, until the preset maximum speed is reached; wherein, the first speed adjustment step size is greater than the second speed adjustment step size.

2. The refrigeration cabinet as described in claim 1, characterized in that, The method of controlling the compressor's operating status and parameters based on the door's opening time, weight change value, and temperature change rate further includes: When the door opening time is less than or equal to the first door opening time threshold and the weight change value is greater than the first weight threshold, the target rotational speed is calculated based on the historical rotational speed and the weight change value. The compressor is controlled to start directly and then run at the target speed after starting. After the compressor starts running, the compressor speed is increased according to the second preset time period and the second speed adjustment step size, with the second preset time period as the adjustment cycle, until the preset maximum speed is reached; wherein, the second preset time period is less than the first preset time period.

3. The refrigeration cabinet as described in claim 2, characterized in that, The calculation of the target rotational speed based on the historical rotational speed and the weight change value includes: The target rotational speed is calculated using the following formula based on the historical rotational speed and the weight change value: Where N is the target rotational speed. For historical rotation speed, and These are the weights of the items before and after the door is opened. The preset unit speed adjustment value, Value per unit weight.

4. The refrigeration cabinet as described in claim 1, characterized in that, The method of controlling the compressor's operating status and parameters based on the door's opening time, weight change, and temperature change rate 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 less than the second weight threshold, the compressor is controlled to start when the preset start-up temperature condition is met, and then runs at the historical speed after starting; wherein, the historical speed is the speed of the compressor when it was in the start-up state in the previous start-up cycle; the first door opening time threshold is less than the second door opening time threshold; The startup duration of the compressor after the door is closed is detected; When the startup runtime exceeds a preset runtime threshold, if the temperature change rate is less than or equal to a preset rate threshold, the compressor speed is adjusted to a preset maximum speed; if the temperature change rate is greater than the preset rate threshold, the compressor speed is increased according to a third preset duration adjustment step size, with a third preset duration as the adjustment cycle, until the preset maximum speed is reached; wherein, the preset runtime threshold is greater than the historical startup duration, and the historical startup duration is the startup duration of the compressor in the previous start-stop cycle; When the startup runtime is less than or equal to a preset runtime threshold, the current speed of the compressor is maintained unchanged.

5. The refrigeration cabinet as described in claim 4, characterized in that, The method of controlling the compressor's operating status and parameters based on the door's opening time, weight change value, and temperature change rate 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 start-up temperature condition is met, and then runs at the historical speed after starting; wherein, the first weight threshold is greater than the second weight threshold; After the compressor starts running, the compressor speed is increased according to the third preset time period as the adjustment cycle and the third speed adjustment step size until the preset maximum speed is reached.

6. The refrigeration cabinet as described in claim 5, characterized in that, The method of controlling the compressor's operating status and parameters based on the door's opening time, weight change value, and temperature change rate 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 rotational speed is calculated based on the historical rotational speed and the weight change value. The compressor is controlled to start directly and then run at the target speed after starting. After the compressor starts running, the compressor speed is increased according to the third preset time period and the third speed adjustment step size, until the preset maximum speed is reached.

7. The refrigeration cabinet as described in claim 1, characterized in that, The method of controlling the compressor's operating status and parameters based on the door's opening time, weight change, and temperature change rate includes: When the door opening time exceeds the second door opening time threshold, the compressor is controlled to start directly and run at the preset maximum speed until the preset shutdown temperature condition is met.

8. The refrigeration cabinet as described in claim 1, characterized in that, The refrigeration cabinet also includes a human body sensor, which is installed on the door and is triggered when human activity is detected within a preset sensing range. The controller is further used for: When the human body sensor is triggered and the weight of the object changes, it is determined that the door has been opened; After the door is detected to be open, if the weight of the item does not change within a fourth preset time period, it is determined that the door is detected to be closed.

9. A method for controlling the operation of a refrigeration cabinet, characterized in that, The refrigeration cabinet includes: Box; The door is located at the opening of the box body; A storage room, located inside the box, is used to store items; A weight sensor, located in the storage room, is used to detect the weight of the stored items; A temperature sensor is installed in the storage room to detect the room temperature; A compressor, located inside the housing, is used to realize refrigerant circulation; The method includes: When the door is detected to be open, the compressor is controlled to stop running; The weight change is calculated based on the weight of the items detected by the weight sensor before and after the door is opened. The rate of temperature change is calculated based on the room temperature detected by the temperature sensor. After detecting that the door is closed, the operating status and operating parameters of the compressor are controlled according to the door opening time, the weight change value and the temperature change rate. The method of controlling the compressor's operating status and parameters based on the door's opening time, weight change, and temperature change rate includes: 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 start-up temperature condition is met, and then runs at the historical speed after starting; wherein, the historical speed is the speed of the compressor when it was in the start-up state in the previous start-up cycle; After the compressor starts running, when the rate of temperature change is less than or equal to a preset rate threshold, the compressor speed is increased according to a first preset time period and a first speed adjustment step size until the preset maximum speed is reached. When the rate of temperature change is greater than the preset rate threshold, the compressor speed is increased according to the second speed adjustment step size, with the first preset time period as the adjustment cycle, until the preset maximum speed is reached; wherein, the first speed adjustment step size is greater than the second speed adjustment step size.

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