Refrigeration control method for a triple-system refrigerator

Abstract

The application discloses a three-system refrigerator refrigeration control method, which is used for refrigeration control of a refrigerator with a refrigeration, a variable-temperature and a freezing three-cycle system, and comprises the following steps: S1: starting the refrigerator, judging whether real-time temperature values of variable-temperature and freezing compartments of the refrigerator are greater than corresponding preset temperature values at the same time, if yes, clearing zero of a refrigerator compressor operation time parameter, and entering a refrigerator defrosting control process; if no, the refrigerator compressor operation time parameter is not cleared zero, and directly entering the refrigerator defrosting control mode; S2: in the process of executing the refrigerator defrosting control mode, firstly judging whether the refrigerator needs defrosting, if yes, entering a refrigerator refrigeration control process after defrosting is finished; if no, directly entering the refrigerator refrigeration control mode. The three-system refrigerator refrigeration control method makes the refrigeration and defrosting control systematized, controls according to refrigeration requirements of different compartments in combination, and improves system operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of refrigerator refrigeration and defrosting control technology, specifically to a three-system refrigerator refrigeration control method. Background Technology

[0002] With the improvement of living standards, people have higher requirements for refrigeration products such as refrigerators. Currently, based on single-system refrigerators, three-system refrigerators have been developed, which have a three-cycle system. In addition to the freezer compartment containing the evaporator, other compartments such as the refrigerator compartment and variable-temperature compartment also have separate evaporators, giving each compartment its own independent refrigeration path. This results in more accurate temperature control in each compartment, on-demand cooling, stable performance, and lower power consumption. However, the existing refrigeration control method for three-system refrigerators involves a controller receiving compartment temperatures and evaporator temperatures from temperature sensors in each compartment to determine the refrigerator's operating mode. This mode then controls the evaporator fans to achieve the three-system refrigeration function. Furthermore, a fixed defrost cycle needs to be set based on ambient temperature and freezer setpoints. This refrigeration control method is complex and has low system efficiency. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a three-system refrigerator refrigeration control method that systematizes the refrigeration and defrosting control system and combines control according to the refrigeration needs of different compartments, thereby improving system operating efficiency.

[0004] The technical solution adopted in this invention is as follows:

[0005] A three-system refrigerator refrigeration control method is used to control the refrigeration of a refrigerator with a three-cycle system of refrigeration, variable temperature and freezing, including the following steps:

[0006] S1: Start the refrigerator and determine whether the real-time temperature values ​​of the refrigerator's variable temperature compartment and the freezer compartment are simultaneously greater than the corresponding preset temperature values. If so, the refrigerator compressor running time parameter is reset to zero and the refrigerator defrost control process is entered. If not, the refrigerator compressor running time parameter is not reset and the refrigerator defrost control mode is entered directly.

[0007] S2: During the execution of the refrigerator defrosting control mode, first determine whether the refrigerator needs defrosting. If defrosting is needed, the refrigerator cooling control process will begin after defrosting is completed; otherwise, the refrigerator cooling control mode will be entered directly.

[0008] Furthermore, the refrigerator compressor running time parameters in step S1 include the cumulative running time of the refrigerator compressor and the refrigerator running time.

[0009] Furthermore, the specific steps for executing the refrigerator cooling control mode in step S2 are as follows:

[0010] S21: Determine the cooling requirements of refrigeration, variable temperature, and freezer compartments;

[0011] S22: Select the required conventional refrigeration combination mode or special operating mode according to the refrigeration needs of the refrigeration, variable temperature, and freezer compartments, and automatically execute the corresponding refrigeration control process after selection.

[0012] Furthermore, the method for determining the refrigeration requirements of the refrigeration, variable temperature, and freezer compartments in step S21 is as follows:

[0013] If the real-time temperature of the cold storage compartment is greater than or equal to the preset cooling value plus the temperature compensation value, then the cold storage compartment needs to be cooled, and the cooling status flag is set to 1. Otherwise, if the cooling status flag is 1 and the real-time temperature of the cold storage compartment is greater than or equal to the preset cooling value minus the temperature compensation value, then the cold storage compartment needs to be cooled. Otherwise, the cooling status flag is set to 0, and cooling is not required.

[0014] If the real-time temperature value of the variable temperature room is greater than or equal to the preset cooling value of the variable temperature room plus the temperature compensation value of the variable temperature room, then the variable temperature room needs to be cooled and the variable temperature cooling status flag is set to 1; otherwise, if the variable temperature cooling status flag is 1 and the real-time temperature value of the variable temperature room is greater than or equal to the preset cooling value of the variable temperature room minus the temperature compensation value of the variable temperature room, then the variable temperature room needs to be cooled; otherwise, the variable temperature cooling status flag is set to 0 and cooling is not required.

[0015] If the real-time temperature value of the freezer compartment is greater than or equal to the preset cooling value of the freezer compartment plus the temperature compensation value of the freezer compartment, then the freezer compartment needs to be cooled and the freezer cooling status flag is set to 1; otherwise, if the freezer cooling status flag is 1 and the real-time temperature value of the freezer compartment is greater than or equal to the preset cooling value of the freezer compartment minus the temperature compensation value of the freezer compartment, then the freezer compartment needs to be cooled; otherwise, the freezer cooling status flag is set to 0 and cooling is not required.

[0016] Furthermore, in step S22, there are a total of 2 conventional refrigeration combination modes. n There are several types, where n is greater than or equal to 3, and n is the number of refrigerator compartments.

[0017] Furthermore, when the refrigerator has three compartments—one for refrigeration, one for variable temperature, and one for freezing—it covers eight different cooling needs and corresponds to eight standard cooling combination modes:

[0018] Cooling Mode A: No cooling required for the refrigerator compartment, no cooling required for the variable temperature compartment, and no cooling required for the freezer compartment;

[0019] Cooling Mode B: Refrigeration room does not require cooling, variable temperature room does not require cooling, and freezer room requires cooling;

[0020] Cooling Mode C: Refrigeration compartment does not require cooling, variable temperature compartment requires cooling, and freezer compartment does not require cooling;

[0021] Cooling Mode D: Refrigeration room does not require cooling, variable temperature room requires cooling, and freezer room requires cooling;

[0022] Cooling mode E: Refrigeration room requires cooling, variable temperature room does not require cooling, and freezer room does not require cooling;

[0023] Cooling mode F: Refrigeration room requires cooling, variable temperature room does not require cooling, and freezer room requires cooling;

[0024] Cooling mode G: Refrigeration room requires cooling, variable temperature room requires cooling, freezer room does not require cooling;

[0025] Cooling mode H: Refrigeration room needs cooling, variable temperature room needs cooling, and freezer room needs cooling.

[0026] Furthermore, the refrigeration control process corresponding to the refrigeration modes A to H is as follows:

[0027] Refrigeration control process A: The compressor stops, the solenoid valve is reset (the reset state is that the outlet of the refrigerator valve is closed, the outlet of the temperature variable valve is closed, and the outlet of the freezer valve is closed), the refrigerator evaporator fan stops running, the temperature variable evaporator fan stops running, the freezer evaporator fan stops running, and the condenser fan stops running;

[0028] Refrigeration control process B: The compressor starts, the refrigeration valve outlet of the solenoid valve opens, the refrigeration evaporator stops running, the variable temperature evaporator stops running, the refrigeration evaporator runs, and the condenser runs.

[0029] Refrigeration control process C: Compressor starts, the outlet of the solenoid valve's temperature variable valve opens, the refrigeration evaporator stops running, the temperature variable evaporator runs, the freezing evaporator stops, and the condenser runs;

[0030] Refrigeration control process D: Compressor starts, the outlet of the solenoid valve's temperature variable valve opens, the refrigeration evaporator stops running, the temperature variable evaporator runs, the freezing evaporator runs, and the condenser runs;

[0031] Refrigeration control process E: Compressor starts, refrigeration valve outlet of solenoid valve opens, refrigeration evaporator fan runs, variable temperature evaporator fan stops running, freezing evaporator fan stops running, condenser fan runs;

[0032] Refrigeration control process F: Compressor starts, refrigeration valve outlet of solenoid valve opens, refrigeration evaporator fan runs, variable temperature evaporator fan stops running, freezing evaporator fan runs, condenser fan runs;

[0033] Refrigeration control process G: Compressor starts, the outlet of the solenoid valve's refrigeration valve and temperature-changing valve opens, the refrigeration evaporator fan runs, the temperature-changing evaporator fan runs, the freezing evaporator fan stops running, and the condenser fan runs.

[0034] Refrigeration control process H: Compressor starts, the outlet of the solenoid valve's refrigeration valve and temperature-changing valve opens, the refrigeration evaporator fan runs, the temperature-changing evaporator fan runs, the freezing evaporator fan runs, and the condenser fan runs;

[0035] Furthermore, when it is determined in step S21 that the refrigeration and / or variable temperature compartments need cooling while the freezer compartments do not need cooling (i.e., corresponding to cooling modes C, E, or G), it is also necessary to determine whether the real-time temperature value of the refrigeration compartment or the variable temperature compartment is greater than the preset cooling value of the refrigeration or variable temperature compartment + the temperature compensation value of the refrigeration or variable temperature compartment + the high temperature start-up compensation value of the refrigeration or variable temperature compartment. If yes, then the corresponding cooling control process C, E, or G is executed; if no, then the cooling control process A is executed. If yes, then the corresponding cooling control process C, E, or G is executed; otherwise, the cooling control process A is executed.

[0036] Furthermore, the specific steps for executing the corresponding cooling mode in step S22 are as follows:

[0037] S221. Determine whether the refrigerator needs defrosting. If defrosting is required, execute the corresponding cooling control process after defrosting is completed; if defrosting is not required, execute the corresponding cooling control process directly.

[0038] S222. Determine whether the corresponding cooling demand has been met; if the cooling demand has been met, the cooling process ends and steps S221 and S222 are repeated; if the cooling demand has not been met, the corresponding cooling control process continues.

[0039] The beneficial effects of this invention are as follows:

[0040] The present invention provides a three-system refrigerator refrigeration control method, which systematizes the refrigeration and defrosting control system and controls it according to the refrigeration needs of different compartments, thereby improving the system operating efficiency. Attached Figure Description

[0041] To clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a system structure diagram of the three-system refrigerator of the present invention;

[0043] Figure 2This is a flowchart of the refrigeration control method of the present invention;

[0044] Figure 3 This is a flowchart illustrating the selection process for cooling modes C, E, and G in this invention.

[0045] Figure 4 This is a flowchart illustrating the refrigeration control process performed by the present invention;

[0046] Figure 5 This invention describes the conventional refrigeration combination mode and the corresponding refrigeration control process.

[0047] The image is labeled as follows:

[0048] 1. Refrigerated evaporator; 2. Refrigerated evaporator fan; 3. Variable temperature evaporator; 4. Variable temperature evaporator fan; 5. Freezing evaporator; 6. Freezing evaporator fan; 7. Compressor; 8. Condenser; 9. Condenser fan; 10. Solenoid valve. Detailed Implementation

[0049] This invention provides a three-system refrigerator refrigeration control method. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0050] The present invention will now be described in detail with reference to the accompanying drawings:

[0051] Reference Figure 1 This invention provides a three-system refrigerator refrigeration control method for controlling the refrigeration of a refrigerator with a three-cycle system of refrigeration, variable temperature, and freezing. In this embodiment, the three-system refrigerator includes three compartments: refrigeration, variable temperature, and freezing. Each compartment is equipped with a refrigeration evaporator 1 and a refrigeration evaporation fan 2, a variable temperature evaporator 3 and a variable temperature evaporation fan 4, and a freezing evaporator 5 and a freezing evaporation fan 6, respectively. Additionally, the three-system refrigerator includes a compressor 7, a condenser 8 and a condenser fan 9, and a solenoid valve 10 (a one-inlet, three-outlet stepper valve, controlling the refrigeration, variable temperature, and freezing systems respectively). The connection relationships of the compressor, condenser and condenser fan, refrigeration evaporator and refrigeration evaporation fan, variable temperature evaporator and variable temperature evaporation fan, and freezing evaporator and freezing evaporation fan are as follows: Figure 1 As shown, the connection relationship and installation can be obtained by those skilled in the art from the prior art, and will not be described again in this embodiment.

[0052] Reference Figure 2-5 Based on the above three-system refrigerator, its refrigeration control method includes the following steps:

[0053] S1: Start the refrigerator and determine whether the real-time temperature values ​​of the refrigerator's variable temperature compartment and the freezer compartment are simultaneously greater than the corresponding preset temperature values. If so, the refrigerator compressor running time parameters (including the cumulative running time of the compressor after the refrigerator starts and the refrigerator running time) are cleared to zero, and the refrigerator defrosting control process is entered. If not, the refrigerator compressor running time parameters are not cleared, and the refrigerator defrosting control mode is entered directly.

[0054] S2: During the execution of the refrigerator defrosting control mode, first determine whether the refrigerator needs defrosting. If defrosting is needed, the refrigerator cooling control process will begin after defrosting is completed; otherwise, the refrigerator cooling control mode will be entered directly.

[0055] In step S2 above, determining whether the refrigerator has defrosted requires meeting one of the following defrosting conditions:

[0056] (1) After the refrigerator starts, the cumulative running time of the compressor is greater than the preset cumulative running time and the cumulative door opening time is greater than the preset cumulative door opening time, then it enters the defrosting stage;

[0057] (2) The refrigerator runs for longer than the preset refrigerator running time and has not defrosted once during the refrigerator's operation, thus meeting one of the above defrosting conditions.

[0058] Specifically, the steps for executing the refrigerator cooling control mode in step S2 above are as follows:

[0059] S21: Determine the cooling requirements of the refrigeration, variable temperature, and freezer compartments respectively. The specific determination method is as follows:

[0060] If the real-time temperature of the cold storage compartment is greater than or equal to the preset cooling value plus the temperature compensation value, then the cold storage compartment needs to be cooled, and the cooling status flag is set to 1. Otherwise, if the cooling status flag is 1 and the real-time temperature of the cold storage compartment is greater than or equal to the preset cooling value minus the temperature compensation value, then the cold storage compartment needs to be cooled. Otherwise, the cooling status flag is set to 0, and cooling is not required.

[0061] If the real-time temperature value of the variable temperature room is greater than or equal to the preset cooling value of the variable temperature room plus the temperature compensation value of the variable temperature room, then the variable temperature room needs to be cooled and the variable temperature cooling status flag is set to 1; otherwise, if the variable temperature cooling status flag is 1 and the real-time temperature value of the variable temperature room is greater than or equal to the preset cooling value of the variable temperature room minus the temperature compensation value of the variable temperature room, then the variable temperature room needs to be cooled; otherwise, the variable temperature cooling status flag is set to 0 and cooling is not required.

[0062] If the real-time temperature value of the freezer compartment is greater than or equal to the preset cooling value of the freezer compartment plus the temperature compensation value of the freezer compartment, then the freezer compartment needs to be cooled and the freezer cooling status flag is set to 1; otherwise, if the freezer cooling status flag is 1 and the real-time temperature value of the freezer compartment is greater than or equal to the preset cooling value of the freezer compartment minus the temperature compensation value of the freezer compartment, then the freezer compartment needs to be cooled; otherwise, the freezer cooling status flag is set to 0 and cooling is not required.

[0063] When determining the above-mentioned cooling demand, if the real-time temperature value is greater than or equal to the preset cooling value plus the temperature compensation value, then cooling is determined to be required. Cooling will stop when the real-time temperature value is less than the preset cooling value minus the temperature compensation value. In other words, during the cooling process, if the real-time temperature value is within the range of [preset cooling value + temperature compensation value, preset cooling value - temperature compensation value], it is determined that there is a cooling demand; if during the non-cooling process, the initial real-time temperature value is less than the preset cooling value plus the temperature compensation value, then it is determined that there is no cooling demand.

[0064] S22: Select the required conventional refrigeration combination mode or special operating mode according to the refrigeration requirements of the refrigeration, variable temperature, and freezer compartments. After selection, automatically execute the corresponding refrigeration control process. The specific steps for executing the corresponding refrigeration mode in step S22 are as follows:

[0065] S221. Determine whether the refrigerator needs defrosting. If defrosting is required, execute the corresponding cooling control process after defrosting is completed; if defrosting is not required, execute the corresponding cooling control process directly.

[0066] S222. Determine whether the corresponding cooling demand has been met; if the cooling demand has been met, the cooling process ends and steps S221 and S222 are repeated; if the cooling demand has not been met, the corresponding cooling control process continues.

[0067] In step S221 above, determining whether the refrigerator has defrosted requires meeting one of the following defrosting conditions:

[0068] (1) After the refrigerator starts, the cumulative running time of the compressor is greater than the preset cumulative running time and the cumulative door opening time is greater than the preset cumulative door opening time, then it enters the defrosting stage;

[0069] (2) The refrigerator runs for longer than the preset refrigerator running time and has not defrosted once during the refrigerator's operation, thus meeting one of the above defrosting conditions.

[0070] Specifically, based on the cooling demand determination method in step S21 above, a total of 8 cooling demands are generated, corresponding to 8 conventional cooling combination modes, namely:

[0071] Cooling mode A (000): Refrigeration is not required for the refrigerator compartment, the variable temperature compartment, and the freezer compartment.

[0072] Cooling mode B(001): Refrigeration room does not require cooling, variable temperature room does not require cooling, and freezer room requires cooling;

[0073] Cooling mode C(010): Refrigeration room does not require cooling, variable temperature room requires cooling, and freezer room does not require cooling;

[0074] Cooling mode D(011): Refrigeration room does not require cooling, variable temperature room requires cooling, and freezer room requires cooling;

[0075] Cooling mode E(100): Refrigeration room requires cooling, variable temperature room does not require cooling, and freezer room does not require cooling;

[0076] Cooling mode F(101): Refrigeration room requires cooling, variable temperature room does not require cooling, and freezer room requires cooling;

[0077] Cooling mode G(110): Refrigeration room requires cooling, variable temperature room requires cooling, freezer room does not require cooling;

[0078] Cooling mode H(111): Refrigeration room needs cooling, variable temperature room needs cooling, and freezer room needs cooling;

[0079] The refrigeration control process corresponding to the above refrigeration modes A to H is as follows:

[0080] Refrigeration control process A: The compressor stops, the solenoid valve is reset (the reset state is that the outlet of the refrigerator valve is closed, the outlet of the temperature control valve is closed, and the outlet of the freezer valve is closed), the refrigerator evaporator fan stops running, the temperature control evaporator fan stops running, the freezer evaporator fan stops running, and the condenser fan stops running.

[0081] Refrigeration control process B: The compressor starts, the refrigeration valve outlet of the solenoid valve opens, the refrigeration evaporator stops running, the variable temperature evaporator stops running, the refrigeration evaporator runs, and the condenser runs.

[0082] Refrigeration control process C: Compressor starts, the outlet of the solenoid valve's temperature variable valve opens, the refrigeration evaporator stops running, the temperature variable evaporator runs, the freezing evaporator stops, and the condenser runs;

[0083] Refrigeration control process D: Compressor starts, the outlet of the solenoid valve's temperature variable valve opens, the refrigeration evaporator stops running, the temperature variable evaporator runs, the freezing evaporator runs, and the condenser runs;

[0084] Refrigeration control process E: Compressor starts, refrigeration valve outlet of solenoid valve opens, refrigeration evaporator fan runs, variable temperature evaporator fan stops running, freezing evaporator fan stops running, condenser fan runs;

[0085] Refrigeration control process F: Compressor starts, refrigeration valve outlet of solenoid valve opens, refrigeration evaporator fan runs, variable temperature evaporator fan stops running, freezing evaporator fan runs, condenser fan runs;

[0086] Refrigeration control process G: Compressor starts, the outlet of the solenoid valve's refrigeration valve and temperature-changing valve opens, the refrigeration evaporator fan runs, the temperature-changing evaporator fan runs, the freezing evaporator fan stops running, and the condenser fan runs.

[0087] Refrigeration control process H: Compressor starts, the outlet of the solenoid valve for refrigeration and the outlet of the variable temperature valve open, the refrigeration evaporator fan runs, the variable temperature evaporator fan runs, the refrigeration evaporator fan runs, and the condenser fan runs.

[0088] In addition, when it is determined in step S21 above that the refrigeration and / or variable temperature compartments need to be refrigerated while the freezer compartments do not need to be refrigerated, i.e. when entering refrigeration modes C, E, and G, it is also necessary to determine whether the real-time temperature value of the refrigeration compartment or the variable temperature compartment is greater than the preset refrigeration value of the refrigeration or variable temperature compartment + the temperature compensation value of the refrigeration or variable temperature compartment + the high temperature start-up compensation value of the refrigeration or variable temperature compartment. If yes, the corresponding refrigeration control process C, E, or G is executed; otherwise, the refrigeration control process A is executed. Specifically, if entering cooling mode C, it is necessary to determine whether the real-time temperature value of the variable temperature compartment is greater than the preset cooling value + temperature compensation value + high temperature start-up compensation value of the variable temperature compartment. If yes, the corresponding cooling control process C is executed; otherwise, cooling control process A is executed. If entering cooling mode E, it is necessary to determine whether the real-time temperature value of the refrigerator compartment is greater than the preset cooling value + temperature compensation value + high temperature start-up compensation value of the refrigerator compartment. If yes, the corresponding cooling control process E is executed; otherwise, cooling control process A is executed. If entering cooling mode G, it is necessary to determine whether the real-time temperature value of the refrigerator compartment is greater than the preset cooling value + temperature compensation value + high temperature start-up compensation value of the refrigerator compartment or whether the real-time temperature value of the variable temperature compartment is greater than the preset cooling value + temperature compensation value + high temperature start-up compensation value of the variable temperature compartment. If yes, either condition is met and the corresponding cooling control process G is executed; otherwise, cooling control process A is executed.

[0089] It should be noted that any parts not mentioned in this invention can be achieved by using or referencing existing technologies.

[0090] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A three-system refrigerator refrigeration control method for controlling the refrigeration of a refrigerator with a three-cycle system of refrigeration, variable temperature, and freezing. The three-system refrigerator includes three compartments: refrigeration, variable temperature, and freezing, as well as a compressor, condenser, condenser fan, and solenoid valve. The refrigeration, variable temperature, and freezing compartments are respectively equipped with a refrigeration evaporator and refrigeration evaporator fan, a variable temperature evaporator and variable temperature evaporator fan, and a freezing evaporator and freezing evaporator fan. The solenoid valve is a one-inlet, three-outlet stepping valve. The compressor and condenser are connected in series to the inlet of the solenoid valve. The inlets of the refrigeration evaporator, variable temperature evaporator, and freezing evaporator are respectively connected to the three outlets of the solenoid valve. The refrigeration evaporator and the variable temperature evaporator are connected in parallel, and the outlets of the refrigeration evaporator and the variable temperature evaporator converge at the inlet of the freezing evaporator. The outlet of the freezing evaporator is connected to the compressor. The method is characterized in that... Including the following steps: S1: Start the refrigerator and determine whether the real-time temperature values ​​of the refrigerator's variable temperature compartment and the freezer compartment are simultaneously greater than the corresponding preset temperature values. If so, the refrigerator compressor running time parameter is reset to zero and the refrigerator defrost control process is entered. If not, the refrigerator compressor running time parameter is not reset and the refrigerator defrost control mode is entered directly. S2: During the execution of the refrigerator defrosting control mode, first determine whether the refrigerator needs defrosting. If defrosting is needed, the refrigerator cooling control process will begin after defrosting is completed; otherwise, the refrigerator cooling control mode will be entered directly. In step S2, determining whether the refrigerator has defrosted requires meeting one of the following defrosting conditions: (1) After the refrigerator is started, the cumulative running time of the compressor is greater than the preset cumulative running time and the cumulative door opening time is greater than the preset cumulative door opening time; (2) The refrigerator runs for longer than the preset refrigerator running time and has not been defrosted once during the refrigerator's operation.

2. The three-system refrigerator refrigeration control method according to claim 1, characterized in that, The refrigerator compressor running time parameters in step S1 include the cumulative running time of the refrigerator compressor and the refrigerator running time.

3. The three-system refrigerator refrigeration control method according to claim 1, characterized in that, The specific steps for executing the refrigerator cooling control mode in step S2 are as follows: S21: Determine the cooling requirements of refrigeration, variable temperature, and freezer compartments; S22: Select the required conventional refrigeration combination mode or special operating mode according to the refrigeration needs of the refrigeration, variable temperature, and freezer compartments, and automatically execute the corresponding refrigeration control process after selection.

4. The three-system refrigerator refrigeration control method according to claim 3, characterized in that, The method for determining the refrigeration requirements of the refrigeration, variable temperature, and freezer compartments in step S21 is as follows: If the real-time temperature of the cold storage compartment is greater than or equal to the preset cooling value plus the temperature compensation value, then the cold storage compartment needs to be cooled, and the cooling status flag is set to 1. Otherwise, if the cooling status flag is 1 and the real-time temperature of the cold storage compartment is greater than or equal to the preset cooling value minus the temperature compensation value, then the cold storage compartment needs to be cooled. Otherwise, the cooling status flag is set to 0, and cooling is not required. If the real-time temperature value of the variable temperature room is greater than or equal to the preset cooling value of the variable temperature room plus the temperature compensation value of the variable temperature room, then the variable temperature room needs to be cooled and the variable temperature cooling status flag is set to 1. Otherwise, determine whether the variable temperature cooling status flag is 1 and whether the real-time temperature value of the variable temperature room is greater than or equal to the preset cooling value of the variable temperature room minus the temperature compensation value of the variable temperature room. If so, the variable temperature room needs to be cooled; otherwise, set the variable temperature cooling status flag to 0 and cooling is not required. If the real-time temperature value of the freezer compartment is greater than or equal to the preset cooling value of the freezer compartment plus the temperature compensation value of the freezer compartment, then the freezer compartment needs to be cooled and the freezer cooling status flag is set to 1; otherwise, if the freezer cooling status flag is 1 and the real-time temperature value of the freezer compartment is greater than or equal to the preset cooling value of the freezer compartment minus the temperature compensation value of the freezer compartment, then the freezer compartment needs to be cooled; otherwise, the freezer cooling status flag is set to 0 and cooling is not required.

5. The three-system refrigerator refrigeration control method according to claim 4, characterized in that, In step S22, there are a total of 2 conventional refrigeration combination modes. n There are several types, where n is greater than or equal to 3, and n is the number of refrigerator compartments.

6. The three-system refrigerator refrigeration control method according to claim 5, characterized in that, When a refrigerator has three compartments—one for refrigeration, one for variable temperature, and one for freezing—it caters to eight different cooling needs and corresponds to eight standard cooling combination modes: Cooling Mode A: No cooling required for the refrigerator compartment, no cooling required for the variable temperature compartment, and no cooling required for the freezer compartment; Cooling Mode B: Refrigeration room does not require cooling, variable temperature room does not require cooling, and freezer room requires cooling; Cooling Mode C: Refrigeration compartment does not require cooling, variable temperature compartment requires cooling, and freezer compartment does not require cooling; Cooling Mode D: Refrigeration room does not require cooling, variable temperature room requires cooling, and freezer room requires cooling; Cooling mode E: Refrigeration room requires cooling, variable temperature room does not require cooling, and freezer room does not require cooling; Cooling mode F: Refrigeration room requires cooling, variable temperature room does not require cooling, and freezer room requires cooling; Cooling mode G: Refrigeration room requires cooling, variable temperature room requires cooling, freezer room does not require cooling; Cooling mode H: Refrigeration room needs cooling, variable temperature room needs cooling, and freezer room needs cooling.

7. A three-system refrigerator refrigeration control method according to claim 6, characterized in that, The cooling control process corresponding to the cooling modes A~H is as follows: Refrigeration control process A: Compressor stops, solenoid valve resets, refrigeration evaporator stops, variable temperature evaporator stops, freezing evaporator stops, condenser stops; Refrigeration control process B: The compressor starts, the refrigeration valve outlet of the solenoid valve opens, the refrigeration evaporator stops running, the variable temperature evaporator stops running, the refrigeration evaporator runs, and the condenser runs. Refrigeration control process C: Compressor starts, the outlet of the solenoid valve's temperature variable valve opens, the refrigeration evaporator stops running, the temperature variable evaporator runs, the freezing evaporator stops running, and the condenser runs. Refrigeration control process D: Compressor starts, the outlet of the solenoid valve's temperature variable valve opens, the refrigeration evaporator stops running, the temperature variable evaporator runs, the freezing evaporator runs, and the condenser runs; Refrigeration control process E: Compressor starts, refrigeration valve outlet of solenoid valve opens, refrigeration evaporator fan runs, variable temperature evaporator fan stops running, freezing evaporator fan stops running, condenser fan runs; Refrigeration control process F: Compressor starts, refrigeration valve outlet of solenoid valve opens, refrigeration evaporator fan runs, variable temperature evaporator fan stops running, freezing evaporator fan runs, condenser fan runs; Refrigeration control process G: Compressor starts, the outlet of the solenoid valve's refrigeration valve and temperature-changing valve opens, the refrigeration evaporator fan runs, the temperature-changing evaporator fan runs, the freezing evaporator fan stops running, and the condenser fan runs. Refrigeration control process H: Compressor starts, the outlet of the solenoid valve for refrigeration and the outlet of the variable temperature valve open, the refrigeration evaporator fan runs, the variable temperature evaporator fan runs, the refrigeration evaporator fan runs, and the condenser fan runs.

8. A three-system refrigerator refrigeration control method according to claim 6, characterized in that, When it is determined in step S21 that the refrigeration and / or variable temperature compartments need cooling while the freezer compartments do not need cooling (i.e., corresponding to cooling modes C, E, or G), it is also necessary to determine whether the real-time temperature value of the refrigeration compartment or the variable temperature compartment is greater than the preset cooling value of the refrigeration or variable temperature compartment + the temperature compensation value of the refrigeration or variable temperature compartment + the high temperature start-up compensation value of the refrigeration or variable temperature compartment. If yes, the corresponding cooling control process C, E, or G is executed; otherwise, the cooling control process A is executed.

9. A three-system refrigerator refrigeration control method according to claim 3, characterized in that, The specific steps for executing the corresponding cooling mode in step S22 are as follows: S221. Determine whether the refrigerator needs defrosting. If defrosting is required, execute the corresponding cooling control process after defrosting is completed; if defrosting is not required, execute the corresponding cooling control process directly. S222. Determine whether the corresponding cooling demand has been met; if the cooling demand has been met, the cooling process ends and steps S221 and S222 are repeated; if the cooling demand has not been met, the corresponding cooling control process continues.

Images