A control method for reducing energy consumption of a variable frequency refrigerator

Abstract

The application discloses a control method for reducing energy consumption of a variable-frequency refrigerator, which judges the temperature difference of an environment sensor, a refrigeration sensor and a freezing sensor, combines to judge the refrigerator load condition, controls the compressor rotating speed, controls the temperature difference of the opening and stopping point of the non-freezing chamber, increases the frequency of the opening and stopping of the non-freezing chamber air door, reduces the temperature fluctuation of the non-freezing chamber, balances the load of each chamber, reduces the starting load, thereby reduces the starting power loss, and realizes the reduction of energy consumption.

Description

Technical fields:

[0001] This invention relates to a control method for reducing the energy consumption of inverter refrigerators, which belongs to the field of refrigerator technology. Background technology:

[0002] During the development of energy-saving inverter refrigerators, the cooling capacity at corresponding speeds is adjusted according to different loads, which requires adjusting the compressor speed to reduce energy consumption during operation. However, the power consumption during startup is often overlooked. Startup power is much higher than stable operating power; reducing startup power can reduce energy consumption and decrease wear on internal components, thereby extending the compressor's lifespan. Existing technologies reduce startup power consumption by using a lower compressor speed to passively reduce power consumption, but this lacks adjustment of the refrigeration system's startup pressure balance and does not actively optimize the compressor's startup load.

[0003] Therefore, it is indeed necessary to improve existing technologies to address their shortcomings. Summary of the Invention:

[0004] This invention provides a control method for reducing the energy consumption of inverter refrigerators in order to solve the problems existing in the prior art. It can change the load of each compartment when the compressor starts, thereby reducing the load of the overall refrigeration system and the starting power of the compressor, reducing power consumption and ultimately achieving the effect of energy saving and emission reduction.

[0005] The technical solution adopted in this invention is as follows: a control method for reducing the energy consumption of a variable frequency refrigerator, comprising the following steps:

[0006] Step 1: Power on and run the refrigerator;

[0007] Step 2: Determine that the ambient temperature fluctuation difference ΔTe within t0 hours does not exceed T0℃; determine whether the refrigeration sensor temperature Tfs is within the range of refrigeration shutdown temperature (Tfs-off) -5℃ and refrigeration start-up temperature (Tfs-on) +5℃, and the duration is greater than or equal to t1.

[0008] (1) If the above conditions are met, the compressor speed Rc will decrease.

[0009] (2) If the above conditions are not met, the compressor speed Rc will remain unchanged.

[0010] Step 3: Check whether the refrigeration sensor TRS is within the range of refrigeration off temperature (Trs-off) -3℃ and refrigeration on temperature (Trs-on) +3℃ for a duration greater than or equal to t2;

[0011] (1) If the above conditions are met, the temperature difference between the start and stop points of the refrigerator will be reduced, and the frequency of refrigeration will be increased.

[0012] (2) If the above conditions are not met, the temperature difference between the start and stop points of the refrigerator remains unchanged, and the refrigeration frequency of the refrigerator remains unchanged.

[0013] Furthermore, in step two, t0 hours is 6 hours.

[0014] Furthermore, in step two, T0℃ is 6℃.

[0015] Furthermore, in step two, t1 is 30 minutes.

[0016] Furthermore, in step two, t2 is 30 minutes.

[0017] The present invention has the following beneficial effects:

[0018] (1) By monitoring the ambient temperature sensor, the refrigerator compartment temperature sensor and the freezer compartment temperature sensor together, the refrigerator load is determined. When the refrigerator is in a relatively stable ambient temperature, the compressor speed is controlled, the frequency of the refrigerator door opening and stopping is changed, the temperature fluctuation of the non-freezer compartment is reduced, the load of each compartment is balanced, the starting load is reduced, thereby reducing the starting power loss and achieving energy reduction.

[0019] (2) Increase the frequency of opening and stopping of the air damper in the non-freezing compartment to reduce the temperature fluctuation in the non-freezing compartment due to the longer warming time in the non-freezing compartment. This will keep the refrigerator in a relatively balanced state and reduce the starting power loss. This will not only effectively avoid instantaneous large current and reduce the current impact on the main control board, but also simultaneously reduce energy consumption, reduce noise, enhance the reliability of the main board, and extend the food storage time. Attached image description:

[0020] Figure 1 This is a flowchart of the control method for reducing energy consumption in a variable frequency refrigerator according to the present invention. Detailed implementation method:

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] The present invention provides a control method for reducing energy consumption in inverter refrigerators, the specific steps of which are as follows:

[0023] Step 1: Power on and run the refrigerator;

[0024] Step 2: Determine that the ambient temperature fluctuation difference ΔTe does not exceed 6℃ within 6 hours; determine whether the refrigeration sensor temperature Tfs is within the range of refrigeration shutdown temperature (Tfs-off) -5℃ and refrigeration start temperature (Tfs-on) +5℃, and the duration is greater than or equal to 30 minutes.

[0025] (1) If the above conditions are met, the compressor speed Rc will decrease.

[0026] (2) If the above conditions are not met, the compressor speed Rc will remain unchanged.

[0027] Step 3: Check whether the refrigeration sensor TRS is within the range of refrigeration off temperature (Trs-off) -3℃ and refrigeration on temperature TRS-on +3℃ for a duration of 30 minutes or more.

[0028] (1) If the above conditions are met, the temperature difference between the start and stop points of the refrigerator will be reduced, and the frequency of refrigeration will be increased.

[0029] (2) If the above conditions are not met, the temperature difference between the start and stop points of the refrigerator remains unchanged, and the refrigeration frequency of the refrigerator remains unchanged.

[0030] When the refrigerator compartment temperature is high, the compressor operates at high load, maintaining a large temperature difference between the refrigerator's on / off start points to quickly raise the temperature. Based on specific ambient temperature and freezing sensor monitoring, when the overall refrigerator load decreases, the compressor reduces its speed to achieve more balanced operation. Simultaneously, the refrigerator sensor is monitored, and the on / off temperature difference for the refrigerator is appropriately reduced, increasing the frequency of refrigeration and decreasing the temperature difference between the compartments. This brings the refrigerator and freezer into a more balanced state. At this point, the compressor is no longer affected by the prolonged opening of the refrigerator's air vents, resulting in a lower load and reduced starting energy consumption.

[0031] The present invention provides a control method for reducing energy consumption in inverter refrigerators. By judging the temperature difference between the ambient sensor temperature, the refrigerator sensor temperature, and the freezer sensor temperature, the refrigerator load is determined, the compressor speed is controlled, the temperature difference between the start and stop points of the non-freezing compartment is reduced, the frequency of the non-freezing compartment damper opening and stopping is increased, the temperature fluctuation of the non-freezing compartment is reduced, the load of each compartment is balanced, and the starting load is reduced, thereby reducing the starting power loss and achieving energy reduction.

[0032] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be considered within the scope of protection of the present invention.

Claims

1. A control method of reducing energy consumption of a variable frequency refrigerator, characterized by The steps are as follows: Step 1: Power on and run the refrigerator; Step 2: Determine that the ambient temperature fluctuation difference ΔTe within t0 hours does not exceed T0℃; determine whether the refrigeration sensor temperature Tfs is within the range of refrigeration shutdown temperature (Tfs-off) -5℃ and refrigeration start-up temperature (Tfs-on) +5℃, and the duration is greater than or equal to t1. (1) If the above conditions are met, the compressor speed Rc will decrease. (2) If the above conditions are not met, the compressor speed Rc will remain unchanged. Step 3: Check whether the refrigeration sensor TRS is within the range of refrigeration off temperature (Trs-off) -3℃ and refrigeration on temperature (Trs-on) +3℃ for a duration greater than or equal to t2; (1) If the above conditions are met, the temperature difference between the start and stop points of the refrigerator will be reduced, and the frequency of refrigeration will be increased. (2) If the above conditions are not met, the temperature difference between the start and stop points of the refrigerator remains unchanged, and the refrigeration frequency of the refrigerator remains unchanged.

2. The control method of reducing power consumption of a variable frequency refrigerator according to claim 1, characterized in that In step two, t0 hours is 6 hours.

3. The control method of reducing power consumption of a variable frequency refrigerator according to claim 2, characterized in that In step two, T0℃ is 6℃.

4. The control method of reducing power consumption of a variable frequency refrigerator according to claim 3, characterized in that In step two, t1 is 30 minutes.

5. The control method of claim 4, wherein the control method is characterized by In step two, t2 is 30 minutes.

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