A control method for reducing the noise of an embedded refrigerator

Abstract

The present invention discloses a control method for reducing the noise of an embedded refrigerator. Under the condition of good ventilation, after the refrigerator works for a certain period of time, the refrigerant outlet temperature of the condenser will be controlled below the ambient temperature + 8°C. The present invention will determine that the refrigerator is currently in a working condition with good ventilation, and will combine the starting rate of the compressor to reduce the rotational speeds of the freezing fan, the compressor, and the condenser fan to reduce the noise. When it is detected that the starting rate of the compressor rises to a certain value, the three components will be gradually accelerated to meet the performance requirements. After the refrigerator works for a certain period of time, generally about 12 hours or so, in an environment with poor ventilation, the outlet temperature of the external condenser is very likely to exceed the temperature of the ambient temperature + 8°C. At this time, the present invention will consider that the refrigerator is in an embedded working environment with poor ventilation, and will determine whether it is necessary to increase the rotational speeds of the compressor, the evaporator fan, and the condenser fan according to the starting rate at this time to meet the performance requirements of the refrigerator.

Description

Technical Field:

[0001] The present invention relates to a control method for reducing the noise of an embedded refrigerator, which belongs to the technical field of refrigerators. Background Art:

[0002] To meet the decoration needs of modern home decoration, currently, air-cooled embedded refrigerators have quietly emerged in the market. The embedded refrigerator can be perfectly embedded in the wall or the reserved space of the cabinet reserved by the user in advance. In general, in order to meet the refrigeration performance requirements, built-in condensers are placed on both sides of the refrigerator. Due to the influence of the use environment of the embedded refrigerator, there is not enough heat dissipation space reserved on both sides of the refrigerator, and the built-in condenser can only be changed to an external one and placed in the refrigerator compressor compartment. The main types of condensers are wire condensers, spiral fin condensers, and microchannel condensers. Without exception, these condensers add a heat dissipation fan on the side to generate forced convection air to dissipate the heat generated by the condenser and the compressor in the refrigeration working chamber of the refrigerator from the gaps (mainly the bottom) around the refrigerator to the front and around the refrigerator. Therefore, in addition to the refrigerant noise in the refrigeration pipeline, the noise sources of such air-cooled refrigerators have changed from the ordinary compressor and evaporator fan to three noise sources: the compressor, the evaporator fan, and the condenser fan. In order to ensure good ventilation and heat dissipation requirements in the compressor compartment, generally not too many shielding components are added to the newly added condenser fan, so the noise it emits is also relatively obvious.

[0003] Therefore, it is necessary to improve the existing technology to solve the deficiencies of the existing technology. Summary of the Invention:

[0004] The present invention provides a control method for reducing the noise of an embedded refrigerator to solve the problems existing in the above-mentioned prior art. While ensuring the temperature inside the box, it tries to reduce the noise of the embedded refrigerator.

[0005] The technical solution adopted by the present invention is as follows: A control method for reducing the noise of an embedded refrigerator, the steps are as follows:

[0006] Step 1: When the refrigerator is powered on and operates under the condition that the ambient temperature is Th, the ambient humidity is HUM, and the set temperature value of the refrigerator compartment remains unchanged, at this time, set the operating values of the compressor speed gear, the condenser fan speed gear, and the evaporator fan speed gear.

[0007] Step 2: After power-on and operation for more than 12 hours, judge the difference between the condenser outlet temperature TL and the ambient temperature Th.

[0008] Step 3: If the difference between the condenser outlet temperature TL and the ambient temperature Th ≤ 8°C, simultaneously downshift the compressor speed, the condenser fan speed, and the evaporator fan speed to the next gear.

[0009] Step 4: Taking every 12 hours as a cycle, if the startup rate of the compressor within the cycle reaches 90% but is lower than 100%, the refrigerator operates normally at the gear position in Step 3.

[0010] Step 5: If the startup rate of the compressor does not reach 90%, the gear position in Step 3 is synchronously reduced to the next gear position, and so on until the refrigerator meets the requirement that the 12-hour cycle reaches 90% but is lower than 100%, so as to ensure the stable operation of the compressor speed Rn, the evaporator fan speed Fn, and the condenser fan speed Ln.

[0011] Step 6: If the difference between the condenser outlet temperature TL and the ambient temperature Th > 8°C, taking every 12 hours as a cycle, if the startup rate of the compressor within the cycle reaches 90% but is lower than 100%, the refrigerator continues to operate normally at the gear position in Step 1.

[0012] Step 7: If the startup rate of the compressor within the cycle reaches 100%, it is considered that the gear position in Step 1 cannot meet the performance requirements, then the gear position in Step 1 is upshifted to the previous gear position. After running for a 12-hour cycle, judge the startup rate. If the startup rate still does not reach 90% but is lower than 100%, continue to increase the values of the compressor speed gear position, the condenser fan speed gear position, and the evaporator fan speed gear position until the startup rate within the cycle meets 90% but is lower than 100%, so as to ensure the continued stable operation of the compressor speed Rn, the evaporator fan speed Fn, and the condenser fan speed Ln.

[0013] Furthermore, set the compressor speeds as R1, R2…R10, and the compressor speed ranges from 1200 r / min to 4500 r / min.

[0014] Furthermore, set the condenser fan speeds as L1, L2…L10, and the condenser fan speed ranges from 1100 r / min to 2100 r / min.

[0015] Furthermore, set the evaporator fan speeds as F1, F2…F10, and the evaporator fan speed ranges from 1100 r / min to 1600 r / min.

[0016] Furthermore, set the compressor speed in Step 1 as R6, the condenser fan speed as L6, and the evaporator fan speed as F6.

[0017] The present invention has the following beneficial effects: The control method for reducing the noise of the built-in refrigerator of the present invention can identify the user's usage situation at a relatively low cost, judge whether the product is working in a working environment with poor ventilation such as a poorly ventilated or built-in environment, and scientifically and dynamically control the working conditions of the compressor, the evaporator fan, and the condenser fan on the premise of ensuring the performance of the refrigerator, so as to minimize the noise. Specific embodiments:

[0018] The control method for reducing the noise of the built-in refrigerator of the present invention is as follows:

[0019] Step 1: When the refrigerator is powered on and running under the conditions of constant ambient temperature Th, ambient humidity HUM, and set value of the refrigerator compartment temperature, the operating values of the compressor speed gear, condenser fan speed gear, and evaporator fan speed gear are set at this time;

[0020] At this time, the compressor speeds are set as R1, R2…R10, and the compressor speed is between 1200r / min and 4500r / min; the condenser fan speeds are L1, L2…L10, and the condenser fan speed is between 1100r / min and 2100r / min; the evaporator fan speeds are F1, F2…F10, and the evaporator fan speed is between 1100r / min and 1600r / min. The larger the value, the higher the corresponding speed;

[0021] According to the operating condition logic, a medium-performance operating value is given, such as: R6, F6, L6. This operating condition can ensure that when the ventilation condition is good and after stable operation, while meeting the internal temperature of the refrigerator, the starting rate of the compressor is below 70%;

[0022] Step 2: After power-on and running for more than 12 hours, judge the difference between the condenser outlet temperature TL and the ambient temperature Th;

[0023] Step 3: If the difference between the condenser outlet temperature TL and the ambient temperature Th ≤ 8°C, the compressor speed, condenser fan speed, and evaporator fan speed are simultaneously downshifted to the next gear;

[0024] Step 4: Taking every 12 hours as a cycle, if the starting rate of the compressor in the cycle reaches 90% and is lower than 100%, the refrigerator operates normally according to the gear in Step 3;

[0025] Step 5: If the starting rate of the compressor does not reach 90%, the gear in Step 3 is synchronously downshifted to the next gear, and so on until the refrigerator meets the requirement that the 12-hour cycle reaches 90% and is lower than 100%, and Rn, Fn, and Ln are obtained for stable operation;

[0026] Step 6: If the difference between the condenser outlet temperature TL and the ambient temperature Th > 8°C, taking every 12 hours as a cycle, if the starting rate of the compressor in the cycle reaches 90% and is lower than 100%, the refrigerator continues to operate normally according to the gear in Step 1;

[0027] Step 7: If the startup rate of the compressor within a cycle reaches 100%, it is considered that the gear in Step 1 cannot meet the performance requirements. Then, the gear in Step 1 is upshifted to the previous gear, and the startup rate is judged after running for a 12-hour cycle. If the startup rate has not reached 90% and is lower than 100%, the values of the compressor speed gear, condenser fan speed gear, and evaporator fan speed gear are continuously increased until the startup rate within the cycle meets the requirement of being 90% and lower than 100%, and then Rn, Fn, and Ln are obtained and the stable operation is continued.

[0028] For the control method of reducing the noise of the built-in refrigerator in the present invention, under the working condition of good ventilation, after the refrigerator works for a certain period of time, generally about 12 hours, the refrigerant outlet temperature of the condenser will be controlled below the ambient temperature + 8°C. At this time, the present invention will determine that the refrigerator is currently in the working condition of good ventilation, and will combine the startup rate of the compressor to reduce the speeds of the freezer fan, compressor, and condenser fan to reduce the noise. When it is detected that the startup rate of the compressor rises to a certain value, the speeds of the three components are gradually increased to meet the performance requirements. After the refrigerator works for a certain period of time, generally about 12 hours, in an environment with poor ventilation, the outlet temperature of the external condenser is likely to exceed the ambient temperature + 8°C. At this time, the present invention will consider that the refrigerator is in a built-in working environment with poor ventilation, and will judge whether it is necessary to increase the speeds of the compressor, evaporator fan, and condenser fan according to the startup rate at this time to meet the performance requirements of the refrigerator.

[0029] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A control method for reducing the noise of an embedded refrigerator, characterized in that: The steps are as follows: Step 1: When the refrigerator is powered on and operating with the ambient temperature Th, ambient humidity HUM, and the set temperature of the refrigerator compartment remaining unchanged, set the operating values of the compressor speed gear, condenser fan speed gear, and evaporator fan speed gear at this time; Step 2: After power-on and operation for more than 12 hours, judge the difference between the condenser outlet temperature TL and the ambient temperature Th; Step 3: If the difference between the condenser outlet temperature TL and the ambient temperature Th is ≤ 8°C, simultaneously downshift the compressor speed, condenser fan speed, and evaporator fan speed to the next gear; Step 4: Taking every 12 hours as a cycle, if the compressor startup rate within the cycle reaches 90% but is lower than 100%, the refrigerator operates normally at the gear in Step 3; Step 5: If the compressor startup rate does not reach 90%, the gear in Step 3 is synchronously downshifted to the next gear, and so on until the refrigerator meets the requirement that the 12-hour cycle reaches 90% but is lower than 100%, obtaining stable operation of the compressor speed Rn, evaporator fan speed Fn, and condenser fan speed Ln; Step 6: If the difference between the condenser outlet temperature TL and the ambient temperature Th > 8°C, taking every 12 hours as a cycle, if the compressor startup rate within the cycle reaches 90% but is lower than 100%, the refrigerator continues to operate normally at the gear in Step 1; Step 7: If the compressor startup rate within the cycle reaches 100%, it is considered that the gear in Step 1 cannot meet the performance requirements, then upshift the gear in Step 1 to the previous gear, judge the startup rate after operating for a 12-hour cycle. If the startup rate still does not reach 90% but is lower than 100%, continue to increase the values of the compressor speed gear, condenser fan speed gear, and evaporator fan speed gear until the startup rate within the cycle meets 90% but is lower than 100%, obtaining stable operation of the compressor speed Rn, evaporator fan speed Fn, and condenser fan speed Ln continued.

2. The control method for reducing the noise of an embedded refrigerator according to claim 1, characterized in that: Set the compressor speeds as R1, R2…R10, and the compressor speed ranges from 1200 r / min to 4500 r / min.

3. The control method for reducing the noise of an embedded refrigerator according to claim 2, wherein: Set the condenser fan speeds as L1, L2…L10, and the condenser fan speed ranges from 1100 r / min to 2100 r / min.

4. The control method for reducing the noise of an embedded refrigerator according to claim 3, characterized in that: Set the evaporator fan speeds as F1, F2…F10, and the evaporator fan speed ranges from 1100 r / min to 1600 r / min.

5. The control method for reducing the noise of an embedded refrigerator according to claim 4, wherein: Set the compressor speed in Step 1 as R6, the condenser fan speed as L6, and the evaporator fan speed as F6.