CN113074488A - Refrigeration appliance with intelligent silencing function and control method - Google Patents
Refrigeration appliance with intelligent silencing function and control method Download PDFInfo
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- CN113074488A CN113074488A CN202110487287.5A CN202110487287A CN113074488A CN 113074488 A CN113074488 A CN 113074488A CN 202110487287 A CN202110487287 A CN 202110487287A CN 113074488 A CN113074488 A CN 113074488A
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- compressor
- controller
- box
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- refrigerator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a refrigeration appliance with an intelligent mute function and a control method, wherein the refrigeration appliance comprises a vertical box body and a door body, a refrigeration system and a controller are arranged in the vertical box body, the refrigeration system comprises a variable frequency compressor, an evaporator and a condenser, and the refrigeration appliance is characterized in that: the top of the vertical box body is provided with a human body sensor, the controller calculates the moving distance of a person according to a sensing signal transmitted by the human body sensor, and when the moving distance of the person is smaller than a first set distance value, the operating frequency of the variable frequency compressor is controlled not to be higher than the first frequency, or the current operating frequency of the variable frequency compressor is reduced. When the invention detects that people move around the refrigerator, the refrigerator automatically enters a low-noise mode, the user experience is good, the improvement of the living standard of people is facilitated, and the invention has the advantages of simple and reasonable structure, easy production, safety, reliability, strong practicability and the like.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a refrigeration appliance with an intelligent silencing function and a control method.
Background
Common refrigerators comprise a refrigerator, a freezer, a wine cabinet and the like, and are widely applied because the refrigerator can provide a stable storage environment with a proper temperature and humidity range, taking a household refrigerator as an example, in a modern household, the refrigerator becomes one of necessary household appliances, along with the continuous development of refrigerator technology, the functions of the refrigerator are not only limited to providing a refrigerating space, for example, the Chinese utility model with the publication number of CN206420244U discloses a refrigerator with home security, which utilizes the characteristics that the refrigerator is electrified for a long time in the life of a family for 24 hours, has large weight, is not easy to move and has proper height and size, combines the wireless information receiving and sending modes of a router and a smart phone to endow the refrigerator with the security function, can detect the walking condition of people in the family, and can automatically send a warning to the smart phone when the smart refrigerator is in a monitoring mode and people walk away from the smart refrigerator, the user can open the camera through the smart mobile phone to the condition in front of real time monitoring intelligent refrigerator makes the user grasp and prevent burglary at any time effectively to the condition at home under the condition that does not need to increase input and complicated construction. In order to realize the security protection function, the refrigerator need set up security protection control program on the main control board, and need add infrared human sensor and wireless connection module, wireless connection module is used for intelligent refrigerator and router interconnect, and send out the detection signal of infrared human sensor and receive the opening signal of opening the camera that the smart mobile phone sent through wireless network, infrared human sensor is used for responding to being close of intelligent refrigerator the place ahead object, and produce the detection signal when the object blocks, the camera is used for the condition in control intelligent refrigerator the place ahead. Under the circumstances of the prior art, the inventor of the present application has desired to use an infrared human body sensor mounted on a refrigerator, and when it detects that a person approaches a refrigerator, a controller reduces operating noise of the refrigerator through a built-in program, thereby providing a mute function to the refrigerator and other refrigerators.
Disclosure of Invention
The invention aims to provide a refrigeration appliance with an intelligent mute function and a control method thereof, which have the advantage of intelligent mute control, and reduce the running noise of a refrigerator when a person approaches, so that consumers are not interfered by the noise of the refrigerator, and the defects of the prior art are overcome.
The invention adopts the following technical scheme to realize the purpose: the utility model provides a refrigeration utensil with intelligence silence function, refrigeration utensil includes vertical box, the door body, be equipped with refrigerating system and controller in the vertical box, refrigerating system includes inverter compressor, evaporimeter and condenser, its characterized in that: the top of the vertical box body is provided with a human body sensor, the controller calculates the moving distance of a person according to a sensing signal transmitted by the human body sensor, and when the moving distance of the person is smaller than a first set distance value, the operating frequency of the variable frequency compressor is controlled not to be higher than the first frequency, or the current operating frequency of the variable frequency compressor is reduced.
The controller also includes a clock circuit, and the controller controls the compressor not to run at a frequency higher than the second frequency during the set sleep period.
The box body also comprises an ambient temperature sensing head, and when the moving distance of a person is smaller than a first set distance value, the controller reduces the current operating frequency of the variable frequency compressor according to different descending ranges according to a temperature interval where an ambient temperature value transmitted by the ambient temperature sensing head is located.
The human body sensor is an infrared human body sensor or a radar.
The back of the box body is provided with a controller mounting box, the ambient temperature sensor and the controller are both mounted in the controller mounting box, and the controller mounting box is covered and sealed by a controller box cover.
The back plate apex angle of box has the breach, and the both sides limit of controller mounting box is equipped with L shape frid, and L shape frid forms the draw-in groove with the outer fringe board of controller mounting box, the both sides edge of breach inserts in the draw-in groove.
A limiting through groove is formed in the base plate of the L-shaped groove plate, and a limiting plate of the rear plate penetrates through the limiting through groove from the clamping groove.
The middle part of the controller mounting box is a circuit board mounting cavity, the edge of the circuit board mounting cavity is provided with a coaming, the top of the controller mounting box is provided with a cantilever plate, the two sides of the cantilever plate are connected with the outer coaming of the controller mounting box and are provided with grooves, the cantilever plate is connected with the coaming through elastic arms and forms an elastic arm groove with the coaming, and the cantilever plate is provided with a plurality of lugs.
The above has intelligenceThe control method of the refrigeration appliance with the mute function is characterized by comprising the following steps: s1) the human body sensor sends the sensing signal to the controller; s2), the controller calculates the human body movement distance, and when the human body movement distance is smaller than a first set distance value, the running frequency of the current compressor is detected; s3) if the running frequency of the compressor is more than the highest rotating speed N of the compressormaxAnd controlling the compressor to run at the highest rotating speed of the compressor, and executing at the current rotating speed if the current running frequency of the compressor is reduced to the highest rotating speed of the compressor.
Wherein N ismax=a×210+1300，a= (Thi-20)/2 and rounded, ThiIs the instant ambient temperature.
The invention adopts the technical proposal to achieve the following beneficial effects:
1) when the invention detects that people move around the refrigerator, the refrigerator automatically enters a low-noise mode, the user experience is good, the improvement of the living standard of people is facilitated, and the invention has the advantages of simple and reasonable structure, easy production, safety, reliability, strong practicability and the like.
2) The invention can also add a router and a smart phone on the basis of arranging the human body monitoring sensor, and add a security program on the controller, thereby increasing the home security function of the refrigeration appliance, so that the refrigeration appliance has multiple purposes.
Drawings
Fig. 1 is a schematic structural diagram of a refrigeration appliance with an intelligent silencing function according to the present invention.
Fig. 2 is a partial structure view of the back of the refrigerator body of the invention.
Fig. 3 is a schematic structural view of the controller mounting box of the present invention.
Fig. 4 is a sectional view of the controller mounting box of the present invention.
Fig. 5 is a partially sectional view of a mounting structure of the controller mounting box of the present invention on the cabinet.
Fig. 6 is a schematic diagram of the controller box cover structure of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples.
Detailed description of the invention
As shown in fig. 1, the present invention discloses a refrigerator with an intelligent mute function, the refrigerator 10 includes a box body and a door body, a compressor bin is arranged at the rear bottom of the box body, a compressor is arranged in the compressor bin, a compressor bin cover is provided with a plurality of ventilation openings for heat dissipation, even some users can take off the compressor bin cover when using, therefore, when the compressor is running, the running noise of the compressor can be generally transmitted through the ventilation openings, and the decibel value is higher, especially at night, the sleeping time is more obvious, causing the user to feel uncomfortable, and the refrigerator manufacturer can also receive complaints about the overhigh noise of the refrigerator. At present, the variable frequency compressor is widely used in the refrigerator with larger volume, and the operation noise of the compressor is generally proportional to the operation frequency thereof, when the compressor operates at high frequency, the noise is larger, and when the compressor operates at low frequency, the noise is relatively smaller. Therefore, the infrared human body sensor 20 or the radar is arranged at the top of the refrigerator body of the refrigeration appliance, the periphery of the refrigerator is monitored through the infrared human body sensor or the radar, and when human body movement is detected around the refrigerator, the rotating speed of the compressor is properly reduced on the premise of ensuring the refrigeration effect, and the noise sensed by a human body is reduced. The method comprises the following steps:
an ambient temperature sensor is arranged in a compressor bin of the refrigerator and used for detecting an ambient temperature value Th. The central processing unit receives the information whether the human body sensor sends, judges whether the received information whether the human body sensor sends, if the human body sensor detects a human body, calculates the distance from the human body to the refrigerator body, compares the calculation result with the frequency reduction distance value set in the data storage, and if the distance from the human body to the refrigerator is smaller than the frequency reduction distance set value, the central processing unit respectively sends a control instruction to the compressor control module and the fan control module (if the refrigerator does not adopt the fan motor to drive the air circulation of the refrigerator body, the fan control module does not output); the compressor and the fan are controlled according to the following rules:
s1) calculating the maximum rotating speed limit of the compressorValue Nmax，Nmax= a × 210+1300, where a = (Th)i-20)/2, a is an integer, ThiIs the current ambient temperature value.
S2) comparing the current compressor running frequency with the current compressor running frequency, and if the current actual compressor rotating speed is higher than NmaxThen press NmaxExecuting, the current rotating speed of the left path compressor is lower than NmaxIt is executed at the current rotation speed.
When the frequency of the compressor changes, the controller correspondingly adjusts the rotating speed of the fan.
When the compressor is properly reduced in rotation speed due to the movement of human bodies around the compressor, the temperature set by the control panel of the refrigerator is kept unchanged, the refrigerator still operates according to the set temperature, but the working time of the compressor is increased due to the reduction of the rotation speed, and the on-off ratio of the compressor is increased. This variation is a more energy efficient way of operating an inverter compressor, since frequent compressor starts are reduced.
The compressor speed control is exemplified as follows:
when the ring temperature is 25 ℃, the ring temperature factor a =3, N is calculatedmax1930RPM is taken as the compressor speed.
When the ring temperature is 16 ℃, the ring temperature factor a = -2, N is calculatedmaxAnd the rotation speed of the compressor is 1300RPM by means of the number of the 880RPM < 1300 RPM.
The lowest rotation speed of the existing inverter compressor is generally 1300RPM, and the highest rotation speed is 4500 RPM.
Detailed description of the invention
Considering that the ambient noise at night is low, the human ear is more sensitive to sound, and the noise has adverse effect on the sleeping quality of the user, the controller adds a clock circuit, and controls the compressor not to operate at the second frequency in the set sleeping time period. The method comprises the following steps: a clock circuit is added in the controller, and the rotating speed of the compressor does not exceed 2500 revolutions within a time period of 22:00 to 06:00 the next day. Or the rotating speed of the compressor does not exceed 2500 revolutions within the time period of 22:00 to 01:00 of the next day, so that the noise of the compressor is low in the normal sleep time period.
The rest of the structure and control rules of the refrigerator are the same as the technical solutions commonly used in the prior art, and will not be described herein.
Detailed description of the invention
On the basis of the first embodiment, the ambient temperature sensor and the controller are arranged at the top of the back of the refrigerator body. Can reduce the length of electrical connection line, moreover, box top air is dry and comfortable than the compressor storehouse, also is favorable to electric component to work for a long time steadily.
Referring to fig. 2-6, a controller mounting box 5 is assembled on a rear plate 4 of a refrigerator body, the controller mounting box is embedded in a bubble layer on the top of the back of the refrigerator body, a controller (not shown) of the refrigerator and an ambient temperature sensor (not shown) are mounted in the controller mounting box, and then the controller mounting box is covered by a controller box cover 1.
There is the breach on the apex angle of backplate 4, and controller mounting box 5 installs on the breach of backplate 4, and the both sides limit of controller mounting box 5 is equipped with L shape frid 52, and L shape frid 52 forms the draw-in groove with the outer fringe board of controller mounting box 5, and the both sides edge of breach inserts in the draw-in groove, and the hatching in figure 3 shows the area that the both sides limit of breach inserted the draw-in groove. Be equipped with spacing logical groove 51 on the base plate of the L-shaped frid 52 of controller mounting box 5 bottom, the spacing board 41 that upwards stands out on the breach bottom of backplate 4, and spacing logical groove 51 is passed from the draw-in groove to limiting board 41 to prevent that controller mounting box 5 from breaking away from backplate 4.
The top edge and the lateral part edge of a controller mounting box 5 are clamped tightly by a top plate flanging 2 and a lateral plate flanging 3 of a box body 10, a circuit board mounting cavity is arranged in the middle of the controller mounting box 5, a coaming 6 is arranged at the edge of the cavity, a cantilever plate 53 is arranged above the top of the controller mounting box and the coaming 6, the cantilever plate 53 is connected with a guide inclined plate 8, grooves 7 are formed in the two sides of the cantilever plate 53 and connected with the controller mounting box, and the grooves 7 are also located at the two ends of the guide inclined plate 8. The cantilever plate 53 and the inclined guide plate 8 are connected to the apron 6 by an elastic arm, and an elastic arm groove 54 is formed with the apron 6, so that when the cantilever plate 53 is pressed, the cantilever plate 53 can be slightly deformed, and the controller case cover 1 can be inserted and clamped by the deformation. The top of controller mounting box 5 (including cantilever plate 53) inserts in the U-shaped interlayer of roof turn-ups 2, the shaping has cardboard 12 at the top of controller box lid 1 of buckling, the both sides of cardboard 12 are 90 degrees fashioned cardboard spacing 13 of buckling, the spacing width of two cardboards is the same with the interval of two recesses 7, aim at recess 7 with the spacing 13 of cardboard, and press cantilever plate 53 with cardboard 12 along guide swash plate 8 slant, make cardboard 12 insert in mounting groove 21 and form the interference fit relation. The cantilever plate 53 is provided with a plurality of protrusions 531 to make the card 12 be clamped more tightly, and the friction force generated by the clamping force overcomes the self-weight of the controller box cover 1, so that the card cannot fall from the mounting groove 21.
The breach base both sides of back plate 4 are equipped with screw plate portion 42, screw plate portion 42 has through-hole 421, it is equipped with the screw post to correspond through-hole 421 in the bottom of controller mounting box 5, vertical next-door neighbour has arranged three to five screw holes in the screw post, the bottom of controller box lid 1 corresponds through-hole 421 and is equipped with sunken formula box lid hole 11, after cardboard 12 is pressed from both sides at mounting groove 21, the workman can vacate the both hands and squeeze into the arbitrary screw hole of controller mounting box 5 with the screw, thereby fix controller box lid 1 installation on the back plate.
The refrigerator has an intelligent mute function, when a user moves in a living room in a short distance or sleeps at night, the refrigerator automatically reduces the operating frequency of the variable frequency compressor, and if the temperature of the refrigerator is adjusted by the fan in the refrigerator, the rotating speed of the fan is further automatically reduced, so that the noise generated by the refrigerator is automatically reduced, and the user experience is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. The utility model provides a refrigeration utensil with intelligence silence function, refrigeration utensil includes vertical box, the door body, be equipped with refrigerating system and controller in the vertical box, refrigerating system includes inverter compressor, evaporimeter and condenser, its characterized in that: the top of the vertical box body is provided with a human body sensor, the controller calculates the moving distance of a person according to a sensing signal transmitted by the human body sensor, and when the moving distance of the person is smaller than a first set distance value, the operating frequency of the variable frequency compressor is controlled not to be higher than the first frequency, or the current operating frequency of the variable frequency compressor is reduced.
2. A refrigerator appliance with intelligent mute function as claimed in claim 1, wherein: the controller also includes a clock circuit, and the controller controls the compressor not to run at a frequency higher than the second frequency during the set sleep period.
3. A refrigerator appliance with intelligent mute function as claimed in claim 1, wherein: the box body also comprises an ambient temperature sensing head, and when the moving distance of a person is smaller than a first set distance value, the controller reduces the current operating frequency of the variable frequency compressor according to different descending ranges according to a temperature interval where an ambient temperature value transmitted by the ambient temperature sensing head is located.
4. A refrigerator appliance with intelligent mute function as claimed in claim 3, wherein: the human body sensor is an infrared human body sensor or a radar.
5. A refrigerator appliance with intelligent muting function according to claim 4, characterized in that: the back of the box body is provided with a controller mounting box, the ambient temperature sensor and the controller are both mounted in the controller mounting box, and the controller mounting box is covered and sealed by a controller box cover.
6. A refrigerator appliance with intelligent mute function as claimed in claim 5, wherein: the back plate apex angle of box has the breach, and the both sides limit of controller mounting box is equipped with L shape frid, and L shape frid forms the draw-in groove with the outer fringe board of controller mounting box, the both sides edge of breach inserts in the draw-in groove.
7. A refrigerator appliance with intelligent mute function as claimed in claim 6, wherein: a limiting through groove is formed in the base plate of the L-shaped groove plate, and a limiting plate of the rear plate penetrates through the limiting through groove from the clamping groove.
8. A refrigerator appliance with intelligent muting function according to claim 5, 6 or 7, characterized in that: the middle part of the controller mounting box is a circuit board mounting cavity, the edge of the circuit board mounting cavity is provided with a coaming, the top of the controller mounting box is provided with a cantilever plate, the two sides of the cantilever plate are connected with the outer coaming of the controller mounting box and are provided with grooves, the cantilever plate is connected with the coaming through elastic arms and forms an elastic arm groove with the coaming, and the cantilever plate is provided with a plurality of lugs.
9. The control method of a refrigeration appliance with intelligent silencing function according to claim 4, characterized by comprising the following steps:
s1) the human body sensor sends the sensing signal to the controller;
s2), the controller calculates the human body movement distance, and when the human body movement distance is smaller than a first set distance value, the running frequency of the current compressor is detected;
s3) if the running frequency of the compressor is more than the highest rotating speed N of the compressormaxAnd controlling the compressor to run at the highest rotating speed of the compressor, and executing at the current rotating speed if the current running frequency of the compressor is reduced to the highest rotating speed of the compressor.
10. A control method for a cooling appliance with an intelligent mute function according to claim 9, wherein: n is a radical ofmax=a×210+1300，a= (Thi-20)/2 and rounded, ThiIs the instant ambient temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110487287.5A CN113074488A (en) | 2021-05-05 | 2021-05-05 | Refrigeration appliance with intelligent silencing function and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110487287.5A CN113074488A (en) | 2021-05-05 | 2021-05-05 | Refrigeration appliance with intelligent silencing function and control method |
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| Publication Number | Publication Date |
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| CN113074488A true CN113074488A (en) | 2021-07-06 |
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ID=76616154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110487287.5A Withdrawn CN113074488A (en) | 2021-05-05 | 2021-05-05 | Refrigeration appliance with intelligent silencing function and control method |
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| CN (1) | CN113074488A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11166779A (en) * | 1997-08-26 | 1999-06-22 | Daewoo Electron Co Ltd | Low noise operating method for refrigerator |
| KR20060123925A (en) * | 2005-05-30 | 2006-12-05 | 삼성전자주식회사 | Noise reduction method for refrigerator |
| CN105627647A (en) * | 2016-02-26 | 2016-06-01 | 合肥美菱股份有限公司 | Automatic silent refrigerator with inverter and running control method of automatic silent refrigerator with inverter |
| CN106288641A (en) * | 2016-08-29 | 2017-01-04 | 合肥美菱股份有限公司 | A kind of based on infrared refrigerator noise-reduction method |
| CN108195133A (en) * | 2017-12-29 | 2018-06-22 | Tcl家用电器（合肥）有限公司 | A kind of refrigerator and its control method, control device |
| CN108626963A (en) * | 2018-04-19 | 2018-10-09 | 长虹美菱股份有限公司 | A kind of refrigerator DNR dynamic noise reduction control method |
| CN110671885A (en) * | 2019-10-08 | 2020-01-10 | 长虹美菱股份有限公司 | Frequency conversion energy-saving low-noise refrigerator |
| CN110736284A (en) * | 2019-10-30 | 2020-01-31 | 南京创维家用电器有限公司 | control method for improving use noise of intelligent air-cooled variable frequency refrigerator |
-
2021
- 2021-05-05 CN CN202110487287.5A patent/CN113074488A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11166779A (en) * | 1997-08-26 | 1999-06-22 | Daewoo Electron Co Ltd | Low noise operating method for refrigerator |
| KR20060123925A (en) * | 2005-05-30 | 2006-12-05 | 삼성전자주식회사 | Noise reduction method for refrigerator |
| CN105627647A (en) * | 2016-02-26 | 2016-06-01 | 合肥美菱股份有限公司 | Automatic silent refrigerator with inverter and running control method of automatic silent refrigerator with inverter |
| CN106288641A (en) * | 2016-08-29 | 2017-01-04 | 合肥美菱股份有限公司 | A kind of based on infrared refrigerator noise-reduction method |
| CN108195133A (en) * | 2017-12-29 | 2018-06-22 | Tcl家用电器（合肥）有限公司 | A kind of refrigerator and its control method, control device |
| CN108626963A (en) * | 2018-04-19 | 2018-10-09 | 长虹美菱股份有限公司 | A kind of refrigerator DNR dynamic noise reduction control method |
| CN110671885A (en) * | 2019-10-08 | 2020-01-10 | 长虹美菱股份有限公司 | Frequency conversion energy-saving low-noise refrigerator |
| CN110736284A (en) * | 2019-10-30 | 2020-01-31 | 南京创维家用电器有限公司 | control method for improving use noise of intelligent air-cooled variable frequency refrigerator |
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Application publication date: 20210706 |
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