CN113915830A - Refrigerator and compressor starting method - Google Patents
Refrigerator and compressor starting method Download PDFInfo
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- CN113915830A CN113915830A CN202110633224.6A CN202110633224A CN113915830A CN 113915830 A CN113915830 A CN 113915830A CN 202110633224 A CN202110633224 A CN 202110633224A CN 113915830 A CN113915830 A CN 113915830A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005461 lubrication Methods 0.000 claims abstract description 13
- 238000005057 refrigeration Methods 0.000 claims abstract description 6
- 230000003139 buffering effect Effects 0.000 claims description 30
- 230000001133 acceleration Effects 0.000 claims description 27
- 239000003507 refrigerant Substances 0.000 claims description 17
- 230000008859 change Effects 0.000 abstract description 17
- 230000005236 sound signal Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 12
- 230000006872 improvement Effects 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000001052 transient effect Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008447 perception Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
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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
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- 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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
-
- 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
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
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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
- F25D2201/00—Insulation
- F25D2201/30—Insulation with respect to sound
-
- 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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention discloses a refrigerator, comprising: a cabinet including a plurality of storage compartments; a door provided at an opening of the storage chamber; a compressor for providing power to a refrigeration cycle of the refrigerator; the frequency converter is configured to: responding to a starting signal sent by a main control board, and controlling the compressor to operate at a buffer rotating speed; when the compressor runs for a preset buffer running time, the rotating speed of the compressor is adjusted to the oiling rotating speed; the oiling rotating speed is the rotating speed which needs to be reached for ensuring the running lubrication of the compressor during oiling, and the oiling rotating speed is greater than the buffer rotating speed; and controlling the compressor to operate at the oil rotating speed for a preset oil applying operation time so as to finish the starting. The invention also discloses a starting method of the compressor. By adopting the embodiment of the invention, the problem of noise caused by the change of the actual rotating speed of the instantaneous starting variable frequency compressor of the variable frequency compressor can be considered, and the stability of the sound signal is improved by planning the rotating speed change time of the variable frequency compressor, so that the starting sound of the refrigerator is more comfortable.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator and a compressor starting method.
Background
The refrigerator is quite popular in China society, and with the development of relevant technologies of the refrigerator, the requirements of people on the refrigerator are increasingly improved, wherein the most important is silence and energy conservation. With the increase of the population of domestic cities and the development of compact houses, the use places of household refrigeration appliances such as refrigerators, freezers and the like are not limited to kitchens and storerooms, more users place the household refrigeration appliances in living rooms or even bedrooms, the noise problem is gradually highlighted, the transient noise mutation of the refrigerators is the real perception of the users to the noise of the refrigerators no matter in the national standard of noise testing or in the enterprise standards of various brands, and the transient noise of the compressors is one of the main problems influencing the subjective perception of the users to the noise due to the sudden change, the large absolute noise and the high fluctuation degree of the transient noise of the compressors.
The inverter compressor is accepted by more and more users due to the advantages of convenience in temperature control, energy conservation and the like, and more inverter compressor products are available in the refrigerator industry. The start and stop of the refrigerator variable frequency compressor are controlled according to the logical relation between the set temperature and the actual temperature in the refrigerator or between the ambient temperature and the actual temperature in the refrigerator, so that the refrigerator variable frequency compressor can be started and stopped for many times every day. The inverter compressor starts the instant, because system pressure instantaneous change and rotor rotate inertia, cause the inverter compressor to start the noise fluctuation of the instant more obvious, this kind of transient noise is very easy by user's perception, and the mode of making an uproar falls in current refrigerator all is to falling the noise of compressor in the operation process, does not consider falling the noise at the compressor start moment.
Disclosure of Invention
The embodiment of the invention aims to provide a refrigerator and a compressor starting method, which can consider the problem of noise caused by the change of the actual rotating speed of an instantaneous variable frequency compressor when the variable frequency compressor is started, and improve the stability of sound signals by planning the rotating speed change time of the variable frequency compressor, so that the starting sound of the refrigerator is more comfortable.
To achieve the above object, an embodiment of the present invention provides a refrigerator, including:
a cabinet including a plurality of storage compartments;
a door provided at an opening of the storage chamber;
a compressor for providing power to a refrigeration cycle of the refrigerator;
the frequency converter is configured to:
responding to a starting signal sent by a main control board, and controlling the compressor to operate at a preset buffer rotating speed;
when the compressor runs at the buffering rotating speed for a preset buffering running time, the rotating speed of the compressor is adjusted from the buffering rotating speed to a preset oiling rotating speed; the oiling rotating speed is the rotating speed which needs to be reached for ensuring the running lubrication of the compressor during oiling, and the oiling rotating speed is greater than the buffering rotating speed;
and controlling the compressor to run for a preset oiling running time at the oiling rotating speed so as to finish the starting of the compressor.
As an improvement of the above, the frequency converter is further configured to:
when the compressor finishes starting, a starting completion signal is sent to the main control board;
then, the master control board is configured to:
and adjusting the oiling rotating speed of the compressor to a target rotating speed until a stop signal is detected.
As an improvement of the above solution, the buffer run time is less than or equal to the maximum operation time of the compressor allowed to be unlisted; the oiling running time is more than or equal to the time of the stable circulation of the refrigerant and the time of the sufficient oiling of the compressor.
As an improvement of the above scheme, the adjusting the rotation speed of the compressor from the buffer rotation speed to a preset oiling rotation speed includes:
and adjusting the rotating speed of the compressor from the buffer rotating speed to a preset oiling rotating speed at a preset first acceleration.
As an improvement of the above scheme, the adjusting the oiling rotation speed of the compressor to the target rotation speed includes:
and adjusting the oiling rotating speed of the compressor to a target rotating speed at a preset second acceleration.
In order to achieve the above object, an embodiment of the present invention further provides a compressor starting method, including:
responding to a starting signal sent by a main control panel of the refrigerator, and controlling the compressor to run at a preset buffer rotating speed;
when the compressor runs at the buffering rotating speed for a preset buffering running time, the rotating speed of the compressor is adjusted from the buffering rotating speed to a preset oiling rotating speed; the oiling rotating speed is the rotating speed which needs to be reached for ensuring the running lubrication of the compressor during oiling, and the oiling rotating speed is greater than the buffering rotating speed;
and controlling the compressor to run for a preset oiling running time at the oiling rotating speed so as to finish the starting of the compressor.
As an improvement of the above, the method further comprises:
and when the compressor finishes starting, sending a starting completion signal to the main control board so that the main control board adjusts the oiling rotating speed of the compressor to a target rotating speed until a stop signal is detected.
As an improvement of the above solution, the buffer run time is less than or equal to the maximum operation time of the compressor allowed to be unlisted; the oiling running time is more than or equal to the time of the stable circulation of the refrigerant and the time of the sufficient oiling of the compressor.
As an improvement of the above scheme, the adjusting the rotation speed of the compressor from the buffer rotation speed to a preset oiling rotation speed includes:
and adjusting the rotating speed of the compressor from the buffer rotating speed to a preset oiling rotating speed at a preset first acceleration.
As an improvement of the above scheme, the adjusting the oiling rotation speed of the compressor to the target rotation speed includes:
and adjusting the oiling rotating speed of the compressor to a target rotating speed at a preset second acceleration.
Compared with the prior art, the refrigerator and the compressor starting method disclosed by the embodiment of the invention consider the noise problem caused by the change of the actual rotating speed of the variable frequency compressor at the starting moment of the variable frequency compressor in the angle of noise, and simultaneously research the change of the load of the variable frequency compressor by reducing the influence of overshoot and delay on the starting moment noise of the variable frequency compressor, so that the rotating speed change time of the variable frequency compressor is designed, the stability of a sound signal is improved, and the running sound of the refrigerator is more comfortable.
Drawings
FIG. 1 is a flowchart illustrating operation of a frequency converter in a refrigerator according to an embodiment of the present invention;
FIG. 2 is another flowchart illustrating operation of a frequency converter in a refrigerator according to an embodiment of the present invention;
FIG. 3 is a frequency sweep curve of a compressor at 1700rpm to 3000rpm according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the variation of the rotational speed of the compressor according to the embodiment of the present invention;
FIG. 5 is a comparison graph of noise curves at the start-up stage according to the embodiment of the present invention;
FIG. 6 is a graph illustrating the noise generated during the period when the rotational speed of the compressor is adjusted to the target rotational speed according to the embodiment of the present invention;
fig. 7 is a flowchart of a compressor starting method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The refrigerator of the embodiment of the invention comprises:
a cabinet including a plurality of storage compartments;
a door provided at an opening of the storage chamber;
a compressor for providing power to a refrigeration cycle of the refrigerator;
referring to fig. 1, the frequency converter is configured to:
s11, responding to the starting signal sent by the main control board, and controlling the compressor to run at a preset buffer rotating speed;
s12, when the compressor runs at the buffer rotating speed for a preset buffer running time, adjusting the rotating speed of the compressor from the buffer rotating speed to a preset oiling rotating speed; the oiling rotating speed is the rotating speed which needs to be reached for ensuring the running lubrication of the compressor during oiling, and the oiling rotating speed is greater than the buffering rotating speed;
and S13, controlling the compressor to run for a preset oiling running time at the oiling rotating speed so as to finish the starting of the compressor.
Specifically, the buffer running time t1 is less than or equal to the maximum running time of the compressor which is allowed to be ungelled completely; the oiling running time t2 is more than or equal to the time of the refrigerant stable circulation and the time of the compressor being fully oiled.
Illustratively, after the compressor is started, the rotating speed of the compressor is adjusted to be a buffering rotating speed, and transient noise caused by overshoot is reduced through the buffering rotating speed. The smaller the buffer rotation speed, the smaller the overshoot rotation speed, the smaller the corresponding noise, and the easier the rotation speed is stabilized. The buffer rotating speeds can be multiple, and the multi-stage buffer effect is more obvious for the variable frequency compressor with heavier movement (larger rotation inertia) and obvious overshoot.
When the compressor runs at the buffer rotating speed for the buffer running time t1, the rotating speed of the compressor is adjusted to the oiling rotating speed, lubrication is an important factor to be considered in the design of the reciprocating compressor, good lubrication can reduce friction and abrasion, the service life of the compressor is ensured, power consumption is reduced, and the effects of sealing, cooling and noise reduction are achieved. Lubricating oil is conveyed from the bottom of the compressor to the shaft flange, the bearing, the connecting rod, the piston and other parts by means of the oiling channel inside the crankshaft under the action of rotating centrifugal force, and the crankshaft of the compressor must reach certain rotation speed to ensure the lubrication of the compressor. Such as: the oiling rotating speed can be 1800 rpm-2400 rpm.
The oiling operation time t2 is mainly used for ensuring that noise is abnormal due to the change of the rotating speed of the inverter compressor under the action of large system pressure when the refrigerant is not circulated at the initial starting stage of the inverter compressor, and the design of the oiling operation time t2 conforms to the standard that the oiling rotating speed is maintained until after the refrigerant starts to circulate stably (the oiling operation time t2 can be determined according to the occurrence time of the eruption noise of the refrigerant). It is worth noting that t2 must be longer than the time for the compressor to oil completely, and although the time for the refrigerant to start the stabilization cycle is much longer than the time for oil completely, t2 must be longer than the time for oil completely in principle.
Further, adjusting the rotating speed of the compressor from the buffer rotating speed to a preset oiling rotating speed comprises:
and adjusting the rotating speed of the compressor from the buffer rotating speed to a preset oiling rotating speed at a preset first acceleration.
Illustratively, the first acceleration is relatively small, so that the overshoot generated when the frequency conversion compressor is increased from the buffer rotating speed to the oiling rotating speed is smaller. The selection of buffering rotational speed need guarantee that there is not resonance band between buffering rotational speed and the upper oil rotational speed, through resonance band when buffering rotational speed rises to the rotational speed that oils, then can produce the noise unusual, and the time of less first acceleration increase through resonance band simultaneously, unusual noise is perceived more easily. The first acceleration is as small as possible, so that the overcharge generated when the compressor reaches the oiling rotating speed is small, but the time required for the compressor to reach the oiling rotating speed needs to be considered, so that the service life of the compressor is prevented from being influenced, and the acceleration of 100 plus 200rpm per second can be selected.
Further, the frequency converter is further configured to:
when the compressor finishes starting, a starting completion signal is sent to the main control board;
then, the master control board is configured to:
and adjusting the oiling rotating speed of the compressor to a target rotating speed until a stop signal is detected.
For example, when the compressor is started, the rotation speed control process is controlled by a main control board in the refrigerator. The target rotating speed is the working rotating speed of the compressor determined by the main control board of the refrigerator according to the ambient temperature or the difference value between the temperature in the refrigerator and the set temperature.
Further, the adjusting the compressor from the oiling rotating speed to a target rotating speed comprises:
and adjusting the oiling rotating speed of the compressor to a target rotating speed at a preset second acceleration.
For example, the second acceleration is designed to enable the rotating speed to be adjusted to the target rotating speed more quickly, the refrigerant is circulated stably, the system pressure is relatively small, and the overshoot effect is not obvious. Large accelerations can bring many benefits, for example: the rapid passing of the resonance band causes certain narrow resonance bands to generate no abnormal noise (namely, the rotating speed of the box body passes through the resonance band without being excited by vibration); even if some wide resonance bands are not easy to cross, the large acceleration can reduce the peak value of the noise and reduce the abnormal time of the noise.
The embodiment of the present invention is explained in a specific application scenario:
referring to fig. 3, fig. 3 is a frequency sweep curve of the inverter compressor from 1700rpm to 3000rpm, and it can be seen from the frequency sweep curve that the inverter compressor has obvious resonance phenomena at 1800 ± 20rpm and 2400 ± 30 rpm. According to the above description, the oiling speed of the inverter compressor can be selected between 2000rpm and 2300rpm, and the buffering speed can be selected to be 1900 rpm.
Referring to fig. 4, the starting moment (0.3ms) of the inverter compressor is increased to 1900rpm, after 5s of maintenance, the speed is increased to 2200rpm (oiling speed) at 180rpm per second, after 120s of maintenance, the speed is controlled by the main control board, at this time, the target speed detected by the main control board is 3900rpm, and the speed of the compressor is increased to 3900rpm at 360rpm per second until the compressor is stopped.
Fig. 5 shows a noise curve of the start-up stage of the inverter compressor, which can be converted into a table form with reference to table 1, wherein the noise is reduced by 2dB and the peak noise is reduced by 8dB compared with the prior control program (other platforms) for 10s, and the "design logic" in the figure is the noise variation of the start-up stage of the compressor under ideal conditions according to the embodiment of the present invention.
TABLE 1 comparison of noise at start-up stage of inverter compressor
| Scheme(s) | First 10s noise mean (dB) | Peak noise (dB) |
| The prototype has | 37.41 | 44.27 |
| Other platforms | 40.03 | 42.61 |
| Designing logic | 35.29 | 36.63 |
FIG. 6 is a graph of noise at a stage when the rotational speed of the inverter compressor is adjusted to the target rotational speed, and the noise is converted into a table form, which can refer to Table 2, and compared with the peak noise of the existing control program, the peak noise is reduced by 2dB, and the speed increasing time is reduced from 20s to 5 s.
TABLE 2 comparison of noise in the boost stage of inverter compressor
| Scheme(s) | Peak noise (dB) |
| Existing procedures of prototype | 42.52 |
| Acceleration adjustment | 41.16 |
| Ramp-up time adjustment | 40.37 |
It can be seen through the example that the instantaneous rotational speed of inverter compressor start-up reduces and to reduce the noise, for guaranteeing that the compressor normally oils, need be adjusted the rotational speed to the rotational speed that oils after the start-up, and inverter compressor rotational speed adjustment design is favorable to inverter compressor to fall the noise after the refrigerant begins to circulate.
Compared with the prior art, the refrigerator disclosed by the embodiment of the invention considers the noise problem caused by the change of the actual rotating speed of the variable frequency compressor and the starting instant of the variable frequency compressor in the angle of noise, and by reducing the influence of overshoot and delay on the starting instant noise of the variable frequency compressor and researching the change of the load of the variable frequency compressor, the rotating speed change time of the variable frequency compressor is designed, the stability of a sound signal is improved, and the running sound of the refrigerator is more comfortable.
Referring to fig. 7, fig. 7 is a flowchart of a compressor starting method according to an embodiment of the present invention, where the compressor starting method includes:
s12, responding to the starting signal sent by the main control panel of the refrigerator, and controlling the compressor to run at a preset buffer rotating speed;
s22, when the compressor runs at the buffer rotating speed for a preset buffer running time, adjusting the rotating speed of the compressor from the buffer rotating speed to a preset oiling rotating speed; the oiling rotating speed is the rotating speed which needs to be reached for ensuring the running lubrication of the compressor during oiling, and the oiling rotating speed is greater than the buffering rotating speed;
and S23, controlling the compressor to run for a preset oiling running time at the oiling rotating speed so as to finish the starting of the compressor.
It should be noted that the compressor starting method according to the embodiment of the present invention is implemented by an inverter in a refrigerator.
Specifically, the buffer running time t1 is less than or equal to the maximum running time of the compressor which is allowed to be ungelled completely; the oiling running time t2 is more than or equal to the time of the refrigerant stable circulation and the time of the compressor being fully oiled.
Illustratively, after the compressor is started, the rotating speed of the compressor is adjusted to be a buffering rotating speed, and transient noise caused by overshoot is reduced through the buffering rotating speed. The smaller the buffer rotation speed, the smaller the overshoot rotation speed, the smaller the corresponding noise, and the easier the rotation speed is stabilized. The buffer rotating speeds can be multiple, and the multi-stage buffer effect is more obvious for the variable frequency compressor with heavier movement (larger rotation inertia) and obvious overshoot.
When the compressor runs at the buffer rotating speed for the buffer running time t1, the rotating speed of the compressor is adjusted to the oiling rotating speed, lubrication is an important factor to be considered in the design of the reciprocating compressor, good lubrication can reduce friction and abrasion, the service life of the compressor is ensured, power consumption is reduced, and the effects of sealing, cooling and noise reduction are achieved. Lubricating oil is conveyed from the bottom of the compressor to the shaft flange, the bearing, the connecting rod, the piston and other parts by means of the oiling channel inside the crankshaft under the action of rotating centrifugal force, and the crankshaft of the compressor must reach certain rotation speed to ensure the lubrication of the compressor. Such as: the oiling rotating speed can be 1800 rpm-2400 rpm.
The oiling operation time t2 is mainly used for ensuring that noise is abnormal due to the change of the rotating speed of the inverter compressor under the action of large system pressure when the refrigerant is not circulated at the initial starting stage of the inverter compressor, and the design of the oiling operation time t2 conforms to the standard that the oiling rotating speed is maintained until after the refrigerant starts to circulate stably (the oiling operation time t2 can be determined according to the occurrence time of the eruption noise of the refrigerant). It is worth noting that t2 must be longer than the time for the compressor to oil completely, and although the time for the refrigerant to start the stabilization cycle is much longer than the time for oil completely, t2 must be longer than the time for oil completely in principle.
Further, adjusting the rotating speed of the compressor from the buffer rotating speed to a preset oiling rotating speed comprises:
and adjusting the rotating speed of the compressor from the buffer rotating speed to a preset oiling rotating speed at a preset first acceleration.
Illustratively, the first acceleration is relatively small, so that the overshoot generated when the frequency conversion compressor is increased from the buffer rotating speed to the oiling rotating speed is smaller. The selection of buffering rotational speed need guarantee that there is not resonance band between buffering rotational speed and the upper oil rotational speed, through resonance band when buffering rotational speed rises to the rotational speed that oils, then can produce the noise unusual, and the time of less first acceleration increase through resonance band simultaneously, unusual noise is perceived more easily. The first acceleration is as small as possible, so that the overcharge generated when the compressor reaches the oiling rotating speed is small, but the time required for the compressor to reach the oiling rotating speed needs to be considered, so that the service life of the compressor is prevented from being influenced, and the acceleration of 100 plus 200rpm per second can be selected.
Further, the frequency converter is further configured to:
when the compressor finishes starting, a starting completion signal is sent to the main control board;
then, the master control board is configured to:
and adjusting the oiling rotating speed of the compressor to a target rotating speed until a stop signal is detected.
For example, when the compressor is started, the rotation speed control process is controlled by a main control board in the refrigerator. The target rotating speed is the working rotating speed of the compressor determined by the main control board of the refrigerator according to the ambient temperature or the difference value between the temperature in the refrigerator and the set temperature.
Further, the adjusting the compressor from the oiling rotating speed to a target rotating speed comprises:
and adjusting the oiling rotating speed of the compressor to a target rotating speed at a preset second acceleration.
For example, the second acceleration is designed to enable the rotating speed to be adjusted to the target rotating speed more quickly, the refrigerant is circulated stably, the system pressure is relatively small, and the overshoot effect is not obvious. Large accelerations can bring many benefits, for example: the rapid passing of the resonance band causes certain narrow resonance bands to generate no abnormal noise (namely, the rotating speed of the box body passes through the resonance band without being excited by vibration); even if some wide resonance bands are not easy to cross, the large acceleration can reduce the peak value of the noise and reduce the abnormal time of the noise.
Compared with the prior art, the compressor starting method disclosed by the embodiment of the invention considers the problem of noise caused by the change of the actual rotating speed of the variable frequency compressor at the starting moment of the variable frequency compressor in the angle of noise, and by reducing the influence of overshoot and delay on the starting moment noise of the variable frequency compressor and researching the change of the load of the variable frequency compressor, the rotating speed change time of the variable frequency compressor is designed, the stability of a sound signal is improved, and the running sound of the refrigerator is more comfortable.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A refrigerator, characterized by comprising:
a cabinet including a plurality of storage compartments;
a door provided at an opening of the storage chamber;
a compressor for providing power to a refrigeration cycle of the refrigerator;
the frequency converter is configured to:
responding to a starting signal sent by a main control board, and controlling the compressor to operate at a preset buffer rotating speed;
when the compressor runs at the buffering rotating speed for a preset buffering running time, the rotating speed of the compressor is adjusted from the buffering rotating speed to a preset oiling rotating speed; the oiling rotating speed is the rotating speed which needs to be reached for ensuring the running lubrication of the compressor during oiling, and the oiling rotating speed is greater than the buffering rotating speed;
and controlling the compressor to run for a preset oiling running time at the oiling rotating speed so as to finish the starting of the compressor.
2. The refrigerator of claim 1, wherein the frequency converter is further configured to:
when the compressor finishes starting, a starting completion signal is sent to the main control board;
then, the master control board is configured to:
and adjusting the oiling rotating speed of the compressor to a target rotating speed until a stop signal is detected.
3. The refrigerator of claim 1, wherein said buffer run time is less than or equal to a maximum allowed run time of said compressor without oiling; the oiling running time is more than or equal to the time of the stable circulation of the refrigerant and the time of the sufficient oiling of the compressor.
4. The refrigerator as claimed in claim 1, wherein said adjusting the rotation speed of the compressor from the buffering rotation speed to a preset oiling rotation speed comprises:
and adjusting the rotating speed of the compressor from the buffer rotating speed to a preset oiling rotating speed at a preset first acceleration.
5. The refrigerator of claim 2, wherein said adjusting said compressor from said oiling speed to a target speed comprises:
and adjusting the oiling rotating speed of the compressor to a target rotating speed at a preset second acceleration.
6. A method of starting a compressor, comprising:
responding to a starting signal sent by a main control panel of the refrigerator, and controlling the compressor to run at a preset buffer rotating speed;
when the compressor runs at the buffering rotating speed for a preset buffering running time, the rotating speed of the compressor is adjusted from the buffering rotating speed to a preset oiling rotating speed; the oiling rotating speed is the rotating speed which needs to be reached for ensuring the running lubrication of the compressor during oiling, and the oiling rotating speed is greater than the buffering rotating speed;
and controlling the compressor to run for a preset oiling running time at the oiling rotating speed so as to finish the starting of the compressor.
7. The compressor starting method as set forth in claim 6, further comprising:
and when the compressor finishes starting, sending a starting completion signal to the main control board so that the main control board adjusts the oiling rotating speed of the compressor to a target rotating speed until a stop signal is detected.
8. A method for starting a compressor as set forth in claim 6, wherein said buffer run time is less than or equal to a maximum allowable ungreased run time of said compressor; the oiling running time is more than or equal to the time of the stable circulation of the refrigerant and the time of the sufficient oiling of the compressor.
9. The method for starting a compressor according to claim 6, wherein said adjusting the speed of said compressor from said buffer speed to a preset oiling speed comprises:
and adjusting the rotating speed of the compressor from the buffer rotating speed to a preset oiling rotating speed at a preset first acceleration.
10. The method for starting a compressor according to claim 7, wherein said adjusting said compressor from said oiling speed to a target speed comprises:
and adjusting the oiling rotating speed of the compressor to a target rotating speed at a preset second acceleration.
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| CN202110633224.6A CN113915830A (en) | 2021-06-07 | 2021-06-07 | Refrigerator and compressor starting method |
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|---|---|---|---|---|
| CN1131266A (en) * | 1994-12-08 | 1996-09-18 | 株式会社东芝 | Refrigerating circulation arrangement |
| KR20000034278A (en) * | 1998-11-28 | 2000-06-15 | 구자홍 | Resonance frequency control apparatus for inverter refrigerator and method thereof |
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