CN115307379B - Control method and control system for solving problem of collision of refrigerator compressor - Google Patents

Control method and control system for solving problem of collision of refrigerator compressor Download PDF

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Publication number
CN115307379B
CN115307379B CN202210951231.5A CN202210951231A CN115307379B CN 115307379 B CN115307379 B CN 115307379B CN 202210951231 A CN202210951231 A CN 202210951231A CN 115307379 B CN115307379 B CN 115307379B
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China
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compressor
refrigerator
pressure
control method
solving
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CN115307379A (en
Inventor
刘岩
邓妮
王慧楠
孙海滨
高中勇
胡滨
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Qingdao Wanbao Compressor Co ltd
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Qingdao Wanbao Compressor Co ltd
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Classifications

    • 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
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/12—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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/01—Timing
    • 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
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • 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
    • F25B2600/027—Compressor control by controlling pressure
    • F25B2600/0271—Compressor control by controlling pressure the discharge pressure
    • 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
    • F25B2600/027—Compressor control by controlling pressure
    • F25B2600/0272—Compressor control by controlling pressure the suction pressure
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1931—Discharge pressures
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1933—Suction pressures
    • 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
    • F25D2600/02—Timing
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The invention discloses a control method and a control system for solving the problem of cylinder collision caused by shutdown of a refrigerator compressor, which relate to the technical field of refrigerator control and solve the problem of cylinder collision caused by shutdown of the existing refrigerator compressor, and the control method and the control system reduce cost and improve universality, and concretely comprise the following steps: when the refrigerator reaches a refrigerating stop point, the compressor and the condensing fan are not disconnected, the evaporating fan is stopped, the compressor continuously operates for a set time, part of refrigerant is stored in the evaporator to reduce the suction side pressure and the discharge side pressure of the compressor, and after the suction side pressure and the discharge side pressure of the compressor are regulated to be within a normal stop pressure range, the compressor is stopped.

Description

Control method and control system for solving problem of collision of refrigerator compressor
Technical Field
The invention relates to the technical field of refrigerator control, in particular to a control method and a control system for solving the problem of cylinder collision of a refrigerator compressor.
Background
At present, a low back pressure compressor is generally selected for use in a cold storage and freezing conversion refrigerator in the market, when the refrigerator body is used in a cold storage state, the compressor can possibly run in medium back pressure, when the low back pressure compressor is used under the working condition of the medium back pressure, the compressor can be stopped unstably due to unstable pressure when stopped, and the phenomenon that the casing is collided during stopping is caused, so that noise is abnormal. Because instantaneous pressure data has certain observation difficulty, the back pressure of the compressor which is already operated in the middle is easily ignored in the product development stage of the refrigerator, and the problem that the product is extremely easy to stop and collide with a cylinder after being marketed is caused.
The inventor finds that in the prior art, two measures are generally adopted for solving the problem of cylinder collision caused by the shutdown of the refrigerator compressor, 1, one scheme is to select to replace the middle back pressure compressor, so that the working condition of the refrigerator body is operated within the bearable range of the compressor, the compression system of the refrigerator is required to be improved in adaptability, the project development period is easy to be prolonged, and the products on the market are required to be repaired and updated in a large batch;
2. in addition, the pressure spring of the compressor is replaced, the problem of cylinder collision caused by stopping is solved by adjusting the K value of the pressure spring, and although the model of the compressor does not need to be changed, the increase of the K value of the pressure spring of the compressor can lead to the increase of the noise of the whole compressor, and meanwhile, if the product is marketed, the product is also subjected to large-batch recall maintenance.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a control method and a control system for solving the problem that when a refrigerator reaches a refrigerating stop point, a compressor and a condensing fan are not disconnected, an evaporating fan is stopped, the compressor continuously operates for a set time, part of refrigerant is stored in an evaporator to reduce the suction side and the exhaust side pressure of the compressor, so that the compressor is stopped after the working condition of the system is regulated to be within a normal stop pressure range, and the problem that the compressor of the existing refrigerator is stopped to hit the cylinder is solved.
In order to achieve the above object, the present invention is realized by the following technical scheme:
in a first aspect, the present invention provides a control method for solving a problem of cylinder collision of a refrigerator compressor, comprising: when the refrigerator reaches a refrigerating stop point, the compressor and the condensing fan are not disconnected, the evaporating fan is stopped, the compressor continuously operates for a set time, part of refrigerant is stored in the evaporator to reduce the suction side pressure and the discharge side pressure of the compressor, and after the suction side pressure and the discharge side pressure of the compressor are regulated to be within a normal stop pressure range, the compressor is stopped.
As a further implementation manner, the compressor and the condensing fan are stopped synchronously.
As a further implementation manner, the method for determining the continuous operation setting time of the compressor includes:
setting the temperature of the refrigerator at the highest temperature of the refrigerator and electrifying to operate, controlling the evaporation fan to stop operating when the temperature in the refrigerator reaches a stop point, continuing normal operation of the compressor and the condensation fan and starting timing, stopping the compressor and the condensation fan after operating for a plurality of minutes, and recording the suction pressure, the exhaust pressure, the operating time and the corresponding stop cylinder collision condition of the compressor when stopping;
repeating the test and recording, and taking the running time corresponding to the suction pressure and the exhaust pressure when the cylinder collision does not occur as the continuous running set time of the compressor and verifying.
As a further implementation, the recorded suction pressure, discharge pressure and corresponding cylinder collision conditions are collected and plotted.
As a further implementation manner, the verification method for the continuous operation set time of the compressor comprises the following steps: the gear of the refrigerator is adjusted to the lowest gear of refrigeration, a water box is placed on each layer of shelf of the refrigerator, the water box is taken out after the refrigerator operates stably for 24 hours, the icing condition of the water box is observed, and when the water box does not freeze, the compressor continuously operates for a set time to be qualified.
As a further implementation manner, when icing occurs in the water box, checking is failed, the corresponding suction pressure and the corresponding exhaust pressure under the condition that the cylinder is not knocked are reselected, and the corresponding running time is inquired according to the reselected suction pressure and exhaust pressure, and the checking is repeated until the checking is failed.
As a further implementation, during the verification process, the refrigerator is operated at a ring temperature of 9.5-10.5 ℃.
In a second aspect, the invention provides a control system for solving the problem of cylinder collision of a refrigerator compressor, which comprises a compressor, a condenser, a capillary tube and an evaporator which are sequentially connected through pipelines, wherein the condenser is connected with the exhaust side of the compressor, the evaporator is connected with the suction side of the compressor, and both the suction side and the exhaust side of the compressor are provided with a pressure sensor.
As a further implementation, a filter is provided between the capillary tube and the condenser.
As a further implementation mode, an evaporation fan is fixedly arranged in the shell of the evaporator, and a condensing fan is fixedly arranged outside the condenser.
The beneficial effects of the invention are as follows:
(1) When the refrigerator reaches a refrigerating stop point, the compressor and the condensing fan are not disconnected, the evaporating fan is stopped, the compressor continuously operates for a set time, part of refrigerant is stored in the evaporator to reduce the suction side and the exhaust side pressure of the compressor, so that the compressor is stopped after the working condition of the system is adjusted to be within a normal stop pressure range, the problem that the compressor is stopped and a cylinder is collided is effectively solved, the replacement of a compressor model/pressure spring is not needed, the cost is low, the improvement effect is obvious, other functions of a refrigerating system of the refrigerator are not influenced, the refrigerator refrigerating system is applicable to different types of refrigerating systems, and the universality is strong.
(2) The invention selects and verifies the set time for continuous operation of the compressor, ensures the refrigerating effect while avoiding the collision of the compressor with the cylinder during the stop, and effectively avoids the problem of freezing in the refrigerating chamber of the refrigerator.
(3) The invention gathers the collected air suction pressure, air discharge pressure and cylinder collision condition and draws the chart, so that the test personnel can obtain the corresponding air suction pressure and air discharge pressure data under the condition that the cylinder collision is avoided according to the chart, and the test efficiency is greatly improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic view of a control system of a refrigerator according to one or more embodiments of the present invention;
FIG. 2 is a schematic illustration of the scatter of suction and discharge pressure shut-down cylinder bump conditions in accordance with one or more embodiments of the present invention;
in the figure: the mutual spacing or size is exaggerated for showing the positions of all parts, and the schematic drawings are used only for illustration;
1, a compressor; 2. an evaporator; 3. a capillary tube; 4. a condenser; 5. an evaporation fan; 6. a condensing fan; 7. a suction pressure sensor; 8. an exhaust pressure sensor.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As described in the background art, in order to solve the problem that the refrigerator compressor is stopped and collides with the cylinder, the back pressure compressor in the replacement process or the pressure spring of the compressor is generally adopted in the prior art, but the problem of large-batch recall maintenance exists, and in order to solve the technical problem, the invention provides a control method and a control system for solving the problem that the refrigerator compressor collides with the cylinder.
Example 1
In an exemplary embodiment of the present invention, a control method for solving a cylinder collision of a compressor of a refrigerator is provided.
In order to solve the problem of cylinder collision during compressor shutdown, the shutdown problem during super-working conditions is required to be solved, and the basic solution is to stop the compressor 1 after the working conditions of the system are adjusted to be within the normal shutdown pressure range, so that the cylinder collision during the shutdown of the compressor 1 is avoided by not disconnecting the compressor 1 and the condensing fan 6, stopping the evaporating fan 5, continuously running the compressor 1 for a set time and storing part of refrigerant in the evaporator 2.
It will be appreciated that when the condensing fan 6 is not provided, it is only necessary to ensure that the compressor 1 is not turned off when the refrigerator reaches the refrigerating stop point.
The method for determining the continuous operation setting time of the compressor 1 comprises the following steps:
the temperature of the refrigerator is set at the highest temperature of the refrigerator, an air suction pressure sensor 7 is arranged on the air suction side of the compressor 1, an air discharge pressure sensor 8 is arranged on the air discharge side of the compressor 1, and then the refrigerator is electrified, so that the compressor 1 operates normally, and the evaporation fan 5 and the condensation fan 6 operate at rated rotation speeds.
It will be appreciated that the maximum temperature of the refrigerator is determined according to the actual refrigerator model, and is not limited thereto.
At this time, the refrigerant flows from the compressor 1 through the condenser 4, the capillary tube 3, and the evaporator 2 back to the compressor 1, the temperature in the tank decreases, and when the temperature in the tank reaches a stop point (i.e., a refrigeration stop point), the evaporation fan 5 is controlled to stop operating, and the compressor 1 and the condensation fan 6 (if provided) continue to operate normally.
When the evaporation fan 5 stops running, the compressor 1 and the condensation fan 6 (if any) continue to run normally, the time is synchronously counted, after a few minutes of running, the compressor 1 and the condensation fan 6 (if any) are stopped, and the problems of poor cylinder collision caused by the suction pressure P1, the discharge pressure P2, the running time T and the stopping of the compressor are recorded.
The temperature of the refrigerator body is reset at the highest temperature of the refrigerator, the testing process is repeated, and the suction pressure P1, the discharge pressure P2 and the running time T of the compressor during the shutdown in the testing are recorded, and whether the problem of poor cylinder collision occurs during the shutdown is solved.
Repeating the test and recording for several times, collecting the collected suction pressure P1, the collected exhaust pressure P2 and the cylinder collision situation, and drawing a chart (shown in fig. 2), so that a tester can conveniently and quickly obtain data of the suction pressure P1 and the exhaust pressure P2 when the cylinder collision problem does not occur according to the chart, and inquiring the recorded corresponding running time T according to the obtained data of the suction pressure P1 and the exhaust pressure P2, thereby obtaining the required continuous running time T1 when the cylinder collision phenomenon of the compressor does not occur.
The logic of the final refrigerator running in the refrigerating state is as follows: the refrigerator is electrified, the compressor 1 runs normally, the condensing fan 6 and the evaporating fan 5 run at rated rotation speed, the temperature in the refrigerator is reduced, when the temperature in the refrigerator reaches a stop point, the evaporating fan 5 is controlled to stop running, and the compressor and the condensing fan 6 (if any) continue to run for T1 min and then stop, so that the problem that the compressor 1 stops and collides with a cylinder is effectively solved.
Since the compressor 1 still operates for T1 minutes when the temperature in the box reaches the stop point in the above operation logic, the phenomenon of freezing in the box may occur when the refrigerating gear is set, and therefore, the control program needs to be further verified, and the specific method is as follows:
the refrigerator is placed at the ring temperature of 9.5-10.5 ℃ for running, the gear is adjusted to 2 ℃ or the lowest gear of refrigeration, a water box (about 90 x 60mm,250ml water) filled with clean water is placed on each layer of shelf of the refrigerator, and after the refrigerator is stably run for 24 hours, the water box is taken out and the icing condition of the water box is observed.
When no icing phenomenon occurs in the water box, the running time T1 passes verification;
when the icing phenomenon occurs in the water box, the operation time T1 is unqualified, and the suction pressure and the exhaust pressure corresponding to the condition of not knocking the cylinder are selected from the scatter chart of the suction pressure and the exhaust pressure shut down cylinder knocking conditions.
And inquiring the recorded running time T according to the data of the re-selected suction pressure and the re-selected discharge pressure to obtain the required continuous running time T2 when the compressor does not have the cylinder collision phenomenon.
After the continuous operation time T2 is determined, the refrigerator is placed at the ring temperature of 9.5-10.5 ℃ again for operation, the gear is adjusted to be 2 ℃ or the lowest gear for refrigeration, the freezing condition of the water box is checked after the operation is carried out for 20 hours, and the water box is qualified when no freezing occurs; and repeating the selection process and the verification process of the continuous operation time when the icing occurs until the water box is free from the icing phenomenon, and finally determining the proper continuous operation time of the compressor 1.
When the refrigerator reaches a refrigerating stop point, the compressor 1 and the condensing fan 6 are not disconnected, the evaporating fan 5 is stopped, the compressor 1 continuously works for a set time, part of refrigerant is stored in the evaporator 2, so that the suction side and the exhaust side pressure of the compressor are reduced, the working condition of the system is adjusted to be in a normal stop pressure range, the compressor 1 is stopped, the problem that the compressor 1 is stopped to collide with a cylinder is effectively solved, the replacement of a model/a pressure spring of the compressor 1 is not needed, the cost is low, the improvement effect is obvious, other functions of a refrigerating system of the refrigerator are not influenced, the refrigerator refrigerating system is applicable to different types of refrigerating systems, and the universality is strong.
Example 2
In another exemplary embodiment of the present invention, as shown in fig. 1, a control system is proposed, which uses the control method described in example 1, including a compressor 1, an evaporator 2, a capillary tube 3, a condenser 4, an evaporation fan 5, a condensation fan 6, a suction pressure sensor 7, and an exhaust pressure sensor 8.
The compressor 1 is connected with the condenser 4, the capillary tube 3 and the evaporator 2 in sequence through pipelines, wherein the condenser 4 is connected with the exhaust side of the compressor 1, the evaporator 2 is connected with the suction side of the compressor 1, the evaporation fan 5 is fixedly arranged in the shell of the evaporator 2 and is mainly used for supplying air to the fin part of the evaporator 2, and the condensation fan 6 is fixedly arranged outside the condenser 4 and is used for supplying air to the condenser 4 to take away the temperature on the condenser 4.
The suction pressure sensor 7 is fixedly arranged on a suction side pipeline of the compressor 1, and the exhaust pressure sensor 8 is fixedly arranged on a discharge side pipeline of the compressor 1 so as to respectively monitor the pressure of the suction side and the discharge side of the compressor 1 in real time.
A filter (not shown) may also be provided between the capillary tube 3 and the condenser 4 to filter out impurities from the system.
It will be appreciated that whether the condensing fan 6 is provided may be determined according to actual design requirements, and in particular, is not limited thereto.
The specific working principle is as follows:
the high-temperature and high-pressure gas is discharged from the compressor 1, condensed and radiated by the condenser 4 to form low-temperature and high-pressure liquid, impurities in the system are filtered by the filter, the low-temperature and low-pressure liquid is reduced in pressure by the flow limiting of the capillary tube 3, the low-temperature and low-pressure liquid is evaporated in the evaporator 5 (heat in the refrigerator is taken away by heat absorption) to form low-temperature and low-pressure gas, and then the low-temperature and low-pressure gas is compressed by the compressor 1 to form circulation.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The control method for solving the problem of cylinder collision of the refrigerator compressor is characterized by comprising the following steps of: when the refrigerator reaches a refrigerating stop point, the compressor and the condensing fan are not disconnected, the evaporating fan is stopped, the compressor continuously operates for a set time, part of refrigerant is stored in the evaporator to reduce the suction side pressure and the discharge side pressure of the compressor, and after the suction side pressure and the discharge side pressure of the compressor are regulated to be within a normal stop pressure range, the compressor is stopped;
the method for determining the continuous operation setting time of the compressor comprises the following steps:
setting the temperature of the refrigerator at the highest temperature of the refrigerator and electrifying to operate, controlling the evaporation fan to stop operating when the temperature in the refrigerator reaches a stop point, continuing normal operation of the compressor and the condensation fan and starting timing, stopping the compressor and the condensation fan after operating for a plurality of minutes, and recording the suction pressure, the exhaust pressure, the operating time and the corresponding stop cylinder collision condition of the compressor when stopping;
repeating the test and recording, and taking the running time corresponding to the suction pressure and the exhaust pressure when the cylinder collision does not occur as the continuous running set time of the compressor and verifying;
the verification method for the continuous operation set time of the compressor comprises the following steps: the gear of the refrigerator is adjusted to the lowest gear of refrigeration, a water box is placed on each layer of shelf of the refrigerator, the water box is taken out after the refrigerator operates stably for 24 hours, the icing condition of the water box is observed, and when the water box does not freeze, the compressor continuously operates for a set time to be qualified.
2. The control method for solving the problem of cylinder collision of the refrigerator compressor according to claim 1, wherein the compressor and the condensing fan are stopped synchronously.
3. The control method for solving the problem of cylinder collision of the compressor of the refrigerator according to claim 1, wherein the collected and recorded suction pressure, exhaust pressure and corresponding cylinder collision conditions are summarized and plotted.
4. The control method for solving the problem of cylinder collision of a refrigerator compressor according to claim 1, wherein when icing occurs in the water box, verification is failed, the corresponding suction pressure and the corresponding discharge pressure under the condition of no cylinder collision are reselected, and the corresponding operation time is inquired according to the reselected suction pressure and discharge pressure, and the verification is repeated until the verification is passed.
5. The control method for solving the problem of collision of a refrigerator compressor according to claim 1, wherein the refrigerator is placed to operate at a ring temperature of 9.5-10.5 ℃ during verification.
6. A control system for solving the problem of cylinder collision of a refrigerator compressor by adopting the control method of any one of claims 1-5, which is characterized by comprising a compressor, a condenser, a capillary tube and an evaporator which are sequentially connected through pipelines, wherein the condenser is connected with the exhaust side of the compressor, the evaporator is connected with the suction side of the compressor, and the suction side and the exhaust side of the compressor are both provided with a pressure sensor.
7. The control system for solving the problem of refrigerator compressor cylinder collision control method according to claim 6, wherein a filter is arranged between the capillary tube and the condenser.
8. The control system for solving the problem of refrigerator compressor cylinder collision control method according to claim 6, wherein an evaporation fan is fixedly arranged in a shell of the evaporator, and a condensing fan is fixedly arranged outside the condenser.
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