CN113915893A - Refrigerator and control method thereof - Google Patents

Refrigerator and control method thereof Download PDF

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Publication number
CN113915893A
CN113915893A CN202110514400.4A CN202110514400A CN113915893A CN 113915893 A CN113915893 A CN 113915893A CN 202110514400 A CN202110514400 A CN 202110514400A CN 113915893 A CN113915893 A CN 113915893A
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China
Prior art keywords
temperature
evaporators
electromagnetic valve
target
set time
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Granted
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CN202110514400.4A
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Chinese (zh)
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CN113915893B (en
Inventor
郭思志
徐文涛
卢玉波
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Hisense Shandong Refrigerator Co Ltd
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Hisense Shandong Refrigerator Co Ltd
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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
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
    • 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
    • F25D29/003—Arrangement or mounting of control or safety devices for movable 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/008—Alarm 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
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The invention relates to a refrigerator and a control method thereof, wherein the method comprises the following steps: acquiring the internal temperatures of the three chambers and the inlet temperatures of the three evaporators in real time; judging whether each compartment needs to be refrigerated or not according to the internal temperatures of the three compartments and the corresponding starting temperatures; when the target chambers needing to be refrigerated exist, the compressor is controlled to be started, and the electromagnetic valve is controlled to switch the flow direction of the refrigerant to flow to the evaporator corresponding to each target chamber; and judging whether the drop values of the inlet temperatures of the evaporators of the target compartments in the first set time reach corresponding first temperature drop threshold values or not, and judging whether the drop values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated in the first set time are not greater than the corresponding first temperature drop threshold values or not, if so, judging that the electromagnetic valve does not break down, otherwise, carrying out fault processing on the electromagnetic valve. The invention can detect and process the fault of the running state of the electromagnetic valve.

Description

Refrigerator and control method thereof
Technical Field
The invention relates to the technical field of refrigerators, in particular to a refrigerator and a control method thereof.
Background
In the existing multi-cycle refrigerating system refrigerator, two or more evaporators are used to refrigerate different chambers, and in order to refrigerate different chambers, the flow direction of the refrigerant needs to be controlled by an electromagnetic valve. However, in the solenoid valve switching process of the multi-cycle refrigeration system refrigerator, the solenoid valve is prone to failure, so that system refrigeration is abnormal and even a compressor is damaged, but at present, no method is available for well performing failure detection and processing on the running state of the solenoid valve in the solenoid valve switching process of the multi-cycle refrigeration system refrigerator.
Disclosure of Invention
The embodiment of the invention provides a refrigerator and a control method thereof, which can effectively detect and process the fault of the running state of an electromagnetic valve in the electromagnetic valve switching process of the refrigerator with a multi-cycle refrigeration system, so that the refrigeration system can run normally better, the service life of a compressor is prolonged, and the fault rate of the refrigerator is reduced.
An embodiment of the present invention provides a refrigerator including:
the refrigerator comprises a box body, a cabinet body and a control device, wherein three chambers are arranged in the box body, and temperature collectors are arranged in the three chambers;
the refrigeration system comprises a compressor, a condenser, an electromagnetic valve and three evaporators; the outlet of the compressor is connected with the inlet of the electromagnetic valve through the condenser, the three outlets of the electromagnetic valve are respectively connected with the inlet of the compressor through the three evaporators, the three evaporators are respectively arranged in the three compartments, and the inlets of the three evaporators are respectively provided with a temperature collector;
a controller connected to the compressor, the solenoid valve, and all of the temperature collectors, configured to:
acquiring the internal temperatures of the three chambers and the inlet temperatures of the three evaporators in real time;
judging whether each compartment needs to be refrigerated or not according to the internal temperatures of the three compartments and the corresponding starting temperatures;
when the target chambers needing to be refrigerated exist, controlling the compressor to start, and controlling the electromagnetic valve to switch the flow direction of the refrigerant to flow to the evaporator corresponding to each target chamber;
and judging whether the drop values of the inlet temperatures of the evaporators of the target compartments in a first set time reach corresponding first temperature drop threshold values or not, and whether the drop values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated in the first set time are not more than the corresponding first temperature drop threshold values or not, if so, judging that the electromagnetic valve does not break down, otherwise, carrying out fault processing on the electromagnetic valve.
As an improvement of the above scheme, the refrigerator further comprises a fault alarm device;
the fault treatment of the electromagnetic valve specifically comprises:
resetting the electromagnetic valves, and after the resetting, re-judging whether the falling values of the inlet temperatures of the evaporators of the target compartments within a first set time reach corresponding first temperature falling threshold values, and whether the falling values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated within the first set time are not more than the corresponding first temperature falling threshold values, if so, judging that the electromagnetic valves are not in failure, otherwise, judging whether the falling values of the inlet temperatures of the three evaporators within the first set time reach corresponding second temperature falling threshold values;
when the fault levels of the electromagnetic valves are determined to be first-level faults when the corresponding second temperature drop thresholds are all determined to be reached, and the fault alarm device is controlled to send out first-level fault alarms;
and when the failure levels of the electromagnetic valves are determined not to reach the corresponding second temperature drop threshold values, determining that the failure levels of the electromagnetic valves are secondary failures, and controlling the failure alarm device to send out secondary failure alarms.
As an improvement of the above solution, the second temperature drop threshold corresponding to the evaporator of each target compartment is one half of the drop value of the internal temperature of the target compartment within the first set time;
the second temperature drop threshold corresponding to the evaporator of each non-target compartment which does not need to be cooled is one third of the drop value of the internal temperature of the non-target compartment in the first set time.
As an improvement of the above, after the controlling the failure warning device to issue the primary failure warning, the controller is further configured to:
and controlling the compressor to stop.
As an improvement of the above, after the controlling the failure warning device to issue the secondary failure warning, the controller is further configured to:
and resetting the electromagnetic valve after a second set time.
As an improvement of the above solution, a first temperature drop threshold corresponding to the evaporator of each target compartment is a drop value of the internal temperature of the target compartment within the first set time;
the evaporator of each non-target compartment that does not require refrigeration corresponds to a temperature drop threshold of 0.
As an improvement of the above, a start time of the first set time is a time when the solenoid valve starts to switch the flow direction, and an end time of the first set time is a time after the solenoid valve starts to switch the flow direction for 30 seconds.
As an improvement of the scheme, an outlet of the electromagnetic valve is connected with the evaporator through an evaporation tube, the temperature collector is installed on the evaporation tube through a clamping seat, and the distance between the temperature collector and the evaporator is 3 cm.
Another embodiment of the invention provides a control method of a refrigerator, the refrigerator comprises a refrigerator body and a refrigeration system, three chambers are arranged in the refrigerator body, temperature collectors are arranged in the three chambers, the refrigeration system comprises a compressor, a condenser, an electromagnetic valve and three evaporators, an outlet of the compressor is connected with an inlet of the electromagnetic valve through the condenser, three outlets of the electromagnetic valve are connected with inlets of the compressor through the three evaporators respectively, the three evaporators are arranged in the three chambers respectively, and the inlets of the three evaporators are provided with the temperature collectors; the method comprises the following steps:
acquiring the internal temperatures of the three chambers and the inlet temperatures of the three evaporators in real time;
judging whether each compartment needs to be refrigerated or not according to the internal temperatures of the three compartments and the corresponding starting temperatures;
when the target chambers needing to be refrigerated exist, controlling the compressor to start, and controlling the electromagnetic valve to switch the flow direction of the refrigerant to flow to the evaporator corresponding to each target chamber;
and judging whether the drop values of the inlet temperatures of the evaporators of the target compartments in a first set time reach corresponding first temperature drop threshold values or not, and whether the drop values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated in the first set time are not more than the corresponding first temperature drop threshold values or not, if so, judging that the electromagnetic valve does not break down, otherwise, carrying out fault processing on the electromagnetic valve.
As an improvement of the above scheme, the refrigerator further comprises a fault alarm device;
the fault treatment of the electromagnetic valve specifically comprises:
resetting the electromagnetic valves, and after the resetting, re-judging whether the falling values of the inlet temperatures of the evaporators of the target compartments within a first set time reach corresponding first temperature falling threshold values, and whether the falling values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated within the first set time are not more than the corresponding first temperature falling threshold values, if so, judging that the electromagnetic valves are not in failure, otherwise, judging whether the falling values of the inlet temperatures of the three evaporators within the first set time reach corresponding second temperature falling threshold values;
when the fault levels of the electromagnetic valves are determined to be first-level faults when the corresponding second temperature drop thresholds are all determined to be reached, and the fault alarm device is controlled to send out first-level fault alarms;
and when the failure levels of the electromagnetic valves are determined not to reach the corresponding second temperature drop threshold values, determining that the failure levels of the electromagnetic valves are secondary failures, and controlling the failure alarm device to send out secondary failure alarms.
Compared with the prior art, the refrigerator and the control method thereof provided by the embodiment have the following beneficial effects:
the method comprises the steps of obtaining the internal temperature of three chambers in a refrigerator and the inlet temperature of evaporators corresponding to the three chambers in real time, judging whether each chamber needs to be refrigerated according to the internal temperature of the three chambers and the corresponding starting temperature, controlling the compressor to start when a target chamber needing to be refrigerated is determined to exist, controlling the electromagnetic valve to switch the flow direction of a refrigerant to flow to the evaporator corresponding to each target chamber, judging whether the falling value of the inlet temperature of the evaporator of each target chamber in a first set time reaches a corresponding first temperature falling threshold value, judging whether the falling value of the inlet temperature of the evaporator of each non-target chamber needing not to be refrigerated in the first set time is not larger than the corresponding first temperature falling threshold value, and judging that the electromagnetic valve does not break down if the falling values of the inlet temperature of the evaporator of each non-target chamber needing not to be refrigerated in the first set time are both larger than the corresponding first temperature falling threshold value, otherwise, the electromagnetic valve is subjected to fault processing, so that the trend of the refrigerant can be monitored according to the temperature change of inlets of the evaporators in the electromagnetic valve switching process of the multi-cycle refrigeration system refrigerator, the fault detection and processing can be effectively carried out on the running state of the electromagnetic valve, the refrigeration system can run normally better, the service life of the compressor is prolonged, and the fault rate of the refrigerator is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an operation of a controller in a refrigerator according to an embodiment of the present invention;
fig. 3 is a schematic view of an installation position of a temperature collector according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a control method of a refrigerator 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.
Referring to fig. 1 and fig. 2, a schematic structural diagram of a refrigerator according to an embodiment of the present invention and a flowchart illustrating operation of a controller in the refrigerator according to an embodiment of the present invention are respectively shown.
An embodiment of the present invention provides a refrigerator 1, including:
the refrigerator comprises a box body, a cabinet body and a control device, wherein three chambers are arranged in the box body, and temperature collectors are arranged in the three chambers;
the refrigeration system comprises a compressor 11, a condenser 12, an electromagnetic valve 13 and three evaporators; the outlet of the compressor 11 is connected with the inlet of the electromagnetic valve 13 through the condenser 12, the three outlets of the electromagnetic valve 13 are respectively connected with the inlet of the compressor 11 through the three evaporators, the three evaporators are respectively arranged in the three compartments to provide cold energy for the three compartments, and the inlets of the three evaporators are respectively provided with a temperature collector;
a controller 17 connected to the compressor 11, the solenoid valve 13 and all the temperature collectors, and configured to:
s11, acquiring the internal temperatures of the three chambers and the inlet temperatures of the three evaporators in real time;
s12, judging whether each compartment needs to be refrigerated or not according to the internal temperatures of the three compartments and the corresponding starting temperatures;
s13, when it is determined that there is a target compartment requiring cooling, controlling the compressor 11 to start, and controlling the electromagnetic valve 13 to switch the flow direction of the refrigerant to the evaporator corresponding to each target compartment;
s14, determining whether the drop values of the inlet temperatures of the evaporators of the target compartments within a first set time all reach the corresponding first temperature drop threshold, and whether the drop values of the inlet temperatures of the evaporators of the non-target compartments that do not require cooling within the first set time are not greater than the corresponding first temperature drop threshold, if both of them are true, determining that the electromagnetic valve 13 is not in fault, otherwise, performing fault processing on the electromagnetic valve 13.
It can be understood that all the temperature collectors collect the temperatures of the positions of the three temperature collectors in real time and output the temperatures to the controller 17, so that the controller 17 can obtain the internal temperatures of the three compartments and the inlet temperatures of the three evaporators in real time, and in step S14, the controller 17 can obtain the drop values of the inlet temperatures of the three evaporators within a first set time according to the temperatures collected by the temperature collectors at the inlets of the three evaporators.
For example, the three compartments are a refrigerating compartment, a freezing compartment and a temperature-changing compartment, and as shown in fig. 1, the evaporators disposed in the three compartments are a refrigerating evaporator 14, a freezing evaporator 15 and a temperature-changing evaporator 16.
It should be noted that each compartment may correspond to a different starting temperature, and in step S12, when the internal temperature of one of the compartments reaches the starting temperature corresponding to the compartment, it may be determined that the compartment needs to be cooled.
It is to be understood that, in step S14, if there is no non-target compartment that does not require cooling, it may be determined that the drop value of the inlet temperature of the evaporator of each non-target compartment that does not require cooling within the first set time is not greater than the corresponding first temperature drop threshold, and at this time, if it is determined that the drop value of the inlet temperature of the evaporator of each target compartment within the first set time reaches the corresponding first temperature drop threshold, it may be determined that the solenoid valve 13 is not failed, otherwise, failure processing is performed on the solenoid valve 13.
It should be noted that the controller 17 is further configured to:
judging whether each target compartment needs to stop refrigeration or not according to the internal temperature of each target compartment and the corresponding shutdown temperature;
and controlling the compressor 11 to stop starting when the target compartment needing to stop cooling is determined.
In this embodiment, the internal temperatures of three compartments in the refrigerator and the inlet temperatures of evaporators corresponding to the three compartments are obtained in real time, and then according to the internal temperatures of the three compartments and the corresponding starting temperatures, whether each compartment needs to be refrigerated is determined, when it is determined that a target compartment needing to be refrigerated exists, the compressor 11 is controlled to start, the electromagnetic valve 13 is controlled to switch the flow direction of the refrigerant to flow to the evaporator corresponding to each target compartment, and then whether the falling values of the inlet temperatures of the evaporators of the target compartments within a first set time reach corresponding first temperature falling threshold values, and whether the falling values of the inlet temperatures of the evaporators of the non-target compartments within the first set time are not greater than the corresponding first temperature falling threshold values, if both are yes, and if not, performing fault processing on the electromagnetic valve 13, so that the trend of the refrigerant can be monitored according to the temperature change at the inlet of each evaporator in the switching process of the electromagnetic valve 13 of the multi-cycle refrigeration system refrigerator, and the running state of the electromagnetic valve 13 is effectively subjected to fault detection and processing, so that the refrigeration system can run normally better, the service life of the compressor 11 is prolonged, and the fault rate of the refrigerator is reduced.
As one of the optional embodiments, the refrigerator further comprises a malfunction alerting device;
the fault processing of the electromagnetic valve 13 specifically includes:
resetting the electromagnetic valve 13, and after the resetting, re-judging whether the drop values of the inlet temperatures of the evaporators of the target compartments within a first set time reach corresponding first temperature drop thresholds, and whether the drop values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated within the first set time are not greater than the corresponding first temperature drop thresholds, if so, judging that the electromagnetic valve 13 is not in failure, otherwise, judging whether the drop values of the inlet temperatures of the three evaporators within the first set time reach corresponding second temperature drop thresholds;
when the fault levels of the electromagnetic valves 13 are determined to be first-level faults when the corresponding second temperature drop thresholds are all determined to be reached, and the fault alarm device is controlled to send out first-level fault alarms;
and when the failure levels of the electromagnetic valves 13 are determined to be the second-level failure, controlling the failure alarm device to send out a second-level failure alarm.
In this embodiment, the failure of the electromagnetic valve 13 is eliminated by performing the reset processing on the electromagnetic valve 13, and after the reset processing, the state of the electromagnetic valve 13 is detected again, and when the electromagnetic valve 13 is still failed, the failure classification is performed on the operating state of the electromagnetic valve 13, and a classification alarm is performed to remind a user to process the failure in time.
Further, the second temperature drop threshold corresponding to the evaporator of each target compartment is one half of the drop value of the internal temperature of the target compartment within the first set time;
the second temperature drop threshold corresponding to the evaporator of each non-target compartment which does not need to be cooled is one third of the drop value of the internal temperature of the non-target compartment in the first set time.
It should be noted that, by comparing the temperature difference before and after the flow direction switching of the electromagnetic valve 13 at the inlet of the evaporator of each compartment with the temperature difference before and after the flow direction switching of the electromagnetic valve 13 in the compartment, the operation state of the electromagnetic valve 13 can be effectively determined, specifically, when the drop values of the inlet temperatures of the three evaporators within the first set time all reach the corresponding second temperature drop threshold value, it is indicated that the electromagnetic valve 13 is blocked, at this time, a primary fault alarm is started, and when the drop values of the inlet temperatures of the three evaporators within the first set time do not all reach the corresponding second temperature drop threshold value, it is indicated that the electromagnetic valve 13 leaks, at this time, a secondary fault alarm is started.
Further, the controller 17, after controlling the fault warning device to issue a primary fault alarm, is further configured to:
controlling the compressor 11 to stop.
In this embodiment, if it is determined that the electromagnetic valve 13 has a primary failure, which indicates that the electromagnetic valve 13 is blocked, the compressor 11 needs to be immediately controlled to stop, so as to avoid the damage to the compressor 11.
Further, the controller 17, after controlling the fault warning device to issue a secondary fault alarm, is further configured to:
the solenoid valve 13 is reset again after a second set time.
In this embodiment, if it is determined that the solenoid valve 13 has a two-stage fault, it is described that the solenoid valve 13 has a leakage, and at this time, the solenoid valve 13 may be reset again after reaching the second set time according to the start/stop point control when the solenoid valve 13 is abnormal, so as to restore the solenoid valve 13 to the normal state.
As an alternative embodiment, the first temperature drop threshold corresponding to the evaporator of each target compartment is a drop value of the internal temperature of the target compartment within the first set time;
the evaporator of each non-target compartment that does not require refrigeration corresponds to a temperature drop threshold of 0.
It should be noted that, by comparing the temperature difference before and after the flow direction switching of the electromagnetic valve 13 at the inlet of the evaporator of the target compartment with the temperature difference before and after the flow direction switching of the electromagnetic valve 13 inside the target compartment, and determining whether the temperature difference before and after the flow direction switching of the electromagnetic valve 13 at the inlet of the evaporator of the non-target compartment does not exceed 0, it is possible to accurately determine whether the operation state of the electromagnetic valve 13 is normal.
As an alternative embodiment, the starting time of the first set time is the time when the solenoid valve 13 starts to switch the flow direction, and the ending time of the first set time is the time after the solenoid valve 13 starts to switch the flow direction for 30 s.
In this embodiment, by setting the start time of the first set time as the time when the solenoid valve 13 starts to switch the flow direction and the end time of the first set time as the time after the solenoid valve 13 starts to switch the flow direction for 30 seconds, it is possible to ensure that the failure determination is performed after the operation of the solenoid valve 13 is stable, thereby improving the accuracy of the failure determination.
As an alternative embodiment, referring to fig. 3, an outlet of the electromagnetic valve 13 is connected to the evaporator through an evaporation tube, the temperature collector is mounted on the evaporation tube through a clamping seat, and a distance between the temperature collector and the evaporator is 3 cm.
In this embodiment, the temperature collector passes through the cassette to be fixed on the evaporating pipe, and 3cm apart from the evaporimeter can influence the temperature collector when avoiding the evaporimeter frosting, the detection temperature that again can be sensitive.
For example, in a specific embodiment, when the evaporators disposed in the three compartments are the refrigerating evaporator 14, the freezing evaporator 15 and the variable-temperature evaporator 16, the first temperature drop threshold corresponding to the three evaporators may be obtained by dynamically calculating the set shutdown temperature for refrigerating, freezing and variable-temperature of the refrigerator and the actual internal temperature of each compartment before the flow direction is switched by the electromagnetic valve 13, where the first temperature drop threshold t1x corresponding to the refrigerating evaporator 14 is equal to the refrigerating actual temperature-refrigerating shutdown temperature, the first temperature drop threshold t2x corresponding to the freezing evaporator 15 is equal to the freezing actual temperature-freezing shutdown temperature, and the first temperature drop threshold t3x corresponding to the variable-temperature evaporator 16 is equal to the variable-actual temperature-variable-temperature shutdown temperature. More preferably, the first temperature drop threshold corresponding to three evaporators can be set according to actual requirements, but not more than 3. When the compressor 11 is closed and the electromagnetic valve 13 is closed, the inlet temperature T1 of the refrigerating evaporator 14, the inlet temperature T2 of the freezing evaporator 15 and the inlet temperature T3 of the variable temperature evaporator 16 continuously rise, and the failure determination method of the electromagnetic valve 13 is as follows for each case:
(1) when the compressor 11 is started and the electromagnetic valve 13 is cooled, the electromagnetic valve 13 is set to be T1-T10 before being cooled, T2-T20 and T3-T30, after the electromagnetic valve 13 is switched for 30s, T1-T11, T2-T21 and T3-T31, if T10> -T11 + T1x, T20< -T21 and T30< -T31, the condition is met, the electromagnetic valve 13 is normally switched, and if the condition is not met, the valve is processed abnormally; if t10< ═ t11+ t1x/2, t20< ═ t21+ t2x/3 and t30< ═ t31+ t3x/3, judging that the valve is blocked and starting a primary alarm; the other conditions are that the valve leaks and a secondary alarm is started;
(2) when the compressor 11 is started and the electromagnetic valve 13 is frozen, setting T1 to T10 before the electromagnetic valve 13 is opened to the freezing, T2 to T20 and T3 to T30, after the electromagnetic valve 13 is switched for 30s, T1 to T11, T2 to T21 and T3 to T31, if T10 to T11, T20 to T21+ T2x and T30 to T31, the electromagnetic valve 13 is normally switched, if the valve is not satisfied, the valve is abnormally switched, if T10 to T11+ T1x/3, T20 to T21+ T2x/2 and T30 to T31+ T3x/3, the valve is judged to be blocked and started to be a primary alarm, and if other conditions are set to be leaked and started to be a secondary alarm;
(3) when the compressor 11 is started and the electromagnetic valve 13 is subjected to temperature change, before the electromagnetic valve 13 is led to the temperature change, T1 is T10, T2 is T20, T3 is T30, after the electromagnetic valve 13 is switched for 30s, T1 is T11, T2 is T21, T3 is T31, if T10 is T11, T20 is T21, T30 is T31+ T3x, the condition is met, the electromagnetic valve 13 is normally switched, if the valve is not met, the abnormal processing is carried out, if T10 is T11+ T1x/3, T20 is T21+ T2x/3, T30 is T31+ T3x/2, the first-stage valve blockage starting alarm is judged, and other conditions are regarded as a second-stage valve leakage starting alarm.
(4) When the compressor 11 is started, and the electromagnetic valve 13 is cooled and frozen, setting T1 to T10 before the electromagnetic valve 13 is opened to freezing, T2 to T20 and T3 to T30, after the electromagnetic valve 13 is switched for 30s, T1 to T11, T2 to T21 and T3 to T31, if T10 to T10 + T1 10, T10 to T10 + T2 10, and T10 to T10, the electromagnetic valve 13 is normally switched if the conditions are met, if the conditions are not met, the valve is abnormally switched, if T10 to T10 + T1 10/2, the valve is T10 + T2 10/2, the condition is T10 to T10 + T3, the valve is judged to be blocked, a first-stage valve is started, and the other conditions are judged to be a two-stage leakage alarm;
(5) when the compressor 11 is started, the electromagnetic valve 13 is refrigerated and subjected to temperature change, the electromagnetic valve 13 is set to be T1-T10 before being refrigerated, T2-T20 and T3-T30, after the electromagnetic valve 13 is switched for 30s, T1-T11, T2-T21 and T3-T31, if T10-T11 + T1x, T20-T21 and T30-T31 + T3x, the electromagnetic valve 13 is judged to be normally switched if the conditions are met, if the conditions are not met, the valve is judged to be abnormally switched, if T10-T11 + T1x/2, T20-T21 + T2x/3, T30-T31 + T3x/2, the valve is judged to be blocked, and a primary-stage leakage alarm is judged, and other conditions are judged to be secondary leakage alarm.
(6) When the compressor 11 is started, the electromagnetic valve 13 is frozen and subjected to temperature change, T1 is T10, T2 is T20, and T3 is T30 before the electromagnetic valve 13 is opened to the freezer, after the electromagnetic valve 13 is switched for 30s, T1 is T11, T2 is T21, and T3 is T31, if T10 is T11, T20 is T21+ T2x, T30 is T31+ T3x, the electromagnetic valve 13 is normally switched if the conditions are met, if the conditions are not met, the valve is abnormally processed, if T10 is T11+ T1x/3, T20 is T21+ T2x/2, T30 is T31+ T3x/2, the valve is judged to be blocked and started to be a first-stage valve alarm, and other conditions are considered to be a second-stage alarm.
(7) When the compressor 11 is started, the electromagnetic valve 13 is refrigerated, frozen and subjected to temperature change, T1 is T10, T2 is T20, and T3 is T30 before the electromagnetic valve 13 is opened to freeze, after the electromagnetic valve 13 is switched for 30s, T1 is T11, T2 is T21, and T21 is T21, at this time, T21 is T21+ T1 21, T21 is T21+ T2 21, T21 is T21+ T3 21, the valve switching is normal when the condition is satisfied, if the valve is not satisfied, the valve is abnormally processed, if T21 is T21+ T1 21/2, T21 is T21+ T2 21/2, the valve is T21+ T3 21+ T21/2, the valve is judged to be a first-stage leakage alarm, and the other conditions are considered as a two-stage alarm.
Referring to fig. 4, fig. 4 is a schematic flowchart of a control method of a refrigerator according to an embodiment of the present invention.
The control method of the refrigerator provided by this embodiment may be applied to the refrigerator provided by any one of the above embodiments, where the refrigerator includes a box body and a refrigeration system, three compartments are provided in the box body, temperature collectors are provided in all three compartments, the refrigeration system includes a compressor, a condenser, an electromagnetic valve, and three evaporators, an outlet of the compressor is connected to an inlet of the electromagnetic valve through the condenser, three outlets of the electromagnetic valve are connected to inlets of the compressor through the three evaporators respectively, the three evaporators are provided in all three compartments, and temperature collectors are provided at inlets of all three evaporators; the method comprises the following steps:
s21, acquiring the internal temperatures of the three chambers and the inlet temperatures of the three evaporators in real time;
s22, judging whether each compartment needs to be refrigerated or not according to the internal temperatures of the three compartments and the corresponding starting temperatures;
s23, when the target compartments needing to be cooled exist, controlling the compressor to start, and controlling the electromagnetic valve to switch the flow direction of the refrigerant to flow to the evaporator corresponding to each target compartment;
s24, judging whether the drop values of the inlet temperatures of the evaporators of the target compartments within a first set time reach corresponding first temperature drop threshold values or not, judging whether the drop values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated within the first set time are not larger than the corresponding first temperature drop threshold values or not, if so, judging that the electromagnetic valve does not break down, otherwise, carrying out fault processing on the electromagnetic valve.
It can be understood that the method is executed by a controller of the refrigerator, and all the temperature collectors collect the temperatures of the positions of the temperature collectors in real time and output the temperatures to the controller, so that the controller can obtain the internal temperatures of the three compartments and the inlet temperatures of the three evaporators in real time, and in step S24, the controller can obtain the decrease values of the inlet temperatures of the three evaporators within a first set time according to the temperatures collected by the temperature collectors at the inlets of the three evaporators.
For example, the three compartments are a refrigerating compartment, a freezing compartment and a temperature-changing compartment, and as shown in fig. 1, the evaporators disposed in the three compartments are a refrigerating evaporator, a freezing evaporator and a temperature-changing evaporator, respectively.
It should be noted that each compartment may correspond to a different starting temperature, and in step S22, when the internal temperature of one of the compartments reaches the starting temperature corresponding to the compartment, it may be determined that the compartment needs to be cooled.
It is understood that, in the step 24, if there is no non-target compartment that does not require cooling, it may be determined that a decrease value of the inlet temperature of the evaporator of each non-target compartment that does not require cooling within the first set time is not greater than the corresponding first temperature decrease threshold, at this time, if it is determined that the decrease value of the inlet temperature of the evaporator of each target compartment within the first set time reaches the corresponding first temperature decrease threshold, it may be determined that the solenoid valve has not failed, otherwise, the solenoid valve is subjected to failure processing.
It should be noted that the method further includes:
judging whether each target compartment needs to stop refrigeration or not according to the internal temperature of each target compartment and the corresponding shutdown temperature;
and controlling the compressor to stop starting when the target compartment needing to stop cooling is determined to exist.
In this embodiment, the internal temperatures of three compartments in the refrigerator and the inlet temperatures of evaporators corresponding to the three compartments are obtained in real time, whether each compartment needs to be refrigerated is judged according to the internal temperatures of the three compartments and the corresponding starting temperatures, when it is determined that a target compartment needing to be refrigerated exists, the compressor is controlled to start, the electromagnetic valve is controlled to switch the flow direction of a refrigerant to flow to the evaporator corresponding to each target compartment, whether the falling values of the inlet temperatures of the evaporators of the target compartments within a first set time reach corresponding first temperature falling threshold values is judged, whether the falling values of the inlet temperatures of the evaporators of the non-target compartments within the first set time are not greater than the corresponding first temperature falling threshold values is judged, and if the falling values of the inlet temperatures of the evaporators of the non-target compartments within the first set time are not greater than the corresponding first temperature falling threshold values, it is judged that the electromagnetic valve fails, otherwise, the electromagnetic valve is subjected to fault processing, so that the trend of the refrigerant can be monitored according to the temperature change of inlets of the evaporators in the electromagnetic valve switching process of the multi-cycle refrigeration system refrigerator, the fault detection and processing can be effectively carried out on the running state of the electromagnetic valve, the refrigeration system can run normally better, the service life of the compressor is prolonged, and the fault rate of the refrigerator is reduced.
Further, the refrigerator also comprises a fault alarm device;
the fault treatment of the electromagnetic valve specifically comprises:
resetting the electromagnetic valves, and after the resetting, re-judging whether the falling values of the inlet temperatures of the evaporators of the target compartments within a first set time reach corresponding first temperature falling threshold values, and whether the falling values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated within the first set time are not more than the corresponding first temperature falling threshold values, if so, judging that the electromagnetic valves are not in failure, otherwise, judging whether the falling values of the inlet temperatures of the three evaporators within the first set time reach corresponding second temperature falling threshold values;
when the fault levels of the electromagnetic valves are determined to be first-level faults when the corresponding second temperature drop thresholds are all determined to be reached, and the fault alarm device is controlled to send out first-level fault alarms;
and when the failure levels of the electromagnetic valves are determined not to reach the corresponding second temperature drop threshold values, determining that the failure levels of the electromagnetic valves are secondary failures, and controlling the failure alarm device to send out secondary failure alarms.
In this embodiment, the solenoid valve is reset to eliminate the failure of the solenoid valve, and after the reset, the state of the solenoid valve is detected again, and when the solenoid valve is still failed, the operating state of the solenoid valve is subjected to failure classification, and a classification alarm is performed to remind a user to process the failure in time.
Further, the second temperature drop threshold corresponding to the evaporator of each target compartment is one half of the drop value of the internal temperature of the target compartment within the first set time;
the second temperature drop threshold corresponding to the evaporator of each non-target compartment which does not need to be cooled is one third of the drop value of the internal temperature of the non-target compartment in the first set time.
Specifically, when the drop values of the inlet temperatures of the three evaporators within the first set time all reach the corresponding second temperature drop threshold value, it is indicated that the electromagnetic valve is blocked, at this time, a primary fault alarm is started, when the drop values of the inlet temperatures of the three evaporators within the first set time do not all reach the corresponding second temperature drop threshold value, it is indicated that the electromagnetic valve leaks, and at this time, a secondary fault alarm is started.
Further, after the controlling the fault alarm device to issue a primary fault alarm, the method further includes:
and controlling the compressor to stop.
In this embodiment, if it is determined that the electromagnetic valve has a first-level fault, it indicates that the electromagnetic valve is blocked, and the compressor needs to be immediately controlled to stop, so as to avoid damage to the compressor.
Further, after the controlling the fault alarm device to issue a secondary fault alarm, the method further includes:
and resetting the electromagnetic valve after a second set time.
In this embodiment, if it is determined that the electromagnetic valve has a secondary fault, it indicates that the electromagnetic valve has a leakage, and at this time, the electromagnetic valve may be reset again after reaching the second set time according to the start-stop point control when the electromagnetic valve is abnormal, so as to restore the electromagnetic valve to a normal state.
As an alternative embodiment, the first temperature drop threshold corresponding to the evaporator of each target compartment is a drop value of the internal temperature of the target compartment within the first set time;
the evaporator of each non-target compartment that does not require refrigeration corresponds to a temperature drop threshold of 0.
It should be noted that, by comparing the temperature difference before and after the electromagnetic valve switches the flow direction at the inlet of the evaporator of the target compartment with the temperature difference before and after the electromagnetic valve switches the flow direction inside the target compartment, and determining whether the temperature difference before and after the electromagnetic valve switches the flow direction at the inlet of the evaporator of the non-target compartment is not more than 0, whether the operation state of the electromagnetic valve is normal can be accurately determined.
As an alternative embodiment, the starting time of the first set time is the time when the solenoid valve starts to switch the flow direction, and the ending time of the first set time is the time after the solenoid valve starts to switch the flow direction for 30 s.
In this embodiment, by setting the start time of the first set time as the time when the solenoid valve starts to switch the flow direction, and setting the end time of the first set time as the time after the solenoid valve starts to switch the flow direction for 30s, it can be ensured that the fault determination is performed after the solenoid valve operates stably, thereby improving the accuracy of the fault determination.
As an alternative embodiment, referring to fig. 3, an outlet of the electromagnetic valve is connected to the evaporator through an evaporation tube, the temperature collector is mounted on the evaporation tube through a clamping seat, and a distance between the temperature collector and the evaporator is 3 cm.
In this embodiment, the temperature collector passes through the cassette to be fixed on the evaporating pipe, and 3cm apart from the evaporimeter can influence the temperature collector when avoiding the evaporimeter frosting, the detection temperature that again can be sensitive.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
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:
the refrigerator comprises a box body, a cabinet body and a control device, wherein three chambers are arranged in the box body, and temperature collectors are arranged in the three chambers;
the refrigeration system comprises a compressor, a condenser, an electromagnetic valve and three evaporators; the outlet of the compressor is connected with the inlet of the electromagnetic valve through the condenser, the three outlets of the electromagnetic valve are respectively connected with the inlet of the compressor through the three evaporators, the three evaporators are respectively arranged in the three compartments, and the inlets of the three evaporators are respectively provided with a temperature collector;
a controller connected to the compressor, the solenoid valve, and all of the temperature collectors, configured to:
acquiring the internal temperatures of the three chambers and the inlet temperatures of the three evaporators in real time;
judging whether each compartment needs to be refrigerated or not according to the internal temperatures of the three compartments and the corresponding starting temperatures;
when the target chambers needing to be refrigerated exist, controlling the compressor to start, and controlling the electromagnetic valve to switch the flow direction of the refrigerant to flow to the evaporator corresponding to each target chamber;
and judging whether the drop values of the inlet temperatures of the evaporators of the target compartments in a first set time reach corresponding first temperature drop threshold values or not, and whether the drop values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated in the first set time are not more than the corresponding first temperature drop threshold values or not, if so, judging that the electromagnetic valve does not break down, otherwise, carrying out fault processing on the electromagnetic valve.
2. The refrigerator of claim 1, wherein the refrigerator further comprises a malfunction alerting device;
the fault treatment of the electromagnetic valve specifically comprises:
resetting the electromagnetic valves, and after the resetting, re-judging whether the falling values of the inlet temperatures of the evaporators of the target compartments within a first set time reach corresponding first temperature falling threshold values, and whether the falling values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated within the first set time are not more than the corresponding first temperature falling threshold values, if so, judging that the electromagnetic valves are not in failure, otherwise, judging whether the falling values of the inlet temperatures of the three evaporators within the first set time reach corresponding second temperature falling threshold values;
when the fault levels of the electromagnetic valves are determined to be first-level faults when the corresponding second temperature drop thresholds are all determined to be reached, and the fault alarm device is controlled to send out first-level fault alarms;
and when the failure levels of the electromagnetic valves are determined not to reach the corresponding second temperature drop threshold values, determining that the failure levels of the electromagnetic valves are secondary failures, and controlling the failure alarm device to send out secondary failure alarms.
3. The refrigerator according to claim 2, wherein the second temperature drop threshold corresponding to the evaporator of each of the target compartments is one-half of the drop value of the internal temperature of the target compartment within the first set time;
the second temperature drop threshold corresponding to the evaporator of each non-target compartment which does not need to be cooled is one third of the drop value of the internal temperature of the non-target compartment in the first set time.
4. The refrigerator of claim 2, wherein the controller, after the controlling the fault alert device to issue a primary fault alert, is further configured to:
and controlling the compressor to stop.
5. The refrigerator of claim 2, wherein the controller, after the controlling the malfunction alerting device to issue a secondary malfunction alert, is further configured to:
and resetting the electromagnetic valve after a second set time.
6. The refrigerator as claimed in claim 1, wherein the first temperature drop threshold corresponding to the evaporator of each of the target compartments is a drop value of the internal temperature of the target compartment within the first set time;
the evaporator of each non-target compartment that does not require refrigeration corresponds to a temperature drop threshold of 0.
7. The refrigerator as claimed in claim 1, wherein a start time of the first set time is a time when the solenoid valve starts to switch the flow direction, and an end time of the first set time is a time after the solenoid valve starts to switch the flow direction for 30 s.
8. The refrigerator as claimed in claim 1, wherein the outlet of the solenoid valve is connected to the evaporator through an evaporation tube, the temperature collector is mounted on the evaporation tube through a clamping seat, and a distance between the temperature collector and the evaporator is 3 cm.
9. The control method of the refrigerator is characterized in that the refrigerator comprises a refrigerator body and a refrigerating system, three chambers are arranged in the refrigerator body, temperature collectors are arranged in the three chambers, the refrigerating system comprises a compressor, a condenser, an electromagnetic valve and three evaporators, an outlet of the compressor is connected with an inlet of the electromagnetic valve through the condenser, three outlets of the electromagnetic valve are connected with inlets of the compressor through the three evaporators respectively, the three evaporators are arranged in the three chambers respectively, and the inlets of the three evaporators are provided with the temperature collectors; the method comprises the following steps:
acquiring the internal temperatures of the three chambers and the inlet temperatures of the three evaporators in real time;
judging whether each compartment needs to be refrigerated or not according to the internal temperatures of the three compartments and the corresponding starting temperatures;
when the target chambers needing to be refrigerated exist, controlling the compressor to start, and controlling the electromagnetic valve to switch the flow direction of the refrigerant to flow to the evaporator corresponding to each target chamber;
and judging whether the drop values of the inlet temperatures of the evaporators of the target compartments in a first set time reach corresponding first temperature drop threshold values or not, and whether the drop values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated in the first set time are not more than the corresponding first temperature drop threshold values or not, if so, judging that the electromagnetic valve does not break down, otherwise, carrying out fault processing on the electromagnetic valve.
10. The control method of a refrigerator according to claim 9, wherein the refrigerator further comprises a malfunction alerting device;
the fault treatment of the electromagnetic valve specifically comprises:
resetting the electromagnetic valves, and after the resetting, re-judging whether the falling values of the inlet temperatures of the evaporators of the target compartments within a first set time reach corresponding first temperature falling threshold values, and whether the falling values of the inlet temperatures of the evaporators of the non-target compartments which do not need to be refrigerated within the first set time are not more than the corresponding first temperature falling threshold values, if so, judging that the electromagnetic valves are not in failure, otherwise, judging whether the falling values of the inlet temperatures of the three evaporators within the first set time reach corresponding second temperature falling threshold values;
when the fault levels of the electromagnetic valves are determined to be first-level faults when the corresponding second temperature drop thresholds are all determined to be reached, and the fault alarm device is controlled to send out first-level fault alarms;
and when the failure levels of the electromagnetic valves are determined not to reach the corresponding second temperature drop threshold values, determining that the failure levels of the electromagnetic valves are secondary failures, and controlling the failure alarm device to send out secondary failure alarms.
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