CN113154757B - Refrigerator and temperature control method thereof - Google Patents

Refrigerator and temperature control method thereof Download PDF

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Publication number
CN113154757B
CN113154757B CN202110474344.6A CN202110474344A CN113154757B CN 113154757 B CN113154757 B CN 113154757B CN 202110474344 A CN202110474344 A CN 202110474344A CN 113154757 B CN113154757 B CN 113154757B
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Prior art keywords
temperature
refrigerator
time
cabinet
control mode
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CN113154757A (en
Inventor
马洪奎
殷善民
王尧
李庆波
相修华
张永军
王统治
高阳
王森
赵光谱
娄杨伟
赵昌磊
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Qingdao Hiron Commercial Cold Chain Co Ltd
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Qingdao Hiron Commercial Cold Chain Co Ltd
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Priority to CN202110474344.6A priority Critical patent/CN113154757B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/028—Details
    • 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
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • 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 discloses a refrigerator and a temperature control method thereof, comprising a control system; the cabinet body is provided with a door body and a compressor; the first temperature detector is arranged outside the cabinet body, electrically connected with the control system and used for detecting the external environment temperature of the cabinet body; the second temperature detector and the third temperature detector are arranged in the cabinet body, electrically connected with the control system and electrically connected with the control system; the door opening detector is arranged in the cabinet body and electrically connected with the control system and used for detecting the opening and closing of the door body. The opening and closing of the door body can be detected in real time through the door opening detector, and when the door body is detected to be in an opening state, the refrigerator can be correspondingly adjusted, so that the problem that the temperature fluctuation in the refrigerator body is large due to manual opening or untight closing of the door body is avoided, and the storage quality of goods is influenced; through adopting above structure make the freezer can in time adjust the internal temperature fluctuation of cabinet. The technical problem that the temperature fluctuation of the refrigerator in the prior art cannot be timely adjusted is solved.

Description

Refrigerator and temperature control method thereof
Technical Field
The invention belongs to the technical field of refrigeration equipment, and particularly relates to a refrigerator and a temperature control method thereof.
Background
The refrigerator is a refrigeration device widely applied to the fields of business trip, retail, cold chain logistics and the like, generally, the refrigerator adopts a vapor compression refrigeration system for refrigeration, and the temperature in the refrigerator is generally measured by a temperature sensing bag in the refrigerator. When the temperature in the cabinet is higher than the set temperature, the compressor (refrigerating system) operates; and when the temperature in the cabinet is lower than the set temperature, the compressor stops running.
However, in the refrigerator having the above structure, there is a delay in temperature response of the bulb, and a certain time is required for the refrigerating system to adjust the temperature of the goods. Therefore, when the temperature in the refrigerator fluctuates due to external disturbance, the temperature response of the temperature sensor lags behind, and the refrigeration system is difficult to recover quickly, so that the temperature in the refrigerator fluctuates greatly, and the storage quality of goods is affected.
Disclosure of Invention
The invention aims to provide a refrigerator, which solves the technical problem that the fluctuation of the temperature in the refrigerator in the prior art cannot be timely adjusted.
In order to realize the purpose, the invention adopts the following technical scheme:
a refrigerator, which comprises a refrigerator body and a refrigerator door,
a control system;
the refrigerator comprises a cabinet body, a door body and a compressor, wherein the cabinet body is provided with the door body and the compressor;
the first temperature detector is arranged outside the cabinet body, is electrically connected with the control system and is used for detecting the external environment temperature of the cabinet body;
the second temperature detector is arranged in the cabinet body, is electrically connected with the control system and is used for detecting the temperature in the cabinet body;
the third temperature detector is arranged in the cabinet body and close to one side of the door body, is electrically connected with the control system and is used for detecting the temperature close to the side of the door body;
and the door opening detector is arranged in the cabinet body and is electrically connected with the control system for detecting the opening and closing of the door body.
In some of the embodiments described herein, the first and second,
a first timer is arranged in the cabinet body and electrically connected with the control system for recording the running refrigeration time of the compressor; and a second timer is also arranged in the cabinet body, is electrically connected with the door opening detector and the control system and is used for recording the time length for opening the door body.
The cabinet is internally provided with an alarm, the alarm is electrically connected with the control system, and when the door opening time exceeds an early warning value, the alarm is started to give an alarm.
A temperature control method of a refrigerator is applied to any one of the refrigerator and comprises the following steps:
s1: the first temperature detector collects the outside temperature T0Ambient temperature cycle variation value Δ T0(ii) a The second temperature detector collects the temperature T in the cabinet1Value of periodic variation of temperature Δ T in cabinet1(ii) a The third temperature detector collects the temperature T close to the inner side of the door body2Value of cyclic variation of temperature Δ T near the inside of the door body2；
S2: acquiring the working state of a door body;
s3: when the door body is opened, the refrigerator works in a first type of advanced temperature regulation control mode;
when the door body is closed, the outside temperature period change value delta T is judged0Temperature change threshold delta T preset with outsidemThe size of (d);
if Δ T0>ΔTmThe refrigerator works in a second type advanced temperature regulation control mode;
if Δ T0≤ΔTmAt this time, the freezer operates in a conventional control mode.
In some of these embodiments, between the steps S1 and S2,
judging the temperature period change value delta T in the cabinet1With a preset temperature variation threshold delta T in the cabinetnThe size of (2):
if Δ T1>ΔTnThe refrigerator works in a continuous temperature-drawing mode;
if Δ T1≤ΔTnThe freezer operates in a normal control mode.
In some embodiments, the first type of lead thermostat control mode specifically includes,
when the refrigerating system is a constant-frequency compressor, the single-running refrigerating time is prolonged; when the compressor of the refrigeration system is in variable frequency, the refrigeration running frequency is improved.
In some embodiments, the first type of lead thermostat control mode further comprises,
in the process of adjusting the first type of advanced temperature adjusting control mode, continuously judging whether the door body is still in an opening state:
if so, collecting the door opening time, and prolonging the single-time operation refrigeration time along with the prolonging of the door opening time;
if not, judging the periodic variation rate V of the temperature in the cabinetT1With a predetermined rate of change of temperature V in the cabinetTnThe size of (2):
if VT1﹤VTnThe extension of the single-operation refrigeration time is kept or the refrigeration operation frequency is improved;
if VT1≥VTnAnd the refrigerator exits the first type of advanced temperature regulation control mode and returns to the conventional control mode.
In some of these embodiments, the first type of lead thermostat control mode further includes,
and judging the size between the door opening time and the door opening time early warning value, and when the door opening time is greater than the door opening time early warning value, giving an alarm by using the alarm.
In some embodiments, the second type of advanced temperature adjustment control mode specifically includes determining a change in ambient temperature,
when the outside temperature rises, if the refrigeration system is a fixed-frequency compressor, the single-operation refrigeration time is prolonged; if the refrigerating system is a variable frequency compressor, the refrigerating operation frequency is increased;
when the external temperature is reduced, if the refrigerating system is a constant-frequency compressor, the single-operation refrigerating time is reduced; and if the refrigerating system is a variable frequency compressor, reducing the refrigerating operation frequency.
In some of these embodiments, the second type of lead thermostat control mode further includes,
judging the periodic variation rate V of the temperature in the cabinetT1With a predetermined rate of change of temperature V in the cabinetTnThe size of (2):
when V isT1≥VTnWhen the refrigerator exits the second type of advanced temperature regulation control mode, the conventional control mode is recovered;
when V isT1﹤VTnMeanwhile, the refrigerator keeps a second type of advanced temperature regulation control mode; and judging:
periodic variation rate V of temperature of inner side of door bodyT2A first preset temperature change rate V between the inner side of the door body and the inner side of the door bodyTcThe size of (2):
when V isT2﹤VTcIn the time, the amplitude of prolonging the single-operation refrigerating time of the refrigerating system is kept unchanged;
when V isT2≥VTcWhen the refrigerating system is used, the amplitude of prolonging the single-operation refrigerating time is reduced;
in some embodiments, the method further comprises a defrosting step, specifically comprising:
when the refrigerator operates for the total time tzGreater than a preset run time threshold taWhen, or when, the temperature T of the evaporatorrLess than a predetermined temperature Tr0When the refrigerator is in the defrosting mode, the refrigerator enters the defrosting mode;
total refrigerating running time t of the refrigeratorzIs less than a preset running time threshold taWhen, or when, the temperature T of the evaporatorrGreater than a predetermined temperature Tr0In time, the freezer need not enter defrost mode.
Compared with the prior art, the invention has the advantages and positive effects that:
1. the invention provides a refrigerator, which is characterized in that a first temperature detector is arranged outside the refrigerator and is used for detecting the external environment temperature and the temperature change of a cabinet body; a second temperature detector is arranged in the cabinet body and used for detecting the ambient temperature and the temperature change in the cabinet, and a third temperature detector is arranged in the cabinet body close to the inner side of the door body and used for detecting the ambient temperature and the temperature change close to the inner side of the door body; and meanwhile, a door opening detector is arranged for detecting the opening and closing of the door body. Through adopting above structure, make the freezer can be according to first thermodetector, the second thermodetector, the temperature that the third thermodetector detected, carry out corresponding regulation to the internal temperature of cabinet in advance, it is big to have avoided leading to the internal temperature fluctuation of cabinet because external environment temperature changes greatly, and simultaneously, through setting up the switching that the door detector can the real-time detection door body, when the door body is detected to be in the open mode, the freezer can carry out corresponding regulation, thereby also avoided opening the door or closing untight because of artificial, lead to the internal temperature fluctuation of cabinet big, thereby the storage quality of goods has been influenced. The structure makes the freezer can in time adjust the temperature fluctuation in the freezer body through adopting more than. The technical problem that the temperature fluctuation of the refrigerator in the prior art cannot be timely adjusted is solved.
2. The invention provides a temperature control method of a refrigerator, which comprises a first advanced temperature regulation control mode and a second advanced temperature regulation control mode. And the refrigerator is judged to execute a first type advanced temperature regulation control mode or a second type advanced temperature regulation control mode by judging the working state of the door body and the periodic variation value of the external temperature. Specifically, when the door body is opened, the cabinet body executes a first-type advanced temperature regulation control mode to regulate the temperature in the cabinet body in time; when the door body is closed, the ambient temperature periodic variation value delta T is further judged0A preset temperature change threshold delta T with the outsidemWhen Δ T is large or small0>ΔTmIn time, the fluctuation within the external temperature cycle time is large, so that the temperature in the cabinet body can be influenced; the freezer carries out the leading temperature regulation control mode of second type this moment for the freezer can in time adjust the internal temperature fluctuation of cabinet. The technical problem that the temperature fluctuation of the refrigerator in the prior art cannot be timely adjusted is solved.
Drawings
Fig. 1 is a flowchart of a temperature control method for a refrigerator according to an embodiment of the present invention;
fig. 2 is a flowchart of a first advanced temperature adjustment control mode of a refrigerator according to an embodiment of the present invention;
fig. 3 is a flowchart of a second advanced temperature adjustment control mode of a refrigerator according to an embodiment of the present invention.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", "first", "second", etc. indicate orientations or positional relationships based on the positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present application, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; either directly or through an intermediary profile. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The technical scheme in the embodiment of the application is for solving the technical problem that the fluctuation of freezer to the incasement temperature can't in time be adjusted among the prior art. The general idea is as follows:
the invention provides a refrigerator, which is characterized in that a first temperature detector is arranged outside the refrigerator and is used for detecting the external environment temperature and the temperature change of a cabinet body; the cabinet is internally provided with a second temperature detector for detecting the ambient temperature and the temperature change in the cabinet, and the door opening detector is arranged for detecting the opening and closing of the door body. By adopting the structure, the refrigerator can correspondingly adjust the temperature in the refrigerator body in advance according to the temperatures detected by the first temperature detector and the second temperature detector, so that the problem that the temperature in the refrigerator body fluctuates greatly due to large external environment temperature change is avoided, meanwhile, the opening and closing of the door body can be detected in real time by arranging the door opening detector, when the door body is detected to be in an opening state, the refrigerator can correspondingly adjust, and the problem that the temperature in the refrigerator body fluctuates greatly due to manual opening or closing is not tight is also avoided, so that the storage quality of goods is influenced; the structure makes the freezer can in time adjust the temperature fluctuation in the freezer body through adopting more than. The technical problem that the temperature fluctuation of the refrigerator in the prior art cannot be timely adjusted is solved.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
The invention provides a refrigerator, which comprises a refrigerator body,
a refrigerator, which comprises a refrigerator body and a refrigerator door,
a control system;
the refrigerator comprises a cabinet body, wherein a door body and a compressor are arranged on the cabinet body;
the first temperature detector is arranged outside the cabinet body, is electrically connected with the control system and is used for detecting the external environment temperature of the cabinet body;
the second temperature detector is arranged in the cabinet body, is electrically connected with the control system and is used for detecting the temperature in the cabinet body;
the third temperature detector is arranged in the cabinet body and close to one side of the door body, is electrically connected with the control system and is used for detecting the temperature close to the side of the door body;
and the door opening detector is arranged in the cabinet body and is electrically connected with the control system for detecting the opening and closing of the door body.
Specifically speaking, the external portion of cabinet is provided with first thermodetector, and the internal portion of cabinet is provided with second thermodetector, and the internal just inboard that is close to the door body of cabinet is provided with third thermodetector, detects external ambient temperature through first thermodetector, detects the temperature in the cabinet through second thermodetector, detects the temperature that is close to the inboard of the door body through third thermodetector simultaneously. In this embodiment, first temperature detect ware, second temperature detect ware and third temperature detect ware all adopt temperature sensor, from this through this first temperature detect ware, second temperature detect ware and third temperature detect ware for the freezer can carry out corresponding and reasonable regulation according to corresponding temperature and temperature variation value to the temperature in the cabinet.
Further, a first timer is arranged in the cabinet body and electrically connected with the control system for recording the running and refrigerating time of the compressor. Meanwhile, a second timer is further arranged in the cabinet body and electrically connected with the door opening detector and the control system and used for recording the time length of opening the door body. The cabinet is internally provided with an alarm which is electrically connected with the second timer and the control system, and when the door opening time exceeds the door opening time early warning value, the alarm is started to give an alarm. The opening and closing of the door body can be detected in real time through the door opening detector, and when the door body is detected to be in an opening state, the refrigerator can be correspondingly adjusted, so that the problem that the temperature fluctuation in the cabinet body is large due to manual opening or untight closing of the door body is avoided, and the storage quality of goods is influenced; the refrigerator can timely adjust the temperature fluctuation in the refrigerator body by adopting the structure; thereby the technical problem that the temperature fluctuation of the refrigerator in the prior art can not be adjusted in time is solved. Simultaneously, through setting up the second timer, be in the state that the door body was opened abnormally under, can send out the police dispatch newspaper and make the user in time discover to temperature fluctuation is great in the further freezer of having avoided.
As shown in fig. 1, the present invention further provides a temperature control method of a refrigerator, which specifically comprises,
the first temperature detector collects the outside temperature T0Ambient temperature cycle variation value Δ T0(ii) a Second temperature detectorTemperature T in collection cabinet1And periodic variation value delta T of temperature in cabinet1(ii) a The third temperature detector collects the temperature T close to the inner side of the door body2Value of cyclic variation of temperature Δ T near the inside of the door body2；
S2: acquiring the working state of a door body;
s3: when the door body is opened, the refrigerator works in a first type of advanced temperature regulation control mode;
when the door body is closed, the outside temperature period change value delta T is judged0Temperature change threshold delta T preset with outsidemThe size of (d);
if Δ T0>ΔTmThe refrigerator works in a second type advanced temperature regulation control mode;
if Δ T0≤ΔTmAt this time, the freezer operates in a conventional control mode. By adopting the method, the refrigerator can adjust the temperature in the cabinet body according to the working state of the door body, namely when the door body is opened, the refrigerator executes a first-type advanced temperature adjustment control mode to adjust the temperature in the cabinet body in time; when the door body is closed, the ambient temperature periodic variation value delta T is further judged0Temperature change threshold delta T preset with outsidemWhen Δ T is large or small0>ΔTmIn time, the fluctuation within the external temperature cycle time is large, so that the temperature in the cabinet body can be influenced; the freezer carries out the leading temperature regulation control mode of second type this moment for the freezer can in time adjust the internal temperature fluctuation of cabinet. Therefore, the technical problem that the temperature fluctuation of the refrigerator in the prior art cannot be timely adjusted is solved.
Further, the method also includes determining a difference Δ T between the maximum temperature value and the minimum temperature value during the period of time in the cabinet between the step S1 and the step S21With a preset temperature variation threshold delta T in the cabinetnAnd continuously judging n periods;
if Δ T1>ΔTnThe refrigerator works in a continuous temperature-pulling mode;
if Δ T1≤ΔTnThe freezer operates in a normal control mode.
Specifically, when the refrigerator starts to operate, the temperature inside the refrigerator is first detected by the second temperature detector. And after the refrigerator runs, judging whether the refrigerator enters a stable running stage. Whether the temperature is stable or not, i.e. the load temperature fluctuates in a period of time, in other words, the difference Δ T between the maximum temperature value and the minimum temperature value in the period of time is determined1With a preset temperature variation threshold delta T in the cabinetnThe size of (2). If the delta T is continuously kept in the refrigerator1>ΔTnAnd when the refrigerator is in a temperature-pulling stage, the refrigerating system is normally opened, so that the temperature is quickly pulled. If delta T in the refrigerator1≤ΔTnThe refrigerator works in a conventional control mode; and continuously judges n cycles. When the cabinet body enters a conventional control mode, the refrigeration system is controlled according to the temperature measured by the second temperature detector in the cabinet: for a refrigeration system using a fixed frequency compressor, a two-position control is employed: when the temperature T in the cabinet1When the temperature is higher than the preset temperature threshold value of the cabinet body, the refrigerating system is started; when the temperature T in the cabinet1And when the temperature is lower than the preset temperature threshold value of the cabinet body, the refrigeration system stops running. For a refrigeration system using an inverter compressor (inverter fan), then the temperature is regulated with a regulation frequency: when the temperature T in the cabinet1When the temperature is higher than the preset temperature threshold value of the cabinet body, the operation frequency of the refrigerating system is increased; when the temperature T in the cabinet1When the temperature is lower than the preset temperature threshold value of the cabinet body, the operation frequency of the refrigerating system is reduced.
S2: acquiring the working state of a door body;
specifically, the cabinet body is provided with a door opening detector for detecting the opening and closing state of the door body. Because the freezer carries out the action of opening the door after, the heat load of door body department risees, can lead to the inside temperature of freezer to rise, especially is close to the inboard storing temperature of the door body, consequently can make control system control refrigerating system carry out leading temperature's regulation to the freezer that is in the state of opening the door through setting up this detector of opening the door to temperature fluctuation is great in avoiding the freezer.
S3: when the door body is opened, the refrigerator works in a first type advanced temperature regulation control mode;
when the door body is closed, the external temperature is judgedDifference value delta T between maximum temperature value and minimum temperature value in degree cycle time0Temperature change threshold delta T preset with outsidemThe size of (d);
if Δ T0>ΔTmThe refrigerator works in a second type advanced temperature regulation control mode;
if Δ T0≤ΔTmAt this time, the freezer operates in a conventional control mode.
Specifically, the lead thermostat control modes include a first type of lead thermostat control mode and a second type of lead thermostat control mode. In other words, the advanced temperature control mode is divided into an advanced temperature control mode for controlling the door opening operation and an advanced temperature control mode for controlling the ambient temperature according to the entering manner. And if the refrigerator in-opening door detector detects the door opening action, recording the door opening time, and performing a first-type advanced temperature regulation control mode controlled by the door opening action according to the working state and the door opening time of the door body. If the door is not opened, a first temperature detector is arranged outside the refrigerator, the ambient temperature is recorded once at intervals of preset time, the ambient temperature at the current moment is recorded into a control system, and the control system records continuous ambient temperature change data. In the stable operation stage, the difference value delta T is changed according to the period of the external temperature0Temperature change threshold delta T preset with outsidemTo determine whether to enter a second type of advanced temperature regulation control mode. When the ambient temperature changes periodically by a value delta T0Greater than the external preset temperature change threshold value Delta TmAnd if not, performing a conventional control mode. In summary, the advanced temperature adjustment control mode is to perform advanced adjustment on the temperature in the refrigerator according to the door opening and closing action and the ambient temperature change, and forcibly change the parameter of the single operation time of the refrigeration system. For example, for a refrigeration system using a fixed-frequency compressor, the lead-temperature adjustment control mode is to forcibly adjust the single operation time according to the operation time and temperature change of the previous period and the door opening action; for systems using an inverter compressor (inverter fan), the operating frequency is adjusted according to the above parameters. At the same time, by in the refrigeratorThe second temperature detector and the third temperature detector which are arranged in the refrigerator continuously detect the temperature inside the refrigerator and close to the door side, and send the temperature data to the control system, and the control system records the continuous temperature change data in the refrigerator. The refrigerator is internally provided with a first timer for recording the running refrigeration time of the compressor, the running time of the compressor is conveyed to the control system, the control system can calculate the change rate of the temperature in the refrigerator according to the relation between the temperature change value and the running time of the compressor, and therefore the control system can change the control mode of the refrigeration system according to the change rate of the temperature in the refrigerator.
As shown in fig. 2, in this embodiment, the first type of advanced temperature adjustment control mode specifically includes the following steps:
the first type of advanced temperature regulation control mode specifically comprises,
when the compressor of the refrigeration system is in a fixed frequency, the single-operation refrigeration time is prolonged; when the refrigerating system is a variable-frequency compressor, the operating frequency is increased.
The first type of advanced thermostat control mode, further comprising,
in the process of adjusting the first type of advanced temperature adjusting control mode, continuously judging whether the door body is still in an open state:
if so, acquiring the door opening time, and prolonging the single-time operation refrigeration time along with the prolonging of the door opening time;
if not, judging the periodic variation rate V of the temperature in the cabinetT1With a predetermined rate of change of temperature V in the cabinetTnThe size of (2):
if VT1﹤VTnThe extension of the single-time operation refrigeration time is kept or the refrigeration operation frequency is increased;
if VT1≥VTnAnd the refrigerator exits the first type of advanced temperature regulation control mode and returns to the conventional control mode.
Specifically, when the door opening detector detects that the door body is opened, the second timer starts to record the door opening time, and in the stable operation stage, the advanced temperature regulation control mode caused by the door opening action is carried out according to the door opening action and the door opening time, namely, the first type advanced temperature regulation control mode is entered.
When the refrigerating system adopted by the refrigerator is a constant-frequency compressor, the control system controls the refrigerating system to prolong the single-operation refrigerating time, and if the original single-operation refrigerating time is recorded as t1And the single-time running refrigeration time after the door is opened is t1+t2And t is2Is greater than 0; thereby compensating for the increased thermal load in the cabinet caused by the door opening by extending the cooling operation time. And when the door opening time exceeds a preset door opening time threshold value, for example, the preset door opening time threshold value is 5min, the control system judges that the door opening is an abnormal purchasing behavior to cause a door opening action, and t2The door opening time is increased, namely the longer the door opening time is, the longer the refrigerating time is, and the refrigerating time is, the longer the refrigerating time is, and the refrigerating time is, and the refrigerating time is long, the refrigerating time is, and the refrigerating time is long, and the refrigerating time is long, and the refrigerating time is long, and the refrigerating time is2The longer.
When the refrigerating system adopted by the refrigerator is a variable frequency compressor, the increased heat load in the refrigerator body caused by opening the door is compensated by increasing the running frequency.
Further, the first-type advanced temperature regulation control mode further comprises the step of judging the size between the door opening time and the door opening time early warning value. And when the door opening time is greater than the door opening time early warning value, the alarm gives an alarm. If the door opening time exceeds the early warning value, for example, 10min (depending on the use environment and the type of the refrigerator), the control system judges that the refrigerator is not normally closed, and gives an alarm indication, and the alarm can be closed through the control system or the door closing action.
When the door opening detector detects that the door body is changed from an opening state to a closing state, if the heat load during the door opening process is higher than a preset temperature value, the whole temperature in the cabinet can be increased, and the refrigerating system performs advanced temperature regulation for a period of time to compensate the operation, namely the single operation refrigerating time is kept to be prolonged or the operation frequency is increased. Meanwhile, the temperature periodic variation rate V in the refrigerator is continuously detected by a second temperature detectorT1With a predetermined rate of change of temperature V in the cabinetTn to determine whether to end the first advanced temperature regulation control mode when the temperature cycle variation rate V in the cabinetT1Greater than or equal to the preset temperature change rate V in the cabinetTnThe refrigerating capacity of the refrigerating system is sufficient, and the recovery can be realizedAnd when the temperature control mode is normal, otherwise, the first leading temperature regulation control mode is continuously executed to compensate the refrigeration capacity loss caused by the door opening. In other words,
if VT1﹤VTnThe extension of the refrigeration running time of the compressor is kept or the running frequency of the compressor is increased;
if VT1≥VTnAnd the refrigerator exits the first type of advanced temperature regulation control mode and returns to the conventional control mode.
As shown in fig. 3, the second type of advanced temperature adjustment control mode specifically includes the following steps:
the change of the outside temperature is judged,
when the outside temperature T is0When the temperature rises, if the refrigeration system is a fixed-frequency compressor, the single-operation refrigeration time is prolonged; if the refrigerating system is a variable frequency compressor, the refrigerating operation frequency is increased;
when the outside temperature T is0When the temperature is reduced, if the refrigeration system is a fixed-frequency compressor, the single-operation refrigeration time is reduced; and if the refrigerating system is a variable frequency compressor, reducing the refrigerating operation frequency.
The second type of lead thermostat control mode also includes,
judging the periodic variation rate V of the temperature in the cabinetT1With a predetermined rate of change of temperature V inside the cabinetTnThe size of (2):
when V isT1≥VTnWhen the refrigerator exits the second type of advanced temperature regulation control mode, the conventional control mode is recovered;
when V isT1﹤VTnMeanwhile, the refrigerator keeps a second type of advanced temperature regulation control mode; and judging the periodic variation rate V of the temperature at the inner side of the door bodyT2The preset temperature change rate V of the inner side of the door bodyTcThe size of (2):
when V isT2﹤VTcIn the time, the amplitude of prolonging the single-operation refrigerating time of the refrigerating system is kept unchanged;
when V isT2≥VTcWhen the refrigerating system is used, the amplitude of prolonging the single-operation refrigerating time is reduced;
specifically, the invention relates toThe first temperature detector detects the change of the external environment, and the periodic change value delta T of the external temperature0Greater than the external preset temperature change threshold value Delta TmThe explanation external environment temperature change is showing, and the freezer gets into the leading regulation mode of second from this to can avoid the internal big fluctuation because external environment temperature environmental change brought of cabinet, the leading temperature regulation control mode of second type includes:
if the outside temperature T is present0,iGreater than the external temperature T of the previous moment0,i-1When the external temperature is increased, and the refrigerating system of the refrigerator adopts a constant-frequency compressor, the single refrigerating operation time of the refrigerating system is prolonged; i.e. the single cooling run time t of the conventional control mode before entering lead regulation3On the basis of the operation time of the refrigerating system, the operation time of the refrigerating system is increased by t4I.e. the single cooling operation time in this state is t3+t4E.g. the time t4May be the original running time t35% of and the outside temperature T0,iWith the ambient temperature T of the immediately preceding moment0,i-1The larger the difference between, t4The larger; if the temperature at that moment is outside temperature T0,iLess than the external temperature T of the previous moment0,i-1The refrigerating system is reduced in the refrigerating operation time, i.e. the refrigerating operation time t of the conventional control mode before the advance regulation is started3On the basis of the operation time of the refrigerating system, the operation time of the refrigerating system is reduced by t4I.e. the single cooling operation time in this state is t3-t4And t is and t3＞t4And the temperature outside temperature T0,iWith the ambient temperature T of the immediately preceding moment0,i-1The larger the difference between t4The larger. I.e. time t4And the change value of the external environment is in a direct proportional function relationship.
Namely, after the refrigerator runs for a period of time in the second advanced temperature regulation mode, the temperature reduction change speed V of the inner side of the door body is judgedT2A first preset temperature change rate V between the inner side of the door body and the inner side of the door bodyTcThe size of (2):
if VT2Less than VTcThen keeping the running time of the refrigerating system at t3+t4；
If VT2Is greater than or equal to VTcWhen the temperature in the cabinet is changed too fast, the running time of the refrigerating system is t when the refrigerating capacity is sufficient3+t5And 0 is<t5<t4。
And if the temperature is in a stable state after continuously operating for a plurality of periods, the normal temperature control mode is recovered.
For systems using variable frequency compressors (variable frequency fans), the two-position control is not used, but the operating frequency of the moving mechanism is directly controlled. Under the above conditions, the operation frequency is increased when the single operation time of the refrigeration system needs to be extended, and the operation frequency is decreased when the single operation time of the refrigeration system needs to be shortened.
Meanwhile, the change rate V of the temperature of the inner side of the door body can be judged in the embodimentT2The second preset temperature change rate V with the inner side of the door bodyTaTo determine whether the second type of advanced temperature regulation control mode can be exited. Because the heat load of the inner side of the door body is higher than that of other building envelopes (the heat and mass exchange of the air inside and outside the door sealing side cabinet and the heat radiation of the door side of the door glass door freezer), whether the second advanced temperature regulation control mode is finished or not is judged by detecting the temperature close to the inner side of the door body.
When the temperature change rate V of the inner side of the door bodyT2Too fast, i.e. VT2Greater than VTaThe second type of lead thermostat control mode is stopped. Because the second type of advanced temperature regulation control mode is essentially that the refrigeration system provides excessive refrigerating capacity (or reduces the refrigerating capacity in advance) in advance to offset or reduce the influence caused by disturbance by judging the disturbance magnitude, when the temperature change rate of the inner side of the door body is too fast, the advanced regulation quantity can be considered to be higher than the influence of the disturbance, and therefore the second type of advanced temperature regulation control mode can be stopped and the normal control mode can be recovered.
In other words, the temperature decrease change speed V of the inner side of the cabinet is judgedT2A second predetermined temperature variation rate V from the inner side of the cabinetTaThe size of (c):
when V isT2﹤VTaIn time, the refrigerator keepsA second type of advanced temperature regulation control mode;
when V isT2≥VTaAnd when the temperature in the cabinet is changed too fast, the second advanced temperature regulation control mode is terminated, and the normal control mode is recovered.
In this embodiment, the temperature control method for the refrigerator further includes a defrosting step, which specifically includes:
when the refrigerator operates for the total time tzGreater than a preset run time threshold taIn time of, or at, the temperature T of the evaporatorrLess than a predetermined temperature Tr0When the refrigerator is in the defrosting mode, the refrigerator enters the defrosting mode;
when the refrigerator operates for the total time tzLess than a predetermined running time threshold taIn time of, or at, the temperature T of the evaporatorrGreater than a predetermined temperature Tr0In time, the freezer need not enter defrost mode.
The defrosting step is performed independently, and has the highest priority, and this step needs to be performed preferentially each time before step S2 is performed. Namely, before judging whether the temperature in the cabinet needs to be subjected to advanced temperature regulation or not, the defrosting step needs to be judged first. And when the defrosting condition is reached, the refrigerator interrupts the control mode of the advanced temperature adjustment which may be performed to enter the defrosting mode.
In order to more clearly illustrate the present application, the working principle of the present application is further described below by taking the embodiments shown in fig. 1 to fig. 3 as examples:
starting the refrigerator, firstly judging whether the refrigerator reaches a defrosting mode, and if so, judging the evaporator temperature TrLess than a predetermined temperature Tr0Then, the defrosting mode is started.
If the defrosting condition is not met, judging the temperature period change value delta T in the cabinet1Whether the temperature is less than a preset temperature change threshold value delta T in the cabinetnIf Δ T1>ΔTnThe refrigerator works in a continuous temperature-pulling mode; if Δ T1≤ΔTnAnd the refrigerator works in a conventional control mode and further judges whether the door body is opened or not.
If the door body is opened, the refrigerator enters a first type advanced temperature regulation control mode, if the heat load during the door opening is higher than a preset temperature value, the overall temperature in the refrigerator can rise, and the refrigerating system can prolong the single-time operation refrigerating time or improve the operation frequency at the moment. In the process, whether the door body is closed or not can be continuously judged, and if the door body is always in an open state, the range of the prolonged single-operation refrigerating time is kept and the operation frequency is improved. When the opening time of the door body exceeds a preset time threshold value, increasing the amplitude for prolonging the single-operation refrigeration time and increasing the amplitude for increasing the operation frequency; when the door opening time is larger than the door opening time early warning value, the alarm gives an alarm, the control system judges that the refrigerator is not normally closed, an alarm indication is sent, and the alarm can be closed through the control system or door closing action.
When the door body enters the closed state from the open state, the temperature periodic variation rate V in the refrigerator is continuously detected by the second temperature detectorT1With a predetermined rate of change of temperature V in the cabinetTnWhether the first lead temperature regulation control mode is finished or not is judged, and when the temperature period change rate V in the cabinet is larger than the preset valueT1Greater than or equal to the preset temperature change rate V in the cabinetTnIf the refrigerating capacity of the refrigerating system is sufficient, the conventional temperature control mode can be recovered, and otherwise, the first advanced temperature regulation control mode is continuously executed to compensate the refrigerating capacity loss caused by opening the door. In other words,
if VT1﹤VTnThe period time for keeping the refrigeration running time of the compressor is prolonged or the running frequency of the compressor is increased;
if VT1≥VTnAnd the refrigerator exits the first type of advanced temperature regulation control mode and returns to the conventional control mode.
If the door body is always in a closed state, continuously judging n periods at the moment, and when the period change value delta T of the external temperature0Greater than the external preset temperature change threshold value Delta TmThe change of the external environment temperature is obvious, so that the refrigerator enters a second advanced adjusting mode; if the ambient temperature period variation value is delta T0Less than external preset temperature change threshold delta TmThe freezer operates in a conventional temperature control mode.
When the second advance regulation mode is entered,
when the outside temperature rises, if the refrigeration system is a fixed-frequency compressor, the single-operation refrigeration time is prolonged; if the refrigerating system is a variable frequency compressor, the refrigerating operation frequency is increased;
when the outside temperature is reduced, if the refrigeration system is a fixed-frequency compressor, the single-operation refrigeration time is reduced; and if the refrigerating system is a variable frequency compressor, reducing the refrigerating operation frequency.
The second type of advanced temperature regulation control mode further includes how to determine whether the second type of advanced temperature regulation control mode can be exited, specifically including,
judging the periodic variation rate V of the temperature in the cabinetT1With a predetermined rate of change of temperature V in the cabinetTnThe size of (2):
when V isT1≥VTnWhen the refrigerator exits the second type of advanced temperature regulation control mode, the conventional control mode is recovered;
when V isT1﹤VTnMeanwhile, the refrigerator keeps a second type of advanced temperature regulation control mode; when the second type of advanced temperature regulation control mode is still in, continuously judging:
periodic variation rate V of temperature of inner side of door bodyT2A first preset temperature change rate V between the inner side of the door body and the inner side of the door bodyTcThe size of (2):
when V isT2﹤VTcIn the time, the amplitude of prolonging the single-operation refrigerating time of the refrigerating system is kept unchanged;
when V isT2≥VTcWhen the refrigerating system is used, the amplitude of prolonging the single-operation refrigerating time is reduced;
in summary, the present invention detects the ambient temperature change, the door opening motion of the refrigerator and the door opening time, and performs predictive advanced adjustment on the refrigeration system. When the ambient temperature rises and the refrigerator is opened, the operation time of the refrigerating system is prolonged or the refrigerating operation frequency is increased, and the refrigerating capacity of the system is increased; when the ambient temperature is reduced, the operation time of the refrigeration system is shortened or the refrigeration operation frequency is reduced, and the refrigeration capacity of the system is reduced. Because the temperature response in the cabinet has hysteresis, the invention judges the effect of advanced adjustment according to the change rate of the temperature in the cabinet and changes the control mode. Based on the above content, the invention realizes the automatic control of instant response to the disturbance of the environmental temperature change and the door opening action, and reduces the temperature fluctuation of the products in the cabinet. The technical problem that the temperature fluctuation of the refrigerator in the prior art cannot be adjusted in time is solved.

Claims (6)

1. A temperature control method of a refrigerator is characterized in that,
the refrigerator comprises a control system, a cabinet body, a first temperature detector, a second temperature detector, a third temperature detector, a door opening detector, a first timer, a second timer and an alarm, wherein,
the cabinet body is provided with a door body and a compressor;
the first temperature detector is arranged outside the cabinet body, is electrically connected with the control system and is used for detecting the external environment temperature of the cabinet body; the second temperature detector is arranged in the cabinet body, is electrically connected with the control system and is used for detecting the temperature in the cabinet body; the third temperature detector is arranged in the cabinet body and close to one side of the door body, is electrically connected with the control system and is used for detecting the temperature close to the side of the door body; the door opening detector is arranged in the cabinet body, is electrically connected with the control system and is used for detecting the opening and closing of the door body;
the first timer is arranged in the cabinet body, is electrically connected with the control system and is used for recording the running and refrigerating time of the compressor; the second timer is arranged in the cabinet body, is electrically connected with the door opening detector and the control system and is used for recording the opening time of the door body; the alarm is arranged in the cabinet body and is electrically connected with the control system, and when the door opening time exceeds an early warning value, the alarm starts to give an alarm;
the temperature control method of the refrigerator comprises the following steps:
s1: the first temperature detector collects the outside temperature T0Periodic variation of ambient temperature by Δ T0(ii) a The second temperature detector collects the temperature T in the cabinet1Value of periodic variation of temperature Δ T in cabinet1(ii) a Third temperature detector collection deviceTemperature T near the inner side of door body2Value of cyclic variation of temperature Δ T near the inside of the door body2；
S2: acquiring the working state of a door body;
s3: when the door body is opened, the refrigerator works in a first type advanced temperature regulation control mode; the first type of advanced temperature regulation control mode comprises the following steps of continuously judging whether the door body is still in an open state in the regulation process of the first type of advanced temperature regulation control mode:
if so, acquiring the door opening time, and prolonging the single-time operation refrigeration time along with the prolonging of the door opening time; if not, judging the periodic variation rate V of the temperature in the cabinetT1With a predetermined rate of change of temperature V in the cabinetTnThe size of (2):
if VT1﹤VTnTo maintain an extension of the single run refrigeration time or to maintain an increased refrigeration run frequency; if VT1≥VTnThe refrigerator exits the first type of advanced temperature regulation control mode and returns to the conventional control mode;
when the door body is closed, the external temperature period change value delta T is judged0Temperature change threshold delta T preset with outsidemThe size of (d); if Δ T0≤ΔTmMeanwhile, the refrigerator works in a conventional control mode; if Δ T0>ΔTmThe refrigerator works in a second type advanced temperature regulation control mode; the second type of advanced temperature regulation control mode comprises the step of judging the periodic change rate V of the temperature in the cabinetT1With a preset temperature change rate V in the cabinetTnThe size of (c):
when V isT1≥VTnWhen the refrigerator exits the second type of advanced temperature regulation control mode, the conventional control mode is recovered; when V isT1﹤VTnIn the time, the refrigerator keeps a second type advanced temperature regulation control mode, and continues to judge the periodic change rate V of the temperature inside the door bodyT2A first preset temperature change rate V between the inner side of the door body and the inner side of the door bodyTcThe size of (2):
when V isT2﹤VTcDuring the operation, the amplitude of prolonging the single-time operation refrigeration time or increasing the refrigeration operation frequency of the refrigeration system is kept unchanged; when V isT2≥VTcIn time, the refrigeration system reduces the magnitude of extension of the single operation refrigeration time or the magnitude of increase of the refrigeration operation frequency.
2. The temperature control method of a refrigerator according to claim 1, further comprising, between the steps S1 and S2,
judging the temperature period change value delta T in the cabinet1With a preset temperature variation threshold delta T in the cabinetnThe size of (2):
if Δ T1>ΔTnThe refrigerator works in a continuous temperature-pulling mode;
if Δ T1≤ΔTnAnd the refrigerator is in a conventional control mode.
3. The temperature control method of the refrigerator according to claim 1 or 2, wherein the first advanced temperature adjustment control mode specifically comprises,
when the refrigerating system is a constant-frequency compressor, the single-running refrigerating time is prolonged; when the refrigerating system is a variable frequency compressor, the refrigerating operation frequency is improved.
4. The temperature control method of the refrigerator according to claim 3, wherein the first type of advanced temperature adjustment control mode further comprises,
and judging the size between the door opening time and the door opening time early warning value, and when the door opening time is greater than the door opening time early warning value, giving an alarm by using the alarm.
5. The temperature control method of the refrigerator according to claim 1 or 2, wherein the second type of advanced temperature adjustment control mode comprises the following steps:
when the outside temperature rises, if the refrigeration system is a fixed-frequency compressor, the single-operation refrigeration time is prolonged; if the refrigerating system is a variable frequency compressor, the refrigerating operation frequency is increased;
when the external temperature is reduced, if the refrigerating system is a constant-frequency compressor, the single-operation refrigerating time is reduced; and if the refrigerating system is a variable frequency compressor, reducing the refrigerating operation frequency.
6. The temperature control method of the refrigerator according to claim 1 or 2, further comprising a defrosting step, specifically comprising:
when the refrigerator operates for the total time tzGreater than a predetermined run time threshold taWhen, or when, the temperature T of the evaporatorrLess than a predetermined temperature Tr0When the refrigerator is in the defrosting mode, the refrigerator enters the defrosting mode;
when the refrigerator operates for the total time tzIs less than a preset running time threshold taWhen, or when, the temperature T of the evaporatorrGreater than a predetermined temperature Tr0In time, the freezer need not enter defrost mode.
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