CN111156766A - Temperature control method for air-cooled refrigerator - Google Patents

Temperature control method for air-cooled refrigerator Download PDF

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Publication number
CN111156766A
CN111156766A CN202010144445.2A CN202010144445A CN111156766A CN 111156766 A CN111156766 A CN 111156766A CN 202010144445 A CN202010144445 A CN 202010144445A CN 111156766 A CN111156766 A CN 111156766A
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CN
China
Prior art keywords
temperature
air
cooled refrigerator
time
compartment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010144445.2A
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Chinese (zh)
Inventor
任立人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Yuanlong Appliances Co ltd
Original Assignee
Jiangsu Yuanlong Appliances Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Yuanlong Appliances Co ltd filed Critical Jiangsu Yuanlong Appliances Co ltd
Priority to CN202010144445.2A priority Critical patent/CN111156766A/en
Publication of CN111156766A publication Critical patent/CN111156766A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042Air treating means within refrigerated spaces
    • F25D17/045Air flow control arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D19/00Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infra-red detectors
    • F25D19/003Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infra-red detectors with respect to movable containers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00Arrangement or mounting of control or safety devices
    • F25D29/003Arrangement or mounting of control or safety devices for movable devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00Arrangement or mounting of control or safety devices
    • F25D29/005Mounting of control devices

Abstract

The invention relates to a temperature control method for an air-cooled refrigerator, which comprises the following steps: determining a boot temperature TonAnd shutdown temperature ToffAnd the closing time t of the damperoff(ii) a Step two: opening an air door to refrigerate the compartment; step three: real-time temperature T of detection chamberaIf T isa≤TmidEntering the fourth step, otherwise returning to the second step; step four: closing the air door and stopping refrigerating the compartment; step five: the closing time of the air door reaches toffAnd then returning to the step two. The invention relates to a method for controlling the power-off time t according to the set temperature of each compartment of an air-cooled refrigeratoroffSo as to narrow the fluctuation range of the actual instantaneous temperature of the chamberAnd the constant temperature effect is realized.

Description

Temperature control method for air-cooled refrigerator
Technical Field
The invention belongs to the technical field of temperature regulation of air-cooled refrigerators, and particularly relates to a temperature control method for an air-cooled refrigerator.
Background
With the continuous development of social economy, the living standard of people is also improved, the requirements of people on the air-cooled refrigerator are higher and higher, and the requirement on the precision of the temperature regulation of the air-cooled refrigerator is higher and higher. At present, the air-cooled refrigerator generally adopts a control method of absolute air door switch through temperature value of a sensor, although the method can enable the average temperature of a compartment to reach a set temperature, the accuracy of the sensor is limited, the actual instantaneous temperature fluctuation range is large, and the storage and fresh-keeping effects on food are poor.
Disclosure of Invention
The invention aims to provide a temperature control method for an air-cooled refrigerator, which aims to solve the problem of large actual instantaneous temperature fluctuation range in the air-cooled refrigerator.
The temperature control method for the air-cooled refrigerator is realized as follows:
a temperature control method for air-cooled refrigerator is characterized by that according to the set temperature of every chamber of air-cooled refrigerator it utilizes the control of shutdown time toffAnd the actual starting temperature is adjusted, so that the fluctuation range of the actual instantaneous temperature of the chamber is narrowed, and the constant temperature effect is realized.
Further, the temperature control method comprises the following specific steps:
the method comprises the following steps: determining a boot temperature TonAnd shutdown temperature ToffAnd the closing time t of the damperoff
Step two: opening an air door to refrigerate the compartment;
step three: real-time temperature T of detection chamberaIf T isa≤TmidEntering the fourth step, otherwise returning to the second step;
step four: closing the air door and stopping refrigerating the compartment;
step five: the closing time of the air door reaches toffAnd then returning to the step two.
Further, the starting temperature TonAnd shutdown temperature ToffAccording to the set temperature of the refrigerator.
Further, the actual temperature in the compartment is from the shutdown temperature ToffBack to the starting temperature TonTime of (d) is t;
and under the condition that the load of the same type of air-cooled refrigerator is fixed, the time t is determined by the ambient temperature of the air-cooled refrigerator.
Further, toff<t。
Further, said TmidThe calculation method comprises the following steps:
after the technical scheme is adopted, the invention has the beneficial effects that:
according to the invention, through setting the closing time and adjusting the opening time of the air door of the compartment, the actual instantaneous temperature in the compartment is maintained in the original actual instantaneous temperature range, and simultaneously fluctuates only above the set temperature, so that the fluctuation range of the instantaneous temperature of the compartment is reduced, the stability of the temperature in the air-cooled refrigerator is ensured, the constant temperature effect is achieved, and the food preservation effect is improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a flow chart of the temperature control method for an air-cooled refrigerator according to the present invention;
FIG. 2 is a graph showing the temperature and time profiles of the air-cooled refrigerator in example 1;
wherein, 1-the actual instantaneous temperature fluctuation range of the fresh-keeping chamber of the existing refrigerator, and 2-the actual instantaneous temperature fluctuation range of the fresh-keeping chamber of the refrigerator after the invention is adopted.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The air-cooled refrigerator applying the temperature control method disclosed by the invention comprises a plurality of compartments, each compartment is provided with at least one air door, and cold air is sent to the compartment through the air door to achieve the refrigeration effect. At least one evaporator is arranged in the air-cooled refrigerator, each evaporator is provided with a fan, and each compartment of the air-cooled refrigerator is refrigerated through an air path system.
At least one temperature sensor is arranged in each compartment of the air-cooled refrigerator and used for detecting the temperature change in each compartment in real time.
A temperature control method for air-cooled refrigerator is characterized by that according to the set temperature of every chamber of air-cooled refrigerator it utilizes the control of shutdown time toffAnd the actual starting temperature is adjusted, so that the fluctuation range of the actual instantaneous temperature of the chamber is narrowed, and the constant temperature effect is realized.
Specifically, the temperature control method comprises the following specific steps:
the method comprises the following steps: determining a boot temperature TonAnd shutdown temperature ToffAnd the closing time t of the damperoff
Specifically, the set temperature of the compartment to be regulated is T, and the actual instantaneous temperature in the compartment fluctuates within a range and cannot be maintained at the set temperature T in real time, wherein the shutdown temperature ToffI.e. the lower limit of the actual temperature range, the start-up temperature TonThe temperature is detected by a temperature sensor in the compartment at the upper limit of the actual temperature range, and the minimum temperature change T detected by the temperature sensor is reduced to reduce the fluctuation range of the actual instantaneous temperatureiCan be taken as the temperature difference between the actual temperature and the set temperature, i.e. Toff=T-Ti,Ton=T+TiThe minimum temperature variation detected by the temperature sensor is the detection accuracy, so TiThe detection accuracy of the temperature sensor.
The temperature sensor used in the present invention is a sensor with an accuracy of 1 ℃, i.e., Ti ═ 1 ℃.
Specifically, the temperature sensor may be selected from, but not limited to, DKST1329GW manufactured by dekun sensors, ltd.
In the invention, the temperature sensors of the compartments assist in the operation of the system by means of the shutdown temperature ToffAnd openThe machine temperature Ton is obtained to obtain the shutdown temperature T of the air-cooled refrigeratoroffBack to the starting temperature TonAnd the closing time t of the air door is obtained through the time toff
The time t is determined by the ambient temperature of the air-cooled refrigerator, and the corresponding relation between the specific ambient temperature range and the time t is as follows:
TABLE 1
Wherein, toff<t。
Step two: opening an air door to refrigerate the compartment;
and under the condition of opening the air door, the fan is also in a starting state, so that the compartment of the air door can be conveniently opened for refrigeration.
Step three: real-time temperature T of detection chamberaThere are two cases:
(1) when T isa>TmidIf so, returning to the step two, and continuously refrigerating the compartment;
(2) when T isa≤TmidEntering the step four;
the T ismidThe calculation method comprises the following steps:
step four: closing the air door and stopping refrigerating the compartment;
step five: the closing time of the air door reaches toffAnd then returning to the step two.
Example 1
The air-cooled refrigerator provided by the embodiment is a single-system air-cooled frostless refrigerator with a zero-degree fresh-keeping chamber, and each chamber of the air-cooled refrigerator is controlled by a single air door. The air-cooled refrigerator runs at the ambient temperature of 32 ℃, the load is 70%, the temperature of the zero-degree fresh-keeping chamber of the air-cooled refrigerator is controlled, the set temperature of the fresh-keeping chamber is 0 ℃, and the temperature in the fresh-keeping chamber is sensedThe detection precision Ti of the device is 1 ℃, so the starting temperature T isonAt 1 ℃ and a shutdown temperature ToffIs-1 ℃.
Equation of lawAvailable Tmin=0℃。
Obtaining the internal temperature of the engine at each environmental temperature through testingoffIs raised to-1 ℃ to the starting temperature TonThe time t is 1 deg.C, as shown in the table below, and the closing time t of the fresh food compartment damper is selected in this exampleoff1/4 at time t.
TABLE 2
Since the air-cooled refrigerator is at an ambient temperature of 32 ℃, the closing time t is shown in table 2 aboveoff=540s。
Opening an air door of the fresh-keeping chamber to refrigerate the fresh-keeping chamber;
detecting real-time temperature T of fresh-keeping chamberaWhen T isaAnd when the temperature is less than or equal to 0 ℃, closing the air door 540s and stopping refrigerating the fresh-keeping chamber.
After 540s of closing, the air door of the fresh-keeping chamber is opened again, the fresh-keeping chamber is cooled again, and the real-time temperature T of the fresh-keeping chamber is detectedaAnd according to TaAnd (4) closing the air door of the fresh-keeping chamber, and circulating in this way.
The actual test results are as follows:
4 high-precision thermocouples are uniformly arranged in the fresh-keeping chamber.
When the temperature of the fresh-keeping chamber is not controlled by the method, the average temperature of 4 thermocouples is-0.2 ℃, the maximum temperature is 3.8 ℃, the minimum temperature is-2.4 ℃, and the temperature difference is 6.2 ℃.
After the temperature of the fresh-keeping chamber is controlled by adopting the method, the average temperature of the 4 thermocouples is 0.1 ℃, the highest temperature is 0.8 ℃, the lowest temperature is-0.9 ℃, and the temperature difference is 1.7 ℃.
Example 2
The air-cooled refrigerator provided by the embodiment is a single-system air-cooled frostless refrigerating and freezing box, and the refrigerating chamber of the air-cooled refrigerator is controlled by adopting an independent air door. The air-cooled refrigerator runs at an ambient temperature of 22 ℃, the load is 70%, in the embodiment, the refrigerating chamber of the air-cooled refrigerator is subjected to temperature control, so that the set temperature of the refrigerating chamber is 4 ℃, and the detection precision Ti of a temperature sensor in the refrigerating chamber is 1 ℃, so that the starting temperature T is highonAt 5 ℃ and a shutdown temperature ToffIs 3 ℃.
Equation of lawAvailable Tmin=4℃。
When the load of the fresh-keeping chamber is 70%, the internal temperature of the fresh-keeping chamber is obtained to be the shutdown temperature T under each environmental temperatureoffIs raised to the starting temperature T at 3 DEG ConThe time t is 5 ℃, as shown in the table below, and the closing time t of the air door of the refrigerating chamber is selected in the embodimentoff1/3 at time t.
TABLE 3
Since the air-cooled refrigerator is at an ambient temperature of 22 ℃, the closing time t is shown in table 2 aboveoff=900s。
Opening an air door of the fresh-keeping chamber to refrigerate the fresh-keeping chamber;
detecting real-time temperature T of fresh-keeping chamberaWhen T isaWhen the temperature is less than or equal to 4 ℃, the air door is closed for 900s, and the refrigeration of the fresh-keeping chamber is stopped.
After closing for 900s, the air door of the fresh-keeping chamber is opened again, the fresh-keeping chamber is refrigerated again, and the real-time temperature T of the fresh-keeping chamber is detectedaAnd according to TaAnd (4) closing the air door of the fresh-keeping chamber, and circulating in this way.
The actual test results are as follows:
3 high-precision thermocouples are uniformly arranged in the refrigerating chamber.
When the temperature of the fresh-keeping chamber is not controlled by the method, the average temperature of the 3 thermocouples is 3.6 ℃, the maximum temperature is 8.4 ℃, the minimum temperature is 1.9 ℃, and the temperature difference is 6.5 ℃.
After the temperature of the fresh-keeping chamber is controlled by adopting the method, the average temperature of the 3 thermocouples is 4.2 ℃, the highest temperature is 5.6 ℃, the lowest temperature is 2.8 ℃ and the temperature difference is 2.8 ℃.
Therefore, the invention reduces the shutdown time t on the basis of the time toffAnd will turn on the temperature TonIs arranged at TmidThe value department can effectively reduce the fluctuation range of the actual instantaneous temperature in the compartment, so that the actual instantaneous temperature is closer to the set temperature, the constant temperature effect is increased, and the food preservation effect is improved. And correspondingly, the shutdown time toffThe smaller the ratio to the time t, the smaller the fluctuation range of the actual instantaneous temperature.
The temperature control method provided by the invention is based on comparison under the condition that the same type of air-cooled refrigerator has the same load in the refrigerator, namely under the condition that the same type of refrigerator has the same load, the temperature control method can effectively reduce the fluctuation range of the actual instantaneous temperature, so that the temperature is closer to the set temperature, and the constant temperature effect is achieved.
In addition, the structure of the air-cooled refrigerator, that is, the thickness and the load of the internal foam layer, both affect the time t, that is, the greater the load is, the shorter the time t is when the foam layer thickness is the same and the ambient temperature is the same, and similarly, the greater the foam layer thickness is, the longer the time t is when the load is the same and the ambient temperature is the same.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (6)

1. A temperature control method for an air-cooled refrigerator is characterized in thatAccording to the set temperature of each compartment of the air-cooled refrigerator, the shutdown time t is determinedoffAnd the actual starting temperature is adjusted, so that the fluctuation range of the actual instantaneous temperature of the chamber is narrowed, and the constant temperature effect is realized.
2. The temperature control method for the air-cooled refrigerator according to claim 1, which comprises the following steps:
the method comprises the following steps: determining a boot temperature TonAnd shutdown temperature ToffAnd the closing time t of the damperoff
Step two: opening an air door to refrigerate the compartment;
step three: real-time temperature T of detection chamberaIf T isa≤TmidEntering the fourth step, otherwise returning to the second step;
step four: closing the air door and stopping refrigerating the compartment;
step five: the closing time of the air door reaches toffAnd then returning to the step two.
3. The temperature control method for the air-cooled refrigerator according to claim 2, wherein the starting temperature T isonAnd shutdown temperature ToffAccording to the set temperature of the refrigerator.
4. The temperature control method for an air-cooled refrigerator according to claim 2, wherein the actual temperature in the compartment is from a shutdown temperature ToffBack to the starting temperature TonTime of (d) is t;
and under the condition that the load of the same type of air-cooled refrigerator is fixed, the time t is determined by the ambient temperature of the air-cooled refrigerator.
5. The temperature control method for air-cooled refrigerator according to claim 4, wherein t is toff<t。
6. The temperature for air-cooled refrigerator according to claim 2Control method, characterized in that said TmidThe calculation method comprises the following steps:
CN202010144445.2A 2020-03-04 2020-03-04 Temperature control method for air-cooled refrigerator Pending CN111156766A (en)

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Application Number Priority Date Filing Date Title
CN202010144445.2A CN111156766A (en) 2020-03-04 2020-03-04 Temperature control method for air-cooled refrigerator

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Publication Number Publication Date
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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104677048A (en) * 2015-03-19 2015-06-03 合肥美菱股份有限公司 Air capacity control method for refrigerating compartment of refrigerator and refrigerator
CN105509409A (en) * 2015-12-22 2016-04-20 青岛海尔股份有限公司 Control method and device of electronic air door
CN205784218U (en) * 2016-07-15 2016-12-07 合肥美菱股份有限公司 The control system of a kind of many air door wind-cooling refrigerators and refrigerator
CN106482423A (en) * 2015-09-02 2017-03-08 Lg电子株式会社 The control method of refrigerator
CN106595180A (en) * 2016-12-13 2017-04-26 青岛海尔股份有限公司 Air supply control method and device of air-cooled refrigerator
CN106918184A (en) * 2017-03-17 2017-07-04 合肥美的电冰箱有限公司 A kind of control method for air door of wind cooling refrigerator, system and wind cooling refrigerator
CN109237858A (en) * 2018-08-23 2019-01-18 Tcl家用电器(合肥)有限公司 Refrigerator swing flap control method, swing flap device and swing flap refrigerator
CN109798719A (en) * 2017-11-16 2019-05-24 合肥华凌股份有限公司 The control method and control device and equipment of damper assemblies
CN109798721A (en) * 2017-11-16 2019-05-24 合肥华凌股份有限公司 The control method and control device and equipment of damper assemblies
CN110470099A (en) * 2019-08-13 2019-11-19 南京创维家用电器有限公司 A kind of control method of machinery air door variable-frequency electric brain refrigerator
CN110822805A (en) * 2019-10-11 2020-02-21 珠海格力电器股份有限公司 Refrigerator quick-freezing storage control method and refrigerator

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104677048A (en) * 2015-03-19 2015-06-03 合肥美菱股份有限公司 Air capacity control method for refrigerating compartment of refrigerator and refrigerator
CN106482423A (en) * 2015-09-02 2017-03-08 Lg电子株式会社 The control method of refrigerator
CN105509409A (en) * 2015-12-22 2016-04-20 青岛海尔股份有限公司 Control method and device of electronic air door
CN205784218U (en) * 2016-07-15 2016-12-07 合肥美菱股份有限公司 The control system of a kind of many air door wind-cooling refrigerators and refrigerator
CN106595180A (en) * 2016-12-13 2017-04-26 青岛海尔股份有限公司 Air supply control method and device of air-cooled refrigerator
CN106918184A (en) * 2017-03-17 2017-07-04 合肥美的电冰箱有限公司 A kind of control method for air door of wind cooling refrigerator, system and wind cooling refrigerator
CN109798719A (en) * 2017-11-16 2019-05-24 合肥华凌股份有限公司 The control method and control device and equipment of damper assemblies
CN109798721A (en) * 2017-11-16 2019-05-24 合肥华凌股份有限公司 The control method and control device and equipment of damper assemblies
CN109237858A (en) * 2018-08-23 2019-01-18 Tcl家用电器(合肥)有限公司 Refrigerator swing flap control method, swing flap device and swing flap refrigerator
CN110470099A (en) * 2019-08-13 2019-11-19 南京创维家用电器有限公司 A kind of control method of machinery air door variable-frequency electric brain refrigerator
CN110822805A (en) * 2019-10-11 2020-02-21 珠海格力电器股份有限公司 Refrigerator quick-freezing storage control method and refrigerator

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