CN113865218A - Method for adjusting precooling time before defrosting, refrigeration equipment and storage medium - Google Patents
Method for adjusting precooling time before defrosting, refrigeration equipment and storage medium Download PDFInfo
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- CN113865218A CN113865218A CN202111290249.7A CN202111290249A CN113865218A CN 113865218 A CN113865218 A CN 113865218A CN 202111290249 A CN202111290249 A CN 202111290249A CN 113865218 A CN113865218 A CN 113865218A
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- defrosting
- cooling time
- adjusting
- time before
- precooling
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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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
Abstract
The invention discloses a method for adjusting precooling time before defrosting, refrigeration equipment and a storage medium. The method for adjusting the precooling time before defrosting comprises the following steps: acquiring a first maximum temperature of a load during defrosting and during a recovery period after defrosting, and a second maximum temperature of the load during N compressor start-stop periods before each precooling period, wherein N is greater than or equal to 3; calculating a difference between the first maximum temperature minus the second maximum temperature; and adjusting the precooling time before defrosting according to the difference value and the initial value of the precooling time before defrosting, and updating the initial value of the cooling time before next defrosting into the precooling time before defrosting. The precooling time before defrosting is intelligently adjusted according to the condition, thereby avoiding aggravating the defrosting condition and increasing unnecessary energy consumption.
Description
Technical Field
The invention relates to the technical field of defrosting, in particular to a method for adjusting the cooling time before defrosting.
Background
In the existing refrigeration equipment, during defrosting control, refrigeration temperature can rise to a certain extent due to the fact that refrigeration is not carried out for a long time in a defrosting period. Taking a refrigerator as an example, during defrosting, the refrigerator has a certain temperature rise inside the refrigerator, and the storage of food is affected by the excessive temperature rise, so that a refrigeration device for refrigerating the refrigerator needs a pre-cooling stage before defrosting.
The pre-cooling time before defrosting is generally the time from the time when the refrigerator meets the defrosting condition to the time when defrosting starts, and the time is generally a fixed pre-cooling time before defrosting preset through experiments or a pre-cooling shutdown temperature before defrosting, and the intelligentization degree of the mode of fixing the pre-cooling time is lower. But also may exacerbate evaporator frosting and may increase energy consumption.
Disclosure of Invention
In order to solve the technical problem of aggravation of frosting or increase of energy consumption caused by fixed pre-defrosting pre-cooling time in the prior art, the invention provides a pre-defrosting pre-cooling time adjusting method, refrigeration equipment and a storage medium.
The method for adjusting the precooling time before defrosting provided by the invention comprises the following steps:
acquiring a first maximum temperature of a load during defrosting and during a recovery period after defrosting, and a second maximum temperature of the load during N compressor start-stop periods before each precooling period, wherein N is greater than or equal to 3;
calculating a difference between the first maximum temperature minus the second maximum temperature;
and adjusting the precooling time before defrosting according to the difference value and the initial value of the precooling time before defrosting, and updating the initial value of the cooling time before next defrosting into the precooling time before defrosting.
Further, adjusting the pre-defrosting pre-cooling time according to the difference comprises: when the difference is larger than or equal to a first preset value, the pre-defrosting pre-cooling time t1 is calculated according to a formula t1= t0+ x, wherein t0 is an initial value of the pre-defrosting pre-cooling time, and x is an adjustment value larger than 0.
Further, adjusting the pre-defrosting pre-cooling time according to the difference comprises: and when the difference value is smaller than a second preset value, if the initial value t0 of the pre-defrosting pre-cooling time is larger than the adjustment value x, calculating the pre-defrosting pre-cooling time t1 according to a formula t1= t 0-x.
Further, the precooling time before defrosting neatly according to the difference value further comprises: when the difference value is smaller than a second preset value, if the initial value t0 of the pre-defrosting pre-cooling time is smaller than or equal to the adjustment value x, the pre-defrosting pre-cooling time t1 is calculated according to a formula t1= t 0.
Further, adjusting the pre-defrosting pre-cooling time according to the difference comprises: when the difference value is smaller than a first preset value and larger than or equal to a second preset value, the pre-defrosting pre-cooling time t1 is calculated according to a formula t1= t 0.
Further, the initial value of the precooling time before defrosting is a preset value.
Further, the precooling time before defrosting of the refrigeration equipment before the first defrosting period after power-on is an initial value of the precooling time before defrosting.
The refrigeration equipment provided by the invention comprises a controller, wherein the controller controls the precooling time before defrosting of the refrigeration equipment according to the method for adjusting the precooling time before defrosting of the refrigeration equipment in the technical scheme.
Further, the refrigeration apparatus includes a refrigerator.
Further, the first maximum temperature and the second maximum temperature are obtained from a maximum temperature of the freezing chamber sensor and a correspondence between a temperature detected by the freezing chamber sensor and a temperature of a load in the freezing chamber of the refrigerator.
The computer-readable storage medium provided by the present invention is used for storing a computer program, and when the computer program runs, the method for adjusting the pre-defrosting pre-cooling time according to the above technical solution is executed.
According to the invention, the temperature difference is monitored, and the initial value is adjusted according to the temperature difference on the basis of the initial value of the precooling time before defrosting, so that the precooling time before defrosting meets the temperature rise limitation during defrosting and recovery periods, excessive refrigeration before defrosting is reduced, and energy consumption is reduced.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
FIG. 1 is a flow chart of an adjustment process according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Thus, a feature indicated in this specification will serve to explain one of the features of one embodiment of the invention, and does not imply that every embodiment of the invention must have the stated feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.
According to the method for adjusting the pre-cooling time before defrosting, the pre-cooling time before defrosting is determined according to the temperature rise condition, and the phenomenon that the pre-cooling time before defrosting is too long or too short is avoided.
The present invention requires acquiring a first maximum temperature of the load during defrosting and during recovery after defrosting, and a second maximum temperature of the load during N compressor on-off periods before entering the precooling period each time, where N is equal to or greater than 3. In a preferred embodiment, N is greater than or equal to 5.
When the precooling time before defrosting needs to be adjusted every time, the difference value of subtracting the second maximum temperature from the first maximum temperature is calculated, the precooling time before defrosting is adjusted according to the difference value and the initial value of the precooling time before defrosting, and the initial value of the time before defrosting is updated to the precooling time before defrosting, so that the precooling time before defrosting is more intelligent, energy is saved effectively, and the condition of defrosting is avoided from being aggravated.
Specifically, the pre-defrosting pre-cooling time is adjusted according to the difference value to be divided into three conditions, the three conditions are all based on an initial value, namely the initial value of the pre-defrosting pre-cooling time, the initial value of the pre-defrosting pre-cooling time can be a value obtained according to experimental data or a value set by a user, and in a preferred embodiment, the initial value of the pre-defrosting pre-cooling time is a value preset by the user.
The first condition is that if the obtained difference value is larger than or equal to a first preset value, the temperature rise condition is serious, the precooling time t1 before defrosting is calculated according to a formula t1= t0+ x, t0 is an initial value of the precooling time before defrosting, and x is an adjustment value larger than 0. And a certain time is added on the basis of the initial value of the precooling time before defrosting, so that the duration of the precooling time before defrosting is properly prolonged, and the overlarge temperature fluctuation after defrosting is avoided.
And if the obtained difference is smaller than a second preset value, the temperature rise condition is not serious, at this time, whether the initial value t0 of the precooling time before defrosting is larger than the adjustment value x is judged, and if the initial value t0 of the precooling time before defrosting is larger than the adjustment value x, the precooling time t1 before defrosting is calculated according to a formula t1= t0-x, so that the precooling time before defrosting is properly reduced, and the defrosting condition is prevented from being aggravated. If the initial value t0 of the pre-defrosting pre-cooling time is judged to be less than or equal to the adjustment value x, the fact that the initial value of the pre-defrosting pre-cooling time obtained through experiments is not a very long time can be shown, and the defrosting condition can not be aggravated is shown, so that the pre-defrosting pre-cooling time t1 is calculated according to a formula t1= t 0.
And in the third case, when the obtained difference value is smaller than the first preset value and is larger than or equal to the second preset value, the temperature rise is not high or low, and at the moment, the precooling time t1 before defrosting is calculated according to a formula t1= t 0.
Before the first defrosting period after the refrigeration equipment is powered on, the first maximum temperature and the second maximum temperature cannot be obtained, so that the precooling time before defrosting of the refrigeration equipment before the first defrosting period after the refrigeration equipment is powered on is the initial value of the precooling time before defrosting.
The invention also protects the refrigeration equipment, and the refrigeration equipment comprises a controller which controls the precooling time before defrosting of the refrigeration equipment according to the method for adjusting the precooling time before defrosting of the technical scheme. The refrigeration equipment referred to in the present invention includes, but is not limited to, a refrigerator. When the refrigeration equipment is a refrigerator, the first maximum temperature and the second maximum temperature are obtained through the maximum temperature of the freezing chamber sensor and the corresponding relation between the temperature detected by the freezing chamber sensor and the temperature in the freezing chamber of the refrigerator.
Because the refrigerator does not refrigerate for a long time during defrosting, the refrigerator has a certain temperature rise condition, and the storage of food is influenced by the excessive temperature rise, so the refrigerator needs to be precooled before defrosting. A specific embodiment of the present invention will be described below by taking a refrigerator as an example.
The precooling time before defrosting is preset as an initial value t0 of the precooling time before defrosting.
The refrigerator runs a defrosting and recovery period with an initial value T0 of the chilling time before defrosting, and the temperature difference T is calculatedDefrosting and warming upT1-T2, T1 being the maximum temperature of the freezer compartment sensor during defrost and during recovery after defrost, T2 being the maximum temperature of the freezer compartment sensor entering the "pre-defrost pre-chill period" first 5 compressor on-off cycles.
When the temperature difference TDefrosting and warming upAnd when the defrosting time is more than or equal to the first preset value, the pre-cooling time t1= t0+1h before defrosting.
When the second preset value is less than or equal to the temperature difference TDefrosting and warming upIf the preset value is less than the first preset value, the precooling time before defrosting is t1= t 0.
When the temperature difference TDefrosting and warming upIf the initial value is less than the second preset value, judging whether the initial value t0 of the precooling time before defrosting is greater than 1 h; if yes, precooling time t1= t0-1h before defrosting; if not, precooling time t1= t0 before defrosting.
The initial value of the precooling time before defrosting for the next defrosting t0= t1, and the steps are repeated.
Because the temperature change detected by the freezing chamber sensor and the actual temperature change of the freezing chamber load have certain difference, the temperature detected by the freezing chamber temperature sensor and the indoor maximum temperature also need to be obtained through experiments
The defrosting control also needs to obtain the corresponding relation between the temperature detected by the freezing chamber sensor and the temperature in the freezing chamber of the refrigerator, so that the actual temperature rise of the load of the freezing chamber is fed back as far as possible under the temperature rise condition detected by the freezing chamber sensor. Specifically, a test scheme can be formulated and obtained through experimental data. The variable of the test scheme is the environment temperature and the refrigerator volume, the refrigerator with different volumes is used for testing under the same environment working condition, the temperature of a freezing chamber temperature sensor of the refrigerator is monitored, load packages with thermocouples are placed at the places (5-7) with the highest possible temperature of the freezing chamber, the temperature rise curve of the freezing sensor in the defrosting and recovery period and the temperature rise curve of the thermocouples of the load packages are observed, and the maximum temperature rises of the freezing sensor and the load packages are recorded.
And under different environment temperature working conditions, monitoring the temperature of a freezing chamber temperature sensor of the refrigerator in the same way in a fixed refrigerator, placing load bags with thermocouples at the places (5-7) with the highest possible temperature of the freezing chamber, observing the temperature rise curve of the freezing sensor and the temperature rise curve of the load bags in the defrosting and recovery periods, and recording the maximum temperature rises of the freezing sensor and the load bags.
And fitting a temperature rise corresponding curve by taking the temperature rise of the freezing chamber temperature sensor as an abscissa and the temperature rise of the load bag with the largest freezing chamber temperature rise as an ordinate to obtain the corresponding relation between the temperature rise detected by the freezing chamber temperature sensor and the actual temperature rise of the freezing chamber load.
The invention adjusts the precooling time before defrosting by detecting the temperature rise condition of the freezing chamber, so that the precooling time meets the temperature rise limitation during defrosting and recovery periods and reduces excessive refrigeration before defrosting.
The invention also protects a computer readable storage medium, and a computer program stored in the computer readable storage medium executes the method for adjusting the pre-defrosting pre-cooling time in the technical scheme when running.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. A method for adjusting precooling time before defrosting is characterized by comprising the following steps:
acquiring a first maximum temperature of a load during defrosting and during a recovery period after defrosting, and a second maximum temperature of the load during N compressor start-stop periods before each precooling period, wherein N is greater than or equal to 3;
calculating a difference between the first maximum temperature minus the second maximum temperature;
and adjusting the precooling time before defrosting according to the difference value and the initial value of the precooling time before defrosting, and updating the initial value of the cooling time before next defrosting into the precooling time before defrosting.
2. The method for adjusting the pre-defrosting pre-cooling time according to claim 1, wherein the adjusting the pre-defrosting pre-cooling time according to the magnitude of the difference comprises: when the difference is larger than or equal to a first preset value, the pre-defrosting pre-cooling time t1 is calculated according to a formula t1= t0+ x, wherein t0 is an initial value of the pre-defrosting pre-cooling time, and x is an adjustment value larger than 0.
3. The method for adjusting the pre-defrosting pre-cooling time according to claim 1, wherein the adjusting the pre-defrosting pre-cooling time according to the magnitude of the difference comprises: and when the difference value is smaller than a second preset value, if the initial value t0 of the pre-defrosting pre-cooling time is larger than the adjustment value x, calculating the pre-defrosting pre-cooling time t1 according to a formula t1= t 0-x.
4. The method for adjusting pre-cooling time before defrosting according to claim 3, wherein the trimming pre-cooling time before defrosting according to the difference further comprises: when the difference value is smaller than a second preset value, if the initial value t0 of the pre-defrosting pre-cooling time is smaller than or equal to the adjustment value x, the pre-defrosting pre-cooling time t1 is calculated according to a formula t1= t 0.
5. The method for adjusting the pre-defrosting pre-cooling time according to claim 1, wherein the adjusting the pre-defrosting pre-cooling time according to the magnitude of the difference comprises: when the difference value is smaller than a first preset value and larger than or equal to a second preset value, the pre-defrosting pre-cooling time t1 is calculated according to a formula t1= t 0.
6. The method for adjusting pre-defrosting pre-cooling time according to any one of claims 2 to 5, wherein the initial value of the pre-defrosting pre-cooling time is a preset value.
7. The method for adjusting pre-defrosting pre-cooling time according to any one of claims 2 to 5, wherein the pre-defrosting pre-cooling time before the first defrosting period after the refrigeration equipment is powered on is an initial value of the pre-defrosting pre-cooling time.
8. A refrigeration apparatus comprising a controller, wherein the controller controls the pre-defrosting pre-cooling time of the refrigeration apparatus according to the method for adjusting the pre-defrosting pre-cooling time of any one of claims 1 to 7.
9. The refrigeration appliance according to claim 8 wherein said refrigeration appliance comprises a refrigerator.
10. The refrigerating apparatus as claimed in claim 9, wherein the first and second maximum temperatures of the load are obtained by a maximum temperature of the freezing compartment sensor and a correspondence between a temperature detected by the freezing compartment sensor and a temperature of the load in the freezing compartment of the refrigerator.
11. A computer-readable storage medium storing a computer program, wherein the computer program is operable to perform the method of adjusting pre-defrost pre-cooling time of any one of claims 1 to 7.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777371A (en) * | 2022-04-08 | 2022-07-22 | 海信（山东）冰箱有限公司 | Refrigerator and noise reduction method thereof |
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| JPH01137185A (en) * | 1987-11-25 | 1989-05-30 | Toshiba Corp | Refrigerator |
| JPH02126083A (en) * | 1988-11-07 | 1990-05-15 | Matsushita Refrig Co Ltd | Refrigerator |
| JPH0593567A (en) * | 1991-10-01 | 1993-04-16 | Matsushita Refrig Co Ltd | Control device for refrigerator and freezer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114777371A (en) * | 2022-04-08 | 2022-07-22 | 海信（山东）冰箱有限公司 | Refrigerator and noise reduction method thereof |
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| CN113865218B (en) | 2022-06-10 |
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