CN113834277A - Temperature control method and device for refrigeration house and refrigeration equipment - Google Patents
Temperature control method and device for refrigeration house and refrigeration equipment Download PDFInfo
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- CN113834277A CN113834277A CN202111102074.2A CN202111102074A CN113834277A CN 113834277 A CN113834277 A CN 113834277A CN 202111102074 A CN202111102074 A CN 202111102074A CN 113834277 A CN113834277 A CN 113834277A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000010257 thawing Methods 0.000 claims description 58
- 238000005192 partition Methods 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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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
- F25D29/00—Arrangement or mounting of control or safety devices
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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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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Abstract
The invention discloses a temperature control method and device for a refrigeration house and refrigeration equipment. Wherein, the method comprises the following steps: detecting the temperature of the reservoir in real time; when the temperature of the refrigerator is higher than the preset starting temperature, all the refrigerating units in the refrigerator are kept in a full-open state; and when the temperature of the refrigerator is less than or equal to the preset starting temperature, controlling the refrigerating units to stop in sequence according to a preset sectional stop strategy until all the refrigerating units in the refrigerator are in a fully-closed state when the temperature of the refrigerator is reduced to the preset stop temperature. The invention controls the refrigeration units to stop in sections by actually measuring the temperature of the warehouse and setting temperature control parameters, and ensures the last refrigeration unit to stop when the temperature of the warehouse reaches the preset stop temperature, thereby avoiding the actually measured temperature of the warehouse being lower than the preset stop temperature and avoiding the large fluctuation of the temperature of the warehouse. The control accuracy of the temperature of the refrigerator is improved, and the quality of goods stored in the refrigerator is guaranteed.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a method and a device for controlling the temperature of a refrigeration house and refrigeration equipment.
Background
In order to ensure the cooling efficiency and the uniformity of the temperature in the refrigeration house, a plurality of sets of refrigerating units are often installed in the refrigeration house, so that the rapid cooling is ensured. However, the faster the cooling speed is, the more easily the control difficulty of the accuracy of the storage temperature in the cooling process is increased, which is particularly embodied in that after the set storage temperature shutdown value is reached, a plurality of sets of refrigerating units are simultaneously shutdown, but the storage temperature is still continuously reduced, and finally, the final result is that the storage temperature is often lower than the set storage temperature shutdown value after the refrigerating units are shutdown, so that the storage temperature cannot be effectively controlled at the proper temperature, the accuracy of the storage temperature control is reduced, and the quality of goods stored in the refrigeration storage can also be reduced.
The problem that the control scheme of freezer refrigerating unit can't effective accurate control storehouse temperature among the prior art, has not proposed effectual solution at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for controlling the temperature of a refrigeration house and refrigeration equipment, and aims to solve the problem that the control scheme of a refrigeration house refrigeration unit in the prior art cannot effectively and accurately control the temperature of the refrigeration house.
In order to solve the technical problem, the invention provides a temperature control method for a refrigeration house, wherein the method comprises the following steps: detecting the temperature of the reservoir in real time; when the temperature of the refrigerator is higher than the preset starting temperature, all the refrigerating units in the refrigerator are kept in a full-open state; and when the temperature of the refrigerator is less than or equal to the preset starting temperature, controlling the refrigerating units to stop in sequence according to a preset sectional stop strategy until all the refrigerating units in the refrigerator are in a fully-closed state when the temperature of the refrigerator is reduced to the preset stop temperature.
Further, before controlling the refrigeration unit to stop in sequence according to a preset sectional stop strategy, the method further comprises: and determining a plurality of temperature partitions between the preset starting temperature and the preset stopping temperature according to the preset starting temperature, the preset stopping temperature and the number of refrigerating units in the refrigeration house.
Further, according to the preset starting temperature, the preset stopping temperature and the number of the refrigerating units in the refrigeration house, determining a plurality of temperature partitions between the preset starting temperature and the preset stopping temperature, including: determining a temperature control parameter delta T' according to the preset starting temperature T1, the preset stopping temperature T2 and the number N of the refrigerating units in the refrigeration house; wherein the delta T' is not more than delta T/(N-1), and the delta T is T1-T2; and dividing the temperature range between the preset starting temperature and the preset stopping temperature into a plurality of temperature partitions according to the temperature control parameter delta T'.
Further, dividing the temperature range between the preset startup temperature and the preset shutdown temperature into a plurality of temperature partitions according to the temperature control parameter Δ T', including: if the Δ T' ═ Δ T/(N-1), averagely dividing the temperature range between the preset startup temperature T1 and the preset shutdown temperature T2 into N-1 temperature partitions; if DeltaT ' <DeltaT/(N-1), the temperature range between the preset shutdown temperature T2 and T2+ (N-2) DeltaT ' is divided into N-2 temperature partitions on average, and the temperature range between the preset startup temperature T1 and T2+ (N-2) DeltaT ' is taken as one temperature partition.
Further, according to the preset sectional shutdown strategy, the refrigerating unit is controlled to be sequentially shutdown, and the method comprises the following steps: when the temperature of the storage is reduced to a first temperature division from a preset starting temperature, controlling one or more refrigerating units to stop, and keeping the rest refrigerating units in a starting state; when the temperature of the storage is reduced from the first temperature subarea to the second temperature subarea, controlling one or more refrigerating units to stop, and keeping the rest refrigerating units in a starting state; in the same way, when the temperature of the storage is reduced to the last temperature division, one or more refrigerating units are controlled to stop, and at least one refrigerating unit is still in a starting state; and when the temperature of the refrigerator is reduced to a preset shutdown temperature, controlling all the refrigerating units in the refrigerator to be in a fully-closed state.
Further, the method further comprises: and when the refrigerating units are controlled to be stopped in sequence according to a preset sectional stop strategy, the refrigerating units meeting the preset defrosting condition are preferentially selected to be stopped.
Further, according to the preset sectional shutdown strategy, the refrigerating unit is controlled to be sequentially shutdown, and the method comprises the following steps: when the temperature of the storage is reduced to a first temperature division from a preset starting temperature, one or more refrigerating units meeting preset defrosting conditions are preferably shut down; wherein, the shut-down refrigerating unit is not allowed to enter a defrosting state; when the temperature of the storage is reduced from the first temperature subarea to the second temperature subarea, one or more refrigerating units meeting preset defrosting conditions are preferably shut down; wherein, the shut-down refrigerating unit can enter a defrosting state; in the same way, when the temperature of the storage is reduced to the last temperature division, one or more refrigerating units meeting the preset defrosting condition are preferably shut down, and at least one refrigerating unit is still in a starting state; wherein, the shut-down refrigerating unit can enter a defrosting state; and when the temperature of the refrigerator is reduced to a preset shutdown temperature, controlling all the refrigerating units in the refrigerator to be in a fully-closed state.
Further, preferably, after the one or more refrigeration units meeting the preset defrosting condition are shut down, the method further comprises the following steps: and after the defrosting state is finished, controlling the refrigerator to stop or start for refrigeration according to the temperature zone where the current refrigerator temperature is.
Further, after all the refrigeration units in the refrigerator are in the fully-off state when the temperature of the refrigerator is reduced to the preset shutdown temperature, the method further comprises the following steps: and if the temperature of the refrigerator is detected to rise again, controlling all the refrigerating units in the refrigerator to start for refrigeration when the temperature of the refrigerator rises again to exceed the preset starting temperature.
The invention also provides a temperature control device of the refrigeration house, wherein the device comprises: the temperature detection module is used for detecting the temperature of the warehouse in real time; the control module is used for keeping all the refrigerating units in the refrigerator in a fully-opened state when the temperature of the refrigerator is higher than the preset starting temperature; and when the temperature of the refrigerator is less than or equal to the preset starting temperature, controlling the refrigerating units to stop in sequence according to a preset sectional stop strategy until all the refrigerating units in the refrigerator are in a fully-closed state when the temperature of the refrigerator is reduced to the preset stop temperature.
The invention also provides refrigeration equipment, wherein the refrigeration equipment comprises the refrigeration house temperature control device.
The invention also provides a computer-readable storage medium, on which a computer program is stored, wherein the program, when executed by a processor, implements the method as described above.
By applying the technical scheme of the invention, the refrigerating units are controlled to be shut down in a segmented mode through the actually measured warehouse temperature and the set temperature control parameters, and the last refrigerating unit is ensured to be shut down when the warehouse temperature reaches the preset shutdown temperature, so that the actually measured warehouse temperature is prevented from being lower than the preset shutdown temperature, and the warehouse temperature is prevented from greatly fluctuating. The control accuracy of the temperature of the refrigerator is improved, and the quality of goods stored in the refrigerator is guaranteed.
Drawings
FIG. 1 is a flow chart of a method for controlling the temperature of a refrigerated storage according to an embodiment of the invention;
FIG. 2 is a first schematic diagram of a reservoir temperature control scheme according to an embodiment of the present invention;
FIG. 3 is a second schematic diagram of a reservoir temperature control scheme according to an embodiment of the present invention;
fig. 4 is a block diagram illustrating a construction of a refrigerator temperature control apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
Fig. 1 is a flowchart of a method for controlling the temperature of a refrigerator according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:
and step S101, detecting the temperature of the warehouse in real time. The detection of the storage temperature can be realized by temperature sensors installed in the refrigeration storage, for example, data of one temperature sensor is collected as the storage temperature, or data of a plurality of temperature sensors distributed at each position of the refrigeration storage is collected and averaged to be used as the storage temperature.
And S102, when the temperature of the refrigerator is higher than the preset starting temperature, all the refrigerating units in the refrigerator are kept in a full-on state. When the temperature of the refrigerator is higher, the storage effect of the stored articles in the refrigerator is not facilitated, so that all the refrigerating units need to be started for refrigeration, and the temperature is reduced at the highest speed.
And step S103, when the temperature of the refrigerator is less than or equal to the preset starting temperature, controlling the refrigerating units to be sequentially stopped according to a preset sectional stop strategy until all the refrigerating units in the refrigerator are in a fully-closed state when the temperature of the refrigerator is reduced to the preset stop temperature.
The refrigerating unit is controlled to be shut down in a segmented mode through actually measured warehouse temperature, and the last refrigerating unit is guaranteed to be shut down when the warehouse temperature reaches the preset shut-down temperature, so that the actually measured warehouse temperature is prevented from being lower than the preset shut-down temperature, and the warehouse temperature is prevented from being large in fluctuation. The control accuracy of the temperature of the refrigerator is improved, and the quality of goods stored in the refrigerator is guaranteed.
The segment shutdown strategy mentioned in this embodiment needs to be implemented by relying on multiple temperature partitions, that is, the segment shutdown strategy is implemented by relying on multiple temperature partitions. Therefore, before the sectional shutdown strategy is executed, a plurality of temperature partitions between the preset startup temperature and the preset shutdown temperature need to be determined according to the preset startup temperature, the preset shutdown temperature and the number of the refrigerating unit sets in the refrigeration house.
Specifically, a temperature control parameter delta T' can be determined according to a preset starting temperature T1, a preset stopping temperature T2 and the number N of refrigerating unit in the refrigeration house; wherein the delta T' is less than or equal to delta T/(N-1), and the delta T is T1-T2. And then, dividing the temperature range between the preset starting temperature and the preset stopping temperature into a plurality of temperature partitions according to the temperature control parameter delta T'. It should be noted that the number of the temperature partitions is not limited, and preferably, N-1 temperature partitions may be set, so that if a segmental shutdown strategy is adopted in which each temperature partition shuts down one refrigeration unit, it can be at least ensured that one refrigeration unit continues to refrigerate in the last temperature partition, and when the temperature of the refrigerator is reduced to a preset shutdown temperature, all refrigeration units in the refrigerator are in a fully-closed state.
If Δ T' ═ Δ T/(N-1), the temperature range between the preset startup temperature T1 and the preset shutdown temperature T2 is divided on average into N-1 temperature partitions. If DeltaT ' <DeltaT/(N-1), the temperature range between the preset shutdown temperature T2 and T2+ (N-2) DeltaT ' is divided into N-2 temperature partitions on average, and the temperature range between the preset startup temperature T1 and T2+ (N-2) DeltaT ' is taken as one temperature partition. Based on the scheme, the scheme of dividing the temperature zones according to the temperature control parameters is provided, so that the sectional shutdown strategy is further realized.
When the refrigeration units are controlled to be sequentially stopped according to a preset sectional stop strategy, when the temperature of a storage is reduced to a first temperature division range from a preset starting temperature, one or more refrigeration units are controlled to be stopped, and the rest refrigeration units are still in a starting state; when the temperature of the refrigerator is reduced from the first temperature partition to the second temperature partition, controlling one or more refrigerating units to stop, and keeping the rest refrigerating units in a starting state; in the same way, when the temperature of the storage is reduced to the last temperature division region, one or more refrigerating units are controlled to stop, and at least one refrigerating unit is still in a starting state; and when the temperature of the refrigerator is reduced to the preset shutdown temperature, controlling all the refrigerating units in the refrigerator to be in a full-closed state. Based on the sectional shutdown strategy, the falling speed of the temperature in the cold storage can be effectively controlled, and the temperature in the cold storage is ensured to be at the preset shutdown temperature, namely the suitable storage temperature of the articles stored in the cold storage when the last refrigerating unit is shutdown.
In the process of controlling the refrigerating units to stop in sequence according to the sectional stop strategy, for the stopped refrigeration, if the stopped refrigeration continues to reach the preset defrosting condition, the defrosting operation needs to be executed, and the unit defrosting can cause the storage temperature to rise obviously and influence the cooling speed. Therefore, the present embodiment provides a preferred implementation manner, that is, when the refrigeration units are controlled to stop in sequence according to a preset sectional stop strategy, the refrigeration units meeting the preset defrosting condition are preferentially selected to stop, so as to reduce the influence of unit defrosting on the storage temperature.
Specifically, when the temperature of the storage is reduced from the preset starting temperature to the first temperature division, one or more refrigerating units meeting the preset defrosting condition are preferably shut down; wherein, the shut-down refrigerating unit is not allowed to enter a defrosting state; when the temperature of the storage is reduced from the first temperature subarea to the second temperature subarea, one or more refrigerating units meeting the preset defrosting condition are preferably shut down; wherein, the shut-down refrigerating unit can enter a defrosting state; in the same way, when the temperature of the storage is reduced to the last temperature division, one or more refrigerating units meeting the preset defrosting condition are preferably shut down, and at least one refrigerating unit is still in a starting state; wherein, the refrigerating unit of shut down can enter into the state of defrosting. And when the temperature of the refrigerator is reduced to the preset shutdown temperature, controlling all the refrigerating units in the refrigerator to be in a full-closed state. It should be noted that, during each sectional shutdown, the number of the refrigeration units entering the defrosting state is preferably lower than that of the refrigeration units shutdown, so as to avoid a large influence on the cooling speed. After the defrosting state of the refrigerating unit is finished, the refrigerating unit can be controlled to stop or start for refrigeration according to the temperature zone where the current storage temperature is.
According to the sectional shutdown strategy introduced above, when the temperature of the refrigerator is reduced to the preset shutdown temperature, all the refrigerating units in the refrigerator are in a fully-closed state, and then if the temperature of the refrigerator is detected to rise again, all the refrigerating units in the refrigerator are controlled to be started for refrigeration when the temperature of the refrigerator rises again to exceed the preset startup temperature. And then the temperature of the storage is reduced, and the refrigerating units are controlled to be stopped in sequence according to a preset sectional stop strategy.
Example 2
The present embodiment will describe the technical solution of the present application in detail with reference to the accompanying drawings.
In order to ensure good cooling effect and uniformity of temperature in the refrigerator, a plurality of sets of refrigerating units are usually installed in a large-sized refrigerator. If N sets of refrigeration units are installed in the refrigerator, the preset starting temperature is T1 (the specific numerical value can be set), and the preset stopping temperature is T2 (the specific numerical value can be set), the control range delta T of the refrigerator is T1-T2. In practical application, a user can set T1 and T2 according to practical application of the refrigeration house, so that the temperature of the refrigeration house fluctuates between T1 and T2, and the storage effect and quality of goods stored in the refrigeration house are guaranteed. The precise temperature control parameters are DeltaT' (optional) and DeltaT ≦ DeltaT/(N-1) to ensure that the reservoir temperature control zone (temperature partition) can be divided into N-1 zones between T1 and T2.
Fig. 2 is a first schematic diagram of a storage temperature control scheme according to an embodiment of the present invention, wherein all the refrigeration unit units in the refrigerator are maintained in a fully-on state (N-off) when the storage temperature is higher than T1, as shown in fig. 2. And when the temperature of the refrigerator is less than or equal to the preset starting temperature, controlling the refrigerating unit to stop in sequence according to a preset sectional stop strategy. In particular, the amount of the solvent to be used,
when the temperature of the refrigerator is reduced to the temperature range from T1 to T2+ (N-2) delta T', 1 refrigerating unit is closed, the unit meeting the defrosting condition is closed preferentially, N-1 refrigerating unit is opened, and at the moment, the refrigerating unit is not allowed to defrost.
When the temperature of the storage is reduced to the temperature division of T2+ (N-2) delta T 'to T2+ (N-3) delta T', 1 refrigerating unit is closed, the unit meeting the defrosting condition is preferentially closed, N-2 refrigerating units are opened, and at the moment, 1 refrigerating unit is allowed to defrost.
By analogy, when the temperature of the refrigerator is reduced to the temperature division of T2+2 delta T 'to T2+ delta T', the N-2 refrigerating units are turned off, the units meeting the defrosting condition are preferentially turned off, the 2 refrigerating units are turned on, and at the moment, the N-3 refrigerating units are allowed to defrost.
When the temperature of the refrigerator is reduced to the temperature range from T2 +. DELTA.T' to T2, the N-1 refrigerating units are turned off, the unit meeting the defrosting condition is preferentially turned off, the 1 refrigerating unit is turned on, and at the moment, the N-2 refrigerating units are allowed to defrost.
When the storage temperature is reduced to be lower than T2, all refrigerating units are closed (N refrigerating units are closed), and the defrosting of the N-1 refrigerating units is allowed.
The value of the delta T 'depends on whether the temperature partition is divided evenly or not, if the delta T' is delta T/(N-1), the storage temperature control range is evenly distributed into N-1 parts, when the actually measured storage temperature T is less than or equal to T1, the machine is stopped in sequence, and when the T is less than or equal to T2, all the N refrigerating units are stopped. If delta T ' <deltaT/(N-1), the control range of the storage temperature is only equally divided in the interval from T2 to T2+ (N-2) delta T ', and the interval from T2+ (N-2) delta T ' to T1 only allows one refrigerating unit to be closed for ensuring the refrigerating effect. The compartment temperature between T2+ (N-2) Δ T' and T1 is relatively high, so it is not advisable to shut down too many chiller units.
The refrigerator unit leads to the storehouse temperature to drop too fast when shutting down, may lead to the actual storehouse temperature to shut down at being far below T2, leads to storehouse temperature control accuracy to reduce, may reduce the quality of the storage goods in the freezer, consequently adopts the mode of segmentation shut down in the cooling process, specifically as the second schematic diagram of the storehouse temperature control scheme shown in fig. 3, the segmentation shutdown strategy in the storehouse temperature drops in-process is as follows:
when the storage temperature T is more than T1, the refrigerating unit is fully opened. At the moment, the heat load in the cold storage is large, and the temperature in the cold storage is too high, so that full refrigeration and rapid cooling are needed.
The storage temperature is reduced to: t2+ (N-2) delta T' < T ≤ T1, and N-1 refrigerators are turned on and 1 refrigerator is turned off. At this time, the actual temperature in the refrigeration house is reduced to the range controlled by the temperature, so that the refrigeration units can be closed in sequence, but the temperature of the refrigeration house is still higher, so that only one refrigeration unit is closed, and the speed of reducing the temperature of the refrigeration house is reduced. If the refrigerating units meet the defrosting condition in the interval, 1 refrigerating unit meeting the defrosting condition is shut down preferentially, and meanwhile, in order to guarantee the cooling speed, the refrigerating units are not allowed to enter the defrosting mode.
The storage temperature is reduced to: t2+ (N-1) delta T '< T ≤ T2+ (N-2) delta T', and N-2 refrigeration units are turned on and 2 refrigeration units are turned off. At this time, the temperature of the storage is low, and therefore, the refrigeration unit needs to be shut down quickly to prevent the temperature of the storage from decreasing too fast. If the refrigerating units meet the defrosting condition in the interval, closing the 2 refrigerating units meeting the defrosting condition preferentially; and meanwhile, the temperature of the storage is reduced to a lower level, 1 refrigerating unit meeting the defrosting condition is allowed to be defrosted, and the refrigerating unit is refrigerated or closed according to the section where the current storage temperature is located after defrosting is finished.
… … and so on;
the storage temperature is reduced to: t is more than or equal to T2 and less than T2 and 2 delta T', 2 refrigerating units are started, and N-2 refrigerating units are closed. At this point the actual reservoir temperature has gradually approached T2 and the refrigeration unit is gradually shut down. If the refrigerating units meet the defrosting condition in the interval, preferentially closing N-2 refrigerating units meeting the defrosting condition; and simultaneously allowing the N-3 refrigerating units meeting the defrosting condition to enter defrosting, and after defrosting is finished, refrigerating or closing according to the section where the current storage temperature is located.
The storage temperature is reduced to: t is more than or equal to T2 and less than T2+ delta T', 1 refrigerating unit is started, and N-1 refrigerating units are closed. The difference between the actual warehouse temperature and the shutdown value is very small, the refrigerating units are gradually closed, and only one refrigerating unit is reserved for refrigerating and cooling. If the refrigerating units meet the defrosting condition in the interval, preferentially closing N-1 refrigerating units meeting the defrosting condition; and simultaneously allowing the N-2 refrigerating units meeting the defrosting condition to enter defrosting, and after defrosting is finished, refrigerating or closing according to the section where the current storage temperature is located.
The storage temperature is reduced to: t is less than or equal to T2, and the refrigerating unit is completely closed. And when the actual storage temperature reaches the shutdown value, all the refrigerating units are closed. All refrigeration units in the interval are closed; and simultaneously allowing the N-1 refrigerating units meeting the defrosting condition to enter defrosting, and after defrosting is finished, refrigerating or closing according to the section where the current storage temperature is located.
The reservoir temperature is increased in the defrosting process, and the control strategy in the temperature increasing process is as follows:
and when T is less than or equal to T1, the refrigerating unit is completely closed. Namely, the refrigerating unit is completely closed when the preset starting value is not reached.
When T is more than T1, the refrigerating unit is fully opened. Namely, after the preset starting value is reached, the refrigerating unit is fully opened, the temperature of the refrigeration house begins to drop at the moment, and a sectional shutdown strategy in the process of dropping the temperature of the refrigeration house is executed.
The condition that the warehouse temperature continues to decline after the refrigeration unit is shut down is effectively avoided through the sectional shutdown strategy to this embodiment, ensures that the temperature is undulant in setting for the interval in the freezer, and to the control of the number of the unit of defrosting in every temperature subregion, the warehouse temperature that leads to of effectively avoiding many refrigeration units defrosting to rise more simultaneously.
Example 3
Corresponding to the method for controlling the temperature of the refrigeration storage with the use effect of the unit introduced in fig. 1, the present embodiment provides a refrigeration storage temperature control device, as shown in the structural block diagram of the refrigeration storage temperature control device shown in fig. 4, the device includes:
the temperature detection module 10 is used for detecting the temperature of the warehouse in real time;
the control module 20 is connected to the temperature detection module 10 and is used for keeping all the refrigerating units in the refrigerator in a fully-opened state when the temperature of the refrigerator is higher than a preset starting temperature; and when the temperature of the refrigerator is less than or equal to the preset starting temperature, controlling the refrigerating units to stop in sequence according to a preset sectional stop strategy until all the refrigerating units in the refrigerator are in a fully-closed state when the temperature of the refrigerator is reduced to the preset stop temperature.
The refrigerating unit is controlled to be shut down in a segmented mode through actually measured warehouse temperature, and the last refrigerating unit is guaranteed to be shut down when the warehouse temperature reaches the preset shut-down temperature, so that the actually measured warehouse temperature is prevented from being lower than the preset shut-down temperature, and the warehouse temperature is prevented from being large in fluctuation. The control accuracy of the temperature of the refrigerator is improved, and the quality of goods stored in the refrigerator is guaranteed.
For a specific segment shutdown strategy, the above embodiments are described in detail, and are not described herein again.
The embodiment also provides a refrigeration device, wherein the refrigeration device comprises the refrigeration house temperature control device.
Example 4
The embodiment of the present invention provides software for implementing the technical solutions described in the above embodiments and preferred embodiments.
The embodiment of the invention provides a nonvolatile computer storage medium, wherein a computer executable instruction is stored in the computer storage medium and can execute a refrigeration house temperature control method in any method embodiment.
The storage medium stores the software, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.
The product can execute the method provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. A method for controlling the temperature of a refrigeration storage, the method comprising:
detecting the temperature of the reservoir in real time;
when the temperature of the refrigerator is higher than the preset starting temperature, all the refrigerating units in the refrigerator are kept in a full-open state;
and when the temperature of the refrigerator is less than or equal to the preset starting temperature, controlling the refrigerating units to stop in sequence according to a preset sectional stop strategy until all the refrigerating units in the refrigerator are in a fully-closed state when the temperature of the refrigerator is reduced to the preset stop temperature.
2. The method of claim 1, wherein prior to controlling the refrigeration unit to sequentially shut down in accordance with a predetermined staging strategy, the method further comprises:
and determining a plurality of temperature partitions between the preset starting temperature and the preset stopping temperature according to the preset starting temperature, the preset stopping temperature and the number of refrigerating units in the refrigeration house.
3. The method of claim 2, wherein determining a plurality of temperature partitions between the preset startup temperature and the preset shutdown temperature based on the preset startup temperature, the preset shutdown temperature, and a number of refrigeration units in the refrigeration storage comprises:
determining a temperature control parameter delta T' according to the preset starting temperature T1, the preset stopping temperature T2 and the number N of the refrigerating units in the refrigeration house; wherein the delta T' is not more than delta T/(N-1), and the delta T is T1-T2;
and dividing the temperature range between the preset starting temperature and the preset stopping temperature into a plurality of temperature partitions according to the temperature control parameter delta T'.
4. The method according to claim 3, wherein dividing the temperature range between the preset startup temperature and the preset shutdown temperature into a plurality of temperature partitions according to the temperature control parameter Δ T' comprises:
if the Δ T' ═ Δ T/(N-1), averagely dividing the temperature range between the preset startup temperature T1 and the preset shutdown temperature T2 into N-1 temperature partitions;
if DeltaT ' <DeltaT/(N-1), the temperature range between the preset shutdown temperature T2 and T2+ (N-2) DeltaT ' is divided into N-2 temperature partitions on average, and the temperature range between the preset startup temperature T1 and T2+ (N-2) DeltaT ' is taken as one temperature partition.
5. The method as set forth in claim 2 wherein controlling the refrigeration unit to shutdown in sequence in accordance with a predetermined staging shutdown strategy comprises:
when the temperature of the storage is reduced to a first temperature division from a preset starting temperature, controlling one or more refrigerating units to stop, and keeping the rest refrigerating units in a starting state;
when the temperature of the storage is reduced from the first temperature subarea to the second temperature subarea, controlling one or more refrigerating units to stop, and keeping the rest refrigerating units in a starting state;
in the same way, when the temperature of the storage is reduced to the last temperature division, one or more refrigerating units are controlled to stop, and at least one refrigerating unit is still in a starting state;
and when the temperature of the refrigerator is reduced to a preset shutdown temperature, controlling all the refrigerating units in the refrigerator to be in a fully-closed state.
6. The method according to any one of claims 1 to 5, further comprising:
and when the refrigerating units are controlled to be stopped in sequence according to a preset sectional stop strategy, the refrigerating units meeting the preset defrosting condition are preferentially selected to be stopped.
7. The method as set forth in claim 6 wherein controlling the refrigeration unit to shutdown in sequence in accordance with a predetermined staging shutdown strategy comprises:
when the temperature of the storage is reduced to a first temperature division from a preset starting temperature, one or more refrigerating units meeting preset defrosting conditions are preferably shut down; wherein, the shut-down refrigerating unit is not allowed to enter a defrosting state;
when the temperature of the storage is reduced from the first temperature subarea to the second temperature subarea, one or more refrigerating units meeting preset defrosting conditions are preferably shut down; wherein, the shut-down refrigerating unit can enter a defrosting state;
in the same way, when the temperature of the storage is reduced to the last temperature division, one or more refrigerating units meeting the preset defrosting condition are preferably shut down, and at least one refrigerating unit is still in a starting state; wherein, the shut-down refrigerating unit can enter a defrosting state;
and when the temperature of the refrigerator is reduced to a preset shutdown temperature, controlling all the refrigerating units in the refrigerator to be in a fully-closed state.
8. The method of claim 7, wherein preferably after shutdown of one or more refrigeration units meeting preset defrost conditions, the method further comprises:
and after the defrosting state is finished, controlling the refrigerator to stop or start for refrigeration according to the temperature zone where the current refrigerator temperature is.
9. The method of claim 1, wherein after all of the refrigeration units in the cold store are in a fully-off state when the store temperature falls to a preset shutdown temperature, the method further comprises:
and if the temperature of the refrigerator is detected to rise again, controlling all the refrigerating units in the refrigerator to start for refrigeration when the temperature of the refrigerator rises again to exceed the preset starting temperature.
10. A temperature control device for a refrigeration storage, the device comprising:
the temperature detection module is used for detecting the temperature of the warehouse in real time;
the control module is used for keeping all the refrigerating units in the refrigerator in a fully-opened state when the temperature of the refrigerator is higher than the preset starting temperature; and when the temperature of the refrigerator is less than or equal to the preset starting temperature, controlling the refrigerating units to stop in sequence according to a preset sectional stop strategy until all the refrigerating units in the refrigerator are in a fully-closed state when the temperature of the refrigerator is reduced to the preset stop temperature.
11. A refrigeration apparatus, characterized in that the refrigeration apparatus comprises the freezer temperature control device according to claim 10.
12. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1 to 9.
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| CN202111102074.2A CN113834277B (en) | 2021-09-18 | 2021-09-18 | Temperature control method and device for refrigeration house and refrigeration equipment |
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| CN202111102074.2A CN113834277B (en) | 2021-09-18 | 2021-09-18 | Temperature control method and device for refrigeration house and refrigeration equipment |
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| JPH1038396A (en) * | 1996-07-26 | 1998-02-13 | Hitachi Ltd | Method of controlling freezer |
| WO2001022008A1 (en) * | 1999-09-24 | 2001-03-29 | Sanyo Electric Co., Ltd. | Multi-stage compression refrigerating device |
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| CN210941997U (en) * | 2019-10-21 | 2020-07-07 | 安徽智锐汽车有限公司 | Freezing car carriage of subregion |
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| JPH1038396A (en) * | 1996-07-26 | 1998-02-13 | Hitachi Ltd | Method of controlling freezer |
| WO2001022008A1 (en) * | 1999-09-24 | 2001-03-29 | Sanyo Electric Co., Ltd. | Multi-stage compression refrigerating device |
| US20130220589A1 (en) * | 2010-02-18 | 2013-08-29 | Mingsheng Liu | Optimizer for multiple staged refrigeration systems |
| JP2012101235A (en) * | 2010-11-08 | 2012-05-31 | Jfe Steel Corp | Apparatus and method for controlling cooling stop temperature |
| CN106839638A (en) * | 2016-11-01 | 2017-06-13 | 珠海格力电器股份有限公司 | Combined refrigeration control method and device for refrigeration storage and refrigeration storage engineering system |
| CN210941997U (en) * | 2019-10-21 | 2020-07-07 | 安徽智锐汽车有限公司 | Freezing car carriage of subregion |
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| CN113834277B (en) | 2022-10-14 |
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