CN112797707A - Defrosting control method and device and air cooler unit - Google Patents
Defrosting control method and device and air cooler unit Download PDFInfo
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- CN112797707A CN112797707A CN202011639517.7A CN202011639517A CN112797707A CN 112797707 A CN112797707 A CN 112797707A CN 202011639517 A CN202011639517 A CN 202011639517A CN 112797707 A CN112797707 A CN 112797707A
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- 238000010257 thawing Methods 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 339
- 238000004590 computer program Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000004044 response Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/008—Defroster control by timer
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
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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
- F25D2600/02—Timing
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses a defrosting control method and device and an air cooler unit. Wherein, the method comprises the following steps: acquiring the surface temperature of the evaporator and the temperature of the area where the second heating device is located; controlling the opening and closing of the first heating device according to the surface temperature of the evaporator; after the first heating device is started for a preset time, the second heating device is controlled to be opened and closed according to the temperature of the area where the second heating device is located, wherein the second heating device is arranged in a heating blind area of the first heating device. According to the invention, the defrosting blind zone can be eliminated, the problem of residual frost blocks is avoided, the operation reliability of the air cooler unit is improved, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of units, in particular to a defrosting control method and device and an air cooler unit.
Background
When current air cooler unit control defrosting heating pipe defrosting, when detecting that unit defrosting temperature sensing package is less than the settlement temperature, the unit needs to defrost, outer quick-witted fan stops, when being higher than the settlement temperature, the unit stops defrosting, the fan gets into refrigeration mode or shut down the mode, general freezer needs personnel to frequently get into the freezer and gets related food and deliver, service environment is harsher, the remaining condition of defrosting usually exists, especially the cold junction of heating pipe, because it is less to generate heat, lead to being close to cold junction corner frost piece and remain, long time, it stops up the fan at last to have the frost piece grow, lead to the unit to move unusually, influence the use of freezer.
Aiming at the problem that in the prior art, a heating device has a heating blind area to cause frost cake residue, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a defrosting control method and device and an air cooler unit, and aims to solve the problem that in the prior art, a heating device has a heating blind area, so that frost blocks are left.
In order to solve the technical problem, the invention provides a defrosting control method, which is applied to an air cooler unit, wherein the air cooler unit comprises an evaporator, a first heating device and a second heating device, the second heating device is arranged in a heating blind area of the first heating device, and the first heating device and the second heating device are used for defrosting, and the method comprises the following steps:
acquiring the surface temperature of the evaporator and the temperature of the area where the second heating device is located;
controlling the opening and closing of the first heating device according to the surface temperature of the evaporator;
and after the first heating device is started for a preset time, controlling the second heating device to be opened and closed according to the temperature of the area where the second heating device is located.
Further, controlling the opening and closing of the first heating means according to the evaporator surface temperature includes:
judging whether the surface temperature of the evaporator is less than a first threshold value or not;
if yes, controlling the first heating device to be started;
and if not, controlling the first heating device to keep off.
Further, after controlling the first heating device to be turned on, the method further includes:
judging whether the surface temperature of the evaporator is greater than a second threshold value or not; wherein the second threshold is greater than the first threshold;
if yes, controlling the first heating device to be closed;
and if not, controlling the first heating device to be kept started.
Further, after the first heating device is started for a preset time, the opening and closing of the second heating device is controlled according to the temperature of the area where the second heating device is located, and the method comprises the following steps:
judging whether the temperature of the area where the second heating device is located is smaller than a third threshold value;
if yes, controlling the second heating device to be started;
and if not, controlling the second heating device to keep off.
Further, after controlling the second heating device to be turned on, the method further includes:
judging whether the temperature of the area where the second heating device is located is larger than a fourth threshold value or not; wherein the fourth threshold is greater than the third threshold;
if yes, controlling the second heating device to be closed;
and if not, controlling the second heating device to be kept started.
Further, the method further comprises:
acquiring the accumulated running time of the compressor;
and controlling the opening and closing of the second heating device according to the accumulated running time and the temperature of the area where the second heating device is located.
Further, controlling the opening and closing of the second heating device according to the accumulated operating time and the temperature of the area where the second heating device is located includes:
judging whether the difference value between the accumulated operation time length and the set operation time length is smaller than a preset value and whether the temperature of the area where the second heating device is located is smaller than a fifth threshold value simultaneously; wherein the fifth threshold is less than a third threshold;
if so, controlling the second heating device to be started, and controlling the second heating device to be stopped until the temperature of the area where the second heating device is located is greater than a fourth threshold value;
and if not, controlling the second heating device to keep off.
Further, after controlling the opening and closing of the second heating device according to the accumulated operating time and the temperature of the area where the second heating device is located, the method further includes:
and controlling the opening and closing of the first heating device according to the accumulated running time and the surface temperature of the evaporator.
Further, controlling the opening and closing of the first heating means according to the accumulated operating time period and the evaporator surface temperature includes:
judging whether the accumulated operation time length is equal to the set operation time length and the surface temperature of the evaporator is smaller than a sixth threshold value, wherein the sixth threshold value is smaller than the first threshold value;
if so, controlling the first heating device to be started, and controlling the first heating device to be stopped until the surface temperature of the evaporator is greater than a second threshold value;
and if not, controlling the first heating device to keep off.
The invention also provides a defrosting control device, which is used for realizing the defrosting control method and comprises the following steps:
the temperature acquisition module is used for acquiring the surface temperature of the evaporator and the temperature of the area where the second heating device is located;
the first control module is used for controlling the opening and closing of the first heating device according to the surface temperature of the evaporator;
and the second control module is used for controlling the opening and closing of the second heating device according to the temperature of the area where the second heating device is located after the first heating device is started for the preset time.
Further, the obtaining module comprises:
the first temperature sensor is arranged on the evaporator and used for acquiring the surface temperature of the evaporator;
and the second temperature sensor is arranged in the area where the second heating device is located and used for acquiring the temperature of the area where the second heating device is located.
The invention also provides an air cooler unit, which comprises the defrosting control device and also comprises: first heating device and second heating device, first heating device sets up first heating device's heating blind area, first heating device with the second heating device is used for the defrosting.
Further, the power of the second heating means is smaller than the power of the first heating means.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described defrosting control method.
By applying the technical scheme of the invention, the surface temperature of the evaporator and the temperature of the area where the second heating device is located are obtained; controlling the opening and closing of the first heating device according to the surface temperature of the evaporator; and after the first heating device is started for a preset time, controlling the opening and closing of a second heating device arranged in a heating blind area of the first heating device according to the temperature of an area where the second heating device is located. The defrosting blind area can be eliminated, the problem of frost block residue is avoided, the reliability of operation of the air cooler unit is improved, and the user experience is improved.
Drawings
FIG. 1 is a block diagram of an air cooler assembly according to an embodiment of the present invention;
FIG. 2 is a bottom view of an air cooler assembly according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating the arrangement position of the second temperature sensor 102 according to the embodiment of the present invention;
FIG. 4 is a flow chart of a defrosting control method according to an embodiment of the present invention;
FIG. 5 is a block diagram of a defrosting control unit according to an embodiment of the present invention;
fig. 6 is a structural view of a defrosting 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.
It should be understood that although the terms first, second, third, etc. may be used to describe the thresholds in embodiments of the present invention, the thresholds should not be limited to these terms. These terms are only used to distinguish between different temperature thresholds. For example, the first threshold may also be referred to as a second threshold, and similarly, the second threshold may also be referred to as a first threshold, without departing from the scope of embodiments of the present invention.
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
The embodiment provides a defrosting control method, which is applied to an air cooler unit, and fig. 1 is a structural diagram of the air cooler unit according to the embodiment of the present invention, as shown in fig. 1, the air cooler unit includes an evaporator 1, a first heating device 2, and a second heating device 3, and the evaporator 1 is provided with a first temperature sensor 101.
Fig. 2 is a bottom view of the air cooler unit according to the embodiment of the present invention, and as shown in fig. 2, the second heating device is disposed in a heating blind area of the first heating device, and the first heating device and the second heating device are used for defrosting, for example, the first heating device is a heating tube, one side of the heating tube without a resistance wire has a longer cold end, and the cold end is a heating blind area of the first heating device, which is a location where frosting easily occurs.
Fig. 3 is a schematic diagram of the location of the second temperature sensor 102 according to the embodiment of the present invention, as shown in fig. 2, the second temperature sensor 102 is located in the area of the second heating device, and the temperature detected by the second temperature sensor 102 is used to represent the temperature of the area of the second heating device.
Fig. 4 is a flowchart of a defrosting control method according to an embodiment of the present invention, as shown in fig. 4, the defrosting control method includes:
s101, acquiring the surface temperature of the evaporator and the temperature of the area where the second heating device is located.
In a specific implementation process, the surface temperature of the evaporator is obtained through the first temperature sensor, and the temperature of the area where the second heating device is located is obtained through the second temperature sensor.
And S102, controlling the opening and closing of the first heating device according to the surface temperature of the evaporator.
The surface temperature of the evaporator can represent the frosting condition of the evaporator, if the surface temperature of the evaporator is relatively low, the frosting on the surface of the evaporator is indicated, and the defrosting is needed, and if the surface temperature of the evaporator is relatively high, the frosting on the surface of the evaporator is not indicated, and the defrosting is not needed. Therefore, the opening and closing of the first heating device are controlled according to the surface temperature of the evaporator, and whether defrosting operation is performed or not is controlled.
And S103, after the first heating device is started for a preset time, controlling the second heating device to be opened and closed according to the temperature of the area where the second heating device is located.
After first heating device opened the preset time, under normal conditions, the region that the second heating device was located is first heating device's blind area, therefore, its temperature does not have too big change, consequently if this region frosts, will not be dissolved, but, also probably this region does not frosted, does not need to change the frost, consequently, after first heating device opened the preset time, whether need to change the frost to this region according to the temperature determination in second heating device place region, control the switching of second heating device promptly.
In the defrosting control method of the embodiment, the surface temperature of the evaporator and the temperature of the area where the second heating device is located are obtained; controlling the opening and closing of the first heating device according to the surface temperature of the evaporator; and after the first heating device is started for a preset time, controlling the opening and closing of a second heating device arranged in a heating blind area of the first heating device according to the temperature of an area where the second heating device is located. The defrosting blind area can be eliminated, the problem of frost block residue is avoided, the reliability of operation of the air cooler unit is improved, and the user experience is improved.
Example 2
In this embodiment, in order to accurately control the timing of opening and closing the first heating device, the step S102 specifically includes: judging whether the surface temperature of the evaporator is less than a first threshold value or not; if yes, indicating that the evaporator needs defrosting, and controlling the first heating device to be started; if not, indicating that the evaporator does not need defrosting, and controlling the first heating device to be kept closed.
After controlling first heating device, begin to change white, after the frost is accomplished, the surface temperature of evaporimeter can rise, need not to continue to change white again this moment, can control the air-cooler and resume normal operating, consequently, control after first heating device opens, above-mentioned method still includes: judging whether the surface temperature of the evaporator is greater than a second threshold value, wherein the second threshold value is greater than the first threshold value; if yes, indicating that the defrosting is finished, controlling the first heating device to be closed, and stopping defrosting; if not, indicating that the defrosting is not finished, controlling the first heating device to be kept on, and continuing defrosting.
Similarly, in order to accurately control the timing of opening and closing the second heating device, the step S103 specifically includes: judging whether the temperature of the area where the second heating device is located is smaller than a third threshold value; if yes, indicating that the area where the second heating device is located needs defrosting, and controlling the second heating device to be started; if not, the second heating device is controlled to be kept closed, and the fact that the area where the second heating device is located does not need defrosting is indicated.
After controlling the second heating device, the defrosting is started, after the defrosting is completed, the temperature of the area where the second heating device is located can rise, and at this time, the defrosting does not need to be continued, so that after the second heating device is controlled to be started, the method further comprises the following steps: judging whether the temperature of the area where the second heating device is located is larger than a fourth threshold value; wherein the fourth threshold is greater than the third threshold; if yes, indicating that the defrosting is finished, and controlling the second heating device to be closed; if not, indicating that the defrosting is not finished, and controlling the second heating device to be kept on.
In the above step, whether defrosting is performed is judged according to the temperature, and in other embodiments of the present invention, whether defrosting is performed may be judged according to a combination of an operation time and a temperature of the compressor, and therefore, the method may further include: acquiring the accumulated running time of the compressor; and controlling the opening and closing of the second heating device according to the accumulated running time and the temperature of the area where the second heating device is located.
Specifically, controlling the opening and closing of the second heating device according to the accumulated operating time and the temperature of the area where the second heating device is located includes: judging whether the difference value between the accumulated operation time length and the set operation time length is smaller than a preset value and whether the temperature of the area where the second heating device is located is smaller than a fifth threshold value simultaneously; because the defrosting operation is carried out frequently according to the accumulated running time, the starting condition is looser, and the fifth threshold is smaller than the third threshold; if so, controlling the second heating device to be started, and controlling the second heating device to be stopped until the temperature of the area where the second heating device is located is greater than a fourth threshold value; if not, the second heating device is controlled to be kept closed. Through the steps, the second heating device can be started in advance to pre-defrost, and the overall defrosting efficiency is improved.
After defrosting in advance by starting the second heating device, if the accumulated operation time reaches the set operation time, the whole evaporator indicates that defrosting is needed, and then only starting the second heating device cannot solve the problem of frosting in other areas, so after controlling the opening and closing of the second heating device according to the accumulated operation time and the temperature of the area where the second heating device is located, the method further comprises the following steps: and controlling the opening and closing of the first heating device according to the accumulated running time and the surface temperature of the evaporator. The method specifically comprises the following steps: judging whether the accumulated running time is equal to the set running time and whether the surface temperature of the evaporator is smaller than a sixth threshold is simultaneously satisfied, wherein the starting condition is looser because the defrosting operation is more frequent according to the accumulated running time, and therefore, the sixth threshold is smaller than the first threshold; if yes, controlling the first heating device to be started for defrosting, and controlling the first heating device to be stopped for defrosting after the surface temperature of the evaporator is greater than a second threshold value; if not, the first heating device is controlled to be kept closed.
Example 3
The present embodiment provides a defrosting control device for implementing the above defrosting control method, and fig. 5 is a structural diagram of the defrosting control device according to the embodiment of the present invention, as shown in fig. 5, the defrosting control device includes:
and the temperature acquisition module 10 is used for acquiring the surface temperature of the evaporator and the temperature of the area where the second heating device is located. Wherein, the temperature acquisition module 10 includes: a first temperature sensor 101, which is arranged on the evaporator and is used for acquiring the surface temperature of the evaporator; and the second temperature sensor 102 is arranged in the area where the second heating device is located, and is used for acquiring the temperature of the area where the second heating device is located.
A first control module 20 for controlling the opening and closing of the first heating means according to the evaporator surface temperature. The surface temperature of the evaporator can represent the frosting condition of the evaporator, if the surface temperature of the evaporator is relatively low, the frosting on the surface of the evaporator is indicated, and the defrosting is needed, and if the surface temperature of the evaporator is relatively high, the frosting on the surface of the evaporator is not indicated, and the defrosting is not needed. Therefore, the opening and closing of the first heating device are controlled according to the surface temperature of the evaporator, and whether defrosting operation is performed or not is controlled.
And the second control module 30 is configured to control the opening and closing of the second heating device according to the temperature of the area where the second heating device is located after the first heating device is started for the preset time. After first heating device opened the preset time, under normal conditions, the region that the second heating device was located is first heating device's blind area, therefore, its temperature does not have too big change, consequently if this region frosts, will not be dissolved, but, also probably this region does not frosted, does not need to change the frost, consequently, after first heating device opened the preset time, whether need to change the frost to this region according to the temperature determination in second heating device place region, control the switching of second heating device promptly.
In the defrosting control device of the embodiment, the temperature acquisition module 10 is used for acquiring the surface temperature of the evaporator and the temperature of the area where the second heating device is located; the opening and closing of the first heating device are controlled by the first control module 20 according to the surface temperature of the evaporator; after the first heating device is turned on for a preset time, the second control module 30 controls the second heating device in the heating blind area of the first heating device to be turned on or off according to the temperature of the area where the second heating device is located. The defrosting blind area can be eliminated, the problem of frost block residue is avoided, the reliability of operation of the air cooler unit is improved, and the user experience is improved.
Example 4
In this embodiment, another defrosting control device is provided, and fig. 6 is a structural diagram of the defrosting control device according to an embodiment of the present invention, in order to accurately control the timing of opening and closing the first heating device, as shown in fig. 6, the first control module 20 specifically includes: a first judgment unit 201 for judging whether the evaporator surface temperature is less than a first threshold; a first control unit 202 for controlling the first heating device to be turned on when the evaporator surface temperature is less than a first threshold; a second control unit 203 for controlling the first heating means to remain off when the evaporator surface temperature is not less than the first threshold.
After the first heating device is controlled, defrosting is started, after defrosting is completed, the surface temperature of the evaporator rises, at this time, defrosting does not need to be continued, and the air cooler can be controlled to return to normal operation, so that the first judgment unit 201 is further configured to judge whether the surface temperature of the evaporator is greater than a second threshold value after the first heating device is started, where the second threshold value is greater than the first threshold value; the first control unit 202 is further configured to control the first heating device to be kept on and continue defrosting when the surface temperature of the evaporator is not greater than a second threshold; the second control unit 203 is further configured to control the first heating device to be turned off and stop defrosting when the surface temperature of the evaporator is greater than a second threshold;
similarly, in order to accurately control the timing of opening and closing the second heating device, the second control module 30 specifically includes: a second judging unit 301, configured to judge whether the temperature of the area where the second heating device is located is less than a third threshold; a third control unit 302, configured to control the second heating device to be turned on to defrost when the temperature of the area where the second heating device is located is less than a third threshold; a fourth control unit 303, configured to control the second heating device to remain off when the temperature of the area where the second heating device is located is not less than the third threshold.
After controlling the second heating device, the defrosting is started, after the defrosting is completed, the temperature of the area where the second heating device is located may rise, and at this time, the defrosting does not need to be continued, so after controlling the second heating device to be turned on, the second determining unit 301 is further configured to: judging whether the temperature of the area where the second heating device is located is larger than a fourth threshold value; wherein the fourth threshold is greater than the third threshold; the third control unit 302 is further configured to control the second heating device to keep on when the temperature of the area where the second heating device is located is not greater than a fourth threshold; the fourth control unit 303 is further configured to control the second heating device to be turned off and stop defrosting when the temperature of the area where the second heating device is located is greater than a fourth threshold.
In the foregoing solution, whether defrosting is performed is judged according to temperature, and in other embodiments of the present invention, whether defrosting is performed may also be judged according to a combination of an operation time and a temperature of the compressor, and therefore, the apparatus may further include: a duration obtaining module 40, configured to obtain an accumulated operating duration of the compressor; the second control module 30 is further configured to control the second heating device to be turned on or off according to the accumulated operating time and the temperature of the area where the second heating device is located.
Specifically, the second control module 30 further includes a third determining unit 304, configured to determine whether a difference between the accumulated operating time and the set operating time is smaller than a preset value, and whether the temperature of the area where the second heating device is located is smaller than a fifth threshold value; because the defrosting operation is carried out frequently according to the accumulated running time, the starting condition is looser, and the fifth threshold is smaller than the third threshold; the third control unit 302 is further configured to control the second heating device to be turned on when a difference between the accumulated operating time and the set operating time is smaller than a preset value and the temperature of the area where the second heating device is located is smaller than a fifth threshold value and is satisfied at the same time, and control the second heating device to be turned off by the fourth control unit 303 until the temperature of the area where the second heating device is located is greater than a fourth threshold value; the fourth control unit 303 is further configured to control the second heating device to keep turning off when the difference between the accumulated operating time and the set operating time is smaller than the preset value and the temperature of the area where the second heating device is located is smaller than the fifth threshold value. Through above-mentioned structure, can open the second heating device in advance, carry out the defrosting in advance, improve the total efficiency of defrosting.
After the second heating device is turned on to perform pre-defrosting, if the accumulated operation time reaches the set operation time, the whole evaporator indicates that defrosting is required, and then only turning on the second heating device cannot solve the problem of frosting in other areas, so the first control module 20 is further configured to control the turning on and off of the first heating device according to the accumulated operation time and the surface temperature of the evaporator. Specifically, the first control module 20 further includes: a fourth judging unit 204, configured to judge whether the accumulated operating time is equal to the set operating time and the evaporator surface temperature is lower than a sixth threshold, where the defrosting operation is performed according to the accumulated operating time more frequently, so that the starting condition is looser, and the sixth threshold is lower than the first threshold; the first control unit 202 is further configured to control the first heating device to be turned on for defrosting when the accumulated operation time is equal to the set operation time and the evaporator surface temperature is lower than a sixth threshold and is simultaneously established, and control the first heating device to be turned off by the second control unit 203 until the evaporator surface temperature is higher than the second threshold, and stop defrosting; the second control unit 203 is also used; and when the accumulated running time is equal to the set running time and the surface temperature of the evaporator is not less than the sixth threshold value, controlling the first heating device to be kept closed.
Example 5
The embodiment provides another defrosting control method, which is applied to an air cooler unit, as shown in fig. 1 mentioned above, two temperature sensors are arranged in the air cooler unit, one of the two temperature sensors is arranged in the area where a first heating device is located, and is used for controlling the surface temperature T1 of an evaporator, so as to realize control over the first heating device, and the other temperature sensor is arranged in the area where a second heating device is located, that is, the heating blind area of the first heating device, for example, the first heating device is a heating pipe, one side of the heating pipe without a resistance wire has a longer cold end, and the cold end is the heating blind area of the first heating device, and is a position where frosting is easy to occur. When the unit enters a defrosting mode, the first group of defrosting heating pipes are started preferentially to defrost, and meanwhile, the second heating device is started to defrost when the temperature of the area where the second heating device is located reaches the defrosting temperature by detecting the temperature T2 of the area where the second heating device is located. Wherein the power of the second heating device is less than the temperature of the first heating device.
The defrosting control method of the embodiment comprises the following steps:
and S1, judging whether the first heating device is started to defrost according to the surface temperature T1 of the evaporator.
Synchronously detecting the evaporator surface temperature T1 and the temperature T2 of the area where the second heating device is located, wherein the evaporator surface temperature T1 is less than a first threshold value (for example T0-4 ℃), the first heating means is controlled to be switched on until the evaporator surface temperature T1 is greater than a two-threshold value (for example T1)0) Then, controlling the first heating device to be closed;
and S2, after the first heating device is started for a preset time, the second heating device is started for defrosting according to the temperature T2 of the area where the second heating device is judged whether to be in.
After the first heating device is started for a preset time, detecting whether the temperature T2 of the area where the second heating device is located is less than a third threshold (for example, T1-5 ℃), and if so, controls the second heating means to turn on, defrosting in synchronism with the first heating means, until the temperature T2 of the area where the second heating means is located is greater than a fourth threshold value (for example T)1) Then, controlling the second heating device to be closed; if not, the second heating device is controlled to be kept closed. The starting time of the first heating device and the second heating device is staggered through the steps, so that the problem of low defrosting efficiency is caused.
And S3, detecting the accumulated running time of the compressor, and judging whether the second heating device is started to defrost according to the accumulated running time of the compressor and the temperature T2 of the area where the second heating device is located.
For example, a set operation time length Xmin of the compressor is obtained, when the cumulative operation of the compressor reaches a certain value (for example, (X-10) min), whether the temperature T2 of the area where the second heating device is located is smaller than a fifth threshold (for example, 12 ℃) or not is judged, if yes, the second heating device is controlled to be started to defrost, until the temperature T2 of the area where the second heating device is located reaches the fourth threshold, the second heating device is controlled to be stopped, defrosting is quitted, and if not, the second heating device is controlled to be kept stopped.
S4, when the accumulated running time of the compressor reaches the set running time Xmin, synchronously detecting the surface temperature T1 of the evaporator and the temperature T2 of the area where the second heating device is located, and controlling the first heating device to be started when the surface temperature T1 of the evaporator is smaller than a fifth threshold (the fifth threshold is larger than the first threshold), and controlling the first heating device to be stopped until the surface temperature T1 of the evaporator is larger than the second threshold; synchronously detecting whether the temperature T2 of the area where the second heating device is located is smaller than a sixth threshold (larger than a third threshold), if so, controlling the second heating device to be started, and defrosting with the first heating device synchronously, and controlling the second heating device to be stopped until the temperature T2 of the area where the second heating device is located is larger than a fourth threshold; if not, the second heating device is controlled to be kept closed.
According to the defrosting control method, the heating blind area of the first heating device is heated in a centralized manner by controlling the second heating device, the heating blind area of the original first heating device is eliminated, the condition that frost cannot be completely dissolved completely due to long-term accumulation and enlargement is avoided, meanwhile, the heating time of the first heating device is reduced, the overall heating time is shortened, after the first heating device is controlled to operate for a period of time, the second heating device is controlled to be started to accelerate the defrosting effect, the condition that the temperature of a warehouse rises due to continuous starting of the first heating device and the actual defrosting effect is poor is avoided, the electric energy use can be reduced, the synchronous warehouse temperature fluctuation is reduced, the problem that icing and accumulation are caused by uneven defrosting due to defrosting residue is solved, and the problem that a large amount of ice blocks a fan and the unit is abnormal in operation is avoided; thereby avoiding the damage of the food in the refrigeration house and avoiding the complaint of customers.
Example 6
This embodiment provides an air-cooler unit, air-cooler unit includes the defrosting controlling means in the above-mentioned embodiment, still includes: the heating device comprises a first heating device and a second heating device, wherein the first heating device is arranged in a heating blind area of the first heating device, the first heating device and the second heating device are used for defrosting, and the power of the second heating device is smaller than that of the first heating device. The defrosting device is used for eliminating defrosting blind areas, avoiding the problem of frost block residue, improving the reliability of operation of the air cooler unit and improving user experience.
Example 7
The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the defrosting control method in the above-described embodiments.
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 (14)
1. A defrosting control method is characterized in that the method is applied to an air cooler unit, the air cooler unit comprises an evaporator, a first heating device and a second heating device, the second heating device is arranged in a heating blind area of the first heating device, and the first heating device and the second heating device are used for defrosting, and the method comprises the following steps:
acquiring the surface temperature of the evaporator and the temperature of the area where the second heating device is located;
controlling the opening and closing of the first heating device according to the surface temperature of the evaporator;
and after the first heating device is started for a preset time, controlling the second heating device to be opened and closed according to the temperature of the area where the second heating device is located.
2. The method of claim 1, wherein controlling the opening and closing of the first heating device based on the evaporator surface temperature comprises:
judging whether the surface temperature of the evaporator is less than a first threshold value or not;
if yes, controlling the first heating device to be started;
and if not, controlling the first heating device to keep off.
3. The method of claim 2, wherein after controlling the first heating device to turn on, the method further comprises:
judging whether the surface temperature of the evaporator is greater than a second threshold value or not; wherein the second threshold is greater than the first threshold;
if yes, controlling the first heating device to be closed;
and if not, controlling the first heating device to be kept started.
4. The method of claim 1, wherein controlling the second heating device to be turned on and off according to the temperature of the area where the second heating device is located after the first heating device is turned on for a preset time comprises:
judging whether the temperature of the area where the second heating device is located is smaller than a third threshold value;
if yes, controlling the second heating device to be started;
and if not, controlling the second heating device to keep off.
5. The method of claim 4, wherein after controlling the second heating device to turn on, the method further comprises:
judging whether the temperature of the area where the second heating device is located is larger than a fourth threshold value or not; wherein the fourth threshold is greater than the third threshold;
if yes, controlling the second heating device to be closed;
and if not, controlling the second heating device to be kept started.
6. The method of claim 1, further comprising:
acquiring the accumulated running time of the compressor;
and controlling the opening and closing of the second heating device according to the accumulated running time and the temperature of the area where the second heating device is located.
7. The method of claim 6, wherein controlling the opening and closing of the second heating device based on the accumulated operating time and the temperature of the area in which the second heating device is located comprises:
judging whether the difference value between the accumulated operation time length and the set operation time length is smaller than a preset value and whether the temperature of the area where the second heating device is located is smaller than a fifth threshold value simultaneously; wherein the fifth threshold is less than a third threshold;
if so, controlling the second heating device to be started, and controlling the second heating device to be stopped until the temperature of the area where the second heating device is located is greater than a fourth threshold value;
and if not, controlling the second heating device to keep off.
8. The method of claim 6, wherein after controlling the opening and closing of the second heating device based on the accumulated operating time and the temperature of the area in which the second heating device is located, the method further comprises:
and controlling the opening and closing of the first heating device according to the accumulated running time and the surface temperature of the evaporator.
9. The method of claim 8, wherein controlling the opening and closing of the first heating device based on the accumulated operating time period and the evaporator surface temperature comprises:
judging whether the accumulated operation time length is equal to the set operation time length and the surface temperature of the evaporator is smaller than a sixth threshold value, wherein the sixth threshold value is smaller than the first threshold value;
if so, controlling the first heating device to be started, and controlling the first heating device to be stopped until the surface temperature of the evaporator is greater than a second threshold value;
and if not, controlling the first heating device to keep off.
10. A defrosting control apparatus for implementing the defrosting control method according to any one of claims 1 to 9, the apparatus comprising:
the temperature acquisition module is used for acquiring the surface temperature of the evaporator and the temperature of the area where the second heating device is located;
the first control module is used for controlling the opening and closing of the first heating device according to the surface temperature of the evaporator;
and the second control module is used for controlling the opening and closing of the second heating device according to the temperature of the area where the second heating device is located after the first heating device is started for the preset time.
11. The defrosting control apparatus of claim 10 wherein the obtaining module comprises:
the first temperature sensor is arranged on the evaporator and used for acquiring the surface temperature of the evaporator;
and the second temperature sensor is arranged in the area where the second heating device is located and used for acquiring the temperature of the area where the second heating device is located.
12. An air cooler assembly, characterized in that it comprises the defrosting control device of claim 10 or 11, further comprising:
first heating device and second heating device, first heating device sets up first heating device's heating blind area, first heating device with the second heating device is used for the defrosting.
13. The air cooler assembly according to claim 12, wherein the second heating means has a power less than the power of the first heating means.
14. 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113776263A (en) * | 2021-08-25 | 2021-12-10 | 珠海格力电器股份有限公司 | Evaporator defrosting control method and device and refrigerator |
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Application publication date: 20210514 |