CN110715503B - Control method and device of refrigeration equipment and refrigeration equipment - Google Patents
Control method and device of refrigeration equipment and refrigeration equipment Download PDFInfo
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- CN110715503B CN110715503B CN201910915084.4A CN201910915084A CN110715503B CN 110715503 B CN110715503 B CN 110715503B CN 201910915084 A CN201910915084 A CN 201910915084A CN 110715503 B CN110715503 B CN 110715503B
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- refrigeration
- fin
- working condition
- fins
- frosting
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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
- F25D21/004—Control mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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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
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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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
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/30—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being attachable to the element
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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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2215/00—Fins
- F28F2215/14—Fins in the form of movable or loose fins
Abstract
The invention relates to a control method and a control device of refrigeration equipment and the refrigeration equipment, wherein a heat exchanger of the refrigeration equipment is provided with fins with adjustable intervals, and the method comprises the following steps: acquiring frosting information of a heat exchanger and temperature change information of an acting object of the refrigeration equipment when the refrigeration equipment operates under the current refrigeration working condition; determining whether to adjust the current refrigeration working condition according to the frosting information and the temperature change information; if the current refrigeration working condition needs to be adjusted, controlling a fin adjusting device corresponding to fins to adjust the first fin spacing between at least two first target fins to a spacing value corresponding to the required refrigeration working condition according to the incidence relation between the preset refrigeration working condition and the fin spacing, so that refrigeration equipment can refrigerate or defrost the fins in a fin frostless state; the defrosting of the heat exchanger is realized rapidly and reliably under the conditions of no consumption of electric energy, no heat fluorine and the like. The invention can improve the reliability of defrosting under the condition of using less energy and can reduce the defrosting cost at the same time.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a control method and device of refrigeration equipment and the refrigeration equipment.
Background
In the refrigeration and freezing refrigeration industries, most of small and medium-sized cold storages adopt a heat exchanger of refrigeration equipment as a tail end for refrigeration and cooling, wherein the cold storages are divided into a high-temperature storage, a medium-temperature storage and a low-temperature storage, and particularly, when the heat exchanger is applied to the low-temperature storage, the frost and ice blockage are easy to occur, the refrigeration effect is influenced, the service life of the heat exchanger is prolonged, and the like.
In the prior art, the common defrosting method is to adopt electric heating defrosting or hot fluorinating defrosting. The electric heating defrosting is to directly utilize electric energy to heat frosting of the heat exchanger, but a large amount of power is consumed, and the power consumption is large; the hot fluorination frost is characterized in that high-temperature and high-pressure exhaust is directly pumped into the cold row to enable the cold row to generate heat, a frost layer is firstly melted at the joint of the frost layer and the cold row and then automatically falls off, but the prior art of the hot fluorination frost is not mature, so that the phenomenon of oil shortage is easily caused when a plurality of units cannot return refrigerant oil to a system after the units adopt the refrigerant oil, and the reliability of the hot fluorination frost is lower.
Therefore, how to improve the reliability of defrosting with less energy is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for controlling a refrigeration apparatus, and a refrigeration apparatus, so as to solve the problems of the prior art that energy consumption is high and defrosting reliability is low during defrosting.
In order to achieve the above object, the present invention provides a method for controlling a refrigeration apparatus, a heat exchanger of the refrigeration apparatus being provided with fins having adjustable pitches, the method comprising:
acquiring frosting information of the heat exchanger and temperature change information of an acting object of the refrigeration equipment when the refrigeration equipment operates under the current refrigeration working condition;
determining whether to adjust the current refrigeration working condition according to the frosting information and the temperature change information;
if the current refrigeration working condition is determined to be adjusted, controlling a fin adjusting device corresponding to the fins to adjust the first fin spacing between at least two first target fins to a spacing value corresponding to the required refrigeration working condition according to the incidence relation between the preset refrigeration working condition and the fin spacing, so that the refrigeration equipment can refrigerate or defrost the fins in the frostless state of the fins.
Further, the above method for controlling a refrigeration apparatus, if it is determined that the current refrigeration condition needs to be adjusted, controlling a fin adjusting device corresponding to the fin to adjust a first fin pitch between at least two first target fins to a pitch value corresponding to a required refrigeration condition according to a preset incidence relation between the refrigeration condition and the fin pitch, further includes:
taking the refrigeration working condition adjacent to the current refrigeration working condition as the demand refrigeration working condition; or
And determining the required refrigeration working condition according to the frosting information and the temperature change information.
Further, the control method of the refrigeration equipment further includes:
and if the fact that the distance between the fins is the maximum set distance and the frosting information indicates that frosting exists is detected, controlling an ultrasonic defrosting device of the refrigeration equipment to defrost the fins.
Further, in the method for controlling a refrigeration apparatus, before the ultrasonic defrosting device that controls the fins to defrost the fins, the method further includes:
detecting whether the first fin spacing is the maximum set distance;
correspondingly, the ultrasonic wave of control refrigeration plant defrosting device is right the fin is defrosted, includes:
and if the fin distance is the maximum set distance, controlling an ultrasonic defrosting device of the refrigeration equipment to defrost the fins.
Further, in the method for controlling a refrigeration apparatus, before the obtaining of the frosting information of the heat exchanger and the temperature change information of the acting object of the refrigeration apparatus when the refrigeration apparatus operates under the current refrigeration condition, the method further includes:
acquiring space information of the action object and a refrigeration load of the action object;
determining an initial refrigeration working condition of the refrigeration equipment according to the space information and the refrigeration load;
and controlling a fin adjusting device corresponding to the fins to adjust the second fin spacing between at least two second target fins to a spacing value corresponding to the initial refrigeration working condition according to the incidence relation between the refrigeration working condition and the fin spacing.
Further, in the control method of the refrigeration apparatus, the frosting information includes frosting or frosting absence; the temperature change information comprises a temperature reduction change value or a temperature rise change value;
the determining that the current refrigeration condition needs to be adjusted includes:
if the frosting information indicates frosting and the temperature change information indicates the cooling change value, determining that the current refrigeration working condition needs to be adjusted;
if the frosting information indicates frosting, the temperature change information indicates a temperature rise change value, and the temperature rise change value is located outside a first state change range value corresponding to the preset frosting information, determining that the current refrigeration working condition needs to be adjusted;
if the frosting information is frostless, the temperature change information is the cooling change value, and the cooling change value is located in a second preset state change range value corresponding to the frosting information, determining that the current refrigeration working condition needs to be adjusted;
and if the frosting information is frosting-free, the temperature change information is the temperature rise change value, and the temperature rise change value is larger than a preset temperature threshold value, determining that the current refrigeration working condition needs to be adjusted.
The invention also provides a control device of the refrigeration equipment, a heat exchanger of the refrigeration equipment is provided with fins with adjustable intervals, and the device comprises:
the first acquisition module is used for acquiring frosting information of the heat exchanger and temperature change information of an action object of the refrigeration equipment when the refrigeration equipment operates under the current refrigeration working condition;
the first determining module is used for determining whether to adjust the current refrigeration working condition according to the frosting information and the temperature change information;
and the control module is used for controlling a fin adjusting device corresponding to the fins to adjust the first fin spacing between at least two first target fins to a spacing value corresponding to the required refrigeration working condition according to the incidence relation between the preset refrigeration working condition and the fin spacing if the first determining module determines that the current refrigeration working condition needs to be adjusted, so that the refrigeration equipment can refrigerate or defrost the fins in the fin frostless state.
Further, in the control device of the refrigeration apparatus, the control module is further configured to control the ultrasonic defrosting device of the refrigeration apparatus to defrost the fins if it is detected that the fin pitch is the maximum set distance and the frosting information indicates frosting.
Further, the control device of the refrigeration equipment further comprises a second obtaining module and a second determining module;
the second acquisition module is used for acquiring the space information of the action object and the refrigeration load of the action object;
the second determining module is used for determining the initial refrigeration working condition of the refrigeration equipment according to the space information and the refrigeration load;
the control module is further configured to control the fin adjusting device corresponding to the fins to adjust the second fin spacing between the at least two second target fins to a spacing value corresponding to the initial refrigeration working condition according to the incidence relation between the refrigeration working condition and the fin spacing.
The invention also provides a refrigeration device, which comprises a controller and a heat exchanger;
the heat exchanger comprises a heat exchange tube, fins and a fin adjusting device;
the fins are arranged on the heat exchange tube through the fin adjusting device;
the fin adjusting device is connected with the controller;
the controller is used for executing the control method of the refrigeration equipment.
Further, in the refrigeration apparatus described above, the fins include a first sub-fin and a second sub-fin;
the first sub-fin and the second sub-fin are integrally arranged or separately arranged.
Further, in the above refrigeration equipment, the fin adjusting device includes a rail and a driving part;
the fins are arranged on the heat exchange tube through the tracks;
the driving part is respectively connected with the fin and the controller;
the controller controls the driving part to drive the fin to move along the track.
Further, in the above refrigeration device, the refrigeration device includes an air conditioner and/or a refrigerator.
According to the control method and device of the refrigeration equipment and the refrigeration equipment, the frosting information of the heat exchanger and the temperature change information of an acting object of the refrigeration equipment are obtained when the refrigeration equipment operates under the current refrigeration working condition; determining whether to adjust the current refrigeration working condition according to the frosting information of the heat exchanger and the temperature change information of an acting object of the refrigeration equipment; if the current refrigeration working condition needs to be adjusted, the fin adjusting device corresponding to the fins is controlled to adjust the first fin spacing between the at least two first target fins to the spacing value corresponding to the required refrigeration working condition according to the incidence relation between the preset refrigeration working condition and the fin spacing, so that the refrigeration equipment can refrigerate or defrost the fins in a fin frostless state, and the heat exchanger can be defrosted quickly and reliably under the conditions of no electric energy consumption, no hot fluorine consumption and the like. By adopting the technical scheme of the invention, the reliability of defrosting can be improved under the condition of utilizing less energy, and meanwhile, the defrosting cost can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an embodiment of a method of controlling a refrigeration unit of the present invention;
FIG. 2 is a schematic diagram of a heat exchanger of the refrigeration apparatus of the present invention;
FIG. 3 is a schematic structural diagram of a first embodiment of a control device of a refrigeration apparatus according to the present invention;
FIG. 4 is a schematic structural diagram of a second embodiment of a control device of a refrigeration apparatus according to the present invention;
fig. 5 is a schematic structural diagram of an embodiment of the refrigeration apparatus of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a flowchart of an embodiment of a method for controlling a refrigeration apparatus according to the present invention, and as shown in fig. 1, the method for controlling a refrigeration apparatus according to this embodiment may specifically include the following steps:
100. acquiring frosting information of a heat exchanger and temperature change information of an acting object of the refrigeration equipment when the refrigeration equipment operates under the current refrigeration working condition;
in a specific implementation process, when the refrigeration equipment operates, the refrigeration equipment can be divided into a plurality of refrigeration working conditions according to the refrigeration capacity of the heat exchanger of the refrigeration equipment, the refrigeration working condition corresponding to the larger refrigeration capacity is higher, and the refrigeration working condition corresponding to the smaller refrigeration capacity is lower. In this embodiment, the cooling condition of the refrigeration equipment may change along with the change of the cooling load of the acting object of the refrigeration equipment. For example, the refrigeration target may be a refrigerator, and when the quantity of the articles stored in the refrigerator is large or the required temperature is low, the refrigeration load of the refrigerator is relatively large, and the working condition of the refrigeration equipment is relatively high.
When the refrigeration equipment runs, the temperature of an acting object of the refrigeration equipment is changed, and the fins on the heat exchanger may be frosted or not frosted. When the temperature of an acting object of the cooling equipment is gradually increased and then is kept at a certain temperature, the fins on the heat exchanger generally do not frost; on the contrary, when the temperature of the acting object of the cooling device is gradually decreased and then is maintained at a certain temperature, at this time, frosting may occur on the fins on the heat exchanger, and therefore, in this embodiment, frosting information of the heat exchanger on the heat exchanger and temperature change information of the acting object of the cooling device need to be acquired.
101. Determining whether to adjust the current refrigeration working condition according to the frosting information of the heat exchanger and the temperature change information of an acting object of the refrigeration equipment;
specifically, the frosting information of the heat exchanger comprises frosting or frosting-free; the temperature change information of the acting object of the refrigeration equipment comprises a temperature reduction change value or a temperature rise change value. And if the frosting information of the heat exchanger is frosting and the temperature change information of the acting object is a cooling change value, determining that the current refrigeration working condition needs to be adjusted. That is to say, the current refrigeration operating mode can lead to the temperature of effect object to further reduce, and at this moment, if the frosting information of heat exchanger is for there being the frosting, then can lead to frosting more seriously, so can confirm to adjust current refrigeration operating mode to the operation of defrosting.
And if the frosting information of the heat exchanger is frosting, the temperature change information of the acting object is a temperature rise change value, and the temperature rise change value is positioned outside a first state change range value corresponding to the preset frosting information, and the current refrigeration working condition is determined to be adjusted. That is to say, the current refrigeration operating mode can lead to the temperature of effect object to rise gradually, but even after the temperature of effect object rose, still can not make the frosting of heat exchanger melt, so can confirm to adjust current refrigeration operating mode to the operation of defrosting. For example, under the current refrigeration condition, the temperature of the acting object of the refrigeration equipment in a specified period of time in the future can rise to-18 ℃. According to actual experience, the temperature of the heat exchange without frosting needs to be higher than-15 ℃, so that the temperature rise change value is located outside the first state change range value corresponding to the preset frosting information, and at the moment, the current refrigeration working condition needing to be adjusted can be determined. Otherwise, determining that the current refrigeration working condition does not need to be adjusted.
And if the frosting information of the heat exchanger is frostless, the temperature change information of the acting object is a cooling change value, and the cooling change value is located in a second state change range value corresponding to the preset frosting information, determining that the current refrigeration working condition needs to be adjusted. That is to say, the current refrigeration operating mode can lead to the temperature of effect object to further reduce, along with the temperature reduces, the frosting of probably producing of heat exchanger, so can confirm to need to adjust current refrigeration operating mode to the operation of defrosting. For example, under the current refrigeration working condition, the temperature of the acting object of the refrigeration equipment in a specified period of time in the future can be reduced to-18 ℃. According to actual experience, the temperature of the heat exchange frosting is required to be lower than-15 ℃, so that the temperature reduction change value is located in a second state change range value corresponding to preset frosting information, and at the moment, the current refrigeration working condition can be determined to be adjusted.
And if the frosting information of the heat exchanger is frostless, the temperature change information of the acting object is a temperature rise change value, and the temperature rise change value is larger than a preset temperature threshold value, determining that the current refrigeration working condition needs to be adjusted. That is to say, the current refrigeration operating mode can lead to the temperature rise of effect object, if the temperature rise exceeds preset temperature threshold value, it is poor to explain heat exchanger heat transfer effect, can confirm to need to adjust current refrigeration operating mode. For example, the maximum temperature of the acting object is set to-15 ℃, but under the current refrigeration working condition, the temperature rise change value of the acting object is-10 ℃, which indicates that the heat exchange effect of the heat exchanger is poor, and the current refrigeration working condition can be determined to need to be adjusted.
102. And if the current refrigeration working condition is determined to be required to be adjusted, controlling a fin adjusting device corresponding to the fins to adjust the first fin spacing between the at least two first target fins to a spacing value corresponding to the required refrigeration working condition according to the preset incidence relation between the refrigeration working condition and the fin spacing.
In practical application, the refrigerating capacity of the heat exchanger is generally related to the heat exchange area, wherein the larger the heat exchange area is, the smaller the refrigerating capacity of the heat exchanger is, the smaller the heat exchange area is, and the larger the refrigerating capacity of the heat exchanger is. In this embodiment, in order to effectively defrost the fins of the heat exchanger or guarantee the heat exchange effect of the heat exchanger, the fins of the heat exchanger can be designed into a movable structure, so that when the same refrigeration equipment is used for refrigeration, different refrigeration amounts can be obtained by changing the distance between the fins, the heat exchange effect of the heat exchanger can be guaranteed while the fins are prevented from frosting, and then the refrigeration equipment can be used for refrigeration or defrosting the fins in the state that the fins are not frosted.
In one implementation, the refrigeration apparatus in this embodiment may include a controller and a heat exchanger. Fig. 2 is a schematic structural diagram of a heat exchanger of a refrigeration apparatus according to the present invention, and as shown in fig. 2, the heat exchanger of the present embodiment includes a heat exchange tube 211, a fin 212, and a fin adjusting device 213; the fins 212 are arranged on the heat exchange tube 211 through a fin adjusting device 213; the fin adjustment device 213 is connected to the controller.
Specifically, the fin adjusting means 213 includes a rail and a driving part; the fins 212 are arranged on the heat exchange tube 211 through rails; the driving part is respectively connected with the fin 212 and the controller; the controller controls the drive member to drive the fins 212 along the track. For example, the track is preferably made of a flexible material with serrations, and the fins 212 are configured to engage with the serrations of the track. The driving part may include a driving motor and an actuator, the actuator is connected to each fin 212, and when the fin 212 needs to be moved, the driving motor and the actuator may be used to drive the fin 212 to move along the track.
It should be noted that, in this embodiment, the fins 212 may move integrally or individually, so that the heat exchanger may have more different heat exchange areas to adapt to more working conditions. In addition, the fins 212 include a first sub-fin 2121 and a second sub-fin 2122; the first and second sub-fins 2121 and 2122 are integrally or separately provided. When the first sub-fin 2121 and the second sub-fin 2122 are separately arranged, the first sub-fin 2121 can be moved independently, the second sub-fin 2122 can be moved independently, and the first sub-fin 2121 and the second sub-fin 2122 can be moved simultaneously, so that the heat exchanger can have more different heat exchange areas and more corresponding refrigeration working condition numbers.
In a concrete implementation process, the refrigerating capacity of the heat exchanger in the refrigerating equipment when the fin distance is different is analyzed according to actual experience, the fin distance of the heat exchanger under different refrigerating capacities is obtained, and the incidence relation between the refrigerating working condition and the fin distance is formed for storage. Wherein, the demand refrigeration condition can be determined as follows: and taking the refrigeration working condition adjacent to the current refrigeration working condition as the demand refrigeration working condition, or determining the demand refrigeration working condition according to the frosting information and the temperature change information. For example, the fin pitch may be moved once by default according to the order of each refrigeration condition, and thus, the previous refrigeration condition or the next instruction condition adjacent to the current refrigeration condition is the required refrigeration condition of the refrigeration equipment, but the purpose of defrosting or increasing the refrigeration capacity may not be achieved by only adjusting the one-time refrigeration condition, and this way needs to adjust the refrigeration condition of the refrigeration equipment many times according to the order, and the defrosting efficiency or the refrigeration efficiency is reduced. Therefore, in this embodiment, calculation and analysis can be performed according to the frosting information and the temperature change information of the heat exchanger, and the predicted refrigeration condition of the refrigeration equipment during rapid defrosting or rapid refrigeration is obtained and is used as the demand refrigeration condition of the refrigeration equipment.
The present embodiment explains the technical solution of the present invention by taking the adjustment of the overall fin pitch as an example. The fin spacing is adjusted to any value, and can be divided into a plurality of spacing values such as A1, A2, A3 and … Ax, which respectively correspond to a plurality of working conditions such as refrigeration working conditions B1, B2, B3 and … Bx, under the default condition, the fin spacing corresponds to the refrigeration working condition B1 according to the minimum spacing value A1, and so on, the maximum spacing value Ax corresponds to the refrigeration working condition Bx.
For example, the refrigeration equipment is used for a refrigeration house, the surface of a fin continuously generates a frosting phenomenon in the process of continuously reducing the temperature of the refrigeration house, at the moment, a frosting detection sensor detects that the surface of a heat exchanger is frosted, a control signal is sent to a controller, the controller sends a control command to a fin adjusting device, the fin adjusting device starts to act to automatically increase the fin distance, when the distance value needs to be changed from A1 to A2, the corresponding refrigeration working condition B2 is obtained, at the moment, the adjustment of the size of the heat exchange area of the heat exchanger is automatically completed until the surface of the heat exchanger is not frosted, at the moment, the process of increasing the fin distance of an evaporator is completed, and by analogy, the fin distance of the evaporator can be continuously increased from Ax-1 to Ax, and the corresponding refrigeration working condition is adjusted from Bx-1 to Bx.
It should be noted that the required refrigeration condition can be determined according to the frosting information and the temperature change information, so that the fin spacing can be gradually adjusted on the surface. For example, the frost formation information indicates that frost is formed, and the change value corresponding to the temperature change information is decreased by 10 °. When the spacing value A2 can be analyzed through related formula analysis, frost cannot be melted, the spacing value of the fins needs to be adjusted to A3, and the determined required refrigeration working condition is B3.
When the temperature of the refrigeration house rises continuously, the heat exchange area of the heat exchanger is insufficient, and the surface of the heat exchanger does not frost, which indicates that the heat exchange is poor due to the overlarge fin spacing of the heat exchanger and the refrigerating capacity is too low, the fin spacing value is required to be automatically reduced and is changed from A2 to A1, which corresponds to the refrigerating working condition B1, at the moment, the defrosting detection sensor sends a control signal to the controller, the controller sends a command signal to the fin adjusting device, the fin adjusting device starts to act to automatically reduce the fin spacing, when the spacing value is required to be changed from A2 to A1, which corresponds to the refrigerating working condition B1, at the moment, the adjustment of the heat exchange area of the heat exchanger is automatically completed, the temperature of the refrigeration house is continuously reduced, the surface of the evaporator fins starts to frost, at the moment, the process of reducing the fin spacing of the evaporator fins is completed, and by analogy, the fin spacing, the corresponding refrigeration working condition is adjusted from Bx to Bx-1.
According to the control method of the refrigeration equipment, the frosting information of the heat exchanger and the temperature change information of an acting object of the refrigeration equipment are obtained when the refrigeration equipment operates under the current refrigeration working condition; determining whether to adjust the current refrigeration working condition according to the frosting information of the heat exchanger and the temperature change information of an acting object of the refrigeration equipment; if the current refrigeration working condition needs to be adjusted, the fin adjusting device corresponding to the fins is controlled to adjust the first fin spacing between the at least two first target fins to the spacing value corresponding to the required refrigeration working condition according to the incidence relation between the preset refrigeration working condition and the fin spacing, so that the refrigeration equipment can refrigerate or defrost the fins in a fin frostless state, and the heat exchanger can be defrosted quickly and reliably under the conditions of no electric energy consumption, no hot fluorine consumption and the like. By adopting the technical scheme of the invention, the reliability of defrosting can be improved under the condition of utilizing less energy, and meanwhile, the defrosting cost can be reduced.
In practical application, because the detector of defrosting detects the heat exchanger surface back of frosting, can send corresponding control signal promptly, make the fin interval increase, change the frost, so the frost layer on heat exchanger surface can not be very thick, change the frost time can not be very long, so under most circumstances, can be effective through the heat transfer area of increase heat exchanger, quick change the frost, only when the fin interval reaches the maximum value, still there is the phenomenon of frosting, explain can't reach the purpose of changing the frost through the heat transfer area who increases the heat exchanger, therefore, in this embodiment, whether need detect first fin interval for the biggest settlement distance, and when first fin interval has been the biggest settlement distance, detect the information of frosting whether for there is the frosting, so that according to the testing result, confirm that the ultrasonic wave that the control fin corresponds changes the frost device and changes the frost to the fin. Specifically, if the detection result indicates that the first fin pitch is the maximum set distance and the frosting information indicates that frosting exists, an additional defrosting means is required for defrosting, at this time, the ultrasonic defrosting device corresponding to the fin can be controlled to defrost the fin, if the detection result indicates that the first fin pitch is not the maximum set distance, the additional defrosting means is not required for defrosting, and at this time, the first fin pitch can be continuously increased.
For example, when freezer temperature dropped to the minimum, when adjusting the biggest distance of setting for through fin adjusting device with first fin interval, the heat exchanger surface still had the frosting phenomenon, and at this moment, the frost detection sensor that changes frosting detects that the fin surface has frosting, can send control signal to controller, and the controller sends control command to ultrasonic wave change white device to accomplish second grade and change white technical process, finally accomplished high-efficient defrosting, the defrosting is thorough.
In practical application, because the space size of refrigeration plant's effect object is different, the heat transfer area that often needs is different, consequently, in this embodiment, can select suitable heat transfer area according to the space size of refrigeration plant's effect object to avoid causing the energy extravagant, perhaps, avoid unable effective refrigeration.
In a specific implementation process, when the refrigeration equipment is started, the space information of an action object of the refrigeration equipment and the refrigeration load of the action object of the refrigeration equipment can be acquired; determining an initial refrigeration working condition of the refrigeration equipment according to the space information of the acting object of the refrigeration equipment and the refrigeration load of the acting object of the refrigeration equipment; according to the incidence relation between the refrigeration working condition and the fin spacing, the fin adjusting device corresponding to the fin is controlled to adjust the second fin spacing between the at least two second target fins to a spacing value corresponding to the initial refrigeration working condition, so that the refrigeration equipment can operate according to the determined second fin spacing corresponding to the initial refrigeration working condition, and after the operation, the processes of increasing and reducing the fin spacing of the embodiment are executed.
Specifically, the image information of the action object may be acquired by a camera or the like, and the spatial information of the action object may be acquired by further performing image analysis, or the spatial information of the action object may be entered by the user himself. The user can set up refrigeration plant's temperature etc. according to actual demand to can determine the refrigeration load of effect object according to the refrigeration plant's of setting for temperature etc. like this, can determine refrigeration plant's initial refrigeration operating mode according to the space information of effect object and the refrigeration load of effect object, so that refrigeration plant moves under initial refrigeration operating mode.
It should be noted that, since the space information of the acting object of the refrigeration equipment is often not changed after the refrigeration equipment is installed, the initial cooling condition affecting the refrigeration equipment is mostly determined by the cooling load of the acting object, but when the location of the refrigeration equipment is changed, the space information of the acting object also affects the space information of the acting object.
In order to more fully correspond to the control method of the refrigeration equipment provided in the embodiment of the present invention, the present application further provides a control device of the refrigeration equipment, fig. 3 is a schematic structural diagram of a first control device of the refrigeration equipment of the present invention, and as shown in fig. 3, the control device of the refrigeration equipment of the present embodiment includes a first obtaining module 10, a first determining module 11, and a control module 12. Wherein, the heat exchanger of refrigeration plant is provided with interval adjustable fin.
The first obtaining module 10 is configured to obtain frosting information of the heat exchanger and temperature change information of an acting object of the refrigeration equipment when the refrigeration equipment operates in a current refrigeration working condition;
the first determining module 11 is configured to determine whether to adjust the current refrigeration working condition according to the frosting information and the temperature change information;
and the control module 12 is configured to control, if the current refrigeration condition needs to be adjusted, a fin adjustment device corresponding to the fin to adjust a first fin distance between at least two first target fins to a distance value corresponding to a required refrigeration condition according to a preset incidence relation between the refrigeration condition and the fin distance, so that the refrigeration equipment performs refrigeration or defrosting on the fin in a state where the fin is not frosted.
The control device of the refrigeration equipment of the embodiment acquires frosting information of a heat exchanger and temperature change information of an acting object of the refrigeration equipment when the refrigeration equipment operates under the current refrigeration working condition; determining whether to adjust the current refrigeration working condition according to the frosting information of the heat exchanger and the temperature change information of an acting object of the refrigeration equipment; if the current refrigeration working condition needs to be adjusted, the fin adjusting device corresponding to the fins is controlled to adjust the first fin spacing between the at least two first target fins to the spacing value corresponding to the required refrigeration working condition according to the incidence relation between the preset refrigeration working condition and the fin spacing, so that the refrigeration equipment can refrigerate or defrost the fins in a fin frostless state, and the heat exchanger can be defrosted quickly and reliably under the conditions of no electric energy consumption, no hot fluorine consumption and the like. By adopting the technical scheme of the invention, the reliability of defrosting can be improved under the condition of utilizing less energy, and meanwhile, the defrosting cost can be reduced.
Further, in the above embodiment, the control module is further configured to use a refrigeration condition adjacent to the current refrigeration condition as a demand refrigeration condition; or determining the required refrigeration working condition according to the frosting information of the heat exchanger and the temperature change information of the acting object.
In a specific implementation process, in order to further improve the defrosting efficiency, the control module 12 is further configured to control the ultrasonic defrosting device of the refrigeration apparatus to defrost the fins if it is detected that the fin pitch is the maximum set distance and the frosting information indicates frosting.
Fig. 4 is a schematic structural diagram of a second control device of a refrigeration apparatus according to the present invention, and as shown in fig. 4, the control device of the refrigeration apparatus of this embodiment may further include a second obtaining module 14 and a second determining module 15 on the basis of the above embodiments;
a second obtaining module 14, configured to obtain space information of an acting object of the refrigeration equipment and a refrigeration load of the acting object of the refrigeration equipment;
the second determining module 15 is configured to determine an initial refrigeration condition of the refrigeration equipment according to the space information of the acting object of the refrigeration equipment and the refrigeration load of the acting object of the refrigeration equipment;
the control module 12 is further configured to control a fin adjusting device corresponding to the fins to adjust a second fin distance between at least two second target fins to a distance value corresponding to the initial refrigeration condition according to a preset incidence relation between the refrigeration condition and the fin distance.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
In order to be more comprehensive, the application further provides a refrigeration device corresponding to the filtering method provided by the embodiment of the present invention, fig. 5 is a schematic structural diagram of the embodiment of the refrigeration device of the present invention, as shown in fig. 5, the refrigeration device of the present embodiment includes a controller 20 and a heat exchanger 21; the heat exchanger 21 may be implemented by using the structure shown in fig. 2, and may include a heat exchange tube 211, a fin 212, and a fin adjustment device 213; the fins 212 are arranged on the heat exchange tube 211 through a fin adjusting device 213; the fin adjusting device 213 is connected to the controller 20; the controller 20 is configured to execute the control method of the refrigeration apparatus as described above.
Specifically, the fin adjusting means 213 includes a rail and a driving part; the fins are arranged on the heat exchange tube through the tracks; the driving parts are respectively connected with the fins and the controller 20; the controller 20 controls the driving part to drive the fin to move along the track.
Further, in the above-described embodiment, the fins 212 of the heat exchanger 21 include the first and second sub-fins 2121 and 2122; the first and second sub-fins 2121 and 2122 are integrally or separately provided.
In order to be more comprehensive, the present application also provides a storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the steps of the control method of the refrigeration apparatus according to the above embodiment.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. A control method of refrigeration equipment is characterized in that a heat exchanger of the refrigeration equipment is provided with fins with adjustable intervals, and the method comprises the following steps:
acquiring frosting information of the heat exchanger and temperature change information of an acting object of the refrigeration equipment when the refrigeration equipment operates under the current refrigeration working condition; wherein the temperature change information is future temperature change information of an action object of the refrigeration equipment;
determining whether to adjust the current refrigeration working condition according to the frosting information and the temperature change information;
if the current refrigeration working condition is determined to be adjusted, controlling a fin adjusting device corresponding to the fins to adjust the first fin spacing between at least two first target fins to a spacing value corresponding to the required refrigeration working condition according to the incidence relation between the preset refrigeration working condition and the fin spacing, so that the refrigeration equipment can refrigerate or defrost the fins in the frostless state of the fins.
2. The method according to claim 1, wherein if it is determined that the current refrigeration condition needs to be adjusted, controlling a fin adjusting device corresponding to the fins to adjust a first fin pitch between at least two first target fins to a pitch value corresponding to the required refrigeration condition according to a preset incidence relation between the refrigeration condition and the fin pitch, further comprises:
taking the refrigeration working condition adjacent to the current refrigeration working condition as the demand refrigeration working condition; or
And determining the required refrigeration working condition according to the frosting information and the temperature change information.
3. The control method of a refrigeration apparatus according to claim 1, characterized by further comprising:
and if the fact that the distance between the fins is the maximum set distance and the frosting information indicates that frosting exists is detected, controlling an ultrasonic defrosting device of the refrigeration equipment to defrost the fins.
4. The method for controlling the refrigeration equipment according to any one of claims 1 to 3, wherein before the obtaining of the frosting information of the heat exchanger and the temperature change information of the acting object of the refrigeration equipment when the refrigeration equipment operates at the current refrigeration working condition, the method further comprises:
acquiring space information of the action object and a refrigeration load of the action object;
determining an initial refrigeration working condition of the refrigeration equipment according to the space information and the refrigeration load;
and controlling a fin adjusting device corresponding to the fins to adjust the second fin spacing between at least two second target fins to a spacing value corresponding to the initial refrigeration working condition according to the incidence relation between the refrigeration working condition and the fin spacing.
5. The control method of a refrigeration apparatus according to any one of claims 1 to 3, wherein the frosting information includes frosting or frosting absence; the temperature change information comprises a temperature reduction change value or a temperature rise change value;
the determining that the current refrigeration condition needs to be adjusted includes:
if the frosting information indicates frosting and the temperature change information indicates the cooling change value, determining that the current refrigeration working condition needs to be adjusted;
if the frosting information indicates frosting, the temperature change information indicates a temperature rise change value, and the temperature rise change value is located outside a first state change range value corresponding to the preset frosting information, determining that the current refrigeration working condition needs to be adjusted;
if the frosting information is frostless, the temperature change information is the cooling change value, and the cooling change value is located in a second preset state change range value corresponding to the frosting information, determining that the current refrigeration working condition needs to be adjusted;
and if the frosting information is frosting-free, the temperature change information is the temperature rise change value, and the temperature rise change value is larger than a preset temperature threshold value, determining that the current refrigeration working condition needs to be adjusted.
6. A control device for a refrigeration apparatus, wherein a heat exchanger of the refrigeration apparatus is provided with fins whose pitch is adjustable, the device comprising:
the first acquisition module is used for acquiring frosting information of the heat exchanger and temperature change information of an action object of the refrigeration equipment when the refrigeration equipment operates under the current refrigeration working condition; wherein the temperature change information is future temperature change information of an action object of the refrigeration equipment;
the first determining module is used for determining whether to adjust the current refrigeration working condition according to the frosting information and the temperature change information;
and the control module is used for controlling a fin adjusting device corresponding to the fins to adjust the first fin spacing between at least two first target fins to a spacing value corresponding to the required refrigeration working condition according to the incidence relation between the preset refrigeration working condition and the fin spacing if the first determining module determines that the current refrigeration working condition needs to be adjusted, so that the refrigeration equipment can refrigerate or defrost the fins in the fin frostless state.
7. The control device of a refrigeration apparatus according to claim 6, wherein the control module is further configured to control an ultrasonic defrosting device of the refrigeration apparatus to defrost the fin if it is detected that the fin pitch is the maximum set distance and the frosting information indicates that frosting is generated.
8. The control device of the refrigeration equipment as recited in claim 6 or 7, further comprising a second obtaining module and a second determining module;
the second acquisition module is used for acquiring the space information of the action object and the refrigeration load of the action object;
the second determining module is used for determining the initial refrigeration working condition of the refrigeration equipment according to the space information and the refrigeration load;
the control module is further configured to control the fin adjusting device corresponding to the fins to adjust the second fin spacing between the at least two second target fins to a spacing value corresponding to the initial refrigeration working condition according to the incidence relation between the refrigeration working condition and the fin spacing.
9. A refrigeration apparatus comprising a controller and a heat exchanger;
the heat exchanger comprises a heat exchange tube, fins and a fin adjusting device;
the fins are arranged on the heat exchange tube through the fin adjusting device;
the fin adjusting device is connected with the controller;
the controller is used for executing the control method of the refrigeration equipment according to any one of claims 1 to 5.
10. The refrigeration appliance according to claim 9, wherein the fin comprises a first sub-fin and a second sub-fin;
the first sub-fin and the second sub-fin are integrally arranged or separately arranged.
11. The refrigeration appliance according to claim 9, wherein the fin adjustment device comprises a track and a drive member;
the fins are arranged on the heat exchange tube through the tracks;
the driving part is respectively connected with the fin and the controller;
the controller controls the driving part to drive the fin to move along the track.
12. A cold appliance according to claim 9, wherein the cold appliance comprises an air conditioner and/or a refrigerator.
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| CN109708340B (en) * | 2018-09-30 | 2021-01-05 | 合肥海尔电冰箱有限公司 | Evaporator using method |
| CN112566468B (en) * | 2020-12-10 | 2022-03-18 | 南京航空航天大学 | Airborne self-adaptive heat exchange system |
| CN112800700B (en) * | 2021-04-13 | 2021-06-25 | 中国空气动力研究与发展中心计算空气动力研究所 | Low-temperature surface dry mode frosting simulation method and device, electronic equipment and medium |
| CN113482808B (en) * | 2021-06-30 | 2022-11-01 | 东风汽车集团股份有限公司 | EGR cooler and EGR system |
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| JP4889747B2 (en) * | 2009-01-05 | 2012-03-07 | 三菱電機株式会社 | Heat exchanger and air conditioner equipped with the same |
| CN109307386A (en) * | 2018-09-12 | 2019-02-05 | 珠海格力电器股份有限公司 | The control method of finned heat exchanger, air-cooler and a pitch of fins |
| CN109708340B (en) * | 2018-09-30 | 2021-01-05 | 合肥海尔电冰箱有限公司 | Evaporator using method |
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