CN104101145B - The control method of refrigeration system and control circuit - Google Patents
The control method of refrigeration system and control circuit Download PDFInfo
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- CN104101145B CN104101145B CN201310114001.4A CN201310114001A CN104101145B CN 104101145 B CN104101145 B CN 104101145B CN 201310114001 A CN201310114001 A CN 201310114001A CN 104101145 B CN104101145 B CN 104101145B
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Abstract
The present invention provides control method and the control circuit of a kind of refrigeration system, wherein said refrigeration system includes compressor, controller and heat exchanger, described compressor cold-producing medium of conveying in heat exchanger is compressed, and control method includes: controller obtains control instruction；The heat exchanger that described controller controls described refrigeration system according to described control instruction is operated in the first mode of operation or the second mode of operation, and described heat exchanger has when being operated in the first mode of operation less than the described heat exchanger heat exchange area when the second mode of operation.The present invention also provides for corresponding control circuit.The technical scheme that the embodiment of the present invention provides, it is possible to simultaneously meet power consumption and the requirement of refrigerating capacity.
Description
Technical field
The present invention relates to refrigeration control technology, particularly relate to control method and the control circuit of a kind of refrigeration system.
Background technology
nullThe refrigeration system of refrigeration plant can be divided into compressor and two parts of heat exchanger,Wherein heat exchanger can include condenser、Device for drying and filtering、Capillary tube and vaporizer，Cold-producing medium therein is after compressor exports，Flow successively through above-mentioned parts，For chest freezer，It generally uses single refrigeration system，I.e. only one of which light pipe evaporator，Evaporating temperature is regulated by a capillary，The flow of capillary tube is fixing，Therefore the evaporating temperature of refrigeration system under certain operating temperature、Condensation temperature is also certain，Heating energy efficiency ratio (the CoefficientOfPerformance of same refrigeration system，Hereinafter referred to as: COP)、Refrigerating capacity is also fixing，COP therein is related to the power consumption of refrigeration system，Refrigerating capacity is related to the refrigerating capacity of refrigeration system，The i.e. refrigerating speed of refrigeration system，Therefore，For the horizontal refrigerator of single refrigeration system，Its power consumption and refrigerating capacity are all certain，And will not be varied from because the use state of user is different.
But single refrigeration system faces the contradiction of refrigerating speed and power consumption in actual use, want to make refrigerating speed enough fast, then power consumption will be very big, realizes relatively low power consumption and refrigerating speed then can be caused slack-off.
At present, the user of refrigerator, particularly commercial user can essentially be divided into both of which for the use of refrigerator, i.e. frozen mode and storage mode, wherein frozen mode refers to that the food under room temperature is put into refrigerator is refrigerated to the process of-18 DEG C, under this kind of pattern, user is more concerned about refrigeration system refrigerating capacity, i.e. chilling rate, quick freezing can avoid food spoilage, and make food form district quickly through-7 DEG C of ice crystals, ice crystal can be avoided to puncture cell wall as far as possible, reduce nutrient run off and at utmost keep food flavor, but also it is related to the sale shipment speed of commercial user；Storage mode is the pattern that the food in household freezer is maintained at less than-18 DEG C long term storages, and under this kind of pattern, it is low that user is more concerned with power consumption.
Additionally, at present for refrigeration plants such as refrigerators, national standard has mandatory standard GB12021.2 " household electric refrigerator power consumption limit value and energy efficiency grade " only for energy consumption grade, and for refrigerating capacity without compulsive requirement, and some quality examinations even country's incentive policy also tends to energy consumption grade, therefore the household electrical appliances power consumption the most of main flow is main target at present.For reaching minimum power consumption, then needing to meet the design of refrigerating capacity as far as possible the requirement of frozen food storage stage, refrigerant system design is more likely to meet and maintains-18 DEG C of needs.This kind of design inclination cause single system refrigerator when meeting power consumption and requiring, refrigerating capacity is low, it is impossible to meet user's requirement to refrigerating capacity.
Summary of the invention
The present invention provides control method and the control circuit of a kind of refrigeration system, in order to meet power consumption and the requirement of refrigerating capacity simultaneously.
The first aspect of the invention is to provide the control method of a kind of refrigeration system, and described refrigeration system includes compressor, controller and heat exchanger, and described compressor cold-producing medium of conveying in heat exchanger is compressed, and described method includes:
Controller obtains control instruction；
The heat exchanger that described controller controls described refrigeration system according to described control instruction is operated in the first mode of operation or the second mode of operation, and described heat exchanger has when being operated in the first mode of operation less than the described heat exchanger heat exchange area when the second mode of operation.
nullAbove-mentioned heat exchanger includes the first condenser、First electromagnetic valve、First capillary tube、First vaporizer、Second condenser、Second capillary tube and the second vaporizer，The input of described first condenser is connected with the outfan of the compressor of described refrigeration system，The outfan of described first condenser is connected with the input of described first electromagnetic valve，First outfan of described first electromagnetic valve is connected with the input of described first capillary tube，The outfan of described first capillary tube is connected to the input of described first vaporizer，The outfan of described first vaporizer is connected with the input of described compressor，The input of described second condenser is connected with the second outfan of described first electromagnetic valve，The outfan of described second condenser is connected with the input of described second capillary tube，The outfan of described second capillary tube is connected to the input of described second vaporizer，The outfan of described second vaporizer is connected with the input of described compressor；
Described control described refrigeration system according to control instruction and be operated in the first mode of operation or the second mode of operation includes:
When the described controller described heat exchanger of control is operated in the first mode of operation, open the first outfan of described first electromagnetic valve, close the second outfan of described first electromagnetic valve, and control described heat exchanger when being operated in the second mode of operation, open the second outfan of described first electromagnetic valve, close the first outfan of described first electromagnetic valve.
Or, above-mentioned heat exchanger includes that the second electromagnetic valve, the first heat exchanger channels and the second heat exchanger channels, described first heat exchanger channels and the second heat exchanger channels are connected in sequence by condenser, capillary tube and vaporizer；The input of described second electromagnetic valve is connected with the outfan of the compressor of described refrigeration system, first outfan of described second electromagnetic valve is connected with the input of described first heat exchanger channels, the outfan of described first heat exchanger channels is connected with the input of described compressor, second outfan of described second electromagnetic valve is connected with the input of described second heat exchanger channels, and the outfan of described second heat exchanger channels is connected with the input of described compressor；
Described control described refrigeration system according to control instruction and be operated in the first mode of operation or the second mode of operation includes:
When the described controller described heat exchanger of control is operated in the first mode of operation, open the first outfan of described second electromagnetic valve, close the second outfan of described second electromagnetic valve, and control described heat exchanger when being operated in the second mode of operation, open the second outfan of described second electromagnetic valve, closing the first outfan of described second electromagnetic valve, the heat exchange area of described second heat exchanger channels is more than the heat exchange area of described first heat exchanger channels.
Above-mentioned compressor is frequency-changeable compressor, and said method also includes:
Described controller controls the described frequency-changeable compressor operating frequency when the first mode of operation less than controlling the described frequency-changeable compressor operating frequency when the second mode of operation.
Above-mentioned refrigeration system also includes that frequency modulator, described frequency modulator are connected with described controller, and said method also includes:
Described controller controls described frequency modulator and is less than when the second mode of operation to the power supply frequency of described compressor to the power supply frequency of described compressor when the first mode of operation.
Another aspect of the present invention is to provide the control circuit of a kind of refrigeration system, controls switch and electromagnetic valve including the first temperature controller, compressor power supply circuits, mode of operation；
Being connected in described compressor power supply circuits of described first temperature controller, for being switched on or switched off the power supply circuits of described compressor according to refrigeration plant internal temperature control；
Described mode of operation controls switch series and is associated in the power supply circuits of described electromagnetic valve, for controlling the on off operating mode of described electromagnetic valve, the heat exchanger that described electromagnetic valve controls described refrigeration system according to different on off operating mode is operated in the first mode of operation or the second mode of operation, and described heat exchanger has when being operated in the first mode of operation less than the described heat exchanger heat exchange area when the second mode of operation.
Above-mentioned electromagnetic valve is three-way valve, including input, the first outfan and the second outfan；
When described mode of operation controls to switch off, input and described first outfan of described electromagnetic valve are open-minded, described second outfan cuts out, so that the heat exchanger of described refrigeration system is operated in the first mode of operation, when described mode of operation controls switch connection, input and described second outfan of described electromagnetic valve are open-minded, and described first outfan cuts out, so that the heat exchanger of described refrigeration system is operated in the second mode of operation.
Further, above-mentioned control circuit also includes frequency conversion control circuit, described frequency conversion control circuit is connected in described compressor power supply circuits, and is controlled on-off control by described mode of operation, is used for controlling the operating frequency disconnecting or connecting the described compressor of control of switch according to described mode of operation.
The control method of the refrigeration system that the present invention provides and control circuit, heat exchanger therein can be operated in two kinds of mode of operations, i.e. first mode of operation and the second mode of operation, and there is when being operated in the second mode of operation bigger heat exchange area and refrigerant flow, when being operated in the second mode of operation, refrigerating capacity is higher, and when being operated in the first mode of operation, owing to heat exchange area is less, the amount of required cold-producing medium is less, can just meet and can imitate and maintain-18 DEG C of temperature, its power consumption, relative to the second mode of operation, can be substantially reduced.Therefore, the control method of above-mentioned refrigeration system can control above-mentioned refrigeration system can reach the low power consumption under memory module, meets the national standard requirement to power consumption, is capable of again, to the quick freezing under quickly cooling pattern, improving chilling rate simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation one of refrigeration system in the embodiment of the present invention；
Fig. 2 is the schematic flow sheet of the control method of refrigeration system in the embodiment of the present invention；
Fig. 3 is the structural representation two of refrigeration system in the embodiment of the present invention；
Fig. 4 is the structural representation three of refrigeration system in the embodiment of the present invention；
Fig. 5 is the structural representation one of the control circuit of refrigeration system in the embodiment of the present invention；
Fig. 6 is the structural representation two of the control circuit of refrigeration system in the embodiment of the present invention.
Detailed description of the invention
Defect for prior art, embodiments provide the control method of a kind of refrigeration system, the most above-mentioned refrigeration system includes compressor 1, controller 2 and heat exchanger 3, described compressor 1 cold-producing medium of conveying in heat exchanger is compressed, and the schematic diagram of refrigeration system may refer to shown in Fig. 1.Fig. 2 is the schematic flow sheet of the control method of refrigeration system in the embodiment of the present invention, as in figure 2 it is shown, this control method includes:
Step 101, controller 2 obtain control instruction；
The heat exchanger 3 that step 102, described controller 2 control described refrigeration system according to described control instruction is operated in the first mode of operation or the second mode of operation, and described heat exchanger 3 has when being operated in the first mode of operation less than the described heat exchanger 3 heat exchange area when the second mode of operation.Concrete, this heat exchange area includes the condensation area of condenser in heat exchanger, and the disengagement area of vaporizer, and heat exchanger have when the first mode of operation less than the described heat exchanger heat exchange area when the second mode of operation specifically refer to heat exchanger be operated in the first mode of operation time, the condensation area of its condenser is less than condensation area when being operated in the second mode of operation, and the disengagement area of vaporizer is less than disengagement area during the second mode of operation.
The control method of the refrigeration system that the above embodiment of the present invention provides, heat exchanger therein can be operated in two kinds of mode of operations, i.e. first mode of operation and the second mode of operation, and there is when being operated in the second mode of operation bigger heat exchange area and refrigerant flow, when being operated in the second mode of operation, refrigerating capacity is higher, and when being operated in the first mode of operation, owing to heat exchange area is less, the amount of required cold-producing medium is less, can just meet and can imitate and maintain-18 DEG C of temperature, its power consumption, relative to the second mode of operation, can be substantially reduced.Therefore, the control method of above-mentioned refrigeration system can control above-mentioned refrigeration system can reach the low power consumption under memory module, meets the national standard requirement to power consumption, is capable of again, to the quick freezing under quickly cooling pattern, improving chilling rate simultaneously.
nullIn the above embodiment of the present invention，Heat exchanger therein may be implemented in a variety of ways，Concrete can corresponding different control methods，Concrete，As shown in Figure 3，Above-mentioned heat exchanger includes the first condenser 31、First electromagnetic valve 32、First capillary tube 33、First vaporizer 34、Second condenser 35、Second capillary tube 36 and the second vaporizer 37，The described input of the first condenser 31 is connected with the outfan of the compressor of described refrigeration system，The outfan of described first condenser 31 is connected with the input of described first electromagnetic valve 32，First outfan of described first electromagnetic valve 32 is connected with the input of described first capillary tube 33，The outfan of described first capillary tube 33 is connected to the input of described first vaporizer 34，The outfan of described first vaporizer 34 is connected with the input of described compressor 1，The input of described second condenser 35 is connected with the second outfan of described first electromagnetic valve 32，The outfan of described second condenser 35 and the input of the second capillary tube 36 connect，The outfan of described second capillary tube 36 is connected to the input of described second vaporizer 37，The outfan of described second vaporizer 37 is connected with the input of described compressor 1.
The step 102 of above-described embodiment is operated in the first mode of operation according to the described refrigeration system of control instruction control or the second mode of operation includes:
Described controller 2 controls described heat exchanger when being operated in the first mode of operation, open the first outfan of described first electromagnetic valve 32, close the second outfan of described first electromagnetic valve 32, and control described heat exchanger when being operated in the second mode of operation, open the second outfan of described first electromagnetic valve 32, close the first outfan of described first electromagnetic valve 32.
The refrigeration system that the present embodiment provides, when wherein heat exchanger is operated in the first mode of operation, cold-producing medium exports from compressor 1, pass sequentially through the first condenser 31, first electromagnetic valve 32, it is re-entered into compressor after first capillary tube 33 and the first vaporizer 34, when being operated in the second mode of operation, cold-producing medium exports from compressor 1, pass sequentially through the first condenser 31, first electromagnetic valve 32, second condenser 35, second capillary tube 36, it is re-entered into compressor 1 after second vaporizer 37 and the first vaporizer 34, as can be seen here, relative to the first mode of operation, the second mode of operation adds the second condenser 35 and the second vaporizer 37, heat exchange area increases, its exchange capability of heat significantly improves.In the particular embodiment, device for drying and filtering 38 can also be included, this device for drying and filtering 38 can be as indicated with 2, it is arranged between the firstth condenser 31 and the first electromagnetic valve 32, two devices for drying and filtering 38 can also be set, it is separately positioned between the first electromagnetic valve 38 and the first capillary tube 33, and between the first electromagnetic valve 32 and the second condenser 35.
nullAdditionally，Vaporizer in the above embodiment of the present invention can use band-tube type、Various types of vaporizers such as fin tubular type or fin tube type，When being applied to horizontal refrigerator when above-mentioned refrigeration system，Light pipe evaporator can be used，The first vaporizer and the second vaporizer canoe in refrigeration systems for above-mentioned employing light pipe evaporator can have multiple，Such as to the first vaporizer，Can use lower for endless form winding last time，The input of the i.e. first vaporizer is arranged on the bottom of the casing of refrigeration plant，And the outfan of the first vaporizer is arranged on the top of casing of refrigeration plant，When only using the first vaporizer，Cold-producing medium is positioned at the input of lower box interface from the first vaporizer，The interface output on casing top it is positioned at from the first vaporizer，Can ensure that power consumption is minimum，And the endless form that the second vaporizer uses down-feed and up-return is wound around，Position at lower box，Connect using tee T between the first vaporizer and the second vaporizer，Second vaporizer is connected to an input of tee T，First capillary tube is connected with another input of tee T，The outfan of tee T and the first vaporizer connect，In the second operation mode，First cold-producing medium will be positioned at the interface input on casing top from the second vaporizer，After tee T，The interface input of bottom it is positioned at from the first vaporizer，Again from the superposed outlet output of the first vaporizer，Eventually pass back to compressor，This kind of canoe makes cold-producing medium intersect from top to bottom，By circulating from bottom to top，Make casing cryogenic temperature everywhere close，Keep and the uniform temperature difference in case，Refrigeration can be played to greatest extent.
Additionally, as shown in Figure 4, also having another kind of refrigeration system, heat exchanger therein includes that the second electromagnetic valve the 41, first heat exchanger channels 42 and the second heat exchanger channels 43, described first heat exchanger channels 42 and the second heat exchanger channels 43 are connected in sequence by condenser, capillary tube and vaporizer；The input of described second electromagnetic valve 41 is connected with the outfan of the compressor 1 of described refrigeration system, first outfan of described second electromagnetic valve 41 is connected with the input of described first heat exchanger channels 42, the described outfan of the first heat exchanger channels 42 is connected with the input of described compressor, second outfan of described second electromagnetic valve 41 is connected with the input of described second heat exchanger channels 43, and the outfan of described second heat exchanger channels 43 is connected with the input of described compressor 1.Above-mentioned steps 102 is operated in the first mode of operation according to the described refrigeration system of control instruction control or the second mode of operation can specifically include:
Described controller 2 controls described heat exchanger when being operated in the first mode of operation, open the first outfan of described second electromagnetic valve 41, close the second outfan of described second electromagnetic valve 41, and control described heat exchanger when being operated in the second mode of operation, open the second outfan of described second electromagnetic valve 41, closing the first outfan of described second electromagnetic valve 41, the heat exchange area of described second heat exchanger channels is more than the heat exchange area of described first heat exchanger channels.I.e. according to the difference of mode of operation, one of them heat exchanger channels can be selected, and the second heat exchanger channels therein has bigger heat exchange area than the first heat exchanger channels, simultaneously, the second above-mentioned heat exchanger channels has bigger heat exchange area than the first heat exchanger channels, refer to the condensation area of condenser of the second heat exchanger channels more than the condensation area of condenser of the first heat exchanger channels, and the disengagement area of the second heat exchanger channels is more than the disengagement area of the second heat exchanger channels.Vaporizer in the above embodiment of the present invention can use various types of vaporizers such as band-tube type, fin tubular type or fin tube type, when being applied to horizontal refrigerator when above-mentioned refrigeration system, it is possible to use light pipe evaporator.In the present embodiment, the second heat exchanger channels has bigger exchange capability of heat than the first heat exchanger channels, it is possible to realizes quick freezing, and uses the first heat exchanger channels, can reduce power consumption.
The control method that the above embodiment of the present invention provides, for realizing quick freezing, by controlling the electromagnetic valve in heat exchanger, it is made to be operated in the first mode of operation, or second mode of operation, during its heat exchanger the second mode of operation again, there is bigger heat exchange area, there is high refrigerating capacity.
Additionally, compressor in the above embodiment of the present invention can also be frequency-changeable compressor, concrete above-mentioned frequency-changeable compressor can be electrodeless frequency-changeable compressor, such electrodeless frequency-changeable compressor can adjust in certain frequency range continuously, it is also possible to for non intelligent, to have several variable frequencies compressor.Now said method also includes:
Controller controls the frequency-changeable compressor operating frequency when the first mode of operation less than controlling the described frequency-changeable compressor operating frequency when the second mode of operation.When being in higher operating frequency, the operation power of compressor and refrigerating capacity can dramatically increase.
Or, above-mentioned refrigeration system also includes that frequency modulator, described frequency modulator are connected with described controller, and said method also includes:
Described controller controls described frequency modulator and is less than when the second mode of operation to the power supply frequency of described compressor to the power supply frequency of described compressor when the first mode of operation.Concrete, common compressor can be suitable for the power supply of two kinds of operating frequencies of 50Hz and 60Hz, and the most above-mentioned frequency modulator can provide the power supply of 50Hz or 60Hz both operating frequencies to compressor.
Controller in the above embodiment of the present invention can be that a mode of operation controls switch, and the instruction of switch acquisition user's input is controlled by this mode of operation, and control described heat exchanger and be operated in the first mode of operation or the second mode of operation, this mode of operation controls switch and is referred to as being a quick-freezing switch, by quick-freezing switch connection, the mode of operation of heat exchanger is adjusted to the second mode of operation, to realize quick freezing, on the contrary, switch off the mode of operation of heat exchanger can also be adjusted to the first mode of operation by quick-freezing, to reduce power consumption.
It addition, in the case of being provided with frequency modulator, it is also possible to quick-freezing switch is connected with frequency modulator, so that when quick-freezing switch connection, controlling frequency modulator can provide the power supply of upper frequency to described compressor.Or quick-freezing switch is connected with frequency-changeable compressor, when quick-freezing switch connection, there is higher operating frequency controlling frequency-changeable compressor
Or, above-mentioned controller includes that mode of operation controls switch and pattern switching temperature controller, described mode of operation controls switch and obtains the instruction of user's input, and control described heat exchanger and switch to the second mode of operation from the first mode of operation, the mode of operation of described heat exchanger is switched to the first mode of operation by the second Working mould when cryogenic temperature reaches preset value detecting by described pattern switching temperature controller.It can be above-mentioned quick-freezing switch that mode of operation therein controls switch, by quick-freezing switch connection, mode of operation can be adjusted to quickly cooling pattern, it is achieved quick freezing.It is additionally provided with pattern switching temperature controller, probe can be arranged in the casing of refrigeration plant by this pattern switching temperature controller, when detecting that cryogenic temperature reaches preset value, by temperature detect switch (TDS) control, mode of operation switches back into the first mode of operation, and the preset value of above-mentioned cryogenic temperature can be set to-18 DEG C.Additionally, it is also conceivable to, in the case of being provided with pattern switching temperature controller, in addition to above-mentioned quick-freezing switch is connected with frequency modulator or frequency-changeable compressor, pattern switching temperature controller can also be connected with frequency modulator or frequency-changeable compressor, so that when detecting that cryogenic temperature reaches preset value, control frequency modulator provides the power supply of lower frequency to described compressor, or controls frequency-changeable compressor with relatively low operating frequency work.
The embodiment of the present invention additionally provides the control circuit of a kind of refrigeration system, Fig. 5 is the structural representation one of the control circuit of refrigeration system in the embodiment of the present invention, as shown in Figure 5, this control circuit includes the first temperature controller 51, the power supply circuits 52 of compressor, mode of operation controls switch 53 and electromagnetic valve 54, first temperature controller 51 therein is connected in compressor power supply circuits 52, the temperature probe of the first temperature controller 51 can be arranged in the casing 6 of refrigeration plant, for controlling to be switched on or switched off the power supply circuits 52 of described compressor according to refrigeration plant the temperature inside the box；Described mode of operation controls switch 53 and is connected in the power supply circuits of described electromagnetic valve 54, for controlling the on off operating mode of described electromagnetic valve 54, the heat exchanger that described electromagnetic valve 54 controls described refrigeration system according to different on off operating mode is operated in the first mode of operation or the second mode of operation, and described heat exchanger has when being operated in the first mode of operation less than the described heat exchanger heat exchange area when the second mode of operation.
The control circuit that the above embodiment of the present invention provides, control switch by mode of operation and can control the on off operating mode of electromagnetic valve, and the heat exchanger that electromagnetic valve controls described refrigeration system according to different on off operating mode is operated in the first mode of operation or the second mode of operation, described heat exchanger has when being operated in the first mode of operation less than the described heat exchanger heat exchange area when the second mode of operation.Allow to control above-mentioned mode of operation and control switch, reach to control the purpose of heat exchange mode of operation, to realize refrigeration system according to different mode of operations, be i.e. capable of fast-refrigerating, power consumption can be reduced again.
Concrete, above-mentioned electromagnetic valve is three-way valve, including input, the first outfan and the second outfan, when described mode of operation controls to switch off, input and described first outfan of described electromagnetic valve are open-minded, described second outfan cuts out, so that the heat exchanger of described refrigeration system is operated in the first mode of operation, when described mode of operation controls switch connection, input and described second outfan of described electromagnetic valve are open-minded, described first outfan cuts out, so that the heat exchanger of described refrigeration system is operated in the second mode of operation.Concrete, may refer to embodiment as shown in Figure 3, when mode of operation controls to switch off, input and described first outfan by electromagnetic valve are open-minded, second outfan cuts out, making first condenser the 31, first electromagnetic valve the 32, first capillary tube 33 and the first vaporizer 34 in heat exchanger form heat exchanger channels, the heat exchange area that now heat exchanger has is less, and the power consumption of refrigeration system is relatively low；And when mode of operation controls switch connection, input and described second outfan of described electromagnetic valve are open-minded, described first outfan cuts out, first condenser the 31, first electromagnetic valve the 32, second capillary tube the 36, second vaporizer 37 and the first vaporizer 34 in heat exchanger is made to form heat exchanger channels, the heat exchange area that now heat exchanger has is relatively big, and the refrigerating speed of refrigeration system is faster.
Additionally, as shown in Figure 4, when described mode of operation controls to switch off, input and described first outfan of described electromagnetic valve are open-minded, described second outfan cuts out, so that the heat exchanger of described refrigeration system is operated in the first mode of operation, cold-producing medium now carries out heat exchange by the first heat exchanger channels 41, there is less heat exchange area, and when input and described second outfan of electromagnetic valve are open-minded, described first outfan cuts out, so that the heat exchanger of described refrigeration system is operated in the second mode of operation, cold-producing medium now carries out heat exchange by the second heat exchanger channels 42, there is bigger heat exchange area.
The control circuit that the above embodiment of the present invention provides, further, frequency conversion control circuit can also be included, this frequency conversion control circuit is connected in described compressor power supply circuits, and controlled on-off control by described mode of operation, it is used for controlling the operating frequency disconnecting or connecting the described compressor of control of switch according to described mode of operation.Such as when the second mode of operation, by arranging this frequency conversion control circuit, the operating frequency of compressor can be improved, so that when needs express delivery is freezed, it is possible to increase cold-producing medium output according to actual needs, improve further the refrigerating capacity of heat exchanger, or when the first mode of operation, when needing to reduce power consumption, reduce the operating frequency of compressor, less cold-producing medium output.
Concrete, as it is shown in figure 5, this frequency conversion control circuit can be a frequency modulator 55, described frequency modulator 55 adjusts to the power supply frequency of described compressor for disconnecting or connecting of switching according to the control of described mode of operation.
Additionally, the compressor that above-mentioned refrigeration system uses can be with frequency-changeable compressor, above-mentioned frequency conversion control circuit includes a frequency-changeable compressor controller, described frequency-changeable compressor controller is operated in different operating frequencies for controlling described frequency-changeable compressor, concrete, above-mentioned frequency-changeable compressor can be electrodeless frequency-changeable compressor, such electrodeless frequency-changeable compressor can adjust in certain operating frequency range continuously, can also be non intelligent, there is the compressor of several Variable Operating Frequencies, frequency-changeable compressor controller can be actually needed the operating frequency controlling frequency-changeable compressor.
In the above embodiment of the present invention, control circuit therein can also arrange multiple relay indicating light, and concrete can arrange power work display lamp 7, compressor operating display lamp 8 and electromagnetic valve work display lamp 9, indicate respectively the duty of each equipment.
Additionally, as shown in Figure 6, above-mentioned control circuit can also include the second temperature controller 56, this second temperature controller 56 is connected on described mode of operation and controls switch and described electromagnetic valve, and described mode of operation controls between switch and frequency conversion control circuit, the temperature probe of the second protractor therein can be arranged in the casing of refrigeration plant, can be specifically casing top, this second temperature controller controls the on off operating mode of described electromagnetic valve for the temperature inside the box according to the refrigeration plant detected, and control the adjustment to described compressor operating frequency of the described frequency conversion control circuit.Concrete, this second temperature controller can be by being arranged on its temperature probe in the casing of refrigeration plant, to detect the temperature of refrigeration plant, if mode of operation controls switch has had been switched on the second mode of operation, i.e. quickly cooling pattern, the temperature that this second temperature controller then can be used to detect refrigeration plant reaches preset value, such as when reaching-18 ° of C, mode of operation is adjusted to the first mode of operation, i.e. storage mode, now the on off operating mode of electromagnetic valve can be adjusted, to reduce the heat exchange area of heat exchanger, or the operating frequency of compressor is adjusted, operating frequency with less compressor.
In the present embodiment, by arranging the second temperature controller, making for fast-refrigerating, after being switched to quick-freezing pattern by freeze switch, the temperature inside the box can be monitored by the second above-mentioned temperature controller, when freezing and making the temperature inside the box be less than certain threshold value, carry out pattern switching automatically, again switch back into storage mode, it is achieved automatically reseting of pattern, the heat exchange area i.e. switching back into heat exchanger is less, and the state that the operating frequency of compressor is relatively low.
Further, above-mentioned control circuit can also further arrange the second temperature controller display lamp 10, for the duty of instruction the second temperature controller.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (16)
1. a control method for refrigeration system, described refrigeration system includes compressor, controller and heat exchanger, and described compressor cold-producing medium of conveying in heat exchanger is compressed, it is characterised in that described method includes:
Controller obtains control instruction；
The heat exchanger that described controller controls described refrigeration system according to described control instruction is operated in the first mode of operation or the second mode of operation, and described heat exchanger has when being operated in the first mode of operation less than the described heat exchanger heat exchange area when the second mode of operation；
nullDescribed heat exchanger includes the first condenser、First electromagnetic valve、First capillary tube、First vaporizer、Second condenser、Second capillary tube and the second vaporizer，The input of described first condenser is connected with the outfan of the compressor of described refrigeration system，The outfan of described first condenser is connected with the input of described first electromagnetic valve，First outfan of described first electromagnetic valve is connected with the input of described first capillary tube，The outfan of described first capillary tube is connected to the input of described first vaporizer，The outfan of described first vaporizer is connected with the input of described compressor，The input of described second condenser is connected with the second outfan of described first electromagnetic valve，The outfan of described second condenser is connected with the input of described second capillary tube，The outfan of described second capillary tube is connected to the input of described second vaporizer，The outfan of described second vaporizer is connected with the input of described compressor；
The described heat exchanger according to the control instruction described refrigeration system of control is operated in the first mode of operation or the second mode of operation includes:
When the described controller described heat exchanger of control is operated in the first mode of operation, open the first outfan of described first electromagnetic valve, close the second outfan of described first electromagnetic valve, and control described heat exchanger when being operated in the second mode of operation, open the second outfan of described first electromagnetic valve, close the first outfan of described first electromagnetic valve.
The control method of refrigeration system the most according to claim 1, it is characterised in that described compressor is frequency-changeable compressor, described method also includes:
Described controller controls the described frequency-changeable compressor operating frequency when the first mode of operation less than the operating frequency when the second mode of operation.
The control method of refrigeration system the most according to claim 1, it is characterised in that described refrigeration system also includes that frequency modulator, described frequency modulator are connected with described controller, and described method also includes:
Described controller controls described frequency modulator and is less than when the second mode of operation to the power supply frequency of described compressor to the power supply frequency of described compressor when the first mode of operation.
The control method of refrigeration system the most according to claim 1, it is characterized in that, described controller is that mode of operation controls switch, and described mode of operation controls switch and obtains the instruction of user's input, and controls described heat exchanger and be operated in the first mode of operation or the second mode of operation.
The control method of refrigeration system the most according to claim 1, it is characterized in that, described controller includes that mode of operation controls switch and pattern switching temperature controller, described mode of operation controls switch and obtains the instruction of user's input, and control described heat exchanger and switch to the second mode of operation from the first mode of operation, the mode of operation of described heat exchanger is switched to the first mode of operation by the second Working mould when the temperature inside the box refrigeration plant being detected reaches preset value by described pattern switching temperature controller.
6. a control method for refrigeration system, described refrigeration system includes compressor, controller and heat exchanger, and described compressor cold-producing medium of conveying in heat exchanger is compressed, it is characterised in that described method includes:
Controller obtains control instruction；
The heat exchanger that described controller controls described refrigeration system according to described control instruction is operated in the first mode of operation or the second mode of operation, and described heat exchanger has when being operated in the first mode of operation less than the described heat exchanger heat exchange area when the second mode of operation；
Described heat exchanger includes that the second electromagnetic valve, the first heat exchanger channels and the second heat exchanger channels, described first heat exchanger channels and the second heat exchanger channels are connected in sequence by condenser, capillary tube and vaporizer；The input of described second electromagnetic valve is connected with the outfan of the compressor of described refrigeration system, first outfan of described second electromagnetic valve is connected with the input of described first heat exchanger channels, the outfan of described first heat exchanger channels is connected with the input of described compressor, second outfan of described second electromagnetic valve is connected with the input of described second heat exchanger channels, and the outfan of described second heat exchanger channels is connected with the input of described compressor；
The described heat exchanger according to the control instruction described refrigeration system of control is operated in the first mode of operation or the second mode of operation includes:
When the described controller described heat exchanger of control is operated in the first mode of operation, open the first outfan of described second electromagnetic valve, close the second outfan of described second electromagnetic valve, and control described heat exchanger when being operated in the second mode of operation, open the second outfan of described second electromagnetic valve, closing the first outfan of described second electromagnetic valve, the heat exchange area of described second heat exchanger channels is more than the heat exchange area of described first heat exchanger channels.
The control method of refrigeration system the most according to claim 6, it is characterised in that described compressor is frequency-changeable compressor, described method also includes:
Described controller controls the described frequency-changeable compressor operating frequency when the first mode of operation less than the operating frequency when the second mode of operation.
The control method of refrigeration system the most according to claim 6, it is characterised in that described refrigeration system also includes that frequency modulator, described frequency modulator are connected with described controller, and described method also includes:
Described controller controls described frequency modulator and is less than when the second mode of operation to the power supply frequency of described compressor to the power supply frequency of described compressor when the first mode of operation.
The control method of refrigeration system the most according to claim 6, it is characterized in that, described controller is that mode of operation controls switch, and described mode of operation controls switch and obtains the instruction of user's input, and controls described heat exchanger and be operated in the first mode of operation or the second mode of operation.
The control method of refrigeration system the most according to claim 6, it is characterized in that, described controller includes that mode of operation controls switch and pattern switching temperature controller, described mode of operation controls switch and obtains the instruction of user's input, and control described heat exchanger and switch to the second mode of operation from the first mode of operation, the mode of operation of described heat exchanger is switched to the first mode of operation by the second Working mould when the temperature inside the box refrigeration plant being detected reaches preset value by described pattern switching temperature controller.
The control circuit of 11. 1 kinds of refrigeration systems, it is characterised in that include that the first temperature controller, the power supply circuits of compressor, mode of operation control switch and electromagnetic valve；
Described first temperature controller is connected in the power supply circuits of described compressor, for controlling to be switched on or switched off the power supply circuits of described compressor according to refrigeration plant the temperature inside the box；
Described mode of operation controls switch series and is associated in the power supply circuits of described electromagnetic valve, for controlling the on off operating mode of described electromagnetic valve, the heat exchanger that described electromagnetic valve controls described refrigeration system according to different on off operating mode is operated in the first mode of operation or the second mode of operation, and described heat exchanger has when being operated in the first mode of operation less than the described heat exchanger heat exchange area when the second mode of operation.
The control circuit of 12. refrigeration systems according to claim 11, it is characterised in that described electromagnetic valve is three-way valve, including input, the first outfan and the second outfan；
When described mode of operation controls to switch off, input and described first outfan of described electromagnetic valve are open-minded, described second outfan cuts out, so that the heat exchanger of described refrigeration system is operated in the first mode of operation, when described mode of operation controls switch connection, input and described second outfan of described electromagnetic valve are open-minded, and described first outfan cuts out, so that the heat exchanger of described refrigeration system is operated in the second mode of operation.
13. according to the control circuit of the refrigeration system described in claim 11 or 12, it is characterized in that, also include frequency conversion control circuit, described frequency conversion control circuit is connected in described compressor power supply circuits, and controlled on-off control by described mode of operation, it is used for controlling the operating frequency disconnecting or connecting the described compressor of control of switch according to described mode of operation.
The control circuit of 14. refrigeration systems according to claim 13, it is characterized in that, described frequency conversion control circuit includes a frequency modulator, and described frequency modulator adjusts to the power supply frequency of described compressor for the disconnection or connection controlling switch according to described mode of operation.
The control circuit of 15. refrigeration systems according to claim 13, it is characterized in that, described compressor is frequency-changeable compressor, and described frequency conversion control circuit includes a frequency-changeable compressor controller, and described frequency-changeable compressor controller is operated in different operating frequencies for controlling described frequency-changeable compressor.
The control circuit of 16. refrigeration systems according to claim 13, it is characterized in that, also include the second temperature controller, described second temperature controller is connected on described mode of operation and controls switch and described electromagnetic valve, and described mode of operation controls between switch and frequency conversion control circuit, control the on off operating mode of described electromagnetic valve for the temperature inside the box according to the refrigeration plant detected, and control the adjustment to described compressor operating frequency of the described frequency conversion control circuit.
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| CN101696831B (en) * | 2009-10-21 | 2012-10-03 | 合肥华凌股份有限公司 | Mechanical temperature-control refrigerating system for improving refrigerating capability of direct-cool refrigerator and control method thereof |
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