CN204574320U - With naturally cold multi-connection refrigeration system - Google Patents
With naturally cold multi-connection refrigeration system Download PDFInfo
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- CN204574320U CN204574320U CN201520135554.2U CN201520135554U CN204574320U CN 204574320 U CN204574320 U CN 204574320U CN 201520135554 U CN201520135554 U CN 201520135554U CN 204574320 U CN204574320 U CN 204574320U
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Abstract
The utility model discloses the cold multi-connection refrigeration system of band nature, this system comprises at least one indoor refrigeration unit, at least one outdoor refrigeration unit and the cold supply unit for refrigeration unit in junction chamber and outdoor refrigeration unit; The delivery pump that cold supply unit comprises the device for storing liquid for storing refrigerant and is connected with device for storing liquid; Outdoor refrigeration unit comprises wall-type heat exchange unit, and wall-type heat exchange unit comprises separate the first heat exchange pipeline and the second heat exchange pipeline for carrying out exchange heat; Outdoor refrigeration unit also comprises compressor, condensing unit, refrigerated medium pump and the second control part, and indoor refrigeration unit comprises first flow control valve, indoor evaporator and the first control part; Indoor refrigeration unit, cold supply unit and the first heat exchange pipeline form closed circulation.The naturally cold multi-connection refrigeration system heat exchange efficiency of this band is high, structure simple and its Systematical control is simply more convenient, effectively can avoid energy waste.
Description
Technical field
The utility model relates to field of refrigeration, particularly relates to a kind of with naturally cold multi-connection refrigeration system.
Background technology
Current multi-connection refrigeration system, especially be applied in the multi-joint refrigeration unit of computer floor, data center etc., as cooling by wind, water cooled chiller, all adopt compressor as the refrigeration system of refrigeration power, when outdoor temperature is lower, the Energy Efficiency Ratio of compressor refrigeration system is lower, easily causes energy waste, can not meet the requirement that national energy-saving reduces discharging.And the volume of current indoor machine is comparatively large, Energy Efficiency Ratio is low, can not meet the demand of user well.
Utility model content
The technical problems to be solved in the utility model is, for the defect of prior art, provides the multi-connection refrigeration system that a kind of band of improvement is naturally cold.
The utility model solves the technical scheme that its technical problem adopts: a kind of with naturally cold multi-connection refrigeration system, comprises at least one indoor refrigeration unit, at least one outdoor refrigeration unit and the cold supply unit for connecting described indoor refrigeration unit and described outdoor refrigeration unit;
The delivery pump that described cold supply unit comprises the device for storing liquid for storing refrigerant and is connected with described device for storing liquid;
Described outdoor refrigeration unit comprises wall-type heat exchange unit, and described wall-type heat exchange unit comprises separate the first heat exchange pipeline and the second heat exchange pipeline for carrying out exchange heat; Described indoor refrigeration unit, described cold supply unit and described first heat exchange pipeline form closed circulation;
Described indoor refrigeration unit comprises the first flow control valve exporting with described delivery pump and be connected, the indoor evaporator be connected with described first heat exchange pipeline entrance is exported with described first flow control valve, and first control part, described first control part is connected with described delivery pump with described first flow control valve respectively, for controlling the start and stop of described first flow control valve and described delivery pump according to indoor refrigeration demand, the aperture of described first flow control valve is controlled according to the indoor outlet superheat degree of described indoor evaporator, the volume output of described delivery pump is controlled according to the pressure difference before and after described delivery pump.
Described outdoor refrigeration unit also comprises and exports with described second heat exchange pipeline the compressor be connected, the condensing unit be connected with described compressor outlet, the refrigerated medium pump exported with described condensing unit, the second control valve and the second control part that are connected with described second heat exchange pipeline entrance is exported with described refrigerated medium pump, described second control part respectively with described compressor, described second control valve, described condensing unit is connected with described refrigerated medium pump, for controlling start and stop or the volume output of described compressor according to outdoor refrigeration demand, the first outlet pressure exported according to described condensing unit and/or the first outlet temperature control the volume output of described condensing unit, the aperture of described second control valve is controlled according to the outdoor outlet superheat degree of described second heat exchange pipeline, and the volume output of described refrigerated medium pump is controlled according to the aperture of described second control valve.
Preferably, at least one indoor refrigeration unit described comprises at least two the indoor refrigeration units be arranged in parallel.
Preferably, also comprise the indoor fan coordinated with indoor evaporator, described first control part is connected with described indoor fan, for controlling aperture or the volume output of described indoor fan according to described indoor refrigeration demand.
Preferably, described indoor refrigeration unit also comprises the second stop valve of the first stop valve and the described indoor evaporator outlet being arranged on described first flow control valve entrance.
Preferably, described outdoor refrigeration unit comprises at least two the outdoor refrigeration units be arranged in series, and the first heat exchange pipeline of described at least two outdoor refrigeration units is connected.
Preferably, described outdoor refrigeration unit comprises at least two the outdoor refrigeration units be arranged in parallel, described at least two outdoor refrigeration units share second control valve described in wall-type heat exchange unit and described in, at least two compressor parallels of described at least two outdoor refrigeration units access the second heat exchange pipeline outlet of described wall-type heat exchange unit, at least two compressor outlets and described second control valve entrance described at least two condensing unit parallel connection accesses.
Preferably, described outdoor refrigeration unit comprises at least two the outdoor refrigeration units be arranged in parallel, and described device for storing liquid is connected respectively in the first heat exchange pipeline outlet of described at least two outdoor refrigeration units.
Preferably, described condensing unit comprises the outdoor fan being connected to the outdoor condenser between described compressor with described second control valve and coordinating with described outdoor condenser, described second control part is connected with described outdoor fan, for controlling the volume output of described outdoor fan according to the first outlet pressure of described outdoor condensator outlet and/or the first outlet temperature.
Preferably, described condensing unit comprises the outdoor condenser be connected between described compressor with described second control valve and the cooling water output device coordinated with described outdoor condenser, and described second control part controls the volume output of described cooling water output device.
Preferably, described first control part and described second control part are connected by communication, and described second control part controls the start and stop of described second control part according to the described indoor refrigeration demand that the first control part transmits.
The utility model compared with prior art tool has the following advantages: the multi-connection refrigeration system employing compressor that band provided by the utility model is naturally cold and refrigerated medium pump, as refrigeration power, effectively can improve refrigeration efficiency, to avoid energy waste; And by adopting wall-type heat exchange unit to carry out heat exchange to indoor refrigeration unit and outdoor refrigeration unit, heat exchange efficiency is high, heat loss is little, advantages of compact and light structure, floor space are little; In addition, the indoor refrigeration unit of the multi-connection refrigeration system that this band is naturally cold only comprises indoor evaporator and first flow control valve and the first control part, its small volume.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structural representation with naturally cold multi-connection refrigeration system in the utility model embodiment 1.
Fig. 2 is another structural representation with naturally cold multi-connection refrigeration system in the utility model embodiment 1.
Fig. 3 is another structural representation with naturally cold multi-connection refrigeration system in the utility model embodiment 1.
Fig. 4 is another structural representation with naturally cold multi-connection refrigeration system in the utility model embodiment 1.
Fig. 5 is a flow chart of the control method with naturally cold multi-connection refrigeration system in the utility model embodiment 2.
Fig. 6 is the flow chart of step S12 in Fig. 5.
Fig. 7 is the flow chart of step S13 in Fig. 5.
Fig. 8 is the flow chart of step S14 in Fig. 5.
Fig. 9 is the flow chart of step S22 in Fig. 5.
Figure 10 is the flow chart of step S23 in Fig. 5.
Figure 11 is the flow chart of step S24 in Fig. 5.
Figure 12 is the flow chart of step S25 in Fig. 5.
In figure: 10, indoor refrigeration unit; 11, first flow control valve; 12, indoor evaporator; 13, the first control part; 14, indoor fan; 15, the first stop valve; 16, the second stop valve; 20, outdoor refrigeration unit; 21, wall-type heat exchange unit; 211, the first heat exchange pipeline; 212, the second heat exchange pipeline; 22, compressor; 23, condensing unit; 231, outdoor condenser; 232, outdoor fan; 233, cooling water output device; 24, second control valve; 25, the second control part; 26, refrigerated medium pump; 30, cold supply unit; 31, device for storing liquid; 32, delivery pump.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and describe detailed description of the invention of the present utility model in detail.
Embodiment 1
Fig. 1-Fig. 4 illustrates the multi-connection refrigeration system that the band in the present embodiment is naturally cold, and the naturally cold multi-connection refrigeration system of this band comprises at least one indoor refrigeration unit 10, at least one outdoor refrigeration unit 20 and the cold supply unit 30 for refrigeration unit in junction chamber 10 and outdoor refrigeration unit 20.Particularly, at least one indoor refrigeration unit 10 comprises at least two the indoor refrigeration units 10 be arranged in parallel.Understandably, at least two indoor refrigeration units 10 are arranged in parallel, and make to be independent of each other between indoor refrigeration unit 10; The number of each indoor refrigeration unit 10 is determined according to user's request, and the number of outdoor refrigeration unit 20 is determined according to the refrigeration demand needed for indoor refrigeration unit 10.
As Figure 1-Figure 4, cold supply unit 30 delivery pump 32 that comprises the device for storing liquid 31 for storing refrigerant and be connected with device for storing liquid 31.Understandably, refrigerant can be the liquid phase-change refrigerant such as fluorine Lyons, its under low-temperature condition in evaporation process to indoor absorption heat (i.e. refrigerating capacity).Understandably, phase change refrigerant utilizes the principle of liquid evaporation endothermic, and carry out compared with cold carries with adopting cooling water in air-cooled or water chiller, its heat exchange efficiency is higher, and required circulating mass of refrigerant is lower, without the need to the delivery pump 32 of higher-wattage.Experiment proves, adopt phase change refrigerant conveying cold, can carry cold 214 kilojoule, the unit of 100kW refrigerating capacity for every kilogram, the internal circulating load of cold-producing medium only needs to reach 1.687 tons/hour, and the power of its delivery pump 32 only needs 1.1kW.
As shown in Figure 1-Figure 3, outdoor refrigeration unit 20 comprises wall-type heat exchange unit 21, and wall-type heat exchange unit 21 comprises separate the first heat exchange pipeline 211 and the second heat exchange pipeline 212 for carrying out exchange heat.Understandably, this wall-type heat exchange unit 21 can be plate-type heat-exchange unit, plate-type heat-exchange unit carries out the visual plant of heat exchange as liquid-liquid, liquid-vapour, there is heat exchange efficiency high, heat loss is little, advantages of compact and light structure, floor space are little, easy to clean is installed, be widely used and the feature such as long service life.
As Figure 1-Figure 4, indoor refrigeration unit 10, cold supply unit 30 and the first heat exchange pipeline 211 form closed circulation.Particularly, indoor refrigeration unit 10 comprise to export with delivery pump 32 be connected first flow control valve 11, export with first flow control valve 11 indoor evaporator 12 and the first control part 13 that are connected with the first heat exchange pipeline 211 entrance.First control part 13 is connected with delivery pump 32 with first flow control valve 11 respectively, for controlling the start and stop of first flow control valve 11 and delivery pump 32 according to indoor refrigeration demand, control the aperture of first flow control valve 11 according to the indoor outlet superheat degree of indoor evaporator 12, control the volume output of delivery pump 32 according to the pressure difference before and after delivery pump 32.
Understandably, the phase change refrigerant being stored in the liquid state in device for storing liquid 31 is delivered to indoor evaporator 12 under delivery pump 32 acts on, under indoor evaporator 12 acts on, evaporation endothermic converts the phase change refrigerant of steam state to, with to providing the cold of meeting consumers' demand; Steam state phase change refrigerant flows through the first heat exchange pipeline 211 of wall-type heat exchange unit 21, carry out exchange heat by the first heat exchange pipeline 211 and the second heat exchange pipeline 212, make the phase change refrigerant of steam state convert liquid phase change refrigerant to and be delivered to device for storing liquid 31.
As Figure 1-Figure 4, indoor refrigeration unit 10 also comprises indoor fan 14, first control part 13 coordinated with indoor evaporator 12 and is connected with indoor fan 14, for according to the aperture of indoor refrigeration demand control room inner blower 14 or volume output.Understandably, adopt the indoor fan 14 coordinated with indoor evaporator 12, to improve the evaporation efficiency of indoor evaporator 12, and then improve the heat exchange efficiency of indoor refrigeration unit 10.
Understandably, indoor refrigeration unit 10 also comprises the second stop valve 16 (as Figure 1-Figure 4) of the first stop valve 15 and indoor evaporator 12 outlet being arranged on first flow control valve 11 entrance, by the setting of the first stop valve 15 and the second stop valve 16, be convenient to the independent multi-connection refrigeration system controlling arbitrary indoor refrigeration unit 10 access and be with nature cold, better meet the user demand of user.
Outdoor refrigeration unit 20 also comprises and exports with the second heat exchange pipeline 212 compressor 22 be connected, the condensing unit 23 be connected is exported with compressor 22, the refrigerated medium pump 26 be connected is exported with condensing unit 23, the second control valve 24 and the second control part 25 that are connected with the second heat exchange pipeline 212 entrance is exported with refrigerated medium pump 26, second control part 25 respectively with compressor 22, second control valve 24, condensing unit 23 is connected with refrigerated medium pump 26, for controlling start and stop or the volume output of compressor 22 according to outdoor refrigeration demand, the first outlet pressure exported according to condensing unit 23 and/or the first outlet temperature control the volume output of condensing unit 23, the aperture of second control valve 24 is controlled according to the outdoor outlet superheat degree of the second heat exchange pipeline 212, and the volume output of refrigerated medium pump 26 is controlled according to the aperture of second control valve 24.Understandably, outdoor refrigeration unit 20 adopts compressor 22 and refrigerated medium pump 26 as refrigeration power, effectively can improve refrigeration efficiency, and to avoid energy waste, especially comparatively low in outdoor temperature, the refrigeration efficiency of compressor 22 is low.
Understandably, the steam state refrigerant being placed in outdoor refrigeration unit 20 circulating line heat release convert liquid refrigerants under the condensation of compressor 22 and condensing unit 23, liquid refrigerants absorbs heat and carries out liquid state to liquid conversion in the second heat exchange pipeline 212 of wall-type heat exchange unit 21, and exports steam state refrigerant to compressor 22 and condensing unit 23.Understandably, carry out vapour-liquid conversion and liquid-vapour conversion respectively in the first heat exchange pipeline 211 of wall-type heat exchange unit 21 and the second heat exchange pipeline 212, its heat exchange efficiency is high, and heat loss is less.
As Figure 1-Figure 4, first control part 13 and the second control part 25 are connected by communication, second control part 25 controls the start and stop of the second control part 25 according to the indoor refrigeration demand that the first control part 13 transmits, i.e. refrigeration demand in the real-time sensing chamber of the first control part 13, to control the start and stop of first flow control valve 11 and delivery pump 32, if first flow control valve 11 and delivery pump 32 start and stop, then corresponding control second control part 25 starts, with refrigeration demand outside sensing chamber, the first outlet pressure that condensing unit 23 exports and/or the first outlet temperature, with the outdoor outlet superheat degree of the second heat exchange pipeline 212, to control compressor 22 respectively, condensing unit 23 and second control valve 24.
Understandably, be arranged at outdoor condensing unit 23 and can adopt air-cooled unit (as shown in Figure 1-Figure 3), its condensing unit 23 comprises the outdoor fan 232 being connected to the outdoor condenser 231 between compressor 22 with second control valve 24 and coordinating with outdoor condenser 231, second control part 25 is connected with outdoor fan 232, controls the volume output of outdoor fan 232 for the first outlet pressure of exporting according to outdoor condenser 231 and/or the first outlet temperature.
Understandably, be placed in outdoor condensing unit 23 and can also adopt water chiller (as shown in Figure 4), its condensing unit 23 comprises the volume output of the outdoor condenser 231 be connected between compressor 22 with second control valve 24 and cooling water output device 233, the second control part 25 controlled cooling model water output device 233 coordinated with outdoor condenser 231.
As shown in Figure 1, outdoor refrigeration unit 20 can comprise at least two the outdoor refrigeration units 20 be arranged in series, first heat exchange pipeline 211 of at least two outdoor refrigeration units 20 is connected, with to flow through at least two the second heat exchange pipelines 212 phase change refrigerant carry out multi-stage condensing, to make its condensation efficiency better, and then improve the heat exchange efficiency of the cold multi-connection refrigeration system of band nature.
As shown in Figure 2, outdoor refrigeration unit 20 can comprise at least two the outdoor refrigeration units 20 be arranged in parallel, at least two outdoor refrigeration units 20 share wall-type heat exchange unit 21 and a second control valve 24, second heat exchange pipeline 212 of at least two compressors 22 parallel connection access heat exchange unit of at least two outdoor refrigeration units 20 exports, and at least two condensing unit 23 parallel connection accesses at least two compressors 22 export and second control valve 24 entrance.The mode that at least two outdoor refrigeration units 20 adopt compressor 22 as shown in Figure 2 and condensing unit 23 to be arranged in parallel respectively, effectively can accelerate the condensation efficiency of outdoor refrigeration unit 20, and then the evaporation efficiency accelerated in the second heat exchange pipeline 212, improve the heat exchange efficiency of the second heat exchange pipeline 212 and the first heat exchange pipeline 211.
As shown in Figure 3, outdoor refrigeration unit 20 comprises at least two the outdoor refrigeration units 20 be arranged in parallel, and the first heat exchange pipeline 211 of at least two outdoor refrigeration units 20 exports device for storing liquid 31 respectively and is connected.Understandably, at least two outdoor refrigeration units 20 adopt connected mode as shown in Figure 3, make each outdoor refrigeration unit 20 carry out heat exchange with at least two outdoor refrigeration units 20 and be independent of each other, ensure the heat exchange efficiency of each outdoor refrigeration unit 20 and at least two indoor refrigeration units 10.
Embodiment 2
Fig. 5 illustrates the control method of the multi-connection refrigeration system that the band in the present embodiment is naturally cold, and this control method comprises the following steps that the first control part 13 performs:
Pressure difference Δ P before and after the indoor outlet superheat degree SHr1 of the indoor refrigeration demand CFr1 of the S11: the first control part 13 Real-time Obtaining, indoor evaporator 12 and delivery pump 32.Particularly, step S11 comprises: indoor environment temperature T1 and the first preset temperature value Tset1 by gathering indoor environment temperature T1, and compares by the acquisition of indoor refrigeration demand CFr1, and both calculating temperature gap is as indoor refrigeration demand CFr1.The determination of the indoor outlet superheat degree SHr1 of indoor evaporator 12, by gathering the second outlet temperature T2 and/or the second outlet pressure P1 of indoor evaporator 12 outlet, carries out according to degree of superheat computing formula the indoor outlet superheat degree SHr1 calculating to determine indoor evaporator 12.Particularly, export the second outlet pressure P1 of 2 the second outlet temperature T2 or two by gathering indoor evaporator 12 or gather the second outlet temperature T2 and the second outlet pressure P1 of any point simultaneously, all can calculate the indoor outlet superheat degree SHr1 of indoor evaporator 12.The determination of the pressure difference Δ P before and after delivery pump 32, by gathering pump inlet pressure P2 and the pump discharge pressure P3 of delivery pump 32, calculates the pressure difference Δ P obtained before and after delivery pump 32.
S12: the first control part 13 controls the start and stop of first flow control valve 11 and delivery pump 32 according to indoor refrigeration demand CFr1.As shown in Figure 6, step S12 comprises the steps: that indoor refrigeration demand CFr1 and the first threshold value CFset1 that freezes that presets compares by the first control part 13, if indoor refrigeration demand CFr1 is more than or equal to the first refrigeration threshold value CFset1, then control first flow control valve 11 and delivery pump 32 start, if not, then control first flow control valve 11 and delivery pump 32 quit work.Namely when the indoor refrigeration demand CFr1 only calculated is greater than the second refrigeration threshold value CFset1, just need refrigeration unit 10 in control room to freeze, and then control first flow control valve 11 and delivery pump 32 starts; Indoor refrigeration demand CFr1 is larger, and show that its refrigeration exports requirement larger, the aperture Xr1 of first flow control valve 11 and the volume output of delivery pump 32 need adjust accordingly.
And/or
S13: the first control part 13 controls the aperture Xr1 of first flow control valve 11 according to the indoor outlet superheat degree SHr1 of indoor evaporator 12.As shown in Figure 7, step S13 comprises the steps: that indoor outlet superheat degree SHr1 compares with the first degree of superheat threshold range SHset1 preset by the first control part 13, if indoor outlet superheat degree SHr1 is less than the first degree of superheat threshold range SHset1, then reduce the aperture Xr1 of first flow control valve 11.If indoor outlet superheat degree SHr1 is greater than the first degree of superheat threshold range SHset1, then increase the aperture Xr1 of first flow control valve 11.If indoor outlet superheat degree SHr1 is within the first degree of superheat threshold range SHset1, then maintain the aperture Xr1 of first flow control valve 11.
And/or
S14: the first control part 13 controls the volume output of delivery pump 32 according to the pressure difference Δ P before and after delivery pump 32.As shown in Figure 8, step S14 comprises: pressure difference Δ P compares with the threshold pressure differential scope Pset preset by the first control part 13, if pressure difference Δ P is less than threshold pressure differential scope Pset, then reduces the volume output of delivery pump 32.If pressure difference Δ P is greater than threshold pressure differential scope Pset, then increase the volume output of delivery pump 32; If pressure difference Δ P is within threshold pressure differential scope Pset, then maintain the volume output of delivery pump 32.
Understandably, the mutual control of the first control part 13 pairs delivery pump 32 and first flow control valve 11 is independent of each other, and namely between the two without sequencing, independently controls according to respective controlled condition.Particularly, the first control part 13 adopts PID control method or P control method to control delivery pump 32 and first flow control valve 11.
The control method of the multi-connection refrigeration system that this band is naturally cold also comprises the following steps of the second control part 25 execution:
S21: determine the outdoor outlet superheat degree SHr2 of the first outlet pressure P4 that outdoor refrigeration demand CFr2, condensing unit 23 export and/or the first outlet temperature T3 and the second heat exchange pipeline 212 and aperture Xr2 of second control valve 24.
Described step S21 comprises: the 3rd outlet temperature T4 that outdoor refrigeration demand CFr2 is exported by collection first heat exchange pipeline 211, the 3rd outlet pressure P5, the first inlet pressure P6 or the first inlet temperature T5, and the 3rd outlet temperature T4, the 3rd outlet pressure P5, the first inlet pressure P6 or the first inlet temperature T6 and the second preset temperature value Tset2 are calculated, to obtain outdoor refrigeration demand CFr2.Gather the first outlet pressure P4 and/or the first outlet temperature T3 of condensing unit 23 outlet.The 4th outlet temperature T6 and/or the 4th outlet pressure P7 of the outlet of collection first heat exchange pipeline 211 are passed through in the determination of the outdoor outlet superheat degree SHr2 of the second heat exchange pipeline 212, carry out according to degree of superheat computing formula the outdoor outlet superheat degree Shr2 calculating to determine the second heat exchange pipeline 212.Particularly, the 4th outlet pressure P6 of 2 the 4th outlet temperature T6 or two is exported by gathering the second heat exchange pipeline 212, or gather the 4th outlet temperature T6 and the 4th outlet pressure P7 of any point simultaneously, all can calculate outdoor outlet superheat degree SHr2.
S22: the second control part 25 controls start and stop or the volume output of compressor 22 according to outdoor refrigeration demand CFr2.As shown in Figure 9, step S22 comprises the steps: outdoor refrigeration demand CFr2 and the second threshold value CFset2 that freezes that presets to compare, if outdoor refrigeration demand CFr2 is greater than the second refrigeration threshold value CFset2, then control to start compressor 22 and the volume output adjusting compressor 22, if not, then control compressor 22 to quit work.
And/or
The first outlet pressure P4 that S23: the second control part 25 exports according to condensing unit 23 and/or the first outlet temperature T3 controls the volume output of condensing unit 23.As shown in Figure 10, step S23 comprises the steps: that the first outlet temperature T3 is changed into corresponding exit pressure levels by calculating by the second control part 25, and the exit pressure levels of correspondence or the first outlet pressure P4 is compared with the pressure threshold scope Pset1 preset.If the exit pressure levels of correspondence or the first outlet pressure P4 are greater than pressure threshold scope, then increase the volume output of condensing unit 23.If the exit pressure levels of correspondence or the first outlet pressure P4 are less than pressure threshold scope Pset1, then reduce the volume output of condensing unit 23.If the exit pressure levels of correspondence or the first outlet pressure P4 are within pressure threshold scope Pset1, then maintain the volume output of condensing unit 23.
Understandably, if condensing unit 23 adopts air-cooled unit, namely condensing unit 23 comprises the outdoor fan 232 being connected to the outdoor condenser 231 between compressor 22 with second control valve 24 and coordinating with outdoor condenser 231, then the second control part 25 can control the volume output of outdoor fan 232 according to the first outlet pressure P4 of outdoor condenser 231 outlet and/or the first outlet temperature T3, namely controls the rotating speed of outdoor fan 232.
If condensing unit 23 adopts water chiller, condensing unit 23 comprises the outdoor condenser 231 be connected between compressor 22 with second control valve 24 and the cooling water output device 233 coordinated with outdoor condenser 231, then the second control part 25 can control the volume output of controlled cooling model water output device 233 according to the first outlet pressure P4 of outdoor condenser 231 outlet and/or the first outlet temperature T3.
And/or
S24: the aperture Xr2 controlling second control valve 24 according to the outdoor outlet superheat degree SHr2 of the second heat exchange pipeline 212.As shown in figure 11, step S24 comprises the steps: that outdoor outlet superheat degree SHr2 compares with the second degree of superheat threshold range SHset2 preset by the second control part 25, if outdoor outlet superheat degree SHr2 is less than the second degree of superheat threshold range SHset2, then reduce the aperture Xr2 of second control valve 24.If outdoor outlet superheat degree SHr2 is greater than the second degree of superheat threshold range SHset2, then increase the aperture Xr2 of second control valve 24.If outdoor outlet superheat degree SHr2 is within the second degree of superheat threshold range SHset2, then maintain the aperture Xr2 of second control valve 24.
And/or
S25: the second control part 25 controls the volume output of refrigerated medium pump 26 according to the aperture Xr2 of second control valve 24.As shown in figure 12, step S25 comprises the steps: the aperture Xr2 of second control valve 24 to compare with the aperture threshold range Xset1 preset, if the aperture Xr2 of second control valve 24 is less than aperture threshold range Xset1, then reduce the volume output of refrigerated medium pump 26; If the aperture Xr2 of second control valve 24 is greater than aperture threshold range Xset1, then increase the volume output of refrigerated medium pump 26; If the aperture Xr2 of second control valve 24 is within aperture threshold range Xset1, then maintain the volume output of refrigerated medium pump 26.
Understandably, the control of the second control part 25 pairs second control valve 24, condensing unit 23 and compressor 22 is independent of each other, and namely between the two without sequencing, independently controls according to respective controlled condition.Particularly, the second control part 25 adopts PID control method or P control method to control second control valve 24, condensing unit 23 and compressor 22.
The control method of the multi-connection refrigeration system that band provided by the utility model is naturally cold, pressure difference Δ P before and after first control part 13 Real-time Obtaining indoor refrigeration demand CFr1, indoor outlet superheat degree SHr1 and delivery pump 32, and independent control first flow control valve 11 and delivery pump 32; The outdoor refrigeration demand CFr2 of second control part 25 Real-time Obtaining, the first outlet pressure P4 of condensing unit 23 outlet and/or the aperture Xr2 of the first outlet temperature T3, outdoor outlet superheat degree SHr2 and second control valve 24, and the independent aperture controlling compressor 22, condensing unit 23, second control valve 24 and compressor 26; This control method adopts compressor and refrigerated medium pump as refrigeration power in outdoor refrigeration unit 20, effectively can improve refrigeration efficiency, and this control method is simply easy to realize, and to being with the corresponding component of the cold multi-connection refrigeration system of nature independently to control, control to avoid multiple part relation to cause energy waste.
The utility model is described by several specific embodiment, it will be appreciated by those skilled in the art that, when not departing from the utility model scope, can also carry out various conversion and be equal to substituting to the utility model.In addition, for particular condition or concrete condition, various amendment can be made to the utility model, and not depart from scope of the present utility model.Therefore, the utility model is not limited to disclosed specific embodiment, and should comprise the whole embodiments fallen in the utility model right.
Claims (10)
1. one kind with naturally cold multi-connection refrigeration system, it is characterized in that, comprising at least one indoor refrigeration unit (10), at least one outdoor refrigeration unit (20) and the cold supply unit (30) for connecting described indoor refrigeration unit (10) and described outdoor refrigeration unit (20);
The delivery pump (32) that described cold supply unit (30) comprises the device for storing liquid (31) for storing refrigerant and is connected with described device for storing liquid (31);
Described outdoor refrigeration unit (20) comprises wall-type heat exchange unit (21), and described wall-type heat exchange unit (21) comprises separate the first heat exchange pipeline (211) and the second heat exchange pipeline (212) for carrying out exchange heat; Described indoor refrigeration unit (10), described cold supply unit (30) and described first heat exchange pipeline (211) form closed circulation;
Described indoor refrigeration unit (10) comprises the first flow control valve (11) exporting with described delivery pump (32) and be connected, the indoor evaporator (12) be connected with described first heat exchange pipeline (211) entrance is exported with described first flow control valve (11), and first control part (13), described first control part (13) is connected with described delivery pump (32) with described first flow control valve (11) respectively, for controlling the start and stop of described first flow control valve (11) and described delivery pump (32) according to indoor refrigeration demand, the aperture of described first flow control valve (11) is controlled according to the indoor outlet superheat degree of described indoor evaporator (12), the volume output of described delivery pump (32) is controlled according to the pressure difference before and after described delivery pump (32),
Described outdoor refrigeration unit (20) also comprises and exports with described second heat exchange pipeline (212) compressor (22) be connected, the condensing unit (23) be connected is exported with described compressor (22), the refrigerated medium pump (26) be connected is exported with described condensing unit (23), the second control valve (24) and the second control part (25) that are connected with described second heat exchange pipeline (212) entrance is exported with described refrigerated medium pump (26), described second control part (25) respectively with described compressor (22), described second control valve (24), described condensing unit (23) is connected with described refrigerated medium pump (26), for controlling start and stop or the volume output of described compressor (22) according to outdoor refrigeration demand, the first outlet pressure exported according to described condensing unit (23) and/or the first outlet temperature control the volume output of described condensing unit (23), the aperture of described second control valve (24) is controlled according to the outdoor outlet superheat degree of described second heat exchange pipeline (212), and the volume output of described refrigerated medium pump (26) is controlled according to the aperture of described second control valve (24).
2. the multi-connection refrigeration system that band according to claim 1 is naturally cold, is characterized in that, at least one indoor refrigeration unit (10) described comprises at least two the indoor refrigeration units (10) be arranged in parallel.
3. the multi-connection refrigeration system that band according to claim 2 is naturally cold, it is characterized in that, also comprise the indoor fan (14) coordinated with indoor evaporator (12), described first control part (13) is connected with described indoor fan (14), for controlling aperture or the volume output of described indoor fan (14) according to described indoor refrigeration demand.
4. the multi-connection refrigeration system that band according to claim 2 is naturally cold, it is characterized in that, described indoor refrigeration unit (10) also comprises the second stop valve (16) that the first stop valve (15) of being arranged on described first flow control valve (11) entrance and described indoor evaporator (12) export.
5. the multi-connection refrigeration system that the band according to any one of claim 1-4 is naturally cold, it is characterized in that, described outdoor refrigeration unit (20) comprises at least two the outdoor refrigeration units (20) be arranged in series, and first heat exchange pipeline (211) of described at least two outdoor refrigeration units (20) is connected.
6. the multi-connection refrigeration system that the band according to any one of claim 1-4 is naturally cold, it is characterized in that, described outdoor refrigeration unit (20) comprises at least two the outdoor refrigeration units (20) be arranged in parallel, described at least two outdoor refrigeration units (20) share wall-type heat exchange unit (21) and second control valve (24) described in described in, second heat exchange pipeline (212) outlet of the described wall-type heat exchange unit (21) of at least two compressors (22) parallel connection access of described at least two outdoor refrigeration units (20), at least two compressor (22) outlets and described second control valve (24) entrance described at least two condensing unit (23) parallel connection accesses.
7. the multi-connection refrigeration system that the band according to any one of claim 1-4 is naturally cold, it is characterized in that, described outdoor refrigeration unit (20) comprises at least two the outdoor refrigeration units (20) be arranged in parallel, and the first heat exchange pipeline (211) outlet of described at least two outdoor refrigeration units (20) is connected with described device for storing liquid (31) respectively.
8. the multi-connection refrigeration system that the band according to any one of claim 1-4 is naturally cold, it is characterized in that, described condensing unit (23) comprises the outdoor fan (232) being connected to the outdoor condenser (231) between described compressor (22) with described second control valve (24) and coordinating with described outdoor condenser (231), described second control part (25) is connected with described outdoor fan (232), the volume output of described outdoor fan (232) is controlled for the first outlet pressure of exporting according to described outdoor condenser (231) and/or the first outlet temperature.
9. the multi-connection refrigeration system that the band according to any one of claim 1-4 is naturally cold, it is characterized in that, described condensing unit (23) comprises the outdoor condenser (231) be connected between described compressor (22) with described second control valve (24) and the cooling water output device (233) coordinated with described outdoor condenser (231), and described second control part (25) controls the volume output of described cooling water output device (233).
10. the multi-connection refrigeration system that the band according to any one of claim 1-4 is naturally cold, it is characterized in that, described first control part (13) and described second control part (25) are connected by communication, and described second control part (25) controls the start and stop of described second control part (25) according to the described indoor refrigeration demand that the first control part (13) transmits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520135554.2U CN204574320U (en) | 2015-03-10 | 2015-03-10 | With naturally cold multi-connection refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520135554.2U CN204574320U (en) | 2015-03-10 | 2015-03-10 | With naturally cold multi-connection refrigeration system |
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| Publication Number | Publication Date |
|---|---|
| CN204574320U true CN204574320U (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520135554.2U Withdrawn - After Issue CN204574320U (en) | 2015-03-10 | 2015-03-10 | With naturally cold multi-connection refrigeration system |
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| Country | Link |
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| CN (1) | CN204574320U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776524A (en) * | 2015-03-10 | 2015-07-15 | 深圳市艾特网能有限公司 | Multi-connected refrigerating system with natural cooling function, and control method thereof |
-
2015
- 2015-03-10 CN CN201520135554.2U patent/CN204574320U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776524A (en) * | 2015-03-10 | 2015-07-15 | 深圳市艾特网能有限公司 | Multi-connected refrigerating system with natural cooling function, and control method thereof |
| WO2016141790A1 (en) * | 2015-03-10 | 2016-09-15 | 深圳市艾特网能有限公司 | Multi-connection refrigeration system having natural cold source, and control method thereof |
| CN104776524B (en) * | 2015-03-10 | 2018-07-06 | 深圳市艾特网能有限公司 | With naturally cold multi-connection refrigeration system and its control method |
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