CN104676938B - A kind of split type unit machine cooling system of one drag two and its control method - Google Patents

A kind of split type unit machine cooling system of one drag two and its control method Download PDF

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Publication number
CN104676938B
CN104676938B CN201510057438.8A CN201510057438A CN104676938B CN 104676938 B CN104676938 B CN 104676938B CN 201510057438 A CN201510057438 A CN 201510057438A CN 104676938 B CN104676938 B CN 104676938B
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China
Prior art keywords
liquid
evaporimeter
dividing head
condenser
filtering
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CN104676938A (en
Inventor
潘展华
梁杰荣
付慧亮
原志锋
张景卫
叶松梅
梁志滔
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Guangdong Shenling Air Conditioning Equipment Co Ltd
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Guangdong Shenling Air Conditioning Equipment Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The invention discloses a kind of split type unit machine cooling system of one drag two and its control method, by arranging off-premises station comprising two sets independent refrigeration systems corresponding two indoor sets respectively, two systems can work independently；Needs according to actual service conditions, on the basis of original system, propose the system schema and control method of various deformation simultaneously, high with reliability, applied widely, the advantages of flexible for installation.

Description

A kind of split type unit machine cooling system of one drag two and its control method
Technical field
The present invention relates to nuclear power field of air conditioning, more particularly to a kind of split type unit machine cooling system of one drag two and its Control method.
Background technology
At present, one drag two system or one drag more than multisystem using the multiple indoor set systems of outdoor machine system correspondence.Such as Patent CN201120220868 adopts a compressor（10）Two indoor heat converters of correspondence（4,5）（As shown in Figure 1）, when which In indoor heat converter when closing, system is in operation at part load state, compressor（10）Efficiency reduce.
As patent CN200410083880 adopts two compressors（4,5）With a condenser（8）Scheme, throttling arrangement is Two sections of independent capillaries, with conventional system without part be to solve the uneven problem of two systems shunting, two sections of capillaries it Between connect one section of equilibration capillary（10）（As shown in Figure 2）.The program is disadvantageous in that equilibration capillary（10）It is adjustable It is limited in scope, when two indoor sets and off-premises station distance difference are larger, its counterbalance effect will weaken, causes unit oil return, cold The appearance of unequal integrity problem is measured, so as to limit its application scenario.
System above scheme is applied has in the operation of some special occasions that limited occasion, reliability and efficiency are impacted to be lacked Point.
The content of the invention
It is an object of the invention to provide a kind of split type unit machine cooling system of one drag two and its control method, it is intended to solve Certainly existing one drag two system range of application is restricted in some special operation occasions, and the reliability of system, operational efficiency are received The problem of impact.
Technical scheme is as follows：A kind of split type unit machine cooling system of one drag two, wherein, including off-premises station, First indoor set, the second indoor set, first throttle device module, second throttling device module and condenser, the off-premises station bag The first refrigeration system and the second refrigeration system are included, wherein the first refrigeration system includes the first compressor and the first gas-liquid separator, Second refrigeration system includes the second compressor and the second gas-liquid separator, the first indoor set include the first device for drying and filtering, first Liquid-dividing head module and the first evaporimeter module, the second indoor set include the second device for drying and filtering, the second liquid-dividing head module and second Evaporimeter module；Described first compressor one end is connected with first gas-liquid separator one end, the first gas-liquid separator other end with First evaporimeter module one end connects, and the first evaporimeter module other end is connected with first liquid-dividing head module one end, first point of liquid The head mould group other end is connected with first device for drying and filtering one end, and the first device for drying and filtering other end is connected with condenser one end, cold The condenser other end is connected with the first compressor other end；The first high-pressure is connected between the condenser and the first compressor Switch, is connected with the first low pressure switch, the first gas-liquid separator and the between the first compressor and the first gas-liquid separator The first stop valve is provided between one evaporimeter module, between the first liquid-dividing head module and the first device for drying and filtering, first is provided with Throttling arrangement module, is provided with the second stop valve between the first device for drying and filtering and condenser, the second stop valve and condenser it Between be provided with the first condensing pressure switch, the exhaust ports of the first evaporimeter module are provided with the first centrifugal blower；It is described Second compressor one end is connected with second gas-liquid separator one end, the second gas-liquid separator other end and the second evaporimeter module one End connection, the second evaporimeter module other end is connected with second liquid-dividing head module one end, the second liquid-dividing head module other end and the Two device for drying and filtering one end connect, and the second device for drying and filtering other end is connected with condenser one end, the condenser other end and second The compressor other end connects；The second high-pressure switch, the second compressor are connected between the condenser and the second compressor And second be connected with the second low pressure switch between gas-liquid separator, between the second gas-liquid separator and the second evaporimeter module The 3rd stop valve is provided with, second throttling device module between the second liquid-dividing head module and the second device for drying and filtering, is provided with, the The 4th stop valve is provided between two devices for drying and filtering and condenser, between the 4th stop valve and condenser, the second condensation is provided with Pressure switch, the exhaust ports of the second evaporimeter module are provided with the second centrifugal blower；At the thermovent of the condenser It is provided with condensation fan.
The split type unit machine cooling system of described one drag two, wherein, the condenser arranges two, including the first condensation Device and the second condenser：The first device for drying and filtering other end is connected with first condenser one end, the first condenser other end and The one compressor other end connects；The first high-pressure switch is connected between first condenser and the first compressor；Second The device for drying and filtering other end is connected with second condenser one end, and the second condenser other end is connected with the second compressor other end； The second high-pressure switch is connected between second condenser and the second compressor.
The split type unit machine cooling system of described one drag two, wherein, first refrigeration system also includes the first oil From device, the first filter and the second filter, the second refrigeration system also includes the second oil eliminator, the 3rd filter and the 4th mistake Filter：Described first compressor one end is connected with first gas-liquid separator one end, and the first gas-liquid separator other end and first steams The connection of device module one end is sent out, the first evaporimeter module other end is connected with first liquid-dividing head module one end, the first liquid-dividing head module The other end is connected with first device for drying and filtering one end, and the first device for drying and filtering other end is connected with first condenser one end, and first The condenser other end is connected with the first oil eliminator, and the first oil eliminator other end is connected with the first compressor other end；First The oil return opening of oil eliminator is connected with first filter one end, and the first filter other end is connected with first compressor one end, the The one gas-liquid separator other end is connected with second filter one end, and the second filter other end is connected with first condenser one end； The first high-pressure switch, the first compressor and the first gas-liquid point are connected between first oil eliminator and the first compressor The first low pressure switch is connected between device, between the first gas-liquid separator and the first evaporimeter module, first section is provided with Only valve, is provided with first throttle device module, the first device for drying and filtering between the first liquid-dividing head module and the first device for drying and filtering And first be provided with the second stop valve between condenser, the first condensing pressure between the second stop valve and the first condenser, is provided with Switch, is provided with the first hydrojet expansion valve and the first hydrojet magnetic valve between the second filter and the first gas-liquid separator, described First hydrojet magnetic valve is connected with the first temperature controller, and the exhaust ports of the first evaporimeter module are provided with the first centrifugation Blower fan；Described second compressor one end is connected with second gas-liquid separator one end, and the second gas-liquid separator other end and second steams The connection of device module one end is sent out, the second evaporimeter module other end is connected with second liquid-dividing head module one end, the second liquid-dividing head module The other end is connected with second device for drying and filtering one end, and the second device for drying and filtering other end is connected with second condenser one end, and second The condenser other end is connected with the second oil eliminator, and the second oil eliminator other end is connected with the second compressor other end；Second The oil return opening of oil eliminator is connected with the 3rd filter one end, and the 3rd filter other end is connected with second compressor one end, the The two gas-liquid separator other ends are connected with the 4th filter one end, and the 4th filter other end is connected with second condenser one end； The second high-pressure switch, the second compressor and the second gas-liquid point are connected between second oil eliminator and the second compressor The second low pressure switch is connected between device, the 3rd section between the second gas-liquid separator and the second evaporimeter module, is provided with Only valve, is provided with second throttling device module, the second device for drying and filtering between the second liquid-dividing head module and the second device for drying and filtering And second be provided with the 4th stop valve between condenser, between the 4th stop valve and the second condenser, the second condensing pressure is provided with Switch, is provided with the second hydrojet expansion valve and the second hydrojet magnetic valve between the 4th filter and the second gas-liquid separator, described Second hydrojet magnetic valve is connected with second temperature controller, and the exhaust ports of the second evaporimeter module are provided with the second centrifugation Blower fan.
The split type unit machine cooling system of described one drag two, wherein, the first throttle device module includes first segment Stream device, second throttling device and the 3rd throttling arrangement, second throttling device module include the 4th throttling arrangement, the 5th throttling dress Put and the 6th throttling arrangement, the first liquid-dividing head module includes the first liquid-dividing head, the second liquid-dividing head and the 3rd liquid-dividing head, second point of liquid Head mould group includes the 4th liquid-dividing head, the 5th liquid-dividing head and the 6th liquid-dividing head, the first evaporimeter module include the first evaporimeter, second Evaporimeter and the 3rd evaporimeter, the second evaporimeter module include the 4th evaporimeter, the 5th evaporimeter and the 6th evaporimeter：Described One end of one end of one evaporimeter, one end of the second evaporimeter and the 3rd evaporimeter is connected in parallel, the other end of the first evaporimeter It is connected with one end of the first liquid-dividing head, the other end of the second evaporimeter is connected with one end of the second liquid-dividing head, the 3rd evaporimeter The other end is connected with one end of the 3rd liquid-dividing head, the other end of the first liquid-dividing head, the other end of the second liquid-dividing head and the 3rd point of liquid The other end of head is connected in parallel；Described first compressor one end is connected with first gas-liquid separator one end, the first gas-liquid separator Being connected in parallel for the other end and first evaporimeter one end, second evaporimeter one end and the 3rd evaporimeter one end is connected, first point The liquid head other end, the second liquid-dividing head other end and the 3rd liquid-dividing head other end be connected in parallel a little with first device for drying and filtering one end Connection, the first device for drying and filtering other end are connected with first condenser one end, and the first condenser other end is another with the first compressor One end connects；The first high-pressure switch, the first compressor and are connected between first condenser and the first compressor The first low pressure switch, the first gas-liquid separator and first evaporimeter one end, the second steaming are connected between one gas-liquid separator Send out the first stop valve, the first liquid-dividing head and the first drying are provided between being connected in parallel a little of device one end and the 3rd evaporimeter one end First throttle device is provided between filter, the first magnetic valve between first throttle device and the first liquid-dividing head, is provided with, the One magnetic valve is connected with the 3rd temperature controller, and the second throttling dress is provided between the second liquid-dividing head and the first device for drying and filtering Put, between second throttling device and the second liquid-dividing head, be provided with the second magnetic valve, the second magnetic valve and the 4th temperature controller connect Connect, between the 3rd liquid-dividing head and the first device for drying and filtering, be provided with the 3rd throttling arrangement；First device for drying and filtering and condenser it Between be provided with the second stop valve, be provided between the second stop valve and condenser the first condensing pressure switch, it is described first evaporation The exhaust ports of device module are provided with the first centrifugal blower；One end of 4th evaporimeter, one end of the 5th evaporimeter and One end of six evaporimeters is connected in parallel, and the other end of the 4th evaporimeter is connected with one end of the 4th liquid-dividing head, the 5th evaporimeter The other end is connected with one end of the 5th liquid-dividing head, and the other end of the 6th evaporimeter is connected with one end of the 6th liquid-dividing head, the 4th point The other end of the other end of liquid head, the other end of the 5th liquid-dividing head and the 6th liquid-dividing head is connected in parallel；Second compressor one End is connected with second gas-liquid separator one end, the second gas-liquid separator other end and the 4th evaporimeter one end, the 5th evaporimeter one End is connected in parallel a connection, the 4th liquid-dividing head other end, the 5th liquid-dividing head other end and the 6th point with the 6th evaporimeter one end Being connected in parallel for the liquid head other end is a little connected with second device for drying and filtering one end, and the second device for drying and filtering other end and second is condensed Device one end connects, and the second condenser other end is connected with the second compressor other end；Second condenser and the second compressor Between be connected with the second high-pressure switch, the second low pressure is connected between the second compressor and the second gas-liquid separator and is opened Close, the second gas-liquid separator and the 4th evaporimeter one end, the 5th evaporimeter one end and the 6th evaporimeter one end are connected in parallel a little Between be provided with the 3rd stop valve, be provided with the 4th throttling arrangement between the 4th liquid-dividing head and the second device for drying and filtering, Section four The 4th magnetic valve is provided between stream device and the 4th liquid-dividing head, the 4th magnetic valve is connected with the 6th temperature controller, the 5th point The 5th throttling arrangement is provided between liquid head and the second device for drying and filtering, is provided between the 5th throttling arrangement and the 5th liquid-dividing head 5th magnetic valve, the 5th magnetic valve are connected with the 7th temperature controller, are arranged between the 6th liquid-dividing head and the second device for drying and filtering There is the 6th throttling arrangement；The 4th stop valve, the 4th stop valve and condenser are provided between second device for drying and filtering and condenser Between be provided with the second condensing pressure switch, the exhaust ports of the second evaporimeter module are provided with the second centrifugal blower.
The split type unit machine cooling system of described one drag two, wherein, first refrigeration system also includes the first oil From device, the first filter and the second filter, the second refrigeration system also includes the second oil eliminator, the 3rd filter and the 4th mistake Filter：One end of one end, one end of the second evaporimeter and the 3rd evaporimeter of first evaporimeter is connected in parallel, the first evaporation The other end of device is connected with one end of the first liquid-dividing head, and the other end of the second evaporimeter is connected with one end of the second liquid-dividing head, the The other end of three evaporimeters is connected with one end of the 3rd liquid-dividing head, the other end of the first liquid-dividing head, the other end of the second liquid-dividing head It is connected in parallel with the other end of the 3rd liquid-dividing head；Described first compressor one end is connected with first gas-liquid separator one end, and first The gas-liquid separator other end and first evaporimeter one end, second evaporimeter one end and the 3rd evaporimeter one end are connected in parallel a company Connect, being connected in parallel for the first liquid-dividing head other end, the second liquid-dividing head other end and the 3rd liquid-dividing head other end is a little dried with first Filter one end connects, and the first device for drying and filtering other end is connected with first condenser one end, the first condenser other end and the One oil eliminator connects, and the first oil eliminator other end is connected with the first compressor other end；The oil return opening of the first oil eliminator It is connected with first filter one end, the first filter other end is connected with first compressor one end, and the first gas-liquid separator is another End is connected with second filter one end, and the second filter other end is connected with first condenser one end；First oil eliminator And first be connected with the first high-pressure switch between compressor, between the first compressor and the first gas-liquid separator, is connected with One low pressure switch, the first gas-liquid separator and first evaporimeter one end, second evaporimeter one end and the 3rd evaporimeter one end Be connected in parallel a little between be provided with the first stop valve, be provided with first throttle between the first liquid-dividing head and the first device for drying and filtering Device, is provided with the first magnetic valve, the first magnetic valve and the 3rd temperature controller between first throttle device and the first liquid-dividing head Connection, is provided with second throttling device, second throttling device and second point of liquid between the second liquid-dividing head and the first device for drying and filtering The second magnetic valve is provided between head, the second magnetic valve is connected with the 4th temperature controller, and the 3rd liquid-dividing head is dried with first The 3rd throttling arrangement is provided between filter；The second stop valve is provided between first device for drying and filtering and the first condenser, the The first condensing pressure switch is provided between two stop valves and the first condenser, the exhaust ports of the first evaporimeter module set It is equipped with the first centrifugal blower；One end of one end, one end of the 5th evaporimeter and the 6th evaporimeter of the 4th evaporimeter is in parallel Connection, the other end of the 4th evaporimeter are connected with one end of the 4th liquid-dividing head, the other end and the 5th liquid-dividing head of the 5th evaporimeter One end connection, the other end of the 6th evaporimeter is connected with one end of the 6th liquid-dividing head, the other end of the 4th liquid-dividing head, the 5th point The other end of the other end of liquid head and the 6th liquid-dividing head is connected in parallel；Described second compressor one end and the second gas-liquid separator one End connection, the second gas-liquid separator other end and the 4th evaporimeter one end, the 5th evaporimeter one end and the 6th evaporimeter one end It is connected in parallel connection, the 4th liquid-dividing head other end, the 5th liquid-dividing head other end and the 6th liquid-dividing head other end are connected in parallel Point is connected with second device for drying and filtering one end, and the second device for drying and filtering other end is connected with second condenser one end, the second condensation The device other end is connected with the second oil eliminator, and the second oil eliminator other end is connected with the second compressor other end；Second oil Oil return opening from device is connected with the 3rd filter one end, and the 3rd filter other end is connected with second compressor one end, the second gas The liquid/gas separator other end is connected with the 4th filter one end, and the 4th filter other end is connected with second condenser one end；It is described The second high-pressure switch, the second compressor and the second gas-liquid separator are connected between second oil eliminator and the second compressor Between be connected with the second low pressure switch, the second gas-liquid separator and the 4th evaporimeter one end, the 5th evaporimeter one end and the The 3rd stop valve is provided between being connected in parallel a little of six evaporimeter one end, is set between the 4th liquid-dividing head and the second device for drying and filtering The 4th throttling arrangement is equipped with, the 4th magnetic valve, the 4th magnetic valve and between the 4th throttling arrangement and the 4th liquid-dividing head, is provided with Six temperature controllers connect, and the 5th throttling arrangement, the 5th throttling dress are provided between the 5th liquid-dividing head and the second device for drying and filtering Put and the 5th liquid-dividing head between and be provided with the 5th magnetic valve, the 5th magnetic valve is connected with the 7th temperature controller, the 6th liquid-dividing head The 6th throttling arrangement is provided between the second device for drying and filtering；Is provided between second device for drying and filtering and the second condenser Four stop valves, are provided with the second condensing pressure switch, the second evaporimeter module between the 4th stop valve and the second condenser Exhaust ports be provided with the second centrifugal blower.
A kind of control method of the split type unit machine cooling system of the one drag two as described in above-mentioned any one, wherein, tool Body is comprised the following steps：
Step A00：Maximal pressure force value and minimal pressure force value in initialization system pipeline, sets condensing pressure setting value, if Determine outlet air temperature set value；
Step B00：Judge system line pressures and maximal pressure force value and the size of minimal pressure force value, judge system condensing pressure Power and the size of condensing pressure setting value, judge the delivery temperature of system and the size of outlet air temperature set value；
Step C00：Controlled according to the judged result of step B00：The opening and closing of high-pressure switch and low pressure switch, after And control whole system and whether run, whole system is run in the range of normal pipeline pressure；What condensing pressure was switched opens Close, control then the keying of condensation fan, whole system is run in normal condensing pressure range；Hydrojet magnetic valve it is upper The opening and closing of whether electric or magnetic valve, whether the upper whether electric connection for controlling then Liquid injection cooling loop of control hydrojet magnetic valve to be, The delivery temperature of control system in claimed range controls the opening and closing of magnetic valve, controls then the keying of corresponding evaporimeter, make The suction temperature and delivery temperature of system is in claimed range.
The control method of the split type unit machine cooling system of described one drag two, wherein, step B00 and step C00 In to high-pressure switch and low pressure switch control process it is as follows：
Step B10：Judge that the loine pressure of the first refrigeration system, whether higher than maximal pressure force value, is, execution step C11, It is no, execution step C12；Judge that the loine pressure of the second refrigeration system, whether higher than maximal pressure force value, is, execution step C13, It is no, execution step C14；Judge that the loine pressure of the first refrigeration system, whether less than minimal pressure force value, is, execution step C21, It is no, execution step C22；Judge that the loine pressure of the second refrigeration system, whether less than minimal pressure force value, is, execution step C23, It is no, execution step C24；
Step C11：First high-pressure switch disconnects, and the first refrigeration system and the first indoor set are out of service；
Step C12：First refrigeration system and the first indoor set do not change current operating conditions；
Step C13：Second high-pressure switch disconnects, and the second refrigeration system and the second indoor set are out of service；
Step C14：Second refrigeration system and the second indoor set do not change current operating conditions；
Step C21：First low pressure is switched off, and the first refrigeration system and the first indoor set are out of service；
Step C22：First refrigeration system and the first indoor set do not change current operating conditions；
Step C23：Second low pressure is switched off, and the second refrigeration system and the second indoor set are out of service；
Step C24：Second refrigeration system and the second indoor set do not change current operating conditions.
The control method of the split type unit machine cooling system of described one drag two, wherein, step B00 and step C00 In to condensing pressure switch control process it is as follows：
Step B70：Judge the running status of the first indoor set and the second indoor set, if the first indoor set and the second indoor set Simultaneously run, execution step B30- step C34, if the operation of the first indoor set is when the second indoor office closes or the second indoor set simultaneously First indoor set is closed simultaneously for operation, execution step B40- step C42；
Step B30：Judge whether the condensing pressure of the first refrigeration system is less than condensing pressure setting value while the second refrigeration Whether the condensing pressure of system is less than condensing pressure setting value, if the condensing pressure of the first refrigeration system is set less than condensing pressure Value is while the condensing pressure of the second refrigeration system is less than condensing pressure setting value, execution step C31, if the first refrigeration system is cold Solidifying pressure is not less than condensing pressure setting value less than the condensing pressure of condensing pressure setting value simultaneously the second refrigeration system, performs step Rapid C32, if the condensing pressure of the first refrigeration system is not less than condensing pressure setting value while the condensing pressure of the second refrigeration system Less than condensing pressure setting value, execution step C33, if to be not less than condensing pressure setting value same for the condensing pressure of the first refrigeration system When the second refrigeration system condensing pressure be not less than condensing pressure setting value, execution step C34；
Step C31：First condensing pressure is switched and the second condensing pressure switch all disconnects, and condensation fan is closed；
Step C32：First condensing pressure is switched off, and the second condensing pressure switch closure, condensation fan are opened；
Step C33：First condensing pressure switch closure, the second condensing pressure are switched off, and condensation fan is opened；
Step C34：First condensing pressure is switched and the second condensing pressure switch is all closed, and condensation fan is opened；
Step B40：Judge the condensing pressure of the first refrigeration system whether less than condensing pressure setting value or the second refrigeration system Whether the condensing pressure of system is less than condensing pressure setting value, if the condensing pressure of the first refrigeration system is less than condensing pressure setting value Or second refrigeration system condensing pressure be less than condensing pressure setting value, execution step C41, if the condensation pressure of the first refrigeration system Power is not less than condensing pressure setting value or the condensing pressure of the second refrigeration system is not less than condensing pressure setting value, execution step C42；
Step C41：First condensing pressure is switched or the second condensing pressure is switched off, and condensation fan is closed；
Step C42：First condensing pressure is switched or the second condensing pressure switch closure, and condensation fan is opened.
The control method of the split type unit machine cooling system of described one drag two, wherein, step B00 and step C00 In it is as follows to the control process of hydrojet magnetic valve：
Step B50：Judge that the delivery temperature of the first refrigeration system, whether more than outlet air temperature set value, is, execution step C51, no, execution step C52；Judge that the delivery temperature of the second refrigeration system, whether more than outlet air temperature set value, is to perform step Rapid C53, no, execution step C54；
Step C51：First temperature controller is closed, electricity, the first Liquid injection cooling circuit communication, root on the first hydrojet magnetic valve The aperture size of the first hydrojet expansion valve is controlled according to delivery temperature size；
Step C52：First temperature controller disconnects, the first hydrojet magnetic valve power-off, and the first Liquid injection cooling loop disconnects；
Step C53：Second temperature controller is closed, electricity, the second Liquid injection cooling circuit communication, root on the second hydrojet magnetic valve The aperture size of the second hydrojet expansion valve is controlled according to delivery temperature size；
Step C54：Second temperature controller disconnects, the second hydrojet magnetic valve power-off, and the second Liquid injection cooling loop disconnects.
The control method of the split type unit machine cooling system of described one drag two, wherein, step B00 and step C00 In it is as follows to the control process of magnetic valve：
Step B60：Judge the delivery temperature of the first refrigeration system whether more than outlet air temperature set value and be for the first time or It is more than outlet air temperature set value second, is that execution step C61 is to be more than for the second time for the first time more than outlet air temperature set value Outlet air temperature set value, execution step C62 are no, execution step C64；Judge whether the delivery temperature of the second refrigeration system is more than Outlet air temperature set value and be for the first time or second more than outlet air temperature set value, be for the first time more than delivery temperature setting Value, execution step C65 is that, for the second time more than outlet air temperature set value, execution step C66 is no, execution step C68；
Step C61：3rd temperature controller disconnects, and the first magnetic valve power-off, the first evaporimeter are out of service；
Step C62：3rd temperature controller and the 4th temperature controller disconnect, and the first magnetic valve and the second magnetic valve are disconnected Electricity, the first evaporimeter and the second evaporimeter it is out of service；
Step C64：First refrigeration system does not change current operating conditions；
Step C65：6th temperature controller disconnects, and the 4th magnetic valve power-off, the 4th evaporimeter are out of service；
Step C66：6th temperature controller and the 7th temperature controller disconnect, and the 4th magnetic valve and the 5th magnetic valve are disconnected Electricity, the 4th evaporimeter and the 5th evaporimeter it is out of service；
Step C68：Second refrigeration system does not change current operating conditions.
Beneficial effects of the present invention：The present invention is by providing a kind of split type unit machine cooling system of one drag two and its control Method, respectively corresponds to two indoor sets comprising two sets of independent refrigeration systems by arranging off-premises station, and two systems can independent work Make；Needs according to actual service conditions, on the basis of original system, propose the system schema and controlling party of various deformation simultaneously Method, it is high with reliability, it is applied widely, the advantages of flexible for installation.
Description of the drawings
Fig. 1 is the refrigeration system schematic diagram of patent CN201120220868.
Fig. 2 is the refrigeration system schematic diagram of patent CN200410083880.
Fig. 3 is company when the split type unit machine cooling system first embodiment of one drag two arranges a condenser in the present invention Connect schematic diagram.
Fig. 4 is company when the split type unit machine cooling system first embodiment of one drag two arranges two condensers in the present invention Connect schematic diagram.
Fig. 5 is company when the split type unit machine cooling system second embodiment of one drag two arranges a condenser in the present invention Connect schematic diagram.
Fig. 6 is company when the split type unit machine cooling system second embodiment of one drag two arranges two condensers in the present invention Connect schematic diagram.
Fig. 7 is company when the split type unit machine cooling system 3rd embodiment of one drag two arranges a condenser in the present invention Connect schematic diagram.
Fig. 8 is company when the split type unit machine cooling system 3rd embodiment of one drag two arranges two condensers in the present invention Connect schematic diagram.
The step of Fig. 9 is the split type unit machine control method of refrigeration of one drag two in present invention flow chart.
Specific embodiment
To make the objects, technical solutions and advantages of the present invention clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings The present invention is further described
As shown in Figure 3 and Figure 4, be the split type unit machine cooling system of this one drag two first embodiment.
As shown in figure 3, the split type unit machine cooling system of this one drag two includes off-premises station, the first indoor set 300, second Room Interior machine 400, first throttle device module, second throttling device module and condenser, the off-premises station include the first refrigeration system 100 and second refrigeration system 200, wherein the first refrigeration system 100 includes the first compressor 110 and the first gas-liquid separator 120, Second refrigeration system 200 includes the second compressor 210 and the second gas-liquid separator 220, and the first indoor set 300 includes the first drying Filter 310, the first liquid-dividing head module and the first evaporimeter module, the second indoor set 400 include the second device for drying and filtering 410, Second liquid-dividing head module and the second evaporimeter module；Described first compressor, 110 one end is connected with 120 one end of the first gas-liquid separator Connect, 120 other end of the first gas-liquid separator is connected with first evaporimeter module one end, the first evaporimeter module other end and first Liquid-dividing head module one end connects, and the first liquid-dividing head module other end is connected with 310 one end of the first device for drying and filtering, and first is dried 310 other end of filter is connected with condenser one end, and the condenser other end is connected with 110 other end of the first compressor；The condensation The first high-pressure switch 111, the first compressor 110 and the first gas-liquid separator are connected between device and the first compressor 110 The first low pressure switch 112 is connected between 120, is provided between the first gas-liquid separator 120 and the first evaporimeter module First stop valve, is provided with first throttle device module between the first liquid-dividing head module and the first device for drying and filtering 310, first is dry The second stop valve is provided between dry filter 310 and condenser, the first condensation between the second stop valve and condenser, is provided with Pressure switch, the exhaust ports of the first evaporimeter module are provided with the first centrifugal blower；Described second compressor, 210 one end It is connected with 220 one end of the second gas-liquid separator, 220 other end of the second gas-liquid separator is connected with second evaporimeter module one end, The second evaporimeter module other end is connected with second liquid-dividing head module one end, and the second liquid-dividing head module other end is dried with second 410 one end of filter connects, and 410 other end of the second device for drying and filtering is connected with condenser one end, and the condenser other end and second is pressed 210 other end of contracting machine connects；It is connected with the second high-pressure switch 211 between the condenser and the second compressor 210, second The second low pressure switch 212,220 He of the second gas-liquid separator are connected between compressor 210 and the second gas-liquid separator 220 The 3rd stop valve is provided between second evaporimeter module, is arranged between the second liquid-dividing head module and the second device for drying and filtering 410 Have second throttling device module, between the second device for drying and filtering 410 and condenser, be provided with the 4th stop valve, the 4th stop valve and The second condensing pressure switch is provided between condenser, the exhaust ports of the second evaporimeter module are provided with the second centrifugation wind Machine；Condensation fan is provided with the thermovent of the condenser.
As shown in figure 4, specifically, the condenser can be arranged according to actual needs, and two refrigeration systems share one Condenser, annexation are arranged as shown in Figure 3；The condenser can arrange two according to actual needs（First condenser and Second condenser）, two refrigeration systems individually correspond to a condenser：First device for drying and filtering, 310 other end and first Condenser one end connects, and the first condenser other end is connected with 110 other end of the first compressor；First condenser and first The first high-pressure switch 111 is connected between compressor 110；Second device for drying and filtering, 410 other end and the second condenser one End connection, the second condenser other end are connected with 210 other end of the second compressor；Second condenser and the second compressor The second high-pressure switch 211 is connected between 210.
Specifically, the throttling arrangement module adopts heating power expansion valve or electric expansion valve or capillary.Throttling arrangement mould Group can be disposed in the interior or outdoor, and throttling arrangement module is disposed in the outdoor the volume that can reduce indoor equipment.
As shown in Figure 5 and Figure 6, be the split type unit machine cooling system of this one drag two second embodiment.
As shown in figure 5, in order to avoid because indoor and outdoor unit mounting distance is longer when cause system oil return, cold deficiency etc. can By sex chromosome mosaicism, the split type unit machine cooling system of this one drag two also includes oily separating circuit；Meanwhile, in order to avoid unit is in high temperature During refrigerating operaton, excessive discharge temperature and pressure at expulsion are too high, and high-pressure controller action causes the unit grade out of service can By sex chromosome mosaicism, the split type unit machine cooling system of this one drag two also includes Liquid injection cooling loop（The split type unit machine of this one drag two Refrigeration system specifically includes off-premises station, the first indoor set 300, the second indoor set 400, first throttle device module, the second throttling Device module and condenser, the off-premises station include the first refrigeration system 100 and the second refrigeration system 200, the first refrigeration system 100 include the first compressor 110, the first gas-liquid separator 120, the first oil eliminator 130, the first filter 140 and the second mistake Filter 150, the second refrigeration system 200 include the second compressor 210, the second gas-liquid separator 220, the second oil eliminator 230, Three filters 240 and the 4th filter 250, the first indoor set 300 include the first device for drying and filtering 310, the first liquid-dividing head module With the first evaporimeter module, the second indoor set 400 include the second device for drying and filtering 410, the second liquid-dividing head module and second evaporation Device module）, internal annexation is specific as follows：Described first compressor, 110 one end is connected with 120 one end of the first gas-liquid separator Connect, 120 other end of the first gas-liquid separator is connected with first evaporimeter module one end, the first evaporimeter module other end and first Liquid-dividing head module one end connects, and the first liquid-dividing head module other end is connected with 310 one end of the first device for drying and filtering, and first is dried 310 other end of filter is connected with condenser one end, and the condenser other end is connected with the first oil eliminator 130, the first oil eliminator 130 other ends are connected with 110 other end of the first compressor；140 one end of oil return opening and the first filter of first oil eliminator 130 Connection, 140 other end of the first filter are connected with 110 one end of the first compressor, 120 other end of the first gas-liquid separator and second 150 one end of filter connects, and 150 other end of the second filter is connected with condenser one end；First oil eliminator 130 and The first high-pressure switch 111 is connected between one compressor 110, between the first compressor 110 and the first gas-liquid separator 120 The first low pressure switch 112 is connected with, between the first gas-liquid separator 120 and the first evaporimeter module, the first cut-off is provided with Valve, is provided with first throttle device module, the first device for drying and filtering between the first liquid-dividing head module and the first device for drying and filtering 310 The second stop valve is provided between 310 and condenser, the first condensing pressure switch between the second stop valve and condenser, is provided with, The first hydrojet expansion valve 151 and the first hydrojet magnetic valve are provided between second filter 150 and the first gas-liquid separator 120 152, the first hydrojet magnetic valve 152 is connected with the first temperature controller, and the exhaust ports of the first evaporimeter module set It is equipped with the first centrifugal blower；Described second compressor, 210 one end is connected with 220 one end of the second gas-liquid separator, the second gas-liquid point It is connected with second evaporimeter module one end from 220 other end of device, the second evaporimeter module other end and the second liquid-dividing head module one End connection, the second liquid-dividing head module other end are connected with 410 one end of the second device for drying and filtering, and the second device for drying and filtering 410 is another End be connected with condenser one end, the condenser other end is connected with the second oil eliminator 230,230 other end of the second oil eliminator and Second compressor, 210 other end connects；The oil return opening of the second oil eliminator 230 is connected with 140 one end of the 3rd filter, the 3rd mistake 240 other end of filter is connected with 210 one end of the second compressor, 220 other end of the second gas-liquid separator and the 4th filter 250 1 End connection, 250 other end of the 4th filter are connected with condenser one end；Second oil eliminator 230 and the second compressor 210 Between be connected with the second high-pressure switch 211, be connected with second between the second compressor 210 and the second gas-liquid separator 220 Low pressure switch 212, is provided with the 3rd stop valve between the second gas-liquid separator 220 and the second evaporimeter module, second point Second throttling device module, the second device for drying and filtering 410 and condensation are provided between liquid head mould group and the second device for drying and filtering 410 The 4th stop valve is provided between device, the second condensing pressure switch between the 4th stop valve and condenser, is provided with, the 4th filters It is provided with the second hydrojet expansion valve 251 and the second hydrojet magnetic valve 252 between device 250 and the second gas-liquid separator 220, described Two hydrojet magnetic valves 252 are connected with second temperature controller, the exhaust ports of the second evaporimeter module be provided with second from Heart blower fan；Condensation fan is provided with the thermovent of the condenser.
As shown in fig. 6, specifically, the condenser can be arranged according to actual needs, and two refrigeration systems share one Condenser, annexation are arranged as shown in Figure 5；The condenser can arrange two according to actual needs（First condenser and Second condenser）, two refrigeration systems individually correspond to a condenser：First device for drying and filtering, 310 other end and first Condenser one end connects, and the first condenser other end is connected with the first oil eliminator 130；Second filter, 150 other end and One condenser one end connects；The second stop valve, the second stop valve are provided between first device for drying and filtering 310 and the first condenser And first be provided with the first condensing pressure switch between condenser；Second device for drying and filtering, 410 other end and the second condenser one End connection, the second condenser other end are connected with the second oil eliminator 230；4th filter, 250 other end and the second condenser One end connects；It is provided with the 4th stop valve between second device for drying and filtering 410 and the second condenser, the 4th stop valve and second cold The second condensing pressure switch is provided between condenser.
Specifically, the throttling arrangement adopts heating power expansion valve or electric expansion valve or capillary.Throttling arrangement can set Put indoors or outdoor, throttling arrangement is disposed in the outdoor the volume that can reduce indoor equipment.
The split type unit machine refrigerant system configuration Liquid injection cooling of this one drag two, Liquid injection cooling are drawn by outdoor condenser outlet Go out, before being connected to gas-liquid separator, in unit hot operation, delivery temperature can be effectively reduced；Meanwhile, system configuration oil is separated Device and associated pipe, oil eliminator draw oil return line from blast pipe, after being connected to gas-liquid separator, before compressor air suction mouth, in room When internal-external machine is in larger distance, longer connecting tube can guarantee that oil return efficiency；In addition, system configuration high-low pressure controller and condensation Pressure controller, it is ensured that unit is run in normal pressure limit；Due to using two sets of independent refrigeration systems, this one drag two Split type unit machine cooling system overcomes conventional one and drags many refrigeration system cold-producing medium shunting imbalance problems.
As shown in Figure 7 and Figure 8, be the split type unit machine cooling system of this one drag two 3rd embodiment.
As shown in fig. 7, specifically, in order to delivery temperature be reduced according to system loading situation, make unit safety operation, it is described First throttle device module includes first throttle device, second throttling device and the 3rd throttling arrangement, second throttling device module Including the 4th throttling arrangement, the 5th throttling arrangement and the 6th throttling arrangement, the first liquid-dividing head module include the first liquid-dividing head, second Liquid-dividing head and the 3rd liquid-dividing head, the second liquid-dividing head module include the 4th liquid-dividing head, the 5th liquid-dividing head and the 6th liquid-dividing head, and first steams Sending out device module includes the first evaporimeter, the second evaporimeter and the 3rd evaporimeter, the second evaporimeter module include the 4th evaporimeter, the Five evaporimeters and the 6th evaporimeter；One end of one end, one end of the second evaporimeter and the 3rd evaporimeter of first evaporimeter It is connected in parallel, the other end of the first evaporimeter is connected with one end of the first liquid-dividing head, the other end of the second evaporimeter and second point One end connection of liquid head, the other end of the 3rd evaporimeter is connected with one end of the 3rd liquid-dividing head, the other end of the first liquid-dividing head, the The other end of the other end of two liquid-dividing heads and the 3rd liquid-dividing head is connected in parallel；Described first compressor, 110 one end and the first gas-liquid 120 one end of separator connects, 120 other end of the first gas-liquid separator and first evaporimeter one end, second evaporimeter one end and the Three evaporimeter one end are connected in parallel connection, and the first liquid-dividing head other end, the second liquid-dividing head other end and the 3rd liquid-dividing head are another Being connected in parallel for one end is a little connected with 310 one end of the first device for drying and filtering, 310 other end of the first device for drying and filtering and condenser one End connection, the condenser other end are connected with 110 other end of the first compressor；Connect between the condenser and the first compressor 110 The first high-pressure switch 111 is connected to, the first low pressure pressure between the first compressor 110 and the first gas-liquid separator 120, is connected with Power switch 112, the first gas-liquid separator 120 and first evaporimeter one end, second evaporimeter one end and the 3rd evaporimeter one end The first stop valve is provided between being connected in parallel a little, between the first liquid-dividing head and the first device for drying and filtering 310, first segment is provided with Stream device, is provided with the first magnetic valve, the first magnetic valve and the 3rd temperature control between first throttle device and the first liquid-dividing head Device connects, and second throttling device, second throttling device and second are provided between the second liquid-dividing head and the first device for drying and filtering 310 The second magnetic valve is provided between liquid-dividing head, the second magnetic valve is connected with the 4th temperature controller, and the 3rd liquid-dividing head is dry with first The 3rd throttling arrangement is provided between dry filter 310, between the 3rd throttling arrangement and the 3rd liquid-dividing head, the 3rd electromagnetism is provided with Valve, the 3rd magnetic valve are connected with the 5th temperature controller；The second cut-off is provided between first device for drying and filtering 310 and condenser Valve, is provided with the first condensing pressure switch, the exhaust ports of the first evaporimeter module between the second stop valve and condenser It is provided with the first centrifugal blower；One end of one end, one end of the 5th evaporimeter and the 6th evaporimeter of the 4th evaporimeter is simultaneously Connection connection, the other end of the 4th evaporimeter is connected with one end of the 4th liquid-dividing head, the other end of the 5th evaporimeter and the 5th point of liquid One end connection of head, the other end of the 6th evaporimeter is connected with one end of the 6th liquid-dividing head, the other end of the 4th liquid-dividing head, the 5th The other end of the other end of liquid-dividing head and the 6th liquid-dividing head is connected in parallel；Described second compressor, 210 one end and the second gas-liquid point From the connection of 220 one end of device, 220 other end of the second gas-liquid separator and the 4th evaporimeter one end, the 5th evaporimeter one end and the 6th Evaporimeter one end is connected in parallel connection, and the 4th liquid-dividing head other end, the 5th liquid-dividing head other end and the 6th liquid-dividing head are another End is connected in parallel and a little is connected with 410 one end of the second device for drying and filtering, 410 other end of the second device for drying and filtering and condenser one end Connection, the condenser other end are connected with 210 other end of the second compressor；Connect between the condenser and the second compressor 210 There is the second high-pressure switch 211, between the second compressor 210 and the second gas-liquid separator 220, be connected with the second low pressure Switch 212, the second gas-liquid separator 220 and the 4th evaporimeter one end, the 5th evaporimeter one end and the 6th evaporimeter one end are simultaneously The 3rd stop valve is provided between connection tie point, between the 4th liquid-dividing head and the second device for drying and filtering 410, the 4th throttling is provided with Device, is provided with the 4th magnetic valve, the 4th magnetic valve and the 6th temperature controller between the 4th throttling arrangement and the 4th liquid-dividing head Connection, is provided with the 5th throttling arrangement between the 5th liquid-dividing head and the second device for drying and filtering 410, the 5th throttling arrangement and the 5th point The 5th magnetic valve is provided between liquid head, the 5th magnetic valve is connected with the 7th temperature controller, the 6th liquid-dividing head and second is dried The 6th throttling arrangement is provided between filter 410, between the 6th throttling arrangement and the 6th liquid-dividing head, the 6th magnetic valve is provided with, 6th magnetic valve is connected with the 8th temperature controller；The 4th stop valve is provided between second device for drying and filtering 410 and condenser, The second condensing pressure switch is provided between 4th stop valve and condenser, the exhaust ports of the second evaporimeter module are arranged There is the second centrifugal blower；Condensation fan is provided with the thermovent of the condenser.
As shown in figure 8, specifically, the condenser can be arranged according to actual needs, and two refrigeration systems share one Condenser, annexation are arranged as shown in Figure 7；The condenser can arrange two according to actual needs（First condenser and Second condenser）, two refrigeration systems individually correspond to a condenser：First device for drying and filtering, 310 other end and first Condenser one end connects, and the first condenser other end is connected with 110 other end of the first compressor；First condenser and first The first high-pressure switch 111 is connected between compressor 110；Second device for drying and filtering, 410 other end and the second condenser one End connection, the second condenser other end are connected with 210 other end of the second compressor；Second condenser and the second compressor The second high-pressure switch 211 is connected between 210.
The split type unit machine cooling system of one drag two as shown in Figure 7 can also increase oily separating circuit（Including off-premises station, First indoor set 300, the second indoor set 400, first throttle device module, second throttling device module and condenser, the room Outer machine includes the first refrigeration system 100 and the second refrigeration system 200, the first refrigeration system 100 include the first compressor 110, One gas-liquid separator 120, the first oil eliminator 130, the first filter 140 and the second filter 150, the second refrigeration system 200 Including the second compressor 210, the second gas-liquid separator 220, the second oil eliminator 230, the 3rd filter 240 and the 4th filter 250, the first indoor set 300 includes the first device for drying and filtering 310, the first liquid-dividing head module and the first evaporimeter module, second Room Interior machine 400 includes the second device for drying and filtering 410, the second liquid-dividing head module and the second evaporimeter module, first throttle device module Including first throttle device, second throttling device and the 3rd throttling arrangement, second throttling device module include the 4th throttling arrangement, 5th throttling arrangement and the 6th throttling arrangement, the first liquid-dividing head module include the first liquid-dividing head, the second liquid-dividing head and the 3rd point of liquid Head, the second liquid-dividing head module include the 4th liquid-dividing head, the 5th liquid-dividing head and the 6th liquid-dividing head, and the first evaporimeter module includes first Evaporimeter, the second evaporimeter and the 3rd evaporimeter, the second evaporimeter module include the 4th evaporimeter, the 5th evaporimeter and the 6th steaming Send out device）：One end of one end, one end of the second evaporimeter and the 3rd evaporimeter of first evaporimeter is connected in parallel, and first steams The other end for sending out device is connected with one end of the first liquid-dividing head, and the other end of the second evaporimeter is connected with one end of the second liquid-dividing head, The other end of the 3rd evaporimeter is connected with one end of the 3rd liquid-dividing head, the other end of the first liquid-dividing head, the second liquid-dividing head it is another The other end of end and the 3rd liquid-dividing head is connected in parallel；Described first compressor, 110 one end is connected with 120 one end of the first gas-liquid separator Connect, 120 other end of the first gas-liquid separator and first evaporimeter one end, second evaporimeter one end and the 3rd evaporimeter one end are simultaneously Connection tie point connection, the first liquid-dividing head other end, the second liquid-dividing head other end and the 3rd liquid-dividing head other end are connected in parallel a little It is connected with 310 one end of the first device for drying and filtering, 310 other end of the first device for drying and filtering is connected with condenser one end, and condenser is another One end is connected with the first oil eliminator 130, and 130 other end of the first oil eliminator is connected with 110 other end of the first compressor；First The oil return opening of oil eliminator 130 is connected with 140 one end of the first filter, 140 other end of the first filter and the first compressor 110 One end connects, and 120 other end of the first gas-liquid separator is connected with 150 one end of the second filter, 150 other end of the second filter and Condenser one end connects；The first high-pressure switch is connected between first oil eliminator 130 and the first compressor 110 111, the first low pressure switch 112, the first gas-liquid point are connected between the first compressor 110 and the first gas-liquid separator 120 It is provided between being connected in parallel a little of device 120 and first evaporimeter one end, second evaporimeter one end and the 3rd evaporimeter one end First stop valve, is provided with first throttle device between the first liquid-dividing head and the first device for drying and filtering 310, first throttle device and The first magnetic valve is provided between first liquid-dividing head, the first magnetic valve is connected with the 3rd temperature controller, the second liquid-dividing head and Second throttling device is provided between one device for drying and filtering 310, between second throttling device and the second liquid-dividing head, second is provided with Magnetic valve, the second magnetic valve are connected with the 4th temperature controller, are provided between the 3rd liquid-dividing head and the first device for drying and filtering 310 3rd throttling arrangement；The second stop valve, the second stop valve and condenser are provided between first device for drying and filtering 310 and condenser Between be provided with the first condensing pressure switch, the exhaust ports of the first evaporimeter module are provided with the first centrifugal blower；Institute One end, one end of the 5th evaporimeter and the one end of the 6th evaporimeter for stating the 4th evaporimeter is connected in parallel, the 4th evaporimeter it is another One end is connected with one end of the 4th liquid-dividing head, and the other end of the 5th evaporimeter is connected with one end of the 5th liquid-dividing head, the 6th evaporation The other end of device is connected with one end of the 6th liquid-dividing head, the other end of the 4th liquid-dividing head, the other end and the 6th of the 5th liquid-dividing head The other end of liquid-dividing head is connected in parallel；Described second compressor, 210 one end is connected with 220 one end of the second gas-liquid separator, and second 220 other end of gas-liquid separator is connected in parallel with the 4th evaporimeter one end, the 5th evaporimeter one end and the 6th evaporimeter one end Point connection, the 4th liquid-dividing head other end, the 5th liquid-dividing head other end and the 6th liquid-dividing head other end are connected in parallel a little and second 410 one end of device for drying and filtering connects, and 410 other end of the second device for drying and filtering is connected with condenser one end, the condenser other end and Second oil eliminator 230 connects, and 230 other end of the second oil eliminator is connected with 210 other end of the second compressor；Second oil is separated The oil return opening of device 230 is connected with 240 one end of the 3rd filter, and 240 other end of the 3rd filter and 210 one end of the second compressor connect Connect, 220 other end of the second gas-liquid separator is connected with 250 one end of the 4th filter, 250 other end of the 4th filter and condenser One end connects；It is connected with the second high-pressure switch 211 between second oil eliminator 230 and the second compressor 210, second The second low pressure switch 212,220 He of the second gas-liquid separator are connected between compressor 210 and the second gas-liquid separator 220 The 3rd cut-off is provided between being connected in parallel a little of 4th evaporimeter one end, the 5th evaporimeter one end and the 6th evaporimeter one end Valve, is provided with the 4th throttling arrangement, the 4th throttling arrangement and the 4th point of liquid between the 4th liquid-dividing head and the second device for drying and filtering 410 The 4th magnetic valve is provided between head, the 4th magnetic valve is connected with the 6th temperature controller, and the 5th liquid-dividing head is dried with second The 5th throttling arrangement is provided between filter 410, between the 5th throttling arrangement and the 5th liquid-dividing head, the 5th magnetic valve is provided with, the Five magnetic valves are connected with the 7th temperature controller, are provided with the 6th throttling between the 6th liquid-dividing head and the second device for drying and filtering 410 Device；The 4th stop valve is provided between second device for drying and filtering 410 and condenser, is arranged between the 4th stop valve and condenser There is the second condensing pressure to switch, the exhaust ports of the second evaporimeter module are provided with the second centrifugal blower；The condenser Thermovent at be provided with condensation fan.
The split type unit machine cooling system of one drag two as shown in Figure 8 can also increase oily separating circuit, and system specifically connects It is similar with the annexation that the split type unit machine cooling system of the one drag two of Fig. 7 increases oily separating circuit to connect relation, simply condenses Device arranges two, and the first condenser is connected with the first refrigeration system, and the second condenser is connected with the second condenser system, here no longer Repeat.
Connect a magnetic valve and a heating power expansion valve in evaporimeter front end, can be controlled according to the load condition of system The quantity that evaporimeter processed is opened, it is therefore intended that reduce delivery temperature, make unit safety operation.Specifically control mode is：In high temperature In the case of, by detecting delivery temperature or suction temperature, when reaching temperature conditionss, by progressively closing the electricity before each evaporimeter Magnet valve, gradually reduces the quantity of evaporimeter operation, so as to reducing evaporator heat exchange area and reducing heat exchange air quantity, reduces air-breathing temperature Degree and delivery temperature；Meanwhile, if indoor and outdoor unit mounting distance is longer, oil eliminator can be increased and its respective line ensures back Oily efficiency.
As shown in figure 9, a kind of control method of the split type unit machine cooling system of one drag two as described above, concrete to wrap Include following steps：
Step A00：Maximal pressure force value and minimal pressure force value in initialization system pipeline, sets condensing pressure setting value, if Determine outlet air temperature set value；
Step B00：Judge system line pressures and maximal pressure force value and the size of minimal pressure force value, judge system condensing pressure Power and the size of condensing pressure setting value, judge the delivery temperature of system and the size of outlet air temperature set value；
Step C00：Controlled according to the judged result of step B00：The opening and closing of high-pressure switch and low pressure switch, after And control whole system and whether run, whole system is run in the range of normal pipeline pressure；What condensing pressure was switched opens Close, control then the keying of condensation fan, whole system is run in normal condensing pressure range；Hydrojet magnetic valve it is upper The opening and closing of whether electric or magnetic valve, whether the upper whether electric connection for controlling then Liquid injection cooling loop of control hydrojet magnetic valve to be, The delivery temperature of control system in claimed range controls the opening and closing of magnetic valve, controls then the keying of corresponding evaporimeter, make The suction temperature and delivery temperature of system is in claimed range.
Specifically, it is as follows to the control process of high-pressure switch in step B00 and step C00：
Step B10：Judge that the loine pressure of the first refrigeration system 100, whether higher than maximal pressure force value, is, execution step C11, no, execution step C12；Judge that the loine pressure of the second refrigeration system 200, whether higher than maximal pressure force value, is to perform step Rapid C13, no, execution step C14；
Step C11：First high-pressure switch 111 disconnects, and the first refrigeration system 100 and the first indoor set 300 stop fortune OK；
Step C12：First refrigeration system 100 and the first indoor set 300 do not change current operating conditions；
Step C13：Second high-pressure switch 211 disconnects, and the second refrigeration system 200 and the second indoor set 400 stop fortune OK；
Step C14：Second refrigeration system 200 and the second indoor set 400 do not change current operating conditions.
Specifically, it is as follows to the control process of low pressure switch in step B00 and step C00：
Step B20：Judge that the loine pressure of the first refrigeration system 100, whether less than minimal pressure force value, is, execution step C21, no, execution step C22；Judge that the loine pressure of the second refrigeration system 200, whether less than minimal pressure force value, is to perform step Rapid C23, no, execution step C24；
Step C21：First low pressure switch 112 disconnects, and the first refrigeration system 100 and the first indoor set 300 stop fortune OK；
Step C22：First refrigeration system 100 and the first indoor set 300 do not change current operating conditions；
Step C23：Second low pressure switch 212 disconnects, and the second refrigeration system 200 and the second indoor set 400 stop fortune OK；
Step C24：Second refrigeration system 200 and the second indoor set 400 do not change current operating conditions.
Specifically, it is if the first indoor set 300 and the second indoor set 400 are run simultaneously, right in step B00 and step C00 The control process of condensing pressure switch is as follows：
Step B30：Judge whether the condensing pressure of the first refrigeration system 100 is less than condensing pressure setting value while the second system Whether the condensing pressure of cooling system 200 is less than condensing pressure setting value, if the condensing pressure of the first refrigeration system 100 is less than condensation The condensing pressure of pressure set points simultaneously the second refrigeration system 200 is less than condensing pressure setting value, execution step C31, if first The condensing pressure of refrigeration system 100 less than condensing pressure setting value simultaneously the second refrigeration system 200 condensing pressure be not less than it is cold Solidifying pressure set points, execution step C32, if the condensing pressure of the first refrigeration system 100 be not less than condensing pressure setting value while The condensing pressure of the second refrigeration system 200 is less than condensing pressure setting value, execution step C33, if the first refrigeration system 100 is cold Solidifying pressure is not less than condensing pressure setting value while the condensing pressure of the second refrigeration system 200 is not less than condensing pressure setting value, Execution step C34；
Step C31：First condensing pressure is switched and the second condensing pressure switch all disconnects, and condensation fan is closed；
Step C32：First condensing pressure is switched off, and the second condensing pressure switch closure, condensation fan are opened；
Step C33：First condensing pressure switch closure, the second condensing pressure are switched off, and condensation fan is opened；
Step C34：First condensing pressure is switched and the second condensing pressure switch is all closed, and condensation fan is opened.
Specifically, if the operation of the first indoor set 300 is when simultaneously the second indoor set 400 is closed or the second indoor set 400 runs It is when first indoor set 300 is closed simultaneously, as follows to the control process of condensing pressure switch in step B00 and step C00：
Step B40：Judge the condensing pressure of the first refrigeration system 100 whether less than condensing pressure setting value or the second refrigeration Whether the condensing pressure of system 200 is less than condensing pressure setting value, if the condensing pressure of the first refrigeration system 100 is less than condensation pressure The condensing pressure of power setting value or the second refrigeration system 200 is less than condensing pressure setting value, execution step C41, if the first refrigeration The condensing pressure of system 100 is not less than condensing pressure setting value or the condensing pressure of the second refrigeration system 200 is not less than condensation pressure Power setting value, execution step C42；
Step C41：First condensing pressure is switched or the second condensing pressure is switched off, and condensation fan is closed；
Step C42：First condensing pressure is switched or the second condensing pressure switch closure, and condensation fan is opened.
Specifically, it is as follows to the control process of hydrojet magnetic valve in step B00 and step C00：
Step B50：Judge that the delivery temperature of the first refrigeration system 100, whether more than outlet air temperature set value, is to perform step Rapid C51, no, execution step C52；Judge that the delivery temperature of the second refrigeration system 200, whether more than outlet air temperature set value, is, Execution step C53, no, execution step C54；
Step C51：First temperature controller is closed, electricity on the first hydrojet magnetic valve 152, and the first Liquid injection cooling loop connects It is logical, the aperture size of the first hydrojet expansion valve 151 is controlled according to delivery temperature size；
Step C52：First temperature controller disconnects, 152 power-off of the first hydrojet magnetic valve, and the first Liquid injection cooling loop is broken Open；
Step C53：Second temperature controller is closed, electricity on the second hydrojet magnetic valve 252, and the second Liquid injection cooling loop connects It is logical, the aperture size of the second hydrojet expansion valve 251 is controlled according to delivery temperature size；
Step C54：Second temperature controller disconnects, 252 power-off of the second hydrojet magnetic valve, and the second Liquid injection cooling loop is broken Open.
Specifically, it is as follows to the control process of magnetic valve in step B00 and step C00：
Step B60：Judge the delivery temperature of the first refrigeration system 100 whether more than outlet air temperature set value and be for the first time Or it is more than outlet air temperature set value for the second time, it, more than outlet air temperature set value, execution step C61, is for the second time greatly to be for the first time In outlet air temperature set value, execution step C62；Judge whether the delivery temperature of the second refrigeration system 200 is set more than delivery temperature Definite value and be for the first time or second more than outlet air temperature set value, be for the first time more than outlet air temperature set value, execution step C65, is that, for the second time more than outlet air temperature set value, execution step C66 is no, execution step C68；
Step C61：3rd temperature controller disconnects, and the first magnetic valve power-off, the first evaporimeter are out of service；
Step C62：3rd temperature controller and the 4th temperature controller disconnect, and the first magnetic valve and the second magnetic valve are disconnected Electricity, the first evaporimeter and the second evaporimeter it is out of service；
Step C64：First refrigeration system 100 does not change current operating conditions；
Step C65：6th temperature controller disconnects, and the 4th magnetic valve power-off, the 4th evaporimeter are out of service；
Step C66：6th temperature controller and the 7th temperature controller disconnect, and the 4th magnetic valve and the 5th magnetic valve are disconnected Electricity, the 4th evaporimeter and the 5th evaporimeter it is out of service；
The second refrigeration system of step C68 200 does not change current operating conditions.
A kind of split type unit machine cooling system of this one drag two includes two sets of independent refrigeration systems by arranging off-premises station Two indoor sets are corresponded to respectively, and two systems can work independently；While according to the needs of actual service conditions, in the base of original system On plinth, the system schema and control method of various deformation are proposed, it is high with reliability, it is applied widely, the advantages of flexible for installation.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, and for those of ordinary skills, can To be improved according to the above description or be converted, all these modifications and variations should all belong to the guarantor of claims of the present invention Shield scope.

Claims (10)

1. the split type unit machine cooling system of a kind of one drag two, it is characterised in that including off-premises station, the first indoor set, second Room Interior machine, first throttle device module, second throttling device module and condenser, the off-premises station include the first refrigeration system and Two refrigeration systems, wherein the first refrigeration system includes the first compressor and the first gas-liquid separator, the second refrigeration system includes Two compressors and the second gas-liquid separator, the first indoor set include that the first device for drying and filtering, the first liquid-dividing head module and first steam Device module is sent out, the second indoor set includes the second device for drying and filtering, the second liquid-dividing head module and the second evaporimeter module；Described first Compressor one end is connected with first gas-liquid separator one end, and the first gas-liquid separator other end and first evaporimeter module one end connect Connect, the first evaporimeter module other end is connected with first liquid-dividing head module one end, and the first liquid-dividing head module other end is dry with first Dry filter one end connection, the first device for drying and filtering other end are connected with condenser one end, and the condenser other end and first compresses The machine other end connects；The first high-pressure switch, the first compressor and are connected between the condenser and the first compressor The first low pressure switch is connected between one gas-liquid separator, is arranged between the first gas-liquid separator and the first evaporimeter module There is the first stop valve, between the first liquid-dividing head module and the first device for drying and filtering, be provided with first throttle device module, first is dry The second stop valve is provided between dry filter and condenser, the first condensing pressure between the second stop valve and condenser, is provided with Switch, the exhaust ports of the first evaporimeter module are provided with the first centrifugal blower；Described second compressor one end and second Gas-liquid separator one end connects, and the second gas-liquid separator other end is connected with second evaporimeter module one end, the second evaporimeter mould The group other end is connected with second liquid-dividing head module one end, and the second liquid-dividing head module other end and second device for drying and filtering one end connect Connect, the second device for drying and filtering other end is connected with condenser one end, the condenser other end is connected with the second compressor other end；Institute State and between condenser and the second compressor, be connected with the second high-pressure switch, between the second compressor and the second gas-liquid separator The second low pressure switch is connected with, the 3rd stop valve between the second gas-liquid separator and the second evaporimeter module, is provided with, the Second throttling device module, the second device for drying and filtering and condenser are provided between two liquid-dividing head modules and the second device for drying and filtering Between be provided with the 4th stop valve, be provided between the 4th stop valve and condenser the second condensing pressure switch, it is described second steam The exhaust ports for sending out device module are provided with the second centrifugal blower；Condensation fan is provided with the thermovent of the condenser.
2. the split type unit machine cooling system of one drag two according to claim 1, it is characterised in that the condenser is arranged Two, including the first condenser and the second condenser：The first device for drying and filtering other end is connected with first condenser one end, and first The condenser other end is connected with the first compressor other end；First is connected between first condenser and the first compressor high Pressure pressure is switched；The second device for drying and filtering other end is connected with second condenser one end, and the second condenser other end and second is pressed The contracting machine other end connects；The second high-pressure switch is connected between second condenser and the second compressor.
3. the split type unit machine cooling system of one drag two according to claim 2, it is characterised in that the first refrigeration system System also includes the first oil eliminator, the first filter and the second filter, the second refrigeration system also include the second oil eliminator, the Three filters and the 4th filter：Described first compressor one end is connected with first gas-liquid separator one end, the first gas-liquid separation The device other end is connected with first evaporimeter module one end, and the first evaporimeter module other end and first liquid-dividing head module one end connect Connect, the first liquid-dividing head module other end is connected with first device for drying and filtering one end, the first device for drying and filtering other end is cold with first Condenser one end connects, and the first condenser other end is connected with the first oil eliminator, and the first oil eliminator other end and first compresses The machine other end connects；The oil return opening of the first oil eliminator is connected with first filter one end, the first filter other end and first Compressor one end connects, and the first gas-liquid separator other end is connected with second filter one end, the second filter other end and the One condenser one end connects；It is connected with the first high-pressure switch between first oil eliminator and the first compressor, first The first low pressure switch, the first gas-liquid separator and the first evaporimeter mould are connected between compressor and the first gas-liquid separator The first stop valve is provided between group, first throttle device mould between the first liquid-dividing head module and the first device for drying and filtering, is provided with Group, is provided with the second stop valve, between the second stop valve and the first condenser between the first device for drying and filtering and the first condenser The first condensing pressure switch is provided with, the first hydrojet expansion valve and the between the second filter and the first gas-liquid separator, is provided with One hydrojet magnetic valve, the first hydrojet magnetic valve are connected with the first temperature controller, the exhaust of the first evaporimeter module The first centrifugal blower is provided with mouthful；Described second compressor one end is connected with second gas-liquid separator one end, the second gas-liquid point It is connected with second evaporimeter module one end from the device other end, the second evaporimeter module other end and second liquid-dividing head module one end connect Connect, the second liquid-dividing head module other end is connected with second device for drying and filtering one end, the second device for drying and filtering other end is cold with second Condenser one end connects, and the second condenser other end is connected with the second oil eliminator, and the second oil eliminator other end and second compresses The machine other end connects；The oil return opening of the second oil eliminator is connected with the 3rd filter one end, the 3rd filter other end and second Compressor one end connects, and the second gas-liquid separator other end is connected with the 4th filter one end, the 4th filter other end and the Two condenser one end connect；It is connected with the second high-pressure switch between second oil eliminator and the second compressor, second The second low pressure switch, the second gas-liquid separator and the second evaporimeter mould are connected between compressor and the second gas-liquid separator The 3rd stop valve is provided between group, between the second liquid-dividing head module and the second device for drying and filtering, second throttling device mould is provided with Group, is provided with the 4th stop valve, between the 4th stop valve and the second condenser between the second device for drying and filtering and the second condenser The second condensing pressure switch is provided with, the second hydrojet expansion valve and the between the 4th filter and the second gas-liquid separator, is provided with Two hydrojet magnetic valves, the second hydrojet magnetic valve are connected with second temperature controller, the exhaust of the second evaporimeter module The second centrifugal blower is provided with mouthful.
4. the split type unit machine cooling system of one drag two according to claim 2, it is characterised in that the first throttle dress Putting module includes first throttle device, second throttling device and the 3rd throttling arrangement, and second throttling device module includes Section four Stream device, the 5th throttling arrangement and the 6th throttling arrangement, the first liquid-dividing head module include the first liquid-dividing head, the second liquid-dividing head and the Three liquid-dividing heads, the second liquid-dividing head module include the 4th liquid-dividing head, the 5th liquid-dividing head and the 6th liquid-dividing head, the first evaporimeter module bag Include the first evaporimeter, the second evaporimeter and the 3rd evaporimeter, the second evaporimeter module include the 4th evaporimeter, the 5th evaporimeter and 6th evaporimeter：One end of one end, one end of the second evaporimeter and the 3rd evaporimeter of first evaporimeter is connected in parallel, the The other end of one evaporimeter is connected with one end of the first liquid-dividing head, and one end of the other end of the second evaporimeter and the second liquid-dividing head connects Connect, the other end of the 3rd evaporimeter is connected with one end of the 3rd liquid-dividing head, the other end of the first liquid-dividing head, the second liquid-dividing head it is another The other end of one end and the 3rd liquid-dividing head is connected in parallel；Described first compressor one end is connected with first gas-liquid separator one end, The first gas-liquid separator other end is connected in parallel with first evaporimeter one end, second evaporimeter one end and the 3rd evaporimeter one end Point connection, the first liquid-dividing head other end, the second liquid-dividing head other end and the 3rd liquid-dividing head other end are connected in parallel a little and first Device for drying and filtering one end connects, and the first device for drying and filtering other end is connected with first condenser one end, the first condenser other end It is connected with the first compressor other end；The first high-pressure switch is connected between first condenser and the first compressor, The first low pressure switch, the first gas-liquid separator and the first evaporation are connected between first compressor and the first gas-liquid separator It is provided with the first stop valve between being connected in parallel a little of device one end, second evaporimeter one end and the 3rd evaporimeter one end, first point First throttle device is provided between liquid head and the first device for drying and filtering, is provided between first throttle device and the first liquid-dividing head First magnetic valve, the first magnetic valve are connected with the 3rd temperature controller, are arranged between the second liquid-dividing head and the first device for drying and filtering There is second throttling device, between second throttling device and the second liquid-dividing head, be provided with the second magnetic valve, the second magnetic valve and the 4th Temperature controller connects, and is provided with the 3rd throttling arrangement between the 3rd liquid-dividing head and the first device for drying and filtering；First dry filter The second stop valve is provided between device and condenser, the first condensing pressure switch between the second stop valve and condenser, is provided with, The exhaust ports of the first evaporimeter module are provided with the first centrifugal blower；One end of 4th evaporimeter, the 5th evaporation One end of one end of device and the 6th evaporimeter is connected in parallel, and the other end of the 4th evaporimeter is connected with one end of the 4th liquid-dividing head, The other end of the 5th evaporimeter is connected with one end of the 5th liquid-dividing head, one end of the other end and the 6th liquid-dividing head of the 6th evaporimeter Connection, the other end of the 4th liquid-dividing head, the other end of the 5th liquid-dividing head and the other end of the 6th liquid-dividing head are connected in parallel；Described Two compressor one end are connected with second gas-liquid separator one end, the second gas-liquid separator other end and the 4th evaporimeter one end, Five evaporimeter one end and the 6th evaporimeter one end are connected in parallel a connection, and the 4th liquid-dividing head other end, the 5th liquid-dividing head are another End and being connected in parallel for the 6th liquid-dividing head other end are a little connected with second device for drying and filtering one end, the second device for drying and filtering other end It is connected with second condenser one end, the second condenser other end is connected with the second compressor other end；Second condenser and The second high-pressure switch is connected between second compressor, between the second compressor and the second gas-liquid separator, second is connected with Low pressure switch, the second gas-liquid separator and the 4th evaporimeter one end, the 5th evaporimeter one end and the 6th evaporimeter one end The 3rd stop valve is provided between being connected in parallel a little, the 4th throttling dress between the 4th liquid-dividing head and the second device for drying and filtering, is provided with Put, between the 4th throttling arrangement and the 4th liquid-dividing head, be provided with the 4th magnetic valve, the 4th magnetic valve and the 6th temperature controller connect Connect, between the 5th liquid-dividing head and the second device for drying and filtering, be provided with the 5th throttling arrangement, the 5th throttling arrangement and the 5th liquid-dividing head Between be provided with the 5th magnetic valve, the 5th magnetic valve is connected with the 7th temperature controller, the 6th liquid-dividing head and the second dry filter The 6th throttling arrangement is provided between device；The 4th stop valve, the 4th cut-off are provided between second device for drying and filtering and condenser Be provided with the second condensing pressure switch between valve and condenser, the exhaust ports of the second evaporimeter module be provided with second from Heart blower fan.
5. the split type unit machine cooling system of one drag two according to claim 4, it is characterised in that the first refrigeration system System also includes the first oil eliminator, the first filter and the second filter, the second refrigeration system also include the second oil eliminator, the Three filters and the 4th filter：One end of one end, one end of the second evaporimeter and the 3rd evaporimeter of first evaporimeter It is connected in parallel, the other end of the first evaporimeter is connected with one end of the first liquid-dividing head, the other end of the second evaporimeter and second point One end connection of liquid head, the other end of the 3rd evaporimeter is connected with one end of the 3rd liquid-dividing head, the other end of the first liquid-dividing head, the The other end of the other end of two liquid-dividing heads and the 3rd liquid-dividing head is connected in parallel；Described first compressor one end and the first gas-liquid separation The connection of device one end, the first gas-liquid separator other end and first evaporimeter one end, second evaporimeter one end and the 3rd evaporimeter one That what is held is connected in parallel a connection, the parallel connection of the first liquid-dividing head other end, the second liquid-dividing head other end and the 3rd liquid-dividing head other end Tie point is connected with first device for drying and filtering one end, and the first device for drying and filtering other end is connected with first condenser one end, and first The condenser other end is connected with the first oil eliminator, and the first oil eliminator other end is connected with the first compressor other end；First The oil return opening of oil eliminator is connected with first filter one end, and the first filter other end is connected with first compressor one end, the The one gas-liquid separator other end is connected with second filter one end, and the second filter other end is connected with first condenser one end； The first high-pressure switch, the first compressor and the first gas-liquid point are connected between first oil eliminator and the first compressor The first low pressure switch, the first gas-liquid separator and first evaporimeter one end, second evaporimeter one end are connected between device And the 3rd be provided with the first stop valve between being connected in parallel a little of evaporimeter one end, the first liquid-dividing head and the first device for drying and filtering it Between be provided with first throttle device, the first magnetic valve, the first magnetic valve are provided between first throttle device and the first liquid-dividing head It is connected with the 3rd temperature controller, between the second liquid-dividing head and the first device for drying and filtering, is provided with second throttling device, second section The second magnetic valve is provided between stream device and the second liquid-dividing head, the second magnetic valve is connected with the 4th temperature controller, the 3rd point The 3rd throttling arrangement is provided between liquid head and the first device for drying and filtering；Arrange between first device for drying and filtering and the first condenser There is the second stop valve, between the second stop valve and the first condenser, be provided with the first condensing pressure switch, first evaporimeter The exhaust ports of module are provided with the first centrifugal blower；One end of 4th evaporimeter, one end and the 6th of the 5th evaporimeter One end of evaporimeter is connected in parallel, and the other end of the 4th evaporimeter is connected with one end of the 4th liquid-dividing head, the 5th evaporimeter it is another One end is connected with one end of the 5th liquid-dividing head, and the other end of the 6th evaporimeter is connected with one end of the 6th liquid-dividing head, the 4th point of liquid The other end of head, the other end of the 5th liquid-dividing head and the other end of the 6th liquid-dividing head are connected in parallel；Described second compressor one end It is connected with second gas-liquid separator one end, the second gas-liquid separator other end and the 4th evaporimeter one end, the 5th evaporimeter one end Connection, the 4th liquid-dividing head other end, the 5th liquid-dividing head other end and the 6th point of liquid are connected in parallel with the 6th evaporimeter one end Being connected in parallel for the other end of head is a little connected with second device for drying and filtering one end, the second device for drying and filtering other end and the second condenser One end connects, and the second condenser other end is connected with the second oil eliminator, and the second oil eliminator other end is another with the second compressor One end connects；The oil return opening of the second oil eliminator is connected with the 3rd filter one end, and the 3rd filter other end and second compresses Machine one end connects, and the second gas-liquid separator other end is connected with the 4th filter one end, and the 4th filter other end is cold with second Condenser one end connects；The second high-pressure switch, the second compression are connected between second oil eliminator and the second compressor It is connected with the second low pressure switch between machine and the second gas-liquid separator, the second gas-liquid separator and the 4th evaporimeter one end, The 3rd stop valve, the 4th liquid-dividing head and are provided between being connected in parallel a little of 5th evaporimeter one end and the 6th evaporimeter one end The 4th throttling arrangement is provided between two devices for drying and filtering, between the 4th throttling arrangement and the 4th liquid-dividing head, the 4th electromagnetism is provided with Valve, the 4th magnetic valve are connected with the 6th temperature controller, and Section five is provided between the 5th liquid-dividing head and the second device for drying and filtering Stream device, is provided with the 5th magnetic valve, the 5th magnetic valve and the 7th temperature control between the 5th throttling arrangement and the 5th liquid-dividing head Device connects, and is provided with the 6th throttling arrangement between the 6th liquid-dividing head and the second device for drying and filtering；Second device for drying and filtering and second The 4th stop valve is provided between condenser, the second condensing pressure switch between the 4th stop valve and the second condenser, is provided with, The exhaust ports of the second evaporimeter module are provided with the second centrifugal blower.
6. a kind of control method of the split type unit machine cooling system of one drag two as claimed in claim 3, it is characterised in that tool Body is comprised the following steps：
Step A00：Maximal pressure force value and minimal pressure force value in initialization system pipeline, sets condensing pressure setting value, setting row Gas desired temperature；
Step B00：Judge the size of system line pressures and maximal pressure force value and minimal pressure force value, judge system condensing pressure and The size of condensing pressure setting value, judges the delivery temperature of system and the size of outlet air temperature set value；
Step C00：Controlled according to the judged result of step B00：It is first high-pressure switch, the second high pressure switch, first low The opening and closing of pressure switch and the second low pressure switch, controls then whole system and whether runs, make whole system normal Run in the range of pipeline pressure；The opening and closing that first condensing pressure is switched and the second condensing pressure is switched, controls condensation fan then Keying, whole system is run in the normal condensing pressure range；First hydrojet magnetic valve and the second hydrojet magnetic valve The opening and closing of upper whether electric or magnetic valve, controls the upper whether electric control spray then of the first hydrojet magnetic valve and the second hydrojet magnetic valve Whether the connection of liquid cooling circuit, and the delivery temperature of control system in claimed range controls the opening and closing of magnetic valve, controls then The keying of corresponding evaporimeter, makes the suction temperature and delivery temperature of system in claimed range.
7. the control method of the split type unit machine cooling system of one drag two according to claim 6, it is characterised in that described It is as follows to the control process of high-pressure switch and low pressure switch in step B00 and step C00：
Step B10：Judge that the loine pressure of the first refrigeration system, whether higher than maximal pressure force value, is that execution step C11 is no, holds Row step C12；Judge that the loine pressure of the second refrigeration system, whether higher than maximal pressure force value, is that execution step C13 is no, performs Step C14；Judge that the loine pressure of the first refrigeration system, whether less than minimal pressure force value, is that execution step C21 is no, performs step Rapid C22；Judge that the loine pressure of the second refrigeration system, whether less than minimal pressure force value, is that execution step C23 is no, execution step C24；
Step C11：First high-pressure switch disconnects, and the first refrigeration system and the first indoor set are out of service；
Step C12：First refrigeration system and the first indoor set do not change current operating conditions；
Step C13：Second high-pressure switch disconnects, and the second refrigeration system and the second indoor set are out of service；
Step C14：Second refrigeration system and the second indoor set do not change current operating conditions；
Step C21：First low pressure is switched off, and the first refrigeration system and the first indoor set are out of service；
Step C22：First refrigeration system and the first indoor set do not change current operating conditions；
Step C23：Second low pressure is switched off, and the second refrigeration system and the second indoor set are out of service；
Step C24：Second refrigeration system and the second indoor set do not change current operating conditions.
8. the control method of the split type unit machine cooling system of one drag two according to claim 6, it is characterised in that described It is as follows to the control process of condensing pressure switch in step B00 and step C00：
Step B70：Judge the running status of the first indoor set and the second indoor set, if the first indoor set and the second indoor set are simultaneously Operation, execution step B30- step C34, if the operation of the first indoor set is when simultaneously the second indoor office closes or the operation of the second indoor set First indoor set is closed simultaneously, execution step B40- step C42；
Step B30：Judge whether the condensing pressure of the first refrigeration system is less than condensing pressure setting value while the second refrigeration system Condensing pressure whether be less than condensing pressure setting value, if the condensing pressure of the first refrigeration system is same less than condensing pressure setting value When the second refrigeration system condensing pressure be less than condensing pressure setting value, execution step C31, if the condensation pressure of the first refrigeration system Power is less than condensing pressure setting value while the condensing pressure of the second refrigeration system is not less than condensing pressure setting value, execution step C32, if the condensing pressure of the first refrigeration system is not less than condensing pressure setting value while the condensing pressure of the second refrigeration system is low In condensing pressure setting value, execution step C33, if the condensing pressure of the first refrigeration system be not less than condensing pressure setting value while The condensing pressure of the second refrigeration system is not less than condensing pressure setting value, execution step C34；
Step C31：First condensing pressure is switched and the second condensing pressure switch all disconnects, and condensation fan is closed；
Step C32：First condensing pressure is switched off, and the second condensing pressure switch closure, condensation fan are opened；
Step C33：First condensing pressure switch closure, the second condensing pressure are switched off, and condensation fan is opened；
Step C34：First condensing pressure is switched and the second condensing pressure switch is all closed, and condensation fan is opened；
Step B40：Judge the condensing pressure of the first refrigeration system whether less than condensing pressure setting value or the second refrigeration system Whether condensing pressure is less than condensing pressure setting value, if the condensing pressure of the first refrigeration system is less than condensing pressure setting value or the The condensing pressure of two refrigeration systems is less than condensing pressure setting value, execution step C41, if the condensing pressure of the first refrigeration system is not Condensing pressure setting value, execution step C42 are not less than less than the condensing pressure of condensing pressure setting value or the second refrigeration system；
Step C41：First condensing pressure is switched or the second condensing pressure is switched off, and condensation fan is closed；
Step C42：First condensing pressure is switched or the second condensing pressure switch closure, and condensation fan is opened.
9. the control method of the split type unit machine cooling system of one drag two according to claim 6, it is characterised in that described It is as follows to the control process of hydrojet magnetic valve in step B00 and step C00：
Step B50：Judge that the delivery temperature of the first refrigeration system, whether more than outlet air temperature set value, is, execution step C51, It is no, execution step C52；Judge that the delivery temperature of the second refrigeration system, whether more than outlet air temperature set value, is, execution step C53, no, execution step C54；
Step C51：First temperature controller is closed, electricity, the first Liquid injection cooling circuit communication, according to row on the first hydrojet magnetic valve Gas temperature level controls the aperture size of the first hydrojet expansion valve；
Step C52：First temperature controller disconnects, the first hydrojet magnetic valve power-off, and the first Liquid injection cooling loop disconnects；
Step C53：Second temperature controller is closed, electricity, the second Liquid injection cooling circuit communication, according to row on the second hydrojet magnetic valve Gas temperature level controls the aperture size of the second hydrojet expansion valve；
Step C54：Second temperature controller disconnects, the second hydrojet magnetic valve power-off, and the second Liquid injection cooling loop disconnects.
10. the control method of the split type unit machine cooling system of one drag two according to claim 6, it is characterised in that institute State as follows to the control process of magnetic valve in step B00 and step C00：
Step B60：Judge the delivery temperature of the first refrigeration system whether more than outlet air temperature set value and be for the first time or second Secondary is to be more than outlet air temperature set value for the first time more than outlet air temperature set value, and execution step C61 is second more than exhaust Desired temperature, execution step C62 are no, execution step C64；Judge the delivery temperature of the second refrigeration system whether more than exhaust Desired temperature and be for the first time or second more than outlet air temperature set value, be for the first time, more than outlet air temperature set value, to hold Row step C65, is that, for the second time more than outlet air temperature set value, execution step C66 is no, execution step C68；
Step C61：3rd temperature controller disconnects, and the first magnetic valve power-off, the first evaporimeter are out of service；
Step C62：3rd temperature controller and the disconnection of the 4th temperature controller, the first magnetic valve and the second magnetic valve power-off, the One evaporimeter and the second evaporimeter are out of service；
Step C64：First refrigeration system does not change current operating conditions；
Step C65：6th temperature controller disconnects, and the 4th magnetic valve power-off, the 4th evaporimeter are out of service；
Step C66：6th temperature controller and the disconnection of the 7th temperature controller, the 4th magnetic valve and the 5th magnetic valve power-off, the Four evaporimeters and the 5th evaporimeter are out of service；
The second refrigeration system of step C68 does not change current operating conditions.
CN201510057438.8A 2015-02-04 2015-02-04 A kind of split type unit machine cooling system of one drag two and its control method Active CN104676938B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3257819A (en) * 1963-09-26 1966-06-28 Blissfield Mfg Company Continuous operation compressor system
US3427819A (en) * 1966-12-22 1969-02-18 Pet Inc High side defrost and head pressure controls for refrigeration systems
CN102109260B (en) * 2009-12-25 2013-03-27 三洋电机株式会社 Refrigerating apparatus
CN204555402U (en) * 2015-02-04 2015-08-12 广东申菱空调设备有限公司 The split type unit machine refrigeration system of a kind of one drag two

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3257819A (en) * 1963-09-26 1966-06-28 Blissfield Mfg Company Continuous operation compressor system
US3427819A (en) * 1966-12-22 1969-02-18 Pet Inc High side defrost and head pressure controls for refrigeration systems
CN102109260B (en) * 2009-12-25 2013-03-27 三洋电机株式会社 Refrigerating apparatus
CN204555402U (en) * 2015-02-04 2015-08-12 广东申菱空调设备有限公司 The split type unit machine refrigeration system of a kind of one drag two

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