CN1757990A - Multi-unit air conditioning system and be used to control the method for this system - Google Patents

Multi-unit air conditioning system and be used to control the method for this system Download PDF

Info

Publication number
CN1757990A
CN1757990A CNA200510009062XA CN200510009062A CN1757990A CN 1757990 A CN1757990 A CN 1757990A CN A200510009062X A CNA200510009062X A CN A200510009062XA CN 200510009062 A CN200510009062 A CN 200510009062A CN 1757990 A CN1757990 A CN 1757990A
Authority
CN
China
Prior art keywords
indoor unit
outdoor
unit
compressor
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA200510009062XA
Other languages
Chinese (zh)
Inventor
宋明燮
郑圭夏
朴文洙
金宇显
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of CN1757990A publication Critical patent/CN1757990A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/005—Outdoor unit expansion 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/007—Compression machines, plants or systems with reversible cycle not otherwise provided for three pipes connecting the outdoor side to the indoor side with multiple indoor units
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • 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
    • F25B2600/25—Control of valves
    • F25B2600/2501—Bypass valves

Abstract

A kind of multi-unit air conditioning system and a kind of method that is used to control described system.Described system comprises: be connected the bypass loop between gases at high pressure pipeline and the fluid pipeline, described gases at high pressure pipeline is connected between the outlet and indoor unit of compressor, and described fluid pipeline is connected between outdoor heat exchanger and the indoor unit; And control module, be used for according to operating condition, use bypass loop, control the refrigerant amount of the indoor unit that inflow operates according to refrigeration mode.When system operates according to main heating mode, described multi-unit air conditioning system increases the refrigerant amount that flows into the indoor unit of operating according to refrigeration mode, thereby can not worsen the refrigerating capacity of the indoor unit of operating according to refrigeration mode, and then improve the performance of the indoor unit of operating according to refrigeration mode.

Description

Multi-unit air conditioning system and be used to control the method for this system
The cross reference of related application
The application requires the rights and interests of the korean patent application No.2004-79624 that submitted to korean industrial property office on October 6th, 2004, and is here that it is open in the lump as a reference.
Technical field
The present invention relates to a kind of multi-unit air conditioning system and be used to control the method for this system, more specifically, relate to a kind of multi-unit air conditioning system, wherein a plurality of indoor units carry out work simultaneously according to refrigeration and heating mode; And a kind of method that is used to control this multi-unit air conditioning system.
Background technology
Usually, a plurality of indoor units that the multi-unit air conditioning system utilization links to each other with an outdoor unit carry out the air-conditioning operation in interior space kind.
The air-conditioning requirement of the interior space of each indoor unit wherein is installed is unified to be provided with, perhaps can change according to the surrounding environment of the interior space.Because the occupant in the interior space has different effective temperatures, some indoor units may be operated according to heating mode, and other indoor units may carry out work according to refrigeration mode.
In order to operate a plurality of indoor units of above-mentioned multi-unit air conditioning system simultaneously according to refrigeration and heating mode, between outdoor unit and indoor unit, refrigerant distributor is installed, be used to control flowing of cold-producing medium, and the indoor unit that will suitably offer the indoor unit that need operate according to heating mode by the cold-producing medium that refrigerant distributor flows through from outdoor unit and need operate according to refrigeration mode.
When indoor unit is operated according to refrigeration and heating mode simultaneously, be higher than under the situation by the required cooling load of the indoor unit of operating according to refrigeration mode at required by the indoor unit of operating according to the heating mode load that heats, according to main heating mode, multi-unit air conditioning system is operated.
In the main heating mode of above-mentioned traditional multi-unit air conditioning system, the cold-producing medium of q.s is offered the indoor unit of operating according to heating mode, but the cold-producing medium of q.s is not provided to the indoor unit of operating according to refrigeration mode, thereby has worsened refrigerating capacity.Therefore, the gratifying heating capacity of the gratifying refrigerating capacity of the indoor unit that need operate according to refrigeration mode of multi-unit air conditioning system and the indoor unit operated according to heating mode.
When the pressure of compressor is higher, has increased the heating capacity of the indoor unit of operating according to heating mode, and kept under the main heating mode, be positioned at the elevated pressures of cold-producing medium in the exit of compressor.When excessive increase was positioned at the pressure of cold-producing medium in exit of compressor, the capacity of the low compressor of mandatory down so that the protection compressor, thereby sharply reduced the pressure of the cold-producing medium in the exit that is positioned at compressor.Therefore, when traditional multi-unit air conditioning system is operated according to main heating mode, excessively increase the pressure of compressor, then, descend suddenly.Therefore, can not keep the steady operation conditions of compressor, thereby prolong the required time of stable multi-unit air conditioning system.
Summary of the invention
Therefore, one aspect of the present invention has proposed a kind of multi-unit air conditioning system, indoor unit based on main heating mode simultaneously according to heating when operating with refrigeration mode, it has the gratifying heating capacity of the indoor unit of operating according to heating mode and the gratifying refrigerating capacity of the indoor unit operated according to refrigeration mode; And a kind of method that is used to control described multi-unit air conditioning system.
Another aspect of the present invention has proposed a kind of multi-unit air conditioning system, and it uses outdoor motor-driven valve to control the pressure of cold-producing medium in the exit of compressor under main heating mode, thus the fast and stable system; And a kind of method that is used to control described multi-unit air conditioning system.
According to an aspect, the present invention proposes a kind of multi-unit air conditioning system, it has: be connected the refrigerant distributor between outdoor unit and a plurality of indoor unit, be used to control flowing of cold-producing medium, carry out refrigeration simultaneously and heat operation; Compressor; Outdoor heat exchanger; Be connected the outlet of compressor and the gases at high pressure pipeline between the indoor unit; Be connected the fluid pipeline between outdoor heat exchanger and the indoor unit; Be connected the bypass loop between gases at high pressure pipeline and the fluid pipeline; And control module, be used for according to operating condition, use bypass loop, control the refrigerant amount of the indoor unit that inflow operates according to refrigeration mode.
The refrigeration total amount that total amount is higher than the indoor unit of operating according to refrigeration mode that heats at the indoor unit of operating according to heating mode, and heat under the situation of percentage in preset range, control module can increase the refrigerant amount of the indoor unit that inflow operates according to refrigeration mode.
Bypass loop can comprise: bypass channel, and an end links to each other with the gases at high pressure pipeline, and the other end links to each other with fluid pipeline; And be installed in valve on the bypass channel, be used to control the pressure of fluid pipeline; And control module can open described valve, to increase the refrigerant amount that flows into the indoor unit of operating according to refrigeration mode.
Described multi-unit air conditioning system can also comprise the outdoor motor-driven valve that links to each other with outdoor heat exchanger with compressor sensor, and described compressor sensor is used for the pressure of cold-producing medium that sensing is positioned at the exit of compressor; And under the situation of open degree at preset range by the set outdoor motor-driven valve of the refrigeration total amount of the indoor unit that heats total amount and operate according to refrigeration mode of the indoor unit of operating according to heating mode, the open degree that control module can come motor-driven valve outside the control room according to the pressure of the cold-producing medium in the exit that is positioned at compressor.
Control module can be higher than under the situation of preset range at the pressure of the cold-producing medium in the exit that is positioned at compressor, increase the open degree of outdoor motor-driven valve, and be lower than under the situation of preset range at the pressure of the cold-producing medium in the exit that is positioned at compressor, reduce the open degree of outdoor motor-driven valve.
Control module can will compare by within the predetermined time the pressure of the cold-producing medium in the exit that is positioned at compressor being averaged the average pressure and the preset range that obtain.
According on the other hand, the present invention proposes a kind of method that is used to control multi-unit air conditioning system, the a plurality of indoor units that are used to allow to link to each other with outdoor unit are carried out refrigeration simultaneously and are heated operation, described method comprises: according to the refrigeration total amount of the indoor unit that heats total amount and operate according to refrigeration mode of the indoor unit of operating according to heating mode, setting operation pattern; And operate according to heating mode for the indoor unit of a greater number wherein in set operator scheme under the situation of the main heating mode that less indoor unit operates according to refrigeration mode, when by heat total amount and refrigeration total amount set heat percentage in predetermined scope the time, the cold-producing medium that allows part will offer the indoor unit of operating according to heating mode flows into the indoor unit of operating according to refrigeration mode.
Described preset range can be higher than 50% and be lower than 82%.
The pressure of cold-producing medium that can sensing be positioned at the exit of compressor, and in the operating period of main heating mode, can be according to the refrigerant pressure that is sensed, the open degree of the outdoor motor-driven valve that control links to each other with outdoor heat exchanger.
Can be higher than under the situation of preset range at the pressure of the cold-producing medium in the exit that is positioned at compressor, increase the open degree of outdoor motor-driven valve, and can be lower than under the situation of preset range at the pressure of the cold-producing medium in the exit that is positioned at compressor, reduce the open degree of outdoor motor-driven valve.
Can compare averaging the average pressure and the preset range that obtain by pressure to the cold-producing medium in the exit that is positioned at compressor.
Description of drawings
By the description to embodiment that provides below in conjunction with accompanying drawing, these and/or other aspect of the present invention and advantage will become apparent and be more readily understood, wherein:
Fig. 1 is the schematic diagram according to multi-unit air conditioning system of the present invention;
Fig. 2 is the block diagram of multi-unit air conditioning system shown in Figure 1;
Fig. 3 shows the schematic diagram that flows of the cold-producing medium when multi-unit air conditioning system is as shown in Figure 1 operated according to main heating mode;
Fig. 4 shows when multi-unit air conditioning system is as shown in Figure 1 operated according to main heating mode, uses the voltage-controlled valve that is arranged in the bypass loop to control the flow chart of processing of the refrigerant amount of the indoor unit that inflow operates according to heating mode; And
The flow chart of the processing of the pressure that Fig. 5 shows when multi-unit air conditioning system is as shown in Figure 1 operated according to main heating mode, the outdoor motor-driven valve of use is controlled compressor.
The specific embodiment
Now, will be described in detail embodiments of the invention, in the accompanying drawings, show the example of this embodiment, wherein similar reference number is represented similar element all the time.Below, with reference to the accompanying drawings, embodiment is described, to explain the present invention.
As shown in Figure 1, multi-unit air conditioning system according to the present invention comprise outdoor unit 100, a plurality of indoor unit 200a, 200b, 200c and 200d and be connected outdoor unit 100 and indoor unit 200a, 200b, 200c and 200d between, be used to control the refrigerant distributor 300 that flows of cold-producing medium.
Outdoor unit 100 comprises outdoor heat exchanger 101, outdoor fan 113, outdoor fan motor 114, the outdoor motor-driven valve 102 that links to each other with the outlet of outdoor heat exchanger 101, switch valve 111 and the check-valves 112 in parallel with outdoor motor-driven valve 102, check-valves 115, compressor 103, four-way valve 104, receiver 106, accumulator 107, and be used to make the cold-producing medium that discharges from compressor 103 to flow through outdoor heat exchanger 101 and be provided for the switch valve 109 and the check-valves 110 of the indoor unit of operating according to heating mode.
Outdoor unit 100 also comprises the outdoor temperature sensor 108 that is used for the sensing outdoor temperature, be used for the pressure sensor 105 of pressure of the cold-producing medium that sensing discharges from compressor 103 and the Tube Temperature Sensor 116 and 117 that is respectively applied for the entrance and exit temperature of sensing outdoor heat exchanger 101.
Fluid pipeline RP is installed between the outdoor heat exchanger 101 of outdoor unit 100 and refrigerant distributor 300, and on fluid pipeline RP motor-driven valve 102 outside the installation room.The switch valve 111 that is connected in parallel with outdoor motor-driven valve 102 is flow control valves.
Outdoor unit 100 also comprises and is connected the bypass channel 118 between gases at high pressure pipeline HPP and the fluid pipeline RP and is installed in votage control switch valve 119 on the bypass duct 118.When opening switch valve 119 under main heating mode, part flows through the cold-producing medium of gases at high pressure pipeline HPP by bypass channel 118, and adds the cold-producing medium that flows through fluid pipeline RP, thereby increases the pressure of fluid pipeline RP.Realize the aforesaid operations of switch valve 119 by the control of outdoor control unit, after a while with described.
Under main heating mode, kept being positioned at the pressure of cold-producing medium in the exit of compressor 103 than the highland.Therefore, the open degree of motor-driven valve 102 outside the control room, thus remain in the pressure of cold-producing medium in the exit of compressor 103, and then systems stabilisation.The open degree of outdoor motor-driven valve 102 is controlled by outdoor control unit, after a while with described.
Indoor unit 200a, 200b, 200c and 200d comprise indoor heat exchanger 201a, 201b, 201c and 201d, indoor motor-driven valve 202a, 202b, 202c and 202d, Tube Temperature Sensor 204a, the 204b, 204c and the 204d that are used for indoor temperature transmitter 203a, 203b, 203c and the 203d of sensing indoor temperature and are used for the entrance and exit temperature of sensing indoor heat exchanger 201a, 201b, 201c and 201d respectively. Indoor unit 200a, 200b, 200c and 200d also comprise indoor fan (not shown) and indoor fan motor (not shown) respectively.
Refrigerant distributor 300 comprises pressure gas valve 301a, 301b, 301c and 301d on the gases at high pressure pipeline HPP that is installed between outdoor unit 100 and indoor unit 200a, 200b, 200c and the 200d, be installed in low- pressure gas valve 302a, 302b, 302c and the 302d on the low-pressure gas pipeline LPP and be installed in motor-driven valve 303 and switch valve 304 on the fluid pipeline RP that is connected between outdoor unit 100 and indoor unit 200a, 200b, 200c and the 200d.Realize the operation of the above-mentioned valve of refrigerant distributor 300 by the control of outdoor control unit, after a while with described.
One end of the four-way valve 104 of outdoor unit 100 links to each other with pressure gas valve 301a, 301b, 301c and the 301d of refrigerant distributor 300 by gases at high pressure pipeline HPP.In addition, the accumulator 107 of outdoor unit 100 links to each other with 302d with low- pressure gas valve 302a, 302b, the 302c of refrigerant distributor 300 by low-pressure gas pipeline LPP.
Fluid pipeline RP links to each other with lateral EP.Lateral carries out branch to indoor unit 200a, 200b, 200c and 200d, and links to each other with 202d with indoor motor-driven valve 202a, 202b, 202c.
As shown in Figure 2, air-conditioning system of the present invention comprise the outdoor control unit 120 that is used to control outdoor unit 100, be used to control indoor unit 200a, 200b, 200c and 200d first to fourth ventricle inner control unit 210a, 210b, 210c and 210d and be connected outdoor control unit 120 and indoor control unit 210a, 210b, 210c and 210d between, be used for the linkage unit 122 that two-way communication is used for the data of operating air conditioning system.
Pressure sensor 105, outdoor temperature sensor 108 and Tube Temperature Sensor 116 link to each other with the input of outdoor control unit 120 with 117.
Be used for operate compressor 103 compressor operation unit 124, be used to operate four-way valve 104 four-way valve operating unit 126, be used for operating room external fan 105 outdoor fan operating unit 128, be used for the outdoor motor-driven valve operating unit 130 of the outer motor-driven valve 102 of operating room and be used for console switch valve 109,111 linking to each other with the output of outdoor control unit 120 with 119 switch valve operating unit 132.
Temperature and operator scheme and the data relevant that indoor control unit 210a, 210b, 210c and 210d provide the indoor temperature that sensed by indoor temperature transmitter 203a, 203b, 203c and 203d, are provided with by function key or remote controller by the user to outdoor control unit 120 respectively with the capacity of indoor unit 200a, 200b, 200c and 200d.
Indoor control unit 210a, 210b, 210c and 210d, together with outdoor control unit 120, motor-driven valve 202a, 202b, 202c and 202d and indoor fan motor (not shown) in the control room.
Fig. 3 shows flowing of cold-producing medium when multi-unit air conditioning system of the present invention is operated according to main heating mode, wherein three indoor unit 200a, 200b and 200c operate according to heating mode, and remaining indoor unit 200d operates according to refrigeration mode.
Under the situation that multi-unit air conditioning system is operated according to main heating mode at first, 120 pairs of compressors 103 of outdoor control unit are operated, and motor-driven valve 102 outside the control room, so that it has initial open degree, and open switch valve 109.Outdoor control unit 120 is opened the indoor unit 200a, the 200b that operate according to heating mode and pressure gas valve 301a, 301b and the 301c of 200c, and closes the pressure gas valve 301d of the indoor unit 200d that operates according to refrigeration mode.In addition, outdoor control unit 120 is closed the indoor unit 200a, the 200b that operate according to heating mode and low- pressure gas valve 302a, 302b and the 302c of 200c, and opens the low-pressure gas valve 302d of the indoor unit 200d that operates according to refrigeration mode.
Shown in the solid line arrow, the most of cold-producing mediums that discharge from compressor 103 pass through switch valve 109 and check-valves 110, and offer indoor unit 200a, 200b and the 200c that operates according to heating mode.Shown in dotted arrow, all the other cold-producing mediums that discharge from compressor pass through outdoor heat exchanger 101 and outdoor motor-driven valve 102.
Under main heating mode, heat total amount (HQ) and be higher than refrigeration total amount (CQ), change according to the operating condition of indoor unit 200a, 200b, 200c and 200d but heat percentage.The percentage that heats under main heating mode is under the situation in 50～82% the scope, deterioration for the refrigerating capacity of the indoor unit 200d that prevents to operate according to refrigeration mode, outdoor control unit 120 is opened switch valve 119, thereby makes the cold-producing medium of high pressure conditions pass through bypass channel 118 influent pipeline RP.Like this, the pressure among the fluid pipeline RP increases.
The cold-producing medium of the high pressure conditions of influent pipeline RP adds the cold-producing medium that has passed through outdoor motor-driven valve 102, then, flows shown in single-point line arrow.Cold-producing medium by fluid pipeline RP adds and has passed through the indoor unit 200a, the 200b that operate according to heating mode and the cold-producing medium of 200c, then, be provided for the indoor unit 200d that operates according to refrigeration mode, shown in the double dot dash line arrow, thereby increased the refrigerant amount that flows into the indoor unit 200d that operates according to refrigeration mode, thereby increased refrigerating capacity.The cold-producing medium that has flowed into indoor unit 200d is by indoor motor-driven valve 202d and the indoor heat exchanger 201d of the indoor unit 200d that operates according to refrigeration mode, and then, LPP returns compressor 103 by the low-pressure gas pipeline.Cold-producing medium circulates by said process.
Under main heating mode, the outlet of compressor 103 keeps high pressure conditions.During operation, the open degree of 120 pairs of outdoor motor-driven valves 102 of outdoor control unit is controlled, thereby remains in the suitable pressure of cold-producing medium in the exit of compressor 103.
After this, will the method that be used to control above-mentioned multi-unit air conditioning system of the present invention be described in detail.
As shown in Figure 4, when multi-unit air conditioning system is powered, outdoor control unit 120 is carried out initialization (S401).According to the expectant control program, realize initialization automatically, so that carry out the air-conditioning operation.
After finishing initialization, independent indoor control unit 210a, 210b, 210c and 210d will be used to be provided with heating of indoor unit 200a, 200b, 200c and 200d or refrigeration mode operator scheme signal, indoor unit 200a, 200b, 200c and 200d indoor heat exchanger 201a, 201b, 201c and 201d the capacity that is provided with, temperature is set and indoor temperature offers outdoor control unit 120 by linkage unit 122.In addition, outdoor temperature sensor 108 offers outdoor control unit 120 (S403) with outdoor temperature.
Outdoor control unit 120 is calculated heating capacity (heating load) and refrigeration capacity (cooling load) according to the above-mentioned data that provide.Here, outdoor control unit 120 calculate the indoor unit that is set to heating mode heat total amount (HQ) and be set to refrigeration mode indoor unit refrigeration total amount (CQ) (S405).
Outdoor control unit 120 will freeze total amount (CQ) with heat total amount (HQ) and compare, thereby determine whether multi-unit air conditioning system operates (S407) according to main heating mode.Above-mentioned comparative result as step S407, under the situation that multi-unit air conditioning system is not operated according to main heating mode, outdoor control unit 120 according to corresponding operator scheme (promptly, single-mode, as refrigeration or heating mode, or main refrigeration mode) multi-unit air conditioning system is operated.
Above-mentioned comparative result as step S407, heat total amount (HQ) be higher than the refrigeration total amount (CQ) situation under, the operator scheme of multi-unit air conditioning system is set to main heating mode, and determines to heat percentage whether in the preset range of 50%～Hr (S409) under the main heating mode.Here, heat percentage represent to heat total amount with by freeze total amount and heat the percentage of the total capacity that the total amount addition obtains.Preferably, Hr is set to 82%.
Be under the situation in the preset range heating percentage, outdoor control unit 120 gauge tap valve operating units 132, thus open switch valve 119 (S411).Thus, the pressure among the fluid pipeline RP increases, thereby allows the cold-producing medium of greater number to flow into the indoor unit of operating according to refrigeration mode.
As above-mentioned definite result of step S409, be not under the situation in the preset range heating percentage, promptly be higher than under 82% the situation heating percentage, outdoor control unit 120 is closed switch valve 119 (S413).Here, the closing relatively to have increased of outdoor control unit 120 heats percentage, thereby it is more much higher than the refrigeration total amount to heat total amount, and reduced the required refrigerant amount of operating according to refrigeration mode of indoor unit, thereby the refrigerating capacity of the indoor unit of operating according to refrigeration mode and inadequate.
The open degree that control module 120 comes motor-driven valve 102 outside the control room according to the pressure of the cold-producing medium in 105 that provide by temperature sensor, as to be positioned at compressor 103 exit.After this, with reference to Fig. 5, the control of the open degree of the 120 pairs of outdoor motor-driven valves 102 in description control unit.
Outdoor control unit 120 is carried out initialization (S501).
After finishing initialization, independent indoor control unit 210a, 210b, 210c and 210d will be used to be provided with heating of indoor unit 200a, 200b, 200c and 200d or refrigeration mode operator scheme signal, indoor unit 200a, 200b, 200c and 200d indoor heat exchanger 201a, 201b, 201c and 201d the capacity that is provided with, temperature is set and indoor temperature offers outdoor control unit 120 by linkage unit 122.In addition, outdoor temperature sensor 108 offers outdoor control unit 120 (S503) with outdoor temperature.
Outdoor control unit 120 is according to the above-mentioned data that provide, calculate the indoor unit that is set to heating mode heat total amount (HQ) and be set to refrigeration mode indoor unit refrigeration total amount (CQ) (S505).
Outdoor control unit 120 will freeze total amount (CQ) with heat total amount (HQ) and compare, thereby determine whether multi-unit air conditioning system operates (S507) according to main heating mode.As the above-mentioned comparative result of step S507, under the situation that multi-unit air conditioning system is not operated according to main heating mode, outdoor control unit 120 is operated (S508) according to corresponding operator scheme to multi-unit air conditioning system.
Above-mentioned comparative result as step S507, heat total amount (HQ) be higher than the refrigeration total amount (CQ) situation under, the operator scheme of multi-unit air conditioning system is set to main heating mode, and according to the percentage that heats under the main heating mode, the open degree (S509) of outdoor motor-driven valve 102 is set.Here, heat percentage represent to heat total amount with by freeze total amount and heat the percentage of the total capacity that the total amount addition obtains.
Outdoor control unit 120 is determined open degree is set whether is lower than the first reference value K1 (S511) of outdoor motor-driven valves 102.Here, the first reference value K1 represents 20% open degree of outdoor motor-driven valve 102, and when the variable range of outdoor motor-driven valve 102 during in 0 (closing fully)～2000 (opening fully) level, corresponding to 400 grades.
The open degree of set outdoor motor-driven valve 102 is not less than under the situation of the first reference value K1 in step S511, outdoor control unit 120 is according to the degree of superheat of outdoor heat exchanger 101, the open degree of the outer motor-driven valve 102 of counting chamber, wherein basis is by the inlet temperatures of Tube Temperature Sensor 116 and 117 inputs and the degree of superheat that outlet temperature is calculated outdoor heat exchanger 101.Afterwards, execution in step S507.
The open degree of set outdoor motor-driven valve 102 is lower than under the situation of the first reference value K1 in step S511, and outdoor control unit 120 is determined open degree is set whether is higher than the second reference value K2 (S513) of outdoor motor-driven valves 102.Here, the second reference value K2 is lower than the first reference value K1, and when the variable range of outdoor motor-driven valve 102 during in 0 (closing fully)～2000 (opening fully) level, corresponding to 250 grades.Be set in the open degree of outdoor motor-driven valve under 250 grades the situation, too small by the refrigerant amount of outdoor motor-driven valve 102, and the substantial flow of cold-producing medium a little less than.
The open degree of set outdoor motor-driven valve 102 is higher than under the situation of the second reference value K2 in step S513, and outdoor control unit 120 is in preset time T1, average (S515) to the pressure of the cold-producing medium in the exit that is positioned at compressor 103 that sensed by pressure sensor 105.Preferably, described preset time T1 is 20 seconds.
Afterwards, whether the average pressure of the cold-producing medium in the exit that is positioned at compressor 103 that is obtained among the determining step S515 is higher than the predetermined value (S517) that is provided with in order to control compressor 103.Here, by designated value (A) and goal pressure (Pt) addition are obtained described predetermined value.
Average pressure at the cold-producing medium in the exit that is positioned at compressor 103 is higher than under the situation of predetermined value (Pt+A), and outdoor control unit 120 increases the open degree of outdoor motor-driven valve 102 with the speed of appointment, for example, increases by 5 grades (S519).Thus, increased refrigerant amount, and reduced the pressure of compressor 103 by outdoor unit 101 and outdoor motor-driven valve 102.Afterwards, execution in step S507.
Average pressure at the cold-producing medium in the exit that is positioned at compressor 103 is not higher than under the situation of predetermined value (Pt+A), (2 minutes) in the given time, whether the pressure of cold-producing medium of determining to be positioned at the exit of compressor 103 is lower than goal pressure, and for last 20 seconds in the described scheduled time (2 minutes), whether the average pressure of cold-producing medium that is positioned at the exit of compressor 103 was lower than goal pressure (Pt) (S521).As above-mentioned definite result, be lower than at average pressure under the situation of goal pressure (Pt), outdoor control unit 120 reduces the open degree of outdoor motor-driven valve 102 with the speed of appointment, for example, reduces 5 grades (S523).Thus, reduced refrigerant amount, and increased the pressure of compressor 103 by outdoor unit 101 and outdoor motor-driven valve 102.Afterwards, execution in step S507.
The open degree of set outdoor motor-driven valve 102 is not higher than under the situation of the second reference value K2 in step S513, promptly the open degree of outdoor motor-driven valve 102 less than 250 grades situation under, refrigerant amount by outdoor motor-driven valve 102 is too small, and the substantial flow of cold-producing medium a little less than.Therefore, the open degree of outdoor control unit 120 outdoor motor-driven valves 102 is set to the first reference value K1, and keeps the first reference value K1 preset time T2 (S514).Preferably, described preset time T2 is 2 minutes.Afterwards, execution in step S507.
As seen from the above description, the invention provides a kind of multi-unit air conditioning system, wherein between gases at high pressure pipeline and fluid pipeline, bypass channel is installed, thereby the pressure in the fluid pipeline is increased, and the refrigerant amount that flows into the indoor unit of operating according to refrigeration mode increases, thereby can not worsen the refrigerating capacity of the indoor unit of operating according to refrigeration mode; And a kind of method that is used to control described system, thereby when described system operates according to main heating mode, improve the performance of the indoor unit of operating according to refrigeration mode.
In addition, the open degree of the outdoor motor-driven valve of the outdoor unit of control multi-unit air conditioning system, thereby when being lower than predetermined value according to the open degree that heats the outdoor motor-driven valve that percentage is provided with under the main heating mode, the pressure of cold-producing medium that is positioned at the exit of compressor is in suitable scope, thus can be in the short time period systems stabilisation.
Although illustrated and described embodiments of the invention, but those of ordinary skill in the art should be understood that, can change present embodiment, and not depart from principle of the present invention and spirit, scope of the present invention is limited by claim and equivalent thereof.

Claims (11)

1, a kind of multi-unit air conditioning system, it has: be connected the refrigerant distributor between outdoor unit and a plurality of indoor unit, be used to control flowing of cold-producing medium, carry out refrigeration simultaneously and heat operation; Described system comprises:
Compressor;
Outdoor heat exchanger;
Be connected the outlet of compressor and the gases at high pressure pipeline between the indoor unit;
Be connected the fluid pipeline between outdoor heat exchanger and the indoor unit;
Be connected the bypass loop between gases at high pressure pipeline and the fluid pipeline; And
Control module is used for according to operating condition, uses bypass loop, controls the refrigerant amount of the indoor unit that inflow operates according to refrigeration mode.
2, multi-unit air conditioning system according to claim 1, it is characterized in that the refrigeration total amount that total amount is higher than the indoor unit of operating according to refrigeration mode that heats at the indoor unit of operating according to heating mode, and heat under the situation of percentage in preset range, control module increases the refrigerant amount that flows into the indoor unit of operating according to refrigeration mode.
3, multi-unit air conditioning system according to claim 1 is characterized in that:
Bypass loop comprises: bypass channel, and an end links to each other with the gases at high pressure pipeline, and the other end links to each other with fluid pipeline; And be installed in valve on the bypass channel, be used to control the pressure of fluid pipeline; And
Control module is opened described valve, to increase the refrigerant amount that flows into the indoor unit of operating according to refrigeration mode.
4, multi-unit air conditioning system according to claim 1 is characterized in that also comprising the outdoor motor-driven valve that links to each other with outdoor heat exchanger with compressor sensor, and described compressor sensor is used for the pressure of cold-producing medium that sensing is positioned at the exit of compressor,
And under the situation of open degree at preset range by the set outdoor motor-driven valve of the refrigeration total amount of the indoor unit that heats total amount and operate according to refrigeration mode of the indoor unit of operating according to heating mode, the open degree that control module comes motor-driven valve outside the control room according to the pressure of the cold-producing medium in the exit that is positioned at compressor.
5, multi-unit air conditioning system according to claim 4,
It is characterized in that control module is higher than under the situation of preset range at the pressure of the cold-producing medium in the exit that is positioned at compressor, increase the open degree of outdoor motor-driven valve, and be lower than under the situation of preset range at the pressure of the cold-producing medium in the exit that is positioned at compressor, reduce the open degree of outdoor motor-driven valve.
6, multi-unit air conditioning system according to claim 5,
It is characterized in that control module will compare by within the predetermined time the pressure of the cold-producing medium in the exit that is positioned at compressor being averaged the average pressure and the preset range that obtain.
7, a kind of method that is used to control multi-unit air conditioning system, a plurality of indoor units that are used to allow to link to each other with outdoor unit are carried out refrigeration simultaneously and are heated operation, and described method comprises:
According to the refrigeration total amount of the indoor unit that heats total amount and operate according to refrigeration mode of the indoor unit of operating according to heating mode, setting operation pattern; And
Operate according to heating mode for the indoor unit of a greater number wherein in set operator scheme under the situation of the main heating mode that less indoor unit operates according to refrigeration mode, when by heat total amount and refrigeration total amount set heat percentage in predetermined scope the time, the cold-producing medium that allows part will offer the indoor unit of operating according to heating mode flows into the indoor unit of operating according to refrigeration mode.
8, method according to claim 7 is characterized in that described preset range is higher than 50% and be lower than 82%.
9, method according to claim 7, it is characterized in that sensing is positioned at the pressure of cold-producing medium in the exit of compressor, and in the operating period of main heating mode, according to the refrigerant pressure that is sensed, the open degree of the outdoor motor-driven valve that control links to each other with outdoor heat exchanger.
10, method according to claim 9, it is characterized in that being higher than under the situation of preset range at the pressure of the cold-producing medium in the exit that is positioned at compressor, increase the open degree of outdoor motor-driven valve, and be lower than under the situation of preset range at the pressure of the cold-producing medium in the exit that is positioned at compressor, reduce the open degree of outdoor motor-driven valve.
11, method according to claim 10 is characterized in that comparing averaging the average pressure and the preset range that obtain by the pressure to the cold-producing medium in the exit that is positioned at compressor.
CNA200510009062XA 2004-10-06 2005-02-17 Multi-unit air conditioning system and be used to control the method for this system Pending CN1757990A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040079624A KR20060030761A (en) 2004-10-06 2004-10-06 Multi type air conditioning system and thereof method
KR20040079624 2004-10-06

Publications (1)

Publication Number Publication Date
CN1757990A true CN1757990A (en) 2006-04-12

Family

ID=36703488

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA200510009062XA Pending CN1757990A (en) 2004-10-06 2005-02-17 Multi-unit air conditioning system and be used to control the method for this system

Country Status (3)

Country Link
EP (1) EP1645810A3 (en)
KR (1) KR20060030761A (en)
CN (1) CN1757990A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101960235B (en) * 2008-02-29 2013-01-02 大金工业株式会社 Refrigeration device
CN103388856A (en) * 2013-07-18 2013-11-13 广东美的暖通设备有限公司 Multi-split air conditioner system and quick-starting heat generation method
CN104296238A (en) * 2013-07-18 2015-01-21 广东美的暖通设备有限公司 Three-pipe heating recovery air-conditioning system and dehumidification method thereof
CN106016457A (en) * 2016-05-23 2016-10-12 广东美的暖通设备有限公司 Multi-split system and control method for heating throttling element thereof
CN109237703A (en) * 2018-08-20 2019-01-18 青岛海尔空调电子有限公司 Control method for multi-online air-conditioning system
CN109237704A (en) * 2018-08-20 2019-01-18 青岛海尔空调电子有限公司 Control method for multi-online air-conditioning system
CN109425062A (en) * 2017-08-31 2019-03-05 三星电子株式会社 Air-conditioning
CN110500667A (en) * 2018-05-18 2019-11-26 广东Tcl智能暖通设备有限公司 A kind of multi-joint indoor unit noise-reduction method, air-conditioning system and storage medium

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4389927B2 (en) * 2006-12-04 2009-12-24 ダイキン工業株式会社 Air conditioner
KR101151321B1 (en) * 2007-02-06 2012-06-08 삼성전자주식회사 Multi system air conditioner and control method thereof
KR101176635B1 (en) * 2007-06-22 2012-08-24 삼성전자주식회사 Multi air conditioner capable of heating and cooling simultaneously and control method thereof
KR101035384B1 (en) * 2008-12-04 2011-05-20 엘지전자 주식회사 Multi-type air conditioner and Control method of the same
JP5283587B2 (en) * 2009-08-28 2013-09-04 三洋電機株式会社 Air conditioner
CN101865555B (en) * 2010-06-29 2012-10-03 广东志高空调有限公司 Multi-split air-conditioner capable of simultaneously refrigerating and heating
KR102146371B1 (en) 2013-09-25 2020-08-20 삼성전자주식회사 Air Conditioner
CN106225312B (en) * 2016-08-19 2019-04-02 广东美的暖通设备有限公司 Multi-line system and its pressure release control method
CN112944453B (en) * 2021-02-26 2023-03-31 青岛海尔空调电子有限公司 Control method of three-pipe multi-split air conditioning unit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03236570A (en) * 1990-02-14 1991-10-22 Toshiba Corp Air-conditioner
JPH05149605A (en) * 1991-11-30 1993-06-15 Toshiba Corp Air conditioner
KR100437805B1 (en) * 2002-06-12 2004-06-30 엘지전자 주식회사 Multi-type air conditioner for cooling/heating the same time and method for controlling the same
KR100447204B1 (en) 2002-08-22 2004-09-04 엘지전자 주식회사 Multi-type air conditioner for cooling/heating the same time and method for controlling the same
KR20040064452A (en) 2003-01-13 2004-07-19 엘지전자 주식회사 Multi-type air conditioner for cooling/heating the same time
KR101003356B1 (en) 2003-10-21 2010-12-23 삼성전자주식회사 Air Conditioner And Control Method Thereof
KR20050075976A (en) 2004-01-19 2005-07-26 삼성전자주식회사 Air conditioning system and control method thereof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101960235B (en) * 2008-02-29 2013-01-02 大金工业株式会社 Refrigeration device
CN103388856A (en) * 2013-07-18 2013-11-13 广东美的暖通设备有限公司 Multi-split air conditioner system and quick-starting heat generation method
CN104296238A (en) * 2013-07-18 2015-01-21 广东美的暖通设备有限公司 Three-pipe heating recovery air-conditioning system and dehumidification method thereof
CN103388856B (en) * 2013-07-18 2015-09-30 广东美的暖通设备有限公司 Multi-online air-conditioning system and start heating method fast
CN106016457A (en) * 2016-05-23 2016-10-12 广东美的暖通设备有限公司 Multi-split system and control method for heating throttling element thereof
CN106016457B (en) * 2016-05-23 2018-12-18 广东美的暖通设备有限公司 Multi-line system and its control method for heating restricting element
CN109425062A (en) * 2017-08-31 2019-03-05 三星电子株式会社 Air-conditioning
CN109425062B (en) * 2017-08-31 2021-04-06 三星电子株式会社 Air conditioner
CN110500667A (en) * 2018-05-18 2019-11-26 广东Tcl智能暖通设备有限公司 A kind of multi-joint indoor unit noise-reduction method, air-conditioning system and storage medium
CN109237704A (en) * 2018-08-20 2019-01-18 青岛海尔空调电子有限公司 Control method for multi-online air-conditioning system
CN109237703A (en) * 2018-08-20 2019-01-18 青岛海尔空调电子有限公司 Control method for multi-online air-conditioning system
CN109237704B (en) * 2018-08-20 2021-09-21 青岛海尔空调电子有限公司 Control method for multi-split air conditioning system
CN109237703B (en) * 2018-08-20 2021-09-21 青岛海尔空调电子有限公司 Control method for multi-split air conditioning system

Also Published As

Publication number Publication date
EP1645810A3 (en) 2006-05-24
KR20060030761A (en) 2006-04-11
EP1645810A2 (en) 2006-04-12

Similar Documents

Publication Publication Date Title
CN1757990A (en) Multi-unit air conditioning system and be used to control the method for this system
CN1255655C (en) Air conditioner and method for controlling electronic expansion valve of same
CN1324272C (en) Air conditioner and method for controlling the same
CN107084483B (en) Air conditioner and control method
KR101203579B1 (en) Speed heating apparatus with air conditioner and Control process of the same
CN1261724C (en) Air conditioner and method for controlling electronic expansion valve of same
CN101495816B (en) Air conditioner
CN107023960B (en) floor heating type air conditioner and control method
CN1310000C (en) Air conditioner
CN1786602A (en) Multi-air conditioning system and valve opening controlling method thereof
EP2006615A2 (en) Multi air-conditioner for simultaneously cooling/heating room air and method for controlling the same
US9175890B2 (en) Outdoor unit for air-conditioning apparatus, and air-conditioning apparatus
CN1793744A (en) Air conditioner
CN101065623A (en) Air conditioner
JP2012141113A (en) Air conditioning/water heating device system
CN107014038B (en) Air conditioner and control method
JP7148344B2 (en) air conditioner
WO2015122171A1 (en) Air conditioning device
CN1789845A (en) Method for operating an air conditioner
CN100347490C (en) Multi-stage operation type air conditioner and operating method thereof
JPWO2019224945A1 (en) Refrigeration cycle equipment
JPWO2020161805A1 (en) Air conditioner control device, outdoor unit, repeater, heat source unit and air conditioner
KR20050075976A (en) Air conditioning system and control method thereof
KR20100064835A (en) Air conditioner
JP2012107790A (en) Air conditioning device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication