CN1477345A - Multimachine air conditioner and operating method for controlling outdoor machine fan - Google Patents

Multimachine air conditioner and operating method for controlling outdoor machine fan Download PDF

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Publication number
CN1477345A
CN1477345A CNA031084974A CN03108497A CN1477345A CN 1477345 A CN1477345 A CN 1477345A CN A031084974 A CNA031084974 A CN A031084974A CN 03108497 A CN03108497 A CN 03108497A CN 1477345 A CN1477345 A CN 1477345A
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CN
China
Prior art keywords
premises station
rooms
bypass pipe
refrigerant
heat exchanger
Prior art date
Application number
CNA031084974A
Other languages
Chinese (zh)
Other versions
CN1239854C (en
Inventor
朴锺汉
朴荣民
李昌宣
崔圣吾
Original Assignee
Lg电子株式会社
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
Priority to KR10-2002-0049751A priority Critical patent/KR100447203B1/en
Priority to KR49751/2002 priority
Priority to KR49751/02 priority
Application filed by Lg电子株式会社 filed Critical Lg电子株式会社
Publication of CN1477345A publication Critical patent/CN1477345A/en
Application granted granted Critical
Publication of CN1239854C publication Critical patent/CN1239854C/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00Air-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
    • F24F3/06Air-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
    • F24F3/065Air-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B13/00Compression machines, plant or systems with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00Details or features not otherwise provided for
    • F24F2221/54Heating and cooling, simultaneously or alternatively
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/006Compression machines, plant, or systems with reversible cycle not otherwise provided for two pipes connecting the outdoor side to the indoor side with multiple indoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/023Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0231Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/027Compression machines, plant, or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02791Compression machines, plant, or systems with reversible cycle not otherwise provided for characterised by the reversing means using shut-off valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/029Control issues
    • F25B2313/0294Control issues related to the outdoor fan, e.g. controlling speed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/031Sensor arrangements
    • F25B2313/0315Temperature sensors near the outdoor heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General 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
    • F25B2400/23Separators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/19Calculation of parameters

Abstract

Multi-unit air conditioner for independent cooling/heating of each room including an outdoor unit, a distributor and a plurality of indoor units, wherein the outdoor unit and the distributor are connected with two piping specifically defined as a high pressure section and a low pressure section. The outdoor unit includes an outdoor unit piping for connecting different elements, a bypass piping for bypassing refrigerant depending on operation a condition, arid a plurality of refrigerant flow control valves for controlling a refrigerant flow. The distributor includes a gas-liquid separator for separating the refrigerant into gas refrigerant and liquid refrigerant, for selectively leading refrigerant from the outdoor unit to a plurality of indoor units according to different operation conditions for independent cooling and heating of each room. Method for controlling operation of an outdoor unit fan in a multi-unit air conditioner includes the steps of measuring a temperature of gas-liquid mixture refrigerant from an outdoor unit heat exchanger, comparing a measured refrigerant temperature and a preset refrigerant temperature, to detect a gas-refrigerant mixture ratio of the refrigerant, and varying a rotational speed of an outdoor unit fan so that a detected gas-liquid mixture ratio is identical to a preset gas-liquid mixture ratio required for an intended operation condition.

Description

Multimachine air-conditioner and be used to control the method for operating of its outdoor machine fan
Technical field
The present invention relates to a kind of multimachine air-conditioner.
Background technology
Usually, air-conditioner is a kind ofly to be used to cool off or the equipment of heating space environment, as living space, restaurant and office.Now, in order effectively to cool off or to heat the space that is divided into a plurality of rooms, constantly develop the multimachine air-conditioner and become trend.The multimachine air-conditioner provides an off-premises station and a plurality of indoor set usually, and their each indoor sets all link to each other with off-premises station, and be installed in indoor, with when operating in one of refrigeration mode or heating mode the cooling or the heating interior space.
Yet, even a room in a plurality of rooms in the partition space need heat, and other rooms need refrigeration, multimachine air-conditioner also can only operate refrigeration uniformly or heat in a pattern, therefore, there is the restriction of the needs that can not suitably solve in this respect on the demand in the multimachine air-conditioner.
For example, even in building, the position in room and asynchronism(-nization), the temperature in room is also different, as, when the room, north side need heat, the room, southern side was owing to solar radiation needs refrigeration, this be to use prior art only the multimachine air-conditioner of executable operations cann't be solved under single-mode.
In addition, even be equipped with the building of computer room to need not only to freeze in summer, and also refrigeration in the winter time, with the problem of the thermic load that solves computer-related devices, the multimachine air-conditioner of prior art can not suitably solve this needs.
In a word, need the exploitation multimachine air-conditioner of refrigerating/heating type simultaneously, with each room temperature of difference air conditioning, promptly, be installed in the indoor set that indoor needs heat and operate under heating mode, simultaneously, the indoor set that is installed in indoor needs refrigeration is operated under refrigeration mode.
Summary of the invention
Therefore, the invention provides a kind of multimachine air-conditioner, it has eliminated the one or more problems that caused by the limitation of prior art and shortcoming substantially.
One object of the present invention is to provide a kind of multimachine air-conditioner, and it can be simultaneously carries out suitable heat and freezing to each room individually.
Another object of the present invention is to provide a kind of multimachine air-conditioner, wherein,, reduced the connecting duct between distributor and the off-premises station for the ease of installing.
A further object of the present invention has been to provide a kind of method of operating that is used to control the multimachine air-conditioner, and it can be by optimizing the gas-liquid mixed of the cold-producing medium that enters gas-liquid separator than the efficient that improves air conditioning under the operating condition that heats the minority room in freeze all rooms or most of rooms that freeze.
Other characteristics of the present invention and advantage will be more obvious by following description, or be easier to understand by practice of the present invention.Purpose of the present invention and other advantages will realize and obtain by concrete structure pointed in specification and claim and the accompanying drawing.
In order to realize these and other advantages, according to purpose of the present invention, as described in concrete and summary, multimachine air-conditioner of the present invention comprises: off-premises station, off-premises station comprises: the accumulator that is linked in sequence with the off-premises station conduit, compressor and off-premises station heat exchanger, the off-premises station electric expansion valve parallel of the outlet side of off-premises station heat exchanger with the off-premises station conduit, bypass pipe, be used for to be diverted to the outside of off-premises station by the cold-producing medium of compressor, the cold-producing medium in the off-premises station outside is diverted to off-premises station electric expansion valve, and the cold-producing medium that will enter the compressor outlet side is diverted to the entrance side of compressor, with a plurality of refrigerant flow control valves on off-premises station conduit and the bypass pipe, be used to control the flow of cold-producing medium; Indoor set in each room, they each all include heat exchanger indoor unit and indoor set electric expansion valve; With the distributor that comprises gas-liquid separator, be used for to be separated into gaseous refrigerant and liquid refrigerant by the cold-producing medium that off-premises station obtains, the guiding gaseous refrigerant enters the heat exchanger indoor unit of the indoor set that the room is heated, direct liquid refrigerant enters the indoor set electric expansion valve to the indoor set of room refrigeration, and the guiding cold-producing medium flows to off-premises station by indoor set, wherein, if to freezing respectively and heat in each room, the cold-producing medium that liquefies when the indoor set by the room is heated will be directed to the electric expansion valve to the indoor set of room refrigeration once more before guiding to off-premises station.
The multimachine air-conditioner also comprises control device, is used to control the rotary speed of outdoor machine fan, is suitable for different operating conditions so that process off-premises station heat exchanger enters the gas-liquid mixed of the cold-producing medium of gas-liquid separator than being adjusted to.Control device comprises: the supravasal temperature sensor of off-premises station that is provided at the off-premises station heat exchanger side, be used to measure the temperature of the cold-producing medium that obtains by the off-premises station heat exchanger, and microcomputer, be used for refrigerant temperature and predetermined refrigerant temperature that comparison records at temperature sensor, with the ratio of the refrigerant mixed in the detected catheter, and the rotary speed of control outdoor machine fan, so that the required predetermined mix of the mixing ratio that detects and the operating condition of setting is than identical.
The off-premises station conduit comprises: be connected the discharge pipe between the inlet of compressor outlet and off-premises station heat exchanger; Be connected the mistake conduit between the inlet of the outlet of off-premises station heat exchanger and gas-liquid separator; And be connected suction line between the inlet of the outlet of distributor and compressor.
Bypass pipe comprises: be connected first bypass pipe between discharge pipe and the mistake conduit; Be connected discharge pipe at part between first bypass pipe and the off-premises station heat exchanger and second bypass pipe between the suction line; And be connected part and suction line three bypass pipe part second bypass pipe and export distributor between between of conduit between the off-premises station heat exchanger and first bypass pipe.
The refrigerant flow control valve comprises: the first ON/OFF magnetic valve between first bypass pipe and second bypass pipe on the discharge pipe; The second ON/OFF magnetic valve between second bypass pipe and the 3rd bypass pipe on the suction line; Supravasal the 3rd ON/OFF magnetic valve between first bypass pipe and the 3rd bypass pipe of overcurrent; The 4th ON/OFF magnetic valve on first bypass pipe; The 5th ON/OFF magnetic valve on second bypass pipe; The 6th ON/OFF magnetic valve on the 3rd bypass pipe; The supravasal check valve between the 3rd bypass pipe and off-premises station heat exchanger of overcurrent is used to prevent that cold-producing medium is from the 3rd bypass pipe flowing to the Way out of off-premises station heat exchanger.
First, second and the 3rd ON/OFF magnetic valve are in all rooms of refrigeration and freeze most of rooms and heat and open in the operating process in minority room, heating all rooms and heating most of rooms and close in the operating process in the minority room that freezes, four, the 5th and the 6th ON/OFF magnetic valve is in all rooms of refrigeration and freeze most of rooms and heat and cut out in the operating process in minority room, heating all rooms and heating most of rooms and open in the operating process in the minority room that freezes.
The refrigerant flow control valve comprises: be provided at first triple valve on the discharge pipe and the first bypass pipe intersection point; Be provided at second triple valve on suction line and the 3rd bypass pipe intersection point; Be provided at the seven ON/OFF magnetic valve of conduit on the part between first bypass pipe and the 3rd bypass pipe; Be provided at the 8th ON/OFF magnetic valve on second bypass pipe; And be provided at the upper check valve between the 3rd bypass pipe and off-premises station heat exchanger of conduit, be used to prevent that cold-producing medium is from the 3rd bypass pipe flowing to the Way out of off-premises station heat exchanger.
Like this control first triple valve: flow into the off-premises station heat exchanger even cold-producing medium heats in all rooms of refrigeration and the most of rooms of refrigeration in the operating process in minority room, heating all rooms and heating most of rooms and flow into first bypass pipe in the operating process in the minority room that freezes.Like this control second three-way pipe: flow into compressor even cold-producing medium heats in all rooms of refrigeration and the most of rooms of refrigeration in the operating process in minority room, heating all rooms and heating most of rooms and flow into the 3rd bypass pipe in the operating process in the minority room that freezes.The 7th ON/OFF magnetic valve heats in all rooms of refrigeration and the most of rooms of refrigeration and opens in the operating process in minority room, is heating all rooms and is heating most of rooms and close in the operating process in the minority room that freezes.The 8th ON/OFF magnetic valve heats in all rooms of refrigeration and the most of rooms of refrigeration and cuts out in the operating process in minority room, is heating all rooms and is heating most of rooms and open in the operating process in the minority room that freezes.
Off-premises station electric expansion valve is provided on the parallel conduits, and this parallel conduits was provided on the conduit, and is parallel with check valve.Off-premises station electric expansion valve heats in all rooms of refrigeration and the most of rooms of refrigeration and cuts out in the operating process in minority room, is heating all rooms and is heating most of rooms and open in the operating process in the minority room that freezes.Accumulator is provided to the part of suction line between second bypass pipe and compressor.
Distributor comprises: gas-liquid separator has the mistake conduit in the connected off-premises station heat exchanger; Distributor pipes is used to guide gaseous state or liquid refrigerant in gas-liquid separator separates to flow to indoor pusher side, and the cold-producing medium of guiding process indoor set flows to off-premises station once more; And valve portion, be used for flowing at distributor pipes according to the operating condition control cold-producing medium of hope.
Distributor pipes comprises: the gaseous refrigerant conduit is used for guiding the gaseous refrigerant that separates at gas-liquid separator; A plurality of gaseous refrigerant arms, each is all come out by the gaseous refrigerant conduit branch, and is connected to the heat exchanger indoor unit of each indoor set; The liquid refrigerant conduit is used to guide the liquid refrigerant in gas-liquid separator separates; A plurality of liquid refrigerant arms, each is all come out by the liquid refrigerant conduit branch, and is connected to the indoor set electric expansion valve on each indoor set; A plurality of loops arm, each is all come out by gaseous refrigerant arm branch; Return pipe connects together the loop arm, and is connected to suction line; With the distributor bypass pipe, be connected between the bottom and return pipe of gas-liquid separator.
Valve portion comprises: a plurality of being provided on gaseous refrigerant arm, liquid refrigerant arm and the loop arm and controlled ON/OFF control valve and be provided on the distributor bypass pipe and controlled the 9th ON/OFF magnetic valve.Dispenser valve is partly so controlled the ON/OFF closed electromagnetic valve on the gaseous refrigerant arm that makes the ON/OFF control valve on the cold-producing medium connecting leg that is provided at the indoor pusher side that the room is heated and be provided at the indoor pusher side that the room is freezed.
According to a further aspect in the invention, provide a kind of method of operating that is used to control outdoor machine fan in the multimachine air-conditioner, comprised the steps: to measure the temperature of the gas-liquid mixed refrigerant that obtains by the off-premises station heat exchanger; Refrigerant temperature and the pre-customized refrigerant temperature measured are compared, to detect the gaseous refrigerant mixing ratio of cold-producing medium; With the rotary speed that changes outdoor machine fan so that the gas-liquid mixed that detects than with the required predetermined gas-liquid mixed of scheduled operation condition than identical.
Should be appreciated that above-mentioned general description and following specific descriptions all are exemplary and illustrative, be used to provide further explanation of the present invention.
Description of drawings
Accompanying drawing comprised wherein understanding the present invention better, and combined and constitute the part of this specification, and accompanying drawing, embodiments of the invention and explanation are used to explain principle of the present invention:
In the accompanying drawings:
Fig. 1 is the circuit diagram of multimachine air-conditioner according to a first advantageous embodiment of the invention;
Fig. 2 A shows the circuit diagram of the mode of operation of the multimachine air-conditioner shown in Fig. 1 when all rooms all freeze;
Fig. 2 B shows the circuit diagram of the mode of operation of the multimachine air-conditioner shown in Fig. 1 when all rooms all heat;
Fig. 3 A shows when most of rooms refrigeration, when the minority room heats, and the circuit diagram of the mode of operation of the multimachine air-conditioner shown in Fig. 1;
Fig. 3 B shows when most of rooms and heats, during minority room refrigeration, and the circuit diagram of the mode of operation of the multimachine air-conditioner shown in Fig. 1; And
Fig. 4 is the circuit diagram of multimachine air-conditioner according to a second, preferred embodiment of the present invention.
The specific embodiment
Describe the preferred embodiments of the present invention now in detail, be described in the drawings the example.In the description to embodiments of the invention, identical part has identical title and identical Reference numeral, and its associated description is omitted.
With reference to figure 1, air-conditioner according to a preferred embodiment of the invention comprises off-premises station " A ", distributor " B " and a plurality of indoor set " C "; " C1 ", " C2 " and " C3 ", wherein, air-conditioner has a kind of like this system: wherein, according to cooling off all rooms, heating all rooms, the most of rooms of cooling are with heating minority room and heat most of rooms and these different operating conditions of cooling minority room, indoor set " C "; " C1 ", " C2 " and " C3 " are mounted respectively wherein the room of cooling independently or heating, are described in greater detail with reference now to Fig. 1.
For the ease of narration, following Reference numeral 22 is represented 22a, 22b and 22c, and 24 represent 24a, 24b and 24c, 25 represent 25a, 25b and 25c, and 31 represent 31a, 31b and 31c, and 61 represent 61a, 61b and 61c, 62 represent 62a, 62b and 62c, and C represents C1, C2 and C3.Certainly, the quantity of indoor set " C " changes along with the change of the quantity in room with the quantity of the element relevant with indoor set, for the ease of narration, supposes that room quantity is that three situation is described the present invention.
Off-premises station " A " comprises a plurality of flow control valves on compressor 1, off-premises station heat exchanger 2 and outdoor machine fan 2a, gas-liquid separator 3, off-premises station electric expansion valve 13a, accumulator 19, off-premises station connecting leg, bypass pipe and off-premises station connecting leg and the bypass pipe, describes detailed system in detail with reference now to Fig. 1 and constitutes.
With reference to figure 1, compressor 1 and off-premises station heat exchanger 2 are connected to discharge pipe 3.Provide outdoor machine fan 2a air being blown to off-premises station heat exchanger 2, thus cooling off-premises station heat exchanger 2.Compressor 1 has the suction line 5 that is connected to its air inlet side, and accumulator 19 is on suction line 5.
Cross conduit 4 and be connected to the outlet of off-premises station heat exchanger 2, parallel conduits 15 branches away from a point crossing conduit 4, and is connected on another aspect of conduit 4, thus the formation by-pass.Off-premises station electric expansion valve 15a is on parallel conduits 15, so that off-premises station electric expansion valve 13a freezes in all rooms, close when most of room refrigeration and minority room heat, all heat in all rooms, most of room heats and work during minority room refrigeration.
Check valve (check valve) 14 is being crossed on the conduit 4, between a point that connects parallel conduits 15 thereon and another point.Check valve 14 allows cold-producing medium to flow to distributor " B " from off-premises station heat exchanger 2, stops cold-producing medium rightabout mobile.
First bypass pipe 11 was connected between the point of point of conduit 4 and discharge pipe 3.The 4th magnetic valve 11a is on first bypass pipe 11.Second bypass pipe 12 is so provided and is connected, and makes accumulator 19 between the compressor 1 and second bypass pipe 12.The 5th magnetic valve 12a is provided on second bypass pipe 12.
The first magnetic valve 3a is provided on the discharge pipe 3, between first bypass pipe, 11 connected points and second bypass pipe, 12 connected another points.
The part between second bypass pipe 12 and distributor " B " outlet is connected with the 3rd bypass pipe 13 in part between the off-premises station heat exchanger 2 and first bypass pipe 11 and suction line 5 to cross conduit 4.The 3rd bypass pipe 13 is so provided and is connected, and makes check valve 14 and parallel conduits 15 between the 3rd bypass pipe 13 self and off-premises station heat exchanger 2.The 6th magnetic valve 13a is provided on the 3rd bypass pipe 13.
The 3rd magnetic valve 4a is crossing on the conduit 4, connects point on it at first bypass pipe 11 and is connected with the 3rd bypass pipe 13 between on it another put.The second magnetic valve 5a is provided on the suction line 5, connects point on it at the 3rd bypass pipe 13 and is connected with second bypass pipe 12 between on it another put.
Flow control valve with six magnetic valves is so controlled, make first, second and the 3rd magnetic valve 3a, 5a and 4a all freeze and most of room refrigeration and opening under the situation that the minority room heats in all rooms, all heat in all rooms and to heat with most of rooms and close under the situation of minority room refrigeration, four, the 5th and the 6th magnetic valve 11a, 12a and 13a freeze in all rooms and most of room refrigeration and closing under the situation that the minority room heats, all heat in all rooms to heat with most of rooms and open under the situation of minority room refrigeration.
Below, with reference to figure 1, distributor " B " comprises gas-liquid separator 40, distributor connecting leg 20 and valve part 30.
Gas-liquid separator 40 has an import and three outlets, and wherein import is connected to the mistake conduit in the off-premises station " A ", and three outlets are connected respectively to liquid refrigerant conduit 23, gaseous refrigerant conduit 21 and the distributor bypass pipe 27 in the distributor pipes 20.Gas-liquid separator 40 will be separated into liquid refrigerant and gaseous refrigerant by the cold-producing medium of crossing the two states that conduit 4 receives, and be discharged into liquid refrigerant conduit 23 and gaseous state coolant conduits 21 respectively.Certainly, if gas-liquid separator 40 by crossing the cold-producing medium that conduit 4 receives a kind of state in gaseous state or the liquid state, cold-producing medium that then will this a kind of state directly is discharged into gaseous refrigerant conduit 21 or liquid refrigerant conduit 23.
Simultaneously, distributor pipes 20 conducts liquid or gaseous refrigerant flow to indoor set " C " from gas-liquid separator 40, and the guiding cold-producing medium flows into off-premises station " A " from indoor set " C ".Distributor pipes 20 comprises gaseous refrigerant conduit 21, gaseous refrigerant arm 22, liquid refrigerant conduit 23, liquid refrigerant arm 24, return pipe 26 and distributor bypass pipe 27, and its detailed annexation is as described below.
Liquid refrigerant conduit 23 and distributor bypass pipe 27 are connected to the outlet of the gas-liquid separator 40 of bottom, and liquid refrigerant conduit 21 is connected to the outlet on the top of gas-liquid separator 40.
With reference to figure 1, a plurality of liquid refrigerant arms 22 are come out by gaseous refrigerant conduit 21 branches, be connected respectively to the indoor heat converter 62 of indoor set " C ", a plurality of liquid refrigerant arms 24 are come out by liquid refrigerant conduit 23 branches, are connected to the indoor set electric expansion valve 61 in the indoor set " C ".
With reference to figure 1, loop arm 25 is come out by each gaseous refrigerant arm 22 branch, and return pipe 26 links together with the loop arm 25 that is come out by gaseous refrigerant arm 22 branches, and links to each other with suction line 5 in the off-premises station " A ".
With reference to figure 1, distributor bypass pipe 27 so is provided, make the bottom of gas-liquid separator 40 link to each other with return pipe 26, the 9th magnetic valve 32 is positioned on the distributor arm 27.
Valve part 30 is used for the flow of the cold-producing medium of control dispenser conduit 20, so that gaseous state or liquid refrigerant can be according to all rooms of refrigeration, heat all rooms, the most of rooms of refrigeration and heat the minority room, heat most of rooms these different operating conditions of minority room of freezing and be directed into selectively in the indoor set " C ", and make to be returned and guide to off-premises station " A " through the gaseous state of indoor set " C " or liquid refrigerant.
With reference to figure 1, valve part 30 comprises gaseous refrigerant arm 22, liquid refrigerant arm 24 and a plurality of ON/OFF control valve 31:31a, 31b and 31c that is provided to return pipe 25.In a plurality of ON/OFF control valves 31, the ON/OFF control valve on the loop arm 25 on the indoor pusher side that the room is heated and only the ON/OFF control valve on the liquid refrigerant arm 22 on the indoor pusher side of room heating is controlled it and close only, the detailed control operation of carrying out according to different operating conditions will be described below.
Next, indoor set " C " is installed in each room, and it comprises heat exchanger indoor unit 62, indoor set electric expansion valve 61 and indoor machine fan (not shown).
Heat exchanger indoor unit 62 is connected respectively to the gaseous refrigerant arm 22 in the distributor " B ", and indoor set electric expansion valve 61 is connected respectively to the liquid refrigerant arm 24 in the distributor.Heat exchanger indoor unit 62 links to each other with coolant conduits respectively with indoor set electric expansion valve 61.
Indoor machine fan is blown into air heat exchanger indoor unit 62 respectively.
Simultaneously, with reference to figure 4, multimachine air-conditioner of the present invention can have the multiple flow-control valve system that is provided to indoor set " A ".Concentrate the description flow control valve with reference to another preferred embodiment of the present invention that figure 4 is described.In order to carry out reference, the title of the parts identical with the first embodiment of the present invention described in Fig. 1 is identical.
With reference to figure 4, the flow control valve that being used in the off-premises station " A " controlled refrigerant flow comprises two triple valve 17a and 17b, and two magnetic valve 17c and 17d.
The first triple valve 17a is provided on the intersection point of the discharge pipe 3 and first bypass pipe 11, and the second triple valve 17b is provided on the intersection point of suction line 5 and the 3rd bypass pipe.
The 7th magnetic valve 17c was provided on the conduit 4, and between the tie point of the tie point of first bypass pipe 11 and the 3rd bypass pipe 13, the 8th magnetic valve 17d is provided on second bypass pipe 12.
Control to two triple valve 17a and 17b and two magnetic valve 17c and 17d is as described below.
The first triple valve 17a is so controlled, make cold-producing medium in all rooms of refrigeration and freeze most of rooms and heat and flow to off-premises station heat exchanger 2 under the situation in minority room, heating all rooms and heating most of rooms and heat under the situation in minority room and flow to first bypass pipe 11.The second triple valve 17d is so controlled, make cold-producing medium in all rooms of refrigeration and freeze most of rooms and heat and flow to compressor 1 under the situation in minority room, heating all rooms and heating most of rooms and heat under the situation in minority room and flow to the 3rd bypass pipe 13.The 7th magnetic valve 17c is so controlled, and makes the 7th magnetic valve 17c in all rooms of refrigeration and freeze most of rooms and heat and open under the situation in minority room, is heating all rooms and is heating most of rooms and heat under the situation in minority room and close.The 8th magnetic valve 17d is so controlled, and makes the 8th magnetic valve 17d in all rooms of refrigeration and freeze most of rooms and heat and close under the situation in minority room, is heating all rooms and is heating most of rooms and heat under the situation in minority room and open.
Simultaneously, multimachine air-conditioner of the present invention also comprises control device, is used to control the rotary speed of outdoor machine fan 2a.
Control device comprises temperature sensor 16 and microcomputer (not shown), the rotary speed that is used for control break outdoor machine fan 2a is so that the gas-liquid mixed of the cold-producing medium of process off-premises station heat exchanger 2 inflow gas-liquid separators 40 is than being applicable to different operating conditions.
With reference to figure 1, temperature sensor 16 was provided on the conduit 4, was used for measuring the temperature of the cold-producing medium that is flowed by mistake conduit 4 after 2 discharges of off-premises station heat exchanger.
Refrigerant temperature and predetermined refrigerant temperature that microcomputer is measured temperature sensor 16 compare, to detect the gas-liquid mixed ratio of the cold-producing medium that flows in the conduit 4, this microcomputer is the rotary speed of control break outdoor machine fan 2a also so that the gas-liquid mixed that detects than with the different operating condition under required predetermined gas-liquid mixed than identical.
Aforementioned multimachine air-conditioner is operated, make when the gaseous refrigerant of discharging by compressor 1 according to different operating conditions and through first bypass pipe, 11 direct directed dispensers " B ", or after the gas-liquid separator 40 that flows in the distributor " B " through off-premises station heat exchanger 2, separate and the liquid refrigerant of discharging flows into compressor 1 afterwards through the indoor set electric expansion valve of indoor set and heat exchanger indoor unit and distributor " B " at gas-liquid separator 40, this indoor set cools off the room; Separate and the gaseous refrigerant of discharging gas-liquid separator 40 and the off-premises station electric expansion valve 15a in the off-premises station " A " and the off-premises station heat exchanger 2 in the heat exchanger indoor unit by indoor set and indoor set electric expansion valve, distributor " B " enters compressor 1 through second bypass pipe 12 afterwards at gas-liquid separator 40, this indoor set heats the room, will describe its detailed operating process according to different operating conditions below.For the ease of narration, in most of rooms refrigeration and under the situation that the minority room heats, suppose that two indoor set C1 and C2 freeze to the room, the 3rd indoor set C3 heats the room, and heat in most of rooms and under the situation of minority room refrigeration, two indoor set C1 and C2 heat the room, suppose that the 3rd indoor set C3 freezes to the room.
Fig. 2 A is the circuit diagram of mode of operation of the multimachine air-conditioner of Fig. 1 when all rooms all freeze, wherein, the operating process of cooling off all rooms has such circulation canal: wherein, whole cold-producing mediums of being discharged by compressor 1 flow into compressor 1 afterwards passing through off-premises station heat exchanger 2, distributor " B ", indoor set electric expansion valve 61, heat exchanger indoor unit 62 and distributor " B " in succession, and it is described in detail as follows described.
With reference to figure 2A, the gaseous refrigerant of being discharged by compressor 1 enters off-premises station heat exchanger 2 through discharge pipe 3.In this case, open in order to guide gaseous refrigerant to lead to off-premises station heat exchanger 2, the first magnetic valve 3a, the 4th magnetic valve 11a that is positioned on first bypass pipe 11 closes with the 5th magnetic valve 12a that is positioned on second bypass pipe 12.
The cold-producing medium that is directed in the off-premises station heat exchanger 2 carries out heat exchange with the extraneous air that the outdoor machine fan 2a that is controlled by control device is blown into, till sub-cooled becomes liquid state, when it flow through conduit 4, it flowed into gas-liquid separator 40 then through check valve 14.In this case, off-premises station heat exchanger 2 is as condenser, the off-premises station electric expansion valve Close All on the parallel conduits 13.
Be directed to the high pressure liquid refrigerant process liquid refrigerant conduit 23 in the gas-liquid separator 40 in the distributor, and be separated and be directed into liquid refrigerant arm 24.The liquid refrigerant that is directed to liquid refrigerant arm 24 enters indoor set " C " respectively after through the ON/OFF control valve on the liquid refrigerant arm 24.
The liquid refrigerant of introducing indoor set " C " expands at expansion valve 61 places, along with cold-producing medium carries out heat exchange in heat exchanger indoor unit 62 generating gasification and with space air and cool room is introduced into gaseous refrigerant arm 22 at last.In this case, heat exchanger indoor unit 62 is as gasifier.
The gaseous refrigerant of introducing gaseous refrigerant arm 22 enters return pipe 26 through loop arm 25.In this case, for gaseous refrigerant being directed to loop arm 25, the ON/OFF control valve on the gaseous refrigerant arm 22 is closed.The gaseous refrigerant of introducing return pipe 26 enters compressor 1 through suction line 5 and accumulator 19.In this case, the 6th magnetic valve 13a that is directed on accumulator 19, the three bypass pipes 13 for the cold-producing medium that will be incorporated into suction line 5 closes.
Fig. 2 B is the circuit diagram of the mode of operation of multimachine air-conditioner when all rooms all heat, wherein, the operating condition that heats all rooms has such circulation canal: wherein, whole cold-producing mediums of being discharged by compressor 1 flow into compressor 1 by second bypass pipe 12 after in succession through first bypass pipe 11, distributor " B ", heat exchanger indoor unit 62, indoor set electric expansion valve 61, distributor " B ", bypass pipe 13, off-premises station electric expansion valve 15a and off-premises station heat exchanger 2, it is described in detail as follows described.
With reference to figure 2B, because the first magnetic valve 3a closes, therefore the gaseous refrigerant of discharging from compressor 1 moves to crossing conduit 4 from discharge pipe 4 through first bypass pipe 11.In this case, the 4th magnetic valve 11a opens.
Hindered with the 3rd magnetic valve 4a that closes owing to lead to flowing of off-premises station heat exchanger 2, the gas-liquid separator 40 of gaseous refrigerant in distributor " B " of therefore introducing conduit 4 moves.
The gaseous refrigerant of introducing gas-liquid separator 40 enters gaseous refrigerant arm 22 through gaseous refrigerant conduit 21, and enters into the heat exchanger indoor unit 62 of indoor set " C " thus because the ON/OFF control valve on the loop arm 25 is closed.
Introduce the gaseous refrigerant of heat exchanger indoor unit 62 and blow into the air that comes by indoor machine fan and carry out heat exchange, emitting condensation heat, heat rooms, at this moment heat exchanger indoor unit 62 is as condenser.
At the magnetic valve 61 of liquid refrigerant through all opening of heat exchanger indoor unit 62 sub-cooled and condensation, and enter gas-liquid separator 40 in the off-premises station " B " through liquid refrigerant arm 24, liquid refrigerant conduit 23.
The liquid refrigerant of introducing gas-liquid separator 40 is discharged into distributor bypass pipe 27, and enters the interior suction line 5 of off-premises station " A " through return pipe 26.Certainly, in this case, in order to guide cold-producing medium, the 9th magnetic valve 32 is opened, and all the ON/OFF control valves 31 on each loop arm 25 are all closed, shown in Fig. 2 B.
The cold-producing medium of introducing suction line 5 enters the 3rd bypass pipe 13 through the second magnetic valve 5a, enters parallel conduits 15 through check valve 14, expands at off-premises station electric expansion valve 15a, and carries out heat exchange and gasification at off-premises station heat exchanger 2.In this case, off-premises station heat exchanger 2 is as gasifier.
Because the first magnetic valve 3a closes, therefore the liquid refrigerant in off-premises station heat exchanger 2 sub-cooled and condensation enters second bypass pipe 12 through discharge pipe 4, and enters compressor 1 through second bypass pipe 12, suction line 5 and accumulator 19.
Fig. 3 A is when most of rooms refrigeration and the circuit diagram of minority room mode of operation of multimachine air-conditioner shown in Figure 1 when heating, wherein, the operating process of cooling off most of rooms and heating the minority room has such circulation canal: wherein, whole cold-producing mediums of being discharged by compressor 1 enter off-premises station heat exchanger 2 and the interior gas-liquid separator 40 of distributor " B ", thus, the liquid refrigerant that separates in gas-liquid separator 40 is passing through indoor set electric expansion valve 61a and 61b in succession, the indoor set C1 of cool room and heat exchanger indoor unit 62a and the 62b among the C2, distributor " B ", enter into compressor 1 after the suction line 5, heat exchanger indoor unit 62c and electric expansion valve 61c in the gaseous refrigerant process indoor set C3 of heat rooms that gas-liquid separator 40 separates, combine with the liquid refrigerant in the distributor " B ", by electric expansion valve 61a and 61b, the heat exchanger indoor unit 62a and the 62b of cool room, distributor " B " and suction line 5, enter compressor 1 at last, it is described in detail as follows described.
With reference to figure 3A, when in order to guide gaseous refrigerant the first magnetic valve 3a is opened, when the 4th magnetic valve 11a on first bypass pipe 11 and the 5th magnetic valve 12a on second bypass pipe 12 close, the gaseous refrigerant of being discharged by compressor 1 enters off-premises station heat exchanger 2 through discharge pipe 3.
Simultaneously, the gaseous refrigerant that enters off-premises station heat exchanger 2 with blow into the extraneous air that comes by outdoor machine fan 2a and carry out heat exchange, be suitable for carrying out the most of rooms of cooling and heat the gas-liquid mixed ratio of the operation in minority room to have.Promptly, if make a large amount of extraneous airs blow to off-premises station heat exchanger 2 owing to outdoor machine fan 2a rotates at a high speed, then the flowing fluid ratio in the cold-producing medium uprises, if be blown into off-premises station heat exchanger 2 owing to outdoor machine fan 2a low speed rotation makes the small number of external air, then the ratio of the gas in the cold-producing medium increases.The present invention's suggestion is by the rotary speed of control device control outdoor machine fan 2a, the required best gas-liquid mixing ratio of operation that heats the minority room to obtain to be suitable for cooling off most of rooms.
The operation of outdoor machine fan that is used for controlling air-conditioner of the present invention is as described below with the method that obtains best gas-liquid mixing ratio.
The temperature of the cold-producing medium of the gas-liquid mixed of being discharged by off-premises station heat exchanger 2 is measured by the temperature sensor of crossing on the conduit 4 16.
Afterwards, the refrigerant temperature and the predetermined refrigerant temperature that record at temperature sensor 16 compare, to detect the gas-liquid mixed ratio of cold-producing medium.
Next, change the rotary speed of outdoor machine fan 2a, the gas-liquid mixed ratio and the predetermined operating condition of the feasible cold-producing medium that detects are promptly cooled off most of rooms and are heated the minority room, and required predetermined mix is than identical.
In case control device has changed the rotary speed of outdoor machine fan 2a by said method, multimachine air-conditioner of the present invention just can be optimized the gas-liquid mixed ratio of cold-producing medium under all conditions, thereby improves refrigerating/heating efficient.
When control device is controlled outdoor machine fan 2a by said method, the refrigerant mixed that the microcomputer of control device is set is than make the test value that experimentizes and be fixed up under the different loads condition, as be suitable for two refrigeration side indoor set C1 and C2 and test values that heat indoor set C3 that need gaseous refrigerant that need liquid refrigerant, or be suitable for heating the test value etc. of flow velocity that indoor set C3 enters the liquid refrigerant of two refrigeration side indoor set C1 and C2 through one.
The control of the outdoor machine fan 2a that so carries out is applicable to the operating condition in all rooms of cooling and the most of rooms of heating and the minority room that freezes.
Simultaneously, the cold-producing medium that is mixed into the two states of best gas-liquid mixing ratio at off-premises station heat exchanger 2 passed through conduit 4 and entered gas-liquid separator 3 in the distributor " B ".For guiding cold-producing medium like this, the off-premises station electric expansion valve 15a Close All on the parallel conduits 13, the 3rd magnetic valve 4a opens.
The cold-producing medium of two states that enters the high pressure of gas-liquid separator 40 is separated into liquid refrigerant and gaseous refrigerant, and wherein, liquid refrigerant enters liquid refrigerant conduit 23, and gaseous refrigerant enters gaseous refrigerant conduit 21.
The liquid refrigerant that enters liquid refrigerant conduit 23 separately enters the first liquid refrigerant arm 24a and the second liquid refrigerant arm 24b, expand during at liquid refrigerant by the first indoor set electric expansion valve 61a and the second indoor set electric expansion valve 61b, carry out heat exchange at cold-producing medium during through the first heat exchanger indoor unit 62a and the second heat exchanger indoor unit 62b, with cool room.
When cool room, enter return pipe 26 through the first gaseous refrigerant arm 22a and the second gaseous refrigerant arm 22b and the first loop arm 25a and the second loop arm 25b at the gaseous refrigerant of the first heat exchanger indoor unit 62a and second heat exchanger indoor unit 62b gasification.In this case, in order to guide gaseous refrigerant, the ON/OFF control valve on ON/OFF control valve 31a on the first gaseous refrigerant arm 22a and the second gaseous refrigerant arm 22b and the 3rd connecting branch 25c of 31b and the 3rd indoor set C3 is closed.The gaseous refrigerant that enters return pipe 26 enters compressor 1 through suction line 5 and accumulator 19.In this case, in order to guide cold-producing medium, the 6th magnetic valve 13a on the 3rd bypass pipe 13 closes.
Simultaneously, because ON/OFF control valve 31a and 31b on the first gaseous refrigerant arm 22a and the second gaseous refrigerant arm 22b close, therefore, separate and whole gaseous refrigerants of entering gaseous refrigerant conduit 21 enter the 3rd gaseous refrigerant arm 22c of indoor set C3 side at gas-liquid separator 40.
When the ON/OFF control valve on tertiary circuit arm 25c is closed, the gaseous refrigerant that enters the 3rd gaseous refrigerant arm 22c enters into the 3rd heat exchanger indoor unit 62c, and carry out heat exchange, the release heat to pass through the gaseous refrigerant condensation, thereby heat rooms, then, this cold-producing medium enters the 3rd liquid refrigerant arm 24c through the 3rd electric expansion valve 61c, and combines with liquid refrigerant in being flowing in liquid refrigerant conduit 23.In conjunction with after, cold-producing medium enters the indoor set C1 and the C2 of cool room, cools off each room, enters into compressor 1 then.
In this case, because the pressure differential of cold-producing medium, the liquid refrigerant that enters liquid refrigerant conduit 23 not only enters the 3rd indoor set C3 side, and enters the first indoor set C1 and the second indoor set C2, one side.That is, this is owing to be higher than the pressure of the cold-producing medium that flows to the first liquid refrigerant arm 24a and the second cold-producing medium arm 24b by the pressure of the cold-producing medium that obtains of the 3rd liquid refrigerant arm 24c.
Fig. 3 B heats and the circuit diagram of the mode of operation of minority room when refrigeration multimachine air-conditioner when most of rooms, wherein, the operating condition that heats most of rooms and cool off the minority room has such circulation canal: wherein, whole cold-producing mediums of being discharged by compressor 1 enter distributor " B " through first bypass pipe 11, thus, the indoor set C1 of process heat rooms and the heat exchanger indoor unit 62a among the C2 and 62b and indoor set electric expansion valve 61a and 61b enter distributor " B " once more, the indoor set electric expansion valve 61c of the indoor set C3 of the part process cool room of this cold-producing medium and heat exchanger indoor unit 62c and distributor " B " enter compressor 1, another part of this cold-producing medium is through gas-liquid separator 40, distributor bypass pipe 27, return pipe 26, suction line 5, the 3rd bypass pipe 13, off-premises station electric expansion valve 15a and off-premises station heat exchanger 2 also enter compressor 1 by second bypass pipe 12, and it is described in detail as follows described.
With reference to figure 3B, by the closed first magnetic valve 3a, the gaseous refrigerant of being discharged by compressor 1 enters first bypass pipe 11 through discharge pipe 3, and has entered into conduit 4.
Obstruction by the 3rd magnetic valve 4a, the gaseous refrigerant that entered conduit 4 has been directed into the gas-liquid separator 40 in the distributor " B ", enter the first heat exchanger indoor unit 62a and the second heat exchanger indoor unit 62b and in this condensation through the first gaseous refrigerant arm 22a and the second gaseous refrigerant arm 22b, and enter the first liquid refrigerant arm 24a and the second cold-producing medium arm 24b through the first indoor set electric expansion valve 61a and the second indoor set electric expansion valve 61b.In this case, the first indoor set electric expansion valve 61a and the second indoor set electric expansion valve 61b all open.
The liquid refrigerant that enters the first liquid refrigerant arm 24a and the second cold-producing medium arm 24b flows into liquid refrigerant connecting leg 23, and the part of liquid refrigerant is diverted to gas-liquid separator 40, and another part is diverted to the 3rd cold-producing medium arm 24c.
In this case, the shunting of liquid refrigerant and the part that is flowing in the gas-liquid separator 40 enter suction line 5 through the 3rd bypass pipe 13 and return pipe 26.The cold-producing medium that enters suction line 5 enters the 3rd bypass pipe 13 by the second magnetic valve 5a guiding of closing, and expand during by the off-premises station electric expansion valve 15a on the parallel conduits 15 at it because check valve 14 and the 3rd magnetic valve 4a have blocked liquid flow, enter compressor 1 through off-premises station heat exchanger 2, second bypass pipe 12 and suction line 5 then.
The shunting of liquid refrigerant and the another part that is flowing among the 3rd liquid refrigerant arm 24c also expand therein through the 3rd indoor set electric expansion valve 61c, carry out heat exchange, cool room in heat exchanger indoor unit 62c.The gaseous refrigerant that gasifies when the refrigerant cools room is through the 3rd gaseous refrigerant arm 22c and tertiary circuit arm 25c, combine with return pipe 26 through the 3rd gaseous refrigerant arm 22c and tertiary circuit arm 25c, and enter compressor 1 by suction line 5.
As mentioned above, no matter how connect caused operating condition by the uniqueness between off-premises station conduit and the bypass pipe, the present invention not only connects off-premises station " A " and distributor " B " by the two-way conduit simply, and especially two conduits is defined as high-pressure section HP and low-pressure section LP, wherein, high-pressure refrigerant is flowing among the high-pressure section HP, and low pressure refrigerant is flowing among the low-pressure section LP.How the unattended operation condition all keeps the high-pressure section of high pressure to be defined as the part between first bypass pipe 11 and gas-liquid separator 40 on the conduit 4 especially, shown in Fig. 1-4, how the unattended operation condition all keeps the low-pressure section of low pressure to be defined as the part between distributor " B " and the 3rd bypass pipe 13 of being positioned on the suction line 5 especially.
The above-mentioned narration of the operation of multimachine air-conditioner of the present invention is based on a preferred embodiment of the present invention, and wherein, flow control valve comprises six magnetic valve 3a, 5a, 4a, 11a, 12a and 13a, as shown in Figure 1.Yet as shown in Figure 4, the present invention can also be embodied as another embodiment, and wherein, flow control valve comprises two triple valve 17a and 17b, and two magnetic valve 17c and 17d.The operation of control flow valve when the another embodiment of the present invention shown in the application drawing 4 is below only described because except the system of flow control valve, shown in the another embodiment of the present invention shown in Fig. 4 and Fig. 1 preferably
Embodiment is identical.
Heat in the operating process in minority room with the most of rooms of refrigeration in all rooms of refrigeration, so control the first triple valve 17a, make the whole cold-producing mediums that obtain by compressor 1 enter off-premises station heat exchanger 2 through discharge pipes 3.The second three-way pipe 17b is so controlled, and makes the whole cold-producing mediums that flow to suction line 5 from distributor " B " enter compressor 1.In this process, the 7th magnetic valve 17c opens, and the 8th magnetic valve 17d closes.
In the operating process that heats minority room that freezes, all rooms with heating most of rooms, so control the first triple valve 17a, make the whole cold-producing mediums that obtain by compressor 1 enter first bypass pipe 11.The second triple valve 17b is so controlled, and makes the whole cold-producing mediums that flow to suction line 5 from distributor " B " enter the 3rd bypass pipe 13.In this process, the 7th magnetic valve 17c closes, and the 8th magnetic valve 17d opens.
Simultaneously, above-mentioned another embodiment of the present invention has the element that quantity reduces, thereby is easy to make.
The present invention with said system and operation in the above described manner has following advantage.
At first, the achieve a solution optimum efficiency of each room environment of multimachine air-conditioner that can the application of the invention.Promptly, when heating selectively or freezing, not only can realize the refrigerating operation that heats operation and all rooms in all rooms, and can realize the heating of most of rooms and the operation of minority room refrigeration and most of room refrigeration and operation that the minority room heats, thereby allow each room environment is handled.
Second, how and especially the unattended operation condition is defined as the two conduits between distributor and the off-premises station only the feasible change that can reduce the cold-producing medium specific volume of high-pressure refrigerant high-pressure section that flows through and the low-pressure section of having only low pressure refrigerant to flow through, improves the efficient of air conditioning.
The 3rd, only there is two conduits to make that on-the-spot installation is simple between distributor and the off-premises station.
The 4th, cool off all rooms and cool off most of rooms and heat the cold-producing medium that enters gas-liquid separator in the operating process in minority room mixing ratio optimization and improvement air conditioning efficient.
The 5th, therefore the simple close/open valve because distributor provides a plurality of cheapnesss has reduced production cost.
Obviously, under the condition that does not deviate from essence of the present invention or scope, those skilled in the art is easy to the present invention is made various improvement and change.Therefore, among the improvement of the present invention that scope obtained of additional claim and equivalent thereof and change are also contained in the present invention.

Claims (21)

1, a kind of multimachine air-conditioner comprises:
Off-premises station, off-premises station comprises:
The accumulator, compressor and the off-premises station heat exchanger that are linked in sequence with the off-premises station conduit,
The off-premises station electric expansion valve parallel of the outlet side of off-premises station heat exchanger with the off-premises station conduit,
Bypass pipe is used for the cold-producing medium by compressor is diverted to the outside of off-premises station, the cold-producing medium that the cold-producing medium in the off-premises station outside is diverted to off-premises station electric expansion valve and will enters the compressor outlet side be diverted to compressor entrance side and
A plurality of refrigerant flow control valves on off-premises station conduit and the bypass pipe are used to control the flow of cold-producing medium;
Indoor set in each room, they each all include heat exchanger indoor unit and indoor set electric expansion valve; With
The distributor that comprises gas-liquid separator, be used for to be separated into gaseous refrigerant and liquid refrigerant by the cold-producing medium that off-premises station obtains, the guiding gaseous refrigerant enters the heat exchanger indoor unit of the indoor set that the room is heated, direct liquid refrigerant enters the indoor set electric expansion valve to the indoor set of room refrigeration, and the guiding cold-producing medium flows to off-premises station by indoor set, wherein, if to freezing respectively and heat in each room, the cold-producing medium that liquefies when the indoor set by the room is heated will be directed to the electric expansion valve to the indoor set of room refrigeration once more before guiding to off-premises station.
2, multimachine air-conditioner according to claim 1, also comprise control device, be used to control the rotary speed of outdoor machine fan, be suitable for different operating conditions than being adjusted to so that process off-premises station heat exchanger enters the gas-liquid mixed of the cold-producing medium of gas-liquid separator.
3, multimachine air-conditioner according to claim 1, wherein, control device comprises:
Be provided at the supravasal temperature sensor of off-premises station of off-premises station heat exchanger side, be used to measure the cold-producing medium that obtains by the off-premises station heat exchanger temperature and
Microcomputer, be used for refrigerant temperature and predetermined refrigerant temperature that comparison records at temperature sensor, with the ratio of the refrigerant mixed in the detected catheter, and the rotary speed of control outdoor machine fan, so that the required predetermined mix of the mixing ratio that detects and the operating condition of setting is than identical.
4, multimachine air-conditioner according to claim 1, wherein, the off-premises station conduit comprises:
Be connected the discharge pipe between the inlet of compressor outlet and off-premises station heat exchanger,
Be connected between the inlet of the outlet of off-premises station heat exchanger and gas-liquid separator the mistake conduit and
Be connected the suction line between the inlet of the outlet of distributor and compressor.
5, multimachine air-conditioner according to claim 4, wherein, bypass pipe comprises:
Be connected first bypass pipe between discharge pipe and the mistake conduit,
Be connected discharge pipe the part between first bypass pipe and the off-premises station heat exchanger and second bypass pipe between the suction line and
Be connected part and suction line three bypass pipe part second bypass pipe and export distributor between between of conduit between the off-premises station heat exchanger and first bypass pipe.
6, multimachine air-conditioner according to claim 4, wherein, the refrigerant flow control valve comprises:
The first ON/OFF magnetic valve between first bypass pipe and second bypass pipe on the discharge pipe,
The second ON/OFF magnetic valve between second bypass pipe and the 3rd bypass pipe on the suction line,
Supravasal the 3rd ON/OFF magnetic valve between first bypass pipe and the 3rd bypass pipe of overcurrent,
The 4th ON/OFF magnetic valve on first bypass pipe,
The 5th ON/OFF magnetic valve on second bypass pipe,
The 6th ON/OFF magnetic valve on the 3rd bypass pipe,
The supravasal check valve between the 3rd bypass pipe and off-premises station heat exchanger of overcurrent is used to prevent that cold-producing medium is from the 3rd bypass pipe flowing to the Way out of off-premises station heat exchanger.
7, multimachine air-conditioner according to claim 6, wherein, first, second and the 3rd ON/OFF magnetic valve are in all rooms of refrigeration and freeze most of rooms and heat and open in the operating process in minority room, are heating all rooms and are heating most of rooms and close in the operating process in the minority room that freezes.
8, multimachine air-conditioner according to claim 6, wherein, four, the 5th and the 6th ON/OFF magnetic valve is in all rooms of refrigeration and freeze most of rooms and heat and cut out in the operating process in minority room, heating all rooms and heating most of rooms and open in the operating process in the minority room that freezes.
9, multimachine air-conditioner according to claim 5, wherein, the refrigerant flow control valve comprises:
Be provided at first triple valve on the discharge pipe and the first bypass pipe intersection point,
Be provided at second triple valve on suction line and the 3rd bypass pipe intersection point,
Be provided at the seven ON/OFF magnetic valve of conduit on the part between first bypass pipe and the 3rd bypass pipe,
Be provided on second bypass pipe the 8th ON/OFF magnetic valve and
Be provided at the upper check valve between the 3rd bypass pipe and off-premises station heat exchanger of conduit, be used to prevent that cold-producing medium was from the 3rd bypass pipe flowing to the Way out of off-premises station heat exchanger.
10, multimachine air-conditioner according to claim 9, wherein, like this control first triple valve: cold-producing medium is heated in all rooms of refrigeration and the most of rooms of refrigeration in the operating process in minority room flow into the off-premises station heat exchanger, heating all rooms and heating most of rooms and flow into first bypass pipe in the operating process in the minority room that freezes.
11, multimachine air-conditioner according to claim 9, wherein, like this control second three-way pipe: cold-producing medium is heated in all rooms of refrigeration and the most of rooms of refrigeration in the operating process in minority room flow into compressor, heating all rooms and heating most of rooms and flow into the 3rd bypass pipe in the operating process in the minority room that freezes.
12, multimachine air-conditioner according to claim 9, wherein, the 7th ON/OFF magnetic valve heats in all rooms of refrigeration and the most of rooms of refrigeration and opens in the operating process in minority room, is heating all rooms and is heating most of rooms and close in the operating process in the minority room that freezes.
13, multimachine air-conditioner according to claim 9, wherein, the 8th ON/OFF magnetic valve heats in all rooms of refrigeration and the most of rooms of refrigeration and cuts out in the operating process in minority room, is heating all rooms and is heating most of rooms and open in the operating process in the minority room that freezes.
14, multimachine air-conditioner according to claim 5, wherein, off-premises station electric expansion valve is provided on the parallel conduits, and this parallel conduits was provided on the conduit, and was parallel with check valve.
15, multimachine air-conditioner according to claim 14, wherein, off-premises station electric expansion valve heats in all rooms of refrigeration and the most of rooms of refrigeration and cuts out in the operating process in minority room, is heating all rooms and is heating most of rooms and open in the operating process in the minority room that freezes.
16, multimachine air-conditioner according to claim 5, wherein, accumulator is provided to the part of suction line between second bypass pipe and compressor.
17, multimachine air-conditioner according to claim 5, wherein, distributor comprises:
Gas-liquid separator has the mistake conduit in the connected off-premises station heat exchanger,
Distributor pipes is used to guide gaseous state or liquid refrigerant in gas-liquid separator separates to flow to indoor pusher side, and guiding through the cold-producing medium of indoor set flow to once more off-premises station and
Valve portion is used for flowing at distributor pipes according to the operating condition control cold-producing medium of hope.
18, multimachine air-conditioner according to claim 17, wherein, distributor pipes comprises:
The gaseous refrigerant conduit is used for guiding the gaseous refrigerant that separates at gas-liquid separator,
A plurality of gaseous refrigerant arms, each is all come out by the gaseous refrigerant conduit branch, and is connected to the heat exchanger indoor unit of each indoor set,
The liquid refrigerant conduit is used to guide the liquid refrigerant in gas-liquid separator separates,
A plurality of liquid refrigerant arms, each is all come out by the liquid refrigerant conduit branch, and is connected to the indoor set electric expansion valve on each indoor set,
The loop arm, each is all come out by gaseous refrigerant arm branch,
Return pipe connects together described loop arm, and is connected to suction line; With
The distributor bypass pipe is connected between the bottom and return pipe of gas-liquid separator.
19, multimachine air-conditioner according to claim 17, wherein, valve portion comprises:
A plurality of be provided on gaseous refrigerant arm, liquid refrigerant arm and the loop arm and controlled ON/OFF control valve and
Be provided on the distributor bypass pipe and controlled the 9th ON/OFF magnetic valve.
20, multimachine air-conditioner according to claim 19, wherein, dispenser valve part is so controlled, and makes the ON/OFF control valve on the cold-producing medium connecting leg that is provided at the indoor pusher side that the room is heated and is provided at the ON/OFF closed electromagnetic valve on the gaseous refrigerant arm of the indoor pusher side of room refrigeration.
21, a kind of method of operating that is used to control outdoor machine fan in the multimachine air-conditioner comprises the steps:
The temperature of the gas-liquid mixed refrigerant that measurement is obtained by the off-premises station heat exchanger;
Refrigerant temperature and the pre-customized refrigerant temperature measured are compared, to detect the gaseous refrigerant mixing ratio of cold-producing medium; With
Change the rotary speed of outdoor machine fan so that the gas-liquid mixed that detects than with the required predetermined gas-liquid mixed of scheduled operation condition than identical.
CN 03108497 2002-08-22 2003-04-14 Multimachine air conditioner and operating method for controlling outdoor machine fan CN1239854C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR10-2002-0049751A KR100447203B1 (en) 2002-08-22 2002-08-22 Multi-type air conditioner for cooling/heating the same time and method for controlling the same
KR49751/2002 2002-08-22
KR49751/02 2002-08-22

Publications (2)

Publication Number Publication Date
CN1477345A true CN1477345A (en) 2004-02-25
CN1239854C CN1239854C (en) 2006-02-01

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CN100354578C (en) * 2004-10-02 2007-12-12 三星电子株式会社 Air conditioner and method of controlling the same
CN100432568C (en) * 2004-09-24 2008-11-12 乐金电子(天津)电器有限公司 Distributor for central air conditioner
CN100513944C (en) * 2005-02-24 2009-07-15 三菱电机株式会社 Air-conditioning plant
CN1987257B (en) * 2005-12-22 2010-05-05 乐金电子(天津)电器有限公司 Heating operation method for composite air conditioner
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CN101793439B (en) * 2010-02-23 2013-01-16 林贤华 Multi-element heat pump air-conditioning system with low temperature and heat recovery
CN102116515B (en) * 2009-12-31 2013-04-10 珠海格力电器股份有限公司 Intelligent control method of refrigerating and heating recovery mode of air conditioning unit
CN103277949A (en) * 2013-05-24 2013-09-04 四川长虹空调有限公司 Shunting control device and method, multi-online air conditioning system and air conditioner
CN103673206A (en) * 2012-09-19 2014-03-26 约克广州空调冷冻设备有限公司 Outdoor machine fan adjusting method for multi-split air conditioning system
CN104596147A (en) * 2015-01-26 2015-05-06 珠海格力电器股份有限公司 Multi-online system
CN105650811A (en) * 2016-01-04 2016-06-08 广东美的暖通设备有限公司 Method and device for controlling indoor unit of air conditioner
CN108775725A (en) * 2018-05-21 2018-11-09 广东美的暖通设备有限公司 The indoor unit of three control multi-connected machines and three control multi-connected machines
CN108895567A (en) * 2018-03-21 2018-11-27 青岛海信日立空调系统有限公司 Outdoor unit, multi-line system and control method, device, computer storage medium
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CN100339666C (en) * 2004-06-22 2007-09-26 游可方 Variable loaded heat pump system in multi machines
CN100432568C (en) * 2004-09-24 2008-11-12 乐金电子(天津)电器有限公司 Distributor for central air conditioner
CN100354578C (en) * 2004-10-02 2007-12-12 三星电子株式会社 Air conditioner and method of controlling the same
CN100513944C (en) * 2005-02-24 2009-07-15 三菱电机株式会社 Air-conditioning plant
CN1987257B (en) * 2005-12-22 2010-05-05 乐金电子(天津)电器有限公司 Heating operation method for composite air conditioner
CN101714847B (en) * 2009-12-18 2011-12-14 海信科龙电器股份有限公司 Method for controlling air conditioning outdoor motor
CN102116515B (en) * 2009-12-31 2013-04-10 珠海格力电器股份有限公司 Intelligent control method of refrigerating and heating recovery mode of air conditioning unit
CN101793440B (en) * 2010-02-23 2012-02-29 林贤华 Ultra-low temperature heat recovery multivariant heat pump air conditioning system
CN101793439B (en) * 2010-02-23 2013-01-16 林贤华 Multi-element heat pump air-conditioning system with low temperature and heat recovery
CN102192583A (en) * 2010-03-12 2011-09-21 珠海格力电器股份有限公司 Air-conditioner and method for switching working mode of air-conditioner
CN102192583B (en) * 2010-03-12 2013-04-03 珠海格力电器股份有限公司 Air-conditioner and method for switching working mode of air-conditioner
CN102519112B (en) * 2011-11-30 2014-04-16 四川长虹电器股份有限公司 Fan control method for modular water chilling unit
CN102519112A (en) * 2011-11-30 2012-06-27 四川长虹电器股份有限公司 Fan control method for modular water chilling unit
CN103673206A (en) * 2012-09-19 2014-03-26 约克广州空调冷冻设备有限公司 Outdoor machine fan adjusting method for multi-split air conditioning system
CN103673206B (en) * 2012-09-19 2017-02-08 约克广州空调冷冻设备有限公司 Outdoor machine fan adjusting method for multi-split air conditioning system
CN103277949A (en) * 2013-05-24 2013-09-04 四川长虹空调有限公司 Shunting control device and method, multi-online air conditioning system and air conditioner
CN104596147A (en) * 2015-01-26 2015-05-06 珠海格力电器股份有限公司 Multi-online system
CN105650811A (en) * 2016-01-04 2016-06-08 广东美的暖通设备有限公司 Method and device for controlling indoor unit of air conditioner
CN105650811B (en) * 2016-01-04 2019-01-08 广东美的暖通设备有限公司 The method and apparatus for controlling air conditioner indoor unit
CN110140015A (en) * 2016-12-21 2019-08-16 三星电子株式会社 Air-conditioning equipment, the central control equipment of air-conditioning equipment, the remote control equipment of air-conditioning equipment, the indoor equipment of air-conditioning equipment and their control method
US10900674B2 (en) 2016-12-21 2021-01-26 Samsung Electronics Co., Ltd. Air conditioning apparatus, central control apparatus of the air conditioning apparatus, remote control apparatus of the air conditioning apparatus, indoor apparatus of the air conditioning apparatus and method of controlling thereof
CN108895567A (en) * 2018-03-21 2018-11-27 青岛海信日立空调系统有限公司 Outdoor unit, multi-line system and control method, device, computer storage medium
CN108775725A (en) * 2018-05-21 2018-11-09 广东美的暖通设备有限公司 The indoor unit of three control multi-connected machines and three control multi-connected machines
CN108775725B (en) * 2018-05-21 2020-12-15 广东美的暖通设备有限公司 Indoor unit of three-pipe multi-split air conditioner and three-pipe multi-split air conditioner

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JP2004085177A (en) 2004-03-18
KR100447203B1 (en) 2004-09-04
EP1391660A1 (en) 2004-02-25
DE60325145D1 (en) 2009-01-22
KR20040017602A (en) 2004-02-27
CN1239854C (en) 2006-02-01
EP1391660B1 (en) 2008-12-10

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