CN104566637B - The control method of multiple on-line system and its indoor set and outdoor unit - Google Patents

The control method of multiple on-line system and its indoor set and outdoor unit Download PDF

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Publication number
CN104566637B
CN104566637B CN201310522371.1A CN201310522371A CN104566637B CN 104566637 B CN104566637 B CN 104566637B CN 201310522371 A CN201310522371 A CN 201310522371A CN 104566637 B CN104566637 B CN 104566637B
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China
Prior art keywords
indoor
outdoor unit
refrigerant
control valve
throttle
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CN201310522371.1A
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CN104566637A (en
Inventor
李华勇
张光鹏
许永锋
梁伯启
马进
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Guangdong Midea HVAC Equipment Co Ltd
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Guangdong Midea HVAC Equipment Co Ltd
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Priority to CN201310522371.1A priority Critical patent/CN104566637B/en
Publication of CN104566637A publication Critical patent/CN104566637A/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
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30Arrangement or mounting of heat-exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32Responding to malfunctions or emergencies
    • F24F11/36Responding to malfunctions or emergencies to leakage of heat-exchange fluid

Abstract

The invention discloses a kind of multiple on-line system and its control method of indoor set and outdoor unit, the multiple on-line system includes at least one indoor set and at least one outdoor unit, and it is closed circuit that the indoor set with the outdoor unit is connected to form circulation.Each indoor set includes respectively:First Heat Exchanger;First throttle valve, the first throttle valve are located at one end of the First Heat Exchanger and are connected with the outdoor unit;First control valve, first control valve are located at the other end of the First Heat Exchanger and are connected with the outdoor unit;With the first refrigerant leak detector, the first refrigerant leak detector is located in the indoor set to detect the concentration of the indoor set internal leakage refrigerant, when the refrigerant in the indoor set leaks, the first throttle valve of the indoor set is closed, and the refrigerant of leakage is entered in the outdoor unit to reclaim refrigerant by the first control valve of the indoor set.Multiple on-line system according to embodiments of the present invention efficiently, refrigerant that is reliable, can detecting and reclaim leakage.

Description

The control method of multiple on-line system and its indoor set and outdoor unit
Technical field
The present invention relates to air-conditioning technical field, more particularly, to a kind of multiple on-line system and its indoor set and outdoor unit Control method.
Background technology
From《Montreal Protocol》Since signing, various countries expand the research work of R22 refrigerants replacement one after another.It is main at present The alterntive refrigerant wanted is R410A, R410A refrigerants ODP(Consume ozone latent energy value)Although for 0, GWP(Chamber effect potential value) It is higher.With attention of the international community to greenhouse effects, it is necessary to which it is the smaller refrigerants of zero, GWP to find ODP.Meet this requirement Refrigerant have R32, R290 etc., but these refrigerants are respectively provided with combustibility, and multi-connected machine refrigerant sufficient quantity is bigger, particularly commercialization Multi-connected machine, such as there is flammable refrigerant to be applied in multi-online air-conditioning system these, maximum danger is exactly:Such as occur cold Matchmaker leaks, it is possible to causes fire or blast.
In order to overcome these dangerous, coolant leakage such as occurs, it is necessary to reclaim refrigerant, reduces coolant leakage amount, reduces and occurs The possibility of fire.For one-to-one air-conditioning, the method that some producers use is:Set indoors on machine and outdoor unit connecting pipe The control valve member of pipeline break-make is put, the refrigerant leak detector of the detection refrigerant concentration of machine installation indoors, as refrigerant leak detector detects Coolant leakage, then the refrigerant recovering of indoor set to outdoor unit.The multi-gang air-conditioner unit in market, all without detection coolant leakage Device, refrigerant occur leakage unit will not also reclaim refrigerant automatically.
Correlation technique is primarily present following 2 points of deficiencies:
Firstth, above one-to-one air-conditioning technical pertains only to indoor set leakage recovery refrigerant, is not involved with outdoor unit leakage Recovery system refrigerant.Interior is possibly mounted at for multiple on-line system, particularly water source multiple on-line system, outdoor unit, it is such as outdoor Coolant leakage occurs for machine, it is also possible to causes fire or blast.
Secondth, the indoor set quantity of multiple on-line system connection is relatively more, and a such as indoor set leaks, according in the market For the method for some producer's one-to-one air-conditionings, it is necessary to cut off a whole set of air-conditioning system, this can influence the use of other room air conditioners.
The content of the invention
It is contemplated that at least solves one of above-mentioned technical problem to a certain extent.
Therefore, it is an object of the present invention to propose one kind with safe to use, efficiency high and can detect and reclaim The multiple on-line system of refrigerant.
It is another object of the present invention to propose a kind of control method of the indoor set of above-mentioned multiple on-line system.
Another object of the present invention is to propose a kind of control method of the outdoor unit of above-mentioned multiple on-line system.
Multiple on-line system according to embodiments of the present invention includes at least one indoor set and at least one outdoor unit, the room It is closed circuit that interior machine and the outdoor unit are connected to form circulation.
Wherein, each indoor set includes respectively:First Heat Exchanger;First throttle valve, the first throttle valve are located at One end of the First Heat Exchanger and it is connected with the outdoor unit;First control valve, first control valve are located at described first The other end of heat exchanger and it is connected with the outdoor unit;And the first refrigerant leak detector, the first refrigerant leak detector are located at institute State in indoor set to detect the concentration of the indoor set internal leakage refrigerant, should when the refrigerant in the indoor set leaks The first throttle valve of indoor set is closed, and the refrigerant of leakage enters the room by first control valve of the indoor set To reclaim refrigerant in outer machine.
Multiple on-line system according to embodiments of the present invention, by installing first throttle valve and the first control in machine indoors Valve so that when the refrigerant in indoor set leaks, first throttle valve is closed, and the refrigerant of leakage is entered by the first control valve Into outdoor unit, refrigerant is reclaimed, avoid the fire caused by coolant leakage or blast, improve security, ensure that The person and property safety of user, and the refrigerant reclaimed can be continuing with, and improved the utilization rate of refrigerant, saved energy Source.Meanwhile when indoor set contains more, first throttle valve and the first control valve in the indoor set of coolant leakage can close Close, and other indoor sets or outdoor unit can then run well and it is unaffected.
In addition, multiple on-line system according to embodiments of the present invention can also have technical characteristic additional as follows:
According to one embodiment of present invention, the first refrigerant leak detector in any one of indoor set detects In the indoor set during coolant leakage, the outdoor unit runs refrigeration mode to discharge the refrigerant in the indoor set.
According to one embodiment of present invention, each outdoor unit includes respectively:Second heat exchanger;Second throttle, The second throttle is located at one end of second heat exchanger and is connected with the first throttle valve of the indoor set;Kind of refrigeration cycle Part, the kind of refrigeration cycle part is located in the outdoor unit and one end of the kind of refrigeration cycle part and second heat exchanger The other end be connected;Second control valve, second control valve be located on the other end of the kind of refrigeration cycle part and with it is described First control valve of indoor set is connected;And the second refrigerant leak detector, the second refrigerant leak detector are located in the outdoor unit And detect the concentration of the leakage refrigerant in the outdoor unit.
According to one embodiment of present invention, the second refrigerant leak detector in any one of outdoor unit detects In the outdoor unit during coolant leakage, the indoor set runs heating mode to discharge the refrigerant in the outdoor unit.
According to one embodiment of present invention, the first refrigerant leak detector is set adjacent to the First Heat Exchanger, described Second refrigerant leak detector is set adjacent to second heat exchanger.
According to one embodiment of present invention, the outdoor unit also includes:Low-pressure sensor, the low pressure pass Sensor is located in the outdoor unit and detects the low pressure of the outdoor unit.
According to one embodiment of present invention, alarm, the alarm are respectively equipped with the indoor set and outdoor unit It is connected with the first refrigerant leak detector and the second refrigerant leak detector and in the indoor set and outdoor unit internal leakage refrigerant Concentration sends alarm when exceeding predetermined value.
According to one embodiment of present invention, the refrigerant in the indoor set and outdoor unit is flammable refrigerant.
The control method of the indoor set of the multiple on-line system of embodiment according to a second aspect of the present invention, comprises the following steps:
S1:Whether detect in the indoor set has coolant leakage.
S2:When any one in the indoor set detects coolant leakage, the indoor set shows failure code and sent Alarm, close the indoor set the first throttle valve and other do not occur coolant leakage indoor set the first throttle Valve and the first control valve, the outdoor unit run refrigeration mode to discharge the interior from first control valve of the indoor set Refrigerant in machine.
S3:When the low pressure in the outdoor unit reaches predetermined value, first control valve is controlled to disconnect, the interior Machine and the shutdown of all outdoor units, the indoor set shows failure code and sends alarm, and the indoor set operation sequence is locked, to receiving To instruction do not give instruction.
S4:Other are not detected by the indoor set of coolant leakage and outdoor unit recovers initial operation mode.
Specifically, in the step S2:
When the original state of the multiple on-line system is standby or shutdown mode, the indoor set shows failure code simultaneously Alarm is sent, the first throttle valve of the indoor set of coolant leakage does not occur for other and the first control valve is closed, the institute of the indoor set First throttle valve closing is stated, the indoor set and outdoor unit operation refrigeration mode are with from first control valve of the indoor set Discharge the refrigerant in the indoor set.
When the original state of the multiple on-line system is refrigeration mode, the indoor set shows the concurrent responding of failure code Report, the first throttle valve of the indoor set of coolant leakage does not occur for other and the first control valve is closed and in off-mode, the room The first throttle valve of interior machine is closed, and the indoor set and outdoor unit operation refrigeration mode are with from described the of the indoor set One control valve discharges the refrigerant in the indoor set.
When the original state of the multiple on-line system is heating mode, all indoor sets and outdoor unit are adjusted to shutdown shape State, the indoor set show that failure code simultaneously sends alarm, and the first throttle valve and the of the indoor set of coolant leakage does not occur for other One control valve is closed, and the first throttle valve of the indoor set is closed, the indoor set and outdoor unit operation refrigeration mode with The refrigerant in the indoor set is discharged from first control valve of the indoor set.
The control method of the outdoor unit of the multiple on-line system of embodiment comprises the following steps according to a third aspect of the present invention:
S5:Whether detect in the outdoor unit has coolant leakage.
S6:When any one in the outdoor unit detects coolant leakage, the outdoor unit shows failure code and sent Alarm, close the outdoor unit the second throttle and other do not occur coolant leakage outdoor unit it is described second throttling Valve and the second control valve, the indoor set run heating mode to discharge the outdoor from second control valve of the outdoor unit Refrigerant in machine.
S7:When the low pressure in the outdoor unit reaches predetermined value, second control valve is controlled to disconnect, the outdoor Machine and the shutdown of all indoor sets, the outdoor unit shows failure code and sends alarm, and the outdoor unit operation sequence is locked, to receiving To instruction do not give instruction.
S8:Other are not detected by the outdoor unit of coolant leakage and indoor set recovers initial operation mode.
Further, in the step S6:
When the original state of the multiple on-line system is standby or shutdown mode, the outdoor unit shows failure code simultaneously Alarm is sent, the second throttle of the outdoor unit of coolant leakage does not occur for other and the second control valve is closed, the institute of the outdoor unit Second throttle closing is stated, the outdoor unit and indoor set operation heating mode are with from second control valve of the outdoor unit Discharge the refrigerant in the outdoor unit.
When the original state of the multiple on-line system is refrigeration mode, the outdoor unit shows the concurrent responding of failure code Report, all indoor sets and outdoor unit are adjusted to stopped status, other do not occur the outdoor unit of coolant leakage second throttle and Second control valve is closed, and the second throttle of the outdoor unit is closed, the outdoor unit and indoor set operation Heating mode is to discharge the refrigerant in the outdoor unit from second control valve of the outdoor unit.
When the original state of the multiple on-line system is heating mode, the outdoor unit shows the concurrent responding of failure code Report, other outdoor units that coolant leakage does not occur adjust the second throttling of the outdoor unit that coolant leakage to stopped status, does not occur Valve and the second control valve are closed, and the second throttle of the outdoor unit is closed, the outdoor unit and the indoor set Heating mode is run to discharge the refrigerant in the outdoor unit from second control valve of the outdoor unit.
According to one embodiment of present invention, when simultaneously coolant leakage occurs for the indoor set and outdoor unit, occur cold The outdoor unit of matchmaker's leakage is first adjusted to off-mode, and the second throttle and the second control valve of the outdoor unit, which are in, closes shape State, the indoor set leaked reclaim refrigerant according to step S1-S4, after treating that refrigerant recovering is completed in the indoor set, let out The outdoor unit of leakage reclaims refrigerant according to step S5-S8.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment Substantially and it is readily appreciated that, wherein:
Fig. 1 is the structural representation of multiple on-line system according to embodiments of the present invention;
Fig. 2 is the flow chart of the control method of the indoor set of multiple on-line system according to embodiments of the present invention;
Fig. 3 is the flow chart of the control method of the outdoor unit of multiple on-line system according to embodiments of the present invention.
Reference:
1-100(2-100、n-100):Indoor set;
1-101(2-101、n-101):First control valve;
1-102(2-102、n-102):Blower fan;
1-103(2-103、n-103):First refrigerant leak detector;
1-104(2-104、n-104):First Heat Exchanger;
1-105(2-105、n-105):First throttle valve;
1-200(n-200):Outdoor unit;
1-201(n-201):Second heat exchanger;
1-202(2-202、n-202):Blower fan;
1-203(n-203):Second refrigerant leak detector;
1-204(n-204):Second throttle;
1-205(n-205):Second control valve;
1-206(n-206):Four-way reversing valve;
1-207(n-207):Compressor;
1-208(n-208):Oil eliminator;
1-209(n-209):Gas-liquid separator;
1-210(n-210):Low-pressure sensor.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", The instruction such as " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " Orientation or position relationship are based on orientation shown in the drawings or position relationship, are for only for ease of the description present invention and simplification is retouched State, rather than instruction or imply signified device or element there must be specific orientation, with specific azimuth configuration and operation, Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are only used for describing purpose, without being understood that To indicate or implying relative importance.In the description of the invention, " multiple " are meant that two or more, unless otherwise It is clearly specific to limit.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc. Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected;It can be machine Tool connects or electrical connection;Can be joined directly together, can also be indirectly connected by intermediary, can be two members Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be Concrete meaning in bright.
The multiple on-line system of embodiment according to a first aspect of the present invention is described in detail with reference to accompanying drawing first below.
It should be noted that hypothesis below is done in the following description, and present invention is described so that this assumes as an example. As shown in Figure 1, it is assumed that:Indoor set and outdoor unit include n respectively, and n can be the natural number more than or equal to 1, n indoor set Label is followed successively by 1-100 to n-100, and the label of n outdoor unit is followed successively by 1-200 to n-200, and n indoor set n-100 and n is individual Outdoor unit n-200 connected by pipeline to be formed circulation it is closed circuit.If there is the situation for having coolant leakage in indoor set n-100, with Occur illustrating in case of coolant leakage in indoor set 1-100;If there are the feelings for having coolant leakage in outdoor unit n-200 Condition, then illustrated in case of there is coolant leakage in outdoor unit 1-200;If there is indoor set n-100 and outdoor unit N-200 has the situation of coolant leakage simultaneously, then occur using in indoor set 1-100 and outdoor unit 1-200 the situation of coolant leakage as Example illustrates.
It is understood that above-mentioned hypothesis is not to the present invention only to facilitate the present invention is described in detail Limitation, indoor set n-100 and outdoor unit n-200 number can be the same or different, can be with when there is coolant leakage It is that any one in indoor set n-100 and outdoor unit n-200 coolant leakage occurs.
Specifically, multiple on-line system according to embodiments of the present invention includes at least one indoor set n-100 and at least one It is closed circuit that outdoor unit n-200, indoor set n-100 and outdoor unit n-200 are connected to form circulation.
Wherein, each indoor set n-100 includes First Heat Exchanger n-104, first throttle valve n-105, the first control respectively Valve n-101 and the first refrigerant leak detector n-103.Specifically, first throttle valve n-105 is located at First Heat Exchanger n-104's One end and it is connected with outdoor unit n-200, the first control valve n-101 is located at the First Heat Exchanger n-104 other end and and outdoor unit N-200 is connected, and the first refrigerant leak detector n-103 is located in indoor set n-100 and detects the dense of indoor set n-100 internal leakage refrigerants Degree, when the refrigerant in indoor set n-100 leaks, indoor set n-100 first throttle valve n-105 is closed, leakage Refrigerant is entered in outdoor unit n-200 to reclaim refrigerant by indoor set n-100 the first control valve n-101.
Thus, multiple on-line system according to embodiments of the present invention, by installing first throttle valve n- in machine n-100 indoors The 105 and first control valve n-101 so that when the refrigerant in indoor set 1-100 leaks, first throttle valve 1-105 is closed, The refrigerant of leakage is entered in outdoor unit n-200 by the first control valve 1-101, the refrigerant of leakage is reclaimed.
According to one embodiment of present invention, the first refrigerant leak detector n-103 detections in any one indoor set n-100 In to indoor set n-101 during coolant leakage, outdoor unit n-200 runs refrigeration mode to discharge the refrigerant in indoor set n-103.
Specifically, when leakage occurs for the refrigerant in any one indoor set n-100 or as any one indoor set n-100 In refrigerant content when reaching finite concentration, the first refrigerant leak detector n-103 can detect the refrigerant of leakage and make corresponding Reaction.And in the related art, if leakage occurs for an indoor set, it is necessary to cut off a whole set of multiple on-line system, so that influence To the use of other room air conditioners.
And multiple on-line system according to embodiments of the present invention, when coolant leakage occurs in indoor set 1-100, multi-connected machine system System control outdoor unit n-200 operation refrigeration modes, the indoor set 1-100 for leaking refrigerant can be cold in indoor set 1-100 Matchmaker is recovered in outdoor unit n-200.After the refrigerant discharged in indoor set 1-100 is recovered, multiple on-line system can be controlled Make indoor set 1-100 operation sequence it is locked enter to make indoor set 1-100 be stopped, other indoor sets not leaked N-100 and outdoor unit n-200 then recover normal operating conditions.
Thus, multiple on-line system according to embodiments of the present invention, it is first cold by being set in each indoor set n-100 Matchmaker leak detector n-103, when wherein there is coolant leakage in any one indoor set n-100, multiple on-line system can detect Arrive, and by controlling outdoor unit n-200 to run refrigeration mode so that the refrigerant in indoor set n-100 is discharged into recovery, without Coolant leakage problem can be excluded by cutting off a whole set of multiple on-line system, avoid the use to other room air conditioners, be not used only more For convenience, and security also greatly improves.
Correspondingly, according to one embodiment of present invention, each outdoor unit n-200 respectively include the second heat exchanger n-201, Second throttle n-204, kind of refrigeration cycle part, the second control valve n-205 and the second refrigerant leak detector n-203.Specifically, Second throttle n-204 is located at the second heat exchanger n-201 one end and is connected with indoor set n-100 first throttle valve n-105, Kind of refrigeration cycle part is located in outdoor unit n-200 and one end of kind of refrigeration cycle part and the second heat exchanger n-201 other end phase Even, the second control valve n-205 be located on the other end of kind of refrigeration cycle part and with indoor set n-100 the first control valve n-101 It is connected, the second refrigerant leak detector n-203 is located in outdoor unit n-200 and detects the concentration of outdoor unit n-200 internal leakage refrigerants.
I.e. by installing second throttle n-204 and the second control valve n-205 in outdoor unit n-200 so that work as outdoor When refrigerant in machine 1-200 leaks, second throttle 1-204 is closed, and the refrigerant of leakage is entered by the second control valve 1-205 Enter into indoor set n-100, refrigerant is reclaimed.
Further, according to one embodiment of present invention, the second refrigerant leak detector in any one outdoor unit n-200 When n-203 detects coolant leakage in outdoor unit n-200, indoor set n-100 runs refrigeration mode to discharge in outdoor unit n-200 Refrigerant.
Similarly, when leakage occurs for the refrigerant in any one outdoor unit n-200 or as any one outdoor unit n-200 In refrigerant content when reaching finite concentration, the second refrigerant leak detector n-203 can detect refrigerant and make corresponding reaction. In the related art, if leakage occurs for an outdoor unit, it is necessary to cut off a whole set of multiple on-line system, other rooms are equally influenced whether Between air-conditioning use.
And multiple on-line system according to embodiments of the present invention, when coolant leakage occurs in outdoor unit 1-200, multi-connected machine system System control indoor set n-100 operation heating modes, the outdoor unit 1-200 for leaking refrigerant can be cold in outdoor unit 1-200 Matchmaker is recovered in indoor set n-100.After the refrigerant discharged in outdoor unit 1-200 is recovered, multiple on-line system can be controlled It is locked and then outdoor unit 1-200 is stopped to make outdoor unit 1-200 operation sequence, other outdoors not leaked Machine n-200 and indoor set n-100 then recover normal operating conditions.
Thus, multiple on-line system according to embodiments of the present invention, it is second cold by being set in each outdoor unit n-200 Matchmaker leak detector n-203, when wherein there is coolant leakage in any one outdoor unit n-200, multiple on-line system can detect Arrive, and by controlling indoor set n-100 to run refrigeration mode so that the refrigerant in outdoor unit n-200 is discharged into recovery, without Coolant leakage problem can be excluded by cutting off a whole set of multiple on-line system, avoid the use to other room air conditioners, be not used only more For convenience, and security also greatly improves.
According to one embodiment of present invention, the refrigerant in indoor set n-100 and outdoor unit n-200 is flammable refrigerant. The flammable refrigerant of leakage easily triggers fire or blast, and the refrigerant recovering that will leak out can avoid the danger caused by coolant leakage Evil, improves security, ensure that the person and property safety of user, and the refrigerant reclaimed can be continuing with, and make refrigerant Utilization rate improve, saved the energy.Meanwhile when indoor set n-100 or outdoor unit n-200 contain more, let out in refrigerant The indoor set 1-100 of leakage or the choke valve in outdoor unit 1-200 and control valve can close, and other indoor sets n-100 or outdoor Machine n-200 can then run well and unaffected.
Specifically, the kind of refrigeration cycle part in outdoor unit n-200 include compressor n-207, gas-liquid separator n-209, Oil eliminator n-208 and four-way reversing valve n-206.First control valve n-101 and the second control valve n-205 can be magnetic valve, It can also be electric expansion valve.For the person of ordinary skill of the art, these structures are all apparent and can managed Solution, it will not be repeated here.
According to one embodiment of present invention, the first refrigerant leak detector n-103 is set adjacent to First Heat Exchanger n-104, the Two refrigerant leak detector n-203 are set adjacent to the second heat exchanger n-201.Thus, the first refrigerant leak detector n-103 and the inspection of the second refrigerant Leakage instrument n-203 can more accurately detect in indoor set n-100 or outdoor unit n-200 whether there is coolant leakage.Additionally, it is contemplated that To the concrete structure of multi-connected machine, this set also make it that the first refrigerant leak detector n-103 and the second refrigerant leak detector n-203 are neighbouring Electric-controlled box or air outlet.
Further, according to one embodiment of present invention, outdoor unit also includes low-pressure sensor n-210, low pressure Pressure sensor n-210 is located in outdoor unit n-200 and detects outdoor unit n-200 low pressures.Thus, low-pressure sensor N-210 can detect the low pressure in outdoor unit n-200 at any time, and by setting value outdoor unit n-200 recovery can be made suitable The refrigerant of amount, outdoor unit n-200 is avoided to be recovered to air and cause danger.
In order to which user can be reminded to carry out protective treatment in time when coolant leakage occurs in multiple on-line system, according to the present invention One embodiment, be respectively equipped with alarm, alarm and the first refrigerant leak detector on indoor set n-100 and outdoor unit n-200 N-103 and the second refrigerant leak detector n-203 is connected and the concentration of machine n-100 and outdoor unit n-200 internal leakage refrigerants indoors Alarm is sent during beyond predetermined value.Thus, it is possible to by setting predetermined value, when in indoor set n-100 or outdoor unit n-200 it is cold When matchmaker's leakage content reaches predetermined value, alarm can just occur for alarm, so as to remind user to carry out related repair, avoid Further cause danger.
The control of the indoor set of the multiple on-line system of embodiment according to a second aspect of the present invention is specifically described with reference to Fig. 2 Method.
Specifically, the control method of the indoor set of multiple on-line system according to embodiments of the present invention comprises the following steps:
S1:Whether there is coolant leakage in detection indoor set n-100.
S2:When any one in indoor set n-100 detects coolant leakage, indoor set 1-100 shows failure code And send alarm, close indoor set 1-100 first throttle valve 1-105 and other the indoor set n- of coolant leakage does not occur 100 first throttle valve n-105 and the first control valve n-101, outdoor unit n-200 operation refrigeration mode are with from indoor set 1- Refrigerant in 100 the first control valve 1-101 discharge indoor sets 1-100.
S3:When the low pressure in outdoor unit n-200 reaches predetermined value, the first control valve 1-101 of control disconnects, the room Interior machine 1-100 and all outdoor unit n-200 shutdown, indoor set 1-100 show failure code and send alarm, indoor set 1- 100 operation sequences are locked, and the instruction received is not given instruction.
S4:Other indoor set n-100 and outdoor unit n-200 for being not detected by coolant leakage recover initial operation mode.
Specifically, when equipment, which detects, contains coolant leakage in indoor set 1-100, the alarm in indoor set 1-100 Device sends alarm, while the indoor set n- of coolant leakage does not occur with other for indoor set 1-100 first throttle valve 1-105 First throttle valve n-105 and the first control valve n-101 in 100 are closed, and the second throttle n-204 in outdoor unit n-200 Opening is then in the second control valve n-205.Thus, indoor set 1-100 is connected with first throttle valve 1-105 one end not Connected again with other indoor sets n-100 and outdoor unit n-200, and indoor set 1-100 is connected with the first control valve 1-101 one end Then connected with other indoor sets n-100 and outdoor unit n-200.When outdoor unit n-200 runs refrigeration mode, indoor set 1-100 In refrigerant can just be exited into by the first control valve 1-101 in outdoor unit n-200.
When the low-pressure sensor n-210 in outdoor unit n-200 is detected when the low pressure in outdoor unit n-200 reaches During to predetermined value, the first control valve 1-101 close, indoor set 1-100 no longer with other indoor sets n-100 and outdoor unit n-200 Connection, and indoor set 1-100 and all outdoor unit n-200 shut down, indoor set 1-100 shows the concurrent responding of failure code Report, and operation sequence is locked, it is indoor after not given instruction to the instruction received, it is necessary to wait maintenance personal to program unblock Machine 1-100 can just run well.Now, it is other be not detected by coolant leakage indoor set n-100 and outdoor unit n-200 it is then extensive Multiple initial mode of operation, the signal that can receive user's transmission carries out associative operation, and choke valve therein and control valve Automatically controlled according to the pattern of operation.
Because the leakage of refrigerant is random, therefore multiple on-line system all may hair in standby, shutdown, refrigeration or heating Raw coolant leakage.Therefore, different control flows is had in step s 2 for different situations, multiple on-line system.
Specifically, when the original state of multiple on-line system is standby or shutdown mode, indoor set 1-100 shows failure Code simultaneously sends alarm, and the indoor set n-100 of coolant leakage first throttle valve n-105 and the first control valve n- does not occur for other 101 are closed, and indoor set 1-100 first throttle valve 1-105 is closed, indoor set 1-100 and outdoor unit n-200 operation refrigeration modes To discharge refrigerant therein from indoor set 1-100 the first control valve 1-101.
Further, when the original state of multiple on-line system is refrigeration mode, indoor set 1-100 shows failure code simultaneously Alarm is sent, other first throttle valve n-105 and the first control valve n-101 that the indoor set n-100 of coolant leakage does not occur are closed Close and be in off-mode, indoor set 1-100 first throttle valve 1-105 is closed, indoor set 1-100 and outdoor unit n-200 fortune Row refrigeration mode is with from the refrigerant in indoor set 1-100 the first control valve 1-101 discharges indoor set 1-100.
Further, when the original state of multiple on-line system is heating mode, all indoor set n-100 and outdoor unit N-200 is adjusted to stopped status, and indoor set 1-100 shows failure code and sends alarm, and the room of coolant leakage does not occur for other Interior machine n-100 first throttle valve n-105 and the first control valve n-101 is closed, indoor set 1-100 first throttle valve 1-105 Close, indoor set 1-100 and outdoor unit n-200 run refrigeration mode to be discharged from indoor set 1-100 the first control valve 1-105 Refrigerant in indoor set 1-100.
The control method of multiple on-line system when the foregoing describing indoor set n-100 one of generation coolant leakage, can With understanding, when coolant leakage occurs for n-200 in outdoor unit, equally it can be detected and is reclaimed.With reference to Fig. 3 specifically describes the control method of the outdoor unit of the multiple on-line system of embodiment according to a third aspect of the present invention.
According to one embodiment of present invention, the control method of the outdoor unit of multiple on-line system comprises the following steps:
S5:Whether there is coolant leakage in detection outdoor unit n-200.
S6:When any one in outdoor unit n-200 detects coolant leakage, outdoor unit 1-200 shows failure code And send alarm, close outdoor unit 1-200 second throttle 1-204 and other the outdoor unit n- of coolant leakage does not occur 200 second throttle n-204 and the second control valve n-205, indoor set n-100 operation heating mode are with from outdoor unit 1- Refrigerant in 200 the second control valve 1-205 discharge outdoor units 1-200.
S7:When the low pressure in outdoor unit n-200 reaches predetermined value, the second control valve 1-205 of control disconnects, the room Outer machine 1-200 and all indoor set n-100 shutdown, outdoor unit 1-200 show failure code and send alarm, outdoor unit 1- 200 operation sequences are locked, and the instruction received is not given instruction.
S8:Other outdoor unit n-200 and indoor set n-100 for being not detected by coolant leakage recover initial operation mode.
Specifically, when equipment, which detects, contains coolant leakage in outdoor unit 1-200, the alarm in outdoor unit 1-200 Alarm is sent, while the outdoor unit n-200 of coolant leakage does not occur with other for outdoor unit 1-100 second throttle 1-204 In second throttle n-204 and the second control valve n-205 close, and first throttle valve n-105 in indoor set n-100 and the One control valve n-101 is then in opening.Thus, outdoor unit 1-200 be connected with second throttle 1-204 one end no longer with Other outdoor units n-200 connects with indoor set n-100, and outdoor unit 1-200 be connected with the second control valve 1-205 one end then with Other outdoor units n-200 connects with indoor set n-100.When indoor set n-100 runs heating mode, in outdoor unit 1-200 Refrigerant can be just exited into indoor set n-100 by the second control valve 1-205.
When the low-pressure sensor n-210 in outdoor unit n-200 detects outdoor unit n-200 mesolows pressure to predetermined During value, the second control valve 1-205 is closed, and outdoor unit 1-200 no longer connects with other outdoor units n-200 and indoor set n-100, and Outdoor unit 1-200 and all indoor set n-100 shut down, and outdoor unit 1-200 shows failure code and sends alarm, and operates Program is locked, and after not given instruction to the instruction received, it is necessary to wait maintenance personal to program unblock, outdoor unit 1-200 is It can run well.Now, other outdoor unit n-200 and indoor set n-100 for being not detected by coolant leakage then recover initial Mode of operation, the signal that can receive user's transmission carries out associative operation, and choke valve therein and control valve are also according to operation Pattern automatically control.
Similarly, coolant leakage may also occur at multiple on-line system under standby, shutdown, refrigeration or heating mode.Therefore, Alternatively, in the state of difference, multiple on-line system has different control flows in step s 2.
First, when the original state of multiple on-line system is standby or shutdown mode, outdoor unit 1-200 shows failure generation Code simultaneously sends alarm, and the outdoor unit n-200 of coolant leakage second throttle n-204 and the second control valve n- does not occur for other 205 are closed, and outdoor unit 1-200 second throttle n-204 is closed, outdoor unit 1-200 and indoor set n-100 operation heating modes To discharge the refrigerant in outdoor unit 1-200 from outdoor unit 1-200 the second control valve 1-205.
Further, when the original state of multiple on-line system is refrigeration mode, outdoor unit 1-200 shows failure code simultaneously Alarm is sent, all indoor set n-100 and outdoor unit n-200 are adjusted to stopped status, and the outdoor of coolant leakage does not occur for other Machine n-200 second throttle n-204 and the second control valve n-205 are closed, outdoor unit 1-200 second throttle 1-204 is closed, and outdoor unit 1-200 and indoor set n-100 operation heating modes are with from outdoor unit 1-200 the second control valve 1- Refrigerant in 205 discharge outdoor unit 1-200.
Further, when the original state of multiple on-line system is heating mode, outdoor unit 1-200 shows failure code And alarm is sent, other outdoor unit n-200 that coolant leakage does not occur adjust the outdoor that coolant leakage to stopped status, does not occur Machine n-200 second throttle n-204 and the second control valve n-205 are closed, outdoor unit n-200 second throttle N-204 is closed, and outdoor unit 1-200 and indoor set n-100 operation heating modes are with from outdoor unit 1-200 the second control valve 1- Refrigerant in 205 discharge outdoor unit 1-200.
Similarly, the leak position of refrigerant is also random, refrigerant can indoors machine n-100 or outdoor unit n-200 and Leaked simultaneously in both.Alternatively, according to one embodiment of present invention, when indoor set 1-100 and outdoor unit 2-200 are same During Shi Fasheng coolant leakages, the outdoor unit 1-200 that coolant leakage occurs first is adjusted to off-mode, and the of outdoor unit 1-200 Two choke valve 1-204 and the second control valve 1-205 are closed, and the indoor set 1-100 leaked is according to step S1-S4 Refrigerant is reclaimed, after treating that refrigerant recovering is completed in indoor set 1-100, the outdoor unit 1-200 leaked is according to step S5-S8 Reclaim refrigerant.Because removal process is similar, therefore no longer repeated.
Other compositions and control method of multiple on-line system according to embodiments of the present invention are for ordinary skill All it is known for personnel, is not detailed herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any One or more embodiments or example in combine in an appropriate manner.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is not departing from the principle and objective of the present invention In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.

Claims (10)

  1. A kind of 1. multiple on-line system, it is characterised in that including multiple indoor sets and multiple outdoor units, the indoor set and the room Outer machine be connected to form circulation it is closed circuit, wherein,
    Each indoor set includes respectively:
    First Heat Exchanger;
    First throttle valve, the first throttle valve are located at one end of the First Heat Exchanger and are connected with the outdoor unit;
    First control valve, first control valve are located at the other end of the First Heat Exchanger and are connected with the outdoor unit;With
    First refrigerant leak detector, the first refrigerant leak detector are located at cold to detect the indoor set internal leakage in the indoor set The concentration of matchmaker, when the first refrigerant leak detector in any one of indoor set detects coolant leakage in the indoor set When, the first throttle valve of the indoor set is closed, and the outdoor unit runs refrigeration mode to discharge the refrigerant in the indoor set;
    Each outdoor unit includes respectively:
    Second heat exchanger;
    Second throttle, the second throttle be located at one end of second heat exchanger and with the first throttle of the indoor set Valve is connected;
    Kind of refrigeration cycle part, the kind of refrigeration cycle part is located in the outdoor unit and one end of the kind of refrigeration cycle part and institute The other end for stating the second heat exchanger is connected;
    Second control valve, second control valve are located on the other end of the kind of refrigeration cycle part and with the of the indoor set One control valve is connected;And
    Second refrigerant leak detector, the second refrigerant leak detector is located in the outdoor unit and to detect the outdoor unit internal leakage cold The concentration of matchmaker, when the second refrigerant leak detector in any one of outdoor unit detects coolant leakage in the outdoor unit When, the indoor set runs heating mode to discharge the refrigerant in the outdoor unit.
  2. 2. multiple on-line system according to claim 1, it is characterised in that the first refrigerant leak detector is adjacent to described first Heat exchanger is set, and the second refrigerant leak detector is set adjacent to second heat exchanger.
  3. 3. multiple on-line system according to claim 1, it is characterised in that the outdoor unit also includes:Low pressure senses Device, the low-pressure sensor are located in the outdoor unit and detect the low pressure of the outdoor unit.
  4. 4. multiple on-line system according to claim 1, it is characterised in that be respectively equipped with report on the indoor set and outdoor unit Alert device, the alarm are connected with the first refrigerant leak detector and the second refrigerant leak detector and in the indoor set and outdoors The concentration of machine internal leakage refrigerant sends alarm when exceeding predetermined value.
  5. 5. according to the multiple on-line system any one of claim 1-4, it is characterised in that in the indoor set and outdoor unit Refrigerant be flammable refrigerant.
  6. 6. a kind of control method of the indoor set of multiple on-line system according to any one of claim 1-5, its feature exist In comprising the following steps:
    S1:Whether detect in the indoor set has coolant leakage;
    S2:When any one in the indoor set detects coolant leakage, the indoor set shows failure code and sends alarm, Close the indoor set the first throttle valve and other do not occur coolant leakage indoor set the first throttle valve and First control valve, the outdoor unit operation refrigeration mode is with from first control valve of the indoor set discharge indoor set Refrigerant;
    S3:When the low pressure value in the outdoor unit reaches predetermined value, first control valve is controlled to disconnect, the indoor set Shut down with all outdoor units, the indoor set shows failure code and sends alarm, and the indoor set operation sequence is locked, to receiving Instruction do not give instruction;
    S4:Other are not detected by the indoor set of coolant leakage and outdoor unit recovers initial operation mode.
  7. 7. the control method of the indoor set of multiple on-line system according to claim 6, it is characterised in that in the step S2 In:
    When the original state of the multiple on-line system is standby or shutdown mode, the indoor set shows failure code and sent Alarm, the first throttle valve of the indoor set of coolant leakage does not occur for other and first control valve is closed, the indoor set The first throttle valve close, the indoor set and the outdoor unit operation refrigeration mode with from the indoor set it is described first control Valve processed discharges the refrigerant in the indoor set;
    When the original state of the multiple on-line system is refrigeration mode, the indoor set shows failure code and sends alarm, its He do not occur the indoor set of coolant leakage the first throttle valve and first control valve be closed and in off-mode, should The first throttle valve of indoor set is closed, and the indoor set and the outdoor unit run refrigeration mode with from described in the indoor set First control valve discharges the refrigerant in the indoor set;
    When the original state of the multiple on-line system is heating mode, all indoor sets and outdoor unit are adjusted to stopped status, The indoor set shows failure code and sends alarm, and the first throttle valve of the indoor set of coolant leakage and institute do not occur for other The closing of the first control valve is stated, the first throttle valve of the indoor set is closed, the indoor set and outdoor unit operation refrigeration mould Formula is to discharge the refrigerant in the indoor set from first control valve of the indoor set.
  8. 8. a kind of control method of the outdoor unit of multiple on-line system according to any one of claim 1-5, its feature exist In comprising the following steps:
    S5:Whether detect in the outdoor unit has coolant leakage;
    S6:When any one in the outdoor unit detects coolant leakage, the outdoor unit shows failure code and sends alarm, Close the outdoor unit the second throttle and other do not occur coolant leakage outdoor unit the second throttle and Second control valve, the indoor set run heating mode to discharge the outdoor from second control valve of the outdoor unit Refrigerant in machine;
    S7:When the low pressure value in the outdoor unit reaches predetermined value, second control valve is controlled to disconnect, the outdoor unit Shut down with all indoor sets, the outdoor unit shows failure code and sends alarm, and the outdoor unit operation sequence is locked, to receiving Instruction do not give instruction;
    S8:Other are not detected by the outdoor unit of coolant leakage and indoor set recovers initial operation mode.
  9. 9. the control method of the outdoor unit of multiple on-line system according to claim 8, it is characterised in that in the step S6 In:
    When the original state of the multiple on-line system is standby or shutdown mode, the outdoor unit shows failure code and sent Alarm, the second throttle of the outdoor unit of coolant leakage does not occur for other and second control valve is closed, the outdoor unit The second throttle close, the outdoor unit and the indoor set operation heating mode with from the outdoor unit it is described second control Valve processed discharges the refrigerant in the outdoor unit;
    When the original state of the multiple on-line system is refrigeration mode, the outdoor unit shows failure code and sends alarm, institute There are indoor set and outdoor unit to adjust to stopped status, the second throttle of the outdoor unit of coolant leakage and institute do not occur for other State the second control valve to be closed, the second throttle of the outdoor unit is closed, the outdoor unit and indoor set fortune Row heating mode is to discharge the refrigerant in the outdoor unit from second control valve of the outdoor unit;
    When the original state of the multiple on-line system is heating mode, the indoor set shows failure code and sends alarm, its The outdoor unit that coolant leakage does not occur for he adjusts the second throttle of the outdoor unit that coolant leakage to stopped status, does not occur It is closed with second control valve, the second throttle of the outdoor unit is closed, the outdoor unit and the interior Machine runs heating mode to discharge the refrigerant in the outdoor unit from second control valve of the outdoor unit.
  10. 10. a kind of control method of the outdoor unit of multiple on-line system according to any one of claim 1-5, its feature exist In when simultaneously coolant leakage occurs for the indoor set and the outdoor unit, the outdoor unit that coolant leakage occurs first is adjusted to pass Machine state, the second throttle of the outdoor unit and second control valve are closed, the indoor set leaked Refrigerant is reclaimed according to following steps:
    S1:Whether detect in the indoor set has coolant leakage;
    S2:When any one in the indoor set detects coolant leakage, the indoor set shows failure code and sends alarm, Close the indoor set the first throttle valve and other do not occur coolant leakage indoor set the first throttle valve and First control valve, the outdoor unit operation refrigeration mode is with from first control valve of the indoor set discharge indoor set Refrigerant;
    S3:When the low pressure value in the outdoor unit reaches predetermined value, first control valve is controlled to disconnect, the indoor set Shut down with all outdoor units, the indoor set shows failure code and sends alarm, and the indoor set operation sequence is locked, to receiving Instruction do not give instruction;
    S4:Other are not detected by the indoor set of coolant leakage and outdoor unit recovers initial operation mode;
    After treating that refrigerant recovering is completed in the indoor set, the outdoor unit leaked reclaims refrigerant according to following steps:
    S5:Whether detect in the outdoor unit has coolant leakage;
    S6:When any one in the outdoor unit detects coolant leakage, the outdoor unit shows failure code and sends alarm, Close the outdoor unit the second throttle and other do not occur coolant leakage outdoor unit the second throttle and Second control valve, the indoor set run heating mode to discharge the outdoor from second control valve of the outdoor unit Refrigerant in machine;
    S7:When the low pressure value in the outdoor unit reaches predetermined value, second control valve is controlled to disconnect, the outdoor unit Shut down with all indoor sets, the outdoor unit shows failure code and sends alarm, and the outdoor unit operation sequence is locked, to receiving Instruction do not give instruction;
    S8:Other are not detected by the outdoor unit of coolant leakage and indoor set recovers initial operation mode.
CN201310522371.1A 2013-10-29 2013-10-29 The control method of multiple on-line system and its indoor set and outdoor unit Active CN104566637B (en)

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