CN100532979C - Separated room load calculating method and electromagnetic expansion valve control method of central air conditioner - Google Patents
Separated room load calculating method and electromagnetic expansion valve control method of central air conditioner Download PDFInfo
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- CN100532979C CN100532979C CNB2004100937612A CN200410093761A CN100532979C CN 100532979 C CN100532979 C CN 100532979C CN B2004100937612 A CNB2004100937612 A CN B2004100937612A CN 200410093761 A CN200410093761 A CN 200410093761A CN 100532979 C CN100532979 C CN 100532979C
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Abstract
The present invention relates to control method for central air conditioner, and is especially method of calculating the loads of the rooms via correcting the initial room loads, and controlling the expanding solenoid valves based on the calculation results to distribute refrigerant in different indoor units. The method of calculating the loads of the rooms includes the following stages: judging the powers of the indoor units; calculating the room loads through load correction based on the room temperature values, the room temperature differences between the set values and the room temperature values and the outdoor temperature value; and adding the room loads to calculate the total load.
Description
Technical field
The present invention relates to a kind of control method of central air-conditioning, relate to a kind of external condition of considering each chamber or rather, basic load to the initial drive chamber of air-conditioning is carried out revisal, calculate each the chamber load that conforms to actual environment, and according to result of calculation control electromagnetic expanding valve, in the ratio of each indoor set self load, distribute each room load calculating method of central air-conditioning of refrigerant and the invention of electromagnetic expansion valve control method aspect to each indoor set.
Background technology
Air-conditioning is arranged in the spaces such as room, room, office, business shop, and temperature, humidity, cleanliness factor and the air-flow of air are adjusted, and the device of suitable indoor environment is provided, and can be divided into integral air conditioner and separation type air-conditioning substantially.
Above-mentioned integral air conditioner and separation type air-conditioning have identical functions.Usually, integral air conditioner is arranged on the body of wall of punching or window.The separation type air-conditioning has indoor set and off-premises station.Indoor set is arranged on indoor, freezes, heats operation.Off-premises station is arranged on outdoor, dispels the heat, operation such as compression.Above-mentioned indoor set is connected by the refrigerant pipe with off-premises station.
Usually, corresponding to an off-premises station, an indoor set is set.The space is provided with air-conditioning in multi-chamber if desired, then needs to be provided with several off-premises stations, not only outward appearance is produced bad influence, and raises the cost, and also needs to be provided with the space of many off-premises stations, reduces the space service efficiency.
Therefore, at present very active to the research and development of central air-conditioning.So-called central air-conditioning refers to, and connects a kind of separation type air-conditioning of a plurality of indoor sets on an off-premises station.
Fig. 1 is an ordinary central air-conditioner refrigerant circuit structure figure.
Above-mentioned central air-conditioning has indoor unit 10 and outdoor unit 1.Indoor unit 10 is positioned at indoor, has several indoor heat converters 11a, 11b, and 11c freezes, heats operation.Outdoor unit 1 is arranged on outdoor.
Above-mentioned outdoor unit 1 has variable speed compressor 2, constant speed compressor 3, outdoor heat converter 5, cooling fan 6.3 pairs of refrigerants of variable speed compressor 2 and constant speed compressor compress.Outdoor heat converter 5 allows the refrigerant of compression dispel the heat.Cooling fan 6 is arranged on a side of above-mentioned outdoor heat converter 5, allows refrigerant accelerate heat radiation.
When carrying out refrigerating operaton, be as the criterion with the flow direction of refrigerant, the downstream side of above-mentioned outdoor heat converter 5 is provided with main electromagnetic expanding valve 12.The downstream side of above-mentioned main electromagnetic expanding valve 12 is provided with auxiliary selenoid expansion valve 13a, and 13b, 13c, above-mentioned auxiliary selenoid expansion valve 13a, 13b, 13c allow refrigerant flow into respective chambers heat exchanger 11a, and 11b before the 11c, further expands, reduces pressure.Above-mentioned indoor heat converter 11a, 11b, each outlet of 11c is provided with the 1st temperature sensor 15a, 15b, 15c, to above-mentioned indoor heat converter 11a, 11b, the refrigerant temperature that 11c discharges carries out perception.
Above-mentioned constant speed compressor 3 and variable speed compressor 2 have the compression horsepower that can tackle indoor unit 1 maximum refrigeration, heat load 50%, it is converging together mutually before refrigerant inflow outdoor heat exchanger 5 that each discharges side, during it confluxes, be provided with the 2nd temperature sensor 4 that carries out perception from the refrigerant temperature of each compressor 2,3 compression back discharges.
Below, the process of refrigerastion of above-mentioned central air-conditioning is described.
The gas coolant that is compressed into the HTHP attitude in compressor 2,3 flows into above-mentioned outdoor heat exchange and plays 5 under the effect of four-way valve (figure slightly).Above-mentioned refrigerant is condensed into the liquid refrigerants of HTHP in the process that flows through above-mentioned outdoor heat converter 5.After the liquid refrigerant of HTHP that flows out from above-mentioned outdoor heat converter 5 flows into main electromagnetic expanding valve 12, flow through auxiliary selenoid expansion valve 13a, 13b, 13c becomes the state of low-temp low-pressure, inflow indoor heat exchanger 11a, 11b, 11c.The refrigerant that flows into becomes gaseous coolant, by the suction side of four-way valve water conservancy diversion to compressor 2,3 by evaporation.
At this moment, flow through above-mentioned indoor heat converter 11a, 11b, the refrigerant of 11c absorbs heat from room air, evaporates.Along with carrying out kind of refrigeration cycle repeatedly, the temperature of conditioned space can descend.
In the above-mentioned central air-conditioning, each indoor heat converter 11a, 11b, 11c constitutes an independent refrigerant loop.That is, the 1st indoor heat converter 11a constitutes the 1st refrigerant loop with compressor 2,3 outdoor heat converters 5 and the 1st auxiliary selenoid expansion valve 13c.The 2nd indoor heat converter 11b constitutes the 2nd refrigerant loop with compressor 2,3 outdoor heat converters 5 and the 2nd auxiliary selenoid expansion valve 13b.The 3rd indoor heat converter 11c constitutes the 3rd refrigerant loop with compressor 2,3 outdoor heat converters 5 and the 3rd auxiliary selenoid expansion valve 13a.Form the optimal refrigerant loop when allowing operation of air conditioner, need carry out suitable distribution, allow suitable refrigerant flow into each indoor heat converter 11a, 11b, 11c the refrigerant that above-mentioned compressor 2,3 is discharged.
Fig. 2 calculates the method for each chamber load and is used for the coolant quantity that flows into each indoor set is adjusted when being the initial start of conventional central air-conditioning electromagnetic expansion valve control method flow chart.
When central air-conditioning carried out work, control part was got summation after the load of each chamber is calculated, and calculated the total load amount (S10 stage) of air-conditioning integral body.Next, corresponding with above-mentioned total load amount, the power of compressor is controlled, discharge the required whole refrigerants (S20 stage) of operation of air conditioner.At this moment, each the chamber load the when indoor set that is separately positioned on each chamber self power setting is the air-conditioning initial start, therefore above-mentioned total load amount is, the summation of each chamber load, that is, and the summation of above-mentioned each indoor set power.Such as, central air-conditioning has 3 indoor sets, and their power is respectively 7K, 9K, during 10K, its total load amount is 26K.
The refrigerant that above-mentioned compressor is discharged is assigned to the indoor set of each chamber with the suitable method of salary distribution.Below traditional refrigerant method of salary distribution is described.At first, after control part is judged the power of each indoor set,, calculate each indoor set general power (S30 stage) to the power addition of each indoor set.Next, according to above-mentioned general power, calculate the power ratio of each indoor set, such as, the power of each indoor set is respectively 7K, 9K, during 12K, the general power of above-mentioned indoor set is 28K, and the power ratio of each indoor set is, the indoor set of 7K is 7/28, and the indoor set of 9K is 9/28, and the indoor set of 12K was 12/28 (S40 stage).
After calculating the power ratio of indoor set, to the openness of the electromagnetic expanding valve that is connected with each indoor set, i.e. pulse (pulse) value is set.The pulse value of electromagnetic expanding valve is set to and the corresponding ratio of above-mentioned power ratio, promptly, with power ratio is that the electromagnetic expanding valve pulse ratio that 7/28 7K indoor set links to each other also is set to 7/28, with power ratio is that the electromagnetic expanding valve pulse ratio that 9/28 9K indoor set links to each other also is set to 9/28, is that the electromagnetic expanding valve pulse ratio that 12/28 12K indoor set links to each other also was set to for 12/28 (S50 stage) with power ratio.
Afterwards, according to the pulse ratio of above-mentioned electromagnetic expanding valve, the pulse value of each electromagnetic expanding valve is set back (S60 stage), the refrigerant that compressor is discharged by by each open electromagnetic expanding valve of above-mentioned pulse value, is assigned to indoor set (S70).When above-mentioned compressor is discharged with the corresponding refrigerant of 28k power, 7/28 refrigerant wherein flows into the above-mentioned electromagnetic expanding valve that links to each other with the 7k indoor set, 9/28 refrigerant flows into the above-mentioned electromagnetic expanding valve that links to each other with the 9k indoor set, and 12/28 refrigerant flows into the above-mentioned electromagnetic expanding valve that links to each other with the 12k indoor set.
In a word, the control method of the central air-conditioning electromagnetic expanding valve of conventional art, when starting in the early stage, the decision of the total load amount of air-conditioning is each indoor set power sum, and according to the power of indoor set and the ratio of general power, the electromagnetic expanding valve pulse value that is connected with the respective chambers machine is set, determined refrigerant sendout thus each indoor set.Promptly, when the power of indoor set is big, it is also big to be judged as its initial stage load, correspondingly set the electromagnetic expanding valve pulse value that is attached thereto, allow a large amount of refrigerants flow into above-mentioned indoor set, and the power of indoor set hour, it is also little to be judged as its initial stage load, correspondingly set the electromagnetic expanding valve pulse value that is attached thereto, allow a spot of refrigerant flow into above-mentioned indoor set.
But, the power of each indoor set decision is initial load, and according to correspondingly ratio, the conventional method of distributing coolant quantity, there are the following problems.
First, the decision key element of load is a lot, such as indoor temperature, the difference of outdoor temperature, design temperature and indoor temperature etc., but just consider the power of indoor set, it is set at initial load, and when starting compressor, the coolant quantity that flows in the indoor set might not be the coolant quantity of this indoor set actual needs.That is, indoor set actual demand amount is during greater than the indoor set capacity, and the coolant quantity that flows into indoor set can be less than the actual demand amount, and indoor set actual demand amount is during less than the indoor set capacity, and the coolant quantity that flows into indoor set can be greater than the actual demand amount.Thereby the very difficult compression horsepower of suitably controlling compressor causes wasting electric energy.
The second, do not consider the actual loading of each chamber, only according to indoor set power, the pulse value of decision electromagnetic expanding valve causes the refrigerant different with indoor set actual demand amount to flow into indoor set, excessively refrigeration or overload might occur.
This shows that above-mentioned existing air conditioning control method still has many defectives, and the assistant officer waits to be improved.
Because the defective that above-mentioned existing air conditioning control method exists, the design people is based on being engaged in this type of product design manufacturing for many years, amassing has abundant practical experience and professional knowledge, actively studied innovation, in the hope of founding a kind of each room load calculating method of improved central air-conditioning and electromagnetic expansion valve control method, can improve general existing on the market conventional air conditioning control method, make it have more competitiveness.Through constantly research, design, and, create the present invention who has practical value finally through repetition test and after improving.
Summary of the invention
Technical problem underlying to be solved by this invention is, overcome the defective that existing air conditioning control method exists, and a kind of method of new each chamber load calculation of central air-conditioning is provided, the various key elements that its consideration might be exerted an influence to load when starting air-conditioning are calculated each chamber load.
Another technical problem to be solved by this invention is, a kind of method of new central air-conditioning electromagnetic expanding valve control is provided, and makes its self load ratio according to each indoor set, and the pulse value of decision and electromagnetic expanding valve determines its degree of opening.
The present invention solves its technical problem underlying and realizes by the following technical solutions.Each room load calculating method of central air-conditioning according to the present invention proposes is characterized in that: comprise the stage that the power of each indoor set is judged; With above-mentioned indoor set power is basic load, carries out the load revisal relevant with indoor temperature, the load revisal relevant with the difference of design temperature and indoor temperature and the relevant load revisal with outdoor temperature, the stage that each chamber load is calculated; Above-mentioned each the chamber load of addition, the stage of calculating the total load amount.
The present invention solves its technical problem and can also adopt following technical measures further to realize.
Preceding described load correction method, respectively after established standards indoor temperature, standard difference, the standard outdoor temperature, if when the poor and outdoor temperature of indoor temperature, design temperature and indoor temperature difference overgauge indoor temperature, standard difference, standard outdoor temperature, then allow the revisal ratio greater than " 1 ", if the poor and outdoor temperature of indoor temperature, design temperature and indoor temperature is during respectively less than standard room temperature, standard difference, standard outdoor temperature, then allow the revisal ratio less than " 1 ", basic load is carried out revisal.
Before described revisal ratio greater than 1 o'clock, if the difference between the poor and outdoor temperature of above-mentioned indoor temperature, design temperature and indoor temperature and standard room temperature, standard difference, the standard outdoor temperature is big more, then the revisal ratio is big more; When above-mentioned revisal ratio less than 1 the time, if the difference between the poor and outdoor temperature of above-mentioned indoor temperature, design temperature and indoor temperature and standard room temperature, standard difference, the standard outdoor temperature is big more, then the revisal ratio is more little.
Central air-conditioning electromagnetic expansion valve control method of the present invention is characterized in that: comprise the stage that load is calculated to each indoor set self; According to above-mentioned each indoor set self load ratio, the stage that the electromagnetic expanding valve pulse ratio of regulating each indoor heat converter refrigerant influx is set.
Before self load of described indoor set be the product of indoor heat converter area and ventilation.
Before described before load is calculated to each indoor set self, carry out the stage that the power of each indoor set is judged earlier; With above-mentioned indoor set power is that basic load is carried out the load revisal relevant with indoor temperature, the load revisal relevant with the difference of design temperature and indoor temperature and the relevant load revisal with outdoor temperature, the stage that each chamber load is calculated; Above-mentioned each the chamber load of addition, the stage of calculating the total load amount.
In the present invention, after the actual loading of calculating air-conditioning, discharge coolant quantity correspondingly, and the amount that above-mentioned refrigerant is needed by each indoor set, according to the indoor set actual configuration etc., objectively distribute, not only power consumption can be reduced, best refrigerant loop can also be constituted.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, the present invention is owing to adopt technique scheme, at first, in each room load calculating method, during the air-conditioning initial start, be basic load, consider the outer external condition that operation of air conditioner is exerted an influence with indoor set rated power, basic load is carried out revisal, can obtain each chamber load more accurately.And the air-conditioning actual loading of the summation of each chamber load when promptly being the air-conditioning initial start.When adjusting the compression horsepower of compressor, the needed coolant quantity in each chamber can be discharged exactly, the waste of energy of compressor can be prevented according to above-mentioned actual loading.
Next, in the central air-conditioning electromagnetic expansion valve control method of the present invention,, promptly, the impulse ratio of electromagnetic expanding valve is adjusted, determined each indoor-unit cooling-medium sendout according to the product of indoor heat converter area and air quantity according to self load of each indoor set.Therefore can be according to the indoor set actual configuration etc., to the coolant quantity that each indoor set needs, the judgement of cutting off can allow each indoor set form the optimal refrigerant loop respectively.
Each room load calculating method of the present invention and electromagnetic expansion valve control method, after the actual loading of air-conditioning calculated, allow compressor discharge correspondingly coolant quantity, and with reference to actual configuration of each indoor set etc., to the refrigerant demand of each indoor set, objectively judge the decision allocation proportion, not only waste of energy can be prevented, the optimal refrigerant loop can also be constituted.
In sum, the present invention really belongs to innovation on the kenel of space, and has the multinomial effect of enhancement than existing product, and method is simple, is suitable for practicality, has the extensive value of industry.It is in limited field, technical development space, no matter structurally or bigger improvement all arranged on the function, and have large improvement technically, and produced handy and practical effect, and has the effect of enhancement really, thereby being suitable for practicality more, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction partly of technical solution of the present invention feature, for making the professional and technical personnel can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is an ordinary central air-conditioner refrigerant circuit structure figure.
Fig. 2 calculates the method for each chamber load and is used for the coolant quantity that flows into each indoor set is adjusted when being the initial start of conventional central air-conditioning electromagnetic expansion valve control method flow chart.
Fig. 3 is a central air-conditioning block diagram of the present invention.
Fig. 4 is a central air-conditioning general structure block diagram of the present invention.
Fig. 5 is a central air-conditioning refrigerant of the present invention loop block diagram.
Fig. 6 is computational methods and the electromagnetic expansion valve control method block diagram of the present invention to each chamber load.
Fig. 7 is that central air-conditioning of the present invention carries out the Calculation Method flow chart to each chamber load.
Fig. 8 is a central air-conditioning electromagnetic expansion valve control method flow chart of the present invention of the refrigerant that compressor is discharged suitably being distributed to each indoor set.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to its specific embodiment, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Critical piece symbol description * * * * * * in the * * * * * accompanying drawing
100,180: off-premises station 102,160: the 1 distributors
110: the 2 distributors 104,142: the 1 indoor sets
106,144: the 2 indoor sets 108,146: the 3 indoor sets
142a: the 1st indoor heat converter 144a: the 2nd indoor heat converter
146a: 162: the 1 electromagnetic expanding valves of the 3rd indoor heat converter
166: the 3 electromagnetic expanding valves of 164: the 2 electromagnetic expanding valves
170: the 2 branched pipes of 168: the 1 branched pipes
182: variable speed compressor 184: constant speed compressor
190: holding vessel 192: four-way valve
194: 200: the 1 indoor machine temperature sensors of outdoor heat converter
204: the 3 indoor machine temperature sensors of 202: the 2 indoor machine temperature sensors
206: outdoor temperature sensor P1: main pipe arrangement
P3, P3, P4, P5, P6, P7: the 1st, 2,3,4,5,6 pipe arrangements
See also Fig. 3, shown in Figure 4, the central air-conditioning that air-conditioning of the present invention utilizes 2 distributors that 6 chambers are controlled.Central air-conditioning of the present invention has off-premises station 100, the 1st and the 2nd distributor 102,110 that is connected with off-premises station 100, is arranged on each the 1st to the 6th indoor indoor set 104,106,108,112,114,116.Above-mentioned off-premises station 100 is connected by main pipe arrangement P1 with the 1st, the 2nd distributor 102,110.Above-mentioned the 1st distributor 102 and the 1st to 3 indoor set 104,106,108 be by the 1st, 2,3 pipe arrangement P2, P3, and P4 connects, and above-mentioned the 2nd distributor 110 and the 4th to 6 indoor set 112,114,116 be by the 4th, 5,6 pipe arrangement P5, and P6, P7 connects.
Here, above-mentioned pipe arrangement (P1 is to P7) formed by the structure that inflow pipe and effuser isolation are provided with respectively.Refrigerant by above-mentioned inflow pipe from the off-premises station side flow to indoor pusher side, by above-mentioned effuser from the indoor set side flow to outdoor pusher side.
Above-mentioned heat exchanger 100 inside, the outdoor controller 120 that is provided with variable speed compressor, constant speed compressor, holding vessel, four-way valve, outdoor heat converter, outdoor fan and controls above-mentioned parts.On the above-mentioned distributor 102,110, be provided with dispensing controller 122,130, be used to control the electromagnetic expanding valve that refrigerant is carried out puffing.On the above-mentioned indoor set (104 to 116), the indoor controller (124 to 136) that is provided with indoor heat converter, indoor fan etc. and controls above-mentioned parts.
The user is by pressing key, after the input air-conditioning work order (refrigeration), the indoor controller 124 to 136 of one or more selected indoor sets (104 to 116), the data such as power of collecting design temperature, current indoor temperature, setting air quantity, each indoor set pass to outdoor controller 120.Above-mentioned outdoor controller 120 further detects other data such as outdoor temperatures again, after calculating the required total load of selected indoor set operation, it is benchmark that above-mentioned data are passed to the dispensing controller 122,130 time with above-mentioned data, and compressor is driven.
The refrigerant of discharging during compressor operating, flow through outdoor heat converter after, by the inflow pipe of main pipe arrangement P1, flow into above-mentioned the 1st, the 2nd distributor 102,110.Flow into the refrigerant of above-mentioned the 1st, the 2nd distributor 102,110, be depressurized expansion when flowing through with electromagnetic expanding valve that each indoor heat converter is connected after, along the inflow pipe of above-mentioned the 1st to the 6th pipe arrangement (P2 is to P7), flow to each indoor set (104 to 116).
When the refrigerant that flows into above-mentioned each indoor set (104 to 116) flows through indoor heat converter, after carrying out heat exchange, effuser along above-mentioned the 1st to the 6th pipe arrangement (P2 is to P7) flows, after confluxing in above-mentioned the 1st to the 2nd distributor 102,110, by the effuser inflow off-premises station 100 of main pipe arrangement P1.
Central air-conditioning of the present invention connects an off-premises station and a plurality of indoor set by distributor.In the conventional art, if during by 6 indoor sets of off-premises station control, 6 inflow pipes and six effusers need be set, promptly total 12 pipe arrangements.Therefore, not only not attractive in appearance in appearance, and also its pipe arrangement setup fee is also very high.
The present invention is by adopting distributor, single pipe arrangement is set till from the off-premises station to the distributor, from above-mentioned distributor to off-premises station till, each pipe arrangement is set, not only can improve outward appearance, and can also solve the cost issues that causes by pipe arrangement quantity.
Fig. 5 is a central air-conditioning refrigerant of the present invention loop block diagram.As utilizing two distributors to control the central air-conditioning of Room 6, off-premises station the 100, the 1st distributor the 102, the 1st to the 3rd indoor set (104 to 108) only draws in this accompanying drawing.
In each chamber of indoor 140, be respectively equipped with the 1st, 2,3 indoor sets.1st, 2,3 indoor sets have the 1st, 2,3 indoor heat converter 142a, 144a, 146a and the 1st, 2,3 indoor fan 142b, 144b, 146b respectively.
Off-premises station 180 has variable speed compressor 182 and constant speed compressor 184.Variable speed compressor 182 and constant speed compressor 184 are discharged after refrigerant is compressed into high-temperature high-pressure state.On the discharge portion of above-mentioned each compressor, be respectively equipped with the 1st oil feeder 186 and the 2nd oil feeder 188.Conflux after the refrigerant that above-mentioned variable speed compressor 182 and constant speed compressor 184 are discharged flows through above-mentioned the 1st oil feeder 186 and the 2nd oil feeder 188 respectively, flow into four-way valve 192.
When above-mentioned four-way valve 192 is air-conditioning conversion operation mode, allow the flow path of refrigerant play the device of respective change.When air-conditioning freezed operation, refrigerant was pressed the solid arrow direction and is flowed into, flows out, and when heating operation, and refrigerant press that the dotted arrow direction flows into, outflow.The refrigerant that above-mentioned each compressor 182,184 is discharged, under the guide functions of above-mentioned four-way valve 192, flowed into chamber outer heat-exchanger 194 when air-conditioning freezes, and air-conditioning flows to the 1st distributor 160 when heating.
The inside of above-mentioned the 1st distributor 160 has the 1st branched pipe 168 and the 2nd branched pipe 170.
Above-mentioned the 1st branched pipe 168 be assigned in each indoor set, and above-mentioned the 2nd branched pipe 170 allows the refrigerant that the inflow pipe 198a by main pipe arrangement flows into the refrigerant of discharging from each indoor set be flowed to one (when heating) in contrast.
The inflow pipe 198a of main pipe arrangement P1 is the quilt inflow pipe 167 of inflow pipe the 165, the 3rd pipe arrangement P4 of inflow pipe the 163, the 2nd pipe arrangement P3 of one-tenth the 1st pipe arrangement P2 of branch in above-mentioned the 1st branched pipe 168.And the effuser 198b of main pipe arrangement P1 quilt effuser 147 of effuser the 145, the 3rd pipe arrangement P4 of effuser the 143, the 2nd pipe arrangement P3 of one-tenth the 1st pipe arrangement P2 of branch in above-mentioned the 2nd branched pipe 170.
On the inflow pipe 163,165,167 of above-mentioned the 1st, 2,3 pipe arrangements, be respectively equipped with the 1st, 2,3 electromagnetic expanding valves 162,164,166.Above-mentioned each electromagnetic expanding valve becomes the refrigerant puffing that flows into each indoor set the refrigerant of low-temp low-pressure.By the refrigerant of above-mentioned the 1st to the 3rd electromagnetic expanding valve (162 to 166) puffing, by inflow pipe (163 to 167) inflow the 1st to the 3rd indoor heat converter (142a is to 146a) of above-mentioned the 1st to the 3rd pipe arrangement.After carrying out heat exchange when flowing through above-mentioned the 1st to the 3rd indoor heat converter (142a is to 146a), refrigerant flows into above-mentioned the 2nd branched pipe 170 by the effuser (143 to 147) of above-mentioned the 1st to the 3rd pipe arrangement.
Above-mentioned the 2nd branched pipe 170 is connected with four-way valve 192.Flow out the refrigerant (solid arrow) under the guide functions of above-mentioned four-way valve 192 of above-mentioned the 2nd branched pipe 170, flow into holding vessel 190.Above-mentioned holding vessel 190 is connected with the inflow entrance of variable speed compressor machine 182 with constant speed compressor 184.Under the effect of above-mentioned holding vessel 190, flow through above-mentioned the 1st, 2,3 heat exchanger 142a, 144a, the liquid refrigerants that is not evaporated during 146a can not flow to above-mentioned each compressor 182,184.
Among Fig. 5, symbol 200,202,204 is respectively the 1st, 2,3 indoor machine temperature sensors, is used to detect the indoor temperature of each chamber, and 206 are temp, sensor of outdoor unit, is used to measure outdoor temperature.
Central air-conditioning of the present invention moves freely to connect (free joint) mode.So-called free connected mode is, the discharge portion of compressor is combined into a discharge portion, and the refrigerant that allows each compressor discharge flows into a certain a kind of mode that needs the refrigerant loop of refrigerant, rather than allows the refrigerant of a certain compressor only flow to the mode in some refrigerant loop.
Thereby the frequency and the operation method of compressor are regulated in load that can be on demand, can move with energy-saving mode, but also can substitute a large-scale compressor with two light duty compressors, the cost of reduction compressor.
Fig. 3 has adopted two distributors to the central air-conditioning among Fig. 5, and 6 each indoor set are controlled.But technological thought of the present invention is not subjected to the restriction of the number of number, indoor set of above-mentioned distributor and the kind of indoor set (such as, ceiling mounting type, basket formula etc. mutually),
Fig. 6 is computational methods and the electromagnetic expansion valve control method block diagram of the present invention to each chamber load.
After the user keys in the operation of air conditioner order, after setting the temperature and air quantity that needs, each indoor set passes data such as the air quantity of setting 210, indoor heat converter area 212, indoor temperature 214, design temperature 218 to controller 220, and off-premises station passes outdoor temperature 216 data to above-mentioned controller 220.
Next, each chamber load of 220 pairs of air-conditioning initial starts of above-mentioned controller formula advances to calculate.Specifically, after the basic load when above-mentioned controller 220 is set at initial start to the rated power of indoor set, according to the poor and outdoor temperature of indoor temperature, design temperature and indoor temperature, the above-mentioned basic load of revisal is calculated each chamber actual loading.The total load amount 222 of air-conditioning is the summation of above-mentioned each chamber actual loading.
Here, above-mentioned controller 220 allows compressor with the power operation corresponding to total load amount 222, and according to above-mentioned data computation pulse ratio 224.Above-mentioned pulse ratio 224 is that the ratio of indoor set self load that obtains after each indoor set air quantity 210 and indoor heat converter area 212 are multiplied each other determines.
Below, with reference to accompanying drawing 7,8, each room load calculating method of the present invention and electromagnetic valve control method are elaborated.
Fig. 7 carries out the Calculation Method flow chart for central air-conditioning of the present invention to each chamber load.
After the user started air-conditioning, the power of each chamber indoor set of 220 pairs of selections of controller was judged (S100 stage).When describing with Fig. 5, if the user selects the 1st, 2,3 indoor sets 142,144,146, during the input service order, controller is judged above-mentioned the 1st, 2,3 indoor set power respectively.The situation of the power with above-mentioned the 1st, 2,3 indoor sets identical (such as all being 10K) is an example below, describes.
In the conventional art, behind the power of above-mentioned each indoor set of judgement, the total load amount when calculating the air-conditioning initial start in the mode of each power of addition is (during conventional art, 30K).But among the present invention, the indoor temperature that detects with each indoor machine temperature sensor 200,202,204 is a benchmark, and the power of indoor set is carried out the 1st revisal, calculates the 1st revisal load (S110 stage).
Load during the air-conditioning initial start is, with the fastest time, and when the temperature of conditioned space is adjusted to the temperature that the user sets, required air-conditioning load.After air-conditioning brings into operation, rapidly the adjustment of conditioned space is arrived design temperature, just can satisfy user's demand apace.
In the conventional art, the load the when rated power of indoor set is set at above-mentioned initial start, the operation of beginning air-conditioning.Even but have the indoor set of equal-wattage, along with the different and outdoor temperature difference of difference of difference, design temperature and the indoor temperature of indoor initial temperature, its time that reaches design temperature is also different separately.
Therefore, among the present invention, during load when calculating the air-conditioning initial start, to the said external environment, be of the influence of the poor and outdoor temperature etc. of indoor temperature, design temperature and indoor temperature to load, take in,, also can allow them have different initial start loads according to the difference of environment even rated power is identical.
During such as refrigeration, suppose that the indoor temperature in above-mentioned the 1st indoor set space of living in is 23 ℃, and the indoor temperature in above-mentioned the 2nd, the 3rd indoor set space of living in is respectively 27 ℃, 30 ℃.In the conventional art, the load of above-mentioned three indoor sets all is judged as identical load, that is, after calculating with the power of 10K, the initial start of beginning air-conditioning.At this moment, the temperature of conditioned space is that 23 ℃ the 1st indoor set is 27 ℃ the 2nd indoor set than the temperature of conditioned space, quickly adjustment is become design temperature.And the 2nd indoor set becomes design temperature to adjustment quickly than the 3rd indoor set.This shows that initial indoor temperature is high more, and the load during the air-conditioning initial start is big more.
Among the present invention, certain indoor temperature, be set at standard room temperature such as 20 ℃ after, if indoor temperature is 20 ℃, then the 1st revisal ratio with " 1 " carries out revisal (that is basic load=the 1st revisal load) to above-mentioned basic load.If indoor temperature is higher than 20 ℃, then above-mentioned basic load is carried out revisal (that is basic load＜the 1st revisal load) with the 1st revisal load greater than " 1 ".If indoor temperature is lower than 20 ℃, then above-mentioned basic load is carried out revisal (that is basic load,〉the 1st revisal load) less than the 1st revisal load of " 1 ".
Thereby during the air-conditioning initial start, the temperature of conditioned space is high more, and its 1st revisal ratio is big more, and the 1st revisal load that basic load is carried out after the 1st revisal is big more.On the contrary.The temperature of conditioned space is more little, and its 1st revisal ratio is more little, and is more little to the 1st revisal load that basic load is carried out after the 1st revisal.
After obtaining the 1st revisal load, poor according to the indoor temperature of design temperature and conditioned space carries out the 2nd revisal to it, calculates the 2nd revisal load (S120).
The difference of design temperature and indoor temperature also is the bigger factor of load effect during to the air-conditioning initial start.Among the present invention, difference is set for standard difference for 3 ℃.If difference is 3 ℃, then the 2nd revisal ratio with " 1 " carries out revisal (that is the 1st revisal load ,=the 2nd revisal load) to above-mentioned the 1st revisal load.If difference greater than 3 ℃, is then carried out revisal (that is the 1st revisal load,＜the 2nd revisal load) with the 2nd revisal ratio greater than " 1 " to above-mentioned the 1st revisal load.If difference is less than 3 ℃, then revisal (that is the 1st revisal load,〉the 2nd revisal load) is carried out in above-mentioned the 1st revisal load less than the 2nd revisal ratio of " 1 ".
That is, during the air-conditioning initial start, the difference of design temperature and indoor temperature is big more, and its 2nd revisal ratio is big more, and is big more to the 2nd revisal load of basic load being carried out after the 2nd revisal.On the contrary.The difference of design temperature and indoor temperature is more little, and its 2nd revisal ratio is more little, and basic load is carried out the 2nd revisal load after the 2nd revisal more less than the 1st revisal load.
After obtaining above-mentioned the 2nd revisal load,, the 3rd revisal carried out in the 2nd revisal load, calculated the 3rd revisal load (S130) according to outdoor temperature.
When air-conditioning freezed, indoor heat converter carried out the heat exchange operation, and the temperature of conditioned space is reduced to design temperature.If outdoor temperature is than higher, then because of outdoor air to indoor radiant heat, make air-conditioning not too obvious to indoor thermoregulatory effect.On the contrary, when outdoor temperature was lower than indoor temperature, room air can be to outdoor heat radiation, thereby can be reduced to design temperature quickly.Under the previous situation, consider that outdoor temperature improves the phenomenon of interior space load, suitably regulate the operation of air-conditioning, then under situation, consider that outdoor temperature reduces the phenomenon of interior space load, suitably regulates the operation of air-conditioning.
Among the present invention,, carry out following the 3rd revisal to load according to above-mentioned principle.Among the present invention, certain outdoor temperature, such as 36 ℃ be set at the mark standard room temperature after, if outdoor temperature is 36 ℃, then the 3rd revisal ratio with " 1 " carries out revisal (that is the 2nd revisal load ,=each chamber load) to above-mentioned the 2nd revisal load.If outdoor temperature is higher than 36 ℃, then revisal (that is the 2nd revisal load,＜each chamber load) is carried out in above-mentioned the 2nd revisal load with the 3rd revisal load greater than " 1 ".If outdoor temperature is lower than 36 ℃, then revisal (that is the 2nd revisal load,〉each chamber load) is carried out in above-mentioned the 2nd revisal load less than the 3rd revisal load of " 1 ".
During the air-conditioning initial start, outdoor temperature is high more, and its 3rd revisal ratio is big more, and each chamber load that basic load is carried out after the 3rd revisal is big more.On the contrary.Outdoor temperature is more little, and its 3rd revisal ratio is more little, to basic load being carried out the 3rd the outdoor load after the revisal more less than the 2nd revisal load.
Next, get the summation of above-mentioned each chamber load after, calculate total load amount (S140), controller is regulated compressor, allow compressor with the corresponding compression horsepower operation of above-mentioned total load amount.
The computational methods of each chamber load of the present invention are considered the external condition that the operation to air-conditioning exerts an influence, and revisal is carried out in each the chamber load during to the air-conditioning initial start, can obtain each chamber load more accurately.
And, the air-conditioning actual loading when the total load amount that above-mentioned each chamber load is carried out drawing after the summation is the air-conditioning initial start.Therefore, when regulating compressor, can allow the coolant quantity of discharge more accurate, prevent waste of electric energy according to it.
Among Fig. 7, when basic load is carried out revisal, only consider the poor and outdoor temperature of indoor temperature, design temperature and indoor temperature.But basic fundamental thought of the present invention is not subjected to the restriction of foregoing.It is also conceivable that the key element that other exert an influence to operation of air conditioner, revisal is carried out in above-mentioned load, calculate each chamber actual loading.
In addition, the order with the revisal of the revisal-outdoor temperature of the difference of the revisal-design temperature of indoor temperature and indoor temperature is carried out above-mentioned load revisal operation among Fig. 7.But above-mentioned revisal order can change by the concrete structure of system.That is, change the revisal order or once revisal is carried out in load, also can obtain identical invention effect according to all revisal ratios.
In addition, in the above-mentioned explanation, be that example is illustrated with the refrigeration operation.But when heating, can calculate each chamber load by the identical revisal operation of principle equally.
Fig. 8 is a central air-conditioning electromagnetic expansion valve control method flow chart of the present invention of the refrigerant that compressor is discharged suitably being distributed to each indoor set.
By each stage of Fig. 7, calculate the total load amount after, compressor is controlled, allow it with the operation of correspondingly power, discharge refrigerant.The refrigerant of discharging is assigned to each indoor set (such as, the 1st, the 2nd, the 3rd indoor set 142,144,146 of Fig. 5), flows.
Flow into the refrigerant of above-mentioned the 1st, the 2nd, the 3rd indoor set 142,144,146, its influx is regulated by the 1st, the 2nd, the 3rd electromagnetic expanding valve 162,164,166 respectively.And the openness of above-mentioned the 1st, the 2nd, the 3rd electromagnetic expanding valve 162,164,166 is determined by pulse value.At this moment, the allocation proportion that refrigerant is assigned to each chamber is the most important key element that constitutes optimal refrigerant circulation.
In the conventional art, by the power proportions of each indoor set, the allocation proportion of decision refrigerant, to the few relatively refrigerant of small-power indoor set supply, and to the many relatively refrigerants of high-power indoor set supply.But in this distribution method, do not consider to distribute refrigerant under the situation of each indoor set actual negative carrying capacity, cause carrying excessive refrigerant,, cause the problem of undue refrigeration or overload to the very few refrigerant of other indoor sets supplies to some indoor set.
Among the present invention, irrelevant with the rated power of each indoor set, self load according to each indoor set determines the refrigerant allocation proportion.So-called indoor set self load refers to, and such as irrelevant with external conditions such as indoor temperature, design temperature, outdoor temperatures, with relevant load such as indoor set self structure, is the product that the indoor heat converter area is established the air quantity of user's setting.
Even the power of each indoor set is identical, the air quantity that its inner indoor heat converter area that is provided with or user select is not simultaneously, load also can be different, the big relatively indoor set of area of indoor heat converter when to adopt power be each indoor set of 10K, the less indoor set of himself duty factor indoor heat converter area is big.And the air quantity that the user selects relatively the indoor set of " by force " have bigger self load than the indoor set of relative " weak ".
After air-conditioning brings into operation, above-mentioned controller is got summation to the load of each chamber, after calculating the total load amount, when regulating the compression horsepower of compressor 182,184, calculate self load (S200 stage) of the 1st, the 2nd, the 3rd indoor set 142,144,146 corresponding to above-mentioned total load amount.The indoor set power of above-mentioned the 1st, the 2nd, the 3rd indoor set is respectively 7K, 9K, during 12K, self load of above-mentioned the 1st indoor set is the product that the area A of the 1st indoor heat converter 142a multiply by air quantity B, be A*B, and self load of above-mentioned the 2nd indoor set is that the area C of the 2nd indoor heat converter 144a multiply by the product of air quantity D, i.e. C*D.Self load of above-mentioned the 3rd indoor set is that the area E of the 3rd indoor heat converter 146a multiply by the product of air quantity F, i.e. E*F.
Afterwards, after the whole additions of self load to each indoor set, calculate total indoor set load.Calculate the ratio of each indoor set self load then to overall indoor set load.Self load (A*B) such as the 1st indoor set is " 8 ", self load (C*D) of the 2nd indoor set is " 9 ", when self load (E*F) of the 3rd indoor set is " 10 ", above-mentioned overall indoor set load is 27, and the duty factor of the 1st, the 2nd, the 3rd indoor set is respectively, with 8,9,10 divided by result's (S210 stage) of above-mentioned 27.
Next, according to the ratio of above-mentioned indoor set self load, the impulse ratio of the electromagnetic expanding valve that is attached thereto of decision is determined the degree of opening of electromagnetic expanding valve.The pulse value of above-mentioned electromagnetic expanding valve is relevant with the impulse ratio of electromagnetic expanding valve, and this impulse ratio is by the decision of the ratio of self load of above-mentioned each indoor set.That is, if the ratio of indoor set self load is big, the electromagnetic expanding valve impulse ratio that then is attached thereto is also big, makes its openness also big.If the ratio of indoor set self load is little, the electromagnetic expanding valve impulse ratio that then is attached thereto is also little, allows its openness also little (S220 stage).
In the aforesaid example, the ratio of indoor set self load is 8/27 the 1st indoor set, and the 1st electromagnetic expanding valve pulse ratio that is attached thereto is and 8/27 corresponding magnitude proportion.And the 2nd, the 3rd indoor set, the 2nd, the 3rd electromagnetic expanding valve pulse ratio that is attached thereto is respectively and 9/27,10/27 corresponding magnitude proportion.
Based on above-mentioned impulse ratio, determine the pulse value (S230 stage) of each expansion valve, and, the openness of electromagnetic expanding valve is controlled, the final coolant quantity that flows through each electromagnetic expanding valve of adjusting according to pulse value.
Even the power of each indoor set is identical, the heat exchange area of the portion that sets within it might be different, so the big more indoor set of heat exchanger area, and more refrigerant is provided, and provide more refrigerant to the big more heat exchanger of air quantity simultaneously.The present invention determines according to the refrigerant allocation proportion of foregoing to each indoor set, mode with multiply each other indoor heat exchange area and air quantity draws indoor set self load, and be benchmark with indoor set self load, to the refrigerant allocation proportion, promptly the pulse ratio of electromagnetic expanding valve determines.Thereby, can the coolant quantity of indoor set actual needs with reference to indoor set structure etc., objectively be judged, can constitute the refrigerant loop of each indoor set the best.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (1)
1, a kind of central air-conditioning electromagnetic expansion valve control method is characterized in that:
Comprise the stage that load is calculated to each indoor set self;
According to above-mentioned each indoor set self load ratio, the stage that the electromagnetic expanding valve pulse ratio of regulating each indoor heat converter refrigerant influx is set;
Self load of described indoor set is the product of indoor heat converter area and ventilation;
Described before load is calculated to each indoor set self, carry out the stage that the power of each indoor set is judged earlier; With above-mentioned indoor set power is basic load, carries out the load revisal relevant with indoor temperature, the load revisal relevant with the difference of design temperature and indoor temperature and the relevant load revisal with outdoor temperature, the stage that each chamber load is calculated; Above-mentioned each the chamber load of addition, the stage of calculating the total load amount.
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| KR20090067740A (en) * | 2007-12-21 | 2009-06-25 | 엘지전자 주식회사 | Power divider system of air conditioner |
| JP5503376B2 (en) * | 2010-03-31 | 2014-05-28 | 光洋サーモシステム株式会社 | Heat treatment equipment |
| CN102353122B (en) * | 2011-09-26 | 2013-06-19 | Tcl空调器(中山)有限公司 | Modular multi-connection control method and system |
| CN106839206B (en) * | 2017-01-24 | 2022-10-25 | 北京智和工程技术有限公司 | Multi-connected air conditioning system and operation control method thereof |
| CN110296497B (en) * | 2018-03-21 | 2022-10-11 | 开利公司 | System and method for linking home HVAC health monitoring |
| CN110081554B (en) * | 2019-05-07 | 2020-12-25 | 珠海格力电器股份有限公司 | Control method and device of multi-split air conditioning system |
| CN112066520B (en) * | 2020-09-17 | 2022-02-22 | 无锡职业技术学院 | Intelligent building air conditioner charging and intelligent management and control system |
| CN113137712B (en) * | 2021-04-08 | 2022-03-18 | 珠海格力电器股份有限公司 | Metering method for power consumption of electronic expansion valve and air conditioner |
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