CN1782570A - Electromagnetic expansion valve control method of central air conditioner - Google Patents
Electromagnetic expansion valve control method of central air conditioner Download PDFInfo
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- CN1782570A CN1782570A CN 200410093762 CN200410093762A CN1782570A CN 1782570 A CN1782570 A CN 1782570A CN 200410093762 CN200410093762 CN 200410093762 CN 200410093762 A CN200410093762 A CN 200410093762A CN 1782570 A CN1782570 A CN 1782570A
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Abstract
The present invention relates to control method of central air conditioner, and is especially the electromagnetic expansion valve control method of central air conditioner. The control method includes the following steps: calculating the loads of different indoor units via the product of the indoor heat exchanger area and ventilation amount; and calculating the load rate pulse value of the indoor units and regulating the openings of the electromagnetic expansion valves for the refrigerant amount corresponding to the load rate to flow into different indoor units.
Description
Technical field
The present invention relates to a kind of control method of central air-conditioning, product by indoor heat converter area and air quantity draws indoor set self load ratio more precisely, and according to above-mentioned load ratio decision pulse value, by the openness that pulse value is regulated electromagnetic expanding valve, the coolant quantity of conveying each indoor set self load correspondence flows into the invention of the central air-conditioning electromagnetic expansion valve control method aspect of 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 the 1st to the 3rd indoor heat converter 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 the 1st to the 3rd auxiliary selenoid expansion valve 13a, 13b, 13c, above-mentioned auxiliary selenoid expansion valve 13a, 13b, 13c allow refrigerant flow into respective chambers heat exchanger 11a, 11b before the 11c, further expands, reduces pressure.Above-mentioned the 1st to the 3rd indoor heat converter 11a, 11b, each outlet of 11c is provided with the 1st temperature sensor 15a, 15b, 15c, to above-mentioned the 1st to the 3rd 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, in its field of confluxing, 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 the 1st to the 3rd auxiliary selenoid expansion valve 13a, 13b, 13c becomes the state of low-temp low-pressure, flows into the 1st to the 3rd indoor heat converter 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 the 1st to the 3rd 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 is the flow chart of traditional electromagnetic expansion valve control method that is used to regulate the refrigerant influx of each indoor heat converter.
When central air-conditioning carried out work, control part was got summation after the load of each chamber is calculated, and calculates the total load amount of air-conditioning integral body.Next, corresponding with above-mentioned total load amount, the power of compressor is controlled, discharge the required whole refrigerants of operation of air conditioner.
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 (S10 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 (S20 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 (S30 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 (S40 stage), the refrigerant that compressor is discharged by by each open electromagnetic expanding valve of above-mentioned pulse value, flows after being assigned with.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, be provided with under the situation of several indoor sets, the power that is used to regulate the electromagnetic expanding valve pulse value of indoor-unit cooling-medium influx and indoor set is proportional, promptly, when the power of indoor set is big, allow with it the electromagnetic expanding valve pulse value that connects also become greatly, allow a large amount of refrigerants flow into above-mentioned indoor set, and the power of indoor set hour, allow the electromagnetic expanding valve pulse value that connects with it also diminish, allow a spot of refrigerant flow into above-mentioned indoor set.
Therefore, corresponding with the power of each indoor set, to the conventional method that the coolant quantity that is assigned to each refrigerant loop determines, there are the following problems.In the conventional art,,, just be difficult to constitute the optimal refrigerant loop as long as a certain indoor set carries out work with the power that is lower than peak power though when each indoor set all moves with peak power, can keep optimum state.
Promptly, when the indoor set that carries out work, 12k with peak power such as the indoor set of 7K only carries out work with half of its power, if with the irrelevant umber of pulse that only determines electromagnetic expanding valve of indoor set actual loading with rated power, though then the indoor set of above-mentioned 7k can carry out work with suitable power, but the indoor set of above-mentioned 12k can suck much larger than the refrigerant of actual demand amount, cause the indoor set space of living in of 12k too to be freezed or too to heat, be difficult to keep adapt circumstance.
In addition, in the conventional art, compressor can be discharged the refrigerant greater than the indoor set demand, causes unnecessary expense.
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 improved central air-conditioning electromagnetic expansion valve control method, make it have more competitiveness.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
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 provide a kind of new central air-conditioning electromagnetic expansion valve control method, make it draw each chamber load by multiply each other indoor heat converter area and air quantity, by each chamber load decision electromagnetic expanding valve pulse value, control its degree of opening, the appropriate amount refrigerant of conveying each chamber actual loading correspondence flows into each indoor set.
The present invention solves its technical problem underlying and realizes by the following technical solutions.Central air-conditioning electromagnetic expansion valve control method according to the present invention proposes 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.
The present invention solves its technical problem and can also adopt following technical measures further to realize.
Preceding described indoor set self load ratio is big more, and the electromagnetic expanding valve impulse ratio is also big more.
Before self load of described indoor set be the product of indoor heat converter area and ventilation.
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, according to self load ratio of individual indoor set, promptly according to the product ratio of indoor heat converter area and air quantity, the electromagnetic expanding valve pulse ratio is adjusted, determined the refrigerant sendout of each indoor set.
Thereby, can be with reference to the indoor set actual configuration etc., the coolant quantity required to each indoor set judged objectively, can allow each indoor set constitute best refrigerant loop.
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 a conventional central air conditioner coolant loop block diagram.
Fig. 2 is the flow chart of traditional electromagnetic expansion valve control method that is used to regulate the refrigerant influx of each indoor heat converter.
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 a central air-conditioning electromagnetic expansion valve control method flow chart of the present invention.
Fig. 7 is the electromagnetic expanding valve impulse ratio icon corresponding with indoor set power, and (a) pulse ratio in the expression conventional method (b) is represented pulse ratio of the present invention.
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: outdoor heat converter 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 is further examined survey to 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 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.
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 an electromagnetic expansion valve control method flow chart of the present invention.Here with reference to the central air-conditioning of Fig. 5, above-mentioned control method is described.
At first, in above-mentioned central air-conditioning of the present invention shown in Figure 5, the 1st indoor set 142, compressor 182,184, outdoor heat converter the 194, the 1st electromagnetic expanding valve 162 constitute the 1st refrigerant loop.The 2nd indoor set 144, compressor 182,184, outdoor heat converter the 194, the 2nd electromagnetic expanding valve 164 constitute the 2nd refrigerant loop.The 3rd indoor set 146, compressor 182,184, outdoor heat converter the 194, the 3rd electromagnetic expanding valve 166 constitute the 3rd refrigerant loop.
After air-conditioning brought into operation, at first, controller calculated the load in each refrigerant loop, and they are carried out summation, calculated the total load amount of whole air-conditioning.Next, regulate the power of compressor 182,184, it is discharged and the corresponding refrigerant of above-mentioned total load amount.When freezing, the refrigerant that above-mentioned compressor 182,184 is discharged flows through above-mentioned outdoor heat exchange to be risen and was condensed in 194 o'clock, after flowing through above-mentioned the 1st, the 2nd, the 3rd electromagnetic expanding valve and being assigned with, expanding, flow into the 1st, the 2nd, the 3rd indoor set 142,144,146 that is connected with above-mentioned each electromagnetic expanding valve respectively at 162,164,166 o'clock.
Flow into the refrigerant of above-mentioned the 1st, the 2nd, the 3rd indoor set 142,144,146 indoor sets, its influx is controlled by the openness of above-mentioned the 1st, the 2nd, the 3rd electromagnetic expanding valve 162,164,166.And above-mentioned openness is to control by the pulse value of adjusting corresponding electromagnetic expanding valve.Specifically, the coolant quantity of above-mentioned each indoor set of inflow is proportionate relationship with corresponding each electromagnetic expanding valve pulse value.Therefore improve the refrigerant influx of indoor set if desired, then must improve above-mentioned pulse value.Reduce the refrigerant influx of indoor set if desired, then correspondingly reduce above-mentioned pulse value.
In addition, the refrigerant that the compressor of the total load amount correspondence of air-conditioning is discharged flows through in the process of above-mentioned the 1st, the 2nd, the 3rd electromagnetic expanding valve 162,164,166, is allocated to the coolant quantity corresponding with each indoor set.At this moment refrigerant allocation proportion is the key factor of each indoor-unit cooling-medium influx of decision.
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.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 7K, 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 (S100 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 (S110 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 (S120 stage).
In the aforementioned 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 (S130 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.
Fig. 7 is the electromagnetic expanding valve impulse ratio icon corresponding with indoor set power, and (a) pulse ratio in the expression conventional method (b) is represented pulse ratio of the present invention.
In the conventional art, be direct proportionate relationship between the pulse ratio of electromagnetic expanding valve and the indoor set power.Among the present invention, the relation of above-mentioned impulse ratio and indoor set power is not the simple proportional relation.
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 (3)
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.
2, central air-conditioning electromagnetic expansion valve control method according to claim 1 is characterized in that: wherein said indoor set self load ratio is big more, and the electromagnetic expanding valve impulse ratio is also big more.
3, central air-conditioning electromagnetic expansion valve control method according to claim 1 is characterized in that: self load of wherein said indoor set is the product of indoor heat converter area and ventilation.
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| CN 200410093762 CN1782570A (en) | 2004-11-30 | 2004-11-30 | Electromagnetic expansion valve control method of central air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208344A (en) * | 2010-03-31 | 2011-10-05 | 光洋热系统株式会社 | Thermal processing apparatus |
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2004
- 2004-11-30 CN CN 200410093762 patent/CN1782570A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208344A (en) * | 2010-03-31 | 2011-10-05 | 光洋热系统株式会社 | Thermal processing apparatus |
| CN102208344B (en) * | 2010-03-31 | 2016-03-30 | 光洋热系统株式会社 | Annealing device |
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