CN101089500A - Duplex air governor and its control method - Google Patents
Duplex air governor and its control method Download PDFInfo
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- CN101089500A CN101089500A CN 200610086731 CN200610086731A CN101089500A CN 101089500 A CN101089500 A CN 101089500A CN 200610086731 CN200610086731 CN 200610086731 CN 200610086731 A CN200610086731 A CN 200610086731A CN 101089500 A CN101089500 A CN 101089500A
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Abstract
The present invention relates to a duplex air conditioner and its control method. It is characterized by that in the duplex air conditioner composed of outdoor machine in which an outdoor heat exchanger, a compressor and on electronic expansion valve are mounted and several indoor machines which are connected together a detection portion for determining temperature of above-mentioned outdoor heat exchanger, suction temperature and discharge temperature of compressor and condensation temperature of every indoor machine and a control portion which can be used for controlling above-mentioned electronic expansion valve, making it utilize the compressor suction temperature determined by above-mentioned election portion and temperature of outdoor heat exchanger to calculate temperature difference and judge suction super heating temperature, at the same time making the suction super heating temperature be raised to more than defined temperature according to the condensation temperature of above-mentioned indoor machine are included. Besides, said invention also provides the concrete steps of its control method.
Description
Technical field
The present invention relates to a kind of compound air conditioner and control method thereof, particularly relate to a kind of with the greenhouse mode operation time by electric expansion valve is controlled, its temperature difference according to the inlet temperature of compressor and outdoor heat exchanger is judged sucking the degree of superheat, and the above-mentioned suction degree of superheat is promoted to compound air conditioner and control method thereof more than the assigned temperature according to the condensation temperature of indoor set.
Background technology
Usually, air-conditioning mainly be meant by the refrigerant to appointment compress, evaporation, condensation, make its cold air that utilizes fan to be produced when carrying out heat exchange with surrounding air in the process of refrigerant evaporation be blown into indoor cold-room equipment.In having the building of a plurality of independent interior spaces, often use by at each a plurality of indoor set of installing separately of the interior space independently; And the compound air conditioner of an off-premises station formation that is connected with above-mentioned indoor set.
In addition, recycled back is carried out in the compression, evaporation, the cohesion that have also occurred recently having by to refrigerant, make its hot-air that utilizes fan to be produced when carrying out heat exchange with ambient air in the process of refrigerant condensation be blown into the cooling-heating room dual-purpose function air-conditioning of indoor greenhouse function, thereby make air-conditioning can be used for regulating indoor temperature at all seasons.
Fig. 1 carries out illustrated oblique view to the structure based on the compound air conditioner of prior art, and Fig. 2 carries out illustrated structure chart to the off-premises station based on the compound air conditioner of prior art.
Based on the compound air conditioner of prior art as shown in Figure 1, constitute by a plurality of off- premises stations 1,2,3 and a plurality of indoor set that connect by the refrigerant comb, and according to the compound needs at least of above-mentioned indoor set to driving more than in the above-mentioned off- premises station 1,2,3.
Wherein, above-mentioned off-premises station 1 comprises the reservoir 4 that the refrigerant that is used for supplying at indoor set extracts gaseous coolant; Receive by above-mentioned reservoir 4) gaseous coolant of extraction, and it is carried out compressor for compressing 5,6; By being connected to above-mentioned compressor 5,6, the cross valve 7 that the stream of institute's compression refrigerant is selected; The outdoor heat exchanger 8 that the refrigerant supplied by above-mentioned cross valve 7 and outdoor air are carried out heat exchange.
Wherein, above-mentioned compressor 5,6 comprises the frequency-changeable compressor 5 that can regulate the refrigerant compression horsepower that is spued; The constant speed compressor 6 of the specified power that only spues refrigerant, and other off- premises station 2,3 is different with above-mentioned off-premises station 1, and two constant speed compressors 6 only are installed.
Especially in above-mentioned off-premises station 1, above-mentioned frequency-changeable compressor accounts for 70% of whole refrigerant compression horsepower, and 6 of above-mentioned constant speed compressors account for remaining 30%.
In addition, indoor set is connected with above-mentioned off-premises station 1 by the refrigerant comb, comprises that the indoor heat exchanger figure that is used for above-mentioned each compressor 5,6 refrigerant that spued carry out condensation does not mark; The heat that is discharged in the above-mentioned indoor heat exchanger spued to indoor indoor fan figure, do not mark.
Below, the job order of the off-premises station of existing compound air conditioner is described.
When at first the some indoor sets in above-mentioned a plurality of indoor sets are driven, the 1st off-premises station 1 that above-mentioned frequency-changeable compressor 5 is installed also will be driven simultaneously, and above-mentioned indoor set required cold/drive when greenhouse power increases and then to remaining compressor 6 or off- premises station 2,3.
Be that above-mentioned frequency-changeable compressor 5 all will at first be driven when any indoor set is driven, so that satisfy the cold/greenhouse load of indoor set.
When above-mentioned indoor set required cold/when greenhouse load surpasses the power of above-mentioned frequency-changeable compressor 5, constant speed compressor 6 in above-mentioned the 1st off-premises station 1 or the constant speed compressor 6 in other off- premises stations 2,3 will be driven, thereby the compression horsepower that replaces above-mentioned frequency-changeable compressor 5 makes above-mentioned frequency-changeable compressor 5 carry out work with lowest compression power; And when indoor set cold/when greenhouse power further increased, the compression horsepower of above-mentioned frequency-changeable compressor 5 will promote again so that satisfy above-mentioned cold/increase of greenhouse power.
Simultaneously by the direction of above-mentioned cross valve 7 is adjusted, can make refrigerant in the above-mentioned compound air conditioner with forward or reverse circulation, thereby with greenhouse pattern or cold-room mode operation.With the greenhouse mode operation time, to flow through successively among cross valve 7, indoor heat exchanger, the plavini figure by the refrigerant after above-mentioned compressor 5,6 compression do not mark, outdoor heat exchanger 8, compressor 5,6, finally in above-mentioned indoor heat exchanger, above-mentioned refrigerant carried out condensation and to indoor release heat.This shows that the greenhouse operational mode of air-conditioning is opposite with the cold-room operational mode, above-mentioned off-premises station 1 then is used as freezing machine as the above-mentioned indoor set of rapid steamer.
But aforesaid existing compound air conditioner during with the greenhouse mode operation, utilizes expansion valve that the flow of refrigerant is regulated under single row of tubes duplex state.If the condensation temperature of indoor set is more than or equal to the temperature that spues of compressor at this moment, then refrigerant will flow in the compressor and cause the hydraulic pressure phenomenon that contracts to take place, thereby cause damage to make it can't normally move and make the life-span of compressor and trustworthiness significantly to descend to compressor.
This shows that above-mentioned existing compound air conditioner and control method thereof obviously still have inconvenience and defective, and demand urgently further being improved in structure and use.In order to solve the problem that compound air conditioner and control method thereof exist, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing compound air conditioner and control method thereof exist, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of the compound air conditioner and the control method thereof of founding a kind of new structure, can improve general existing compound air conditioner and control method thereof, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
Main purpose of the present invention is, overcome the defective that existing compound air conditioner and control method thereof exist, and provide a kind of novel compound air conditioner and control method thereof, technical problem to be solved is to make it by electric expansion valve is controlled, make the air-conditioning can be with the greenhouse mode operation time according to the inlet temperature of compressor and the temperature difference of outdoor heat exchanger, be promoted to condensation temperature than indoor set and exceed state more than the assigned temperature sucking the degree of superheat, phenomenon takes place and the trustworthiness and the stability of raising compressor can to prevent hydraulic pressure to contract, thereby is suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of compound air conditioner according to the present invention's proposition, be the compound air conditioner that is connected and composed by off-premises station that outdoor heat exchanger and compressor and electric expansion valve are installed and indoor set, it comprises: the test section that the condensation temperature of the temperature of above-mentioned outdoor heat exchanger, the suction of compressor and the temperature that spues, indoor set is measured; And by electric expansion valve is controlled, make its thermometer calculate temperature difference and judge, will suck the degree of superheat according to the condensation temperature of above-mentioned indoor set simultaneously and be promoted to control part more than the assigned temperature temperature sucking the degree of superheat according to the inlet temperature of the compressor that utilizes above-mentioned test section to measure and outdoor heat exchanger.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid compound air conditioner, wherein said control part comprises: to calculating by detected each temperature of above-mentioned test section, thus the temperature judging part that the condensation temperature of the above-mentioned suction degree of superheat and indoor set is judged; And, make it will suck the degree of superheat and be promoted to electronic expansion valve controls portion more than the assigned temperature according to the above-mentioned indoor set condensation temperature of judging by electric expansion valve is controlled.
Aforesaid compound air conditioner, wherein said assigned temperature are 15 ℃.
Aforesaid compound air conditioner utilizes the spue mean temperature of temperature of the indoor side comb inlet temperature of above-mentioned indoor set and an indoor side comb, calculates the condensation temperature of above-mentioned indoor set.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.The control method of a kind of compound air conditioner that proposes according to the present invention, it may further comprise the steps: the 1st stage that the condensation temperature of the suction of outdoor heat exchanger and compressor and the temperature that spues, indoor set is detected; By above-mentioned detected each temperature is compared and calculates, the 2nd stage that the condensation temperature that sucks the degree of superheat and indoor set is judged; And according to the above-mentioned condensation temperature of judging electric expansion valve is controlled, make to suck the degree of superheat and be promoted to the 3rd above stage of assigned temperature.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The control method of aforesaid compound air conditioner wherein in described above-mentioned the 2nd stage, is judged to be the suction degree of superheat by the temperature difference that calculates between above-mentioned detected compressor inlet temperature and the outdoor heat exchanger; The spue mean temperature of temperature of the comb of a comb inlet temperature by calculating the indoor side of above-mentioned indoor set and an indoor side is judged to be the condensation temperature of indoor set simultaneously.
The control method of aforesaid compound air conditioner wherein in above-mentioned the 3rd stage, makes to suck the degree of superheat and remain on and exceed 15 ℃ state than the condensation temperature of above-mentioned indoor set.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, the invention provides a kind of compound air conditioner, in the compound air conditioner that connects and composes by off-premises station that outdoor heat exchanger and compressor and electric expansion valve are installed and indoor set, comprise the test section that the condensation temperature of the temperature to above-mentioned outdoor heat exchanger, the suction of compressor and the temperature that spues, indoor set is measured; By electric expansion valve is controlled, make its thermometer calculate temperature difference and judge, will suck the degree of superheat according to the condensation temperature of above-mentioned indoor set simultaneously and be promoted to control part more than the assigned temperature temperature sucking the degree of superheat according to the inlet temperature of the compressor that utilizes above-mentioned test section to measure and outdoor heat exchanger.
In addition, another content of the present invention is to propose a kind of control method of compound air conditioner, and it comprises the 1st stage that the condensation temperature to the suction of outdoor heat exchanger and compressor and the temperature that spues, indoor set detects; By above-mentioned detected each temperature is compared and calculates, the 2nd stage that the condensation temperature that sucks the degree of superheat and indoor set is judged; According to the above-mentioned condensation temperature of judging electric expansion valve is controlled, made the suction degree of superheat be promoted to the 3rd above stage of assigned temperature.
Via as can be known above-mentioned, in the compound air conditioner that connects and composes by off-premises station that outdoor heat exchanger and compressor and electric expansion valve are installed and indoor set, comprise the test section that the condensation temperature of the temperature to above-mentioned outdoor heat exchanger, the suction of compressor and the temperature that spues, indoor set is measured; By electric expansion valve is controlled, make its thermometer calculate temperature difference and judge, will suck the degree of superheat according to the condensation temperature of above-mentioned indoor set simultaneously and be promoted to control part more than the assigned temperature sucking the degree of superheat according to the inlet temperature of the compressor that utilizes above-mentioned test section to measure and outdoor heat exchanger.Utilize said structure, can prevent that refrigerant from flowing into the phenomenon that causes hydraulic pressure to contract in the compressor and taking place, thereby improve the trustworthiness and the stability of compressor and effectively improve indoor greenhouse performance.
By technique scheme, compound air conditioner of the present invention and control method thereof have following advantage at least:
The compound air conditioner suitable of the present invention and the control method thereof of structure as mentioned above, by electric expansion valve is controlled, make air-conditioning with the greenhouse mode operation time, can determine the suction degree of superheat according to the inlet temperature of compressor and the temperature difference of outdoor heat exchanger, and will suck the degree of superheat and be promoted to condensation temperature than indoor set and exceed state more than the assigned temperature, thereby prevent that refrigerant from flowing into the hydraulic pressure that is caused in the compressor phenomenon that contracts and taking place, with this greenhouse effect that improves the trustworthiness and the stability of compressor and improve an indoor side.
In sum, the compound air conditioner of special construction of the present invention and control method thereof, it is by controlling electric expansion valve, make the air-conditioning can be with the greenhouse mode operation time according to the inlet temperature of compressor and the temperature difference of outdoor heat exchanger, be promoted to condensation temperature than indoor set and exceed state more than the assigned temperature sucking the degree of superheat, phenomenon takes place and the trustworthiness and the stability of raising compressor can to prevent hydraulic pressure to contract, it has above-mentioned many advantages and practical value, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it structurally or bigger improvement all arranged on the function, have large improvement technically, and produced handy and practical effect, and more existing compound air conditioner and control method thereof have the multinomial effect of enhancement, thereby be suitable for practicality more, and have the extensive value of industry, really be a novelty, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for 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 carries out illustrated oblique view to the structure based on the compound air conditioner of prior art.
Fig. 2 carries out illustrated structure chart to the off-premises station based on the compound air conditioner of prior art.
Fig. 3 carries out illustrated oblique view to the structure that is suitable for compound air conditioner of the present invention.
Fig. 4 carries out illustrated structure chart to the off-premises station that is suitable for compound air conditioner of the present invention.
Fig. 5 carries out illustrated figure to the structure that is suitable for compound air conditioner of the present invention.
Fig. 6 carries out illustrated precedence diagram to the control method that is suitable for compound air conditioner of the present invention.
100: off-premises station 110: test section
120: control part 121: the temperature judging part
122: electric expansion valve adjusting portion 200: indoor set
The specific embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to compound air conditioner and its specific embodiment of control method, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Below, be described in detail being suitable for embodiments of the invention in conjunction with the accompanying drawings.Fig. 3 carries out illustrated oblique view to the structure that is suitable for compound air conditioner of the present invention, and Fig. 4 carries out illustrated structure chart to the off-premises station that is suitable for compound air conditioner of the present invention.
Be suitable for compound air conditioner of the present invention as shown in Figure 3 and Figure 4, by being installed on the indoor a plurality of indoor sets of building 11,12,13,14; The off- premises station 21,22,23 that is connected in the above-mentioned indoor set 11,12,13,14 constitutes.Above-mentioned indoor set 11,12,13,14 is connected by refrigerant comb 30,40 with above-mentioned off- premises station 21,22,23, and above-mentioned off- premises station 21,22,23 at least more than one in above-mentioned indoor set 11,12,13,14 is driven when sending request, simultaneously above-mentioned indoor set 11,12,13,14 required cold/when greenhouse power increases, driven quantity and the quantity that is installed on the compressor starts work in the above-mentioned off- premises station 21,22 also will increase thereupon in the above-mentioned off- premises station 21,22,23.
Wherein, above-mentioned indoor set 11,12,13,14 comprises the indoor heat exchanger 51 that makes refrigerant and room air carry out heat exchange; Be installed on above-mentioned indoor heat exchanger 51 near be used for indoor blower 52 that room air is circulated; With the cold-room mode operation time, be used for indoor expansion valve 54 that the refrigerant that flows through above-mentioned indoor heat exchanger 51 is expanded.
In addition, above-mentioned off- premises station 21,22,23 is made of the 1st, the 2nd, the 3rd off- premises station 21,22,23 as shown in Figure 4, and comprises the reservoir 61 that the refrigerant that is used for supplying at indoor set extracts gaseous coolant; Receive gaseous coolant, and it is carried out compressor for compressing 62,63,67 by above-mentioned reservoir 61 extractions; By being connected to above-mentioned compressor 62,63, the cross valve 65 that the trip road of institute's compression refrigerant is selected; The outdoor heat exchanger 70 that the refrigerant supplied by above-mentioned cross valve 65 and outdoor air are carried out heat exchange.
Wherein, in above-mentioned the 1st off-premises station 21 frequency-changeable compressor 62 and constant speed compressor 63 are installed, and in above-mentioned the 2nd, the 3rd compressor 22,23 a plurality of constant speed compressors 67 only are installed.Wherein above-mentioned frequency-changeable compressor 62 is the compressors that can regulate the refrigerant compression horsepower, and above-mentioned constant speed compressor the 63, the 67th, the compressor that the compression horsepower of refrigerant is fixing.
And, above-mentioned frequency-changeable compressor 62 accounts for 70% of above-mentioned the 1st off-premises station 21 compression horsepower, account for remainingly 30% and be installed on constant speed compressor 63 in above-mentioned the 1st off-premises station 21,67 of constant speed compressors in other off- premises stations 22,23 account for 50% of compression horsepower respectively.
In addition, in above-mentioned compressor 62,63 and the comb that above-mentioned cross valve 65 is connected separator 64 is installed, and above-mentioned separator 64 is installed in suction one side of above-mentioned compressor 62,63.
And between above-mentioned separator 64 and above-mentioned compressor 62,63,67, also be equipped with and be used for pressure sensor 107 that the refrigerant pressure that above-mentioned compressor 62,63,67 spues is detected.
Especially above-mentioned separator 64 can separate machine oil in above-mentioned compressor 62,63 refrigerants that spued, and above-mentioned isolated machine oil is supplied in the above-mentioned compressor 62,63, thereby guarantee that above-mentioned compressor 62,63 inside can keep an amount of machine oil.To utilize capillary 66 to connect between the suction one side comb of this external above-mentioned separator 64 and above-mentioned compressor 62,63, thereby good performance is moved by above-mentioned capillary 66.
In addition, at the refrigerant comb 30 that is used for the refrigerant that above-mentioned outdoor heat exchanger 70 is spued is guided to above-mentioned indoor heat exchanger 51, the electric expansion valve 74lev that when comprising refrigerant is expanded with the greenhouse mode operation; The apparatus for supercooling 80 that during with the cold-room mode operation refrigerant that moves in the above-mentioned indoor heat exchanger 51 is cooled off; Be used to reduce the refrigerant injection device 90 of above-mentioned compressor 62,63 temperature.
Wherein, above-mentioned outdoor electric expansion valve 74 will be open fully with the cold-room mode operation time, make the refrigerant of condensation in above-mentioned outdoor heat exchanger pass through under situation about not expanding; With the greenhouse mode operation time, then be open into certain angle, make the refrigerant of condensation in indoor heat exchanger 51 before flowing into above-mentioned outdoor heat exchanger 70 it is expanded to the liquid of atomize.
In addition, the drying machine of removing at the inner moisture of refrigerant comb 30 " in also be equipped be used for " 110 to above-mentioned refrigerant comb 30, and will walk around above-mentioned refrigerant comb 30 by the refrigerant of above-mentioned drying machine 110 and " flow to above-mentioned indoor heat exchanger 51 1 sides.
Fig. 5 carries out illustrated figure to the structure that is suitable for compound air conditioner of the present invention, and Fig. 6 carries out illustrated precedence diagram to the control method that is suitable for compound air conditioner of the present invention.
Be suitable for compound air conditioner of the present invention as shown in Figure 5, connect and compose by off-premises station 100 that outdoor heat exchanger, compressor and electric expansion valve are installed and indoor set 200.
Above-mentioned off-premises station 100 comprises that the comb of the temperature to above-mentioned outdoor heat exchanger, the suction of compressor and the temperature that spues, indoor set sucks/spue the test section 110 that temperature is measured; By electric expansion valve is controlled, make its thermometer calculate temperature difference and judge, will suck the degree of superheat according to the condensation temperature of above-mentioned indoor set simultaneously and be promoted to control part 120 more than the assigned temperature sucking the degree of superheat according to the inlet temperature of the compressor that utilizes above-mentioned test section 110 to measure and outdoor heat exchanger.
For above-mentioned each temperature is detected, in suction one side and the side that spues of the outdoor heat exchanger of above-mentioned test section 110, suction one side of compressor and the side that spues, indoor set comb, be separately installed with a plurality of sensors that the suction/temperature that spues of the suction/temperature that spues, the indoor set comb of the temperature that is used for outdoor heat exchanger, compressor detects.
In above-mentioned control part 120, comprise calculating by above-mentioned test section 110 detected each temperature, thus the temperature judging part 121 that the condensation temperature of the above-mentioned suction degree of superheat and indoor set is judged; By electric expansion valve is controlled, make it will suck the degree of superheat and be promoted to electronic expansion valve controls portion more than the assigned temperature according to the above-mentioned indoor set condensation temperature of judging.
In said temperature judging part 120, will be to comparing and calculate by above-mentioned test section 110 detected each temperature, thus judge the condensation temperature that sucks the degree of superheat and indoor set.
Wherein, temperature judging part 120 is after the temperature difference that calculates between above-mentioned detected compressor inlet temperature and the outdoor heat exchanger, and the temperature difference that aforementioned calculation is gone out is judged to be the suction degree of superheat; Spue after the mean temperature of temperature calculating above-mentioned indoor set comb inlet temperature and comb simultaneously, the mean temperature that aforementioned calculation is gone out is judged to be the condensation temperature of indoor set.
Above-mentioned electric expansion valve adjusting portion 122 is regulated by the degree of opening to electric expansion valve, the suction degree of superheat is promoted to than the indoor set condensation temperature of being judged in the said temperature judging part 120 exceeds about temperature more than 15 ℃.
Wherein, above-mentioned electric expansion valve adjusting portion 122 is promoted to than above-mentioned indoor set condensation temperature the suction degree of superheat and exceeds about temperature more than 15 ℃ by electric expansion valve is controlled.This is because when the above-mentioned suction degree of superheat is less than or equal to the condensation temperature of above-mentioned indoor set, and refrigerant will flow in the above-mentioned compressor and cause the hydraulic pressure phenomenon generation of contracting.Therefore in order to prevent the contract generation of phenomenon of above-mentioned hydraulic pressure,, the above-mentioned suction degree of superheat is promoted to than indoor set condensation temperature exceeds about 15 ℃ temperature by electric expansion valve is controlled.
Simultaneously, above-mentioned electric expansion valve adjusting portion 122 is by regulating electric expansion valve, and the comb of the above-mentioned indoor set temperature that spues is maintained at about more than 35 ℃.
For example when the comb inlet temperature of above-mentioned indoor set is higher than comb and spues temperature, the flow of an indoor side refrigerant will reduce.Therefore in order to improve the greenhouse performance of an indoor side, above-mentioned electric expansion valve adjusting portion 122 will be carried out 2 openings to electric expansion valve in each control cycle, thereby its temperature is maintained at about more than 35 ℃.
See also shown in Figure 6ly, at first utilize a plurality of sensors installed respectively the temperature of outdoor heat exchanger, compressor, indoor set to be detected S1.
For example, by in the suction one side/side that spues of above-mentioned outdoor heat exchanger, compressor, the suction one side/side that spues of indoor set comb a plurality of sensors being installed respectively, the temperature to the suction one side/side that spues of the spuing of the temperature of above-mentioned outdoor heat exchanger, compressor/inlet temperature, indoor set comb detects respectively.
Then, judge the condensation temperature S2 that sucks the degree of superheat and indoor set, S3 by above-mentioned detected each temperature is compared and calculates.
Wherein, after the temperature difference that calculates between above-mentioned detected compressor inlet temperature and the outdoor heat exchanger, the temperature difference that aforementioned calculation is gone out is judged to be the suction degree of superheat; Spue after the mean temperature of temperature calculating above-mentioned indoor set comb inlet temperature and comb simultaneously, the mean temperature that aforementioned calculation is gone out is judged to be the condensation temperature of indoor set.
At this moment, by electric expansion valve is controlled, make to suck the degree of superheat and be promoted to than the above-mentioned indoor set condensation temperature of judging and exceed temperature S4 more than the assigned temperature.
For example, spue the mean temperature of temperature when sucking the degree of superheat at the comb inlet temperature of above-mentioned indoor set and comb, refrigerant will flow in the above-mentioned compressor and cause the hydraulic pressure phenomenon generation of contracting.Therefore in order to prevent the contract generation of phenomenon of above-mentioned hydraulic pressure,, the above-mentioned suction degree of superheat is promoted to than indoor set condensation temperature exceeds about 15 ℃ temperature by electric expansion valve is controlled.
Also will make it promoting in the process that sucks the degree of superheat simultaneously, guarantee that the temperature that spues of above-mentioned indoor set comb remains on more than the assigned temperature by electric expansion valve is controlled by electric expansion valve is controlled.
Promptly, because the temperature increase that can spue by the comb with above-mentioned indoor set to the state higher than comb inlet temperature improves an indoor side greenhouse performance, above-mentioned electric expansion valve is controlled, the above-mentioned indoor side comb temperature that spues is maintained at about more than 35 ℃.
Be illustrated being suitable for compound air conditioner of the present invention and control method thereof in conjunction with the accompanying drawings above, but embodiment that the present invention is not limited to illustrate in this specification and accompanying drawing can also be employed in the scope that is subjected to its technological thought protection.
The compound air conditioner of the present invention that above-mentioned structure like this constitutes and the technological innovation of control method thereof all have many saving graces for technical staff of the same trade now, and the progressive that possesses skills really.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (7)
1, a kind of compound air conditioner is the compound air conditioner that is connected and composed by off-premises station that outdoor heat exchanger and compressor and electric expansion valve are installed and indoor set, it is characterized in that it comprises:
The test section that the condensation temperature of the temperature of above-mentioned outdoor heat exchanger, the suction of compressor and the temperature that spues, indoor set is measured; And
By electric expansion valve is controlled, make its thermometer calculate temperature difference and judge, will suck the degree of superheat according to the condensation temperature of above-mentioned indoor set simultaneously and be promoted to control part more than the assigned temperature sucking the degree of superheat according to the inlet temperature of the compressor that utilizes above-mentioned test section to measure and outdoor heat exchanger.
2, compound air conditioner according to claim 1 is characterized in that above-mentioned control part comprises:
To calculating by detected each temperature of above-mentioned test section, thus the temperature judging part that the condensation temperature of the above-mentioned suction degree of superheat and indoor set is judged; And
By electric expansion valve is controlled, make it will suck the degree of superheat and be promoted to electronic expansion valve controls portion more than the assigned temperature according to the above-mentioned indoor set condensation temperature of judging.
3, compound air conditioner according to claim 2 is characterized in that above-mentioned assigned temperature is 15 ℃.
4, compound air conditioner according to claim 2 is characterized in that: utilize the spue mean temperature of temperature of the indoor side comb inlet temperature of above-mentioned indoor set and an indoor side comb, calculate the condensation temperature of above-mentioned indoor set.
5, a kind of control method of compound air conditioner is characterized in that it may further comprise the steps:
The 1st stage that the condensation temperature of the suction of outdoor heat exchanger and compressor and the temperature that spues, indoor set is detected;
By above-mentioned detected each temperature is compared and calculates, the 2nd stage that the condensation temperature that sucks the degree of superheat and indoor set is judged; And
According to the above-mentioned condensation temperature of judging electric expansion valve is controlled, made the suction degree of superheat be promoted to the 3rd above stage of assigned temperature.
6, the control method of compound air conditioner according to claim 5 is characterized in that in above-mentioned the 2nd stage, was judged to be the suction degree of superheat by the temperature difference that calculates between above-mentioned detected compressor inlet temperature and the outdoor heat exchanger; The spue mean temperature of temperature of the comb of a comb inlet temperature by calculating the indoor side of above-mentioned indoor set and an indoor side is judged to be the condensation temperature of indoor set simultaneously.
7, the control method of compound air conditioner according to claim 5 is characterized in that in above-mentioned the 3rd stage, made to suck the degree of superheat and remain on and exceed 15 ℃ state than the condensation temperature of above-mentioned indoor set.
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| CN 200610086731 CN101089500A (en) | 2006-06-16 | 2006-06-16 | Duplex air governor and its control method |
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| CN 200610086731 CN101089500A (en) | 2006-06-16 | 2006-06-16 | Duplex air governor and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102331067A (en) * | 2011-05-24 | 2012-01-25 | 宁波奥克斯电气有限公司 | Control method for protection of compressor during refrigeration cycle of direct-current frequency-conversion air conditioner |
| CN102353120A (en) * | 2011-08-31 | 2012-02-15 | 宁波奥克斯电气有限公司 | Control method for preventing refrigerant partial flowing in refrigeration of multi-connection-type air-conditioning unit |
| CN102692328A (en) * | 2011-03-24 | 2012-09-26 | 珠海格力电器股份有限公司 | System and method for detecting multi-split air conditioner |
| CN103109460A (en) * | 2010-09-28 | 2013-05-15 | 日产自动车株式会社 | Temperature protection device |
| WO2023206804A1 (en) * | 2022-04-29 | 2023-11-02 | 青岛海信日立空调系统有限公司 | Air conditioning system and method for calculating operation parameters of indoor unit thereof |
-
2006
- 2006-06-16 CN CN 200610086731 patent/CN101089500A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103109460A (en) * | 2010-09-28 | 2013-05-15 | 日产自动车株式会社 | Temperature protection device |
| CN103109460B (en) * | 2010-09-28 | 2015-12-16 | 日产自动车株式会社 | Temperature protective device |
| CN102692328A (en) * | 2011-03-24 | 2012-09-26 | 珠海格力电器股份有限公司 | System and method for detecting multi-split air conditioner |
| CN102692328B (en) * | 2011-03-24 | 2014-08-27 | 珠海格力电器股份有限公司 | System and method for detecting multi-split air conditioner |
| CN102331067A (en) * | 2011-05-24 | 2012-01-25 | 宁波奥克斯电气有限公司 | Control method for protection of compressor during refrigeration cycle of direct-current frequency-conversion air conditioner |
| CN102353120A (en) * | 2011-08-31 | 2012-02-15 | 宁波奥克斯电气有限公司 | Control method for preventing refrigerant partial flowing in refrigeration of multi-connection-type air-conditioning unit |
| CN102353120B (en) * | 2011-08-31 | 2013-08-07 | 宁波奥克斯电气有限公司 | Control method for preventing refrigerant partial flowing in refrigeration of multi-connection-type air-conditioning unit |
| WO2023206804A1 (en) * | 2022-04-29 | 2023-11-02 | 青岛海信日立空调系统有限公司 | Air conditioning system and method for calculating operation parameters of indoor unit thereof |
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