CN101504180B - Substitution control method for fault air suction sensor in air conditioner and air conditioner thereof - Google Patents
Substitution control method for fault air suction sensor in air conditioner and air conditioner thereof Download PDFInfo
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- CN101504180B CN101504180B CN2009100196105A CN200910019610A CN101504180B CN 101504180 B CN101504180 B CN 101504180B CN 2009100196105 A CN2009100196105 A CN 2009100196105A CN 200910019610 A CN200910019610 A CN 200910019610A CN 101504180 B CN101504180 B CN 101504180B
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Abstract
The invention discloses a substitution and control method for a fault suction gas sensor in an air conditioner and the air conditioner. The air conditioner comprises a suction gas sensor for measuring the suction gas temperature of a compressor and a gas pipe sensor for measuring the gas pipe temperature; when the suction gas sensor of the air conditioner has fault and a main control module corrects the detection value of the gas pipe sensor arranged on the gas pipe, substitutes the detection value of the suction gas sensor and participates in the control and calculation while reporting the error to the outside, thereby ensuring that the unit of the entire machine of the air conditioner can continuously run with no stop while reporting the error and waiting for maintenance, further avoiding the inconvenience brought to users caused by disorderly closedown and improving the service comfort of products. The substitution and control method is particularly suitable for air conditioners ofwhich one indoor unit drives multiple outdoor units.
Description
Technical field
The invention belongs to air-conditioning and Refrigeration Engineering technical field, relate to a kind of multi-split air conditioner, specifically, when relating to a kind of air suction sensor in multi-split air conditioner and breaking down, be to keep air-conditioner to continue a kind of interim control method that substitutes that operation is taked.
Background technology
Air-conditioner, multi-split air conditioner particularly, its primary control program need utilize the parameter value that is distributed in the temperature sensor measurement at each control point in the refrigeration system to participate in control calculating or judge when operation, such as tracheae sensor, liquid tube sensor, air suction sensor, coil pipe sensor and defrosting sensor etc., thereby according to calculating or judged result realizes control to parts such as compressor, electronic throttle expansion valve, blower fans.If certain sensor breaks down, primary control program will be judged, calculate because of lacking necessary temperature parameter value, thereby can not move control normally.When this thing happens, present air-conditioner often adopted to shut down and reports an error, waits for that the mode of maintenance handles, thereby has influenced user's normal use, makes troubles for user's use.
Summary of the invention
The present invention is in order to solve existing air-conditioner adopts shutdown to report an error problem that processing mode impacts user's daily use when sensor breaks down; the alternative control method of air conditioner fault sensor under a kind of refrigeration mode has been proposed; specifically be in air-conditioner, to be used for the air suction sensor of measuring chamber external compression machine suction temperature when breaking down; the method that employing is revised the measured value of tracheae sensor replaces the measured value of air suction sensor; and then participate in the control calculating of main control module, guarantee the air-conditioner continuous service with this.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The alternative control method of fault air suction sensor in the air-conditioner under a kind of refrigeration mode, described air suction sensor is used for measuring the suction temperature of compressor in the off-premises station; When described air suction sensor breaks down, the detected value of the tracheae sensor on the tracheae that is arranged on the online pipe of indoor and outdoor is revised the detected value that substitutes described air suction sensor afterwards participate in control calculating, thereby keep the air-conditioner continuous service.
For multi-split air conditioner, when described air suction sensor breaks down, read the detected value of the pairing tracheae sensor of tracheae of the online pipe of all start indoor sets, and to after the described detected value averaged with correction value Δ t addition, the gained result is participated in the control calculating as the substitution value of the detected value of air suction sensor, can improve the accuracy of control like this.
Further, the detected value of described tracheae sensor is the temperature value in this moment of tracheae; Described correction value Δ t is value in 0 ℃～5 ℃ scopes.
Further again, described air-conditioner receives the detected value of the gentle tube sensor of described air suction sensor output by its inner main control module, when the detected value of the air suction sensor that receives is zero or when infinitely great, thinks that described air suction sensor breaks down.
Based on above-mentioned alternative control method, the invention allows for a kind of air-conditioner that adopts this alternative control method, comprise indoor set and off-premises station, be provided with the air suction sensor that the suction temperature to compressor detects in described off-premises station, the tracheae that connects the online pipe of indoor set and off-premises station is provided with the tracheae sensor that is used for measuring the tracheae temperature; In addition, in described indoor set, be provided with main control module, receive the detected value of the gentle tube sensor output of described air suction sensor, when air suction sensor breaks down under refrigeration mode, described main control module is revised the detected value of the tracheae sensor that reads, and participate in control with the detected value that correction result substitutes described air suction sensor and calculate, thereby keep the air-conditioner can continuous service.
Further, for multi-split air conditioner, when described air suction sensor breaks down under refrigeration mode, main control module is asked average calculating operation to the detected value of the tracheae sensor of all start indoor set correspondences of reading, after averaging of income value and the correction value Δ t addition, substitution value as the air suction sensor detected value participates in the control computing, to improve the accuracy of control.
Further again, in described air-conditioner, also be provided with analog-digital converter, receive the analog signal of the gentle tube sensor output of described air suction sensor, and be converted into it corresponding temperature data, transfer to described main control module as the detected value of the gentle tube sensor of described air suction sensor.
Certainly, for the main control module that is built-in with AD conversion unit, can directly receive the analog signal of the gentle tube sensor output of described air suction sensor by described main control module, utilize described AD conversion unit that described analog signal conversion is corresponding with it temperature data, participate in this detected value in the control calculating of primary control program as the gentle tube sensor of described air suction sensor.
Further again, described correction value Δ t is value in 0 ℃～5 ℃ scopes preferably.
Further, when described main control module is zero or infinitely great at the detected value that detects air suction sensor output, judge that described air suction sensor breaks down.
Compared with prior art; advantage of the present invention and good effect are: disclosed air-conditioner is when air suction sensor breaks down; main control module is when externally reporting an error; can utilize the data of tracheae sensor measurement participating in control calculating through revising the measured value that replaced air suction sensor afterwards temporarily; thereby make unit in the wait maintenance that reports an error; can not shut down and continue operation; and then avoided disorderly closedown to the inconvenience that the user brings, improved the comfortableness that product uses.
After reading the detailed description of embodiment of the present invention in conjunction with the accompanying drawings, other characteristics of the present invention and advantage will become clearer.
Description of drawings
Fig. 1 is the installation site schematic diagram of each temperature sensor in the multi-split air conditioner;
Fig. 2 is the program flow diagram that air suction sensor proposed by the invention substitutes a kind of embodiment of control method.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is done explanation in further detail.
The present invention is in order to make air-conditioner when a certain sensor breaks down, and complete machine can run without interruption, and has proposed a kind of alternative control method of fault sensor.Specifically, be a kind of air suction sensor that in air-conditioner outdoor unit, is used to measure the compressor air suction temperature when breaking down, adopt the measured value of tracheae sensor to carry out the control method that temporarily substitutes.
Present air-conditioner refrigerating system is mainly by four most of compositions: evaporimeter, condenser, compressor and throttling arrangement.And drag many air-conditionings to one, and indoor set then is a plurality of, and indoor set connects with off-premises station by online pipe independently respectively, and off-premises station then all is provided with independently throttling arrangement at each indoor set.In process of refrigerastion, the indoor set radiator is an evaporimeter, and the off-premises station radiator is a condenser.Cold-producing medium absorbs heat of vaporization in evaporimeter, indoor set just can freeze by the interior heat of absorption chamber.Each indoor set is delivered to off-premises station to refrigerant superheat steam by the tracheae of online pipe, after gathering, enters compressor by the compressor air suction mouth and compresses, and becomes high temperature and high pressure gas, enters condenser again and carries out condensation.In this process, cold-producing medium is emitted heat, becomes liquid by gas, and off-premises station then is discharged into heat in the outdoor environment by fan.Pass through the throttling arrangement that liquid distributing device is sent to each indoor set correspondence through condensed cold-producing medium subcooled liquid, after the throttling arrangement step-down, the liquid pipe of the online pipe of process is delivered to and is evaporated heat absorption in each indoor set again, thereby finishes a complete kind of refrigeration cycle.During heating operation, the indoor set radiator is a condenser, and the off-premises station radiator is an evaporimeter.Cold-producing medium enters compressor after off-premises station absorbs heat, be compressed to the gas of HTHP, and the tracheae by online pipe enters each indoor set radiator and carries out condensation respectively, discharges heat in this process, and indoor set just can heat.Become liquid after the cold-producing medium heat release condensation, deliver to off-premises station,, gather the outer radiator of inlet chamber and evaporate again, absorb heat, and then finish the whole circulation that heats through after its corresponding throttling arrangement step-down by the liquid pipe of online pipe.
Fig. 1 is a kind of structural representation of multi-split air conditioner, and dragging four air-conditioners with one is example.Wherein, A is the indoor set part, comprises four indoor sets, all includes a radiator in each indoor set, as the A1 among Fig. 1, A2, A3, A4.On each radiator, be provided with a coil pipe sensor,, be used for detecting the evaporating temperature of radiator as the P1 among Fig. 1, P2, P3, P4.Stain is represented the installation site of sensor among the figure, down together.Described radiator A1, A2, A3, A4 connect off-premises station by the tracheae A5 of one tunnel online pipe separately, after gathering the gaseous refrigerant of radiator output are sent to the air entry of compressor.On the tracheae A5 of described each online pipe in road, be provided with a tracheae sensor, as the Q1 among Fig. 1, Q2, Q3, Q4, to be used for detecting the tracheae temperature.B is an outdoor machine part, comprises a compressor B1 and a radiator B2.The air intake duct of described compressor B1 is provided with an air suction sensor X1, detects the suction temperature of compressor B1.High temperature high pressure liquid by radiator B2 output is after electric expansion valve F1, F2, F3, F4 throttling, and the liquid that becomes low-temp low-pressure is sent to respectively in four indoor sets by the liquid pipe A6 of four tunnel online pipes.In order to examine the liquid-measuring tube temperature, on described four road liquid pipe A6, be respectively arranged with a liquid tube sensor, as the Y1 among Fig. 1, Y2, Y3, Y4.
Because the position of tracheae sensor and air suction sensor is nearer, when the air-conditioner refrigerating operaton, the temperature value that is obtained is also more approaching.Therefore, when the air suction sensor fault, can substitute the measured value of described air suction sensor by adopting the method that the measured value of tracheae sensor is revised, the operation that is used for primary control program is calculated.And for multi-split air conditioner, in order to improve the degree of accuracy of control, when air suction sensor breaks down, can adopt on the basis that the detected value of the pairing tracheae sensor of all start indoor sets is averaged, add the method for a degree of superheat correction value, substitute the detected value of air suction sensor, and then participate in the control calculating of primary control program, continue operation to keep whole unit.
Be that example elaborates the specific implementation process that described air suction sensor substitutes control method below with the multi-split air conditioner.
Embodiment one, present embodiment has disclosed the alternative control method of a kind of multi-split air conditioner when air suction sensor breaks down, promptly when air suction sensor breaks down, at first, read the detected value of the pairing tracheae sensor of all indoor sets that are in open state, be designated as Ts1, Ts2......Tsn respectively; Wherein, n is the number of start indoor set; Then, detected value Ts1, Ts2......Tsn to described tracheae sensor average, on the basis of described mean value, add a correction value Δ t again, the gained result is as the detected value of air suction sensor, be designated as Tx, the substitution primary control program participates in control and calculates, thereby realizes the primary control program continuous service, make the complete machine unit when warning is waited to repair, can reach the purpose that continues operation, to be user-friendly to.
Because the detected value of the gentle tube sensor output of air suction sensor is generally analog signal, after the analog-digital converter reception by indoor set or off-premises station inside, convert corresponding with it data-signal (being temperature value) to and transfer to the computing that main control module participates in primary control program; Perhaps can be directly receive by the main control module of indoor set inside, through the built-in ADC cell translation of main control module be with the corresponding temperature data signal of this analog signal after, participate in control again and calculate.Therefore, the detected value Tx that is here proposed and Ts1, Ts2......Tsn specifically refer to the data-signal through the conversion generation, promptly concrete temperature value.For describe clear for the purpose of, be suction temperature to call Tx in the following text; Tsn is the tracheae temperature.When correction value Δ t normally moved according to air-conditioner, the difference of suction temperature and tracheae temperature was specifically determined.The results showed: when air-conditioner operated in refrigeration mode, described correction value Δ t is value in 0 ℃～5 ℃ scopes.
Certainly, described detected value Tx and Ts1, Ts2......Tsn also can refer to the pairing magnitude of voltage of analog signal of the gentle tube sensor output of air suction sensor.At this moment, when described correction value Δ t can normally move according to air-conditioner, the difference between the detected value of the gentle tube sensor of described air suction sensor (being voltage difference) was specifically determined.Then, with detected value Ts1, Ts2......Tsn and the following formula of process:
Tx＝(Ts1+Ts2+......+Tsn)/n+Δt
Revised parameter Tx is converted to corresponding with it temperature value by main control module, and the substitution primary control program participates in calculating.
Fig. 2 substitutes a kind of program flow diagram of control method for air suction sensor.Wherein, detected value Tx represents suction temperature; Tsn represents n the pairing tracheae temperature of start indoor set, and Δ t specifically may further comprise the steps for revising temperature value:
S201, give variable Δ t with the correction value assignment of determining;
Here, described correction value is just determined input by the technical staff in the air-conditioner debug phase, prior write memory, and assignment is given variable Δ t when primary control program moves, and such as 1,2,3 or 4 equivalences, specifically determines according to the actual conditions of air-conditioner;
S202, detection are in the number of the indoor set of open state, and assignment is given variable n;
S203, read all start indoor sets pairing tracheae temperature, and assignment is given variable Ts1, Ts2......Tsn respectively;
S204, read suction temperature Tx;
S205, judge whether air suction sensor breaks down; If break down, then output alarm signal, and execution subsequent step; Otherwise, jump to step S208;
Here, can adopt the detected value size that detects air suction sensor output to realize for the judgement whether air suction sensor breaks down, promptly when the detected value of air suction sensor output be zero or when infinitely great when opening circuit (air suction sensor short circuit or), think that described air suction sensor breaks down;
S206, the current operational mode of judgement air-conditioner are if operate in refrigeration mode, then execution in step S207; Otherwise, execution in step S208;
S207, with tracheae temperature T s1, Ts2......Tsn and correction variable Δ t substitution formula:
Tx＝(Ts1+Ts2+......+Tsn)/n+Δt，
Calculate suction temperature Tx;
Thus, obtained suction temperature Tx and tracheae temperature T s1, the Ts2......Tsn of compressor, called, calculated, kept the air-conditioner continuous service to participate in control for primary control program;
S208, EP (end of program).
Said procedure can be used as a subprogram and writes main control module, calls for primary control program.
Should be noted that: above-mentioned alternative control method is only applicable to refrigeration mode, when air-conditioner operates in heating mode, should adopt other control methods to substitute.
Certainly; above-mentioned explanation is not to be limitation of the present invention; the present invention also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present invention also should belong to protection scope of the present invention.
Claims (10)
1. the alternative control method of fault air suction sensor under the air conditioner refrigerating pattern, described air suction sensor is used for measuring the suction temperature of compressor in the off-premises station; It is characterized in that: when described air suction sensor breaks down, the detected value of the tracheae sensor on the tracheae that is arranged on the online pipe of indoor and outdoor is revised the detected value that substitutes described air suction sensor afterwards participate in control calculating, thereby keep the air-conditioner continuous service.
2. the alternative control method of fault air suction sensor under the air conditioner refrigerating pattern according to claim 1, it is characterized in that: described air-conditioner is a multi-split air conditioner, when described air suction sensor breaks down, read the detected value of the pairing tracheae sensor of tracheae of the online pipe of all start indoor sets, and to after the described detected value averaged with correction value Δ t addition, the gained result is promptly as the substitution value of air suction sensor detected value.
3. the alternative control method of fault air suction sensor under the air conditioner refrigerating pattern according to claim 2 is characterized in that: the detected value of described tracheae sensor is the temperature value in this moment of tracheae; Described correction value Δ t is value in 0 ℃～5 ℃ scopes.
4. according to the alternative control method of fault air suction sensor under claim 1 or the 2 or 3 described air conditioner refrigerating patterns, it is characterized in that: described air-conditioner receives the detected value of the gentle tube sensor output of described air suction sensor by its inner main control module, when the detected value of the air suction sensor that receives is zero or when infinitely great, think that described air suction sensor breaks down.
5. air-conditioner, comprise indoor set and off-premises station, be provided with the air suction sensor that the suction temperature to compressor detects in described off-premises station, the tracheae that connects the online pipe of indoor set and off-premises station is provided with the tracheae sensor that is used for measuring the tracheae temperature; It is characterized in that: in described indoor set, be provided with main control module, receive the detected value of the gentle tube sensor output of described air suction sensor, when air suction sensor breaks down under refrigeration mode, described main control module is revised the detected value of the tracheae sensor that reads, and participate in control with the detected value that correction result substitutes described air suction sensor and calculate, thereby keep the air-conditioner continuous service.
6. air-conditioner according to claim 5, it is characterized in that: described air-conditioner is a multi-split air conditioner, when described air suction sensor breaks down under refrigeration mode, main control module is asked average calculating operation to the detected value of the tracheae sensor of all start indoor set correspondences of reading, after averaging of income value and the correction value Δ t addition, as the substitution value participation control computing of air suction sensor detected value.
7. according to claim 5 or 6 described air-conditioners, it is characterized in that: in described air-conditioner, be provided with an analog-digital converter, receive the analog signal of the gentle tube sensor output of described air suction sensor, and be converted into it corresponding temperature data, transfer to described main control module as the detected value of the gentle tube sensor of described air suction sensor.
8. according to claim 5 or 6 described air-conditioners, it is characterized in that: in described main control module, be built-in with AD conversion unit, receive the analog signal of the gentle tube sensor output of described air suction sensor, and be converted into corresponding with it temperature data, participate in the control calculating of primary control program as the detected value of the gentle tube sensor of described air suction sensor.
9. air-conditioner according to claim 6 is characterized in that: the detected value of described tracheae sensor is the temperature value in this moment of tracheae; Described correction value Δ t is value in 0 ℃～5 ℃ scopes.
10. according to claim 5 or 6 or 9 described air-conditioners, it is characterized in that: when described main control module is zero or infinitely great at the detected value that detects air suction sensor output, judge that described air suction sensor breaks down.
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Effective date of registration: 20190326 Address after: 528303 No. 8, Rong Gang Road, Ronggui, Shunde District, Foshan, Guangdong Patentee after: Guangdong Kelong Jiake Electronics Co., Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Qingdao, Shandong Province, No. 151 Patentee before: Hisense (Shandong) Air-conditioning Co., Ltd. |