CN101504179A - Substitution control method for air conditioner fault sensor - Google Patents
Substitution control method for air conditioner fault sensor Download PDFInfo
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- CN101504179A CN101504179A CNA2009100196092A CN200910019609A CN101504179A CN 101504179 A CN101504179 A CN 101504179A CN A2009100196092 A CNA2009100196092 A CN A2009100196092A CN 200910019609 A CN200910019609 A CN 200910019609A CN 101504179 A CN101504179 A CN 101504179A
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Abstract
The invention discloses a substitution and control method for a fault sensor in an air conditioner, which is suitable for a coil pipe sensor and a gas pipe sensor for respectively detecting the coil pipe temperature of a radiator of an indoor unit and the gas pipe temperature of an indoor-outdoor union pipe in the indoor unit of the air conditioner. When the gas pipe sensor has fault, the detecting value of the coil pipe sensor substitutes the detecting value of the gas pipe sensor by a correcting method, and participates in the control and calculation of a main control program; and when the coil pipe sensor has fault, the detecting value of the gas pipe sensor substitutes the detecting value of the coil pipe sensor by the correcting method, and participates in the control and calculation of the main control program, thereby ensuring that the unit can continuously run 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.
Description
Technical field
The invention belongs to air-conditioning and Refrigeration Engineering technical field, specifically, relate to adopt when a kind of certain sensor in air-conditioner breaks down a kind of alternative to guarantee that air-conditioner can not shut down a kind of alternative control method of operation.
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.Particularly, tend to because an indoor set sensor breaks down, and cause whole unit out of service, thereby bring great inconvenience for user's use for an one driven multiple air conditioner group.
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; a kind of alternative control method of air conditioner fault sensor has been proposed; when a certain sensor breaks down; main control module can utilize the data of other sensor measurements participating in control calculating through revising the measured value that replaced fault sensor afterwards temporarily, thereby guarantees that air-conditioner can continuous service.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of alternative control method of air conditioner fault sensor, in air conditioner room unit, be provided with radiator, described indoor set radiator is provided with the coil pipe sensor that is used for measuring the radiator coil temperature, and the tracheae of the online pipe of indoor and outdoor is provided with the tracheae sensor; When described tracheae sensor breaks down, with the detected value and the correction value addition detected value participation control computing of alternative described tracheae sensor afterwards of described coil pipe sensor, to keep the air-conditioner continuous service.
For multi-split air conditioner, when the tracheae sensor of the online pipe of a certain indoor set breaks down, after adopting the detected value and described correction value addition of radiator coil sensor of this indoor set, substitute the detected value of described tracheae sensor with the gained result, during the control that participates in primary control program is calculated.
Further, when described correction value was normally moved according to air-conditioner, the difference between the detected value of described tracheae sensor and coil pipe sensor was specifically determined.
In general, described correction value value in-3 ℃～3 ℃ scopes.
Further again, described air-conditioner receives the detected value of the gentle tube sensor of described coil pipe sensor output by its inner main control module, when the detected value of the tracheae sensor that receives is zero or when infinitely great, thinks that described tracheae sensor breaks down.
Technique scheme has been set forth a kind of alternative control mode when the tracheae sensor breaks down.In addition, the invention allows for a kind of alternative control method when the coil pipe sensor that is used to detect the indoor set radiator temperature breaks down, promptly when described coil pipe sensor breaks down, to be used to measure the detected value of tracheae sensor of tracheae temperature and the detected value that a correction value addition substituted described coil pipe sensor afterwards and participate in the control computing, to keep the air-conditioner continuous service.
For multi-split air conditioner, when the radiator coil sensor of a certain indoor set breaks down, after adopting the detected value and described correction value addition of tracheae sensor of online pipe of this indoor set, substitute the detected value of described coil pipe sensor with the gained result, during the control that participates in primary control program is calculated.
Further, when described correction value was normally moved according to air-conditioner, the difference between the detected value of the gentle tube sensor of described coil pipe sensor was specifically determined.
In general, described correction value value in-3 ℃～3 ℃ scopes usually.
Further, described air-conditioner receives the detected value of the gentle tube sensor of described coil pipe sensor output by its inner main control module, when the detected value of the coil pipe sensor that receives is zero or when infinitely great, thinks that described coil pipe sensor breaks down.
Compared with prior art; advantage of the present invention and good effect are: when disclosed air-conditioner breaks down at a certain sensor; main frame is when externally reporting an error; the data that can temporarily utilize other respective sensor to measure are being calculated through revising the measured value participation control that replaced fault sensor afterwards; thereby make unit in the wait maintenance that reports an error; can not shut down and continue operation; and then the inconvenience of having avoided disorderly closedown to bring to the user; improve the comfortableness that product uses, be particularly useful for present multi-split air conditioner unit.
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 the tracheae sensor substitutes a kind of embodiment of control method;
Fig. 3 is the program flow diagram that the coil pipe sensor 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 tracheae sensor that in air conditioner room unit, is used to measure the coil pipe sensor of radiator coil temperature or be used to measure the tracheae temperature of the online pipe of indoor and outdoor that is connected between indoor set and the off-premises station when breaking down, the alternative control method that can temporarily take.
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 managing A6 the night 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 air-conditioner is when refrigerating operaton, electric expansion valve adopts the degree of superheat to calculate, and promptly judges the temperature difference of tracheae temperature and liquid pipe temperature.During actual motion, because the coil temperature of radiator and tracheae temperature all are in the saturation region, the temperature basically identical in the indoor set.Therefore, when the tracheae sensor breaks down, can adopt the coil temperature of radiator in the indoor set to substitute temporarily.Consider the pressure drop of pipeline, coil temperature is added that a correction value can be more accurate.Vice versaad.
Based on above-mentioned principle, when the present invention breaks down at the tracheae sensor, the method that employing is revised the detected value of the coil pipe sensor that is used to measure radiator temperature in the indoor set substitutes the detected value of described tracheae sensor, calculate with the control that participates in primary control program, and then guarantee that air-conditioner can continuous service.Otherwise, when the coil pipe sensor breaks down, then adopt the method that the detected value of tracheae sensor is revised to substitute the detected value of described coil pipe sensor, the control that participates in primary control program is calculated, thereby reaches the purpose that keeps air-conditioner to run without interruption.
Elaborate the specific implementation process that described fault sensor substitutes control method below by two specific embodiments.
Embodiment one, and the alternative control method when present embodiment has disclosed a kind of air-conditioner tracheae sensor and breaks down promptly when the tracheae sensor breaks down, at first reads the detected value of the coil pipe sensor that is arranged on the indoor set radiator, is designated as Te; Then this detected value Te is revised, promptly add a correction value Δ t after, to replace the detected value of this tracheae sensor, be designated as Ts; And then with Ts, Te substitution primary control program participation control calculating, thereby realize the primary control program continuous service, make the complete machine unit when warning is waited to repair, can reach the purpose of not shutting down operation, to be user-friendly to.
Because the detected value of the gentle tube sensor output of coil pipe sensor is generally analog signal, after the analog-to-digital conversion module reception by indoor set inside, converts 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 off-premises station inside, through the built-in ADC of main control module be converted to the corresponding temperature data signal of this analog signal after, participate in control again and calculate.Therefore, detected value Ts, the Te that is here proposed specifically refers to the data-signal through the conversion generation, promptly concrete temperature value.For describe clear for the purpose of, be the tracheae temperature to call Ts in the following text; Te is a coil temperature.When correction value Δ t normally moved according to air-conditioner, the difference of the coil temperature of tracheae temperature and indoor set radiator was specifically determined.The results showed: when air-conditioner operated in refrigeration mode, described correction value Δ t is value in-3 ℃～3 ℃ scopes generally.
Certainly, described detected value Ts, Te also can refer to the pairing magnitude of voltage of analog signal of tracheae sensor and the output of coil pipe sensor.At this moment, when described correction value Δ t can normally move according to air-conditioner, the difference between the detected value of described tracheae sensor and coil pipe sensor (being voltage difference) was specifically determined.Then, be converted to corresponding with it temperature value with detected value Te and through the revised parameter Ts of formula Ts=Te+ Δ t by main control module, the substitution primary control program participates in calculating.
Fig. 2 substitutes a kind of program flow diagram of control method for the tracheae sensor.Wherein, detected value Ts, Te represent the coil temperature of tracheae temperature and indoor set radiator respectively, specifically may further comprise the steps:
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-2 ,-1,1 or 2 equivalences, specifically determines according to the actual conditions of air-conditioner;
S202, read tracheae temperature T s;
S203, read coil temperature Te;
S204, judge whether the tracheae sensor breaks down; If break down, then output alarm signal, and execution subsequent step; Otherwise, jump to step S207;
Here, can adopt the detected value size that detects the output of tracheae sensor to realize for the judgement whether the tracheae sensor breaks down, promptly when the detected value of tracheae sensor output be zero or when infinitely great when opening circuit (tracheae short circuit sensor or), think that described tracheae sensor breaks down;
S205, the current operational mode of judgement air-conditioner are if operate in refrigeration mode, then execution in step S206; Otherwise, jump to step S207;
S206, with coil temperature Te with revise variable Δ t substitution formula: Ts=Te+ Δ t calculates tracheae temperature T s.
Thus, obtained tracheae temperature T s and coil temperature Te, called, calculated, kept the air-conditioning continuous service to participate in control for primary control program.
S207, EP (end of program).
Said procedure can be used as a subprogram and writes main control module, calls for primary control program.
Embodiment two, alternative control method when present embodiment has disclosed a kind of coil pipe sensor on being arranged on the indoor set radiator and breaks down, promptly when the coil pipe sensor of indoor set radiator breaks down, read the detected value of the tracheae sensor that is arranged on the tracheae, be designated as Ts; Ts revises to this detected value, promptly add a correction value Δ t after, to replace the detected value of described coil pipe sensor, be designated as Te; And then with Ts, Te substitution primary control program participation control calculating, thereby realize the primary control program continuous service, the complete machine unit can be reached when warning is waited to repair do not shut down and continue to move purpose.
As embodiment one, detected value Ts, Te both can refer to the pairing actual temp value of analog signal of tracheae sensor and the output of coil pipe sensor, also can refer to the pairing magnitude of voltage of this analog signal.Present embodiment still represents that with Ts tracheae temperature, Te represent that coil temperature is that example is specifically addressed.When correction value Δ t normally moved according to air-conditioner, the difference of the coil temperature of indoor set radiator and the tracheae temperature on the tracheae was specifically determined.The results showed: when air-conditioner operated in refrigeration mode, described correction value Δ t is value in-3 ℃～3 ℃ scopes generally.If with voltage value representation detected value Ts, Te, when then correction value Δ t can normally move according to air-conditioner, the difference (being voltage difference) between the detected value of the gentle tube sensor of described coil pipe sensor was specifically determined.Then, be converted to corresponding with it temperature value with detected value Ts and through the revised parameter Te of formula Te=Ts+ Δ t by main control module, the substitution primary control program participates in calculating.
Fig. 3 is a kind of program flow diagram that indoor set radiator coil sensor substitutes control method, can be used as a subprogram and writes main control module, calls for main program.Wherein, detected value Ts, Te represent the coil temperature of tracheae temperature and indoor set radiator respectively, specifically may further comprise the steps:
S301, 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 or 1,2 equivalences, specifically determines according to the actual conditions of air-conditioner;
S302, read tracheae temperature T s;
S303, read coil temperature Te;
S304, judge whether the coil pipe sensor breaks down; If break down, then output alarm signal, and execution subsequent step; Otherwise, jump to step S307;
Here, can adopt the detected value size that detects the output of coil pipe sensor to realize for the judgement whether the coil pipe sensor breaks down, promptly when the detected value of coil pipe sensor output be zero or when infinitely great when opening circuit (coil pipe short circuit sensor or), think that described coil pipe sensor breaks down;
S305, the current operational mode of judgement air-conditioner are if operate in refrigeration mode, then execution in step S306; Otherwise, jump to step S307;
S306, with tracheae temperature T s with revise variable Δ t substitution formula: Te=Ts+ Δ t calculates coil temperature Te.
Thus, obtained tracheae temperature T s and coil temperature Te, called, calculated, kept the air-conditioning continuous service to participate in control for primary control program.
S307, EP (end of 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.
For multi-split air conditioner, when the tracheae sensor of the online pipe of a certain indoor set breaks down, after should adopting the detected value and correction value Δ t (Δ t is value in-3 ℃～3 ℃ scopes) addition of the pairing coil pipe sensor of this indoor set radiator, substitute the detected value of described tracheae sensor.And the coil pipe sensor of a certain indoor set radiator is when breaking down, after should adopting the detected value and correction value Δ t (Δ t is value in-3 ℃～3 ℃ scopes) addition of tracheae sensor of the pairing online pipe of this indoor set, substitute the detected value of described coil pipe sensor, participate in the control calculating of primary control program.
Disclosed fault sensor substitutes control method and is not only applicable to common one-to-one air-conditioning product or multi-split air conditioner unit, and is suitable for equally for the multi-joint unit of free multi-type (VRV).
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, a kind of alternative control method of air conditioner fault sensor, in air conditioner room unit, be provided with radiator, described indoor set radiator is provided with the coil pipe sensor that is used for measuring the radiator coil temperature, and the tracheae of the online pipe of indoor and outdoor is provided with the tracheae sensor; It is characterized in that: when described tracheae sensor breaks down, with the detected value and the correction value addition detected value participation control computing of alternative described tracheae sensor afterwards of described coil pipe sensor, to keep the air-conditioner continuous service.
2, the alternative control method of air conditioner fault sensor according to claim 1, it is characterized in that: described air-conditioner is a multi-split air conditioner, when the tracheae sensor of the online pipe of a certain indoor set breaks down, after adopting the detected value and described correction value addition of radiator coil sensor of this indoor set, substitute the detected value of described tracheae sensor with the gained result.
3, the alternative control method of air conditioner fault sensor according to claim 1 and 2 is characterized in that: when described correction value was normally moved according to air-conditioner, the difference between the detected value of described tracheae sensor and coil pipe sensor was determined.
4, the alternative control method of air conditioner fault sensor according to claim 1 and 2 is characterized in that: described correction value is value in-3 ℃～3 ℃ scopes.
5, the alternative control method of air conditioner fault sensor according to claim 1 and 2, it is characterized in that: described air-conditioner receives the detected value of the gentle tube sensor output of described coil pipe sensor by its inner main control module, when the detected value of the tracheae sensor that receives is zero or when infinitely great, think that described tracheae sensor breaks down.
6, a kind of alternative control method of air conditioner fault sensor, in air conditioner room unit, be provided with radiator, described indoor set radiator is provided with the coil pipe sensor that is used for measuring the radiator coil temperature, and the tracheae of the online pipe of indoor and outdoor is provided with the tracheae sensor; It is characterized in that: when described coil pipe sensor breaks down, with the detected value and the correction value addition detected value participation control computing of alternative described coil pipe sensor afterwards of described tracheae sensor, to keep the air-conditioner continuous service.
7, the alternative control method of air conditioner fault sensor according to claim 6, it is characterized in that: described air-conditioner is a multi-split air conditioner, when the radiator coil sensor of a certain indoor set breaks down, after adopting the detected value and described correction value addition of tracheae sensor of online pipe of this indoor set, substitute the detected value of described coil pipe sensor with the gained result.
8, according to the alternative control method of claim 6 or 7 described air conditioner fault sensors, it is characterized in that: when described correction value was normally moved according to air-conditioner, the difference between the detected value of the gentle tube sensor of described coil pipe sensor was determined.
9, according to the alternative control method of claim 6 or 7 described air conditioner fault sensors, it is characterized in that: described correction value is value in-3 ℃～3 ℃ scopes.
10, according to the alternative control method of claim 6 or 7 described air conditioner fault sensors, it is characterized in that: described air-conditioner receives the detected value of the gentle tube sensor output of described coil pipe sensor by its inner main control module, when the detected value of the coil pipe sensor that receives is zero or when infinitely great, think that described coil pipe sensor breaks down.
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| CN112066515A (en) * | 2019-06-11 | 2020-12-11 | 青岛海尔空调电子有限公司 | Control method for air conditioning system, air conditioning control system and air conditioning system |
| CN112066515B (en) * | 2019-06-11 | 2021-11-02 | 青岛海尔空调电子有限公司 | Control method for air conditioning system, air conditioning control system and air conditioning system |
| CN113566379A (en) * | 2020-04-29 | 2021-10-29 | 青岛海尔空调电子有限公司 | Control method, system and device after indoor unit ambient temperature sensor failure |
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