CN111121228A - Judgment method and judgment device for starting anti-condensation mode and air conditioner - Google Patents

Judgment method and judgment device for starting anti-condensation mode and air conditioner Download PDF

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CN111121228A
CN111121228A CN201911315391.5A CN201911315391A CN111121228A CN 111121228 A CN111121228 A CN 111121228A CN 201911315391 A CN201911315391 A CN 201911315391A CN 111121228 A CN111121228 A CN 111121228A
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temperature
shunt
evaporation
target
difference
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张新玉
赖东锋
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a judging method and a judging device for starting an anti-condensation mode and an air conditioner, wherein the judging method comprises the following steps: the temperature T of at least two branches of an evaporator is obtained at intervals of a time period T when the air conditioner is started and operatedNCalculating the acquired shunt temperature difference delta T of each shunt circuit, wherein the shunt temperature difference delta T is the absolute value of the temperature difference of different shunt circuits at the same moment; obtaining the temperature difference delta T of the M groups of branches after M time periods TMCalculating a temperature difference deviation value delta T' between the temperature differences of the M component paths; if the temperature difference deviation value delta T 'meets a preset condition, the temperature difference deviation value delta T' is judged to be equal to the preset value delta TStarting an anti-condensation mode of the air conditioner; the phenomenon that the fin type heat exchanger is subjected to condensation caused by uneven liquid distribution in the operation process of the air conditioning unit can be effectively avoided, and the accuracy rate of condensation prevention and the operation efficiency of the air conditioning unit are improved.

Description

Judgment method and judgment device for starting anti-condensation mode and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a judgment method and a judgment device for starting an anti-condensation mode and an air conditioner.
Background
In the air conditioner use, evaporimeter condensation problem can cause the puzzlement for the user, and has the potential safety hazard, and the refrigeration operation in-process can lead to the evaporimeter to appear the condensation because of dividing the liquid inequality, and among the prior art, judges the time that gets into and prevent the condensation through judging outdoor ambient temperature, indoor ambient temperature to reduce the possibility that the condensation produced. However, in the prior art, the control of condensation prevention is not considered in terms of condensation generation due to uneven liquid distribution of the evaporator.
Disclosure of Invention
The invention solves the technical problem of how to perform anti-condensation control on the aspect of condensation caused by uneven liquid distribution of an evaporator.
In order to solve the above technical problem, the present invention provides a method for determining whether to start a condensation prevention mode, including: the temperature T of at least two branches of an evaporator is obtained at intervals of a time period T when the air conditioner is started and operatedNCalculating the acquired shunt temperature difference delta T of each shunt circuit, wherein the shunt temperature difference delta T is the absolute value of the temperature difference of different shunt circuits at the same moment; calculating the temperature difference delta T of the M groups of branches after M time periods TMCalculating a temperature difference deviation value delta T 'between the temperature differences of the M branches, wherein the temperature difference deviation value delta T' is a branch target temperature TTargetAnd shunt actual temperature TPractice ofThe absolute value of the difference, i.e. Δ T ═ TTarget-TPractice ofL, |; and if the temperature difference deviation value delta T 'meets a preset condition, and the preset condition is that the temperature difference deviation value delta T' is greater than a first preset threshold value A, starting the anti-condensation mode of the air conditioner.
The difference in temperature is big along separate routes, and it is inhomogeneous to explain each way refrigerant reposition of redundant personnel of evaporimeter, and then the heat transfer is inhomogeneous, leads to cold and hot air to mix in the wind channel and separate out the condensate water, consequently judges whether to get into according to the change data of the difference in temperature along separate routes and prevent the condensation, can avoid air conditioning unit can lead to the phenomenon of condensation to appear in the fin type heat exchanger because divide liquid inequality at the operation in-process effectively, has promoted the rate of accuracy of preventing the condensation and air conditioning unit's operating efficiency simultaneously.
Further, if the number of branches is more than two, the branch temperature difference Δ T is the maximum value of the absolute values of the difference between the temperatures of any two branches at the same time.
Further, if the number of branches is more than two, the branch temperature difference Δ T is an absolute value of a difference between the highest branch temperature and the lowest branch temperature at the same time.
The calculation methods of the shunt temperature difference are two, the difference value can be subtracted firstly and then compared, the shunt temperature can be compared firstly, then the highest temperature and the lowest temperature are subtracted, and the calculation results of the two are consistent.
Further, the shunt actual temperature TPractice ofThe mean value of the shunt differences for successive groups M, i.e. TPractice of＝(ΔT1+ΔT2+ΔT3+……+ΔTM)/M。
Further, the shunt target temperature TTargetTo the evaporation temperature TEvaporation ofAnd the temperature T of the evaporator coilCoil pipeThe absolute value of the difference, i.e. TTarget＝|TEvaporation of-TCoil pipeL, |; or, the shunt target temperature TTargetTo the evaporation temperature TEvaporation ofAnd the return air temperature T of the compressorReturn airThe absolute value of the difference, i.e. TTarget＝|TEvaporation of-TReturn air|。
Further, the evaporation temperature TEvaporation ofThe evaporation pressure P being the position of the evaporator outletEvaporation ofThe corresponding temperature.
Further, the return air temperature TReturn airTemperature T of coil pipeCoil pipeIf the difference is less than or equal to the first temperature threshold, the shunt target temperature value TTargetTo the evaporation temperature TEvaporation ofAnd the return air temperature T of the compressorReturn airThe absolute value of the difference, i.e. TTarget＝|TEvaporation of-TReturn airL, |; temperature T of return airReturn airTemperature T of coil pipeCoil pipeIf the difference is greater than the first temperature threshold, the shunt target temperature TTargetTo evaporateTemperature TEvaporation ofTemperature T of coil pipeCoil pipeThe absolute value of the difference, i.e. TTarget＝|TEvaporation of-TCoil pipe|。
Further, when the air conditioner is configured with a dual-coil evaporator, the coil temperature TCoil pipeThe temperature value of the coil pipe with lower temperature in the double coil pipes is obtained; when the air conditioner is equipped with a single-coil evaporator, the temperature T of the coilCoil pipeThe temperature value of a single coil.
Further, the preset conditions further include: the accumulated refrigerating time H of the air conditioner during the starting operation is more than or equal to the preset minimum time Hmin。
Because the measurement and calculation of the refrigerating time is added, whether the condition of entering the anti-condensation mode is met or not can be judged more accurately, and misjudgment is prevented.
The invention also provides a device for judging whether the anti-condensation mode is started, which comprises: the detection unit is used for detecting the temperature of at least two branches of the evaporator, the temperature of an evaporator coil, the evaporation pressure at the outlet position of the evaporator and the return air temperature of the compressor;
the calculation unit is used for acquiring the evaporation temperature according to the evaporation pressure; the calculation unit is also used for calculating the shunt temperature difference according to the shunt temperature of the evaporator; calculating actual shunt circuit temperature according to the plurality of shunt circuit temperature differences; the calculation unit is also used for calculating a branch target temperature according to the evaporation temperature and the temperature of the evaporator coil, or calculating the branch target temperature according to the evaporation temperature and the return air temperature of the compressor; the calculating unit is also used for calculating a temperature difference deviation value according to the shunt actual temperature and the shunt target temperature;
and the control unit is used for controlling the air conditioner to start an anti-condensation mode according to the temperature difference deviation value.
The present invention also provides an air conditioner characterized by comprising the device for judging whether to start the anti-condensation mode according to the above claims.
Further, the detection unit comprises a temperature sensor and a pressure sensor, wherein the temperature sensor is arranged in at least two branches of the evaporator; the pressure sensor is arranged at the outlet of the evaporator.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for determining whether to start an anti-condensation mode in embodiment 1;
fig. 2 is a flowchart illustrating a method for determining whether to start an anti-condensation mode in embodiment 2.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The method for determining whether to start the anti-condensation mode is shown in fig. 1.
The evaporator of air conditioner includes the first branch, the second branch, the third branch, … … the Nth branch, the temperature of the branch is measured by the temperature sensor, the temperature of the branch will change with time, the temperature T of the first branch1Second shunt temperature T2Third shunt temperature T3… … Nth branch temperature TN。
A method for judging whether an anti-condensation mode is started comprises the following steps:
the temperature T of at least two branches of an evaporator is obtained at intervals of a time period T when the air conditioner is started and operatedNAnd calculating the obtained branch temperature difference delta T of each branch, wherein the obtained branch temperature difference delta T is the absolute value of the difference between the temperatures of different branches at the same moment, namely delta T is | TN′-TN|；
When passing M timesThe interval period T is obtained, and the temperature difference delta T of the M component paths is obtainedMCalculating a temperature difference deviation value delta T 'between the temperature differences of the M branches, wherein the temperature difference deviation value delta T' is a branch target temperature TTargetAnd shunt actual temperature TPractice ofThe absolute value of the difference, i.e. Δ T ═ TTarget-TPractice of|；
If the temperature difference deviation value delta T' meets a preset condition, the preset condition is as follows: and if the temperature difference deviation value delta T' is greater than a first preset threshold value A, the air conditioner starts the anti-condensation mode.
The difference in temperature is big along separate routes, and it is inhomogeneous to explain each way refrigerant reposition of redundant personnel of evaporimeter, and then the heat transfer is inhomogeneous, leads to cold and hot air to mix in the wind channel and separate out the condensate water, consequently judges whether to get into according to the change data of the difference in temperature along separate routes and prevent the condensation, can avoid air conditioning unit can lead to the phenomenon of condensation to appear in the fin type heat exchanger because divide liquid inequality at the operation in-process effectively, has promoted the rate of accuracy of preventing the condensation and air conditioning unit's operating efficiency simultaneously.
If the number of branches is more than two, the branch temperature difference delta T has two calculation modes:
(1) the branch temperature difference delta T is the maximum value of the absolute values of the temperature difference between any two branches at the same time.
(2) The shunt temperature difference delta T is the absolute value of the difference between the highest shunt temperature and the lowest shunt temperature at the same moment.
The difference is subtracted and then compared in the calculation mode (1), the shunt temperature is compared in the calculation mode (2), and then the highest temperature and the lowest temperature are subtracted, so that the calculation results of the two are consistent.
Shunt actual temperature TPractice ofThe mean value of the shunt differences for successive groups M, i.e. TPractice of＝(ΔT1+ΔT2+ΔT3+……+ΔTM) Preferably, M is three.
Shunt target temperature TTargetTo the evaporation temperature TEvaporation ofAnd the temperature T of the evaporator coilCoil pipeThe absolute value of the difference, i.e. TTarget＝|TEvaporation of-TCoil pipe|；
Or, shunt the target temperature TTargetTo the evaporation temperature TEvaporation ofAnd the return air temperature T of the compressorReturn airThe absolute value of the difference, i.e. TTarget＝|TEvaporation of-TReturn air|；
A pressure sensor is arranged at the outlet of the evaporator to measure the evaporation pressure PEvaporation ofThen the corresponding temperature value is checked through a pressure-enthalpy diagram, namely the evaporation temperature TEvaporation ofThe evaporation temperature thus obtained is more accurate.
Shunt target temperature TTargetThe obtaining method comprises the following steps:
temperature T of return airReturn airTemperature T of coil pipeCoil pipeIf the difference is less than or equal to the first temperature threshold, the shunt target temperature value TTargetTo the evaporation temperature TEvaporation ofAnd the return air temperature T of the compressorReturn airThe absolute value of the difference, i.e. TTarget＝|TEvaporation of-TReturn air|；
Temperature T of return airReturn airTemperature T of coil pipeCoil pipeIf the difference is greater than the first temperature threshold, the shunt target temperature TTargetTo the evaporation temperature TEvaporation ofTemperature T of coil pipeCoil pipeThe absolute value of the difference, i.e. TTarget＝|TEvaporation of-TCoil pipe|。
Temperature T of coilCoil pipeThe obtaining method comprises the following steps:
when the air conditioner is equipped with the evaporator with double coils, the temperature T of the coilCoil pipeThe temperature value of the coil pipe with lower temperature in the double coil pipes is obtained;
when the air conditioner is equipped with a single-coil evaporator, the temperature T of the coilCoil pipeThe temperature value of a single coil.
And if the temperature difference deviation value delta T' meets a preset condition, starting the air conditioner in an anti-condensation mode.
If only the temperature of the two branches is measured, the judgment method for starting the anti-condensation mode is as follows:
first path temperature T1Second path temperature T2The shunt temperature difference Δ T ═ T1-T2|
The time period t is 15s, namely every 15 seconds, a group of shunt temperature differences are taken, and three groups are taken in total, as follows:
a first set of shunt temperature differences Δ T for a first time period T1＝|T1-T2|；
For a second time period 2T, a second set of shunt temperature differences Δ T2＝|T1-T2|；
For a third time period of 3T, a third set of shunt temperature differences Δ T3＝|T1-T2|；
Actual shunt temperature TPractice of＝(ΔT1+ΔT2+ΔT3)/3；
Deviation value of temperature difference Δ T ═ TTarget-TPractice of|；
And when the temperature difference deviation value delta T' is larger than a first preset threshold value A, the air conditioner starts the anti-condensation mode.
In order to more intuitively explain the method for determining the anti-condensation mode, this embodiment provides an example of 3 branches:
Figure BDA0002324516490000061
the calculation mode of the shunt temperature difference delta T is as follows: the branch temperature difference Δ T is the maximum value of the absolute values of the difference between the temperatures of any two branches at the same time.
Shunt temperature difference at 5 min: delta TA＝MAX(|12-14|、|12-10|、|14-10|)＝4℃；
Shunt temperature difference at 10 min: delta TA＝MAX(|15-15|、|15-11|、|15-11|)＝4℃；
Shunt temperature difference at 15 min: delta TA＝MAX(|14-12|、|14-9|、|12-9|)＝5℃；
Shunt actual temperature TPractice ofThe mean value of the shunt temperature differences for successive 3 groups, i.e. TPractice of＝(ΔT1+ΔT2+ΔT3)/3＝(4+4+5)/3＝4.3℃。
Assuming a shunt target temperature TTargetIs 2 ℃.
The temperature difference deviation value delta T' between the shunt temperature differences of 3 continuous groups is 4.3-2-2.3 ℃;
the first preset threshold A is 1 ℃, the temperature change value delta T' between the shunt temperature differences of 3 continuous groups is 2.3 ℃ and is larger than the first preset threshold A, and the air conditioner starts the condensation preventing mode.
Example 2
Fig. 2 shows a method for determining whether to start the anti-condensation mode according to this embodiment.
Specifically, the method for determining whether to start the anti-condensation mode provided in this embodiment basically adopts the same steps as those in embodiment 1.
The difference lies in that: the preset conditions of this embodiment are: the temperature difference deviation value delta T' is greater than a first preset threshold value A, and the refrigerating time length H is greater than or equal to a preset minimum time length Hmin。
Specifically, when the air conditioner is started to operate, a refrigeration mode is started and the refrigeration duration H of the refrigeration mode is accumulated; the temperature difference deviation value delta T' is greater than a first preset threshold value A, and the refrigerating time length H is greater than or equal to a preset minimum time length HminIn time, the air conditioner starts the anti-condensation mode.
Compared with the embodiment 1, the technical effect of the embodiment 2 is better, and the measurement and calculation of the refrigerating time is added, so that whether the condition of entering the anti-condensation mode is met or not can be judged more accurately, and the misjudgment is prevented.
Example 3
A judgment device for turning on an anti-condensation mode, comprising:
the detection unit is used for detecting the temperature of at least two branches of the evaporator, the temperature of an evaporator coil, the evaporation pressure at the outlet position of the evaporator and the return air temperature of the compressor;
the calculation unit is used for acquiring the evaporation temperature according to the evaporation pressure;
the calculation unit is also used for calculating the shunt temperature difference according to the shunt temperature of the evaporator; calculating actual shunt circuit temperature according to the plurality of shunt circuit temperature differences;
calculating a branch target temperature according to the evaporation temperature and the temperature of the evaporator coil, or calculating the branch target temperature according to the evaporation temperature and the return air temperature of the compressor;
calculating a temperature difference deviation value according to the shunt actual temperature and the shunt target temperature;
and the control unit is used for controlling the air conditioner to start an anti-condensation mode according to the temperature difference deviation value.
Example 4
An air conditioner includes a judging device for starting a condensation prevention mode.
The detection unit comprises temperature sensors which are arranged in at least two branches of the evaporator.
The evaporator also comprises a pressure sensor arranged at the outlet of the evaporator.
The system comprises a compressor, a fan and a condenser, the first system and the second system respectively comprise a compressor, a fan and a condenser, the first system and the second system respectively detect and respectively judge preset conditions for preventing condensation, and when any system meets the preset conditions, any system starts a condensation prevention mode.
The two systems are not related, one system fails, and the other system can still continue to operate.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The judgment device for the open anti-condensation mode and the air conditioner disclosed in the embodiment correspond to the method of the judgment device for the open anti-condensation mode disclosed in the embodiment, so that the description is relatively simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. A method for judging whether an anti-condensation mode is started is characterized by comprising the following steps:
the temperature T of at least two branches of an evaporator is obtained at intervals of a time period T when the air conditioner is started and operatedNCalculating the acquired shunt temperature difference delta T of each shunt circuit, wherein the shunt temperature difference delta T is the absolute value of the temperature difference of different shunt circuits at the same moment;
obtaining the temperature difference delta T of the M groups of branches after M time periods TMCalculating a temperature difference deviation value delta T 'between the temperature differences of the M branches, wherein the temperature difference deviation value delta T' is a branch target temperature TTargetAnd shunt actual temperature TPractice ofThe absolute value of the difference, i.e. Δ T ═ TTarget-TPractice of|；
And if the temperature difference deviation value delta T 'meets a preset condition, and the preset condition is that the temperature difference deviation value delta T' is greater than a first preset threshold value A, starting the anti-condensation mode of the air conditioner.
2. The method for determining whether the anti-condensation mode is turned on according to claim 1, wherein if the number of the branches is more than two, the branch temperature difference Δ T is the maximum value among absolute values of the temperature differences between any two branches at the same time.
3. The method as claimed in claim 1, wherein if the number of branches is greater than two, the branch temperature difference Δ T is an absolute value of a difference between the highest branch temperature and the lowest branch temperature at the same time.
4. The method for determining whether to start the anti-condensation mode according to claim 1, wherein the actual shunt temperature T isPractice ofThe mean value of the shunt differences for successive groups M, i.e. TPractice of＝(ΔT1+ΔT2+ΔT3+……+ΔTM)/M。
5. The method for determining whether to start the anti-condensation mode according to claim 1, wherein the shunt target temperature T isTargetTo the evaporation temperature TEvaporation ofAnd the temperature T of the evaporator coilCoil pipeThe absolute value of the difference, i.e. TTarget＝|TEvaporation of-TCoil pipeL, |; or, the shunt target temperature TTargetTo the evaporation temperature TEvaporation ofAnd the return air temperature T of the compressorReturn airThe absolute value of the difference, i.e. TTarget＝|TEvaporation of-TReturn air|。
6. The method for determining whether the anti-condensation mode is turned on or off according to claim 5, wherein the return air temperature T is lower than the predetermined temperatureReturn airTemperature T of coil pipeCoil pipeIf the difference is less than or equal to the first temperature threshold, the shunt target temperature value TTargetTo the evaporation temperature TEvaporation ofAnd the return air temperature T of the compressorReturn airThe absolute value of the difference, i.e.
TTarget＝|TEvaporation of-TReturn airL, |; temperature T of return airReturn airTemperature T of coil pipeCoil pipeIf the difference is greater than the first temperature threshold, the shunt target temperature TTargetTo the evaporation temperature TEvaporation ofTemperature T of coil pipeCoil pipeThe absolute value of the difference, i.e.
TTarget＝|TEvaporation of-TCoil pipe|。
7. The method as claimed in claim 6, wherein when the air conditioner is equipped with a dual-coil evaporator, the coil temperature T is determinedCoil pipeThe temperature value of the coil pipe with lower temperature in the double coil pipes is obtained; when the air conditioner is equipped with a single-coil evaporator, the temperature T of the coilCoil pipeThe temperature value of a single coil.
8. The method for determining whether to start the anti-condensation mode according to claim 1, wherein the preset condition further comprises: and the accumulated refrigerating time H of the air conditioner during the starting operation is more than or equal to the preset minimum time Hmin。
9. A device for judging whether a condensation-preventing mode is opened is characterized by comprising:
the detection unit is used for detecting the temperature of at least two branches of the evaporator, the temperature of an evaporator coil, the evaporation pressure at the outlet position of the evaporator and the return air temperature of the compressor;
the calculation unit is used for acquiring the evaporation temperature according to the evaporation pressure;
the calculation unit is also used for calculating the shunt temperature difference according to the shunt temperature; calculating actual shunt circuit temperature according to the plurality of shunt circuit temperature differences;
the calculation unit is also used for calculating a branch target temperature according to the evaporation temperature and the temperature of the evaporator coil, or calculating the branch target temperature according to the evaporation temperature and the return air temperature of the compressor;
the calculating unit is also used for calculating a temperature difference deviation value according to the shunt actual temperature and the shunt target temperature;
and the control unit is used for controlling the air conditioner to start an anti-condensation mode according to the temperature difference deviation value.
10. An air conditioner characterized by comprising the judging means for turning on the anti-condensation mode of claim 9.
11. An air conditioner according to claim 10, wherein said detection unit includes a temperature sensor and a pressure sensor, said temperature sensor being disposed in a branch of the evaporator; the pressure sensor is arranged at the outlet of the evaporator.
CN201911315391.5A 2019-12-18 2019-12-18 Judgment method and judgment device for starting anti-condensation mode and air conditioner Pending CN111121228A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN112432333A (en) * 2020-12-04 2021-03-02 珠海格力电器股份有限公司 Control method and device of air conditioning system, storage medium and air conditioner
CN114183914A (en) * 2021-12-10 2022-03-15 珠海格力电器股份有限公司 Condensation removing method and device for air conditioner screen
CN114543310A (en) * 2022-01-29 2022-05-27 青岛海尔空调器有限总公司 Control method and control device for air conditioner, air conditioner and storage medium

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