CN111140990A - Filth blockage detection method for air conditioner heat exchanger and air conditioner - Google Patents
Filth blockage detection method for air conditioner heat exchanger and air conditioner Download PDFInfo
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- CN111140990A CN111140990A CN201911338123.5A CN201911338123A CN111140990A CN 111140990 A CN111140990 A CN 111140990A CN 201911338123 A CN201911338123 A CN 201911338123A CN 111140990 A CN111140990 A CN 111140990A
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- heat exchanger
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- dirty
- air conditioner
- blockage detection
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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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/39—Monitoring filter performance
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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
- F24F11/32—Responding to malfunctions or emergencies
-
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
Abstract
The invention relates to a filth blockage inspection method for an air conditioner heat exchanger, which comprises the steps of S1, obtaining the temperature of heat exchange fluid on two sides of the heat exchanger, calculating the difference value of the temperature and the heat exchange fluid, namely the actual temperature difference △ T1, S2, comparing the actual temperature difference △ T1 with the preset temperature difference △ T2 of the heat exchange fluid on the two sides of the heat exchanger under the operating environment condition, outputting the difference value between the actual temperature difference △ T1 and the preset temperature difference △ T2 as a temperature change value △ T, namely △ T- △ T1- △ T2, and S3, judging whether the temperature change value △ T meets a set temperature value M or not and outputting a corresponding prompt.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner heat exchanger filth blockage detection method and an air conditioner.
Background
Patent No. CN201910224028.6 discloses a method for detecting filth blockage in an air conditioner. The scheme obtains the rotating speed of a fan of the air conditioner indoor unit, the air pressure value outside an air inlet of the air conditioner indoor unit, the air pressure value on the inlet side of the heat exchanger and the air pressure value on the outlet side of the heat exchanger; calculating a real-time wind pressure difference value A and a real-time wind pressure difference value B corresponding to the rotating speed of the fan; and comparing the preset fan rotating speed-wind pressure difference standard value, and judging. However, the wind pressure is actually affected by the flow rate and the temperature, especially in the heat exchanger, the airflow can be cooled or heated (depending on the operation state of the air conditioner) after heat exchange, and the flow rate can be reduced, so that the wind pressure comparison and judgment are difficult to accurately control.
Disclosure of Invention
The invention aims to overcome the problems in the prior art, provides an air conditioner heat exchanger filth blockage detection method capable of improving detection precision, and also provides an air conditioner for realizing the air conditioner heat exchanger filth blockage detection method.
In order to achieve the purpose, the invention adopts the following scheme:
a filth blockage detection method for an air-conditioning heat exchanger is characterized in that temperature detection devices are arranged on two sides of the heat exchanger, and comprises the following steps:
s1, obtaining the temperature of heat exchange fluid on two sides of a heat exchanger, and calculating the difference value of the two temperatures, namely the actual temperature difference △ T1;
s2, comparing the actual temperature difference △ T1 with a preset temperature difference △ T2 of heat exchange fluid on two sides of the heat exchanger under the operating environment condition, and outputting a difference value between the actual temperature difference △ T1 and the preset temperature difference △ T2 as a temperature change value △ T, namely △ T is △ T1- △ T2;
and S3, judging whether the temperature change value △ T meets the set temperature value M or not, and outputting a corresponding prompt.
Further, in step S1, the temperature of the heat exchange fluid on both sides of the heat exchanger is obtained, and a difference between the two temperatures is calculated, that is, the actual temperature difference △ T1 specifically includes:
selecting a set dirty blockage detection mode of the heat exchanger, and operating the unit according to the dirty blockage detection mode of the heat exchanger;
in the dirty blockage detection mode of the heat exchanger, the unit automatically keeps the running of the compressor at a safe and stable running speed for a long time, and the running of the compressor, the running of the inner fan and the running of the outer fan are all fixed values;
and after the operation is carried out for T1 time, the temperature of the heat exchange fluid on the two sides of the heat exchanger is obtained, and the difference value of the two temperatures is calculated, namely the actual temperature difference △ T1.
Further, in step S3, the determining whether the temperature variation value △ T satisfies the set temperature value M, and outputting a corresponding prompt specifically includes:
judging whether the temperature change value △ T meets a set temperature value M or not;
if yes, the output heat exchanger is not dirty and blocked;
if not, the output heat exchanger is dirty and blocked.
Furthermore, after the output heat exchanger is not dirty and blocked, the unit exits from the dirty and blocked detection mode of the heat exchanger; after the heat exchanger is filthy and blocked, the display continuously outputs a prompt signal accompanied by a prompt tone.
Furthermore, the heat exchanger dirty-blockage detection mode comprises an internal machine evaporator dirty-blockage detection mode and an external machine condenser dirty-blockage detection mode.
Further, a set dirty blockage detection mode of the internal evaporator is selected, and the unit operates according to the dirty blockage detection mode of the internal evaporator;
in the refrigeration mode, if the temperature change value △ T is greater than M, dirty blockage of the inner machine evaporator is output, otherwise, dirty blockage is not generated;
when in the heating mode, if the temperature change value △ T is less than M, dirty blockage of the inner machine evaporator is output, otherwise, dirty blockage is not caused.
Further, a set dirty blockage detection mode of the outer machine condenser is selected, and the unit operates according to the dirty blockage detection mode of the outer machine condenser;
in the refrigeration mode, if the temperature change value △ T is less than M, the condenser of the output outdoor unit is dirty and blocked, otherwise, the condenser is not dirty and blocked;
and in the heating mode, if the temperature change value △ T is greater than M, the condenser of the output outdoor unit is dirty and blocked, otherwise, the condenser of the output outdoor unit is not dirty and blocked.
Further, the temperatures of the heat exchange fluids at the two sides of the heat exchanger are specifically the fluid temperature at the inlet of the heat exchanger and the fluid temperature at the outlet of the heat exchanger.
Further, the temperature detection device is a temperature sensor.
The invention also provides an air conditioner, which comprises a heat exchanger and temperature detection devices arranged at the inlet and the outlet of the heat exchanger, and is used for realizing the filth blockage detection method of the heat exchanger of the air conditioner.
Compared with the prior art, the invention has the following advantages:
according to the method for detecting the filth blockage of the air-conditioning heat exchanger, the temperature detection devices are arranged at the inlet and the outlet of the heat exchanger, the heat exchange fluid is subjected to continuous real-time temperature detection, the actual temperature difference △ T1 is obtained through algorithm operation, the actual temperature difference is compared with the preset temperature difference △ T2 in the program, the filth blockage condition of the heat exchanger is judged and a prompt is given, the detection precision is improved, and the method for detecting the filth blockage of the air-conditioning heat exchanger has the characteristics of accuracy, reliability and rapidness.
Drawings
The present application will be described in further detail with reference to the following drawings and detailed description.
Fig. 1 is a flowchart of a procedure of a filth blockage checking method of an air conditioner heat exchanger according to the present invention.
Detailed Description
The present application is further described in conjunction with the following examples.
Example 1:
referring to fig. 1, an air conditioner includes a heat exchanger, temperature detection devices disposed at an inlet and an outlet of the heat exchanger, a compressor, and a throttling device. The heat exchanger comprises an external machine condenser and an internal machine evaporator. The temperature detection device is a temperature sensor. All set up temperature-detecting device through import and the export at the heat exchanger, continuously carry out real-time temperature to the heat transfer fluid and detect, help judging the heat exchanger filth and block up the condition, improve the inspection precision, improve the overall reliability of air conditioner.
The invention also provides a filth blockage detection method of the air conditioner heat exchanger, which is realized by using the air conditioner, and the filth blockage detection method of the air conditioner heat exchanger comprises the following steps of:
s1, acquiring the temperature of heat exchange fluid on two sides of a heat exchanger, and calculating the difference between the two temperatures, namely the actual temperature difference △ T1. concretely, the step S1 specifically comprises the following steps:
the method comprises the steps of selecting a set heat exchanger 'dirty blockage detection' mode, operating a unit according to the heat exchanger 'dirty blockage detection' mode, automatically operating the unit at a rotating speed at which a compressor can maintain safe and stable operation for a long time in the heat exchanger 'dirty blockage detection' mode, operating the compressor at the rotating speed, the rotating speed of an inner fan and the rotating speed of an outer fan at fixed values, and after t1 time of operation, acquiring the temperature of heat exchange fluid on two sides of the heat exchanger, and calculating the difference value of the two values, namely the actual temperature difference △ T1.
S2, comparing the actual temperature difference △ T1 with a preset temperature difference △ T2 of heat exchange fluid on two sides of the heat exchanger under the operating environment condition, and outputting a difference value between the actual temperature difference △ T1 and the preset temperature difference △ T2 as a temperature change value △ T, namely △ T- △ T1- △ T2.
S3, judging whether the temperature change value △ T meets the set temperature value M or not, and outputting a corresponding prompt, wherein the step S3 specifically comprises the following steps:
judging whether the temperature change value △ T meets the set temperature value M, if so, outputting no dirty blockage to the heat exchanger, if not, outputting dirty blockage to the heat exchanger, and if not, continuously outputting a prompt signal accompanied by a prompt tone by the display.
The heat exchanger comprises an outer machine condenser and an inner machine evaporator, so that the 'dirty blockage detection' mode of the heat exchanger comprises a 'dirty blockage detection' mode of the inner machine evaporator and a 'dirty blockage detection' mode of the outer machine condenser, whether a temperature change value △ T meets a set temperature value M or not is judged in the 'dirty blockage detection' mode of the inner machine evaporator or the 'dirty blockage detection' mode of the outer machine condenser, the unit operates according to the 'dirty blockage detection' mode of the inner machine evaporator when the set 'dirty blockage detection' mode of the inner machine evaporator is selected, dirty blockage of the inner machine evaporator is output when the temperature change value △ T is larger than M in the refrigeration mode, otherwise, dirty blockage is not generated, dirty blockage of the inner machine evaporator is output when the temperature change value △ T is smaller than M in the heating mode, and dirty blockage is not generated otherwise.
If the set dirty blockage detection mode of the outer machine condenser is selected, the unit operates according to the dirty blockage detection mode of the outer machine condenser, if the temperature change value △ T is smaller than M in the refrigerating mode, dirty blockage of the outer machine condenser is output, otherwise, dirty blockage is not caused, if the temperature change value △ T is larger than M in the heating mode, dirty blockage of the outer machine condenser is output, and otherwise, dirty blockage is not caused.
Therefore, the following table is shown for the case where the indoor unit evaporator "dirty-up detection" mode and the outdoor unit condenser "dirty-up detection" mode are respectively used in the cooling mode and the heating mode:
according to the method for detecting the filth blockage of the air-conditioning heat exchanger, the temperature detection devices are arranged at the inlet and the outlet of the heat exchanger, the heat exchange fluid is subjected to real-time temperature detection continuously, the actual temperature difference △ T1 is obtained through algorithm operation, the actual temperature difference is compared with the preset temperature difference △ T2 in the program, the filth blockage condition of the heat exchanger is judged, the prompt is given, the detection precision is improved, and the method for detecting the filth blockage of the air-conditioning heat exchanger has the advantages of being accurate, reliable and rapid.
Example 2:
in this embodiment 2, the method for detecting the filth blockage of the heat exchanger of the air conditioner is basically the same as that in embodiment 1, but the difference is that the problem of filth blockage of the condenser of the external unit is more serious in consideration of the installation position and the operation environment of the condenser of the external unit, so that the fluid temperature at the inlet of the condenser of the external unit and the fluid temperature at the outlet of the condenser of the external unit are detected and then judged for many times, thereby avoiding frequent shutdown caused by judging that the heat exchanger is filth-blocked and having bad influence on the user experience,
finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the protection scope of the present application, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.
Claims (10)
1. The filth blockage detection method for the air-conditioning heat exchanger is characterized in that temperature detection devices are arranged on two sides of the heat exchanger, and comprises the following steps:
s1, obtaining the temperature of heat exchange fluid on two sides of a heat exchanger, and calculating the difference value of the two temperatures, namely the actual temperature difference △ T1;
s2, comparing the actual temperature difference △ T1 with a preset temperature difference △ T2 of heat exchange fluid on two sides of the heat exchanger under the operating environment condition, and outputting a difference value between the actual temperature difference △ T1 and the preset temperature difference △ T2 as a temperature change value △ T, namely △ T is △ T1- △ T2;
and S3, judging whether the temperature change value △ T meets the set temperature value M or not, and outputting a corresponding prompt.
2. The method for detecting filth blockage of an air conditioner heat exchanger according to claim 1, wherein in step S1, the temperature of the heat exchange fluid at two sides of the heat exchanger is obtained, and the difference between the two temperatures, namely the actual temperature difference △ T1, is specifically:
selecting a set dirty blockage detection mode of the heat exchanger, and operating the unit according to the dirty blockage detection mode of the heat exchanger;
in the dirty blockage detection mode of the heat exchanger, the unit automatically keeps the running of the compressor at a safe and stable running speed for a long time, and the running of the compressor, the running of the inner fan and the running of the outer fan are all fixed values;
and after the operation is carried out for T1 time, the temperature of the heat exchange fluid on the two sides of the heat exchanger is obtained, and the difference value of the two temperatures is calculated, namely the actual temperature difference △ T1.
3. The method for detecting filth blockage of an air conditioner heat exchanger according to claim 2, wherein in step S3, the step of determining whether the temperature variation value △ T meets the set temperature value M and outputting a corresponding prompt specifically comprises:
judging whether the temperature change value △ T meets a set temperature value M or not;
if yes, the output heat exchanger is not dirty and blocked;
if not, the output heat exchanger is dirty and blocked.
4. The dirty-blockage detection method for the heat exchanger of the air conditioner as claimed in claim 3, wherein the unit exits a dirty-blockage detection mode of the heat exchanger after the output heat exchanger is not dirty-blocked; after the heat exchanger is filthy and blocked, the display continuously outputs a prompt signal accompanied by a prompt tone.
5. An air conditioner heat exchanger filth blockage detection method according to claim 3, wherein the heat exchanger filth blockage detection mode comprises an inner machine evaporator filth blockage detection mode and an outer machine condenser filth blockage detection mode.
6. The filth blockage detection method for the heat exchanger of the air conditioner as claimed in claim 5, wherein a set filth blockage detection mode of the internal evaporator is selected, and the unit operates according to the filth blockage detection mode of the internal evaporator;
in the refrigeration mode, if the temperature change value △ T is greater than M, dirty blockage of the inner machine evaporator is output, otherwise, dirty blockage is not generated;
when in the heating mode, if the temperature change value △ T is less than M, dirty blockage of the inner machine evaporator is output, otherwise, dirty blockage is not caused.
7. The method for detecting the filth blockage of the heat exchanger of the air conditioner as claimed in claim 5, wherein a set 'filth blockage detection' mode of the outdoor unit condenser is selected, and the unit operates according to the 'filth blockage detection' mode of the outdoor unit condenser;
in the refrigeration mode, if the temperature change value △ T is less than M, the condenser of the output outdoor unit is dirty and blocked, otherwise, the condenser is not dirty and blocked;
and in the heating mode, if the temperature change value △ T is greater than M, the condenser of the output outdoor unit is dirty and blocked, otherwise, the condenser of the output outdoor unit is not dirty and blocked.
8. The method for detecting the filth blockage of the heat exchanger of the air conditioner as claimed in claim 1, wherein the temperatures of the heat exchange fluids on the two sides of the heat exchanger are specifically the temperature of the fluid at the inlet of the heat exchanger and the temperature of the fluid at the outlet of the heat exchanger.
9. An air conditioner heat exchanger filth blockage testing method as defined in claim 1, wherein the temperature detecting means is a temperature sensor.
10. The air conditioner is characterized by comprising a heat exchanger and temperature detection devices arranged at an inlet and an outlet of the heat exchanger, and is used for realizing the filth blockage detection method of the heat exchanger of the air conditioner.
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| CN201911338123.5A CN111140990A (en) | 2019-12-23 | 2019-12-23 | Filth blockage detection method for air conditioner heat exchanger and air conditioner |
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| CN201911338123.5A CN111140990A (en) | 2019-12-23 | 2019-12-23 | Filth blockage detection method for air conditioner heat exchanger and air conditioner |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811108A (en) * | 2020-06-08 | 2020-10-23 | 珠海格力电器股份有限公司 | Heat exchanger filth blockage detection method and device |
| CN114087714A (en) * | 2021-11-10 | 2022-02-25 | 珠海格力电器股份有限公司 | Air conditioner filter screen filth blockage detection method and device and air conditioner |
| CN114235451A (en) * | 2021-11-15 | 2022-03-25 | 青岛海尔空调电子有限公司 | Heat exchanger detection method, storage medium and electronic device |
| CN114383262A (en) * | 2021-12-20 | 2022-04-22 | 珠海格力电器股份有限公司 | Air conditioner indoor unit cleanliness detection method and air conditioner |
| CN115111703A (en) * | 2022-06-23 | 2022-09-27 | 博锐尚格科技股份有限公司 | Method, terminal and storage medium for detecting filth blockage of water-cooled air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114235451A (en) * | 2021-11-15 | 2022-03-25 | 青岛海尔空调电子有限公司 | Heat exchanger detection method, storage medium and electronic device |
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| CN115111703B (en) * | 2022-06-23 | 2023-10-27 | 博锐尚格科技股份有限公司 | Method, terminal and storage medium for detecting filth blockage of water-cooled air conditioner |
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