CN105202695A - Dust removal control method and device for heat exchanger of outdoor unit of air conditioner - Google Patents
Dust removal control method and device for heat exchanger of outdoor unit of air conditioner Download PDFInfo
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- CN105202695A CN105202695A CN201510567730.4A CN201510567730A CN105202695A CN 105202695 A CN105202695 A CN 105202695A CN 201510567730 A CN201510567730 A CN 201510567730A CN 105202695 A CN105202695 A CN 105202695A
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000000428 dust Substances 0.000 title claims abstract description 44
- 230000000694 effects Effects 0.000 abstract description 20
- 238000010438 heat treatment Methods 0.000 description 13
- 239000004411 aluminium Substances 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 11
- 239000012535 impurity Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000005057 refrigeration Methods 0.000 description 7
- 230000009191 jumping Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Abstract
The invention discloses a dust removal control method for a heat exchanger of an outdoor unit of an air conditioner. The method comprises the following steps: acquiring the outer side temperature and the inner side temperature of the heat exchanger of the outdoor unit in real time at a preset time interval; determining whether dust removal start conditions are met according to the outer side temperature and the inner side temperature of the heat exchanger of the outdoor unit; controlling an outdoor fan to rotate reversely to perform dust removal treatment on the heat exchanger of the outdoor unit if the outer side temperature and the inner side temperature of the heat exchanger of the outdoor unit meet the dust removal start conditions. The invention further discloses a dust removal control device for the heat exchanger of the outdoor unit of the air conditioner. With adoption of the method and the device, dust removal can be performed on the heat exchanger of the outdoor unit automatically, and the heat exchange effect of the heat exchanger of the outdoor unit is improved.
Description
Technical field
The present invention relates to air-conditioner field, particularly relate to a kind of dedusting control method and device of heat exchanger of outdoor machine of air conditioner.
Background technology
Manufacture field at domestic air conditioning, domestic air conditioner mainly comprises: the large part of compressor, condenser, throttling arrangement, evaporimeter four.Being generally of current domestic air conditioner is air-cooled, and its heat exchanger is generally air cooling fin formula, i.e. fin cover copper pipe type.Some efficient single coolers are in order to improve monomer exchange capability of heat, the reduction condensation temperature of condenser and improve complete machine Energy Efficiency Ratio at present, and outdoor condenser adopts the full aluminium condenser of concurrent flow.There is several hole every bar flat tube inside of concurrent flow full aluminium condenser, hole wall has rib, and cold-producing medium will at aluminium Bottomhole pressure, and there is the more thread structure be similar in inner screw thread copper pipe aluminium strip inside, effectively can increase the flow-disturbing of heat exchange area and cold-producing medium, augmentation of heat transfer effect.The heat transfer effect that full aluminium condenser has conventional condenser incomparable, unit draught area exchange capability of heat and unit volume exchange capability of heat are all considerably beyond conventional condenser.Flat tube and the waveform aluminium strip of the full aluminium condenser of concurrent flow are that its face coat fusing point, lower than the fusing point of aluminium, first can melt, fully combine with flat tube in heating process by together with wave soldering.The off-premises station of air-conditioner is generally arranged on outdoor, the flat tube of the full aluminium condenser of concurrent flow be arranged in parallel, and fin is waveform, therefore when the fin of post-condenser running a period of time being attached with the dust and other impurities in surrounding environment, these dust and other impurities are easy to be deposited in windward side, and because a fin pitch of fins is closeer, dust and other impurities is mainly deposited in fin surface.These dust and other impurities are all generally the non-conductors of heat, and can affect the radiating effect of condenser, dust and other impurities also blocks air can flow through condenser surface in addition, reduces heat transfer effect.
Foregoing, only for auxiliary understanding technical scheme of the present invention, does not represent and admits that foregoing is prior art.
Summary of the invention
Main purpose of the present invention is the dedusting control method and the device that provide a kind of heat exchanger of outdoor machine of air conditioner, is intended to realize automatically carrying out dedusting to outdoor unit heat exchanger, improves the heat transfer effect of outdoor unit heat exchanger.
For achieving the above object, the invention provides a kind of dedusting control method of heat exchanger of outdoor machine of air conditioner, the method comprises:
According to temperature outside and the inner side temperature of prefixed time interval Real-time Obtaining outdoor unit heat exchanger;
Judge whether to meet according to the temperature outside of described outdoor unit heat exchanger and inner side temperature and start dedusting condition;
If the temperature outside of described outdoor unit heat exchanger and inner side temperature meet start dedusting condition, then control outdoor fan reversion and dust removal process is carried out to outdoor unit heat exchanger.
Preferably, described control outdoor fan reversion comprises the step that outdoor unit heat exchanger carries out dust removal process:
Control outdoor fan and compressor out of service, and control the first timer and start timing;
When the clocking value of described first timer reaches the first Preset Time, control outdoor fan start and normally to run time contrary direction rotate, and control compressor start; And control the first timer and restart timing;
When the clocking value of described first timer reaches the second Preset Time, control outdoor fan and compressor out of service, and control the first timer and restart timing;
When the clocking value of described first timer reaches the first Preset Time, control outdoor fan and start and rotate with normal traffic direction, and control compressor start.
Preferably, the described temperature outside according to described outdoor unit heat exchanger and inner side temperature judge whether that meeting the step starting dedusting condition comprises:
Judge whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the first preset temperature threshold values;
If the temperature difference of the temperature outside of described outdoor unit heat exchanger and inner side temperature is greater than the first preset temperature threshold values, determine to meet startup dedusting condition.
Preferably, described judge whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the step of the first preset temperature threshold values after, the method also comprises:
If the temperature difference of the temperature outside of described outdoor unit heat exchanger and inner side temperature is greater than the first preset temperature threshold values, then after judging, whether the temperature outside of described outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature are all greater than the first preset temperature threshold values;
If the temperature outside of the described outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature are all greater than the first preset temperature threshold values afterwards, determine to meet startup dedusting condition.
Preferably, described judge whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the step of the first preset temperature threshold values after, the method also comprises:
If the temperature difference of the temperature outside of described outdoor unit heat exchanger and inner side temperature is less than the first preset temperature threshold values, then judge whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the second preset temperature threshold values;
If the temperature difference of the temperature outside of described outdoor unit heat exchanger and inner side temperature is greater than the second preset temperature threshold values, then after judging, whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature of continuous second preset times are all greater than the second preset temperature threshold values, are less than the first preset temperature threshold values and are increasing trend;
If the temperature outside of the described outdoor unit heat exchanger of continuous second preset times and the temperature difference of inner side temperature are all greater than the second preset temperature threshold values afterwards, be less than the first preset temperature threshold values and in increasing trend, determine to meet and start dedusting condition.
In addition, for achieving the above object, the present invention also provides a kind of dedusting control device of heat exchanger of outdoor machine of air conditioner, and this device comprises:
First temperature sensor, for the temperature outside according to prefixed time interval Real-time Obtaining outdoor unit heat exchanger;
Second temperature sensor, for the inner side temperature according to prefixed time interval Real-time Obtaining outdoor unit heat exchanger;
Judge module, starts dedusting condition for judging whether to meet according to the temperature outside of described outdoor unit heat exchanger and inner side temperature;
Control module, when starting dedusting condition for meeting in the temperature outside of described outdoor unit heat exchanger and inner side temperature, controlling outdoor fan reversion and carrying out dust removal process to outdoor unit heat exchanger.
Preferably, described control module comprises:
First control unit, for controlling outdoor fan and compressor is out of service, and controls the first timer and starts timing;
Second control unit, for when the clocking value of described first timer reaches the first Preset Time, control outdoor fan start and normally to run time contrary direction rotate, and control compressor start; And control the first timer and restart timing;
3rd control unit, for when the clocking value of described first timer reaches the second Preset Time, control outdoor fan and compressor out of service, and control the first timer and restart timing;
4th control unit, for when the clocking value of described first timer reaches the first Preset Time, controls outdoor fan and starts and rotate with normal traffic direction, and control compressor start.
Preferably, described judge module comprises:
First judging unit, whether the temperature difference for the temperature outside and inner side temperature that judge described outdoor unit heat exchanger is greater than the first preset temperature threshold values;
First determining unit, for when the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the first preset temperature threshold values, determines to meet startup dedusting condition.
Preferably, described judge module also comprises:
Second judging unit, for when the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the first preset temperature threshold values, after judgement, whether the temperature outside of the described outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature are all greater than the first preset temperature threshold values;
Second determining unit, for being all greater than the first preset temperature threshold values in the temperature outside of the described outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature afterwards, determining to meet and starts dedusting condition.
Preferably, described judge module also comprises:
3rd judging unit, for when the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are less than the first preset temperature threshold values, judge whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the second preset temperature threshold values;
4th judging unit, for when the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the second preset temperature threshold values, after judgement, whether the temperature outside of the described outdoor unit heat exchanger of continuous second preset times and the temperature difference of inner side temperature are all greater than the second preset temperature threshold values, are less than the first preset temperature threshold values and in increasing trend;
3rd determining unit, for being all greater than the second preset temperature threshold values in the temperature outside of the described outdoor unit heat exchanger of continuous second preset times and the temperature difference of inner side temperature afterwards, be less than the first preset temperature threshold values and in increasing trend time, determine to meet and start dedusting condition.
The dedusting control method of heat exchanger of outdoor machine of air conditioner of the present invention and device, by according to the temperature outside of prefixed time interval Real-time Obtaining outdoor unit heat exchanger and inner side temperature; Judge whether to meet according to the temperature outside of described outdoor unit heat exchanger and inner side temperature and start dedusting condition; If the temperature outside of described outdoor unit heat exchanger and inner side temperature meet start dedusting condition, then control outdoor fan reversion and dust removal process is carried out to outdoor unit heat exchanger; Namely according to temperature outside and the inner side temperature of outdoor unit heat exchanger, determine whether to need to carry out dust removal process to outdoor unit heat exchanger, when the temperature outside of this outdoor unit heat exchanger and inner side temperature meet dedusting condition, control outdoor fan reversion and dust removal process is carried out to outdoor unit heat exchanger, realize automatically carrying out dedusting to outdoor unit heat exchanger, improve the heat transfer effect of outdoor unit heat exchanger, and be utilize the original outdoor fan heat exchanger of off-premises station to carry out dedusting, without the need to increasing fan, can effectively control cost.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the preferred embodiment of the dedusting control method of heat exchanger of outdoor machine of air conditioner of the present invention;
Fig. 2 a is the schematic diagram of the arranged outside temperature sensor of outdoor heat exchanger in the present invention;
Fig. 2 b is the schematic diagram of the inner side set temperature sensor of outdoor heat exchanger in the present invention;
Fig. 3 controls dust removal process is carried out in outdoor fan reversion refinement schematic flow sheet to outdoor unit heat exchanger in the dedusting control method of heat exchanger of outdoor machine of air conditioner of the present invention;
Fig. 4 judges whether to meet the first embodiment refinement schematic flow sheet starting dedusting condition according to the temperature outside of described outdoor unit heat exchanger and inner side temperature in the dedusting control method of heat exchanger of outdoor machine of air conditioner of the present invention;
Fig. 5 judges whether to meet the second embodiment refinement schematic flow sheet starting dedusting condition according to the temperature outside of described outdoor unit heat exchanger and inner side temperature in the dedusting control method of heat exchanger of outdoor machine of air conditioner of the present invention;
Fig. 6 is the structural representation of the preferred embodiment of the dedusting control device of heat exchanger of outdoor machine of air conditioner of the present invention;
Fig. 7 is the refined structure schematic diagram of the control module in the dedusting control device of heat exchanger of outdoor machine of air conditioner of the present invention;
Fig. 8 is the refined structure schematic diagram of the first embodiment of judge module in the dedusting control device of heat exchanger of outdoor machine of air conditioner of the present invention;
Fig. 9 is the refined structure schematic diagram of the second embodiment of judge module in the dedusting control device of heat exchanger of outdoor machine of air conditioner of the present invention;
Figure 10 is the refined structure schematic diagram of the 3rd embodiment of judge module in the dedusting control device of heat exchanger of outdoor machine of air conditioner of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With reference to the schematic flow sheet that Fig. 1, Fig. 1 are the preferred embodiment of the dedusting control method of heat exchanger of outdoor machine of air conditioner of the present invention, the method comprises:
S10, according to the temperature outside of prefixed time interval Real-time Obtaining outdoor unit heat exchanger and inner side temperature.
Arrange a temperature sensor respectively in the outside of outdoor unit heat exchanger 1 and inner side, be respectively the first temperature sensor 10 and the second temperature sensor 20, as shown in Figure 2 a and 2 b, the heat-transfer surface of outdoor unit heat exchanger 1 is inner side.In one embodiment, can temperature sensor be separately positioned on outside outdoor unit heat exchanger and the middle part of inner side.Temperature outside T1 and the inner side temperature T2 of outdoor unit heat exchanger is obtained respectively by the outside of machine heat exchanger disposed in the outdoor and the temperature sensor of inner side.This outdoor unit heat exchanger can be the full aluminium condenser of concurrent flow.
This prefixed time interval can be arranged as required, as being set to one minute, then obtains temperature outside and the inner side temperature of outdoor unit heat exchanger every one minute simultaneously.
S20, judge whether to meet according to the temperature outside of this outdoor unit heat exchanger and inner side temperature and start dedusting condition, if the temperature outside of this outdoor unit heat exchanger and inner side temperature meet start dedusting condition, then perform step S30.
Common, when on outdoor unit heat exchanger, accumulation has dust and other impurities and acquires a certain degree, dust and other impurities on outdoor unit heat exchanger can affect radiating effect and the heat transfer effect of outdoor unit heat exchanger, make the temperature outside on outdoor unit heat exchanger and inner side temperature difference larger; Therefore, in this step, temperature outside and inner side temperature by judging outdoor unit heat exchanger determine whether to meet and start dedusting condition, to determine whether to need to carry out dedusting to outdoor unit heat exchanger.
S30, the reversion of control outdoor fan carry out dust removal process to outdoor unit heat exchanger.
Control the reversion of outdoor fan (not shown) and carry out dust removal process, outdoor fan is reversed drive fan blade to produce contrary reverse distinguished and admirable in direction when normally working with outdoor fan, outside namely the wind direction of outdoor fan is blowed to by inner side; Thus the dust and other impurities that can effectively remove on outdoor unit heat exchanger, automatically dust removal process is carried out to outdoor unit heat exchanger.In the present embodiment, outdoor fan is arranged on the chassis 30 of air-conditioner outdoor unit, and the fan blade of outdoor fan just to outdoor unit heat exchanger 1, and is positioned at the inner side of outdoor unit heat exchanger 1, near the second temperature sensor 20.Preferably, the fan blade of outdoor fan is designed to rotating forward, can produces structure compared with Wind Volume in reversion two kinds of situations.
Adopt above-described embodiment, by according to the temperature outside of prefixed time interval Real-time Obtaining outdoor unit heat exchanger and inner side temperature; Judge whether to meet according to the temperature outside of this outdoor unit heat exchanger and inner side temperature and start dedusting condition; If the temperature outside of this outdoor unit heat exchanger and inner side temperature meet start dedusting condition, then control outdoor fan reversion and dust removal process is carried out to outdoor unit heat exchanger; Namely according to temperature outside and the inner side temperature of outdoor unit heat exchanger, determine whether to need to carry out dust removal process to outdoor unit heat exchanger, when the temperature outside of this outdoor unit heat exchanger and inner side temperature meet dedusting condition, control outdoor fan reversion and dust removal process is carried out to outdoor unit heat exchanger, realize automatically carrying out dedusting to outdoor unit heat exchanger, improve the heat transfer effect of outdoor unit heat exchanger, and be utilize the original outdoor fan heat exchanger of off-premises station to carry out dedusting, without the need to increasing fan, can effectively control cost.
Reference Fig. 4, Fig. 4 control dust removal process is carried out in outdoor fan reversion refinement schematic flow sheet to outdoor unit heat exchanger in the dedusting control method of heat exchanger of outdoor machine of air conditioner of the present invention, details are as follows:
S31, control outdoor fan and compressor out of service, and control the first timer and start timing.
In this step, simultaneously control room inner blower keeps original state to run, cold blowing more than in the evaporimeter of indoor set to be gone out.In order to outdoor fan is reversed, then need first in this step, outdoor fan is out of service, instead of directly outdoor fan is reversed, the service life of outdoor fan can be improved.
For avoiding because outdoor fan is out of service, heat exchanger of outdoor unit cannot be dispelled the heat, and causes compressor stop jumping; affect the service life of compressor, in this step, while control outdoor fan is out of service; control compressor is out of service, effectively can protect compressor.
In this step, control the first timer and start timing, to calculate the outdoor fan duration out of service.
S32, when the clocking value of this first timer reaches the first Preset Time, control outdoor fan start and normally to run time contrary direction rotate, and control compressor start; And control the first timer and restart timing.
This first Preset Time can be arranged as required, in one embodiment, this first Preset Time can be set to 39 seconds.This first Preset Time for outdoor fan is under normal circumstances when receiving halt instruction, from run up inactive state time required maximum time.
When the clocking value of this first timer reaches the first Preset Time, think that this outdoor fan becomes inactive state, then control outdoor fan to start, and direction contrary during normally to run rotates, during as normally run, the wind direction of outdoor fan blows to inner side by outside, then in this step, the wind direction of outdoor fan blows to outside by inner side.
In this step, also control compressor start, make air-conditioner also can continue realize refrigeration or heating effect, namely before air-conditioner when refrigerating operaton, then continue to realize refrigeration, before air-conditioner when heating operation, then continue to realize heating effect; Also need the delivery temperature detecting compressor in real time, when delivery temperature is greater than preset security threshold temperature, control compressor out of service.This preset security threshold temperature can be arranged as required, usually can be set to 115 DEG C.
In this step, control the first timer and restart timing, the count value by the first timer first resets, and then restarts timing, the duration that direction contrary during to calculate outdoor fan normally to run rotates.
S32, when the clocking value of this first timer reaches the second Preset Time, control outdoor fan and compressor out of service, and control the first timer and restart timing.
This second Preset Time can be arranged as required, in one embodiment, this second Preset Time can be set to 10 minutes.
When the clocking value of this first timer reaches the second Preset Time, outdoor fan is needed to return to normal rotation, then need first in this step, outdoor fan is out of service, instead of directly outdoor fan is directly changed to rotating forward (wind direction of outdoor fan is become outside-in from inner side to outside) from reversion, the service life of outdoor fan can be improved.
For avoiding because outdoor fan is out of service, heat exchanger of outdoor unit cannot be dispelled the heat, and causes compressor stop jumping; affect the service life of compressor, in this step, while control outdoor fan is out of service; control compressor is out of service, effectively can protect compressor.
In this step, control the first timer and restart timing, the count value by the first timer first resets, and then restarts timing, to calculate the outdoor fan duration out of service.
S33, when the clocking value of this first timer reaches the first Preset Time, control outdoor fan start and rotate with normal traffic direction, and control compressor start.
When the clocking value of this first timer reaches the first Preset Time, think that this outdoor fan becomes inactive state, then control outdoor fan and start, and rotate with normal traffic direction, the wind direction outside-in of outdoor fan.
In this step, also control compressor start, make air-conditioner also can continue normal realization and freeze or heating effect, namely before air-conditioner when refrigerating operaton, then continue to realize refrigeration, before air-conditioner when heating operation, then continue to realize heating effect.
Be the refinement schematic flow sheet of the first embodiment judging whether satisfied startup dedusting condition in the dedusting control method of heat exchanger of outdoor machine of air conditioner of the present invention according to the temperature outside of this outdoor unit heat exchanger and inner side temperature with reference to Fig. 4, Fig. 4, details are as follows:
Whether the temperature difference of S21, the temperature outside judging this outdoor unit heat exchanger and inner side temperature is greater than the first preset temperature threshold values, if the temperature difference of the temperature outside of this outdoor unit heat exchanger and inner side temperature is greater than the first preset temperature threshold values, then perform step S22, otherwise perform step S23.
This first preset temperature threshold values D can be arranged as required, common, for air-conditioner refrigerating operaton, half can be blocked (not by dust blocking and the intermediateness all blocked by dust in heat exchanger of outdoor unit, namely the air channel of heat exchanger of outdoor unit has the draught area of half blocked), when ambient temperature is 45 DEG C, measure temperature outside and the inner side temperature of heat exchanger of outdoor unit, the difference of the temperature outside of the heat exchanger of outdoor unit now measured and inner side temperature is set to the first preset temperature threshold values.Usually this first preset temperature threshold values can be arranged between 15 DEG C-20 DEG C.
In this step, judge whether the temperature outside of this outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the first preset temperature threshold values, if the temperature difference of the temperature outside of this outdoor unit heat exchanger and inner side temperature is greater than the first preset temperature threshold values, then think and reach dedusting condition, need to carry out dust removal process to outdoor unit heat exchanger.
S22, determine to meet and start dedusting condition.
Whether the temperature difference of S23, the temperature outside judging this outdoor unit heat exchanger and inner side temperature is greater than the second preset temperature threshold values, if the temperature difference of the temperature outside of this outdoor unit heat exchanger and inner side temperature is greater than the second preset temperature threshold values, then performs step S24.
This second preset temperature threshold values B can be arranged as required, common, for air-conditioner refrigerating operaton, 1/3rd can be blocked in heat exchanger of outdoor unit, when ambient temperature is 45 DEG C, measure temperature outside and the inner side temperature of heat exchanger of outdoor unit, the difference of the temperature outside of the heat exchanger of outdoor unit now measured and inner side temperature is set to the second preset temperature threshold values.Usually this second preset temperature threshold values can be arranged between 10 DEG C-15 DEG C.
In this step, judge whether the temperature outside of this outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the second preset temperature threshold values, if the temperature difference of the temperature outside of this outdoor unit heat exchanger and inner side temperature is less than or equal to the second preset temperature threshold values, then think not reach and start dedusting condition, outdoor fan rotates according to normal direction, the wind direction outside-in of outdoor fan.
S24, judge after the temperature outside of this outdoor unit heat exchanger and the temperature difference of inner side temperature of continuous second preset times whether be all greater than the second preset temperature threshold values, be less than the first preset temperature threshold values and be increasing trend; If the temperature outside of this outdoor unit heat exchanger of continuous second preset times and the temperature difference of inner side temperature are all greater than the second preset temperature threshold values afterwards, be less than the first preset temperature threshold values and in increasing trend, then perform step S22.
This second preset times can be arranged as required, common, this second preset times can be set to five times.
In this step, after judgement, whether the temperature outside of this outdoor unit heat exchanger of continuous second preset times and the temperature difference of inner side temperature are all greater than the second preset temperature threshold values, are less than the first preset temperature threshold values and in increasing trend, if this second preset times is five times, the temperature outside of five outdoor unit heat exchangers after being somebody's turn to do and the temperature difference of inner side temperature are respectively △ T
1, △ T
2, △ T
3, △ T
4with △ T
5, then these △ T are judged
1, △ T
2, △ T
3, △ T
4with △ T
5whether be all greater than B, be less than D, and △ T
1< △ T
2< △ T
3< △ T
4< △ T
5, if so, then can determine to meet startup dedusting condition.
Be the refinement schematic flow sheet of the second embodiment judging whether satisfied startup dedusting condition in the dedusting control method of heat exchanger of outdoor machine of air conditioner of the present invention according to the temperature outside of this outdoor unit heat exchanger and inner side temperature with reference to Fig. 5, Fig. 5, details are as follows:
Whether the temperature difference of S25, the temperature outside judging this outdoor unit heat exchanger and inner side temperature is greater than the first preset temperature threshold values, if the temperature difference of the temperature outside of this outdoor unit heat exchanger and inner side temperature is greater than the first preset temperature threshold values, then performs step S26.
This step is identical with above-mentioned steps S21, is not repeated herein.
S26, judge after the temperature outside of this outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature whether be all greater than the first preset temperature threshold values; If the temperature outside of this outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature are all greater than the first preset temperature threshold values afterwards, then perform step S27.
This first preset times can be arranged as required, common, this second preset times can be set to ten times.
In this step, after judgement, whether the temperature outside of this outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature are all greater than the first preset temperature threshold values, if this first preset times is ten times, the temperature outside of ten outdoor unit heat exchangers after being somebody's turn to do and the temperature difference of inner side temperature are respectively △ T
11, △ T
12, △ T
13, △ T
14, △ T
15, △ T
16, △ T
17, △ T
18, △ T
19with △ T
20, then these △ T are judged
11, △ T
12, △ T
13, △ T
14, △ T
15, △ T
16, △ T
17, △ T
18, △ T
19with △ T
20whether be all greater than D, if so, then can determine to meet startup dedusting condition.
S27, determine to meet and start dedusting condition.
With reference to the structural representation that Fig. 6, Fig. 6 are the preferred embodiment of the dedusting control device of heat exchanger of outdoor machine of air conditioner of the present invention, this device comprises:
First temperature sensor 10, for the temperature outside according to prefixed time interval Real-time Obtaining outdoor unit heat exchanger;
Second temperature sensor 20, for the inner side temperature according to prefixed time interval Real-time Obtaining outdoor unit heat exchanger;
Judge module 30, starts dedusting condition for judging whether to meet according to the temperature outside of this outdoor unit heat exchanger and inner side temperature;
Control module 40, when starting dedusting condition for meeting in the temperature outside of this outdoor unit heat exchanger and inner side temperature, controlling outdoor fan reversion and carrying out dust removal process to outdoor unit heat exchanger.
The outside of this first temperature sensor 10 machine heat exchanger 1 disposed in the outdoor, the inner side of this second temperature sensor 20 machine heat exchanger 1 disposed in the outdoor, as shown in Figure 2 a and 2 b, the heat-transfer surface of outdoor unit heat exchanger 1 is inner side.In one embodiment, can by the first temperature sensor 10 and the second temperature sensor 20 be separately positioned on outside outdoor unit heat exchanger and the middle part of inner side.Temperature outside T1 and the inner side temperature T2 of outdoor unit heat exchanger is obtained respectively by the outside of machine heat exchanger disposed in the outdoor and the temperature sensor of inner side.This outdoor unit heat exchanger can be the full aluminium condenser of concurrent flow.
This prefixed time interval can be arranged as required, as being set to one minute, then obtains temperature outside and the inner side temperature of outdoor unit heat exchanger every one minute simultaneously.
Common, when on outdoor unit heat exchanger, accumulation has dust and other impurities and acquires a certain degree, dust and other impurities on outdoor unit heat exchanger can affect radiating effect and the heat transfer effect of outdoor unit heat exchanger, make the temperature outside on outdoor unit heat exchanger and inner side temperature difference larger; Therefore, this judge module 30 determines whether to meet by the temperature outside and inner side temperature judging outdoor unit heat exchanger and starts dedusting condition, to determine whether to need to carry out dedusting to outdoor unit heat exchanger.
Control module 40 the temperature outside of this outdoor unit heat exchanger and inner side temperature meet start dedusting condition time, control the reversion of outdoor fan (not shown) and carry out dust removal process, outdoor fan is reversed drive fan blade to produce contrary reverse distinguished and admirable in direction when normally working with outdoor fan, outside namely the wind direction of outdoor fan is blowed to by inner side; Thus the dust and other impurities that can effectively remove on outdoor unit heat exchanger, automatically dust removal process is carried out to outdoor unit heat exchanger.In the present embodiment, outdoor fan is arranged on the chassis 30 of air-conditioner outdoor unit, and the fan blade of outdoor fan just to outdoor unit heat exchanger 1, and is positioned at the inner side of outdoor unit heat exchanger 1, near the second temperature sensor 20.Preferably, the fan blade of outdoor fan is designed to rotating forward, can produces structure compared with Wind Volume in reversion two kinds of situations.
With reference to the refined structure schematic diagram that Fig. 7, Fig. 7 are control module in the dedusting control device of heat exchanger of outdoor machine of air conditioner of the present invention, this control module 40 comprises:
First control unit 41, for controlling outdoor fan and compressor is out of service, and controls the first timer and starts timing;
Second control unit 42, for when the clocking value of this first timer reaches the first Preset Time, control outdoor fan start and normally to run time contrary direction rotate, and control compressor start; And control the first timer and restart timing;
3rd control unit 43, for when the clocking value of this first timer reaches the second Preset Time, control outdoor fan and compressor out of service, and control the first timer and restart timing;
4th control unit 44, for when the clocking value of this first timer reaches the first Preset Time, controls outdoor fan and starts and rotate with normal traffic direction, and control compressor start.
This first control unit 41 simultaneously control room inner blower keeps original state to run, cold blowing more than in the evaporimeter of indoor set to be gone out.In order to be reversed by outdoor fan, this first control unit 41 is first out of service by outdoor fan, instead of is directly reversed by outdoor fan, can improve the service life of outdoor fan.
For avoiding because outdoor fan is out of service, heat exchanger of outdoor unit cannot be dispelled the heat, and causes compressor stop jumping; affect the use of compressor; therefore the first control unit 41 is while control outdoor fan is out of service, controls compressor out of service, effectively can protect compressor.
This first control unit 41 controls the first timer and starts timing, to calculate the outdoor fan duration out of service.
This first Preset Time can be arranged as required, in one embodiment, this first Preset Time can be set to 39 seconds.This first Preset Time for outdoor fan is under normal circumstances when receiving halt instruction, from run up inactive state time required maximum time.
Control after timer starts timing at this first control unit 41, when the clocking value of this first timer reaches the first Preset Time, think that this outdoor fan becomes inactive state, then this second control unit 42 controls outdoor fan startup, and direction contrary during normally to run rotates, during as normally run, the wind direction of outdoor fan blows to inner side by outside, and the wind direction that this second control unit 42 controls outdoor fan blows to outside by inner side.
This second control unit 42 also controls compressor start, make air-conditioner also can continue to realize refrigeration or heating effect, namely before air-conditioner when refrigerating operaton, then continue to realize refrigeration, before air-conditioner when heating operation, then continue to realize heating effect; Also need the delivery temperature detecting compressor in real time, when delivery temperature is greater than preset security threshold temperature, control compressor out of service.This preset security threshold temperature can be arranged as required, usually can be set to 115 DEG C.
This second control unit 42 controls the first timer and restarts timing, and the count value by the first timer first resets, and then restarts timing, the duration that direction contrary during to calculate outdoor fan normally to run rotates.
This second Preset Time can be arranged as required, in one embodiment, this second Preset Time can be set to 10 minutes.
Control after timer starts timing at this second control unit 42, when the clocking value of this first timer reaches the second Preset Time, outdoor fan is needed to return to normal rotation, then the 3rd control unit 43 is out of service by outdoor fan, instead of directly outdoor fan is directly changed to rotating forward (wind direction of outdoor fan is become outside-in from inner side to outside) from reversion, the service life of outdoor fan can be improved.
For avoiding because outdoor fan heat exchanger of outdoor unit out of service cannot be dispelled the heat; cause compressor stop jumping, affect the service life of compressor, the 3rd control unit is while control outdoor fan is out of service; control compressor is out of service, effectively can protect compressor.
3rd control unit 43 controls the first timer and restarts timing, and the count value by the first timer first resets, and then restarts timing, to calculate the outdoor fan duration out of service.
Control after timer starts timing at the 3rd control unit 43, when the clocking value of this first timer reaches the first Preset Time, think that this outdoor fan becomes inactive state, then the 4th control unit 44 controls outdoor fan startup, and rotate with normal traffic direction, the wind direction outside-in of outdoor fan.
4th control unit 44 also controls compressor start, make air-conditioner also can continue normal to realize refrigeration or heating effect, namely before air-conditioner when refrigerating operaton, then continue to realize refrigeration, before air-conditioner when heating operation, then continue to realize heating effect.
Be the refined structure schematic diagram of the first embodiment of judge module in the dedusting control device of heat exchanger of outdoor machine of air conditioner of the present invention with reference to Fig. 8, Fig. 8, this judge module comprises:
First judging unit 31, whether the temperature difference for the temperature outside and inner side temperature that judge this outdoor unit heat exchanger is greater than the first preset temperature threshold values;
First determining unit 32, for when the temperature outside of this outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the first preset temperature threshold values, determines to meet startup dedusting condition.
This first preset temperature threshold values D can be arranged as required, common, for air-conditioner refrigerating operaton, half can be blocked (not by dust blocking and the intermediateness all blocked by dust in heat exchanger of outdoor unit, namely the air channel of heat exchanger of outdoor unit has the draught area of half blocked), when ambient temperature is 45 DEG C, measure temperature outside and the inner side temperature of heat exchanger of outdoor unit, the difference of the temperature outside of the heat exchanger of outdoor unit now measured and inner side temperature is set to the first preset temperature threshold values.Common, this first preset temperature threshold values can be arranged between 15 DEG C-20 DEG C.
This first judging unit 31 judges whether the temperature outside of this outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the first preset temperature threshold values, if the temperature difference of the temperature outside of this outdoor unit heat exchanger and inner side temperature is greater than the first preset temperature threshold values, then think and reach dedusting condition, need to carry out dust removal process to outdoor unit heat exchanger.
Be the refined structure schematic diagram of the second embodiment of judge module in the dedusting control device of heat exchanger of outdoor machine of air conditioner of the present invention with reference to Fig. 9, Fig. 9, this judge module also comprises:
Second judging unit 33, for when the temperature outside of this outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the first preset temperature threshold values, after judgement, whether the temperature outside of this outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature are all greater than the first preset temperature threshold values;
Second determining unit 34, for being all greater than the first preset temperature threshold values in the temperature outside of this outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature afterwards, determining to meet and starts dedusting condition.
This first preset times can be arranged as required, common, this second preset times can be set to ten times.
After this second judging unit 33 judges, whether the temperature outside of this outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature are all greater than the first preset temperature threshold values, if this first preset times is ten times, the temperature outside of ten outdoor unit heat exchangers after being somebody's turn to do and the temperature difference of inner side temperature are respectively △ T
11, △ T
12, △ T
13, △ T
14, △ T
15, △ T
16, △ T
17, △ T
18, △ T
19with △ T
20, then these △ T are judged
11, △ T
12, △ T
13, △ T
14, △ T
15, △ T
16, △ T
17, △ T
18, △ T
19with △ T
20whether be all greater than D, if so, then can determine to meet startup dedusting condition.
Be the refined structure schematic diagram of the 3rd embodiment of judge module in the dedusting control device of heat exchanger of outdoor machine of air conditioner of the present invention with reference to Figure 10, Figure 10, this judge module also comprises:
3rd judging unit 35, for when the temperature outside of this outdoor unit heat exchanger and the temperature difference of inner side temperature are less than the first preset temperature threshold values, judges whether the temperature outside of this outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the second preset temperature threshold values;
4th judging unit 36, for when the temperature outside of this outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the second preset temperature threshold values, after judgement, whether the temperature outside of this outdoor unit heat exchanger of continuous second preset times and the temperature difference of inner side temperature are all greater than the second preset temperature threshold values, are less than the first preset temperature threshold values and in increasing trend;
3rd determining unit 37, for being all greater than the second preset temperature threshold values in the temperature outside of this outdoor unit heat exchanger of continuous second preset times and the temperature difference of inner side temperature afterwards, be less than the first preset temperature threshold values and in increasing trend time, determine to meet and start dedusting condition.
This second preset temperature threshold values B can be arranged as required, common, for air-conditioner refrigerating operaton, 1/3rd can be blocked in heat exchanger of outdoor unit, when ambient temperature is 45 DEG C, measure temperature outside and the inner side temperature of heat exchanger of outdoor unit, the difference of the temperature outside of the heat exchanger of outdoor unit now measured and inner side temperature is set to the second preset temperature threshold values.Usually this second preset temperature threshold values can be arranged between 10 DEG C-15 DEG C.
3rd judging unit 35 judges whether the temperature outside of this outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the second preset temperature threshold values, if the temperature difference of the temperature outside of this outdoor unit heat exchanger and inner side temperature is less than or equal to the second preset temperature threshold values, then think not reach and start dedusting condition, outdoor fan rotates according to normal direction, the wind direction outside-in of outdoor fan.
This second preset times can be arranged as required, common, this second preset times can be set to five times.
After 4th judging unit 36 judges, whether the temperature outside of this outdoor unit heat exchanger and the temperature difference of inner side temperature of continuous second preset times are all greater than the second preset temperature threshold values, are less than the first preset temperature threshold values and are increasing trend, if this second preset times is five times, the temperature outside of five outdoor unit heat exchangers after being somebody's turn to do and the temperature difference of inner side temperature are respectively △ T
1, △ T
2, △ T
3, △ T
4with △ T
5, then these △ T are judged
1, △ T
2, △ T
3, △ T
4with △ T
5whether be all greater than B, be less than D, and △ T
1< △ T
2< △ T
3< △ T
4< △ T
5, if so, then can determine to meet startup dedusting condition.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a dedusting control method for heat exchanger of outdoor machine of air conditioner, it is characterized in that, the method comprises:
According to temperature outside and the inner side temperature of prefixed time interval Real-time Obtaining outdoor unit heat exchanger;
Judge whether to meet according to the temperature outside of described outdoor unit heat exchanger and inner side temperature and start dedusting condition;
If the temperature outside of described outdoor unit heat exchanger and inner side temperature meet start dedusting condition, then control outdoor fan reversion and dust removal process is carried out to outdoor unit heat exchanger.
2. the dedusting control method of heat exchanger of outdoor machine of air conditioner as claimed in claim 1, is characterized in that, described control outdoor fan reversion comprises the step that outdoor unit heat exchanger carries out dust removal process:
Control outdoor fan and compressor out of service, and control the first timer and start timing;
When the clocking value of described first timer reaches the first Preset Time, control outdoor fan start and normally to run time contrary direction rotate, and control compressor start; And control the first timer and restart timing;
When the clocking value of described first timer reaches the second Preset Time, control outdoor fan and compressor out of service, and control the first timer and restart timing;
When the clocking value of described first timer reaches the first Preset Time, control outdoor fan and start and rotate with normal traffic direction, and control compressor start.
3. the dedusting control method of heat exchanger of outdoor machine of air conditioner as claimed in claim 1, is characterized in that, the described temperature outside according to described outdoor unit heat exchanger and inner side temperature judge whether that meeting the step starting dedusting condition comprises:
Judge whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the first preset temperature threshold values;
If the temperature difference of the temperature outside of described outdoor unit heat exchanger and inner side temperature is greater than the first preset temperature threshold values, determine to meet startup dedusting condition.
4. the dedusting control method of heat exchanger of outdoor machine of air conditioner as claimed in claim 3, it is characterized in that, described judge whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the step of the first preset temperature threshold values after, the method also comprises:
If the temperature difference of the temperature outside of described outdoor unit heat exchanger and inner side temperature is greater than the first preset temperature threshold values, then after judging, whether the temperature outside of described outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature are all greater than the first preset temperature threshold values;
If the temperature outside of the described outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature are all greater than the first preset temperature threshold values afterwards, determine to meet startup dedusting condition.
5. the dedusting control method of the heat exchanger of outdoor machine of air conditioner as described in claim 3 or 4, it is characterized in that, described judge whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the step of the first preset temperature threshold values after, the method also comprises:
If the temperature difference of the temperature outside of described outdoor unit heat exchanger and inner side temperature is less than the first preset temperature threshold values, then judge whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the second preset temperature threshold values;
If the temperature difference of the temperature outside of described outdoor unit heat exchanger and inner side temperature is greater than the second preset temperature threshold values, then after judging, whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature of continuous second preset times are all greater than the second preset temperature threshold values, are less than the first preset temperature threshold values and are increasing trend;
If the temperature outside of the described outdoor unit heat exchanger of continuous second preset times and the temperature difference of inner side temperature are all greater than the second preset temperature threshold values afterwards, be less than the first preset temperature threshold values and in increasing trend, determine to meet and start dedusting condition.
6. a dedusting control device for heat exchanger of outdoor machine of air conditioner, is characterized in that, this device comprises:
First temperature sensor, for the temperature outside according to prefixed time interval Real-time Obtaining outdoor unit heat exchanger;
Second temperature sensor, for the inner side temperature according to prefixed time interval Real-time Obtaining outdoor unit heat exchanger;
Judge module, starts dedusting condition for judging whether to meet according to the temperature outside of described outdoor unit heat exchanger and inner side temperature;
Control module, when starting dedusting condition for meeting in the temperature outside of described outdoor unit heat exchanger and inner side temperature, controlling outdoor fan reversion and carrying out dust removal process to outdoor unit heat exchanger.
7. the dedusting control device of heat exchanger of outdoor machine of air conditioner as claimed in claim 6, it is characterized in that, described control module comprises:
First control unit, for controlling outdoor fan and compressor is out of service, and controls the first timer and starts timing;
Second control unit, for when the clocking value of described first timer reaches the first Preset Time, control outdoor fan start and normally to run time contrary direction rotate, and control compressor start; And control the first timer and restart timing;
3rd control unit, for when the clocking value of described first timer reaches the second Preset Time, control outdoor fan and compressor out of service, and control the first timer and restart timing;
4th control unit, for when the clocking value of described first timer reaches the first Preset Time, controls outdoor fan and starts and rotate with normal traffic direction, and control compressor start.
8. the dedusting control device of heat exchanger of outdoor machine of air conditioner as claimed in claim 6, it is characterized in that, described judge module comprises:
First judging unit, whether the temperature difference for the temperature outside and inner side temperature that judge described outdoor unit heat exchanger is greater than the first preset temperature threshold values;
First determining unit, for when the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the first preset temperature threshold values, determines to meet startup dedusting condition.
9. the dedusting control device of heat exchanger of outdoor machine of air conditioner as claimed in claim 8, it is characterized in that, described judge module also comprises:
Second judging unit, for when the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the first preset temperature threshold values, after judgement, whether the temperature outside of the described outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature are all greater than the first preset temperature threshold values;
Second determining unit, for being all greater than the first preset temperature threshold values in the temperature outside of the described outdoor unit heat exchanger of continuous first preset times and the temperature difference of inner side temperature afterwards, determining to meet and starts dedusting condition.
10. the dedusting control device of heat exchanger of outdoor machine of air conditioner as claimed in claim 8 or 9, it is characterized in that, described judge module also comprises:
3rd judging unit, for when the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are less than the first preset temperature threshold values, judge whether the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the second preset temperature threshold values;
4th judging unit, for when the temperature outside of described outdoor unit heat exchanger and the temperature difference of inner side temperature are greater than the second preset temperature threshold values, after judgement, whether the temperature outside of the described outdoor unit heat exchanger of continuous second preset times and the temperature difference of inner side temperature are all greater than the second preset temperature threshold values, are less than the first preset temperature threshold values and in increasing trend;
3rd determining unit, for being all greater than the second preset temperature threshold values in the temperature outside of the described outdoor unit heat exchanger of continuous second preset times and the temperature difference of inner side temperature afterwards, be less than the first preset temperature threshold values and in increasing trend time, determine to meet and start dedusting condition.
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| CN112283863A (en) * | 2020-09-21 | 2021-01-29 | 珠海格力电器股份有限公司 | Self-cleaning control method and device for air conditioner external unit, storage medium and air conditioner |
| CN113669841A (en) * | 2021-08-31 | 2021-11-19 | 佛山市顺德区美的电子科技有限公司 | Method and device for detecting dust accumulation blockage of air conditioner, air conditioner and storage medium |
| CN113669841B (en) * | 2021-08-31 | 2022-09-30 | 佛山市顺德区美的电子科技有限公司 | Method and device for detecting dust accumulation blockage of air conditioner, air conditioner and storage medium |
| CN115289557A (en) * | 2022-08-18 | 2022-11-04 | 宁波奥克斯电气股份有限公司 | Air conditioner external unit turbulence device, turbulence control method and air conditioner |
| CN115289557B (en) * | 2022-08-18 | 2024-05-10 | 宁波奥克斯电气股份有限公司 | Air conditioner external unit turbulence device, turbulence control method and air conditioner |
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