CN104964400A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN104964400A CN104964400A CN201510434783.9A CN201510434783A CN104964400A CN 104964400 A CN104964400 A CN 104964400A CN 201510434783 A CN201510434783 A CN 201510434783A CN 104964400 A CN104964400 A CN 104964400A
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- relative humidity
- air
- conditioner
- compressor
- outdoor air
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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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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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
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
- F24F2110/22—Humidity of the outside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner and a control method thereof. The air conditioner comprises a compressor, a detection device and a controller. The detection device is used for acquiring the relative humidity of outdoor air. The controller is connected with the compressor and the detection device, and the controller is used for determining whether the relative humidity of the outdoor air is larger than the first preset relative humidity before the air conditioner works in a defrosting mode, and reducing the operation frequency of the compressor if the relative humidity of the outdoor air is larger than the first preset relative humidity. The air conditioner provided by the embodiment of the invention can reduce the frosting speed of a heat exchanger of an outdoor unit, so as to reduce frosting times of the air conditioner, prolong the time of heating operation, raise the continuity of the heating operation, and raise the users' comfortableness.
Description
Technical field
The invention belongs to art of refrigeration units, particularly relate to a kind of air-conditioner and control method thereof.
Background technology
When temperature is lower and air humidity is larger, the easy frosting of heat exchanger of air-conditioner outdoor unit, and the effect of current air-conditioning defrosting method is all undesirable.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art.For this reason, the invention provides a kind of air-conditioner.
The air-conditioner of embodiment of the present invention comprises compressor, checkout gear and controller.Described checkout gear is for gathering outdoor air relative humidity.Described controller is connected with described compressor and described checkout gear, and described controller is used for before described air-conditioner enters defrost pattern, judge whether described outdoor air relative humidity is greater than first and presets relative humidity and reduce the running frequency of described compressor when described outdoor air relative humidity is greater than the described first default relative humidity.
The air-conditioner of embodiment of the present invention is when outdoor air relative humidity is excessive, described controller controls the running frequency reducing described compressor, thus decreasing the circular flow of cold-producing medium in described air-conditioner cooling cycle system, the outdoor heat exchanger of described air-conditioner can not cause the too low frosting velocity that causes of the surface temperature of described outdoor heat exchanger too fast in heat transfer process.The air-conditioner of embodiment of the present invention can delay the frosting velocity of the heat exchanger of described air-conditioner, decrease the number of times of described air-conditioner defrost, extend the time that described air conditioner heat-production runs, thus improve the continuity of heating operation, improve the comfortableness of user.
In some embodiments, described air-conditioner comprises off-premises station, and described off-premises station comprises described compressor, and described checkout gear comprises humidity sensor.Described off-premises station is provided with air inlet, and described air inlet is located at by described humidity sensor.
In some embodiments, described checkout gear with the value of outdoor air relative humidity described in fixing frequency collection, described controller for the treatment of the value of the described outdoor air relative humidity in the scheduled time to obtain the mean value of described outdoor air relative humidity as described outside relative humidity.
In some embodiments, the described first default relative humidity is 60%-90%.
In some embodiments, the reduction amplitude of the running frequency of described compressor is 2-5Hz.
In some embodiments, judge when described controller is also for being less than or equal to the described first default relative humidity in described outdoor air relative humidity whether described outdoor air relative humidity is less than second and presets relative humidity and improve the running frequency of described compressor when described outdoor air relative humidity is less than the described second default relative humidity.
In some embodiments, the described second default relative humidity is less than 40%.
In some embodiments, the increase rate of the running frequency of described compressor is 2-5Hz.
The present invention also provides a kind of control method of air-conditioner, and the air-conditioner control method of embodiment of the present invention, comprising:
S1, detects outdoor air relative humidity;
S2, judges before described air-conditioner enters defrost pattern whether described outdoor air relative humidity is greater than first and presets relative humidity, if so, enters step S3; And
S3, reduces the running frequency of the compressor of described air-conditioner.
In some embodiments, described air-conditioner control method also comprises:
S4, if described outdoor air relative humidity is less than or equal to described second preset relative humidity, judges whether described outdoor air relative humidity is less than second and presets relative humidity, if so, enters step S5; And
S5, improves the running frequency of described compressor.
Additional aspect of the present invention and advantage will part provide from the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the high-level schematic functional block diagram of the air-conditioner of embodiment of the present invention.
Fig. 2 is the workflow schematic diagram of the air-conditioner of embodiment of the present invention.
Detailed description of the invention
Be described below in detail embodiments of the present invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise feature described in one or more.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection or can communication mutually; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
The invention provides a kind of air-conditioner, be explained below in conjunction with accompanying drawing.
Refer to Fig. 1 and Fig. 2, the air-conditioner 100 of embodiment of the present invention comprises checkout gear 10, controller 20 and off-premises station 30.Checkout gear 10 comprises humidity sensor 11, and humidity sensor 11 is for gathering outdoor air relative humidity RH.Controller 20 comprises judge module 21, and is connected with checkout gear 10.The outdoor air relative humidity RH that judge module 21 gathers for receiving humidity sensor 11, and judge that outdoor air relative humidity RH and first presets the relation of relative humidity A.Off-premises station 30 comprises compressor 31, and is connected with controller 20.When judge module 21 is for judging that before air-conditioner 100 enters defrost pattern outdoor air relative humidity RH is greater than the first default relative humidity A, controller 20 controls the running frequency reducing compressor 31.
When the air-conditioner 100 of embodiment of the present invention heats, the cold-producing medium of low-temp low-pressure is sucked by compressor 31 and is compressed into high temperature and high pressure gas.High temperature and high pressure gas enters indoor heat exchanger (not shown), and in indoor heat exchanger, the refrigerant gas exothermic condensation of HTHP becomes the liquid of middle temperature high pressure.Simultaneously indoor fan (not shown) makes air constantly enter indoor heat exchanger to carry out heat exchange, and the air of heating after heating is sent to indoor by air channel.The liquid of medium temperature and medium pressure becomes the liquid of low-temp low-pressure after throttling arrangement (not shown) reducing pressure by regulating flow, the liquid of the low-temp low-pressure refrigerant gas becoming low-temp low-pressure after evaporation that absorbs heat in outdoor heat exchanger 32 causes outdoor heat exchanger 32 surface temperature to decline, outdoor air when outdoor heat exchanger 32 is surperficial and outdoor heat exchanger 32 there is exchange heat.The refrigerant gas of low-temp low-pressure is again sucked by compressor 31 and compresses, and so circulates, reaches the object that indoor temperature is raised.
During use in winter air-conditioner 100; outdoor air is clammy; outdoor heat exchanger 32 heat absorption will cause the surperficial frosting of outdoor heat exchanger 32; the frost layer area on outdoor heat exchanger 32 surface and thickness excessive time; outdoor heat exchanger 32 cannot heat exchange normal with surrounding air, thus causes air-conditioner 100 normally to work.Experimentally and use experience, when outside relative humidity is greater than about 60%, air-conditioner 100 generally can be caused normally to work.So, air-conditioner 100 needs after running a period of time to enter defrost pattern, carries out defrost.
After air-conditioner 100 enters defrost pattern, air-conditioner 100 is in refrigerating state.The refrigerant gas of HTHP after compression is first delivered to outdoor heat exchanger 32, now outdoor heat exchanger 32 radiations heat energy towards periphery by compressor 31, and the frost layer on outdoor heat exchanger 32 surface is melted along with the temperature rising of outdoor heat exchanger 32.Cold-producing medium flows to indoor heat exchanger (not shown) after outdoor heat exchanger 32, and because the refrigerant gas temperature after outdoor heat exchanger 32 declines, the temperature of indoor heat exchanger (not shown) is also along with reduction.In order to avoid indoor temperature declines, when air-conditioner 100 is in defrost pattern, indoor fan stops to indoor air-supply, improves user's comfortableness.
When outdoor air relative humidity is excessive, controller 20 controls the running frequency reducing compressor 31, thus decrease the circular flow of cold-producing medium in air-conditioner 100 cooling cycle system, prevent the too low frosting velocity that causes of the surface temperature of outdoor heat exchanger 32 outdoor heat exchanger 32 in heat transfer process too fast.Air-conditioner 100 can delay the frosting velocity of the heat exchanger of off-premises station 30, decreases the number of times of air-conditioner 100 defrost, extends the time of heating operation, thus improves the continuity of heating operation, improve the comfortableness of user.
Particularly, humidity sensor 11 is made up of dew cell, conversion element, change-over circuit (not shown) etc., the relative humidity RH of dew cell direct feeling measuring chamber external environment, and transmission and relative humidity RH have and determine that the physical quantity signal of relation is to conversion element, conversion element is converted to the signal of telecommunication physical quantity signal and is transferred to change-over circuit, and the signal of telecommunication is transferred to controller 20 after the process such as conversion circuit amplification, modulation.Humidity sensor 11 (such as, 1 minute) within a period of time gathers multiple outdoor air relative humidity RH
1, RH
2, RH
3rH
nsignal.Multiple relative humidity signals that humidity sensor 11 collects RH that averages is transferred to controller 20, and whether what controller 20 judged outdoor environment according to the relative humidity mean value RH signal of input is conducive to frosting.
Compressor 31 is frequency-changeable compressor, controller 20 comprises frequency-variable controller (not shown), frequency-variable controller makes air-conditioner 100 realize infinite variable speed function by the operating frequency controlling compressor 31, and air-conditioner 100 can provide required heat automatically according to room availability.
In some embodiments, off-premises station 30 is provided with air inlet, and described air inlet is located at by humidity sensor 11.
Under air-conditioner 100 heats state, outdoor fan (not shown) gyrates and the air in off-premises station 30 is flowed.Air inlet is around outdoor heat exchanger 32, and the air inlet of outdoor air machine 30 outdoor flows into, and flows out after outdoor heat exchanger 32 from air outlet.
So, the accuracy of checkout gear 10 sensing chamber outer air relative humidity RH can be improved.
In some embodiments, judge whether described outdoor air relative humidity is less than second and presets relative humidity B and improve the running frequency of described compressor when described outdoor air relative humidity RH is less than the described second default relative humidity B by judge module 21 when controller 20 is also for being less than or equal to the described first default relative humidity A at described outdoor air relative humidity RH.
After the running frequency raising of compressor 31, compressor 31 accelerated service, refrigerant circulation speed in air-conditioning 100 refrigeration system is accelerated, add the internal circulating load of the cold-producing medium in air-conditioner 100 refrigeration system, thus accelerate air-conditioner 100 heat speed, improve the heating capacity of air-conditioner 100, and then improve the comfortableness of user.
In some embodiments, the described first default relative humidity A is 60%-90%; Described second presets relative humidity B is less than 40%.
So, the first default relative humidity A and second that can be different according to different environment sets presets relative humidity B, expands the range of applicability of air-conditioning.The such as climatic environment in area, North China and the climatic environment of South China have very large difference, can set the first different default relative humidity A and second preset relative humidity B according to the climatic environment of locality.
In some embodiment, the amplitude that compressor 31 running frequency improves or reduces is 2-5Hz.
So, the scope of application of air-conditioner 100 can be expanded.
The present invention also provides a kind of control method of air-conditioner 100.
Refer to Fig. 1 and Fig. 2, air-conditioner 100 control method of embodiment of the present invention, comprising:
S1, detects outdoor air relative humidity;
S2, judges before described air-conditioner 100 enters defrost pattern whether described outdoor air relative humidity RH is greater than first and presets relative humidity A, if so, enters step S3; And
S3, reduces the running frequency of the compressor 31 of described air-conditioner.
After the running frequency decline of compressor 31, compressor 31 runs slowly, and the cold-producing medium discharge capacity of compressor 31 reduces, and can reduce the internal circulating load of the cold-producing medium in air-conditioner 100 refrigeration system, prevent the temperature on outdoor heat exchanger 32 surface because of heat exchange too low, delay the frosting velocity of outdoor heat exchanger 32.
In some embodiments, described air-conditioner 100 control method also comprises:
S4, if described outdoor air relative humidity RH is less than or equal to described second preset relative humidity B, judges whether described outdoor air relative humidity RH is less than second and presets relative humidity B, if so, enters step S5; And
S5, improves the running frequency of described compressor 31.
Particularly, humidity sensor 11 starts to gather outdoor air relative humidity RH after air-conditioning heating start, and outdoor air relative humidity RH will be collected and be defeated by controller 20, controller 20 to the outdoor air relative humidity RH process of input, and judges that outdoor air relative humidity RH and first presets the magnitude relationship that relative humidity A and second presets relative humidity B.
It should be noted that, the running frequency of compressor 31 is not a fixed value, and running frequency can change along with the change of indoor temperature.
In some embodiments, the described first default relative humidity A is greater than the described second default relative humidity B.
So, guarantee that air-conditioner 100 accurately can judge whether outdoor environment is conducive to outdoor heat exchanger 32 frosting, avoid controller 20 to send the instruction of mistake.
The course of work of air-conditioner 100 is as follows: under the environment that temperature is lower, after air-conditioner 100 opens heating mode after starting shooting, outdoor heat exchanger 32 absorbs the heat of surrounding air, now outdoor heat exchanger 32 surface temperature because of heat exchange lower (such as, lower than 5 degrees Celsius), the easier frosting of outdoor heat exchanger 32.After air-conditioner 100 is started shooting, before air-conditioning enters defrost pattern, the humidity sensor 11 of checkout gear 10 starts the relative humidity RH gathering outdoor air, the relative humidity RH signal of collection is transferred to controller 20 by humidity sensor 11 after treatment, according to signal, controller 20 judges whether outdoor environment is conducive to outdoor heat exchanger 32 frosting.
If controller 20 detects that relative humidity RH is greater than first of setting and presets relative humidity A (such as, A=80%) time, illustrate that now outdoor environmental benefits is in outdoor heat exchanger 32 frosting, controller 20 controls the running frequency reducing compressor 31, and attenuating amplitude is 2-5Hz.After the running frequency decline of compressor 31, compressor 31 runs slowly, the discharge capacity of the cold-producing medium in compressor 31 reduces, the internal circulating load of cold-producing medium in air-conditioner 100 refrigeration system is reduced, thus the heat exchange efficiency of outdoor heat exchanger 32 can be improved, delay the frosting velocity of outdoor heat exchanger 32, what extend air-conditioning 100 heats the time.When outdoor heat exchanger 32 frosting, air-conditioner 100 enters defrost pattern, now the outdoor heat exchanger 32 of air-conditioner 100 towards periphery transferring heat cause frost layer to be melted, after air-conditioner 100 defrost completes, the relative humidity RH of checkout gear 10 sensing chamber's outer air again, so circulates.
If controller 20 detects that relative humidity RH is less than second of setting and presets relative humidity B (such as, B=40%) time, illustrate that now outdoor environment is unfavorable for outdoor heat exchanger 32 frosting, controller 20 controls the running frequency improving compressor 31, and increase rate is 2-5Hz.After the running frequency raising of compressor 31, compressor 31 Accelerating running, the discharge capacity of the cold-producing medium in compressor 31 increases, and can improve the heating capacity of air-conditioner 100, and indoor air themperature increases, and improves the comfortableness of user.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiment ", " exemplary embodiment ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with described embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the present invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (10)
1. an air-conditioner, is characterized in that, comprising:
Compressor;
Checkout gear, for gathering outdoor air relative humidity; And
The controller be connected with described compressor and described checkout gear, for judging before described air-conditioner enters defrost pattern whether described outdoor air relative humidity is greater than first and presets relative humidity and reduce the running frequency of described compressor when described outdoor air relative humidity is greater than the described first default relative humidity.
2. air-conditioner as claimed in claim 1, it is characterized in that, described air-conditioner comprises off-premises station, and described off-premises station comprises described compressor, and described checkout gear comprises humidity sensor; Described off-premises station is provided with air inlet, and described air inlet is located at by described humidity sensor.
3. air-conditioner as claimed in claim 1, its feature is being, described checkout gear with the value of outdoor air relative humidity described in fixing frequency collection, described controller for the treatment of the value of the described outdoor air relative humidity in the scheduled time to obtain the mean value of described outdoor air relative humidity as described outside relative humidity.
4. air-conditioner as claimed in claim 1, is characterized in that, the described first default relative humidity is 60%-90%.
5. air-conditioner as claimed in claim 1, it is characterized in that, the reduction amplitude of the running frequency of described compressor is 2-5Hz.
6. air-conditioner as claimed in claim 1, it is characterized in that, described controller is also for being less than or equal to the described first default relative humidity during in described outdoor air relative humidity, judging whether described outdoor air relative humidity is less than second and presets relative humidity and improve the running frequency of described compressor when described outdoor air relative humidity is less than the described second default relative humidity.
7. air-conditioner as claimed in claim 6, is characterized in that, described second presets relative humidity is less than 40%.
8. air-conditioner as claimed in claim 6, it is characterized in that, the increase rate of the running frequency of described compressor is 2-5Hz.
9. an air-conditioner control method, is characterized in that, comprising:
S1, detects outdoor air relative humidity;
S2, judges before described air-conditioner enters defrost pattern whether described outdoor air relative humidity is greater than first and presets relative humidity, if so, enters step S3; And
S3, reduces the running frequency of the compressor of described air-conditioner.
10. air-conditioner control method as claimed in claim 9, it is characterized in that, described air-conditioner control method also comprises:
S4, if described outdoor air relative humidity is less than or equal to described second preset relative humidity, judges whether described outdoor air relative humidity is less than second and presets relative humidity, if so, enters step S5; And
S5, improves the running frequency of described compressor.
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| CN105258295A (en) * | 2015-10-29 | 2016-01-20 | 广东美的制冷设备有限公司 | Anti-condensation control method and device of air conditioner |
| CN106196876A (en) * | 2016-07-18 | 2016-12-07 | 珠海格力电器股份有限公司 | The control method of a kind of cabinet humidity, control device and cabinet |
| CN107023961A (en) * | 2017-04-13 | 2017-08-08 | 青岛海尔空调器有限总公司 | A kind of air conditioner and control method |
| CN107084485A (en) * | 2017-04-13 | 2017-08-22 | 青岛海尔空调器有限总公司 | A kind of air conditioner and control method |
| CN108692424A (en) * | 2018-05-24 | 2018-10-23 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN108800439A (en) * | 2018-05-24 | 2018-11-13 | 青岛海尔空调器有限总公司 | air conditioner defrosting control method |
| CN109028463A (en) * | 2018-05-24 | 2018-12-18 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN109028462A (en) * | 2018-05-24 | 2018-12-18 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN112902407A (en) * | 2021-01-28 | 2021-06-04 | 四川长虹空调有限公司 | Method for controlling operation frequency of variable frequency air conditioner through outdoor humidity |
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| CN114370691A (en) * | 2022-01-27 | 2022-04-19 | 宁波奥克斯电气股份有限公司 | Control method of air conditioner and air conditioner |
| CN114413454A (en) * | 2021-12-09 | 2022-04-29 | 珠海格力电器股份有限公司 | Fuzzy algorithm-based air conditioner heating and frost suppression control method and system and air conditioner |
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