CN107328026B - Blower control method and device, air-conditioner outdoor unit - Google Patents

Blower control method and device, air-conditioner outdoor unit Download PDF

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Publication number
CN107328026B
CN107328026B CN201710637708.1A CN201710637708A CN107328026B CN 107328026 B CN107328026 B CN 107328026B CN 201710637708 A CN201710637708 A CN 201710637708A CN 107328026 B CN107328026 B CN 107328026B
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China
Prior art keywords
heat exchanger
temperature
fan
outlet temperature
frequency
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CN201710637708.1A
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Chinese (zh)
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CN107328026A (en
Inventor
董明珠
谭建明
苏玉海
李龙飞
余凯
刘群波
倪毅
傅英胜
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珠海格力电器股份有限公司
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Priority to CN201710637708.1A priority Critical patent/CN107328026B/en
Publication of CN107328026A publication Critical patent/CN107328026A/en
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Publication of CN107328026B publication Critical patent/CN107328026B/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The present invention discloses a kind of blower control method and device, air-conditioner outdoor unit.The blower control method includes: to obtain air-conditioning system pressure and external environment temperature;Air-conditioning system pressure and external environment temperature is made to meet predetermined condition by adjusting the first fan operation frequency;Make First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature equal by adjusting the second fan operation frequency.By the present invention in that the upper and lower heat exchanger of outdoor unit has identical heat transfer effect, the heat transfer effect of outdoor unit heat exchanger is improved;The invention enables heat exchanger uniform heat exchanges, reduce the invalid wasted work of motor, make blower more energy saving.

Description

Blower control method and device, air-conditioner outdoor unit

Technical field

The present invention relates to airconditioning control field, in particular to a kind of blower control method and device, air-conditioner outdoor unit.

Background technique

Side air-out two fans heat pump outdoor unit, the corresponding condenser of upper fan be upper condenser, lower blower is corresponding be under Condenser, refrigerant is when condenser radiates, and due to gravity, the cold medium flux on condenser top is than lower part under refrigeration mode Flow is big, and heating mode is then opposite.

When unit load is lower, the difference in flow condensed up and down then more seems obvious.The difference of flow keeps heat exchanger sharp It is substantially reduced with rate.

Summary of the invention

In view of the above technical problem, the present invention provides a kind of blower control methods and device, air-conditioner outdoor unit, make outdoor The upper and lower heat exchanger of machine has identical heat transfer effect, improves the heat transfer effect of outdoor unit heat exchanger.

According to an aspect of the present invention, a kind of blower control method is provided, comprising:

Obtain air-conditioning system pressure and external environment temperature;

Air-conditioning system pressure and external environment temperature is made to meet predetermined condition by adjusting the first fan operation frequency;

Make First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature phase by adjusting the second fan operation frequency Deng.

In one embodiment of the invention, it is described by adjusting the first fan operation frequency make air-conditioning system pressure and External environment temperature meets predetermined condition

Determine saturation temperature corresponding with the absolute pressure value of the air-conditioning system pressure;

The saturation temperature and external environment temperature difference is made to be in preset range by adjusting the first fan operation frequency It is interior.

In one embodiment of the invention, described by adjusting the second fan operation frequency First Heat Exchanger to be exported Temperature and the second heat exchanger outlet temperature is equal includes:

First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are obtained with predetermined time interval;

The second fan operation frequency is adjusted according to First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature.

In one embodiment of the invention, described by adjusting the second fan operation frequency First Heat Exchanger to be exported Temperature and the second heat exchanger outlet temperature are equal further include:

Preset frequency value, the first fan operation frequency initial value, adjustment are set by the second fan operation frequency initial value Any one of first fan operation frequency afterwards, execute later with predetermined time interval obtain First Heat Exchanger outlet temperature and The step of second heat exchanger outlet temperature.

In one embodiment of the invention, described according to First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature Second fan operation frequency is adjusted and includes:

Judge whether First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal;

If First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are unequal, temperature is exported according to First Heat Exchanger The difference of degree and the second heat exchanger outlet temperature determines corresponding second blower frequency adjustment, and according to the second blower frequency tune Whole amount is adjusted the second fan operation frequency;

If First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal, the second fan operation frequency is kept not Become.

In one embodiment of the invention, in the case where air-conditioning is in refrigeration mode, the air-conditioning system pressure is Air-conditioning system high pressure, first blower are upper fan, and second blower is lower blower, the First Heat Exchanger outlet temperature For upper condensator outlet temperature, second heat exchanger outlet temperature is lower condensator outlet temperature.

In one embodiment of the invention, it is described by adjusting the first fan operation frequency make air-conditioning system pressure and External environment temperature meets predetermined condition

Determine condensation saturation temperature corresponding with the absolute pressure value of the air-conditioning system high pressure;

To condense saturation temperature by adjusting upper fan running frequency and external environment temperature difference is in preset range.

In one embodiment of the invention, described to condense saturation temperature and outer by adjusting upper fan running frequency The difference of environment temperature is in preset range

If condensing saturation temperature and external environment temperature difference being less than first predetermined value, upper fan running frequency is reduced;

If condensing saturation temperature and external environment temperature difference being greater than second predetermined value, upper fan running frequency is promoted;

If condensing saturation temperature and external environment temperature difference being between first predetermined value and second predetermined value, in holding Fan operation frequency is constant.

In one embodiment of the invention, in the case where air-conditioning is in heating mode, the air-conditioning system pressure is Air-conditioning system low pressure, first blower are lower blower, and second blower is upper fan, the First Heat Exchanger outlet temperature For upper evaporator outlet temperature, second heat exchanger outlet temperature is lower evaporator outlet temperature.

In one embodiment of the invention, it is described by adjusting the first fan operation frequency make air-conditioning system pressure and External environment temperature meets predetermined condition

Determine evaporation saturation temperature corresponding with the absolute pressure value of the air-conditioning system low pressure;

To evaporate saturation temperature by adjusting lower blower running frequency and external environment temperature difference is in preset range.

In one embodiment of the invention, described to evaporate saturation temperature and outer by adjusting lower blower running frequency The difference of environment temperature is in preset range

If the difference of external environment temperature and evaporation saturation temperature promotes lower fan operation frequency less than the first temperature predetermined value Rate;

If the difference of external environment temperature and evaporation saturation temperature is greater than second temperature predetermined value, lower fan operation frequency is reduced Rate;

If external environment temperature and the difference for evaporating saturation temperature are between the first temperature predetermined value and second temperature predetermined value, Then keep lower blower running frequency constant.

According to another aspect of the present invention, a kind of fan controller is provided, comprising:

Pressure sensor, for obtaining air-conditioning system pressure;

First temperature sensor, for obtaining external environment temperature;

Controller, it is pre- for meeting air-conditioning system pressure and external environment temperature by adjusting the first fan operation frequency Fixed condition;And make First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature phase by adjusting the second fan operation frequency Deng.

In one embodiment of the invention, controller is for the determining absolute pressure value phase with the air-conditioning system pressure Corresponding saturation temperature;The saturation temperature and external environment temperature difference is made to be in pre- by adjusting the first fan operation frequency Determine in range.

In one embodiment of the invention, the fan controller further include:

Second temperature sensor, for obtaining First Heat Exchanger outlet temperature with predetermined time interval;

Third temperature sensor, for obtaining the second heat exchanger outlet temperature with predetermined time interval;

Controller is used for according to First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature to the second fan operation frequency Rate is adjusted.

In one embodiment of the invention, controller is used to set the second fan operation frequency initial value to predetermined frequency Any one of rate value, the first fan operation frequency initial value, the first fan operation frequency adjusted indicate the second temperature later It spends sensor and third temperature sensor executes and obtains First Heat Exchanger outlet temperature and the second heat exchanger with predetermined time interval The operation of outlet temperature.

In one embodiment of the invention, controller is for judging that First Heat Exchanger outlet temperature and the second heat exchanger go out Whether mouth temperature is equal;Under First Heat Exchanger outlet temperature and the unequal situation of the second heat exchanger outlet temperature, according to The difference of one heat exchanger outlet temperature and the second heat exchanger outlet temperature determines corresponding second blower frequency adjustment, and according to Second blower frequency adjustment is adjusted the second fan operation frequency;In First Heat Exchanger outlet temperature and the second heat exchanger In the case that outlet temperature is equal, keep the second fan operation frequency constant.

In one embodiment of the invention, in the case where air-conditioning is in refrigeration mode,

The air-conditioning system pressure is air-conditioning system high pressure;The pressure sensor is high pressure sensor, for obtaining sky Adjusting system high pressure;

First blower is upper fan, and second blower is lower blower;

The second temperature sensor includes upper condensator outlet temperature sensor, for being obtained with predetermined time interval Condensator outlet temperature;The First Heat Exchanger outlet temperature is upper condensator outlet temperature;

The third temperature sensor includes lower condensator outlet temperature sensor, for being obtained down with predetermined time interval Condensator outlet temperature;Second heat exchanger outlet temperature is lower condensator outlet temperature.

In one embodiment of the invention, the controller is for the determining absolute pressure with the air-conditioning system high pressure It is worth corresponding condensation saturation temperature;And by adjusting upper fan running frequency to condense saturation temperature and external environment temperature it Difference is in preset range.

In one embodiment of the invention, the controller is used for small in condensation saturation temperature and external environment temperature difference In the case where first predetermined value, upper fan running frequency is reduced;It is greater than the in condensation saturation temperature and external environment temperature difference In the case where two predetermined values, upper fan running frequency is promoted;It is pre- that first is in condensation saturation temperature and external environment temperature difference In the case where between definite value and second predetermined value, keep upper fan running frequency constant.

In one embodiment of the invention, in the case where air-conditioning is in heating mode,

The air-conditioning system pressure is air-conditioning system low pressure, and the pressure sensor is low pressure sensor, for obtaining sky Adjusting system low pressure;

First blower is lower blower, and second blower is upper fan;

The second temperature sensor includes upper evaporator outlet temperature sensor, for being obtained with predetermined time interval Evaporator outlet temperature;The First Heat Exchanger outlet temperature is upper evaporator outlet temperature;

The third temperature sensor includes lower evaporator outlet temperature sensor, for being obtained down with predetermined time interval Evaporator outlet temperature;Second heat exchanger outlet temperature is lower evaporator outlet temperature.

In one embodiment of the invention, the controller is for the determining absolute pressure with the air-conditioning system low pressure It is worth corresponding evaporation saturation temperature;And by adjusting lower blower running frequency to evaporate saturation temperature and external environment temperature it Difference is in preset range.

In one embodiment of the invention, the controller is used for small in the difference of outer environment temperature and evaporation saturation temperature In the case where the first temperature predetermined value, lower blower running frequency is promoted;It is big in the difference of outer environment temperature and evaporation saturation temperature In the case where second temperature predetermined value, lower blower running frequency is reduced;At the difference of outer environment temperature and evaporation saturation temperature In the case where between the first temperature predetermined value and second temperature predetermined value, keep lower blower running frequency constant.

According to another aspect of the present invention, a kind of fan controller is provided, the fan controller is for executing State method and step described in any embodiment.

According to another aspect of the present invention, a kind of air-conditioner outdoor unit is provided, including blower described in any of the above-described embodiment Control device.

By the present invention in that the upper and lower heat exchanger of outdoor unit has identical heat transfer effect, changing for outdoor unit heat exchanger is improved Thermal effect;The invention enables heat exchanger uniform heat exchanges, reduce the invalid wasted work of motor, make blower more energy saving.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.

Fig. 1 is the schematic diagram of outer machine heat exchanger one embodiment of air-conditioner outdoor unit of the present invention.

Fig. 2 is the schematic diagram of blower control method first embodiment of the present invention.

Fig. 3 is the schematic diagram of blower control method second embodiment of the present invention.

Fig. 4 is the schematic diagram of blower control method 3rd embodiment of the present invention.

Fig. 5 is the schematic diagram of the 5th embodiment of blower control method of the present invention.

Fig. 6 is the schematic diagram of fan controller first embodiment of the present invention.

Fig. 7 is the schematic diagram of fan controller second embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below Description only actually at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or make Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Under every other embodiment obtained, shall fall within the protection scope of the present invention.

Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments It is not limited the scope of the invention up to formula and numerical value.

Simultaneously, it should be appreciated that for ease of description, the size of various pieces shown in attached drawing is not according to reality Proportionate relationship draw.

Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable In the case of, the technology, method and apparatus should be considered as authorizing part of specification.

It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain item exists It is defined in one attached drawing, then in subsequent attached drawing does not need that it is further discussed.

Fig. 1 is the schematic diagram of outer machine heat exchanger one embodiment of air-conditioner outdoor unit of the present invention.It is in a chiller mode below Example, the cold medium flux different problems of heat exchanger up and down of external machine heat exchanger are illustrated.

In refrigeration mode, outer machine heat exchanger exchanges heat as condenser, and refrigerant flow direction is from tracheae to liquid pipe stream It is dynamic.Heat exchanger exchanges heat as upper condenser on outer machine, and heat exchanger exchanges heat as lower condenser under outer machine.

As shown in Figure 1, upper condensator outlet pressure P1, lower condensator outlet pressure P2 meet formula due to gravity (1)。

P2-P1=ρ gh=(P0-P1)-(P0-P2) > 0 (1)

Wherein, ρ is refrigerant density, and g is acceleration of gravity, and h is the difference in height of upper condensator outlet and lower condensator outlet, P0For the pressure of upper condenser inlet and lower condenser inlet.

Due to lower condensator outlet pressure P2Greater than upper condensator outlet pressure P1, then lower condensator outlet pressure is greater than Upper condensator outlet pressure, therefore, lower condensator outlet are greater than upper condensator outlet to the resistance of refrigerant to the resistance of refrigerant, from And make the flow of condenser will be greater than the flow of lower condenser.

If upper fan (upper condenser fan), the revolving speed of lower blower (lower condenser fan) are identical, then, small cold of flow The outlet port temperature T of condenser (lower condenser)2The outlet port temperature T of the condenser (upper condenser) big compared with flow1Height, i.e., T1< T2.Illustrate that upper and lower condenser heat exchange is uneven, superheating phenomenon occurs in lower condenser.

Therefore the present invention provides a kind of blower control method and devices, can make T by that will reduce lower rotation speed of fan1 =T2

Blower control method and device of the invention are illustrated below by specific embodiment.

Fig. 2 is the schematic diagram of blower control method first embodiment of the present invention.Preferably, the present embodiment can be by wind of the present invention Machine control device executes.Method includes the following steps:

Step 21, air-conditioning system pressure and external environment temperature are obtained.

Step 22, air-conditioning system pressure and external environment temperature is made to meet predetermined item by adjusting the first fan operation frequency Part.

In one embodiment of the invention, step 22 may include: step 221, the determining and air-conditioning system pressure The corresponding saturation temperature of absolute pressure value.Step 222, make the saturation temperature by adjusting the first fan operation frequency It is in preset range with external environment temperature difference.The above embodiment of the present invention gives specifically how to determine suitable first wind The method of machine running frequency adjusts the second fan operation frequency according to the first fan operation frequency in order to subsequent.

Step 23, make First Heat Exchanger outlet temperature and the second heat exchanger exit by adjusting the second fan operation frequency Temperature is equal.

In one embodiment of the invention, step 23 may include:

Step 231, the second fan operation frequency initial value is determined.

In one embodiment of the invention, step 231 may include: to set the second fan operation frequency initial value to Any one of preset frequency value, the first fan operation frequency initial value, the first fan operation frequency adjusted.

Step 232, First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are obtained with predetermined time interval.

Step 233, according to First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature to the second fan operation frequency It is adjusted.The above embodiment of the present invention give it is specific how first fan operation frequency the first fan operation frequency base On plinth, the second fan operation frequency is adjusted, so that First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature phase Deng.

In one embodiment of the invention, step 233 may include:

Step 2331, judge whether First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal.

Step 2332, it if First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are unequal, is changed according to first Hot device outlet temperature and the difference of the second heat exchanger outlet temperature determine corresponding second blower frequency adjustment, and according to second Blower frequency adjustment is adjusted the second fan operation frequency.

Step 2333, if First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal, the second blower is kept Running frequency is constant.

The above embodiment of the present invention is changed on the basis of first fan operation frequency the first fan operation frequency according to first Hot device outlet temperature and the difference of the second heat exchanger outlet temperature determine adjustment amount, are adjusted to the second fan operation frequency, So that First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal.

It, can be by adjusting the operation frequency of upper and lower blower based on the blower control method that the above embodiment of the present invention provides Rate, so that the upper and lower heat exchanger of outdoor unit be made to have identical heat transfer effect, improves outdoor unit and changes to adjust upper and lower rotation speed of fan The heat transfer effect of hot device.The above embodiment of the present invention makes heat exchanger uniform heat exchange, reduces the invalid wasted work of motor, allows blower It is more energy saving.

Fig. 3 is the schematic diagram of blower control method second embodiment of the present invention.Preferably, the present embodiment can be by wind of the present invention Machine control device executes.Method includes the following steps:

Step 31, judge that air-conditioning is in refrigeration mode or heating mode.

Step 32, if air-conditioning is in refrigeration mode, corresponding air-blower control is carried out according to Fig. 2 embodiment.Wherein, described Air-conditioning system pressure is air-conditioning system high pressure, and first blower is upper fan, and second blower is lower blower, such as Fig. 1 institute Show, the First Heat Exchanger outlet temperature is upper condensator outlet temperature T1, second heat exchanger outlet temperature is lower condensation Device outlet temperature T2

Step 33, if air-conditioning is in heating mode, corresponding air-blower control is carried out according to Fig. 2 embodiment.Wherein, described Air-conditioning system pressure is air-conditioning system low pressure, and first blower is lower blower, and second blower is upper fan, such as Fig. 1 institute Show, the First Heat Exchanger outlet temperature is upper evaporator outlet temperature T01, second heat exchanger outlet temperature is lower evaporation Device outlet temperature T02

The control to air conditioner rotation speed of fan may be implemented in the above embodiment of the present invention, air-conditioning it is in refrigeration mode or It, can be by adjusting the running frequency of upper and lower blower, to adjust upper and lower rotation speed of fan, to make outdoor unit under heating mode Upper and lower heat exchanger has identical heat transfer effect, improves the heat transfer effect of outdoor unit heat exchanger.The above embodiment of the present invention makes Heat exchanger uniform heat exchange reduces the invalid wasted work of motor, makes blower more energy saving.

Fig. 4 is the schematic diagram of blower control method 3rd embodiment of the present invention.Preferably, the present embodiment can be by wind of the present invention Machine control device executes.As shown in figure 4, the step 32 of Fig. 3 embodiment can specifically include following steps:

Step 321, in the case where air-conditioning is in refrigeration mode, air-conditioning system high pressure is obtained (that is, pressure at expulsion, condensation Pressure) and external environment temperature t.

Step 322, condensation saturation temperature G corresponding with the absolute pressure value of the air-conditioning system high pressure is determined.

Step 323, to condense at the difference of saturation temperature G and external environment temperature t by adjusting upper fan running frequency S1 In in preset range.

In one particular embodiment of the present invention, step 323 may include:

Step 3231, if the difference of condensation saturation temperature G and external environment temperature t is less than first predetermined value t1, that is, G-t < t1, Then reduce upper fan running frequency S1.

Step 3232, if the difference of condensation saturation temperature G and external environment temperature t is greater than second predetermined value t2, that is, G-t > t2, Then promote upper fan running frequency S1, wherein second predetermined value t2 is greater than first predetermined value t1, and t1, t2 are according to experimental test Efficiency (such as efficiency is greater than 3) obtains.

Step 3233, if the difference of condensation saturation temperature G and external environment temperature t is in first predetermined value t1 and second predetermined value Between t2, that is, t1 < G-t < t2 then keeps upper fan running frequency S1 constant.

Step 324, make upper condensator outlet temperature T by adjusting lower blower running frequency S21With lower condensator outlet Temperature T2It is equal.

In one particular embodiment of the present invention, step 324 may include:

Step 3241, by lower blower running frequency S2 be set as preset frequency value, upper fan running frequency S1 initial value, Any one of upper fan running frequency S1 adjusted.

Step 3242, upper condensator outlet temperature T is obtained with predetermined time interval1With lower condensator outlet temperature T2

In a preferred embodiment of the invention, predetermined time interval is Z minutes.

Step 3243, condensator outlet temperature T in judgement1With lower condensator outlet temperature T2It is whether equal.

Step 3244, if upper condensator outlet temperature T1With lower condensator outlet temperature T2It is unequal, then according to lower condenser Outlet temperature T2With upper condensator outlet temperature T1Difference DELTA T determine corresponding leeward unit frequency adjustment amount, and according to lower blower Frequency adjustment is adjusted lower blower running frequency S2, executes step 3242 later.

In a preferred embodiment of the invention, the difference DELTA currently calculated can be utilized with look-up table in step 3244 T inquires the mapping table of scheduled Δ T Yu leeward unit frequency adjustment amount, under determining corresponding to the difference DELTA T currently calculated Blower frequency adjustment.

Step 3245, if upper condensator outlet temperature T1With lower condensator outlet temperature T2It is equal, then keep lower fan operation Frequency S2 is constant.

The above embodiment of the present invention may be implemented that the control of single cold rotating speed of air conditioner fan also may be implemented to air conditioner The control of rotation speed of fan when in refrigeration mode, specifically can be upper and lower to adjust by adjusting the running frequency of upper and lower blower Rotation speed of fan improves the heat exchange effect of outdoor unit heat exchanger so that the upper and lower heat exchanger of outdoor unit be made to have identical heat transfer effect Fruit.The above embodiment of the present invention makes heat exchanger uniform heat exchange, reduces the invalid wasted work of motor, makes blower more energy saving.

Fig. 5 is the schematic diagram of the 5th embodiment of blower control method of the present invention.Preferably, the present embodiment can be by wind of the present invention Machine control device executes.The control to single hot rotating speed of air conditioner fan may be implemented in the above embodiment of the present invention, also may be implemented pair Air conditioner is in the control of rotation speed of fan under heating mode.

As shown in Figure 1, outer machine heat exchanger exchanges heat as evaporator in heating mode, refrigerant flow direction is from liquid Pipe is flowed to tracheae.Heat exchanger exchanges heat as upper evaporator on outer machine, and heat exchanger is changed as lower evaporator under outer machine Heat.

As shown in Figure 1, upper evaporator inlet pressure P1, lower evaporator inlet pressure P2 meet formula due to gravity (1)。

P2-P1=ρ gh=(P0-P1)-(P0-P2) > 0 (1)

Wherein, ρ is refrigerant density, and g is acceleration of gravity, and h is the difference in height of upper evaporator inlet and lower evaporator inlet, P0For the pressure of upper evaporator outlet and lower evaporator outlet.

Due to lower evaporator inlet pressure P2Greater than upper evaporator inlet pressure P1, then lower evaporator inlet pressure is greater than Upper evaporator inlet pressure, therefore, lower evaporator inlet are greater than upper evaporator inlet to the power of refrigerant to the power of refrigerant, from And make the flow of lower evaporator will be greater than the flow of upper evaporator.

If upper fan (upper evaporator fan), the revolving speed of lower blower (lower evaporator fan) are identical, then, small cold of flow The outlet port temperature T of condenser (upper evaporator)01The outlet port temperature T of the condenser (lower evaporator) big compared with flow02Height, That is T02< T01.Illustrate that upper and lower evaporator heat exchange is uneven, superheating phenomenon occurs in upper evaporator.

Therefore the present invention can reduce upper fan revolving speed, make T by step 3302=T01

In one embodiment of the invention, as shown in figure 5, the step 33 of Fig. 3 embodiment can specifically include following step It is rapid:

Step 331, in the case where air-conditioning is in heating mode, air-conditioning system low pressure is obtained (that is, pressure of inspiration(Pi), evaporation Pressure) and external environment temperature t.

Step 332, evaporation saturation temperature D corresponding with the absolute pressure value of the air-conditioning system low pressure is determined.

Step 333, at the difference that external environment temperature t and evaporation saturation temperature D are made by adjusting lower blower running frequency S2 In in preset range.

In one particular embodiment of the present invention, step 333 may include:

Step 3331, if the difference of external environment temperature t and evaporation saturation temperature D are less than the first temperature predetermined value t3, that is, t-D < t3 then promotes lower blower running frequency S2.

Step 3332, if the difference of external environment temperature t and evaporation saturation temperature D are greater than second temperature predetermined value t4, that is, t-D > T4 then promotes lower blower running frequency S2, wherein second temperature predetermined value t4 is greater than the first temperature predetermined value t3, and t3, t4 are roots It is obtained according to experimental test efficiency (such as efficiency is greater than 3).

Step 3333, if the difference of external environment temperature t and evaporation saturation temperature D are in the temperature of the first temperature predetermined value t3 and second It spends between predetermined value t4, that is, t3 < t-D < t4 then keeps lower blower running frequency S2 constant.

Step 334, make upper evaporator outlet temperature T by adjusting upper fan running frequency S101With lower evaporator outlet Temperature T02It is equal.

In one particular embodiment of the present invention, step 334 may include:

Step 3341, by upper fan running frequency S1 be set as preset frequency value, lower blower running frequency S2 initial value, Any one of lower blower running frequency S2 adjusted.

Step 3342, upper evaporator outlet temperature T is obtained with predetermined time interval01With lower evaporator outlet temperature T02

In a preferred embodiment of the invention, predetermined time interval is Z minutes.

Step 3343, evaporator outlet temperature T in judgement01With lower evaporator outlet temperature T02It is whether equal.

Step 3344, if upper evaporator outlet temperature T01With lower evaporator outlet temperature T02It is unequal, then according to upper evaporation Device outlet temperature T01With lower evaporator outlet temperature T02Difference DELTA T0Determine corresponding upper fan frequency adjustment, and according to upper Blower frequency adjustment is adjusted upper fan running frequency S1, executes step 3342 later.

In a preferred embodiment of the invention, the difference DELTA currently calculated can be utilized with look-up table in step 3344 T0, inquire scheduled Δ T0With the mapping table of upper fan frequency adjustment, the difference DELTA T currently calculated is determined0Corresponding Upper fan frequency adjustment.

Step 3345, if upper condensator outlet temperature T1With lower condensator outlet temperature T2It is equal, then keep upper fan to run Frequency S1 is constant.

The control to single hot rotating speed of air conditioner fan may be implemented in the present invention, also may be implemented to be in air conditioner heating mould The control of rotation speed of fan when formula, specifically can by adjusting the running frequency of upper and lower blower, to adjust upper and lower rotation speed of fan, from And the upper and lower heat exchanger of outdoor unit is made to have identical heat transfer effect, improve the heat transfer effect of outdoor unit heat exchanger.The present invention is above-mentioned Embodiment makes heat exchanger uniform heat exchange, reduces the invalid wasted work of motor, makes blower more energy saving.

Fig. 6 is the schematic diagram of fan controller first embodiment of the present invention.As shown in fig. 6, the fan controller Including pressure sensor 61, the first temperature sensor 62 and controller 63, in which:

Pressure sensor 61, for obtaining air-conditioning system pressure.

First temperature sensor 62, for obtaining external environment temperature t.

Controller 63, for making air-conditioning system pressure and external environment temperature t full by adjusting the first fan operation frequency Sufficient predetermined condition;And make First Heat Exchanger outlet temperature and the second heat exchanger exit temperature by adjusting the second fan operation frequency It spends equal.

In one embodiment of the invention, controller 63 is specifically used for the determining absolute pressure with the air-conditioning system pressure The corresponding saturation temperature of force value;By adjusting the first fan operation frequency make the saturation temperature and external environment temperature t it Difference is in preset range.

It, can be by adjusting the operation frequency of upper and lower blower based on the fan controller that the above embodiment of the present invention provides Rate, so that the upper and lower heat exchanger of outdoor unit be made to have identical heat transfer effect, improves outdoor unit and changes to adjust upper and lower rotation speed of fan The heat transfer effect of hot device.The above embodiment of the present invention makes heat exchanger uniform heat exchange, reduces the invalid wasted work of motor, allows blower It is more energy saving.

Fig. 7 is the schematic diagram of fan controller second embodiment of the present invention.Compared with embodiment illustrated in fig. 6, in Fig. 7 institute Show in embodiment, the fan controller can also include second temperature sensor 64 and third temperature sensor 65, in which:

Second temperature sensor 64, for obtaining First Heat Exchanger outlet temperature with predetermined time interval.

Third temperature sensor 65, for obtaining the second heat exchanger outlet temperature with predetermined time interval.

Controller 63 is used for according to First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature to the second fan operation Frequency is adjusted.

In one embodiment of the invention, controller 63 specifically can be used for setting the second fan operation frequency initial value It is set to any one of preset frequency value, the first fan operation frequency initial value, the first fan operation frequency adjusted, later It indicates that second temperature sensor 64 and third temperature sensor 65 execute and First Heat Exchanger outlet temperature is obtained with predetermined time interval The operation of degree and the second heat exchanger outlet temperature.

In one embodiment of the invention, controller 63 specifically can be used for judging First Heat Exchanger outlet temperature and the Whether two heat exchanger outlet temperatures are equal;In First Heat Exchanger outlet temperature and the unequal situation of the second heat exchanger outlet temperature Under, determine that corresponding second blower frequency adjusts according to the difference of First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature Amount, and the second fan operation frequency is adjusted according to the second blower frequency adjustment;In First Heat Exchanger outlet temperature and In the case that second heat exchanger outlet temperature is equal, keep the second fan operation frequency constant.

First specific example

In the case where air-conditioning is in refrigeration mode, the air-conditioning system pressure is air-conditioning system high pressure;The pressure passes Sensor 61 is high pressure sensor, for obtaining air-conditioning system high pressure.

First blower is upper fan, and second blower is lower blower.

As shown in Figure 1, the second temperature sensor 64 includes upper condensator outlet temperature sensor, for pre- timing Between condensator outlet temperature T in interval acquiring1;The First Heat Exchanger outlet temperature is upper condensator outlet temperature.

The third temperature sensor 65 includes lower condensator outlet temperature sensor, for being obtained with predetermined time interval Lower condensator outlet temperature T2;Second heat exchanger outlet temperature is lower condensator outlet temperature.

In one embodiment of the invention, the controller 63 is for the determining absolute pressure with the air-conditioning system high pressure The corresponding condensation saturation temperature G of force value;And make to condense saturation temperature G and external environment by adjusting upper fan running frequency S1 The difference of temperature t is in preset range.

In one embodiment of the invention, the controller 63 be used for condensation saturation temperature G and external environment temperature t it In the case that difference is less than first predetermined value t1, upper fan running frequency S1 is reduced;In condensation saturation temperature G and external environment temperature t Difference be greater than second predetermined value t2 in the case where, promoted upper fan running frequency S1;In condensation saturation temperature G and external environment temperature In the case that the difference of t is between first predetermined value t1 and second predetermined value t2, keep upper fan running frequency S1 constant.

The above embodiment of the present invention may be implemented that the control of single cold rotating speed of air conditioner fan also may be implemented to air conditioner The control of rotation speed of fan when in refrigeration mode, specifically can be upper and lower to adjust by adjusting the running frequency of upper and lower blower Rotation speed of fan improves the heat exchange effect of outdoor unit heat exchanger so that the upper and lower heat exchanger of outdoor unit be made to have identical heat transfer effect Fruit.The above embodiment of the present invention makes heat exchanger uniform heat exchange, reduces the invalid wasted work of motor, makes blower more energy saving.

Second specific example

In the case where air-conditioning is in heating mode, the air-conditioning system pressure is air-conditioning system low pressure, and the pressure passes Sensor 61 is low pressure sensor, for obtaining air-conditioning system low pressure.

First blower is lower blower, and second blower is upper fan.

The second temperature sensor 64 includes upper evaporator outlet temperature sensor, for being obtained with predetermined time interval Upper evaporator outlet temperature;The First Heat Exchanger outlet temperature is upper evaporator outlet temperature.

The third temperature sensor 65 includes lower evaporator outlet temperature sensor, for being obtained with predetermined time interval Lower evaporator outlet temperature;Second heat exchanger outlet temperature is lower evaporator outlet temperature.

In one embodiment of the invention, the controller 63 is for the determining absolute pressure with the air-conditioning system low pressure The corresponding evaporation saturation temperature of force value;And make to evaporate saturation temperature and external environment temperature by adjusting lower blower running frequency The difference of t is in preset range.

In one embodiment of the invention, the controller 63 be used for outer environment temperature t and evaporation saturation temperature it In the case that difference is less than the first temperature predetermined value t3, lower blower running frequency is promoted;In outer environment temperature t and evaporation saturation temperature Difference be greater than second temperature predetermined value in the case where, reduce lower blower running frequency;In outer environment temperature t and evaporation saturation temperature Difference be between the first temperature predetermined value t3 and second temperature predetermined value in the case where, keep lower blower running frequency constant.

The control to single hot rotating speed of air conditioner fan may be implemented in the present invention, also may be implemented to be in air conditioner heating mould The control of rotation speed of fan when formula, specifically can by adjusting the running frequency of upper and lower blower, to adjust upper and lower rotation speed of fan, from And the upper and lower heat exchanger of outdoor unit is made to have identical heat transfer effect, improve the heat transfer effect of outdoor unit heat exchanger.The present invention is above-mentioned Embodiment makes heat exchanger uniform heat exchange, reduces the invalid wasted work of motor, makes blower more energy saving.

According to another aspect of the present invention, a kind of fan controller is provided, the fan controller is for executing State method and step described in any embodiment.

It, can be by adjusting the operation frequency of upper and lower blower based on the fan controller that the above embodiment of the present invention provides Rate, so that the upper and lower heat exchanger of outdoor unit be made to have identical heat transfer effect, improves outdoor unit and changes to adjust upper and lower rotation speed of fan The heat transfer effect of hot device.The above embodiment of the present invention makes heat exchanger uniform heat exchange, reduces the invalid wasted work of motor, allows blower It is more energy saving.

According to another aspect of the present invention, a kind of air-conditioner outdoor unit is provided, including blower described in any of the above-described embodiment Control device.

Based on the outdoor unit that the above embodiment of the present invention provides, upper and lower blower can be adjusted by fan controller Running frequency, so that the upper and lower heat exchanger of outdoor unit be made to have identical heat transfer effect, improves room to adjust upper and lower rotation speed of fan The heat transfer effect of outer machine heat exchanger.The above embodiment of the present invention makes heat exchanger uniform heat exchange, reduces the invalid wasted work of motor, Make blower more energy saving.

Controller described above can be implemented as general processor for executing function described herein, can Programmed logic controller (PLC), digital signal processor (DSP), specific integrated circuit (ASIC), field programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware components or it is any It is appropriately combined.

So far, the present invention is described in detail.In order to avoid covering design of the invention, it is public that this field institute is not described The some details known.Those skilled in the art as described above, completely it can be appreciated how implementing technology disclosed herein Scheme.

Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..

Description of the invention is given for the purpose of illustration and description, and is not exhaustively or will be of the invention It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches It states embodiment and is to more preferably illustrate the principle of the present invention and practical application, and those skilled in the art is enable to manage The solution present invention is to design various embodiments suitable for specific applications with various modifications.

Claims (32)

1. a kind of blower control method characterized by comprising
Obtain air-conditioning system pressure and external environment temperature;
Air-conditioning system pressure and external environment temperature is made to meet predetermined condition by adjusting the first fan operation frequency;
Make First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature equal by adjusting the second fan operation frequency;
Wherein, in the case where air-conditioning is in refrigeration mode, first blower is upper condenser fan, and second blower is Lower condenser fan, the First Heat Exchanger outlet temperature are upper condensator outlet temperature, second heat exchanger outlet temperature For lower condensator outlet temperature.
2. blower control method according to claim 1, which is characterized in that described by adjusting the first fan operation frequency So that air-conditioning system pressure and external environment temperature meet predetermined condition includes:
Determine saturation temperature corresponding with the absolute pressure value of the air-conditioning system pressure;
By adjusting the first fan operation frequency the saturation temperature and external environment temperature difference are in preset range.
3. blower control method according to claim 1, which is characterized in that described by adjusting the second fan operation frequency So that First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature is equal includes:
First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are obtained with predetermined time interval;
The second fan operation frequency is adjusted according to First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature.
4. blower control method according to claim 3, which is characterized in that described by adjusting the second fan operation frequency So that First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal further include:
Preset frequency value, the first fan operation frequency initial value, adjusted is set by the second fan operation frequency initial value Any one of first fan operation frequency executes obtain First Heat Exchanger outlet temperature and second with predetermined time interval later The step of heat exchanger outlet temperature.
5. blower control method according to claim 3, which is characterized in that it is described according to First Heat Exchanger outlet temperature and Second heat exchanger outlet temperature is adjusted the second fan operation frequency
Judge whether First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal;
If First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are unequal, according to First Heat Exchanger outlet temperature and The difference of second heat exchanger outlet temperature determines corresponding second blower frequency adjustment, and according to the second blower frequency adjustment Second fan operation frequency is adjusted;
If First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal, keep the second fan operation frequency constant.
6. blower control method according to any one of claims 1-5, which is characterized in that
In the case where air-conditioning is in refrigeration mode, the air-conditioning system pressure is air-conditioning system high pressure.
7. blower control method according to claim 6, which is characterized in that described by adjusting the first fan operation frequency So that air-conditioning system pressure and external environment temperature meet predetermined condition includes:
Determine condensation saturation temperature corresponding with the absolute pressure value of the air-conditioning system high pressure;
To condense saturation temperature by adjusting upper condenser fan running frequency and external environment temperature difference is in preset range It is interior.
8. blower control method according to claim 7, which is characterized in that described by adjusting the operation of upper condenser fan Frequency to condense saturation temperature and external environment temperature difference is in preset range and includes:
If condensing saturation temperature and external environment temperature difference being less than first predetermined value, condenser fan running frequency in reduction;
If condensing saturation temperature and external environment temperature difference being greater than second predetermined value, condenser fan running frequency in promotion;
If condensing saturation temperature and external environment temperature difference being between first predetermined value and second predetermined value, keep condensing Device fan operation frequency is constant.
9. a kind of blower control method characterized by comprising
Obtain air-conditioning system pressure and external environment temperature;
Air-conditioning system pressure and external environment temperature is made to meet predetermined condition by adjusting the first fan operation frequency;
Make First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature equal by adjusting the second fan operation frequency;
Wherein, in the case where air-conditioning is in heating mode, first blower is lower evaporator fan, and second blower is Upper evaporator fan, the First Heat Exchanger outlet temperature are upper evaporator outlet temperature, second heat exchanger outlet temperature For lower evaporator outlet temperature.
10. blower control method according to claim 9, which is characterized in that described by adjusting the second fan operation frequency Rate makes First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature is equal includes:
First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are obtained with predetermined time interval;
The second fan operation frequency is adjusted according to First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature.
11. blower control method according to claim 10, which is characterized in that described by adjusting the second fan operation frequency Rate makes First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature equal further include:
Preset frequency value, the first fan operation frequency initial value, adjusted is set by the second fan operation frequency initial value Any one of first fan operation frequency executes obtain First Heat Exchanger outlet temperature and second with predetermined time interval later The step of heat exchanger outlet temperature.
12. blower control method according to claim 10, which is characterized in that described according to First Heat Exchanger outlet temperature The second fan operation frequency is adjusted with the second heat exchanger outlet temperature and includes:
Judge whether First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal;
If First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are unequal, according to First Heat Exchanger outlet temperature and The difference of second heat exchanger outlet temperature determines corresponding second blower frequency adjustment, and according to the second blower frequency adjustment Second fan operation frequency is adjusted;
If First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal, keep the second fan operation frequency constant.
13. the blower control method according to any one of claim 9-12, which is characterized in that
In the case where air-conditioning is in heating mode, the air-conditioning system pressure is air-conditioning system low pressure.
14. blower control method according to claim 13, which is characterized in that described by adjusting the first fan operation frequency Rate makes air-conditioning system pressure and external environment temperature meet predetermined condition
Determine evaporation saturation temperature corresponding with the absolute pressure value of the air-conditioning system low pressure;
To evaporate saturation temperature by adjusting lower evaporator fan running frequency and external environment temperature difference is in preset range It is interior.
15. blower control method according to claim 14, which is characterized in that described by adjusting lower evaporator fan fortune Line frequency to evaporate saturation temperature and external environment temperature difference is in preset range and includes:
If the difference of external environment temperature and evaporation saturation temperature promotes lower evaporator fan operation frequency less than the first temperature predetermined value Rate;
If the difference of external environment temperature and evaporation saturation temperature is greater than second temperature predetermined value, lower evaporator fan operation frequency is reduced Rate;
If external environment temperature and the difference for evaporating saturation temperature are between the first temperature predetermined value and second temperature predetermined value, protect It is constant to hold lower evaporator fan running frequency.
16. a kind of fan controller characterized by comprising
Pressure sensor, for obtaining air-conditioning system pressure;
First temperature sensor, for obtaining external environment temperature;
Controller, for making air-conditioning system pressure and external environment temperature meet predetermined item by adjusting the first fan operation frequency Part;And make First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature equal by adjusting the second fan operation frequency;
Wherein, in the case where air-conditioning is in refrigeration mode, first blower is upper condenser fan, and second blower is Lower condenser fan, the First Heat Exchanger outlet temperature are upper condensator outlet temperature, second heat exchanger outlet temperature For lower condensator outlet temperature.
17. fan controller according to claim 16, which is characterized in that
Controller is for determining saturation temperature corresponding with the absolute pressure value of the air-conditioning system pressure;By adjusting first Fan operation frequency is in the saturation temperature and external environment temperature difference in preset range.
18. fan controller according to claim 16, which is characterized in that further include:
Second temperature sensor, for obtaining First Heat Exchanger outlet temperature with predetermined time interval;
Third temperature sensor, for obtaining the second heat exchanger outlet temperature with predetermined time interval;
Controller be used for according to First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature to the second fan operation frequency into Row adjustment.
19. fan controller according to claim 18, which is characterized in that
Controller is used to set preset frequency value, the first fan operation frequency for the second fan operation frequency initial value initial Any one of value, the first fan operation frequency adjusted indicate second temperature sensor and third temperature sensor later Execute the operation that First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are obtained with predetermined time interval.
20. fan controller according to claim 18, which is characterized in that
Controller is for judging whether First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal;In First Heat Exchanger Under outlet temperature and the unequal situation of the second heat exchanger outlet temperature, according to First Heat Exchanger outlet temperature and the second heat exchanger The difference of outlet temperature determines corresponding second blower frequency adjustment, and according to the second blower frequency adjustment to the second blower Running frequency is adjusted;In the case where First Heat Exchanger outlet temperature and equal the second heat exchanger outlet temperature, the is kept Two fan operation frequencies are constant.
21. fan controller described in any one of 8-20 according to claim 1, which is characterized in that be in refrigeration in air-conditioning In the case where mode,
The air-conditioning system pressure is air-conditioning system high pressure;The pressure sensor is high pressure sensor, for obtaining air-conditioning system System high pressure;
The second temperature sensor includes upper condensator outlet temperature sensor, is condensed for being obtained with predetermined time interval Device outlet temperature;
The third temperature sensor includes lower condensator outlet temperature sensor, for obtaining lower condensation with predetermined time interval Device outlet temperature.
22. fan controller according to claim 21, which is characterized in that
The controller is for determining condensation saturation temperature corresponding with the absolute pressure value of the air-conditioning system high pressure;And lead to Crossing the upper condenser fan running frequency of adjustment is in condensation saturation temperature and external environment temperature difference in preset range.
23. fan controller according to claim 22, which is characterized in that
The controller is used in the case where condensing saturation temperature and external environment temperature difference is less than first predetermined value, in reduction Condenser fan running frequency;In the case where condensing saturation temperature and external environment temperature difference is greater than second predetermined value, promoted Upper condenser fan running frequency;First predetermined value and second predetermined value are in condensation saturation temperature and external environment temperature difference Between in the case where, condenser fan running frequency is constant in holding.
24. a kind of fan controller characterized by comprising
Pressure sensor, for obtaining air-conditioning system pressure;
First temperature sensor, for obtaining external environment temperature;
Controller, for making air-conditioning system pressure and external environment temperature meet predetermined item by adjusting the first fan operation frequency Part;And make First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature equal by adjusting the second fan operation frequency;
Wherein, in the case where air-conditioning is in heating mode, first blower is lower evaporator fan, and second blower is Upper evaporator fan, the First Heat Exchanger outlet temperature are upper evaporator outlet temperature, second heat exchanger outlet temperature For lower evaporator outlet temperature.
25. fan controller according to claim 24, which is characterized in that further include:
Second temperature sensor, for obtaining First Heat Exchanger outlet temperature with predetermined time interval;
Third temperature sensor, for obtaining the second heat exchanger outlet temperature with predetermined time interval;
Controller be used for according to First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature to the second fan operation frequency into Row adjustment.
26. fan controller according to claim 25, which is characterized in that
Controller is used to set preset frequency value, the first fan operation frequency for the second fan operation frequency initial value initial Any one of value, the first fan operation frequency adjusted indicate second temperature sensor and third temperature sensor later Execute the operation that First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are obtained with predetermined time interval.
27. fan controller according to claim 25, which is characterized in that
Controller is for judging whether First Heat Exchanger outlet temperature and the second heat exchanger outlet temperature are equal;In First Heat Exchanger Under outlet temperature and the unequal situation of the second heat exchanger outlet temperature, according to First Heat Exchanger outlet temperature and the second heat exchanger The difference of outlet temperature determines corresponding second blower frequency adjustment, and according to the second blower frequency adjustment to the second blower Running frequency is adjusted;In the case where First Heat Exchanger outlet temperature and equal the second heat exchanger outlet temperature, the is kept Two fan operation frequencies are constant.
28. the fan controller according to any one of claim 25-27, which is characterized in that be in heating in air-conditioning In the case where mode,
The air-conditioning system pressure is air-conditioning system low pressure, and the pressure sensor is low pressure sensor, for obtaining air-conditioning system System low pressure;
The second temperature sensor includes upper evaporator outlet temperature sensor, is evaporated for being obtained with predetermined time interval Device outlet temperature;
The third temperature sensor includes lower evaporator outlet temperature sensor, for obtaining lower evaporation with predetermined time interval Device outlet temperature.
29. fan controller according to claim 28, which is characterized in that
The controller is for determining evaporation saturation temperature corresponding with the absolute pressure value of the air-conditioning system low pressure;And lead to Crossing the lower evaporator fan running frequency of adjustment is in evaporation saturation temperature and external environment temperature difference in preset range.
30. fan controller according to claim 29, which is characterized in that
The controller is used to mention in the case where the difference of outer environment temperature and evaporation saturation temperature is less than the first temperature predetermined value Rise lower evaporator fan running frequency;The case where the difference of outer environment temperature and evaporation saturation temperature is greater than second temperature predetermined value Under, reduce lower evaporator fan running frequency;The first temperature predetermined value is in the difference of outer environment temperature and evaporation saturation temperature In the case where between second temperature predetermined value, keep lower evaporator fan running frequency constant.
31. a kind of fan controller, which is characterized in that the fan controller requires any in 1-15 for perform claim Method and step described in.
32. a kind of air-conditioner outdoor unit, which is characterized in that including fan controller described in any one of claim 16-30.
CN201710637708.1A 2017-07-31 2017-07-31 Blower control method and device, air-conditioner outdoor unit CN107328026B (en)

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