CN112212472A - Heating control method of fixed-frequency air conditioner under low-temperature working condition - Google Patents

Heating control method of fixed-frequency air conditioner under low-temperature working condition Download PDF

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Publication number
CN112212472A
CN112212472A CN201910620484.2A CN201910620484A CN112212472A CN 112212472 A CN112212472 A CN 112212472A CN 201910620484 A CN201910620484 A CN 201910620484A CN 112212472 A CN112212472 A CN 112212472A
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China
Prior art keywords
wind speed
pressure value
condenser
indoor fan
air conditioner
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CN201910620484.2A
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Chinese (zh)
Inventor
李延政
刘明
牛巧宁
王玉洁
王录娥
周鹏
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Qingdao Haier Jiaozhou Air Conditioner Co Ltd
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Qingdao Haier Jiaozhou Air Conditioner Co Ltd
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Priority to CN201910620484.2A priority Critical patent/CN112212472A/en
Publication of CN112212472A publication Critical patent/CN112212472A/en
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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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention belongs to the field of air conditioners, and particularly provides a heating control method of a fixed-frequency air conditioner under a low-temperature working condition. The invention aims to solve the problem that the existing fixed-frequency air conditioner can blow cold air under the low-temperature working condition to cause poor user experience, the fixed-frequency air conditioner comprises a condenser, an evaporator, a fixed-frequency compressor and an indoor fan, and the heating control method of the fixed-frequency air conditioner under the low-temperature working condition comprises the following steps: detecting the pressure value P of the condenserc(ii) a Pressure value P based on condensercAnd controlling the wind speed R of the indoor fan. The constant-frequency air conditioner can acquire the pressure value P of the condenser in real timecAnd based on the value, the temperature value of the condenser at the moment is judged, the influence of external conditions on the detection value is reduced, the detection is more accurate, the air supply is started more timely, and the waiting time of a user is reduced.

Description

Heating control method of fixed-frequency air conditioner under low-temperature working condition
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides a heating control method of a fixed-frequency air conditioner under a low-temperature working condition.
Background
The fixed-frequency air conditioner has low production cost and high performance-price ratio, so the fixed-frequency air conditioner also occupies a part of markets for a long time in the field of air conditioners. In the conventional fixed-frequency air conditioner, the frequency of a compressor is fixed, and the frequency of the fixed-frequency compressor cannot be adjusted when the air conditioner heats under a low-temperature working condition, so that the frequency cannot be rapidly increased. After the air conditioner is started in winter, the air blown out by the indoor fan is cold air, so that a user feels cold, and the user experience is reduced.
Accordingly, there is a need in the art for a new heating control method for a fixed-frequency air conditioner under low-temperature conditions to solve the problem that the existing fixed-frequency air conditioner blows cold air under low-temperature conditions, which results in poor user experience.
Disclosure of Invention
In order to solve the problems in the prior art, namely to solve the problem that the existing fixed-frequency air conditioner can blow cold air under a low-temperature working condition to cause poor user experience, the invention provides a heating control method of the fixed-frequency air conditioner under the low-temperature working condition, wherein the fixed-frequency air conditioner comprises a condenser, an evaporator, a fixed-frequency compressor and an indoor fan, and the control method comprises the following steps:
detecting a pressure value P of the condenserc；
Based on the pressure value P of the condensercAnd controlling the size of the wind speed R of the indoor fan.
In the preferable technical scheme of the heating control method of the fixed-frequency air conditioner under the low-temperature working condition, the pressure value P based on the condenser iscAnd the step of controlling the wind speed R of the indoor fan is further carried outThe method comprises the following steps:
when P is presentc≤Pc1When the wind speed is higher than the set wind speed, controlling the wind speed R of the indoor fan to be 0;
wherein, Pc1A threshold value is set for the first.
In a preferable technical solution of the heating control method of the fixed-frequency air conditioner under the low-temperature working condition, the control method further includes:
at Pc1＜Pc＜Pc2Adjusting the wind speed R of the indoor fan to be a set wind speed value R1；
Wherein, Pc2For the second setting threshold, and Pc2＞Pc1。
In a preferable technical solution of the heating control method of the fixed-frequency air conditioner under the low-temperature working condition, the control method further includes:
when P is presentc≥Pc2Adjusting the wind speed R of the indoor fan to be the set wind speed R0Wherein R is0＞R1。
In the preferable technical scheme of the heating control method of the fixed-frequency air conditioner under the low-temperature working condition, the pressure value P of the condenser is detectedc"the control method further includes, after the step of:
detecting a pressure value P of the evaporatore；
"pressure value P based on the condensercThe step of controlling the magnitude of the wind speed R of the indoor fan further includes:
based on the pressure value P of the condensercAnd a pressure value P of the evaporatoreAnd controlling the size of the wind speed R of the indoor fan.
In the preferable technical scheme of the heating control method of the fixed-frequency air conditioner under the low-temperature working condition, the pressure value P based on the condensercAnd a pressure value P of the evaporatoreThe step of controlling the magnitude of the wind speed R of the indoor fan further includes:
when P is presentc≤Pc1Or Pe≤Pe1In time, the wind speed R of the indoor fan is controlledIs 0;
wherein, Pc1Setting a threshold value for the first time; pe1A threshold value is set for the third.
In the preferable technical scheme of the heating control method of the fixed-frequency air conditioner under the low-temperature working condition, the pressure value P based on the condensercThe step of controlling the wind speed R of the indoor fan further includes:
at Pc＞Pc1And P ise＞Pe1Under the condition that P isc≥Pc2And P ise≥Pe2Adjusting the wind speed R of the indoor fan to be the set wind speed R0；
Otherwise, adjusting the wind speed R of the indoor fan to be a set wind speed value R1；
Wherein R is0＞R1，Pc2For the second setting threshold, and Pc2＞Pc1；Pe2Set a threshold for the fourth, and Pe2＞Pe1。
In the preferable technical scheme of the heating control method of the fixed-frequency air conditioner under the low-temperature working condition, the pressure value P based on the condensercAnd a pressure value P of the evaporatoreThe step of controlling the magnitude of the wind speed R of the indoor fan further includes:
based on the pressure value P of the condensercPressure value P of the evaporatoreAnd PcAnd PeTotal pressure value PmAnd controlling the size of the wind speed R of the indoor fan.
In the preferable technical scheme of the heating control method of the fixed-frequency air conditioner under the low-temperature working condition, the pressure value P based on the condensercPressure value P of the evaporatoreAnd PcAnd PeTotal pressure value PmThe step of controlling the magnitude of the wind speed R of the indoor fan further includes:
when P is presentc≤Pc1Or Pe≤Pe1Or Pm≤Pm1When the wind speed is higher than the set wind speed, controlling the wind speed R of the indoor fan to be 0;
wherein, Pc1Setting a threshold value for the first time; pe1Setting a threshold for the third; pm1A threshold value is set for the fifth.
In the preferable technical scheme of the heating control method of the fixed-frequency air conditioner under the low-temperature working condition, the pressure value P based on the condensercPressure value P of the evaporatoreAnd PcAnd PeTotal pressure value PmThe step of controlling the wind speed R of the indoor fan further includes:
at Pc＞Pc1And P ise＞Pe1And P ism＞Pm1Under the condition that P isc≥Pc2And P ise≥Pe2And P ism≥Pm2Adjusting the wind speed R of the indoor fan to be the set wind speed R0；
Otherwise, adjusting the wind speed R of the indoor fan to be a set wind speed value R1；
Wherein R is0＞R1，Pc2For the second setting threshold, and Pc2＞Pc1；Pe2Set a threshold for the fourth, and Pe2＞Pe1；Pm2A threshold value is set for the sixth, and Pm2＞Pm1。
As can be understood by those skilled in the art, in the technical solution of the present invention, the fixed-frequency air conditioner includes a condenser, an evaporator, a fixed-frequency compressor and an indoor fan, and the heating control method of the fixed-frequency air conditioner under low temperature condition includes: detecting the pressure value P of the condenserc(ii) a Pressure value P based on condensercAnd controlling the wind speed R of the indoor fan.
Through the arrangement mode, the fixed-frequency air conditioner can acquire the pressure value P of the condenser in real timecAnd based on the value, the temperature value of the condenser at the moment is judged, and only when the temperature value of the condenser reaches the standard, the temperature of the coil pipe is proved to be suitable for air supply, and the air supply is started at the moment, so that the condition that the fixed-frequency air conditioner blows cold air can be avoided. In addition, compared with the method that the temperature sensor is directly arranged on the condenser, the temperature sensor is influenced by the outsideFor example, the pressure value detection of the condenser can be arranged in the condenser, so that the influence of external conditions on a detection value can be reduced, the detection is more accurate through the corresponding relation between the pressure value and the temperature value, the air supply is started more timely, and the waiting time of a user is reduced.
Drawings
The heating control method of the fixed-frequency air conditioner under the low-temperature working condition is described below with reference to the attached drawings. In the drawings:
FIG. 1 is a flow chart of a heating control method of a fixed-frequency air conditioner under low-temperature working conditions according to the present invention;
FIG. 2 is a logic diagram of a first embodiment of the heating control method of the constant-frequency air conditioner under low temperature conditions according to the present invention;
FIG. 3 is a logic diagram of a second embodiment of the heating control method of the constant-frequency air conditioner under low temperature conditions according to the present invention;
fig. 4 is a logic diagram of a third embodiment of the heating control method of the fixed-frequency air conditioner under low-temperature conditions of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. For example, although the description has been given by taking the condenser pressure value as the temperature condition of the feedback condenser, it is obvious that the invention can take the evaporator pressure value as the measure, because the condenser and the evaporator are both the paths through which the refrigerant flows, and have a relationship therebetween, the condenser and the evaporator are essentially the same, and are both heat exchangers interchangeably during the cooling and heating processes, and therefore, it is within the scope of the invention to measure the temperature condition of the condenser according to the pressure value in the heat exchanger.
Example one
First, referring to fig. 1 and 2, a first embodiment of the present invention will be described. Fig. 1 is a flowchart of a heating control method of a fixed-frequency air conditioner under a low-temperature condition according to the present invention, and fig. 2 is a logic diagram of a first embodiment of the heating control method of the fixed-frequency air conditioner under a low-temperature condition according to the present invention.
As shown in fig. 1, in order to solve the problem that the conventional fixed-frequency air conditioner blows cold air under a low-temperature working condition, which causes poor user experience, the fixed-frequency air conditioner of the present invention includes a condenser, an evaporator, a fixed-frequency compressor and an indoor fan, and the heating control method of the fixed-frequency air conditioner under the low-temperature working condition includes:
s100, detecting the pressure value P of the condenserc(ii) a For example, by providing a pressure value sensor in the condenser line, or providing a stress sensor on the outer surface of the condenser, the pressure value in the condenser line is indirectly detected by a slight change in stress of the outer surface.
S200, pressure value P based on condensercAnd controlling the wind speed R of the indoor fan. For example, the pressure value sensor transmits the detected pressure value to a control unit of the air conditioner, and the control unit is based on the pressure value P of the condensercThe wind speed R of the indoor fan is controlled.
The setting mode has the advantages that: the constant-frequency air conditioner can acquire the pressure value P of the condenser in real timecAnd based on the value, the temperature value of the condenser at the moment is judged, and only when the temperature value of the condenser reaches the standard, the temperature of the coil pipe is proved to be suitable for air supply, and the air supply is started at the moment, so that the condition that the fixed-frequency air conditioner blows cold air can be avoided. In addition, compared with the method that the temperature sensor is directly arranged on the condenser, the temperature sensor is greatly influenced by the outside, for example, the positions of the temperature sensors are different, the detection temperature is different, and the real-time state of the condenser cannot be accurately reflected in time.
Referring to fig. 2, a first embodiment of the heating control method of the constant-frequency air conditioner under low temperature condition according to the present invention will be described in detail.
In one possible embodiment, as shown in FIG. 2, the condenser pressure value P is "based on" the condenser pressure valuecThe step of controlling the magnitude of the wind speed R of the indoor fan further includes:
judgment of PcAnd Pc1And Pc2The size of (d); wherein, Pc1For the first setting of a threshold value, Pc2For the second setting threshold, and Pc2＞Pc1. Wherein, Pc1And Pc2The obtaining of (b) may be based on calculation, or may be based on experiment, for example, multiple experiments, which are performed to obtain the outlet air temperature and PcDirectly connected to form an empirical data table, and inquiring P through the empirical tablec1The value of (c).
When P is presentc≤Pc1When the fan is in the running state, the indoor fan is controlled to stop running or keep in the non-running state; when P is presentc≤Pc1At this time, the pressure value of the condenser is lower than a first preset threshold value P preset under the low-temperature working conditionc1，Pc1For the threshold value of minimum pressure, the air-out temperature that this pressure value corresponds is the temperature that the user must not accept, if indoor fan is operating this moment, then need to stop the operation of indoor fan comprehensively, if indoor fan does not operate, then keep indoor fan not operation revolving stage, ensure to blow off cold wind, cause user experience not good.
Further, at Pc1＜Pc＜Pc2Adjusting the wind speed R of the indoor fan to a set wind speed value R1(ii) a When P is presentc1＜Pc＜Pc2At the moment, the pressure value of the condenser is higher than a preset first set threshold value Pc1But still below a preset second set threshold Pc2At the moment, the corresponding temperature can not feel cold under the condition of small air volume, so that if the indoor fan is not operated, the indoor fan can be controlled to be increased from 0 to a lower air speed R1To make the air in the room slowly flow out, if the indoor fan is highAt R1The wind speed of the indoor fan is reduced to R when the wind speed of the indoor fan is operated1The operation can start to regulate the indoor temperature, and the user does not feel cold.
Further, when P isc≥Pc2Adjusting the wind speed R of the indoor fan to be the set wind speed R0(ii) a When P is presentc≥Pc2At this time, the pressure value of the condenser is higher than a second preset threshold value P preset under the low-temperature working conditionc2That is, the condition of blowing cold air will not occur at the outlet air temperature corresponding to the condenser pressure value, even if the air speed reaches the higher set air speed R0Cold air can not be discharged, so that if the indoor unit is not operated, the air speed R of the indoor fan can be increased from 0 to the set air speed R0If the indoor fan is being driven below R0The wind speed of the indoor fan is increased to R when the wind speed is in operation0Thereby bringing the best user experience to the user.
Example two
A second embodiment of the present invention is described in detail with reference to fig. 1 and fig. 3, wherein fig. 3 is a logic diagram of a second embodiment of a heating control method of a fixed-frequency air conditioner under low temperature conditions according to the present invention.
In a possible embodiment, as shown in fig. 1 and 3, the pressure value P of the condenser is "detectedc"after the step, the refrigeration control method further includes: detecting pressure value P of evaporatore(ii) a "condenser-based pressure value PcThe step of controlling the wind speed R of the indoor fan further comprises: pressure value P based on condensercAnd pressure value P of the evaporatoreAnd controlling the wind speed R of the indoor fan.
The setting mode has the advantages that: the pressure value P of the evaporator is increasedeAs a judgment condition, by PcAnd PeAt the same time, the temperature state of the condenser can be reflected more accurately because the refrigerant in the air conditioner flows among the compressor, the throttling element, the condenser and the evaporator, and therefore, the pressure value between the condenser and the evaporator is correlatedAnd a delay in the flow of the refrigerant may occur. By increasing the judgment of the pressure value of the evaporator, the condition that the independent judgment is not accurate enough and the erroneous judgment is possibly caused by the problem of the pressure value monitoring device is avoided.
With further reference to fig. 3, a second embodiment of the heating control method of the constant-frequency air conditioner under low temperature condition according to the present invention will be described in detail.
As shown in FIG. 3, "condenser-based pressure value PcAnd pressure value P of the evaporatoreThe step of controlling the wind speed R of the indoor fan comprises the following steps:
judgment of PcAnd Pc1And Pc2Is of a size of, and PeAnd Pe1And Pe2The size of (2). Wherein, Pc1And Pc2And Pe1And Pe2The numerical value of (a) may be obtained based on actual experience or obtained through calculation in the same manner as the first embodiment.
When P is presentc≤Pc1Or Pe≤Pe1When the wind speed is higher than the set wind speed, controlling the wind speed R of the indoor fan to be 0; wherein, Pc1Setting a threshold value for the first time; pe1A threshold value is set for the third.
When P is presentc≤Pc1Or Pe≤Pe1In the present embodiment, it is described that at least one of the condenser and the evaporator is lower than the set threshold, and since the pressure values of the condenser and the evaporator have a certain delay, if there is an excess, the indoor fan needs to be stopped or kept in a non-operating state in order to avoid blowing out cold air as much as possible, which is the same as the first embodiment. Compared with the judgment through a single pressure value, the judgment of the second embodiment is more accurate and timely, and therefore the probability of blowing cold air can be further reduced.
At Pc＞Pc1And P ise＞Pe1Under the condition that P isc≥Pc2And P ise≥Pe2Adjusting the wind speed R of the indoor fan to be the set wind speed R0(ii) a Otherwise, adjusting the wind speed R of the indoor fan to be the set wind speed value R1(ii) a Wherein, Pc2Setting a threshold for the secondAnd P isc2＞Pc1；Pe2Set a threshold for the fourth, and Pe2＞Pe1。
When P is presentc≥Pc2And P ise≥Pe2When the pressure value of the condenser is in the normal range, the temperature of the condenser corresponding to the pressure value is in the normal range, and at the moment, the wind speed R of the indoor fan can be changed from 0 or the set wind speed value R1Rising to set wind speed R0And the high-efficiency heat exchange state is kept, and stable service is provided for users. However, when P isc≤Pc2And P ise≤Pe2If the temperature value is not satisfied, the temperature corresponding to the pressure value of the condenser does not feel cold under the condition of small air volume, and the indoor fan can be controlled to be increased from 0 to a lower air speed R1The air is slowly exhausted indoors, so that the indoor temperature can be adjusted, and a user does not feel cold.
EXAMPLE III
A third embodiment of the present invention is described in detail below with further reference to fig. 4. Fig. 4 is a logic diagram of a third embodiment of the heating control method of the fixed-frequency air conditioner under low-temperature conditions according to the present invention.
The third embodiment is to add P to the second embodimentcAnd PeTotal pressure value PmThe temperature state judgment of the condenser is more accurate as one of the judgment conditions.
Specifically, the "condenser-based pressure value PcAnd pressure value P of the evaporatoreThe step of controlling the wind speed R of the indoor fan further comprises: pressure value P based on condensercPressure value P of evaporatoreAnd PcAnd PeTotal pressure value PmAnd controlling the wind speed R of the indoor fan.
As shown in FIG. 4, "condenser-based pressure value PcPressure value P of evaporatoreAnd PcAnd PeTotal pressure value PmThe step of controlling the wind speed R of the indoor fan comprises the following steps:
judgment of PcAnd Pc1And Pc2Size, P ofeAnd Pe1And Pe2Size and P ofmAnd Pm1And Pm2The size of (d); wherein, Pc1And Pc2，Pe1And Pe2And Pm1And Pm2The numerical value of (a) may be obtained based on actual experience or obtained through calculation in the same manner as the first embodiment.
When P is presentc≤Pc1Or Pe≤Pe1Or Pm≤Pm1When the wind speed is higher than the set wind speed, controlling the wind speed R of the indoor fan to be 0; wherein, Pc1Setting a threshold value for the first time; pe1Setting a threshold for the third; pm1A threshold value is set for the fifth.
At Pc＞Pc1And P ise＞Pe1And P ism＞Pm1Under the condition that P isc≥Pc2And P ise≥Pe2And P ism≥Pm2Adjusting the wind speed R of the indoor fan to be the set wind speed R0(ii) a Otherwise, adjusting the wind speed R of the indoor fan to be a set wind speed value R1(ii) a Wherein, Pc2For the second setting threshold, and Pc2＞Pc1；Pe2Set a threshold for the fourth, and Pe2＞Pe1；Pm2A threshold value is set for the sixth, and Pm2＞Pm1。
The control method of the third embodiment is substantially the same as that of the second embodiment, and P is further increasedcAnd PeTotal pressure value PmThe reason for the judgment condition is that the pressure sum of the two parts can reflect the temperature state information of the condenser due to the hysteresis property between the two parts, and the judgment condition is introduced, so that the air conditioner is more difficult to blow out cold air, and the constant-frequency compressor can grasp the temperature state of the condenser more accurately.
To sum up, the temperature state of the condenser of the fixed-frequency compressor can be fed back to the control unit of the fixed-frequency air conditioner more quickly and accurately by introducing the pressure value of the condenser, the pressure value of the evaporator and the judgment of the sum of the pressure values of the condenser and the evaporator, so that the rotating speed of the indoor fan can be controlled more accurately, and the condition that the fixed-frequency air conditioner blows out cold air is avoided.
It should be noted that the above-mentioned embodiments are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention, and those skilled in the art can modify the above-mentioned structure so that the present invention can be applied to more specific application scenarios without departing from the principle of the present invention.
For example, in an alternative embodiment, Pc、PeAnd PmThe three can reflect the temperature state of the condenser alone or in combination of any two of the three, and the temperature state of the condenser is related to the pressure value of the condenser and the evaporator without departing from the principle of the invention, so the temperature state of the condenser and the evaporator can be within the protection scope of the invention.
Those skilled in the art will appreciate that the air conditioner described above may also include other known structures such as processors, controllers, memories, etc., wherein the memories include, but are not limited to, ram, flash, rom, prom, volatile, non-volatile, serial, parallel, or registers, etc., and the processors include, but are not limited to, CPLD/FPGA, DSP, ARM processor, MIPS processor, etc. Such well-known structures are not shown in the drawings in order to not unnecessarily obscure embodiments of the present disclosure.
Although the foregoing embodiments describe the steps in the above sequential order, those skilled in the art will understand that, in order to achieve the effect of the present embodiments, the steps may not be executed in such an order, and may be executed simultaneously (in parallel) or in an inverse order, and these simple variations are within the scope of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (10)

1. A heating control method of a fixed-frequency air conditioner under a low-temperature working condition is characterized in that the fixed-frequency air conditioner comprises a condenser, an evaporator, a fixed-frequency compressor and an indoor fan, and the control method comprises the following steps:
detecting a pressure value P of the condenserc；
Based on the pressure value P of the condensercAnd controlling the size of the wind speed R of the indoor fan.
2. The heating control method of the constant-frequency air conditioner under the low-temperature working condition according to claim 1, wherein the pressure value P based on the condenser iscThe step of controlling the magnitude of the wind speed R of the indoor fan further includes:
when P is presentc≤Pc1When the wind speed is higher than the set wind speed, controlling the wind speed R of the indoor fan to be 0;
wherein, Pc1A threshold value is set for the first.
3. The heating control method of the fixed-frequency air conditioner under the low-temperature working condition according to claim 2, characterized by further comprising the following steps:
at Pc1＜Pc＜Pc2Adjusting the wind speed R of the indoor fan to be a set wind speed value R1；
Wherein, Pc2For the second setting threshold, and Pc2＞Pc1。
4. The heating control method of the fixed-frequency air conditioner under the low-temperature working condition according to claim 3, characterized by further comprising the following steps:
when P is presentc≥Pc2Adjusting the wind speed R of the indoor fan to be the set wind speed R0Wherein R is0＞R1。
5. The heating control method of the constant-frequency air conditioner under the low-temperature working condition according to claim 1, wherein the pressure value P of the condenser is detectedc"the control method further includes, after the step of:
detecting a pressure value P of the evaporatore；
"pressure value P based on the condensercThe step of controlling the magnitude of the wind speed R of the indoor fan further includes:
based on the pressure value P of the condensercAnd a pressure value P of the evaporatoreAnd controlling the size of the wind speed R of the indoor fan.
6. The heating control method of the constant-frequency air conditioner under the low-temperature working condition according to claim 5, wherein the pressure value P based on the condenser iscAnd a pressure value P of the evaporatoreThe step of controlling the magnitude of the wind speed R of the indoor fan further includes:
when P is presentc≤Pc1Or Pe≤Pe1When the wind speed is higher than the set wind speed, controlling the wind speed R of the indoor fan to be 0;
wherein, Pc1Setting a threshold value for the first time; pe1A threshold value is set for the third.
7. The heating control method of the constant-frequency air conditioner under the low-temperature working condition according to claim 6, wherein the pressure value P based on the condenser iscThe step of controlling the wind speed R of the indoor fan further includes:
at Pc＞Pc1And P ise＞Pe1Under the condition that P isc≥Pc2And P ise≥Pe2Adjusting the wind speed R of the indoor fan to be the set wind speed R0；
Otherwise, adjusting the wind speed R of the indoor fan to be a set wind speed value R1；
Wherein R is0＞R1，Pc2For the second setting threshold, and Pc2＞Pc1；Pe2Set a threshold for the fourth, and Pe2＞Pe1。
8. The heating control method of the constant-frequency air conditioner under the low-temperature working condition according to claim 5, wherein the pressure value P based on the condenser iscAnd a pressure value P of the evaporatoreThe step of controlling the magnitude of the wind speed R of the indoor fan further includes:
based on the pressure value P of the condensercPressure value P of the evaporatoreAnd PcAnd PeTotal pressure value PmAnd controlling the size of the wind speed R of the indoor fan.
9. The heating control method of the constant-frequency air conditioner under the low-temperature working condition according to claim 8, wherein the pressure value P based on the condenser iscPressure value P of the evaporatoreAnd PcAnd PeTotal pressure value PmThe step of controlling the magnitude of the wind speed R of the indoor fan further includes:
when P is presentc≤Pc1Or Pe≤Pe1Or Pm≤Pm1When the wind speed is higher than the set wind speed, controlling the wind speed R of the indoor fan to be 0;
wherein, Pc1Setting a threshold value for the first time; pe1Setting a threshold for the third; pm1A threshold value is set for the fifth.
10. The heating control method of the constant-frequency air conditioner under the low-temperature working condition according to claim 9, wherein the pressure value P based on the condenser iscPressure value P of the evaporatoreAnd PcAnd PeTotal pressure value PmThe step of controlling the wind speed R of the indoor fan further includes:
at Pc＞Pc1And P ise＞Pe1And P ism＞Pm1Under the condition that P isc≥Pc2And P ise≥Pe2And P ism≥Pm2Adjusting the wind speed R of the indoor fan to be the set wind speed R0；
Otherwise, adjusting the wind speed R of the indoor fan to be a set wind speed value R1；
Wherein R is0＞R1，Pc2For the second setting threshold, and Pc2＞Pc1；Pe2Set a threshold for the fourth, and Pe2＞Pe1；Pm2A threshold value is set for the sixth, and Pm2＞Pm1。
CN201910620484.2A 2019-07-10 2019-07-10 Heating control method of fixed-frequency air conditioner under low-temperature working condition Pending CN112212472A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
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CN102466304A (en) * 2010-11-16 2012-05-23 力博特公司 Air-conditioning system and control method of condensation fan thereof
CN102901181A (en) * 2012-10-09 2013-01-30 广东美的制冷设备有限公司 Cold air prevention control method of air conditioner indoor unit
JP2014102045A (en) * 2012-11-21 2014-06-05 Fujitsu General Ltd Air conditioner
CN106322679A (en) * 2016-08-31 2017-01-11 广东美的制冷设备有限公司 Control method for outdoor fan of air conditioner
CN106482295A (en) * 2016-10-18 2017-03-08 广东美的暖通设备有限公司 Indoor fan control method and device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110138830A1 (en) * 2009-12-16 2011-06-16 Sanyo Electric Co., Ltd. Air conditioner
CN102466304A (en) * 2010-11-16 2012-05-23 力博特公司 Air-conditioning system and control method of condensation fan thereof
CN102901181A (en) * 2012-10-09 2013-01-30 广东美的制冷设备有限公司 Cold air prevention control method of air conditioner indoor unit
JP2014102045A (en) * 2012-11-21 2014-06-05 Fujitsu General Ltd Air conditioner
CN106322679A (en) * 2016-08-31 2017-01-11 广东美的制冷设备有限公司 Control method for outdoor fan of air conditioner
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