CN110425700B - Air conditioner low-temperature heating starting control method and device and air conditioner - Google Patents
Air conditioner low-temperature heating starting control method and device and air conditioner Download PDFInfo
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- CN110425700B CN110425700B CN201910920409.8A CN201910920409A CN110425700B CN 110425700 B CN110425700 B CN 110425700B CN 201910920409 A CN201910920409 A CN 201910920409A CN 110425700 B CN110425700 B CN 110425700B
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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Abstract
The invention provides a low-temperature heating starting control method and device for an air conditioner and the air conditioner, wherein the method comprises the following steps: acquiring an ambient temperature; when the environment temperature is lower than the set temperature, a first starting instruction is sent to a fan of an outdoor unit, and the fan is controlled to start and operate at the highest rotating speed; after the third time, sending a second starting instruction to the compressor to control the compressor to start; and after the fifth time, opening an electronic expansion valve of the outdoor unit. The air conditioner low-temperature heating starting control method can quickly establish the superheat degree of the system on the premise of ensuring that the oil discharge amount of the system is low, improves the heat exchange effect, enables the compressor to quickly heat, reduces the oil discharge amount, ensures the reliability of the system, and realizes the quick heating of the air conditioner low-temperature heating starting.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a low-temperature heating starting control method and device of an air conditioner and the air conditioner.
Background
When the air conditioner is started for heating in a low-temperature environment, the heat exchanger must be raised to a high-temperature state at a sufficiently high speed, and the low oil discharge rate of the compressor is ensured to realize rapid heating. However, because the ambient temperature is low, the heat exchanger needs a long time to be heated to a high temperature state; the lower the environmental temperature is, the more soluble the refrigerant oil is in the refrigerant, and the larger the oil discharge amount is, which affects the reliability of the system. When the existing air conditioner is started in low-temperature heating, the heat exchanger is difficult to be ensured to rise to a high-temperature state at a sufficiently high speed, the oil discharge rate of the compressor is low, and the air conditioner is difficult to realize quick heating.
Therefore, a method for raising the heat exchanger to a high temperature state at a sufficiently high speed and ensuring a low oil discharge rate of the compressor is demanded.
Disclosure of Invention
The invention solves the problems that: when the existing air conditioner is started in low-temperature heating, the heat exchanger is difficult to be ensured to be raised to a high-temperature state at a sufficiently high speed, the oil discharge rate of the compressor is low, and the air conditioner is difficult to realize the rapid heating.
In order to solve the above problems, the present invention provides a method for controlling low-temperature heating start of an air conditioner, comprising:
acquiring an ambient temperature;
when the environment temperature is lower than the set temperature, a first starting instruction is sent to a fan of an outdoor unit, and the fan is controlled to start and operate at the highest rotating speed;
and after the first duration, sending a second starting instruction to the compressor to control the compressor to start.
Therefore, the superheat degree of the system can be quickly established on the premise of ensuring the low oil discharge amount of the system, the heat exchange effect is improved, the compressor is quickly heated, the oil discharge amount is reduced, the reliability of the system is ensured, and the quick heating of the low-temperature heating start of the air conditioner is realized.
Optionally, after the first duration, a second start instruction is sent to the compressor, and after the compressor is controlled to start, the method further includes:
and after the fifth time, opening an electronic expansion valve of the outdoor unit.
Therefore, when the air conditioner is started to heat at a low temperature, the electronic expansion valve is controlled to be later than the compressor, the refrigerant in the outdoor heat exchanger can exchange heat fully, the heat exchange effect is improved, the heat exchanger can be raised to a high-temperature state at a high speed, and the quick heating of the air conditioner during the low-temperature heating starting is facilitated.
Optionally, when the ambient temperature is lower than the set temperature, a first start instruction is sent to a fan of the outdoor unit, and after the fan is controlled to start and operate at the highest rotation speed, the method further includes:
and after the second time, controlling the fan to operate at a preset noise tolerance rotating speed.
Therefore, the fan can be utilized to exchange heat to the maximum extent, the quick heating of the low-temperature heating starting of the air conditioner is facilitated, the noise can be avoided, and the user experience can be reduced.
Optionally, after the first duration, a second start instruction is sent to the compressor, and after the compressor is controlled to start, the method further includes:
controlling the compressor to operate at a first frequency.
Therefore, the compressor is controlled to operate at a higher frequency after the compressor is started, the superheat degree of the system is favorably and quickly established, the heat exchange effect is improved, and the quick heating of the low-temperature heating start of the air conditioner is favorably realized.
Optionally, after controlling the compressor to operate at the first frequency, the method further comprises:
and after the third time period, reducing the operating frequency of the compressor to a second frequency, and controlling the compressor to operate at the second frequency for a fourth time period, wherein the second frequency is less than the first frequency.
Therefore, the reliability of the system can be ensured while the low-temperature start and quick heating are realized.
After the fifth time period, after the electronic expansion valve of the outdoor unit is opened, the method further includes:
and controlling the electronic expansion valve to operate for a sixth time period in the initial steps.
Therefore, after the electronic expansion valve is opened, the electronic expansion valve is controlled to operate for the sixth time period in the initial steps, the control of the electronic expansion valve can be utilized to the maximum extent to establish the superheat degree of the system, and the heat exchange effect is improved.
Optionally, the value range of the first frequency is 35Hz to 50 Hz;
or the value range of the second frequency is 20Hz-34 Hz.
Therefore, the superheat degree of the system can be quickly established, the heat exchange effect is improved, and the system can be prevented from generating reliability risks.
Optionally, the value range of the first duration is 10s to 60 s.
Therefore, the first time length is better in value, the oil discharge amount can be effectively reduced, the temperature rising speed of the heat exchanger can be prevented from being influenced, and the quick heating of the low-temperature heating starting of the air conditioner can be guaranteed.
Another object of the present invention is to provide a low-temperature heating start control device for an air conditioner, which solves the problems that it is difficult to simultaneously ensure that a heat exchanger is raised to a high-temperature state at a sufficiently high speed and the oil discharge rate of a compressor is low when a conventional air conditioner is started for low-temperature heating, and it is difficult to rapidly heat the air conditioner.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an air conditioner low temperature heating starting control device comprises:
a control unit for acquiring an ambient temperature;
the control unit is also used for sending a first starting instruction to a fan of the outdoor unit when the ambient temperature is lower than the set temperature, and controlling the fan to start and operate at the highest rotating speed;
the control unit is also used for sending a second starting instruction to the compressor after the first time length, and controlling the compressor to start;
and after the first time period, sending a second starting instruction to the compressor to control the compressor to be started, wherein the control unit is also used for opening the electronic expansion valve of the outdoor unit after a fifth time period.
Compared with the prior art, the air conditioner low-temperature heating starting control device and the air conditioner low-temperature heating starting control method have the same advantages, and are not repeated herein.
Another object of the present invention is to provide an air conditioner, which solves the problems that it is difficult to simultaneously ensure that a heat exchanger is raised to a high temperature state at a sufficiently high speed and the oil discharge rate of a compressor is low when a conventional air conditioner is started to heat at a low temperature, and it is difficult to rapidly heat the air conditioner.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an air conditioner comprises a computer readable storage medium and a processor, wherein a computer program is stored in the computer readable storage medium, and when the computer program is read and executed by the processor, the air conditioner low-temperature heating starting control method is realized.
Compared with the prior art, the air conditioner and the control method for the low-temperature heating starting of the air conditioner have the same advantages, and are not repeated herein.
Another objective of the present invention is to provide a computer readable storage medium to solve the problem that it is difficult to simultaneously ensure that a heat exchanger is raised to a high temperature state at a sufficiently fast speed and the oil discharge rate of a compressor is low when a conventional air conditioner is started to heat at a low temperature, so that it is difficult to rapidly heat the air conditioner.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a computer-readable storage medium storing a computer program which, when read and executed by a processor, implements any one of the above-described air-conditioning low-temperature heating start-up control methods.
The computer readable storage medium has the same advantages as the above-mentioned air conditioner low temperature heating start control method compared with the prior art, and is not described herein again.
Drawings
Fig. 1 is a flowchart of a low-temperature heating start control method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a starting process of an outdoor unit fan when an air conditioner starts to generate heat at a low temperature according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a starting process of a compressor when an air conditioner is started to perform low-temperature heating according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating the starting process of the electronic expansion valve of the outdoor unit when the air conditioner is started for low-temperature heating according to the embodiment of the present invention;
fig. 5 is an overall flowchart of a control method for starting low-temperature heating of an air conditioner according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It should be noted that the starting control in the present application is a process from when the compressor receives the starting instruction to when the whole air conditioning system is basically stable. The conventional whole starting time is generally 0-30 min, but the starting time is too long for the rapid heating to be achieved by the application.
The scheme claimed by the application is applied to the control within 5min after the air conditioner receives the starting instruction, and at the stage, because the time is short, many similar control methods in the prior art are not suitable after the starting time is compressed from 30min to 5 min; the instability of the system is increased due to the compression of the starting time, so that the importance of controlling the system state is more critical; to realize rapid heating, the system state needs to be controlled within a limited operation range to ensure the reliability of the compressor, otherwise, the compressor is more prone to failure due to rapid heating. As shown in fig. 1, it is a flow chart of the air-conditioning low-temperature heating start control method in the present embodiment; wherein the method comprises the following steps:
step S10, acquiring the ambient temperature;
step S20, when the environment temperature is lower than the set temperature, a first starting instruction is sent to a fan of the outdoor unit, and the fan is controlled to start and operate at the highest rotating speed;
step S30, after the first time, sending a second starting instruction to the compressor to control the compressor to start;
generally, an air conditioner determines whether to perform low-temperature heating starting by judging the ambient temperature, and when the ambient temperature is lower than a set temperature, the air conditioner represents that the air conditioner is in a low-temperature environment, and the air conditioner starts the low-temperature heating starting. For example, the low temperature heating start may be optionally initiated when the air conditioning is below-5 ℃.
The first start instruction and the second start instruction may be sent by an air conditioner indoor unit, or may be sent by a remote controller or other devices having a start control function. The maximum rotating speed is the limit rotating speed which can be reached by the fan, namely the maximum rotating speed allowed by the reliability of the motor. In the embodiment, when the air conditioner is started in a low-temperature heating mode, the fan is started in preference to the compressor, so that the outdoor heat exchanger can be preheated in advance, and the air suction temperature of the compressor is increased; since the higher the temperature is, the less the amount of the refrigerant oil dissolved in the refrigerant is, the higher the suction temperature of the compressor is when the compressor is started, which contributes to reducing the amount of the refrigerant oil dissolved in the refrigerant, and thus reducing the amount of oil discharged.
When the existing air conditioner is started for heating at a low temperature, after a starting instruction sent by an indoor unit is received, a fan can operate according to the noise tolerance rotating speed, and the limit rotating speed of the fan is not utilized to the maximum extent, so that the fan is not utilized to the maximum extent for heat exchange, and the speed of the outdoor heat exchanger when the temperature rises to a high-temperature state is insufficient. Wherein the noise tolerance rotation speed is a rotation speed which meets an external machine noise nominal value, and the noise tolerance rotation speed is smaller than the highest rotation speed, for example: the nominal outdoor unit noise value is 42db (a), corresponding to a noise margin speed of 800 revolutions, and the maximum allowable speed of the fan is 880 revolutions. In the embodiment, the fan is controlled to operate at the highest rotating speed allowed by the reliability of the motor when the air conditioner is started for heating at the low temperature, the fan is utilized to exchange heat to the maximum extent, the temperature rising speed of the outdoor heat exchanger is increased, the quick heating of the air conditioner during the starting for heating at the low temperature can be realized, and the superheat degree of the system is quickly established.
Therefore, the air conditioner low-temperature heating starting control method can quickly establish the superheat degree of the system on the premise of ensuring that the oil discharge quantity of the system is low, improve the heat exchange effect, ensure the reliability of the system and realize quick heating of low-temperature heating starting of the air conditioner.
After the first duration, sending a second start instruction to the compressor, and after controlling the start of the compressor, the method further includes:
in step S40, after the fifth time period, the electronic expansion valve of the outdoor unit is opened.
Wherein, it should be noted that, the fifth time period is started after controlling the start of the compressor, and the function of the fifth time period is to limit the time interval between the start of the compressor and the opening of the electronic expansion valve.
In this embodiment, when the air conditioner is started for low-temperature heating, the electronic expansion valve is started later than the compressor, and when the compressor is started, the electronic expansion valve is still kept in a closed state.
In addition, at low temperature, the refrigeration oil is easy to dissolve in the refrigerant, and the oil discharge amount is large after the unit operates, so that the reliability of the system is influenced. When the compressor is started, the electronic expansion valve is still in a closed state, the started compressor can quickly establish the pressure difference between the high-pressure side and the low-pressure side, the pressure difference is increased, the input power of the compressor can be increased after the electronic expansion valve is opened, the heating value is increased, and the compressor can quickly heat, so that the refrigerant oil is quickly heated and separated from the refrigerant, the oil discharge amount is reduced, and the reliability of the system is improved.
Therefore, the compressor can reduce the oil discharge amount and quickly heat.
Like this, this embodiment can be when the air conditioner heats the start-up at low temperature, and control electronic expansion valve is later than the compressor start-up, can make the refrigerant in the outdoor heat exchanger fully heat transfer, promotes the heat transfer effect, and the heat exchanger can rise to the high temperature state with enough fast, helps realizing the quick heating that the air conditioner heats the start-up at low temperature.
Optionally, the method further includes:
and starting a chassis electric heating belt of the outdoor unit at the same time or before starting the fan.
Therefore, the outdoor heat exchanger can be preheated in advance, the oil discharge amount is reduced, and the quick heating of the low-temperature heating start of the air conditioner is facilitated.
Optionally, the maximum rotation speed ranges from 900rpm to 1000rpm, and the maximum rotation speed allowed by the reliability of the motor is determined. "rpm" is the unit "rpm" of fan speed.
Optionally, the value range of the first duration is 10s to 60 s.
If the first time length is too short, the waiting time for starting the compressor is too short, the preheating effect on the compressor is not obvious, and the oil discharge amount is difficult to effectively reduce; if the first time length is too long, the waiting time for starting the compressor is too long, and the temperature rising speed of the heat exchanger is influenced.
Therefore, in the embodiment, the preferred value range of the first time length is 10s-60s, and the first time length is better, so that the oil discharge amount can be effectively reduced, the temperature rising speed of the heat exchanger can be prevented from being influenced, and the quick heating of the low-temperature heating start of the air conditioner can be ensured.
Optionally, as shown in fig. 2, after step S20, the method further includes:
and step S21, after the second time period, controlling the fan to operate at the preset noise tolerance speed.
When the air conditioner is started in a low-temperature heating mode, if the fan is controlled to operate at the highest rotating speed all the time, the noise is too high, and the user experience is reduced. In the embodiment, the fan is controlled to operate at the highest rotating speed within the second time period when the fan is just started, and due to the fact that the noise generated when the fan is just started continuously changes, the experience of the noise is insensitive, and the user experience cannot be influenced; the fan runs with the maximum rotational speed after a period of time, and the noise that this moment fan produced reaches certain extent, if the fan still runs with the maximum rotational speed, can reduce user experience, and this embodiment controls the fan and runs with noise margin rotational speed after the fan runs with the maximum rotational speed after a period of time, can avoid the noise to reduce user experience.
Like this, this embodiment both can furthest utilize the fan to carry out the heat transfer, help realizing that the air conditioner heats the quick heating of starting at a low temperature, can avoid the noise to reduce user experience again.
In addition, the fan is operated at a preset noise tolerance rotating speed, so that noise can be reduced, and the influence of noise on user experience is avoided; moreover, the fan is in the noise tolerance rotating speed, so that the running efficiency of the fan is higher, and the power saving effect is good; and can avoid the fan to operate at a high speed all the time and lead to tired the increase, shorten life.
Optionally, the value range of the second duration is 30s to 120 s.
If the second time is too short, the time that the fan runs at the highest rotating speed is too short, and the effect of accelerating the heat exchange of the heat exchanger cannot be realized; if the second duration is too long, the noise will be too high, reducing user experience.
Therefore, the preferred value range of the second duration is 30s-120s, so that the effect of accelerating heat exchange of the heat exchanger can be realized, and reduction of user experience is avoided.
Optionally, as shown in fig. 3, after step S30, the method further includes:
step S31, controlling the compressor to operate at a first frequency.
When the existing air conditioner is started for heating at a low temperature, after a second starting instruction sent by an indoor unit is received, the compressor is usually gradually increased from low to high at a fixed frequency, and the speed for improving the slow heat exchange effect is low. This embodiment is when the compressor just starts, and the control compressor is with first frequency operation, because the system is when not starting, and the inside refrigeration oil of compressor is more, and consequently the compressor is with higher frequency operation in the short time, and the functioning speed of compressor is limited, and the oil extraction volume is not big, can not produce the reliability risk, and the frequency of control compressor this moment promotes higher value, helps establishing the system superheat degree fast, promotes the heat transfer effect.
Like this, this embodiment controls the compressor and with higher frequency operation after the compressor starts, helps establishing the system superheat degree fast, promotes the heat transfer effect, and then helps realizing that the air conditioner heats the quick heating of starting at a low temperature.
Optionally, as shown in fig. 3, after step S31, the method further includes:
and step S32, after the third time period, reducing the operating frequency of the compressor to a second frequency, and controlling the compressor to operate at the second frequency for a fourth time period.
Wherein the first frequency is greater than the second frequency. After the compressor is operated at the second frequency for a fourth time period, the frequency of the compressor is adjusted according to the existing normal control.
When the air conditioner is started at low temperature for heating, if the compressor is always operated at the first frequency, the oil discharge amount is too large, and the reliability of the system is affected. According to the embodiment, after the compressor runs for the third time length at the first frequency, the compressor is controlled to run for the fourth time length at the second frequency, the running frequency of the compressor can be reduced when the oil discharge amount is increased to a certain degree, the oil discharge amount is reduced, and therefore the reliability of the system is guaranteed.
Thus, the embodiment can ensure the reliability of the system while realizing quick heating at low-temperature start.
Optionally, the value range of the first frequency is 35Hz to 50 Hz.
If the first frequency is too low, the superheat degree of the system cannot be quickly established, and the heat exchange effect of the heat exchanger cannot be further improved; if the first frequency is too high, the oil discharge amount of the compressor is too high, and a reliability risk is generated.
Therefore, the preferred value range of the first frequency is 35Hz-50Hz, the value of the first frequency is better, the superheat degree of the system can be quickly established, the heat exchange effect is improved, and the reliability risk of the system can be avoided.
Optionally, the value range of the third duration is 30s to 120 s.
If the third time is too short, the superheat degree of the system cannot be quickly established, and the heat exchange effect of the heat exchanger cannot be improved; if the third time is too long, the oil discharge amount of the compressor is too large, and a reliability risk is generated.
Therefore, in the embodiment, the preferable value range of the third time duration is 30-120 s, the value of the third time duration is better, the superheat degree of the system can be quickly established, the heat exchange effect is improved, and the reliability risk of the system can be avoided.
Optionally, the value range of the second frequency is 20Hz to 34 Hz.
If the second frequency is too low, the heat exchange effect is reduced, and the rapid heating of the system is influenced; if the second frequency is too high, the oil discharge rate of the compressor cannot be effectively reduced.
Therefore, the preferred value range of the second frequency is 20Hz to 34Hz, the value of the second frequency is better, the oil discharge rate of the compressor can be effectively reduced on the premise of not influencing the rapid heating of the system, and the reliability of the system is favorably improved.
Optionally, the value range of the fourth duration is 30s to 120 s.
If the fourth time is too long and too short, the oil discharge rate of the compressor cannot be effectively reduced; if the fourth time length is too long, the heat exchange effect is reduced, and the rapid heating of the system is influenced.
Therefore, in the embodiment, the preferable value range of the fourth time duration is 30-120 s, and the value of the fourth time duration is better, so that the oil discharge rate of the compressor can be effectively reduced on the premise of not influencing the rapid heating of the system, and the reliability of the system is favorably improved.
Optionally, the value range of the fifth duration is 10s to 60 s.
If the fifth time is too short, the refrigerant in the outdoor heat exchanger does not exchange heat sufficiently, and the effect of increasing the temperature rise speed of the heat exchanger is difficult to achieve; if the fifth time is too long, the waiting time for opening the electronic expansion valve is too long, which easily causes the low voltage of the system to be too low, and generates the reliability risk.
In this way, in this embodiment, it is preferable that the value range of the fifth time period is 10s to 60s, and the value of the fifth time period is more preferable, so that the occurrence of a reliability risk can be avoided on the premise of realizing quick heating of low-temperature heating start of the air conditioner.
Optionally, as shown in fig. 4, after step S40, the method further includes:
and step S41, controlling the electronic expansion valve to operate for a sixth time length in the initial steps.
And after the electronic expansion valve is controlled to operate for the sixth time period in the initial steps, the opening degree of the electronic expansion valve is adjusted according to normal control.
When the existing air conditioner is started for heating at a low temperature, after a starting instruction sent by an indoor unit is received, an electronic expansion valve of the outdoor unit generally operates according to a set step number to prevent system fluctuation, but the electronic expansion valve is not used for controlling to the maximum extent to establish the superheat degree of the system, so that the heat exchange effect is improved.
Therefore, after the electronic expansion valve is opened, the electronic expansion valve is controlled to operate for the sixth time period in the initial steps, the control of the electronic expansion valve can be utilized to the maximum extent to establish the superheat degree of the system, and the heat exchange effect is improved.
From the above, the overall flowchart of the air conditioner low-temperature heating start control method in the present embodiment can be obtained, as shown in fig. 5.
Optionally, the value range of the initial step number is 150pls to 300 pls.
Where "pls" is a unit "step" of the opening degree of the electronic expansion valve.
If the opening degree of the electronic expansion valve is too small, the low pressure is easy to be too low, and the reliability risk is generated; if the opening degree of the electronic expansion valve is too large, the refrigerant returns to the compressor too much, the superheat degree of the system cannot be established, heat exchange is affected, and quick heating cannot be realized.
Therefore, in the embodiment, the preferred value range of the initial step is 150-300 pls, the initial step is better, the superheat degree of the system can be quickly established, the heat exchange effect is improved, and the system is prevented from generating a reliability risk.
Optionally, the value range of the sixth duration is 30s to 120 s.
The embodiment also provides an air conditioner low temperature heating start control device, includes:
a control unit for acquiring an ambient temperature;
the control unit is also used for sending a first starting instruction to a fan of the outdoor unit when the ambient temperature is lower than the set temperature, and controlling the fan to start and operate at the highest rotating speed;
and the control unit is also used for sending a second starting instruction to the compressor after the first duration so as to control the compressor to start.
Generally, an air conditioner determines whether to perform low-temperature heating starting by judging the ambient temperature, and when the ambient temperature is lower than a set temperature, the air conditioner represents that the air conditioner is in a low-temperature environment, and the air conditioner starts the low-temperature heating starting. For example, the low temperature heating start may be optionally initiated when the air conditioning is below-5 ℃.
The first start instruction and the second start instruction may be sent by an air conditioner indoor unit, or may be sent by a remote controller or other devices having a start control function. The maximum rotating speed is the limit rotating speed which can be reached by the fan, namely the maximum rotating speed allowed by the reliability of the motor.
In the embodiment, when the air conditioner is started in a low-temperature heating mode, the fan is started in preference to the compressor, so that the outdoor heat exchanger can be preheated in advance, and the air suction temperature of the compressor is increased; since the higher the temperature is, the less the amount of the refrigerant oil dissolved in the refrigerant is, the higher the suction temperature of the compressor is when the compressor is started, which contributes to reducing the amount of the refrigerant oil dissolved in the refrigerant, and thus reducing the amount of oil discharged.
When the existing air conditioner is started for heating at a low temperature, after a starting instruction sent by an indoor unit is received, a fan can operate according to the noise tolerance rotating speed, and the limit rotating speed of the fan is not utilized to the maximum extent, so that the fan is not utilized to the maximum extent for heat exchange, and the speed of the outdoor heat exchanger when the temperature rises to a high-temperature state is insufficient. The noise tolerance rotating speed is the maximum rotating speed allowed by the noise requirement of the outdoor unit, and the noise tolerance rotating speed is smaller than the maximum rotating speed. In the embodiment, the fan is controlled to operate at the highest rotating speed allowed by the reliability of the motor when the air conditioner is started for heating at the low temperature, the fan is utilized to exchange heat to the maximum extent, the temperature rising speed of the outdoor heat exchanger is increased, the quick heating of the air conditioner during the starting for heating at the low temperature can be realized, and the superheat degree of the system is quickly established.
Like this, the air conditioner low temperature heats the start control device of embodiment can be under the prerequisite that the assurance system oil extraction volume is low quick the system superheat degree of establishing, promotes the heat transfer effect, has guaranteed the reliability of system, has realized the quick heating of air conditioner low temperature heating start.
Optionally, after the first time period, a second start instruction is sent to the compressor to control the compressor to start, and the control unit is further configured to open the electronic expansion valve of the outdoor unit after a fifth time period.
In this embodiment, when the air conditioner is started for low-temperature heating, the electronic expansion valve is started later than the compressor, and when the compressor is started, the electronic expansion valve is still kept in a closed state.
Like this, this embodiment can be when the air conditioner heats the start-up at low temperature, and control electronic expansion valve is later than the compressor start-up, can make the refrigerant in the outdoor heat exchanger fully heat transfer, promotes the heat transfer effect, and the heat exchanger can rise to the high temperature state with enough fast, helps realizing the quick heating that the air conditioner heats the start-up at low temperature. Optionally, the maximum rotation speed ranges from 900rpm to 1000rpm, and the maximum rotation speed allowed by the reliability of the motor is determined. "rpm" is the unit "rpm" of fan speed.
Optionally, the value range of the first duration is 10s to 60 s.
If the first time length is too short, the waiting time for starting the compressor is too short, the preheating effect on the compressor is not obvious, and the oil discharge amount is difficult to effectively reduce; if the first time length is too long, the waiting time for starting the compressor is too long, and the temperature rising speed of the heat exchanger is influenced.
Therefore, in the embodiment, the preferred value range of the first time length is 10s-60s, and the first time length is better, so that the oil discharge amount can be effectively reduced, the temperature rising speed of the heat exchanger can be prevented from being influenced, and the quick heating of the low-temperature heating start of the air conditioner can be ensured.
Optionally, when the ambient temperature is lower than the set temperature, a first start instruction is sent to the fan of the outdoor unit, and after the fan is controlled to start and operate at the highest rotation speed, the control unit is further configured to control the fan to operate at a preset noise tolerance rotation speed after a second time period.
When the air conditioner is started in a low-temperature heating mode, if the fan is controlled to operate at the highest rotating speed all the time, the noise is too high, and the user experience is reduced. In the embodiment, the fan is controlled to operate at the highest rotating speed within the second time period when the fan is just started, and due to the fact that the noise generated when the fan is just started continuously changes, the experience of the noise is insensitive, and the user experience cannot be influenced; the fan runs with the maximum rotational speed after a period of time, and the noise that this moment fan produced reaches certain extent, if the fan still runs with the maximum rotational speed, can reduce user experience, and this embodiment controls the fan and runs with noise margin rotational speed after the fan runs with the maximum rotational speed after a period of time, can avoid the noise to reduce user experience.
Like this, this embodiment both can furthest utilize the fan to carry out the heat transfer, help realizing that the air conditioner heats the quick heating of starting at a low temperature, can avoid the noise to reduce user experience again.
Optionally, the value range of the second duration is 30s to 120 s.
If the second time is too short, the time that the fan runs at the highest rotating speed is too short, and the effect of accelerating the heat exchange of the heat exchanger cannot be realized; if the second duration is too long, the noise will be too high, reducing user experience.
Therefore, the preferred value range of the second duration is 30s-120s, so that the effect of accelerating heat exchange of the heat exchanger can be realized, and reduction of user experience is avoided.
Optionally, after the first duration, a second start instruction is sent to the compressor, and after the compressor is controlled to start, the control unit is further configured to control the compressor to operate at a first frequency.
When the existing air conditioner is started for heating at a low temperature, after a second starting instruction sent by an indoor unit is received, the compressor is usually gradually increased from low to high at a fixed frequency, and the speed for improving the slow heat exchange effect is low. This embodiment is when the compressor just starts, and the control compressor is with first frequency operation, because the system is when not starting, and the inside refrigeration oil of compressor is more, and consequently the compressor is with higher frequency operation in the short time, and the functioning speed of compressor is limited, and the oil extraction volume is not big, can not produce the reliability risk, and the frequency of control compressor this moment promotes higher value, helps establishing the system superheat degree fast, promotes the heat transfer effect.
Like this, this embodiment controls the compressor and with higher frequency operation after the compressor starts, helps establishing the system superheat degree fast, promotes the heat transfer effect, and then helps realizing that the air conditioner heats the quick heating of starting at a low temperature.
Optionally, after controlling the compressor to operate at the first frequency, the control unit is further configured to reduce the operating frequency of the compressor to the second frequency after a third duration, and control the compressor to operate at the second frequency for a fourth duration.
Wherein the first frequency is greater than the second frequency. After the compressor is operated at the second frequency for a fourth time period, the frequency of the compressor is adjusted according to the existing normal control.
When the air conditioner is started at low temperature for heating, if the compressor is always operated at the first frequency, the oil discharge amount is too large, and the reliability of the system is affected. According to the embodiment, after the compressor runs for the third time length at the first frequency, the compressor is controlled to run for the fourth time length at the second frequency, the running frequency of the compressor can be reduced when the oil discharge amount is increased to a certain degree, the oil discharge amount is reduced, and therefore the reliability of the system is guaranteed.
Thus, the embodiment can ensure the reliability of the system while realizing quick heating at low-temperature start.
Optionally, the value range of the first frequency is 35Hz to 50 Hz.
If the first frequency is too low, the superheat degree of the system cannot be quickly established, and the heat exchange effect of the heat exchanger cannot be further improved; if the first frequency is too high, the oil discharge amount of the compressor is too high, and a reliability risk is generated.
Therefore, the preferred value range of the first frequency is 35Hz-50Hz, the value of the first frequency is better, the superheat degree of the system can be quickly established, the heat exchange effect is improved, and the reliability risk of the system can be avoided.
Optionally, the value range of the third duration is 30s to 120 s.
If the third time is too short, the superheat degree of the system cannot be quickly established, and the heat exchange effect of the heat exchanger cannot be improved; if the third time is too long, the oil discharge amount of the compressor is too large, and a reliability risk is generated.
Therefore, in the embodiment, the preferable value range of the third time duration is 30-120 s, the value of the third time duration is better, the superheat degree of the system can be quickly established, the heat exchange effect is improved, and the reliability risk of the system can be avoided.
Optionally, the value range of the second frequency is 20Hz to 34 Hz.
If the second frequency is too low, the heat exchange effect is reduced, and the rapid heating of the system is influenced; if the second frequency is too high, the oil discharge rate of the compressor cannot be effectively reduced.
Therefore, the preferred value range of the second frequency is 20Hz to 34Hz, the value of the second frequency is better, the oil discharge rate of the compressor can be effectively reduced on the premise of not influencing the rapid heating of the system, and the reliability of the system is favorably improved.
Optionally, the value range of the fourth duration is 30s to 120 s.
If the fourth time is too long and too short, the oil discharge rate of the compressor cannot be effectively reduced; if the fourth time length is too long, the heat exchange effect is reduced, and the rapid heating of the system is influenced.
Therefore, in the embodiment, the preferable value range of the fourth time duration is 30-120 s, and the value of the fourth time duration is better, so that the oil discharge rate of the compressor can be effectively reduced on the premise of not influencing the rapid heating of the system, and the reliability of the system is favorably improved.
Optionally, the value range of the fifth duration is 10s to 60 s.
If the fifth time is too short, the refrigerant in the outdoor heat exchanger does not exchange heat sufficiently, and the effect of increasing the temperature rise speed of the heat exchanger is difficult to achieve; if the fifth time is too long, the waiting time for opening the electronic expansion valve is too long, which easily causes the low voltage of the system to be too low, and generates the reliability risk.
In this way, in this embodiment, it is preferable that the value range of the fifth time period is 10s to 60s, and the value of the fifth time period is more preferable, so that the occurrence of a reliability risk can be avoided on the premise of realizing quick heating of low-temperature heating start of the air conditioner.
Optionally, after the fifth time period and after the electronic expansion valve of the outdoor unit is opened, the control unit is further configured to control the electronic expansion valve to operate for a sixth time period in the initial number of steps.
And after the electronic expansion valve is controlled to operate for the sixth time period in the initial steps, the opening degree of the electronic expansion valve is adjusted according to normal control.
When the existing air conditioner is started for heating at a low temperature, after a starting instruction sent by an indoor unit is received, an electronic expansion valve of the outdoor unit generally operates according to a set step number to prevent system fluctuation, but the electronic expansion valve is not used for controlling to the maximum extent to establish the superheat degree of the system, so that the heat exchange effect is improved.
Therefore, after the electronic expansion valve is opened, the electronic expansion valve is controlled to operate for the sixth time period in the initial steps, the control of the electronic expansion valve can be utilized to the maximum extent to establish the superheat degree of the system, and the heat exchange effect is improved.
Optionally, the value range of the initial step number is 150pls to 300 pls.
Where "pls" is a unit "step" of the opening degree of the electronic expansion valve.
If the opening degree of the electronic expansion valve is too small, the low pressure is easy to be too low, and the reliability risk is generated; if the opening degree of the electronic expansion valve is too large, the refrigerant returns to the compressor too much, the superheat degree of the system cannot be established, heat exchange is affected, and quick heating cannot be realized.
Therefore, in the embodiment, the preferred value range of the initial step is 150-300 pls, the initial step is better, the superheat degree of the system can be quickly established, the heat exchange effect is improved, and the system is prevented from generating a reliability risk.
Optionally, the value range of the sixth duration is 30s to 120 s.
The embodiment also provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium stores a computer program, and when the computer program is read and executed by the processor, the air conditioner low-temperature heating starting control method is realized.
Like this, the air conditioner of this embodiment can be under the prerequisite that guarantees that the system oil extraction volume is low quick the system superheat degree of establishing, promotes the heat transfer effect, has guaranteed the reliability of system, has realized the quick heating of air conditioner low temperature heating start-up.
The present embodiment also provides a computer-readable storage medium, where a computer program is stored, and when the computer program is read and executed by a processor, the computer program implements any one of the above-mentioned air conditioner low-temperature heating starting control methods.
Therefore, the computer readable storage medium of the embodiment can quickly establish the superheat degree of the system on the premise of ensuring the low oil discharge amount of the system, improve the heat exchange effect, ensure the reliability of the system and realize the quick heating of the low-temperature heating start of the air conditioner.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A low-temperature heating starting control method of an air conditioner is characterized by comprising the following steps:
acquiring an ambient temperature;
when the environment temperature is lower than the set temperature, a first starting instruction is sent to a fan of an outdoor unit, and the fan is controlled to start and operate at the highest rotating speed;
after the first time, sending a second starting instruction to the compressor to control the compressor to start;
after the first duration, sending a second start instruction to the compressor, and after controlling the start of the compressor, the method further includes:
and after the fifth time, opening an electronic expansion valve of the outdoor unit.
2. The method for controlling low-temperature heating startup of an air conditioner according to claim 1, wherein when the ambient temperature is less than the set temperature, a first startup command is sent to a fan of an outdoor unit, and after the fan is controlled to start up and operate at the highest rotation speed, the method further comprises:
and after the second time, controlling the fan to operate at a preset noise tolerance rotating speed.
3. The method for controlling low-temperature heating starting of an air conditioner according to claim 1, wherein after the first period of time, a second starting instruction is sent to the compressor, and after the compressor is controlled to be started, the method further comprises:
controlling the compressor to operate at a first frequency.
4. The method for controlling low-temperature heating start of an air conditioner according to claim 3, further comprising, after controlling the compressor to operate at the first frequency:
and after the third time period, reducing the operating frequency of the compressor to a second frequency, and controlling the compressor to operate at the second frequency for a fourth time period, wherein the second frequency is less than the first frequency.
5. The method for controlling starting of heating system of air conditioner as claimed in any of claims 1-4, further comprising after the fifth period of time, opening an electronic expansion valve of the outdoor unit, the method further comprising:
and controlling the electronic expansion valve to operate for a sixth time period in the initial steps.
6. The method for controlling the low-temperature heating starting of the air conditioner according to claim 4, wherein the first frequency ranges from 35Hz to 50 Hz;
or the value range of the second frequency is 20Hz-34 Hz.
7. The method for controlling the starting of the low-temperature heating of the air conditioner according to any one of claims 1 to 4, wherein the first time period ranges from 10s to 60 s.
8. The utility model provides an air conditioner low temperature heats start control device which characterized in that includes:
a control unit for acquiring an ambient temperature;
the control unit is also used for sending a first starting instruction to a fan of the outdoor unit when the ambient temperature is lower than the set temperature, and controlling the fan to start and operate at the highest rotating speed;
the control unit is also used for sending a second starting instruction to the compressor after the first time length, and controlling the compressor to start;
and after the first time period, sending a second starting instruction to the compressor to control the compressor to be started, wherein the control unit is also used for opening the electronic expansion valve of the outdoor unit after a fifth time period.
9. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method of any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method according to any one of claims 1-7.
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| CN201910920409.8A CN110425700B (en) | 2019-09-27 | 2019-09-27 | Air conditioner low-temperature heating starting control method and device and air conditioner |
| PCT/CN2020/078220 WO2021056973A1 (en) | 2019-09-27 | 2020-03-06 | Method and device for controlling low-temperature heating startup of air conditioner, air conditioner, and storage medium |
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| CN201910920409.8A CN110425700B (en) | 2019-09-27 | 2019-09-27 | Air conditioner low-temperature heating starting control method and device and air conditioner |
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| CN111765606A (en) * | 2020-06-10 | 2020-10-13 | 海信（山东）空调有限公司 | Method for controlling low-temperature heating start of air conditioner, air conditioner and storage medium |
| CN114110975A (en) * | 2021-11-11 | 2022-03-01 | 珠海格力电器股份有限公司 | Control method and device of air conditioner, storage medium and air conditioner |
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| JP2005016802A (en) * | 2003-06-25 | 2005-01-20 | Fujitsu General Ltd | Air-conditioner control method |
| CN103017294B (en) * | 2012-12-05 | 2014-11-12 | 宁波奥克斯电气有限公司 | Heating start method of multi-split air conditioner |
| CN107677005B (en) * | 2017-09-22 | 2020-05-29 | 青岛海尔空调器有限总公司 | Control method and system of air conditioner under low-temperature heating working condition |
| CN107631430B (en) * | 2017-09-22 | 2020-09-25 | 青岛海尔空调器有限总公司 | Control method and system of air conditioner under low-temperature heating working condition |
| JP6620800B2 (en) * | 2017-10-30 | 2019-12-18 | ダイキン工業株式会社 | Air conditioner |
| CN108758972B (en) * | 2018-05-16 | 2020-12-22 | 广东美的制冷设备有限公司 | Air conditioner heating and defrosting control method, air conditioner and storage medium |
| CN109253530B (en) * | 2018-08-24 | 2019-07-26 | 宁波奥克斯电气股份有限公司 | Heat-production control method and air conditioner |
| CN110030694B (en) * | 2019-04-03 | 2021-04-20 | 青岛海尔空调器有限总公司 | Control method of air conditioner under low-temperature heating working condition |
| CN110243051A (en) * | 2019-06-21 | 2019-09-17 | 宁波奥克斯电气股份有限公司 | A kind of control method of low-temperature heating of variable frequency air conditioner, system and air-conditioning |
| CN110425700B (en) * | 2019-09-27 | 2020-04-24 | 宁波奥克斯电气股份有限公司 | Air conditioner low-temperature heating starting control method and device and air conditioner |
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