CN106225171B - Fan control method for shutdown of air conditioner and air conditioner - Google Patents
Fan control method for shutdown of air conditioner and air conditioner Download PDFInfo
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Abstract
The invention relates to the technical field of air conditioners, in particular to a fan control method for shutdown of an air conditioner and the air conditioner. The fan control method when the air conditioner is stopped comprises the following steps: s1, when the air conditioner control system receives a shutdown instruction, respectively detecting the temperature of the heat exchange coil of the outdoor unit and the outdoor environment temperature; s2, calculating the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature; s3, if the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature is not less than a preset value, the fan of the outdoor unit keeps running; and if the absolute value of the difference value between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature is smaller than the set value, stopping the running of the fan of the outdoor unit. The continuous operation time of the fan is accurately controlled, the phenomenon that the energy consumption is increased due to too long operation time of the fan or the effect of balancing the system pressure cannot be achieved due to too short operation time of the fan is avoided, the energy consumption is saved, and the intelligent control system is more intelligent.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a fan control method for shutdown of an air conditioner and the air conditioner.
Background
The conventional heat pump air conditioning system is often accompanied by the shutdown of the compressor and the fan during the shutdown process. When the heating function of the air conditioner is started, the heat exchanger of the outdoor unit of the air conditioner is in a low-temperature and low-pressure state, and after the system is normally stopped, a refrigerant is easy to accumulate in the outdoor heat exchanger. When the system is restarted, the stored refrigerant can cause air suction resistance, so that the refrigerant and oil are difficult to flow back in the starting process of the system, the air suction pressure is too low to exceed the use range of the compressor in the starting process, or the low-pressure protection of the compressor is caused. When the air conditioner starts a cooling function, after the system is normally stopped, the refrigerant is easily accumulated in the indoor heat exchanger accordingly.
In order to solve the hidden trouble caused by the large pressure difference between the indoor heat exchanger and the outdoor heat exchanger in the system after the air conditioner stops refrigerating or heating, the problem that the air conditioner is difficult to solve when the set delay time is too short is solved by adopting the delay fan stop working time in the prior art mostly, but some air conditioners in the prior art do not set fan delay or set a delay time at will, and the energy consumption of the air conditioner is increased when the set delay time is too long and the fan runs for a long time.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem that the control of the delay time of a fan is inaccurate when an air conditioner is shut down in the prior art.
(II) technical scheme
In order to solve the technical problem, the invention provides a fan control method when an air conditioner is shut down, which comprises the following steps:
s1, when the air conditioner control system receives the stop instruction, respectively detecting the temperature of the heat exchange coil of the indoor unit and the indoor environment temperature, and/or respectively detecting the temperature of the heat exchange coil of the outdoor unit and the outdoor environment temperature;
s2, calculating the absolute value of the difference between the temperature of the heat exchanger coil of the indoor unit and the indoor environment temperature, and/or calculating the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature;
s3, if the absolute value of the difference between the temperature of the heat exchanger coil of the indoor unit and the indoor environment temperature and/or the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature is not less than a preset value, the fan of the indoor unit and/or the fan of the outdoor unit keeps running; and if the absolute value of the difference between the temperature of the heat exchanger coil of the indoor unit and the indoor environment temperature and/or the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature is smaller than a set value, stopping the operation of the fan of the indoor unit and/or the fan of the outdoor unit.
According to the invention, the set value is a fixed value or a dynamic value, and the calculation formula of the dynamic value is as follows:
in the formula, a is a set value; t isCThe temperature of the heat exchange coil of the indoor unit or the heat exchange coil of the outdoor unit when the shutdown instruction is received; t isEIs an indoor ambient temperature or an outdoor ambient temperature; and set is the set control coefficient.
According to the invention, the set value is 2.
According to the invention, the control factor is 4.
The invention also provides an air conditioner, which comprises an outdoor fan, an outdoor heat exchange coil, an indoor fan, an indoor heat exchange coil, a control unit, a first temperature sensor for detecting the outdoor environment temperature, a second temperature sensor for detecting the outdoor heat exchange coil, and/or a third temperature sensor for detecting the indoor environment temperature and a fourth temperature sensor for detecting the indoor heat exchange coil; the control unit is connected with the first temperature sensor, the second temperature sensor and the outdoor fan, and/or is connected with the third temperature sensor, the fourth temperature sensor and the indoor fan; the control unit comprises a signal receiving module and a data processing module, wherein the signal receiving module is used for receiving detected signals of the first temperature sensor and the second temperature sensor and/or receiving detected signals of the third temperature sensor and the fourth temperature sensor; the data processing module is used for calculating an absolute value of a difference value between a temperature value detected by the first temperature sensor and a temperature value detected by the second temperature sensor, and/or calculating an absolute value of a difference value between a temperature value detected by the third temperature sensor and a temperature value detected by the fourth temperature sensor, comparing the absolute value of the difference value between the temperature value detected by the first temperature sensor and the temperature value detected by the second temperature sensor and/or the absolute value of the difference value between the temperature value detected by the third temperature sensor and the temperature value detected by the fourth temperature sensor with a set value, and controlling the indoor fan and/or the outdoor fan to keep running or stop running according to a comparison result.
According to the invention, the second temperature sensor and/or the fourth temperature sensor is a thermistor temperature sensor.
(III) advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages: the fan control method for the shutdown of the air conditioner provided by the embodiment of the invention can be used for controlling the fan of the indoor unit or the fan of the outdoor unit, and controlling the fan of the indoor unit or the fan of the outdoor unit to keep running or stop running according to the difference value between the temperature of the heat exchange coil and the ambient temperature. The working principle of the fan control method of the outdoor unit is the same as that of the fan control method of the indoor unit, and when the absolute value of the difference value between the temperature of the coil pipe of the heat exchanger and the ambient temperature is small, a relative pressure balance is achieved in the air conditioning system. The method has the advantages that the continuous operation time of the fan is accurately controlled after the stop instruction is received according to the fact that whether the absolute value of the difference value between the temperature of the coil pipe of the heat exchanger and the ambient temperature is smaller than the set value or not, the effect that the pressure of the system cannot be balanced due to the fact that the operation time of the fan is too long and the energy consumption is increased or the operation time is too short is avoided, energy consumption is saved, and the method is more.
Drawings
Fig. 1 is a control logic diagram of a fan control method when an air conditioner is shut down according to an embodiment of the present invention;
fig. 2 is a control logic diagram of a fan control method when an air conditioner is shut down according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a fan control method for shutdown of an air conditioner, which comprises the following steps:
s1, when the air conditioner control system receives the stop instruction, respectively detecting the temperature of the heat exchange coil of the indoor unit and the indoor environment temperature, and/or respectively detecting the temperature of the heat exchange coil of the outdoor unit and the outdoor environment temperature;
s2, calculating the absolute value of the difference between the temperature of the heat exchanger coil of the indoor unit and the indoor environment temperature, and/or calculating the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature;
s3, if the absolute value of the difference between the temperature of the heat exchanger coil of the indoor unit and the indoor environment temperature and/or the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature is not less than a preset value, the fan of the indoor unit and/or the fan of the outdoor unit keeps running; and if the absolute value of the difference between the temperature of the heat exchanger coil of the indoor unit and the indoor environment temperature and/or the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature is smaller than a set value, stopping the operation of the fan of the indoor unit and/or the fan of the outdoor unit.
The fan control method for the shutdown of the air conditioner provided by the embodiment of the invention can be used for controlling the fan of the indoor unit or the fan of the outdoor unit, and controlling the fan of the indoor unit or the fan of the outdoor unit to keep running or stop running according to the difference value between the temperature of the heat exchange coil and the ambient temperature. It should be understood by those skilled in the art that when the fan of the indoor unit is controlled, the absolute value of the difference between the temperature of the heat exchange coil of the indoor unit and the ambient temperature is determined, and when the fan of the outdoor unit is controlled, the absolute value of the difference between the temperature of the heat exchange coil of the outdoor unit and the ambient temperature is determined. The working principle of the fan control method of the outdoor unit is the same as that of the fan control method of the indoor unit, when the absolute value of the difference value between the temperature of the coil pipe of the heat exchanger and the ambient temperature is small, the relative pressure balance is achieved in the air conditioning system, for example, when heating is carried out, the outdoor heat exchange coil pipe is at low temperature and low pressure, the temperature of the outdoor heat exchange coil pipe rises after the fan continues to operate for a period of time, and the pressure rises along with the temperature, so that the internal pressure of the system reaches a relative balance. The method has the advantages that the continuous operation time of the fan is accurately controlled after the stop instruction is received according to the fact that whether the absolute value of the difference value between the temperature of the coil pipe of the heat exchanger and the ambient temperature is smaller than the set value or not, the effect that the pressure of the system cannot be balanced due to the fact that the operation time of the fan is too long and the energy consumption is increased or the operation time is too short is avoided, energy consumption is saved, and the method is more. In order to ensure the comfort experience of the user, preferably, the fan of the outdoor unit is controlled, and the fan of the outdoor unit is continuously operated for a period of time after the user selects to stop the machine, so that no adverse effect is caused to the user.
Further, the set value in this embodiment may be a fixed value. Preferably, the set value in the present embodiment is 2. Namely, when the absolute value of the difference between the temperature of the heat exchange coil and the ambient temperature is less than 2, the system pressure is balanced, and the operation of the fan is stopped.
Specifically, the set value in this embodiment may also be a dynamic numerical value, and the calculation formula of the dynamic numerical value is as follows:
in the formula, a is a set value; t isCThe temperature of the heat exchange coil of the indoor unit or the heat exchange coil of the outdoor unit when the shutdown instruction is received; t isEIs an indoor ambient temperature or an outdoor ambient temperature; and set is the set control coefficient. Specifically, the control coefficient may be according to the type of the outdoor unit and the size of the air conditioner numberDifferent settings are made. The processing of the calculated setting value decimal number may be performed in an integer manner.
Preferably, the control coefficient in this embodiment is 4. For example, if the temperature of the heat exchange coil of the outdoor unit is 50 ℃ and the outdoor environment temperature is 35 ℃ when the shutdown instruction is received, the set value is 3, and the fan of the outdoor unit needs to be controlled to continuously operate until the temperature of the heat exchange coil of the outdoor unit is 38 ℃, and then the operation of the fan of the outdoor unit is stopped. If the temperature of the heat exchange coil of the outdoor unit is-7 ℃ and the outdoor environment temperature is-2 ℃ when the shutdown instruction is received, the set value is 1, and the fan of the outdoor unit needs to be controlled to continuously operate until the temperature of the heat exchange coil of the outdoor unit is-3 ℃, and the operation of the fan of the outdoor unit is stopped. The set value is set to be a dynamic numerical value, so that the control is more accurate, and the energy consumption is saved.
The embodiment of the invention also provides an air conditioner, which comprises an outdoor fan, an outdoor unit heat exchange coil, an indoor fan, an indoor unit heat exchange coil, a control unit, a first temperature sensor for detecting the outdoor environment temperature, a second temperature sensor for detecting the outdoor unit heat exchange coil, and/or a third temperature sensor for detecting the indoor environment temperature and a fourth temperature sensor for detecting the indoor unit heat exchange coil; the control unit is connected with the first temperature sensor, the second temperature sensor and the outdoor fan and/or connected with the third temperature sensor, the fourth temperature sensor and the indoor fan; the control unit comprises a signal receiving module and a data processing module, wherein the signal receiving module is used for receiving detected signals of the first temperature sensor and the second temperature sensor and/or receiving detected signals of the third temperature sensor and the fourth temperature sensor; the data processing module is used for calculating the absolute value of the difference value between the temperature value detected by the first temperature sensor and the temperature value detected by the second temperature sensor, and/or calculating the absolute value of the difference value between the temperature value detected by the third temperature sensor and the temperature value detected by the fourth temperature sensor, comparing the absolute value of the difference value between the temperature value detected by the first temperature sensor and the temperature value detected by the second temperature sensor and/or the absolute value of the difference value between the temperature value detected by the third temperature sensor and the temperature value detected by the fourth temperature sensor with a set value, and controlling the indoor fan and/or the outdoor fan to keep running or stop running according to the comparison result.
Further, the second temperature sensor and/or the fourth temperature sensor in the present embodiment is a thermistor temperature sensor.
In order to clearly illustrate the technical solution of the present invention, the following embodiments are given:
example one
The embodiment provides a fan control method for an indoor unit during shutdown of an air conditioner, as shown in fig. 1, including the following steps:
s1, when the air conditioner control system receives a shutdown instruction, respectively detecting the temperature of a heat exchange coil of the indoor unit and the indoor environment temperature;
s2, calculating the absolute value of the difference between the temperature of the heat exchanger coil of the indoor unit and the indoor environment temperature;
s3, if the absolute value of the difference between the temperature of the heat exchanger coil of the indoor unit and the indoor environment temperature is not less than a preset value, the fan of the indoor unit keeps running; and if the absolute value of the difference value between the temperature of the heat exchanger coil of the indoor unit and the indoor environment temperature is smaller than the set value, stopping the operation of the fans of the indoor unit and/or the outdoor unit.
The working principle of the fan control method of the indoor unit when the air conditioner is stopped provided by the embodiment of the invention is that when the absolute value of the difference value between the temperature of the heat exchanger coil of the indoor unit and the temperature of the indoor environment is small, the relative pressure balance is achieved in the air conditioning system, for example, when heating is carried out, the indoor heat exchange coil is at high temperature and high pressure, the temperature of the indoor heat exchange coil is reduced after the fan continues to operate for a period of time, the pressure is reduced, and therefore the internal pressure of the system is enabled to achieve a relative balance state. The method has the advantages that the continuous operation time of the fan of the indoor unit is accurately controlled after the stop instruction is received according to the fact that whether the absolute value of the difference value between the temperature of the coil pipe of the heat exchanger and the ambient temperature is smaller than the set value or not, the effect that the pressure of the system cannot be balanced due to the fact that the operation time of the fan is too long and the energy consumption is increased or the operation time is too short is avoided, energy consumption is saved, and the method.
Further, the set value in this embodiment may be a fixed value. Preferably, the set value in the present embodiment is 2. Namely, when the absolute value of the difference between the temperature of the heat exchange coil and the ambient temperature is less than 2, the system pressure is balanced, and the operation of the fan is stopped.
Specifically, the set value in this embodiment may also be a dynamic numerical value, and the calculation formula of the dynamic numerical value is as follows:
in the formula, a is a set value; t isCThe temperature of the heat exchange coil of the indoor unit when the shutdown instruction is received; t isEIs the indoor ambient temperature; and set is the set control coefficient. Specifically, the control coefficient may be set differently according to the type of the outdoor unit and the size of the air conditioner. The processing of the calculated setting value decimal number may be performed in an integer manner. Preferably, the control coefficient in this embodiment is 4.
The embodiment also provides an air conditioner adopting the control method, which comprises an outdoor fan, an outdoor unit heat exchange coil, an indoor fan, an indoor unit heat exchange coil, a control unit, a third temperature sensor for detecting the indoor environment temperature and a fourth temperature sensor for detecting the indoor unit heat exchange coil; the control unit is connected with the third temperature sensor, the fourth temperature sensor and the indoor fan; the control unit comprises a signal receiving module and a data processing module, wherein the signal receiving module is used for receiving the detected signals of the third temperature sensor and the fourth temperature sensor; the data processing module is used for calculating the absolute value of the difference value between the temperature value detected by the third temperature sensor and the temperature value detected by the fourth temperature sensor, comparing the absolute value of the difference value between the temperature value detected by the third temperature sensor and the temperature value detected by the fourth temperature sensor with a set value, and controlling the indoor fan to keep running or stop running according to the comparison result.
Further, the fourth temperature sensor in the present embodiment is a thermistor temperature sensor.
Example two
The embodiment provides a method for controlling a fan of an outdoor unit when an air conditioner is stopped, as shown in fig. 2, the method includes the following steps:
s1, when the air conditioner control system receives a shutdown instruction, respectively detecting the temperature of the heat exchange coil of the outdoor unit and the outdoor environment temperature;
s2, calculating the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature;
s3, if the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature is not less than a preset value, the fan of the outdoor unit keeps running; and if the absolute value of the difference value between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature is smaller than the set value, stopping the operation of the outdoor unit and/or the fan of the outdoor unit.
The working principle of the method for controlling the fan of the outdoor unit when the air conditioner is stopped provided by the embodiment of the invention is that when the absolute value of the difference value between the temperature of the heat exchanger coil of the outdoor unit and the temperature of the outdoor environment is smaller, the relative pressure balance is achieved in the air conditioning system, for example, when heating is carried out, the outdoor heat exchange coil is at high temperature and high pressure, the temperature of the outdoor heat exchange coil is reduced after the fan continues to operate for a period of time, the pressure is reduced, and therefore the internal pressure of the system is in a relative balance state. The method has the advantages that the continuous operation time of the fan of the outdoor unit is accurately controlled after the stop instruction is received according to the fact that whether the absolute value of the difference value between the temperature of the coil pipe of the heat exchanger and the ambient temperature is smaller than the set value or not, the effect that the pressure of the system cannot be balanced due to the fact that the operation time of the fan is too long and the energy consumption is increased or the operation time is too short is avoided, energy consumption is saved, and the method.
Further, the set value in this embodiment may be a fixed value. Preferably, the set value in the present embodiment is 2. Namely, when the absolute value of the difference between the temperature of the heat exchange coil and the ambient temperature is less than 2, the system pressure is balanced, and the operation of the fan is stopped.
Specifically, the set value in this embodiment may also be a dynamic numerical value, and the calculation formula of the dynamic numerical value is as follows:
in the formula, a is a set value; t isCThe temperature of the heat exchange coil of the outdoor unit when the shutdown instruction is received; t isEIs the outdoor ambient temperature; and set is the set control coefficient. Specifically, the control coefficient may be set differently according to the type of the outdoor unit and the size of the air conditioner. The processing of the calculated setting value decimal number may be performed in an integer manner. Preferably, the control coefficient in this embodiment is 4. For example, if the temperature of the heat exchange coil of the outdoor unit is 50 ℃ and the outdoor environment temperature is 35 ℃ when the shutdown instruction is received, the set value is 3, and the fan of the outdoor unit needs to be controlled to continuously operate until the temperature of the heat exchange coil of the outdoor unit is 38 ℃, and then the operation of the fan of the outdoor unit is stopped. If the temperature of the heat exchange coil of the outdoor unit is-7 ℃ and the outdoor environment temperature is-2 ℃ when the shutdown instruction is received, the set value is 1, and the fan of the outdoor unit needs to be controlled to continuously operate until the temperature of the heat exchange coil of the outdoor unit is-3 ℃, and the operation of the fan of the outdoor unit is stopped. The set value is set to be a dynamic numerical value, so that the control is more accurate, and the energy consumption is saved.
The embodiment also provides an air conditioner adopting the control method, which comprises an outdoor fan, an outdoor unit heat exchange coil, an indoor fan, an indoor unit heat exchange coil, a control unit, a first temperature sensor for detecting the outdoor environment temperature and a second temperature sensor for detecting the outdoor unit heat exchange coil; the control unit is connected with the first temperature sensor, the second temperature sensor and the outdoor fan; the control unit comprises a signal receiving module and a data processing module, wherein the signal receiving module is used for receiving detected signals of the first temperature sensor and the second temperature sensor; the data processing module is used for calculating the absolute value of the difference value between the temperature value detected by the first temperature sensor and the temperature value detected by the second temperature sensor, comparing the absolute value of the difference value between the temperature value detected by the first temperature sensor and the temperature value detected by the second temperature sensor with a set value, and controlling the outdoor fan to keep running or stop running according to the comparison result.
Further, the fourth temperature sensor in the present embodiment is a thermistor temperature sensor.
EXAMPLE III
In this embodiment, the air conditioner includes an outdoor fan, an outdoor unit heat exchange coil, an indoor fan, an indoor unit heat exchange coil, a control unit, a first temperature sensor for detecting an outdoor environment temperature, a second temperature sensor for detecting the outdoor unit heat exchange coil, a third temperature sensor for detecting an indoor environment temperature, and a fourth temperature sensor for detecting the indoor unit heat exchange coil. The first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor respectively detect the temperatures of the indoor heat exchange coil, the indoor environment, the outdoor heat exchange coil and the outdoor environment, and respectively control the indoor fan and the outdoor fan, wherein the control mode of the indoor fan is the same as that of the first embodiment, the control method of the outdoor fan is the same as that of the second embodiment, and the description is omitted here for the sake of saving the text of the description.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A fan control method when an air conditioner is shut down is characterized by comprising the following steps:
s1, when the air conditioner control system receives the stop instruction, respectively detecting the temperature of the heat exchange coil of the indoor unit and the indoor environment temperature, or respectively detecting the temperature of the heat exchange coil of the outdoor unit and the outdoor environment temperature;
s2, calculating the absolute value of the difference between the temperature of the heat exchanger coil of the indoor unit and the indoor environment temperature, or calculating the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature;
s3, if the absolute value of the difference between the temperature of the heat exchanger coil of the indoor unit and the indoor ambient temperature or the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor ambient temperature is not less than a set value, the fan of the indoor unit or the outdoor unit keeps operating; if the absolute value of the difference between the temperature of the heat exchanger coil of the indoor unit and the indoor environment temperature or the absolute value of the difference between the temperature of the heat exchanger coil of the outdoor unit and the outdoor environment temperature is less than a set value, the fan of the indoor unit or the outdoor unit stops running,
the set value is set as a dynamic numerical value, the dynamic numerical value is a ratio of the absolute value to a control coefficient, and the control coefficient is set differently according to the type of the outdoor unit and the size of the air conditioner matching number.
2. The fan control method when the air conditioner is stopped according to claim 1, characterized in that: the calculation formula of the dynamic numerical value is as follows:
in the formula, a is a set value; t isCThe temperature of the heat exchange coil of the indoor unit or the heat exchange coil of the outdoor unit when the shutdown instruction is received; t isEIs an indoor ambient temperature or an outdoor ambient temperature; and set is the set control coefficient.
3. The fan control method when the air conditioner is stopped according to claim 2, characterized in that: the set value is 2.
4. The fan control method when the air conditioner is stopped according to claim 2, characterized in that: the control coefficient is 4.
5. An air conditioner, characterized in that: comprises an outdoor fan, an outdoor unit heat exchange coil, an indoor fan, an indoor unit heat exchange coil, a control unit, and
the temperature sensor comprises a first temperature sensor for detecting outdoor environment temperature, a second temperature sensor for detecting the heat exchange coil of the outdoor unit, or a third temperature sensor for detecting indoor environment temperature and a fourth temperature sensor for detecting the heat exchange coil of the indoor unit;
the control unit is connected with the first temperature sensor, the second temperature sensor and the outdoor fan, or connected with the third temperature sensor, the fourth temperature sensor and the indoor fan;
the control unit comprises a signal receiving module and a data processing module, wherein the signal receiving module is used for receiving detected signals of the first temperature sensor and the second temperature sensor or receiving detected signals of the third temperature sensor and the fourth temperature sensor; the data processing module is used for calculating the absolute value of the difference value between the temperature value detected by the first temperature sensor and the temperature value detected by the second temperature sensor, or is used for calculating the absolute value of the difference value between the temperature value detected by the third temperature sensor and the temperature value detected by the fourth temperature sensor, comparing the absolute value of the difference value between the temperature value detected by the first temperature sensor and the temperature value detected by the second temperature sensor or the absolute value of the difference value between the temperature value detected by the third temperature sensor and the temperature value detected by the fourth temperature sensor with a set value, and controls the indoor fan or the outdoor fan to keep running or stop running according to the comparison result, wherein the set value is set as a dynamic value, the dynamic value is a ratio of the absolute value to a control coefficient, and the control coefficient is set differently according to the type of the outdoor unit and the size of the air conditioner.
6. The air conditioner according to claim 5, wherein: the second temperature sensor and/or the fourth temperature sensor are/is a thermistor temperature sensor.
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| CN109654651B (en) * | 2018-11-13 | 2020-12-18 | 珠海格力电器股份有限公司 | Control method and system for identifying space heat load and storage medium |
| CN110145837B (en) * | 2019-04-19 | 2020-11-27 | 青岛海尔空调器有限总公司 | Air conditioner and control method thereof |
| CN113203173B (en) * | 2021-05-21 | 2022-04-22 | 宁波奥克斯电气股份有限公司 | Shutdown differential pressure balance control method and device, air conditioner and computer readable storage medium |
| CN113606739B (en) * | 2021-08-20 | 2022-08-12 | 宁波奥克斯电气股份有限公司 | Control method and device for air conditioner shutdown differential pressure balance and multi-split air conditioner |
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| CN105444328A (en) * | 2014-07-21 | 2016-03-30 | 青岛海尔空调器有限总公司 | Air conditioner shut down control method |
| CN105042782A (en) * | 2015-07-24 | 2015-11-11 | 美的集团武汉制冷设备有限公司 | Control method and device of air conditioner |
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