CN115420000A - Control method and device for outdoor fan of air conditioner, air conditioner and storage medium - Google Patents

Abstract

The invention discloses a control method and a control device for an outdoor fan of an air conditioner, the air conditioner and a computer readable storage medium, wherein the method comprises the following steps: acquiring the outlet temperature of a condenser and the temperature of a refrigerant radiating pipe; determining the actual outlet temperature of the condenser according to the outlet temperature of the condenser and the temperature of the refrigerant radiating pipe; and adjusting the rotating speed of the outdoor fan according to the outdoor environment temperature and the actual condenser outlet temperature. By applying the control method of the outdoor fan of the air conditioner to the air conditioner, the technical problem of poor refrigerating effect of the air conditioner caused by refrigerant deposition of an outdoor unit of the air conditioner can be solved, and comfort level experience of a user is improved.

Description

Control method and device for outdoor fan of air conditioner, air conditioner and storage medium

technical field

The present invention relates to the technical field of air conditioning, in particular to a method and device for controlling an outdoor fan of an air conditioner, an air conditioner and a computer-readable storage medium.

Background technique

At present, in non-pressure-controlled heat pump air-conditioning systems, the control of the outdoor unit fan during cooling is mainly based on the condenser outlet temperature to control the speed of the outdoor fan. It is set on the outlet at the bottom of the condenser.

For some areas, there is also a cooling demand at a low outdoor ambient temperature. At this time, the outdoor condenser is prone to refrigerant deposition; and when the multi-connector is under a small load cooling demand, the bottom condenser is also prone to refrigerant deposition. At this time, the condenser outlet sensor cannot truly feedback the entire condensing outlet temperature, so changing the outdoor fan only according to the existing condenser outlet temperature will cause the control feedback to lag, and then it is easy to trigger the system overpressure protection, affecting the cooling effect of the air conditioner .

Contents of the invention

The main purpose of the present invention is to provide a control method and device for an outdoor fan of an air conditioner, an air conditioner and a computer-readable storage medium, aiming at solving the technical problem that the cooling effect of the air conditioner is poor due to the deposition of refrigerant in the outdoor unit of the air conditioner.

In order to achieve the above object, the present invention provides a method for controlling the outdoor fan of an air conditioner, which obtains the outlet temperature of the condenser and the temperature of the refrigerant cooling pipe;

Determine the actual condenser outlet temperature according to the condenser outlet temperature and the refrigerant cooling pipe temperature;

Adjusting the speed of the outdoor fan according to the outdoor ambient temperature and the actual condenser outlet temperature.

Optionally, the step of determining the actual condenser outlet temperature according to the condenser outlet temperature and the refrigerant cooling pipe temperature includes:

Obtaining a first difference between the temperature of the cooling pipe of the refrigerant and the outlet temperature of the condenser;

When the first difference is greater than or equal to a first temperature threshold, it is determined that the temperature of the refrigerant cooling pipe is the actual condenser outlet temperature;

When the first difference is smaller than the first temperature threshold, it is determined that the condenser outlet temperature is the actual condenser outlet temperature.

Optionally, the step of adjusting the speed of the outdoor fan according to the outdoor ambient temperature and the actual condenser outlet temperature includes:

Determine the target condenser temperature range according to the outdoor ambient temperature;

Adjusting the rotational speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature.

Optionally, the step of adjusting the speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature includes:

When the actual condenser outlet temperature is within the target condenser temperature range, maintaining the current speed of the outdoor fan;

Go back to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant.

Optionally, the step of adjusting the speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature includes:

When the actual condenser outlet temperature is lower than the minimum threshold of the target condenser temperature range, reduce the current speed of the outdoor fan;

Go back to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant.

Optionally, the step of adjusting the speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature includes:

When the actual condenser outlet temperature is greater than the maximum threshold of the target condenser temperature range, increasing the current speed of the outdoor fan;

Go back to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant.

Optionally, the step of reducing the current speed of the outdoor fan includes:

Decreasing the current rotational speed of the outdoor fan in a stepwise manner until the actual condenser outlet temperature is within the target condenser temperature range or the outdoor fan stops rotating;

Optionally, the step of increasing the current speed of the outdoor fan includes:

Stepwise increase the current speed of the outdoor fan until the actual condenser outlet temperature is within the target condenser temperature range or the outdoor fan reaches a preset maximum speed.

In addition, in order to achieve the above object, the present invention also provides a control device for an outdoor fan of an air conditioner, and the control device for an outdoor fan of an air conditioner includes:

The temperature detection module is used to obtain the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant;

A temperature correction module, configured to determine the actual condenser outlet temperature according to the condenser outlet temperature and the refrigerant cooling pipe temperature;

The working condition adjustment module is used to adjust the speed of the outdoor fan according to the outdoor ambient temperature and the actual condenser outlet temperature.

In addition, in order to achieve the above object, the present invention also provides an air conditioner, including a processor, a memory, and a control program of the outdoor fan of the air conditioner stored on the memory and executable by the processor, wherein the When the control program of the outdoor fan of the air conditioner is executed by the processor, the steps of the above-mentioned method for controlling the outdoor fan of the air conditioner are realized.

The present invention also provides a computer-readable storage medium, the computer-readable storage medium stores the control program of the outdoor fan of the air conditioner, wherein, when the control program of the outdoor fan of the air conditioner is executed by the processor, the above-mentioned The steps of the control method for the outdoor fan of the air conditioner described above.

The control method of the outdoor fan of the air conditioner in the technical solution of the present invention has the steps of: obtaining the outlet temperature of the condenser and the temperature of the refrigerant heat dissipation pipe; determining the actual condenser outlet temperature according to the outlet temperature of the condenser and the temperature of the heat dissipation pipe of the refrigerant; Adjusting the speed of the outdoor fan according to the outdoor ambient temperature and the actual condenser outlet temperature. The invention solves the technical problem that the cooling effect of the air conditioner is poor due to the deposition of refrigerant in the outdoor unit of the air conditioner. At the core, the present invention mainly obtains the two temperatures of the condenser outlet temperature and the temperature of the refrigerant cooling pipe, and compares the two temperatures to determine whether the condenser refrigerant deposition occurs, thereby determining the actual condenser outlet temperature, that is, the cooling time The actual temperature of the refrigerant when it is output from the condenser outlet, thereby eliminating the influence of refrigerant deposition. Control the speed of the outdoor fan according to the actual condenser outlet temperature, so that the feedback of the control of the outdoor fan will not be caused by the refrigerant deposition, and avoid damage to the air conditioner. The false touch of the system pressure over-pressure protection ensures the cooling effect under the condition of refrigerant deposition and improves the user's comfort experience.

Description of drawings

Fig. 1 is a schematic structural view of the hardware operating environment of the air conditioner involved in the embodiment of the present invention;

2 is a schematic flow chart of a first embodiment of a method for controlling an outdoor fan of an air conditioner according to the present invention;

3 is a detailed flow chart of step S20 of the first embodiment of the control method of the outdoor fan of the air conditioner of the present invention;

4 is a detailed flow chart of step S30 of the first embodiment of the control method of the outdoor fan of the air conditioner of the present invention;

5 is a detailed flowchart of step S31 of the first embodiment of the method for controlling the outdoor fan of an air conditioner according to the present invention;

6 is an overall application flow chart of an embodiment of the control method for the outdoor fan of the air conditioner according to the present invention;

7 is a schematic structural view of the outdoor unit of the air conditioning system involved in the control method of the outdoor fan of the air conditioner according to the present invention;

Fig. 8 is a schematic diagram of the frame structure of the control device for the outdoor fan of the air conditioner according to the present invention.

Explanation of reference numbers:

label name label name 1 Outdoor ambient temperature sensor 2 outdoor condenser 3 Condenser outlet temperature sensor 4 filter 5 Electronic expansion valve 6 Refrigerant heat pipe 7 Refrigerant heat pipe temperature sensor 8 heat sink

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Summary of technical solutions of the present invention:

The present invention is mainly aimed at the phenomenon of refrigerant deposition that is easy to occur in the outdoor unit of an air conditioner. By using the condenser outlet temperature sensor and the refrigerant heat dissipation pipe temperature sensor to detect the obtained condenser outlet temperature and refrigerant heat dissipation pipe temperature respectively, and condensate After comparing the outlet temperature of the condenser with the temperature of the refrigerant cooling pipe, the actual condenser outlet temperature that can reflect the actual temperature of the refrigerant output from the outdoor condenser outlet is determined, and then the actual condenser outlet temperature and the detected outdoor ambient temperature are determined. Realize the timely and accurate control and adjustment of the outdoor fan, prevent the system pressure from being too high due to the low temperature of the condenser outlet detected by the deposition of the refrigerant, and prevent false triggering of the system pressure protection, ensuring the cooling effect of the air conditioner and improving the user's use of the air conditioner. comfort experience.

An embodiment of the present invention provides an air conditioner.

As shown in FIG. 1 , FIG. 1 is a schematic structural diagram of the hardware operating environment of the air conditioner involved in the solution of the embodiment of the present invention.

As shown in FIG. 1 , the air conditioner may include: a processor 1001 , such as a CPU, a network interface 1004 , a user interface 1003 , a memory 1005 , and a communication bus 1002 . Wherein, the communication bus 1002 is used to realize connection and communication between these components. The user interface 1003 may include a display (Display), an input unit such as a control panel, and the optional user interface 1003 may also include a standard wired interface and a wireless interface. Optionally, the network interface 1004 may include a standard wired interface and a wireless interface (such as a WIFI interface). The memory 1005 can be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001 . The memory 1005 as a computer storage medium may include a control program of the outdoor fan of the air conditioner.

Those skilled in the art can understand that the hardware structure shown in FIG. 1 does not constitute a limitation on the device, and may include more or less components than those shown in the figure, or combine some components, or arrange different components.

Continuing to refer to FIG. 1 , the memory 1005 as a computer-readable storage medium in FIG. 1 may include an operating system, a user interface module, a network communication module, and a control program for an outdoor fan of an air conditioner.

In Fig. 1, the network communication module is mainly used to connect to the server and perform data communication with the server; and the processor 1001 can call the control program of the outdoor fan of the air conditioner stored in the memory 1005, and execute the steps in the following embodiments.

Based on the above-mentioned hardware structure of the controller, various embodiments of the control method of the outdoor fan of the air conditioner of the present invention are proposed.

An embodiment of the present invention provides a method for controlling an outdoor fan of an air conditioner.

Please refer to FIG. 2, which is a schematic flow chart of the first embodiment of the control method of the outdoor fan of the air conditioner according to the present invention; in the first embodiment of the present invention, the control method includes the following steps:

Step S10, obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant;

In order to facilitate the understanding of the condenser outlet temperature and the refrigerant cooling pipe temperature in this embodiment, please refer to FIG. 7 , which is a schematic structural diagram of the outdoor unit of the air conditioning system involved in the method for controlling the outdoor fan of the air conditioner in the present invention. As shown in Figure 7, the outdoor unit of the air conditioning system (air conditioner) includes an outdoor condenser 2, an electronic expansion valve 5, a filter 4, a refrigerant cooling pipe 6 and a radiator 8, and the upper left of the outdoor condenser 2 Some of them are also provided with an outdoor ambient temperature sensor 1 for detecting the outdoor ambient temperature T4. In addition, the outdoor ambient temperature sensor 1 can also be arranged at other locations. The condenser outlet temperature sensor 3 is arranged at the outlet of the outdoor condenser 2 for detecting and obtaining the outlet temperature T3 of the outdoor condenser 2 , which is actually the refrigerant temperature when the refrigerant is output from the outlet of the outdoor condenser 2 . A refrigerant heat dissipation pipe temperature sensor 7 is arranged on the refrigerant heat dissipation pipe 6 for detecting and obtaining the temperature TL of the refrigerant heat dissipation pipe 6 . It should be noted that FIG. 7 is only an example for understanding the positional relationship of various structural components, and is not a limitation to the structure of the air conditioner.

Based on the above-mentioned air-conditioning structure, the condenser outlet temperature of the outdoor condenser 2 can be obtained through the condenser outlet temperature sensor 3, and at the same time, the temperature of the refrigerant heat dissipation pipe 6 can also be obtained through the refrigerant heat dissipation pipe temperature sensor 7, and the temperature of the refrigerant heat dissipation pipe 6 can be obtained through the outdoor environment The temperature sensor 1 acquires the outdoor ambient temperature of the outside world.

Step S20, determining the actual condenser outlet temperature according to the condenser outlet temperature and the refrigerant cooling pipe temperature;

When the outlet temperature of the condenser and the temperature of the refrigerant radiating pipe are obtained, the detected temperature is transmitted to the main controller of the outdoor unit through the corresponding temperature sensor, and the temperature at the outlet of the condenser and the temperature of the refrigerant radiating pipe are transmitted through the main controller. The temperature is compared with the numerical value to determine whether there is refrigerant precipitation in the condenser of the current outdoor unit. Therefore, when refrigerant precipitation occurs, the temperature of the refrigerant heat dissipation pipe is used as the actual condenser outlet temperature to control the outdoor fan. When no refrigerant precipitation occurs When , use the condenser outlet temperature as the actual condenser outlet temperature to control the outdoor fan.

In order to facilitate the understanding of the technical principle of the present invention for the phenomenon of refrigerant deposition. It needs to be added that when refrigerant precipitation occurs in the outdoor condenser, a large amount of refrigerant is deposited on the outlet side of the bottom of the condenser, making the temperature change at the outlet of the condenser easy to lag or distort, which leads to the fact that the actual fan cannot be effectively controlled. For example, in When the indoor set temperature is increased according to the original set temperature, under normal circumstances, the outlet temperature of the condenser corresponding to the original set temperature is lower (compared to the set temperature after the increase), and the set temperature after the increase A certain temperature corresponds to a higher outlet temperature of the condenser. Once refrigerant deposition occurs, even if the set temperature is increased, the condenser temperature detected by the condenser outlet temperature sensor due to refrigerant deposition is still low. At this time, it is likely that the outlet pressure and operating frequency of the compressor are too high. Large, and then the pressure is too high to protect the frequency of the compressor, which leads to the deterioration of the cooling effect.

Please refer to FIG. 3, in one embodiment, the step S20 includes:

Step S21, obtaining a first difference between the temperature of the cooling pipe of the refrigerant and the outlet temperature of the condenser;

Step S22, when the first difference is greater than or equal to a first temperature threshold, determine that the temperature of the refrigerant cooling pipe is the actual condenser outlet temperature;

Step S23, when the first difference is less than the first temperature threshold, determine that the condenser outlet temperature is the actual condenser outlet temperature.

In this embodiment, the main controller of the outdoor unit can calculate the first difference T1 between the temperature TL of the refrigerant heat dissipation pipe and the outlet temperature T3 of the condenser, that is, TL−T3=T1.

The first temperature threshold D can be set according to the characteristics of different air conditioners, such as 5°C, which is not limited here. It mainly reflects the tolerance of the temperature difference between the temperature of the refrigerant cooling pipe and the outlet temperature of the condenser. If it is less than the first temperature threshold, it means that there is no refrigerant deposition or the phenomenon of refrigerant deposition is relatively slight, which will not affect the control of the outdoor fan. However, if it is greater than or equal to the first temperature threshold, it means that refrigerant deposition has occurred and the refrigerant deposition has seriously affected the control of the outdoor fan. And the greater the temperature of the portion where the first difference T1 exceeds the first temperature threshold D, the more serious the refrigerant deposition phenomenon.

When the first difference is greater than or equal to the first temperature threshold, that is, when TL-T3≥D, it means that refrigerant deposition has occurred and the refrigerant deposition has affected the control of the outdoor fan, and at this time the condenser outlet temperature sensor detects The obtained condenser outlet temperature cannot truly reflect the real temperature of the refrigerant coming out of the entire condenser, so it is necessary to use the condenser heat dissipation pipe temperature detected by the condenser heat dissipation pipe temperature sensor as the actual condenser outlet temperature to control the outdoor fan. The temperature of the cooling pipe of the condenser is not affected by the deposition of refrigerant, and reflects the real temperature of the refrigerant on the outlet side of the condenser, thereby avoiding the hysteresis of the control and adjustment of the outdoor fan, and ensuring that the outdoor fan is controlled and adjusted in time. Cooling effect of air conditioner.

When the first difference is smaller than the first temperature threshold, that is, when TL-T3<D, it means that no refrigerant deposition occurs or slight refrigerant deposition occurs but does not affect the control of the outdoor fan. At this time, the The condenser outlet temperature detected by the condenser outlet temperature sensor is used as the actual condenser outlet temperature, so that it can most accurately reflect the real temperature at the outlet of the refrigerant when there is no refrigerant deposition or slight refrigerant deposition, so that it can be based on the actual refrigerant The temperature is used to precisely control and adjust the outdoor fan to achieve the best cooling effect under the current working conditions.

Step S30, adjusting the rotation speed of the outdoor fan according to the outdoor ambient temperature and the actual condenser outlet temperature.

In this embodiment, the speed of the outdoor fan is mainly related to the current outdoor ambient temperature and the outlet temperature of the condenser. The rotation speed can be increased, decreased or maintained.

Please refer to FIG. 4, in one embodiment, step S30 includes:

Step S31, determining the target condenser temperature range according to the outdoor ambient temperature;

Step S32, adjusting the rotation speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature.

In this embodiment, the target condenser temperature interval T3_target∈[X, X+X1], the target condenser temperature interval represents the interval where the speed of the outdoor fan does not need to be adjusted, and the actual condenser outlet temperature does not need to be adjusted in this interval. The interval of the fan and, when the actual condenser outlet temperature is not within the target condenser temperature interval, the speed of the outdoor fan needs to be adjusted to maintain the actual condenser outlet temperature within the target condenser temperature interval.

The target condenser temperature range T3_target is related to the outdoor ambient temperature, and varies with the change of the outdoor ambient temperature. The target condenser temperature range T3_target is determined by comparing the outdoor ambient temperature with a plurality of preset temperature values according to certain rules.

When the target condenser temperature range and the actual condenser outlet temperature are determined, the speed of the outdoor fan can be adjusted so that the actual condenser outlet temperature is within the target condenser temperature range. Only in this target condenser temperature range can the compressor Decrease the pressure when it actually needs to be decompressed, and boost it when it actually needs to increase the pressure, so as to maintain the stability of the system pressure, and also avoid the system high pressure protection accident that is easy to occur when the refrigerant is deposited, ensuring that the air conditioner is in the cooling state. comfort to the user.

Please refer to Fig. 5, in one embodiment, the step S31, according to the outdoor ambient temperature, determines the target condenser temperature range, including:

Step S310, obtaining the outdoor ambient temperature, and determining a first preset temperature, a second preset temperature, and a third preset temperature corresponding to the outdoor ambient temperature, wherein the third preset temperature is greater than the second preset temperature The temperature is greater than the first preset temperature;

Step S311, calculating the addition of the first preset temperature and the outdoor ambient temperature to obtain a corrected outdoor ambient temperature;

Step S312, determining the maximum temperature between the corrected outdoor ambient temperature and the second preset temperature, and determining the minimum temperature between the maximum temperature and the third preset temperature;

Step S313, using the minimum temperature as the minimum value of the target condenser temperature range, and using the sum of the minimum temperature and the fourth preset temperature as the maximum value of the target condenser temperature range.

In this embodiment, the first preset temperature A, the second preset temperature B, and the third preset temperature C can all be set according to actual needs, which are mainly related to specific refrigerants and specific air-conditioning systems. However, it is necessary to ensure that the third preset temperature C is greater than the second preset temperature B and greater than the first preset temperature A, for example, the first preset temperature A can be 20°C, and the second preset temperature B can be 28°C , the third preset temperature C may be 36°C.

In order to facilitate the understanding of the various processes in this embodiment, mathematical symbols can be used to help understand, and the minimum threshold X in the target condenser temperature range T3_target∈[X, X+X1] is set as: X=min(max(T4 +A, B), C), that is, the first preset temperature A is added to the outdoor ambient temperature T4 to obtain the corrected outdoor ambient temperature T4+A, and then T4+A is calculated with the second preset temperature B Compare to determine the maximum value between the two, compare the determined maximum value with the third preset temperature C to determine the minimum value between the two, and use the minimum value as the minimum threshold value of the target condenser temperature interval T3_target X, and then determine the maximum threshold value of the target condenser temperature range T3_target according to the fourth preset temperature as X+X1, where X1 can be set according to actual needs, such as 3°C, which is not limited here. In order to understand X=min(max(T4+A, B), C) more clearly, X can be expressed as X=min(max(T4+20, 28), 36) in an example, assuming that T4 is 10 °C, then X=30 °C. The purpose of this design is to ensure that the temperature of the refrigerant flowing out of the outdoor condenser reaches the temperature of the refrigerant required to adjust the indoor ambient temperature to cool the room, achieve the cooling effect expected by the user, and improve the comfort of the indoor environment.

The control method of the outdoor fan of the air conditioner in the technical solution of the present invention has the steps of: obtaining the outlet temperature of the condenser and the temperature of the refrigerant heat dissipation pipe; determining the actual condenser outlet temperature according to the outlet temperature of the condenser and the temperature of the heat dissipation pipe of the refrigerant; Adjusting the speed of the outdoor fan according to the outdoor ambient temperature and the actual condenser outlet temperature. The invention solves the technical problem that the cooling effect of the air conditioner is poor due to the deposition of refrigerant in the outdoor unit of the air conditioner. At the core, the present invention mainly obtains the two temperatures of the condenser outlet temperature and the temperature of the refrigerant cooling pipe, and compares the two temperatures to determine whether the condenser refrigerant deposition occurs, thereby determining the actual condenser outlet temperature, that is, the cooling time The actual temperature of the refrigerant when it is output from the condenser outlet, thereby eliminating the influence of refrigerant deposition. Control the speed of the outdoor fan according to the actual condenser outlet temperature, so that the feedback of the control of the outdoor fan will not be caused by the refrigerant deposition, and avoid damage to the air conditioner. The false touch of the system pressure over-pressure protection ensures the cooling effect under the condition of refrigerant deposition and improves the user's comfort experience.

Further, based on the first embodiment of the control method of the outdoor fan of the air conditioner of the present invention, the second embodiment of the control method of the outdoor fan of the air conditioner of the present invention is proposed. In this embodiment, the step S32, according to the target condensation adjusting the speed of the outdoor fan according to the temperature range of the condenser and the actual condenser outlet temperature, including:

Step a, when the actual condenser outlet temperature is within the target condenser temperature range, maintaining the current speed of the outdoor fan;

Step b, returning to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant.

In this embodiment, if the actual condenser outlet temperature T3' is within the target condenser temperature range, that is, when X≤T3'≤X+X1, it means that the temperature of the refrigerant passing through the condenser has reached the cooling requirement, so The speed Pr of the outdoor fan can be kept constant, return to continue to detect the outlet temperature of the condenser and the temperature of the refrigerant heat dissipation pipe according to a certain period of time, and then judge whether there is refrigerant deposition in the outdoor condenser according to the temperature of the condenser outlet and the temperature of the refrigerant heat dissipation pipe. When the refrigerant is deposited, the temperature of the refrigerant cooling pipe is used as the actual condenser outlet temperature, and when no refrigerant deposition occurs, the condenser outlet temperature is used as the actual condenser outlet temperature, and then the next round of outdoor fan speed control is continued.

In one embodiment, the step S32 of adjusting the speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature includes:

Step c, when the actual condenser outlet temperature is lower than the minimum threshold value of the target condenser temperature range, reduce the;

Step d, returning to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant.

When the actual condenser outlet temperature is lower than the minimum threshold of the target condenser temperature range, that is, T3'<X, in order to prevent condensation and other problems, it is necessary to adjust T3' to X≤T3'≤X+ X1 is to increase the actual condenser outlet temperature. When no refrigerant deposition occurs, the condenser outlet temperature is increased. When refrigerant deposition occurs, the refrigerant heat pipe temperature is increased. In order to increase the actual condenser outlet temperature T3', it is necessary to reduce the speed of the outdoor fan, so that the heat exchange between the refrigerant and the outside is not so large, so as to increase the actual condenser outlet temperature. After the actual condenser outlet temperature is adjusted, return to the step of continuing to obtain the condenser outlet temperature and the temperature of the refrigerant cooling pipe, which will not be repeated here.

In one embodiment, the step c, reducing the current speed of the outdoor fan includes:

Decrease the current rotational speed of the outdoor fan in an equal difference stepwise manner until the actual condenser outlet temperature is within the target condenser temperature range or the outdoor fan stops rotating

In order to ensure the stability of the system during the adjustment process of the outdoor fan, the current speed of the outdoor fan can be reduced in an arithmetic step-down manner until the actual condenser outlet temperature is within the target condenser temperature range or The outdoor fan stops rotating. For example, the difference value is P, and the current speed is Pr, then the above process can be expressed as Pr=Pr-P, that is, every time the outdoor fan is adjusted, the P speed will be reduced, and the current speed can be turned off to 0 at the minimum, that is, the outdoor fan stops turn.

In one embodiment, the step S32 of adjusting the speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature includes:

Step e, increasing the current speed of the outdoor fan when the actual condenser outlet temperature is greater than the maximum threshold of the target condenser temperature range;

Step f, returning to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant.

When the actual condenser outlet temperature is greater than the maximum threshold of the target condenser temperature range, that is, T3'>X+X1, in order to prevent the refrigerant temperature from being too high and unable to exchange heat or the amount of heat exchange is greatly reduced, resulting in poor cooling effect , at this time, it is necessary to adjust T3' to X≤T3'≤X+X1, that is, it is necessary to reduce the actual condenser outlet temperature. When no refrigerant deposition occurs, that is to say, reduce the condenser outlet temperature. When refrigerant deposition occurs , that is, to reduce the temperature of the refrigerant heat pipe. In order to increase the actual condenser outlet temperature T3', it is necessary to increase the speed of the outdoor fan, thereby increasing the heat exchange between the refrigerant and the outside to reduce the actual condenser outlet temperature. After the actual condenser outlet temperature is adjusted, return to the step of continuing to obtain the condenser outlet temperature and the temperature of the refrigerant cooling pipe, which will not be repeated here.

In one embodiment, the step e of increasing the current speed of the outdoor fan includes:

Stepwise increase the current speed of the outdoor fan until the actual condenser outlet temperature is within the target condenser temperature range or the outdoor fan reaches a preset maximum speed

In order to ensure the stability of the system during the adjustment process of the outdoor fan, the current speed of the outdoor fan can be increased in an arithmetic stepwise speed increase until the actual condenser outlet temperature is within the target condenser temperature range or The outdoor fan reaches the maximum speed under the current working condition. For example, if the differential value is P and the current speed is Pr, then the above process can be expressed as Pr=Pr+P, that is, the speed of P will be increased every time the outdoor fan is adjusted, and the current speed can reach the maximum allowable speed Pr_max.

In order to further understand the implementation process of the above-mentioned various embodiments, the above-mentioned various embodiments can be combined as a whole of the technical solution of the present invention. In order to understand the present invention more clearly, please refer to Figure 6, which shows the outdoor fan of the air conditioner of the present invention A schematic diagram of an overall comprehensive flow chart of an embodiment of the control method.

1. In the cooling mode, the detection is various parameters of the outdoor unit, including the outdoor unit condenser outlet temperature T3, the refrigerant heat pipe temperature TL, the outdoor ambient temperature T4, the outdoor unit fan speed (current speed) Pr;

2. Compare the difference between T3 and TL-D, determine whether there is refrigerant deposition that causes T3 distortion, and determine the actual T3 assignment used to control the windshield, that is, determine whether the actual T3′ is T3 or TL;

3. T3 target value T3_target is associated with T4, target T3_target∈[X, X+X1], X=min(max(T4+A, B), C);

4. The current rotational speed Pr of the outdoor fan is adaptively adjusted (maintained, increased or decreased) according to the target T3_target.

In addition, the present invention also provides a control device for an outdoor fan of an air conditioner, please refer to Figure 8, the control device for an outdoor fan of an air conditioner includes:

The temperature detection module A10 is used to obtain the outlet temperature of the condenser and the temperature of the refrigerant cooling pipe;

A temperature correction module A20, configured to determine the actual condenser outlet temperature according to the condenser outlet temperature and the refrigerant cooling pipe temperature;

The working condition adjustment module A30 is used for adjusting the speed of the outdoor fan according to the outdoor ambient temperature and the actual condenser outlet temperature.

Optionally, the temperature correction module A20 is also used for:

Obtaining a first difference between the temperature of the cooling pipe of the refrigerant and the outlet temperature of the condenser;

When the first difference is greater than or equal to a first temperature threshold, it is determined that the temperature of the refrigerant cooling pipe is the actual condenser outlet temperature;

When the first difference is smaller than the first temperature threshold, it is determined that the condenser outlet temperature is the actual condenser outlet temperature.

Optionally, the working condition adjustment module A30 is also used for:

Determine the target condenser temperature range according to the outdoor ambient temperature;

Adjusting the rotational speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature.

Optionally, the working condition adjustment module A30 is also used for:

When the actual condenser outlet temperature is within the target condenser temperature range, maintaining the current speed of the outdoor fan;

Go back to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant.

Optionally, the working condition adjustment module A30 is also used for:

When the actual condenser outlet temperature is lower than the minimum threshold of the target condenser temperature range, reduce the current speed of the outdoor fan;

Go back to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant.

Optionally, the working condition adjustment module A30 is also used for:

When the actual condenser outlet temperature is greater than the maximum threshold of the target condenser temperature range, increasing the current speed of the outdoor fan;

Go back to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant.

Optionally, the working condition adjustment module A30 is also used for:

Decreasing the current rotational speed of the outdoor fan in a stepwise manner until the actual condenser outlet temperature is within the target condenser temperature range or the outdoor fan stops rotating;

Optionally, the working condition adjustment module A30 is also used for:

Stepwise increase the current speed of the outdoor fan until the actual condenser outlet temperature is within the target condenser temperature range or the outdoor fan reaches a preset maximum speed.

The specific implementation of the control device for the outdoor fan of the air conditioner of the present invention is basically the same as the above-mentioned embodiments of the control method for the outdoor fan of the air conditioner, and will not be repeated here.

In addition, the present invention also provides a computer-readable storage medium. The control program of the outdoor fan of the air conditioner is stored on the computer-readable storage medium of the present invention, wherein when the control program of the outdoor fan of the air conditioner is executed by the processor, the steps of the above-mentioned control method for the outdoor fan of the air conditioner are realized.

For the method implemented when the control program of the outdoor fan of the air conditioner is executed, reference may be made to various embodiments of the control method of the outdoor fan of the air conditioner in the present invention, which will not be repeated here.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

It should be noted that, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A control method for an air conditioner outdoor fan, characterized in that the control method may further comprise the steps: Obtain the outlet temperature of the condenser and the temperature of the refrigerant cooling pipe; Determine the actual condenser outlet temperature according to the condenser outlet temperature and the refrigerant cooling pipe temperature; Adjusting the speed of the outdoor fan according to the outdoor ambient temperature and the actual condenser outlet temperature. 2. The method for controlling the outdoor fan of an air conditioner according to claim 1, wherein the step of determining the actual condenser outlet temperature according to the outlet temperature of the condenser and the temperature of the refrigerant radiating pipe includes: Obtaining a first difference between the temperature of the cooling pipe of the refrigerant and the outlet temperature of the condenser; When the first difference is greater than or equal to a first temperature threshold, it is determined that the temperature of the refrigerant cooling pipe is the actual condenser outlet temperature; When the first difference is smaller than the first temperature threshold, it is determined that the condenser outlet temperature is the actual condenser outlet temperature. 3. The method for controlling the outdoor fan of an air conditioner according to claim 1, wherein the step of adjusting the speed of the outdoor fan according to the outdoor ambient temperature and the actual condenser outlet temperature comprises: Determine the target condenser temperature range according to the outdoor ambient temperature; Adjusting the rotational speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature. 4. The method for controlling the outdoor fan of an air conditioner according to claim 3, wherein the step of adjusting the speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature comprises : When the actual condenser outlet temperature is within the target condenser temperature range, maintaining the current speed of the outdoor fan; Go back to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant. 5. The method for controlling the outdoor fan of an air conditioner according to claim 3, wherein the step of adjusting the speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature comprises : When the actual condenser outlet temperature is lower than the minimum threshold of the target condenser temperature range, reduce the current speed of the outdoor fan; Go back to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant. 6. The method for controlling the outdoor fan of an air conditioner according to claim 5, wherein the step of adjusting the speed of the outdoor fan according to the target condenser temperature range and the actual condenser outlet temperature comprises : When the actual condenser outlet temperature is greater than the maximum threshold of the target condenser temperature range, increasing the current speed of the outdoor fan; Go back to the step of obtaining the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant. 7. The method for controlling an outdoor fan of an air conditioner according to claim 6, wherein the step of reducing the current speed of the outdoor fan comprises: Decreasing the current rotational speed of the outdoor fan in a stepwise manner until the actual condenser outlet temperature is within the target condenser temperature range or the outdoor fan stops rotating; The step of increasing the current speed of the outdoor fan includes: Stepwise increase the current speed of the outdoor fan until the actual condenser outlet temperature is within the target condenser temperature range or the outdoor fan reaches a preset maximum speed. 8. A control device for an outdoor fan of an air conditioner, characterized in that the control device for an outdoor fan of an air conditioner comprises: The temperature detection module is used to obtain the outlet temperature of the condenser and the temperature of the cooling pipe of the refrigerant; A temperature correction module, configured to determine the actual condenser outlet temperature according to the condenser outlet temperature and the refrigerant cooling pipe temperature; The working condition adjustment module is used to adjust the speed of the outdoor fan according to the outdoor ambient temperature and the actual condenser outlet temperature. 9. An air conditioner, characterized in that the air conditioner includes a processor, a memory, and a control program of an outdoor fan of the air conditioner that is stored on the memory and can be executed by the processor, wherein the air conditioner When the control program of the outdoor fan of the air conditioner is executed by the processor, the steps of the method for controlling the outdoor fan of the air conditioner according to any one of claims 1 to 7 are realized. 10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a control program for an outdoor fan of an air conditioner, wherein when the control program for an outdoor fan of an air conditioner is executed by a processor, the The steps of the control method of the outdoor fan of the air conditioner according to any one of claims 1 to 7.

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