A method, apparatus, air conditioner, and storage medium for controlling an air conditioner.

Abstract

This invention discloses a control method, device, air conditioner, and storage medium for an air conditioner. In this air conditioner, the refrigerant flow path within the outdoor heat exchanger is divided into two flow paths, each equipped with a fan and a diversion valve. The method includes: after the air conditioner is turned on and operating in heating mode, determining whether the indoor ambient temperature is greater than or equal to the set temperature; if the indoor ambient temperature is greater than or equal to the set temperature, controlling the operating states of the first and second fans, as well as the opening and closing states of the first and second diversion valves, based on the indoor and outdoor heat exchanger pipe temperatures. This solution, by dividing the outdoor heat exchanger into two flow paths and controlling the operating states of the fans corresponding to the two flow paths, as well as the opening and closing of the diversion valves on the two flow paths, achieves multi-level regulation of the indoor heat exchanger pipe temperature, solving the problem of frequent air conditioner shutdowns due to excessively high temperatures at the indoor heat exchanger, and improving the user experience.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to an air conditioning control method, device, air conditioner, and storage medium, and more particularly to an air conditioning control method, device, air conditioner, and storage medium in heating mode. Background Technology

[0002] When an air conditioner is in overload heating mode, the high load on the air conditioner causes the indoor heat exchanger to reach a high temperature. The air conditioner may then detect that the indoor temperature has reached the set temperature and shut down, or the indoor heat exchanger may trigger a high-temperature protection shutdown. However, frequent shutdowns can affect the comfort of use.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a control method, device, air conditioner, and storage medium for an air conditioner, to solve the problem in related solutions where the air conditioner stops when it detects that the indoor temperature has reached the set temperature under overload heating conditions, or the indoor heat exchanger stops due to high temperature. Frequent shutdowns affect user comfort. This invention achieves multi-level regulation of the indoor heat exchanger pipe temperature by dividing the outdoor heat exchanger into two flow paths, controlling the fan operation status of the two flow paths according to the indoor and outdoor heat exchanger pipe temperatures, and controlling the opening and closing of the diversion valves on the two flow paths. This solves the problem of frequent shutdowns of the air conditioner due to excessively high temperatures at the indoor heat exchanger, and improves the user experience.

[0005] This invention provides a control method for an air conditioner, the air conditioner including an indoor heat exchanger and an outdoor heat exchanger; the refrigerant flow path in the outdoor heat exchanger is divided into a first flow path and a second flow path, the first flow path and the second flow path being arranged in parallel; the outdoor heat exchanger has a first fan, a second fan, a first diverter valve and a second diverter valve; the first diverter valve is located at the refrigerant inlet of the first flow path, and the second diverter valve is located at the refrigerant inlet of the second flow path; the first fan dissipates heat for the first flow path, and the second fan dissipates heat for the second flow path; the method... The process includes: after the air conditioner is turned on and running in heating mode, acquiring the indoor ambient temperature, the indoor heat exchanger tube temperature, and the outdoor heat exchanger tube temperature; wherein, the outdoor heat exchanger tube temperature includes the coil tube temperature at the first flow path and the coil tube temperature at the second flow path; determining whether the indoor ambient temperature is greater than or equal to the set temperature; if the indoor ambient temperature is greater than or equal to the set temperature, controlling the operating status of the first fan and the second fan, as well as the opening and closing status of the first diversion valve and the second diversion valve, based on the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature.

[0006] In some implementations, controlling the operating status of the first fan and the second fan based on the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature includes: determining whether the indoor heat exchanger tube temperature is greater than a first threshold; if the indoor heat exchanger tube temperature is greater than the first threshold, determining whether the speeds of the first fan and the second fan are both at their minimum speeds; if the speeds of the first fan and the second fan are not at their minimum speeds, reducing the speeds of the first fan and the second fan by one level, and after a first set time, determining whether to further reduce the speeds of the first fan and the second fan based on the indoor heat exchanger tube temperature; if the speeds of the first fan and the second fan are at their minimum speeds, determining whether to shut down either the first fan or the second fan based on the indoor heat exchanger tube temperature after a second set time.

[0007] In some implementations, determining whether to shut down either the first fan or the second fan based on the indoor heat exchanger tube temperature includes: determining whether the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and whether the indoor heat exchanger tube temperature at the current moment is greater than a second threshold; if the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and the indoor heat exchanger tube temperature at the current moment is greater than the second threshold, then either the first fan or the second fan is shut down, and then, after a second set time interval, determining whether to shut down the other of the first fan or the second fan based on the indoor heat exchanger tube temperature.

[0008] In some implementations, controlling the opening and closing states of the first and second diversion valves based on the indoor heat exchanger tube temperature includes: after both the first and second fans are turned off, determining whether the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and whether the indoor heat exchanger tube temperature at the current moment is greater than a second threshold; if the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and the indoor heat exchanger tube temperature at the current moment is greater than the second threshold, then closing either the first or second diversion valve.

[0009] In some embodiments, controlling the opening and closing states of the first and second diversion valves based on the outdoor heat exchanger tube temperature includes: determining whether the coil temperature of the flow path in the first and second flow paths where the diversion valve is not closed is less than a third threshold; if the coil temperature of the flow path in the first and second flow paths where the diversion valve is not closed is less than the third threshold, then closing the unclosed diversion valve and simultaneously opening the other diversion valve; then controlling the opening and closing states of the first and second diversion valves again based on the outdoor heat exchanger tube temperature.

[0010] In some embodiments, the method further includes: if the air conditioner stops due to excessively high indoor heat exchanger tube temperature, then when the air conditioner is turned on, acquiring the interval time from when the air conditioner stops to when it starts; and controlling the speed of the first fan and the second fan when the air conditioner is turned on according to the interval time.

[0011] In some embodiments, controlling the speed of the first and second fans when the air conditioner is turned on according to the interval time includes: if the interval time is less than or equal to a third set time, controlling the speed of the first and second fans to a set speed; if the interval time is greater than a fourth set time, controlling the speed of the first and second fans to a low fan speed; if the interval time is greater than the third set time and less than or equal to the fourth set time, controlling the speed of the first and second fans to a speed one level lower than the set speed.

[0012] In conjunction with the above method, another aspect of the present invention provides a control device for an air conditioner, the air conditioner including an indoor heat exchanger and an outdoor heat exchanger; the refrigerant flow path in the outdoor heat exchanger is divided into a first flow path and a second flow path, the first flow path and the second flow path being arranged in parallel; the outdoor heat exchanger has a first fan, a second fan, a first diversion valve and a second diversion valve; the first diversion valve is disposed at the refrigerant inlet of the first flow path, and the second diversion valve is disposed at the refrigerant inlet of the second flow path; the first fan dissipates heat for the first flow path, and the second fan dissipates heat for the second flow path; the device includes: an acquisition unit, The control unit is configured to acquire the indoor ambient temperature, the indoor heat exchanger tube temperature, and the outdoor heat exchanger tube temperature after the air conditioner is turned on and running in heating mode; wherein the outdoor heat exchanger tube temperature includes the coil tube temperature at the first flow path and the coil tube temperature at the second flow path; the control unit is configured to determine whether the indoor ambient temperature is greater than or equal to a set temperature; the control unit is further configured to control the operating status of the first fan and the second fan, as well as the opening and closing status of the first diversion valve and the second diversion valve, based on the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature if the indoor ambient temperature is greater than or equal to the set temperature.

[0013] In some embodiments, the control unit controls the operating status of the first fan and the second fan based on the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature, including: determining whether the indoor heat exchanger tube temperature is greater than a first threshold; if the indoor heat exchanger tube temperature is greater than the first threshold, determining whether the speeds of the first fan and the second fan are both at their minimum speeds; if the speeds of the first fan and the second fan are not at their minimum speeds, reducing the speeds of the first fan and the second fan by one level, and after a first set time, continuing to determine whether to further reduce the speeds of the first fan and the second fan based on the indoor heat exchanger tube temperature; if the speeds of the first fan and the second fan are at their minimum speeds, determining whether to shut down either the first fan or the second fan based on the indoor heat exchanger tube temperature after a second set time.

[0014] In some implementations, the control unit determines whether to shut down either the first fan or the second fan based on the indoor heat exchanger tube temperature, including: determining whether the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and whether the indoor heat exchanger tube temperature at the current moment is greater than a second threshold; if the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and the indoor heat exchanger tube temperature at the current moment is greater than the second threshold, then shutting down either the first fan or the second fan, and then determining whether to shut down the other one of the first fan or the second fan based on the indoor heat exchanger tube temperature at second set time intervals.

[0015] In some embodiments, the control unit controls the opening and closing states of the first and second diversion valves based on the indoor heat exchanger tube temperature, including: after both the first and second fans are turned off, determining whether the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and whether the indoor heat exchanger tube temperature at the current moment is greater than a second threshold; if the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and the indoor heat exchanger tube temperature at the current moment is greater than the second threshold, then closing either the first or second diversion valve.

[0016] In some embodiments, the control unit controls the opening and closing states of the first and second diversion valves based on the outdoor heat exchanger tube temperature, including: determining whether the coil temperature of the flow path in the first and second flow paths where the diversion valve is not closed is less than a third threshold; if the coil temperature of the flow path in the first and second flow paths where the diversion valve is not closed is less than the third threshold, then closing the unclosed diversion valve and simultaneously opening the other diversion valve; then controlling the opening and closing states of the first and second diversion valves again based on the outdoor heat exchanger tube temperature.

[0017] In some embodiments, the device further includes: the acquisition unit, specifically configured to acquire the interval time from the air conditioner stopping to starting when the air conditioner is turned on if the air conditioner stops due to excessively high indoor heat exchanger pipe temperature; and the control unit, specifically configured to control the speed of the first fan and the second fan when the air conditioner is turned on according to the interval time.

[0018] In some embodiments, the control unit controls the speed of the first and second fans when the air conditioner is turned on according to the interval time, including: if the interval time is less than or equal to a third set time, controlling the speed of the first and second fans to a set speed; if the interval time is greater than a fourth set time, controlling the speed of the first and second fans to a low fan speed; if the interval time is greater than the third set time and less than or equal to the fourth set time, controlling the speed of the first and second fans to a speed one level lower than the set speed.

[0019] In conjunction with the above-described device, the present invention further provides an air conditioner, comprising: the control device for the air conditioner described above.

[0020] In conjunction with the above method, the present invention further provides a storage medium comprising a stored program, wherein, when the program is executed, the device on which the storage medium is located controls the air conditioner control method described above to be performed.

[0021] The present invention divides the refrigerant flow path within the outdoor heat exchanger into a first flow path and a second flow path, which are connected in parallel. Both the first and second flow paths are equipped with fans and diverter valves. After the air conditioner is turned on and operates in heating mode, it acquires the indoor ambient temperature, the indoor heat exchanger tube temperature, and the outdoor heat exchanger tube temperature. It then determines whether the indoor ambient temperature is greater than or equal to the set temperature. If the indoor ambient temperature is greater than or equal to the set temperature, it controls the operating status of the first and second fans, as well as the opening and closing status of the first and second diverter valves, based on the indoor and outdoor heat exchanger tube temperatures. By controlling the operating status of the outdoor fans and the opening and closing status of the diverter valves, multi-level adjustment of the indoor heat exchanger tube temperature is achieved. This solves the problem of frequent air conditioner shutdowns due to excessively high temperatures at the indoor heat exchanger, while achieving precise temperature control and avoiding large temperature ranges when adjusting the indoor heat exchanger temperature, thus improving the user experience.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0023] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a flowchart illustrating an embodiment of the air conditioner control method of the present invention;

[0025] Figure 2 This is a flowchart illustrating an embodiment of the method for controlling the operating status of the outdoor unit fan in the present invention.

[0026] Figure 3 This is a schematic flowchart of an embodiment of the method of the present invention for controlling the shutdown of the outdoor unit fan;

[0027] Figure 4 This is a flowchart illustrating an embodiment of the method of the present invention for controlling the opening and closing state of the outdoor unit diversion valve;

[0028] Figure 5 This is a schematic diagram of the structure of an embodiment of the air conditioner control device of the present invention;

[0029] Figure 6 This is a schematic diagram of the air conditioning system structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the outdoor heat exchanger of the air conditioner of the present invention;

[0031] Figure 8 A flowchart illustrating an embodiment of the control method for an air conditioner in heating mode according to the present invention.

[0032] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0033] 102 - Acquisition unit; 104 - Control unit. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0035] When an air conditioner is running in heating mode, as the room temperature rises, the outlet air temperature also increases. Because hot air has a lower density and greater buoyancy, although it is initially blown downwards from the outlet, its speed decreases as it draws in surrounding air, and buoyancy becomes dominant. This causes the hot air to rise, reducing the airflow speed from the indoor unit. Consequently, heat accumulates around the indoor unit, causing a short circuit in the return airflow and increasing the load on the air conditioner. The air conditioner will then shut down when the indoor temperature reaches the set temperature, or it may shut down due to high-temperature protection caused by heat accumulation around the indoor unit. Since only the area near the indoor unit reaches the set temperature, while other areas of the room remain cool, frequent shutdowns of the air conditioner affect its heating efficiency and reduce the user experience.

[0036] Therefore, the present invention provides an air conditioner control method that divides the refrigerant flow path inside the outdoor heat exchanger into two flow paths, controls the fan operation status of the two flow paths according to the pipe temperature of the indoor and outdoor heat exchangers, and controls the diversion valves on the flow paths to achieve multi-level regulation of the indoor heat exchanger pipe temperature, thus solving the problem of frequent air conditioner shutdowns.

[0037] According to an embodiment of the present invention, a control method for an air conditioner is provided. The air conditioner includes an indoor heat exchanger and an outdoor heat exchanger. The refrigerant flow path in the outdoor heat exchanger is divided into a first flow path and a second flow path, which are arranged in parallel. The outdoor heat exchanger has a first fan, a second fan, a first diversion valve, and a second diversion valve. The first diversion valve is disposed at the refrigerant inlet of the first flow path, and the second diversion valve is disposed at the refrigerant inlet of the second flow path. The first fan dissipates heat for the first flow path, and the second fan dissipates heat for the second flow path. Figure 6 This is a schematic diagram of the system structure of the air conditioner of the present invention. The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, an expansion valve, and a throttling device. A temperature sensor for detecting the temperature of the indoor heat exchanger pipes is installed inside the indoor heat exchanger. The outdoor heat exchanger has two fans for dissipating heat to different areas of the outdoor heat exchanger. The temperature of the indoor heat exchanger pipes differs from the temperature at the indoor heat exchanger itself. The temperature at the indoor heat exchanger refers to the temperature in the indoor environment near the indoor heat exchanger, which can be detected by the temperature sensor that detects the indoor ambient temperature.

[0038] The specific structure of the outdoor heat exchanger is as follows: Figure 7 As shown, Figure 7This is a schematic diagram of the outdoor heat exchanger of the air conditioner of the present invention. The refrigerant flow path inside the outdoor heat exchanger is divided into two flow paths, which are arranged in parallel and have the same heat dissipation area, that is, the heat dissipation capacity of the refrigerant is consistent. A diversion valve 1 and a diversion valve 2 are installed at the refrigerant inlet of each of the two flow paths to control whether the refrigerant flows into the corresponding flow path, that is, to control the opening and closing of the corresponding flow path. Temperature sensors are installed on the heat exchange coils of both flow paths to detect the pipe temperature at that point.

[0039] like Figure 1 The diagram shows a flowchart of an embodiment of the method of the present invention. The air conditioner control method may include steps S110 to S130.

[0040] In step S110, after the air conditioner is turned on and runs in heating mode, the indoor ambient temperature, indoor heat exchanger tube temperature, and outdoor heat exchanger tube temperature are acquired; wherein, the outdoor heat exchanger tube temperature includes the coil tube temperature at the first flow path and the coil tube temperature at the second flow path.

[0041] In step S120, it is determined whether the indoor ambient temperature is greater than or equal to the set temperature.

[0042] In step S130, if the indoor ambient temperature is greater than or equal to the set temperature, the operating status of the first fan and the second fan, as well as the opening and closing status of the first diversion valve and the second diversion valve, are controlled according to the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature.

[0043] Once the indoor ambient temperature reaches the set temperature, the indoor heat demand is saturated. If the air conditioner continues to control the heat output based on the previous settings, it can easily lead to excessive indoor load and cause the air conditioner to shut down. Therefore, this invention, based on a specific outdoor heat exchanger structure and by controlling the outdoor fan and the diversion valve within the outdoor heat exchanger according to the pipe temperatures of the indoor and outdoor heat exchangers, adjusts the heat exchange efficiency of the outdoor heat exchanger for the refrigerant. This lowers the temperature of the refrigerant discharged from the compressor, reduces the heat released by the indoor heat exchanger, and lowers the temperature at the indoor heat exchanger. This prevents excessively high indoor temperatures from causing overload and resulting in shutdown due to reaching the temperature limit or overheating.

[0044] In some implementations, step S130, which involves controlling the operating states of the first and second fans based on the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature, includes specific processes such as... Figure 2 The flowchart shown is a schematic diagram of an embodiment of the method of the present invention for controlling the operating state of the outdoor unit fan, including steps S210 to S240.

[0045] Step S210: Determine whether the indoor heat exchanger tube temperature is greater than a first threshold. The first threshold can be set to 54°C. By judging the relationship between the indoor heat exchanger tube temperature and the first threshold, it is determined whether there is a possibility of shutdown due to excessively high temperature at the indoor heat exchanger.

[0046] Step S220: If the temperature of the indoor heat exchanger tube is greater than the first threshold, it indicates that the system is likely to shut down due to the indoor temperature reaching the temperature point or to prevent high temperature shutdown. Then, it is determined whether the speed of the first fan and the second fan are both at the minimum speed, and it is determined whether to take corresponding measures to reduce the fan speed or shut down the fan.

[0047] Step S230: If the speed of the first fan and the second fan is not the minimum speed, then reduce the speed of the first fan and the second fan by one level, and after a first set time, continue to determine whether to further reduce the speed of the first fan and the second fan based on the indoor heat exchanger tube temperature.

[0048] Since the speed control strategies for the first and second fans are the same, their speeds are consistent. For example, if the first fan is running at a high speed, the second fan will also be running at a high speed. Therefore, judging the speed of one fan is equivalent to judging the other fan as well. Thus, when determining whether the speed is at the minimum speed, only the speed of one fan needs to be checked. If the speeds of the first and second fans are not at the minimum speed, it means that the heat released by the indoor heat exchanger can still be reduced by lowering the fan speeds. After simultaneously reducing the speeds of the first and second fans for a first set time, the effect of this speed reduction is judged based on whether the indoor heat exchanger tube temperature is greater than a first threshold. This first set time can be 5 minutes. If it still cannot prevent the air conditioner from frequently stopping, the speeds of the first and second fans are reduced again, and this cycle continues until the indoor heat exchanger tube temperature decreases and falls below the first threshold. Once the indoor heat exchanger tube temperature decreases and falls below the first threshold, the current speed is maintained.

[0049] Step S240: If the speed of the first fan and the second fan is the lowest speed, then after a second set time, determine whether to shut down either the first fan or the second fan based on the indoor heat exchanger tube temperature.

[0050] If the fan speed is already at its lowest after being reduced, it means that reducing the speed is not effective in lowering the indoor heat exchanger tube temperature. Therefore, in order to avoid the air conditioner from shutting down, it is necessary to adopt a control strategy of shutting down the fan, which will further reduce the heat exchange efficiency of the outdoor heat exchanger for the refrigerant.

[0051] In some implementations, step S240, which involves determining whether to shut down either the first fan or the second fan based on the indoor heat exchanger tube temperature, is as follows: Figure 3 The flowchart of an embodiment of the method of the present invention shown includes controlling the outdoor unit fan to shut down, comprising steps S310 and S320.

[0052] Step S310: Determine whether the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and whether the indoor heat exchanger tube temperature at the current moment is greater than the second threshold; the second set time can be 40s, and the second threshold can be 58℃.

[0053] Step S320: If the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and the indoor heat exchanger tube temperature at the current moment is greater than the second threshold, then either the first fan or the second fan is turned off. After that, at the second set time interval, it is determined whether to turn off the other of the first fan and the second fan based on the indoor heat exchanger tube temperature.

[0054] If the current indoor heat exchanger tube temperature is higher than the temperature 40 seconds ago and exceeds 58°C, it indicates that the indoor heat exchanger tube temperature is still rising. In this case, it is necessary to shut down the fan. The first and second fans only operate in different locations; their structure and effect are the same. There is no specific order in which a fan needs to be shut down.

[0055] After one fan is turned off, after a 40-second interval, the indoor heat exchanger tube temperature is compared with that of 40 seconds ago to determine whether the indoor heat exchanger tube temperature has risen. If the indoor heat exchanger tube temperature is still rising, the other fan is turned off; if the indoor heat exchanger tube temperature no longer rises, the current state is maintained.

[0056] Figure 8 A flowchart illustrating an embodiment of the air conditioner control method in heating mode according to the present invention is shown below. Figure 8 As shown, the method of the present invention includes:

[0057] Step 1: When the air conditioner is turned on and running in heating mode, detect the indoor ambient temperature T. 内环 And determine whether T 内环 -T 设定 If the inner ring of T is set to ≥0℃, then proceed to step 2.

[0058] Step 2: Check the pipe temperature T_inner pipe at the indoor evaporator every 40 seconds and determine if T_inner pipe is within range. 内管 >T1, if T 内管 If T ≤ T1, then maintain the current state and continue running; if T < T1, then continue running. 内管 If the value is greater than T1, then the speed of the two outdoor fans will be reduced by one level. If the speed is already at the lowest level before the speed is reduced, then step 3 will be executed.

[0059] Step 3, determine the current temperature T of the inner tube. 内管 Compared with the inner tube temperature T 40s ago 内管40s前 The size relationship, and whether it is T 内管 >T2. If T 内管 -T 内管40s前 If T ≤ 0℃, then maintain the current state and continue operating; if T 内管 -T 内管40s前 >0℃, and T 内管 If the result is >T2, then one of the outdoor fans will be shut down, and step 3 will be executed again to determine whether the other outdoor fan should be stopped; if both outdoor fans have stopped running, then step 4 will be executed.

[0060] In some embodiments, the specific process of controlling the opening and closing states of the first and second diversion valves based on the indoor heat exchanger tube temperature in step S130 is as follows: Figure 4 The flowchart of an embodiment of the method of the present invention for controlling the opening and closing state of the outdoor unit diversion valve is shown, including steps S410 to S420.

[0061] Step S410: After both the first fan and the second fan are turned off, determine whether the indoor heat exchanger tube temperature at the current time is greater than the indoor heat exchanger tube temperature before the second set time, and whether the indoor heat exchanger tube temperature at the current time is greater than the second threshold.

[0062] Step S420: If the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and the indoor heat exchanger tube temperature at the current moment is greater than the second threshold, then close either the first diversion valve or the second diversion valve.

[0063] If shutting down all fans still fails to suppress the rise in indoor heat exchanger pipe temperature, then control the opening and closing of the diversion valve to control the refrigerant to flow only through a portion of the outdoor heat exchanger coils, reducing the heat exchange area and thus reducing the heat exchange capacity. This further reduces the heat exchange efficiency of the outdoor heat exchanger for the refrigerant and lowers the temperature of the refrigerant discharged from the compressor, thereby reducing the heat released by the indoor heat exchanger.

[0064] If the current indoor heat exchanger tube temperature is higher than the indoor heat exchanger tube temperature 40 seconds ago, and also higher than 58℃, it indicates that the indoor heat exchanger tube temperature is still rising. At this point, it is necessary to close the diversion valve and reduce the heat exchange area of ​​the outdoor heat exchanger. Since the heat exchange coils corresponding to the first and second diversion valves have the same area, there is no restriction on the order in which the diversion valves are closed.

[0065] When a diversion valve is closed, the outdoor heat exchanger will be in a state where both fans have stopped rotating and the refrigerant is only flowing through a portion of the heat exchange coils. If the indoor heat exchanger's tube temperature is still high in this state, and the indoor heat exchanger's tube temperature exceeds the fourth threshold (which can be 64℃), then the system will be shut down.

[0066] The solution of this invention achieves accurate temperature control by reducing the fan speed of the outdoor heat exchanger, controlling multiple outdoor fans to shut down one by one, and reducing the heat exchange area of ​​the outdoor heat exchanger for refrigerant heat exchange. This reduces the temperature of the indoor heat exchanger, avoids frequent shutdowns of the air conditioner, and prevents the heat released by the indoor heat exchanger from being reduced too much, thus reducing the user experience and ensuring comfort during air conditioner use.

[0067] In some embodiments, the specific process of controlling the opening and closing states of the first and second diversion valves according to the outdoor heat exchanger tube temperature in step S130 includes: determining whether the coil temperature of the flow path in the first and second flow paths where the diversion valve is not closed is less than a third threshold, which can be 2°C; if the coil temperature of the flow path in the first and second flow paths where the diversion valve is not closed is less than the third threshold, then the unclosed diversion valve is closed, and the other diversion valve is opened; then the opening and closing states of the first and second diversion valves are controlled again according to the outdoor heat exchanger tube temperature.

[0068] Because one refrigerant flow path is closed, the refrigerant only exchanges heat in a portion of the coils within the outdoor heat exchanger. This causes the temperature of that portion of the coil to drop more rapidly. Therefore, to prevent the temperature of this coil from becoming too low and causing frost, when the temperature of this coil is below 2°C, the corresponding diverter valve is closed, and the diverter valve of the other flow path is opened, allowing the refrigerant to exchange heat in the other flow path. This alternating operation prevents excessive indoor heating while avoiding insufficient compressor overheating due to coil frost, which could affect the compressor's reliability.

[0069] like Figure 8 As shown, the method of the present invention further includes:

[0070] Step 4, using the current inner tube temperature T 内管 Compared with the inner tube temperature T 40s ago 内管40s前 The magnitude of the temperature difference determines whether the inner tube temperature is still rising. If T... 内管 -T 内管40s前 If the temperature is >0℃, then close the diversion valve 1, which controls the upper part of the outdoor heat exchanger, to further reduce the heat exchange area of ​​the outdoor heat exchanger and reduce the heat exchange capacity of the outdoor heat exchanger. Then proceed to step 5.

[0071] Step 5: Detect the pipe temperature T of the lower part of the outdoor heat exchanger. 外管2 And determine whether T外管2 <T3, if T 外管2 If the temperature is less than T3, then open the upper diversion valve 1 and close the diversion valve 2, switching the outdoor heat exchanger to the upper section for heat exchange. At this time, measure the pipe temperature T of the upper section of the outdoor heat exchanger. 外管1 And determine whether T 外管1 <T3, if T 外管1 If the value is less than T3, then the lower diversion valve 2 is opened and the diversion valve 1 is closed, switching the outdoor heat exchanger to the lower part for heat exchange. This allows the upper and lower parts of the outdoor heat exchanger to work alternately, preventing the outdoor heat exchanger from becoming too cold and frosting, which could lead to insufficient superheat at the bottom of the compressor and affect the compressor's operational reliability over long-term operation.

[0072] In some embodiments, the method of the present invention further includes: if the air conditioner stops due to excessively high indoor heat exchanger tube temperature, then when the air conditioner is turned on, obtaining the interval time from when the air conditioner stops to when it starts; and controlling the speed of the first fan and the second fan when the air conditioner is turned on according to the interval time.

[0073] The specific process of controlling the speed of the first and second fans when the air conditioner is turned on according to the interval time includes: if the interval time is less than or equal to a third set time, then the speed of the first and second fans is controlled at the set speed; if the interval time is greater than a fourth set time, then the speed of the first and second fans is controlled at a low fan speed; if the interval time is greater than the third set time and less than or equal to the fourth set time, then the speed of the first and second fans is controlled at a speed one level lower than the set speed. The third set time can be 3 minutes, and the fourth set time can be 6 minutes.

[0074] To prevent the air conditioner from shutting down again due to excessively high indoor heat exchanger pipe temperature when restarting after being turned off, the outdoor fan speed is controlled immediately upon startup. If the interval between shutdown and startup is less than 3 minutes, it indicates poor room insulation, a rapid temperature drop, a high cooling load, and a large heat demand; in this case, the air conditioner should operate at the preset speed. If the interval is greater than 3 minutes but less than 6 minutes, it indicates a moderate cooling load and a moderate heat demand; in this case, the outdoor fan speed should be reduced by one level to prevent high-temperature shutdown. If the interval is greater than 6 minutes, it indicates a low cooling load and a small heat demand; in this case, the outdoor fan should operate at a low speed to ensure the room's heat requirements are met while preventing high-temperature shutdown.

[0075] The technical solution of this embodiment divides the refrigerant flow path in the outdoor heat exchanger into a first flow path and a second flow path, which are connected in parallel. Both the first and second flow paths are equipped with fans and diverter valves. After the air conditioner is turned on and operates in heating mode, it acquires the indoor ambient temperature, the indoor heat exchanger tube temperature, and the outdoor heat exchanger tube temperature. It then determines whether the indoor ambient temperature is greater than or equal to the set temperature. If the indoor ambient temperature is greater than or equal to the set temperature, it controls the operating status of the first and second fans, as well as the opening and closing status of the first and second diverter valves, based on the indoor and outdoor heat exchanger tube temperatures. By controlling the operating status of the outdoor fans and the opening and closing status of the diverter valves, multi-level adjustment of the indoor heat exchanger tube temperature is achieved. This solves the problem of frequent shutdowns of the air conditioner due to excessively high temperatures at the indoor heat exchanger, while achieving precise temperature control and avoiding large temperature ranges when adjusting the indoor heat exchanger temperature, thus improving the user experience.

[0076] According to an embodiment of the present invention, a control device for an air conditioner corresponding to the control method of the air conditioner is also provided. The air conditioner includes an indoor heat exchanger and an outdoor heat exchanger; the refrigerant flow path in the outdoor heat exchanger is divided into a first flow path and a second flow path, the first flow path and the second flow path being arranged in parallel; the outdoor heat exchanger has a first fan, a second fan, a first diversion valve and a second diversion valve; the first diversion valve is disposed at the refrigerant inlet of the first flow path, and the second diversion valve is disposed at the refrigerant inlet of the second flow path; the first fan dissipates heat for the first flow path, and the second fan dissipates heat for the second flow path. Figure 6 This is a schematic diagram of the system structure of the air conditioner of the present invention. The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, an expansion valve, and a throttling device. A temperature sensor for detecting the temperature of the indoor heat exchanger pipes is installed inside the indoor heat exchanger. The outdoor heat exchanger has two fans for dissipating heat to different areas of the outdoor heat exchanger.

[0077] The specific structure of the outdoor heat exchanger is as follows: Figure 7 As shown, Figure 7 This is a schematic diagram of the outdoor heat exchanger of the air conditioner of the present invention. The refrigerant flow path inside the outdoor heat exchanger is divided into two flow paths, which are arranged in parallel and have the same heat dissipation area, that is, the heat dissipation capacity of the refrigerant is consistent. A diversion valve 1 and a diversion valve 2 are installed at the refrigerant inlet of each of the two flow paths to control whether the refrigerant flows into the corresponding flow path, that is, to control the opening and closing of the corresponding flow path. Temperature sensors are installed on the heat exchange coils of both flow paths to detect the pipe temperature at that point.

[0078] See Figure 5 The diagram shows a structural schematic of an embodiment of the device of the present invention. The control device for the air conditioner may include: an acquisition unit 102 and a control unit 104.

[0079] The acquisition unit 102 is configured to acquire the indoor ambient temperature, the indoor heat exchanger tube temperature, and the outdoor heat exchanger tube temperature after the air conditioner is turned on and running in heating mode; wherein, the outdoor heat exchanger tube temperature includes the coil tube temperature at the first flow path and the coil tube temperature at the second flow path. For the specific functions and processing of this acquisition unit 102, please refer to step S110.

[0080] Control unit 104 is configured to determine whether the indoor ambient temperature is greater than or equal to a set temperature. The specific functions and processing of control unit 104 are described in step S120.

[0081] The control unit 104 is further configured to, if the indoor ambient temperature is greater than or equal to a set temperature, control the operating status of the first and second fans, as well as the opening and closing status of the first and second diversion valves, based on the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature. For the specific functions and processing of this control unit 104, please refer to step S130.

[0082] Once the indoor ambient temperature reaches the set temperature, the indoor heat demand is saturated. If the air conditioner continues to control the heat output based on the previous settings, it can easily lead to excessive indoor load and cause the air conditioner to shut down. Therefore, this invention, based on a specific outdoor heat exchanger structure and by controlling the outdoor fan and the diversion valve within the outdoor heat exchanger according to the pipe temperatures of the indoor and outdoor heat exchangers, adjusts the heat exchange efficiency of the outdoor heat exchanger for the refrigerant. This lowers the temperature of the refrigerant discharged from the compressor, reduces the heat released by the indoor heat exchanger, and lowers the temperature at the indoor heat exchanger. This prevents excessively high indoor temperatures from causing overload and resulting in shutdown due to reaching the temperature limit or overheating.

[0083] In some embodiments, the control unit 104 controls the operating status of the first fan and the second fan based on the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature, including:

[0084] The control unit 104 is further configured to determine whether the indoor heat exchanger tube temperature exceeds a first threshold. The first threshold can be set to 54°C. By determining the relationship between the indoor heat exchanger tube temperature and the first threshold, it is determined whether there is a possibility of shutdown due to excessively high temperature at the indoor heat exchanger. The specific functions and processing of this control unit 104 are described in step S210.

[0085] The control unit 104 is further configured to, if the indoor heat exchanger tube temperature is greater than a first threshold, indicating a high risk of shutdown due to indoor temperature reaching a certain temperature point or high-temperature prevention shutdown, determine whether the speeds of the first and second fans are both at their minimum speeds, and decide whether to take corresponding measures such as reducing the fan speed or shutting down the fans. The specific functions and processing of this control unit 104 are described in step S220.

[0086] The control unit 104 is further configured to, if the speeds of both the first and second fans are not at their minimum speeds, reduce the speeds of the first and second fans by one level, and after a first set time, continue to determine whether to further reduce the speeds of the first and second fans based on the indoor heat exchanger tube temperature. The specific functions and processing of this control unit 104 are described in step S230.

[0087] Since the speed control strategies for the first and second fans are the same, their speeds are consistent. For example, if the first fan is running at a high speed, the second fan will also be running at a high speed. Therefore, judging the speed of one fan is equivalent to judging the other fan as well. Thus, when determining whether the speed is at the minimum speed, only the speed of one fan needs to be checked. If the speeds of the first and second fans are not at the minimum speed, it means that the heat released by the indoor heat exchanger can still be reduced by lowering the fan speeds. After simultaneously reducing the speeds of the first and second fans for a first set time, the effect of this speed reduction is judged based on whether the indoor heat exchanger tube temperature is greater than a first threshold. This first set time can be 5 minutes. If it still cannot prevent the air conditioner from frequently stopping, the speeds of the first and second fans are reduced again, and this cycle continues until the indoor heat exchanger tube temperature decreases and falls below the first threshold. Once the indoor heat exchanger tube temperature decreases and falls below the first threshold, the current speed is maintained.

[0088] The control unit 104 is further configured to determine, after a second set time, whether to shut down either the first or second fan based on the indoor heat exchanger tube temperature if the speeds of the first and second fans are at their minimum. The specific functions and processing of this control unit 104 are described in step S240.

[0089] If the fan speed is already at its lowest after being reduced, it means that reducing the speed is not effective in lowering the indoor heat exchanger tube temperature. Therefore, in order to avoid the air conditioner from shutting down, it is necessary to adopt a control strategy of shutting down the fan, which will further reduce the heat exchange efficiency of the outdoor heat exchanger for the refrigerant.

[0090] In some embodiments, the control unit 104 determines whether to shut down either the first fan or the second fan based on the indoor heat exchanger tube temperature, including:

[0091] The control unit 104 is further configured to determine whether the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before a second set time, and whether the indoor heat exchanger tube temperature at the current moment is greater than a second threshold. The second set time can be 40 seconds, and the second threshold can be 58°C. For the specific functions and processing of the control unit 104, please refer to step S310.

[0092] The control unit 104 is further configured to, if the current indoor heat exchanger tube temperature is greater than the indoor heat exchanger tube temperature before a second set time, and the current indoor heat exchanger tube temperature is greater than a second threshold, then shut down either the first fan or the second fan, and then, after a second set time interval, determine whether to shut down the other of the first fan and the second fan based on the indoor heat exchanger tube temperature. The specific functions and processing of this control unit 104 are described in step S320.

[0093] If the current indoor heat exchanger tube temperature is higher than the temperature 40 seconds ago and exceeds 58°C, it indicates that the indoor heat exchanger tube temperature is still rising. In this case, it is necessary to shut down the fan. The first and second fans only operate in different locations; their structure and effect are the same. There is no specific order in which a fan needs to be shut down.

[0094] After one fan is turned off, after a 40-second interval, the indoor heat exchanger tube temperature is compared with that of 40 seconds ago to determine whether the indoor heat exchanger tube temperature has risen. If the indoor heat exchanger tube temperature is still rising, the other fan is turned off; if the indoor heat exchanger tube temperature no longer rises, the current state is maintained.

[0095] Figure 8 A flowchart illustrating an embodiment of the air conditioner control method in heating mode according to the present invention is shown below. Figure 8 As shown, the method of the present invention includes:

[0096] Step 1: When the air conditioner is turned on and running in heating mode, detect the indoor ambient temperature T. 内环 And determine whether T 内环 -T 设定 If the inner ring of T is set to ≥0℃, then proceed to step 2.

[0097] Step 2: Check the pipe temperature T_inner pipe at the indoor evaporator every 40 seconds and determine if T_inner pipe is within range. 内管 >T1, if T 内管 If T ≤ T1, then maintain the current state and continue running; if T < T1, then continue running. 内管 If the value is greater than T1, then the speed of the two outdoor fans will be reduced by one level. If the speed is already at the lowest level before the speed is reduced, then step 3 will be executed.

[0098] Step 3, determine the current temperature T of the inner tube. 内管 Compared with the inner tube temperature T 40s ago 内管40s前 The size relationship, and whether it is T 内管 >T2. If T 内管 -T 内管40s前 If T ≤ 0℃, then maintain the current state and continue operating; if T 内管 -T内管40s前 >0℃, and T 内管 If the result is >T2, then one of the outdoor fans will be shut down, and step 3 will be executed again to determine whether the other outdoor fan should be stopped; if both outdoor fans have stopped running, then step 4 will be executed.

[0099] In some embodiments, the control unit 104 controls the opening and closing states of the first and second diversion valves based on the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature, including:

[0100] The control unit 104 is further configured to, after both the first and second fans are turned off, determine whether the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before a second set time, and whether the indoor heat exchanger tube temperature at the current moment is greater than a second threshold. The specific functions and processing of this control unit 104 are described in step S410.

[0101] The control unit 104 is further configured to close either the first diversion valve or the second diversion valve if the current indoor heat exchanger tube temperature is greater than the indoor heat exchanger tube temperature before the second set time, and the current indoor heat exchanger tube temperature is greater than the second threshold. The specific functions and processing of this control unit 104 are described in step S420.

[0102] If shutting down all fans still fails to suppress the rise in indoor heat exchanger pipe temperature, then control the opening and closing of the diversion valve to control the refrigerant to flow only through a portion of the outdoor heat exchanger coils, reducing the heat exchange area and thus reducing the heat exchange capacity. This further reduces the heat exchange efficiency of the outdoor heat exchanger for the refrigerant and lowers the temperature of the refrigerant discharged from the compressor, thereby reducing the heat released by the indoor heat exchanger.

[0103] If the current indoor heat exchanger tube temperature is higher than the indoor heat exchanger tube temperature 40 seconds ago, and also higher than 58℃, it indicates that the indoor heat exchanger tube temperature is still rising. At this point, it is necessary to close the diversion valve and reduce the heat exchange area of ​​the outdoor heat exchanger. Since the heat exchange coils corresponding to the first and second diversion valves have the same area, there is no restriction on the order in which the diversion valves are closed.

[0104] When a diversion valve is closed, the outdoor heat exchanger will be in a state where both fans have stopped rotating and the refrigerant is only flowing through a portion of the heat exchange coils. If the indoor heat exchanger's tube temperature is still high in this state, and the indoor heat exchanger's tube temperature exceeds the fourth threshold (which can be 64℃), then the system will be shut down.

[0105] The solution of this invention achieves accurate temperature control by reducing the fan speed of the outdoor heat exchanger, controlling multiple outdoor fans to shut down one by one, and reducing the heat exchange area of ​​the outdoor heat exchanger for refrigerant heat exchange. This reduces the temperature of the indoor heat exchanger, avoids frequent shutdowns of the air conditioner, and prevents the heat released by the indoor heat exchanger from being reduced too much, thus reducing the user experience and ensuring comfort during air conditioner use.

[0106] In some embodiments, the control unit 104 controls the opening and closing states of the first and second diversion valves based on the outdoor heat exchanger tube temperature, including: determining whether the coil temperature of the flow path in the first and second flow paths where the diversion valve is not closed is less than a third threshold, which may be 2°C; if the coil temperature of the flow path in the first and second flow paths where the diversion valve is not closed is less than the third threshold, then the unclosed diversion valve is closed, and the other diversion valve is opened; then the opening and closing states of the first and second diversion valves are controlled again based on the outdoor heat exchanger tube temperature.

[0107] Because one refrigerant flow path is closed, the refrigerant only exchanges heat in a portion of the coils within the outdoor heat exchanger. This causes the temperature of that portion of the coil to drop more rapidly. Therefore, to prevent the temperature of this coil from becoming too low and causing frost, when the temperature of this coil is below 2°C, the corresponding diverter valve is closed, and the diverter valve of the other flow path is opened, allowing the refrigerant to exchange heat in the other flow path. This alternating operation prevents excessive indoor heating while avoiding insufficient compressor overheating due to coil frost, which could affect the compressor's reliability.

[0108] like Figure 8 As shown, the method of the present invention further includes:

[0109] Step 4, using the current inner tube temperature T 内管 Compared with the inner tube temperature T 40s ago 内管40s前 The magnitude of the temperature difference determines whether the inner tube temperature is still rising. If T... 内管 -T 内管40s前 If the temperature is >0℃, then close the diversion valve 1, which controls the upper part of the outdoor heat exchanger, to further reduce the heat exchange area of ​​the outdoor heat exchanger and reduce the heat exchange capacity of the outdoor heat exchanger. Then proceed to step 5.

[0110] Step 5: Detect the pipe temperature T of the lower part of the outdoor heat exchanger. 外管2 And determine whether T 外管2 <T3, if T 外管2 If the temperature is less than T3, then open the upper diversion valve 1 and close the diversion valve 2, switching the outdoor heat exchanger to the upper section for heat exchange. At this time, measure the pipe temperature T of the upper section of the outdoor heat exchanger. 外管1 And determine whether T 外管1 <T3, if T外管1 If the value is less than T3, then the lower diversion valve 2 is opened and the diversion valve 1 is closed, switching the outdoor heat exchanger to the lower part for heat exchange. This allows the upper and lower parts of the outdoor heat exchanger to work alternately, preventing the outdoor heat exchanger from becoming too cold and frosting, which could lead to insufficient superheat at the bottom of the compressor and affect the compressor's operational reliability over long-term operation.

[0111] In some embodiments, the apparatus of the present invention further includes: the acquisition unit 102, which is specifically configured to acquire the interval time from the air conditioner stopping to starting when the air conditioner is turned on if the air conditioner stops due to excessively high indoor heat exchanger pipe temperature; and the control unit 104, which is specifically configured to control the speed of the first fan and the second fan when the air conditioner is turned on according to the interval time.

[0112] The control unit 104 controls the speed of the first and second fans when the air conditioner is turned on according to the interval time, including: if the interval time is less than or equal to a third set time, controlling the speed of the first and second fans to a set speed; if the interval time is greater than a fourth set time, controlling the speed of the first and second fans to a low fan speed; if the interval time is greater than the third set time and less than or equal to the fourth set time, controlling the speed of the first and second fans to a speed one level lower than the set speed. The third set time can be 3 minutes, and the fourth set time can be 6 minutes.

[0113] To prevent the air conditioner from shutting down again due to excessively high indoor heat exchanger pipe temperature when restarting after being turned off, the outdoor fan speed is controlled immediately upon startup. If the interval between shutdown and startup is less than 3 minutes, it indicates poor room insulation, a rapid temperature drop, a high cooling load, and a large heat demand; in this case, the air conditioner should operate at the preset speed. If the interval is greater than 3 minutes but less than 6 minutes, it indicates a moderate cooling load and a moderate heat demand; in this case, the outdoor fan speed should be reduced by one level to prevent high-temperature shutdown. If the interval is greater than 6 minutes, it indicates a low cooling load and a small heat demand; in this case, the outdoor fan should operate at a low speed to ensure the room's heat requirements are met while preventing high-temperature shutdown.

[0114] Since the processing and functions implemented by the device in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0115] The technical solution of this invention divides the refrigerant flow path in the outdoor heat exchanger into a first flow path and a second flow path, which are connected in parallel. Both the first and second flow paths are equipped with fans and diverter valves. After the air conditioner is turned on and operates in heating mode, it acquires the indoor ambient temperature, the indoor heat exchanger tube temperature, and the outdoor heat exchanger tube temperature. It then determines whether the indoor ambient temperature is greater than or equal to the set temperature. If the indoor ambient temperature is greater than or equal to the set temperature, it controls the operating status of the first and second fans, as well as the opening and closing status of the first and second diverter valves, based on the indoor and outdoor heat exchanger tube temperatures. By controlling the operating status of the outdoor fans and the opening and closing status of the diverter valves, multi-level adjustment of the indoor heat exchanger tube temperature is achieved. This solves the problem of frequent air conditioner shutdowns due to excessively high temperatures at the indoor heat exchanger, while achieving precise temperature control and avoiding large temperature ranges when adjusting the indoor heat exchanger temperature, thus improving the user experience.

[0116] According to an embodiment of the present invention, an air conditioner corresponding to an air conditioner control device is also provided. This air conditioner may include the air conditioner control device described above.

[0117] Since the processing and functions implemented by the air conditioner in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned device, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0118] The technical solution of this invention divides the refrigerant flow path in the outdoor heat exchanger into a first flow path and a second flow path, which are connected in parallel. Both the first and second flow paths are equipped with fans and diverter valves. After the air conditioner is turned on and operates in heating mode, it acquires the indoor ambient temperature, the indoor heat exchanger tube temperature, and the outdoor heat exchanger tube temperature. It then determines whether the indoor ambient temperature is greater than or equal to the set temperature. If the indoor ambient temperature is greater than or equal to the set temperature, it controls the operating status of the first and second fans, as well as the opening and closing status of the first and second diverter valves, based on the indoor and outdoor heat exchanger tube temperatures. By controlling the operating status of the outdoor fans and the opening and closing status of the diverter valves, multi-level adjustment of the indoor heat exchanger tube temperature is achieved. This solves the problem of frequent air conditioner shutdowns due to excessively high temperatures at the indoor heat exchanger, while achieving precise temperature control and avoiding large temperature ranges when adjusting the indoor heat exchanger temperature, thus improving the user experience.

[0119] According to an embodiment of the present invention, a storage medium corresponding to an air conditioner control method is also provided, the storage medium including a stored program, wherein the program controls the device where the storage medium is located to execute the air conditioner control method described above when it is executed.

[0120] Since the processing and functions implemented by the storage medium in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0121] The technical solution of this invention divides the refrigerant flow path in the outdoor heat exchanger into a first flow path and a second flow path, which are connected in parallel. Both the first and second flow paths are equipped with fans and diverter valves. After the air conditioner is turned on and operates in heating mode, it acquires the indoor ambient temperature, the indoor heat exchanger tube temperature, and the outdoor heat exchanger tube temperature. It then determines whether the indoor ambient temperature is greater than or equal to the set temperature. If the indoor ambient temperature is greater than or equal to the set temperature, it controls the operating status of the first and second fans, as well as the opening and closing status of the first and second diverter valves, based on the indoor and outdoor heat exchanger tube temperatures. By controlling the operating status of the outdoor fans and the opening and closing status of the diverter valves, multi-level adjustment of the indoor heat exchanger tube temperature is achieved. This solves the problem of frequent air conditioner shutdowns due to excessively high temperatures at the indoor heat exchanger, while achieving precise temperature control and avoiding large temperature ranges when adjusting the indoor heat exchanger temperature, thus improving the user experience.

[0122] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0123] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that, The air conditioner includes an indoor heat exchanger and an outdoor heat exchanger; the refrigerant flow path in the outdoor heat exchanger is divided into a first flow path and a second flow path, which are arranged in parallel and have the same refrigerant flow direction; the outdoor heat exchanger has a first fan, a second fan, a first diversion valve, and a second diversion valve; the first diversion valve is located at the refrigerant inlet of the first flow path and is used to control the opening and closing of the first flow path; the second diversion valve is located at the refrigerant inlet of the second flow path and is used to control the opening and closing of the second flow path; the first fan dissipates heat for the first flow path, and the second fan dissipates heat for the second flow path; The method includes: After the air conditioner is turned on and runs in heating mode, the indoor ambient temperature, indoor heat exchanger tube temperature, and outdoor heat exchanger tube temperature are obtained; wherein, the outdoor heat exchanger tube temperature includes the coil tube temperature at the first flow path and the coil tube temperature at the second flow path. Determine whether the indoor ambient temperature is greater than or equal to the set temperature; If the indoor ambient temperature is greater than or equal to the set temperature, the operating status of the first fan and the second fan, as well as the opening and closing status of the first diversion valve and the second diversion valve, are controlled according to the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature.

2. The air conditioning control method according to claim 1, characterized in that, Controlling the operating status of the first and second fans based on the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature includes: Determine whether the temperature of the indoor heat exchanger tubes is greater than a first threshold. If the temperature of the indoor heat exchanger tube is greater than the first threshold, then determine whether the speed of the first fan and the second fan is the lowest speed. If neither the first fan nor the second fan operates at its minimum speed, the speed of the first fan and the second fan will be reduced by one level, and after a first set time, the speed of the first fan and the second fan will be further reduced based on the temperature of the indoor heat exchanger tubes. If the speed of the first fan and the second fan is at the lowest speed, then after a second set time, it is determined whether to shut down either the first fan or the second fan based on the temperature of the indoor heat exchanger tubes.

3. The air conditioning control method according to claim 2, characterized in that, Determining whether to shut down either the first fan or the second fan based on the indoor heat exchanger tube temperature includes: Determine whether the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and whether the indoor heat exchanger tube temperature at the current moment is greater than the second threshold. If the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and the indoor heat exchanger tube temperature at the current moment is greater than the second threshold, then either the first fan or the second fan is turned off. After that, at the second set time interval, it is determined whether to turn off the other of the first fan and the second fan based on the indoor heat exchanger tube temperature.

4. The air conditioning control method according to claim 1, characterized in that, Controlling the opening and closing states of the first and second diversion valves based on the indoor heat exchanger tube temperature includes: After both the first and second fans are turned off, determine whether the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature before the second set time, and whether the indoor heat exchanger tube temperature at the current moment is greater than the second threshold. If the indoor heat exchanger tube temperature at the current moment is greater than the indoor heat exchanger tube temperature at the second set time, and the indoor heat exchanger tube temperature at the current moment is greater than the second threshold, then either the first diversion valve or the second diversion valve shall be closed.

5. The air conditioning control method according to claim 4, characterized in that, Controlling the opening and closing states of the first and second diversion valves based on the outdoor heat exchanger pipe temperature includes: After closing either the first or the second diverter valve, determine whether the coil temperature of the flow path in the first or the second flow path where the diverter valve is not closed is less than the third threshold. If the coil temperature of the flow path in the first flow path and the second flow path where the diversion valve is not closed is less than the third threshold, then the unclosed diversion valve is closed, and the other diversion valve is opened at the same time. Then, the opening and closing status of the first and second diversion valves are controlled again based on the outdoor heat exchanger pipe temperature.

6. The air conditioning control method according to any one of claims 1-5, characterized in that, Also includes: If the air conditioner stops due to excessively high indoor heat exchanger pipe temperature, then when the air conditioner is turned on, the interval time from when the air conditioner stops to when it starts is obtained. Controlling the speed of the first and second fans when the air conditioner is turned on according to the interval includes: If the interval time is less than or equal to the third set time, then the speed of the first fan and the second fan is controlled to the set speed. If the interval time is greater than the fourth set time, then the speed of the first fan and the second fan is controlled to be the low speed. If the interval time is greater than the third set time and less than or equal to the fourth set time, then the speed of the first fan and the second fan is controlled to be one level lower than the set speed.

7. A control device for an air conditioner, characterized in that, The air conditioner includes an indoor heat exchanger and an outdoor heat exchanger; the refrigerant flow path in the outdoor heat exchanger is divided into a first flow path and a second flow path, which are arranged in parallel; the outdoor heat exchanger has a first fan, a second fan, a first diversion valve, and a second diversion valve; the first diversion valve is located at the refrigerant inlet of the first flow path and is used to control the opening and closing of the first flow path; the second diversion valve is located at the refrigerant inlet of the second flow path and is used to control the opening and closing of the second flow path; the first fan dissipates heat for the first flow path, and the second fan dissipates heat for the second flow path; The device includes: The acquisition unit is configured to acquire the indoor ambient temperature, the indoor heat exchanger tube temperature, and the outdoor heat exchanger tube temperature after the air conditioner is turned on and running in heating mode; wherein, the outdoor heat exchanger tube temperature includes the coil tube temperature at the first flow path and the coil tube temperature at the second flow path. The control unit is configured to determine whether the indoor ambient temperature is greater than or equal to a set temperature. The control unit is further configured to, if the indoor ambient temperature is greater than or equal to a set temperature, control the operating status of the first fan and the second fan, as well as the opening and closing status of the first diversion valve and the second diversion valve, based on the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature.

8. The air conditioner control device according to claim 7, characterized in that, The control unit controls the operating status of the first fan and the second fan based on the indoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature, including: Determine whether the temperature of the indoor heat exchanger tubes is greater than a first threshold. If the temperature of the indoor heat exchanger tube is greater than the first threshold, then determine whether the speed of the first fan and the second fan is the lowest speed. If neither the first fan nor the second fan operates at its minimum speed, the speed of the first fan and the second fan will be reduced by one level, and after a first set time, the speed of the first fan and the second fan will be further reduced based on the temperature of the indoor heat exchanger tubes. If the speed of the first fan and the second fan is at the lowest speed, then after a second set time, it is determined whether to shut down either the first fan or the second fan based on the temperature of the indoor heat exchanger tubes.

9. An air conditioner, characterized in that, include: The control device for an air conditioner as described in any one of claims 7 to 8.

10. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the air conditioning control method according to any one of claims 1 to 6.

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