Air conditioner, method and device for identifying blockage of air inlet and air outlet of air conditioner, medium and program product

Abstract

The invention provides an air conditioner and an air inlet and outlet blockage recognition method and device thereof, a medium and a program product, the air conditioner is a portable air conditioner, and the air inlet and outlet blockage recognition method comprises the steps that after the air conditioner is started to run, whether the fan load of the cold end or the hot end of the air conditioner abnormally changes or not is detected; if it is detected that the fan load abnormally changes, whether the change value of the coil pipe temperature of the cold end or the hot end of the air conditioner relative to the coil pipe temperature before the fan load abnormally changes within second preset time is larger than or equal to a corresponding preset temperature threshold value or not is judged; and if it is judged that the change value is larger than or equal to the corresponding preset temperature threshold value, it is determined that the air inlet and / or the air outlet are / is blocked. According to the scheme, the air conditioner air inlet and outlet obstacles can be recognized in time.

Description

Technical Field

[0001] The present invention relates to the field of control, and in particular to an air conditioner and a method, device, medium and program product for identifying blockage of an air inlet and outlet thereof, and specifically to an air conditioner and a method, device, storage medium and computer program product for identifying blockage of an air inlet and outlet thereof. Background Art

[0002] The functions and uses of air conditioners are becoming more and more refined, such as air conditioners for the elderly, parking air conditioners, and portable air conditioners. Because portable air conditioners started late, some functions have not yet been developed or improved, such as timely identification of obstacles and reminders. Compared with traditional air conditioners, because the air conditioners are installed in a fixed position and the air inlet and outlet positions are relatively high, the air inlet and outlet positions are generally not blocked or interfered by obstacles. Portable air conditioners, such as tent air conditioners, are located at a lower position, so it is particularly important to have a function that can identify obstacles. Summary of the invention

[0003] The main purpose of the present invention is to overcome the defects of the above-mentioned related technologies and to provide an air conditioner and its inlet and outlet blockage identification method, device, medium and program product to solve the problem of identifying the inlet and outlet of a portable air conditioner in the related technology due to obstacles blocking the cold end or hot end.

[0004] On one hand, the present invention provides a method for identifying blockage of an air inlet and outlet of an air conditioner, wherein the air conditioner is a portable air conditioner, and the method for identifying blockage of an air inlet and outlet comprises: after the air conditioner is started and operated, detecting whether an abnormal mutation occurs in the fan load of the cold end or the hot end of the air conditioner; the cold end and the hot end of the air conditioner respectively have corresponding cold end fans and hot end fans; if an abnormal mutation occurs in the fan load of the cold end or the hot end is detected, determining whether a change value of a coil temperature of the cold end or the hot end of the air conditioner relative to a coil temperature before an abnormal mutation occurs in the fan load within a second preset time is greater than or equal to a corresponding preset temperature threshold; if it is determined that a change value of a coil temperature of the cold end or the hot end of the air conditioner relative to a coil temperature before an abnormal mutation occurs in the fan load within the second preset time is greater than or equal to a corresponding preset temperature threshold, determining that the air inlet and / or the air outlet of the air conditioner is blocked.

[0005] Optionally, it also includes: if it is determined that the air inlet and / or air outlet of the air conditioner is blocked, a corresponding prompt is given for the blockage situation of the air inlet and / or air outlet of the air conditioner; the blockage situation includes: cold-end air outlet blockage, cold-end air inlet blockage, hot-end air outlet blockage and hot-end air inlet blockage; wherein, if the actual motor operating power of the cold-end fan or the hot-end fan is greater than the rated operating power corresponding to the current speed, it is judged that the cold-end or hot-end air outlet is blocked; if the actual motor operating power of the cold-end fan or the hot-end fan is less than the rated operating power corresponding to the current speed, it is judged that the cold-end or hot-end air inlet is blocked.

[0006] Optionally, detecting whether the fan load of the air conditioner has undergone an abnormal mutation includes: detecting whether the difference between the current actual motor operating power of the cold-end fan or the hot-end fan of the air conditioner and the rated motor operating power corresponding to the current speed is greater than or equal to a first preset power value, or whether the difference between the current actual motor operating power and the rated motor operating power corresponding to the current speed is greater than or equal to a second preset power value; if it is detected that the difference between the actual motor operating power of the cold-end fan or the hot-end fan and the rated motor operating power corresponding to the current speed is greater than or equal to the first preset power value, or the difference between the rated motor operating power corresponding to the current speed and the actual motor operating power is greater than or equal to the second preset power value, then it is determined that the load of the cold-end fan or the hot-end fan of the air conditioner has undergone an abnormal mutation; or, detecting whether a change value of a preset parameter of the cold-end fan or the hot-end fan within a first preset time is greater than a preset parameter threshold; if it is detected that the change value of the preset parameter of the cold-end fan or the hot-end fan within the first preset time is greater than the preset parameter threshold, then it is determined that the load of the cold-end fan or the hot-end fan of the air conditioner has undergone an abnormal mutation.

[0007] Optionally, the method further includes: if it is detected that changes of preset parameters of the cold end and the hot end of the air conditioner within a first preset time are greater than preset parameter thresholds, a corresponding prompt is given to remind the user to handle the obstacle.

[0008] Optionally, determining whether a change value of the coil temperature at the cold end or the hot end of the air conditioner relative to the coil temperature before the abnormal sudden change in the fan load within the second preset time is greater than or equal to a preset temperature threshold includes: determining whether a difference between the coil temperature before the abnormal sudden change in the cold end fan load and the coil temperature after the abnormal sudden change in the fan load within the second preset time is greater than or equal to a first preset temperature threshold; or determining whether a difference between the coil temperature after the abnormal sudden change in the hot end fan load and the coil temperature before the abnormal sudden change in the fan load within the second preset time is greater than or equal to a second preset temperature threshold.

[0009] On the other hand, the present invention provides an air inlet and outlet blockage identification device for an air conditioner, wherein the air conditioner is a portable air conditioner, and the air inlet and outlet blockage identification device comprises: a detection unit, which detects whether an abnormal mutation occurs in the fan load of the cold end or the hot end of the air conditioner after the air conditioner is started and operated; the cold end and the hot end of the air conditioner respectively have corresponding cold end fans and hot end fans; a judgment unit, which is used to judge whether a change value of the coil temperature of the cold end or the hot end of the air conditioner relative to the coil temperature before the abnormal mutation occurs in the fan load within a second preset time is greater than or equal to a corresponding preset temperature threshold if the detection unit detects that the fan load of the cold end or the hot end has an abnormal mutation, and a determination unit, which is used to determine that the air inlet and / or the air outlet of the air conditioner is blocked if the judgment unit judges that a change value of the coil temperature of the cold end or the hot end of the air conditioner relative to the coil temperature before the abnormal mutation occurs in the fan load within the second preset time is greater than or equal to a corresponding preset temperature threshold.

[0010] Optionally, it also includes: a first prompt unit, which is used to give corresponding prompts on the blockage of the air inlet and / or air outlet of the air conditioner if it is determined that the air inlet and / or air outlet of the air conditioner is blocked; the blockage conditions include: blockage of the cold-end air outlet, blockage of the cold-end air inlet, blockage of the hot-end air outlet and blockage of the hot-end air inlet; wherein, if the actual motor operating power of the cold-end fan or the hot-end fan is greater than the rated operating power corresponding to the current speed, it is judged that the cold-end or hot-end air outlet is blocked; if the actual motor operating power of the cold-end fan or the hot-end fan is less than the rated operating power corresponding to the current speed, it is judged that the cold-end or hot-end air inlet is blocked.

[0011] Optionally, the detection unit detects whether the fan load of the air conditioner has an abnormal mutation, including: detecting whether the difference between the current actual motor operating power of the cold-end fan or the hot-end fan of the air conditioner and the rated motor operating power corresponding to the current speed is greater than or equal to a first preset power value, or whether the difference between the current actual motor operating power and the rated motor operating power corresponding to the current speed is greater than or equal to a second preset power value; if it is detected that the difference between the actual motor operating power of the cold-end fan or the hot-end fan and the rated motor operating power corresponding to the current speed is greater than or equal to the first preset power value, or the difference between the rated motor operating power corresponding to the current speed and the actual motor operating power is greater than or equal to the second preset power value, it is determined that the load of the cold-end fan or the hot-end fan of the air conditioner has an abnormal mutation; or, detecting whether the change value of the preset parameter of the cold-end fan or the hot-end fan within a first preset time is greater than a preset parameter threshold; if it is detected that the change value of the preset parameter of the cold-end fan or the hot-end fan within the first preset time is greater than the preset parameter threshold, it is determined that the load of the cold-end fan or the hot-end fan of the air conditioner has an abnormal mutation.

[0012] Optionally, it also includes: a second prompt unit, which is used to make corresponding prompts to remind the user to handle obstacles if the detection unit detects that the changes of the preset parameters of the cold end and the hot end of the air conditioner within the first preset time are greater than the preset parameter threshold.

[0013] Optionally, the judgment unit judges whether a change value of the coil temperature at the cold end or the hot end of the air conditioner relative to the coil temperature before the abnormal sudden change in the fan load within the second preset time is greater than or equal to a preset temperature threshold, including: judging whether the difference between the coil temperature before the abnormal sudden change in the cold end fan load and the coil temperature after the abnormal sudden change in the fan load within the second preset time is greater than or equal to a first preset temperature threshold; or judging whether the difference between the coil temperature after the abnormal sudden change in the hot end fan load and the coil temperature before the abnormal sudden change in the fan load within the second preset time is greater than or equal to the second preset temperature threshold.

[0014] Another aspect of the present invention provides a storage medium having a computer program stored thereon, wherein the program implements the steps of any of the aforementioned methods when executed by a processor.

[0015] In another aspect, the present invention provides an air conditioner, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the aforementioned methods when executing the program.

[0016] In another aspect, the present invention provides an air conditioner, comprising any of the aforementioned air inlet and outlet blockage identification devices.

[0017] In yet another aspect, the present invention provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0018] According to the technical solution of the present invention, obstacles at the air inlet and outlet of the cold or hot end of the air conditioner can be identified in time to remind the user to move the obstacles away, thereby avoiding problems such as sudden increase in air conditioning noise, sudden drop in heat and cold temperatures, and easy triggering of reliability protection by the system, thereby improving user experience.

[0019] According to the technical solution of the present invention, it is first preliminarily determined that the air duct is blocked based on the preset parameters of the cold-end or hot-end fan, and then further determined based on the cold-end or hot-end coil temperature to avoid misjudgment. At the same time, the air conditioner can continue to operate normally without affecting the cooling output, thereby avoiding affecting the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 It is a method schematic diagram of an embodiment of a method for identifying blockage of an air inlet and outlet of an air conditioner provided by the present invention;

[0022] Figure 2 It is a method schematic diagram of a specific embodiment of the method for identifying blockage of an air inlet and outlet of an air conditioner provided by the present invention;

[0023] Figure 3 It is a structural block diagram of an embodiment of the air inlet and outlet blockage identification device of an air conditioner provided by the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] The present invention provides a method for identifying blockage of an air inlet and outlet of an air conditioner. The air conditioner may be a portable air conditioner, such as a tent air conditioner. The air conditioner has a cold end (evaporator) and a hot end (condenser). The cold end and the hot end of the air conditioner have corresponding cold end fans and hot end fans, respectively. The cold end and the hot end may have corresponding cold end air outlets and air inlets, and hot end air outlets and air inlets, respectively.

[0027] Figure 1 It is a method schematic diagram of an embodiment of the method for identifying air inlet and outlet blockage provided by the present invention.

[0028] like Figure 1 As shown, according to one embodiment of the present invention, the air inlet and outlet blockage identification method includes at least step S110, step S120 and step S130.

[0029] Step S110, after the air conditioner is started, detecting whether the fan load at the cold end or the hot end of the air conditioner has an abnormal sudden change.

[0030] For example, after the air conditioner is turned on and started running, the mainboard starts to record the air conditioner operating parameters, such as the cold end and hot end coil temperature, and the motor operating power of the cold end and hot end fans. Specifically, it can be determined whether the cold end or hot end fan load has an abnormal sudden change by detecting the motor operating power or motor current of the cold end or hot end fan.

[0031] In a specific implementation, by detecting the motor operating power of the cold-end fan or the hot-end fan of the air conditioner, it is determined whether an abnormal sudden change occurs in the fan load at the cold-end or the hot-end of the air conditioner.

[0032] After the fan motor is matched with the fan blades to confirm the load, the general stable operating power or current under normal air duct (unobstructed) is basically determined. Under extreme conditions, when the air outlet direction is completely blocked, the wind resistance is maximum and the power is highest. When the air inlet is completely blocked, there is no load (vacuuming) and the power is minimum. Table 1 shows the experimental data of a normal load operation test simulation. The specific motor parameters can be determined according to the actual test of different models.

[0033] Table 1

[0034]

[0035] Specifically, it is detected whether the difference between the current actual motor operating power of the cold-end fan or the hot-end fan of the air conditioner and the rated motor operating power corresponding to the current speed is greater than or equal to a first preset power value, or whether the difference between the current actual motor operating power and the rated motor operating power corresponding to the current speed is greater than or equal to a second preset power value; if it is detected that the difference between the actual motor operating power of the cold-end fan or the hot-end fan and the rated motor operating power corresponding to the current speed is greater than or equal to the first preset power value, or the difference between the rated motor operating power corresponding to the current speed and the actual motor operating power is greater than or equal to the second preset power value, it is determined that an abnormal mutation has occurred in the load of the cold-end fan or the hot-end fan of the air conditioner.

[0036] For example, referring to Table 1, when the speed is 1200r / min, the rated power is 30W. When it is detected that the difference between the actual motor operating power of the cold-end fan or the hot-end fan and the rated motor operating power corresponding to the current speed is greater than or equal to 3W (the first preset power value), that is, the actual power is greater than or equal to 33W, or the difference between the rated motor operating power corresponding to the current speed and the actual motor operating power of the cold-end fan or the hot-end fan is greater than or equal to 5W (the second preset power value), that is, the actual power is less than or equal to 25W, then it is determined that the fan load of the air conditioner has an abnormal mutation.

[0037] In another specific embodiment, it is detected whether the change value of the preset parameter of the cold-end fan or the hot-end fan within the first preset time is greater than the preset parameter threshold; if it is detected that the change value of the preset parameter of the cold-end fan or the hot-end fan within the first preset time is greater than the preset parameter threshold, it is determined that an abnormal mutation occurs in the load of the cold-end fan or the hot-end fan of the air conditioner.

[0038] The preset parameter may be the motor operating power and / or motor current of the cold-end fan or the hot-end fan. For example, when the preset parameter is the motor operating power of the cold-end fan or the hot-end fan, it is determined whether the change value of the motor operating power of the cold-end fan or the hot-end fan within the first preset time is greater than the preset power change threshold. If it is determined that the change value of the motor operating power of the cold-end fan or the hot-end fan within the first preset time is greater than the preset power change threshold, it is determined that an abnormal sudden change occurs in the load of the cold-end fan or the hot-end fan of the air conditioner.

[0039] For example, when the air inlet or outlet is completely blocked, the motor power suddenly fluctuates by more than 5W, and the motor power sudden change value accounts for more than 16% of the total power. Regardless of the difference or the proportion, it is still relatively large. By considering the actual situation, when the air inlet and outlet are blocked, the obstruction situation is based on the actual situation. If it is completely blocked, the normal power change of the motor is the maximum limit and the minimum limit. When it is partially blocked, the motor power fluctuation value is small. For example, when the fluctuation exceeds 2W, the preset power change threshold is taken as 2W. If the motor power change is greater than 2W, the next step of confirmation is performed. At the same time, when the air inlet and outlet of the general fan are blocked, the power change is generally completed in 1-3s, and the response time is short. Therefore, the first preset time can be taken as 5s, for example.

[0040] Step S120, if it is detected that the fan load at the cold end or the hot end has an abnormal sudden change, it is determined whether the change value of the coil temperature at the cold end or the hot end of the air conditioner within the second preset time relative to the coil temperature before the abnormal sudden change in the fan load is greater than or equal to the corresponding preset temperature threshold.

[0041] Specifically, if an abnormal mutation occurs in the fan load at the cold end, the coil temperature at the cold end is detected, and it is determined whether the difference between the coil temperature before the abnormal mutation occurs in the fan load at the cold end and the coil temperature after the abnormal mutation occurs in the fan load within a second preset time is greater than or equal to the first preset temperature threshold (i.e., the preset temperature threshold corresponding to the cold end); if an abnormal mutation occurs in the fan load at the hot end, the coil temperature at the hot end is detected, and it is determined whether the difference between the coil temperature after the abnormal mutation occurs in the fan load at the hot end and the coil temperature before the abnormal mutation occurs in the fan load within the second preset time is greater than or equal to the second preset temperature threshold (i.e., the preset temperature threshold corresponding to the hot end).

[0042] For example, the temperature of the corresponding cold-end and hot-end coil temperature sensors is detected. When the coil temperature difference (before the abnormal sudden change in the fan load) is ≥ t within T time (the second preset time, for example, 30 seconds), if it is the cold end, t corresponds to tc, that is, the first preset temperature threshold value. If it is the hot end, t corresponds to th, that is, the second preset temperature threshold value.

[0043] When the air conditioning system is operating normally, the coil temperatures corresponding to the cold end and the hot end, that is, the evaporator and the condenser, are generally stable. When the air duct is blocked, whether it is the cold end or the hot end, when it reaches a certain level, the heat exchange (capacity) will decrease sharply, which is reflected in the system as a decrease in the cold end coil temperature or an increase in the hot end coil temperature. Therefore, after the preliminary determination that the air duct is blocked, the coil temperature is further determined to confirm the difference in system pipe temperature capacity caused by the air duct blockage. When the difference is large, that is, the degree of heat exchange reduction is large, it affects the overall cooling and heating effect of the air conditioning system, and the user needs to be reminded to deal with the obstacle. For example, according to experience, the change of coil temperature lags behind the fan power, but it will change accordingly within 30s. When the coil temperature is relatively stable, the change exceeds 1°C, and the capacity impact is already very large, especially at the cold end. Therefore, the second preset time can be set to 30s, and the preset temperature threshold can be set to the first preset temperature threshold of 1°C corresponding to the cold end, and the second preset temperature threshold corresponding to the hot end is 2°C.

[0044] In order to distinguish the different values ​​of the cold end and the hot end, according to experience, when the difference in coil temperature change exceeds 1°C, the heat exchange will be significantly different, especially at the cold end. For example, the preset temperature threshold (first preset temperature threshold) corresponding to the cold end can be taken as tc=1°C. The difference between the coil temperature before the abnormal sudden change of the cold end fan load and the coil temperature after the abnormal sudden change within T time (second preset time) is equal to the difference between the coil temperature detected before the abnormal sudden change of the cold end fan load and the lowest coil temperature within T time after the abnormal sudden change. Although the coil temperature is reduced, the air volume is reduced, and the output cooling capacity is actually reduced. The preset temperature threshold (second preset temperature threshold) corresponding to the hot end can be taken as th=2°C. The difference between the coil temperature after the abnormal sudden change of the hot end fan load and the coil temperature before the abnormal sudden change of the fan load within the second preset time is equal to the difference between the highest coil temperature within T time (second preset time) after the abnormal sudden change of the fan load and the coil temperature detected before the abnormal sudden change. Because the hot end air duct is blocked, the heat dissipation capacity of the hot end is reduced.

[0045] If it is judged that the change value of the coil temperature of the cold end or the hot end of the air conditioner relative to the coil temperature before the abnormal mutation of the fan load within the second preset time is greater than or equal to the corresponding preset temperature threshold, that is, the difference between the coil temperature before the abnormal mutation of the cold end fan load and the coil temperature after the abnormal mutation of the fan load within the second preset time is greater than or equal to the first preset temperature threshold, or it is judged that the difference between the coil temperature after the abnormal mutation of the hot end fan load and the coil temperature before the abnormal mutation of the fan load within the second preset time is greater than or equal to the second preset temperature threshold, it can be considered that the impact on the cold and heat output is acceptable, no processing is done, and normal operation is carried out.

[0046] Preferably, if the changes of the preset parameters of the cold end and the hot end of the air conditioner within the first preset time are greater than the preset parameter threshold, a corresponding prompt is given to remind the user to handle the obstacle. Specifically, if the changes of the preset parameters of the cold end and the hot end of the air conditioner within the first preset time are greater than the preset parameter threshold, that is, the cold end and the hot end are blocked at the same time, the blockage of the air inlet and / or the air outlet can be directly prompted, and the blockage conditions include, for example: cold end air outlet blockage, cold end air inlet blockage, hot end air outlet blockage and hot end air inlet blockage. Among them, if the actual motor operating power of the cold end fan or the hot end fan is greater than the rated operating power corresponding to the current speed, it is judged that the cold end or the hot end air outlet is blocked, that is, the cold end or the hot end air outlet is blocked; if the actual motor operating power of the cold end fan or the hot end fan is less than the rated operating power corresponding to the current speed, it is judged that the cold end or the hot end air inlet is blocked, that is, the cold end or the hot end air inlet is blocked.

[0047] Step S130, if it is determined that the change value of the coil temperature at the cold end or the hot end of the air conditioner within the second preset time relative to the coil temperature before the abnormal mutation of the fan load occurs is greater than or equal to the corresponding preset temperature threshold, it is determined that the air inlet and / or outlet of the air conditioner is blocked.

[0048] Specifically, if it is determined that the difference between the coil temperature before the abnormal sudden change in the cold-end fan load and the coil temperature after the abnormal sudden change in the fan load within the second preset time is greater than or equal to the first preset temperature threshold; or, if it is determined that the difference between the coil temperature after the abnormal sudden change in the hot-end fan load and the coil temperature before the abnormal sudden change in the fan load within the second preset time is greater than or equal to the second preset temperature threshold, it is determined that the air inlet and / or air outlet of the hot end or the cold end of the air conditioner is blocked.

[0049] Furthermore, if it is determined that the air inlet and / or air outlet of the air conditioner is blocked, a corresponding prompt is given for the blockage of the air inlet and / or air outlet of the air conditioner to remind the user to handle the obstacle. The blockage condition includes, for example: cold end air outlet blockage, cold end air inlet blockage, hot end air outlet blockage, and hot end air inlet blockage.

[0050] Among them, if the actual motor operating power of the cold-end fan or the hot-end fan is greater than the rated operating power corresponding to the current speed, it is judged that the air outlet of the cold-end or hot-end is blocked, that is, the air outlet of the cold-end or hot-end is blocked; if the actual motor operating power of the cold-end fan or the hot-end fan is less than the rated operating power corresponding to the current speed, it is judged that the air inlet of the cold-end or hot-end is blocked, that is, the air inlet of the cold-end or hot-end is blocked.

[0051] In order to clearly illustrate the technical solution of the present invention, the execution process of the method for identifying blockage of the air inlet and outlet of the air conditioner provided by the present invention is described below with reference to a specific embodiment.

[0052] Figure 2 FIG. 1 is a schematic diagram of a method for identifying blockage of an air inlet and outlet of an air conditioner provided by the present invention. Figure 2 As shown, after the air conditioner starts running, when it is judged that the fan load changes suddenly abnormally, it is judged that the motor power of the cold end or hot end changes. When it is judged that the motor power of the cold end or hot end changes more than the preset power value within the preset time (for example, when the change exceeds 2W within 5s), it is judged that the cold end or hot end is seriously blocked; if it is not satisfied, it will run normally, and the cold end coil temperature and the hot end coil temperature before the abnormal change of the cold end and hot end fan will be recorded synchronously. If the cold end and the hot end change at the same time and exceed the value, the data is directly blocked, and the user is reminded to deal with the obstacle.

[0053] If it is determined that the cold-end or hot-end motor power changes more than the preset power value within the preset time, the corresponding cold-end or hot-end coil temperature is detected to determine whether the change value of the cold-end or hot-end coil temperature within the T time (relative to the coil temperature before the abnormal sudden change of the fan load) is greater than or equal to the preset temperature threshold t; wherein the first preset temperature threshold corresponding to the cold end is tc, and the second preset temperature threshold corresponding to the hot end is th; that is, it is determined whether the cold end satisfies that the difference between the coil temperature before the abnormal sudden change of the fan load and the coil temperature after the abnormal sudden change of the fan load within the T time is greater than or equal to the first preset temperature threshold tc (that is, it is determined whether the difference between the coil temperature before the abnormal sudden change of the fan load and the coil temperature after the abnormal sudden change of the fan load within the T time is greater than or equal to the first preset temperature threshold tc). The difference between the lowest coil temperature within the time is greater than or equal to the first preset temperature threshold tc), or whether the difference between the coil temperature after the abnormal sudden change of the fan load and the coil temperature before the abnormal sudden change of the fan load within T time at the hot end is greater than or equal to the second preset temperature threshold th (that is, whether the difference between the highest coil temperature within T time after the abnormal sudden change of the fan load and the coil temperature before the abnormal sudden change of the fan load is greater than or equal to the second preset temperature threshold th); if the change value of the coil temperature of the cold end or the hot end within T time (relative to the coil temperature before the abnormal sudden change of the fan load) is not greater than or equal to the preset temperature threshold t, it is considered that the impact on the cooling and heating output is acceptable, no processing is performed, and normal operation is carried out;

[0054] If the change value of the coil temperature at the cold end or the hot end within the T time (relative to the coil temperature before the abnormal sudden change of the fan load) is greater than or equal to the preset temperature threshold t, an alarm is directly output to remind the user to deal with the obstacle, and a reminder is directly given at the specific blocked location, that is, a reminder that the air outlet of the cold end or the hot end is blocked, or the air inlet of the cold end or the hot end is blocked.

[0055] According to the above embodiment of the present invention, after determining that the fan load is abnormal, it is further determined whether the air inlet and outlet are blocked based on the coil temperature. It is possible to detect whether the air inlet and outlet are blocked due to special factors during the use of the portable air conditioner, such as children blocking the air inlet and outlet. Generally, the user will check whether the air conditioner is blocked before or during normal startup. If a child blocks the air outlet, the system can detect and remind the user.

[0056] The present invention also provides an air inlet and outlet blockage identification device for an air conditioner. The air conditioner may be a portable air conditioner, such as a tent air conditioner. The air conditioner has a cold end (evaporator) and a hot end (condenser). The cold end and the hot end of the air conditioner have corresponding cold end fans and hot end fans, respectively. The cold end and the hot end may have corresponding cold end air outlets and air inlets, and hot end air outlets and air inlets, respectively.

[0057] Figure 3 1 is a structural block diagram of an embodiment of the air inlet and outlet blockage identification device of the air conditioner provided by the present invention. Figure 3 As shown, the air inlet and outlet blockage identification device 100 of the air conditioner includes: a detection unit 110, a judgment unit 120 and a determination unit 130.

[0058] The detection unit 110 detects whether an abnormal sudden change occurs in the fan load at the cold end or the hot end of the air conditioner after the air conditioner is started; the cold end and the hot end of the air conditioner have corresponding cold end fans and hot end fans respectively.

[0059] For example, after the air conditioner is turned on and starts running, the mainboard starts to record the air conditioner operating parameters, such as the cold-end and hot-end coil temperatures, and the motor operating power of the cold-end and hot-end fans. Specifically, it is possible to determine whether an abnormal mutation occurs in the fan load at the cold end or hot end by detecting the motor operating power or motor current of the fan at the cold end or hot end. In a specific embodiment, the detection unit 110 detects whether an abnormal mutation occurs in the fan load at the cold end or hot end of the air conditioner, which may specifically include: determining whether an abnormal mutation occurs in the fan load at the cold end or hot end of the air conditioner by detecting the motor operating power of the fan at the cold end or hot end of the air conditioner.

[0060] After the fan motor is matched with the fan blades to confirm the load, the general stable operating power or current under normal air duct (unobstructed) is basically determined. Under extreme conditions, when the air outlet direction is completely blocked, the wind resistance is maximum and the power is highest. When the air inlet is completely blocked, there is no load (vacuuming) and the power is minimum. Table 1 shows the experimental data of a normal load operation test simulation. The specific motor parameters can be determined according to the actual test of different models.

[0061] Table 1

[0062]

[0063] Specifically, it is detected whether the difference between the current actual motor operating power of the cold-end fan or the hot-end fan of the air conditioner and the rated motor operating power corresponding to the current speed is greater than or equal to a first preset power value, or whether the difference between the current actual motor operating power and the rated motor operating power corresponding to the current speed is greater than or equal to a second preset power value; if it is detected that the difference between the actual motor operating power of the cold-end fan or the hot-end fan and the rated motor operating power corresponding to the current speed is greater than or equal to the first preset power value, or the difference between the rated motor operating power corresponding to the current speed and the actual motor operating power is greater than or equal to the second preset power value, it is determined that an abnormal mutation has occurred in the load of the cold-end fan or the hot-end fan of the air conditioner.

[0064] For example, referring to Table 1, when the speed is 1200r / min, the rated power is 30W. When it is detected that the difference between the actual motor operating power of the cold-end fan or the hot-end fan and the rated motor operating power corresponding to the current speed is greater than or equal to 3W (the first preset power value), that is, the actual power is greater than or equal to 33W, or the difference between the rated motor operating power corresponding to the current speed and the actual motor operating power of the cold-end fan or the hot-end fan is greater than or equal to 5W (the second preset power value), that is, the actual power is less than or equal to 25W, then it is determined that the fan load of the air conditioner has an abnormal mutation.

[0065] In another specific embodiment, the detection unit 110 detects whether an abnormal mutation occurs in the fan load at the cold end or the hot end of the air conditioner, which may specifically include: detecting whether a change value of a preset parameter of the cold end fan or the hot end fan within a first preset time is greater than a preset parameter threshold; if it is detected that a change value of a preset parameter of the cold end fan or the hot end fan within the first preset time is greater than the preset parameter threshold, it is determined that an abnormal mutation occurs in the load of the cold end fan or the hot end fan of the air conditioner.

[0066] The preset parameter may be the motor operating power and / or motor current of the cold-end fan or the hot-end fan. For example, when the preset parameter is the motor operating power of the cold-end fan or the hot-end fan, it is determined whether a change value of the motor operating power of the cold-end fan or the hot-end fan within a first preset time is greater than a preset power change threshold.

[0067] For example, when the air inlet or outlet is completely blocked, the motor power suddenly fluctuates by more than 5W, and the motor power sudden change value accounts for more than 16% of the total power. Regardless of the difference or the proportion, it is still relatively large. By considering the actual situation, when the air inlet and outlet are blocked, the obstruction situation is based on the actual situation. If it is completely blocked, the normal power change of the motor is the maximum limit and the minimum limit. When it is partially blocked, the motor power fluctuation value is small. For example, when the fluctuation exceeds 2W, the preset power change threshold is taken as 2W. If the motor power change is greater than 2W, the next step of confirmation is performed. At the same time, when the air inlet and outlet of the general fan are blocked, the power change is generally completed in 1-3s, and the response time is short. Therefore, the first preset time can be taken as 5s, for example.

[0068] The judgment unit 120 is used to judge whether the change value of the coil temperature of the cold end or the hot end of the air conditioner relative to the coil temperature before the abnormal mutation of the fan load occurs within the second preset time is greater than or equal to the corresponding preset temperature threshold if the detection unit 110 detects that the fan load of the cold end or the hot end has an abnormal mutation.

[0069] Specifically, if an abnormal mutation occurs in the fan load at the cold end, the coil temperature at the cold end is detected, and it is determined whether the difference between the coil temperature before the abnormal mutation occurs in the fan load at the cold end and the coil temperature after the abnormal mutation occurs in the fan load within a second preset time is greater than or equal to the first preset temperature threshold (i.e., the preset temperature threshold corresponding to the cold end); if an abnormal mutation occurs in the fan load at the hot end, the coil temperature at the hot end is detected, and it is determined whether the difference between the coil temperature after the abnormal mutation occurs in the fan load at the hot end and the coil temperature before the abnormal mutation occurs in the fan load within the second preset time is greater than or equal to the second preset temperature threshold (i.e., the preset temperature threshold corresponding to the hot end).

[0070] For example, the temperature of the corresponding cold-end and hot-end coil temperature sensors is detected. When the coil temperature difference (before the abnormal sudden change in the fan load) is ≥ t within T time (the second preset time, for example, 30 seconds), if it is the cold end, t corresponds to tc, that is, the first preset temperature threshold value. If it is the hot end, t corresponds to th, that is, the second preset temperature threshold value.

[0071] When the air conditioning system is operating normally, the coil temperatures corresponding to the cold end and the hot end, that is, the evaporator and the condenser, are generally stable. When the air duct is blocked, whether it is the cold end or the hot end, when it reaches a certain level, the heat exchange (capacity) will decrease sharply, which is reflected in the system as a decrease in the cold end coil temperature or an increase in the hot end coil temperature. Therefore, after the preliminary determination that the air duct is blocked, the coil temperature is further determined to confirm the difference in system pipe temperature capacity caused by the air duct blockage. When the difference is large, that is, the degree of heat exchange reduction is large, it affects the overall cooling and heating effect of the air conditioning system, and the user needs to be reminded to deal with the obstacle. For example, according to experience, the change of coil temperature lags behind the fan power, but it will change accordingly within 30s. When the coil temperature is relatively stable, the change exceeds 1°C, and the capacity impact is already very large, especially at the cold end. Therefore, the second preset time can be set to 30s, and the preset temperature threshold can be set to the first preset temperature threshold of 1°C corresponding to the cold end, and the second preset temperature threshold corresponding to the hot end is 2°C.

[0072] In order to distinguish the different values ​​of the cold end and the hot end, according to experience, when the difference in coil temperature change exceeds 1°C, the heat exchange will be significantly different, especially at the cold end. For example, the preset temperature threshold (first preset temperature threshold) corresponding to the cold end can be taken as tc=1°C, where the difference between the coil temperature before the abnormal sudden change of the cold end fan load and the coil temperature after the abnormal sudden change within T time (second preset time) is equal to the difference between the coil temperature detected before the abnormal sudden change of the cold end fan load and the lowest coil temperature within T time after the abnormal sudden change. Although the coil temperature is reduced, the air volume is reduced, and the output cooling capacity is actually reduced. The preset temperature threshold (second preset temperature threshold) corresponding to the hot end can be taken as th=2°C, wherein the difference between the coil temperature after the abnormal sudden change of the hot end fan load and the coil temperature before the abnormal sudden change of the fan load at T time (second preset time) is equal to the difference between the highest coil temperature within T time after the abnormal sudden change of the fan load and the coil temperature detected before the abnormal sudden change. Because the hot end air duct is blocked, the heat dissipation capacity of the hot end is reduced.

[0073] If it is judged that the change value of the coil temperature of the cold end or the hot end of the air conditioner relative to the coil temperature before the abnormal mutation of the fan load within the second preset time is greater than or equal to the corresponding preset temperature threshold, that is, whether the difference between the coil temperature before the abnormal mutation of the cold end fan load and the coil temperature after the abnormal mutation of the fan load within the second preset time is greater than or equal to the first preset temperature threshold, or whether the difference between the coil temperature after the abnormal mutation of the hot end fan load and the coil temperature before the abnormal mutation of the fan load within the second preset time is greater than or equal to the second preset temperature threshold, it can be considered that the impact on the cold and heat output is acceptable, no processing is done, and normal operation is carried out.

[0074] Preferably, the device 100 further includes: a second prompting unit (not shown), which is used to make a corresponding prompt if the changes of the preset parameters of the cold end and the hot end of the air conditioner detected by the detection unit 110 within the first preset time are greater than the preset parameter threshold, so as to remind the user to handle the obstacle. Specifically, if the changes of the preset parameters of the cold end and the hot end of the air conditioner detected within the first preset time are greater than the preset parameter threshold, that is, the cold end and the hot end are blocked at the same time, the blockage of the air inlet and / or the air outlet can be directly prompted, and the blockage includes, for example: the cold end air outlet is blocked, the cold end air inlet is blocked, the hot end air outlet is blocked, and the hot end air inlet is blocked. Among them, if the actual motor operating power of the cold end fan or the hot end fan is greater than the rated operating power corresponding to the current speed, it is judged that the cold end or the hot end air outlet is blocked, that is, the cold end or the hot end air outlet is blocked; if the actual motor operating power of the cold end fan or the hot end fan is less than the rated operating power corresponding to the current speed, it is judged that the cold end or the hot end air inlet is blocked, that is, the cold end or the hot end air inlet is blocked.

[0075] The determination unit 130 is used to determine that the air inlet and / or outlet of the air conditioner is blocked if the judgment unit determines that the change value of the coil temperature at the cold end or the hot end of the air conditioner within the second preset time relative to the coil temperature before the abnormal mutation of the fan load occurs is greater than or equal to the corresponding preset temperature threshold.

[0076] Specifically, if it is determined that the difference between the coil temperature before the abnormal sudden change in the cold-end fan load and the coil temperature after the abnormal sudden change in the fan load within the second preset time is greater than or equal to the first preset temperature threshold; or, if it is determined that the difference between the coil temperature after the abnormal sudden change in the hot-end fan load and the coil temperature before the abnormal sudden change in the fan load within the second preset time is greater than or equal to the second preset temperature threshold, it is determined that the air inlet and / or air outlet of the hot end or the cold end of the air conditioner is blocked.

[0077] Furthermore, the device 100 may also include a first prompting unit (not shown) for providing a corresponding prompt of the blockage of the air inlet and / or air outlet of the air conditioner if it is determined that the air inlet and / or air outlet of the air conditioner is blocked, so as to remind the user to handle the obstacle. The blockage conditions include, for example: cold end air outlet blockage, cold end air inlet blockage, hot end air outlet blockage, and hot end air inlet blockage.

[0078] Among them, if the actual motor operating power of the cold-end fan or the hot-end fan is greater than the rated operating power corresponding to the current speed, it is judged that the air outlet of the cold-end or hot-end is blocked, that is, the air outlet of the cold-end or hot-end is blocked; if the actual motor operating power of the cold-end fan or the hot-end fan is less than the rated operating power corresponding to the current speed, it is judged that the air inlet of the cold-end or hot-end is blocked, that is, the air inlet of the cold-end or hot-end is blocked.

[0079] The present invention also provides a storage medium corresponding to the method for identifying blockage of the air inlet and outlet of the air conditioner, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0080] The present invention also provides an air conditioner corresponding to the method for identifying blockage of air inlet and outlet of the air conditioner, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the aforementioned methods when executing the computer program.

[0081] The present invention also provides an air conditioner corresponding to the air inlet and outlet blockage identification device of the air conditioner, comprising any of the air inlet and outlet blockage identification devices of the air conditioner described above.

[0082] The present invention also provides a computer program product corresponding to the method for identifying blockage of the air inlet and outlet of the air conditioner, including a computer program, which implements the steps of any of the aforementioned methods when executed by a processor.

[0083] Based on this, the solution provided by the present invention can promptly identify obstacles at the air inlet and outlet of the cold or hot end of the air conditioner to remind the user to remove the obstacles, avoid problems such as sudden increase in air conditioning noise, sudden drop in heat and cold temperatures, and easy triggering of reliability protection by the system, thereby improving user experience.

[0084] The solution provided by the present invention, after initially determining that the air duct is blocked, further judgment is made based on the temperature of the cold-end or hot-end coil to avoid misjudgment. At the same time, the air conditioner can continue to operate normally without affecting the cooling output, thereby avoiding affecting the user's experience.

[0085] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0086] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0087] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0088] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the relevant technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0089] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for identifying blockage of an air inlet and outlet of an air conditioner, wherein the air conditioner is a portable air conditioner, characterized in that: The method for identifying air inlet and outlet blockage includes: After the air conditioner is started, detecting whether the fan load at the cold end or the hot end of the air conditioner has an abnormal sudden change; the cold end and the hot end of the air conditioner have corresponding cold end fans and hot end fans respectively; If it is detected that the fan load at the cold end or the hot end has an abnormal sudden change, it is determined whether the change value of the coil temperature at the cold end or the hot end of the air conditioner within the second preset time relative to the coil temperature before the abnormal sudden change in the fan load is greater than or equal to the corresponding preset temperature threshold; If it is determined that the change value of the coil temperature at the cold end or the hot end of the air conditioner relative to the coil temperature before the abnormal mutation of the fan load occurs within the second preset time is greater than or equal to the corresponding preset temperature threshold, it is determined that the air inlet and / or outlet of the air conditioner is blocked.

2. The method according to claim 1, characterized in that Also includes: If it is determined that the air inlet and / or the air outlet of the air conditioner is blocked, a corresponding prompt is given regarding the blockage of the air inlet and / or the air outlet of the air conditioner; The blocking conditions include: blocking of the cold end air outlet, blocking of the cold end air inlet, blocking of the hot end air outlet and blocking of the hot end air inlet; Among them, if the actual motor operating power of the cold-end fan or the hot-end fan is greater than the rated operating power corresponding to the current speed, it is judged that the cold-end or hot-end air outlet is blocked; if the actual motor operating power of the cold-end fan or the hot-end fan is less than the rated operating power corresponding to the current speed, it is judged that the cold-end or hot-end air inlet is blocked.

3. The method according to claim 1 or 2, characterized in that: Detecting whether the fan load of the air conditioner has an abnormal sudden change, including: Detect whether the difference between the current actual motor operating power of the cold-end fan or the hot-end fan of the air conditioner and the rated motor operating power corresponding to the current speed is greater than or equal to a first preset power value, or whether the difference between the current actual motor operating power and the rated motor operating power corresponding to the current speed is greater than or equal to a second preset power value; If it is detected that the difference between the actual motor operating power of the cold-end fan or the hot-end fan and the rated motor operating power corresponding to the current speed is greater than or equal to a first preset power value, or the difference between the rated motor operating power corresponding to the current speed and the actual motor operating power is greater than or equal to a second preset power value, it is determined that an abnormal mutation occurs in the load of the cold-end fan or the hot-end fan of the air conditioner; or, Detecting whether a change value of a preset parameter of the cold-end fan or the hot-end fan within a first preset time is greater than a preset parameter threshold; If the change value of the preset parameter of the cold-end fan or the hot-end fan detected within the first preset time is greater than the preset parameter threshold, it is determined that an abnormal mutation occurs in the load of the cold-end fan or the hot-end fan of the air conditioner.

4. The method according to claim 3, characterized in that Also includes: If it is detected that changes in the preset parameters of the cold end and the hot end of the air conditioner within the first preset time are greater than the preset parameter threshold, a corresponding prompt is given to remind the user to handle the obstacle.

5. The method according to claim 1 or 2, characterized in that: Determining whether a change value of the coil temperature at the cold end or the hot end of the air conditioner within a second preset time relative to the coil temperature before the abnormal sudden change of the fan load is greater than or equal to a preset temperature threshold includes: Determine whether the difference between the coil temperature before the abnormal sudden change in the cold end fan load and the coil temperature after the abnormal sudden change in the fan load within a second preset time is greater than or equal to a first preset temperature threshold; or, It is determined whether a difference between a coil temperature after an abnormal sudden change in the hot-end fan load and a coil temperature before the abnormal sudden change in the fan load within a second preset time is greater than or equal to a second preset temperature threshold.

6. A device for identifying blockage of an air inlet and outlet of an air conditioner, wherein the air conditioner is a portable air conditioner, characterized in that: The air inlet and outlet blockage identification device comprises: A detection unit, after the air conditioner is started, detects whether the fan load at the cold end or the hot end of the air conditioner has an abnormal mutation; the cold end and the hot end of the air conditioner have corresponding cold end fans and hot end fans respectively; a judgment unit, configured to judge whether a change value of the coil temperature of the cold end or the hot end of the air conditioner relative to the coil temperature before the abnormal sudden change of the fan load occurs within a second preset time is greater than or equal to a corresponding preset temperature threshold value if the detection unit detects that the fan load of the cold end or the hot end has an abnormal sudden change; A determination unit is used to determine that the air inlet and / or outlet of the air conditioner is blocked if the judgment unit determines that the change value of the coil temperature at the cold end or the hot end of the air conditioner within a second preset time relative to the coil temperature before the abnormal mutation of the fan load occurs is greater than or equal to the corresponding preset temperature threshold.

7. The device according to claim 6, characterized in that Also includes: A first prompting unit, configured to, if it is determined that the air inlet and / or the air outlet of the air conditioner is blocked, give a corresponding prompt of the blockage of the air inlet and / or the air outlet of the air conditioner; The blocking conditions include: blocking of the cold end air outlet, blocking of the cold end air inlet, blocking of the hot end air outlet and blocking of the hot end air inlet; Among them, if the actual motor operating power of the cold-end fan or the hot-end fan is greater than the rated operating power corresponding to the current speed, it is judged that the cold-end or hot-end air outlet is blocked; if the actual motor operating power of the cold-end fan or the hot-end fan is less than the rated operating power corresponding to the current speed, it is judged that the cold-end or hot-end air inlet is blocked.

8. A storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the steps of any method described in claims 1-5 are implemented.

9. An air conditioner, characterized in that: The invention comprises a processor, a memory and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method described in any one of claims 1 to 5 are implemented, or the invention comprises an air inlet and outlet blockage identification device described in any one of claims 6 to 7.

10. A computer program product, characterized in that The invention comprises a computer program, which implements the steps of any one of the methods of claims 1 to 5 when executed by a processor.

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