Heat pump air conditioner defrost program control method, device and controller

Abstract

The present invention relates to the field of intelligent control technology, and specifically to a heat pump air conditioner defrost program control method, device, and controller. The method comprises: recording the compressor operating time when the air conditioner is in operation; when the compressor operating time reaches a first preset time, causing the air conditioner to enter a normal defrost mode; after the air conditioner enters the normal defrost mode for a second preset time, entering a detection cycle; within the detection cycle, determining whether a condition for exiting the defrost mode has been met; if so, causing the air conditioner to exit the defrost mode; and when the defrost mode operation reaches the maximum defrost time, causing the air conditioner to exit the defrost mode. The technical solution provided by the present invention controls entry into the defrost mode by using the compressor operating time, simplifies the conditions for entering the defrost mode, and dynamically adjusts the duration of the defrost mode by determining whether the condition for exiting the defrost mode has been met, thereby increasing the defrost effect, maximizing the degree of defrost, and reducing the impact on normal heating.

Description

Technical Field

[0001] The present invention relates to the field of intelligent control technology, and in particular to a heat pump air conditioner defrost program control method, device and controller. Background Art

[0002] For heat pump air conditioners that use outdoor air as their heat source, when the condenser surface temperature drops below zero degrees Celsius, moisture in the air will condense into frost on the condenser surface, forming a frost layer. This frost layer not only affects heat transfer but also reduces the air flow cross-section, increasing air flow resistance and even completely blocking the passage, rendering the heat pump inoperable. Therefore, defrosting is a very important step when using a heat pump air conditioner in winter.

[0003] However, since air conditioner outdoor units generally lack ambient temperature and humidity sensors, the defrost process is primarily controlled by the internal unit's heat exchanger tube temperature and the internal ambient temperature. This can lead to detection anomalies in exceptionally rainy or snowy weather, which can easily prevent defrosting or cause incomplete defrosting, further reducing heating capacity in the next cycle. In severe cases, this can cause pipe failures during air conditioner operation, impacting defrosting effectiveness and causing incomplete defrosting, which in turn affects normal heating. For example, in winter, when temperatures drop below zero degrees Celsius and are accompanied by rain and snow, ice can easily form on the air conditioner outdoor unit. If the rain and snow persist for a long time, the ice can become increasingly thick, impacting defrosting effectiveness. Incomplete defrosting can lead to extremely poor heating performance.

[0004] Therefore, the current defrost program control method of the heat pump air conditioner will cause detection abnormalities if the air conditioner is in special rainy or snowy weather, affecting the defrost effect, resulting in incomplete defrost and affecting normal heating. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a heat pump air conditioner defrost program control method, device and controller to solve the problem in the prior art that if the air conditioner is in special rainy or snowy weather, detection abnormalities will occur, affecting the defrost effect, resulting in incomplete defrost and affecting normal heating.

[0006] According to a first aspect of an embodiment of the present invention, a method for controlling a defrost program of a heat pump air conditioner is provided, comprising:

[0007] When the air conditioner is running, record the compressor running time;

[0008] When the compressor operation time reaches a first preset time, the air conditioner enters a normal defrost mode;

[0009] After the air conditioner enters the normal defrost mode for a second preset time, it enters the detection cycle;

[0010] During the detection cycle, determine whether the conditions for exiting the defrost mode are met;

[0011] If yes, the air conditioner is exited from the defrost mode;

[0012] When the defrost mode reaches the maximum defrost time, the air conditioner will exit the defrost mode.

[0013] Preferably, the step of determining whether the condition for exiting the defrost mode is met during the detection period includes:

[0014] Continuously obtain the inner tube temperature parameters and record the lowest inner tube temperature value;

[0015] In the detection cycle, it is determined whether the inner tube temperature parameter is greater than the set temperature within a continuous first set time period, where the set temperature is set based on the lowest inner tube temperature value.

[0016] Preferably, after determining whether the inner tube temperature parameter is greater than the set temperature for a continuous first set time, the method further includes:

[0017] If not, determining whether there is a second consecutive set time in which the inner tube temperature parameter is greater than the minimum inner tube temperature value, and the second set time is greater than the first set time;

[0018] If the inner tube temperature parameter is greater than the minimum inner tube temperature value within the second set time, the air conditioner will exit the defrost mode;

[0019] If the inner tube temperature parameter is not greater than the minimum inner tube temperature value within the second consecutive set time, the duration of the detection cycle is extended to the maximum defrosting time.

[0020] Preferably, when the air conditioner is running, recording the running time of the compressor further includes:

[0021] When the air conditioner is running, determine whether the air conditioner has high temperature protection;

[0022] If so, the air conditioner enters high temperature protection mode, and after the high temperature protection ends, the air conditioner enters high temperature protection defrost mode;

[0023] After the air conditioner enters the high temperature protection defrost mode for the third preset time, it enters the detection cycle.

[0024] Preferably, if yes, then making the air conditioner exit the defrost mode further includes:

[0025] If the conditions for exiting the defrost mode are met, the defrost mode is delayed for the third set time, and then the air conditioner exits the defrost mode.

[0026] Preferably, when the air conditioner is running, after recording the running time of the compressor, the method further includes:

[0027] Determine whether the air conditioner is running in heating mode for the first time after being turned on;

[0028] If so, when the compressor operation time reaches a fourth preset time, the air conditioner enters a normal defrost mode;

[0029] The fourth preset time length is shorter than the first preset time length.

[0030] Preferably, the step of extending the detection period to the maximum defrost time further comprises:

[0031] Determining whether the accumulated operating time of the compressor is greater than a fifth preset time;

[0032] If not, set the maximum defrost time to the fourth setting time;

[0033] If yes, set the maximum defrost time to the fifth setting time;

[0034] The fourth set time is greater than the fifth set time.

[0035] According to a second aspect of an embodiment of the present invention, there is provided a heat pump air conditioner defrost program control device, comprising:

[0036] The operating time recording module is used to record the operating time of the compressor when the air conditioner is running;

[0037] The defrost control module is used to make the air conditioner enter the normal defrost mode when the compressor operation time reaches the first preset time; after the air conditioner enters the normal defrost mode for a second preset time, it enters the detection cycle; during the detection cycle, it determines whether the conditions for exiting the defrost mode are met; if so, the air conditioner exits the defrost mode; when the defrost mode operation reaches the maximum defrost time, the air conditioner exits the defrost mode.

[0038] Preferably, the device further comprises:

[0039] The temperature acquisition module is used to continuously obtain the inner tube temperature parameters and record the lowest inner tube temperature value;

[0040] The defrost control module is further used to determine whether the inner tube temperature parameter is greater than the set temperature within a continuous first set time within the detection cycle, and the set temperature is set based on the lowest inner tube temperature value.

[0041] According to a third aspect of an embodiment of the present invention, a heat pump air conditioner defrost program controller is provided, comprising:

[0042] A main controller, and a memory connected to the main controller;

[0043] The memory stores program instructions;

[0044] The main controller is used to execute program instructions stored in the memory and perform any of the above methods.

[0045] The technical solutions provided by the embodiments of the present invention may have the following beneficial effects:

[0046] It is understood that the present invention provides a heat pump air conditioner defrost program control method, including: recording the compressor operating time when the air conditioner is running; when the compressor operating time reaches a first preset time, causing the air conditioner to enter a normal defrost mode; after the air conditioner enters the normal defrost mode for a second preset time, entering a detection cycle; within the detection cycle, determining whether the conditions for exiting the defrost mode have been met; if so, causing the air conditioner to exit the defrost mode; when the defrost mode operation reaches the maximum defrost time, causing the air conditioner to exit the defrost mode. It is understood that the technical solution provided by the present invention controls entry into the defrost mode by using the compressor operating time, simplifies the conditions for entering the defrost mode, and dynamically adjusts the duration of the defrost mode by determining whether the conditions for exiting the defrost mode have been met, thereby increasing the defrost effect, maximizing the degree of defrost, and reducing the impact on normal heating.

[0047] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0049] Figure 1 This is a schematic diagram showing the steps of a heat pump air conditioner defrost program control method according to an exemplary embodiment;

[0050] Figure 2 This is a control flow diagram of a heat pump air conditioner defrost program control method according to an exemplary embodiment;

[0051] Figure 3 The present invention is a schematic block diagram of a heat pump air conditioner defrost program control device according to an exemplary embodiment. DETAILED DESCRIPTION

[0052] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0053] Example 1

[0054] Figure 1This is a schematic diagram of a heat pump air conditioner defrost program control method according to an exemplary embodiment. Figure 1 , a heat pump air conditioner defrost program control method, comprising:

[0055] Step S11: When the air conditioner is running, record the running time of the compressor;

[0056] Step S12: When the compressor operation time reaches a first preset time, the air conditioner enters a normal defrost mode;

[0057] Step S13: After the air conditioner enters the normal defrost mode for a second preset time, it enters a detection cycle;

[0058] Step S14: determining whether the conditions for exiting the defrost mode are met within the detection period;

[0059] Step S15: If yes, the air conditioner exits the defrost mode;

[0060] Step S16: When the defrost mode reaches the maximum defrost time, the air conditioner exits the defrost mode.

[0061] In actual practice, the outdoor unit of a heat pump air conditioner generally does not have an ambient temperature sensor, a humidity sensor, etc. In the context of not adding additional components to the outdoor unit, that is, not setting an ambient temperature sensor, a humidity sensor and other parameter sensors on the outdoor unit of the air conditioner, the above-mentioned program control method can increase the defrost effect, maximize the defrost degree, and reduce the impact on normal heating.

[0062] First, while the air conditioner is in operation, the compressor's operating time needs to be continuously recorded. Then, when the compressor's operating time reaches a first preset time, the air conditioner enters regular defrost mode. Preferably, the first preset time can be adjusted based on the size of the air conditioner. For example, a split air conditioner with a capacity of 50 or less can have the first preset time set to 40 minutes or 50 minutes. That is, after the compressor has accumulated 40 minutes of operation, the air conditioner can directly enter defrost mode, simplifying the conditions for entering defrost mode and allowing the air conditioner to periodically enter defrost mode for defrosting.

[0063] After the air conditioner enters the normal defrost mode for a second preset time, it enters the detection cycle. Preferably, the second preset time can be adjusted according to actual conditions. After the air conditioner enters the defrost mode, the air conditioner is in the defrost working state during the period between the second preset time and the time when the air conditioner enters the defrost mode. For example, assuming that the second preset time is set to three minutes, the air conditioner is in the defrost working state for three minutes after entering the defrost mode. After that, when the air conditioner has been in the defrost working state for three minutes, it is determined whether to exit the defrost state and enter the detection cycle for determination. Preferably, the length of the detection cycle can be set according to specific conditions.

[0064] During the detection cycle, it is determined whether the conditions for exiting the defrost mode are met; if so, the air conditioner is caused to exit the defrost mode. In practice, the conditions for exiting the defrost mode can be set according to specific circumstances. After the air conditioner enters the detection cycle, once the conditions for exiting the defrost mode are met, the air conditioner is controlled to exit the defrost mode; if the conditions for exiting the defrost mode are not met during the entire detection cycle, the air conditioner is caused to exit the defrost mode when the defrost mode operation reaches the maximum defrost time.

[0065] In specific application scenarios, the existing defrost control method for heat pump air conditioners primarily controls the defrost process after frosting of the outdoor unit by the internal unit heat exchanger tube temperature and the internal ambient temperature. This can lead to detection anomalies in rainy or snowy weather, affecting the defrost effect and normal heating. By using the defrost control method for heat pump air conditioners provided in this embodiment, entry into defrost mode is controlled solely by the compressor operating time, simplifying the conditions for entering defrost mode. Furthermore, the defrost mode duration can be dynamically adjusted by determining whether the conditions for exiting defrost mode have been met, thereby improving the defrost effect.

[0066] It is understood that the present invention provides a heat pump air conditioner defrost program control method, including: recording the compressor operating time when the air conditioner is running; when the compressor operating time reaches a first preset time, causing the air conditioner to enter a normal defrost mode; after the air conditioner enters the normal defrost mode for a second preset time, entering a detection cycle; within the detection cycle, determining whether the conditions for exiting the defrost mode have been met; if so, causing the air conditioner to exit the defrost mode; when the defrost mode operation reaches the maximum defrost time, causing the air conditioner to exit the defrost mode. It is understood that the technical solution provided by the present invention controls entry into the defrost mode by using the compressor operating time, simplifies the conditions for entering the defrost mode, and dynamically adjusts the duration of the defrost mode by determining whether the conditions for exiting the defrost mode have been met, thereby increasing the defrost effect, maximizing the degree of defrost, and reducing the impact on normal heating.

[0067] It should be noted that, during the detection cycle, determining whether the conditions for exiting the defrost mode are met includes:

[0068] Continuously obtain the inner tube temperature parameters and record the lowest inner tube temperature value;

[0069] In the detection cycle, it is determined whether the inner tube temperature parameter is greater than the set temperature within a continuous first set time period, where the set temperature is set based on the lowest inner tube temperature value.

[0070] In specific practice, the condition for exiting the defrost mode can be set by the inner tube temperature parameter. The condition for exiting the defrost mode in this embodiment is: within the detection cycle, determine whether the inner tube temperature parameter is greater than the set temperature within a continuous first set time, and the set temperature is set based on the minimum inner tube temperature value. Preferably, the first set time can be set according to the specific situation, and the set temperature is usually higher than the minimum inner tube temperature value. For example, the first set time can be set to 30 seconds, and the set temperature value can be set to be one degree higher than the minimum inner tube temperature value. If so, if the inner tube temperature parameter is higher than the set temperature within any continuous 30 seconds, it means that the defrost degree is sufficient and the condition for exiting the defrost mode is met, thereby controlling the air conditioner to exit the defrost mode.

[0071] It is understandable that by setting the conditions for exiting the defrost mode in this way, it is possible to accurately determine whether the defrost degree is sufficient during the defrost mode operation, so that the air conditioner can minimize the time of entering the defrost mode while ensuring that the defrost degree is sufficient.

[0072] It should be noted that after determining whether the inner tube temperature parameter is greater than the set temperature for consecutive first set time periods, the following steps are also included:

[0073] If not, determining whether there is a second consecutive set time in which the inner tube temperature parameter is greater than the minimum inner tube temperature value, and the second set time is greater than the first set time;

[0074] If the inner tube temperature parameter is greater than the minimum inner tube temperature value within the second set time, the air conditioner will exit the defrost mode;

[0075] If the inner tube temperature parameter is not greater than the minimum inner tube temperature value within the second consecutive set time, the duration of the detection cycle is extended to the maximum defrosting time.

[0076] In specific practice, if the inner tube temperature parameter is not greater than the set temperature within the first set time, a secondary judgment can be performed. The condition for the secondary judgment is: determine whether the inner tube temperature parameter is greater than the minimum inner tube temperature value within the second set time, and the second set time is greater than the first set time. Preferably, assuming that the first set time is 30 seconds and the second set time is 9 minutes, if the air conditioner inner tube temperature appears to be higher than the minimum inner tube temperature value for 9 consecutive minutes, it means that the pipe temperature has been detected to have an upward trend for 9 consecutive minutes, proving that the defrost degree is high and the air conditioner has begun to have a certain heating effect. Therefore, the air conditioner can be controlled to exit the defrost mode; if the air conditioner inner tube temperature is not higher than the minimum inner tube temperature value for 9 consecutive minutes, it means that the air conditioner defrost effect is not obvious, and the detection cycle is extended to the maximum defrost time to increase the running time of the defrost mode.

[0077] It can be understood that this embodiment adds a secondary judgment condition to determine whether the air conditioner can exit the defrost mode, which can more accurately judge the defrost degree of the air conditioner, thereby reducing the running time of the defrost mode and preventing the air conditioner from high temperature protection.

[0078] It should be noted that, when the air conditioner is running, recording the compressor running time also includes:

[0079] When the air conditioner is running, determine whether the air conditioner has high temperature protection;

[0080] If so, the air conditioner enters high temperature protection mode, and after the high temperature protection ends, the air conditioner enters high temperature protection defrost mode;

[0081] After the air conditioner enters the high temperature protection defrost mode for the third preset time, it enters the detection cycle.

[0082] In practice, if the air conditioner's indoor unit is installed in a corner, causing hot air to circulate locally, the indoor heat exchanger temperature can rise after the air conditioner has been running for a while, easily triggering the high-temperature protection. This high-temperature protection stops the outdoor fan while the compressor operates normally. Systems using R410A or R32 refrigerants are also prone to high-pressure protection. During this period, the outdoor unit temperature drops rapidly, potentially below -15°C. If rain or water droplets from the air conditioner drip onto the heat exchanger, they can quickly form ice, affecting the defrosting effect and necessitating immediate defrosting. Therefore, if the high-temperature protection trigger occurs while the air conditioner is operating, the air conditioner enters high-temperature protection mode. After the high-temperature protection mode expires, the air conditioner enters high-temperature protection defrost mode. After the air conditioner enters high-temperature protection defrost mode for a third preset duration, the detection cycle begins. Preferably, the third preset duration is set to a short time, such as 1 minute. In specific application scenarios, if the high-temperature protection triggers during air conditioner operation, the air conditioner immediately enters defrost mode after the high-temperature protection expires. After a short period of time (the third preset duration) in defrost mode, the detection cycle begins.

[0083] It can be understood that this embodiment fully considers the defrost condition after the air conditioner enters high-temperature protection, adjusts the working time of the defrost mode, reduces the heating loss of the whole machine caused by entering defrost, and avoids high-temperature protection from occurring again.

[0084] At the same time, if the defrost time is too long, the exhaust pressure of the outdoor unit will rise sharply, triggering the system high-pressure protection shutdown. By setting the third preset time to 1 minute, energy saving can also be achieved.

[0085] It should be noted that if yes, then the air conditioner is exited from the defrost mode, further comprising:

[0086] If the conditions for exiting the defrost mode are met, the defrost mode is delayed for the third set time, and then the air conditioner exits the defrost mode.

[0087] In practice, if the conditions for exiting the defrost mode are met within the detection cycle, the defrost mode time can be extended before exiting the defrost mode. Preferably, the third set time can be 1 minute, that is, after the conditions for exiting the defrost mode are met and before exiting the defrost mode, the defrost mode time is extended by 1 minute. It is understandable that increasing the defrost mode time can ensure clean defrosting. At the same time, the third set time should not be too long. Setting it to 1 minute can ensure that high temperature protection does not occur.

[0088] It should be noted that when the air conditioner is running, after recording the compressor running time, the method further includes:

[0089] Determine whether the air conditioner is running in heating mode for the first time after being turned on;

[0090] If so, when the compressor operation time reaches a fourth preset time, the air conditioner enters a normal defrost mode;

[0091] The fourth preset time length is shorter than the first preset time length.

[0092] In practice, when the air conditioner is running, it can be determined whether it is the first time the air conditioner is running in heating mode after being turned on. If it is the first time the air conditioner is running in heating mode after being turned on, the air conditioner will enter normal defrost mode when the compressor operation time reaches a fourth preset time; the fourth preset time is less than the first preset time. Preferably, the fourth preset time can be adjusted according to the size of the air conditioner. For example, in a specific application scenario, the fourth preset time can be set to 10 minutes, that is, the air conditioner enters defrost mode 10 minutes after the user turns on the air conditioner.

[0093] It can be understood that by setting the fourth preset time to enter the defrost mode after powering on, it can effectively avoid the problem of poor heating effect caused by the user's power on and off action when there is frost or water on the outdoor unit, and avoid further frosting of the outdoor unit.

[0094] It should be noted that extending the detection period to the maximum defrost time also includes:

[0095] Determining whether the accumulated operating time of the compressor is greater than a fifth preset time;

[0096] If not, set the maximum defrost time to the fourth setting time;

[0097] If yes, set the maximum defrost time to the fifth setting time;

[0098] The fourth set time is greater than the fifth set time.

[0099] In practice, the maximum defrost time for an air conditioner can be set based on the cumulative compressor operating time. In a specific application scenario, the fifth preset time can be set to 190 minutes, the fourth set time to 12 minutes, and the fifth set time to 10 minutes. If the air conditioner compressor runs continuously for less than 190 minutes, the maximum defrost time is 12 minutes. If the air conditioner compressor runs continuously for 190 minutes or more, the maximum defrost time is 10 minutes.

[0100] It can be understood that by determining whether the cumulative running time of the compressor is greater than the fifth preset time to set the maximum defrost time, defrosting can be performed to the maximum extent according to the running time of the compressor, increasing the defrost effect and greatly improving the defrost effect.

[0101] Figure 2 This is a control flow diagram of a heat pump air conditioner defrost program control method according to an exemplary embodiment. Figure 2 When the air conditioner is powered off or turned on after being shut down, it is necessary to record the running time of the compressor; then determine whether it is the first time to run in heating mode. If so, enter the normal defrost mode when the compressor has been running for 10 minutes; if it is not the first time to run in heating mode, determine whether high temperature protection occurs. If high temperature protection occurs, the air conditioner enters high temperature protection, and enters high temperature protection defrost mode after the high temperature protection ends; if high temperature protection does not occur, enter the normal defrost mode when the compressor has been running for 40 minutes.

[0102] After entering the normal defrost mode, the air conditioner is controlled to defrost for 3 minutes, and then enters the detection cycle; after entering the high temperature protection defrost mode, the air conditioner is controlled to defrost for 1 minute, and then enters the detection cycle.

[0103] After entering the detection cycle, determine whether the inner tube temperature parameter is greater than the set temperature for 30 consecutive seconds. If so, the air conditioner will be controlled to exit the defrost mode after a 1-minute delay in the defrost mode. If not, further determine whether the inner tube temperature parameter is greater than the minimum inner tube temperature value for 9 consecutive minutes. If so, exit the defrost mode. If not, exit the defrost mode after the defrost mode reaches the maximum defrost time.

[0104] Example 2

[0105] Figure 3 This is a schematic block diagram of a heat pump air conditioner defrost program control device according to an exemplary embodiment. Figure 3 , provides a heat pump air conditioner defrost program control device, comprising:

[0106] The operation time recording module 101 is used to record the operation time of the compressor when the air conditioner is running;

[0107] The defrost control module 102 is used to make the air conditioner enter the normal defrost mode when the compressor operation time reaches a first preset time; enter the detection cycle after the air conditioner enters the normal defrost mode for a second preset time; within the detection cycle, determine whether the conditions for exiting the defrost mode are met; if so, make the air conditioner exit the defrost mode; when the defrost mode operation reaches the maximum defrost time, make the air conditioner exit the defrost mode.

[0108] It is understood that the defrost program control device for a heat pump air conditioner provided by the present invention records the compressor operating time when the air conditioner is running through the operating time recording module 101; when the compressor operating time reaches a first preset time, the air conditioner enters the normal defrost mode through the defrost control module 102; after the air conditioner enters the normal defrost mode for a second preset time, it enters a detection cycle; within the detection cycle, it determines whether the conditions for exiting the defrost mode are met; if so, the air conditioner exits the defrost mode; when the defrost mode operation reaches the maximum defrost time, the air conditioner exits the defrost mode. It is understood that the technical solution provided by the present invention controls entry into the defrost mode through the compressor operating time, simplifies the conditions for entering the defrost mode, and dynamically adjusts the duration of the defrost mode by determining whether the conditions for exiting the defrost mode are met, which can increase the defrost effect, maximize the degree of defrost, and reduce the impact on normal heating.

[0109] It should be noted that the device further includes:

[0110] The temperature acquisition module is used to continuously obtain the inner tube temperature parameters and record the lowest inner tube temperature value;

[0111] The defrost control module is further used to determine whether the inner tube temperature parameter is greater than the set temperature within a continuous first set time within the detection cycle, and the set temperature is set based on the lowest inner tube temperature value.

[0112] It can be understood that by setting the exit conditions of the defrost mode through the inner tube temperature parameters obtained by the temperature acquisition module, it is possible to accurately determine whether the defrost degree is sufficient during the defrost mode operation, so that the air conditioner can minimize the time of entering the defrost mode while ensuring that the defrost degree is sufficient.

[0113] Example 3

[0114] According to a third aspect of an embodiment of the present invention, a heat pump air conditioner defrost program controller is provided, comprising:

[0115] A main controller, and a memory connected to the main controller;

[0116] The memory stores program instructions;

[0117] The main controller is used to execute program instructions stored in the memory and perform any of the above methods.

[0118] It is understood that the heat pump air conditioner defrost program controller described in this embodiment records the compressor operating time when the air conditioner is running; when the compressor operating time reaches a first preset time, the air conditioner enters the normal defrost mode; after the air conditioner enters the normal defrost mode for a second preset time, it enters a detection cycle; within the detection cycle, it determines whether the conditions for exiting the defrost mode are met; if so, the air conditioner exits the defrost mode; when the defrost mode operation reaches the maximum defrost time, the air conditioner exits the defrost mode. It is understood that the technical solution provided by the present invention controls entry into the defrost mode by the compressor operating time, simplifies the conditions for entering the defrost mode, and dynamically adjusts the duration of the defrost mode by determining whether the conditions for exiting the defrost mode are met, thereby increasing the defrost effect, maximizing the degree of defrost, and reducing the impact on normal heating.

[0119] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0120] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is at least two.

[0121] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0122] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0123] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0124] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

[0125] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0126] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0127] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A heat pump air conditioner defrost program control method, characterized in that: include: When the air conditioner is running, record the compressor running time; When the compressor operation time reaches a first preset time, the air conditioner enters a normal defrost mode; After the air conditioner enters the normal defrost mode for a second preset time, it enters the detection cycle; During the detection cycle, determine whether the conditions for exiting the defrost mode are met; If yes, the air conditioner is exited from the defrost mode; If not, when the defrost mode reaches the maximum defrost time, the air conditioner will exit the defrost mode; The determination of whether the conditions for exiting the defrost mode are met during the detection period includes: Continuously obtain the inner tube temperature parameters and record the lowest inner tube temperature value; During the detection period, determining whether the inner tube temperature parameter is greater than a set temperature for a continuous first set time period, wherein the set temperature is set based on the lowest inner tube temperature value; After determining whether the inner tube temperature parameter is greater than the set temperature for a continuous first set time, the method further includes: If not, determining whether the inner tube temperature parameter is greater than the minimum inner tube temperature value within a second consecutive set time, and the second set time is greater than the first set time; If the inner tube temperature parameter is greater than the minimum inner tube temperature value within the second set time, the air conditioner will exit the defrost mode; If the inner tube temperature parameter is not greater than the minimum inner tube temperature value within the second consecutive set time, the duration of the detection cycle is extended to the maximum defrosting time.

2. The method according to claim 1, characterized in that The method of recording the compressor operation time when the air conditioner is running also includes: When the air conditioner is running, determine whether the air conditioner has high temperature protection; If so, the air conditioner enters high temperature protection mode, and after the high temperature protection ends, the air conditioner enters high temperature protection defrost mode; After the air conditioner enters the high temperature protection defrost mode for the third preset time, it enters the detection cycle.

3. The method according to claim 1, characterized in that If so, the air conditioner is exited from the defrost mode, further comprising: If the conditions for exiting the defrost mode are met, the defrost mode is delayed for the third set time, and then the air conditioner exits the defrost mode.

4. The method according to claim 1, wherein When the air conditioner is running, after recording the running time of the compressor, the method further includes: Determine whether the air conditioner is running in heating mode for the first time after being turned on; If so, when the compressor operation time reaches a fourth preset time, the air conditioner enters a normal defrost mode; The fourth preset time length is shorter than the first preset time length.

5. The method according to claim 1, wherein The extending the detection period to the maximum defrost time further includes: Determining whether the accumulated operating time of the compressor is greater than a fifth preset time; If not, set the maximum defrost time to the fourth setting time; If yes, set the maximum defrost time to the fifth setting time; The fourth set time is greater than the fifth set time.

6. A heat pump air conditioner defrost program control device, characterized in that: include: The operating time recording module is used to record the operating time of the compressor when the air conditioner is running; A defrost control module is configured to enable the air conditioner to enter a normal defrost mode when the compressor operation time reaches a first preset time; After the air conditioner enters the conventional defrost mode for a second preset time, it enters a detection cycle; during the detection cycle, it is determined whether the conditions for exiting the defrost mode are met; If yes, the air conditioner is exited from the defrost mode; If not, when the defrost mode reaches the maximum defrost time, the air conditioner will exit the defrost mode; Also includes: The temperature acquisition module is used to continuously obtain the inner tube temperature parameters and record the lowest inner tube temperature value; The defrost control module is further configured to determine whether, within a detection period, the inner tube temperature parameter is greater than a set temperature for a continuous first set time period, where the set temperature is set based on the lowest inner tube temperature value; After determining whether the inner tube temperature parameter is greater than the set temperature within the first continuous set time, the method further includes: if not, determining whether the inner tube temperature parameter is greater than the minimum inner tube temperature value within the second continuous set time, and the second set time is greater than the first set time; if the inner tube temperature parameter is greater than the minimum inner tube temperature value within the second continuous set time, the air conditioner exits the defrost mode; if the inner tube temperature parameter is not greater than the minimum inner tube temperature value within the second continuous set time, the detection cycle duration is extended to the maximum defrost time.

7. A heat pump air conditioner defrost program controller, characterized in that: include: A main controller, and a memory connected to the main controller; The memory stores program instructions; The main controller is used to execute program instructions stored in the memory and perform the method according to any one of claims 1 to 6.

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