A control method of an air conditioner in a high-temperature cleaning mode

Abstract

The application discloses a kind of high-temperature cleaning mode under air conditioner control method, based on outdoor temperature value, indoor temperature value and coil temperature value are judged, and according to each temperature value determines the initial operating frequency corresponding to control compressor starts high-temperature heating operation;After starting high-temperature heating operation, based on coil temperature value and indoor temperature value are compared;According to the comparison result, if the difference between coil temperature value and indoor temperature value is less than the first threshold value, then switch compressor to operating mode A;If the difference between coil temperature value and indoor temperature value is greater than or equal to the first threshold value, then switch compressor to operating mode B;Wherein, the frequency correction amount in operating mode A is negative, the frequency correction amount in operating mode B is zero, and the respective frequency correction amount is adjusted based on the current compressor operating frequency accordingly;Therefore, it is guaranteed that the air conditioner under high-temperature cleaning mode runs stably, meets user demand and improves user experience.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an air conditioning control method in a high-temperature cleaning mode. Background Technology

[0002] After prolonged use or storage, air conditioners accumulate a large amount of dust inside the indoor unit, and this dust buildup easily breeds bacteria. This dust and bacteria are then blown out through the air vents and spread throughout the room with the airflow. If not cleaned promptly, this can seriously endanger the user's health. Therefore, it is necessary to clean and disinfect air conditioners regularly.

[0003] A method for sterilizing a variable frequency air conditioner, as described in patent CN113669796A, involves operating in heating mode and comparing the surface temperature of the air conditioner's heat exchanger with a preset temperature threshold. Based on this comparison, the compressor's operating frequency and the speed of the indoor and outdoor fans are adjusted to maintain the indoor unit at a high temperature, thus achieving the purpose of cleaning and sterilizing the air conditioner. However, this method does not consider the temperature difference between the outdoor and indoor environments. When the temperature difference is small, if the compressor's operating frequency is still adjusted based on the comparison between the heat exchanger's surface temperature and the preset temperature threshold, it can lead to damage to the air conditioner due to excessive pressure during heating operation, and also result in excessively high air outlet temperatures, negatively impacting the user experience. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an air conditioner control method in a high-temperature cleaning mode. This method determines the compressor to start high-temperature heating operation based on outdoor temperature, indoor temperature, and coil temperature. After starting high-temperature heating operation, the coil temperature and indoor temperature are compared. If the difference between the coil temperature and indoor temperature is less than a first threshold, the compressor is switched to operating mode A. If the difference is greater than or equal to the first threshold, the compressor is switched to operating mode B. This ensures stable operation of the air conditioner in high-temperature cleaning mode, meeting user needs while improving user experience.

[0005] To achieve the above objectives, the present invention provides an air conditioner control method in a high-temperature cleaning mode. The air conditioner includes a coil and a compressor. The air conditioner control method in the high-temperature cleaning mode includes the following steps: Step 1: After the air conditioner receives a signal to activate the high-temperature cleaning mode, it acquires the outdoor temperature value, the indoor temperature value, and the coil temperature value in real time; Step 2: It determines a target frequency based on the outdoor temperature value, the target frequency being negatively correlated with the outdoor temperature value; it determines a frequency correction amount based on the difference between the coil temperature value and the indoor temperature value, the frequency correction amount being used to correct the operating frequency of the compressor; Step 3: It calculates a first sum between the target frequency and the frequency correction amount, and sets the first sum as the initial operating frequency, the initial operating frequency being used to control the compressor to start high-temperature heating operation; wherein, if the initial operating frequency is... If the value is negative, the electric auxiliary heating mode is activated, in which the compressor is off. Step 4: After the compressor starts high-temperature heating operation, the compressor operating frequency, coil temperature value, and indoor temperature value are monitored and obtained at equal time intervals. The difference between the coil temperature value and the indoor temperature value is calculated, and the compressor is switched to operating mode A or B based on the difference. In operating mode A, the frequency correction value is negative, and the compressor is adjusted accordingly based on the current compressor operating frequency. In operating mode B, the frequency correction value is zero, and the compressor is adjusted accordingly based on the current compressor operating frequency. Step 5: During the heating operation for a preset duration, step 4 is repeated to maintain the coil temperature value within the preset range. Step 6: After the high-temperature cleaning mode ends, the air conditioner is turned off.

[0006] Further, determining the target frequency based on the outdoor temperature value includes: pre-dividing the outdoor temperature value into seven temperature ranges; determining the target frequency corresponding to the temperature range to which the outdoor temperature value belongs, wherein: the first temperature range is -∞ to 8℃, and the corresponding target frequency is 80Hz; the second temperature range is 9 to 13℃, and the corresponding target frequency is 70Hz; the third temperature range is 14 to 17℃, and the corresponding target frequency is 60Hz; the fourth temperature range is 18 to 25℃, and the corresponding target frequency is 50Hz; the fifth temperature range is 26 to 29℃, and the corresponding target frequency is 40Hz; the sixth temperature range is 30 to 34℃, and the corresponding target frequency is 30Hz; and the seventh temperature range is 35 to ∞℃, and the corresponding target frequency is 0Hz.

[0007] Furthermore, the frequency correction amount is determined based on the difference between the coil temperature value and the indoor temperature value, including: pre-dividing four difference ranges; calculating the difference between the obtained coil temperature value and the indoor temperature value; and determining the frequency correction amount corresponding to the range to which the difference belongs, wherein the first-level difference range is 0~17, and the corresponding frequency correction amount is -15Hz; the second-level difference range is 17~33, and the corresponding frequency correction amount is -10Hz; the third-level difference range is 33~43, and the corresponding frequency correction amount is -5Hz; and the fourth-level difference range is 43~∞, and the corresponding frequency correction amount is 0Hz.

[0008] Furthermore, switching the compressor to operating mode A or B based on the difference includes: if the difference is less than a first threshold, then enabling mode A; otherwise, if the difference is greater than or equal to the first threshold, then enabling mode B.

[0009] Furthermore, during step 4, the damper angle and air speed are adjusted based on the difference between the coil temperature value and the indoor temperature value. If the difference is greater than or equal to a second threshold, the damper angle of the air conditioner is increased to increase the air speed; if the difference is less than the second threshold, the damper angle of the air conditioner is decreased to reduce the air speed.

[0010] The present invention employs the above-mentioned solution, the beneficial effects of which are that it judges based on outdoor temperature, indoor temperature, and coil temperature, and determines the corresponding initial operating frequency according to each temperature value to control the compressor to start high-temperature heating operation. It fully considers the difference between outdoor ambient temperature and indoor temperature, so that the air conditioner compressor starts running at a reasonable initial operating frequency, reducing the high pressure required for the air conditioner to operate in heating mode, and ensuring stable operation of the air conditioner in high-temperature cleaning mode. After starting high-temperature heating operation, it compares the coil temperature value and the indoor temperature value, and switches the compressor to operating mode A or B in real time according to the comparison result. It also adjusts the damper angle and wind speed in real time according to the comparison result to avoid the air conditioner outlet temperature being too high and improve the user's comfort. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the control board of an air conditioner in this embodiment.

[0012] Figure 2 This is a flowchart of an air conditioner control method under a high-temperature cleaning mode in this embodiment.

[0013] Figure 3 This is a schematic diagram showing the range of target frequencies corresponding to outdoor temperature values ​​in step 2.

[0014] Figure 4 This is a schematic diagram showing the range of frequency correction values ​​corresponding to the difference between the coil temperature value and the room temperature value in step 2.

[0015] Figure 5 This is a schematic diagram showing the range of switching modes A or B based on the difference between the coil temperature value and the room temperature value in step 4.

[0016] Among them, 1-electric control board, 2-outdoor sensor, 3-room temperature sensor, 4-pipe temperature sensor, 5-compressor, 6-stepper motor, 7-indoor motor, 8-electric auxiliary heating device. Detailed Implementation

[0017] To facilitate understanding of the present invention, a more complete description is given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0018] This invention relates to the cleaning and sterilization function of air conditioners. The cleaning and sterilization function of air conditioners is mainly achieved by running the heating mode to keep the air conditioner evaporator at a high temperature of about 58°C, thereby achieving high-temperature sterilization and cleaning and sterilizing the air conditioner.

[0019] The implementation details of the technical solutions in the embodiments of the present invention are described in detail below:

[0020] See attached document Figure 1 and 2As shown, in this embodiment, the air conditioner includes an outdoor sensor 2 and a compressor 5 installed in the outdoor unit, and a room temperature sensor 3, a pipe temperature sensor 4, a stepper motor 6, an indoor motor 7, an electric auxiliary heating device 8, an electronic control board 1, and a coil (not shown in the figure) installed in the indoor unit. The electronic control board 1 is a device with computing and processing functions. Through the electronic control board 1, the air conditioner control method in the high-temperature cleaning mode of this embodiment can be executed. The outdoor sensor 2, room temperature sensor 3, and pipe temperature sensor 4 can respectively acquire the outdoor temperature value, indoor temperature value, and coil temperature value in real time, and transmit these temperature values ​​to the electronic control board 1. The compressor 5 is the power core of the air conditioner's heat exchange, capable of receiving frequency signals emitted by the electronic control board 1 and providing the power required for heating operation based on these signals. The stepper motor 6 is used to adjust the air conditioner fan speed and can receive frequency signals emitted by the electronic control board 1. The electronic control board 1 sends a fan adjustment signal and adjusts the fan speed and air volume based on the signal; the indoor motor 7 is used to adjust the air conditioner damper angle, and can receive the damper adjustment signal sent by the electronic control board 1 and adjust the opening and closing angle of the damper based on the signal; the electric auxiliary heating device 8 can receive the signal to activate the electric auxiliary heating mode sent by the electronic control board 1 and provide the heat required for the air conditioner to heat. It should be noted that the electric auxiliary heating mode is a different heating mode from the heating mode of the air conditioner system through the compressor 5. The electric auxiliary heating mode is usually activated when the heating capacity of the air conditioner compressor 5 is insufficient, in order to ensure the overall heating efficiency of the air conditioner.

[0021] Based on the air conditioning system described above, the air conditioning control method in the high-temperature cleaning mode of this invention will be further explained below:

[0022] Step 1: After the air conditioner receives the signal to activate the high-temperature cleaning mode, it acquires the outdoor temperature, indoor temperature, and coil temperature in real time.

[0023] In this embodiment, the user sends a signal to activate the high-temperature cleaning mode of the air conditioner by pressing the cleaning and sterilization button on the remote control or the cleaning and sterilization function button on the mobile app. After receiving the signal, the air conditioner's internal control board 1 acquires the outdoor temperature, indoor temperature, and coil temperature values, wherein the coil temperature is preset to a range of 52~58℃.

[0024] Step 2: Determine the target frequency based on the outdoor temperature value, which is negatively correlated with the outdoor temperature value; determine the frequency correction amount based on the difference between the coil temperature value and the indoor temperature value, which is used to correct the operating frequency of compressor 5.

[0025] In this embodiment, refer to the appendix Figure 3As shown, the system program pre-establishes a correspondence between outdoor temperature values ​​and target frequencies. The outdoor temperature value and target frequency are set to a negative correlation; the higher the outdoor temperature value, the lower the target frequency is set. Specifically, seven temperature ranges are pre-defined based on the outdoor temperature value: Level 1 is -∞ to 8℃, corresponding to a target frequency of 80Hz; Level 2 is 9 to 13℃, corresponding to a target frequency of 70Hz; Level 3 is 14 to 17℃, corresponding to a target frequency of 60Hz; Level 4 is 18 to 25℃, corresponding to a target frequency of 50Hz; Level 5 is 26 to 29℃, corresponding to a target frequency of 40Hz; Level 6 is 30 to 34℃, corresponding to a target frequency of 30Hz; and Level 7 is 35 to ∞℃, corresponding to a target frequency of 0Hz. Then, the target frequency corresponding to the temperature range is determined based on the acquired outdoor temperature value. For example, if the acquired outdoor temperature value is -6℃, the corresponding target frequency is 80Hz. For example, if the outdoor temperature is 37℃, the corresponding target frequency is 0Hz.

[0026] In this embodiment, refer to the appendix Figure 4 As shown, the system program pre-establishes a second correspondence between the difference between the coil temperature and the room temperature and the frequency correction. Since the coil temperature is preset within the range of 52~58℃, the higher the room temperature, the smaller the difference between the coil temperature and the room temperature. Specifically, four levels of difference ranges are pre-defined: Level 1: 0~17, corresponding to a frequency correction of -15Hz; Level 2: 17~33, corresponding to a frequency correction of -10Hz; Level 3: 33~43, corresponding to a frequency correction of -5Hz; Level 4: 43~∞, corresponding to a frequency correction of 0Hz. Then, the difference between the obtained coil temperature and the room temperature is calculated, and the corresponding frequency correction is determined based on this difference. For example, if the obtained coil temperature is 58℃ and the room temperature is 10℃, the difference is 48, and the corresponding frequency correction is 0Hz. For example, if the obtained coil temperature is 52℃ and the room temperature is 36℃, the difference between the two is 16, and the corresponding frequency correction is -15Hz.

[0027] Step 3: Calculate the first sum between the target frequency and the frequency correction amount, and set the first sum as the initial operating frequency. The initial operating frequency is used to control the compressor 5 to start high-temperature heating operation. If the initial operating frequency value is negative, the electric auxiliary heating mode is turned on. In the electric auxiliary heating mode, the compressor 5 is in the off state.

[0028] In this embodiment, the initial operating frequency of compressor 5 = target frequency + frequency correction amount. This control method uses a frequency correction amount set based on the difference between the coil temperature and the indoor temperature to correct the initial operating frequency of the air conditioner. It fully considers the difference between the outdoor and indoor temperatures during air conditioner use, allowing the air conditioner compressor 5 to start high-temperature heating operation at a reasonable initial operating frequency. On the one hand, this avoids damage caused by excessively high initial operating frequency and excessive pressure during heating operation when the difference between the outdoor and indoor temperatures is small. On the other hand, when the difference between the outdoor and indoor temperatures is large, it allows the air conditioner compressor 5 to start high-temperature heating at a higher initial operating frequency, achieving efficient temperature rise. This ensures stable operation of the air conditioner in high-temperature cleaning mode.

[0029] For example, in a specific embodiment of the present invention, when the obtained outdoor temperature value is -6℃, the coil temperature value is 58℃, and the indoor temperature value is 10℃, the corresponding target frequency is 80Hz and the frequency correction amount is 0Hz. The initial operating frequency at this time is calculated to be 80Hz, so that the air conditioner compressor 5 starts high-temperature heating operation at the maximum initial operating frequency.

[0030] Furthermore, when the initial operating frequency value is negative, the compressor 5 is shut down for high-temperature heating, and the electric auxiliary heating mode is activated. It should be noted that when the initial operating frequency value is negative, it can be inferred that the difference between the outdoor ambient temperature and the indoor temperature is small. In this case, shutting down the compressor 5 and operating only through the electric auxiliary heating device 8 can reduce the high pressure required for the air conditioner to operate in heating mode, thus preventing the air conditioner from being damaged due to excessive pressure during heating operation at high temperatures.

[0031] For example, in another specific embodiment of the present invention, when the obtained outdoor temperature value is 37°C, the coil temperature value is 52°C, and the indoor temperature value is 36°C, the corresponding target frequency is 0Hz and the frequency correction is -15Hz. The initial operating frequency at this time is calculated to be -15Hz, which is a negative value. Therefore, the high-temperature heating operation of compressor 5 is turned off, and only the electric auxiliary heating mode is turned on.

[0032] Step 4: After compressor 5 starts high-temperature heating operation, monitor and obtain the operating frequency, coil temperature value and indoor temperature value of compressor 5 at equal time intervals. Calculate the difference between the coil temperature value and the indoor temperature value, and switch compressor 5 to operating mode A or B based on the difference. In operating mode A, the frequency correction value is negative, and the compressor 5 is adjusted accordingly based on the current operating frequency of compressor 5. In operating mode B, the frequency correction value is zero, and the compressor 5 is adjusted accordingly based on the current operating frequency of compressor 5.

[0033] In this embodiment, in operating mode A, when the frequency correction value is negative, the frequency correction can be divided into three levels: -5Hz, -10Hz, and -15Hz, based on the difference between the coil temperature value and the indoor temperature value. The smaller the difference between the coil temperature value and the indoor temperature value, the smaller the corresponding frequency correction value.

[0034] Further, refer to the appendix. Figure 5 As shown, the compressor 5 is switched to operating mode A or B based on the difference, specifically: if the difference is less than a first threshold, mode A is enabled; otherwise, if the difference is greater than or equal to the first threshold, mode B is enabled. The first threshold can be set to 43.

[0035] In this embodiment, since the operating frequency of compressor 5 at the next moment = the current operating frequency of compressor 5 + the frequency correction amount, as compressor 5 operates for heating, the difference between the coil temperature value and the indoor temperature value will become smaller and smaller, thereby reducing the operating frequency of compressor 5 at the next moment. The operating frequency of compressor 5 gradually decreases, so as to achieve efficient heating and stable operation of the air conditioner.

[0036] Furthermore, during step 4, the damper angle and airflow speed are adjusted based on the difference between the coil temperature and the indoor temperature. If the difference is greater than or equal to a second threshold, the damper angle is increased to raise the airflow speed; if the difference is less than the second threshold, the damper angle is decreased to lower the airflow speed. The second threshold can also be set to 43.

[0037] Step 5: During the heating process for the preset duration, repeat step 4 to maintain the coil temperature within the preset range.

[0038] In this embodiment, the preset duration is 30 minutes. By repeating step 4, the coil temperature can be maintained within the preset range of 52~58℃.

[0039] Step 6: After the high-temperature cleaning mode ends, turn off the air conditioner.

[0040] In this embodiment, after the high-temperature cleaning mode has been running for a preset time, the electronic control board 1 sends a signal to exit the cleaning mode. Upon receiving this signal, each device in the air conditioner gradually stops operating and exits the cleaning mode.

[0041] In summary, based on outdoor temperature, indoor temperature, and coil temperature, the system determines the initial operating frequency of compressor 5 to initiate high-temperature heating operation, ensuring that compressor 5 starts operating at a reasonable initial frequency. By comparing coil temperature and indoor temperature, and based on the comparison result, compressor 5 is switched to operating mode A or B in real time during high-temperature heating. This adjusts the operating frequency of compressor 5 according to the difference between the coil temperature and indoor temperature; as the difference decreases, the operating frequency of compressor 5 decreases, ensuring stable operation of the air conditioner. Furthermore, the system adjusts the damper angle and fan speed in real time based on the comparison results to improve the heating uniformity of the air conditioner, thereby enhancing user comfort.

[0042] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any modifications or variations made by those skilled in the art, without departing from the scope of the present invention, using the disclosed technical content, are equivalent embodiments of the present invention. Therefore, all equivalent changes made based on the concept of the present invention without departing from the scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for controlling an air conditioner in a high-temperature cleaning mode, the air conditioner comprising a coil and a compressor (5), characterized in that: The air conditioner control method includes the following steps: Step 1: After the air conditioner receives the signal to activate the high-temperature cleaning mode, it acquires the outdoor temperature and indoor temperature values ​​in real time. And the coil temperature value; Step 2: Determine the target frequency based on the outdoor temperature value, wherein the target frequency is negatively correlated with the outdoor temperature value; according to The difference between the coil temperature and the room temperature determines the frequency correction amount, which is used to correct the compressor. (5) Operating frequency; Step 3: Calculate the first sum between the target frequency and the frequency correction amount, and set the first sum as the initial value. The initial operating frequency is used to control the compressor (5) to start high-temperature heating operation; wherein, if the initial operating frequency is... If the initial operating frequency value is negative, then the electric auxiliary heating mode is activated. In the electric auxiliary heating mode, the compressor (5) is... Closed state; Step 4: After the compressor (5) starts high-temperature heating operation, monitor and obtain the compressor (5) data at equal time intervals. The operating frequency, the coil temperature value, and the room temperature value are used to calculate the time difference between one operation of the coil temperature value and the room temperature value. The difference, and based on the difference, switch the compressor (5) to operating mode A or B, wherein, in operating mode A Below, the frequency correction value is negative, based on the frequency correction value corresponding to the current compressor (5) operating frequency. Based on the adjustment; in the operating mode B, the frequency correction value is zero, based on the relative frequency correction value. The adjustment should be made based on the current operating frequency of the compressor (5); Step 5: During the heating process for the preset duration, repeat step 4 to maintain the coil temperature within the preset range. Encircle; Step 6: After the high-temperature cleaning mode ends, turn off the air conditioner.

2. The air conditioner control method in a high-temperature cleaning mode according to claim 1, characterized in that: According to the above The target frequency is determined by the outdoor temperature value, including: Seven temperature ranges are pre-defined based on the outdoor temperature value; Determine the target frequency corresponding to the temperature range to which the outdoor temperature value belongs, wherein the primary temperature range is -∞ to 8℃. The target frequency is 80Hz; the secondary temperature range is 9~13℃, corresponding to a target frequency of 70Hz; the tertiary temperature range... The temperature range is 14~17℃, corresponding to a target frequency of 60Hz; the fourth temperature range is 18~25℃, corresponding to a target frequency of 50Hz. Level 5 temperature range is 26~29℃, corresponding to a target frequency of 40Hz; Level 6 temperature range is 30~34℃, corresponding to... The target frequency is 30Hz; the temperature range for level seven is 35~∞℃, and the corresponding target frequency is 0Hz.

3. The air conditioner control method in a high-temperature cleaning mode according to claim 1, characterized in that: The frequency correction amount is determined based on the difference between the coil temperature value and the room temperature value, including: The four-level difference range is pre-defined; The difference between the obtained coil temperature value and the indoor temperature value is calculated. Determine the frequency correction amount corresponding to the range of the difference, wherein the first-level difference range is 0~17, and the corresponding frequency correction... The first-order difference is -15Hz; the second-order difference ranges from 17 to 33, corresponding to a frequency correction of -10Hz; the third-order difference ranges from 33 to 43. The corresponding frequency correction is -5Hz; the four-level difference range is 43~∞, and the corresponding frequency correction is 0Hz.

4. The air conditioner control method in a high-temperature cleaning mode according to claim 1, characterized in that: Based on the above The differential switching of the compressor (5) to operating mode A or B includes: If the difference is less than the first threshold, then mode A is enabled; Conversely, if the difference is greater than or equal to the first threshold, then mode B is enabled.

5. The air conditioner control method in a high-temperature cleaning mode according to claim 1, characterized in that: In step 4 During this period, it also includes adjusting the damper angle and airflow speed based on the difference between the coil temperature value and the indoor temperature value. If the difference is greater than or equal to the second threshold, the air conditioner damper angle is increased to improve the airflow speed; if the difference is less than the second threshold, This reduces the angle of the air conditioner's damper and lowers the airflow speed.

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