CN113154647B - Preheating control method for compressor - Google Patents

Abstract

The invention relates to the technical field of air conditioners, in particular to a preheating control method for a compressor. The invention aims to solve the problems of low control precision and high cost of the existing preheating method of the compressor. To this end, the warm-up control method of the present invention includes: acquiring regular types of the air conditioner used by a user, wherein the regular types comprise regular users and irregular users; when the regular type is regular user, selectively obtaining the predicted starting time of the air conditioner; determining the preheating starting time of the compressor based on the predicted starting time; preheating the compressor based on the preheating starting time; the rule type is determined based on a starting record of a first preset historical time period before the current date of the user. The compressor is preheated according to the rule that the user uses the air conditioner, the control method can improve the control accuracy of preheating the compressor, and preheating cost is saved.

Description

Compressor preheating control method

technical field

The invention relates to the technical field of air conditioning, in particular to a compressor preheating control method.

Background technique

When the air conditioner is running in winter, due to the characteristics of the refrigerating machine oil and refrigerant, when the outdoor ambient temperature is low, the refrigerating machine oil will solidify and the starting torque of the compressor will increase, resulting in excessive starting current or starting failure. Even if it starts normally, an effective oil film cannot be formed inside the compressor, resulting in serious wear and tear between parts. When the temperature is lower, the refrigerant migration will be placed at the bottom of the compressor, and the liquid refrigerant will be in the lower part of the refrigerator oil. When the compressor is started, the crankshaft pump will go up with liquid refrigerant instead of lubricating oil, resulting in no lubrication between the pump bodies. The compressor is prone to liquid shock and damage.

In the prior art, the above problems are mainly solved by preheating the compressor. For example, by setting an electric heating belt on the compressor shell, the refrigeration oil inside the compressor is heated by the electric heating belt; another example is by energizing the compressor to make the inner coil of the compressor heat to heat and heat the refrigeration oil, etc. However, in the current technical solution, the control logic of compressor preheating is relatively simple and rough. When the air conditioner is powered on, it is determined whether to turn on the compressor preheating function by judging the outdoor ambient temperature. This control method is easy. The waste of electric energy is not conducive to the improvement of the energy efficiency of the air conditioner.

Correspondingly, there is a need in the art for a new compressor preheating control method to solve the above problems.

Contents of the invention

In order to solve at least one of the above-mentioned problems in the prior art, that is, in order to solve the problems of low control accuracy and high cost in the existing compressor preheating method, the present invention provides a compressor preheating control method, the control Methods include:

When the outdoor ambient temperature is less than or equal to the preset temperature threshold, the regular type of the user's use of the air conditioner is obtained, wherein the regular type includes regular users and irregular users;

When the rule type is a regular user, selectively acquire the estimated start-up time of the air conditioner;

Determining the start time of preheating of the compressor based on the estimated starting time;

Preheating the compressor based on the preheating start time;

Wherein, the rule type is determined based on the user's power-on record in the first preset historical period before the current date.

In the preferred technical solution of the above compressor preheating control method, the rule type is determined in the following manner:

Based on the start-up record, count the number of start-up periods in which the historical start-up time of the air conditioner is located and the number of start-up days of the air conditioner in each start-up period;

judging the size of the number of boot periods and the preset number, and the size of the number of boot days and the preset number of days;

When the number of the power-on period is less than or equal to the preset number and at least one of the power-on days is greater than or equal to the preset number of days, determine that the user is the regular user;

Otherwise, determine that the user is the irregular user.

In the preferred technical solution of the above compressor preheating control method, after the step of "determining that the user is a regular user", the control method further includes:

calculating the mean value of all the historical power-on moments in each of the power-on periods;

Each of the mean values is determined as the estimated power-on time.

In the preferred technical solution of the above compressor preheating control method, the step of "selectively obtaining the estimated start-up time of the air conditioner when the regular type is a regular user" further includes:

When the regular type is a regular user, it is further judged whether the air conditioner is powered on within a second preset historical period before the current date;

If the air conditioner is turned on within the second preset historical period, obtaining the estimated start time of the air conditioner;

If the air conditioner has not been turned on within the second preset historical period, the estimated start time of the air conditioner is not acquired;

Wherein, the length of the second preset historical period is smaller than the length of the first preset historical period.

In the preferred technical solution of the above-mentioned compressor preheating control method, the step of "determining the start time of preheating of the compressor based on the estimated start-up time" further includes:

Determining the time corresponding to the first preset duration before the expected start-up time as the start time of preheating of the compressor.

In the preferred technical solution of the above compressor preheating control method, the control method also includes:

When the regular type is an irregular user, or the air conditioner is not powered on within the second preset historical period, the compressor is preheated after receiving a power-on signal;

When the preheating duration of the compressor reaches a second preset duration, the compressor is controlled to start running.

In the preferred technical solution of the above compressor preheating control method, the step of "preheating the compressor" further includes:

Determine the preheating power based on the outdoor ambient temperature;

A coil controlling the compressor is energized and operated at the preheating power.

In the preferred technical solution of the above compressor preheating control method, after the step of "controlling the coil of the compressor to operate at the preheating power", the control method further includes:

Obtain the winding temperature of the coil;

Judging the size of the winding temperature and the winding temperature threshold;

When the coil temperature is greater than or equal to the coil temperature threshold, the coil is controlled to stop energizing until the coil temperature drops to a restart temperature or the coil is de-energized for a third preset time.

In the preferred technical solution of the above compressor preheating control method, after the step of "preheating the compressor", the control method further includes:

judging whether the air conditioner is activated;

When the air conditioner is started, record the current starting time of the air conditioner;

The rule type is updated based on the current power-on time.

In the preferred technical solution of the above compressor preheating control method, at least the determination and update of the rule type and the determination of the estimated start-up time are completed by a server connected to the air conditioner.

Those skilled in the art can understand that, in the preferred technical solution of the present invention, the compressor preheating control method includes: when the outdoor ambient temperature is less than or equal to the preset temperature threshold, acquiring the pattern of the user's use of the air conditioner, where the pattern The types include regular users and irregular users; when the regular type is regular users, selectively obtain the estimated start-up time of the air conditioner; based on the estimated start-up time, determine the preheating start time of the compressor; based on the preheating start time, Preheating the compressor; wherein, the rule type is determined based on the user's power-on record in the first preset historical period before the current date.

By preheating the compressor based on the user's use of the air conditioner when the outdoor ambient temperature is less than or equal to the preset temperature threshold, the control method of the present application can improve the control accuracy of the compressor preheating and save the preheating cost. Specifically, by determining the user's regularity of using the air conditioner based on the user's power-on record of the first preset historical period before the current date, it can accurately reflect the user's air conditioner use law and habits in the latest period, so that according to the user's usage habits To control the compressor to preheat in a targeted manner. Compared with the technical solution in the prior art that only judges whether to preheat by the outdoor ambient temperature, it can greatly improve the preheating accuracy and reduce unnecessary energy waste. Once Preheating the compressor can accurately respond to the user's air-conditioning needs and improve the user's experience.

Furthermore, by determining the user's usage pattern based on the number of power-on periods in which the historical power-on time in the power-on records is located and the number of days of power-on in each power-on period, the control method of the present application can also effectively distinguish the user's use of the air conditioner based on the power-on records. Whether it is regular, so as to preheat the compressor in advance based on the user's usage regularity.

Furthermore, by using the average value of multiple historical power-on times in each power-on period as the estimated power-on time, it can better reflect the user's power-on law in this period, so as to preheat the compressor in advance to ensure the effect of preheating and energy saving balance.

Furthermore, by further judging whether the air conditioner was turned on within the second preset historical period, it can reflect whether the user has turned on the air conditioner in recent days, so as to preheat the compressor when using the air conditioner in recent days to prevent compressor damage ; and when the air conditioner is not used in recent days, the compressor will not be preheated to reduce energy loss.

Further, when the user uses the air conditioner irregularly, or the air conditioner has not been turned on within the second preset historical period, the compressor is preheated only when the start signal is received, which can prevent the user from being able to accurately estimate the start time of the user. resulting in wasted energy.

Further, by determining the preheating power based on the outdoor ambient temperature, and then controlling the coil of the compressor to be energized and operated at the preheating power, the application can also adjust the power of the compressor coil based on the outdoor temperature, improve the preheating efficiency, and avoid energy waste .

Furthermore, by judging the coil temperature and the coil temperature threshold, the power supply to the coil is stopped when the coil temperature is too high, which can prevent the coil of the compressor from overheating and effectively protect the compressor.

Furthermore, by judging whether the air conditioner is started after the compressor is preheated, and recording the current start-up time and updating the rule type when the air conditioner is started, the control method of the present application can also realize real-time update of user habits, thereby improving the prediction of start-up time Accuracy ensures user experience.

Furthermore, by using the server to realize the determination and update of the rule type and the determination of the expected start-up time, the application can also reduce the purchase cost of the user and increase the calculation speed of the method.

Description of drawings

The compressor preheating control method of the present invention will be described below with reference to the accompanying drawings. In the attached picture:

Fig. 1 is the flowchart of compressor preheating control method of the present invention;

Fig. 2 is a system diagram of the air conditioning system of the present invention;

Fig. 3 is a logic diagram of the compressor preheating control method of the present invention.

Detailed ways

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention. For example, although the various steps are described in order in the following embodiments, those skilled in the art can understand that in order to achieve the effect of this embodiment, different steps do not have to be executed in this order, which can Simultaneous (parallel) execution or execution in reverse order, these simple variations are within the scope of the invention.

As mentioned in the background technology, the current compressor preheating logic is relatively simple and rude. As long as the air conditioner is powered on, the compressor will be preheated based on the outdoor ambient temperature. This is a great waste of electric energy. implementation of emissions reductions. For this reason, the present application provides a compressor preheating control method, by preheating the compressor based on the rules of the user's use of the air conditioner, which can improve the control accuracy of the compressor preheating and save the preheating cost.

Firstly, referring to Fig. 1 and Fig. 2, the compressor preheating control method of the present invention will be described. Among them, FIG. 1 is a flow chart of the compressor preheating control method of the present invention; FIG. 2 is a system diagram of the air conditioning system of the present invention.

Referring first to FIG. 2 , the air conditioning system of the present invention includes an air conditioner and a server, and the air conditioner is capable of communicating with the server. Preferably, the air conditioner can perform two-way communication with the server through communication methods such as wide area network, local area network, WiFi, 3G/4G/5G. For example, the air conditioner uploads the obtained parameters to the server, and the server sends control instructions and data to the air conditioner. The above-mentioned communication mode and interaction mode are relatively common in the field, and will not be repeated here.

Among them, there is a learning module built into the server. This learning module can summarize the user's habit of using the air conditioner based on the uploaded boot records of the air conditioner for a period of time, and then analyze the results to determine the regular type of the user's use of the air conditioner, and when the regular type is valid. For regular users, determine the user's expected start-up time, and then send the regular type and expected start-up time to the air conditioner, so that the air conditioner can control the compressor to preheat based on the received data. Among them, the specific analysis process will be introduced in the following methods.

Next, referring to FIG. 1 , the compressor preheating control method of the present application will be introduced.

As shown in Figure 1, in order to solve the problems of low control precision and high cost in the existing compressor preheating method, the compressor preheating control method of the present application mainly includes:

S101. When the outdoor ambient temperature is less than or equal to the preset temperature threshold, obtain the pattern of the user's use of the air conditioner; for example, the preset temperature threshold can be 10°C, and the air conditioner can obtain the outdoor ambient temperature based on a temperature sensor, or the server can publish it based on the network The local weather forecast to obtain the outdoor ambient temperature; when the outdoor ambient temperature is less than or equal to the preset temperature threshold, the refrigerating machine oil in the compressor is likely to solidify, causing the compressor to fail to start normally. The compressor is selectively preheated based on the type of law. The rule type specifically includes regular users and irregular users. The rule type is determined based on the user's power-on record in the first preset historical period before the current date, such as based on the user's power-on record two weeks before the current date. For example, when the air conditioner is turned on, it records the start-up time and uploads the start-up time to the server. The server analyzes and determines whether the user uses the air conditioner regularly through the collected two-week start-up records. If there is a certain pattern, it is determined as a regular user. , otherwise it is determined as an irregular user.

Of course, the above-mentioned preset temperature threshold is not static, and its specific setting is related to the model of the compressor and the type of refrigerating machine oil used, and can be adjusted by those skilled in the art.

S103. When the regular type is a regular user, selectively obtain the estimated start-up time of the air conditioner; for example, when the regular type is a regular user, it is proved that the user has formed a certain usage habit of using the air conditioner in the last two weeks. At this time Based on the usage habit analysis, the user's expected power-on time can be obtained, so as to determine the user's possible power-on time.

S105. Determine the start time of preheating of the compressor based on the expected start time; for example, after determining the expected start time, determine a certain time point before the expected start time as the preheat start time.

S107. Preheat the compressor based on the start time of preheating; for example, when the current time reaches the start time of preheating, start to preheat the compressor; the preheating method can be preheating by electric heating belt or preheating by energizing the coil of the compressor .

By preheating the compressor based on the user's use of the air conditioner when the outdoor ambient temperature is less than or equal to the preset temperature threshold, the control method of the present application can improve the control accuracy of the compressor preheating and save the preheating cost. Specifically, by determining the user's regularity of using the air conditioner based on the user's power-on record of the first preset historical period before the current date, it can accurately reflect the user's air conditioner use law and habits in the latest period, so that according to the user's usage habits To control the compressor to preheat in a targeted manner. Compared with the technical solution in the prior art that only judges whether to preheat by the outdoor ambient temperature, it can greatly improve the preheating accuracy and reduce unnecessary energy waste. Once Preheating the compressor can accurately respond to the user's air-conditioning needs and improve the user's experience.

The compressor preheating control method of the present application will be described in detail below.

In a possible implementation manner, the user's regularity of using the air conditioner is determined in the following manner:

Based on the power-on record of the user in the first preset historical period before the current date, count the number of power-on periods in which the historical power-on time of the air conditioner is located and the number of days the air conditioner is powered on in each power-on period; Set the size of the number, and the size of the number of boot days and the preset number of days; when the number of boot periods is less than or equal to the preset number and at least one boot day is greater than or equal to the preset number of days, determine that the user is a regular user; otherwise, determine that the user is none Regular users.

For example, see Table 1. Table 1 shows the start-up records of the air conditioner in the past two weeks. The records can be acquired by the air conditioner and uploaded to the server for subsequent analysis and judgment. It can be seen from Table 1 that the air conditioner has a start-up record from February 18, 2019 to February 23, 2019, and its historical start-up time is distributed in multiple time periods. In this application, the start-up time period refers to the hour interval in which the historical start-up time is located . For example, the historical power-on time in Table 1 below is 07:12:12, then the power-on period of the historical power-on time is 7:00, and then the historical power-on time in Table 1 is 20:12:12 and 20:54:13 The start-up time at all places is 20:00.

Table 1 Start-up records of air conditioners in the past two weeks date Historical boot time date Historical boot time 2019/02/23 07:12:12 2019/02/18 19:16:10 2019/02/22 06:54:13 2019/02/23 20:12:12 2019/02/21 06:31:13 2019/02/22 20:54:13 2019/02/20 06:46:13 2019/02/21 20:31:13 2019/02/23 16:12:12 2019/02/20 20:46:13 2019/02/22 18:39:13 2019/02/19 20:39:13 2019/02/21 18:54:13 2019/02/18 20:16:10 2019/02/20 18:46:13 2019/02/18 20:32:10 2019/02/19 19:31:13

Referring next to Table 2, Table 2 shows the comparison relationship between the start-up period and the expected start-up time determined after the start-up records in Table 1 are counted and calculated. According to the corresponding relationship between the historical power-on time and the power-on time period, the number of power-on time periods in which the historical power-on time of the air conditioner is located and the number of days that the air conditioner is powered on in each power-on time period can be obtained through statistics. As can be seen from Table 2, there are 6 power-on periods in which the user's historical power-on time in the past two weeks is 6 o'clock, 7 o'clock, 16 o'clock, 18 o'clock, 19 o'clock, and 20 o'clock. They are: 3 days at 6:00, 1 day at 7:00, 1 day at 16:00, 3 days at 18:00, 2 days at 19:00, and 6 days at 20:00. Among them, in the statistical process, if there are multiple historical power-on time records in the same power-on period of the same day, then the multiple historical power-on times are classified as one day, such as 20:16 and 20:32 in Table 2, two historical power-on times All time belongs to the start-up period at 20:00 on February 18.

Table 2 Comparison table between start-up period and expected start-up time

After obtaining the number of boot periods in the historical boot time and the number of boot days of each boot period, the server further judges the number of boot periods and the preset number, as well as the size of the boot days and the preset days; in this application, The preset number can be 6, and the preset number of days can be 4. It can be seen from Table 2 that in the past two weeks, the number of the user's power-on time period is equal to 6, and the user's power-on time during the power-on time period at 20 o'clock is 6 days, which is greater than the preset The number of days is 4 days, so it can be determined that the user is a regular user, that is to say, the user used the air conditioner more intensively in the past two weeks, and used the air conditioner more regularly during the period of at least 20:00. Otherwise, if any of the above two judging conditions is not satisfied, it is determined that the user is an irregular user, that is, the user has not used the air conditioner intensively in the past two weeks, and/or used the air conditioner in each usage period The number of times is not many, and it is impossible to accurately learn the user's usage habits.

Of course, the setting methods of the above-mentioned first preset historical period, preset number and preset days are only exemplary, and those skilled in the art can adjust them based on actual application scenarios, and this adjustment does not deviate from the principle of the present application . For example, the first preset historical period can also be one week, one month, half a year, etc., the preset number can also be 3, 5, 7, 8, etc., and the preset number of days can also be 6, 8, 9, etc.

Further, in order to make the judgment result more accurately reflect the user's usage habits, those skilled in the art can also fine-tune the above judgment rules on the premise that the above principles remain unchanged. After the power-on period, the above-mentioned rule type is judged.

By determining the usage pattern of the user based on the number of power-on periods in which the historical power-on time in the power-on records is located and the number of days of power-on in each power-on period, the control method of the present application can also effectively distinguish whether the user uses the air conditioner regularly based on the power-on records, In order to preheat the compressor in advance based on the user's usage pattern when there is a regularity.

In a possible implementation manner, after the step of "determining that the user is a regular user", the control method further includes:

Calculate the mean value of all historical power-on times in each power-on period; determine each mean value as an expected power-on time. For example, still referring to Table 2, after the server determines that the user's regular use of the air conditioner is a regular user, the server can further calculate the average value of the historical power-on time for each power-on period as the expected power-on time of the power-on period. time.

Of course, calculating the average value is only an example, and those skilled in the art can also use other calculation methods to calculate the expected start-up time, for example, using a weighted average method for dividing intervals of multiple historical start-up times.

Of course, in order to improve the control accuracy, those skilled in the art can also fine-tune the determination rules of the above-mentioned estimated start-up time on the premise that the above-mentioned principles remain unchanged. Calculate the benchmark for the expected start-up time, and exclude the start-up time periods with the start-up time less than 3 days. That is to say, the power-on time period with the number of power-on days greater than or equal to 3 days is regarded as the time period in which the user has formed a regular pattern, and the power-on time period with the power-on time of less than 3 days is not considered due to the small number.

By using the average value of multiple historical start-up times in each start-up period as the estimated start-up time, it can better reflect the user's start-up rule in this period, so as to preheat the compressor in advance to ensure the balance between the preheating effect and the energy-saving effect.

In a possible implementation manner, the above step S103 further includes:

When the regular type is a regular user, it is further judged whether the air conditioner is turned on within the second preset historical period before the current date; if the air conditioner is turned on within the second preset historical period, then the estimated Start-up time; if the air conditioner is not turned on within the second preset historical period, the estimated start-up time of the air conditioner is not acquired; in this application, the length of the second preset historical period is less than the length of the first preset historical period.

For example, the second preset historical period may be one week, that is, after using the boot records of the last two weeks to determine that the regular type of the user is a regular user, the server further uses the boot records of the last week to determine whether the user has a boot record , if yes, it proves that the user is still using the air conditioner regularly in the last week. At this time, the estimated start time of the air conditioner can be obtained, and the compressor can be preheated based on the preheating start time determined based on the estimated start time; if not, prove The user may not have used the air conditioner in the last week due to going out, rising indoor temperature, etc. At this time, it is not necessary to obtain the estimated start time, that is, not to preheat the compressor in advance.

Of course, the above-mentioned specific value of the second preset historical period is only used to illustrate the principle of the present application, and it is not static. Those skilled in the art can adjust it under the premise that it is smaller than the first preset historical period. For example, the second preset historical period may also be 3 days, 5 days, 10 days and so on.

By further judging whether the air conditioner is turned on within the second preset historical period, it can be reflected whether the user has started the air conditioner in the last few days, thereby preheating the compressor when using the air conditioner in the last few days, and preventing the compressor from being damaged; When the air conditioner is not used in recent days, the compressor will not be preheated to reduce energy consumption.

In a possible implementation manner, the above step S105 further includes:

The time corresponding to the first preset duration before each expected start-up time is determined as the start time of compressor preheating. For example, the first preset duration may be 1 hour, that is to say, after determining multiple expected start-up times, the time point corresponding to 1 hour before each expected start-up time is taken as the start time of compressor preheating .

In a possible implementation manner, the compressor preheating control method further includes:

When the regular type is an irregular user, or the air conditioner has not been turned on within the second preset historical period, the compressor will be preheated after receiving the start signal; when the preheating time of the compressor reaches the second preset When the time is long, control the compressor to start running.

For example, the second preset duration can be 10 minutes. When the user's regularity type is an irregular user, it proves that the user has no special regularity in using the air conditioner. At this time, it is easy to preheat the compressor according to the user's historical power-on time of the air conditioner. This results in a waste of energy; and if the air conditioner is not turned on within the second preset historical period, it proves that the user has no habit of turning on the air conditioner in the recent period, and it is not suitable to preheat the compressor. At this time, it is judged whether a start-up signal is received, and the compressor is preheated only after the start-up signal is received. And when the preheating time of the compressor reaches 10 minutes, stop the preheating and start the compressor to make the air conditioner run normally.

When the user uses the air conditioner irregularly or the air conditioner has not been turned on within the second preset historical period, the compressor is preheated only when the start signal is received, which can prevent the user from being able to accurately estimate the start time of the user. of energy waste.

In a possible implementation manner, the step of "preheating the compressor" further includes:

Based on the outdoor ambient temperature, the preheating power is determined; the coils of the control compressor are energized and run at the preheating power.

For example, whether the preheating is performed based on the start time of the preheating, or the preheating is performed after receiving a power-on command, it can be performed by controlling the energization of the coil of the compressor. The specific principle of preheating the refrigerating machine oil by energizing the compressor coil belongs to conventional technical means in the art, and will not be repeated here. Further, before turning on the power, the preheating power is determined based on the outdoor ambient temperature. For example, taking preheating after receiving a power-on command as an example, the preheating power can be determined by the following formula (1):

W=k×T _ao +b (1)

In formula (1), W is the preheating power, T _ao is the outdoor ambient temperature, and k and b are coefficients. Among them, k and b can be obtained by fitting based on experimental data. For example, multiple heating experiments were performed on the compressor for different outdoor ambient temperatures. In many experiments, the energizing power of the compressor was set so that the fluidity of the refrigerating machine oil in the compressor reached a better level within 10 minutes. At this time, the energizing power of the compressor at each outdoor ambient temperature was recorded respectively, so as to establish a preset The linear relationship between thermal power and outdoor ambient temperature, based on the linear relationship to determine the coefficients k, b.

Of course, the determination of the preheating power may also be based on other relationships between the outdoor ambient temperature and the preheating power, such as based on a fixed correspondence between the outdoor ambient temperature and the preheating power. For example, a comparison table of the relationship between the outdoor environment temperature and the preheating power is determined based on the test, and the comparison table is stored in the air conditioner, and the preheating power corresponding to the outdoor environment temperature can be determined by using the comparison table.

Of course, the preheating power when regular users perform preheating is similar to the above determination method, and will not be repeated here.

By determining the preheating power based on the outdoor ambient temperature, and then controlling the energization of the coil of the compressor to run at the preheating power, the application can also adjust the energizing power of the compressor coil based on the outdoor temperature to improve the preheating efficiency and avoid energy waste.

In a possible implementation manner, after the step of "controlling the coil of the compressor to operate at the preheating power", the control method further includes:

Obtain the winding temperature of the coil; judge the winding temperature and the winding temperature threshold; when the winding temperature is greater than or equal to the winding temperature threshold, control the coil to stop energizing until the winding temperature drops to the restart temperature or the coil stops energizing The duration reaches the third preset duration.

For example, during the preheating process of the compressor, since the compressor coil is energized for preheating, the compressor coil has the risk of being damaged by heating up to the limit value. At this time, the winding temperature of the coil is obtained through the temperature sensor And judge the winding temperature and the winding temperature threshold, when the winding temperature is greater than the winding temperature threshold, control the coil to stop energizing, and continuously monitor the winding temperature of the coil or the accumulated power-off time, when the winding temperature drops to When the start-up temperature or the time period during which the coil is not energized reaches a third preset time period, the coil is energized again. So cycle. Wherein the winding temperature threshold can be the upper limit of the winding temperature, or a certain temperature value close to the upper limit, the determination of the temperature value is related to the material grade of the coil, and those skilled in the art can determine the temperature based on the material grade of the coil It is specifically determined, and this application does not limit it.

By judging the winding temperature and the winding temperature threshold value, the power supply to the coil is stopped when the winding temperature is too high, which can prevent the coil of the compressor from overheating and effectively protect the compressor.

In a possible implementation manner, the control method also includes:

Determine whether the air conditioner is started; when the air conditioner is started, record the current start time of the air conditioner; based on the current start time, update the rule type.

For example, when the air conditioner is started, the air conditioner automatically records the current start-up time and uploads the time to the server, and the server updates the rule type according to the above-mentioned rule type determination steps based on the current start-up time.

By judging whether the air conditioner is started after the compressor is preheated, and recording the current start-up time and updating the rule type when the air conditioner is started, the control method of the present application can also realize real-time update of user habits, thereby improving the prediction accuracy of the start-up time, Ensure user experience.

In a possible implementation manner, at least the determination of the regular type, the update, and the determination of the expected start-up time are completed by a server connected to the air conditioner. For example, the server determines and updates the rule type based on the start-up record uploaded by the air conditioner, and when the rule type is a regular user, determines the expected start-up time based on the rule type, and sends the rule type and expected start-up time to the air conditioner device.

By using the server to realize the determination and update of the rule type and the determination of the expected starting time, the application can also reduce the purchase cost of the user and improve the calculation speed of the method.

It should be noted that although the detailed steps of the method of the present invention have been described in detail above, those skilled in the art can combine, split and change the order of the above steps without departing from the basic principles of the present invention, such The modified technical solution does not change the basic idea of the present invention, so it also falls within the protection scope of the present invention.

A possible implementation process of the present application will be described below with reference to FIG. 3 . Wherein, FIG. 3 is a logic diagram of the compressor preheating control method of the present invention.

As shown in Figure 3, in a possible implementation process, step S201 is first performed, the air conditioner obtains the outdoor ambient temperature and makes a judgment, and when the outdoor ambient temperature T _ao ≤ 10°C, obtains the rule type of the user;

After acquiring the regularity type of the user, step S203 is executed to determine whether the regularity type of the user's use of the air conditioner is a regular user; if yes, then step S205 is executed; otherwise, step S223 is executed.

S205, determine whether the user has turned on the air conditioner in the last week; if yes, execute step S207, otherwise execute step S223.

S207. Obtain the expected power-on time t _n , and then perform step S209.

S209. Calculate the preheating start time t _s =t _n -1(h) based on the expected start-up time t _n , and calculate the coil preheating power W=k×T _ao +b based on the outdoor ambient temperature T _ao .

After calculating the preheating start time and preheating power, execute step S211 to judge whether the current time reaches the preheating start time t _s , if so, execute step S213, otherwise return to continue to execute step S211, and repeatedly judge whether the current time reaches the preset time Hot start moment.

S213, controlling the coil of the compressor to be energized according to the preheating power W to preheat the compressor.

During the preheating process of the compressor, step S215 is executed to determine whether a power-on signal is received, if yes, step S217 is executed, otherwise step S219 is executed.

S217, the compressor is controlled to start, and the air conditioner operates normally.

S219, further judging whether the winding temperature T _i of the coil is less than the winding temperature threshold c, that is, whether T _i < c holds true; if true, return to step S213, otherwise execute step S221.

S221, control the coil of the compressor to stop energizing, and return to step S219.

S223, judging whether a power-on signal is received, if yes, then execute step S225, otherwise end the program;

S225. Calculate the coil preheating power W=k×T _ao +b based on the outdoor ambient temperature T _ao , and then control the coil of the compressor to be energized according to the preheating power W to preheat the compressor.

During the compressor preheating process, execute step S227 to determine whether the preheating time t is greater than or equal to the second preset duration of 10 minutes, that is, t≥10 minutes; if yes, execute step S229, otherwise return to step S225.

S229, the compressor is controlled to start, and the air conditioner operates normally.

Finally, it should be noted that although the specific implementation of the above compressor preheating control method is introduced by communicating with the server and the air conditioner and executing some steps respectively, this is not intended to limit the scope of protection of this application. In other ways One, more, or even all of the steps performed by the server in the above control method may be implemented by the air conditioner. Of course, one or more steps in the above steps of the control method performed by the air conditioner can also be implemented by the server, and the present application does not make any restrictions on this, as long as the above control of the present application can be realized through the air conditioner or the combination of the air conditioner and the server method.

For example, all the control steps in this application can be performed independently by the air conditioner; for another example, in this application, in addition to the determination and update of the regular type and the determination of the estimated start-up time, the regular type of the user's use of the air conditioner, the estimated The steps of turning on the time, determining the start time of preheating, judging whether the air conditioner is turned on during the second preset historical period, and determining the preheating power based on the outdoor ambient temperature can also be performed by the server.

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but those skilled in the art will easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims (8)

1. A compressor preheating control method, is characterized in that, said control method comprises: When the outdoor ambient temperature is less than or equal to the preset temperature threshold, the regular type of the user's use of the air conditioner is obtained, wherein the regular type includes regular users and irregular users; When the rule type is a regular user, selectively acquire the estimated start-up time of the air conditioner; Determining the start time of preheating of the compressor based on the estimated starting time; Preheating the compressor based on the preheating start time; Wherein, the rule type is determined based on the user's power-on record of the first preset historical period before the current date; The rule type is determined by: Based on the start-up record, count the number of start-up periods in which the historical start-up time of the air conditioner is located and the number of start-up days of the air conditioner in each start-up period; judging the size of the number of boot periods and the preset number, and the size of the number of boot days and the preset number of days; When the number of the power-on period is less than or equal to the preset number and at least one of the power-on days is greater than or equal to the preset number of days, determine that the user is the regular user; Otherwise, determine that the user is the irregular user; The step of "selectively obtaining the estimated start-up time of the air conditioner when the regular type is a regular user" further includes: When the regular type is a regular user, it is further judged whether the air conditioner is powered on within a second preset historical period before the current date; If the air conditioner is turned on within the second preset historical period, obtaining the estimated start time of the air conditioner; If the air conditioner has not been turned on within the second preset historical period, the estimated start time of the air conditioner is not acquired; Wherein, the length of the second preset historical period is smaller than the length of the first preset historical period. 2. The compressor preheating control method according to claim 1, characterized in that, after the step of "determining that the user is a regular user", the control method further comprises: calculating the mean value of all the historical power-on moments in each of the power-on periods; Each of the mean values is determined as the estimated power-on time. 3. The compressor preheating control method according to claim 1, characterized in that the step of "determining the start time of preheating of the compressor based on the estimated start time" further comprises: Determining the time corresponding to the first preset duration before the expected start-up time as the start time of preheating of the compressor. 4. The compressor preheating control method according to claim 1, wherein the control method further comprises: When the regular type is an irregular user, or the air conditioner is not powered on within the second preset historical period, the compressor is preheated after receiving a power-on signal; When the preheating duration of the compressor reaches a second preset duration, the compressor is controlled to start running. 5. The compressor preheating control method according to claim 1 or 4, wherein the step of "preheating the compressor" further comprises: Determine the preheating power based on the outdoor ambient temperature; A coil controlling the compressor is energized and operated at the preheating power. 6. The compressor preheating control method according to claim 5, characterized in that, after the step of "controlling the coil of the compressor to operate at the preheating power", the control method further comprises: Obtain the winding temperature of the coil; Judging the size of the winding temperature and the winding temperature threshold; When the coil temperature is greater than or equal to the coil temperature threshold, the coil is controlled to stop energizing until the coil temperature drops to a restart temperature or the coil stop power reaches a third preset time length. 7. The compressor preheating control method according to claim 1, characterized in that, after the step of "preheating the compressor", the control method further comprises: judging whether the air conditioner is activated; When the air conditioner is started, record the current starting time of the air conditioner; The rule type is updated based on the current power-on time. 8 . The compressor preheating control method according to claim 7 , wherein at least the determination and update of the rule type and the determination of the expected start-up time are completed by a server connected to the air conditioner.

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