Air conditioning apparatus

Abstract

The application discloses air conditioning equipment, in sleep mode, the indoor temperature is obtained, the indoor temperature change rate is calculated, the change rate influence factor is calculated based on the indoor temperature change rate; based on the initial hysteresis temperature and the change rate influence factor, the dynamic hysteresis temperature is calculated; based on the set temperature and the dynamic hysteresis temperature, the compressor start temperature and the compressor stop temperature are calculated; then based on the compressor start temperature and the compressor stop temperature, the compressor is started and stopped control. Therefore, the air conditioning equipment of the application adjusts the dynamic hysteresis temperature according to the indoor temperature change trend, and then adjusts the compressor start temperature and the compressor stop temperature, avoids the frequent start and stop of the compressor, improves the user experience, and solves the technical problem of the compressor frequency start and stop in the prior art.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to air conditioning equipment. Background Technology

[0002] Parking air conditioners have become an essential item for heavy truck drivers to cool down in the summer. To save money, most drivers choose to sleep with the parking air conditioner on in their vehicles at night. Therefore, the stable, low-noise operation of the parking air conditioner at night is crucial for drivers to get a good night's sleep. Currently, parking air conditioner control is generally based on fixed hysteresis control or simple delay control.

[0003] Fixed hysteresis control: A fixed temperature hysteresis loop is used (e.g., set temperature 25°C, start temperature 26°C, stop temperature 24°C). In sleep mode, the small passenger compartment, relatively poor insulation, and relatively stable heat dissipation from the human body, but fluctuations in ambient temperature (such as cooling at night and warming at sunrise) or small disturbances (such as turning over or opening / closing doors) can easily cause the temperature to rapidly oscillate around the edge of the hysteresis loop, triggering frequent compressor start-stop cycles.

[0004] Simple delay control: The compressor is forced to delay for a period of time after it stops before being allowed to start. Although this reduces the number of start-stop cycles, it may cause the compressor to start only after the temperature has deviated too much from the comfort range (too cold or too hot), affecting comfort, and it is also slow to respond when the temperature changes rapidly.

[0005] Current air conditioning technology cannot achieve stable operation of the air conditioner compressor at ultra-low frequency while maintaining a constant indoor temperature that meets the set temperature. Summary of the Invention

[0006] This invention proposes an air conditioning device that solves the technical problem of compressor frequency start-stop in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This invention provides an air conditioning device, comprising:

[0009] The control module is configured as follows:

[0010] In sleep mode, calculate the rate of change of indoor temperature; and based on the rate of change of indoor temperature, calculate the rate of change influence factor;

[0011] Obtain the initial hysteresis temperature; and calculate the dynamic hysteresis temperature based on the initial hysteresis temperature and the rate of change influence factor.

[0012] Obtain the set temperature; and calculate the compressor start-up temperature and compressor stop temperature based on the set temperature and the dynamic hysteresis temperature;

[0013] The compressor is controlled based on its start-up temperature and shutdown temperature.

[0014] In some embodiments of this application, the rate of change influence factor is calculated based on the indoor temperature change rate, specifically including:

[0015] The product of the absolute value of the indoor temperature change rate and the first set coefficient is calculated to obtain the change rate influence factor; wherein, the first set coefficient is a positive number.

[0016] In some embodiments of this application, the dynamic hysteresis temperature is calculated based on the initial hysteresis temperature and the rate of change influence factor, specifically including:

[0017] The dynamic hysteresis temperature is obtained by summing the initial hysteresis temperature and the rate of change influence factor.

[0018] In some embodiments of this application, the compressor start-up temperature and compressor shutdown temperature are calculated based on the set temperature and the dynamic hysteresis temperature, specifically including:

[0019] In cooling sleep mode

[0020] The compressor start-up temperature is obtained by calculating the sum of the set temperature and the dynamic hysteresis temperature.

[0021] The compressor shutdown temperature is obtained by calculating the difference between the set temperature and the dynamic hysteresis temperature.

[0022] In some embodiments of this application, the compressor start-up temperature and compressor shutdown temperature are calculated based on the set temperature and the dynamic hysteresis temperature, specifically including:

[0023] In heating sleep mode

[0024] The compressor start-up temperature is obtained by calculating the difference between the set temperature and the dynamic hysteresis temperature.

[0025] The compressor shutdown temperature is obtained by calculating the sum of the set temperature and the dynamic hysteresis temperature.

[0026] In some embodiments of this application, the control module is further configured as follows:

[0027] In sleep mode, the indoor temperature change rate, change rate influence factor, dynamic hysteresis temperature, compressor start temperature and compressor stop temperature are calculated every first set time interval.

[0028] In some embodiments of this application, the indoor temperature change rate is the average indoor temperature change rate over the most recent first set time period.

[0029] In some embodiments of this application, the control module is further configured as follows:

[0030] Calculate the rate of change of indoor temperature at the moment the compressor stops, and calculate the predicted hibernation time based on the rate of change of indoor temperature at the moment of shutdown;

[0031] The larger value between the set base sleep time and the predicted sleep time will be used as the intelligent minimum sleep time.

[0032] When the compressor's shutdown time reaches the intelligent minimum sleep time, it is then determined whether the indoor temperature has reached the compressor's start-up temperature.

[0033] In some embodiments of this application, the predicted hibernation time is calculated based on the rate of change of indoor temperature at the time of shutdown, specifically including:

[0034] In cooling sleep mode, determine whether the rate of change of indoor temperature at the time of shutdown is negative;

[0035] If so, the predicted hibernation time is the product of the absolute value of the rate of change of indoor temperature at the time of shutdown and the second set coefficient; where the second set coefficient is a positive number.

[0036] If not, the predicted sleep time is 0 or a preset low value; wherein the preset low value is less than the base sleep time.

[0037] In some embodiments of this application, the predicted hibernation time is calculated based on the rate of change of indoor temperature at the time of shutdown, specifically including:

[0038] In heating sleep mode, determine whether the rate of change of indoor temperature at the time of shutdown is positive;

[0039] If so, the predicted hibernation time is the product of the rate of change of indoor temperature at the time of shutdown and the third set coefficient; where the third set coefficient is a positive number.

[0040] If not, the predicted sleep time is 0 or a preset low value; wherein the preset low value is less than the base sleep time.

[0041] The technical solution of this invention has the following advantages over the prior art: In sleep mode, the air conditioning device of this invention acquires the indoor temperature, calculates the rate of change of the indoor temperature, and calculates the rate of change influence factor based on the rate of change; it calculates the dynamic hysteresis temperature based on the initial hysteresis temperature and the rate of change influence factor; it calculates the compressor start-up temperature and compressor stop-down temperature based on the set temperature and the dynamic hysteresis temperature; and then, based on the compressor start-up temperature and compressor stop-down temperature, it performs start-stop control on the compressor. Therefore, the air conditioning device of this invention adjusts the dynamic hysteresis temperature according to the indoor temperature change trend, thereby adjusting the compressor start-up temperature and compressor stop-down temperature, avoiding frequent compressor start-stop, improving the user experience, and solving the technical problem of frequent compressor start-stop in the prior art.

[0042] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 A flowchart of one embodiment of the steps performed by the control module of the air conditioning equipment of the present invention;

[0045] Figure 2 A flowchart of yet another embodiment of the steps performed by the control module;

[0046] Figure 3 A flowchart of yet another embodiment of the steps performed by the control module;

[0047] Figure 4 A flowchart of yet another embodiment of the steps performed by the control module;

[0048] Figure 5 A flowchart of yet another embodiment of the steps performed by the control module;

[0049] Figure 6 A flowchart of yet another embodiment of the steps performed by the control module;

[0050] Figure 7 A flowchart of yet another embodiment of the steps performed by the control module;

[0051] Figure 8 A flowchart of yet another embodiment of the steps performed by the control module;

[0052] Figure 9 A flowchart of yet another embodiment of the steps performed by the control module;

[0053] Figure 10 A flowchart of yet another embodiment of the steps performed by the control module. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0056] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0057] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0058] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0060] Air conditioners execute refrigeration and heating cycles using a compressor, condenser, expansion valve, and evaporator. These cycles are controlled by a controller, which manages the refrigerant flow and the opening of the expansion valve. The refrigeration and heating cycles involve a series of processes including compression, condensation, expansion, and evaporation, ultimately supplying refrigerant to the conditioned and heat-exchanged air.

[0061] The compressor compresses refrigerant gas under high temperature and pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0062] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve, returning the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0063] An air conditioner outdoor unit refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. An air conditioner indoor unit includes the indoor heat exchanger, and an expansion valve can be provided in either the outdoor or indoor unit.

[0064] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0065] The air conditioning equipment in this embodiment includes a compressor, a four-way valve, an outdoor heat exchanger, an electronic expansion valve, and an indoor heat exchanger. The compressor, four-way valve, outdoor heat exchanger, electronic expansion valve, and indoor heat exchanger form a refrigerant circulation loop. The electronic expansion valve is installed on the connecting pipe between the outdoor heat exchanger and the indoor heat exchanger and is used to regulate the refrigerant flow rate.

[0066] The air conditioning equipment in this embodiment includes a control module.

[0067] The control module is configured as follows:

[0068] In sleep mode, calculate the rate of change of indoor temperature; and based on the rate of change of indoor temperature, calculate the influencing factor of the rate of change.

[0069] Obtain the initial hysteresis temperature; and calculate the dynamic hysteresis temperature based on the initial hysteresis temperature and the rate of change influence factor.

[0070] Obtain the set temperature; and calculate the compressor start-up temperature and compressor shutdown temperature based on the set temperature and dynamic hysteresis temperature;

[0071] The compressor is controlled based on its start-up temperature and shutdown temperature.

[0072] The control module performs the following steps, see [link / reference]. Figure 1 As shown.

[0073] Step S11: In sleep mode, calculate the rate of change of indoor temperature dT / dt; and based on the rate of change of indoor temperature dT / dt, calculate the rate of change influence factor K_dT.

[0074] Real-time indoor temperature T_current is acquired, and the rate of change of indoor temperature dT / dt is calculated.

[0075] dT / dt represents the trend of warming or cooling, and the magnitude of the absolute value indicates the intensity of the trend.

[0076] Step S12: Obtain the initial hysteresis temperature H_base; and calculate the dynamic hysteresis temperature H_dynamic based on the initial hysteresis temperature H_base and the rate of change influence factor K_dT.

[0077] Step S13: Obtain the set temperature T_set; and based on the set temperature T_set and the dynamic hysteresis temperature H_dynamic, calculate the compressor start temperature T_start and the compressor stop temperature T_stop.

[0078] Step S14: Control the compressor based on the compressor start-up temperature T_start and the compressor stop temperature T_stop.

[0079] In this embodiment, the air conditioning unit, in sleep mode, acquires the indoor temperature, calculates the rate of change of the indoor temperature, and calculates the rate of change influence factor based on the rate of change. Based on the initial hysteresis temperature and the rate of change influence factor, it calculates the dynamic hysteresis temperature. Based on the set temperature and the dynamic hysteresis temperature, it calculates the compressor start-up temperature and compressor stop-down temperature. Then, based on the compressor start-up temperature and compressor stop-down temperature, it performs start-stop control on the compressor. Therefore, the air conditioning unit in this embodiment adjusts the dynamic hysteresis temperature according to the indoor temperature change trend, thereby adjusting the compressor start-up temperature and compressor stop-down temperature, avoiding frequent compressor start-stop, improving the user experience, and solving the technical problem of frequent compressor start-stop in the prior art.

[0080] In some embodiments of this application, the rate of change influence factor is calculated based on the indoor temperature change rate, specifically including the following steps, see [link to relevant documentation]. Figure 2 As shown.

[0081] Step S21: Obtain the first set coefficient a.

[0082] Step S22: Calculate the product of the absolute value of the indoor temperature change rate dT / dt and the first set coefficient a to obtain the change rate influence factor K_dT.

[0083] Wherein, the first set coefficient 'a' is a positive number. 'a' is an adjustable coefficient.

[0084] That is, the rate of change influence factor K_dT=a*|dT / dt|.

[0085] The rate of change factor K_dT is positively correlated with |dT / dt|.

[0086] Through design steps S21 to S22, the design change rate influence factor K_dT is equal to the product of the absolute value of the indoor temperature change rate dT / dt and the first set coefficient a. The change rate influence factor K_dT is positively correlated with |dT / dt|. The accurate change rate influence factor K_dT can be calculated, and then the accurate dynamic hysteresis temperature can be calculated.

[0087] In some embodiments of this application, the dynamic hysteresis temperature is calculated based on the initial hysteresis temperature and the rate of change influence factor. The specific steps include the following, see [link to relevant documentation]. Figure 3 As shown.

[0088] Step S31: Obtain the initial hysteresis temperature H_base.

[0089] Preset an initial hysteresis temperature H_base suitable for the compressor's steady state.

[0090] For example, the initial hysteresis temperature H_base is 0.5°C.

[0091] Step S32: Calculate the sum of the initial hysteresis temperature H_base and the rate of change influence factor K_dT to obtain the dynamic hysteresis temperature H_dynamic.

[0092] That is, the dynamic hysteresis temperature H_dynamic = H_base + K_dT.

[0093] By designing steps S31 to S32, the dynamic hysteresis temperature H_dynamic is designed to be equal to the sum of the initial hysteresis temperature H_base and the rate of change influence factor K_dT, thus obtaining the accurate dynamic hysteresis temperature H_dynamic. In this way, the accurate compressor start-up temperature and compressor stop temperature can be calculated.

[0094] Sleep modes include cooling sleep mode and heating sleep mode.

[0095] In some embodiments of this application, the compressor start-up temperature and compressor shutdown temperature are calculated based on a set temperature and a dynamic hysteresis temperature. Specifically, the calculation includes the following steps, see [link to relevant documentation]. Figure 4 As shown.

[0096] Step S41: In cooling sleep mode, obtain the set temperature T_set.

[0097] Set the temperature T_set to the target temperature for the cooling sleep mode.

[0098] Step S42:

[0099] The compressor start-up temperature T_start is obtained by calculating the sum of the setpoint temperature T_set and the dynamic hysteresis temperature H_dynamic. That is, the compressor start-up temperature T_start = T_set + H_dynamic.

[0100] The compressor stop temperature T_stop is obtained by calculating the difference between the set temperature T_set and the dynamic hysteresis temperature H_dynamic. That is, the compressor stop temperature T_stop = T_set - H_dynamic.

[0101] therefore,

[0102] The rate of change influence factor K_dT = a*|dT / dt|;

[0103] Dynamic hysteresis temperature H_dynamic = H_base + K_dT;

[0104] In cooling sleep mode, the compressor start temperature T_start = T_set + H_dynamic;

[0105] In cooling sleep mode, the compressor stop temperature T_stop = T_set - H_dynamic.

[0106] Therefore, by designing steps S41 to S42, in the cooling sleep mode, the compressor start temperature T_start is equal to the sum of the set temperature T_set and the dynamic hysteresis temperature H_dynamic, and the compressor stop temperature T_stop is equal to the difference between the set temperature T_set and the dynamic hysteresis temperature H_dynamic. This obtains the accurate compressor start temperature T_start and compressor stop temperature T_stop in the cooling sleep mode, thus avoiding frequent compressor start-stop.

[0107] In this application, when the temperature change is gradual, the dynamic hysteresis temperature H_dynamic is small, and a narrower hysteresis is used to maintain temperature accuracy; when the temperature change is drastic (whether it is heating or cooling), the dynamic hysteresis temperature H_dynamic is large, and the hysteresis is automatically widened to avoid the compressor from frequently operating at the hysteresis boundary due to small disturbances or rapid changing trends.

[0108] For example,

[0109] When dT / dt≈0, the indoor temperature is very stable, K_dT≈0, H_dynamic≈H_base, narrow hysteresis loop, achieving precise control of the compressor.

[0110] When |dT / dt| is large (such as in the middle of the night when the temperature drops rapidly), H_dynamic increases significantly (wide hysteresis). Even if the temperature briefly rises to near T_set+H_base, the compressor will not start as long as it does not reach T_set+H_dynamic, thus avoiding starting due to small fluctuations.

[0111] In some embodiments of this application, the compressor start-up temperature and compressor shutdown temperature are calculated based on a set temperature and a dynamic hysteresis temperature. Specifically, the calculation includes the following steps, see [link to relevant documentation]. Figure 5 As shown.

[0112] Step S51: In heating sleep mode, obtain the set temperature.

[0113] This set temperature is the target temperature for the heating sleep mode.

[0114] Step S52: Calculate the difference between the set temperature and the dynamic hysteresis temperature H_dynamic to obtain the compressor start-up temperature; calculate the sum of the set temperature and the dynamic hysteresis temperature H_dynamic to obtain the compressor stop-down temperature.

[0115] Therefore, by designing steps S51 to S52, in the heating sleep mode, the compressor start temperature is designed to be equal to the difference between the set temperature and the dynamic hysteresis temperature, and the compressor stop temperature is designed to be equal to the sum of the set temperature and the dynamic hysteresis temperature, so as to obtain the accurate compressor start temperature and compressor stop temperature in the heating sleep mode, and avoid frequent compressor start and stop.

[0116] In some embodiments of this application, the control module is further configured as follows:

[0117] In sleep mode, the indoor temperature change rate, change rate influence factor, dynamic hysteresis temperature, compressor start temperature, and compressor stop temperature are calculated every first set time interval (e.g., 5 minutes).

[0118] That is, in sleep mode, every first set time interval, the indoor temperature change rate, change rate influence factor, dynamic hysteresis temperature, compressor start temperature, and compressor stop temperature are calculated to update the compressor start temperature and compressor stop temperature in a timely manner, so as to achieve precise control of compressor start and stop.

[0119] Therefore, the control module specifically performs the following steps, see [link to relevant documentation]. Figure 6 As shown.

[0120] Step S11: In sleep mode, calculate the rate of change of indoor temperature dT / dt; and based on the rate of change of indoor temperature dT / dt, calculate the rate of change influence factor K_dT.

[0121] Step S12: Obtain the initial hysteresis temperature H_base; and calculate the dynamic hysteresis temperature H_dynamic based on the initial hysteresis temperature H_base and the rate of change influence factor K_dT.

[0122] Step S13: Obtain the set temperature T_set; and based on the set temperature T_set and the dynamic hysteresis temperature H_dynamic, calculate the compressor start temperature T_start and the compressor stop temperature T_stop.

[0123] Step S13-1: Determine whether the first set duration has been reached.

[0124] If the timer is reached, the timer restarts and the process returns to step S11.

[0125] If the target duration is not reached, continue to determine whether the first set duration has been reached.

[0126] By designing step S13-1, the compressor start-up temperature and compressor stop temperature are updated in a timely manner based on the rate of change of indoor temperature, thereby achieving precise control over the start and stop of the compressor.

[0127] In some embodiments of this application, the indoor temperature change rate dT / dt is the average indoor temperature change rate within the most recent first set time period (e.g., the most recent 5 minutes), in order to improve the accuracy of the temperature change rate calculation, and thus improve the accuracy of the calculation of the change rate influence factor, dynamic hysteresis temperature, compressor start-up temperature, and compressor stop-down temperature.

[0128] For example, the indoor real-time temperature change rate is calculated every second set time interval (e.g., 30 seconds), and the indoor temperature change rate dT / dt, i.e., the indoor average temperature change rate, is calculated every first set time interval (e.g., 5 minutes).

[0129] The average indoor temperature change rate is calculated based on all real-time indoor temperature change rates calculated within the most recent first set time period.

[0130] In some embodiments of this application, the control module is further configured to perform the following steps, see [link to relevant documentation]. Figure 7 As shown.

[0131] Step S61: Calculate the rate of change of indoor temperature dT / dt_shutdown at the moment the compressor stops, and calculate the predicted hibernation time T_trend based on the rate of change of indoor temperature dT / dt_shutdown at the moment of shutdown.

[0132] Step S62: Take the larger value between the set base sleep time T_base and the predicted sleep time T_trend as the intelligent minimum sleep time T_sleep_min.

[0133] Step S63: When the compressor's shutdown time reaches the intelligent minimum sleep time T_sleep_min, then determine whether the indoor temperature has reached the compressor's start-up temperature.

[0134] Base sleep time T_base: Sets a minimum protection time (e.g., 3 minutes) to prevent extreme instantaneous fluctuations in the compressor.

[0135] Predicted shutdown time T_trend: Based on the rate of temperature change dT / dt_shutdown at the moment the compressor is shut down, predicts the "safe time" for the temperature to recover to the point where the compressor needs to start working again.

[0136] The calculation of the intelligent minimum sleep period T_sleep_min is: T_sleep_min = max(T_base, T_trend).

[0137] After the compressor stops, based on the temperature change trend at the time of shutdown, a minimum waiting time, namely the minimum sleep time T_sleep_min, is intelligently set to allow the compressor to restart. This avoids the compressor from starting immediately due to a slight rebound when the temperature is about to naturally drop (or rise).

[0138] By designing steps S61 to S63, the minimum intelligent sleep time T_sleep_min after the compressor stops is calculated to avoid the compressor starting up in a short time after stopping.

[0139] In some embodiments of this application, the predicted hibernation time is calculated based on the rate of change of indoor temperature at the time of shutdown. This specifically includes the following steps, see [link to relevant documentation]. Figure 8 As shown.

[0140] Step S71: In cooling sleep mode, determine whether the rate of change of indoor temperature dT / dt_shutdown at the time of shutdown is negative.

[0141] If so, that is, if the rate of change of indoor temperature dT / dt_shutdown at the time of shutdown is negative, then proceed to step S72: predict the hibernation time T_trend as the product of the absolute value of the rate of change of indoor temperature dT / dt_shutdown at the time of shutdown and the second set coefficient b. Here, the second set coefficient b is a positive number; b is an adjustable coefficient.

[0142] If not, that is, if the rate of change of indoor temperature dT / dt_shutdown at the time of shutdown is positive or 0, then proceed to step S73: predict the hibernation time T_trend to be 0 or a preset low value; wherein, the preset low value is less than the base hibernation time T_base. The preset low value is a very small value.

[0143] Therefore, in cooling sleep mode, if dT / dt_shutdown < 0, then T_trend = b * |dT / dt_shutdown|. T_trend is positively correlated with |dT / dt_shutdown|.

[0144] If dT / dt_shutdown≥0, then T_trend is 0 or a preset low value.

[0145] In cooling sleep mode, if dT / dt_shutdown < 0 when the compressor is off, the temperature is decreasing, indicating sufficient "cooling inertia," and the cooling trend will continue for some time. T_trend can be set to be positively correlated with |dT / dt_shutdown|; the steeper the cooling trend, the longer the predicted sleep time.

[0146] If dT / dt_shutdown≥0, the temperature is about to stop decreasing or has already stopped and is starting to rise again, then T_trend =0 or a very small value (default low value).

[0147] Through design steps S71 to S73, in the cooling sleep mode, when the rate of change of indoor temperature at the time of compressor shutdown is less than 0, the predicted sleep time T_trend is the product of the absolute value of the rate of change of indoor temperature at the time of shutdown |dT / dt_shutdown| and the second set coefficient b. The predicted sleep time T_trend is positively correlated with |dT / dt_shutdown|. When the rate of change of indoor temperature at the time of compressor shutdown is greater than or equal to 0, the predicted sleep time T_trend is 0 or a preset low value, thus obtaining an accurate predicted sleep time T_trend.

[0148] In cooling sleep mode, a timer starts after the compressor shuts down. During the T_sleep_min time period, even if the temperature rises to or exceeds the compressor's start-up temperature T_set+H_dynamic, the compressor is prevented from starting. Only after the timer has exceeded T_sleep_min is it determined whether the indoor temperature has reached the compressor's start-up temperature.

[0149] For example, if the temperature drops rapidly when the compressor shuts down (dT / dt_shutdown is negative and has a large absolute value), then T_trend will be large (e.g., 10 minutes). Even if the temperature rises slightly to the start-up temperature after 2 minutes, the compressor will not start until at least max(3min, 10min) = 10 minutes later, making full use of the natural cooling trend.

[0150] If the temperature hardly drops when the compressor is turned off (dT / dt_shutdown≈0), then T_trend≈0, T_sleep_min=T_base=3min. After 3 minutes, it can be determined whether the indoor temperature has reached the compressor start-up temperature.

[0151] In some embodiments of this application, the predicted hibernation time is calculated based on the rate of change of indoor temperature at the time of shutdown. This specifically includes the following steps, see [link to relevant documentation]. Figure 9 As shown.

[0152] Step S81: In heating sleep mode, determine whether the rate of change of indoor temperature dT / dt_shutdown at the time of shutdown is positive.

[0153] If so, that is, if the rate of change of indoor temperature dT / dt_shutdown at the time of shutdown is positive, then proceed to step S82: predict the hibernation time T_trend as the product of the rate of change of indoor temperature dT / dt_shutdown at the time of shutdown and the third set coefficient c. Here, the third set coefficient c is positive; c is an adjustable coefficient.

[0154] If not, that is, if the rate of change of indoor temperature dT / dt_shutdown at the time of shutdown is negative or 0, then execute step S83: predict the hibernation time T_trend to be 0 or a preset low value; wherein, the preset low value is less than the base hibernation time T_base. The preset low value is a very small value.

[0155] Therefore, in heating sleep mode, if dT / dt_shutdown > 0, then T_trend = c * dT / dt_shutdown. T_trend is positively correlated with dT / dt_shutdown.

[0156] If dT / dt_shutdown≤0, then T_trend is 0 or a preset low value.

[0157] In heating sleep mode, if dT / dt_shutdown > 0 when the compressor is off, and the temperature is rising, it indicates sufficient "thermal inertia," and the rising temperature trend will continue for some time. T_trend can be set to be positively correlated with dT / dt_shutdown; the steeper the rising temperature trend, the longer the predicted sleep time.

[0158] If dT / dt_shutdown≤0, the temperature is about to stop rising or has already stopped falling, then T_trend =0 or a very small value (default low value).

[0159] Through design steps S81 to S83, in heating sleep mode, when the rate of change of indoor temperature at the time of compressor shutdown is greater than 0, the predicted sleep time T_trend is the product of the rate of change of indoor temperature at the time of shutdown dT / dt_shutdown and the third set coefficient c, and the predicted sleep time T_trend is positively correlated with dT / dt_shutdown; when the rate of change of indoor temperature at the time of compressor shutdown is less than or equal to 0, the predicted sleep time T_trend is 0 or a preset low value, thus obtaining an accurate predicted sleep time T_trend.

[0160] In some embodiments of this application, the air conditioning device is a parking air conditioning device.

[0161] Indoor temperature refers to the temperature inside the carriage.

[0162] The air conditioning equipment continuously and with high precision monitors the temperature T_current of the target area inside the carriage (such as near the sleeper berth in the driver's cab), calculates the real-time temperature change rate, and calculates the average temperature change rate within the most recent first set time period, and then calculates the dynamic hysteresis temperature, as well as the compressor start-up temperature and compressor shutdown temperature.

[0163] The air conditioning equipment of this application belongs to the field of parking air conditioning technology, and specifically relates to an operation control strategy for parking air conditioning in sleep mode.

[0164] This application proposes an adaptive hysteresis control and dynamic sleep period control strategy based on temperature change trends in sleep mode. This application monitors and analyzes the temperature change trend inside the vehicle (cabin) in real time, and dynamically adjusts two key control parameters accordingly: dynamic hysteresis temperature and the minimum sleep time after the compressor stops.

[0165] This application innovatively utilizes temperature change trends (dT / dt) as the core input parameter to dynamically and collaboratively adjust two key control variables: dynamic hysteresis temperature and minimum sleep time. This effectively solves the problem of frequent compressor start-stop caused by environmental disturbances or its own inertia in parking air conditioning sleep mode. This significantly improves the user experience and extends the compressor's lifespan.

[0166] Below, in conjunction with Figure 10 This section provides a detailed explanation of the operating logic of the air conditioning unit in cooling sleep mode.

[0167] Step S91: The air conditioner switches from normal cooling mode to sleep mode (cooling sleep mode) and obtains the initial set temperature T_set.

[0168] Step S92: Continuously collect indoor temperature T_current and calculate the rate of change of indoor temperature dT / dt.

[0169] Step S93: Calculate the current dynamic hysteresis temperature H_dynamic based on the indoor temperature change rate dT / dt.

[0170] Update the compressor start-up temperature boundary: T_start = T_set + H_dynamic;

[0171] Update the compressor stop temperature boundary: T_stop=T_set-H_dynamic.

[0172] Step S94: Determine whether the compressor is running.

[0173] If so, proceed to step S95: If the indoor temperature T_current≤T_stop, stop the compressor, calculate the shutdown time T_sleep_min based on the recorded dT / dt_shutdown, and start the hibernation timer.

[0174] If not, proceed to step S96: determine whether the air conditioner compressor is in a sleep period, i.e., determine whether the timer is < T_sleep_min.

[0175] If so, proceed to step S97: disable compressor startup.

[0176] If not, proceed to step S98: If the indoor temperature T_current ≥ T_start, start the compressor and record the current dT / dt as dT / dt_shutdown to prepare for calculating T_sleep_min for the next shutdown.

[0177] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0178] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air conditioning unit, characterized in that, include: The control module is configured as follows: In sleep mode, calculate the rate of change of indoor temperature; and based on the rate of change of indoor temperature, calculate the rate of change influence factor; Obtain the initial hysteresis temperature; and calculate the dynamic hysteresis temperature based on the initial hysteresis temperature and the rate of change influence factor. Obtain the set temperature; and calculate the compressor start-up temperature and compressor stop temperature based on the set temperature and the dynamic hysteresis temperature; The compressor is controlled based on its start-up temperature and shutdown temperature. Based on the indoor temperature change rate, the change rate influence factor is calculated, specifically including: The product of the absolute value of the indoor temperature change rate and the first set coefficient is calculated to obtain the change rate influence factor; wherein, the first set coefficient is a positive number; Based on the initial hysteresis temperature and the rate of change influence factor, the dynamic hysteresis temperature is calculated, specifically including: The dynamic hysteresis temperature is obtained by summing the initial hysteresis temperature and the rate of change influence factor. Based on the set temperature and the dynamic hysteresis temperature, the compressor start-up temperature and compressor shutdown temperature are calculated, specifically including: In cooling sleep mode The compressor start-up temperature is obtained by calculating the sum of the set temperature and the dynamic hysteresis temperature. The compressor shutdown temperature is obtained by calculating the difference between the set temperature and the dynamic hysteresis temperature.

2. The air conditioning equipment according to claim 1, characterized in that: Based on the set temperature and the dynamic hysteresis temperature, the compressor start-up temperature and compressor shutdown temperature are calculated, specifically including: In heating sleep mode The compressor start-up temperature is obtained by calculating the difference between the set temperature and the dynamic hysteresis temperature. The compressor shutdown temperature is obtained by calculating the sum of the set temperature and the dynamic hysteresis temperature.

3. The air conditioning equipment according to claim 1, characterized in that: The control module is also configured to: In sleep mode, the indoor temperature change rate, change rate influence factor, dynamic hysteresis temperature, compressor start temperature and compressor stop temperature are calculated every first set time interval.

4. The air conditioning equipment according to claim 3, characterized in that: The indoor temperature change rate is the average indoor temperature change rate over the most recent first set time period.

5. The air conditioning equipment according to any one of claims 1 to 4, characterized in that: The control module is also configured to: Calculate the rate of change of indoor temperature at the moment the compressor stops, and calculate the predicted hibernation time based on the rate of change of indoor temperature at the moment of shutdown; The larger value between the set base sleep time and the predicted sleep time will be used as the intelligent minimum sleep time. When the compressor's shutdown time reaches the intelligent minimum sleep time, it is then determined whether the indoor temperature has reached the compressor's start-up temperature.

6. The air conditioning equipment according to claim 5, characterized in that: Based on the rate of change of indoor temperature at the time of shutdown, the predicted hibernation time is calculated, specifically including: In cooling sleep mode, determine whether the rate of change of indoor temperature at the time of shutdown is negative; If so, the predicted hibernation time is the product of the absolute value of the rate of change of indoor temperature at the time of shutdown and the second set coefficient; where the second set coefficient is a positive number. If not, the predicted sleep time is 0 or a preset low value; wherein the preset low value is less than the base sleep time.

7. The air conditioning equipment according to claim 5, characterized in that: Based on the rate of change of indoor temperature at the time of shutdown, the predicted hibernation time is calculated, specifically including: In heating sleep mode, determine whether the rate of change of indoor temperature at the time of shutdown is positive; If so, the predicted hibernation time is the product of the rate of change of indoor temperature at the time of shutdown and the third set coefficient; where the third set coefficient is a positive number. If not, the predicted sleep time is 0 or a preset low value; wherein the preset low value is less than the base sleep time.

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