Control method, device, storage medium and system of parking air conditioner

Abstract

The application provides a control method and device of a parking air conditioner, a storage medium and a system. The method comprises the following steps: acquiring an exhaust temperature change rate of a compressor of the parking air conditioner in a preset time period and an electric appliance box temperature of the parking air conditioner; determining a compensation coefficient according to the exhaust temperature change rate, wherein the compensation coefficient represents a compensation degree of an operating frequency of the compressor; determining a target frequency of the compressor according to the electric appliance box temperature and the compensation coefficient, and controlling the parking air conditioner to operate according to the target frequency. The application solves the problem that the compressor frequency adjustment of the existing backpack-type parking air conditioner is not timely in a complex external environment.

Description

Technical Field

[0001] This application relates to the field of vehicle air conditioning control technology, and more specifically, to a control method for a parking air conditioner, a control device for a parking air conditioner, a computer-readable storage medium, and a control system for a parking air conditioner. Background Technology

[0002] Existing parking air conditioners typically require determining the compressor's operating frequency based on ambient temperature. To reduce the impact of heat radiation from the driver's cab on the external temperature sensing elements, some solutions use surface-mount NTC thermistors in the electrical box to detect temperature and adjust the compressor frequency accordingly. However, when a vehicle moves from a sunny area into a tunnel, a shady area, or encounters sudden rain or temperature drops, the electrical box temperature, due to thermal inertia, may fail to reflect rapid changes in the external environment or heat load in a timely manner. This results in untimely compressor frequency adjustment, affecting the comfort, energy efficiency, and operational stability of the parking air conditioner. Summary of the Invention

[0003] The main objective of this application is to provide a control method, a control device, a computer-readable storage medium, and a control system for a parking air conditioner, so as to at least solve the problem of untimely compressor frequency adjustment in existing backpack-type parking air conditioners under complex external environments.

[0004] To achieve the above objectives, according to one aspect of this application, a control method for a parking air conditioner is provided, comprising: acquiring the exhaust temperature change rate of the compressor of the parking air conditioner and the electrical box temperature of the parking air conditioner within a preset time period; determining a compensation coefficient based on the exhaust temperature change rate, the compensation coefficient representing the degree of compensation for the operating frequency of the compressor; determining a target frequency of the compressor based on the electrical box temperature and the compensation coefficient, and controlling the operation of the parking air conditioner based on the target frequency.

[0005] Optionally, determining the compensation coefficient based on the exhaust temperature change rate includes: determining a first absolute value as the absolute value of the exhaust temperature change rate; if the first absolute value is less than or equal to a first preset change rate, determining the compensation coefficient as a preset compensation coefficient; if the first absolute value is greater than the first preset change rate, determining the compensation coefficient based on the exhaust temperature change rate and the first preset change rate.

[0006] Optionally, when the first absolute value is greater than the first preset rate of change, determining the compensation coefficient based on the exhaust temperature change rate and the first preset rate of change includes: when the exhaust temperature change rate is greater than the first preset rate of change, determining a first difference as the difference between the exhaust temperature change rate and the first preset rate of change; determining a first product as the product of a first preset sensitivity coefficient and the first difference; determining the compensation coefficient as the sum of the first product and a preset constant; when the exhaust temperature change rate is less than the negative of the first preset rate of change, determining a second difference as the difference between the absolute value of the exhaust temperature change rate and the first preset rate of change; determining a second product as the product of the second difference and a second preset sensitivity coefficient; and determining the compensation coefficient as the difference between the preset constant and the second product.

[0007] Optionally, determining the target frequency of the compressor based on the electrical box temperature and the compensation coefficient includes: determining the target reference frequency corresponding to the electrical box temperature based on the electrical box temperature and a preset mapping table, wherein the preset mapping table is a mapping table between the electrical box temperature and the reference frequency; determining the calculated frequency as the product of the target reference frequency and the compensation coefficient; and determining the target frequency based on the calculated frequency.

[0008] Optionally, determining the target frequency based on the calculated frequency includes: determining the calculated frequency as the target frequency when the calculated frequency is greater than or equal to a preset minimum frequency and less than or equal to a preset maximum frequency; determining the preset minimum frequency as the target frequency when the calculated frequency is less than the preset minimum frequency; and determining the preset maximum frequency as the target frequency when the calculated frequency is greater than the preset maximum frequency.

[0009] Optionally, controlling the operation of the parking air conditioner according to the target frequency includes: obtaining the current operating frequency of the compressor; determining the frequency adjustment rate of the compressor according to the current operating frequency and the target frequency, wherein the frequency adjustment rate characterizes the change range of the operating frequency of the compressor per unit time; and controlling the operating frequency of the compressor to change from the current operating frequency to the target frequency based on the frequency adjustment rate.

[0010] Optionally, determining the frequency adjustment rate of the compressor based on the current operating frequency and the target frequency includes: determining a third difference as the difference between the target frequency and the current operating frequency; determining a second absolute value as the absolute value of the third difference; and determining the frequency adjustment rate as the ratio of the second absolute value to a preset adjustment duration.

[0011] According to another aspect of this application, a control device for a parking air conditioner is provided, comprising: an acquisition unit for acquiring the exhaust temperature change rate of the compressor of the parking air conditioner and the electrical box temperature of the parking air conditioner within a preset time period; a first determination unit for determining a compensation coefficient based on the exhaust temperature change rate, the compensation coefficient representing the degree of compensation for the operating frequency of the compressor; and a second determination unit for determining a target frequency of the compressor based on the electrical box temperature and the compensation coefficient, and controlling the operation of the parking air conditioner based on the target frequency.

[0012] According to another aspect of this application, a computer-readable storage medium is provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform any of the methods described.

[0013] According to another aspect of this application, a control system for a parking air conditioner is provided, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including methods for performing any one of the methods described.

[0014] By applying the technical solution of this application, the compressor's exhaust temperature change rate within a preset time period is obtained, and a compensation coefficient is determined based on this exhaust temperature change rate. This allows the compressor's target frequency to be dynamically corrected according to the transient heat load changes reflected by the exhaust temperature change rate. Therefore, when the backpack-type parking air conditioner is in complex external environments such as direct sunlight, tunnels, shady areas, or sudden temperature drops, the compressor's operating frequency can be compensated and controlled in advance. This avoids untimely compressor frequency adjustment due to lag in the electrical box's temperature response, thereby improving the timeliness of the parking air conditioner's cooling control. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 A schematic flowchart of a parking air conditioner control method according to an embodiment of this application is shown;

[0017] Figure 2 A schematic diagram of the internal structure of a parking air conditioning electrical box according to an embodiment of this application is shown;

[0018] Figure 3 A schematic flowchart of another parking air conditioner control method provided according to an embodiment of this application is shown;

[0019] Figure 4 A structural block diagram of a parking air conditioner control device provided according to an embodiment of this application is shown. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] As described in the background section, existing backpack-type parking air conditioners suffer from untimely compressor frequency adjustment in complex external environments. To address the aforementioned technical problems, embodiments of this application provide a parking air conditioner control method, a parking air conditioner control device, a computer-readable storage medium, and a parking air conditioner control system.

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] Figure 1 This is a flowchart of a parking air conditioner control method according to an embodiment of this application. Figure 1 As shown, the method includes the following steps:

[0026] Step S101: Obtain the rate of change of exhaust temperature of the compressor of the parking air conditioner and the temperature of the electrical box of the parking air conditioner within a preset time period.

[0027] Specifically, during the operation of the parking air conditioner, the rate of change of the compressor's exhaust temperature over a preset time period is obtained. The rate of change of exhaust temperature reflects the change of the compressor's exhaust temperature over time, that is, it is used to characterize whether the external environment or heat load of the parking air conditioner is undergoing rapid changes.

[0028] Step S102: Determine the compensation coefficient based on the above-mentioned exhaust temperature change rate. The compensation coefficient represents the degree of compensation for the operating frequency of the above-mentioned compressor.

[0029] Specifically, since the rate of change of exhaust temperature can quickly reflect changes in heat load, determining the compensation coefficient based on the rate of change of exhaust temperature allows the compensation coefficient to change with variations in the external environment or heat load. The compensation coefficient characterizes the degree of compensation for the compressor's operating frequency. When changes in the external environment or heat load are significant, the compensation coefficient can increase or decrease accordingly, thus providing a basis for subsequent correction of the compressor's target frequency.

[0030] Step S103: Determine the target frequency of the compressor based on the temperature of the electrical box and the compensation coefficient, and control the operation of the parking air conditioner based on the target frequency.

[0031] Through the above embodiments, by obtaining the rate of change of the compressor's exhaust temperature within a preset time period and determining a compensation coefficient based on this rate of change, the compressor's target frequency can be dynamically corrected according to the transient heat load changes reflected by the rate of change of exhaust temperature. Therefore, when the backpack-type parking air conditioner is in complex external environments such as under direct sunlight, in tunnels, in the shade, or experiencing sudden temperature drops, the compressor's operating frequency can be compensated and controlled in advance, avoiding untimely compressor frequency adjustment due to lag in the electrical box's temperature response, thereby improving the timeliness of the parking air conditioner's cooling control.

[0032] In some exemplary embodiments, the compressor discharge temperature is detected by a discharge temperature sensor installed in the compressor discharge line. Since changes in the compressor discharge temperature directly reflect real-time changes in the refrigerant load, and the discharge temperature sensor has a fast response speed, the discharge temperature change rate can be used to reflect the change in compressor discharge temperature over time. The electrical box temperature can be detected by a surface-mount NTC thermistor installed in the parking air conditioning electrical box. Specifically, such as... Figure 2As shown, the electrical box of the parking air conditioner contains components such as an inverter circuit, a DC / DC power supply circuit, a main chip, a programmable interface, a temperature sensor, a MOSFET driver circuit, a 485 communication circuit, and an NTC resistor. The NTC resistor is located inside the electrical box and is electrically connected to the main chip. The controller can acquire the detection signal from the NTC resistor through the main chip and determine the temperature of the electrical box based on this signal. Through the above setup, the temperature of the electrical box can be obtained using the NTC resistor, thus providing a temperature basis for determining the target frequency of the compressor.

[0033] In one alternative, determining the compensation coefficient based on the exhaust temperature change rate includes: determining a first absolute value as the absolute value of the exhaust temperature change rate; if the first absolute value is less than or equal to a first preset change rate, determining the compensation coefficient as a preset compensation coefficient; if the first absolute value is greater than the first preset change rate, determining the compensation coefficient based on the exhaust temperature change rate and the first preset change rate.

[0034] By determining the absolute value of the exhaust temperature change rate and comparing it with a first preset change rate, it is possible to determine whether the overall change in compressor exhaust temperature within a preset time period reaches the level requiring frequency compensation, regardless of whether the exhaust temperature is rising or falling. Therefore, when the exhaust temperature change is small, setting the compensation coefficient to a preset value avoids frequent adjustments to the compressor operating frequency due to small temperature fluctuations or detection noise, improving the stability of the parking air conditioner operation. When the exhaust temperature change is large, the compensation coefficient is determined based on the exhaust temperature change rate and the first preset change rate, allowing the compensation coefficient to adjust according to the degree of exhaust temperature change. This enables the compressor operating frequency to respond promptly to rapid changes in the external environment or heat load, improving the problem of untimely compressor frequency adjustment under complex external environments.

[0035] In some embodiments, after determining the compensation coefficient based on the exhaust temperature change rate, the compensation coefficient is further limited according to a preset compensation range. Specifically, the preset compensation range includes an upper limit and a lower limit for the compensation coefficient. If the compensation coefficient is greater than the upper limit, the upper limit is determined as the compensation coefficient; if the compensation coefficient is less than the lower limit, the lower limit is determined as the compensation coefficient; if the compensation coefficient is greater than or equal to the lower limit and less than or equal to the upper limit, the compensation coefficient remains unchanged.

[0036] The upper and lower limits of the compensation coefficient can be preset according to the compressor's allowable frequency compensation range, compressor reliability requirements, and the overall control strategy of the parking air conditioner. For example, the upper limit of the compensation coefficient can be 1.25, indicating that the compressor's operating frequency is allowed to increase to a maximum of 125% of the target reference frequency; the lower limit of the compensation coefficient can be 0.75, indicating that the compressor's operating frequency is allowed to decrease to a minimum of 75% of the target reference frequency. This avoids excessively large or small compensation coefficients that could lead to excessively large adjustments in the compressor's operating frequency, thereby improving the safety and stability of compressor operation.

[0037] The first preset rate of change can be pre-set based on the overall calibration results of the parking air conditioner, the fluctuation range of the compressor exhaust temperature under normal operating conditions, the detection accuracy of the exhaust temperature sensor, and the degree of temperature change that requires frequency compensation control of the parking air conditioner. The first preset rate of change is used to distinguish between normal fluctuations in the compressor exhaust temperature and rapid changes requiring frequency compensation. That is, when the absolute value of the exhaust temperature change rate is less than or equal to the first preset rate of change, the compressor exhaust temperature change is considered not to have reached the level required to trigger dynamic compensation; when the absolute value of the exhaust temperature change rate is greater than the first preset rate of change, the compressor exhaust temperature change is considered significant, and compensation of the compressor operating frequency is required based on the exhaust temperature change rate.

[0038] The preset compensation coefficient is pre-set based on the compressor's baseline control strategy when frequency compensation is not triggered. The preset compensation coefficient indicates that when the exhaust temperature variation is small, no additional compensation is performed on the compressor's operating frequency, or only baseline compensation is performed. For example, the preset compensation coefficient can be 1, ensuring that when the absolute value of the exhaust temperature change rate does not exceed a first preset change rate, the compensation coefficient does not change the frequency control result determined based on the electrical box temperature, thereby avoiding frequent adjustments to the compressor's operating frequency due to small fluctuations in exhaust temperature.

[0039] In some embodiments, after obtaining the rate of change of the compressor's exhaust temperature over a preset time period, the absolute value of the rate of change is first determined and used as the first absolute value. Since the rate of change of the exhaust temperature may be positive or negative, the magnitude of the change in the compressor's exhaust temperature over the preset time period can be determined by determining the absolute value of the rate of change.

[0040] Furthermore, the first absolute value is compared with the first preset rate of change. The first preset rate of change is a pre-set threshold used to determine whether the exhaust temperature has changed significantly. If the first absolute value is less than or equal to the first preset rate of change, it indicates that the change in compressor exhaust temperature within the preset time period is small, and the current exhaust temperature change does not reach the level requiring additional compensation to the compressor operating frequency. In this case, the compensation coefficient is determined as the preset compensation coefficient, and the compressor operating frequency is controlled according to the normal compensation level. If the first absolute value is greater than the first preset rate of change, it indicates that the change in compressor exhaust temperature within the preset time period is large, and the current exhaust temperature change has reached the level requiring compensation adjustment to the compressor operating frequency. In this case, the controller determines the compensation coefficient based on the exhaust temperature change rate and the first preset rate of change, allowing the compensation coefficient to be adjusted according to changes in exhaust temperature, thereby improving the timeliness of the parking air conditioner's response to changes in the external environment or heat load.

[0041] In some exemplary embodiments, when the first absolute value is greater than the first preset rate of change, determining the compensation coefficient based on the exhaust temperature change rate and the first preset rate of change includes: when the exhaust temperature change rate is greater than the first preset rate of change, determining a first difference as the difference between the exhaust temperature change rate and the first preset rate of change; determining a first product as the product of a first preset sensitivity coefficient and the first difference; determining the compensation coefficient as the sum of the first product and a preset constant; when the exhaust temperature change rate is less than the negative of the first preset rate of change, determining a second difference as the difference between the absolute value of the exhaust temperature change rate and the first preset rate of change; determining a second product as the product of the second difference and a second preset sensitivity coefficient; and determining the compensation coefficient as the difference between the preset constant and the second product.

[0042] By determining compensation coefficients for both rapid rises and rapid falls in exhaust temperature, the compensation coefficients can reflect not only the magnitude of exhaust temperature changes but also the direction of those changes. This avoids the problem of inaccurate frequency compensation direction caused by using a single compensation method, thereby improving the control adaptability and responsiveness of the parking air conditioner under sudden heating or cooling conditions.

[0043] In some embodiments, if the first absolute value is greater than the first preset rate of change, it indicates that the change in the compressor exhaust temperature within a preset time period has exceeded the preset range. In this case, the controller further determines the adjustment direction of the compensation coefficient based on the sign of the exhaust temperature change rate.

[0044] Specifically, when the exhaust temperature change rate exceeds a first preset change rate, it indicates that the compressor exhaust temperature is trending upward within a preset time period, and the increase exceeds the first preset change rate. In this case, the controller determines the first difference as the difference between the exhaust temperature change rate and the first preset change rate, and calculates the first product by multiplying the first preset sensitivity coefficient by the first difference. The first preset sensitivity coefficient characterizes the magnitude of change in the compensation coefficient as the degree of exceedance increases after the exhaust temperature change rate exceeds the first preset change rate. The controller adds the first product to a preset constant to obtain the compensation coefficient. Therefore, the greater the degree to which the exhaust temperature change rate exceeds the first preset change rate, the larger the compensation coefficient.

[0045] If the rate of change of exhaust temperature is less than the negative of the first preset rate of change, it indicates that the compressor exhaust temperature is trending downwards within a preset time period, and the magnitude of the decrease exceeds the first preset rate of change. In this case, the controller determines the second difference as the difference between the absolute value of the exhaust temperature change rate and the first preset rate of change, and then multiplies this second difference by a second preset sensitivity coefficient to obtain the second product. The second preset sensitivity coefficient characterizes the magnitude of change in the compensation coefficient as the degree of exhaust temperature decrease increases after it exceeds the first preset rate of change. The controller subtracts a preset constant from the second product to obtain the compensation coefficient. Therefore, the greater the degree to which the exhaust temperature decrease exceeds the first preset rate of change, the smaller the compensation coefficient.

[0046] In some exemplary embodiments of this application, determining the target frequency of the compressor based on the electrical box temperature and the compensation coefficient includes: determining the target reference frequency corresponding to the electrical box temperature based on the electrical box temperature and a preset mapping table, wherein the preset mapping table is a mapping table between the electrical box temperature and the reference frequency; determining the calculated frequency as the product of the target reference frequency and the compensation coefficient; and determining the target frequency based on the calculated frequency.

[0047] By determining the target reference frequency based on the electrical box temperature and a preset mapping table, the compressor frequency control can be matched first with the electrical box temperature currently detected by the parking air conditioner, ensuring that the compressor operating frequency has a clear temperature control basis. Furthermore, by multiplying the target reference frequency by a compensation coefficient to obtain the calculated frequency, a compensation level corresponding to the exhaust temperature change rate can be introduced on top of the frequency determined based on the electrical box temperature. This allows the calculated frequency to simultaneously reflect both the basic operating requirements corresponding to the electrical box temperature and the compensation requirements caused by changes in the external environment or heat load. Therefore, the problem of response lag when determining the compressor frequency solely based on the electrical box temperature can be avoided, making the compressor target frequency more consistent with the actual operating state of the parking air conditioner and improving the accuracy and timeliness of compressor frequency adjustment under complex external environments.

[0048] For example, a surface-mount NTC thermistor can be placed in the low-voltage area of ​​the controller's electrical box to reduce the impact of heat generated by high-voltage components on the temperature detection results. The controller can periodically acquire the output signal of the surface-mount NTC thermistor and convert the output signal into the electrical box temperature. Thus, the electrical box temperature, which characterizes the current operating ambient temperature of the parking air conditioner, can be obtained.

[0049] In some embodiments, after obtaining the electrical box temperature and compensation coefficient, the target reference frequency of the compressor is determined based on the electrical box temperature. Here, the electrical box temperature represents the temperature state of the current operating environment of the parking air conditioner, and the target reference frequency can be understood as the compressor operating frequency corresponding to the electrical box temperature without considering the compensation coefficient.

[0050] Specifically, the controller pre-stores a preset mapping table, which represents the correspondence between the electrical box temperature and the reference frequency. For example, the preset mapping table may include multiple electrical box temperature ranges and the reference frequency corresponding to each temperature range. After obtaining the electrical box temperature, the controller can query the preset mapping table based on that temperature to determine the target reference frequency. Further, the controller multiplies the target reference frequency by a compensation coefficient to obtain the calculated frequency. The compensation coefficient is used to correct the target reference frequency, ensuring that the calculated frequency reflects the degree of compensation for the compressor's operating frequency. Subsequently, the controller determines the compressor's target frequency based on the calculated frequency. For example, the calculated frequency can be used as the compressor's target frequency, causing the compressor to operate at that target frequency. Thus, the compressor's target frequency can both match the reference frequency corresponding to the electrical box temperature and be corrected by the compensation coefficient, thereby improving the accuracy of the compressor frequency determination.

[0051] In some further exemplary embodiments of this application, determining the target frequency based on the calculated frequency includes: determining the calculated frequency as the target frequency when the calculated frequency is greater than or equal to a preset minimum frequency and less than or equal to a preset maximum frequency; determining the preset minimum frequency as the target frequency when the calculated frequency is less than the preset minimum frequency; and determining the preset maximum frequency as the target frequency when the calculated frequency is greater than the preset maximum frequency.

[0052] By comparing the calculated frequency with the preset minimum frequency and preset maximum frequency, and determining the target frequency based on the comparison results, the target frequency of the compressor can be limited to the allowable frequency range, avoiding abnormal compressor operation caused by the calculated frequency being too low or too high.

[0053] In some embodiments, the preset minimum frequency and preset maximum frequency can be obtained through whole-machine experimental calibration and stored in the controller. The preset minimum frequency is used to limit the lower limit of the compressor's operating frequency to avoid insufficient cooling capacity or decreased operational stability due to excessively low compressor operating frequency; the preset maximum frequency is used to limit the upper limit of the compressor's operating frequency to avoid excessive compressor load, increased power consumption, or decreased reliability due to excessively high compressor operating frequency. Thus, by limiting the calculated frequency through the preset minimum and preset maximum frequencies, the compressor can operate within a safe and reliable frequency range.

[0054] In one optional embodiment, controlling the operation of the parking air conditioner according to the target frequency includes: obtaining the current operating frequency of the compressor; determining the frequency adjustment rate of the compressor based on the current operating frequency and the target frequency, wherein the frequency adjustment rate characterizes the change range of the operating frequency of the compressor per unit time; and controlling the operating frequency of the compressor to change from the current operating frequency to the target frequency based on the frequency adjustment rate.

[0055] By acquiring the compressor's current operating frequency and determining the frequency adjustment rate based on the current and target frequencies, the compressor's operating frequency can be gradually changed from the current frequency to the target frequency according to a preset range, rather than jumping directly to the target frequency. This reduces the impact of sudden frequency changes on the compressor and refrigeration system, avoids vibration, increased noise, or operational instability caused by abrupt changes in compressor operating conditions, and improves the stability and reliability of the parking air conditioner's operation.

[0056] In some exemplary embodiments, determining the frequency adjustment rate of the compressor based on the current operating frequency and the target frequency includes: determining a third difference as the difference between the target frequency and the current operating frequency; determining a second absolute value as the absolute value of the third difference; and determining the frequency adjustment rate as the ratio of the second absolute value to a preset adjustment duration.

[0057] By determining the third difference between the target frequency and the current operating frequency, and further taking the absolute value of the third difference to obtain the second absolute value, the required adjustment range of the compressor operating frequency can be accurately obtained. The ratio of the second absolute value to the preset adjustment time is then determined as the frequency adjustment rate, ensuring that the compressor's frequency change speed matches the frequency adjustment range and the preset adjustment time. This avoids abrupt changes in the compressor operating frequency from the current frequency to the target frequency, allowing the compressor to smoothly complete the frequency adjustment within the preset adjustment time. This reduces mechanical shock and operational fluctuations caused by frequency abrupt changes, improving the stability and reliability of the parking air conditioner's operation.

[0058] In some embodiments, after determining the target frequency of the compressor, the controller acquires the current operating frequency of the compressor. The current operating frequency is the actual operating frequency of the compressor at the current moment. Further, the controller determines the compressor's frequency adjustment rate based on the current operating frequency and the target frequency. Specifically, the controller determines a third difference as the difference between the target frequency and the current operating frequency, and determines the absolute value of the third difference, using this absolute value as the second absolute value. The second absolute value characterizes the total magnitude of the compressor's operating frequency adjustment. A preset adjustment duration is acquired, and the ratio of the second absolute value to the preset adjustment duration is determined as the frequency adjustment rate. The preset adjustment duration can be pre-set according to the compressor's operational stability requirements, frequency response requirements, and overall control strategy; the frequency adjustment rate characterizes the magnitude of change in the compressor's operating frequency per unit time. After determining the frequency adjustment rate, the controller controls the compressor's operating frequency to gradually change from the current operating frequency to the target frequency based on this frequency adjustment rate. That is, when there is a difference between the current operating frequency and the target frequency, the controller does not directly switch the compressor's operating frequency to the target frequency, but rather, according to the determined frequency adjustment rate, gradually approaches and reaches the target frequency within the preset adjustment duration. This avoids sudden changes in compressor operating frequency, reduces the impact of rapid frequency changes on the compressor and refrigeration system, and improves the stability and reliability of the parking air conditioner during operation.

[0059] In some embodiments, the preset adjustment time is 3 to 5 seconds. Based on the compressor's operational stability requirements, the difference between the current operating frequency and the target frequency, and the overall machine control strategy, the preset adjustment time is determined within 3 to 5 seconds, and the frequency adjustment rate is calculated based on the preset adjustment time to ensure that the compressor's operating frequency smoothly transitions to the target frequency.

[0060] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the parking air conditioner control method of this application will be described in detail below with reference to specific embodiments.

[0061] This embodiment relates to a specific method for controlling a parking air conditioner, such as... Figure 3 As shown, it includes the following steps:

[0062] Step S1: Temperature parameter acquisition;

[0063] Specifically, during the operation of the parking air conditioner, the controller collects the compressor exhaust temperature and the electrical box temperature. The compressor exhaust temperature is denoted as T. 排气 The temperature of the electrical box is recorded as T. NTC The controller can collect the compressor exhaust temperature according to a preset sampling period and determine the change in exhaust temperature based on the compressor exhaust temperature at adjacent sampling times.

[0064] In some embodiments, the preset sampling period can be 1000ms, that is, the controller collects the compressor exhaust temperature every 1000ms to obtain temperature data for calculating the rate of change of exhaust temperature.

[0065] , among which, T 排气 (t) represents the compressor exhaust temperature at the current sampling time, T 排气 (t-Δt) represents the compressor exhaust temperature at the previous sampling time, and Δt represents the sampling period.

[0066] Furthermore, the exhaust temperature change rate is determined based on the exhaust temperature change and the sampling period: Rate 排气 =ΔT 排气 / Δt, where Rate 排气 It indicates the degree of change in compressor discharge temperature per unit time.

[0067] Step S2: Determine the compensation status;

[0068] Specifically, the controller determines the exhaust temperature change rate. 排气 The absolute value of the rate of change is calculated and compared with a first preset rate of change K1. When: |Rate 排气 When |≤K1, it indicates that the change in compressor discharge temperature has not exceeded the preset range, and the controller sets the compensation coefficient K to the preset compensation coefficient. When |Rate 排气 If | > K1, it indicates that the change in compressor exhaust temperature exceeds the preset range. Therefore, the discharge temperature change rate (Rate) should be used. 排气 The compensation coefficient K is further calculated based on the first preset rate of change K1.

[0069] Step S3: Calculate the compensation coefficient;

[0070] Specifically, in Rate 排气 When K > K1, it indicates that the compressor discharge temperature is trending upwards, and the increase exceeds the first preset rate of change. In this case, the controller determines the compensation coefficient according to the following formula: K = C + α × (Rate) 排气 -K1), where C is a preset constant and α is the first preset sensitivity coefficient. Rate 排气 -K1 represents the degree to which the exhaust temperature change rate exceeds the first preset change rate. The larger this value is, the larger the compensation coefficient K is. For example, C is 1, K1 is 3℃ / min, and α is 0.05 / (℃ / min).

[0071] Rate 排气When the value is less than -K1, it indicates that the compressor discharge temperature is decreasing, and the decrease exceeds the first preset rate of change. In this case, the controller determines the compensation coefficient according to the following formula: K = C - β × (|Rate) 排气 |-K1), where β is the second preset sensitivity coefficient. |Rate 排气 |-K1 represents the degree to which the decrease in exhaust temperature exceeds the first preset rate of change. The larger this value, the smaller the compensation coefficient K. In this way, the compensation coefficient can be adjusted according to the rising or falling trend of the compressor exhaust temperature.

[0072] Step S4: Calculate the operating frequency;

[0073] Specifically, based on the temperature T of the electrical box NTC Query the preset mapping table to determine the target reference frequency corresponding to the temperature of the electrical box, denoted as: F 基准 (T NTC The preset mapping table is a table showing the correspondence between the temperature of the electrical box and the reference frequency. The calculation frequency is determined based on the target reference frequency and the compensation coefficient.

[0074] F 计算 =F 基准 (T NTC )×K, where F 计算 This is the calculated frequency obtained after correction by the compensation coefficient.

[0075] Furthermore, the controller determines the target frequency based on the calculated frequency and the preset frequency range. The preset frequency range includes a preset minimum frequency F. min and preset maximum frequency F max When F min ≤F 计算 ≤F max At that time, F 计算 Determined as the target frequency; when F 计算 <F min At that time, F min Determined as the target frequency; when F 计算 >F max At that time, F max The target frequency was determined.

[0076] Step S5: Frequency transition control.

[0077] Specifically, obtain the current operating frequency of the compressor, denoted as F. 当前 And according to the target frequency F 目标 Determine the frequency difference with the current operating frequency: ΔF = F 目标 -F 当前 And determine the absolute value of the frequency difference, and adjust the duration T according to the preset time. 调整Determine the frequency adjustment rate: V = |ΔF| / T 调整 Where V is the frequency adjustment rate, which represents the magnitude of change in the compressor's operating frequency per unit time. After determining the frequency adjustment rate, the compressor's operating frequency is controlled to gradually change from the current operating frequency to the target frequency based on this frequency adjustment rate, in order to avoid sudden changes in the compressor's operating frequency.

[0078] This application also provides a specific application scenario for a parking air conditioner control method. The controller collects the compressor exhaust temperature according to a preset sampling period of 1000ms, meaning the compressor exhaust temperature is collected every 1 second. The exhaust temperature change rate is determined based on two consecutive collected compressor exhaust temperatures. Specifically, based on the compressor exhaust temperature T at the current sampling time... 排气 (t) and the compressor exhaust temperature T at the previous sampling time 排气 (t-Δt), the rate of change of exhaust temperature is determined according to the following formula:

[0079] Rate 排气 =[T 排气 (t)-T 排气 [(t-Δt)] / Δt, where Δt=1s. In this embodiment, the first preset rate of change K1 is 3.0℃ / min. When |Rate 排气 When |≤3.0℃ / min, it indicates that the change in compressor exhaust temperature has not exceeded the trigger threshold. The controller can set the compensation coefficient to the preset compensation coefficient, for example, compensation coefficient K=1.

[0080] When Rate 排气 When the flow rate is greater than 3.0℃ / min, it indicates that the compressor discharge temperature is rising rapidly. The controller can determine the compensation coefficient using the following formula: K = 1 + 0.06 × (Rate) 排气 -3.0), where 0.06 is the temperature rise sensitivity, meaning that for every 1℃ / min increase in the exhaust temperature change rate exceeding the trigger threshold of 3.0℃ / min, the compensation coefficient increases by 0.06, which is equivalent to a 6% increase in the compressor operating frequency relative to the target reference frequency. For example, when Rate 排气 When the temperature is 6.0℃ / min, the compensation coefficient is: K = 1 + 0.06 × (6.0 - 3.0) = 1.18. If the target reference frequency determined based on the electrical box temperature is 40Hz, then the calculated frequency is: F 计算 =40Hz × 1.18 = 47.2Hz; when Rate 排气 When the temperature drops below -3.0℃ / min, it indicates that the compressor discharge temperature is decreasing rapidly. According to K=1-0.05×(|Rate) 排气|-3.0) Determine the compensation coefficient: where 0.05 is the cooling sensitivity, meaning that for every 1℃ / min increase in the exhaust temperature drop beyond the trigger threshold of 3.0℃ / min, the compensation coefficient decreases by 0.05, which means the compressor operating frequency decreases by 5% relative to the target reference frequency. For example, when Rate 排气 When the temperature is -6.0℃ / min, the compensation coefficient is: K = 1 - 0.05 × (6.0 - 3.0) = 0.85; if the target reference frequency determined based on the electrical box temperature is 40Hz, then the calculated frequency is: F 计算 =40Hz × 0.85 = 34Hz.

[0081] In some embodiments, the compensation coefficient may be limited to the range of 0.75 to 1.25. That is, when the calculated compensation coefficient is greater than 1.25, the compensation coefficient is set to 1.25; when the calculated compensation coefficient is less than 0.75, the compensation coefficient is set to 0.75, in order to avoid excessive adjustment of the compressor operating frequency.

[0082] After determining the target frequency, the compressor's operating frequency is gradually changed to the target frequency according to a preset adjustment time. For example, the preset adjustment time is 3 seconds. For instance, if the current operating frequency is 40Hz and the target frequency is 47.2Hz, the frequency adjustment rate is: V=|47.2-40| / 3=2.4Hz / s. The compressor's operating frequency is smoothly changed from 40Hz to 47.2Hz according to the frequency adjustment rate of 2.4Hz / s, thereby avoiding sudden changes in the compressor frequency.

[0083] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0084] This application also provides a control device for a parking air conditioner. It should be noted that the control device for a parking air conditioner in this application can be used to execute the control method for a parking air conditioner provided in this application. This device is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0085] The following describes the control device for the parking air conditioner provided in the embodiments of this application.

[0086] Figure 4This is a schematic diagram of a parking air conditioner control device according to an embodiment of this application. Figure 4 As shown, the device includes:

[0087] The acquisition unit 10 is used to acquire the rate of change of the exhaust temperature of the compressor of the parking air conditioner and the temperature of the electrical box of the parking air conditioner within a preset time period.

[0088] The first determining unit 20 is used to determine a compensation coefficient based on the aforementioned exhaust temperature change rate, wherein the compensation coefficient characterizes the degree of compensation for the operating frequency of the aforementioned compressor.

[0089] The second determining unit 30 is used to determine the target frequency of the compressor based on the temperature of the electrical box and the compensation coefficient, and to control the operation of the parking air conditioner based on the target frequency.

[0090] By acquiring the compressor's exhaust temperature change rate and the electrical box temperature within a preset time period, the device can simultaneously obtain parameters reflecting transient changes in heat load and parameters reflecting the current temperature state. Furthermore, a compensation coefficient is determined based on the exhaust temperature change rate, enabling the compressor's operating frequency to dynamically compensate for changes in the external environment or heat load. Finally, the target compressor frequency is determined based on the electrical box temperature and the compensation coefficient, and the parking air conditioner is controlled accordingly. Therefore, this control device avoids the response lag problem that exists when controlling the compressor frequency solely based on the electrical box temperature, allowing the compressor's operating frequency to adjust promptly in the face of complex external environmental changes, thus improving the control response speed of the parking air conditioner.

[0091] As an optional solution, the first determining unit includes: a first determining module, used to determine that the first absolute value is the absolute value of the exhaust temperature change rate; a second determining module, used to determine that the compensation coefficient is a preset compensation coefficient when the first absolute value is less than or equal to the first preset change rate; and a third determining module, used to determine the compensation coefficient based on the exhaust temperature change rate and the first preset change rate when the first absolute value is greater than the first preset change rate.

[0092] In one optional embodiment, the third determining module comprises: a first determining submodule, configured to determine a first difference as the difference between the exhaust temperature change rate and the first preset change rate when the exhaust temperature change rate is greater than the first preset change rate; a second determining submodule, configured to determine a first product as the product of a first preset sensitivity coefficient and the first difference; a third determining submodule, configured to determine a compensation coefficient as the sum of the first product and a preset constant; a fourth determining submodule, configured to determine a second difference as the difference between the absolute value of the exhaust temperature change rate and the first preset change rate when the exhaust temperature change rate is less than the negative of the first preset change rate; a fifth determining submodule, configured to determine a second product as the product of the second difference and the second preset sensitivity coefficient; and a sixth determining submodule, configured to determine a compensation coefficient as the difference between the preset constant and the second product.

[0093] In another optional scheme, the second determining unit includes: a fourth determining module, used to determine the target reference frequency corresponding to the electrical box temperature according to the electrical box temperature and a preset mapping relationship table, wherein the preset mapping relationship table is a mapping relationship table between the electrical box temperature and the reference frequency; a fifth determining module, used to determine that the calculated frequency is the product of the target reference frequency and the compensation coefficient; and a sixth determining module, used to determine the target frequency according to the calculated frequency.

[0094] In some exemplary embodiments, the sixth determining module includes: a seventh determining submodule, configured to determine the calculated frequency as the target frequency when the calculated frequency is greater than or equal to a preset minimum frequency and less than or equal to a preset maximum frequency; an eighth determining submodule, configured to determine the preset minimum frequency as the target frequency when the calculated frequency is less than the preset minimum frequency; and a ninth determining submodule, configured to determine the preset maximum frequency as the target frequency when the calculated frequency is greater than the preset maximum frequency.

[0095] In some other exemplary embodiments, the second determining unit further includes: an acquisition module, configured to acquire the current operating frequency of the compressor;

[0096] The seventh determining module is used to determine the frequency adjustment rate of the compressor based on the current operating frequency and the target frequency, wherein the frequency adjustment rate characterizes the change range of the operating frequency of the compressor per unit time.

[0097] The control module is used to control the operating frequency of the compressor to change from the current operating frequency to the target frequency based on the frequency adjustment rate mentioned above.

[0098] The aforementioned parking air conditioner control device includes a processor and a memory. The aforementioned acquisition unit, first determination unit, and second determination unit are all stored as program units in the memory. The processor executes these program units stored in the memory to achieve the corresponding functions. All of the aforementioned modules reside in the same processor; alternatively, the aforementioned modules may be located in different processors in any combination.

[0099] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and adjusting kernel parameters can at least address the issue of untimely compressor frequency adjustment in existing backpack-style parking air conditioners under complex external environments.

[0100] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0101] This invention provides a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the parking air conditioner control method.

[0102] Specifically, the control methods for the parking air conditioner include:

[0103] Step S101: Obtain the rate of change of exhaust temperature of the compressor of the parking air conditioner and the temperature of the electrical box of the parking air conditioner within a preset time period.

[0104] Specifically, during the operation of the parking air conditioner, the rate of change of the compressor's exhaust temperature over a preset time period is obtained. The rate of change of exhaust temperature reflects the change of the compressor's exhaust temperature over time, that is, it is used to characterize whether the external environment or heat load of the parking air conditioner is undergoing rapid changes.

[0105] Step S102: Determine the compensation coefficient based on the above-mentioned exhaust temperature change rate. The compensation coefficient represents the degree of compensation for the operating frequency of the above-mentioned compressor.

[0106] Specifically, since the rate of change of exhaust temperature can quickly reflect changes in heat load, determining the compensation coefficient based on the rate of change of exhaust temperature allows the compensation coefficient to change with variations in the external environment or heat load. The compensation coefficient characterizes the degree of compensation for the compressor's operating frequency. When changes in the external environment or heat load are significant, the compensation coefficient can increase or decrease accordingly, thus providing a basis for subsequent correction of the compressor's target frequency.

[0107] Step S103: Determine the target frequency of the compressor based on the temperature of the electrical box and the compensation coefficient, and control the operation of the parking air conditioner based on the target frequency.

[0108] Optionally, determining the compensation coefficient based on the exhaust temperature change rate includes: determining a first absolute value as the absolute value of the exhaust temperature change rate; if the first absolute value is less than or equal to a first preset change rate, determining the compensation coefficient as a preset compensation coefficient; if the first absolute value is greater than the first preset change rate, determining the compensation coefficient based on the exhaust temperature change rate and the first preset change rate.

[0109] Optionally, when the first absolute value is greater than the first preset rate of change, determining the compensation coefficient based on the exhaust temperature change rate and the first preset rate of change includes: when the exhaust temperature change rate is greater than the first preset rate of change, determining a first difference as the difference between the exhaust temperature change rate and the first preset rate of change; determining a first product as the product of a first preset sensitivity coefficient and the first difference; determining the compensation coefficient as the sum of the first product and a preset constant; when the exhaust temperature change rate is less than the negative of the first preset rate of change, determining a second difference as the difference between the absolute value of the exhaust temperature change rate and the first preset rate of change; determining a second product as the product of the second difference and a second preset sensitivity coefficient; and determining the compensation coefficient as the difference between the preset constant and the second product.

[0110] Optionally, determining the target frequency of the compressor based on the electrical box temperature and the compensation coefficient includes: determining the target reference frequency corresponding to the electrical box temperature based on the electrical box temperature and a preset mapping table, wherein the preset mapping table is a mapping table between the electrical box temperature and the reference frequency; determining the calculated frequency as the product of the target reference frequency and the compensation coefficient; and determining the target frequency based on the calculated frequency.

[0111] Optionally, determining the target frequency based on the calculated frequency includes: determining the calculated frequency as the target frequency when the calculated frequency is greater than or equal to a preset minimum frequency and less than or equal to a preset maximum frequency; determining the preset minimum frequency as the target frequency when the calculated frequency is less than the preset minimum frequency; and determining the preset maximum frequency as the target frequency when the calculated frequency is greater than the preset maximum frequency.

[0112] Optionally, controlling the operation of the parking air conditioner according to the target frequency includes: obtaining the current operating frequency of the compressor; determining the frequency adjustment rate of the compressor based on the current operating frequency and the target frequency, wherein the frequency adjustment rate characterizes the change range of the operating frequency of the compressor per unit time; and controlling the operating frequency of the compressor to change from the current operating frequency to the target frequency based on the frequency adjustment rate.

[0113] Optionally, determining the frequency adjustment rate of the compressor based on the current operating frequency and the target frequency includes: determining a third difference as the difference between the target frequency and the current operating frequency; determining a second absolute value as the absolute value of the third difference; and determining the frequency adjustment rate as the ratio of the second absolute value to a preset adjustment duration.

[0114] This invention provides a control system for a parking air conditioner, including one or more processors, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps:

[0115] Step S101: Obtain the rate of change of exhaust temperature of the compressor of the parking air conditioner and the temperature of the electrical box of the parking air conditioner within a preset time period.

[0116] Specifically, during the operation of the parking air conditioner, the rate of change of the compressor's exhaust temperature over a preset time period is obtained. The rate of change of exhaust temperature reflects the change of the compressor's exhaust temperature over time, that is, it is used to characterize whether the external environment or heat load of the parking air conditioner is undergoing rapid changes.

[0117] Step S102: Determine the compensation coefficient based on the above-mentioned exhaust temperature change rate. The compensation coefficient represents the degree of compensation for the operating frequency of the above-mentioned compressor.

[0118] Specifically, since the rate of change of exhaust temperature can quickly reflect changes in heat load, determining the compensation coefficient based on the rate of change of exhaust temperature allows the compensation coefficient to change with variations in the external environment or heat load. The compensation coefficient characterizes the degree of compensation for the compressor's operating frequency. When changes in the external environment or heat load are significant, the compensation coefficient can increase or decrease accordingly, thus providing a basis for subsequent correction of the compressor's target frequency.

[0119] Step S103: Determine the target frequency of the compressor based on the temperature of the electrical box and the compensation coefficient, and control the operation of the parking air conditioner based on the target frequency.

[0120] Optionally, determining the compensation coefficient based on the exhaust temperature change rate includes: determining a first absolute value as the absolute value of the exhaust temperature change rate; if the first absolute value is less than or equal to a first preset change rate, determining the compensation coefficient as a preset compensation coefficient; if the first absolute value is greater than the first preset change rate, determining the compensation coefficient based on the exhaust temperature change rate and the first preset change rate.

[0121] Optionally, when the first absolute value is greater than the first preset rate of change, determining the compensation coefficient based on the exhaust temperature change rate and the first preset rate of change includes: when the exhaust temperature change rate is greater than the first preset rate of change, determining a first difference as the difference between the exhaust temperature change rate and the first preset rate of change; determining a first product as the product of a first preset sensitivity coefficient and the first difference; determining the compensation coefficient as the sum of the first product and a preset constant; when the exhaust temperature change rate is less than the negative of the first preset rate of change, determining a second difference as the difference between the absolute value of the exhaust temperature change rate and the first preset rate of change; determining a second product as the product of the second difference and a second preset sensitivity coefficient; and determining the compensation coefficient as the difference between the preset constant and the second product.

[0122] Optionally, determining the target frequency of the compressor based on the electrical box temperature and the compensation coefficient includes: determining the target reference frequency corresponding to the electrical box temperature based on the electrical box temperature and a preset mapping table, wherein the preset mapping table is a mapping table between the electrical box temperature and the reference frequency; determining the calculated frequency as the product of the target reference frequency and the compensation coefficient; and determining the target frequency based on the calculated frequency.

[0123] Optionally, determining the target frequency based on the calculated frequency includes: determining the calculated frequency as the target frequency when the calculated frequency is greater than or equal to a preset minimum frequency and less than or equal to a preset maximum frequency; determining the preset minimum frequency as the target frequency when the calculated frequency is less than the preset minimum frequency; and determining the preset maximum frequency as the target frequency when the calculated frequency is greater than the preset maximum frequency.

[0124] Optionally, controlling the operation of the parking air conditioner according to the target frequency includes: obtaining the current operating frequency of the compressor; determining the frequency adjustment rate of the compressor based on the current operating frequency and the target frequency, wherein the frequency adjustment rate characterizes the change range of the operating frequency of the compressor per unit time; and controlling the operating frequency of the compressor to change from the current operating frequency to the target frequency based on the frequency adjustment rate.

[0125] Optionally, determining the frequency adjustment rate of the compressor based on the current operating frequency and the target frequency includes: determining a third difference as the difference between the target frequency and the current operating frequency; determining a second absolute value as the absolute value of the third difference; and determining the frequency adjustment rate as the ratio of the second absolute value to a preset adjustment duration.

[0126] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0127] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0128] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0129] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0130] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0131] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0132] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0133] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0134] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0135] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0136] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0137] The parking air conditioner control method of this application obtains the compressor's exhaust temperature change rate within a preset time period and determines a compensation coefficient based on this exhaust temperature change rate. This allows the compressor's target frequency to be dynamically corrected according to the transient heat load changes reflected by the exhaust temperature change rate. Therefore, when the backpack-type parking air conditioner is in complex external environments such as direct sunlight, tunnels, shady areas, or sudden temperature drops, it can proactively compensate for and control the compressor's operating frequency, avoiding untimely compressor frequency adjustment due to lag in the electrical box's temperature response, thereby improving the timeliness of the parking air conditioner's cooling control.

[0138] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for controlling a parking air conditioner, characterized in that, include: The rate of change of the exhaust temperature of the compressor of the parking air conditioner and the temperature of the electrical box of the parking air conditioner are obtained within a preset time period. The compensation coefficient is determined based on the exhaust temperature change rate, and the compensation coefficient characterizes the degree of compensation for the operating frequency of the compressor. The target frequency of the compressor is determined based on the temperature of the electrical box and the compensation coefficient, and the operation of the parking air conditioner is controlled based on the target frequency.

2. The control method according to claim 1, characterized in that, The compensation coefficient is determined based on the exhaust temperature change rate, including: The first absolute value is determined to be the absolute value of the rate of change of the exhaust temperature; If the first absolute value is less than or equal to the first preset rate of change, the compensation coefficient is determined to be the preset compensation coefficient. If the first absolute value is greater than the first preset rate of change, the compensation coefficient is determined based on the exhaust temperature change rate and the first preset rate of change.

3. The control method according to claim 2, characterized in that, When the first absolute value is greater than the first preset rate of change, the compensation coefficient is determined based on the exhaust temperature change rate and the first preset rate of change, including: If the rate of change of exhaust temperature is greater than the first preset rate of change, the first difference is determined to be the difference between the rate of change of exhaust temperature and the first preset rate of change. The first product is determined to be the product of the first preset sensitivity coefficient and the first difference; The compensation coefficient is determined to be the sum of the first product and a preset constant; If the rate of change of exhaust temperature is less than the opposite of the first preset rate of change, the second difference is determined to be the difference between the absolute value of the rate of change of exhaust temperature and the first preset rate of change. The second product is determined to be the product of the second difference and the second preset sensitivity coefficient; The compensation coefficient is determined to be the difference between the preset constant and the second product.

4. The control method according to claim 1, characterized in that, Determining the target frequency of the compressor based on the temperature of the electrical box and the compensation coefficient includes: The target reference frequency corresponding to the temperature of the electrical box is determined according to the temperature of the electrical box and the preset mapping table, wherein the preset mapping table is a mapping table between the temperature of the electrical box and the reference frequency; The calculation frequency is determined to be the product of the target reference frequency and the compensation coefficient; The target frequency is determined based on the calculated frequency.

5. The control method according to claim 4, characterized in that, Determining the target frequency based on the calculated frequency includes: If the calculated frequency is greater than or equal to a preset minimum frequency and less than or equal to a preset maximum frequency, the calculated frequency is determined to be the target frequency. If the calculated frequency is less than the preset minimum frequency, the preset minimum frequency is determined as the target frequency. If the calculated frequency is greater than the preset maximum frequency, the preset maximum frequency is determined as the target frequency.

6. The control method according to claim 1, characterized in that, Controlling the operation of the parking air conditioner according to the target frequency includes: Obtain the current operating frequency of the compressor; The frequency adjustment rate of the compressor is determined based on the current operating frequency and the target frequency, and the frequency adjustment rate characterizes the change range of the operating frequency of the compressor per unit time. The compressor's operating frequency is controlled to change from the current operating frequency to the target frequency based on the frequency adjustment rate.

7. The control method according to claim 6, characterized in that, Determining the compressor's frequency adjustment rate based on the current operating frequency and the target frequency includes: The third difference is determined to be the difference between the target frequency and the current operating frequency; Determine the second absolute value as the absolute value of the third difference; The frequency adjustment rate is determined to be the ratio of the second absolute value to the preset adjustment duration.

8. A control device for a parking air conditioner, characterized in that, include: The acquisition unit is used to acquire the rate of change of the exhaust temperature of the compressor of the parking air conditioner and the temperature of the electrical box of the parking air conditioner within a preset time period. The first determining unit is used to determine a compensation coefficient based on the exhaust temperature change rate, wherein the compensation coefficient characterizes the degree of compensation for the operating frequency of the compressor. The second determining unit is used to determine the target frequency of the compressor based on the temperature of the electrical box and the compensation coefficient, and to control the operation of the parking air conditioner based on the target frequency.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the method according to any one of claims 1 to 7.

10. A control system for a parking air conditioner, characterized in that, include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising methods for performing any one of claims 1 to 7.

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