Detection method, device and equipment of water heating PTC heater and storage medium

Abstract

The embodiment of the invention discloses a detection method, device and equipment for a water heating PTC heater and a storage medium. The detection method comprises the steps that the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time cooling liquid flow of the water heating PTC heater are obtained; the heat release amount of the water heating PTC heater is determined according to the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time cooling liquid flow; the heat efficiency of the water heating PTC heater is determined according to the heat release amount; and determining the working state of the water heating PTC heater according to the heat efficiency. According to the technical scheme, the detection efficiency and accuracy of the water heating PTC heater are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body new energy product testing, and in particular to a detection method, device, equipment and storage medium for a water-heating PTC heater. Background Art

[0002] In low-temperature environments, a vehicle's air conditioning system not only impacts driving comfort but also directly impacts energy consumption and safety. Compared to traditional vehicles, where the heat source for cab heating comes from the engine, and the engine coolant flows through the heater core, the air conditioning fan blows heat into the cab to achieve heating and defrosting. Electric vehicles, on the other hand, rely solely on the power battery to convert electrical energy into thermal energy to meet these needs. In low-temperature environments, the amount of power consumed by electric vehicles' power batteries for heating, ensuring driving comfort, and for defrosting, ensuring visibility, will inevitably have a significant impact on the vehicle's range.

[0003] Currently, electric vehicle heating systems primarily utilize heat pump systems, high-voltage PTC (Positive Temperature Coefficient) heating systems, or a combination of both. However, existing methods for testing and evaluating the heat release capacity and power consumption of water-heating PTC heaters are often affected by connected components such as the air conditioning cabinet or water pump, resulting in low detection efficiency and a lack of accuracy. Summary of the Invention

[0004] The embodiments of the present invention provide a detection method, device, equipment and storage medium for a water-heating PTC heater, thereby improving the detection efficiency and accuracy of the water-heating PTC heater.

[0005] In a first aspect, an embodiment of the present invention provides a method for detecting a water-heating PTC heater, comprising:

[0006] Get the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow of the water heating PTC heater respectively;

[0007] Determine the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time coolant flow rate;

[0008] Determining the thermal efficiency of the water heating PTC heater based on the heat release;

[0009] The operating state of the water-heating PTC heater is determined according to the thermal efficiency.

[0010] Optionally, after respectively obtaining the real-time liquid inlet temperature, real-time liquid outlet temperature, and real-time coolant flow of the water-heating PTC heater, the following steps are included:

[0011] Obtain the preset liquid inlet temperature and preset coolant flow rate;

[0012] The real-time liquid inlet temperature is adjusted according to the preset liquid inlet temperature and the real-time liquid outlet temperature, and the real-time coolant flow rate is adjusted according to the preset coolant flow rate.

[0013] Optionally, determining the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate includes:

[0014] Within a first preset time, respectively determining the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature, and the rate of change of the real-time coolant flow rate;

[0015] When the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature and the rate of change of the real-time coolant flow are all less than a first threshold, the heat release of the water-heating PTC heater is determined based on the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time coolant flow.

[0016] Optionally, when the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature, and the rate of change of the real-time coolant flow rate are all less than a first threshold, determining the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate includes:

[0017] When the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature, and the rate of change of the real-time coolant flow rate are all less than a first threshold, obtaining at least two sets of the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate within a second preset time;

[0018] Determine at least two real-time heat releases according to at least two groups of the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate;

[0019] The heat release amount is determined based on at least two of the real-time heat release amounts.

[0020] Optionally, determining the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate includes:

[0021] Calculating the heat release according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate based on a first calculation formula;

[0022] Wherein, the first calculation formula is:

[0023] Q = C·ρ·W(T2-T1);

[0024] Wherein, Q is the heat release, C is the specific heat capacity of the coolant, W is the real-time coolant flow rate, T1 is the real-time liquid inlet temperature, and T2 is the real-time liquid outlet temperature.

[0025] Optionally, determining the thermal efficiency of the water-heating PTC heater according to the heat release includes:

[0026] Obtaining the operating voltage, operating current and operating time of the water heating PTC heater;

[0027] Determining the input power of the water-heating PTC heater according to the operating voltage, the operating current and the operating duration;

[0028] The thermal efficiency is determined based on the heat release amount and the input electrical energy.

[0029] Optionally, determining the working state of the water-heating PTC heater according to the thermal efficiency includes:

[0030] Obtaining a preset thermal efficiency of the water heating PTC heater;

[0031] If the thermal efficiency is greater than or equal to the preset thermal efficiency, it is determined that the working state of the water-heating PTC heater is normal.

[0032] In a second aspect, an embodiment of the present invention provides a detection device for a water-heating PTC heater, comprising an acquisition module, a heat release determination module, a thermal efficiency determination module, and a processing module;

[0033] The acquisition module is used to respectively acquire the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow of the water heating PTC heater;

[0034] The heat release determination module is used to determine the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time coolant flow rate;

[0035] The thermal efficiency determination module is used to determine the thermal efficiency of the water heating PTC heater according to the heat release;

[0036] The processing module is used to determine the working state of the water-heating PTC heater according to the thermal efficiency.

[0037] In a third aspect, an embodiment of the present invention provides a detection device for a water-heating PTC heater, comprising:

[0038] one or more processors;

[0039] a storage device for storing one or more programs,

[0040] When the one or more programs are executed by the one or more processors, the one or more processors implement the water-heating PTC heater detection method described in any embodiment of the present invention.

[0041] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for detecting a water-heating PTC heater according to any embodiment of the present invention.

[0042] This embodiment obtains the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow of the water-heating PTC heater respectively, and then determines the heat release of the water-heating PTC heater based on the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow, determines the thermal efficiency of the water-heating PTC heater based on the heat release, and then determines the working state of the water-heating PTC heater based on the thermal efficiency, thereby improving the detection efficiency and accuracy of the water-heating PTC heater and avoiding the detection results being affected by components such as the air-conditioning box or water pump connected to the water-heating PTC heater.

[0043] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 This is a schematic structural diagram of a detection system for a water-heating PTC heater provided by an embodiment of the present invention;

[0046] Figure 2 This is a flow chart of a detection method for a water-heating PTC heater provided by an embodiment of the present invention;

[0047] Figure 3 This is a flow chart of another method for detecting a water-heating PTC heater provided by an embodiment of the present invention;

[0048] Figure 4 This is a flow chart of another method for detecting a water-heating PTC heater provided by an embodiment of the present invention;

[0049] Figure 5 This is a flow chart of another method for detecting a water-heating PTC heater provided by an embodiment of the present invention;

[0050] Figure 6 This is a flow chart of another method for detecting a water-heating PTC heater provided by an embodiment of the present invention;

[0051] Figure 7 1 is a schematic structural diagram of a detection device for a water-heating PTC heater provided by an embodiment of the present invention;

[0052] Figure 8 The present invention provides a schematic structural diagram of a detection device for a water-heating PTC heater. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0054] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0055] Figure 1 This is a schematic structural diagram of a detection system for a water-heating PTC heater provided by an embodiment of the present invention; Figure 2 This is a flow chart of a detection method for a water-heating PTC heater provided by an embodiment of the present invention. This embodiment is applicable to testing and evaluating the working status of a water-heating PTC heater. The method can be executed by a detection device for a water-heating PTC heater, which can be implemented in the form of hardware and / or software. Figure 1 As shown, the detection system for the water-heating PTC heater provided in an embodiment of the present invention includes: an inlet temperature sensor 1, a flow sensor 2, a heater 3, a water pump 4, a water tank 5, a cooling radiator 6, an outlet temperature sensor 7, a host computer 8, a power supply 9 and a water-heating PTC heater 10.

[0056] Specifically, the heater 3, water pump 4, water tank 5, cooling radiator 6 and water-heating PTC heater 10 are connected in sequence to form a circulation loop of the coolant. The water tank 5 is used to store the coolant. The water pump 4 draws the coolant from the water tank 5 to push the coolant to flow in the circulation loop. The heater 3 can heat the coolant, and the cooling radiator 6 can cool the coolant. The water-heating PTC heater 10 is a test sample to be tested for its heat release capacity. The conversion of electrical energy to thermal energy is realized through the positive temperature coefficient PTC thermistor material to achieve heating of the coolant. The inlet temperature sensor 1 and flow sensor 2 are both connected between the heater 3 and the liquid inlet of the water-heating PTC heater 10, and are respectively connected to the host computer 1; the outlet temperature sensor 7 and the cooling radiator 6 are both connected between the water tank 5 and the liquid outlet of the water-heating PTC heater 10, and are respectively connected to the host computer 1; the host computer 1 is also connected to the heater 3, water pump 4, and cooling radiator 6 to control the working status of the heater 3, water pump 4, and cooling radiator 6 respectively; the power supply 9 is connected to the water-heating PTC heater 10 to provide working power to the PTC heating element, driving it to generate heat. The water-heating PTC heater detection system composed of the above components can realize the detection and control of the water-heating PTC heater, data collection, and evaluation of the working status.

[0057] like Figure 1 and Figure 2 As shown, the detection method of the water heating PTC heater based on the above structure includes the following steps:

[0058] S110 , respectively obtaining the real-time liquid inlet temperature, real-time liquid outlet temperature, and real-time coolant flow rate of the water-heating PTC heater.

[0059] Specifically, when testing the working state of the water-heating PTC heater to be tested, the coolant can circulate multiple times in the circulation loop formed by the water tank 5-water pump 4-heater 3-water-heating PTC heater 10-cooling radiator 6-water tank 5, that is, the working state of the water-heating PTC heater 10 to be tested can be tested multiple times. A single cycle corresponds to the collection of a set of test data of the water-heating PTC heater 10. The test data may include the real-time inlet liquid temperature obtained by the inlet temperature sensor 1, the real-time outlet liquid temperature obtained by the outlet temperature sensor 7, and the real-time coolant flow obtained by the flow sensor 2. After the test data is obtained in real time, the real-time inlet liquid temperature, real-time outlet liquid temperature and real-time coolant flow are transmitted to the host computer 8, providing an accurate basis for the subsequent determination of the heat release of the water-heating PTC heater 10.

[0060] S120 , determining the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate.

[0061] Specifically, a single cycle involves water pump 4 pumping coolant from water tank 5 and pushing it to heater 3, where it preheats the coolant. The coolant then enters the water-heating PTC heater 10 through its inlet. The real-time inlet temperature captured by inlet temperature sensor 1 represents the initial coolant temperature when the water-heating PTC heater 10 is not operating, while the real-time coolant flow rate captured by flow sensor 2 represents the actual coolant flow rate through the water-heating PTC heater 10. Furthermore, power supply 9 provides operating power to the water-heating PTC heater 10, driving it to generate heat to heat the coolant. The heated coolant then flows out of the outlet of the water-heating PTC heater 10. The real-time outlet temperature captured by outlet temperature sensor 7 represents the final coolant temperature after the water-heating PTC heater 10 is operating. The coolant then flows into radiator 6, which cools the coolant before transferring it back to water tank 5, completing a single operating circuit for the water-heating PTC heater 10. Since the change from the real-time liquid inlet temperature to the real-time liquid outlet temperature is the actual heating effect of the water-heating PTC heater 10 on the coolant after releasing heat, the heat release of the water-heating PTC heater 10 can be determined based on the real-time liquid inlet temperature and the real-time liquid outlet temperature, combined with the real-time coolant flow rate, and the heat output capacity of the water-heating PTC heater 10 can be quantified to intuitively evaluate its heating capacity.

[0062] S130: Determine the thermal efficiency of the water heating PTC heater based on the heat release.

[0063] Specifically, the heat released is the actual working energy used by the water-heating PTC heater 10 to heat the coolant, and the energy actually consumed by the water-heating PTC heater 10 is the total electrical energy provided by the power supply 9. After the upper computer 1 obtains the total electrical energy provided by the power supply 9 to the water-heating PTC heater 10, the thermal efficiency of the water-heating PTC heater 10 is determined based on the heat released and the total electrical energy consumed by the power supply 9 by the water-heating PTC heater 10, thereby characterizing the efficiency of the water-heating PTC heater 10 in converting electrical energy into thermal energy.

[0064] S140: Determine the working state of the water heating PTC heater according to the thermal efficiency.

[0065] Specifically, the thermal efficiency intuitively represents the efficiency of the water-heating PTC heater 10 in converting electrical energy into thermal energy. If the thermal efficiency is low, it means that the proportion of loss due to self-heating or resistive heating is high, the ineffective energy consumption is high, and the working state of the water-heating PTC heater 10 is abnormal; if the thermal efficiency is low, it means that the water-heating PTC heater 10 has a strong energy conversion capability, stable and reliable operation, and the working state of the water-heating PTC heater 10 is normal.

[0066] This embodiment obtains the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow of the water-heating PTC heater respectively, and then determines the heat release of the water-heating PTC heater based on the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow, determines the thermal efficiency of the water-heating PTC heater based on the heat release, and then determines the working state of the water-heating PTC heater based on the thermal efficiency, thereby improving the detection efficiency and accuracy of the water-heating PTC heater and avoiding the detection results being affected by components such as the air-conditioning box or water pump connected to the water-heating PTC heater.

[0067] Based on the above embodiments, Figure 3 This is a flow chart of another method for detecting a water-heating PTC heater provided by an embodiment of the present invention. Figure 3 The detection method of the water heating PTC heater shown in the figure is further described after obtaining the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow of the water heating PTC heater. Figure 1 and Figure 3 As shown, the detection method of the water heating PTC heater includes the following steps:

[0068] S210 , respectively obtaining the real-time liquid inlet temperature, real-time liquid outlet temperature, and real-time coolant flow rate of the water-heating PTC heater.

[0069] S220: Obtain a preset liquid inlet temperature and a preset coolant flow rate.

[0070] Specifically, the host computer 8 obtains the preset liquid inlet temperature and preset coolant flow required for testing the water-heating PTC heater 10 through system settings or user input, that is, provides benchmark operating parameters for testing and establishes standardized conditions for the testing process.

[0071] S230: adjusting the real-time liquid inlet temperature according to the preset liquid inlet temperature and the real-time liquid outlet temperature, and adjusting the real-time coolant flow rate according to the preset coolant flow rate.

[0072] Specifically, after the host computer 8 determines the preset liquid inlet temperature, it combines the currently acquired real-time liquid outlet temperature and uses the difference between the preset liquid inlet temperature and the currently acquired real-time liquid outlet temperature as the adjustment amount to control the heater 3 and / or the cooling radiator 6 to heat and / or cool the coolant, so as to dynamically adjust the real-time liquid inlet temperature at the start of the next detection process, so that the real-time liquid inlet temperature at the start of the next detection is the preset liquid inlet temperature, thereby realizing closed-loop control of the real-time liquid inlet temperature when the water-heating PTC heater 10 is cycled for multiple detections. Similarly, after the host computer 8 determines the preset coolant flow rate, it combines the currently acquired real-time coolant flow rate and uses the difference between the preset coolant flow rate and the currently acquired real-time coolant flow rate as the adjustment amount to control the water pump 4 power or valve opening to adjust the real-time coolant flow rate, so as to dynamically adjust the real-time coolant flow rate at the start of the next detection process, so that the real-time coolant flow rate at the start of the next detection is the preset coolant flow rate, thereby realizing closed-loop control of the real-time coolant flow rate when the water-heating PTC heater 10 is cycled for multiple detections. Through the closed-loop control of "detection-adjustment-re-detection", the interference of the detection loop on the test results is eliminated, ensuring that each detection can provide the water heating PTC heater 10 with constant temperature and constant flow detection conditions, thereby improving the detection accuracy and reliability.

[0073] S240: Determine the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate.

[0074] S250: Determine the thermal efficiency of the water heating PTC heater based on the heat release.

[0075] S260: Determine the working state of the water heating PTC heater according to the thermal efficiency.

[0076] This embodiment obtains a preset liquid inlet temperature and a preset coolant flow rate, and then adjusts the real-time liquid inlet temperature according to the preset liquid inlet temperature and the real-time liquid outlet temperature, and adjusts the real-time coolant flow rate according to the preset coolant flow rate, thereby achieving closed-loop control of the real-time liquid inlet temperature and the real-time coolant flow rate during multiple cyclic detections of the water-heating PTC heater, ensuring that each detection can provide the water-heating PTC heater with constant temperature and constant flow detection conditions, eliminating the interference of the detection loop on the test results, and improving the detection accuracy and reliability.

[0077] Based on the above embodiments, Figure 4 This is a flow chart of another method for detecting a water-heating PTC heater provided by an embodiment of the present invention. Figure 4 The detection method of the water heating PTC heater shown in the figure further explains how to determine the heat release of the water heating PTC heater based on the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow rate. Figure 1 and Figure 4As shown, the detection method of the water heating PTC heater includes the following steps:

[0078] S310: respectively obtain the real-time liquid inlet temperature, real-time liquid outlet temperature, and real-time coolant flow rate of the water-heating PTC heater.

[0079] S320: Within a first preset time, respectively determine the change rate of the real-time liquid inlet temperature, the change rate of the real-time liquid outlet temperature, and the change rate of the real-time coolant flow rate.

[0080] Specifically, within the first preset time, the host computer 8 collects multiple real-time liquid inlet temperatures via the inlet temperature sensor 1 at intervals of a first window time, and determines the rate of change of the real-time liquid inlet temperature within the first window time based on two adjacent real-time liquid inlet temperatures in the collection sequence. The host computer 8 collects multiple real-time liquid outlet temperatures via the outlet temperature sensor 7 at intervals of a first window time, and determines the rate of change of the real-time liquid outlet temperature within the first window time based on two adjacent real-time liquid outlet temperatures in the collection sequence. The host computer 8 collects multiple real-time coolant flow rates via the outlet flow sensor 2 at intervals of a first window time, and determines the rate of change of the real-time coolant flow rate within the first window time based on two adjacent real-time coolant flow rates in the collection sequence. The first preset time can be greater than twice the first window time, so that the host computer 8 can determine the rate of change of at least two real-time liquid inlet temperatures, at least two real-time liquid outlet temperatures, and at least two real-time coolant flow rates within the first preset time.

[0081] Exemplarily, the first preset time can be 30 minutes, the first window time can be 10 seconds, and the upper computer 8 collects the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow rate every 10 seconds, for a total of 30 minutes, and collects a total of 180 real-time liquid inlet temperatures, 180 real-time liquid outlet temperatures and 180 real-time coolant flow rates, thereby determining the change rate of 179 real-time liquid inlet temperatures based on each two adjacent real-time liquid inlet temperatures, determining the change rate of 179 real-time liquid outlet temperatures based on each two adjacent real-time liquid outlet temperatures, and determining the change rate of 179 real-time coolant flow rates based on each two adjacent real-time coolant flow rates.

[0082] S330. When the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature and the rate of change of the real-time coolant flow are all less than the first threshold, the heat release of the water-heating PTC heater is determined according to the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time coolant flow.

[0083] Specifically, based on the closed-loop control of the real-time coolant flow rate during multiple cycles of testing of the water-heating PTC heater 10, each test can provide the water-heating PTC heater 10 with a constant temperature and constant flow test condition, that is, the real-time liquid inlet temperature and real-time coolant flow rate provided to the water-heating PTC heater 10 are the same each time. When the working condition of the water-heating PTC heater 10 to be tested remains unchanged, the heat release to the coolant should also be the same. Therefore, in order to ensure the accuracy of the test, the first threshold value can be the maximum rate of change allowed for the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the coolant flow rate. When the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature, and the rate of change of the real-time coolant flow rate are all less than the first threshold value, it means that within the first preset time, the real-time liquid inlet temperature tends to be stable, ensuring that the water-heating PTC heater 10 is provided with a constant temperature test condition during the test; the real-time coolant flow rate tends to be stable, ensuring that the water-heating PTC heater 10 is provided with a constant flow test condition during the test; the real-time liquid outlet temperature tends to be stable, ensuring that the water-heating PTC heater 10 is in a stable working state during the test. Then, when the detection system enters a steady state, the host computer 8 determines the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time coolant flow, thereby improving the detection accuracy of the heat release.

[0084] Exemplarily, the first threshold value can be 1%. When the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature and the rate of change of the real-time coolant flow are all less than 1% within the first preset time, it indicates that the detection system is in a stable state, and then the heat release of the water-heating PTC heater is determined based on the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time coolant flow.

[0085] S340: Determine the thermal efficiency of the water heating PTC heater based on the heat release.

[0086] S350: Determine the working state of the water heating PTC heater according to the thermal efficiency.

[0087] This embodiment determines the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature, and the rate of change of the real-time coolant flow rate within a first preset time. When the three change rates are all less than a first threshold, the heat release of the water-heating PTC heater is determined based on the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate. This achieves the calculation of the heat release only under steady state, improves the detection accuracy and reliability of the water-heating PTC heater, and avoids detection errors caused by drastic data fluctuations.

[0088] Optionally, when the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature, and the rate of change of the real-time coolant flow rate are all less than a first threshold, determining the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate includes:

[0089] When the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature, and the rate of change of the real-time coolant flow rate are all less than a first threshold, obtaining at least two sets of real-time liquid inlet temperature, real-time liquid outlet temperature, and real-time coolant flow rate within a second preset time;

[0090] Determine at least two real-time heat releases based on at least two sets of real-time liquid inlet temperature, real-time liquid outlet temperature, and real-time coolant flow rate;

[0091] The heat release amount is determined based on at least two real-time heat release amounts.

[0092] Specifically, when the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature and the rate of change of the real-time coolant flow rate are all less than the first threshold value, it indicates that the detection system is in a steady state and there is no drastic fluctuation in the detected data. At this time, steady-state data can be collected, and at least two sets of real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow rate are obtained within the second preset time interval and the second window time, wherein the second preset time is greater than twice the second window time, and then at least two real-time heat releases are determined based on the at least two sets of real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow rate, and then the average of the at least two real-time heat releases is calculated, and the obtained average is the heat release, which reduces the single measurement error and improves the accuracy of the heat release calculation.

[0093] Exemplarily, the second preset time can be 3 minutes, and the second window time can be 10 seconds. Within the first preset time, when the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature, and the rate of change of the real-time coolant flow are all less than the first threshold, the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow are collected every 10 seconds, for a total of 3 minutes, and a total of 18 groups of real-time liquid inlet temperature, real-time liquid outlet temperature, and real-time coolant flow are collected, thereby determining 17 real-time heat release values ​​based on the real-time liquid inlet temperature, real-time liquid outlet temperature, and real-time coolant flow rate of each group, and then averaging the 17 real-time heat release values ​​to obtain the heat release value.

[0094] Optionally, the heat release of the water heating PTC heater is determined based on the real-time liquid inlet temperature, real-time liquid outlet temperature, and real-time coolant flow rate, including:

[0095] Calculate the heat release based on the first calculation formula according to the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time coolant flow rate;

[0096] Among them, the first calculation formula is:

[0097] Q = C·ρ·W(T2-T1);

[0098] Among them, Q is the heat release, C is the specific heat capacity of the coolant, W is the real-time coolant flow rate, T1 is the real-time liquid inlet temperature, and T2 is the real-time liquid outlet temperature.

[0099] Specifically, the real-time inlet temperature T1 represents the coolant temperature before the water-heating PTC heater is activated, and the real-time outlet temperature T2 represents the coolant temperature after the water-heating PTC heater is activated. Therefore, the energy change of the coolant is the heat release of the water-heating PTC heater. The heat release of the water-heating PTC heater can be calculated based on the first calculation formula Q = C·ρ·W(T2-T1). For example, the coolant can be an ethylene glycol aqueous solution.

[0100] Based on the above embodiments, Figure 5 This is a flow chart of another method for detecting a water-heating PTC heater provided by an embodiment of the present invention. Figure 5 The detection method of the water heating PTC heater shown in the figure further explains how to determine the thermal efficiency of the water heating PTC heater based on the heat release. Figure 1 and Figure 5 As shown, the detection method of the water heating PTC heater includes the following steps:

[0101] S410: respectively obtain the real-time liquid inlet temperature, real-time liquid outlet temperature, and real-time coolant flow rate of the water-heating PTC heater.

[0102] S420: Determine the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate.

[0103] S430: Obtain the operating voltage, operating current, and operating time of the water heating PTC heater.

[0104] Specifically, the host computer 8 can use a voltage sensor to measure the voltage across the water-heating PTC heater 10 in real time while it is operating, and use an analog-to-digital conversion module to convert the voltage signal into a digital signal, thereby obtaining the operating voltage of the water-heating PTC heater 10. The host computer 8 can also use a current sensor to detect the current flowing through the water-heating PTC heater 10 in real time, and convert the current signal into a digital signal, thereby obtaining the operating current of the water-heating PTC heater 10. The host computer 8 can also include a timer to record the cumulative operating time of the water-heating PTC heater 10 from the time it starts heating the coolant to the time it stops, thereby obtaining the operating time of the water-heating PTC heater 10.

[0105] S440: Determine the input power of the water-heating PTC heater according to the operating voltage, operating current, and operating time.

[0106] Specifically, the host computer 8 calculates the total electric energy provided by the power supply 9 to the water-heating PTC heater 10 , that is, the input electric energy E of the water-heating PTC heater 10 , based on the obtained working voltage U, working current I and working time t and the formula E=U·I·t.

[0107] S450: Determine thermal efficiency based on heat release and electrical energy input.

[0108] Specifically, the heat release Q is the actual work done by the water-heating PTC heater 10 on the coolant, and the input electrical energy E is the total electrical energy provided by the power supply 9 to the water-heating PTC heater 10. Based on the formula η=Q / E, the efficiency of converting electrical energy into thermal energy, that is, the thermal efficiency η, is calculated.

[0109] S460: Determine the working state of the water heating PTC heater according to the thermal efficiency.

[0110] This embodiment accurately calculates the input power of the water-heating PTC heater by collecting the working voltage, working current and working time of the water-heating PTC heater in real time, and then determines the thermal efficiency of the water-heating PTC heater in combination with the actual heat release of the water-heating PTC heater. This is simple and efficient, and improves the detection efficiency and accuracy of the water-heating PTC heater.

[0111] Based on the above embodiments, Figure 6 This is a flow chart of another method for detecting a water-heating PTC heater provided by an embodiment of the present invention. Figure 6 The detection method of the water heating PTC heater shown in the figure further explains how to determine the working status of the water heating PTC heater based on the thermal efficiency. Figure 1 and Figure 6 As shown, the detection method of the water heating PTC heater includes the following steps:

[0112] S510: respectively obtain the real-time liquid inlet temperature, real-time liquid outlet temperature, and real-time coolant flow rate of the water-heating PTC heater.

[0113] S520: Determine the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate.

[0114] S530: Determine the thermal efficiency of the water heating PTC heater based on the heat release.

[0115] S540: Obtain a preset thermal efficiency of the water heating PTC heater.

[0116] Specifically, the preset thermal efficiency of the water-heating PTC heater 10 is typically obtained through theoretical design values ​​or experimental calibration. This serves as a threshold for determining whether the water-heating PTC heater 10 is a good product. The host computer 8 can obtain the preset thermal efficiency of the water-heating PTC heater 10 based on a table lookup or user input. For example, the preset thermal efficiency can be 90%.

[0117] S550: If the thermal efficiency is greater than or equal to the preset thermal efficiency, it is determined that the working state of the water heating PTC heater is normal.

[0118] Specifically, if the detected thermal efficiency is greater than or equal to the preset thermal efficiency, the water heating PTC heater 10 is a good product, operating normally, and with efficient energy conversion. If the detected thermal efficiency is lower than the preset thermal efficiency, the water heating PTC heater 10 may be defective and may be at risk of performance degradation, heat loss, or failure. Using the preset thermal efficiency as a comparison benchmark provides a basis for the test results of the water heating PTC heater 10, ensuring that the test results of the water heating PTC heater 10 are accurate and reliable.

[0119] This embodiment obtains the preset thermal efficiency of the water-heating PTC heater to provide a comparison basis for the thermal efficiency obtained by detection. If the thermal efficiency is greater than or equal to the preset thermal efficiency, the working state of the water-heating PTC heater is determined to be normal, thereby realizing a rapid judgment on whether the working state of the water-heating PTC heater is normal and improving the detection efficiency and accuracy of the water-heating PTC heater.

[0120] Based on the same inventive concept, Figure 7 FIG. 1 is a schematic diagram of a detection device for a water-heating PTC heater provided by an embodiment of the present invention. Figure 7 As shown, the detection device for the water-heating PTC heater includes: an acquisition module 610, a heat release determination module 620, a thermal efficiency determination module 630 and a processing module 640;

[0121] An acquisition module 610 is used to respectively acquire the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow rate of the water heating PTC heater;

[0122] The heat release determination module 620 is used to determine the heat release of the water heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time coolant flow rate;

[0123] Thermal efficiency determination module 630, for determining the thermal efficiency of the water heating PTC heater according to the heat release;

[0124] The processing module 640 is used to determine the working state of the water heating PTC heater according to the thermal efficiency.

[0125] The detection device for a water-heating PTC heater provided in an embodiment of the present invention can execute the detection method for a water-heating PTC heater provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method, which will not be described in detail here.

[0126] Figure 8A schematic diagram of the structure of a detection device 80 for a water heating PTC heater that can be used to implement an embodiment of the present invention is shown. The detection device for a water heating PTC heater is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The detection device for a water heating PTC heater can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0127] like Figure 8 As shown, the detection device 80 for a water-heating PTC heater includes at least one processor 81, and a memory connected to the at least one processor 81 in communication, such as a read-only memory (ROM) 82, a random access memory (RAM) 83, etc., wherein the memory stores a computer program that can be executed by the at least one processor, and the processor 81 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 82 or the computer program loaded from the storage unit 88 into the random access memory (RAM) 83. Various programs and data required for the operation of the detection device 80 for a water-heating PTC heater can also be stored in the RAM 83. The processor 81, ROM 82, and RAM 83 are connected to each other via a bus 84. An input / output (I / O) interface 85 is also connected to the bus 84.

[0128] Multiple components in the water-heating PTC heater detection device 80 are connected to the I / O interface 85, including: an input unit 86, such as a keyboard, a mouse, etc.; an output unit 87, such as various types of displays, speakers, etc.; a storage unit 88, such as a magnetic disk, an optical disk, etc.; and a communication unit 89, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 89 allows the water-heating PTC heater detection device 80 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0129] The processor 81 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the processor 81 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 81 executes the various methods and processes described above, such as the vehicle runaway detection method.

[0130] In some embodiments, the detection method for a water-heating PTC heater can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 88. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 80 via the ROM 82 and / or the communication unit 89. When the computer program is loaded into the RAM 83 and executed by the processor 81, one or more steps of the detection method for a water-heating PTC heater described above can be performed. Alternatively, in other embodiments, the processor 81 can be configured to execute the detection method for a water-heating PTC heater by any other appropriate means (e.g., by means of firmware).

[0131] Various embodiments of the systems and techniques described above can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0132] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0133] In the context of the present invention, computer-readable storage media can be tangible media that can contain or store a computer program for use with an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Computer-readable storage media can include but are not limited to electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, computer-readable storage media can be machine-readable signal media. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0134] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0135] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0136] A computing system may include clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0137] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0138] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A detection method for a water heating PTC heater, characterized in that: include: Get the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow of the water heating PTC heater respectively; Determine the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time coolant flow rate; Determining the thermal efficiency of the water heating PTC heater based on the heat release; The operating state of the water-heating PTC heater is determined according to the thermal efficiency.

2. The detection method of water heating PTC heater according to claim 1, characterized in that: After obtaining the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow of the water heating PTC heater respectively, it includes: Obtain the preset liquid inlet temperature and preset coolant flow rate; The real-time liquid inlet temperature is adjusted according to the preset liquid inlet temperature and the real-time liquid outlet temperature, and the real-time coolant flow rate is adjusted according to the preset coolant flow rate.

3. The detection method of water heating PTC heater according to claim 1, characterized in that: Determining the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate includes: Within a first preset time, respectively determining the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature, and the rate of change of the real-time coolant flow rate; When the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature and the rate of change of the real-time coolant flow are all less than a first threshold, the heat release of the water-heating PTC heater is determined based on the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time coolant flow.

4. The detection method of a water heating PTC heater according to claim 3, characterized in that: When the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature, and the rate of change of the real-time coolant flow rate are all less than a first threshold, determining the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate, including: When the rate of change of the real-time liquid inlet temperature, the rate of change of the real-time liquid outlet temperature, and the rate of change of the real-time coolant flow rate are all less than a first threshold, obtaining at least two sets of the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate within a second preset time; Determine at least two real-time heat releases according to at least two groups of the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate; The heat release amount is determined based on at least two of the real-time heat release amounts.

5. The detection method of water heating PTC heater according to claim 1, characterized in that: Determining the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate includes: Calculating the heat release according to the real-time liquid inlet temperature, the real-time liquid outlet temperature, and the real-time coolant flow rate based on a first calculation formula; Wherein, the first calculation formula is: Q = C·ρ·W(T2-T1); Wherein, Q is the heat release, C is the specific heat capacity of the coolant, W is the real-time coolant flow rate, T1 is the real-time liquid inlet temperature, and T2 is the real-time liquid outlet temperature.

6. The detection method of water heating PTC heater according to claim 1, characterized in that: Determining the thermal efficiency of the water heating PTC heater according to the heat release includes: Obtaining the operating voltage, operating current and operating time of the water heating PTC heater; Determining the input power of the water-heating PTC heater according to the operating voltage, the operating current and the operating duration; The thermal efficiency is determined based on the heat release amount and the input electrical energy.

7. The detection method of a water heating PTC heater according to claim 1, characterized in that: Determining the working state of the water heating PTC heater according to the thermal efficiency includes: Obtaining a preset thermal efficiency of the water heating PTC heater; If the thermal efficiency is greater than or equal to the preset thermal efficiency, it is determined that the working state of the water-heating PTC heater is normal.

8. A detection device for a water heating PTC heater, characterized in that: It includes an acquisition module, a heat release determination module, a thermal efficiency determination module and a processing module; The acquisition module is used to respectively acquire the real-time liquid inlet temperature, real-time liquid outlet temperature and real-time coolant flow of the water heating PTC heater; The heat release determination module is used to determine the heat release of the water-heating PTC heater according to the real-time liquid inlet temperature, the real-time liquid outlet temperature and the real-time coolant flow rate; The thermal efficiency determination module is used to determine the thermal efficiency of the water heating PTC heater according to the heat release; The processing module is used to determine the working state of the water-heating PTC heater according to the thermal efficiency.

9. A detection device for a water heating PTC heater, characterized in that: include: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the detection method for a water-heating PTC heater according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the detection method for a water-heating PTC heater according to any one of claims 1 to 7 is implemented.

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