KR102591135B1 - Overheating protecting method for core of vehicle heater and module thereof - Google Patents

Abstract

The core temperature overheating protection method of a vehicle heating heater (High Voltage PTC Heater) including an MCU (Micro Controller Unit) according to an embodiment of the present invention is (a) the temperature at which the MCU controls the operation of the core. determining whether the overheating protection signal (Flag) is in the ON state; (b) if the overtemperature protection signal is in the ON state as a result of the determination in step (a), the MCU stopping operation of the core; (c) determining whether a predetermined time pre-entered in the first table has elapsed since the MCU stopped operation of the core; and (d) determining whether the preset predetermined time elapses as a result of step (c). When elapsed, the MCU turns off the overtemperature protection signal.

Description

Core temperature overheating protection method and overheating protection module of vehicle heating heater {OVERHEATING PROTECTING METHOD FOR CORE OF VEHICLE HEATER AND MODULE THEREOF}

The present invention relates to a core temperature overheating protection method and an overheating protection module for a vehicle heater. More specifically, it relates to a core temperature protection method and an overheating protection module for a vehicle heater that can reduce costs and simplify the manufacturing process by eliminating the temperature sensor and increase output by increasing the size of the core.

Car heating heaters (High Voltage PTC Heaters) have a separate overheating protection function to prevent the core temperature from rising excessively, while conventional car heating heaters install a separate temperature sensor on the side of the body to prevent the core temperature from rising too much. When the first temperature (e.g., about 140°C) or higher is sensed, the heater operation is stopped, and when it is cooled after stopping and is sensed below the second temperature (e.g., about 130°C), the heater operation is restarted. The goal was to prevent fire and deformation of the entire vehicle heating heater due to core heat generation by operating the system.

However, since these conventional vehicle heaters necessarily include a temperature sensor, they take up the area of the core and reduce the output, and since the temperature sensor is installed at the PIN away from the heating element ROD, it is greatly affected by the external environment, reducing the accuracy of sensing. There is a problem that is lowered.

In addition, even if the operation of the heater is stopped at the first temperature, the phenomenon of hunting to a temperature exceeding the first temperature occurs due to conduction heat, which inevitably causes deformation of the vehicle heating heater, and the temperature sensor and wires, connectors, etc. therefor. In addition to the problem of increased manufacturing costs because they must be installed together, there is a problem that the size of the PCB increases due to the installation of the connector, increasing the size of the entire vehicle heating heater.

These problems with conventional vehicle heaters result from a structure in which a separate temperature sensor has to be installed, so a solution to this problem is required, and the present invention relates to this.

Republic of Korea Patent Publication No. 10-2017-0078700 (2017.07.07)

The technical problem to be solved by the present invention is a method of protecting the core temperature of a vehicle heater from overheating, which eliminates a separate temperature sensor in a conventional vehicle heater, but can prevent fire and deformation of the entire vehicle heater due to core heat. and providing an overheating protection module.

Another technical problem that the present invention aims to solve is an increase in output due to an increase in the size of the core by removing a separate temperature sensor, a decrease in manufacturing costs due to the removal of the temperature sensor and its wires, connectors, etc., and a reduction in the PCB due to the removal of the connector. The aim is to provide a core temperature overheating protection method and an overheating protection module for a vehicle heating heater that can reduce the size of the entire vehicle heating heater through size reduction.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

A method of protecting the core temperature of a high voltage PTC heater including an MCU (Micro Controller Unit) according to an embodiment of the present invention to achieve the above technical problem is (a) the MCU is determining whether the overtemperature protection signal (Flag) that controls the operation of the core is in the ON state; (b) if the overtemperature protection signal is in the ON state as a result of the determination in step (a), the MCU stopping the operation of the core, (c) determining whether a predetermined time previously entered in the first table has elapsed since the MCU stopped the operation of the core, and (d) the determination result of step (c) When the preset time elapses, the MCU turns off the overheating protection signal.

According to one embodiment, the first table may contain inputs of a reference temperature at which operation of the core is stopped, a plurality of temperatures below the reference temperature, and the time required to reach each of the plurality of temperatures from the reference temperature. there is.

According to one embodiment, in the first table, the reference temperature, a plurality of temperatures, and the time required may be individually input for the driver's seat side core and the passenger seat side core.

A method of protecting the core temperature of a high voltage PTC heater including an MCU (Micro Controller Unit) according to an embodiment of the present invention to achieve the above technical problem is (a') the MCU is Determining whether the temperature overheating protection signal (Flag) that controls the operation of the core is in the ON state; (b`) If, as a result of the determination in step (a`), the overtemperature protection signal for the core is in the OFF state; , the MCU maintains the operation of the core, (c') the MCU measures the voltage and current of the core to calculate the core Assy resistance value, and matches the voltage and core Assy resistance value to a second table. calculating the temperature of the core, (d') the MCU determining whether the calculated temperature of the core exceeds a preset temperature overheating protection signal ON reference temperature, and (e') the (d') If, as a result of the conclusion of the step, the calculated core temperature exceeds a preset temperature overheating protection signal (Flag) ON reference temperature, the MCU includes a step of turning on the overtemperature protection signal (Flag).

According to one embodiment, in step (c'), (c-1') measures and stores the current value flowing through the core for a predetermined time, and counts n the number of measurements of the measured current value (n is a positive value). (c-2') measuring and storing the voltage applied to the core during the predetermined time, and (c-3') a PWM control signal in which the stored number of measurements is input to the core. It may further include determining whether the period of is less than a first value divided by the predetermined time.

According to one embodiment, if the number of stored measurements is less than the first value as a result of the determination in step (c-3′), (c-4′) determining whether the measured current value exceeds 0 and (c-5`) If the measured current value exceeds 0 as a result of the judgment in step (c-4`), 1 is added to the stored measurement number and the method returns to step (c-1`). Additional steps may be included.

According to one embodiment, if the determination result of step (c-3') is that the number of stored measurements is greater than or equal to the first value, (c-6') calculating an average current value according to the number of stored measurements. and (c-7') calculating the Assy resistance value using the calculated average current value and the measured voltage value.

According to one embodiment, (c-8`) may further include the step of initializing the stored number of measurements.

According to one embodiment, the second table in step (c') may have core temperatures input for each of a plurality of core Assy resistance values corresponding to the voltages of the plurality of cores.

According to one embodiment, in step (c'), if the voltage and core Assy resistance values do not exactly match the second table, the temperature of the core may be calculated by applying interpolation.

The core temperature overheating protection module of a vehicle heating heater according to an embodiment of the present invention for achieving the above technical problem includes one or more processors, a network interface, a memory for loading a computer program executed by the processor, and a large capacity network. It includes storage for storing data and the computer program, wherein the computer program determines whether an overheating protection signal (Flag) that controls the operation of the core of the vehicle heating heater (a″) is turned on by the one or more processors. An operation to determine, (b″) an operation to maintain the operation of the core when the overheating protection signal for the core is OFF as a result of the judgment of the operation (a″), (c″) the voltage of the core, An operation to measure the current to calculate the core Assy resistance value and calculate the temperature of the core by matching the voltage and core Assy resistance value to a second table, (d″) the calculated core temperature is a preset temperature An operation to determine whether the overheating protection signal ON standard temperature is exceeded, and (e″) as a result of the termination of the above (d″) operation. If the calculated core temperature exceeds the preset temperature overheating protection signal (Flag) ON standard temperature. , execute the operation to turn on the overtemperature protection signal.

The computer program according to an embodiment of the present invention for achieving the above technical problem is combined with a computing device to (A) determine whether the overheating protection signal (Flag) that controls the operation of the core of the vehicle heating heater is in the ON state. (B) maintaining the operation of the core when the overheating protection signal for the core is OFF as a result of the determination in step (A), (C) measuring the voltage and current of the core Calculating a core assembly resistance value and matching the voltage and core assembly resistance value to a second table to calculate the temperature of the core, (D) the calculated core temperature is based on a preset temperature overheating protection signal ON standard. (E) determining whether the temperature exceeds the temperature; and (E) if the calculated core temperature exceeds the preset temperature overheating protection signal (Flag) ON standard temperature as a result of the termination of step (D), turning on the temperature overheating protection signal. Execute the steps to turn it ON.

According to the present invention as described above, even without installing a separate temperature sensor in the vehicle heater, the time required to reach the re-operable temperature from the cut temperature is already entered in the first table, and whether a predetermined time has elapsed is determined. Since it is enough to determine whether or not it is possible, it has the effect of preventing fires caused by core heat and deformation of the entire vehicle heater.

In addition, since the temperature of the core is already entered in the second table for each of the plurality of core assembly resistance values corresponding to the voltage of the core, the temperature of the core can be calculated without installing a separate temperature sensor, and accordingly, the temperature of the core can be calculated without installing a separate temperature sensor. In addition to increasing the output by increasing the size, the manufacturing cost is reduced by removing the temperature sensor and its wires and connectors, and the PCB size is reduced by removing the connector, which has the effect of reducing the size of the entire vehicle heater.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a diagram showing the overall configuration of a core temperature overheating protection module of a vehicle heater according to a first embodiment of the present invention.
Figure 2 is a flowchart showing representative steps of a method for protecting the core temperature of a vehicle heater from overheating according to a second embodiment of the present invention.
Figure 3 is a diagram illustrating a first table.
Figure 4 is a flowchart illustrating step S260 of the core temperature overheating protection method of a vehicle heater according to the 2-2 embodiment of the present invention.
Figure 5 is a diagram illustrating a second table.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely intended to ensure that the disclosure of the present invention is complete and to provide common knowledge in the technical field to which the present invention pertains. It is provided to fully inform those who have the scope of the invention, and the invention is only determined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Unless otherwise determined, all terms (including technical and scientific terms) used in this specification may be used with meanings that can be commonly understood by those skilled in the art to which the present invention pertains.

Additionally, commonly used, predetermined terms are not to be interpreted ideally or excessively unless clearly specifically determined. The terms used in this specification are for describing embodiments and are not intended to limit the invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context.

As used in the specification, “comprises” and/or “comprising” refers to the presence of one or more other components, steps, operations and/or elements. or does not rule out addition.

Hereinafter, the present invention will be described in more detail with reference to the attached drawings.

Figure 1 is a diagram showing the overall configuration of the core temperature overheating protection module 100 of a vehicle heater according to the first embodiment of the present invention.

However, this is only a preferred embodiment for achieving the purpose of the present invention, and some components may be added or deleted as needed, and of course, the role played by one component may be performed by another component.

The core temperature overheating protection module 100 of a vehicle heater according to the first embodiment of the present invention includes a processor 10, a network interface 20, a memory 30, a storage 40, and a data bus 50 connecting them. ) may include.

The processor 10 controls the overall operation of each component. The processor 10 may be one of a central processing unit (CPU), a micro processor unit (MPU), a micro controller unit (MCU), or a type of processor widely known in the technical field to which the present invention pertains. In addition, the processor 10 may perform operations on at least one application or program to perform the core temperature overheating protection method of a vehicle heater according to the second embodiment of the present invention.

The network interface 20 supports wired and wireless Internet communication for vehicles of the core temperature overheating protection module 100 of the vehicle heating heater according to the first embodiment of the present invention, and may also support other known communication methods. Accordingly, the network interface 20 may be configured to include a corresponding communication module.

The memory 30 stores various data, commands, and/or information, and one or more computer programs 41 are stored from the storage 40 in order to perform the core temperature overheating protection method of the vehicle heater according to the second embodiment of the present invention. ) can be loaded. In FIG. 1, RAM is shown as one of the memories 30, but of course, various storage media can also be used as the memory 30.

Meanwhile, this memory 30 serves as a storage space and can store the first table and second table, which will be described later, and even updates the first table and second table stored through the network interface 20. It can be done.

Storage 40 may non-temporarily store one or more computer programs 41 and large amounts of network data 42. This storage 40 may be non-volatile memory such as ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), flash memory, hard disk, removable disk, or in the technical field to which the present invention pertains. It may be any of the widely known computer-readable recording media.

The computer program 41 is loaded into the memory 30, and one or more processors 10 perform an operation to determine whether the overheating protection signal (Flag) that controls the operation of the core of the (a″) vehicle heating heater is in the ON state. , (b″) an operation to maintain the operation of the core when the overheating protection signal for the core is OFF as a result of the judgment of the operation (a″), (c″) measuring the voltage and current of the core An operation to calculate the core assembly resistance value and calculate the temperature of the core by matching the voltage and core assembly resistance value to a second table, (d″) the calculated core temperature is a preset temperature overheating protection signal An operation to determine whether the ON reference temperature is exceeded, and (e″) and the end result of the (d″) operation. If the calculated core temperature exceeds the preset temperature overheating protection signal (Flag) ON reference temperature, the temperature An operation that turns on the overheating protection signal can be performed.

The operation performed by the computer program 41 briefly mentioned so far can be viewed as a function of the computer program 41, and a more detailed description is provided in the core temperature overheating protection of the vehicle heating heater according to the second embodiment of the present invention. This will be explained later in the description of the method.

The core temperature overheating protection module 100 of the vehicle heating heater according to the first embodiment of the present invention described above can be implemented as an independent configuration included in the vehicle heating heater, and can also be used as a function of the MCU, which is the processor 10. It can be implemented, and in this case, the operation performed by the computer program 41 described above can be viewed as an operation performed by the computer program installed in the MCU.

Hereinafter, a method for protecting the core temperature of a vehicle heater from overheating according to a second embodiment of the present invention will be described in detail.

Figure 2 is a flowchart showing representative steps of a method for protecting the core temperature of a vehicle heater from overheating according to a second embodiment of the present invention.

This corresponds to a preferred flowchart in achieving the purpose of the present invention, but of course, some steps may be added or deleted as needed.

Meanwhile, each step is performed by a computer program included or installed in the core temperature overheating protection module 100 of the vehicle heater according to the first embodiment of the present invention described above, but for convenience of explanation, the first embodiment of the present invention The processor 10 included in the core temperature overheating protection module 100 of the vehicle heater according to the first embodiment is set to the MCU 10, and the description continues on the assumption that the MCU 10 performs the operation.

Hereinafter, a method for protecting the core temperature of a vehicle heater from overheating according to the 2-1 embodiment of the present invention will be described.

The core temperature overheating protection method of a vehicle heater according to the 2-1 embodiment of the present invention includes the upper and right parts of the flowchart shown in FIG. 2.

First, the MCU 10 determines whether the overheating protection signal (Flag) that controls the operation of the core is turned on (S210).

Here, when the temperature overheating protection signal that controls the operation of the core is turned on, it means that the temperature of the core rises high and the overheating protection process must be performed. Conversely, when the temperature overheating protection signal is turned off, it means that the core temperature is high. This means that the overheating protection process does not need to be performed because the temperature does not pose a problem in sustaining the operation of the core.

Meanwhile, the temperature overheating protection signal that controls the core operation is turned on or off depending on the core Assy resistance value, which will be described later. Accordingly, the MCU 10 checks the core Assy resistance value before step S210 and controls the core operation. It may further include a step (S205) of determining whether the overtemperature protection signal is ON, and the core temperature overheat protection method of a vehicle heating heater according to the 2-1 embodiment of the present invention is a method of controlling the operation of the core. It is specified in advance that it is assumed that the protection signal is ON.

As a result of the determination in step S210, if the overtemperature protection signal is ON, the MCU 10 stops the operation of the core (S220).

Here, the MCU 10 stops the operation of the core to prevent fire and deformation of the entire vehicle heater due to core heat that may occur due to additional driving.

This step S220 may further include a step of storing the core Assy resistance value at the point when the MCU 10 stops the operation of the core, which is a predetermined time previously entered using the first table in step S230, which will be described later. This is to determine whether it has elapsed, and the current temperature of the core can be obtained using the second table, which will be described later.

After step S220, the MCU 10 determines whether a predetermined time previously entered in the first table has elapsed since the core operation was stopped (S230).

Here, the first table is exemplarily shown in FIG. 3. Referring to FIG. 3, the first table reaches each of a reference temperature at which the operation of the core stops, a plurality of temperatures below the reference temperature, and a plurality of temperatures from the reference temperature. You can check that the time required has been entered.

Meanwhile, referring to Figure 3, it can be seen that two items, Dr and Ps, are entered separately in relation to the core temperature, which means the driver's side core and the passenger's side core where the vehicle heating heater is installed. Since the temperatures of the driver's side core and the passenger side core are different when the core operation is stopped, Table 1 is used to input the standard temperature, multiple temperatures, and the time required individually.

Hereinafter, apart from the fact that the current temperature of the core can be obtained by using the second table for the core assembly resistance value, Table 1 will be used to explain the predetermined time discussed in step S230.

Referring to FIG. 3, the cut temperature, which is the standard temperature for stopping the operation of the driver's seat core, is entered as 185°C as an example. This means that the temperature of the driver's seat core at the time of stopping the operation of the core is 185°C. , the values entered at 135°C, 130°C, 125°C, 120°C, 115°C, and 110°C below mean the predetermined time required to reach each value at 185°C.

In this case, for example, if the MCU 10 is set to allow the overheated core temperature to reach 130°C, it can be determined whether 167 seconds, which is the time required to reach 130°C from 185°C, has elapsed, and in this case, the predetermined time becomes 167sec. In other words, the predetermined time refers to the time during which the core is naturally cooled.

Here, the predetermined time can be freely set by the designer of the core temperature overheating protection module 100 of the vehicle heater according to the first embodiment of the present invention, but if the predetermined time is set too long, the core may not operate for a long time. Therefore, the vehicle heater itself will not be able to operate, and if the predetermined time is set too short, the core may not be sufficiently cooled. The time required for the core temperature to reach about 130°C is set to a predetermined time. It would be desirable to set it to .

Meanwhile, since the MCU 10 must determine whether a predetermined time previously entered in the first table has elapsed, it includes a separate timer (not shown) to determine when the core operation was stopped and whether a predetermined time has elapsed from that time. You can do it.

As a result of the determination in step S230, if a preset time has elapsed, the MCU 10 turns off the overheating protection signal (S240).

Here, the fact that the MCU 10 turns off the overheating protection signal means that it is possible to restart the core whose operation was stopped in step S220, and can be viewed as a kind of control signal for the core.

So far, the core temperature overheating protection method of the vehicle heater according to the 2-1 embodiment of the present invention has been described. According to the present invention, without installing a separate temperature sensor in the vehicle heater, the time required to reach the re-operable temperature from the cut temperature is already entered in the first table, so it only needs to be determined whether the predetermined time has elapsed. Because it is sufficient, it can prevent fire and deformation of the entire vehicle heating heater due to core heat generation. In addition, by removing a separate temperature sensor, output increases due to an increase in the size of the core, while manufacturing costs are reduced by removing the temperature sensor and its wires and connectors, and the PCB size is reduced by removing the connector, thereby improving the overall vehicle heating heater. It can even be reduced in size.

Meanwhile, although the explanation was withheld earlier, it was said that in step S220, the MCU 10 may further include a step of storing the core Assy resistance value at the time of stopping the operation of the core. This relates to the second table, and Table 2 is related to the core temperature overheating protection method of the vehicle heating heater according to the 2-2 embodiment of the present invention, which will be described below. It will be explained below.

The core temperature overheating protection method of a vehicle heater according to the 2-2 embodiment of the present invention includes the top, middle, and bottom of the flowchart shown in FIG. 2.

First, similar to the core overheating protection method of a vehicle heater according to the 2-1 embodiment of the present invention, the MCU 10 determines whether the overheating protection signal (Flag) that controls the operation of the core is turned on ( S210), if it is in the OFF state as a result of the determination, the MCU 10 maintains the operation of the core (S250).

This represents the opposite case to the core temperature overheating protection method of the vehicle heater according to the 2-1 embodiment of the present invention described above. As described above, the fact that the overtemperature protection signal is OFF means that the core temperature is Since there is no problem in continuing the operation, it means that the overheating protection process does not need to be performed. Accordingly, the core temperature overheating protection method of the vehicle heating heater according to the 2-2 embodiment of the present invention is based on the temperature controlling the operation of the core. Please specify in advance that it is assumed that the overheating protection signal is OFF.

On the other hand, although there is no problem in continuing the core operation because the temperature overheating protection signal is OFF, the temperature of the core may continue to rise due to the maintenance of the core operation in step S250, so be prepared for this. A process will be required, and the corresponding preparation process is the core temperature overheating protection method of the vehicle heating heater according to the 2-2 embodiment of the present invention.

After step S250, the MCU 10 measures the voltage and current of the core to calculate the core Assy resistance value, and calculates the temperature of the core by matching the voltage and core Assy resistance value to the second table (S260).

This step S260 corresponds to a key step in the core temperature overheating protection method of a vehicle heater according to the 2-2 embodiment of the present invention, and will be described in more detail with reference to FIG. 4.

Figure 4 is a flowchart illustrating step S260 in the core temperature overheating protection method of a vehicle heater according to the 2-2 embodiment of the present invention.

First, the MCU 10 measures and stores the current value flowing in the core for a predetermined time, and stores the measurement number of the measured current value as n (n is a positive integer) (S260-1).

Here, the predetermined time refers to the cycle of measuring the current value flowing through the core. For example, it may be 1 msec. When the current value flowing through the core is measured at a cycle of 1 msec, n, which is the number of measurements of the measured current value, is It becomes 1 and can be saved for the first time.

Meanwhile, since the measured current value is a current value measured over a predetermined period of time, the stored current value may be an average current value.

Afterwards, the MCU 10 measures and stores the voltage applied to the core during the same predetermined time (S260-2).

Here, unlike the previous step S260-1, the MCU 10 does not store the number of measurements of the measured voltage value as n. Since the predetermined time is the same, n, which means the number of integrations, is used once in step S260-1. This is because storing it is sufficient, and processing speed can be improved through this.

Additionally, like the current value, the measured voltage value is a voltage value measured over a predetermined period of time, so the stored voltage value may be an average voltage value.

Afterwards, it is determined whether the number of measurements stored in step S260-1 is less than a first value divided by the period of the PWM control signal input to the core by a predetermined time (S260-3).

For example, if the period of the PWM control signal is 200 msec, 200 divided by the predetermined time of 1 msec becomes the first number, and the first number, 200, is compared with 1 stored as n in step S260-1.

As a result of the judgment in step S260-3, if the number of stored measurements is less than the first value, it is determined whether the measured current value exceeds 0 (S260-4), and if the measured current value exceeds 0, the stored measurement Add 1 to the number of times and return to step S260-1 (S260-5).

The reason for determining whether the measured current value exceeds 0 is to check whether current is not flowing in the core, and if the measured current value is 0, it can be considered that an error has occurred in the circuit itself.

On the other hand, when 1 is added to the specific number stored according to step S260-5, the 1 described above becomes 2 by adding 1, and the current value and voltage value are measured again and the saved measurement number 2 and PWM The first number, 200, which is the period of the control signal divided by a predetermined time, is compared.

Accordingly, steps S260-1 to S260-5 described above are repeated until the number of stored measurements reaches 200. When the number of stored measurements reaches 200, the number of stored measurements becomes more than the first value, so S260 -You will move on to step 6.

Meanwhile, if the steps S260-1 to S260-5 described above are repeated until the number of stored measurements exceeds the first value, only steps S260-1 to S260-5 are performed if the MCU 10 is a single processor. Since there is no choice but to do so, other assigned processes cannot be performed. In this case, rather than configuring step S260-6 to return to step S260-1, the process itself can be configured to terminate, and the number of saves measured accordingly can be configured to be terminated. It can be configured so that 1 is added and a new operation can be performed from step S210.

On the other hand, if the MCU 10 is a parallel processor, there is no problem in performing other processes assigned while performing steps S260-1 to S260-5, so the previous description can be followed.

As a result of the judgment in step S260-3, if the number of stored measurements is greater than the first value, the average current value is calculated according to the number of stored measurements (S260-6), and the calculated average current value and measured voltage value are used. This calculates the core assembly resistance value (S260-7).

Here, the core Assy resistance value can be calculated according to Ohm's law, and a step (S260-8) of initializing the number of measurements stored after step S260-7 can be further performed, so that the core Assy resistance This is to ensure that the conditions for calculating the value are met and the subsequent process starts from the beginning again.

If the core assembly resistance value is calculated, the MCU 10 calculates the temperature of the core by matching the voltage and core assembly resistance value to the second table (S260-9). The second table is shown in FIG. 5 as an example. I put it.

Referring to FIG. 5, the second table can confirm that the core temperature is input for each of the plurality of core Assy resistance values corresponding to the voltage of the plurality of cores, and the voltage value measured and stored in step S260-2 The temperature of the core can be obtained by matching the core Assy resistance value calculated in step S260-8. For example, if the core voltage is 240V and the core assembly resistance value is 115Ω, the core temperature is 180℃.

Meanwhile, the second table shown in FIG. 5 corresponds to an exemplary embodiment of the second table. Of course, the input voltage value, core Assy resistance value, and core temperature can be configured differently from this. The voltage value and core assembly resistance value may not exactly match the second table, and in this case, the core temperature can be calculated by applying a known interpolation method.

Let us return to the description of FIG. 2 again.

If the core temperature is calculated according to step S260, it is determined whether the core temperature calculated by the MCU 10 exceeds the preset overheating protection signal ON reference temperature (S270).

Here, the temperature overheating protection signal ON reference temperature is the reference temperature for turning the temperature overheating protection signal ON or OFF according to the core assembly resistance value described above. Core temperature overheating protection method of a vehicle heater according to the 2-1 embodiment of the present invention. It may be the cut temperature mentioned in the description of step S230, and if the core temperature exceeds the temperature overheating protection signal ON reference temperature, the MCU 10 determines that the core is overheated and turns on the overtemperature protection signal. (S280).

If the core is overheated according to the core temperature overheating protection method of the vehicle heater according to the 2-2 embodiment of the present invention described above, the overtemperature protection signal may be turned on, and the entire process is restarted accordingly, S210 In step 2-1, the core temperature overheating protection method of the vehicle heater according to the 2-1 embodiment of the present invention can be performed, and the core can be cooled to prevent overheating. That is, in the core temperature overheating protection method of the vehicle heating heater according to the 2-1 embodiment of the present invention and the core temperature overheating protection method of the vehicle heating heater according to the 2-2 embodiment of the present invention, one embodiment must come first. Rather than something that must be performed, it can be seen as something that is performed in conjunction with each other.

If this is explained as an example in the case where the vehicle heating heater is first turned on, since it is first turned on, the overheating protection signal will be in an OFF state, and accordingly, the vehicle heating heater according to the 2-2 embodiment of the present invention will be in an OFF state. Core temperature overheating protection method will be implemented. In this case, the operation of the core will be maintained according to step S250, and as the core temperature overheating protection method of the vehicle heating heater according to the 2-2 embodiment of the present invention is repeatedly performed, the core temperature will increase, and the core temperature will increase. After the temperature overheating protection signal is turned on by exceeding the set temperature overheating protection signal ON reference temperature, the core temperature overheating protection method of the vehicle heating heater according to the 2-1 embodiment of the present invention is performed to cool the core. You will be able to.

So far, the core temperature overheating protection method of the vehicle heater according to the 2-2 embodiment of the present invention has been described. According to the present invention, the temperature of the core for each of the plurality of core assembly resistance values corresponding to the voltage of the core is already entered in the second table, so the temperature of the core can be calculated without installing a separate temperature sensor. Accordingly, the output increases by increasing the size of the core, and at the same time, the manufacturing cost is reduced by removing the temperature sensor and its wires and connectors, and the size of the entire vehicle heating heater can be reduced by reducing the PCB size by removing the connector.

Meanwhile, as briefly mentioned above, when the MCU 10 is a parallel processor, other processes assigned to the MCU 10 are performed while performing the core temperature overheating protection method of the vehicle heater according to the 2-2 embodiment of the present invention. There will be no problem, and furthermore, the cooling process of the core on the driver's seat and the cooling process on the core on the passenger's seat described in step S230 are performed simultaneously and individually according to the core temperature overheating protection method of the vehicle heating heater according to the 2-1 embodiment of the present invention. You might be able to do it.

Meanwhile, the core temperature overheating protection module 100 of the vehicle heating heater according to the first embodiment of the present invention and the core temperature overheating protection method of the vehicle heating heater according to the second embodiment of the present invention include the same technical features. It can also be implemented with a computer program stored in a medium according to the third embodiment of the invention. In this case, the computer program stored in the medium is combined with the computing device, (A) determining whether the overheating protection signal (Flag) that controls the operation of the core of the vehicle heating heater is turned on, (B) (A) above As a result of the determination of the step, if the overheating protection signal for the core is OFF, maintaining the operation of the core, (C) measuring the voltage and current of the core to calculate the core Assy resistance value, and and calculating the temperature of the core by matching the core assembly resistance value to a second table, (D) determining whether the calculated temperature of the core exceeds a preset temperature overheating protection signal ON reference temperature, and (E ) If the calculated core temperature as a result of the termination in step (D) exceeds the preset temperature overheating protection signal (Flag) ON reference temperature, the step of turning on the overtemperature protection signal (Flag) may be executed.

In addition, although not described in detail for redundant description, the core temperature overheating protection module 100 of the vehicle heater according to the first embodiment of the present invention and the computer program stored in the medium according to the third embodiment of the present invention are consistent with the present invention. Of course, all technical features and effects applied to the core temperature overheating protection method of a vehicle heater according to the second embodiment can be shared.

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. You will be able to understand it. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive.

10: processor
20: network interface
30: memory
40: storage
41: computer program
50: data bus
100: Core temperature overheating protection module of vehicle heating heater

Claims (12)

delete delete delete In the core temperature overheating protection method of a vehicle heater including an MCU (Micro Controller Unit),
(a`) the MCU determining whether an overheating protection signal (Flag) that controls the operation of the core is turned on;
(b`) when, as a result of the determination in step (a`), the overheating protection signal for the core is OFF, the MCU maintains the operation of the core;
(c`) the MCU measures the voltage and current of the core to calculate a core Assy resistance value, and calculates the temperature of the core by matching the voltage and core Assy resistance value to a second table;
(d`) determining, by the MCU, whether the calculated core temperature exceeds a preset temperature overheating protection signal ON reference temperature; and
(e`) If the calculated core temperature as a result of the termination in step (d`) exceeds the preset temperature overheating protection signal (Flag) ON reference temperature, the MCU turns on the overheating protection signal (Flag). ;
Including,
In step (c`),
(c-1`) measuring and storing the current value flowing through the core for a predetermined period of time, and storing the number of measurements of the measured current value as n (n is a positive integer);
(c-2`) measuring and storing the voltage applied to the core during the predetermined time; and
(c-3`) determining whether the stored number of measurements is less than a first value;
A method for protecting core temperature overheating of a vehicle heating heater further comprising: According to paragraph 4,
The first numerical value in step (c-3') is a value obtained by dividing the period of the PWM control signal input to the core by the predetermined time. According to clause 4 or 5,
If, as a result of the determination in step (c-3`), the number of stored measurements is less than the first value,
(c-4`) determining whether the measured current value exceeds 0; and
(c-5`) If the measured current value exceeds 0 as a result of the judgment in step (c-4`), 1 is added to the stored measurement number and the method returns to step (c-1`). step;
A method for protecting core temperature overheating of a vehicle heating heater further comprising: According to clause 4 or 5,
If, as a result of the determination in step (c-3`), the number of stored measurements is greater than or equal to the first value,
(c-6`) calculating an average current value according to the number of stored measurements; and
(c-7`) calculating the Assy resistance value using the calculated average current value and the measured voltage value;
A method for protecting core temperature overheating of a vehicle heating heater further comprising: In clause 7,
After step (c-7`) above,
(c-8`) initializing the stored number of measurements;
A method for protecting core temperature overheating of a vehicle heating heater further comprising: According to paragraph 4,
The second table in step (c`) is,
The temperature of the core is input for each core assembly resistance value corresponding to the voltage of the plurality of cores,
Core temperature overheating protection method of vehicle heating heater. According to clause 9,
In step (c`),
If the voltage and core Assy resistance values do not exactly match the second table, interpolation is applied to calculate the temperature of the core.
Core temperature overheating protection method of vehicle heating heater. One or more processors;
network interface;
a memory that loads a computer program executed by the processor; and
Including storage for storing large-capacity network data and the computer program,
The computer program is operated by the one or more processors,
(a″) An operation to determine whether the overheating protection signal (Flag), which controls the operation of the core of the vehicle heating heater, is turned on;
(b″) an operation to maintain the operation of the core when the overheating protection signal for the core is OFF as a result of the determination of the operation (a″);
(c″) an operation of calculating the core Assy resistance value by measuring the voltage and current of the core, and calculating the temperature of the core by matching the voltage and core Assy resistance value to a second table;
(d″) An operation to determine whether the calculated core temperature exceeds a preset temperature overheating protection signal ON reference temperature; and
(e″) an operation to turn on the overheating protection signal (Flag) when the calculated core temperature as a result of the termination of the (d″) operation exceeds a preset temperature overheating protection signal (Flag) ON reference temperature;
Core temperature overheating protection module of car heating heater running. In combination with a computing device,
(A) determining whether an overheating protection signal (Flag) that controls the operation of the core of the vehicle heating heater is turned on;
(B) maintaining the operation of the core when the overheating protection signal for the core is OFF as a result of the determination in step (A);
(C) calculating the core Assy resistance value by measuring the voltage and current of the core, and calculating the temperature of the core by matching the voltage and core Assy resistance value to a second table;
(D) determining whether the calculated core temperature exceeds a preset temperature overheating protection signal ON reference temperature; and
(E) turning on the overheating protection signal (Flag) when the calculated core temperature as a result of the termination in step (D) exceeds a preset temperature overheating protection signal (Flag) ON reference temperature;
In order to execute,
A computer program stored on media.