Radiator and control method, device and temperature control method thereof

Abstract

The present application provides a radiator and its control method, device and temperature control method, wherein the radiator comprises: a housing fixed to the back cover of a mobile device; a temperature sensor installed in the housing for collecting the back cover temperature data of the mobile device; a radio frequency module for sending the back cover temperature data to the mobile device, the radio frequency module is also used to receive pulse width modulation control information from the mobile device, the pulse width modulation control information is obtained by the mobile device according to the back cover temperature data and the CPU temperature data of the mobile device; a driving circuit for generating a driving voltage according to the pulse width modulation control information; a refrigeration component for generating cooling acting on the mobile device using the driving voltage. The radiator and its control method, device and temperature control method of the present application can quickly adjust the heat dissipation power according to the heating state of the mobile phone, thereby reducing safety hazards.

Description

Technical Field

[0001] The present application relates to the field of heat dissipation technology, and in particular to a radiator and a control method, device and temperature control method thereof. Background Art

[0002] At present, mobile devices such as mobile phones and tablets are developing towards high performance and small size. Due to the limitation of the internal space of the mobile phone, the cooling capacity generated by the mobile phone's own cooling system is often not enough to cool the mobile phone. For example, when playing large-scale online games on a mobile phone in a high temperature environment, the heating problem is prominent, which may cause freezing, reduced battery life, and battery spontaneous combustion.

[0003] Therefore, more and more external radiators have appeared on the market. These external radiators usually use fixed gears to manually control the cooling power. Users can only feel the temperature of the phone case by touch and set the cooling gear based on experience, which results in the set cooling power not being able to match the actual heat generation of the phone in time, further causing problems such as excessive noise and condensation inside the phone. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a radiator and a control method, device and temperature control method thereof, which can quickly adjust the heat dissipation power according to the heating state of the mobile device to reduce safety hazards.

[0005] In a first aspect, the present application provides a heat sink, the heat sink comprising:

[0006] A housing, fixed to a back cover of a mobile device;

[0007] A temperature sensor, mounted on the housing, for collecting temperature data of a rear cover of the mobile device;

[0008] A radio frequency module, used to send the back cover temperature data to the mobile device, and the radio frequency module is also used to receive pulse width modulation control information from the mobile device, the pulse width modulation control information is obtained by the mobile device according to the back cover temperature data and the CPU temperature data of the mobile device;

[0009] A driving circuit, generating a driving voltage according to the pulse width modulation control information;

[0010] A refrigeration component utilizes the driving voltage to generate cooling energy for the mobile device.

[0011] In a second aspect, the present application provides a control method for a radiator, which is applied to a mobile device, and the heat dissipation method includes:

[0012] establishing a wireless link with the radiator;

[0013] Acquiring temperature data of a rear cover of the mobile device through the wireless link, wherein the temperature data of the rear cover is collected by a temperature sensor of the radiator;

[0014] Obtaining CPU temperature data of the mobile device;

[0015] Obtaining pulse width modulation control information according to the rear cover temperature data and the CPU temperature data;

[0016] The pulse width modulation control information is sent to the heat sink through the wireless link to control the heat dissipation power of the heat sink.

[0017] In an implementation manner of the second aspect, the wireless link is a Bluetooth link.

[0018] In an implementation of the second aspect, the step of obtaining pulse width modulation control information according to the rear cover temperature data and the CPU temperature data specifically includes:

[0019] Obtaining a corrected measured temperature according to the rear cover temperature data and the CPU temperature data;

[0020] Obtaining a control error according to a preset temperature and the corrected measured temperature;

[0021] According to the control error, a sampling PID algorithm is used to calculate a duty cycle, and the duty cycle is used as the pulse width modulation control information.

[0022] In an implementation of the second aspect, the mobile device is provided with a graphical user interface for a user to set the preset temperature.

[0023] In an implementation manner of the second aspect, the PID algorithm is an incremental PID algorithm, and the initial value of the duty cycle is 30% to 70%.

[0024] In an implementation of the second aspect, obtaining the corrected measured temperature according to the rear cover temperature data and the CPU temperature data specifically includes:

[0025] Multiplying the rear cover temperature data by a first correction coefficient to obtain a first reference temperature;

[0026] Multiplying the CPU temperature data by a second correction coefficient to obtain a second reference temperature;

[0027] The first reference temperature and the second reference temperature are added to obtain the corrected measurement temperature.

[0028] In an implementation manner of the second aspect, the first correction coefficient is 0.8 to 1.2, and the second correction coefficient is 0.2 to 0.7.

[0029] In a third aspect, the present application provides a temperature control method, which is applied between a mobile device and a radiator, wherein the radiator includes a housing, a temperature sensor, a radio frequency module, a drive circuit, and a refrigeration component, wherein the housing is fixed to a back cover of the mobile device, and the temperature sensor is installed on the housing and close to the back cover. The heat dissipation method includes:

[0030] Establishing a wireless link between the radio frequency module and the mobile device;

[0031] The temperature sensor collects temperature data of a rear cover of the mobile device and transmits the temperature data of the rear cover to the radio frequency module;

[0032] The radio frequency module sends the rear cover temperature data to the mobile device via the wireless link;

[0033] The mobile device obtains its own CPU temperature data;

[0034] The mobile device obtains pulse width modulation control information according to the back cover temperature data and the CPU temperature data;

[0035] The mobile device sends the pulse width modulation control information to the radio frequency module via the wireless link;

[0036] The driving circuit generates a driving voltage according to the pulse width modulation control information;

[0037] The cooling component generates cooling energy acting on the mobile device by using the driving voltage.

[0038] In a fourth aspect, the present application provides a control device for a radiator, comprising:

[0039] A first module, used to establish a wireless link with the radiator;

[0040] A second module is used to obtain the temperature data of the back cover of the mobile device through the wireless link, and the temperature data of the back cover is collected by the temperature sensor of the radiator;

[0041] The third module is used to obtain the CPU temperature data of the mobile device;

[0042] A fourth module is used to obtain pulse width modulation control information according to the rear cover temperature data and the CPU temperature data;

[0043] The fifth module is used to send the pulse width modulation control information to the radiator through the wireless link to control the heat dissipation power of the radiator.

[0044] As described above, the radiator and its control method, device and temperature control method described in the present application upload the back cover temperature data to the mobile device through the temperature sensor and the radio frequency module, and obtain the control parameters in the mobile device by combining the back cover temperature data and the CPU temperature data. The radiator then downloads the control parameters to modulate the heat dissipation power in real time. The mobile device provided by the present application can quickly adjust the heat dissipation power according to the heating state of the mobile device to reduce safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 Shown is an application scenario diagram of the radiator control method described in one embodiment of the present application.

[0046] Figure 2 Shown is a flow chart of a method for controlling a radiator described in an embodiment of the present application.

[0047] Figure 3 Display as Figure 2 Specific flow chart of step S400 in FIG.

[0048] Figure 4 Display as Figure 3 Specific flow chart of step S410 in FIG.

[0049] Figure 5 Shown is a flow chart of a temperature control method described in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0051] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0052] like Figure 1 As shown, this embodiment provides a heat sink, which includes a housing, a temperature sensor, a radio frequency module, a driving circuit, and a refrigeration component.

[0053] When in use, the housing is fixed to the back cover of the mobile device. The temperature sensor is installed on the housing to collect the back cover temperature data of the mobile device. The radio frequency module is used to send the back cover temperature data to the mobile device. The radio frequency module is also used to receive pulse width modulation control information from the mobile device. The pulse width modulation control information is obtained by the mobile device based on the back cover temperature data and the CPU temperature data of the mobile device. The drive circuit generates a drive voltage based on the pulse width modulation control information. The refrigeration component uses the drive voltage to generate cooling for the mobile device.

[0054] The mobile device in this embodiment can be a mobile phone, a tablet computer, a laptop computer, a game console, a POS machine, an industrial controller, etc.

[0055] The temperature sensor in this embodiment may be a negative temperature coefficient thermistor, a resistance temperature detector, a semiconductor temperature sensor, or the like.

[0056] The radio frequency module in this embodiment may adopt a transceiver such as Bluetooth, Wi-Fi, ZigBee, etc.

[0057] The cooling component in this embodiment can be a fan or a semiconductor cooling sheet.

[0058] This embodiment enables the mobile device to obtain the temperature information of its back cover in real time by setting a temperature sensor and a radio frequency module in the radiator. On the one hand, the mobile device is cooled as a heat source of the temperature control system, and on the other hand, it is used as the control center of the temperature control system to adjust the heat dissipation power in real time. This embodiment makes full use of the computing resources of the mobile device and realizes more real-time and precise temperature control.

[0059] Among the various existing preliminary intelligent radiators, there are also those that collect the temperature of the back cover as a trigger signal for automatically turning on or off the radiator. This control method is not sophisticated enough and real-time enough, and there are still certain risks. The reason is that the temperature of the back cover is not only affected by the current heat generation of the mobile phone, but also by the ambient temperature. The temperature sensor on the radiator can only collect the temperature on the outside of the back cover, while the main heat source of the mobile phone (such as the CPU) is on the inside of the mobile phone, and the back cover of most mobile phones is made of plastic or glass. It takes a certain amount of time for the temperature of heat sources such as the CPU to be transmitted from the inside of the back cover to the outside of the back cover, resulting in poor real-time performance of temperature closed-loop control based solely on the temperature sensor on the radiator. For example, for a mobile phone running in a low-temperature environment, the temperature detected by the radiator is low, while the actual temperature of the heat source inside the mobile phone may have exceeded the safety standard. The radiator does not start to dissipate heat or the heat dissipation power is low under the wrong guidance of the temperature sensor, which may cause a crash or safety risk.

[0060] In addition to setting a temperature sensor and a radio frequency module in the radiator, this embodiment also collects the CPU temperature of the mobile device, comprehensively considers the temperature data on both sides of the back cover, and issues corresponding pulse width modulation control information to further ensure timely heat dissipation.

[0061] like Figure 2 As shown, this embodiment provides a control method for a radiator, which is applied to a mobile device. The heat dissipation method includes:

[0062] Step S100: establishing a wireless link with a radiator.

[0063] Common portable intelligent mobile devices such as mobile phones have built-in Bluetooth modules. Therefore, a radio frequency module such as Bluetooth can be set in the heat sink to establish a wireless link between the heat sink and the mobile device, such as a Bluetooth link. Specifically, the Bluetooth link uses a GFSK modulation signal.

[0064] The radiator of this embodiment may be powered by an independent power supply, or may be powered by an external power supply connected via a power cord.

[0065] Step S200: acquiring temperature data of a rear cover of a mobile device through a wireless link, wherein the temperature data of the rear cover is acquired by a temperature sensor of a radiator.

[0066] After the radiator is installed on a mobile device such as a mobile phone, the Bluetooth module of the radiator automatically establishes a Bluetooth link with the Bluetooth module of the mobile device, and the temperature sensor periodically uploads the back cover temperature data to the mobile device through the radio frequency module.

[0067] Specifically, the temperature sensor can be installed on the side of the radiator shell close to the back cover of the mobile device. After the radiator is fixed to the mobile device by clamping or magnetic attraction, the temperature sensor directly contacts the back cover of the mobile device or keeps a certain gap between the temperature sensor and the back cover.

[0068] Step S300, obtaining CPU temperature data of the mobile device.

[0069] Usually the CPU of a mobile device has a diode for detecting temperature, so the CPU temperature data can be read directly.

[0070] Step S400, obtaining pulse width modulation control information according to the rear cover temperature data and the CPU temperature data.

[0071] Step S500: sending pulse width modulation control information to the radiator via a wireless link to control the heat dissipation power of the radiator.

[0072] In one embodiment, step S400 specifically includes:

[0073] Step S410, obtaining a corrected measured temperature according to the rear cover temperature data and the CPU temperature data.

[0074] Step S420, obtaining a control error according to the preset temperature and the corrected measured temperature.

[0075] Specifically, the mobile device provides a graphical user interface for the user to set the preset temperature. The user can modify the value of the preset temperature according to the use environment of the mobile device.

[0076] Step S430: Calculate the duty cycle by sampling the PID algorithm according to the control error, and use the duty cycle as the pulse width modulation control information.

[0077] The PID algorithm is a commonly used algorithm in the field of automatic control, which is used to stabilize the actual measured parameters of the control object near the target value. In the existing temperature control system, the temperature of the control target is not greatly affected by the ambient temperature, and the temperature of an actual sampling position can be used as the control target. However, mobile phones have the characteristics of small size, large temperature fluctuations, and great environmental influences. In order to take into account the temperature of the heat source itself and the ambient temperature, this embodiment uses the corrected measured temperature as the control object, so that the control object can not only respond to the temperature fluctuation of the heat source in a timely manner, but also take into account the influence of the ambient temperature on the heat dissipation efficiency, thereby avoiding safety hazards caused by untimely heat dissipation or excessive cooling.

[0078] In one embodiment, the PID algorithm is an incremental PID algorithm, and the initial value of the duty cycle is 30% to 70%.

[0079] The use environment of mobile devices is changeable. Changes in the temperature data of the back cover detected by the temperature sensor may be more caused by changes in the ambient temperature rather than changes in the temperature of the heat source inside the mobile device. In the use scenarios such as large-scale mobile games, the temperature continues to rise over a period of time. This embodiment uses an incremental PID algorithm to effectively filter out the interference caused by different ambient temperatures on temperature control, and can better adjust the temperature according to the continuous heating of the mobile device itself.

[0080] Specifically, the temperatures of the temperature sensor and the CPU are obtained multiple times in a certain period, and multiple continuous corrected measured temperatures and control errors are obtained. The control error gradient, the current control error and the second-order gradient of the control error are further obtained. The duty cycle increment is obtained by multiplying them by the proportional coefficient, the integral coefficient and the differential coefficient respectively. The duty cycle increment is added to the duty cycle of the previous output to obtain the duty cycle of this output.

[0081] like Figure 4 As shown, in one embodiment, step S410 specifically includes:

[0082] Step S411, multiplying the rear cover temperature data by a first correction coefficient to obtain a first reference temperature;

[0083] Step S412, multiplying the CPU temperature data by a second correction coefficient to obtain a second reference temperature;

[0084] Step S413: Add the first reference temperature and the second reference temperature to obtain a corrected measurement temperature.

[0085] Specifically, in one embodiment, the first correction coefficient is 0.8-1.2, and the second correction coefficient is 0.2-0.7.

[0086] like Figure 5 As shown, this embodiment also provides a temperature control method, which is applied between a mobile device and a radiator. The radiator includes a housing, a temperature sensor, a radio frequency module, a drive circuit, and a refrigeration component. The housing is fixed to a back cover of the mobile device. The temperature sensor is installed on the housing and close to the back cover. The heat dissipation method includes:

[0087] Step S001, establishing a wireless link between the radio frequency module and the mobile device;

[0088] Step S002, the temperature sensor collects temperature data of the back cover of the mobile device and transmits the temperature data of the back cover to the radio frequency module;

[0089] Step S003, the radio frequency module sends the back cover temperature data to the mobile device via a wireless link;

[0090] Step S004, the mobile device obtains its own CPU temperature data;

[0091] Step S005, the mobile device obtains pulse width modulation control information according to the back cover temperature data and the CPU temperature data;

[0092] Step S006, the mobile device sends the pulse width modulation control information to the radio frequency module via a wireless link;

[0093] Step S007, the driving circuit generates a driving voltage according to the pulse width modulation control information;

[0094] Step S008: The refrigeration component generates cooling energy for the mobile device using the driving voltage.

[0095] This embodiment also provides a control device for a radiator, comprising:

[0096] A first module is used to establish a wireless link with the radiator;

[0097] The second module is used to obtain the temperature data of the back cover of the mobile device through a wireless link, and the temperature data of the back cover is collected by the temperature sensor of the radiator;

[0098] The third module is used to obtain the CPU temperature data of the mobile device;

[0099] The fourth module is used to obtain pulse width modulation control information according to the back cover temperature data and the CPU temperature data;

[0100] The fifth module is used to send pulse width modulation control information to the heat sink through a wireless link to control the heat dissipation power of the heat sink.

[0101] In the several embodiments provided in the present application, it should be understood that the disclosed system, device or method can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of modules / units is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or units can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules or units, which can be electrical, mechanical or other forms.

[0102] The modules / units described as separate components may or may not be physically separated, and the components displayed as modules / units may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules / units may be selected according to actual needs to achieve the purpose of the embodiments of the present application. For example, the functional modules / units in the various embodiments of the present application may be integrated into one processing module, or each module / unit may exist physically separately, or two or more modules / units may be integrated into one module / unit.

[0103] Those of ordinary skill in the art should further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0104] The descriptions of the processes or structures corresponding to the above-mentioned figures have different emphases. For parts that are not described in detail in a certain process or structure, please refer to the relevant descriptions of other processes or structures.

[0105] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A radiator, characterized in that: The radiator comprises: A housing, fixed to a back cover of a mobile device; A temperature sensor, mounted on the housing, for collecting temperature data of a rear cover of the mobile device; A radio frequency module, used for sending the back cover temperature data to the mobile device, and the radio frequency module is also used for receiving pulse width modulation control information from the mobile device, wherein the pulse width modulation control information is obtained by the mobile device according to the back cover temperature data and the CPU temperature data of the mobile device, including: multiplying the back cover temperature data by a first correction coefficient to obtain a first reference temperature; multiplying the CPU temperature data by a second correction coefficient to obtain a second reference temperature; adding the first reference temperature and the second reference temperature to obtain a corrected measurement temperature; obtaining a control error according to a preset temperature and the corrected measurement temperature; and calculating a duty cycle by a sampling PID algorithm according to the control error, and using the duty cycle as the pulse width modulation control information; A driving circuit, generating a driving voltage according to the pulse width modulation control information; A refrigeration component utilizes the driving voltage to generate cooling energy for the mobile device.

2. A radiator control method, applied to a mobile device, characterized in that: The control method comprises: Establishing a wireless link with the radiator; after the radiator is installed on the mobile device, the back cover temperature data is periodically uploaded to the mobile device through the radio frequency module; Acquiring temperature data of a rear cover of the mobile device through the wireless link, wherein the temperature data of the rear cover is collected by a temperature sensor of the radiator; Obtaining CPU temperature data of the mobile device; Obtaining pulse width modulation control information according to the rear cover temperature data and the CPU temperature data; The pulse width modulation control information is sent to the radiator through the wireless link to control the heat dissipation power of the radiator; wherein, the pulse width modulation control information is obtained according to the back cover temperature data and the CPU temperature data, including: multiplying the back cover temperature data by a first correction coefficient to obtain a first reference temperature; multiplying the CPU temperature data by a second correction coefficient to obtain a second reference temperature; adding the first reference temperature and the second reference temperature to obtain a corrected measured temperature; obtaining a control error according to a preset temperature and the corrected measured temperature; and calculating a duty cycle using a sampling PID algorithm according to the control error, and using the duty cycle as the pulse width modulation control information.

3. The control method of the radiator according to claim 2, characterized in that: The wireless link is a Bluetooth link.

4. The control method of the radiator according to claim 3, characterized in that: The mobile device is provided with a graphical user interface for a user to set the preset temperature.

5. The control method of the radiator according to claim 4, characterized in that: The PID algorithm is an incremental PID algorithm, and the initial value of the duty cycle is 30% to 70%.

6. The control method of the radiator according to claim 2, characterized in that: The first correction coefficient is 0.8-1.2, and the second correction coefficient is 0.2-0.

7.

7. A temperature control method, applied between a mobile device and a radiator, characterized in that: The radiator includes a housing, a temperature sensor, a radio frequency module, a driving circuit and a refrigeration component. The housing is fixed to a back cover of a mobile device. The temperature sensor is installed on the housing and close to the back cover. The temperature control method includes: Establishing a wireless link between the radio frequency module and the mobile device; The temperature sensor collects temperature data of a rear cover of the mobile device and transmits the temperature data of the rear cover to the radio frequency module; The radio frequency module sends the rear cover temperature data to the mobile device via the wireless link; The mobile device obtains its own CPU temperature data; The mobile device obtains pulse width modulation control information according to the back cover temperature data and the CPU temperature data; The mobile device sends the pulse width modulation control information to the radio frequency module via the wireless link; The driving circuit generates a driving voltage according to the pulse width modulation control information; The refrigeration component generates cooling energy acting on the mobile device using the driving voltage; Among them, the pulse width modulation control information is obtained according to the back cover temperature data and the CPU temperature data, including: multiplying the back cover temperature data by a first correction coefficient to obtain a first reference temperature; multiplying the CPU temperature data by a second correction coefficient to obtain a second reference temperature; adding the first reference temperature and the second reference temperature to obtain a corrected measurement temperature; obtaining a control error according to a preset temperature and the corrected measurement temperature; and calculating a duty cycle by a sampling PID algorithm according to the control error, and taking the duty cycle as the pulse width modulation control information.

8. A control device for a radiator, characterized in that: include: The first module is used to establish a wireless link with the radiator; after the radiator is installed on the mobile device, the back cover temperature data is periodically uploaded to the mobile device through the radio frequency module; A second module is used to obtain the temperature data of the back cover of the mobile device through the wireless link, and the temperature data of the back cover is collected by the temperature sensor of the radiator; The third module is used to obtain the CPU temperature data of the mobile device; A fourth module is used to obtain pulse width modulation control information according to the rear cover temperature data and the CPU temperature data; A fifth module is used to send the pulse width modulation control information to the radiator through the wireless link, To control the heat dissipation power of the radiator; wherein, the pulse width modulation control information is obtained according to the back cover temperature data and the CPU temperature data, including: multiplying the back cover temperature data by a first correction coefficient to obtain a first reference temperature; multiplying the CPU temperature data by a second correction coefficient to obtain a second reference temperature; adding the first reference temperature and the second reference temperature to obtain a corrected measured temperature; obtaining a control error according to a preset temperature and the corrected measured temperature; and calculating a duty cycle using a sampling PID algorithm according to the control error, and using the duty cycle as the pulse width modulation control information.

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