CN115056759B

CN115056759B - Air temperature control system, braking device thereof and vehicle

Info

Publication number: CN115056759B
Application number: CN202210771304.2A
Authority: CN
Inventors: 王鑫; 沈建世; 周志强; 吴迪; 汪俊; 涂隆堰; 阮荣刚; 温进俊
Original assignee: Dongfeng Huashen Motor Co Ltd
Current assignee: Dongfeng Huashen Motor Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-07-21
Anticipated expiration: 2042-06-30
Also published as: CN115056759A

Abstract

The invention discloses an air temperature control system, a braking device thereof and a vehicle, wherein the air temperature control system comprises: the air compressor is used for outputting high-temperature high-pressure gas during operation; the high-temperature high-pressure gas output by the air compressor passes through the cavity, a temperature sensor, a heating wire and an electric control water drain valve are arranged in the cavity, and the electric control water drain valve controls the conduction and closing of the cavity and the atmosphere; the heating wire is electrified to heat the air in the cavity; the temperature sensor detects the ambient temperature in the cavity and outputs a corresponding electric signal according to the detected temperature value; and the controller is used for controlling the closing or opening of the electric control water drain valve and controlling the heating time of the heating according to the corresponding electric signal output by the temperature sensor. The temperature control process realizes the temperature control of the air in the cavity, effectively avoids icing caused by too low temperature, and reduces the possibility of braking failure.

Description

Air temperature control system, braking device thereof and vehicle

Technical Field

The invention relates to the technical field of automobiles, in particular to an air temperature control system, a braking device thereof and a vehicle.

Background

Currently, the braking system of commercial vehicles adopts pneumatic braking, and the pneumatic braking adopts air source medium as high-pressure air. The air compressor compresses gas in the air and then conveys the compressed gas to the dryer through the high-temperature-resistant metal pipe, the metal pipe cools the compressed gas, the dryer absorbs and cools moisture and impurities in the compressed gas, and the compressed gas is dried, so that a pipeline behind the dryer is kept in a normal temperature state of the dryer.

The new energy vehicle adopts the electric air compressor, and the working time of the air compressor is reduced and the energy consumption is saved through the accurate control of the electric air compressor. However, when the electric air compressor does not work, air in the high-temperature-resistant metal pipe is kept still, water vapor remains, and when the electric air compressor is cooled, the water vapor condenses to block the steel pipe, so that the performance of a braking system is affected. To solve the above problems, it is common practice to use a high performance dryer, such as an inlet molecular sieve to improve water absorption and a blowback structure to improve the life of the molecular sieve. However, these methods cannot dry the metal pipe between the air compressor and the dryer, and the freezing phenomenon of this section of steel pipe cannot be avoided.

Disclosure of Invention

The invention mainly aims to provide an air temperature control system, a braking device thereof and a vehicle, which are used for effectively controlling the air temperature of the braking system of the vehicle, effectively avoiding icing and reducing the possibility of braking faults.

In a first aspect, the present application provides an air temperature control system comprising:

the air compressor is used for outputting high-temperature high-pressure gas during operation;

the high-temperature high-pressure gas output by the air compressor passes through the cavity, a temperature sensor, a heating wire and an electric control water drain valve are arranged in the cavity, and the electric control water drain valve controls the conduction and closing of the cavity and the atmosphere; the heating wire is electrified to heat the air in the cavity; the temperature sensor detects the ambient temperature in the cavity and outputs a corresponding electric signal according to the detected temperature value;

and the controller is used for controlling the closing or opening of the electric control water drain valve and controlling the heating time of the heating according to the corresponding electric signal output by the temperature sensor.

In one possible implementation manner, the system further comprises a timer, when the air compressor stops working, the timer starts to count from the stop working, the duration is marked as T, and the temperature sensor detects that the environmental temperature in the cavity is T', then:

when the temperature T' is more than or equal to 20 ℃, the temperature T is more than or equal to 60min, the controller controls the electric control water drain valve to be opened for 3s, and the timer returns to zero for re-timing;

when the temperature is less than or equal to 5 ℃ and less than or equal to 20 ℃, T is more than or equal to 30min, the controller controls the electric control water drain valve to be opened for 3s, and the timer returns to zero for re-timing;

when T '< 5 ℃, the controller controls the heating wire to be electrified and heated, and when T' > 7 ℃, the controller controls the heating wire to stop working.

In one possible implementation, the temperature sensor detects that the ambient temperature in the cavity is T when the air compressor is operating normally;

when T is more than or equal to 5 ℃, the controller controls the heating wire to be not operated; when T is less than 5 ℃, the controller controls the heating wire to be electrified and heated, and when T is more than 7 ℃, the controller controls the heating wire to stop heating.

In one possible embodiment, the cavity is provided with a gas inlet from which gas enters the cavity and a gas outlet from which gas exits the cavity.

In a possible embodiment, the gas inlet and the gas outlet are arranged at any position of the cavity.

In one possible embodiment, the cavity is an annular pipe cavity, and the temperature sensor, the heating wire and the electrically controlled water drain valve are placed at the lowest level of the annular pipe cavity.

In a possible embodiment, a gas channel is arranged between the gas inlet and the gas outlet, and the gas channel extends from the gas inlet to the highest level of the annular pipe cavity, then to the lowest level of the annular pipe cavity, and finally to the gas outlet.

In one possible embodiment, the system further comprises a dryer that receives the gas output from the chamber and outputs the gas to a reservoir of a vehicle brake system after drying.

In a second aspect, embodiments of the present application also provide a vehicle braking device comprising an air temperature control system according to any one of the preceding first aspects.

In a third aspect, embodiments of the present application further provide a vehicle, which includes the vehicle braking device according to the foregoing second aspect.

The temperature control process realizes the control of the air temperature in the cavity, avoids the phenomenon that the downstream dryer cannot dry the moisture in the air due to the fact that the air temperature is too high, simultaneously avoids the phenomenon that the moisture in the cavity is condensed and blocked due to the fact that the air temperature is too low, and simultaneously eliminates the moisture in the cavity.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of an air temperature control system provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of an air temperature control system according to an embodiment of the present application;

FIG. 3 is a schematic view of a brake device provided in an embodiment of the present application;

FIG. 4 is a schematic illustration of a vehicle provided in an embodiment of the present application;

FIG. 5 is a schematic diagram of a controller according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of a computer readable program medium according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.

When the common new energy vehicle type electronic control air compressor works, the air is compressed by the air compressor and is conveyed to the dryer through the high-temperature-resistant metal pipe, and the dryer dries the air to form high-pressure dry air and conveys the high-pressure dry air to the air storage cylinder for storage. When the electric control drier does not work, part of high-temperature compressed air is reserved in the high-temperature-resistant metal pipe, and the part of gas does not flow. Over time, the temperature of the metal tube and the gas in the metal tube is reduced to room temperature, and water vapor can be separated out in the metal tube in the temperature reduction process and is accumulated to the lower part. If the air compressor is operated again, part of the vapor is not condensed, and the vapor is brought to the dryer to be dried by the dryer in the high-pressure and high-temperature weather generated by the air compressor. If the air compressor works again, the part of water vapor condenses, and the metal pipe is blocked after condensation, the air path is abnormal, and even the air compressor is blocked. Meanwhile, long-term residual water vapor in the pipeline can corrode the inside of the metal pipe, so that the service life of the metal pipe is shortened. For an air brake commercial vehicle, temperature control cannot be performed on air in front of a dryer, and passive cooling is generally performed by radiating heat through a high-temperature-resistant metal pipe. When the external environment is lower than 0 ℃, the moisture in the air can condense to block the pipeline. The air compressor is damaged due to pipeline blockage, and meanwhile, the braking system lacks a high-pressure air source, so that braking failure can be caused, and running safety is reduced.

The air temperature control system can control the air temperature, avoid icing caused by too low temperature and avoid blocking a pipeline.

According to the invention, a new air temperature control system is used for replacing a high-temperature-resistant metal pipe, and the cooling system (a fan, a water tank and a cavity) of the engine is used for cooling high-temperature gas, so that the dryer effect of the dryer is ensured; the circle structure integrated sensor, the heating wire, the water drain valve and the like of the cavity are used for heating air, preventing ice and removing water, so that the ice problem is solved.

Referring to fig. 1, fig. 1 shows an air temperature control system 10 according to the present invention, which includes an air compressor 11, a chamber 12, and a controller 13, wherein:

the air compressor 11 is used for outputting high-temperature and high-pressure gas during operation. The high-temperature high-pressure gas output by the air compressor 11 passes through the cavity 12, a temperature sensor 14, a heating wire 15 and an electric control water drain valve 16 are arranged in the cavity 11, and the electric control water drain valve 15 controls the conduction and closing of the cavity 12 with the atmosphere. The heating wire 15 is powered on to heat the air in the cavity 12. The temperature sensor 13 detects the temperature of the environment in the cavity 12 and outputs a corresponding electrical signal to the controller 13 according to the detected temperature value. The controller 13 controls the closing or opening of the electric control water drain valve 16 and controls whether the heating 14 is electrified or not according to the corresponding electric signal output by the temperature sensor 14 so as to control the heating time.

In order to improve the accuracy of the control effect, the air temperature control system further comprises a timer, when the air compressor 11 stops working, the timer starts to count from the stop working, the duration is marked as T, and the controller 13 adjusts the air temperature according to the following embodiments assuming that the temperature sensor detects the ambient temperature in the cavity to be T', wherein the embodiments are as follows:

when T '< 5 ℃, the controller 13 controls the heating wire 15 to be electrified and heated, and when T' > 7 ℃, the controller 13 controls the heating wire 15 to stop working.

When the air compressor 11 is operating normally, it is assumed that the temperature sensor 14 detects the ambient temperature in the cavity 12 as T:

when T is more than or equal to 5 ℃, the controller 13 controls the heating wire to work; when T is less than 5 ℃, the controller 13 controls the heating wire 15 to be electrically heated, and when T is more than 7 ℃, the controller 13 controls the heating wire 15 to stop heating.

The temperature interval and the time can be divided in other ways according to the need, for example, the external environment temperature is introduced as a control factor, the temperature T interval is divided in more detail, and the like.

As shown in fig. 2, in this embodiment, a gas inlet and a gas outlet may be further disposed on the cavity 12, where gas enters the cavity 12 from the gas inlet, and gas flows out of the cavity 12 from the gas outlet. Preferably, the gas inlet and gas outlet are provided at any location on the outer wall of the chamber 12. Preferably, the chamber 12 is an annular pipe chamber, and the temperature sensor 14, the heater wire 15 and the electrically controlled drain valve 16 are all disposed at the lowest level of the annular pipe chamber. The design has the advantages of ensuring that the water formed by condensing the air in the cavity can be heated and evaporated in time, and preventing icing. A gas channel is arranged between the gas inlet and the gas outlet, and extends from the gas inlet to the highest horizontal point of the annular pipeline cavity, then extends to the lowest horizontal point of the annular pipeline cavity, and finally extends to the gas outlet.

As shown in fig. 2, the air temperature control system further includes a dryer 17, and the dryer 17 receives the air output from the chamber 12, and outputs the dried air to an air reservoir of the vehicle brake system after drying.

In the invention, the cavity is an annular pipeline cavity, the inlet and the outlet are positioned at the middle height position of the pipeline cavity, so that air enters from the inlet and flows around the annular cavity, and the path is as follows: inlet-highest position of pipeline cavity-lowest position of pipeline cavity-outlet. The lowest cavity of the pipeline cavity is larger than the cavity at other positions in space, and a temperature sensor, an electric heating wire and an electric control water drain valve are embedded in the pipeline cavity; the other positions of the pipeline cavity are cylindrical pipelines with uniform diameters. The electric control water drain valve is actually a one-way valve controlled by an electric signal, so that high-pressure gas in the lowest cavity and the atmosphere communication cavity flows to the atmosphere in one way, or the lowest cavity and the atmosphere are isolated. The electric heating wire is controlled by the electric signal to heat the air. The temperature sensor detects the temperature of the lowest part of the cavity and transmits an electric signal to the controller.

The electric air compressor outputs high-temperature high-pressure gas when in operation and does not output when not in operation. The controller identifies and controls the working states of the electric control water drain valve and the electric heating wire according to a programmable program, and acquires information of the temperature sensor. The controller is communicated with the electric air compressor to acquire the working state of the electric air compressor. Not less than

After the vehicle starts, the cooling system works, and the electric air compressor has two working states: and (5) working and non-working.

When the electric air compressor works, the controller obtains the working state of the electric air compressor, identifies the working states of the electric control water drain valve and the electric heating wire, obtains the signals of the temperature sensor, and makes judgment according to a programmable program. Under the default state, the electric control water drain valve is closed (the lowest cavity is isolated from the atmosphere), and the electric heating wire does not work. The high-pressure high-temperature air is subjected to temperature control by a cooling system, mainly for temperature reduction and heat preservation. When the triggering condition A1 is met, the controller outputs a signal to control the electric control water drain valve to be closed (the lowest cavity is isolated from the atmosphere), and the electric heating wire works. The high-pressure high-temperature air is subjected to temperature control, external environment cooling and electric heating wire heating by a cooling system, and the temperature is controlled in a certain range, mainly heating and heat preservation.

When the electric control air compressor does not work, the controller obtains the state of the electric air compressor as the non-working state, identifies the working states of the electric control water drain valve and the electric heating wire, obtains the signals of the temperature sensor, and makes judgment according to a programmable program. At this time, part of high-pressure air is reserved in the annular cavity of the cavity, the part of air does not flow in the cavity to be static, and moisture in the air slowly separates out and gathers at the lowest cavity. Under the default state, the electric control water drain valve is closed (the lowest cavity is isolated from the atmosphere), and the electric heating wire does not work. When the triggering condition B1 is met, the controller outputs a signal to control the electric control water drain valve to be opened (the lowest cavity is communicated with the atmosphere), and the electric heating wire does not work. The high-pressure air flows to the outside atmosphere through the water drain valve, and simultaneously carries the water accumulated in the lowest cavity and flows to the outside atmosphere together. When the triggering condition B2 is met, the controller outputs a signal to control the electric control water drain valve to be closed (the lowest cavity is isolated from the atmosphere), the electric heating wire works to heat the lowest cavity, partial condensed water is melted, when the triggering condition B3 is further met, the controller controls the electric control water drain valve to be opened (the lowest cavity is communicated with the atmosphere), and high-pressure air carries water accumulated in the lowest cavity and flows to the outside atmosphere through the water drain valve.

The air compressor and the dryer have single functions, and the air path is divided into an air compressor-to-dryer pipeline (a high temperature resistant metal pipe) and a dryer-to-air reservoir pipeline, so that the air can only flow from the air compressor to the dryer, and the dryer can only flow to the air reservoir.

Optionally, the factors affecting the writeable program include: the performance of the electric air compressor, the vehicle type using condition, the vehicle type using environment, the whole vehicle energy consumption and the like. For example: the longer the electric control water drain valve or the electric heating wire is started, the better the temperature control and water removal effects are, but the larger the energy consumption is. Meanwhile, the environment where the vehicle type is located is the higher the humidity or the lower the temperature, the longer the electric control water drain valve or the electric heating wire needs to be opened.

When the air compressor works, the temperature sensor detects the temperature as T.

When T is more than or equal to 5 ℃, the electric heating wire does not work.

When T is less than 5 ℃, the trigger condition is started, the electric heating wire works, and when T is more than 7 ℃, the electric heating wire stops working.

When the air compressor is not in operation, the air compressor starts to time T when not in operation, and the temperature sensor detects the temperature as T. The default electrical heater wire is not in operation.

When T is more than or equal to 20 ℃, T is more than or equal to 60min, a trigger condition is started, an electric control single valve is opened for 3s, T is reset to zero, and timing is repeated.

When T is more than or equal to 5 ℃ and less than 20 ℃, T is more than or equal to 30min, a triggering condition is started, an electric control single valve is opened, the time is kept for 3s, and T returns to zero and is re-timed.

As shown in fig. 3, the present invention also provides a vehicle brake device 20, the vehicle brake device 20 including the air temperature control system 10 shown in fig. 1 and 2.

As shown in fig. 4, the present invention also provides a vehicle 30, the vehicle 300 including the vehicle brake device 20 shown in fig. 3.

In a general commercial vehicle, the air temperature control system is arranged at a fan and a water tank, the fan and the water tank cool the engine to keep the engine working normally, and the temperature is controlled at 65-95 ℃ generally, so the temperature at the cavity is kept at 65-95 ℃. Through the cavity structure improvement, the device is provided with a certain containing cavity and an inlet and an outlet, and the temperature adjustment of the fluid can be realized by utilizing the process that the fluid flows into the containing cavity of the cavity from the inlet and flows out from the outlet. In an air brake system, high pressure air is used as a source of braking energy. The high-pressure high-temperature (> 100 ℃) air generated by the air compressor compressed air can be used for temperature adjustment by the cavity. Meanwhile, the functions of gas temperature control, anti-icing, water removal and the like are realized by utilizing the embedded sensor, the heating wire and the water drain valve of the circular structure of the cavity and integrating an external controller.

For the controller 13, an electronic apparatus 500 according to this embodiment of the present invention is described below with reference to fig. 5. The electronic device 500 shown in fig. 5 is merely an example, and should not be construed as limiting the functionality and scope of use of embodiments of the present invention.

As shown in fig. 5, the electronic device 500 is embodied in the form of a general purpose computing device. The components of electronic device 500 may include, but are not limited to: the at least one processing unit 510, the at least one memory unit 520, and a bus 530 connecting the various system components, including the memory unit 520 and the processing unit 510.

Wherein the storage unit stores program code that is executable by the processing unit 510 such that the processing unit 510 performs steps according to various exemplary embodiments of the present invention described in the above-mentioned "example methods" section of the present specification.

The storage unit 520 may include readable media in the form of volatile storage units, such as Random Access Memory (RAM) 521 and/or cache memory 522, and may further include Read Only Memory (ROM) 523.

The storage unit 520 may also include a program/utility 524 having a set (at least one) of program modules 525, such program modules 525 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.

Bus 530 may be one or more of several types of bus structures including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

The electronic device 500 may also communicate with one or more external devices (e.g., keyboard, pointing device, bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 500, and/or any device (e.g., router, modem, etc.) that enables the electronic device 500 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 550. Also, electronic device 500 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 560. As shown, network adapter 560 communicates with other modules of electronic device 500 over bus 530. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 500, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a terminal device, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.

The present invention also provides a computer readable storage medium having stored thereon a program product capable of implementing the method described above in the present specification. In some possible embodiments, the various aspects of the invention may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps according to the various exemplary embodiments of the invention as described in the "exemplary methods" section of this specification, when said program product is run on the terminal device.

Referring to fig. 6, a program product 600 for implementing the above-described method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

The computer readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).

Furthermore, the above-described drawings are only schematic illustrations of processes included in the method according to the exemplary embodiment of the present invention, and are not intended to be limiting. It will be readily appreciated that the processes shown in the above figures do not indicate or limit the temporal order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, among a plurality of modules.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Claims

1. An air temperature control system, comprising:

the controller controls the closing or opening of the electric control water drain valve and controls the heating time of the heating according to the corresponding electric signal output by the temperature sensor;

the air compressor is characterized by further comprising a timer, when the air compressor stops working, the timer starts to count from the stop working, the duration is marked as T, the temperature sensor detects that the ambient temperature in the cavity is T', and then:

when T '< 5 ℃, the controller controls the heating wire to be electrified and heated, and when T' > 7 ℃, the controller controls the heating wire to stop working;

when the air compressor works normally, the temperature sensor detects that the ambient temperature in the cavity is T;

2. The system of claim 1, wherein the chamber is provided with a gas inlet from which gas enters the chamber and a gas outlet from which gas exits the chamber.

3. The system of claim 2, wherein the gas inlet and gas outlet are disposed at any location in the chamber.

4. The system of claim 2, wherein the cavity is an annular duct cavity, and the temperature sensor, heater wire and electrically controlled drain valve are positioned at a lowest level of the annular duct cavity.

5. The system of claim 4, wherein a gas channel is disposed between the gas inlet and the gas outlet, the gas channel extending from the gas inlet to a highest level of the annular duct cavity, to a lowest level of the annular duct cavity, and finally to the gas outlet.

6. The system of claim 4, further comprising a dryer that receives the gas output from the cavity and outputs the gas to a reservoir of a vehicle braking system after drying.

7. A vehicle brake apparatus comprising the air temperature control system according to any one of claims 1 to 6.

8. A vehicle comprising the vehicle brake device according to claim 7.