Vehicle air conditioning unit control method for tunnels and overhead lines

Abstract

The application provides a vehicle air conditioning unit control method suitable for tunnels and elevated lines, comprising: a vehicle comprising multiple carriages, the carriage comprising an air conditioning unit and an air conditioning control cabinet; after receiving information that the tunnel is about to be exited, the air conditioning control cabinet determines whether the air conditioning unit is running in a cooling mode, a heating mode or a ventilation mode; and the air conditioning control cabinet adjusts the operation mode of the air conditioning unit according to the cooling mode, the heating mode or the ventilation mode, so that the indoor environment temperature of the vehicle is constant after the carriage drives from the tunnel to the elevated line. Through the air conditioning control cabinet adjusting the operation mode of the air conditioning unit according to the cooling mode, the heating mode or the ventilation mode, the indoor environment temperature of the vehicle is constant after the carriage drives from the tunnel to the elevated line, which can avoid air conditioning system failure caused by a single regulation and control mode when the vehicle runs in the tunnel and the elevated line, and can also improve the comfort in the carriage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning unit control of vehicles, in particular, especially relates to a vehicle air conditioning unit control method suitable for tunnels and elevated lines. BACKGROUND

[0002] With the rapid development of subway project construction, the subway is not limited to running in the underground tunnel line, but multiple lines run in the underground tunnel and the ground elevated. The vehicle runs in the tunnel and the elevated line, and the environment of the vehicle, such as sunshine, temperature, humidity, etc., is constantly changing. The air conditioning system for providing comfort to the vehicle compartment needs to be calculated in real time according to the outdoor environment conditions of the vehicle operation and the indoor environment conditions set for the vehicle compartment to adjust the output of the air conditioning system cooling, heating and air volume. Since the vehicle runs in the tunnel and the elevated line, there is a temperature difference between the tunnel and the elevated line, about 8-10℃, and the cross operation of the vehicle in the tunnel and the elevated line will bring certain difficulty to the air conditioning system control scheme.

[0003] The subway vehicle is configured with 2 air conditioning units and 1 air conditioning control cabinet per car. Each air conditioning control cabinet is configured with 1 air conditioning controller, 1 touch screen and electrical components such as contactors and circuit breakers for protection and control. The air conditioning unit adopts variable frequency cooling and heating air conditioning, and the unit controller and frequency converter module in the air conditioning unit are controlled by the air conditioning controller, and data connection and data interaction are established. The air conditioning controller display screen can display the current temperature, working mode and fault information, etc., and can also set the working mode of the air conditioning unit.

[0004] The air conditioning unit has two control modes "central control" and "local control". The "local control" is to realize the independent control of the air conditioning unit of the vehicle through the touch screen of the air conditioning controller carried by the vehicle compartment; and the "central control" is that the air conditioning unit is controlled by the driver's room, and the train control management system (TCMS) sets the air conditioning mode through the train bus to realize the normal operation of the air conditioning.

[0005] Therefore, the present application provides a vehicle air conditioning unit control method suitable for tunnels and elevated lines under the "central control" mode. SUMMARY

[0006] According to the above-mentioned deficiencies, a vehicle air conditioning unit control method suitable for tunnels and elevated lines is provided. The present application mainly utilizes the air conditioning control cabinet to adjust the operation mode of the air conditioning unit according to the cooling mode, the heating mode or the ventilation mode, so that after the car compartment drives from the tunnel to the elevated line, the indoor environment temperature of the vehicle is constant, which can avoid the air conditioning system failure caused by the single regulation mode when the vehicle runs in the tunnel and the elevated line, and also can improve the comfort in the car compartment.

[0007] The technical means adopted by the present application are as follows:

[0008] The application provides a vehicle air conditioning unit control method suitable for tunnels and elevated lines, comprising:

[0009] The vehicle comprises multiple carriages, the carriages comprising air conditioning units and air conditioning control cabinets, after receiving information that the tunnel is about to be exited, the air conditioning control cabinet determines whether the air conditioning unit operates in a cooling mode, a heating mode or a ventilation mode;

[0010] The air conditioning control cabinet adjusts the operation mode of the air conditioning unit according to the cooling mode, the heating mode or the ventilation mode, so that the indoor environment temperature of the vehicle is constant after the carriage drives from the tunnel to the elevated line.

[0011] Further, the air conditioning control cabinet adjusts the operation mode of the air conditioning unit according to the cooling mode, the heating mode or the ventilation mode, comprising:

[0012] When the air conditioning control cabinet determines that the air conditioning unit operates in the cooling mode, the air conditioning control cabinet determines a load adjustment offset;

[0013] The air conditioning control cabinet acquires the outdoor environment temperature of the carriage, and calculates the set temperature in the cooling mode according to the outdoor environment temperature of the carriage and the load adjustment offset;

[0014] The air conditioning control cabinet controls the air conditioning unit to operate according to the set temperature in the cooling mode.

[0015] Further, the air conditioning control cabinet determines the load adjustment offset, comprising:

[0016] When the passenger capacity of the carriage is less than a first threshold, the load adjustment offset is 1K;

[0017] When the passenger capacity of the carriage is greater than or equal to the first threshold and less than or equal to a second threshold, the load adjustment offset is 0;

[0018] When the passenger capacity of the carriage is greater than the second threshold, the load adjustment offset is -1K.

[0019] Further, the air conditioning control cabinet calculates the set temperature in the cooling mode according to the outdoor environment temperature of the carriage and the load adjustment offset, and the calculation is performed in the following manner:

[0020] Ts 制冷 =22℃+0.25×(Toa 车外 -19)℃+ΔK;

[0021] Wherein, Ts 制冷Toa is a set temperature in the refrigeration mode 车外 ΔK is an outdoor environment temperature of the vehicle cabin, and ΔK is a load adjustment offset.

[0022] Further, the air conditioning control cabinet adjusts the operation mode of the air conditioning unit according to the refrigeration mode, the heating mode or the ventilation mode, comprising:

[0023] When the air conditioning control cabinet determines that the air conditioning unit operates in the heating mode, the air conditioning control cabinet determines whether the outdoor environment temperature of the vehicle cabin is less than 5℃;

[0024] If less than 5℃, the air conditioning control cabinet controls the compressor of the air conditioning unit to stop and turn on the electric heating, and switches to the normal heating working mode after 2 minutes of operation;

[0025] If greater than or equal to 5℃, the air conditioning control cabinet controls the air conditioning unit to operate in the normal heating working mode.

[0026] Further, the normal heating working mode comprises:

[0027] When the outdoor environment temperature of the vehicle cabin is greater than or equal to -13℃, if the indoor environment temperature of the vehicle cabin is less than the preset temperature of the vehicle cabin, the frequency of the compressor is controlled, and the air conditioning unit operates according to the preset temperature of the vehicle cabin;

[0028] When the outdoor environment temperature of the vehicle cabin is less than -13℃, if the indoor environment temperature of the vehicle cabin is less than the preset temperature of the vehicle cabin, 2 sets of fresh air preheaters of the air conditioning unit are turned on, when the indoor environment temperature of the vehicle cabin is greater than the preset temperature of the vehicle cabin +1℃, 1 set of the fresh air preheaters is turned off; when the indoor environment temperature of the vehicle cabin is greater than the preset temperature of the vehicle cabin +2℃, 2 sets of the fresh air preheaters are turned off at the same time; when the indoor environment temperature of the vehicle cabin is less than the preset temperature of the vehicle cabin +1.5℃, 1 set of the fresh air preheaters is turned on; when the indoor environment temperature of the vehicle cabin is less than the preset temperature of the vehicle cabin +0.5℃, 2 sets of the fresh air preheaters are turned on.

[0029] Further, the air conditioning control cabinet adjusts the operation mode of the air conditioning unit according to the refrigeration mode, the heating mode or the ventilation mode, comprising:

[0030] When the air conditioning control cabinet determines that the air conditioning unit operates in the ventilation mode, the vehicle cabin switches the refrigeration mode, the heating mode or the ventilation mode according to the outdoor environment temperature of the vehicle cabin after leaving the tunnel.

[0031] Compared with the prior art, the present application has the following advantages:

[0032] The application provides a vehicle air conditioning unit control method suitable for tunnels and elevated lines. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative labor.

[0034] Figure 1 A schematic diagram for receiving information that the vehicle cabin is about to exit the tunnel.

[0035] Figure 2 A flowchart of the vehicle air conditioning unit control method suitable for tunnels and elevated lines provided by the present application. DETAILED DESCRIPTION

[0036] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative labor should be within the scope of protection of the present application.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily mean a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0038] REFERENCE Figure 1 and Figure 2 , Figure 1A schematic diagram for receiving the information that the vehicle is about to exit the tunnel, Figure 2 A flowchart of the vehicle air conditioning unit control method suitable for tunnels and elevated lines provided by the present application is used to illustrate a specific embodiment of the vehicle air conditioning unit control method suitable for tunnels and elevated lines provided by the present application, which comprises the following steps:

[0039] S1: The vehicle comprises multiple carriages, each carriage comprising an air conditioning unit and an air conditioning control cabinet. After receiving the information that the vehicle is about to exit the tunnel, the air conditioning control cabinet determines whether the air conditioning unit is running in a cooling mode, a heating mode, or a ventilation mode.

[0040] S2: The air conditioning control cabinet adjusts the operation mode of the air conditioning unit according to the cooling mode, the heating mode, or the ventilation mode, so that the indoor temperature of the vehicle remains constant after the carriage exits the tunnel and runs on the elevated line.

[0041] It should be understood that, Figure 1 The previous station in the tunnel can be a specific position at a preset distance from the tunnel entrance, and the information that the vehicle is about to exit the tunnel is transmitted to the air conditioning control cabinet of each carriage through "centralized control". The cooling mode, the heating mode, or the ventilation mode can be set according to actual needs, for example: when the outdoor temperature of the carriage is less than or equal to 16℃, the air conditioning unit is controlled to run in the heating mode; when the outdoor temperature of the carriage is greater than or equal to 16℃ and less than 19℃, the air conditioning unit is controlled to run in the ventilation mode; and when the outdoor temperature of the carriage is greater than or equal to 19℃, the air conditioning unit is controlled to run in the cooling mode. However, this is not limited thereto. By adjusting the operation mode of the air conditioning unit according to the cooling mode, the heating mode, or the ventilation mode, the indoor temperature of the vehicle remains constant after the carriage exits the tunnel and runs on the elevated line, which can avoid air conditioning system failures caused by a single control mode when the vehicle runs in the tunnel and on the elevated line, and can also improve the comfort level in the carriage.

[0042] In some optional embodiments, the air conditioning control cabinet adjusts the operation mode of the air conditioning unit according to the cooling mode, the heating mode, or the ventilation mode, which comprises the following steps:

[0043] When the air conditioning control cabinet determines that the air conditioning unit is running in the cooling mode, the air conditioning control cabinet determines a load adjustment offset;

[0044] The air conditioning control cabinet obtains the outdoor temperature of the carriage, and calculates the set temperature in the cooling mode according to the outdoor temperature of the carriage and the load adjustment offset;

[0045] The air conditioning control cabinet controls the air conditioning unit to run according to the set temperature in the cooling mode.

[0046] It can be understood that the load adjustment offset is considered when calculating the set temperature in the cooling mode, the load adjustment offset is related to the passenger load, the difference in the feeling due to the change in the passenger load is improved, and the control scheme of the set temperature of the vehicle cabin changing with the passenger load is increased.

[0047] In some optional embodiments, the air conditioning control cabinet determines the load adjustment offset, comprising:

[0048] When the passenger load of the vehicle cabin is less than the first threshold, the load adjustment offset is 1K;

[0049] When the passenger load of the vehicle cabin is greater than or equal to the first threshold and less than or equal to the second threshold, the load adjustment offset is 0;

[0050] When the passenger load of the vehicle cabin is greater than the second threshold, the load adjustment offset is -1K.

[0051] It can be understood that 1K is 1℃, and similarly, -1K is -1℃, so as to appropriately increase the set temperature in the cooling mode when the passenger load is small, and appropriately reduce the set temperature in the cooling mode when the passenger load is large.

[0052] In some optional embodiments, the air conditioning control cabinet calculates the set temperature in the cooling mode according to the outside environment temperature of the vehicle cabin and the load adjustment offset, and calculates in the following manner:

[0053] Ts 制冷 =22℃+0.25×(Toa 车外 -19)℃+ΔK;

[0054] Wherein, Ts 制冷 is the set temperature in the cooling mode, Toa 车外 is the outside environment temperature of the vehicle cabin, and ΔK is the load adjustment offset.

[0055] It can be understood that Toa 车外 at this time is the environment temperature of the tunnel.

[0056] In some optional embodiments, the air conditioning control cabinet adjusts the operation mode of the air conditioning unit according to the cooling mode, the heating mode or the ventilation mode, comprising:

[0057] When the air conditioning control cabinet judges that the air conditioning unit operates in the heating mode, the air conditioning control cabinet judges whether the outside environment temperature of the vehicle cabin is less than 5℃;

[0058] If less than 5℃, the air conditioning control cabinet controls the compressor of the air conditioning unit to stop and starts the electric heating, and switches to the normal heating working mode after 2 minutes of operation;

[0059] If greater than or equal to 5℃, the air conditioning control cabinet controls the air conditioning unit to operate in the normal heating working mode.

[0060] It can be understood that if the heating mode is run and the outside environment temperature of the vehicle cabin is less than 5℃, the electric heating is started to preheat for 2 minutes to avoid the problem of short-time cold air blowing of the air conditioning unit in the process of entering the viaduct with lower environment temperature from the tunnel.

[0061] In some optional embodiments, the normal heating mode includes:

[0062] When the outside environment temperature of the vehicle cabin is greater than or equal to -13℃, if the inside environment temperature of the vehicle cabin is less than the preset temperature of the vehicle cabin, the frequency of the compressor is controlled, and the air conditioning unit is run according to the preset temperature of the vehicle cabin.

[0063] When the outside environment temperature of the vehicle cabin is less than -13℃, if the inside environment temperature of the vehicle cabin is less than the preset temperature of the vehicle cabin, 2 sets of fresh air preheaters of the air conditioning unit are started, when the inside environment temperature of the vehicle cabin is greater than the preset temperature of the vehicle cabin +1℃, 1 set of fresh air preheater is closed, when the inside environment temperature of the vehicle cabin is greater than the preset temperature of the vehicle cabin +2℃, 2 sets of fresh air preheaters are closed at the same time, when the inside environment temperature of the vehicle cabin is less than the preset temperature of the vehicle cabin +1.5℃, 1 set of fresh air preheater is started, and when the inside environment temperature of the vehicle cabin is less than the preset temperature of the vehicle cabin +0.5℃, 2 sets of fresh air preheaters are started.

[0064] It can be understood that when the fresh air preheater is started, if the outside environment temperature of the vehicle cabin is greater than or equal to -13℃ at this time, the fresh air preheater stops running, and the compressor starts running.

[0065] Specifically, the air conditioning control cabinet detects the inside environment temperature of the vehicle cabin in real time, and adjusts the starting and closing of the fresh air preheater according to the inside environment temperature of the vehicle cabin in real time, so as to realize the constant inside environment temperature of the vehicle cabin.

[0066] In some optional embodiments, the air conditioning control cabinet adjusts the running mode of the air conditioning unit according to the cooling mode, the heating mode or the ventilation mode, including:

[0067] When the air conditioning control cabinet judges that the air conditioning unit runs in the ventilation mode, the vehicle cabin is switched to the cooling mode, the heating mode or the ventilation mode according to the outside environment temperature of the vehicle cabin after the vehicle cabin exits the tunnel.

[0068] The above-mentioned serial numbers of the embodiments of the application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0069] In the above-mentioned embodiments of the application, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A control method for vehicle air conditioning units applicable to tunnels and elevated lines, characterized in that, include: The vehicle consists of multiple carriages, each carriage containing an air conditioning unit and an air conditioning control cabinet. After receiving information that the vehicle is about to exit the tunnel, the air conditioning control cabinet determines whether the air conditioning unit is operating in cooling mode, heating mode, or ventilation mode. The air conditioning control cabinet adjusts the operating mode of the air conditioning unit according to the cooling mode, the heating mode, or the ventilation mode, so that the interior temperature of the vehicle remains constant after the carriage moves from the tunnel to the elevated line. When the air conditioning control cabinet determines that the air conditioning unit is operating in the cooling mode, the air conditioning control cabinet determines the load adjustment offset, specifically including: When the passenger capacity of the carriage is less than the first threshold, the load adjustment offset is 1K; When the passenger capacity of the carriage is greater than or equal to the first threshold and less than or equal to the second threshold, the load adjustment offset is 0; When the passenger capacity of the carriage is greater than the second threshold, the load adjustment offset is -1K; The air conditioning control cabinet acquires the outside ambient temperature of the vehicle compartment and calculates the set temperature in the cooling mode based on the outside ambient temperature of the vehicle compartment and the load adjustment offset. The set temperature in the cooling mode is calculated as follows: Ts 制冷 =22℃+0.25×(Approximately 车外 -19)℃+ΔK; Among them, Ts 制冷 Toa is the set temperature in the cooling mode. 车外 The ambient temperature outside the carriage is ΔK, and the load adjustment offset is ΔK. The air conditioning control cabinet controls the air conditioning unit to operate at the set temperature according to the cooling mode.

2. The vehicle air conditioning unit control method applicable to tunnels and elevated lines according to claim 1, characterized in that, The air conditioning control cabinet adjusts the operating mode of the air conditioning unit according to the cooling mode, the heating mode, or the ventilation mode, including: When the air conditioning control cabinet determines that the air conditioning unit is operating in the heating mode, the air conditioning control cabinet determines whether the outside ambient temperature of the vehicle compartment is less than 5°C. If the temperature is below 5°C, the air conditioning control cabinet controls the compressor of the air conditioning unit to stop and the electric heater to start. After running for 2 minutes, it switches to the normal heating mode. If the temperature is greater than or equal to 5°C, the air conditioning control cabinet controls the air conditioning unit to operate in the normal heating mode.

3. The vehicle air conditioning unit control method applicable to tunnels and elevated lines according to claim 2, characterized in that, The normal heating operating mode includes: When the outside temperature of the vehicle compartment is greater than or equal to -13℃, if the inside temperature of the vehicle compartment is less than the preset temperature of the vehicle compartment, the compressor frequency is controlled and the air conditioning unit operates according to the preset temperature of the vehicle compartment. When the outside temperature of the vehicle compartment is less than -13℃, if the inside temperature of the vehicle compartment is less than the preset temperature of the vehicle compartment, two sets of fresh air preheaters of the air conditioning unit are turned on. When the inside temperature of the vehicle compartment is greater than the preset temperature of the vehicle compartment +1℃, one set of fresh air preheaters is turned off. When the inside temperature of the vehicle compartment is greater than the preset temperature of the vehicle compartment +2℃, both sets of fresh air preheaters are turned off simultaneously. When the inside temperature of the vehicle compartment is less than the preset temperature of the vehicle compartment +1.5℃, one set of fresh air preheaters is turned on. When the inside temperature of the vehicle compartment is less than the preset temperature of the vehicle compartment +0.5℃, both sets of fresh air preheaters are turned on.

4. The vehicle air conditioning unit control method applicable to tunnels and elevated lines according to claim 1, characterized in that, The air conditioning control cabinet adjusts the operating mode of the air conditioning unit according to the cooling mode, the heating mode, or the ventilation mode, including: When the air conditioning control cabinet determines that the air conditioning unit is operating in the ventilation mode, the carriage switches between the cooling mode, the heating mode, or the ventilation mode according to the outside ambient temperature of the carriage after exiting the tunnel.

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