KR20220083060A - The cooling system for nursing room of railroad cars - Google Patents

Abstract

The present invention realizes a lightweight and compact cooling system in the nursing room of a railroad car, and controls the cooling temperature according to the current operating state of the nursing room cooling system and the presence or absence of users in the nursing room to the crew and vehicle maintainers, so that the energy efficiency required for cooling In addition, comfortable cooling air can be supplied to the nursing room by maximizing cooling efficiency, and the installation position of the bracket that fixes the cooling device according to the condition of the inner wall of the body of the nursing room is located in the up, down, front and rear directions. It provides a cooling system for the nursing room of railroad vehicles that can be adjusted to increase workability and practicality.

Description

The cooling system for nursing room of railroad cars

The present invention relates to a cooling system for a nursing room of a railroad vehicle, and more particularly, a lightweight compact cooling system is implemented in a nursing room of a railroad vehicle, and the number of rotations of a compressor and an evaporator motor is increased or decreased by detecting a user using the nursing room. It relates to a cooling system for a nursing room of a railroad vehicle that increases the energy efficiency required for cooling by automatically controlling the temperature.

The air conditioner installed in the carriage of railroad cars has a heater installed inside so that it can be used as both a cold fan and a hot fan. By operating the heater and introducing hot air, the temperature inside the room can be adjusted appropriately.

In the air conditioner of railway vehicles, a temperature sensor is installed on the upper part of the evaporator room where the heater and evaporator are installed to prevent the air conditioner from overheating when the air conditioner is used as a heater so as to be adjacent to the heater. When this stops and the temperature of the evaporator chamber rises above a predetermined level, a safety device electrically connected to detect this and cut off the power connected to the heater is installed.

On the other hand, as the contribution of high-speed rail as a major means of transportation increases, more improved services are required for convenience facilities of railroad vehicles.

Representative nursing rooms are located in two places of passenger cars 8 and 16, respectively, based on KTX standards, and the crew room with the same structure is located in passenger cars 2 and 11. The nursing room section is in contact with the platform and ancillary areas, so air circulation is very weak. Therefore, there is no separate cooling device in the nursing room.

However, in the case of KTX, since it will be operated for more than 15 years, it is urgent to develop a cooling system to solve frequent complaints about using the nursing room.

Document 1: Korean Patent Office Laid-Open Patent Publication No. 2001-0005044

Accordingly, an object of the present invention to solve the above problems is to provide a cooling system for a nursing room of a railroad vehicle that implements a lightweight and compact cooling system in the nursing room of the railroad vehicle.

Another object of the present invention is to control the cooling temperature according to the current operating state of the nursing room cooling system and the presence or absence of users in the nursing room to train crew and vehicle maintainers to increase the energy efficiency required for cooling. do.

Another object of the present invention is to provide a cooling system for a nursing room of a railroad vehicle to supply comfortable cooling air according to the maximization of cooling efficiency.

Another object of the present invention is to provide a cooling system for a nursing room of a railroad vehicle in which the installation position of the bracket for fixing the cooling device can be adjusted in the up, down, front, and rear directions according to the situation of the inner wall of the vehicle body.

The present invention for achieving the above objects in a nursing room cooling system of a railroad vehicle installed in a nursing room of a railroad car to cool the nursing room by lowering the temperature of the nursing room, by introducing a liquid refrigerant decompressed to a low temperature and low pressure to exchange heat with the indoor air of the nursing room An evaporator that freezes by heat absorption by liquid evaporation, an inverter compressor that sucks in the low-temperature and low-pressure gas refrigerant evaporated from the evaporator and increases the pressure to a saturation pressure corresponding to the condensing temperature, high-temperature and high-pressure gas discharged from the inverter compressor A condenser that condenses and liquefies the refrigerant by exchanging heat with ambient air or cooling water to release the high-temperature heat of the gaseous refrigerant. At the same time, a cooling device composed of an electronic expansion valve that regulates and supplies the refrigerant flow rate so as to simultaneously strengthen and cause heat absorption by liquid evaporation in the evaporator is installed in the nursing room. A human body sensor for controlling the operation of the cooling device is installed, the cooling device is supported on a cradle, and the cradle is installed in the nursing room through left and right upper fixing brackets, and the left upper fixing bracket is provided with the cooling device. The front plate contacting the rear left side of the cradle for supporting the device, the upper and lower long holes formed on the upper and lower sides of the front plate, and the hole formed on the rear left side of the cradle are passed through the nut and fastened to the front plate. A bolt for fixing to the rear left side of the cradle, an upper plate formed by bending on the upper surface of the front plate, a left upper fixing frame installed on an upper reinforcing bar installed on the ceiling of the nursing room and contacting the upper surface of the upper plate, the upper left The nut is fastened while passing through the long hole formed in the fixed frame and the hole formed in the upper plate, and it consists of a bolt for fixing the upper plate to the left upper fixed frame, and the right upper fixing bracket is the cooling device. The front plate in contact with the rear right side of the cradle that supports the , a bolt that passes through the upper and lower long holes formed in the lower part and the hole formed on the right rear side of the holder and is fastened with a nut to fix the front plate to the rear right side of the holder, and an upper surface formed by bending on the upper surface of the front plate Plate, a connecting angle fastened with bolts and nuts to the upper surface of the upper plate and having a “∪” cross-sectional shape, a right upper fixed frame installed on the upper reinforcing bar and contacting the connecting angle, and formed on both sides of the connecting angle It is characterized in that it consists of a long hole and a bolt that is fastened with a nut while passing through the holes formed on both sides of the right upper fixed frame and fixed the connecting angle to the right upper fixed frame.

The present invention realizes a lightweight and compact cooling system in the nursing room of a railroad car, and controls the cooling temperature according to the current operating state of the nursing room cooling system and the presence or absence of users in the nursing room to the crew and vehicle maintainers, so that the energy efficiency required for cooling has the effect of increasing

In addition, comfortable cooling air can be supplied to the nursing room by maximizing cooling efficiency, and the installation position of the bracket fixing the cooling device can be adjusted in the up, down and front and rear directions according to the condition of the inner wall of the body of the nursing room. Thus, workability and practicality can be improved.

1 is a view showing the configuration of a cooling device of a cooling system for a nursing room of a railroad vehicle.
FIG. 2 is a diagram illustrating a configuration for automatically controlling the air conditioner of FIG. 1;
Fig. 3 is a flow chart of Fig. 2;
4 is a front view illustrating a bracket structure for installing the air conditioner of FIG. 1 in a nursing room.
Fig. 5 is a plan view of Fig. 4;
Figure 6 is a view taken from the side view taken from the structure of the upper left fixing bracket in Figure 4;
Fig. 7 is a front view of Fig. 6;
Fig. 8 is an assembly view of Fig. 6;
9 is a view taken from the side of the structure of the upper right fixing bracket in FIG.
Fig. 10 is a front view of Fig. 9;
11 is an assembly view of FIG. 9 ;

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the detailed description to be described later, an exemplary embodiment of the present invention will be presented in order to achieve the above-described technical problem. And other embodiments that can be presented as the present invention is replaced by the description in the configuration of the present invention.

1 is a view showing the overall configuration of a cooling system for a nursing room of a railroad vehicle according to the present invention, FIG. 2 is a diagram showing a configuration for automatically controlling the cooling device of FIG. 1, and FIG. 3 is FIG. of FIG. 4 is a front view showing a bracket structure for installing the cooling device of FIG. 1 in a nursing room, and FIG. 5 is a plan view of FIG.

1 to 5, the cooling system of the nursing room of the railroad vehicle of the present invention is in contact with the platform and the annexed area, so air circulation is very weak, so the cooling device 400 in the nursing room, which is an area excluded from the cooling system of the railroad vehicle ) to provide more improved services for convenience facilities of railroad vehicles.

The cooling device 400 constituting the cooling system of the nursing room of the railroad car includes an evaporator 100 , an inverter compressor 110 , a condenser 120 , and an electronic expansion valve 130 .

The evaporator 100 passes through the electronic expansion valve 130 and introduces a liquid refrigerant decompressed to a low temperature and low pressure to exchange heat with a space around the nursing room or an object to be cooled, thereby achieving the purpose of refrigeration by absorbing heat by liquid evaporation. The evaporator 100 is composed of an evaporator pin coil 102 that allows the low-temperature and low-pressure refrigerant liquid to lower the indoor temperature through heat exchange, and an evaporator fan motor 104 used as a blower for air circulation in the nursing room. The evaporator fan motor 104 preferably applies a speed-adjustable BLDC motor for capacity control, and enables automatic acceleration/deceleration operation according to the presence or absence of human body detection and room temperature.

The inverter compressor 110 sucks the low-temperature and low-pressure gas refrigerant evaporated in the evaporator 100 and increases the pressure to the saturation pressure corresponding to the condensing temperature so that it can be condensed into a liquid in the next condenser 120 .

The condenser 120 is a device for condensing and liquefying the high-temperature and high-pressure gas refrigerant discharged from the compressor 110 by exchanging heat with ambient air or cooling water to release the high-temperature heat of the gas refrigerant. The condenser 120 is composed of a condenser pin coil 122 that cools a high-temperature refrigerant through heat exchange, and a condenser fan motor 124 that cools and blows condensed heat, and the condenser fan motor 124 has a speed for capacity control. It is preferable to apply an additive type BLDC motor.

The electronic expansion valve 130 simultaneously strengthens the temperature and pressure of the high-temperature and high-pressure liquid refrigerant condensed and liquefied in the condenser 120 into a low-temperature and low-pressure liquid refrigerant by a throttling action to absorb heat by evaporating the liquid in the evaporator 100 . An appropriate amount of refrigerant flow is regulated and supplied to cause it to occur.

That is, when the inverter compressor 110 compresses the refrigerant and increases the pressure and temperature of the refrigerant gas to the saturation pressure during cooling operation, the condenser 120 uses water or air to heat the high temperature and high pressure refrigerant gas. It condenses and liquefies the refrigerant gas by absorbing it.

The temperature and pressure of the condensed and liquefied refrigerant gas are lowered by the throttling action of the electronic expansion valve 130, and the refrigerant gas evaporates in the evaporator 100 and heat exchanges the air in the nursing room to make the room temperature of the nursing room comfortable. it will be maintained

On the other hand, various sensors are installed in the cooling system of the nursing room having the cooling device, so as to automatically control the operation of the cooling device by sensing the user's detection of the nursing room and the indoor and outdoor temperatures of the nursing room.

The sensor includes an inlet temperature sensor 140 , an outlet temperature sensor 150 , an outside air temperature sensor 160 , and a human body detection sensor 170 .

The inlet and outlet temperature sensors 140 and 150 sense the temperature of the air in the nursing room that is sucked in and discharged by the evaporator 100 and send a signal to the controller 180, and the controller 180 includes the inlet and outlet temperature sensors ( 140, 150) by increasing or decreasing the rotation speed of the evaporator fan motor according to the signal of the lactation room temperature.

The outdoor temperature sensor 160 senses the temperature outside the nursing room and sends a signal to the control unit, and the control unit controls the temperature inside the nursing room according to the signal from the outside temperature sensor.

The human body sensor 170 is installed inside the nursing room, detects a user using the nursing room, and sends a signal to the control unit 180, the control unit 180 according to the detection signal of the human body detection sensor 170, the air conditioner 400 ) to start driving.

Table 1 below shows one embodiment according to the optimal operating conditions of the air conditioner using the human body sensor.

3 is a flowchart illustrating an operation flow of the air conditioner using a human body detection sensor.

That is, when the human body sensor 170 detects the user for 10 seconds, the controller 180 drives the evaporator fan motor to start operation. At this time, it operates first for 1 minute with the start of operation.

Next, the control unit 180 drives the compressor and the condenser fan motor, and in this case, the initial operation is basically operated for 30 minutes. The temperature condition is maintained between 22°C and 24°C when the user is indoors in the nursing room, and maintains a temperature between 23°C and 27°C when there is no user in the nursing room.

Next, after 30 minutes, the human body sensor detects the user in the nursing room, and when the user is detected, the above step S30 is repeated, and if the user is not detected in the nursing room, the waiting state is maintained.

Meanwhile, FIGS. 4 and 5 are views showing the structures of upper left and right upper fixing brackets for fixing and installing each component of the air conditioner in a nursing room indoors.

On the other hand, when fixing the evaporator with the left and right upper fixing brackets, it will be installed inside the nursing room, and when fixing the condenser, it will be installed outside the nursing room. It is representatively described as being installed in the nursing room by means of a fixed bracket.

The bracket is divided into a left upper fixing bracket 10 and a right upper fixing bracket 50 .

6 to 8, the upper left fixing bracket 10 is mounted on the left side of the cooling device 400 and is a bracket for fixing the cooling device 400 to the upper reinforcement 300 installed on the ceiling of the nursing room.

The upper left fixing bracket 10 includes a front plate 12 , a top plate 22 bent on an upper portion of the front plate 12 , both sides of the top plate 22 , and both sides of the front plate 12 . It is composed of first and second side plates 40 and 42 respectively bent on the It is installed on the 300 and consists of a left upper fixed frame 30 that is coupled with a bolt and a nut while in contact with the upper surface of the upper plate 22 .

The front plate 12 is fastened with a bolt 18 and a nut 20 to the rear left side of the cradle 200 supporting the air conditioner 400 . Upper and lower elongated holes 14 and 16 are formed in the front plate 12 , and the upper and lower elongated holes 14 and 16 and the hole 202 formed on the left side of the rear surface of the holder 200 are used in the front plate 12 . The nut 20 is fastened in a state in which the bolts 18 are sequentially penetrated, and the front plate 12 is fixed to the rear left side of the cradle 200 . At this time, through the length of the upper and lower long holes 14 and 16, the position of the front plate 12 can be adjusted up and down on the rear left side of the cradle 200. (400) It is possible to change the installation location.

The upper plate 22 is fastened with a bolt 34 and a nut 36 to the left upper fixing frame 30 installed on the upper reinforcing bar 300 installed on the ceiling of the nursing room.

To this end, a hole 24 is formed in the upper surface plate 22, and the hole 24 and the long hole ( 32), the bolt 34 is passed through the nut 36, and the upper plate 22 is fixed to the left upper fixing frame 30.

Through the length of the long hole 32 of the left upper fixed frame 30, the upper surface plate 22 can be positioned in the front and rear directions in the left upper fixed frame 30, and through this, the internal structure of the nursing room interior It is possible to change the installation of the cooling device 400 in accordance with the change.

9 to 11 are views showing the structure of the upper right fixing bracket.

As shown, the upper right fixing bracket 50 includes a front plate 52 , a top plate 54 bent on the top of the front plate 52 , the top plate 54 and the right upper fixing frame 80 . ), the upper right upper fixed frame 80 is installed on the upper reinforcement 300 installed on the ceiling of the nursing room and is in contact with the upper surface of the connecting angle 66.

The front plate 52 is fastened with a bolt 58 and a nut 60 to the right rear side of the holder 200 supporting the air conditioner 400 . Upper and lower long holes 54 and 56 are formed in the front plate 52 , and a hole 204 is formed in the right rear surface of the holder 200 . The nut 60 is fastened to the hole 204 and the upper and lower long holes 54 and 56 in a state where the bolt 58 penetrates, and the front plate 52 is fixed to the right rear side of the holder 200 . At this time, through the length of the upper and lower long holes 54 and 56, the position of the front plate 52 can be adjusted up and down on the right rear side of the cradle. ) to be able to change the installation location.

The upper plate 62 is bent horizontally on the upper surface of the front plate 52 and is fastened to the connecting angle 66 with the bolt 68 and the nut 70 .

The connecting angle 66 has a “∪” cross-sectional shape and connects and fixes the right upper fixing bracket 50 to the right upper fixing frame 80 installed on the upper reinforcement 300 of the ceiling.

A hole is formed in the lower surface of the connection angle 66, and the hole is connected to the hole of the upper plate so that the bolt 68 and the nut 70 are fastened. And a long hole 72 is formed on both sides of the connection angle 66, and the long hole 72 is in communication with the hole 82 formed on both sides of the right upper fixing frame 80, the bolt 85 and It is fastened with a nut (86).

At this time, through the length of the long hole 72 of the connection angle 66, the position of the upper right fixing bracket 50 can be adjusted in the front and rear directions in the right upper fixing frame 80, and through this, the internal structure of the nursing room interior Make it possible to change the installation location of the air conditioner in accordance with changes in the air conditioner.

10: upper left fixing bracket 12: front panel
22: upper plate 30: upper left fixed frame
50: upper right fixing bracket 52: front panel
62: top plate 66: connection angle
72: long hole 80: upper right fixed frame
100: evaporator 110: inverter compressor
120: condenser 130: electronic expansion valve
170: human body detection sensor 180: control unit
200: cradle 300: upper reinforcement
400: air conditioner

Claims (1)

In the nursing room cooling system of a railroad car installed in the nursing room of the railroad car to cool the breastfeeding room by lowering the temperature,
an evaporator 100 that introduces a liquid refrigerant decompressed to a low temperature and low pressure, exchanges heat with indoor air in the nursing room, and freezes it by heat absorption by liquid evaporation;
an inverter compressor 110 that sucks in the low-temperature and low-pressure gaseous refrigerant evaporated in the evaporator 100 and increases the pressure to a saturation pressure corresponding to the condensing temperature;
a condenser 120 for condensing and liquefying the high-temperature and high-pressure gas refrigerant discharged from the inverter compressor 110 by exchanging heat with ambient air or cooling water to release the high-temperature heat of the gas refrigerant;
The high-temperature and high-pressure liquid refrigerant condensed in the condenser 120 is simultaneously strengthened to a low-temperature and low-pressure liquid refrigerant by a throttling action, so that the evaporator 100 can absorb heat by evaporating the liquid. A cooling device 400 composed of an electronic expansion valve 130 for controlling and supplying the flow rate is installed in the nursing room;
a human body detection sensor 170 is installed in the nursing room to detect a user using the nursing room and send a signal to the controller 180 to control the operation of the air conditioner;
The cooling device 400 is supported on a cradle 200, and the cradle 200 is installed in a nursing room through left and right upper fixing brackets 10 and 50;
The left upper fixing bracket 10 is;
a front plate 12 in contact with the rear left side of the cradle 200 supporting the cooling device 400;
It passes through the upper and lower long holes 14 and 16 formed in the upper and lower portions of the front plate 12 and the hole 202 formed in the rear left side of the cradle 200, and the nut 20 is fastened. a bolt 18 for fixing the front plate 12 to the rear left side of the cradle 12;
an upper plate 22 formed by bending on the upper surface of the front plate 12;
a left upper fixed frame 30 installed on the upper reinforcing bar 300 installed on the ceiling of the nursing room and in contact with the upper surface of the upper surface plate 22;
The nut 36 is fastened while passing the long hole 32 formed in the left upper fixing frame 30 and the hole 24 formed in the upper surface plate 22, and the upper surface plate 22 is attached to the Consists of a bolt (34) for fixing to the upper left fixed frame (30);
The right upper fixing bracket 50 is;
a front plate 52 in contact with the rear right side of the cradle 300 for supporting the cooling device 400;
It passes through the upper and lower long holes 54 and 56 formed in the upper and lower portions of the front plate 52 and the hole 204 formed in the rear right side of the holder 300, and the nut 60 is fastened, and the a bolt 58 for fixing the front plate 52 to the rear right side of the holder 300;
an upper plate 62 formed by bending on the upper surface of the front plate 52;
a connection angle 66 fastened with a bolt 68 and a nut 70 to the upper surface of the upper surface plate 62 and having a "∪"-shaped cross-sectional shape;
a right upper fixed frame (80) installed on the upper reinforcing bar (300) and in contact with the connecting angle (66);
The long hole 72 formed on both sides of the connection angle 66 and the hole 82 formed on both sides of the right upper fixing frame 80 are passed through the nut 86, and the connection angle is fastened. A cooling system for a nursing room of a railroad vehicle, characterized in that it consists of a bolt (84) for fixing (86) to the upper right fixing frame (80).

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