JP5014650B2 - Passenger conveyor heat dissipation device - Google Patents

Description

  The present invention relates to a heat dissipating device for a passenger conveyor that dissipates heat generated from a control panel or the like in a machine room of the passenger conveyor.

  In a conventional escalator, heat generated from a control panel or the like in the machine room is exhausted (air circulation) to the outside of the machine room by a cooling fan attached to a boarding board that closes the upper part of the machine room, and the temperature in the machine room is suppressed. (For example, refer to Patent Document 1).

JP 2004-352383 A

In recent years, the demand for space-saving passenger conveyors has increased, and in particular, there is a strong demand for reducing the opening size (the length of the main frame) on the building side where the inclined passenger conveyor is installed.
However, the conventional escalator as described above cannot reduce the size of the board for getting on and off the board because the cooling fan is attached, and there is a limit to the space saving of the machine room. In addition, noise was generated due to the rotation of the cooling fan.

  This invention is made in order to solve the above subjects, and obtains the heat dissipation apparatus of the passenger conveyor which can aim at the space-saving of the machine room of a passenger conveyor, and can reduce a noise. For the purpose.

A heat dissipating device for a passenger conveyor according to the present invention has a heat absorption part that absorbs heat generated in a machine room, and has a circulation channel for circulating a refrigerant between the heat absorption part and the outside of the machine room in the main frame. A circulation flow path forming member to be formed, a circulation pump provided in the circulation flow path forming member and circulating in the circulation flow path, and a circulation control unit provided in the machine room for controlling the drive of the circulation pump , The flow path forming member is provided with cooling means for cooling the refrigerant, and lubricating oil supplied to the chain of the passenger conveyor is used as the refrigerant.

  The heat dissipating device for a passenger conveyor according to the present invention circulates a refrigerant that has absorbed heat generated in the machine room between the machine room and the outside of the machine room in the main frame by a circulation pump, Because heat is exchanged with the outside of the machine room, by omitting the cooling fan, the boarding / alighting board can be reduced, the space of the passenger conveyor machine room can be saved, and noise can be reduced. Can do.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a side view showing a heat radiating device for a passenger conveyor according to Embodiment 1 of the present invention. FIG. 2 is a block diagram specifically showing the passenger conveyor heat dissipation device of FIG.
In the figure, a main frame 1 is spanned between floors of a building. An upper machine room 2 is provided at the upper end of the main frame 1. The upper machine room 2 is provided with a control panel 3 as a circulation control unit and a passenger conveyor drive (not shown). The control panel 3 controls the operation of the passenger conveyor. Further, the control panel 3 generates heat in accordance with the operation control of the passenger conveyor, and discharges exhaust hot air (arrow 3 a) into the upper machine room 2.

  A circulation pipe 4 as a circulation flow path forming member is provided in the main frame 1. The circulation pipe 4 forms a lubricating oil flow path. Lubricating oil is supplied to a chain (not shown) of a pair of passenger conveyors such as a chain of a moving handrail drive device. The circulation pipe 4 includes an upper chord portion 4 a along the upper chord of the main frame 1, an intermediate portion 4 b located in the middle portion of the main frame 1, a lower chord portion 4 c along the lower chord of the main frame 1, and a machine that passes through the vicinity of the control panel 3. It has a chamber 4d.

  The upper chord part 4a, the intermediate part 4b, the lower chord part 4c, and the machine room part 4d allow the lubricating oil to circulate between the inside of the upper machine room 2 in the main frame 1 and the outside of the upper machine room 2. A meandering (continuous U-shaped) heat absorption part (pipe heat absorption part) 4e is provided in the vicinity of the control panel 3 of the machine room part 4d. The heat of the exhaust hot air discharged from the control panel 3 is absorbed by the lubricating oil at the heat absorbing portion 4e. That is, the heat absorption part 4e absorbs the heat generated in the upper machine chamber 2, and conducts the heat absorbed by the lubricating oil flowing in the heat absorption part 4e.

  In the main frame 1, a relay pipe 5 connected to a connection portion between the upper chord portion 4a and the intermediate portion 4b is provided. The relay pipe 5 forms a flow path for guiding the lubricating oil in the upper chord part 4a to the lower part of the main frame 1 (in the direction of the arrow 5a). A plurality of oil supply pipes 6 as oil supply flow path forming members are connected to the upper chord portion 4a and the relay pipe 5. The oil supply pipe 6 forms a flow path that guides the lubricating oil to the chain of the passenger conveyor.

  Each of the oil supply pipes 6 connected to the end of the relay pipe 5 on the side of the circulation pipe 4 and the upper chord part 4a is provided with an oil supply valve 7 capable of opening and closing the flow path. The opening and closing of the oil supply valve 7 is controlled by the control panel 3. A nozzle 8 is attached to the tip of each oil supply pipe 6. When the lubricating oil in each oil supply pipe 6 receives pressure, it flows out from the nozzle 8 to the chain of the passenger conveyor (arrow 8a).

  The lower chord portion 4c is provided with a circulation valve 9 capable of opening and closing the flow path in order to block the circulation by the lubricating oil in the circulation pipe 4. Opening and closing of the circulation valve 9 is controlled by the control panel 3. An oil tank 10 for storing lubricating oil is connected to the machine chamber 4d side of the circulation valve 9 of the lower chord 4c. In the oil tank 10, an oil pump (oil supply pump) 11 as a circulation pump is provided.

  The oil pump 11 pumps up the lubricating oil in the oil tank 10. The lubricating oil in the oil tank 10 is pumped by the oil pump 11 and receives pressure for flowing in the pipes 4 to 6. The drive of the oil pump 11 is controlled by the control panel 3.

  Here, the control panel 3 has an oil supply valve in a plurality of control modes including a heat exchange mode for circulating the lubricating oil in the circulation pipe 4 and an oil supply mode for supplying the lubricating oil to the passenger conveyor chain. 7 and the opening and closing of the circulation valve 9 are controlled. Further, the control panel 3 normally sets the control mode to the heat exchange mode. Furthermore, a refueling start time (for example, 30 hours) is set in the control panel 3.

  Furthermore, the control panel 3 counts the cumulative start time of the passenger conveyor, and switches the control mode from the heat exchange mode to the fuel supply mode when the cumulative start time is equal to or longer than the fuel supply start time. Furthermore, a predetermined refueling time (for example, 10 minutes) is set in the control panel 3. In addition, the control panel 3 determines that refueling to the chain of the passenger conveyor has ended when the refueling time has expired, and switches the control mode from the refueling mode to the heat exchange mode.

  Further, the control panel 3 causes the lubricating oil to circulate in the circulation pipe 4 by closing the oil supply valve 7 and opening the circulation valve 9 in the heat exchange mode. Therefore, the lubricating oil in the oil tank 10 is circulated between the outside of the upper machine chamber 2 in the main frame 1 and the heat absorbing portion 4e by driving the oil pump 11. Then, the lubricating oil flowing in the heat absorbing portion 4e absorbs the heat of the exhaust hot air and flows to the outside of the upper machine chamber 2 in the upper chord portion 4a. The lubricating oil that has flowed to the outside of the upper machine room 2 dissipates the absorbed heat to the outside of the upper machine room 2 by the flow from the upper chord part 4a to the lower chord part 4c (heat exchange), and flows into the oil tank 10 (return). Is done.

  Furthermore, the control panel 3 opens the oil supply valve 7 and closes the circulation valve 9 in the oil supply mode, thereby closing the oil tank 10 through the machine chamber portion 4d, the heat absorbing portion 4e, and the upper chord portion 4a. The lubricating oil is caused to flow through the oil supply pipe 6 connected to the relay pipe 5 and the oil supply pipe 6 connected to the upper chord portion 4a to supply the oil to the passenger conveyor chain.

  The control panel 3 can be configured by a microcomputer (not shown) having an arithmetic processing unit (CPU), a storage unit (ROM and RAM), and a signal input / output unit. A program for realizing the operation of the control panel 3 is stored in the storage unit of the microcomputer of the control panel 3.

  Next, the operation will be described. In the heat exchange mode, the control panel 3 opens the circulation valve 9 and closes the oil supply valve 7 to drive the oil pump 11. The lubricating oil in the oil tank 10 is pumped up from the oil tank 10 by driving the oil pump 11, circulated in the circulation pipe 4 (in the direction from the arrow 4 f to the arrow 4 g), and flows into the oil tank 10. . As a result, the heat of the exhaust hot air (arrow 3a) generated from the control panel 3 is absorbed by the lubricating oil flowing in the heat absorbing portion 4e, and the lubricating oil that has absorbed the heat passes through the upper chord portion 4a and passes through the upper machine chamber 2 It is washed away. Then, the heat absorbed by the lubricating oil is cooled, so that heat is exchanged between the upper machine room 2 and the outside of the upper machine room 2 in the main frame 1, and the heat generated from the control panel 3 is It is dissipated outside the upper machine room 2.

  On the other hand, the control panel 3 switches the control mode from the heat exchange mode to the fueling mode when the cumulative activation time of the passenger conveyor is equal to or longer than the fueling start time. The control panel 3 closes the circulation valve 9 and opens the oil supply valve 7 to drive the oil pump 11 in the oil supply mode. The lubricating oil in the oil tank 10 is pumped up from the oil tank 10 by the drive of the oil pump 11, guided to the passenger conveyor chain by the oil supply pipe 6 and the nozzle 8, and supplied to the passenger conveyor chain (arrow 8a). In the direction of Then, the control panel 3 continues the fueling mode until the fueling time expires.

  In the heat dissipating device for passenger conveyors as described above, heat is generated in the machine room by absorbing the heat from the control panel into the lubricating oil and circulating the lubricating oil between the outside of the machine room in the main frame and the heat absorbing part. Since the heat is dissipated, the temperature in the machine room can be suppressed, and the stability of the operation of the electronic device used in the control panel can be improved.

  Further, by omitting the cooling fan, the boarding / alighting board can be reduced, the space of the machine room of the passenger conveyor can be saved, and noise can be reduced.

  Furthermore, since a heat radiation effect can be obtained by adding a circulation pipe to the oil supply pipe of a conventionally used oil supply device for a passenger conveyor chain (change to a circulation system), the installation cost can be reduced. .

  Note that a heat sink or the like may be attached to the heat absorbing portion. In this case, since the surface area of the heat absorbing portion increases, the heat absorbing efficiency by the heat absorbing portion can be improved.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described. A temperature detection sensor (not shown) provided in the upper machine room 2 is connected to the control panel 3 according to the second embodiment. Moreover, the control panel 3 measures the temperature in the upper machine room 2 via a temperature detection sensor. Furthermore, the control panel 3 is set to a specified temperature (for example, 40 degrees), and switches the control mode depending on whether the temperature in the upper machine room 2 is equal to or higher than the specified temperature.

  Furthermore, the control panel 3 is set with a warning timer for a predetermined time (for example, 24 hours). Here, the warning timer will be described. In general passenger conveyors, there are rest periods (nighttime, early morning, etc.) that are less time-consuming operation periods within 24 hours. The warning timer assumes that the temperature of the upper machine room 2 is lower than the specified temperature during this downtime period. When the temperature of the upper machine room 2 is equal to or higher than the specified temperature, the warning timer is in the heat exchange mode until the downtime period. While continuing, it is for detecting the temperature abnormality of the upper machine room 2. FIG.

  Further, the control panel 3 starts a warning timer if the temperature in the upper machine room 2 is equal to or higher than a specified temperature when the cumulative activation time is equal to or longer than the refueling start time. When the warning timer exceeds the set time, the control panel 3 determines that a temperature abnormality has occurred in the upper machine room 2. Further, when the control panel 3 determines the occurrence of a temperature abnormality in the upper machine room 2, the control panel 3 outputs warning information to a management panel (not shown) connected so as to be communicable. Furthermore, the control panel 3 determines that the temperature abnormality in the upper machine room 2 has been resolved by receiving a manual reset from the administrator while outputting the warning information to the management panel. The output is stopped and the operation of opening / closing control of each valve is restored. Other configurations are the same as those in the first embodiment.

  Next, the operation will be described. FIG. 3 is a flowchart showing the operation of opening and closing the valves 6 and 9 of the control panel 3 according to the second embodiment. In the figure, first, the control panel 3 starts counting the cumulative start time of the passenger conveyor (step S1), sets the control mode to the heat exchange mode (step S2), and circulates the lubricating oil in the circulation pipe 4. . Then, the control panel 3 confirms whether or not the cumulative activation time is equal to or longer than the fueling start time (step S3), and waits until the cumulative activation time is equal to or longer than the fueling start time.

  When the cumulative activation operation time becomes equal to or longer than the fueling start time, the control panel 3 measures the temperature in the upper machine room 2 and confirms whether the temperature in the upper machine room 2 is lower than the specified temperature (step S4). If the temperature in the upper machine room 2 is lower than the specified temperature, the control panel 3 sets the control mode to the oil supply mode (step S5), opens the oil supply valve 7 and closes the circulation valve 9 to Start refueling the conveyor chain. Then, the control panel 3 confirms whether or not the refueling time has expired (step S6), and waits until the refueling time has expired. When the refueling time expires, the control panel 3 resets the cumulative activation time of the passenger conveyor (step S7), and starts counting from the initial value of the cumulative activation time of the passenger conveyor.

  When the temperature in the upper machine room 2 is equal to or higher than the specified temperature, the control panel 3 starts a warning timer (step S8) and checks whether the warning timer is within the set time (step S9). Then, the control panel 3 waits until the warning timer exceeds the set time or the temperature in the upper machine room 2 becomes lower than the specified temperature. Here, when the temperature in the upper machine room 2 becomes lower than the specified temperature, the control panel 3 stops the warning timer and sets the control mode to the fueling mode until the fueling time expires (steps S5 and S6). The accumulated activation time of the passenger conveyor is reset (step S7), and counting from the initial value of the accumulated activation time of the passenger conveyor is started.

  On the other hand, when the warning timer exceeds the set time, the control panel 3 determines that a temperature abnormality has occurred in the upper machine room 2 and transmits warning information to the management panel of the management center (step S10). While continuing the operation, the system waits until a manual reset is received (step S11). Upon receiving a manual reset, the control panel 3 determines that the temperature abnormality in the upper machine room 2 has been resolved, stops sending warning information to the management panel, and sets the control mode to the fueling mode until the refueling expiration time is reached. (Steps S5 and S6), the accumulated activation time of the passenger conveyor is reset (Step S7), and counting from the initial value of the accumulated activation time of the passenger conveyor is started.

  In the heat dissipating device for the passenger conveyor as described above, the heat exchange mode is prioritized over the refueling mode when the temperature in the machine room is equal to or higher than the specified temperature. Can be prevented.

  Further, since the occurrence of temperature abnormality in the machine room is notified to the management panel of the management center, the maintenance efficiency of the passenger conveyor can be improved.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described. The control panel 3 according to the third embodiment stops the drive of the oil pump 11 if the temperature in the upper machine chamber 2 is lower than the specified temperature in the heat exchange mode. Further, the control panel 3 drives the oil pump 11 when the temperature in the upper machine room 2 is equal to or higher than the specified temperature in the heat exchange mode. That is, the control panel 3 performs drive control of the oil pump 11 according to the temperature in the upper machine room 2 in the heat exchange mode. Other configurations are the same as those of the second embodiment.

  FIG. 4 is a flowchart showing the operations of the opening / closing control of the valves 6 and 9 and the drive control of the oil pump 11 of the control panel 3 according to the third embodiment. In the figure, first, the control panel 3 starts counting the cumulative startup time of the passenger conveyor (step S21), sets the control mode to the heat exchange mode (step S22), closes the fuel supply valve 7, and turns the circulation valve 9 And the oil pump 11 is driven (step S23), and the lubricating oil is circulated in the circulation pipe 4. Then, the control panel 3 confirms whether or not the cumulative activation time is equal to or longer than the refueling start time (step S24).

  When the cumulative activation time is less than the refueling start time, the control panel 3 measures the temperature in the upper machine room 2 and confirms whether the temperature in the upper machine room 2 is less than the specified temperature (step S25). . When the temperature in the upper machine room 2 is lower than the specified temperature, the control panel 3 stops driving the oil pump 11 (step S26), or the cumulative start time becomes equal to or longer than the fuel supply start time, or the upper machine room. Wait until the temperature in 2 reaches the specified temperature. Further, when the temperature in the upper machine room 2 is equal to or higher than the specified temperature, the control panel 3 continues to drive the oil pump 11 (continues the circulation in the circulation flow path using the lubricating oil), and the cumulative startup time. Waits until the refueling start time is reached or the temperature in the upper machine room 2 becomes less than the specified temperature.

  When the cumulative activation time becomes equal to or longer than the refueling start time, the control panel 3 sets the control mode to the refueling mode (step S27), opens the refueling valve 7, closes the circulation valve 9, and closes the oil pump 11. Drive (step S28), start refueling the passenger conveyor chain, and wait until the refueling time expires (step S29). When the refueling time expires, the control panel 3 resets the cumulative activation time of the passenger conveyor heat dissipating device (step S30), and starts counting from the initial value of the passenger conveyor cumulative activation time.

  In the heat dissipation device for the passenger conveyor as described above, the oil pump is controlled according to the temperature in the upper machine room, and the oil pump is driven only when heat exchange is necessary. Energy saving can be achieved.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described. FIG. 5 is a side view showing a part of a heat dissipating device for a passenger conveyor according to the fourth embodiment. 6 is a cross-sectional view taken along the line VI-VI in FIG. In the figure, an opening 1 a is provided in the upper part of the upper machine room 2 of the main frame 1. The opening 1 a is closed by the lid 12. On the back surface (upper machine room 2 side) of the lid 12, heat radiating fins 12a are formed to dissipate heat generated in the upper machine room 2 to the outside of the main frame 1. The control panel 3 is provided with a exhaust hot air guide plate 13. The exhaust hot air guide plate 13 is a guide plate for guiding the exhaust hot air (arrow 3a) from the control panel 3 to the heat absorbing part 4e and the heat radiating fins 12a (in the direction of the arrow 3b). Other configurations and operations are the same as those in the third embodiment.

  In the heat radiating device for a passenger conveyor as described above, heat generated in the upper machine room is dissipated to the outside of the main frame by the heat radiating fins, so that the heat radiating efficiency can be further improved.

  Further, since the exhaust heat air from the control panel is guided to the heat absorption part and the heat radiating fin by the exhaust heat air guide plate, the heat absorption efficiency by the heat absorption part can be further improved.

Embodiment 5 FIG.
Next, a fifth embodiment of the present invention will be described. FIG. 7 is a configuration diagram illustrating a heat dissipation device for a passenger conveyor according to the fifth embodiment. In the figure, an oil tank 10 has a circulation chamber 10a for collecting lubricating oil that is circulated in the circulation pipe 4 and returned to the oil tank 10, and an oil supply chamber 10b for collecting lubricating oil to be supplied to a chain of a passenger conveyor. ing. The circulation chamber 10a and the oil supply chamber 10b are partitioned in the oil tank 10 by a partition 10c. The oil pump 11 pumps up the lubricating oil in the circulation chamber 10a or the lubricating oil in the oil supply chamber 10b through a tank valve (electromagnetic valve) 14. The opening and closing of the tank valve 14 is controlled by the control panel 3.

  In the heat exchange mode, the control panel 3 opens the circulation chamber 10a side of the tank valve 14, closes the oil supply chamber 10b side, and causes the oil pump 11 to pump up the lubricating oil in the circulation chamber 10a. Further, the control panel 3 opens the oil supply chamber 10b side of the tank valve 14 and closes the circulation chamber 10a side in the oil supply mode, and causes the oil pump 11 to pump up the lubricating oil in the oil supply chamber 10b. Other configurations and operations are the same as those in the fourth embodiment.

  In the heat dissipation device for the passenger conveyor as described above, since the oil tank is partitioned into the circulation chamber and the oil supply chamber, the lubricating oil for circulation (for heat radiation cooling) can be stored, resulting in a lack of lubricating oil. A decrease in heat dissipation efficiency can be prevented.

Embodiment 6 FIG.
Next, a sixth embodiment of the present invention will be described. FIG. 8 is a configuration diagram illustrating a heat dissipation device for a passenger conveyor according to the sixth embodiment. In the figure, a meandering (continuous U-shaped) cooling part 4h is formed in the vicinity of the lower chord part 4c and the end part on the intermediate part 4b side. The cooling unit 4h is provided with a cooling device 15 as a cooling means. For example, coolant such as water and oil is injected into the cooling device 15. The lubricating oil flowing in the cooling unit 4 h is absorbed by the coolant in the cooling device 15. Other configurations and operations are the same as those of the fifth embodiment.

  In the heat dissipating device for the passenger conveyor as described above, the heat of the lubricating oil circulated through the circulation channel is absorbed by the cooling device, so that the efficiency of heat exchange between the upper machine room and the outside of the upper machine room is further improved. The heat dissipation efficiency can be further improved.

  In the sixth embodiment, a coolant such as water and oil is used as the cooling means. However, the present invention is not limited to the coolant, and for example, a cooling fan or the like may be used.

  Moreover, the heat radiating device for passenger conveyors according to the first to sixth embodiments can be applied to escalators and moving walkways.

  Furthermore, the heat dissipation device for the passenger conveyor according to the first to sixth embodiments is a liquid-cooled passenger by the circulation channel, the circulation pump, and the circulation control unit even when the oil tank, the oil supply channel, the oil supply valve, and the circulation valve are not applied. A heat radiating device of the conveyor may be configured, and in this case, the refrigerant is not limited to the lubricating oil, and for example, a cooling liquid such as water may be used.

It is a side view which shows the heat radiating device of the passenger conveyor by Embodiment 1 of this invention. It is a block diagram which shows specifically the heat radiating device of the passenger conveyor of FIG. It is a flowchart which shows the operation | movement of the opening / closing control of each valve | bulb of the control panel by Embodiment 2 of this invention. It is a flowchart which shows operation | movement with the opening / closing control of each valve | bulb of the control panel by this Embodiment 3, and drive control of an oil pump. It is a side view which shows a part of heat radiating device of the passenger conveyor by Embodiment 4 of this invention. It is sectional drawing which follows the VI-VI line of FIG. It is a block diagram which shows the heat radiating device of the passenger conveyor by Embodiment 5 of this invention. It is a block diagram which shows the heat radiating device of the passenger conveyor by Embodiment 6 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Main frame, 2 Upper machine room, 3 Control panel (circulation control part), 4 Circulation piping (circulation flow path formation member), 4e Heat absorption part, 6 Oil supply piping (oil supply flow path formation member), 7 Oil supply valve, 10 Oil Tank, 10a Circulation chamber, 10b Oil supply chamber, 11 Oil pump (circulation pump), 12 Lid, 12a Radiation fin, 13 Waste hot air guide plate, 14 Tank valve (electromagnetic valve), 15 Cooling device (cooling means).

Claims (7)

A circulation flow path forming member that has a heat absorption part that absorbs heat generated in the machine room and forms a circulation flow path for circulating a refrigerant between the heat absorption part and the outside of the machine room in the main frame;
A circulation pump that is provided in the circulation channel forming member and circulates the refrigerant in the circulation channel; and a circulation control unit that is provided in the machine chamber and controls driving of the circulation pump ;
The circulation channel forming member is provided with a cooling means for cooling the refrigerant,
As the refrigerant, use lubricating oil supplied to the passenger conveyor chain,
A heat dissipating device for passenger conveyors. An oil tank that is connected to the circulation channel forming member at a part of the circulation channel and stores the lubricating oil;
2. The heat dissipation device for a passenger conveyor according to claim 1 , wherein the circulation pump circulates the lubricating oil in the circulation flow path by pumping up the lubricating oil in the oil tank. An oil supply channel forming member connected to the circulation channel forming member and forming an oil supply channel for guiding the lubricating oil in the circulation channel forming member to the chain, and provided in the oil supply channel forming member, An oil supply valve that can open and close the oil supply flow path is further provided.
The circulation control unit includes a heat exchange mode in which the oil supply valve is closed to circulate the lubricating oil in the circulation flow path, and the oil supply in which the oil supply valve is opened to supply the lubricating oil to the chain. The heat dissipation device for a passenger conveyor according to claim 1 or 2 , wherein opening and closing of the fuel supply valve is controlled by a plurality of control modes including a mode. 4. The passenger conveyor according to claim 3 , wherein the circulation control unit is capable of counting a cumulative start time of the passenger conveyor, and sets the control mode to the refueling mode when the cumulative start time reaches a predetermined time or more. Heat dissipation device. When the control mode is the heat exchange mode, the circulation control unit stops driving the circulation pump when the temperature in the machine room becomes lower than a predetermined value, and the temperature in the machine room becomes equal to or higher than the predetermined value. The heat dissipation device for a passenger conveyor according to claim 3 or 4 , wherein the circulating pump is driven. The oil tank has an oil supply chamber for storing the lubricating oil supplied to the chain, and a circulation chamber for storing the lubricating oil that is circulated in the circulation flow path and returned to the oil tank. claim the circulating pump, via a tank valve that is provided between the circulation pump and the oil tank, characterized in that pumping the lubricating oil from at least one of said oil supply chamber and the circulating chamber The heat dissipation device for a passenger conveyor according to any one of claims 2 to 5 . A lid that closes an opening provided in the upper part of the machine room of the main frame, provided on the machine room side of the lid, and radiating fins for absorbing heat generated in the machine room; and provided in the machine room, The heat dissipation device for a passenger conveyor according to any one of claims 1 to 6 , further comprising an exhaust hot air guide plate that guides the generated heat to at least one of the heat absorption part and the heat radiation fin. .

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